结构化P2P路由协议Chord的研究与改进

Research and Improvement on the Structured P2P Routing Protocol of Chord

为了解决P2P系统中高效地定位资源节点、提高系统性能的问题,讨论了两种基于Chord协议的更为优化的资源查找策略:第一,提高阶数,扩大路由表覆盖率,使指针的分布更加细密,以此扩大查询范围;第二,在提高阶数的基础上更改查询方法,减小发起点查找资源时的延时。模拟实验结果表明,两种修改方法各有侧重点,相辅相成,能够在一定程度上提高查找资源的效率。

In order to locate the resource key with high efficiency and improve the system＇s capability in P2P system, two better strategies of resource searching based on the Chord protocol are discussed： first, increasing the routing base number, and extending the bestrow rate of routing table, which will make the finger table denser so as to enlarge the query bound; second, improving the query method based on the increased base number, which can shorten the latency when the original sender searches in the resource. Simulation experiments show that the two improvements emphasize particularly on their specific points, and meanwhile supplement each other. In one word, these methods can promote the efficiency of researching resources to certain extent.