Energy hole mitigation through cooperative transmission in wireless sensor networks

Li Fei, Yi Chen, Qiang Gao*, Xiao-Hong Peng, Qiong Li

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

The energy balancing capability of cooperative communication is utilized to solve the energy hole problem in wireless sensor networks. We first propose a cooperative transmission strategy, where intermediate nodes participate in two cooperative multi-input single-output (MISO) transmissions with the node at the previous hop and a selected node at the next hop, respectively. Then, we study the optimization problems for power allocation of the cooperative transmission strategy by examining two different approaches: network lifetime maximization (NLM) and energy consumption minimization (ECM). For NLM, the numerical optimal solution is derived and a searching algorithm for suboptimal solution is provided when the optimal solution does not exist. For ECM, a closed-form solution is obtained. Numerical and simulation results show that both the approaches have much longer network lifetime than SISO transmission strategies and other cooperative communication schemes. Moreover, NLM which features energy balancing outperforms ECM which focuses on energy efficiency, in the network lifetime sense.

Original languageEnglish
Article number757481
Number of pages14
JournalInternational Journal of Distributed Sensor Networks
Volume2015
DOIs
Publication statusPublished - Feb 2015

Bibliographical note

Copyright © 2015 Li Fei et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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