Report mode selection and CSI reference resource definition for event-driven CSI report
By configuring different modes for UE-initiated CSI reporting and defining CSI resources, the method addresses inefficiencies in 5G NR systems, enhancing resource utilization and report relevance in wireless communication.
Patent Information
- Application Number
- PCT/CN2024/108717
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2026-02-05
AI Technical Summary
Existing wireless communication systems, particularly in 5G NR, face challenges in efficiently managing and configuring channel state information (CSI) reports initiated by user equipment (UE), as the uplink slot for these reports is not predetermined, leading to inefficiencies in resource utilization and report relevance.
The method involves configuring and managing different modes (Mode A and Mode B) for UE-initiated CSI reporting, defining CSI resources based on CSI report modes, and utilizing a CSI reference resource to determine the uplink slot for CSI reports, with the UE adjusting transmissions based on timing thresholds and network configurations.
This approach enhances the efficiency and relevance of CSI reports by optimizing resource utilization and adapting to varying conditions, thereby improving the overall performance of wireless communication systems.
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Figure CN2024108717_05022026_PF_FP_ABST
Abstract
Description
REPORT MODE SELECTION AND CSI REFERENCE RESOURCE DEFINITION FOR EVENT-DRIVEN CSI REPORTTECHNICAL FIELD
[0001] The present disclosure relates generally to communication systems and, more particularly, to report mode selection and channel state information (CSI) reference resource definition for event-driven CSI reports.
[0002] INTRODUCTION
[0003] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.
[0004] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. An example telecommunication standard is 5G New Radio (NR) . 5G NR is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT) ) , and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB) , massive machine type communications (mMTC) , and ultra-reliable low latency communications (URLLC) . Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There exists a need for further improvements in 5G NR technology. These improvements may also be applicable to other multi-access technologies and the telecommunication standards that employ these technologies.
[0005] BRIEF SUMMARY
[0006] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects. This summary neither identifies key or critical elements of all aspects nor delineates the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
[0007] In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided for wireless communication at a user equipment (UE) . The apparatus may include at least one memory and at least one processor coupled to the at least one memory. Based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, may be configured to identify a channel state information (CSI) reference resource for a UE-initiated CSI report; and manage, based on a CSI report mode and the CSI reference resource, the UE-initiated CSI report, where the CSI report mode includes one of a first mode or a second mode, and where the first mode indicates a first physical uplink control channel (PUCCH) transmission, and the second mode indicates the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report.
[0008] In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided for wireless communication at a network entity. The apparatus may include at least one memory and at least one processor coupled to the at least one memory. Based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, may be configured to indicate, to a UE, a CSI report mode for a UE-initiated CSI report to be one of a first mode or a second mode, where the first mode indicates a first PUCCH transmission, and the second mode indicates the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report; and receive, from the UE, the UE-initiated CSI report on a CSI reference resource, where the CSI reference resource is based on a first uplink slot carrying the first PUCCH transmission.
[0009] To the accomplishment of the foregoing and related ends, the one or more aspects may include the features hereinafter fully described and particularly pointed out in the claims. The following description and the drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed.BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIG. 1 is a diagram illustrating an example of a wireless communication system and an access network.
[0011] FIG. 2A is a diagram illustrating an example of a first frame, in accordance with various aspects of the present disclosure.
[0012] FIG. 2B is a diagram illustrating an example of downlink (DL) channels within a subframe, in accordance with various aspects of the present disclosure.
[0013] FIG. 2C is a diagram illustrating an example of a second frame, in accordance with various aspects of the present disclosure.
[0014] FIG. 2D is a diagram illustrating an example of uplink (UL) channels within a subframe, in accordance with various aspects of the present disclosure.
[0015] FIG. 3 is a diagram illustrating an example of a base station and user equipment (UE) in an access network.
[0016] FIG. 4 is a diagram illustrating the determination of the time domain CSI reference resource for a UE-initiated channel state information (CSI) report in accordance with various aspects of the present disclosure.
[0017] FIG. 5 is a diagram illustrating an example of using a two-stage method to determine the time domain CSI reference resource for a UE-initiated CSI report in accordance with various aspects of the present disclosure.
[0018] FIG. 6 is a diagram illustrating the example managements of UE-initiated CSI reports in accordance with various aspects of the present disclosure.
[0019] FIG. 7 is a diagram illustrating an example of separated CSI resources for UE-initiated CSI reports in accordance with various aspects of the present disclosure.
[0020] FIG. 8 is a call flow diagram illustrating a method of wireless communication in accordance with various aspects of the present disclosure.
[0021] FIG. 9 is a flowchart illustrating methods of wireless communication at a UE in accordance with various aspects of the present disclosure.
[0022] FIG. 10 is a flowchart illustrating methods of wireless communication at a UE in accordance with various aspects of the present disclosure.
[0023] FIG. 11 is a flowchart illustrating methods of wireless communication at a network entity in accordance with various aspects of the present disclosure.
[0024] FIG. 12 is a flowchart illustrating methods of wireless communication at a network entity in accordance with various aspects of the present disclosure.
[0025] FIG. 13 is a diagram illustrating an example of a hardware implementation for an example apparatus and / or UE.
[0026] FIG. 14 is a diagram illustrating an example of a hardware implementation for an example network entity.DETAILED DESCRIPTION
[0027] In the channel state information (CSI) report framework for periodic, semi-persistent, and aperiodic CSI, a pre-determined uplink (UL) slot is used to transmit the report message through the physical uplink control channel (PUCCH) or the physical uplink shared channel (PUSCH) . Based on this pre-determined uplink slot, the CSI reference resource in the time domain is defined, and the occupation of the CSI processing unit (CPU) may be determined based on the CSI reference resource. However, when a CSI report is initiated by the UE or triggered by an event, referred to as a UE-initiated or event-driven CSI report, the uplink slot for transmitting the CSI report is not pre-determined. There may be different modes of a UE-initiated or event-driven CSI report. In some modes, which may be referred to as Mode A and Mode B, a first PUCCH may be transmitted before the uplink slot for transmission of the CSI report can be determined. Example aspects presented herein provide methods and apparatus for configuring and managing different modes of UE-initiated CSI reporting (e.g., Mode A and Mode B) and defining CSI resources for UE-initiated or event-driven CSI reports, applicable to both regular CSI reports and those triggered by layer 1 (L1) or layer 2 (L2) mobility (e.g., LTM CSI report) .
