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On the energy efficiency of cooperative communications in wireless sensor networks

Published:05 January 2010Publication History
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Abstract

Cooperative communications represent a potential candidate to combat the effects of channel fading and to increase the transmit energy efficiency in wireless sensor networks with the downside being the increased complexity. In sensor networks the power consumed in the receiving and processing circuitry can constitute a significant portion of the total consumed power. By taking into consideration such overhead, an analytical framework for studying the energy efficiency trade-off of cooperation in sensor networks is presented. This trade-off is shown to depend on several parameters such as the receive and processing power, the required quality-of-service, the power amplifier loss, and several other factors. The analytical and numerical results reveal that for small distance separation between the source and destination, direct transmission is more energy efficient than relaying. The results also reveal that equal power allocation performs as well as optimal power allocation for some scenarios. The effects of the relay location and the number of employed relays on energy efficiency are also investigated in this work. Moreover, there are experimental results conducted to verify the channel model assumed in the article.

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          cover image ACM Transactions on Sensor Networks
          ACM Transactions on Sensor Networks  Volume 6, Issue 1
          December 2009
          258 pages
          ISSN:1550-4859
          EISSN:1550-4867
          DOI:10.1145/1653760
          Issue’s Table of Contents

          Copyright © 2010 ACM

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          New York, NY, United States

          Publication History

          • Published: 5 January 2010
          • Revised: 1 January 2009
          • Accepted: 1 January 2009
          • Received: 1 November 2006
          Published in tosn Volume 6, Issue 1

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