公专融合5G车地无线通信系统  

Wireless Communication System of 5G Vehicle and Ground Fused by Public and Private Network

作　　者：李辉 张新波 LI Hui;ZHANG Xin-bo(CICT Mobile Communication Technology Co.,Ltd.,Wuhan 430205,China;Wuhan Hongxin Technology Development Co.,Ltd.,Wuhan 430205,China)

机构地区：[1]中信科移动通信技术有限公司,武汉430205 [2]武汉虹信科技发展有限责任公司,武汉430205

出　　处：《光通信研究》2021年第3期72-78,共7页Study on Optical Communications

摘　　要：第四代移动通信技术(4G)的长期演进技术(LTE)受国内1 785~1 805 MHz专网频段制约,轨道交通对于双网冗余配置和专门业务必须保证稳定的最低带宽要求,这使得LTE-Metro(LTE-M)综合承载系统的服务能力受到很大限制。针对上述问题,文章提出了对4G基站、核心网和车载终端适配器单元(TAU)进行升级,加入第五代移动通信技术(5G)公网非独立(NSA)基站的方案,利用4G专网作为列车自动运行通信控制(CBTC)系统业务的主网络,5G网络作为承载CBTC系统的辅网络,5G基站承载轨道交通专网的大带宽业务,实现了4G专网与5G公网融合以承载通信系统的大带宽需求。The 4 th Generation Mobile Communication Technology(4 G) Long Term Evolution(LTE) is restricted by the frequency band of 1 785 ~ 1 805 MHz private network in China. Rail transit must ensure stable minimum bandwidth requirements for dual network redundancy configuration and special services, which greatly limits the service capacity of LTE-M integrated bearing system. In view of the above problems, we propose to upgrade the 4 G base station, core network and vehicle mounted Terminal Adapter Unit(TAU). and add the 5 th Generation Mobile Communication Technology(5 G) public network Non-Standalone(NSA) base station. Therefore, 4 G private network can be used as the main network of Communication Based Train Control(CBTC) system service, and 5 G network is used as the auxiliary network to carry CBTC system. The 5 G base station can also be used to carry large bandwidth service of rail transit private network. Our propose solution realizes the integration of 4 G private network and 5 G public network to carry the large bandwidth requirements of the communication system.

关 键 词：轨道交通 4G专网 5G公网 无线通信 

分 类 号：TN929.531[电子电信—通信与信息系统]