基于P2P的可靠全序组通信系统  

P2P-based reliable group communication system for total ordering

作　　者：吴俊敏[1,2] 王文韬[1] 隋秀峰[1,2] 

机构地区：[1]中国科学技术大学计算机科学技术系,安徽合肥230027 [2]中国科学技术大学苏州研究院,江苏苏州215123

出　　处：《华中科技大学学报（自然科学版）》2009年第2期45-48,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家高技术研究发展计划资助项目(2008AA10Z111);安徽省计算机与通信软件重点实验室开放课题基金资助项目

摘　　要：提出了一种适用于Internet环境下的大规模组通信系统,包含扩展Pastry协议(EPP)和基于环的可靠组通信协议(RRGP).EPP通过已知的节点最优路径情况动态地预测网络真实路径的长度,建立一个接近实际网络节点分布的计算模型,并利用聚类预测算法划分网络节点,使同一分组的节点之间的距离最小化,提供更加合理的路由选择.RRGP在EPP的基础上实现了核心多播环模型,从而确定了多播消息序,实现了消息的全序传递,并采用缓存/重发机制,保证了消息传递的可靠性.A P2P（peer-to-peer）-based group communication system for large scale group communication on Internet was proposed, which is composed of two protocols. One is extensive pastry protocol （EPP）, and the other is ring-based reliable group protocol （RRGP）. In EPP, a mathematic modal more approximate to real network is constructed. A shortest path of nodes was used to dynamically estimate the actual latency of network. Information of adjacent nodes was gathered under a clustering algorithm to make node latency in the same cluster minimal. Thus messages can be forwarded in an efficient routing way. On the basis of EPP protocol, RRGP protocol implements a core multicasting ring. It supports total order message delivery by token passing and dynamical group management. In order to improve reliability of message delivery, buffering and retransmitting mechanism is adopted in the process of message forwarding.

关 键 词：通信系统 多播协议 可靠 全序 路由 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]