感知驱动的VST多源应用层多播问题研究  

Research on multi-source application level multicast for awareness driven virtual space teleconferencing

作　　者：张谞[1] 吴慧中[1] 

机构地区：[1]南京理工大学计算机科学与技术学院,江苏南京210094

出　　处：《通信学报》2007年第11期103-110,共8页Journal on Communications

基　　金：江苏省自然科学基金资助项目(BK200656)~~

摘　　要：虚拟空间会议(VST,virtual space teleconferencing)是具有广泛应用前景的一种新兴CSCW工具,在当前没有IP多播支持以及大多数端用户访问带宽有限的互联网条件下,实现互联网上的VST应用缺乏有效的通信机制。针对这一问题,提出了一种感知驱动的VST多源应用层多播方法ESMVST,该方法采用了网优先的集中式策略,重点研究了ESMVST方法中的路由模型VSTMMR,提出一种启发式路由算法MDMM。实验结果表明MDMM算法有效降低了算法的拒绝率和数据分发树的最大延迟,ESMVST方法实用可行。Virtual space teleconferencing is a novel CSCW tool that has abroad application perspective. There is no efficient communication mechanism to realize virtual space teleconferencing on Internet because most of end hosts in today＇s Internet have limited access bandwidth and the Internet does not support IP multicast. Adopting mesh-first and centralized strategies, a multi-source application level multicast method ESMVST for awareness driven virtual space teleconferencing on Internet was devised. The research focused on ESMVST method＇s application level multicast routing model VSTMMR and proposed a heuristic routing algorithm MDMM. The result of experiment shows that MDMM algorithm could reduce both algorithm＇s rejection rate and data distribution trees＇ maximal delay effectively, and ESMVST method is feasible.

关 键 词：虚拟空间会议 感知驱动 应用层多播 多源 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]