	US 12,206,543 B2
	Transparency window aware sequence selection and transmission procedure for device discovery and range estimation
Alpaslan Demir, East Meadow, NY (US); Tanbir Haque, Jackson Heights, NY (US); Ravikumar Pragada, Warrington, PA (US); Hussain Elkotby, Conshohocken, PA (US); Mahmoud Abdelgelil, San Diego, CA (US); and Patrick Cabrol, Bayshore, NY (US)
Assigned to InterDigital Patent Holdings, Inc, Wilmington, DE (US)
Appl. No. 17/795,773
Filed by InterDigital Patent Holdings, Inc., Wilmington, DE (US)
PCT Filed Jan. 28, 2021, PCT No. PCT/US2021/015443 § 371(c)(1), (2) Date Jul. 27, 2022, PCT Pub. No. WO2021/154960, PCT Pub. Date Aug. 5, 2021.
Claims priority of provisional application 63/051,533, filed on Jul. 14, 2020.
Claims priority of provisional application 62/967,718, filed on Jan. 30, 2020.
Prior Publication US 2023/0093950 A1, Mar. 30, 2023
Int. Cl. H04L 27/06 (2006.01); H04L 27/26 (2006.01)

CPC H04L 27/266 (2013.01) [H04L 27/2659 (2013.01); H04L 27/2695 (2013.01)]

20 Claims

1. A method performed by a wireless transmit/receive unit, WTRU, for initial timing synchronization to communicate with a network, the method comprising:

receiving an in-channel narrowband synchronization sequence from the network to perform initial coarse timing synchronization;

determining coarse timing offset and a range estimation between a beam source of a network transmitter and the WTRU by using the received in-channel narrowband synchronization sequence;

selecting a wideband sequence for a fine timing synchronization using the range estimation, the selected wideband sequence matching a spectral profile of the channel;

transmitting the selected wideband sequence during an uplink timing occasion to the network; and

receiving a verification of the selected wideband sequence from the network.