Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify an available energy for uplink transmission of a plurality of communication links of the UE. The UE may configure, from the available energy, a first set of energy allocations for the plurality of communication links. The UE may configure a second set of energy allocations for one or more communication links of the plurality of communication links, wherein the second set of energy allocations are allocated from a remainder of the available energy after the first set of energy allocations are allocated. The UE may transmit based at least in part on at least one of the first set of energy allocations or the second set of energy allocations. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may allocate a first amount of power to one or more radios for a time window based on radio frequency (RF) exposure information and one or more other criteria. The UE may allocate a second amount of power to a selected channel or communication utilized by at least one radio of the one or more radios for one or more time frames within the time window based on the first amount of power allocated to the at least one radio for the time window. The UE may transmit the selected channel or communication based on the first amount of power or the second amount of power. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. A user equipment (UE) may configure a first initial set of maximum transmit powers for a first subscriber module. The UE may configure a second initial set of maximum transmit powers for a second subscriber module. The UE may configure a first maximum transmit power associated with a first connection for the first subscriber module. The UE may configure, independently of the configuration of the first maximum transmit power, a second maximum transmit power associated with the second connection. The UE may transmit based at least in part on at least one of the first maximum transmit power or the second maximum transmit power. Numerous other aspects are described.

Abstract: Techniques and apparatus for service-based transmit energy allocation are described. An example method that may be performed by a wireless communication device includes obtaining reserve information associated with services allocated to a set of antenna groups. Each antenna group is associated with at least one radio corresponding to at least one radio access technology (RAT). A reserve is determined for each radio, based at least in part on the reserve information, a set of services mapped to the radio, and a respective state associated with each of the set of services. A signal(s) is transmitted for at least one service using at least one radio associated with the at least one service and a transmit power determined based at least in part on a radio frequency (RF) exposure limit associated with the at least one radio and the reserve for the at least one radio.

Abstract: Methods, systems, and devices for wireless communications are described. A first device may monitor for a set of reference signals from a second device using a set of directional beams. The first device may perform measurements on the received reference signals and select a subset of directional beams from the set of directional beams based on the performed measurements. Each directional beam may be associated with a set of beamforming weights. The first device may communicate with the second device using a dynamic set of beamforming weights. The first device may form the dynamic set of beamforming weights using a combination of beamforming weights from each set of beamforming weights associated with the subset of directional beams. The dynamic set of beamforming weights may be different from each set of beamforming weights associated with the subset of directional beams.

Abstract: Techniques and apparatus for enhancing transmission power limits and joint input power limits for transmissions from multiple antenna ports in compliance with radio frequency (RF) exposure limits are described. A method that may be performed by a wireless communication device includes receiving, from a network entity, an uplink grant scheduling an uplink transmission from a set of antennas. The uplink grant indicates a transmission mode for the uplink transmission. A respective transmission power limit is determined for each antenna in the set of antennas, based at least in part on the transmission mode and in compliance with an RF exposure limit. The uplink transmission is sent via the set of antennas according to the respective transmission power limits.

Abstract: Techniques and apparatus for operating a wireless device pursuant to RF exposure compliance are provided. An example method generally includes: when an RFECS1 of the wireless device is in an online state, controlling, via the RFECS1, at least one of one or more first radios associated with a first RAT or one or more second radios associated with a second RAT, in compliance with an RF exposure limit and based on at least one of first RF exposure information associated with the one or more first radios or second RF exposure information associated with the one or more second radios; and when the RFECS1 is unavailable, controlling, via a second RF exposure control scheme, the one or more second radios associated with the second RAT in compliance with the RF exposure limit and based on third RF exposure information associated with the one or more second radios.

