地铁云平台网络架构建设方案研究——以西安地铁为例  

Research on Network Architecture Construction Scheme for Metro Cloud Platforms-A Case Study of Xian Metros

作　　者：李庆刚 LI Qinggang(State Key Laboratory of Rail Transit Engineering Informatization(FSDI),Xi'an 710043,China;China Railway First Survey and Design Institute Group Co.,Ltd.,Xi'an 710043,China)

机构地区：[1]轨道交通工程信息化国家重点实验室(中铁一院),西安710043 [2]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《铁道标准设计》2024年第11期191-200,共10页Railway Standard Design

基　　金：陕西省重点研发计划项目(2020.GY-052);中铁第一勘察设计院集团有限公司科研项目(2021KY40ZD(CYH)-29)。

摘　　要：随着各大城市轨道交通线网的逐步成形,系统集成、资源共享、互联互通等需求日益增加,地铁云平台的建设作用凸显。根据西安地铁线路建设和线网规划情况,通过对云平台建设方案中的灾备模式、数据中心建设和主干网络三个方面进行分析。首先,充分对比主备模式、双活模式、两地三中心模式及异地多活架构的利弊,针对异地多活架构的复杂性,在实现核心业务的异地多活、保证核心数据的一致性基础上,采用多种手段同步重要数据,采用增加数据库副本的架构保证异地多活数据库系统的可用性和容错性;其次,结合西安地铁控制中心的布局,阐述了适合西安地铁线网云平台建设方案的相关思考,充分利用各区域控制中心的地理位置设置分布式云平台机房,构建异地多活架构的云平台数据中心系统,各中心互为备用,不仅可以有效控制云平台机房建设规模和前期投资,而且可以提高云平台系统整体安全性、可靠性、扩展性,便于应用本地化和后期扩容;最后,研究了各控制中心之间的互联光缆通路,充分利用地铁环形线路,在保证两条不同物理径路光缆路由的基础上,建设各区域控制中心之间的互通光缆,不仅节约了光缆建设投资,而且更加有效地提升了云平台系统的安全可靠性。With the gradual formation of rail transit networks in major cities,the demand for system integration,resource sharing,and interconnection is increasing day by day,and constructing metro cloud platforms is becoming very important.Based on the construction and network planning of Xian metro lines,this paper analyzed three aspects of the cloud platform construction scheme:disaster recovery mode,data center construction and backbone network.First,the advantages and disadvantages of disaster recovery mode,active-active mode,two-location three-center model,and remote multi-active architecture were fully compared.Considering the complexity of the remote multi-active architecture,various means were used to synchronize important data on the basis of achieving remote multi-activity for core businesses and ensuring core data consistency.The architecture of adding database replicas was implemented to ensure the availability and fault tolerance of the remote multi-active database system.Second,in conjunction with the layout of Xian metro control centers,relevant considerations for the cloud platform construction scheme suitable for Xian metro network were elaborated.The geographical locations of each regional control center were fully utilized to set up distributed cloud platform computer rooms and construct a cloud platform data center system with a remote multi-active architecture.Each center acted as a backup for the others,which not only effectively controlled the construction scale and initial investment of the cloud platform computer rooms but also improved the overall security,reliability,and scalability of the cloud platform system,facilitating application localization and future expansion.Finally,the interconnection paths of optical cables between control centers were studied,utilizing the metro ring lines.On the basis of ensuring the routing of optical cables through different physical paths,interconnecting optical cables between regional control centers were constructed.This approach not only saves the investment

关 键 词：地铁 云平台 灾备模式 双活模式 异地多活架构 控制中心 分布式系统 主干网络 

分 类 号：U231[交通运输工程—道路与铁道工程] TP393[自动化与计算机技术—计算机应用技术]