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Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Wireless Networking  

Science Conference Proceedings (OSTI)

Over the past decade, the world has witnessed an explosion in the development and deployment of new wireless network technologies. From cellular mobile telephony to the ubiquitous "WiFi" networks in coffee-shops and airports, to the emerging WiMAX wireless ... Keywords: Networking

Anurag Kumar; D. Manjunath; Joy Kuri

2008-03-01T23:59:59.000Z

2

Wireless sensor network survey  

Science Conference Proceedings (OSTI)

A wireless sensor network (WSN) has important applications such as remote environmental monitoring and target tracking. This has been enabled by the availability, particularly in recent years, of sensors that are smaller, cheaper, and intelligent. These ... Keywords: Protocols, Sensor network deployment, Sensor network services, Survey, Wireless sensor network

Jennifer Yick; Biswanath Mukherjee; Dipak Ghosal

2008-08-01T23:59:59.000Z

3

Towards Embedded Wireless-Networked Intelligent Daylighting Systems for Commercial Buildings  

E-Print Network (OSTI)

Energy efficient office lighting systems can save 40% in electricity consumption in areas that receive significant amounts of daylight. In spite of the savings they can generate, daylighting systems are not widely used in the commercial office building. Barriers prohibiting adoption include high retrofitting costs, and difficulty estimating and maintaining worksurface illuminances. In this paper, an intelligent control framework that utilizes MEMS-based (micro-electro-mechanical systems) ‘Smart Dust motes’ wireless platforms is explored. Due to their small size, they can be placed directly on the worksurface. As a result, illuminance estimation and maintenance is significantly improved. Furthermore, motes functioning as actuators can be interfaced with dimming ballasts without the need to rewire the building, enabling less expensive, less disruptive retrofitting of commercial buildings.

Yao-Jung Wen; et al.

2006-01-01T23:59:59.000Z

4

Network coded wireless architecture  

E-Print Network (OSTI)

Wireless mesh networks promise cheap Internet access, easy deployment, and extended range. In their current form, however, these networks suffer from both limited throughput and low reliability; hence they cannot meet the ...

Katti, Sachin Rajsekhar

2008-01-01T23:59:59.000Z

5

Wireless Sensor Network Fundamentals  

NLE Websites -- All DOE Office Websites (Extended Search)

Wireless Sensor Network Fundamentals Wireless Sensor Network Fundamentals Speaker(s): Steven Lanzisera Date: February 8, 2010 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Kevin Kircher Wireless sensor networks have been promising to provide easy data collection and control capability to applications ranging from scientific data collection, disaster recover, national security, and more. The user experience, however, has been filled with confusing terminology, complicated systems, and a lack of interoperability between vendors. Users with a background in the technology and fundamentals are better able to understand system capabilities, make decisions, and end up with a network that meets their needs. Although a sufficient coverage of this topic is at least a semester course, the goal of this talk is to give a brief

6

Miniaturized wireless sensor network  

E-Print Network (OSTI)

This paper addresses an overview of the wireless sensor networks. It is shown that MEMS/NEMS technologies and SIP concept are well suited for advanced architectures. It is also shown analog architectures have to be compatible with digital signal techniques to develop smart network of microsystem.

Lecointre, Aubin; Dubuc, David; Katia, Grenier; Patrick, Pons; Aubert, Hervé; Muller, A; Berthou, Pascal; Gayraud, Thierry; Plana, Robert

2010-01-01T23:59:59.000Z

7

Mobility in Wireless Sensor Networks  

E-Print Network (OSTI)

the 802.15.4 radio (for wireless operation) as well as thewireless sensor network protocol, significant power can be saved during network operations.

Mehta, Ankur Mukesh

2012-01-01T23:59:59.000Z

8

Towards Embedded Wireless-Networked Intelligent Daylighting Systems for Commercial Buildings  

Science Conference Proceedings (OSTI)

Energy efficient office lighting systems can save 40% in electricity consumption in areas that receive significant amounts of daylight. In spite of the savings they can generate, daylighting systems are not widely used in the commercial office building. ...

Yao-Jung Wen; Jessica Granderson; Alice M. Agogino

2006-06-01T23:59:59.000Z

9

Networking support for underwater wireless networks.  

E-Print Network (OSTI)

?? Underwater wireless networks provide many opportunities for exploration, environmental monitoring, and military applications. Future growth of underwater networks seems promising as much of the… (more)

Kredo, Kurtis B., II

2010-01-01T23:59:59.000Z

10

Cooperative routing in wireless networks  

E-Print Network (OSTI)

In this thesis, we study the problem of energy efficiency and reliability in wireless ad-hoc networks. First, we introduce the idea of wireless cooperation advantage. We formulate the problem of finding the minimum energy ...

Khandani, Amir E. (Amir Ehsan), 1979-

2004-01-01T23:59:59.000Z

11

Insecurity of Wireless Networks  

SciTech Connect

Wireless is a powerful core technology enabling our global digital infrastructure. Wi-Fi networks are susceptible to attacks on Wired Equivalency Privacy, Wi-Fi Protected Access (WPA), and WPA2. These attack signatures can be profiled into a system that defends against such attacks on the basis of their inherent characteristics. Wi-Fi is the standard protocol for wireless networks used extensively in US critical infrastructures. Since the Wired Equivalency Privacy (WEP) security protocol was broken, the Wi-Fi Protected Access (WPA) protocol has been considered the secure alternative compatible with hardware developed for WEP. However, in November 2008, researchers developed an attack on WPA, allowing forgery of Address Resolution Protocol (ARP) packets. Subsequent enhancements have enabled ARP poisoning, cryptosystem denial of service, and man-in-the-middle attacks. Open source systems and methods (OSSM) have long been used to secure networks against such attacks. This article reviews OSSMs and the results of experimental attacks on WPA. These experiments re-created current attacks in a laboratory setting, recording both wired and wireless traffic. The article discusses methods of intrusion detection and prevention in the context of cyber physical protection of critical Internet infrastructure. The basis for this research is a specialized (and undoubtedly incomplete) taxonomy of Wi-Fi attacks and their adaptations to existing countermeasures and protocol revisions. Ultimately, this article aims to provide a clearer picture of how and why wireless protection protocols and encryption must achieve a more scientific basis for detecting and preventing such attacks.

Sheldon, Frederick T [ORNL; Weber, John Mark [Dynetics, Inc.; Yoo, Seong-Moo [University of Alabama, Huntsville; Pan, W. David [University of Alabama, Huntsville

2012-01-01T23:59:59.000Z

12

Attacking Automatic Wireless Network Selection  

E-Print Network (OSTI)

Wireless 802.11 networking is becoming so prevalent that many users have become accustomed to having available wireless networks in their workplace, home, and many public places such as airports and coffee shops. Modern client operating systems implement automatic wireless network discovery and known network identification to facilitate wireless networking for the end-user. In order to implement known network discovery, client operating systems remember past wireless networks that have been joined and automatically look for these networks (referred to as Preferred or Trusted Networks) whenever the wireless network adapter is enabled. By examining these implementations in detail, we have discovered previously undisclosed vulnerabilities in the implementation of these algorithms under the two most prevalent client operating systems, Windows XP and MacOS X. With custom base station software, an attacker may cause clients within wireless radio range to associate to the attacker’s wireless network without user interaction or notification. This will occur even if the user has never connected to a wireless network before or they have an empty Preferred/Trusted Networks List. We describe these vulnerabilities as well as their implementation and impact. 1

Dino A. Dai Zovi; Shane A. Macaulay

2005-01-01T23:59:59.000Z

13

Localized power-aware routing in linear wireless sensor networks  

Science Conference Proceedings (OSTI)

Energy-efficency is a key concern when designing protocols for wireless sensor networks (WSN). This is of particular importance in commercial applications where demonstrable return on investment is a crucial factor. One such commercial application that ... Keywords: energy efficiency, linear topology, localized protocol, routing, wireless sensor network

Marco Zimmerling; Waltenegus Dargie; Johnathan M. Reason

2008-05-01T23:59:59.000Z

14

CS 535- Wireless Network Security  

E-Print Network (OSTI)

This is a 3-credit course that focuses on security and privacy issues in wireless networks and systems. Generally the security of MAC and especially upper layers are considered in this class. This course is not intended to cover cryptography in detail, but an overview of cryptography will be given at the beginning of the course so that the students who do not know cryptography would have sufficient information to understand the rest of the course. Although the catalogue information for this course (see below) several sub areas of wireless network security, in this course we will focus on ad hoc and sensor network security. Catalogue Data: This course covers security and privacy issues in wireless networks and systems, such as cellular networks, wireless LANs, wireless PANs, mobile ad hoc networks, vehicular networks, satellite networks, wireless mesh networks, sensor networks and RFID systems. Security problems of MAC and especially upper layers will be emphasized. Attacks and proposed solutions at several layers, authentication, key distribution and key management, secure routing, selfish and malicious behaviors, and secure group communication are analyzed for applicable wireless network types. A short overview of cryptography and wireless networking principles will be given at the beginning of the course. Prerequisite: Formally there is no prerequisite for this course, but students are expected to come with undergrad level computer networks background. Moreover, computer-programming expertise is necessary. Instructor: Schedule:

Albert Levi

2008-01-01T23:59:59.000Z

15

Security for wireless sensor networks  

Science Conference Proceedings (OSTI)

This chapter identifies the vulnerabilities associated with the operational paradigms currently employed by Wireless Sensor Networks. A survey of current WSN security research is presented. The security issues of Mobile Ad-Hoc Networks and infrastructure ... Keywords: WSN, security, sensor networks, wireless

Sasikanth Avancha; Jeffrey Undercoffer; Anupam Joshi; John Pinkston

2004-01-01T23:59:59.000Z

16

Proactive mobile wireless networks : an infrastructureless wireless network architecture for delay-sensitive applications  

E-Print Network (OSTI)

Infrastructureless wireless networks are an important class of wireless networks that is best suited for scenarios where there is temporary and localized telecommunication demand. Such networks consist of wireless devices ...

Dai, Lillian Lei, 1978-

2008-01-01T23:59:59.000Z

17

Large wireless networks : fundamental limits and design issues  

E-Print Network (OSTI)

design and operation of wireless networks? Unfortunately notWireless Communications: Scaling Laws and Optimal Operation”,

Minero, Paolo

2010-01-01T23:59:59.000Z

18

Simulating networks of wireless sensors  

Science Conference Proceedings (OSTI)

Recent advances in low-power embedded processors, radios, and micro-mechanical systems (MEMs) have made possible the development of networks of wirelessly interconnected sensors. With their focus on applications requiring tight coupling with the physical ...

Sung Park; Andreas Savvides; Mani B. Srivastava

2001-12-01T23:59:59.000Z

19

Connectivity problem in wireless networks  

Science Conference Proceedings (OSTI)

We study the complexity of the following connectivity problem in wireless networks: for a given placement of n nodes in the plane, the goal is to compute a channel and power assignment that forms strongly connected communication structure spanning ...

Dariusz R. Kowalski; Mariusz A. Rokicki

2010-09-01T23:59:59.000Z

20

Securing network access in wireless sensor networks  

Science Conference Proceedings (OSTI)

In wireless sensor networks, it is critical to restrict the network access only to eligible sensor nodes, while messages from outsiders will not be forwarded in the networks. In this paper, we present the design, implementation, and evaluation of a secure ... Keywords: elliptic curve cryptography, security, sensor networks

Kun Sun; An Liu; Roger Xu; Peng Ning; Douglas Maughan

2009-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Smarter cities through standards-based wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSNs) started as an academic concept and became a commercially relevant technology. This technology will play a key role in creating more instrumented and interconnected urban environments. The resulting smarter cities will ...

T. Watteyne; K. S. J. Pister

2011-01-01T23:59:59.000Z

22

Selecting forwarding neighbors in wireless ad hoc networks  

E-Print Network (OSTI)

networking operation in wireless ad hoc networks. It isa fundamental operation which is frequent in wireless ad hoc

Calinescu, G; Mandoiu, Ion I; Wan, P J; Zelikovsky, A Z

2004-01-01T23:59:59.000Z

23

QOMB: A wireless network emulation testbed  

Science Conference Proceedings (OSTI)

In this paper we present QOMB, a testbed we designed and implemented for the evaluation of wireless network systems, protocols and applications. The testbed uses the wireless network emulation set of tools QOMET so as to reproduce in a wired network, ... Keywords: emulation, real-time, testbed, wireless networks

Razvan Beuran; Lan Tien Nguyen; Toshiyuki Miyachi; Junya Nakata; Ken-ichi Chinen; Yasuo Tan; Yoichi Shinoda

2009-11-01T23:59:59.000Z

24

A survey on wireless body area networks  

Science Conference Proceedings (OSTI)

The increasing use of wireless networks and the constant miniaturization of electrical devices has empowered the development of Wireless Body Area Networks (WBANs). In these networks various sensors are attached on clothing or on the body or even implanted ... Keywords: MAC, Routing, Wireless body area networks

Benoît Latré; Bart Braem; Ingrid Moerman; Chris Blondia; Piet Demeester

2011-01-01T23:59:59.000Z

25

Wireless sensor network operating systems: a survey  

Science Conference Proceedings (OSTI)

The design of operating system for Wireless Sensor Network (WSN) deviates from the traditional operating system design due to their specific characteristics like constrained resources, high dynamics and inaccessible deployment environments. We ... Keywords: TinyOS, WSN operating systems, WSNs, ad-hoc networks, applications, characteristics, classification framework, design, embedded systems, reprogramming, survey, virtual machines, wireless networks, wireless sensor networks

Adi Mallikarjuna V. Reddy; A.V.U. Phani Kumar; D. Janakiram; G. Ashok Kumar

2009-08-01T23:59:59.000Z

26

Adaptive Scheduling in Ad Hoc and Cellular Wireless Networks  

E-Print Network (OSTI)

Under unicast operations in wireless cellular networks, wetransmission operations in cellular wireless networks. Underoperation for failovers under heterogeneous traffic loading conditions in wireless

Tan, Choo Chin

2013-01-01T23:59:59.000Z

27

A survey on wireless sensor network infrastructure for agriculture  

Science Conference Proceedings (OSTI)

The hybrid wireless sensor network is a promising application of wireless sensor networking techniques. The main difference between a hybrid WSN and a terrestrial wireless sensor network is the wireless underground sensor network, which communicates ... Keywords: Agriculture, Hybrid wireless sensor network, Information collection, Monitoring, Wireless underground sensor network

Xiaoqing Yu; Pute Wu; Wenting Han; Zenglin Zhang

2013-01-01T23:59:59.000Z

28

Distributed computation in wireless and dynamic networks  

E-Print Network (OSTI)

Today's wireless networks tend to be centralized: they are organized around a fixed central backbone such as a network of cellular towers or wireless access points. However, as mobile computing devices continue to shrink ...

Oshman, Rotei

2012-01-01T23:59:59.000Z

29

Mutual Exclusion on Multihop, Mobile Wireless Networks  

Science Conference Proceedings (OSTI)

The system considered in this paper is a mobile wireless network, commonly known as an ad hoc network. Mobile nodes in this dynamic topology function both as processors and routers to provide communication between nodes which are not within wireless ...

Jennifer Walter; Savita Kini

1997-12-01T23:59:59.000Z

30

Hierarchical Routing over Dynamic Wireless Networks  

E-Print Network (OSTI)

Wireless network topologies change over time and maintaining routes requires frequent updates. Updates are costly in terms of consuming throughput available for data transmission, which is precious in wireless networks. In this paper, we ask whether there exist low-overhead schemes that produce low-stretch routes. This is studied by using the underlying geometric properties of the connectivity graph in wireless networks.

Tschopp, Dominique; Grossglauser, Matthias

2009-01-01T23:59:59.000Z

31

Wireless sensor networks for soil science  

Science Conference Proceedings (OSTI)

Wireless sensor networks can revolutionise soil ecology by providing measurements at temporal and spatial granularities previously impossible. This paper presents our first steps towards fulfilling that goal by developing and deploying two experimental ... Keywords: WSNs, environmental monitoring, soil moisture, soil monitoring, soil science, soil temperature, urban forests, web services, wireless networks, wireless sensor networks

Andreas Terzis; Razvan Musaloiu-E.; Joshua Cogan; Katalin Szlavecz; Alexander Szalay; Jim Gray; Stuart Ozer; Chieh-Jan Mike Liang; Jayant Gupchup; Randal Burns

2010-02-01T23:59:59.000Z

32

Implementation Guideline for Wireless Networks and Wireless Equipment Condition Monitoring  

Science Conference Proceedings (OSTI)

The use of wireless technology in industrial settings has undergone significant development. The benefits for its use in the nuclear power industry have motivated several member utilities to undertake significant implementation efforts. This report includes guidance for the implementation of a wireless network within a nuclear power plant, with a secondary emphasis on the use of wireless sensors for asset condition monitoring.

2009-12-23T23:59:59.000Z

33

A platform for wireless networked transducers  

Science Conference Proceedings (OSTI)

As computers, sensors, and wireless communication have become smaller, cheaper, and more sophisticated, wireless transducer platforms have become a focus of research and commercial interest. This report describes an investigation into such platforms. ...

Bernard Horan; Bill Bush; John Nolan; David Cleal

2007-03-01T23:59:59.000Z

34

Wireless sensor networks and human comfort index  

Science Conference Proceedings (OSTI)

Conventional wireless home automation networks (WHANs) incorporate embedded wireless sensors and actuators that monitors and control home living environment. WHAN's primary goal is to maintain user comfort and efficient home management. Conventional ... Keywords: Ambient intelligence, Fuzzy logic, Human comfort, Wireless sensor network

Mohd Izani Rawi, Adnan Al-Anbuky

2013-06-01T23:59:59.000Z

35

Design of large-scale agricultural wireless sensor networks: email from the vineyard  

Science Conference Proceedings (OSTI)

We describe the design and implementation of a large-scale Wireless Sensor Network (WSN) for agriculture monitoring. As a part of validation we have deployed a prototype of 64 sensors to monitor a commercial vineyard. The system provides ... Keywords: WSN testbed, agricultural WSNs, agriculture monitoring, commercial vineyards, data collection, data storage, geographical coverage, large-scale WSNs, spatial resolution, vineyeard monitoring, wireless networks, wireless sensor networks

Christine Jardak; Krisakorn Rerkrai; Aleksandar Kovacevic; Janne Riihijarvi; Petri Mahonen

2010-08-01T23:59:59.000Z

36

for distributed wireless sensor networks  

E-Print Network (OSTI)

MEMS technology is enabling the development of inexpensive, autonomous wireless sensor nodes with volumes ranging from cubic mm to several cubic cm. These tiny sensor nodes can form rapidly deployed, massive distributed networks to allow unobtrusive, spatially dense, sensing and communication. MEMS enable these devices by reducing both the volume and energy consumption of various components. This paper will review some of the wireless sensor nodes under development and applicable MEMS devices for small and efficient optical communication, micropower generation, and sensing. In addition, CMOS post-process micromachining will be discussed as a method of achieving low cost and high integration. 1.

Brett A. Warneke; Kristofer S. J. Pister

2002-01-01T23:59:59.000Z

37

Wireless sensor networks for habitat monitoring  

Science Conference Proceedings (OSTI)

We provide an in-depth study of applying wireless sensor networks to real-world habitat monitoring. A set of system design requirements are developed that cover the hardware design of the nodes, the design of the sensor network, and the capabilities ... Keywords: environmental monitoring, habitat monitoring, low power systems, sensor network architecture, wireless sensor networks

Alan Mainwaring; David Culler; Joseph Polastre; Robert Szewczyk; John Anderson

2002-09-01T23:59:59.000Z

38

Zonal Rumor Routing for Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Routing algorithms for wireless sensor networks are constrained by power, memory and computational resources. Rumor Routing algorithm for sensor networks spreads theinformation of an event to other nodes in the network, thus enabling queries to discover ... Keywords: Sensor Network, Routing, Wireless, Rumor Routing

Tarun Banka; Gagan Tandon; Anura P. Jayasumana

2005-04-01T23:59:59.000Z

39

Efficient XML usage within wireless sensor networks  

Science Conference Proceedings (OSTI)

Integrating wireless sensor networks in heterogeneous networks is a complex task. A reason is the absence of a standardized data exchange format that is supported in all participating sub networks. XML has evolved to the de facto standard data exchange ... Keywords: XML, database management, programming language, wireless sensor networks

Nils Hoeller; Christoph Reinke; Jana Neumann; Sven Groppe; Daniel Boeckmann; Volker Linnemann

2008-11-01T23:59:59.000Z

40

Strategies and Challenges for Interconnecting Wireless Mesh and Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks and wireless mesh networks are popular research subjects. The interconnection of both network types enables next-generation applications and creates new optimization opportunities. However, current single-gateway solutions are ... Keywords: Cooperation strategies, Future networks, Wireless mesh network, Wireless sensor network

Stefan Bouckaert; Eli De Poorter; Benôit Latré; Jeroen Hoebeke; Ingrid Moerman; Piet Demeester

2010-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

LUSTER: wireless sensor network for environmental research  

Science Conference Proceedings (OSTI)

Environmental wireless sensor network (EWSN) systems are deployed in potentially harsh and remote environments where inevitable node and communication failures must be tolerated. LUSTER---Light Under Shrub Thicket for Environmental Research---is a system ... Keywords: LiteTDMA, architecture, environmental science, implementation, mote, network protocol, storage, validation, wireless sensor network

L. Selavo; A. Wood; Q. Cao; T. Sookoor; H. Liu; A. Srinivasan; Y. Wu; W. Kang; J. Stankovic; D. Young; J. Porter

2007-11-01T23:59:59.000Z

42

Energy Saving Methods in Wireless Sensor Networks.  

E-Print Network (OSTI)

?? To predict the lifetime of wireless sensor networks before their installation is an important concern. The IEEE 802.15.4 standard is specifically meant to support… (more)

JAWAD ALI, SYED

2008-01-01T23:59:59.000Z

43

Security and Performance Considerations in Wireless Networks  

E-Print Network (OSTI)

ACM Workshop on Wireless Security, 2004. [3] ISM Wide-bandTraffic Flows. In Network Security Lab (NSL) Technicalthe Challenges of Security in a Mobile Environment. In

Pelechrinis, Konstantinos

2010-01-01T23:59:59.000Z

44

Experiences from a wireless sensor network deployment in a petroleum environment  

Science Conference Proceedings (OSTI)

In this paper, we describe our experiences in the design, implementation and deployment of a wireless sensor network in a petroleum facility. A heterogeneous architecture is devised using Commercial Off-the-Shelf equipment and hardware interface is designed ... Keywords: embedded systems, heterogeneous networks, wireless sensor networks

Ian Johnstone; James Nicholson; Babar Shehzad; Jeff Slipp

2007-08-01T23:59:59.000Z

45

Mobility in wireless networks  

Science Conference Proceedings (OSTI)

This article surveys mobility patterns and mobility models for wirelss networks. Mobility patterns are classified into the following types: pedestrians, vehicles, aerial, dynamic medium, robot, and outer space motion. We present the characteristics of ...

Christian Schindelhauer

2006-01-01T23:59:59.000Z

46

Battery Allocation for Maximizing Lifetime of Wireless Sensor Networks.  

E-Print Network (OSTI)

??Wireless sensor network has been an area of interest among researchers. Designing a wireless sensor network involves multiple issues such as size and processing capacity… (more)

Khambete, Ketki

2010-01-01T23:59:59.000Z

47

Recommended Practices Guide For Securing ZigBee Wireless Networks...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

networks. ZigBee is a protocol specification and industry standard for a type of wireless communications technology generically known as Low-Rate Wireless Personal Area Networks...

48

Networked computing in wireless sensor networks for structural health monitoring  

Science Conference Proceedings (OSTI)

This paper studies the problem of distributed computation over a network of wireless sensors. While this problem applies to many emerging applications, to keep our discussion concrete, we will focus on sensor networks used for structural health monitoring. ... Keywords: clustering, degree-constrained data collection tree, networked computing, singular value decomposition (SVD), structural health monitoring (SHM), wireless sensor networks (WSNs)

Apoorva Jindal; Mingyan Liu

2012-08-01T23:59:59.000Z

49

Energy efficiency in wireless networks  

E-Print Network (OSTI)

Energy is a critical resource in the design of wireless networks since wireless devices are usually powered by batteries. Battery capacity is finite and the progress of battery technology is very slow, with capacity expected to make little improvement in the near future. Under these conditions, many techniques for conserving power have been proposed to increase battery life. In this dissertation we consider two approaches to conserving the energy consumed by a wireless network interface. One technique is to use power saving mode, which allows a node to power off its wireless network interface (or enter a doze state) to reduce energy consumption. The other is to use a technique that suitably varies transmission power to reduce energy consumption. These two techniques are closely related to theMAC (Medium Access Control) layer. With respect to power saving mode, we study IEEE 802.11 PSM (Power Saving Mechanism) and propose a scheme that improves its energy efficiency. We also investigate the interaction between power saving mode and TCP (Transport Control Protocol). As a second approach to conserving energy, we investigate a simple power control protocol, called BASIC, which uses the maximum transmission power for RTS-CTS and the minimum necessary power for DATA-ACK. We identify the deficiency of BASIC, which increases collisions and degrades network throughput, and propose a power control protocol that addresses these problems and achieves energy savings. Since energy conservation is not an issue limited to one layer of the protocol stack, we study a cross layer design that combines power control at the MAC layer and power aware routing at the network layer. One poweraware routing metric is minimizing the aggregate transmission power on a path from source to destination. This metric has been used along with BASIC-like power control under the assumption that it can save energy, which we show to be false. Also, we show that the power aware routing metric leads to a lower throughput. We show that using the shortest number of hops in conjunction with BASIC-like power control conserves more energy than power aware routing with BASIC-like power control.

Jung, Eun-Sun

2005-08-01T23:59:59.000Z

50

Wireless sensor networks for healthcare: A survey  

Science Conference Proceedings (OSTI)

Becoming mature enough to be used for improving the quality of life, wireless sensor network technologies are considered as one of the key research areas in computer science and healthcare application industries. The pervasive healthcare systems provide ... Keywords: Care for elderly, Children and chronically ill, Pervasive healthcare, Wireless sensor networks

Hande Alemdar; Cem Ersoy

2010-10-01T23:59:59.000Z

51

Efficient code distribution in wireless sensor networks  

Science Conference Proceedings (OSTI)

The need to reprogramme a wireless sensor network may arise from changing application requirements, bug fixes, or during the application development cycle. Once deployed, it will be impractical at best to reach each individual node. Thus, a scheme is ... Keywords: code distribution, compression, reprogramming, sensor networks, string distance, wireless

Niels Reijers; Koen Langendoen

2003-09-01T23:59:59.000Z

52

Diagnostic tracing for wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks are typically deployed in harsh environments, thus post-deployment failures are not infrequent. An execution trace containing events in their order of execution could play a crucial role in postmortem diagnosis of these failures. ... Keywords: Embedded debugging, diagnosis, tracing, wireless sensor networks

Vinaitheerthan Sundaram; Patrick Eugster; Xiangyu Zhang; Vamsidhar Addanki

2013-07-01T23:59:59.000Z

53

Underground Structure Monitoring with Wireless Sensor Networks  

E-Print Network (OSTI)

University of Science and Technology {limo, liu}@cse.ust.hk ABSTRACT Environment monitoring in coal mines, Underground, Coal Mine 1. INTRODUCTION A Wireless Sensor Network (WSN) is a self-organized wireless network and widths of several meters) has been a crucial task to ensure safe working conditions in coal mines where

Liu, Yunhao

54

Cooperative caching in wireless multimedia sensor networks  

Science Conference Proceedings (OSTI)

The recent advances in miniaturization and the creation of low-power circuits, combined with small-sized batteries have made the development of wireless sensor networks a working reality. Lately, the production of cheap complementary metal-oxide semiconductor ... Keywords: cooperative caching, multimedia, replacement policy, wireless sensor networks

Nikos Dimokas; Dimitrios Katsaros; Yannis Manolopoulos

2008-08-01T23:59:59.000Z

55

Deterministic Secure Positioning in Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Position verification problem is an important building block for a large subset of wireless sensor networks (WSN) applications. As a result, the performance of the WSN degrades significantly when misbehaving nodes report false location information in ... Keywords: Distributed Protocol, Secure Positioning, Wireless Sensor Network

Sylvie Delaët; Partha Sarathi Mandal; Mariusz A. Rokicki; Sébastien Tixeuil

2008-06-01T23:59:59.000Z

56

Virtual infrastructure for wireless ad hoc networks  

E-Print Network (OSTI)

One of the most significant challenges introduced by ad hoc networks is coping with the unpredictable deployment, uncertain reliability, and erratic communication exhibited by emerging wireless networks and devices. The ...

Gilbert, Seth, 1976-

2007-01-01T23:59:59.000Z

57

Power Control in Wireless Cellular Networks  

Science Conference Proceedings (OSTI)

Transmit power in wireless cellular networks is a key degree of freedom in the management of interference, energy, and connectivity. Power control in both the uplink and downlink of a cellular network has been extensively studied, especially over the ...

Mung Chiang; Prashanth Hande; Tian Lan; Chee Wei Tan

2008-04-01T23:59:59.000Z

58

Routing in heterogeneous wireless ad hoc networks  

E-Print Network (OSTI)

Wireless ad hoc networks are used in several applications ranging from infrastructure monitoring to providing Internet connectivity to remote locations. A common assumption about these networks is that the devices that ...

Cheekiralla, Sivaram M. S. L., 1980-

2008-01-01T23:59:59.000Z

59

Epidemic Propagation In Overlaid Wireless Networks  

SciTech Connect

Witb tbe emergence of computer worms tbat can spread over air interfaces, wireless ad boc and sensor networks can be vulnerable to node compromises even if the deployed network is not connected to the backbone. Depending on the physical topology of the wireless network, even a single infected node can compromise the whole network. In this work, epidemic (e.g., worm) propagation in a static wireless network is studied, where a number of inCected mobile nodes are injected over the existing network. It is shown that the epidemic spread threshold and size depend on the physical topology of the underlying static wireless network as well as the mobility model employed by the infected mobile nodes. More specifically, results show that in a Cully-connected static wirelessnctwork targeted attacks are more effective, wbereas Cor a random topology random attacks can be sufficient to compromise the whole network.

Yanmaz, Evsen [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

60

Building a wireless network infrastructure under budget constraints  

Science Conference Proceedings (OSTI)

This paper examines wireless networking and provides a case study of a wireless network infrastructure's development at an urban university of 11,000 students. The University of Houston Downtown (UHD) incorporated wireless technology to help ... Keywords: budget constraints, case study, curricula-related products, e-learning, higher education, m-learning, mobile communications, mobile learning, mobile technology, urban university, wireless communications, wireless network infrastructure, wireless networks

Richard A. McMahon; Peter D. DeVries; P. Pete Chong

2005-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Handover strategy of smart mobile terminals among heterogeneous wireless networks  

Science Conference Proceedings (OSTI)

Due to the variety of wireless networks, the handover among heterogeneous wireless networks has become a research hotspot in recent years. More attention have been paid to the radio access network and the core network than the terminal side. In the future ... Keywords: heterogeneous wireless network, network handover, network handover design, smart mobile terminal

Wei Lin; Weiqiang Wu; Qinyu Zhang

2008-07-01T23:59:59.000Z

62

Sleep scheduling for wireless sensor networks via network flow model  

Science Conference Proceedings (OSTI)

The pervasiveness and operational autonomy of mesh-based wireless sensor networks (WSNs) make them an ideal candidate in offering sustained monitoring functions at reasonable cost over a wide area. There has been a general consensus within the research ... Keywords: Cross-layer design, Integer linear programming, Network flow model, Sleep scheduling, Wireless sensor networks

Rick W. Ha; Pin-Han Ho; X. Sherman Shen; Junshan Zhang

2006-08-01T23:59:59.000Z

63

Smart bridges, smart tunnels: Transforming wireless sensor networks from research prototypes into robust engineering infrastructure  

Science Conference Proceedings (OSTI)

We instrumented large civil engineering infrastructure items, such as bridges and tunnels, with sensors that monitor their operational performance and deterioration. In so doing we discovered that commercial offerings of wireless sensor networks (WSNs) ... Keywords: Civil engineering, Deployment, Radio propagation, Realworld experience, Security, Wireless sensor networks

Frank Stajano; Neil Hoult; Ian Wassell; Peter Bennett; Campbell Middleton; Kenichi Soga

2010-11-01T23:59:59.000Z

64

Optimization Online - Energy Savings in Wireless Mesh Networks in ...  

E-Print Network (OSTI)

Jan 24, 2011 ... Abstract: Energy consumption of communication systems is ... Keywords: Energy savings, wireless Mesh Networks, Green networking.

65

TCP with delayed ack for wireless networks  

Science Conference Proceedings (OSTI)

This paper studies the TCP performance with delayed ack in wireless networks (including ad hoc and WLANs) which use IEEE 802.11 MAC protocol as the underlying medium access control. Our analysis and simulations show that TCP throughput does not always ... Keywords: Adaptive delayed ack, Congestion control, Friendliness, TCP, Wireless medium access/contention

Jiwei Chen; Mario Gerla; Yeng Zhong Lee; M. Y. Sanadidi

2008-09-01T23:59:59.000Z

66

Embracing Wireless Interference: Analog Network Coding  

E-Print Network (OSTI)

Traditionally, interference is considered harmful.Wireless networks strive to avoid scheduling multiple transmissions at the same time in order to prevent interference. This paper adopts the opposite approach; it encourages ...

Katti, Sachin

2007-02-23T23:59:59.000Z

67

Data acquisition scheduling for wireless sensors networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks have been increasingly studied by industry and academic institutions due to their potential application in environmental and geothermal monitoring, security enhancement among others. Such technology would play an important role ...

Carlos Gamboa / Thomas Robertazzi

2008-01-01T23:59:59.000Z

68

Cooperative caching in wireless multimedia sensor networks  

Science Conference Proceedings (OSTI)

The recent advances in miniaturization and the creation of low-power circuits, combined with small-sized batteries have made the development of wireless sensor networks a working reality. Lately, the production of cheap CMOS cameras and microphones gave ...

Nikos Dimokas; Dimitrios Katsaros; Yannis Manolopoulos

2007-08-01T23:59:59.000Z

69

Maximizing degrees of freedom in wireless networks  

E-Print Network (OSTI)

We consider communication from a single source to a single destination in a wireless network with fading. Both source and destination have multiple antennas. The information reaches the destination through a sequence of ...

Borade, Shashibhushan Prataprao, 1981-

2004-01-01T23:59:59.000Z

70

Intelligent Lighting System Using Wireless Sensor Networks  

E-Print Network (OSTI)

This paper examines the use of Wireless Sensor Networks interfaced with light fittings to allow for daylight substitution techniques to reduce energy usage in existing buildings. This creates a wire free system for existing buildings with minimal disruption and cost.

Kumaar, A A Nippun; TSB, Sudarshan; 10.5121/ijasuc.2010.1402

2011-01-01T23:59:59.000Z

71

Clear channel assessment in wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks are a rising commodity that demonstrate merit in the research domain due to their versatile nature. While powerful and feature-laden, these systems also require careful configuration for optimal packet transmission. This experiment ...

