Power Control Based Topology Construction for Distributed Wireless Sensor Networks

Student thesis: Master's Thesis

Abstract

Wireless ad hoc sensor networks consist of small, autonomous sensor nodes. These nodes are able to communicate with each other, usually by using radio signals. Because of their restricted dimensions and cost the resources in these nodes are very limited. The energy supplies of these nodes are usually very small batteries and they are expected to operate for years. This calls for very effective and efficient techniques to save the energy in order to maximize the network lifetime. The greatest energy consumer in a wireless sensor node is the radio chip. By using the radio in an optimized way, one can achieve great lifetime improvements.
This thesis primarily focuses on evaluating and improving an energy-efficient routing protocol called the "Power Control Based Topology" and implementing this protocol in the Mobility Framework for OMNeT++ as well as exploring this framework for future use. Topology control implies that nodes should take decisions concerning energy savings from a global network point of view. The protocol is completely decentralized and the nodes only know about themselves and some neighbors (when they receive packets sent by these neighbors).
Through simulations in OMNeT++ and the Mobility Framework the functionality of this "Power Control Based Topology" is explained and the scalability, weaknesses, strong points and shortcomings are discussed and tested in many different configurations.
Finally, improvements to the Power Control Based Topology building protocol are proposed and evaluated.
Date of Award2007
Original languageEnglish
SupervisorKris Steenhaut (Promotor), Ann Nowe (Promotor) & Hugues Smeets (Advisor)

Keywords

  • wireless sensor networks
  • sensor nodes
  • energy efficiency
  • OMNeT++
  • Mobility Framework
  • power control
  • topology control
  • tree topology
  • routing

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