NTT DOCOMO, announced today that a recent 5G trial it conducted with Nokia Networks achieved data speeds of over 2Gbps in a live enviroment. The trial at a high-rise complex in Tokyo used millimeter-wavelength signals with an extremely high frequency of 70GHz. This is a key development for the eventual commercial use of 5G wireless technology in actual-use environments, said DOCOMO. The trial used two new technologies: beamforming, which focuses radio waves in a specific direction, and beam tracking to control beam direction according to the mobile device's location.
In a separate trial with Samsung Electronics in Suwon-city, South Korea, DOCOMO recorded a maximum data-receiving speed of more than 2.5Gbps in a vehicle travelling with a speed of 60km/h. The trial used a 28GHz high-frequency signal in combination with beamforming with a high number of antenna elements and beam tracking.
The foloowing are the other initiatives in this space by the Operator:
DOCOMO and Ericsson verified the feasibility of massive multiple-input multiple-output (MIMO) technology by achieving a real-time data-receiving speed of more than 10Gbps using Ericsson 5G radio prototypes with a 15GHz frequency band.
DOCOMO and Fujitsu confirmed a multi-base-station cooperative transmission system by achieving a data-receiving speed of over 11Gbps in total of four mobile devices with a 4.6GHz signal.
An outdoor data transmission trial conducted by DOCOMO, DOCOMO Beijing Communications Laboratories and Huawei Technologies achieved a multi-user MIMO (MU-MIMO) transmission of 43.9bps/Hz/cell, which was 3.6-times more efficient than past outdoor trials of LTE-Advanced based MU-MIMO technology.
