US 12,219,615 B2
Apparatus and method for random access procedure in wireless communication system
Youngbum Kim, Suwon-si (KR); Hosung Kim, Suwon-si (KR); and Taehan Bae, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Appl. No. 17/625,021
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
PCT Filed Jul. 6, 2020, PCT No. PCT/KR2020/008817
§ 371(c)(1), (2) Date Jan. 5, 2022,
PCT Pub. No. WO2021/006588, PCT Pub. Date Jan. 14, 2021.
Claims priority of application No. 10-2019-0081548 (KR), filed on Jul. 5, 2019.
Prior Publication US 2022/0287107 A1, Sep. 8, 2022
Int. Cl. H04W 74/0833 (2024.01); H04W 72/0446 (2023.01); H04W 72/0453 (2023.01); H04W 72/23 (2023.01); H04W 74/00 (2009.01); H04W 74/08 (2009.01)
CPC H04W 74/0841 (2013.01) [H04W 72/0446 (2013.01); H04W 72/0453 (2013.01); H04W 72/23 (2023.01); H04W 74/004 (2013.01); H04W 74/0866 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, configuration information, wherein the configuration information includes information on a supplementary uplink (SUL) threshold value and information on a threshold value for 2-step random access;
identifying whether a reference signal received power (RSRP) of downlink path loss is smaller than the SUL threshold value;
selecting an SUL carrier for performing a random access procedure in case that the RSRP is smaller than the SUL threshold value;
selecting a normal uplink (NUL) carrier for performing the random access procedure in case that the RSRP is larger than or equal to the SUL threshold value; and
after the selecting of the SUL carrier or the NUL carrier,
identifying whether the RSRP is larger than the threshold value for a 2-step random access,
determining a random access type as the 2-step random access in case that the RSRP is larger than the threshold value, and
determining the random access type as a 4-step random access in case that the RSRP is not larger than the threshold value.