US 12,219,476 B2
Low power wake-up radio beacon signaling
Po-Kai Huang, San Jose, CA (US); Minyoung Park, Portland, OR (US); and Robert Stacey, Portland, OR (US)
Assigned to Intel Corporation, Santa Clara, CA (US)
Appl. No. 16/487,564
Filed by Intel Corporation, Santa Clara, CA (US)
PCT Filed Aug. 29, 2017, PCT No. PCT/US2017/049140
§ 371(c)(1), (2) Date Aug. 21, 2019,
PCT Pub. No. WO2018/156199, PCT Pub. Date Aug. 30, 2018.
Claims priority of provisional application 62/461,583, filed on Feb. 21, 2017.
Prior Publication US 2020/0059861 A1, Feb. 20, 2020
Int. Cl. H04W 52/02 (2009.01); H04W 56/00 (2009.01); H04W 72/0446 (2023.01); H04W 72/23 (2023.01)
CPC H04W 52/0216 (2013.01) [H04W 52/0229 (2013.01); H04W 56/001 (2013.01); H04W 56/0045 (2013.01); H04W 72/0446 (2013.01); H04W 72/23 (2023.01)] 20 Claims
OG exemplary drawing
 
1. An access point device for wake-up radio (WUR) signaling, the access point device comprising memory and processing circuitry configured to:
determine a first time when the access point device is to send a first beacon to a first station device, wherein the first time indicates a beginning of a first beacon interval during which the first station device is in an awake state, the first beacon interval ending when the access point device is to send a second beacon to the first station device;
determine an offset time, based on the first time and the number of time units (TUs) between consecutive target WUR beacon transmission times, when the access point device is to send a first WUR beacon to the first station device, wherein the offset time indicates a beginning of a second beacon interval during which the first station device is in a sleep state that uses WUR transmissions, the second beacon interval ending when the access point device is to send a second WUR beacon to the first station device, wherein the first station device is to enter the sleep state at the offset time;
generate an offset that indicates a time difference between a first target WUR beacon transmission time (TWBTT) and timing synchronization function (TSF) 0, wherein the offset is selected to not equal a positive integer multiple of a main radio target beacon transmission time (TBTT), to prevent overlap of WUR and main radio beacons; and
cause to send, to the first station device, the first WUR beacon, wherein the WUR beacon comprises synchronization information, including timing synchronization function values, that enable the first station device to synchronize its wake-up radio listen schedule.