[0028] Various aspects relate generally to wireless communication. Some aspects more specifically relate to the configuration and management of different modes (e.g., Mode A and Mode B) and the definition of CSI resources for UE-initiated or event-driven CSI reports. In some examples, a UE identifies a CSI reference resource for a UE-initiated CSI report; and manages the UE-initiated CSI report based on a CSI report mode and the CSI reference resource. The CSI report mode may include one of a first mode or a second mode. The first mode may indicate a first PUCCH transmission, and the second mode may indicate both the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report. In some examples, the management of the UE-initiated CSI report is based on the first mode when the UE has received, from a network entity, a first configuration for the first PUCCH transmission and not a second configuration for the CSI uplink slot for the UE-initiated CSI report. In some examples, the management of the UE-initiated CSI report is based on the second mode when the UE has received, from the network entity, the first configuration for the first PUCCH transmission and the second configuration for the CSI uplink slot for the UE-initiated CSI report. In some examples, the CSI reference resource for the UE-initiated CSI report may be defined based on whether a time interval between a first uplink slot for the first PUCCH transmission and a tentative CSI reference resource is less than an interval threshold. In some examples, if the time interval is greater than or equal to the interval threshold, the UE may perform measurements for the UE-initiated CSI report; and transmit the first PUCCH transmission and the UE-initiated CSI report. In some examples, if the time interval is less than the interval threshold, the UE may perform measurements for the UE-initiated CSI report, but skip the first PUCCH transmission. In some examples, if the time interval is less than the interval threshold, the UE may skip the measurements for the UE-initiated CSI report.
[0029] 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, by enabling the UE to configure and manage different modes (e.g., Mode A or Mode B) and to define CSI reference resources for UE-initiated CSI reports based on the timing of relevant events for the CSI reports, the described techniques enhance efficiency and resource utilization in wireless communication. In some examples, by enabling the UE to modify the CSI reporting, such as deferring CSI reports or adjusting measurement schedules based on varying conditions, the described techniques improve the relevance and effectiveness of the CSI reports, thereby enhancing the overall performance of wireless communication.
[0030] The detailed description set forth below in connection with the drawings describes various configurations and does not represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, these concepts may be practiced without these specific details. In some instances, well known structures and components are shown in block diagram form in order to avoid obscuring such concepts.
[0031] Several aspects of telecommunication systems are presented with reference to various apparatus and methods. These apparatus and methods are described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as “elements” ) . These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
[0032] By way of example, an element, or any portion of an element, or any combination of elements may be implemented as a “processing system” that includes one or more processors. When multiple processors are implemented, the multiple processors may perform the functions individually or in combination. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs) , central processing units (CPUs) , application processors, digital signal processors (DSPs) , reduced instruction set computing (RISC) processors, systems on a chip (SoC) , baseband processors, field programmable gate arrays (FPGAs) , programmable logic devices (PLDs) , state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure. One or more processors in the processing system may execute software. Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise, shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, or any combination thereof.
[0033] Accordingly, in one or more example aspects, implementations, and / or use cases, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media. Storage media may be any available media that can be accessed by a computer. By way of example, such computer-readable media can include a random-access memory (RAM) , a read-only memory (ROM) , an electrically erasable programmable ROM (EEPROM) , optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.
[0034] While aspects, implementations, and / or use cases are described in this application by illustration to some examples, additional or different aspects, implementations and / or use cases may come about in many different arrangements and scenarios. Aspects, implementations, and / or use cases described herein may be implemented across many differing platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, aspects, implementations, and / or use cases may come about via integrated chip implementations and other non-module-component based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, artificial intelligence (AI) -enabled devices, etc. ) . While some examples may or may not be specifically directed to use cases or applications, a wide assortment of applicability of described examples may occur. Aspects, implementations, and / or use cases may range a spectrum from chip-level or modular components to non-modular, non-chip-level implementations and further to aggregate, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more techniques herein. In some practical settings, devices incorporating described aspects and features may also include additional components and features for implementation and practice of claimed and described aspect. For example, transmission and reception of wireless signals necessarily includes a number of components for analog and digital purposes (e.g., hardware components including antenna, RF-chains, power amplifiers, modulators, buffer, processor (s) , interleaver, adders / summers, etc. ) . Techniques described herein may be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, aggregated or disaggregated components, end-user devices, etc. of varying sizes, shapes, and constitution.
[0035] Deployment of communication systems, such as 5G NR systems, may be arranged in multiple manners with various components or constituent parts. In a 5G NR system, or network, a network node, a network entity, a mobility element of a network, a radio access network (RAN) node, a core network node, a network element, or a network equipment, such as a base station (BS) , or one or more units (or one or more components) performing base station functionality, may be implemented in an aggregated or disaggregated architecture. For example, a BS (such as a Node B (NB) , evolved NB (eNB) , NR BS, 5G NB, access point (AP) , a transmission reception point (TRP) , or a cell, etc. ) may be implemented as an aggregated base station (also known as a standalone BS or a monolithic BS) or a disaggregated base station.
[0036] An aggregated base station may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node. A disaggregated base station may be configured to utilize a protocol stack that is physically or logically distributed among two or more units (such as one or more central or centralized units (CUs) , one or more distributed units (DUs) , or one or more radio units (RUs) ) . In some aspects, a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed throughout one or multiple other RAN nodes. The DUs may be implemented to communicate with one or more RUs. Each of the CU, DU and RU can be implemented as virtual units, i.e., a virtual central unit (VCU) , a virtual distributed unit (VDU) , or a virtual radio unit (VRU) .
