Flow availability analysis in two-layer networks with dedicated path protection at the upper layer

We propose an analytical model that computes availability of upper-layer flows in two-layer networks with dedicated path protection deployed at the upper layer. Our proposed model reduces overestimation of the existing model caused by the ignorance of upper-layer failure correlations. We compute the...

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Bibliographic Details
Main Authors: Wenda Ni, Jing Wu, Changcheng Huang, Savoie, M.
Format: Conference Proceeding
Language:English
Subjects:
Analytical models
Availability
Computational modeling
Network topology
Numerical models
Simulation
Topology
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Description
Summary:We propose an analytical model that computes availability of upper-layer flows in two-layer networks with dedicated path protection deployed at the upper layer. Our proposed model reduces overestimation of the existing model caused by the ignorance of upper-layer failure correlations. We compute the flow availability by properly taking into account such correlation, and tracing upper-layer failures to lower-layer root causes. Our simulation results show that our proposed model reduces overestimation on upper-layer flow unavailability by about 30%, and thus significantly relaxes unnecessary high-availability requirements on lower-layer links without compromising the availability of upper-layer flows.
ISSN:1550-3607
1938-1883
DOI:10.1109/ICC.2012.6364266