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Paper Abstract and Keywords
Presentation 2026-03-01 14:50
Interruption-aware Coverage Analysis of Buoy-to-Balloon Communications with Altitude Control in Maritime Sensor Network
Natsuki Fukui, Takeshi Hirai (Osaka Univ.), Tatsuya Iizuka, Naoto Endo, Ryusuke Yamamoto, Yusuke Umemiya, Hiroshi Matsubara (NTT), Naoki Wakamiya (Osaka Univ.) SeMI2025-69
Abstract (in Japanese) (See Japanese page) 
(in English) Accurately forecasting heavy rainfall disasters requires collecting wide-area maritime weather data obtained from ocean buoys intermittently. A low-cost approach to collect these data is a maritime sensor network using altitude-controllable light balloons with only a limited number of altitude controls. This paper analyzes the impact of the altitude controls on the spatial coverage of buoys that do not interrupt their communication links with balloons over an allowable duration in this maritime sensor network. To this end, this paper formulates a buoy coverage maximization problem with wind-dependent trajectories of altitude-controllable light balloons based on altitude controls and solves this problem by a Bayesian optimization-based method. Our simulation results highlighted that the optimally altitude-controlled balloons communicated with 67% of the buoys without an interruption duration exceeding one hour. Our results also showed that optimally altitude-controlled
balloons achieved a 264% larger number of buoys within the allowable interruption than free-floating balloons.
Keyword (in Japanese) (See Japanese page) 
(in English) non-terrestrial networks / maritime sensor networks / balloons / ocean buoys / HYSPLIT / OpenDrift / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 367, SeMI2025-69, pp. 17-22, March 2026.
Paper # SeMI2025-69 
Date of Issue 2026-02-22 (SeMI) 
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)
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Conference Information
Committee SeMI IPSJ-MBL IPSJ-UBI  
Conference Date 2026-03-01 - 2026-03-02 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SeMI 
Conference Code 2026-03-SeMI-MBL-UBI 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Interruption-aware Coverage Analysis of Buoy-to-Balloon Communications with Altitude Control in Maritime Sensor Network 
Sub Title (in English)  
Keyword(1) non-terrestrial networks  
Keyword(2) maritime sensor networks  
Keyword(3) balloons  
Keyword(4) ocean buoys  
Keyword(5) HYSPLIT  
Keyword(6) OpenDrift  
Keyword(7)  
Keyword(8)  
1st Author's Name Natsuki Fukui  
1st Author's Affiliation The University of Oska (Osaka Univ.)
2nd Author's Name Takeshi Hirai  
2nd Author's Affiliation The University of Oska (Osaka Univ.)
3rd Author's Name Tatsuya Iizuka  
3rd Author's Affiliation Space Environment and Energy Labs. NTT (NTT)
4th Author's Name Naoto Endo  
4th Author's Affiliation Space Environment and Energy Labs. NTT (NTT)
5th Author's Name Ryusuke Yamamoto  
5th Author's Affiliation Space Environment and Energy Labs. NTT (NTT)
6th Author's Name Yusuke Umemiya  
6th Author's Affiliation Space Environment and Energy Labs. NTT (NTT)
7th Author's Name Hiroshi Matsubara  
7th Author's Affiliation Space Environment and Energy Labs. NTT (NTT)
8th Author's Name Naoki Wakamiya  
8th Author's Affiliation The University of Oska (Osaka Univ.)
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Speaker Author-1 
Date Time 2026-03-01 14:50:00 
Presentation Time 25 minutes 
Registration for SeMI 
Paper # SeMI2025-69 
Volume (vol) vol.125 
Number (no) no.367 
Page pp.17-22 
#Pages 6 
Date of Issue 2026-02-22 (SeMI) 

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