OPNET工业以太网列车通信网络中应用设计
目前国外列车网络技术已经较为成熟，并已广泛应用，而国内在此技术的研究开发较少，相对落后。因此研究基于工业以太网的列车通信网络技术对国内的列车控制技术的自主研发、打破国外技术封锁具有重要意义。32054
本文主要目的是参考现有列车网络模型，建立基于工业以太网的列车通信网络模型，并在OPNET软件中进行仿真，得到的结果可以对当下的列车网络的构建起到一定参考作用。
本中设计了基于工业以太网的列车视频监控网络的拓扑模型。将模型在OPNET软件中实现，创建了列车通信网络、列车车厢节点模型。通过仿真得到参数，如网络延迟、链路占用率等指标，分析网络实时性，验证该模型的可行性与可靠性。
毕业论文关键词：列车通信网络；工业以太网；OPNET
Industrial Ethernet in the application of train communication network design
Abstract：Train communication network is the core part of the train system. It is responsible for monitoring the train, collect and transfer all kinds of information. With the development of modern train high-speed and modernization, the train communication network system is more and more concern and attention, especially in the train communication network using Ethernet, is the development direction of the train communication network.
At present foreign train network technology has been relatively mature, and has been widely used, however, the domestic research and development in the technology is relatively backward. So the train communication network based on industrial Ethernet technology to domestic train control technology of independent research and development, to break the foreign technology blockade is of great significance.
Main purpose of this article is a reference existing train network model, established the train communication network model based on industrial Ethernet, and simulate in the OPNET software, the results can play a reference role to construct the train network.
This design based on industrial Ethernet in the topology model of train video surveillance network. Create the train communication network model, train carriages node model in OPNET software to implement. The parameters obtained by simulation, such as network delay, link occupancy rate indicators, analysis of network real-time, verify the feasibility and reliability of this model.
KeyWords：train communication network；Ethernet；OPNET
目 录
1绪论 1
1.1课题的目的和意义 1
1.2 国内外研究现状 1
1.2.1列车通信网络简介 1
1.2.2 列车通信网络国内外发展现状 3
1.2.3 几种现场总线的特点 4
1.3 本文研究的内容 5
2 以太网协议 6
2.1 以太网简介 6
2.1.1历史 6
2.1.2 概述 6
2.2 以太网特点 7
2.2.1 CSMA/CD协议 7
2.2.2 以太网帧格式 8
2.2.3 工业以太网 8
3 列车通信网络建模仿真 9
3.1 OPNET仿真软件 9
3.1.1 计算机仿真技术 9
3.1.2 OPNET软件介绍 10
3.1.3 OPNET的通信机制 10
3.2 列车通信网络系统概要 11
3.2.1 列车通信网络结构 11