US 12,133,263 B2
Method and apparatus for transmitting a signal in wireless communication system
Qi Xiong, Beijing (CN); Bin Yu, Beijing (CN); Feifei Sun, Beijing (CN); and Yi Wang, Beijing (CN)
Assigned to Samsung Electronics Co., Ltd, (KR)
Appl. No. 17/419,593
Filed by Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
PCT Filed Dec. 30, 2019, PCT No. PCT/KR2019/018709
§ 371(c)(1), (2) Date Jun. 29, 2021,
PCT Pub. No. WO2020/139053, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 201811654158.5 (CN), filed on Dec. 29, 2018; application No. 201910141008.2 (CN), filed on Feb. 25, 2019; and application No. 10-2019-0177330 (KR), filed on Dec. 30, 2019.
Prior Publication US 2022/0116999 A1, Apr. 14, 2022
Int. Cl. H04W 74/0833 (2024.01); H04L 5/00 (2006.01); H04W 74/00 (2009.01)
CPC H04W 74/0833 (2013.01) [H04L 5/0051 (2013.01); H04W 74/006 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
identifying whether a reference signal received power (RSRP) of a reference signal is above a configured threshold for selection between a 2-step random access (RA) and a 4-step RA;
in response to the RSRP being above the configured threshold, setting an RA type to the 2-step RA;
in response to the RSRP not being above the configured threshold, setting the RA type to the 4-step RA; and
transmitting, to a base station, a first message including an RA preamble according to the RA type,
wherein, in response to the RA type being set to the 2-step RA, the method further comprises:
determining two radio network temporary identifiers (RNTIs) used for detecting a second message associated with a random access response (RAR) in response to the first message; and
detecting the second message within an RAR window based on one of the two RNTIs.