多播路由在无线网络中的OPNET建模与性能测试  

Multicast routing modeling and performance testing with OPNET in wireless network

作　　者：许鑫[1] 何泾沙[2] 石恒华[1] 

机构地区：[1]北京工业大学计算机学院,北京100022 [2]北京工业大学软件学院,北京100022

出　　处：《计算机工程与应用》2008年第26期122-125,共4页Computer Engineering and Applications

基　　金：北京市自然科学基金No.KJ200610005003~~

摘　　要：多播路由技术凭借其有效节省网络带宽的优势,已成为研究无线多媒体网络服务质量(QoS)的热点内容。其中协议独立多播稀疏模式(PIM-SM)是域内多播路由协议中常见的协议。使用OPNET平台进行基于IEEE802.11无线局域网的仿真实验,首先对单播路由和PIM-SM多播路由在吞吐量上进行比较,实验结果表明多播路由在带宽的利用率上具有明显的优势。然后对文件传输、数据库访问、网络电话和视频会议等多媒体业务,进行单播路由和PIM-SM多播路由对比仿真实验,并且从延迟、延迟抖动和丢包率等方面给出结论,为真实无线多媒体网络环境的搭建提供一个很好的参考。Multimedia routing technology with its advantage of saving bandwidth,has received a great deal interest in the field of wireless multimedia network QoS.PIM-SM is currently the preferred intra-domain multicast routing protocol.In this paper,IEEE802.11 LAN experiments are made by using OPNET simulation environment.Firstly,by comparing unicast routing with multicast routing on throughput,it shows the advantage of multicast on bandwidth; then the models of four multimedia services,including database,file transfer,VoIP and video conference,are respectively established with unicast routing and PIM-SM,and the analysis of simulation result on delay,jitter and loss ratio are given.The experiments give a good reference for building real wireless multimedia network.

关 键 词：无线局域网 多播路由 多媒体业务 OPNET平台 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]