US 12,471,175 B2
User equipment, base station, and method for random access procedure on a primary serving cell based on a secondary cell group state
Chongming Zhang, Shanghai (CN); and Renmao Liu, Shanghai (CN)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 18/266,304
Filed by Sharp Kabushiki Kaisha, Sakai (JP)
PCT Filed Dec. 14, 2021, PCT No. PCT/CN2021/137853
§ 371(c)(1), (2) Date Jun. 9, 2023,
PCT Pub. No. WO2022/127778, PCT Pub. Date Jun. 23, 2022.
Claims priority of application No. 202011479894.9 (CN), filed on Dec. 15, 2020.
Prior Publication US 2024/0032136 A1, Jan. 25, 2024
Int. Cl. H04W 76/27 (2018.01); H04W 36/00 (2009.01); H04W 74/0833 (2024.01)
CPC H04W 76/27 (2018.02) [H04W 36/0069 (2018.08); H04W 74/0833 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A user equipment (UE), comprising:
a processor; and
a memory in electronic communication with the processor, wherein instructions stored in the memory are executable to:
receive a Radio Resource Control (RRC) reconfiguration message which includes a special cell (SPcell) configuration for a secondary cell group (SCG) and a synchronization indication (reconfigurationWithSync); and
perform a process upon receiving the RRC reconfiguration message which includes the SPcell configuration for the SCG and the reconfigurationWithSync, wherein,
in a case that a state of the SCG is not indicated in the received RRC reconfiguration message, the UE considers the SCG as activated, starts a timer, and initiates a random access procedure on a primary serving cell (PSCell), and
in a case that the state of the SCG is indicated as deactivated in the received RRC reconfiguration message, the UE completes the process without starting the timer and performing the random access procedure on the PSCell.