组播路由协议HBH的分析与研究

Analysis and Study of Multicast Routing Protocol HBH

组播路由协议HBH具有良好的可扩展性且内存需求低,但其对路由路径变化的适应能力及本地组播效率有待改进。该文分析了HBH协议产生上述问题的原因,提出新的组播转发树构建方式,通过模拟试验对其进行验证。结果表明,改进的HBH协议对路由路径变化具有良好的适应能力,并在本地具备较好的组播效果。

Hop By Hop（HBH） multicast routing protocol has many invaluable features such as low memory requirement and high scalability, but it can not adjust its forwarding tree well when some routing paths are changed, and local multicast efficiency in HBH is low. This paper analyzes HBH protocol, explains the cause of the above shortages, and brings forward some ways and mechanisms to improve HBH protocol. Experimental result proves that the modified HBH overcomes the drawbacks above.