DRAMA-PRO: Disaster Recovery Algorithm with Mitigation Awareness for Protected Elastic Optical Networks

Elastic optical networks (EONs) have become a promising option to meet the substantial demand growth for 5G and cloud services. Due to the flexibility in resource assignment, EONs require advanced recovery mechanisms and disaster management to prevent connection loss during large-scale disasters. Traditionally, disaster recovery has focused on restoring the traffic without considering pre-disaster protection. In this paper, we consider multi-class traffic consisting of a mix of unprotected lightpaths and protected lightpaths. By utilizing the mitigation zone strategy proposed in our previous work, we present a disaster recovery algorithm with mitigation awareness for protected EONs called DRAMA-PRO. Simulation results highlight the effects of protection on disaster recovery performance and show that the proposed algorithm outperforms conventional disaster recovery algorithms.