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	基于多发送结点的对等网络流媒体组播结构
	汤筠 ; 张萌 ; 孙立峰 ; 杨士强 ; 钟玉琢 ; TANG Yun ; ZHANG Meng ; SUN Li-Feng ; YANG Shi-Qiang ; ZHONG Yu-Zhuo
	2010-07-15 ; 2010-07-15
会议名称	第一届建立和谐人机环境联合学术会议（HHME2005）论文集 ; 第一届建立和谐人机环境联合学术会议（HHME2005） ; 中国昆明 ; CNKI ; 中国计算机学会、中国图象图形学学会、ACM SIGCHI中国分会、清华大学计算机科学与技术系
关键词	多发送结点 对等网络 流媒体 multi-sender, peer-to-peer, video streaming TP393
其他题名	A Multi-Sender based Peer-to-Peer Multicast Architecture
中文摘要	基于对等网络的流媒体应用系统的设计和实现正成为人们研究的热点。本文针对对等网络流媒体传输系统中的带宽需求、延迟和丢包等问题,提出了一种新的基于多发送结点的对等网络流媒体组播系统结构,关键组件包括(1)基于多发送结点的覆盖网络组播协议(MSOMP)和(2)基于多发送结点的冗余重传算法(MSRRA)。MSOMP采用基于网的两层结构,将所有结点聚集成不同的集合,并确保从源结点到每个结点具有多条独立的传输路径。为了解决传输网络中突发的丢包问题,MSRRA根据接收结点预测的丢包情况在多个发送结点之间采取补偿机制。分析结果证明,由此引入的重传冗余不超过链路丢包率,但是可以有效地保证视频播放的质量。从而该系统具有较强的扩展性和可靠性,保证了应用于大范围终端用户的视频流媒体服务质量。基于该结构的实验系统已经在教育科研网络上直播了多次重要活动。在2004年8月的雅典奥运会期间,共有超过14万的终端用户和最高600的同时在线人数使用了本系统。; In recent years, there have been tremendous interests in peer to peer streaming multicast networks. And two characteristic challenges distinguish this arena, that is, a scalable and reliable multicast overlay structure, as well as an efficient content delivery mechanism. In particular, for a peer-to-peer based live video streaming application, the comfortable visual quality of service in terms of stringent playback continuity, demanding bandwidth over fluctuant and heterogeneous networks should be taken into account. To this end, we propose a novel single source peer-to-peer multicast architecture in this paper which mainly consists of 1) multi-sender based overlay multicast protocol (MSOMP) and 2) multi-sender based redundancy retransmitting algorithm (MSRRA). The MSOMP deploys mesh-based two-layer structure and groups all the peers into clusters with multiple distinct paths from the source root to each peer. Thus the aggregated bandwidth of those paths could overcome the deficient capacity of single link, while the system stability to high churn rate is improved by alternative links existing in multiple paths. To address the problem of long burst packet loss, the MSRRA is proposed at the sender peers to patch the lost packets by using receiver peer loss pattern prediction. The numerical analysis demonstrates the retransmitting redundancy introduced by patching sessions is upper-bounded by link loss ratio and it could effectively eliminate the impact of packet loss during media content playback at the end user. A practical experimental live video streaming system based on this architecture has been constructed over CERNET and broadcasted TV programs for many events. More than 140,000 end users have been attracted with almost 600 simultaneously being online at Aug, 2004 during Athens Olympic Games. Consequently, this architecture provides a scalable and reliable peer-to-peer based live video streaming multicast system for a large and highly dynamic population of end hosts, and ensures the quality of service in terms of continuous playback, bandwidth demanding and low latency.; 自然科学基金项目60273008和60432030支持
语种	中文 ; 中文
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/70027]
专题	清华大学
推荐引用方式 GB/T 7714	汤筠,张萌,孙立峰,等. 基于多发送结点的对等网络流媒体组播结构[C]. 见:第一届建立和谐人机环境联合学术会议（HHME2005）论文集, 第一届建立和谐人机环境联合学术会议（HHME2005）, 中国昆明, CNKI, 中国计算机学会、中国图象图形学学会、ACM SIGCHI中国分会、清华大学计算机科学与技术系.

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