【作者】 汪树勋；

【导师】 徐德启；

【作者基本信息】 兰州大学 ， 计算机软件与理论， 2007， 硕士

【摘要】 随着计算机技术的快速发展和宽带网络的进一步普及，P2P技术被誉为改变互联网未来的新技术之一，各种P2P类型应用层出不穷，但是当前的一些P2P典型应用给电信主管部门和运营商带来了一些麻烦。主要表现在两个方面：一是P2P类应用吞噬带宽，二是P2P类应用难以监管。Cache技术的应用在互联网中非常普遍，本文将Cache技术和P2P技术相结合，设计了一种运营商内部网络P2P流量缓存系统P2PCache，在不影响客户P2P应用体验的情况下，为运营商优化现有网络，降低出口流量，主要工作体现在以下几个方面：首先，设计了一种新型的、适用于各种网络环境的P2P流量缓存系统P2PCache，它通过将各种P2P应用请求重定向至内网Tracker服务器，由内网Tracker引导客户进行传统的P2P互联，从而达到促进内网用户互联，节省出口带宽的目的。该系统构架具备较好的可复用性，在改变重定向方式后可应用于其他P2P实例。其次，在P2PCache系统中较好地解决了系统负载问题，在对用户下载行为和内容命中率的分析的基础上，为不同的用户或者内容提供区别服务，并给出了一种部分重定向算法来实现。再次，针对传统协议分析技术无法对P2P流量进行准确的预估和判断的弊端，给出了针对应用层分析的新的协议分析手段及实现过程。最后，对文中所提出的流量缓存系统通过实际运行进行了验证。更多还原

【Abstract】 With the computer technology development and the wide band network further popularization, the P2P technology was regarded as the one of Internet future new technical. Each kind of P2P type application emerges one after another incessantly, but the current some P2P application has brought some troubles for the telecommunication department. Mainly displays in two aspects: One is a P2P kind of application swallows the band width, two is a P2P kind of application supervises and manages with difficulty.The Cache technology application is extremely common in the Internet, this thesis unifies the Cache technology and the P2P technology, has designed one kind of interior P2P capacity buffer system in telecommunication department called P2PCache, in did not affect the customer P2P application experience, optimized the existing network, reduced the rate of discharge, the main work manifested in followings:Firstly, counted a new, suitable for each kind of network environment P2P capacity buffer system P2PCache, it redirect P2P application request to innet tracker server, thus achieved the goal that the innet user interconnection, saved the exportation band width . This system has well reuse, after changing the redirect way can be possible apply to other P2P application.Secondly, in the foundation of analysis user downloading behavior, solved the system load banlance problem well in the P2PCache system, provides the difference service for the different user, and produce one kind of part redirect algorithm to realize.Thirdly, in view of the tradition protocol analysis technology is unable to the P2P current to carry on the accurate eestimate, has produced the new protocol analysis method of application level and produce the realization process.Finally, through the actual movement confirm the current buffer system which proposed in this thesis.更多还原