基于以太网的列车通信网络及交换机开发

Research on Train Communication Network and Managed Switch Based on Ethernet[HS)]

摘要:

随着列车中大容量设备的增加,高带宽的工业以太网用于列车通信网络已成为一种趋势；生成树冗余与VLAN技术应用在基于以太网的列车通信网络中能有效地保证该通信网络的可靠性、稳定性和实时性,为了支持生成树协议(STP)和VLAN相关协议,设计了一款基于KSZ8995MA的交换机,介绍了其硬件设计和软件实现的关键部分；利用OPNET软件建立生成树冗余链路和冗余链路模型并进行时延仿真,仿真结果表明生成树冗余链路的时延小于冗余链路的时延,有效地提高通信网络的稳定性和实时性。

Abstract:

It has been a trend that the industrial Ethernet with high bandwidth is used for Train Communication Network with the increase of the voluminous device. The reliability, stability and real-time ability of the Train Communication Network based on Ethernet could be effectively guaranteed with the application of the Spanning Tree Redundant and VLAN to it. In order to support the Spanning Tree Protocol (STP) and VLAN related protocols, a switch based on KSZ8995MA is designed. The key parts of hardware design and software implementation are introduced. Meanwhile, the Spanning Tree Redundant Link and Redundant Link are modeled with OPNET. The simulation of time-delay is conducted and the results show that the delay-time of spanning tree redundant links is less than the redundant link and the spanning tree redundant links effectively improve the network’s stability and real-time.