Power headroom reporting in uplink transmission mode
By allowing UE to transmit conditional type 3 PHRs to downlink TRPs in asymmetric scenarios, the solution addresses inefficient resource allocation, improving SRS transmission efficiency.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- QUALCOMM INC
- Filing Date
- 2024-11-06
- Publication Date
- 2026-05-15
AI Technical Summary
In asymmetric downlink/uplink transmission reception point (TRP) scenarios where the number of uplink TRPs exceeds the number of downlink TRPs, user equipment (UE) is prohibited from transmitting type 3 power headroom reports (PHRs) to downlink TRPs, leading to inefficient radio resource allocation for sounding reference signal (SRS) transmission.
The UE is configured to transmit conditional type 3 PHRs to downlink TRPs in specific uplink transmission modes, allowing for improved radio resource allocation by enabling type 3 PHR triggering for SRS transmission.
This configuration enhances radio resource allocation by enabling the UE to transmit type 3 PHRs in asymmetric scenarios, providing more accurate power headroom information for downlink TRPs, thereby optimizing SRS transmission.
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Figure CN2024130092_15052026_PF_FP_ABST
Abstract
Description
POWER HEADROOM REPORTING IN UPLINK TRANSMISSION MODE
[0001] FIELD OF THE DISCLOSURE
[0002] Aspects of the present disclosure generally relate to wireless communication and specifically relate to techniques, apparatuses, and methods associated with power headroom reporting in an uplink transmission mode.BACKGROUND
[0003] Wireless communication systems are widely deployed to provide various services, which may involve carrying or supporting voice, text, other messaging, video, data, and / or other traffic. Typical wireless communication systems may employ multiple-access radio access technologies (RATs) capable of supporting communication among multiple wireless communication devices including user devices or other devices by sharing the available system resources (for example, time domain resources, frequency domain resources, spatial domain resources, and / or device transmit power, among other examples) . Such multiple-access RATs are supported by technological advancements that have been adopted in various telecommunication standards, which define common protocols that enable different wireless communication devices to communicate on a local, municipal, national, regional, or global level.
[0004] An example telecommunication standard is New Radio (NR) . NR, which may also be referred to as 5G, is part of a continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) . NR (and other RATs beyond NR) may be designed to better support enhanced mobile broadband (eMBB) access, Internet of things (IoT) networks or reduced capability device deployments, and ultra-reliable low latency communication (URLLC) applications. To support these verticals, NR systems may be designed to implement a modularized functional infrastructure, a disaggregated and service-based network architecture, network function virtualization, network slicing, multi-access edge computing, millimeter wave (mmWave) technologies including massive multiple-input multiple-output (MIMO) , licensed and unlicensed spectrum access, non-terrestrial network (NTN) deployments, sidelink and other device-to-device direct communication technologies (for example, cellular vehicle-to-everything (CV2X) communication) , multiple-subscriber implementations, high-precision positioning, and / or radio frequency (RF) sensing, among other examples.
[0005] A power headroom report (PHR) may indicate a difference between a configured maximum output power and a predicted transmission power of an uplink transmission. In asymmetric downlink / uplink transmission reception point (TRP) scenarios where a quantity of uplink TRPs is greater than a quantity of downlink TRPs, a user equipment (UE) may be permitted to transmit only type 1 PHRs (for uplink shared channels) to uplink TRPs and not type 3 PHRs (for sounding reference signal transmission) to a downlink TRP. This result may arise because type 3 PHRs cannot be transmitted when physical uplink shared channel (PUSCH) communication is configured in a serving cell. Without type 3 PHRs, a downlink TRP in asymmetric downlink / uplink TRP scenarios may be unable to allocate radio resources efficiently for sounding reference signal (SRS) transmission.SUMMARY
[0006] Some aspects described herein relate to an apparatus for wireless communication at a user equipment (UE) . The apparatus may include one or more memories storing processor-executable code and one or more processors coupled with the one or more memories. At least one processor of the one or more processors may be configured to cause the UE to receive an indication of an uplink transmission mode associated with at least one uplink network node and at least one downlink network node. At least one processor of the one or more processors may be configured to cause the UE to transmit, in accordance with the uplink transmission mode, one or more power headroom reports (PHRs) associated with one or more of the at least one uplink network node or the at least one downlink network node.
[0007] Some aspects described herein relate to a method of wireless communication performed at a UE. The method may include receiving an indication of an uplink transmission mode associated with at least one uplink network node and at least one downlink network node. The method may include transmitting, in accordance with the uplink transmission mode, one or more PHRs associated with one or more of the at least one uplink network node or the at least one downlink network node.
[0008] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving an indication of an uplink transmission mode associated with at least one uplink network node and at least one downlink network node. The apparatus may include means for transmitting, in accordance with the uplink transmission mode, one or more PHRs associated with one or more of the at least one uplink network node or the at least one downlink network node.
[0009] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication. The set of instructions may include one or more instructions that, when executed at a UE, cause the UE to receive an indication of an uplink transmission mode associated with at least one uplink network node and at least one downlink network node. The set of instructions may include one or more instructions that, when executed at a UE, cause the UE to transmit, in accordance with the uplink transmission mode, one or more PHRs associated with one or more of the at least one uplink network node or the at least one downlink network node.
[0010] Aspects of the present disclosure may generally be implemented by or as a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, network node, network entity, wireless communication device, and / or processing system as substantially described with reference to, and as illustrated by, this specification and accompanying drawings.
[0011] The foregoing paragraphs of this section have broadly summarized some aspects of the present disclosure. These and additional aspects and associated advantages will be described hereinafter. The disclosed aspects may be used as a basis for modifying or designing other aspects for carrying out the same or similar purposes of the present disclosure. Such equivalent aspects do not depart from the scope of the appended claims. Characteristics of the aspects disclosed herein, both their organization and method of operation, together with associated advantages, will be better understood from the following description when considered in connection with the accompanying drawings.BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The appended drawings illustrate some aspects of the present disclosure but are not limiting of the scope of the present disclosure because the description may enable other aspects. Each of the drawings is provided for purposes of illustration and description, and not as a definition of the limits of the claims. The same or similar reference numbers in different drawings may identify the same or similar elements.
[0013] Figure 1 is a diagram illustrating an example of a wireless communication network, in accordance with the present disclosure.
[0014] Figure 2 is a diagram illustrating an example of an asymmetric downlink / uplink transmission reception point (TRP) scenario, in accordance with the present disclosure.
[0015] Figure 3 is a diagram illustrating an example of a power headroom report (PHR) medium access control (MAC) control element (MAC-CE) , in accordance with the present disclosure.
[0016] Figure 4 is a diagram illustrating an example of a multi-TRP scenario, in accordance with the present disclosure.
[0017] Figure 5 is a diagram illustrating an example associated with PHR signaling in an uplink transmission mode, in accordance with the present disclosure.
[0018] Figure 6 is a diagram illustrating examples associated with respective uplink transmission modes, in accordance with the present disclosure.
[0019] Figure 7 is a diagram illustrating an example associated with a PHR MAC-CE for a three-PHR mode, in accordance with the present disclosure.
[0020] Figure 8 is a flowchart illustrating an example process performed, for example, at a user equipment (UE) or an apparatus of a UE that supports power headroom reporting in an uplink transmission mode, in accordance with the present disclosure.
[0021] Figure 9 is a diagram of an example apparatus for wireless communication that supports power headroom reporting in an uplink transmission mode, in accordance with the present disclosure.DETAILED DESCRIPTION
[0022] Various aspects of the present disclosure are described hereinafter with reference to the accompanying drawings. However, aspects of the present disclosure may be embodied in many different forms. The present disclosure is not to be construed as limited to any specific aspect illustrated by or described with reference to an accompanying drawing or otherwise presented in this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. One skilled in the art may appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using various combinations or quantities of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover an apparatus having, or a method that is practiced using, other structures and / or functionalities in addition to or other than the structures and / or functionalities with which various aspects of the disclosure set forth herein may be practiced. Any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.
[0023] Several aspects of telecommunication systems will now be presented with reference to various methods, operations, apparatuses, and techniques. These methods, operations, apparatuses, and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, or algorithms (collectively referred to as “elements” ) . These elements may be implemented using hardware, software, or a combination of hardware and software. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
[0024] A network node can use uplink transmission power information to manage radio resources. For example, the network node may allocate radio resources using uplink transmission power information associated with physical uplink shared channel (PUSCH) transmissions, physical uplink control channel (PUCCH) transmissions, or sounding reference signals (SRSs) for downlink channel state information (CSI) acquisition. Accordingly, a user equipment (UE) may use a power headroom report (PHR) to indicate the uplink transmission power information to a network node. For example, a PHR may indicate a difference between a configured maximum output power and a predicted transmission power of an uplink transmission, such as a PUSCH transmission, a PUCCH transmission, or an SRS. A type 1 PHR may indicate a difference between a nominal UE maximum transmit power and an estimated power for an uplink shared channel (UL-SCH) transmission per activated serving cell. A type 3 power headroom report may indicate a difference between a nominal UE maximum transmit power and an estimated power for an SRS transmission per activated serving cell. The network node may use the PHR to efficiently allocate radio resources with respect to UE transmission power.
[0025] In some examples, the UE may operate within an asymmetric downlink / uplink transmission reception point (TRP) scenario. An asymmetric downlink / uplink TRP scenario may involve a multi-TRP (mTRP) implementation in which a quantity of TRPs that receive uplink communications from the UE ( “uplink TRPs” ) is different than a quantity of TRPs that transmit downlink communications to the UE ( “downlink TRPs” ) . For example, the quantity of uplink TRPs may be greater than the quantity of downlink TRPs, which may help to reduce uplink pathloss.
[0026] In some examples, when PUSCH communication is configured in a serving cell, type 3 PHR is absent, and the UE transmits only type 1 PHRs (and not type 3 PHRs) to the serving cell. As a result, in asymmetric downlink / uplink TRP scenarios, the UE is prohibited from transmitting type 3 PHRs to a downlink TRP. However, this prohibition may prevent the downlink TRP from optimal radio resource allocation with respect to UE SRS transmission power.
[0027] Various aspects relate generally to PHR enhancements for mTRP modes in asymmetric downlink / uplink TRP scenarios. Some aspects more specifically relate to conditional transmission of candidate type 3 PHRs to a downlink TRP in asymmetric downlink / uplink TRP scenarios. In some aspects, the UE may operate in a first uplink transmission mode whereby the UE transmits uplink communications to one uplink TRP and one downlink TRP. In some aspects, the UE may operate in a second uplink transmission mode whereby the UE transmits uplink communications to two uplink TRPs. In some aspects, the UE may, in the first or second uplink transmission mode, transmit one or more PHRs. For example, the one or more PHRs may be type 1 PHRs and / or type 3 PHRs.
[0028] In some aspects, the UE may be configured to transmit a single PHR. For example, the UE may, using one or more PHR selection rules, select one of a first candidate type 1 PHR to transmit to a first uplink TRP, a second candidate type 1 PHR to transmit to a second uplink TRP, or a candidate type 3 PHR to transmit to a downlink TRP.
[0029] In some aspects, the UE may be configured to transmit up to two PHRs. For example, the UE may, using one or more PHR selection rules, select up to two of a first candidate type 1 PHR to transmit to a first uplink TRP, a second candidate type 1 PHR to transmit to a second uplink TRP, or a candidate type 3 PHR to transmit to a downlink TRP.
[0030] In some aspects, the UE may be configured to transmit up to three PHRs. For example, the UE may transmit a first candidate type 1 PHR to a first uplink TRP, a second candidate type 1 PHR to a second uplink TRP, and a candidate type 3 PHR to a downlink TRP.
