Abstract: With the increasing demand for train-ground wireless communication data transmission in rail transit industry, the problem of insufficient bandwidth of train-ground wireless network is becoming more and more serious. Based on the application case of Chengdu Metro Line 18, this paper introduces the system architecture and wireless coverage scheme of train-ground wireless network using LTE-U technology. The test results show that, the train-ground wireless network based on LTE-U can meet the operation requirements.

Key words: LTE-Unlicensed, high speed mobile, reduce co-channel interference

摘要： 轨道交通行业对车地无线通信数据传输需求量的增加，车地无线网络带宽不足的问题日益严重。基于成都地铁18号线的应用案例，介绍LTE-U技术实现车地无线网络的系统架构及无线覆盖方案。测试结果表明，基于LTE-U的车地无线网络能够满足运营需求。

关键词: LTE-U, 高速移动, 降低同频干扰