蜂窝小区内基于网络编码技术的中继协作传输机制研究  

Research of relay transmission mechanism based on network coding technology in cells

作　　者：黄琼[1] 倪铭璟[1] 唐伦[1] 陈前斌[1] 

机构地区：[1]重庆邮电大学移动通信技术重点实验室,重庆400065

出　　处：《计算机应用研究》2011年第1期275-278,共4页Application Research of Computers

基　　金：国家科技重大专项目(2008ZX03003-005);重庆市自然科学基金重点资助项目(CSTC2009BA2090);重庆市教委科学技术研究项目(KJ100514)

摘　　要：针对中继协作传输机制在蜂窝小区内应用的问题,基于物理层网络编码(physical network coding,PNC)的调制/解调方式,提出一种中继-物理层网络编码(relay-physical network coding,R-PNC)的中继协作传输机制。通过将网络编码-解码转发(networ coding-decode and forward,NC-DF)、网络编码-放大转发(network coding-am-plify and forward,NC-AF)及R-PNC协作传输机制分别应用到蜂窝小区内进行中继协作通信,改进相应的中继传输协议,并分析不同时隙下的中继状态,采用Markov链建立中继传输状态的转移模型,推导三种协作传输机制下的上行链路归一化网络吞吐量公式。仿真结果表明,三种协作传输机制与传统中继转发机制相比,都能够提高小区内的吞吐量。其中基于物理层网络编码的中继协作(R-PNC)传输机制性能最优。In order to solve the problem of relay cooperation transmission mechanism which applied in cells , this paper improved a R-PNC cooperation transmission mechanism. By taking NC-DF, NC-AF and R-PNC into relay cooperation communication of cells, improving above three kinds of relay transmission protocols and analyzing different relay states of different slots, adopted Markov to establish transfer model of relay transmission state and derived up-link normalized network throughput for- mula of three kinds of cooperation transmission mechanisms： The simulation results show, comparing with traditional relay for- ward mechanism, all above cooperation transmission mechanism can enhance the throughput in cells, and R-PNC transmission mechanism is the best of all.

关 键 词：中继协作 传输协议 网络编码-解码转发 网络编码-放大转发 物理层网络编码 归一化吞吐量 

分 类 号：TP393.03[自动化与计算机技术—计算机应用技术]