US 12,219,483 B2
Use of wake-up receiver with Bluetooth low energy
Leif Wilhelmsson, Lund (SE); Henrik Sjöland, Lund (SE); Thomas Rimhagen, Linköping (SE); Piergiuseppe Di Marco, Teramo (IT); and Magnus Olsson, Klagshamn (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/441,892
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Sep. 23, 2019, PCT No. PCT/EP2019/075455
§ 371(c)(1), (2) Date Sep. 22, 2021,
PCT Pub. No. WO2020/192949, PCT Pub. Date Oct. 1, 2020.
Claims priority of provisional application 62/824,745, filed on Mar. 27, 2019.
Prior Publication US 2022/0201610 A1, Jun. 23, 2022
Int. Cl. H04W 52/02 (2009.01); H04W 4/23 (2018.01); H04W 76/10 (2018.01)
CPC H04W 52/0229 (2013.01) [H04W 4/23 (2018.02); H04W 76/10 (2018.02)] 14 Claims
OG exemplary drawing
 
1. A method of transmitting a wake-up signal from a first node in a wireless network to a second node in said wireless network, said method comprising:
determining, by said first node, that there is an uncertainty concerning a frequency at which a wake-up receiver of said second node is to receive a wake-up signal, wherein the uncertainty is attributable to frequency drift of the wake-up receiver of said second node;
selecting, by said first node, a bandwidth for transmitting said wake-up signal based on said determined uncertainty, wherein said selecting comprises selecting a bandwidth with a width that accounts for the frequency drift of the wake-up receiver; and
transmitting, by said first node, said wake-up signal at said selected bandwidth.