Dynamic connection establishment and network re-optimization in flexible optical networks

P. Soumplis, K. Christodoulopoulos, E. Varvarigos

Research output: Chapter in Book/Report/Conference proceedingConference PaperOtherpeer-review

4 Citations (Scopus)


We propose a dynamic connection establishment algorithm for flexible optical networks. When the spectrum is fragmented, blocking a connection establishment, the algorithm re-optimizes the network by shifting ('pushing') in the spectrum domain and/or rerouting established connections. We devised appropriate algorithms that search among different combinations of shifting and rerouting alternatives and select the one with the minimum cost. Since shifting or rerouting a connection might trigger more shifting and rerouting actions, the proposed algorithms are recursive. Since the solution space can be very large, we use a threshold on the recursion depth to reduce the complexity, and also provide a tradeoff between performance and running time.

Original languageEnglish
Title of host publication2014 International Conference on Optical Network Design and Modeling
EditorsPaolo Monti, Piero Castoldi
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages6
ISBN (Electronic)9783901882609
ISBN (Print)9781479939497
Publication statusPublished - 2014
Externally publishedYes
EventInternational Conference on Optical Network Design and Modeling 2014 - Stockholm, Sweden
Duration: 19 May 201422 May 2014
Conference number: 18th


ConferenceInternational Conference on Optical Network Design and Modeling 2014
Abbreviated titleONDM 2014
Internet address


  • dynamic Routing and Spectrum Allocation
  • Flexible/Elastic optical networks
  • spectrum defragmentation

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