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Balancing Overhearing Energy and Latency in Wireless Sensor Networks

  • Byoungyong Lee
  • Kyungseo Park
  • Ramez Elmasri
Part of the IFIP – The International Federation for Information Processing book series (IFIPAICT, volume 264)

Abstract

A WSN (Wireless Sensor Networks) consists of a large number of sensor nodes. Each sensor node has limited battery, small storage, and short radio range. Many researchers have proposed various methods to reduce energy consumption in sensor nodes, since it is difficult to replace sensor node power sources. Generally, a sensor node consumes its energy during processing, receiving, transmitting and overhearing of messages that are directed to other nodes. Among those, overhearing is not necessary for correct operation of sensor networks. In this paper we propose a new synchronized wakeup scheme to reduce the overhearing energy consumption using different wakeup time scheduling for extending sensor network lifetime. The results of our simulation show that there is a trade-off between reducing overhearing energy and delay time. Therefore we propose Double Trees Structure, called DTS, having two routing trees, one based on Short Rings Topology and the other on Long Rings Topology. DTS has multi routing paths from base station to children nodes. If a node which is on the next routing path does not wakeup in time to receive the data, the sender node selects another path to connect to the destination. We can save the wait time until the next destination node wakes up. In the simulation result, our wakeup scheduling reduces overhearing energy consumption more than the S-MAC protocol. Using the double trees structure reduces the delay time.

Keywords

Sensor Network Wakeup Scheduling Overhearing Energy. 

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Copyright information

© IFIP International Federation for Information Processing 2008

Authors and Affiliations

  • Byoungyong Lee
    • 1
  • Kyungseo Park
    • 1
  • Ramez Elmasri
    • 1
  1. 1.Computer Science & Engineering DepartmentUniversity of Texas at ArlingtonArlingtonUSA

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