DR-Chord: An Efficient Double-Ring Chord Protocol

The application on P2P has been spread wildly as the researches depth in. The sharing on Internet has risen up to a new level with the using of the P2P network which include many outstanding characters comparing with the C/S (client/server) structure network, such as it's scalability, loading balance etc. It was one of the most important problem for the P2P system that how to lookup a resource reliably and effectively without any central server. Luckily the DHT based structure Chord has solved this problem preferably, but there still are some disadvantages left.The DHT-based Chord protocol for P2P networks is one of the research hotspot recently. Considering of the low efficiency problem on the resource lookup, we have developed a more efficient double-ring Chord protocol for P2P networks. We analyze theoretically the expectation of hops and present the simulation results. Finally it is proved that the efficiency of new protocol has been improved evidently.