基于以太网的列车通信网络性能仿真研究

摘要

给出了一种基于工业以太网的列车通信网络体系结构。在对实际列车业务流量进行建模的基础上，利用网络仿真软件 OPNET 建立了以太网列车通信网络仿真模型，研究了车载工业以太网在进行大容量信息传输过程中的以太网时延、网络载荷、丢包率及以太网的极限流量等关键性能。仿真结果表明：通过合理设置网络参数，以太网可以满足列车通信网络对带宽和数据传输时延的要求，将以太网用于高速列车网络系统具有充分的可行性。%This paper presents a train communication network architecture based on the industrial Ether-net. Based on the actual train traffic modeling as well as the Ethernet network train communication simu-lation modeling established by using network simulation software OPNET,the key performances were stud-ied such as the critical delay,network load,packet loss rate and the ultimate flow of the vehicle Industrial Ethernet in the process of high - capacity information transmission. Simulation results show that a reasona-ble setup of network parameters can make the Ethernet to meet the train communication network band-width and data transmission delay requirements,which shows a full feasibility to use the Ethernet network for high - speed train system.