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NTT and NTT DOCOMO are working together to implement "5G Evolution & 6G powered by IOWN," a combination of 6th-generation mobile communication system (6G) networks and the Innovative Optical and Wireless Network (IOWN).In this article, we introduce NTT Network Innovation Laboratories' initiatives for the IOWN/6G era, including orbital angular momentum multiplexing transmission technology in the sub-terahertz band for ultra-high-speed, large-capacity communications and underwater acoustic communication technology for extreme coverage extension.
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Sasaki et al. (2024) studied this question.
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