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Paper Abstract and Keywords
Presentation 2009-09-10 15:40
A study on the computation of maintainability for telecommunication networks
Hiroyuki Funakoshi, Tatsuya Matsukawa (NTT) CQ2009-30
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. We have clarifed that the service outage times have the mixed log-normal distribution and that the actions for repairs is related to the number of mixtures. However, the computation of maintainability is not established. In this paper, we study on the computation of maintainability with R: a freely available language and environment for statistical computing and graphics. The actual analysis is executed with concise R scripts.
Keyword (in Japanese) (See Japanese page) 
(in English) reliability / maintainability / mixtures of log-normal distributions / / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 191, CQ2009-30, pp. 27-32, Sept. 2009.
Paper # CQ2009-30 
Date of Issue 2009-09-03 (CQ) 
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)
Download PDF CQ2009-30

Conference Information
Committee CQ  
Conference Date 2009-09-10 - 2009-09-11 
Place (in Japanese) (See Japanese page) 
Place (in English) Takayama Culture Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Quality of multi-sensory media, Audio and video quality, Quality control of networks, Architecture of Next/New generation networks, Communications in virtual environments, general fields 
Paper Information
Registration To CQ 
Conference Code 2009-09-CQ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A study on the computation of maintainability for telecommunication networks 
Sub Title (in English)  
Keyword(1) reliability  
Keyword(2) maintainability  
Keyword(3) mixtures of log-normal distributions  
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 2009-09-10 15:40:00 
Presentation Time 30 
Registration for CQ 
Paper # IEICE-CQ2009-30 
Volume (vol) IEICE-109 
Number (no) no.191 
Page pp.27-32 
#Pages IEICE-6 
Date of Issue IEICE-CQ-2009-09-03 

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