Patent Description:
United States Patent Application Publication No. <CIT> relates to a transmission mode selecting method, and an antenna transmission/reception combination determining method, device and system. European Patent Application Publication No. <CIT> relates to a method for cancelling self-interference by apparatus that uses a full duplex radio scheme. United States Patent Application Publication No. <CIT> relates to a full-duplex transmission control method, user equipment and base station.

In some aspects, a method of wireless communication, performed by a user equipment (UE), may include determining an energy per resource element (EPRE) value for a slot based at least in part on whether the slot is associated with a half-duplex configuration or a full-duplex configuration, wherein the EPRE value is a first value when the slot is associated with the half-duplex configuration and a second value when the slot is associated with the full-duplex configuration; and performing a communication in the slot in accordance with the EPRE value.

In some aspects, a method of wireless communication, performed by a base station, may include determining an EPRE value for a slot based at least in part on whether the slot is associated with a half-duplex configuration or a full-duplex configuration, wherein the EPRE value is a first value when the slot is associated with the half-duplex configuration and a second value when the slot is associated with the full-duplex configuration; and communicating with a UE in the slot based at least in part on the EPRE value.

In some aspects, a UE for wireless communication may include memory; one or more processors coupled to the memory; and instructions stored in the memory and operable, when executed by the one or more processors, to cause the UE to determine an EPRE value for a slot based at least in part on whether the slot is associated with a half-duplex configuration or a full-duplex configuration, wherein the EPRE value is a first value when the slot is associated with the half-duplex configuration and a second value when the slot is associated with the full-duplex configuration; and perform a communication in the slot in accordance with the EPRE value.

In some aspects, a base station for wireless communication may include memory; one or more processors coupled to the memory; and instructions stored in the memory and operable, when executed by the one or more processors, to cause the base station to determine an EPRE value for a slot based at least in part on whether the slot is associated with a half-duplex configuration or a full-duplex configuration, wherein the EPRE value is a first value when the slot is associated with the half-duplex configuration and a second value when the slot is associated with the full-duplex configuration; and communicate with a UE in the slot based at least in part on the EPRE value.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication that, when executed by one or more processors of a UE, may cause the UE to determine an EPRE value for a slot based at least in part on whether the slot is associated with a half-duplex configuration or a full-duplex configuration, wherein the EPRE value is a first value when the slot is associated with the half-duplex configuration and a second value when the slot is associated with the full-duplex configuration; and perform a communication in the slot in accordance with the EPRE value.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication that, when executed by one or more processors of a base station, may cause the one or more processors to determine an EPRE value for a slot based at least in part on whether the slot is associated with a half-duplex configuration or a full-duplex configuration, wherein the EPRE value is a first value when the slot is associated with the half-duplex configuration and a second value when the slot is associated with the full-duplex configuration; and communicate with a UE in the slot based at least in part on the EPRE value.

In some aspects, an apparatus for wireless communication may include means for determining an EPRE value for a slot based at least in part on whether the slot is associated with a half-duplex configuration or a full-duplex configuration for a base station associated with the apparatus, wherein the EPRE value is a first value when the slot is associated with the half-duplex configuration and a second value when the slot is associated with the full-duplex configuration; and means for performing a communication in the slot in accordance with the EPRE value.

In some aspects, an apparatus for wireless communication may include means for determining an EPRE value for a slot based at least in part on whether the slot is associated with a half-duplex configuration or a full-duplex configuration, wherein the EPRE value is a first value when the slot is associated with the half-duplex configuration and a second value when the slot is associated with the full-duplex configuration; and means for communicating with a user equipment (UE) based at least in part on the EPRE value.

Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the drawings.

