覆盖多播路由的算法及协议研究综述

虽然IP多播的性能优势无可否认,但是它却面临着部署上的困难。近年来,覆盖多播作为提供多播服务的另一可行途径正不断为人们所认可。本文对覆盖多播路由的算法和协议进行了综述研究,提出了通用的覆盖多播网络模型,对覆盖多播中的路由优化问题进行了分类。在此基础上,介绍了当前重要的覆盖多播路由算法和协议,并对它们的性能参数、所解决的路由问题、系统结构和控制方式等技术特点进行了全面的分析和讨论。另外,本文还指出了覆盖多播路由中一些有待进一步研究的问题。

A Survey of Routing Algorithms and Protocols in Overlay Multicast

Though the performance advantage of IP multicast is undeniable, the deployment of IP multicast has met many difficulties. In recent years, overlay multicast is being increasingly recognized as a viable alternative. In this paper, an overview of overlay multicast routing algorithms and protocols were provided. A general overlay multicast network model was proposed, and the routing optimal problems in overlay multicast were identified and classified. Based on above work, some recent important overlay multicast routing algorithms and protocols were described, and a set of properties of them, including performance metric, routing problem solved, system structure and control method etc. , were fully analyzed and discussed. In addition, some further research problems in overlay multicast routing were also pointed out.