EUHT在广州地铁知识城支线中的应用

随着城市高速轨道交通（120 km/h以上）的建设，采用无线局域网技术（802.11ac、802.11n）组建车地宽度网络已很难满足列车高速、高带宽、低时延的要求。EUHT在交通工程中的应用推广为车地宽带网络的选型提供技术支持。对广州地铁知识城支线EUHT的系统结构、技术要求、EBU布点、信号切换、网络同步、设施安装、业务测试等几个方面进行简要介绍。广州地铁知识城支线的应用成果表明EUHT可实现120 km/h速度下单列车30路高清视频图像实时上传，动态带宽达到300 Mb/s，为保障列车安全提供十分重要的技术支持，同时也为160 km/h以上的地铁车地无线宽带网络建设提供重要的技术参考。

Application of EUHT of Guangzhou Metro knowledge city branch line

With the construction of high-speed rail transits (120km/h or above), the use of WLAN technology (802.11ac and 802.11n) to build the Vehicle-Ground network has had difficulty meeting the high speed, high bandwidth, and low delay requirements. The application of EUHT in traffic engineering provides technical support for the selection of Vehicle-Ground broadband network. This article briefly introduces the system structure, technical requirements, EBU layout, signal switching, network synchronization, facility installation, and business testing of EUHT enhanced ultra-high throughput, of the Guangzhou Metro knowledge city branch line. The application results of the Guangzhou Metro Knowledge City branch line show that EUHT can accomplish 30 ways of the real-time uploading of high-definition video images of a single train travelling at 120km/h speed, and a dynamic bandwidth of up to 300Mbps. It provides very important technical support for train safety assurance, and also provides important technical reference for the metro wireless Vehicle-Ground broadband network above 160km/h.