Span Restoration in Optical Networks with Limited Wavelength Conversion

Sarah Renée Ruepp, Jakob Due Buron, N Andriolli, Henrik Wessing

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

316 Downloads (Pure)

Abstract

Next generation optical networks provide functionalities to dynamically provision and recover connections, while emerging technologies allow for the conversion between wavelengths. These devices are however expensive and hence it is likely that only few are deployed throughout the network. Accordingly, the unavailability of wavelength converters decreases the chance for successful connection establishment, especially in the recovery phase, where several restoration requests try to access a limited pool of resources. The recently proposed suggested vector scheme has been designed to perform converter-saving wavelength assignment in GMPLS networks. The converter saving property of the Suggested Vector is particularly desirable in span restoration, where the pre-failure path stubs have to be merged to the restoration path at the failure-adjacent nodes. In order to avoid wavelength conversion at the merging nodes, the wavelength of the connection stubs can be considered. In this study, we evaluate the recovery performance of the suggested vector scheme and a scheme exploiting standard protocol extensions only. The behavior of both schemes with a stub-aware extension for span restoration is also assessed. Our simulations show that the Suggested Vector scheme achieves a higher recovery performance than the standard scheme. Both schemes benefit from the stub-aware modification. The performance increase is especially predominant if few wavelength converters are available and at medium load ranges. Furthermore, we describe different scenarios to extend the suggested vector wavelength assignment scheme to multi-domain networks with focus on span restoration.
Original languageEnglish
Title of host publicationSecond International Conference on Communications and Networking in China, 2007. CHINACOM '07.
PublisherIEEE
Publication date2007
ISBN (Print)978-1-4244-1008-8
DOIs
Publication statusPublished - 2007
EventSecond International Conference on Communications and Networking in China, 2007. - Shanghai
Duration: 1 Jan 2007 → …

Conference

ConferenceSecond International Conference on Communications and Networking in China, 2007.
CityShanghai
Period01/01/2007 → …

Bibliographical note

Copyright: 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

Fingerprint Dive into the research topics of 'Span Restoration in Optical Networks with Limited Wavelength Conversion'. Together they form a unique fingerprint.

Cite this