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Paper Abstract and Keywords
Presentation 2026-01-22 17:50
Reduction of Latency via Decentralized Coordinate-based Peer Selection in IoT Blockchain
Koki Koshikawa, Yue Su, Kien Nguyen, Hiroo Sekiya (Chiba Univ.) SeMI2025-52
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a decentralized peer-selection system to shorten latency in Ethereum-based IoT blockchains. The proposed system employs a virtual coordinate system (VCS) constructed using the Vivaldi algorithm to reflect round-trip time (RTT) among all discovered nodes, and clusters nodes in the VCS space. Each node preferentially selects peers within the same cluster to establish low-latency connections, while also selecting peers from different clusters to preserve network-wide connectivity. This design reduces unnecessary round-trip communications while maintaining data propagation across the peer-to-peer (P2P) network.Unlike conventional score-based schemes that evaluate only currently connected peers, the proposed system evaluates the entire set of discovered nodes, thereby eliminating search-range limitations. The system is implemented on libp2p and Prysm. Experimental evaluation in a 60-node high-latency environment demonstrates a 13.8 % reduction in the time from block transmission to complete reception by all nodes compared with the existing method, Perigee.
Keyword (in Japanese) (See Japanese page) 
(in English) IoT / Blockchain / Ethereum / 遅延 / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 325, SeMI2025-52, pp. 37-42, Jan. 2026.
Paper # SeMI2025-52 
Date of Issue 2026-01-15 (SeMI) 
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 SeMI2025-52

Conference Information
Committee SeMI  
Conference Date 2026-01-22 - 2026-01-23 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SeMI 
Conference Code 2026-01-SeMI 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Reduction of Latency via Decentralized Coordinate-based Peer Selection in IoT Blockchain 
Sub Title (in English)  
Keyword(1) IoT  
Keyword(2) Blockchain  
Keyword(3) Ethereum  
Keyword(4) 遅延  
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1st Author's Name Koki Koshikawa  
1st Author's Affiliation Graduate School of Science and Engineering, Chiba University (Chiba Univ.)
2nd Author's Name Yue Su  
2nd Author's Affiliation Graduate School of Science and Engineering, Chiba University (Chiba Univ.)
3rd Author's Name Kien Nguyen  
3rd Author's Affiliation Graduate School of Science and Engineering, Chiba University (Chiba Univ.)
4th Author's Name Hiroo Sekiya  
4th Author's Affiliation Graduate School of Science and Engineering, Chiba University (Chiba Univ.)
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Speaker Author-1 
Date Time 2026-01-22 17:50:00 
Presentation Time 20 minutes 
Registration for SeMI 
Paper # SeMI2025-52 
Volume (vol) vol.125 
Number (no) no.325 
Page pp.37-42 
#Pages 6 
Date of Issue 2026-01-15 (SeMI) 

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