[0031] Particular aspects of the subject matter described in this disclosure can be implemented to realize one or more of the following potential advantages. In some examples, the described techniques can be used to improve radio resource allocation by enabling the UE in an asymmetric downlink / uplink TRP scenario to transmit (and / or consider for transmission) type 3 PHRs. For example, the UE may perform type 3 PHR triggering for SRSs transmitted to downlink TRPs for downlink CSI acquisition.
[0032] Being configured to transmit the single PHR may enable the UE to transmit (and / or consider for transmission) type 3 PHRs in asymmetric downlink / uplink TRP scenarios in examples where the UE is not capable of transmitting multiple PHRs.
[0033] Being configured to transmit up to two PHRs may help to further improve radio resource allocation. For example, the UE may transmit two PHRs in examples where the UE is not capable of transmitting more than two PHRs, which may provide more radio resource allocation information than a single PHR.
[0034] Being configured to transmit up to three PHRs may help to further improve radio resource allocation. For example, the UE may transmit three PHRs, which may provide more radio resource allocation information than one or two PHRs.
[0035] As described above, wireless communication systems may be deployed to provide various services, which may involve carrying or supporting voice, text, other messaging, video, data, and / or other traffic. Some wireless communications systems may employ multiple-access radio access technologies (RATs) . The multiple-access RATs may be capable of supporting communication with multiple wireless communication devices by sharing the available system resources (for example, time domain resources, frequency domain resources, spatial domain resources, and / or device transmit power, among other examples) . Examples of such multiple-access RATs include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.
[0036] Multiple-access RATs are supported by technological advancements that have been adopted in various telecommunication standards, which define common protocols that enable wireless communication devices to communicate on a local, municipal, enterprise, national, regional, or global level. For example, 5G New Radio (NR) is part of a continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) . 5G NR may support enhanced mobile broadband (eMBB) access, Internet of Things (IoT) networks or reduced capability (RedCap) device deployments, ultra-reliable low-latency communication (URLLC) applications, and / or massive machine-type communication (mMTC) , among other examples.
[0037] To support these and other target verticals, a wireless communication system may be designed to implement a modularized functional infrastructure, a disaggregated and service-based network architecture, network function virtualization, network slicing, multi-access edge computing, millimeter wave (mmWave) technologies including massive multiple-input multiple-output (MIMO) , beamforming, IoT device or RedCap device connectivity and management, industrial connectivity, licensed and unlicensed spectrum access, sidelink and other device-to-device direct communication (for example, cellular vehicle-to-everything (CV2X) communication) , frequency spectrum expansion, overlapping spectrum use, small cell deployments, non-terrestrial network (NTN) deployments, device aggregation, advanced duplex communication (for example, sub-band full-duplex (SBFD) ) , multiple-subscriber implementations, high-precision positioning, radio frequency (RF) sensing, network energy savings (NES) , low-power signaling and radios, and / or artificial intelligence or machine learning (AI / ML) , among other examples.
[0038] The foregoing and other technological improvements may support use cases, such as wireless fronthauls, wireless midhauls, wireless backhauls, wireless data centers, extended reality (XR) and metaverse applications, meta services for supporting vehicle connectivity, holographic and mixed reality communication, autonomous and collaborative robots, vehicle platooning and cooperative maneuvering, sensing networks, gesture monitoring, human-brain interfacing, digital twin applications, asset management, and universal coverage applications using non-terrestrial and / or aerial platforms, among other examples.
[0039] As the demand for connectivity continues to increase, further improvements in NR may be implemented, and other RATs, such as 6G and beyond, may be introduced to enable new applications and facilitate new use cases. The methods, operations, apparatuses, and techniques described herein may enable one or more of the foregoing technologies or new technologies and / or support one or more of the foregoing use cases or new use cases.
[0040] Figure 1 is a diagram illustrating an example of a wireless communication network 100 in accordance with the present disclosure. The wireless communication network 100 may be or may include elements of a 5G (or NR) network or a 6G network, among other examples. The wireless communication network 100 may include multiple network nodes 110. For example, in Figure 1, the wireless communication network 100 includes a network node (NN) 110a and a network node 110b. The network nodes 110 may support communications with multiple UEs 120. For example, in Figure 1, the network nodes 110 support communication with a UE 120a, a UE 120b, and a UE 120c. In some examples, a UE 120 may also communicate with other UEs 120 and a network node 110 may communicate with a core network and with other network nodes 110.
[0041] The network nodes 110 and the UEs 120 of the wireless communication network 100 may communicate using the electromagnetic spectrum, which may be subdivided by frequency or wavelength into various classes, bands, carriers, and / or channels. For example, devices of the wireless communication network 100 may communicate using one or more operating bands. In some aspects, multiple wireless communication networks 100 may be deployed in a given geographic area. Each wireless communication network 100 may support a particular RAT (which may also be referred to as an air interface) and may operate on one or more carrier frequencies in one or more frequency bands or ranges. In some examples, when multiple RATs are deployed in a given geographic area, each RAT in the geographic area may operate on different frequencies to avoid interference with other RATs. Additionally or alternatively, in some examples, the wireless communication network 100 may implement dynamic spectrum sharing (DSS) , in which multiple RATs are implemented with dynamic bandwidth allocation (for example, based on user demand) in a single frequency band. In some examples, the wireless communication network 100 may support communication over unlicensed spectrum, where access to an unlicensed channel is subject to a channel access mechanism. For example, in a shared or unlicensed frequency band, a transmitting device may perform a channel access procedure, such as a listen-before-talk (LBT) procedure, to contend against other devices for channel access before transmitting on a shared or unlicensed channel.
[0042] Various operating bands have been defined as frequency range designations FR1 (410 MHz through 7.125 GHz) , FR2 (24.25 GHz through 52.6 GHz) , FR3 (7.125 GHz through 24.25 GHz) , FR4a or FR4-1 (52.6 GHz through 71 GHz) , FR4 (52.6 GHz through 114.25 GHz) , and FR5 (114.25 GHz through 300 GHz) . Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “sub-6 GHz” band in some documents and articles. Similarly, FR2 is often referred to (interchangeably) as a “millimeter wave” band in some documents and articles, despite being different than the extremely high frequency (EHF) band (30 GHz through 300 GHz) , which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band. The frequencies between FR1 and FR2 are often referred to as mid-band frequencies, which include FR3. Frequency bands falling within FR3 may inherit FR1 characteristics or FR2 characteristics, and thus may effectively extend features of FR1 or FR2 into the mid-band frequencies. Thus, “sub-6 GHz, ” if used herein, may broadly refer to frequencies that are less than 6 GHz, that are within FR1, and / or that are included in mid-band frequencies. Similarly, the term “millimeter wave, ” if used herein, may broadly refer to mid-band frequencies or to frequencies that are within FR2, FR4, FR4-a or FR4-1, FR5, and / or the EHF band. Higher frequency bands may extend 5G NR operation, 6G operation, and / or other RATs beyond 52.6 GHz.
[0043] A network node 110 and / or a UE 120 may include one or more devices, components, or systems that enable communication with other devices, components, or systems of the wireless communication network 100. For example, a UE 120 and a network node 110 may each include one or more chips, system-on-chips (SoCs) , chipsets, packages, or devices that individually or collectively constitute or comprise a processing system, such as a processing system 140 of the UE 120. A processing system (for example, the processing system 140) includes processor (or “processing” ) circuitry in the form of one or multiple processors, microprocessors, processing units (such as central processing units (CPUs) , graphics processing units (GPUs) , neural processing units (NPUs) (also referred to as neural network processors or deep learning processors (DLPs) ) , and / or digital signal processors (DSPs) ) , processing blocks, application-specific integrated circuits (ASICs) , programmable logic devices (PLDs) , or other discrete gate or transistor logic or circuitry (any one or more of which may be generally referred to herein individually as a “processor” or collectively as “the processor” or “the processor circuitry” ) . Such processors may be individually or collectively configurable or configured to perform various functions or operations described herein. A group of processors collectively configurable or configured to perform a set of functions may include a first processor configurable or configured to perform a first function of the set and a second processor configurable or configured to perform a second function of the set. In some other examples, each of a group of processors may be configurable or configured to perform a same set of functions.
[0044] The processing system 140 may each include memory circuitry in the form of one or multiple memory devices, memory blocks, memory elements, or other discrete gate or transistor logic or circuitry, each of which may include or implement tangible storage media such as random-access memory (RAM) or read-only memory (ROM) , or combinations thereof (any one or more of which may be generally referred to herein individually as a “memory” or collectively as “the memory” or “the memory circuitry” ) . One or more of the memories may be coupled (for example, operatively coupled, communicatively coupled, electronically coupled, or electrically coupled) with one or more of the processors and may individually or collectively store processor-executable code or instructions (such as software) that, when executed by one or more of the processors, may configure one or more of the processors to perform various functions or operations described herein. Additionally or alternatively, in some examples, one or more of the processors may be configured to perform various functions or operations described herein without requiring configuration by software. “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
[0045] The processing system 140 may each include or be coupled with one or more modems (such as a cellular (for example, a 5G or 6G compliant) modem) . In some examples, one or more processors of the processing system 140 include or implement one or more of the modems. The processing system 140 may also include or be coupled with multiple radios (collectively “the radio” ) , multiple RF chains, or multiple transceivers, each of which may in turn be coupled with one or more of multiple antennas. In some examples, one or more processors of the processing system 140 include or implement one or more of the radios, RF chains, or transceivers. An RF chain may include one or more filters, mixers, oscillators, amplifiers, analog-to-digital converters (ADCs) , and / or other devices that convert between an analog signal (such as for transmission or reception via an air interface) and a digital signal (such as for processing by the processing system 140 of the UE 120) .
[0046] A network node 110 and a UE 120 may each include one or multiple antennas or antenna arrays. Typical network nodes 110 and UEs 120 may include multiple antennas, which may be organized or structured into one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, among other examples. As used herein, the term “antenna” can refer to one or more antennas, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays. The term “antenna panel” can refer to a group of antennas (such as antenna elements) arranged in an array or panel, which may facilitate beamforming by manipulating parameters associated with the group of antennas. The term “antenna module” may refer to circuitry including one or more antennas as well as one or more other components (such as filters, amplifiers, or processors) associated with integrating the antenna module into a wireless communication device such as the network node 110 and the UE 120.
[0047] A network node 110 may be, may include, or may also be referred to as an NR network node, a 5G network node, a 6G network node, a Node B, a gNB, an access point (AP) , a TRP, a network entity, a network element, a network equipment, and / or another type of device, component, or system included in a radio access network (RAN) . In various deployments, a network node 110 may be implemented as a single physical node (for example, a single physical structure) or may be implemented as two or more physical nodes (for example, two or more distinct physical structures) . For example, a network node 110 may be a device or system that implements a part of a radio protocol stack, a device or system that implements a full radio protocol stack (such as a full gNB protocol stack) , or a collection of devices or systems that collectively implement the full radio protocol stack. For example, and as shown, a network node 110 may be an aggregated network node having an aggregated architecture, meaning that the network node 110 may implement a full radio protocol stack that is physically and logically integrated within a single physical structure in the wireless communication network 100. For example, an aggregated network node 110 may consist of a single standalone base station or a single TRP that operates with a full radio protocol stack to enable or facilitate communication between a UE 120 and a core network of the wireless communication network 100.
[0048] Alternatively, and as also shown, a network node 110 may be a disaggregated network node (sometimes referred to as a disaggregated base station) , having a disaggregated architecture, meaning that the network node 110 may operate with a radio protocol stack that is physically distributed and / or logically distributed among two or more nodes in the same geographic location or in different geographic locations. In some deployments, disaggregated network nodes 110 may be used in an integrated access and backhaul (IAB) network, in an open radio access network (O-RAN) (such as a network configuration in compliance with the O-RAN Alliance) , or in a virtualized radio access network (vRAN) , also known as a cloud radio access network (C-RAN) , to facilitate scaling by separating network functionality into multiple units or modules that can be individually deployed.
