高铁专网网络问题优化举措及应用研究  

Research on the Optimization Measures and Application of High-speed Railway Private Network

作　　者：徐建林 蒋敬 王开贵 赵平忠 XU Jian-lin;JIANG Jing;WANG Kai-gui;ZHAO Ping-zhong(China Mobile Communications Group Guizhou Co.,LTD.,Guiyang 550000,China;ZTE Corporation Limited,Guizhou Branch,Guiyang 550000,China)

机构地区：[1]中国移动通信集团贵州有限公司,贵州贵阳550000 [2]中兴通讯股份有限公司贵州分公司,贵州贵阳550000

出　　处：《电脑与电信》2024年第6期84-94,共11页Computer & Telecommunication

摘　　要：在高铁专网场景下,由于频切、多普勒效应、车厢穿透损耗等引起的网络问题严重影响着高铁网络用户的业务感知体验。首先,对当前高铁专网中存在的网络问题进行了总结,然后从覆盖问题的解决策略入手,将数字孪生技术应用于高铁专网站点的规划建设中,同时针对站点“灯下黑”的问题创新性地提出了边缘波束协同横滚方案以增强高铁专网的覆盖质量。此外,介绍了基于CPID的超级小区重叠覆盖优化策略,并总结了当前铁路沿线不同场景下的天线选型方案。最后,对由于多普勒效应引起的频偏、公专网协同性差造成的相互干扰和高铁用户网络速率低等感知问题,介绍了相关优化解决策略,并基于VMAX大数据监控平台,结合用户打点轨迹与高铁线路轨迹图,对专网用户高频出专网小区进行精准识别和优化,有效提升了高铁用户的网络感知。The service perception experience of high-speed rail network users is significantly impacted by network issues arising from frequency cutting,Doppler effect,and carriage penetration loss in the context of a high-speed railway private network.This article firstly summarizes the network problems existing in the current high-speed rail private network.Then,starting from the solution strategies for coverage problems,digital twin technology is applied to the planning and construction of high-speed rail private network sites.At the same time,an innovative edge beam collaborative rolling scheme is proposed to enhance the coverage quality of the high-speed rail private network in response to the problem of"dark under the light"at the site.In addition,the paper presents an optimization strategy for achieving super cell overlapping coverage based on CPID,and provides a comprehensive summary of antenna selection schemes tailored to different scenarios along the railway.Finally,this paper presents relevant optimization solutions to address the frequency offset caused by the Doppler effect,mutual interference resulting from differences in public-private network coordination,and the perception of low network speed among high-speed rail users.Leveraging the VMAX big data monitoring platform,combined with user tracking and high-speed rail line trajectory maps,precise identification and optimization of high-frequency private network users leaving private network communities have been carried out,efectively improving the network perception of high-speed rail users.

关 键 词：5G 高铁网络 超级小区 重叠覆盖 干扰 

分 类 号：TN929.5[电子电信—通信与信息系统] U285[电子电信—信息与通信工程]