J. Collin Engstrom; Chase Gray

2008-03-01T23:59:59.000Z

72

Intrusion detection and monitoring for wireless networks.  

SciTech Connect

Wireless computer networks are increasing exponentially around the world. They are being implemented in both the unlicensed radio frequency (RF) spectrum (IEEE 802.11a/b/g) and the licensed spectrum (e.g., Firetide [1] and Motorola Canopy [2]). Wireless networks operating in the unlicensed spectrum are by far the most popular wireless computer networks in existence. The open (i.e., proprietary) nature of the IEEE 802.11 protocols and the availability of ''free'' RF spectrum have encouraged many producers of enterprise and common off-the-shelf (COTS) computer networking equipment to jump into the wireless arena. Competition between these companies has driven down the price of 802.11 wireless networking equipment and has improved user experiences with such equipment. The end result has been an increased adoption of the equipment by businesses and consumers, the establishment of the Wi-Fi Alliance [3], and widespread use of the Alliance's ''Wi-Fi'' moniker to describe these networks. Consumers use 802.11 equipment at home to reduce the burden of running wires in existing construction, facilitate the sharing of broadband Internet services with roommates or neighbors, and increase their range of ''connectedness''. Private businesses and government entities (at all levels) are deploying wireless networks to reduce wiring costs, increase employee mobility, enable non-employees to access the Internet, and create an added revenue stream to their existing business models (coffee houses, airports, hotels, etc.). Municipalities (Philadelphia; San Francisco; Grand Haven, MI) are deploying wireless networks so they can bring broadband Internet access to places lacking such access; offer limited-speed broadband access to impoverished communities; offer broadband in places, such as marinas and state parks, that are passed over by traditional broadband providers; and provide themselves with higher quality, more complete network coverage for use by emergency responders and other municipal agencies. In short, these Wi-Fi networks are being deployed everywhere. Much thought has been and is being put into evaluating cost-benefit analyses of wired vs. wireless networks and issues such as how to effectively cover an office building or municipality, how to efficiently manage a large network of wireless access points (APs), and how to save money by replacing an Internet service provider (ISP) with 802.11 technology. In comparison, very little thought and money are being focused on wireless security and monitoring for security purposes.

Thomas, Eric D.; Van Randwyk, Jamie A.; Lee, Erik J.; Stephano, Amanda (Indiana University); Tabriz, Parisa (University of Illinois at Urbana-Champaign); Pelon, Kristen (Cedarville University); McCoy, Damon (University of Colorado, Boulder); Lodato, Mark (Lafayette College); Hemingway, Franklin (University of New Mexico); Custer, Ryan P.; Averin, Dimitry (Polytechnic University); Franklin, Jason (Carnegie Mellon University); Kilman, Dominique Marie

2005-11-01T23:59:59.000Z

73

Network Coding based Information Security in Multi-hop Wireless Networks.  

E-Print Network (OSTI)

??Multi-hop Wireless Networks (MWNs) represent a class of networks where messages are forwarded through multiple hops of wireless transmission. Applications of this newly emerging communication… (more)

Fan, Yanfei

2010-01-01T23:59:59.000Z

74

Traffic Management and Net Neutrality in Wireless Networks  

E-Print Network (OSTI)

with desired network operation in wireless networks than inwireless devices have a greater ability to negatively interfere with desired network operation

Jordan, Scott

2011-01-01T23:59:59.000Z

75

Why Mobile Wireless Carriers Share Networks and Services Provisioning  

Science Conference Proceedings (OSTI)

This paper provides a theory that empirically examines why mobile wireless carriers share the costs of building networks and provisioning wireless services. Of the cost drivers of network operators, the most influential on the industry's dynamics are ... Keywords: Active and Passive Infrastructure, Backhaul, Coverage, Network Sharing, Next-Generation Networks, Spectrum, Wireless Services Provisioning

Hemant K. Sabat

2010-07-01T23:59:59.000Z

76

Realizing and benchmarking broadcast algorithms in wireless mesh networks  

Science Conference Proceedings (OSTI)

Broadcasting by flooding causes the broadcast storm problem in multi-hop wireless networks. This problem becomes more likely in a wireless mesh network (WMN) because WMNs can bridge wired LANs, increasing broadcast traffic and collision probability. ... Keywords: 802.11s, Broadcast algorithm, Mesh networks, Multi-hop wireless networks, WMN

Ying-Dar Lin; Shun-Lee Chang; Shi-Hung Tao; Jui-Hung Yeh

2011-07-01T23:59:59.000Z

77

A Uniform Balancing Energy Routing Protocol for Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

In wireless sensor network, the power supply is, generally, a non-renewable battery. Consequently, energy effectiveness is a crucial factor. To maximize the battery life and therefore, the duration of network service, a robust wireless communication ... Keywords: Ad-hoc networks, Energy balancing, Energy efficiency, Sensor networks, Wireless communications

Ouadoudi Zytoune; Mohamed El Aroussi; Driss Aboutajdine

2010-10-01T23:59:59.000Z

78

Trust-Assisted Handover Approach in Hybrid Wireless Networks  

Science Conference Proceedings (OSTI)

In Next-Generation (NG) hybrid wireless networks, Mobile-Controlled Handover (MCHO) is expected to be employed as the handover control mechanism, in contrast to Network-Controlled Handover (NCHO) used in homogeneous wireless networks. As more independent ... Keywords: Cross-layer handover, Hybrid wireless networks, Multi-operator, Security-enhanced QoS, Service roaming, Trust relation

Mo Li; Kumbesan Sandrasegaran; Tracy Tung

2010-02-01T23:59:59.000Z

79

The use of MIMO technologies in wireless communication networks  

Science Conference Proceedings (OSTI)

This paper provides a detailed picture on computer networks and especially on wireless networks, focusing on specific characteristics of wireless systems. By using MIMO technology (Multiple Input Multiple Output), network logon ca be realized at distances ... Keywords: IEEE standards, MIMO technology, routers, wireless networks

Marius-Constantin O. S. Popescu; Nikos E. Mastorakis

2009-12-01T23:59:59.000Z

80

Deploying a Wireless Sensor Network on an Active Volcano  

Science Conference Proceedings (OSTI)

Augmenting heavy and power-hungry data collection equipment with lighter, smaller wireless sensor network nodes leads to faster, larger deployments. Arrays comprising dozens of wireless sensor nodes are now possible, allowing scientific studies that ... Keywords: wireless sensor networks, sensor network applications, sensor network nodes, volcano research

Geoffrey Werner-Allen; Konrad Lorincz; Matt Welsh; Omar Marcillo; Jeff Johnson; Mario Ruiz; Jonathan Lees

2006-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

A virtual infrastructure for large-scale wireless sensor networks  

Science Conference Proceedings (OSTI)

The primary goal of a wireless sensor network is to collect useful information from the network. Most wireless sensor networks are assumed that the number of nodes are very large and they should operate with confined resources. Consequently it is important ... Keywords: Data collection, Railroad, Topology, Wireless sensor networks

Jeong-Hun Shin; Daeyeon Park

2007-10-01T23:59:59.000Z

82

MAC protocols over wireless mesh networks: problems and perspective  

Science Conference Proceedings (OSTI)

The wireless mesh network (WMN) has been an emerging technology in recent years. Because the transmission medium used in networking backhaul access points (APs) is radio, the wireless mesh network is not only easy and cost effective in deployment, but ... Keywords: Coordinated distributed scheduling, IEEE 802.11, IEEE 802.16, MAC, TDMA, Wireless mesh networks (WMNs)

V. Loscr?

2008-03-01T23:59:59.000Z

83

Flexible network wireless transceiver and flexible network telemetry transceiver  

DOE Patents (OSTI)

A transceiver for facilitating two-way wireless communication between a baseband application and other nodes in a wireless network, wherein the transceiver provides baseband communication networking and necessary configuration and control functions along with transmitter, receiver, and antenna functions to enable the wireless communication. More specifically, the transceiver provides a long-range wireless duplex communication node or channel between the baseband application, which is associated with a mobile or fixed space, air, water, or ground vehicle or other platform, and other nodes in the wireless network or grid. The transceiver broadly comprises a communication processor; a flexible telemetry transceiver including a receiver and a transmitter; a power conversion and regulation mechanism; a diplexer; and a phased array antenna system, wherein these various components and certain subcomponents thereof may be separately enclosed and distributable relative to the other components and subcomponents.

Brown, Kenneth D. (Grain Valley, MO)

2008-08-05T23:59:59.000Z

84

Automatic decentralized clustering for wireless sensor networks  

Science Conference Proceedings (OSTI)

We propose a decentralized algorithm for organizing an ad hoc sensor network into clusters. Each sensor uses a random waiting timer and local criteria to determine whether to form a new cluster or to join a current cluster. The algorithm operates without ... Keywords: clustering algorithm, random waiting timer, wireless sensor networks

Chih-Yu Wen; William A. Sethares

2005-10-01T23:59:59.000Z

85

Dual wakeup design for wireless sensor networks  

Science Conference Proceedings (OSTI)

Energy is often identified as the single most important resource in wireless battery-powered sensor networks. While current wakeup schemes in the literature promise to conserve energy in such networks, they apply several assumptions that may not be always ... Keywords: Cyclic block design, Dual wakeup design, Energy conservation, Lonely node, Time-tolerance sensing

Y. F. Wong; L. H. Ngoh; Winston K. G. Seah; Wai-Choong Wong

2009-01-01T23:59:59.000Z

86

An energy efficient RF transceiver for wireless microsensor networks  

E-Print Network (OSTI)

A wireless microsensor network consists of a group of sensor nodes that are deployed remotely and used to relay sensing data to the end-user. Due to their remote deployment, large scale wireless sensor networks require a ...

Daly, Denis Clarke

2005-01-01T23:59:59.000Z

87

Power Scheduling for Multi-Hop Wireless Networks  

E-Print Network (OSTI)

wireless communica- tions: Scaling laws and optimal operation,”wireless networks are particularly useful for first responders for disaster relief, and military operationswireless network is particularly useful for first responders for disaster relief, and military operations

Yu, Yuan

2009-01-01T23:59:59.000Z

88

An efficient synchronisation protocol for wireless sensor network  

Science Conference Proceedings (OSTI)

Time synchronisation is a critical topic in wireless sensor networks for its wide applications, such as data fusion, TDMA scheduling and cooperated sleeping, etc. In this paper, we present an Accurate Time Synchronisation (ATS) protocol based on ... Keywords: WSNs, drift, linear least squares, offset, time synchronisation, wireless networks, wireless sensor networks

Liusheng Huang; Hongli Xu; Yingyu Wan; Junmin Wu; Hong Li

2007-04-01T23:59:59.000Z

89

Hierarchical distributed data classification in wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks promise an unprecedented opportunity to monitor physical environments via inexpensive wireless embedded devices. Given the sheer amount of sensed data, efficient classification of them becomes a critical task in many sensor network ... Keywords: C4.5, Classification, Decision tree, Wireless sensor network

Xu Cheng; Ji Xu; Jian Pei; Jiangchuan Liu

2010-07-01T23:59:59.000Z

90

Coordination in wireless sensor-actuator networks: A survey  

Science Conference Proceedings (OSTI)

Wireless Sensor-Actuator Networks (WSANs) have a myriad of applications, ranging from pacifying bulls to controlling light intensity in homes automatically. An important aspect of WSANs is coordination. Unlike conventional Wireless Sensor Networks (WSNs), ... Keywords: Actuators, Coordination, Energy efficiency, Wireless sensor and actuator networks

Hamidreza Salarian; Kwan-Wu Chin; Fazel Naghdy

2012-07-01T23:59:59.000Z

91

Using LED Lighting for Ubiquitous Indoor Wireless Networking  

E-Print Network (OSTI)

Abstract—Wireless networking is currently dominated by radio frequency (RF) techniques. However, the soon-to-be ubiquity of LED-based lighting motivated by significant energy savings provides an opportunistic deployment of widespread free-space optical (FSO) communications. LEDbased network transceivers have a variety of competitive advantages over RF including high bandwidth density, security, energy consumption, and aesthetics. They also use a highly reusable unregulated part of the spectrum (visible light). In this paper we describe results from a pilot project to demonstrate the viability of an optical free-space visible light transceiver as a basis for indoor wireless networking. Inexpensive, commercial, off-the shelf LEDs and photodiodes we used to construct two prototypes; a simplex channel as expected as a component of an asymmetric/hybrid RF-FSO system, and a full-duplex channel demonstrating the ability to isolate multiple channels. On— off keying (OOK) was applied without observable flicker in the target modulation ranges. Results indicate the viability of creating inexpensive FSO transceivers that might be embedded in commercial lighting products to support ceiling-to-floor distances of approximately 3m. Index Terms—Wireless networking, indoor communications, free-space optical communications, visible light LED, modulation, OOK, FSO. 1 I.

T. D. C. Little; P. Dib; K. Shah; N. Barraford; B. Gallagher

2008-01-01T23:59:59.000Z

92

Comparative performance study of ADMR and ODMRP in the context of wireless LANs and wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless LANs (WLANs) and Wireless Sensor Networks (WSNs) are two large groups of networks that have well established application ranges. Despite the fact that they address very distinctive groups of devices and have clearly differentiated wireless interfaces, ... Keywords: medium access control mechanisms, performance evaluation, wireless LANs, wireless sensor networks

Radosveta Sokullu; Ozlem Karaca

2008-05-01T23:59:59.000Z

93

Large wireless networks : fundamental limits and design issues  

E-Print Network (OSTI)

wireless networks: fundamental limits and design issues Awireless networks: fundamental limits and design issues bythesis we demonstrate how fundamental questions arising in

Minero, Paolo

2010-01-01T23:59:59.000Z

94

Dynamic priority scheduling-based MAC for wireless sensor networks  

Science Conference Proceedings (OSTI)

In this paper, one of the most important issues supporting real-time QoS in wireless sensor networks is discussed, which is fundamentally a challenging problem. A novel MAC protocol based on dynamic priority scheduling is proposed for wireless sensor ... Keywords: MAC, Motes MICA 2, QoS, WSNs, dynamic priority scheduling, medium access control, quality of service, wireless networks, wireless sensor networks

Jiming Chen; Youxian Sun

2007-04-01T23:59:59.000Z

95

Self-destruction procedure for mesh wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSN) are rapidly expanding their attractiveness in both military and civilian applications, imposing the need for effective security strategies/mechanisms. Since sensor networks in many circumstances operate with sensitive data ... Keywords: mesh networks, network lifecycle, security, self-destruction, wireless sensor networks

Madalin Plastoi; Daniel-Ioan Curiac; Iosif Gut; Constantin Volosencu

2009-09-01T23:59:59.000Z

96

How Evolving Network Access and Network Management Technologies are Redefining the Competitive Wireless Markets  

Science Conference Proceedings (OSTI)

This paper examines some of the key problems users encounter when accessing current generation wireless networks. Using a case study of a hypothetical user, the authors explore the emerging services and the new broadband wireless network technologies ... Keywords: Autonomic Communications, Broadband Wireless Access Technologies, Cognitive Wireless Networks, Short and Long-Term Service Contracts, Two-Sided Markets, User-Centric Services

Fernando Beltrán; Jairo A. Gutiérrez; José Luis Melús

2011-07-01T23:59:59.000Z

97

PIPENETa wireless sensor network for pipeline monitoring  

Science Conference Proceedings (OSTI)

US water utilities are faced with mounting operational and maintenance costs as a result of aging pipeline infrastructures. Leaks and ruptures in water supply pipelines and blockages and overflow events in sewer collectors cost millions of dollars a ... Keywords: Intel mote platforms, pipeline monitoring, water supply systems, wireless sensor networks

Ivan Stoianov; Lama Nachman; Sam Madden; Timur Tokmouline

2007-04-01T23:59:59.000Z

98

Multiagent Coordination in Microgrids via Wireless Networks  

E-Print Network (OSTI)

Multiagent Coordination in Microgrids via Wireless Networks Hao Liang, BBCR Group, University of Waterloo Abstract The future smart grid is expected to be an integration of intelligent microgrids featured to facilitate pervasive microgrid monitoring and control at a high flexibility and low deployment cost. In order

Zhuang, Weihua

99

Minimum-outage broadcast in wireless networks with fading channels  

Science Conference Proceedings (OSTI)

We consider the problem of cooperative broadcasting for minimum outage in wireless networks. We consider wireless multihop broadcast as a set of transmitters that transmit in a certain order. The receiving nodes are able to combine all the previous transmissions ... Keywords: broadcast, multicast, outage, wireless networks

Tolga Girici; Gulizar Duygu Kurt

2010-07-01T23:59:59.000Z

100

Security in Wireless Data Networks: A Survey Paper  

E-Print Network (OSTI)

Security in Wireless Data Networks: A Survey Paper Abdel-Karim R. Al Tamimi abdelkarim.tamimi@gmail.com Abstract Both security and wireless communication will remain an interesting subject for years to come jeopardizing the communicated content. This paper illustrates the key concepts of security, wireless networks

Jain, Raj

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

A topology-independent scheduling scheme for wireless mesh networks  

Science Conference Proceedings (OSTI)

To meet the needs of wireless broadband access, the IEEE 802.16 protocol for wireless metropolitan networks had been recently standardized. The medium access control (MAC) layer of the IEEE 802.16 has point-to-multipoint (PMP) mode and mesh mode. Previous ... Keywords: 802.16, MAC, TDMA, mesh networks, scheduling sheme, wireless

V. Loscri

2007-10-01T23:59:59.000Z

102

Connectivity, throughput, and end-to-end latency in infrastructureless wireless Networks with beamforming-enabled devices  

E-Print Network (OSTI)

Infrastructureless wireless networks are an important class of wireless networks best fitted to operational situations with temporary, localized demand for communication ability. These networks are composed of wireless ...

Carey, Matthew F. (Matthew Francis)

2011-01-01T23:59:59.000Z

103

Experimental Analysis of Heterogeneous Wireless Networks  

E-Print Network (OSTI)

Packet loss and delay in Internet degrade the quality of requested services like VoIP (Voice over IP) or Video Streaming. In novel network scenarios where wired and wireless connections are melted together, a real measure of these parameters is fundamental in a planning process of new services over novel network infrastructures. Nowadays networks are heterogeneous in terms of access network technologies (wired LAN Ethernet 10/100/1000, Wireless LAN - 802.11a, 802.11b, 802.11g -, GPRS, UMTS, GSM, Bluetooth, ...), end-users' devices (workstation, PC desktop, Laptop/Notebook, PDA, Advanced Mobile Phone, ...) and finally operating systems (Unix, Linux, Win 98/NT/2000/XP, Win CE, Linux Familiar, OS Embedded, ...). In this work we provide a heterogeneous network performance characterization with respect to delay and throughput in UDP and TCP environments. In order to determine our results we use an innovative traffic generator named D-ITG (Distributed Internet Traffic Generator). Results presented in this paper can be used as performance references for development of wireless communication applications over multiservice and heterogeneous networks.

Giulio Iannello; Antonio Pescape; Giorgio Ventre; Luca Vollero

2004-01-01T23:59:59.000Z

104

Applying physical-layer network coding in wireless networks  

Science Conference Proceedings (OSTI)

A main distinguishing feature of a wireless network compared with a wired network is its broadcast nature, in which the signal transmitted by a node may reach several other nodes, and a node may receive signals from several other nodes, simultaneously. ...

Shengli Zhang; Soung Chang Liew

2010-01-01T23:59:59.000Z

105

TDM MAC protocol design and implementation for wireless mesh networks  

Science Conference Proceedings (OSTI)

We present the design, implementation, and evaluation of a Time Division Multiplex (TDM) MAC protocol for multi-hop wireless mesh networks using a programmable wireless platform. Extensive research has been devoted to optimal scheduling algorithms for ...

Dimitrios Koutsonikolas; Theodoros Salonidis; Henrik Lundgren; Pascal LeGuyadec; Y. Charlie Hu; Irfan Sheriff

2008-12-01T23:59:59.000Z

106

Wireless home automation networks: a survey of architectures and technologies  

Science Conference Proceedings (OSTI)

Wireless home automation networks comprise wireless embedded sensors and actuators that enable monitoring and control applications for home user comfort and efficient home management. This article surveys the main current and emerging solutions that ...

Carles Gomez; Josep Paradells

2010-06-01T23:59:59.000Z

107

Wireless SensorWireless Sensor NetworkNetwork  

E-Print Network (OSTI)

consumption related to ICT varying from 2% to 10% of the worldwide power consumption [5]. It is worth consumption in network by 2015 [10]. In the current telecommunications networks, the vast majority, modems, line cards, etc.), a direct estimation of network equipment power consumption is notoriously

Kabara, Joseph

108

Vampire Attacks: Draining Life from Wireless Ad Hoc Sensor Networks  

Science Conference Proceedings (OSTI)

Ad hoc low-power wireless networks are an exciting research direction in sensing and pervasive computing. Prior security work in this area has focused primarily on denial of communication at the routing or medium access control levels. This paper explores ... Keywords: Denial of service, security, routing, ad hoc networks, sensor networks, wireless networks

Eugene Y. Vasserman; Nicholas Hopper

2013-02-01T23:59:59.000Z

109

A middleware-based approach for heterogeneous wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSN) are networked embedded systems that use small size devices with some processing and short-range radio communication capabilities for monitoring and controlling systems and environments. However, languages and IDE (Integrated ... Keywords: heterogeneous networks, middleware, wireless sensor networks

F. Graziosi; L. Pomante; D. Pacifico

2008-07-01T23:59:59.000Z

110

Neighbor discovery in wireless networks and the coupon collector's problem  

Science Conference Proceedings (OSTI)

Neighbor discovery is one of the first steps in the initialization of a wireless ad hoc network. In this paper, we design and analyze practical algorithms for neighbor discovery in wireless networks. We first consider an ALOHA-like neighbor discovery ... Keywords: ad hoc networks, initialization, neighbor discovery, randomized algorithms, sensor networks

Sudarshan Vasudevan; Donald Towsley; Dennis Goeckel; Ramin Khalili

2009-09-01T23:59:59.000Z

111

A lightweight approach to mobile multicasting in Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Wireless Sensor Networks (WSN) are envisioned to have significant impacts on many applications. In scenarios such as first responder systems and administrative applications, data sinks are frequently being mobile. In this research, we study one-to-many ... Keywords: WSN, ad hoc computing, ad hoc networks, mobile multicasting, pervasive computing, sensor networks, simulation, target tracking, ubiquitous computing, wireless networks

Qing Ye; Liang Cheng

2006-12-01T23:59:59.000Z

112

Resource-aware speculative prefetching in wireless networks  

Science Conference Proceedings (OSTI)

Mobile users connected to wireless networks expect performance comparable to those on wired networks for interactive multimedia applications. Satisfying Quality of Service (QoS) requirements for such applications in wireless networks is a challenging ... Keywords: bandwidth, caching, compound request, network load, speculative prefetching

N. J. Tuah; M. Kumar; S. Venkatesh

2003-01-01T23:59:59.000Z

113

Review: From wireless sensor networks towards cyber physical systems  

Science Conference Proceedings (OSTI)

In the past two decades, a lot of research activities have been dedicated to the fields of mobile ad hoc network (MANET) and wireless sensor networks (WSN). More recently, the cyber physical system (CPS) has emerged as a promising direction to enrich ... Keywords: Cyber physical system, Internet technology, Mobile ad hoc network, Pervasive computing, Sensing and actuation, Wireless sensor network

Fang-Jing Wu; Yu-Fen Kao; Yu-Chee Tseng

2011-08-01T23:59:59.000Z

114

Optimized relay node placement for connecting disjoint wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSNs) often operate in a harsh environment such as battlefield and may suffer simultaneous failure of multiple sensors that cause the network to become partitioned into disjoint segments. In order to prevent the application ... Keywords: Connectivity restoration, Network partitioning, Relay node placement, Wireless sensor networks

Sookyoung Lee; Mohamed Younis

2012-08-01T23:59:59.000Z

115

An energy efficient clustering protocol for routing in Wireless Sensor Network  

Science Conference Proceedings (OSTI)

In Wireless Sensor Network (WSN), the power supply is generally a non-renewable battery, consequently, energy effectiveness is a crucial factor. To maximise the battery life and therefore the duration of network service, a robust wireless ... Keywords: WSNs, battery life, dynamic clustering, energy efficiency, energy efficient clustering, network lifetime, simulation, wireless communications, wireless networks, wireless sensor networks

Ouadoudi Zytoune; Mohamed El Aroussi; Driss Aboutajdine

2011-12-01T23:59:59.000Z

116

Iterative Collision Resolution in Wireless Networks  

E-Print Network (OSTI)

With the growing popularity of smart phones and tablets, development of multimedia applications is on the rise. Speedy transmission of this massive amount information is already pushing the limits of the capacity of wireless networks, and in upcoming years wireless data traffic is projected to continue increasing dramatically. Advances in wireless network throughput are necessary to keep up with society’s data demands. In an uncoordinated wireless communications system, transmissions collide and interfere as multiple users transmit data to a central receiver. Slotted-ALOHA, the conventional method that schedules user transmissions, has only 37% throughput efficiency. However, theoretical results in recent studies suggest that scheduling transmissions over a number of random, fixed timeslots and employing iterative collision resolution techniques achieves optimal throughput efficiency of approximately 100%. This research considers how real-world conditions affect these theoretical results. A MATLAB model was developed create random graphs, representing users transmitting packets over such timeslots, and the packets were resolved by this method. This model was simulated extensively, representing networks of up to 10,000 users over 10,000 to 15,000 timeslots, and the number of packets resolved in each iteration was measured. These simulations have generated empirical data that backs up the theoretical claim. The distribution of the number of packets resolved also led to modifications of the current model to increase the percentage of packets resolved in each iteration. Furthermore, by investigating low density parity check coding techniques, other modifications to the current model can optimize the throughput over several consecutive transmissions where unresolved packets are resent with higher probability of recovery. These results demonstrate the potential of this method in handling uncoordinated transmissions in communications systems, even in the presence of finite conditions. This suggests that this method could eventually be employed in actual wireless systems.

Stuckman, Katherine Christine

2013-05-01T23:59:59.000Z

117

Techniques for mitigating congestion in wireless sensor networks  

E-Print Network (OSTI)

Network congestion occurs when offered traffic load exceeds available capacity at any point in a network. In wireless sensor networks, congestion causes overall channel quality to degrade and loss rates to rise, leads to ...

Hull, Bret Warren, 1980-

2005-01-01T23:59:59.000Z

118

Fundamental Tradeoffs on Green Wireless Networks  

E-Print Network (OSTI)

Traditional design of mobile wireless networks mainly focuses on ubiquitous access and large capacity. However, as energy saving and environmental protection become a global demand and inevitable trend, wireless researchers and engineers need to shift their focus to energy-efficiency oriented design, that is, green radio. In this paper, we propose a framework for green radio research and integrate the fundamental issues that are currently scattered. The skeleton of the framework consists of four fundamental tradeoffs: deployment efficiency - energy efficiency tradeoff, spectrum efficiency - energy efficiency tradeoff, bandwidth - power tradeoff, and delay - power tradeoff. With the help of the four fundamental tradeoffs, we demonstrate that key network performance/cost indicators are all stringed together.

Chen, Yan; Xu, Shugong; Li, Geoffrey Ye

2011-01-01T23:59:59.000Z

119

A wireless sensor network For structural monitoring  

Science Conference Proceedings (OSTI)

Structural monitoring---the collection and analysis of structural response to ambient or forced excitation--is an important application of networked embedded sensing with significant commercial potential. The first generation of sensor networks for structural ... Keywords: Wisden, sensor network, structural health monitoring

Ning Xu; Sumit Rangwala; Krishna Kant Chintalapudi; Deepak Ganesan; Alan Broad; Ramesh Govindan; Deborah Estrin

2004-11-01T23:59:59.000Z

120

Small-world effects in wireless agent sensor networks  

Science Conference Proceedings (OSTI)

We describe a model for analysing the coverage graph from physical placement of mobile agents or sensor devices to improve coverage, fault tolerance and network lifetime. The planar graph for the devices is augmented by small-world network 'short-cuts'; ... Keywords: WSNs, clustering algorithms, connectivity graphs, fault tolerance, mobile agents, mobile sensors, modelling, network coverage, network lifetime, optimal coverage, percolation, scaling, small-world networks, wireless agents, wireless sensor networks

K. A. Hawick; H. A. James

2010-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Minimum power allocation for cooperative routing in multihop wireless networks  

Science Conference Proceedings (OSTI)

Due to the limited energy supplies of nodes, in many applications like wireless sensor networks, energy-efficiency is crucial for extending the lifetime of these networks. We study the routing problem for multihop wireless ad hoc networks based on cooperative ...

Behrouz Maham; Are Hjørungnes

2009-03-01T23:59:59.000Z

122

Technology Challenges in the Development of Wireless Personal Area Networks  

Science Conference Proceedings (OSTI)

Wireless personal area networks (WPANs) will be major components of the heterogeneous communication environment of the future. The devices in a WPAN must be low cost and operate for a long time from a battery. As a consequence, they pose demanding ... Keywords: 4G networks, packaging technology, processing technology, wireless personal area networks

Marc Engels

2002-08-01T23:59:59.000Z

123

Optimal placement of mesh points in wireless mesh networks  

Science Conference Proceedings (OSTI)

A strategic placement of mesh points (MPs) in a Wireless Mesh Network (WMN) is essential to maximize the throughput of the network. In this paper, we address the problem of MPs placement for throughput optimization in WMN with consideration of routing ... Keywords: gateway placement, throughput optimization, wireless mesh network

Suk Yu Hui; Kai Hau Yeung; Kin Yeung Wong

2008-05-01T23:59:59.000Z

124

Energy-efficient broadcasting in all-wireless networks  

Science Conference Proceedings (OSTI)

In all-wireless networks, minimizing energy consumption is crucial as in most cases the nodes are battery-operated. We focus on the problem of power-optimal broadcast, for which it is well known that the broadcast nature of radio transmissions can be ... Keywords: approximation algorithms, complexity theory, energy efficiency, minimum-energy networks, wireless ad hoc networks

Mario ?agalj; Jean-Pierre Hubaux; Christian C. Enz

2005-01-01T23:59:59.000Z

125

A survey on clustering algorithms for wireless sensor networks  

Science Conference Proceedings (OSTI)

The past few years have witnessed increased interest in the potential use of wireless sensor networks (WSNs) in applications such as disaster management, combat field reconnaissance, border protection and security surveillance. Sensors in these applications ... Keywords: Clustering algorithms, Energy aware design, Network architecture, Scalability, Wireless sensor networks

Ameer Ahmed Abbasi; Mohamed Younis

2007-10-01T23:59:59.000Z

126

Maximizing Battery Life Routing in Wireless Ad Hoc Networks  

E-Print Network (OSTI)

Maximizing Battery Life Routing in Wireless Ad Hoc Networks Weifa Liang Department of Computer Abstract--Most wireless ad hoc networks consist of mobile devices which operate on batteries. Power con, for an ad hoc network consisting of the same type of battery mobile nodes, two approximation algorithms

Liang, Weifa

127

Energy Distribution Control in Wireless Sensor Networks Through Range Optimization  

E-Print Network (OSTI)

Energy Distribution Control in Wireless Sensor Networks Through Range Optimization M.Sarper Gokturk a location-based routing framework to control the energy distribution in a network where transmission ranges--A major objective in wireless sensor networks is to find optimum routing strategies for energy efficient

Yanikoglu, Berrin

128

Data aggregation in wireless sensor networks using ant colony algorithm  

Science Conference Proceedings (OSTI)

Data aggregation is important in energy constraint wireless sensor networks which exploits correlated sensing data and aggregates at the intermediate nodes to reduce the number of messages exchanged network. This paper considers the problem of constructing ... Keywords: Ant colony, Data aggregation, Wireless sensor networks

Wen-Hwa Liao; Yucheng Kao; Chien-Ming Fan

2008-11-01T23:59:59.000Z

129

Dynamic data compression in multi-hop wireless networks  

Science Conference Proceedings (OSTI)

Data compression can save energy and increase network capacity in wireless sensor networks. However, the decision of whether and when to compress data can depend upon platform hardware, topology, wireless channel conditions, and application data rates. ... Keywords: energy efficiency, stochatic network optimization

Abhishek B. Sharma; Leana Golubchik; Ramesh Govindan; Michael J. Neely

2009-06-01T23:59:59.000Z

130

Neighbor Selection Game in Wireless Ad Hoc Networks  

Science Conference Proceedings (OSTI)

In wireless ad hoc networks, there is no infrastructure to enforce cooperation between nodes. As a result, nodes may act selfishly when running network protocols to conserve their energy resources as much as possible. In this paper, we consider the "neighbor ... Keywords: Energy efficiency, Game theory, Neighbor selection, Selfish nodes, Wireless ad hoc networks

Sajjad Zarifzadeh; Nasser Yazdani

2013-05-01T23:59:59.000Z

131

Modeling environmental effects on directionality in wireless networks  

Science Conference Proceedings (OSTI)

One method for improving wireless network throughput involves using directional antennas to increase signal gain and/or decrease interference. The physical layer models used in current networking simulators only minimally address the interaction of directional ... Keywords: Antenna, Directional, Environment, Model, Networking, Wireless

Eric Anderson; Caleb Phillips; Douglas Sicker; Dirk Grunwald

2011-06-01T23:59:59.000Z

132

A study of reconnecting the partitioned wireless sensor networks  

Science Conference Proceedings (OSTI)

Most wireless sensor networks (WSN) researches assume that the network is connected and there is always a path connected by wireless links between a source and a destination. In this paper, we argue that network partitioning is not an uncommon phenomenon ...

