TCN-WTB设备线路冗余控制单元设计

Line Redundancy Control Unit in TCN-WTB Devices

列车通信网TCN是面向控制的连接铁路车载可编程电子设备的分布式数据通信局域网,它是控制、计算机、通信技术等学科的交叉与集成。本文讨论的绞线式列车总线的冗余控制功能用来保证WTB总线系统的高可靠性。文章全面分析了冗余控制功能单元,对线路模式选择,线路受扰信号管理,切换控制,MAU报告进行了详细讨论,对协议中未加限制的内容提出了具体实现方案。最后用状态机控制方式在FPGA上实现设计实现。

Train communication network （TCN） is the local distributing network for data communication on the train, which connects the programmable electronic train devices. It is the crossing and integration of the control, computer and communication technology. This paper focuses on the Line Redundancy Control Unit in TCN-WTB Devices to ensure the high reliability of the systeme. This paper completely analyzes the function of the Line Redundancy Control Unit, especially the line mode selection, the line disturbance signal management, switchover and the Medium Attachment Unit （MAU） report and proposes the method to implement the part that are not restricted by the standard. At last we implement the unit on FPGA using state control.