Patent Description:
<CIT> discloses a method for signaling power allocation in a beam-based access system including: determining, by a transmit point (TP), a relative effective transmit power offset between a control beam and a data beam; and signaling, by the TP, the relative effective transmit power offset to a UE.

<CIT> discloses a method for wireless communication by a transmitting entity, comprising: signaling, to a receiving entity, information regarding a relationship between beams used for data and control transmissions to the receiving entity; and sending the data and control transmissions using the beams.

The invention is defined in the independent claims, to which reference should now be made.

In an aspect of the disclosure, a method, and an apparatus are provided for wireless communication at a base station, comprising: transmitting a first transmission using a first directional beam; determining an equivalent isotropic radiated power, EIRP, relationship between the first transmission and a physical downlink shared channel, PDSCH, for a user equipment, UE, wherein the EIRP relationship includes an EIRP ratio between the first transmission and the PDSCH or an EIRP offset between the first transmission and the PDSCH; transmitting, to the UE, an indication of the EIRP relationship between the first transmission and the PDSCH, wherein the indication of the EIRP relationship is transmitted with the first transmission or after the first transmission; and transmitting the PDSCH to the UE using a second directional beam.

In another aspect of the disclosure, a method, and an apparatus are provided for wireless communication at a UE, comprising: receiving a first transmission from a base station; receiving, from the base station, an indication of an equivalent isotropic radiated power, EIRP, relationship between the first transmission and a physical downlink shared channel, PDSCH, wherein the EIRP relationship includes an EIRP ratio between the first transmission and the PDSCH or an EIRP offset between the first transmission and the PDSCH, and wherein the indication of the EIRP relationship is received with the first transmission or after the first transmission; and receiving the PDSCH from the base station using the EIRP relationship.

While aspects and embodiments are described in this application by illustration to some examples, those skilled in the art will understand that additional implementations and use cases may come about in many different arrangements and scenarios. Innovations described herein may be implemented across many differing platform types, devices, systems, shapes, sizes, packaging arrangements. For example, embodiments and/or uses may come about via integrated chip embodiments and other non-module-component based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail/purchasing devices, medical devices, AI-enabled devices, etc.). While some examples may or may not be specifically directed to use cases or applications, a wide assortment of applicability of described innovations may occur. Implementations may range a spectrum from chip-level or modular components to non-modular, non-chip-level implementations and further to aggregate, distributed, or OEM devices or systems incorporating one or more aspects of the described innovations. In some practical settings, devices incorporating described aspects and features may also necessarily include additional components and features for implementation and practice of claimed and described embodiments. For example, transmission and reception of wireless signals necessarily includes a number of components for analog and digital purposes (e.g., hardware components including antenna, RF-chains, power amplifiers, modulators, buffer, processor(s), interleaver, adders/summers, etc.). It is intended that innovations described herein may be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, end-user devices, etc. of varying sizes, shapes, and constitution.

The access network <NUM> may include one or more base stations <NUM> or <NUM> and one or more UEs <NUM>. The base station base station <NUM>/<NUM> may utilize beamforming <NUM> with the UE <NUM>, e.g., to compensate for the extremely high path loss and short range.

Some physical channels, such as a channel comprising SSB, TRS, CSI-RS, etc., may be transmitted by a base station <NUM>/<NUM> using broader spatial beams, whereas data (e.g., a physical downlink shared channel) may be transmitted using a narrower beam to improve spectral efficiency. The difference in the beams may lead to a mismatch between the received power that the UE <NUM> observes on different channels. The power difference may lead to challenges for receiver control loops at the UE when there are beam changes at the base station <NUM>/<NUM>.

Aspects presented herein improve automatic gain control convergence and/or channel estimation for the UE <NUM> through signaling from the base station <NUM>/<NUM> that indicates an EIRP relationship between a first downlink transmission and a PDSCH for the UE <NUM>.

