Sample records for wireless power transfer

  1. Wireless Power Transfer

    ScienceCinema (OSTI)

    None

    2013-11-19T23:59:59.000Z

    Wireless Power Transfer is an innovative approach using magnetic resonance coupling of air core transformers designed for today's growing plug-in electric vehicle market. This technology can provide a convenient, safe and flexible means to charge electric vehicles under stationary and dynamic conditions. Plug-in Electric Vehicles (PEV) are burdened by the need for cable and plug charger, galvanic isolation of the on-board electronics, bulk and cost of this charger and the large energy storage system (ESS) packs needed. With a system where you have to physically plug in there are a number of occasions where the owner could very well forget to charge the vehicle. For stationary applications (like charging of a PHEV at home), ORNL's innovative wireless power transfer technology adds a convenience factor compared to actually plugging in which will mean that the vehicle will have a full charge every morning. Electric vehicle charging must be safe, compact and efficient in order to be convenient for customers. By reconfiguring the transformer and altering the resonance frequency, energy is transferred to the battery with lower energy losses and with fewer demands on the primary circuit by the rest of the transformer system. The ORNL discovery shows that sufficient power for the battery can be transferred from the primary to secondary circuits without significant energy losses if the operating frequency is set at 50% to 95% of the resonance frequency of the circuit. The electrical power is then transmitted to the chargeable battery, which is electrically coupled to the secondary circuit through the air core transformer. Some advantages include: Reduced energy losses during transfer of energy to the battery; A charge potential that is relatively unaffected by up to 25% misalignment of vehicle; and Other receiving components draw less power from the primary circuit. These advantages allow wireless power technology applications to expand at the workplace and beyond as the demand for EV rises. For vehicles that operate over a fixed route such as busses and shuttle vehicles, Wireless Power Transfer (WPT) means that a smaller battery pack can be used. In the traditional system, the battery pack is designed to accommodate the needs of the entire route or shift. With WPT the battery can be downsized because it can be charged when the vehicle stops on its route (a rental car shuttle bus, for example, can charge when it waits in the terminal and again when it waits at the rental car place. Thus the battery only needs enough charge to get to the next stop. This decrease in battery size means significant cost savings to electrify the vehicle. This technology enables efficient "opportunity charging stations" for predefined routes and planned stops reducing down time. Charging can occur in minutes. This improvement also eliminates the harmful emissions that occur in garages while buses are at idle during charging. In larger cities, dynamic charging offers an even greater impact utilizing existing infrastructure. As vehicles travel along busy freeways and interstate systems, wireless charging can occur while the vehicle is in motion. With this technology a vehicle essentially has unlimited electric range while using a relatively small battery pack. In-motion charging stations use vehicle sensors to alert the driver. Traveling at normal speeds, sensors establish in-motion charging. WPT transmit pads sequentially energize to the negotiated power level based on vehicle speed and its requested charging energy. Lower power when vehicle speed is slow and much higher power for faster moving vehicles. Vehicle to Infrastructure communications (V2I) coordinates WPT charging level according to on-board battery pack state-of-charge. V2I activates the roadway transmit pads placing them in standby mode and negotiates charging fee based on prevailing grid rate and vehicle energy demand. Dynamic charging would allow electricity to supply a very large fraction of the energy for the transportation sector and reduce greatly petroleum consump

  2. Wireless Power Transfer

    SciTech Connect (OSTI)

    None

    2013-07-22T23:59:59.000Z

    Wireless Power Transfer is an innovative approach using magnetic resonance coupling of air core transformers designed for today's growing plug-in electric vehicle market. This technology can provide a convenient, safe and flexible means to charge electric vehicles under stationary and dynamic conditions. Plug-in Electric Vehicles (PEV) are burdened by the need for cable and plug charger, galvanic isolation of the on-board electronics, bulk and cost of this charger and the large energy storage system (ESS) packs needed. With a system where you have to physically plug in there are a number of occasions where the owner could very well forget to charge the vehicle. For stationary applications (like charging of a PHEV at home), ORNL's innovative wireless power transfer technology adds a convenience factor compared to actually plugging in which will mean that the vehicle will have a full charge every morning. Electric vehicle charging must be safe, compact and efficient in order to be convenient for customers. By reconfiguring the transformer and altering the resonance frequency, energy is transferred to the battery with lower energy losses and with fewer demands on the primary circuit by the rest of the transformer system. The ORNL discovery shows that sufficient power for the battery can be transferred from the primary to secondary circuits without significant energy losses if the operating frequency is set at 50% to 95% of the resonance frequency of the circuit. The electrical power is then transmitted to the chargeable battery, which is electrically coupled to the secondary circuit through the air core transformer. Some advantages include: Reduced energy losses during transfer of energy to the battery; A charge potential that is relatively unaffected by up to 25% misalignment of vehicle; and Other receiving components draw less power from the primary circuit. These advantages allow wireless power technology applications to expand at the workplace and beyond as the demand for EV rises. For vehicles that operate over a fixed route such as busses and shuttle vehicles, Wireless Power Transfer (WPT) means that a smaller battery pack can be used. In the traditional system, the battery pack is designed to accommodate the needs of the entire route or shift. With WPT the battery can be downsized because it can be charged when the vehicle stops on its route (a rental car shuttle bus, for example, can charge when it waits in the terminal and again when it waits at the rental car place. Thus the battery only needs enough charge to get to the next stop. This decrease in battery size means significant cost savings to electrify the vehicle. This technology enables efficient "opportunity charging stations" for predefined routes and planned stops reducing down time. Charging can occur in minutes. This improvement also eliminates the harmful emissions that occur in garages while buses are at idle during charging. In larger cities, dynamic charging offers an even greater impact utilizing existing infrastructure. As vehicles travel along busy freeways and interstate systems, wireless charging can occur while the vehicle is in motion. With this technology a vehicle essentially has unlimited electric range while using a relatively small battery pack. In-motion charging stations use vehicle sensors to alert the driver. Traveling at normal speeds, sensors establish in-motion charging. WPT transmit pads sequentially energize to the negotiated power level based on vehicle speed and its requested charging energy. Lower power when vehicle speed is slow and much higher power for faster moving vehicles. Vehicle to Infrastructure communications (V2I) coordinates WPT charging level according to on-board battery pack state-of-charge. V2I activates the roadway transmit pads placing them in standby mode and negotiates charging fee based on prevailing grid rate and vehicle energy demand. Dynamic charging would allow electricity to supply a very large fraction of the energy for the transportation sector and reduce greatly petroleum consump

  3. Lunar Wireless Power Transfer Feasibility Study

    SciTech Connect (OSTI)

    Sheldon Freid, et al.

    2008-06-01T23:59:59.000Z

    This study examines the feasibility of a multi-kilowatt wireless radio frequency (RF) power system to transfer power between lunar base facilities. Initial analyses, show that wireless power transfer (WPT) systems can be more efficient and less expensive than traditional wired approaches for certain lunar and terrestrial applications. The study includes evaluations of the fundamental limitations of lunar WPT systems, the interrelationships of possible operational parameters, and a baseline design approach for a notionial system that could be used in the near future to power remote facilities at a lunar base. Our notional system includes state-of-the-art photovoltaics (PVs), high-efficiency microwave transmitters, low-mass large-aperture high-power transmit antennas, high-efficiency large-area rectenna receiving arrays, and reconfigurable DC combining circuitry.

  4. Adaptive primary side control for a wireless power transfer optimization

    E-Print Network [OSTI]

    Bogoda, Thilani Imanthika Dissanayake

    2012-01-01T23:59:59.000Z

    A resonant inductive wireless power transfer system, consisting of a primary (transmitter) circuit and secondary (receiver) circuit, was designed and implemented. This document also contains a novel indirect feedback method ...

  5. Wireless Power Transfer for Electric Vehicles

    SciTech Connect (OSTI)

    Scudiere, Matthew B [ORNL; McKeever, John W [ORNL

    2011-01-01T23:59:59.000Z

    As Electric and Hybrid Electric Vehicles (EVs and HEVs) become more prevalent, there is a need to change the power source from gasoline on the vehicle to electricity from the grid in order to mitigate requirements for onboard energy storage (battery weight) as well as to reduce dependency on oil by increasing dependency on the grid (our coal, gas, and renewable energy instead of their oil). Traditional systems for trains and buses rely on physical contact to transfer electrical energy to vehicles in motion. Until recently, conventional magnetically coupled systems required a gap of less than a centimeter. This is not practical for vehicles of the future.

  6. Simulation of a Wireless Power Transfer System for Electric Vehicles with Power Factor Correction

    SciTech Connect (OSTI)

    Pickelsimer, Michael C [ORNL; Tolbert, Leon M [ORNL; Ozpineci, Burak [ORNL; Miller, John M [ORNL

    2012-01-01T23:59:59.000Z

    Wireless power transfer has been a popular topic of recent research. Most research has been done to address the limitations of coil-to-coil efficiency. However, little has been done to address the problem associated with the low input power factor with which the systems operate. This paper details the steps taken to analyze a wireless power transfer system from the view of the power grid under a variety of loading conditions with and without power factor correction.

  7. Advanced Wireless Power Transfer Vehicle and Infrastructure Analysis (Presentation)

    SciTech Connect (OSTI)

    Gonder, J.; Brooker, A.; Burton, E.; Wang, J.; Konan, A.

    2014-06-01T23:59:59.000Z

    This presentation discusses current research at NREL on advanced wireless power transfer vehicle and infrastructure analysis. The potential benefits of E-roadway include more electrified driving miles from battery electric vehicles, plug-in hybrid electric vehicles, or even properly equipped hybrid electric vehicles (i.e., more electrified miles could be obtained from a given battery size, or electrified driving miles could be maintained while using smaller and less expensive batteries, thereby increasing cost competitiveness and potential market penetration). The system optimization aspect is key given the potential impact of this technology on the vehicles, the power grid and the road infrastructure.

  8. Magnetic Resonant Coupling As a Potential Means for Wireless Power Transfer to Multiple Small Receivers

    E-Print Network [OSTI]

    Cannon, Benjamin Louis

    Wireless power transfer via magnetic resonant coupling is experimentally demonstrated in a system with a large source coil and either one or two small receivers. Resonance between source and load coils is achieved with ...

  9. Wireless power transfer for scaled electronic biomedical implants

    E-Print Network [OSTI]

    Theilmann, Paul Thomas

    2012-01-01T23:59:59.000Z

    S   67 Figure 2.16: Power loss due to induced eddyFigure 4.9: Instantaneous power loss in branch 1 versus time6 slope which describes power loss versus distance for an

  10. Wireless power transfer for scaled electronic biomedical implants

    E-Print Network [OSTI]

    Theilmann, Paul Thomas

    2012-01-01T23:59:59.000Z

    System Model .. 105 3.3.1 Model Verification . 108 Summary . 112 References .. 113 Chapter 4 Low Power

  11. Oak Ridge National Laboratory Wireless Power Transfer Development for Sustainable Campus Initiative

    SciTech Connect (OSTI)

    Onar, Omer C [ORNL] [ORNL; Miller, John M [ORNL] [ORNL; Campbell, Steven L [ORNL] [ORNL; Coomer, Chester [ORNL] [ORNL; White, Cliff P [ORNL] [ORNL; Seiber, Larry Eugene [ORNL] [ORNL

    2013-01-01T23:59:59.000Z

    Wireless power transfer (WPT) is a convenient, safe, and autonomous means for electric and plug-in hybrid electric vehicle charging that has seen rapid growth in recent years for stationary applications. WPT does not require bulky contacts, plugs, and wires, is not affected by dirt or weather conditions, and is as efficient as conventional charging systems. This study summarizes some of the recent Sustainable Campus Initiative activities of Oak Ridge National Laboratory (ORNL) in WPT charging of an on-campus vehicle (a Toyota Prius plug-in hybrid electric vehicle). Laboratory development of the WPT coils, high-frequency power inverter, and overall systems integration are discussed. Results cover the coil performance testing at different operating frequencies, airgaps, and misalignments. Some of the experimental results of insertion loss due to roadway surfacing materials in the air-gap are presented. Experimental lessons learned are also covered in this study.

  12. Impact of Wireless Power Transfer in Transportation: Future Transportation Enabler, or Near Term Distraction

    SciTech Connect (OSTI)

    Onar, Omer C [ORNL; Jones, Perry T [ORNL

    2014-01-01T23:59:59.000Z

    While the total liquid fuels consumed in the U.S. for transportation of goods and people is expected to hold steady, or decline slightly over the next few decades, the world wide consumption is projected to increase of over 30% according to the Annual Energy Outlook 2014 [1]. The balance of energy consumption for transportation between petroleum fuels and electric energy, and the related greenhouse gas (GHG) emissions produced consuming either, is of particular interest to government administrations, vehicle OEMs, and energy suppliers. The market adoption of plug-in electric vehicles (PEVs) appears to be inhibited by many factors relating to the energy storage system (ESS) and charging infrastructure. Wireless power transfer (WPT) technologies have been identified as a key enabling technology to increase the acceptance of EVs. Oak Ridge National Laboratory (ORNL) has been involved in many research areas related to understanding the impacts, opportunities, challenges and costs related to various deployments of WPT technology for transportation use. Though the initial outlook for WPT deployment looks promising, many other emerging technologies have met unfavorable market launches due to unforeseen technology limitations, sometimes due to the complex system in which the new technology was placed. This paper will summarize research and development (R&D) performed at ORNL in the area of Wireless Power Transfer (WPT). ORNL s advanced transportation technology R&D activities provide a unique set of experienced researchers to assist in the creation of a transportation system level view. These activities range from fundamental technology development at the component level to subsystem controls and interactions to applicable system level analysis of impending market and industry responses and beyond.

  13. Wireless energy transfer between anisotropic metamaterials shells

    SciTech Connect (OSTI)

    Díaz-Rubio, Ana; Carbonell, Jorge; Sánchez-Dehesa, José, E-mail: jsdehesa@upv.es

    2014-06-15T23:59:59.000Z

    The behavior of strongly coupled Radial Photonic Crystals shells is investigated as a potential alternative to transfer electromagnetic energy wirelessly. These sub-wavelength resonant microstructures, which are based on anisotropic metamaterials, can produce efficient coupling phenomena due to their high quality factor. A configuration of selected constitutive parameters (permittivity and permeability) is analyzed in terms of its resonant characteristics. The coupling to loss ratio between two coupled resonators is calculated as a function of distance, the maximum (in excess of 300) is obtained when the shells are separated by three times their radius. Under practical conditions an 83% of maximum power transfer has been also estimated. -- Highlights: •Anisotropic metamaterial shells exhibit high quality factors and sub-wavelength size. •Exchange of electromagnetic energy between shells with high efficiency is analyzed. •Strong coupling is supported with high wireless transfer efficiency. •End-to-end energy transfer efficiencies higher than 83% can be predicted.

  14. Experimental Results with two Wireless Power Transfer Systems Alanson Sample1,2

    E-Print Network [OSTI]

    Herr, Hugh

    thermometer/hygrometer with LCD display using only RF power harvested from a TV transmission tower. II. WISP of up to several meters from the reader. The second system harvests VHF or UHF energy from TV towers or UHF energy from TV towers. We describe an experiment in which we powered a commercially available

  15. Power Management in Wireless Networks Kevin Klues

    E-Print Network [OSTI]

    Jain, Raj

    Power Management in Wireless Networks Kevin Klues Abstract This paper presents a survey on the various power saving techniques used in wireless networking today. The work presented covers topics at each layer of a wireless networking protocol stack. The types of wireless networks considered include

  16. GNU Radio & USRPGNU Radio & USRP File transfer through WirelessFile transfer through Wireless

    E-Print Network [OSTI]

    Yu, Chansu

    1 GNU Radio & USRPGNU Radio & USRP File transfer through WirelessFile transfer through WirelessSachin Hirve April 30, 2008April 30, 2008 Contents:Contents: What is Software Radio?What is Software Radio? USRPUSRP ­­ MultiMulti--functional hardwarefunctional hardware GNU RadioGNU Radio Previous Work

  17. Power Control in Wireless Cellular Networks

    E-Print Network [OSTI]

    Chiang, Mung

    Power Control in Wireless Cellular Networks #12;#12;Power Control in Wireless Cellular Networks R in Networking sample Vol. x, No y (2008) 1­156 c 2008 Power Control in Wireless Cellular Networks, and connectivity. Power control in both uplink and downlink of a cellular network has been extensively studied

  18. Fractional Power Control for Decentralized Wireless Networks

    E-Print Network [OSTI]

    Jindal, Nihar

    1 Fractional Power Control for Decentralized Wireless Networks Nihar Jindal, Steven Weber, Jeffrey G. Andrews Abstract We propose and analyze a new paradigm for power control in decentralized wireless networks, termed fractional power control. Transmission power is chosen as the current channel

  19. Distributed Power Control Algorithms for Wireless Networks

    E-Print Network [OSTI]

    Bertsekas, Dimitri

    Distributed Power Control Algorithms for Wireless Networks Cynara C. Wu Dimitri P. Bertsekas cynara Cambridge, MA 02139, USA Abstract Power control has been shown to be an e ective way to increase capacity in wireless systems. In previous work on power control, it has been assumed that power levels can be assigned

  20. History of wireless power transmission

    SciTech Connect (OSTI)

    Brown, W.C. [Microwave Power Transmission Systems, Weston, MA (United States)] [Microwave Power Transmission Systems, Weston, MA (United States)

    1996-12-31T23:59:59.000Z

    The history of wireless power transmission at microwave frequencies is reviewed with emphasis upon the time period starting with the post World War II efforts to use the new microwave technology developed during the war. A nationally televised demonstration of a microwave powered helicopter at the Spencer Laboratory of the Raytheon Co., in 1964 was the result of these early efforts and broadly introduced the concept of wireless power transmission to scientific and engineering communities and to the public. Subsequent development efforts centered on improving the efficiency of the interconversion of d.c. and microwave power at the ends of the system to reach a demonstrated overall d.c. to d.c. system efficiency of 54% in 1974. The response to the requirements of applications such as the Solar Power Satellite and high altitude microwave powered aircraft have changed the direction of technology development and greatly expanded the technology base. Recent and current efforts are centered on examining the use of higher frequencies than the baseline 2.45 GHz, and in reducing the system costs at 2.45 GHz. 26 refs., 14 figs.

  1. Optimal Power Management in Wireless Control Systems

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    Optimal Power Management in Wireless Control Systems Konstantinos Gatsis, Student Member, IEEE to the controller over a wireless fading channel. The power allocated to these transmissions determines state. The goal is to design plant input and transmit power policies that minimize an infinite horizon

  2. Virtualizing Power Cords by Wireless Power Transmission and Energy Harvesting

    E-Print Network [OSTI]

    Tentzeris, Manos

    technology can be called the virtualization of the communication line, wireless power transmissionVirtualizing Power Cords by Wireless Power Transmission and Energy Harvesting Yoshihiro Kawahara1 for the virtualization of power cords for electrical devices. The first approach is a new concept for routing electric

  3. Efficient performance optimisation of wireless power transmission using

    E-Print Network [OSTI]

    Myung, Noh-Hoon

    Efficient performance optimisation of wireless power transmission using genetic algorithm Junghoon [1], are attracting attention for a mid-range energy transfer because these systems are so useful) to analyse and extract the parameters from the equivalent circuit model and to calculate the optimal values

  4. Dynamic Wireless Power Transfer Feasibility

    Broader source: Energy.gov [DOE]

    2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

  5. Transmission Power Management for Wireless Health Applications

    E-Print Network [OSTI]

    Amini, Navid

    2012-01-01T23:59:59.000Z

    channel and energy efficient topology design for wirelessChris Blondia Design of Energy Efficient Topologies forEnergy-Efficient Signal Processing in Wearable Embedded Systems: An Optimal Feature Selection Approach,” 2012 International Symposium on Low Power Electronics and Design,

  6. Power Management Mechanism Exploiting Network and Video Information over Wireless

    E-Print Network [OSTI]

    Bouras, Christos

    Power Management Mechanism Exploiting Network and Video Information over Wireless Links Christos information from higher network layers may be utilized for more efficient power management in wireless- tune transmission power according to information received from the transport (feedback reports from

  7. Power Control Algorithms in Wireless Communications

    E-Print Network [OSTI]

    Power Control Algorithms in Wireless Communications Judd Rohwer , Chaouki T. Abdallah , Aly El-Osery 1 Abstract This paper presents a comprehensive review of the published algorithms on power control) and Time Division Multiple Access (TDMA). 2 Introduction Power control in cellular systems is applied

  8. Distributed Power Control in Wireless Communication Systems

    E-Print Network [OSTI]

    Chronopoulos, Anthony T.

    Distributed Power Control in Wireless Communication Systems S. Jagannathan A. T. Chronopoulos, S layered structure in that we jointly address the issue of transmitted power levels in point to point commu the transmitter power at a given node increases not only the operating life of the bat- tery but also the overall

  9. The Power of Non-Uniform Wireless Power

    E-Print Network [OSTI]

    The Power of Non-Uniform Wireless Power ETH Zurich ­ Distributed Computing Group Magnus M-To-Interference-Plus-Noise Ratio (SINR) Formula Minimum signal- to-interference ratio Power level of sender u Path-loss exponent Noise Distance between two nodes Received signal power from sender Received signal power from all other

  10. Power Sources for Wireless Sensor Abstract. Wireless sensor networks are poised to become a very significant

    E-Print Network [OSTI]

    Frechette, Luc G.

    Power Sources for Wireless Sensor Networks Abstract. Wireless sensor networks are poised to become a very significant enabling technology in many sectors. Already a few very low power wireless sensor environment, alternative power sources must be employed. This paper reviews many potential power sources

  11. A Lightweight Framework for Source-to-Sink Data Transfer in Wireless Sensor Networks

    E-Print Network [OSTI]

    Krishnamurthy, Srikanth

    -- Lightweight protocols that are both bandwidth and power thrifty are desirable for sensor networks. In additionA Lightweight Framework for Source-to-Sink Data Transfer in Wireless Sensor Networks J. Jobin, for many sensor network applications, timeliness of data delivery at a sink that collects and interprets

  12. Magnetic Resonant Wireless Power Delivery for Distributed Sensor and Wireless Systems

    E-Print Network [OSTI]

    Cervesato, Iliano

    Magnetic Resonant Wireless Power Delivery for Distributed Sensor and Wireless Systems Brian J. Lee, Pittsburgh, PA 15213 Abstract-- In this paper we report on a resonant wireless power delivery system using to loads distributed in the system. We experimentally map the power distribution for one and multiple loads

  13. Power and Delay Optimization in Multi-Hop Wireless Networks

    E-Print Network [OSTI]

    Shihada, Basem

    In this paper, we study the optimization problem of transmission power and delay in a multi-hop wireless network of transmission power and queueing delay in wireless networks has1 Power and Delay Optimization in Multi-Hop Wireless Networks Li Xia, Basem Shihada Abstract

  14. Efficient Transmitters and Receivers for High-Power Wireless Powering Systems

    E-Print Network [OSTI]

    Popovic, Zoya

    Efficient Transmitters and Receivers for High-Power Wireless Powering Systems Zoya Popovic, Tibault of a wireless powering system is maximized when the power transmitter power-added efficiency (PAE), power system, which is valid for any type of wireless power coupling. Experimental results for high

  15. Embargoed: Not for release until 2:00 pm U.S. Eastern Time Thursday, 07 June 2007. MIT TEAM EXPERIMENTALLY DEMONSTRATES WIRELESS POWER TRANSFER, POTENTIALLY

    E-Print Network [OSTI]

    Soljačić, Marin

    and the appliance. The MIT team refers to their concept as "WiTricity" (as in Wireless Electricity). The work and the device, as well as a sophisticated tracking mechanism when the device is mobile. In contrast, WiTricity

  16. Efficient weakly-radiative wireless energy transfer: An EIT-like approach

    E-Print Network [OSTI]

    Soljačić, Marin

    coupling on which witricity-type wireless energy transfer is based. We show that in certain parameter

  17. Watt-Level Wireless Power Transfer Based on Stacked Flex Circuit Technology Xuehong Yu, Florian Herrault, Chang-Hyeon Ji, Seong-Hyok Kim, Mark G. Allen

    E-Print Network [OSTI]

    significant interest as a potential approach for contactless battery charging [1] [2] as well as data. It was measured to have an inductance of 17 H and a Q-factor of 50 at 300 kHz with an outer diameter of 5 cm with receiver coils and wirelessly charged when being coupled closely to the transmitter coils. The mechanism

  18. On Adjusting Power to Defend Wireless Networks from Jamming

    E-Print Network [OSTI]

    Xu, Wenyuan

    1 On Adjusting Power to Defend Wireless Networks from Jamming Wenyuan Xu Department of Computer}@engr.sc.edu Abstract-- Wireless networks are susceptible to accidental or intentional radio interference. One way, we turn to examining the more complicated scenario consisting of a multi- hop wireless network. We

  19. Thermoelectric powered wireless sensors for spent fuel monitoring

    SciTech Connect (OSTI)

    Carstens, T.; Corradini, M.; Blanchard, J. [Dept. of Engineering Physics, Univ. of Wisconsin-Madison, Madison, WI 53706 (United States); Ma, Z. [Dept. of Electrical and Computer Engineering, Univ. of Wisconsin-Madison, Madison, WI 53706 (United States)

    2011-07-01T23:59:59.000Z

    This paper describes using thermoelectric generators to power wireless sensors to monitor spent nuclear fuel during dry-cask storage. OrigenArp was used to determine the decay heat of the spent fuel at different times during the service life of the dry-cask. The Engineering Equation Solver computer program modeled the temperatures inside the spent fuel storage facility during its service life. The temperature distribution in a thermoelectric generator and heat sink was calculated using the computer program Finite Element Heat Transfer. From these temperature distributions the power produced by the thermoelectric generator was determined as a function of the service life of the dry-cask. In addition, an estimation of the path loss experienced by the wireless signal can be made based on materials and thickness of the structure. Once the path loss is known, the transmission power and thermoelectric generator power requirements can be determined. This analysis estimates that a thermoelectric generator can produce enough power for a sensor to function and transmit data from inside the dry-cask throughout its service life. (authors)

  20. Implications of Power Control in Wireless Networks: A Quantitative Study

    E-Print Network [OSTI]

    Krishnamurthy, Srikanth

    Implications of Power Control in Wireless Networks: A Quantitative Study Ioannis Broustis, Jakob of power control in wireless networks can lead to two con- flicting effects. An increase- posite effects. Our primary goal in this work is to understand the implications of power control

  1. POWER CONTROL IN WIRELESS COMMUNICATIONS NETWORKS -FROM A

    E-Print Network [OSTI]

    Gustafsson, Fredrik

    POWER CONTROL IN WIRELESS COMMUNICATIONS NETWORKS - FROM A CONTROL THEORY PERSPECTIVE Fredrik of wireless cellular communications systems will be in focus and methods for transmitter power control. Relevant aspects of power control are discussed with emphasis on practical issues, using an automatic

  2. An Optimal Power Management Policy for Wireless Communication Devices

    E-Print Network [OSTI]

    1 An Optimal Power Management Policy for Wireless Communication Devices C.F. Chiasserini, E to the problem of energy consumption in wireless networks, which exploits the dynamic power management concept to return to the active state. Power management policies are typically used to control the state

  3. A Realistic Power Consumption Model for Wireless Sensor Network Devices

    E-Print Network [OSTI]

    Hempstead, Mark

    . Recent analyses of WSN energy efficiency have been widely based on a sensor node power consumption model1 A Realistic Power Consumption Model for Wireless Sensor Network Devices Qin Wang, Mark Hempstead}@eecs.harvard.edu Abstract-- A realistic power consumption model of wireless communication subsystems typically used in many

  4. Solar-Powered Smart Wireless Camera Network for Outdoor Monitoring

    E-Print Network [OSTI]

    Abas, Kevin Mathys

    2015-01-01T23:59:59.000Z

    Solar-Powered Wireless Visual SensorProtocols . . . . . . . . . . . . . Solar HarvestingCard B MSP430 Firmware Source C Solar Harvesting Efficiency

  5. Power Management Mechanism Exploiting Network and Video Information over Wireless

    E-Print Network [OSTI]

    Bouras, Christos

    Power Management Mechanism Exploiting Network and Video Information over Wireless Links Christos- layer information from higher network layers may be utilized for more efficient power management that fine- tune transmission power according to information received from the transport (feedback reports

  6. Maximum Throughput Power Control in CDMA Wireless Networks

    E-Print Network [OSTI]

    Mellor-Crummey, John

    Maximum Throughput Power Control in CDMA Wireless Networks Anastasios Giannoulis Department introduce cross­layer, distributed power control algorithms that guarantee maximum possible data throughput performing dynamic routing and scheduling together with power control. The cross­layer interaction consists

  7. Demo Abstract: A Unified Architecture for Flexible Radio Power Management in Wireless Sensor Networks

    E-Print Network [OSTI]

    Lu, Chenyang

    Demo Abstract: A Unified Architecture for Flexible Radio Power Management in Wireless Sensor Terms Experimentation, Design Keywords Wireless Sensor Networks, Radio Power Management, Architecture, Framework 1 Overview Radio power management is of paramount concern in wireless sensor networks. While

  8. Power Management for Wireless Sensor Networks Based on Energy Budgets

    E-Print Network [OSTI]

    Turau, Volker

    Power Management for Wireless Sensor Networks Based on Energy Budgets Christian Renner Institute with wireless sensor networks powered by energy-harvesting supplies. We introduce the concept of an energy budget, the amount of energy available to a sensor node for a given period of time. The presented tools

  9. Energy Efficient Scheduling with Power Control for Wireless Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Energy Efficient Scheduling with Power Control for Wireless Networks Bastian Katz Institute the complexity of scheduling with power control in the SINRG model of interference. Based on a novel scheme without power control are also solutions if power control is possible, power control can be exploited

  10. 1872 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 11, NO. 5, MAY 2012 Power-Trading in Wireless Communications

    E-Print Network [OSTI]

    Jayaweera, Sudharman K.

    1872 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 11, NO. 5, MAY 2012 Power-Trading the concept of power trading in wireless communications. We present a business model using sealed bid procurement auction based game theory for power-trading in cooperative wireless communication with quality

  11. Transmission Power Management for Wireless Health Applications

    E-Print Network [OSTI]

    Amini, Navid

    2012-01-01T23:59:59.000Z

    Characterization of Smart Insoles Wireless Communications .. 65   5.2.1 Effect of Packet Size on Battery

  12. Power Optimal Connectivity and Coverage in Wireless Sensor Networks

    E-Print Network [OSTI]

    Bystroff, Chris

    1 Power Optimal Connectivity and Coverage in Wireless Sensor Networks Metin Inanc, Malik Magdon links, there are fundamental differences between a sensor network and other wireless ad-hoc networks programming/Optimization I. INTRODUCTION This work considers a sensor network which is com- prised of a large

  13. Wireless Scheduling with Power Control Magnus M. Halldorsson

    E-Print Network [OSTI]

    Halldórsson, Magnús M.

    Wireless Scheduling with Power Control Magn´us M. Halld´orsson February 23, 2011 Abstract We the time for satisfying all requests. We study here the combined problem of scheduling and power control constraints. In this paper, we focus on the power control version, where we also choose the power settings

  14. Wireless Scheduling with Power Control Magnus M. Halldorsson

    E-Print Network [OSTI]

    Halldórsson, Magnús M.

