Uplink power control for uplink-only network node
The UE receives a beam indication DCI message to determine uplink power control parameters, addressing the challenge of uplink-only network nodes lacking downlink signals, enhancing uplink coverage and capacity.
Patent Information
- Application Number
- PCT/CN2024/078242
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-02-23
- Publication Date
- 2025-08-28
AI Technical Summary
Uplink power control in wireless networks with uplink-only network nodes is challenging due to the absence of downlink pathloss reference signals, which are typically used for calculating uplink power control.
A user equipment (UE) receives a beam indication downlink control information message from a network node indicating an uplink transmission configuration indication state and a power control parameter, allowing it to transmit uplink communications using the indicated TCI state and associated transmit power.
Enables effective uplink power control in deployments with uplink-only network nodes, improving uplink coverage and capacity while reducing pathloss and signaling overhead.
Smart Images

Figure CN2024078242_28082025_PF_FP_ABST
Abstract
Description
UPLINK POWER CONTROL FOR UPLINK-ONLY NETWORK NODE
[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 uplink power control for an uplink-only network node.BACKGROUND
[0003] Wireless communication systems are widely deployed to provide various services that may include carrying voice, text, messaging, video, data, and / or other traffic. The services may include unicast, multicast, and / or broadcast services, among other examples. Typical wireless communication systems may employ multiple-access radio access technologies (RATs) capable of supporting communication with multiple users by sharing 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.
[0004] The above multiple-access RATs have been adopted in various telecommunication standards to provide common protocols that enable different wireless communication devices to communicate on a municipal, national, regional, or global level. 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 mobile broadband evolutions beyond NR) may be designed to better support Internet of things (IoT) and reduced capability device deployments, industrial connectivity, millimeter wave (mmWave) expansion, licensed and unlicensed spectrum access, non-terrestrial network (NTN) deployment, sidelink and other device-to-device direct communication technologies (for example, cellular vehicle-to-everything (CV2X) communication) , massive multiple-input multiple-output (MIMO) , disaggregated network architectures and network topology expansions, multiple-subscriber implementations, high-precision positioning, and / or radio frequency (RF) sensing, among other examples. As the demand for mobile broadband access continues to increase, further improvements in NR may be implemented, and other radio access technologies such as 6G may be introduced, to further advance mobile broadband evolution.
[0005] In some cases, to improve uplink coverage and / or uplink capacity, a wireless network may include an uplink dense deployment in one or more coverage regions. More particularly, as described herein, an uplink dense deployment may provide asymmetric downlink and uplink densification, where a quantity of uplink-only network nodes exceeds a quantity of network nodes that support downlink communication or downlink and uplink communication. For example, in an uplink dense deployment, uplink signals and / or uplink channels that are transmitted by a user equipment (UE) are received by one or more uplink-only network nodes (or uplink receive (Rx) points) , and downlink signals and / or downlink channels are transmitted from a different network node (for example, a macro node, a central node, a serving cell, a serving network node, or another suitable network node that supports downlink communication or downlink and uplink communication) . In this way, an uplink dense deployment may reduce an uplink pathloss, which may improve performance in a wireless network (for example, in cases where uplink coverage is a performance bottleneck) , and / or may reduce deployment costs and / or deployment complexity because the uplink-only network nodes do not transmit any downlink signals or downlink channels. Instead, the uplink-only network nodes only need to receive the uplink signals and / or uplink channels and then forward the uplink signals and / or uplink channels to a macro node, central node, serving cell, or serving network node via a backhaul with or without additional processing.
[0006] However, one challenge that may arise in an uplink dense deployment relates to uplink power control. For example, uplink power control in a wireless network is typically calculated in accordance with various parameters, including a pathloss that is determined from a downlink pathloss reference signal (PLRS) . However, because an uplink-only network node does not transmit any downlink signals or downlink channels, there is no downlink PLRS transmitted from an uplink-only network node that a UE can measure to determine a pathloss for uplink power control.SUMMARY
[0007] Some aspects described herein relate to a user equipment (UE) for wireless communication. The UE may include one or more memories storing processor readable code and one or more processors coupled with the one or more memories. The one or more processors may be individually or collectively operable to cause the user equipment to receive, from a first network node, a beam indication downlink control information (DCI) message indicating an uplink transmission configuration indication (TCI) state and a power control parameter associated with the uplink TCI state. The one or more processors may be individually or collectively operable to cause the user equipment to transmit, to the first network node or a second network node, an uplink communication using the uplink TCI state and a transmit power associated with the power control parameter.
[0008] Some aspects described herein relate to a method of wireless communication performed by a UE. The method may include receiving, from a first network node, a beam indication DCI message indicating an uplink TCI state and a power control parameter associated with the uplink TCI state. The method may include transmitting, to the first network node or a second network node, an uplink communication using the uplink TCI state and a transmit power associated with the power control parameter.
[0009] Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a UE. The set of instructions, when executed by one or more processors of the UE, may cause the UE to receive, from a first network node, a beam indication DCI message indicating an uplink TCI state and a power control parameter associated with the uplink TCI state. The set of instructions, when executed by one or more processors of the UE, may cause the UE to transmit, to the first network node or a second network node, an uplink communication using the uplink TCI state and a transmit power associated with the power control parameter.
[0010] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving, from a first network node, a beam indication DCI message indicating an uplink TCI state and a power control parameter associated with the uplink TCI state. The apparatus may include means for transmitting, to the first network node or a second network node, an uplink communication using the uplink TCI state and a transmit power associated with the power control parameter.
[0011] 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, the specification and accompanying drawings.
[0012] 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
[0013] 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.
[0014] Figure 1 is a diagram illustrating an example of a wireless network in accordance with the present disclosure.
[0015] Figure 2 is a diagram illustrating an example network node in communication with a user equipment (UE) in a wireless network in accordance with the present disclosure.
[0016] Figure 3 is a diagram illustrating an example disaggregated base station architecture in accordance with the present disclosure.
[0017] Figure 4 is a diagram illustrating an example of using beams for access link communications in accordance with the present disclosure.
[0018] Figures 5A-5B are diagrams illustrating examples of a transmission configuration indication (TCI) state indication in a unified TCI framework in accordance with the present disclosure.
[0019] Figures 6A-6E are diagrams illustrating examples associated with uplink power control for an uplink-only network node in accordance with the present disclosure.
[0020] Figure 7 is a flowchart illustrating an example process performed, for example, by a UE in accordance with the present disclosure.
[0021] Figure 8 is a diagram of an example apparatus for wireless communication 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 and 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] Various aspects relate generally to techniques to indicate a pathloss that a user equipment (UE) can use to calculate an uplink transmit power when transmitting an uplink communication to an uplink-only network node. Some aspects more specifically relate to a network node (for example, a macro node, a central node, a serving cell, a serving network node, or another suitable network node that supports downlink communication or downlink and uplink communication) transmitting, to the UE, a beam indication downlink control information (DCI) message that indicates an uplink transmission configuration indication (TCI) state to be used to transmit an uplink communication to an uplink-only network node. In some aspects, the beam indication DCI message may include one or more fields that indicate a power control parameter associated with the uplink TCI state. For example, in some aspects, the power control parameter may include a pathloss offset to apply to the uplink TCI state indicated in the beam indication DCI message, a pathloss scaling factor to apply to the uplink TCI state indicated in the beam indication DCI message, or a transmit power control (TPC) command that is applied to a closed-loop index associated with the uplink TCI state indicated in the beam indication DCI message. In some aspects, when the power control parameter is a pathloss offset or a pathloss scaling factor, the power control parameter may be applied with respect to a downlink pathloss that the UE may measure according to a pathloss reference signal (PLRS) associated with the uplink TCI state indicated in the beam indication DCI message or according to a reference PLRS (e.g., a PLRS that is transmitted by a network node that supports downlink communication or downlink and uplink communication) . Alternatively, the UE may derive an initial or reference uplink pathloss according to a pathloss offset that a TCI state activation medium access control (MAC) control element (MAC-CE) indicates relative to a downlink pathloss, and the pathloss offset indicated in the beam indication DCI may be applied with respect to the initial or reference uplink pathloss. In some aspects, when the beam indication DCI message indicates a TPC command, the TPC command may be used to compensate for a remaining pathloss offset after a pathloss scaling factor is applied and / or for closed-loop power control for one or more uplink signals and / or uplink channels that are transmitted using the indicated uplink TCI state.
[0025] 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 for uplink power control in a deployment that includes one or more uplink-only network nodes and / or other suitable network nodes that do not transmit a downlink PLRS to a UE. For example, the beam indication DCI message may indicate a power control parameter that can be used to determine a pathloss associated with an uplink-only network node in accordance with a pathloss value that the UE measures from a PLRS transmitted by a network node that supports downlink communication or downlink and uplink communication. Furthermore, in some examples, the beam indication DCI may indicate the power control parameter in one or more unused fields to reduce a signaling overhead associated with indicating the power control parameter. Accordingly, in some examples, the described techniques can be used to enable uplink power control in an uplink dense deployment that is used to improve uplink coverage, improve uplink capacity, and / or reduce an uplink pathloss.
[0026] Multiple-access radio access technologies (RATs) have been adopted in various telecommunication standards to provide common protocols that enable wireless communication devices to communicate on a 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 supports various technologies and use cases including enhanced mobile broadband (eMBB) , ultra-reliable low-latency communication (URLLC) , massive machine-type communication (mMTC) , millimeter wave (mmWave) technology, beamforming, network slicing, edge computing, Internet of Things (IoT) connectivity and management, and network function virtualization (NFV) .
[0027] As the demand for broadband access increases and as technologies supported by wireless communication networks evolve, further technological improvements may be adopted in or implemented for 5G NR or future RATs, such as 6G, to further advance the evolution of wireless communication for a wide variety of existing and new use cases and applications. Such technological improvements may be associated with new frequency band expansion, licensed and unlicensed spectrum access, overlapping spectrum use, small cell deployments, non-terrestrial network (NTN) deployments, disaggregated network architectures and network topology expansion, device aggregation, advanced duplex communication, sidelink and other device-to-device direct communication, IoT (including passive or ambient IoT) networks, reduced capability (RedCap) UE functionality, industrial connectivity, multiple-subscriber implementations, high-precision positioning, radio frequency (RF) sensing, and / or artificial intelligence or machine learning (AI / ML) , among other examples. These technological improvements may support use cases such as 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. The methods, operations, apparatuses, and techniques described herein may enable one or more of the foregoing technologies and / or support one or more of the foregoing use cases.
[0028] 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, shown as a network node (NN) 110a, a network node 110b, a network node 110c, and a network node 110d. The network nodes 110 may support communications with multiple UEs 120, shown as a UE 120a, a UE 120b, a UE 120c, a UE 120d, and a UE 120e.
[0029] 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 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 ranges. Examples of RATs include a 4G RAT, a 5G / NR RAT, and / or a 6G RAT, among other examples. 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 one another.
[0030] 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 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 frequencies that are included in mid-band frequencies, that are within FR2, FR4, FR4-a or FR4-1, or FR5, and / or that are within the EHF band. Higher frequency bands may extend 5G NR operation, 6G operation, and / or other RATs beyond 52.6 GHz. For example, each of FR4a, FR4-1, FR4, and FR5 falls within the EHF band. In some examples, the wireless communication network 100 may implement dynamic spectrum sharing (DSS) , in which multiple RATs (for example, 4G / LTE and 5G / NR) are implemented with dynamic bandwidth allocation (for example, based on user demand) in a single frequency band. It is contemplated that the frequencies included in these operating bands (for example, FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) may be modified, and techniques described herein may be applicable to those modified frequency ranges.
[0031] A network node 110 may include one or more devices, components, or systems that enable communication between a UE 120 and one or more devices, components, or systems of the wireless communication network 100. 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, an eNB, a gNB, an access point (AP) , a transmission reception point (TRP) , a mobility element, a core, 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) .
[0032] 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 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 node (for example, 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 uses a full radio protocol stack to enable or facilitate communication between a UE 120 and a core network of the wireless communication network 100.
[0033] Alternatively, and as also shown, a network node 110 may be a disaggregated network node (sometimes referred to as a disaggregated base station) , meaning that the network node 110 may implement 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. For example, a disaggregated network node may have a disaggregated architecture. 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 base station functionality into multiple units that can be individually deployed.
[0034] 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 / or one or more radio units (RUs) . A CU may host one or more higher layer control functions, such as radio resource control (RRC) functions, packet data convergence protocol (PDCP) functions, and / or service data adaptation protocol (SDAP) functions, among other examples. A DU may host one or more of a radio link control (RLC) layer, a 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 one or more lower PHY layer functions, such as a fast Fourier transform (FFT) , an inverse FFT (iFFT) , beamforming, physical random access channel (PRACH) extraction and filtering, and / or scheduling of resources for one or more UEs 120, among other examples. An RU may host 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 functional split. In such an architecture, each RU can be operated to handle over the air (OTA) communication with one or more UEs 120.
[0035] In some aspects, a single network node 110 may include a combination of one or more CUs, one or more DUs, and / or one or more RUs. Additionally or alternatively, a network node 110 may include one or more Near-Real Time (Near-RT) RAN Intelligent Controllers (RICs) and / or one or more Non-Real Time (Non-RT) RICs. 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. A virtual unit may be implemented as a virtual network function, such as associated with a cloud deployment.
[0036] Some network nodes 110 (for example, a base station, an RU, or a TRP) may provide communication coverage for a particular geographic area. In the 3GPP, 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 multiple (for example, three) cells. 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 service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs 120 with 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) ) . A network node 110 for a macro cell may be referred to as a macro network node. A network node 110 for a pico cell may be referred to as a pico network node. A network node 110 for a femto cell may be referred to as a femto network node or an in-home network node. 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 base station, an unmanned aerial vehicle, or an NTN network node) .
[0037] 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. In the example shown in Figure 1, the network node 110a may be a macro network node for a macro cell 130a, the network node 110b may be a pico network node for a pico cell 130b, and the network node 110c may be a femto network node for a femto cell 130c. Various different types of network nodes 110 may generally transmit at different power levels, serve different coverage areas, and / or have different impacts on interference in the wireless communication network 100 than other types of network nodes 110. For example, macro network nodes may have a high transmit power level (for example, 5 to 40 watts) , whereas pico network nodes, femto network nodes, and relay network nodes may have lower transmit power levels (for example, 0.1 to 2 watts) .
