基于OPNET的列车工业以太网仿真研究

Simulation of train industrial Ethernet on a OPNET-based Communication network

列车通信网络因为其传输速率的限制,无法满足大流量的视频监视和故障诊断信息的传输。工业以太网虽然有大的传输速率,但是实时性和确定性却不能得到保证。本文利用网络仿真软件OPNET建立工业以太网列车通信网络的网络拓扑结构模型、节点的应用层进程模型和链路层进程模型并进行仿真,研究不同载荷和带宽下以太网延时、服务器载荷和链路使用率的变化,结果表明:通过增加网络带宽可明显改善网络的性能。

Because of its restrictions on transfer rate, Train Communication Network can＇t meet the need of high load video surveillance and troubleshooting traffic. Although industrial Ethernet has large bandwidth, real time and deterministic performance can not be guaranteed. This design by using OPNET network simulation software to set up industrial Ethernet network＇s train network topology model, the application layer process node model, process model for link layer and run simulation. Ethernet delay, server load and link point to point utilization under different load and bandwidth is studied. Network performance could be improved by increasing the network bandwidth.