US 12,279,313 B2
Method and apparatus for transmitting and receiving wireless signal in wireless communication system
Joonkui Ahn, Seoul (KR); Youngdae Lee, Seoul (KR); Sukhyon Yoon, Seoul (KR); Jaehyung Kim, Seoul (KR); and Suckchel Yang, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/775,761
Filed by LG Electronics Inc., Seoul (KR)
PCT Filed Nov. 12, 2020, PCT No. PCT/KR2020/015891
§ 371(c)(1), (2) Date May 10, 2022,
PCT Pub. No. WO2021/096249, PCT Pub. Date May 20, 2021.
Claims priority of application No. 10-2019-0144475 (KR), filed on Nov. 12, 2019.
Prior Publication US 2022/0394777 A1, Dec. 8, 2022
Int. Cl. H04W 74/0833 (2024.01); H04L 5/00 (2006.01)
CPC H04W 74/0833 (2013.01) [H04L 5/0055 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method performed by a user equipment in a wireless communication system, the method comprising:
receiving configuration information related to a 2-step Random Access Channel (RACH) procedure;
transmitting a Message A (MsgA) to a base station as a part of the 2-step RACH procedure, the MsgA including a Physical Random Access Channel (PRACH) and a first Physical Uplink Shared Channel (PUSCH),
wherein the PRACH is transmitted in a RACH occasion (RO), and the first PUSCH is transmitted in a PUSCH occasion (PO);
based on that the first PUSCH is accompanied by a Small Data Transmission (SDT) transmission and that the SDT transmission is a part of SDT data, additionally transmitting the rest of the SDT data to the base station through one or more second PUSCHs in a state that there is no Radio Resource Control (RRC) connection to the base station, wherein each PUSCH of the first PUSCH and the one or more second PUSCHs includes information of time and frequency resource allocation of a next second PUSCH; and
based on that the first PUSCH is not accompanied by the SDT transmission, performing a procedure for the RRC connection to the base station through the 2-step RACH procedure including reception of a Message B (MsgB) from the base station including a contention resolution message.