异构无线通信系统的协同中继选择-北京邮电大学学报.PDFVIP

2008 年 10 月 北 京 邮 电 大 学 学 报 Oct .2008 第 31 卷 第 5期 Journal of Beijing University of Posts and Telecommunications Vol .31 No .5 文章编号 :1007-5321(2008)05-0082-06 异构无线通信系统的协同中继选择 彭木根 , 王文博 (北京邮电大学 泛网无线通信教育部重点实验室 , 北京 100876) 摘要 :提出了一种基于协同机理的异构无线网络融合机制 ,并就协同中继选择给出了基于效用函数的理论优化模 型 .该模型在保证第 1 跳和第 2 跳链路传输速率匹配的前提下 ,从全局优化的角度选择最佳的中继节点 .为了降 低计算复杂度 ,给出了次优的异构协同中继节点选择算法 .仿真结果表明 ,该协同中继节点选择算法能显著提高异 构网络的性能 . 关 键 词 :异构无线网络融合 ;协同通信 ;中继选择 中图分类号 :TN929.53 文献标识码 :A Cooperative Relay Selection in Heterogeneous Wireless Communication Systems PENG Mu-gen , WANG Wen-bo (Key Laboratory of Universal Wireless Communications ,Ministry of Education ,Beijing University of Posts and Telecommunications ,Beijing 100876 ,China) Abstract :A cooperative theory based convergence mechanism for heterogeneous wireless networks is presented , and a theoretical optimization model for the cooperative relay selection is proposed , in which the utility function is involved .The proposed model can determine the optimal relay nodes from the global viewpoint under the conditions of equivalent transmission rates between the first and second hops .In order to decrease the computation complexity ,a sub-optimal relay selection algorithm is pre- sented .Simulation shows that the proposed cooperative relay selection algorithm can improve the over- all performances dramatically . Key words :heterogeneous wireless communication system ;cooperative communication ;relay selection 异构无线通信网络的互联互通成为目前业界研 充 ,通过对蜂窝移动网络的集中控制和管理 ,实现异 究的焦点 ,目的在于充分利用已经存在的各种无线 构无线网络的互联互通 ,提高网络的整体性能 ,简化 网络 ,在终端只配置一种模式的前提下能够