基于机会式网络编码的多阶段重传机制

发布时间：2018-07-03 09:55

本文选题：无线网络 + 重传　；参考：《系统工程与电子技术》2017年06期

【摘要】：为进一步提高无线单跳网络中基于网络编码的重传机制的效率,提出了基于机会式网络编码的多阶段重传机制(multi-stage retransmission scheme,MSRS)。根据丢包分布的不同特性,MSRS将丢包恢复分为两个阶段。第一阶段对全译码特性丢包利用严格即时可解网络编码思想进行恢复,第二阶段对非全译码特性丢包利用基于缓存的网络编码进行协助恢复。MSRS分阶段恢复丢包的思想充分利用了全译码特性包的编码机会,同时也挖掘了非全译码特性包潜在的编码机会,解决了非全译码特性包编码机会利用率低的问题。仿真实验表明,MSRS相比现有基于网络编码的重传方法能有效降低重传次数,且具有更好的稳定性。
[Abstract]:In order to improve the efficiency of retransmission mechanism based on network coding in wireless single-hop networks, a multi-stage retransmission mechanism based on opportunistic network coding (multi-stage retransmission schemeMSRS) is proposed. According to the different characteristics of packet loss distribution, MSRS divides packet loss recovery into two stages. In the first stage, the packet loss with full decoding characteristics is restored by using the idea of strict instant solvable network coding. In the second stage, the idea of partial decoding feature packet loss using cache based network coding is used to help recover .MSRS packet loss in stages, which makes full use of the coding opportunity of full decoding feature packet. At the same time, the potential coding opportunities of incomplete decoding feature packets are also explored, which solves the problem of low utilization of incomplete decoding feature packets. Simulation results show that MSRS can reduce the number of retransmissions effectively and has better stability than the existing retransmission methods based on network coding.
【作者单位】：重庆邮电大学计算机科学与技术学院;西南交通大学信息科学与技术学院;
【基金】：国家高技术研究发展计划(863计划)(2015AA01A705) 国家自然科学基金(61571375) 重庆市教委科学技术研究(KJ1704103)资助课题
【分类号】：TN92

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