A UE and a base station may communicate based at least in part on an energy per resource element (EPRE). An EPRE identifies an energy level at a resource element (RE) granularity for an uplink communication or a downlink communication. EPRE may be set and updated via radio resource control (RRC) signaling, for example, by modifying a set of parameters associated with the EPRE. However, in sub-band full-duplex (SBFD) deployments, a slot configuration (e.g., full-duplex versus half-duplex) may change from slot to slot. RRC configuration or reconfiguration may not provide sufficient responsiveness for slot-to-slot modification of the EPRE. If the same EPRE is used for full-duplex slots and half-duplex slots, the base station and the UE may experience increased self-interference, power-limited scenarios, and diminished throughput.

Some techniques and apparatuses described herein provide determination and/or signaling of EPRE on a slot-to-slot granularity, for example, for transitioning between half-duplex slots and full-duplex slots. For example, a base station may configure separate EPRE values for half-duplex slots and full-duplex slots, may configure an offset for a full-duplex slot EPRE relative to a half-duplex slot EPRE, and/or the like. Some UEs may determine whether to use a full-duplex slot EPRE or a half-duplex slot EPRE based at least in part on whether a slot is a full-duplex slot or a half-duplex slot, whereas other UEs may be configured or may receive a dynamic indication regarding whether to use the full-duplex slot EPRE (e.g., based at least in part on whether a UE is capable of determining whether a slot is a full-duplex slot or a half-duplex slot). Thus, slot-to-slot adjustment of EPRE based at least in part on full-duplex slots and half-duplex slots is provided. The slot-to-slot adjustment of EPRE may reduce self-interference at the base station and improve performance in the full-duplex mode, thereby increasing throughput, improving utilization of communication resources, and improving coverage, particularly at the cell edge.

In some aspects, two or more UEs <NUM> (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more side link channels (e.g., without using a base station <NUM> as an intermediary to communicate with one another).

Controller/processor <NUM> of base station <NUM>, controller/processor <NUM> of UE <NUM>, and/or any other component(s) of <FIG> may perform one or more techniques associated with EPRE determination for SBFD communications, as described in more detail elsewhere herein. For example, controller/processor <NUM> of base station <NUM>, controller/processor <NUM> of UE <NUM>, and/or any other component(s) of <FIG> may perform or direct operations of, for example, process <NUM> of <FIG>, process <NUM> of <FIG>, and/or other processes as described herein. Memories <NUM> and <NUM> may store data and program codes for base station <NUM> and UE <NUM>, respectively. In some aspects, memory <NUM> and/or memory <NUM> may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and/or program code) for wireless communication. For example, the one or more instructions, when executed (e.g., directly, or after compiling, converting, and/or interpreting) by one or more processors of the base station <NUM> and/or the UE <NUM>, may cause the one or more processors, the UE <NUM>, and/or the base station <NUM> to perform or direct operations of, for example, process <NUM> of <FIG>, process <NUM> of <FIG>, and/or other processes as described herein. In some aspects, executing instructions may include running the instructions, converting the instructions, compiling the instructions, and/or interpreting the instructions, among other examples.

<FIG> is a diagram illustrating examples of an SBFD configuration and a baseline TDD configuration, in accordance with various aspects of the present disclosure. <FIG> shows examples of time intervals (e.g., slots, slot groups, subframes, sub-slots, mini-slots, and/or the like). A time interval may include an uplink frequency region, a downlink frequency region, or both an uplink frequency region and a downlink frequency region. Each time interval may be associated with a control region, which is illustrated as a darker-shaded portion of the time interval, and/or a data region, which is shown as DL Data for the downlink frequency region or physical uplink shared channel (PUSCH) for the uplink frequency region. Uplink frequency regions are illustrated using a tighter dotted fill than downlink frequency regions.

A frequency division duplexing (FDD) configuration may indicate one or more downlink frequency regions and one or more uplink frequency regions. For example, an FDD configuration may divide an unpaired band (e.g., one or more component carriers of an unpaired band) into uplink frequency regions, downlink frequency regions, and/or other regions (e.g., guard bands and/or the like). Examples of unpaired bands include NR operating bands n40, n41, and n50. In some aspects, the FDD configuration may identify bandwidth part (BWP) configurations corresponding to the uplink frequency regions and downlink frequency regions. For example, a respective BWP may be configured for each uplink frequency region and each downlink frequency region. A BWP is a configured bandwidth that a UE can use for communication. A BWP can be configured for a UE, then activated for communication using downlink control information.