In some examples, a base station <NUM> or <NUM> may include an EIRP indication component <NUM> configured to determine an EIRP relationship between a first downlink transmission and a PDSCH for a UE <NUM>. The EIRP indication component <NUM> may be configured to transmit, to the UE <NUM>, an indication of the EIRP relationship between the first transmission and the PDSCH. Then, the base station <NUM> or <NUM> may transmit the PDSCH to the UE using the second directional beam. The UE <NUM> may include an EIRP indication reception component <NUM> configured to receive, from the base station <NUM> or <NUM>, an indication of an EIRP relationship between the first transmission and a PDSCH. The EIRP indication reception component <NUM> may be configured to receive the PDSCH from the base station <NUM> or <NUM> over a second directional beam using the received EIRP relationship. For example, the UE <NUM> may perform automatic gain control to receive the PDSCH using the EIRP relationship indicated by the base station <NUM> or <NUM>. In another example, the UE <NUM> may perform channel estimation to receive the PDSCH using the EIRP relationship indicated by the base station.

The third backhaul links <NUM> may be wired or wireless.

Some base stations <NUM>, such as a gNB, may operate in a traditional sub <NUM> spectrum, in millimeter wave (mmW) frequencies, and/or near mmW frequencies in communication with the UE <NUM>. When the base station <NUM> operates in mmW or near mmW frequencies, the base station <NUM> may be referred to as an mmW base station. Communications using the mmW / near mmW radio frequency (RF) band (e.g., <NUM> - <NUM>) has extremely high path loss and a short range. The electromagnetic spectrum is often subdivided by various authors or entities into different classes, bands, channels, or the like, based on frequency/wavelength. For example, in <NUM> NR two initial operating bands have been identified as frequency range designations FR1 (<NUM>-<NUM>) and FR2 (<NUM> - <NUM>). Even though a portion of FR1 is greater than <NUM> (> <NUM>), FR1 is often referred to (interchangeably) as a Sub-<NUM> band in various documents and articles regarding <NUM> NR topics. A similar nomenclature issue sometimes occurs with regard to FR2 in various documents and articles regarding <NUM> NR topics. While a portion of FR2 is less than <NUM> (< <NUM>), FR2 is often referred to (interchangeably) as a millimeter wave band. However, some authors/entities tend to define wireless signals with wavelengths between <NUM>-<NUM> millimeters as falling within a millimeter wave band (<NUM> - <NUM>).

With the above examples in mind, unless specifically stated otherwise, the term "sub-<NUM>" if used herein by way of example may represent all or part of FR1 for <NUM> NR. Further, unless specifically stated otherwise, the term "millimeter wave" as used herein by way of example may represent all or part of FR2 for <NUM> NR and/or all or part of a <NUM>-<NUM> waveband.

The above examples are not necessarily intended to limit claimed subject matter. For example, unless specifically recited, claimed subject matter relating to wireless communications is not necessarily intended to be limited to any particular author/entity defined frequency band, or the like.

The mmW base station <NUM> may utilize beamforming <NUM> with the UE <NUM>, as described above to compensate for the extremely high path loss and short range.

The <NUM>/NR frame structure may be frequency division duplexed (FDD) in which for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated for either DL or UL, or may be time division duplexed (TDD) in which for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated for both DL and UL.

<FIG> provide an example of slot configuration <NUM> with <NUM> symbols per slot and numerology µ=<NUM> with <NUM> slots per subframe. The slot duration is <NUM>, the subcarrier spacing is <NUM>, and the symbol duration is approximately <NUM>.

As described in connection with <FIG>, wireless devices may use antenna arrays in order to transmit directional beams, e.g., for FR1. In some examples, a base station may use a large antenna array to transmit and/or receive communication with a UE using directional beams (e.g., <NUM>' described in connection with <FIG>) Analog beams may be used to exchange communication in FR2.

Common physical channels (such as a channel used to transmit CSI-RS, SSB, TRS, etc.) may be transmitted with broad spatial beams, whereas data (e.g., PDSCH) may be transmitted using a narrower, more concentrated beam, e.g., in order to increase spectral efficiency. A common physical channel may refer to a channel that is transmitted in common to more than one UE. <FIG> illustrates an example communication system <NUM> including a base station <NUM> and a UE <NUM>. <FIG> illustrates a broader beam <NUM> used to transmit SSB/TRS than the beam <NUM> used to transmit PDSCH to the UE <NUM>. As well, <FIG> illustrates a broader beam <NUM> used to transmit CSI-RS from the base station <NUM> as compared to the narrower beam <NUM> used to transmit the PDSCH to the UE <NUM>.

