摘要
P2P即时通信模型要求所有对等节点都能进行双向通信,但网络安全技术方案的实施,使得整个P2P通信域有了内网和外网的区分,并且外网节点不能向内网主动发起连接,故P2P双向心通信受到限制。本文分析并设计了一种高效的通信机制-小服务器节点(Small Service Peer)避免由第三方的通信中继服务所导致的延时。提出了内网中继判定算法,以优化处于同一内网节点之间通信的性能。试验表明,采用本文提出小服务器对等节点的通信机制和内网中继判定算法,在不改变下层网络结构和配置的条件下,可以显著降低P2P应用系统对中继服务器的依赖,并提高即时通信系统实时性。
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
出处
《计算机科学》
CSCD
北大核心
2005年第6期25-29,共5页
Computer Science
基金
国家信息产业部电子发展基金(编号:信部运[2004])
