分域分层的应用层组播拓扑构建方法  

Hierarchical domain based application layer multicast topology construction method

作　　者：杨贯中[1] 郭超[2] 陆绍飞[1] 钱佳[2] 林正海[2] 

机构地区：[1]湖南大学软件学院,湖南长沙410082 [2]湖南大学计算机与通信学院,湖南长沙410082

出　　处：《计算机工程与设计》2008年第2期350-353,356,共5页Computer Engineering and Design

摘　　要：简述了已有的应用层组通信技术,分析了在应用层进行组播拓扑构建时的受限情况,基于分域分层思想,提出一种适用于大规模实时组通信应用的应用层组播拓扑构建方法——HD-ALMT。依据IP地址分配与路由的聚类特性,把邻近的节点划分到同一个域中,域内选择中心节点作为域代理,域内节点和域代理节点间再动态分层构建组播拓扑。实验仿真表明,HD-ALMT构建的组播拓扑具有良好的效率和扩展性。After describing the current application layer group communication technology and analyzing the limitation in application layer topology construction, HD-ALMT （hierarchical domain based application layer multicast topology） is presented based on hierarchical domain argument, aimed at large scale real-time group communication requirement. Depending on the aggregated properties in lP address allocation and routing, HD-ALMT arranged neighboring hosts to different multicast sub-domains, and selected the center host of subdomain as the domain agent, then constructed hierarchical multicast topology structure dynamically in inner-domain nodes and domain agents. Simulation results indicate this method has a good data forward path quality and flexibility.

关 键 词：叠加网 应用层组播 分域分层 拓扑构建 链路强度 路径伸展度 

分 类 号：TP393.02[自动化与计算机技术—计算机应用技术]