城市轨道交通信号系统车地无线冗余方案探索

Vehicle-ground Wireless Redundancy Scheme of Urban Rail Transit Signal System

以提升无线系统稳定可靠传输车地信息的能力为切入点,优化车地无线系统冗余架构,增加车地传输链路,并通过无线链路健康状态监测和链路无扰倒换保证信号业务始终在最优的车地无线链路上传输。降低由于无线故障导致车地无线业务中断影响列车稳定运行的概率。通过提高无线系统冗余度,达到提升信号系统的稳定性和可靠性的目的。

The paper focuses on improving the stable and reliable transmission of vehicle-ground information by wireless systems,and puts forward a scheme to optimize the redundant architecture of a vehicle-ground wireless system with additional vehicle-ground transmission links.Wireless link health status monitoring and non-disturbance link switching are used to ensure that the information is always transmitted on the optimal link.The proposed scheme reduces the probability of interruptions in vehicle-ground wireless communication caused by wireless errors aff ecting the stable operation of trains.The stability and reliability of the signal systems of rail transit can be improved by promoting the redundancy of such wireless systems.