Abstract
Feature Issue on High Availability in Optical Networks
The availability requirements for today's networks are very high. Higher
availability often comes with a higher cost. We describe several steps required
for estimating the costs of realistic network scenarios. Capital expenditures
(CapEx) and operational expenditures (OpEx) are classified. An activity-based
approach is used to quantify the cost of the event-driven operational processes
such as repair and service provisioning. We discuss activity duration and
availability parameters as required input data, which are necessary for calculating
the processes' costs for realistic network scenarios. The relevant availability
measures for an IP-over-Optical network are described using a triplet representation
with optimistic, nominal, and conservative values. The model is applied to
a reference German network scenario.
© 2006 Optical Society of America
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