轨道交通行业TDD-LTE基站间时钟同步技术

受限于地铁隧道特殊环境、对既有设备投资保护、平滑升级等条件,在地铁隧道为每台基站设备都安装GPS/北斗接收器实施困难,部分既有工程网络交换设备无网络时钟同步功能,为此本文提出一种轨道交通TDD-LTE基站间时钟同步的技术方案,不需要在每个基站上部署GPS接收器,不增加额外设备,不改变用户网络部署和规划,实现轨道交通沿线基站间的时钟同步,尤其适合老线改造和A、B双网布署,具有实际的工程经济价值。

Clock Synchronization between Base Stations in Rail Transit

Constrained by special environment of subway tunnels,investment protection of existing equipment as well as smooth upgrading,it is difficult to install GPS/Beidou receiver for base station equipment in subway tunnels so that some existing network switching equipment is lack of network clock synchronization function.A technical method of clock synchronization between base stations is proposed,in which neither a GPS receiver is need to deploy for each base station nor additional equipment should be added.Without any change in user network deployment and planning,clock synchronization between base stations along rail transit lines can be achieved.This method is especially suitable for the reconstruction of old line and the deployment of A/B double network with certain economic value in practical engineering.