US 12,069,744 B2
Base station apparatus, terminal apparatus, and method for a random access procedure in wireless communication
Wataru Ouchi, Sakai (JP); Tomoki Yoshimura, Sakai (JP); Taewoo Lee, Sakai (JP); Daiichiro Nakashima, Sakai (JP); and Shoichi Suzuki, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP); and FG Innovation Company Limited, Tuen Mun (HK)
Appl. No. 17/598,462
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP); and FG Innovation Company Limited, Tuen Mun (HK)
PCT Filed Mar. 2, 2020, PCT No. PCT/JP2020/008629
§ 371(c)(1), (2) Date Sep. 27, 2021,
PCT Pub. No. WO2020/195571, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-060241 (JP), filed on Mar. 27, 2019.
Prior Publication US 2022/0183079 A1, Jun. 9, 2022
Int. Cl. H04W 74/0833 (2024.01); H04W 72/23 (2023.01); H04W 74/08 (2009.01); H04W 80/02 (2009.01)
CPC H04W 74/0841 (2013.01) [H04W 72/23 (2023.01); H04W 74/0866 (2013.01); H04W 80/02 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A base station apparatus comprising:
a receiver configured to receive a random access preamble; and
a transmitter configured to transmit one or more medium access control (MAC) random access responses (RARs) corresponding to the random access preamble, wherein
the transmitter is further configured to:
set, in a case that a first MAC RAR of the one or more MAC RARs is transmitted in a new radio (NR) access technology cell, a timing advance command (TAC) field included in the first MAC RAR to have a first size and an uplink (UL) grant, including a frequency hopping flag, to have a second size, and
set, in a case that a second MAC RAR of the one or more MAC RARs is transmitted in an NR-unlicensed (NR-U) cell, the TAC field included in the second MAC RAR to have a third size smaller than the first size and the UL grant, without the frequency hopping flag, to have a fourth size greater than the second size.