关键词: 城市轨道交通, 数据通信技术, 信号系统, 车-地无线通信, LTE专网, 5G公网

Abstract: This paper conducts detailed research and analysis on the communication scheme based on the redundant fusion of LTE private network and 5G public network communication, considering the circumstances of Lijiang Rail Transit Line 1. For Lijiang Line 1, the LTE private network functions as the main channel for train-wayside transmission of wireless communication data for the signaling system, while the 5G public network serves as the standby channel for sending and receiving data messages between the onboard and wayside signaling equipment in the signaling system, enabling data transmission among wayside control centers, stations and vehicle bases, and between wayside and onboard signaling equipment. The proposed scheme ensures the normal operation of data communication services in the signaling system. This paper elaborately discusses the integration communication solution of LTE private network and 5G public network, providing an important reference for the future development of data communication technology in the urban rail transit industry.

Key words: urban rail transit, data communication technology, signaling system, train-wayside wireless communication, LTE private network, 5G public network