The difference between the beam used for downlink transmissions may lead to a mismatch (or difference) between the received power that the UE <NUM> observes on different channels. For example, the UE may receive the SSB/TRS having a different received power than the PDSCH in <FIG>. Similarly, the UE may receive the CSI-RS in <FIG> with a different received power than the PDSCH.

The power difference may create a challenge for the receiver control loops at the UE <NUM>. For example, the automatic gain control (AGC), channel estimation, and/or demodulation reference signal (DMRS) estimation parameters (including delay spread, etc.) may be affected by the power difference between the different downlink transmissions and may reduce reception performance for the UE. The base station <NUM> may dynamically change the beam used to transmit PDSCH, and the effect may be increased when the base station <NUM> performs rapid changes of the beam order used for downlink transmissions. The base station <NUM> may also dynamically change the transmission power used to transmit downlink signals that are received by the UE <NUM>.

As an example, AGC may use a history of reception information at the UE to receive the PDSCH. However, such AGC may rely on a pilot signal and a data signal having similar behavior. AGC may be inaccurate when a downlink signal on a beam, such as beam <NUM> or <NUM>, is used to receive PDSCH on beam <NUM>.

The UE <NUM> may rely on measurements of the beam imbalance, e.g., between the beam <NUM> and the beam <NUM> and/or the beam <NUM>, to receive the PDSCH. However, the use of beam imbalance measurements may suffer from instability in transient use cases, e.g., when the base station changes beams, when the UE wakes up, etc..

In order to overcome the instability, the UE may consider the number of configured ports as an initial EIRP offset value. However, such an initial EIRP value may be relevant to the CSI-RS but not to other signals or other channels. The base station may dynamically change transmission power between different downlink transmissions. As an example, the UE may be aware of a transmission power difference between CSI-RS and PDSCH transmissions. The UE may provide feedback about the CSI-RS that is used by the base station <NUM> to determine precoding, spectral efficiency, etc. in connection with a PDSCH transmission for the UE <NUM>. The SSB or the TRS transmitted by the base station <NUM> may have a wider beam than the CSI-RS ports so that the gain may be much higher. The higher gain may lead to errors in receiving the PDSCH signal. Even with periodic CSI-RS, the maximum beam gain could lead to throughput limitations due to an AGC noise floor.

In order to improve PDSCH reception at the UE <NUM>, aspects presented herein provide for signaling from the base station to the UE that indicates an expected EIRP power ratio between a first downlink transmission and a PDSCH transmission for the UE. <FIG> illustrates an example communication flow <NUM> between a base station <NUM> and a UE <NUM> that includes signaling a EIRP relationship information to the UE <NUM> that enables the UE <NUM> to better receive a PDSCH from the base station <NUM>.

The base station <NUM> may transmit a first downlink transmission <NUM> to the UE using a first spatial direction (e.g., a first beam). The first transmission <NUM> may comprise an SSB. The first transmission <NUM> may comprise a TRS. The first transmission <NUM> may comprise a CSI-RS. The first transmission <NUM> may comprise a first PDSCH.

At <NUM>, the base station <NUM> transmits an indication <NUM> of an EIRP relationship between the first transmission <NUM> and a PDSCH <NUM> to the UE <NUM>. Prior to transmitting the indication <NUM>, the base station <NUM> determines an EIRP relationship between the first transmission <NUM> and the PDSCH <NUM>. The base station <NUM> may determine an antenna gain value for the UE <NUM> for reception of the PDSCH, at <NUM>.

The EIRP relationship, indicated at <NUM>, may be determined based, at least in part, on the antenna gain value of the base station (e.g., the antenna gain for the base station used for the transmission for the UE). For example, the EIRP relationship may be determined based on the antenna gain value, a first transmission power for the first transmission, and a second transmission power for the PDSCH. The base station <NUM> may determine the antenna gain value based on a precoding selected for the PDSCH. The base station <NUM> may determine the antenna gain value based on an antenna beam pattern used in a transmission for the UE <NUM>. The base station <NUM> may determine the antenna gain value based on uplink channel measurements for communication from the UE <NUM>. The base station <NUM> may determine the antenna gain value based on an estimated pathloss for the UE <NUM>. The base station <NUM> may determine the antenna gain value based on a combination of precoding, antenna beam pattern, uplink channel measurements, and/or estimated pathloss.

