US 10,172,162 B2
Method for performing a random access procedure in wireless communication system and a device therefor
Seungjune Yi, Seoul (KR); and Sunyoung Lee, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Jan. 25, 2017, as Appl. No. 15/415,704.
Claims priority of provisional application 62/286,983, filed on Jan. 26, 2016.
Claims priority of provisional application 62/291,533, filed on Feb. 5, 2016.
Prior Publication US 2017/0215207 A1, Jul. 27, 2017
Int. Cl. H04W 74/08 (2009.01); H04L 5/00 (2006.01); H04W 28/20 (2009.01); H04W 72/04 (2009.01); H04W 88/02 (2009.01)
CPC H04W 74/0833 (2013.01) [H04L 5/0005 (2013.01); H04L 5/0053 (2013.01); H04L 5/0092 (2013.01); H04W 28/20 (2013.01); H04W 72/042 (2013.01); H04W 72/0446 (2013.01); H04W 88/02 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for a user equipment (UE) operating in a wireless communication system, the method comprising:
transmitting a random access preamble (RAP) on a physical random access channel (PRACH) resource in a radio frame;
calculating a random access-radio network temporary identifier (RA-RNTI) by considering a time-frequency resource associated with the PRACH resource and an index of a first radio frame of the PRACH resource;
monitoring a physical downlink control channel (PDCCH) identified by the calculated RA-RNTI for a random access response (RAR) reception during a RAR window; and
receiving the RAR in response to the RAP using the PDCCH identified by the calculated RA-RNTI,
wherein the calculating the RA-RNTI includes a modulo operation on the index of the first radio frame of the PRACH resource with a value related to a maximum RAR window size.