Qing Ye; Liang Cheng

2005-04-01T23:59:59.000Z

133

Radio link quality estimation in wireless sensor networks: A survey  

Science Conference Proceedings (OSTI)

Radio link quality estimation in Wireless Sensor Networks (WSNs) has a fundamental impact on the network performance and also affects the design of higher-layer protocols. Therefore, for about a decade, it has been attracting a vast array of research ... Keywords: Link quality estimation, link characteristics, low-power links, wireless sensor networks

Nouha Baccour; Anis Koubâa; Luca Mottola; Marco Antonio Zúñiga; Habib Youssef; Carlo Alberto Boano; Mário Alves

2012-09-01T23:59:59.000Z

134

Adaptive design optimization of wireless sensor networks using genetic algorithms  

Science Conference Proceedings (OSTI)

We present a multi-objective optimization methodology for self-organizing, adaptive wireless sensor network design and energy management, taking into consideration application-specific requirements, communication constraints and energy-conservation characteristics. ... Keywords: Adaptive network design, Energy conservation, Genetic algorithms, Optimal design, Wireless sensor networks

Konstantinos P. Ferentinos; Theodore A. Tsiligiridis

2007-03-01T23:59:59.000Z

135

Wireless mesh network security: A traffic engineering management approach  

Science Conference Proceedings (OSTI)

The wireless mesh network (WMN) is an emerging multihop, heterogeneous, easily scalable and low cost network. The architecture of the WMN is a connectionless-oriented, mobile and dynamic traffic of routed packets. The mesh infrastructure environment ... Keywords: IPSec, MPLS, Security, Traffic engineering, VPN, Wireless mesh networks

Okechukwu E. Muogilim; Kok-Keong Loo; Richard Comley

2011-03-01T23:59:59.000Z

136

Distributed scheduling schemes for wireless mesh networks: A survey  

Science Conference Proceedings (OSTI)

An efficient scheduling scheme is a crucial part of Wireless Mesh Networks (WMNs)—an emerging communication infrastructure solution for autonomy, scalability, higher throughput, lower delay metrics, energy efficiency, and other service-level guarantees. ... Keywords: Wireless mesh networks, ad hoc networks, cyclic access, distributed scheduling schemes, pseudo-random access, random access

Kanthaiah Sivapragasam Vijayalayan, Aaron Harwood, Shanika Karunasekera

2013-10-01T23:59:59.000Z

137

Architectural framework for wireless mobile ad hoc networks (AF WMANETs)  

Science Conference Proceedings (OSTI)

WMANETs are more popular and successful in the marketplace of the future wireless technology as indicated by the increasing usage of Bluetooth and Wireless Local Area Networks (WLANs). To aid the application of WMANETs in any wireless environment, when ... Keywords: Computational viewpoint, Enterprise viewpoint, Information viewpoint, RM-ODP, Security, TINA, WMANETs

I. Almomani; M. Al-Akaidi; P. Reynolds; J. Ivins

2006-12-01T23:59:59.000Z

138

Tracking-history-based Sleeping Policies for Wireless Sensor Networks.  

E-Print Network (OSTI)

??A wireless sensor network can be used to track an object. Every sensor has limited energy and detecting range. In order to conserve energy, sensors… (more)

Gau, Ding-hau

2009-01-01T23:59:59.000Z

139

Radio channel modeling for mobile ad hoc wireless networks .  

E-Print Network (OSTI)

??The radio channel places fundamental limitations on the performance of mobile ad hoc wireless networks. In the mobile radio environment, fading due to multipath delay… (more)

Sng, Sin Hie

2004-01-01T23:59:59.000Z

140

Distributed Energy-Saving Algorithms for Wireless Networks.  

E-Print Network (OSTI)

??The rapid growth of wireless networks has led to increasing interest in designing new algorithms that can efficiently reduce the energy consumption of routers and… (more)

Zazo Ruiz, Javier

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Power-Rate-Distortion Analysis Of Wireless Visual Sensor Network.  

E-Print Network (OSTI)

??The emergence of low-cost and mature technologies in wireless communication, visual sensor devices, and digtial signal processing, facilitates the potential of wirelss sensor networks (WSN).… (more)

Shaw, William

2008-01-01T23:59:59.000Z

142

Modeling the Behavior of an Electronically Switchable Directional Antenna for Wireless Sensor Networks.  

E-Print Network (OSTI)

??Reducing power consumption is among the top concerns in Wireless Sensor Networks, as the lifetime of a Wireless Sensor Network depends on its power consumption.… (more)

Silase, Geletu

2011-01-01T23:59:59.000Z

143

Energy Management in Wireless Sensor Network Operations  

E-Print Network (OSTI)

In this dissertation, we develop and analyze effective energy management policies for wireless sensor networks in emerging applications. Existing methods in this area have primarily focused on energy conservation through the use of various communication techniques. However, in most applications of wireless sensor networks, savings in energy come at the expense of several performance parameters. Therefore it is necessary to manage energy consumption while being conscious of its effects on performance. In most cases, such energy-performance issues are specific to the nature of the application. Our research has been motivated by new techniques and applications where efficient energy-performance trade-off decisions are required. We primarily study the following trade-off cases: energy and node replacement costs (Case I), energy and delay (Case II), and energy and availability (Case III). We consider these trade-off situations separately in three distinct problem scenarios. In the first problem (Case I), we consider minimizing energy and node replacement costs in underwater wireless sensor networks for seismic monitoring application. In this case, we introduce mixed-integer programming (MIP) formulations based on a combined routing and node replacement policy approach and develop effective policies for large problem instances where our MIP models are intractable. In the second problem (Case II), we develop a Markov decision process (MDP) model to manage energy-delay trade-off in network coding which is a new energy-saving technique for wireless networks. Here we derive properties of the optimal policy and develop in- sights into other simple policies that are later shown to be efficient in particular situations. In the third problem (Case III), we consider an autonomous energy harvesting sensor network where nodes are turned off from time to time to operate in an “energy-neutral” manner. In this case, we use stochastic fluid-flow analysis to evaluate and analyze the availability of the sensor nodes under effective energy management policies. In each of the above problem cases, we develop analytical formulations, and derive and/or analyze policies that effectively manage the considered energy-performance trade-off. Overall, our analyses and solution methods make new contributions to both operations research and communication networking literature.

Mohapatra, Arupa Kumar

2013-08-01T23:59:59.000Z

144

A Survey of Attacks, Security Mechanisms and Challenges in Wireless Sensor Networks  

E-Print Network (OSTI)

Wireless Sensor networks (WSN) is an emerging technology and have great potential to be employed in critical situations like battlefields and commercial applications such as building, traffic surveillance, habitat monitoring and smart homes and many more scenarios. One of the major challenges wireless sensor networks face today is security. While the deployment of sensor nodes in an unattended environment makes the networks vulnerable to a variety of potential attacks, the inherent power and memory limitations of sensor nodes makes conventional security solutions unfeasible. The sensing technology combined with processing power and wireless communication makes it profitable for being exploited in great quantity in future. The wireless communication technology also acquires various types of security threats. This paper discusses a wide variety of attacks in WSN and their classification mechanisms and different securities available to handle them including the challenges faced.

Padmavathi, Dr G

2009-01-01T23:59:59.000Z

145

Review: A survey and tutorial of wireless relay network protocols based on network coding  

Science Conference Proceedings (OSTI)

Ever since the wireless relay network (RN) was introduced, it has led to the discovery of several new protocols, which have been consistently improved by researchers to overcome many constraints such as throughput, capacity bound, symbol error rate, ... Keywords: Relay networks, Wireless network coding, Wireless relay protocols

Ahmed Hassan Mohammed; Bin Dai; Benxiong Huang; Muhammad Azhar; Guan Xu; Peng Qin; Shui Yu

2013-03-01T23:59:59.000Z

146

Wireless Sensor Network for Advanced Energy Management Solutions  

Science Conference Proceedings (OSTI)

Eaton has developed an advanced energy management solution that has been deployed to several Industries of the Future (IoF) sites. This demonstrated energy savings and reduced unscheduled downtime through an improved means for performing predictive diagnostics and energy efficiency estimation. Eaton has developed a suite of online, continuous, and inferential algorithms that utilize motor current signature analysis (MCSA) and motor power signature analysis (MPSA) techniques to detect and predict the health condition and energy usage condition of motors and their connect loads. Eaton has also developed a hardware and software platform that provided a means to develop and test these advanced algorithms in the field. Results from lab validation and field trials have demonstrated that the developed advanced algorithms are able to detect motor and load inefficiency and performance degradation. Eaton investigated the performance of Wireless Sensor Networks (WSN) within various industrial facilities to understand concerns about topology and environmental conditions that have precluded broad adoption by the industry to date. A Wireless Link Assessment System (WLAS), was used to validate wireless performance under a variety of conditions. Results demonstrated that wireless networks can provide adequate performance in most facilities when properly specified and deployed. Customers from various IoF expressed interest in applying wireless more broadly for selected applications, but continue to prefer utilizing existing, wired field bus networks for most sensor based applications that will tie into their existing Computerized Motor Maintenance Systems (CMMS). As a result, wireless technology was de-emphasized within the project, and a greater focus placed on energy efficiency/predictive diagnostics. Commercially available wireless networks were only utilized in field test sites to facilitate collection of motor wellness information, and no wireless sensor network products were developed under this project. As an outgrowth of this program, Eaton developed a patented energy-optimizing drive control technology that is complementary to a traditional variable frequency drives (VFD) to enable significant energy savings for motors with variable torque applications, such as fans, pumps, and compressors. This technology provides an estimated energy saving of 2%-10% depending on the loading condition, in addition to the savings obtained from a traditional VFD. The combination of a VFD with the enhanced energy-optimizing controls will provide significant energy savings (10% to 70% depending on the load and duty cycle) for motors that are presently connected with across the line starters. It will also provide a more favorable return on investment (ROI), thus encouraging industries to adopt VFDs for more motors within their facilities. The patented technology is based on nonintrusive algorithms that estimate the instantaneous operating efficiency and motor speed and provide active energy-optimizing control of a motor, using only existing voltage and current sensors. This technology is currently being commercialized by Eaton’s Industrial Controls Division in their next generation motor control products. Due to the common nonintrusive and inferential nature of various algorithms, this same product can also include motor and equipment condition monitoring features, providing the facility owner additional information to improve process uptime and the associated energy savings. Calculations estimated potential energy savings of 261,397GWh/Yr ($15.7B/yr), through retrofitting energy-optimizing VFDs into existing facilities, and incorporating the solution into building equipment sold by original equipment manufacturers (OEMs) and installed by mechanical and electrical contractors. Utilizing MCSA and MPSA for predictive maintenance (PM) of motors and connected equipment reduces process downtime cost and the cost of wasted energy associated with shutting down and restarting the processes. Estimated savings vary depending on the industry segment and equi

Peter J. Theisen; Bin Lu, Charles J. Luebke

2009-09-23T23:59:59.000Z

147

Solar Energy Harvesting for Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

The commercially available sensor nodes are battery-driven devices. A number of nodes together constitute a network. As days proceed, the batteries used in the nodes lose their charge and subsequently get isolated from the network. Many energy harvesting ... Keywords: Energy Harvest, Recharging Circuitry, Batteries, Low Power Design, MICAz sensor nodes

P. T. V. Bhuvaneswari; R. Balakumar; V. Vaidehi; P. Balamuralidhar

2009-07-01T23:59:59.000Z

148

Time-bounded essential localization for wireless sensor networks  

Science Conference Proceedings (OSTI)

In many practical applications of wireless sensor networks, it is crucial to accomplish the localization of sensors within a given time bound. We find that the traditional definition of relative localization is inappropriate for evaluating its actual ... Keywords: essential localization, relative localization, time-bounded localization, wireless sensor networks

Wei Cheng; Nan Zhang; Xiuzhen Cheng; Min Song; Dechang Chen

2013-04-01T23:59:59.000Z

149

Fair Coalitions for Power-Aware Routing in Wireless Networks  

Science Conference Proceedings (OSTI)

Several power-aware routing schemes have been developed for wireless networks under the assumption that nodes are willing to sacrifice their power reserves in the interest of the network as a whole. But, in several applications of practical utility, ... Keywords: Wireless communication, algorithm design and analysis, energy-aware systems and routing.

Ratul K. Guha; Carl A. Gunter; Saswati Sarkar

2007-02-01T23:59:59.000Z

150

Location privacy and resilience in wireless sensor networks querying  

Science Conference Proceedings (OSTI)

Due to the wireless nature of communication in sensor networks, the communication patterns between sensors could be leaked regardless of the adoption of encryption mechanisms-those would just protect the message content. However, communication patterns ... Keywords: Location privacy, Probabilistic algorithm, Resiliency, Security, Wireless sensor networks

Roberto Di Pietro; Alexandre Viejo

2011-03-01T23:59:59.000Z

151

Wireless sensor networks: Enabling technology for ambient intelligence  

Science Conference Proceedings (OSTI)

Wireless sensor networks are one of the most rapidly evolving research and development fields for microelectronics. Their applications are countless, and the market potentials are huge. However, many technical hurdles have to be overcome to achieve a ... Keywords: Bio-sensors, Embedded systems, Energy efficiency, Wireless sensor networks

L. Benini; E. Farella; C. Guiducci

2006-12-01T23:59:59.000Z

152

Information fusion for wireless sensor networks: Methods, models, and classifications  

Science Conference Proceedings (OSTI)

Wireless sensor networks produce a large amount of data that needs to be processed, delivered, and assessed according to the application objectives. The way these data are manipulated by the sensor nodes is a fundamental issue. Information fusion arises ... Keywords: Information fusion, architectures and models, data aggregation, data fusion, wireless sensor networks

Eduardo F. Nakamura; Antonio A. F. Loureiro; Alejandro C. Frery

2007-09-01T23:59:59.000Z

153

WARPnet: clean slate research on deployed wireless networks  

Science Conference Proceedings (OSTI)

In this demo we present the Wireless Open-Access Research Platform for Networks (WARPnet), a research testbed aimed at performing experiments at the network level. The platform is designed to support not only conventional research areas but also new ... Keywords: control, measurement, warp, warpnet, wireless

Siddharth Gupta; Chris Hunter; Patrick Murphy; Ashutosh Sabharwal

2009-05-01T23:59:59.000Z

154

Self-Configuration for Wireless Local Area Networks  

Science Conference Proceedings (OSTI)

This paper concentrates on self-configuration in wireless local area networks (WLANs). As the growth of the stringent demand of heterogeneity and re-configurability in future wireless networks, the initial configuration is getting more and more complex, ... Keywords: Analytic hierarchy process, Grey relational analysis, Neighboring AP discovery, Self-configuration

Zhiyong Feng; Qixun Zhang; Dian Fan; Litao Liang; Ping Zhang

2010-03-01T23:59:59.000Z

155

Some comments on wireless sensor networks for natural hazards  

Science Conference Proceedings (OSTI)

Presently, the urgency of creating efficient system to tackle natural hazards such as tsunamis, earthquakes, landslides and floods to cite just a few, have originated that Wireless Sensor Networks (WSNs) play an increasingly important role in the natural ... Keywords: early warning systems, earthquakes, landslides, mobile robotics, tsunamis, wireless sensor networks

M. A. Grado-Caffaro; M. Grado-Caffaro; Mohammad Sadegh Ebrahimi

2011-12-01T23:59:59.000Z

156

Energy-Aware Routing in Wireless Ad-hoc Networks  

E-Print Network (OSTI)

Energy-Aware Routing in Wireless Ad-hoc Networks Panagiotis C. Kokkinos Christos A. Papageorgiou Emmanouel A. Varvarigos Abstract In this work we study energy efficient routing strate- gies for wireless ad-hoc networks. In this kind of net- works, energy is a scarce resource and its conservation

Varvarigo, Emmanouel "Manos"

157

Distributed optimal dynamic base station positioning in wireless sensor networks  

Science Conference Proceedings (OSTI)

Base station (BS) positioning is an effective method for improving the performance of wireless sensor networks (WSNs). A metric-aware optimal BS positioning and relocation mechanism for WSNs is proposed. This technique locates the BS with respect to ... Keywords: Base station placement, Base station relocation, Least-squares optimization, Wireless sensor networks

P. D. Hossein Zadeh; C. Schlegel; M. H. MacGregor

2012-01-01T23:59:59.000Z

158

Automatic mobility status estimation in wireless self-organised networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks and ubiquitous computing are rapidly increasing in popularity and diversity. For many applications of these systems the mobility status of devices forms part of the operating context on which self-organisation is based. This ... Keywords: Lévy Flights, Mobility models and metrics, Reinforcement learning, Self-detection of mobility, Wireless sensor networks

Richard Anthony; Mona Ghassemian

2011-03-01T23:59:59.000Z

159

A secure monitoring and control system for Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

The maintenance of Wireless Sensor Networks (WSNs) can carry high or prohibitive costs, particularly, if the WSN is deployed in unattended areas. Secure monitoring and control of the WSN is vital, however, practical systems are rare and limited with ... Keywords: Monitoring,Wireless sensor networks,Control systems,Intrusion detection,Elliptic curve cryptography

Michael Riecker, Rainer Thome, Dingwen Yuan, Matthias Hollick

2012-10-01T23:59:59.000Z

160

Wireless sensor networks based on publish/subscribe messaging paradigms  

Science Conference Proceedings (OSTI)

Rapidly increasing development and application areas of wireless sensor networks requires the deployment of highly scalable and dynamic communications paradigms for coping with the complex data management tasks encountered in distributed environments. ... Keywords: publish/subscribe messaging systems, wireless sensor networks

Hakan Cam; Ozgur Koray Sahingoz; Ahmet Coskun Sonmez

2011-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Ensemble based sensing anomaly detection in wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks are often used to monitor and measure physical characteristics from remote and sometimes hostile environments. In these circumstances the sensing data accuracy is a crucial attribute for the way these applications complete their ... Keywords: Binary classifier, Data accuracy, Ensemble based systems, Sensors anomalies, Wireless sensor networks

Daniel-Ioan Curiac; Constantin Volosencu

2012-08-01T23:59:59.000Z

162

Geographic convergecast using mobile sink in wireless sensor networks  

Science Conference Proceedings (OSTI)

This paper presents a novel convergecast algorithm called, Virtual Circle Combined Straight Routing (VCCSR), which collects data in a wireless sensor network (WSN) using a mobile sink. Tree-based routing offers the shortest routes to deliver data, and ... Keywords: Clustering, Convergecast, Data collection, Mobile sink, Wireless sensor networks

Tzung-Shi Chen; Hua-Wen Tsai; Yu-Hsin Chang; Tzung-Cheng Chen

2013-02-01T23:59:59.000Z

163

Towards automated design of MAC protocols for underwater wireless networks  

Science Conference Proceedings (OSTI)

We present a framework for the automated design of MAC protocols for underwater acoustic wireless networks. We formulate a protocol optimization problem in which the exchange of control packets is explicitly modeled. A protocol optimization program generates ... Keywords: automation, mac, network, wireless underwater protocol

Volkan Rodoplu; Amir Aminzadeh Gohari; Wei Tang

2008-09-01T23:59:59.000Z

164

Health monitoring of civil infrastructures using wireless sensor networks  

Science Conference Proceedings (OSTI)

A Wireless Sensor Network (WSN) for Structural Health Monitoring (SHM) is designed, implemented, deployed and tested on the 4200ft long main span and the south tower of the Golden Gate Bridge (GGB). Ambient structural vibrations are reliably measured ... Keywords: deployment, large-scale, structural health monitoring, wireless sensor networks

Sukun Kim; Shamim Pakzad; David Culler; James Demmel; Gregory Fenves; Steven Glaser; Martin Turon

2007-04-01T23:59:59.000Z

165

Secure position verification for wireless sensor networks in noisy channels  

Science Conference Proceedings (OSTI)

Position verification in wireless sensor networks (WSNs) is quite tricky in presence of attackers (malicious sensor nodes), who try to break the verification protocol by reporting their incorrect positions (locations) during the verification stage. In ... Keywords: 3? limit, distance estimation, distributed protocol, location verification, quantiles, wireless networks

Partha Sarathi Mandal; Anil K. Ghosh

2011-07-01T23:59:59.000Z

166

Energy efficient searching in delay-tolerant wireless sensor networks  

Science Conference Proceedings (OSTI)

In this paper, we consider the problem of information discovery in densely deployed and delay-tolerant Wireless Sensor Network (WSN), where the initiator of search is unaware of the location of target information. We propose Increasing Ray Search (IRS), ... Keywords: energy efficiency, query, search, wireless sensor networks

Kiran Rachuri; A. Antony Franklin; C. Siva Ram Murthy

2008-05-01T23:59:59.000Z

167

Energy conservation in wireless sensor networks: A survey  

Science Conference Proceedings (OSTI)

In the last years, wireless sensor networks (WSNs) have gained increasing attention from both the research community and actual users. As sensor nodes are generally battery-powered devices, the critical aspects to face concern how to reduce the energy ... Keywords: Energy efficiency, Power management, Survey, Wireless sensor networks

Giuseppe Anastasi; Marco Conti; Mario Di Francesco; Andrea Passarella

2009-05-01T23:59:59.000Z

168

A Delaunay Triangulation based method for wireless sensor network deployment  

Science Conference Proceedings (OSTI)

To obtain a satisfied performance of wireless sensor network, an adaptable sensor deployment method for various applications is essential. In this paper, we propose a centralized and deterministic sensor deployment method, DT-Score (Delaunay Triangulation-Score), ... Keywords: Delaunay Triangulation, Obstacles, Sensor coverage, Sensor deployment, Wireless sensor network

Chun-Hsien Wu; Kuo-Chuan Lee; Yeh-Ching Chung

2007-10-01T23:59:59.000Z

169

Research on IPv6 address configuration for wireless sensor networks  

Science Conference Proceedings (OSTI)

The paper proposes an IPv6 address configuration scheme for wireless sensor networks. In the scheme, one wireless sensor network is divided into multiple clusters and the scheme creates the IPv6 address formats for the cluster heads and the cluster members ...

Xiaonan Wang; Demin Gao

2010-11-01T23:59:59.000Z

170

Optimal Routing and Scheduling in Multihop Wireless Renewable Energy Networks  

E-Print Network (OSTI)

Optimal Routing and Scheduling in Multihop Wireless Renewable Energy Networks MHR. Khouzani-constrained wireless ad-hoc networks where nodes are powered by renewable energy sources. We take into account the fact that renewable energy harvesting processes are unpredictable and stochastic in nature ­ typically depending

Sarkar, Saswati

171

A Co-optimization Routing Algorithm in Wireless Sensor Network  

Science Conference Proceedings (OSTI)

The MACORA is presented to solve the collision between mobile agent and multicast suppression in channel competitive process. With two-layer graph model, the channel converter problem in the dual-channel wireless sensor networks can be simplified into ... Keywords: Co-optimization, Dual-channel, Mobile agent, Packet transmission, The optimal route Restoring, Wireless sensor networks

Ran Jin, Chunhai Kou, Ruijuan Liu, Yefeng Li

2013-06-01T23:59:59.000Z

172

Network Electricity Use Associated with Wireless Personal Digital Assistants  

E-Print Network (OSTI)

Network Electricity Use Associated with Wireless Personal Digital Assistants Jonathan Koomey1 the widely cited claim that the network electricity use associated with a wireless personal digital assistant PDA is equal to the electricity consumed by a refrigerator. It compiles estimates of the data flows

Kammen, Daniel M.

173

Service and Network Management Interworking in Future Wireless Systems  

Science Conference Proceedings (OSTI)

The need for seamless communications in future wireless networks imposes the development of distributed management systems, in which we can distinguish between different business entities, the Service and Network Providers. Such a highly dynamic environment ...

V. Tountopoulos; Vera Stavroulaki; Panagiotis Demestichas; Nikolas Mitrou; Michael E. Theologou

2002-05-01T23:59:59.000Z

174

Mobile identity management system in heterogeneous wireless networks  

Science Conference Proceedings (OSTI)

Heterogeneous wireless networks increasingly encroach on our lives. Various technologies and mobile applications more often than usual are now used by mobile users. Intensive development of mobile networks not only sets new standards for radio, but increasingly ...

?Ukasz Kucharzewski; Zbigniew Kotulski

2011-01-01T23:59:59.000Z

175

A taxonomy of wireless micro-sensor network models  

Science Conference Proceedings (OSTI)

In future smart environments, wireless sensor networks will play a key role in sensing, collecting, and disseminating information about environmental phenomena. Sensing applications represent a new paradigm for network operation, one that has different ...

Sameer Tilak; Nael B. Abu-Ghazaleh; Wendi Heinzelman

2002-04-01T23:59:59.000Z

176

Energy-efficient connected-coverage in wireless sensor networks  

Science Conference Proceedings (OSTI)

This paper addresses the target coverage problem inWireless Sensor Networks (WSNs). Communication and sensing consume energy, therefore, efficient power management can extend network lifetime. In this paper, we consider a large number of sensors ...

Ionut Cardei; Mihaela Cardei

2008-05-01T23:59:59.000Z

177

Dynamic mobile agent migration in Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Computing paradigm plays an important and fundamental role in collaborative processing in Wireless Sensor Networks (WSN). The client/server based paradigm and the mobile agent based paradigm are two popular computing models used to facilitate ... Keywords: WSN, ad hoc computing, ad hoc networks, agent-based systems, client-server computing, collaborative processing, computing paradigms, mobile agent computing, mobile agent itinerary, mobile agents, multi-agent systems, pervasive computing, sensor networks, simulation, ubiquitous computing, wireless networks

Yingyue Xu; Hairong Qi

2006-12-01T23:59:59.000Z

178

Capacity consideration of wireless ad hoc networks  

E-Print Network (OSTI)

Capacity ProblemCurrent Research on Capacity of Wireless Ad HocChapter 3 Upper Bound on the Capacity of Wireless Ad Hoc

Tan, Yusong

2008-01-01T23:59:59.000Z

179

Survey paper: A survey on routing algorithms for wireless Ad-Hoc and mesh networks  

Science Conference Proceedings (OSTI)

Wireless networking technology is evolving as an inexpensive alternative for building federated and community networks (relative to the traditional wired networking approach). Besides its cost-effectiveness, a wireless network brings operational efficiencies, ... Keywords: Ad-Hoc network, Multi-hop network, Routing algorithm, Wireless Mesh Network (WMN)

Eiman Alotaibi; Biswanath Mukherjee

2012-02-01T23:59:59.000Z

180

Optimal monitoring in multi-channel multi-radio wireless mesh networks  

Science Conference Proceedings (OSTI)

Wireless mesh networks (WMN) are finding increasing usage in city-wide deployments for providing network connectivity. Mesh routers in WMNs typically use multiple wireless channels to enhance the spatial-reuse of frequency bands, often with multiple ... Keywords: approximation algorithm, lp rounding, multi-channel multi-radio wireless networks, security monitoring, wireless mesh networks

Dong-Hoon Shin; Saurabh Bagchi

2009-05-01T23:59:59.000Z

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While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Wireless Sensor Network for Electric Transmission Line Monitoring  

SciTech Connect

Generally, federal agencies tasked to oversee power grid reliability are dependent on data from grid infrastructure owners and operators in order to obtain a basic level of situational awareness. Since there are many owners and operators involved in the day-to-day functioning of the power grid, the task of accessing, aggregating and analyzing grid information from these sources is not a trivial one. Seemingly basic tasks such as synchronizing data timestamps between many different data providers and sources can be difficult as evidenced during the post-event analysis of the August 2003 blackout. In this project we investigate the efficacy and cost effectiveness of deploying a network of wireless power line monitoring devices as a method of independently monitoring key parts of the power grid as a complement to the data which is currently available to federal agencies from grid system operators. Such a network is modeled on proprietary power line monitoring technologies and networks invented, developed and deployed by Genscape, a Louisville, Kentucky based real-time energy information provider. Genscape measures transmission line power flow using measurements of electromagnetic fields under overhead high voltage transmission power lines in the United States and Europe. Opportunities for optimization of the commercial power line monitoring technology were investigated in this project to enable lower power consumption, lower cost and improvements to measurement methodologies. These optimizations were performed in order to better enable the use of wireless transmission line monitors in large network deployments (perhaps covering several thousand power lines) for federal situational awareness needs. Power consumption and cost reduction were addressed by developing a power line monitor using a low power, low cost wireless telemetry platform known as the ''Mote''. Motes were first developed as smart sensor nodes in wireless mesh networking applications. On such a platform, it has been demonstrated in this project that wireless monitoring units can effectively deliver real-time transmission line power flow information for less than $500 per monitor. The data delivered by such a monitor has during the course of the project been integrated with a national grid situational awareness visualization platform developed by Oak Ridge National Laboratory. Novel vibration energy scavenging methods based on piezoelectric cantilevers were also developed as a proposed method to power such monitors, with a goal of further cost reduction and large-scale deployment. Scavenging methods developed during the project resulted in 50% greater power output than conventional cantilever-based vibrational energy scavenging devices typically used to power smart sensor nodes. Lastly, enhanced and new methods for electromagnetic field sensing using multi-axis magnetometers and infrared reflectometry were investigated for potential monitoring applications in situations with a high density of power lines or high levels of background 60 Hz noise in order to isolate power lines of interest from other power lines in close proximity. The goal of this project was to investigate and demonstrate the feasibility of using small form factor, highly optimized, low cost, low power, non-contact, wireless electric transmission line monitors for delivery of real-time, independent power line monitoring for the US power grid. The project was divided into three main types of activity as follows; (1) Research into expanding the range of applications for non-contact power line monitoring to enable large scale low cost sensor network deployments (Tasks 1, 2); (2) Optimization of individual sensor hardware components to reduce size, cost and power consumption and testing in a pilot field study (Tasks 3,5); and (3) Demonstration of the feasibility of using the data from the network of power line monitors via a range of custom developed alerting and data visualization applications to deliver real-time information to federal agencies and others tasked with grid reliability (Tasks 6,8)

Alphenaar, Bruce

2009-06-30T23:59:59.000Z

182

A Generic Framework for Cross-Layer Optimisation in Wireless Personal Area Networks  

Science Conference Proceedings (OSTI)

Wireless Personal Area Networking (WPAN) is introduced as a new concept for next generation wireless systems. WPANs are short-range wireless systems operating in the direct surrounding of the user. A reference architecture for short-range wireless communications ... Keywords: cross-layer optimisation, wireless personal area networks

Carl Wijting; Ramjee Prasad

2004-04-01T23:59:59.000Z

183

Model-based compression in wireless ad hoc networks  

Science Conference Proceedings (OSTI)

We present a technique for compression of shortest paths routing tables for wireless ad hoc networks. The main characteristic of such networks is that geographic location of nodes determines network topology. As opposed to encoding individual node locations, ... Keywords: compression, modeling, routing protocols, routing tables, sensor networks, trajectory

Milenko Drinic; Darko Kirovski; Miodrag Potkonjak

2003-11-01T23:59:59.000Z

184

HUSEC: A heuristic self configuration model for wireless sensor networks  

Science Conference Proceedings (OSTI)

The Network State Beacons (NSB) exchange rate is the critical parameter in monitoring the dynamic state of any self-configuring ad hoc sensor network. Along with the network state and the overhead control traffic, it determines both the time and nature ... Keywords: Beacon exchange rate, Self-configuration, Wireless ad hoc sensor networks

Mudasser Iqbal; Iqbal Gondal; Laurence S. Dooley

2007-05-01T23:59:59.000Z

185

Cognitive maritime wireless mesh/ad hoc networks  

Science Conference Proceedings (OSTI)

Cognitive maritime wireless mesh/ad hoc networks are proposed in this paper, for the purpose to provide high-speed and low-cost communications for the current maritime users by incorporating the licensed but unused frequency bands opportunistically. ... Keywords: Cognitive radio networks, IEEE 802.16, Maritime communications, Maritime mesh networks, Mesh/ad hc networks, White Space

Ming-Tuo Zhou; Hiroshi Harada

2012-03-01T23:59:59.000Z

186

Developing measures of intellectual capital in commercial wireless television by the analytical hierarchy process  

Science Conference Proceedings (OSTI)

The purpose of this research is to establish the intellectual capital indicators of commercial wireless television companies. An in-depth interview is used to collect data. Both content analysis and analytical hierarchy process are used to analyse ... Keywords: AHP, analytical hierarchy process, commercial wireless television, competitive advantage, content analysis, human capital, in-depth interview, innovation capital, intellectual capital, m-commerce, mobile commerce, mobile communications, wireless television

Chung-Chu Liu

2007-03-01T23:59:59.000Z

187

Solar-Aware clustering in wireless sensor networks  

E-Print Network (OSTI)

Energy conservation plays a crucial in wireless sensor networks since such networks are designed to be placed in hostile and non-accessible areas. While battery-driven sensors will run out of battery sooner or later, the use of renewable energy sources such as solar power or gravitation may extend the lifetime of a sensor network. We propose to utilize solar power in wireless sensor networks and extend LEACH a well-known cluster-based protocol for sensor networks to become solar-aware. The presented simulation results show that making LEACH solar-aware significantly extends the lifetime of sensor networks. 1

Thiemo Voigt; Hartmut Ritter

2004-01-01T23:59:59.000Z

188

Handover Performance of HVAC Duct Based Indoor Wireless Networks  

E-Print Network (OSTI)

Handover Performance of HVAC Duct Based Indoor Wireless Networks A. E. Xhafa, P. Sonthikorn, and O in indoor wireless net- works (IWN) that use heating, ventilation, and air conditioning (HVAC) ducts.e., new call blocking and handover dropping probabilities, of an IWN that uses HVAC ducts are up to 6

Stancil, Daniel D.

189

Power management and power control in wireless networks  

E-Print Network (OSTI)

With the proliferation of portable computing platforms and small wireless devices, wireless networks have received more and more attention as a means for providing data communications among devices regardless of their physical locations. However, due to the slow advancement in battery technology, battery power continues to be a constrained resource in wireless networks and thus energy conservation remains to be an important issue. In this book chapter, we provide a taxonomy of power management and power control algorithms and protocols for wireless networks. We start with a description of energy consumption characteristics of wireless devices, and identify the power consumed in the wireless transmitters essentially consists of two parts: power consumed by the radio electronic and power consumed in the RF output. To save power, one can either turn off the radio electronic and put wireless devices into the power saving mode at appropriate times, or adjust the RF output power (and hence the wireless transmission range) subject to maintaining network connectivity and bi-directionality. The former techniques are termed as power management, while the latter power

Rong Zheng; Jennifer C. Hou; Ning Li

2004-01-01T23:59:59.000Z

190

Solar-aware Routing in Wireless Sensor Networks  

E-Print Network (OSTI)

Solar-aware Routing in Wireless Sensor Networks Thiemo Voigt, Hartmut Ritter and Jochen Schiller energy sources such as solar power may provide unlimited energy resources to a changing subset these nodes is appealing. In this paper, we present solar-aware routing, a rout- ing protocol for wireless

191

Physical layer model design for wireless networks  

E-Print Network (OSTI)

Wireless network analysis and simulations rely on accurate physical layer models. The increased interest in wireless network design and cross-layer design require an accurate and efficient physical layer model especially when a large number of nodes are to be studied and building the real network is not possible. For analysis of upper layer characteristics, a simplified physical layer model has to be chosen to model the physical layer. In this dissertation, the widely used two-state Markov model is examined and shown to be deficient for low to moderate signal-to-noise ratios. The physical layer statistics are investigated, and the run length distributions of the good and bad frames are demonstrated to be the key statistics for accurate physical layer modeling. A four-state Markov model is proposed for the flat Rayleigh fading channel by approximating the run length distributions with a mixture of exponential distributions. The transition probabilities in the four-state Markov model can be established analytically without having to run extensive physical layer simulations, which are required for the two-state Markov model. Physical layer good and bad run length distributions are compared and it is shown that the four-state Markov model reasonably approximates the run length distributions. Ns2 simulations are performed and the four-state Markov model provides a much more realistic approximation compared to the popular two-state Markov model. Achieving good results with the flat Rayleigh fading channel, the proposed four-state Markov model is applied to a few diversity channels. A coded orthogonal fre- quency division multiplexing (OFDM) system with a frequency selective channel and the Alamouti multiple-input multiple-output system are chosen to verify the accuracy of the four-state Markov model. The network simulation results show that the four-state Markov model approximates the physical layer with diversity channel well whereas the traditional two-state Markov model estimates the network throughput poorly. The success of adapting the four-state Markov model to the diversity channel also shows the flexibility of adapting the four-state Markov model to various channel conditions.

