US 12,323,917 B2
Communications devices, infrastructure equipment and methods
Martin Warwick Beale, Basingstoke (GB); and Shin Horng Wong, Basingstoke (GB)
Assigned to SONY GROUP CORPORATION, Tokyo (JP)
Appl. No. 17/797,113
Filed by Sony Group Corporation, Tokyo (JP)
PCT Filed Mar. 24, 2021, PCT No. PCT/EP2021/057546
§ 371(c)(1), (2) Date Aug. 3, 2022,
PCT Pub. No. WO2021/197958, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 20167430 (EP), filed on Mar. 31, 2020.
Prior Publication US 2023/0023422 A1, Jan. 26, 2023
Int. Cl. H04W 52/02 (2009.01); H04W 24/10 (2009.01)
CPC H04W 52/0232 (2013.01) [H04W 24/10 (2013.01); H04W 52/028 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of receiving at a communications device, the method comprising
determining a valid number of search spaces from which a wake-up signal, WUS, can be validly received during a power saving monitoring period, the valid number of search spaces being one or more of a plurality of search spaces of a downlink physical control channel of a wireless access interface provided by a wireless communications network for a wake-up signal to be transmitted, the WUS indicating that a receiver of the communications device should be configured to receive signals in a discontinuous receiving on, DRX_ON, period, and if the number of valid search spaces is less than a minimum number (Nmon) of valid search spaces,
identifying one or more search spaces which are invalid, and
determining that one or more of the invalid search spaces can be regarded as valid, and
monitoring the valid search spaces, and the search spaces which are regarded as valid for the WUS.