Cross layer optimization of static lightpath demands in transparent WDM optical networks

Kostas Christodoulopoulos, K. Manousakis, E. A. Varvarigos

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

9 Citations (Scopus)


We consider the offline version of the impairment-aware routing and wavelength assignment (IA-RWA) problem in transparent all-optical networks as a cross layer optimization problem. In optical networks and in the absence of regenerators, optical signal quality degrades due to physical layer impairments. We initially present an algorithm for solving the RWA problem based on an LP relaxation formulation that has acceptable integrality performance. To account for signal degradation due to physical layer impairments we extend our RWA formulation and constrain the interference among lightpaths using noise variance related parameters. The objective of the resulting optimization problem is not only to serve the connection requests by minimizing he number of utilized wavelengths, but also to select lightpaths that have acceptable physical layer performance.

Original languageEnglish
Title of host publicationProceedings - 2009 IEEE Information Theory Workshop on Networking and Information Theory, ITW 2009
Number of pages5
Publication statusPublished - 2009
Externally publishedYes
EventIEEE Information Theory Workshop on Networking and Information Theory 2009 - University of Thessaly, Volos, Greece
Duration: 10 Jun 200912 Jun 2009


ConferenceIEEE Information Theory Workshop on Networking and Information Theory 2009
Abbreviated titleITW 2009
Internet address


  • Cross layer optimization
  • Physical layer impairments
  • Routing and wavelength assignment
  • Transparent alloptical networks

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