Research Article
Dynamic provisioning of shared-backup path protected connections with guaranteed availability requirements
@INPROCEEDINGS{10.1109/ICBN.2005.1589761, author={Darli A. A. Mello and Jefferson U. Pelegrini and Rafael P. Ribeiro and Dominic A. Schupke and Helio Waldman}, title={Dynamic provisioning of shared-backup path protected connections with guaranteed availability requirements}, proceedings={2nd International ICST Conference on Broadband Networks}, publisher={IEEE}, proceedings_a={BROADNETS}, year={2006}, month={2}, keywords={}, doi={10.1109/ICBN.2005.1589761} }- Darli A. A. Mello
Jefferson U. Pelegrini
Rafael P. Ribeiro
Dominic A. Schupke
Helio Waldman
Year: 2006
Dynamic provisioning of shared-backup path protected connections with guaranteed availability requirements
BROADNETS
IEEE
DOI: 10.1109/ICBN.2005.1589761
Abstract
In optical networks, shared-backup path protection (SBPP) can optimize network resources utilization in scenarios where connection resilience requirements are not achieved without protection, but are exceeded with dedicated-path protection (DPP). However, savings in capacity allowed by backup capacity sharing are achieved at the cost of connection availability degradation. This paper presents a strategy for provisioning connections with guaranteed availability in a dynamic traffic scenario that attempts to minimize the allocation of spare capacity. Connections can be unprotected or protected by SBPP - which in some cases degenerate to DPP - depending on the connection availability requirements. This provisioning strategy employs the previously published matrix-based approach for connection unavailability estimation in SBPP protected networks which offers accurate results for networks of national size. We investigate the performance, in terms of blocking and resource sharing, of three availability classes (availability of 0.999, 0.9999 and 0.99999) that coexist in two representative network topologies without wavelength conversion. The results indicate that SBPP is a viable option for networks of national dimensions, but the backup sharing of high availability connections is strongly limited in networks of continental dimensions
