US 12,010,731 B2
Method and apparatus for handling msga retransmissions during two step random access procedures in wireless communication system
Anil Agiwal, Gyeonggi-do (KR); Jaehyuk Jang, Gyeonggi-do (KR); Soenghun Kim, Gyeonggi-do (KR); and Mangesh Abhimanyu Ingale, Gyeonggi-do (KR)
Assigned to Samsung Electronics Co., Ltd, (KR)
Filed by Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed on Jun. 30, 2023, as Appl. No. 18/345,195.
Application 18/345,195 is a continuation of application No. 17/579,823, filed on Jan. 20, 2022, granted, now 11,696,340.
Application 17/579,823 is a continuation of application No. 16/790,313, filed on Feb. 13, 2020, granted, now 11,240,850, issued on Feb. 1, 2022.
Claims priority of provisional application 62/805,058, filed on Feb. 13, 2019.
Claims priority of application No. 201931009602 (IN), filed on Mar. 12, 2019.
Prior Publication US 2023/0354439 A1, Nov. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/0833 (2024.01); H04W 28/02 (2009.01); H04W 72/0446 (2023.01); H04W 72/23 (2023.01); H04W 74/00 (2009.01)
CPC H04W 74/0833 (2013.01) [H04W 28/0278 (2013.01); H04W 72/0446 (2013.01); H04W 72/23 (2023.01); H04W 74/004 (2013.01); H04W 74/006 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method performed by a terminal in a wireless communication system, the method comprising:
storing a medium access control (MAC) protocol data unit (PDU) for a message (MSG) A in a buffer;
transmitting, to a base station, a preamble for the MSG A on a physical random access channel (PRACH);
transmitting, to the base station, the MAC PDU for the MSG A on a physical uplink shared channel (PUSCH);
receiving, from the base station, a MSG B including an uplink grant;
identifying a random access procedure is successfully completed, in case that the preamble is associated with a contention free random access; and
transmitting, to the base station, the MAC PDU obtained from the buffer based on the uplink grant,
wherein the MSG B is received by monitoring a window starting at a first physical downlink control channel (PDCCH) occasion, which is at least one symbol after an end of the PUSCH.