总结了专用于城市轨道交通车地通信的WLAN(Wireless Local Area Network,无线局域网)和 4G LTE-M(Long Term Evolution for Metro,城市轨道交通长期演进)主要承载的业务,提出了LTE-M综合承载列车运行控制、视频监控、集群调度等多业务网络结构；分析了当前城轨公网5G技术的应用情况；针对城市轨道交通业务需求和发展探讨了专网5G技术的构建并设计了网络方案,最后对该过程存在的主要问题提出了相关解决方法和手段。
The main services carried by WLAN (Wireless Local Area Network) and 4G LTE-M (Long Term Evolution for Metro) dedicated to urban rail systems are Summarized; the network structure that the LTE-M system integrated carried train operation control, image monitoring and trunking dispatching is put forward. The current application of 5G technology in urban rail transits is analyzed, the deployment of 5G in train-to-ground wireless communications systems is discussed according to the needs of services in urban rail and network project is designed. At last the relevant solutions and means for the main problems in the process are proposed. .