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

Claim 0:
1. A method of operating a wireless device, comprising:, by the wireless device:
establishing communication with a first base station of a cellular network, wherein the first base station is comprised in a master cell group (MCG);
establishing communication a second base station, wherein the second base station is comprised in a secondary cell group (SCG), wherein said establishing communication with the second base station comprises maintaining one or more timing advance (TA) parameters for performing uplink communication with the second base station;
receiving an indication to deactivate the SCG;
in response to the indication to deactivate the SCG, storing the one or more TA parameters;
performing a plurality of signal quality measurements of the second base station;
receiving an indication to activate the SCG;
comparing one or more 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 the stored one or more TA parameters or to obtain a new one or more TA parameters; and
communicating with the second base station based on said determining, wherein said communicating with the second base station uses the stored one or more TA parameters or the new one or more TA parameters.