NDLI: Survivable IP/MPLS-Over-WSON Multilayer Network Optimization

Content Provider	IEEE Xplore Digital Library
Author	Ruiz, M. Pedrola, O. Velasco, L. Careglio, D. Fernández-Palacios, J. Junyent, G.
Copyright Year	2009
Abstract	Network operators are facing the problem of dimensioning their networks for the expected huge IP traffic volumes while keeping constant or even reducing the connectivity prices. Therefore, new architectural solutions able to cope with the expected traffic increase in a more cost-effective way are needed. In this work, we study the survivable IP/multi-protocol label switching (MPLS) over wavelength switched optical network (WSON) multilayer network problem as a capital expenditure (CAPEX) minimization problem. Two network approaches providing survivability against optical links, IP/MPLS nodes, and opto-electronic port failures are compared: the classical overlay approach where two redundant IP/MPLS networks are deployed, and the new joint multilayer approach which provides the requested survivability through an orchestrated interlayer recovery scheme which minimizes the over-dimensioning of IP/MPLS nodes. Mathematical programming models are developed for both approaches. Solving these models, however, becomes impractical for realistic networks. In view of this, evolutionary heuristics based on the biased random-key genetic algorithm framework are also proposed. Exhaustive experiments on several reference network scenarios illustrate the effectiveness of the proposed approach in minimizing network CAPEX.
Starting Page	629
Ending Page	640
Page Count	12
File Size	910031
File Format	PDF
ISSN	19430620
Volume Number	3
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	OSA
Subject Keyword	Multiprotocol label switching IP networks Optical fiber communication Joints Nonhomogeneous media Topology Indexes Survivable multilayer networks Integer linear programming Multilayer planning
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications

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