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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and V. Chan
  • Vol. 4, Iss. 1 — Jan. 1, 2012
  • pp: 15–24

Optimized Monitor Placement for Accurate QoT Assessment in Core Optical Networks

Marianna Angelou, Yvan Pointurier, Davide Careglio, Salvatore Spadaro, and Ioannis Tomkos  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 4, Issue 1, pp. 15-24 (2012)
http://dx.doi.org/10.1364/JOCN.4.000015


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Abstract

Network operators deploy optical monitors to ensure uninterrupted network operation and high quality of service. To achieve this they seek efficient design solutions that also maximize the benefit of their investments. In this work we present a monitoring technique that utilizes partial physical layer information generated by only a small set of monitors deployed in a mesh optical network to assess the quality of transmission (QoT) of all the established connections. The proposed method focuses on the placement of the monitors and on the minimization of the required monitoring equipment. We develop a heuristic that takes advantage of the attribute of certain end-to-end impairments that accumulate additively along the established lightpaths in order to find the optimum locations of a reduced number of available monitors. When monitoring a subset of the established lightpaths, it is possible to estimate the monitored QoT-related metric for all lightpaths leveraging the correlation between the connections sharing common links. The proposed algorithm efficiently selects the monitor locations that maximize the estimation accuracy. Extensive simulation studies show that the heuristic provides solutions close to the optimum and demonstrate that only a fraction of all the available monitor locations (1/4 or 1/3) need to be equipped, leading to significant cost savings. The monitor placement solutions are evaluated for core optical networks of different scales in the presence of static and incremental traffic.

© 2011 OSA

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4250) Fiber optics and optical communications : Networks
(060.4256) Fiber optics and optical communications : Networks, network optimization

ToC Category:
Research Papers

History
Original Manuscript: June 9, 2011
Revised Manuscript: November 4, 2011
Manuscript Accepted: November 16, 2011
Published: December 7, 2011

Citation
Marianna Angelou, Yvan Pointurier, Davide Careglio, Salvatore Spadaro, and Ioannis Tomkos, "Optimized Monitor Placement for Accurate QoT Assessment in Core Optical Networks," J. Opt. Commun. Netw. 4, 15-24 (2012)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-4-1-15


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