Ad Hoc网络中隐藏节点问题的仿真与分析

Simulation and Analysis of Hidden Node Problem in Ad Hoc Network

隐藏节点问题是Ad Hoc网络技术教学的一个重要内容,它涉及对CSMA/CA协议和RTS/CTS机制这两个重要理论的理解,因此非常有必要通过实验的方式帮助学生学习和理解。利用NS2仿真软件实现对隐藏节点问题的仿真,通过实验展示了隐藏节点问题产生的原因及其带来的危害,分析了CSMA/CA协议的基本工作过程和RTS/CTS机制的基本原理。详细介绍了利用NS2设计隐藏节点仿真实验的关键过程和方法,实验数据的处理以及实验结果的对比分析。实践证明,通过该实验不仅有利于帮助学生理解隐藏节点问题,更有助于学生建立规范的科学研究方法,增强了学生操作动手能力,并激发了学生学习的积极主动性。

Hidden node problem is an important content in Ad Hoc network technology teaching,which involves the understanding of two important theories,CSMA/CA protocol and RTS/CTS mechanism.Therefore,it is very necessary to help students learn and understand by experiment.NS2 simulation software is used to simulate the hidden node problem,and through the experiment,this study presents the causes and the harm of hidden nodes problem,and analyzes the basic working process of CSMA/CA protocol and RTS/CTS mechanism.The key process and method of the simulation experiment,the processing of experimental data and the comparison of experimental results are all described in detail.The experiment is not only helpful for students to understand hidden node problem,but also helpful for students to establish standardized scientific research methods,enhance students’operational ability,and stimulate students’initiative in learning.