应用层组播转发树构造技术研究

Research on the Construction of ALM Forwarding Trees

应用层组播解决了网络层组播难于部署的问题,但是效率不及网络层组播。本文针对如何构建一棵高效的应用层组播转发树的问题,基于MixCast通信模型,提出并实现了一种分布式的,采用基于最近网络拓扑节点选择策略的转发树生成算法。通过仿真实验,分析了采用这种策略构造的转发树的平均延迟、平均加入时间等主要指标,实验结果表明此种方法能更多的考虑实际网络状况,提高数据转发效率。

Application Layer Multicast(ALM)has resolved the issue of deployment,but effectiveness inferiors to IP multicast.To build a high efficient multicast tree,the research is focused upon the distributed spanning tree algorithm using Nearest physical topology node selection strategy,which are based on a new group communication model named MixCast.The average delay and average join time of the tree are analysed.Simulation experiments prove that real physical network are considered in this strategy,so it has high ...