一种改进的网络编码差错控制方法  

An Improved ARQ Error Control Approach

作　　者：刘思夏[1] 杨路明[1] 谢东[1,2] 

机构地区：[1]中南大学信息科学与工程学院,长沙410083 [2]湖南人文科技学院计算机科学技术系,湖南娄底417000

出　　处：《小型微型计算机系统》2012年第2期365-369,共5页Journal of Chinese Computer Systems

基　　金：湖南省教育厅科研基金项目(08B040)资助

摘　　要：为了能更高效的接收源点的信息,针对随机线性网络编码,提出一种新型的差错控制方法.采用三维双向斜行列校验码进行检错,丢弃错误的数据包不让其参与编码.宿点通过反馈信道告知源点其解码情况,存在不能解码成功的情况,源点就根据反馈信息中各种因素构造重传的分组成分.当存在多次重传失败时,源点就稍微降低组播率.通过分析和仿真测试表明,该方法检错能力强,信息传输效率高.In order to receive the information of source more efficiently, this paper proposes a new ARQ error control method, aiming at random linear network coding. It checks the error by three dimensional double cater-comer line redundancy codes; discards the er- ror packets to prevent their participation in the coding. The sink nodes inform the source their decoding situation through their feed- back channel, if there are sink nodes who can not decode successfully, the source constructs the retransmission components according to the feedback information. When retransrnission failed repeatedly, the source reduces the multicast rate slightly. Through analysis and simulation tests, it shows that the ability of error detecting is strong; the efficiency of transmission is high.

关 键 词：随机线性网络编码 单源组播 三维双向斜行列校验码 差错控制 重传 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]