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基于联合调度和DHT补偿的P2P直播系统播放质量改善策略
引用本文:陈卓,冯钢,陆毅,周杨. 基于联合调度和DHT补偿的P2P直播系统播放质量改善策略[J]. 中国通信, 2013, 10(6): 127-145. DOI: 10.1109/CC.2013.6549265
作者姓名:陈卓  冯钢  陆毅  周杨
摘    要:

收稿时间:2012-10-31;

Improving Playback Quality of Peer-to-Peer Live Streaming Systems by Joint Scheduling and Distributed Hash Table Based Compensation
CHEN Zhuo,,FENG Gang,LU Yi,ZHOU Yang. Improving Playback Quality of Peer-to-Peer Live Streaming Systems by Joint Scheduling and Distributed Hash Table Based Compensation[J]. China Communications, 2013, 10(6): 127-145. DOI: 10.1109/CC.2013.6549265
Authors:CHEN Zhuo    FENG Gang  LU Yi  ZHOU Yang
Affiliation:National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China
College of Computer Science and Engineering, Chongqing University of Technology, Chongqing 400054, China
College of Computing, Georgia Institute of Technology, Atlanta 30332, USA
Abstract: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 sched-uling 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 ef-fectiveness 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.
Keywords:P2P  live streaming  playback quality  hybrid architecture
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