基于NS-2网络仿真协议的功能扩展

Function Extension of Network Simulation Protocol Based on NS-2

网络仿真是网络协议设计的重要环节,也是通信网络性能分析的关键。基于C++和Tcl脚本语言分裂层次实现的NS-2是一个开源、面向对象设计的多协议网络仿真软件,在网络仿真领域占有十分重要的地位。文中首先介绍NS-2的体系结构;然后介绍在NS-2环境下如何编程实现新协议,对NS-2功能进行扩展;最后利用前面实现的新协议,结合一个4节点的网络仿真实例,根据仿真结果比较SFQ和DropTail两种队列管理方式在选择数据包丢弃方面的公平性。

It is very important to simulate network in design and performance analysis of network. NS - 2, with advanced C ＋ ＋ split - language and Tel scripting languages programming ides, is an open- source and object - oriented design multiprotocol network simulation software. NS - 2 has a very important position in the area of network simulation. Introduce the architecture of NS- 2 and how to implement new network protocol in detail so as to extend the function of NS - 2. Finally, using earlier implemented protocol,give an example which simulates four nodes of network, and then compare the fairness of SFQ and DropTail queuing when they are choosing the dropping datapacket.