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Paper Abstract and Keywords
Presentation 2025-08-29 15:35
Multi-Beam Scheduling for Uplink and Downlink to Reduce Latency in Data Relay Satellite
Kohei Yoshida, Yohei Hasegawa, Kazushi Sugyo, Kazushi Muraoka, Masayuki Ariyoshi (NEC) SAT2025-50 RCS2025-119
Abstract (in Japanese) (See Japanese page) 
(in English) Toward real-time services with wide coverage in Beyond 5G/6G, Low Earth Orbit (LEO) satellite constellations, which can achieve lower latency compared to geostationary satellites, are increasingly expected to play an important role. In direct data relay between two terrestrial sites via LEO satellites, LEO satellites switch the directions of multiple beams for both uplink and downlink by time-division to accommodate extensive traffic demands. In this scenario, the end-to-end latency is increased by waiting time until beam illumination, channel states for uplink/downlink, and data accumulation due to satellite buffer capacity limitations. In this paper, we propose a scheduling method for uplink and downlink multi-beam direction that achieves low-latency data relay under satellite buffer capacity limitations and demonstrate its effectiveness by simulation results.
Keyword (in Japanese) (See Japanese page) 
(in English) Satellite Communications / Satellite Constellations / Multi-beam Scheduling / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 162, SAT2025-50, pp. 44-49, Aug. 2025.
Paper # SAT2025-50 
Date of Issue 2025-08-21 (SAT, 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 SAT2025-50 RCS2025-119

Conference Information
Committee RCS SAT  
Conference Date 2025-08-28 - 2025-08-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Toki Messe 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Satellite Communications, Broadcasting, Forward Error Correction, Wireless Communications, etc. 
Paper Information
Registration To SAT 
Conference Code 2025-08-RCS-SAT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Multi-Beam Scheduling for Uplink and Downlink to Reduce Latency in Data Relay Satellite 
Sub Title (in English)  
Keyword(1) Satellite Communications  
Keyword(2) Satellite Constellations  
Keyword(3) Multi-beam Scheduling  
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1st Author's Name Kohei Yoshida  
1st Author's Affiliation NEC Corporation (NEC)
2nd Author's Name Yohei Hasegawa  
2nd Author's Affiliation NEC Corporation (NEC)
3rd Author's Name Kazushi Sugyo  
3rd Author's Affiliation NEC Corporation (NEC)
4th Author's Name Kazushi Muraoka  
4th Author's Affiliation NEC Corporation (NEC)
5th Author's Name Masayuki Ariyoshi  
5th Author's Affiliation NEC Corporation (NEC)
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Speaker Author-1 
Date Time 2025-08-29 15:35:00 
Presentation Time 25 minutes 
Registration for SAT 
Paper # SAT2025-50, RCS2025-119 
Volume (vol) vol.125 
Number (no) no.162(SAT), no.163(RCS) 
Page pp.44-49(SAT), pp.101-106(RCS) 
#Pages 6 
Date of Issue 2025-08-21 (SAT, RCS) 

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