    Wireless Scheduling with Power Control Magn´us M. Halld´orsson September 27, 2010 Abstract We the time for satisfying all requests. We study here the combined problem of scheduling and power control on the power control version, where we also choose the power settings for the links. The scheduling problem

  15. Power transfer through strongly coupled resonances

    E-Print Network [OSTI]

    Kurs, André

    2007-01-01T23:59:59.000Z

    Using self-resonant coils in a strongly coupled regime, we experimentally demonstrate efficient non-radiative power transfer over distances of up to eight times the radius of the coils. We use this system to transfer 60W ...

  16. Low Power Adaptive Equaliser Architectures for Wireless LMMSE Receivers 

    E-Print Network [OSTI]

    Tennant, Mark P

    2007-01-01T23:59:59.000Z

    Power consumption requires critical consideration during system design for portable wireless communication devices as it has a direct influence on the battery weight and volume required for operation. Wideband Code ...

  17. Wireless power transmission utilizing a phased array of Tesla coils

    E-Print Network [OSTI]

    Stark, Joseph C. (Joseph Charles), 1980-

    2004-01-01T23:59:59.000Z

    This thesis discusses the theory and design of coupled resonant systems and how they can be linked in a phased array for the wireless transmission of electrical power. A detailed derivation of their operational theory is ...

  18. Low Power Filtering Techniques for Wideband and Wireless Applications 

    E-Print Network [OSTI]

    Gambhir, Manisha

    2010-10-12T23:59:59.000Z

    This dissertation presents design and implementation of continuous time analog filters for two specific applications: wideband analog systems such as disk drive channel and low-power wireless applications. Specific focus has been techniques...

  19. Low Power Filtering Techniques for Wideband and Wireless Applications

    E-Print Network [OSTI]

    Gambhir, Manisha

    2010-10-12T23:59:59.000Z

    This dissertation presents design and implementation of continuous time analog filters for two specific applications: wideband analog systems such as disk drive channel and low-power wireless applications. Specific focus has been techniques...

  20. Efficient near-field wireless energy transfer using adiabatic system variations

    DOE Patents [OSTI]

    Hamam, Rafif E.; Karalis, Aristeidis; Joannopoulos, John D.; Soljacic, Marin

    2013-01-29T23:59:59.000Z

    Disclosed is a method for transferring energy wirelessly including transferring energy wirelessly from a first resonator structure to an intermediate resonator structure, wherein the coupling rate between the first resonator structure and the intermediate resonator structure is .kappa..sub.1B, transferring energy wirelessly from the intermediate resonator structure to a second resonator structure, wherein the coupling rate between the intermediate resonator structure and the second resonator structure is .kappa..sub.B2, and during the wireless energy transfers, adjusting at least one of the coupling rates .kappa..sub.1B and .kappa..sub.B2 to reduce energy accumulation in the intermediate resonator structure and improve wireless energy transfer from the first resonator structure to the second resonator structure through the intermediate resonator structure.

  1. Efficient near-field wireless energy transfer using adiabatic system variations

    DOE Patents [OSTI]

    Hamam, Rafif E; Karalis, Aristeidis; Joannopoulos, John D; Soljacic, Marin

    2014-09-16T23:59:59.000Z

    Disclosed is a method for transferring energy wirelessly including transferring energy wirelessly from a first resonator structure to an intermediate resonator structure, wherein the coupling rate between the first resonator structure and the intermediate resonator structure is .kappa..sub.1B, transferring energy wirelessly from the intermediate resonator structure to a second resonator structure, wherein the coupling rate between the intermediate resonator structure and the second resonator structure is .kappa..sub.B2, and during the wireless energy transfers, adjusting at least one of the coupling rates .kappa..sub.1B and .kappa..sub.B2 to reduce energy accumulation in the intermediate resonator structure and improve wireless energy transfer from the first resonator structure to the second resonator structure through the intermediate resonator structure.

  2. Empirical Analysis of Transmission Power Control Algorithms for Wireless

    E-Print Network [OSTI]

    California at Berkeley, University of

    Empirical Analysis of Transmission Power Control Algorithms for Wireless Sensor Networks CENTS sensor network testbed. #12;Related Work · Some number of works tried to adjust radio transmission power command in WSN. · Many-to-one · In-network processing. #12;Index · Description of transmission power

  3. SHUSH: Reactive Transmit Power Control For Wireless MAC Protocols

    E-Print Network [OSTI]

    Han, Richard Y.

    SHUSH: Reactive Transmit Power Control For Wireless MAC Protocols Anmol Sheth and Richard Han@cs.colorado.edu Abstract-- Asymmetric transmission ranges caused due to transmit power control have the undesirable effect access. In this paper we present a new reactive power controlled MAC protocol, SHUSH, which tackles

  4. Efficient Power Control for Broadcast in Wireless Communication Systems

    E-Print Network [OSTI]

    Chronopoulos, Anthony T.

    Efficient Power Control for Broadcast in Wireless Communication Systems A. T. Chronopoulos Computer. Therefore, controlling the transmitter power at a given node increases not only the operating life and a destination. It is essential to find effective means of power control of point-to-point, broadcasting

  5. Power Control and Capacity of Spread Spectrum Wireless Networks

    E-Print Network [OSTI]

    Tse, David

    Power Control and Capacity of Spread Spectrum Wireless Networks S.V. Hanly a;1 , and D.N. Tse b;2, there has been signif­ icant research in the area in recent years. While power control has been considered questions about optimal power control as well as the problem of charac­ terizing the resulting network

  6. Fair power and transmission rate control in wireless Eitan Altman

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Fair power and transmission rate control in wireless networks Eitan Altman Maestro project, INRIA of calls in the system; it will be studied here in conjunction with power control which is yet another tool cases. We show that the problem is a joint optimization system of the transmission rate and the power

  7. Power Control and Utility Optimization in Wireless Communication Systems

    E-Print Network [OSTI]

    Chronopoulos, Anthony T.

    Power Control and Utility Optimization in Wireless Communication Systems Dimitrie C. Popescu@cs.utsa.edu Abstract-- In this paper we present an analysis of power control algorithms established over the past with power control algorithms based on game theory established relatively recently. The analysis shows

  8. Saving Energy by Adjusting Transmission Power in Wireless Sensor Networks

    E-Print Network [OSTI]

    Rowe, Neil C.

    Saving Energy by Adjusting Transmission Power in Wireless Sensor Networks Xiao Chen Department and communication areas. Energy-efficient communication is an important issue in WSNs because of the limited power propose methods to reduce communication energy by minimizing the total sensor trans- mission power

  9. Optimal Power Allocation in Channel-Coded Wireless Sudarshan Vasudevan

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    energy. However, for many communication links, such as those employing turbo codes or sequentially transmitted RF power for receiver decoder power can result in significant improvements in overall energy transmission. The gains are particularly pronounced in wireless networks with asymmetric power costs. 1

  10. Optimal Power Allocation in ChannelCoded Wireless Sudarshan Vasudevan

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    energy. However, for many communication links, such as those employing turbo codes or sequentially transmitted RF power for receiver decoder power can result in significant improvements in overall energy transmission. The gains are particularly pronounced in wireless networks with asymmetric power costs. 1

  11. Power business Turning wireless power research into a top business

    E-Print Network [OSTI]

    Auckland, University of

    to replace conventional slip rings in the turbines with its wireless technology. "The challenge with wind-generation

  12. Self-powered wireless sensor system using MEMS piezoelectric micro power generator (PMPG)

    E-Print Network [OSTI]

    Xia, YuXin, M.B.A. Sloan School of Management.

    2006-01-01T23:59:59.000Z

    A thin-film lead zirconate titanate, Pb(Zr,Ti)03, MEMS Piezoelectric Micro Power Generator (PMPG) has been integrated with a commercial wireless sensor node (Telos), to demonstrate a self-powered RF temperature sensor ...

  13. Efficient Low Complexity Power Allocation Policies for Wireless Communication Systems

    E-Print Network [OSTI]

    Sharma, Vinod

    . Other benefits will be smaller diesel generators and batteries with longer life time. Thus, one of the primary challenges for Next Generation Networks (NGN) is to reduce energy consumption. In a BS the powerEfficient Low Complexity Power Allocation Policies for Wireless Communication Systems Guaranteeing

  14. Design and Characterization of a Novel Battery-less, Solar Powered Wireless Tag for Enhanced-Range

    E-Print Network [OSTI]

    Tentzeris, Manos

    Design and Characterization of a Novel Battery-less, Solar Powered Wireless Tag for Enhanced.Vyas@gatech.edu Abstract-- In this paper, a novel wireless "Battery-less Solar Powered Wireless Tag" with an enhanced range" and "ubiquitous wireless networks". This paper introduces a novel battery-less solar powered wireless tag

  15. The Power of Non-Uniform Wireless Power Magnus M. Halldorsson

    E-Print Network [OSTI]

    The Power of Non-Uniform Wireless Power Magn´us M. Halld´orsson Stephan Holzer Pradipta Mitra Roger model when power control is available. This measure characterizes the effectiveness of using oblivious power -- when the power used by a transmitter only depends on the distance to the receiver

  16. Efficient weakly-radiative wireless energy transfer: An EIT-like approach

    E-Print Network [OSTI]

    Hamam, Rafif E.

    Inspired by a quantum interference phenomenon known in the atomic physics community as electromagnetically induced transparency (EIT), we propose an efficient weakly radiative wireless energy transfer scheme between two ...

  17. Enhanced heat transfer for thermionic power modules

    SciTech Connect (OSTI)

    Johnson, D.C.

    1981-07-01T23:59:59.000Z

    The thermionic power module is capable of operating at very high heat fluxes, which in turn serve to reduce capital costs. The most efficient operation also requires uniform heat fluxes. The development of enhanced heat transfer systems is required to meet the demand for high heat fluxes (>20 w/cm/sup 2/) at high temperatures (>1500K) which advanced thermionic power modules place upon combustion systems. Energy transfer from the hot combustion gases may take place by convection, radiation, or a combination of radiation and convection. Enhanced convective heat transfer with a jet impingement system has been demonstrated in a thermionic converter. The recently-developed cellular ceramic radiative heat transfer system has also been applied to a thermionic converter. By comparing the jet impingement and cellular ceramic radiative heat transfer systems, an appropriate system may be selected for utilization in advanced thermionic power modules. Results are reported.

  18. Network Assisted Power Control 1 6/15/00 Network Assisted Power Control for Wireless Data

    E-Print Network [OSTI]

    Mandayam, Narayan

    Network Assisted Power Control 1 6/15/00 Network Assisted Power Control for Wireless Data David lesson of cellular telephone network operation is that effective power control is essential to promote system quality and efficiency. In recent we have applied microeconomic theories to power control taking

  19. A Survey of Wireless Communications for the Electric Power System

    SciTech Connect (OSTI)

    Akyol, Bora A.; Kirkham, Harold; Clements, Samuel L.; Hadley, Mark D.

    2010-01-27T23:59:59.000Z

    A key mission of the U.S. Department of Energy (DOE) Office of Electricity Delivery and Energy Reliability (OE) is to enhance the security and reliability of the nation’s energy infrastructure. Improving the security of control systems, which enable the automated control of our energy production and distribution, is critical for protecting the energy infrastructure and the integral function that it serves in our lives. The DOE-OE Control Systems Security Program provides research and development to help the energy industry actively pursue advanced security solutions for control systems. The focus of this report is analyzing how, where, and what type of wireless communications are suitable for deployment in the electric power system and to inform implementers of their options in wireless technologies. The discussions in this report are applicable to enhancing both the communications infrastructure of the current electric power system and new smart system deployments. The work described in this report includes a survey of the following wireless technologies: • IEEE 802.16 d and e (WiMAX) • IEEE 802.11 (Wi-Fi) family of a, b, g, n, and s • Wireless sensor protocols that use parts of the IEEE 802.15.4 specification: WirelessHART, International Society of Automation (ISA) 100.11a, and Zigbee • The 2, 3, and 4 generation (G )cellular technologies of GPRS/EDGE/1xRTT, HSPA/EVDO, and Long-Term Evolution (LTE)/HSPA+UMTS.

  20. Optimal Quarantining of Wireless Malware Through Power Control

    E-Print Network [OSTI]

    Sarkar, Saswati

    Optimal Quarantining of Wireless Malware Through Power Control M. H. R. Khouzani School of Electrical and Systems Engineering University of Pennsylvania Email: khouzani@seas.upenn.edu Eitan Altman.Altman@sophia.inria.fr Saswati Sarkar School of Electrical and Systems Engineering University of Pennsylvania Email

  1. Lifetime Prediction for Supercapacitor-powered Wireless Sensor Nodes

    E-Print Network [OSTI]

    Turau, Volker

    Lifetime Prediction for Supercapacitor-powered Wireless Sensor Nodes Christian Renner, J step towards reaching this goal: It explores discharging-characteristics of supercapacitors, discusses-ion polymers, supercapacitors can last for 10 years or even more. Superca- pacitors do not need a complex

  2. Using Wireless Power Meters to Measure Energy Use of

    E-Print Network [OSTI]

    Culler, David E.

    by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Technology Development, Building-term energy used by a large sample of devices due to the difficulty and expense of collecting deviceUsing Wireless Power Meters to Measure Energy Use of Miscellaneous and Electronic Devices

  3. Optimal Power Allocation in ChannelCoded Wireless Sudarshan Vasudevan

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    , while considering both transmitter circuit and signal energy. However, for many communication links in significant improvements in overall energy consumption or network lifetime versus schemes that always employ networks with asymmetric power costs. 1 Introduction Wireless ad hoc networks and, in particular, sensor

  4. Optimal Power Allocation in Channel-Coded Wireless Sudarshan Vasudevan

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    , while considering both transmitter circuit and signal energy. However, for many communication links in significant improvements in overall energy consumption or network lifetime versus schemes that always employ networks with asymmetric power costs. 1 Introduction Wireless ad hoc networks and, in particular, sensor

  5. Power Electronics Design of a Solar Powered In-car Wireless Tag for Asset Tracking and Parking Applications

    E-Print Network [OSTI]

    description Figure 1 shows the system block diagram. Maximum output power of the solar cell is extractedPower Electronics Design of a Solar Powered In-car Wireless Tag for Asset Tracking and Parking and testing of a power conditioning circuit for a solar powered in-car wireless tag for asset tracking

  6. Power Scheduling for Multi-Hop Wireless Networks

    E-Print Network [OSTI]

    Yu, Yuan

    2009-01-01T23:59:59.000Z

    The capacity of wireless networks,” IEEE Trans. Inform.capacity of hybrid wireless networks,” in Infocom, 2003, pp.larization for MIMO wireless networks,” IEEE Transactions on

  7. DOWNHOLE POWER GENERATION AND WIRELESS COMMUNICATIONS FOR INTELLIGENT COMPLETIONS APPLICATIONS

    SciTech Connect (OSTI)

    Paul Tubel

    2003-03-24T23:59:59.000Z

    The first quarter of the Downhole Power Generation and Wireless Communications for Intelligent Completions Applications was characterized by the evaluation and determination of the specifications required for the development of the system for permanent applications in wellbores to the optimization of hydrocarbon production. The system will monitor and transmit in real time pressure and temperature information from downhole using the production tubing as the medium for the transmission of the acoustic waves carrying digital information. The most common casing and tubing sizes were determined by interfacing with the major oil companies to obtain information related to their wells. The conceptual design was created for both the wireless gauge section of the tool as well as the power generation module. All hardware for the wireless gauge will be placed in an atmospheric pressure chamber located on the outside of a production tubing with 11.4 centimeter (4-1/2 inch) diameter. This mounting technique will reduce cost as well as the diameter and length of the tool and increase the reliability of the system. The power generator will use piezoelectric wafers to generate electricity based on the flow of hydrocarbons through an area in the wellbore where the tool will be deployed. The goal of the project is to create 1 Watt of power continuously.

  8. Energy Efficient Adaptation of Multicast Protocols in Power Controlled Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Prasanna, Viktor K.

    on energy efficiency in ad hoc networks. In this paper, we assume a more practical model for power controlEnergy Efficient Adaptation of Multicast Protocols in Power Controlled Wireless Ad Hoc Networks to power controlled networks is presented. Wireless nodes are assumed to have transmis- sion power control

  9. Hydraulic Wind Power Transfer Technology Afshin Izadian

    E-Print Network [OSTI]

    Zhou, Yaoqi

    Hydraulic Wind Power Transfer Technology Afshin Izadian Purdue School of Engineering and Technology of renewable energy tax credits in general and a gap in wind energy breakthroughs in particular have caused high cost of wind energy and technological dependency on countries such as China and Germany. Reducing

  10. WIRELESS ENERGY TRANSFER CAN POTENTIALLY RECHARGE LAPTOPS, CELL PHONES WITHOUT CORDS

    E-Print Network [OSTI]

    Soljačić, Marin

    , Soljaci realized that the close-range induction taking place inside a transformer -- or something similar and John Joannopoulos on the physics of electromagnetic fields, showing how wireless energy could power electric power does not require wires to be in physical contact all the way. Electric motors and power

  11. Power Control in Multiuser Mulicarrier Wireless Data Networks

    E-Print Network [OSTI]

    Warsi, Naqueeb Ahmad

    2012-01-01T23:59:59.000Z

    A game-theoretic model is presented to study the management of transmission power in a wireless data network. We propose a power game for a multiuser multicarrier setting where all the users are assumed to transmit at equal rate. At equilibrium, each user is shown to transmit over a single carrier, as in [Mehskati et al., 2006]. We derive the necessary conditions on the path gains when the Nash equilibrium point exists. We further prove the existence of the Nash equilibrium point using the concept of locally gross direction preserving map. A greedy algorithm is proposed and its correctness is established, where each user acts selfishly to achieve the Nash equilibrium point.

  12. UHF Solar Powered Active Oscillator Antenna on Low Cost Flexible Substrate for Wireless Identification Applications

    E-Print Network [OSTI]

    Tentzeris, Manos

    UHF Solar Powered Active Oscillator Antenna on Low Cost Flexible Substrate for Wireless nature of the circuit and providing operational autonomy by harvesting solar power without affecting, solar power harvesting. I. INTRODUCTION The increasing use of RFIDs and wireless sensor networks

  13. Using Variable-Range Transmission Power Control in Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Gomez-Castellanos, Javier

    Using Variable-Range Transmission Power Control in Wireless Ad Hoc Networks Javier Gomez and Andrew control on the physical and network connectivity, network capacity, and power savings of wireless multihop networks based, not on common-range which is prevalent today, but on variable-range power control. Index

  14. An Implementation of Transmit Power Control in 802.11b Wireless Networks

    E-Print Network [OSTI]

    Han, Richard Y.

    An Implementation of Transmit Power Control in 802.11b Wireless Networks Anmol Sheth Richard Han of Colorado Boulder, Colorado 80309 1 #12;An Implementation of Transmit Power Control in 802.11b Wireless levels enabled us to build and deploy an actual implementation of transmit power control. We describe

  15. Solar-powered WirelessMesh Networksfor Environmental Monitoring Torsten Braun, Thomas Staub, Benjamin Nyffenegger

    E-Print Network [OSTI]

    Braun, Torsten

    Solar-powered WirelessMesh Networksfor Environmental Monitoring Torsten Braun, Thomas Staub the development and experiencesof a solar-power driven wirelessmesh network for connectingsensorsin rural is available. II. SOLAR-POWER DRIVEN WIRELESS MESH NETWORK DEPLYOMENT AND OPERATION In a technology project

  16. Wirelessly-Powered Wireless Sensor Platform T. Paing, J. Morroni, A. Dolgov, J. Shin, J. Brannan, R. Zane, Z. Popovic

    E-Print Network [OSTI]

    Popovic, Zoya

    platform does not require battery replacements, and is intended for low- maintenance assistive technology of work has been done in the area of wireless powering, including RF inductive powering for short ranges frequencies [8]. A microcontroller manages the received power to optimally charge an on-board storage device

  17. A Compact Wireless Charging System for Electric Vehicles

    SciTech Connect (OSTI)

    Ning, Puqi [ORNL] [ORNL; Miller, John M [ORNL] [ORNL; Onar, Omer C [ORNL] [ORNL; White, Cliff P [ORNL] [ORNL

    2013-01-01T23:59:59.000Z

    In this paper, a compact high efficiency wireless power transfer system has been designed and developed. The detailed gate drive design, cooling system design, power stage development, and system assembling are presented. The successful tests verified the feasibility of wireless power transfer system to achieve over-all 90% efficiency.

  18. Abstract The process control industry has shown great interest in implementation of low cost, low power wireless sensor

    E-Print Network [OSTI]

    power transmission through metal walls using piezoelectric transducers [1], electromechanical network, low power wireless sensor networks. Such networks are much easier to deploy and reconfigure compared Wireless sensing and control networks have given machinery designers the flexibility to place network

  19. Optimal Power Allocation in Wireless Networks with Transmitter-Receiver Power Tradeoffs

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    are more pronounced in networks with asymmetric power costs. 1 Introduction Wireless ad hoc networks have. Habitat monitoring [13], environmental observation and forecasting [1], organ monitoring and health mon has some on board memory for data storage. The deployed nodes not only originate data but can also act

  20. Dual Power Management for Network Connectivity in Wireless Sensor Networks Yanxia Rong

    E-Print Network [OSTI]

    Choi, Hyeong-Ah

    larger than the lower power level that is used to connect the nodes in the neighborhood. Hence, the dualDual Power Management for Network Connectivity in Wireless Sensor Networks Yanxia Rong , Hongsik@vcu.edu, hchoi@gwu.edu Abstract As the energy consumption in wireless sensor nodes is dominated by the radio

  1. Telos: Enabling Ultra-Low Power Wireless Research Joseph Polastre, Robert Szewczyk, and David Culler

    E-Print Network [OSTI]

    Culler, David E.

    Telos: Enabling Ultra-Low Power Wireless Research Joseph Polastre, Robert Szewczyk, and David,szewczyk,culler}@cs.berkeley.edu Abstract-- We present Telos, an ultra low power wireless sensor module ("mote") for research and 128kB of flash), extensive sensor interfaces (8 analog lines, several digital IO Fig. 1. Telos ultra-low

  2. On Power Control for Wireless Sensor Networks: System Model, Middleware Component and Experimental Evaluation

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    On Power Control for Wireless Sensor Networks: System Model, Middleware Component and Experimental: Power Control, Wireless Sensor Networks, Networked Embedded Systems. I. INTRODUCTION The design be applied due to low signal bandwidths in the control loop, highly nonlinear and uncertain system models

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

    E-Print Network [OSTI]

    Voigt, Thiemo

    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 propose and evaluate two protocols that perform solar- aware routing. The presented simulation results

  4. Nuclear reactor power for an electrically powered orbital transfer vehicle

    SciTech Connect (OSTI)

    Jaffe, L.; Beatty, R.; Bhandari, P.; Chow, E.; Deininger, W.; Ewell, R.; Fujita, T.; Grossman, M.; Kia, T.; Nesmith, B.

    1987-01-01T23:59:59.000Z

    To help determine the systems requirements for a 300-kWe space nuclear reactor power system, a mission and spacecraft have been examined which utilize electric propulsion and this nuclear reactor power for multiple transfers of cargo between low Earth orbit (LEO) and geosynchronous Earth orbit (GEO). A propulsion system employing ion thrusters and xenon propellant was selected. Propellant and thrusters are replaced after each sortie to GEO. The mass of the Orbital Transfer Vehicle (OTV), empty and dry, is 11,000 kg; nominal propellant load is 5000 kg. The OTV operates between a circular orbit at 925 km altitude, 28.5 deg inclination, and GEO. Cargo is brought to the OTV by Shuttle and an Orbital Maneuvering Vehicle (OMV); the OTV then takes it to GEO. The OTV can also bring cargo back from GEO, for transfer by OMV to the Shuttle. OTV propellant is resupplied and the ion thrusters are replaced by the OMV before each trip to GEO. At the end of mission life, the OTV's electric propulsion is used to place it in a heliocentric orbit so that the reactor will not return to Earth. The nominal cargo capability to GEO is 6000 kg with a transit time of 120 days; 1350 kg can be transferred in 90 days, and 14,300 kg in 240 days. These capabilities can be considerably increased by using separate Shuttle launches to bring up propellant and cargo, or by changing to mercury propellant.

  5. 4178 IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 60, NO. 12, DECEMBER 2012 An Inkjet-Printed Solar-Powered Wireless Beacon

    E-Print Network [OSTI]

    Tentzeris, Manos

    --Active antennas, energy harvesting, flexible elec- tronics, harmonic balance, inkjet printing, solar antenna4178 IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 60, NO. 12, DECEMBER 2012 An Inkjet, wireless beacon, wireless energy transfer, wireless identification. I. INTRODUCTION THE combination

  6. Mobility in Wireless Sensor Networks

    E-Print Network [OSTI]

    Mehta, Ankur Mukesh

    2012-01-01T23:59:59.000Z

    Channel-Specific Wireless Sensor Network Path Data”. In:Average Power in Wireless Sensor Networks through Data Ratedesign space of wireless sensor networks”. In: IEEE Wireless

  7. A wireless, low power, asynchronous, multi-sensor, temperature network

    E-Print Network [OSTI]

    Levy, Daniel M. G. H. (Daniel Matthew Guy Ho), 1979-

    2003-01-01T23:59:59.000Z

    Wireless communication is not new. Radio and television broadcasting, as well as air traffic control have used wireless signals in their products for decades. The transmitters for these applications require large antennas ...

  8. A single sediment-Microbial Fuel Cell powering a wireless telecommunication system Yohann R. J. Thomas a

    E-Print Network [OSTI]

    1 A single sediment-Microbial Fuel Cell powering a wireless telecommunication system Yohann R. J Abstract We report the ability of a single sediment-Microbial Fuel Cell (MFC) to power wireless sensor, with no membrane or artificial catalysts. Key words: Sediment-Microbial Fuel Cell; Sensor Networks; Wireless

  9. iPower: An Energy Conservation System for Intelligent Buildings by Wireless Sensor Networks

    E-Print Network [OSTI]

    Tseng, Yu-Chee

    iPower: An Energy Conservation System for Intelligent Buildings by Wireless Sensor Networks Yu-aware capability of WSN to achieve energy conservation in intelligent buildings is an attractive direction. We therefore propose an intelligent and personalized energy-conservation system by wireless sensor networks (i

  10. Low Power Soft-Output Signal Detector Design for Wireless MIMO Communication Systems

    E-Print Network [OSTI]

    Zhang, Tong

    Low Power Soft-Output Signal Detector Design for Wireless MIMO Communication Systems Sizhong Chen-life wireless communication systems use error correcting codes (ECC) that demand soft input for decoding and Tong Zhang Electrical, Computer, and Systems Engineering Department Rensselaer Polytechnic Institute

  11. Delay Bounded Rate and Power Control in Energy Harvesting Wireless Networks

    E-Print Network [OSTI]

    Rajan, Dinesh

    in environmentally powered wireless networks with bursty packet arrivals. Varying the size of the energy storage unit such as solar energy, mechanical energy and thermal energy have started finding use in wireless sensor networks, followed by an energy storage unit. The energy harvested by the front end is stored in the storage unit

  12. Energy Balancing Routing Schemes for Low-Power Wireless Networks Eun-Sook Sung, Miodrag Potkonjak

    E-Print Network [OSTI]

    Potkonjak, Miodrag

    Energy Balancing Routing Schemes for Low-Power Wireless Networks Eun-Sook Sung, Miodrag Potkonjak}@cs.ucla.edu Abstract-- We address the problem of energy balancing in multi-hop wireless networks to optimize results show, firstly, that both schemes achieve significant improvement of energy balancing proportional

  13. A Case for Variable-Range Transmission Power Control in Wireless Multihop Networks

    E-Print Network [OSTI]

    Gomez-Castellanos, Javier

    A Case for Variable-Range Transmission Power Control in Wireless Multihop Networks Javier Gomez Department of Electrical Engineering National Autonomous University of Mexico Ciudad Universitaria, C radios and protocols for wireless ad hoc networks are primarily based on common-range transmission

  14. A Simulation Comp&son of Distributed Power Control Algorithms for Wireless Communications

    E-Print Network [OSTI]

    Chronopoulos, Anthony T.

    A Simulation Comp&son of Distributed Power Control Algorithms for Wireless Communications is the power control in the mobile terminals, which is a measure of energy efficiency. Controlling the power beiween self interested usersand predicting their choice of strategies was recently used for power control

  15. Global Optimal Routing, Scheduling and Power Control for Multi-hop Wireless Networks with

    E-Print Network [OSTI]

    Tabatabaee, Vahid

    Global Optimal Routing, Scheduling and Power Control for Multi-hop Wireless Networks scheduling and power control that minimizes the total average transmission power is found. We formulate the optimal routing scheduling and power control. Simulation results show that this methodology is more

  16. Design and Analysis of Micro-Solar Power Systems for Wireless Sensor Networks

    E-Print Network [OSTI]

    Culler, David E.

    design guidelines for micro-solar power systems. Keywords-- Micro-Solar Power Systems, Solar Energy Har of the four components of a micro- solar power system models various design choices. Based on this modelDesign and Analysis of Micro-Solar Power Systems for Wireless Sensor Networks Jaein Jeong, Xiaofan

  17. Battery-free Wireless Sensor Network For Advanced Fossil-Fuel Based Power Generation

    SciTech Connect (OSTI)

    Yi Jia

    2011-02-28T23:59:59.000Z

    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.

  18. Modeling and design of compact microwave components and systems for wireless communications and power transmission

    E-Print Network [OSTI]

    Zepeda, Paola

    2004-09-30T23:59:59.000Z

    The contribution of the work here presented involves three main topics: Wireless Power Transmission (WPT) technology, phased array systems, and microwave components design and modeling. The first topic presents the conceptual design of a WPT system...

  19. Characterization of Asymmetry in Low-Power Wireless Links: An Empirical Study

    E-Print Network [OSTI]

    New South Wales, University of

    Characterization of Asymmetry in Low-Power Wireless Links: An Empirical Study Prasant Misra Nadeem Ahmed Sanjay Jha University of New South Wales, Australia {pkmisra and Engineering The University of New South Wales Sydney 2052, Australia #12;Abstract Experimental studies

  20. EPIC-RoofNet: An Experimental Testbed for Solar-powered Wireless Sensor Networks

    E-Print Network [OSTI]

    Nasipuri, Asis

    EPIC-RoofNet: An Experimental Testbed for Solar-powered Wireless Sensor Networks Amitangshu Pal experiments on solar-powered sensor nodes. Due to constraints in cost and size, the solar panels of solar energy available at such solar-powered sensor nodes can be highly unpredictable and at times

  1. Empirical Analysis of Transmission Power Control Algorithms for Wireless Sensor Networks

    E-Print Network [OSTI]

    Culler, David E.

    Empirical Analysis of Transmission Power Control Algorithms for Wireless Sensor Networks Jaein power control, but the experimental platforms and the workloads did not reflect the reality of WSNs. We present a dynamic transmission-power-control algorithm based on previous studies and evaluate

  2. Power Control by Kalman Filter With Error Margin for Wireless IP Networks

    E-Print Network [OSTI]

    Leung, Kin K.

