Research of NS dataflow mechanism and its analyzer implementation  

NS数据流机制及其解析器实现的研究(英文)

作　　者：金烨[1] 樊隽[1] 

机构地区：[1]东南大学计算机科学与工程系,南京210096

出　　处：《Journal of Southeast University(English Edition)》2003年第1期44-48,共5页东南大学学报（英文版）

基　　金：The Natural Science Foundation of Jiangsu Province (BK2001205).

摘　　要：This paper analyzes the main elements in NS network simulator, makes adetailed view of dataflow management in a link, a node, and an agent, respectively, and introducesthe information described by its trace file. Based on the analysis of transportation and treatmentof different packets in NS, a dataflow state machine is proposed with its states exchange triggeringevents and a dataflow analyzer is designed and implemented according to it. As the machine statefunctions, the analyzer can make statistic of total transportation flux of a specified dataflow andoffer a general fluctuation diagram. Finally, a concrete example is used to test its performance.分析了Ns(network simulator)仿真器的主要元素,介绍了它的结点、链路以及代理对数据流的处理方式和流程,描述了在脚本文件中识别和采集数据流的方法.基于仿真结果表示的方法,得到了解析数据流的状态,并构造了相应的转移事件和状态机,实现了针对指定流类型统计网络中任意结点流量的分析器,在一个NS应用中,通过分析器产生了统计结果,证明了该设计的可行性和有效性.

关 键 词：network simulation NS simulator dataflow analysis state machine 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] TP391.9[自动化与计算机技术—计算机科学与技术]