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A post-optimization method for the routing and wavelength assignment problem applied to scheduled lightpath demands

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  • Belgacem, Lucile
  • Charon, Irène
  • Hudry, Olivier

Abstract

We consider here a NP-hard problem related to the Routing and Wavelength Assignment (RWA) problem in optical networks, dealing with Scheduled Lightpath Demands (SLDs). An SLD is a connection demand between two nodes of the network, during a certain time. Given a set of SLDs, we want to assign a lightpath, i.e. a routing path and a wavelength, to each SLD, so that the total number of required wavelengths is minimized. The constraints are the following: a same wavelength must be assigned all along the edges of the routing path of any SLD; at any time, a given wavelength on a given edge of the network cannot be used to satisfy more than one SLD. To solve this problem, we design a post-optimization method improving the solutions provided by a heuristic. The experimental results show that this post-optimization method is quite efficient to reduce the number of necessary wavelengths.

Suggested Citation

  • Belgacem, Lucile & Charon, Irène & Hudry, Olivier, 2014. "A post-optimization method for the routing and wavelength assignment problem applied to scheduled lightpath demands," European Journal of Operational Research, Elsevier, vol. 232(2), pages 298-306.
    • Handle: RePEc:eee:ejores:v:232:y:2014:i:2:p:298-306
    DOI: 10.1016/j.ejor.2013.06.050
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    References listed on IDEAS

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    1. Skorin-Kapov, Nina, 2007. "Routing and wavelength assignment in optical networks using bin packing based algorithms," European Journal of Operational Research, Elsevier, vol. 177(2), pages 1167-1179, March.
    2. Noronha, Thiago F. & Ribeiro, Celso C., 2006. "Routing and wavelength assignment by partition colouring," European Journal of Operational Research, Elsevier, vol. 171(3), pages 797-810, June.
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    Cited by:

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    2. Fabrizio Altarelli & Alfredo Braunstein & Luca Dall’Asta & Caterina De Bacco & Silvio Franz, 2015. "The Edge-Disjoint Path Problem on Random Graphs by Message-Passing," PLOS ONE, Public Library of Science, vol. 10(12), pages 1-18, December.
    3. Agarwal, Y.K. & Venkateshan, Prahalad, 2016. "Near optimal design of wavelength routed optical networks," European Journal of Operational Research, Elsevier, vol. 250(3), pages 990-1000.

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