[0037] Base station operation or network design may consider aggregation characteristics of base station functionality. For example, disaggregated base stations may be utilized in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (such as the network configuration sponsored by the O-RAN Alliance) ) , or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN) ) . Disaggregation may include distributing functionality across two or more units at various physical locations, as well as distributing functionality for at least one unit virtually, which can enable flexibility in network design. The various units of the disaggregated base station, or disaggregated RAN architecture, can be configured for wired or wireless communication with at least one other unit.
[0038] FIG. 1 is a diagram 100 illustrating an example of a wireless communications system and an access network. The illustrated wireless communications system includes a disaggregated base station architecture. The disaggregated base station architecture may include one or more CUs 110 that can communicate directly with a core network 120 via a backhaul link, or indirectly with the core network 120 through one or more disaggregated base station units (such as a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) 125 via an E2 link, or a Non-Real Time (Non-RT) RIC 115 associated with a Service Management and Orchestration (SMO) Framework 105, or both) . A CU 110 may communicate with one or more DUs 130 via respective midhaul links, such as an F1 interface. The DUs 130 may communicate with one or more RUs 140 via respective fronthaul links. The RUs 140 may communicate with respective UEs 104 via one or more radio frequency (RF) access links. In some implementations, the UE 104 may be simultaneously served by multiple RUs 140.
[0039] Each of the units, i.e., the CUs 110, the DUs 130, the RUs 140, as well as the Near-RT RICs 125, the Non-RT RICs 115, and the SMO Framework 105, may include one or more interfaces or be coupled to one or more interfaces configured to receive or to transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the units, or an associated processor or controller providing instructions to the communication interfaces of the units, can be configured to communicate with one or more of the other units via the transmission medium. For example, the units can include a wired interface configured to receive or to transmit signals over a wired transmission medium to one or more of the other units. Additionally, the units can include a wireless interface, which may include a receiver, a transmitter, or a transceiver (such as an RF transceiver) , configured to receive or to transmit signals, or both, over a wireless transmission medium to one or more of the other units.
[0040] In some aspects, the CU 110 may host one or more higher layer control functions. Such control functions can include radio resource control (RRC) , packet data convergence protocol (PDCP) , service data adaptation protocol (SDAP) , or the like. Each control function can be implemented with an interface configured to communicate signals with other control functions hosted by the CU 110. The CU 110 may be configured to handle user plane functionality (i.e., Central Unit –User Plane (CU-UP) ) , control plane functionality (i.e., Central Unit –Control Plane (CU-CP) ) , or a combination thereof. In some implementations, the CU 110 can be logically split into one or more CU-UP units and one or more CU-CP units. The CU-UP unit can communicate bidirectionally with the CU-CP unit via an interface, such as an E1 interface when implemented in an O-RAN configuration. The CU 110 can be implemented to communicate with the DU 130, as necessary, for network control and signaling.
[0041] The DU 130 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 140. In some aspects, the DU 130 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation, demodulation, or the like) depending, at least in part, on a functional split, such as those defined by 3GPP. In some aspects, the DU 130 may further host one or more low PHY layers. Each layer (or module) can be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DU 130, or with the control functions hosted by the CU 110.
[0042] Lower-layer functionality can be implemented by one or more RUs 140. In some deployments, an RU 140, controlled by a DU 130, may correspond to a logical node that hosts RF processing functions, or low-PHY layer functions (such as performing fast Fourier transform (FFT) , inverse FFT (iFFT) , digital beamforming, physical random access channel (PRACH) extraction and filtering, or the like) , or both, based at least in part on the functional split, such as a lower layer functional split. In such an architecture, the RU (s) 140 can be implemented to handle over the air (OTA) communication with one or more UEs 104. In some implementations, real-time and non-real-time aspects of control and user plane communication with the RU (s) 140 can be controlled by the corresponding DU 130. In some scenarios, this configuration can enable the DU (s) 130 and the CU 110 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
[0043] The SMO Framework 105 may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO Framework 105 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements that may be managed via an operations and maintenance interface (such as an O1 interface) . For virtualized network elements, the SMO Framework 105 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 190) 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) . Such virtualized network elements can include, but are not limited to, CUs 110, DUs 130, RUs 140 and Near-RT RICs 125. In some implementations, the SMO Framework 105 can communicate with a hardware aspect of a 4G RAN, such as an open eNB (O-eNB) 111, via an O1 interface. Additionally, in some implementations, the SMO Framework 105 can communicate directly with one or more RUs 140 via an O1 interface. The SMO Framework 105 also may include a Non-RT RIC 115 configured to support functionality of the SMO Framework 105.
[0044] The Non-RT RIC 115 may be configured to include a logical function that enables non-real-time control and optimization of RAN elements and resources, artificial intelligence (AI) / machine learning (ML) (AI / ML) workflows including model training and updates, or policy-based guidance of applications / features in the Near-RT RIC 125. The Non-RT RIC 115 may be coupled to or communicate with (such as via an A1 interface) the Near-RT RIC 125. The Near-RT RIC 125 may be configured to include a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (such as via an E2 interface) connecting one or more CUs 110, one or more DUs 130, or both, as well as an O-eNB, with the Near-RT RIC 125.
[0045] In some implementations, to generate AI / ML models to be deployed in the Near-RT RIC 125, the Non-RT RIC 115 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 125 and may be received at the SMO Framework 105 or the Non-RT RIC 115 from non-network data sources or from network functions. In some examples, the Non-RT RIC 115 or the Near-RT RIC 125 may be configured to tune RAN behavior or performance. For example, the Non-RT RIC 115 may monitor long-term trends and patterns for performance and employ AI / ML models to perform corrective actions through the SMO Framework 105 (such as reconfiguration via O1) or via creation of RAN management policies (such as A1 policies) .
