中文摘要：

针对无线传感器网络的传统协作伙伴选择方法不允许链路复用中继，致使产生中继节点抢占的问题，建立了允许协作链路间复用中继节点的系统模型，运用拉格朗日乘子法优化中继节点上功率分配最大化协作增益，分析复用中继能获得误码率增益和功率增益的条件和功率分配，提出一种中继复用的分布式协作伙伴选择方法。理论分析和仿真结果表明，允许中继通过功率分配进行复用的新伙伴选择方案能降低无线传感器网络的系统总功耗，并使更多链路的误码率需求得到满足。

英文摘要：

Aiming at the problem that traditional partner selection methods for cooperation wireless sensor networks bring about relay node competition, the paper constructs the system model which allows cooperative links to multiplex the relay node, obtains the maximum cooperation gain by optimizing relay node＇s power allocation with the l_agrange Method, analyzes the condition and optimum power allocation when the system can get the bite error ratio gain or power gain, and proposes a distributed relay multiplexing partner selection method. The theoretical analysis and simulation results prove that the new method can satisfy the bite error ratio requirement of more links and reduce the total power consumption of the system.