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Paper Abstract and Keywords
Presentation 2008-04-23 14:30
Finding the Optimal Configuration of a Cascading Single-Voter TMR System
Masashi Hamamatsu, Tatsuhiro Tsuchiya, Tohru Kikuno (Osaka Univ.) CPSY2008-6 DC2008-6
Abstract (in Japanese) (See Japanese page) 
(in English) Triple modular redundancy (TMR) is a major method that is used for implementing fault tolerant systems. In TMR, a module unit is triplicated, and the outputs of these three units are compared by a voter. A system connecting multiple TMR in series is called a cascading TMR system. Traditionally cascading single-voter TMR systems use voters of fan-out three.Recently, however, a new cascading single-voter TMR system configuration which uses voters of fan-out one was proposed. This study proposes a method of calculating the reliability of cascading single-voter TMR systems and an algorithm for finding the optimal configuration of a cascading single-voter TMR system. The method of calculating reliability uses a case-splitting based on the state of the values of the three lines in a cascading single-voter TMR system to calculate the occurrence probability of each state at every stage. The method of finding the optimal configuration of a cascading single-voter TMR system uses the branch and bound approach to explore the solution space effectively.
Keyword (in Japanese) (See Japanese page) 
(in English) Fault Tolerant System / Triple Modular Redundancy(TMR) / Cascading TMR / / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 15, DC2008-6, pp. 31-36, April 2008.
Paper # DC2008-6 
Date of Issue 2008-04-16 (CPSY, DC) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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)
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Conference Information
Committee DC CPSY  
Conference Date 2008-04-23 - 2008-04-23 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Dependable Computing Systems, etc. 
Paper Information
Registration To DC 
Conference Code 2008-04-DC-CPSY 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Finding the Optimal Configuration of a Cascading Single-Voter TMR System 
Sub Title (in English)  
Keyword(1) Fault Tolerant System  
Keyword(2) Triple Modular Redundancy(TMR)  
Keyword(3) Cascading TMR  
1st Author's Name Masashi Hamamatsu  
1st Author's Affiliation Osaka University (Osaka Univ.)
2nd Author's Name Tatsuhiro Tsuchiya  
2nd Author's Affiliation Osaka University (Osaka Univ.)
3rd Author's Name Tohru Kikuno  
3rd Author's Affiliation Osaka University (Osaka Univ.)
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Speaker Author-1 
Date Time 2008-04-23 14:30:00 
Presentation Time 30 minutes 
Registration for DC 
Paper # CPSY2008-6, DC2008-6 
Volume (vol) vol.108 
Number (no) no.14(CPSY), no.15(DC) 
Page pp.31-36 
Date of Issue 2008-04-16 (CPSY, DC) 

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