• Initially introduced in 802.11ah-2016 to help conserve power for IoT applications. • OFDMA consumes more power and hence we need power saving mechanisms with 802.11ax • Clients can request a specific wake-up time thereby conserving battery life. • AP can better manage wake-up time for connected clients, thereby reducing contention and increasing airtime efficiency • With legacy standards, all devices have to wake up at the same time (DTIM) • Also supported in 2.4 GHz. • Up to 67% lower power consumption! Access Point Client 2 Client 1 Client 1 Wait Time BEACON Sleep Sleep Sleep TRIGGER BEACON TRIGGER FRAME FRAME FRAME