One of the most important scenarios for mobile communications is to allow users to receive mobile signals in a stable manner at high speeds, and seamlessly switch from one base station to another base station. Recently, Japan NTT Docomo, NEC, etc. The enterprise used an GT-R with a speed of 305 km/h to conduct experiments and successfully transmitted data between two 5G communication devices. On the other hand, the experiment also succeeded in switching between base stations when walking at a speed of 290 km/h. And successful in walking 200 kilometers per hour, to achieve real-time video streaming 4K image transmission.
In this experiment, users are expected to use the 5G service in a high-speed moving environment such as high-speed rail, using a Nissan GT-R as a carrier, and the racing team to perform special conversions into ultra-high speed experimental vehicles. Since the frequency of 28Ghz is greatly reduced, It is also difficult to cover the characteristics of long-distance coverage. Therefore, a beamforming technology (beamforming technology) is used in the transmission station set on the racing track, and a beam tracking technology is used in the mobile base station installed on the racing car. To achieve the success of data transmission and achieve high-speed 5G connection.
In addition to successful communication at a speed of 305 km/h, this experiment succeeded in switching between two 5G base stations on the circuit and switching from base station 1 to the 290 km/h walking speed. Base station 2 transmits data to each other. In the case of 293 km/h walking speed, 1.1 Gbps data transmission is realized, and 4K image quality is streamed from the camera in the car to the base station.
