TECHNIQUES FOR DETERMINING BEAM METRICS FOR MAXIMUM PERMISSIBLE EXPOSURE REPORTING

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine one or more beam metric values for one or more beams that are monitored by the UE, wherein the one or more beam metric values correspond to one or more of a beam power management maximum power reduction (P-MPR) metric, a beam uplink reference signal receive power (RSRP) metric, or a beam virtual power headroom metric; and transmit a report based at least in part on the one or more beam metric values. Numerous other aspects are provided.

FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for techniques for determining beam metrics for maximum permissible exposure reporting.

DESCRIPTION OF RELATED ART

SUMMARY

In some aspects, a method of wireless communication, performed by a UE, may include determining one or more beam metric values for one or more beams that are monitored by the UE, wherein the one or more beam metric values correspond to one or more of a beam power management maximum power reduction (P-MPR) metric, a beam uplink reference signal receive power (RSRP) metric, or a beam virtual power headroom metric, and transmitting a report based at least in part on the one or more beam metric values.

In some aspects, the one or more beam metric values correspond to the uplink RSRP metric and the uplink RSRP metric is based at least in part on a beam P-MPR metric.

In some aspects, the one or more beam metric values correspond to the beam virtual power headroom metric, and the beam virtual power headroom metric is based at least in part on a beam P-MPR metric.

In some aspects, the method includes calculating a value for the beam virtual power headroom metric for a beam, of the one or more beams, based at least in part on an uplink resource, or an uplink resource configuration, associated with the beam.

In some aspects, the beam virtual power headroom metric for a beam is based at least in part on a difference between a maximum power available for a transmission via an uplink resource, or an uplink resource configuration, associated with the beam, and a current transmission power setting for a transmission via the uplink resource associated with the beam.

In some aspects, the maximum power available for the transmission via the uplink resource is based at least in part on a beam P-MPR metric for the beam.

In some aspects, the current transmission power setting for the transmission via the uplink resource associated with the beam is based at least in part on a set of power control parameters including one or more of pathloss, P0, alpha, or a reference target power.

In some aspects, the uplink resource comprises a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), or a sounding reference signal (SRS).

In some aspects, the uplink resource configuration includes one or more of information relating to a pathloss reference signal, information relating to a power control loop, p0, alpha, or information relating to the beam.

In some aspects, the UE transmits the report in one or more of a medium access control control element (MAC-CE) message, or an uplink beam report.

In some aspects, the report comprises at least one beam identification associated with the one or more beam metric values.

In some aspects, a beam identification of the at least one beam identification includes an uplink beam identification, a spatial reference signal identification, or an uplink resource identifier.

In some aspects, the report includes an uplink beam identification, a spatial reference signal identification, or an uplink resource identifier.

In some aspects, the report includes one or more of an indication of an uplink resource associated with a current beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the current beam.

In some aspects, the at least one beam metric value for the uplink resource associated with the current beam comprises a value for the beam virtual power headroom metric.

In some aspects, the report includes an indication of an uplink resource associated with a candidate beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the candidate beam.

In some aspects, the report comprises an indication of metric types, associated with the at least one beam metric value for the uplink resource associated with the candidate beam, that are included in the report.

In some aspects, the at least one beam metric value for the uplink resource associated with the candidate beam comprises a value for the beam virtual power headroom metric.

In some aspects, the report includes an indication of an uplink resource associated with an additional current beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the additional current beam.

In some aspects, the report includes an indication of an uplink resource associated with an additional candidate beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the additional candidate beam.

In some aspects, the at least one beam metric value for the uplink resource associated with the current beam includes a value for the beam P-MPR metric, a value of a maximum power available for a transmission via the uplink resource associated with the current beam, and one or more of a value for the beam virtual power headroom metric, or a value for the uplink RSRP metric.

In some aspects, the report includes a value for the beam P-MPR metric, a value of a maximum power available for a transmission via the uplink resource associated with the current beam, and one or more of a value for the beam virtual power headroom metric, or a value for the uplink RSRP metric.

In some aspects, the report includes one or more of an indication of an uplink resource associated with a candidate beam of the one or more beams, and one or more beam metric values, of the one or more beam metric values, for the uplink resource associated with the candidate beam.

In some aspects, the at least one beam metric value for the uplink resource associated with the candidate beam includes a value for the beam virtual power headroom metric.

In some aspects, a method of wireless communication, performed by a UE, may include identifying a maximum permissible exposure (MPE) event for a current beam based at least in part on one or more beam metric values for the current beam, wherein the one or more beam metric values correspond to one or more of a P-MPR metric, an uplink RSRP metric, or a virtual power headroom metric, and transmitting a report based at least in part on the identification of the MPE event.

In some aspects, the UE is configured with a first set of uplink resources associated with one or more current beams including the current beam and the UE is configured with one or more of a second set of uplink resources for candidate beams, or a third set of uplink resources for reporting beam metrics.

In some aspects, the first set of uplink resources, the second set of uplink resources, and the third set of uplink resources include one or more of an SRS, a PUCCH, a PUSCH, or a radio resource control (RRC) configuration.

In some aspects, the method includes identifying the MPE event for the current beam based at least in part on at least one beam metric value, of the one or more beam metric values, associated with the first set of uplink resources.

In some aspects, the method includes identifying, based at least in part on one or more beam metric values of the second set of uplink resources, a replacement beam for the current beam.

In some aspects, the method includes determining to beam switch from the current beam to the replacement beam based at least in part on the one or more beam metric values for the current beam and one or more beam metric values of the replacement beam.

In some aspects, the one or more beam metric values of the current beam and the one or more beam metric values of the replacement beam are based at least in part on multiple measurements of one or more beam metrics.

In some aspects, the determination to beam switch from the current beam to the replacement beam is based at least in part on the one or more beam metric values of the current beam failing to satisfy a first threshold, and the one or more beam metric values of the replacement beam satisfying a second threshold.

In some aspects, the determination to beam switch from the current beam to the replacement beam is based at least in part on a difference between the one or more beam metric values of the replacement beam and the one or more beam metric values of the current beam satisfying a threshold.

In some aspects, the method includes beam switch from the current beam to the replacement beam.

In some aspects, the report based at least in part on the identification of the MPE event identifies one or more of the current beam, the replacement beam, the one or more beam metric values for the current beam, or the one or more beam metric values of the replacement beam.

In some aspects, a UE for wireless communication may include memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to determine one or more beam metric values for one or more beams that are monitored by the UE, wherein the one or more beam metric values correspond to one or more of a beam P-MPR metric, a beam uplink RSRP metric, or a beam virtual power headroom metric, and transmit a report based at least in part on the one or more beam metric values.

