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Paper Abstract and Keywords
Presentation 2026-03-06 09:55
Control of Ground Gateway Antennas for Tracking Aerial UAVs Considering Position-Information Transmission Delay in Temporary UAV Wireless Relay Systems
Takuya Kaneda, Takafumi Fujii (SoftBank) RCS2025-285
Abstract (in Japanese) (See Japanese page) 
(in English) In case of large-scale disasters such as major earthquakes, a system has been proposed to establish service areas in wide regions where mobile communication has been disrupted. This is achieved using wireless relay equipment mounted on unmanned aerial vehicles (UAVs) flying at altitudes above 1,000 meters. Typically, the UAV’s wireless relay communicates with a ground gateway (ground GW) via a feeder link and with terrestrial mobile terminals via a service link. In the feeder link, the use of high-gain narrow-beam antennas is envisaged, and stable communication between the UAV and the ground GW requires precise control of the antenna’s pointing direction, particularly on the ground GW side. We previously proposed a tracking control scheme based on constant angular velocity ON/OFF control and linear prediction. In practice, however, the position information suffers delays due to processing, wireless transmission, and reception-side computation, which can increase tracking angle errors. In this paper, assuming a known and constant delay, we propose a ground GW antenna control method that estimates the UAV position at the reception time and tracks the UAV accordingly, and we evaluate its effectiveness through simulations.
Keyword (in Japanese) (See Japanese page) 
(in English) UAV / ground gateway (GW) / feeder link / antenna control / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 387, RCS2025-285, pp. 152-157, March 2026.
Paper # RCS2025-285 
Date of Issue 2026-02-25 (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 RCS2025-285

Conference Information
Committee RCS SR SRW  
Conference Date 2026-03-04 - 2026-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo University of Science 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To RCS 
Conference Code 2026-03-RCS-SR-SRW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Control of Ground Gateway Antennas for Tracking Aerial UAVs Considering Position-Information Transmission Delay in Temporary UAV Wireless Relay Systems 
Sub Title (in English)  
Keyword(1) UAV  
Keyword(2) ground gateway (GW)  
Keyword(3) feeder link  
Keyword(4) antenna control  
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1st Author's Name Takuya Kaneda  
1st Author's Affiliation SoftBank Corp. (SoftBank)
2nd Author's Name Takafumi Fujii  
2nd Author's Affiliation SoftBank Corp. (SoftBank)
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Speaker Author-1 
Date Time 2026-03-06 09:55:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2025-285 
Volume (vol) vol.125 
Number (no) no.387 
Page pp.152-157 
#Pages 6 
Date of Issue 2026-02-25 (RCS) 

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