US 12,445,988 B2
MAC-CE command action timing control in non-terrestrial networks
Chien-Chun Cheng, Taipei (TW); and Chia-Hao Yu, Taipei (TW)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
Filed on Oct. 15, 2021, as Appl. No. 17/502,693.
Claims priority of provisional application 63/092,361, filed on Oct. 15, 2020.
Prior Publication US 2022/0124660 A1, Apr. 21, 2022
Int. Cl. H04W 56/00 (2009.01); H04W 72/0446 (2023.01); H04W 72/23 (2023.01); H04W 80/02 (2009.01); H04W 84/06 (2009.01)
CPC H04W 56/0045 (2013.01) [H04W 72/0446 (2013.01); H04W 72/23 (2023.01); H04W 80/02 (2013.01); H04W 84/06 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for a user equipment (UE) connected to a non-terrestrial network (NTN), the method comprising:
receiving, from a base station (BS) of the NTN, at a downlink (DL) slot associated with an uplink (UL) slot n, a physical downlink shared channel (PDSCH) carrying a timing advance (TA) command medium access control (MAC) control element (CE);
receiving, from the BS, a value for Koffset via system information (SI);
adjusting a timing of uplink (UL) transmissions to the BS according to the received TA command MAC CE; and
applying, from a beginning of the UL slot n+k+1+Koffset, the adjusted timing to adjust a TA value for subsequent UL transmissions, wherein:
Koffset is a common delay broadcast by the BS to a plurality of UEs connected to the NTN including the UE,
k is an additional delay specific to the UE, and
a duration of the additional delay is based on a processing latency of the UE.