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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editor: Keren Bergman
  • Vol. 7, Iss. 6 — Jun. 1, 2008
  • pp: 617–634

Design and analysis of partial protection mechanisms in groomed optical WDM mesh networks

Mahesh Sivakumar, Jing Fang, Krishna M. Sivalingam, and Arun K. Somani  »View Author Affiliations


Journal of Optical Networking, Vol. 7, Issue 6, pp. 617-634 (2008)
http://dx.doi.org/10.1364/JON.7.000617


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Abstract

We consider the problem of survivable network design in traffic-groomed optical WDM mesh networks that support subwavelength capacity connections. In typical survivable network designs, individual sessions are provided either full protection or no protection. We consider a quality of protection (QoP) framework where a connection is provided partial protection, i.e., when a link failure occurs on the primary path, the protection bandwidth provided on the backup path is less than or equal to the primary bandwidth. Each connection request specifies the primary bandwidth and a minimum backup bandwidth required. The network will guarantee at least the minimum backup bandwidth and, if capacity is available, higher backup bandwidth up to the primary path's bandwidth. The advantage of such a model is that it can reduce backup capacity requirements based on connection needs leading to lower blocking probability and lower network costs. We consider two scenarios: (i) a network with static traffic that is designed using an integer linear program (ILP) formulation and (ii) a network with dynamic traffic for which we present a heuristic connection admission control algorithm that prevents backup resource contention during recovery from a link failure. The results quantify the gain in blocking probability for different partial protection scenarios. The mechanism proposed to counter backup contention is seen to provide an average of 120% reduction in the contention among backup paths of connections traversing a link, especially when the number of wavelengths in each link is small.

© 2008 Optical Society of America

OCIS Codes
(060.4251) Fiber optics and optical communications : Networks, assignment and routing algorithms
(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

ToC Category:
Reliability Issues in Optical Networks

History
Original Manuscript: November 6, 2007
Revised Manuscript: March 3, 2008
Manuscript Accepted: March 29, 2008
Published: May 14, 2008

Virtual Issues
Reliability Issues in Optical Networks (2008) Journal of Optical Networking

Citation
Mahesh Sivakumar, Jing Fang, Krishna M. Sivalingam, and Arun K. Somani, "Design and analysis of partial protection mechanisms in groomed optical WDM mesh networks," J. Opt. Netw. 7, 617-634 (2008)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jon-7-6-617

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