US 12,004,233 B2
Method and apparatus for random access in NTN
Kyeongin Jeong, Allen, TX (US); and Nishithkumar D. Tripathi, Parker, TX (US)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Oct. 13, 2021, as Appl. No. 17/500,839.
Claims priority of provisional application 63/092,915, filed on Oct. 16, 2020.
Prior Publication US 2022/0124834 A1, Apr. 21, 2022
Int. Cl. H04W 74/0833 (2024.01); H04W 28/02 (2009.01); H04W 56/00 (2009.01); H04W 72/02 (2009.01); H04W 72/51 (2023.01); H04W 74/08 (2009.01); H04W 80/02 (2009.01)
CPC H04W 74/0841 (2013.01) [H04W 28/0226 (2013.01); H04W 56/005 (2013.01); H04W 72/02 (2013.01); H04W 72/51 (2023.01); H04W 74/0866 (2013.01); H04W 80/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A user equipment (UE) in a wireless communication system, the UE comprising:
a processor configured to:
identify configuration information including a first set of resources and a second set of resources for a random access channel (RACH) operation,
determine whether current location information of the UE is valid for the RACH operation,
select the first set of resources based on a determination that the current location information of the UE is valid, and
select the second set of resources based on a determination that the current location information of the UE is invalid; and
a transceiver operably coupled to the processor, the transceiver configured to:
transmit a RACH preamble on the selected first or second set of resources, and
receive, in response to transmission of the RACH preamble, a random access response (RAR) medium access control protocol data unit (MAC PDU) (RAR MAC PDU),
wherein the RAR MAC PDU includes a MAC subPDU comprising a first format of MAC subPDU associated with the first set of resources and a second format of MAC subPDU associated with the second set of resources.