[0038] 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 channels may include one or more control channels and one or more data channels. A downlink control channel may be used to transmit DCI (for example, scheduling information, reference signals, and / or configuration information) from a network node 110 to a UE 120. 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 one or more physical downlink control channels (PDCCHs) , and downlink data channels may include one or more physical downlink shared channels (PDSCHs) . Uplink channels may similarly include one or more control channels and one or more data channels. An uplink control channel may be used to transmit uplink control information (UCI) (for example, reference signals and / or feedback corresponding to one or more downlink transmissions) 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 one or more physical uplink control channels (PUCCHs) , and uplink data channels may include one or more physical uplink shared channels (PUSCHs) . The downlink and the uplink may each include a set of resources on which the network node 110 and the UE 120 may communicate.
[0039] Downlink and uplink resources may include time domain resources (frames, subframes, slots, and / or symbols) , frequency domain resources (frequency bands, component carriers, subcarriers, resource blocks, and / or resource elements) , and / or spatial domain resources (particular transmit directions and / or beam parameters) . Frequency domain resources of some bands may be subdivided into bandwidth parts (BWPs) . A BWP may be a continuous block of frequency domain resources (for example, a continuous block of resource blocks) that are allocated for one or more UEs 120. A UE 120 may be configured with both an uplink BWP and a downlink BWP (where the uplink BWP and the downlink BWP may be the same BWP or different BWPs) . A BWP may be dynamically configured (for example, by a network node 110 transmitting a DCI configuration to the one or more UEs 120) and / or reconfigured, which means that a BWP can be adjusted in real-time (or near-real-time) based on changing network conditions in the wireless communication network 100 and / or based on the specific requirements of the one or more UEs 120. This 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) , leaving more frequency domain resources to be spread across multiple UEs 120. Thus, BWPs may also assist in the implementation of lower-capability UEs 120 by facilitating the configuration of smaller bandwidths for communication by such UEs 120.
[0040] As described above, in some aspects, the wireless communication network 100 may be, may include, or may be included in, an IAB network. In an IAB network, at least one network node 110 is an anchor network node that communicates with a core network. An anchor network node 110 may also be referred to as an IAB donor (or “IAB-donor” ) . The anchor network node 110 may connect to the core network via a wired backhaul link. For example, an Ng interface of the anchor network node 110 may terminate at the core network. Additionally or alternatively, an anchor network node 110 may connect to one or more devices of the core network that provide a core access and mobility management function (AMF) . An IAB network also generally includes multiple non-anchor network nodes 110, which may also be referred to as relay network nodes or simply as IAB nodes (or “IAB-nodes” ) . Each non-anchor network node 110 may communicate directly with the anchor network node 110 via a wireless backhaul link to access the core network, or may communicate indirectly with the anchor network node 110 via one or more other non-anchor network nodes 110 and associated wireless backhaul links that form a backhaul path to the core network. Some anchor network node 110 or other non-anchor network node 110 may also communicate directly with one or more UEs 120 via wireless access links that carry access traffic. In some examples, network resources for wireless communication (such as time resources, frequency resources, and / or spatial resources) may be shared between access links and backhaul links.
[0041] In some examples, any network node 110 that relays communications may be referred to as a relay network node, a relay station, or simply as a relay. A relay may receive a transmission of a communication from an upstream station (for example, another network node 110 or a UE 120) and transmit the communication to a downstream station (for example, a UE 120 or another network node 110) . In this case, the wireless communication network 100 may include or be referred to as a “multi-hop network. ” In the example shown in Figure 1, the network node 110d (for example, a relay network node) may communicate with the network node 110a (for example, a macro network node) and the UE 120d in order to facilitate communication between the network node 110a and the UE 120d. Additionally or alternatively, a UE 120 may be or may operate as a relay station that can relay transmissions to or from other UEs 120. A UE 120 that relays communications may be referred to as a UE relay or a relay UE, among other examples.
[0042] The UEs 120 may be physically dispersed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile. A UE 120 may be, may include, or may be included in an access terminal, another 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 gaming device, 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, and / or smart jewelry, such as a smart ring or a smart bracelet) , an entertainment device (for example, a music device, a video device, and / 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.
[0043] A UE 120 and / or a network node 110 may include one or more chips, system-on-chips (SoCs) , chipsets, packages, or devices that individually or collectively constitute or comprise a processing system. The processing system 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) and / or digital signal processors (DSPs) ) , processing blocks, application-specific integrated circuits (ASIC) , programmable logic devices (PLDs) (such as field programmable gate arrays (FPGAs) ) , or other discrete gate or transistor logic or circuitry (all of which may be generally referred to herein individually as “processors” or collectively as “the processor” or “the processor circuitry” ) . One or more of the 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, or may include the group of processors all being configured or configurable to perform the set of functions.
[0044] The processing system may further include memory circuitry in the form of one or more memory devices, memory blocks, memory elements or other discrete gate or transistor logic or circuitry, each of which may include tangible storage media such as random-access memory (RAM) or read-only memory (ROM) , or combinations thereof (all of which may be generally referred to herein individually as “memories” 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 (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 preconfigured to perform various functions or operations described herein without requiring configuration by software. The processing system may further include or be coupled with one or more modems (such as a Wi-Fi (for example, IEEE compliant) modem or a cellular (for example, 3GPP 4G LTE, 5G, or 6G compliant) modem) . In some implementations, one or more processors of the processing system include or implement one or more of the modems. The processing system may further 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 implementations, one or more processors of the processing system include or implement one or more of the radios, RF chains or transceivers. The UE 120 may include or may be included in a housing that houses components associated with the UE 120 including the processing system.
[0045] Some UEs 120 may be considered machine-type communication (MTC) UEs, evolved or enhanced machine-type communication (eMTC) , UEs, further enhanced eMTC (feMTC) UEs, or enhanced feMTC (efeMTC) UEs, or further evolutions thereof, all of which may be simply referred to as “MTC UEs” . An MTC UE may be, may include, or may be included in or coupled with a robot, an uncrewed aerial vehicle, a remote device, a sensor, a meter, a monitor, and / or a location tag. Some UEs 120 may be considered IoT devices and / or may be implemented as NB-IoT (narrowband IoT) devices. An IoT UE or NB-IoT device may be, may include, or may be included in or coupled with an industrial machine, an appliance, a refrigerator, a doorbell camera device, a home automation device, and / or a light fixture, among other examples. Some UEs 120 may be considered Customer Premises Equipment, which may include telecommunications devices that are installed at a customer location (such as a home or office) to enable access to a service provider's network (such as included in or in communication with the wireless communication network 100) .
[0046] 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, enhanced mobile broadband (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 UEs 120 of the first category and UEs 120 of the second capability) . A UE 120 of the third category may be referred to as a reduced capacity 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, and / 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, and / or smart city deployments, among other examples.
[0047] In some examples, two or more UEs 120 (for example, shown as UE 120a and UE 120e) may communicate directly with one another using sidelink communications (for example, without communicating by way of a network node 110 as an intermediary) . As an example, the UE 120a may directly transmit data, control information, or other signaling as a sidelink communication to the UE 120e. This is in contrast to, for example, the UE 120a first transmitting data in an UL communication to a network node 110, which then transmits the data to the UE 120e in a DL communication. In various examples, the UEs 120 may transmit and receive sidelink communications using peer-to-peer (P2P) communication protocols, device-to-device (D2D) communication protocols, vehicle-to-everything (V2X) communication protocols (which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, and / or vehicle-to-pedestrian (V2P) protocols) , and / or mesh network communication protocols. In some deployments and configurations, a network node 110 may schedule and / or allocate resources for sidelink communications between UEs 120 in the wireless communication network 100. In some other deployments and configurations, a UE 120 (instead of a network node 110) may perform, or collaborate or negotiate with one or more other UEs to perform, scheduling operations, resource selection operations, and / or other operations for sidelink communications.
[0048] In various examples, some of the network nodes 110 and the UEs 120 of the wireless communication network 100 may be configured for full-duplex operation in addition to half-duplex operation. A network node 110 or a UE 120 operating in a half-duplex mode may perform only one of transmission or reception during particular time resources, such as during particular slots, symbols, or other time periods. Half-duplex operation may involve time-division duplexing (TDD) , in which DL transmissions of the network node 110 and UL transmissions of the UE 120 do not occur in the same time resources (that is, the transmissions do not overlap in time) . In contrast, a network node 110 or a UE 120 operating in a full-duplex mode can transmit and receive communications concurrently (for example, in the same time resources) . By operating in a full-duplex mode, network nodes 110 and / or UEs 120 may generally increase the capacity of the network and the radio access link. In some examples, full-duplex operation may involve frequency-division duplexing (FDD) , in which DL transmissions of the network node 110 are performed in a first frequency band or on a first component carrier and transmissions of the UE 120 are performed in a second frequency band or on a second component carrier different than the first frequency band or the first component carrier, respectively. In some examples, full-duplex operation may be enabled for a UE 120 but not for a network node 110. For example, a UE 120 may simultaneously transmit an UL transmission to a first network node 110 and receive a DL transmission from a second network node 110 in the same time resources. In some other examples, full-duplex operation may be enabled for a network node 110 but not for a UE 120. For example, a network node 110 may simultaneously transmit a DL transmission to a first UE 120 and receive an UL transmission from a second UE 120 in the same time resources. In some other examples, full-duplex operation may be enabled for both a network node 110 and a UE 120.
[0049] In some examples, the UEs 120 and the network nodes 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. MIMO may be implemented using various spatial processing or spatial multiplexing operations. In some examples, MIMO may support simultaneous transmission to multiple receivers, referred to as multi-user MIMO (MU-MIMO) . Some RATs may employ advanced MIMO techniques, such as multi-TRP (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) .
[0050] The network node 110 may provide the UE 120 with a configuration of TCI states that indicate or correspond to beams that may be used by the UE 120, such as for receiving one or more communications via a physical channel. For example, the network node 110 may indicate (for example, using DCI) an activated TCI state to the UE 120, which the UE 120 may use to generate a beam for receiving one or more communications via the physical channel. A beam indication may be, or may include, a TCI state information element, a beam identifier (ID) , spatial relation information, a TCI state ID, a closed loop index, a panel ID, a TRP ID, and / or a sounding reference signal (SRS) set ID, among other examples. A TCI state information element (sometimes referred to as a TCI state herein) may indicate particular information associated with a beam. For example, the TCI state information element may indicate a TCI state identification (for example, a tci-StateID) , a quasi-co-location (QCL) type (for example, a qcl-Type1, qcl-Type2, qcl-TypeA, qcl-TypeB, qcl-TypeC, or a qcl-TypeD, among other examples) , a cell identification (for example, a ServCellIndex) , a bandwidth part identification (bwp-Id) , or a reference signal identification, such as a CSI-RS identification (for example, an NZP-CSI-RS-ResourceId or an SSB-Index, among other examples) . Spatial relation information may similarly indicate information associated with an uplink beam. The beam indication may be a joint or separate DL / UL beam indication in a unified TCI framework. In a unified TCI framework, a network node 110 may support common TCI state ID update and activation, which may provide common QCL and / or common UL transmission spatial filters across a set of configured component carriers. This type of beam indication may apply to intra-band carrier aggregation (CA) , as well as to joint DL / UL and separate DL / UL beam indications. The common TCI state ID may imply that one reference signal determined according to the TCI state (s) indicated by a common TCI state ID is used to provide QCL Type-D indication and to determine UL transmission spatial filters across the set of configured CCs.
[0051] In some examples, the network may support a layer 1 (L1) -based beam indication using at least UE-specific (unicast) DCI to indicate joint or separate DL / UL beam indications that may be selected from active TCI states. In some examples, DCI formats 1_1 and / or 1_2 may be used for beam indication. Accordingly, as described herein, the term “beam indication DCI” or “beam indication DCI message” may refer to a DCI message having DCI format 1_1 or DCI format 1_2. In some examples, a beam indication DCI message may schedule a PDSCH, or may not include any PDSCH scheduling. The network node 110 may support a mechanism for the UE 120 to acknowledge successful decoding of a beam indication DCI message. For example, in cases where the beam indication DCI schedules a PDSCH, an acknowledgment / negative acknowledgment of the PDSCH scheduled by the beam indication DCI may also be used as an acknowledgement for the DCI. Alternatively, in cases where the beam indication DCI does not schedule a PDSCH, the UE may transmit a separate PUCCH that includes hybrid automatic repeat request (HARQ) acknowledgement (HARQ-ACK) feedback for the beam indication DCI.
[0052] In some aspects, the UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may receive, from a first network node 110, a beam indication DCI message indicating an uplink TCI state and a power control parameter associated with the uplink TCI state; and transmit, to the first network node or a second network node 110, an uplink communication using the uplink TCI state and a transmit power associated with the power control parameter. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.
[0053] Figure 2 is a diagram illustrating an example network node 110 in communication with an example UE 120 in a wireless network in accordance with the present disclosure.
[0054] As shown in Figure 2, the network node 110 may include a data source 212, a transmit processor 214, a transmit (TX) MIMO processor 216, a set of modems 232 (shown as 232a through 232t, where t ≥ 1) , a set of antennas 234 (shown as 234a through 234v, where v ≥ 1) , a MIMO detector 236, a receive processor 238, a data sink 239, a controller / processor 240, a memory 242, a communication unit 244, a scheduler 246, and / or a communication manager, among other examples. In some configurations, one or a combination of the antenna (s) 234, the modem (s) 232, the MIMO detector 236, the receive processor 238, the transmit processor 214, and / or the TX MIMO processor 216 may be included in a transceiver of the network node 110. The transceiver may be under control of and used by one or more processors, such as the controller / processor 240, and in some aspects in conjunction with processor-readable code stored in the memory 242, to perform aspects of the methods, processes, and / or operations described herein. In some aspects, the network node 110 may include one or more interfaces, communication components, and / or other components that facilitate communication with the UE 120 or another network node.