Yu, Yi

2006-08-01T23:59:59.000Z

192

Oak Ridge National Laboratory - Wireless Networking  

NLE Websites -- All DOE Office Websites (Extended Search)

Oak Ridge National Laboratory Oak Ridge National Laboratory Oak Ridge National Laboratory UT-Battelle U.S. Department of Energy Oak Ridge National Laboratory Oak Ridge National Laboratory Oak Ridge National Laboratory Find People · Contacts · Site Index · Comments Saturday, January 11, 2014 Location right-hand arrow ORNL Home · Visiting ORNL · Wireless Networking Home News About ORNL ORNL Video Science & Technology Spallation Neutron Source User Facilities Technology Transfer Working with ORNL Community Outreach Jobs Visitor Information Calendar of Events University Partners Contact Us Featured Sites Home News About ORNL ORNL Video Science & Technology Spallation Neutron Source User Facilities Technology Transfer Working with ORNL Community Outreach Jobs Visitor Information Calendar of Events

193

Distributed Rate Allocation for Wireless Networks  

E-Print Network (OSTI)

This paper describes a distributed algorithm for rate allocation in wireless networks. As the main result, the paper establishes that this algorithm is throughput-optimal for very general class of throughput regions. In contrast to distributed on-off scheduling algorithms, this algorithm enables optimal utilization of physical layer schemes by scheduling multiple rate levels. The algorithm is based on a Markov process on these discrete set of rates with certain transition rates. For dealing with multiple rate levels, the paper introduces an important structure for the transition rates, which enable the design of appropriate update rule for these transition rates. The update uses local queue length information alone, and thus does not require global exchange of queue length information. In addition, the algorithm requires that each link can determine the feasibility of increasing its data-rate from the current value without reducing the data-rates of other links. Determining rate feasibility does not introduce...

Jose, Jubin

2010-01-01T23:59:59.000Z

194

Knowledge-based duty cycle estimation in wireless sensor networks: Application for sound pressure monitoring  

Science Conference Proceedings (OSTI)

Wireless sensor networks comprise an important research area and a near future for industry and communications. Wireless sensor networks contain resource-constrained sensor nodes that are powered by small batteries, limited process and memory and wireless ... Keywords: Constrained device, Fuzzy rule based system, Multi-agent system, Sound pressure, Wireless sensor network

J. C. Cuevas-Martinez; J. Canada-Bago; J. A. Fernandez-Prieto; M. A. Gadeo-Martos

2013-02-01T23:59:59.000Z

195

Making sensor networks immortal: an energy-renewal approach with wireless power transfer  

Science Conference Proceedings (OSTI)

Wireless sensor networks are constrained by limited battery energy. Thus, finite network lifetime is widely regarded as a fundamental performance bottleneck. Recent breakthrough in the area of wireless power transfer offers the potential of removing ... Keywords: lifetime, optimization, wireless power transfer, wireless sensor network (WSN)

Liguang Xie; Yi Shi; Y. Thomas Hou; Hanif D. Sherali

2012-12-01T23:59:59.000Z

196

Integrated topology control and routing in wireless sensor networks for prolonged network lifetime  

Science Conference Proceedings (OSTI)

This study considers an integrated topology control and routing problem in wireless sensor networks (WSNs), which are employed to gather data via use of sensors with limited energy resources. We employ a hierarchical topology and routing structure with ... Keywords: Algorithms, Data gathering, Network design models, Wireless sensor networks

Halit íster; Hui Lin

2011-07-01T23:59:59.000Z

197

Wireless sensor network system for supporting nursing context-awareness  

Science Conference Proceedings (OSTI)

We developed a wireless sensor network system for supporting context-awareness of nursing activities in hospitals. Our system is aimed at automated recording of nursing work, providing context-aware services to nurses and visualising analytical results ...

Futoshi Naya; Ren Ohmura; Masakazu Miyamae; Haruo Noma; Kiyoshi Kogure; Michita Imai

2011-11-01T23:59:59.000Z

198

Municipal wireless mesh networks as a competitive broadband delivery platform  

E-Print Network (OSTI)

Recently there has been a growing interest in deploying Wireless Mesh Networks by municipalities. This interest stems from the desire to provide broadband connectivity to users lacking access to broadband alternatives. The ...

Hassan-Ali, Mudhafar

2007-01-01T23:59:59.000Z

199

Cooperative game-based routing approach for wireless sensor network  

Science Conference Proceedings (OSTI)

Aiming at the security and limited energy issues in wireless sensor network, this paper introduces a secure and energy-saving routing protocol based on cooperative game strategy. A novel incentive mechanism is proposed: all the nodes including the selfish ...

Fengyun Li; Guiran Chang; Lan Yao; Fuxiang Gao

2012-08-01T23:59:59.000Z

200

Outage-based throughput in wireless packet networks  

E-Print Network (OSTI)

With the increased competition for the electromagnetic spectrum, it is important to characterize the impact of interference in the performance of a wireless packet network, which is traditionally measured by its throughput. ...

Win, Moe Z.

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Securing a Wireless Networked Control System Using Information Fusion  

Science Conference Proceedings (OSTI)

Security of a wireless sensor network practically governs its usability in several applications. Especially, in applications like Industrial control systems which use NCS and SCADA systems, the security affects the stability of the system. We propose ...

Brijesh Kashyap Chejerla, Sanjay Madria

2012-10-01T23:59:59.000Z

202

Opportunistic routing in multi-hop wireless networks  

E-Print Network (OSTI)

This thesis describes ExOR, an integrated routing and MAC protocol for bulk transfers in multi-hop wireless networks. ExOR exploits the broadcast nature of radios by making forwarding decisions based on which nodes receive ...

Biswas, Sanjit Zubin

2005-01-01T23:59:59.000Z

203

Orthogonal Rendezvous Routing Protocol for Wireless Mesh Networks  

E-Print Network (OSTI)

Routing in multi-hop wireless networks involves the indirection from a persistent name (or ID) to a locator. Concepts such as coordinate space embedding help reduce the number and dynamism complexity of bindings and state ...

Cheng, Bow-Nan

204

Typhoon: a reliable data dissemination protocol for wireless sensor networks  

Science Conference Proceedings (OSTI)

We present Typhoon, a protocol designed to reliably deliver large objects to all the nodes of a wireless sensor network (WSN). Typhoon uses a combination of spatially-tuned timers, prompt retransmissions, and frequency diversity to reduce contention ...

Chieh-Jan Mike Liang; R?zvan Mus?loiu-E.; Andreas Terzis

2008-01-01T23:59:59.000Z

205

ESF: an efficient security framework for wireless sensor network  

Science Conference Proceedings (OSTI)

A wireless sensor network WSN consists of a large number of resource constrained sensor nodes, usually deployed in hostile environments, where they face a variety of malicious attacks. To address the security vulnerabilities in WSN, this paper proposes ...

Somanath Tripathy

2013-02-01T23:59:59.000Z

206

Quality-Driven Volcanic Earthquake Detection Using Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Volcano monitoring is of great interest to public safety and scientific explorations. However, traditional volcanic instrumentation such as broadband seismometers are expensive, power-hungry, bulky, and difficult to install. Wireless sensor networks ...

Rui Tan; Guoliang Xing; Jinzhu Chen; Wen-Zhan Song; Renjie Huang

2010-11-01T23:59:59.000Z

207

Probabilistic data collection protocols for energy harvesting wireless sensor networks  

Science Conference Proceedings (OSTI)

Energy harvesting from ambient energy sources including solar and vibration has been studied as a candidate for powering next generation wireless sensor networks. However, energy harvesting is unstable to supply a sensor node with energy, and a node ...

Masaya Yoshida; Tomoya Kitani; Masaki Bandai; Takashi Watanabe; Pai H. Chou; Winston K. G. Seah

2012-11-01T23:59:59.000Z

208

A Delaunay Triangulation Based Method for Wireless Sensor Network Deployment  

Science Conference Proceedings (OSTI)

To obtain a satisfied performance of wireless sensor network, an adaptable sensor deployment method for various applications is essential. In this paper, we propose a centralized sensor deployment method, DT-Score, aims to maximize the coverage of a ...

Chun-Hsien Wu; Kuo-Chuan Lee; Yeh-Ching Chung

2006-07-01T23:59:59.000Z

209

Wireless sensor networks for structural and environmental monitoring  

Science Conference Proceedings (OSTI)

The article discusses various applications of Wireless Sensor Networks (WNS) in environment and civil engineering constructions monitoring with a particular emphasis on the evaluation of the influence of individual node failures on the operation of the ...

Igor Dunajewski

2008-01-01T23:59:59.000Z

210

ROPE: robust position estimation in wireless sensor networks  

Science Conference Proceedings (OSTI)

We address the problem of secure location determination, known as Secure Localization, and the problem of verifying the location claim of a node, known as Location Verification, in Wireless Sensor Networks (WSN). We propose a robust positioning ...

Loukas Lazos; Radha Poovendran; Srdjan ?apkun

2005-04-01T23:59:59.000Z

211

Advanced MAC protocol with energy-efficiency for wireless sensor networks  

Science Conference Proceedings (OSTI)

This paper proposes E2-MAC, a contention-based energy-efficient Medium Access Control (MAC) Protocol for wireless sensor networks. Energy efficiency is primary goal in wireless sensor networks. Existing MAC protocols for sensor networks attempt ...

Jae-Hyun Kim; Ho-Nyeon Kim; Seog-Gyu Kim; Seung-Jun Choi; Jai-Yong Lee

2005-01-01T23:59:59.000Z

212

Connecting Windows XP to the Riverpoint Wireless Network To connect an XP computer to the Riverpoint wireless network, you must first authenticate the computer and then connect  

E-Print Network (OSTI)

Connecting Windows XP to the Riverpoint Wireless Network To connect an XP computer. This document explains each of these processes. 1. Give Windows control of wireless: a. Go to Control Panel Network Connection, and click Properties. d. Click the Wireless Networks tab, verify that the Use windows

Collins, Gary S.

213

An efficient cluster-based self-organisation algorithm for wireless sensor networks  

Science Conference Proceedings (OSTI)

The paper proposes an Efficient Cluster-based Self-organisation Algorithm (ECSA) for partitioning Wireless Sensor Networks (WSNs) into clusters, thus giving at the network a hierarchical organisation. Each sensor uses its weight ... Keywords: WSNs, cluster head, clustering algorithms, energy dissipation, homogeneous clusters, k-density, network lifetime, node weight, residual energy, self-organisation, wireless networks, wireless sensor networks

Mohamed Lehsaini; Herve Guyennet; Mohammed Feham

2010-02-01T23:59:59.000Z

214

Towards clock skew based services in wireless sensor networks  

Science Conference Proceedings (OSTI)

Clock skew, an inherent property of clock crystals of physical devices, is defined as the rate of deviation of a device clock from the true time. The frequency of a device's clock actually depends on its environment, such as the temperature, humidity, ... Keywords: Sybil attacks, attack detection, clock crystals, clock skews, covert channels, electromagnetic interference, fingerprinting, geolocation, humidity, malfunctioning mote identification, malicious mote identification, measurement, multi-hop WSN, node identification, security, sensor motes, temperature, vibration, wireless networks, wireless sensor networks, wormhole attacks

Md. Borhan Uddin; Claude Castelluccia

2011-12-01T23:59:59.000Z

215

Statistical delay budget partitioning in wireless mesh networks  

Science Conference Proceedings (OSTI)

Wireless Mesh Networks (WMNs) are currently attracting strong attention due to their great potential in supporting multimedia applications with real-time transport with last-mile Internet access. Multimedia end-to-end transmission requires Quality of ... Keywords: Delay budget partitioning, End-to-end QoS, IEEE 802.11s, IEEE 802.16j, Radio resource management, Wireless mesh networks

Najah A. Abu-Ali; Hossam S. Hassanein

2008-05-01T23:59:59.000Z

216

Study of joint routing and wireless charging strategies in sensor networks  

Science Conference Proceedings (OSTI)

In recent years, wireless charging (a.k.a. wireless energy transferring) [3] has been recognized as a promising alternative to address the energy constraint challenge in wireless sensor networks. Comparing to the conventional energy conservation or harvesting ...

Zi Li; Yang Peng; Wensheng Zhang; Daji Qiao

2010-08-01T23:59:59.000Z

217

Fault tolerance in ZigBee wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSN) based on the IEEE 802.15.4 Personal Area Network standard are finding increasing use in the home automation and emerging smart energy markets. The network and application layers, based on the ZigBee 2007 PRO Standard, provide ...

Richard Alena; Ray Gilstrap; Jarren Baldwin; Thom Stone; Pete Wilson

2011-03-01T23:59:59.000Z

218

Improving broadcast efficiency in wireless sensor network time synchronization protocols  

Science Conference Proceedings (OSTI)

In this work we proposed an algorithm to allow nodes in a wireless sensor network to interconnect in a way such that time stamp information can be efficiently distributed for network wide synchronization. The algorithm works by first establishing a level ... Keywords: broadcast optimization, sensor networks, time synchronization

Wenxun Huang; Yujuan Quan; Deming Chen

2012-06-01T23:59:59.000Z

219

Lossy Data Aggregation in Multihop Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

In wireless sensor networks, in-network data aggregation is an efficient way to reduce energy consumption in network. However, most of the existing data aggregation scheduling methods try to aggregate the data from all the nodes at all time-instances. ... Keywords: Data Loss, Data Sampling, Energy Efficiency, Lossy Data Aggregation

Guojun Dai; Jianhui Zhang; Shaojie Tang; Xingfa Shen; Changping Lv

2009-12-01T23:59:59.000Z

220

Dynamic Control and Optimization of Buffer Size in Wireless Networks  

E-Print Network (OSTI)

Telecommunications System (UMTS) SMS network that achieves better utilization of high bandwidth packet networks versatility, including text, im- ages, audio and video, between mobile devices and from applications infrastructure. This paper investigates the approach of [4] as it applies to such wireless networks. It focuses

Panayiotou, Christos

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Diagnostic Tools for Wireless Sensor Networks: A Comparative Survey  

Science Conference Proceedings (OSTI)

The availability of tools to diagnose Wireless Sensor Network (WSN) failures is a key success factor for this type of networks as already demonstrated by several long-running deployments. By nature, WSNs are resource-constrained, fragile, complex to ... Keywords: Embedded debugging, Sensor diagnosing, Sensor failure, Sensor networks, Testing and debugging

André Rodrigues; Tiago Camilo; Jorge Sá Silva; Fernando Boavida

2013-09-01T23:59:59.000Z

222

Task-oriented Distributed Information Fusion in Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

A wireless sensor network may form a part of the base for cloud computing through Internet. We present a framework of task-oriented distributed data fusion, and investigate the assignments of heterogeneous sensors on nodes in the network for a specified ... Keywords: Distributed Decision Making, Linguistic Decision Trees, Network Hierarchy, Optimal sensor assignments

Hongmei He; Zhenhuan Zhu; Erkki Makinen

2012-08-01T23:59:59.000Z

223

WiMsh: a simple and efficient tool for simulating IEEE 802.16 wireless mesh networks in ns-2  

Science Conference Proceedings (OSTI)

Wireless mesh networks (WMNs) are two-tier wireless multihop networks. The top tier is made of wireless routers, which provide access to the wireless clients in the bottom tier. One technology for enabling multi-hop communication in the top tier is IEEE ... Keywords: IEEE 802.16, network simulator 2, simulation, wireless mesh networks

Claudio Cicconetti; Ian F. Akyildiz; Luciano Lenzini

2009-03-01T23:59:59.000Z

224

Review: Connected dominating sets in wireless ad hoc and sensor networks - A comprehensive survey  

Science Conference Proceedings (OSTI)

Topology control is a fundamental issue in wireless ad hoc and sensor networks. Due to intrinsic characteristic of flatness, hierarchical topology can achieve the scalability and efficiency of a wireless network. To solve this problem, one can construct ... Keywords: Connected dominating set (CDS), Topology control, Virtual backbone network, Wireless network

Jiguo Yu; Nannan Wang; Guanghui Wang; Dongxiao Yu

2013-01-01T23:59:59.000Z

225

Mobility-assisted minimum connected cover in a wireless sensor network  

Science Conference Proceedings (OSTI)

All properties of mobile wireless sensor networks (MWSNs) are inherited from static wireless sensor networks (WSNs) and meanwhile have their own uniqueness and node mobility. Sensor nodes in these networks monitor different regions of an area of interest ... Keywords: Energy-aware selection method, Minimum connected sensor cover set, Mobile wireless sensor networks, Redundant node, Relocation

Ahmed M. Khedr; Walid Osamy

2012-07-01T23:59:59.000Z

226

Joint optimisation for power control, scheduling and routing algorithms in the infrastructure wireless mesh network  

Science Conference Proceedings (OSTI)

The performance optimisation model for the IEEE 802.16 standard based wireless mesh network is presented and a joint optimisation method is proposed as the sub-optimal solution strategy, in which the power control, scheduling and routing algorithms ... Keywords: IEEE 80216, WMN, network throughput, performance optimisation, power control, routing, scheduling, simulation, wireless mesh networks, wireless networks

Mugen Peng; Yingjie Wang; Kun Wang; Wenbo Wang

2008-02-01T23:59:59.000Z

227

Wireless Sensors and Networks for Advanced Energy Management  

SciTech Connect

Numerous national studies and working groups have identified low-cost, very low-power wireless sensors and networks as a critical enabling technology for increasing energy efficiency, reducing waste, and optimizing processes. Research areas for developing such sensor and network platforms include microsensor arrays, ultra-low power electronics and signal conditioning, data/control transceivers, and robust wireless networks. A review of some of the research in the following areas will be discussed: (1) Low-cost, flexible multi-sensor array platforms (CO{sub 2}, NO{sub x}, CO, humidity, NH{sub 3}, O{sub 2}, occupancy, etc.) that enable energy and emission reductions in applications such as buildings and manufacturing; (2) Modeling investments (energy usage and savings to drive capital investment decisions) and estimated uptime improvements through pervasive gathering of equipment and process health data and its effects on energy; (3) Robust, self-configuring wireless sensor networks for energy management; and (4) Quality-of-service for secure and reliable data transmission from widely distributed sensors. Wireless communications is poised to support technical innovations in the industrial community, with widespread use of wireless sensors forecasted to improve manufacturing production and energy efficiency and reduce emissions. Progress being made in wireless system components, as described in this paper, is helping bring these projected improvements to reality.

Hardy, J.E.

2005-05-06T23:59:59.000Z

228

Maximizing network lifetime based on transmission range adjustment in wireless sensor networks  

Science Conference Proceedings (OSTI)

In a wireless sensor network (WSN), the unbalanced distribution of communication loads often causes the problem of energy hole, which means the energy of the nodes in the hole region will be exhausted sooner than the nodes in other regions. This is a ... Keywords: Energy hole problem, Multi-objective optimization problem, NP hard, Wireless sensor networks

Chao Song; Ming Liu; Jiannong Cao; Yuan Zheng; Haigang Gong; Guihai Chen

2009-07-01T23:59:59.000Z

229

Transmitting and gathering streaming data in wireless multimedia sensor networks within expected network lifetime  

Science Conference Proceedings (OSTI)

Using multimedia sensor nodes in wireless sensor networks (WSNs) can significantly enhance the capability of WSNs for event description. Different kinds of holes can easily appear in WSNs. How to efficiently transmit multi-media streaming data and bypass ... Keywords: cross layer design, geographical multipath routing, wireless multimedia sensor networks

Lei Shu; Yan Zhang; Zhangbing Zhou; Manfred Hauswirth; Zhiwen Yu; Gearoid Hynes

2008-08-01T23:59:59.000Z

230

Deploying a wireless sensor network on an active volcano  

E-Print Network (OSTI)

Augmenting heavy and power-hungry data collection equipment with lighter, smaller wireless sensor network nodes leads to faster,larger deployments. Arrays comprising dozens of wireless sensor nodes are now possible,allowing scientific studies that aren’t feasible with traditional instrumentation. Designing sensor networks to support volcanic studies requires addressing the high data rates and high data fidelity these studies demand. The authors ’ sensor-network application for volcanic data collection relies on triggered event detection and reliable data retrieval to meet bandwidth and data-quality demands. Wireless sensor networks — in which numerous resource-limited nodes are linked via low-bandwidth wireless radios — have been the focus of intense research during the past few years. Since their conception, they’ve excited a range of scientific communities because of their potential to facilitate data acquisition and scientific studies. Collaborations between computer scientists and other domain scientists have produced networks that can record data at a scale and resolution not previously possible. Taking this progress one step further, wireless sensor networks can potentially advance the pursuit of geophysical studies of volcanic activity. Two years ago, our team of computer scientists at Harvard University began collaborating with volcanologists at the University of North Carolina, the University of New Hampshire, and the Instituto

Konrad Lorincz; Matt Welsh; Omar Marcillo; Jeff Johnson; Mario Ruiz; Jonathan Lees

2006-01-01T23:59:59.000Z

231

Effective algorithms and protocols for wireless networking: a topological approach  

E-Print Network (OSTI)

Much research has been done on wireless sensor networks. However, most protocols and algorithms for such networks are based on the ideal model Unit Disk Graph (UDG) model or do not assume any model. Furthermore, many results assume the knowledge of location information of the network. In practice, sensor networks often deviate from the UDG model significantly. It is not uncommon to observe stable long links that are more than five times longer than unstable short links in real wireless networks. A more general network model, the quasi unit-disk graph (quasi-UDG) model, captures much better the characteristics of wireless networks. However, the understanding of the properties of general quasi-UDGs has been very limited, which is impeding the design of key network protocols and algorithms. In this dissertation we study the properties for general wireless sensor networks and develop new topological/geometrical techniques for wireless sensor networking. We assume neither the ideal UDG model nor the location information of the nodes. Instead we work on the more general quasi-UDG model and focus on figuring out the relationship between the geometrical properties and the topological properties of wireless sensor networks. Based on such relationships we develop algorithms that can compute useful substructures (planar subnetworks, boundaries, etc.). We also present direct applications of the properties and substructures we constructed including routing, data storage, topology discovery, etc. We prove that wireless networks based on quasi-UDG model exhibit nice properties like separabilities, existences of constant stretch backbones, etc. We develop efficient algorithms that can obtain relatively dense planar subnetworks for wireless sensor networks. We also present efficient routing protocols and balanced data storage scheme that supports ranged queries. We present algorithmic results that can also be applied to other fields (e.g., information management). Based on divide and conquer and improved color coding technique, we develop algorithms for path, matching and packing problem that significantly improve previous best algorithms. We prove that it is unlikely for certain problems in operation science and information management to have any relatively effective algorithm or approximation algorithm for them.

Zhang, Fenghui

2008-08-01T23:59:59.000Z

232

Increasing network lifetime in an energy-constrained wireless sensor network  

Science Conference Proceedings (OSTI)

Energy in wireless sensor networks is a scarce resource, therefore an energy-efficient mechanism is required to increase the network lifetime. In this paper, we study the problem of optimal power allocation, taking into account the estimation of the ...

Said El Abdellaoui; Mérouane Debbah; Youssef Fakhri; Driss Aboutajdine

2013-03-01T23:59:59.000Z

233

Connecting Windows 7 to the Riverpoint Wireless Network This document explains how to connect Windows 7 to the wireless network at the WSU-Spokane campus.  

E-Print Network (OSTI)

Connecting Windows 7 to the Riverpoint Wireless Network This document explains how to connect Windows 7 to the wireless network at the WSU-Spokane campus. 1. Click the wireless icon on your desktop name and password in the Windows Security dialog box that appears. You are now connected

Collins, Gary S.

234

Wireless Infrastructure for Performing Monitoring, Diagnostics, and Control HVAC and Other Energy-Using Systems in Small Commercial Buildings  

Science Conference Proceedings (OSTI)

This project focused on developing a low-cost wireless infrastructure for monitoring, diagnosing, and controlling building systems and equipment. End users receive information via the Internet and need only a web browser and Internet connection. The system used wireless communications for: (1) collecting data centrally on site from many wireless sensors installed on building equipment, (2) transmitting control signals to actuators and (3) transmitting data to an offsite network operations center where it is processed and made available to clients on the Web (see Figure 1). Although this wireless infrastructure can be applied to any building system, it was tested on two representative applications: (1) monitoring and diagnostics for packaged rooftop HVAC units used widely on small commercial buildings and (2) continuous diagnosis and control of scheduling errors such as lights and equipment left on during unoccupied hours. This project developed a generic infrastructure for performance monitoring, diagnostics, and control, applicable to a broad range of building systems and equipment, but targeted specifically to small to medium commercial buildings (an underserved market segment). The proposed solution is based on two wireless technologies. The first, wireless telemetry, is used for cell phones and paging and is reliable and widely available. This risk proved to be easily managed during the project. The second technology is on-site wireless communication for acquiring data from sensors and transmitting control signals. The technology must enable communication with many nodes, overcome physical obstructions, operate in environments with other electrical equipment, support operation with on-board power (instead of line power) for some applications, operate at low transmission power in license-free radio bands, and be low cost. We proposed wireless mesh networking to meet these needs. This technology is relatively new and has been applied only in research and tests. This proved to be a major challenge for the project and was ultimately abandoned in favor of a directly wired solution for collecting sensor data at the building. The primary reason for this was the relatively short ranges at which we were able to effectively place the sensor nodes from the central receiving unit. Several different mesh technologies were attempted with similar results. Two hardware devices were created during the original performance period of the project. The first device, the WEB-MC, is a master control unit that has two radios, a CPU, memory, and serves as the central communications device for the WEB-MC System (Currently called the 'BEST Wireless HVAC Maintenance System' as a tentative commercial product name). The WEB-MC communicates with the local mesh network system via one of its antennas. Communication with the mesh network enables the WEB-MC to configure the network, send/receive data from individual motes, and serves as the primary mechanism for collecting sensor data at remote locations. The second antenna enables the WEB-MC to connect to a cellular network ('Long-Haul Communications') to transfer data to and from the NorthWrite Network Operations Center (NOC). A third 'all-in-one' hardware solution was created after the project was extended (Phase 2) and additional resources were provided. The project team leveraged a project funded by the State of Washington to develop a hardware solution that integrated the functionality of the original two devices. The primary reason for this approach was to eliminate the mesh network technical difficulties that severely limited the functionality of the original hardware approach. There were five separate software developments required to deliver the functionality needed for this project. These include the Data Server (or Network Operations Center), Web Application, Diagnostic Software, WEB-MC Embedded Software, Mote Embedded Software. Each of these developments was necessarily dependent on the others. This resulted in a challenging management task - requiring high bandwidth communications among

Patrick O'Neill

2009-06-30T23:59:59.000Z

235

Wireless Infrastructure for Performing Monitoring, Diagnostics, and Control HVAC and Other Energy-Using Systems in Small Commercial Buildings  

SciTech Connect

This project focused on developing a low-cost wireless infrastructure for monitoring, diagnosing, and controlling building systems and equipment. End users receive information via the Internet and need only a web browser and Internet connection. The system used wireless communications for: (1) collecting data centrally on site from many wireless sensors installed on building equipment, (2) transmitting control signals to actuators and (3) transmitting data to an offsite network operations center where it is processed and made available to clients on the Web (see Figure 1). Although this wireless infrastructure can be applied to any building system, it was tested on two representative applications: (1) monitoring and diagnostics for packaged rooftop HVAC units used widely on small commercial buildings and (2) continuous diagnosis and control of scheduling errors such as lights and equipment left on during unoccupied hours. This project developed a generic infrastructure for performance monitoring, diagnostics, and control, applicable to a broad range of building systems and equipment, but targeted specifically to small to medium commercial buildings (an underserved market segment). The proposed solution is based on two wireless technologies. The first, wireless telemetry, is used for cell phones and paging and is reliable and widely available. This risk proved to be easily managed during the project. The second technology is on-site wireless communication for acquiring data from sensors and transmitting control signals. The technology must enable communication with many nodes, overcome physical obstructions, operate in environments with other electrical equipment, support operation with on-board power (instead of line power) for some applications, operate at low transmission power in license-free radio bands, and be low cost. We proposed wireless mesh networking to meet these needs. This technology is relatively new and has been applied only in research and tests. This proved to be a major challenge for the project and was ultimately abandoned in favor of a directly wired solution for collecting sensor data at the building. The primary reason for this was the relatively short ranges at which we were able to effectively place the sensor nodes from the central receiving unit. Several different mesh technologies were attempted with similar results. Two hardware devices were created during the original performance period of the project. The first device, the WEB-MC, is a master control unit that has two radios, a CPU, memory, and serves as the central communications device for the WEB-MC System (Currently called the 'BEST Wireless HVAC Maintenance System' as a tentative commercial product name). The WEB-MC communicates with the local mesh network system via one of its antennas. Communication with the mesh network enables the WEB-MC to configure the network, send/receive data from individual motes, and serves as the primary mechanism for collecting sensor data at remote locations. The second antenna enables the WEB-MC to connect to a cellular network ('Long-Haul Communications') to transfer data to and from the NorthWrite Network Operations Center (NOC). A third 'all-in-one' hardware solution was created after the project was extended (Phase 2) and additional resources were provided. The project team leveraged a project funded by the State of Washington to develop a hardware solution that integrated the functionality of the original two devices. The primary reason for this approach was to eliminate the mesh network technical difficulties that severely limited the functionality of the original hardware approach. There were five separate software developments required to deliver the functionality needed for this project. These include the Data Server (or Network Operations Center), Web Application, Diagnostic Software, WEB-MC Embedded Software, Mote Embedded Software. Each of these developments was necessarily dependent on the others. This resulted in a challenging management task - requiring high bandwidth communications among

Patrick O'Neill

2009-06-30T23:59:59.000Z

236

Time Synchronization in Hierarchical TESLA Wireless Sensor Networks  

SciTech Connect

Time synchronization and event time correlation are important in wireless sensor networks. In particular, time is used to create a sequence events or time line to answer questions of cause and effect. Time is also used as a basis for determining the freshness of received packets and the validity of cryptographic certificates. This paper presents secure method of time synchronization and event time correlation for TESLA-based hierarchical wireless sensor networks. The method demonstrates that events in a TESLA network can be accurately timestamped by adding only a few pieces of data to the existing protocol.

Jason L. Wright; Milos Manic

2009-08-01T23:59:59.000Z

237

A Key-Distribution Scheme for Wireless Home Automation Networks  

E-Print Network (OSTI)

Wireless home automation networks are one example of how wireless technologies may soon become part of our daily life, yet security in existing products is woefully inadequate. An important problem in this area is the question of secure key distribution. In this paper we present a key-distribution scheme geared towards home automation networks, but applicable to other networks with related properties as well. Our approach uses a decentralized scheme that is designed to work on resource-poor devices, allows easy addition and removal of devices and limits the workload on the end user while guaranteeing the secrecy of the exchanged keys even in the presence of subverted nodes.

Arno Wacker; Timo Heiber; Holger Cermann

2004-01-01T23:59:59.000Z

238

FEMP Technology Brief: Wireless Sensor Networks for Data Centers |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wireless Sensor Networks for Data Centers Wireless Sensor Networks for Data Centers FEMP Technology Brief: Wireless Sensor Networks for Data Centers October 7, 2013 - 9:15am Addthis The geometrical arrangement of your server rack in a data center to optimize heat removal can dramatically lower cooling and fan power needs. Server rack configuration in the Data Center at the National Renewable Energy Laboratory (NREL) Research Support Facility. Photo credit: NREL PIX 18784 The waste heat emitted from institutional data center servers can be removed more efficiently when design considerations are evaluated and innovative monitoring sensor networks are installed for verification and measurement. Hot aisle containment system in the Data Center at the NREL Research Support Facility. Photo credit: NREL PIX 18780

239

FEMP Technology Brief: Wireless Sensor Networks for Data Centers |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

FEMP Technology Brief: Wireless Sensor Networks for Data Centers FEMP Technology Brief: Wireless Sensor Networks for Data Centers FEMP Technology Brief: Wireless Sensor Networks for Data Centers October 7, 2013 - 9:15am Addthis The geometrical arrangement of your server rack in a data center to optimize heat removal can dramatically lower cooling and fan power needs. Server rack configuration in the Data Center at the National Renewable Energy Laboratory (NREL) Research Support Facility. Photo credit: NREL PIX 18784 The waste heat emitted from institutional data center servers can be removed more efficiently when design considerations are evaluated and innovative monitoring sensor networks are installed for verification and measurement. Hot aisle containment system in the Data Center at the NREL Research Support Facility. Photo

240

A dynamic reconfigurable routing framework for wireless sensor networks  

Science Conference Proceedings (OSTI)

Sensornet deployments of the future are expected to deliver a multitude of services, ranging from reliable sensing, real time streams, mission critical support, network reprogramming and so on. Naturally, no one routing protocol can sufficiently cater ... Keywords: Dynamic routing, Multi-hop routing, Wireless sensor networks

Mukundan Venkataraman; Mainak Chatterjee; Kevin Kwiat

2011-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Latency of wireless sensor networks with uncoordinated power saving mechanisms  

Science Conference Proceedings (OSTI)

We consider a wireless sensor network, where nodes switch between an active (on) and a sleeping (off) mode, to save energy. The basic assumptions are that the on/off schedules are completely uncoordinated and that the sensors are distributed according ... Keywords: continuum percolation, first passage percolation, sensor networks

Olivier Dousse; Petteri Mannersalo; Patrick Thiran

2004-05-01T23:59:59.000Z

242

IDEA: integrated distributed energy awareness for wireless sensor networks  

Science Conference Proceedings (OSTI)

Energy in sensor networks is a distributed, non-transferable resource. Over time, differences in energy availability are likely to arise. Protocols like routing trees may concentrate energy usage at certain nodes. Differences in energy harvesting arising ... Keywords: optimization, resource distribution, resource management, wireless sensor networks

Geoffrey Werner Challen; Jason Waterman; Matt Welsh

2010-06-01T23:59:59.000Z

243

Distributed Energy-Efficient Hierarchical Clustering for Wireless Sensor Networks  

E-Print Network (OSTI)

Distributed Energy-Efficient Hierarchical Clustering for Wireless Sensor Networks Ping Ding, Jo important. In this paper, we propose a distributed weight-based energy-efficient hierarchical clustering of the network topology. Younis and Fahmy [4] propose a Hybrid Energy-Efficient Distributed clustering (HEED

Holliday, JoAnne

244

Prius: generic hybrid trace compression for wireless sensor networks  

Science Conference Proceedings (OSTI)

Several diagnostic tracing techniques (e.g., event, power, and control-flow tracing) have been proposed for run-time debugging and postmortem analysis of wireless sensor networks (WSNs). Traces generated by such techniques can become large, defying the ... Keywords: compression, sensor networks, tracing

Vinaitheerthan Sundaram; Patrick Eugster; Xiangyu Zhang

2012-11-01T23:59:59.000Z

245

Charging and Pricing in Multi-Service Wireless Networks  

E-Print Network (OSTI)

Charging and Pricing in Multi-Service Wireless Networks Henrik Franzén Master Thesis Stockholm This master thesis analyses different factors that affect the process of charging and pricing for services. The most crucial point is perhaps not how to charge for the network activity, but how to price it

Maguire Jr., Gerald Q.

