Channel state information change reporting
By reporting CSI change information, UE enhances network condition management in wireless communication systems, enabling accurate adjustments and improved CSI through instantaneous interference metrics.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- QUALCOMM INC
- Filing Date
- 2025-01-24
- Publication Date
- 2026-07-30
AI Technical Summary
Wireless communication systems face challenges in accurately determining the reason for changes in channel state information (CSI), leading to suboptimal network condition adjustments and reliance on average interference metrics instead of instantaneous measurements.
User equipment (UE) measures multiple CSI-RS occasions to determine CSI changes and reports difference information to the network node, enabling the node to adjust modulation and coding schemes and improve network conditions.
Enhances network condition management by allowing the network node to use change information for outer loop control and scheduling, improving CSI through instantaneous interference metrics.
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Figure CN2025074675_30072026_PF_FP_ABST
Abstract
Description
CHANNEL STATE INFORMATION CHANGE REPORTINGFIELD OF THE DISCLOSURE
[0001] Aspects of the present disclosure generally relate to wireless communication and specifically relate to techniques, apparatuses, and methods associated with reporting a difference between channel state information values.BACKGROUND
[0002] Wireless communication systems are widely deployed to provide various services, which may involve carrying or supporting voice, text, other messaging, video, data, and / or other traffic. Typical wireless communication systems may employ multiple-access radio access technologies (RATs) capable of supporting communication among multiple wireless communication devices including user devices or other devices by sharing the available system resources (for example, time domain resources, frequency domain resources, spatial domain resources, and / or device transmit power, among other examples) . Such multiple-access RATs are supported by technological advancements that have been adopted in various telecommunication standards, which define common protocols that enable different wireless communication devices to communicate on a local, municipal, national, regional, or global level.
[0003] An example telecommunication standard is New Radio (NR) . NR, which may also be referred to as 5G, is part of a continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) . NR (and other RATs beyond NR) may be designed to better support enhanced mobile broadband (eMBB) access, Internet of things (IoT) networks or reduced capability device deployments, and ultra-reliable low latency communication (URLLC) applications. To support these verticals, NR systems may be designed to implement a modularized functional infrastructure, a disaggregated and service-based network architecture, network function virtualization, network slicing, multi-access edge computing, millimeter wave (mmWave) technologies including massive multiple-input multiple-output (MIMO) , licensed and unlicensed spectrum access, non-terrestrial network (NTN) deployments, sidelink and other device-to-device direct communication technologies (for example, cellular vehicle-to-everything (CV2X) communication) , multiple-subscriber implementations, high-precision positioning, and / or radio frequency (RF) sensing, among other examples. As the demand for connectivity continues to increase, further improvements in NR may be implemented, and other RATs, such as 6G and beyond, may be introduced to enable new applications and facilitate new use cases.
[0004] Channel state information (CSI) is data that describes the properties or conditions of a communication channel in a wireless communication system. CSI may include, for example, information about channel quality, signal-to-noise ratio (SNR) , interference levels, channel fading, channel gain, or other characteristics that may affect the transmission of signals between a transmitter and a receiver. CSI may be used to improve various aspects of wireless communication, including modulation, coding, beamforming, resource allocation, or scheduling. CSI may be generated, updated, or transmitted by a user equipment, a base station, a network node, or other network entities, and may be used in closed-loop or open-loop communication schemes.SUMMARY
[0005] Some aspects described herein relate to a user equipment (UE) for wireless communication. The UE may include one or more memories and one or more processors coupled to the one or more memories. The one or more processors may be configured to receive one or more channel measurement resources or one or more interference measurement resources. The one or more processors may be configured to transmit a channel state information (CSI) report that includes change information associated with a difference between a CSI value relative to a reference value.
[0006] Some aspects described herein relate to a network node for wireless communication. The network node may include one or more memories and one or more processors coupled to the one or more memories. The one or more processors may be configured to transmit one or more channel measurement resources or one or more interference measurement resources. The one or more processors may be configured to receive, from a UE, a CSI report that includes change information associated with a difference between a CSI value and a reference value.
[0007] Some aspects described herein relate to a method of wireless communication performed by a UE. The method may include receiving one or more channel measurement resources or one or more interference measurement resources. The method may include transmitting a CSI report that includes change information associated with a difference between a CSI value and a reference value.
[0008] Some aspects described herein relate to a method of wireless communication performed by a network node. The method may include transmitting one or more channel measurement resources or one or more interference measurement resources. The method may include receiving, from a UE, a CSI report that includes change information associated with a difference between a CSI value and a reference value.
[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 one or more channel measurement resources or one or more interference measurement resources. The set of instructions, when executed by one or more processors of the UE, may cause the UE to transmit a CSI report that includes change information associated with a difference between a CSI value and a reference value.
[0010] Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a network node. The set of instructions, when executed by one or more processors of the network node, may cause the network node to transmit one or more channel measurement resources or one or more interference measurement resources. The set of instructions, when executed by one or more processors of the network node, may cause the network node to receive, from a UE, a CSI report that includes change information associated with a difference between a CSI value and a reference value.
[0011] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving one or more channel measurement resources or one or more interference measurement resources. The apparatus may include means for transmitting a CSI report that includes change information associated with a difference between a CSI value and a reference value.
[0012] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for transmitting one or more channel measurement resources or one or more interference measurement resources. The apparatus may include means for receiving, from a UE, a CSI report that includes change information associated with a difference between a CSI value and a reference value.
[0013] Aspects of the present disclosure may generally be implemented by or as a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, network node, network entity, wireless communication device, and / or processing system as substantially described with reference to, and as illustrated by, this specification and accompanying drawings.
[0014] 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
[0015] 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.
[0016] Fig. 1 is a diagram illustrating an example of a wireless communication network, in accordance with the present disclosure.
[0017] Fig. 2 is a diagram illustrating an example disaggregated network node architecture, in accordance with the present disclosure.
[0018] Fig. 3 is a diagram illustrating an example associated with a channel state information report that includes change information, in accordance with the present disclosure.
[0019] Fig. 4 is a diagram illustrating an example process performed, for example, at a user equipment (UE) or an apparatus of a UE, in accordance with the present disclosure.
[0020] Fig. 5 is a diagram illustrating an example process performed, for example, at a network node or an apparatus of a network node, in accordance with the present disclosure.
[0021] Fig. 6 is a diagram of an example apparatus for wireless communication, in accordance with the present disclosure.
[0022] Fig. 7 is a diagram of an example apparatus for wireless communication, in accordance with the present disclosure.DETAILED DESCRIPTION
[0023] Various aspects of the present disclosure are described hereinafter with reference to the accompanying drawings. However, aspects of the present disclosure may be embodied in many different forms. The present disclosure is not to be construed as limited to any specific aspect illustrated by or described with reference to an accompanying drawing or otherwise presented in this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. One skilled in the art may appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using various combinations or quantities of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover an apparatus having, or a method that is practiced using, other structures and / or functionalities in addition to or other than the structures and / or functionalities with which various aspects of the disclosure set forth herein may be practiced. Any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.
[0024] 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.
[0025] A user equipment (UE) may measure channel state information (CSI) and transmit the CSI to a network node. The CSI may include, for example, a channel quality indicator (CQI) and / or channel state feedback (CSF) . The UE may measure a CSI reference signal (CSI-RS) and transmit the CSI, which is based on the CSI-RS measurements, to the network node. The UE may measure multiple CSI-RSs and transmit CSI to the network node multiple times over the course of a communication session. Network conditions may change over time, which may affect the CSI. Examples of network conditions that may affect the CSI may include a change in a wireless communication channel, a change in interference affecting the UE and / or the network node, and / or a combination thereof, among other examples. While subsequent instances of CSI may indicate to the network node that network conditions have changed, the network node may not be able to determine what network conditions (e.g., a channel change and / or interference change, among others) caused the CSI to change.
[0026] Accordingly, if the network conditions have degraded, the network node may be unable to improve the network conditions based only on multiple CSI measurements received from the UE. For example, without knowing the reason for the change in the network conditions, the network node may be unable to appropriately adjust outer loop rate control and / or scheduling in a way that may improve the network conditions. Additionally, without knowing the reason for the change in the network conditions, the UE must rely on an average interference metric (e.g., a noise-plus-interference covariance matrix (Rnn) ) , rather than an instantaneous interference, when reporting the CQI to the network node. If the UE is aware of the reason for the change in network conditions, the UE may be able to report the CQI to the network node based on an instantaneous interference metric (e.g., an instantaneous signal-to-information-plus-noise ratio (SINR) ) in addition to, or instead of, an average channel metric and / or an average interference metric when reporting CQI to the network node.
[0027] Various aspects relate generally to CSI measurements. Some aspects more specifically relate to measuring multiple CSI-RS occasions to determine multiple CSI measurements over time. In some aspects, the UE performs multiple measurements in one or more channel measurement resources and / or interference measurement resources and reports the CSI and change information to a network node. The change information may indicate, to the network node, a difference between a particular CSI value and a reference value. The change information may indicate, to the network node, a reason for a change in the CSI (e.g., a reason for the difference between the CSI value as measured by the UE and the reference value) . The network node may use the change information to improve network conditions.
[0028] Particular aspects of the subject matter described in this disclosure can be implemented to realize one or more of the following potential advantages. In some examples, the described techniques can be used to improve network conditions. In some aspects, the network node may use the change information for outer loop control and / or scheduling. In some aspects, the network node may use the change information to adjust a modulation and coding scheme (MCS) used for communication with the UE. By adjusting the MCS and / or by using the change information for outer loop control and / or scheduling, network conditions negatively impacting the CSI may be improved.
[0029] As described above, wireless communication systems may be deployed to provide various services, which may involve carrying or supporting voice, text, other messaging, video, data, and / or other traffic. Some wireless communications systems may employ multiple-access radio access technologies (RATs) . The multiple-access RATs may be capable of supporting communication with multiple wireless communication devices by sharing the available system resources (for example, time domain resources, frequency domain resources, spatial domain resources, and / or device transmit power, among other examples) . Examples of such multiple-access RATs include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.
[0030] Multiple-access RATs are supported by technological advancements that have been adopted in various telecommunication standards, which define common protocols that enable wireless communication devices to communicate on a local, municipal, enterprise, national, regional, or global level. For example, 5G New Radio (NR) is part of a continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) . 5G NR may support enhanced mobile broadband (eMBB) access, Internet of Things (IoT) networks or reduced capability (RedCap) device deployments, ultra-reliable low-latency communication (URLLC) applications, and / or massive machine-type communication (mMTC) , among other examples.
[0031] To support these and other target verticals, a wireless communication system may be designed to implement a modularized functional infrastructure, a disaggregated and service-based network architecture, network function virtualization, network slicing, multi-access edge computing, millimeter wave (mmWave) technologies including massive multiple-input multiple-output (MIMO) , beamforming, IoT device or RedCap device connectivity and management, industrial connectivity, licensed and unlicensed spectrum access, sidelink and other device-to-device direct communication (for example, cellular vehicle-to-everything (CV2X) communication) , frequency spectrum expansion, overlapping spectrum use, small cell deployments, non-terrestrial network (NTN) deployments, device aggregation, advanced duplex communication (for example, sub-band full-duplex (SBFD) ) , multiple-subscriber implementations, high-precision positioning, radio frequency (RF) sensing, network energy savings (NES) , low-power signaling and radios, and / or artificial intelligence or machine learning (AI / ML) , among other examples.
[0032] The foregoing and other technological improvements may support use cases, such as wireless fronthauls, wireless midhauls, wireless backhauls, wireless data centers, extended reality (XR) and metaverse applications, meta services for supporting vehicle connectivity, holographic and mixed reality communication, autonomous and collaborative robots, vehicle platooning and cooperative maneuvering, sensing networks, gesture monitoring, human-brain interfacing, digital twin applications, asset management, and universal coverage applications using non-terrestrial and / or aerial platforms, among other examples.
[0033] As the demand for connectivity continues to increase, further improvements in NR may be implemented, and other RATs, such as 6G and beyond, may be introduced to enable new applications and facilitate new use cases. The methods, operations, apparatuses, and techniques described herein may enable one or more of the foregoing technologies or new technologies and / or support one or more of the foregoing use cases or new use cases.
[0034] Fig. 1 is a diagram illustrating an example of a wireless communication network 100, in accordance with the present disclosure. The wireless communication network 100 may be or may include elements of a 5G (or NR) network or a 6G network, among other examples. The wireless communication network 100 may include multiple network nodes 110. For example, in Fig. 1, the wireless communication network 100 includes a network node (NN) 110a and a network node 110b. The network nodes 110 may support communications with multiple UEs 120. For example, in Fig. 1, the network nodes 110 support communication with a UE 120a, a UE 120b, and a UE 120c. In some examples, a UE 120 may also communicate with other UEs 120 and a network node 110 may communicate with a core network and with other network nodes 110.
[0035] The network nodes 110 and the UEs 120 of the wireless communication network 100 may communicate using the electromagnetic spectrum, which may be subdivided by frequency or wavelength into various classes, bands, carriers, and / or channels. For example, devices of the wireless communication network 100 may communicate using one or more operating bands. In some aspects, multiple wireless communication networks 100 may be deployed in a given geographic area. Each wireless communication network 100 may support a particular RAT (which may also be referred to as an air interface) and may operate on one or more carrier frequencies in one or more frequency bands or ranges. In some examples, when multiple RATs are deployed in a given geographic area, each RAT in the geographic area may operate on different frequencies to avoid interference with other RATs. Additionally or alternatively, in some examples, the wireless communication network 100 may implement dynamic spectrum sharing (DSS) , in which multiple RATs are implemented with dynamic bandwidth allocation (for example, based on user demand) in a single frequency band. In some examples, the wireless communication network 100 may support communication over unlicensed spectrum, where access to an unlicensed channel is subject to a channel access mechanism. For example, in a shared or unlicensed frequency band, a transmitting device may perform a channel access procedure, such as a listen-before-talk (LBT) procedure, to contend against other devices for channel access before transmitting on a shared or unlicensed channel.
[0036] Various operating bands have been defined as frequency range designations FR1 (410 MHz through 7.125 GHz) , FR2 (24.25 GHz through 52.6 GHz) , FR3 (7.125 GHz through 24.25 GHz) , FR4a or FR4-1 (52.6 GHz through 71 GHz) , FR4 (52.6 GHz through 114.25 GHz) , and FR5 (114.25 GHz through 300 GHz) . Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “sub-6 GHz” band in some documents and articles. Similarly, FR2 is often referred to (interchangeably) as a “millimeter wave” band in some documents and articles, despite being different than the extremely high frequency (EHF) band (30 GHz through 300 GHz) , which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band. The frequencies between FR1 and FR2 are often referred to as mid-band frequencies, which include FR3. Frequency bands falling within FR3 may inherit FR1 characteristics or FR2 characteristics, and thus may effectively extend features of FR1 or FR2 into the mid-band frequencies. Thus, “sub-6 GHz, ” if used herein, may broadly refer to frequencies that are less than 6 GHz, that are within FR1, and / or that are included in mid-band frequencies. Similarly, the term “millimeter wave, ” if used herein, may broadly refer to mid-band frequencies or to frequencies that are within FR2, FR4, FR4-a or FR4-1, FR5, and / or the EHF band. Higher frequency bands may extend 5G NR operation, 6G operation, and / or other RATs beyond 52.6 GHz.
