铁路时间同步架构对5G-R的支撑  

Support for 5G-R with Time Synchronization Architecture for Railway

作　　者：滕蕾 Teng Lei

机构地区：[1]北京铁路通信技术中心,北京100038

出　　处：《铁道通信信号》2021年第9期48-51,57,共5页Railway Signalling & Communication

摘　　要：5G网络作为铁路的新型基础设施,其可靠性和稳定性直接影响所承载的各类业务的安全运行。铁路专用移动通信系统面临从当前的2G(GSM-R)网直接向5G演进,其中5G网络时间同步系统规划关系到5G网络的传输性能与稳定性。通过研究铁路时钟(频率)同步网、时间同步网、骨干传输网、骨干数据通信网及多条客运专线的网络规划、部署和运维,对铁路时间同步技术的现状与演进方向进行总体把握,探讨铁路时间同步架构对铁路5G专用移动通信系统(5G-R)的支撑作用。5 G network serves as a new infrastructure in railway, its reliability and stability might directly affects the safe operation of all the services over 5 G network. The railway dedicated mobile communication system is evolving from current 2 G(GSM-R) network to 5 G network. So, the planning of time synchronization system of the 5 G network is related to the transmission performance and stability of the 5 G network. Through studying the network planning, deployment, and operation and maintenance of the clock frequency synchronization network, time synchronization network, backbone transmission network, backbone data communication network and several passenger dedicated lines, an overview of the current situation and evolution direction of time synchronization technology in railway is concluded and the support of railway time synchronization architecture for 5 G-R is expounded.

关 键 词：铁路专用移动通信系统 传输网 数据通信网 时钟(频率)同步网 时间同步网 PTP(精密时间协议) 

分 类 号：U285.5[交通运输工程—交通信息工程及控制]