[0049] The network nodes 110 of the wireless communication network 100 may include one or more central units (CUs) , one or more distributed units (DUs) , and one or more radio units (RUs) . A CU may host one or more higher layers, such as a radio resource control (RRC) layer, a packet data convergence protocol (PDCP) layer, and a service data adaptation protocol (SDAP) layer, among other examples. A DU may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and / or one or more higher physical (PHY) layers depending, at least in part, on a functional split, such as a functional split defined by the 3GPP. In some examples, a DU also may host a lower PHY layer that is configured to perform functions, such as a fast Fourier transform (FFT) , an inverse FFT (IFFT) , beamforming, and / or physical random access channel (PRACH) extraction and filtering, among other examples. An RU may perform RF processing functions or lower PHY layer functions, such as an FFT, an IFFT, beamforming, or PRACH extraction and filtering, among other examples, according to a functional split, such as a lower layer split (LLS) . In such an architecture, each RU can be operated to handle over the air (OTA) communication with one or more UEs 120. In some examples, a single network node 110 may include a combination of one or more CUs, one or more DUs, and / or one or more RUs. In some examples, a CU, a DU, and / or an RU may be implemented as a virtual unit, such as a virtual central unit (VCU) , a virtual distributed unit (VDU) , or a virtual radio unit (VRU) , among other examples, which may be implemented as a virtual network function, such as in a cloud deployment.
[0050] Some network nodes 110 (for example, a base station, an RU, or a TRP) may provide communication coverage for a particular geographic area. The term “cell” can refer to a coverage area of a network node 110 or to a network node 110 itself, depending on the context in which the term is used. A network node 110 may support one or more cells (for example, each cell may support communication within an angular (for example, 60 degree) range around the network node) . In some examples, a network node 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, or another type of cell. A macro cell may cover a relatively large geographic area (for example, several kilometers in radius) and may allow unrestricted access by UEs 120 with associated service subscriptions. A pico cell may cover a relatively small geographic area and may also allow unrestricted access by UEs 120 with associated service subscriptions. A femto cell may cover a relatively small geographic area (for example, a home) and may allow restricted access by UEs 120 having association with the femto cell (for example, UEs 120 in a closed subscriber group (CSG) ) . In some examples, a cell may not necessarily be stationary. For example, the geographic area of the cell may move according to the location of an associated mobile network node 110 (for example, a train, a satellite, an unmanned aerial vehicle, or an NTN network node) .
[0051] The wireless communication network 100 may be a heterogeneous network that includes network nodes 110 of different types, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, aggregated network nodes, and / or disaggregated network nodes, among other examples. Various different types of network nodes 110 may generally transmit at different power levels, serve different coverage areas (for example, a cell 130a and a cell 130b) , and / or have different impacts on interference in the wireless communication network 100 than other types of network nodes 110.
[0052] The UEs 120 may be physically dispersed throughout the coverage area of the wireless communication network 100, and each UE 120 may be stationary or mobile. A UE 120 may be, may include, or may also be referred to as an access terminal, a mobile station, or a subscriber unit. A UE 120 may be, include, or be coupled with a cellular phone (for example, a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (for example, a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry, a gaming device, an entertainment device (for example, a music device, a video device, or a satellite radio) , an XR device, a vehicular component or sensor, a smart meter or sensor, industrial manufacturing equipment, a Global Navigation Satellite System (GNSS) device (such as a Global Positioning System device or another type of positioning device) , a UE function of a network node, and / or any other suitable device or function that may communicate via a wireless medium.
[0053] Some UEs 120 may be classified according to different categories in association with different complexities and / or different capabilities. UEs 120 in a first category may facilitate massive IoT in the wireless communication network 100, and may offer low complexity and / or cost relative to UEs 120 in a second category. UEs 120 in a second category may include mission-critical IoT devices, legacy UEs, baseline UEs, high-tier UEs, advanced UEs, full-capability UEs, and / or premium UEs that are capable of URLLC, eMBB, and / or precise positioning in the wireless communication network 100, among other examples. A third category of UEs 120 may have mid-tier complexity and / or capability (for example, a capability between that of the UEs 120 of the first category and that of the UEs 120 of the second capability) . A UE 120 of the third category may be referred to as a reduced capability UE ( “RedCap UE” ) , a mid-tier UE, an NR-Light UE, and / or an NR-Lite UE, among other examples. RedCap UEs may bridge a gap between the capability and complexity of NB-IoT devices and / or eMTC UEs, and mission-critical IoT devices and / or premium UEs. RedCap UEs may include, for example, wearable devices, IoT devices, industrial sensors, or cameras that are associated with a limited bandwidth, power capacity, and / or transmission range, among other examples. RedCap UEs may support healthcare environments, building automation, electrical distribution, process automation, transport and logistics, or smart city deployments, among other examples.
[0054] In some examples, a network node 110 may be, may include, or may operate as an RU, a TRP, or a base station that communicates with one or more UEs 120 via a radio access link (which may be referred to as a “Uu” link) . The radio access link may include a downlink and an uplink. “Downlink” (or “DL” ) refers to a communication direction from a network node 110 to a UE 120, and “uplink” (or “UL” ) refers to a communication direction from a UE 120 to a network node 110. Downlink and uplink resources may include time domain resources (for example, frames, subframes, slots, and symbols) , frequency domain resources (for example, frequency bands, component carriers (CCs) , subcarriers, resource blocks, and resource elements) , and spatial domain resources (for example, particular transmit directions or beams) .
[0055] Frequency domain resources may be subdivided into bandwidth parts (BWPs) . A BWP may be a block of frequency domain resources (for example, a continuous set of resource blocks (RBs) within a full component carrier bandwidth) that may be configured at a UE-specific level. A UE 120 may be configured with both an uplink BWP and a downlink BWP (which may be the same or different) . Each BWP may be associated with its own numerology (indicating a sub-carrier spacing (SCS) and cyclic prefix (CP) ) . A BWP may be dynamically configured or activated (for example, by a network node 110 transmitting a downlink control information (DCI) configuration to the one or more UEs 120) and / or reconfigured (for example, in real-time or near-real- time) according to changing network conditions in the wireless communication network 100 and / or specific requirements of one or more UEs 120. An active BWP defines the operating bandwidth of the UE 120 within the operating bandwidth of the serving cell. The use of BWPs enables more efficient use of the available frequency domain resources in the wireless communication network 100 because fewer frequency domain resources may be allocated to a BWP for a UE 120 (which may reduce the quantity of frequency domain resources that a UE 120 is required to monitor and reduce UE power consumption by enabling the UE to monitor fewer frequency domain resources) , leaving more frequency domain resources to be spread across multiple UEs 120. Thus, BWPs may also assist in the implementation of lower-capability (for example, RedCap) UEs 120 by facilitating the configuration of smaller bandwidths for communication by such UEs 120 and / or by facilitating reduced UE power consumption.
[0056] As used herein, a downlink signal may be or include a reference signal, control information, or data. For example, downlink reference signals include a primary synchronization signal (PSS) , a secondary SS (SSS) , an SS block (SSB) (for example, that includes a PSS, an SSS, and a physical broadcast channel (PBCH) ) , a demodulation reference signal (DMRS) , a phase tracking reference signal (PTRS) , a tracking reference signal (TRS) , and a CSI reference signal (CSI-RS) , among other examples. A downlink signal carrying control information or data may be transmitted via a downlink channel. Downlink channels may include one or more control channels for transmitting control information and one or more data channels for transmitting data. Downlink reference signals may be transmitted in addition to, or multiplexed with, downlink control channel communications and / or downlink data channel communications. A downlink control channel may be specifically used to transmit DCI from a network node 110 to a UE 120. DCI generally contains the information the UE 120 needs to identify RBs in a subsequent subframe and how to decode them, including a modulation and coding scheme (MCS) or redundancy version parameters. Different DCI formats carry different information, such as scheduling information in the form of downlink or uplink grants, slot formal indicators (SFIs) , preemption indicators (PIs) , transmit power control (TPC) commands, hybrid automatic repeat request (HARQ) information, new data indicators (NDIs) , among other examples. A downlink data channel may be used to transmit downlink data (for example, user data associated with a UE 120) from a network node 110 to a UE 120. Downlink control channels may include physical downlink control channels (PDCCHs) , and downlink data channels may include physical downlink shared channels (PDSCHs) . Control information or data communications may be transmitted on a PDCCH and PDSCH, respectively. For example, a PDCCH can carry DCI, while a PDSCH can carry a MAC control element (MAC-CE) , an RRC message, or user data, among other examples. Each PDSCH may carry one or more transport blocks (TBs) of data.
[0057] As used herein, an uplink signal may include a reference signal, control information, or data. For example, uplink reference signals include a SRS, a PTRS, and a DMRS, among other examples. An uplink signal carrying control information or data may be transmitted via an uplink channel. An uplink channel may include one or more control channels for transmitting control information and one or more data channels for transmitting data. Uplink reference signals may be transmitted in addition to, or multiplexed with, uplink control channel communications and / or uplink data channel communications. An uplink control channel may be specifically used to transmit uplink control information (UCI) from a UE 120 to a network node 110. An uplink data channel may be used to transmit uplink data (for example, user data associated with a UE 120) from a UE 120 to a network node 110. Uplink control channels may include PUCCHs, and uplink data channels may include PUSCHs. Control information or data communications may be transmitted on a PUCCH and PUSCH, respectively. For example, a PUCCH can carry UCI, while a PUSCH can carry a MAC-CE, an RRC message, or user data, among other examples. UCI can include a scheduling request (SR) , HARQ feedback information (for example, a HARQ acknowledgement (ACK) indication or a HARQ negative acknowledgement (NACK) indication) , uplink power control information (for example, an uplink TPC parameter) , and / or CSI, among other examples. CSI can include a channel quality indicator (CQI) (indicative of downlink channel conditions to facilitate selection of transmission parameters, such as an MCS, by a network node 110) , a precoding matrix indicator (PMI) , a CSI-RS resource indicator (CRI) (for example, indicative of a beam used to transmit a CSI-RS) , an SS / PBCH resource block indicator (SSBRI) (for example, indicative of a beam used to transmit an SSB) , a layer indicator (LI) , a rank indicator (RI) , and / or measurement information (for example, a layer 1 (L1) -reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, among other examples) which can be used for beam management, among other examples. Each PUSCH may carry one or more TBs of data.
[0058] The information (for example, data, control information, or reference signal information) transmitted by a network node 110 to a UE 120, or vice versa, may be represented as a sequence of binary bits that are mapped (for example, modulated) to an analog signal waveform (for example, a discrete Fourier transform (DFT) -spread-orthogonal frequency division multiplexing (OFDM) (DFT-s-OFDM) waveform or a CP-OFDM waveform) that is transmitted by the network node 110 or UE 120 over a wireless communication channel. In some examples, the network node 110 or the UE 120 (for example, using the processing system 140, respectively) may select an MCS (for example, an order of quadrature amplitude modulation (QAM) , such as 64-QAM, 128-QAM, or 256-QAM, among other examples) for a downlink signal or an uplink signal. For example, the network node 110 may select an MCS for a downlink signal in accordance with UCI received from the UE 120. The network node 110 may transmit, to the UE 120, an indication of the selected MCS for the downlink signal, such as via DCI that schedules the downlink signal. As another example, the network node 110 may transmit, and the UE 120 may receive, an indication of an MCS to be applied for the one or more uplink signals, such as via DCI scheduling transmission of the one or more uplink signals.