[0046] At least one of the CU 110, the DU 130, and the RU 140 may be referred to as a base station 102. Accordingly, a base station 102 may include one or more of the CU 110, the DU 130, and the RU 140 (each component indicated with dotted lines to signify that each component may or may not be included in the base station 102) . The base station 102 provides an access point to the core network 120 for a UE 104. The base station 102 may include macrocells (high power cellular base station) and / or small cells (low power cellular base station) . The small cells include femtocells, picocells, and microcells. A network that includes both small cell and macrocells may be known as a heterogeneous network. A heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs) , which may provide service to a restricted group known as a closed subscriber group (CSG) . The communication links between the RUs 140 and the UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to an RU 140 and / or downlink (DL) (also referred to as forward link) transmissions from an RU 140 to a UE 104. The communication links may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication links may be through one or more carriers. The base station 102 / UEs 104 may use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) bandwidth per carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) used for transmission in each direction. The carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL) . The component carriers may include a primary component carrier and one or more secondary component carriers. A primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell) .
[0047] Certain UEs 104 may communicate with each other using device-to-device (D2D) communication link 158. The D2D communication link 158 may use the DL / UL wireless wide area network (WWAN) spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) . D2D communication may be through a variety of wireless D2D communications systems, such as for example, BluetoothTM (Bluetooth is a trademark of the Bluetooth Special Interest Group (SIG) ) , Wi-FiTM (Wi-Fi is a trademark of the Wi-Fi Alliance) based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.
[0048] The wireless communications system may further include a Wi-Fi AP 150 in communication with UEs 104 (also referred to as Wi-Fi stations (STAs) ) via communication link 154, e.g., in a 5 GHz unlicensed frequency spectrum or the like. When communicating in an unlicensed frequency spectrum, the UEs 104 / AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.
[0049] The electromagnetic spectrum is often subdivided, based on frequency / wavelength, into various classes, bands, channels, etc. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz –7.125 GHz) and FR2 (24.25 GHz –52.6 GHz) . Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “sub-6 GHz” band in various documents and articles. A similar nomenclature issue sometimes occurs with regard to FR2, which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.
[0050] The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified an operating band for these mid-band frequencies as frequency range designation FR3 (7.125 GHz –24.25 GHz) . Frequency bands falling within FR3 may inherit FR1 characteristics and / or FR2 characteristics, and thus may effectively extend features of FR1 and / or FR2 into mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR2-2 (52.6 GHz –71 GHz) , FR4 (71 GHz –114.25 GHz) , and FR5 (114.25 GHz –300 GHz) . Each of these higher frequency bands falls within the EHF band.
[0051] With the above aspects in mind, unless specifically stated otherwise, the term “sub-6 GHz” or the like if used herein may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. Further, unless specifically stated otherwise, the term “millimeter wave” or the like if used herein may broadly represent frequencies that may include mid-band frequencies, may be within FR2, FR4, FR2-2, and / or FR5, or may be within the EHF band.
[0052] The base station 102 and the UE 104 may each include a plurality of antennas, such as antenna elements, antenna panels, and / or antenna arrays to facilitate beamforming. The base station 102 may transmit a beamformed signal 182 to the UE 104 in one or more transmit directions. The UE 104 may receive the beamformed signal from the base station 102 in one or more receive directions. The UE 104 may also transmit a beamformed signal 184 to the base station 102 in one or more transmit directions. The base station 102 may receive the beamformed signal from the UE 104 in one or more receive directions. The base station 102 / UE 104 may perform beam training to determine the best receive and transmit directions for each of the base station 102 / UE 104. The transmit and receive directions for the base station 102 may or may not be the same. The transmit and receive directions for the UE 104 may or may not be the same.
[0053] The base station 102 may include and / or be referred to as a gNB, Node B, eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS) , an extended service set (ESS) , a TRP, network node, network entity, network equipment, or some other suitable terminology. The base station 102 can be implemented as an integrated access and backhaul (IAB) node, a relay node, a sidelink node, an aggregated (monolithic) base station with a baseband unit (BBU) (including a CU and a DU) and an RU, or as a disaggregated base station including one or more of a CU, a DU, and / or an RU. The set of base stations, which may include disaggregated base stations and / or aggregated base stations, may be referred to as next generation (NG) RAN (NG-RAN) .
[0054] The core network 120 may include an Access and Mobility Management Function (AMF) 161, a Session Management Function (SMF) 162, a User Plane Function (UPF) 163, a Unified Data Management (UDM) 164, one or more location servers 168, and other functional entities. The AMF 161 is the control node that processes the signaling between the UEs 104 and the core network 120. The AMF 161 supports registration management, connection management, mobility management, and other functions. The SMF 162 supports session management and other functions. The UPF 163 supports packet routing, packet forwarding, and other functions. The UDM 164 supports the generation of authentication and key agreement (AKA) credentials, user identification handling, access authorization, and subscription management. The one or more location servers 168 are illustrated as including a Gateway Mobile Location Center (GMLC) 165 and a Location Management Function (LMF) 166. However, generally, the one or more location servers 168 may include one or more location / positioning servers, which may include one or more of the GMLC 165, the LMF 166, a position determination entity (PDE) , a serving mobile location center (SMLC) , a mobile positioning center (MPC) , or the like. The GMLC 165 and the LMF 166 support UE location services. The GMLC 165 provides an interface for clients / applications (e.g., emergency services) for accessing UE positioning information. The LMF 166 receives measurements and assistance information from the NG-RAN and the UE 104 via the AMF 161 to compute the position of the UE 104. The NG-RAN may utilize one or more positioning methods in order to determine the position of the UE 104. Positioning the UE 104 may involve signal measurements, a position estimate, and an optional velocity computation based on the measurements. The signal measurements may be made by the UE 104 and / or the base station 102 serving the UE 104. The signals measured may be based on one or more of a satellite positioning system (SPS) 170 (e.g., one or more of a Global Navigation Satellite System (GNSS) , global position system (GPS) , non-terrestrial network (NTN) , or other satellite position / location system) , LTE signals, wireless local area network (WLAN) signals, Bluetooth signals, a terrestrial beacon system (TBS) , sensor-based information (e.g., barometric pressure sensor, motion sensor) , NR enhanced cell ID (NR E-CID) methods, NR signals (e.g., multi-round trip time (Multi-RTT) , DL angle-of-departure (DL-AoD) , DL time difference of arrival (DL-TDOA) , UL time difference of arrival (UL-TDOA) , and UL angle-of-arrival (UL-AoA) positioning) , and / or other systems / signals / sensors.
