P2P流量优化  

P2P traffc optimization

作　　者：张国强[1,2] 唐明董[2,3] 程苏琦[2,4] 张国清[2] 宋海滨[5] 曹蓟光[6] 杨景 ZHANG GuoQiang;TANG MingDong;CHENG SuQi;ZHANG GuoQing;SONG HaiBin;CAO JiGuang;YANG Jing(School of Computer Science and Technology,Nanjing Normal University,Nanjing 210024,China;Institute of Computing Technology,Chinese Academy of Sciences,Beijing 100190,China;Hunan University of Science and Technology,Key Lab of Knowledge Processing and Networked Manufacturing Xiangtan 411201,China;Graduate University of Chinese Academy of Sciences,Beijing 100190,China;Nanjing R&D Center,Huawei Technologies,Nanjing 210012,China;China Academy of Telecommunication Research of MIIT,Beijing 100191,China;China Mobile Research Institute,Beijing 100053,China)

机构地区：[1]南京师范大学计算机科学与技术学院,南京210024 [2]中国科学院计算技术研究所,北京100190 [3]湖南科技大学知识处理与网络化制造湖南,肯普通高校重点实验室,湘潭411201 [4]国科学院研究生院,北京100190 [5]华为技术有限公司南京研究所,南京210012 [6]工业和信息化部电信研究院,北京100191 [7]中国移动通信有限公司研究院,北京100053

出　　处：《中国科学：信息科学》2012年第1期1-19,共19页Scientia Sinica(Informationis)

基　　金：国家自然科学基金(批准号:61100178,61100054);南京师范大学科研启动基金(批准号:2011119XGQ0248);北京市自然科学基金(批准号:4112057);国家科技重大专项(批准号:2011ZX03002-002-03)资助项目

摘　　要：基于peer-to-peer(P2P)技术的内容分发系统已成为互联网内容分发的重要形式,它能大幅减轻P2P内容提供商的分发代价,提高系统的可扩展性.但是,覆盖网络和底层网络的失配导致了网络资源的浪费,产生了大量的冗余流量,激化了P2P内容提供商和网络运营商(ISP)之间的矛盾.因此,如何有效利用底层网络的带宽资源,降低P2P内容分发系统对ISP网络的流量压力,是P2P系统得以良性和可持续发展的关键.本文综述了P2P内容分发系统流量优化的相关技术研究现状.从P2Pcache、位置感知技术和数据调度算法3个维度出发详细阐述了不同的技术在P2P流量优化中的作用,对各种技术进行了详细的综述和对比分析,探讨了各种技术的适用环境,指出了存在的问题和未来内容分发的发展方向.Peer-to-peer （P2P） based content distribution systems have emerged as the main form for content distribution on the Internet, which can greatly reduce the distribution cost of content providers and improve the overall system scalability. However, the mismatch between the overlay and underlay networks causes large volume of redundant traffic, which intensifies the tension between P2P content providers and ISPs. Therefore, how to efficiently use network resources to reduce the traffic burden on the ISPs is crucial for the sustainable development of P2P systems. This paper surveys the state-of-art P2P traffic optimization technologies from three perspectives： P2P cache, locality-awareness and data scheduling. Technological details, comparison between these technologies and their applicabilities are presented, followed by a discussion of the issues that remain to be addressed and the direction of future content distribution research.

关 键 词：P2P流量本地化 P2P流量优化 P2P缓存 位置感知 网络编码 网络拓扑 内容网络 

分 类 号：TP393.06[自动化与计算机技术—计算机应用技术]