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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and O. Gerstel
  • Vol. 5, Iss. 10 — Oct. 1, 2013
  • pp: A152–A161

Hybrid Survivability Schemes Achieving High Connection Availability With a Reduced Amount of Backup Resources [Invited]

Jawwad Ahmed, Cicek Cavdar, Paolo Monti, and Lena Wosinska  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 5, Issue 10, pp. A152-A161 (2013)
http://dx.doi.org/10.1364/JOCN.5.00A152


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Abstract

Maximizing connection availability in wavelength division multiplexing (WDM) networks is critical because even small disruptions can cause huge data losses. However, there is a trade-off between the level of network survivability and the cost related to the backup resources to be provided. One-hundred percent survivability can be achieved by dedicated path protection (DPP) with multiple prereserved protection paths for each provisioned connection, i.e., DPP (1N). Unfortunately, the blocking probability performance of DPP (1N) is negatively affected by the large number of prereserved backup wavelengths standing by unutilized. On the other hand, path restoration (PR)-based solutions ensure good blocking performance at the expense of lower connection availability. The work in this paper aims at finding hybrid network survivability strategies that combine the benefits of both techniques (i.e., high availability with low blocking rate). More specifically, the paper focuses on a double link failure scenario and proposes two strategies. The first one couples DPP (11) with path restoration (referred to as DPP+PR) to minimize the number of dropped connections. The second scheme adds the concept of backup reprovisioning (BR), referred to as DPP+BR+PR, in order to further increase the connection availability achieved by DPP+PR. Integer linear programming models for the implementation of the proposed schemes are formulated. Extensive performance evaluation conducted in a path-computation-element-based WDM network scenario shows that DPP+BR+PR and DPP+PR can significantly lower the blocking probability value compared to DPP (12) without compromising too much in terms of connection availability.

© 2013 Optical Society of America

OCIS Codes
(060.4250) Fiber optics and optical communications : Networks
(060.4256) Fiber optics and optical communications : Networks, network optimization
(060.4257) Fiber optics and optical communications : Networks, network survivability
(060.4261) Fiber optics and optical communications : Networks, protection and restoration
(060.4264) Fiber optics and optical communications : Networks, wavelength assignment
(060.4265) Fiber optics and optical communications : Networks, wavelength routing

ToC Category:
OFC/NFOEC 2013

History
Original Manuscript: May 14, 2013
Revised Manuscript: August 15, 2013
Manuscript Accepted: August 16, 2013
Published: September 19, 2013

Citation
Jawwad Ahmed, Cicek Cavdar, Paolo Monti, and Lena Wosinska, "Hybrid Survivability Schemes Achieving High Connection Availability With a Reduced Amount of Backup Resources [Invited]," J. Opt. Commun. Netw. 5, A152-A161 (2013)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-5-10-A152


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