[0059] The network node 110 or the UE 120 (such as by using the processing system 140 and / or one or more coupled modems) may perform signal processing on the information (such as filtering, amplification, modulation, digital-to-analog conversion, an IFFT operation, multiplexing, interleaving, mapping, and / or encoding, among other examples) to generate a processed signal in accordance with the selected MCS. In some examples, the network node 110 or the UE 120 (for example, using the processing system 140, respectively, and / or one or more coupled encoders or modems) may perform a channel coding operation or a forward error correction (FEC) operation to control errors in transmitted information. For example, the network node 110 or the UE 120 may perform an encoding operation to generate encoded information (such as by selectively introducing redundancy into the information, typically using an error correction code (ECC) , such as a polar code or a low-density parity-check (LDPC) code) . The network node 110 or the UE 120 (for example, using the processing system 140 and / or one or more modems) may further perform spatial processing (for example, precoding) on the encoded information to generate one or more processed or precoded signals for downlink or uplink transmission, respectively. In some examples, the network node 110 or the UE 120 may perform codebook-based precoding or non- codebook-based precoding. Codebook-based precoding may involve selecting a precoder (for example, a precoding matrix) using a codebook. For example, the network node 110 may provide precoding information indicating which precoder, defined by the codebook, is to be used by the UE 120. Non-codebook-based precoding may involve selecting or deriving a precoder based on, or otherwise associated with, one or more downlink or uplink signal measurements. The network node 110 or the UE 120 may transmit the processed downlink or uplink signals, respectively, via one or more antennas.
[0060] The network node 110 or the UE 120 may receive uplink signals or downlink signals, respectively, via one or more antennas. The network node 110 or the UE 120 (for example, using the processing system 140, respectively, and / or one or more coupled modems) may perform signal processing (for example, in accordance with the MCS) on the received uplink or downlink signals, respectively (such as filtering, amplification, demodulation, analog-to-digital conversion, an FFT operation, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, and / or decoding, among other examples) , to map the received signal (s) to a sequence of binary bits (for example, received information) that estimates the information transmitted by the network node 110 or the UE 120 via the downlink or uplink signals. The network node 110 or the UE 120 (for example, using the processing system 140, respectively, and / or a coupled decoder or one or more modems) may decode the received information (such as by using an ECC, a decoding operation, and / or an FEC operation) to detect errors and / or correct bit errors in the received information to generate decoded information. The decoded information may estimate the information transmitted via the downlink or uplink signals.
[0061] In some examples, a UE 120 and a network node 110 may perform MIMO communication. “MIMO” generally refers to transmitting or receiving multiple signals (such as multiple layers or multiple data streams) simultaneously over the same time and frequency resources. MIMO techniques generally exploit multipath propagation. A network node 110 and / or UE 120 may communicate using massive MIMO, multi-user MIMO, or single-user MIMO, which may involve rapid switching between beams or cells. For example, the amplitudes and / or phases of signals transmitted via antenna elements and / or sub-elements may be modulated and shifted relative to each other (such as by manipulating a phase shift, a phase offset, and / or an amplitude) to generate one or more beams, which is referred to as beamforming. For example, the network node 110b may generate one or more beams 160a, and the UE 120b may generate one or more beams 160b. The term “beam” may refer to a directional transmission of a wireless signal toward a receiving device or otherwise in a desired direction, a directional reception of a wireless signal from a transmitting device or otherwise in a desired direction, a direction associated with a directional transmission or directional reception, a set of directional resources associated with a signal transmission or signal reception (for example, an angle of arrival, a horizontal direction, and / or a vertical direction) , a set of parameters that indicate one or more aspects of a directional signal, a direction associated with the signal, and / or a set of directional resources associated with the signal, among other examples.
[0062] MIMO may be implemented using various spatial processing or spatial multiplexing operations. In some examples, MIMO may include a massive MIMO technique which may be associated with an increased (for example, “massive” ) quantity of antennas at the network node 110 and / or at the UE 120, such as in a network implementing mmWave technology. Massive MIMO may improve communication reliability by enabling a network node 110 and / or a UE 120 to communicate the same data across different propagation (or spatial) paths. In some examples, MIMO may support simultaneous transmission to multiple receivers, referred to as multi-user MIMO (MU-MIMO) . Some RATs may employ MIMO techniques, such as mTRP operation (including redundant transmission or reception on multiple TRPs) , reciprocity in the time domain or the frequency domain, single-frequency-network (SFN) transmission, or non-coherent joint transmission (NC-JT) .
[0063] To support MIMO techniques, the network node 110 and the UE 120 may perform one or more beam management operations, such as an initial beam acquisition operation, one or more beam refinement operations, and / or a beam recovery operation. For example, an initial beam acquisition operation may involve the network node 110 transmitting signals (for example, SSBs, CSI-RSs, or other signals) via respective beams (for example, of the beams 160a of the network node 110) and the UE 120 receiving and measuring the signal (s) via respective beams of multiple beams (for example, from the beams 160b of the UE 120) to identify a best beam (or beam pair) for communication between the UE 120 and the network node 110. For example, the UE 120 may transmit an indication (for example, in a message associated with a random access channel (RACH) operation) of a (best) identified beam of the network node 110 (for example, by indicating an SSBRI or other identifier associated with the beam) . A beam refinement operation may involve a first device (for example, the UE 120 or the network node 110) transmitting signal (s) via a subset of beams (for example, identified based on, or otherwise associated with, measurements reported as part of one or more other beam management operations) . A second device (for example, the network node 110 or the UE 120) may receive the signal (s) via a single beam (for example, to identify the best beam for communication from the subset of beams) . The beam (s) may be identified via one or more spatial parameters, such as a transmission configuration indicator (TCI) state and / or a quasi co-location (QCL) parameter, among other examples. The network node 110 and the UE 120 may increase reliability and / or achieve efficiencies in throughput, signal strength, and / or other signal properties for massive MIMO operations by performing the beam management operations.
[0064] Some aspects and techniques as described herein may be implemented, at least in part, using an artificial intelligence (AI) program (for example, referred to herein as an “AI / ML model” ) , such as a program that includes a machine learning (ML) model and / or an artificial neural network (ANN) model. The AI / ML model may be deployed at one or more devices 165 (for example, a network node 110 and / or UEs 120) . For example, the one or more devices 165 may include a UE 120 (for example, the processing system 140) , a network node 110, one or more servers, and / or one or more components of a cloud computing network, among other examples. In some examples, the AI / ML model (or an instance of the AI / ML model) may be deployed at multiple devices (for example, a first portion of the AI / ML model may be deployed at a UE 120 and a second portion of the AI / ML model may be deployed at a network node 110) . In other examples, a first AI / ML model may be deployed at a UE 120 and a second AI / ML model may be deployed at a network node 110. The AI / ML model (s) may be configured to enhance various aspects of the wireless communication network 100. For example, the AI / ML model (s) may be trained to identify patterns or relationships in data corresponding to the wireless communication network 100, a device, and / or an air interface, among other examples. The AI / ML model (s) may support operational decisions relating to one or more aspects associated with wireless communications devices, networks, or services.
[0065] In some aspects, the UE 120 may include a communication manager 150. As described in more detail elsewhere herein, the communication manager 150 may receive an indication of an uplink transmission mode associated with at least one uplink network node and at least one downlink network node; and transmit, in accordance with the uplink transmission mode, one or more PHRs associated with one or more of the at least one uplink network node or the at least one downlink network node. Additionally or alternatively, the communication manager 150 may perform one or more other operations described herein.
[0066] The network node 110, the UE 120, the processing system 140 of the UE 120, a CU, a DU, an RU, or any other component (s) of Figure 1 may implement one or more techniques or perform one or more operations associated with power headroom reporting in an uplink transmission mode, as described in more detail elsewhere herein. For example, the processing system 140 of the UE 120, a CU, a DU, and / or an RU may perform or direct operations of, for example, process 800 of Figure 8, or other processes as described herein (alone or in conjunction with one or more other processors) .
[0067] Memory of a network node 110 may store data and program code (or instructions) for the network node 110, a CU, a DU, or an RU. In some examples, the memory of the network node 110 may store data relating to a UE 120, such as RRC state information or a UE context. Memory of a UE 120 may store data and program code (or instructions) for the UE 120, such as context information. In some examples, the memory of the UE 120 or the memory of the network node 110 may include a non-transitory computer-readable medium storing a set of instructions for wireless communication. For example, the set of instructions, when executed by one or more processors (for example, of the processing system 140) of the network node 110, the UE 120, a CU, a DU, and / or an RU, may cause the one or more processors to perform process 800 of Figure 8, or other processes as described herein. In some examples, executing instructions may include running the instructions, converting the instructions, compiling the instructions, and / or interpreting the instructions, among other examples.
[0068] In some aspects, the UE 120 includes means for receiving an indication of an uplink transmission mode associated with at least one uplink network node and at least one downlink network node; and / or means for transmitting, in accordance with the uplink transmission mode, one or more PHRs associated with one or more of the at least one uplink network node or the at least one downlink network node. The means for the UE 120 to perform operations described herein may include, for example, one or more of communication manager 150, processing system 140, a radio, one or more RF chains, one or more transceivers, one or more antennas, one or more modems, a reception component (for example, reception component 902 depicted and described in connection with Figure 9) , and / or a transmission component (for example, transmission component 904 depicted and described in connection with Figure 9) , among other examples.
[0069] Figure 2 is a diagram illustrating an example 200 of an asymmetric downlink / uplink TRP scenario, in accordance with the present disclosure.
[0070] Example 200 shows a plurality of network nodes 110 (1) -110 (5) and a UE 120. The plurality of network nodes 110 (1) -110 (5) may be deployed in an uplink-dense arrangement, which may enable asymmetric downlink / uplink densification and thereby help to improve coverage and / or capacity for uplink transmissions. For example, the network node 110 (1) may be a base station (for example, a gNB, a macro node, a central node, a serving cell, or a serving base station, among other examples) that is capable of downlink communication and uplink communication, and network nodes 110(2) -110 (5) may be uplink-only TRPs. The network node 110 (1) may be referred to as a downlink network node, and the network nodes 110 (2) -110 (5) may be referred to as uplink network nodes. The network nodes 110 (2) -110 (5) may be connected to the network node 110 (1) via a backhaul.
[0071] In a first operation 210, the network node 110 (1) may transmit downlink signals over one or more downlink channels to the UE 120. In a second operation 220, the UE 120 may transmit uplink signals over one or more uplink channels to the network node 110 (3) , which may process the uplink transmission and / or relay the uplink transmission to the network node 110 over the backhaul. The network nodes 110(2) -110 (5) may thereby help to reduce uplink pathloss (for example, in examples where uplink coverage is bottlenecked) . Additionally or alternatively, the network nodes 110 (2) -110 (5) may help to reduce deployment complexity by refraining from transmitting any downlink signals.
[0072] Figure 3 is a diagram illustrating an example 300 of a PHR MAC-CE, in accordance with the present disclosure.
[0073] The PHR MAC-CE includes power headroom presence ( “Ci” ) fields, reserved (“R” ) fields, power backoff ( “P” ) fields, power headroom value format ( “V” ) fields, power headroom ( “PH” ) fields, power headroom calculation ( “PCMAX, f, c” ) fields, and maximum permissible exposure (MPE) fields. A Ci field may indicate the presence of one or more power headroom fields for a serving cell having a serving cell index i. The Ci field may be set to 1, which may indicate that one or more power headroom fields for the serving cell having the serving cell index i are reported. The Ci field may be set to 0, which may indicate that one or more power headroom fields for the serving cell having the serving cell index i are not reported.