[0037] A network node 110 and / or a UE 120 may include one or more devices, components, or systems that enable communication with other devices, components, or systems of the wireless communication network 100. For example, a UE 120 and a network node 110 may each include one or more chips, system-on-chips (SoCs) , chipsets, packages, or devices that individually or collectively constitute or comprise a processing system, such as a processing system 140 of the UE 120 or a processing system 145 of the network node 110. A processing system (for example, the processing system 140 and / or the processing system 145) includes processor (or “processing” ) circuitry in the form of one or multiple processors, microprocessors, processing units (such as central processing units (CPUs) , graphics processing units (GPUs) , neural processing units (NPUs) (also referred to as neural network processors or deep learning processors (DLPs) ) , and / or digital signal processors (DSPs) ) , processing blocks, application-specific integrated circuits (ASICs) , programmable logic devices (PLDs) , or other discrete gate or transistor logic or circuitry (any one or more of which may be generally referred to herein individually as a “processor” or collectively as “the processor” or “the processor circuitry” ) . Such processors may be individually or collectively configurable or configured to perform various functions or operations described herein. A group of processors collectively configurable or configured to perform a set of functions may include a first processor configurable or configured to perform a first function of the set and a second processor configurable or configured to perform a second function of the set. In some other examples, each of a group of processors may be configurable or configured to perform a same set of functions.
[0038] The processing system 140 and the processing system 145 may each include memory circuitry in the form of one or multiple memory devices, memory blocks, memory elements, or other discrete gate or transistor logic or circuitry, each of which may include or implement tangible storage media such as random-access memory (RAM) or read-only memory (ROM) , or combinations thereof (any one or more of which may be generally referred to herein individually as a “memory” or collectively as “the memory” or “the memory circuitry” ) . One or more of the memories may be coupled (for example, operatively coupled, communicatively coupled, electronically coupled, or electrically coupled) with one or more of the processors and may individually or collectively store processor-executable code or instructions (such as software) that, when executed by one or more of the processors, may configure one or more of the processors to perform various functions or operations described herein. Additionally or alternatively, in some examples, one or more of the processors may be configured to perform various functions or operations described herein without requiring configuration by software. “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
[0039] The processing system 140 and the processing system 145 may each include or be coupled with one or more modems (such as a cellular (for example, a 5G or 6G compliant) modem) . In some examples, one or more processors of the processing system 140 and / or the processing system 145 include or implement one or more of the modems. The processing system 140 and the processing system 145 may also include or be coupled with multiple radios (collectively “the radio” ) , multiple RF chains, or multiple transceivers, each of which may in turn be coupled with one or more of multiple antennas. In some examples, one or more processors of the processing system 140 and / or the processing system 145 include or implement one or more of the radios, RF chains, or transceivers. An RF chain may include one or more filters, mixers, oscillators, amplifiers, analog-to-digital converters (ADCs) , and / or other devices that convert between an analog signal (such as for transmission or reception via an air interface) and a digital signal (such as for processing by the processing system 140 of the UE 120 or by the processing system 145 of the network node 110) .
[0040] A network node 110 and a UE 120 may each include one or multiple antennas or antenna arrays. Typical network nodes 110 and UEs 120 may include multiple antennas, which may be organized or structured into one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, among other examples. As used herein, the term “antenna” can refer to one or more antennas, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays. The term “antenna panel” can refer to a group of antennas (such as antenna elements) arranged in an array or panel, which may facilitate beamforming by manipulating parameters associated with the group of antennas. The term “antenna module” may refer to circuitry including one or more antennas as well as one or more other components (such as filters, amplifiers, or processors) associated with integrating the antenna module into a wireless communication device such as the network node 110 and the UE 120.
[0041] A network node 110 may be, may include, or may also be referred to as an NR network node, a 5G network node, a 6G network node, a Node B, a gNB, an access point (AP) , a transmission reception point (TRP) , a network entity, a network element, a network equipment, and / or another type of device, component, or system included in a radio access network (RAN) . In various deployments, a network node 110 may be implemented as a single physical node (for example, a single physical structure) or may be implemented as two or more physical nodes (for example, two or more distinct physical structures) . For example, a network node 110 may be a device or system that implements a part of a radio protocol stack, a device or system that implements a full radio protocol stack (such as a full gNB protocol stack) , or a collection of devices or systems that collectively implement the full radio protocol stack. For example, and as shown, a network node 110 may be an aggregated network node having an aggregated architecture, meaning that the network node 110 may implement a full radio protocol stack that is physically and logically integrated within a single physical structure in the wireless communication network 100. For example, an aggregated network node 110 may consist of a single standalone base station or a single TRP that operates with a full radio protocol stack to enable or facilitate communication between a UE 120 and a core network of the wireless communication network 100.
[0042] Alternatively, and as also shown, a network node 110 may be a disaggregated network node (sometimes referred to as a disaggregated base station) , having a disaggregated architecture, meaning that the network node 110 may operate with a radio protocol stack that is physically distributed and / or logically distributed among two or more nodes in the same geographic location or in different geographic locations. An example disaggregated network node architecture is described in more detail below with reference to Fig. 2. In some deployments, disaggregated network nodes 110 may be used in an integrated access and backhaul (IAB) network, in an open radio access network (O-RAN) (such as a network configuration in compliance with the O-RAN Alliance) , or in a virtualized radio access network (vRAN) , also known as a cloud radio access network (C-RAN) , to facilitate scaling by separating network functionality into multiple units or modules that can be individually deployed.
[0043] The network nodes 110 of the wireless communication network 100 may include one or more central units (CUs) , one or more distributed units (DUs) , and one or more radio units (RUs) . A CU may host one or more higher layers, such as a radio resource control (RRC) layer, a packet data convergence protocol (PDCP) layer, and a service data adaptation protocol (SDAP) layer, among other examples. A DU may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and / or one or more higher physical (PHY) layers depending, at least in part, on a functional split, such as a functional split defined by the 3GPP. In some examples, a DU also may host a lower PHY layer that is configured to perform functions, such as a fast Fourier transform (FFT) , an inverse FFT (IFFT) , beamforming, and / or physical random access channel (PRACH) extraction and filtering, among other examples. An RU may perform RF processing functions or lower PHY layer functions, such as an FFT, an IFFT, beamforming, or PRACH extraction and filtering, among other examples, according to a functional split, such as a lower layer split (LLS) . In such an architecture, each RU can be operated to handle over the air (OTA) communication with one or more UEs 120. In some examples, a single network node 110 may include a combination of one or more CUs, one or more DUs, and / or one or more RUs. In some examples, a CU, a DU, and / or an RU may be implemented as a virtual unit, such as a virtual central unit (VCU) , a virtual distributed unit (VDU) , or a virtual radio unit (VRU) , among other examples, which may be implemented as a virtual network function, such as in a cloud deployment.
[0044] Some network nodes 110 (for example, a base station, an RU, or a TRP) may provide communication coverage for a particular geographic area. The term “cell” can refer to a coverage area of a network node 110 or to a network node 110 itself, depending on the context in which the term is used. A network node 110 may support one or more cells (for example, each cell may support communication within an angular (for example, 60 degree) range around the network node) . In some examples, a network node 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, or another type of cell. A macro cell may cover a relatively large geographic area (for example, several kilometers in radius) and may allow unrestricted access by UEs 120 with associated service subscriptions. A pico cell may cover a relatively small geographic area and may also allow unrestricted access by UEs 120 with associated service subscriptions. A femto cell may cover a relatively small geographic area (for example, a home) and may allow restricted access by UEs 120 having association with the femto cell (for example, UEs 120 in a closed subscriber group (CSG) ) . In some examples, a cell may not necessarily be stationary. For example, the geographic area of the cell may move according to the location of an associated mobile network node 110 (for example, a train, a satellite, an unmanned aerial vehicle, or an NTN network node) .
[0045] The wireless communication network 100 may be a heterogeneous network that includes network nodes 110 of different types, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, aggregated network nodes, and / or disaggregated network nodes, among other examples. Various different types of network nodes 110 may generally transmit at different power levels, serve different coverage areas (for example, a cell 130a and a cell 130b) , and / or have different impacts on interference in the wireless communication network 100 than other types of network nodes 110.
[0046] The UEs 120 may be physically dispersed throughout the coverage area of the wireless communication network 100, and each UE 120 may be stationary or mobile. A UE 120 may be, may include, or may also be referred to as an access terminal, a mobile station, or a subscriber unit. A UE 120 may be, include, or be coupled with a cellular phone (for example, a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (for example, a smart watch, smart clothing, smart glasses, a smart wristband, or smart jewelry) , a gaming device, an entertainment device (for example, a music device, a video device, or a satellite radio) , an XR device, a vehicular component or sensor, a smart meter or sensor, industrial manufacturing equipment, a Global Navigation Satellite System (GNSS) device (such as a Global Positioning System device or another type of positioning device) , a UE function of a network node, and / or any other suitable device or function that may communicate via a wireless medium.
[0047] Some UEs 120 may be classified according to different categories in association with different complexities and / or different capabilities. UEs 120 in a first category may facilitate massive IoT in the wireless communication network 100, and may offer low complexity and / or cost relative to UEs 120 in a second category. UEs 120 in a second category may include mission-critical IoT devices, legacy UEs, baseline UEs, high-tier UEs, advanced UEs, full-capability UEs, and / or premium UEs that are capable of URLLC, eMBB, and / or precise positioning in the wireless communication network 100, among other examples. A third category of UEs 120 may have mid-tier complexity and / or capability (for example, a capability between that of the UEs 120 of the first category and that of the UEs 120 of the second capability) . A UE 120 of the third category may be referred to as a reduced capability UE ( “RedCap UE” ) , a mid-tier UE, an NR-Light UE, and / or an NR-Lite UE, among other examples. RedCap UEs may bridge a gap between the capability and complexity of NB-IoT devices and / or eMTC UEs, and mission-critical IoT devices and / or premium UEs. RedCap UEs may include, for example, wearable devices, IoT devices, industrial sensors, or cameras that are associated with a limited bandwidth, power capacity, and / or transmission range, among other examples. RedCap UEs may support healthcare environments, building automation, electrical distribution, process automation, transport and logistics, or smart city deployments, among other examples.
[0048] In some examples, a network node 110 may be, may include, or may operate as an RU, a TRP, or a base station that communicates with one or more UEs 120 via a radio access link (which may be referred to as a “Uu” link) . The radio access link may include a downlink and an uplink. “Downlink” (or “DL” ) refers to a communication direction from a network node 110 to a UE 120, and “uplink” (or “UL” ) refers to a communication direction from a UE 120 to a network node 110. Downlink and uplink resources may include time domain resources (for example, frames, subframes, slots, and symbols) , frequency domain resources (for example, frequency bands, component carriers (CCs) , subcarriers, resource blocks, and resource elements) , and spatial domain resources (for example, particular transmit directions or beams) .
[0049] Frequency domain resources may be subdivided into bandwidth parts (BWPs) . A BWP may be a block of frequency domain resources (for example, a continuous set of resource blocks (RBs) within a full component carrier bandwidth) that may be configured at a UE-specific level. A UE 120 may be configured with both an uplink BWP and a downlink BWP (which may be the same or different) . Each BWP may be associated with its own numerology (indicating a sub-carrier spacing (SCS) and cyclic prefix (CP) ) . A BWP may be dynamically configured or activated (for example, by a network node 110 transmitting a downlink control information (DCI) configuration to the one or more UEs 120) and / or reconfigured (for example, in real-time or near-real-time) according to changing network conditions in the wireless communication network 100 and / or specific requirements of one or more UEs 120. An active BWP defines the operating bandwidth of the UE 120 within the operating bandwidth of the serving cell. The use of BWPs enables more efficient use of the available frequency domain resources in the wireless communication network 100 because fewer frequency domain resources may be allocated to a BWP for a UE 120 (which may reduce the quantity of frequency domain resources that a UE 120 is required to monitor and reduce UE power consumption by enabling the UE to monitor fewer frequency domain resources) , leaving more frequency domain resources to be spread across multiple UEs 120. Thus, BWPs may also assist in the implementation of lower-capability (for example, RedCap) UEs 120 by facilitating the configuration of smaller bandwidths for communication by such UEs 120 and / or by facilitating reduced UE power consumption.
[0050] As used herein, a downlink signal may be or include a reference signal, control information, or data. For example, downlink reference signals include a primary synchronization signal (PSS) , a secondary SS (SSS) , an SS block (SSB) (for example, that includes a PSS, an SSS, and a physical broadcast channel (PBCH) ) , a demodulation reference signal (DMRS) , a phase tracking reference signal (PTRS) , a tracking reference signal (TRS) , and a CSI-RS, among other examples. A downlink signal carrying control information or data may be transmitted via a downlink channel. Downlink channels may include one or more control channels for transmitting control information and one or more data channels for transmitting data. Downlink reference signals may be transmitted in addition to, or multiplexed with, downlink control channel communications and / or downlink data channel communications. A downlink control channel may be specifically used to transmit DCI from a network node 110 to a UE 120. DCI generally contains the information the UE 120 needs to identify RBs in a subsequent subframe and how to decode them, including a modulation and coding scheme (MCS) or redundancy version parameters. Different DCI formats carry different information, such as scheduling information in the form of downlink or uplink grants, slot format indicators (SFIs) , preemption indicators (PIs) , transmit power control (TPC) commands, hybrid automatic repeat request (HARQ) information, new data indicators (NDIs) , among other examples. A downlink data channel may be used to transmit downlink data (for example, user data associated with a UE 120) from a network node 110 to a UE 120. Downlink control channels may include physical downlink control channels (PDCCHs) , and downlink data channels may include physical downlink shared channels (PDSCHs) . Control information or data communications may be transmitted on a PDCCH and PDSCH, respectively. For example, a PDCCH can carry DCI, while a PDSCH can carry a MAC control element (MAC-CE) , an RRC message, or user data, among other examples. Each PDSCH may carry one or more transport blocks (TBs) of data.
[0051] As used herein, an uplink signal may include a reference signal, control information, or data. For example, uplink reference signals include a sounding reference signal (SRS) , a PTRS, and a DMRS, among other examples. An uplink signal carrying control information or data may be transmitted via an uplink channel. An uplink channel may include one or more control channels for transmitting control information and one or more data channels for transmitting data. Uplink reference signals may be transmitted in addition to, or multiplexed with, uplink control channel communications and / or uplink data channel communications. An uplink control channel may be specifically used to transmit uplink control information (UCI) from a UE 120 to a network node 110. An uplink data channel may be used to transmit uplink data (for example, user data associated with a UE 120) from a UE 120 to a network node 110. Uplink control channels may include physical uplink control channels (PUCCHs) , and uplink data channels may include physical uplink shared channels (PUSCHs) . Control information or data communications may be transmitted on a PUCCH and PUSCH, respectively. For example, a PUCCH can carry UCI, while a PUSCH can carry a MAC-CE, an RRC message, or user data, among other examples. UCI can include a scheduling request (SR) , HARQ feedback information (for example, a HARQ acknowledgement (ACK) indication or a HARQ negative acknowledgement (NACK) indication) , uplink power control information (for example, an uplink TPC parameter) , and / or CSI, among other examples. CSI can include a CQI (indicative of downlink channel conditions to facilitate selection of transmission parameters, such as an MCS, by a network node 110) , a precoding matrix indicator (PMI) , a CSI-RS resource indicator (CRI) (for example, indicative of a beam used to transmit a CSI-RS) , an SS / PBCH resource block indicator (SSBRI) (for example, indicative of a beam used to transmit an SSB) , a layer indicator (LI) , a rank indicator (RI) , and / or measurement information (for example, a layer 1 (L1) -reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, among other examples) which can be used for beam management, among other examples. Each PUSCH may carry one or more TBs of data.
[0052] The information (for example, data, control information, or reference signal information) transmitted by a network node 110 to a UE 120, or vice versa, may be represented as a sequence of binary bits that are mapped (for example, modulated) to an analog signal waveform (for example, a discrete Fourier transform (DFT) -spread-orthogonal frequency division multiplexing (OFDM) (DFT-s-OFDM) waveform or a CP-OFDM waveform) that is transmitted by the network node 110 or UE 120 over a wireless communication channel. In some examples, the network node 110 or the UE 120 (for example, using the processing system 145 or the processing system 140, respectively) may select an MCS (for example, an order of quadrature amplitude modulation (QAM) , such as 64-QAM, 128-QAM, or 256-QAM, among other examples) for a downlink signal or an uplink signal. For example, the network node 110 may select an MCS for a downlink signal in accordance with UCI received from the UE 120. The network node 110 may transmit, to the UE 120, an indication of the selected MCS for the downlink signal, such as via DCI that schedules the downlink signal. As another example, the network node 110 may transmit, and the UE 120 may receive, an indication of an MCS to be applied for the one or more uplink signals, such as via DCI scheduling transmission of the one or more uplink signals.
