US 11,991,754 B2
Method for grant free uplink transmission, user equipment and base station device
Qi Xiong, Beijing (CN); Bin Yu, Beijing (CN); and Chen Qian, Beijing (CN)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Mar. 16, 2023, as Appl. No. 18/185,054.
Application 18/185,054 is a continuation of application No. 17/052,959, granted, now 11,611,996, previously published as PCT/KR2019/005119, filed on Apr. 29, 2019.
Claims priority of application No. 201810444554.9 (CN), filed on May 10, 2018; application No. 201810481214.3 (CN), filed on May 18, 2018; and application No. 201811642884.5 (CN), filed on Dec. 29, 2018.
Prior Publication US 2023/0217504 A1, Jul. 6, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/0833 (2024.01); H04W 56/00 (2009.01); H04W 74/00 (2009.01); H04W 74/08 (2009.01)
CPC H04W 74/0833 (2013.01) [H04W 56/001 (2013.01); H04W 74/004 (2013.01); H04W 74/006 (2013.01); H04W 74/0891 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method performed by a terminal for a 2-step random access procedure in a wireless communication, the method comprising:
identifying whether physical random access channel (PRACH) occasions for a 4-step random access type is shared with a 2-step random access type; and
based on identifying that the PRACH occasions for the 4-step random access type is shared with the 2-step random access type, transmitting, to a base station, a message A including a preamble based on a first configuration of PRACH occasions,
wherein the first configuration of PRACH occasions is common for the 4-step random access type and the 2-step random access type, and
wherein, based on identifying that the PRACH occasions for the 4-step random access type is shared with the 2-step random access type, a preamble index of the preamble associated with a synchronization signal block (SSB) starts from an index which is determined based on a starting preamble index of preambles allocated for the 4-step random access type associated with the SSB and a total number of preambles for the 4-step random access type.