基于模拟网络编码的多用户信息交换的中断概率  

Outage Probability of Multiuser Information Exchange Based on Analogy Network Coding

作　　者：李世唐[1,2] 郑宝玉[1] 侯晓赟[1] 崔景伍[1] 

机构地区：[1]信号处理与传输研究院南京邮电大学,南京210003 [2]数学与计算机科学学院福建师范大学,福州350007

出　　处：《信号处理》2011年第7期975-981,共7页Journal of Signal Processing

基　　金：国家自然科学基金(60972039;61072080);江苏省自然科学基金重点项目(BK2010077);东南大学移动通信国家重点实验室开放课题(2010D02);信号与信息处理重庆市市级重点实验室开放研究基金资助课题

摘　　要：与通常假定一对用户通过一个中继节点进行数据交换不同,该文考虑两对用户通过一个公共中继节点的协作进行数据交换的无线通信模型,研究了基于模拟网络编码的放大转发中继策略的中断概率。相对于传统的基于放大转发或译码转发等的、需要8个时隙实现数据交换的中继策略和传统的基于译码转发的、需要5个时隙实现数据交换的网络编码中继策略,模拟网络编码的中继策略只需要3个时隙就可以实现两对用户之间的数据交换,因而与前两种中继策略相比,基于模拟网络编码的中继策略能极大地提高系统的吞吐量(该中继策略分别提高了166%和66%的系统吞吐量)或者极大地减少中继节点的能量消耗。在所提的基于模拟网络编码中继策略下,该文进一步推导出了系统中断概率的上界和下界,数值分析结果表明该上下界比较接近,特别是当中继节点位于第一对用户节点中间时上下界非常接近。This paper investigates outage probability under the amplify-and-forward（AF）relaying scheme based on analogy network coding（ANC）over wireless communication context,where not one but two pairs of users exchange their data by virtue of an common relay.Compared with the traditional relaying schemes such as amplify-and-forward（AF）,decode-and-forward（DF）,which need 8 time slots to exchange the information,and network coding based on DF,which needs 5 time slots to exchange the information,ANC relaying protocol can accomplish the information exchange between two pairs of users using only 3 time slots,thus,it can achieve 166% improvement in physical-layer throughput over the traditional scheduling scheme based on AF or DF,and 66%over the network coding scheme based on DF,on the other words,it can dramatically increase the system capacity or decrease the total energy consumed by relay node.This paper also presents the upper bound and lower bound of system outage probability under proposed ANC relaying protocol. The results of numerical analysis show that these bounds approach comparably the exact system outage probability,especially when the relay node lies in the middle of the first pair of user nodes.

关 键 词：模拟网络编码 放大转发 中断概率 信息交换 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]