基于联合调度和DHT补偿的P2P直播系统播放质量改善策略(英文)

基于联合调度和DHT补偿的P2P直播系统播放质量改善策
略(英文)
陈卓;冯钢;陆毅;周杨
【期刊名称】《中国通信：英文版》
【年(卷),期】2013()6
【摘要】In Peer-to-Peer(P2P) streaming systems,video data may be lost since peers can join and leave the overlay network randomly,thereby deteriorating the video playback quality.In this paper we propose a new hybrid mesh and Distributed Hash Table(DHT) based P2P streaming system,called HQMedia,to provide high playback quality to users by maintaining high data dissemination resilience with a low overhead.In HQMedia,peers are classified into Super Peers(SP) and Common Peers(CP) according to their online time.SPs and CPs form a mesh structure,while SPs alone form a new Streaming DHT(SDHT) structure.In this hybrid architecture,we propose a joint scheduling and compensation mechanism.If any frames cannot be obtained during the scheduling phase,an SDHT-based compensation mechanism is invoked for retrieving the missing frames near the playback point.We evaluate the performance of HQMedia by both theoretical analysis and intensive simulation experiments on large-scale networks to demonstrate the effectiveness and scalability of the proposed system.Numerical results show that HQMedia significantly outperforms existing mesh-based and treebased P2P live
streaming systems by improving playback quality with only less than 1% extra maintenance overhead.
【总页数】19页(P127-145)
【关键词】分布式哈希表;流媒体系统;播放质量;联合调度;补偿机制;直播系统;点对点;基础
【作者】陈卓;冯钢;陆毅;周杨
【作者单位】National Key Laboratory of Science and Technology on Communications,University of Electronic Science and Technology of China;College of Computer Science and Engineering,Chongqing University of Technology;College of Computing,Georgia Institute of Technology,Atlanta 30332,USA
【正文语种】中文
【中图分类】TP393.01;TP393.09
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