Hot_backup Design Of Gateway Module

With the rapid development of China’s railway industry, innovation requirements ofrailway technology are more and more urgent. For example, Traditional GWM module(Its full name is Gateway Module, i.e. the gateway) does not have a fault detectionmechanism, when the module is broken, communication among the device will beaffected and even there is no communication. So, the operation of the train may be verydangerous, the technician must stop the train, turn off the power, and then replace thefaulty module to guarantee the normal operation of a train. In this case, the fault detectionand repair module is passive, it is very time consuming, and real-time performance ispoor. Based on this, hot backup technology of GWM module needs to be designed; it caneliminate the disadvantages of traditional fault detection methods, achieve real-timemodule fault detection, high efficiency and safety.This design uses PowerPC and FPGA as the design platform, and the GWM moduleincludes MVB module (responsible for MVB bus communication, the main vehicle ofcommunication), the processor module (CPU, responsible for the coordination of theMVB bus and WTB bus communication module (WTB), responsible for thecommunication of WTB bus, mainly WTB communication between devices), PowerPC ismainly responsible for CPU protocol, and the motherboard is with two pieces of FPGA,one is responsible for MVB equipment (multifunction vehicle bus communicationequipment), The other is responsible for WTB equipment (wire train bus equipment)communication, and they realize respective bus data frame receiving protocol. Thisdesign uses FPGA and CPU to detect the status of each other. When detecting equipmentWTB or MVB equipment failure, CPU detects the data or state which comes from FPGA,if the data is not normal, CPU determines the corresponding module fault; when detectingwhether the CPU fault, two block FPGA detect the data or state which comes from CPU,if data is not normal,they determines CPU module fault. The design achieves the WTBequipment fault detection, MVB equipment fault detection and CPU equipment fault detection, real-time and in fault detection to ensure the normal communication among thedevices without human intervention, but also to make a train reach the destinationsmoothly.