[0055] Examples of UEs 104 include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA) , a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player) , a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor / actuator, a display, or any other similar functioning device. Some of the UEs 104 may be referred to as IoT devices (e.g., parking meter, gas pump, toaster, vehicles, heart monitor, etc. ) . The UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. In some scenarios, the term UE may also apply to one or more companion devices such as in a device constellation arrangement. One or more of these devices may collectively access the network and / or individually access the network.
[0056] Referring again to FIG. 1, in certain aspects, the UE 104 may include the CSI configuration component 198. The CSI configuration component 198 may be configured to identify a CSI reference resource for a UE-initiated CSI report; and manage, based on a CSI report mode and the CSI reference resource, the UE-initiated CSI report, where the CSI report mode includes one of a first mode or a second mode, and where the first mode indicates a first physical uplink control channel (PUCCH) transmission, and the second mode indicates the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report. In certain aspects, the base station 102 may include the CSI configuration component 199. The CSI configuration component 199 may be configured to indicate, to a UE, a CSI report mode for a UE-initiated CSI report to be one of a first mode or a second mode, where the first mode indicates a first PUCCH transmission, and the second mode indicates the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report; and receive, from the UE, the UE-initiated CSI report on a CSI reference resource, where the CSI reference resource is based on a first uplink slot carrying the first PUCCH transmission. Although the following description may be focused on 5G NR, the concepts described herein may be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.
[0057] FIG. 2A is a diagram 200 illustrating an example of a first subframe within a 5G NR frame structure. FIG. 2B is a diagram 230 illustrating an example of DL channels within a 5G NR subframe. FIG. 2C is a diagram 250 illustrating an example of a second subframe within a 5G NR frame structure. FIG. 2D is a diagram 280 illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be frequency division duplexed (FDD) in which for a particular set of subcarriers (carrier system bandwidth) , subframes within the set of subcarriers are dedicated for either DL or UL, or may be time division duplexed (TDD) in which for a particular set of subcarriers (carrier system bandwidth) , subframes within the set of subcarriers are dedicated for both DL and UL. In the examples provided by FIGs. 2A, 2C, the 5G NR frame structure is assumed to be TDD, with subframe 4 being configured with slot format 28 (with mostly DL) , where D is DL, U is UL, and F is flexible for use between DL / UL, and subframe 3 being configured with slot format 1 (with all UL) . While subframes 3, 4 are shown with slot formats 1, 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0, 1 are all DL, UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. UEs are configured with the slot format (dynamically through DL control information (DCI) , or semi-statically / statically through radio resource control (RRC) signaling) through a received slot format indicator (SFI) . Note that the description infra applies also to a 5G NR frame structure that is TDD.
[0058] FIGs. 2A-2D illustrate a frame structure, and the aspects of the present disclosure may be applicable to other wireless communication technologies, which may have a different frame structure and / or different channels. A frame (10 ms) may be divided into 10 equally sized subframes (1 ms) . Each subframe may include one or more time slots. Subframes may also include mini-slots, which may include 7, 4, or 2 symbols. Each slot may include 14 or 12 symbols, depending on whether the cyclic prefix (CP) is normal or extended. For normal CP, each slot may include 14 symbols, and for extended CP, each slot may include 12 symbols. The symbols on DL may be CP orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbols. The symbols on UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (for power limited scenarios; limited to a single stream transmission) . The number of slots within a subframe is based on the CP and the numerology. The numerology defines the subcarrier spacing (SCS) (see Table 1) . The symbol length / duration may scale with 1 / SCS.
[0059] Table 1: Numerology, SCS, and CP
[0060] For normal CP (14 symbols / slot) , different numerologies μ 0 to 4 allow for 1, 2, 4, 8, and 16 slots, respectively, per subframe. For extended CP, the numerology 2 allows for 4 slots per subframe. Accordingly, for normal CP and numerology μ, there are 14 symbols / slot and 2μ slots / subframe. The subcarrier spacing may be equal to 2μ*15 kHz, where μ is the numerology 0 to 4. As such, the numerology μ=0 has a subcarrier spacing of 15 kHz and the numerology μ=4 has a subcarrier spacing of 240 kHz. The symbol length / duration is inversely related to the subcarrier spacing. FIGs. 2A-2D provide an example of normal CP with 14 symbols per slot and numerology μ=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs. Within a set of frames, there may be one or more different bandwidth parts (BWPs) (see FIG. 2B) that are frequency division multiplexed. Each BWP may have a particular numerology and CP (normal or extended) .
[0061] A resource grid may be used to represent the frame structure. Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs) ) that extends 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs) . The number of bits carried by each RE depends on the modulation scheme.
[0062] As illustrated in FIG. 2A, some of the REs carry reference (pilot) signals (RS) for the UE. The RS may include demodulation RS (DM-RS) (indicated as R for one particular configuration, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RS) for channel estimation at the UE. The RS may also include beam measurement RS (BRS) , beam refinement RS (BRRS) , and phase tracking RS (PT-RS) .
[0063] FIG. 2B illustrates an example of various DL channels within a subframe of a frame. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs) , each CCE including six RE groups (REGs) , each REG including 12 consecutive REs in an OFDM symbol of an RB. A PDCCH within one BWP may be referred to as a control resource set (CORESET) . A UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., common search space, UE-specific search space) during PDCCH monitoring occasions on the CORESET, where the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at greater and / or lower frequencies across the channel bandwidth. A primary synchronization signal (PSS) may be within symbol 2 of particular subframes of a frame. The PSS is used by a UE 104 to determine subframe / symbol timing and a physical layer identity. A secondary synchronization signal (SSS) may be within symbol 4 of particular subframes of a frame. The SSS is used by a UE to determine a physical layer cell identity group number and radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine a physical cell identifier (PCI) . Based on the PCI, the UE can determine the locations of the DM-RS. The physical broadcast channel (PBCH) , which carries a master information block (MIB) , may be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also referred to as SS block (SSB) ) . The MIB provides a number of RBs in the system bandwidth and a system frame number (SFN) . The physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs) , and paging messages.
