Synergistic Resource Allocation in Space Division Multiplexed Data Center Optical Networks Secured with Quantum Key Distribution

In this article, we propose two novel core prioritization and crosstalk aware (CP-XT-Aware) algorithms, including CP-XT-Aware with wavelength grouping (CPWG-XT-Aware) and CP-XT-Aware with wavelength reservation (CPWR-XT-Aware), aiming to realize the synergistic transmission of classical and quantum signals in quantum key distribution (QKD)-enabled optical data center networks based on wavelength-division-multiplexing and space-division-multiplexing, For comparison, we introduce the core and wavelength random allocation without XT-Aware, called the CWRA. Analytical simulations show that the both proposed algorithms can simultaneously improve the average secure key rate and reduce blocking probabilities under dynamic traffic scenarios in different network topologies, compared to the CWRA. Particularly, the CPWG-XT-Aware performs exceptionally well in QKD under the low traffic load, while the CPWR-XT-Aware excels under the high traffic load.