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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and V. Chan
  • Vol. 3, Iss. 11 — Nov. 1, 2011
  • pp: 816–829

Power-Aware Routing and Wavelength Assignment in Multi-Fiber Optical Networks

Angelo Coiro, Marco Listanti, Alessandro Valenti, and Francesco Matera  »View Author Affiliations

Journal of Optical Communications and Networking, Vol. 3, Issue 11, pp. 816-829 (2011)

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This paper focuses on the energy consumption minimization problem of an optical transport network extending over a very wide area. In particular, the specific problem of power-aware routing and wavelength assignment (PA-RWA) is addressed considering a transparent multi-fiber optical network. An integer linear programming formulation is provided for the static lightpath establishment problem and a few heuristics are proposed to solve the problem in the case of dynamic lightpath establishment. To solve the routing problem we propose a novel algorithm named load based cost; it is based on a cost function that considers the load of each optical fiber to compute link weights. We also propose two new wavelength assignment algorithms: the first one is derived from the first fit heuristic whilst the second one is based on an innovative approach. It works like a least cost routing algorithm assigning a cost to each wavelength for each link in the path and then minimizes the total cost. Our proposal is compared with a number of already known RWA algorithms showing that it is able to reduce the power consumption of the network by about 20–30%, depending on the amount of traffic treated, with respect to state of the art algorithms with a difference of about 10% with respect to the lower bound. In order to provide a complete analysis of the feasibility of the proposed heuristics, the blocking probability is evaluated: the results show that, unlike the other power-aware algorithms here considered, our proposal shows a low impairment with respect to the least congested path–first fit alternative. Another important result regards the better performance of the proposed wavelength assignment algorithm with respect to first fit.

© 2011 OSA

OCIS Codes
(060.1155) Fiber optics and optical communications : All-optical networks
(060.4251) Fiber optics and optical communications : Networks, assignment and routing algorithms
(060.4265) Fiber optics and optical communications : Networks, wavelength routing

ToC Category:
Research Papers

Original Manuscript: May 5, 2011
Revised Manuscript: August 8, 2011
Manuscript Accepted: September 6, 2011
Published: October 8, 2011

Angelo Coiro, Marco Listanti, Alessandro Valenti, and Francesco Matera, "Power-Aware Routing and Wavelength Assignment in Multi-Fiber Optical Networks," J. Opt. Commun. Netw. 3, 816-829 (2011)

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