August 2023 Vol. 21 No. 882023

https://www.ntt-review.jp/archive/2023/202308.html

View from the Top
Akira Shirahase, Senior Vice President, ExecutiveManager of Technology and Innovation Department, NTTWEST

Front-line Researchers
Yoshitaka Taniyasu, Senior Distinguished Researcher,
NTT Basic Research Laboratories

View from the Top

Akira Shirahase, Senior Vice President, Executive Managerof Technology and Innovation Department, NTT WEST
▼Abstract
NTT WEST continues to take on challenges together with its stakeholders to create
an exciting future by using information and communication technology. Thecompany has redefined the “NTT WEST Spirit” and designated the company
purpose in pursuit of a future in which all people are happy and prosperous. We
interviewed Akira Shirahase, senior vice president and executive manager of theTechnology and Innovation Department, NTT WEST, about his technology strategy
and his mindset as a top executive.

Front-line Researchers

Yoshitaka Taniyasu, Senior Distinguished Researcher, NTT
Basic Research Laboratories▼Abstract

Rising Researchers
Takahiro Inagaki, Distinguished Researcher, NTT Basic
Research Laboratories

Feature Articles
Non-terrestrial Networks for Extreme Coverage Extension
Underwater Acoustic Communication Technology for Wireless Remotely Operated Vehicles
Multi-layer Non-terrestrial Network for Beyond 5G/6G Mobile Communications
Position-control Technologies of Oceanographic Equipment for Ultra-wide-area
Ocean-atmosphere Observation Technology

Green innovation involves creating new solutions to environmental problems andsustainable development, and research and development of innovative technologies
in the fields of the environment, resources, and energy is being conductedworldwide to create a low-carbon and circular society. We interviewed Yoshitaka
Taniyasu, a senior distinguished researcher at NTT Basic Research Laboratories,
who has produced world-class research results concerning functional materials forgreen innovation, about his achievements and attitude as a researcher.

Feature Articles
Non-terrestrial Networks for Extreme Coverage Extension

Underwater Acoustic Communication Technology for
Wireless Remotely Operated Vehicles▼Abstract

Global Standardization Activities
Recent Activities of ITU-T SG13 on Future Networks

Practical Field Information about Telecommunication Technologies
Field Trial of Preventive Measures for Insulation Faults in Aerial Electrical Cables

Toward the 6th-generation mobile communication
system, extreme coverage extension is expected toprovide wireless communication services in the sky, atsea, and in space, which are regions not serviced bymobile communication systems. To achieve extreme
coverage extension to the sea, NTT Network Innovation
Laboratories is investigating higher-speed,longer-distance, and more stable underwater acoustic
communications. In this article, we introduce ourunderwater acoustic communication technology and thefeasibility demonstration of the world’s first fully wirelessremotely operated vehicle applying this technology.

Transducer(for acoustic comm.)

Hydrophone(for acoustic comm.)

Battery(for acoustic comm.)

ROV
Acoustic communication
unit