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Paper Abstract and Keywords
Presentation 2005-07-14 11:10
Masahiro Hayashi, Takeo Abe (NTT)
Abstract (in Japanese) (See Japanese page) 
(in English) Factoring algorithm with reductions was recently proposed method for exactly computing failure frequencies of telecommunications networks. However, it has a limitation of computation time because the computation problem of failure frequency is known as NP hard. Another result show that the delta-star conversion is a high-speed approximation method but its application is strictly limited, because it needs a special topology expressed by triangle. To overcome these limitations, it is a reasonable idea of combining the factoring algorithm with reductions and delta-star conversion in a certain manner. Now, this paper first realizes this combined method to compute network failure frequency. We have implemented it on a workstation, and numerical examples show that this combined method realizes high-speed computation with high-accuracies.
Keyword (in Japanese) (See Japanese page) 
(in English) Reliability / Availability / Failure Frequency / Network / Delta-Star conversion / / /  
Reference Info. IEICE Tech. Rep., vol. 105, no. 179, CQ2005-18, pp. 13-18, July 2005.
Paper # CQ2005-18 
Date of Issue 2005-07-07 (CQ) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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Conference Information
Committee CQ  
Conference Date 2005-07-14 - 2005-07-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Wakkanai Hokusei Gakuen College 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Contents/Security/Reliability/Mobile for Broadband and Broadcast, etc. 
Paper Information
Registration To CQ 
Conference Code 2005-07-CQ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Sub Title (in English)  
Keyword(1) Reliability  
Keyword(2) Availability  
Keyword(3) Failure Frequency  
Keyword(4) Network  
Keyword(5) Delta-Star conversion  
1st Author's Name Masahiro Hayashi  
1st Author's Affiliation Nippon Telegraph and Telephon Corporation (NTT)
2nd Author's Name Takeo Abe  
2nd Author's Affiliation Nippon Telegraph and Telephon Corporation (NTT)
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Date Time 2005-07-14 11:10:00 
Presentation Time 25 
Registration for CQ 
Paper # IEICE-CQ2005-18 
Volume (vol) IEICE-105 
Number (no) no.179 
Page pp.13-18 
#Pages IEICE-6 
Date of Issue IEICE-CQ-2005-07-07 

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