摘要： 为提高多播协议的可扩展性，提出一个基于分群的高效多播路由协议(ECMRP)。采用改进的基于权重的分群算法对移动自组网中的移动节点进行分层管理，并应用软状态方法在群首间建立多播树，减小当网络拓扑结构动态变化时重构、维护多播树结构的控制开销。仿真实验结果表明，该算法在路由开销和分组投递率上均优于多播按需距离矢量和按需多播路由协议，更适合于高动态、大规模的自组网。

关键词: 分群, 权重, 多播路由, 树结构

Abstract: To improve the scalability of multicast protocol, this paper proposes an Efficient Clustering-based Multicast Routing Protocol (ECMRP), which is extension of flat multicast routing protocols in Mobile Ad hoc NETworks(MANET) of large scale. The proposed protocol adopts an Improved Weighted Clustering Algorithm(IWCA) to manage hierarchically mobile nodes, and uses a soft state approach to form multicast tree within cluster heads. The simulation experiment shows the protocol has the advantages of low control overhead, high delivery ratio with Multicast Ad hoc On-demand Distance Vector(MAODV) and On-Demand Multicast Routing Protocol(ODMRP), and proves ECMRP is better suitable for large-scale self-organization networks with high mobility.

Key words: clustering, weight, multicast routing, tree architecture

中图分类号: 

• TP393.04