Power headroom reporting for multi-beam uplink transmissions
The present application relates to devices and components including apparatus, systems, and methods for providing a power headroom report with respect to repetitions of uplink data transmissions with different beams in wireless communication systems.
1. A method comprising:
processing scheduling information, received from a base station, to schedule a plurality of repetitions of an uplink data transmission over a first component carrier (CC);
detecting, by a user equipment (UE), a power headroom report (PHR) trigger condition;
calculating, based on the detecting, a first power headroom value for a first actual repetition of the plurality of repetitions;
calculating a second power headroom value for a second actual repetition of the plurality of repetitions, wherein calculating the second power headroom value is based on:
an assumption of no uplink data transmission by the UE over a second CC during the second actual repetition, or
an assumption that an uplink data transmission status of the UE over a second CC during the second actual repetition is equivalent to an uplink data transmission status of the UE over the second CC during the first actual repetition; and
generating a report, for transmission to the base station, including a first PHR based on the first power headroom value and a second PHR based on the second power headroom value.
2. The method of claim 1 , wherein the first actual repetition is an actual physical uplink shared channel (PUSCH) transmission.
3. The method of claim 1 , wherein calculating the second power headroom value is based on a length of a gap between the first actual repetition and the second actual repetition or is based on a length of a gap between a time of detecting the PHR trigger condition and the second actual repetition.
4. The method of claim 1 , wherein calculating the second power headroom value is based on a relation between a threshold and a length of a gap between a time of detecting the PHR trigger condition and the second actual repetition, and
wherein the method further comprises:
generating an indication of a capability of the UE, to be transmitted to the base station, wherein the capability includes the threshold.
5. The method of claim 1 , wherein detecting the PHR trigger condition comprises:
detecting that a pathloss change exceeds a threshold.
6. One or more non-transitory computer-readable media having instructions that, when executed, cause processing circuitry to:
obtain, by a user equipment (UE), scheduling information to schedule a plurality of repetitions of an uplink data transmission over a first component carrier (CC);
calculate a first power headroom value, based on configuration information for a first actual repetition of the plurality of repetitions;
calculate a second power headroom value for a second actual repetition of the plurality of repetitions, wherein calculating the second power headroom value is based on:
an assumption of no uplink data transmission by the UE over a second CC during the second actual repetition, or
an assumption that an uplink data transmission status of the UE over a second CC during the second actual repetition is equivalent to an uplink data transmission status of the UE over the second CC during the first actual repetition; and
generate, for transmission to a base station, a report including a first power headroom report (PHR) based on the first power headroom value and a second PHR based on the second power headroom value.
7. The one or more non-transitory computer-readable media of claim 6 , wherein the instructions, when executed, further cause the processing circuitry to generate a message indicating a capability of the UE to send the second PHR.
8. The one or more non-transitory computer-readable media of claim 6 , wherein the instructions, when executed, further cause the processing circuitry to obtain:
first configuration information for a PHR trigger condition for a first beam; and
second configuration information for a PHR trigger condition for a second beam.
9. An apparatus comprising:
processing circuitry to:
process scheduling information, received from a base station, to schedule a plurality of repetitions of an uplink data transmission over a first component carrier (CC);
detect a power headroom report (PHR) trigger condition;
calculate, based on the detecting, a first power headroom value for a first actual repetition of the plurality of repetitions;
calculate a second power headroom value for a second actual repetition of the plurality of repetitions, wherein calculating the second power headroom value is based on:
an assumption of no uplink data transmission by a user equipment (UE) over a second CC during the second actual repetition, or
an assumption that an uplink data transmission status of the UE over a second CC during the second actual repetition is equivalent to an uplink data transmission status of the UE over the second CC during the first actual repetition; and
generate, for transmission to the base station, a first PHR based on the first power headroom value and a second PHR based on the second power headroom value; and
memory interface circuitry, coupled with the processing circuitry, to store the scheduling information in memory.
10. The apparatus of claim 9 , wherein the first actual repetition is an actual physical uplink shared channel (PUSCH) transmission.
11. The apparatus of claim 9 , wherein calculating the second power headroom value is based on a length of a gap between the first actual repetition and the second actual repetition or is based on a length of a gap between a time of detecting the PHR trigger condition and the second actual repetition.
12. The apparatus of claim 9 , wherein calculating the second power headroom value is based on a relation between a threshold and a length of a gap between a time of detecting the PHR trigger condition and the second actual repetition, and
wherein the processing circuitry is further to:
generate an indication of a capability of the UE, to be transmitted to the base station, wherein the capability includes the threshold.
13. The apparatus of claim 9 , wherein to detect the PHR trigger condition, the processing circuitry is further to:
detect that a pathloss change exceeds a threshold.