基于LTE技术的城轨交通综合承载网络方案  

Comprehensive Bearer Network Scheme of Urban Rail Transit Based on LTE Technology

作　　者：常峰 刘雪萍 CHANG Feng;LIU Xueping(Underground Railway Design&Research Institute,China Railway Eryuan Engineering Group Co Ltd,Chengdu Sichuan 610000,China;Passenger Transport Division,Chengdu Metro Operation Co Ltd,Chengdu Sichuan 610000,China)

机构地区：[1]中铁二院工程集团有限责任公司地下铁道设计研究院,四川成都610000 [2]成都地铁运营有限公司客运分部,四川成都610000

出　　处：《铁路技术创新》2022年第3期65-70,共6页Railway Technical Innovation

基　　金：中铁二院工程集团有限责任公司科技开发项目(YDNQ212109)。

摘　　要：基于传统无线局域网(WLAN)技术的车地无线通信方案,在实际运用中存在易受干扰、数据包时延大等问题。通过分析城轨交通各种综合承载业务,创新提出基于长期演进(LTE)技术的综合承载网络方案。采用独享的专用频段资源,优化设计了LTE有线网、车地无线通信网络、隧道及高架无线覆盖、车站级综合供电冗余方案,针对隧道区段存在实体墙的单渡线和高架区段的存车线,提出适应性的无线覆盖方式。该综合承载网络方案可实现在有限频谱资源情况下,承载业务内容以及冗余性设计的创新,同时很好地解决了传统WLAN技术易受外围无线设备干扰等问题,实现板卡级、设备级及系统级的冗余,极大提升了信号系统的可用性与可靠性。The train-ground wireless communication scheme based on traditional wireless local area network(WLAN) technology is prone to be interfered and may encounter significant delay in data package as well as other issues in practical application. The analysis of various comprehensive bearer services of urban rail transit leads to a new proposal where the bearer scheme is built on long-term evolution(LTE) technology. The paper chooses the dedicated frequency band for the upgrade of the LTE wired network, the train-ground wireless communication network, the wireless coverage at tunnels and elevated structures, and the redundancy design for power supply at station. It then adapts its scheme for the single crossovers at tunnels that may be affected by the solid wall(s) nearby and for the parking track at elevated structures. The new plan innovates the bearer service content and redundancy design in case of only limited spectrum resources and resolves the interference concern in the WLAN application. The redundancy at board, equipment and system levels greatly improves the availability and reliability of the signalling system.

关 键 词：城轨交通 信号系统 LTE技术 无线覆盖 综合承载网络 

分 类 号：U285[交通运输工程—交通信息工程及控制]