In some aspects, the one or more beam metric values correspond to the uplink RSRP metric and the uplink RSRP metric is based at least in part on a beam P-MPR metric.

In some aspects, the one or more beam metric values correspond to the beam virtual power headroom metric and the beam virtual power headroom metric is based at least in part on a beam P-MPR metric.

In some aspects, the method includes calculating a value for the beam virtual power headroom metric for a beam, of the one or more beams, based at least in part on an uplink resource, or an uplink resource configuration, associated with the beam.

In some aspects, the beam virtual power headroom metric for a beam is based at least in part on a difference between a maximum power available for a transmission via an uplink resource, or an uplink resource configuration, associated with the beam and a current transmission power setting for a transmission via the uplink resource associated with the beam.

In some aspects, the maximum power available for the transmission via the uplink resource is based at least in part on a beam P-MPR metric for the beam.

In some aspects, the current transmission power setting for the transmission via the uplink resource associated with the beam is based at least in part on a set of power control parameters including one or more of pathloss, P0, alpha, or a reference target power.

In some aspects, the uplink resource comprises a PUCCH, a PUSCH, or an SRS.

In some aspects, the uplink resource configuration includes one or more of information relating to a pathloss reference signal, information relating to a power control loop, p0, alpha, or information relating to the beam.

In some aspects, the UE transmits the report in one or more of a MAC-CE message, or an uplink beam report.

In some aspects, the report comprises at least one beam identification associated with the one or more beam metric values.

In some aspects, a beam identification of the at least one beam identification includes an uplink beam identification, a spatial reference signal identification, or an uplink resource identifier.

In some aspects, the report includes an uplink beam identification, a spatial reference signal identification, or an uplink resource identifier.

In some aspects, the report includes one or more of an indication of an uplink resource associated with a current beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the current beam.

In some aspects, the at least one beam metric value for the uplink resource associated with the current beam comprises a value for the beam virtual power headroom metric.

In some aspects, the report includes an indication of an uplink resource associated with a candidate beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the candidate beam.

In some aspects, the report comprises an indication of metric types, associated with the at least one beam metric value for the uplink resource associated with the candidate beam, that are included in the report.

In some aspects, the at least one beam metric value for the uplink resource associated with the candidate beam comprises a value for the beam virtual power headroom metric.

In some aspects, the report includes an indication of an uplink resource associated with an additional current beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the additional current beam.

In some aspects, the report includes an indication of an uplink resource associated with an additional candidate beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the additional candidate beam.

In some aspects, the at least one beam metric value for the uplink resource associated with the current beam includes a value for the beam P-MPR metric, a value of a maximum power available for a transmission via the uplink resource associated with the current beam, and one or more of a value for the beam virtual power headroom metric, or a value for the uplink RSRP metric.

In some aspects, the report includes a value for the beam P-MPR metric, a value of a maximum power available for a transmission via the uplink resource associated with the current beam, and one or more of a value for the beam virtual power headroom metric, or a value for the uplink RSRP metric.

In some aspects, the report includes one or more of an indication of an uplink resource associated with a candidate beam of the one or more beams, and one or more beam metric values, of the one or more beam metric values, for the uplink resource associated with the candidate beam.

In some aspects, the at least one beam metric value for the uplink resource associated with the candidate beam includes a value for the beam virtual power headroom metric.

In some aspects, a UE for wireless communication may include memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to identify an MPE event for a current beam based at least in part on one or more beam metric values for the current beam, wherein the one or more beam metric values correspond to one or more of a P-MPR metric, an uplink RSRP metric, or a virtual power headroom metric, and transmit a report based at least in part on the identification of the MPE event.

In some aspects, the UE is configured with a first set of uplink resources associated with one or more current beams including the current beam, and the UE is configured with one or more of a second set of uplink resources for candidate beams, or a third set of uplink resources for reporting beam metrics.

In some aspects, the first set of uplink resources, the second set of uplink resources, and the third set of uplink resources include one or more of an SRS, a PUCCH, a PUSCH, or an RRC configuration.

In some aspects, the one or more processors may be configured to identify the MPE event for the current beam based at least in part on at least one beam metric value, of the one or more beam metric values, associated with the first set of uplink resources.

In some aspects, the one or more processors may be configured to identify, based at least in part on one or more beam metric values of the second set of uplink resources, a replacement beam for the current beam.

In some aspects, the one or more processors may be configured to determine to beam switch from the current beam to the replacement beam based at least in part on the one or more beam metric values for the current beam and one or more beam metric values of the replacement beam.

In some aspects, the one or more beam metric values of the current beam and the one or more beam metric values of the replacement beam are based at least in part on multiple measurements of one or more beam metrics.

In some aspects, the determination to beam switch from the current beam to the replacement beam is based at least in part on the one or more beam metric values of the current beam failing to satisfy a first threshold, and the one or more beam metric values of the replacement beam satisfying a second threshold.

In some aspects, the determination to beam switch from the current beam to the replacement beam is based at least in part on a difference between the one or more beam metric values of the replacement beam and the one or more beam metric values of the current beam satisfying a threshold.

In some aspects, the one or more processors may be configured to beam switch from the current beam to the replacement beam.

In some aspects, the report based at least in part on the identification of the MPE event identifies one or more of the current beam, the replacement beam, the one or more beam metric values for the current beam, or the one or more beam metric values of the replacement beam.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to determine one or more beam metric values for one or more beams that are monitored by the UE, wherein the one or more beam metric values correspond to one or more of a beam P-MPR metric, a beam uplink RSRP metric, or a beam virtual power headroom metric, and transmit a report based at least in part on the one or more beam metric values.

In some aspects, the one or more beam metric values correspond to the uplink RSRP metric, and the uplink RSRP metric is based at least in part on a beam P-MPR metric.

In some aspects, the one or more beam metric values correspond to the beam virtual power headroom metric, and the beam virtual power headroom metric is based at least in part on a beam P-MPR metric.

In some aspects, the method includes calculating a value for the beam virtual power headroom metric for a beam, of the one or more beams, based at least in part on an uplink resource, or an uplink resource configuration, associated with the beam.

In some aspects, the beam virtual power headroom metric for a beam is based at least in part on a difference between a maximum power available for a transmission via an uplink resource, or an uplink resource configuration, associated with the beam, and a current transmission power setting for a transmission via the uplink resource associated with the beam.

In some aspects, the maximum power available for the transmission via the uplink resource is based at least in part on a beam P-MPR metric for the beam.

In some aspects, the current transmission power setting for the transmission via the uplink resource associated with the beam is based at least in part on a set of power control parameters including one or more of pathloss, P0, alpha, or a reference target power.

In some aspects, the uplink resource comprises a PUCCH, a PUSCH, or an SRS.

