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arXiv · 2505.07278

Coordinated Spatial Reuse Scheduling With Machine Learning in IEEE 802.11 MAPC Networks

Maksymilian Wojnar·Wojciech Ciężobka·Artur Tomaszewski·Piotr Chołda·Krzysztof Rusek·Katarzyna Kosek-Szott·Jetmir Haxhibeqiri·Jeroen Hoebeke·Boris Bellalta·Anatolij Zubow·Falko Dressler·Szymon Szott
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Abstract

The densification of Wi-Fi deployments means that fully distributed random channel access is no longer sufficient for high and predictable performance. Therefore, the upcoming IEEE 802.11bn amendment introduces multi-access point coordination (MAPC) methods. This paper addresses a variant of MAPC called coordinated spatial reuse (C-SR), where devices transmit simultaneously on the same channel, with the power adjusted to minimize interference. The C-SR scheduling problem is selecting which devices transmit concurrently and with what settings. We provide a theoretical upper bound model, optimized for either throughput or fairness, which finds the best possible transmission schedule using mixed-integer linear programming. Then, a practical, probing-based approach is proposed which uses multi-armed bandits (MABs), a type of reinforcement learning, to solve the C-SR scheduling problem. We validate both classical (flat) MAB and hierarchical MAB (H-MAB) schemes with simulations and in a testbed. Using H-MABs for C-SR improves aggregate throughput over legacy IEEE 802.11 (on average by 80% in random scenarios), without reducing the number of transmission opportunities per station. Finally, our framework is lightweight and ready for implementation in Wi-Fi devices.

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Maksymilian Wojnar, Wojciech Ciężobka, Artur Tomaszewski, Piotr Chołda, Krzysztof Rusek, Katarzyna Kosek-Szott, Jetmir Haxhibeqiri, Jeroen Hoebeke, Boris Bellalta, Anatolij Zubow, Falko Dressler, Szymon Szott. 2025-07-04. Coordinated Spatial Reuse Scheduling With Machine Learning in IEEE 802.11 MAPC Networks. https://doi.org/10.1109/jsac.2025.3584555

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