US 12,082,257 B2
Method and apparatus for performing a random access procedure in wireless communication system
Suckchel Yang, Seoul (KR); Seonwook Kim, Seoul (KR); Changhwan Park, Seoul (KR); Joonkui Ahn, Seoul (KR); and Sukhyon Yoon, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 17/267,448
Filed by LG Electronics Inc., Seoul (KR)
PCT Filed Aug. 9, 2019, PCT No. PCT/KR2019/010161
§ 371(c)(1), (2) Date Feb. 9, 2021,
PCT Pub. No. WO2020/032742, PCT Pub. Date Feb. 13, 2020.
Claims priority of provisional application 62/716,952, filed on Aug. 9, 2018.
Claims priority of application No. 10-2018-0115387 (KR), filed on Sep. 27, 2018.
Prior Publication US 2021/0329703 A1, Oct. 21, 2021
Int. Cl. H04W 74/0833 (2024.01); H04B 17/318 (2015.01); H04L 5/00 (2006.01); H04W 24/08 (2009.01); H04W 72/04 (2023.01)
CPC H04W 74/0833 (2013.01) [H04B 17/318 (2015.01); H04L 5/0048 (2013.01); H04W 24/08 (2013.01); H04W 72/04 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for performing a random access (RA) procedure by a user equipment (UE) in a wireless communication system, the method comprising:
receiving a downlink reference signal in a downlink bandwidth part (DL BWP);
performing a measurement based on the received downlink reference signal;
based on the measurement, performing a 2-step RA procedure in an uplink (UL) BWP;
based on the 2-step RA procedure being initiated, transmitting a message A (msgA) including both a RA preamble and a physical uplink shared channel (PUSCH), wherein a cell-radio network temporary identifier (C-RNTI) is included in the msgA;
receiving a physical downlink control channel (PDCCH) for scheduling a physical downlink shared channel (PDSCH); and
receiving the PDSCH based on the PDCCH,
wherein, based on the PDCCH for the C-RNTI and based on the PDSCH including a timing advanced (TA) command, the UE considers the RA procedure as successfully completed.