Resilient Routing for SDM-EON as a Crucial Enabler for the 5G Access Networks

Due to the rapid growth of traffic supported by the 5th generation of mobile communication systems (5G) networks on the Internet backbone, concepts such as space-division mul-tiplexing elastic optical networks have gained prominence as a possible solution to the future scarcity of resources. Considering the growing volume of data that the core of the network can transport simultaneously, the resilience of these networks becomes increasingly indispensable. This paper proposes a routing and resource allocation algorithm for space-division multiplexing elastic optical networks (for 5G scenarios), which has a traffic priority-aware protection mechanism and uses preemption to save protection resources, enabling a wide variety of 5G services, new verticals, and a rich set of use cases. The results demonstrate the effectiveness of the proposed algorithm in establishing connections with high priority concerning similar algorithms in the literature, reducing the probability of bandwidth blocking by up to 17 % for this type of traffic.