网络编码用于无线网络流媒体多播的优势分析

计算机科学 ›› 2011, Vol. 38 ›› Issue (Z10): 257-259.

网络编码用于无线网络流媒体多播的优势分析

韩莉,钱焕延

(南京理工大学计算机科学与技术学院南京 210094）； (安徽大学计算机科学与技术学院合肥 230039)

出版日期:2018-11-16 发布日期:2018-11-16
基金资助:
本文受安徽省自然科学基金项目(11040606Q07)资助

Benefits of Network Coding for Live Streaming Multicast over Wireless Channel

HAN Li， QIAN Huan-yang

Online:2018-11-16 Published:2018-11-16

摘要/Abstract

摘要： 将网络编码与基于NACK的反馈机制相结合，提出了一种以端到端方式运作的轻量级可靠传输协议。不同于NORM协议基于时间片的反馈机制，本协议应用反馈轮(feedback round)机制实现HACK抑制和HACK积累，预防NACK风暴，防止抖动。实验表明，在最大发送速率为2Mbps、组大小为128的设定下，其有效吞吐量是同类 NORM协议的1. 5倍。在此基础上，协议以网络编码代替FEC作为差错恢复机制，网络编码具有更大的编码空间，在无线网络高丢失率的情况下，具有更好的补偿特性，更适应流媒体传输时延敏感的特点。

关键词: 网络编码，无线网络，流媒体，反馈轮，多播

Abstract: For wireless channel is inherently lossy, it is challengeable to maintain the quality of service(QOS) for live streaming. We proposed a well-designed light weighted negative-ACKnowledgment(NACK) oriented reliable multicast protocol, which combines the NGbased repair in its design. NORM repair process uses time slot as the base mechanism,which results in long repair cycle. In our protocol,fecdback round algorithm is applied to optimize the repair processing.Benefits of network coding for live streaming multicast over wireless channel was also analyzed in this paper. Experiment results show that the payload throughput of our protocol is about 0. 5 times greater than that of NORM.

Key words: Network coding,Wircless channcl,Livc strcaming,Fecdback round,Multicast

韩莉,钱焕延. 网络编码用于无线网络流媒体多播的优势分析[J]. 计算机科学, 2011, 38(Z10): 257-259. https://doi.org/

HAN Li， QIAN Huan-yang. Benefits of Network Coding for Live Streaming Multicast over Wireless Channel[J]. Computer Science, 2011, 38(Z10): 257-259. https://doi.org/

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