Work

PMSA: Power Mode Selection Algorithm in IEEE 802.11 WLANs operating TWT

Year: 2025

Type: conference-paper

Abstract: Target Wake Time (TWT) is a key energy-saving mechanism in IEEE 802.11 WLANs, allowing stations (STAs) to reduce power consumption by restricting transmissions to scheduled service periods (SPs). Despite its potential, TWT remains underutilized due to concerns over performance degradation, especially under congested network conditions. In this paper, we address this limitation by proposing the Power Mode Selection Algorithm (PMSA), a lightweight and standard-compliant mechanism implemented at the Access Point (AP). PMSA operates on top of existing TWT schedulers and dynamically determines whether each STA should operate in power save (PS) mode or temporarily switch to active mode (and disable TWT) based on current network congestion. Our simulation results demonstrate that PMSA enhances the robustness of TWT scheduling by adapting to traffic conditions, maintaining low delays and avoiding packet losses even under heavy load, while preserving energy savings when feasible.

DOI: 10.1109/mswim67937.2025.11308936

Authors: Loïc Desgeorges, Thomas Begin, Isabelle Guérin Lassous

Institutions: Lyon 1 Université, École Normale Supérieure de Lyon, Centre National de la Recherche Scientifique, Laboratoire de l'Informatique du Parallélisme

Language: English

Topic: Wireless Networks and Protocols

Subfield: Computer Networks and Communications

Field: Computer Science

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: green

Funder: Agence Nationale de la Recherche

Award: FACTO: A Multi-Purpose Wi-Fi Network for a Low-Consumption Smart Home