An uplink frequency region and a downlink frequency region may or may not be equal in bandwidth. For example, in the example <NUM> shown in <FIG>, the two downlink frequency regions, shown by reference numbers <NUM> and <NUM>, occupy a smaller bandwidth than the uplink frequency region shown by reference number <NUM>. In this case, the uplink frequency region is provided between the downlink frequency regions, which may reduce interference from downlinks of other BSs <NUM> associated with frequencies adjacent to the component carrier of example <NUM>.

The usage of SBFD (also referred to as FDD in unpaired spectrum) may increase throughput and improve spectral efficiency, and may enable the usage of always-on uplink (e.g., for ultra reliable low latency communication (URLLC) control channels). For example, consider, as a baseline, a TDD configuration of down-down-special-up, shown by reference number <NUM>. This may be associated with, for example, a downlink cell edge rate of <NUM> Mbps and an uplink cell edge rate of <NUM> kbps (e.g., with a <NUM> Mbps median user rate, that is 20dB less the maximum coupling loss (MCL)). In this case, SBFD with an <NUM> downlink and a <NUM> uplink may reduce downlink cell edge spectral efficiency (SE) by <NUM>, assuming power spectral density (PSD) is not increased to utilize baseline power. In such a case, <NUM>~<NUM> Mbps may be achievable with a full duty cycle. The uplink UE SE may have no change at the cell edge and at the median. In this case, <NUM> kbps may be achieved at the cell edge, and <NUM> Mbps may be achieved at the median. Performance may be further improved for a full-duplex UE. In this case, assuming the same parameters as the previous example, a downlink throughput of <NUM> Mbps and an uplink throughput of <NUM> kbps may be concurrently achieved. It should also be noted that the usage of FDD in the unpaired spectrum may improve utilization of uplink resources, since a given UE cannot typically utilize the full uplink bandwidth due to limitations on the UE's transmit power.

A base station may operate in a full-duplex TDD mode. For example, the base station may switch, on a slot-to-slot basis, between full-duplex TDD mode and half-duplex mode. The base station may schedule communications with various half-duplex or full-duplex UEs. The base station may experience some amount of interference in connection with the full-duplex TDD mode, for example, due to self-interference between transmit antennas and receive antenna of the base station, reflection from obstructions in the channel, or inter-cell interference. The base station may perform various techniques for nullifying or cancelling self-interference, such as antenna isolation (using physically separated antennas for transmission or reception), analog interference cancellation, digital interference cancellation, massive MIMO (M-MIMO) based beamforming nulling for clutter reflection, and SBFD to achieve isolation based at least in part on an adjacent channel leakage ratio (ACLR), and/or the like. In SBFD, the downlink and the uplink are in different portions of a band or component carrier (CC). A guard band (GB) may be provided between the uplink and the downlink. Receive weighted overlap and add (WOLA) operations may reduce ACLR leakage to the uplink signal. Analog low pass filters may improve analog-digital converter (ADC) dynamic range.

Other examples may differ from what is provided with regard to <FIG>.

A UE and a base station may communicate based at least in part on an energy per resource element (EPRE). An EPRE identifies an energy level at a resource element (RE) granularity for an uplink communication or a downlink communication. EPRE may be configured as a ratio or offset relative to a signal with a known energy level so that the receiver can determine the EPRE of another signal based at least in part on the known power. As one example, consider a synchronization signal block (SSB). EPRE may be constant across the bandwidth and the secondary synchronization signal (SSS) carried in different synchronization signal (SS)/physical broadcast channel (PBCH) blocks (also referred to as SSBs). The ratio of SSS EPRE to PBCH demodulation reference signal (DM-RS) EPRE may be <NUM> dB in some aspects. The SSS EPRE may be derived from a parameter (e.g., ss-PBCH-BlockPower):.

