保障QoS的P2P分布式VOD系统的设计  

Design of a QoS Guaranteed Distributed P2P VOD System

作　　者：刘鹏[1] 都志辉[1] 李三立[1] 陈渝[1] 朱子玉[1] 黄震春[1] 顾雷[1] 

机构地区：[1]清华大学计算机科学与技术系,北京100084

出　　处：《计算机科学》2002年第9期86-90,共5页Computer Science

摘　　要：引言 网络对等计算模式P2P(Peer-to-Peer)[1,4,5,18]是当今的研究热点之一.与较早的C/S(Client/Server)计算模式相比,该模式没有明显的Client端与Server端的区别,可以认为它的任何一端同时具有Client和Server的功能.To decentralize the VOD services by using the booming P2P technology, of which any user acts as both the consumer and the provider, will eliminate the bottleneck of traditional VOD systems and remove the heavy task to provide film resource. The paper provides three choices to implement the system with a comparison of each other. Policies to guarantee the QoS are discussed as well, such as to dynamically select the server with the highest QoS value and replace it when its QoS drops below a threshold, etc. The paper is the first one that presents a method to describe the volume capability of a P2P video node. By using the method, it gets proving results of the feasibility of the P2P VOD system from an elaborate experiment.

关 键 词：分布式视频点播系统 QOS 服务质量 网络对等计算模式 P2P 分布式VOD系统 设计 

分 类 号：TN948.64[电子电信—信号与信息处理]