Techniques for power headroom reporting in uplink dense deployments
By allowing a UE to conditionally report both PUSCH and SRS power headroom values in power headroom reports, the solution addresses inaccuracies in uplink transmit power control, enhancing reliability and efficiency in asymmetric wireless communication systems.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2026-04-02
AI Technical Summary
In wireless communication systems with asymmetric downlink and uplink nodes, existing power headroom reporting methods fail to accurately account for differing pathlosses between downlink and uplink transmissions, leading to inefficient and inaccurate uplink transmit power control.
A user equipment (UE) is enabled to selectively or conditionally include both a first power headroom value for physical uplink shared channel (PUSCH) and a second power headroom value for sounding reference signal (SRS) transmissions in a power headroom report (PHR), based on criteria such as pathloss offset and resource allocation, to align reporting expectations with the network entity.
This approach enhances the accuracy and efficiency of uplink transmit power control, reducing misinterpretations and improving reliability, thereby increasing data rates, system capacity, and spectral efficiency in uplink dense deployments.
Smart Images

Figure CN2024122179_02042026_PF_FP_ABST
Abstract
Description
TECHNIQUES FOR POWER HEADROOM REPORTING IN UPLINK DENSE DEPLOYMENTS
[0001] FIELD OF DISCLOSURE
[0002] The following relates to wireless communication, including techniques for power headroom reporting in uplink dense deployments.BACKGROUND
[0003] Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) . Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA) , time division multiple access (TDMA) , frequency division multiple access (FDMA) , orthogonal FDMA (OFDMA) , or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) . A wireless multiple-access communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE) .
[0004] A UE may support an uplink transmit power control procedure according to which the UE may calculate or determine a transmit power for one or more uplink transmissions. In some systems, the UE may use a different uplink transmit power control procedure for different types of transmissions. For example, a UE may use a first uplink transmit power control procedure for physical uplink shared channel (PUSCH) transmissions, a second uplink transmit power control procedure for physical uplink control channel (PUCCH) transmissions, and a third uplink transmit power control procedure for sounding reference signal (SRS) transmissions.SUMMARY
[0005] The systems, methods, and devices of this disclosure each have several innovative aspects, no single one of which is solely responsible for the desirable attributes disclosed herein.
[0006] A method for wireless communications by a user equipment (UE) is described. The method may include receiving first information indicative of an uplink shared channel resource allocation associated with a serving cell of the UE, receiving second information indicative of a transmission configuration indicator (TCI) state associated with the serving cell, where the TCI state is associated with a pathloss offset, and transmitting a power headroom report (PHR) based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus a sounding reference signal (SRS) transmit power associated with the serving cell.
[0007] A UE for wireless communications is described. The UE may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories. The one or more processors may individually or collectively be operable to execute the code to cause the UE to receive first information indicative of an uplink shared channel resource allocation associated with a serving cell of the UE, receive second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset, and transmit a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0008] Another UE for wireless communications is described. The UE may include means for receiving first information indicative of an uplink shared channel resource allocation associated with a serving cell of the UE, means for receiving second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset, and means for transmitting a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0009] A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by one or more processors to receive first information indicative of an uplink shared channel resource allocation associated with a serving cell of the UE, receive second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset, and transmit a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0010] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the uplink shared channel transmit power may be associated with a reference uplink shared channel transmission and the SRS transmit power may be associated with a reference SRS transmission and the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the reference uplink shared channel transmission.
[0011] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the uplink shared channel transmit power may be associated with a reference uplink shared channel transmission and the SRS transmit power may be associated with a reference SRS transmission and the criterion indicates that the UE includes the second power headroom value in the PHR in accordance with the SRS transmit power being associated with the reference SRS transmission.
[0012] Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving control signaling indicative of whether to include the first power headroom value or the second power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with a reference uplink shared channel transmission and the SRS transmit power being associated with a reference SRS transmission, where the criterion may be associated with the control signaling indicating whether to include the first power headroom value or the second power headroom value in the PHR.
[0013] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the uplink shared channel transmit power may be associated with a reference uplink shared channel transmission and the SRS transmit power may be associated with an actual SRS transmission and the criterion indicates that the UE includes the second power headroom value in the PHR in accordance with the SRS transmit power being associated with the actual SRS transmission.
[0014] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the uplink shared channel transmit power may be associated with an actual uplink shared channel transmission and the SRS transmit power may be associated with a reference SRS transmission and the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the actual uplink shared channel transmission.
[0015] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the uplink shared channel transmit power may be associated with an actual uplink shared channel transmission and the SRS transmit power may be associated with an actual SRS transmission and the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the actual uplink shared channel transmission.
[0016] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the uplink shared channel transmit power may be associated with an actual uplink shared channel transmission and the SRS transmit power may be associated with an actual SRS transmission and the criterion indicates that the UE includes the second power headroom value in the PHR in accordance the SRS transmit power being associated with the actual SRS transmission.
[0017] Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving control signaling indicative of whether to include the first power headroom value or the second power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with an actual uplink shared channel transmission and the SRS transmit power being associated with an actual SRS transmission, where the criterion may be associated with the control signaling indicating whether to include the first power headroom value or the second power headroom value in the PHR.
[0018] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the criterion indicates that the UE includes both the first power headroom value and the second power headroom value in the PHR in accordance with the first power headroom value and the second power headroom value being available for transmission.
[0019] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the criterion indicates that the UE includes both the first power headroom value and the second power headroom value in the PHR in accordance with the TCI state being associated with the pathloss offset; or excludes the second power headroom value from the PHR in accordance with the TCI state not being associated with the pathloss offset.
[0020] Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting a message indicative of a capability of the UE associated with including one or both of the first power headroom value and the second power headroom value in the PHR, where transmission of the PHR may be in accordance with the capability of the UE, and where the criterion may be a first criterion in accordance with the capability of the UE indicating that the UE may be capable of including both of the first power headroom value and the second power headroom value in the PHR or the criterion may be a second criterion in accordance with the capability of the UE indicating that the UE may be incapable of including both of the first power headroom value and the second power headroom value in the PHR.
[0021] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the PHR includes an indication of whether the PHR includes the first power headroom value or the second power headroom value.
[0022] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, a first value of the indication indicates that the PHR includes the first power headroom value and a second value of the indication indicates that the PHR includes the second power headroom value.
[0023] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, a first value of the indication indicates that the PHR includes the first power headroom value and a second value of the indication indicates that the PHR includes the first power headroom value and the second power headroom value.
[0024] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the PHR includes a field associated with the serving cell of the UE and the field includes the indication.
[0025] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the PHR includes a field associated with a set of multiple serving cells of the UE including the serving cell and the field includes the indication.
[0026] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the PHR includes a reserved bit and the reserved bit may be interpreted as the indication in accordance with the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset.
[0027] Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving control signaling associated with the serving cell of the UE, where the serving cell of the UE may be a primary cell (PCell) , where the control signaling includes a parameter that indicates that PHRs associated with the PCell may be able to include the first power headroom value or the second power headroom value, and where transmission of the PHR may be in accordance with the control signaling including the parameter.
[0028] Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving control signaling including a parameter that indicates that the PHR includes a set of multiple power headroom value fields associated with each activated serving cell, where the PHR includes both the first power headroom value and the second power headroom value in accordance with the PHR including the set of multiple power headroom value fields associated with each activated serving cell.
[0029] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the pathloss offset may be associated with an uplink transmit power determination at the UE.
[0030] In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the UE receives the first information and the second information from a first network entity and transmits the PHR to a second network entity and the second network entity may be an uplink-only node.
[0031] A method for wireless communications by a network entity is described. The method may include outputting first information indicative of an uplink shared channel resource allocation associated with a serving cell of a UE, outputting second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset, and obtaining a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0032] A network entity for wireless communications is described. The network entity may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories. The one or more processors may individually or collectively be operable to execute the code to cause the network entity to output first information indicative of an uplink shared channel resource allocation associated with a serving cell of a UE, output second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset, and obtain a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0033] Another network entity for wireless communications is described. The network entity may include means for outputting first information indicative of an uplink shared channel resource allocation associated with a serving cell of a UE, means for outputting second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset, and means for obtaining a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0034] A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by one or more processors to output first information indicative of an uplink shared channel resource allocation associated with a serving cell of a UE, output second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset, and obtain a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0035] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the uplink shared channel transmit power may be associated with a reference uplink shared channel transmission and the SRS transmit power may be associated with a reference SRS transmission and the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the reference uplink shared channel transmission.
[0036] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the uplink shared channel transmit power may be associated with a reference uplink shared channel transmission and the SRS transmit power may be associated with a reference SRS transmission and the criterion indicates that the UE includes the second power headroom value in the PHR in accordance with the SRS transmit power being associated with the reference SRS transmission.
[0037] Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for outputting control signaling indicative of whether to include the first power headroom value or the second power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with a reference uplink shared channel transmission and the SRS transmit power being associated with a reference SRS transmission, where the criterion may be associated with the control signaling indicating whether to include the first power headroom value or the second power headroom value in the PHR.
[0038] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the uplink shared channel transmit power may be associated with a reference uplink shared channel transmission and the SRS transmit power may be associated with an actual SRS transmission and the criterion indicates that the UE includes the second power headroom value in the PHR in accordance with the SRS transmit power being associated with the actual SRS transmission.
[0039] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the uplink shared channel transmit power may be associated with an actual uplink shared channel transmission and the SRS transmit power may be associated with a reference SRS transmission and the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the actual uplink shared channel transmission.
[0040] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the uplink shared channel transmit power may be associated with an actual uplink shared channel transmission and the SRS transmit power may be associated with an actual SRS transmission and the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the actual uplink shared channel transmission.
[0041] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the uplink shared channel transmit power may be associated with an actual uplink shared channel transmission and the SRS transmit power may be associated with an actual SRS transmission and the criterion indicates that the UE includes the second power headroom value in the PHR in accordance the SRS transmit power being associated with the actual SRS transmission.
[0042] Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for outputting control signaling indicative of whether to include the first power headroom value or the second power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with an actual uplink shared channel transmission and the SRS transmit power being associated with an actual SRS transmission, where the criterion may be associated with the control signaling indicating whether to include the first power headroom value or the second power headroom value in the PHR.
[0043] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the criterion indicates that the UE includes both the first power headroom value and the second power headroom value in the PHR in accordance with the first power headroom value and the second power headroom value being available for transmission.
[0044] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the criterion indicates that the UE includes both the first power headroom value and the second power headroom value in the PHR in accordance with the TCI state being associated with the pathloss offset; or excludes the second power headroom value from the PHR in accordance with the TCI state not being associated with the pathloss offset.
[0045] Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for obtaining a message indicative of a capability of the UE associated with including one or both of the first power headroom value and the second power headroom value in the PHR, where obtaining the PHR may be in accordance with the capability of the UE, and where the criterion may be a first criterion in accordance with the capability of the UE indicating that the UE may be capable of including both of the first power headroom value and the second power headroom value in the PHR or the criterion may be a second criterion in accordance with the capability of the UE indicating that the UE may be incapable of including both of the first power headroom value and the second power headroom value in the PHR.
[0046] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the PHR includes an indication of whether the PHR includes the first power headroom value or the second power headroom value.
[0047] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, a first value of the indication indicates that the PHR includes the first power headroom value and a second value of the indication indicates that the PHR includes the second power headroom value.
[0048] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, a first value of the indication indicates that the PHR includes the first power headroom value and a second value of the indication indicates that the PHR includes the first power headroom value and the second power headroom value.
[0049] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the PHR includes a field associated with the serving cell of the UE and the field includes the indication.
[0050] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the PHR includes a field associated with a set of multiple serving cells of the UE including the serving cell and the field includes the indication.
[0051] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the PHR includes a reserved bit and the reserved bit may be interpreted as the indication in accordance with the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset.
[0052] Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for outputting control signaling associated with the serving cell of the UE, where the serving cell of the UE may be a PCell, where the control signaling includes a parameter that indicates that PHRs associated with the PCell may be able to include the first power headroom value or the second power headroom value, and where obtaining the PHR may be in accordance with the control signaling including the parameter.
[0053] Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for outputting control signaling including a parameter that indicates that the PHR includes a set of multiple power headroom value fields associated with each activated serving cell, where the PHR includes both the first power headroom value and the second power headroom value in accordance with the PHR including the set of multiple power headroom value fields associated with each activated serving cell.
[0054] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the pathloss offset may be associated with an uplink transmit power determination at the UE.
[0055] In some examples of the method, network entities, and non-transitory computer-readable medium described herein, the network entity outputs the first information and the second information to the UE and obtains the PHR from the UE via a second network entity and the second network entity may be an uplink-only node.
[0056] Details of one or more implementations of the subject matter described in this disclosure are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages will become apparent from the description, the drawings, and the claims. Note that the relative dimensions of the following figures may not be drawn to scale.BRIEF DESCRIPTION OF THE DRAWINGS
[0057] FIG. 1 shows an example of a wireless communications system that supports techniques for power headroom (PHR) reporting in uplink dense deployments in accordance with various aspects of the present disclosure.
[0058] FIG. 2 shows an example of a network architecture that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure.
[0059] FIG. 3 shows an example of an uplink dense deployment that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure.
[0060] FIG. 4 shows an example of a signaling diagram that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure.
[0061] FIGs. 5–9 show examples of power headroom report (PHR) formats that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure.
[0062] FIG. 10 shows an example of a process flow that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure.
[0063] FIGs. 11 and 12 show block diagrams of devices that support techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure.
[0064] FIG. 13 shows a block diagram of a communications manager that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure.
[0065] FIG. 14 shows a diagram of a system including a device that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure.
[0066] FIGs. 15 and 16 show block diagrams of devices that support techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure.
[0067] FIG. 17 shows a block diagram of a communications manager that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure.
[0068] FIG. 18 shows a diagram of a system including a device that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure.
[0069] FIGs. 19 and 20 show flowcharts illustrating methods that support techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure.DETAILED DESCRIPTION
[0070] In some wireless communications systems, a network entity may be associated with (e.g., control or operate) at least one downlink transmission point and at least one uplink reception point that is non-collocated with the at least one downlink transmission point. Further, in some systems, a quantity of uplink reception points may exceed a quantity of downlink transmission points, such as to increase an uplink coverage or capacity. Such systems may be understood as supporting or operating an asymmetric quantity of downlink and uplink nodes. The one or more uplink reception points (which may be referred to or understood as “UL Rx points” or “UL-only nodes” ) may be located throughout a geographic area to provide more points to which a user equipment (UE) may transmit uplink signaling (e.g., in addition to a base station that is capable of both downlink and uplink communication) . An uplink reception point may be incapable of transmitting downlink signaling, such that a UE may receive signaling from a downlink transmission point (which may be a base station or collocated with the base station, and which may be referred to as a “DL Tx point” ) and transmit signaling to an uplink reception point that is non-collocated with (e.g., positionally or geographically separated from) the downlink transmission point.
[0071] Although a UE may primarily transmit uplink signaling (e.g., physical uplink shared channel (PUSCH) messages) to an uplink reception point, the UE may still transmit some uplink signaling to a downlink transmission point. Such signaling that the UE transmits to the downlink transmission point may include a sounding reference signal (SRS) . The downlink transmission point may use SRS transmissions by the UE to acquire downlink channel state information (CSI) , such as by assuming channel reciprocity. In accordance with the non-collocation between the downlink transmission point and the uplink reception point, a pathloss between the UE and the downlink transmission point and a pathloss between the UE and the uplink reception point may differ. Transmit powers that the UE uses for PUSCH transmissions (to the uplink reception point) and for SRS transmissions (to the downlink transmission point) may likewise differ. Thus, in scenarios in which a UE communicates with a downlink transmission point and an uplink reception point, uplink transmit power control procedures (including power headroom reporting) for PUSCH and SRS may be different.
[0072] Some systems, however, may disallow power headroom reporting associated with an SRS transmission in a serving cell for which a PUSCH is configured, instead expecting power headroom reporting to rely (entirely or mostly) on PUSCH transmissions. This may result in inefficient or inaccurate transmit power control in scenarios in which a UE communicates with a downlink transmission point and a non-collocated uplink reception point, as PUSCH and SRS may be associated with different power headroom values (due to the differences in relevant pathlosses) , such that a PUSCH power headroom may not be representative of an SRS power headroom. Accordingly, some systems may benefit from additional power headroom reporting flexibility in scenarios in which a UE communicates with a downlink transmission point and a non-collocated uplink reception point, or in any other scenarios in which a PUSCH power headroom and an SRS power headroom differ in non-static ways.
[0073] Various aspects relate to power headroom reporting in uplink dense deployments, which may be deployments associated with an asymmetric quantity of downlink and uplink nodes (e.g., a single downlink transmission point and multiple uplink reception points, among other examples) . Some aspects more specifically relate to one or more configuration-or signaling-based mechanisms according to which a UE may selectively or conditionally determine whether to include, within a power headroom report (PHR) , one or both of a first power headroom value associated with a PUSCH transmission in a serving cell and a second power headroom value associated with an SRS transmission in the serving cell. The first power headroom value may be a Type 1 power headroom value and the second power headroom value may be a Type 3 power headroom value. In some examples, the UE may include, within the PHR, one or both of the first power headroom value or the second power headroom value based on a criterion. The criterion may be based on the serving cell being configured with a PUSCH allocation (e.g., a PUSCH resource) and an indicated transmission configuration indicator (TCI) state of the serving cell being associated with a pathloss offset (which may be indicative of an uplink dense deployment) . Some other aspects more specifically relate to one or more PHR formats according to which the UE and a network entity may convey one or both of the first power headroom value and the second power headroom value, among other signaling mechanisms between the UE and the network entity to support reporting one or both of the first power headroom value and the second power headroom value.
[0074] Aspects of the subject matter of the present disclosure can be implemented to realize one or more of the following advantages. For example, by enabling a UE to report one or both of the first power headroom value and the second power headroom value (each associated with a same serving cell) via a same PHR, the described techniques may be implemented to achieve more accurate and efficient uplink transmit power control at the UE across various deployment scenarios, including scenarios of an uplink dense deployment. Further, by selectively or conditionally including one or both of the first power headroom value and the second power headroom value in the PHR in accordance with a criterion, both a UE and a network entity may maintain aligned expectations as to when first power headroom value is reported, when the second power headroom value is reported, and when both the first and second power headroom values are reported. By maintaining such aligned expectations, the UE and the network entity may experience fewer misinterpretations of reported information, which may increase a reliability of the uplink transmit power control at the UE. Moreover, by supporting one or more of various PHR formats according to which a UE may indicate one or both of the first power headroom value and the second power headroom value, the UE and the network entity may efficiently convey information regarding a content of the PHR. In accordance with one or more of such aspects, the described techniques may be further implemented to realize higher data rates, greater system capacity, and greater spectral efficiency, among other benefits.
