摘要
高速列车的LTE无线网络覆盖已经势在必行,高铁LTE无线覆盖的困难主要体现在穿透损耗大、多普勒频移、切换频繁和切换区域变长等方面,针对这些困难,分别从组网方案、切换策略、站间距设置、站轨距计算、小区合并方案、天线设置、网络参数配置、站址布局等方面进行详细分析,给出高铁场景LTE信号覆盖的整体规划思路,最后详细介绍3个典型高铁覆盖场景(U型槽、隧道、铁路桥)的LTE信号覆盖方案。
It is imperative to provide a good coverage of LTE wireless network in high-speed railways. The difficulties of high-speed railway LTE coverage mainly embodies in several aspects,such as a greater penetration loss,Doppler shift,frequent handover,and a variant length of handover zone,etc. Aiming at those difficulties,detailed analysis was provided in the aspect of network scheming,handover policies,the setting of interval between stations,how to obtain the gauge of stations,cell merging schemes,antenna setting,network parameter configuration,and the layout of stations,etc. Then a general planning idea was put forward on LTE signal coverage in high-speed railway scenarios. In the end,three different LTE signal coverage schemes for three corresponding typical high-speed railway coverage scenarios was described in detail,The scenarios are U-shape groove,the tunnel and the railroad bridge.
出处
《邮电设计技术》
2018年第1期76-81,共6页
Designing Techniques of Posts and Telecommunications