[0074] A power backoff field may indicate whether the UE 120 applies power backoff due to power management. A power headroom value format field may indicate whether a value in the power headroom field is associated with an actual transmission (for example, a real transmission) or a reference format. A power headroom field may indicate a power headroom level. In some examples, the length of the power headroom field may be 6 bits. The power headroom calculation field may indicate a value that the network node 110 can use to calculate the power headroom level.
[0075] If an mpe-Reporting-FR2 parameter is configured, the serving cell operates on FR2, and the power backoff field indicates that the UE 120 applies a power backoff due to power management (for example, the power backoff field is set to 1) , then the MPE field may indicate an applied power backoff to meet MPE requirements. If the mpe-Reporting-FR2 parameter is not configured, if the serving cell operates on FR1, or if power backoff field indicates that the UE 120 does not apply a power backoff due to power management (for example, the power backoff field is set to 1) , then an R field containing reserved bits may be present instead of the MPE field.
[0076] In some examples, a UE may transmit a PHR for an mTRP PUSCH repetition. For example, if a UE 120 is not configured with a twoPHRMode parameter, and if the UE is provided with two SRS resource sets in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 with a usage set to “codebook” or “nonCodebook” on an active uplink BWP b of a carrier f of a serving cell c, then the UE may transmit one type 1 PHR in a slot n. If the type 1 PHR is for an actual PUSCH repetition, then the type 1 PHR may be for the first PUSCH repetition associated with the first SRS resource set or the second SRS resource set that overlaps with the slot n.
[0077] Figure 4 is a diagram illustrating an example 400 of an mTRP scenario, in accordance with the present disclosure.
[0078] A UE 120 may receive downlink communications from a first set ( “set A” ) of network nodes (for example, TRPs) , and may transmit uplink communications to a second set ( “set B” ) of network nodes (for example, TRPs) , where set A and set B are not identical. TRP As may be referred to as downlink network nodes, and TRP Bs may be referred to as uplink network nodes. In example 400, UE 120 may receive downlink communications (for example, PDSCH communications) from the network node 110 (1) and transmit uplink communications (for example, PUSCH communications) to the network node 110 (2) . In some examples, the UE 120 may also transmit SRSs to the network node 110 (1) , which may enable the network node 110 (1) to acquire CSI of the downlink channel. In some examples, the network node 110 (2) can transmit PDSCH communications, but does not do so for some length of time due to load balancing or other network considerations. In a first operation 410, the UE 120 may transmit, to the network node 110 (2) , a type 1 PHR for PUSCH transmission. The type 1 PHR may be associated with a codebook setting or a non-codebook setting.
[0079] Traditionally, when PUSCH communication is configured in a serving cell, type 3 PHR is absent, and the UE 120 would transmit only type 1 PHRs (and not type 3 PHRs) per serving cell. As a result, in asymmetric downlink / uplink TRP scenarios, the UE 120 would be prohibited from transmitting type 3 PHRs to the network node 110 (1) . However, this prohibition may hinder radio resource allocation with respect to UE SRS transmission power. Accordingly, implementations are provided herein that enable the UE 120 to handle, trigger, and / or transmit different types of PHRs (for example type 1 PHRs and / or type 3 PHRs) in one serving cell while PUSCH communication is configured in the serving cell. For example, in a second operation 420, the UE 120 may transmit a type 3 PHR to the network node 110 (1) .
[0080] Figure 5 is a diagram illustrating an example 500 associated with PHR signaling in an uplink transmission mode, in accordance with the present disclosure. As shown in Figure 5, one or more network nodes 110 and a UE 120 may communicate with one another.
[0081] In a first operation 510, the UE 120 may transmit, and a network node 110 may receive, an indication of an uplink transmission mode associated with at least one uplink network node and at least one downlink network node. An uplink network node may be a TRP B, and a downlink network node may be a TRP A. The uplink transmission mode may be a wireless communication scheme to which the UE 120 conforms when transmitting uplink communications. For example, the uplink transmission mode may control how the UE 120 transmits uplink communications in an asymmetric downlink / uplink TRP scenario, such as an asymmetric downlink / uplink TRP scenario discussed above in connection with Figure 2. The uplink transmission mode may be associated with the at least one uplink network node in that the uplink transmission mode may control whether the UE 120 may, while in the uplink transmission mode, transmit uplink communications to the at least one uplink network node. The uplink transmission mode may be associated with the at least one downlink network node in that the uplink transmission mode may control whether the UE 120 may, while in the uplink transmission mode, transmit uplink communications to the at least one downlink network node.
[0082] In some aspects, the uplink transmission mode may associate uplink transmission with the at least one uplink network node and the at least one downlink network node. The uplink transmission mode ( “uplink transmission mode 1” ) may associate uplink transmission with the at least one uplink network node and the at least one downlink network node in that the UE 120 may, while in the uplink transmission mode, transmit uplink communications to the at least one uplink network node and the at least one downlink network node. For example, the UE 120 may transmit uplink communications to at least one TRP B and at least one TRP A in an mTRP scenario. Additionally or alternatively, the uplink transmission mode may associate uplink transmission with one downlink network node (for example, one TRP A) in a single TRP (sTRP) scenario.
[0083] In some aspects, the at least one uplink network node may include a plurality of uplink network nodes, and the uplink transmission mode may associate uplink transmission with the plurality of uplink network nodes. The uplink transmission mode (“uplink transmission mode 2” ) may associate uplink transmission with the plurality of uplink network nodes in that the UE 120 may, while in the uplink transmission mode, transmit uplink communications to the plurality of uplink network nodes. For example, the UE 120 may transmit uplink communications to at least two TRP Bs in an mTRP scenario. Additionally or alternatively, the uplink transmission mode may associate uplink transmission with one uplink network node (for example, one TRP B) in an sTRP scenario.
[0084] In some aspects, the indication of the uplink transmission mode may be an RRC configuration or a dynamic indication. For example, the uplink transmission mode may be RRC configured or dynamically indicated. For example, whether the UE 120 transmits uplink transmissions in uplink transmission mode 1 or uplink transmission mode 2 may depend on whether the RRC configuration or the dynamic indication indicates uplink transmission mode 1 or uplink transmission mode 2.
[0085] In some aspects, at least one TCI state corresponding to the at least one uplink network node may be associated with at least one pathloss offset. The at least one TCI state may be associated with the at least one pathloss offset in that the at least one pathloss offset may be applied to an uplink communication that is transmitted using the at least one TCI state. In some examples, the dynamic indication may include an indication of the at least one TCI state. For example, for uplink transmission mode 1, one TCI state of indicated candidate TCI states may be associated with a pathloss offset. Additionally or alternatively, for uplink transmission mode 2, two TCI states of indicated candidate TCI states may be associated with pathloss offsets. In some examples, in uplink transmission mode 2, the TRP A may be configured with SRS communications that do not follow a unified TCI framework.
[0086] In a second operation 520, the UE 120 may transmit, and a network node 110 may receive, one or more PHRs associated with one or more of the at least one uplink network node or the at least one downlink network node. The one or more PHRs may be associated with the one or more of the at least one uplink network node or the at least one downlink network node in that the one or more of the at least one uplink network node or the at least one downlink network node may be target recipients for the one or more PHRs. In some aspects, the UE 120 may transmit, and the network node 110 may receive, the one or more PHRs in accordance with the uplink transmission mode. For example, the target recipient for the one or more PHRs may depend on the uplink transmission mode (for example, whether the uplink transmission mode is uplink transmission mode 1 or uplink transmission mode 2) .
[0087] The one or more PHRs may include one or more PHRs having actual transmission types or one or more PHRs having reference transmission types (for example, as indicated by a power headroom value format field (s) of the PHR (s) , as discussed in connection with Figure 3 above) . For example, a type 1 PHR having an actual transmission type may report a power headroom for one or more resources allocated for PUSCH, and a PHR having a reference transmission type may report a reference power headroom value (for example, in situations where one or more resources are not allocated for PUSCH) . A PHR having an actual transmission type may be based at least in part on or otherwise associated with an actual transmission, and a PHR having a reference transmission type may be based at least in part on or otherwise associated with a reference transmission. Table 1 below shows all eight scenarios involving respective combinations of actual transmission types and / or reference transmission types in which the UE 120 selects the one or more PHRs from among three candidate PHRs (PHR #1, PHR #2, and PHR #3) .
[0088] Table 1
[0089] In some aspects, the UE 120 may be associated with a single-PHR mode. The single-PHR mode may be a mode in which the UE 120 can trigger multiple candidate PHRs and transmit (for example, report) a single PHR of the candidate PHRs. The UE 120 may be associated with the single-PHR mode in that the UE 120 may be configured to operate in the single-PHR mode. For example, a network node 110 may configure the UE 120 using a singlePHRmode parameter. In some examples, the UE 120 may operate in the single-TRP mode in an mTRP scenario. In some aspects, the one or more PHRs may be a single PHR. For example, the UE 120 may transmit a single PHR in accordance with the uplink transmission mode.
[0090] In some aspects, the UE 120 may transmit the single PHR by selecting a candidate type 1 PHR from among a plurality of candidate type 1 PHRs and selecting the single PHR from among the candidate type 1 PHR and a candidate type 3 PHR. For example, the UE 120 may first select the candidate type 1 PHR from among two available (for example, candidate) type 1 PHRs, and then compare the type 1 PHR with the Type 3 PHR to identify which PHR to transmit. In some aspects, the UE 120 may select a candidate type 1 PHR from among a plurality of candidate type 1 PHRs in accordance with a first PUSCH repetition associated with (for example, corresponding to) the candidate type 1 PHR or a TCI state associated with (for example, corresponding to) the candidate type 1 PHR. For example, the UE 120 may prioritize a type 1 PHR that is associated with the first PUSCH repetition or a type 1 PHR that is associated with a first TCI state in the indicated TCI states. In some aspects, the UE 120 may select the single PHR from among the candidate type 1 PHR and the candidate type 3 PHR in accordance with a transmission type of the candidate type 1 PHR and a transmission type of the candidate type 3 PHR. For example, the UE 120 may prioritize a PHR having an actual transmission type over a PHR having a reference transmission type.
[0091] In some aspects, the transmission type of the candidate type 1 PHR and the transmission type of the candidate type 3 PHR may be the same transmission type. For example, both the candidate type 1 PHR and the candidate type 3 PHR may have an actual transmission type, or both the candidate type 1 PHR and the candidate type 3 PHR may have a reference transmission type. In some aspects, the single PHR may be the candidate type 1 PHR in accordance with the transmission type of the candidate type 1 PHR and the transmission type of the candidate type 3 PHR being the same transmission type. For example, if the transmission type of the candidate type 1 PHR and the transmission type of the candidate type 3 PHR are the same transmission type, then the UE 120 may transmit the candidate type 1 PHR. In some aspects, the single PHR may be the candidate type 3 PHR in accordance with the transmission type of the candidate type 1 PHR and the transmission type of the candidate type 3 PHR being the same transmission type. For example, if the transmission type of the candidate type 1 PHR and the transmission type of the candidate type 3 PHR are the same transmission type, then the UE 120 may transmit the candidate type 3 PHR. In some aspects, the UE 120 may select the single PHR in accordance with an RRC configuration. For example, if the transmission type of the candidate type 1 PHR and the transmission type of the candidate type 3 PHR are the same transmission type, then whether the UE 120 transmits the candidate type 1 PHR or the candidate type 3 PHR may depend on the RRC configuration. For example, the RRC configuration may configure the UE 120 to transmit the candidate type 1 PHR, or the RRC configuration may configure the UE 120 to transmit the candidate type 3 PHR.
