Patent ID: 11943722
Assignee: APPLE INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. An apparatus, comprising:, at least one processor, configured to cause a wireless device to:
establish communication with a first base station of a cellular network, wherein the first base station is comprised in a master cell group (MCG);
establish communication a second base station, wherein the second base station is comprised in a secondary cell group (SCG);
maintain one or more timing advance (TA) parameters for performing uplink communication with the second base station;
receive an indication to deactivate the SCG;
perform a plurality of signal quality measurements of the second base station while the SCG is deactivated;
receiving an indication to activate the SCG;
in response to receiving an indication to activate the SCG, compare a moving average of the plurality of signal quality measurements of the second base station to one or more signal quality thresholds;
based on said comparing, determining whether to use previously stored one or more TA parameters or to obtain a new one or more TA parameters; and
communicate with the second base station based on said determining, wherein said communicating with the second base station uses the previously stored one or more TA parameters or the new one or more TA parameters.