As another example, consider a channel state information reference signal (CSI-RS). For the CSI-RS, EPRE may be constant across the configured bandwidth and OFDM symbols. The CSI-RS EPRE is derived via an offset. For example, the power offset of a non-zero-power (NZP) CSI-RS RE relative to an SSS RE may be defined by a parameter (e.g., powerControlOffsetSS):.

The power offset of a physical downlink shared channel (PDSCH) RE relative to the NZP CSI-RS RE may be defined by a parameter (e.g., powerControlOffset, which may use values from -8dB to <NUM> dB with <NUM> dB step size):.

A base station may benefit from decreasing EPRE during full-duplex, or may be limited with regard to the maximum EPRE that can be used for full-duplex operation. For example, EPRE may be different in a full-duplex slot than a half-duplex slot because of the antenna panel operation of the base station. In a half-duplex slot, the entire antenna panel may be used for a transmit operation or a receive operation, whereas in a full-duplex slot, part of the antenna panel may be used for a transmit operation and part of the antenna panel may be used for a receive operation. This may lead to changes in EPRE, for example, due to maximum transmit power of the base station's antenna panel or self-interference in the full-duplex mode. For example, increased EPRE in a full-duplex slot may be correlated with a smaller ACLR. Thus, the base station may benefit from decreasing EPRE during a full-duplex slot.

The EPRE may be set and updated via radio resource control (RRC) signaling, for example, by modifying the parameters shown above. However, in SBFD, a slot configuration (e.g., full-duplex versus half-duplex) may change from slot to slot. RRC configuration or reconfiguration may not provide sufficient responsiveness for slot-to-slot modification of the EPRE. If the same EPRE is used for full-duplex slots and half-duplex slots, the base station and the UE may experience increased self-interference, power-limited scenarios, and diminished throughput.

Some techniques and apparatuses described herein provide determination and/or signaling of EPRE on a slot-to-slot granularity, for example, for transitioning between half-duplex slots and full-duplex slots. For example, a base station may configure separate EPRE values for half-duplex slots and full-duplex slots, may configure an offset for a full-duplex slot EPRE relative to a half-duplex slot EPRE, and/or the like. Some UEs may determine whether to use a full-duplex slot EPRE or a half-duplex slot EPRE based at least in part on whether a slot is a full-duplex slot or a half-duplex slot, whereas other UEs may be configured or dynamically indicated regarding whether to use the full-duplex slot EPRE (e.g., based at least in part on whether a UE is capable of determining whether a slot is a full-duplex slot or a half-duplex slot). Furthermore, the full-duplex slot EPRE may be associated with a constant SSB EPRE, and EPRE offsets from the PDSCH to the demodulation reference signal (DMRS) and the NZP-CSI-RS may be defined, thereby enabling consistent SSB transmit power across all UEs while modifying transmit power of the PDSCH, the DMRS, and/or the CSI-RS for full-duplex operation. Thus, slot-to-slot adjustment of EPRE based at least in part on full-duplex slots and half-duplex slots is provided. The slot-to-slot adjustment of EPRE may reduce self-interference at the base station and improve performance in the full-duplex mode, thereby increasing throughput, improving utilization of communication resources, and improving coverage, particularly at the cell edge.

<FIG> is a diagram illustrating an example <NUM> of determination of EPRE values for a full-duplex slot and/or a half-duplex slot, in accordance with various aspects of the present disclosure. As shown, example <NUM> includes a full-duplex (FD) UE <NUM> and a half-duplex (HD) UE <NUM>, as well as a BS <NUM>. The FD UE <NUM> may be capable of FD communication in a slot. The HD UE <NUM>, in example <NUM>, may be incapable of determining whether a slot is an HD slot or an FD slot. For example, the HD UE <NUM> may be a legacy UE. In some aspects, the HD UE <NUM> may not determine whether a slot is an HD slot or an FD slot (e.g., irrespective of whether the HD UE <NUM> is capable of doing so).

