地铁既有站换乘改造通信系统升级方案研究

地铁已形成网络化运营模式，换乘节点越来越多。因为规划等原因，建设较早的地铁线路没有预留后期换乘接入条件。因此，在新线建设过程中，往往伴随着新建站带来的既有车站换乘改造和升级。其中，通信传输系统的改移和升级建设是重点工作之一。通信系统是城市轨道的交通神经，包括公安通信系统，民用通信系统和专用通信系统等，支持控制中心与车站、车辆的信息往来，并为乘客提供稳定的通信服务。针对在既有线运行条件下，换乘站改造带来的通信设备改移以及通信扩容需求等问题进行方案探讨，提出公安传输系统增强型MSTP建设方案和骨干传输系统OTN建设方案。以北京地铁10号线西土城站为例进行方案设计，10号线西土城站与新建地铁昌平线南延(简称昌南线)相交，换乘站建筑结构及功能的改变，对通信系统的设备升级、机房部署等都提出了新的要求，本文将设计方案应用于该换乘项目，验证了所提方案的合理性，研究成果以期为其他既有站换乘改造的通信系统升级提供参考。

Communication Systems Upgrade Scheme for Existing Subway StationTransfer Transformation

As subway construction in China continues, the network operation mode of subway emerges, and more transfer nodesare created. Due to planning and other factors, the earlier-built subway lines did not reserve future transfer access conditions.Thus, when new lines are built, the existing stations often undergo transfer transformation and upgrading along with the newstations. Among the key tasks involved, the communication transmission system transformation and upgrading is crucial. Thecommunication system is the traffic nerve of urban rail, which consists of public security communication system, civil communicationsystem, and special communication system. It supports the information exchange between the control center and the stations and vehicles, and provides stable communication service for passengers. This paper examines the communication roomtransformation and communication capacity expansion requirements resulting from the transfer station transformation underthe existing line operation conditions, and proposes the enhanced MSTP construction scheme for public security transmissionsystem and the backbone transmission system OTN construction scheme. Xitucheng Station of Beijing Metro Line 10 intersectswith the newly built metro Changnan Line, and the transfer station changes in building structure and function have raised newrequirements for the communication system equipment deployment and upgrade. This paper applies the design scheme to thetransfer project, verifies the rationality of the proposed scheme, and the research results offer an application reference schemefor the communication system upgrade of the existing station transfer transformation.