[0092] Table 2 below shows, for each of the eight scenarios shown above in Table 1, PHR transmission results in examples where the UE 120 transmits the single PHR by selecting the candidate type 1 PHR from among the plurality of candidate type 1 PHRs and selecting the single PHR from among the candidate type 1 PHR and the candidate type 3 PHR. The PHR transmission results are provided under the assumption that PHR #1 is prioritized over PHR #2.
[0093] Table 2
[0094] In some aspects, the UE 120 may transmit the single PHR by selecting the single PHR from among a plurality of candidate PHRs in accordance with one or more transmission types of the plurality of candidate PHRs. For example, the UE 120 may prioritize candidate PHRs having an actual transmission type.
[0095] In some aspects, the one or more transmission types may be a single transmission type. For example, the plurality of candidate PHRs may have the same transmission type. In some aspects, the single PHR may be a type 1 PHR in accordance with the one or more transmission types being the single transmission type. For example, if the one or more transmission types are a single transmission type, then the UE 120 may transmit the type 1 PHR. In some aspects, the single PHR is a type 3 PHR in accordance with the one or more transmission types being the single transmission type. For example, if the one or more transmission types are a single transmission type, then the UE 120 may transmit the type 3 PHR. In some aspects, the UE 120 may select the type 1 PHR or the type 3 PHR in accordance with an RRC configuration. For example, if the transmission type of the type 1 PHR and the transmission type of the type 3 PHR are the same transmission type, then whether the UE 120 transmits the type 1 PHR or the type 3 PHR may depend on the RRC configuration. For example, the RRC configuration may configure the UE 120 to transmit the type 1 PHR, or the RRC configuration may configure the UE 120 to transmit the type 3 PHR. In some aspects, the plurality of candidate PHRs may include a plurality of candidate type 1 PHRs, and the UE 120 may select the single PHR from among the plurality of candidate type 1 PHRs in accordance with a first PUSCH repetition associated with (for example, corresponding to) the single PHR or a TCI state associated with (for example, corresponding to) the single PHR. For example, if the plurality of candidate type 1 PHRs (for example, two candidate type 1 PHRs) have the same transmission type, then the UE 120 may prioritize a candidate type 1 PHR that is associated with the first PUSCH repetition or a candidate type 1 PHR that is associated with a first TCI state in the indicated TCI states.
[0096] Table 3 below shows, for each of the eight scenarios shown above in Table 1, PHR transmission results in examples where the UE 120 selects the single PHR from among a plurality of candidate PHRs in accordance with one or more transmission types of the plurality of candidate PHRs. The PHR transmission results are provided under the assumption that PHR #1 is prioritized over PHR #2.
[0097] Table 3
[0098] In some aspects, the UE 120 may transmit the single PHR by selecting the single PHR from among a plurality of candidate type 1 PHRs in accordance with the uplink transmission mode. For example, in uplink transmission mode 1, the UE 120 may not trigger type 3 PHRs. As a result, the UE 120 may, in uplink transmission mode 1, trigger the plurality of candidate type 1 PHRs (for example, two candidate type 1 PHRs) . The UE 120 may prioritize a candidate type 1 PHR that is associated with the first PUSCH repetition or a candidate type 1 PHR that is associated with a first TCI state in the indicated TCI states.
[0099] Table 4 below shows, for each of the eight scenarios shown above in Table 1, PHR transmission results in examples where the UE 120 selects the single PHR from among a plurality of candidate type 1 PHRs in accordance with the uplink transmission mode. The PHR transmission results are provided under the assumption that PHR #1 is prioritized over PHR #2 and the assumption that the UE 120 is operating in uplink transmission mode 1.
[0100] Table 4
[0101] In some aspects, the UE 120 may be associated with a two-PHR mode. The two-PHR mode may be a mode in which the UE 120 can trigger multiple candidate PHRs and transmit (for example, report) up to two PHRs of the candidate PHRs. The UE 120 may be associated with the two-PHR mode in that the UE 120 may be configured to operate in the two-PHR mode. For example, a network node 110 may configure the UE 120 using a twoPHRmode parameter. In some examples, the UE 120 may operate in the two-TRP mode in an mTRP scenario.
[0102] In some aspects, the UE 120 may transmit the one or more PHRs by selecting the one or more PHRs in accordance with one or more of a prioritization of actual transmission types over reference transmission types or a prioritization of type 1 PHRs over type 3 PHRs. For example, the UE 120 may prioritize PHRs having actual transmission types over PHRs having reference transmission types, and / or the UE 120 may prioritize type 1 PHRs over type 3 PHRs. In some examples, the UE 120 may transmit two type 1 PHRs if the two type 1 PHRs have an actual transmission type (regardless of the transmission type of the type 3 PHR) . In some examples, the UE 120 may transmit two type 1 PHRs if the type 3 PHR has a reference transmission type (regardless of the transmission type of the two type 1 PHRs) . In some examples, if the two type 1 PHRs have reference transmission types and the type 3 PHR has an actual transmission type, then the UE 120 may transmit the type 3 PHR and neither of the type 1 PHRs, or the UE 120 may transmit one type 1 PHR and the type 3 PHR. In examples where the two type 1 PHRs have reference transmission types and the type 3 PHR has an actual transmission type and the UE 120 transmits the one type 1 PHR and the type 3 PHR, the UE 120 may prioritize the type 1 PHR (over the other type 1 PHR) that is associated with the first TCI state, that is associated with the second TCI state, in accordance with an RRC configuration, that is associated with the first PUSCH repetition, or that is associated with the second PUSCH repetition. In some examples, the UE 120 may transmit one type 1 PHR and the type 3 PHR if the type 1 PHR has an actual transmission type and the type 3 PHR has an actual transmission type.
[0103] Table 5 below shows, for each of the eight scenarios shown above in Table 1, PHR transmission results in examples where the UE 120 transmits the single PHR by selecting the one or more PHRs in accordance with one or more of a prioritization of actual transmission types over reference transmission types or a prioritization of type 1 PHRs over type 3 PHRs.
[0104] Table 5
[0105] In some aspects, the UE 120 may transmit the one or more PHRs by selecting the one or more PHRs in accordance with one or more of a prioritization of actual transmission types over reference transmission types or a prioritization of type 3 PHRs over type 1 PHRs. For example, the UE 120 may prioritize PHRs having actual transmission types over PHRs having reference transmission types, and / or the UE 120 may prioritize type 3 PHRs over type 1 PHRs. In some examples, the UE 120 may transmit the type 3 PHR if the type 3 PHR has an actual transmission type (regardless of the transmission type (s) of the type 1 PHRs) . In some examples, the UE 120 may transmit the type 3 PHR if the type 1 PHRs have reference transmission types (regardless of the transmission type of the type 3 PHR) . In some examples, the UE 120 may transmit the two type 1 PHRs if the two type 1 PHRs have actual transmission types and the type 3 PHR has a reference transmission type. In some examples, the UE 120 may transmit one type 1 PHR and the type 3 PHR if the type 1 PHR has an actual transmission type and the type 3 PHR has a reference transmission type.
[0106] Table 6 below shows, for each of the eight scenarios shown above in Table 1, PHR transmission results in examples where the UE 120 transmits the one or more PHRs by selecting the one or more PHRs in accordance with one or more of a prioritization of actual transmission types over reference transmission types or a prioritization of type 3 PHRs over type 1 PHRs.
[0107] Table 6
[0108] In some aspects, the UE 120 may transmit the one or more PHRs by selecting the one or more PHRs from among a plurality of candidate type 1 PHRs in accordance with the uplink transmission mode. For example, in uplink transmission mode 1, the UE 120 may not trigger type 3 PHRs. As a result, the UE 120 may, in uplink transmission mode 1, transmit one or more of the plurality of candidate type 1 PHRs (for example, two candidate type 1 PHRs) .
[0109] In some aspects, the UE 120 may be associated with a three-PHR mode. The three-PHR mode may be a mode in which the UE 120 can trigger multiple candidate PHRs and transmit (for example, report) up to three PHRs of the candidate PHRs. The UE 120 may be associated with the three-PHR mode in that the UE 120 may be configured to operate in the three-PHR mode. For example, a network node 110 may configure the UE 120 using a threePHRmode parameter. In some examples, the UE 120 may operate in the three-TRP mode in an mTRP scenario.
[0110] In some aspects, the one or more PHRs may be associated with a component carrier. The one or more PHRs may be associated with the component carrier in that the one or more PHRs may be transmitted in accordance with a three-PHR mode that is configured on a per-component-carrier basis. For example, the three-PHR mode may be enabled in a CC n when the CC n is configured using the threePHRmode parameter via RRC configuration.
[0111] In some aspects, the UE 120 may transmit the one or more PHRs by transmitting a MAC-CE that includes the one or more PHRs. For example, the MAC-CE (which may be referred to as a “PHR MAC-CE” ) may carry up to three PHRs for a component carrier for which three-PHR mode is configured. An example MAC-CE that includes the one or more PHRs is discussed below in connection with Figure 7.
[0112] Figure 6 is a diagram illustrating examples 600 and 610 associated with uplink transmission mode 1 and uplink transmission mode 2, in accordance with the present disclosure. Examples 600 and 610 include a network node 110 (1) (for example, a TRP A) , a network node 110 (2) (for example, a TRP B) , a network node 110 (3) (for example, a TRP B) , and a UE 120. For example, the network node 110 (1) may be a downlink network node, and the network nodes 110 (2) and 110 (3) may be uplink network nodes.
[0113] Example 600 shows an asymmetric downlink / uplink TRP scenario in which uplink transmission mode 1 is applied. In uplink transmission mode 1, the UE 120 may transmit uplink communications to the network node 110 (1) and the network node 110(2) . For example, in a first operation 620, the UE 120 may transmit a PUSCH communication to the network node 110 (1) , and in a second operation 630, the UE 120 may transmit a PUSCH communication to the network node 110 (2) . The UE 120 may transmit a type 1 PHR and / or a type 3 PHR to the network node 110 (1) , and / or a type 1 PHR to the network node 110 (2) .
[0114] Example 610 shows an asymmetric downlink / uplink TRP scenario in which uplink transmission mode 2 is applied. In uplink transmission mode 2, the UE 120 may transmit uplink communications to the network node 110 (2) and the network node 110(3) . For example, in a third operation 640, the UE 120 may transmit a PUSCH communication to the network node 110 (2) , and in a fourth operation 650, the UE 120 may transmit a PUSCH communication to the network node 110 (3) . The UE 120 may transmit a type 3 PHR to the network node 110 (1) , a type 1 PHR to the network node 110(2) , and / or a type 1 PHR to the network node 110 (3) .
[0115] Figure 7 is a diagram illustrating an example 700 associated with a PHR MAC-CE for the three-PHR mode, in accordance with the present disclosure.
[0116] The PHR MAC-CE includes power headroom presence ( “Ci” ) fields, reserved (“R” ) fields, power backoff ( “P” ) fields, power headroom value format ( “V” ) fields, power headroom ( “PH” ) fields, MPE fields, and power headroom calculation ( “PC, MAX” ) fields, as discussed above in connection with Figure 3. In example 700, the PHR MAC-CE may include at least a first set of power headroom fields 710 and a second set of power headroom fields 720. The first set of power headroom fields 710 may include three power headroom fields in a three-PHR mode associated with a serving cell. The three power headroom fields may include a first type 1 power headroom level, a second type 1 power headroom level, and a third type 3 power headroom level. The second set of power headroom fields 720 may include two power headroom fields in a two-PHR mode associated with another serving cell.
[0117] Transmitting the one or more PHRs in accordance with the uplink transmission mode may help to improve radio resource allocation performed by a network node 110 by enabling the UE 120 to handle, trigger, and / or transmit different types of PHRs (for example, type 1 PHRs and / or type 3 PHRs) . For example, in asymmetric downlink / uplink TRP scenarios, the UE 120 may perform type 3 PHR triggering for SRSs transmitted to TRP Bs for downlink CSI acquisition.
