Addressing node failures in all-optical networks

Sun Il Kim, Steven Lumetta

Research output: Contribution to journalArticlepeer-review


We investigate the effectiveness of link-protection schemes in terms of their ability to handle node failures in all-optical networks. We focus on node recovery, using a ring-based scheme (double-cycle cover; DCC) and generalized loopback. Comparisons are made by introduction of metrics that measure a protection scheme's effectiveness in handling node failures. We also introduce measures that quantify failure impact, the degree to which a network is left vulnerable to a failure after a previous failure has been successfully recovered. Comparison with DCC for five sample networks shows that generalized loopback is more robust against node failures and can provide the same level of reliability while using 16% less capacity on average over five sample networks.

Original languageEnglish (US)
Pages (from-to)154-163
Number of pages10
JournalJournal of Optical Networking
Issue number4
StatePublished - Jan 1 2002
Externally publishedYes


  • (060.4250) Fiber optics and optical communications : Networks
  • (060.4510) Fiber optics and optical communications : Optical communications

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Computer Science Applications
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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