US 12,232,180 B2
Apparatus and method for performing random access in wireless communication system
Dong Hyun Park, Seoul (KR); Ki Bum Kwon, Seoul (KR); and Hyo Sun Yang, Seoul (KR)
Assigned to Innovative Technology Lab Co., Ltd., Seoul (KR)
Filed by Innovative Technology Lab Co., Ltd., Seoul (KR)
Filed on Jul. 28, 2022, as Appl. No. 17/875,408.
Application 17/875,408 is a continuation of application No. 17/148,540, filed on Jan. 13, 2021, granted, now 11,432,341.
Application 17/148,540 is a continuation of application No. 16/246,717, filed on Jan. 14, 2019, granted, now 10,925,095, issued on Feb. 16, 2021.
Claims priority of application No. 10-2018-0004649 (KR), filed on Jan. 12, 2018; and application No. 10-2018-0040521 (KR), filed on Apr. 6, 2018.
Prior Publication US 2022/0369381 A1, Nov. 17, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/0838 (2024.01); H04W 74/00 (2009.01); H04W 74/0833 (2024.01)
CPC H04W 74/0833 (2013.01) [H04W 74/006 (2013.01)] 42 Claims
OG exemplary drawing
 
1. A wireless device comprising:
a wireless transceiver;
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
transmit, to a base station, a first random access preamble;
receive, during a time window, a first random access response, wherein the time window is based on a transmission time point associated with the first random access preamble; and
transmit, after receiving the first random access response, a second random access preamble, wherein a preparation time for transmitting the second random access preamble is set based on one of:
a first subcarrier spacing associated with the first random access preamble; or
a second subcarrier spacing associated with the first random access response.