城市轨道交通LTE-M无线通信系统跨线漫游方案研究  

Research on Cross-line Roaming Scheme of LTE-M Wireless Communication System in Urban Rail Transit

作　　者：黄霁 HUANG Ji

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海200092

出　　处：《铁道通信信号》2024年第7期71-76,共6页Railway Signalling & Communication

基　　金：上海市政工程设计研究总院(集团)有限公司科研项目(2309-370281-04-01-905201)。

摘　　要：随着各城市轨道交通线网规模的增长,为满足列车跨线运行、多线换乘站统一运营调度等需求,提出LTE-M无线通信系统的跨线漫游通信方案。通过研究3GPP TD-LTE标准架构和LTE-M漫游原理,结合城市轨道交通实际特点,参考LTE-M系列规范,提出线网共建演进分组核心网(EPC)、线路间EPC全连接、增强型归属用户服务器整合、线网EPC虚拟化部署等4种漫游通信实现方案;为进一步指导方案建设及落地实施,从接口设计、线网规划、号码规划等方面进行相关配套设计。在当前受专用频段资源分配等因素影响,城轨领域尚不具备成熟条件开展5G专用无线通信系统大规模建设的情形下,为各城市轨道交通线路LTE-M无线通信系统的建设及改造提供参考。With the expansion of urban rail transit networks of the cities,there is a growing need to satisfy requirements such as train cross-line operation and unified operation and dispatch at multiline transfer stations.This paper proposed a cross-line roaming communication scheme for LTE-M wireless communication systems.By studying the 3GPP TD-LTE standard architecture and LTE-M roaming principles,and considering the practical characteristics of urban rail transit,and referring to the series of specifications for LTE-M,four implementation schemes for roaming communication are proposed:network co-construction of EPC(Evolved Packet Core)in urban rail transit networks,full connection between all EPCs in urban rail transit networks,integration of eHSS(Enhanced Home Subscriber Server),and virtualized deployment of EPC in urban rail transit networks.Additionally,to further guide the construction and implementation of the schemes,relevant supporting designs were made from the perspectives of interface design,planning of urban rail transit networks,and number planning.Given the current constraints such as private frequency band resources allocation,the urban rail transit sector is not yet mature for large-scale deployment of 5G private wireless communication systems.Thus,this paper serves as a reference for the construction and transformation of LTE-M wireless communication systems for urban rail transit lines in various cities.

关 键 词：城市轨道交通 LTE-M 无线通信 跨线漫游 运营调度 综合承载 

分 类 号：U231.1[交通运输工程—道路与铁道工程] TN915.0[电子电信—通信与信息系统]