For example, the base station <NUM> may indicate an EIRP relationship between an SSB and a PDSCH for the UE. As another example, the base station may indicate an EIRP relationship between a CSI-RS and a PDSCH for the UE. As another example, the base station may indicate an EIRP relationship between a TRS and a PDSCH for the UE. In another example, the base station may signal a change in an EIRP relative to a previous PDSCH transmission (e.g., an EIRP power ratio between the PDSCH transmission and a previous PDSCH transmission). The EIRP relationship between the two signals may be based on a combination of a transmission power ratio between the two signals (e.g., a "power offset" between the two downlink signals) and an antenna gain for the downlink transmission of the PDSCH <NUM> to the UE <NUM>. The EIRP may take into consideration the base station's antenna beam pattern and the selected precoding for the signals. A nominal power offset may be used between beams, e.g., between the SSB and the PDSCH or between the CSI-RS and the PDSCH. A maximum power offset may be used between beams, e.g., between the SSB and the PDSCH or between the CSI-RS and the PDSCH. As an example, the base station <NUM> may indicate a nominal EIRP relationship between the first transmission <NUM> and the PDSCH <NUM>. The base station <NUM> may indicate a maximum EIRP relationship between the first transmission <NUM> and the PDSCH <NUM>.

The base station <NUM> may transmit the indication <NUM> to the UE in any of a number of ways. The base station <NUM> may signal the power offset/power ratio to the UE <NUM> in DCI, such as including it in the TCI state for the PDSCH. Alternately, the base station <NUM> may signal the power offset/power ratio to the UE <NUM> in RRC signaling, e.g., such as signaling maximum EIPR values. In another example, the base station <NUM> may signal the EIRP relationship to the UE <NUM> using a combination of RRC signaling and DCI. For example, the DCI may dynamically indicate an actual EIRP relationship with reference to an index or other parameter indicated in RRC signaling. In another example, the base station <NUM> may signal the power offset/power ratio to the UE <NUM> as part of the data payload in an earlier PDSCH <NUM>. For example, the indication <NUM> may indicate that the EIRP relationship applies to the PDSCH <NUM> and future PDSCH. The indication may indicate a time, or a time offset, from which the EIRP relationship applies to PDSCH transmissions for the UE <NUM>, because AGC parameters may already be set for the current PDSCH <NUM>. Thus, the EIRP relationship may provide information that the UE <NUM> uses to decode data in a next slot.

As illustrated at <NUM>, the base station <NUM> transmits the PDSCH to the UE <NUM> using a second directional beam (e.g., a second spatial direction). The second directional beam may be different than the first directional beam. As illustrated in <FIG>, the second directional beam may be wider than a first directional beam. For example, the base station <NUM> may transmit the first transmission <NUM> and the PDSCH <NUM> in FR1, and the first directional beam may be wider than the second directional beam, e.g., as illustrated in <FIG>.

In an example, the first transmission <NUM> may comprise an SSB, and the EIRP relationship indicated at <NUM> may include an EIRP ratio between the SSB and the PDSCH <NUM> and/or an EIRP offset between the SSB and the PDSCH <NUM>.

In another example, the first transmission <NUM> may comprise a TRS, and the EIRP relationship indicated at <NUM> may include an EIRP ratio between the TRS and the PDSCH <NUM> or an EIRP offset between the TRS and the PDSCH <NUM>.

In another example, the first transmission <NUM> may comprise a prior PDSCH transmission, and the EIRP relationship indicated at <NUM> may include an EIRP ratio between the prior PDSCH transmission and the PDSCH <NUM> or an EIRP offset between the prior PDSCH transmission and the PDSCH <NUM>. In this case the EIRP signaling <NUM> could be part of the PDSCH payload. Thus, although the indication <NUM> of the EIRP relationship is illustrated with a separate line than the first downlink transmission <NUM> (e.g., PDSCH), in some examples, the indication <NUM> may be comprised in, or otherwise transmitted together with, the first downlink transmission <NUM> (e.g., in a prior PDSCH).

In another example, the first transmission <NUM> may comprise a CSI-RS, and the EIRP relationship may include an EIRP ratio between the CSI-RS and the PDSCH <NUM> or an EIRP offset between the CSI-RS and the PDSCH <NUM>.