[0075] Aspects of the disclosure are initially described in the context of a wireless communications system. Additionally, aspects of the disclosure are further illustrated by and described with to a network architecture, an uplink dense deployment, a signaling diagram, PHR formats, and a process flow. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to techniques for power headroom reporting in uplink dense deployments.
[0076] FIG. 1 shows an example of a wireless communications system 100 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The wireless communications system 100 may include one or more devices, such as one or more network devices (e.g., network entities 105) , one or more UEs 115, and a core network 130. In some examples, the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, a New Radio (NR) network, or a network operating in accordance with other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.
[0077] The network entities 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may include devices in different forms or having different capabilities. In various examples, a network entity 105 may be referred to as a network element, a mobility element, a radio access network (RAN) node, or network equipment, among other nomenclature. In some examples, network entities 105 and UEs 115 may wirelessly communicate via communication link (s) 125 (e.g., a radio frequency (RF) access link) . For example, a network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) over which the UEs 115 and the network entity 105 may establish the communication link (s) 125. The coverage area 110 may be an example of a geographic area over which a network entity 105 and a UE 115 may support the communication of signals according to one or more radio access technologies (RATs) .
[0078] The UEs 115 may be dispersed throughout a coverage area 110 of the wireless communications system 100, and each UE 115 may be stationary, or mobile, or both at different times. The UEs 115 may be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of supporting communications with various types of devices in the wireless communications system 100 (e.g., other wireless communication devices, including UEs 115 or network entities 105) , as shown in FIG. 1.
[0079] As described herein, a node of the wireless communications system 100, which may be referred to as a network node, or a wireless node, may be a network entity 105 (e.g., any network entity described herein) , a UE 115 (e.g., any UE described herein) , a network controller, an apparatus, a device, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, a node may be a UE 115. As another example, a node may be a network entity 105. As another example, a first node may be configured to communicate with a second node or a third node. In one aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a UE 115. In another aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a network entity 105. In yet other aspects of this example, the first, second, and third nodes may be different relative to these examples. Similarly, reference to a UE 115, network entity 105, apparatus, device, computing system, or the like may include disclosure of the UE 115, network entity 105, apparatus, device, computing system, or the like being a node. For example, disclosure that a UE 115 is configured to receive information from a network entity 105 also discloses that a first node is configured to receive information from a second node.
[0080] In some examples, network entities 105 may communicate with a core network 130, or with one another, or both. For example, network entities 105 may communicate with the core network 130 via backhaul communication link (s) 120 (e.g., in accordance with an S1, N2, N3, or other interface protocol) . In some examples, network entities 105 may communicate with one another via backhaul communication link (s) 120 (e.g., in accordance with an X2, Xn, or other interface protocol) either directly (e.g., directly between network entities 105) or indirectly (e.g., via the core network 130) . In some examples, network entities 105 may communicate with one another via a midhaul communication link 162 (e.g., in accordance with a midhaul interface protocol) or a fronthaul communication link 168 (e.g., in accordance with a fronthaul interface protocol) , or any combination thereof. The backhaul communication link (s) 120, midhaul communication links 162, or fronthaul communication links 168 may be or include one or more wired links (e.g., an electrical link, an optical fiber link) or one or more wireless links (e.g., a radio link, a wireless optical link) , among other examples or various combinations thereof. A UE 115 may communicate with the core network 130 via a communication link 155.
[0081] One or more of the network entities 105 or network equipment described herein may include or may be referred to as a base station 140 (e.g., a base transceiver station, a radio base station, an NR base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or giga-NodeB (either of which may be referred to as a gNB) , a 5G NB, a next-generation eNB (ng-eNB) , a Home NodeB, a Home eNodeB, or other suitable terminology) . In some examples, a network entity 105 (e.g., a base station 140) may be implemented in an aggregated (e.g., monolithic, standalone) base station architecture, which may be configured to utilize a protocol stack that is physically or logically integrated within one network entity (e.g., a network entity 105 or a single RAN node, such as a base station 140) .
[0082] In some examples, a network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) , which may be configured to utilize a protocol stack that is physically or logically distributed among multiple network entities (e.g., network entities 105) , such as an integrated access and backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) . For example, a network entity 105 may include one or more of a central unit (CU) , such as a CU 160, a distributed unit (DU) , such as a DU 165, a radio unit (RU) , such as an RU 170, a RAN Intelligent Controller (RIC) , such as an RIC 175 (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) system, such as an SMO 180, or any combination thereof. An RU 170 may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) . One or more components of the network entities 105 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 105 may be located in distributed locations (e.g., separate physical locations) . In some examples, one or more of the network entities 105 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) .
[0083] The split of functionality between a CU 160, a DU 165, and an RU 170 is flexible and may support different functionalities depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, or any combinations thereof) are performed at a CU 160, a DU 165, or an RU 170. For example, a functional split of a protocol stack may be employed between a CU 160 and a DU 165 such that the CU 160 may support one or more layers of the protocol stack and the DU 165 may support one or more different layers of the protocol stack. In some examples, the CU 160 may host upper protocol layer (e.g., layer 3 (L3) , layer 2 (L2) ) functionality and signaling (e.g., Radio Resource Control (RRC) , service data adaptation protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) . The CU 160 (e.g., one or more CUs) may be connected to a DU 165 (e.g., one or more DUs) or an RU 170 (e.g., one or more RUs) , or some combination thereof, and the DUs 165, RUs 170, or both may host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160. Additionally, or alternatively, a functional split of the protocol stack may be employed between a DU 165 and an RU 170 such that the DU 165 may support one or more layers of the protocol stack and the RU 170 may support one or more different layers of the protocol stack. The DU 165 may support one or multiple different cells (e.g., via one or multiple different RUs, such as an RU 170) . In some cases, a functional split between a CU 160 and a DU 165 or between a DU 165 and an RU 170 may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU 160, a DU 165, or an RU 170, while other functions of the protocol layer are performed by a different one of the CU 160, the DU 165, or the RU 170) . A CU 160 may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU 160 may be connected to a DU 165 via a midhaul communication link 162 (e.g., F1, F1-c, F1-u) , and a DU 165 may be connected to an RU 170 via a fronthaul communication link 168 (e.g., open fronthaul (FH) interface) . In some examples, a midhaul communication link 162 or a fronthaul communication link 168 may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities (e.g., one or more of the network entities 105) that are in communication via such communication links.
[0084] In some wireless communications systems (e.g., the wireless communications system 100) , infrastructure and spectral resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, providing an IAB network architecture (e.g., to a core network 130) . In some cases, in an IAB network, one or more of the network entities 105 (e.g., network entities 105 or IAB node (s) 104) may be partially controlled by each other. The IAB node (s) 104 may be referred to as a donor entity or an IAB donor. A DU 165 or an RU 170 may be partially controlled by a CU 160 associated with a network entity 105 or base station 140 (such as a donor network entity or a donor base station) . The one or more donor entities (e.g., IAB donors) may be in communication with one or more additional devices (e.g., IAB node (s) 104) via supported access and backhaul links (e.g., backhaul communication link (s) 120) . IAB node (s) 104 may include an IAB mobile termination (IAB-MT) controlled (e.g., scheduled) by one or more DUs (e.g., DUs 165) of a coupled IAB donor. An IAB-MT may be equipped with an independent set of antennas for relay of communications with UEs 115 or may share the same antennas (e.g., of an RU 170) of IAB node (s) 104 used for access via the DU 165 of the IAB node (s) 104 (e.g., referred to as virtual IAB-MT (vIAB-MT) ) . In some examples, the IAB node (s) 104 may include one or more DUs (e.g., DUs 165) that support communication links with additional entities (e.g., IAB node (s) 104, UEs 115) within the relay chain or configuration of the access network (e.g., downstream) . In such cases, one or more components of the disaggregated RAN architecture (e.g., the IAB node (s) 104 or components of the IAB node (s) 104) may be configured to operate according to the techniques described herein.
[0085] In the case of the techniques described herein applied in the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture may be configured to support techniques for power headroom reporting in uplink dense deployments as described herein. For example, some operations described as being performed by a UE 115 or a network entity 105 (e.g., a base station 140) may additionally, or alternatively, be performed by one or more components of the disaggregated RAN architecture (e.g., components such as an IAB node, a DU 165, a CU 160, an RU 170, an RIC 175, an SMO 180) .
[0086] A UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples. A UE 115 may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer. In some examples, a UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, vehicles, or meters, among other examples.
[0087] The UEs 115 described herein may be able to communicate with various types of devices, such as UEs 115 that may sometimes operate as relays, as well as the network entities 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
[0088] The UEs 115 and the network entities 105 may wirelessly communicate with one another via the communication link (s) 125 (e.g., one or more access links) using resources associated with one or more carriers. The term “carrier” may refer to a set of RF spectrum resources having a defined PHY layer structure for supporting the communication link (s) 125. For example, a carrier used for the communication link (s) 125 may include a portion of an RF spectrum band (e.g., a bandwidth part (BWP) ) that is operated according to one or more PHY layer channels for a given RAT (e.g., LTE, LTE-A, LTE-A Pro, NR) . Each PHY layer channel may carry acquisition signaling (e.g., synchronization signals, system information) , control signaling that coordinates operation for the carrier, user data, or other signaling. The wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation. A UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers. Communication between a network entity 105 and other devices may refer to communication between the devices and any portion (e.g., entity, sub-entity) of a network entity 105. For example, the terms “transmitting, ” “receiving, ” or “communicating, ” when referring to a network entity 105, may refer to any portion of a network entity 105 (e.g., a base station 140, a CU 160, a DU 165, a RU 170) of a RAN communicating with another device (e.g., directly or via one or more other network entities, such as one or more of the network entities 105) .
[0089] Signal waveforms transmitted via a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) . In a system employing MCM techniques, a resource element may refer to resources of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, in which case the symbol period and subcarrier spacing may be inversely related. The quantity of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both) , such that a relatively higher quantity of resource elements (e.g., in a transmission duration) and a relatively higher order of a modulation scheme may correspond to a relatively higher rate of communication. A wireless communications resource may refer to a combination of an RF spectrum resource, a time resource, and a spatial resource (e.g., a spatial layer, a beam) , and the use of multiple spatial resources may increase the data rate or data integrity for communications with a UE 115.
[0090] The time intervals for the network entities 105 or the UEs 115 may be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of Ts=1 / (Δfmax·Nf) seconds, for which Δfmax may represent a supported subcarrier spacing, and Nf may represent a supported discrete Fourier transform (DFT) size. Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms) ) . Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023) .
[0091] Each frame may include multiple consecutively-numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a quantity of slots. Alternatively, each frame may include a variable quantity of slots, and the quantity of slots may depend on subcarrier spacing. Each slot may include a quantity of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) . In some wireless communications systems, such as the wireless communications system 100, a slot may further be divided into multiple mini-slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., Nf) sampling periods.
[0092] The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.
[0093] A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI) . In some examples, the TTI duration (e.g., a quantity of symbol periods in a TTI) may be variable. Additionally, or alternatively, the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) ) .
[0094] Physical channels may be multiplexed for communication using a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed for signaling via a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET) ) for a physical control channel may be defined by a set of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) may be configured for a set of the UEs 115. For example, one or more of the UEs 115 may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to an amount of control channel resources (e.g., control channel elements (CCEs) ) associated with encoded information for a control information format having a given payload size. Search space sets may include common search space sets configured for sending control information to UEs 115 (e.g., one or more UEs) or may include UE-specific search space sets for sending control information to a UE 115 (e.g., a specific UE) .
[0095] In some examples, a network entity 105 (e.g., a base station 140, an RU 170) may be movable and therefore provide communication coverage for a moving coverage area, such as the coverage area 110. In some examples, coverage areas 110 (e.g., different coverage areas) associated with different technologies may overlap, but the coverage areas 110 (e.g., different coverage areas) may be supported by the same network entity (e.g., a network entity 105) . In some other examples, overlapping coverage areas, such as a coverage area 110, associated with different technologies may be supported by different network entities (e.g., the network entities 105) . The wireless communications system 100 may include, for example, a heterogeneous network in which different types of the network entities 105 support communications for coverage areas 110 (e.g., different coverage areas) using the same or different RATs.
[0096] The wireless communications system 100 may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications system 100 may be configured to support ultra-reliable low-latency communications (URLLC) . The UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions. Ultra-reliable communications may include private communication or group communication and may be supported by one or more services such as push-to-talk, video, or data. Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency may be used interchangeably herein.
[0097] In some examples, a UE 115 may be configured to support communicating directly with other UEs (e.g., one or more of the UEs 115) via a device-to-device (D2D) communication link, such as a D2D communication link 135 (e.g., in accordance with a peer-to-peer (P2P) , D2D, or sidelink protocol) . In some examples, one or more UEs 115 of a group that are performing D2D communications may be within the coverage area 110 of a network entity 105 (e.g., a base station 140, an RU 170) , which may support aspects of such D2D communications being configured by (e.g., scheduled by) the network entity 105. In some examples, one or more UEs 115 of such a group may be outside the coverage area 110 of a network entity 105 or may be otherwise unable to or not configured to receive transmissions from a network entity 105. In some examples, groups of the UEs 115 communicating via D2D communications may support a one-to-many (1: M) system in which each UE 115 transmits to one or more of the UEs 115 in the group. In some examples, a network entity 105 may facilitate the scheduling of resources for D2D communications. In some other examples, D2D communications may be carried out between the UEs 115 without an involvement of a network entity 105.
[0098] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or 5G core (5GC) , which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management function (AMF) ) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the network entities 105 (e.g., base stations 140) associated with the core network 130. User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to IP services 150 for one or more network operators. The IP services 150 may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched Streaming Service.
[0099] The wireless communications system 100 may operate using one or more frequency bands, which may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) . The region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features, which may be referred to as clusters, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than one hundred kilometers) compared to communications using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
[0100] The wireless communications system 100 may utilize both licensed and unlicensed RF spectrum bands. For example, the wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) RAT, or NR technology using an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. While operating using unlicensed RF spectrum bands, devices such as the network entities 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance. In some examples, operations using unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating using a licensed band (e.g., LAA) . Operations using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.
[0101] A network entity 105 (e.g., a base station 140, an RU 170) or a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a network entity 105 or a UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with a network entity 105 may be located at diverse geographic locations. A network entity 105 may include an antenna array with a set of rows and columns of antenna ports that the network entity 105 may use to support beamforming of communications with a UE 115. Likewise, a UE 115 may include one or more antenna arrays that may support various MIMO or beamforming operations. Additionally, or alternatively, an antenna panel may support RF beamforming for a signal transmitted via an antenna port.
[0102] Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a network entity 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating along some orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with an orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .
[0103] A UE 115 and a network entity 105 may use one of various different power control formulas or equations for uplink power control, such as depending on a type of transmission by the UE 115. For example, to transmit via a physical uplink shared channel (PUSCH) , a UE 115 may select a transmit power in accordance with Equations 1–3, shown below. x=PCMAX, f, c (i) (2)
[0104] In some aspects, the PLb, f, c (qd) parameter may be associated with a PUSCH-PathlossReferenceRS parameter, which may be a sequence of push-PathlossReferenceRS-Id and referencesignal including choices of ssb-Index and csi-RS-Index. One or more PUSCH-PathlossReferenceRS parameters can be configured for the UE 115, and an SRS resource indicator (SRI) field in an uplink grant can indicate which PUSCH-PathlossReferenceRS parameter to use (e.g., when more than one PUSCH-PathlossReferenceRS parameter is configured) . For example, an SRI-PUSCH-PowerControl parameter may be a sequence of sri-PUSCH-PowerControlId, sri-PUSCH-PathlossReferenceRS-Id, sri-P0-PUSCH-AlphaSetId, and sri-PUSCH- ClosedLoopIndex. If the UE 115 is not provided PUSCH-PathlossReferenceRS or before the UE 115 is provided dedicated higher layer parameters, the UE may calculate PLb,f, c (qd) using a reference signal resource from a synchronization signal (SS) / physical broadcast channel (PBCH) (SS / PBCH) block that the UE 115 uses to obtain a master information block (MIB) . If the PUSCH transmission is scheduled by a random access response (RAR) uplink grant, or for a PUSCH transmission for a Type-2 random access procedure, the UE 115 may use the same reference signal resource index qd as for a corresponding physical random access channel (PRACH) transmission. For PUSCH transmissions, alpha (e.g., αb, f, c (j) ) may indicate or be associated with a partial pathloss compensation and may be referred to herein as a pathloss compensation coefficient.
[0105] For further example, to transmit via a physical uplink control channel (PUCCH) , a UE 115 may select a transmit power in accordance with Equations 4–6, shown below. x=PCMAX, f, c (i) (5)
[0106] In some aspects, the PLb, f, c (qd) parameter may be associated with a PUCCH-PathlossReferenceRS parameter, which may be a sequence of pucch-PathlossReferenceRS-Id and referencesignal including choices of ssb-Index and csi-RS-Index. One or more PUCCH-PathlossReferenceRS parameters can be configured for the UE 115 (via RRC signaling) , and one of the PUCCH-PathlossReferenceRS parameters may be activated by MAC control element (MAC-CE) for a given PUCCH resource. The transmit power for PUCCH may be determined with a full pathloss compensation (e.g., alpha = 1) .
[0107] For further example, to transmit an SRS, a UE 115 may select a transmit power in accordance with Equations 7–9, shown below. x=PCMAX, f, c (i) (8)
[0108] For SRS transmissions, a pathlossReferenceRS parameter may be configured via RRC signaling per SRS resource set and the UE 115 may apply the pathlossReferenceRS for all the SRS resources within the set. In some aspects, the pathlossReferenceRS parameter may be updated by MAC-CE for an SRS resource set.
[0109] Further, for uplink power control for a unified TCI state, on a setting of uplink power control parameters except pathloss reference signal (e.g., P0, alpha, closed loop index) for unified TCI state, the setting of (P0, alpha, closed loop index) for PUCCH / PUSCH / SRS may be associated with an uplink or joint TCI state. The setting of (P0, alpha, closed loop index) may at least be associated with an uplink channel or a reference signal and, thus, the setting of (P0, alpha, closed loop index) may be channel / signal dependent. Regarding pathloss measurement for a unified TCI framework, a pathloss reference signal (configured for pathloss calculation) may either be included in an uplink TCI state, included in a joint TCI state (if applicable) , associated with an uplink TCI state, or associated with a joint TCI state (if applicable) . Such inclusion and / or association may be in accordance with a TCI-State parameter, an Uplink-powerControl parameter, and / or a TCI-UL-State parameter, and one or more of the contents therein. For some PUCCH / PUSCH / SRS transmissions, with or without a unified TCI state, the UE 115 may expect to use a pathloss reference signal (e.g., a measurement thereof) as part of calculating or otherwise determining an uplink transmit power.
