One of the major concerns of optical network operators isrelated to improving the availability of services provided totheir highest-class clients through the use of different protectionschemes. However, the majority of the work concerning protectionschemes considered the primary connections as equally importantwhen contending for the use of the backup resources. As a firstcontribution we therefore propose an improvement of the existingshared protection schemes through the introduction of relativepriorities among the different primary connections contendingfor the access to the protection path. Moreover, as a secondcontribution, we propose to include a novel service differentiationparameter, the service disruption rate of a connection, to providedifferentiated services in a WDM mesh network, and we motivatethe use of such a parameter with numerical examples. As athird contribution, we present a mathematical model for both theclassical protection schemes and for the proposed priority-awarescheme. As a key distinguishing feature from existing literaturewe derive explicit analytic expressions for the average availabilityand service disruption rate resulting from the deployment of suchschemes. By solving these models we then evaluate numericallythe benefits of the service differentiation feature introduced inour scheme as well as the impact of the service disruption rate asservice differentiator.

A novel protection scheme for QoS aware WDM networks

MARTIGNON, Fabio
2005-01-01

Abstract

One of the major concerns of optical network operators isrelated to improving the availability of services provided totheir highest-class clients through the use of different protectionschemes. However, the majority of the work concerning protectionschemes considered the primary connections as equally importantwhen contending for the use of the backup resources. As a firstcontribution we therefore propose an improvement of the existingshared protection schemes through the introduction of relativepriorities among the different primary connections contendingfor the access to the protection path. Moreover, as a secondcontribution, we propose to include a novel service differentiationparameter, the service disruption rate of a connection, to providedifferentiated services in a WDM mesh network, and we motivatethe use of such a parameter with numerical examples. As athird contribution, we present a mathematical model for both theclassical protection schemes and for the proposed priority-awarescheme. As a key distinguishing feature from existing literaturewe derive explicit analytic expressions for the average availabilityand service disruption rate resulting from the deployment of suchschemes. By solving these models we then evaluate numericallythe benefits of the service differentiation feature introduced inour scheme as well as the impact of the service disruption rate asservice differentiator.
book chapter - capitolo di libro
2005
Pujolle, Guy; Fawaz, Wissam; Chen, Ken; Martignon, Fabio
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/20600
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