Uplink channel transmission in dual connectivity
Technology for dual connectivity is disclosed. A user equipment (UE) can identify a first physical channel that includes a first uplink control information (UCI) and a second physical channel that includes a second UCI. The UE can select a priority level for the first physical channel and a priority level for the second physical channel. The UE can apply power scaling to a first physical channel transmission or a second physical channel transmission if a total transmit power of the UE would exceed a specific value during a period of time. The UE can scale a transmit power for the second physical channel if the priority level for the first physical channel is higher than the priority level for the second physical channel depending on a type of first UCI and a type of second UCI.
1. An apparatus of a user equipment (UE) configured for dual connectivity, the apparatus configured to:
process, using one or more processors and memory, a first physical channel transmission that includes a first uplink control information (UCI);
process, using the one or more processors and memory, a second physical channel transmission that includes a second UCI; and
apply, using the one or more processors and memory, power scaling to the first physical channel transmission or the second physical channel transmission when a total transmit power of the first physical channel transmission and the second physical channel transmission from the UE exceeds a maximum transmit power (PCMAX) during a period of time, wherein:
the UE is configured to scale a transmit power for the first physical channel transmission when the first UCI does not include a hybrid automatic repeat request acknowledgement (HARQ-ACK) or scheduling request (SR) and the second UCI includes a HARQ-ACK or SR; or
the UE is configured to scale a transmit power for the second physical channel transmission when the first UCI includes a hybrid automatic repeat request acknowledgement (HARQ-ACK) or scheduling request (SR) and the second UCI does not include a HARQ-ACK or SR.
2. The apparatus of claim 1 , further configured to perform the first physical channel transmission in an uplink using a first physical channel for a serving cell belonging to a Master Cell Group (MCG).
3. The apparatus of claim 1 , further configured to perform the second physical channel transmission in an uplink using a second physical channel for a serving cell belonging to a Secondary Cell Group (SCG).
4. The apparatus of claim 1 , wherein the UE is configured to:
scale a transmit power for the first physical channel transmission when
the first UCI and the second UCI both include a hybrid automatic repeat request-acknowledgement (HARQ-ACK), and the first physical channel transmission is for a Secondary Cell Group (SCG) and the second physical channel transmission is for a Master Cell Group (MCG); or
scale a transmit power for the first physical channel transmission when the first UCI and the second UCI both include a scheduling request (SR), and the first physical channel transmission is for a Secondary Cell Group (SCG) and the second physical channel transmission is for a Master Cell Group (MCG).
5. The apparatus of claim 1 , wherein:
the UE is configured to scale a transmit power for the first physical channel transmission when
the first UCI includes a SR and the second UCI includes a HARQ-ACK; or
the UE is configured to scale a transmit power for the second physical channel transmission when the first UCI includes a HARQ-ACK and the second UCI includes a SR.
6. The apparatus of claim 1 , wherein the total transmit power of the first physical channel transmission and the second physical channel transmission from the UE does not exceed the PCMAX on an overlapping time period.
7. The apparatus of claim 1 , wherein:
the first physical channel transmission is performed on a first Physical Uplink Control Channel (PUCCH) or a first Physical Uplink Shared Channel (PUSCH); and
the second physical channel transmission is performed on a second PUCCH or a second PUSCH.
8. The apparatus of claim 1 , wherein the UE includes an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, an internal memory, or a non-volatile memory port.