	US 12,477,466 B2
	Wake-up signal beacon arrangement for wake-up signal coverage detection
Kari Juhani Hooli, Oulu (FI); Knud Knudsen, Aabybro (DK); Jorma Johannes Kaikkonen, Oulu (FI); Mads Lauridsen, Gistrup (DK); Jussi-Pekka Koskinen, Oulu (FI); and Daniela Laselva, Klarup (DK)
Assigned to NOKIA TECHNOLOGIES OY, Espoo (FI)
Filed by NOKIA TECHNOLOGIES OY, Espoo (FI)
Filed on Feb. 21, 2023, as Appl. No. 18/112,413.
Prior Publication US 2024/0284334 A1, Aug. 22, 2024
Int. Cl. H04W 52/02 (2009.01); H04W 24/02 (2009.01)

CPC H04W 52/0235 (2013.01) [H04W 24/02 (2013.01); H04W 52/0216 (2013.01); H04W 52/0219 (2013.01); H04W 52/0229 (2013.01); H04W 52/028 (2013.01)]

1 Claim

1. An apparatus comprising:

at least one processor; and

at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:

receive at least one configuration for a first wake-up signal beacon and a second wake-up signal beacon, wherein a power or energy of the second wake-up signal beacon is lower than a power or energy of the first wake-up signal beacon, and wherein the second wake-up signal beacon and the first wake-up signal beacon are configured with different characteristics comprising periodicity, time-frequency resources, sequence length, difference in transmit power, a type of beam, a power difference adjusted based on time coherence and fading, and a threshold of detection metric for determining a position of the user equipment relative to a coverage edge of the wake-up signal;

monitor a current cell for wake-up signal beacons during a wake-up signal mode using the received at least one configuration;

modify the monitoring of the current cell based on the detection metric,

wherein the detection metric is determined based on at least the second wake-up signal beacon,

wherein the detection metric includes:

a ratio between a detected number of second wake-up signal beacons and an expected number of second wake-up signal beacons in a defined time window,

a number of detected second wake-up signal beacons in a defined time window,

a difference between a number of detected second wake-up signal beacons and first wake-up signal beacons in a defined window,

a number of consecutive successfully detected second wake-up signal beacons, and

a value of a counter that changes based on a number of wake-up signal beacons detected or not detected,

wherein the modifying comprises adjusting a frequency of monitoring for the first wake-up signal beacon or terminating the wake-up signal mode and transitioning to an active mode based on the detection metric,

wherein when the received wake-up signal beacon is the second wake-up signal beacon, the monitoring of the current cell is modified to decrease the frequency of monitoring the current cell for wake-up signal beacons in the wake-up signal mode, and

wherein when the received wake-up signal beacon is not the second wake-up signal beacon, the monitoring of the current cell is modified by:

(i) increasing the frequency of monitoring the current cell for wake-up signal beacons during the wake-up signal mode when the increasing is supported at the apparatus, and

(ii) terminating the monitoring of the current cell and transitioning from the wake-up signal mode to the active mode, while keeping a WUR receiver activated, when the increasing is not supported at the apparatus; and

determine a position of the apparatus relative to a coverage edge of the wake-up signal based on a comparison of the detection metric with the threshold.