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Paper Abstract and Keywords
Presentation 2009-06-25 13:35
A failure rate estimation considering the change in the number of equipments -- Applicable condition of mathematical model for proposed method --
Hiroyuki Funakoshi, Tatsuya Matsukawa (NTT) NS2009-33
Abstract (in Japanese) (See Japanese page) 
(in English) The authors have been insisted on the importance of reliability management for IP networks constructed of commercial equipments, and studied the management technique using the actual failure data. Failure rate, unavailability, and maintainability are the typical measures for the reliability management of telecommunication networks. These reliability measures could not be exactly estimated using the previous reliability methods because the number of equipments and users change in communication networks. The authors proposed the method for estimating the instantaneous failure rate by using the number of equipments and cumulative failures. However, there is a problem in this method that the failure rate estimated by some polynomial approximations of the cumulative failures may be uncontinuous. In this paper, the authors study on the applicable condition of mathematical model for proposed method to solve the issue mentioned above.
Keyword (in Japanese) (See Japanese page) 
(in English) reliability / failure rate / number of equipments / cumulative failures / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 102, NS2009-33, pp. 13-18, June 2009.
Paper # NS2009-33 
Date of Issue 2009-06-18 (NS) 
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 NS OCS PN  
Conference Date 2009-06-25 - 2009-06-26 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagasaki Museum of History and Culture (Nagasaki) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Photonic Network System, Optical Control, Optical Switching, WDM, Multi-layer, Next Generation Transport 
Paper Information
Registration To NS 
Conference Code 2009-06-NS-OCS-PN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A failure rate estimation considering the change in the number of equipments 
Sub Title (in English) Applicable condition of mathematical model for proposed method 
Keyword(1) reliability  
Keyword(2) failure rate  
Keyword(3) number of equipments  
Keyword(4) cumulative failures  
1st Author's Name Hiroyuki Funakoshi  
1st Author's Affiliation NTT Service Integration Laboratories (NTT)
2nd Author's Name Tatsuya Matsukawa  
2nd Author's Affiliation NTT Service Integration Laboratories (NTT)
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Date Time 2009-06-25 13:35:00 
Presentation Time 25 
Registration for NS 
Paper # IEICE-NS2009-33 
Volume (vol) IEICE-109 
Number (no) no.102 
Page pp.13-18 
#Pages IEICE-6 
Date of Issue IEICE-NS-2009-06-18 

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