无线ATM通信网络仿真及性能研究

【作者】 郑相全；

【导师】 郭伟；

【作者基本信息】 电子科技大学 ， 通信与信息系统， 2001， 硕士

【摘要】 众所周知，ATM作为宽带综合业务数字网（B-ISDN）的传输与交换技术，可以应用相同的网络技术支持现有通信网的所有电信业务，如低速电路交换业务、分组数据业务和多媒体业务，并支持未来可能出现的电信业务。为实现无缝隙B-ISDN，使用户在移动中也能得到服务，近年来人们开发研究了一些基于无线ATM的宽带无线通信系统。 基于W-ATM的无线宽带网具有多种形式，其中蜂窝无线宽带网的应用将最广泛，但其协议也将最复杂，因为它必须支持一定的移动性。本文的研究也主要是针对这种网络系统。 无线宽带网的基本思想是使移动用户完全结合入基于ATM的有线骨干网如B-ISDN，这就要求在其空中接口直接转移ATM信元。本文研究的网络结构主要就是根据这样的思想建立起来的。本文主要采用工作站仿真的方法对提出的方案进行研究。 本文采用BONeS DESIGNER建立无线ATM网络仿真模型，通过该模型，可以在给定基站信道数情况下评估移动蜂窝系统中引入ATM后的服务等级，收集吞吐量、延时、信元丢失率等统计特性。 本文由五章组成。第一章绪论简述无线ATM技术及其发展，指出本文的主要研究对象；第二章对无线ATM网络仿真系统作一个总体介绍，包括其系统结构、系统实现、系统中的相关协议和算法；第三章介绍采用BONeS DESIGNER设计的仿真系统模型框架结构、系统工作流程、系统仿真参数、系统数据结构等；第四章详述系统的主要仿真程序模块构建思想流程，包括初始化程序模块、移动终端控制程序模块、移动终端业务源程序模块、基站程序模块、移动交换节点程序模块、节点之间链路模块、及统计程序模块共七部分；第五章给出仿真系统的部分仿真结果。 最后对全文的工作进行总结。更多还原

【Abstract】 It is known that ATM is the transmission and switching technology in the broadband integrated services digital network (B-ISDN), it can provide all the existing telecommunication services , such as low speed circuit switch traffics. packet data traffic, multimedia services, etc., and provide the possible services in the future by using the same network techniques. In order to realize the gapless B-ISDN so that the mobile subscribers can be served, people have researched and designed some broadband wireless corimunjcation networks based on the ATM. There are several architectures of broadband wireless communication networks based on the ATM, among which the cellular broadband wireless conmunication networks is the most popular but complexity one. it must support some mobility. We focus on it in this article. The essential ideal of the broadband wireless communication networks is to make mobile users completely combined with the bone wire network based on :he ATM, such as B-ISDN. This demands that the ATM cells must be t:ansferred on the air interface. The network architecture discussed fri this article is fully based on the ideal. We design and analyze the p:oposed scheme by simulation on workstation. We use Block Oriented Network Simulator (BONeS) to model and simulate the ~vireless ATM network. We can get the GOS, throughput, delay, cell loss rate, etc.. from this model. This article consists of five chapters. Firstly, in chapter 1, we briefly describe the wireless ATM technique and its evolution, as well as our focus in this article. In chapter 2, we briefly describe the wireless ATM simulation system. including system architecture, the realization of the system, related protocols and algorithm in the system. In chapter 3, we introduce BONeS DESIGNER simulation model, including the system framework, execution process, system simulation parameters, data ii ) ill structures. Chapter 4 describes the main modules in details, which consists of seven sections. Chapter 5 presents eight simulations and their results. In the end, creativeness and related conclusions in our study are stressed.更多还原