Experimental assessment of in-operation spectrum defragmentation

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...

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Bibliographic Details
Published in:Photonic network communications 2014-06, Vol.27 (3), p.128-140
Main Authors: Gifre, Lluis, Paolucci, Francesco, Aguado, Alejandro, Casellas, Ramon, Castro, Alberto, Cugini, Filippo, Castoldi, Piero, Velasco, Luis, López, Víctor
Format: Article
Language:English
Subjects:
ARCHITECTURE
Characterization and Evaluation of Materials
Computer Communication Networks
Computer Science
Comunicacions òptiques
Electrical Engineering
Enginyeria de la telecomunicació
Flexgrid optical networks
Fotònica
In-operation planning
Optical communications
Photonics
Spectrum defragmentation
Telecomunicació òptica
Àrees temàtiques de la UPC
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Summary: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.
ISSN:1387-974X
1572-8188
DOI:10.1007/s11107-014-0433-7