一种P2P网络拓扑构造方法DPT  

DPT: A Topology Construction Method for P2P Networks

作　　者：于真[1] 姚宣霞[1] 王颖[1] 王少杰[2] 

机构地区：[1]北京科技大学信息工程学院,北京100083 [2]国家信息技术安全研究中心,北京100094

出　　处：《四川大学学报（工程科学版）》2010年第4期103-110,共8页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家高科技研究发展计划(863计划)资助项目(2007AA012474)

摘　　要：为了改善Peer-to-Peer(P2P)网络中资源定位的效率,并隔离恶意节点,提出了一种动态的拓扑构造方法DPT,适用于非结构化P2P网络。为邻居节点设置了可变的TTL(time-to-live)值,并在交互后根据各邻居节点的转发情况对其TTL值进行调整;记录了查询路径上的直接转发节点的连接情况;给出了转发信息的放置方法及拓扑调整算法。仿真实验和分析表明,DPT拓扑构造方法可以将恶意节点隔离至网络边缘,改善了资源定位的效率,有效提高P2P网络的服务质量。To improve the efficiency of resource locating in Peer-to-Peer （ P2P） networks,and isolate malicious peers,a topology construction method for unstructured P2P networks called DPT was proposed. In DPT,each neighbor of a peer had a changeable TTL （ time-to-live） ,the reliable TTL of each neighbor was changed by its transmitting condition after each interaction,and the transmitting condition of direct forwarding peers of query paths was also recorded. The method designed some structures to store peers’transmitting information,and proposed algorithms to adjust the topology of P2P networks. Simulations demonstrated that the topology construction method of DPT can isolate malicious peers to the fringe of the network,and improve the efficiency of resource locating,enhancing the quality of service in P2P networks effectively.

关 键 词：PEER-TO-PEER 非结构化 拓扑 资源定位 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]