246

Supporting vehicular mobility in urban multi-hop wireless networks  

Science Conference Proceedings (OSTI)

Deployments of city-wide multi-hop 802.11 networks introduce challenges for maintaining client performance at vehicular speeds. We experimentally demonstrate that current network interfaces employ policies that result in long outage durations, even when ... Keywords: ap quality scoring, differential capacity handoff, handoff timescale, mesh, roaming, throughput outage, urban, vehicular, wireless

Anastasios Giannoulis; Marco Fiore; Edward W. Knightly

2008-06-01T23:59:59.000Z

247

Optimized query routing trees for wireless sensor networks  

Science Conference Proceedings (OSTI)

In order to process continuous queries over Wireless Sensor Networks (WSNs), sensors are typically organized in a Query Routing Tree (denoted as T) that provides each sensor with a path over which query results can be transmitted to the querying node. ... Keywords: Critical path method, Query routing trees, Sensor networks

Panayiotis Andreou; Demetrios Zeinalipour-Yazti; Andreas Pamboris; Panos K. Chrysanthis; George Samaras

2011-04-01T23:59:59.000Z

248

Intrusion detection of sinkhole attacks in wireless sensor networks  

Science Conference Proceedings (OSTI)

In this paper, we present an Intrusion Detection System designed for wireless sensor networks and show how it can be configured to detect Sinkhole attacks. A Sinkhole attack forms a serious threat to sensor networks. We study in depth this attack by ...

Ioannis Krontiris; Tassos Dimitriou; Thanassis Giannetsos; Marios Mpasoukos

2007-07-01T23:59:59.000Z

249

Energy-efficient space-time coded cooperative routing in multihop wireless networks  

Science Conference Proceedings (OSTI)

Due to the limited energy supplies of nodes in many applications like wireless sensor networks, energy efficiency is crucial for extending the lifetime of these networks. This paper addresses the routing problem for outage-restricted multihop wireless ...

Behrouz Maham; Ravi Narasimhan; Are Hjørungnes

2009-11-01T23:59:59.000Z

250

Energy efficient networking via dynamic relay node selection in wireless networks  

Science Conference Proceedings (OSTI)

Mobile wireless ad hoc networks need to maximize their network lifetime (defined as the time until the first node runs out of energy). In the broadcast network lifetime problem, all nodes are sending broadcast traffic, and one asks for an assignment ... Keywords: Ad hoc networks, Average case analysis, Network lifetime, Random graphs

Maurits De Graaf

2013-05-01T23:59:59.000Z

251

Wearable wireless sensor network for the monitorisation of Parkinsonian patients using a novel mobility algorithm  

Science Conference Proceedings (OSTI)

Recent advances in the field of wireless sensor networks (WSN) include the creation of a new kind of these networks, called body sensor networks (BSN). These systems have been proven to be an enabling technology for the application domain ... Keywords: Parkinson', bioinformatics, body sensor networks, force sensors, gait analysis, healthcare technology, medical monitoring, monitorisation, network mobility, patient gaits, s disease, wearable WSNs, wearable computing, wireless networks, wireless sensor networks

Gonzalo Solas; Paul Bustamante; Karol Grandez; Erlantz Uriarte

2009-12-01T23:59:59.000Z

252

Applications of WiMAX-based wireless mesh network in monitoring wind farms  

Science Conference Proceedings (OSTI)

This paper has studied the feasibility of applying World Interoperability for Microwave Access (WiMAX) based Wireless Mesh Networks (WMNs) in monitoring wind farms. WMNs provide a dynamic topology which meets the requirements of communications ... Keywords: WMNs, WiMAX, World Interoperability for Microwave Access, communications, renewable energy, simulation, wind energy, wind farm monitoring, wind farms, wind power, wireless mesh networks, wireless networks

Gang Zheng; Hongbing Xu; Xinheng Wang; Jianxiao Zou

2010-09-01T23:59:59.000Z

253

An energy-efficient, transport-controlled MAC protocol for wireless sensor networks  

Science Conference Proceedings (OSTI)

In wireless sensor networks (WSNs), one major cause of wasted energy is that the wireless network interface is always on to accept possible traffic. Many medium access control (MAC) protocols therefore adopted a periodic listen-and-sleep scheme to save ... Keywords: Congestion control, Medium access control, Transport control, Wireless sensor network

Jaesub Kim; Kyu Ho Park

2009-07-01T23:59:59.000Z

254

The Packet Loss Effect on MPEG Video Transmission in Wireless Networks  

Science Conference Proceedings (OSTI)

The purpose of this paper is to study the packet loss effect on MPEG video transmission quality in wireless networks. First, we consider the distribution of packet losses in wireless network, including distributed and burst packet losses. Besides, we ... Keywords: MPEG, wireless network, packet loss.

Cheng-Han Lin; Chih-Heng Ke; Ce-Kuen Shieh; Naveen K. Chilamkurti

2006-04-01T23:59:59.000Z

255

PowerTOSSIM z: realistic energy modelling for wireless sensor network environments  

Science Conference Proceedings (OSTI)

Energy continues to be the key constraint in wireless sensor networks. We review existing methods for estimating software power consumption and battery modelling, as applied to embedded systems such as Wireless Sensor Networks. We consider current developments ... Keywords: MICAz, PowerTOSSIM, TOSSIM, TinyOS 2, energy model, non-linear battery model, wireless sensor networks

Enrico Perla; Art Ó Catháin; Ricardo Simon Carbajo; Meriel Huggard; Ciarán Mc Goldrick

2008-10-01T23:59:59.000Z

256

Quantifying the channel quality for interference-aware wireless sensor networks  

Science Conference Proceedings (OSTI)

Reliability of communications is key to expand application domains for sensor networks. Since Wireless Sensor Networks (WSN) operate in the license-free Industrial Scientific and Medical (ISM) bands and hence share the spectrum with other wireless technologies, ... Keywords: ISM bands, channel quality, dynamic resource adaptation, interference, wireless sensor networks

Claro Noda; Shashi Prabh; Mário Alves; Carlo Alberto Boano; Thiemo Voigt

2011-12-01T23:59:59.000Z

257

Using ant-based agents for congestion control in ad-hoc wireless sensor networks  

Science Conference Proceedings (OSTI)

Ad-hoc wireless sensor networks suffer from problems of congestion, which lead to packet loss and excessive energy consumption. In this paper, we address the issue of congestion in these networks. We propose a new routing protocol for wireless sensor ... Keywords: Ad hoc wireless sensor networks, Ant-based agents, Congestion control, Routing

Sanjay K. Dhurandher; Sudip Misra; Harsh Mittal; Anubhav Agarwal; Isaac Woungang

2011-03-01T23:59:59.000Z

258

Wireless networking security: open issues in trust, management, interoperation and measurement  

Science Conference Proceedings (OSTI)

The pervasive availability and wide usage of wireless networks with different kinds of topologies, techniques and protocol suites have brought with them a need to improve security mechanisms. The design, development and evaluation of security techniques ... Keywords: interoperation, management, measurement, network security, open security, trust, wireless networks, wireless security

Joseph B. Evans; Weichao Wang; Benjamin J. Ewy

2006-09-01T23:59:59.000Z

259

NetTopo: A framework of simulation and visualization for wireless sensor networks  

Science Conference Proceedings (OSTI)

Network simulators are necessary for testing algorithms of large scale wireless sensor networks (WSNs), but lack the accuracy of real-world deployments. Deploying real WSN testbed provides a more realistic test environment, and allows users to get more ... Keywords: NetTopo, Research framework, Simulation, Visualization, Wireless sensor networks, Wireless testbed

Lei Shu; Manfred Hauswirth; Han-Chieh Chao; Min Chen; Yan Zhang

2011-07-01T23:59:59.000Z

260

ERTP: Energy-efficient and Reliable Transport Protocol for data streaming in Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Emerging data streaming applications in Wireless Sensor Networks require reliable and energy-efficient Transport Protocols. Our recent Wireless Sensor Network deployment in the Burdekin delta, Australia, for water monitoring [T. Le Dinh, W. Hu, P. Sikka, ... Keywords: Energy-efficiency, Reliability, Transport protocol, Wireless Sensor Network

Tuan Le; Wen Hu; Peter Corke; Sanjay Jha

2009-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Modeling overall energy consumption in Wireless Sensor Networks  

E-Print Network (OSTI)

Minimizing the energy consumption of a wireless sensor network application is crucial for effective realization of the intended application in terms of cost, lifetime, and functionality. However, the minimizing task is hardly possible as no overall energy cost function is available for optimization. Optimizing a specific component of the total energy cost does not help in reducing the total energy cost as this reduction may be negated by an increase in the energy consumption of other components of the application. Recently we proposed Hierarchy Energy Driven Architecture as a robust architecture that takes into account all principal energy constituents of wireless sensor network applications. Based on the proposed architecture, this paper presents a single overall model and proposes a feasible formulation to express the overall energy consumption of a generic wireless sensor network application in terms of its energy constituents. The formulation offers a concrete expression for evaluating the performance of ...

Kamyabpour, Najmeh

2011-01-01T23:59:59.000Z

262

Network Aware Image Shaping for Low-Latency and Energy-Efficient Data Services over the Palm Wireless Network  

E-Print Network (OSTI)

With the introduction of next-generation wireless data services and increasing user demands for ubiquitous Internet access, there will be a growing demand for wireless handheld devices with multimedia communication capability. However, wireless multimedia communication has several bottlenecks, including limited bandwidth of cellular networks, dynamically varying wireless channel conditions, and processor/battery constrained handheld device.

Dong-Gi Lee; Debashis Panigrahi; Sujit Dey

2003-01-01T23:59:59.000Z

263

Recommended Practices Guide For Securing ZigBee Wireless Networks in  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Practices Guide For Securing ZigBee Wireless Networks Practices Guide For Securing ZigBee Wireless Networks in Process Control System Environments Recommended Practices Guide For Securing ZigBee Wireless Networks in Process Control System Environments This paper addresses design principles and best practices regarding the secure implementation and operation of ZigBee wireless networks. ZigBee is a protocol specification and industry standard for a type of wireless communications technology generically known as Low-Rate Wireless Personal Area Networks (LR-WPAN). Recommended Practices Guide For Securing ZigBee Wireless Networks in Process Control System Environments More Documents & Publications Wireless System Considerations When Implementing NERC Critical Infrastructure Protection Standards WA_04_069__EATON_CORPORATION_Waiver_of_Domestic_and_Foreign_.pdf

264

Towards robustness and energy efficiency of cut detection in wireless sensor networks  

Science Conference Proceedings (OSTI)

Reliable, full network connectivity in wireless sensor networks (WSN) is difficult to maintain. Awareness of the state of network connectivity is similarly challenging. Harsh, unattended, low-security environments and resource-constrained nodes exacerbate ... Keywords: Network cut detection, Topology control, Wireless sensor networks

Myounggyu Won; Stephen M. George; Radu Stoleru

2011-05-01T23:59:59.000Z

265

Latency-sensitive power control for wireless ad-hoc networks  

Science Conference Proceedings (OSTI)

We investigate the impact of power control on latency in wireless ad-hoc networks. If transmission power is increased, interference increases, thus reducing network capacity. A node sending/relaying delay-sensitive real-time application traffic can, ... Keywords: ad-hoc networks, latency, medium access control, network connectivity, power control, wireless networks

Mohamed R. Fouad; Sonia Fahmy; Gopal Pandurangan

2005-10-01T23:59:59.000Z

266

A power- and coverage-aware clustering scheme for wireless sensor networks  

Science Conference Proceedings (OSTI)

A common and critical operation for wireless sensor networks is data gathering. The efficient clustering of a sensor network that can save energy and improve coverage efficiency is an important requirement for many upper layer network functions. This ... Keywords: Wireless sensor networks, clustering, energy and coverage efficiency, high-uniformity, network lifetime

Liang Xue; Xin-Ping Guan; Zhi-Xin Liu; Qing-Chao Zheng

2010-11-01T23:59:59.000Z

267

Control-theoretic utility maximization in multihop wireless networks under mission dynamics  

Science Conference Proceedings (OSTI)

Both bandwidth and energy become important resource constraints when multihop wireless networks are used to transport high-data-rate traffic for a moderately long duration. In such networks, it is important to control the traffic rates to not only conform ... Keywords: bandwidth- and energy-constrained networks, network lifetime, utility optimization, wireless sensor network (WSN)

Sharanya Eswaran; Archan Misra; Thomas F. La Porta

2012-08-01T23:59:59.000Z

268

Routing Security Issues in Wireless Sensor Networks: Attacks and Defenses  

E-Print Network (OSTI)

Wireless Sensor Networks (WSNs) are rapidly emerging as an important new area in wireless and mobile computing research. Applications of WSNs are numerous and growing, and range from indoor deployment scenarios in the home and office to outdoor deployment scenarios in adversary's territory in a tactical battleground (Akyildiz et al., 2002). For military environment, dispersal of WSNs into an adversary's territory enables the detection and tracking of enemy soldiers and vehicles. For home/office environments, indoor sensor networks offer the ability to monitor the health of the elderly and to detect intruders via a wireless home security system. In each of these scenarios, lives and livelihoods may depend on the timeliness and correctness of the sensor data obtained from dispersed sensor nodes. As a result, such WSNs must be secured to prevent an intruder from obstructing the delivery of correct sensor data and from forging sensor data. To address the latter problem, end-to-end data integrity checksums and pos...

Sen, Jaydip

2011-01-01T23:59:59.000Z

269

TCPL: A Defense against wormhole attacks in wireless sensor networks  

Science Conference Proceedings (OSTI)

Do In this paper presents recent advances in technology have made low-cost, low-power wireless sensors with efficient energy consumption. A network of such nodes can coordinate among themselves for distributed sensing and processing of certain data. For which, we propose an architecture to provide a stateless solution in sensor networks for efficient routing in wireless sensor networks. This type of architecture is known as Tree Cast. We propose a unique method of address allocation, building up multiple disjoint trees which are geographically inter-twined and rooted at the data sink. Using these trees, routing messages to and from the sink node without maintaining any routing state in the sensor nodes is possible. In this paper, we introduce the wormhole attack, a severe attack in ad hoc networks that is particularly challenging to defend against. The wormhole attack is possible even if the attacker has not compromised any hosts and even if all communication provides authenticity and confidentiality. In the wormhole attack, an attacker records packets (or bits) at one location in the network, tunnels them to another location, and retransmits them there into the network. The wormhole attack can form a serious threat in wireless networks, especially against many sensor network routing protocols and location-based wireless security systems. For example, most existing ad hoc network routing protocols, without some mechanism to defend against the wormhole attack, would be unable to find routes longer than one or two hops, severely disrupting communication. We present a new, general mechanism, called packet leashes, for detecting and thus defending against wormhole attacks, and we present a specific protocol, called TIK, that implements leashes.

Kumar, K. E. Naresh [PG Student, Dept of Computer Science and Engineering, KBNCE, Gulbarga, Karnataka (India); Waheed, Mohd. Abdul [Asst. Professor, Dept of Computer Science and Engineering, KBNCE, Gulbarga, Karnataka (India); Basappa, K. Kari [Professor, Dept of E and CE, Dayanand College of Engineering, Banglore, Karnataka (India)

2010-10-26T23:59:59.000Z

270

Tight analysis of shortest path convergecast in wireless sensor networks  

Science Conference Proceedings (OSTI)

We consider the convergecast problem in wireless sensor networks where readings generated by each sensor node are to reach the sink. Since a sensor reading can usually be encoded in a few bytes, more than one reading can readily fit into a standard transmission ...

John Augustine, Qi Han, Philip Loden, Sachin Lodha, Sasanka Roy

2011-01-01T23:59:59.000Z

271

Low power wireless sensor networks in industrial environment  

Science Conference Proceedings (OSTI)

The current situation in Spanish municipal solid waste is a reason of concern for the society because the consumption habits of modern consumer lifestyles are causing a huge waste problem. Last investigations show generation of polluting emissions, not ... Keywords: MicaZ, heliomote, landfill monitoring, solid waste emissions, wireless sensor networks

Roberto Fernández-Martínez; J. Ordieres; A. Gonzalez-Marcos

2008-07-01T23:59:59.000Z

272

Protecting the sink location privacy in wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSNs) are widely deployed to collect data in military and civilian applications today. Due to the open nature of a WSN, it is relatively easy for an adversary to eavesdrop and trace packets in order to capture the receiver. ... Keywords: Location privacy, Receiver, Sink, WSN

Lin Yao, Lin Kang, Pengfei Shang, Guowei Wu

2013-06-01T23:59:59.000Z

273

Minimalist object oriented service discovery protocol for wireless sensor networks  

Science Conference Proceedings (OSTI)

This paper presents a new Service Discovery Protocol (SDP) suitable for Wireless Sensor Networks (WSN). The restrictions that are imposed by ultra low-cost sensor and actuators devices (basic components of a WSN) are taken into account to reach a minimal ...

D. Villa; F. J. Villanueva; F. Moya; F. Rincón; J. Barba; J. C. López

2007-05-01T23:59:59.000Z

274

Underground Coal Mine Monitoring with Wireless Sensor Networks  

E-Print Network (OSTI)

10 Underground Coal Mine Monitoring with Wireless Sensor Networks MO LI and YUNHAO LIU Hong Kong University of Science and Technology Environment monitoring in coal mines is an important application queries under instable circumstances. A prototype is deployed with 27 mica2 motes in a real coal mine. We

Liu, Yunhao

275

A new clustering scheme for wireless sensor networks  

Science Conference Proceedings (OSTI)

Energy consumption has always been the most serious issue to consider while deploying Wireless Sensor Networks (WSNs). Sensor nodes are limited in power, computational capacities and memory so reporting the occurring of specific events, such as fire ... Keywords: Opnet simulator, PMM, WSNs, cluster, event, mobile sink, sensor node model

Hajar Mousannif; Said Rakrak; Hassan Al Moatassime

2010-11-01T23:59:59.000Z

276

A biologically-inspired clustering protocol for wireless sensor networks  

Science Conference Proceedings (OSTI)

Lately, wireless sensor networks are garnering a lot of interests, as it is feasible to deploy them in many ad hoc scenarios such as for earthquake monitoring, tsunami monitoring and battlefield surveillance. As sensor nodes may be deployed in hostile ... Keywords: Biologically-inspired, Clustering, Meta-heuristic, Routing, Simulations

S. Selvakennedy; S. Sinnappan; Yi Shang

2007-10-01T23:59:59.000Z

277

Hierarchical-Battery Aware Routing in Wireless Sensor Networks  

E-Print Network (OSTI)

Hierarchical-Battery Aware Routing in Wireless Sensor Networks Ravi Musunuri Jorge A. Cobb monitoring applications. Pulsed battery discharge from the nodes prolongs the battery capacity as compared to constant discharge. Idle time between the pulses of discharge helps in recovering the discharged battery

Cobb, Jorge Arturo

278

Energy Balancing Intrusion Detection System in Wireless Sensor Network  

Science Conference Proceedings (OSTI)

wireless sensor network (WSN) is vulnerable to a wide range of attacks due to deployment in the hostile ervironment and having limited resources. The security of WSN becomes a very important issue with the rapid development of WSN. Instrusion detection ... Keywords: WSN, Energy-effiency, Clustering, IDS

Chunyan Peng; Bing Liu

2012-10-01T23:59:59.000Z

279

Experimental analysis and characterization of a wireless sensor network environment  

Science Conference Proceedings (OSTI)

Existing testbeds, even though rare and specialized, are not often exploited to their full potential. Data collected during experimentation are usually used to evaluate some specific tested aspect. To further benefit from the knowledge gathered on a ... Keywords: characterization, statistical analysis, testbeds, wireless sensor networks

Bogdan Pavkovic; Fabrice Theoleyre; Dominique Barthel; Andrzej Duda

2010-10-01T23:59:59.000Z

280

Combinatorial structures for design of wireless sensor networks  

Science Conference Proceedings (OSTI)

Combinatorial designs are very effective tools for managing keys in an infrastructure where power and memory are two major constraints. None of the present day wireless technologies takes the advantage of combinatorial designs. In this paper, we have ... Keywords: combinatorial design, key predistribution, projective plane, sensor network, transversal design

Dibyendu Chakrabarti; Jennifer Seberry

2006-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Low-cost group rekeying for unattended wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSNs) are made up of large groups of nodes that perform distributed monitoring services. Since sensor measurements are often sensitive data acquired in hostile environments, securing WSN becomes mandatory. However, WSNs consists ... Keywords: GKM, Rekeying, Security, Sensors, WSN

Juan Hernández-Serrano; Juan Vera-Del-Campo; Josep Pegueroles; Carlos Gañán

2013-01-01T23:59:59.000Z

282

A case for centrally controlled wireless sensor networks  

Science Conference Proceedings (OSTI)

In this article we present the Intelligent, Manageable, Power-Efficient and Reliable Internetworking Architecture (IMPERIA), a centrally managed architecture for large-scale wireless sensor networks (WSNs). We discuss the advantages of a centralized ... Keywords: Centrally managed, Clustering, MQTT-S, Scheduling, WSN

Urs Hunkeler, Clemens Lombriser, Hong Linh Truong, Beat Weiss

2013-04-01T23:59:59.000Z

283

Short-Term Solar Energy Forecasting Using Wireless Sensor Networks  

E-Print Network (OSTI)

Short-Term Solar Energy Forecasting Using Wireless Sensor Networks Stefan Achleitner, Tao Liu in power output is a major concern and forecasting is, therefore, a top priority. We propose a sensing infrastructure to enable sensing of solar irradiance with application to solar array output forecasting

Cerpa, Alberto E.

284

SWATS: Wireless sensor networks for steamflood and waterflood pipeline monitoring  

Science Conference Proceedings (OSTI)

State-of-the-art anomaly detection systems deployed in oilfields are expensive, not scalable to a large number of sensors, require manual operation, and provide data with a long delay. To overcome these problems, we design a wireless sensor network system ...

Sunhee Yoon; Wei Ye; J. Heidemann; B. Littlefield; C. Shahabi

2011-01-01T23:59:59.000Z

285

Adaptive Header Compression for Wireless Networks Changli Jiao  

E-Print Network (OSTI)

Adaptive Header Compression for Wireless Networks Changli Jiao Department of Electrical without compression. From the standpoint of the communication medium, the channel usage will be improved at a lower speed if the gap between ACKs is too big. This will have two side results. First, the efficiency

Richard III, Golden G.

286

ATPC: adaptive transmission power control for wireless sensor networks  

Science Conference Proceedings (OSTI)

Extensive empirical studies presented in this paper confirm that the quality of radio communication between low power sensor devices varies significantly with time and environment. This phenomenon indicates that the previous topology control solutions, ... Keywords: adaptive, feedback, link quality, transmission power control, wireless sensor network

Shan Lin; Jingbin Zhang; Gang Zhou; Lin Gu; John A. Stankovic; Tian He

2006-10-01T23:59:59.000Z

287

Decentralized control of adaptive sampling in wireless sensor networks  

Science Conference Proceedings (OSTI)

The efficient allocation of the limited energy resources of a wireless sensor network in a way that maximizes the information value of the data collected is a significant research challenge. Within this context, this article concentrates on adaptive ... Keywords: Adaptive sampling algorithm, Gaussian process regression, decentralized decision mechanism, information metric

Johnsen Kho; Alex Rogers; Nicholas R. Jennings

2009-05-01T23:59:59.000Z

288

Designing a Peer-to-Peer Wireless Network Confederation  

E-Print Network (OSTI)

We present the Peer-to-Peer Wireless Network Confederation (P2PWNC), a P2P system designed to enable the sharing of WLAN bandwidth among residential hotspots. The benefits of joining the Confederation outweigh the costs, and its token-based incentive mechanism prevents free-riding.

Elias Efstathiou And; Elias C. Efstathiou; George C. Polyzos

2003-01-01T23:59:59.000Z

289

Comparative Investigation for Energy Consumption of Different Chipsets Based on Scheduling for Wireless Sensor Networks  

E-Print Network (OSTI)

Rapid progress in microelectromechanical system (MEMS) and radio frequency (RF) design has enabled the development of low-power, inexpensive, and network-enabled microsensors. These sensor nodes are capable of capturing various physical information, such as temperature, pressure, motion of an object, etc as well as mapping such physical characteristics of the environment to quantitative measurements. A typical wireless sensor network (WSN) consists of hundreds to thousands of such sensor nodes linked by a wireless medium. In this paper, we present a comparative investigation of energy consumption for few commercially available chipsets such as TR1001, CC1000 and CC1010 based on different scheduling methods for two types of deployment strategies. We conducted our experiment within the OMNeT++ simulator.

Monica,; 10.5121/ijcnc.2010.2511

2010-01-01T23:59:59.000Z

290

Power control schemes in wireless sensor networks for homecare e-health applications  

Science Conference Proceedings (OSTI)

Power control is an important research topic for ad-hoc Wireless Sensor Networks (WSNs). In today's sophisticated and competitive wireless environment, the control of the energy consumption in a WSN for homecare e-health makes it possible to guarantee ... Keywords: homecare e-health, low-energy consumption, power control, wireless sensor networks

Nikolaos A. Pantazis; Dimitrios D. Vergados; Nikolaos I. Miridakis; Dimitrios J. Vergados

2008-07-01T23:59:59.000Z

291

Adapting Cognitive Radio Technology for Low-Power Wireless Personal Area Network Devices  

Science Conference Proceedings (OSTI)

The application of wireless personal area network (WPAN) and simple point-to-point wireless communication devices has increased drastically both in private household and in our workspaces in general over the last decade. Combined with the fact that the ... Keywords: Cognitive radio, Dynamic spectrum access, Low-power, Medium access control, RFIC, Transceiver architecture, Wireless personal area network

John Rohde; Thomas Skjødeberg Toftegaard

2011-05-01T23:59:59.000Z

292

Three-Dimensional Location-Based IPv6 Addressing for Wireless Sensor Networks in Smart Grid  

Science Conference Proceedings (OSTI)

Smart grid is one of the most important applications of the Internet of Things (IoT) for environmental sustainability and energy efficiency issues in recent years. IP-based wireless sensor networks (IP-WSNs) are considered as one of the promising wireless ... Keywords: Smart grid, Wireless Sensor Networks, Spatial IP, IPv6 address, Three dimensional spaces

Chih-Yung Cheng; Chi-Cheng Chuang; Ray-I Chang

2012-03-01T23:59:59.000Z

293

IDRA: A flexible system architecture for next generation wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks consist of embedded devices (sensor nodes), equipped with a low-power radio. They are used for many applications: from wireless building automation to e-health applications. However, due to the limited capabilities of sensor ... Keywords: Architecture, Energy efficiency, Experimental evaluation, Heterogeneity, Mobility, Protocol selection, QoS, Wireless sensor networks

Eli De Poorter; Evy Troubleyn; Ingrid Moerman; Piet Demeester

2011-08-01T23:59:59.000Z

294

Energy comparison and optimization of wireless body-area network technologies  

Science Conference Proceedings (OSTI)

Wireless body-area networks (WBANs) have revolutionized the way mobile and wearable computers communicate with their users and I/O devices. We investigate an energy-efficient wireless device driver for low-duty peripherals, sensors and other I/O devices ... Keywords: energy-efficient design, power consumption, wireless body-area network

Le Yan; Lin Zhong; Niraj K. Jha

2007-06-01T23:59:59.000Z

295

Automatic planning tool for deployment of indoor wireless local area networks  

Science Conference Proceedings (OSTI)

This paper presents an automatic planning software tool for indoor wireless networks. As a consequence of increasing number of wireless interface based systems, automation of deployments becomes actually relevant. There are a lot of parameters that influences ... Keywords: algorithms, network planning, wireless LAN

Mariano Molina García; Alfonso Fernandez-Durán; José I. Alonso

2009-06-01T23:59:59.000Z

296

A hardware/software simulation environment for energy harvesting wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSNs) consist of wirelessly communicating nodes with an autarkic power supply for each node. Typically, the consumable energy of these nodes is very limited. Energy harvesting systems (EHSs) can be used to extend the lifetime ... Keywords: energy harvesting, simulation environment, wireless sensor networks

Leander B. Hörmann; Philipp M. Glatz; Karima B. Hein; Christian Steger; Reinhold Weiss

2012-10-01T23:59:59.000Z

297

InRout - A QoS aware route selection algorithm for industrial wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks are a key enabling technology for industrial monitoring applications where the use of wireless infrastructure allows high adaptivity and low cost in terms of installation and retrofitting. To facilitate the move from the current ... Keywords: IEEE 802.15.4, Industrial, Quality of service, Reinforcement learning, Routing, Wireless sensor networks (WSNs)

Berta Carballido Villaverde; Susan Rea; Dirk Pesch

2012-05-01T23:59:59.000Z

298

Distributed backbone structure for algorithms in the SINR model of wireless networks  

Science Conference Proceedings (OSTI)

The Signal-to-Interference-and-Noise-Ratio (SINR) physical model is one of the most popular models of wireless networks. Despite of the vast amount of study done in design and analysis of centralized algorithms supporting wireless communication under ... Keywords: SINR, backbone structure, distributed algorithms, leader election, multi-message broadcast, wireless networks

Tomasz Jurdzinski; Dariusz R. Kowalski

2012-10-01T23:59:59.000Z

299

Prolonging the lifetime of wireless sensor networks using multi-level clustering and heterogeneity  

Science Conference Proceedings (OSTI)

Clustering in wireless sensor networks (WSNs) is an important technique to prolong lifetime of a WSN. This paper proposes energy efficient multi-level clustering scheme called Power Aware Multi-level Clustering (PAMC) for homogeneous wireless sensor ... Keywords: algorithm, energy efficiency, heterogeneity, multi-level clustering, wireless sensor networks

Surender Soni; Vivek Katiyar

2011-02-01T23:59:59.000Z

300

Topology and routing optimization for congestion minimization in optical wireless networks  

Science Conference Proceedings (OSTI)

Optical wireless networks have appealing features such as very high broadband data rates and cost effectiveness. They represent a potential alternative to the last mile (first mile) wireless access problem. However, they are also highly vulnerable to ... Keywords: Mixed integer linear programming, Optical wireless, Routing, Survivable networks, Topology control

Iradj Ouveysi; Feng Shu; Wei Chen; Gangxiang Shen; Moshe Zukerman

2010-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

A utility-based fuzzy TOPSIS method for energy efficient network selection in heterogeneous wireless networks  

Science Conference Proceedings (OSTI)

Mobile terminals in 4G heterogeneous wireless networks continuously undergo horizontal and vertical handovers. In order for a mobile terminal to be connected to a network in the best possible way in terms of QoS performance and energy consumption, access ... Keywords: Energy efficiency, Fuzzy multiple criteria decision-making, Network selection, TOPSIS, Utility functions, Vertical handover

Ioannis Chamodrakas; Drakoulis Martakos

2012-07-01T23:59:59.000Z

302

A utility-based fuzzy TOPSIS method for energy efficient network selection in heterogeneous wireless networks  

Science Conference Proceedings (OSTI)

Mobile terminals in 4G heterogeneous wireless networks continuously undergo horizontal and vertical handovers. In order for a mobile terminal to be connected to a network in the best possible way in terms of QoS performance and energy consumption, access ... Keywords: Energy efficiency, Fuzzy multiple criteria decision-making, Network selection, TOPSIS, Utility functions, Vertical handover

Ioannis Chamodrakas; Drakoulis Martakos

2011-06-01T23:59:59.000Z

303

Evaluating the impact of network density, hidden nodes and capture effect for throughput guarantee in multi-hop wireless networks  

Science Conference Proceedings (OSTI)

To optimize the performance of wireless networks, one needs to consider the impact of key factors such as interference from hidden nodes, the capture effect, the network density and network conditions (saturated versus non-saturated). In this research, ... Keywords: Capture effect, Hidden nodes, Multi-hop wireless networks, Throughput guarantee

Haitao Zhao; Emiliano Garcia-Palacios; Shan Wang; Jibo Wei; Dongtang Ma

2013-01-01T23:59:59.000Z

304

Simple yet efficient, transparent airtime allocation for TCP in wireless mesh networks  

Science Conference Proceedings (OSTI)

In this paper, we explore a simple yet effective technique for explicitly allocating airtime to each active pair of communicating neighbors in a wireless neighborhood so that TCP starvation in a wireless mesh network is avoided. Our explicit allocation ...

Ki-Young Jang; Konstantinos Psounis; Ramesh Govindan

2010-11-01T23:59:59.000Z

305

Dynamic rate-control and scheduling algorithms for quality-of-service in wireless networks  

E-Print Network (OSTI)

Rapid growth of the Internet and multimedia applications, combined with an increasingly ubiquitous deployment of wireless systems, has created a huge demand for providing enhanced data services over wireless networks. ...

Zafer, Murtaza Abbasali, 1979-

2007-01-01T23:59:59.000Z

306

A Parallel Architecture for Network Control and Mobility Tracking in Wireless Systems  

Science Conference Proceedings (OSTI)

In a wireless system the network logically rearranges itself rapidly whenever terminals move from cell to cell. This ability to adapt itself to changing locations of its terminals adds a new layer of complexity to wireless control software. With ...

Abhaya Asthana; Paul Krzyzanowski

1997-03-01T23:59:59.000Z

307

Airblue : a highly-configurable FPGA-based platform for wireless network research  

E-Print Network (OSTI)

Over the past few years, researchers have developed many cross-layer wireless protocols to improve the performance of wireless networks. Experimental evaluations of these protocols require both high-speed simulations and ...

Ng, Man Cheuk, 1980-

2011-01-01T23:59:59.000Z

308

Consolidation of public safety wireless networks: An options-based economic analysis of numerous scenarios  

Science Conference Proceedings (OSTI)

The Korean National Emergency Management Agency proposed to replace existing public safety wireless networks of 46 agencies with a nation-wide consolidated network. This study compares the public-private partnership alternative of sharing a network with ... Keywords: Consolidation, Exploratory modeling, Feasibility study, Public safety wireless network, Public-private partnership, Real option analysis

Sungho Lee

2011-03-01T23:59:59.000Z

309

On the optimality of field-line routing in massively dense wireless multi-hop networks  

Science Conference Proceedings (OSTI)

We consider the load balancing problem in large wireless multi-hop networks by applying the continuum approximation. The task is to find routes, geometric curves, such that the maximal traffic load in the network is minimized. In finite fixed networks, ... Keywords: Load balancing, Multi-path, Single-path, Wireless multi-hop network

Esa Hyytiä; Jorma Virtamo

2009-03-01T23:59:59.000Z

310

Relay node placement in structurally damaged wireless sensor networks via triangular steiner tree approximation  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSNs) have many applications which operate in hostile environments. Due to the harsh surroundings, WSNs may suffer from a large scale damage that causes many nodes to fail simultaneously and the network to get partitioned into ... Keywords: Fault-tolerance, Network segmentation, Relay node placement, Wireless sensor networks

Fatih Senel; Mohamed Younis

2011-10-01T23:59:59.000Z

311

Developing an Efficient DMCIS with Next-Generation Wireless Networks  

E-Print Network (OSTI)

The impact of extreme events across the globe is extraordinary which continues to handicap the advancement of the struggling developing societies and threatens most of the industrialized countries in the globe. Various fields of Information and Communication Technology have widely been used for efficient disaster management; but only to a limited extent though, there is a tremendous potential for increasing efficiency and effectiveness in coping with disasters with the utilization of emerging wireless network technologies. Early warning, response to the particular situation and proper recovery are among the main focuses of an efficient disaster management system today. Considering these aspects, in this paper we propose a framework for developing an efficient Disaster Management Communications and Information System (DMCIS) which is basically benefited by the exploitation of the emerging wireless network technologies combined with other networking and data processing technologies.

