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Paper Abstract and Keywords
Presentation 2025-11-11 13:25
Reliability Modeling of Inter Switch Links using Co-Packaged Optics (CPO) and Its Evaluations
Tsuyoshi Ito, Yusuke Muranaka, Yuki Arikawa, Kazunori Seno (NTT) PN2025-21
Abstract (in Japanese) (See Japanese page) 
(in English) With the increasing speed and density of inter-server networks in data centers, ensuring the reliability of inter-switch links is crucial, as link failures directly affect system availability, and increasingly complex configurations demand more precise reliability assessments. Recently, Co-Packaged Optics (CPO) technology—where ASIC and optical components areintegrated into a single package—has gained attention as a means to reduce the power consumption of network switches by shortening electrical interconnects between the ASIC and the optical interface and minimizing the need for signal conditioning
circuits. However, the unique internal structure of CPO also necessitates new approaches to reliability evaluation. This paper proposes a reliability model derived from the internal structure of CPO and adapted for evaluating inter-switch links and introduces a simplified method to facilitate evaluation. Furthermore, the effectiveness of the proposed model is assessed by comparing it with a conventional model that does not reflect internal structure, and the results of this comparison are reported.
Keyword (in Japanese) (See Japanese page) 
(in English) Co-Packaged Optics（CPO） / Network Switch / Data Cente / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 236, PN2025-21, pp. 12-17, Nov. 2025.
Paper # PN2025-21 
Date of Issue 2025-11-03 (PN) 
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 PN2025-21

Conference Information
Committee PN  
Conference Date 2025-11-10 - 2025-11-11 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To PN 
Conference Code 2025-11-PN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Reliability Modeling of Inter Switch Links using Co-Packaged Optics (CPO) and Its Evaluations 
Sub Title (in English)  
Keyword(1) Co-Packaged Optics（CPO）  
Keyword(2) Network Switch  
Keyword(3) Data Cente  
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1st Author's Name Tsuyoshi Ito  
1st Author's Affiliation NTT, Inc (NTT)
2nd Author's Name Yusuke Muranaka  
2nd Author's Affiliation NTT, Inc (NTT)
3rd Author's Name Yuki Arikawa  
3rd Author's Affiliation NTT, Inc (NTT)
4th Author's Name Kazunori Seno  
4th Author's Affiliation NTT, Inc (NTT)
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Speaker Author-1 
Date Time 2025-11-11 13:25:00 
Presentation Time 25 minutes 
Registration for PN 
Paper # PN2025-21 
Volume (vol) vol.125 
Number (no) no.236 
Page pp.12-17 
#Pages 6 
Date of Issue 2025-11-03 (PN) 

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