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Paper Abstract and Keywords
Presentation 2024-06-21 10:20
Study on IRS Control Using Vision-Assisted Beam Management in Sub-Terahertz-Band Communications
Ryuhei Kobayashi, Toshihiko Nishimura, Yasutaka Ogawa (Hokkaido Univ.), Junichiro Hagiwara (Mukogawa Women's Univ.), Takeo Ohgane (Hokkaido Univ.) RCS2024-76
Abstract (in Japanese) (See Japanese page) 
(in English) Extreme highspeed transmission over 100 Gbps is expected in 6G mobile communication system using a sub-Terahertz band of 100–300 GHz. In order to overcome large propagation losses behind an obstacle, intelligent reflecting surfaces (IRSs) attract much attention. A beamforming technique can be used for adjusting phase-shift devices connected to reflecting elements. A codebook contains beam candidates, and we choose the optimum beam giving the largest received power. This is carried out sending pilot symbols. If an IRS has many reflecting elements, the codebook has many beams, and it will take long time to find the optimum beam. This paper proposes a method to reduce the number of beams that we need to use in the codebook. A camera is mounted on an IRS, and it takes a picture in the area where the IRS covers. We assume that a person has user equipment (UE). We apply an object detection algorithm, YOLO, to the camera image, and we detect a person. YOLO produces a bounding box that encloses the person. Because the UE is in the box, we need only to examine the beams in or around the box. It has been shown by experiments that we can reduce the number of beams by about 7% or 10% compared with an exhaustive search.
Keyword (in Japanese) (See Japanese page) 
(in English) IRS / sub-Terahertz band / image information / YOLO / beamforming / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 84, RCS2024-76, pp. 281-286, June 2024.
Paper # RCS2024-76 
Date of Issue 2024-06-12 (RCS) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF RCS2024-76

Conference Information
Committee RCS  
Conference Date 2024-06-19 - 2024-06-21 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English) First Presentation in IEICE Technical Committee, Resource Control, Scheduling, Wireless Communications, etc. 
Paper Information
Registration To RCS 
Conference Code 2024-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on IRS Control Using Vision-Assisted Beam Management in Sub-Terahertz-Band Communications 
Sub Title (in English)  
Keyword(1) IRS  
Keyword(2) sub-Terahertz band  
Keyword(3) image information  
Keyword(4) YOLO  
Keyword(5) beamforming  
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Keyword(8)  
1st Author's Name Ryuhei Kobayashi  
1st Author's Affiliation Hokkaido University (Hokkaido Univ.)
2nd Author's Name Toshihiko Nishimura  
2nd Author's Affiliation Hokkaido University (Hokkaido Univ.)
3rd Author's Name Yasutaka Ogawa  
3rd Author's Affiliation Hokkaido University (Hokkaido Univ.)
4th Author's Name Junichiro Hagiwara  
4th Author's Affiliation Mukogawa Women's University (Mukogawa Women's Univ.)
5th Author's Name Takeo Ohgane  
5th Author's Affiliation Hokkaido University (Hokkaido Univ.)
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Speaker Author-1 
Date Time 2024-06-21 10:20:00 
Presentation Time 10 minutes 
Registration for RCS 
Paper # RCS2024-76 
Volume (vol) vol.124 
Number (no) no.84 
Page pp.281-286 
#Pages 6 
Date of Issue 2024-06-12 (RCS) 

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