As shown, example <NUM> relates to an FD slot <NUM> and an HD slot <NUM>. The operations enclosed within the dashed box labeled as "FD slot <NUM>" may occur within an FD slot or may relate to an FD slot, and the operations enclosed within the dashed box labeled as "HD slot <NUM>" may occur within an HD slot or may relate to an HD slot. The operations shown within a dashed box in <FIG> may not necessarily occur within a single slot.

As shown by reference number <NUM>, the BS <NUM> may provide configuration information (e.g., RRC configuration information and/or the like) to the FD UE <NUM> and/or the HD UE <NUM>. In some aspects, the BS <NUM> may provide the configuration information to both of the FD UE <NUM> and the HD UE <NUM>. In some aspects, the BS <NUM> may provide the configuration information to only one of the FD UE <NUM> or the HD UE <NUM>. The configuration information may indicate a value of an FD slot EPRE (e.g., an EPRE value to be used for communication in an FD slot). In some aspects, the configuration information may identify a reduction (e.g., an offset) relative to an HD slot EPRE (e.g., a baseline EPRE), such as a reduction of X dB. For example, X may be based at least in part on an interference cancellation capability of the BS <NUM>, a panel configuration in the FD slot, and/or the like. In some aspects, a UE (e.g., FD UE <NUM> or HD UE <NUM>) may be pre-configured with a value of an FD slot EPRE or an offset defining the FD slot EPRE relative to an HD slot EPRE. For example, the value may be specified by a wireless communication standard, may be configured by an original equipment manufacturer or the UE, may be indicated in system information, and/or the like.

As shown by reference number <NUM>, the FD UE <NUM> may determine the EPRE for the FD slot based at least in part on the slot being an FD slot and based at least in part on the RRC configuration. For example, the FD UE <NUM> may determine that the FD slot is an FD slot (e.g., based on receiving signaling indicating that the FD slot is an FD slot, based at least in part on information identifying a slot pattern that indicates that the FD slot is an FD slot, and/or the like). Accordingly, the FD UE <NUM> may determine that the EPRE for the FD slot is to be used. For example, the FD UE <NUM> may determine the EPRE for the FD slot based at least in part on the configuration information (e.g., based at least in part on the configuration information explicitly identifying the EPRE for the FD slot or based at least in part on applying an offset or reduction to an EPRE for an HD slot to determine the EPRE for the FD slot).

As shown by reference number <NUM>, the BS <NUM> may use a constant EPRE (e.g., an HD slot EPRE) for the HD UE <NUM>. For example, the BS <NUM> may not modify the HD slot EPRE for a legacy UE, since the legacy UE may not be capable of determining whether a given slot is an HD slot or an FD slot. Thus, the BS <NUM> may use different EPREs for different UEs (e.g., the FD UE <NUM> and the HD UE <NUM>) based at least in part on capabilities of the different UEs. For an example relating to an HD UE <NUM> that can determine whether a slot is an HD slot or an FD slot, refer to <FIG>.

As shown by reference number <NUM>, the BS <NUM> may perform a communication with the FD UE <NUM> and the HD UE <NUM>. The communication may include a single communication to both UEs <NUM> or respective communications for the two UEs. As further shown, the communication may use the FD slot EPRE for the FD UE <NUM> and the constant EPRE (e.g., the HD slot EPRE) For the HD UE <NUM>. The FD UE <NUM> may use the FD slot EPRE to perform the communication. For example, the FD UE <NUM> may identify an EPRE for a received communication based at least in part on a reference signal and the FD slot EPRE, which may identify an offset between a power of the reference signal and a power for the received communication. The FD UE <NUM> may receive or decode the communication based at least in part on the EPRE for the received communication.