[0055] The terms “processor, ” “controller, ” or “controller / processor” may refer to one or more controllers and / or one or more processors. For example, reference to “a / the processor, ” “a / the controller / processor, ” or the like (in the singular) should be understood to refer to any one or more of the processors described in connection with Figure 2, such as a single processor or a combination of multiple different processors. Reference to “one or more processors” should be understood to refer to any one or more of the processors described in connection with Figure 2. For example, one or more processors of the network node 110 may include transmit processor 214, TX MIMO processor 216, MIMO detector 236, receive processor 238, and / or controller / processor 240. Similarly, one or more processors of the UE 120 may include MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, and / or controller / processor 280.
[0056] In some aspects, a single processor may perform all of the operations described as being performed by the one or more processors. In some aspects, a first set of (one or more) processors of the one or more processors may perform a first operation described as being performed by the one or more processors, and a second set of (one or more) processors of the one or more processors may perform a second operation described as being performed by the one or more processors. The first set of processors and the second set of processors may be the same set of processors or may be different sets of processors. Reference to “one or more memories” should be understood to refer to any one or more memories of a corresponding device, such as the memory described in connection with Figure 2. For example, operation described as being performed by one or more memories can be performed by the same subset of the one or more memories or different subsets of the one or more memories.
[0057] For downlink communication from the network node 110 to the UE 120, the transmit processor 214 may receive data ( “downlink data” ) intended for the UE 120 (or a set of UEs that includes the UE 120) from the data source 212 (such as a data pipeline or a data queue) . In some examples, the transmit processor 214 may select one or more MCSs for the UE 120 in accordance with one or more channel quality indicators (CQIs) received from the UE 120. The network node 110 may process the data (for example, including encoding the data) for transmission to the UE 120 on a downlink in accordance with the MCS (s) selected for the UE 120 to generate data symbols. The transmit processor 214 may process system information (for example, semi-static resource partitioning information (SRPI) ) and / or control information (for example, CQI requests, grants, and / or upper layer signaling) and provide overhead symbols and / or control symbols. The transmit processor 214 may generate reference symbols for reference signals (for example, a cell-specific reference signal (CRS) , a demodulation reference signal (DMRS) , or a channel state information (CSI) reference signal (CSI- RS) ) and / or synchronization signals (for example, a primary synchronization signal (PSS) or a secondary synchronization signals (SSS) ) .
[0058] The TX MIMO processor 216 may perform spatial processing (for example, precoding) on the data symbols, the control symbols, the overhead symbols, and / or the reference symbols, if applicable, and may provide a set of output symbol streams (for example, T output symbol streams) to the set of modems 232. For example, each output symbol stream may be provided to a respective modulator component (shown as MOD) of a modem 232. Each modem 232 may use the respective modulator component to process (for example, to modulate) a respective output symbol stream (for example, for orthogonal frequency division multiplexing (OFDM) ) to obtain an output sample stream. Each modem 232 may further use the respective modulator component to process (for example, convert to analog, amplify, filter, and / or upconvert) the output sample stream to obtain a time domain downlink signal. The modems 232a through 232t may together transmit a set of downlink signals (for example, T downlink signals) via the corresponding set of antennas 234.
[0059] A downlink signal may include a DCI communication, a MAC-CE communication, an RRC communication, a downlink reference signal, or another type of downlink communication. Downlink signals may be transmitted on a PDCCH, a PDSCH, and / or on another downlink channel. A downlink signal may carry one or more transport blocks (TBs) of data. A TB may be a unit of data that is transmitted over an air interface in the wireless communication network 100. A data stream (for example, from the data source 212) may be encoded into multiple TBs for transmission over the air interface. The quantity of TBs used to carry the data associated with a particular data stream may be associated with a TB size common to the multiple TBs. The TB size may be based on or otherwise associated with radio channel conditions of the air interface, the MCS used for encoding the data, the downlink resources allocated for transmitting the data, and / or another parameter. In general, the larger the TB size, the greater the amount of data that can be transmitted in a single transmission, which reduces signaling overhead. However, larger TB sizes may be more prone to transmission and / or reception errors than smaller TB sizes, but such errors may be mitigated by more robust error correction techniques.
[0060] For uplink communication from the UE 120 to the network node 110, uplink signals from the UE 120 may be received by an antenna 234, may be processed by a modem 232 (for example, a demodulator component, shown as DEMOD, of a modem 232) , may be detected by the MIMO detector 236 (for example, a receive (Rx) MIMO processor) if applicable, and / or may be further processed by the receive processor 238 to obtain decoded data and / or control information. The receive processor 238 may provide the decoded data to a data sink 239 (which may be a data pipeline, a data queue, and / or another type of data sink) and provide the decoded control information to a processor, such as the controller / processor 240.
[0061] The network node 110 may use the scheduler 246 to schedule one or more UEs 120 for downlink or uplink communications. In some aspects, the scheduler 246 may use DCI to dynamically schedule DL transmissions to the UE 120 and / or UL transmissions from the UE 120. In some examples, the scheduler 246 may allocate recurring time domain resources and / or frequency domain resources that the UE 120 may use to transmit and / or receive communications using an RRC configuration (for example, a semi-static configuration) , for example, to perform semi-persistent scheduling (SPS) or to configure a configured grant (CG) for the UE 120.
[0062] One or more of the transmit processor 214, the TX MIMO processor 216, the modem 232, the antenna 234, the MIMO detector 236, the receive processor 238, and / or the controller / processor 240 may be included in an RF chain of the network node 110. 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 one or more processors of the network node 110) . In some aspects, the RF chain may be or may be included in a transceiver of the network node 110.
[0063] In some examples, the network node 110 may use the communication unit 244 to communicate with a core network and / or with other network nodes. The communication unit 244 may support wired and / or wireless communication protocols and / or connections, such as Ethernet, optical fiber, common public radio interface (CPRI) , and / or a wired or wireless backhaul, among other examples. The network node 110 may use the communication unit 244 to transmit and / or receive data associated with the UE 120 or to perform network control signaling, among other examples. The communication unit 244 may include a transceiver and / or an interface, such as a network interface.
[0064] The UE 120 may include a set of antennas 252 (shown as antennas 252a through 252r, where r ≥ 1) , a set of modems 254 (shown as modems 254a through 254u, where u ≥ 1) , a MIMO detector 256, a receive processor 258, a data sink 260, a data source 262, a transmit processor 264, a TX MIMO processor 266, a controller / processor 280, a memory 282, and / or a communication manager 140, among other examples. One or more of the components of the UE 120 may be included in a housing 284. In some aspects, one or a combination of the antenna (s) 252, the modem (s) 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, or the TX MIMO processor 266 may be included in a transceiver that is included in the UE 120. The transceiver may be under control of and used by one or more processors, such as the controller / processor 280, and in some aspects in conjunction with processor-readable code stored in the memory 282, to perform aspects of the methods, processes, or operations described herein. In some aspects, the UE 120 may include another interface, another communication component, and / or another component that facilitates communication with the network node 110 and / or another UE 120.
[0065] For downlink communication from the network node 110 to the UE 120, the set of antennas 252 may receive the downlink communications or signals from the network node 110 and may provide a set of received downlink signals (for example, R received signals) to the set of modems 254. For example, each received signal may be provided to a respective demodulator component (shown as DEMOD) of a modem 254. Each modem 254 may use the respective demodulator component to condition (for example, filter, amplify, downconvert, and / or digitize) a received signal to obtain input samples. Each modem 254 may use the respective demodulator component to further demodulate or process the input samples (for example, for OFDM) to obtain received symbols. The MIMO detector 256 may obtain received symbols from the set of modems 254, may perform MIMO detection on the received symbols if applicable, and may provide detected symbols. The receive processor 258 may process (for example, decode) the detected symbols, may provide decoded data for the UE 120 to the data sink 260 (which may include a data pipeline, a data queue, and / or an application executed on the UE 120) , and may provide decoded control information and system information to the controller / processor 280.
[0066] For uplink communication from the UE 120 to the network node 110, the transmit processor 264 may receive and process data ( “uplink data” ) from a data source 262 (such as a data pipeline, a data queue, and / or an application executed on the UE 120) and control information from the controller / processor 280. The control information may include one or more parameters, feedback, one or more signal measurements, and / or other types of control information. In some aspects, the receive processor 258 and / or the controller / processor 280 may determine, for a received signal (such as received from the network node 110 or another UE) , one or more parameters relating to transmission of the uplink communication. The one or more parameters may include a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, a CQI parameter, or a TPC parameter, among other examples. The control information may include an indication of the RSRP parameter, the RSSI parameter, the RSRQ parameter, the CQI parameter, the TPC parameter, and / or another parameter. The control information may facilitate parameter selection and / or scheduling for the UE 120 by the network node 110.
[0067] The transmit processor 264 may generate reference symbols for one or more reference signals, such as an uplink DMRS, an uplink SRS, and / or another type of reference signal. The symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266, if applicable, and further processed by the set of modems 254 (for example, for DFT-s-OFDM or CP-OFDM) . The TX MIMO processor 266 may perform spatial processing (for example, precoding) on the data symbols, the control symbols, the overhead symbols, and / or the reference symbols, if applicable, and may provide a set of output symbol streams (for example, U output symbol streams) to the set of modems 254. For example, each output symbol stream may be provided to a respective modulator component (shown as MOD) of a modem 254. Each modem 254 may use the respective modulator component to process (for example, to modulate) a respective output symbol stream (for example, for OFDM) to obtain an output sample stream. Each modem 254 may further use the respective modulator component to process (for example, convert to analog, amplify, filter, and / or upconvert) the output sample stream to obtain an uplink signal.
[0068] The modems 254a through 254u may transmit a set of uplink signals (for example, R uplink signals or U uplink symbols) via the corresponding set of antennas 252. An uplink signal may include a UCI communication, a MAC-CE communication, an RRC communication, or another type of uplink communication. Uplink signals may be transmitted on a PUSCH, a PUCCH, and / or another type of uplink channel. An uplink signal may carry one or more TBs of data. Sidelink data and control transmissions (that is, transmissions directly between two or more UEs 120) may generally use similar techniques as were described for uplink data and control transmission, and may use sidelink-specific channels such as a physical sidelink shared channel (PSSCH) , a physical sidelink control channel (PSCCH) , and / or a physical sidelink feedback channel (PSFCH) .
[0069] One or more antennas of the set of antennas 252 or the set of antennas 234 may include, or may be included within, 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. An antenna panel, an antenna group, a set of antenna elements, or an antenna array may include one or more antenna elements (within a single housing or multiple housings) , a set of coplanar antenna elements, a set of non-coplanar antenna elements, or one or more antenna elements coupled with one or more transmission or reception components, such as one or more components of Figure 2. As used herein, “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. “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 of the group of antennas. “Antenna module” may refer to circuitry including one or more antennas, which may also include one or more other components (such as filters, amplifiers, or processors) associated with integrating the antenna module into a wireless communication device.
[0070] In some examples, each of the antenna elements of an antenna 234 or an antenna 252 may include one or more sub-elements for radiating or receiving radio frequency signals. For example, a single antenna element may include a first sub-element cross-polarized with a second sub-element that can be used to independently transmit cross-polarized signals. The antenna elements may include patch antennas, dipole antennas, and / or other types of antennas arranged in a linear pattern, a two-dimensional pattern, or another pattern. A spacing between antenna elements may be such that signals with a desired wavelength transmitted separately by the antenna elements may interact or interfere constructively and destructively along various directions (such as to form a desired beam) . For example, given an expected range of wavelengths or frequencies, the spacing may provide a quarter wavelength, a half wavelength, or another fraction of a wavelength of spacing between neighboring antenna elements to allow for the desired constructive and destructive interference patterns of signals transmitted by the separate antenna elements within that expected range.
[0071] 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 phase shift, phase offset, and / or amplitude) to generate one or more beams, which is referred to as beamforming. The term “beam” may refer to a directional transmission of a wireless signal toward a receiving device or otherwise in a desired direction. “Beam” may also generally refer to a direction associated with such a directional signal transmission, a set of directional resources associated with the signal transmission (for example, an angle of arrival, a horizontal direction, and / or a vertical direction) , and / or 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. In some implementations, antenna elements may be individually selected or deselected for directional transmission of a signal (or signals) by controlling amplitudes of one or more corresponding amplifiers and / or phases of the signal (s) to form one or more beams. The shape of a beam (such as the amplitude, width, and / or presence of side lobes) and / or the direction of a beam (such as an angle of the beam relative to a surface of an antenna array) can be dynamically controlled by modifying the phase shifts, phase offsets, and / or amplitudes of the multiple signals relative to each other.
[0072] Different UEs 120 or network nodes 110 may include different numbers of antenna elements. For example, a UE 120 may include a single antenna element, two antenna elements, four antenna elements, eight antenna elements, or a different number of antenna elements. As another example, a network node 110 may include eight antenna elements, 24 antenna elements, 64 antenna elements, 128 antenna elements, or a different number of antenna elements. Generally, a larger number of antenna elements may provide increased control over parameters for beam generation relative to a smaller number of antenna elements, whereas a smaller number of antenna elements may be less complex to implement and may use less power than a larger number of antenna elements. Multiple antenna elements may support multiple-layer transmission, in which a first layer of a communication (which may include a first data stream) and a second layer of a communication (which may include a second data stream) are transmitted using the same time and frequency resources with spatial multiplexing.
[0073] Figure 3 is a diagram illustrating an example disaggregated base station architecture 300 in accordance with the present disclosure. One or more components of the example disaggregated base station architecture 300 may be, may include, or may be included in one or more network nodes (such one or more network nodes 110) . The disaggregated base station architecture 300 may include a CU 310 that can communicate directly with a core network 320 via a backhaul link, or that can communicate indirectly with the core network 320 via one or more disaggregated control units, such as a Non-RT RIC 350 associated with a Service Management and Orchestration (SMO) Framework 360 and / or a Near-RT RIC 370 (for example, via an E2 link) . The CU 310 may communicate with one or more DUs 330 via respective midhaul links, such as via F1 interfaces. Each of the DUs 330 may communicate with one or more RUs 340 via respective fronthaul links. Each of the RUs 340 may communicate with one or more UEs 120 via respective RF access links. In some deployments, a UE 120 may be simultaneously served by multiple RUs 340.
