面向跳播优化的P2P视频点播系统  

Skipping optimization for P2P video on demand system

作　　者：杜磊[1] 金志刚[1] 王晓海[2] 

机构地区：[1]天津大学电子信息工程学院 [2]中国人民解放军61660部队

出　　处：《计算机工程与应用》2013年第24期65-69,共5页Computer Engineering and Applications

基　　金：国家高技术研究发展计划(863)(No.2009AA01A336);中兴通讯产学研合作项目资助

摘　　要：基于P2VoD算法,针对其不足之处进行改变和优化,设计了新的系统。新的系统以树网结合的拓扑结构,实现对等体的加入、跳播、离开等行为的处理,尤其是对点播用户跳播行为的支持进行了特别的优化,减小了系统的延迟抖动。经过仿真,结果表明在相同的网络负载下,对等体初始加入网络时的延迟比P2VoD要小20%,同时系统比P2VoD更加稳定,并且实现了对跳播功能的支持,平均跳播时延约为初始时延的50%。A new video on demand system is designed. It is based on P2VoD algorithm, and it makes changes ana optlmlzauon for the inadequacies of P2VoD. New system combines tree topology and mesh topology, realizes actions of peers such as joining, skipping, and leaving, especially makes a special optimization for skipping behavior of users and reduces the delay jitter of the system. After the simulation, results show that with the same network load, the initial delay of peers is 20% smaller than P2VoD, while the system is more stable than P2VoD and realizes the skipping function, and the average skipping delay is about 50% of the initial delay.

关 键 词：视频点播系统 网络 对等连接(P2P) 跳播 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]