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Paper Abstract and Keywords
Presentation 2025-12-18 16:05
Evaluating MP-QUIC with Retransmission Control for Video Streaming and with Network Quality Prediction
Takashi Torii, Takuma Tsubaki, Seiya Komatsu, Nobuhiro Azuma, Takuya Tojo (NTT) NS2025-171
Abstract (in Japanese) (See Japanese page) 
(in English) Remote monitoring of autonomous vehicles requires high-quality, low-latency video streaming,
but LTE/5G networks are susceptible to handovers and radio blockage, making it difficult to
maintain stable video quality over a single path. Therefore, multipath transport technologies such
as MP-QUIC have attracted attention.
However, conventional MP-QUIC packet schedulers rely only on measured delay, so they cannot avoid
transient delay increases and tend to concentrate traffic on paths with small propagation delay.
Moreover, conventional retransmission mechanisms ignore the playback buffer duration of video streams,
which wastes bandwidth due to blind retransmissions.

This paper proposes two packet schedulers that exploit throughput prediction
(the ratio scheme and the threshold scheme),
and a retransmission control scheme for video streaming that considers the playback buffer time.
Field trials with real vehicles on public roads show that, compared with a conventional scheme,
the ratio scheme reduces the mean and 90th percentile smoothed round-trip time (SRTT) by about 20% and
improves the packet loss rate by 0.21 percentage points, while the threshold
scheme further improves these SRTT metrics by about 10%, improves the packet loss rate by
0.18 percentage points, and reduces both the number and ratio of video outages by about 30%.
The proposed video-oriented retransmission control also reduces by about 20% the ratio of
retransmitted packets that exceed the playback buffer deadline, demonstrating improvements in
latency, packet loss, and video outages for low-latency video streaming in remote monitoring
of autonomous vehicles.
Keyword (in Japanese) (See Japanese page) 
(in English) Autonomous vehicle / Multipath transport / MP-QUIC / Packet scheduler / Retransmission control / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 301, NS2025-171, pp. 108-113, Dec. 2025.
Paper # NS2025-171 
Date of Issue 2025-12-11 (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 NS2025-171

Conference Information
Committee NS RCS  
Conference Date 2025-12-18 - 2025-12-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Fukui International Activities Plaza + Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Multi-hop/Relay/Cooperation, Disaster-resistant wireless network, Sensor/Mesh network, Ad-hoc network, D2D/M2M, Wireless network coding, Handover/AP switching/Connected cell control/Load balancing among base stations/Mobile network dynamic reconfiguration, QoS/QoE assurance, Wireless VoIP, IoT, Edge computing, etc. 
Paper Information
Registration To NS 
Conference Code 2025-12-NS-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluating MP-QUIC with Retransmission Control for Video Streaming and with Network Quality Prediction 
Sub Title (in English)  
Keyword(1) Autonomous vehicle  
Keyword(2) Multipath transport  
Keyword(3) MP-QUIC  
Keyword(4) Packet scheduler  
Keyword(5) Retransmission control  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Takashi Torii  
1st Author's Affiliation NTT, Inc. (NTT)
2nd Author's Name Takuma Tsubaki  
2nd Author's Affiliation NTT, Inc. (NTT)
3rd Author's Name Seiya Komatsu  
3rd Author's Affiliation NTT, Inc. (NTT)
4th Author's Name Nobuhiro Azuma  
4th Author's Affiliation NTT, Inc. (NTT)
5th Author's Name Takuya Tojo  
5th Author's Affiliation NTT, Inc. (NTT)
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Speaker Author-1 
Date Time 2025-12-18 16:05:00 
Presentation Time 20 minutes 
Registration for NS 
Paper # NS2025-171 
Volume (vol) vol.125 
Number (no) no.301 
Page pp.108-113 
#Pages 6 
Date of Issue 2025-12-11 (NS) 

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