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Paper Abstract and Keywords
Presentation 2026-03-04 14:10
Weighted Gathering problem and information exchange problem for mobile robots on vertex-weighted graphs
Ryosuke Ikeda, Yukiko Yamauchi (Kyushu U.) COMP2025-25
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we propose the weighted gathering problem for a group of mobile robots moving on a vertex-weighted graph. The weight of each vertex represents the maximum number of robots that can simultaneously reside at that vertex. The weighted gathering problem is defined as the problem of moving all robots to a connected subgraph whose total vertex weight is at least the number of robots. Furthermore, after solving the weighted gathering problem, we introduce the information exchange problem. The problem requires all robots to share information by each pair of robots exchanging information when they are located at the same vertex. We say that two robots meet if they are located at the same vertex at the same time. The information exchange problem requires that every robot meets all the other robots and exchanges information with them. In this paper, we propose algorithms to solve both the weighted gathering problem and the information exchange problem on trees and general graphs.
Keyword (in Japanese) (See Japanese page) 
(in English) Distributed algorithm / Mobile robots / Gathering problem / Information sharing problem / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 390, COMP2025-25, pp. 22-29, March 2026.
Paper # COMP2025-25 
Date of Issue 2026-02-25 (COMP) 
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 COMP2025-25

Conference Information
Committee COMP  
Conference Date 2026-03-04 - 2026-03-04 
Place (in Japanese) (See Japanese page) 
Place (in English) Chuo University Korakuen Campus Building 6 4F Room 6402 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Theoretical Computer Science, General 
Paper Information
Registration To COMP 
Conference Code 2026-03-COMP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Weighted Gathering problem and information exchange problem for mobile robots on vertex-weighted graphs 
Sub Title (in English)  
Keyword(1) Distributed algorithm  
Keyword(2) Mobile robots  
Keyword(3) Gathering problem  
Keyword(4) Information sharing problem  
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1st Author's Name Ryosuke Ikeda  
1st Author's Affiliation Kyushu University (Kyushu U.)
2nd Author's Name Yukiko Yamauchi  
2nd Author's Affiliation Kyushu University (Kyushu U.)
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Speaker Author-1 
Date Time 2026-03-04 14:10:00 
Presentation Time 30 minutes 
Registration for COMP 
Paper # COMP2025-25 
Volume (vol) vol.125 
Number (no) no.390 
Page pp.22-29 
#Pages 8 
Date of Issue 2026-02-25 (COMP) 

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