5G通信网络承载CBTC系统业务的方案研究及现场测试

Scheme Research and Field Test of 5G Communication Network Bearing CBTC System Service

CBTC(基于通信的列车控制)系统是目前城市轨道交通中广泛应用的信号系统,其中的车地无线系统负责承载列控信息。介绍了5G(第五代移动通信技术)的发展趋势和性能特点,分析了CBTC系统的无线通信需求。在上海轨道交通5号线高架线路区段现场测试了不同场景下的5G承载CBTC系统业务的性能指标。测试结果表明:5G带宽、端到端时延、漫游切换等方面的技术指标高于CBTC系统对数据通信系统无线子系统的技术要求,在技术性能上,5G可以用于CBTC系统的业务承载;使用5G切片功能,在极端压力情况下,5G通信网络可优先保证CBTC系统的业务传输,提高了CBTC系统业务传输的高可靠性。

CBTC(communication based train control)system is a widely applied signaling system in urban rail transit,in which the train-wayside wireless system is responsible for carrying train control information.The development trend and performance characteristics of 5G technology are introduced.The wireless communication requirements of CBTC system are analyzed.The performance of 5G bearing CBTC system service under different scenarios is tested at the elevated section of Shanghai Rail Line 5.Field test results show that the technical indicators of 5G bandwidth,end-to-end delay,roaming and other aspects are higher than what CBTC system requires of wireless subsystem of data communication system,and in terms of technical performance,5G can be used for the service bearing of CBTC system.Using 5G slicing function,5G communication network can guarantee the service transmission of CBTC system in highest priority under extreme pressure,improving the high reliability of CBTC system service transmission.