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Paper Abstract and Keywords
Presentation 2009-03-03 11:50
A Design Method of Robust Networks against Performance Deterioration in Failures
Nozomu Katayama, Takeshi Fujimura, Hiroyoshi Miwa (Kwansei Gakuin Univ.), Noriaki Kamiyama, Haruhisa Hasegawa, Hideaki Yoshino (NTT)
Abstract (in Japanese) (See Japanese page) 
(in English) A telecommunication network should be reliable, since it is important as social infrastructure. But it is known that, in many real networks, there exists the risk that the quality of service drastically deteriorates when the length of paths increases by a link failure. To get rid of this risk, it is necessary to design a network that the maximum increasing rate of the length of all paths in a link failure is small. Such a network must be constructed by adding some links to a network, because it is impossible to reconstruct a network which is in operation.

In this paper, we formalize this network design problem as the optimization problem that determines the edges added to a graph so that the maximum increasing rate of the lengths of all paths in an edge deletion is not more than a threshold. First, we prove that this problem is NP-complete. Next, we propose an approximation algorithm for this problem and evaluate its performance by applying the algorithm to some real ISP networks. As a result, the proposed algorithm shows the good performance.
Keyword (in Japanese) (See Japanese page) 
(in English) quality of service / backbone network / optimization problem / NP-complete / approximation algorithm / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 457, NS2008-164, pp. 117-122, March 2009.
Paper # NS2008-164 
Date of Issue 2009-02-24 (NS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee IN NS  
Conference Date 2009-03-03 - 2009-03-04 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa-Zanpamisaki Royal Hotel 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General issues 
Paper Information
Registration To NS 
Conference Code 2009-03-IN-NS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Design Method of Robust Networks against Performance Deterioration in Failures 
Sub Title (in English)  
Keyword(1) quality of service  
Keyword(2) backbone network  
Keyword(3) optimization problem  
Keyword(4) NP-complete  
Keyword(5) approximation algorithm  
1st Author's Name Nozomu Katayama  
1st Author's Affiliation Kwansei Gakuin University (Kwansei Gakuin Univ.)
2nd Author's Name Takeshi Fujimura  
2nd Author's Affiliation Kwansei Gakuin University (Kwansei Gakuin Univ.)
3rd Author's Name Hiroyoshi Miwa  
3rd Author's Affiliation Kwansei Gakuin University (Kwansei Gakuin Univ.)
4th Author's Name Noriaki Kamiyama  
4th Author's Affiliation NTT (NTT)
5th Author's Name Haruhisa Hasegawa  
5th Author's Affiliation NTT (NTT)
6th Author's Name Hideaki Yoshino  
6th Author's Affiliation NTT (NTT)
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Date Time 2009-03-03 11:50:00 
Presentation Time 20 
Registration for NS 
Paper # IEICE-NS2008-164 
Volume (vol) IEICE-108 
Number (no) no.457 
Page pp.117-122 
#Pages IEICE-6 
Date of Issue IEICE-NS-2009-02-24 

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