    Power Control by Kalman Filter With Error Margin for Wireless IP Networks Kin K. Leung AT&T Labs, Room 4-120 100 Schulz Drive Red Bank, NJ 07701 Email: kkleung@research.att.com ABSTRACT A power-control enough due to little interference temporal correlation. In this paper, we enhance the power-control

  3. Stable Distributed Power Control with High SIR Target for Cellular Wireless Communication Systems Jiayuan Chen1

    E-Print Network [OSTI]

    Haddadi, Hamed

    Stable Distributed Power Control with High SIR Target for Cellular Wireless Communication Systems power control (DPC) and propose an improved algorithm to overcome the weakness of DPC. The DPC algorithm of DPCH is slightly slower than that of DPC in the low SIR environment. Keywords - Power control, SIR

  4. Signaling Game-based Approach to Power Control Management in Wireless Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Signaling Game-based Approach to Power Control Management in Wireless Networks Khalil Ibrahimi, we revisit the power control problem in wire- less networks by introducing a signaling game approach to player II which can be accurate or dis- torted. Player II picks up his power control strategy based

  5. Joint Power Control and Link Scheduling in Wireless Networks for Throughput Optimization

    E-Print Network [OSTI]

    Huang, Jianwei

    Joint Power Control and Link Scheduling in Wireless Networks for Throughput Optimization Liqun Fu--This paper concerns the problem of finding the minimum-length TDMA frame of a power-controlled wire- less formulate the general joint link scheduling and power control problem as an in- teger linear programming

  6. Design and Analysis of Micro-Solar Power Systems for Wireless

    E-Print Network [OSTI]

    California at Berkeley, University of

    Design and Analysis of Micro- Solar Power Systems for Wireless Sensor Networks Jaein Jeong UC in Richmond Field Station Trio Heliomote #12;3 Our Contributions · Model for micro-solar power system guideline for micro-solar power systems. #12;4 Organization · System Architecture · Model for Each Component

  7. OPTIMAL POWER/DELAY TRADE-OFFS IN WIRELESS COMMUNICATIONS SMALL DELAY ASYMPTOTICS

    E-Print Network [OSTI]

    Kuzmanovic, Aleksandar

    OPTIMAL POWER/DELAY TRADE-OFFS IN WIRELESS COMMUNICATIONS ­ SMALL DELAY ASYMPTOTICS Randall A@ece.northwestern.edu ABSTRACT In this paper we consider the optimal trade-off between av- erage transmission power and average the behavior of this trade-off in the regime of asymptotically large power and small delay. Our focus

  8. Trade-off Between Power Consumption and Delay in Wireless Packetized Systems

    E-Print Network [OSTI]

    Médard, Muriel

    #12;Trade-off Between Power Consumption and Delay in Wireless Packetized Systems by Todd P Coleman by . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Arthur C. Smith Chairman, Department Committee on Graduate Students #12;Trade-off Between Power this scheme allows trade-offs between power consumption and delay. Thesis Supervisor: Muriel M´edard Title

  9. Improved Power-Delay Trade-off in Wireless Ad Hoc Networks Using Opportunistic Routing

    E-Print Network [OSTI]

    Lee, Yong Hoon

    Improved Power-Delay Trade-off in Wireless Ad Hoc Networks Using Opportunistic Routing Won power- delay trade-off than the conventional routing while providing up to a logarithmic boost that the power can be reduced at the expense of increased delay for both scenarios, but better trade-off can

  10. A Hybrid Systems Model for Power Control in Multicell Wireless Data Networks

    E-Print Network [OSTI]

    Boyer, Edmond

    A Hybrid Systems Model for Power Control in Multicell Wireless Data Networks Tansu Alpcan 1 of other users can be modeled as interfering noise signals, the goal of power control is more precisely and Tamer Bas¸ar 1 (alpcan, tbasar)@control.csl.uiuc.edu Abstract-- We present a power control scheme based

  11. Power and Area Efficient Turbo Decoder Implementation for Mobile Wireless Systems

    E-Print Network [OSTI]

    Arslan, Tughrul

    Power and Area Efficient Turbo Decoder Implementation for Mobile Wireless Systems J. H. Han1 , A. T Abstract-- The authors present a low power and area efficient turbo soft-input soft-output (SISO) decoder. Our turbo SISO decoder is based on trace back algorithm (TBA) and saves area and power by replacing

  12. Wireless Power Transmission: An Obscure History, Possibly a Bright Future.

    E-Print Network [OSTI]

    La Rosa, Andres H.

    of living. All of these trends point to an energy demand that will grow at even a larger rate. Wireless of its own. Figure 1. Projected yearly growth in world energy consumption. (3) 2 #12;History of Wireless the use of microwaves because of the economic and energy efficiency that can be leveraged by products

  13. Energy Efficient Greedy Link Scheduling and Power Control in wireless networks

    E-Print Network [OSTI]

    Sridharan, Arun

    2012-01-01T23:59:59.000Z

    We consider the problem of joint link scheduling and power control for wireless networks with average transmission power constraints. Due to the high computational complexity of the optimal policies, we extend the class of greedy link scheduling policies to handle average power constraints. We develop a greedy link scheduling and power control scheme GECS, with provable performance guarantees. We show that the performance of our greedy scheduler can be characterized using the Local Pooling Factor (LPF) of a network graph, which has been previously used to characterize the stability of the Greedy Maximal Scheduling (GMS) policy for wireless networks. We also simulate the performance of GECS on wireless network, and compare its performance to another candidate greedy link scheduling and power control policy.

  14. appeared in IEEE CAS Low Power Workshop, August 2002 Abstract--The rapid emergence of wireless 802.11 LANs

    E-Print Network [OSTI]

    Han, Richard Y.

    networks such as Bluetooth RF and IR-based wireless sensor networks. Ideally, the transmit power can symmetry need not be assumed. Initial work on transmit power control in wireless ad hoc networks to the minimum power at which the network displays the same connectivity as that displayed at the maximum

  15. A single sediment-Microbial Fuel Cell powering a wireless telecommunication system Yohann R. J. Thomas a

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    demonstration of an MFC as a viable power supply for a meteorological buoy in an estuary. Other applications1 A single sediment-Microbial Fuel Cell powering a wireless telecommunication system Yohann R. J Abstract We report the ability of a single sediment-Microbial Fuel Cell (MFC) to power wireless sensor

  16. Adaptive and Dynamic Wireless Routers with Smart Antenna for Power Management

    E-Print Network [OSTI]

    Krishnan, S Venkata; Kumar, N Senthil

    2012-01-01T23:59:59.000Z

    In the recent evolution of wireless technologies, the power management has been a worrying factor. In order to overcome the power shortage, steps are taken to find new kind of energy harvesting methods, power attenuation reduction methods and power saving techniques. Wireless routers even though consume not much of power, battery powered devices require a lot. Omni directional antenna embedded with multiple antennae focusing the beam of radio wave signals in the direction of nodes with least transmission angle can be a solution for this problem which is called as "Smart Antenna". To reduce power maceration we are going for adaptive and dynamic transmission wherein the transmission angle of antennae is varied in accordance with the movement of nodes. Apart from saving the power considerably, it also improves the signal strength

  17. Crosslayer power control in wireless networks Anastasios Giannoulis Konstantinos P. Tsoukatos Leandros Tassiulas 1

    E-Print Network [OSTI]

    Mellor-Crummey, John

    Cross­layer power control in wireless networks Anastasios Giannoulis Konstantinos P. Tsoukatos Leandros Tassiulas 1 Abstract We introduce a power control algorithm that exploits queue length information- ponential scheduling rule steers queue length ratios to desired targets. 1 System Model Consider a CDMA

  18. An Approach to Minimal Power Routing and Scheduling in Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    's fixed power level that is used, leading to data loss. The problem that we address is primarily a routingAn Approach to Minimal Power Routing and Scheduling in Wireless Ad Hoc Networks Sugata Hazarika # Jim Kurose # Dennis Goeckel + # Department of Computer Science + Department. of Electrical Engineering

  19. PERFORMANCE OF DISTRIBUTED UTILITY-BASED POWER CONTROL FOR WIRELESS AD HOC NETWORKS

    E-Print Network [OSTI]

    Kuzmanovic, Aleksandar

    PERFORMANCE OF DISTRIBUTED UTILITY-BASED POWER CONTROL FOR WIRELESS AD HOC NETWORKS Jianwei Huang network. The users exchange prices that reflect their loss in utility due to interference. The prices are then used to determine optimal (utility maximizing) power levels for each user. We present simulation

  20. An Approach to Minimal Power Routing and Scheduling in Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    's fixed power level that is used, leading to data loss. The problem that we address is primarily a routingAn Approach to Minimal Power Routing and Scheduling in Wireless Ad Hoc Networks Sugata Hazarika Jim Kurose Dennis Goeckel Department of Computer Science Department. of Electrical Engineering University

  1. PCQoS: Power Controlled QoS in Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Gomez-Castellanos, Javier

    Department of Electrical Engineering National University of Mexico, D.F., 04510 Email: {javierg@cs.dartmouth.edu Abstract--Mobile Ad hoc networks typically use a common transmission power approach for the discoveryS differentiation to applications in wireless ad hoc networks. I. INTRODUCTION The impact of transmission power

  2. Wireless Sensor Networks Powered by Ambient Energy Harvesting (WSN-HEAP) Survey and

    E-Print Network [OSTI]

    Shihada, Basem

    Wireless Sensor Networks Powered by Ambient Energy Harvesting (WSN-HEAP) ­ Survey and Challenges networks (WSNs) research has pre- dominantly assumed the use of a portable and limited energy source, viz. batteries, to power sensors. Without energy, a sensor is essentially useless and cannot contribute

  3. An Ultra Low Power SIMD Processor for Wireless Devices , Sangwon Seo1

    E-Print Network [OSTI]

    Kambhampati, Subbarao

    An Ultra Low Power SIMD Processor for Wireless Devices Mark Woh1 , Sangwon Seo1 , Chaitali, Tempe, AZ {mwoh,swseo,mahlke,tnm}@umich.edu chaitali@asu.edu ABSTRACT This paper presents an ultra low executed. For ultra low power operation, we advocate operating the processor at near threshold volt- age

  4. Error Control Coding in Low-Power Wireless Sensor Networks: When is ECC

    E-Print Network [OSTI]

    Howard, Sheryl

    Error Control Coding in Low-Power Wireless Sensor Networks: When is ECC Energy-Efficient? Sheryl L. Interference is not considered; it would lower dCR. Analog decoders are shown to be the most energy-efficient at the decoder outweighs the transmitted power savings due to using ECC, then ECC would not be energy-efficient

  5. DESIGN AND DEVELOPMENT OF POWER-EFFICIENT WIRELESS SENSING UNITS FOR STRUCTURAL HEALTH

    E-Print Network [OSTI]

    Stanford University

    unit is designed not only for reliable communication of response measurements but also for power1 DESIGN AND DEVELOPMENT OF POWER-EFFICIENT WIRELESS SENSING UNITS FOR STRUCTURAL HEALTH MONITORING is intended to 1) collect measurement data from the sensors installed on a structure, 2) store, manage

  6. Fig. 1. Through-wall wireless power transfer system configuration.

    E-Print Network [OSTI]

    Chiao, Jung-Chih

    , wind turbines, and hydraulic sources, to indoor energy-consuming systems, such as solid-state lighting

  7. Wireless power transfer for scaled electronic biomedical implants

    E-Print Network [OSTI]

    Theilmann, Paul Thomas

    2012-01-01T23:59:59.000Z

    7.17: Normalized short circuit current of FD-SOI versusFigure 7.30: Normalized short circuit current of the FD-SOIthe photodiode whose short circuit current is measured by a

  8. Wireless power transfer for scaled electronic biomedical implants

    E-Print Network [OSTI]

    Theilmann, Paul Thomas

    2012-01-01T23:59:59.000Z

    Implantable Micro Oxygen Generator (IMOG)," BiomedicalImplantable Micro Oxygen Generator (IMOG)," Biomedical

  9. Distributed Power Control and Coding-Modulation Adaptation in Wireless Networks using Annealed Gibbs Sampling

    E-Print Network [OSTI]

    Zhou, Shan; Ying, Lei

    2011-01-01T23:59:59.000Z

    In wireless networks, the transmission rate of a link is determined by received signal strength, interference from simultaneous transmissions, and available coding-modulation schemes. Rate allocation is a key problem in wireless network design, but a very challenging problem because: (i) wireless interference is global, i.e., a transmission interferes all other simultaneous transmissions, and (ii) the rate-power relation is non-convex and non-continuous, where the discontinuity is due to limited number of coding-modulation choices in practical systems. In this paper, we propose a distributed power control and coding-modulation adaptation algorithm using annealed Gibbs sampling, which achieves throughput optimality in an arbitrary network topology. We consider a realistic Signal-to-Interference-and-Noise-Ratio (SINR) based interference model, and assume continuous power space and finite rate options (coding-modulation choices). Our algorithm first decomposes network-wide interference to local interference by p...

  10. High-Efficiency Harmonically-Terminated Rectifier for Wireless Powering Applications Michael Roberg, Erez Falkenstein and Zoya Popovic

    E-Print Network [OSTI]

    Popovic, Zoya

    High-Efficiency Harmonically-Terminated Rectifier for Wireless Powering Applications Michael Roberg of Colorado, Boulder, CO, 80309-0425 Abstract-In wireless powering, the rectifier efficiency has a large effect on overall system efficiency. This paper presents an approach to high-efficiency microwave

  11. Power-Efficient Adaptable Wireless Sensor Networks , David Evans2

    E-Print Network [OSTI]

    Evans, David

    with the unpredictable network topologies that result from sensor node scatters and to manage resources (energy the flexibility necessary for the adaptations required of wireless sensor networks without the penalties network operation. · Nodes often fail during network operation, due to depleted energy, destruction

  12. Envelope amplifier design for wireless base-station power amplifiers

    E-Print Network [OSTI]

    Hsia, Chin

    2010-01-01T23:59:59.000Z

    Measured Switcher Power Loss and Efficiency Performancea) Efficiency; (b) Power loss . . . . . . . . . . . . . . .Switcher Efficiency and Power Loss . . . . Figure 3.24: High

  13. Wireless Power Transmission An Obscure History and a Bright Future?

    E-Print Network [OSTI]

    La Rosa, Andres H.

    to the distant rectenna site over a distance of 1.6 km. The dc output was 30 kW." [2] [5] #12;Solar Power transmission. Solar Power Satellite to Earth Terminal. Desert Solar Power Farm to Civilization. Earth Terminal solution to the coming power shortage . . . Solar Power Satellites (SPS) (4) #12;Solar Power Satellites (5

  14. Self-Powered Wireless Nano-scale Sensor Networks within Chemical Reactors

    E-Print Network [OSTI]

    New South Wales, University of

    a reactor for a bottom-up control of the chemical synthesis with the ultimate goal of improvingSelf-Powered Wireless Nano-scale Sensor Networks within Chemical Reactors Eisa Zarepour1 Mahbub networks (NSNs) can be applied in many chemical applications to monitor and control the chemical process

  15. ENERGY-EFFICIENT GEOGRAPHIC ROUTING IN ENVIRONMENTALLY POWERED WIRELESS SENSOR NETWORKS

    E-Print Network [OSTI]

    Hou, Y. Thomas

    ENERGY-EFFICIENT GEOGRAPHIC ROUTING IN ENVIRONMENTALLY POWERED WIRELESS SENSOR NETWORKS Kai Zengt- efficient routing protocols are requisite for the WSN appli- cations. In this paper, we study energy-efficient efficient than the corresponding residual energy based protocols without considering the property

  16. JOINT SOURCE-CHANNEL CODING AND POWER ALLOCATION FOR ENERGY EFFICIENT WIRELESS VIDEO COMMUNICATIONS

    E-Print Network [OSTI]

    Kuzmanovic, Aleksandar

    utilization of transmission energy is a critical design consideration [5]. Besides FEC, adjustmentJOINT SOURCE-CHANNEL CODING AND POWER ALLOCATION FOR ENERGY EFFICIENT WIRELESS VIDEO COMMUNICATIONS F. Zhai, Y. Eisenberg, T. N. Pappas, R. Berry, and A. K. Katsaggelos Department of Electrical

  17. Asymptotically Optimal Power-Aware Routing for Multihop Wireless Networks with Renewable

    E-Print Network [OSTI]

    Srikant, Rayadurgam

    1 Asymptotically Optimal Power-Aware Routing for Multihop Wireless Networks with Renewable Energy the performance of multihop radio networks in the presence of energy constraints, and design routing algorithms to optimally utilize the available energy. The energy model allows vastly different energy sources

  18. Multi-hop wireless charging optimization in Low-Power Networks

    E-Print Network [OSTI]

    Boyer, Edmond

    to address the challenging problem of energy consumption in low-power networks. Based on these breakthroughs, none of these works have considered the multihop energy transmission, whose feasibility have been demonstrated recently. In such a system, a node can transmit energy wirelessly to its neighbors. In this paper

  19. ENERGY-EFFICIENT GEOGRAPHIC ROUTING IN ENVIRONMENTALLY POWERED WIRELESS SENSOR NETWORKS

    E-Print Network [OSTI]

    California at Davis, University of

    {kzeng, wjlou, kren}@wpi.edu AirSprite Technologies, Inc., Northborough, MA 01532 pmoran (regularly doubled every 18 months), battery technology has been relatively unchanged for many years. EnergyENERGY-EFFICIENT GEOGRAPHIC ROUTING IN ENVIRONMENTALLY POWERED WIRELESS SENSOR NETWORKS Kai Zeng

  20. PowerNap: An Energy Efficient MAC Layer for Random Routing in Wireless Sensor Networks

    E-Print Network [OSTI]

    Shihada, Basem

    Technologies, Inc. 1 Telcordia Dr., Piscataway, NJ sami@research.telcordia.com Murat Demirbas Dept. of ComputerPowerNap: An Energy Efficient MAC Layer for Random Routing in Wireless Sensor Networks Onur Soysal Google, Inc. 1600 Amphitheatre Pkwy., Mountain View, CA onursoysal@google.com Sami Ayyorgun Telcordia

  1. A Wireless Power Interface for Rechargeable Battery Operated Neural Recording Implants

    E-Print Network [OSTI]

    Slatton, Clint

    A Wireless Power Interface for Rechargeable Battery Operated Neural Recording Implants Pengfei Li. The battery charger employs a new control loop that relaxes comparator resolution require- ments, provides-of- charge accuracy can be obtained under worst-case conditions for a comparator offset voltage of ±5m

  2. Energy-efficient Multicasting in Wireless Networks with Fixed Node Transmission Power

    E-Print Network [OSTI]

    Varvarigo, Emmanouel "Manos"

    Energy-efficient Multicasting in Wireless Networks with Fixed Node Transmission Power Christos Computer Technology Institute, Greece manos@ceid.upatras.gr ABSTRACT In this work, we propose an energy-efficient are fixed. Our algorithm is based on the multicost approach and selects an optimal energy-efficient set

  3. CMOS RF power amplifier design approaches for wireless communications

    E-Print Network [OSTI]

    Pornpromlikit, Sataporn

    2010-01-01T23:59:59.000Z

    cas- code power amplifier,” IEEE Journal of Solid-Statestacked FET power amplifiers,” IEEE Journal of Solid-StateGSM/GPRS CMOS power amplifier,” IEEE Journal of Solid-State

  4. CMOS RF Power Amplifier Design for Wireless Communications

    E-Print Network [OSTI]

    FANG, Qiang

    2012-01-01T23:59:59.000Z

    conjugate (S22) match (solid curve) and power match (dashedSupply Linear RF Power Amplifier", IEEE J. Solid-State Circ.Fully-integrated CMOS Power Amplifiers", IEEE J. Solid-State

  5. Wireless Self-powered Visual and NDE Robotic Inspection System for Live Gas Distribution Mains

    SciTech Connect (OSTI)

    Susan Burkett; Hagen Schempf

    2006-01-31T23:59:59.000Z

    Carnegie Mellon University (CMU) under contract from Department of Energy/National Energy Technology Laboratory (DoE/NETL) and co-funding from the Northeast Gas Association (NGA), has completed the overall system design of the next-generation Explorer-II (X-II) live gas main NDE and visual inspection robot platform. The design is based on the Explorer-I prototype which was built and field-tested under a prior (also DoE- and NGA co-funded) program, and served as the validation that self-powered robots under wireless control could access and navigate live natural gas distribution mains. The X-II system design ({approx}8 ft. and 66 lbs.) was heavily based on the X-I design, yet was substantially expanded to allow the addition of NDE sensor systems (while retaining its visual inspection capability), making it a modular system, and expanding its ability to operate at pressures up to 750 psig (high-pressure and unpiggable steel-pipe distribution mains). A new electronics architecture and on-board software kernel were added to again improve system performance. A locating sonde system was integrated to allow for absolute position-referencing during inspection (coupled with external differential GPS) and emergency-locating. The power system was upgraded to utilize lithium-based battery-cells for an increase in mission-time. The system architecture now relies on a dual set of end camera-modules to house the 32-bit processors (Single-Board Computer or SBC) as well as the imaging and wireless (off-board) and CAN-based (on-board) communication hardware and software systems (as well as the sonde-coil and -electronics). The drive-module (2 ea.) are still responsible for bracing (and centering) to drive in push/pull fashion the robot train into and through the pipes and obstacles. The steering modules and their arrangement, still allow the robot to configure itself to perform any-angle (up to 90 deg) turns in any orientation (incl. vertical), and enable the live launching and recovery of the system using custom fittings and a (to be developed) launch-chamber/-tube. The battery modules are used to power the system, by providing power to the robot's bus. The support modules perform the functions of centration for the rest of the train as well as odometry pickups using incremental encoding schemes. The electronics architecture is based on a distributed (8-bit) microprocessor architecture (at least 1 in ea. module) communicating to a (one of two) 32-bit SBC, which manages all video-processing, posture and motion control as well as CAN and wireless communications. The operator controls the entire system from an off-board (laptop) controller, which is in constant wireless communication with the robot train in the pipe. The sensor modules collect data and forward it to the robot operator computer (via the CAN-wireless communications chain), who then transfers it to a dedicated NDE data-storage and post-processing computer for further (real-time or off-line) analysis. CMU has fully designed every module in terms of the mechanical, electrical and software elements (architecture only). Substantial effort has gone into pre-prototyping to uncover mechanical, electrical and software issues for critical elements of the design. Design requirements for sensor-providers were also detailed and finalized and provided to them for inclusion in their designs. CMU is expecting to start 2006 with a detailed design effort for both mechanical and electrical components, followed by procurement and fabrication efforts in late winter/spring 2006. The assembly and integration efforts will occupy all of the spring and summer of 2006. Software development will also be a major effort in 2006, and will result in porting and debugging of code on the module- and train-levels in late summer and Fall of 2006. Final pipe mock-up testing is expected in late fall and early winter 2006 with an acceptance demonstration of the robot train (with a sensor-module mock-up) planned to DoE/NGA towards the end of 2006.

  6. An Efficient Hybrid Power Control Algorithm for Capacity Improvement of CDMA-based Fixed Wireless Applications

    E-Print Network [OSTI]

    Zeeshan, Muhammad; Malik, Muhammad Yasir

    2011-01-01T23:59:59.000Z

    In Fixed Wireless Applications (FWA), the Code Division Multiple Access (CDMA) is the most promising candidate for wideband data access. The reason is the soft limit on the number of active mobile devices. Many Fixed Wireless Applications impose an upper bound on the BER performance which restricts the increase in number of mobile users. The number of active mobile users or Capacity is further reduced in Multipath Fading Environment (MFE). This paper presents an effective method of improving the capacity of CDMA based Fixed Wireless Networks by using a hybrid power control algorithm. The proposed scheme improves the capacity two times as compared to the conventional CDMA based networks. Simulation results have been presented to demonstrate the effectiveness of the proposed scheme.

  7. ccurate and low-cost sensor localization is a critical requirement for the deployment of wireless sensor networks in a wide variety of applications. Low-power wireless sensors

    E-Print Network [OSTI]

    Patwari, Neal

    sensor networks in a wide variety of applications. Low-power wireless sensors may be many hops away from) measurements in wireless sensor networks. Wideband and ultra-wideband (UWB) measurements, and RF and acoustic Dramatic advances in RF and MEMS IC design have made possible the use of large networks of wireless sensors

  8. Journal of Power Sources xxx (2005) xxxxxx POWER (power optimization for wireless energy requirements): A

    E-Print Network [OSTI]

    Sastry, Ann Marie

    2005-01-01T23:59:59.000Z

    , and lifetime in selection of appropriate battery electro- chemistries and configurations (i.e. parallel, series several power ranges (micro-, milli- and Watt); or (3) a power system designed to be housed within-charge of the batteries). Future work will be focused on continuously improving our present tool. © 2005 Elsevier B.V. All

  9. Stochastic Modeling and Power Control of Time-Varying Wireless Communication Networks

    SciTech Connect (OSTI)

    Olama, Mohammed M [ORNL; Djouadi, Seddik M [ORNL; Charalambous, Prof. Charalambos [University of Cyprus

    2014-01-01T23:59:59.000Z

    Wireless networks are characterized by nodes mobility, which makes the propagation environment time-varying and subject to fading. As a consequence, the statistical characteristics of the received signal vary continuously, giving rise to a Doppler power spectral density (DPSD) that varies from one observation instant to the next. This paper is concerned with dynamical modeling of time-varying wireless fading channels, their estimation and parameter identification, and optimal power control from received signal measurement data. The wireless channel is characterized using a stochastic state-space form and derived by approximating the time-varying DPSD of the channel. The expected maximization and Kalman filter are employed to recursively identify and estimate the channel parameters and states, respectively, from online received signal strength measured data. Moreover, we investigate a centralized optimal power control algorithm based on predictable strategies and employing the estimated channel parameters and states. The proposed models together with the estimation and power control algorithms are tested using experimental measurement data and the results are presented.

  10. In Proc. of 4th IEEE Int'l Conference on Mobile and Wireless Communications Networks, Stockholm, Sweden, Sep. 9-11, 2002 Congestion Sensitive Downlink Power Control

    E-Print Network [OSTI]

    Siris, Vasilios A.

    , Sweden, Sep. 9-11, 2002 Congestion Sensitive Downlink Power Control for Wideband CDMA Systems Vasilios A-- We present a model for efficient and robust power control in the downlink of Wideband CDMA wireless. INTRODUCTION Current power control algorithms for wireless systems in- crease the power when the interference

  11. Journal of Power Sources 159 (2006) 758780 POWER (power optimization for wireless energy requirements): A

    E-Print Network [OSTI]

    Sastry, Ann Marie

    2006-01-01T23:59:59.000Z

    , and lifetime in selection of appropriate battery electro- chemistries and configurations (i.e. parallel, series to be housed within specified spaces within the system. POWER was verified by conducting two case studies-charge of the batteries). Future work will be focused on continuously improving our present tool. © 2005 Elsevier B.V. All

  12. Experimental Measurements of the Power Consumption for Wireless Sensor Networks

    E-Print Network [OSTI]

    Alonso, Javier

    consumption. Therefore, in order to give some recommendations to de- velopers and optimize the energy spent of the energy consumption should be performed for the most common operations in a sensor node. This knowledge common operations: (i) CPU change state and (ii) data transfer radio. CPU change state. The consumption

  13. A Study of the Energy Saving and Capacity Improvement Potential of Power Control in Multi-hop Wireless Networks

    E-Print Network [OSTI]

    Hwu, Wen-mei W.

    A Study of the Energy Saving and Capacity Improvement Potential of Power Control in Multi- This study investigates the potential of using transmission power control in wireless packet networks with differing number of hops between source and destination. Here we exploit the benefits of power control

  14. 1948 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 4, NO. 4, JULY 2005 Quantifying the Power Loss When Transmit

    E-Print Network [OSTI]

    Giannakis, Georgios

    to the ideal case, we quantify the power loss due to the finite-rate constraint across the entire SNR range. Index Terms--Finite-rate feedback, multi-antenna systems, power loss, transmit beamforming. I1948 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 4, NO. 4, JULY 2005 Quantifying the Power

  15. Sparse Power Efficient Topology for Wireless Networks Xiang-Yang Li * Peng-Jun Wan * Yu Wang * Ophir Frieder

    E-Print Network [OSTI]

    in the constructed network topology is power efficient. Here a route is power eficient for unicasting if its energy. This is attractive for a single trans- We consider how to construct power eficient wireless ad mission of a node can graph, which can be constructed locally and eficiently. Firstly, we combine the Gabriel structure

  16. Energy Harvesting for Self-Powered Wireless Sensors

    E-Print Network [OSTI]

    Wardlaw, Jason

    2012-02-14T23:59:59.000Z

    transistor input referred offset voltage for 0.5?m CMOS and minimum length device. . . . . . . . . . . . . . 111 54 Low-voltage Low-power Inverter Based Comparator. . . . . . . . . . 114 55 Clock Voltage Doubler...

  17. IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 60, NO. 7, JULY 2012 2277 Low-Power Wireless Power Delivery

    E-Print Network [OSTI]

    Popovic, Zoya

    sen- sors for data gathering and transmission where running wires to power a device or changing/charging batteries is diffi- cult. Often, the data is gathered at locations that are difficult to access, that need are in each other's near fields and the power transfer is accomplished through ca- pacitive, inductive

  18. Energy harvesting and wireless energy transmission for powering SHM sensor nodes

    SciTech Connect (OSTI)

    Taylor, Stuart G [Los Alamos National Laboratory; Farinholt, Kevin M [Los Alamos National Laboratory; Park, Gyuhae [Los Alamos National Laboratory; Farrar, Charles R [Los Alamos National Laboratory

    2009-01-01T23:59:59.000Z

    In this paper, we present a feasibility study of using energy harvesting and wireless energy transmission systems to operate SHM sensor nodes. The energy harvesting approach examines the use of kinetic energy harvesters to scavenge energy from the ambient sources. Acceleration measurements were made on a bridge, and serve as the basis for a series of laboratory experiments that replicate these sources using an electromagnetic shaker. We also investigated the use of wireless energy transmission systems to operate SHM sensor nodes. The goal of this investigation is to develop SHM sensing systems which can be permanently embedded in the host structure and do not require on-board power sources. This paper summarizes considerations needed to design such systems, experimental procedures and results, and additional issues that can be used as guidelines for future investigations.

  19. Probabilistic Power Management for Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Li, Baochun

    mode to conserve energy, if they do not participate as sources or destinations of active connections of the local neighborhood within its range. Connectivity is still maintained due to the natural routing networks. Recent work has shown that, by appropri- ately powering off nodes, energy may be significantly

  20. CMOS RF power amplifier design approaches for wireless communications

    E-Print Network [OSTI]

    Pornpromlikit, Sataporn

    2010-01-01T23:59:59.000Z

    high-efficiency monolithic InGaP/GaAs HBT power amplifiersdBc @ 26 dBm AB HBT Jager 02 InGaP/GaAs -37 dBc @ 27 dBm N/A23.9 dBm AB HBT Zhang 09 InGaP/GaAs 44.5% N/A -38 dBc @ 28

  1. Microsoft PowerPoint - File Transfer-Turner

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHighand Retrievals fromprocessEstimating forcloudTomTransfer Best Practices

  2. Property:Power Transfer Method | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I GeothermalPotentialBiopowerSolidGenerationMethod Jump to: navigation, search Property Name Power Transfer

  3. Joint Routing, Scheduling And Power Control For Multihop Wireless Networks With Multiple Antennas

    E-Print Network [OSTI]

    Vangala, Harish; Sharma, Prof Vinod

    2011-01-01T23:59:59.000Z

    We consider the problem of Joint Routing, Scheduling and Power-control (JRSP) problem for multihop wireless networks (MHWN) with multiple antennas. We extend the problem and a (sub-optimal) heuristic solution method for JRSP in MHWN with single antennas. We present an iterative scheme to calculate link capacities(achievable rates) in the interference environment of the network using SINR model. We then present the algorithm for solving the JRSP problem. This completes a feasible system model for MHWN when nodes have multiple antennas. We show that the gain we achieve by using multiple antennas in the network is linear both in optimal performance as well as heuristic algorithmic performance.

