Balanced PHR timeline (version 2): report PHR on the earliest possible PUSCH, based on a monitoring/search time window defined in terms of the LCP timeline. The PHR cut-off time is the reception time of the corresponding UL DCI/time-reference.
Reporting two/multiple PHRs: The UE reports a PHR for the PUSCH corresponding to the earliest UL DCI after the PHR trigger, but the UE is allowed to additionally report a second PHR for the out-of-order PUSCH that is scheduled later and occurs earlier.
FIG. 5 illustrates a flow diagram 500 of a method in a user equipment for determining the basis of a triggered power head room report. More specifically, the method includes detecting 502 that an event triggering a power headroom report for a first activated serving cell has occurred. A first physical uplink shared channel resource corresponding to a first physical uplink shared channel transmission is identified 504 that comprises an initial transmission of a transport block since the power headroom report was triggered. A determination 506 is made as to whether the first physical uplink shared channel resource corresponds to a configured grant or is in response to uplink grant downlink control information received on a physical downlink control channel since the power headroom report was triggered. Whether the power headroom report is based on an actual transmission or a reference format is determined 508 for each component carrier corresponding to respective downlink control information the user equipment receives until an expiration of a time window measured from the event. The power headroom report is then transmitted 510 on the first physical uplink shared channel transmission.
