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Paper Abstract and Keywords
Presentation 2026-06-18 15:40
A MPQUIC Packet Scheduler for Mission-Critical Services Based on Current Delay and Future Delay Degradation Risk
Takuma Tsubaki, Soto Anno, Takashi Torii, Seiya Komatsu, Takuya Tojo (NTT) NS2026-39
Abstract (in Japanese) (See Japanese page) 
(in English) Mission-critical services require stable mobile communication because communication delays and transient disconnections directly affect service quality. In this paper, we focus on remote monitoring for autonomous driving as a representative mission-critical service and propose a lightweight packet scheduler for Multipath QUIC (MPQUIC). A conventional Time-in-Flight-based scheduler is easy to implement because it relies on measured delay information and the sojourn time of unacknowledged packets; however, it reacts after delay degradation appears in the observed metrics and may not sufficiently suppress delay degradation at an early stage. The proposed scheduler jointly evaluates the approximate queueing delay of each path and future delay degradation risk. It then selects the path with the minimum score for packet transmission. We evaluated the proposed scheduler through on-road field trials in Musashino City, Tokyo. In the experiment, uplink UDP traffic was generated by iperf2 at 10.0 Mbps over MPQUIC using three cellular links. One-way delay (OWD) and packet loss rate (PLR) were used as evaluation metrics. The results show that the proposed scheduler improves mean delay, 95th-percentile delay, and PLR compared with the TiF-based scheduler.
Keyword (in Japanese) (See Japanese page) 
(in English) Multipath QUIC / Packet Scheduler / Mission-critical Services / Real Field Experiment / / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 75, NS2026-39, pp. 19-24, June 2026.
Paper # NS2026-39 
Date of Issue 2026-06-11 (NS) 
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 NS2026-39

Conference Information
Committee OCS NS PN  
Conference Date 2026-06-18 - 2026-06-19 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To NS 
Conference Code 2026-06-OCS-NS-PN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A MPQUIC Packet Scheduler for Mission-Critical Services Based on Current Delay and Future Delay Degradation Risk 
Sub Title (in English)  
Keyword(1) Multipath QUIC  
Keyword(2) Packet Scheduler  
Keyword(3) Mission-critical Services  
Keyword(4) Real Field Experiment  
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1st Author's Name Takuma Tsubaki  
1st Author's Affiliation NTT (NTT)
2nd Author's Name Soto Anno  
2nd Author's Affiliation NTT (NTT)
3rd Author's Name Takashi Torii  
3rd Author's Affiliation NTT (NTT)
4th Author's Name Seiya Komatsu  
4th Author's Affiliation NTT (NTT)
5th Author's Name Takuya Tojo  
5th Author's Affiliation NTT (NTT)
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Speaker Author-1 
Date Time 2026-06-18 15:40:00 
Presentation Time 25 minutes 
Registration for NS 
Paper # NS2026-39 
Volume (vol) vol.126 
Number (no) no.75 
Page pp.19-24 
#Pages 6 
Date of Issue 2026-06-11 (NS) 

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