Loopback recovery from neighboring double-link failures in WDM mesh networks

  • Authors:
  • Hongsik Choi;Suresh Subramaniam;Hyeong-Ah Choi

  • Affiliations:
  • Division of Information and Communication Engineering, Hallym University, Chunchon, South Korea;Department of ECE, George Washington University, Washington, DC;Department of Computer Science, George Washington University, Washington, DC

  • Venue:
  • Information Sciences—Informatics and Computer Science: An International Journal - Special issue: Photonics, networking & computing
  • Year:
  • 2003

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Abstract

Traditional survivable network design assumes that at any time at most a single link or node fails. In optical networks, a single point of failure may lead to the failure of multiple links. In this paper, we consider the design of an optical network that can survive the failures of any two neighboring links. We present a loopback recovery method that requires the computation of backup paths for each link. An optimal algorithm for computing the backup paths is presented. Numerical results comparing the performance of our algorithm with other loopback approaches indicate that a slight increase in capacity can achieve 100% protection under this failure model.