基于延时影响因子的应用层多播ASD模型改进研究  

An improved ASD model of the ALM with delay impact factor

作　　者：崔建群[1] 王博伦[1] 熊涛[1] 吴黎兵[2] 

机构地区：[1]华中师范大学计算机学院,湖北武汉430079 [2]武汉大学计算机学院,湖北武汉430072

出　　处：《计算机工程与科学》2015年第10期1836-1842,共7页Computer Engineering & Science

基　　金：国家自然科学基金面上项目(61170017;61272112;61370108);湖北省科技支撑计划资助项目(2013BAA004)

摘　　要：为提高应用层多播的稳定性和效率,在原ASD-TS模型上加以改进,提出一种基于延时因子的ASD-DIF模型。该模型可以在新节点探测整个多播网络的基础上自主选择加入方式,使新节点给整个多播组带来的延时最小,构建高效率、高分发度的多播树。仿真实验表明ASD-DIF模型在构建多播网络的时候能够构建高效率的转发路径,有效降低多播的时延。In order to improve the stability and efficiency of Application Layer Multicast （ALM）, based on the old timestamp-based adaptive ALM overlay model with overlay structure detection, a new delay impact factor based ASD model, named ASD-DIF,is proposed. After a new node detects the whole net, this model can choose a way to add the node into the net so that the new node brings the least time cost and a high efficient and distributed multicast tree is constructed. Simulation experiments show that the ASD-DIF model can build the multicast net with high efficient transmission paths and reduce the delay of the multicast tree efficiently.

关 键 词：应用层多播 延时因子 自主选择 高分发度 

分 类 号：TP393.032[自动化与计算机技术—计算机应用技术]