CBTC系统LTE-M无线专网列车接入单元的研制与应用  

Development and Application of LTE-M Wireless Train Access Unit in CBTC System

作　　者：聂火勇 胡志峰 申文强 唐国平 NIE Huoyong;HU Zhifeng;SHEN Wenqiang;TANG Guoping(Hunan CRRC Times Signal&Communication Co.,Ltd.,Changsha,Hunan 410005,China)

机构地区：[1]湖南中车通信信号有限公司,湖南长沙410005

出　　处：《控制与信息技术》2023年第1期113-118,共6页CONTROL AND INFORMATION TECHNOLOGY

基　　金：湖南创新型省份建设专项(2022TP2003)。

摘　　要：城市轨道交通车地综合通信系统的稳定性是目前地铁正常运营面临的最大问题之一。为提高通信的安全性和可靠性,城市轨道交通无线车地通信由WLAN通信技术升级为长期演进技术(LTE)。文章在综合分析城市轨道交通车LTE技术的基础上,根据CBTC系统城市轨道交通车地综合通信系统(LTE-M)需求规范的要求,研制了一种LTE-M无线专网车地通信设备列车接入单元。其采用1.8 GHz TD-LTE专有移动网络和VPN安全接入技术,在车地间建立起安全可靠的通信链路。经通信打流测试,列车接入单元能够经过专网核心网与地面服务器通信,且通信速率稳定、延时小于150 ms、无丢包现象,可以满足承载CBTC控制业务、乘客信息系统、视频监控系统等数据接入服务要求。The stability of urban rail transit vehicle-ground integrated communication system is one of the biggest problems faced by metro operatings. In order to improve the security and reliability of communication, the wireless vehicle-ground communication technology of urban rail transit has been upgraded from WLAN to long-term evolution technology(LTE). On the basis of comprehensive analysis of the LTE technology of urban rail transit vehicles, a train access unit for the LTE-M wireless private network vehicle-ground communication equipment is proposed, according to the requirements specification of urban rail transit vehicle-ground integrated communication system. It adopts 1.8 GHz TD-LTE proprietary mobile network and VPN security access technology to establish a secure and reliable communication link at the vehicle-ground end. Through the communication beating test, the train access unit can communicate with the ground server through the core network of the private network, the communication rate is stable, the delay is less than 150 ms and no packet loss phenomenon appears. It can meet the data access service requirements of carrying CBTC control service, passenger information system, video surveillance system, etc.

关 键 词：基于通信的列车自动控制(CBTC) 城市轨道交通车地综合通信系统(LTE-M) 虚拟专用网络(VPN) 列车接入单元 

分 类 号：U284.48[交通运输工程—交通信息工程及控制]