US 12,471,173 B2
Method and apparatus for activating cell group without random access procedure in next generation wireless communication system
Donggun Kim, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Oct. 14, 2022, as Appl. No. 18/046,827.
Claims priority of application No. 10-2021-0136936 (KR), filed on Oct. 14, 2021; and application No. 10-2021-0147019 (KR), filed on Oct. 29, 2021.
Prior Publication US 2023/0118008 A1, Apr. 20, 2023
Int. Cl. H04W 76/27 (2018.01); H04W 74/0833 (2024.01); H04W 74/0836 (2024.01); H04W 74/0838 (2024.01)
CPC H04W 76/27 (2018.02) [H04W 74/0833 (2013.01); H04W 74/0836 (2024.01); H04W 74/0838 (2024.01)] 13 Claims
OG exemplary drawing
 
12. A base station in a wireless communication system, the base station comprising:
a transceiver configured to receive or transmit signals; and
a processor configured to:
determine to activate a secondary cell group (SCG), and
control the transceiver to transmit, to a terminal, a first radio resource control (RRC) reconfiguration message for activating the SCG,
wherein, based on a beam failure not being detected and a time alignment timer being running, the SCG is activated without a random access procedure,
wherein the processor is further configured to control the transceiver to transmit, to the terminal, a second RRC reconfiguration message including information indicating that the SCG is deactivated,
wherein, in case that the second RRC reconfiguration message includes information on an identifier (ID) of a first downlink bandwidth part (BWP) to be used for a beam failure detection while the SCG is deactivated, the beam failure detection is performed in the first downlink BWP, and
wherein, in case that the second RRC reconfiguration message does not include the information on the ID of the first downlink BWP, the beam failure detection is performed in a previous activated downlink BWP.