[0074] Each of the components of the disaggregated base station architecture 300, including the CUs 310, the DUs 330, the RUs 340, the Near-RT RICs 370, the Non-RT RICs 350, and the SMO Framework 360, may include one or more interfaces or may be coupled with one or more interfaces for receiving or transmitting signals, such as data or information, via a wired or wireless transmission medium.
[0075] In some aspects, the CU 310 may be logically split into one or more CU user plane (CU-UP) units and one or more CU control plane (CU-CP) units. A CU-UP unit may communicate bidirectionally with a CU-CP unit via an interface, such as the E1 interface when implemented in an O-RAN configuration. The CU 310 may be deployed to communicate with one or more DUs 330, as necessary, for network control and signaling. Each DU 330 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 340. For example, a DU 330 may host various layers, such as an RLC layer, a MAC layer, or one or more PHY layers, such as one or more high PHY layers or one or more low PHY layers. Each layer (which also may be referred to as a module) may be implemented with an interface for communicating signals with other layers (and modules) hosted by the DU 330, or for communicating signals with the control functions hosted by the CU 310. Each RU 340 may implement lower layer functionality. In some aspects, real-time and non-real-time aspects of control and user plane communication with the RU (s) 340 may be controlled by the corresponding DU 330.
[0076] The SMO Framework 360 may support RAN deployment and provisioning of non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO Framework 360 may support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operations and maintenance interface, such as an O1 interface. For virtualized network elements, the SMO Framework 360 may interact with a cloud computing platform (such as an open cloud (O-Cloud) platform 390) to perform network element life cycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface, such as an O2 interface. A virtualized network element may include, but is not limited to, a CU 310, a DU 330, an RU 340, a non-RT RIC 350, and / or a Near-RT RIC 370. In some aspects, the SMO Framework 360 may communicate with a hardware aspect of a 4G RAN, a 5G NR RAN, and / or a 6G RAN, such as an open eNB (O-eNB) 380, via an O1 interface. Additionally or alternatively, the SMO Framework 360 may communicate directly with each of one or more RUs 340 via a respective O1 interface. In some deployments, this configuration can enable each DU 330 and the CU 310 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
[0077] The Non-RT RIC 350 may include or may implement a logical function that enables non-real-time control and optimization of RAN elements and resources, AI / ML workflows including model training and updates, and / or policy-based guidance of applications and / or features in the Near-RT RIC 370. The Non-RT RIC 350 may be coupled to or may communicate with (such as via an A1 interface) the Near-RT RIC 370. The Near-RT RIC 370 may include or may implement a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions via an interface (such as via an E2 interface) connecting one or more CUs 310, one or more DUs 330, and / or an O-eNB with the Near-RT RIC 370.
[0078] In some aspects, to generate AI / ML models to be deployed in the Near-RT RIC 370, the Non-RT RIC 350 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 370 and may be received at the SMO Framework 360 or the Non-RT RIC 350 from non-network data sources or from network functions. In some examples, the Non-RT RIC 350 or the Near-RT RIC 370 may tune RAN behavior or performance. For example, the Non-RT RIC 350 may monitor long-term trends and patterns for performance and may employ AI / ML models to perform corrective actions via the SMO Framework 360 (such as reconfiguration via an O1 interface) or via creation of RAN management policies (such as A1 interface policies) .
[0079] The network node 110, the controller / processor 240 of the network node 110, the UE 120, the controller / processor 280 of the UE 120, the CU 310, the DU 330, the RU 340, or any other component (s) of Figures 1, 2, or 3 may implement one or more techniques or perform one or more operations associated with uplink power control for an uplink-only network node, as described in more detail elsewhere herein. For example, the controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, any other component (s) of Figure 2, the CU 310, the DU 330, or the RU 340 may perform or direct operations of, for example, process 700 of Figure 7 or other processes as described herein (alone or in conjunction with one or more other processors) . The memory 242 may store data and program codes for the network node 110, the network node 110, the CU 310, the DU 330, or the RU 340. The memory 282 may store data and program codes for the UE 120. In some examples, the memory 242 or the memory 282 may include a non-transitory computer-readable medium storing a set of instructions (for example, code or program code) for wireless communication. The memory 242 may include one or more memories, such as a single memory or multiple different memories (of the same type or of different types) . The memory 282 may include one or more memories, such as a single memory or multiple different memories (of the same type or of different types) . For example, the set of instructions, when executed (for example, directly, or after compiling, converting, or interpreting) by one or more processors of the network node 110, the UE 120, the CU 310, the DU 330, or the RU 340, may cause the one or more processors to perform process 700 of Figure 7 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.
[0080] In some aspects, the UE 120 includes means for receiving, from a first network node 110, a beam indication DCI message indicating an uplink TCI state and a power control parameter associated with the uplink TCI state; and / or means for transmitting, to the first network node or a second network node 110, an uplink communication using the uplink TCI state and a transmit power associated with the power control parameter. The means for the UE 120 to perform operations described herein may include, for example, one or more of communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282.
[0081] Figure 4 is a diagram illustrating an example 400 of using beams for access link communications between a network node and a UE in accordance with the present disclosure. As shown in Figure 4, a network node 110 and a UE 120 may communicate with one another in a wireless network (e.g., wireless network 100) .
[0082] The network node 110 may transmit to UEs 120 located within a coverage area of the network node 110. The network node 110 and the UE 120 may be configured for beamformed communications, where the network node 110 may transmit in the direction of the UE 120 using a directional NN transmit beam (for example, a downlink transmit beam) , and the UE 120 may receive the transmission using a directional UE receive beam (for example, a downlink receive beam) . Each NN transmit beam may have an associated beam ID, beam direction, or beam symbols, among other examples. The network node 110 may transmit downlink communications via one or more NN transmit beams 405.
[0083] The UE 120 may attempt to receive downlink transmissions via one or more UE receive beams 410, which may be configured using different beamforming parameters at receive circuitry of the UE 120. The UE 120 may identify a particular NN transmit beam 405, shown as NN transmit beam 405A, and a particular UE receive beam 410, shown as UE receive beam 410A, that provide relatively favorable performance (for example, that have a best channel quality of the different measured combinations of NN transmit beams 405 and UE receive beams 410) . In some examples, the UE 120 may transmit an indication of which NN transmit beam 405 is identified by the UE 120 as a preferred NN transmit beam, which the network node 110 may select for transmissions to the UE 120. The UE 120 may thus attain and maintain a beam pair link (BPL) with the network node 110 for downlink communications (for example, a combination of the NN transmit beam 405A and the UE receive beam 410A) , which may be further refined and maintained in accordance with one or more established beam refinement procedures.
[0084] A downlink beam, such as an NN transmit beam 405 or a UE receive beam 410, may be associated with a TCI state. A TCI state may indicate a directionality or a characteristic of the downlink beam, such as one or more QCL properties of the downlink beam. A QCL property may include, for example, a Doppler shift, a Doppler spread, an average delay, a delay spread, or spatial receive parameters, among other examples. In some examples, each NN transmit beam 405 may be associated with a synchronization signal block (SSB) , and the UE 120 may indicate a preferred NN transmit beam 405 by transmitting uplink transmissions in resources of the SSB that are associated with the preferred NN transmit beam 405. A particular SSB may have an associated TCI state (for example, for an antenna port or for beamforming) . The network node 110 may, in some examples, indicate a downlink NN transmit beam 405 based at least in part on antenna port QCL properties that may be indicated by the TCI state. A TCI state may be associated with one downlink reference signal set (for example, an SSB and an aperiodic, periodic, or semi-persistent CSI-RS) for different QCL types (for example, QCL types for different combinations of Doppler shift, Doppler spread, average delay, delay spread, or spatial receive parameters, among other examples) . In cases where the QCL type indicates spatial receive parameters, the QCL type may correspond to analog receive beamforming parameters of a UE receive beam 410 at the UE 120. Thus, the UE 120 may select a corresponding UE receive beam 410 from a set of BPLs based at least in part on the network node 110 indicating an NN transmit beam 405 via a TCI indication.
[0085] The network node 110 may maintain a set of activated TCI states for downlink shared channel transmissions and a set of activated TCI states for downlink control channel transmissions. The set of activated TCI states for downlink shared channel transmissions may correspond to beams that the network node 110 uses for downlink transmission on a PDSCH. The set of activated TCI states for downlink control channel communications may correspond to beams that the network node 110 may use for downlink transmission on a PDCCH or in a control resource set (CORESET) . The UE 120 may also maintain a set of activated TCI states for receiving the downlink shared channel transmissions and the CORESET transmissions. If a TCI state is activated for the UE 120, then the UE 120 may have one or more antenna configurations based at least in part on the TCI state, and the UE 120 may not need to reconfigure antennas or antenna weighting configurations. In some examples, the set of activated TCI states (for example, activated PDSCH TCI states and activated CORESET TCI states) for the UE 120 may be configured by a configuration message, such as an RRC message.
[0086] Similarly, for uplink communications, the UE 120 may transmit in the direction of the network node 110 using a directional UE transmit beam (for example, an uplink transmit beam) , and the network node 110 may receive the transmission using a directional NN receive beam. Each UE transmit beam may have an associated beam ID, beam direction, or beam symbols, among other examples. The UE 120 may transmit uplink communications via one or more UE transmit beams 415.
[0087] The network node 110 may receive uplink transmissions via one or more NN receive beams 420 (for example, uplink receive beams) . The network node 110 may identify a particular UE transmit beam 415, shown as UE transmit beam 415A, and a particular NN receive beam 420, shown as NN receive beam 420A, that provide relatively favorable performance (for example, that have a best channel quality of the different measured combinations of UE transmit beams 415 and NN receive beams 420) . In some examples, the network node 110 may transmit an indication of which UE transmit beam 415 is identified by the network node 110 as a preferred UE transmit beam, which the network node 110 may select for transmissions from the UE 120. The UE 120 and the network node 110 may thus attain and maintain a BPL for uplink communications (for example, a combination of the UE transmit beam 415A and the NN receive beam 420A) , which may be further refined and maintained in accordance with one or more established beam refinement procedures. An uplink beam, such as a UE transmit beam 415 or an NN receive beam 420, may be associated with a spatial relation. A spatial relation may indicate a directionality or a characteristic of the uplink beam, similar to one or more QCL properties, as described above.
[0088] Additionally or alternatively, as shown in Figure 4, the network node 110 and the UE 120 may communicate using a unified TCI framework, in which case the network node 110 may indicate a TCI state that the UE 120 is to use for beamformed uplink communications. For example, in a unified TCI framework, a joint TCI state (which may be referred to as a joint downlink and uplink TCI state) may be used to indicate a common beam that the UE 120 is to use for downlink communication and uplink communication. In this case, the joint downlink and uplink TCI state may include at least one source reference signal to provide a reference (or UE assumption) for determining QCL properties for a downlink communication or a spatial filter for uplink communication. For example, the joint downlink and uplink TCI state may be associated with one or more source reference signals that provide common QCL information for UE-dedicated PDSCH reception and one or more CORESETs in a component carrier, or one or more source reference signals that provide a reference to determine one or more common uplink transmission spatial filters for a PUSCH transmission based on a dynamic grant or a configured grant or one or more dedicated PUCCH resources in a component carrier.
[0089] Additionally or alternatively, the unified TCI framework may support separate downlink and uplink TCI states to accommodate separate downlink and uplink beam indications (for example, in cases where a best uplink beam does not correspond to a best downlink beam, or vice versa) . In such cases, each valid uplink TCI state may be associated with a source reference signal to indicate an uplink transmit beam for a target uplink communication (for example, a target uplink reference signal or a target uplink channel) . For example, the source reference signal may be an SRS, an SSB, or a CSI-RS, among other examples, and the target uplink communication may be a PRACH, a PUCCH, a PUSCH, an SRS, and / or a DMRS (for example, for a PUCCH or a PUSCH) , among other examples. In this way, supporting joint TCI states or separate downlink and uplink TCI states may enable a unified TCI framework for downlink and uplink communications and / or may enable the network node 110 to indicate various uplink QCL relationships (for example, Doppler shift, Doppler spread, average delay, or delay spread, among other examples) for uplink TCI communication.
[0090] In a wireless network that supports the unified TCI framework, the network node 110 may transmit a DCI message that carries a TCI state indication to change a downlink beam, an uplink beam, and / or a joint downlink and uplink beam that the UE 120 uses to communicate with the network node 110, and the UE 120 may subsequently transmit HARQ feedback to the network node 110 to acknowledge the TCI state indication. In general, the UE 120 may apply the TCI state indication starting from a first slot that is at least a configured number of symbols (for example, Y symbols) after a last symbol of an uplink transmission that carries the HARQ feedback. Accordingly, the configured number of symbols may generally define a beam application time that starts after the last symbol of the uplink transmission that carries the HARQ feedback and has a duration that depends on one or more active BWPs in one or more sets of component carriers applying the updated beam associated with the TCI state indication. For example, because the beam application time is based on a configured number of symbols, the duration of the beam application time may depend on a subcarrier spacing that defines a symbol duration for an active BWP.
[0091] Figures 5A-5B are diagrams illustrating examples 500A and 500B of a TCI state indication in a unified TCI framework in accordance with the present disclosure. In some aspects, example 500A in Figure 5A illustrates a TCI state indication that may be provided in a beam indication DCI message in a unified TCI framework, and example 500B in Figure 5B illustrates a TCI state indication provided in a beam indication DCI message to enable mTRP operation in a unified TCI framework.
[0092] In a unified TCI framework, a network node 110 may configure a UE 120 with a unified TCI state type per component carrier. For example, in cases where the UE 120 is configured with a joint TCI state that indicates a common beam that the UE 120 is to use for downlink and uplink communication, the network node 110 may configure the UE 120 with up to 128 TCI states (for example, indicated in a dl-OrJointTCI-StateList parameter) for downlink and uplink operation. In such cases, the joint TCI state can provide a reference signal for the QCL for a DMRS carried in a PDSCH, a DMRS carried in a PDCCH, and / or a CSI-RS and for determining an uplink transmission spatial filter for a dynamic PUSCH, a configured grant, a PUCCH, and / or an SRS. Alternatively, in cases where the UE 120 is configured with separate downlink and uplink TCI states, the UE 120 may be configured with up to 128 downlink TCI states (e.g., in a dl-OrJointTCI-StateList parameter) for downlink operation and up to 64 uplink TCI states (e.g., in an ul-TCI-ToAddModList parameter) for uplink operation. In such cases, the downlink TCI state can provide a source reference signal for the QCL for a DMRS carried in a PDSCH, a DMRS carried in a PDCCH, and / or a CSI-RS, and the uplink TCI state can be used to determine the uplink transmission spatial filter for a dynamic PUSCH, configured grant, PUCCH, and / or SRS.