Pathan, Al-Sakib Khan

2007-01-01T23:59:59.000Z

312

Frontal Rainfall Observation by a Commercial Microwave Communication Network  

Science Conference Proceedings (OSTI)

A novel approach for reconstruction of rainfall spatial–temporal dynamics from a wireless microwave network is presented. It employs a stochastic space–time model based on a rainfall advection model, assimilated using a Kalman filter. The ...

Artem Zinevich; Hagit Messer; Pinhas Alpert

2009-07-01T23:59:59.000Z

313

Wireless Communications and Networking Technologies for Smart Grid: Paradigms and Challenges  

E-Print Network (OSTI)

Smart grid, regarded as the next generation power grid, uses two-way flows of electricity and information to create a widely distributed automated energy delivery network. In this work we present our vision on smart grid from the perspective of wireless communications and networking technologies. We present wireless communication and networking paradigms for four typical scenarios in the future smart grid and also point out the research challenges of the wireless communication and networking technologies used in smart grid

Fang, Xi; Xue, Guoliang

2011-01-01T23:59:59.000Z

314

Review: Reinforcement learning for context awareness and intelligence in wireless networks: Review, new features and open issues  

Science Conference Proceedings (OSTI)

In wireless networks, context awareness and intelligence are capabilities that enable each host to observe, learn, and respond to its complex and dynamic operating environment in an efficient manner. These capabilities contrast with traditional approaches ... Keywords: Cognitive radio networks, Context awareness, Intelligence, Mobile ad hoc networks, Reinforcement learning, Wireless networks, Wireless sensor networks

Kok-Lim Alvin Yau; Peter Komisarczuk; Paul D. Teal

2012-01-01T23:59:59.000Z

315

An integrated mobility and traffic model for resource allocation in wireless networks  

Science Conference Proceedings (OSTI)

In a wireless communications network, the movement of mobile users presents significant technical challenges to providing efficient access to the wired broadband network. In this paper, we construct a new analytical/numerical model that characterizes ... Keywords: admission control, mobility, resource allocation, traffic modeling, wireless networks

Hisashi Kobayashi; Shun-Zheng Yu; Brian L. Mark

2000-08-01T23:59:59.000Z

316

Energy-efficient neighbor discovery protocol for mobile wireless sensor networks  

Science Conference Proceedings (OSTI)

Low energy consumption is a critical design requirement for most wireless sensor network (WSN) applications. Due to minimal transmission power levels, time-varying environmental factors and mobility of nodes, network neighborhood changes frequently. ... Keywords: Algorithm/protocol design and analysis, Low power design, Mobile computing, Wireless sensor networks

Mikko Kohvakka; Jukka Suhonen; Mauri Kuorilehto; Ville Kaseva; Marko Hännikäinen; Timo D. Hämäläinen

2009-01-01T23:59:59.000Z

317

A wireless sensor network design tool to support building energy management  

Science Conference Proceedings (OSTI)

The physical location of sensor nodes strongly influences the performance of the network from the perspective of accurate data sensing and reliable communication. Therefore deployment planning can be regarded as an essential stepping stone to producing ... Keywords: building management system, heterogeneous wireless network infrastructure, industry foundation classes, wireless sensor network design

Antony Guinard; Alan McGibney; Dirk Pesch

2009-11-01T23:59:59.000Z

318

The impact of a realistic packet traffic model on the performance of surveillance wireless sensor networks  

Science Conference Proceedings (OSTI)

It is quite common to see that classical periodic or Poisson packet traffic models are used for evaluating the performance of wireless sensor networks (WSNs). However, these models may not be appropriate for modeling the data traffic resulting from a ... Keywords: Intrusion detection applications, Packet traffic model, Surveillance sensor networks, Wireless sensor networks

Ilker Demirkol; Cem Ersoy; Fatih Alagöz; Hakan Deliç

2009-02-01T23:59:59.000Z

319

Broadcast routing in wireless sensor networks with dynamic power management and multi-coverage backbones  

Science Conference Proceedings (OSTI)

In a wireless sensor network (WSN), nodes are power constrained. As a consequence, protocols must be energy efficient to prolong the network lifetime while keeping some quality-of-service (QoS) requirements. In WSNs, most protocols resort to the broadcast ... Keywords: Battery capacity recovery, Battery model, Dynamic power management, Multi-coverage backbones, Topology control, Wireless sensor networks

Paulo Sérgio Sausen; Marco Aurélio Spohn; Angelo Perkusich

2010-03-01T23:59:59.000Z

320

Design and implementation of a socket-level bandwidth aggregation mechanism for wireless networks  

Science Conference Proceedings (OSTI)

This paper proposes a mechanism to aggregate bandwidth of multiple network interfaces on a computer. Recently one single computer entails multiple different wireless network interfaces, such as IEEE 802.11a/b/g/n, Bluetooth, WiMAX, and so on. They can ... Keywords: bandwidth aggregation, heterogeneous wireless networks, multi-homed mobile host

Hiroshi Sakakibara; Masato Saito; Hideyuki Tokuda

2006-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Programming wireless sensor networks: Fundamental concepts and state of the art  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSNs) are attracting great interest in a number of application domains concerned with monitoring and control of physical phenomena, as they enable dense and untethered deployments at low cost and with unprecedented flexibility. ... Keywords: Wireless sensor networks, middleware, networked embedded systems, programming abstractions

Luca Mottola; Gian Pietro Picco

2011-04-01T23:59:59.000Z

322

On compressing data in wireless sensor networks for energy efficiency and real time delivery  

Science Conference Proceedings (OSTI)

Wireless sensor networks possess significant limitations in storage, bandwidth, processing, and energy. Additionally, real-time sensor network applications such as monitoring poisonous gas leaks cannot tolerate high latency. While some good data compression ... Keywords: Compression, Latency, Real-time, Wireless sensor network

Tommy Szalapski; Sanjay Madria

2013-06-01T23:59:59.000Z

323

An efficient reliable broadcasting protocol for wireless mobile ad hoc networks  

Science Conference Proceedings (OSTI)

The mobile ad hoc network (MANET) has recently been recognized as an attractive network architecture for wireless communication. Reliable broadcast is an important operation in MANET (e.g., giving orders, searching routes, and notifying important signals). ... Keywords: Broadcast storm, Mobile ad hoc network (MANET), Mobile computing, Reliable broadcast, Wireless communication

Chih-Shun Hsu; Yu-Chee Tseng; Jang-Ping Sheu

2007-04-01T23:59:59.000Z

324

A learning automata based scheduling solution to the dynamic point coverage problem in wireless sensor networks  

Science Conference Proceedings (OSTI)

The dynamic point coverage problem in wireless sensor networks is to detect some moving target points in the area of the network using as few sensor nodes as possible. One way to deal with this problem is to schedule sensor nodes in such a way that a ... Keywords: Dynamic point coverage, Learning automata, Scheduling, Wireless sensor network

M. Esnaashari; M. R. Meybodi

2010-10-01T23:59:59.000Z

325

EECHE: energy-efficient cluster head election protocol for heterogeneous wireless sensor networks  

Science Conference Proceedings (OSTI)

A wireless sensor network with a large number of tiny sensor nodes can be used as an effective tool for gathering data in various situations. One of the major issues in wireless sensor network is developing an energy-efficient routing protocol which ... Keywords: clustering, energy efficient, heterogeneous, lifetime, sensor networks

Dilip Kumar; T. C. Aseri; R. B Patel

2009-01-01T23:59:59.000Z

326

Nodes organization for channel assignment with topology preservation in multi-radio wireless mesh networks  

Science Conference Proceedings (OSTI)

The wireless mesh network is a new emerging broadband technology providing the last-mile Internet access for mobile users by exploiting the advantage of multiple radios and multiple channels. The throughput improvement of the network relies heavily on ... Keywords: Channel assignment, Multiple channels, Multiple radios, Particle swarm optimization algorithm, Wireless mesh networks

Hongju Cheng; Naixue Xiong; Athanasios V. Vasilakos; Laurence Tianruo Yang; Guolong Chen; Xiaofang Zhuang

2012-07-01T23:59:59.000Z

327

On the wireless local area network design problem with performance guarantees  

Science Conference Proceedings (OSTI)

In this paper, we propose a model for the wireless local area network (WLAN) design problem with performance guarantees. This problem consists of selecting the location of the access points (APs) as well as the power and the channel of each AP. The performance ... Keywords: Mathematical model, Network design and planning, Tabu search, Wireless local area network (WLAN)

Abderraouf Bahri; Steven Chamberland

2005-08-01T23:59:59.000Z

328

An evolutionary framework for routing protocol analysis in wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless Sensor Networks (WSNs) are widely adopted for applications ranging from surveillance to environmental monitoring. While powerful and relatively inexpensive, they are subject to behavioural faults which make them unreliable. Due to the complex ... Keywords: anomaly detection, evolutionary algorithms, network efficiency, routing protocols, wireless sensor networks

Doina Bucur; Giovanni Iacca; Giovanni Squillero; Alberto Tonda

2013-04-01T23:59:59.000Z

329

Controlled and self-organized routing for large-scale wireless sensor networks  

Science Conference Proceedings (OSTI)

Improving the scalability and robustness of wireless sensor networks is an important task, and much research on self-organization has been conducted toward this end. However, desired behavior is not yet guaranteed in much larger networks based on pure ... Keywords: Self-organization, controlled self-organization, robustness, scalability, wireless sensor networks

Daichi Kominami, Masashi Sugano, Masayuki Murata, Takaaki Hatauchi

2013-11-01T23:59:59.000Z

330

Energy-aware Gateway Selection for Increasing the Lifetime of Wireless Body Area Sensor Networks  

Science Conference Proceedings (OSTI)

A Wireless Body Area Sensor Network (WBASN) is composed of a set of sensor nodes, placed on, near or within a human body. WBASNs opt to continuously monitor the health conditions of individuals under medical risk, e.g., elders and chronically ill people, ... Keywords: Energy harvesting, Gateway selection algorithm, Network lifetime, Selective engagement of nodes, Wireless Body Area Sensor Networks (WBASN)

Cuneyt Bayilmis; Mohamed Younis

2012-06-01T23:59:59.000Z

331

Survey Focal design issues affecting the deployment of wireless sensor networks for pipeline monitoring  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSNs) are a target technology for oil and gas pipeline monitoring because they offer benefits of low cost, ease of deployment and ability to cater for data acquisition at great spatial and temporal scales. In order for WSN to ... Keywords: Energy harvesting, Localization, Network reliability, Oil and gas pipeline monitoring, Power efficiency, Sensing modality, Wireless sensor networks

Gbenga Owojaiye; Yichuang Sun

2013-05-01T23:59:59.000Z

332

A memetic algorithm for optimal dynamic design of wireless sensor networks  

Science Conference Proceedings (OSTI)

We present a memetic algorithm that dynamically optimizes the design of a wireless sensor network towards energy conservation and extension of the life span of the network, taking into consideration application-specific requirements, communication constraints ... Keywords: Design optimization, Energy conservation, Memetic algorithms, Wireless sensor networks

Konstantinos P. Ferentinos; Theodore A. Tsiligiridis

2010-02-01T23:59:59.000Z

333

Blind Adaptive Weighted Aggregation Scheme for Event Detection in Multihop Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

The problem of decision fusion for event detection in Wireless Sensor Networks is the prime focus of this paper. Our proposed algorithm focuses on single hop (star) and multihop (tree) topologies, which are commonly deployed wireless sensor network topologies. ... Keywords: Adaptive aggregation, Distributed detection, Sensor network

Bhushan G. Jagyasi; Deepthi Chander; U. B. Desai; S. N. Merchant; Bikash K. Dey

2011-06-01T23:59:59.000Z

334

Stability Problems of Transport of Event Data in Realistic Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

In general, wireless sensor networks have a certain degree of spatial redundancy, which means that a high number of nodes can sense the same event at the same time. This redundancy permits to simplify both MAC protocol and the transport of sensed data. ... Keywords: Data Transport, Distortion, Event Detection, Multi-hop Networks, Path stability, Shadowing, Stability, Wireless Sensor Networks, ns-2 Simulations

Giuseppe De Marco; Leonard Barolli

2008-04-01T23:59:59.000Z

335

On the feasibility of the link abstraction in wireless mesh networks  

Science Conference Proceedings (OSTI)

Outdoor community mesh networks based on IEEE 802.11 have seen tremendous growth in the recent past. The current understanding is that wireless link performance in these settings is inherently unpredictable, due to multipath delay spread. Consequently, ... Keywords: IEEE 802.11, IEEE 802.15.4, WiFi, interference, link abstraction, link-level measurements, rural networks, wireless mesh networks

Bhaskaran Raman; Kameswari Chebrolu; Dattatraya Gokhale; Sayandeep Sen

2009-04-01T23:59:59.000Z

336

Synchronous Ultra-Wide Band Wireless Sensors Networks for oil and gas exploration  

E-Print Network (OSTI)

Synchronous Ultra-Wide Band Wireless Sensors Networks for oil and gas exploration Stefano Savazzi1 of new oil and gas reservoir. Seismic exploration requires a large number (500 ÷ 2000 nodes, MAC and network layer to develop wireless sensors networks tailored for oil (and gas) exploration

Savazzi, Stefano

337

IEEE/ACM TRANSACTIONS ON NETWORKING 1 Optimizing 802.11 Wireless Mesh Networks Based  

E-Print Network (OSTI)

IEEE/ACM TRANSACTIONS ON NETWORKING 1 Optimizing 802.11 Wireless Mesh Networks Based on Physical channel state, for example, by com- paring the measured on-air received energy in a channel against Manuscript received August 15, 2007; revised April 11, 2008 and April 11, 2008; approved by IEEE/ACM

Roy, Sumit

338

Research and design of meter reading system based on ZigBee wireless sensor network  

Science Conference Proceedings (OSTI)

With the rapid development of wireless technologies, it is possible for Chinese automatic meter reading system (AMRS) to be equipped with wireless sensor networks due to their low-cost, simplicity and mobility. In the current study, we compared the advantages ... Keywords: IEEE802.15.4, JN5121, ZigBee, profile, wireless meter reading

Dechao Sun; Shaohua Zheng

2009-01-01T23:59:59.000Z

339

Wireless connection instructions -Windows This document outlines the procedure for setting up Windows7, Vista or XP to use the College wireless network. It assumes  

E-Print Network (OSTI)

Wireless connection instructions - Windows This document outlines the procedure for setting up Windows7, Vista or XP to use the College wireless network. It assumes that you have already connected your Wireless Networks window Registering your computer Start your web browser, ie. Internet Explorer Your

Goldschmidt, Christina

340

CEMA: Comfort Control and Energy Management Algorithms for Use in Residential Spaces Through Wireless Sensor Networks .  

E-Print Network (OSTI)

??In recent years, many strides have been achieved in the area of Wireless Sensor Networks (WSNs), which is leading to constant innovations in the types… (more)

Henry, Rami F.Z.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

An energy harvesting aware data dissemination strategy for energy rechargeable wireless sensor networks.  

E-Print Network (OSTI)

??A wireless sensor network (WSN) is often deployed in a harsh or hard-reach area and is required to operate for a long period time to… (more)

Gosavi, Amit

2012-01-01T23:59:59.000Z

342

(An Evolution Scheme of the Military Surveillance System Using Wireless Sensor Network)  

E-Print Network (OSTI)

)' , . . , , 24 . , , , UAV(Unmanned Air Vehicle), CCTV Energy-Efficient MAC Protocol for Wireless Sensor Networks," In Proc. ACM Sensys 2003, Nov. 2003. [11] W

343

Quality of Service for Wireless Sensor Networks in Smart Grid Applications .  

E-Print Network (OSTI)

??Monitoring and controlling smart grid assets in a timely and reliable manner is highly desired for emerging smart grid applications. Wireless Sensor Networks (WSNs) are… (more)

Al-Anbagi, Irfan

2013-01-01T23:59:59.000Z

344

Interference-Aware Fair Rate Control in Wireless Sensor Networks  

E-Print Network (OSTI)

In a wireless sensor network of N nodes transmitting data to a single base station, possibly over multiple hops, what distributed mechanisms should be implemented in order to dynamically allocate fair and efficient transmission rates to each node? Our interference-aware fair rate control (IFRC) detects incipient congestion at a node by monitoring the average queue length, communicates congestion state to exactly the set of potential interferers using a novel low-overhead congestion sharing mechanism, and converges to a fair and efficient rate using an AIMD control law. We evaluate IFRC extensively on a 40-node wireless sensor network testbed. IFRC achieves a fair and efficient rate allocation that is within 20- 40% of the optimal fair rate allocation on some network topologies. Its rate adaptation mechanism is highly effective: we did not observe a single instance of queue overflow in our many experiments. Finally, IFRC can be extended easily to support situations where only a subset of the nodes transmit, where the network has multiple base stations, or where nodes are assigned different transmission weights.In a wireless sensor network of N nodes transmitting data to a single base station, possibly over multiple hops, what distributed mechanisms should be implemented in order to dynamically allocate fair and efficient transmission rates to each node? Our interference-aware fair rate control (IFRC) detects incipient congestion at a node by monitoring the average queue length, communicates congestion state to exactly the set of potential interferers using a novel low-overhead congestion sharing mechanism, and converges to a fair and efficient rate using an AIMD control law. We evaluate IFRC extensively on a 40-node wireless sensor network testbed. IFRC achieves a fair and efficient rate allocation that is within 20- 40% of the optimal fair rate allocation on some network topologies. Its rate adaptation mechanism is highly effective: we did not observe a single instance of queue overflow in our many experiments. Finally, IFRC can be extended easily to support situations where only a subset of the nodes transmit, where the network has multiple base stations, or where nodes are assigned different transmission weights.

Sumit Rangwala; Ramakrishna Gummadi; Ramesh Govindan; Konstantinos Psounis

2006-01-01T23:59:59.000Z

345

Wireless Sensor Networks for Underwater Localization: A Survey  

E-Print Network (OSTI)

Autonomous Underwater Vehicles (AUVs) have widely deployed in marine investigation and ocean exploration in recent years. As the fundamental information, their position information is not only for data validity but also for many real-world applications. Therefore, it is critical for the AUV to have the underwater localization capability. This report is mainly devoted to outline the recent advancement of Wireless Sensor Networks (WSN) based underwater localization. Several classic architectures designed for Underwater Acoustic Sensor Network (UASN) are briefly introduced. Acoustic propagation and channel models are described and several ranging techniques are then explained. Many state-of-the-art underwater localization algorithms are introduced, followed by the outline of some

Sen Wang; Huosheng Hu

2012-01-01T23:59:59.000Z

346

RECA: a ring-structured energy-efficient clustering architecture for robust communication in wireless sensor networks  

Science Conference Proceedings (OSTI)

Clustering methods have shown their promising effects in the conservation of energy in Wireless Sensor Networks (WSNs). In this paper, we present a Ring-structured Energy-efficient Clustering Architecture (RECA) for WSNs to prolong ... Keywords: WSNs, cluster head management, energy efficiency, load balancing algorithms, network lifetime, ring-structured clustering, simulation, wireless networks, wireless sensor networks

Guanfeng Li; Taieb Znati

2007-04-01T23:59:59.000Z

347

Design and initial deployment of the wireless local area networking infrastructure at Sandia National Laboratories.  

SciTech Connect

A major portion of the Wireless Networking Project at Sandia National Laboratories over the last few years has been to examine IEEE 802.11 wireless networking for possible use at Sandia and if practical, introduce this technology. This project team deployed 802.11a, b, and g Wireless Local Area Networking at Sandia. This report examines the basics of wireless networking and captures key results from project tests and experiments. It also records project members thoughts and designs on wireless LAN architecture and security issues. It documents some of the actions and milestones of this project, including pilot and production deployment of wireless networking equipment, and captures the team's rationale behind some of the decisions made. Finally, the report examines lessons learned, future directions, and conclusions.

Long, John P.; Hamill, Michael J.; Mitchell, M. G.; Miller, Marc M.; Witzke, Edward L.; Wiener, Dallas J

2006-11-01T23:59:59.000Z

348

Complete Security Framework for Wireless Sensor Networks  

E-Print Network (OSTI)

Security concern for a Sensor Networks and level of security desired may differ according to application specific needs where the sensor networks are deployed. Till now, most of the security solutions proposed for sensor networks are layer wise i.e a particular solution is applicable to single layer itself. So, to integrate them all is a new research challenge. In this paper we took up the challenge and have proposed an integrated comprehensive security framework that will provide security services for all services of sensor network. We have added one extra component i.e. Intelligent Security Agent (ISA) to assess level of security and cross layer interactions. This framework has many components like Intrusion Detection System, Trust Framework, Key Management scheme and Link layer communication protocol. We have also tested it on three different application scenarios in Castalia and Omnet++ simulator.

Sharma, Kalpana; Kuldeep,

2009-01-01T23:59:59.000Z

349

Monitoring Energy Consumption In Wireless Sensor Networks  

E-Print Network (OSTI)

sequences of temperature maps. It is used to compare and evaluate beacon-less geographic routing algorithms information to divide the network into fixed square grids and nodes in each grid alternate between sleeping between dominating and dominated. ­ Transmission power control: The transmission power of the nodes

Turau, Volker

350

A High-Speed, Wireless Network for Ship-to-Ship and Ship-to-Shore Data Exchange  

Science Conference Proceedings (OSTI)

Wireless networking equipment was installed on three research vessels and at three shore stations during the 1998 Thin Layers Experiment in East Sound, Washington. This wireless network provided high-speed data communication between scientists on ...

Nathan D. Potter; Timothy J. Cowles

2000-07-01T23:59:59.000Z

351

Low-Cost, Robust, Threat-Aware Wireless Sensor Network for Assuring the Nation's Energy Infrastructure  

SciTech Connect

Eaton, in partnership with Oak Ridge National Laboratory and the Electric Power Research Institute (EPRI) has completed a project that applies a combination of wireless sensor network (WSN) technology, anticipatory theory, and a near-term value proposition based on diagnostics and process uptime to ensure the security and reliability of critical electrical power infrastructure. Representatives of several Eaton business units have been engaged to ensure a viable commercialization plan. Tennessee Valley Authority (TVA), American Electric Power (AEP), PEPCO, and Commonwealth Edison were recruited as partners to confirm and refine the requirements definition from the perspective of the utilities that actually operate the facilities to be protected. Those utilities have cooperated with on-site field tests as the project proceeds. Accomplishments of this project included: (1) the design, modeling, and simulation of the anticipatory wireless sensor network (A-WSN) that will be used to gather field information for the anticipatory application, (2) the design and implementation of hardware and software prototypes for laboratory and field experimentation, (3) stack and application integration, (4) develop installation and test plan, and (5) refinement of the commercialization plan.

Carols H. Rentel

2007-03-31T23:59:59.000Z

352

Employment of wireless sensor networks for full-scale ship application  

Science Conference Proceedings (OSTI)

In this study, basic experiments regarding the wireless sensor network were conducted on a 3,000-ton-class training ship as the first step in applying the ubiquitous technology to a real ship. Various application fields of the technology in terms of ... Keywords: WSN (wireless sensor network), monitoring, ship, ubiquitous, zigbee

Bu-Geun Paik; Seong-Rak Cho; Beom-Jin Park; Dongkon Lee; Jong-Hwui Yun; Byung-Dueg Bae

2007-12-01T23:59:59.000Z

353

Specification verification and validation of wireless sensor network model for environment monitoring  

Science Conference Proceedings (OSTI)

In this paper we propose methodology for modeling and development of wireless sensor network (WSN) application for monitoring, quantifying, verifying and validating organization GHG information. We have discussed preliminary activities and challenges ... Keywords: fault tolerance, formal methods, wireless sensor network (WSN)

R Jaichandran; A. Anthony Irudhayaraj

2011-12-01T23:59:59.000Z

354

APS: Distributed air pollution sensing system on Wireless Sensor and Robot Networks  

Science Conference Proceedings (OSTI)

Rapid emergence of Wireless Sensor and Robot Networks (WSRNs) contributes to the deployment of an environmental monitoring system. Three challenging issues are critical to design of an environmental monitoring system, including energy efficiency of sensors, ... Keywords: Energy efficiency, Environmental monitoring, Sensing region partition, Wireless Sensor and Robot Networks

Huai-Lei Fu; Hou-Chun Chen; Phone Lin

2012-05-01T23:59:59.000Z

355

Evaluation of Metadata-Based Data Aggregation Scheme in Clustering Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

In a wireless sensor network (WSN) system, an important problem for the special application, in which the battery of a sensor node cannot be exchanged, is how to extend the life time of the entire WSN system. In the past we proposed an improvement to ... Keywords: energy efficiency, power consumption, wireless sensor network

Yoshitsugu Obashi; Tomohiro Kokogawa; Yi Zheng; Huifang Chen; Hiroshi Mineno; Tadanori Mizuno

2007-09-01T23:59:59.000Z

356

Experiences in deploying a wireless mesh network testbed for traffic control  

Science Conference Proceedings (OSTI)

Wireless mesh networks (WMN) have attracted considerable interest in recent years as a convenient, flexible and low-cost alternative to wired communication infrastructures in many contexts. However, the great majority of research on metropolitan-scale ... Keywords: deployment, traffic control, wireless mesh network

Kun-chan Lan; Zhe Wang; Mahbub Hassan; Tim Moors; Rodney Berriman; Lavy Libman; Maximilian Ott; Bjorn Landfeldt; Zainab Zaidi

2007-10-01T23:59:59.000Z

357

Complex Event Detection in Extremely Resource-Constrained Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Complex Events are sequences of sensor measurements indicating interesting or unusual activity in the monitored process. Such events are ubiquitous in a wide range of Wireless Sensor Network (WSN) applications, yet there does not exist a common mechanism ... Keywords: complex event detection, integer techniques, wireless sensor networks

Michael Zoumboulakis; George Roussos

2011-04-01T23:59:59.000Z

358

QoS supporting and optimal energy allocation for a cluster based wireless sensor network  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSNs) have become a very active and important area of research due to their potential in civil and military applications. A lot of research works focus on energy efficient routing protocols due to the limited energy of battery-powered ... Keywords: Clustering, Data loss rate, Optimal energy allocation, QoS, Source-to-sink delay, Wireless sensor network

Shensheng Tang; Wei Li

2006-08-01T23:59:59.000Z

359

Original paper: ZigBee-based wireless sensor network localization for cattle monitoring in grazing fields  

Science Conference Proceedings (OSTI)

This paper presents the design of a localization scheme in wireless sensor networks (WSN) for cattle monitoring applications in grazing fields. No additional hardware was required for distance estimation since they were performed using the link quality ... Keywords: Cattle monitoring, Energy-efficient, Localization, Low-cost, Wireless sensor networks, ZigBee

Juan Ignacio Huircán; Carlos Muñoz; Héctor Young; Ludwig Von Dossow; Jaime Bustos; Gabriel Vivallo; Marcelo Toneatti

2010-11-01T23:59:59.000Z

360

On energy efficiency of geographic opportunistic routing in lossy multihop wireless networks  

Science Conference Proceedings (OSTI)

Geographic opportunistic routing (GOR) is an emerging technique that can improve energy efficiency in lossy multihop wireless networks. GOR makes local routing decision by using nodes' location information, and exploits the broadcast nature and spatial ... Keywords: Energy efficiency, Geographic opportunistic routing, Multihop wireless networks

Kai Zeng; Jie Yang; Wenjing Lou

2012-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Self-sustaining, efficient and forward-secure cryptographic constructions for Unattended Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Unattended Wireless Sensor Networks (UWSNs) operating in hostile environments face great security and performance challenges due to the lack of continuous real-time communication with the final data receivers (e.g., mobile data collectors). The lack ... Keywords: Aggregate signatures, Applied cryptography, Digital signatures, Forward security, Unattended Wireless Sensor Networks (UWSNs)

Attila Altay Yavuz; Peng Ning

2012-09-01T23:59:59.000Z

362

Utilizing Solar Power in Wireless Sensor Networks Thiemo Voigt, Hartmut Ritter, Jochen Schiller  

E-Print Network (OSTI)

Utilizing Solar Power in Wireless Sensor Networks Thiemo Voigt, Hartmut Ritter, Jochen Schiller propose to utilize solar power in wireless sensor networks, establishing a topology where ­ changing over show that both protocols provide significant energy savings when utilizing solar power. The paper shows

Voigt, Thiemo

363

PASES: An energy-aware design space exploration framework for wireless sensor networks  

Science Conference Proceedings (OSTI)

Energy consumption is one of the most constraining requirements for the development and implementation of wireless sensor networks. Many design aspects affect energy consumption, ranging from the hardware components, operations of the sensors, the communication ... Keywords: Design space exploration, Embedded systems, Energy aware, Platform based design, Wireless sensor networks

Ivan Minakov, Roberto Passerone

2013-09-01T23:59:59.000Z

364

A zone-based clustering method for ubiquitous robots based on wireless sensor networks  

Science Conference Proceedings (OSTI)

In this paper, we propose a topology configuration method for wireless sensor networks with an objective of well balancing energy consumption over all sensor nodes without generating any isolated sensor nodes. Our scheme has some attractive features: ... Keywords: clustering, routing, ubiquitous robots, wireless sensor network

Kyungmi Kim; Hyunsook Kim; Young Choi; Sukgyu Lee; Kijun Han

2006-10-01T23:59:59.000Z

365

An efficient data rate maximization algorithm for OFDM based wireless networks  

Science Conference Proceedings (OSTI)

In this paper we present a computationally efficient, suboptimal integer bit allocation algorithm that maximizes the overall data rate in multiuser orthogonal frequency division multiplexing (OFDM) systems implemented in wireless networks. Assuming the ... Keywords: Bit allocation algorithm, Multiuser OFDM system, Power allocation algorithm, QoS, Wireless networks

Željko Ili?; Alen Bažant; Borivoj Modlic

2010-01-01T23:59:59.000Z

366

Energy estimator for weather forecasts dynamic power management of wireless sensor networks  

Science Conference Proceedings (OSTI)

Emerging Wireless Sensor Networks (WSN) consist of spatially distributed autonomous sensors. Although an embedded battery has limited autonomy, most WSNs outperform this drawback by harvesting ambient energy from the environment. Nevertheless, this external ... Keywords: design tools, dynamic power management, weather forecasts, wireless sensor networks

Nicolas Ferry; Sylvain Ducloyer; Nathalie Julien; Dominique Jutel

2011-09-01T23:59:59.000Z

367

Energy-neutral scheduling and forwarding in environmentally-powered wireless sensor networks  

Science Conference Proceedings (OSTI)

In environmentally-powered wireless sensor networks (EPWSNs), low latency wakeup scheduling and packet forwarding is challenging due to dynamic duty cycling, posing time-varying sleep latencies and necessitating the use of dynamic wakeup schedules. We ... Keywords: Dynamic duty cycling, Dynamic wakeup scheduling, Energy-harvesting, Routing, Sleep latency, Wireless sensor network

Alvin C. Valera; Wee-Seng Soh; Hwee-Pink Tan

2013-05-01T23:59:59.000Z

368

Clustering of wireless sensor and actor networks based on sensor distribution and connectivity  

Science Conference Proceedings (OSTI)

Wireless Sensor and Actor Networks (WSANs) employ significantly more capable actor nodes that can collect data from sensors and perform application specific actions. To take these actions collaboratively at any spot in the monitored regions, maximal ... Keywords: Actor placement, Clustering, Connectivity, Energy-efficiency, Messaging overhead, Sensor distribution, Wireless sensor and actor networks

Kemal Akkaya; Fatih Senel; Brian McLaughlan

2009-06-01T23:59:59.000Z

369

Coverage preserved optimal routing protocol for improving the quality of service in wireless sensor networks  

Science Conference Proceedings (OSTI)

In wireless sensor network, there are many hurdles takes place in providing quality of service routing to a desired level. The majority of routing protocols in wireless sensor networks concentrates only on energy efficiency as a prime factor, and only ... Keywords: cluster-head, coverage, energy efficiency, lifetime, multi-path routing, quality of service, self-scheduling

B. Paramasivan; K. Mohaideen Pitchai; D. Usha; S. Radha Krishnan

2009-11-01T23:59:59.000Z

370

Efficient solution techniques for the integrated coverage, sink location and routing problem in wireless sensor networks  

Science Conference Proceedings (OSTI)

Sensors are tiny electronic devices having limited battery energy and capability for sensing, data processing and communicating. They can collectively behave to provide an effective wireless network that monitors a region and transmits the collected ... Keywords: Integer programming, Tabu search, Wireless sensor networks

Evren Güney; Necati Aras; ?. Kuban Alt?nel; Cem Ersoy

2012-07-01T23:59:59.000Z

371

An Energy-Efficient Cooperative Node Selction Scheme in Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

In this paper, we propose a novel cooperative node selection scheme in wireless sensor networks that operate in energy-constrained environment. This scheme can obtain higher energy efficiency than the traditional cooperative transmission, which only ... Keywords: cooperative node selection, energy effiency, wireless sensor networks

Yu Zhang; Yueming Cai; Wendong Yang; Youyun Xu

2009-02-01T23:59:59.000Z

372

SeRLoc: secure range-independent localization for wireless sensor networks  

Science Conference Proceedings (OSTI)

In many applications of wireless sensor networks (WSN), sensors are deployed un-tethered in hostile environments. For location-aware WSN applications, it is essential to ensure that sensors can determine their location, even in the presence of malicious ... Keywords: range-independent, secure localization, wireless sensor networks

Loukas Lazos; Radha Poovendran

2004-10-01T23:59:59.000Z

373

Energy balanced scheme based on variable cell transmission range for wireless sensor networks  

Science Conference Proceedings (OSTI)

Clustering techniques in routing protocols improve the scalability of wireless sensor networks. To solve the "hot spot" problem caused by the cluster heads near the sink, which are burdened with heavy relay traffic via multi-hop transfer and tend to ... Keywords: clustering, energy balance, transmission range, wireless sensor networks

Xiao-heng Deng; Chugui Xu; Yi Liu

2009-09-01T23:59:59.000Z

374

Anomaly detection using self-organizing map and wavelets in wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless Sensor Networks (WSNs) have been developed and extensively applied in agriculture monitoring to monitor and collect various physical attributes within a specific area or environment of interest. Data readings from the sensors may be abnormal ... Keywords: agriculture monitoring, anomaly detection, discrete wavelet transform, self-organizing map, wavelets, wireless sensor networks

