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Photonic Network Communications

, Volume 31, Issue 2, pp 259–271 | Cite as

Experimental assessment of a cognitive mechanism to reduce the impact of outdated TEDs in optical networks

  • Ramón J. DuránEmail author
  • Natalia Fernández
  • Domenico Siracusa
  • Antonio Francescon
  • Ignacio de Miguel
  • Ignacio Rodríguez
  • Juan Carlos Aguado
  • Elio Salvadori
  • Rubén M. Lorenzo
Article

Abstract

We have recently proposed and demonstrated, by means of simulation, the benefits of a simple yet effective cognitive technique to enhance stateless Path Computation Element algorithms with the aim of reducing the connection blocking probability when relying on a potentially non-up-to-date traffic engineering database. In this paper, we employ that technique, called elapsed time matrix (ETM), in the framework of the CHRON (Cognitive Heterogeneous Reconfigurable Optical Network) architecture and, more importantly, validate and analyze its performance in an emulation environment (rather than in a simulation environment) supporting impairment-aware lightpath establishment. Not only dynamic lightpath establishment on demand has been studied, but also restoration processes when facing optical link failures. Emulation results demonstrate that ETM reduces the blocking probability when establishing lightpaths on demand, and increases the percentage of successful restorations in case of optical link failure. Moreover, the use of that technique has little impact on lightpath setup time and lightpath restoration time, respectively.

Keywords

Cognition Dynamic lightpath establishment Emulator Outdated database traffic engineering database 

Notes

Acknowledgments

This work has been funded by the European Community’s Seventh Framework Programme [FP7/2007-2013] CHRON project (Cognitive Heterogeneous Reconfigurable Optical Network) under grant agreement no 258644, http://www.ict-chron.eu, and Spanish Ministry of Science and Innovation (TEC2010-21178-C02-02 and TEC2014-53071-C3-2-P).

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Ramón J. Durán
    • 1
    Email author
  • Natalia Fernández
    • 1
  • Domenico Siracusa
    • 2
  • Antonio Francescon
    • 2
  • Ignacio de Miguel
    • 1
  • Ignacio Rodríguez
    • 1
  • Juan Carlos Aguado
    • 1
  • Elio Salvadori
    • 2
  • Rubén M. Lorenzo
    • 1
  1. 1.Universidad de ValladolidValladolidSpain
  2. 2.CREATE-NETTrentoItaly

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