RESILIENT AND FRAGMENTATION-AWARE MULTICAST ROUTING IN DYNAMIC DATA CENTER-ORIENTED SDM-EONS

The rise of cloud services and data centers impose new challenges on optical networks, particularly in terms of capacity, resilience, and spectral efficiency. Spatial multiplexed elastic optical networks (SDM-EONs) represent a promising solution, although they face issues of spectral fragmentation, inter-core crosstalk, and fault tolerance. In this context, we propose DC-F-MRSA, a multicast extension of the DC-F-RSCA algorithm, designed to dynamically manage multicast traffic demands from data centers. This approach combines optimized core classification, a link and center fault protection strategy, and a core selection mechanism minimizing fragmentation and crosstalk. Experimental results on COST239 and NSFNET topologies show significant performance in terms of blocking rate, fragmentation, and fault robustness.