普适环境下带宽自适应的组播策略

提出一种以树状拓扑为主干,Mesh状拓扑为辅助的组播策略.首先定义严格单源树状拓扑,并根据普适环境下结点的自治性行为提出放松单源树状拓扑.其次分析树状拓扑动态性带来的带宽瓶颈问题.通过Mesh状辅助拓扑和结点带宽使用情况动态调整结点状态,实现了自适应的带宽使用策略,保证了较高的使用率和可用性.分析模拟结果表明,与现有的方法相比,该策略能够取得较好的组播性能.

An Bandwidth Adaptive Multicast in Pervasive Computing Environment

This paper presents an application-level multicast using a tree-bone overlay and an auxiliary mesh.We firstly define the strictly simple resource tree-based overlay,and then propose the relaxed simple resource tree-based overlay according to the observation of self-contained performance of peers in pervasive environment.Next we analyze the churn of tree-based overlay and the resulting issue of bandwidth bottleneck.With an auxiliary mesh and state transitions based on the dynamic size of bandwidth,we design ...