Quantum-Aware Network Planning and Integration

• URL: http://arxiv.org/abs/2505.05351v1
• Date: Thu, 08 May 2025 15:41:34 GMT
• Title: Quantum-Aware Network Planning and Integration
• Authors: Cédric Ware, Mounia Lourdiane,
• Abstract summary: There is a need for having quantum signals coexist with classical traffic over the same physical medium.<n>Efforts are now underway to integrate QKD at the network level.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In order to broaden the adoption of highly-demanded quantum functionalities such as QKD, there is a need for having quantum signals coexist with classical traffic over the same physical medium, typically optical fibers in already-deployed networks. Beyond the experimental point-to-point demonstrations of the past few years, efforts are now underway to integrate QKD at the network level: developing interfaces with the software-defined-network ecosystem; but also network planning tools that satisfy physical-layer contraints jointly on the classical and quantum signals. We have found that in certain situations, na\"ive network planning prioritizing quantum traffic drastically degrades classical capacity, whereas a quantum-aware wavelength assignment heuristic allows coexistence with minimal impact on both capacities. More such techniques will be required to enable widespread deployment of QKD and other future quantum functionalities.

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