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Paper Abstract and Keywords
Presentation 2026-06-17 09:55
Optimization of Channel State Feedback Volume Using Spatial Correlation Between Devices in Multi-AP Coordination
Mariko Ishikawa, Takanori Hara, Hiroaki Hashida, Yuichi Kawamoto, Nei Kato (Tohoku Univ.), Yoshio Urabe, Hiroyuki Motozuka (Panasonic IP) RCS2026-26
Abstract (in Japanese) (See Japanese page) 
(in English) In recent years, as access points (APs) have become denser in wireless local area networks (WLANs), multi-AP coordination has attracted attention for mitigating inter-AP interference.Coordinated beamforming (Co-BF), a type of multi-AP coordination function, mitigates interference between APs and improves throughput by forming beams and nulls toward surrounding stations (STAs). While acquiring channel estimation (CSI) is necessary to form appropriate beams and nulls, CSI feedback overhead increases with AP density.
Conversely, control methods that reduce this overhead lower the instantaneous throughput compared to Co-BF.
To this end, this study proposes a communication control method based on channel correlations among STAs to maximize an actual throughput that considers both instantaneous throughput and overhead.
Keyword (in Japanese) (See Japanese page) 
(in English) Multi-AP Coordination / Co-BF (Coordinated Beamforming) / CSI (Channel State Information) Feedback / / / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 72, RCS2026-26, pp. 5-10, June 2026.
Paper # RCS2026-26 
Date of Issue 2026-06-10 (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 RCS2026-26

Conference Information
Committee RCS  
Conference Date 2026-06-17 - 2026-06-19 
Place (in Japanese) (See Japanese page) 
Place (in English) The Ohama Nobumoto Memorial Hall 
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 2026-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Optimization of Channel State Feedback Volume Using Spatial Correlation Between Devices in Multi-AP Coordination 
Sub Title (in English)  
Keyword(1) Multi-AP Coordination  
Keyword(2) Co-BF (Coordinated Beamforming)  
Keyword(3) CSI (Channel State Information) Feedback  
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1st Author's Name Mariko Ishikawa  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Takanori Hara  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
3rd Author's Name Hiroaki Hashida  
3rd Author's Affiliation Tohoku University (Tohoku Univ.)
4th Author's Name Yuichi Kawamoto  
4th Author's Affiliation Tohoku University (Tohoku Univ.)
5th Author's Name Nei Kato  
5th Author's Affiliation Tohoku University (Tohoku Univ.)
6th Author's Name Yoshio Urabe  
6th Author's Affiliation Panasonic Intellectual Property Management Co., Ltd. (Panasonic IP)
7th Author's Name Hiroyuki Motozuka  
7th Author's Affiliation Panasonic Intellectual Property Management Co., Ltd. (Panasonic IP)
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Speaker Author-1 
Date Time 2026-06-17 09:55:00 
Presentation Time 10 minutes 
Registration for RCS 
Paper # RCS2026-26 
Volume (vol) vol.126 
Number (no) no.72 
Page pp.5-10 
#Pages 6 
Date of Issue 2026-06-10 (RCS) 

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