区域间拓扑匹配的Chord6模型研究

为了解决P2P网络中存在的不同地址前缀区域拓扑不匹配,即物理网络中相邻的两个区域在覆盖网络中相距很远,反之亦然,以及由此造成的底层路由效率低下的问题.本文采用IPv6地址层次性和其泛播通信机制对节点标识符的重新设计,改进了Chord6模型.该方法不仅使得各个区域间具有拓扑一致性,而且使得路由表具有地址聚合的特性.实验表明,该方法与Chord6相比,在覆盖网络中路由跳数上减少了约10％,在物理网络中端到端的延时降低了约10％.

Research on Chord6 model with topology matching ,inter-domains

Topology mismatching between physical topology and logical topology is that two do- mains being neighbored in the physical network may be far away in overlay network, vice versa, and this problem makes a great reduce in the underlay routing. The paper presents a new commu- nication method which utilizes IPv6 address hierarchical feature and anycast to redesign the nodes＇ identifier so as to improve the Chord6 model. The proposal not only makes all the domains have topological consistency, but also makes the routing table have feature of address aggregation. The experimental results show that, compared to Chord6, the method improves about 10% in routing hops of the overlay network and improves about 10 % in the end-to-end delay of the physi- cal network.