P2P流媒体系统中基于多点获取的快速启动机制  

Multi-peer retrieval based fast start-up scheme in P2P streaming system

作　　者：莫益军[1] 王非[1] 黄本雄[1] 涂来[1] 

机构地区：[1]华中科技大学电子与信息工程系,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2008年第6期69-72,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：湖北省科技攻关项目(2006AA102A04)

摘　　要：在对等网络(P2P)流媒体系统中,为保证媒体的平滑播放,缩短节点的启动时延,充分利用P2P网络中节点的存储资源和带宽资源,提出了一种基于多点获取的启动方法.即在提供服务的节点上缓存一部分媒体数据,以提高客户节点请求数据的命中率;同时,客户节点以自身与服务节点间的端到端时延为依据,并发地从多个服务节点获取媒体数据,以加快获取媒体数据的速度.该方法隐藏了P2P流媒体系统中的搜索时延,屏蔽了网络时延,加快了数据获取,从而将节点的启动时延缩短40%以上.For peer to peer （P2P） streaming system, a multi-peer retrieval based start-up method was proposed to ensure playback smoothly and to reduce the start-up delay, which makes full use of P2P peers＇ storage resources and bandwidth resources. In the method, server peers buffer some part of media data to increase hit rate of the request data; while the client peers retrieve the data from the servers in parallel according to end-to-end delay between themselves and the server peers. By the method, searching latency was hidden, network delay was screened, and data retrieval was speeded. As a result, the start-up delay has been decreased by above 40%.

关 键 词：对等网络 流媒体 多点获取 快速启动 时延隐藏 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]