Home Radio waves Fujitsu, NTT DOCOMO and NTT to launch joint trials towards practical applications for 6G

Fujitsu, NTT DOCOMO and NTT to launch joint trials towards practical applications for 6G

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Aiming to achieve stable and high-speed communication using a high sub-terahertz frequency range

TOKYO, June 6, 2022 — (JCN Newswire) — Fujitsu announced today that it is entering into a collaboration with NTT DOCOMO, INC. (hereafter DOCOMO)(1) and Nippon Telegraph and Telephone Corporation (hereafter NTT)(2) to carry out joint trials towards the realization of practical applications for 6G. In the joint trials, the partners will use radio waves in the high frequency range (sub-terahertz waves) of 100 GHz and 300 GHz, which represent promising candidates for use in 6G to realize high-speed communication technology with propagation. radio waves which is not affected by obstacles. The companies further aim to develop a high-frequency wireless device that uses a compound semiconductor(3).

Figure: Image of joint trials

Fujitsu positions network technology as an essential element in its efforts to transform the business through digital innovation and ultimately achieve a more sustainable society.

Context and tasks

6G networks are expected to further accelerate the digitalization of society and provide essential solutions to complex societal problems. To this end, global R&D activities focus on improving the high-speed, high-capacity, low-latency and simultaneous multi-connection features of current 5G networks and aim to realize low-power communications with an eye on the full-scale launch of 6G networks and services around 2030.

Wider frequency bands play an important role in realizing high-speed, high-capacity communication beyond that of current 5G networks. 100 GHz and above are promising frequency bands for 6G networks that would enable communication speeds of over 100 Gbps, ten times faster than current 5G networks. However, radio waves at higher frequencies tend to be more easily affected by obstacles, making communication between distant points difficult.

Overview of joint trials

To solve this problem, Fujitsu, DOCOMO and NTT will conduct joint trials of Distributed MIMO(4), a wireless communication technology in which multiple sub-terahertz wave antennas are scattered to simultaneously transmit radio waves in multiple directions to a terminal device. reception.
Through this joint experience, the three companies aim to develop technology that resists clogging and realizes stable wireless communication at high speeds of more than 100 Gbps.

In order to achieve high-speed, high-capacity communications at sub-terahertz waves with small size and low power consumption, Fujitsu aims to develop high-frequency wireless devices using compound semiconductors such as gallium nitride (GaN) and indium phosphorus (InP). In the future, Fujitsu will promote the development of technologies for realizing practical applications for 6G and actively engage in global 6G standardization activities to help solve societal problems through R&D.

Naoki Tani, Executive Vice President and Chief Technology Officer at DOCOMO, commented: “DOCOMO has been collaborating with Fujitsu since 2014 to verify wireless technologies for the realization of 5G, and has leveraged the acquired know-how to providing commercial 5G services since 2020. We are delighted to also collaborate with Fujitsu for the realization of the 6G concept.

DOCOMO and NTT will initiate experimental trials with Fujitsu to establish 6G wireless technologies for sub-THz communication using the 100 GHz and 300 GHz bands, and make strong contributions to 6G commercialization with a variety of industry partners. »

(1) NTT DOCOMO, INC. :
Headquarters: Chiyoda-ku, Tokyo; Chairman and CEO: Motoyuki Ii.
(2) Nippon Telegraph and Telephone Corporation (NTT):
Headquarters: Chiyoda-ku, Tokyo; Chairman and CEO: Jun Sawada.
(3) compound semiconductor:
A semiconductor composed of two or more elements such as GaN (gallium nitride) and InP (indium phosphorus). Since the mobility of electrons is higher than that of silicon semiconductors, high-speed operation is possible.
(4) Distributed MIMO:
A technology that enables high-speed communication by simultaneously transmitting different signals from multiple distributed transmitting antennas and separating received signals by multiple receiving antennas.

Source: Fujitsu Ltd.

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