[0118] The UE 120 being associated with the single-PHR mode, and the one or more PHRs being the single PHR, may enable the UE 120 to perform type 3 PHR triggering in asymmetric downlink / uplink TRP scenarios in examples where the UE 120 is not capable of transmitting multiple PHRs.
[0119] The UE 120 being associated with the two-PHR mode may help to further improve radio resource allocation performed by a network node 110. For example, the UE may transmit two PHRs in examples where the UE 120 is not capable of transmitting more than two PHRs, which may provide more radio resource allocation information than a single PHR.
[0120] The UE 120 being associated with the three-PHR mode may help to further improve radio resource allocation. For example, the UE 120 may transmit three PHRs, which may provide more radio resource allocation information than one or two PHRs.
[0121] Figure 8 is a flowchart illustrating an example process 800 performed, for example, at a UE or an apparatus of a UE that supports power headroom reporting in an uplink transmission mode, in accordance with the present disclosure. Example process 800 is an example where the apparatus or the UE (for example, UE 120) performs operations associated with power headroom reporting in an uplink transmission mode.
[0122] As shown in Figure 8, in some aspects, process 800 may include receiving an indication of an uplink transmission mode associated with at least one uplink network node and at least one downlink network node (block 810) . For example, the UE (such as by using communication manager 150 or reception component 902, depicted in Figure 9) may receive an indication of an uplink transmission mode associated with at least one uplink network node and at least one downlink network node, as described above.
[0123] As further shown in Figure 8, in some aspects, process 800 may include transmitting, in accordance with the uplink transmission mode, one or more PHRs associated with one or more of the at least one uplink network node or the at least one downlink network node (block 820) . For example, the UE (such as by using communication manager 150 or transmission component 904, depicted in Figure 9) may transmit, in accordance with the uplink transmission mode, one or more PHRs associated with one or more of the at least one uplink network node or the at least one downlink network node, as described above.
[0124] Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below or in connection with one or more other processes described elsewhere herein.
[0125] In a first additional aspect, the uplink transmission mode associates uplink transmission with the at least one uplink network node and the at least one downlink network node.
[0126] In a second additional aspect, alone or in combination with the first aspect, the at least one uplink network node includes a plurality of uplink network nodes, and the uplink transmission mode associates uplink transmission with the plurality of uplink network nodes.
[0127] In a third additional aspect, alone or in combination with one or more of the first and second aspects, the indication of the uplink transmission mode is an RRC configuration or a dynamic indication.
[0128] In a fourth additional aspect, alone or in combination with one or more of the first through third aspects, at least one TCI state corresponding to the at least one uplink network node is associated with a pathloss offset.
[0129] In a fifth additional aspect, alone or in combination with one or more of the first through fourth aspects, the UE is associated with a single-PHR mode, and the one or more PHRs are a single PHR.
[0130] In a sixth additional aspect, alone or in combination with one or more of the first through fifth aspects, transmitting the single PHR includes selecting a candidate type 1 PHR from among a plurality of candidate type 1 PHRs in accordance with a first PUSCH repetition associated with the candidate type 1 PHR or a TCI state associated with the candidate type 1 PHR, and selecting the single PHR from among the candidate type 1 PHR and a candidate type 3 PHR in accordance with a transmission type of the candidate type 1 PHR and a transmission type of the candidate type 3 PHR.
[0131] In a seventh additional aspect, alone or in combination with one or more of the first through sixth aspects, the transmission type of the candidate type 1 PHR and the transmission type of the candidate type 3 PHR are a same transmission type, and the single PHR is the candidate type 1 PHR in accordance with the transmission type of the candidate type 1 PHR and the transmission type of the candidate type 3 PHR being the same transmission type, the single PHR is the candidate type 3 PHR in accordance with the transmission type of the candidate type 1 PHR and the transmission type of the candidate type 3 PHR being the same transmission type, or selecting the single PHR includes selecting the single PHR in accordance with an RRC configuration.
[0132] In an eighth additional aspect, alone or in combination with one or more of the first through seventh aspects, transmitting the single PHR comprises selecting the single PHR from among a plurality of candidate PHRs in accordance with one or more transmission types of the plurality of candidate PHRs.
[0133] In a ninth additional aspect, alone or in combination with one or more of the first through eighth aspects, the one or more transmission types are a single transmission type, and the single PHR is a type 1 PHR in accordance with the one or more transmission types being the single transmission type, the single PHR is a type 3 PHR in accordance with the one or more transmission types being the single transmission type, selecting the single PHR includes selecting the type 1 PHR or the type 3 PHR in accordance with an RRC configuration, or the plurality of candidate PHRs includes a plurality of candidate type 1 PHRs, and selecting the single PHR includes selecting the single PHR from among the plurality of candidate type 1 PHRs in accordance with a first PUSCH repetition associated with the single PHR or a TCI state associated with the single PHR.
[0134] In a tenth additional aspect, alone or in combination with one or more of the first through ninth aspects, transmitting the single PHR comprises selecting the single PHR from among a plurality of candidate type 1 PHRs in accordance with the uplink transmission mode.
[0135] In an eleventh additional aspect, alone or in combination with one or more of the first through tenth aspects, the UE is associated with a two-PHR mode.
[0136] In a twelfth additional aspect, alone or in combination with one or more of the first through eleventh aspects, transmitting the one or more PHRs includes selecting the one or more PHRs in accordance with one or more of a prioritization of actual transmission types over reference transmission types or a prioritization of type 1 PHRs over type 3 PHRs.
[0137] In a thirteenth additional aspect, alone or in combination with one or more of the first through twelfth aspects, transmitting the one or more PHRs includes selecting the one or more PHRs in accordance with one or more of a prioritization of actual transmission types over reference transmission types or a prioritization of type 3 PHRs over type 1 PHRs.
[0138] In a fourteenth additional aspect, alone or in combination with one or more of the first through thirteenth aspects, transmitting the one or more PHRs includes selecting the one or more PHRs from among a plurality of candidate type 1 PHRs in accordance with the uplink transmission mode.
[0139] In a fifteenth additional aspect, alone or in combination with one or more of the first through fourteenth aspects, the UE is associated with a three-PHR mode.
[0140] In a sixteenth additional aspect, alone or in combination with one or more of the first through fifteenth aspects, the one or more PHRs are associated with a component carrier.
[0141] In a seventeenth additional aspect, alone or in combination with one or more of the first through sixteenth aspects, transmitting the one or more PHRs includes transmitting a MAC-CE that includes the one or more PHRs.
[0142] Although Figure 8 shows example blocks of process 800, in some aspects, process 800 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Figure 8. Additionally or alternatively, two or more of the blocks of process 800 may be performed in parallel.
[0143] Figure 9 is a diagram of an example apparatus 900 for wireless communication that supports power headroom reporting in an uplink transmission mode, in accordance with the present disclosure. The apparatus 900 may be a UE, or a UE may include the apparatus 900. In some aspects, the apparatus 900 includes a reception component 902, a transmission component 904, and a communication manager 906, which may be in communication with one another (for example, via one or more buses) . As shown, the apparatus 900 may communicate with another apparatus 908 (such as a UE 120, a network node 110, or another wireless communication device) using the reception component 902 and the transmission component 904. The communication manager 906 may be included in, or implemented via, a processing system (for example, the processing system 140) . In some aspects, the communication manager 906 is the communication manager 150.
[0144] In some aspects, the apparatus 900 may be configured to and / or operable to perform one or more operations described herein in connection with Figures 5-7. Additionally or alternatively, the apparatus 900 may be configured to and / or operable to perform one or more processes described herein, such as process 800 of Figure 8.
[0145] The reception component 902 may receive communications, such as reference signals, control information, and / or data communications, from the apparatus 908. The reception component 902 may provide received communications to one or more other components of the apparatus 900, such as the communication manager 906. In some aspects, the reception component 902 may perform signal processing on the received communications, and may provide the processed signals to the one or more other components in a similar manner as described above in connection with Figure 1. In some aspects, the reception component 902 may include one or more components of the UE described above in connection with Figure 1, such as a radio, one or more RF chains, one or more transceivers, or one or more modems, each of which may in turn be coupled with one or more antennas of the UE.
[0146] The transmission component 904 may transmit communications, such as reference signals, control information, and / or data communications, to the apparatus 908. In some aspects, the communication manager 906 may generate communications and may transmit the generated communications to the transmission component 904 for transmission to the apparatus 908. In some aspects, the transmission component 904 may perform signal processing on the generated communications, and may transmit the processed signals to the apparatus 908 in a similar manner as described above in connection with Figure 1. In some aspects, the transmission component 904 may include one or more components of the UE described above in connection with Figure 1, such as a radio, one or more RF chains, one or more transceivers, or one or more modems, each of which may in turn be coupled with one or more antennas of the UE. In some aspects, the transmission component 904 may be co-located with the reception component 902.
[0147] The communication manager 906 may receive or may cause the reception component 902 to receive an indication of an uplink transmission mode associated with at least one uplink network node and at least one downlink network node. The communication manager 906 may transmit or may cause the transmission component 904 to transmit, in accordance with the uplink transmission mode, one or more PHRs associated with one or more of the at least one uplink network node or the at least one downlink network node. In some aspects, the communication manager 906 may perform one or more operations described elsewhere herein as being performed by one or more components of the communication manager 906.
[0148] The reception component 902 may receive an indication of an uplink transmission mode associated with at least one uplink network node and at least one downlink network node. The transmission component 904 may transmit, in accordance with the uplink transmission mode, one or more PHRs associated with one or more of the at least one uplink network node or the at least one downlink network node.
[0149] The quantity and arrangement of components shown in Figure 9 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Figure 9. Furthermore, two or more components shown in Figure 9 may be implemented within a single component, or a single component shown in Figure 9 may be implemented as multiple, distributed components. Additionally or alternatively, a set of (one or more) components shown in Figure 9 may perform one or more functions described as being performed by another set of components shown in Figure 9.
[0150] The following provides an overview of some Aspects of the present disclosure:
[0151] Aspect 1: A method of wireless communication performed at a user equipment (UE) , comprising: receiving an indication of an uplink transmission mode associated with at least one uplink network node and at least one downlink network node; and transmitting, in accordance with the uplink transmission mode, one or more power headroom reports (PHRs) associated with one or more of the at least one uplink network node or the at least one downlink network node.
[0152] Aspect 2: The method of Aspect 1, wherein the uplink transmission mode associates uplink transmission with the at least one uplink network node and the at least one downlink network node.
[0153] Aspect 3: The method of any of Aspects 1-2, wherein the at least one uplink network node includes a plurality of uplink network nodes, and wherein the uplink transmission mode associates uplink transmission with the plurality of uplink network nodes.
[0154] Aspect 4: The method of any of Aspects 1-3, wherein the indication of the uplink transmission mode is a radio resource control (RRC) configuration or a dynamic indication.
[0155] Aspect 5: The method of any of Aspects 1-4, wherein at least one transmission configuration indicator (TCI) state corresponding to the at least one uplink network node is associated with a pathloss offset.
[0156] Aspect 6: The method of any of Aspects 1-5, wherein the UE is associated with a single-PHR mode, and wherein the one or more PHRs are a single PHR.
[0157] Aspect 7: The method of Aspect 6, wherein transmitting the single PHR includes: selecting a candidate type 1 PHR from among a plurality of candidate type 1 PHRs in accordance with a first physical uplink shared channel (PUSCH) repetition associated with the candidate type 1 PHR or a transmission configuration indicator (TCI) state associated with the candidate type 1 PHR, and selecting the single PHR from among the candidate type 1 PHR and a candidate type 3 PHR in accordance with a transmission type of the candidate type 1 PHR and a transmission type of the candidate type 3 PHR.
