智能铁路条件下5G-R采用TDD制式的可行性研究  

Study on Feasibility of 5G-R Based on TDD for Intelligent Railways

作　　者：张祯 李坚 陈晓辉[4] 王开锋 ZHANG Zhen;LI Jian;CHEN Xiaohui;WANG Kaifeng(Department of Industry and Information,Tianjin Polytechnic College,Tianjin 300400,China;Department of Communication and Signal,China Railway Beijing Group Co.,Ltd.,Beijing 100860,China;Nanjing Ticom Techology Co.,Ltd.,Nanjing 210039,Jiangsu,China;Department of Electronic Engineering and Information Science,University of Science and Technology of China,Hefei 230026,Anhui,China;Signal and Communication Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)

机构地区：[1]天津工业职业学院工业与信息化系,天津300400 [2]中国铁路北京局集团有限公司电务部,北京100860 [3]南京泰通科技股份有限公司,江苏南京210039 [4]中国科学技术大学电子工程与信息科学系,安徽合肥230026 [5]中国铁道科学研究院集团有限公司通信信号研究所,北京100081

出　　处：《铁道运输与经济》2023年第5期105-111,134,共8页Railway Transport and Economy

基　　金：中国国家铁路集团有限公司科技研究开发计划课题(P2021G012)。

摘　　要：5G-R作为智能铁路的重要组成部分,为铁路基础设施智能监测、智能运维和智能运输等的建设及持续演进提供了大带宽、低时延和广连接的通信支撑。通过分析智能网络10种铁路应用业务通信模型对5G-R在应用业务承载和带宽等方面的需求,结果表明采用TDD制式构建5G-R通信系统在空口标准化和自适应化、网络延展性等方面具有技术优势,能够很好地满足铁路业务对车地通信服务质量的需求类型多、差异性大的特点,以及适应车地通信上下行带宽、速率需求不平衡不对称的特征。试验结果显示:采用TDD制式构建5G-R在频率资源调度方面具有更好的灵活性,在综合提高频谱资源利用效率方面具备独特优势,能够很好地适应350 km运营时速的高速铁路运用场景。As a key part of intelligent railways,5G-R provides the strong communication capability of large bandwidth,low latency,and wide connection for the construction and development of intelligent monitoring,intelligent maintenance,and intelligent transportation of railway infrastructure.The requirements of 10 communication models of railway application services in an intelligent network for 5G-R were analyzed in terms of application service carrying capacity and bandwidth.The results show that the 5G-R communication system constructed by time division duplex(TDD)standard has technical advantages in air interface standardization and self-adaptation,as well as network scalability,which can well meet the various and different requirements of railway services for train-to-ground communication service quality.In addition,the 5G-R communication system can adapt to the characteristics of the unbalanced and asymmetric up/downlink bandwidth and rate requirements of train-to-ground communication.The experimental results show that the 5G-R system constructed by TDD standard is more flexible in frequency resource scheduling.It has unique advantages in comprehensively improving the utilization efficiency of spectrum resources and can well adapt to the application scenario of high speed railways with an operating speed of 350 km/h.

关 键 词：铁路5G专用移动通信系统 智能铁路 时分双工 频分双工 多入多出 

分 类 号：U285[交通运输工程—交通信息工程及控制] TN929.53[交通运输工程—道路与铁道工程]