The UE <NUM> may use the indication <NUM> of the EIRP relationship to receive the PDSCH <NUM>. As an example, as illustrated at <NUM>, the UE <NUM> may perform automatic gain control to receive the PDSCH <NUM> using the EIRP relationship indicated by the base station <NUM>. As another example, as illustrated at <NUM>, the UE <NUM> may perform channel estimation to receive the PDSCH <NUM> using the EIRP relationship indicated by the base station <NUM>.

<FIG> is a flowchart <NUM> of a method of wireless communication. The method may be performed by a base station or a component of a base station (e.g., the base station <NUM>, <NUM>, <NUM>, <NUM>, <NUM>; the apparatus <NUM>/<NUM>'; the processing system <NUM>, which may include the memory <NUM> and which may be the entire base station <NUM> or a component of the base station <NUM>, such as the TX processor <NUM>, the RX processor <NUM>, and/or the controller/processor <NUM>). Optional aspects are illustrated with a dashed line. The method may help the base station to assist the UE in receive PDSCH.

At <NUM>, the base station transmits a first transmission using a first directional beam. The first transmission may correspond, e.g., to the first downlink transmission <NUM> in <FIG>. The first transmission may include an SSB. The first transmission may include a TRS. The first transmission may include CSI-RS. The first transmission may include a first PDSCH. The first transmission may use a different beam that a PDSCH transmission, e.g., as described in connection with <FIG>.

At <NUM>, the base station determines an EIRP relationship between the first transmission and a PDSCH for a UE. The EIRP relationship may include a dynamic EIRP ratio between the first transmission and the PDSCH that is indicated in DCI. The EIRP relationship may include a dynamic EIRP ratio between the first transmission and the PDSCH that is indicated in a payload of a previous PDSCH. For example, the EIRP relationship may indicate that starting from a time or from a time offset, that the base station will change the EIRP ratio to the indicated value for PDSCH transmission. The EIRP relationship may include a maximum EIRP ratio between the first transmission and the PDSCH or a maximum EIRP offset between the first transmission and the PDSCH. The EIRP relationship may be indicated to the UE in a RRC message.

As illustrated at <NUM>, the base station may determine an antenna gain value for the transmission of the PDSCH to the UE. The EIRP relationship may be determined at <NUM> based, at least in part, on the antenna gain value of the base station (e.g., the antenna gain for the base station used for the transmission for the UE). For example, the EIRP relationship may be determined based on the antenna gain value, a first transmission power for the first transmission, and a second transmission power for the PDSCH. The base station may determine the antenna gain value based on a precoding selected for the PDSCH. The base station may determine the antenna gain value based on an antenna beam pattern used in a transmission for the UE. The base station may determine the antenna gain value based on uplink channel measurements for communication from the UE. The base station may determine the antenna gain value based on an estimated pathloss for the UE. The base station may determine the antenna gain value based on a combination of precoding, antenna beam pattern, uplink channel measurements, and/or estimated pathloss.

At <NUM>, the base station transmits, to the UE, an indication of the EIRP relationship between the first transmission and the PDSCH. <FIG> illustrates an example of a base station <NUM> transmitting an indication <NUM> of the EIRP relationship to the UE <NUM>. The EIRP relationship may be indicated to the UE in RRC signaling. The EIRP relationship may include a dynamic value that is indicated to the UE in DCI. The base station may provide the indication of the EIRP relationship between the first transmission and the PDSCH that enables the UE to set automatic gain control based on the indication of the EIRP relationship.

At <NUM>, the base station transmits the PDSCH to the UE using a second directional beam. The first transmission and the PDSCH may be transmitted in FR1, and the first directional beam may be wider than the second directional beam, e.g., as illustrated in the example in <FIG>.

In an example, the first transmission may comprise an SSB, and the EIRP relationship indicated at <NUM> may include an EIRP ratio between the SSB and the PDSCH and/or an EIRP offset between the SSB and the PDSCH.

In another example, the first transmission may comprise a TRS, and the EIRP relationship may include an EIRP ratio between the TRS and the PDSCH or an EIRP offset between the TRS and the PDSCH.

In another example, the first transmission may comprise a prior PDSCH transmission, and the EIRP relationship includes an EIRP ratio between the prior PDSCH transmission and the PDSCH or an EIRP offset between the prior PDSCH transmission and the PDSCH.