[0053] The network node 110 or the UE 120 (such as by using the processing system 145 or the processing system 140, respectively, and / or one or more coupled modems) may perform signal processing on the information (such as filtering, amplification, modulation, digital-to-analog conversion, an IFFT operation, multiplexing, interleaving, mapping, and / or encoding, among other examples) to generate a processed signal in accordance with the selected MCS. In some examples, the network node 110 or the UE 120 (for example, using the processing system 145 or the processing system 140, respectively, and / or one or more coupled encoders or modems) may perform a channel coding operation or a forward error correction (FEC) operation to control errors in transmitted information. For example, the network node 110 or the UE 120 may perform an encoding operation to generate encoded information (such as by selectively introducing redundancy into the information, typically using an error correction code (ECC) , such as a polar code or a low-density parity-check (LDPC) code) . The network node 110 or the UE 120 (for example, using the processing system 145 and / or one or more modems) may further perform spatial processing (for example, precoding) on the encoded information to generate one or more processed or precoded signals for downlink or uplink transmission, respectively. In some examples, the network node 110 or the UE 120 may perform codebook-based precoding or non-codebook-based precoding. Codebook-based precoding may involve selecting a precoder (for example, a precoding matrix) using a codebook. For example, the network node 110 may provide precoding information indicating which precoder, defined by the codebook, is to be used by the UE 120. Non-codebook-based precoding may involve selecting or deriving a precoder based on, or otherwise associated with, one or more downlink or uplink signal measurements. The network node 110 or the UE 120 may transmit the processed downlink or uplink signals, respectively, via one or more antennas.
[0054] The network node 110 or the UE 120 may receive uplink signals or downlink signals, respectively, via one or more antennas. The network node 110 or the UE 120 (for example, using the processing system 145 or the processing system 140, respectively, and / or one or more coupled modems) may perform signal processing (for example, in accordance with the MCS) on the received uplink or downlink signals, respectively (such as filtering, amplification, demodulation, analog-to-digital conversion, an FFT operation, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, and / or decoding, among other examples) , to map the received signal (s) to a sequence of binary bits (for example, received information) that estimates the information transmitted by the network node 110 or the UE 120 via the downlink or uplink signals. The network node 110 or the UE 120 (for example, using the processing system 145 or the processing system 140, respectively, and / or a coupled decoder or one or more modems) may decode the received information (such as by using an ECC, a decoding operation, and / or an FEC operation) to detect errors and / or correct bit errors in the received information to generate decoded information. The decoded information may estimate the information transmitted via the downlink or uplink signals.
[0055] In some examples, a UE 120 and a network node 110 may perform MIMO communication. “MIMO” generally refers to transmitting or receiving multiple signals (such as multiple layers or multiple data streams) simultaneously over the same time and frequency resources. MIMO techniques generally exploit multipath propagation. A network node 110 and / or UE 120 may communicate using massive MIMO, multi-user MIMO, or single-user MIMO, which may involve rapid switching between beams or cells. For example, the amplitudes and / or phases of signals transmitted via antenna elements and / or sub-elements may be modulated and shifted relative to each other (such as by manipulating a phase shift, a phase offset, and / or an amplitude) to generate one or more beams, which is referred to as beamforming. For example, the network node 110b may generate one or more beams 160a, and the UE 120b may generate one or more beams 160b. The term “beam” may refer to a directional transmission of a wireless signal toward a receiving device or otherwise in a desired direction, a directional reception of a wireless signal from a transmitting device or otherwise in a desired direction, a direction associated with a directional transmission or directional reception, a set of directional resources associated with a signal transmission or signal reception (for example, an angle of arrival, a horizontal direction, and / or a vertical direction) , a set of parameters that indicate one or more aspects of a directional signal, a direction associated with the signal, and / or a set of directional resources associated with the signal, among other examples.
[0056] MIMO may be implemented using various spatial processing or spatial multiplexing operations. In some examples, MIMO may include a massive MIMO technique which may be associated with an increased (for example, “massive” ) quantity of antennas at the network node 110 and / or at the UE 120, such as in a network implementing mmWave technology. Massive MIMO may improve communication reliability by enabling a network node 110 and / or a UE 120 to communicate the same data across different propagation (or spatial) paths. In some examples, MIMO may support simultaneous transmission to multiple receivers, referred to as multi-user MIMO (MU-MIMO) . Some RATs may employ MIMO techniques, such as 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) .
[0057] To support MIMO techniques, the network node 110 and the UE 120 may perform one or more beam management operations, such as an initial beam acquisition operation, one or more beam refinement operations, and / or a beam recovery operation. For example, an initial beam acquisition operation may involve the network node 110 transmitting signals (for example, SSBs, CSI-RSs, or other signals) via respective beams (for example, of the beams 160a of the network node 110) and the UE 120 receiving and measuring the signal (s) via respective beams of multiple beams (for example, from the beams 160b of the UE 120) to identify a best beam (or beam pair) for communication between the UE 120 and the network node 110. For example, the UE 120 may transmit an indication (for example, in a message associated with a random access channel (RACH) operation) of a (best) identified beam of the network node 110 (for example, by indicating an SSBRI or other identifier associated with the beam) . A beam refinement operation may involve a first device (for example, the UE 120 or the network node 110) transmitting signal (s) via a subset of beams (for example, identified based on, or otherwise associated with, measurements reported as part of one or more other beam management operations) . A second device (for example, the network node 110 or the UE 120) may receive the signal (s) via a single beam (for example, to identify the best beam for communication from the subset of beams) . The beam (s) may be identified via one or more spatial parameters, such as a transmission configuration indicator (TCI) state and / or a quasi co-location (QCL) parameter, among other examples. The network node 110 and the UE 120 may increase reliability and / or achieve efficiencies in throughput, signal strength, and / or other signal properties for massive MIMO operations by performing the beam management operations.
[0058] Some aspects and techniques as described herein may be implemented, at least in part, using an artificial intelligence (AI) program (for example, referred to herein as an “AI / ML model” ) , such as a program that includes a machine learning (ML) model and / or an artificial neural network (ANN) model. The AI / ML model may be deployed at one or more devices 165 (for example, one or more network nodes 110, one or more UEs 120, and / or one or more servers, and / or one or more components of a cloud computing network, among other examples) . For example, in an deployment where AI / ML functionality is performed independently at a device 165, sometimes referred to as “overlay AI / ML” , the AI / ML model (or an instance or portion of the AI / ML model) may be deployed at a UE 120 (for example, at the processing system 140) , a network node 110 (for example, at the processing system 145) , one or more servers, and / or one or more components of a cloud computing network, among other examples. Additionally or alternatively, in a deployment where AI / ML functionality is coordinated between different devices 165, sometimes referred to as “coordinated AI / ML” , or performed at all device and network layers, sometimes referred to as “native AI / ML” , the AI / ML model (or an instance of the AI / ML model) may be deployed at multiple devices 165 (for example, a first portion of the AI / ML model may be deployed at a UE 120 and a second portion of the AI / ML model may be deployed at a network node 110) . In other examples of coordinated AI / ML and / or native AI / ML, a first AI / ML model may be deployed at a UE 120 and a second AI / ML model may be deployed at a network node 110. The AI / ML model (s) may be configured to enhance various aspects of the wireless communication network 100 (for example, to increase privacy, reliability, and / or efficient use of network bandwidth, and / or to reduce latency, among other examples) . For example, the AI / ML model (s) may be trained to identify patterns or relationships in data corresponding to the wireless communication network 100, a device, and / or an air interface, among other examples. The AI / ML model (s) may support operational decisions relating to one or more aspects associated with wireless communications devices, networks, or services.
[0059] Accordingly, in some examples, the AI / ML model (s) may enable AI-as-a-Service (for example, an end-to-end AI / ML service via a user plane) for use cases such as a self-organizing network (SON) , minimization of drive test (MDT) , quality of experience (QoE) , positioning, sensing, predictive mobility, and / or traffic prediction, among other examples. In some examples, AI-as-a-Service use cases may include measurement collection reporting by a UE 120, device selection criteria (for example, according to a geographical area where measurements are to be collected and / or UE capabilities to be used to collected measurements) , and / or reporting configurations (for example, reporting parameters such as location, time, and / or sensor information, among other examples) . Additionally or alternatively, the AI / ML model (s) may enable AI / ML procedures (for example, RAN-triggered service establishment, configuration, inferencing using UE-side and / or network-side models, performance monitoring and / or management, and / or capability signaling, among other examples) . Additionally or alternatively, the AI / ML model (s) may enable RAN-based AI / ML services via one or more application program interfaces (APIs) and / or management interfaces for use cases such as beam management, radio resource monitoring (RRM) relaxation, mobility prediction, load prediction, network energy savings, and / or coverage and capacity improvements, among other examples) .
[0060] In some aspects, the UE 120 may include a communication manager 150. As described in more detail elsewhere herein, the communication manager 150 may receive one or more channel measurement resources or one or more interference measurement resources; and transmit a CSI report that includes change information associated with a difference between a CSI value and a reference value. Additionally, or alternatively, the communication manager 150 may perform one or more other operations described herein.
[0061] In some aspects, the network node 110 may include a communication manager 155. As described in more detail elsewhere herein, the communication manager 155 may transmit one or more channel measurement resources or one or more interference measurement resources; and receive, from a UE, a CSI report that includes change information associated with a difference between a CSI value and a reference value. Additionally, or alternatively, the communication manager 155 may perform one or more other operations described herein.
[0062] Fig. 2 is a diagram illustrating an example disaggregated network node architecture 200, in accordance with the present disclosure. One or more components of the example disaggregated network node architecture 200 may be, may include, or may be included in one or more network nodes (such one or more network nodes 110) . The disaggregated network node architecture 200 may include a CU 210 that can communicate directly with a core network 220 via a backhaul link, or that can communicate indirectly with the core network 220 via one or more disaggregated control units, such as a non-real-time (Non-RT) RAN intelligent controller (RIC) 250 associated with a Service Management and Orchestration (SMO) Framework 260 and / or a near-real-time (Near-RT) RIC 270 (for example, via an E2 link) . The CU 210 may communicate with one or more DUs 230 via respective midhaul links, such as via F1 interfaces. Each of the DUs 230 may communicate with one or more RUs 240 via respective fronthaul links. Each of the RUs 240 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 240.
[0063] Each of the components of the disaggregated network node architecture 200, including the CUs 210, the DUs 230, the RUs 240, the Near-RT RICs 270, the Non-RT RICs 250, and the SMO Framework 260, 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.
[0064] In some aspects, the CU 210 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 210 may be deployed to communicate with one or more DUs 230, as necessary, for network control and signaling. Each DU 230 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 240. For example, a DU 230 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 230, or for communicating signals with the control functions hosted by the CU 210. Each RU 240 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) 240 may be controlled by the corresponding DU 230.
[0065] The SMO Framework 260 may support RAN deployment and provisioning of non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO Framework 260 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 260 may interact with a cloud computing platform (such as an open cloud (O-Cloud) platform 290) 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 210, a DU 230, an RU 240, a non-RT RIC 250, and / or a Near-RT RIC 270. In some aspects, the SMO Framework 260 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) 280, via an O1 interface. Additionally or alternatively, the SMO Framework 260 may communicate directly with each of one or more RUs 240 via a respective O1 interface. In some deployments, this configuration can enable each DU 230 and the CU 210 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
[0066] The Non-RT RIC 250 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 270. The Non-RT RIC 250 may be coupled to or may communicate with (such as via an A1 interface) the Near-RT RIC 270. The Near-RT RIC 270 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 210, one or more DUs 230, and / or an O-eNB 280 with the Near-RT RIC 270.
[0067] In some aspects, to generate AI / ML models to be deployed in the Near-RT RIC 270, the Non-RT RIC 250 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 270 and may be received at the SMO Framework 260 or the Non-RT RIC 250 from non-network data sources or from network functions. In some examples, the Non-RT RIC 250 or the Near-RT RIC 270 may tune RAN behavior or performance. For example, the Non-RT RIC 250 may monitor long-term trends and patterns for performance and may employ AI / ML models to perform corrective actions via the SMO Framework 260 (such as reconfiguration via an O1 interface) or via creation of RAN management policies (such as A1 interface policies) .
[0068] The network node 110, the processing system 145 of the network node 110, the UE 120, the processing system 140 of the UE 120, the CU 210, the DU 230, the RU 240, or any other component (s) of Fig. 1 and / or Fig. 2 may implement one or more techniques or perform one or more operations associated with a CSI report that indicates change information, as described in more detail elsewhere herein. For example, the processing system 145 of the network node 110, the processing system 140 of the UE 120, the CU 210, the DU 230, or the RU 240 may perform or direct operations of, for example, process 400 of Fig. 4, process 500 of Fig. 5, or other processes as described herein (alone or in conjunction with one or more other processors) . Memory of the network node 110 may store data and program code (or instructions) for the network node 110, the CU 210, the DU 230, or the RU 240. In some examples, the memory of the network node 110 may store data relating to a UE 120, such as RRC state information or a UE context. Memory of a UE 120 may store data and program code (or instructions) for the UE 120, such as context information. In some examples, the memory of the UE 120 or the memory of the network node 110 may include a non-transitory computer-readable medium storing a set of instructions for wireless communication. For example, the set of instructions, when executed by one or more processors (for example, of the processing system 145 or the processing system 140) of the network node 110, the UE 120, the CU 210, the DU 230, or the RU 240, may cause the one or more processors to perform process 400 of Fig. 4, process 500 of Fig. 5, 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.
[0069] In some aspects, the UE 120 includes means for receiving one or more channel measurement resources or one or more interference measurement resources; and / or means for transmitting a CSI report that includes change information associated with a difference between a CSI value and a reference value. The means for the UE 120 to perform operations described herein may include, for example, one or more of communication manager 150, processing system 140, a radio, one or more RF chains, one or more transceivers, one or more antennas, one or more modems, a reception component (for example, reception component 602 depicted and described in connection with Fig. 6) , and / or a transmission component (for example, transmission component 604 depicted and described in connection with Fig. 6) , among other examples.
[0070] In some aspects, the network node 110 includes means for transmitting one or more channel measurement resources or one or more interference measurement resources; and / or means for receiving, from a UE 120, a CSI report that includes change information associated with a difference between a CSI value and a reference value. The means for the network node 110 to perform operations described herein may include, for example, one or more of communication manager 155, processing system 145, a radio, one or more RF chains, one or more transceivers, one or more antennas, one or more modems, a reception component (for example, reception component 702 depicted and described in connection with Fig. 7) , and / or a transmission component (for example, transmission component 704 depicted and described in connection with Fig. 7) , among other examples.
[0071] Fig. 3 is a diagram illustrating an example 300 associated with a CSI report that includes change information, in accordance with the present disclosure. As shown in Fig. 3, a network node 110 and a UE 120 may communicate with one another. Change information may be associated with a difference between a CSI value and a reference value. The CSI value may be based, at least in part, on a measurement of a CSI-RS performed by the UE 120. In some aspects, the CSI value and the reference value may be associated with a CQI, CSF, RI, PMI, channel gain, SINR, effective channel gain, delay spread, Doppler spread, or interference, among other examples. The CSI value and the reference value may be a numerical value (such as a scalar or integer) , a matrix, or a vector, among other examples. In some aspects, the change information may include one or more bits indicating a reason for the difference between the CSI value and the reference value. The reason for the difference between the CSI value and the reference value may include one or more of a channel change (e.g., a change in a wireless communication channel used by the UE 120 and the network node 110) or an interference change (e.g., a change in interference in the channel used for communication between the UE 120 and the network node 110) .
