	US 12,267,779 B2
	Power saving signals in wireless communication
Moon-il Lee, Melville, NY (US); Janet A. Stern-Berkowitz, Little Neck, NY (US); Erdem Bala, East Meadow, NY (US); and Afshin Haghighat, Ile-Bizard (CA)
Assigned to InterDigital Patent Holdings, Inc., Wilmington, DE (US)
Filed by InterDigital Patent Holdings, Inc., Wilmington, DE (US)
Filed on Feb. 10, 2023, as Appl. No. 18/108,077.
Application 18/108,077 is a continuation of application No. 17/269,099, granted, now 11,606,751, previously published as PCT/US2019/047094, filed on Aug. 19, 2019.
Claims priority of provisional application 62/825,509, filed on Mar. 28, 2019.
Claims priority of provisional application 62/805,172, filed on Feb. 13, 2019.
Claims priority of provisional application 62/765,010, filed on Aug. 17, 2018.
Prior Publication US 2023/0199654 A1, Jun. 22, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 52/02 (2009.01); H04W 76/28 (2018.01)

CPC H04W 52/0229 (2013.01) [H04W 76/28 (2018.02)]

20 Claims

1. A method implemented by a wireless transmit/receive unit (WTRU), the method comprising:

receiving configuration information indicating that the WTRU is to monitor for an energy saving signal (ESS);

receiving the ESS prior to a start of a discontinuous reception (DRX) cycle;

determining whether the received ESS corresponds to a wake up signal or a go to sleep signal;

determining whether to start a DRX on duration timer for the DRX cycle, wherein the WTRU determines to start the DRX on duration timer for the DRX cycle on condition that the received ESS corresponds to the wake up signal, and the WTRU determines to refrain from starting the DRX on duration timer for the DRX cycle on condition that the ESS corresponds to the go to sleep signal; and

starting the DRX on duration timer for the DRX cycle on condition that the ESS corresponds to the wake up signal, wherein the WTRU attempts to receive one or more physical downlink control (PDCCH) transmissions while the DRX on duration timer for the DRX cycle is running.