In another example, the first transmission may comprise a CSI-RS, and the EIRP relationship may include an EIRP ratio between the CSI-RS and the PDSCH or an EIRP offset between the CSI-RS and the PDSCH.

<FIG> is a conceptual data flow diagram <NUM> illustrating the data flow between different means/components in an example apparatus <NUM>. The apparatus may be a base station or a component of a base station. The apparatus includes a reception component <NUM> that receives uplink communication from the UE <NUM> and a transmission component <NUM> that transmits downlink communication to the UE <NUM>. The apparatus includes a first transmission component <NUM> configured to transmit a first transmission using a first directional beam (e.g., as described in connection with <NUM> in <FIG>). The apparatus may include an EIRP component <NUM> configured to determine an EIRP relationship between the first transmission and a PDSCH for a UE (e.g., as described in connection with <NUM> in <FIG>). The EIRP component <NUM> and/or the transmission component <NUM> may be configured to transmit, to the UE, an indication of the EIRP relationship between the first transmission and the PDSCH (e.g., as described in connection with <NUM> in <FIG>). The apparatus may include a PDSCH component <NUM> configured to transmit the PDSCH to the UE using a second directional beam, e.g., via the transmission component <NUM> (e.g., as described in connection with <NUM> in <FIG>). The apparatus may include an antenna gain component <NUM> configured to determine an antenna gain value for the UE for reception of the PDSCH, where the EIRP relationship is determined based on the antenna gain value of the base station, a first transmission power for the first transmission, and a second transmission power for the PDSCH (e.g., as described in connection with <NUM> in <FIG>).

The apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowchart of <FIG>, and the aspects performed by the base station in <FIG>. As such, each block in the aforementioned flowchart of <FIG>, and the aspects performed by the base station in <FIG>, may be performed by a component and the apparatus may include one or more of those components.

<FIG> is a diagram <NUM> illustrating an example of a hardware implementation for an apparatus <NUM>' employing a processing system <NUM>. The processing system <NUM> may be implemented with a bus architecture, represented generally by the bus <NUM>. The bus <NUM> may include any number of interconnecting buses and bridges depending on the specific application of the processing system <NUM> and the overall design constraints. The bus <NUM> links together various circuits including one or more processors and/or hardware components, represented by the processor <NUM>, the components <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, and the computer-readable medium / memory <NUM>. The bus <NUM> may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.

The processing system <NUM> may be coupled to a transceiver <NUM>. The transceiver <NUM> is coupled to one or more antennas <NUM>. The transceiver <NUM> provides a means for communicating with various other apparatus over a transmission medium. The transceiver <NUM> receives a signal from the one or more antennas <NUM>, extracts information from the received signal, and provides the extracted information to the processing system <NUM>, specifically the reception component <NUM>. In addition, the transceiver <NUM> receives information from the processing system <NUM>, specifically the transmission component <NUM>, and based on the received information, generates a signal to be applied to the one or more antennas <NUM>. The processing system <NUM> includes a processor <NUM> coupled to a computer-readable medium / memory <NUM>. The processor <NUM> is responsible for general processing, including the execution of software stored on the computer-readable medium / memory <NUM>. The software, when executed by the processor <NUM>, causes the processing system <NUM> to perform the various functions described supra for any particular apparatus. The computer-readable medium / memory <NUM> may also be used for storing data that is manipulated by the processor <NUM> when executing software. The processing system <NUM> further includes at least one of the components <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>. The components may be software components running in the processor <NUM>, resident/stored in the computer readable medium / memory <NUM>, one or more hardware components coupled to the processor <NUM>, or some combination thereof. The processing system <NUM> may be a component of the base station <NUM> and may include the memory <NUM> and/or at least one of the TX processor <NUM>, the RX processor <NUM>, and the controller/processor <NUM>. Alternatively, the processing system <NUM> may be the entire base station (e.g., see <NUM> of <FIG>).

