| CPC H04W 52/52 (2013.01) [H04B 1/401 (2013.01); H04W 8/24 (2013.01); H04W 52/0261 (2013.01); H04W 52/146 (2013.01); H04W 52/365 (2013.01); H04W 72/23 (2023.01)] | 27 Claims |
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1. An apparatus for wireless communications by a user equipment (UE) that is capable of operating a first power amplifier of the UE according to a first transmission efficiency operating mode and a second transmission efficiency operating mode that is less power efficient than the first transmission efficiency operating mode, the first transmission efficiency operating mode associated with a first undesired emission level and the second transmission efficiency operating mode associated with a second undesired emission level that is lower than the first undesired emission level, the apparatus comprising:
the first power amplifier;
at least one antenna;
a processor;
memory coupled with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
transmit a power headroom report indicating a power headroom for a plurality of subbands within a channel bandwidth, the power headroom based at least in part on a respective maximum transmit power associated with each of the plurality of subbands;
receive, from a network entity and based at least in part on transmitting the power headroom report, control signaling that indicates at least one communication parameter for communicating an uplink transmission and indicates a first subband for the uplink transmission from the plurality of subbands, each of the plurality of subbands associated with the respective maximum transmit power of a plurality of subband level maximum transmit powers;
select to operate the first power amplifier of the UE in the first transmission efficiency operating mode based at least in part on a determination that the at least one communication parameter indicated by the control signaling satisfies at least one parameter criterion for operating in the first transmission efficiency operating mode, wherein the at least one communication parameter indicated in the control signaling is a defined quantity of transmission time intervals between reception of the control signaling and transmission of the uplink transmission and the at least one parameter criterion is that the UE is capable of switching from the second transmission efficiency operating mode to the first transmission efficiency operating mode within the defined quantity of the transmission time intervals, wherein the selecting to operate in the first transmission efficiency operating mode is further based at least in part on a first maximum transmit power of the plurality of subband level maximum transmit powers, the first maximum transmit power associated with the first subband;
transmit a mode indicator to indicate that the UE is operating in the first transmission efficiency operating mode based at least in part on the UE being capable of switching from the second transmission efficiency operating mode to the first transmission efficiency operating mode within the defined quantity of the transmission time intervals between reception of the control signaling and transmission of the uplink transmission, wherein:
the first power amplifier is configured to generate the uplink transmission in accordance with the first transmission efficiency operating mode; and
the at least one antenna is configured to transmit the uplink transmission in accordance with the mode indicator, and
transmit the uplink transmission via the first subband based at least in part on the first transmission efficiency operating mode and the first maximum transmit power.
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