Abstract: Based on the high reliability requirements of vehicle-ground wireless communication system of urban rail transit, this paper proposes LTE-M system redundancy configuration mode, which adopts redundancy mechanism at network level, equipment level and board level, and describes equipment configuration mode and system architecture in detail. It provides reference for improving the reliability of LTE-M system.

Key words: LTE-M, redundancy, network level, equipment level, board level

摘要： 针对城市轨道交通车地无线通信系统的高可靠性要求，提出LTE-M系统冗余配置方式，在网络级、设备级、板卡级3个层面均采用冗余机制，详细说明设备的配置方式及系统架构，为提高LTE-M系统可靠性提供借鉴。

关键词: LTE-M, 冗余, 网络级, 设备级, 板卡级