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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and O. Gerstel
  • Vol. 4, Iss. 2 — Feb. 1, 2012
  • pp: 78–91

Multi-layer Virtual Topology Design in Optical Networks Under Physical Layer Impairments and Multi-hour Traffic Demand

Namik Sengezer and Ezhan Karasan  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 4, Issue 2, pp. 78-91 (2012)
http://dx.doi.org/10.1364/JOCN.4.000078


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Abstract

In this paper, we consider the virtual topology design (VTD) problem in multi-protocol label switching (MPLS)/wavelength division multiplexing (WDM) networks with an hourly changing traffic pattern, in the presence of physical layer impairments. We propose a multi-layer VTD scheme that satisfies the constraints in both layers with guaranteed bit error rates assuming no wavelength conversion. The proposed scheme involves interaction of the control planes of MPLS and WDM layers and can be applied without the necessity of a unified control plane. When the virtual topology is designed by considering only MPLS layer constraints, some lightpaths in the designed topology cannot be established, and this may result in a large amount of blocked traffic. We show that, by applying interaction between MPLS and WDM layers during topology design, the blocking ratio is reduced by an amount between 53% and 89% in the investigated cases. We also propose different information sharing strategies between the layers and show that, if physical layer information is available to the MPLS layer, a better blocking performance can be achieved and physical layer resource usage can be reduced by an amount up to 21%.

© 2012 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
(060.4256) Fiber optics and optical communications : Networks, network optimization
(060.4258) Fiber optics and optical communications : Networks, network topology

ToC Category:
Research Papers

History
Original Manuscript: April 8, 2011
Revised Manuscript: October 31, 2011
Manuscript Accepted: December 13, 2011
Published: January 9, 2012

Citation
Namik Sengezer and Ezhan Karasan, "Multi-layer Virtual Topology Design in Optical Networks Under Physical Layer Impairments and Multi-hour Traffic Demand," J. Opt. Commun. Netw. 4, 78-91 (2012)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-4-2-78

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