[0110] A UE 115 and a network entity 105 may support one or more uplink power control mechanisms according to which the UE 115 may selectively apply one or more pathloss offsets to a nominal pathloss or a measured downlink pathloss and / or according to which the UE 115 may selectively apply a pathloss scaling factor (as a standalone, independent parameter or as a combined parameter with a pathloss compensation coefficient) to a nominal pathloss or a measured downlink pathloss. In some aspects, a joint or uplink TCI state being associated with a pathloss offset (or a pathloss scaling factor) may at least implicitly indicate that a UE 115 is in an uplink dense deployment, such as a deployment associated with a downlink transmission point and one or multiple separate uplink reception points. For example, a pathloss offset (or a pathloss scaling factor) may be indicative of a difference between a first pathloss between a downlink transmission point and a UE 115 and a second pathloss between the UE 115 and an uplink reception point.
[0111] A UE 115 may report (e.g., transmit) information associated with an uplink transmit power used by the UE 115 to a network entity 105, such as to enable suitable uplink power control at the UE 115 by the network entity 105. For example, a UE 115 may transmit a PHR, which may be signaling to report a power difference between a configured maximum (e.g., upper limit) output power and a (predicted or actual) transmission power of a PUSCH transmission, a PUCCH transmission, or an SRS transmission. A network entity 105 receiving a PHR may use the PHR to more efficiently use available radio resources with respect to the UE transmission power.
[0112] A PHR may indicate various types of power headroom values. For example, a UE 115 may indicate, via a PHR, a Type 1 power headroom value, a Type 2 power headroom value, or a Type 3 power headroom value. A Type 1 power headroom value may correspond to or otherwise be indicative of a difference between a nominal UE maximum (e.g., network defined) transmit power and an estimated or actual transmit power for an uplink shared channel (e.g., a PUSCH) transmission per activated serving cell. A Type 2 power headroom value may correspond to or otherwise be indicative of a difference between a maximum (e.g., network defined) transmit power and a sum of estimated or actual transmit powers for a PUSCH transmission and a PUCCH transmission per activated serving cell. A Type 3 power headroom value may correspond to or otherwise be indicative of a difference between a nominal UE maximum (e.g., network defined) transmit power and an estimated or actual transmit power for an SRS transmission per activated serving cell. Each type of power headroom value may be a value within a defined range of values, with each value within the defined range of values corresponding to a respective power headroom, or a respective range of power headrooms, in decibels (dB) . A power headroom may be positive (if a UE 115 is transmitting below a network defined upper limit transmit power) or negative (if a UE 115 is transmitting above a network defined upper limit transmit power) .
[0113] A UE 115 may transmit a PHR in accordance with a trigger. A PHR may be triggered in accordance with any of various criteria being satisfied. Such criteria being satisfied may include an expiration of a first timer (e.g., an expiration of a phr-PeriodicTimer) . Additionally, or alternatively, such criteria being satisfied may include an expiration of a second timer (e.g., an expiration of a phr-ProhibitTimer) or a previous expiration of the second timer with a pathloss also having changed more than a threshold amount (e.g., more than phr-Tx-PowerFactorChange dB) for at least one reference signal used as a pathloss reference for at least one activated serving cell of any MAC entity of which the active downlink bandwidth part (BWP) is not a dormant BWP since a last transmission of a PHR in this MAC entity when the MAC entity has uplink resources for a new transmission. A pathloss variation for the at least one cell may be between a pathloss measured at a present (e.g., current or recent) time on the current pathloss reference and a pathloss measured at a transmission time of the last transmission of a PHR on the pathloss reference in use at that time, irrespective of whether the pathloss reference has changed in between.
[0114] A UE 115 may transmit a PHR via a MAC-CE, such as a PHR MAC-CE. A PHR MAC-CE may include a first octet indicative of for which serving cells a power headroom is being reported. For example, the first octet may include a C1 field indicative of whether a power headroom field is present for a first serving cell associated with a ServCellIndex 1, a C2 field indicative of whether a power headroom field is present for a second serving cell associated with a ServCellIndex 2, a C3 field indicative of whether a power headroom field is present for a third serving cell associated with a ServCellIndex 3, and so on. A Ci field may indicate a presence of one or more power headroom fields for the serving cell with ServCellIndex i. The Ci field may be set to 1 to indicate that power headroom field (s) for the serving cell with ServCellIndex i are reported via the PHR MAC-CE. The Ci field may be set to 0 to indicate that a power headroom field for the serving cell with ServCellIndex i is not reported via the PHR MAC-CE. In some cases, there may be seven C fields within the first octet (and one reserved field of 1 bit) .
[0115] In some cases, one or two octets subsequent to the first octet may include one or two power headroom fields (each 6 bits) indicative of power headroom values (e.g., Type 2 power headroom values) associated with a special cell (SpCell) of another MAC entity. One or two octets subsequent to the octet (s) associated with the SpCell of the other MAC entity may include one or two power headroom fields (each 6 bits) indicative of power headroom values (e.g., Type 1 power headroom values) associated with a primary cell (PCell) . One or two octets subsequent to the octet (s) associated with the PCell may include one or two power headroom fields (each 6 bits) indicative of power headroom values associated with a serving cell 1 (e.g., a serving cell associated with a ServCellIndex 1) , followed by octets associated with other serving cells until a serving cell n (e.g., a final serving cell for which at least one power headroom value is reported via the PHR MAC-CE) . The PHR MAC-CE may include at least one octet for each cell for which at least one power headroom value is reported, with a second octet for that same cell being optional. A power headroom field may be denoted as a power headroom field i, with this field indicating the power headroom level. The length of the field may be 6 bits.
[0116] A PHR MAC-CE may additionally indicate a respective PCMAX, f, c value (e.g., 6 bits) for each cell for which at least one power headroom value is reported. An octet including a field indicative of a PCMAX, f, c value may also include an “maximum permissible exposure (MPE) or reserved (R) ” field (e.g., 2 bits) . If mpe-Reporting-FR2 is configured, and if the serving cell operates on FR2, and if a corresponding “P” field within the PHR MAC-CE is set to 1, this field may indicate the applied power backoff to meet MPE constraints or expectations. If mpe-Reporting-FR2 is not configured, or if the serving cell operates on FR1, or if the “P” field is set to 0, reserved bits may be present instead.
[0117] A UE 115 and a network entity 105 may (conditionally or selectively) support Type 3 PHR reporting in a serving cell or BWP in which the UE 115 is configured with two separate SRS closed-loop power control adjustment states. Further, in some systems, a UE 115 and a network entity 105 may (conditionally or selectively) support including a pathloss offset in a calculation of a Type 3 PHR.
[0118] In some systems, Type 3 PHR may be expected to be absent in scenarios in which a PUSCH is configured in the serving cell. In some deployment scenarios (e.g., an uplink dense deployment) , however, it may be beneficial to enable Type 3 PHR triggering and reporting for SRS transmitted to a downlink transmission point (for downlink CSI acquisition) while PUSCH messages are transmitted to an uplink reception point (e.g., an “uplink only TRP” ) . If Type 3 PHR can be triggered when a PUSCH is configured in the serving cell, a UE 115 may be expected to report two types of power headroom values in one serving cell, which may be barred by some systems. For example, some systems may specify that only Type 1 PHR can be reported per serving cell if a PUSCH is configured in the serving cell. Thus, some systems may benefit from additional configurational and PHR reporting flexibility, and associated criteria and rules, to enable more flexible PHRs (for a single TRP in an uplink dense deployment) .
[0119] Accordingly, in some implementations, a UE 115 and a network entity 105 may support one or more configuration-or signaling-based mechanisms according to which the UE 115 may generate and transmit a PHR including one or both of a Type 1 power headroom value and a Type 3 power headroom value for a serving cell, and according to which the network entity 105 may receive and parse the PHR. In some examples, whether a Type 3 power headroom value is able to be reported by the UE 115 via a PHR MAC-CE when PUSCH is configured in the serving cell may be based on a criterion. Additionally, or alternatively, the UE 115 and the network entity 105 may support one or more PHR formats according to which a PHR may include one or more bits or one or more fields, or any combination thereof, indicating whether the PHR includes one or both of a Type 1 power headroom value and a Type 3 power headroom value for a serving cell.
[0120] FIG. 2 shows an example of a network architecture 200 (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The network architecture 200 may illustrate an example for implementing one or more aspects of the wireless communications system 100. The network architecture 200 may include one or more CUs 160 that may communicate directly with a core network 130 via a backhaul communication link 120, or indirectly with the core network 130 through one or more disaggregated network entities 105 (e.g., a Near-RT RIC 175-b via an E2 link, or a Non-RT RIC 175-a associated with an SMO 180 (e.g., an SMO Framework or an SMO system) , or both) . A CU 160 may communicate with one or more DUs 165 via respective midhaul communication links 162 (e.g., an F1 interface) . The DUs 165 may communicate with one or more RUs 170 via respective fronthaul communication links 168. The RUs 170 may be associated with respective coverage areas 110 and may communicate with UEs 115 via one or more communication links 125. In some implementations, a UE 115 may be simultaneously served by multiple RUs 170.
[0121] Each of the network entities 105 of the network architecture 200 (e.g., CUs 160, DUs 165, RUs 170, Non-RT RICs 175-a, Near-RT RICs 175-b, SMOs 180, Open Clouds (O-Clouds) 205, Open eNBs (O-eNBs) 210) may include one or more interfaces or may be coupled with one or more interfaces configured to receive or transmit signals (e.g., data, information) via a wired or wireless transmission medium. Each network entity 105, or an associated processor (e.g., controller) providing instructions to an interface of the network entity 105, may be configured to communicate with one or more of the other network entities 105 via the transmission medium. For example, the network entities 105 may include a wired interface configured to receive or transmit signals over a wired transmission medium to one or more of the other network entities 105. Additionally, or alternatively, the network entities 105 may include a wireless interface, which may include a receiver, a transmitter, or transceiver (e.g., an RF transceiver) configured to receive or transmit signals, or both, over a wireless transmission medium to one or more of the other network entities 105.
[0122] In some examples, a CU 160 may host one or more higher layer control functions. Such control functions may include RRC, PDCP, SDAP, or the like. Each control function may be implemented with an interface configured to communicate signals with other control functions hosted by the CU 160. A CU 160 may be configured to handle user plane functionality (e.g., CU-UP) , control plane functionality (e.g., CU-CP) , or a combination thereof. In some examples, a CU 160 may be logically split into one or more CU-UP units and one or more CU-CP units. A CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface, such as an E1 interface when implemented in an O-RAN configuration. A CU 160 may be implemented to communicate with a DU 165, as necessary, for network control and signaling.
[0123] A DU 165 may correspond to a logical unit that includes one or more functions (e.g., base station functions, RAN functions) to control the operation of one or more RUs 170. In some examples, a DU 165 may host, at least partially, one or more of an RLC layer, a MAC layer, and one or more aspects of a PHY layer (e.g., a high PHY layer, such as components for FEC encoding and decoding, scrambling, modulation and demodulation, or the like) depending, at least in part, on a functional split, such as those defined by the 3rd Generation Partnership Project (3GPP) . In some examples, a DU 165 may further host one or more low PHY layers. Each layer may be implemented with an interface configured to communicate signals with other layers hosted by the DU 165, or with control functions hosted by a CU 160.
[0124] In some examples, lower-layer functionality may be implemented by one or more RUs 170. For example, an RU 170, controlled by a DU 165, may correspond to a logical node that hosts RF processing functions, or low-PHY layer functions (e.g., performing fast Fourier transform (FFT) , inverse FFT (iFFT) , digital beamforming, physical random access channel (PRACH) extraction and filtering, or the like) , or both, based at least in part on the functional split, such as a lower-layer functional split. In such an architecture, an RU 170 may be implemented to handle over the air (OTA) communication with one or more UEs 115. In some implementations, real-time and non-real-time aspects of control and user plane communication with the RU (s) 170 may be controlled by the corresponding DU 165. In some examples, such a configuration may enable a DU 165 and a CU 160 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
[0125] The SMO 180 may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network entities 105. For non-virtualized network entities 105, the SMO 180 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements which may be managed via an operations and maintenance interface (e.g., an O1 interface) . For virtualized network entities 105, the SMO 180 may be configured to interact with a cloud computing platform (e.g., an O-Cloud 205) to perform network entity life cycle management (e.g., to instantiate virtualized network entities 105) via a cloud computing platform interface (e.g., an O2 interface) . Such virtualized network entities 105 can include, but are not limited to, CUs 160, DUs 165, RUs 170, and Near-RT RICs 175-b. In some implementations, the SMO 180 may communicate with components configured in accordance with a 4G RAN (e.g., via an O1 interface) . Additionally, or alternatively, in some implementations, the SMO 180 may communicate directly with one or more RUs 170 via an O1 interface. The SMO 180 also may include a Non-RT RIC 175-a configured to support functionality of the SMO 180.
[0126] The Non-RT RIC 175-a may be configured to include a logical function that enables non-real-time control and optimization of RAN elements and resources, Artificial Intelligence (AI) or Machine Learning (ML) workflows including model training and updates, or policy-based guidance of applications / features in the Near-RT RIC 175-b. The Non-RT RIC 175-a may be coupled to or communicate with (e.g., via an A1 interface) the Near-RT RIC 175-b. The Near-RT RIC 175-b may be configured to include a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (e.g., via an E2 interface) connecting one or more CUs 160, one or more DUs 165, or both, as well as an O-eNB 210, with the Near-RT RIC 175-b.
[0127] In some examples, to generate AI / ML models to be deployed in the Near-RT RIC 175-b, the Non-RT RIC 175-a may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 175-b and may be received at the SMO 180 or the Non-RT RIC 175-a from non-network data sources or from network functions. In some examples, the Non-RT RIC 175-a or the Near-RT RIC 175-b may be configured to tune RAN behavior or performance. For example, the Non-RT RIC 175-a may monitor long-term trends and patterns for performance and employ AI or ML models to perform corrective actions through the SMO 180 (e.g., reconfiguration via O1) or via generation of RAN management policies (e.g., A1 policies) .
[0128] Any one or more of the components, functionalities, or nodes of the network architecture 200 may serve as a downlink transmission point or as an uplink reception point associated with a network entity 105 (such as a network entity 105 as illustrated by and described with reference to FIG. 1) . Additionally, or alternatively, the network architecture 200 may include additional components, functionalities, or nodes that serve as a downlink transmission point or as an uplink reception point associated with a network entity 105. In some aspects, a network entity 105 may use (e.g., leverage) one or multiple uplink reception points, in addition or as an alternative to uplink capabilities at the network entity 105 itself, to increase the uplink coverage provided by the network entity 105.
[0129] In some implementations, a UE 115 and a network entity 105 may support one or more configuration-or signaling-based mechanisms according to which the UE 115 may generate and transmit a PHR including one or both of a Type 1 power headroom value and a Type 3 power headroom value for a serving cell, and according to which the network entity 105 may receive and parse the PHR. In some examples, whether a Type 3 power headroom value is able to be reported by the UE 115 via a PHR MAC-CE when PUSCH is configured in the serving cell may be based on a criterion. In some aspects, such a criterion may apply, be activated, or be referenced in accordance with a satisfaction of a specific deployment scenario or operating condition. For example, the UE 115 and the network entity 105 may apply, activate, or reference the criterion (to determine whether to include one or both of a Type 1 power headroom value and a Type 3 power headroom value for the serving cell in the PHR) in accordance with the serving cell being configured with a PUSCH (e.g., a PUSCH allocation) or in accordance with an indicated TCI state being associated with a pathloss offset, or both. Additionally, or alternatively, the UE 115 and the network entity 105 may support one or more PHR formats according to which the PHR may include one or more bits or one or more fields, or any combination thereof, indicating whether the PHR includes one or both of a Type 1 power headroom value and a Type 3 power headroom value for the serving cell.
[0130] FIG. 3 shows an example of an uplink dense deployment 300 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The uplink dense deployment 300 may implement or be implemented to realize aspects of the wireless communications system 100 or the network architecture 200. For example, the uplink dense deployment 300 illustrates a system including a downlink transmission point 305 and uplink reception points 310 connected with the downlink transmission point 305 via backhaul links 315. In some implementations, the downlink transmission point 305 and the uplink reception points 310 may be associated with a network entity 105, such as a network entity 105 as illustrated by or described with reference to FIGs. 1 and 2. Further, although illustrated as including multiple uplink reception points 310, the uplink dense deployment 300 may include any quantity of one or more uplink reception points 310.
[0131] The uplink dense deployment 300 may be understood as or associated with an asymmetric downlink single transmission and reception point (sTRP) / uplink multi-transmission and reception point (mTRP) deployment scenarios, in intra-band intra-cell non-collocated mTRP scenarios, and with a unified TCI framework for mTRP (using, such as communicating via, FR1 or FR2) . In some aspects, the uplink dense deployment 300 may support two closed-loop power control adjustment states for SRS, both separate from PUSCH, and pathloss offset configurations for pathloss calculation to uplink TRP (s) , when the pathloss reference signal is from a downlink sTRP (e.g., the downlink transmission point 305) . The uplink dense deployment 300 may further support multi-downlink control information (DCI) -based two transmitter address toward uplink TRP (s) and downlink sTRP.
[0132] The network entity 105 may refer to a base station, a gNB, or another entity or node that controls or is otherwise associated with (such as connected with via a backhaul link) one or more uplink reception points 310. Thus, the network entity 105 may be understood as including one or more uplink reception points 310 and / or as being communicatively coupled with the one or more uplink reception points 310 (via, for example, one or more backhaul links 315, which may be wired or wireless) . Accordingly, the network entity 105 may receive or otherwise obtain uplink signaling from one or more UEs 115 via one or more uplink reception points 310.
[0133] The network entity 105 may also include or otherwise control the downlink transmission point 305 via which the network entity 105 transmits downlink signals or channels. Such a downlink transmission point 305 may be associated with (e.g., may be) a macro node associated with the network entity 105, a central node associated with the network entity 105, a serving cell associated with the network entity 105, or a serving base station associated with the network entity 105. The network entity 105 may support both uplink and downlink communication via its collocated (or approximately collocated) antenna panels and may use the one or more uplink reception points 310 to supplement the uplink coverage or capacity provided by the network entity 105. For example, the network entity 105 may be collocated with the downlink transmission point 305, may additionally include uplink reception capabilities via one or more antenna panels, and may control or otherwise be associated with the (non-collocated) uplink reception points 310 to supplement uplink coverage and capacity.