[0093] In some aspects, in the unified TCI framework, a network node 110 may transmit a TCI state activation MAC-CE that activates up to 8 TCI states and / or TCI state pairs that each include one downlink TCI state and one uplink TCI state, and a beam indication DCI message (for example, a DCI message associated with DCI format 1_1 or 1_2) may indicate one of the activated TCI states or one of the activated TCI state pairs. Additionally or alternatively, the TCI state activation MAC-CE may indicate a mapping between a TCI codepoint carried in the beam indication DCI message and any suitable combination of a first downlink TCI state, a first uplink TCI state, a second downlink TCI state, and a second uplink TCI state. In some aspects, the beam activation DCI message may include a downlink grant that schedules a PDSCH, or the beam activation DCI message may be transmitted without a PDSCH assignment.
[0094] Accordingly, when a network node 110 transmits a beam indication DCI message to indicate a downlink TCI state, an uplink TCI state, or a joint TCI state, the TCI state indication may be unrelated to the scheduled PDSCH, and is not a one-time indication. Instead, when the TCI state indication is applied (for example, as shown in Figures 5A-5B) , the indicated TCI state remains applicable to the associated channels and / or signals until another beam indication DCI messages indicates a different TCI state. Furthermore, an application time for the TCI state indicated in the beam indication DCI message is the first slot that is at least Y symbols after the last symbol of a PUCCH that carries HARQ-ACK feedback for the beam indication DCI message. For example, as shown in Figure 5A, a network node 110 may transmit, and a UE 120 may receive, a beam indication DCI message 505 that includes a TCI field codepoint 510, where the beam indication DCI message 505 is received at the UE 120 after a TCI state activation MAC-CE has activated two or more TCI states (for example, the beam indication DCI message 505 may be unnecessary if the TCI state activation MAC-CE activates only one TCI state) . Accordingly, the TCI field codepoint 510 may be mapped to one TCI state or one TCI state pair (one downlink TCI state and one uplink TCI state) among the TCI states that were activated by the TCI state activation MAC-CE. As further shown in Figure 5A, the UE 120 may then transmit a PUCCH 515 that includes HARQ-ACK feedback for the beam indication DCI message. As shown by reference number 520, the TCI state indication may then be applied to downlink channels and / or signals, uplink channels and / or signals, or both (for example, depending on the type of the TCI field codepoint 510) , starting in the first slot that is at least Y symbols after a last symbol of the PUCCH 515 carrying the HARQ-ACK feedback (for example, where Y has a value that is RRC-configured in accordance with a capability of the UE 120) .
[0095] Additionally or alternatively, Figure 5B illustrates techniques for applying a beam indication DCI message that may support mTRP operation. For example, as described herein, the TCI state activation MAC-CE may indicate a mapping 525 between TCI codepoints that may be indicated in a beam indication DCI message and any suitable combination of a first downlink TCI state, a first uplink TCI state, a second downlink TCI state, and a second uplink TCI state. For example, in Figure 5B, the mapping 525 associates TCI codepoint “000” with a first downlink TCI state (#a1) and a first uplink TCI state (#b1) , TCI codepoint “001” with a first downlink TCI state (#a1) , a second downlink TCI state (#a2) , a first uplink TCI state (#b1) , and a second uplink TCI state (#b2) , and so on. Accordingly, the TCI state activation MAC-CE may activate up to 8 full sets or subsets that include one or more of a first downlink TCI state, a first uplink TCI state, a second downlink TCI state, or a second uplink TCI state.
[0096] Accordingly, as further shown in Figure 5B, the network node 110 may transmit, and the UE 120 may receive, a beam indication DCI message 530 that includes a TCI field codepoint 535. In some aspects, the TCI field codepoint 535 may be mapped to one of the sets or subsets of downlink and / or uplink TCI states activated by the TCI state activation MAC-CE. For example, in Figure 5B, the TCI field codepoint 535 in the beam indication DCI message 530 may have a value of “010” , which corresponds to a first uplink TCI state (#b3) and a second uplink TCI state (#b4) . As further shown in Figure 5B, the UE 120 may then transmit a PUCCH 540 that includes HARQ-ACK feedback for the beam indication DCI message. As shown by reference number 545, the TCI state indication may then be applied to uplink channels and / or signals (for example, because the TCI field codepoint 535 is mapped to two uplink TCI states) , starting in the first slot that is at least Y symbols after a last symbol of the PUCCH 540 carrying the HARQ-ACK feedback. For example, after the application time, the UE 120 may receive a first DCI message 550-1 that carries an uplink grant scheduling a PUSCH, and an SRS resource set indicator (SRSI) field may indicate the TCI state (s) to be applied to the scheduled PUSCH. For example, in Figure 5B, the SRSI field in the first DCI message 550-1 has a value of “01” , which an SRSI mapping 555 associates with the second indicated uplink TCI state (#b4) . As further shown in Figure 5B, the UE 120 may subsequently receive a second DCI message 550-2 that carries an uplink grant scheduling a PUSCH, and the SRSI field in the second DCI message 550-2 has a value of “10, which an SRSI mapping 555 associates with the first and second indicated uplink TCI states (#b3, #b4) . Accordingly, as shown, the UE 120 may use the first uplink TCI state in a first occasion associated with the scheduled PUSCH, and may use the second uplink TCI state in a second occasion associated with the scheduled PUSCH. In general, when a DCI message scheduling a PUSCH indicates a “10” or “11” in the SRSI field, the first indicated uplink TCI state is applied to the PUSCH occasion associated with the first SRS resource set, the second indicated uplink TCI state is applied to the PUSCH occasion associated with the second SRS resource set.
[0097] In some aspects, when a network node 110 uses DCI format 1_1 or DCI format 1_2 to provide a beam indication, a cyclic redundancy code (CRC) associated with the beam indication DCI message may be scrambled using a configured scheduling radio network temporary identifier (CS-RNTI) . Furthermore, the beam indication DCI message may include a redundancy version (RV) field with all bits set to 1, an MCS field with all bits set to 1, a new data indicator (NDI) field set to 0, and a frequency domain resource allocation (FDRA) field set with all bits set to 0 for a first FDRA type (for example, FDRA type 0) or for a dynamicSwitch or with all bits set to 1 for a second FDRA type (for example, FDRA type 1) . Furthermore, the beam indication DCI message includes a TCI field that is always present to indicate a TCI codepoint among multiple TCI codepoints that were activated in a TCI state activation MAC-CE. Furthermore, in some aspects, the beam indication DCI message may include fields to indicate a DCI format identifier, a carrier indicator, a BWP indicator, a time domain resource allocation (TDRA) , a downlink assignment index (if configured) , a TPC command for a scheduled PUCCH, a PUCCH resource indicator, and / or a PDSCH-to-HARQ feedback timing indicator (if present) . Furthermore, in some cases, the beam indication DCI message may include one or more unused DCI fields and / or codepoints (for example, a HARQ process number (HPN) field) .
[0098] Figures 6A-6E are diagrams illustrating examples 600 associated with uplink power control for an uplink-only network node in accordance with the present disclosure. As shown in Figure 6A, examples 600 includes communication between a UE, a network node that supports downlink communication or downlink and uplink communication (for example, a macro node, a central node, a serving cell, a serving network node, or another suitable network node, shown as “NN (DL / UL) ” with a gray fill) , and multiple uplink-only network nodes (shown with a diagonal fill) . In some aspects, the UE, the network node, and the uplink-only network nodes may communicate in a wireless network, such as wireless network 100. The UE may communicate with the network node on a downlink or an uplink and a downlink, and may communicate with the uplink-only network nodes only on an uplink.
[0099] Accordingly, to improve uplink coverage and / or uplink capacity, the various uplink-only network nodes may provide an uplink dense deployment in one or more coverage regions. More particularly, the uplink dense deployment may provide asymmetric downlink and uplink densification, where a quantity of the uplink-only network nodes generally exceeds a quantity of network nodes that support downlink communication or downlink and uplink communication. For example, in an uplink dense deployment, uplink signals and / or uplink channels that are transmitted by the UE are received by one or more uplink-only network nodes, and downlink signals and / or downlink channels are transmitted from the network node. In this way, the uplink dense deployment may reduce an uplink pathloss, which may improve performance in cases where uplink coverage is a performance bottleneck and / or reduce deployment costs and / or deployment complexity because the uplink-only network nodes do not transmit any downlink signals or downlink channels. Instead, the uplink-only network nodes only need to receive the uplink signals and / or uplink channels and then forward the uplink signals and / or uplink channels to the network node via a backhaul.
[0100] However, one challenge that may arise in the uplink dense deployment relates to uplink power control. For example, uplink power control in a wireless network is typically calculated in accordance with various parameters, including a pathloss that is determined from a downlink PLRS. For example, uplink power control is generally calculated according to the following power control formula: Ptx=min {PCMAX, P0+α·PL+Δ}
[0101] where Ptxis an uplink transmit power, PCMAX is a UE-configured maximum output power, P0 is a preconfigured received power target that assumes full pathloss compensation, α is a fractional power control factor that has a value between 0 and 1 (where α=0 means that there is no pathloss compensation and all UEs transmit at the same power, and α=1 means that there is full pathloss compensation that attempts to equalize the received power for all UEs) , PL is a pathloss measurement that may be determined from a downlink PLRS, and Δ is a closed-loop power control component that allows a network node to adjust the transmit power at a UE using a TPC command. However, because an uplink-only network node does not transmit any downlink signals or downlink channels, there is no downlink PLRS transmitted from an uplink-only network node that a UE can measure to determine the pathloss for uplink power control.
[0102] Accordingly, some aspects described herein relate to techniques to indicate, in a beam indication DCI message, a power control parameter that the UE can use to calculate an uplink transmit power for an uplink communication to be transmitted to an uplink-only network node that does not transmit a downlink PLRS. For example, in a first operation 610, the network node may transmit, and the UE may receive, a beam indication DCI message that indicates one or more uplink TCI states (for example, one or more joint TCI states and / or one or more separate uplink TCI states) . Furthermore, in some aspects, the beam indication DCI message may include a power control parameter that the UE can use to calculate an uplink transmit power. For example, the power control parameter may include a pathloss offset applied to the uplink TCI state (s) indicated in the beam indication DCI message, a pathloss scaling factor (β or α) applied to the uplink TCI state (s) indicated in the beam indication DCI message, or a TPC command applied to the closed-loop index (es) associated with the uplink TCI state (s) indicated in the beam indication DCI message for closed-loop power control.
[0103] In some aspects, the power control parameter (for example, the pathloss offset, pathloss scaling factor, and / or TPC command) may be indicated in one or more fields of a beam indication DCI message without a downlink assignment. For example, as described herein, DCI format 1_1 and DCI format 1_2 include one or more fields that are reserved or otherwise unused for any other purpose (for example, an HPN field) , which may be reused or repurposed for the power control parameter indication. In some aspects, a mapping between codepoints of the field (s) used to indicate the power control parameter and possible values for the power control parameter may be defined or specified (for example, in a wireless communication standard) or configured by the network node (for example, in one or more RRC messages) . For example, in some aspects, the mapping may be defined or configured in a table or another suitable data structure such that each codepoint that may be indicated in the field (s) used for the power control parameter is mapped to a corresponding value for the power control parameter (for example, a pathloss offset value, a pathloss scaling factor value, or a TPC command value) . Additionally or alternatively, the network node may configure a set of candidate values for the power control parameter in one or more RRC messages, and each codepoint that may be indicated in the field (s) used for the power control parameter may be mapped to a candidate value for the power control parameter.
[0104] In some aspects, as described herein, the uplink dense deployment may support single TRP (sTRP) operation, where the UE transmits on an uplink to one uplink-only node, or the uplink dense deployment may support mTRP operation, where the UE transmits on an uplink to multiple uplink-only nodes. In cases where uplink mTRP operation is configured (for example, in a spatial division multiplexing (SDM) mode, a time division multiplexing (TDM) mode, or an SFN mode) , the beam indication DCI message may indicate more than one uplink TCI state (for example, two uplink TCI states, two joint TCI states, or one uplink TCI state and one joint TCI state) . In such cases, an unused or reserved field in the beam indication DCI message that is repurposed to indicate the power control parameter may be divided into a first field and a second field, where the first field indicates a first codepoint or a first value associated with a first uplink TCI state indicated in the beam indication DCI message and the second field indicates a second codepoint or a second value associated with a second uplink TCI state indicated in the beam indication DCI message. Alternatively, the unused or reserved field in the beam indication DCI message may indicate the first codepoint or the first value associated with the first uplink TCI state, and a new field may be added to the beam indication DCI message to indicate the second codepoint or the second value associated with the second uplink TCI state. Alternatively, the unused or reserved field in the beam indication DCI message may indicate a codepoint or value applicable to both the first uplink TCI state and the second uplink TCI state. Furthermore, in cases where uplink mTRP is configured (for example, in an SDM mode, a TDM mode, or an SFN mode) , the network node may configure a common set of candidate values for the power control parameter for both uplink TCI states indicated in the beam indication DCI message or two sets of candidate values for the power control parameter, where each set of candidate values corresponds to one of the indicated uplink TCI states.
[0105] As further shown in Figure 6A, in a second operation 620, the UE may calculate an uplink transmit power in accordance with the value of the power control parameter indicated in the beam indication DCI message. For example, when the power control parameter indicated in the beam indication DCI message is a pathloss offset, the pathloss offset may be applied to the corresponding uplink TCI state (s) with respect to a downlink pathloss that may be measured in accordance with a PLRS associated with the indicated uplink TCI state (s) . Alternatively, the pathloss offset may be applied to the corresponding uplink TCI state (s) with respect to a downlink pathloss that may be measured in accordance with a reference PLRS (for example, a PLRS with a lowest or a highest PLRS identifier among one or more PLRSs associated with a set of activated TCI states, a PLRS associated with a lowest or a highest downlink pathloss value among one or more downlink pathloss values measured in accordance with the one or more PLRSs associated with the set of activated TCI states, or a PLRS associated with a lowest or a highest TCI state identifier among the set of activated TCI states indicated in a TCI state activation MAC-CE) . For example, the pathloss offset may be subtracted from the downlink pathloss to determine the pathloss associated with the uplink TCI state indicated in the beam indication DCI message.
