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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: O. Gerstel and P. Iannone
  • Vol. 6, Iss. 7 — Jul. 1, 2014
  • pp: 649–659

Optimal Design for Shared Backup Path Protected Elastic Optical Networks Under Single-Link Failure

Gangxiang Shen, Yue Wei, and Sanjay K. Bose  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 6, Issue 7, pp. 649-659 (2014)
http://dx.doi.org/10.1364/JOCN.6.000649


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Abstract

This paper considers the network protection technique of shared backup path protection (SBPP) in comparison with 1 + 1 path protection for elastic optical networks. We develop integer linear programming (ILP) models to minimize both the required spare capacity and the maximum number of link frequency slots (FSs) used. We consider transponder tunability that corresponds to the condition of whether or not the same set of FSs is required to be used for both the working and protection lightpaths. We also apply the bandwidth squeezed restoration technique to obtain the maximum restoration levels for the affected service flows, subject to a limited FS capacity on each fiber link. Our studies show that the proposed SBPP technique requires much lower spare capacity compared to the traditional 1 + 1 path protection approach. The flexibility of allowing the working and protection lightpaths to use different sets of FSs (i.e., with full transponder tunability) has the advantage of reducing both the number of FSs needed and the spare capacity redundancy required.

© 2014 Optical Society of America

OCIS Codes
(060.4250) Fiber optics and optical communications : Networks
(060.4251) Fiber optics and optical communications : Networks, assignment and routing algorithms
(060.4257) Fiber optics and optical communications : Networks, network survivability
(060.4261) Fiber optics and optical communications : Networks, protection and restoration

ToC Category:
Research Papers

History
Original Manuscript: November 22, 2013
Revised Manuscript: April 28, 2014
Manuscript Accepted: May 23, 2014
Published: June 30, 2014

Citation
Gangxiang Shen, Yue Wei, and Sanjay K. Bose, "Optimal Design for Shared Backup Path Protected Elastic Optical Networks Under Single-Link Failure," J. Opt. Commun. Netw. 6, 649-659 (2014)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-6-7-649

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