[0134] In other words, the uplink dense deployment 300 may be configured or allocated to improve coverage and / or capacity of uplink communication and may be associated with an asymmetric downlink / uplink densification. By providing and using the uplink reception points 310, the network entity 105 may reduce uplink pathloss, which may be helpful in scenarios in which uplink coverage is a bottleneck for uplink communication, and in terms of deployment cost and / or complexity because the uplink reception points 310 may not transmit any downlink signaling. Instead, an uplink reception point 310 may receive an uplink signal or channel and send (e.g., forward, relay, or transmit) the signal or channel (or information parsed or decoded from the signal or channel) to the network entity 105 (e.g., the macro node) . An uplink reception point 310 may send the signal or channel (or information parsed or decoded therefrom) to the network entity 105 with complete or partial processing or without any processing of the received uplink signal or channel.
[0135] In some scenarios, the downlink transmission point 305 and at least one of the one or more uplink reception points 310 may be associated with a same serving cell of a UE 115, and the serving cell may be associated with or have a PUSCH allocation (e.g., a PUSCH configuration) . Further, in some scenarios, an indicated joint or uplink TCI state used by the UE 115 may be associated with a pathloss offset (e.g., an offset or difference between a first pathloss between the downlink transmission point 305 and the UE 115 and a second pathloss between the UE 115 and at least one of the uplink reception points 310) . In the example of the uplink dense deployment 300, a UE 115 may receive signaling from the network via a downlink 320 and transmit signaling to the network via an uplink 325. The UE 115 may use the pathloss offset associated with the indicated joint or uplink TCI state as part of an uplink power control operation at the UE 115.
[0136] In such scenarios in which the serving cell is associated with the PUSCH allocation (for an uplink data transfer to an uplink reception point 310) and in which the indicated joint or uplink TCI is associated with a pathloss offset (which may be at least implicitly indicative of operation by the UE 115 in an uplink dense deployment) , the UE 115 may selectively include one or both of a Type 1 power headroom value and a Type 3 power headroom value within a PHR transmitted by the UE 115. For example, because the downlink transmission point 305 may use SRS transmissions by the UE 115 to determine, calculate, estimate, acquire, or identify downlink CSI from the downlink transmission point 305 to the UE 115, and because the UE 115 performs PUSCH transmissions to an uplink reception point 310 that is non-collocated with the downlink transmission point 305, the network entity 105 may use both Type 1 power headroom values and Type 3 power headroom values to control uplink transmit powers used by the UE 115. For example, the network entity 105 may use a reported Type 1 power headroom value for transmit power control (TPC) adjustment commands associated with PUSCH transmissions by the UE 115 and may use a reported Type 3 power headroom value for TPC adjustment commands associated with SRS transmissions by the UE 115.
[0137] FIG. 4 shows an example of a signaling diagram 400 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The signaling diagram 400 may implement or be implemented to realize one or more aspects of the wireless communications system 100, the network architecture 200, or the uplink dense deployment 300. For example, the signaling diagram 400 illustrates communication between a UE 115, a downlink transmission point 305, and an uplink reception point 310, which may be examples of corresponding devices as illustrated and described herein, including by and with reference to FIGs. 1–3.
[0138] In accordance with operating within an uplink dense deployment, such as the uplink dense deployment 300, the UE 115 may perform a PUSCH transmission 405 to the uplink reception point 310 (e.g., as part of uplink communication to the network) and may perform an SRS transmission 410 to the downlink transmission point 305 (e.g., to facilitate downlink CSI acquisition by the downlink transmission point 305) . Accordingly, a network entity 105 associated with the downlink transmission point 305 and the uplink reception point 310 may expect to receive, via one or more PHRs, both Type 1 power headroom values and Type 3 power headroom values (such as to control uplink transmit power for both PUSCH transmissions and SRS transmissions) .
[0139] In some implementations, the UE 115 and the network entity 105 may support one or more mechanisms according to which the UE 115 may transmit a PHR 415 based on a criterion 430. The criterion 430 may be based on a serving cell associated with the downlink transmission point 305 and the uplink reception point 310 being associated with a PUSCH allocation and an indicated (joint or uplink) TCI state at the UE 115 being associated with a pathloss offset. In accordance with the criterion 430, the PHR 415 may include a Type 1 power headroom value 420 or a Type 3 power headroom value 425, or both. The criterion 430 may specify or indicate one of various potential rules according to which the Type 1 power headroom value 420 or the Type 3 power headroom value 425, or both, are included in the PHR 415 in accordance with whether the PHR 415 is able to convey a single power headroom value for the serving cell (e.g., a component carrier) or is able to convey multiple power headroom values for the serving cell (e.g., the component carrier) .
[0140] The criterion 430 may be a rule provided by a network specification. Additionally, or alternatively, the criterion 430 may be a rule or indication received via signaling (such as via RRC signaling, one or more MAC-CEs, or one or more DCI formats, or any combination thereof) . Additionally, or alternatively, the criterion 430 may be retrieved from one or more memories associated with a wireless communication device, with such one or more memories associated with the wireless communication device being one or more memories located at the wireless communication device, one or more memories located at a different physical location than the wireless communication device, or any combination thereof. The criterion 430 may be applicable to various scenarios or may be activated, triggered, referenced, or used in one or more specific scenarios.
[0141] In examples in which the PHR 415 is able to convey (e.g., indicate, provide, or include) a single power headroom value for one serving cell (e.g., for one component carrier) , the criterion 430 may depend on whether the Type 1 and Type 3 power headroom values are based reference transmissions or actual transmissions. For example, if both the Type 1 power headroom value 420 and the Type 3 power headroom value 425 are based on respective reference transmissions (e.g., a reference PUSCH transmission 405 and a reference SRS transmission 410, respectively) , the criterion 430 may indicate that the UE 115 is to provide the Type 1 power headroom value 420 via the PHR 415, may indicate that the UE 115 is to provide the Type 3 power headroom value 425 via the PHR 415, or may indicate that whether the UE 115 provides the Type 1 power headroom value 420 or the Type 3 power headroom value 425 via the PHR 415 is based on an RRC configuration. For example, a first RRC configuration (e.g., an RRC parameter or a value of the RRC parameter) may indicate that the UE 115 is to provide the Type 1 power headroom value 420 via the PHR 415 and a second RRC configuration (e.g., an RRC parameter or a value of the RRC parameter) may indicate that the UE 115 is to provide the Type 3 power headroom value 425 via the PHR 415.
[0142] By way of further example, if the Type 1 power headroom value 420 is based on a reference transmission (e.g., a reference PUSCH transmission 405) and the Type 3 power headroom value 425 is based on an actual transmission (e.g., an actual SRS transmission 410) , the criterion 430 may indicate that the UE 115 is to provide the Type 3 power headroom value 425 via the PHR 415. By way of further example, if the Type 1 power headroom value 420 is based on an actual transmission (e.g., an actual PUSCH transmission 405) and the Type 3 power headroom value 425 is based on a reference transmission (e.g., a reference SRS transmission 410) , the criterion 430 may indicate that the UE 115 is to provide the Type 1 power headroom value 420.
[0143] By way of further example, if both the Type 1 power headroom value 420 and the Type 3 power headroom value 425 are based on respective actual transmissions (e.g., an actual PUSCH transmission 405 and an actual SRS transmission 410, respectively) , the criterion 430 may indicate that the UE 115 is to provide the Type 1 power headroom value 420 via the PHR 415, may indicate that the UE 115 is to provide the Type 3 power headroom value 425 via the PHR 415, or may indicate that whether the UE 115 provides the Type 1 power headroom value 420 or the Type 3 power headroom value 425 is based on an RRC configuration. For example, a first RRC configuration (e.g., an RRC parameter or a value of the RRC parameter) may indicate that the UE 115 is to provide the Type 1 power headroom value 420 via the PHR 415 and a second RRC configuration (e.g., an RRC parameter or a value of the RRC parameter) may indicate that the UE 115 is to provide the Type 3 power headroom value 425 via the PHR 415.
[0144] In examples in which the PHR 415 is able to convey (e.g., indicate, provide, or include) multiple (e.g., at least two) power headroom values for one serving cell (e.g., for one component carrier) , the criterion 430 may indicate that the UE 115 is to provide both the Type 1 power headroom value 420 and the Type 3 power headroom value 425 via the PHR 415. By way of further example, the criterion 430 may enable a dynamic quantity of power headroom values for one serving cell (e.g., for one component carrier) to be provided via the PHR 415. In such examples, the criterion 430 may indicate that the UE 115 provides both the Type 1 power headroom value 420 and the Type 3 power headroom value 425 via the PHR 415 if the indicated joint / uplink TCI state is associated with a pathloss offset (which may be indicative of communication with a downlink transmission point 305 that is non-collocated with an uplink reception point 310, or indicative that the UE 115 transmits PUSCH signaling to an “uplink only TRP” ) . Otherwise, if the indicated joint / uplink TCI state is not associated with a pathloss offset, the criterion 430 may indicate that the UE 115 provides the Type 1 power headroom value 420 via the PHR 415.
[0145] In some implementations, the criterion 430 may be based on, associated with, or otherwise in accordance with a UE capability. In other words, the criterion 430 may be capped by a capability of the UE 115. For example, if the UE 115 is unable to support reporting multiple (e.g., at least two) power headroom values for one serving cell (e.g., for one component carrier) , the UE 115 may use a criterion 430 according to which the PHR 415 includes a single power headroom value (e.g., one of the Type 1 power headroom value 420 or the Type 3 power headroom value 425) . Alternatively, if the UE 115 is able to report multiple (e.g., at least two) power headroom values for one serving cell (e.g., for one component carrier) , the UE 115 may use a criterion 430 according to which the PHR 415 could include one or both of the Type 1 power headroom value 420 and the Type 3 power headroom value 425. Thus, the UE 115 (and the network entity 105) may use a first criterion 430 in accordance with a first capability of the UE 115 or may use a second criterion 430 in accordance with a second capability of the UE 115.
[0146] As described herein, an “actual transmission” may refer to a transmission that the UE 115 has actually performed, such as a transmission that the UE 115 has previously performed or that the UE 115 will soon perform. Thus, a power headroom value based on an actual transmission may be determined based on an uplink transmit power that the UE 115 has or will actually use. A “reference transmission” may refer to a candidate, hypothetical, or possible transmission, which the UE 115 may or may not actually perform. For example, the UE 115 may calculate an uplink transmit power for a reference transmission and may use the calculated uplink transmit power to determine a power headroom value, but the UE 115 may refrain from actually performing the reference transmission.
[0147] In some implementations, the UE 115 and the network entity 105 may support a format of the PHR 415 according to which the PHR 415 may include information indicative of whether the PHR 415 includes, for a given serving cell (e.g., for a given component carrier) , a Type 1 power headroom value 420, a Type 3 power headroom value 425, or both. In other words, the UE 115 may indicate which type (s) of power headroom values are reported for one serving cell (e.g., for one component carrier) in the PHR 415 (a PHR MAC-CE) . In such implementations, whether a Type 3 power headroom value 425 can be reported when PUSCH is configured in the serving cell may be based on the criterion 430, a decision (e.g., an autonomous decision) at the UE 115, or signaling between the UE 115 and a network entity 105, among other examples. Additional details relating to such information indicative of whether the PHR 415 includes a Type 1 power headroom value 420, a Type 3 power headroom value 425, or both are illustrated and described herein, including by and with reference to FIGs. 5–9.
[0148] FIG. 5 shows an example of a PHR format 500 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The PHR format 500 may implement or be implemented to realize or facilitate one or more aspects of the wireless communications system 100, the network architecture 200, the uplink dense deployment 300, or the signaling diagram 400. For example, the PHR format 500 illustrates an example format of the PHR 415, as illustrated by and described with reference to FIG. 4, according to which a UE 115 may indicate whether the PHR 415 includes, for a given serving cell, a Type 1 power headroom value 420 (as shown in FIG. 4) or a Type 3 power headroom value 425 (as also shown in FIG. 4) .
[0149] For example, the PHR format 500 may include an indication in the PHR 415 to indicate whether the reported power headroom value is a Type 1 power headroom value 420 or a Type 3 power headroom value 425. The UE 115 may add the indication in a set of fields 505, which may be denoted as “L” fields in the example of the PHR format 500. The set of fields 505 may be located in a second octet of the PHR 415, such as subsequent to a first octet indicative of for which serving cells a power headroom value is reported. The set of fields 505 may include a first field L1 indicative of whether a power headroom value reported for a first serving cell (corresponding to ServCellIndex 1) is a Type 1 power headroom value 420 or a Type 3 power headroom value 425, a second field L2 indicative of whether a power headroom value reported for a second serving cell (corresponding to ServCellIndex 2) is a Type 1 power headroom value 420 or a Type 3 power headroom value 425, and so on. For example, the field 510 (e.g., a power headroom field) associated with the first serving cell may include either a Type 1 power headroom value 420 or a Type 3 power headroom value 425 in accordance with the indication provided via the L1 field.
[0150] In some aspects, each field of the set of fields 505 may include a single bit. In such aspects, a first value of the single bit may indicate that a Type 1 power headroom value 420 is reported for that serving cell and a second value of the single bit may indicate that a Type 3 power headroom value 425 is reported for that serving cell. The first value of the bit may be a “0” or “1” value. The second value of the bit may be the other of the “0” or “1” value. If the PHR 415 does not report a power headroom value for a serving cell, an L field corresponding to the serving cell may be a reserved field or be used for another purpose.
[0151] In some implementations, the PHR 415 may include an indication to indicate whether a reported power headroom associated with a serving cell is includes a Type 1 power headroom value 420 or includes both a Type 1 power headroom value 420 and a Type 3 power headroom value 425. The PHR 415 may provide such an indication via the set of fields 505 or via one or more additional fields, or any combination thereof. Additional details relating to such an indication of whether a reported power headroom associated with a serving cell is includes a Type 1 power headroom value 420 or includes both a Type 1 power headroom value 420 and a Type 3 power headroom value 425 are described herein, including by and with reference to FIG. 6.
[0152] FIG. 6 shows an example of a PHR format 600 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The PHR format 600 may implement or be implemented to realize or facilitate one or more aspects of the wireless communications system 100, the network architecture 200, the uplink dense deployment 300, or the signaling diagram 400. For example, the PHR format 600 illustrates an example format of the PHR 415, as illustrated by and described with reference to FIG. 4, according to which a UE 115 may indicate whether the PHR 415 includes, for a given serving cell, a Type 1 power headroom value 420 (as shown in FIG. 4) or both a Type 1 power headroom value 420 and a Type 3 power headroom value 425 (as also shown in FIG. 4) .
[0153] For example, the PHR format 600 may include an indication in the PHR 415 to indicate whether the reported power headroom value (s) is (are) a Type 1 power headroom value 420 or both a Type 1 power headroom value 420 and a Type 3 power headroom value 425. In some implementations, the indication may be a field for each serving cell (e.g., for each component carrier) within the PHR 415. For example, a set of fields 605 may provide the indication, which may be denoted as “L” fields in the example of the PHR format 600. The set of fields 605 may be located in a second octet of the PHR 415, such as subsequent to a first octet indicative of for which serving cells a power headroom value is reported. The set of fields 605 may include a first field L1 indicative of whether a power headroom reported for a first serving cell (corresponding to ServCellIndex 1) includes a Type 1 power headroom value 420 or both a Type 1 power headroom value 420 and a Type 3 power headroom value 425, a second field L2 indicative of whether a power headroom reported for a second serving cell (corresponding to ServCellIndex 2) includes a Type 1 power headroom value 420 or both a Type 1 power headroom value 420 and a Type 3 power headroom value 425, and so on.
[0154] In some aspects, each field of the set of fields 605 may include a single bit. In such aspects, a first value of the single bit may indicate that a Type 1 power headroom value 420 is reported for that serving cell and a second value of the single bit may indicate that both a Type 1 power headroom value 420 and a Type 3 power headroom value 425 are reported for that serving cell. The first value of the bit may be a “0” or “1” value. The second value of the bit may be the other of the “0” or “1” value. If the PHR 415 does not report a power headroom value for a serving cell, an L field corresponding to the serving cell may be a reserved field or be used for another purpose.
[0155] Additionally, or alternatively, the indication may be provided via one or more of the reserved bits within the PHR 415. For example, a field 610 may include the indication of whether a reported power headroom corresponding to a serving cell (e.g., the first serving cell) includes a Type 1 power headroom value 420 or both a Type 1 power headroom value 420 and a Type 3 power headroom value 425. The field 610 may include a single bit, which may be a most significant bit of an octet in which the field 610 is located. The field 610 may be located in a same octet as a reported power headroom value. A first value of the single bit may indicate that a Type 1 power headroom value 420 is reported for that serving cell and a second value of the bit may indicate that both a Type 1 power headroom value 420 and a Type 3 power headroom value 425 are reported for that serving cell. The first value of the bit may be a “0” or “1” value. The second value of the bit may be the other of the “0” or “1” value.
[0156] Additionally, or alternatively, a field 615 may include the indication of whether a reported power headroom corresponding to a serving cell (e.g., the first serving cell) includes a Type 1 power headroom value 420 or both a Type 1 power headroom value 420 and a Type 3 power headroom value 425. The field 615 may be one of the “MPE or R” field within the PHR 415, and the indication may be one or more of the reserved bits in the “MPE or R” field (e.g., if mpe-Reporting-FR2 is not configured, or if the serving cell operates on FR1, or if the “P” field is set to 0) . A first value of one or more bits within the field 615 may indicate that a Type 1 power headroom value 420 is reported for that serving cell and a second value of the one or more bits within the field 615 may indicate that both a Type 1 power headroom value 420 and a Type 3 power headroom value 425 are reported for that serving cell. The first value may correspond to a “0” or “1” value. The second value may correspond to the other of the “0” or “1” value.
[0157] Thus, in accordance with an indication provided via one or more of a field of the set of fields 605, the field 610, or the field 615, a portion of the PHR 415 associated with the first serving cell may include a field 620 (e.g., a first power headroom field associated with the first serving cell) indicative of a Type 1 power headroom value 420, or may include the field 620 indicative of a Type 1 power headroom value 420 and may further include a field 625 (e.g., a second power headroom field associated with the first serving cell) indicative of a Type 3 power headroom value 425. In examples in which the portion of the PHR 415 associated with the serving cell includes both a Type 1 power headroom value 420 and a Type 3 power headroom value 425, power headroom fields within that portion of the PHR 415 may indicate the Type 1 power headroom value 420 and the Type 3 power headroom value 425 in accordance with an order (e.g., an order expected by both the UE 115 and a network entity 105) . In some aspects, the order may indicate that a Type 1 power headroom value 420 is present in a first octet and that a Type 3 power headroom value 425 is present within a second (subsequent) octet) . In some other aspects, the order may indicate that a Type 3 power headroom value 420 is present in a first octet and that a Type 1 power headroom value 425 is present within a second (subsequent) octet) . The order may be provided by a network specification or via signaling between the UE 115 and a network entity 105, or any combination thereof. Additionally, or alternatively, one or more bits or fields of the PHR 415 may explicitly or implicitly indicate the order.
