NDLI: Dynamic provisioning of shared-backup path protected connections with guaranteed availability requirements

Content Provider	IEEE Xplore Digital Library
Author	Mello, D.A.A. Pelegrini, J.U. Ribeiro, R.P. Schupke, D.A. Waldman, H.
Copyright Year	2005
Description	Author affiliation: Lab. of Opt. Networking, State Univ. of Campinas (Mello, D.A.A.; Pelegrini, J.U.; Ribeiro, R.P.)
Abstract	In optical networks, shared-backup path protection (SBPP) can optimize network resources utilization in scenarios where connection resilience requirements are not achieved without protection, but are exceeded with dedicated-path protection (DPP). However, savings in capacity allowed by backup capacity sharing are achieved at the cost of connection availability degradation. This paper presents a strategy for provisioning connections with guaranteed availability in a dynamic traffic scenario that attempts to minimize the allocation of spare capacity. Connections can be unprotected or protected by SBPP - which in some cases degenerate to DPP - depending on the connection availability requirements. This provisioning strategy employs the previously published matrix-based approach for connection unavailability estimation in SBPP protected networks which offers accurate results for networks of national size. We investigate the performance, in terms of blocking and resource sharing, of three availability classes (availability of 0.999, 0.9999 and 0.99999) that coexist in two representative network topologies without wavelength conversion. The results indicate that SBPP is a viable option for networks of national dimensions, but the backup sharing of high availability connections is strongly limited in networks of continental dimensions
Starting Page	1320
Ending Page	1327
File Size	820501
Page Count	8
File Format	PDF
ISBN	0780392760
DOI	10.1109/ICBN.2005.1589761
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-10-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Protection Availability Optical fiber networks Resilience Costs Degradation Telecommunication traffic Resource management Network topology Optical wavelength conversion
Content Type	Text
Resource Type	Article

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