Abstract: Certain aspects of the present disclosure provide techniques and apparatus for a mobile satellite communications application that is aware of radio frequency (RF) exposure. An example method of wireless communication by a wireless device includes determining an RF exposure budget for one or more future transmissions in compliance with an RF exposure limit. The method further includes obtaining a size of a payload for a potential transmission. The method further includes determining transmission information based at least in part on the RF exposure budget and the size of the payload. The method further includes outputting the transmission information for a user of the wireless device.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine, for a radio associated with the UE, an energy usage in a past transmit interval. The UE may determine, for the radio, a requested usage-aware energy reservation based at least in part on the energy usage in the past transmit interval. The UE may assign, for a next transmit interval, an energy budget limit for the radio based at least in part on the requested usage-aware energy reservation. The UE may transmit, via the radio, an uplink transmission based at least in part on the energy budget limit. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described that support techniques for transmission power determination for radio frequency (RF) exposure compliance. A transmitting device, such as a user equipment (UE) may determine an uplink transmit power limit for a time window based on an RF limit and a duration of the time window. The device may use the power limit to determine an uplink transmit power based on a computed uplink transmission period for the time window that accounts for a time period during which the device is expected to actually transmit. The computed uplink transmission period may be based on one or more actual uplink transmission periods during one or more prior time windows, a predictive model, network signaling, or any combinations thereof. The device may transmit one or more uplink transmissions during the time window using the determined uplink transmit power.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify a first transmit power limit based at least in part on at least one of a specific absorption rate limit, a maximum permissible exposure limit, or a power density limit. The UE may modify, based at least in part on a scaling factor associated with a time interval, the first transmit power limit to obtain a modified first transmit power limit. The UE may transmit a signal based at least in part on the modified first transmit power limit. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described that support techniques for transmission power determination for radio frequency (RF) exposure compliance. A transmitting device, such as a user equipment (UE) may determine an uplink transmit power limit for a time window based on an RF limit and a duration of the time window. The device may use the power limit to determine an uplink transmit power based on a computed uplink transmission period for the time window that accounts for a time period during which the device is expected to actually transmit. The computed uplink transmission period may be based on one or more actual uplink transmission periods during one or more prior time windows, a predictive model, network signaling, or any combinations thereof. The device may transmit one or more uplink transmissions during the time window using the determined uplink transmit power.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may measure a beam, according to a measurement configuration, to determine a channel condition value of the beam, modify the channel condition value based at least in part on at least one of one or more beam characterizations, a derivation of a beamforming gain value, or an estimation of the beamforming gain value, and transmit, to a base station, a measurement report indicating the modified channel condition value. Numerous other aspects are provided.

Abstract: A method for wireless communication at a UE and related apparatus are provided. In the method, the UE first transmits, to a network entity, RF information indicating coupling states of multiple bands of the UE based on an RF exposure of the multiple bands. The UE then communicates, after providing the RF information indicating the coupling states, with the network entity through one or more of the multiple bands.

Abstract: Certain aspects of the present disclosure provide techniques and apparatus for operating a wireless device pursuant to radio frequency (RF) exposure compliance. A method that may be performed by a wireless device includes determining a transmit power associated with a transmission occasion and determining an energy usage associated with the transmission occasion based on the transmit power. The method also includes determining a total energy usage for a time window or a time interval associated with a RF exposure limit based on the energy usage associated with the transmission occasion. The method further includes transmitting a signal in the transmission occasion at the transmit power if the total energy usage satisfies an energy budget.

Abstract: Methods, systems, and devices for wireless communication are described. In some systems, a wireless device may detect, using a sensor at the wireless device, one or more locations at which human tissue may be present within a coverage area of the sensor. The wireless device may select, from a set of beams, a beam and a corresponding transmit power. The wireless device may select the beam and the corresponding transmit power based on the detection of the one or more locations at which the human tissue is present within the coverage area of the sensor and a radio frequency coverage area of the beam. The wireless device may transmit uplink data using the selected beam and the selected transmit power.

Abstract: Certain aspects of the present disclosure provide techniques for adaptive antenna mode switching. An example method performed by a wireless device includes reporting first capability information indicating that the wireless device supports a first antenna mode associated with a first number of receive antennas, detecting radio conditions that favor a second antenna mode associated with a second number of receive antennas, and performing one or more actions to cause a switch to the second antenna mode based on the detected radio conditions.

Abstract: Certain aspects of the present disclosure provide techniques for transmit energy allocation. A method that may be performed by a wireless device includes establishing first and second wireless communication connections and allocating an available energy between the first and second wireless communication connections by: allocating a first portion of the available energy to the first wireless communication connection based at least in part on one or more functionalities associated with the first wireless communication connection; allocating a second portion of the available energy to the second wireless communication connection based at least in part on one or more functionalities associated with the second wireless communication connection; and allocating a third portion of the available energy to the first and/or the second wireless communication connections based at least in part on energy efficiencies of the first and second wireless communication connections.

Abstract: Certain aspects of the present disclosure provide techniques for operating a wireless device pursuant to radio frequency (RF) exposure compliance. A method that may be performed by a wireless device includes switching sensing circuitry to a first mode in response to one or more first criteria being satisfied; switching the sensing circuitry to a second mode in response to one or more second criteria being satisfied; and transmitting a signal at a transmit power determined based at least in part on a radio frequency (RF) exposure limit, and if the sensing circuitry is operating in the second mode, on one or more measurements associated with the sensing circuitry.

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may transmit a sounding reference signal (SRS) to a base station using an SRS antenna switch (SRS-AS) or an SRS carrier switch (SRS-CS) transmission technique and the UE may feature multiple antenna groups that have separate exposure budgets due to their spatial separation. The UE may employ one or more accounting procedures for tracking energy contributions associated with the SRS across the multiple antenna groups of the UE and may employ one or more power control procedures for setting a transmit power for an uplink signal in accordance with the energy contributions associated with the SRS.