Влияние дрейфа часов на эффективность механизмов энергосбережения в сетях Wi-Fi

Информационные процессы. 2022. Т. 22. № 4. С. 261–275.

Степанова Е. А., Bankov D., Khorov E., Lyakhov A.

Decreasing devices’ energy consumption is an important problem for modern Wi-Fi networks. To address this problem, the very first version of the Wi-Fi standard introduced the basic power save mechanism. At the same time, the new IEEE 802.11ax and IEEE 802.11ba amendments describe modern power save
mechanisms: Target Wake Time (TWT) and Wake-Up Radio (WUR). The main idea of these mechanisms is to periodically turn off the main radio to reduce power consumption by not listening to the channel. However, the clock drift effect, i.e., random deviation of the station’s clock, can significantly degrade the efficiency of TWT and WUR, which schedule duty circles. The basic power save mechanism is much less affected by the clock drift effect due to periodic clock synchronization by listening to beacons, which are management frames containing network information. The paper evaluates the efficiency of the mentioned power save mechanisms with the ns-3 simulation platform. TWT and WUR mechanisms are shown to achieve lower power consumption and frame delivery delays than the basic power save mechanism even with the clock drift effect.

Keywords: энергосбережение, TWT, TWT, Power save, сети Wi-Fi, WUR, Clock Drift, Wi-Fi Networks, WUR, дрейф часов

Publication based on the results of: Development of models and methods for Network 2030 (2022)