协同通信中一种改进的中继选择方案  

Improved Relay Selection Scheme for Cooperative Communication

作　　者：陈慧林[1] 王呈贵[2] 杨文东[2] CHEN Hui-lin WANG Cheng-gui YANG Wen-dong(Postgraduate Team 3 CCE, PLAUST, Nanjing 21007, China College of Communications Engineering, PLAUST)

机构地区：[1]解放军理工大学通信工程学院研究生3队,江苏南京210007 [2]解放军理工大学通信工程学院

出　　处：《军事通信技术》2016年第3期26-30,76,共6页Journal of Military Communications Technology

摘　　要：协作中继技术不仅可以提高无线链路的传输速率和传输的可靠性,还可以增加网络的覆盖范围及减小能量消耗,受到学术界和工业界的关注。近年来,人们开始考虑在中继中引入缓存,来进一步提高系统性能。文章针对缓存辅助中继系统提出一种改进中继选择方案。在中继选择时,同时考虑了当前的信道质量与剩余缓存大小。文章采用马尔科夫链模型来分析缓存状态转移,并分析了系统的中断概率和时延。研究表明此方案能降低网络的平均时延,提升无线中继网络的工作速率。Cooperative relaying technology can not only improve the reliability of the wireless link transmission and the rate of transmission,but also increase network coverage and reduce energy consumption,which is concerned by academia and industry.In this paper,an improved relay selection scheme was proposed for buffer-aided relay system based on finite buffer relay.In the relay selection,not only the quality of the current channel was considered but also the remaining buffer size.In this scheme,Markov chain model was used to analyze the buffer state transition,the outage probability and the average delay of the system.This study shows that the proposed program can reduce the average delay of the network,and improve the transmission rate of wireless relay networks.

关 键 词：缓存辅助中继 中断概率 中继选择 平均时延 

分 类 号：TN925[电子电信—通信与信息系统]