Designing fast and bandwidth efficient protection scheme for WDM optical networks

Yu Lin, Haitham S. Hamza, Jitender S. Deogun

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


In this paper, we introduce the Pre-cross-connected Segment First - PXSFirst protection scheme; a new path-based protection schemes for WDM optical networks. The goal of the PXSFirst scheme is to achieve fast recovery, while maximizing bandwidth sharing to improve bandwidth utilization. Similar to pre-cross-connected trails (PXTs) protection scheme, PXSFirst ensures that all backup paths are pre-cross-connected, and hence eliminates the switching configuration delay along backup paths. However, unlike the PXT scheme, where backup paths can only share trails, PXSFirst breaks backup paths into smaller segments by existing end nodes, and hence, increases the possibility of bandwidth sharing. Extensive simulation results for different network topologies and under different traffic patterns show that the proposed scheme has better blocking performance and less bandwidth utilization (an average of 11.0% reduction) compared to existing PXT protection schemes.

Original languageEnglish (US)
Title of host publicationNetworking 2006 - Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Com. Syst. - 5th Int. IFIP-TC6 Netw. Conf. Proc.
EditorsThomas Plagemann, Burkhard Stiller, Cedric Westphal, Fernando Boavida, Edmundo Monteiro
PublisherSpringer Verlag
Number of pages12
ISBN (Electronic)9783540341925
ISBN (Print)3540341927, 9783540341925
StatePublished - 2006
Externally publishedYes
Event5th International IFIP-TC6 Networking Conference, Networking 2006 - Coimbra, Portugal
Duration: May 15 2006May 19 2006

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume3976 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Conference5th International IFIP-TC6 Networking Conference, Networking 2006

ASJC Scopus subject areas

  • Theoretical Computer Science
  • General Computer Science


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