In the joint trials, the partners will utilize 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 a high-speed communication technology with radio wave propagation that is not affected by obstacles. The companies further aim to develop a high-frequency wireless device that utilizes a compound semiconductor.
6G networks are expected to further accelerate the digitization of society and provide essential solutions to complex societal issues. To this end, global R&D activities focus on further advancing the high-speed, large-capacity, low-latency, and simultaneous multi-connection features of current 5G networks and aim to realize communications with low power consumption with an eye towards the full-scale launch of 6G networks and services around 2030.
Wider frequency bands play a significant role in realizing high-speed and large-capacity communication exceeding that of current 5G networks. 100GHz and above are promising frequency bands for 6G networks that would enable communication speeds of over 100 Gbps, which is ten times higher than that of current 5G networks. However, radio waves at higher frequencies tend to be more easily affected by obstacles, which makes communication between distant points difficult.
To address this issue, Fujitsu, Docomo and NTT will conduct joint trials of distributed MIMO, a wireless communication technology where multiple sub-terahertz wave antennas are dispersed to simultaneously emit radio waves from multiple directions to a receiving terminal. Through this joint experiment, the three companies aim to develop technology that is resistant to obstruction and realizes stable high-speed wireless communication over 100 Gbps.