In one configuration, the apparatus <NUM>/<NUM>' for wireless communication includes means for transmitting a first transmission using a first directional beam (e.g., the transmission component <NUM> and/or the first transmission component <NUM>). The apparatus <NUM>/<NUM>' may include means for determining an EIRP relationship between the first transmission and a PDSCH for a UE (e.g., the EIRP component <NUM>). The apparatus <NUM>/<NUM>' may include means for transmitting, to the UE, an indication of the EIRP relationship between the first transmission and the PDSCH (e.g., the EIRP component <NUM> and/or transmission component <NUM>). The apparatus <NUM>/<NUM>' may include means for transmitting the PDSCH to the UE using a second directional beam (e.g., the PDSCH component <NUM> and/or the transmission component <NUM>). The apparatus <NUM>/<NUM>' may include means for determining an antenna gain value for the UE for reception of the PDSCH, where the EIRP relationship is determined based on the antenna gain value of the base station, a first transmission power for the first transmission, and a second transmission power for the PDSCH (e.g., the antenna gain component <NUM>).

<FIG> is a flowchart <NUM> of a method of wireless communication. The method may be performed by a UE or a component of a UE (e.g., the UE <NUM>, <NUM>, <NUM>, <NUM>; the apparatus <NUM>/<NUM>'; the processing system <NUM>, which may include the memory <NUM> and which may be the entire UE <NUM> or a component of the UE <NUM>, such as the TX processor <NUM>, the RX processor <NUM>, and/or the controller/processor <NUM>).

At <NUM>, the UE receives a first transmission from a base station over a first directional beam. The first transmission may correspond, e.g., to the first downlink transmission <NUM> in <FIG>. The first transmission may include an SSB. The first transmission may include a TRS. The first transmission may include CSI-RS. The first transmission may include a first PDSCH.

At <NUM>, the UE receives, from the base station, an indication of an EIRP relationship between the first transmission and a PDSCH. The EIRP relationship may include a dynamic EIRP ratio between the first transmission and the PDSCH that is received in DCI. The EIRP relationship may include a dynamic EIRP ratio between the first transmission and the PDSCH that is received in a payload of a previous PDSCH. The EIRP relationship may include a maximum EIRP ratio between the first transmission and the PDSCH or a maximum EIRP offset between the first transmission and the PDSCH that is received in a RRC message.

The EIRP relationship may be based on an antenna gain value of the base station used for transmission to the UE, a first transmission power for the first transmission and a second transmission power for the PDSCH, e.g., as described in connection with <NUM> and <NUM> of <FIG>, and as described in connection with <FIG>. The EIRP relationship may be based, at least in part, on the antenna gain value of the base station (e.g., the antenna gain for the base station used for the transmission for the UE). For example, the EIRP relationship may be based on the antenna gain value, a first transmission power for the first transmission, and a second transmission power for the PDSCH. For example, the base station may determine the antenna gain value based on a precoding selected for the PDSCH. The base station may determine the antenna gain value based on an antenna beam pattern used in a transmission for the UE. The base station may determine the antenna gain value based on uplink channel measurements for communication from the UE. The base station may determine the antenna gain value based on an estimated pathloss for the UE. The base station may determine the antenna gain value based on a combination of precoding, antenna beam pattern, uplink channel measurements, and/or estimated pathloss.

At <NUM>, the UE receives the PDSCH from the base station over a second directional beam using the EIRP relationship. The PDSCH transmission may correspond, e.g., to the PDSCH transmission <NUM> in <FIG>. The first transmission and the PDSCH may be received in FR1, and the first directional beam may be wider than the second directional beam, e.g., as described in connection with <FIG>. As an example, as illustrated at <NUM>, the UE may perform automatic gain control to receive the PDSCH using the EIRP relationship indicated by the base station. For example, the UE may set the automatic gain control based on the EIRP relationship indicated by the base station. As another example, as illustrated at <NUM>, the UE may perform channel estimation to receive the PDSCH using the EIRP relationship indicated by the base station.

In another example, the first transmission may comprise a prior PDSCH transmission, and the EIRP relationship may include an EIRP ratio between the prior PDSCH transmission and a future PDSCH or an EIRP offset between the prior PDSCH transmission and a future PDSCH transmission.

