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Paper Abstract and Keywords
Presentation 2026-03-05 13:40
Examination of Spatiotemporal Measurement Granularity for AS Path Delay Distribution Identification
Kohshi Yamaguchi (ICU), Kensuke Fukuda (NII), Keisuke Ishibashi (ICU) SITE2025-103 IA2025-102
Abstract (in Japanese) (See Japanese page) 
(in English) Network tomography is useful for characterizing delay properties of AS segments in the Internet, where the number of segments is large, because it can reduce the number of measurement destinations required. In network tomography, the estimation unit is typically a link; however, when AS segments are used as the estimation unit, several challenges arise. Specifically, while
the value of each AS segment that constitutes diverse end-to-end paths must be uniquely determined, it is difficult to represent the delay of an AS segment as a single value due to diverse routing within an AS, making the measurement granularity too coarse. On the other hand, by refining the measurement granularity and dividing segments in both space and time, one can obtain more accurate delay distributions for segments, but the amount of data decreases, leading to lower estimation accuracy. Therefore, this study aims to identify an appropriate segment measurement granularity under the trade-off between data volume and identifiability of segment delay distributions, and discusses the estimation accuracy of segment delays when different granularities are used.
Keyword (in Japanese) (See Japanese page) 
(in English) The Internet / AS / Network Tomography / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 379, IA2025-102, pp. 178-183, March 2026.
Paper # IA2025-102 
Date of Issue 2026-02-24 (SITE, IA) 
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 SITE2025-103 IA2025-102

Conference Information
Committee IA SITE IPSJ-IOT  
Conference Date 2026-03-03 - 2026-03-05 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa Industry Support Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Internet and Information Ethics Education, etc. 
Paper Information
Registration To IA 
Conference Code 2026-03-IA-SITE-IOT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Examination of Spatiotemporal Measurement Granularity for AS Path Delay Distribution Identification 
Sub Title (in English)  
Keyword(1) The Internet  
Keyword(2) AS  
Keyword(3) Network Tomography  
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1st Author's Name Kohshi Yamaguchi  
1st Author's Affiliation International Christian University (ICU)
2nd Author's Name Kensuke Fukuda  
2nd Author's Affiliation National Institute of Informatics (NII)
3rd Author's Name Keisuke Ishibashi  
3rd Author's Affiliation International Christian University (ICU)
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Speaker Author-1 
Date Time 2026-03-05 13:40:00 
Presentation Time 25 minutes 
Registration for IA 
Paper # SITE2025-103, IA2025-102 
Volume (vol) vol.125 
Number (no) no.378(SITE), no.379(IA) 
Page pp.178-183 
#Pages 6 
Date of Issue 2026-02-24 (SITE, IA) 

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