[0106] Figure 6B illustrates a scenario 630 in which the power control parameter indicated in the beam indication DCI message is a pathloss offset. For example, as shown in Figure 6B, the network node may transmit, and the UE may receive, a first beam indication DCI message that indicates an uplink TCI state (for example, corresponding to a beam direction associated with an uplink-only node) and a pathloss offset value of 50 decibels (dB) or a codepoint that corresponds or otherwise maps to a pathloss offset value of 50 dB. As described herein, the pathloss offset value may be applied with respect to a downlink pathloss, PLd, which has a value of 90 dB that is measured in accordance with a PLRS associated with the indicated uplink TCI state or a reference PLRS. As shown in Figure 6B, the uplink TCI state indicated in the first beam indication DCI message applies to a first uplink communication and a second uplink communication (shown as UL1 and UL2) that are at least Y symbols after a PUCCH that carries HARQ-ACK feedback for the first beam indication DCI message. Accordingly, when calculating the pathloss associated with the uplink TCI state, the UE may apply the pathloss offset with respect to the downlink pathloss by subtracting the pathloss offset value, PLOb, f, c, from the downlink pathloss, such that the pathloss used in the power control formula, is 40 dB for the first uplink communication and the second uplink communication.
[0107] Furthermore, the UE may use similar techniques to apply a pathloss offset value indicated in subsequent beam indication DCI messages. For example, as further shown in Figure 6B, the network node may transmit, and the UE may receive, a second beam indication DCI message that indicates an uplink TCI state (for example, corresponding to a beam direction associated with the uplink-only node) and a pathloss offset value of 30 dB or a codepoint that corresponds or otherwise maps to a pathloss offset value of 30 dB (for example, the pathloss offset value may change due to the UE moving or otherwise changing locations such that there is a change in the pathloss between the UE and the uplink-only node) . As described herein, the pathloss offset value may be applied with respect to a downlink pathloss, PLd, which has a value of 80 dB at the time that the second beam indication DCI message is received (for example, in accordance with the PLRS associated with the indicated uplink TCI state or the reference PLRS) . As shown, the uplink TCI state indicated in the second beam indication DCI message applies to a third uplink communication (shown as UL3) that is at least Y symbols after a PUCCH that carries HARQ-ACK feedback for the second beam indication DCI message. Accordingly, when calculating the pathloss associated with the uplink TCI state indicated in the second beam indication DCI message, the UE may subtract the 30 dB value of the pathloss offset, PLOb, f, c, from the 80 dB value of the downlink pathloss, such that the pathloss used in the power control formula, is 50 dB for the third uplink communication.
[0108] Additionally or alternatively, when the power control parameter indicated in the beam indication DCI message is a pathloss scaling factor, β or α, the pathloss scaling factor may be applied to the corresponding uplink TCI state (s) with respect to a downlink pathloss that may be measured in accordance with a PLRS associated with the indicated uplink TCI state (s) . Alternatively, the pathloss scaling factor may be applied to the corresponding uplink TCI state (s) with respect to a downlink pathloss that may be measured in accordance with a reference PLRS (for example, a PLRS with a lowest or a highest PLRS identifier among the one or more PLRSs associated with the set of activated TCI states, a PLRS associated with a lowest or a highest downlink pathloss value among the one or more downlink pathloss values measured in accordance with the one or more PLRSs associated with the set of activated TCI states, or a PLRS associated with a lowest or a highest TCI state identifier among the set of activated TCI states indicated in a TCI state activation MAC-CE) . For example, the pathloss scaling factor may be multiplied by the downlink pathloss to determine the pathloss associated with the uplink TCI state indicated in the beam indication DCI message. In some aspects, when the pathloss scaling factor is a value for β, the pathloss scaling factor indicates a scaling factor for uplink pathloss relative to a reference pathloss. Alternatively, when the pathloss scaling factor is a value for α, the pathloss scaling factor indicates a combined scaling factor of pathloss compensation coefficient and a scaling factor for uplink pathloss.
[0109] Figure 6C illustrates a scenario 640 in which the power control parameter indicated in the beam indication DCI message is a pathloss scaling factor indicating a value for β. For example, as shown in Figure 6C, the network node may transmit, and the UE may receive, a first beam indication DCI message that indicates an uplink TCI state (for example, corresponding to a beam direction associated with an uplink-only node) and a pathloss scaling factor of β = 0.4. As described herein, the pathloss offset value may be applied with respect to a downlink pathloss, PLd, which has a value of 90 dB that is measured in accordance with a PLRS associated with the indicated uplink TCI state or a reference PLRS. As shown in Figure 6B, the uplink TCI state indicated in the first beam indication DCI message applies to a first uplink communication (shown as UL1) that is at least Y symbols after a PUCCH that carries HARQ-ACK feedback for the first beam indication DCI message. Accordingly, when calculating the pathloss associated with the uplink TCI state, the UE may apply the pathloss scaling factor with respect to the downlink pathloss by multiplying the pathloss scaling factor, β, and the downlink pathloss, to determine an uplink pathloss, of 36 dB for the first uplink communication. Furthermore, because there is a 4 dB difference between the 36 dB value of and the 40 dB pathloss between the UE and the uplink-only node, the remaining pathloss offset of 4 dB may be accommodated by a closed-loop power control (for example, f1 (0) =4, in accordance with the uplink TCI state indicated in the first beam indication DCI message being associated with a closed-loop index, l, with a value of 0) .
[0110] Furthermore, the UE may use similar techniques to apply a pathloss scaling factor indicated in subsequent beam indication DCI messages. For example, as further shown in Figure 6C, the network node may transmit, and the UE may receive, a second beam indication DCI message that indicates an uplink TCI state (for example, corresponding to a beam direction associated with the uplink-only node) and a pathloss scaling factor value of 0.6 (for example, the value of the pathloss scaling factor may change due to the UE moving or otherwise changing locations such that there is a change in the pathloss between the UE and the uplink-only node) . As described herein, the pathloss offset value may be applied with respect to a downlink pathloss, PLd, which has a value of 80 dB at the time that the second beam indication DCI message is received (for example, in accordance with the PLRS associated with the indicated uplink TCI state or the reference PLRS) . As shown, the uplink TCI state indicated in the second beam indication DCI message applies to a second uplink communication (shown as UL2) that is at least Y symbols after a PUCCH that carries HARQ-ACK feedback for the second beam indication DCI message. Accordingly, when calculating the pathloss associated with the uplink TCI state indicated in the second beam indication DCI message, the UE may multiply the pathloss scaling factor, β, and the downlink pathloss, to determine an uplink pathloss, of 48 dB for the second uplink communication. Furthermore, because there is a 2 dB difference between the 48 dB value of and the 50 dB pathloss between the UE and the uplink-only node, the remaining pathloss offset of 2 dB may be accommodated by a closed-loop power control (for example, f2 (1) =2, in accordance with the uplink TCI state indicated in the second beam indication DCI message being associated with a closed-loop index, l, with a value of 1) .
[0111] Alternatively, in cases where the power control parameter indicated in the beam indication DCI message is a pathloss offset, the UE may apply the pathloss offset to a reference uplink pathloss associated with a TCI state activation MAC-CE. For example, as described herein, the network node may transmit, to the UE, a TCI state activation MAC-CE that activates up to 8 TCI states, TCI state pairs, and / or sets or subsets of TCI states that include one or more of a first downlink (or joint) TCI state, a first uplink TCI state, a second downlink (or joint) TCI state, or a second uplink TCI state. Accordingly, in some aspects, the TCI state activation MAC-CE may indicate a pathloss offset relative to a downlink pathloss, and the UE may derive an initial pathloss offset value, for each uplink TCI state activated by the TCI state activation MAC-CE in accordance with the initial pathloss offset indicated in the TCI state activation MAC-CE and the downlink pathloss. In some aspects, the downlink pathloss may be measured in accordance with a PLRS associated with the corresponding TCI state. Alternatively, the downlink pathloss may be measured in accordance with a reference PLRS (for example, a PLRS with a lowest or a highest PLRS identifier among the one or more PLRSs associated with the set of activated TCI states, a PLRS associated with a lowest or a highest downlink pathloss value among the one or more downlink pathloss values measured in accordance with the one or more PLRSs associated with the set of activated TCI states, and / or a PLRS associated with a lowest or a highest TCI state identifier among the set of activated TCI states) . Furthermore, in cases where a TCI codepoint can be mapped to two uplink TCI states, the TCI state activation MAC-CE may indicate separate pathloss offsets for each uplink TCI state that is mapped to the TCI codepoint or a common pathloss offset applicable to both uplink TCI states that are mapped to the same TCI codepoint.
[0112] For example, Figure 6D illustrates a scenario 650 where a TCI state activation MAC-CE indicates a pathloss offset relative to a downlink pathloss, which the UE uses to derive an initial uplink pathloss. In the scenario 650 illustrated in Figure 6D, the network node may transmit, and the UE may receive, a TCI state activation MAC-CE that activates up to 8 TCI states, TCI state pairs, and / or sets or subsets of TCI states, as described in more detail elsewhere herein. As shown in Figure 6D, the TCI state activation MAC-CE may indicate an initial pathloss offset, PLOb, f, c, which has a value of 40 dB relative to a downlink pathloss, which has a value of 90 dB. Accordingly, the UE may derive an initial pathloss offset value, for each uplink TCI state activated by the TCI state activation MAC-CE in accordance with the value of the initial pathloss offset indicated in the TCI state activation MAC-CE and the downlink pathloss. For example, as shown, the UE may derive an initial uplink pathloss for a first uplink TCI state activated by the TCI state activation MAC-CE, and an initial uplink pathloss for a second uplink TCI state activated by the TCI state activation MAC-CE, where the initial uplink pathloss value for both uplink TCI states is 50 dB in accordance with the TCI state activation MAC-CE indicating the initial pathloss offset value of 40 dB relative to the downlink pathloss value of 90 dB.
[0113] Accordingly, when the network node subsequently transmits a beam indication DCI message that includes an uplink TCI state indication and a corresponding pathloss offset value, the UE may apply the pathloss offset value indicated in the beam indication DCI message to a reference uplink pathloss that is determined in accordance with the initial uplink pathloss for the indicated uplink TCI state. For example, in cases where the beam indication DCI message indicates one uplink TCI state, the UE may derive the uplink pathloss for the indicated uplink TCI state in accordance with the pathloss offset indicated in the beam indication DCI message and the reference uplink pathloss. Alternatively, in cases where the beam indication DCI message indicates two uplink TCI states, the UE may derive the uplink pathloss for the first indicated uplink TCI state in accordance with the pathloss offset associated with the first indicated uplink TCI state and a reference uplink pathloss associated with the first indicated uplink TCI state and may derive the uplink pathloss for the second indicated uplink TCI state in accordance with the pathloss offset associated with the second indicated uplink TCI state and a reference uplink pathloss associated with the second indicated uplink TCI state. In some aspects, the reference uplink pathloss may correspond to the initial uplink pathloss determined from the initial pathloss offset indicated in the TCI state activation MAC-CE for the same uplink TCI state or the previous (most recent) uplink pathloss associated with the same uplink TCI state.
[0114] For example, in the scenario 650 shown in Figure 6D, the network node may transmit, and the UE may receive, a first beam indication DCI message that indicates a pathloss offset associated with a first uplink TCI state, with a value of -10 dB. As described herein, the pathloss offset indicated in the first beam indication DCI message is applied to a reference uplink pathloss associated with the first uplink TCI state, where the reference uplink pathloss is the initial uplink pathloss associated with the first uplink TCI state because the first beam indication DCI message is the first pathloss offset indication subsequent to the TCI state activation MAC-CE (for example, the initial uplink pathloss associated with the first uplink TCI state is also the previous or most recent pathloss uplink pathloss associated with the first uplink TCI state) . Accordingly, the pathloss offset indicated in the first beam indication DCI message is applied to the reference (initial) uplink pathloss associated with the first uplink TCI state. In particular, as shown, the uplink pathloss associated with the first uplink state, which is associated with a first uplink communication when the first uplink TCI state applies, is given by which equals 40 dB.
[0115] As further shown in Figure 6D, the network node may subsequently transmit, and the UE may receive, a second beam indication DCI message that indicates a pathloss offset associated with a second uplink TCI state, with a value of 10 dB. As described herein, the pathloss offset indicated in the second beam indication DCI message is applied to a reference uplink pathloss associated with the second uplink TCI state, where the reference uplink pathloss is the initial uplink pathloss associated with the second uplink TCI state (for example, because the initial uplink pathloss associated with the second uplink TCI state is also the previous or most recent pathloss uplink pathloss associated with the second uplink TCI state) . Accordingly, the pathloss offset indicated in the second beam indication DCI message is applied to the reference (initial) uplink pathloss associated with the second uplink TCI state. In particular, as shown, the uplink pathloss associated with the second uplink state, which is associated with a second uplink communication when the second uplink TCI state applies, is given by which equals 60 dB.
[0116] As further shown in Figure 6D, the network node may subsequently transmit, and the UE may receive, a third beam indication DCI message that indicates a pathloss offset associated with the first uplink TCI state, In this case, however, the initial uplink pathloss associated with the first uplink TCI state is not the previous or most recent pathloss uplink pathloss associated with the first uplink TCI state (for example, the initial uplink pathloss associated with the first uplink TCI state was updated in accordance with the pathloss offset indicated in the first beam indication DCI message) . Accordingly, in cases where the reference uplink pathloss is the initial uplink pathloss, the pathloss offset indicated in the third beam indication DCI message may have a value of –5db, such that the uplink pathloss associated with the first uplink state, which is associated with a third uplink communication when the first uplink TCI state applies, is given by which equals 45 dB. Alternatively, in cases where the reference uplink pathloss is the previous or most recent uplink pathloss associated with the same uplink TCI state, the pathloss offset indicated in the third beam indication DCI message may have a value of +5db, such that the uplink pathloss associated with the first uplink state, which is associated with a third uplink communication when the first uplink TCI state applies, is given by which equals 45 dB.
