Uplink power control in dual connectivity to first or second cell group based on first or second configuration

A user equipment (UE) for performing a power scaling, the UE comprising:

• a reception unit configured with a dual connectivity to a first cell group and a second cell group;
• and
• a processor configured to:
• determine a first power for a first transmission of transmitting a first uplink channel in a first transmission time toward the first cell group;
• determine a second power for a second transmission of transmitting a second uplink channel in a second transmission time toward the second cell group;
• and
• scale down the second power for transmitting the second uplink channel based on that a maximum power is exceeded,
• wherein the first uplink channel includes a first physical random access channel (PRACH),
• wherein the second uplink channel includes a second PRACH,
• wherein the scaling down is performed based on that the first transmission time in which the first uplink channel including the first PRACH is transmitted overlaps the second transmission time in which the second uplink channel including the second PRACH is transmitted, and
• wherein the second transmission is performed based on that the second power is scaled down by a power reduction value which is smaller than a configured value.

A processing apparatus configured to control a user equipment (UE) configured with a dual connectivity to a first cell group and a second cell group, the processing apparatus comprising:

• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
• determining a first power for a first transmission of transmitting a first uplink channel in a first transmission time toward the first cell group;
• determining a second power for a second transmission of transmitting a second uplink channel in a second transmission time toward the second cell group;
• and
• scaling down the second power for transmitting the second uplink channel based on that a maximum power is exceeded,
• wherein the first uplink channel includes a first physical random access channel (PRACH),
• wherein the second uplink channel includes a second PRACH,
• wherein the scaling down is performed based on that the first transmission time in which the first uplink channel including the first PRACH is transmitted overlaps the second transmission time in which the second uplink channel including the second PRACH is transmitted, and
• wherein the second transmission is performed based on that the second power is scaled down by a power reduction value which is smaller than a configured value.