GLOBECOM 2005 Tutorial

Friday, 2 December
Majestic Ballroom H / Level Two / Renaissance Grand Hotel

Title:   TU12 Availability-Based Service Provisioning in Optical Networks

Duration : Half Day/ 9:00AM-12:00 Noon

Instructor : Dominic A. Schupke, Siemens, Germany

Abstract:
Every optical transport network service is subject to potential outage caused by failures within the network. Using different recovery mechanisms, the availability of a service can be improved, in order to achieve a desired availability level for the customer. This availability level is typically fixed in a service level agreement (SLA) between the customer and the network operator.

In traditional approaches, paths in the network are provisioned without inclusion of the service availability. In a subsequent step the service availability is calculated and its availability satisfaction is checked. Further consideration is needed if the desired availability is not reached. Novel approaches take service availability directly into account. Thus, the path design can guarantee that target availabilities are met. The aim is to achieve design optimality subject to availability constraints, which are, however, often challenging because of their non-linear nature. Several solutions have been recently proposed.

After establishing a terminology and model framework, the tutorial summarizes these approaches and identifies further research issues within the field. Many of the methodologies do not only apply to optical networks, but are also usable for other network technologies.