In some aspects, the uplink resource configuration includes one or more of information relating to a pathloss reference signal, information relating to a power control loop, p0, alpha, or information relating to the beam.

In some aspects, the UE transmits the report in one or more of a MAC-CE message, or an uplink beam report.

In some aspects, the report comprises at least one beam identification associated with the one or more beam metric values.

In some aspects, a beam identification of the at least one beam identification includes an uplink beam identification, a spatial reference signal identification, or an uplink resource identifier.

In some aspects, the report includes an uplink beam identification, a spatial reference signal identification, or an uplink resource identifier.

In some aspects, the report includes one or more of an indication of an uplink resource associated with a current beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the current beam.

In some aspects, the at least one beam metric value for the uplink resource associated with the current beam comprises a value for the beam virtual power headroom metric.

In some aspects, the report includes an indication of an uplink resource associated with a candidate beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the candidate beam.

In some aspects, the report comprises an indication of metric types, associated with the at least one beam metric value for the uplink resource associated with the candidate beam, that are included in the report.

In some aspects, the at least one beam metric value for the uplink resource associated with the candidate beam comprises a value for the beam virtual power headroom metric.

In some aspects, the report comprises an indication of an uplink resource associated with an additional current beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the additional current beam.

In some aspects, the report includes an indication of an uplink resource associated with an additional candidate beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the additional candidate beam.

In some aspects, the at least one beam metric value for the uplink resource associated with the current beam includes a value for the beam P-MPR metric, a value of a maximum power available for a transmission via the uplink resource associated with the current beam, and one or more of a value for the beam virtual power headroom metric, or a value for the uplink RSRP metric.

In some aspects, the report includes a value for the beam P-MPR metric, a value of a maximum power available for a transmission via the uplink resource associated with the current beam, and one or more of a value for the beam virtual power headroom metric, or a value for the uplink RSRP metric.

In some aspects, the report includes one or more of an indication of an uplink resource associated with a candidate beam of the one or more beams, and one or more beam metric values, of the one or more beam metric values, for the uplink resource associated with the candidate beam.

In some aspects, the at least one beam metric value for the uplink resource associated with the candidate beam includes a value for the beam virtual power headroom metric.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to identify an MPR event for a current beam based at least in part on one or more beam metric values for the current beam, wherein the one or more beam metric values correspond to one or more of a P-MPR metric, an uplink RSRP metric, or a virtual power headroom metric, and transmit a report based at least in part on the identification of the MPE event.

In some aspects, the UE is configured with a first set of uplink resources associated with one or more current beams including the current beam, and the UE is configured with one or more of a second set of uplink resources for candidate beams, or a third set of uplink resources for reporting beam metrics.

In some aspects, the first set of uplink resources, the second set of uplink resources, and the third set of uplink resources include one or more of an SRS, a PUCCH, a PUSCH, or an RRC configuration.

In some aspects, the one or more instructions, when executed by one or more processors of a UE, cause the one or more processors to identify the MPE event for the current beam based at least in part on at least one beam metric value, of the one or more beam metric values, associated with the first set of uplink resources.

In some aspects, the one or more instructions, when executed by one or more processors of a UE, cause the one or more processors to identify, based at least in part on one or more beam metric values of the second set of uplink resources, a replacement beam for the current beam.

In some aspects, the one or more instructions, when executed by one or more processors of a UE, cause the one or more processors to determine to beam switch from the current beam to the replacement beam based at least in part on the one or more beam metric values for the current beam and one or more beam metric values of the replacement beam.

In some aspects, the one or more beam metric values of the current beam and the one or more beam metric values of the replacement beam are based at least in part on multiple measurements of one or more beam metrics.

In some aspects, the determination to beam switch from the current beam to the replacement beam is based at least in part on the one or more beam metric values of the current beam failing to satisfy a first threshold, and the one or more beam metric values of the replacement beam satisfying a second threshold.

In some aspects, the determination to beam switch from the current beam to the replacement beam is based at least in part on a difference between the one or more beam metric values of the replacement beam and the one or more beam metric values of the current beam satisfying a threshold.

In some aspects, the one or more instructions, when executed by one or more processors of a UE, cause the one or more processors to beam switch from the current beam to the replacement beam.

In some aspects, the report based at least in part on the identification of the MPE event identifies one or more of the current beam, the replacement beam, the one or more beam metric values for the current beam, or the one or more beam metric values of the replacement beam.

In some aspects, an apparatus for wireless communication may include means for determining one or more beam metric values for one or more beams that are monitored by the apparatus, wherein the one or more beam metric values correspond to one or more of a beam P-MPR metric, a beam uplink RSRP metric, or a beam virtual power headroom metric, and means for transmitting a report based at least in part on the one or more beam metric values.

In some aspects, the one or more beam metric values correspond to the uplink RSRP metric, and the uplink RSRP metric is based at least in part on a beam P-MPR metric.

In some aspects, the one or more beam metric values correspond to the beam virtual power headroom metric, and the beam virtual power headroom metric is based at least in part on a beam P-MPR metric.

In some aspects, the apparatus includes means for calculating a value for the beam virtual power headroom metric for a beam, of the one or more beams, based at least in part on an uplink resource, or an uplink resource configuration, associated with the beam.

In some aspects, the beam virtual power headroom metric for a beam is based at least in part on a difference between a maximum power available for a transmission via an uplink resource, or an uplink resource configuration, associated with the beam and a current transmission power setting for a transmission via the uplink resource associated with the beam.

In some aspects, the maximum power available for the transmission via the uplink resource is based at least in part on a beam P-MPR metric for the beam.

In some aspects, the current transmission power setting for the transmission via the uplink resource associated with the beam is based at least in part on a set of power control parameters including one or more of pathloss, P0, alpha, or a reference target power.

In some aspects, the uplink resource comprises a PUCCH, a PUSCH, or an SRS.

In some aspects, the uplink resource configuration includes one or more of information relating to a pathloss reference signal, information relating to a power control loop, p0, alpha, or information relating to the beam.

In some aspects, the apparatus transmits the report in one or more of a MAC-CE message, or an uplink beam report.

In some aspects, the report comprises at least one beam identification associated with the one or more beam metric values.

In some aspects, a beam identification of the at least one beam identification includes an uplink beam identification, a spatial reference signal identification, or an uplink resource identifier.

In some aspects, the report includes an uplink beam identification, a spatial reference signal identification, or an uplink resource identifier.

In some aspects, the report includes one or more of an indication of an uplink resource associated with a current beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the current beam.

In some aspects, the at least one beam metric value for the uplink resource associated with the current beam comprises a value for the beam virtual power headroom metric.

In some aspects, the report includes an indication of an uplink resource associated with a candidate beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the candidate beam.

