基于合作分集的新型自动重传协议  

Novel ARQ protocol exploiting cooperative diversity

作　　者：余官定[1] 张朝阳[1] 仇佩亮[1] 

机构地区：[1]浙江大学信息与通信工程研究所,浙江杭州310027

出　　处：《通信学报》2006年第12期20-25,共6页Journal on Communications

基　　金：国家自然科学基金资助项目(60472079);国家教育部博士点基金资助项目(20040335099)~~

摘　　要：研究了一种基于合作分集的新型链路层自动重传协议——合作ARQ协议,传输错误的数据包将由一个中继节点进行重传。根据接收端处理重传数据包的不同方式,探讨了2种协议:1)合作简单ARQ协议,目的节点在收到重传的数据包之后丢弃原始的数据包;2)合作混合ARQ协议,目的节点将重传的数据包和原始数据包进行分集合并。分析了独立慢衰落信道下合作ARQ协议性能,仿真成果证明,合作ARQ协议相比传统ARQ协议能够降低链路层的丢包率,提高了系统的传输性能。A novel automatic repeat request protocol called cooperative ARQ protocol was studied, which exploited cooperative diversity. A relay terminal was requested to retransmit an erroneously received packet in the proposed protocol. Two kinds of cooperative ARQ protocols were considered： cooperative simple ARQ and cooperative hybrid ARQ. In the cooperative simple ARQ protocol, the receiver discarded the initial packet transmitted by the source terminal when receiving the retransmitted packet from the relay terminal. While in the cooperative hybrid ARQ protocol, the receiver combined the packets from both the source terminal and the relay terminal. The performances of the two kinds of cooperative ARQ protocols were analyzed in slow fading wireless channel. The results show that the data linker layer packet loss rate is decreased and the system performance is improved in the cooperative ARQ protocols, compared with the traditional ARQ protocols.

关 键 词：信息论 合作分集 中继传输 自动重传 误包率 

分 类 号：TN915[电子电信—通信与信息系统]