[0072] As shown by reference number 305, the UE 120 may transmit, and the network node 110 may receive, a change information metric indication or a suggestion for a change information metric. In some aspects, the change information metric indication or the suggestion for the change information metric may be associated with the metric to be used for defining (e.g., measuring or otherwise determining) the change information. For example, the UE 120 may indicate or suggest, to the network node 110, that the change information metric is (or should be) an SINR corresponding to a scheduled MCS and an SINR of a demodulated signal (e.g., a signal demodulated by the UE 120) .
[0073] As shown by reference number 310, the network node 110 may transmit, and the UE 120 may receive, one or more configurations for the CSI report with the change information. In some aspects, the one or more configurations may include a configuration for transmitting the CSI report periodically, semi-persistently, or aperiodically. In some aspects, the one or more configurations may identify one or more metrics associated with the change information. For example, in some aspects, the one or more metrics may include the SINR corresponding to the scheduled MCS and the SINR of a demodulated signal. In some aspects, the one or more metrics may be based, at least in part, on the indication and / or suggestion of the UE 120.
[0074] In some aspects, the one or more configurations may include a CSI report configuration. The CSI report configuration may configure the UE 120 with a report quantity parameter associated with the change information. In some aspects, the CSI report configuration may configure the UE 120 to transmit the CSI report in accordance with the report quantity parameter.
[0075] In some aspects, the one or more configurations may include a configuration for a reference resource. Alternatively, the reference resource may be indicated to the UE 120. The reference resource may be a resource for the reference value, as discussed in greater detail below. For example, the reference resource may be a measurement resource that occurs before a measurement resource used to determine the change information. In some aspects, rather than configure or indicate a particular reference resource, the UE 120 may be configured to determine the reference value from a previous CSI report (e.g., a most recent CSI report) relative to the CSI report that includes (or will include) the change information. In some aspects, the most recent CSI report may be a previous instance of a periodic, semi-persistent, or aperiodic CSI report transmitted from the UE 120 to the network node 110 in accordance with a CSI reporting configuration. In some aspects, the most recent CSI report and the CSI report that includes (or will include) the change information may have a same reporting type (e.g., periodic, semi-persistent, or aperiodic) , a same report quantity (e.g., PMI, RI, CQI, wideband-based, subband based, and / or a combination thereof, among other examples) , a same wideband or subband reporting characteristic, a same CSI codebook type, a same measurement resource (e.g., a same CSI-RS resource or resource set) , a same beam or transmission configuration information state, a same component carrier, and / or a combination thereof, among other examples. The most recent CSI report may be associated with one or more reference resources. For example, the most recent CSI report may be associated with one or more of a first reference resource and a second reference resource. The first reference resource may be used, by the UE 120, to determine a channel change and the second reference resource may be used, by the UE 120, to determine an interference change. Accordingly, the one or more configurations may include one or more configurations for the reference resources (e.g., a first configuration for the first reference resource and a second configuration for the second reference resource, among other examples) .
[0076] In some aspects, the one or more configurations may include a configuration for one or more event triggers for transmitting the CSI report. The one or more event triggers, as discussed in greater detail below, may be associated with a channel change threshold, an interference threshold, and / or a combination thereof, among other examples. In some aspects, at least one of the channel change threshold or the interference threshold for the one or more event triggers may be different from at least one of a channel threshold or interference threshold, respectively, for determining the change information. For example, the channel change threshold for the one or more event triggers may be associated with a difference in a power of a channel of at least one antenna pair and the channel change threshold for determining the change information may correspond to an average power across all transmitter ports and receiver antennas. Alternatively or additionally, the interference threshold for the one or more event triggers may be associated with a sum power of a diagonal term of an Rnn matrix, and the interference threshold for determining the change information may correspond to a difference in an interference-plus-noise power. Alternatively or additionally, the channel change threshold or the interference threshold for the one or more event triggers may be associated with a CQI threshold, and the channel change threshold or the interference threshold for determining the change information may correspond to a threshold different from the CQI threshold.
[0077] In some aspects, the one or more configurations may include a configuration for the UE 120 to transmit the CSI report in accordance with the one or more event triggers. Alternatively, the UE 120 may be pre-configured (e.g., predefined by a communication standard and / or configured through firmware or in accordance with a factory setting) to transmit the CSI report in accordance with one or more event triggers.
[0078] In some aspects, the one or more configurations may include a configuration for at least one historical occasion and / or one or more future occasions. The one or more historical occasions and / or future occasions may be associated with predicting the change information, as discussed in greater detail below.
[0079] As shown by reference number 315, the UE 120 may transmit, and the network node 110 may receive, a capability indication. The capability indication may be associated with one or more UE capabilities for transmitting the CSI report with the change information. In some aspects, the capability indication may indicate, to the network node 110, that the UE 120 supports (e.g., can implement) one or more of the configurations discussed above with respect to reference number 310. In some aspects, the UE 120 may transmit the capability indication in response to at least one of the one or more configurations received. In some aspects, the UE 120 may transmit a capability indication for each configuration received. Alternatively, if the UE 120 receives multiple configurations, the UE 120 may transmit a capability indication that indicates which configurations, if any, the UE 120 supports or is otherwise capable of implementing.
[0080] As shown by reference number 320, the network node 110 may transmit, and the UE 120 may receive, an activation signal. The activation signal may be transmitted to the UE 120 in response to the capability indication discussed above. In some aspects, the activation signal may activate, at the UE 120, one or more configurations transmitted to the UE 120. For example, the activation signal may activate one or more configurations that the UE 120 is capable of applying.
[0081] As shown by reference number 325, the UE 120 may apply the one or more configurations activated by the activation signal. Applying the one or more configurations may configure the UE 120 to detect the difference between the CSI value and the reference value and transmit the CSI report as a result of detecting the difference between the CSI value and the reference value. For example, applying the one or more configurations may configure the UE 120 to transmit the CSI report in accordance with the report quantity parameter, which may cause the UE 120 to include or omit certain information from the CSI report. For example, transmitting the CSI report in accordance with the report quantity parameter may include transmitting the CSI report without a CQI, without an RI, without a PMI, without a layer indicator, without channel measurement information, without interference information, without beam quality metrics, without codebook information, without timing and configuration information, and / or a combination thereof, among other examples. Alternatively, transmitting the CSI report in accordance with the report quantity parameter may include transmitting the CSI report with one or more of the CQI, the RI, the PMI, a layer indicator, channel measurement information, interference information, beam quality metrics, codebook information, timing and configuration information, and / or a combination thereof, among other examples.
[0082] As shown by reference number 330, the network node 110 may transmit, and the UE 120 may receive, a CSI-RS in one or more resources. The UE 120 may measure the CSI in accordance with the one or more configurations discussed above. For example, the one or more configurations may configure the UE 120 to measure one or more characteristics of the CSI-RS to determine the change information in accordance with the CSI value and the reference value. In accordance with one or more configurations, CSI-RS measurements for determining change information associated with changing a channel and CSI-RS measurements for determining change information associated with interference may correspond to different resources indicated by the network node 110. For example, the CSI value may be determined from the CSI-RS transmitted with respect to reference number 330, as discussed in greater detail below. The reference value may be determined from one or more previous CSI-RS transmissions in one or more previous resources. Different resources may be associated with different types of reference values. For example, a first CSI-RS may be transmitted in a first resource (e.g., a channel measurement resource) associated with a channel change. A measurement of the first CSI-RS may be used to determine a first reference value (e.g., a reference value associated with a channel change) . A second CSI-RS may be transmitted in a second resources (e.g., an interference measurement resource) associated with an interference change. A measurement of the second CSI-RS may be used to determine a second reference value (e.g., a reference value associated with interference) . The CSI-RS shown by reference number 330 may be a third CSI-RS that, when compared to the first reference value and / or the second reference value, may be used to determine the change information associated with a channel change, an interference change, or both, as discussed below.
[0083] As shown by reference number 335, the UE 120 may perform one or more measurements of the CSI-RS. In some aspects, the UE 120 may perform one or more measurements of the CSI-RS to determine the CSI value that can be compared to the reference value. For example, the UE 120 may compare an SINR of a demodulated signal to an SINR threshold. The UE 120 may determine the change information in accordance with the SINR of the demodulated signal exceeding the SINR threshold.
[0084] As shown by reference number 340, the UE 120 may perform an event trigger analysis. For example, the UE 120 may determine whether one or more criteria for an event trigger have been satisfied. In some aspects, the event triggers may be configured by the network node 110, as discussed above.
[0085] As shown by reference number 345, the UE 120 may transmit, and the network node 110 may receive, an event indication. In some aspects, the UE 120 may transmit the event indication on a first uplink resource associated with at least one of the event triggers. The resource for transmitting the event indication may be different from a resource for transmitting the CSI report. Accordingly, the CSI report may be transmitted on a second uplink resource. In some aspects, the event indication may be transmitted via a MAC-CE.
[0086] As shown by reference number 350, the UE 120 may transmit, and the network node 110 may receive, the CSI report. In some aspects, the CSI report may be transmitted via a MAC-CE. The CSI report may include the change information associated with the difference between the CSI value and the reference value. In some aspects, the change information may include one or more bits indicating one or more of a channel delta (e.g., the difference between two channel-based values) or an Rnn delta (e.g., the difference between two interference-based values) . In some aspects, the change information may include one or more bits indicating a reason for the difference between the CSI value and the reference value. For example, the reason for the difference between the CSI value and the reference value may include a channel change (e.g., a change based on channel conditions) or an interference change (e.g., a change based on interference) . In some aspects, the change information may include one or more bits indicating one or more of the channel delta or the Rnn delta. The channel delta may be a difference in a matrix or a vector of a channel power of different transmitter-receiver (Tx-Rx) antenna pairs, a difference in a sum power of a channel for all Tx-Rx antenna pairs, a difference in an average power across all transmitter ports and receiver antennas, a difference in a vector of eigenvalues of a channel, a difference in a strongest eigenvalue or group of strongest eigenvalues of the channel, and / or a combination thereof, among other examples. The Rnn delta may be one or more of a difference in the Rnn matrix, a difference in a sum power of diagonal terms of the Rnnmatrix, or a difference in an interference-plus-noise power average across multiple receiver antennas.
[0087] In some aspects, the change information may indicate whether the difference between the CSI value and the reference value exceeds a threshold. The threshold may be a channel change threshold (e.g., a threshold for channel-based values) or an interference threshold (e.g., a threshold for interference-based values) . Accordingly, in some aspects, the change information may include two or more bits indicating that the difference between the CSI value and the reference value exceeds the threshold, does not exceed the threshold, or is the same as the threshold. Alternatively, in some aspects, the change information may include two bits or four bits to indicate that a channel delta exceeds a channel change threshold, does not exceed the channel change threshold, or is the same as the channel change threshold. Alternatively or additionally, in some aspects, the change information may include two bits or four bits to indicate that an interference delta exceeds an interference threshold, does not exceed the interference threshold, or is the same as the interference threshold. In some aspects, the change information may include bits to indicate both the channel delta and the interference delta. For example, the change information may include two bits to indicate that the channel delta exceeds the channel change threshold, does not exceed the channel change threshold, or is the same as the channel change threshold. The change information may further include two additional bits to indicate that the interference delta exceeds the interference threshold, does not exceed the interference threshold, or is the same as the interference threshold.
[0088] In some aspects, the change information may indicate a range of a channel change and / or a range of an interference change. Each range may be defined in accordance with a lower threshold value and an upper threshold value. The UE 120 may transmit an indication of the lower threshold value and / or the upper threshold value for the range of the channel change and / or the range of the interference change. In some aspects, the UE 120 may transmit the indication of the lower threshold value and / or the upper threshold value for the range of the channel change and / or the range of the interference change as part of the change information metrics indication, discussed above with respect to reference number 305. In some aspects, the lower threshold value and / or the upper threshold value for the range of the channel change and / or the range of the interference change may be predefined or configured in a table that associates the lower threshold value and the upper threshold value to one or more threshold index values. Accordingly, in some aspects, the UE 120 may transmit one or more threshold index values to indicate the range of channel changes and / or the range of interference changes.
[0089] In some aspects, the change information may be associated with a frequency domain difference, a time domain difference, or a spatial domain difference. The time domain difference may be associated with an instantaneous channel estimate or an average channel estimate. In some aspects, the average channel estimate may be determined in accordance with an averaging window. The averaging window for the average channel estimate may be different from an averaging window associated with the CSI report. The frequency domain difference may be associated with one or more of a frequency difference for a single subband, an average frequency difference over a subset of subbands, or an average frequency difference over all subbands. When the change information is associated with the single subband, the CSI report may be associated with the single subband. When the change information is associated with the subset of subbands or all subbands, the CSI report may be a wideband report (e.g., a CSI report applicable to multiple frequencies) . The spatial domain difference may be determined in accordance with one or more of a single codebook, an average of a subset of codebooks, or an average of all codebooks.
[0090] In some aspects, the change information may be associated with a difference between a first term and a second term. The first term may be a value representing a difference between a measured channel characteristic and one or more historical occasions or one or more predicted channel characteristics with respect to one or more future occasions. In some aspects, the first term may be associated with measurements of signals in one or more measurement resources included the CSI report. The second term may be a value representing one or more predicted channel characteristics in one or more future occasions. The one or more future occasions of the second term may occur after the one or more historical occasions or the one or more future occasions of the first term. In some aspects, the measured channel characteristic or each of the one or more predicted channel characteristics of the first term may be associated with one or more of a rank indicator, a channel quality indicator, or a precoding matrix indicator. In some aspects, the one or more future occasions of the second term may occur after a reference resource associated with the CSI report. In some aspects, the one or more historical occasions may occur no later than a reference resource associated with the CSI report. In some aspects, at least one of the one or more historical occasions, the one or more future occasions associated with the first term, or the future occasions associated with the second term may be included in the CSI report.
[0091] As shown by reference number 355, the network node 110 may transmit, and the UE 120 may receive, an updated MCS in accordance with the change information. For example, as discussed above, if the change information indicates that the SINR of the demodulated signal exceeds the SINR threshold, the network node 110 may determine that the change information indicates that the network has degraded. Further, the network node 110 may determine that the network quality could be improved by communicating with the UE 120 via an updated MCS. Accordingly, the network node 110 may select the updated MCS and transmit the updated MCS to the UE 120 for future communications between the UE 120 and the network node 110.
[0092] As indicated above, Fig. 3 is provided as an example. Other examples may differ from what is described with respect to Fig. 3.
[0093] Fig. 4 is a diagram illustrating an example process 400 performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure. Example process 400 is an example where the apparatus or the UE (e.g., UE 120) performs operations associated with reporting a change in a CSI value.
[0094] As shown in Fig. 4, in some aspects, process 400 may include receiving one or more channel measurement resources or one or more interference measurement resources (block 410) . For example, the UE (e.g., using reception component 602 and / or communication manager 606, depicted in Fig. 6) may receive one or more channel measurement resources, one or more interference measurement resources, and / or a combination thereof, among other examples, as described above.
[0095] As further shown in Fig. 4, in some aspects, process 400 may include transmitting a CSI report that includes change information associated with a difference between a CSI value and a reference value (block 420) . For example, the UE (e.g., using transmission component 604 and / or communication manager 606, depicted in Fig. 6) may transmit a CSI report that includes change information associated with a difference between a CSI value and a reference value, as described above.
[0096] Process 400 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.
[0097] In a first aspect, the change information includes one or more bits indicating a reason for the difference between the CSI value and the reference value.
[0098] In a second aspect, alone or in combination with the first aspect, the reason for the difference between the CSI value and the reference value includes one or more of a channel change or an interference change.
[0099] In a third aspect, alone or in combination with one or more of the first and second aspects, the change information includes one or more bits indicating one or more of a channel delta or an Rnn delta.