[0117] Additionally or alternatively, in cases where the power control parameter in the beam indication DCI message is a TPC command for closed-loop power control, the TPC command may be associated with a first type that differs from a second type associated with a TPC command used for closed-loop power control for a PUCCH in response to the beam indication DCI message (for example, a PUCCH carrying HARQ-ACK feedback for the beam indication DCI message) . In particular, the TPC command associated with the first type (for uplink power control associated with an uplink TCI state) may be used for closed-loop power control for one or more uplink signals and / or uplink channels that are transmitted using the indicated uplink TCI state. Furthermore, in some aspects, the TPC command associated with the first type may be separately applied to different uplink signals and / or uplink channels (for example, a PUSCH, PUCCH, and / or an SRS) . For example, an uplink TCI state indicated in the beam indication DCI message may be associated with a respective closed-loop index, l, for each uplink signal and / or uplink channel, and the TPC command may apply to each uplink signal and / or uplink channel according to the corresponding closed-loop index. For example, when an uplink TCI state indicated in a beam activation DCI message is associated with l=0 for a PUSCH, l=1 for a PUCCH, and l=0 for SRS, the TPC command may separately apply to a closed-loop index with l=0 for a PUSCH, a closed-loop index with l=1 for a PUCCH, and a closed-loop index with l=0 for an SRS.
[0118] For example, Figure 6E illustrates an example scenario 660 where a beam indication DCI message indicates a TPC command to be applied to a closed-loop index associated with a PUSCH. For example, as shown, the network node may transmit, and the UE may receive, a beam indication DCI message with a first TPC command that is applied to a closed-loop index of 0, where the first TPC command is δ0 (0) = -20dB. As further shown, the network node may subsequently transmit, in the scheduling DCI message, a second TPC command applied to the closed-loop index of 0, where the second TPC command is δ1 (0) = +3. Accordingly, when the UE transmits a first PUSCH associated with the closed-loop index of 0 using the first uplink TCI state, the UE accumulates the first TPC command and the second TPC command associated with the first uplink TCI state such that the first PUSCH is transmitted with an accumulated closed loop transmit power of -17 dB. As further shown, the network node may subsequently transmit a third TPC command applied to the closed-loop index of 0, where the third TPC command is δ2 (0) = +1. Accordingly, when the UE transmits a second PUSCH associated with the closed-loop index of 0 using the first uplink TCI state, the UE accumulates the first, second, and third TPC command associated with the first uplink TCI state such that the second PUSCH is transmitted with an accumulated closed loop transmit power of -16 dB. Furthermore, if the network node subsequently transmits a second beam indication DCI message with a first TPC command that is applied to a closed-loop index of 1, where the first TPC command is δ0 (1) = -30dB, the UE may apply the TPC command to any PUSCH (s) associated with the uplink TCI state that have a closed-loop index of 1. For example, the network node may subsequently transmit a second TPC command applied to the closed-loop index of 1, where the second TPC command is δ1 (1) = -1. Accordingly, when the UE transmits a PUSCH associated with the closed-loop index of 1 using the uplink TCI state indicated in the second beam indication DCI message, the UE accumulates the first TPC command and the second TPC command associated with the indicated uplink TCI state such that the PUSCH is transmitted with an accumulated closed loop transmit power of -31 dB.
[0119] Accordingly, as shown in Figure 6A, in a third operation 670, the UE may transmit an uplink communication to one or more uplink-only nodes using the uplink TCI state (s) indicated in the beam indication DCI message. Furthermore, as described herein, the uplink communication may be transmitted using a transmit power associated with the power control parameter indicated in the beam indication DCI message. For example, in cases where the beam indication DCI message indicates one uplink TCI state (for example, the beam activation DCI message includes one joint TCI state indication or one separate uplink TCI state indication) , the UE may apply the power control parameter indicated in the beam indication DCI message to the indicated uplink TCI state using the techniques described in further detail above. Alternatively, in cases where the beam indication DCI message indicates multiple uplink TCI states for uplink mTRP operation (for example, the beam activation DCI message includes two joint TCI state indications, one uplink TCI state indication and one joint TCI state indication, or two uplink TCI state indications) , the beam indication DCI message may indicate separate power control parameters for the respective uplink TCI states or a common power control parameters for both uplink TCI states. Accordingly, the UE may apply the separate power control parameters to the respective uplink TCI states or apply the common power control parameters to both uplink TCI states to determine the transmit power to be used when transmitting the uplink communication to the uplink-only nodes.
[0120] Figure 7 is a flowchart illustrating an example process 700 performed, for example, at a UE or an apparatus of a UE that supports wireless communication in accordance with the present disclosure. Example process 700 is an example where the apparatus or the UE (for example, UE 120) performs operations associated with uplink power control for an uplink-only network node.
[0121] As shown in Figure 7, in some aspects, process 700 may include receiving, from a first network node, a beam indication DCI message indicating an uplink TCI state and a power control parameter associated with the uplink TCI state (block 710) . For example, the UE (such as by using communication manager 140 or reception component 802, depicted in Figure 8) may receive, from a first network node, a beam indication DCI message indicating an uplink TCI state and a power control parameter associated with the uplink TCI state, as described above.
[0122] As further shown in Figure 7, in some aspects, process 700 may include transmitting, to the first network node or a second network node, an uplink communication using the uplink TCI state and a transmit power associated with the power control parameter (block 720) . For example, the UE (such as by using communication manager 140 or transmission component 804, depicted in Figure 8) may transmit, to the first network node or a second network node, an uplink communication using the uplink TCI state and a transmit power associated with the power control parameter, as described above.
[0123] Process 700 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.
[0124] In a first additional aspect, the power control parameter includes a pathloss offset applied to a reference pathloss associated with the uplink TCI state.
[0125] In a second additional aspect, alone or in combination with the first aspect, the reference pathloss is a downlink pathloss measured in accordance with a PLRS associated with the uplink TCI state.
[0126] In a third additional aspect, alone or in combination with one or more of the first and second aspects, the reference pathloss is a downlink pathloss associated with a reference PLRS associated with a lowest or a highest PLRS identifier among one or more PLRSs associated with a set of activated TCI states, a lowest or a highest downlink pathloss value among the one or more PLRSs associated with the set of activated TCI states, or a lowest or a highest TCI state identifier in the set of activated TCI states.
[0127] In a fourth additional aspect, alone or in combination with one or more of the first through third aspects, process 700 includes receiving a TCI state activation MAC-CE that indicates one or more pathloss offset values relative to a downlink pathloss, wherein the reference pathloss is an uplink pathloss associated with the downlink pathloss and the pathloss offset value associated with the uplink TCI state indicated in the TCI state activation MAC-CE.
[0128] In a fifth additional aspect, alone or in combination with one or more of the first through fourth aspects, the downlink pathloss is associated with a PLRS associated with the uplink TCI state.
[0129] In a sixth additional aspect, alone or in combination with one or more of the first through fifth aspects, the downlink pathloss is associated with a reference PLRS associated with a lowest or a highest PLRS identifier among one or more PLRSs associated with a set of activated TCI states.
[0130] In a seventh additional aspect, alone or in combination with one or more of the first through sixth aspects, the downlink pathloss is associated with a reference PLRS associated with a lowest or a highest downlink pathloss value among one or more PLRSs measured in accordance with one or more PLRSs associated with a set of activated TCI states.
[0131] In an eighth additional aspect, alone or in combination with one or more of the first through seventh aspects, the downlink pathloss is associated with a reference PLRS associated with a lowest or a highest TCI state identifier in a set of activated TCI states.
[0132] In a ninth additional aspect, alone or in combination with one or more of the first through eighth aspects, the pathloss offset indicated in the beam indication DCI message is applied to an initial value of the uplink pathloss for the uplink TCI state associated with the pathloss offset.
[0133] In a tenth additional aspect, alone or in combination with one or more of the first through ninth aspects, the pathloss offset indicated in the beam indication DCI message is applied to a most recent value of the uplink pathloss for the uplink TCI state associated with the pathloss offset.
[0134] In an eleventh additional aspect, alone or in combination with one or more of the first through tenth aspects, the power control parameter includes a pathloss scaling factor applied to a reference pathloss associated with the uplink TCI state.
[0135] In a twelfth additional aspect, alone or in combination with one or more of the first through eleventh aspects, the reference pathloss is a downlink pathloss associated with a PLRS associated with the uplink TCI state.
[0136] In a thirteenth additional aspect, alone or in combination with one or more of the first through twelfth aspects, the reference pathloss is a downlink pathloss associated with a reference PLRS associated with a lowest or a highest PLRS identifier among one or more PLRSs associated with a set of activated TCI states, a lowest or a highest downlink pathloss value among the one or more PLRSs associated with the set of activated TCI states, or a lowest or a highest TCI state identifier in the set of activated TCI states.
[0137] In a fourteenth additional aspect, alone or in combination with one or more of the first through thirteenth aspects, the power control parameter includes a TPC command applied to a closed-loop index associated with the uplink TCI state.
[0138] In a fifteenth additional aspect, alone or in combination with one or more of the first through fourteenth aspects, the closed-loop index is associated with an uplink channel or an uplink signal corresponding to the uplink communication that is transmitted using the uplink TCI state.
[0139] In a sixteenth additional aspect, alone or in combination with one or more of the first through fifteenth aspects, the beam indication DCI message includes a field that indicates a codepoint associated with a value of the power control parameter.
[0140] In a seventeenth additional aspect, alone or in combination with one or more of the first through sixteenth aspects, process 700 includes receiving, from the first network node, a RRC message that configures a set of candidate values for the power control parameter, wherein the beam indication DCI message includes a field that indicates a codepoint associated with a candidate value in the set of candidate values for the power control parameter.
[0141] In an eighteenth additional aspect, alone or in combination with one or more of the first through seventeenth aspects, the uplink TCI state is a first uplink TCI state, the beam indication DCI message indicates a second uplink TCI state, and the set of candidate values for the power control parameter is associated with the first uplink TCI state and the second uplink TCI state.
[0142] In a nineteenth additional aspect, alone or in combination with one or more of the first through eighteenth aspects, the uplink TCI state is a first uplink TCI state, the beam indication DCI message indicates a second uplink TCI state, the set of candidate values for the power control parameter is a first set of candidate values associated with the first uplink TCI state, and the RRC message indicates a second set of candidate values for the power control parameter for the second uplink TCI state.
[0143] In a twentieth additional aspect, alone or in combination with one or more of the first through nineteenth aspects, the uplink TCI state is a first uplink TCI state, the power control parameter is a first power control parameter indicated in a first field associated with the first uplink TCI state, the beam indication DCI message indicates a second uplink TCI state and a second power control parameter associated with the second uplink TCI state, and the second power control parameter is indicated in a second field associated with the second uplink TCI state.
[0144] In a twenty-first additional aspect, alone or in combination with one or more of the first through twentieth aspects, the uplink TCI state is a first uplink TCI state, the beam indication DCI message indicates a second uplink TCI state, and the power control parameter is indicated in a field associated with the first uplink TCI state and the second uplink TCI state.
[0145] Although Figure 7 shows example blocks of process 700, in some aspects, process 700 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Figure 7. Additionally or alternatively, two or more of the blocks of process 700 may be performed in parallel.
[0146] Figure 8 is a diagram of an example apparatus 800 for wireless communication that supports wireless communication in accordance with the present disclosure. The apparatus 800 may be a UE, or a UE may include the apparatus 800. In some aspects, the apparatus 800 includes a reception component 802, a transmission component 804, and a communication manager 140, which may be in communication with one another (for example, via one or more buses) . As shown, the apparatus 800 may communicate with another apparatus 806 (such as a UE, a network node, or another wireless communication device) using the reception component 802 and the transmission component 804.
[0147] In some aspects, the apparatus 800 may be configured to and / or operable to perform one or more operations described herein in connection with Figures 6A-6E. Additionally or alternatively, the apparatus 800 may be configured to and / or operable to perform one or more processes described herein, such as process 700 of Figure 7. In some aspects, the apparatus 800 may include one or more components of the UE described above in connection with Figure 2.
[0148] The reception component 802 may receive communications, such as reference signals, control information, and / or data communications, from the apparatus 806. The reception component 802 may provide received communications to one or more other components of the apparatus 800, such as the communication manager 140. In some aspects, the reception component 802 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components. In some aspects, the reception component 802 may include one or more antennas, one or more modems, one or more demodulators, one or more MIMO detectors, one or more receive processors, one or more controllers / processors, and / or one or more memories of the UE described above in connection with Figure 2.
[0149] The transmission component 804 may transmit communications, such as reference signals, control information, and / or data communications, to the apparatus 806. In some aspects, the communication manager 140 may generate communications and may transmit the generated communications to the transmission component 804 for transmission to the apparatus 806. In some aspects, the transmission component 804 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 806. In some aspects, the transmission component 804 may include one or more antennas, one or more modems, one or more modulators, one or more transmit MIMO processors, one or more transmit processors, one or more controllers / processors, and / or one or more memories of the UE described above in connection with Figure 2. In some aspects, the transmission component 804 may be co-located with the reception component 802 in one or more transceivers.
[0150] The communication manager 140 may receive or may cause the reception component 802 to receive, from a first network node, a beam indication DCI message indicating an uplink TCI state and a power control parameter associated with the uplink TCI state. The communication manager 140 may transmit or may cause the transmission component 804 to transmit, to the first network node or a second network node, an uplink communication using the uplink TCI state and a transmit power associated with the power control parameter. In some aspects, the communication manager 140 may perform one or more operations described elsewhere herein as being performed by one or more components of the communication manager 140.
[0151] The communication manager 140 may include one or more controllers / processors and / or one or more memories of the UE described above in connection with Figure 2. In some aspects, the communication manager 140 includes a set of components, such as a transmit power calculation component 808. Alternatively, the set of components may be separate and distinct from the communication manager 140. In some aspects, one or more components of the set of components may include or may be implemented within one or more controllers / processors and / or one or more memories of the UE described above in connection with Figure 2. Additionally or alternatively, one or more components of the set of components may be implemented at least in part as software stored in one or more memories. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the functions or operations of the component.
