多用户协同无线网络中的中继选择的研究  

Research on relay selection in multi-user cooperative wireless networks

作　　者：梁慜[1] 王亚峰[1] 杨大成[1] 

机构地区：[1]北京邮电大学无线理论与技术实验室北京100876

出　　处：《高技术通讯》2010年第11期1129-1133,共5页Chinese High Technology Letters

基　　金：863计划(2007AA01Z211);国家自然科学基金(60602060)资助项目

摘　　要：针对多用户协同无线网络中的中继选择问题,提出了两种基于不同系统开销的半分布式中继选择算法。这两种算法以中断概率为优化目标,充分利用多用户协同无线网络的特点,以较低的系统开销和计算复杂度获取使系统中断概率达到最小的中继选择问题(指派问题)的次优解。仿真结果表明,两种算法均可以较好地逼近中断概率性能的下界,并保证用户公平性,而算法2以较大的系统开销换取优于算法1的容量性能。提出的两种半分布式算法在性能和系统开销之间获得了较好的折衷,可以大幅简化中继选择在实际无线通信系统中的应用,尤其适用于稠密人口地区的应用。The paper proposes two novel semi-distributed relay selection algorithms based on different system overheads in multi-user cooperative wireless networks. The algorithms formulate the relay selection problem as an assignment problem of making the outage probability of the system minimal, and obtains the sub-optimal matching with the low system overhead and computational complexity by utilizing the characteristics of the multi-user cooperative networks. The simulations show that the proposed algorithms can press the outage probability close to the lower bound and ensure the faimess for users. Moreover, the algorithm 2 gets the better capacity performance than the algorithm 1 with the more system overhead. The proposed algorithms achieve good tradeoff between the performance and the system overhead, which can simplify the application of relay selection in practical wireless communication networks, especially in the densely populated areas.

关 键 词：中继选择 调度 用户协作 机会中继 协同网络 

分 类 号：TN929.5[电子电信—通信与信息系统]