[0100] In a fourth aspect, alone or in combination with one or more of the first through third aspects, the channel delta is one of a difference in a matrix or a vector of a channel power of different Tx-Rx antenna pairs, a difference in a sum power of a channel for all Tx-Rx antenna pairs, a difference in an average power across all transmitter ports and receiver antennas, a difference in a vector of eigenvalues of a channel, or a difference in a strongest eigenvalue or group of strongest eigenvalues of the channel.
[0101] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the Rnn delta is one or more of a difference in an Rnn, a difference in a sum power of diagonal terms of the Rnn, or a difference in an interference-plus-noise power average across multiple receiver antennas.
[0102] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the change information indicates whether the difference between the CSI value and the reference value exceeds a threshold.
[0103] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the threshold is a channel change threshold or an interference threshold.
[0104] In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the change information includes two or more bits indicating that the difference in the CSI value and the reference value exceeds the threshold, does not exceed the threshold, or is the same as the threshold.
[0105] In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the change information includes two bits or four bits to indicate that a channel delta exceeds a channel change threshold, does not exceed the channel change threshold, or is the same as the channel change threshold.
[0106] In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the change information includes two bits or four bits to indicate that an interference delta exceeds an interference threshold, does not exceed the interference threshold, or is the same as the interference threshold.
[0107] In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, the change information includes two bits to indicate that a channel delta exceeds a channel change threshold, does not exceed the channel change threshold, or is the same as the channel change threshold, and two bits to indicate that an interference delta exceeds an interference threshold, does not exceed the interference threshold, or is the same as the interference threshold.
[0108] In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, the change information indicates one or more of range of a channel change or a range of an interference change, and one or more of the range of the channel change or the range of the interference change are defined in accordance with a lower threshold value and an upper threshold value.
[0109] In a thirteenth aspect, alone or in combination with one or more of the first through twelfth aspects, process 400 includes transmitting an indication of one or more of the lower threshold value or the upper threshold value.
[0110] In a fourteenth aspect, alone or in combination with one or more of the first through thirteenth aspects, one or more of the lower threshold value or the upper threshold value are predefined or configured in a table that associates the lower threshold value and the upper threshold value to one or more threshold index values, and transmitting the indication of one or more of the lower threshold value or the upper threshold value includes transmitting the one or more threshold index values.
[0111] In a fifteenth aspect, alone or in combination with one or more of the first through fourteenth aspects, process 400 includes receiving a configuration identifying one or more metrics associated with the change information.
[0112] In a sixteenth aspect, alone or in combination with one or more of the first through fifteenth aspects, process 400 includes transmitting signaling that indicates a metric to be used for defining the change information.
[0113] In a seventeenth aspect, alone or in combination with one or more of the first through sixteenth aspects, the change information is associated with an SINR corresponding to a scheduled MCS and an SINR of a demodulated signal.
[0114] In an eighteenth aspect, alone or in combination with one or more of the first through seventeenth aspects, process 400 includes comparing the SINR of the demodulated signal to an SINR threshold, and transmitting the change information as a result of the SINR of the demodulated signal exceeding the SINR threshold.
[0115] In a nineteenth aspect, alone or in combination with one or more of the first through eighteenth aspects, process 400 includes receiving an updated MCS in accordance with the change information indicating that the SINR of the demodulated signal exceeds the SINR threshold.
[0116] In a twentieth aspect, alone or in combination with one or more of the first through nineteenth aspects, process 400 includes detecting the difference between a CSI value and the reference value, and transmitting the CSI report includes transmitting the CSI report as a result of detecting the difference between the CSI value and the reference value.
[0117] In a twenty-first aspect, alone or in combination with one or more of the first through twentieth aspects, process 400 includes receiving a CSI report configuration having a report quantity parameter associated with the change information, and transmitting the CSI report includes transmitting the CSI report in accordance with the report quantity parameter.
[0118] In a twenty-second aspect, alone or in combination with one or more of the first through twenty-first aspects, transmitting the CSI report in accordance with the report quantity parameter includes transmitting the CSI report without a channel quality indicator, a rank indicator, a precoding matrix indicator, a layer indicator, channel measurement information, interference information, beam quality metrics, codebook information, or timing and configuration information.
[0119] In a twenty-third aspect, alone or in combination with one or more of the first through twenty-second aspects, transmitting the CSI report in accordance with the report quantity parameter includes transmitting the CSI report with one or more of a channel quality indicator, a rank indicator, a precoding matrix indicator, a layer indicator, channel measurement information, interference information, beam quality metrics, codebook information, or timing and configuration information.
[0120] In a twenty-fourth aspect, alone or in combination with one or more of the first through twenty-third aspects, the reference value is associated with a most recent CSI report before the CSI report that includes the change information.
[0121] In a twenty-fifth aspect, alone or in combination with one or more of the first through twenty-fourth aspects, the most recent CSI report is associated with a periodic, semi-persistent, or aperiodic CSI reporting configuration.
[0122] In a twenty-sixth aspect, alone or in combination with one or more of the first through twenty-fifth aspects, the most recent CSI report and the CSI report that includes the change information have one or more of a same reporting type, a same report quantity, a same wideband or subband reporting characteristic, a same CSI codebook type, a same measurement resource, a same beam or transmission configuration information state, or a same component carrier.
[0123] In a twenty-seventh aspect, alone or in combination with one or more of the first through twenty-sixth aspects, the most recent CSI report is associated with a reference resource, and the reference resource is a measurement resource that occurs before a measurement resource used to determine the change information.
[0124] In a twenty-eighth aspect, alone or in combination with one or more of the first through twenty-seventh aspects, process 400 includes receiving a configuration or indication associated with the reference resource.
[0125] In a twenty-ninth aspect, alone or in combination with one or more of the first through twenty-eighth aspects, the most recent CSI report is associated with one or more of a first reference resource and a second reference resource, the first reference resource is associated with determining a channel change, and the second reference resource is associated with determining an interference change.
[0126] In a thirtieth aspect, alone or in combination with one or more of the first through twenty-ninth aspects, process 400 includes receiving one or more configurations for the reference resources, and the one or more configurations for the reference resources include one or more of a first configuration for the first reference resource and a second configuration for the second reference resource.
[0127] In a thirty-first aspect, alone or in combination with one or more of the first through thirtieth aspects, process 400 includes receiving a configuration for transmitting the CSI report periodically, semi-persistently, or aperiodically.
[0128] In a thirty-second aspect, alone or in combination with one or more of the first through thirty-first aspects, process 400 includes receiving a configuration for one or more event triggers for transmitting the CSI report, and the CSI report is transmitted in accordance with the one or more event triggers.
[0129] In a thirty-third aspect, alone or in combination with one or more of the first through thirty-second aspects, at least one of the one or more event triggers is associated with a channel change threshold or an interference threshold.
[0130] In a thirty-fourth aspect, alone or in combination with one or more of the first through thirty-third aspects, at least one of the channel change threshold or the interference threshold for the one or more event triggers is different from at least one of a channel change threshold or interference threshold for determining the change information.
[0131] In a thirty-fifth aspect, alone or in combination with one or more of the first through thirty-fourth aspects, the channel change threshold for the one or more event triggers is associated with a difference in a power of a channel of at least one antenna pair, and the channel change threshold for determining the change information corresponds to an average power across all transmitter ports and receiver antennas.
[0132] In a thirty-sixth aspect, alone or in combination with one or more of the first through thirty-fifth aspects, the interference threshold for the one or more event triggers is associated with a sum power of a diagonal term of a noise-plus-interference covariance matrix, and the interference threshold for determining the change information corresponds to a difference in an interference-plus-noise power.
[0133] In a thirty-seventh aspect, alone or in combination with one or more of the first through thirty-sixth aspects, the channel change threshold or the interference threshold for the one or more event triggers is associated with a CQI threshold, and the channel change threshold or the interference threshold for determining the change information corresponds to a threshold different from the CQI threshold.
[0134] In a thirty-eighth aspect, alone or in combination with one or more of the first through thirty-seventh aspects, process 400 includes receiving a configuration or pre-configuration for transmitting the CSI report in accordance with the one or more event triggers.
[0135] In a thirty-ninth aspect, alone or in combination with one or more of the first through thirty-eighth aspects, process 400 includes transmitting an event indication, on a first uplink resource, associated with at least one of the one or more event triggers, and the CSI report is transmitted on a second uplink resource.
[0136] In a fortieth aspect, alone or in combination with one or more of the first through thirty-ninth aspects, process 400 includes transmitting an event indication associated with at least one of the one or more event triggers, and the event indication is transmitted via a MAC-CE.
[0137] In a forty-first aspect, alone or in combination with one or more of the first through fortieth aspects, the change information is associated with one or more of a frequency domain difference, a time domain difference, or a spatial domain difference.
[0138] In a forty-second aspect, alone or in combination with one or more of the first through forty-first aspects, the time domain difference is associated with an instantaneous channel estimate or an average channel estimate.
[0139] In a forty-third aspect, alone or in combination with one or more of the first through forty-second aspects, the average channel estimate is determined in accordance with an averaging window.
[0140] In a forty-fourth aspect, alone or in combination with one or more of the first through forty-third aspects, the averaging window for the average channel estimate is different from an averaging window associated with the CSI report.
[0141] In a forty-fifth aspect, alone or in combination with one or more of the first through forty-fourth aspects, the frequency domain difference is associated with one or more of a frequency difference for a single subband, an average frequency difference over a subset of subbands, or an average frequency difference over all subbands.
[0142] In a forty-sixth aspect, alone or in combination with one or more of the first through forty-fifth aspects, the change information is associated with the single subband, and the CSI report is associated with the single subband.
[0143] In a forty-seventh aspect, alone or in combination with one or more of the first through forty-sixth aspects, the change information is associated with the subset of subbands or all subbands, and the CSI report is a wideband report.
[0144] In a forty-eighth aspect, alone or in combination with one or more of the first through forty-seventh aspects, the spatial domain difference is determined in accordance with one or more of a single codebook, an average of a subset of codebooks, or an average of all codebooks.
[0145] In a forty-ninth aspect, alone or in combination with one or more of the first through forty-eighth aspects, the CSI report is transmitted via a MAC-CE.
[0146] In a fiftieth aspect, alone or in combination with one or more of the first through forty-ninth aspects, the change information is associated with a difference between a first term and a second term, the first term is associated with one or more of a measured channel characteristic with respect to one or more historical occasions or one or more predicted channel characteristics with respect to one or more future occasions of the first term, the first term is associated with one or more measurement resources of the CSI report, the second term is associated with one or more predicted channel characteristics with respect to one or more future occasions of the second term, and the one or more future occasions of the second term occur after the one or more historical occasions or the one or more future occasions of the first term.
[0147] In a fifty-first aspect, alone or in combination with one or more of the first through fiftieth aspects, the measured channel characteristic or each of the one or more predicted channel characteristics of the first term are associated with one or more of a rank indicator, a channel quality indicator, or a precoding matrix indicator.
[0148] In a fifty-second aspect, alone or in combination with one or more of the first through fifty-first aspects, the one or more future occasions of the second term occur after a reference resource associated with the CSI report.
[0149] In a fifty-third aspect, alone or in combination with one or more of the first through fifty-second aspects, the one or more historical occasions occur no later than a reference resource associated with the CSI report.
[0150] In a fifty-fourth aspect, alone or in combination with one or more of the first through fifty-third aspects, process 400 includes receiving a configuration for at least one of the one or more historical occasions, the one or more future occasions associated with the first term, or the future occasions associated with the second term.
[0151] In a fifty-fifth aspect, alone or in combination with one or more of the first through fifty-fourth aspects, at least one of the one or more historical occasions, the one or more future occasions associated with the first term, or the future occasions associated with the second term is included in the CSI report.
[0152] Although Fig. 4 shows example blocks of process 400, in some aspects, process 400 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 4. Additionally, or alternatively, two or more of the blocks of process 400 may be performed in parallel.
[0153] Fig. 5 is a diagram illustrating an example process 500 performed, for example, at a network node or an apparatus of a network node, in accordance with the present disclosure. Example process 500 is an example where the apparatus or the network node (e.g., network node 110) performs operations associated with reporting a change in CSI.
[0154] As shown in Fig. 5, in some aspects, process 500 may include transmitting one or more channel measurement resources or one or more interference measurement resources (block 510) . For example, the network node (e.g., using transmission component 704 and / or communication manager 706, depicted in Fig. 7) may transmit one or more channel measurement resources or one or more interference measurement resources, and / or a combination thereof, among other examples, as described above.
[0155] As further shown in Fig. 5, in some aspects, process 500 may include receiving, from a UE, a CSI report that includes change information associated with a difference between a CSI value and a reference value (block 520) . For example, the network node (e.g., using reception component 702 and / or communication manager 706, depicted in Fig. 7) may receive, from a UE, a CSI report that includes change information associated with a difference between a CSI value and a reference value, as described above.
[0156] Process 500 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.
[0157] In a first aspect, the change information includes one or more bits indicating a reason for a difference between the CSI value and the reference value.
[0158] In a second aspect, alone or in combination with the first aspect, the reason for the difference between the CSI value and the reference value includes one or more of a channel change or an interference change.
[0159] In a third aspect, alone or in combination with one or more of the first and second aspects, the change information includes one or more bits indicating one or more of a channel delta or an Rnn delta.
[0160] In a fourth aspect, alone or in combination with one or more of the first through third aspects, the channel delta is one of a difference in a matrix or a vector of a channel power of different Tx-Rx antenna pairs, a difference in a sum power of a channel for all Tx-Rx antenna pairs, a difference in an average power across all transmitter ports and receiver antennas, a difference in a vector of eigenvalues of a channel, or a difference in a strongest eigenvalue or group of strongest eigenvalues of the channel.
[0161] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the Rnn delta is one or more of a difference in an Rnn, a difference in a sum power of diagonal terms of the Rnn, or a difference in an interference-plus-noise power average across multiple receiver antennas.
[0162] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the change information indicates whether the difference between the CSI value and the reference value exceeds a threshold.
[0163] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the threshold is a channel change threshold or an interference threshold.
[0164] In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the change information includes two or more bits indicating that the difference between the CSI value and the reference value exceeds the threshold, does not exceed the threshold, or is the same as the threshold.
[0165] In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the change information includes two bits or four bits to indicate that a channel delta exceeds a channel change threshold, does not exceed the channel change threshold, or is the same as the channel change threshold.
[0166] In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the change information includes two bits or four bits to indicate that an interference delta exceeds an interference threshold, does not exceed the interference threshold, or is the same as the interference threshold.
[0167] In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, the change information includes two bits to indicate that a channel delta exceeds a channel change threshold, does not exceed the channel change threshold, or is the same as the channel change threshold, and two bits to indicate that an interference delta exceeds an interference threshold, does not exceed the interference threshold, or is the same as the interference threshold.
[0168] In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, the change information indicates one or more of range of a channel change or a range of an interference change, and one or more of the range of the channel change or the range of the interference change are defined in accordance with a lower threshold value and an upper threshold value.
[0169] In a thirteenth aspect, alone or in combination with one or more of the first through twelfth aspects, process 500 includes receiving, from the UE, an indication of one or more of the lower threshold value or the upper threshold value.
[0170] In a fourteenth aspect, alone or in combination with one or more of the first through thirteenth aspects, one or more of the lower threshold value or the upper threshold value are predefined or configured in a table that associates the lower threshold value and the upper threshold value to one or more threshold index values, and receiving the indication of one or more of the lower threshold value or the upper threshold value includes receiving, from the UE, the one or more threshold index values.
[0171] In a fifteenth aspect, alone or in combination with one or more of the first through fourteenth aspects, process 500 includes outputting, to the UE, a configuration identifying one or more metrics associated with the change information.
[0172] In a sixteenth aspect, alone or in combination with one or more of the first through fifteenth aspects, process 500 includes receiving, from the UE, signaling that indicates a metric to be used for defining the change information.
