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2014年杭州地铁4号线率先在业内通过轨道交通乘客信息系统(PIS)招标,使用车-地无线通信(TDLTE)技术建设车地无线专网,用以承载PIS视频直播和车载视频监控业务。本文简述该项目的建设情况以及实际测试结果,在网络建设时,正线采用1785~1805 MHz的20 MHz频率进行组网,上下行子帧配比设置为2∶2,并与800 M TETRA数字集群通信系统共用漏缆。经过测试,各项指标符合设计要求,完全可以满足PIS业务承载需求。2015年7月,杭州地铁首次在全国范围内完成了基于已开通运营线路的轨道交通车辆综合通信系统(LTE-M)综合业务承载测试。通过测试验证3、5、10 MHz以及15 MHz等多个不同频宽下的业务承载能力,为杭州地铁后续线路列车自动控制(CBTC)系统业务的承载提供参考依据。
In 2014, Hangzhou Subway Line 4 took the lead in bidding through the Passenger Information System for Rail Transit (PIS) in the industry to build a wireless private network of vehicle land using the technology of vehicle-to-land wireless communication (TDLTE) to carry PIS live video and car video surveillance. This article briefly describes the construction of the project and the actual test results. During network construction, the main line adopts the 20 MHz frequency of 1785-1805 MHz for networking. The uplink-downlink sub-frame configuration is set to be 2: 2 and is compared with 800 M TETRA Shared digital trunking communication system trunks. After testing, the indicators meet the design requirements, fully meet the needs of PIS business hosting. In July 2015, for the first time, Hangzhou Subway completed the nationwide test of carrying the comprehensive business of rail transit vehicle integrated communication system (LTE-M) based on the opened operation routes. After testing and verifying the service carrying capacity under different bandwidths of 3, 5, 10 MHz and 15 MHz, it provides a reference for carrying the CBTC system services of Hangzhou Subway Line Subsequent Line.