Online impairments-aware routing within a path computation element

F. Solano, M. Zotkiewicz, Michal Pioro

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review


A Path Computation Element (PCE) is a computing device in a network capable of calculating paths. Once a PCE receives a path computation request, the PCE is suppose to provide a response within a reasonable short time. However, computing a feasible path is not a straightforward task, since the computational problem must consider several constraints in a short time. In this paper we propose an algorithm for light-paths computation for this purpose that is intended to comply with the PCE standard. Our algorithm considers optical impairments, wavelength conversion and nodes with limited switching capabilities. Optical impairments are estimated using a Q-factor. The routing problem is solved using Multi-Constrained Shortest Path exact algorithm.
Original languageEnglish
Title of host publication[Host publication title missing]
PublisherIEEE - Institute of Electrical and Electronics Engineers Inc.
ISBN (Print)978-1-4244-5825-7
Publication statusPublished - 2009
Event43rd annual Asilomar conference on signals, systems and computers, 2009 - Pacific Grove, CA, Pacific Groove, CA, United States
Duration: 2009 Nov 12009 Nov 4
Conference number: 43

Publication series

ISSN (Print)1058-6393


Conference43rd annual Asilomar conference on signals, systems and computers, 2009
Country/TerritoryUnited States
CityPacific Groove, CA

Subject classification (UKÄ)

  • Electrical Engineering, Electronic Engineering, Information Engineering


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