Title :
Flow availability analysis in two-layer networks with dedicated path protection at the upper layer
Author :
Ni, Wenda ; Wu, Jing ; Huang, Changcheng ; Savoie, Michel
Author_Institution :
Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, ON, Canada
Abstract :
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.
Keywords :
failure analysis; telecommunication network reliability; dedicated path protection; flow availability analysis; lower-layer links; two-layer networks; upper-layer failure correlations; upper-layer failure tracing; upper-layer flows; Analytical models; Availability; Computational modeling; Network topology; Numerical models; Simulation; Topology;
Conference_Titel :
Communications (ICC), 2012 IEEE International Conference on
Conference_Location :
Ottawa, ON
Print_ISBN :
978-1-4577-2052-9
Electronic_ISBN :
1550-3607
DOI :
10.1109/ICC.2012.6364266