Design methodologies for survivable elastic optical networks with guardband-constrained spectral allocation

The paper presents design methodologies for elastic optical networks (EONs) with due considerations to the survivability against link failures and guardband-constrained spectral allocations, using ILP and heuristic algorithms. The obtained results show that, there should be a tradeoff between the number of guardband slots and the spectrum utilization in EONs. Further, a comparative study has been carried out for blocking probabilities of general (unprotected) and survivable EONs with two different protection mechanisms, with due consideration to guardband slots.