High-speed Internet access in urban rail trains is a major pain point. Huawei and Beijing Jiaotong University have made a breakthrough in this area.The Wi-Fi 6 technology flexed its muscles, reaching 980Mbps at 350km/h.

That's not even a record. It's even 1.4Gbps at 160 kilometers per hour.

Recently, "National Engineering Research Center of Rail Transit Operation Control System" (hereinafter referred to as "Beijing Jiaotong University Rail Transit Engineering Center") released the "Huawei WLAN System High-speed Scenario Laboratory Test Report".

According to the report, Huawei and the Rail Transit Engineering Center of Beijing Jiaotong University jointly completed a test of the urban rail service carrying capacity of the Wi-Fi 6 communication system in the dismounting area of 350km/h high-speed mobile scene.

The test results show that the bandwidth reaches 980Mbps when the train runs 350km/h.It fully reflects Huawei's leading position in the field of urban rail Wi-Fi 6.

According to the Report, in order to verify the availability of Huawei Urban rail Ground Wi-Fi 6 network in high-speed mobile scenarios, Beijing Jiaotong University Rail Transit Engineering Center operated at 120km/h, 160km/h, 200km/h, 260km/h and 350km/h respectively. Using the product combination of Huawei AirEngine X760R-XXE trackside AP and AirEngine 6760-51EI on-board AP, the carrying capacity of Huawei urban rail ground Wi-Fi 6 network on train passenger information system (PIS) and video service was tested.

Urban rail speed up and into the "fully automatic operation" era

With the economic development and the continuous improvement of China's urbanization rate, urban rail transit, as the commuting infrastructure in metropolitan areas, is becoming the first choice for citizens to travel.

In the 14th Five-Year Plan for the Development of Modern Comprehensive Transport System, the state clearly requires "strengthening the construction of intercity transport in key urban agglomerations, promoting the integration of intercity railway and urban rail transit, and reasonably promoting the cross-line operation of rail transit".

With the support of industrial demands and policies, rail transit has developed rapidly, with the highest operating speed in China reaching 160km/h and the highest design speed reaching 200km/h. At the same time, the rail transit gradually entered the "fully automatic operation era".

The high-speed movement and automatic operation of rail transit, the real-time transmission of train passenger information system (PIS), on-board video, arch network detection system and other business data, put forward new challenges and demands to the wireless communication system of vehicle-ground.

Leading the car-ground Wi-Fi 6 network to help the digital transformation of urban rail

Based on its accumulation in WLAN and urban rail transit information construction, Huawei launched Huawei Smart City rail Ground Wi-Fi 6 network solution. Through various technological innovations such as hardware and algorithm, Huawei provides high-speed trains with "high performance, fast switching and easy deployment" Wi-Fi 6 communication for high-speed trains. Specifically:

High performance: Huawei developed high-speed mobile enhancement algorithm with core patents through in-depth analysis of urban rail tunnel signal model.It can realize the transmission bandwidth of 1.4Gbps at 160km/h, 1Gbps at 260km/h, and 980Mbps at 350km/h.

Fast switching: Based on the exclusive five-fold switching optimization algorithm, MBB soft switching technology realizes the channel switching with zero packet loss under high-speed operation, the switching delay is less than 3ms, and the urban rail service is guaranteed without interruption.

Easy deployment: Railside aps are portable and installed in an integrated chassis, which integrates railside aps, antenna feeders, power supply modules, and outdoor protection functions. The installation period is reduced by 67% and delivery efficiency is improved.

Huawei has a deep background in enterprise Wi-Fi and is a major contributor to the Wi-Fi 4 to Wi-Fi 7 protocol standards.

In 2022, Huawei won the WBA Award for "Best Enterprise Wi-Fi Network" for its "All-wireless Car-Ground Communication Solution".

Facing the future, Huawei will continue to deepen the urban rail business scene, make full use of its own technical advantages and experience in digital transformation, work together with customers and partners to explore and practice innovative solutions in the urban rail industry, bring passengers more safe, convenient, efficient, green and economic travel experience, and accelerate the digital transformation of smart urban rail.