February 2024 Vol. 22 No. 222024

https://www.ntt-review.jp/archive/2024/202402.html

Front-line Researchers

Koji Muraki, Senior Distinguished Researcher, NTT BasicResearch Laboratories▼Abstract
In the field of condensed-matter physics, it is often the case that a theory about aphenomenon is experimentally verified 20 or 30 years after it was proposed. Koji
Muraki, a senior distinguished researcher at NTT Basic Research Laboratories, andhis co-researchers were the first in the world to experimentally observe a
phenomenon similar to Andreev reflection, which occurs at the interface between asuperconductor and normal metal, in a material other than a superconductor. Thisobservation was achieved through research on a many-body effect, which is aphenomenon by which electrons acquire the properties that an individual electron
does not possess by interacting with each other. We asked him about thisachievement, research on the fractional quantum Hall effect (one of many-bodyeffects) that led to this achievement, and his mindset as a researcher engaged inbasic research.

Feature Articles
Recent Developments in the IOWN Global Forum

Latest Activities in the IOWN Global Forum▼Abstract

Front-line Researchers
Koji Muraki, Senior Distinguished Researcher, NTT Basic Research Laboratories

Rising Researchers
Shinobu Saito, Distinguished Researcher, NTT Computer and Data Science Laboratories

Feature Articles
Recent Developments in the IOWN Global Forum
Latest Activities in the IOWN Global Forum
Activities for Detailing the Architecture of the Open APN and Promoting Its Practical Application
Technical Study on IOWN for Mobile Networks
IOWN Data Hub to Become a Reality
DCI Architecture Promoted by the IOWN Global Forum

Global Standardization Activities
Standardization Trends in IEEE 802.11be/bn

Practical Field Information about Telecommunication Technologies
Optical Loss Prediction Tool 1.0 toward Enabling Preventive Maintenance of Optical Fiber Cables

With a view to creating a smart world, theconcept of the Innovative Optical and Wireless
Network (IOWN) aims to create anext-generation communication and computing
infrastructure that features ultra-high capacity,
ultra-low latency, and ultra-low power
consumption. With input from global member
companies, the IOWN Global Forum has beendeveloping technical architectures and use
cases and conducting proof of concept (PoC)
activities and implementation verification. Thisarticle introduces the latest activities of theIOWN Global Forum, as well as the PoC
Reference documents andreference-implementation-model documents thatreflect the results of these efforts.

Interactive Live
Music

Area
Management

Industry
Management

Digital Twin Framework
Wireless connectivity meetingextreme QoS requirements
and high energy efficiency

Efficient and rights-aware
data store/exchange
serviceWide-area sensing
servicePost-quantum security
for data at rest, in motion,and in process

IOWN forMobile Networks

Data Hub

Fiber Sensing

IOWNsec

IOWN Computing: Moving and processing data
while meeting extreme QoS requirements and high energy efficiency
Data-centric infrastructure (DCI)IOWN Networking: Connecting endpoints while achieving deterministic QoS and high energy efficiency
Open All-Photonic Network (APN)

Global Standardization Activities

Standardization Trends in IEEE 802.11be/bn▼Abstract
We introduce the latest trends in the Institute of Electricaland Electronics Engineers (IEEE) 802.11be (11be), which
will be the main standard of the next generation of wireless
local area networks (LANs), and the IEEE 802.11bn (11bn),
the following primary standard of 11be. The IEEE 802.11
standard is the most used unlicensed wireless LAN system
globally, recognized as Wi-Fi. Wi-Fi is implemented in laptop
computers and smartphones, Internet of Things devices, andhome appliances. Its usage models also extend fromconsumer markets to business solutions such as industrial
automation and intelligent agriculture in the 11bn era.

AP MLD 1
AP1

AP2

AP3

AP1
AP2
Link 1 Link 2 Link 3
STA3

STA1
STA2

STA1

STA2

STA3

Non-AP MLD 1

Link 4 Link 5 Link 6
STA4

STA5

STA6

Non-AP MLD 2Transmission paths formed by AP and STA
are independent.

Multiple affiliated APs or STAs in a single MLD coordinate
mutually and execute simultaneous transmissions.

(a) Conventional wireless LAN’s operation(b) Multi-link operation in 11be