[0158] Aspect 8: The method of Aspect 7, wherein the transmission type of the candidate type 1 PHR and the transmission type of the candidate type 3 PHR are a same transmission type, and: wherein the single PHR is the candidate type 1 PHR in accordance with the transmission type of the candidate type 1 PHR and the transmission type of the candidate type 3 PHR being the same transmission type, wherein the single PHR is the candidate type 3 PHR in accordance with the transmission type of the candidate type 1 PHR and the transmission type of the candidate type 3 PHR being the same transmission type, or wherein selecting the single PHR includes selecting the single PHR in accordance with a radio resource control (RRC) configuration.
[0159] Aspect 9: The method of Aspect 6, wherein transmitting the single PHR comprises: selecting the single PHR from among a plurality of candidate PHRs in accordance with one or more transmission types of the plurality of candidate PHRs.
[0160] Aspect 10: The method of Aspect 9, wherein the one or more transmission types are a single transmission type, and: wherein the single PHR is a type 1 PHR in accordance with the one or more transmission types being the single transmission type, wherein the single PHR is a type 3 PHR in accordance with the one or more transmission types being the single transmission type, wherein selecting the single PHR includes selecting the type 1 PHR or the type 3 PHR in accordance with a radio resource control (RRC) configuration, or wherein the plurality of candidate PHRs includes a plurality of candidate type 1 PHRs, and selecting the single PHR includes selecting the single PHR from among the plurality of candidate type 1 PHRs in accordance with a first physical uplink shared channel (PUSCH) repetition associated with the single PHR or a transmission configuration indicator (TCI) state associated with the single PHR.
[0161] Aspect 11: The method of Aspect 6, wherein transmitting the single PHR comprises: selecting the single PHR from among a plurality of candidate type 1 PHRs in accordance with the uplink transmission mode.
[0162] Aspect 12: The method of any of Aspects 1-11, wherein the UE is associated with a two-PHR mode.
[0163] Aspect 13: The method of any of Aspects 1-12, wherein transmitting the one or more PHRs includes: selecting the one or more PHRs in accordance with one or more of a prioritization of actual transmission types over reference transmission types or a prioritization of type 1 PHRs over type 3 PHRs.
[0164] Aspect 14: The method of any of Aspects 1-13, wherein transmitting the one or more PHRs includes: selecting the one or more PHRs in accordance with one or more of a prioritization of actual transmission types over reference transmission types or a prioritization of type 3 PHRs over type 1 PHRs.
[0165] Aspect 15: The method of any of Aspects 1-14, wherein transmitting the one or more PHRs includes: selecting the one or more PHRs from among a plurality of candidate type 1 PHRs in accordance with the uplink transmission mode.
[0166] Aspect 16: The method of any of Aspects 1-15, wherein the UE is associated with a three-PHR mode.
[0167] Aspect 17: The method of any of Aspects 1-16, wherein the one or more PHRs are associated with a component carrier.
[0168] Aspect 18: The method of any of Aspects 1-17, wherein transmitting the one or more PHRs includes transmitting a medium access control (MAC) control element (MAC-CE) that includes the one or more PHRs.
[0169] Aspect 19: An apparatus for wireless communication at a device, the apparatus comprising one or more processors; one or more memories coupled with the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method of one or more of Aspects 1-18.
[0170] Aspect 20: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors configured to cause the device to perform the method of one or more of Aspects 1-18.
[0171] Aspect 21: An apparatus for wireless communication, the apparatus comprising at least one means for performing the method of one or more of Aspects 1-18.
[0172] Aspect 22: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by one or more processors to perform the method of one or more of Aspects 1-18.
[0173] Aspect 23: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 1-18.
[0174] Aspect 24: A device for wireless communication, the device comprising a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the device to perform the method of one or more of Aspects 1-18.
[0175] Aspect 25: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to cause the device to perform the method of one or more of Aspects 1-18.
[0176] The foregoing disclosure provides illustration and description but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects. No element, act, or instruction described herein should be construed as critical or essential unless explicitly described as such.
[0177] It will be apparent that systems or methods described herein may be implemented in different forms of hardware or a combination of hardware and software. The actual specialized control hardware or software used to implement these systems or methods is not limiting of the aspects. Thus, the operation and behavior of the systems or methods are described herein without reference to specific software code, because those skilled in the art will understand that software and hardware can be designed to implement the systems or methods based, at least in part, on the description herein. A component being configured to perform a function means that the component has a capability to perform the function, and does not require the function to be actually performed by the component, unless noted otherwise.
[0178] As used herein, the articles “a” and “an” are intended to refer to one or more items and may be used interchangeably with “one or more” or “at least one. ” Further, as used herein, the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more. ” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items and may be used interchangeably with “one or more. ” Where only one item is intended, the phrase “only one” or “asingle one” or similar language is used. Also, as used herein, the terms “has, ” “have, ” “having, ” “comprise, ” “comprising, ” “include” and “including, ” and derivatives thereof or similar terms are intended to be open-ended terms that do not limit an element that they modify (for example, an element “having” A may also have B) . Also, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and / or, ” unless explicitly stated otherwise (for example, if used in combination with “either” or “only one of” ) . As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a + b, a + c, b + c, and a + b + c, as well as any combination with multiples of the same element (for example, a + a, a + a + a, a + a + b, a + a + c, a + b + b, a + c + c, b + b, b + b + b, b + b + c, c + c, and c + c + c, or any other ordering of a, b, and c) .
[0179] As used herein, the term “determine” or “determining” encompasses a wide variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, estimating, investigating, looking up (such as via looking up in a table, a database, or another data structure) , searching, inferring, ascertaining, and / or measuring, among other possibilities. Also, “determining” can include receiving (such as receiving information) , accessing (such as accessing data stored in memory) or transmitting (such as transmitting information) , among other possibilities. Additionally, “determining” can include resolving, selecting, obtaining, choosing, establishing, and / or other such similar actions.
[0180] As used herein, the phrase “based on” is intended to mean “based at least in part on” or “based on or otherwise in association with” unless explicitly stated otherwise. As used herein, “satisfying a threshold” may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, or not equal to the threshold, among other examples.
[0181] Even though particular combinations of features are recited in the claims or disclosed in the specification, these combinations are not intended to limit the scope of all aspects described herein. Many of these features may be combined in ways not specifically recited in the claims or disclosed in the specification. The disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set.
Claims
1.An apparatus for wireless communication at a user equipment (UE) , comprising:one or more memories storing processor-executable code; andone or more processors coupled with the one or more memories, at least one processor of the one or more processors configured to cause the UE to:receive an indication of an uplink transmission mode associated with at least one uplink network node and at least one downlink network node; andtransmit, in accordance with the uplink transmission mode, one or more power headroom reports (PHRs) associated with one or more of the at least one uplink network node or the at least one downlink network node.2.The apparatus of claim 1, wherein the indication of the uplink transmission mode is a radio resource control (RRC) configuration or a dynamic indication.3.The apparatus of claim 1, wherein at least one transmission configuration indicator (TCI) state corresponding to the at least one uplink network node is associated with a pathloss offset.4.The apparatus of claim 1, wherein the UE is associated with a single-PHR mode, and wherein the one or more PHRs are a single PHR.5.The apparatus of claim 4, wherein the at least one processor, to cause the UE to transmit the single PHR, is configured to cause the UE to:select a candidate type 1 PHR from among a plurality of candidate type 1 PHRs in accordance with a first physical uplink shared channel (PUSCH) repetition associated with the candidate type 1 PHR or a transmission configuration indicator (TCI) state associated with the candidate type 1 PHR, andselect the single PHR from among the candidate type 1 PHR and a candidate type 3 PHR in accordance with a transmission type of the candidate type 1 PHR and a transmission type of the candidate type 3 PHR.6.The apparatus of claim 5, wherein the transmission type of the candidate type 1 PHR and the transmission type of the candidate type 3 PHR are a same transmission type, and:wherein the single PHR is the candidate type 1 PHR in accordance with the transmission type of the candidate type 1 PHR and the transmission type of the candidate type 3 PHR being the same transmission type,wherein the single PHR is the candidate type 3 PHR in accordance with the transmission type of the candidate type 1 PHR and the transmission type of the candidate type 3 PHR being the same transmission type, orwherein the at least one processor, to cause the UE to select the single PHR, is configured to cause the UE to select the single PHR in accordance with a radio resource control (RRC) configuration.7.The apparatus of claim 4, wherein the at least one processor, to cause the UE to transmit the single PHR, is configured to cause the UE to:select the single PHR from among a plurality of candidate PHRs in accordance with one or more transmission types of the plurality of candidate PHRs.8.The apparatus of claim 7, wherein the one or more transmission types are a single transmission type, and:wherein the single PHR is a type 1 PHR in accordance with the one or more transmission types being the single transmission type,wherein the single PHR is a type 3 PHR in accordance with the one or more transmission types being the single transmission type,wherein the at least one processor, to cause the UE to select the single PHR, is configured to cause the UE to select the type 1 PHR or the type 3 PHR in accordance with a radio resource control (RRC) configuration, orwherein the plurality of candidate PHRs includes a plurality of candidate type 1 PHRs, and the at least one processor, to cause the UE to select the single PHR, is configured to cause the UE to select the single PHR from among the plurality of candidate type 1 PHRs in accordance with a first physical uplink shared channel (PUSCH) repetition associated with the single PHR or a transmission configuration indicator (TCI) state associated with the single PHR.9.The apparatus of claim 4, wherein the at least one processor, to cause the UE to transmit the single PHR, is configured to cause the UE to:select the single PHR from among a plurality of candidate type 1 PHRs in accordance with the uplink transmission mode.10.A method of wireless communication performed at a user equipment (UE) , comprising:receiving an indication of an uplink transmission mode associated with at least one uplink network node and at least one downlink network node; andtransmitting, in accordance with the uplink transmission mode, one or more power headroom reports (PHRs) associated with one or more of the at least one uplink network node or the at least one downlink network node.11.The method of claim 10, wherein the UE is associated with a two-PHR mode.12.The method of claim 10, wherein transmitting the one or more PHRs includes:selecting the one or more PHRs in accordance with one or more of a prioritization of actual transmission types over reference transmission types or a prioritization of type 1 PHRs over type 3 PHRs.13.The method of claim 10, wherein transmitting the one or more PHRs includes:selecting the one or more PHRs in accordance with one or more of a prioritization of actual transmission types over reference transmission types or a prioritization of type 3 PHRs over type 1 PHRs.14.The method of claim 10, wherein transmitting the one or more PHRs includes:selecting the one or more PHRs from among a plurality of candidate type 1 PHRs in accordance with the uplink transmission mode.15.The method of claim 10, wherein the UE is associated with a three-PHR mode.16.The method of claim 10, wherein the one or more PHRs are associated with a component carrier.17.The method of claim 10, wherein transmitting the one or more PHRs includes transmitting a medium access control (MAC) control element (MAC-CE) that includes the one or more PHRs.18.An apparatus for wireless communication, comprising:means for receiving an indication of an uplink transmission mode associated with at least one uplink network node and at least one downlink network node; andmeans for transmitting, in accordance with the uplink transmission mode, one or more power headroom reports (PHRs) associated with one or more of the at least one uplink network node or the at least one downlink network node.19.The apparatus of claim 18, wherein the indication of the uplink transmission mode is a radio resource control (RRC) configuration or a dynamic indication.20.The apparatus of claim 18, wherein at least one transmission configuration indicator (TCI) state corresponding to the at least one uplink network node is associated with a pathloss offset.