CBTC系统WLAN车地无线通信网络在线监测关键技术及应用  

Key Technologies and Applications of WLAN Vehicle-ground Wireless Communication Network Online Monitoring of CBTC System

作　　者：卢丹蕾 李士寒 LU Danlei;LI Shihan

机构地区：[1]北京市地铁运营有限公司通信信号分公司,北京100082 [2]上海中铁通信信号测试有限公司,上海200435

出　　处：《铁道通信信号》2024年第10期65-73,共9页Railway Signalling & Communication

基　　金：北京市地铁运营有限公司通信信号分公司大修项目(2019-08-02-003);北京市地铁运营有限公司通信信号分公司定期修项目(地通号安质〔2021〕289号)。

摘　　要：目前国内大部分城市轨道交通车地无线通信系统仍采用IEEE 802.11 b/g协议,工作在2.4 GHz ISM开放频段,车地通信故障易造成列车紧急停车等情况。针对目前车地无线通信监测完整性和实用性不足、全链条监测手段缺乏等问题,结合无线通信系统范围广、场景多、故障现象迷惑性强等特点,融合无线场强采集、数据流监听、无线图谱定位、贝叶斯网络故障等定位技术,利用软硬件结合的方式构建全链条车地无线智能分析监测系统。采用射频处理单元+运行处理单元软硬件分离的架构模式设计无线监测终端,采用C/S架构和人工智能技术设计车地无线智能分析监测系统,实现从车载到轨旁无线场强、漫游切换、多信道监测等智能分析功能。该系统已在北京地铁亦庄线、昌平线、10号线等多条线路上应用,运用效果良好,满足现场无线监测需求,大幅提升了车地无线通信监测能力及应急处置响应效率,对保障列车运营安全具有重要意义。In most of the domestic urban rail transit,IEEE 802.11 b/g protocol working in the 2.4 GHz ISM open frequency band is still used for vehicle-ground wireless communication systems.Vehicle-ground communication failures tend to cause emergency stops of trains and other incidents.In response to the current lack of integrity,practicality,and full-chain methods in vehicle-ground wireless communication network monitoring,an full-chain vehicle-ground wireless intelligent analysis and monitoring system is developed by combining software and hardware and integrating key technologies including wireless field strength collection,data flow monitoring,wireless graph positioning,and Bayesian network fault positioning based on the characteristics of wide range,multiple scenarios,and low discriminability of fault phenomena in wireless communication systems.A wireless monitoring terminal is designed using the architectural pattern separating the software and hardware of the RF processing unit and the operating processing unit.A vehicle-ground wireless intelligent monitoring and analysis system is designed using a C/S architecture and artificial intelligence approach to realize full-chain wireless intelligent analysis functions such as wireless field strength measuring,roaming switching,and multi-channel monitoring from the vehicle to trackside.The system has been applied on Beijing Subway's multiple lines,including Yizhuang Line,Changping Line,and Line 10.It functions well to meet the on-site wireless monitoring needs,greatly improves the wireless communication monitoring ability and emergency response efficiency between the train and the ground,which is of great significance for ensuring the safety of train operation.

关 键 词：基于通信的列车控制系统 车地无线通信 无线局域网 无线图谱定位 贝叶斯网络 人工智能 智能监测分析系统 

分 类 号：U285.41[交通运输工程—交通信息工程及控制]