Supakit Siripanadorn; Wipawee Hattagam; Neung Teaumroong

2010-10-01T23:59:59.000Z

375

Anomaly detection in wireless sensor networks using self-organizing map and wavelets  

Science Conference Proceedings (OSTI)

Wireless Sensor Networks (WSNs) have been applied in agriculture monitoring to monitor and collect various physical attributes within a specific area. It is important to detect data anomalies to determine a suitable course of action. The underlying aim ... Keywords: agriculture monitoring, anomaly detection, discrete wavelet transform, self-organizing map, wavelets, wireless sensor networks

Supakit Siripanadorn; Wipawee Hattagam; Neung Teaumroong

2010-10-01T23:59:59.000Z

376

Low-power TinyOS tuned processor platform for wireless sensor network motes  

Science Conference Proceedings (OSTI)

In this article we describe a low-power processor platform for use in Wireless Sensor Network (WSN) nodes (motes). WSN motes are small, battery-powered devices comprised of a processor, sensors, and a radio frequency transceiver. It is expected that ... Keywords: Embedded system design, Wireless Sensor Network, hardware-software codesign, low power processor

R. K. Raval; C. H. Fernandez; C. J. Bleakley

2010-05-01T23:59:59.000Z

377

Topology control for delay-constraint data collection in wireless sensor networks  

Science Conference Proceedings (OSTI)

Data collection is one of the most important operations in wireless sensor networks. Many practical applications require the real-time data transmission, such as monitoring, tracking, etc. In this paper, we import and define the topology control problem ... Keywords: Data collection, Delay, Energy efficient, Topology control, Wireless sensor networks

Hongli Xu; Liusheng Huang; Wang Liu; Gang Wang; Yang Wang

2009-11-01T23:59:59.000Z

378

A Scalable and Reliable Multicast Routing Protocol for Ad-hoc Wireless Networks  

Science Conference Proceedings (OSTI)

Multicasting is an essential service for ad-hoc wireless networks. In a multicasting environment with multiple senders, receivers or meeting members, traditional multicast routing protocols must pay great overhead for multiple multicast sessions. This ... Keywords: ad-hoc wireless networks, clustering, multicasting, routing, virtual backbone

C. R. Dow; J. H. Lin; K. T. Chen; S. C. Chen; S. F. Hwang

2005-09-01T23:59:59.000Z

379

Composite quality of service and decision making perspectives in wireless networks  

Science Conference Proceedings (OSTI)

Supporting quality of service (QoS) in wireless networks has been a very rich and interesting area of research. Many significant advances have been made in supporting QoS in single wireless networks. However, the support for the QoS across multiple heterogeneous ... Keywords: Composite quality of service, Decisions, Quality of service

Punit Ahluwalia; Upkar Varshney

2009-01-01T23:59:59.000Z

380

Spatial correlation and mobility-aware traffic modeling for wireless sensor networks  

Science Conference Proceedings (OSTI)

Recently, there has been a great deal of research on using mobility in wireless sensor networks (WSNs) to facilitate surveillance and reconnaissance in a wide deployment area. Besides providing an extended sensing coverage, node mobility along with spatial ... Keywords: long-range dependence, mobility, resource provision, spatial correlation, wireless sensor network (WSN)

Pu Wang; Ian F. Akyildiz

2011-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

DLS: A dynamic local stitching mechanism to rectify transmitting path fragments in wireless sensor networks  

Science Conference Proceedings (OSTI)

In this paper, a pair of novel rectification algorithms (greedy negative pressure push algorithm and dynamic local stitching algorithm) is proposed to cooperatively repair broken transmitting paths in Wireless Sensor Networks. Our approach is to overcome ... Keywords: Data transmitting integrality, Dynamic local stitching algorithm, Fault tolerance, Wireless sensor networks

Ting Yang; Yugeng Sun; Javid Taheri; Albert Y. Zomaya

2013-01-01T23:59:59.000Z

382

TinyNode: a comprehensive platform for wireless sensor network applications  

Science Conference Proceedings (OSTI)

We introduce the TinyNode platform for wireless sensor networks. Supporting both research and industrial deployments, the platform offers communication ranges that exceed current platforms by a factor of 3 to 5, while consuming similar energy. It comes ... Keywords: embedded systems, wireless sensor networks

Henri Dubois-Ferrière; Laurent Fabre; Roger Meier; Pierre Metrailler

2006-04-01T23:59:59.000Z

383

A survey of vertical handover decision algorithms in Fourth Generation heterogeneous wireless networks  

Science Conference Proceedings (OSTI)

Vertical handover decision (VHD) algorithms are essential components of the architecture of the forthcoming Fourth Generation (4G) heterogeneous wireless networks. These algorithms need to be designed to provide the required Quality of Service (QoS) ... Keywords: 4G, Fourth Generation, Vertical handover, Wireless networks

Xiaohuan Yan; Y. Ahmet ?ekercio?lu; Sathya Narayanan

2010-08-01T23:59:59.000Z

384

Hands-on approach to teaching wireless sensor networks at the undergraduate level  

Science Conference Proceedings (OSTI)

Teaching wireless sensor networks (WSNs) at the undergraduate level is both challenging and rewarding. WSNs include low-level programming and debugging, power-aware operations, novel communication paradigms and interdisciplinary applications in real ... Keywords: MSB430, deployment, hands-on experience, teaching, undergraduate, wireless sensor networks

Anna Förster; Mehdi Jazayeri

2010-06-01T23:59:59.000Z

385

Opportunistic routing in wireless sensor networks powered by ambient energy harvesting  

Science Conference Proceedings (OSTI)

Energy consumption is an important issue in the design of wireless sensor networks (WSNs) which typically rely on portable energy sources like batteries for power. Recent advances in ambient energy harvesting technologies have made it possible for sensor ... Keywords: Energy harvesting, Opportunistic routing, Wireless sensor networks

Zhi Ang Eu; Hwee-Pink Tan; Winston K. G. Seah

2010-12-01T23:59:59.000Z

386

SENHOD: scarce-resources wireless sensor network for healthcare in oil derricks  

Science Conference Proceedings (OSTI)

We present our experience with designing, developing, and deploying of a Scarce-resource Wireless Sensor Network (SWSN) for monitoring temperature and humidity high above oil derricks (drilling tower) in PEMEX (Parastatal Mexican Petroleum Company) drilling ... Keywords: derrickmen, exposure, healthcare, humidity, oil derrick, sensor, temperature, wireless sensor network

Pablo Pancardo; Juan C. Dueñas

2008-01-01T23:59:59.000Z

387

Low-power/low-voltage RF microsystems for wireless sensors networks  

Science Conference Proceedings (OSTI)

This paper presents radio-frequency (RF) microsystems (MSTs) composed by low-power devices for use in wireless sensors networks (WSNs). The RF CMOS transceiver is the main electronic system and its power consumption is a critical issue. Two RF CMOS transceivers ... Keywords: RF CMOS transceiver, RF microsystems, Wireless sensors networks

J. P. Carmo; J. H. Correia

2009-12-01T23:59:59.000Z

388

Mathematical Modeling for Evaluation of Quality of Service Parameters in Next Generation Cellular Wireless Networks  

Science Conference Proceedings (OSTI)

In this paper, a mathematical model has been developed for cellular wireless network with Gamma inter-arrivals and general call holding times. Measurement based studies have shown that Poisson assumption averages out the traffic characteristics to a ... Keywords: Cellular wireless networks, QoS, mathematical model

Raj Kumar Samanta; Partha Bhattacharjee; Gautam Sanyal

2009-12-01T23:59:59.000Z

389

Security computing for the resiliency of protecting from internal attacks in distributed wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor network (WSNs) have been making up of a mass of spatially distributed autonomous sensors to monitor physical or environmental conditions. However, security threats to WSNs become increasingly diversified, prevention based due to their ... Keywords: distributed wireless sensor networks, internal attacks, resiliency, security computing, sensor optimum deployment

Xu Huang; Dharmendra Sharma; Muhammad Ahmed

2012-09-01T23:59:59.000Z

390

Sink placement on a 3D terrain for border surveillance in wireless sensor networks  

Science Conference Proceedings (OSTI)

With their distributed nature and redundant operation capability, wireless sensor networks are very suitable for border surveillance scenarios that track intruders trying to breach to a safe side. In such scenarios, keeping the operation going on for ... Keywords: Border surveillance, Discrete event simulation, Genetic algorithms, Sink placement, Three dimensional terrain, Wireless sensor networks

Rabun Kosar; Cem Ersoy

2012-02-01T23:59:59.000Z

391

Towards Verifying Correctness of Wireless Sensor Network Applications Using Insense and Spin  

Science Conference Proceedings (OSTI)

The design and implementation of wireless sensor network applications often require domain experts, who may lack expertise in software engineering, to produce resource-constrained, concurrent, real-time software without the support of high-level software ... Keywords: Concurrency, Distributed systems, Formal Modelling, Wireless Sensor Networks

Oliver Sharma; Jonathan Lewis; Alice Miller; Al Dearle; Dharini Balasubramaniam; Ron Morrison; Joe Sventek

2009-06-01T23:59:59.000Z

392

Fusion-based volcanic earthquake detection and timing in wireless sensor networks  

Science Conference Proceedings (OSTI)

Volcano monitoring is of great interest to public safety and scientific explorations. However, traditional volcanic instrumentation such as broadband seismometers are expensive, power hungry, bulky, and difficult to install. Wireless sensor networks ... Keywords: Volcano monitoring, data fusion, earthquake detection, wireless sensor network

Rui Tan; Guoliang Xing; Jinzhu Chen; Wen-Zhan Song; Renjie Huang

2013-03-01T23:59:59.000Z

393

Heterogeneous wireless sensor network deployment and topology control based on irregular sensor model  

Science Conference Proceedings (OSTI)

Heterogeneous wireless sensor network (heterogeneous WSN) consists of sensor nodes with different ability, such as different computing power and sensing range. Compared with homogeneous WSN, deployment and topology control are more complex in heterogeneous ... Keywords: heterogeneous sensor deployment, irregular sensor model, sensor coverage, topology control, wireless sensor network

Chun-Hsien Wu; Yeh-Ching Chung

2007-05-01T23:59:59.000Z

394

Electronic shepherd - a low-cost, low-bandwidth, wireless network system  

Science Conference Proceedings (OSTI)

This paper reports a new novel low-cost, wireless communication network system, called the "Electronic Shepherd" (ES). The system is innovative in the way that it supports flock behavior, meaning that a flock leader monitors the state of the other elements ... Keywords: GPRS, GPS, animal tracking, cost-effective communication, low-power equipment, rural computing, short-range communication, wireless network

Bjørn Thorstensen; Tore Syversen; Trond-Are Bjørnvold; Tron Walseth

2004-06-01T23:59:59.000Z

395

Proportionally fair allocation of end-to-end bandwidth in STDMA wireless networks  

Science Conference Proceedings (OSTI)

We consider the problem of designing distributed mechanisms for joint congestion control and resource allocation in spatial-reuse TDMA wireless networks. The design problem is posed as a utility maximization subject to link rate constraints that involve ... Keywords: ad hoc wireless networks, congestion control, convex optimization, cross-layer design, mathematical decomposition

Pablo Soldati; Björn Johansson; Mikael Johansson

2006-05-01T23:59:59.000Z

396

Performance evaluation of scheduling in IEEE 802.16 based wireless mesh networks  

Science Conference Proceedings (OSTI)

IEEE 802.16 employs TDMA (Time Division Multiple Access) as the access method and the policy for selecting scheduled links in a given time slot will definitely impact the system performance. We propose a collision-free centralized scheduling algorithm ... Keywords: IEEE 802.16, Link scheduling, Relay model, Wireless access networks, Wireless mesh networks

Bo Han; Weijia Jia; Lidong Lin

2007-02-01T23:59:59.000Z

397

A Novel Trust-Aware Geographical Routing Scheme for Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks are vulnerable to a wide set of security attacks, including those targeting the routing protocol functionality. The applicability of legacy security solutions is disputable (if not infeasible), due to severe restrictions in node ... Keywords: Routing attacks, Secure routing, Security, Trust model, Wireless sensor networks

Theodore Zahariadis; Panagiotis Trakadas; Helen C. Leligou; Sotiris Maniatis; Panagiotis Karkazis

2013-03-01T23:59:59.000Z

398

Joint Routing and Scheduling in Multi-hop Wireless Networks with Directional Antennas  

E-Print Network (OSTI)

Long-distance multi-hop wireless networks have been used in recent years to provide connectivity to rural areas. The salient features of such networks include TDMA channel access, nodes with multiple radios, and point-to-point ...

Dutta, Partha

399

A Wireless Network for Collection and Synthesis of Mobile Mesoscale Weather Observations  

Science Conference Proceedings (OSTI)

This paper reports the development of a wireless network of instrumented vehicles and aircraft for the real-time collection and synthesis of their mobile weather observations in mesoscale field experiments. The mobile digital network (MDN) ...

Conrad L. Ziegler; Douglas Kennedy; Erik N. Rasmussen

2004-11-01T23:59:59.000Z

400

A green wireless sensor network for environmental monitoring and risk identification  

Science Conference Proceedings (OSTI)

A sensor-based community network for environmental data gathering and predictive analysis has been developed. A mesh network of wireless sensors reports data to a central site for environmental monitoring and risk identification. Data analysis and ...

Patricia Morreale; Feng Qi; Paul Croft

2011-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

The placement-configuration problem for intrusion detection nodes in wireless sensor networks  

Science Conference Proceedings (OSTI)

The deployment and configuration of a distributed network intrusion detection system (NIDS) in a large Wireless Sensor Network (WSN) is an enormous challenge. A reduced number of devices equipped with detection capabilities have to be placed on strategic ...

Juan E. Tapiador, John A. Clark

2013-10-01T23:59:59.000Z

402

Rate-adaption channel assignment and routing algorithm for multi-channel wirelessMAN mesh networks  

Science Conference Proceedings (OSTI)

Wireless mesh networks provide an easy deployed and extensible solution to access Internet or communicate with each other for both enterprises and individuals. With the help of multi-channel and multi-radio, wireless mesh network can support more traffic ... Keywords: IEEE 802.16, channel assignment, rate-adaption, routing, wireless mesh network

Eric Hsiao-Kuang Wu; Wei-Li Chang; Hsuan-Hao Chan

2007-07-01T23:59:59.000Z

403

Development of a photovoltaic power supply for wireless sensor networks.  

DOE Green Energy (OSTI)

This report examines the design process of a photovoltaic (solar) based power supply for wireless sensor networks. Such a system stores the energy produced by an array of photovoltaic cells in a secondary (rechargeable) battery that in turn provides power to the individual node of the sensor network. The goal of such a power supply is to enable a wireless sensor network to have an autonomous operation on the order of years. Ideally, such a system is as small as possible physically while transferring the maximum amount of available solar energy to the load (the node). Within this report, there is first an overview of current solar and battery technologies, including characteristics of different technologies and their impact on overall system design. Second is a general discussion of modeling, predicting, and analyzing the extended operation of a small photovoltaic power supply and setting design parameters. This is followed by results and conclusions from the testing of a few basic systems. Lastly, some advanced concepts that may be considered in order to optimize future systems will be discussed.

Harvey, Matthew R.; Kyker, Ronald D.

2005-06-01T23:59:59.000Z

404

Flexible application driven network striping over Wireless Wide Area Networks  

E-Print Network (OSTI)

Inverse multiplexing, or network striping, allows the construction of a high-bandwidth virtual channel from a collection of multiple low-bandwidth network channels. Striping systems usually employ a packet scheduling policy ...

Qureshi, Asfandyar

2005-01-01T23:59:59.000Z

405

Survey of mobile object tracking protocols in wireless sensor networks: a network-centric perspective  

Science Conference Proceedings (OSTI)

Mobile object tracking in Wireless Sensor Networks (WSNs) has gained much attention during recent years owing to its growing application potential for the ubiquitous society. In this paper, we present an investigation and taxonomy of the state-of-the-art ...

Marjan Naderan; Mehdi Dehghan; Hossein Pedram; Vesal Hakami

2012-09-01T23:59:59.000Z

406

Robust Clock Synchronization Methods for Wireless Sensor Networks  

E-Print Network (OSTI)

Wireless sensor networks (WSNs) have received huge attention during the recent years due to their applications in a large number of areas such as environmental monitoring, health and traffic monitoring, surveillance and tracking, and monitoring and control of factories and home appliances. Also, the rapid developments in the micro electro-mechanical systems (MEMS) technology and circuit design lead to a faster spread and adoption of WSNs. Wireless sensor networks consist of a number of nodes featured in general with energy-limited sensors capable of collecting, processing and transmitting information across short distances. Clock synchronization plays an important role in designing, implementing, and operating wireless sensor networks, and it is essential in ensuring a meaningful information processing order for the data collected by the nodes. Because the timing message exchanges between different nodes are affected by unknown possibly time-varying network delay distributions, the estimation of clock offset parameters represents a challenge. This dissertation presents several robust estimation approaches of the clock offset parameters necessary for time synchronization of WSNs via the two-way message exchange mechanism. In this dissertation the main emphasis will be put on building clock phase offset estimators robust with respect to the unknown network delay distributions. Under the assumption that the delay characteristics of the uplink and the downlink are asymmetric, the clock offset estimation method using the bootstrap bias correction approach is derived. Also, the clock offset estimator using the robust Mestimation technique is presented assuming that one underlying delay distribution is mixed with another delay distribution. Next, although computationally complex, several novel, efficient, and robust estimators of clock offset based on the particle filtering technique are proposed to cope with the Gaussian or non-Gaussian delay characteristics of the underlying networks. One is the Gaussian mixture Kalman particle filter (GMKPF) method. Another is the composite particle filter (CPF) approach viewed as a composition between the Gaussian sum particle filter and the KF. Additionally, the CPF using bootstrap sampling is also presented. Finally, the iterative Gaussian mixture Kalman particle filter (IGMKPF) scheme, combining the GMKPF with a procedure for noise density estimation via an iterative mechanism, is proposed.

Lee, Jae Han

2010-08-01T23:59:59.000Z

407

Wireless Sensor Network for Improving the Energy Efficiency of...  

NLE Websites -- All DOE Office Websites (Extended Search)

032012 Publisher Lawrence Berkeley National Laboratory City Berkeley Keywords data center, energy efficiency, energy efficiency of data, Wireless sensor, Wireless sensor...

408

Underground coal mine monitoring with wireless sensor networks - article no. 10  

Science Conference Proceedings (OSTI)

Environment monitoring in coal mines is an important application of wireless sensor networks (WSNs) that has commercial potential. We discuss the design of a Structure-Aware Self-Adaptive WSN system, SASA. By regulating the mesh sensor network deployment and formulating a collaborative mechanism based on a regular beacon strategy, SASA is able to rapidly detect structure variations caused by underground collapses. We further develop a sound and robust mechanism for efficiently handling queries under instable circumstances. A prototype is deployed in a real coal mine. We present our implementation experiences as well as the experimental results. To better evaluate the scalability and reliability of SASA, we also conduct a large-scale trace-driven simulation based on real data collected from the experiments.

Li, M.; Liu, Y.H. [Hong Kong University of Science & Technology, Hong Kong (China)

2009-03-15T23:59:59.000Z

409

Security Schemes for Wireless Sensor Networks with Mobile Sink  

E-Print Network (OSTI)

Mobile sinks are vital in many wireless sensor applications for efficient data collection, data querying, and localized sensor reprogramming. Mobile sinks prolong the lifetime of a sensor network. However, when sensor networks with mobile sinks are deployed in a hostile environment, security became a critical issue. They become exposed to varieties of malicious attacks. Thus, anti threats schemes and security services, such as mobile sink?s authentication and pairwise key establishment, are essential components for the secure operation of such networks. Due to the sensors, limited resources designing efficient security schemes with low communication overhead to secure communication links between sensors and MS (Mobile Sink) is not a trivial task. In addition to the sensors limited resources, sink mobility required frequent exchange of cryptography information between the sensors and MS each time the MS updates its location which imposes extra communication overhead on the sensors. In this dissertation, we consider a number of security schemes for WSN (wireless sensor network) with MS. The schemes offer high network?s resiliency and low communication overhead against nodes capture, MS replication and wormhole attacks. We propose two schemes based on the polynomial pool scheme for tolerating nodes capture: the probabilistic generation key pre-distribution scheme combined with polynomial pool scheme, and the Q-composite generation key scheme combined with polynomial pool scheme. The schemes ensure low communication overhead and high resiliency. For anti MS replication attack scheme, we propose the multiple polynomial pools scheme that provide much higher resiliency to MS replication attack as compared to the single polynomial pool approach. Furthermore, to improve the network resiliency against wormhole attack, two defensive mechanisms were developed according to the MS mobility type. In the first technique, MS uses controlled mobility. We investigate the problem of using a single authentication code by sensors network to verify the source of MS beacons, and then we develop a defensive approach that divide the sensor network into different authentication code?s grids. In the second technique, random mobility is used by MS. We explore the use of different communication channels available in the sensor hardware combined with polynomial pool scheme.

Rasheed, Amar Adnan

2010-05-01T23:59:59.000Z

410

Multicasting in Large Wireless Networks: Bounds on the Minimum Energy per Bit  

E-Print Network (OSTI)

We consider scaling laws for maximal energy efficiency of communicating a message to all the nodes in a wireless network, as the number of nodes in the network becomes large. Two cases of large wireless networks are studied -- dense random networks and constant density (extended) random networks. In addition, we also study finite size regular networks in order to understand how regularity in node placement affects energy consumption. We first establish an information-theoretic lower bound on the minimum energy per bit for multicasting in arbitrary wireless networks when the channel state information is not available at the transmitters. Upper bounds are obtained by constructing a simple flooding scheme that requires no information at the receivers about the channel states or the locations and identities of the nodes. The gap between the upper and lower bounds is only a constant factor for dense random networks and regular networks, and differs by a poly-logarithmic factor for extended random networks. Further...

Jain, Aman; Verdu, Sergio

2009-01-01T23:59:59.000Z

411

Prioritized Multi-class Adaptive Framework for Multimedia Wireless Networks  

E-Print Network (OSTI)

Abstract—The next generation of Wireless Cellular Networks (WCNs) is expected to support real-time multimedia applications with different classes of traffic and diverse bandwidth requirements. Bandwidth is a scarce resource in wireless networking that needs to be carefully allocated amidst competing connections with different Quality of Service (QoS) requirements. In this paper, we propose an adaptive framework for supporting multiple classes of multimedia services with different QoS requirements in WCNs. The framework combines the following components: (i) a threshold-based bandwidth allocation policy that gives priority to handoff calls over new calls and prioritizes between different classes of handoff calls by assigning a threshold to each class, (ii) an efficient threshold-type Call Admission Control (CAC) algorithm, and (iii) a Bandwidth Adaptation Algorithm (BAA) that dynamically adjusts the bandwidth of an ongoing multimedia call to minimize the number of calls receiving lower bandwidth than the requested. Numerical results show that the performance of our adaptive multimedia framework outperforms that of existing nonadaptive schemes in terms of the handoff call dropping probability and effective utilization. I.

Nidal Nasser; Hossam Hassanein

2004-01-01T23:59:59.000Z

412

Secure Position Verification for Wireless Sensor Networks in Noisy Channels  

E-Print Network (OSTI)

Position verification in wireless sensor networks (WSNs) is quite tricky in presence of attackers (malicious sensor nodes), who try to break the verification protocol by reporting their incorrect positions (locations) during the verification stage. In the literature of WSNs, most of the existing methods of position verification have used trusted verifiers, which are in fact vulnerable to attacks by malicious nodes. They also depend on some distance estimation techniques, which are not accurate in noisy channels (mediums). In this article, we propose a secure position verification scheme for WSNs in noisy channels without relying on any trusted entities. Our verification scheme detects and filters out all malicious nodes from the network with very high probability.

Mandal, Partha Sarathi

2011-01-01T23:59:59.000Z

413

E2XLRADR (Energy Efficient Cross Layer Routing Algorithm with Dynamic Retransmission for Wireless Sensor Networks)  

E-Print Network (OSTI)

The main focus of this article is to achieve prolonged network lifetime with overall energy efficiency in wireless sensor networks through controlled utilization of limited energy. Major percentage of energy in wireless sensor network is consumed during routing from source to destination, retransmission of data on packet loss. For improvement, cross layered algorithm is proposed for routing and retransmission scheme. Simulation and results shows that this approach can save the overall energy consumption

Babulal, Kanojia Sindhuben; 10.5121/ijwmn.2010.2312

2010-01-01T23:59:59.000Z

414

DogoIDS: a mobile and active intrusion detection system for IEEE 802.11s wireless mesh networks  

Science Conference Proceedings (OSTI)

Wireless Mesh Networks (WMN) are particularly vulnerable to attacks, since they feature constraint nodes, multi-hop communication, and an open wireless communication channel. These features limit the feasibility of the deployment of contemporary Intrusion ... Keywords: intrusion detection, security, wireless mesh networks

Rodrigo do Carmo; Matthias Hollick

2013-04-01T23:59:59.000Z

415

Demo: Achieving robust sensor networks through close coordination between narrow-band power line and low-power wireless communications  

Science Conference Proceedings (OSTI)

Sensor networks are increasingly available in home and industry automation applications. The use of battery-powered wireless sensor nodes eases network deployment, but the dynamic wireless medium, along with energy and bandwidth constraints, poses a ... Keywords: PLC, coordination, hybrid, robustness, wireless

Yanjun Sun; Sandeep Bhadra; Soon-Hyeok Choi; Minghua Fu; Xiaolin Lu

2011-11-01T23:59:59.000Z

416

Network-aware Adaptation with Real-Time Channel Statistics for Wireless LAN Multimedia Transmissions in the Digital Home  

E-Print Network (OSTI)

This paper suggests the use of intelligent network-aware processing agents in wireless local area network drivers to generate metrics for bandwidth estimation based on real-time channel statistics to enable wireless multimedia application adaptation. Various configurations in the wireless digital home are studied and the experimental results with performance variations are presented.

Krishnaswamy, Dilip

2009-01-01T23:59:59.000Z

417

Asymptotically optimal trade-off between local and global connectivity in wireless networks  

Science Conference Proceedings (OSTI)

We analyze large, random network topologies that arise in ad hoc or sensor networks. A fundamental requirement of communication in these systems is reachability, that is, to have a connected network topology. It is known, however, that the price for ... Keywords: Connectivity, Random wireless network topology, Scalability

András Faragó

2011-02-01T23:59:59.000Z

418

Monitoring and Determination of Wind Energy Potential by Web Based Wireless Network  

Science Conference Proceedings (OSTI)

In this paper, we develop a web based interface which performs a wireless communication with ZigBee protocol for monitoring wind energy potential and also gathering custom reports for determination of the interested wind field. A custom printed circuit ... Keywords: wind energy, wireless network, web based control

Onur Keskin; ISmet Ates; Ziya Haktan Karadeniz; Alpaslan Turgut; Zeki KiRal

2012-12-01T23:59:59.000Z

419

Using a Wireless Sensors Network in the Sustainable Management of African Palm Oil Solid Waste  

Science Conference Proceedings (OSTI)

All human activities have an impact in the environment in which we live. Nowadays, the industrial gases emission is considered as one of the main causes for worsening greenhouse effect. The African Palm agro industry in Ecuador is no stranger to this ... Keywords: compost, production science, solid waste, wireless sensors network, wireless communication technologies

Mauro Jimenez, Alejandra Jimenez, Pablo Lozada, Santiago Jimenez, Cristhy Jimenez

2013-04-01T23:59:59.000Z

420

A Self-Adaptive Spectrum Management Middleware for Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

The vision of the Internet of Things, wherein everyday objects are embedded with smart wireless sensor devices, is making these sensor devices increasingly pervasive. As the density of their deployment in overlapping or adjacent areas increases, the ... Keywords: Mediaaccess control, Spectrum management, Wireless sensor networks

Robert Thompson; Gang Zhou; Lei Lu; Sudha Krishnamurthy; Hover Dong; Xin Qi; Yantao Li; Matthew Keally; Zhen Ren

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Multihop performance of cooperative preamble sampling MAC(CPS-MAC) in wireless sensor networks  

Science Conference Proceedings (OSTI)

Cooperative communication(CC) is a promising technique to combat fading in a wireless environment. In our previous work, we proposed Cooperative Preamble Sampling(CPS)-Medium Access Control(MAC) protocol which highlighted the benefits of using CC in ... Keywords: cooperative communication, medium access control, preamble sampling, reliability, wireless sensor networks

Rana Azeem M. Khan; Holger Karl

2011-07-01T23:59:59.000Z

422

My Home is My Bazaar - A Taxonomy and Classification of Current Wireless Home Network Protocols  

Science Conference Proceedings (OSTI)

Recent advances in wireless communication have produced a multitude of related protocols, leading to a growing market of products for home automation systems within energy management, elder care, etc. These systems are different from wired ones in terms ... Keywords: wireless networks, security, home automation, pervasive computing, protocols, taxonomy

Rune Torbensen; Klaus Marius Hansen; Theis Solberg Hjorth

2011-09-01T23:59:59.000Z

423

Market-based resource allocation for distributed data processing in wireless sensor networks  

Science Conference Proceedings (OSTI)

In recent years, improved wireless technologies have enabled the low-cost deployment of large numbers of sensors for a wide range of monitoring applications. Because of the computational resources (processing capability, storage capacity, etc.) collocated ... Keywords: Wireless sensor networks, distributed algorithms, optimization, pricing

Andrew T. Zimmerman; Jerome P. Lynch; Frank T. Ferrese

2013-03-01T23:59:59.000Z

424

Joint spectrum allocation and scheduling for fair spectrum sharing in cognitive radio wireless networks  

Science Conference Proceedings (OSTI)

Cognitive radio and Dynamic Spectrum Access (DSA) enable wireless users to share a wide range of available spectrums. In this paper, we study joint spectrum allocation and scheduling problems in cognitive radio wireless networks with the objectives of ... Keywords: Cognitive radio, Dynamic spectrum access, Fairness, Scheduling, Spectrum allocation

Jian Tang; Satyajayant Misra; Guoliang Xue

2008-08-01T23:59:59.000Z

425

A study on distributed/centralized scheduling for wireless mesh network  

Science Conference Proceedings (OSTI)

The IEEE 802.16 standard proposes the Media Access Control (MAC) protocol for the Wireless Metropolitan Area Network (WMAN). Two transmission modes are defined in the IEEE 802.16, including Point-to-Multipoint (PMP) mode and mesh ... Keywords: 802.16, mesh, performance, scheduling, wireless

Shin-Ming Cheng; Phone Lin; Di-Wei Huang; Shun-Ren Yang

2006-07-01T23:59:59.000Z

426

An efficient scheme for data aggregation with star-graph hierarchical clustering structure in wireless sensor networks  

Science Conference Proceedings (OSTI)

Collecting state-based data from a network of sensors in large-scale deployment wireless sensor networks environment and aggregating those data through prominent sensors necessitate efficient organization of the network topology for the purpose of balancing ... Keywords: aggregation, pre-deployment, wireless sensor networks

Tung-Shih Su; Wen-Shyong Hsieh

2007-08-01T23:59:59.000Z

427

A Multiple Access Protocol for Multimedia Transmission over Wireless Networks  

E-Print Network (OSTI)

This paper develops and evaluates the performance of an advanced multiple access protocol for transmission of full complement of multimedia signals consisting of various combinations of voice, video, data, text and images over wireless networks. The protocol is called Advanced Multiple Access Protocol for Multimedia Transmission (AMAPMT) and is to be used in the Data Link Layer of the protocol stack. The principle of operation of the protocol is presented in a number of logical flow charts. The protocol grants permission to transmit to a source on the basis of a priority scheme that takes into account a time-to-live (TTL) parameter of all the transactions, selectable priorities assigned to all the sources and relevant channel state information (CSI) in this order. Performance of the protocol is evaluated in terms of quality of service parameters like packet loss ratio (PLR), mean packet transfer delay (MPTD) and throughput. Using a simulation model based on an OPNET simulation software package does the evalua...

Yu, Hong

2012-01-01T23:59:59.000Z

428

Wireless Roadside Inspection Phase II Tennessee Commercial Mobile Radio Services Pilot Test Final Report  

SciTech Connect

The Federal Motor Carrier Safety Administration (FMCSA) Wireless Roadside Inspection (WRI) Program is researching the feasibility and value of electronically assessing truck and bus driver and vehicle safety at least 25 times more often than is possible using only roadside physical inspections. The WRI program is evaluating the potential benefits to both the motor carrier industry and to government. These potential benefits include reduction in accidents, fatalities and injuries on our highways and keeping safe and legal drivers and vehicles moving on the highways. WRI Pilot tests were conducted to prototype, test and demonstrate the feasibility and benefits of electronically collecting safety data message sets from in-service commercial vehicles and performing wireless roadside inspections using three different communication methods. This report summarizes the design, conduct and results of the Tennessee CMRS WRI Pilot Test. The purpose of this Pilot test was to demonstrate the implementation of commercial mobile radio services to electronically request and collect safety data message sets from a limited number of commercial vehicles operating in Tennessee. The results of this test have been used in conjunction with the results of the complimentary pilot tests to support an overall assessment of the feasibility and benefits of WRI in enhancing motor carrier safety (reduction in accidents) due to increased compliance (change in motor carrier and driver behavior) caused by conducting frequent safety inspections electronically, at highway speeds, without delay or need to divert into a weigh station

Franzese, Oscar [ORNL; Lascurain, Mary Beth [ORNL; Capps, Gary J [ORNL; Siekmann, Adam [ORNL

2011-05-01T23:59:59.000Z

429

An FDD Wideband CDMA MAC Protocol for Wireless Multimedia Networks  

E-Print Network (OSTI)

A medium access control (MAC) protocol is developed for wireless multimedia networks based on frequency division duplex (FDD) wideband code division multiple access (CDMA). In this protocol, the received power levels of simultaneously transmitting users are controlled by a minimum-power allocation algorithm such that the heterogeneous bit error rates (BERs) of multimedia traffic are guaranteed. With minimumpower allocation, a multimedia wideband CDMA generalized processor sharing (GPS) scheduling scheme is proposed. It provides fair queueing to multimedia traffic with different QoS constraints. It also takes into account the limited number of code channels for each user and the variable system capacity due to interference experienced by users in a CDMA network. The admission of real-time connections is determined by a new effective bandwidth connection admission control (CAC) algorithm in which the minimum-power allocation is also considered. Simulation results show that the new MAC protocol guarantees QoS requirements of both real-time and non-real-time traffic in an FDD wideband CDMA network.

Xudong Wang

2003-01-01T23:59:59.000Z

430

Bio-inspired energy-aware protocol design for cooperative wireless networks  

Science Conference Proceedings (OSTI)

In this work, bio-inspired cooperation rules are applied to wireless communication networks. The main goal is to derive cooperative behaviour rules to improve the energy consumption of each mobile device. A medium access control (MAC) protocol ...