[0173] In a seventeenth aspect, alone or in combination with one or more of the first through sixteenth aspects, the change information is associated with an SINR corresponding to a scheduled MCS and an SINR of a demodulated signal.
[0174] In an eighteenth aspect, alone or in combination with one or more of the first through seventeenth aspects, process 500 includes receiving, from the UE, the change information as a result of the SINR of the demodulated signal exceeding an SINR threshold.
[0175] In a nineteenth aspect, alone or in combination with one or more of the first through eighteenth aspects, process 500 includes outputting, to the UE, an updated MCS in accordance with the change information indicating that the SINR of the demodulated signal exceeds the SINR threshold.
[0176] In a twentieth aspect, alone or in combination with one or more of the first through nineteenth aspects, process 500 includes outputting, to the UE, a CSI report configuration having a report quantity parameter associated with the change information, and receiving the CSI report includes receiving the CSI report in accordance with the report quantity parameter.
[0177] In a twenty-first aspect, alone or in combination with one or more of the first through twentieth aspects, receiving the CSI report in accordance with the report quantity parameter includes receiving the CSI report without a channel quality indicator, a rank indicator, a precoding matrix indicator, a layer indicator, channel measurement information, interference information, beam quality metrics, codebook information, or timing and configuration information.
[0178] In a twenty-second aspect, alone or in combination with one or more of the first through twenty-first aspects, receiving the CSI report in accordance with the report quantity parameter includes receiving the CSI report with one or more of a channel quality indicator, a rank indicator, a precoding matrix indicator, a layer indicator, channel measurement information, interference information, beam quality metrics, codebook information, or timing and configuration information.
[0179] In a twenty-third aspect, alone or in combination with one or more of the first through twenty-second aspects, the reference value is associated with a most recent CSI report before the CSI report that includes the change information.
[0180] In a twenty-fourth aspect, alone or in combination with one or more of the first through twenty-third aspects, the most recent CSI report is associated with a periodic, semi-persistent, or aperiodic CSI reporting configuration.
[0181] In a twenty-fifth aspect, alone or in combination with one or more of the first through twenty-fourth aspects, the most recent CSI report and the CSI report that includes the change information have one or more of a same reporting type, a same report quantity, a same wideband or subband reporting characteristic, a same CSI codebook type, a same measurement resource, a same beam or transmission configuration information state, or a same component carrier.
[0182] In a twenty-sixth aspect, alone or in combination with one or more of the first through twenty-fifth aspects, the most recent CSI report is associated with a reference resource, and the reference resource is a measurement resource that occurs before a measurement resource used to determine the change information.
[0183] In a twenty-seventh aspect, alone or in combination with one or more of the first through twenty-sixth aspects, process 500 includes outputting, to the UE, a configuration or indication associated with the reference resource.
[0184] In a twenty-eighth aspect, alone or in combination with one or more of the first through twenty-seventh aspects, the most recent CSI report is associated with one or more of a first reference resource and a second reference resource, the first reference resource is associated with a channel change measurement, and the second reference resource is associated with an interference change measurement.
[0185] In a twenty-ninth aspect, alone or in combination with one or more of the first through twenty-eighth aspects, process 500 includes outputting, to the UE, one or more configurations for the reference resources, and the one or more configurations for the reference resources include one or more of a first configuration for the first reference resource and a second configuration for the second reference resource.
[0186] In a thirtieth aspect, alone or in combination with one or more of the first through twenty-ninth aspects, process 500 includes outputting, to the UE, a configuration for transmitting the CSI report periodically, semi-persistently, or aperiodically.
[0187] In a thirty-first aspect, alone or in combination with one or more of the first through thirtieth aspects, process 500 includes outputting, to the UE, a configuration for one or more event triggers for transmitting the CSI report, and the CSI report is transmitted in accordance with the one or more event triggers.
[0188] In a thirty-second aspect, alone or in combination with one or more of the first through thirty-first aspects, at least one of the one or more event triggers is associated with a channel change threshold or an interference threshold.
[0189] In a thirty-third aspect, alone or in combination with one or more of the first through thirty-second aspects, at least one of the channel change threshold or the interference threshold for the one or more event triggers is different from at least one of a channel change threshold or interference threshold associated with the change information.
[0190] In a thirty-fourth aspect, alone or in combination with one or more of the first through thirty-third aspects, the channel change threshold for the one or more event triggers is associated with a difference in a power of a channel of at least one antenna pair, and the channel change threshold associated with the change information corresponds to an average power across all transmitter ports and receiver antennas.
[0191] In a thirty-fifth aspect, alone or in combination with one or more of the first through thirty-fourth aspects, the interference threshold for the one or more event triggers is associated with a sum power of a diagonal term of a noise-plus-interference covariance matrix, and the interference threshold for the change information corresponds to a difference in an interference-plus-noise power.
[0192] In a thirty-sixth aspect, alone or in combination with one or more of the first through thirty-fifth aspects, the channel change threshold or the interference threshold for the one or more event triggers is associated with a CQI threshold, and the channel change threshold or the interference threshold for the change information corresponds to a threshold different from the CQI threshold.
[0193] In a thirty-seventh aspect, alone or in combination with one or more of the first through thirty-sixth aspects, process 500 includes outputting, to the UE, a configuration or pre-configuration for the UE to transmit the CSI report in accordance with the one or more event triggers.
[0194] In a thirty-eighth aspect, alone or in combination with one or more of the first through thirty-seventh aspects, process 500 includes receiving an event indication, on a first uplink resource, associated with at least one of the one or more event triggers, and the CSI report is received on a second uplink resource.
[0195] In a thirty-ninth aspect, alone or in combination with one or more of the first through thirty-eighth aspects, process 500 includes receiving an event indication associated with at least one of the one or more event triggers, and the event indication is received via a MAC-CE.
[0196] In a fortieth aspect, alone or in combination with one or more of the first through thirty-ninth aspects, the change information is associated with one or more of a frequency domain difference, a time domain difference, or a spatial domain difference.
[0197] In a forty-first aspect, alone or in combination with one or more of the first through fortieth aspects, the time domain difference is associated with an instantaneous channel estimate or an average channel estimate.
[0198] In a forty-second aspect, alone or in combination with one or more of the first through forty-first aspects, the average channel estimate is associated with an averaging window.
[0199] In a forty-third aspect, alone or in combination with one or more of the first through forty-second aspects, the averaging window for the average channel estimate is different from an averaging window associated with the CSI report.
[0200] In a forty-fourth aspect, alone or in combination with one or more of the first through forty-third aspects, the frequency domain difference is associated with one or more of a frequency difference for a single subband, an average frequency difference over a subset of subbands, or an average frequency difference over all subbands.
[0201] In a forty-fifth aspect, alone or in combination with one or more of the first through forty-fourth aspects, the change information is associated with the single subband, and the CSI report is associated with the single subband.
[0202] In a forty-sixth aspect, alone or in combination with one or more of the first through forty-fifth aspects, the change information is associated with the subset of subbands or all subbands, and the CSI report is a wideband report.
[0203] In a forty-seventh aspect, alone or in combination with one or more of the first through forty-sixth aspects, the spatial domain difference is associated with one or more of a single codebook, an average of a subset of codebooks, or an average of all codebooks.
[0204] In a forty-eighth aspect, alone or in combination with one or more of the first through forty-seventh aspects, the CSI report is received via a MAC-CE.
[0205] In a forty-ninth aspect, alone or in combination with one or more of the first through forty-eighth aspects, the change information is associated with a difference between a first term and a second term, the first term is associated with one or more of a measured channel characteristic with respect to one or more historical occasions or one or more predicted channel characteristics with respect to one or more future occasions of the first term, the first term is associated with one or more measurement resources of the CSI report, the second term is associated with one or more predicted channel characteristics with respect to one or more future occasions of the second term, and the one or more future occasions of the second term occur after the one or more historical occasions or the one or more future occasions of the first term.
[0206] In a fiftieth aspect, alone or in combination with one or more of the first through forty-ninth aspects, the measured channel characteristic or each of the one or more predicted channel characteristics of the first term are associated with one or more of a rank indicator, a channel quality indicator, or a precoding matrix indicator.
[0207] In a fifty-first aspect, alone or in combination with one or more of the first through fiftieth aspects, the one or more future occasions of the second term occur after a reference resource associated with the CSI report.
[0208] In a fifty-second aspect, alone or in combination with one or more of the first through fifty-first aspects, the one or more historical occasions occur no later than a reference resource associated with the CSI report.
[0209] In a fifty-third aspect, alone or in combination with one or more of the first through fifty-second aspects, process 500 includes outputting, to the UE, a configuration for at least one of the one or more historical occasions, the one or more future occasions associated with the first term, or the future occasions associated with the second term.
[0210] In a fifty-fourth aspect, alone or in combination with one or more of the first through fifty-third aspects, at least one of the one or more historical occasions, the one or more future occasions associated with the first term, or the future occasions associated with the second term is included in the CSI report.
[0211] Although Fig. 5 shows example blocks of process 500, in some aspects, process 500 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 5. Additionally, or alternatively, two or more of the blocks of process 500 may be performed in parallel.
[0212] Fig. 6 is a diagram of an example apparatus 600 for wireless communication, in accordance with the present disclosure. The apparatus 600 may be a UE, or a UE may include the apparatus 600. In some aspects, the apparatus 600 includes a reception component 602, a transmission component 604, and / or a communication manager 606, which may be in communication with one another (for example, via one or more buses and / or one or more other components) . In some aspects, the communication manager 606 is the communication manager 150 described in connection with Fig. 1. As shown, the apparatus 600 may communicate with another apparatus 608, such as a UE or a network node (such as a CU, a DU, an RU, or a base station) , using the reception component 602 and the transmission component 604. The communication manager 606 may be included in, or implemented via, a processing system (for example, the processing system 140 described in connection with Fig. 1) of the UE.
[0213] In some aspects, the apparatus 600 may be configured to perform one or more operations described herein in connection with Fig. 3. Additionally, or alternatively, the apparatus 600 may be configured to perform one or more processes described herein, such as process 400 of Fig. 4. In some aspects, the apparatus 600 and / or one or more components shown in Fig. 6 may include one or more components of the UE described in connection with Fig. 1. Additionally, or alternatively, one or more components shown in Fig. 6 may be implemented within one or more components described in connection with Fig. 1. 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.
[0214] The reception component 602 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 608. The reception component 602 may provide received communications to one or more other components of the apparatus 600. In some aspects, the reception component 602 may perform signal processing on the received communications, and may provide the processed signals to the one or more other components of the apparatus 600. In some aspects, the reception component 602 may include one or more components of the UE described above in connection with Fig. 1, such as a radio, one or more RF chains, one or more transceivers, or one or more modems, each of which may in turn be coupled with one or more antennas of the UE.
[0215] The transmission component 604 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 608. In some aspects, one or more other components of the apparatus 600 may generate communications and may provide the generated communications to the transmission component 604 for transmission to the apparatus 608. In some aspects, the transmission component 604 may perform signal processing on the generated communications, and may transmit the processed signals to the apparatus 608. In some aspects, the transmission component 604 may include one or more components of the UE described above in connection with Fig. 1, such as a radio, one or more RF chains, one or more transceivers, or one or more modems, each of which may in turn be coupled with one or more antennas of the UE described in connection with Fig. 1. In some aspects, the transmission component 604 may be co-located with the reception component 602.
[0216] The communication manager 606 may support operations of the reception component 602 and / or the transmission component 604. For example, the communication manager 606 may receive information associated with configuring reception of communications by the reception component 602 and / or transmission of communications by the transmission component 604. Additionally, or alternatively, the communication manager 606 may generate and / or provide control information to the reception component 602 and / or the transmission component 604 to control reception and / or transmission of communications.
[0217] The reception component 602 may receive one or more channel measurement resources or one or more interference measurement resources. The transmission component 604 may transmit a CSI report that includes change information associated with a difference between a CSI value and a reference value. The transmission component 604 may transmit an indication of one or more of the lower threshold value or the upper threshold value. The reception component 602 may receive a configuration identifying one or more metrics associated with the change information. The transmission component 604 may transmit signaling that indicates a metric to be used for defining the change information. The communication manager 606 may compare the SINR of the demodulated signal to an SINR threshold transmitting the change information as a result of the SINR of the demodulated signal exceeding the SINR threshold. The reception component 602 may receive an updated MCS in accordance with the change information indicating that the SINR of the demodulated signal exceeds the SINR threshold. The communication manager 606 may detect the difference between a CSI value and the reference value. The transmission component 604 may transmit the CSI report as a result of detecting the difference between the CSI value and the reference value. The reception component 602 may receive a CSI report configuration having a report quantity parameter associated with the change information. The reception component 602 may receive a configuration or indication associated with the reference resource. The reception component 602 may receive one or more configurations for the reference resources, and the one or more configurations for the reference resources include one or more of a first configuration for the first reference resource and a second configuration for the second reference resource. The reception component 602 may receive a configuration for transmitting the CSI report periodically, semi-persistently, or aperiodically. The reception component 602 may receive a configuration for one or more event triggers for transmitting the CSI report, and the CSI report is transmitted in accordance with the one or more event triggers. The reception component 602 may receive a configuration or pre-configuration for transmitting the CSI report in accordance with the one or more event triggers. The transmission component 604 may transmit an event indication, on a first uplink resource, associated with at least one of the one or more event triggers, and the CSI report is transmitted on a second uplink resource. The transmission component 604 may transmit an event indication associated with at least one of the one or more event triggers, and the event indication is transmitted via a MAC-CE. The reception component 602 may receive a configuration for at least one of the one or more historical occasions, the one or more future occasions associated with the first component, or the future occasions associated with the second component.
[0218] The number and arrangement of components shown in Fig. 6 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 6. Furthermore, two or more components shown in Fig. 6 may be implemented within a single component, or a single component shown in Fig. 6 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 6 may perform one or more functions described as being performed by another set of components shown in Fig. 6.
[0219] Fig. 7 is a diagram of an example apparatus 700 for wireless communication, in accordance with the present disclosure. The apparatus 700 may be a network node, or a network node may include the apparatus 700. In some aspects, the apparatus 700 includes a reception component 702, a transmission component 704, and / or a communication manager 706, which may be in communication with one another (for example, via one or more buses and / or one or more other components) . In some aspects, the communication manager 706 is the communication manager 155 described in connection with Fig. 1. As shown, the apparatus 700 may communicate with another apparatus 708, such as a UE or a network node (such as a CU, a DU, an RU, or a base station) , using the reception component 702 and the transmission component 704. The communication manager 706 may be included in, or implemented via, a processing system (for example, the processing system 145 described in connection with Fig. 1) of the network node.
[0220] In some aspects, the apparatus 700 may be configured to perform one or more operations described herein in connection with Fig. 3. Additionally, or alternatively, the apparatus 700 may be configured to perform one or more processes described herein, such as process 500 of Fig. 5. In some aspects, the apparatus 700 and / or one or more components shown in Fig. 7 may include one or more components of the network node described in connection with Fig. 1. Additionally, or alternatively, one or more components shown in Fig. 7 may be implemented within one or more components described in connection with Fig. 1. 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.
[0221] The reception component 702 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 708. The reception component 702 may provide received communications to one or more other components of the apparatus 700. In some aspects, the reception component 702 may perform signal processing on the received communications, and may provide the processed signals to the one or more other components of the apparatus 700. In some aspects, the reception component 702 may include one or more components of the network node described above in connection with Fig. 1, such as a radio, one or more RF chains, one or more transceivers, or one or more modems, each of which may in turn be coupled with one or more antennas of the network node. In some aspects, the reception component 702 and / or the transmission component 704 may include or may be included in a network interface. The network interface may be configured to obtain and / or output signals for the apparatus 700 via one or more communications links, such as a backhaul link, a midhaul link, and / or a fronthaul link.
