基于V2V网络的城市轨道交通综合监控系统设计

Design of Integrated Monitoring System of Urban Rail Transit Based on V2V Network

针对PSCADA综合监控系统与PA广播综合监控系统数据包过期大量丢弃而导致碰撞概率高的问题,设计了基于V2V网络的城市轨道交通综合监控系统.系统硬件结构综合决策层负责信息决策;监控层结合数字化网络监控系统,对交通线路的运营进行监测;网络层部署V2V网络通信平台和网关,监测通信链路故障;维修层负责收集现场信息及设备的维修与管理.信道占用模式用于信道管理和信道访问控制;通过最小竞争窗口消除信息,避免信息传递中的冲突;制定监测数据传递流程,对异常信息进行预警.实验结果表明:系统数据包最小碰撞概率为0.05,最大过期概率为0.27.该系统监控效果良好.

In view of the problem that the data packets of PSCADA integrated monitoring system and PA broadcasting integrated monitoring system are discarded after expiration,which leads to high collision probability,the design of integrated monitoring system of urban rail transit based on V2V network is proposed.The comprehensive decision-making layer of the system hardware structure is responsible for information decision-making,while the monitoring layer operates and monitors traffic lines with the combination of the full digital network monitoring system.The network layer deploys the V2V network communication platform and gateway to monitor the fault of communication link.Maintenance layer is responsible for collecting site information and maintenance and management of equipment.Channel occupancy mode is used for channel management and channel access control,eliminating the information through the minimum competition window,avoiding the conflict in the information transmission,developing the monitoring data transmission process,and giving early warning to the abnormal information.According to the experimental results,the minimum collision probability and maximum expiration probability are 0.05 and 0.27 respectively,and the system has a good monitoring effect.