一种P2P和ISPs协作的P2P节点选择机制  

Peer Selection Mechanism Based on the Collaboration of ISPs and P2P

作　　者：庄宏[1] 许胤龙[2] 胡燏翀[1] 林晓斌[1] 

机构地区：[1]中国科学技术大学计算机学院,合肥230027 [2]安徽省高性能计算重点实验室,合肥230027

出　　处：《小型微型计算机系统》2011年第7期1260-1266,共7页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(60773036)资助;"多媒体计算与通信教育部-微软重点实验室"科学研究基金项目(06120802)资助

摘　　要：引入ISP跳数(IH)来衡量在自治系统(AS:Autonom ous System)拓扑中位于不同位置的AS跳数的开销,并引入了骨干链接开销(CBC)来衡量P2P应用通过的骨干网络数量.借助于IH和CBC两个参数分析了P2P应用对ISPs流量的影响.并且在此基础上设计一个新的机制,命名为ISP-DDHA.在ISP-DDHA中,针对主要参数设计了相应的路由选择算法,用来改进ISPs和P2P系统性能.实验结果表明:在某些P2P流量负载较大的网络场景中,相比[7],ISP-DDHA可以减少约7.4%的DAH开销、12.1%的IH开销和10.4%的CBC开销.This paper introduced the ISP hop （IH） to measure the cost of AS （Autonomous System ） hops placed in different positions in AS topology, and introduce the Cost of Backbone connectivity （CBC） to weigh how many backbone networks which a transmission of P2P application has passed through. Then we use the two metrics for further studies of the impacts to the traffic of ISPs caused by the P2P applications. Based on the analysis, we also design a new mechanism which is named ISP-aided with Dynamic and Diverse Hop Aid （ ISP-DDHA ）. In ISP-DDHA, we design algorithms targeting the main metrics for the purpose of improving the performance of ISPs the P2P systems. The experimental results show that in the environment with heavy P2P traffic, ISP-DDHA can reduce about 7.4% of DAH cost, 12.1% of IH cost and 10.4% of CBC cost in some scenarios, compared with the ISP-aided method in [7].

关 键 词：P2P ISP 流量控制 节点选择 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]