Dynamic p-cycle configuration in spectrum-sliced elastic optical networks

We propose three algorithms for dynamic pre-configured-cycle (p-cycle) configuration in the spectrum-sliced elastic optical networks (EONs) based on the optical orthogonal frequency-division multiplexing (O-OFDM) technology, aiming to provide 100% restoration against single-link failures. The first one (PE-p-cycle) configures the working path and p-cycles of a request together according to the protection efficiencies of the p-cycles. In order to reduce request blocking probability, we then propose to use the spectrum planning technique to regulate the spectra of working and protection resources and design two algorithms based on the protected working capacity envelope (PWCE) cycles (PWCE-p-cycle-SP) and Hamiltonian cycles (Ham-p-cycle-SP). The three algorithms are then evaluated in two mesh network topologies, using dynamic Poisson traffic. The simulation results indicate that with the spectrum planning, PWCE-p-cycle-SP and Ham-p-cycle-SP reduce the blocking probability effectively, when comparing with the one without it, i.e., PE-p-cycle. To the best of our knowledge, this is the first attempt to address dynamic p-cycle configuration in EONs.