蜂窝小区内分层中继组播策略的信道容量分析  

Layered Relay Multicast Scheme within Cells of Cellular System and Analysis for Channel Capacity

作　　者：王成金[1] 李屹[1] 张琳[1] 纪红[1] 

机构地区：[1]泛网无线通信教育部重点实验室(北京邮电大学),北京100876

出　　处：《北京邮电大学学报》2010年第6期54-57,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：北京市自然科学基金项目(4102044);国家自然科学基金重点项目(60832009);国家科技重大专项项目(2011ZX03001-007-03);国家青年科学基金项目(61001115)

摘　　要：蜂窝网小区内,中继终端的移动性会引起协同中继信道的不稳定,进而造成组播码流的频繁中断.为解决这一问题,提出了一种既能保持协同网络高带宽特性,又能改善组播服务连续性的分层中继组播策略.利用抽象信道模型和非衰减无线信道模型,对满足该策略的分层多节点中继信道的容量进行了分析.理论分析和仿真结果表明,同普通非分层中继网络相比,新策略虽然在信道容量上略有降低,但保证了组播服务的连续性.Within cells of cellular system, the mobility of relay terminals causes the cooperative relay channels instability, brings frequent interruptions to multicast stream. To solve this problem, a layered relay muhieast scheme with high-capacity and continuity of multicast service is proposed. Based on a lay- ered abstract model and a non-fading wireless model for satisfying the scheme, the capacity of layered multiple relay channel is studied. Analysis and simulation show that the scheme guarantees the continuity of multicast service when compared with general non-layered relay networks, though it causes a slight loss on capacity.

关 键 词：协同中继 分层技术 信道容量 分层组播 

分 类 号：TN929.53[电子电信—通信与信息系统]