November 2021 Vol. 19 No. 11112021

https://www.ntt-review.jp/archive/2021/202111.html

View from the Top
Hideaki Ozawa, Chief Operations Officer and Chief
Technology Officer, NTT Research, Inc.

Front-line Researchers
Shiro Saito, Senior Distinguished Researcher, NTT
Basic Research Laboratories

Rising Researchers
Ryo Ishii, Distinguished Researcher, NTT Human
Informatics Laboratories

Feature Articles
NTT DOCOMO’s Initiatives on 5G
evolution & 6G
Trends and Target Implementations for 5G evolution &6G
Research of Transparent RIS Technology toward 5G
evolution & 6G
Research on NTN Technology for 5G evolution & 6G
Improving Communication Performance in High-mobility
Environments by Millimeter-wave Base Station
Cooperation for 5G evolution

Regular Articles
High-gain Optical Parametric Amplifier Module by Using a PPLN Waveguide and Its Application toQuadrature Squeezing
Development of Beyond 100G Optical Cross Connect (B100G-OXC) System

Global Standardization Activities
Standardization Activities in the Asia-Pacific Region—New Management Structure Approved atthe 33rd Asia-Pacific Telecommunity

Information
Event Report: NTT Communication Science Laboratories Open House 2021

View from the Top

Hideaki Ozawa, Chief Operations Officer and Chief
Technology Officer, NTT Research, Inc.
▼Overview
NTT Research focuses on cutting-edge basic research in the fields of quantum
computing, cryptography, blockchain, and medical/health informatics with partners
around the world. Two years after its establishment, it has won several prestigious
awards, including the International Association for Cryptologic Research (IACR)
Test-of-Time Award, SPIE Maiman Laser Award, and IACR Crypto 2020 Best Paper
Award. The institute’s achievements also include solving the 20-year-old problem ofprogram obfuscation. We interviewed Hideaki Ozawa, chief operations officer andchief technology officer of NTT Research, about the progress of research and the artof management.

Front-line Researchers

Shiro Saito, Senior Distinguished Researcher, NTT Basic
Research Laboratories▼Overview
Quantum information technology is attracting attention as a source of technologicalinnovation that will bring about major changes in the future economy and society.
Countries around the world, including Japan, the United States, Europe, and China,
are positioning research and development of quantum information technology as oneof their national strategies. We interviewed Shiro Saito, a senior distinguishedresearcher at NTT Basic Research Laboratories and who is making a significant
contribution to the development of quantum information technology, about theprogress of his research and his attitude as a researcher.

Feature Articles
NTT DOCOMO’s Initiatives on 5G evolution & 6G

Trends and Target Implementations for 5G evolution & 6G

▼Abstract

In Japan, commercial 5th-generation mobile communication systems (5G) services first became available inMarch 2020. Studies of the next generation of communication services (6G) and the telecommunication
technology of the 2030s are now gathering momentum. This article provides a summary of the domestic
and international trends and schedule prospects for 6G research and development, and the 5G evolution &6G concept proposed in the DOCOMO 6G White Paper.

6G

Extreme-high-speed andhigh-capacity communication(Section 3.1)

Extreme low latency(Section 3.4)

• Improvement of communication speed:
Peak speeds of over 100 Gbit/s• 100 times greater capacity (bit/s/m2)• Ultra-large uplink capacity• Extreme low E2E latency of 1 ms or less• Consistently stable low latency

eMBB
Extreme coverage extension(Section 3.2)
• 100% land (area) coverage• Also seek to provide coverage in the sky(up to 10,000 m altitude), at sea (up to 200
nautical miles offshore) and in space
Extreme low power
consumption and cost
reduction (Section 3.3)
• Further reduction of cost per bit• Extreme low power devices that do not
require recharging

5G

URLLC

mMTC

Combination ofrequirements with newuse cases

Extreme-reliablecommunication (Section 3.5)
• Quality assurance for a wide range ofuse cases (reliability improved to sevennines)• High level of security and safety
Extreme massive
connectivity & sensing(Section 3.6)
• 10 million devices per square kilometer• High-precision positioning and sensing(<1 cm)