[0158] FIG. 7 shows an example of a PHR format 700 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The PHR format 700 may implement or be implemented to realize or facilitate one or more aspects of the wireless communications system 100, the network architecture 200, the uplink dense deployment 300, or the signaling diagram 400. For example, the PHR format 700 illustrates an example format of the PHR 415, as illustrated by and described with reference to FIG. 4, according to which a UE 115 may indicate whether the PHR 415 includes, for a PCell, a Type 1 power headroom value 420 (as shown in FIG. 4) , a Type 3 power headroom value 425 (as also shown in FIG. 4) , or both.
[0159] In accordance with the PHR format 700, a power headroom reported via a portion of the PHR 415 associated with the PCell may be a Type 1 power headroom value 420 or a Type 3 power headroom value 425 in some specific scenarios, such as in scenarios associated with an uplink dense deployment. In some aspects, in a single power headroom reporting mode (e.g., according to which the PHR 415 may indicate one of a Type 1 power headroom value 420 or a Type 3 power headroom value 425 for at least the PCell) , the power headroom reported for the PCell may be a Type 1 power headroom value 420 or a Type 3 power headroom value 425 in accordance with (e.g., when) a parameter for the corresponding component carrier is configured (e.g., in or via RRC signaling) . For example, if an RRC parameter is present (e.g., configured) or if the RRC parameter is associated with (e.g., set to) a first value, the UE 115 may be able to determine whether to report a Type 1 power headroom value 420 or a Type 3 power headroom value 425 for the PCell. Otherwise, if the RRC parameter is not present or is associated with a second value, the UE 115 may be constrained or expected to report a Type 1 power headroom value 420 for the PCell.
[0160] In examples in which the UE 115 is able to determine whether to report a Type 1 power headroom value 420 or a Type 3 power headroom value 425 for the PCell, the UE 115 may select to report a Type 1 power headroom value 420 or a Type 3 power headroom value 425 in based on a criterion, such as based on a criterion 430 as illustrated by and described with reference to FIG. 4. In this way, the UE 115 and a network entity 105 may have a common (e.g., same) understanding about the type of reported power headroom for the PCell. Further, to increase reliability, the PHR format 700 may enable the PHR 415 to include a field for each serving cell (e.g., for each component carrier) to explicitly indicate a type of the reported power headroom. In such examples, a quantity of the fields indicating the type of the reported power headroom may be equal to the quantity of serving cells or the quantity of serving cells for which a power headroom value is reported in the PHR 415. Additionally, or alternatively, the PHR format 700 may enable the PHR 415 to include a field applicable for a set of (e.g., all) asymmetric downlink / uplink component carriers to explicitly indicate a type of the reported power headroom. In such examples, the set of (e.g., all) asymmetric downlink / uplink component carriers may have a same type of reported power headroom.
[0161] In some examples, the PHR format 700 may be associated with an “MPE or DPC or R” field. In other words, in accordance with the PHR format 700, the PHR 415 may include an “MPE or DPC or R” field. The PHR 415 may include an “MPE or DPC or R” field for each serving cell for which a power headroom value is reported in PHR 415. In some aspects, a “DPC” field (e.g., a “dynamic power control” field) may be indicative of an adjustment to a maximum (e.g., network defined upper limit) output power for a given power class for a serving cell operating on FR1.
[0162] FIG. 8 shows an example of a PHR format 800 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The PHR format 800 may implement or be implemented to realize or facilitate one or more aspects of the wireless communications system 100, the network architecture 200, the uplink dense deployment 300, or the signaling diagram 400. For example, the PHR format 800 illustrates an example format of the PHR 415, as illustrated by and described with reference to FIG. 4, according to which a UE 115 may indicate whether the PHR 415 includes, for a serving cell, a Type 1 power headroom value 420 (as shown in FIG. 4) , a Type 3 power headroom value 425 (as also shown in FIG. 4) , or both.
[0163] In accordance with the PHR format 800, the UE 115 and a network entity 105 may reuse an mTRP PHR MAC-CE to report both a Type 1 power headroom value 420 and a Type 3 power headroom value 425 for each serving cell (e.g., for each component carrier) . In such examples, the UE 115 and the network entity 105 may determine or select to use an mTRP PHR MAC-CE, even though the indicated TCI state may be associated with a single joint / uplink TCI state (which may be indicative of an sTRP communication mode) , in accordance with a satisfaction of a specific operating condition (e.g., operation in an uplink dense deployment) .
[0164] Additionally, or alternatively, in an sTRP mode, the PHR 415 may include two power headroom values for a serving cell in accordance with (e.g., when) a parameter associated with (e.g., in) the serving cell is configured in or via RRC signaling. The parameter may mean or be associated with an asymmetric downlink / uplink scenario. For example, if an RRC parameter associated with the serving cell is present (e.g., configured) or if the RRC parameter is associated with (e.g., set to) a first value, the UE 115 may include two power headroom fields within a portion of the PHR 415 associated the serving cell. Otherwise, if the RRC parameter is not present or is associated with a second value, the UE 115 may be expected to include a single (and not more than one) power headroom field within the portion of the PHR 415.
[0165] In examples in which the UE 115 may include two power headroom fields within a portion of the PHR 415 associated the serving cell, and if the UE 115 determines to report both a Type 1 power headroom value 420 and a Type 3 power headroom value 425, the UE 115 may generate the PHR 415 in accordance with a specific order of the Type 1 power headroom value 420 and the Type 3 power headroom value 425. In some aspects, the order may specify that the Type 1 power headroom value 420 is present with a first octet and that the Type 3 power headroom value 425 is present with a second (subsequent) octet. In some other aspects, the order may specify that the Type 3 power headroom value 420 is present with a first octet and that the Type 1 power headroom value 425 is present with a second (subsequent) octet.
[0166] FIG. 9 shows an example of a PHR format 900 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The PHR format 900 may implement or be implemented to realize or facilitate one or more aspects of the wireless communications system 100, the network architecture 200, the uplink dense deployment 300, or the signaling diagram 400. For example, the PHR format 900 illustrates an example format of the PHR 415, as illustrated by and described with reference to FIG. 4, according to which a UE 115 may indicate whether the PHR 415 includes, for a serving cell, a Type 1 power headroom value 420 (as shown in FIG. 4) , a Type 3 power headroom value 425 (as also shown in FIG. 4) , or both.
[0167] In accordance with the PHR format 900, the UE 115 and a network entity 105 may support a dedicated PHR MAC-CE with two entries (e.g., two power headroom fields) per activated serving cell. In some examples, a first of the two entries may be for a Type 1 power headroom value 420 and a second of the two entries may be for a Type 3 power headroom value 425. In such examples, in an sTRP mode, the UE 115 and the network entity 105 may use such a dedicated PHR MAC-CE (e.g., associated with the PHR format 900) in accordance with (e.g., when) a parameter associated with (e.g., in) the serving cell is configured in or via RRC signaling. The parameter may mean or be associated with an asymmetric downlink / uplink scenario. For example, if an RRC parameter associated with the serving cell is present (e.g., configured) or if the RRC parameter is associated with (e.g., set to) a first value, the UE 115 may use the PHR format 900 (such that two entries exist in a portion of the PHR 415 associated with the serving cell) . Otherwise, if the RRC parameter is not present or is associated with a second value, the UE 115 may use a different PHR format (such that a single entry exists in the portion of the PHR 415 associated with the serving cell) .
[0168] In examples in which the UE 115 uses the PHR format 900 with two entries (e.g., two power headroom fields) within a portion of the PHR 415 associated the serving cell, and if the UE 115 determines to report both a Type 1 power headroom value 420 and a Type 3 power headroom value 425, the UE 115 may generate the PHR 415 in accordance with a specific order of the Type 1 power headroom value 420 and the Type 3 power headroom value 425. In some aspects, the order may specify that the Type 1 power headroom value 420 is present with a first octet and that the Type 3 power headroom value 425 is present with a second (subsequent) octet. In some other aspects, the order may specify that the Type 3 power headroom value 420 is present with a first octet and that the Type 1 power headroom value 425 is present with a second (subsequent) octet.
[0169] FIG. 10 shows an example of a process flow 1000 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The process flow 1000 may implement or be implemented to realize or facilitate one or more aspects of the wireless communications system 100, the network architecture 200, the uplink dense deployment 300, the signaling diagram 400, the PHR format 500, the PHR format 600, the PHR format 700, the PHR format 800, or the PHR format 900. For example, the process flow 1000 illustrates communication between a UE 115 and a network entity 105, which may be examples of corresponding devices as illustrated and described herein. In some implementations, the network entity 105 may be associated with a downlink transmission point 305 (as shown in FIGs. 3 and 4) and one or more uplink reception points 310 (as also shown in FIGs. 3 and 4) that are non-collocated with the downlink transmission point 305.
[0170] Alternative examples of the following may be implemented. Some steps are performed in a different order than described or are not performed at all. In some implementations, steps may include additional features not mentioned below, or further steps may be added. Further, although the UE 115 and the network entity 105 are shown performing the operations of the process flow 1000, some aspects of some operations may also be performed by one or more other wireless communication devices (such as by multiple network entities 105, or in accordance with coordination among multiple network entities 105) .
[0171] At 1005, the UE 115 may transmit, to the network entity 105, information indicative of a capability of the UE 115. The information (e.g., one or more parameters or indications) may indicate whether the UE 115 is capable of reporting multiple power headroom values for a given serving cell within a PHR 415 (as shown in FIG. 4) or is capable of reporting a single power headroom value for a given serving cell within a PHR 415, potentially along with other UE capability or assistance information. Additionally, or alternatively, the information may indicate a criterion 430 supported by the UE 115, or multiple criteria supported by the UE 115, according to which the UE 115 is able to determine whether to include, within a PHR 415, one or both of a Type 1 power headroom value 420 (as shown in FIG. 4) or a Type 3 power headroom value 425 (as also shown in FIG. 4) . Additionally, or alternatively, the information may indicate which of one or more PHR formats the UE 115 supports, such as one or more of the PHR format 500, the PHR format 600, the PHR format 700, the PHR format 800, or the PHR format 900.
[0172] At 1010, the UE 115 may receive, from the network entity 105, control signaling. The control signaling may include RRC signaling (e.g., one or more RRC parameters) , one or more MAC-CEs, one or more DCI formats, or any combination thereof. The control signaling may indicate information that the UE 115 may use in generating and transmitting a PHR 415. For example, the control signaling may indicate whether the UE 115 is to include one or both of a Type 1 power headroom value 420 or a Type 3 power headroom value 425 in a PHR 415. Additionally, or alternatively, the control signaling may indicate which PHR format to use for a PHR 415, such as which of the PHR format 500, the PHR format 600, the PHR format 700, the PHR format 800, or the PHR format 900.
[0173] Additionally, or alternatively, the control signaling may include information indicative of a pathloss reference signal associated with uplink power control at the UE 115. For example, the UE 115 may receive an indication of a pathloss reference signal from the network entity 105 via RRC signaling, such as via a PUSCH-PathlossReferenceRS parameter, a PUCCH-PathlossReferenceRS parameter, or a pathlossReferenceRS parameter. Additionally, or alternatively, the control signaling may include information indicative of one or more pathloss offsets associated with the uplink power control. In some aspects, the UE 115 may receive the information indicative of the one or more pathloss offsets via L1 / L2 signaling or via L3 signaling, such as via one or more DCI formats, one or more MAC-CEs, or RRC signaling. In some aspects, a DCI message or a MAC-CE may include an indication of a (e.g., single) pathloss offset, such that multiple pathloss offsets may be received over time via multiple DCI formats or multiple MAC-CEs, or any combination thereof. The UE 115 may receive the information indicative of the pathloss offsets for application to a nominal pathloss, an uplink pathloss, or a downlink pathloss.
[0174] At 1015, the UE 115 may receive, from the network entity 105, information indicative of an uplink shared channel (e.g., a PUSCH) allocation associated with a serving cell of the UE 115. The UE 115 may receive such information via one or more of various types of signaling, such as via RRC signaling. In other words, the UE 115 may receive an indication of a PUSCH configuration for the serving cell of the UE 115 (which may enable the UE 115 to perform PUSCH transmissions to the network entity 105) .
[0175] At 1020, the UE 115 may receive, from the network entity 105, information indicative of a TCI state associated with the serving cell. The UE 115 may receive the information indicative of the TCI state associated with the serving cell via one or more of various types of signaling, such as via a DCI format, a MAC-CE, or RRC signaling. The TCI state may be a joint or uplink TCI state. Further, in some scenarios, the TCI state may be associated with a pathloss offset, such as a pathloss offset indicated by the network entity 105 at 1010. In some aspects, the TCI state being associated with the pathloss offset may be indicative of a use, by the network entity 105, of at least one uplink reception point 310 via which the network entity 105 may obtain uplink signaling from the UE 115. The uplink reception point 310 may be non-collocated with a downlink transmission point 305 associated with the network entity 105, such that uplink and downlink signaling between the UE 115 and the network may have different pathlosses.
[0176] At 1025, the UE 115 may transmit, to the network entity 105, a PHR 415. The PHR 415 may be based on a criterion 430 (as shown in FIG. 4) . For example, the PHR 415 may include one or both of a Type 1 power headroom value 420 or a Type 3 power headroom value 425 based on or otherwise in accordance with the criterion 430. In some implementations, the criterion 430 may be based on the serving cell being associated with the uplink shared channel allocation (e.g., the PUSCH allocation or configuration) and the indicated TCI state being associated with the pathloss offset. In other words, the criterion 430 may be used, activated, referenced, or triggered in accordance with (e.g., when) the UE 115 is in an uplink dense deployment scenario with a PUSCH configured.
[0177] At 1030, the UE 115 may receive, from the network entity 105, a TPC command. In some examples, the UE 115 may receive multiple TPC commands. The UE 115 may receive the TPC command (s) in association with transmitting the PHR 415. The TPC command (s) may be based on the power headroom values indicated by the PHR 415. For example, the TPC command (s) may indicate the UE 115 to increase or decrease one or both of a PUSCH transmit power and an SRS transmit power depending on whether the PHR 415 indicated one or both of a Type 1 power headroom value 420 or a Type 3 power headroom value 425, respectively.
[0178] FIG. 11 shows a block diagram 1100 of a device 1105 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The device 1105 may be an example of aspects of a UE 115 as described herein. The device 1105 may include a receiver 1110, a transmitter 1115, and a communications manager 1120. The device 1105, or one or more components of the device 1105 (e.g., the receiver 1110, the transmitter 1115, the communications manager 1120) , may include at least one processor, which may be coupled with at least one memory, to, individually or collectively, support or enable the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
[0179] The receiver 1110 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for power headroom reporting in uplink dense deployments) . Information may be passed on to other components of the device 1105. The receiver 1110 may utilize a single antenna or a set of multiple antennas.
[0180] The transmitter 1115 may provide a means for transmitting signals generated by other components of the device 1105. For example, the transmitter 1115 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for power headroom reporting in uplink dense deployments) . In some examples, the transmitter 1115 may be co-located with a receiver 1110 in a transceiver component. The transmitter 1115 may utilize a single antenna or a set of multiple antennas.
[0181] The communications manager 1120, the receiver 1110, the transmitter 1115, or various combinations or components thereof may be examples of means for performing various aspects of techniques for power headroom reporting in uplink dense deployments as described herein. For example, the communications manager 1120, the receiver 1110, the transmitter 1115, or various combinations or components thereof may be capable of performing one or more of the functions described herein.
[0182] In some examples, the communications manager 1120, the receiver 1110, the transmitter 1115, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include at least one of a processor, a digital signal processor (DSP) , a central processing unit (CPU) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure. In some examples, at least one processor and at least one memory coupled with the at least one processor may be configured to perform one or more of the functions described herein (e.g., by one or more processors, individually or collectively, executing instructions stored in the at least one memory) .
[0183] Additionally, or alternatively, the communications manager 1120, the receiver 1110, the transmitter 1115, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by at least one processor (e.g., referred to as a processor-executable code) . If implemented in code executed by at least one processor, the functions of the communications manager 1120, the receiver 1110, the transmitter 1115, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure) .
[0184] In some examples, the communications manager 1120 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 1110, the transmitter 1115, or both. For example, the communications manager 1120 may receive information from the receiver 1110, send information to the transmitter 1115, or be integrated in combination with the receiver 1110, the transmitter 1115, or both to obtain information, output information, or perform various other operations as described herein.
[0185] The communications manager 1120 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 1120 is capable of, configured to, or operable to support a means for receiving first information indicative of an uplink shared channel resource allocation associated with a serving cell of the UE. The communications manager 1120 is capable of, configured to, or operable to support a means for receiving second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset. The communications manager 1120 is capable of, configured to, or operable to support a means for transmitting a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0186] By including or configuring the communications manager 1120 in accordance with examples as described herein, the device 1105 (e.g., at least one processor controlling or otherwise coupled with the receiver 1110, the transmitter 1115, the communications manager 1120, or a combination thereof) may support techniques for more efficient or suitable power consumption or more efficient utilization of communication resources, among other benefits.
[0187] FIG. 12 shows a block diagram 1200 of a device 1205 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The device 1205 may be an example of aspects of a device 1105 or a UE 115 as described herein. The device 1205 may include a receiver 1210, a transmitter 1215, and a communications manager 1220. The device 1205, or one or more components of the device 1205 (e.g., the receiver 1210, the transmitter 1215, the communications manager 1220) , may include at least one processor, which may be coupled with at least one memory, to support the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
[0188] The receiver 1210 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for power headroom reporting in uplink dense deployments) . Information may be passed on to other components of the device 1205. The receiver 1210 may utilize a single antenna or a set of multiple antennas.
[0189] The transmitter 1215 may provide a means for transmitting signals generated by other components of the device 1205. For example, the transmitter 1215 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for power headroom reporting in uplink dense deployments) . In some examples, the transmitter 1215 may be co-located with a receiver 1210 in a transceiver component. The transmitter 1215 may utilize a single antenna or a set of multiple antennas.
[0190] The device 1205, or various components thereof, may be an example of means for performing various aspects of techniques for power headroom reporting in uplink dense deployments as described herein. For example, the communications manager 1220 may include an PUSCH configuration component 1225, a TCI state component 1230, an power headroom reporting component 1235, or any combination thereof. The communications manager 1220 may be an example of aspects of a communications manager 1120 as described herein. In some examples, the communications manager 1220, or various components thereof, may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 1210, the transmitter 1215, or both. For example, the communications manager 1220 may receive information from the receiver 1210, send information to the transmitter 1215, or be integrated in combination with the receiver 1210, the transmitter 1215, or both to obtain information, output information, or perform various other operations as described herein.
