Lifetime maximization for amplify-and-forward cooperative networks

被引:0
|
作者
Huang, Wan-Jen [1 ]
Hong, Yao-Win [1 ]
Kuot, C. -C. Jay [1 ]
机构
[1] Univ So Calif, Los Angeles, CA 90089 USA
来源
2007 IEEE WIRELESS COMMUNICATIONS & NETWORKING CONFERENCE, VOLS 1-9 | 2007年
关键词
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Power allocation strategies are devised to maximize the network lifetime of amplify-and-forward (AF) cooperative networks. We consider the scenario where one source and multiple partners cooperate to transmit messages to the destination. The powers emitted by the users are subject to the SNR requirement at the destination. First, the power allocation strategy that demands the minimum instantaneous aggregate transmit power of all cooperating partners is described and analyzed. The optimal solution results in a form of selective relaying; namely the user with the best channel condition is selected to help in relaying the message. However, this instantaneous power minimization strategy does not necessarily maximize the lifetime of battery-limited systems. Then, we propose three AF cooperative schemes to exploit the channel state information (CSI), the residual batter), energy and the QoS requirement. It is shown that the network lifetime can be extended considerably by taking all these three factors into account.
引用
收藏
页码:815 / +
页数:2
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