[0222] The transmission component 704 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 708. In some aspects, one or more other components of the apparatus 700 may generate communications and may provide the generated communications to the transmission component 704 for transmission to the apparatus 708. In some aspects, the transmission component 704 may perform signal processing on the generated communications, and may transmit the processed signals to the apparatus 708. In some aspects, the transmission component 704 may include one or more components of the network node described above in connection with Fig. 1, such as a radio, one or more RF chains, one or more transceivers, or one or more modems, each of which may in turn be coupled with one or more antennas of the network node described in connection with Fig. 1. In some aspects, the transmission component 704 may be co-located with the reception component 702.
[0223] The communication manager 706 may support operations of the reception component 702 and / or the transmission component 704. For example, the communication manager 706 may receive information associated with configuring reception of communications by the reception component 702 and / or transmission of communications by the transmission component 704. Additionally, or alternatively, the communication manager 706 may generate and / or provide control information to the reception component 702 and / or the transmission component 704 to control reception and / or transmission of communications.
[0224] The transmission component 704 may transmit one or more channel measurement resources or one or more interference measurement resources. The reception component 702 may receive, from a UE, a CSI report that includes change information associated with a difference between a CSI value and a reference value. The reception component 702 may receive, from the UE, an indication of one or more of the lower threshold value or the upper threshold value. The transmission component 704 may output, to the UE, a configuration identifying one or more metrics associated with the change information. The reception component 702 may receive, from the UE, signaling that indicates a metric to be used for defining the change information. The reception component 702 may receive, from the UE, the change information as a result of the SINR of the demodulated signal exceeding an SINR threshold. The transmission component 704 may output, to the UE, an updated MCS in accordance with the change information indicating that the SINR of the demodulated signal exceeds the SINR threshold. The transmission component 704 may output, to the UE, a CSI report configuration having a report quantity parameter associated with the change information. The transmission component 704 may output, to the UE, a configuration or indication associated with the reference resource. The transmission component 704 may output, to the UE, one or more configurations for the reference resources, and the one or more configurations for the reference resources include one or more of a first configuration for the first reference resource and a second configuration for the second reference resource. The transmission component 704 may output, to the UE, a configuration for transmitting the CSI report periodically, semi-persistently, or aperiodically. The transmission component 704 may output, to the UE, a configuration for one or more event triggers for transmitting the CSI report, and the CSI report is transmitted in accordance with the one or more event triggers. The transmission component 704 may output, to the UE, a configuration or pre-configuration for the UE to transmit the CSI report in accordance with the one or more event triggers. The reception component 702 may receive an event indication, on a first uplink resource, associated with at least one of the one or more event triggers, and the CSI report is received on a second uplink resource. The reception component 702 may receive an event indication associated with at least one of the one or more event triggers, and the event indication is received via a MAC-CE. The transmission component 704 may output, to the UE, a configuration for at least one of the one or more historical occasions, the one or more future occasions associated with the first term, or the future occasions associated with the second term.
[0225] The number and arrangement of components shown in Fig. 7 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 7. Furthermore, two or more components shown in Fig. 7 may be implemented within a single component, or a single component shown in Fig. 7 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 7 may perform one or more functions described as being performed by another set of components shown in Fig. 7.
[0226] The following provides an overview of some Aspects of the present disclosure:
[0227] Aspect 1: A method of wireless communication performed by a UE, comprising: receiving one or more channel measurement resources or one or more interference measurement resources; and transmitting a CSI report that includes change information associated with a difference between a CSI value and a reference value.
[0228] Aspect 2: The method of Aspect 1, wherein the change information includes one or more bits indicating a reason for the difference between the CSI value and the reference value.
[0229] Aspect 3: The method of Aspect 2, wherein the reason for the difference between the CSI value and the reference value includes one or more of a channel change or an interference change.
[0230] Aspect 4: The method of any of Aspects 1-3, wherein the change information includes one or more bits indicating one or more of a channel delta or an Rnn delta.
[0231] Aspect 5: The method of Aspect 4, wherein the channel delta is one of a difference in a matrix or a vector of a channel power of different Tx-Rx antenna pairs, a difference in a sum power of a channel for all Tx-Rx antenna pairs, a difference in an average power across all transmitter ports and receiver antennas, a difference in a vector of eigenvalues of a channel, or a difference in a strongest eigenvalue or group of strongest eigenvalues of the channel.
[0232] Aspect 6: The method of Aspect 4, wherein the Rnn delta is one or more of a difference in an Rnn, a difference in a sum power of diagonal terms of the Rnn, or a difference in an interference-plus-noise power average across multiple receiver antennas.
[0233] Aspect 7: The method of any of Aspects 1-6, wherein the change information indicates whether the difference between the CSI value and the reference value exceeds a threshold.
[0234] Aspect 8: The method of Aspect 7, wherein the threshold is a channel change threshold or an interference threshold.
[0235] Aspect 9: The method of Aspect 7, wherein the change information includes two or more bits indicating that the difference between the CSI value and the reference value exceeds the threshold, does not exceed the threshold, or is the same as the threshold.
[0236] Aspect 10: The method of Aspect 9, wherein the change information includes two bits or four bits to indicate that a channel delta exceeds a channel change threshold, does not exceed the channel change threshold, or is the same as the channel change threshold.
[0237] Aspect 11: The method of Aspect 9, wherein the change information includes two bits or four bits to indicate that an interference delta exceeds an interference threshold, does not exceed the interference threshold, or is the same as the interference threshold.
[0238] Aspect 12: The method of Aspect 9, wherein the change information includes: two bits to indicate that a channel delta exceeds a channel change threshold, does not exceed the channel change threshold, or is the same as the channel change threshold; and two bits to indicate that an interference delta exceeds an interference threshold, does not exceed the interference threshold, or is the same as the interference threshold.
[0239] Aspect 13: The method of any of Aspects 1-12, wherein the change information indicates one or more of range of a channel change or a range of an interference change, and wherein one or more of the range of the channel change or the range of the interference change are defined in accordance with a lower threshold value and an upper threshold value.
[0240] Aspect 14: The method of Aspect 13, further comprising transmitting an indication of one or more of the lower threshold value or the upper threshold value.
[0241] Aspect 15: The method of Aspect 13, wherein one or more of the lower threshold value or the upper threshold value are predefined or configured in a table that associates the lower threshold value and the upper threshold value to one or more threshold index values, and wherein transmitting the indication of one or more of the lower threshold value or the upper threshold value includes transmitting the one or more threshold index values.
[0242] Aspect 16: The method of any of Aspects 1-15, further comprising receiving a configuration identifying one or more metrics associated with the change information.
[0243] Aspect 17: The method of any of Aspects 1-16, further comprising transmitting signaling that indicates a metric to be used for defining the change information.
[0244] Aspect 18: The method of any of Aspects 1-17, wherein the change information is associated with an SINR corresponding to a scheduled MCS and an SINR of a demodulated signal.
[0245] Aspect 19: The method of Aspect 18, further comprising: comparing the SINR of the demodulated signal to an SINR threshold; and transmitting the change information as a result of the SINR of the demodulated signal exceeding the SINR threshold.
[0246] Aspect 20: The method of Aspect 19, further comprising receiving an updated MCS in accordance with the change information indicating that the SINR of the demodulated signal exceeds the SINR threshold.
[0247] Aspect 21: The method of any of Aspects 1-20, further comprising: detecting the difference between a CSI value and the reference value; and transmitting the CSI report includes transmitting the CSI report as a result of detecting the difference between the CSI value and the reference value.
[0248] Aspect 22: The method of any of Aspects 1-21, further comprising: receiving a CSI report configuration having a report quantity parameter associated with the change information; and wherein transmitting the CSI report includes transmitting the CSI report in accordance with the report quantity parameter. wherein transmitting the CSI report includes transmitting the CSI report in accordance with the report quantity parameter.
[0249] Aspect 23: The method of Aspect 22, wherein transmitting the CSI report in accordance with the report quantity parameter includes transmitting the CSI report without a channel quality indicator, a rank indicator, a precoding matrix indicator, a layer indicator, channel measurement information, interference information, beam quality metrics, codebook information, or timing and configuration information.
[0250] Aspect 24: The method of Aspect 22, wherein transmitting the CSI report in accordance with the report quantity parameter includes transmitting the CSI report with one or more of a channel quality indicator, a rank indicator, a precoding matrix indicator, a layer indicator, channel measurement information, interference information, beam quality metrics, codebook information, or timing and configuration information.
[0251] Aspect 25: The method of any of Aspects 1-24, wherein the reference value is associated with a most recent CSI report before the CSI report that includes the change information.
[0252] Aspect 26: The method of Aspect 25, wherein the most recent CSI report is associated with a periodic, semi-persistent, or aperiodic CSI reporting configuration.
[0253] Aspect 27: The method of Aspect 25, wherein the most recent CSI report and the CSI report that includes the change information have one or more of a same reporting type, a same report quantity, a same wideband or subband reporting characteristic, a same CSI codebook type, a same measurement resource, a same beam or transmission configuration information state, or a same component carrier.
[0254] Aspect 28: The method of Aspect 25, wherein the most recent CSI report is associated with a reference resource, wherein the reference resource is a measurement resource that occurs before a measurement resource used to determine the change information.
[0255] Aspect 29: The method of Aspect 28, further comprising receiving a configuration or indication associated with the reference resource.
[0256] Aspect 30: The method of Aspect 25, wherein the most recent CSI report is associated with one or more of a first reference resource and a second reference resource, wherein the first reference resource is associated with determining a channel change, and wherein the second reference resource is associated with determining an interference change.
[0257] Aspect 31: The method of Aspect 30, further comprising receiving one or more configurations for the reference resources, wherein the one or more configurations for the reference resources include one or more of a first configuration for the first reference resource and a second configuration for the second reference resource.
[0258] Aspect 32: The method of any of Aspects 1-31, further comprising receiving a configuration for transmitting the CSI report periodically, semi-persistently, or aperiodically.
[0259] Aspect 33: The method of any of Aspects 1-32, further comprising receiving a configuration for one or more event triggers for transmitting the CSI report; and wherein the CSI report is transmitted in accordance with the one or more event triggers.
[0260] Aspect 34: The method of Aspect 33, wherein at least one of the one or more event triggers is associated with a channel change threshold or an interference threshold.
[0261] Aspect 35: The method of Aspect 34, wherein at least one of the channel change threshold or the interference threshold for the one or more event triggers is different from at least one of a channel change threshold or interference threshold for determining the change information.
[0262] Aspect 36: The method of Aspect 35, wherein the channel change threshold for the one or more event triggers is associated with a difference in a power of a channel of at least one antenna pair, and wherein the channel change threshold for determining the change information corresponds to an average power across all transmitter ports and receiver antennas.
[0263] Aspect 37: The method of Aspect 35, wherein the interference threshold for the one or more event triggers is associated with a sum power of a diagonal term of a noise-plus-interference covariance matrix, and wherein the interference threshold for determining the change information corresponds to a difference in an interference-plus-noise power.
[0264] Aspect 38: The method of Aspect 35, wherein the channel change threshold or the interference threshold for the one or more event triggers is associated with a CQI threshold, and wherein the channel change threshold or the interference threshold for determining the change information corresponds to a threshold different from the CQI threshold.
[0265] Aspect 39: The method of Aspect 33, further comprising receiving a configuration or pre-configuration for transmitting the CSI report in accordance with the one or more event triggers.
[0266] Aspect 40: The method of Aspect 33, further comprising transmitting an event indication, on a first uplink resource, associated with at least one of the one or more event triggers; and wherein the CSI report is transmitted on a second uplink resource.
[0267] Aspect 41: The method of Aspect 33, further comprising transmitting an event indication associated with at least one of the one or more event triggers, wherein the event indication is transmitted via a MAC-CE.
[0268] Aspect 42: The method of any of Aspects 1-41, wherein the change information is associated with one or more of a frequency domain difference, a time domain difference, or a spatial domain difference.
[0269] Aspect 43: The method of Aspect 42, wherein the time domain difference is associated with an instantaneous channel estimate or an average channel estimate.
[0270] Aspect 44: The method of Aspect 43, wherein the average channel estimate is determined in accordance with an averaging window.
[0271] Aspect 45: The method of Aspect 44, wherein the averaging window for the average channel estimate is different from an averaging window associated with the CSI report.
[0272] Aspect 46: The method of Aspect 42, wherein the frequency domain difference is associated with one or more of a frequency difference for a single subband, an average frequency difference over a subset of subbands, or an average frequency difference over all subbands.
[0273] Aspect 47: The method of Aspect 46, wherein the change information is associated with the single subband, and wherein the CSI report is associated with the single subband.
[0274] Aspect 48: The method of Aspect 46, wherein the change information is associated with the subset of subbands or all subbands, and wherein the CSI report is a wideband report.
[0275] Aspect 49: The method of Aspect 42, wherein the spatial domain difference is determined in accordance with one or more of a single codebook, an average of a subset of codebooks, or an average of all codebooks.
[0276] Aspect 50: The method of any of Aspects 1-49, wherein the CSI report is transmitted via a MAC-CE.
[0277] Aspect 51: The method of any of Aspects 1-50, wherein the change information is associated with a difference between a first term and a second term; wherein the first term is associated with one or more of a measured channel characteristic in accordance with one or more historical occasions or one or more predicted channel characteristics in accordance with one or more first term future occasions, wherein the first term is associated with one or more measurement resources of the CSI report; wherein the second term is associated with one or more predicted channel characteristics in accordance with one or more second term future occasions; and wherein the one or more second term future occasions occur after the one or more historical occasions or the one or more first term future occasions.
[0278] Aspect 52: The method of Aspect 51, wherein the measured channel characteristic or each of the one or more predicted channel characteristics of the first term are associated with one or more of a rank indicator, a channel quality indicator, or a precoding matrix indicator.
[0279] Aspect 53: The method of Aspect 51, wherein the one or more future occasions of the second term occur after a reference resource associated with the CSI report.
[0280] Aspect 54: The method of Aspect 51, wherein the one or more historical occasions occur no later than a reference resource associated with the CSI report.
[0281] Aspect 55: The method of Aspect 51, further comprising receiving a configuration for at least one of the one or more historical occasions, the one or more future occasions associated with the first term, or the future occasions associated with the second term.
[0282] Aspect 56: The method of Aspect 51, wherein at least one of the one or more historical occasions, the one or more future occasions associated with the first term, or the future occasions associated with the second term is included in the CSI report.
[0283] Aspect 57: A method of wireless communication performed by a network node, comprising: transmitting one or more channel measurement resources or one or more interference measurement resources; and receiving, from a UE, a CSI report that includes change information associated with a difference between a CSI value and a reference value.
[0284] Aspect 58: The method of Aspect 57, wherein the change information includes one or more bits indicating a reason for a difference between the CSI value and the reference value.
[0285] Aspect 59: The method of Aspect 58, wherein the reason for the difference between the CSI value and the reference value includes one or more of a channel change or an interference change.
[0286] Aspect 60: The method of any of Aspects 57-59, wherein the change information includes one or more bits indicating one or more of a channel delta or an Rnn delta.
[0287] Aspect 61: The method of Aspect 60, wherein the channel delta is one of a difference in a matrix or a vector of a channel power of different Tx-Rx antenna pairs, a difference in a sum power of a channel for all Tx-Rx antenna pairs, a difference in an average power across all transmitter ports and receiver antennas, a difference in a vector of eigenvalues of a channel, or a difference in a strongest eigenvalue or group of strongest eigenvalues of the channel.
[0288] Aspect 62: The method of Aspect 60, wherein the Rnn delta is one or more of a difference in an Rnn, a difference in a sum power of diagonal terms of the Rnn, or a difference in an interference-plus-noise power average across multiple receiver antennas.
[0289] Aspect 63: The method of any of Aspects 57-62, wherein the change information indicates whether the difference between the CSI value and the reference value exceeds a threshold.
[0290] Aspect 64: The method of Aspect 63, wherein the threshold is a channel change threshold or an interference threshold.
