Research of Connections-Oriented Relay Policy of P2P Instant Messages

It is required that all peers may initialize communication in P2P Instant Message Systems. With the deploy- ing of network security equipment, there are two types of P2P communication domains, which are the outer network and inner network. So, the peers in outer network can not initial the inbound connection to the inner ones, and the communication between the outer and inner peers is blocked. Analyst and design a high performance communication mechanisms-Small Service Peer, which avoids the delay brought by relay service of the third side. Propose the relay judgment algorithm of inner network, which is used to optimize the communication between the peers in the same in- ner network. The experiments show that the Small Service Peer and the relay judgment algorithm of inner network can decrease the dependence of P2P application system to the relay server and improve the real time performance while not changing the under layer network