In some aspects, the report comprises an indication of metric types, associated with the at least one beam metric value for the uplink resource associated with the candidate beam, that are included in the report.

In some aspects, the at least one beam metric value for the uplink resource associated with the candidate beam comprises a value for the beam virtual power headroom metric.

In some aspects, the report includes an indication of an uplink resource associated with an additional current beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the additional current beam.

In some aspects, the report includes an indication of an uplink resource associated with an additional candidate beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the additional candidate beam.

In some aspects, the at least one beam metric value for the uplink resource associated with the current beam includes a value for the beam P-MPR metric, a value of a maximum power available for a transmission via the uplink resource associated with the current beam, and one or more of a value for the beam virtual power headroom metric, or a value for the uplink RSRP metric.

In some aspects, the report includes a value for the beam P-MPR metric, a value of a maximum power available for a transmission via the uplink resource associated with the current beam, and one or more of a value for the beam virtual power headroom metric, or a value for the uplink RSRP metric.

In some aspects, the report includes one or more of an indication of an uplink resource associated with a candidate beam of the one or more beams, and one or more beam metric values, of the one or more beam metric values, for the uplink resource associated with the candidate beam.

In some aspects, the at least one beam metric value for the uplink resource associated with the candidate beam includes a value for the beam virtual power headroom metric.

In some aspects, an apparatus for wireless communication may include means for identifying an MPR event for a current beam based at least in part on one or more beam metric values for the current beam, wherein the one or more beam metric values correspond to one or more of a P-MPR metric, an uplink RSRP metric, or a virtual power headroom metric, and means for transmitting a report based at least in part on the identification of the MPE event.

In some aspects, the apparatus is configured with a first set of uplink resources associated with one or more current beams including the current beam and the apparatus is configured with one or more of a second set of uplink resources for candidate beams, or a third set of uplink resources for reporting beam metrics.

In some aspects, the first set of uplink resources, the second set of uplink resources, and the third set of uplink resources include one or more of an SRS, a PUCCH, a PUSCH, or an RRC configuration.

In some aspects, the apparatus includes means for identifying the MPE event for the current beam based at least in part on at least one beam metric value, of the one or more beam metric values, associated with the first set of uplink resources.

In some aspects, the apparatus includes means for identifying, based at least in part on one or more beam metric values of the second set of uplink resources, a replacement beam for the current beam.

In some aspects, the apparatus includes means for determining to beam switch from the current beam to the replacement beam based at least in part on the one or more beam metric values for the current beam and one or more beam metric values of the replacement beam.

In some aspects, the one or more beam metric values of the current beam and the one or more beam metric values of the replacement beam are based at least in part on multiple measurements of one or more beam metrics.

In some aspects, the determination to beam switch from the current beam to the replacement beam is based at least in part on the one or more beam metric values of the current beam failing to satisfy a first threshold, and the one or more beam metric values of the replacement beam satisfying a second threshold.

In some aspects, the determination to beam switch from the current beam to the replacement beam is based at least in part on a difference between the one or more beam metric values of the replacement beam and the one or more beam metric values of the current beam satisfying a threshold.

In some aspects, the apparatus includes means for beam switch from the current beam to the replacement beam.

In some aspects, the report based at least in part on the identification of the MPE event identifies one or more of the current beam, the replacement beam, the one or more beam metric values for the current beam, or the one or more beam metric values of the replacement beam.

DETAILED DESCRIPTION

FIG.2shows a block diagram of a design200of base station110and UE120, which may be one of the base stations and one of the UEs inFIG.1. Base station110may be equipped with T antennas234athrough234t,and UE120may be equipped with R antennas252athrough252r,where in general T≥1 and R≥1.

Controller/processor240of base station110, controller/processor280of UE120, and/or any other component(s) ofFIG.2may perform one or more techniques associated with determining beam metrics for maximum permissible exposure reporting, as described in more detail elsewhere herein. For example, controller/processor240of base station110, controller/processor280of UE120, and/or any other component(s) ofFIG.2may perform or direct operations of, for example, process1000ofFIG.10, process1100ofFIG.11, and/or other processes as described herein. Memories242and282may store data and program codes for base station110and UE120, respectively. In some aspects, memory242and/or memory282may comprise a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, the one or more instructions, when executed by one or more processors of the base station110and/or the UE120, may perform or direct operations of, for example process1000ofFIG.10, process1100ofFIG.11, and/or other processes as described herein. A scheduler246may schedule UEs for data transmission on the downlink and/or uplink.

In some aspects, UE120may include means for determining one or more beam metric values for one or more beams that are monitored by the UE, wherein the one or more beam metric values correspond to one or more of a beam P-MPR metric, a beam uplink RSRP metric, or a beam virtual power headroom metric; means for transmitting a report based at least in part on the one or more beam metric values, and/or the like. In some aspects, such means may include one or more components of UE120described in connection withFIG.2, such as controller/processor280, transmit processor264, TX MIMO processor266, MOD254, antenna252, DEMOD254, MIMO detector256, receive processor258, and/or the like.

In some aspects, UE120may include means for identifying an MPR event for a current beam based at least in part on one or more beam metric values for the current beam, wherein the one or more beam metric values correspond to one or more of a P-MPR metric, an uplink RSRP metric, or a virtual power headroom metric; means for transmitting a report based at least in part on the identification of the MPE event, and/or the like. In some aspects, such means may include one or more components of UE120described in connection withFIG.2, such as controller/processor280, transmit processor264, TX MIMO processor266, MOD254, antenna252, DEMOD254, MIMO detector256, receive processor258, and/or the like.

FIG.3is a diagram illustrating an example300of identifying an MPE event associated with a beam, in accordance with various aspects of the present disclosure.

As shown inFIG.3, and by reference number310, a UE and a base station may communicate using directional beams. In some wireless networks, a UE may communicate with a base station using directional beamforming to boost transmission power in one or more particular directions associated with one or more beams. By concentrating transmission power in one or more beams, an output energy associated with transmissions using the one or beams may be higher than if the UE performed an omni-directional transmission for the transmissions. This may increase a range of the transmissions, but may also cause an energy density of the transmission to satisfy (e.g., exceed) an MPE value that defines a highest energy density that is allowed to be exposed to a human body at close range. An MPE value may be defined via RRC configurations, for example, to comply with a standard and/or a regulation. The standard and/or regulation may have different limits for different frequency bandwidths. For example, a limit (e.g., corresponding to the MPE value) may be lower for millimeter wave (mmWave) transmissions than for sub-6 wave transmissions.

