Abstract: In structured P2P systems, the topology of underlying physical network is not considered on building logical overlay, whose route mechanism is designed from nodes border upon logic, so neighboring nodes in physical network have large delay. A P-Chord system model is proposed on the basis of Chord in the paper, which uses the topology of physical network and adds neighbor route table. The experimental results show there are preferable improvements in route delay and hops of overlay network when P-Chord is compared with Chord.

Key words: P2P systems, Chord model, network topology

摘要： 在结构化P2P系统中，建立逻辑overlay时没有考虑底层物理网络拓扑结构，其路由机制主要是根据节点逻辑上的相邻性进行设计，导致物理网络邻近节点的延迟较大。该文在Chord 基础上提出一种P-Chord系统模型，利用物理网络的拓扑结构，在节点路由表中增加了邻居表，实验证明P-Chord在路由延迟和覆盖网络的跳数上相比Chord都有较好的改善。

关键词: P2P系统, Chord模型, 网络拓扑

CLC Number: 

• TP393