[0064] As illustrated in FIG. 2C, some of the REs carry DM-RS (indicated as R for one particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE may transmit DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH) . The PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used. The UE may transmit sounding reference signals (SRS) . The SRS may be transmitted in the last symbol of a subframe. The SRS may have a comb structure, and a UE may transmit SRS on one of the combs. The SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL.
[0065] FIG. 2D illustrates an example of various UL channels within a subframe of a frame. The PUCCH may be located as indicated in one configuration. The PUCCH carries uplink control information (UCI) , such as scheduling requests, a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a rank indicator (RI) , and hybrid automatic repeat request (HARQ) acknowledgment (ACK) (HARQ-ACK) feedback (i.e., one or more HARQ ACK bits indicating one or more ACK and / or negative ACK (NACK) ) . The PUSCH carries data, and may additionally be used to carry a buffer status report (BSR) , a power headroom report (PHR) , and / or UCI.
[0066] FIG. 3 is a block diagram of a base station 310 in communication with a UE 350 in an access network. In the DL, Internet protocol (IP) packets may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIBs) , RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release) , inter radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression / decompression, security (ciphering, deciphering, integrity protection, integrity verification) , and handover support functions; RLC layer functionality associated with the transfer of upper layer packet data units (PDUs) , error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs) , re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs) , demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.
[0067] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1, which includes a physical (PHY) layer, may include error detection on the transport channels, forward error correction (FEC) coding / decoding of the transport channels, interleaving, rate matching, mapping onto physical channels, modulation / demodulation of physical channels, and MIMO antenna processing. The TX processor 316 handles mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK) , quadrature phase-shift keying (QPSK) , M-phase-shift keying (M-PSK) , M-quadrature amplitude modulation (M-QAM) ) . The coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and / or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine the coding and modulation scheme, as well as for spatial processing. The channel estimate may be derived from a reference signal and / or channel condition feedback transmitted by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318Tx. Each transmitter 318Tx may modulate a radio frequency (RF) carrier with a respective spatial stream for transmission.
[0068] At the UE 350, each receiver 354Rx receives a signal through its respective antenna 352. Each receiver 354Rx recovers information modulated onto an RF carrier and provides the information to the receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 may perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, they may be combined by the RX processor 356 into a single OFDM symbol stream. The RX processor 356 then converts the OFDM symbol stream from the time-domain to the frequency domain using a Fast Fourier Transform (FFT) . The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, and the reference signal, are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station 310. These soft decisions may be based on channel estimates computed by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the base station 310 on the physical channel. The data and control signals are then provided to the controller / processor 359, which implements layer 3 and layer 2 functionality.
[0069] The controller / processor 359 can be associated with at least one memory 360 that stores program codes and data. The at least one memory 360 may be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets. The controller / processor 359 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.
[0070] Similar to the functionality described in connection with the DL transmission by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression / decompression, and security (ciphering, deciphering, integrity protection, integrity verification) ; RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.
[0071] Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by the TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antenna 352 via separate transmitters 354Tx. Each transmitter 354Tx may modulate an RF carrier with a respective spatial stream for transmission.
[0072] The UL transmission is processed at the base station 310 in a manner similar to that described in connection with the receiver function at the UE 350. Each receiver 318Rx receives a signal through its respective antenna 320. Each receiver 318Rx recovers information modulated onto an RF carrier and provides the information to a RX processor 370.
[0073] The controller / processor 375 can be associated with at least one memory 376 that stores program codes and data. The at least one memory 376 may be referred to as a computer-readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets. The controller / processor 375 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.
[0074] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform aspects in connection with the CSI configuration component 198 of FIG. 1.
[0075] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform aspects in connection with the CSI configuration component 199 of FIG. 1.
[0076] The present disclosure provides methods and apparatus for configuring and managing different modes of UE-initiated or event-driven CSI reports (e.g., Mode A and Mode B) and defining CSI resources for UE-initiated or event-driven CSI reports. For example, different modes for UE-initiated or event-driven beam reporting can be indicated either implicitly or explicitly in RRC. For UE-initiated or event-driven CSI reports, the definition of CSI reference resource is provided for both Mode A and Mode B, and for cases specific to Mode B only.
[0077] In wireless communication, a receiver can transmit a CSI report that provides information about the properties of the communication channel between the transmitter and the receiver, which may be used to improve communication, e.g., through improved scheduling or adjustment of characteristics of wireless transmission, such as a modulation, code rate, or beamforming, among other examples. The receiver may evaluate the CSI of the channel through measurement of a reference signal (RS) (e.g., CSI-RS or SSB) transmitted from a transmitter over the communication channel. Among other information, a CSI report may indicate one or more of a channel quality indicator (CQI) , precoding matrix indicator (PMI) , CSI-RS resource indicator (CRI) , SS / PBCH Block Resource indicator (SSBRI) , layer indicator (LI) , rank indicator (RI) , L1-RSRP, L1-SINR or Capability Index, for example.
[0078] As an example, a UE may receive a configuration for a reference signal (such as a CSI-RS) to be measured, and a configuration for a CSI report to be provided to the transmitter (e.g., which may be a network entity such as a base station or one or more components of a base station) . A configured CSI-RS may correspond to multiple antenna ports, each corresponding to a channel to be measured. The number of antenna ports (which may be referred to as the “CSI-RS ports” ) used for transmitting the reference signal (e.g., CSI-RS) may vary, and more CSI-RS ports allow for more detailed channel information to be gathered.
[0079] The UE (e.g., as an example of a receiver) may be configured with one or more CSI-RS resource sets, and each CSI-RS resource set may include or indicate one or more configured CSI-RS. The CSI report configuration that the UE receives may indicate one or more CSI-RS resource sets to be measured for a CSI report.