  4. PREPRINT DECEMBER 1999; SUBMITTED TO IEEE TRANS. ON POWER SYSTEMS SENSITIVITY OF TRANSFER CAPABILITY MARGINS

    E-Print Network [OSTI]

    models and significantly generalizes that practice to more detailed AC power system models that in- clude: power system security, power system control, power transmission planning INTRODUCTION Transfer with a range of power system models. One conve- nient and standard practice is to use a DC power flow model

  5. Impact of Fading Wireless Channel on The Performance of Game Theoretic Power Control Algorithms for CDMA Wireless Data

    E-Print Network [OSTI]

    for CDMA Wireless Data Mohammad Hayajneh United Arab Emirates University P.O.Box 17555, Al Ain , UAE chaouki@ece.unm.edu Walid Ibrahim United Arab Emirates University P.O.Box 17555, Al Ain , UAE walidibr

  6. Vehicle Technologies Office Merit Review 2015: Technology Requirements for High Power Applications of Wireless Power Transfer

    Broader source: Energy.gov [DOE]

    Presentation given by Oak Ridge National Laboratory at 2015 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about technology...

  7. MAC layer power management schemes for efficient energy- delay tradeoffs in wireless local area networks

    E-Print Network [OSTI]

    Sarkar, Mahasweta

    2006-01-01T23:59:59.000Z

    G. De Micheli, “Energy Efficient Design of Portable WirelessSimunic, “Energy Efficient System Design and Utilization”

  8. Nonlinear State Space Model of a Hydraulic Wind Power Transfer Masoud Vaezi1

    E-Print Network [OSTI]

    Zhou, Yaoqi

    state space representation of a hydraulic wind energy transfer for a single wind turbine systemNonlinear State Space Model of a Hydraulic Wind Power Transfer Masoud Vaezi1 , Majid Deldar1 1, IUPUI. Gearless hydraulic wind power systems are considered as nonlinear models because of some discrete

  9. Wirelessly-Powered Wireless Sensor Platform T. Paing, J. Morroni, A. Dolgov, J. Shin, J. Brannan, R. Zane, Z. Popovic

    E-Print Network [OSTI]

    is then measured as a function of the DC load impedance (resistance) and the estimated conversion efficiency platform does not require battery replacements, and is intended for low- maintenance assistive technology, followed by results for the entire integrated wireless sensor. This sensor does not require battery

  10. Inkjet-Printed Nanotechnology-Enabled Zero-Power Wireless Sensor Nodes for Internet-of-Things (IoT) and

    E-Print Network [OSTI]

    Tentzeris, Manos

    Interface for Sensing/Energy Harvesting/storing Nanowire Battery Multi-mode Wireless Interface for Comm. and Energy Harvesting .... .... Wireless Interface for Comm/Sensor/Power Nanowire Energy Harvest ElectronicT) and M2M Applications Manos M. Tentzeris Professor, IEEE Fellow and Distinguished Microwave Lecturer

  11. Explorer-II: Wireless Self-Powered Visual and NDE Robotic Inspection System for Live Gas Distribution Mains

    SciTech Connect (OSTI)

    Carnegie Mellon University

    2008-09-30T23:59:59.000Z

    Carnegie Mellon University (CMU) under contract from Department of Energy/National Energy Technology Laboratory (DoE/NETL) and co-funding from the Northeast Gas Association (NGA), has completed the overall system design, field-trial and Magnetic Flux Leakage (MFL) sensor evaluation program for the next-generation Explorer-II (X-II) live gas main Non-destructive Evaluation (NDE) and visual inspection robot platform. The design is based on the Explorer-I prototype which was built and field-tested under a prior (also DoE- and NGA co-funded) program, and served as the validation that self-powered robots under wireless control could access and navigate live natural gas distribution mains. The X-II system design ({approx}8 ft. and 66 lbs.) was heavily based on the X-I design, yet was substantially expanded to allow the addition of NDE sensor systems (while retaining its visual inspection capability), making it a modular system, and expanding its ability to operate at pressures up to 750 psig (high-pressure and unpiggable steel-pipe distribution mains). A new electronics architecture and on-board software kernel were added to again improve system performance. A locating sonde system was integrated to allow for absolute position-referencing during inspection (coupled with external differential GPS) and emergency-locating. The power system was upgraded to utilize lithium-based battery-cells for an increase in mission-time. The resulting robot-train system with CAD renderings of the individual modules. The system architecture now relies on a dual set of end camera-modules to house the 32-bit processors (Single-Board Computer or SBC) as well as the imaging and wireless (off-board) and CAN-based (on-board) communication hardware and software systems (as well as the sonde-coil and -electronics). The drive-module (2 ea.) are still responsible for bracing (and centering) to drive in push/pull fashion the robot train into and through the pipes and obstacles. The steering modules and their arrangement, still allow the robot to configure itself to perform any-angle (up to 90 deg) turns in any orientation (incl. vertical), and enable the live launching and recovery of the system using custom fittings and a (to be developed) launch-chamber/-tube. The battery modules are used to power the system, by providing power to the robot's bus. The support modules perform the functions of centration for the rest of the train as well as odometry pickups using incremental encoding schemes. The electronics architecture is based on a distributed (8-bit) microprocessor architecture (at least 1 in ea. module) communicating to a (one of two) 32-bit SBC, which manages all video-processing, posture and motion control as well as CAN and wireless communications. The operator controls the entire system from an off-board (laptop) controller, which is in constant wireless communication with the robot train in the pipe. The sensor modules collect data and forward it to the robot operator computer (via the CAN-wireless communications chain), who then transfers it to a dedicated NDE data-storage and post-processing computer for further (real-time or off-line) analysis. The prototype robot system was built and tested indoors and outdoors, outfitted with a Remote-Field Eddy Current (RFEC) sensor integrated as its main NDE sensor modality. An angled launcher, allowing for live launching and retrieval, was also built to suit custom angled launch-fittings from TDW. The prototype vehicle and launcher systems are shown. The complete system, including the in-pipe robot train, launcher, integrated NDE-sensor and real-time video and control console and NDE-data collection and -processing and real-time display, were demonstrated to all sponsors prior to proceeding into final field-trials--the individual components and setting for said acceptance demonstration are shown. The launcher-tube was also used to verify that the vehicle system is capable of operating in high-pressure environments, and is safely deployable using proper evacuating/purging techniques for operation in the po

  12. IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS: SPECIAL ISSUES ON WIRELESS AD HOC NETWORKS 1 Principles and Protocols for Power Control in

    E-Print Network [OSTI]

    Kawadia, Vikas

    Principles and Protocols for Power Control in Wireless Ad Hoc Networks Vikas Kawadia and P. R. Kumar-- Transmit power control is a prototypical example of a cross-layer design problem. The transmit power level consumption. The challenge is to determine where in the architecture the power control problem

  13. Analyses of power system vulnerability and total transfer capability

    E-Print Network [OSTI]

    Yu, Xingbin

    2006-04-12T23:59:59.000Z

    limits. Both steady state and dynamic security assessments are included in the process of obtaining total transfer capability. Particularly, the effect of FACTS (Flexible AC Transmission Systems) devices on TTC is examined. FACTS devices have been shown...

  14. A (Smart) Real-time PMU-assisted Power Transfer Limitation Monitoring

    E-Print Network [OSTI]

    Stability Analysis (DSA) Energy Management System (EMS) Real-Time Network Information DiagnosticA (Smart) Real-time PMU-assisted Power Transfer Limitation Monitoring and Enhancement System) · PJM's On-line Available transfer capability monitoring system and (smart) enhancements (i.e. increase

  15. Role of pilot projects and public acceptance in developing wireless power transmission as an enabling technology for space solar power systems

    SciTech Connect (OSTI)

    Woodell, M.I. [Bivings Woodell, Inc., Washington, DC (United States)] [Bivings Woodell, Inc., Washington, DC (United States); Schupp, B.W. [Raytheon Electronic Systems, Marlborough, MA (United States)] [Raytheon Electronic Systems, Marlborough, MA (United States)

    1996-12-31T23:59:59.000Z

    In all system concepts for delivering space solar power to terrestrial power systems, wireless power transmission (WPT) is identified as a critical link in the technology chain. To realize the full potential of WPT as an enabling technology for the development of space power systems, the technology needs to (1) be demonstrated as a commercially viable, low risk technology, and (2) be shown to be acceptable to the public. If WPT`s full potential is to be realized, its initial applications must be carefully chosen and demonstrated through a series of pilot projects which will develop both the technology and its public acceptance. This paper examines the role of pilot projects and how they will play an increasingly important role in the development and acceptance of WPT as an enabling technology for space solar power systems. Recognizing that public acceptance is the ultimate determinant of the commercial success or failure of a technology, the paper then explores the role of public opinion in the commercialization process of space solar power systems utilizing WPT. A framework that begins to define the process required to realize the full commercial potential of wireless power transmission is established. 21 refs., 1 fig., 2 tabs.

  16. Accepted for publication in Wireless Networks, Special Issue on Multiuser Detection in Wireless Communications Adaptive Power Control and MMSE Interference

    E-Print Network [OSTI]

    Yates, Roy

    that the receiver structure is fixed and iteratively update the transmit powers of the users to provide them hand optimizes the receiver structure with the assumption that the users have fixed transmitter powers communication systems, iterative power control is used to provide each user with an acceptable level

  17. Using Wireless Power Meters to Measure Energy Use of Miscellaneous and Electronic Devices in Buildings

    SciTech Connect (OSTI)

    UC Berkeley, Berkeley, CA USA; Brown, Richard; Lanzisera, Steven; Cheung, Hoi Ying (Iris); Lai, Judy; Jiang, Xiaofan; Dawson-Haggerty, Stephen; Taneja, Jay; Ortiz, Jorge; Culler, David

    2011-05-24T23:59:59.000Z

    Miscellaneous and electronic devices consume about one-third of the primary energy used in U.S. buildings, and their energy use is increasing faster than other end-uses. Despite the success of policies, such as Energy Star, that promote more efficient miscellaneous and electronic products, much remains to be done to address the energy use of these devices if we are to achieve our energy and carbon reduction goals. Developing efficiency strategies for these products depends on better data about their actual usage, but very few studies have collected field data on the long-term energy used by a large sample of devices due to the difficulty and expense of collecting device-level energy data. This paper describes the development of an improved method for collecting device-level energy and power data using small, relatively inexpensive wireless power meters. These meters form a mesh network based on Internet standard protocols and can form networks of hundreds of metering points in a single building. Because the meters are relatively inexpensive and do not require manual data downloading, they can be left in the field for months or years to collect long time-series energy use data. In addition to the metering technology, we also describe a field protocol used to collect comprehensive, robust data on the miscellaneous and electronic devices in a building. The paper presents sample results from several case study buildings, in which all the plug-in devices for several homes were metered, and a representative sample of several hundred plug-in devices in a commercial office building were metered for several months.

  18. Maximum Power Transfer Tracking in a Solar USB Charger for Smartphones

    E-Print Network [OSTI]

    Pedram, Massoud

    chargers do not perform the maximum power point tracking [2], [3] of the solar panel. We excludeMaximum Power Transfer Tracking in a Solar USB Charger for Smartphones Abstract--Battery life poor capacity utilization during solar energy harvesting. In this paper, we propose and demonstrate

  19. Technical Challenges of Computing Available Transfer Capability (ATC) in Electric Power Systems

    E-Print Network [OSTI]

    Technical Challenges of Computing Available Transfer Capability (ATC) in Electric Power Systems-Champaign Urbana, IL sauer@ece.uiuc.edu Abstract A key concept in the restructuring of the electric power industry limitation (either MW, MVA, or SIL). As such, ATC for a given transmission line at a given time could

  20. Off-resonance frequency operation for power transfer in a loosely coupled air core transformer

    DOE Patents [OSTI]

    Scudiere, Matthew B

    2012-11-13T23:59:59.000Z

    A power transmission system includes a loosely coupled air core transformer having a resonance frequency determined by a product of inductance and capacitance of a primary circuit including a primary coil. A secondary circuit is configured to have a substantially same product of inductance and capacitance. A back EMF generating device (e.g., a battery), which generates a back EMF with power transfer, is attached to the secondary circuit. Once the load power of the back EMF generating device exceeds a certain threshold level, which depends on the system parameters, the power transfer can be achieved at higher transfer efficiency if performed at an operating frequency less than the resonance frequency, which can be from 50% to 95% of the resonance frequency.

  1. Enhanced surfaces lead to increased heat transfer and power density.

    E-Print Network [OSTI]

    electric vehicles (HEVs) and electric vehicles (EVs) to con- vert DC battery power into a form that can IHTC-14, Washington, DC, USA. Moreno, G., 2010,"Characterization and Development of Advanced Heat

  2. Lower power RF transceiver modeling and design for wireless microsensor networks

    E-Print Network [OSTI]

    Wang, Andrew Yu, 1976-

    2005-01-01T23:59:59.000Z

    The design of wireless microsensor systems has gained increasing importance for a variety of civil and military applications. With the objective of providing short-range connectivity with significant fault tolerance, these ...

  3. Minimum Energy Transmission Over a Wireless Channel With Deadline and Power Constraints

    E-Print Network [OSTI]

    Zafer, Murtaza

    We consider optimal rate-control for energy-efficient transmission of data, over a time-varying channel, with packet-deadline constraints. Specifically, the problem scenario consists of a wireless transmitter with B units ...

  4. A Compact, Wireless, Self-Powered Pushbutton Joseph A. Paradiso and Mark Feldmeier

    E-Print Network [OSTI]

    worked in this way. The Zenith "Space Command"[1], introduced for televisions in 1956, housed 4 aluminum their utility in many scenarios. Wireless RF controllers, such as automotive keyless entry buttons, avoid

  5. Null power reallocation for data rate improvement in a wireless multicarrier system

    E-Print Network [OSTI]

    Wu, Yun

    2008-01-01T23:59:59.000Z

    Multicarrier systems are advantageous for high data rate transmissions in wireless environments due to their ease of implementation and tolerance for multipath delay spread. Currently, these systems as specified by the ...

  6. 34 IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 17, NO. 1, FEBRUARY 2002 Sensitivity of Transfer Capability Margins

    E-Print Network [OSTI]

    Dobson, Ian

    generalizes that practice to more detailed ac power system models that include voltage and re- active power--Optimization, power system control, power system security, power transmission planning, sensitivity. I. INTRODUCTION34 IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 17, NO. 1, FEBRUARY 2002 Sensitivity of Transfer

  7. 684 IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 16, NO. 12, DECEMBER 2006 A 20 dBm Linear RF Power Amplifier Using

    E-Print Network [OSTI]

    Asbeck, Peter M.

    that the impedance transformation ratio from 50 becomes too high for output powers beyond 100 mW. The resulting power/high voltage PAs were presented using directly stacked FETs without transformers in [6684 IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 16, NO. 12, DECEMBER 2006 A 20 dBm Linear

  8. Analyses of power system vulnerability and total transfer capability 

    E-Print Network [OSTI]

    Yu, Xingbin

    2006-04-12T23:59:59.000Z

    the integrated reliability performance with consideration of protection system failures. According to these indices, we can locate the weakest point or link in a power system. The whole analysis procedure is based on a non-sequential Monte Carlo simulation method...

  9. Video transmission over wireless networks 

    E-Print Network [OSTI]

    Zhao, Shengjie

    2005-08-29T23:59:59.000Z

    Compressed video bitstream transmissions over wireless networks are addressed in this work. We first consider error control and power allocation for transmitting wireless video over CDMA networks in conjunction with multiuser detection. We map a...

  10. Energy efficiency in wireless networks

    E-Print Network [OSTI]

    Jung, Eun-Sun

    2005-11-01T23:59:59.000Z

    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...

  11. Video transmission over wireless networks

    E-Print Network [OSTI]

    Zhao, Shengjie

    2005-08-29T23:59:59.000Z

    Compressed video bitstream transmissions over wireless networks are addressed in this work. We first consider error control and power allocation for transmitting wireless video over CDMA networks in conjunction with multiuser detection. We map a...

  12. Energy efficiency in wireless networks 

    E-Print Network [OSTI]

    Jung, Eun-Sun

    2005-11-01T23:59:59.000Z

    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 ...

  13. High thermal power density heat transfer apparatus providing electrical isolation at high temperature using heat pipes

    SciTech Connect (OSTI)

    Morris, J. F.

    1985-03-19T23:59:59.000Z

    This invention is directed to transferring heat from an extremely high temperature source to an electrically isolated lower temperature receiver. The invention is particularly concerned with supplying thermal power to a thermionic converter from a nuclear reactor with electric isolation. Heat from a high temperature heat pipe is transferred through a vacuum or a gap filled with electrically nonconducting gas to a cooler heat pipe. The heat pipe is used to cool the nuclear reactor while the heat pipe is connected thermally and electrically to a thermionic converter. If the receiver requires greater thermal power density, geometries are used with larger heat pipe areas for transmitting and receiving energy than the area for conducting the heat to the thermionic converter. In this way the heat pipe capability for increasing thermal power densities compensates for the comparatively low thermal power densities through the electrically nonconducting gap between the two heat pipes.

  14. Magnet power supply control of the NSLS VUV and x-ray storage rings transfer lines

    SciTech Connect (OSTI)

    Klein, J.D.; Ramamoorthy, S.; Singh, O.; Smith, J.D.

    1985-01-01T23:59:59.000Z

    The transfer lines for NSLS VUV and x-ray storage rings have been split. New power supplies have been incorporated with existing ones. The existing microprocessor system has been upgraded in order to control the additional functions. This system expands the input/output port of the microprocessor to an addressable serial/parallel link to each magnet power supply. The implementation of this system will be discussed.

  15. 156 IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 14, NO. 4, APRIL 2004 An Ultra-Low Power InAs/AlSb HEMT Ka-Band

    E-Print Network [OSTI]

    Rodwell, Mark J. W.

    156 IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 14, NO. 4, APRIL 2004 An Ultra-Low Power dc power dissipation of the ABCS LNA was an ultra-low 1.5 mW per stage, or 4.5 mW total. This is less amplifier, mil- limeter-waves. I. INTRODUCTION ULTRA-LOW power millimeter-wave low-noise am- plifiers (LP

  16. Optimal Power Management in Wireless Control Systems Konstantinos Gatsis, Alejandro Ribeiro and George J. Pappas

    E-Print Network [OSTI]

    Pappas, George J.

    using approximate dynamic programming and its behavior is validated in simulations and contrasted and George J. Pappas Abstract-- This paper considers the control of a linear plant when a sensor transmits plant state information over a wireless fading channel to a controller physically separated from

  17. Embedded packet video transmission over wireless channels using power control and forward error

    E-Print Network [OSTI]

    Granelli, Fabrizio

    for implementing packet prioritization based on a non-uniform allocation of the available transmission energy high percentage of transmission errors in the wireless medium and the limited energy of portable energy distribution is jointly employed with error correction schemes in order to achieve optimal non

  18. American Institute of Aeronautics and Astronautics Smart Power Management for an Onboard Wireless Sensors

    E-Print Network [OSTI]

    Kuzmanov, Georgi

    Sensors and Actuators Network R. Amini* , G. Gaydadjiev and E. Gill Delft University of Technology, Delft determination and control sensors and actuators. Still, providing energy efficient data collection is of paramount importance to such an onboard wireless sensors and actuators network (OWSAN). This paper proposes

  19. Power-aware Routing in Wireless Packet Networks Javier Gomez, Andrew T. Campbell

    E-Print Network [OSTI]

    Gomez-Castellanos, Javier

    and energy consumption. Introduction Communication networks comprised of personal devices in close proximity will allow personal devices in a PAN to com- municate with each other via wireless links. A key.J. Watson Research Center Hawthorne, NY 10953, USA Abstract A key characteristic of Personal Area Networks

  20. Power Transfer Potential to the Southeast in Response to a Renewable Portfolio Standard: Interim Report 1

    SciTech Connect (OSTI)

    Hadley, Stanton W [ORNL; Key, Thomas S [Electric Power Research Institute (EPRI)

    2009-03-01T23:59:59.000Z

    The power transfer potential for bringing renewable energy into the Southeast in response to a renewable portfolio standard (RPS) will depend not only on available transmission capacity but also on electricity supply and demand factors. This interim report examines how the commonly used EIA NEMS and EPRI NESSIE energy equilibrium models are considering such power transfers. Using regional estimates of capacity expansion and demand, a base case for 2008, 2020 and 2030 are compared relative to generation mix, renewable deployments, planned power transfers, and meeting RPS goals. The needed amounts of regional renewable energy to comply with possible RPS levels are compared to inter-regional transmission capacities to establish a baseline available for import into the Southeast and other regions. Gaps in the renewable generation available to meet RPS requirements are calculated. The initial finding is that the physical capability for transferring renewable energy into the SE is only about 10% of what would be required to meet a 20% RPS. Issues that need to be addressed in future tasks with respect to modeling are the current limitations for expanding renewable capacity and generation in one region to meet the demand in another and the details on transmission corridors required to deliver the power.

  1. Feedback, power control, and beamforming : methods for situational aware wireless networks

    E-Print Network [OSTI]

    Huang, Yichao

    2012-01-01T23:59:59.000Z

    Beamforming and Power Control . . . . . . . 5.4.1 ProblemInformation capacity and power control in single-cellscheduling and discrete power control,” IEEE J. Sel. Areas

  2. Powering mm-Size Wireless Implants for Brain-Machine Interfaces

    E-Print Network [OSTI]

    Mark, Michael

    2011-01-01T23:59:59.000Z

    be another way of trading input power for rectificationbe chosen, trading off available power for a more efficientTrading-off channel loss for increased transmit power as

  3. Vehicle Technologies Office Merit Review 2014: Advanced Wireless Power Transfer and Infrastructure Analysis

    Broader source: Energy.gov [DOE]

    Presentation given by National Renewable Energy Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about advanced...

  4. Cross-layer design optimizations in wireless protocol stacks

    E-Print Network [OSTI]

    Iyer, Sridhar

    of memory, processing power, battery life and the variations in the wireless network. The variations

  5. CoolSpots: Reducing the Power Consumption of Wireless Mobile Devices with Multiple Radio Interfaces

    E-Print Network [OSTI]

    Gupta, Rajesh

    Lifetime (Hours,1300mAHbattery) Comm Power System Power Battery Lifetime Permission to make digital or hard copies

  6. A resonant load circuit to develop electrical power transfer of thermionic converters

    SciTech Connect (OSTI)

    Perez, G.; Estrada, C.A.; Jimenez, A.E.

    1998-07-01T23:59:59.000Z

    Low internal impedance of thermionic converters requires a low impedance load in the DC mode to obtain optimal power transfer. An internal resistance near 0.1 W for thermionic converters is common. According to the maximum power theorem [Desoer,1969], a similar magnitude for the resistance load must be fixed. Due to temperature changes, the internal plasma resistance and the resistance of the leads is modified [Houston,1959], for this reason, it is difficult to maintain maximum power transfer to the load. This paper presents a resonant load circuit for thermionic converters in the AC mode, to develop impedance coupling. The circuit employs an electrical transformer and positive feedback; by this way, oscillations are themselves maintained. It is used an electrical circuit model [Perez et al, 1997], to simulate the electrical behavior of the thermionic converter.

  7. Adaptive Transmit Power Control in IEEE 802.11aWirelessLANs Daji Qiao+ Sunghyun Choi' Amit Jainf Kang G. Shin+

    E-Print Network [OSTI]

    Qiao, Daji

    recognized asone of the effectiveways to save energy in wireless devices. In this paper, we demonstrate exchange before each data transmission, and then selectthe most energy-efficientcombination of the PHY mode and the transmit power level far the subsequentdata frametransmission to save energy. The performance

  8. 100kW Energy Transfer Multiplexer Power Converter Prototype Development Project

    SciTech Connect (OSTI)

    S. Merrill Skeist; Richard H. (Dick) Baker; Anthony G.P. Marini; DOE Project Officer - Keith Bennett

    2006-03-21T23:59:59.000Z

    Project Final Report for "100kW Energy Transfer Multiplexer Power Converter Prototype Development Project" prepared under DOE grant number DE-FG36-03GO13138. This project relates to the further development and prototype construction/evaluation for the Energy Transfer Multiplexer (ETM) power converter topology concept. The ETM uses a series resonant link to transfer energy from any phase of a multiphase input to any phase of a multiphase output, converting any input voltage and frequency to any output voltage and frequency. The basic form of the ETM converter consists of an eight (8)-switch matrix (six phase power switches and two ground power switches) and a series L-C resonant circuit. Electronic control of the switches allows energy to be transferred in the proper amount from any phase to any other phase. Depending upon the final circuit application, the switches may be either SCRs or IGBTs. The inherent characteristics of the ETM converter include the following: Power processing in either direction (bidirectional); Large voltage gain without the need of low frequency magnetics; High efficiency independent of output load and frequency; Wide bandwidth with fast transient response and; Operation as a current source. The ETM is able to synthesize true sinusoidal waveforms with low harmonic distortions. For a low power PM wind generation system, the ETM has the following characteristics and advantages: It provides voltage gain without the need of low frequency magnetics (DC inductors) and; It has constant high efficiency independent of the load. The ETM converter can be implemented into a PM wind power system with smaller size, reduced weight and lower cost. As a result of our analyses, the ETM offers wind power generation technology for the reduction of the cost and size as well as the increase in performance of low power, low wind speed power generation. This project is the further theoretical/analytical exploration of the ETM converter concept in relationship to PM wind power generator applications in the 100kW and under power range. The theoretical/analytical and bench scale work focuses on simplifying the basic ETM converter topology (in terms of parts count and complexity) for the specific application of the low power PM system. The project goals and objectives were for Spellman HV will develop a 100kW prototype ETM power converter based on paralleled lower ratings converters. The proposed configuration of this prototype is a 100kW rated converter comprised of four (4) 34kW rated modules connected in parallel (the fourth converter is included to demonstrate N+1 fault tolerance). This approach is more viable as there is lower technological risk involved in developing a 34kW-rated converter than a single 100kW unit. The modular system approach should have a lower deployment and service cost over a single unit system, because of the economics of scale (smaller units at a higher volume means lower manufacturing cost) and because of improved serviceability (a non-redundant power system with one failed module will still operate at a lower power level). There is also the added benefit that greater commercial application and acceptance should be achieved by having a modular system available in which fault tolerance (N+1 or 2N) is a feature. This modular approach would allow the output power to be increased by adding more paralleled converters. Thus, the maximum output power of the overall power system is a function of the interconnection medium (the hot swap connection subsystem), rather than the ratings of a single module. The project was implemented with Spellman HV acting as the program management and production assembly and test facility; The Baker Company acting as a technical consultant and resource when required; and dtm Associates acting as the design/development resource for the hardware development of the 100kW ETM converter prototype.

  9. High efficiency wideband envelope tracking power amplifier for next-generation wireless communications

    E-Print Network [OSTI]

    Kwak, Myoungbo

    2011-01-01T23:59:59.000Z

    Simulated linear stage main power loss comparison with anSimulation of the total power loss in the switch-FETs as aSimulation of the power loss in the driver, as a function of

  10. Numerical Verification of the Power Transfer and Wakefield Coupling in the CLIC Two-Beam Accelerator

    E-Print Network [OSTI]

    Candel, Arno; NG, C; Rawat, V; Schussman, G; Ko, K; Syratchev, I; Grudiev, A; Wuensch, W

    2011-01-01T23:59:59.000Z

    The Compact Linear Collider (CLIC) provides a path to a multi-TeV accelerator to explore the energy frontier of High Energy Physics. Its two-beam accelerator (TBA) concept envisions complex 3D structures, which must be modeled to high accuracy so that simulation results can be directly used to prepare CAD drawings for machining. The required simulations include not only the fundamental mode properties of the accelerating structures but also the Power Extraction and Transfer Structure (PETS), as well as the coupling between the two systems. Time-domain simulations will be performed to understand pulse formation, wakefield damping, fundamental power transfer and wakefield coupling in these structures. Applying SLAC’s parallel finite element code suite, these large-scale problems will be solved on some of the largest supercomputers available. The results will help to identify potential issues and provide new insights on the design, leading to further improvements on the novel two-beam accelerator scheme.

  11. ITERATIVE POWER CONTROL FOR MULTIMEDIA WIRELESS COMMUNICATIONS Onur Sahin, Elza Erkip, and David Goodman

    E-Print Network [OSTI]

    Erkip, Elza

    , such as channel conditions, required end-to-end distortion, etc. and finds the optimal operating powers of all power control algorithm and prove con- vergence. The simulations for Gauss-Markov source with transform consumes power comparable to transmission power, which necessities joint optimization of source encoder

  12. IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, ACCEPTED FOR PUBLICATION 1 An Auction Approach to Distributed Power

    E-Print Network [OSTI]

    Tao, Meixia "Melissa"

    much power to reserve for its own transmission, how much power to purchase from other users, and how to Distributed Power Allocation for Multiuser Cooperative Networks Yuan Liu, Student Member, IEEE, Meixia Tao goal is to design an optimal distributed power allocation algorithm that enables user cooperation

  13. MHP: Master-Handoff Protocol for Fast and Energy-Efficient Data Transfer over SPI in Wireless Sensing Systems

    E-Print Network [OSTI]

    Yoo, Seung-mok

    2012-01-01T23:59:59.000Z

    the measured energy consumptions during one data transfertransmission, and energy consumption for the data transferand the energy consumption depends on the data transfer

  14. Transmission Power Measurements for Wireless Sensor Nodes and their Relationship to the Battery Level

    E-Print Network [OSTI]

    Rossi, Michele

    /or po- tentiometer settings translate to actual transmitted power levels is crucial to e.g. design correct power control algorithms, which can effectively operate under any operational condition very intense under all aspects ranging from routing to MAC (Medium Access Control) [2] [3] and power

  15. SelfTuning Wireless Network Power Management MANISH ANAND, EDMUND B. NIGHTINGALE, and JASON FLINN

    E-Print Network [OSTI]

    Flinn, Jason

    ­client applica­ tions. Compared to default 802.11b power management, STPM reduces the total energy usage of an i network power management of­ ten substantially degrades performance and may even increase overall energy usage when used with latency­sensitive applica­ tions. We propose self­tuning power management (STPM

  16. WIRELESS HELIOSTAT AND CONTROL SYSTEM FOR LARGE SELF-POWERED HELIOSTAT FIELDS

    E-Print Network [OSTI]

    Turau, Volker

    Nodes, are deployed in the DLR Solar Tower Demonstration Plant heliostat field, controlled by a base station located individual heliostats, represent about 40% of the investment into the solar power plant. Furthermore, commercial solar power plants utilize dedicated wired links and bus systems to power and control heliostats

  17. Downflow heat transfer in a heated ribbed vertical annulus with a cosine power profile

    SciTech Connect (OSTI)

    Anderson, J.L.; Condie, K.G.; Larson, T.K.

    1991-10-01T23:59:59.000Z

    Experiments designed to investigate downflow heat transfer in a heated, ribbed annulus test section simulating one of the annular coolant channels of a Savannah River Plant production reactor Mark 22 fuel assembly have been conducted at the Idaho National Engineering Laboratory. The inner surface of the annulus was constructed of aluminum and was electrically heated to provide an axial cosine power profile and a flat azimuthal power shape. Data presented in this report are from the ECS-2c series, which was a follow on series to the ECS-2b series, conducted specifically to provide additional data on the effect of different powers at the same test conditions, for use in evaluation of possible power effects on the aluminum temperature measurements. Electrical powers at 90%, 100%, and 110% of the power required to result in the maximum aluminum temperature at fluid saturation temperature were used at each set of test conditions previously used in the ECS-2b series. The ECS-2b series was conducted in the same test rig as the previous ECS-2b series. Data and experimental description for the ECS-2b series is provided in a previous report. 18 refs., 25 figs., 3 tabs.

