Survivable Traffic Grooming in Optical Networks with Multiple Failures

Routing connections with diverse bandwidths and protection requirements in large capacity optical networks is defined as the survivable traffic-grooming problem. As the size and the complexity of multi-granular optical networks continue to grow, dual-failures become increasingly probable. In this paper, we propose to protect multi-granular optical networks against near-simultaneous dual-failures using capacity re-provisioning and we study the performance of re-provisioning under different protection frameworks; namely, lightpath level and connection level protection. We study the performance of reprovisioning through simulation experiments, and we show that the restorability of groomed optical network against dual failures can substantially be improved