无线网络功率最小化的分布式中继选择方法

Minimum Transmit Power Based Distributed Relay Selection in Wireless Networks

中继协作已视作提高边沿用户能量有效性和服务质量的新型技术。因此,针对存在瑞利衰落的解码转发中继网络如何选择中继节点以最小化系统总功率的问题,提出了使用分布式拍卖算法选择合适的中继节点以最小化系统总传输功率。该算法首先通过信道传输功率的闭合表达式得到用户节点和中继节点的最小传输功率,然后根据分布式拍卖算法为用户节点分配合适的中继节点。仿真结果显示用户节点仅需要通过和中继节点交换少量信息就可以选择合适的中继节点。

Relay cooperation has been proposed as a promising solution to improve the energy efficiency and servicequality of edge users. In this regard,this work proposes a distributed auction-based relay selection algorithm to mini-mize the total transmit power consumption for dual-hop decode-and-forward relay networks over Rayleigh fadingchannels. In particular,we first provide the optimal power consumption of any cooperative transmission in theclosed-form expression. Then,we design a distributed relay selection algorithm that assigns every user to the appro-priate relay node based on the idea of auction. Simulation results show that every user node can find its best coopera-tive relay through limited message passing with relay nodes.