A multicost approach to online impairment-aware RWA

Kostas Christodoulopoulos, K. Manousakis, E. A. Varvarigos, M. Angelou, Ioannis Tomkos

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

3 Citations (Scopus)


We design and implement a multicost impairment-aware routing and wavelength assignment algorithm for online traffic. In transparent optical networks the quality of a transmission degrades due to physical layer impairments. To serve a connection, the proposed algorithm finds a path and a free wavelength (a lightpath) that has acceptable signal quality performance by estimating a quality of transmission measure, called the Q factor. We take into account channel utilization in the network, which changes as new connections are established or released, in order to calculate the noise variances that correspond to physical impairments on the links. These, along with the time invariant eye impairment penalties of all candidate network paths, form the inputs to the algorithm. The multicost algorithm finds a set of so called non-dominated Q paths from the given source to the given destination. Various objective functions are then evaluated in order to choose the optimal lightpath to serve the connection. The proposed algorithm combines the strength of multicost optimization with low execution time, making it appropriate for serving online connections.

Original languageEnglish
Title of host publicationProceedings - 2009 IEEE International Conference on Communications, ICC 2009
PublisherIEEE, Institute of Electrical and Electronics Engineers
ISBN (Print)9781424434350
Publication statusPublished - 2009
Externally publishedYes
EventIEEE International Conference on Communications 2009: A Tradition of Innovation - International Congress Center Dresden, Dresden, Germany
Duration: 14 Jun 200918 Jun 2009
http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=5198563 (IEEE Conference Proceedings)


ConferenceIEEE International Conference on Communications 2009
Abbreviated titleICC 2009
OtherSince 1965 the IEEE International Conference on Communications is one of the flagship conferences of the IEEE Communications Society. It brings together the world's leading scientists from academia and industry. Recent advances in the field of communications will be presented, thereby facilitating scientific idea exchange, the identification of future trends in communications, and the illumination of business opportunities. The conference has been hosted at the International Congress Center, located at the scenic banks of the Elbe river and embedded in the cultural center of Dresden.
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