Referring now to the HD slot <NUM>, as shown by reference number <NUM>, the FD UE <NUM> may determine an EPRE based at least in part on determining that the HD slot is an HD slot and based at least in part on the RRC configuration. For example, the FD UE <NUM> may determine that the HD slot is an HD slot. The FD UE <NUM> may determine that the reduction is not to be applied to the HD slot EPRE or that the FD slot EPRE is not to be used for the HD slot <NUM>. For example, the FD UE <NUM> may determine this on a slot-to-slot basis or without RRC reconfiguration of the HD slot EPRE and/or the FD slot EPRE.

As shown by reference number <NUM>, the BS <NUM> may use the constant EPRE (e.g., the HD slot EPRE) for the HD UE <NUM> (e.g., the legacy UE <NUM>). As shown by reference number <NUM>, the BS <NUM> may transmit one or more communications to the FD UE <NUM> and the HD UE <NUM> using the HD slot EPRE. Thus, an FD slot EPRE or an HD slot EPRE may be used at a slot-to-slot granularity, thereby enabling slot-to-slot adjustment of the EPRE, reducing interference at the BS <NUM>, and reducing overhead and latency associated with RRC signaling to reconfigure the EPRE.

<FIG> is a diagram illustrating an example <NUM> of determination of EPRE values for a full-duplex slot and/or a half-duplex slot, in accordance with various aspects of the present disclosure. As shown, example <NUM> includes an FD UE <NUM> and a BS <NUM>. The FD UE <NUM> is described in more detail in connection with <FIG>. As further shown, example <NUM> includes an HD UE <NUM>. The HD UE <NUM> of <FIG> may be capable of determining whether a slot is an FD slot or an HD slot (e.g., in a similar fashion as the FD UE <NUM>) while operating in a half-duplex mode.

As shown by reference number <NUM>, the BS <NUM> may provide configuration information (e.g., an RRC configuration and/or the like) to the FD UE <NUM> and/or the HD UE <NUM>. For example, the configuration information may identify the FD slot EPRE and/or the HD slot EPRE, as described in more detail elsewhere herein.

As shown by reference numbers <NUM> and <NUM>, the FD UE <NUM> and the HD UE <NUM> may determine the EPRE for the FD slot. For example, the FD UE <NUM> may determine that the FD slot EPRE is to be used based at least in part on identifying the FD slot as an FD slot. Furthermore, the FD UE <NUM> and the HD UE <NUM> may determine the FD slot EPRE based at least in part on the configuration information shown by reference number <NUM>. Accordingly, the BS <NUM> may communicate with the FD UE <NUM> and/or the HD UE <NUM> in accordance with the FD slot EPRE.

Referring now to the HD slot, as shown by reference numbers <NUM> and <NUM>, the FD UE <NUM> and the HD UE <NUM> may determine the EPRE for the HD slot. For example, the FD UE <NUM> may determine that the HD slot EPRE is to be used based at least in part on identifying the HD slot as an HD slot. Accordingly, as shown by reference number <NUM>, the BS <NUM> may communicate with the FD UE <NUM> and/or the HD UE <NUM> in accordance with the HD slot EPRE.

<FIG> is a diagram illustrating an example <NUM> of determination of EPRE values for a full-duplex slot and/or a half-duplex slot, in accordance with various aspects of the present disclosure. In example <NUM>, the FD slot EPRE is explicitly indicated to the FD UE <NUM> and/or the HD UE <NUM>. For example, as shown by reference number <NUM>, the BS <NUM> may provide an indication of the FD slot EPRE to the FD UE <NUM> and the HD UE <NUM>. In some aspects, the indication may directly identify the FD slot EPRE (e.g., may provide a value to be used as the FD slot EPRE), which provides more flexibility in EPRE configuration than an offset based approach. In some aspects, the indication may identify an offset from an HD slot EPRE (e.g., a ratio or reduction for the FD slot EPRE relative to the HD slot EPRE), which may provide a higher resolution for EPRE configuration than a direct indication based approach. In some aspects, the indication may include, for example, downlink control information (DCI), a medium access control (MAC) control element (CE), and/or the like. As shown by reference number <NUM>, the BS <NUM> may communicate with the FD UE <NUM> and/or the HD UE <NUM> in accordance with the FD slot EPRE.