<FIG> is a conceptual data flow diagram <NUM> illustrating the data flow between different means/components in an example apparatus <NUM>. The apparatus may be a UE or a component of a UE. The apparatus includes a reception component <NUM> that receives downlink communication from the base station <NUM> and a transmission component <NUM> that transmits uplink communication to the base station <NUM>. The apparatus includes a first transmission component <NUM> configured to receive a first transmission from a base station over a first directional beam (e.g., as described in connection with <NUM> in <FIG>). The apparatus includes an EIRP component <NUM> configured to receive, from the base station, an indication of an EIRP relationship between the first transmission and a PDSCH (e.g., as described in connection with <NUM> in <FIG>). The apparatus includes a PDSCH component <NUM> configured to receive the PDSCH from the base station over a second directional beam using the EIRP relationship (e.g., as described in connection with <NUM> in <FIG>). The apparatus may include an AGC component <NUM> perform automatic gain control to receive the PDSCH using the EIRP relationship indicated by the base station (e.g., as described in connection with <NUM> in <FIG>). The apparatus may include a channel estimation component <NUM> configured to perform channel estimation to receive the PDSCH using the EIRP relationship indicated by the base station (e.g., as described in connection with <NUM> in <FIG>).

The apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowchart of <FIG>, and the aspects performed by UE <NUM> in <FIG>. As such, each block in the aforementioned flowchart of <FIG>, and the aspects performed by UE <NUM> in <FIG>, may be performed by a component and the apparatus may include one or more of those components.

The processing system <NUM> may be coupled to a transceiver <NUM>. The transceiver <NUM> is coupled to one or more antennas <NUM>. The transceiver <NUM> provides a means for communicating with various other apparatus over a transmission medium. The transceiver <NUM> receives a signal from the one or more antennas <NUM>, extracts information from the received signal, and provides the extracted information to the processing system <NUM>, specifically the reception component <NUM>. In addition, the transceiver <NUM> receives information from the processing system <NUM>, specifically the transmission component <NUM>, and based on the received information, generates a signal to be applied to the one or more antennas <NUM>. The processing system <NUM> includes a processor <NUM> coupled to a computer-readable medium / memory <NUM>. The processor <NUM> is responsible for general processing, including the execution of software stored on the computer-readable medium / memory <NUM>. The software, when executed by the processor <NUM>, causes the processing system <NUM> to perform the various functions described supra for any particular apparatus. The computer-readable medium / memory <NUM> may also be used for storing data that is manipulated by the processor <NUM> when executing software. The processing system <NUM> further includes at least one of the components <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>. The components may be software components running in the processor <NUM>, resident/stored in the computer readable medium / memory <NUM>, one or more hardware components coupled to the processor <NUM>, or some combination thereof. The processing system <NUM> may be a component of the UE <NUM> and may include the memory <NUM> and/or at least one of the TX processor <NUM>, the RX processor <NUM>, and the controller/processor <NUM>. Alternatively, the processing system <NUM> may be the entire UE (e.g., see <NUM> of <FIG>).

In one configuration, the apparatus <NUM>/<NUM>' for wireless communication includes means for receiving a first transmission from a base station over a first directional beam (e.g., the reception component <NUM> and/or the first transmission component <NUM>). The apparatus <NUM>/<NUM>' may include means for receiving, from the base station, an indication of an EIRP relationship between the first transmission and a PDSCH (e.g., the reception component <NUM> and/or the EIRP component <NUM>). The apparatus <NUM>/<NUM>' may include means for receiving the PDSCH from the base station over a second directional beam using the EIRP relationship (e.g., the reception component <NUM> and/or the PDSCH component <NUM>). The apparatus <NUM>/<NUM>' may include means for performing automatic gain control to receive the PDSCH using the EIRP relationship indicated by the base station (e.g., the AGC component <NUM>). The apparatus <NUM>/<NUM>' may include means for performing channel estimation to receive the PDSCH using the EIRP relationship indicated by the base station (e.g., the channel estimation component <NUM>).

Claim 1:
A method of wireless communication at a base station, the method comprising:
transmitting (<NUM>) a first transmission using a first directional beam;
determining (<NUM>) an equivalent isotropic radiated power, EIRP, relationship between the first transmission and a physical downlink shared channel, PDSCH, for a user equipment, UE, wherein the EIRP relationship includes an EIRP ratio between the first transmission and the PDSCH or an EIRP offset between the first transmission and the PDSCH;
transmitting (<NUM>), to the UE, an indication of the EIRP relationship between the first transmission and the PDSCH, wherein the indication of the EIRP relationship is transmitted with the first transmission or after the first transmission; and
transmitting (<NUM>) the PDSCH to the UE using a second directional beam.