Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Saravanos, Yanos, Energy-Aware Time Synchronization in Wireless Sensor Networks Master of Science (Computer Science and Engineering), August 2006.
 

Summary: Saravanos, Yanos, Energy-Aware Time Synchronization in Wireless Sensor Networks
Master of Science (Computer Science and Engineering), August 2006.
We present a time synchronization scheme for wireless sensor networks that aims
to conserve sensor battery power while maintaining network connectivity for as long as
possible. The proposed method creates a hierarchical tree by flooding the sensor network
from a designated source point. It then uses a hybrid algorithm derived from the Timing-
sync Protocol for Sensor Networks (TSPN) and the Reference Broadcast Synchronization
method (RBS) to periodically synchronize sensor clocks by minimizing the number of
required transmissions.
In multi-hop ad-hoc networks, a depleted sensor will drop information from all
other sensors that route data through it, decreasing the physical area being monitored by
the network. It is therefore imperative that time synchronization schemes are aware of
the number of sensors being used at any given time. The proposed method uses several
techniques and thresholds to maintain network connectivity. A new source point is
chosen when the current one's battery power reaches a designated energy threshold. The
network is also re-flooded whenever the number of used sensors drops below another
threshold.
We implement this new synchronization technique on Matlab and show that it can
provide significant power savings over both TPSN and RBS; the power reduction is even
more drastic in large multi-hop sensor networks. The method also improves upon these

  

Source: Akl, Robert - Department of Computer Science and Engineering, University of North Texas

 

Collections: Computer Technologies and Information Sciences