[0191] The communications manager 1220 may support wireless communications in accordance with examples as disclosed herein. The PUSCH configuration component 1225 is capable of, configured to, or operable to support a means for receiving first information indicative of an uplink shared channel resource allocation associated with a serving cell of the UE. The TCI state component 1230 is capable of, configured to, or operable to support a means for receiving second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset. The power headroom reporting component 1235 is capable of, configured to, or operable to support a means for transmitting a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0192] FIG. 13 shows a block diagram 1300 of a communications manager 1320 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The communications manager 1320 may be an example of aspects of a communications manager 1120, a communications manager 1220, or both, as described herein. The communications manager 1320, or various components thereof, may be an example of means for performing various aspects of techniques for power headroom reporting in uplink dense deployments as described herein. For example, the communications manager 1320 may include an PUSCH configuration component 1325, a TCI state component 1330, an power headroom reporting component 1335, an RRC component 1340, a UE capability component 1345, or any combination thereof. Each of these components, or components or subcomponents thereof (e.g., one or more processors, one or more memories) , may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
[0193] The communications manager 1320 may support wireless communications in accordance with examples as disclosed herein. The PUSCH configuration component 1325 is capable of, configured to, or operable to support a means for receiving first information indicative of an uplink shared channel resource allocation associated with a serving cell of the UE. The TCI state component 1330 is capable of, configured to, or operable to support a means for receiving second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset. The power headroom reporting component 1335 is capable of, configured to, or operable to support a means for transmitting a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0194] In some examples, the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the SRS transmit power is associated with a reference SRS transmission. In some examples, the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the reference uplink shared channel transmission.
[0195] In some examples, the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the SRS transmit power is associated with a reference SRS transmission. In some examples, the criterion indicates that the UE includes the second power headroom value in the PHR in accordance with the SRS transmit power being associated with the reference SRS transmission.
[0196] In some examples, the RRC component 1340 is capable of, configured to, or operable to support a means for receiving control signaling indicative of whether to include the first power headroom value or the second power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with a reference uplink shared channel transmission and the SRS transmit power being associated with a reference SRS transmission, where the criterion is associated with the control signaling indicating whether to include the first power headroom value or the second power headroom value in the PHR.
[0197] In some examples, the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the SRS transmit power is associated with an actual SRS transmission. In some examples, the criterion indicates that the UE includes the second power headroom value in the PHR in accordance with the SRS transmit power being associated with the actual SRS transmission.
[0198] In some examples, the uplink shared channel transmit power is associated with an actual uplink shared channel transmission and the SRS transmit power is associated with a reference SRS transmission. In some examples, the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the actual uplink shared channel transmission.
[0199] In some examples, the uplink shared channel transmit power is associated with an actual uplink shared channel transmission and the SRS transmit power is associated with an actual SRS transmission. In some examples, the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the actual uplink shared channel transmission.
[0200] In some examples, the uplink shared channel transmit power is associated with an actual uplink shared channel transmission and the SRS transmit power is associated with an actual SRS transmission. In some examples, the criterion indicates that the UE includes the second power headroom value in the PHR in accordance the SRS transmit power being associated with the actual SRS transmission.
[0201] In some examples, the RRC component 1340 is capable of, configured to, or operable to support a means for receiving control signaling indicative of whether to include the first power headroom value or the second power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with an actual uplink shared channel transmission and the SRS transmit power being associated with an actual SRS transmission, where the criterion is associated with the control signaling indicating whether to include the first power headroom value or the second power headroom value in the PHR.
[0202] In some examples, the criterion indicates that the UE includes both the first power headroom value and the second power headroom value in the PHR in accordance with the first power headroom value and the second power headroom value being available for transmission.
[0203] In some examples, the criterion indicates that the UE includes both the first power headroom value and the second power headroom value in the PHR in accordance with the TCI state being associated with the pathloss offset; or excludes the second power headroom value from the PHR in accordance with the TCI state not being associated with the pathloss offset.
[0204] In some examples, the UE capability component 1345 is capable of, configured to, or operable to support a means for transmitting a message indicative of a capability of the UE associated with including one or both of the first power headroom value and the second power headroom value in the PHR, where transmission of the PHR is in accordance with the capability of the UE, and where the criterion is a first criterion in accordance with the capability of the UE indicating that the UE is capable of including both of the first power headroom value and the second power headroom value in the PHR or the criterion is a second criterion in accordance with the capability of the UE indicating that the UE is incapable of including both of the first power headroom value and the second power headroom value in the PHR.
[0205] In some examples, the PHR includes an indication of whether the PHR includes the first power headroom value or the second power headroom value. In some examples, a first value of the indication indicates that the PHR includes the first power headroom value and a second value of the indication indicates that the PHR includes the second power headroom value. In some examples, a first value of the indication indicates that the PHR includes the first power headroom value and a second value of the indication indicates that the PHR includes the first power headroom value and the second power headroom value.
[0206] In some examples, the PHR includes a field associated with the serving cell of the UE. In some examples, the field includes the indication. In some examples, the PHR includes a field associated with a set of multiple serving cells of the UE including the serving cell. In some examples, the field includes the indication. In some examples, the PHR includes a reserved bit. In some examples, the reserved bit is interpreted as the indication in accordance with the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset.
[0207] In some examples, the RRC component 1340 is capable of, configured to, or operable to support a means for receiving control signaling associated with the serving cell of the UE, where the serving cell of the UE is a PCell, where the control signaling includes a parameter that indicates that PHRs associated with the PCell are able to include the first power headroom value or the second power headroom value, and where transmission of the PHR is in accordance with the control signaling including the parameter.
[0208] In some examples, the RRC component 1340 is capable of, configured to, or operable to support a means for receiving control signaling including a parameter that indicates that the PHR includes a set of multiple power headroom value fields associated with each activated serving cell, where the PHR includes both the first power headroom value and the second power headroom value in accordance with the PHR including the set of multiple power headroom value fields associated with each activated serving cell.
[0209] In some examples, the pathloss offset is associated with an uplink transmit power determination at the UE.
[0210] In some examples, the UE receives the first information and the second information from a first network entity and transmits the PHR to a second network entity. In some examples, the second network entity is an uplink-only node.
[0211] FIG. 14 shows a diagram of a system 1400 including a device 1405 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The device 1405 may be an example of or include components of a device 1105, a device 1205, or a UE 115 as described herein. The device 1405 may communicate (e.g., wirelessly) with one or more other devices (e.g., network entities 105, UEs 115, or a combination thereof) . The device 1405 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager 1420, an input / output (I / O) controller, such as an I / O controller 1410, a transceiver 1415, one or more antennas 1425, at least one memory 1430, code 1435, and at least one processor 1440. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 1445) .
[0212] The I / O controller 1410 may manage input and output signals for the device 1405. The I / O controller 1410 may also manage peripherals not integrated into the device 1405. In some cases, the I / O controller 1410 may represent a physical connection or port to an external peripheral. In some cases, the I / O controller 1410 may utilize an operating system such as or another known operating system. Additionally, or alternatively, the I / O controller 1410 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I / O controller 1410 may be implemented as part of one or more processors, such as the at least one processor 1440. In some cases, a user may interact with the device 1405 via the I / O controller 1410 or via hardware components controlled by the I / O controller 1410.
[0213] In some cases, the device 1405 may include a single antenna. However, in some other cases, the device 1405 may have more than one antenna, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 1415 may communicate bi-directionally via the one or more antennas 1425 using wired or wireless links as described herein. For example, the transceiver 1415 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 1415 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 1425 for transmission, and to demodulate packets received from the one or more antennas 1425. The transceiver 1415, or the transceiver 1415 and one or more antennas 1425, may be an example of a transmitter 1115, a transmitter 1215, a receiver 1110, a receiver 1210, or any combination thereof or component thereof, as described herein.
[0214] The at least one memory 1430 may include random access memory (RAM) and read-only memory (ROM) . The at least one memory 1430 may store computer-readable, computer-executable, or processor-executable code, such as the code 1435. The code 1435 may include instructions that, when executed by the at least one processor 1440, cause the device 1405 to perform various functions described herein. The code 1435 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code 1435 may not be directly executable by the at least one processor 1440 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the at least one memory 1430 may include, among other things, a basic I / O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
[0215] The at least one processor 1440 may include one or more intelligent hardware devices (e.g., one or more general-purpose processors, one or more DSPs, one or more CPUs, one or more graphics processing units (GPUs) , one or more neural processing units (NPUs) (also referred to as neural network processors or deep learning processors (DLPs) ) , one or more microcontrollers, one or more ASICs, one or more FPGAs, one or more programmable logic devices, discrete gate or transistor logic, one or more discrete hardware components, or any combination thereof) . In some cases, the at least one processor 1440 may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the at least one processor 1440. The at least one processor 1440 may be configured to execute computer-readable instructions stored in a memory (e.g., the at least one memory 1430) to cause the device 1405 to perform various functions (e.g., functions or tasks supporting techniques for power headroom reporting in uplink dense deployments) . For example, the device 1405 or a component of the device 1405 may include at least one processor 1440 and at least one memory 1430 coupled with or to the at least one processor 1440, the at least one processor 1440 and the at least one memory 1430 configured to perform various functions described herein.
[0216] In some examples, the at least one processor 1440 may include multiple processors and the at least one memory 1430 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions described herein. In some examples, the at least one processor 1440 may be a component of a processing system, which may refer to a system (such as a series) of machines, circuitry (including, for example, one or both of processor circuitry (which may include the at least one processor 1440) and memory circuitry (which may include the at least one memory 1430) ) , or components, that receives or obtains inputs and processes the inputs to produce, generate, or obtain a set of outputs. The processing system may be configured to perform one or more of the functions described herein. For example, the at least one processor 1440 or a processing system including the at least one processor 1440 may be configured to, configurable to, or operable to cause the device 1405 to perform one or more of the functions described herein. Further, as described herein, being “configured to, ” being “configurable to, ” and being “operable to”may be used interchangeably and may be associated with a capability, when executing code 1435 (e.g., processor-executable code) stored in the at least one memory 1430 or otherwise, to perform one or more of the functions described herein.
[0217] The communications manager 1420 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 1420 is capable of, configured to, or operable to support a means for receiving first information indicative of an uplink shared channel resource allocation associated with a serving cell of the UE. The communications manager 1420 is capable of, configured to, or operable to support a means for receiving second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset. The communications manager 1420 is capable of, configured to, or operable to support a means for transmitting a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0218] By including or configuring the communications manager 1420 in accordance with examples as described herein, the device 1405 may support techniques for improved communication reliability, reduced latency, reduced power consumption, more efficient utilization of communication resources, improved coordination between devices, longer battery life, and improved utilization of processing capability, among other benefits.
[0219] In some examples, the communications manager 1420 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver 1415, the one or more antennas 1425, or any combination thereof. Although the communications manager 1420 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 1420 may be supported by or performed by the at least one processor 1440, the at least one memory 1430, the code 1435, or any combination thereof. For example, the code 1435 may include instructions executable by the at least one processor 1440 to cause the device 1405 to perform various aspects of techniques for power headroom reporting in uplink dense deployments as described herein, or the at least one processor 1440 and the at least one memory 1430 may be otherwise configured to, individually or collectively, perform or support such operations.
[0220] FIG. 15 shows a block diagram 1500 of a device 1505 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The device 1505 may be an example of aspects of a network entity 105 as described herein. The device 1505 may include a receiver 1510, a transmitter 1515, and a communications manager 1520. The device 1505, or one or more components of the device 1505 (e.g., the receiver 1510, the transmitter 1515, the communications manager 1520) , may include at least one processor, which may be coupled with at least one memory, to, individually or collectively, support or enable the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
[0221] The receiver 1510 may provide a means for obtaining (e.g., receiving, determining, identifying) information such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) . Information may be passed on to other components of the device 1505. In some examples, the receiver 1510 may support obtaining information by receiving signals via one or more antennas. Additionally, or alternatively, the receiver 1510 may support obtaining information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.
[0222] The transmitter 1515 may provide a means for outputting (e.g., transmitting, providing, conveying, sending) information generated by other components of the device 1505. For example, the transmitter 1515 may output information such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) . In some examples, the transmitter 1515 may support outputting information by transmitting signals via one or more antennas. Additionally, or alternatively, the transmitter 1515 may support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1515 and the receiver 1510 may be co-located in a transceiver, which may include or be coupled with a modem.
[0223] The communications manager 1520, the receiver 1510, the transmitter 1515, or various combinations or components thereof may be examples of means for performing various aspects of techniques for power headroom reporting in uplink dense deployments as described herein. For example, the communications manager 1520, the receiver 1510, the transmitter 1515, or various combinations or components thereof may be capable of performing one or more of the functions described herein.
[0224] In some examples, the communications manager 1520, the receiver 1510, the transmitter 1515, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include at least one of a processor, a DSP, a CPU, an ASIC, an FPGA or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure. In some examples, at least one processor and at least one memory coupled with the at least one processor may be configured to perform one or more of the functions described herein (e.g., by one or more processors, individually or collectively, executing instructions stored in the at least one memory) .
[0225] Additionally, or alternatively, the communications manager 1520, the receiver 1510, the transmitter 1515, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by at least one processor (e.g., referred to as a processor-executable code) . If implemented in code executed by at least one processor, the functions of the communications manager 1520, the receiver 1510, the transmitter 1515, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure) .
[0226] In some examples, the communications manager 1520 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 1510, the transmitter 1515, or both. For example, the communications manager 1520 may receive information from the receiver 1510, send information to the transmitter 1515, or be integrated in combination with the receiver 1510, the transmitter 1515, or both to obtain information, output information, or perform various other operations as described herein.
[0227] The communications manager 1520 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 1520 is capable of, configured to, or operable to support a means for outputting first information indicative of an uplink shared channel resource allocation associated with a serving cell of a UE. The communications manager 1520 is capable of, configured to, or operable to support a means for outputting second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset. The communications manager 1520 is capable of, configured to, or operable to support a means for obtaining a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0228] By including or configuring the communications manager 1520 in accordance with examples as described herein, the device 1505 (e.g., at least one processor controlling or otherwise coupled with the receiver 1510, the transmitter 1515, the communications manager 1520, or a combination thereof) may support techniques for reduced power consumption and more efficient utilization of communication resources.
[0229] FIG. 16 shows a block diagram 1600 of a device 1605 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The device 1605 may be an example of aspects of a device 1505 or a network entity 105 as described herein. The device 1605 may include a receiver 1610, a transmitter 1615, and a communications manager 1620. The device 1605, or one or more components of the device 1605 (e.g., the receiver 1610, the transmitter 1615, the communications manager 1620) , may include at least one processor, which may be coupled with at least one memory, to support the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
[0230] The receiver 1610 may provide a means for obtaining (e.g., receiving, determining, identifying) information such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) . Information may be passed on to other components of the device 1605. In some examples, the receiver 1610 may support obtaining information by receiving signals via one or more antennas. Additionally, or alternatively, the receiver 1610 may support obtaining information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.
[0231] The transmitter 1615 may provide a means for outputting (e.g., transmitting, providing, conveying, sending) information generated by other components of the device 1605. For example, the transmitter 1615 may output information such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) . In some examples, the transmitter 1615 may support outputting information by transmitting signals via one or more antennas. Additionally, or alternatively, the transmitter 1615 may support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1615 and the receiver 1610 may be co-located in a transceiver, which may include or be coupled with a modem.
[0232] The device 1605, or various components thereof, may be an example of means for performing various aspects of techniques for power headroom reporting in uplink dense deployments as described herein. For example, the communications manager 1620 may include an PUSCH component 1625, a TCI state component 1630, an uplink power control component 1635, or any combination thereof. The communications manager 1620 may be an example of aspects of a communications manager 1520 as described herein. In some examples, the communications manager 1620, or various components thereof, may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 1610, the transmitter 1615, or both. For example, the communications manager 1620 may receive information from the receiver 1610, send information to the transmitter 1615, or be integrated in combination with the receiver 1610, the transmitter 1615, or both to obtain information, output information, or perform various other operations as described herein.
[0233] The communications manager 1620 may support wireless communications in accordance with examples as disclosed herein. The PUSCH component 1625 is capable of, configured to, or operable to support a means for outputting first information indicative of an uplink shared channel resource allocation associated with a serving cell of a UE. The TCI state component 1630 is capable of, configured to, or operable to support a means for outputting second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset. The uplink power control component 1635 is capable of, configured to, or operable to support a means for obtaining a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0234] FIG. 17 shows a block diagram 1700 of a communications manager 1720 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The communications manager 1720 may be an example of aspects of a communications manager 1520, a communications manager 1620, or both, as described herein. The communications manager 1720, or various components thereof, may be an example of means for performing various aspects of techniques for power headroom reporting in uplink dense deployments as described herein. For example, the communications manager 1720 may include an PUSCH component 1725, a TCI state component 1730, an uplink power control component 1735, an RRC component 1740, a UE capability component 1745, or any combination thereof. Each of these components, or components or subcomponents thereof (e.g., one or more processors, one or more memories) , may communicate, directly or indirectly, with one another (e.g., via one or more buses) . The communications may include communications within a protocol layer of a protocol stack, communications associated with a logical channel of a protocol stack (e.g., between protocol layers of a protocol stack, within a device, component, or virtualized component associated with a network entity 105, between devices, components, or virtualized components associated with a network entity 105) , or any combination thereof.
[0235] The communications manager 1720 may support wireless communications in accordance with examples as disclosed herein. The PUSCH component 1725 is capable of, configured to, or operable to support a means for outputting first information indicative of an uplink shared channel resource allocation associated with a serving cell of a UE. The TCI state component 1730 is capable of, configured to, or operable to support a means for outputting second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset. The uplink power control component 1735 is capable of, configured to, or operable to support a means for obtaining a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0236] In some examples, the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the SRS transmit power is associated with a reference SRS transmission. In some examples, the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the reference uplink shared channel transmission.
[0237] In some examples, the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the SRS transmit power is associated with a reference SRS transmission. In some examples, the criterion indicates that the UE includes the second power headroom value in the PHR in accordance with the SRS transmit power being associated with the reference SRS transmission.
[0238] In some examples, the RRC component 1740 is capable of, configured to, or operable to support a means for outputting control signaling indicative of whether to include the first power headroom value or the second power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with a reference uplink shared channel transmission and the SRS transmit power being associated with a reference SRS transmission, where the criterion is associated with the control signaling indicating whether to include the first power headroom value or the second power headroom value in the PHR.
[0239] In some examples, the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the SRS transmit power is associated with an actual SRS transmission. In some examples, the criterion indicates that the UE includes the second power headroom value in the PHR in accordance with the SRS transmit power being associated with the actual SRS transmission.
[0240] In some examples, the uplink shared channel transmit power is associated with an actual uplink shared channel transmission and the SRS transmit power is associated with a reference SRS transmission. In some examples, the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the actual uplink shared channel transmission.
