Abstract: This paper summarizes the current situation and existing problems of Beijing Rail Transit wireless communication system construction, sorts out current services and demands for intelligent services, analyzes and compares mainstream wireless communication technology, plans the construction scheme of wireless communication system during the "14th Five-Year Plan", and studies the business application of 5G technology in rail transit.

Key words: one network with two frequencies, integrated carrier, 5G

摘要： 总结北京轨道交通无线通信系统建设现状及存在的问题，梳理目前各项业务及智慧化需求，对主流无线通信技术进行分析比较，规划“十四五”期间无线通信系统建设方案，并研究5G技术在轨道交通中的业务应用。

关键词: 一网双频, 综合承载, 5G