  18. Power Transfer Potential to the Southeast in Response to a Renewable Portfolio Standard: Final Report

    SciTech Connect (OSTI)

    Key, Thomas S [Electric Power Research Institute (EPRI); Hadley, Stanton W [ORNL; Deb, Rajat [LCG Consulting

    2010-02-01T23:59:59.000Z

    Electricity consumption in the Southeastern US, including Florida, is approximately 32% of the total US. The availability of renewable resources for electricity production is relatively small compared to the high consumption. Therefore meeting a national renewable portfolio standard (RPS) is particularly challenging in this region. Neighboring regions, particularly to the west, have significant wind resources and given sufficient transmission these resources could serve energy markets in the SE. This report looks at renewable resource supply relative to demands and the potential for power transfer into the SE. We found that significant wind energy transfers, at the level of 30-60 GW, are expected to be economic in case of federal RPC or CO2 policy. Development of wind resources will depend not only on the available transmission capacity and required balancing resources, but also on electricity supply and demand factors.

  19. Challenges on Low-Power Platform Design for Real-World Wireless Sensing Applications

    E-Print Network [OSTI]

    Chou, Pai H.

    side, we discuss techniques that enhance the efficiency of different types of power supplies, including batteries, solar panels, and energy storage. The platform as a whole will operate even more efficiently of data, and character- istics of power supply, the platform may need to incorporate different features

  20. SelfTuning Wireless Network Power Management Manish Anand, Edmund B. Nightingale, and Jason Flinn

    E-Print Network [OSTI]

    Flinn, Jason

    interface, and the energy usage of the platform. We have implemented STPM as a Linux kernel module­client applications. Compared to default 802.11b power management, STPM reduces the total energy usage of an i network power management often substan­ tially degrades performance and may even increase over­ all energy

  1. Self-Tuning Wireless Network Power Management MANISH ANAND, EDMUND B. NIGHTINGALE, and JASON FLINN

    E-Print Network [OSTI]

    Flinn, Jason

    -client applica- tions. Compared to default 802.11b power management, STPM reduces the total energy usage of an i, streaming audio, and thin-client re- mote X displays. For instance, STPM reduces the total energy usage network power management of- ten substantially degrades performance and may even increase overall energy

  2. Self-Tuning Wireless Network Power Management Manish Anand, Edmund B. Nightingale, and Jason Flinn

    E-Print Network [OSTI]

    Flinn, Jason

    interface, and the energy usage of the platform. We have implemented STPM as a Linux kernel module-client applications. Compared to default 802.11b power management, STPM reduces the total energy usage of an i network power management often substan- tially degrades performance and may even increase over- all energy

  3. Analysis of Power-Aware Buffering Schemes in Wireless Sensor Networks

    E-Print Network [OSTI]

    Chen, Shigang

    problem in battery-powered sensor networks, focusing on the fixed-size and fixed-interval buffering parameters of radio module and memory bank, data arrival rate, and data-size variation, thereby providing operational requirement of battery-powered sensor networks [

  4. Power Transfer Potential to the Southeast in Response to a Renewable Portfolio Standard: Interim Report 2

    SciTech Connect (OSTI)

    Hadley, Stanton W [ORNL; Key, Thomas S [Electric Power Research Institute (EPRI); Deb, Rajat [LCG Consulting

    2009-05-01T23:59:59.000Z

    Electricity consumption in the Southeastern US, not including Florida, is approximately 24% of the total US. The availability of renewable resources for electricity production is relatively small compared to the high consumption. Therefore meeting a national renewable portfolio standard (RPS) is particularly challenging in this region. Neighboring regions, particularly to the west, have significant wind resources and given sufficient long distant transmission these resources could serve energy markets in the SE. This report looks at renewable resource supply relative to demands and the potential for power transfer into the SE. It shows that development of wind resources will depend not only on available transmission capacity but also on electricity supply and demand factors.

  5. Efficient network camouflaging in wireless networks 

    E-Print Network [OSTI]

    Jiang, Shu

    2006-04-12T23:59:59.000Z

    when protected networks are wireless networks, such as sensor networks and mobile ad hoc networks. The reason is that wireless networks are typically subject to resource constraints (e.g. bandwidth, power supply) and possess some unique characteristics...

  6. Some Implications of Low Power Wireless to IP Networking Kannan Srinivasan, Prabal Dutta, Arsalan Tavakoli, and Philip Levis

    E-Print Network [OSTI]

    Levis, Philip

    down, networks have expanded to in- clude large numbers of wireless desktops, laptops, palmtops conserve energy. Wireless sensor networks (sensornets) are one heavily studied subclass of PANs [8 for many different networks and usage patterns, working well, or at least well enough, in many domains

  7. A systems engineering approach to the analysis of Wireless Power Transmission Systems

    E-Print Network [OSTI]

    Brown, Alan Madden

    1993-01-01T23:59:59.000Z

    , the Soviet Union was given credit for fundmg a large development program, with a Solar Power Satellite (SPS) being the eventual goal A 1987 London Times Article presented evidence of such a program, with quotes from Soviet officials indicating... detailed feasibility studies of Solar Power Satellites and other apphcations of WPT technology [(61. The United States has several programs under consideration, although few are being funded at levels needed for technology development A terrestrial...

  8. A Self-powered Wireless Sensor Node for Structural Health , Dong Sam Haa

    E-Print Network [OSTI]

    Ha, Dong S.

    (heat, solar, wind, vibration, radio frequency radiation) provides possible means to recharge to harvest vibration energy using a piezoelectric cantilever. The circuit generates a regulated DC output node consumes only 0.3 J and is powered up by the energy harvested from vibrations, often available

  9. Wireless Networks 6 (2000) 263277 263 Application-driven power management for mobile communication

    E-Print Network [OSTI]

    Han, Richard Y.

    2000-01-01T23:59:59.000Z

    consumed by the communication. For a high-end laptop, this can translate to 6­9% savings in the energy to be properly managed to conserve energy. In this paper, we present the design and implementation of an innovative transport level protocol capable of significantly reducing the power usage of the communication

  10. On the Network Lifetime of Wireless Sensor Networks Under Optimal Power Control

    E-Print Network [OSTI]

    Nasipuri, Asis

    significantly reduces energy wastage by utilizing sleep cycles of the radio. In such networks, overhearing causes significant energy losses, especially if the network density is high. Our calculations demonstrate are powered by fixed energy resources such as a battery, and consequently, their utility is limited

  11. On Kalman Filtering with Fading Wireless Channels Governed by Power Control

    E-Print Network [OSTI]

    . In deriving the optimal power allocation laws, both statistical channel information and full channel This research was supported under Australian Research Council's Discovery Projects funding scheme (project sockets, there is a need for energy conservation. Even though energy harvesting is frequently considered

  12. A Wireless XML-Based Handheld Multimodal Digital Video Library Client System

    E-Print Network [OSTI]

    Lyu, Michael R.

    of wireless devices, including limitation of screen size, CPU processing power, battery and input devices

  13. Unmanned Aerial Vehicle (UAV) Dynamic-Tracking Directional Wireless Antennas for Low Powered Applications that Require Reliable Extended Range Operations in Time Critical Scenarios

    SciTech Connect (OSTI)

    Scott G. Bauer; Matthew O. Anderson; James R. Hanneman

    2005-10-01T23:59:59.000Z

    The proven value of DOD Unmanned Aerial Vehicles (UAVs) will ultimately transition to National and Homeland Security missions that require real-time aerial surveillance, situation awareness, force protection, and sensor placement. Public services first responders who routinely risk personal safety to assess and report a situation for emergency actions will likely be the first to benefit from these new unmanned technologies. ‘Packable’ or ‘Portable’ small class UAVs will be particularly useful to the first responder. They require the least amount of training, no fixed infrastructure, and are capable of being launched and recovered from the point of emergency. All UAVs require wireless communication technologies for real- time applications. Typically on a small UAV, a low bandwidth telemetry link is required for command and control (C2), and systems health monitoring. If the UAV is equipped with a real-time Electro-Optical or Infrared (EO/Ir) video camera payload, a dedicated high bandwidth analog/digital link is usually required for reliable high-resolution imagery. In most cases, both the wireless telemetry and real-time video links will be integrated into the UAV with unity gain omni-directional antennas. With limited on-board power and payload capacity, a small UAV will be limited with the amount of radio-frequency (RF) energy it transmits to the users. Therefore, ‘packable’ and ‘portable’ UAVs will have limited useful operational ranges for first responders. This paper will discuss the limitations of small UAV wireless communications. The discussion will present an approach of utilizing a dynamic ground based real-time tracking high gain directional antenna to provide extend range stand-off operation, potential RF channel reuse, and assured telemetry and data communications from low-powered UAV deployed wireless assets.

  14. Heat Transfer and Latent Heat Storage in Inorganic Molten Salts for Concentrating Solar Power Plants

    SciTech Connect (OSTI)

    Mathur, Anoop [Terrafore Inc.] [Terrafore Inc.

    2013-08-14T23:59:59.000Z

    A key technological issue facing the success of future Concentrating Solar Thermal Power (CSP) plants is creating an economical Thermal Energy Storage (TES) system. Current TES systems use either sensible heat in fluids such as oil, or molten salts, or use thermal stratification in a dual-media consisting of a solid and a heat-transfer fluid. However, utilizing the heat of fusion in inorganic molten salt mixtures in addition to sensible heat , as in a Phase change material (PCM)-based TES, can significantly increase the energy density of storage requiring less salt and smaller containers. A major issue that is preventing the commercial use of PCM-based TES is that it is difficult to discharge the latent heat stored in the PCM melt. This is because when heat is extracted, the melt solidifies onto the heat exchanger surface decreasing the heat transfer. Even a few millimeters of thickness of solid material on heat transfer surface results in a large drop in heat transfer due to the low thermal conductivity of solid PCM. Thus, to maintain the desired heat rate, the heat exchange area must be large which increases cost. This project demonstrated that the heat transfer coefficient can be increase ten-fold by using forced convection by pumping a hyper-eutectic salt mixture over specially coated heat exchanger tubes. However,only 15% of the latent heat is used against a goal of 40% resulting in a projected cost savings of only 17% against a goal of 30%. Based on the failure mode effect analysis and experience with pumping salt at near freezing point significant care must be used during operation which can increase the operating costs. Therefore, we conclude the savings are marginal to justify using this concept for PCM-TES over a two-tank TES. The report documents the specialty coatings, the composition and morphology of hypereutectic salt mixtures and the results from the experiment conducted with the active heat exchanger along with the lessons learnt during experimentation.

  15. A systems engineering approach to the analysis of Wireless Power Transmission Systems 

    E-Print Network [OSTI]

    Brown, Alan Madden

    1993-01-01T23:59:59.000Z

    with regard to the development of WPT technology, and the eventual deployment of a Solar Power Satellite System As mentioned earlier, researchers in Japan have been quite active in microwave technology development, and other government agencies have funded... be implemented to achieve a more robust transinitter system A phased array antenna is comprised of a large number of smaller radiators, which are controlled in such a way that each element's beam will constructively combine to produce a beam with the same...

  16. IEEE Wireless Communications and Networking Conference (WCNC), Sept. 2000 A Novel Co-existence Algorithm for Unlicensed Fixed Power Devices

    E-Print Network [OSTI]

    Peha, Jon M.

    ]. The Federal Communications Commission (FCC) has of late increased unlicensed allocations, creating1 IEEE Wireless Communications and Networking Conference (WCNC), Sept. 2000 A Novel Co the Unlicensed Personal Communication Services (UPCS) band [2], the Unlicensed National Information

  17. Phenylnaphthalene Derivatives as Heat Transfer Fluids for Concentrating Solar Power: Loop Experiments and Final Report

    SciTech Connect (OSTI)

    McFarlane, Joanna [ORNL; Bell, Jason R [ORNL; Felde, David K [ORNL; Joseph III, Robert Anthony [ORNL; Qualls, A L [ORNL; Weaver, Samuel P [ORNL

    2013-02-01T23:59:59.000Z

    ORNL and subcontractor Cool Energy completed an investigation of higher-temperature, organic thermal fluids for solar thermal applications. Although static thermal tests showed promising results for 1-phenylnaphthalene, loop testing at temperatures to 450 C showed that the material isomerized at a slow rate. In a loop with a temperature high enough to drive the isomerization, the higher melting point byproducts tended to condense onto cooler surfaces. So, as experienced in loop operation, eventually the internal channels of cooler components such as the waste heat rejection exchanger may become coated or clogged and loop performance will decrease. Thus, pure 1-phenylnaphthalene does not appear to be a fluid that would have a sufficiently long lifetime (years to decades) to be used in a loop at the increased temperatures of interest. Hence a decision was made not to test the ORNL fluid in the loop at Cool Energy Inc. Instead, Cool Energy tested and modeled power conversion from a moderate-temperature solar loop using coupled Stirling engines. Cool Energy analyzed data collected on third and fourth generation SolarHeart Stirling engines operating on a rooftop solar field with a lower temperature (Marlotherm) heat transfer fluid. The operating efficiencies of the Stirling engines were determined at multiple, typical solar conditions, based on data from actual cycle operation. Results highlighted the advantages of inherent thermal energy storage in the power conversion system.

  18. Wireless Demand Response Controls for HVAC Systems

    E-Print Network [OSTI]

    Federspiel, Clifford

    2010-01-01T23:59:59.000Z

    Response Controls for HVAC Systems Clifford Federspiel,tests. Figure 5: Specific HVAC electric power consumptioncontrol, demand response, HVAC, wireless Executive Summary

  19. 406 IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 23, NO. 8, AUGUST 2013 A Novel Frequency-Selective Power

    E-Print Network [OSTI]

    Bornemann, Jens

    406 IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 23, NO. 8, AUGUST 2013 A Novel Frequency.rosenberg@ieee.org). M. Salehi is with the Department of Electrical and Computer Engineering, University of Victoria, B. Bornemann is with the Department of Electrical and Computer Engi- neering, University of Victoria, B

  20. Power-aware communication for wireless sensor-actuator systems Konstantinos Gatsis, Miroslav Pajic, Alejandro Ribeiro, and George J. Pappas

    E-Print Network [OSTI]

    Pappas, George J.

    . We present in Section II our architecture consisting of a sensor transmitting plant-aware communication protocols for a sensor transmitting plant state measurements over a wireless Markov fading channel to the current channel fading and not the plant state. We then derive an improved protocol allowing the sensor

  1. Recent advances in the development of a self-powered wireless sensor network for structural health prognosis

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    on acoustic emission produced by corrosion on reinforced concrete and by crack propagation on steel components. Several wireless prototype nodes have been already requested for applications on offshore oil platforms, energy harvesting, structural health monitoring, diagnosis and prognosis, corrosion, crack propagation. 1

  2. Wireless Power Transmission

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem Not FoundInformation DOEInformation Summary Big*Theea DynamicWabashWhole88

  3. Microwave and millimeter-wave rectifying circuit arrays and ultra-wideband antennas for wireless power transmission and communications

    E-Print Network [OSTI]

    Ren, Yu-Jiun

    2009-05-15T23:59:59.000Z

    . .......................................................................................... 67 33. The retrodirective rectenna system...................................................................... 69 34. Geometry of the broadband ring antenna: (a) two-layer structure, (b) outer ring, (c) inner ring, and (d) dual-ring (with outer... be used to diminish the reradiated harmonics. With the demand for the high-speed data rates and high capacity, broadband and ultra-wideband (UWB) antennas have already received much attention in wireless 5 communications. With an ultra...

  4. Utility-Based Power Control for a Two-Cell CDMA Data Network

    E-Print Network [OSTI]

    Zhou, Chi; Honig, Michael L.; Jordan, Scott

    2005-01-01T23:59:59.000Z

    and N. B. Mandayam, “Power control for wireless data,” IEEE6] ——, “Ef?cient power control via pricing in wireless dataA new framework for power control in wireless data networks:

  5. X-by-wireless: a novel approach to vehicle control

    E-Print Network [OSTI]

    Hoelscher, David Louis

    2009-05-15T23:59:59.000Z

    As the cost of wireless devices approaches zero, it becomes more feasible to replace wires with wireless communication. Vehicle wiring harnesses are traditionally wired to communicate both power and information simultaneously, resulting in separate...

  6. Efficient multi-resolution data dissemination in wireless sensor networks

    E-Print Network [OSTI]

    Chen, Jian

    2005-11-01T23:59:59.000Z

    A large-scale distributed wireless sensor network is composed of a large collection of small low-power, unattended sensing devices equipped with limited memory, processors, and short-range wireless communication. The network is capable...

  7. X-by-wireless: a novel approach to vehicle control 

    E-Print Network [OSTI]

    Hoelscher, David Louis

    2009-05-15T23:59:59.000Z

    As the cost of wireless devices approaches zero, it becomes more feasible to replace wires with wireless communication. Vehicle wiring harnesses are traditionally wired to communicate both power and information simultaneously, resulting in separate...

  8. 486 IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 17, NO. 7, JULY 2007 Estimation of Roughness-Induced Power Absorption

    E-Print Network [OSTI]

    Tsang, Leung

    it to predict the roughness effect on power loss. Index Terms--Power absorption, power spectral density (PSD significant additional power loss that can be detrimental for insertion loss limited designs. We recently interconnect surfaces and use it to estimate corresponding roughness-induced power loss. The 2-D PSD

  9. Improving wireless network performance using sensor hints

    E-Print Network [OSTI]

    Sivalingam, Lenin Ravindranath

    2010-01-01T23:59:59.000Z

    Users of wireless devices often switch between being stationary and in motion while transferring data. Protocols that perform well in the static setting (where the channel conditions are relatively stable), however, tend ...

  10. 2005 International Conference on Wireless Networks, Communications and Mobile Computing Optimal Power Control for Multiple Access Channel

    E-Print Network [OSTI]

    Chen, Rong-Rong

    Power Control for Multiple Access Channel with Peak and Average Power Constraints Rong-Rong Chen}I@ece.utah.edu Abstract- In this paper, we study optimal power control for multiple access channel with peak and average and the receiver. We characterize the structures of the optimal power control policy and show that the optimal

  11. Heat Transfer and Thermophotovoltaic Power Generation in Oil-fired Heating Systems

    SciTech Connect (OSTI)

    Butcher, T.; Hammonds, J.S.; Horne, E.; Kamath, B.; Carpenter, J.; Woods, D.R.

    2010-10-21T23:59:59.000Z

    The focus of this study is the production of electric power in an oil-fired, residential heatingsystem using thermophotovoltaic (TPV) conversion devices. This work uses experimental, computational, and analytical methods to investigate thermal mechanisms that drive electric power production in the TPV systems. An objective of this work is to produce results that will lead to the development of systems that generate enough electricity such that the boiler is self-powering. An important design constraint employed in this investigation is the use of conventional, yellow-flame oil burners, integrated with a typical boiler. The power production target for the systems developed here is 100 W - the power requirement for a boiler that uses low-power auxiliary components. The important heattransfer coupling mechanisms that drive power production in the systems studied are discussed. The results of this work may lead to the development of systems that export power to the home electric system.

  12. Maximum Power Transfer Tracking for a Photovoltaic-Supercapacitor Energy System

    E-Print Network [OSTI]

    Pedram, Massoud

    that efficiency of the charger varies depending on the power output level of the energy generation source charger efficiency. More precisely, previous MPPT methods only maximize the power output of the energy the power comes from a renewable source such a solar cell (photovoltaic, or PV for short) or a windmill

  13. A study on the maximum power transfer condition in an inductively coupled plasma using transformer circuit model

    SciTech Connect (OSTI)

    Kim, Young-Do; Lee, Hyo-Chang; Chung, Chin-Wook [Department of Electrical Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791 (Korea, Republic of)] [Department of Electrical Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791 (Korea, Republic of)

    2013-09-15T23:59:59.000Z

    Correlations between the external discharge parameters (the driving frequency ? and the chamber dimension R) and plasma characteristics (the skin depth ? and the electron-neutral collision frequency ?{sub m}) are studied using the transformer circuit model [R. B. Piejak et al., Plasma Sources Sci. Technol. 1, 179 (1992)] when the absorbed power is maximized in an inductively coupled plasma. From the analysis of the transformer circuit model, the maximum power transfer conditions, which depend on the external discharge parameters and the internal plasma characteristics, were obtained. It was found that a maximum power transfer occurs when ??0.38R for the discharge condition at which ?{sub m}/??1, while it occurs when ???(2)?(?/?{sub m})R for the discharge condition at which ?{sub m}/??1. The results of this circuit analysis are consistent with the stable last inductive mode region of an inductive-to-capacitive mode transition [Lee and Chung, Phys. Plasmas 13, 063510 (2006)], which was theoretically derived from Maxwell's equations. Our results were also in agreement with the experimental results. From this work, we demonstrate that a simple circuit analysis can be applied to explain complex physical phenomena to a certain extent.

  14. Circuits and systems for efficient portable-to-portable wireless charging

    E-Print Network [OSTI]

    Jin, Rui, M. Eng. Massachusetts Institute of Technology

    2014-01-01T23:59:59.000Z

    In today's world of ever-increasing low-power portable electronics, from implants to wireless accessories, powering these devices efficiently and conveniently is an escalating issue. The proposed solution is to wirelessly ...

  15. Using Solid Particles as Heat Transfer Fluid for use in Concentrating Solar Power (CSP) Plants

    Broader source: Energy.gov [DOE]

    This presentation was delivered at the SunShot Concentrating Solar Power (CSP) Program Review 2013, held April 23–25, 2013 near Phoenix, Arizona.

  16. A Directionality based Location Discovery Scheme for Wireless Sensor Networks

    E-Print Network [OSTI]

    Ha, Dong S.

    A Directionality based Location Discovery Scheme for Wireless Sensor Networks Asis Nasipuri and Kai is a large ad hoc network of densely dis- tributed sensors that are equipped with low power wireless number of such wireless sensors can be networked to coordinate amongst themselves and per- form the much

  17. These works have been submitted to the IEEE for possible publication in the IEEE Transactions on Power Delivery. Copyright may be transferred without notice,

    E-Print Network [OSTI]

    .e. faults, voltage collapses), but may also intentionally disconnect when the quality of power from the grid in 1998 as a cluster of micro-generators and storage with the ability to separate and isolate itself from on Power Delivery. Copyright may be transferred without notice, after which this version may no longer

  18. Abstract--This paper presents a wireless, battery-free, platform for sensing and computation that is powered and read

    E-Print Network [OSTI]

    Herr, Hugh

    that is powered and read by a standards compliant Ultra-High Frequency (UHF) Radio Frequency Identification (RFID of the Electronic Product Code (EPC) Class 1 Generation 1 protocol. When queried, the platform communicates of the WISP along with its implementation as a PCB allows for flexible integration of arbitrary low-power

  19. A Wilkinson Power Divider on a Low Resistivity Si Substrate with a Polyimide Interface Layer for Wireless Circuits

    E-Print Network [OSTI]

    Tentzeris, Manos

    1 A Wilkinson Power Divider on a Low Resistivity Si Substrate with a Polyimide Interface Layer Abstract A 3-dB Wilkinson power divider on low resistivity silicon substrate (20 :-cm) with a polyimide and isolation is achieved by using a 20 Pm thick polyimide interface layer on top of the silicon wafer

  20. Wireless communication devices and movement monitoring methods

    DOE Patents [OSTI]

    Skorpik, James R.

    2006-10-31T23:59:59.000Z

    Wireless communication devices and movement monitoring methods are described. In one aspect, a wireless communication device includes a housing, wireless communication circuitry coupled with the housing and configured to communicate wireless signals, movement circuitry coupled with the housing and configured to provide movement data regarding movement sensed by the movement circuitry, and event processing circuitry coupled with the housing and the movement circuitry, wherein the event processing circuitry is configured to process the movement data, and wherein at least a portion of the event processing circuitry is configured to operate in a first operational state having a different power consumption rate compared with a second operational state.

  1. Insecurity of Wireless Networks

    SciTech Connect (OSTI)

    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

    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.

  2. Peak Power Bi-directional Transfer From High Speed Flywheel to Electrical Regulated Bus Voltage System

    E-Print Network [OSTI]

    Szabados, Barna

    life cycle. A reduced life cycle will translate into high maintenance costs since the batteries have devices capable of a minimum power of 400 W/kg, energy of 200 Wh/kg, a life cycle of 2500 at a cost vehicle during both acceleration and regenerative braking. The life cycle of the electric vehicle

  3. Efficient wireless charging with gallium nitride FETs

    E-Print Network [OSTI]

    Yeh, Theresa (Theresa I.)

    2014-01-01T23:59:59.000Z

    Though wireless charging is more convenient than traditional wired charging methods, it is currently less efficient. This not only wastes power but can also result in a longer charging time. Improving the efficiency of ...

  4. Wireless, automated monitoring for potential landslide hazards 

    E-Print Network [OSTI]

    Garich, Evan Andrew

    2007-09-17T23:59:59.000Z

    . Commercially available soil moisture probes and soil tilt sensors were combined with low-power, wireless data transmitters to form a self-configuring network of soil monitoring sensors. The remote locations of many slope stability hazard sites eliminates...

  5. Beamforming-Based Broadcast Scheme for Multihop Wireless Networks with Transmission

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Beamforming-Based Broadcast Scheme for Multihop Wireless Networks with Transmission Range transmission power for a beamforming-based broadcast scheme in multihop wireless networks? To address wireless network, and demonstrated in terms of implicated nodes'ratio, power transmission gain

  6. Development of Molten-Salt Heat Transfer Fluid Technology for Parabolic Trough Solar Power Plants - Public Final Technical Report

    SciTech Connect (OSTI)

    Grogan, Dylan C. P.

    2013-08-15T23:59:59.000Z

    Executive Summary This Final Report for the "Development of Molten-Salt Heat Transfer Fluid (HTF) Technology for Parabolic Trough Solar Power Plants” describes the overall project accomplishments, results and conclusions. Phase 1 analyzed the feasibility, cost and performance of a parabolic trough solar power plant with a molten salt heat transfer fluid (HTF); researched and/or developed feasible component options, detailed cost estimates and workable operating procedures; and developed hourly performance models. As a result, a molten salt plant with 6 hours of storage was shown to reduce Thermal Energy Storage (TES) cost by 43.2%, solar field cost by 14.8%, and levelized cost of energy (LCOE) by 9.8% - 14.5% relative to a similar state-of-the-art baseline plant. The LCOE savings range met the project’s Go/No Go criteria of 10% LCOE reduction. Another primary focus of Phase 1 and 2 was risk mitigation. The large risk areas associated with a molten salt parabolic trough plant were addressed in both Phases, such as; HTF freeze prevention and recovery, collector components and piping connections, and complex component interactions. Phase 2 analyzed in more detail the technical and economic feasibility of a 140 MWe,gross molten-salt CSP plant with 6 hours of TES. Phase 2 accomplishments included developing technical solutions to the above mentioned risk areas, such as freeze protection/recovery, corrosion effects of applicable molten salts, collector design improvements for molten salt, and developing plant operating strategies for maximized plant performance and freeze risk mitigation. Phase 2 accomplishments also included developing and thoroughly analyzing a molten salt, Parabolic Trough power plant performance model, in order to achieve the project cost and performance targets. The plant performance model and an extensive basic Engineering, Procurement, and Construction (EPC) quote were used to calculate a real levelized cost of energy (LCOE) of 11.50˘/kWhe , which achieved the Phase 2 Go/No Go target of less than 0.12˘/kWhe. Abengoa Solar has high confidence that the primary risk areas have been addressed in the project and a commercial plant utilizing molten salt is economically and technically feasible. The strong results from the Phase 1 and 2 research, testing, and analyses, summarized in this report, led Abengoa Solar to recommend that the project proceed to Phase 3. However, a commercially viable collector interconnection was not fully validated by the end of Phase 2, combined with the uncertainty in the federal budget, forced the DOE and Abengoa Solar to close the project. Thus the resources required to construct and operate a molten salt pilot plant will be solely supplied by Abengoa Solar.

  7. Microwave Metamaterial Applications using Complementary Split Ring Resonators and High Gain Rectifying Reflectarray for Wireless Power Transmission 

    E-Print Network [OSTI]

    Ahn, Chi Hyung

    2011-10-21T23:59:59.000Z

    .C. Brown for 2.45GHz RF-to DC power conversion [19]. To achieve high conversion efficency, Brown later used a GaAs-Pt shottky barrier diode and aluminum bar dipole with 90.6 % conversion efficiency in 1977 [20]. The 1970?s oil embargo encouraged... developed by JPL with 50 V output [26]. In 2003, B. Strassner and K. Chang at Texas A&M University reported a C-band circularly polarized high efficency rectenna array with high gain rhombic loop antennas [27]-[28]. Several rectenna array types have...

  8. Phenylnaphthalene as a Heat Transfer Fluid for Concentrating Solar Power: High-Temperature Static Experiments

    SciTech Connect (OSTI)

    Bell, Jason R [ORNL; Joseph III, Robert Anthony [ORNL; McFarlane, Joanna [ORNL; Qualls, A L [ORNL

    2012-05-01T23:59:59.000Z

    Concentrating solar power (CSP) may be an alternative to generating electricity from fossil fuels; however, greater thermodynamic efficiency is needed to improve the economics of CSP operation. One way of achieving improved efficiency is to operate the CSP loop at higher temperatures than the current maximum of about 400 C. ORNL has been investigating a synthetic polyaromatic oil for use in a trough type CSP collector, to temperatures up to 500 C. The oil was chosen because of its thermal stability and calculated low vapor and critical pressures. The oil has been synthesized using a Suzuki coupling mechanism and has been tested in static heating experiments. Analysis has been conducted on the oil after heating and suggests that there may be some isomerization taking place at 450 C, but the fluid appears to remain stable above that temperature. Tests were conducted over one week and further tests are planned to investigate stabilities after heating for months and in flow configurations. Thermochemical data and thermophysical predictions indicate that substituted polyaromatic hydrocarbons may be useful for applications that run at higher temperatures than possible with commercial fluids such as Therminol-VP1.

  9. assisting nuclear power: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Power Control 1 61500 Network Assisted Power Control for Wireless Data David lesson of cellular telephone network operation is that effective power control is essential...

  10. Wireless passive radiation sensor

    DOE Patents [OSTI]

    Pfeifer, Kent B; Rumpf, Arthur N; Yelton, William G; Limmer, Steven J

    2013-12-03T23:59:59.000Z

    A novel measurement technique is employed using surface acoustic wave (SAW) devices, passive RF, and radiation-sensitive films to provide a wireless passive radiation sensor that requires no batteries, outside wiring, or regular maintenance. The sensor is small (<1 cm.sup.2), physically robust, and will operate unattended for decades. In addition, the sensor can be insensitive to measurement position and read distance due to a novel self-referencing technique eliminating the need to measure absolute responses that are dependent on RF transmitter location and power.

  11. Energy Harvesting Wireless Communications

    E-Print Network [OSTI]

    Ulukus, Sennur

    perspective what should we care about for energy efficient design of cellular/conventional wireless networks

  12. Heat transfer and flow on the first-stage blade tip of a power generation gas turbine: Part 2 -- Simulation results

    SciTech Connect (OSTI)

    Ameri, A.A.; Bunker, R.S.