<FIG> is a diagram illustrating an example <NUM> of determination of EPRE values for a full-duplex slot and/or a half-duplex slot, in accordance with various aspects of the present disclosure. As shown, example <NUM> includes a UE <NUM>. The UE <NUM> may be an FD UE <NUM> or an HD UE <NUM> (e.g., an HD UE <NUM> capable of determining whether a slot is an FD slot or an HD slot). Example <NUM> shows an example relating to determining the FD slot EPRE in the case that an indication or configuration of an updated FD slot EPRE is missed by the UE <NUM>.

As shown by reference number <NUM>, the UE <NUM> may not receive a message indicating a value or an update for the FD slot EPRE. For example, the UE <NUM> may fail to detect the message. Thus, as shown by reference number <NUM>, the UE <NUM> may determine an FD slot EPRE to be used for the FD slot. In some aspects, the UE <NUM> may determine the FD slot EPRE based at least in part on a previous EPRE. For example, the UE <NUM> may use a last (e.g., most recently) signaled FD slot EPRE for the FD slot EPRE of example <NUM>. In some aspects, the UE <NUM> may determine the FD slot EPRE based at least in part on a default value. For example, the BS <NUM> may configure (e.g., using RRC signaling and/or the like) the UE <NUM> with a default FD slot EPRE value to be used if an updated FD slot EPRE is not received for an FD slot. In some aspects, the UE <NUM> may determine the FD slot EPRE based at least in part on a pre-configured value, such as a value specified by a wireless telecommunications standard, an original equipment manufacturer, and/or the like. In this case, as one example, the value may be <NUM> dB, though other values may be used. As shown by reference number <NUM>, the BS <NUM> may communicate with the UE <NUM> based at least in part on the FD slot EPRE. In some aspects, the BS <NUM> may determine the FD slot EPRE used by the UE <NUM> (e.g., based at least in part on receiving a negative acknowledgment regarding the indication or configuration of the FD slot EPRE). In some aspects, the BS <NUM> may transmit a communication to the UE <NUM> without having determined the FD slot EPRE.

<FIG> is a diagram illustrating an example <NUM> of determination of EPRE values for a full-duplex slot and/or a half-duplex slot, in accordance with various aspects of the present disclosure. As shown, example <NUM> includes a UE <NUM>. The UE <NUM> may be an FD UE <NUM> or an HD UE <NUM> (e.g., an HD UE <NUM> capable of determining whether a slot is an FD slot or an HD slot). Example <NUM> shows an example relating to indication of a selected EPRE from a plurality of configured EPRE.

As shown by reference number <NUM>, the BS <NUM> may provide configuration information to the UE <NUM>. As further shown, the configuration information may identify a plurality of EPREs. For example, the configuration information may identify values of the plurality of EPREs, respective offsets for the plurality of EPREs, and/or the like. In some aspects, the configuration information may indicate the EPREs based at least in part on offsets relative to reference signals. For example, the configuration information may indicate an offset relative to an SSB's EPRE, a PDSCH-to-CSI-RS offset, a PDSCH-to-DMRS offset, and/or the like.

In some aspects, the BS <NUM> may use a constant EPRE for an SSB (since the SSB is transmitted to FD UEs and legacy UEs) and the configuration information may identify one or more offsets used to determine EPREs of other communications (e.g., DMRS, PDSCH, NZP-CSI-RS, and/or the like). For example, the configuration information may indicate a table of EPRE offsets from a PDSCH to a DMRS, an FD slot EPRE offset between an NZP-CSI-RS and an SSS, an FD slot EPRE offset between a PDSCH and an NZP-CSI-RS, and/or the like. The configuration information may indicate only FD slot EPREs, only HD slot EPREs, or a combination of one or more FD slot EPREs and one or more HD slot EPREs.

