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Paper Abstract and Keywords
Presentation 2026-03-04 16:50
Extending the Channel Routing Method to the Multi-Layer Routing Problem
Kotaro Ito, Kunihiro Fujiyoshi (TUAT) VLD2025-83 HWS2025-79 ICD2025-94
Abstract (in Japanese) (See Japanese page) 
(in English) The channel routing problem is a special routing problem that aims to connect terminals of each net within an obstacle-free rectangular region, for which efficient routing methods based on vertical constraint graphs have been proposed. However, even with such extensions, conventional methods cannot route all nets in practical routing problems where terminals are located inside the routing region. In this paper, we propose a routing method that combines dogleg routing and multilayer routing. The proposed method incrementally increases the number of routing layers by pairs of two layers until all nets are successfully routed, while determining for each net—based on the vertical constraint graph—whether to apply dogleg splitting or to move the net to an upper layer. This strategy enables routing to proceed while suppressing congestion. Experimental results using benchmark circuits confirm that all nets can be successfully routed using the proposed method.
Keyword (in Japanese) (See Japanese page) 
(in English) channel routing / multilayer routing / dogleg routing / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 382, VLD2025-83, pp. 42-47, March 2026.
Paper # VLD2025-83 
Date of Issue 2026-02-25 (VLD, HWS, ICD) 
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 VLD2025-83 HWS2025-79 ICD2025-94

Conference Information
Committee ICD HWS VLD  
Conference Date 2026-03-04 - 2026-03-07 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To VLD 
Conference Code 2026-03-ICD-HWS-VLD 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Extending the Channel Routing Method to the Multi-Layer Routing Problem 
Sub Title (in English)  
Keyword(1) channel routing  
Keyword(2) multilayer routing  
Keyword(3) dogleg routing  
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1st Author's Name Kotaro Ito  
1st Author's Affiliation Tokyo University of Agriculture and Technology (TUAT)
2nd Author's Name Kunihiro Fujiyoshi  
2nd Author's Affiliation Tokyo University of Agriculture and Technology (TUAT)
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Speaker Author-1 
Date Time 2026-03-04 16:50:00 
Presentation Time 25 minutes 
Registration for VLD 
Paper # VLD2025-83, HWS2025-79, ICD2025-94 
Volume (vol) vol.125 
Number (no) no.382(VLD), no.383(HWS), no.384(ICD) 
Page pp.42-47 
#Pages 6 
Date of Issue 2026-02-25 (VLD, HWS, ICD) 

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