[0080] A CSI report may be periodic, semi-persistent, or aperiodic. In some examples, a CSI report may be initiated by the UE or triggered by an event, which may be referred to as a UE-initiated or event-driven CSI report. The beam report transmission procedure for UE-initiated or event-driven reporting may include two modes, referred to as Mode A and Mode B, respectively. The first mode (e.g., Mode A) may involve dynamically scheduling uplink control information (UCI) by the network (e.g., a gNB) . In the first mode (e.g., Mode A) , when the UE initiates a report, the UE first transmits a first PUCCH (with a one-bit or multi-bit indication) to request a resource for a second uplink channel (or slot) to carry the beam report (e.g., the CSI report) . Then, the UE may detect the DCI format that indicates (e.g., allocates) the resource for this second UL channel. The beam report is then transmitted over the designated second UL channel. The first mode (e.g., Mode A) may be supported as a UE capability, e.g., without the introduction of additional DCI formats.
[0081] The second mode (e.g., Mode B) allows for UCI in pre-configured resources for the second uplink channel (or slot) . In the second mode (e.g., Mode B) , as the first step, the UE transmits a first PUCCH (with a one-bit or multi-bit indication) that notifies the use of a second uplink channel (or slot) for the beam report. Then, as the second step, the UE transmits the beam report using the second uplink channel (e.g., without receiving a DCI that allocates a resource) . The notification may be in a separate reporting instance from the beam report.
[0082] The CSI reference resource in the time domain for a CSI reporting in uplink slot n’ may be defined by a single downlink slot n based on Equation (1) below:
[0083] where Koffset is a parameter configured by higher layer, and is the subcarrier spacing configuration for Koffset with a value of 0 for frequency range 1. The downlink slot n can be computed based on Equation (2) below:
[0084] where μDL and μDL are the subcarrier spacing configurations for downlink and uplink, respectively, and and μoffset (for uplink and downlink) are determined by higher-layer configured parameter ca-SlotOffset for the cells transmitting the uplink and downlink.
[0085] For periodic and semi-persistent CSI reporting, if a single CSI-RS / SSB resource is configured for channel measurement, nCSI_ref is the smallest value greater than or equal to such that it corresponds to a valid downlink slot. If multiple CSI-RS / SSB resources are configured for channel measurements, nCSI_ref is the smallest value greater than or equal to such that it corresponds to a valid downlink slot. For aperiodic CSI reporting, if the UE is indicated by the DCI to report CSI in the same slot as the CSI request, nCSI_ref is such that the reference resource is in the same valid downlink slot as the corresponding CSI request, otherwise nCSI_ref is the smallest value greater than or equal to such as slot n-nCSI_ref corresponds to a valid downlink slot, where Z’ corresponds to the delay requirement.
[0086] In the CSI report framework for periodic, semi-persistent, and aperiodic CSI, a pre-determined uplink slot is used to transmit the report message through the PUCCH or the PUSCH. Based on this pre-determined uplink slot, the CSI reference resource in the time domain is defined, and the occupation of the CPU may be determined based on the CSI reference resource. However, when a CSI report is a UE-initiated or event-triggered CSI report, the uplink slot for transmitting the CSI report is not pre-determined. There may be different modes of a UE-initiated or event-triggered CSI report. In some modes, such as Mode A or Mode B, a first PUCCH may be transmitted before the uplink slot for transmission of the CSI report can be determined. Example aspects presented herein provide methods and apparatus for configuring and managing different modes of UE-initiated CSI reporting (e.g., Mode A and Mode B) and defining CSI resources for UE-initiated or event-driven CSI reports, applicable to both regular CSI reports and LTM CSI reports.
[0087] In some aspects, different modes (e.g., Mode A or Mode B) for UE-initiated or event-driven beam reporting may be implemented implicitly or explicitly through RRC. In the implicit method, the first mode (e.g., Mode A) may be applicable when only the first PUCCH channel configuration exists, while the second mode (e.g., Mode B) may apply when both the first PUCCH channel configuration and a second uplink channel configuration exist. In the explicit method, a mode identifier may be included in a report configuration type (e.g., for UE-initiated / event-driven reports) under a report configuration type (e.g., which may be referred to as reportConfigType for regular CSI reports or ltm-ReportConfigType-r18 for lower-layer-triggered (LTM) CSI reports) in RRC. This identifier helps to distinguish between different modes (e.g., Mode A or Mode B) of UE-initiated or event-driven beam reporting. In the explicit method, if the first mode (e.g., Mode A) applies, the UE may disregard the second uplink channel resource if it is configured. On the other hand, if the second mode (e.g., Mode B) applies, but the UE is not configured with the second uplink channel resource, then the parameter configuration is invalid.
[0088] In some aspects, multiple candidate configurations may be provided to the UE. Each of these multiple candidate configurations may correspond to one or more or a first configuration for the first PUCCH resource or the second configuration for the second uplink resource for transmitting the UE-initiated (or event-trigger) CSI report. For example, one candidate configuration may include the first configuration for the first PUCCH resource but not the second configuration for the second uplink resource, thereby indicating the first mode (e.g., Mode A) . For example, another candidate configuration may include both the first configuration for the first PUCCH resource and the second configuration for the second uplink resource, thereby indicating the second mode (e.g., Mode B) . The UE may dynamically switch between these candidate configurations, and the dynamic switching among these candidate configurations may be implemented via lower layer signaling mechanisms, such as via medium access control –control element (MAC-CE) or downlink control information (DCI) . For example, the UE may receive multiple candidate configurations in RRC signaling, and then may receive an indication in a MAC-CE or DCI that indicates one of the multiple candidate configurations.
[0089] In some examples, for the explicit method, the network (e.g., a gNB) may dynamically switch between different modes (e.g., Mode A or Mode B) using the lower layer signaling, such as via MAC-CE or DCI. In some examples, the multiple candidate configurations, the indication of dynamic switching among these candidate configurations, or the indication of dynamic switching between the two modes (e.g., Mode A and Mode B) may be included a single MAC-CE or DCI.
