US 12,294,964 B2
Managing uplink transmission with multiple timing advance groups
Ankit Bhamri, Bad Nauheim (DE); Dawei Zhang, Saratoga, CA (US); Sigen Ye, San Diego, CA (US); Wei Zeng, Saratoga, CA (US); and Yang Tang, San Jose, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jul. 20, 2022, as Appl. No. 17/813,792.
Prior Publication US 2024/0031962 A1, Jan. 25, 2024
Int. Cl. H04W 56/00 (2009.01)
CPC H04W 56/0045 (2013.01) [H04W 56/0005 (2013.01)] 20 Claims
OG exemplary drawing
 
10. An apparatus configurable for operation in a wireless device, the apparatus comprising one or more processors coupled to a memory storing instructions that, when executed by the one or more processors, configure the wireless device to:
select a first set of N≥2 uplink (UL) radio frequency carriers for aggregated UL transmissions from M>N available radio frequency carriers,
wherein:
the M available radio frequency carriers are divided into distinct timing advance groups (TAGs), each TAG having a distinct timing advance value, and
the N radio frequency carriers selected for aggregated UL transmissions belong to a single TAG;
transmit the aggregated UL transmissions via the first set of N UL radio frequency carriers;
select, from the M available radio frequency carriers, a second set of N UL radio frequency carriers belonging to a second TAG;
determine a quiescent time period based on an UL transmit carrier switching gap time period and on a timing advance value for the second TAG; and
switch UL transmission from the first set of N UL radio frequency carriers to the second set of N UL radio frequency carriers after the quiescent time period.