[0152] The reception component 802 may receive, from a first network node, a beam indication DCI message indicating an uplink TCI state and a power control parameter associated with the uplink TCI state. The transmit power calculation component 808 may calculate an uplink transmit power associated with the power control parameter. The transmission component 804 may transmit, to the first network node or a second network node, an uplink communication using the uplink TCI state and the transmit power associated with the power control parameter.
[0153] The number and arrangement of components shown in Figure 8 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 8. Furthermore, two or more components shown in Figure 8 may be implemented within a single component, or a single component shown in Figure 8 may be implemented as multiple, distributed components. Additionally or alternatively, a set of (one or more) components shown in Figure 8 may perform one or more functions described as being performed by another set of components shown in Figure 8.
[0154] The following provides an overview of some Aspects of the present disclosure:
[0155] Aspect 1: A method of wireless communication performed by a UE, comprising: receiving, from a first network node, a beam indication DCI message indicating an uplink TCI state and a power control parameter associated with the uplink TCI state; and transmitting, to the first network node or a second network node, an uplink communication using the uplink TCI state and a transmit power associated with the power control parameter.
[0156] Aspect 2: The method of Aspect 1, wherein the power control parameter includes a pathloss offset applied to a reference pathloss associated with the uplink TCI state.
[0157] Aspect 3: The method of Aspect 2, wherein the reference pathloss is a downlink pathloss measured in accordance with a PLRS associated with the uplink TCI state.
[0158] Aspect 4: The method of Aspect 2, wherein the reference pathloss is a downlink pathloss associated with a reference PLRS associated with a lowest or a highest PLRS identifier among one or more PLRSs associated with a set of activated TCI states, a lowest or a highest downlink pathloss value among the one or more PLRSs associated with the set of activated TCI states, or a lowest or a highest TCI state identifier in the set of activated TCI states.
[0159] Aspect 5: The method of Aspect 2, further comprising: receiving a TCI state activation MAC-CE that indicates one or more pathloss offset values relative to a downlink pathloss, wherein the reference pathloss is an uplink pathloss associated with the downlink pathloss and the pathloss offset value associated with the uplink TCI state indicated in the TCI state activation MAC-CE.
[0160] Aspect 6: The method of Aspect 5, wherein the downlink pathloss is associated with a PLRS associated with the uplink TCI state.
[0161] Aspect 7: The method of Aspect 5, wherein the downlink pathloss is associated with a reference PLRS associated with a lowest or a highest PLRS identifier among one or more PLRSs associated with a set of activated TCI states.
[0162] Aspect 8: The method of Aspect 5, wherein the downlink pathloss is associated with a reference PLRS associated with a lowest or a highest downlink pathloss value among one or more downlink pathloss values measured in accordance with one or more PLRSs associated with a set of activated TCI states.
[0163] Aspect 9: The method of Aspect 5, wherein the downlink pathloss is associated with a reference PLRS associated with a lowest or a highest TCI state identifier in a set of activated TCI states.
[0164] Aspect 10: The method of Aspect 5, wherein the pathloss offset indicated in the beam indication DCI message is applied to an initial value of the uplink pathloss for the uplink TCI state associated with the pathloss offset.
[0165] Aspect 11: The method of Aspect 5, wherein the pathloss offset indicated in the beam indication DCI message is applied to a most recent value of the uplink pathloss for the uplink TCI state associated with the pathloss offset.
[0166] Aspect 12: The method of any of Aspects 1-11, wherein the power control parameter includes a pathloss scaling factor applied to a reference pathloss associated with the uplink TCI state.
[0167] Aspect 13: The method of Aspect 12, wherein the reference pathloss is a downlink pathloss associated with a PLRS associated with the uplink TCI state.
[0168] Aspect 14: The method of Aspect 12, wherein the reference pathloss is a downlink pathloss associated with a reference PLRS associated with a lowest or a highest PLRS identifier among one or more PLRSs associated with a set of activated TCI states, a lowest or a highest downlink pathloss value among the one or more PLRSs associated with the set of activated TCI states, or a lowest or a highest TCI state identifier in the set of activated TCI states.
[0169] Aspect 15: The method of any of Aspects 1-14, wherein the power control parameter includes a TPC command applied to a closed-loop index associated with the uplink TCI state.
[0170] Aspect 16: The method of Aspect 15, wherein the closed-loop index is associated with an uplink channel or an uplink signal corresponding to the uplink communication that is transmitted using the uplink TCI state.
[0171] Aspect 17: The method of any of Aspects 1-16, wherein the beam indication DCI message includes a field that indicates a codepoint associated with a value of the power control parameter.
[0172] Aspect 18: The method of any of Aspects 1-17, further comprising: receiving, from the first network node, a RRC message that configures a set of candidate values for the power control parameter, wherein the beam indication DCI message includes a field that indicates a codepoint associated with a candidate value in the set of candidate values for the power control parameter.
[0173] Aspect 19: The method of Aspect 18, wherein: the uplink TCI state is a first uplink TCI state, the beam indication DCI message indicates a second uplink TCI state, and the set of candidate values for the power control parameter is associated with the first uplink TCI state and the second uplink TCI state.
[0174] Aspect 20: The method of Aspect 18, wherein: the uplink TCI state is a first uplink TCI state, the beam indication DCI message indicates a second uplink TCI state, the set of candidate values for the power control parameter is a first set of candidate values associated with the first uplink TCI state, and the RRC message indicates a second set of candidate values for the power control parameter for the second uplink TCI state.
[0175] Aspect 21: The method of any of Aspects 1-20, wherein: the uplink TCI state is a first uplink TCI state, the power control parameter is a first power control parameter indicated in a first field associated with the first uplink TCI state, the beam indication DCI message indicates a second uplink TCI state and a second power control parameter associated with the second uplink TCI state, and the second power control parameter is indicated in a second field associated with the second uplink TCI state.
[0176] Aspect 22: The method of any of Aspects 1-21, wherein: the uplink TCI state is a first uplink TCI state, the beam indication DCI message indicates a second uplink TCI state, and the power control parameter is indicated in a field associated with the first uplink TCI state and the second uplink TCI state.
[0177] Aspect 23: 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 1-22.
[0178] Aspect 24: 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 1-22.
[0179] Aspect 25: An apparatus for wireless communication, the apparatus comprising at least one means for performing the method of one or more of Aspects 1-22.
[0180] Aspect 26: 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 1-22.
[0181] Aspect 27: 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 1-22.
[0182] Aspect 28: 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 1-22.
[0183] Aspect 29: 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 1-22.
[0184] 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.
[0185] As used herein, the term “component” is intended to be broadly construed as hardware or a combination of hardware and at least one of software or firmware. “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. As used herein, a “processor” is implemented in hardware or a combination of hardware and software. 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 code 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.
[0186] 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.
[0187] 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) .
[0188] No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more. ” 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 similar language is used. Also, as used herein, the terms “has, ” “have, ” “having, ” and 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) . Further, the phrase “based on” is intended to mean “based on or otherwise in association with” unless explicitly stated otherwise. 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” ) . It should be understood that “one or more” is equivalent to “at least one. ”
[0189] Even though particular combinations of features are recited in the claims or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. 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.A user equipment (UE) for wireless communication, 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 UE to:receive, from a first network node, a beam indication downlink control information (DCI) message indicating an uplink transmission configuration indication (TCI) state and a power control parameter associated with the uplink TCI state; andtransmit, to the first network node or a second network node, an uplink communication using the uplink TCI state and a transmit power associated with the power control parameter.2.The UE of claim 1, wherein the power control parameter includes a pathloss offset applied to a reference pathloss associated with the uplink TCI state.3.The UE of claim 2, wherein the reference pathloss is a downlink pathloss measured in accordance with a pathloss reference signal (PLRS) associated with the uplink TCI state.4.The UE of claim 2, wherein the reference pathloss is a downlink pathloss associated with a reference pathloss reference signal (PLRS) associated with a lowest or a highest PLRS identifier among one or more PLRSs associated with a set of activated TCI states, a lowest or a highest downlink pathloss value among one or more downlink pathloss values measured in accordance with the one or more PLRSs associated with the set of activated TCI states , or a lowest or a highest TCI state identifier in the set of activated TCI states.5.The UE of claim 2, wherein the processing system is further configured to cause the UE to:receive a TCI state activation medium access control (MAC) control element (MAC-CE) that indicates one or more pathloss offset values relative to a downlink pathloss, wherein the reference pathloss is an uplink pathloss associated with the downlink pathloss and the pathloss offset value associated with the uplink TCI state indicated in the TCI state activation MAC-CE.6.The UE of claim 5, wherein the downlink pathloss is associated with a pathloss reference signal (PLRS) associated with the uplink TCI state.7.The UE of claim 5, wherein the downlink pathloss is associated with a reference pathloss reference signal (PLRS) associated with a lowest or a highest PLRS identifier among one or more PLRSs associated with a set of activated TCI states.8.The UE of claim 5, wherein the downlink pathloss is associated with a reference pathloss reference signal (PLRS) associated with a lowest or a highest downlink pathloss value among one or more downlink pathloss values measured in accordance with one or more PLRSs associated with a set of activated TCI states.9.The UE of claim 5, wherein the downlink pathloss is associated with a reference pathloss reference signal (PLRS) associated with a lowest or a highest TCI state identifier in a set of activated TCI states.10.The UE of claim 5, wherein the pathloss offset indicated in the beam indication DCI message is applied to an initial value of the uplink pathloss for the uplink TCI state associated with the pathloss offset.11.The UE of claim 5, wherein the pathloss offset indicated in the beam indication DCI message is applied to a most recent value of the uplink pathloss for the uplink TCI state associated with the pathloss offset.12.The UE of claim 1, wherein the power control parameter includes a pathloss scaling factor applied to a reference pathloss associated with the uplink TCI state.13.The UE of claim 12, wherein the reference pathloss is a downlink pathloss associated with a pathloss reference signal (PLRS) associated with the uplink TCI state.14.The UE of claim 12, wherein the reference pathloss is a downlink pathloss associated with a reference pathloss reference signal (PLRS) associated with a lowest or a highest PLRS identifier among one or more PLRSs associated with a set of activated TCI states, a lowest or a highest downlink pathloss value among one or more downlink pathloss values measured in accordance with the one or more PLRSs associated with the set of activated TCI states, or a lowest or a highest TCI state identifier in the set of activated TCI states.15.The UE of claim 1, wherein the power control parameter includes a transmit power control (TPC) command applied to a closed-loop index associated with the uplink TCI state.16.The UE of claim 15, wherein the closed-loop index is associated with an uplink channel or an uplink signal corresponding to the uplink communication that is transmitted using the uplink TCI state.17.The UE of claim 1, wherein the beam indication DCI message includes a field that indicates a codepoint associated with a value of the power control parameter.18.The UE of claim 1, wherein the processing system is further configured to cause the UE to:receive, from the first network node, a radio resource control (RRC) message that configures a set of candidate values for the power control parameter, wherein the beam indication DCI message includes a field that indicates a codepoint associated with a candidate value in the set of candidate values for the power control parameter.19.The UE of claim 18, wherein:the uplink TCI state is a first uplink TCI state,the beam indication DCI message indicates a second uplink TCI state, andthe set of candidate values for the power control parameter is associated with the first uplink TCI state and the second uplink TCI state.20.The UE of claim 18, wherein:the uplink TCI state is a first uplink TCI state,the beam indication DCI message indicates a second uplink TCI state,the set of candidate values for the power control parameter is a first set of candidate values associated with the first uplink TCI state, andthe RRC message indicates a second set of candidate values for the power control parameter for the second uplink TCI state.21.The UE of claim 1, wherein:the uplink TCI state is a first uplink TCI state,the power control parameter is a first power control parameter indicated in a first field associated with the first uplink TCI state,the beam indication DCI message indicates a second uplink TCI state and a second power control parameter associated with the second uplink TCI state, andthe second power control parameter is indicated in a second field associated with the second uplink TCI state.22.The UE of claim 1, wherein:the uplink TCI state is a first uplink TCI state,the beam indication DCI message indicates a second uplink TCI state, andthe power control parameter is indicated in a field associated with the first uplink TCI state and the second uplink TCI state.23.A method of wireless communication performed by a user equipment (UE) , comprising:receiving, from a first network node, a beam indication downlink control information (DCI) message indicating an uplink transmission configuration indication (TCI) state and a power control parameter associated with the uplink TCI state; andtransmitting, to the first network node or a second network node, an uplink communication using the uplink TCI state and a transmit power associated with the power control parameter.24.The method of claim 23, wherein the power control parameter includes a pathloss offset applied to a reference pathloss associated with the uplink TCI state.25.The method of claim 23, wherein the power control parameter includes a pathloss scaling factor applied to a reference pathloss associated with the uplink TCI state.26.The method of claim 23, wherein the power control parameter includes a transmit power control (TPC) command applied to a closed-loop index associated with the uplink TCI state.27.The method of claim 23, wherein the beam indication DCI message includes a field that indicates a codepoint associated with a value of the power control parameter.28.The method of claim 23, further comprising:receiving, from the first network node, a radio resource control (RRC) message that configures a set of candidate values for the power control parameter, wherein the beam indication DCI message includes a field that indicates a codepoint associated with a candidate value in the set of candidate values for the power control parameter.29.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 user equipment (UE) , cause the UE to:receive, from a first network node, a beam indication downlink control information (DCI) message indicating an uplink transmission configuration indication (TCI) state and a power control parameter associated with the uplink TCI state; andtransmit, to the first network node or a second network node, an uplink communication using the uplink TCI state and a transmit power associated with the power control parameter.30.An apparatus for wireless communication, comprising:means for receiving, from a first network node, a beam indication downlink control information (DCI) message indicating an uplink transmission configuration indication (TCI) state and a power control parameter associated with the uplink TCI state; andmeans for transmitting, to the first network node or a second network node, an uplink communication using the uplink TCI state and a transmit power associated with the power control parameter.
Citation Information
Patent Citations
Method and apparatus for determining sending parameter, method and apparatus for determining sending power, method and apparatus for determining PHR, and storage medium
US20230110740A1
Power control parameter determining method and apparatus
US20240049143A1
Power control indication using sounding reference signal resource indicators
WO2022204848A1