Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (3): 37-42.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Opportunistic Relaying Strategy for Prolonging Network Lifetime Based on Power Weighting

Ke Feng1  Geng Heng-xin1  Feng Sui-li1  Jiang Ming2   

  1. 1．School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China; 2．New Postcom Equipment Co. ,Ltd. ,Guangzhou 510663,Guangdong,China
  • Received:2011-07-19 Revised:2011-12-11 Online:2012-03-25 Published:2012-02-01
  • Contact: 柯峰(1975-) ，男，博士，副教授，主要从事宽带移动通信研究． E-mail:fengke@scut.edu.cn
  • About author:柯峰(1975-) ，男，博士，副教授，主要从事宽带移动通信研究．
  • Supported by:

    国家自然科学基金资助项目( 61001113)

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Abstract:

Proposed in this paper is an opportunistic relaying strategy for decoding-and-forwarding wireless cooperative relay networks based on power weighting. In this strategy,the power weight is determined according to the residual energy of each node in the network,and the optimal cooperative relay of each source node is selected according to the minimum weighted-energy criterion. Moreover,the optimal power allocation between the source node and the relay node is obtained via the simplex method. Thus,the energy utilization is improved and the energy consumption of each node in the network is balanced. Simulated results show that the proposed strategy is superior to other strategies in terms of prolonging the lifetime of cooperative relay networks.

Key words: opportunistic relaying, decoding-and-forwarding, relay selection, power control

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