Optimization of lighting environment and user quality in multi-access visible light communication

2023 Fiscal Year Final Research Report

• Project/Area Number: 19K04375
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 21020:Communication and network engineering-related
• Research Institution: Kyoto Institute of Technology
• Principal Investigator: OSHIBA SAEKO 京都工芸繊維大学, 電気電子工学系, 教授 (90372599)
• Project Period (FY): 2019-04-01 – 2024-03-31
• Keywords: 可視光通信 / MIMO / 逐次干渉キャンセラ / ユーザ品質

Outline of Final Research Achievements

In this research, we will achieve stable communication even when many IoT devices are connected simultaneously in environments such as hospitals where electromagnetic communication is restricted.
We have introduced color multiplexing multi-access technology to short-range optical wireless communication using light in the visible light range (wavelength 380nm to 780nm) from lighting using LED (light emitting diode) chips. The aim is to establish the optimization of the user quality of both the environment and the lighting environment.
It has been found that by using machine learning to separate wavelength-multiplexed signals, it is possible to design the intensity of each wavelength (color) more flexibly.

Free Research Field

通信工学関連

Academic Significance and Societal Importance of the Research Achievements

無線インターネットやスマートフォン等の普及による情報伝送需要の急増やIoTによる無線利用の拡大により、既存の無線通信に割り当てられている周波数帯以外の未利用周波数帯の研究が求められている。光波を用いた通信は、ミリ波帯やテラヘルツ波帯などに比べて、高帯域幅を確保できる特徴を持つ。LEDを光源とした可視光通信については、近距離光無線（LiFi）やカメラ通信の研究が中心になされている中で、本研究のようにQoEの確保とマルチアクセス数の拡大を行う研究は独創的であり、将来、可視光通信技術の実用化のブレークスルーとなる可能性を持つ。