5G Experimental Trial of 28 GHz Band Super Wideband Transmission Using Beam Tracking in Super High Mobility Environment

The fifth-generation (5G) mobile communication system has attracted much attention to provide various kinds of mobile services and applications for 2020 and later. 28 GHz band is one of the most potent bands for 5G since super wide bandwidth of almost 1 GHz will be available. In the high frequency band, beamforming is mandatory to compensate large path loss. Hence beam tracking mechanism is important to support user mobility, especially users travelling with high speed car or train. In order to clarify the feasibility of the 28 GHz band for mobile communication, we have conducted super high mobility experimental trial targeting up to 150 km/h velocity, by using 5G Massive MIMO (Multiple Input Multiple Output) prototype with beam tracking mechanism. This paper reports results from the super high mobility experiment held in Fuji Speedway, Japan.