As shown by reference number320, the UE may identify an MPE event. The UE may identify the MPE event based at least in part on detecting a part of a human body and/or other organic material at close range for the UE within a path of an uplink beam. Based at least in part on detecting a part of a human body in a direction of a beam for which transmissions would use an energy density that satisfies the MPE, the UE may reduce transmission power of one or more antennas that are associated with the beam. However, by reducing transmission power of the one or more antennas that are associated with the beam, the transmission may have insufficient power for the base station to receive the transmission. This may cause a beam failure.

As shown by reference number330, the UE may resume communicating with the base station using a new beam for uplink communications. The new beam may be in a different direction from the beam associated with the MPE event.

A UE may determine a maximum power output (e.g., P(CMAX,f,c)) for a carrier f of a serving cell c. The maximum power output may be set so that a corresponding measured peak equivalent isotropically radiated power (EIRP) and P(UMAX,f,c) are within the following bounds:

In Equation 1, MPRf,c, MPR is a maximum power reduction for a carrier f of a serving cell c, A-MPRf,cis an additional maximum power reduction for a carrier f of a serving cell c, ΔMBP,nis a peak EIRP relaxation, and P-MPRf,cis a power management maximum power reduction for a carrier f of a serving cell c. In some aspects, P-MPRf,cmay be a maximum allowed output power reduction. The UE may apply P-MPRf,cfor carrier f of serving cell c for one or more situations involving UE conformance testing. For example, the UE may apply P-MPRf,cfor carrier f of serving cell c for compliance with applicable electromagnetic power density exposure requirements, addressing unwanted emissions, and/or self-defence requirements in cases of simultaneous transmissions on multiple radio access technologies for scenarios not in the scope of 3GPP RAN specifications. The UE may apply P-MPRf,cfor carrier f of serving cell c for compliance with applicable electromagnetic power density exposure requirements in cases of proximity detection used to address such requirements that require a lower maximum output power (e.g., an MPR event). For UE conformance testing, P-MPRf,cmay be 0 dB. The UE may use the P-MPRf,cto report an available maximum output transmit power. A base station may use the P-MPRf,cand/or a Pcmax,f,cvalue for scheduling decisions. However, because the P-MPRf,cand/or the Pcmax,f,cvalues correspond to a cell, the base station is not able to use the P-MPRf,cand/or the Pcmax,f,cvalue for scheduling decisions regarding selecting beams for scheduling.

In some aspects disclosed herein, a UE (e.g., UE120) may determine one or more beam metric values (e.g., metric values that are beam-specific) for one or more beams that are monitored by the UE. The one or more beam metric values may correspond to one or more of a P-MPR metric, a beam uplink RSRP metric, a beam virtual power headroom metric, a true power headroom metric, and/or the like. The virtual power head room may be calculated based at least in part on a reference format of uplink transmission, and the true power headroom metric may be calculated based at least in part on a real uplink transmission. In some aspects, the one or more beam metric values may be based at least in part on a value of a P-MPR metric. In some aspects, the UE may identify an MPR event based at least in part on the one or more beam metric values. In some aspects, the UE may transmit a report based at least in part on the one or more beam metric values and/or the identification of the MPE event. In this way, the UE may provide information for the base station to use for scheduling decisions including beam-specific scheduling decisions.

FIG.4is a diagram illustrating an example400of reporting beam metric values and/or an MPE event report, in accordance with various aspects of the present disclosure. As shown inFIG.4, a UE (e.g., UE120) may communicate with a base station (e.g., base station110) to transmit a report based at least in part on one or more beam metric values and/or an identification of the MPE event. The UE and the base station may be part of a wireless network (e.g., wireless network100).

As shown inFIG.4, and by reference number410, the UE may determine one or more beam metric values for one or more beams that are monitored by the UE. In some aspects, the one or more beam metric values may be associated with a transmission power of the UE for the one or more beams and/or a reception power for uplink signals. For example, the one or more beam metric values may correspond to a beam P-MPR metric (also referenced as a beam-specific P-MPR), a beam uplink RSRP metric, a beam virtual power headroom metric, and/or the like. In some aspects, the one or more beam metric values (e.g., the uplink RSRP metric value, the beam virtual power headroom metric value, and/or the like) may be based at least in part on a beam P-MPR metric value.

In some aspects, a beam virtual power headroom (PH) metric value for a beam (qs) may be calculated according to Equation 2:

In Equation 2, {tilde over (P)}cmax,f,c(i, qs) may be a maximum power output at a time i that is uplink resource specific (e.g., based at least in part on the uplink resource being associated with a beam) or may be uplink resource configuration specific. In some aspects, {tilde over (P)}cmax,f,c(i, qs) may be a value that is based at least in part on a period of time. For example, {tilde over (P)}cmax,f,c(i, qs) may be an average of calculated Pcmax,f,c(i, qs) values over a period of time, a representative {tilde over (P)}cmax,f,c(i, qs) value from the period of time, and/or the like. In some aspects, PoUL,b,f,c(qs) and αUL,b,f,c(qs) may be a P0 and an alpha value that are based at least on an identification of the uplink resource (e.g., a UL resource ID). PLb,f,c(qd) may be a pathloss reference signal in a corresponding downlink resource associated with the uplink resource. In some aspects, a P0 value may represent a target received power, an alpha value may represent a compensation factor in a power control formula, and the pathloss reference signal may indicate an amount of pathloss (e.g., an amount of signal power lost during transmission to the base station). In some aspects, hUL,b,f,c(i, l) may be an uplink power control adjustment state (e.g., a value may be 0 (zero), or hUL,b,f,c(i, 0) if not configured or indicated) that is based at least in part on a power control loop (e.g., as indicated by the base station) associated with the uplink resource.

As shown in Equation 2, the beam virtual power headroom metric for a beam may be based at least in part on a difference between a maximum power available for a transmission via an uplink resource (e.g., {tilde over (P)}cmax,f,c(i, qs)), or an uplink resource configuration, associated with the beam, and a current transmission power setting for a transmission via the uplink resource associated with the beam (e.g. {PoUL,b,f,c(qs)+αUL,b,f,c(qs)*PLb,f,c(qd)+hUL,b,f,c(i, l)}) or a transmission power setting for an uplink resource configuration associated with the beam. In some aspects, the current transmission power setting for the transmission via the uplink resource associated with the beam may be based at least in part on a set of power control parameters including pathloss, P0, alpha, a reference target power, and/or the like. In some aspects, the uplink resource configuration may include information relating to a pathloss reference signal, information relating to a power control loop, p0, alpha, or information relating to the beam, and/or the like.

