高铁环境下的LTE网络优化研究

Research on LTE network optimization in high-speed rail environment

在高铁场景下,由于信道变化速度较快,其上行信道先验估计不是很准确,因此DRX,频选调度,半静态调度等功能需要在高速场景关闭,同时需要对移动性相关参数、同步参数、传输模式参数、前导码参数等进行特殊的设置,并且高铁场景需要做好专网建设,有针对性的设置专网与公网之间的单向邻区,以保证用户的感知。

In the high-speed rail scenario, due to the fast channel variation speed, the uplink channel evaluation is not very accurate. Therefore, some functions, such as DRX, frequency selective scheduling need to be closed, and mobility related parameters, synchronization parameters, transmission mode parameters and preamble parameters should be set reasonably in high speed environment. Meanwhile, the adjacent cells should be allocated suitably to guarantee the user's perception.