NTT DOCOMO, INC. and Ericsson (NASDAQ:ERIC) announced today that in a
joint 5G technologies trial, the companies achieved a cumulative 20Gbps
of data throughput in an outdoor environment using the 15GHz frequency
band with two simultaneously connected mobile devices of a downlink bit
rate of over 10Gbps each, on February 21. The data speed satisfies one
of the key requirements for future 5G commercial services.
The companies also succeeded in a separate trial on February 21, data
throughput exceeding 10Gbps at a distance of approximately 70 meters
from the base station, or about 7 times farther than the distance
achieved in a past trial. Moreover, the data transmission exceeding
9Gbps at a distance of about 120 meters from the base station was also
succeeded.
5G will use high-frequency bands, which are inclined to experience
attenuation in speed and capacity as they travel over long distances.
The trial, which took place at the DOCOMO R&D Center in the city of
Yokosuka, Japan, utilized a specification defined jointly by DOCOMO and
Ericsson, and an Ericsson 5G Radio Prototype and user devices, in place
of mobile phones, from Ericsson.
The data speeds were achieved thanks to multi-beam multiple-input
multiple-output (MIMO) technology, which increases data speeds by
multiplexing radio waves simultaneously. Also, by utilizing a
beam-forming technique that incorporates beams, each one consisting of
64 antenna elements to converge highly directional long-distance signals
on a single target, the cumulative 20Gbps throughput was successfully
transmitted.
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