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

A user equipment (UE) configured with dual connectivity to a master cell group (MCG) and a secondary cell group (SCG) in a wireless communication network, the UE comprising:

• at least one transceiver;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
• determining a first transmission power for a first transmission that is performed in a first subframe toward the MCG;
• determining a second transmission power for a second transmission toward the SCG;
• and
• based on a total transmission power related to the first transmission power and the second transmission power exceeding a first threshold during a portion of the first subframe in which the first transmission toward the MCG overlaps with the second transmission toward the SCG, controlling the second transmission towards the SCG by:
• performing a scaling-down of the second transmission power by a power reduction value, based on the power reduction value being less than a second threshold.

An apparatus configured to control a user equipment (UE) that is configured with dual connectivity to a master cell group (MCG) and a secondary cell group (SCG) in a wireless communication network, the apparatus comprising:

• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
• determining a first transmission power for a first transmission that is performed in a first subframe toward the MCG;
• determining a second transmission power for a second transmission toward the SCG;
• and
• based on a total transmission power related to the first transmission power and the second transmission power exceeding a first threshold during a portion of the first subframe in which the first transmission toward the MCG overlaps with the second transmission toward the SCG, controlling the second transmission towards the SCG by:
• performing a scaling-down of the second transmission power by a power reduction value, based on the power reduction value being less than a second threshold.