基于NS的DiffServ组播网络设计与仿真

Design and Simulation of Multicasting over DiffServ Network Based on NS

随着组播和区分服务在Internet上大规模的应用,两者的结合是一个必然趋势。但是,由于区分服务模型与组播结构上的差异,二者的集成会产生一些新的问题。文章详细分析了DiffServ网络中进行组播传输可能出现的问题以及相关解决方案,采用一种RBRMM机制有效地解决了被忽视的预留子树和异构组播组问题,最后在NS中进行仿真。实验表明:RBRMM机制在DiffServ组播网络拥塞时能够获得不同等级的服务质量保证,是一种扩展性很好的解决方案。

Differentiated Service(DiffServ) and Multicast are scalable for deployment in current Internet.Thus,the combination of DiffServ and Multicast presents a very attractive strategy to backbone network providers.This paper illustrates the related problems which will arise when IP multicast is used in Diffserv networks,and presents solutions,focuses on the design and implementation of the RBRMM mechanism.Finally,its effectiveness is illustrated by performing a simulation using Network Simulator(NS).The results s...