高铁站场景2100 MHz信道仿真与传播特性分析

Channel simulation and propagation characteristics analysis at 2100 MHz in high-speed railway station scenario

随着铁路通信系统的发展需要和第五代移动通信技术(5G)的快速推进,5G-Railway(5G-R)有望成为铁路通信系统的下一代标准。2100 MHz作为5G-R的潜在频段,其在经典铁路场景中的传播特性亟待研究。构建符合场景典型特征的三维模型,基于射线跟踪仿真法研究半封闭式高铁站台场景2100 MHz无线信道的传播特性。在车站立柱、扶梯旁部署发射机,定义传播模型参数,分别在手持移动设备与车载移动台处进行大量仿真。计算路径损耗、时延扩展、角度扩展等信道特性,为5G-R部署的覆盖功率预测和网络规划与优化提供参考,弥补该频段在铁路应用方面研究的短缺。

With the development of railway communication system and the rapid advancement of 5G technology,5G-R(5G-Railway)is expected to become the next generation standard of railway communication system.As a potential frequency band of 5G-R,the propagation characteristics in classical railway scenarios of 2100 MHz need to be studied urgently.In this paper,a 3D model conforming to the typical characteristics of the scenario is constructed,and the propagation characteristics of 2100 MHz wireless channel in the semi-enclosed high-speed railway platform scene are studied based on ray tracing simulation method.Transmitters are deployed beside columns and escalators.Meanwhile,the parameters of propagation models are defined,and massive simulations are conducted on hand-held and vehicle-mounted mobile devices respectively.Finally,channel characteristics such as path loss,delay spread and angular spread are analyzed respectively,providing a reference for coverage power prediction,network planning and optimization of 5G-R deployment,which makes up for the shortage of research on railway application of this frequency band.