US 11,991,753 B2
Method and apparatus for performing random access procedure in wireless communication system
Youngdae Lee, Seoul (KR); Jaehyung Kim, Seoul (KR); and Seunggye Hwang, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Feb. 10, 2023, as Appl. No. 18/108,502.
Application 18/108,502 is a continuation of application No. PCT/KR2022/006770, filed on May 11, 2022.
Claims priority of application No. 10-2021-0060703 (KR), filed on May 11, 2021.
Prior Publication US 2023/0239931 A1, Jul. 27, 2023
Int. Cl. H04W 4/00 (2018.01); H04W 74/0833 (2024.01)
CPC H04W 74/0833 (2013.01) 8 Claims
OG exemplary drawing
 
1. A method performed by a reduced capability (redcap) user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a base station, first configuration information related to random access, wherein the first configuration information includes a first scaling factor for a back-off indicator (BI);
transmitting, to the base station, a first random access preamble;
receiving, from the base station, a random access response (RAR), wherein the RAR includes the BI; and
transmitting, to the base station, a second random access preamble based on the RAR not including a random access preamble identifier (RAPID) associated with the first random access preamble,
wherein based on second configuration information related to random access only for the redcap UE being provided from the base station, the second random access preamble is transmitted after a random backoff time determined based on a value obtained by multiplying the BI by a second scaling factor of the second configuration information, and
wherein based on the second configuration information not being provided from the base station, the second random access preamble is transmitted after a random backoff time determined based on a value obtained by multiplying the BI by the first scaling factor of the first configuration information.