In some aspects, the UE may identify {tilde over (P)}cmax,f,c(i, qs), αUL,b,f,c(qs), PLb,f,c(qd), hUL,b,f,c(i, l), and/or other power control parameters based at least in part on a configuration of the UE, within a communication from the base station, and/or the like. In some aspects, {tilde over (P)}cmax,f,c(i, qs) may be based at least in part on a beam P-MPR for the uplink resource (e.g., based at least in part on an assumption that MPR may be 0 dB, A-MPR may be 0 dB, and P-MPR may be beam specific for the uplink resource). In some aspects, the UE may calculate a value for the beam virtual power headroom metric for a beam based at least in part on an uplink resource, or an uplink resource configuration, associated with the beam.

In some aspects, an uplink RSRP for a beam (qs) may be calculated according to Equation 3:

In Equation 3, the uplink RSRP is based at least in part on a difference between the maximum power available for a transmission via an uplink resource (e.g., {tilde over (P)}cmax,f,c(i, qs)), or an uplink resource configuration, associated with the beam, and a pathloss value (e.g., PLb,f,c(qd) or αUL,b,f,c(qs)*PLb,f,c(qd)) for a transmission via the uplink resource associated with the beam. As described herein, the maximum power available for a transmission via the uplink resource may be based at least in part on a P-MPR for the uplink resource.

An uplink resource associated with the calculation of Equation 2 may be a PUCCH, a PUSCH, a sounding reference signal SRS, the uplink resource associated with a CSI-RS, and/or the like.

In some aspects, the UE may be configured with a first set of uplink resources associated with one or more current beams, a second set of uplink resources for candidate beams, a third set of uplink resources for reporting beam metrics, and/or the like. In some aspects, the first set of uplink resources, the second set of uplink resources, and/or the third set of uplink resources may include an SRS, a PUCCH, a PUSCH, the uplink resource associated with a CSI-RS, an RRC configuration, and/or the like.

As shown by reference number420, the UE may identify an MPE event. In some aspects, the UE may identify the MPE event for one or more current beams based at least in part on the one or more beam metric values. In some aspects, the UE may identify the MPE event for a current beam based at least in part on at least one beam metric value, of the one or more beam metric values, associated with the first set of uplink resources.

As shown by reference number430, the UE may determine to indicate an MPE event or beam switch. In some aspects, the UE may identify the current beam and a replacement beam for beam switching. In some aspects, the UE may identify a replacement beam for the current beam based at least in part on one or more beam metric values of the second set of uplink resources.

In some aspects, the UE may determine to indicate an MPE event or beam switch from the current beam to the replacement beam based at least in part on the one or more beam metric values for the current beam and one or more beam metric values of the replacement beam. In some aspects, the one or more beam metric values of the current beam and the one or more beam metric values of the replacement beam may be based at least in part on multiple measurements of one or more beam metrics. In other words, the one or more beam metric values of the current beam and the one or more beam metric values of the replacement beam may be based at least in part on average beam metric values of the current beam and the replacement beam, representative beam metric values of the current beam and the replacement beam, and/or the like. The one or more beam metric values may be considered multi-shot and/or periodic values.

In some aspects, the UE may determine to indicate an MPE event or beam switch from the current beam to the replacement beam based at least in part on an absolute condition. For example, the UE may determine to indicate an MPE event or beam switch from the current beam to the replacement beam based at least in part on one or more beam metric values of the current beam failing to satisfy a first threshold and the one or more beam metric values of the replacement beam satisfying a second threshold. In some aspects, the first threshold may be the same as the second threshold.

In some aspects, the UE may determine indicate an MPE event or to beam switch from the current beam to the replacement beam based at least in part on a relative condition. For example, the UE may determine to indicate an MPE event or beam switch from the current beam to the replacement beam based at least in part on one or more differences between the one or more beam metric values of the replacement beam and the one or more beam metric values of the current beam satisfying a threshold. In some aspects, the threshold may be 0 (zero) so that the UE will determine to beam switch based at least in part on the one or more beam metric values of the replacement beam being better than the one or more beam metric values of the current beam. In some aspects, the threshold may be relatively high, to reduce a number of beam switching events and/or to reduce computing, communication, and/or network resources that may be consumed by frequent beam switching.

In some aspects, the one or more beam metric values correspond to an uplink RSRP metric for each beam. A first value of an uplink RSRP metric may be better than a second value of the uplink RSRP metric based at least in part on the first value of the uplink RSRP metric being higher than the second value of the uplink RSRP metric.

In some aspects, the one or more beam metric values correspond to a virtual power header metric for each beam. A first value of a virtual power header metric may be better than a second value of the virtual power header metric based at least in part on the first value of the virtual power header metric being higher than the second value of the virtual power header metric.

In some aspects, the one or more beam metric values correspond to a P-MPR metric for each beam. A first value of a beam specific P-MPR metric may be better than a second value of the beam specific P-MPR metric based at least in part on the first value of the beam specific P-MPR metric being lower than the second value of the beam specific P-MPR metric.

As shown by reference number440, the UE may transmit a report. In some aspects, the report may be based at least in part on the one or more beam metric values, the identification of the MPE event, and/or the like. In some aspects, the UE may transmit the report in a MAC-CE message, an uplink beam report, and/or the like.

In some aspects, the report may include at least one beam identification associated with the one or more beam metric values (e.g., a beam identification of each beam associated with the one or more beam metric values. In some aspects, the beam identification may include an uplink beam identification (e.g., an SRS resource indicator (SRI) for a PUSCH resource, a PUCCH spatial relation identification, an SRS spatial relation reference signal (SRS RS), and/or the like). In some aspects, the beam identification may include a spatial reference signal identification (e.g., a channel state information reference signal (CSI-RS) resource ID, a synchronization signal physical broadcast channel identification (SSB ID), and/or the like). In some aspects, the beam identification may include an uplink resource identifier (e.g., a PUCCH resource identification, an SRS resource identification, an SRS resource set identification, and/or the like).

In some aspects, as discussed further herein, the report may identify a current beam, a replacement beam, one or more beam metric values for the current beam, one or more beam metric values of the replacement beam, and/or the like. In this way, the UE may provide a proposal for beam switching and information to support the determination to beam switch. The base station may review the report and provide an acknowledgement to indicate that the proposal for beam switching is approved by the base station. The acknowledgement may indicate that the UE may begin a beam switching operation.

In some aspects, the report may include multiple current beams, multiple replacement beams (e.g., with each replacement beam corresponding to a current beam of the multiple current beams), beam metric values for the multiple current beams, beam metric values of the multiple replacement beams, and/or the like.

As shown by reference number450, the UE may beam switch. In some aspects, the UE may configure one or more components of the UE to communicate using a new beam (e.g., the replacement beam indicated in the report).

FIG.5is a diagram illustrating an example report500for beam metric values, in accordance with various aspects of the present disclosure.

As shown inFIG.5, the report may include information including one or more reserve bits (e.g., “R” bits), a service cell identification, a bandwidth part identification, a beam identification, one or more beam metrics associated with the beam identification, and/or the like. In some aspects, the report may include the information for multiple current beams and/or multiple candidate beams.

