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Experimental assessment of in-operation spectrum defragmentation

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Abstract

Dynamic operation of flexgrid networks might cause optical spectrum to be divided into fragments, which makes it difficult finding contiguous spectrum of the required width for incoming connection requests, leading thus to an increased blocking probability. To alleviate to some extent that spectrum fragmentation, the central frequency of already established connections can be shifted to create wider contiguous spectrum fragments to be allocated to incoming connections; this procedure is called spectrum defragmentation. In this paper, we propose using the so called applications based network operations (ABNO) architecture, currently under standardization in the IETF, to deal with the defragmentation use case while the network is in operation. A workflow involving several elements in the ABNO architecture is proposed and experimentally assessed in a distributed test bed connecting facilities in three major European cities.

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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 \(\hbox {n}^{\circ }\) 317999 IDEALIST project.

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Authors and Affiliations

  1. Optical Communications Group (GCO), Universitat Politècnica de Catalunya (UPC), Barcelona, Spain

    Lluis Gifre, Alberto Castro & Luis Velasco

  2. Consorzio Nazionale Interuniversitario per le Telecomunicazioni (CNIT), Pisa, Italy

    Francesco Paolucci, Filippo Cugini & Piero Castoldi

  3. Telefónica Investigación y Desarrollo (TID), Madrid, Spain

    Alejandro Aguado & Víctor López

  4. Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), Barcelona, Spain

    Ramon Casellas

Authors
  1. Lluis Gifre
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  2. Francesco Paolucci
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  3. Alejandro Aguado
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  4. Ramon Casellas
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  5. Alberto Castro
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  6. Filippo Cugini
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  7. Piero Castoldi
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  8. Luis Velasco
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  9. Víctor López
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Correspondence to Lluis Gifre.

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Gifre, L., Paolucci, F., Aguado, A. et al. Experimental assessment of in-operation spectrum defragmentation. Photon Netw Commun 27, 128–140 (2014). https://doi.org/10.1007/s11107-014-0433-7

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  • DOI: https://doi.org/10.1007/s11107-014-0433-7

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