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Dynamic provisioning of availability-constrained optical circuits in the presence of optical node failures
KTH, School of Information and Communication Technology (ICT), Optics and Photonics.ORCID iD: 0000-0001-6704-6554
2006 (English)In: Journal of Lightwave Technology, ISSN 0733-8724, E-ISSN 1558-2213, Vol. 24, no 9, 3268-3279 p.Article in journal (Refereed) Published
Abstract [en]

This paper investigates what impact optical node failures may have on wavelength-division-multiplexed networks, in which reliable end-to-end optical circuits are provisioned dynamically. At the node level, the optical cross-connect (OXC) equipment availability measure is estimated using proven component level availability models. At the network level, end-to-end optical circuits are provisioned only when the level of connection availability required by the application can be guaranteed. With the objective of yielding efficient utilization of the network resources, i.e., fibers and OXCs, circuit redundancy is achieved by means of shared path protection (SPP) switching, in combination with. differentiated reliability (DiR). The resulting optimal routing and wavelength assignment problem is proven to be NP-complete. To produce suboptimal solutions in polynomial time, a heuristic technique is presented, which makes use of a time-efficient method to estimate the end-to-end circuit availability in the presence of multiple (link and node) failures. Using the proposed heuristic, a selection of representative OXC architectures and optical switching technologies is examined to assess the influence of the node equipment choice on the overall network performance.

Place, publisher, year, edition, pages
2006. Vol. 24, no 9, 3268-3279 p.
Keyword [en]
fault tolerance, network reliability, optical fiber switches, reliability estimation, wavelength-division multiplexing, wdm mesh networks, reliability
National Category
Atom and Molecular Physics and Optics
URN: urn:nbn:se:kth:diva-15976DOI: 10.1109/JLT.2006.879505ISI: 000240319800002ScopusID: 2-s2.0-33947628660OAI: diva2:334018
QC 20100525 QC 20110927. Conference: SPIE Photonics Europe 2004 Conference. Strasbourg, FRANCE. 2004.Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2011-09-27Bibliographically approved

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