[0291] Aspect 65: The method of Aspect 63, wherein the change information includes two or more bits indicating that the difference between the CSI value and the reference value exceeds the threshold, does not exceed the threshold, or is the same as the threshold.
[0292] Aspect 66: The method of Aspect 65, wherein the change information includes two bits or four bits to indicate that a channel delta exceeds a channel change threshold, does not exceed the channel change threshold, or is the same as the channel change threshold.
[0293] Aspect 67: The method of Aspect 65, wherein the change information includes two bits or four bits to indicate that an interference delta exceeds an interference threshold, does not exceed the interference threshold, or is the same as the interference threshold.
[0294] Aspect 68: The method of Aspect 65, wherein the change information includes: two bits to indicate that a channel delta exceeds a channel change threshold, does not exceed the channel change threshold, or is the same as the channel change threshold; and two bits to indicate that an interference delta exceeds an interference threshold, does not exceed the interference threshold, or is the same as the interference threshold.
[0295] Aspect 69: The method of any of Aspects 57-68, wherein the change information indicates one or more of range of a channel change or a range of an interference change, and wherein one or more of the range of the channel change or the range of the interference change are defined in accordance with a lower threshold value and an upper threshold value.
[0296] Aspect 70: The method of Aspect 69, further comprising receiving, from the UE, an indication of one or more of the lower threshold value or the upper threshold value.
[0297] Aspect 71: The method of Aspect 69, wherein one or more of the lower threshold value or the upper threshold value are predefined or configured in a table that associates the lower threshold value and the upper threshold value to one or more threshold index values, and wherein receiving the indication of one or more of the lower threshold value or the upper threshold value includes receiving, from the UE, the one or more threshold index values.
[0298] Aspect 72: The method of any of Aspects 57-71, further comprising outputting, to the UE, a configuration identifying one or more metrics associated with the change information.
[0299] Aspect 73: The method of any of Aspects 57-72, further comprising receiving, from the UE, signaling that indicates a metric to be used for defining the change information.
[0300] Aspect 74: The method of any of Aspects 57-73, wherein the change information is associated with an SINR corresponding to a scheduled MCS and an SINR of a demodulated signal.
[0301] Aspect 75: The method of Aspect 74, further comprising receiving, from the UE, the change information as a result of the SINR of the demodulated signal exceeding an SINR threshold.
[0302] Aspect 76: The method of Aspect 75, further comprising outputting, to the UE, an updated MCS in accordance with the change information indicating that the SINR of the demodulated signal exceeds the SINR threshold.
[0303] Aspect 77: The method of any of Aspects 57-76, further comprising: outputting, to the UE, a CSI report configuration having a report quantity parameter associated with the change information; and wherein receiving the CSI report includes receiving the CSI report in accordance with the report quantity parameter. wherein receiving the CSI report includes receiving the CSI report in accordance with the report quantity parameter.
[0304] Aspect 78: The method of Aspect 77, wherein receiving the CSI report in accordance with the report quantity parameter includes receiving the CSI report without a channel quality indicator, a rank indicator, a precoding matrix indicator, a layer indicator, channel measurement information, interference information, beam quality metrics, codebook information, or timing and configuration information.
[0305] Aspect 79: The method of Aspect 77, wherein receiving the CSI report in accordance with the report quantity parameter includes receiving the CSI report with one or more of a channel quality indicator, a rank indicator, a precoding matrix indicator, a layer indicator, channel measurement information, interference information, beam quality metrics, codebook information, or timing and configuration information.
[0306] Aspect 80: The method of any of Aspects 57-79, wherein the reference value is associated with a most recent CSI report before the CSI report that includes the change information.
[0307] Aspect 81: The method of Aspect 80, wherein the most recent CSI report is associated with a periodic, semi-persistent, or aperiodic CSI reporting configuration.
[0308] Aspect 82: The method of Aspect 80, wherein the most recent CSI report and the CSI report that includes the change information have one or more of a same reporting type, a same report quantity, a same wideband or subband reporting characteristic, a same CSI codebook type, a same measurement resource, a same beam or transmission configuration information state, or a same component carrier.
[0309] Aspect 83: The method of Aspect 80, wherein the most recent CSI report is associated with a reference resource, wherein the reference resource is a measurement resource that occurs before a measurement resource used to determine the change information.
[0310] Aspect 84: The method of Aspect 83, further comprising outputting, to the UE, a configuration or indication associated with the reference resource.
[0311] Aspect 85: The method of Aspect 80, wherein the most recent CSI report is associated with one or more of a first reference resource and a second reference resource, wherein the first reference resource is associated with a channel change measurement, and wherein the second reference resource is associated with an interference change measurement.
[0312] Aspect 86: The method of Aspect 85, further comprising outputting, to the UE, one or more configurations for the reference resources, wherein the one or more configurations for the reference resources include one or more of a first configuration for the first reference resource and a second configuration for the second reference resource.
[0313] Aspect 87: The method of any of Aspects 57-86, further comprising outputting, to the UE, a configuration for transmitting the CSI report periodically, semi-persistently, or aperiodically.
[0314] Aspect 88: The method of any of Aspects 57-87, further comprising outputting, to the UE, a configuration for one or more event triggers for transmitting the CSI report; and wherein the CSI report is transmitted in accordance with the one or more event triggers.
[0315] Aspect 89: The method of Aspect 88, wherein at least one of the one or more event triggers is associated with a channel change threshold or an interference threshold.
[0316] Aspect 90: The method of Aspect 89, wherein at least one of the channel change threshold or the interference threshold for the one or more event triggers is different from at least one of a channel change threshold or interference threshold associated with the change information.
[0317] Aspect 91: The method of Aspect 90, wherein the channel change threshold for the one or more event triggers is associated with a difference in a power of a channel of at least one antenna pair, and wherein the channel change threshold associated with the change information corresponds to an average power across all transmitter ports and receiver antennas.
[0318] Aspect 92: The method of Aspect 90, wherein the interference threshold for the one or more event triggers is associated with a sum power of a diagonal term of a noise-plus-interference covariance matrix, and wherein the interference threshold for the change information corresponds to a difference in an interference-plus-noise power.
[0319] Aspect 93: The method of Aspect 90, wherein the channel change threshold or the interference threshold for the one or more event triggers is associated with a CQI threshold, and wherein the channel change threshold or the interference threshold for the change information corresponds to a threshold different from the CQI threshold.
[0320] Aspect 94: The method of Aspect 88, further comprising outputting, to the UE, a configuration or pre-configuration for the UE to transmit the CSI report in accordance with the one or more event triggers.
[0321] Aspect 95: The method of Aspect 88, further comprising receiving an event indication, on a first uplink resource, associated with at least one of the one or more event triggers; and wherein the CSI report is received on a second uplink resource.
[0322] Aspect 96: The method of Aspect 88, further comprising receiving an event indication associated with at least one of the one or more event triggers, wherein the event indication is received via a MAC-CE.
[0323] Aspect 97: The method of any of Aspects 57-96, wherein the change information is associated with one or more of a frequency domain difference, a time domain difference, or a spatial domain difference.
[0324] Aspect 98: The method of Aspect 97, wherein the time domain difference is associated with an instantaneous channel estimate or an average channel estimate.
[0325] Aspect 99: The method of Aspect 98, wherein the average channel estimate is associated with an averaging window.
[0326] Aspect 100: The method of Aspect 99, wherein the averaging window for the average channel estimate is different from an averaging window associated with the CSI report.
[0327] Aspect 101: The method of Aspect 97, wherein the frequency domain difference is associated with one or more of a frequency difference for a single subband, an average frequency difference over a subset of subbands, or an average frequency difference over all subbands.
[0328] Aspect 102: The method of Aspect 101, wherein the change information is associated with the single subband, and wherein the CSI report is associated with the single subband.
[0329] Aspect 103: The method of Aspect 101, wherein the change information is associated with the subset of subbands or all subbands, and wherein the CSI report is a wideband report.
[0330] Aspect 104: The method of Aspect 97, wherein the spatial domain difference is associated with one or more of a single codebook, an average of a subset of codebooks, or an average of all codebooks.
[0331] Aspect 105: The method of any of Aspects 57-104, wherein the CSI report is received via a MAC-CE.
[0332] Aspect 106: The method of any of Aspects 57-105, wherein the change information is associated with a difference between a first term and a second term; wherein the first term is associated with one or more of a measured channel characteristic with respect to one or more historical occasions or one or more predicted channel characteristics with respect to one or more future occasions of the first term, wherein the first term is associated with one or more measurement resources of the CSI report; wherein the second term is associated with one or more predicted channel characteristics with respect to one or more future occasions of the second term; and wherein the one or more future occasions of the second term occur after the one or more historical occasions or the one or more future occasions of the first term.
[0333] Aspect 107: The method of Aspect 106, wherein the measured channel characteristic or each of the one or more predicted channel characteristics of the first term are associated with one or more of a rank indicator, a channel quality indicator, or a precoding matrix indicator.
[0334] Aspect 108: The method of Aspect 106, wherein the one or more second term future occasions occur after a reference resource associated with the CSI report.
[0335] Aspect 109: The method of Aspect 106, wherein the one or more historical occasions occur no later than a reference resource associated with the CSI report.
[0336] Aspect 110: The method of Aspect 106, further comprising outputting, to the UE, a configuration for at least one of the one or more historical occasions, the one or more first term future occasions, or the one or more second term future occasions.
[0337] Aspect 111: The method of Aspect 106, wherein at least one of the one or more historical occasions, the one or more first term future occasions, or the one or more second term future occasions is included or indicated in the CSI report.
[0338] Aspect 112: 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 1-111.
[0339] Aspect 113: 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 1-111.
[0340] Aspect 114: An apparatus for wireless communication, the apparatus comprising at least one means for performing the method of one or more of Aspects 1-111.
[0341] Aspect 115: 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 1-111.
[0342] Aspect 116: 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 1-111.
[0343] Aspect 117: 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 1-111.
[0344] Aspect 118: 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 1-111.
[0345] The foregoing disclosure provides illustration and description but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects. No element, act, or instruction described herein should be construed as critical or essential unless explicitly described as such.
[0346] It will be apparent that systems or methods described herein may be implemented in different forms of hardware or a combination of hardware and software. The actual specialized control hardware or software used to implement these systems or methods is not limiting of the aspects. Thus, the operation and behavior of the systems or methods are described herein without reference to specific software code, because those skilled in the art will understand that software and hardware can be designed to implement the systems or methods based, at least in part, on the description herein. A component being configured to perform a function means that the component has a capability to perform the function, and does not require the function to be actually performed by the component, unless noted otherwise.
[0347] As used herein, the articles “a” and “an” are intended to refer to one or more items and may be used interchangeably with “one or more” or “at least one. ” Further, as used herein, the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more. ” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items and may be used interchangeably with “one or more. ” Where only one item is intended, the phrase “only one” or “asingle one” or similar language is used. Also, as used herein, the terms “has, ” “have, ” “having, ” “comprise, ” “comprising, ” “include” and “including, ” and derivatives thereof or similar terms are intended to be open-ended terms that do not limit an element that they modify (for example, an element “having” A may also have B) . Also, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and / or, ” unless explicitly stated otherwise (for example, if used in combination with “either” or “only one of” ) . As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a + b, a + c, b + c, and a + b + c, as well as any combination with multiples of the same element (for example, a + a, a + a + a, a + a + b, a + a + c, a + b + b, a + c + c, b + b, b + b + b, b + b + c, c + c, and c + c + c, or any other ordering of a, b, and c) .
[0348] As used herein, the term “determine” or “determining” encompasses a wide variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, estimating, investigating, looking up (such as via looking up in a table, a database, or another data structure) , searching, inferring, ascertaining, and / or measuring, among other possibilities. Also, “determining” can include receiving (such as receiving information) , accessing (such as accessing data stored in memory) or transmitting (such as transmitting information) , among other possibilities. Additionally, “determining” can include resolving, selecting, obtaining, choosing, establishing, and / or other such similar actions.
[0349] As used herein, the phrase “based on” is intended to mean “based at least in part on” or “based on or otherwise in association with” unless explicitly stated otherwise. As used herein, “satisfying a threshold” may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, or not equal to the threshold, among other examples.
[0350] Even though particular combinations of features are recited in the claims or disclosed in the specification, these combinations are not intended to limit the scope of all aspects described herein. Many of these features may be combined in ways not specifically recited in the claims or disclosed in the specification. The disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set.
Claims
A user equipment (UE) for wireless communication, comprising:one or more memories; andone or more processors, coupled to the one or more memories, configured to cause the UE to:receive one or more channel measurement resources or one or more interference measurement resources; andtransmit a channel state information (CSI) report that includes change information associated with a difference between a CSI value and a reference value.The UE of claim 1, wherein the change information includes one or more bits indicating a reason for the difference between the CSI value and the reference value.The UE of claim 2, wherein the reason for the difference between the CSI value and the reference value includes one or more of a channel change or an interference change.The UE of claim 1, wherein the change information includes one or more bits indicating one or more of a channel delta or a noise-plus-interference covariance matrix (Rnn) delta.The UE of claim 1, wherein the change information indicates whether the difference between the CSI value and the reference value exceeds a threshold.The UE of claim 5, wherein the threshold is a channel change threshold or an interference threshold.The UE of claim 5, wherein the change information includes two or more bits indicating that the difference between the CSI value and the reference value exceeds the threshold, does not exceed the threshold, or is the same as the threshold.The UE of claim 1, wherein the change information indicates one or more of range of a channel change or a range of an interference change, andwherein one or more of the range of the channel change or the range of the interference change are defined in accordance with a lower threshold value and an upper threshold value.The UE of claim 1, wherein the one or more processors are further configured to cause the UE to receive a configuration identifying one or more metrics associated with the change information.The UE of claim 1, wherein the one or more processors are further configured to cause the UE to transmit signaling that indicates a metric to be used for defining the change information.The UE of claim 1, wherein the one or more processors are further configured to cause the UE to:detect the difference between a CSI value and the reference value; andtransmit the CSI report as a result of detecting the difference between the CSI value and the reference value.The UE of claim 1, wherein the one or more processors are further configured to cause the UE to:receive a CSI report configuration having a report quantity parameter associated with the change information; andwherein the one or more processors, to cause the UE to transmit the CSI report, are configured to cause the UE to transmit the CSI report in accordance with the report quantity parameter.The UE of claim 1, wherein the reference value is associated with a most recent CSI report before the CSI report that includes the change information.The UE of claim 1, wherein the one or more processors are further configured to cause the UE to receive a configuration for transmitting the CSI report periodically, semi-persistently, or aperiodically.The UE of claim 1, wherein the one or more processors are further configured to cause the UE to receive a configuration for one or more event triggers for transmitting the CSI report; andwherein the CSI report is transmitted in accordance with the one or more event triggers.The UE of claim 1, wherein the change information is associated with one or more of a frequency domain difference, a time domain difference, or a spatial domain difference.The UE of claim 1, wherein the CSI report is transmitted via a medium access control (MAC) control element.The UE of claim 1, wherein the change information is associated with a difference between a first term and a second term;wherein the first term is associated with one or more of a measured channel characteristic in accordance with one or more historical occasions or one or more predicted channel characteristics in accordance with one or more first term future occasions,wherein the first term is associated with one or more measurement resources of the CSI report;wherein the second term is associated with one or more predicted channel characteristics in accordance with one or more second term future occasions; andwherein the one or more second future occasions occur after the one or more historical occasions or the one or more first term future occasions.A method of wireless communication performed by a user equipment (UE) , comprising:receiving one or more channel measurement resources or one or more interference measurement resources; andtransmitting a channel state information (CSI) report that includes change information associated with a difference between a CSI value and a reference value.An apparatus for wireless communication, comprising:means for receiving one or more channel measurement resources or one or more interference measurement resources; andmeans for transmitting a channel state information (CSI) report that includes change information associated with a difference between a CSI value and a reference value.