Channel-Based ICXT- and NLI-Aware Service Provisioning for Multi-Band Over SDM Systems

The relentless surge in bandwidth demands fueled by 5G and beyond necessitates a paradigm shift in optical network design. This paper introduces a novel, channel-based resource allocation framework for multi-band over space-division multiplexing optical networks, meticulously addressing the intertwined challenges of inter-core crosstalk (ICXT), inter-channel stimulated Raman scattering (ISRS), and fiber non-linear impairments. By leveraging a sophisticated generalized signal-to-noise ratio model that dynamically accounts for frequency-dependent ICXT and ISRS, we propose two innovative algorithms-Core-Spectrum-Band (CSB) and Band-Spectrum-Core (BSC)-to optimize resource allocation for multi-core fiber (MCF) and compare their performance with bundled multi-fiber pair (BuMFP) architectures. Extensive simulations on the US Backbone network demonstrate the superior performance of our approach, significantly reducing blocking probability. Specifically, in a network with seven cores/fibers, BSC with MCF reduced the blocking probability by approximately 70% and 20% compared to BuMFPs and CSB with MCF, respectively, on average across traffic loads ranging from 1000 to 1450 Tbps.