成都地铁1号线信号系统车地无线改造工程方案

Vehicle-ground Wireless Renovation Project of Signaling System for Chengdu Metro Line 1

基于1.8 G Hz专用频段的LTE-M车地无线系统,在安全性、时延、通信质量、覆盖范围、对更高速度的适应性和互联互通方面均优于WLAN制式,已成为承载信号系统CBTC业务的标准配置。以不影响既有线运营为切入点,分析LTE-M制式替换WLAN制式不同阶段的关键要素,提出城市轨道交通信号系统车地无线改造方案,为同类工程提供参考。

LTE-M vehicle-ground wireless system based on 1.8 GHz dedicated frequency band is superior to WLAN in terms of security,delay,communication quality,coverage,adaptability to higher speed and interconnection.It has become the standard configuration for carrying CBTC service of signaling system.This paper analyzes the key elements in different stages of LTE-M replacing WLAN without affecting the operation of existing lines,and puts forward the vehicleground wireless system renovation scheme of urban rail transit signaling system,which provides reference for similar projects.