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Paper Abstract and Keywords
Presentation 2026-09-04 11:10
Performance Evaluation of Recursive Query Routing in Topology-Aware IPFS
Pengliang Liu, Hidenori Nakazato (Waseda Univ.) CS2026-35
Abstract (in Japanese) (See Japanese page) 
(in English) In the InterPlanetary File System (IPFS), the random assignment of Kademlia node IDs decouples the logical overlay from the physical underlay, resulting in high query latency. Although recent topology-aware frameworks utilize space-filling curves and proximity-aware K-Bucket update policies to preserve physical locality in routing tables, the default Kademlia routing algorithm fails to fully exploit this localized structure. Building upon the recursive routing concept and its synergy with proximity-aware K-Buckets recommended in our previous work, this paper formally designs the algorithmic specifics of the recursive query mechanism for topology-aware IPFS networks. Unlike the original Kademlia protocol, which forces the originating node to iteratively establish long-distance connections, our recursive scheme delegates lookups to intermediate peers, forming a continuous sequence of low-latency physical hops. To prevent exponential message fan-out, we propose a strict concurrency limit (α=1) as part of the detailed algorithmic design. We validate this architecture through high-fidelity ns-3 network simulations, profiling end-to-end Round Trip Time (RTT) latency under concurrent Key-Value (KV) workloads. Experimental results demonstrate that our topology-aware recursive architecture significantly reduces the routing latency for both Node Lookup and KV operations compared to a baseline recursive Kademlia implementation utilizing random ID assignment.
Keyword (in Japanese) (See Japanese page) 
(in English) IPFS / Kademlia / Recursive Routing / Space-Filling Curves / / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 166, CS2026-35, pp. 32-37, Sept. 2026.
Paper # CS2026-35 
Date of Issue 2026-08-27 (CS) 
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 CS2026-35

Conference Information
Committee NS IN CS NV  
Conference Date 2026-09-03 - 2026-09-04 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku University + Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Session management (SIP/IMS), Interoperability/Standardization, NGN/NwGN/Future networks, Cloud/Data center networks, SDN (OpenFlow, etc.)/NFV, IPv6, Machine learning, etc. 
Paper Information
Registration To CS 
Conference Code 2026-09-NS-IN-CS-NV 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Performance Evaluation of Recursive Query Routing in Topology-Aware IPFS 
Sub Title (in English)  
Keyword(1) IPFS  
Keyword(2) Kademlia  
Keyword(3) Recursive Routing  
Keyword(4) Space-Filling Curves  
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1st Author's Name Pengliang Liu  
1st Author's Affiliation Waseda University (Waseda Univ.)
2nd Author's Name Hidenori Nakazato  
2nd Author's Affiliation Waseda University (Waseda Univ.)
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Speaker Author-1 
Date Time 2026-09-04 11:10:00 
Presentation Time 25 minutes 
Registration for CS 
Paper # CS2026-35 
Volume (vol) vol.126 
Number (no) no.166 
Page pp.32-37 
#Pages 6 
Date of Issue 2026-08-27 (CS) 

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