    2000-04-01T23:59:59.000Z

    A combined experimental and computational study has been performed to investigate the detailed distribution of convective heat transfer coefficients on the first-stage blade tip surface for a geometry typical of large power generation turbines (> 100 MW). This paper is concerned with the numerical prediction of the tip surface heat transfer. Good comparison with the experimental measured distribution was achieved through accurate modeling of the most important features of the blade passage and heating arrangement as well as the details of experimental rig likely to affect the tip heat transfer. A sharp edge and a radiused edge tip was considered. The results using the radiused edge tip agreed better with the experimental data. This improved agreement was attributed to the absence of edge separation on the tip of the radiused edge blade.

  13. Control over Wireless NetworksControl over Wireless Networks Karl Henrik Johansson

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    Control over Wireless NetworksControl over Wireless Networks Karl Henrik Johansson School wireless networksOutline: Control over wireless networks · Motivating examples · Benefits and barriersMotivation for control over wireless networkscontrol over wireless networks · Wireless industrial automation

  14. Wireless Integrated Circuit for 100-Channel Neural Stimulation

    E-Print Network [OSTI]

    Harrison, Reid R.

    and retracting charge from the nervous system. Wireless communication and power are achieved over a 2.765-MHz in power supply regulation and a coil for power and command reception. The chip was fabricated in power supply regulation and a coil for power and command reception. System-level chip designs as well

  15. Towards Energy-Awareness in Managing Wireless LAN Applications

    E-Print Network [OSTI]

    Bhatti, Saleem N.

    Several power saving mechanisms which aim to enhance energy efficiency have been proposed and are partially imple- mented: e.g. 802.11 Power Save Mode (PSM) [2], Unsched- uled Automatic Power Save Delivery (U-APSD) [3], WMM Power Save (WMM-PS) [4], Dynamic MIMO Power Save [5], and Wake-on-Wireless [6

  16. Low-Cost Truthful Multicast in Selfish and Rational Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Li, Xiang-Yang

    en- joy a more flexible composition. A wireless ad hoc network is a collection of radio devices limited transmission power. One of the dis- tinctive features of wireless networks is that the signal sent1 Low-Cost Truthful Multicast in Selfish and Rational Wireless Ad Hoc Networks Weizhao Wang Xiang

  17. Structuring Measurements for Modeling and the Deployment of Industrial Wireless Networks

    E-Print Network [OSTI]

    Zilic, Zeljko

    . Replacing wired units with wireless sensor network (WSN) nodes offers more flexibility, and ultimately coverage during its deployment. Wireless networking devices are inherently power-limited, which limits1 Structuring Measurements for Modeling and the Deployment of Industrial Wireless Networks Rong

  18. Wireless Sensor Networks : the hardware challenge and the cross-layering opportunity

    E-Print Network [OSTI]

    Ingrand, François

    #12;Target applications for wireless sensor networks Flight test instrumentation Pilot ­ crew;Target applications for wireless sensor networks Wireless flight test instrumentation Long term Low or medium data rate, low power nodes High number of nodes, different kind of sensors

  19. A Mesh-based Robust Topology Discovery Algorithm for Hybrid Wireless Networks

    E-Print Network [OSTI]

    Birman, Kenneth P.

    A Mesh-based Robust Topology Discovery Algorithm for Hybrid Wireless Networks Ranveer CHANDRA˘ @research.att.com Abstract Wireless networks in home, office and sensor applications consist of nodes by a wireline network. Topology information of the wireless network at these powerful nodes can be used

  20. Energy-aware Broadcasting in Wireless Networks Ioannis Papadimitriou, Leonidas Georgiadis

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Energy-aware Broadcasting in Wireless Networks Ioannis Papadimitriou, Leonidas Georgiadis Abstract--In this paper we address the problem of broadcasting in wireless networks, so that the power consumed by any Terms-- Wireless Networks, Energy Conservation, Di- rected Spanning Tree, Lexicographic Optimization. I

  1. A near optimal algorithm for lifetime optimization in wireless sensor networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A near optimal algorithm for lifetime optimization in wireless sensor networks Karine Deschinkel1.deschinkel, mourad.hakem}@univ-fcomte.fr Keywords: target coverage, wireless sensor networks, centralized method in wireless sensor networks (WSN) is lifetime optimization. Indeed, in WSN each sensor node is battery powered

  2. Antenna-based "Smart Skin" Sensors for Sustainable, Wireless Sensor Networks

    E-Print Network [OSTI]

    Tentzeris, Manos

    Antenna-based "Smart Skin" Sensors for Sustainable, Wireless Sensor Networks Hoseon Leet, George-less, or sustainable, wireless sensor networks with "smart skin" sensor nodes. These sensors are highly applicable a wireless sensor network with smart sensors requires a lot of power due to the mass number of sensor nodes

  3. CS647 -Advanced Topics in Wireless Networks

    E-Print Network [OSTI]

    Amir, Yair

    more computing power in smaller devices flat, lightweight displays with low power consumption new user - Cellular Maintaining the telephone number across geographical areas in a wireless and mobile system Microwave Tower Cell Chicago Washington, DC #12;CS 647 1.7 First Generation Cellular Systems and Services

  4. Design of frequency synthesizers for short range wireless transceivers 

    E-Print Network [OSTI]

    Valero Lopez, Ari Yakov

    2004-09-30T23:59:59.000Z

    The rapid growth of the market for short-range wireless devices, with standards such as Bluetooth and Wireless LAN (IEEE 802.11) being the most important, has created a need for highly integrated transceivers that target drastic power and area...

  5. Routing for Wireless Multi Hop Networks Unifying and Distinguishing Features

    E-Print Network [OSTI]

    Graham, Nick

    -to-end communication, wireless communication provides flexible deployment and use, cost reduction, mobility, network dynamic network conditions due to interference, loss of signal power with distance and freedom of mobilityRouting for Wireless Multi Hop Networks ­ Unifying and Distinguishing Features Technical Report

  6. 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

  7. NeuralWISP: An Energy-Harvesting Wireless Neural Interface with 1-m Range

    E-Print Network [OSTI]

    Herr, Hugh

    that a neural interface communicate and receive power wirelessly. Previous systems [4][5] have achieved wireless operation by using a near-field inductive link to transmit power and data. However, these systems require. It includes a custom low-noise, low power amplifier IC for processing the neural signal and an analog spike

  8. Optimal Power Allocation for Renewable Energy Source

    E-Print Network [OSTI]

    Sinha, Abhinav

    2011-01-01T23:59:59.000Z

    Battery powered transmitters face energy constraint, replenishing their energy by a renewable energy source (like solar or wind power) can lead to longer lifetime. We consider here the problem of finding the optimal power allocation under random channel conditions for a wireless transmitter, such that rate of information transfer is maximized. Here a rechargeable battery, which is periodically charged by renewable source, is used to power the transmitter. All of above is formulated as a Markov Decision Process. Structural properties like the monotonicity of the optimal value and policy derived in this paper will be of vital importance in understanding the kind of algorithms and approximations needed in real-life scenarios. The effect of curse of dimensionality which is prevalent in Dynamic programming problems can thus be reduced. We show our results under the most general of assumptions.

  9. An Overview of strategic measures to assess workforce needs and ensure technology transfer to meet current and future nuclear power operations

    SciTech Connect (OSTI)

    Vincenti, J.R. [acuri.net, 1344 Curtin Street, State College, PA (United States); Stigers, R.A. [Senior Health Physicist-Radwaste, PPL Susquehanna, Berwick, PA (United States)

    2007-07-01T23:59:59.000Z

    Between 1956 and 1989, the number of operating commercial nuclear power plants in the United States increased from none to 109. With the exception of a few plants that were still in final construction, no new nuclear power plants were ordered in the United States as the new millennium began. In 2005, the federal government pronounced the need for new electric power generating systems during the first quarter of the 21. century. The need comes from a desire to curb our reliance on fossil fuels, as well as to provide for a cleaner environment. One of those fuel systems noted was nuclear energy. Given the time between the last active period of nuclear power plant development and construction, there is a need to supply a talented and well-prepared workforce to operate the new plants. It will also be necessary to assess the needs of our current fleet of operating nuclear power plants, of which many are in the process of re-licensing, yet also facing an aging plant workforce. This paper will review and discuss measures to assess diverse workforce needs and technology transfer to meet current licensing requirements as that of future nuclear power plant development in the United States. (authors)

  10. Editorial Manager(tm) for Wireless Networks Manuscript Draft

    E-Print Network [OSTI]

    Kalyanaraman, Shivkumar

    power consumption. We also show that not only transmission power is greatly reduced, but also the aggregate power consumption for a successful transmission and reception. Moreover, a lower transmission power implies lower interference thus potentially increase the network capacity. Index Terms-- Wireless

  11. Operational safety enhancement of Soviet-designed nuclear reactors via development of nuclear power plant simulators and transfer of related technology

    SciTech Connect (OSTI)

    Kohut, P.; Epel, L.G.; Tutu, N.K. [and others

    1998-08-01T23:59:59.000Z

    The US Department of Energy (DOE), under the US government`s International Nuclear Safety Program (INSP), is implementing a program of developing and providing simulators for many of the Russian and Ukrainian Nuclear Power Plants (NPPs). Pacific Northwest National Laboratory (PNNL) and Brookhaven National Laboratory (BNL) manage and provide technical oversight of the various INSP simulator projects for DOE. The program also includes a simulator technology transfer process to simulator design organizations in Russia and Ukraine. Training programs, installation of new simulators, and enhancements in existing simulators are viewed as providing a relatively fast and cost-effective technology transfer that will result in measurable improvement in the safety culture and operation of NPPs. A review of this program, its present status, and its accomplishments are provided in this paper.

  12. Wireless Urban Sensing Systems

    E-Print Network [OSTI]

    2006-01-01T23:59:59.000Z

    enabled by personal wireless sensing devices introduces newpublic or personal servers, but also on mobile devices. For

  13. Integrated All-silicon Thin-film Power Electronics on Flexible Sheets For Ubiquitous Wireless Charging Stations based on Solar-energy Harvesting

    E-Print Network [OSTI]

    . The blocks overcome these challenges and generate AC power using a power inverter and control circuits, all the power inverter circuit. To generate an AC output current, the two solar modules (S1/2) are used maximizes the current, and all of the S1/2 current is delivered to the load, yielding high power-inverter

  14. User managed wireless protocol stacks Vijay T. Raisinghani

    E-Print Network [OSTI]

    Iyer, Sridhar

    User experience on mobile devices is bound by the device constraints of memory, processing power, battery life and variations in the wireless network. Cross layer feedback in the protocol stack is useful

  15. A congestion control scheme for wireless sensor networks

    E-Print Network [OSTI]

    Xiong, Yunli

    2005-08-29T23:59:59.000Z

    In wireless sensor networks (WSN), nodes have very limited power due to hardware constraints. Packet losses and retransmissions resulting from congestion cost precious energy and shorten the lifetime of sensor nodes. This problem motivates the need...

  16. Self-Triggered Control over Wireless Sensor and Actuator Networks

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    . Following this trend, several vendors are introducing devices that communicate over low-power wireless and the §National Science Foun- dation award 0834771. adjust heating, ventilation and air conditioning (HVAC

  17. Abstract--This paper aims at assessing the impact of massive wind power penetration on the calculation of Available Transfer

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . Indeed it is required to reduce available transmission capacities to keep the power system safe despite be maximal without breaching network security. I. INTRODUCTION imited transmission interconnection capacities the uncertainty about wind power. The use of suboptimal transmission capacity allocation methods explains

  18. Chapters 6 & 8 Wireless Networks

    E-Print Network [OSTI]

    Lu, Enyue "Annie"

    Chapters 6 & 8 Wireless Networks and Security Computer Networking:ATop Down Approach 6th edition.W. Ross, All Rights Reserved Wireless, Mobile Networks 6-1 #12;Wireless, Mobile Networks 6-2 Ch. 6: Wireless and Mobile Networks Background: # wireless (mobile) phone subscribers now exceeds # wired phone

  19. Impact of Mobile Transmitter Sources on Radio Frequency Wireless Energy Harvesting

    E-Print Network [OSTI]

    Sanyal, Sugata

    1 Impact of Mobile Transmitter Sources on Radio Frequency Wireless Energy Harvesting Antonio Organization, Tata Consultancy Services, India. Abstract--Wireless energy harvesting sensor networks consti battery resource, but are able to re-charge themselves through directed electromagnetic energy transfer

  20. Heat transfer and flow on the first-stage blade tip of a power generation gas turbine: Part 1 -- Experimental results

    SciTech Connect (OSTI)

    Bunker, R.S.; Bailey, J.C.; Ameri, A.A.

    2000-04-01T23:59:59.000Z

    A combined experimental and computational study has been performed to investigate the detailed distribution of convective heat transfer coefficients on the first-stage blade tip surface for a geometry typical of large power generation turbines (> 100 MW). This paper is concerned with the design and execution of the experimental portion of the study, which represents the first reported investigation to obtain nearly full surface information on heat transfer coefficients within an environment that develops an appropriate pressure distribution about an airfoil blade tip and shroud model. A stationary blade cascade experiment has been run consisting of three airfoils, the center airfoil having a variable tip gap clearance. The airfoil models the aerodynamic tip section of a high-pressure turbine blade with inlet Mach number of 0.30, exit Mach number of 0.75, pressure ratio of 1.45, exit Reynolds number based on axial chord of 2.57 x 10{sup 6}, and total turning of about 110 degrees. A hue detection based liquid crystal method is used to obtain the detailed heat transfer coefficient distribution on the blade tip surface for flat, smooth tip surfaces with both sharp and rounded edges. The cascade inlet turbulence intensity level took on values of either 5 or 9%. The cascade also models the casing recess in the shroud surface ahead of the blade. Experimental results are shown for the pressure distribution measurements on the airfoil near the tip gap, on the blade tip surface, and on the opposite shroud surface. Tip surface heat transfer coefficient distributions are shown for sharp edge and rounded edge tip geometries at each of the inlet turbulence intensity levels.

  1. Multiagent Coordination in Microgrids via Wireless Networks

    E-Print Network [OSTI]

    Shen, Xuemin "Sherman"

    is indispensable to incorporate more distributed energy resource (DER) units, such as the distributed generation load (or generator) or islanded as a self-sustained power system, which significantly simplifies by localized elec- tricity generation, storage, and consumption. Wireless communication is a promising means

  2. OIT Wireless Telemetry for Industrial Applications

    SciTech Connect (OSTI)

    Manges, WW

    2002-09-03T23:59:59.000Z

    The need for advanced wireless technology has been identified in the National Research Council publication (1) ''Manufacturing Process Controls for the Industries of the Future as a Critical Technology for the Future''. The deployment challenges to be overcome in order for wireless to be a viable option include: (1) eliminating interference (assuring reliable communications); (2) easing the deployment of intelligent, wireless sensors; (3) developing reliable networks (robust architectures); (4) developing remote power (long-lasting and reliable); and (5) developing standardized communication protocols. This project demonstrated the feasibility of robust wireless sensor networks that could meet these requirements for the harsh environments common to the DOE/OIT Industries of the Future. It resulted in a wireless test bed that was demonstrated in a paper mill and a steel plant. The test bed illustrated key protocols and components that would be required in a real-life, wireless network. The technologies for low power connectivity developed and demonstrated at the plant eased fears that the radios would interfere with existing control equipment. The same direct sequence, spread spectrum (DSSS) technology that helped assure the reliability of the connection also demonstrated that wireless communication was feasible in these plants without boosting the transmitted power to dangerous levels. Our experience and research have indicated that two key parameters are of ultimate importance: (1) reliability and (2) inter-system compatibility. Reliability is the key to immediate acceptance among industrial users. The importance cannot be overstated, because users will not tolerate an unreliable information network. A longer term issue that is at least as important as the reliability of a single system is the inter-system compatibility between these wireless sensor networks and other wireless systems that are part of our industries. In the long run, the ability of wireless sensor networks to operate cooperatively in an environment that includes wireless LANs, wireless headsets, RF heating, wireless crane controls and many other users of the electromagnetic spectrum will probably be the most important issue we can address. A network of units (Figure 1) has been developed that demonstrates the feasibility of direct-sequence spread spectrum wireless sensor networking for industrial environments. The hardware consists of a group of reprogrammable transceivers that can act as sensor nodes or network nodes or both. These units and the team that built them are the heart of a test bed development system that has been used successfully in demonstrations at various industrial sites. As previously reported, these units have been successfully tested at a paper mill. More recently, these units were utilized in a permanent installation at a steel mill. Both of these applications demonstrated the ease with which a new network could be installed, and the reality that DSSS units can operate successfully in plants where narrow band transmitters had previously caused interference with plant operations.

  3. Survivability Considerations in Wireless Networks

    E-Print Network [OSTI]

    Ning, Jianxia

    2012-01-01T23:59:59.000Z

    Forensics Analysis of Packet Losses in Wireless Networks 2.1Neighbor Discovery in 60 GHz Indoor Wireless Networks 4.1in Wireless Networks . . . . . . . . . . . . . 4.2.4

  4. Quality of service analysis for audio over cellular voice networks and cellular wireless wide area networks

    E-Print Network [OSTI]

    Malik, Omair S. (Omair Safwan)

    2007-01-01T23:59:59.000Z

    Cellular Wireless Wide Area Networks (WWANs) are most prevalent and offer high-bandwidth data transfer. We believe WWANs can be availed for voice communications employing Voice Over IP technologies. Such a communication ...

  5. Flexible network wireless transceiver and flexible network telemetry transceiver

    DOE Patents [OSTI]

    Brown, Kenneth D. (Grain Valley, MO)

    2008-08-05T23:59:59.000Z

    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.

  6. Technology Development: Wireless Sensors and Controls BT0201 Review of Energy Scavenging Schemes and Recommended Order of Investigation

    SciTech Connect (OSTI)

    DeSteese, John G.; Olsen, Larry C.; Schienbein, Lawrence A.

    2004-09-01T23:59:59.000Z

    This report reviews the characteristics of four candidate concepts that extract and convert ambient energy to provide electrical power for wireless sensors.

  7. Wireless Network Intrinsic Secrecy

    E-Print Network [OSTI]

    Rabbachin, Alberto

    Wireless secrecy is essential for communication confidentiality, health privacy, public safety, information superiority, and economic advantage in the modern information society. Contemporary security systems are based on ...

  8. Simulation and Evaluation of Unsynchronized Power Saving Mechanisms

    E-Print Network [OSTI]

    Braun, Torsten

    Simulation and Evaluation of Unsynchronized Power Saving Mechanisms in Wireless Ad hoc Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Power Saving in Multi-Hop Wireless Ad hoc Networks 4 2.1 Basic Power Saving Mechanism) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.4 Medium Access Control (MAC) Layer Modifications . . . . . . . . 6 3 Evaluation of Power Saving

  9. Wireless Sensor Networks for Home Health Care

    E-Print Network [OSTI]

    2007-01-01T23:59:59.000Z

    Wireless Sensor Networks for Home Health Care Chris R.Cooperation between wireless sensor networks and existingapplications of wireless sensor networks. In this paper we

  10. Special Issue on “Wireless Sensor Networks”

    E-Print Network [OSTI]

    Yao, Kung; Zhang, Qian; Zhao, Qing

    2009-01-01T23:59:59.000Z

    Special Issue on “Wireless Sensor Networks” Kung Yao & Qianand tracking, etc. Wireless sensor networks utilize theaspects of wireless sensor networks. The first paper, “

  11. Data Transport Control in Wireless Sensor Networks

    E-Print Network [OSTI]

    Zhang, Hongwei; Naik, Vinayak S

    2008-01-01T23:59:59.000Z

    Congestion in Wireless Sensor Networks. ACM SenSys SandeepJohn Anderson (2002). Wireless Sensor Networks for HabitatWorkshop on Wireless Sensor Networks and Applications Miklos

  12. Bioinformatics | Computer Engineering | Cyber Security | Electrical Engineering | Industrial Engineering | Manufacturing Engineering Organizational Behavior | Power Electronics and Systems | Telecommunication Networks | Wireless Innovation

    E-Print Network [OSTI]

    Aronov, Boris

    or in Westchester and Long Island. The degree earned and the body of knowledge is exactly the same as those receivedBioinformatics | Computer Engineering | Cyber Security | Electrical Engineering | Industrial Engineering | Manufacturing Engineering Organizational Behavior | Power Electronics and Systems

  13. Power Allocation and Admission Control in Multiuser Relay Networks via Convex Programming: Centralized and Distributed Schemes

    E-Print Network [OSTI]

    Phan, Khoa T.

    The power allocation problem for multiuser wireless networks is considered under the assumption of amplify-and-forward cooperative diversity. Specifically, optimal centralized and distributed power allocation strategies ...

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

    E-Print Network [OSTI]

    Fang, Xi; Xue, Guoliang

    2011-01-01T23:59:59.000Z

    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

  15. Rateless Deluge: Over-the-Air Programming of Wireless Sensor

    E-Print Network [OSTI]

    Goldberg, Bennett

    1 Rateless Deluge: Over-the-Air Programming of Wireless Sensor Networks using Random Linear Codes thus design and implement two rateless OAP protocols, rateless Deluge and ACKless Deluge, both of which replace the data transfer mechanism of the established OAP Deluge protocol with rateless analogs

  16. Rateless Deluge: Over-the-Air Programming of Wireless Sensor

    E-Print Network [OSTI]

    Starobinski, David

    Rateless Deluge: Over-the-Air Programming of Wireless Sensor Networks using Random Linear Codes thus design and implement two rateless OAP protocols, rateless Deluge and ACKless Deluge, both of which replace the data transfer mechanism of the estab- lished OAP Deluge protocol with rateless analogs

  17. Wireless sensor networks for measuring traffic

    E-Print Network [OSTI]

    Varaiya, Pravin

    Wireless sensor networks for measuring traffic University of California, Berkeley Sing Yiu Cheung, Sinem Coleri, and Pravin Varaiya 2 Outline · Traffic measurement · Wireless Sensor Networks · Vehicle wireless sensor networks compete? 7 Outline · Traffic measurement · Wireless Sensor Networks · Vehicle

  18. Empirical Analysis of Transmission Power Control Algorithms

    E-Print Network [OSTI]

    Culler, David E.

    Empirical Analysis of Transmission Power Control Algorithms for Wireless Sensor Networks Jaein · Power saving techniques in WSN ­ Duty-cycling, TX-power control, clustering ­ We study effect of TX-power transmission. End-to-end delivery rate TX Power Control Best of Fixed TX Power El Batt [1] 36.5% 35.5% PCBL [6

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

    SciTech Connect (OSTI)

    Patrick O'Neill

    2009-06-30T23:59:59.000Z

    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

  20. Wireless Power May Cut the Cord for Plug-In Devices, Including Cars1 by Will Ferguson for National Geographic News, abbreviated2

    E-Print Network [OSTI]

    South Bohemia, University of

    ), aims to redefine how people use8 energy, making it possible to power devices without ever plugging them inches." WiTricity devices share energy through magnetic fields as well. However, unlike those generated legs at the resonant frequency of a swing to fly through the air, or an opera singer shatters a24 wine

  1. Bus transfer analysis

    SciTech Connect (OSTI)

    Weronick, R.; Hassan, I.D. [Raytheon Engineers and Constructors, Lyndhurst, NJ (United States)

    1996-11-01T23:59:59.000Z

    This paper discusses bus transfer schemes and the methodology used in modeling and analysis. Due to the unavailability of generic acceptance criteria, simulations were performed to analyze the actual fast bus transfer operations at four operating nuclear power generating stations. Sample simulation results illustrating the transient variations in motors currents and torques are included. The analyses were performed to ensure that motors and other rotating parts are not subjected to excessive or accumulated stresses caused by bus transfer operations. A summary of the experience gained in the process of performing this work and suggested bus transfer acceptance criteria are also presented.

  2. S-MAPEL: Monotonic Optimization for Non-convex Joint Power Control and Scheduling Problems

    E-Print Network [OSTI]

    Huang, Jianwei

    generation wireless networks. Transmission power control in wireless networks has been extensively studied-limited wireless networks where si- multaneous transmissions on nearby links heavily interfere with each other of concurrently active links as well as the flexibility to vary power allocation over time gives rise to a series

  3. Wireless Multichannel Integrated Potentiostat for Distributed Neurotransmitter Sensing

    E-Print Network [OSTI]

    Cauwenberghs, Gert

    scales from microamperes to picoamperes. The wireless module is able to harvest power through inductively and duplex data communication, usually supplied by wires connected through the skin. This wiring or tethering in the human body. A very promising alternative for implanted devices is RF power harvesting through inductive

  4. Flexible Resource Allocation for Multicast in OFDMA based Wireless Networks

    E-Print Network [OSTI]

    New South Wales, University of

    Flexible Resource Allocation for Multicast in OFDMA based Wireless Networks Sanjay Jha and Xin Zhao) to minimise the total transmission power with the constraints on user's data rate or bit error rate [12], and 2) to maximise system throughput with the constraints on total transmission power or user

  5. STOCHASTIC CONTROL FOR DISTRIBUTED SYSTEMS WITH APPLICATIONS TO WIRELESS

    E-Print Network [OSTI]

    Huang, Minyi

    communication systems, power control is important at the user level in order to minimize energy requirements, a class of stochastic control problems is for- mulated which includes a fading channel model and a powerSTOCHASTIC CONTROL FOR DISTRIBUTED SYSTEMS WITH APPLICATIONS TO WIRELESS COMMUNICATIONS Minyi Huang

  6. Software-related Energy Footprint of a Wireless Broadband Module

    E-Print Network [OSTI]

    on the power consumption. This opens up for potential energy savings by creating better ap- plications Keywords 3G, Energy footprint, Power consumption, Wireless broad- band 1. INTRODUCTION The battery lifetime the energy consumption is an essential part of de- veloping new hardware components, it has been a neglected

  7. INTRODUCTION As wireless and portable mobile devices become

    E-Print Network [OSTI]

    Hou, Y. Thomas

    than electric power grids). After the first electri- cal signal was sent across the Atlantic, Nikola Tesla, a pioneering electrical engineer, experi- mented with large scale wireless power distribu- tion, Tesla's invention was not successful and was never put into practical use. In the late 20th century

  8. Localized radio frequency communication using asynchronous transfer mode protocol

    DOE Patents [OSTI]

    Witzke, Edward L. (Edgewood, NM); Robertson, Perry J. (Albuquerque, NM); Pierson, Lyndon G. (Albuquerque, NM)

    2007-08-14T23:59:59.000Z

    A localized wireless communication system for communication between a plurality of circuit boards, and between electronic components on the circuit boards. Transceivers are located on each circuit board and electronic component. The transceivers communicate with one another over spread spectrum radio frequencies. An asynchronous transfer mode protocol controls communication flow with asynchronous transfer mode switches located on the circuit boards.

  9. Ultra Low Power IEEE 802.15.4/ZIGBEE Compliant Transceiver 

    E-Print Network [OSTI]

    Hussien, Faisal A.

    2011-02-22T23:59:59.000Z

    Low power wireless communications is the most demanding request among all wireless users. A battery life that can survive for years without being replaced, makes it realistic to implement many applications where the battery is unreachable (e...

  10. Adaptive Scheduling in Ad Hoc and Cellular Wireless Networks

    E-Print Network [OSTI]

    Tan, Choo Chin

    2013-01-01T23:59:59.000Z

    organization wireless networks and wireless mobile ad-hocfor heterogeneous wireless network”, in Proc. of IEEER. Khalaf, “Ad hoc wireless networks with mobile backbones,”

  11. Reliable and Energy-Efficient Routing for Static Wireless Ad Hoc Networks with Unreliable Links

    E-Print Network [OSTI]

    Wang, Yu

    Reliable and Energy-Efficient Routing for Static Wireless Ad Hoc Networks with Unreliable Links, Yanwei Wu, Student Member, IEEE, and Yong Qi, Member, IEEE Abstract--Energy efficient routing and power. In this paper, we address the problem of energy efficient reliable routing for wireless ad hoc networks

  12. Energy Efficient Communication in Next Generation Rural-Area Wireless Networks

    E-Print Network [OSTI]

    Belding-Royer, Elizabeth M.

    of flexible wireless transmission over long- distance white space links. We theoretically and experimentally and develop Power- Rate, a protocol that dynamically adjusts transmission parameters according to channelEnergy Efficient Communication in Next Generation Rural-Area Wireless Networks Veljko Pejovic

  13. Sensor Wars: Detecting and Defending Against Spam Attacks in Wireless Sensor Networks

    E-Print Network [OSTI]

    Levi, Albert

    network are discussed in [7]. Security, network bandwidth and power consumption in sensor networksSensor Wars: Detecting and Defending Against Spam Attacks in Wireless Sensor Networks Serdar Sancak@sabanciuniv.edu Abstract--Anti-nodes deployed inside a wireless sensor network can frequently generate dummy data packets

  14. Adaptive Resource Allocation in SDMA-based Wireless Broadband Networks with OFDM Signaling

    E-Print Network [OSTI]

    Koutsopoulos, Iordanis

    of wireless broadband access in local and wide area networks is the main expression of the need for flexible to adjust pa- rameters such as transmission power, modulation level, symbol rate or forward error correctionAdaptive Resource Allocation in SDMA-based Wireless Broadband Networks with OFDM Signaling Iordanis

  15. Experiences with a High-Fidelity Wireless Building Energy Auditing Network

    E-Print Network [OSTI]

    Dutta, Prabal

    Experiences with a High-Fidelity Wireless Building Energy Auditing Network Xiaofan Jiang, Minh Van to determine and audit the energy envelope of an active labo- ratory. Classic WSN issues of coverage, Experimentation, Measurement, Performance, Human Factors Keywords Energy, Audit, Building, Power, Wireless, Sensor

  16. Sensorcam: An Energy-Efficient Smart Wireless Camera for Environmental Monitoring

    E-Print Network [OSTI]

    Vetterli, Martin

    and the "intelligence" of the camera it- self, we demonstrate an energy-efficient wireless monitoring system in a realSensorcam: An Energy-Efficient Smart Wireless Camera for Environmental Monitoring Zichong Chen camera running a Linux-base open system. Through better power manage- ment in idle period

  17. Design under Constraints of Availability and Energy for Sensor Node in Wireless Sensor Network

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Design under Constraints of Availability and Energy for Sensor Node in Wireless Sensor Network Van by designers are availability and power/energy management for WSN. This paper presents a design for a wireless sensor node, which provides automated reconfiguration for both availability and energy-efficient use

  18. IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, ACCEPTED FOR PUBLICATION 1 Link Energy Minimization in

    E-Print Network [OSTI]

    Heinzelman, Wendi

    , where transmit power can be flexibly adjusted to minimize the energy consumption [7IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, ACCEPTED FOR PUBLICATION 1 Link Energy Minimization in IR-UWB Based Wireless Networks Tianqi Wang, Student Member, IEEE, Wendi Heinzelman, Senior Member

  19. Wireless Security Techniques for Coordinated Manufacturing and On-line Hardware Trojan Detection

    E-Print Network [OSTI]

    Potkonjak, Miodrag

    Wireless Security Techniques for Coordinated Manufacturing and On-line Hardware Trojan Detection) attacks that impose severe threats to the security and integrity of wireless networks and systems. We activi- ties, consumes ultra-low leakage power, and hides from delay characterizations. Therefore, the HT

  20. Integrated Scheduling Using Rendezvous Window and Sniff Mode for Wireless Personal Area Networks

    E-Print Network [OSTI]

    Lee, Tae-Jin

    by connecting many light-weight personal devices such as PDAs, mobile phones, and media players. UWB (Ultra WideIntegrated Scheduling Using Rendezvous Window and Sniff Mode for Wireless Personal Area Networks and in a piconet level as well as power saving, which is desired for wireless personal area network systems. 1

  1. Barter-based cooperation in delay-tolerant personal wireless networks

    E-Print Network [OSTI]

    Bencsáth, Boldizsár

    from the prolifera- tion of Bluetooth capable personal devices such as mobile phones, PDAs, and MP3-tolerant wireless network of personal devices. A potential problem in delay-tolerant personal wireless networks. The motivation for such a selfish behavior is that personal devices are usually bat- tery powered and have

  2. Wireless Sensors and Networks for Advanced Energy Management

    SciTech Connect (OSTI)

    Hardy, J.E.

