Acta Metallurgica Sinica(English letters) ›› 2009, Vol. 16 ›› Issue (4): 98-103.doi: 10.1016/S1005-8885(08)60255-1

• Wireless • 上一篇    下一篇

Lifetime maximization of cooperative networks with mean channel gain information

杨常青,王文博,赵爽,彭木根   

  1. School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • 收稿日期:2008-07-01 修回日期:1900-01-01 出版日期:2009-08-31
  • 通讯作者: 杨常青

Lifetime maximization of cooperative networks with mean channel gain information

YANG Chang-qing , WANG Wen-bo, ZHAO Shuang, PENG Mu-gen   

  1. School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2008-07-01 Revised:1900-01-01 Online:2009-08-31
  • Contact: YANG Chang-qing

摘要:

A simple but effective relay-selection and power-allocation scheme is proposed to maximize the lifetime of decode-and-forward (DF) cooperative networks under the constraint that only the mean channel gain information is available at the transmitters. The new scheme takes both channel state information (CSI) and residual energy information (REI) into consideration. To evaluate the performance of the proposed scheme, three typical relay-selection and power-allocation schemes, i.e., maximum residual energy (MRE), minimum transmit power (MTP) and equal transmit power (ETP) are considered. Simulation results show that the proposed scheme outperforms the MRE and the MTP in lifetime duration and outage probability, while needing much less signal overhead compared with the ETP.

关键词:

cooperative;communication,;lifetime,;relay;selection,;power;allocation,;Rayleigh;fading

Abstract:

A simple but effective relay-selection and power-allocation scheme is proposed to maximize the lifetime of decode-and-forward (DF) cooperative networks under the constraint that only the mean channel gain information is available at the transmitters. The new scheme takes both channel state information (CSI) and residual energy information (REI) into consideration. To evaluate the performance of the proposed scheme, three typical relay-selection and power-allocation schemes, i.e., maximum residual energy (MRE), minimum transmit power (MTP) and equal transmit power (ETP) are considered. Simulation results show that the proposed scheme outperforms the MRE and the MTP in lifetime duration and outage probability, while needing much less signal overhead compared with the ETP.

Key words:

cooperative communication;lifetime;relay selection;power allocation;Rayleigh fading