Conference Paper
Failure Aware Diverse Routing: A Novel Algorithm to Improve Availability in ASON/GMPLS Networks
Opt. Commun. Group, Univ. Politecnica de Catalunya, Barcelona
DOI: 10.1109/ICTON.2006.248434 Conference: Transparent Optical Networks, 2006 International Conference on, Volume: 3 Source: IEEE Xplore

Conference Paper: Availability analysis and Connection provisioning in overlapping shared segment protection for optical networks
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ABSTRACT: In this paper, we propose an availability analysis method for overlapping shared segment protection. We validate the proposed analysis method for different traffic demand matrices and different failure rate values. We show that the proposed analysis method achieves estimating the availability of a connection with a negligible error ratio. We then present two connection provisioning schemes, namely availability constrained generalized segment protection (ACGSP), and share ability driven availability constrained generalized segment protection (SDACGSP) that are availabilityaware adaptation of a conventional segment selection algorithm, namely the generalized segment protection (GSP). We evaluate the performance of these proposed schemes, and we show that as an enhancement to GSP, SDACGSP enhances the performance of ACGSP in terms of the availability per connection, blocking probability and availability satisfaction ratio. However, it utilizes more wavelengths in comparison to ACGSP since the more segments protects the links of the working path, the higher availability.Computer and Information Sciences, 2008. ISCIS '08. 23rd International Symposium on; 11/2008 
Conference Paper: Arranging shareability dynamically for the availabilityconstrained design of optical transport networks
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ABSTRACT: In this paper, we present a new connection provisioning algorithm for availabilityaware optical transport networks planning regarding shareability of backup channels. The proposed scheme is designed to work under shared backup path protection policy and attempts to minimize the conflict between unavailability per connection and resource overbuild. It is adapted into a conventional twostep availabilityconstrained connection provisioning scheme. We evaluate the performance of this dynamic shareability driven connection provisioning scheme in terms of unavailability per connection and resource consumption as applied to NSFNET and EON topologies. Simulation results show that dynamic shareability driven connection provisioning scheme reduces the unavailability per connection by not violating the resource consumption as much as the dedicated path protection.Computers and Communications, 2008. ISCC 2008. IEEE Symposium on; 08/2008  [Show abstract] [Hide abstract]
ABSTRACT: In this paper, we present two adaptive schemes, namely, global differentiated availabilityaware provisioning (GDAP) and linkbylink differentiated availabilityaware provisioning (LBLDAP) for connection provisioning in optical transport networks under dual failure assumption. GDAP attempts to determine a feasible sharing degree for each availability class for the links in the network globally. As an enhancement to GDAP, LBLDAP tries to determine a feasible sharing degree per availability class on each link. Connections belong to one of the five availability classes with the availability requirements of 0.98, 0.99, 0.999, 0.9999, and 0.99999, which are specified in their service level agreement (SLA). We compare the performance of the proposed schemes with a conventional service provisioning scheme, compute a feasible solution (CAFES) under the NSFNET and European optical network (EON) topologies. The simulation results show that the proposed schemes introduce better availability per connection and lower blocking probabilities. LBLDAP performs the best by monitoring the shareability status of each link periodically with respect to the metrics studied, and decreases resource overbuild.Journal of Lightwave Technology 11/2009; · 2.56 Impact Factor
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