    2005-05-06T23:59:59.000Z

    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.

  3. Network coded wireless architecture

    E-Print Network [OSTI]

    Katti, Sachin Rajsekhar

    2008-01-01T23:59:59.000Z

    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 ...

  4. Distributed Connectivity of Wireless Networks

    E-Print Network [OSTI]

    Halldorsson, Magnus M

    2012-01-01T23:59:59.000Z

    We consider the problem of constructing a communication infrastructure from scratch, for a collection of identical wireless nodes. Combinatorially, this means a) finding a set of links that form a strongly connected spanning graph on a set of $n$ points in the plane, and b) scheduling it efficiently in the SINR model of interference. The nodes must converge on a solution in a distributed manner, having no means of communication beyond the sole wireless channel. We give distributed connectivity algorithms that run in time $O(poly(\\log \\Delta, \\log n))$, where $\\Delta$ is the ratio between the longest and shortest distances among nodes. Given that algorithm without prior knowledge of the instance are essentially limited to using uniform power, this is close to best possible. Our primary aim, however, is to find efficient structures, measured in the number of slots used in the final schedule of the links. Our main result is algorithms that match the efficiency of centralized solutions. Specifically, the networks...

  5. Power management adaptation techniques for video transmission Christos Bouras1,2,

    E-Print Network [OSTI]

    Bouras, Christos

    Power management adaptation techniques for video transmission over TFRC Christos Bouras1 of the communicating nodes, most notably their transmission power. While increased power generally correlates, Greece SUMMARY In this paper, we describe power management adaptation techniques for wireless video

  6. Using Solid Particles as Heat Transfer Fluid for use in Concentrating...

    Broader source: Energy.gov (indexed) [DOE]

    Using Solid Particles as Heat Transfer Fluid for use in Concentrating Solar Power (CSP) Plants Using Solid Particles as Heat Transfer Fluid for use in Concentrating Solar Power...

  7. Threat Insight Quarterly Wireless Technology

    E-Print Network [OSTI]

    X-Force ® Threat Insight Quarterly Wireless Technology April 2006 #12;X - F O R C E T H R E A T I N the Wireless Threat ..................................................3 Wireless Threats-Force Catastrophic Risk Index...................................... 13 Future X-Force Threat Insight Quarterly Topics

  8. Wireless energy transmission to supplement energy harvesters in sensor network applications

    SciTech Connect (OSTI)

    Farinholt, Kevin M [Los Alamos National Laboratory; Taylor, Stuart G [Los Alamos National Laboratory; Park, Gyuhae [Los Alamos National Laboratory; Farrar, Charles R [Los Alamos National Laboratory

    2010-01-01T23:59:59.000Z

    In this paper we present a method for coupling wireless energy transmission with traditional energy harvesting techniques in order to power sensor nodes for structural health monitoring applications. The goal of this study is to develop a system that can be permanently embedded within civil structures without the need for on-board power sources. Wireless energy transmission is included to supplement energy harvesting techniques that rely on ambient or environmental, energy sources. This approach combines several transducer types that harvest ambient energy with wireless transmission sources, providing a robust solution that does not rely on a single energy source. Experimental results from laboratory and field experiments are presented to address duty cycle limitations of conventional energy harvesting techniques, and the advantages gained by incorporating a wireless energy transmission subsystem. Methods of increasing the efficiency, energy storage medium, target applications and the integrated use of energy harvesting sources with wireless energy transmission will be discussed.

  9. Applying an intelligent and automated emissions measurement system to characterize the RF environment for supporting wireless technologies

    SciTech Connect (OSTI)

    Keebler, P. F.; Phipps, K. O. [EPRI Solutions, 942 Corridor Park Blvd, Knoxville, TN 37932 (United States)

    2006-07-01T23:59:59.000Z

    The use of wireless technologies in commercial and industrial facilities has grown significantly in the past several years. New applications of wireless technologies with increasing frequency and varying radiated power are being developed everyday. Wireless application specialists and end users have already identified several sources of electromagnetic interference (EMI) in these facilities. Interference has been reported between wireless devices and between these devices and other types of electronic equipment either using frequencies in the unlicensed wireless spectrum or equipment that may generate undesired man-made noise in this spectrum. Facilities that are not using the wireless band should verify the spectral quality of that band and the electromagnetic compatibility (EMC) integrity of safety-related power and signal cables before installing wireless technologies. With the introduction of new wireless devices in the same electromagnetic space where analog and digital I and C systems and cables must co-exist, the ability of facility managers to manage their spectra will dictate the degree of interference between wireless devices and other electronic equipment. Because of the unknowns associated with interference with analog and digital I and C systems in the wireless band, nuclear power plants have been slow to introduce wireless technologies in plant areas. With the application of newly developed advanced radiated emissions measurement systems that can record, process, and analyze radiated and conducted emissions in a cost-effective manner, facility managers can more reliably characterize potential locations for wireless technologies, including potential coupling effects with safety-related power and signal cables, with increased confidence that the risks associated with creating an interference can be significantly reduced. This paper will present an effective philosophy already being used in other mission-critical applications for managing EMC, an overview of wireless emissions sources, the need for EMC characterization of power and signal cables with exposure to wireless devices, and an intelligent and automated emissions measurement system. Such a system can be used in nuclear power plants to determine the spectral quality of the wireless band, the EMC characterization of power and signal cables, and if wireless technologies can be collocated in plants while reducing the risk of interference with I and C systems. (authors)

  10. iCalm: Wearable Sensor and Network Architecture for Wirelessly Communicating and Logging Autonomic Activity

    E-Print Network [OSTI]

    Dobson, Kelly

    Widespread use of affective sensing in healthcare applications has been limited due to several practical factors, such as lack of comfortable wearable sensors, lack of wireless standards, and lack of low-power affordable ...

  11. Self-Triggered Control for Industrial Wireless Sensor and Actuator Networks

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    . Following this trend, several vendors are introducing devices that communicate over low-power wireless are deployed to adjust heating, ventilation and air conditioning (HVAC) and illumination. And in particular

  12. Reconfigurable Wireless Interface for Networking Sensors (ReWINS)

    E-Print Network [OSTI]

    California at Los Angeles, University of

    , Rajit Gadh {harish, bsp, gadh}@wireless.ucla.edu Wireless Internet for the Mobile Enterprise Consortium

  13. Optimal Deployment of Large Wireless Sensor Networks

    E-Print Network [OSTI]

    Toumpis, Stavros

    1 Optimal Deployment of Large Wireless Sensor Networks S. Toumpis, Member, IEEE, and Leandros, Sensor networks. I. INTRODUCTION A. Wireless Sensor Networks Wireless sensor networks are comprised of sensors that are equipped with wireless transceivers and so are able to form a wireless network [3

  14. Multi-Channel and Multi-Rate Adaptation for High-Throughput Wireless Networks

    E-Print Network [OSTI]

    Nguyen, Duy Duc

    2012-01-01T23:59:59.000Z

    layer. Unlike wired networks, wireless networks have to deal2 Background Wireless Networks Wireless technology is allWLAN), wireless mesh networks, wireless metropolitan area

  15. Meerkats: A Power--Aware, Self--Managing Wireless Camera Network for Wide Area Monitoring Jay Boice, Xiaoye Lu, Cintia Margi, Ganymed Stanek, Gefan Zhang, Roberto Manduchi, Katia Obraczka

    E-Print Network [OSTI]

    Obraczka, Katia

    Engineering Department, University of California Santa Cruz What is Meerkats? Wireless network of battery module: Provides information on bandwidth and delay estimates, and remaining battery for neighboring area Fi= body enters camera's FOV Mi = miss from camera i pv = velocity distribution pd = angle

  16. POS: A Practical Order Statistics Service for Wireless Sensor Networks

    E-Print Network [OSTI]

    Cox, Landon

    [3]. Energy is the critical resource in sensor nodes because they are battery powered and replacing batteries in these environments is expensive, difficult, or even dangerous. Typically, wireless statistics can provide a more complete characterization of the distribution of sensor readings than max, min

  17. Impact of Lossy Links on Performance of Multihop Wireless Networks

    E-Print Network [OSTI]

    Holte, Robert

    ] study power-aware routing with renewable energy sources. Ephremides gives an overview on energy concerns Holte Department of Computing Science, University of Alberta, Edmonton, AB, Canada T6G 2E8 yuxi, harms wireless networks have energy constraints. Lossy links also affect energy efficiency due to retransmissions

  18. Short-Term Solar Energy Forecasting Using Wireless Sensor Networks

    E-Print Network [OSTI]

    Cerpa, Alberto E.

    Short-Term Solar Energy Forecasting Using Wireless Sensor Networks Stefan Achleitner, Tao Liu an advantage for output power prediction. Solar Energy Prediction System Our prediction model is based variability of more then 100 kW per minute. For practical usage of solar energy, predicting times of high

  19. Dynamic Master selection in wireless networks Maurits de Graaf

    E-Print Network [OSTI]

    Boucherie, Richard J.

    the condition that the remaining battery capacity of each node is positive duri' algorithm. 1 Introduction Mobile wireless networks are often battery powered which makes it im- portant = m, maxvV c(v, m) for v = m. (1) Each vertex is equipped with battery supply bv, which is reduced

  20. WIRELESS SENSING FOR STRUCTURAL HEALTH MONITORING OF CIVIL STRUCTURES

    E-Print Network [OSTI]

    Lynch, Jerome P.

    communication of response measurements but also for power efficiency. The performance of the sensing unit in structural monitoring systems. The prototype wireless sensing unit is intended to 1) collect measurement data from the sensors installed on a structure, 2) store, manage and locally process the measurement data

  1. Context-aware computing for wireless networks

    E-Print Network [OSTI]

    Ergüt, Salih

    2010-01-01T23:59:59.000Z

    Packet Delay in Wireless Networks 2 Client Side Active QueueCellular and Sensor Networks Wireless Positioning Overviewin Mobile, Ad Hoc and Wireless Networks, pages 1–10, 2006. [

  2. Software Defined Wireless Networks: Unbridling SDNs

    E-Print Network [OSTI]

    Perkins, Dmitri

    Software Defined Wireless Networks: Unbridling SDNs Salvatore Costanzo, Laura Galluccio, Giacomo at analyzing how SDN can be beneficial in wireless infrastructureless networking environments with special emphasis on wireless personal area networks (WPAN). Furthermore, a possible approach (called SDWN

  3. Cooperative Diversity Routing in Wireless Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Cooperative Diversity Routing in Wireless Networks Mostafa Dehghan and Majid Ghaderi Department routing, cooperative commu- nication, cooperative diversity, wireless networks. I. INTRODUCTION Energy efficiency is a challenging problem in wireless networks, especially in ad hoc and sensor networks, where

  4. Characterizing User Mobility in Wireless Networks

    E-Print Network [OSTI]

    Nunes, Bruno Astuto Arouche

    2012-01-01T23:59:59.000Z

    Symmetry of User Mobility in Wireless Networks 3.1 MobilityAnalysis of a local-area wireless network. In ACM MOBI- COMand evaluation of wireless networks and their protocols.

  5. Collaborative Firewalling in Wireless Networks Mahmoud Taghizadeh

    E-Print Network [OSTI]

    Liu, Alex X.

    Collaborative Firewalling in Wireless Networks Mahmoud Taghizadeh Department of ECE Michigan State elements to enforce access policies in computer networks. Open network architecture, shared wireless medium for wireless networks in which nodes collaboratively perform packet filtering to address resource squandering

  6. FUNDAMENTAL PERFORMANCE LIMITS OF WIRELESS SENSOR NETWORKS

    E-Print Network [OSTI]

    Li, Baochun

    FUNDAMENTAL PERFORMANCE LIMITS OF WIRELESS SENSOR NETWORKS ZHIHUA HU, BAOCHUN LI Abstract. Understanding the fundamental performance limits of wireless sensor networks is critical towards. Key words. Wireless sensor networks, network capacity, network lifetime. 1. Introduction. When

  7. Wireless Sensor Network Infrastructure : Construction and Evaluation

    E-Print Network [OSTI]

    Boyer, Edmond

    Wireless Sensor Network Infrastructure : Construction and Evaluation Kamal Beydoun, Violeta Felea main features for efficient energy management in wireless sensor networks. This paper aims to present a distributed and low-cost topology construction algorithm for wireless sensor networks, addressing

  8. Caching in wireless networks

    E-Print Network [OSTI]

    Niesen, Urs

    We consider the problem of delivering content cached in a wireless network of n nodes randomly located on a square of area n. In the most general form, this can be analyzed by considering the 2[superscript n] timesn-dimensional ...

  9. Wireless Sensor Network for Electric Transmission Line Monitoring

    SciTech Connect (OSTI)

    Alphenaar, Bruce

    2009-06-30T23:59:59.000Z

    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)

  10. The TFRC protocol and its usage for wireless video transmission Christos Bouras1,2

    E-Print Network [OSTI]

    Bouras, Christos

    ) protocol in the area of efficient wireless video transmission and its possible usage in cross-layer power-layer approaches for adaptation of the power transmission level of the sender and TFRC feedback information, and therefore user experience, without unnecessary power consumption. INTRODUCTION Networking complexity has led

  11. Comparison of two wireless ad hoc routing protocols on a hardware test-bed

    E-Print Network [OSTI]

    Brown, Timothy X.

    and are equipped with wireless ethernet cards. To maximize the lifetime of the node, conservation of battery power.g. at the operating system level, physical level, and MAC level. Energy can be conserved at the routing level by designing cross-layered protocols and deploying low-power routing algorithms that use the power cost

  12. Design and fabrication of an RF power LDMOSFET on SOI

    E-Print Network [OSTI]

    Fiorenza, James G. (James George), 1972-

    2002-01-01T23:59:59.000Z

    This thesis studied thin-film Silicon-on-Insulator (SOI) LDMOSFET technology for RF power amplifier applications. To conduct this study, two generations of SOI RF power devices for portable wireless systems were designed ...

  13. Hydrogen Fuel Cells Providing Critical Backup Power | Department...

    Broader source: Energy.gov (indexed) [DOE]

    Fuel Cells Providing Critical Backup Power Hydrogen Fuel Cells Providing Critical Backup Power April 9, 2010 - 3:43pm Addthis Customers of AT&T Wireless and Pacific Gas & Electric...

  14. These works have been submitted to the IEEE for possible publication in the IEEE Transactions on Power Systems. Copyright may be transferred without notice,

    E-Print Network [OSTI]

    of transmission system constraints on market power potential. Locational marginal prices (LMPs) which satisfy are organized into groups that have the potential to exhibit market power, and corresponding price perturbation vectors are found such that the generators in a group with market power potential can adjust prices

  15. A Distributed Power Control and Routing Scheme for Rechargeable Sensor Networks

    E-Print Network [OSTI]

    Nasipuri, Asis

    A Distributed Power Control and Routing Scheme for Rechargeable Sensor Networks Amitangshu Pal power control and quality aware routing scheme for rechargeable wireless sensor networks (WSNs consumption based on estimated energy resources. Transmission power control has been widely researched

  16. Map of wireless networks For more information on University wireless services visit

    E-Print Network [OSTI]

    Martin, Stephen John

    Map of wireless networks For more information on University wireless services visit: http://www.shef.ac.uk/cics/wireless. Corporate Information and Computing Services. Connecting To the Wireless Network. Mac OS X, Apple iPhone and iPod Touch #12;Connecting to the eduroam wireless network Mac OS X Prerequisites Mac OS X 10

  17. Multi-hop routing for wireless mesh networks

    E-Print Network [OSTI]

    Bhorkar, Abhijeet

    2012-01-01T23:59:59.000Z

    in Wireless Mesh Networks . . . . . . . . . . . . . 1.2in Mobile, Ad Hoc, and Wireless Networks (WiOpt), [45] Amanin ICDCS Workshop on Wireless Networks and Mobile Computing,

  18. Maximizing the throughput of large ad hoc wireless networks

    E-Print Network [OSTI]

    Hua, Yingbo; Huang, Yi; J, Garcia-Luna-Aceves J

    2006-01-01T23:59:59.000Z

    The transport capacity of wireless networks over fadingimprovement of ad hoc wireless networks using directionalThe capacity of wireless networks,” IEEE Trans. Inform.

  19. Traffic Management and Net Neutrality in Wireless Networks

    E-Print Network [OSTI]

    Jordan, Scott

    2011-01-01T23:59:59.000Z

    and resource allocation in wireless multimedia networks.between wired and wireless networks, and hence on potentialManagement for Wireless Networks. Artech House Publishers,

  20. Energy Efficient Distributed Data Fusion In Multihop Wireless Sensor Networks

    E-Print Network [OSTI]

    Huang, Yi

    2010-01-01T23:59:59.000Z

    processing for a wireless sensor networks. Each circle ’S’techniques in wireless sensor networks: A survey,” IEEEestimation for wireless sensor networks, part i: Gaussian

  1. Improving the performance of distributed simulations of wireless sensor networks

    E-Print Network [OSTI]

    Jin, Zhong-Yi

    2010-01-01T23:59:59.000Z

    Overview of Wireless Sensor Networks . . 2.1.2 Difficultiesin parallel a wireless sensor network with two duty cycledin parallel a wireless sensor network with three nodes that

  2. Scalable Coverage Maintenance for Dense Wireless Sensor Networks

    E-Print Network [OSTI]

    Lu, Jun; Wang, Jinsu; Suda, Tatsuya

    2007-01-01T23:59:59.000Z

    get coverage in wireless sensor networks,” in Proceedings ofscheme for large wireless sensor networks,” in Pro- ceedingsWorkshop on Wireless Sensor Networks and Applications (

  3. Cubic-based 3-D Localization for Wireless Sensor Networks

    E-Print Network [OSTI]

    Shwe, Hnin Yu; Chong, Peter HJ

    2013-01-01T23:59:59.000Z

    Scheme in Stereo Wireless Sensor Networks,” in Advances infor mobile wireless sensor networks," Ad Hoc Networks, vol.and B. D. O. Anderson, "Wireless sensor network localization

  4. Data-driven modeling of phenomena in wireless sensor networks

    E-Print Network [OSTI]

    Kamthe, Ankur U.

    2012-01-01T23:59:59.000Z

    experimentation in wireless sensor networks. Commun. ACM,of Phenomena in Wireless Sensor Networks A dissertationBoavida, editors, Wireless Sensor Networks, volume 5970 of

  5. Decentralized TDOA Sensor Pairing in Multihop Wireless Sensor Networks

    E-Print Network [OSTI]

    Meng, Wei; Lihua, Xie; Wendong, Xiao

    2013-01-01T23:59:59.000Z

    localization in wireless sensor networks,” IEEE Signallocalization in wireless sensor networks,” IEEE Trans.techniques for wireless sensor networks: A survey,” IEEE

  6. Reliable and Efficient Programming Abstractions for Wireless Sensor Networks

    E-Print Network [OSTI]

    Kothari, Nupur; Gummadi, Ramakrishna; Millstein, Todd; Govindan, Ramesh

    2007-01-01T23:59:59.000Z

    Macro-programming wireless sensor networks using Kairos. InAbstractions for Wireless Sensor Networks Nupur Kothari ?Keywords Wireless Sensor Networks, Macroprogramming, En-

  7. A mobile-agent based wireless sensing network for structural monitoring applications

    SciTech Connect (OSTI)

    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

    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.

  8. Digital ADCs and ultra-wideband RF circuits for energy constrained wireless applications by Denis Clarke Daly.

    E-Print Network [OSTI]

    Daly, Denis Clarke

    2009-01-01T23:59:59.000Z

    Ongoing advances in semiconductor technology have enabled a multitude of portable, low power devices like cellular phones and wireless sensors. Most recently, as transistor device geometries reach the nanometer scale, ...

  9. Self organization of wireless sensor networks using ultra-wideband radios

    DOE Patents [OSTI]

    Dowla, Farid U. (Castro Valley, CA); Nekoogar, Franak (San Ramon, CA); Spiridon, Alex (Palo Alto, CA)

    2009-06-16T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Dai, Lillian Lei, 1978-

    2008-01-01T23:59:59.000Z

    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 ...

  11. Available transfer capability and first order sensitivity

    SciTech Connect (OSTI)

    Gravener, M.H. [PJM Interconnection, L.L.C., Valley Forge, PA (United States)] [PJM Interconnection, L.L.C., Valley Forge, PA (United States); Nwankpa, C. [Drexel Univ., Philadelphia, PA (United States)] [Drexel Univ., Philadelphia, PA (United States)

    1999-05-01T23:59:59.000Z

    A method of calculating Available Transfer Capability and the exploration of the first order effects of certain power system network variables are described. The Federal Energy Regulatory Commission has ordered that bulk electrical control areas must provide to market participants a ``commercially viable`` network transfer capability for the import, export, and through-put of energy. A practical method for deriving this transfer capability utilizing both linear and non-linear power flow analysis methods is developed that acknowledges both thermal and voltage system limitations. The Available Transfer Capability is the incremental transfer capability derived by the method reduced by margins. A procedure for quantifying the first order effect of network uncertainties such as load forecast error and simultaneous transfers on the calculated transfer capability of a power system snapshot are explored. The quantification of these network uncertainties can provide information necessary for system operation, planning, and energy market participation.

  12. Power Control Using Stochastic Measurements \\Lambda

    E-Print Network [OSTI]

    Ulukus, Sennur

    Power Control Using Stochastic Measurements \\Lambda Sennur Ulukus Roy D. Yates Department@winlab.rutgers.edu Abstract For wireless communication systems, iterative power control algorithms have been proposed an iterative, distributed power control algorithm in which each user needs only to know its own channel gain

  13. Demonstrating Dynamic Wireless Charging of an Electric Vehicle - The benefit of Electrochemical Capacitor Smoothing

    SciTech Connect (OSTI)

    Miller (JNJ), John M. [JNJ-Miller PLC] [JNJ-Miller PLC; Onar, Omer C [ORNL] [ORNL; White, Cliff P [ORNL] [ORNL; Campbell, Steven L [ORNL] [ORNL; Coomer, Chester [ORNL] [ORNL; Seiber, Larry Eugene [ORNL] [ORNL; Sepe, Raymond B [ORNL] [ORNL; Steyerl, Anton [ORNL] [ORNL

    2014-01-01T23:59:59.000Z

    The wireless charging of an electric vehicle (EV) while it is in motion presents challenges in terms of low-latency communications for roadway coil excitation sequencing and maintenance of lateral alignment, plus the need for power-flow smoothing. This article summarizes the experimental results on power smoothing of in-motion wireless EV charging performed at the Oak Ridge National Laboratory (ORNL) using various combinations of electrochemical capacitors at the grid side and in the vehicle. Electrochemical capacitors of the symmetric carbon carbon type from Maxwell Technologies comprised the in-vehicle smoothing of wireless charging current to the EV battery pack. Electro Standards Laboratories (ESL) fabricated the passive and active parallel lithium-capacitor (LiC) unit used to smooth the grid-side power. The power pulsation reduction was 81% on the grid by the LiC, and 84% on the vehicle for both the LiC and the carbon ultracapacitors (UCs).

  14. SecSens -Security Architecture for Wireless Sensor Networks Faruk Bagci, Theo Ungerer

    E-Print Network [OSTI]

    Ungerer, Theo

    of sensor boards. Keywords: wireless sensor network, security architec- ture, energy efficiency, multi between nodes enhances communication flexibility. Generally, sensor nodes have limited energy and re not be transferred to sensor networks. In recent years, the research was mainly focused on issues related to energy

  15. 1 INTRODUCTION Wireless sensor networks tailored for structural

    E-Print Network [OSTI]

    Lynch, Jerome P.

    1 INTRODUCTION Wireless sensor networks tailored for structural monitoring applications have grown motivated researchers to explore wireless sensor networks for structural monitoring applications. Wireless in popularity since their initial introduction in the mid-1990s. Wireless sensors have the potential

  16. Wireless device monitoring methods, wireless device monitoring systems, and articles of manufacture

    DOE Patents [OSTI]

    McCown, Steven H. (Rigby, ID); Derr, Kurt W. (Idaho Falls, ID); Rohde, Kenneth W. (Idaho Falls, ID)

    2012-05-08T23:59:59.000Z

    Wireless device monitoring methods, wireless device monitoring systems, and articles of manufacture are described. According to one embodiment, a wireless device monitoring method includes accessing device configuration information of a wireless device present at a secure area, wherein the device configuration information comprises information regarding a configuration of the wireless device, accessing stored information corresponding to the wireless device, wherein the stored information comprises information regarding the configuration of the wireless device, comparing the device configuration information with the stored information, and indicating the wireless device as one of authorized and unauthorized for presence at the secure area using the comparing.

  17. 978-1-4244-7265-9/10/$26.00 c 2010 IEEE PCAR: A Power Controlled Routing Protocol for

    E-Print Network [OSTI]

    Wu, Jie

    978-1-4244-7265-9/10/$26.00 c 2010 IEEE PCAR: A Power Controlled Routing Protocol for Wireless Ad University Philadelphia, PA 19122, USA Abstract--Power control and routing are two fundamental supporting techniques for wireless communications in ad hoc networks. However, most existing power control and routing

  18. IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 50, NO. 9, SEPTEMBER 2002 1535 Error Statistics for Average Power Measurements in

    E-Print Network [OSTI]

    Wei, Shuangqing

    for Average Power Measurements in Wireless Communication Systems Shuangqing Wei, Student Member, IEEE, and Dennis L. Goeckel, Member, IEEE Abstract--The measurement of the average received power is essential for power control and dynamic channel allocation in wireless communication systems. However, due

  19. Constructing Minimum-Energy Broadcast Trees In Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Liang, Weifa

    algorithm, power awareness, ad hoc networks, energy consumption optimization, broad- cast and multicastConstructing Minimum-Energy Broadcast Trees In Wireless Ad Hoc Networks Weifa Liang Department related to power consump- tion in this kind of network. One is the minimum-energy broadcast tree problem

  20. Efficient and Secure Wireless Communications for Advanced Metering Infrastructure in Smart Grids

    E-Print Network [OSTI]

    Qiu, Robert Caiming

    1 Efficient and Secure Wireless Communications for Advanced Metering Infrastructure in Smart Grids metering infrastructure (AMI) [3] is a key task in smart grid [6] [4]. In such a system, each power user is equipped with a smart meter with the capability of two- way communications, which can monitor the power

  1. Optimal Traffic-Oblivious Energy-Aware Routing For Multihop Wireless Networks

    E-Print Network [OSTI]

    Holte, Robert

    constraints. If the power supply is renewable, it is desirable that the energy consumption rate is less than the renewal rate. Lin et al. [15] study power-aware routing with renewable energy sources. Some previous workOptimal Traffic-Oblivious Energy-Aware Routing For Multihop Wireless Networks Yuxi Li Janelle Harms

  2. Demand-scalable geographic multicasting in wireless sensor networks Shibo Wu *, K. Selcuk Candan

    E-Print Network [OSTI]

    Candan, Selçuk

    schemes for situations where scalable transmission paths can save power. In particular, we propose distributed and scalable manner. Furthermore, to save power of the sensors and routing nodes, networkDemand-scalable geographic multicasting in wireless sensor networks Shibo Wu *, K. Selc¸uk Candan

  3. Energy-Efficient Modulation Design for Reliable Communication in Wireless Networks

    E-Print Network [OSTI]

    Gursoy, Mustafa Cenk

    Energy-Efficient Modulation Design for Reliable Communication in Wireless Networks Qing Chen transmit power scenarios. We have noted that variable power schemes can attain higher energy-efficiencies. The analysis of energy-efficient modulation design is also conducted in multi- hop linear networks

  4. A Battery-Free Tag for Wireless Monitoring of Heart Sounds

    E-Print Network [OSTI]

    Sarpeshkar, Rahul

    A Battery-Free Tag for Wireless Monitoring of Heart Sounds Soumyajit Mandal, Lorenzo Turicchia that monitors heart sounds. The tag powers up by harvesting ambient RF energy, and contains a low measure heart rate at distances up to 7m from an FCC-compliant RF power source. We also suggest how delays

  5. Maximizing the Number of Broadcast Operations in Random Geometric Ad-Hoc Wireless Networks

    E-Print Network [OSTI]

    Calamoneri, Tiziana

    static ad-hoc wireless networks whose nodes, equipped with the same initial battery charge, may dynamically change their transmission range. When a node v transmits with range r(v), its battery charge of a node depends, in turn, on the energy power supplied to the node. In particular, the power Pv required

  6. Energy-Efficient Platform Designs for Real-World Wireless Sensing Applications

    E-Print Network [OSTI]

    Shinozuka, Masanobu

    Unit Scheduler Power Mgr Driver Calib. PowerReg.&Distr.Switch windmill solar panel battery other the trade-offs of sensing devices, wireless interfaces, and computation and control units. We also cover Controller mod Sensor + Detector ADC /det Reference Loc. Sens. Sensing Unit Processing Unit Communication

  7. 1Center for Wireless Technology Eindhoven Where innovation starts

    E-Print Network [OSTI]

    Franssen, Michael

    1Center for Wireless Technology Eindhoven Where innovation starts Department of Electrical Engineering Center for Wireless Technology Eindhoven #12;2 3Center for Wireless Technology Eindhoven Wireless Technology Eindhoven The Center for Wireless Technology The recent establishment of the Center for Wireless

  8. IEEE Wireless Communications December 201366 1536-1284/13/$25.00 2013 IEEE ACCEPTED FROM OPEN CALL

    E-Print Network [OSTI]

    Zhang, Yan

    power grid into the future "Internet of energy." The conventional centrally controlled electrical grid power line and one wireless communication link. The LAG is part of the electricity distribution infra CALL INTRODUCTION The smart grid is the next-generation power grid that will transform the traditional

  9. Utility-Based Wireless Resource Allocation for Variable Rate Transmission

    E-Print Network [OSTI]

    Zhang, Xiaolu; Ng, Chun Sum

    2007-01-01T23:59:59.000Z

    For most wireless services with variable rate transmission, both average rate and rate oscillation are important performance metrics. The traditional performance criterion, utility of average transmission rate, boosts the average rate but also results in high rate oscillations. We introduce a utility function of instantaneous transmission rates. It is capable of facilitating the resource allocation with flexible combinations of average rate and rate oscillation. Based on the new utility, we consider the time and power allocation in a time-shared wireless network. Two adaptation policies are developed, namely, time sharing (TS) and joint time sharing and power control (JTPC). An extension to quantized time sharing with limited channel feedback (QTSL) for practical systems is also discussed. Simulation results show that by controlling the concavity of the utility function, a tradeoff between the average rate and rate oscillation can be easily made.

