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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and V. Chan
  • Vol. 2, Iss. 11 — Nov. 1, 2010
  • pp: 928–937

Lightpath Establishment Assisted by Offline QoT Estimation in Transparent Optical Networks

Nicola Sambo, Yvan Pointurier, Filippo Cugini, Luca Valcarenghi, Piero Castoldi, and Ioannis Tomkos  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 2, Issue 11, pp. 928-937 (2010)
http://dx.doi.org/10.1364/JOCN.2.000928


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Abstract

We propose lightpath establishment techniques for transparent optical networks, valid for both centralized path computation (i.e., performed by a path computation element—PCE ) and distributed path computation (i.e., performed by each ingress node). The proposed techniques rely on correlating the end-to-end quality of transmissions (QoT) (e.g., optical-to-signal-noise ratio—OSNR) of lightpaths already set up to evaluate the QoT of lightpaths to be established. The correlation is leveraged by two end-to-end estimation frameworks called “network kriging” and “norm l 2 minimization.” Each framework is used in turn to estimate end-to-end parameters that describe the QoT for a lightpath to be established, based on measured parameters from other lightpaths that were previously established or probed. Simulations are carried out for both PCE and distributed networking scenarios on a sample optical transparent network. The proposed lightpath establishment techniques reduce the probability that a setup attempt is unsuccessful due to unacceptable QoT and reduce the number of setup attempts to successfully establish lightpaths. Simulation results are also provided to show that our techniques permit a fast convergence of QoT information at PCE or ingress nodes in the context of dynamic networks.

© 2010 Optical Society of America

OCIS Codes
(060.1155) Fiber optics and optical communications : All-optical networks
(060.4253) Fiber optics and optical communications : Networks, circuit-switched

ToC Category:
Research Papers

History
Original Manuscript: March 2, 2010
Revised Manuscript: August 19, 2010
Manuscript Accepted: August 25, 2010
Published: October 20, 2010

Citation
Nicola Sambo, Yvan Pointurier, Filippo Cugini, Luca Valcarenghi, Piero Castoldi, and Ioannis Tomkos, "Lightpath Establishment Assisted by Offline QoT Estimation in Transparent Optical Networks," J. Opt. Commun. Netw. 2, 928-937 (2010)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-2-11-928


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