PRP-monitoring-frame-based Redundant Network Monitoring Method of Vehicle-ground Wireless Communication for Urban Rail Signal System
In scenarios where different vehicle ground wireless communication standards are adopted for urban rail transit lines,the signal system vehicle ground wireless communication redundant network constructed based on the Parallel Redundancy Protocol(PRP)has the problem of difficulty in monitoring single link transmission faults.By analyzing the different scenarios and requirements of wireless communication between vehicles and ground in the CBTC system,and based on a thorough study of the data structure and working mechanism of IEC 62439-3 monitoring frames,a monitoring method is proposed to periodically send monitoring frames to monitor the status of redundant communication network node chains.The monitoring mechanism and algorithm flow are constructed,and the monitoring method is tested and network load impact analysis is conducted.The results show that the monitoring frame can monitor the communication status of the data link and the transmission of monitoring frame data has little impact on the existing network,verifying the feasibility of this method in real-time monitoring and rapid fault location of parallel redundant networks for urban rail signal systems.
万方数据
维普
