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Multipath restoration and bitrate squeezing in SDN-based elastic optical networks [Invited]

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Abstract

Sliceable bandwidth-variable transponders (SBVTs) enable the adaptation of transmission parameters according to traffic requirements and network constraints. In this study, SBVTs capabilities are evaluated in the context of restoration. In particular, multipath recovery and bitrate squeezing are applied to maximize the amount of restored bitrate, also exploiting limited portions of spectrum resources along multiple routes. An integer linear programming model and heuristic strategy are proposed. A software defined network (SDN) architecture is then introduced to adequately support the SBVT configuration. The SDN architecture is applied to experimentally assess that the overall re-configuration time upon failure detection is included within two seconds, largely dominated by the proprietary control of bandwidth-variable optical cross-connects. Finally, extensive simulation results show the relevant restoration capabilities achieved by the proposed multipath recovery and bitrate squeezing scheme.

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Acknowledgments

The research leading to these results has received funding from the European Community’s Seventh Framework Programme (FP7/2007-2013) under Grant Agreement No. 238875 GÉANT (open call REACTION), and from the Spanish Science Ministry through ELASTIC (TEC2011-27310) Project.

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Authors and Affiliations

  1. TeCIP, Scuola Superiore Sant’Anna, via Moruzzi 1, Pisa, Italy

    Francesco Paolucci & Piero Castoldi

  2. Universitat Politècnica de Catalunya (UPC), Barcelona, Spain

    Alberto Castro & Luis Velasco

  3. CNIT, via Moruzzi 1, Pisa, Italy

    Filippo Cugini

Authors
  1. Francesco Paolucci
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  2. Alberto Castro
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  3. Filippo Cugini
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  4. Luis Velasco
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  5. Piero Castoldi
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Corresponding author

Correspondence to Filippo Cugini.

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Paolucci, F., Castro, A., Cugini, F. et al. Multipath restoration and bitrate squeezing in SDN-based elastic optical networks [Invited]. Photon Netw Commun 28, 45–57 (2014). https://doi.org/10.1007/s11107-014-0444-4

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  • DOI: https://doi.org/10.1007/s11107-014-0444-4

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