A Polynomial-Time Algorithm for Computing Disjoint Lightpath Pairs in Minimum Isolated-Failure-Immune WDM Optical Networks

A fundamental problem in survivable routing in wavelength division multiplexing (WDM) optical networks is the computation of a pair of link-disjoint (or node-disjoint) lightpaths connecting a source with a destination, subject to the wavelength continuity constraint. However, this problem is NP-hard...

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Veröffentlicht in:IEEE/ACM transactions on networking Jg. 22; H. 2; S. 470 - 483
Hauptverfasser: Xue, Guoliang, Gottapu, Ravi, Fang, Xi, Yang, Dejun, Thulasiraman, Krishnaiyan
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 01.04.2014
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Algorithms
Computation
Computer networks
Disjoint lightpath pairs
Fiber optic networks
Heuristic algorithms
Integer linear programming
Linear programming
Mathematical models
Mesh networks
minimum isolated failure immune networks
Network topology
Networks
Optical communication
Optical fiber networks
partial 2-trees
Protection
Routing
Scalability
Topology
Wave division multiplexing
Wavelength division multiplexing
wavelength division multiplexing (WDM) optical network
Wavelengths
WDM networks
ISSN:1063-6692, 1558-2566
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Zusammenfassung:A fundamental problem in survivable routing in wavelength division multiplexing (WDM) optical networks is the computation of a pair of link-disjoint (or node-disjoint) lightpaths connecting a source with a destination, subject to the wavelength continuity constraint. However, this problem is NP-hard when the underlying network topology is a general mesh network. As a result, heuristic algorithms and integer linear programming (ILP) formulations for solving this problem have been proposed. In this paper, we advocate the use of 2-edge connected (or 2-node connected) subgraphs of minimum isolated failure immune networks as the underlying topology for WDM optical networks. We present a polynomial-time algorithm for computing a pair of link-disjoint lightpaths with shortest total length in such networks. The running time of our algorithm is O(nW^{2}) , where n is the number of nodes, and W is the number of wavelengths per link. Numerical results are presented to demonstrate the effectiveness and scalability of our algorithm. Extension of our algorithm to the node-disjoint case is straightforward.
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ISSN:1063-6692
1558-2566
DOI:10.1109/TNET.2013.2257180