FIG.6is a diagram illustrating an example report600for beam metric values, in accordance with various aspects of the present disclosure. As shown inFIG.6, the report may identify information for an uplink resource associated with a current beam and information for an uplink resource associated with a candidate beam (e.g., a proposed new beam or proposed new uplink resource, a candidate beam and/or a candidate downlink resource that the base station may choose, and/or the like).

As shown by reference number610, the report may include an indication of an uplink resource associated with a current beam (e.g., a current uplink resource associated with the current beam) for which additional information is in the report. For example, the report shows an indication that additional information is provided within the report for a current uplink resource “C4.”

As shown by reference number620, the report may include an indication of an uplink resource associated with a candidate beam (e.g., an alternative uplink resource associated with the candidate beam) for which additional information is in the report. For example, the report shows an indication that additional information is provided within the report for a current uplink resource “C4.”

In some aspects, the indication of the uplink resource associated with the current beam and the indication of the uplink resource associated with the candidate beam may indicate that the UE proposes beam switching from the current beam to the candidate beam (e.g., from a current uplink resource associated with the current beam to an alternative uplink resource associated with the candidate beam).

As shown by reference number630, the report may include an indication of at least one beam metric value (e.g., a virtual power headroom metric value) for the uplink resource (“ci”) associated with the current beam. In some aspects, the report may also include an indication of one or more metric types, associated with the at least one beam metric value for the uplink resource associated with the current beam, that are included in the report. In some aspects, the indication may indicate whether a beam specific {tilde over (P)}cmax,f,c(denoted as Pcmax,ciinFIG.6) value for the uplink resource associated with the current beam is reported, if only a virtual power headroom metric value is reported, whether a true power headroom metric or a virtual power headroom metric is reported, and/or the like. In some aspects (e.g., based at least in part on a configuration of the UE or the report), the “V” indicator may indicate whether beam specific {tilde over (P)}cmax,f,cis reported or not for the uplink resource, if the UE is configured to report a virtual power headroom metric value for the uplink resource and not a true power headroom metric value only. In some aspects, the “V” indicator may indicate whether a value corresponds to a virtual or a true PH if both are allowed and based at least in part on another value always corresponding to beam specific is {tilde over (P)}cmax,f,cfor the uplink resource associated with the current beam.

As shown by reference number640, the report may include an indication of at least one beam metric value (e.g., a virtual power headroom metric value) for the uplink resource associated with the candidate beam. In some aspects, the report may also include an indication of one or more metric types, associated with the at least one beam metric value for the uplink resource associated with the candidate beam, that are included in the report. In some aspects, the report may also include one or more indications for the at least one beam metric value for the uplink resource associated with the candidate beam (e.g., as described in relation to reference number630).

FIG.7is a diagram illustrating an example report700for beam metric values, in accordance with various aspects of the present disclosure. As shown inFIG.7, the report may include information (e.g., as described in relation to reference numbers620and640) for an uplink resource associated with a candidate beam, with or without information for an uplink resource associated with a current beam. In some aspects, the report may include information for multiple uplink resources associated with multiple candidate beams.

FIG.8is a diagram illustrating an example report800for beam metric values, in accordance with various aspects of the present disclosure. As shown inFIG.8, the report may include information (e.g., as described in relation to reference numbers610and630) for an uplink resource associated with a current beam, with or without information for an uplink resource associated with a candidate beam. In some aspects, the report may include information for multiple uplink resources associated with multiple candidate beams.

FIG.9is a diagram illustrating an example900report for beam metric values, in accordance with various aspects of the present disclosure. As shown inFIG.9, the report may include information (e.g., as described in relation to reference numbers610and630) for an uplink resource associated with a current beam and with or without information for an uplink resource associated with a candidate beam. In some aspects, the report may include information for multiple uplink resources associated with multiple current beams.

In some aspects, the report may include a value for a beam P-MPR metric, a value of a maximum power available for a transmission via the uplink resource associated with the current beam. In some aspects, the report may include a value for a beam virtual power headroom metric, a value for an uplink RSRP metric, and or the like for the uplink resource associated with the current beam. In other words, the report may include three or more beam metric values for the uplink resource associated with the current beam. In some aspects, the report may include an indicator (e.g., “V2”) to signal that a third beam metric value is included in the report.

Although example900shows the report including information for the uplink resource associated with a candidate beam, a report may additionally or alternatively include information for an uplink resource associated with a candidate beam

As indicated above,FIG.9is provided as an example. Other examples may differ from what is described with respect toFIG.9.

FIG.10is a diagram illustrating an example process1000performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process1000is an example where the UE (e.g., UE120and/or the like) performs operations associated with techniques for determining beam metrics for maximum permissible exposure reporting.

As shown inFIG.10, in some aspects, process1000may include determining one or more beam metric values for one or more beams that are monitored by the UE, wherein the one or more beam metric values correspond to one or more of a beam P-MPR metric, a beam uplink RSRP metric, or a beam virtual power headroom metric (block1010). For example, the UE (e.g., using receive processor258, transmit processor264, controller/processor280, memory282, and/or the like) may determine one or more beam metric values for one or more beams that are monitored by the UE, as described above. In some aspects, the one or more beam metric values correspond to one or more of a beam P-MPR metric, a beam uplink RSRP metric, or a beam virtual power headroom metric.

As further shown inFIG.10, in some aspects, process1000may include transmitting a report based at least in part on the one or more beam metric values (block1020). For example, the UE (e.g., using transmit processor264, controller/processor280, memory282, and/or the like) may transmit a report based at least in part on the one or more beam metric values, as described above.

In a first aspect, the one or more beam metric values correspond to the uplink RSRP metric, and the uplink RSRP metric is based at least in part on a beam P-MPR metric.

In a second aspect, alone or in combination with the first aspect, the one or more beam metric values correspond to the beam virtual power headroom metric, and the beam virtual power headroom metric is based at least in part on a beam P-MPR metric.

In a third aspect, alone or in combination with one or more of the first and second aspects, process1000includes calculating a value for the beam virtual power headroom metric for a beam, of the one or more beams, based at least in part on an uplink resource, or an uplink resource configuration, associated with the beam.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, the beam virtual power headroom metric for a beam is based at least in part on a difference between a maximum power available for a transmission via an uplink resource, or an uplink resource configuration, associated with the beam, and a current transmission power setting for a transmission via the uplink resource associated with the beam.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the maximum power available for the transmission via the uplink resource is based at least in part on a beam P-MPR metric for the beam.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the current transmission power setting for the transmission via the uplink resource associated with the beam is based at least in part on a set of power control parameters including one or more of pathloss, P0, alpha, or a reference target power.