[0241] In some examples, the uplink shared channel transmit power is associated with an actual uplink shared channel transmission and the SRS transmit power is associated with an actual SRS transmission. In some examples, the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the actual uplink shared channel transmission.
[0242] In some examples, the uplink shared channel transmit power is associated with an actual uplink shared channel transmission and the SRS transmit power is associated with an actual SRS transmission. In some examples, the criterion indicates that the UE includes the second power headroom value in the PHR in accordance the SRS transmit power being associated with the actual SRS transmission.
[0243] In some examples, the RRC component 1740 is capable of, configured to, or operable to support a means for outputting control signaling indicative of whether to include the first power headroom value or the second power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with an actual uplink shared channel transmission and the SRS transmit power being associated with an actual SRS transmission, where the criterion is associated with the control signaling indicating whether to include the first power headroom value or the second power headroom value in the PHR.
[0244] In some examples, the criterion indicates that the UE includes both the first power headroom value and the second power headroom value in the PHR in accordance with the first power headroom value and the second power headroom value being available for transmission.
[0245] In some examples, the criterion indicates that the UE includes both the first power headroom value and the second power headroom value in the PHR in accordance with the TCI state being associated with the pathloss offset; or excludes the second power headroom value from the PHR in accordance with the TCI state not being associated with the pathloss offset.
[0246] In some examples, the UE capability component 1745 is capable of, configured to, or operable to support a means for obtaining a message indicative of a capability of the UE associated with including one or both of the first power headroom value and the second power headroom value in the PHR, where obtaining the PHR is in accordance with the capability of the UE, and where the criterion is a first criterion in accordance with the capability of the UE indicating that the UE is capable of including both of the first power headroom value and the second power headroom value in the PHR or the criterion is a second criterion in accordance with the capability of the UE indicating that the UE is incapable of including both of the first power headroom value and the second power headroom value in the PHR.
[0247] In some examples, the PHR includes an indication of whether the PHR includes the first power headroom value or the second power headroom value. In some examples, a first value of the indication indicates that the PHR includes the first power headroom value and a second value of the indication indicates that the PHR includes the second power headroom value. In some examples, a first value of the indication indicates that the PHR includes the first power headroom value and a second value of the indication indicates that the PHR includes the first power headroom value and the second power headroom value.
[0248] In some examples, the PHR includes a field associated with the serving cell of the UE. In some examples, the field includes the indication. In some examples, the PHR includes a field associated with a set of multiple serving cells of the UE including the serving cell. In some examples, the field includes the indication. In some examples, the PHR includes a reserved bit. In some examples, the reserved bit is interpreted as the indication in accordance with the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset.
[0249] In some examples, the RRC component 1740 is capable of, configured to, or operable to support a means for outputting control signaling associated with the serving cell of the UE, where the serving cell of the UE is a PCell, where the control signaling includes a parameter that indicates that PHRs associated with the PCell are able to include the first power headroom value or the second power headroom value, and where obtaining the PHR is in accordance with the control signaling including the parameter.
[0250] In some examples, the RRC component 1740 is capable of, configured to, or operable to support a means for outputting control signaling including a parameter that indicates that the PHR includes a set of multiple power headroom value fields associated with each activated serving cell, where the PHR includes both the first power headroom value and the second power headroom value in accordance with the PHR including the set of multiple power headroom value fields associated with each activated serving cell.
[0251] In some examples, the pathloss offset is associated with an uplink transmit power determination at the UE.
[0252] In some examples, the network entity outputs the first information and the second information to the UE and obtains the PHR from the UE via a second network entity. In some examples, the second network entity is an uplink-only node.
[0253] FIG. 18 shows a diagram of a system 1800 including a device 1805 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The device 1805 may be an example of or include components of a device 1505, a device 1605, or a network entity 105 as described herein. The device 1805 may communicate with other network devices or network equipment such as one or more of the network entities 105, UEs 115, or any combination thereof. The communications may include communications over one or more wired interfaces, over one or more wireless interfaces, or any combination thereof. The device 1805 may include components that support outputting and obtaining communications, such as a communications manager 1820, a transceiver 1810, one or more antennas 1815, at least one memory 1825, code 1830, and at least one processor 1835. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 1840) .
[0254] The transceiver 1810 may support bi-directional communications via wired links, wireless links, or both as described herein. In some examples, the transceiver 1810 may include a wired transceiver and may communicate bi-directionally with another wired transceiver. Additionally, or alternatively, in some examples, the transceiver 1810 may include a wireless transceiver and may communicate bi-directionally with another wireless transceiver. In some examples, the device 1805 may include one or more antennas 1815, which may be capable of transmitting or receiving wireless transmissions (e.g., concurrently) . The transceiver 1810 may also include a modem to modulate signals, to provide the modulated signals for transmission (e.g., by one or more antennas 1815, by a wired transmitter) , to receive modulated signals (e.g., from one or more antennas 1815, from a wired receiver) , and to demodulate signals. In some implementations, the transceiver 1810 may include one or more interfaces, such as one or more interfaces coupled with the one or more antennas 1815 that are configured to support various receiving or obtaining operations, or one or more interfaces coupled with the one or more antennas 1815 that are configured to support various transmitting or outputting operations, or a combination thereof. In some implementations, the transceiver 1810 may include or be configured for coupling with one or more processors or one or more memory components that are operable to perform or support operations based on received or obtained information or signals, or to generate information or other signals for transmission or other outputting, or any combination thereof. In some implementations, the transceiver 1810, or the transceiver 1810 and the one or more antennas 1815, or the transceiver 1810 and the one or more antennas 1815 and one or more processors or one or more memory components (e.g., the at least one processor 1835, the at least one memory 1825, or both) , may be included in a chip or chip assembly that is installed in the device 1805. In some examples, the transceiver 1810 may be operable to support communications via one or more communications links (e.g., communication link (s) 125, backhaul communication link (s) 120, a midhaul communication link 162, a fronthaul communication link 168) .
[0255] The at least one memory 1825 may include RAM, ROM, or any combination thereof. The at least one memory 1825 may store computer-readable, computer-executable, or processor-executable code, such as the code 1830. The code 1830 may include instructions that, when executed by one or more of the at least one processor 1835, cause the device 1805 to perform various functions described herein. The code 1830 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code 1830 may not be directly executable by a processor of the at least one processor 1835 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the at least one memory 1825 may include, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices. In some examples, the at least one processor 1835 may include multiple processors and the at least one memory 1825 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories which may, individually or collectively, be configured to perform various functions herein (for example, as part of a processing system) .
[0256] The at least one processor 1835 may include one or more intelligent hardware devices (e.g., one or more general-purpose processors, one or more DSPs, one or more CPUs, one or more graphics processing units (GPUs) , one or more neural processing units (NPUs) (also referred to as neural network processors or deep learning processors (DLPs) ) , one or more microcontrollers, one or more ASICs, one or more FPGAs, one or more programmable logic devices, discrete gate or transistor logic, one or more discrete hardware components, or any combination thereof) . In some cases, the at least one processor 1835 may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into one or more of the at least one processor 1835. The at least one processor 1835 may be configured to execute computer-readable instructions stored in a memory (e.g., one or more of the at least one memory 1825) to cause the device 1805 to perform various functions (e.g., functions or tasks supporting techniques for power headroom reporting in uplink dense deployments) . For example, the device 1805 or a component of the device 1805 may include at least one processor 1835 and at least one memory 1825 coupled with one or more of the at least one processor 1835, the at least one processor 1835 and the at least one memory 1825 configured to perform various functions described herein. The at least one processor 1835 may be an example of a cloud-computing platform (e.g., one or more physical nodes and supporting software such as operating systems, virtual machines, or container instances) that may host the functions (e.g., by executing code 1830) to perform the functions of the device 1805. The at least one processor 1835 may be any one or more suitable processors capable of executing scripts or instructions of one or more software programs stored in the device 1805 (such as within one or more of the at least one memory 1825) .
[0257] In some examples, the at least one processor 1835 may include multiple processors and the at least one memory 1825 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein. In some examples, the at least one processor 1835 may be a component of a processing system, which may refer to a system (such as a series) of machines, circuitry (including, for example, one or both of processor circuitry (which may include the at least one processor 1835) and memory circuitry (which may include the at least one memory 1825) ) , or components, that receives or obtains inputs and processes the inputs to produce, generate, or obtain a set of outputs. The processing system may be configured to perform one or more of the functions described herein. For example, the at least one processor 1835 or a processing system including the at least one processor 1835 may be configured to, configurable to, or operable to cause the device 1805 to perform one or more of the functions described herein. Further, as described herein, being “configured to, ” being “configurable to, ” and being “operable to” may be used interchangeably and may be associated with a capability, when executing code stored in the at least one memory 1825 or otherwise, to perform one or more of the functions described herein.
[0258] In some examples, a bus 1840 may support communications of (e.g., within) a protocol layer of a protocol stack. In some examples, a bus 1840 may support communications associated with a logical channel of a protocol stack (e.g., between protocol layers of a protocol stack) , which may include communications performed within a component of the device 1805, or between different components of the device 1805 that may be co-located or located in different locations (e.g., where the device 1805 may refer to a system in which one or more of the communications manager 1820, the transceiver 1810, the at least one memory 1825, the code 1830, and the at least one processor 1835 may be located in one of the different components or divided between different components) .
[0259] In some examples, the communications manager 1820 may manage aspects of communications with a core network 130 (e.g., via one or more wired or wireless backhaul links) . For example, the communications manager 1820 may manage the transfer of data communications for client devices, such as one or more UEs 115. In some examples, the communications manager 1820 may manage communications with one or more other network entities 105, and may include a controller or scheduler for controlling communications with UEs 115 (e.g., in cooperation with the one or more other network devices) . In some examples, the communications manager 1820 may support an X2 interface within an LTE / LTE-A wireless communications network technology to provide communication between network entities 105.
[0260] The communications manager 1820 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 1820 is capable of, configured to, or operable to support a means for outputting first information indicative of an uplink shared channel resource allocation associated with a serving cell of a UE. The communications manager 1820 is capable of, configured to, or operable to support a means for outputting second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset. The communications manager 1820 is capable of, configured to, or operable to support a means for obtaining a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0261] By including or configuring the communications manager 1820 in accordance with examples as described herein, the device 1805 may support techniques for improved communication reliability, reduced latency, reduced power consumption, more efficient utilization of communication resources, improved coordination between devices, longer battery life, and improved utilization of processing capability.
[0262] In some examples, the communications manager 1820 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the transceiver 1810, the one or more antennas 1815 (e.g., where applicable) , or any combination thereof. Although the communications manager 1820 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 1820 may be supported by or performed by the transceiver 1810, one or more of the at least one processor 1835, one or more of the at least one memory 1825, the code 1830, or any combination thereof (for example, by a processing system including at least a portion of the at least one processor 1835, the at least one memory 1825, the code 1830, or any combination thereof) . For example, the code 1830 may include instructions executable by one or more of the at least one processor 1835 to cause the device 1805 to perform various aspects of techniques for power headroom reporting in uplink dense deployments as described herein, or the at least one processor 1835 and the at least one memory 1825 may be otherwise configured to, individually or collectively, perform or support such operations.
[0263] FIG. 19 shows a flowchart illustrating a method 1900 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The operations of the method 1900 may be implemented by a UE or its components as described herein. For example, the operations of the method 1900 may be performed by a UE 115 as described with reference to FIGs. 1 through 14. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
[0264] At 1905, the method may include receiving first information indicative of an uplink shared channel resource allocation associated with a serving cell of the UE. The operations of 1905 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1905 may be performed by an PUSCH configuration component 1325 as described with reference to FIG. 13.
[0265] At 1910, the method may include receiving second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset. The operations of 1910 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1910 may be performed by a TCI state component 1330 as described with reference to FIG. 13.
[0266] At 1915, the method may include transmitting a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell. The operations of 1915 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1915 may be performed by an power headroom reporting component 1335 as described with reference to FIG. 13.
[0267] FIG. 20 shows a flowchart illustrating a method 2000 that supports techniques for power headroom reporting in uplink dense deployments in accordance with various aspects of the present disclosure. The operations of the method 2000 may be implemented by a network entity or its components as described herein. For example, the operations of the method 2000 may be performed by a network entity as described with reference to FIGs. 1 through 10 and 15 through 18. In some examples, a network entity may execute a set of instructions to control the functional elements of the network entity to perform the described functions. Additionally, or alternatively, the network entity may perform aspects of the described functions using special-purpose hardware.
[0268] At 2005, the method may include outputting first information indicative of an uplink shared channel resource allocation associated with a serving cell of a UE. The operations of 2005 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2005 may be performed by an PUSCH component 1725 as described with reference to FIG. 17.
[0269] At 2010, the method may include outputting second information indicative of a TCI state associated with the serving cell, where the TCI state is associated with a pathloss offset. The operations of 2010 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2010 may be performed by a TCI state component 1730 as described with reference to FIG. 17.
[0270] At 2015, the method may include obtaining a PHR based on a criterion, where the criterion is based on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and where the PHR includes, based on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell. The operations of 2015 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2015 may be performed by an uplink power control component 1735 as described with reference to FIG. 17.
[0271] The following provides an overview of aspects of the present disclosure:
[0272] Aspect 1: A method for wireless communications at a UE, comprising: receiving first information indicative of an uplink shared channel resource allocation associated with a serving cell of the UE; receiving second information indicative of a TCI state associated with the serving cell, wherein the TCI state is associated with a pathloss offset; and transmitting a PHR based at least in part on a criterion, wherein the criterion is based at least in part on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and wherein the PHR includes, based at least in part on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0273] Aspect 2: The method of aspect 1, wherein the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the SRS transmit power is associated with a reference SRS transmission; and the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the reference uplink shared channel transmission.
[0274] Aspect 3: The method of aspect 1, wherein the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the SRS transmit power is associated with a reference SRS transmission; and the criterion indicates that the UE includes the second power headroom value in the PHR in accordance with the SRS transmit power being associated with the reference SRS transmission.
[0275] Aspect 4: The method of any of aspects 1–3, further comprising: receiving control signaling indicative of whether to include the first power headroom value or the second power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with a reference uplink shared channel transmission and the SRS transmit power being associated with a reference SRS transmission, wherein the criterion is associated with the control signaling indicating whether to include the first power headroom value or the second power headroom value in the PHR.
[0276] Aspect 5: The method of aspect 1, wherein the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the SRS transmit power is associated with an actual SRS transmission; and the criterion indicates that the UE includes the second power headroom value in the PHR in accordance with the SRS transmit power being associated with the actual SRS transmission.
[0277] Aspect 6: The method of aspect 1, wherein the uplink shared channel transmit power is associated with an actual uplink shared channel transmission and the SRS transmit power is associated with a reference SRS transmission; and the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the actual uplink shared channel transmission.
[0278] Aspect 7: The method of aspect 1, wherein the uplink shared channel transmit power is associated with an actual uplink shared channel transmission and the SRS transmit power is associated with an actual SRS transmission; and the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the actual uplink shared channel transmission.
[0279] Aspect 8: The method of aspect 1, wherein the uplink shared channel transmit power is associated with an actual uplink shared channel transmission and the SRS transmit power is associated with an actual SRS transmission; and the criterion indicates that the UE includes the second power headroom value in the PHR in accordance the SRS transmit power being associated with the actual SRS transmission.
[0280] Aspect 9: The method of any of aspects 1–8, further comprising: receiving control signaling indicative of whether to include the first power headroom value or the second power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with an actual uplink shared channel transmission and the SRS transmit power being associated with an actual SRS transmission, wherein the criterion is associated with the control signaling indicating whether to include the first power headroom value or the second power headroom value in the PHR.
[0281] Aspect 10: The method of any of aspects 1–9, wherein the criterion indicates that the UE includes both the first power headroom value and the second power headroom value in the PHR in accordance with the first power headroom value and the second power headroom value being available for transmission.
[0282] Aspect 11: The method of any of aspects 1–10, wherein the criterion indicates that the UE includes both the first power headroom value and the second power headroom value in the PHR in accordance with the TCI state being associated with the pathloss offset; or excludes the second power headroom value from the PHR in accordance with the TCI state not being associated with the pathloss offset.
[0283] Aspect 12: The method of any of aspects 1–11, further comprising: transmitting a message indicative of a capability of the UE associated with including one or both of the first power headroom value and the second power headroom value in the PHR, wherein transmission of the PHR is in accordance with the capability of the UE, and wherein the criterion is a first criterion in accordance with the capability of the UE indicating that the UE is capable of including both of the first power headroom value and the second power headroom value in the PHR or the criterion is a second criterion in accordance with the capability of the UE indicating that the UE is incapable of including both of the first power headroom value and the second power headroom value in the PHR.
[0284] Aspect 13: The method of any of aspects 1–12, wherein the PHR includes an indication of whether the PHR includes the first power headroom value or the second power headroom value.
[0285] Aspect 14: The method of aspect 13, wherein a first value of the indication indicates that the PHR includes the first power headroom value and a second value of the indication indicates that the PHR includes the second power headroom value.
[0286] Aspect 15: The method of any of aspects 13–14, wherein a first value of the indication indicates that the PHR includes the first power headroom value and a second value of the indication indicates that the PHR includes the first power headroom value and the second power headroom value.
[0287] Aspect 16: The method of any of aspects 13–15, wherein the PHR includes a field associated with the serving cell of the UE, and the field includes the indication.
[0288] Aspect 17: The method of any of aspects 13–16, wherein the PHR includes a field associated with a plurality of serving cells of the UE including the serving cell, and the field includes the indication.
[0289] Aspect 18: The method of any of aspects 13–17, wherein the PHR includes a reserved bit, and the reserved bit is interpreted as the indication in accordance with the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset.
[0290] Aspect 19: The method of any of aspects 1–18, further comprising: receiving control signaling associated with the serving cell of the UE, wherein the serving cell of the UE is a PCell, wherein the control signaling includes a parameter that indicates that PHRs associated with the PCell are able to include the first power headroom value or the second power headroom value, and wherein transmission of the PHR is in accordance with the control signaling including the parameter.
[0291] Aspect 20: The method of any of aspects 1–19, further comprising: receiving control signaling including a parameter that indicates that the PHR includes a plurality of power headroom value fields associated with each activated serving cell, wherein the PHR includes both the first power headroom value and the second power headroom value in accordance with the PHR including the plurality of power headroom value fields associated with each activated serving cell.
[0292] Aspect 21: The method of any of aspects 1–20, wherein the pathloss offset is associated with an uplink transmit power determination at the UE.
[0293] Aspect 22: The method of any of aspects 1–21, wherein the UE receives the first information and the second information from a first network entity and transmits the PHR to a second network entity, and the second network entity is an uplink-only node.