As shown by reference number <NUM>, the UE <NUM> may receive DCI indicating a selected EPRE. For example, the BS <NUM> may dynamically indicate the FD slot EPRE for the FD slot. In some aspects, the DCI may be associated with scheduling a PDSCH on the FD slot. In some aspects, the DCI may be separate from a scheduling DCI for the FD slot. In some aspects, the DCI may pertain to multiple slots and/or multiple UEs. For example, the DCI may indicate respective EPREs for a plurality of slots and/or a plurality of UEs. The indication of the selected EPRE may include one or more bits, where a larger number of bits may be used for a larger set of potential EPREs. As shown by reference number <NUM>, the BS <NUM> may communicate with the UE <NUM> based at least in part on the selected EPRE. By configuring a plurality of EPREs and indicating a selected EPRE, overhead may be reduced relative to explicitly indicating a value of the selected EPRE.

<FIG> is a diagram illustrating a process performed by a UE, in accordance with the invention Process <NUM> is an example where the UE (e.g., UE <NUM>, HD UE <NUM>, FD UE <NUM>, and/or the like) performs operations associated with EPRE determination for sub-band full-duplex communications.

As shown in <FIG>, process <NUM> includes determining an EPRE value for a slot based at least in part on whether the slot is associated with a half-duplex configuration or a full-duplex configuration, wherein the EPRE value is a first value when the slot is associated with the half-duplex configuration and a second value when the slot is associated with the full-duplex configuration (block <NUM>). For example, the UE (e.g., using antenna <NUM>, DEMOD <NUM>, MIMO detector <NUM>, receive processor <NUM>, controller/processor <NUM>, and/or the like) may determine an EPRE value for a slot based at least in part on whether the slot is associated with a half-duplex configuration or a full-duplex configuration, as described above. In some aspects, the EPRE value is a first value (e.g., an HD slot EPRE) when the slot is associated with the half-duplex configuration and a second value (e.g., an FD slot EPRE) when the slot is associated with the full-duplex configuration. In some aspects, the full-duplex configuration may be associated with a base station, such as a base station with which the UE is communicating.

As further shown in <FIG>, process <NUM> includes performing a communication in the slot in accordance with the EPRE value (block <NUM>). For example, the UE (e.g., using antenna <NUM>, DEMOD <NUM>, MIMO detector <NUM>, receive processor <NUM>, controller/processor <NUM>, and/or the like) may perform a communication in the slot in accordance with the EPRE value, as described above.

Process <NUM> may include additional aspects, such as any single aspect or any combination of aspects described in connection with one or more other processes described elsewhere herein.

<FIG> is a diagram illustrating process <NUM> performed by a base station, in accordance with the invention. Process <NUM> is an example where the base station (e.g., BS <NUM> and/or the like) performs operations associated with EPRE determination for SBFD communications.

As shown in <FIG>, process <NUM> includes determining an EPRE value for a slot based at least in part on whether the slot is associated with a half-duplex configuration or a full-duplex configuration, wherein the EPRE value is a first value when the slot is associated with the half-duplex configuration and a second value when the slot is associated with the full-duplex configuration (block <NUM>). For example, the base station (e.g., using controller/processor <NUM> and/or the like) may determine an EPRE value for a slot based at least in part on whether the slot is associated with a half-duplex configuration or a full-duplex configuration, as described above. In some aspects, the EPRE value is a first value when the slot is associated with the half-duplex configuration and a second value when the slot is associated with the full-duplex configuration.

As further shown in <FIG>, process <NUM> includes communicating with a UE in the slot based at least in part on the EPRE value (block <NUM>). For example, the base station may communicate with a UE in the slot based at least in part on the EPRE value, as described above.

Claim 1:
A method (<NUM>) of wireless communication performed by a user equipment, UE, comprising:
determining (<NUM>) an energy per resource element, EPRE, value for a slot based at least in part on whether the slot is associated with a half-duplex configuration or a full-duplex configuration, wherein the EPRE value is a first value when the slot is associated with the half-duplex configuration and a second value when the slot is associated with the full-duplex configuration; and
performing (<NUM>) a communication in the slot in accordance with the EPRE value.