Patent ID: 11889446
Assignee: SHARP KABUSHIKI KAISHA
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A method performed by a base station comprising:
generating a random access response including a timing advance command, the timing advance command indicating an index value TA in a form of a timing advance command field of 12 bits, the timing advance command corresponding to a Timing Advanced Group (TAG), the TAG being one of multiple TAGs, (i) the index value TA and (ii) a subcarrier spacing (SCS) configuration μ of the SCS being used by a user equipment to determine a timing advance value NTA based on which the user equipment determines uplink transmission timing for the TAG with the SCS;
transmitting the random access response to the user equipment;
generating a higher-layer parameter initialuplinkBWP based on which the user equipment determines a value N with respect to a minimum subcarrier spacing (SCS) among SCSs of all configured UL BWPs for all uplink carriers in the TAG and for all configured initial UL BWPs each provided by the higher-layer parameter; and
transmitting the higher-layer parameter to the user equipment, wherein
the value N is a maximum timing advance value in milliseconds that is providable by the timing advance command field of 12 bits, and
the adjustment to the uplink transmission timing is applied from a starting point of an uplink slot, the uplink slot being based on (a) an uplink slot in which the timing advance command is received and (b) the value N.