摘要： 提出一种基于节点剩余功率的多中继放大转发协同节点选择算法，根据节点信道状态信息(CSI)和剩余能量信息对网络生存时间进行优化，使用加权函数和信道容量增益门限进行多协同节点选择。仿真结果表明，对于动态和固定功率分配，该算法选择三四个中继可使协同通信系统性能达到最优；相对基于CSI的单中继选择算法，当中继数为4时，其在动态功率分配时的网络生存时间最高可延长82%。
关键词:
协作分集,
剩余功率,
放大转发,
多中继选择,
网络生存时间
Abstract: This paper presents a multi-relay Amplification Forwarding(AF) cooperative node selection algorithm based on Residual Power(RP), which jointly considers the Channel State Information(CSI) and the residual energy information of nodes to optimize the network lifetime, uses the weighting function and the channel capacity gain threshold to select the relay set. Simulation results show that both dynamic relay power distribution and fixed relay power distribution, performance reached the best while selecting the 3~4 relays. Relative to only considering the CSI node selection algorithm, this algorithm is able to extend network lifetime up to 82% under dynamic relay power distribution and 4 relay numbers.
Key words:
cooperative diversity,
Residual Power(RP),
Amplification Forwarding(AF),
multi-relay selection,
network lifetime
中图分类号:
覃琴, 曾志民, 张天魁, 张从青. 基于节点剩余功率的多中继选择算法[J]. 计算机工程, 2011, 37(10): 76-78.
QIN Qin, CENG Zhi-Min, ZHANG Tian-Kuai, ZHANG Cong-Jing. Multi-relay Selection Algorithm Based on Node Residual Power[J]. Computer Engineering, 2011, 37(10): 76-78.