  10. AQuaFWiN: Adaptive QoS Framework for Multimedia in Wireless Networks and its Comparison with other QoS Frameworks

    E-Print Network [OSTI]

    Jain, Raj

    . The architectures discussed are WAMIS (wireless adaptive multimedia information system), SWAN (seamless wireless ATM be made during connection setup to support end-to-end QoS guarantees. At the network layer techniques are respected and QoS guarantees can be supported. Adaptive power control techniques can be used to manage

  11. A Low-Power Correlation Detector For Binary FSK Direct-Conversion Receivers

    E-Print Network [OSTI]

    Arslan, HĂĽseyin

    A Low-Power Correlation Detector For Binary FSK Direct-Conversion Receivers J. Min, H-C. Liu, A detector, Tone detection, Correlation, Direct-conversion wireless receivers Abstract A multiplierless-suited for low-power direct-conversion receivers used in wireless communications systems employ- ing FSK

  12. High flux heat transfer in a target environment

    E-Print Network [OSTI]

    McDonald, Kirk

    High flux heat transfer in a target environment T. Davenne High Power Targets Group Rutherford Valid for: Consider turbulent heat transfer in a 1.5mm diameter pipe ­ Dittus Boelter correlation Achenbach correlation for heat transfer in a packed bed of spheres Max power density for a sphere

  13. Cooperative multicast in wireless networks

    E-Print Network [OSTI]

    Li, Fulu, 1970-

    2005-01-01T23:59:59.000Z

    Wireless communication has fundamental impairments due to multi-path fading, attenuation, reflections, obstructions, and noise. More importantly, it has historically been designed to mimic a physical wire; in concept other ...

  14. Effect of Mobility on Power Control and System Capacity

    E-Print Network [OSTI]

    Kumar, Anurag

    Effect of Mobility on Power Control and System Capacity in CDMA Cellular Wireless Networks Munish control, admission control and user mobility. We compare two methods for power control: Constant Re­ ceived Power Control (CRPC) in which the total power received at each base station (BS) is kept constant

  15. Closing the Loop over Wireless Networks:Closing the Loop over Wireless Networks: Fundamentals and Applications

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    4/9/2008 1 Closing the Loop over Wireless Networks:Closing the Loop over Wireless Networks Johansson, Pan Gun Park, Emmanuel Witrant Closing the Loop over Wireless Networks:Closing the Loop over Wireless Networks: Fundamentals and Applications Karl H. Johansson Electrical Engineering, Royal Institute

  16. Nanoscale Triboelectric-Effect-Enabled Energy Conversion for Sustainably Powering Portable Electronics

    E-Print Network [OSTI]

    Wang, Zhong L.

    Nanoscale Triboelectric-Effect-Enabled Energy Conversion for Sustainably Powering Portable: Harvesting energy from our living environment is an effective approach for sustainable, maintenance-free, and green power source for wireless, portable, or implanted electronics. Mechanical energy scavenging based

  17. Wireless Josephson amplifier

    SciTech Connect (OSTI)

    Narla, A.; Sliwa, K. M.; Hatridge, M.; Shankar, S.; Frunzio, L.; Schoelkopf, R. J.; Devoret, M. H. [Department of Applied Physics, Yale University, New Haven, Connecticut 06511 (United States)

    2014-06-09T23:59:59.000Z

    Josephson junction parametric amplifiers are playing a crucial role in the readout chain in superconducting quantum information experiments. However, their integration with current 3D cavity implementations poses the problem of transitioning between waveguide, coax cables, and planar circuits. Moreover, Josephson amplifiers require auxiliary microwave components, like directional couplers and/or hybrids, that are sources of spurious losses and impedance mismatches that limit measurement efficiency and amplifier tunability. We have developed a wireless architecture for these parametric amplifiers that eliminates superfluous microwave components and interconnects. This greatly simplifies their assembly and integration into experiments. We present an experimental realization of such a device operating in the 9–11?GHz band with about 100?MHz of amplitude gain-bandwidth product, on par with devices mounted in conventional sample holders. The simpler impedance environment presented to the amplifier also results in increased amplifier tunability.

  18. A miniature, implantable wireless neural stimulation system

    E-Print Network [OSTI]

    Arfin, Scott K. (Scott Kenneth)

    2006-01-01T23:59:59.000Z

    In this thesis, I present the design of a wireless neural stimulation system. The system consists of an external transmitter, controllable through a computer interface, and a miniature, implantable wireless receiver and ...

  19. Network coding for robust wireless networks

    E-Print Network [OSTI]

    Kim, MinJi, Ph. D. Massachusetts Institute of Technology

    2012-01-01T23:59:59.000Z

    Wireless networks and communications promise to allow improved access to services and information, ubiquitous connectivity, and mobility. However, current wireless networks are not well-equipped to meet the high bandwidth ...

  20. Energy and quality scalable wireless communication

    E-Print Network [OSTI]

    Min, Rex K. (Rex Kee), 1976-

    2003-01-01T23:59:59.000Z

    Nodes for emerging, high-density wireless networks will face the dual challenges of continuous, multi-year operation under diverse and challenging operating conditions. The wireless communication subsystem, a substantial ...

  1. Improving performance of TCP over wireless networks

    E-Print Network [OSTI]

    Mehta, Miten N.

    1998-01-01T23:59:59.000Z

    TCP has been designed and tuned to perform well on a phics. wired network made up of links with low bit-error rates. Wireless networks and heterogeneous networks consisting of wired and wireless links have many different characteristics compared...

  2. Wilis: Architectural Modeling of Wireless Systems

    E-Print Network [OSTI]

    Fleming, Kermin Elliott

    The performance of a wireless system depends on the wireless channel as well as the algorithms used in the transceiver pipelines. Because physical phenomena affect transceiver pipelines in difficult to predict ways, detailed ...

  3. Efficient wireless non-radiative mid-range energy transfer

    E-Print Network [OSTI]

    Soljaèiæ, Marin

    -wire grid was deployed, seri- ous interest and effort was devoted (most notably by Nikola Tesla [1]) towards storage) justifies revisiting investigation of this issue. Today, we face a different challenge than Tesla

  4. Hydrodynamics, heat transfer and flow boiling instabilities in microchannels 

    E-Print Network [OSTI]

    Barber, Jacqueline Claire

    2010-01-01T23:59:59.000Z

    Boiling in microchannels is a very efficient mode of heat transfer with high heat and mass transfer coefficients achieved. Less pumping power is required for two-phase flows than for single-phase liquid flows to achieve ...

  5. Wireless device monitoring systems and monitoring devices, and associated methods

    DOE Patents [OSTI]

    McCown, Steven H; Derr, Kurt W; Rohde, Kenneth W

    2014-05-27T23:59:59.000Z

    Wireless device monitoring systems and monitoring devices include a communications module for receiving wireless communications of a wireless device. Processing circuitry is coupled with the communications module and configured to process the wireless communications to determine whether the wireless device is authorized or unauthorized to be present at the monitored area based on identification information of the wireless device. Methods of monitoring for the presence and identity of wireless devices are also provided.

  6. EEL 6591: Wireless Networks Spring 2014

    E-Print Network [OSTI]

    Latchman, Haniph A.

    EEL 6591: Wireless Networks Spring 2014 Instructor: Professor Yuguang "Michael" Fang Contact: 435-Hall, 2002. References: 1. Broadband Wireless Multimedia Networks by Benny Bing, John Wiley, 2013. 2. Wireless and Mobile Network Architecture by Yi-Bing Lin and Imrich Chlamtac, John Wiley & Sons, 2000. 3

  7. Radioactive Target Detection Using Wireless Sensor Network

    E-Print Network [OSTI]

    Zhang, Tonglin

    Chapter 31 Radioactive Target Detection Using Wireless Sensor Network Tonglin Zhang Abstract for wireless sensor network data to detect and locate a hidden nuclear target in a large study area. The method assumes multiple radiation detectors have been used as sensor nodes in a wireless sensor network

  8. Gradient Clock Synchronization in Wireless Sensor Networks

    E-Print Network [OSTI]

    Gradient Clock Synchronization in Wireless Sensor Networks Philipp Sommer Computer Engineering- olution. Without doubt, time is a first-class citizen in wireless sensor networks. Without accurate time if the nodes in the wireless sensor network manage to have an adequate agreement of time. Indeed

  9. Optimal Deployment of Impromptu Wireless Sensor Networks

    E-Print Network [OSTI]

    Kumar, Anurag

    Optimal Deployment of Impromptu Wireless Sensor Networks Prasenjit Mondal, K. P. Naveen and Anurag to deploy sensors (such as motion sensors, or even imaging sensors) and a wireless interconnection network an impromptu deploy- ment of a wireless sensor network in a building. Fig. 2. Problem studied in this paper

  10. Distributed A Wireless Sensor Network for

    E-Print Network [OSTI]

    Distributed Computing A Wireless Sensor Network for Orienteering Competitions Master's Thesis-wave Monopole Antennas . . . . . . . . . . . . . 13 5 MAC and Routing in Wireless Sensor Networks 14 5.1 Medium and waterproof cases free of charge. i #12;Abstract This thesis deals with the development of a wireless sensor

  11. A Virtual Infrastructure for Wireless Sensor Networks

    E-Print Network [OSTI]

    Stojmenovic, Ivan

    &CHAPTER 4 A Virtual Infrastructure for Wireless Sensor Networks STEPHAN OLARIU and QINGWEN XU Old, and wireless communications 107 Handbook of Sensor Networks: Algorithms and Architectures, Edited by I and communication infra- structures, called wireless sensor networks, will have a significant impact on a wide array

  12. TESLA'S VISION OF THE WIRELESS GLOBAL COMMUNICATIONS

    E-Print Network [OSTI]

    Trajkovic, Ljiljana

    of Nikola Tesla #12;January 17, 2005 UBC Ljiljana Trajkovic, Simon Fraser University 9 Wireless patentsTESLA'S VISION OF THE WIRELESS GLOBAL COMMUNICATIONS Ljiljana Trajkovi Communication Networks;January 17, 2005 UBC Ljiljana Trajkovic, Simon Fraser University 2 Road map Tesla in 1890's First wireless

  13. MINIMUM POWER SYMMETRIC CONNECTIVITY PROBLEM IN

    E-Print Network [OSTI]

    Gambardella, Luca Maria

    of assigning transmission powers to the nodes of a wireless network in such a way that all the nodes-hop transmission if the recipient is within the transmission range of the source node, or by relaying through control essentially involves choosing the right set of transmitter power to maintain ade- quate network

  14. Summary Report for Concentrating Solar Power Thermal Storage Workshop: New Concepts and Materials for Thermal Energy Storage and Heat-Transfer Fluids, May 20, 2011

    SciTech Connect (OSTI)

    Glatzmaier, G.

    2011-08-01T23:59:59.000Z

    This document summarizes a workshop on thermal energy storage for concentrating solar power (CSP) that was held in Golden, Colorado, on May 20, 2011. The event was hosted by the U.S. Department of Energy (DOE), the National Renewable Energy Laboratory, and Sandia National Laboratories. The objective was to engage the university and laboratory research communities to identify and define research directions for developing new high-temperature materials and systems that advance thermal energy storage for CSP technologies. This workshop was motivated, in part, by the DOE SunShot Initiative, which sets a very aggressive cost goal for CSP technologies -- a levelized cost of energy of 6 cents per kilowatt-hour by 2020 with no incentives or credits.

  15. The effects of user mobility on usage parameter control (UPC) in wireless ATM systems

    SciTech Connect (OSTI)

    Sholander, P.; Martinez, L.; Tolendino, L. [Sandia National Labs., Albuquerque, NM (United States); Mah, B.A. [Sandia National Labs., Livermore, CA (United States)

    1997-07-01T23:59:59.000Z

    Wireless Asynchronous Transfer Mode (WATM) networks pose new traffic management problems. One example is the effect of user mobility on Usage Parameter Control (UPC). If the UPC algorithm resets after each handoff between wireless-cells, then users can cheat on their traffic contract. This paper derives explicit relationships between a user`s traffic parameters (Peak Cell Rate, Sustained Cell Rate and Maximum Burst Size), their transit time per wireless-cell, their maximum sustained cheating-rate and the Generic Cell Rate Algorithm`s (GCRA`s) Limit (L) parameter. It also shows that the GCRA can still effectively police Constant Bit Rate (CBR) traffic, but not some types of realistic Variable Bit Rate (VBR) traffic.

  16. Opportunistic Source Coding for Data Gathering in Wireless Sensor Networks

    E-Print Network [OSTI]

    1 Opportunistic Source Coding for Data Gathering in Wireless Sensor Networks Tao Cui, Lijun Chen capacity of multihop wireless networks, an important topic addressed by wireless sensor networks community for correlated data gathering in wireless sensor networks, which ex- ploits the broadcast nature of wireless

  17. Dynamic Wireless Charging of Electric Vehicle Demonstrated at Oak Ridge National Laboratory: Benefit of Electrochemical Capacitor Smoothing

    SciTech Connect (OSTI)

    Miller, John M [ORNL] [ORNL; Onar, Omer C [ORNL] [ORNL; White, Cliff P [ORNL] [ORNL; Campbell, Steven L [ORNL] [ORNL; Coomer, Chester [ORNL] [ORNL; Seiber, Larry Eugene [ORNL] [ORNL

    2014-01-01T23:59:59.000Z

    Abstract Wireless charging of an electric vehicle while in motion presents challenges in terms of low latency communications for roadway coil excitation sequencing, and maintenance of lateral alignment, plus the need for power flow smoothing. This paper summarizes the experimental results on power smoothing of in-motion wireless EV charging performed at Oak Ridge National Laboratory using various combinations of electrochemical capacitors at the grid-side and in-vehicle. Electrochemical capacitors of the symmetric carbon-carbon type from Maxwell Technologies comprised the in-vehicle smoothing of wireless charging current to the EV battery pack. Electro Standards Laboratories fabricated the passive and active parallel lithium-capacitor unit used to smooth grid-side power. Power pulsation reduction was 81% on grid by LiC, and 84% on vehicle for both lithium-capacitor and the carbon ultracapacitors.

  18. NSF Workshop on Available Transfer Capability, Urbana IL, USA, June 1997 INITIAL CONCEPTS FOR APPLYING SENSITIVITY TO

    E-Print Network [OSTI]

    of the experience in computing transfer ca- pabilities concerns line #ow limits and uses DC load #ow power system case with a loading and transfer schedule at which the power system is secure. The base transfer transfer is in- creased, the power system state evolves and eventually some security criterion is violated

  19. Characterization and Development of Advanced Heat Transfer Technologie...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    May 18-22, 2009 -- Washington D.C. ape11kelly.pdf More Documents & Publications Characterization and Development of Advanced Heat Transfer Technologies Advanced Power Electronics...

  20. Wireless technology for integrated manufacturing

    SciTech Connect (OSTI)

    Manges, W.W.; Allgood, G.O.; Shourbaji, A.A.

    1996-08-01T23:59:59.000Z

    This paper describes the ground breaking work in Oak Ridge facilities that now leads us to the brink of the wireless revolution in manufacturing. The focus is on solving tough technological problems necessary for success and addressing the critical issues of throughput, security, reliability, and robustness in applying wireless technology to manufacturing processes. Innovative solutions to these problems are highlighted through detailed designs and testbed implementations that demonstrate key concepts. The DOE-Oak Ridge complex represented by the Oak Ridge Centers for Manufacturing Technologies (ORCMT) continues to develop these technologies and will continue to focus on solving tough manufacturing problems.

  1. WIRELESS FOR A NUCLEAR FACILITY

    SciTech Connect (OSTI)

    Shull, D; Joe Cordaro, J

    2007-03-28T23:59:59.000Z

    The introduction of wireless technology into a government site where nuclear material is processed and stored brings new meaning to the term ''harsh environment''. At SRNL, we are attempting to address not only the harsh RF and harsh physical environment common to industrial facilities, but also the ''harsh'' regulatory environment necessitated by the nature of the business at our site. We will discuss our concepts, processes, and expected outcomes in our attempts to surmount the roadblocks and reap the benefits of wireless in our ''factory''.

  2. Energy-efficient wireless communication In this chapter we present an energy-efficient highly adaptive network

    E-Print Network [OSTI]

    Havinga, Paul J.M.

    Energy-efficient wireless communication In this chapter we present an energy-efficient highly substantial research in the hardware aspects of mobile communications energy-efficiency, such as low-power electronics, power-down modes, and energy efficient modulation. However, due to fundamental physical

  3. 1634 IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL. 12, 2013 A Compact Dual-Band Rectenna Using Slot-Loaded

    E-Print Network [OSTI]

    Tentzeris, Manos

    , dual-band rectenna, dual-band rectifier, energy harvesting, wireless power transmission. I bands, RF energy harvesters capable of operating in multiple bands are of great importance. Nowadays by a microwave signal of available power of 9 dBm for a load resistor of 2.2 k . Index Terms--Dipole antenna

  4. Power Control for Mobile Sensor Networks: An Experimental Approach

    E-Print Network [OSTI]

    Amir, Yair

    Power Control for Mobile Sensor Networks: An Experimental Approach JeongGil Ko Department--Techniques for controlling the transmission power of wireless mobile devices have been widely studied in ad-hoc and cellular characteristics of these networks, such as severe resource constraints, suggest that transmission power control

  5. Power Control for an Asynchronous Multirate Decorrelator \\Lambda

    E-Print Network [OSTI]

    Yates, Roy

    Power Control for an Asynchronous Multi­rate Decorrelator \\Lambda Mohammad Saquib ECE Dept) requirements of multimedia traffic require the use of power control for CDMA wireless systems employing on individual requirements. In this context, we propose a power control algorithm for a multi­rate decorrelator

  6. Pricing for Uplink Power Control in Cognitive Radio Networks

    E-Print Network [OSTI]

    Wang, Xinbing

    1 Pricing for Uplink Power Control in Cognitive Radio Networks Hui Yu, Lin Gao, Zheng Li, Xinbing of the proposed pricing scheme. Keywords: Cognitive radio, power control, non-cooperative game, profit management problems such as power control quite complicated. Wireless radio devices with "cognitive" ability

  7. Feedback-based Adaptation for Improved Power Consumption Christos Bouras

    E-Print Network [OSTI]

    Bouras, Christos

    networks. Power control is also developed for 802.11b wireless networks in [7]. This model operates between made it inefficient in real life implementation. The initial model manages to minimize the power treatments of the subject. [1] proposes a transmission control power algorithm and tests it with the ns-2 [2

  8. 802.11 Power Management Extensions to Monarch ns

    E-Print Network [OSTI]

    802.11 Power Management Extensions to Monarch ns John Dorsey and Dan Siewiorek December 2004 CMU. Our extensions add several management fea- tures needed for power management, such as beacon frames at the core of power management. A method for recording the energy con- sumption of the wireless interface

  9. 802.11 Power Management Extensions to Monarch ns

    E-Print Network [OSTI]

    802.11 Power Management Extensions to Monarch ns John Dorsey and Dan Siewiorek December 2004 CMU. Our extensions add several management fea­ tures needed for power management, such as beacon frames at the core of power management. Amethod for recording the energy con­ sumption of the wireless interface

  10. Low-power adaptive control scheme using switching activity measurement method for reconfigurable analog-to-digital converters 

    E-Print Network [OSTI]

    Ab Razak, Mohd Zulhakimi

    2014-06-30T23:59:59.000Z

    Power consumption is a critical issue for portable devices. The ever-increasing demand for multimode wireless applications and the growing concerns towards power-aware green technology make dynamically reconfigurable hardware an attractive solution...

  11. SUBMITTED TO IEEE TRANSACTIONS ON POWER SYSTEMS, FEBRUARY 2002 1 Quantifying Transmission Reliability Margin

    E-Print Network [OSTI]

    SUBMITTED TO IEEE TRANSACTIONS ON POWER SYSTEMS, FEBRUARY 2002 1 Quantifying Transmission, power transmission reliability, power system security, power system availability I. Introduction Bulk power transfer capability computations have many uses in electric power system operation and planning

  12. Wireless ad hoc networks Acknowledgement: Slides borrowed from Richard Y. Yang @ Yale

    E-Print Network [OSTI]

    Gao, Jie

    are not flexible. ­ Vulnerable to attacks. · Ad hoc networks· Ad hoc networks ­ Flexible, easy to deploy, cheaper · Optimal power assignment /transmission range · Optimal scheduling & multi-hop routing · Node are staticWireless ad hoc networks Acknowledgement: Slides borrowed from Richard Y. Yang @ Yale #12

  13. The Impact of Doppler Spreading on Delay Performance over Multi-hop Wireless Communications

    E-Print Network [OSTI]

    Haddadi, Hamed

    , such as larger transmission range, more frequency efficiency, flexible organizing and power saving, networks promising technologies to provide high data rate transmission through wireless link in multi-hop networks communications are very promising technologies for next generation network to provide high data rate transmission

  14. Energy-Balanced Cooperative Routing in Multihop Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Wang, Yu

    Energy-Balanced Cooperative Routing in Multihop Wireless Ad Hoc Networks Siyuan Chen Minsu Huang. In this paper, we aim to study the impact of cooperative routing on balancing the energy distribution among their transmission power, our cooperative routing method can balance the energy among neighboring nodes and maximize

  15. IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS (SUBMITTED) 1 On Energy Efficiency and Optimum Resource

    E-Print Network [OSTI]

    Yao, Yingwei

    of attention due to the emergence of wireless ad hoc links as a flexible network architecture capable the potential of supporting high data rate multimedia transmissions, while operating in the power-limited region Resource Allocation of Relay Transmissions Yingwei Yao, Xiaodong Cai, and Georgios B. Giannakis (contact

  16. HIERARCHICAL CENSORING FOR DISTRIBUTED DETECTION IN WIRELESS SENSOR Neal Patwari and Alfred O. Hero III

    E-Print Network [OSTI]

    Patwari, Neal

    management for long life- times. Many example applications, such as temperature and VOC monitoring maximizes system lifetime. If energy consumption can be sufficiently reduced, solar power or energy]@eecs.umich.edu. ABSTRACT In energy-limited wireless sensor networks, detection using `cen- soring sensors' reduces

  17. Body Area Networks & Pervasive Health Monitoring Recent advances in microelectronics and wireless

    E-Print Network [OSTI]

    , intelligent endoscope capsules, glucose monitors and eye pressure sensing systems. Similarly, wearable sensors the development of efficient energy-management protocols for low-power wearable medical sensors. · InterferenceBody Area Networks & Pervasive Health Monitoring Recent advances in microelectronics and wireless

  18. Energy Efficient Design of Portable Wireless Systems Tajana Simunic Haris Vikalo Peter Glynny Giovanni De Micheli

    E-Print Network [OSTI]

    Simunic, Tajana

    -operated portable systems demandtight constraints on energy consumption. Better low-power circuit design techniquesEnergy Efficient Design of Portable Wireless Systems Tajana Simunic Haris Vikalo Peter Glynny control (PC) of the wire- less link that enables us to obtain further energy savings when the system

  19. ENERGY-EFFICIENT MULTIMEDIA COMMUNICATIONS IN LOSSY MULTI-HOP WIRELESS NETWORKS

    E-Print Network [OSTI]

    Kravets, Robin

    ENERGY-EFFICIENT MULTIMEDIA COMMUNICATIONS IN LOSSY MULTI-HOP WIRELESS NETWORKS Al Harris, Cigdem is energy-efficiency due to battery- power constrained mobile nodes. The network interface is a significant to reduce the energy wasted by sending such useless data in lossy networks. Keywords: Energy-efficient

  20. Minimizing Energy Consumption in IR-UWB Based Wireless Sensor Networks

    E-Print Network [OSTI]

    Heinzelman, Wendi

    Minimizing Energy Consumption in IR-UWB Based Wireless Sensor Networks Tianqi Wang, Wendi communications systems, where transmit power can be flexibly adjusted to minimize the energy consumption [3] [4 Heinzelman and Alireza Seyedi Department of Electrical and Computer Engineering, University of Rochester

  1. Graphical modelling for simulation and formal analysis of wireless network protocols

    E-Print Network [OSTI]

    Oxford, University of

    , M. Fruth2 , and A. K. McIver3 1 National ICT Australia, Sydney, Australia; ansgar@nicta.com 2 University, NSW 2109 Australia, and National ICT Australia; anabel@ics.mq.edu.au Abstract. It is well networks. 1 Introduction Wireless networks comprise devices with limited computing power together

  2. Graphical modelling for simulation and formal analysis of wireless network protocols

    E-Print Network [OSTI]

    Jeavons, Peter

    , M. Fruth2 , and A. K. McIver3 1 National ICT Australia, Sydney, Australia; ansgar@nicta.com 2 School University, NSW 2109 Australia, and National ICT Australia; anabel@ics.mq.edu.au Abstract. The aim comprise devices with limited computing power together with wireless communication. Protocols

  3. Hierarchical Wireless Network Architecture for Distributed Applications Zeashan Hameed Khan

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Hierarchical Wireless Network Architecture for Distributed Applications Zeashan Hameed Khan Control-- This paper describes a hierarchical wireless network architecture for real time remote coordination, Distributed monitoring, QoS adaptation, Realtime coordination I. INTRODUCTION Wireless communication networks

  4. When Network Coding improves the Performances of Clustered Wireless Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    When Network Coding improves the Performances of Clustered Wireless Networks that significantly increases the performances of clustering algorithms in wireless multi-hop networks-XOR coding; wireless multi-hop networks; clustering I. INTRODUCTION Partitioning nodes

  5. Estimating Wireless Network Properties with Spatial Statistics and Models

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Estimating Wireless Network Properties with Spatial Statistics and Models Janne Riihij statistics and models for different estimation problems related to wireless networks. We focus specifically wireless networks. We provide a concise survey of existing techniques from the spatial statistics

  6. WIRELESS SENSOR NETWORK BASED CONTROL SYSTEM CONCIDERING COMMUNICATION COST

    E-Print Network [OSTI]

    WIRELESS SENSOR NETWORK BASED CONTROL SYSTEM CONCIDERING COMMUNICATION COST Yutaka Iino* Takeshi for wireless sensor network based control system, minimizing communication energy consumption. Some control, wireless sensor network technology has been developed rapidly, and various applications to control system

  7. Interference-Aware Fair Rate Control in Wireless Sensor Networks

    E-Print Network [OSTI]

    Rangwala, Sumit; Gummadi, Ramakrishna; Govindan, Ramesh; Psounis, Konstantinos

    2006-01-01T23:59:59.000Z

    Protocol For Wireless Sensor Networks. In WSNA ’02. [30]Congestion in Wireless Sensor Networks. In SenSys ’04. [12]Y. Lei. A Two-Tier Wireless Sensor Network Architecture for

  8. Tracking Multiple Targets Using Binary Decisions from Wireless Sensor Networks

    E-Print Network [OSTI]

    Michailidis, George

    Tracking Multiple Targets Using Binary Decisions from Wireless Sensor Networks Natallia Katenka- tions. 1 #12;Keywords: wireless sensor networks, binary data, target tracking, multiple targets, penal- ized maximum likelihood 1 Introduction and Problem Motivation Wireless Sensor Networks (WSN) have

  9. Data Analysis and Query Processing in Wireless Sensor Networks

    E-Print Network [OSTI]

    Chatzimilioudis, Georgios

    2010-01-01T23:59:59.000Z

    5.2.2 Wireless Sensor Networks . . . . . . . . 5.33.1 De?nition of a Wireless Sensor Network . . . . . . .1.1 Introduction to Wireless Sensor Networks 1.2 Motivating

  10. Wireless Technologies for Structural Wireless Technologies for Structural Health MonitoringHealth Monitoring

    E-Print Network [OSTI]

    Wireless Technologies for Structural Wireless Technologies for Structural Health MonitoringHealth responses · Structural monitoring structural health monitoring: ­ Very few structural "health" monitoring and buildings · Future directions and technology trends Structural Monitoring SystemsStructural Monitoring

  11. Wesleyan Guest Wireless connection procedure. Please follow the procedure below for connecting to the Wesleyan Guest Wireless network.

    E-Print Network [OSTI]

    Devoto, Stephen H.

    for connecting to the Wesleyan Guest Wireless network. Begin by selecting the Wireless icon in the lower rightWesleyan Guest Wireless connection procedure. Windows #12;Please follow the procedure below

  12. Multimode power processor

    DOE Patents [OSTI]

    O'Sullivan, George A. (Pottersville, NJ); O'Sullivan, Joseph A. (St. Louis, MO)

    1999-01-01T23:59:59.000Z

    In one embodiment, a power processor which operates in three modes: an inverter mode wherein power is delivered from a battery to an AC power grid or load; a battery charger mode wherein the battery is charged by a generator; and a parallel mode wherein the generator supplies power to the AC power grid or load in parallel with the battery. In the parallel mode, the system adapts to arbitrary non-linear loads. The power processor may operate on a per-phase basis wherein the load may be synthetically transferred from one phase to another by way of a bumpless transfer which causes no interruption of power to the load when transferring energy sources. Voltage transients and frequency transients delivered to the load when switching between the generator and battery sources are minimized, thereby providing an uninterruptible power supply. The power processor may be used as part of a hybrid electrical power source system which may contain, in one embodiment, a photovoltaic array, diesel engine, and battery power sources.

  13. Multimode power processor

    DOE Patents [OSTI]

    O'Sullivan, G.A.; O'Sullivan, J.A.

    1999-07-27T23:59:59.000Z

    In one embodiment, a power processor which operates in three modes: an inverter mode wherein power is delivered from a battery to an AC power grid or load; a battery charger mode wherein the battery is charged by a generator; and a parallel mode wherein the generator supplies power to the AC power grid or load in parallel with the battery. In the parallel mode, the system adapts to arbitrary non-linear loads. The power processor may operate on a per-phase basis wherein the load may be synthetically transferred from one phase to another by way of a bumpless transfer which causes no interruption of power to the load when transferring energy sources. Voltage transients and frequency transients delivered to the load when switching between the generator and battery sources are minimized, thereby providing an uninterruptible power supply. The power processor may be used as part of a hybrid electrical power source system which may contain, in one embodiment, a photovoltaic array, diesel engine, and battery power sources. 31 figs.

  14. ISA Approves Standard for Wireless Automation in Process Control...

    Energy Savers [EERE]

    ISA Approves Standard for Wireless Automation in Process Control Applications ISA Approves Standard for Wireless Automation in Process Control Applications On September 9, the...

  15. Wireless technology collects real-time information from oil and...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Wireless technology collects real-time information from oil and gas wells Wireless technology collects real-time information from oil and gas wells The patented system delivers...

  16. SoftCast: One Video to Serve All Wireless Receivers

    E-Print Network [OSTI]

    Katabi, Dina

    2009-02-07T23:59:59.000Z

    The main challenge in wireless video multicast is to scalably serve multiple receivers who have different channel characteristics. Current wireless transmission schemes, however, cannot support smooth degradation. Specifically, ...

  17. Radiative transfer in molecular lines

    E-Print Network [OSTI]

    A. Asensio Ramos; J. Trujillo Bueno; J. Cernicharo

    2001-02-15T23:59:59.000Z

    The highly convergent iterative methods developed by Trujillo Bueno and Fabiani Bendicho (1995) for radiative transfer (RT) applications are generalized to spherical symmetry with velocity fields. These RT methods are based on Jacobi, Gauss-Seidel (GS), and SOR iteration and they form the basis of a new NLTE multilevel transfer code for atomic and molecular lines. The benchmark tests carried out so far are presented and discussed. The main aim is to develop a number of powerful RT tools for the theoretical interpretation of molecular spectra.

  18. Power Factor Reactive Power

    E-Print Network [OSTI]

    motor power: 117.7 V x 5.1 A = 600 W? = 0.6 kW? NOT the power measured by meter #12;Page 9 PSERC: displacement power factor: angle between voltage and current = 0 degrees pf = cos(0 degrees) = 1.0 true powerPage 1 PSERC Power Factor and Reactive Power Ward Jewell Wichita State University Power Systems

  19. Electron Transfer

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField Campaign:INEAWater UseC Supports - Energy3 Pierre Kennepohl1,2 and

  20. TCPL: A Defense against wormhole attacks in wireless sensor networks

    SciTech Connect (OSTI)

    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

    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.