高铁5G NR2.1覆盖方案和特性参数验证

Coverage scheme and characteristic parameters test verification of 5G NR2.1 for high-speed rail

随着5G网络覆盖和技术应用的日益成熟,增强重点场景5G网络感知对提升运营商口碑具有重要意义。近年来三大运营商已开始在高铁场景部署5G网络。对联通和电信而言,NR3.5组网存在投资高、选址难、上行覆盖受限等困难,当前2.1GHz频率从4G重耕到5G,高铁场景部署NR2.1相比NR3.5可提升覆盖、节省投资,实现高铁5G网络快速部署。首先介绍NR2.1与NR3.5在穿损、多普勒频偏、切换三方面的差异和NR2.1设备选型,随后分析NR2.1在高铁场景的链路预算和站址规划,最后介绍高铁特性关联参数和测试验证效果,为高铁场景建设NR2.1提供站址规划和技术方案支撑。

With the increasing maturity of 5G network coverage and technical applications,enhancing the perception of 5G net⁃work in important scenarios is of great significance to improve the reputation of operators.In recent years,the three major operators have begun to deploy 5G networks in high-speed rail scenarios.For China Unicom and China Telecom,the NR3.5 network has difficul⁃ties such as high investment,difficult site selection and limited uplink coverage.As the 2.1GHz frequency is gradually refarming from 4G to 5G,the deployment of NR2.1 in high-speed rail scenarios can improve coverage and save investment compared with NR3.5,so as to realize the rapid deployment of high-speed rail 5G network.Firstly,the differences between NR2.1 and NR3.5 in terms of wear loss,Doppler frequency deviation,switching and NR2.1 equipment selection are introduced.Then,the link budget and site planning of NR2.1 in high-speed rail scenarios are analyzed.Finally,the associated parameters of high-speed rail characteristics are introduced and verified to provide site planning and technical solution support for the construction of NR2.1 in high-speed rail scenarios.