[0294] Aspect 23: A method for wireless communications at a network entity, comprising: outputting first information indicative of an uplink shared channel resource allocation associated with a serving cell of a UE; outputting second information indicative of a TCI state associated with the serving cell, wherein the TCI state is associated with a pathloss offset; and obtaining a PHR based at least in part on a criterion, wherein the criterion is based at least in part on the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset, and wherein the PHR includes, based at least in part on the criterion, at least one of a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell or a second power headroom value that corresponds to the transmit power limit of the UE minus an SRS transmit power associated with the serving cell.
[0295] Aspect 24: The method of aspect 23, wherein the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the SRS transmit power is associated with a reference SRS transmission; and the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the reference uplink shared channel transmission.
[0296] Aspect 25: The method of aspect 23, wherein the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the SRS transmit power is associated with a reference SRS transmission; and the criterion indicates that the UE includes the second power headroom value in the PHR in accordance with the SRS transmit power being associated with the reference SRS transmission.
[0297] Aspect 26: The method of any of aspects 23–25, further comprising: outputting control signaling indicative of whether to include the first power headroom value or the second power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with a reference uplink shared channel transmission and the SRS transmit power being associated with a reference SRS transmission, wherein the criterion is associated with the control signaling indicating whether to include the first power headroom value or the second power headroom value in the PHR.
[0298] Aspect 27: The method of aspect 23, wherein the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the SRS transmit power is associated with an actual SRS transmission; and the criterion indicates that the UE includes the second power headroom value in the PHR in accordance with the SRS transmit power being associated with the actual SRS transmission.
[0299] Aspect 28: The method of aspect 23, wherein the uplink shared channel transmit power is associated with an actual uplink shared channel transmission and the SRS transmit power is associated with a reference SRS transmission; and the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the actual uplink shared channel transmission.
[0300] Aspect 29: The method of aspect 23, wherein the uplink shared channel transmit power is associated with an actual uplink shared channel transmission and the SRS transmit power is associated with an actual SRS transmission; and the criterion indicates that the UE includes the first power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with the actual uplink shared channel transmission.
[0301] Aspect 30: The method of aspect 23, wherein the uplink shared channel transmit power is associated with an actual uplink shared channel transmission and the SRS transmit power is associated with an actual SRS transmission; and the criterion indicates that the UE includes the second power headroom value in the PHR in accordance the SRS transmit power being associated with the actual SRS transmission.
[0302] Aspect 31: The method of any of aspects 23–30, further comprising: outputting control signaling indicative of whether to include the first power headroom value or the second power headroom value in the PHR in accordance with the uplink shared channel transmit power being associated with an actual uplink shared channel transmission and the SRS transmit power being associated with an actual SRS transmission, wherein the criterion is associated with the control signaling indicating whether to include the first power headroom value or the second power headroom value in the PHR.
[0303] Aspect 32: The method of any of aspects 23–31, wherein the criterion indicates that the UE includes both the first power headroom value and the second power headroom value in the PHR in accordance with the first power headroom value and the second power headroom value being available for transmission.
[0304] Aspect 33: The method of any of aspects 23–32, wherein the criterion indicates that the UE includes both the first power headroom value and the second power headroom value in the PHR in accordance with the TCI state being associated with the pathloss offset; or excludes the second power headroom value from the PHR in accordance with the TCI state not being associated with the pathloss offset.
[0305] Aspect 34: The method of any of aspects 23–33, further comprising: obtaining a message indicative of a capability of the UE associated with including one or both of the first power headroom value and the second power headroom value in the PHR, wherein obtaining the PHR is in accordance with the capability of the UE, and wherein the criterion is a first criterion in accordance with the capability of the UE indicating that the UE is capable of including both of the first power headroom value and the second power headroom value in the PHR or the criterion is a second criterion in accordance with the capability of the UE indicating that the UE is incapable of including both of the first power headroom value and the second power headroom value in the PHR.
[0306] Aspect 35: The method of any of aspects 23–34, wherein the PHR includes an indication of whether the PHR includes the first power headroom value or the second power headroom value.
[0307] Aspect 36: The method of aspect 35, wherein a first value of the indication indicates that the PHR includes the first power headroom value and a second value of the indication indicates that the PHR includes the second power headroom value.
[0308] Aspect 37: The method of any of aspects 35–36, wherein a first value of the indication indicates that the PHR includes the first power headroom value and a second value of the indication indicates that the PHR includes the first power headroom value and the second power headroom value.
[0309] Aspect 38: The method of any of aspects 35–37, wherein the PHR includes a field associated with the serving cell of the UE, and the field includes the indication.
[0310] Aspect 39: The method of any of aspects 35–38, wherein the PHR includes a field associated with a plurality of serving cells of the UE including the serving cell, and the field includes the indication.
[0311] Aspect 40: The method of any of aspects 35–39, wherein the PHR includes a reserved bit, and the reserved bit is interpreted as the indication in accordance with the serving cell being associated with the uplink shared channel resource allocation and the TCI state being associated with the pathloss offset.
[0312] Aspect 41: The method of any of aspects 23–40, further comprising: outputting control signaling associated with the serving cell of the UE, wherein the serving cell of the UE is a PCell, wherein the control signaling includes a parameter that indicates that PHRs associated with the PCell are able to include the first power headroom value or the second power headroom value, and wherein obtaining the PHR is in accordance with the control signaling including the parameter.
[0313] Aspect 42: The method of any of aspects 23–41, further comprising: outputting control signaling including a parameter that indicates that the PHR includes a plurality of power headroom value fields associated with each activated serving cell, wherein the PHR includes both the first power headroom value and the second power headroom value in accordance with the PHR including the plurality of power headroom value fields associated with each activated serving cell.
[0314] Aspect 43: The method of any of aspects 23–42, wherein the pathloss offset is associated with an uplink transmit power determination at the UE.
[0315] Aspect 44: The method of any of aspects 23–43, wherein the network entity outputs the first information and the second information to the UE and obtains the PHR from the UE via a second network entity, and the second network entity is an uplink-only node.
[0316] Aspect 45: A UE for wireless communications, comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to perform a method of any of aspects 1–22.
[0317] Aspect 46: A UE for wireless communications, comprising at least one means for performing a method of any of aspects 1–22.
[0318] Aspect 47: A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by one or more processors to perform a method of any of aspects 1–22.
[0319] Aspect 48: A network entity for wireless communications, comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the network entity to perform a method of any of aspects 23–44.
[0320] Aspect 49: A network entity for wireless communications, comprising at least one means for performing a method of any of aspects 23–44.
[0321] Aspect 50: A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by one or more processors to perform a method of any of aspects 23–44.
[0322] It should be noted that the methods described herein describe possible implementations. The operations and the steps may be rearranged or otherwise modified and other implementations are possible. Further, aspects from two or more of the methods may be combined.
[0323] Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.
[0324] Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0325] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed using a general-purpose processor, a DSP, an ASIC, a CPU, a graphics processing unit (GPU) , a neural processing unit (NPU) , an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor but, in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) . Any functions or operations described herein as being capable of being performed by a processor may be performed by multiple processors that, individually or collectively, are capable of performing the described functions or operations.
[0326] The functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored as or transmitted using one or more instructions or code of a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
[0327] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk, and Blu-ray disc. Disks may reproduce data magnetically, and discs may reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media. Any functions or operations described herein as being capable of being performed by a memory may be performed by multiple memories that, individually or collectively, are capable of performing the described functions or operations.
[0328] As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. ”
[0329] As used herein, including in the claims, the article “a” before a noun is open-ended and understood to refer to “at least one” of those nouns or “one or more” of those nouns. Thus, the terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable. For example, if a claim recites “a component” that performs one or more functions, each of the individual functions may be performed by a single component or by any combination of multiple components. Thus, the term “a component” having characteristics or performing functions may refer to “at least one of one or more components” having a specific characteristic or performing a specific function. Subsequent reference to a component introduced with the article “a” using the terms “the” or “said” may refer to any or all of the one or more components. For example, a component introduced with the article “a” may be understood to mean “one or more components, ” and referring to “the component” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components. ” Similarly, subsequent reference to a component introduced as “one or more components” using the terms “the” or “said” may refer to any or all of the one or more components. For example, referring to “the one or more components” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components. ”
[0330] The term “determine” or “determining” encompasses a variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database, or another data structure) , ascertaining, and the like. Also, “determining” can include receiving (e.g., receiving information) , accessing (e.g., accessing data stored in memory) , and the like. Also, “determining” can include resolving, obtaining, selecting, choosing, establishing, and other such similar actions.
[0331] In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label or other subsequent reference label.
[0332] The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “example” used herein means “serving as an example, instance, or illustration” and not “preferred” or “advantageous over other examples. ” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some figures, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.
[0333] The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.
Claims
1.A method for wireless communications at a user equipment (UE) , comprising:receiving first information indicative of an uplink shared channel resource allocation associated with a serving cell of the UE;receiving second information indicative of a transmission configuration indicator state associated with the serving cell, wherein the transmission configuration indicator state is associated with a pathloss offset; andtransmitting a power headroom report based at least in part on a criterion, wherein the criterion is based at least in part on the serving cell being associated with the uplink shared channel resource allocation and the transmission configuration indicator state being associated with the pathloss offset, and wherein the power headroom report includes, based at least in part on the criterion, at least one of:a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell; ora second power headroom value that corresponds to the transmit power limit of the UE minus a sounding reference signal transmit power associated with the serving cell.2.The method of claim 1, wherein the power headroom report includes an indication of whether the power headroom report includes the first power headroom value or the second power headroom value.3.The method of claim 1, further comprising:receiving control signaling associated with the serving cell of the UE, wherein the serving cell of the UE is a primary cell, wherein the control signaling includes a parameter that indicates that power headroom reports associated with the primary cell are able to include the first power headroom value or the second power headroom value, and wherein transmission of the power headroom report is in accordance with the control signaling including the parameter.4.The method of claim 1, further comprising:receiving control signaling including a parameter that indicates that the power headroom report includes a plurality of power headroom value fields associated with each activated serving cell, wherein the power headroom report includes both the first power headroom value and the second power headroom value in accordance with the power headroom report including the plurality of power headroom value fields associated with each activated serving cell.5.The method of claim 1, wherein the pathloss offset is associated with an uplink transmit power determination at the UE.6.The method of claim 1, wherein:the UE receives the first information and the second information from a first network entity and transmits the power headroom report to a second network entity, andthe second network entity is an uplink-only node.7.A method for wireless communications at a network entity, comprising:outputting first information indicative of an uplink shared channel resource allocation associated with a serving cell of a user equipment (UE) ;outputting second information indicative of a transmission configuration indicator state associated with the serving cell, wherein the transmission configuration indicator state is associated with a pathloss offset; andobtaining a power headroom report based at least in part on a criterion, wherein the criterion is based at least in part on the serving cell being associated with the uplink shared channel resource allocation and the transmission configuration indicator state being associated with the pathloss offset, and wherein the power headroom report includes, based at least in part on the criterion, at least one of:a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell; ora second power headroom value that corresponds to the transmit power limit of the UE minus a sounding reference signal transmit power associated with the serving cell.8.The method of claim 7, wherein:the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the sounding reference signal transmit power is associated with a reference sounding reference signal transmission; andthe criterion indicates that the UE includes the first power headroom value in the power headroom report in accordance with the uplink shared channel transmit power being associated with the reference uplink shared channel transmission.9.The method of claim 7, wherein:the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the sounding reference signal transmit power is associated with a reference sounding reference signal transmission; andthe criterion indicates that the UE includes the second power headroom value in the power headroom report in accordance with the sounding reference signal transmit power being associated with the reference sounding reference signal transmission.10.The method of claim 7, further comprising:outputting control signaling indicative of whether to include the first power headroom value or the second power headroom value in the power headroom report in accordance with the uplink shared channel transmit power being associated with a reference uplink shared channel transmission and the sounding reference signal transmit power being associated with a reference sounding reference signal transmission,wherein the criterion is associated with the control signaling indicating whether to include the first power headroom value or the second power headroom value in the power headroom report.11.The method of claim 7, wherein:the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the sounding reference signal transmit power is associated with an actual sounding reference signal transmission; andthe criterion indicates that the UE includes the second power headroom value in the power headroom report in accordance with the sounding reference signal transmit power being associated with the actual sounding reference signal transmission.12.A user equipment (UE) , comprising:one or more memories storing processor-executable code; andone or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to:receive first information indicative of an uplink shared channel resource allocation associated with a serving cell of the UE;receive second information indicative of a transmission configuration indicator state associated with the serving cell, wherein the transmission configuration indicator state is associated with a pathloss offset; andtransmit a power headroom report based at least in part on a criterion, wherein the criterion is based at least in part on the serving cell being associated with the uplink shared channel resource allocation and the transmission configuration indicator state being associated with the pathloss offset, and wherein the power headroom report includes, based at least in part on the criterion, at least one of:a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell; ora second power headroom value that corresponds to the transmit power limit of the UE minus a sounding reference signal transmit power associated with the serving cell.13.The UE of claim 12, wherein:the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the sounding reference signal transmit power is associated with a reference sounding reference signal transmission; andthe criterion indicates that the UE includes the first power headroom value in the power headroom report in accordance with the uplink shared channel transmit power being associated with the reference uplink shared channel transmission.14.The UE of claim 12, wherein:the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the sounding reference signal transmit power is associated with a reference sounding reference signal transmission; andthe criterion indicates that the UE includes the second power headroom value in the power headroom report in accordance with the sounding reference signal transmit power being associated with the reference sounding reference signal transmission.15.The UE of claim 12, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:receive control signaling indicative of whether to include the first power headroom value or the second power headroom value in the power headroom report in accordance with the uplink shared channel transmit power being associated with a reference uplink shared channel transmission and the sounding reference signal transmit power being associated with a reference sounding reference signal transmission,wherein the criterion is associated with the control signaling indicating whether to include the first power headroom value or the second power headroom value in the power headroom report.16.The UE of claim 12, wherein:the uplink shared channel transmit power is associated with a reference uplink shared channel transmission and the sounding reference signal transmit power is associated with an actual sounding reference signal transmission; andthe criterion indicates that the UE includes the second power headroom value in the power headroom report in accordance with the sounding reference signal transmit power being associated with the actual sounding reference signal transmission.17.The UE of claim 12, wherein:the uplink shared channel transmit power is associated with an actual uplink shared channel transmission and the sounding reference signal transmit power is associated with a reference sounding reference signal transmission; andthe criterion indicates that the UE includes the first power headroom value in the power headroom report in accordance with the uplink shared channel transmit power being associated with the actual uplink shared channel transmission.18.The UE of claim 12, wherein:the uplink shared channel transmit power is associated with an actual uplink shared channel transmission and the sounding reference signal transmit power is associated with an actual sounding reference signal transmission; andthe criterion indicates that the UE includes the first power headroom value in the power headroom report in accordance with the uplink shared channel transmit power being associated with the actual uplink shared channel transmission.19.The UE of claim 12, wherein:the uplink shared channel transmit power is associated with an actual uplink shared channel transmission and the sounding reference signal transmit power is associated with an actual sounding reference signal transmission; andthe criterion indicates that the UE includes the second power headroom value in the power headroom report in accordance the sounding reference signal transmit power being associated with the actual sounding reference signal transmission.20.The UE of claim 12, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:receive control signaling indicative of whether to include the first power headroom value or the second power headroom value in the power headroom report in accordance with the uplink shared channel transmit power being associated with an actual uplink shared channel transmission and the sounding reference signal transmit power being associated with an actual sounding reference signal transmission,wherein the criterion is associated with the control signaling indicating whether to include the first power headroom value or the second power headroom value in the power headroom report.21.The UE of claim 12, wherein the criterion indicates that the UE includes both the first power headroom value and the second power headroom value in the power headroom report in accordance with the first power headroom value and the second power headroom value being available for transmission.22.The UE of claim 12, wherein the criterion indicates that the UE:includes both the first power headroom value and the second power headroom value in the power headroom report in accordance with the transmission configuration indicator state being associated with the pathloss offset; orexcludes the second power headroom value from the power headroom report in accordance with the transmission configuration indicator state not being associated with the pathloss offset.23.The UE of claim 12, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:transmit a message indicative of a capability of the UE associated with including one or both of the first power headroom value and the second power headroom value in the power headroom report, wherein transmission of the power headroom report is in accordance with the capability of the UE, and wherein the criterion is:a first criterion in accordance with the capability of the UE indicating that the UE is capable of including both of the first power headroom value and the second power headroom value in the power headroom report; ora second criterion in accordance with the capability of the UE indicating that the UE is incapable of including both of the first power headroom value and the second power headroom value in the power headroom report.24.A network entity, comprising:one or more memories storing processor-executable code; andone or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the network entity to:output first information indicative of an uplink shared channel resource allocation associated with a serving cell of a user equipment (UE) ;output second information indicative of a transmission configuration indicator state associated with the serving cell, wherein the transmission configuration indicator state is associated with a pathloss offset; andobtain a power headroom report based at least in part on a criterion, wherein the criterion is based at least in part on the serving cell being associated with the uplink shared channel resource allocation and the transmission configuration indicator state being associated with the pathloss offset, and wherein the power headroom report includes, based at least in part on the criterion, at least one of:a first power headroom value that corresponds to a transmit power limit of the UE minus an uplink shared channel transmit power associated with the serving cell; ora second power headroom value that corresponds to the transmit power limit of the UE minus a sounding reference signal transmit power associated with the serving cell.25.The network entity of claim 24, wherein the power headroom report includes an indication of whether the power headroom report includes the first power headroom value or the second power headroom value.26.The network entity of claim 25, wherein a first value of the indication indicates that the power headroom report includes the first power headroom value and a second value of the indication indicates that the power headroom report includes the second power headroom value.27.The network entity of claim 25, wherein a first value of the indication indicates that the power headroom report includes the first power headroom value and a second value of the indication indicates that the power headroom report includes the first power headroom value and the second power headroom value.28.The network entity of claim 25, wherein:the power headroom report includes a field associated with the serving cell of the UE, andthe field includes the indication.29.The network entity of claim 25, wherein:the power headroom report includes a field associated with a plurality of serving cells of the UE including the serving cell, andthe field includes the indication.30.The network entity of claim 25, wherein:the power headroom report includes a reserved bit, andthe reserved bit is interpreted as the indication in accordance with the serving cell being associated with the uplink shared channel resource allocation and the transmission configuration indicator state being associated with the pathloss offset.
Citation Information
Patent Citations
Power headroom report generation
CN112205038A
Controlling resource power headroom reporting
CN117136595A
Power headroom reporting in unified TCI framework
CN118104325A
Reference power headroom reporting and path loss measurement for unified transmission control indicator (TCI) framework
CN118511603A
Power headroom report
WO2015032023A1