利用NS-3平台分析802.11无线网络协议性能

Analysis of 802.11 Wireless Network Protocol Performance by NS-3 Platform Simulation

该文介绍了802.11无线网络协议的类型,详细分析了NS-3的主要组件和仿真过程。利用NS-3仿真平台编写仿真脚本,模拟实现Sta-AP和ad hoc网络在不同的网络拓扑结构中的性能状况,通过调整AP数量和节点移动速度设置不同的网络环境,并在网络节点上加载不同的路由协议,调整不同的网络性能参数,对NS-3平台特点有了更深的认识。利用Wireshark和NS-3平台的FlowMonitor方法获取网络性能数据,通过对比分析FlowMonitor和Wireshark监测流量的差距,发现FlowMonitor方法本身的局限性,从而有助于现实环境中更科学地选择网络协议部署网络环境。借助于高效的仿真分析平台,最终得到一系列有价值的实验结果,为下一步研究奠定了良好的实践基础。

We introduce the types of 802.11 wireless network protocols and analyze the main components and simulation process of NS-3 in detail.The simulation script is written by NS-3 simulation platform to simulate the performance of Sta-AP and ad hoc networks in different network topologies.By adjusting the number of AP and the speed of nodes to set different network environments,loading different routing protocols on network nodes,and adjusting different network performance parameters,we have a deeper understanding of the characteristics of NS-3 platform.Using Wireshark and FlowMonitor method provided by NS-3 platform to obtain network performance data,the limitations of FlowMonitor method are found after the comparative analysis of the gap between FlowMonitor and Wireshark.It is helpful to choose network protocol for deployment network environment more scientifically in real environment.With the help of efficient simulation and analysis platform,a series of valuable experimental results are finally obtained,which lays a good foundation for further research.