Blocking Probability Analysis Modeling in Spectrally-Spatially Elastic Optical Networks: A Crosstalk-Avoided Perspective

Crosstalk presents a well-defined challenging issue in spectrally-spatially elastic optical networks (SS-EONs), leading to increased blocking probability (BP). Analyzing BP analytically becomes complex due to additional constraints. Current assessments of BP in SS-EONs, particularly in multi-core multi-mode fiber (MCMMF)-based systems, heavily rely on simulation-based techniques. This paper analyzes an accurate analytical model based on a continuous-time Markov chain in SS-EONs, investigating various spectrum allocation policies with and without the spectrum contiguity constraint. To calculate BP, the analytical model produces all feasible states and their transitions while mitigating inter-core and inter-mode crosstalks. Numerical results show that analytical model and simulation studies have lower BP with CMS-FF and CMS-RF using without contiguity constraints compared to other schemes.