In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the uplink resource comprises a PUCCH, a PUSCH, or an SRS.

In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the uplink resource configuration includes one or more of information relating to a pathloss reference signal, information relating to a power control loop, p0, alpha, or information relating to the beam.

In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the UE transmits the report in one or more of a MAC-CE message, or an uplink beam report.

In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the report comprises at least one beam identification associated with the one or more beam metric values.

In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, a beam identification of the at least one beam identification includes an uplink beam identification, a spatial reference signal identification, or an uplink resource identifier.

In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, the report includes an uplink beam identification, a spatial reference signal identification, or an uplink resource identifier.

In a thirteenth aspect, alone or in combination with one or more of the first through twelfth aspects, the report includes one or more of an indication of an uplink resource associated with a current beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the current beam.

In a fourteenth aspect, alone or in combination with one or more of the first through thirteenth aspects, the at least one beam metric value for the uplink resource associated with the current beam comprises a value for the beam virtual power headroom metric.

In a fifteenth aspect, alone or in combination with one or more of the first through fourteenth aspects, the report includes an indication of an uplink resource associated with a candidate beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the candidate beam.

In a sixteenth aspect, alone or in combination with one or more of the first through fifteenth aspects, the report comprises an indication of metric types, associated with the at least one beam metric value for the uplink resource associated with the candidate beam, that are included in the report.

In a seventeenth aspect, alone or in combination with one or more of the first through sixteenth aspects, the at least one beam metric value for the uplink resource associated with the candidate beam comprises a value for the beam virtual power headroom metric.

In an eighteenth aspect, alone or in combination with one or more of the first through seventeenth aspects, the report includes an indication of an uplink resource associated with an additional current beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the additional current beam.

In a nineteenth aspect, alone or in combination with one or more of the first through eighteenth aspects, the report includes an indication of an uplink resource associated with an additional candidate beam of the one or more beams, and at least one beam metric value, of the one or more beam metric values, for the uplink resource associated with the additional candidate beam.

In a twentieth aspect, alone or in combination with one or more of the first through nineteenth aspects, the at least one beam metric value for the uplink resource associated with the current beam includes a value for the beam P-MPR metric, a value of a maximum power available for a transmission via the uplink resource associated with the current beam, and one or more of a value for the beam virtual power headroom metric, or a value for the uplink RSRP metric.

In a twenty-first aspect, alone or in combination with one or more of the first through twentieth aspects, the report includes a value for the beam P-MPR metric, a value of a maximum power available for a transmission via the uplink resource associated with the current beam, and one or more of a value for the beam virtual power headroom metric, or a value for the uplink RSRP metric.

In a twenty-second aspect, alone or in combination with one or more of the first through twenty-first aspects, the report includes one or more of an indication of an uplink resource associated with a candidate beam of the one or more beams, and one or more beam metric values, of the one or more beam metric values, for the uplink resource associated with the candidate beam.

In a twenty-third aspect, alone or in combination with one or more of the first through twenty-second aspects, the at least one beam metric value for the uplink resource associated with the candidate beam includes a value for the beam virtual power headroom metric.

FIG.11is a diagram illustrating an example process1100performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process1100is an example where the UE (e.g., UE120and/or the like) performs operations associated with techniques for determining beam metrics for maximum permissible exposure reporting.

As shown inFIG.11, in some aspects, process1100may include identifying an MPE event for a current beam based at least in part on one or more beam metric values for the current beam, wherein the one or more beam metric values correspond to one or more of a P-MPR metric, an uplink RSRP metric, or a virtual power headroom metric (block1110). For example, the UE (e.g., using receive processor258, transmit processor264, controller/processor280, memory282, and/or the like) may identify an MPE event for a current beam based at least in part on one or more beam metric values for the current beam, as described above. In some aspects, the one or more beam metric values correspond to one or more of a P-MPR metric, an uplink RSRP metric, or a virtual power headroom metric.

As further shown inFIG.11, in some aspects, process1100may include transmitting a report based at least in part on the identification of the MPE event (block1120). For example, the UE (e.g., using transmit processor264, controller/processor280, memory282, and/or the like) may transmit a report based at least in part on the identification of the MPE event, as described above.

In a first aspect, the UE is configured with a first set of uplink resources associated with one or more current beams, including the current beam, and the UE is configured with one or more of a second set of uplink resources for candidate beams, or a third set of uplink resources for reporting beam metrics.

In a second aspect, alone or in combination with the first aspect, the first set of uplink resources, the second set of uplink resources, and the third set of uplink resources include one or more of an SRS, a PUCCH, a PUSCH, or an RRC configuration.

In a third aspect, alone or in combination with one or more of the first and second aspects, process1100includes identifying the MPE event for the current beam based at least in part on at least one beam metric value, of the one or more beam metric values, associated with the first set of uplink resources.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, process1100includes identifying, based at least in part on one or more beam metric values of the second set of uplink resources, a replacement beam for the current beam.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, process1100includes determining to beam switch from the current beam to the replacement beam based at least in part on the one or more beam metric values for the current beam and one or more beam metric values of the replacement beam.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the one or more beam metric values of the current beam and the one or more beam metric values of the replacement beam are based at least in part on multiple measurements of one or more beam metrics.

In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the determination to beam switch from the current beam to the replacement beam is based at least in part on the one or more beam metric values of the current beam failing to satisfy a first threshold, and the one or more beam metric values of the replacement beam satisfying a second threshold.

In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the determination to beam switch from the current beam to the replacement beam is based at least in part on a difference between the one or more beam metric values of the replacement beam and the one or more beam metric values of the current beam satisfying a threshold.

In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, process1100includes beam switching from the current beam to the replacement beam.

In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the report based at least in part on the identification of the MPE event identifies one or more of the current beam, the replacement beam, the one or more beam metric values for the current beam, or the one or more beam metric values of the replacement beam.

FIG.12is a conceptual data flow diagram1200illustrating a data flow between different components in an example apparatus1202. The apparatus1202may be a UE (e.g., UE120). In some aspects, the apparatus1202includes a reception component1204, a determination component1206, an identification component1208, an initiation component1210, and/or a transmission component1212.

In some aspects, the apparatus may communicate with a base station via one or more beams using the reception component1204and the transmission component1212. The apparatus may use the determination component1206to determine one or more beam metric values (e.g., a beam P-MPR metric value, a beam downlink RSRP metric value, a beam virtual power headroom metric, and/or the like) for one or more beams that are monitored by the apparatus. The apparatus may use the identification component1208to identify an MPE event for a current beam based at least in part on the one or more beam metric values. The apparatus may transmit a report based at least in part on the one or more beam metric values, the identification of the MPE event, and/or the like.