Gian Paolo Perrucci; Puri Ardhy Anggraeni; Satya Ardhy Wardana; Frank H. P. Fitzek; Marcos D. Katz

2011-04-01T23:59:59.000Z

431

GCP: gossip-based code propagation for large-scale mobile wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSN) have recently received an increasing interest. They are now expected to be deployed for long periods of time, thus requiring software updates. Updating the software code automatically on a huge number of sensors is a challenging ...

Yann Busnel; Marin Bertier; Eric Fleury; Anne-Marie Kermarrec

2007-10-01T23:59:59.000Z

432

Reducing signaling traffic in wireless ATM networks through handoff scheme improvement  

Science Conference Proceedings (OSTI)

We propose a new handoff call management scheme which reduces signaling traffic in wireless ATM networks and improves the efficiency of the virtual channel. Chaining followed by a make-break algorithm is a suitable handoff scheme for various situations. ...

Anna Ha?; Yongcan Zhang

2002-08-01T23:59:59.000Z

433

On the probability of finding non-interfering paths in wireless multihop networks  

Science Conference Proceedings (OSTI)

Multipath routing can improve system performance of capacity-limited wireless networks through load balancing. However, even with a single source and destination, intra-flow and inter-flow interference can void any performance improvement. In this paper, ...

S. Waharte; R. Boutaba

2008-05-01T23:59:59.000Z

434

Wireless sensor network planning with application to UWB localization in GPS-denied environments  

E-Print Network (OSTI)

Wireless Sensor Networks (WSN) have received much attention in the past 5 years, and much progress has been made in designing hardware, communications protocols, routing, and sensor fusion algorithms. The planning and ...

Jourdan, Damien, 1978-

2006-01-01T23:59:59.000Z

435

Trimming the tree: tailoring adaptive huffman coding to wireless sensor networks  

Science Conference Proceedings (OSTI)

Nodes in wireless sensor networks are generally designed to operate on a limited energy budget, and must consciously use the available charge to allow for long lifetimes. As the radio transceiver is the predominant power consumer on current node platforms, ...

Andreas Reinhardt; Delphine Christin; Matthias Hollick; Johannes Schmitt; Parag S. Mogre; Ralf Steinmetz

2010-02-01T23:59:59.000Z

436

S4: small state and small stretch routing protocol for large wireless sensor networks  

Science Conference Proceedings (OSTI)

Routing protocols for wireless sensor networks must address the challenges of reliable packet delivery at increasingly large scale and highly constrained node resources. Attempts to limit node state can result in undesirable worst-case routing performance, ...

Yun Mao; Feng Wang; Lili Qiu; Simon S. Lam; Jonathan M. Smith

2007-04-01T23:59:59.000Z

437

Development of software architecture for environmental monitoring using wireless sensor networks  

E-Print Network (OSTI)

In this thesis, I describe the development of the software architecture for temperature monitoring using Wireless Sensor Networks (WSN). The goal of the software is to provide a means to remotely monitor and analyze ...

Hari, Piyush

2006-01-01T23:59:59.000Z

438

Dynamic power allocation and routing for satellite and wireless networks with time varying channels  

E-Print Network (OSTI)

Satellite and wireless networks operate over time varying channels that depend on attenuation conditions, power allocation decisions, and inter-channel interference. In order to reliably integrate these systems into a high ...

Neely, Michael J. (Michael James), 1975-

2004-01-01T23:59:59.000Z

439

Energy-efficient reservation-based medium access control protocol for wireless sensor networks  

Science Conference Proceedings (OSTI)

In Wireless Sensor Networks (WSNs), a robust and energy-efficient Medium Access Control (MAC) protocol is required for high energy efficiency in harsh operating conditions, where node and link failures are common. This paper presents the design of a ...

Mikko Kohvakka; Jukka Suhonen; Timo D. Hämäläinen; Marko Hännikäinen

2010-04-01T23:59:59.000Z

440

Acknowledgment Strategies for Efficient Asymmetric Routing in Energy Harvesting Wireless Sensor Networks.  

E-Print Network (OSTI)

??Energy conservation has been a primary concern in wireless sensor networks (WSNs), where long-term operations are often required in hard-reach environments. Due to unavoidable batteries… (more)

Gade, Tejaswi

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

The development of a wireless sensor network sensing node utilising adaptive self-diagnostics  

Science Conference Proceedings (OSTI)

In Wireless Sensor Network (WSN) applications, sensor nodes are often deployed in harsh environments. Routine maintenance, fault detection and correction is difficult, infrequent and expensive. Furthermore, for long-term deployments in excess of a year, ...

Hai Li; Mark C. Price; Jonathan Stott; Ian W. Marshall

2007-09-01T23:59:59.000Z

442

Energy-aware sparse approximation technique (EAST) for rechargeable wireless sensor networks  

Science Conference Proceedings (OSTI)

Due to non-homogeneous spread of sunlight, sensing nodes typically have non-uniform energy profiles in rechargeable Wireless Sensor Networks (WSNs). An energy-aware work load distribution is therefore necessary for good data accuracy while ensuring an ...

Rajib Rana; Wen Hu; Chun Tung Chou

2010-02-01T23:59:59.000Z

443

Secure and energy-efficient data aggregation for wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks are now in widespread use to monitor regions, detect events and acquire information. Since the deployed nodes are separated, they need to cooperatively communicate sensed data to the base station. To maximise WSN lifetime, it ...

Sofiene Ben Othman; Abdelbasset Trad; Hani Alzaid; Habib Youssef

2013-10-01T23:59:59.000Z

444

Protocols for multi-antenna ad-hoc wireless networking in interference environments  

E-Print Network (OSTI)

A fundamental question for the design of future wireless networks concerns the nature of spectrum management and the protocols that govern use of the spectrum. In the oligopoly model, spectrum is owned and centrally managed, ...

Hinton, Danielle A. (Danielle Ayodele), 1978-

2010-01-01T23:59:59.000Z

445

An energy-efficient communication system for ad hoc wireless and sensor networks  

E-Print Network (OSTI)

Existing ad hoc wireless and sensor network systems often trade off energy against performance. As such, it is hard to find a single deployable system that supports high data rates while maintaining energy-efficient ...

Tetteh, William Nii Adjetey

2007-01-01T23:59:59.000Z

446

Centralized and distributed power allocation in multi-user wireless relay networks  

E-Print Network (OSTI)

Optimal power allocation for multi-user amplify- and-forward wireless relay networks in which multiple source-destination pairs are assisted by a set of relays is investigated. Two relay power allocation strategies based ...

Le, Long Bao

447

The design and implementation of real-time environment monitoring systems based on wireless sensor networks  

Science Conference Proceedings (OSTI)

This research focuses on the implementation of a real-time environment monitoring system for environment detection using wireless sensor networks. The purpose of our research is to construct the system on the real-time environment with the technology ...

Kyung-Hoon Jung; Seok-Cheol Lee; Hyun-Suk Hwang; Chang-Soo Kim

2006-05-01T23:59:59.000Z

448

An Energy Efficient Collaborative Framework for Event Notification in Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks consist of large number of lowpower devices equipped with RF links for communicationthat have several military, civil and environmentalmonitoring applications. The energy constraints due tolimited battery power present numerous ...

Shruti Chugh; Sagar Dharia; Dharma P. Agrawal

2003-10-01T23:59:59.000Z

449

Wireless sensor network node with asynchronous architecture and vibration harvesting micro power generator  

Science Conference Proceedings (OSTI)

This paper presents recent advances in the development of a microsystem designed to be part of a wireless sensor network. This microsystem is developed with two particular technologies: asynchronous circuits and ambient energy harvesting power generator. ...

Yasser Ammar; Aurélien Buhrig; Marcin Marzencki; Benoît Charlot; Skandar Basrour; Karine Matou; Marc Renaudin

2005-10-01T23:59:59.000Z

450

Energy-efficient geographic routing in environmentally powered wireless sensor networks  

Science Conference Proceedings (OSTI)

Current and potential applications of wireless sensor networks (WSNs) include military sensing, physical security, traffic surveillance, and environment monitoring, etc. Due to the fact that WSNs are composed of a large number of low-cost but energy ...

Kai Zeng; Wenjing Lou; Kui Ren; Patrick J. Moran

2006-10-01T23:59:59.000Z

451

Multiplexing, scheduling, and multicasting strategies for antenna arrays in wireless networks  

E-Print Network (OSTI)

A transmitter antenna array has the ability to direct data simultaneously to multiple receivers within a wireless network, creating potential for a more integrated view of algorithmic system components. In this thesis, ...

Lopez, Michael J. (Michael John), 1972-

2002-01-01T23:59:59.000Z

452

ADV-MAC: Advertisement-Based MAC Protocol for Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Several Medium Access Control (MAC) protocols have been proposed for wireless sensor networks with the objective of minimizing energy consumption. For example, Sensor-MAC (S-MAC) was proposed to reduce energy consumption by introducing a duty cycle. ...

Surjya Sarathi Ray; Ilker Demirkol; Wendi Heinzelman

2009-12-01T23:59:59.000Z

453

NetTopo: beyond simulator and visualizer for wireless sensor networks  

Science Conference Proceedings (OSTI)

Simulators are needed for testing algorithms of wireless sensor networks (WSNs) for large scale scenarios. Deploying real WSN testbed provides a more realistic testing environment, and allows users to get more accurate test results. However, deploying ...

Lei Shu; Chun Wu; Yan Zhang; Jiming Chen; Lei Wang; Manfred Hauswirth

2008-10-01T23:59:59.000Z

454

Area temperature system monitoring and computing based on adaptive fuzzy logic in wireless sensor networks  

Science Conference Proceedings (OSTI)

The many subfields in the wireless sensor networking literature include data fusion, data aggregation, remote environmental monitoring, sensing (temperature, pressure speed) and various military applications. The distance between sensor nodes can be ... Keywords: Fuzzy logic, Monitoring, RSSI, Temperature, WSN

Ing-Jiunn Su; Chia-Chih Tsai; Wen-Tsai Sung

2012-05-01T23:59:59.000Z

455

Workflow support for wireless sensor and actor networks: a position paper  

Science Conference Proceedings (OSTI)

As initial challenges of wireless sensor and actor networks (WSANs) are overcome, their application possibilities evolve. For these applications to move mainstream, efficient programming methods are required which can be used by domain experts. So far, ...

Pablo Ezequiel Guerrero; Daniel Jacobi; Alejandro Buchmann

2007-09-01T23:59:59.000Z

456

Proximity breeds danger: emerging threats in metro-area wireless networks  

Science Conference Proceedings (OSTI)

The growing popularity of wireless networks and mobile devices is starting to attract unwanted attention especially as potential targets for malicious activities reach critical mass. In this study, we try to quantify the threat from large-scale distributed ...

P. Akritidis; W. Y. Chin; V. T. Lam; S. Sidiroglou; K. G. Anagnostakis

2007-08-01T23:59:59.000Z

457

A Reputation Model Based on Behavior Trust in Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Trust management has an important significance on the reliable operation and safety guarantee in Wireless Sensor Networks(WSNs). Previous works were implemented by exchanging key among neighboring sensors. Considering that in many cases, the sensor nodes’ ...

Ming-Zheng Zhou; Yi Zhang; Jun Wang; Sen-Yan Zhao

2009-09-01T23:59:59.000Z

458

The design of sustainable wireless sensor network node using solar energy and phase change memory  

Science Conference Proceedings (OSTI)

Sustainability of wireless sensor network (WSN) is crucial to its economy and efficiency. While previous works have focused on solving the energy source limitation through solar energy harvesting, we reveal in this paper that sensor node's lifespan could ...

Ping Zhou, Youtao Zhang, Jun Yang

2013-03-01T23:59:59.000Z

459

Battery-free Wireless Sensor Network For Advanced Fossil-Fuel Based Power Generation  

SciTech Connect

This report summarizes technical progress achieved during the project supported by the Department of Energy under Award Number DE-FG26-07NT4306. The aim of the project was to conduct basic research into battery-free wireless sensing mechanism in order to develop novel wireless sensors and sensor network for physical and chemical parameter monitoring in a harsh environment. Passive wireless sensing platform and five wireless sensors including temperature sensor, pressure sensor, humidity sensor, crack sensor and networked sensors developed and demonstrated in our laboratory setup have achieved the objective for the monitoring of various physical and chemical parameters in a harsh environment through remote power and wireless sensor communication, which is critical to intelligent control of advanced power generation system. This report is organized by the sensors developed as detailed in each progress report.

Yi Jia

2011-02-28T23:59:59.000Z

460

Substation-Wide Monitoring Through Applications of Networked Wireless Sensor Devices  

Science Conference Proceedings (OSTI)

This report presents the work performed by researchers at the University of North Carolina at Charlotte on an EPRI-sponsored project involving the development of a wireless sensor network for substation monitoring. Wireless sensor networking is an emerging technology, and its application to substation monitoring has substantial economic as well as functional benefits. This report describes the challenges faced, technologies used, design strategies developed, and lessons learned from the various experimen...

2007-12-21T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Wireless Networking to Support Data and Voice Communication Using Spread Spectrum Technology in The Physical Layer  

E-Print Network (OSTI)

Wireless networking is rapidly growing and becomes an inexpensive technology which allows multiple users to simultaneously access the network and the internet while roaming about the campus. In the present work, the software development of a wireless LAN(WLAN) is highlighted. This WLAN utilizes direct sequence spread spectrum (DSSS) technology at 902MHz RF carrier frequency in its physical layer. Cost effective installation and antijaming property of spread spectrum technology are the major advantages of this work.

Dhar, Sourav

2007-01-01T23:59:59.000Z

462

Self organization of wireless sensor networks using ultra-wideband radios  

DOE Patents (OSTI)

A novel UWB communications method and system that provides self-organization for wireless sensor networks is introduced. The self-organization is in terms of scalability, power conservation, channel estimation, and node synchronization in wireless sensor networks. The UWB receiver in the present invention adds two new tasks to conventional TR receivers. The two additional units are SNR enhancing unit and timing acquisition and tracking unit.

Dowla, Farid U. (Castro Valley, CA); Nekoogar, Franak (San Ramon, CA); Spiridon, Alex (Palo Alto, CA)

2009-06-16T23:59:59.000Z

463

A new approach for integrated coverage and connectivity in wireless sensor networks  

Science Conference Proceedings (OSTI)

An effective approach for energy conservation in wireless sensor networks is scheduling sleep intervals for extraneous nodes while the remaining nodes stay active to provide continuous service. For the sensor network to operates successfully, the active ... Keywords: Connectivity, Coverage, Deployment, Sensor network

Seyed Hossein Khasteh; Saeed Bagheri Shouraki; Nima Hajiabdorahim; Ehsan Dadashnialehi

2012-12-01T23:59:59.000Z

464

Performance evaluation of low energy adaptive clustering hierarchy protocol for wireless sensor networks  

Science Conference Proceedings (OSTI)

Clustering of sensor nodes is an effective technique for achieving prolonged network lifetime, scalability, and load balancing. This paper focuses on the performance evaluation of the Low Energy Adaptive Clustering Hierarchy (LEACH) protocol that can ... Keywords: clustering, energy consumption, network lifetime, wireless sensor networks

D. A. Vidhate; A. K. Patil; S. S. Pophale

2010-02-01T23:59:59.000Z

465

Energy-efficient forwarding mechanism for wireless opportunistic networks in emergency scenarios  

Science Conference Proceedings (OSTI)

During emergency situations, the use of mobile devices and wireless opportunistic networks as a solution of destroyed or overused communication networks are vital. In these cases, the fast and reliable delivery of emergency information, together with ... Keywords: Emergency scenarios, Energy-efficiency, Opportunistic forwarding, Opportunistic networks, Performance evaluation

Abraham MartíN-Campillo; Ramon Martí

2012-08-01T23:59:59.000Z

466

On improving temporal and spatial mobility metrics for wireless ad hoc networks  

Science Conference Proceedings (OSTI)

This work shows that two well-known spatial and temporal mobility metrics for wireless multi-hop networks have limitations, possibly resulting in misleading results. Based on the concept of spatial dependence among nodes including transient periods of ... Keywords: Mobile ad hoc network, Mobility metric, Mobility model, Network simulation, Spatial dependence, Temporal dependence

Elmano Ramalho Cavalcanti; Marco Aurélio Spohn

2012-04-01T23:59:59.000Z

467

Architecture of Wireless Multimedia Mesh Network Nodes for Longwall Coal Mine Automation  

Science Conference Proceedings (OSTI)

Wireless multimedia mesh network is used for longwall coal mine face to transmit signal of data, voice and video in real time with the development of modern coal mine. The performance of the backhaul network especially it’s throughput is the essential ... Keywords: architecturet, mesh network nodes, longwall coal mine, 3-radio

Xiaolong Feng; Jiansheng Qian

2010-06-01T23:59:59.000Z

468

QoS and energy aware routing for real-time traffic in wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks are being built to facilitate automated information gathering in military, industrial, environmental and surveillance applications. Many such applications of Sensor Networks require improved QoS (packet delivery within a defined ... Keywords: QoS routing, Real-Time communication, Sensor networks

Abinash Mahapatra; Kumar Anand; Dharma P. Agrawal

2006-02-01T23:59:59.000Z

469

Optimizing lifetime for continuous data aggregation with precision guarantees in wireless sensor networks  

Science Conference Proceedings (OSTI)

This paper exploits the tradeoff between data quality and energy consumption to extend the lifetime of wireless sensor networks. To obtain an aggregate form of sensor data with precision guarantees, the precision constraint is partitioned and allocated ... Keywords: data accuracy, data aggregation, energy efficiency, network lifetime, sensor network

Xueyan Tang; Jianliang Xu

2008-08-01T23:59:59.000Z

470

A novel terminal-controlled handover scheme in heterogeneous wireless networks  

Science Conference Proceedings (OSTI)

In the next generation heterogeneous wireless networks, a mobile terminal (MT) with a multi-interface may have network access from different service providers using various technologies. In spite of this heterogeneity, seamless intersystem mobility is ... Keywords: Fuzzy logic, Handover, Heterogeneous networks

Xu Haibo; Tian Hui; Zhang Ping

2010-03-01T23:59:59.000Z

471

LiSP: A lightweight security protocol for wireless sensor networks  

Science Conference Proceedings (OSTI)

Small low-cost sensor devices with limited resources are being used widely to build a self-organizing wireless network for various applications, such as situation monitoring and asset surveillance. Making such a sensor network secure is crucial to their ... Keywords: Authentication, key management, lightweight security, sensor networks

Taejoon Park; Kang G. Shin

2004-08-01T23:59:59.000Z

472

Integration of false data detection with data aggregation and confidential transmission in wireless sensor networks  

Science Conference Proceedings (OSTI)

In wireless sensor networks, compromised sensor nodes can inject false data during both data aggregation and data forwarding. The existing false data detection techniques consider false data injections during data forwarding only and do not allow any ... Keywords: data aggregation, data integrity, network-level security, sensor networks

Suat Ozdemir; Hasan Çam

2010-06-01T23:59:59.000Z

473

Measuring air quality in city areas by vehicular wireless sensor networks  

Science Conference Proceedings (OSTI)

This paper considers a micro-climate monitoring scenario, which usually requires deploying a large number of sensor nodes to capture environmental information. By exploiting vehicular sensor networks (VSNs), it is possible to equip fewer nodes on cars ... Keywords: Micro-climate monitoring, Opportunistic communication, Pervasive computing, Vehicular sensor network, Wireless sensor network

Shu-Chiung Hu; You-Chiun Wang; Chiuan-Yu Huang; Yu-Chee Tseng

2011-11-01T23:59:59.000Z

474

Chinese Restaurant Game - Part II: Applications to Wireless Networking, Cloud Computing, and Online Social Networking  

E-Print Network (OSTI)

In Part I of this two-part paper [1], we proposed a new game, called Chinese restaurant game, to analyze the social learning problem with negative network externality. The best responses of agents in the Chinese restaurant game with imperfect signals are constructed through a recursive method, and the influence of both learning and network externality on the utilities of agents is studied. In Part II of this two-part paper, we illustrate three applications of Chinese restaurant game in wireless networking, cloud computing, and online social networking. For each application, we formulate the corresponding problem as a Chinese restaurant game and analyze how agents learn and make strategic decisions in the problem. The proposed method is compared with four common-sense methods in terms of agents' utilities and the overall system performance through simulations. We find that the proposed Chinese restaurant game theoretic approach indeed helps agents make better decisions and improves the overall system performan...

Wang, Chih-Yu; Liu, K J Ray

2011-01-01T23:59:59.000Z

475

A mobile-agent based wireless sensing network for structural monitoring applications  

SciTech Connect

A new wireless sensing network paradigm is presented for structural monitoring applications. In this approach, both power and data interrogation commands are conveyed via a mobile agent that is sent to sensor nodes to perform intended interrogations, which can alleviate several limitations of the traditional sensing networks. Furthermore, the mobile agent provides computational power to make near real-time assessments on the structural conditions. This paper will discuss such prototype systems, which are used to interrogate impedance-based sensors for structural health monitoring applications. Our wireless sensor node is specifically designed to accept various energy sources, including wireless energy transmission, and to be wirelessly triggered on an as-needed basis by the mobile agent or other sensor nodes. The capabilities of this proposed sensing network paradigm are demonstrated in the laboratory and the field.

Taylor, Stuart G [Los Alamos National Laboratory; Farinholt, Kevin M [Los Alamos National Laboratory; Figueiredo, Eloi [Los Alamos National Laboratory; Park, Gyuhae [Los Alamos National Laboratory; Farrar, Charles R [Los Alamos National Laboratory; Flynn, Eric B [UCSD; Mascarenas, David L [UCSD; Todd, Michael D [UCSD

2008-01-01T23:59:59.000Z

476

A two-objective evolutionary approach based on topological constraints for node localization in wireless sensor networks  

Science Conference Proceedings (OSTI)

Abstract: To know the location of nodes plays an important role in many current and envisioned wireless sensor network applications. In this framework, we consider the problem of estimating the locations of all the nodes of a network, based on noisy ... Keywords: Multiobjective evolutionary algorithms, Node localization, Range measurements, Stochastic optimization, Wireless sensor networks

Massimo Vecchio; Roberto López-Valcarce; Francesco Marcelloni

2012-07-01T23:59:59.000Z

477

On a joint temporal-spatial multi-channel assignment and routing scheme in resource-constrained wireless mesh networks  

Science Conference Proceedings (OSTI)

Use of multiple orthogonal channels can significantly improve network throughput of multi-hop wireless mesh networks (WMNs). In these WMNs where multiple channels are available, channel assignment is done either in a centralized manner, which unfortunately ... Keywords: Channel assignment, Linear programming (LP), Routing, Spatial, Temporal, Throughput, Wireless mesh networks (WMNs)

Yan Jin; Weiping Wang; Yingtao Jiang; Mei Yang

2012-05-01T23:59:59.000Z

478

In-kernel passive measurement of the performance impact of hidden terminals in 802.11 wireless networks  

Science Conference Proceedings (OSTI)

The negative performance impact of the presence of hidden terminals in wireless networks has been well know for decades. Despite much research in the area, many deployed networks continue to suffer a performance penalty because of hidden terminals. Ad ... Keywords: 802.11, hidden terminal collisions, passive measurement, wireless networks

Scott M. Raynel; Tony J. McGregor

2011-11-01T23:59:59.000Z

479

Energy Efficient Distributed Data Fusion In Multihop Wireless Sensor Networks  

E-Print Network (OSTI)

addresses a transmission energy problem for wireless sensoranalog case. The energy planning problem will be formulatedrest of this paper. Energy Planning Problem Formulation and

Huang, Yi

2010-01-01T23:59:59.000Z

480

Green Modulations in Energy-Constrained Wireless Sensor Networks  

E-Print Network (OSTI)

Due to the unique characteristics of sensor devices, finding the energy-efficient modulation with a low-complexity implementation (refereed to as green modulation) poses significant challenges in the physical layer design of Wireless Sensor Networks (WSNs). Toward this goal, we present an in-depth analysis on the energy efficiency of various modulation schemes using realistic models in the IEEE 802.15.4 standard to find the optimum distance-based scheme in a WSN over Rayleigh and Rician fading channels with path-loss. We describe a proactive system model according to a flexible duty-cycling mechanism utilized in practical sensor apparatus. The present analysis includes the effect of the channel bandwidth and the active mode duration on the energy consumption of popular modulation designs. Path-loss exponent and DC-DC converter efficiency are also taken into consideration. In considering the energy efficiency and complexity, it is demonstrated that among various sinusoidal carrier-based modulations, the optimi...

Abouei, Jamshid; Pasupathy, Subbarayan

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "network commercial wireless" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

A Simple Flood Forecasting Scheme Using Wireless Sensor Networks  

E-Print Network (OSTI)

This paper presents a forecasting model designed using WSNs (Wireless Sensor Networks) to predict flood in rivers using simple and fast calculations to provide real-time results and save the lives of people who may be affected by the flood. Our prediction model uses multiple variable robust linear regression which is easy to understand and simple and cost effective in implementation, is speed efficient, but has low resource utilization and yet provides real time predictions with reliable accuracy, thus having features which are desirable in any real world algorithm. Our prediction model is independent of the number of parameters, i.e. any number of parameters may be added or removed based on the on-site requirements. When the water level rises, we represent it using a polynomial whose nature is used to determine if the water level may exceed the flood line in the near future. We compare our work with a contemporary algorithm to demonstrate our improvements over it. Then we present our simulation results for t...

Seal, Victor; Maity, Shovan; Mitra, Souvik Kr; Mukherjee, Amitava; Naskar, Mrinal Kanti

2012-01-01T23:59:59.000Z

482

Poster abstract: wireless sensor network characterization - application to demand response energy pricing  

Science Conference Proceedings (OSTI)

This poster presents latency and reliability characterization of wireless sensor network as applied to an advanced building control system for demand response energy pricing. A test network provided the infrastructure to extract round trip time and packet ... Keywords: advanced building control, demand response energy pricing

Nathan Ota; Dan Hooks; Paul Wright; David Auslander; Therese Peffer

2003-11-01T23:59:59.000Z

483

A Distributed Virtual Backbone Development Scheme for Ad-Hoc Wireless Networks  

Science Conference Proceedings (OSTI)

The virtual backbone is an approach for solving routing problems in ad-hoc wireless networks. The virtual backbone approach features low latency, moderate routing overhead and is a hybrid scheme that uses the table-driven and on-demand routing ... Keywords: Steiner tree, ad-hoc networks, clustering, routing, virtual backbone

Jyh-Horng Lin; Chyi-Ren Dow; Shiow-Fen Hwang

2003-12-01T23:59:59.000Z

484

Effective-SNR estimation for wireless sensor network using Kalman filter  

Science Conference Proceedings (OSTI)

In many Wireless Sensor Network (WSN) applications, the availability of a simple yet accurate estimation of the RF channel quality is vital. However, due to measurement noise and fading effects, it is usually estimated through probe or learning based ... Keywords: Estimation, Kalman filter, Link quality, SNR, Sensor networks

Fei Qin; Xuewu Dai; John E. Mitchell

2013-05-01T23:59:59.000Z

485

A prioritized battery-aware routing protocol for wireless ad hoc networks  

Science Conference Proceedings (OSTI)

It is a challenge area in the field of ad hoc networks to support prioritized routing for time sensitive applications, such as multimedia communications, IP telephony and interactive games. However the existing protocols did not consider the special ... Keywords: battery models, battery-awareness, energy efficiency, prioritized routing, routing protocols, wireless ad hoc networks

Chi Ma; Yuanyuan Yang

2005-10-01T23:59:59.000Z

486

Mitigating attacks against virtual coordinate based routing in wireless sensor networks  

Science Conference Proceedings (OSTI)

Virtual coordinate system (VCS) based routing provides a practical, efficient and scalable means for point-to-point routing in wireless sensor networks. Several VCS-based routing protocols have been proposed in the last few years, all assuming that nodes ... Keywords: beacon vector routing, routing, secure beacon vector routing, security, sensor network routing, virtual coordinate system

Jing Dong; Kurt E. Ackermann; Brett Bavar; Cristina Nita-Rotaru

2008-03-01T23:59:59.000Z

487

Ant colony optimization with fuzzy heuristic information designed for cooperative wireless sensor networks  

Science Conference Proceedings (OSTI)

Biologically inspired networking is becoming a very active area of research and development because methods from biology have attractive features such as scalability and resilience to changes in the environment. In this paper, the authors propose a cross-layer ... Keywords: ant colony optimization, cooperative modulation diversity, fuzzy heuristic information, wireless sensor networks

Marcelo Portela Sousa; Waslon Terllizzie A. Lopes; Marcelo Sampaio de Alencar

2011-10-01T23:59:59.000Z

488

Performance analysis of energy efficient asymmetric coding and modulation schemes for wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless Sensor Networks generally operate under severe energy constraints. In many cases, the networks are star connected with battery-powered nodes sensing data and sending it to a centrally-powered base station, whose energy constraints are more fore-bearing ...

Govinda M. Kamath; Yogesh Shekar; G. Abhijith Kini; U. Sripati; Muralidhar Kulkarni

2010-05-01T23:59:59.000Z

489

Energy-efficient scheduling for multiple access in wireless sensor networks: A job scheduling method  

Science Conference Proceedings (OSTI)

With the objective to minimize the transmission energy cost, we consider the energy-efficient scheduling problem in a single hop multi-access data gathering network. We first prove by theoretical induction that transmitting with reduced powers decreases ... Keywords: Job scheduling, Multiple access channel, Polymatroid analysis, Wireless sensor networks

Xiaomao Mao; Huifang Chen; Peiliang Qiu; Zhaoyang Zhang

2010-09-01T23:59:59.000Z

490

Constrained multiple deployment problem in wireless sensor networks with guaranteed lifetimes  

Science Conference Proceedings (OSTI)

We aimed to deploy wireless sensor networks with guaranteed lifetimes for outdoor monitoring projects. The provision of a guaranteed lifetime has rarely been studied in previous deployment problems. The use of battery packs as the power source for sensors ... Keywords: Deployment problem, Guaranteed lifetime, Sensor network

Chun-Han Lin; Chung-Ta King; Ting-Yi Chen

2011-02-01T23:59:59.000Z

491

Quality-aware bandwidth allocation for scalable on-demand streaming in wireless networks  

Science Conference Proceedings (OSTI)

In this paper, we propose a scalable transport scheme for delivering on-demand video streams over broadband wireless networks in next-generation network/IP multimedia subsystem (NGN/IMS) architecture. The proposed transport scheme makes use of fine-granular-scalability ... Keywords: MPEG-4 FGS video, NGN/IMS, bandwidth allocation, video broadcasting, video streaming

Jen-Wen Ding; Der-Jiunn Deng; Tin-Yu Wu; Hsiao-Hwa Chen

2010-04-01T23:59:59.000Z

492

Simple Position Estimation for Wireless Sensor Networks Toks Adebutu Lionel Sacks Ian Marshall  

E-Print Network (OSTI)

the cost, power and processing constraints of these networks. This paper presents a solution and due to the cost, power and size constraints it is not possible to equip them with a sophisticatedSimple Position Estimation for Wireless Sensor Networks Toks Adebutu Lionel Sacks Ian Marshall

Haddadi, Hamed

493

Distributed resource allocation with fairness for cognitive radios in wireless mobile ad hoc networks  

Science Conference Proceedings (OSTI)

Both spectrum sensing and power allocation have crucial effects on the performance of wireless cognitive ad hoc networks. In order to obtain the optimal available subcarrier sets and transmission powers, we propose in this paper a distributed resource ... Keywords: Cognitive radio, Distributed resource allocation, Mobile ad hoc networks, Power control, Spectrum allocation

Songtao Guo; Chuangyin Dang; Xiaofeng Liao

2011-08-01T23:59:59.000Z

494

Supporting bursty traffic in wireless sensor networks through a distributed advertisement-based TDMA protocol (ATMA)  

Science Conference Proceedings (OSTI)

Nodes in wireless sensor networks (WSNs) are battery powered and oftentimes deployed in remote and hostile locations. Energy conservation is, therefore, one of the primary goals of MAC protocols designed for these networks. Contention-based protocols ... Keywords: Bursty traffic, Data advertisements, Hybrid, MAC protocol, TDMA, WSN

Surjya Ray; Ilker Demirkol; Wendi Heinzelman

2013-05-01T23:59:59.000Z

495

Steel, cast iron and concrete: security engineering for real world wireless sensor networks  

Science Conference Proceedings (OSTI)

What are the real security issues for a wireless sensor network (WSN) intended to monitor the structural health of a suspension bridge, a subway tunnel or a water distribution pipe? Could an attack on the sensor network cause the structure to collapse? ...

Frank Stajano; Dan Cvrcek; Matt Lewis

2008-06-01T23:59:59.000Z

496

The role of Wireless Sensor Networks in the area of Critical Information Infrastructure Protection  

Science Conference Proceedings (OSTI)

Critical Infrastructures, such as energy, banking, and transport, are an essential pillar to the well-being of the national and international economy, security and quality of life. These infrastructures are dependent on a spectrum of highly interconnected ... Keywords: Critical Information Infrastructure Protection, Network Security, Wireless Sensor Networks

Rodrigo Roman; Cristina Alcaraz; Javier Lopez

2007-01-01T23:59:59.000Z

497

An incremental deployment algorithm for wireless sensor networks using one or multiple autonomous agents  

Science Conference Proceedings (OSTI)

The paper studies the deployment problem of wireless sensor networks using one or multiple autonomous agents. An online incremental algorithm based on Voronoi partition is proposed to solve the problem, for which each agent deploys sensors one-at-a-time ... Keywords: Autonomous agent, Incremental deployment, Sensor network

Zhiyun Lin; Sijian Zhang; Gangfeng Yan

2013-01-01T23:59:59.000Z

498

SECTOR: secure tracking of node encounters in multi-hop wireless networks  

Science Conference Proceedings (OSTI)

In this paper we present SECTOR, a set of mechanisms for the secure verification of the time of encounters between nodes in multi-hop wireless networks. This information can be used notably to prevent wormhole attacks (without requiring any clock synchronization), ... Keywords: mobile networks, mobility, positioning, security, security associations

Srdjan ?apkun; Levente Buttyán; Jean-Pierre Hubaux

2003-10-01T23:59:59.000Z

499

Lighting Group: Controls: Wireless Controls  

NLE Websites -- All DOE Office Websites (Extended Search)

Wireless Controls Wireless Lighting Control System (with DUST Networks) Objective The project objectives are to: 1. Demonstrate that wireless technology can be cost-effectively...

500

MRMAC: medium reservation MAC protocol for reducing end-to-end delay and energy consumption in wireless sensor networks  

Science Conference Proceedings (OSTI)

This letter proposes a novel medium reservation MAC protocol that reduces both end-to-end delay and energy consumption for wireless sensor networks. MRMAC reduces endto-end delay by informing the intended receiver of NPAT (next packet arrival time) and ... Keywords: asynchronous, end-to-end delay, energy consumption, medium access control, wireless sensor networks

Jaeyoung Hong; Ingook Jang; Hanjin Lee; Suho Yang; Hyunsoo Yoon

2010-07-01T23:59:59.000Z