[0090] In some aspects, the time domain CSI reference resource for UE-initiated or event-driven CSI reports may be defined based on the uplink slot carrying the first PUCCH transmission. The method to define the time domain CSI reference resource for UE-initiated (or event-driven) CSI reports is applicable to both Mode A and Mode B. FIG. 4 is a diagram 400 illustrating the determination of the time domain CSI reference resource for a UE-initiated CSI report in accordance with various aspects of the present disclosure. In FIG. 4, the uplink slot that transmits the first PUCCH 402 is the uplink slot n’ 410. Based on the uplink slot n’ 410, a downlink slot n 420 may be determined based on Equation (2) .
[0091] Based on the uplink slot n’ 410, a parameter may be defined for UE-initiated / event-driven CSI reports, which may be transmitted at uplink slot k 412. In some examples, the parameter may be based on various factors, such as an event type of an event that triggers the UE-initiated CSI report or the number of reference signals to measure for the UE-initiated CSI report. In some examples, the value of parameter may be determined in the same manner as the value of nCSI_ref for periodic and semi-persistent CSI reporting. Using the parameter to replace nCSI_ref in Equation (1) , a time gap g 430 between the downlink slot n 420 and the time domain CSI reference resource 404 is defined based on Equation (3) below:
[0092] Hence, the time domain CSI reference resource 404 may be defined by first determining the downlink slot n 420 based on the uplink n’ 410 that carries the first PUCCH transmission using Equation (2) . Once the downlink slot n 420 is determined, the time domain CSI reference resource 404 may be defined by adjusting the downlink slot n 420 by the time gap g 430 defined by Equation (3) .
[0093] In some aspects, for UE-initiated / event-driven CSI reports with a pre-configured second uplink resource (e.g., in Mode B) , the time domain CSI reference resource may be determined using a two-stage method. FIG. 5 is a diagram 500 illustrating an example of using a two-stage method to determine the time domain CSI reference resource for a UE-initiated CSI report in accordance with various aspects of the present disclosure. In FIG. 5, in the first stage, the UE identifies a tentative time domain CSI reference resource 504 from the uplink slot n’ 512, which carries the CSI report through the second uplink resource. In the second stage, the UE determines the time interval t 540 between this tentative time domain CSI reference resource slot (e.g., 504) and the uplink slot m 510 for the first PUCCH, and compares the time interval t 540 against a time interval threshold T. In some examples, the time interval threshold T may be defined in the wireless communication specification. In some examples, the time interval threshold T may be signaled by the network through RRC. The time interval threshold T may represent the minimum time necessary for the UE to send the first PUCCH signal after detecting the event condition that triggers the UE-initiated CSI report.
[0094] To identify the tentative time domain CSI reference resource 504, a downlink slot n 520 may be determined based on the uplink slot n’ 512 according to Equation (2) . Then, the UE may compute a parameter for UE-initiated / event-driven CSI reports based on the uplink slot n’ 512. In some examples, the parameter may be based on various factors, such as an event type of an event that triggers the UE-initiated CSI report or the number of reference signals to measure for the UE-initiated CSI report. In some examples, the value of parameter may be determined in the same manner as the value of nCSI_ref for periodic and semi-persistent CSI reporting. Using the parameter to replace nCSI_ref in Equation (1) , a time gap g 530 between the downlink slot n 520 and the tentative time domain CSI reference resource 504 can be computed using Equation (4) below:
[0095] After the time interval t 540 between the tentative time domain CSI reference resource 504 and the uplink slot m 510 that carries the first PUCCH has been determined, the UE may manage the UE-initiated CSI report based on the comparison between the time interval t 540 and the time interval threshold T. FIG. 6 is a diagram 600 illustrating the example managements of UE-initiated CSI reports in accordance with various aspects of the present disclosure. In FIG. 6, if the time interval t (e.g., time interval t 540) is equal to or greater than the time interval threshold T, the tentative time domain CSI reference resource is considered valid, and the UE 602 may follow the regular CSI report process. For example, the UE 602 may set the tentative time domain CSI reference resource (e.g., 504) to be the CSI reference resource and, at 612, perform measurements for the UE-initiated CSI report. The UE 602 may further transmit the first PUCCH to the base station 604 at 620 and transmit the UE-initiated CSI report to the base station 604 at 622, depicted as scheme #1 630 in FIG. 6.
[0096] In some examples, if the time interval t (e.g., time interval t 540) is less than the time interval threshold T, the UE may manage the UE-initiated CSI report in different ways. In one configuration, the UE 602 may still perform the CSI measurement at 612, counting this action toward the CSI processing unit (CPU) occupation. However, the UE 602 may skip the first PUCCH transmission at 616, depicted as scheme #2 632 in FIG. 6.
[0097] In some examples, after the UE 602 skipped the first PUCCH transmission at 616, the UE 602 may further skip the UE-initiated CSI report at 618 because of the absence of the first PUCCH. In some examples, the measurement data or the report itself may be deferred to the next available second uplink resource opportunity. For example, the UE 602 may transmit the second UE-initiated CSI report to the base station 604 at the next available second uplink resource opportunity (e.g., at 624) , and the second UE-initiated CSI report may carry the measurement obtained at 612. In some examples, if the base station 604 is capable of blind detection of the second uplink resource without the initial PUCCH (e.g., at 620) , the UE 602 may still transmit the UE-initiated CSI report through the second uplink resource at 622, even though the first PUCCH was not transmitted. In this case, the CPU for the UE-initiated CSI report is occupied until the slot for the UE-initiated CSI report (e.g., the second uplink channel) .
[0098] In some examples, if the time interval t (e.g., time interval t 540) is less than the time interval threshold T, the UE 602 may entirely skip the CSI measurement for the UE- initiated CSI report at 614, which means the CPU for the UE-initiated CSI report is not occupied. Then, the UE 602 may further skip the first PUCCH transmission at 616 and skip the UE-initiated CSI report at 618, depicted as scheme #3 634 in FIG. 6. The management of these schemes (e.g., scheme #1 630, scheme #1 632, scheme #1 634) may be controlled through RRC parameters, such as an existing parameter (e.g., timeRestrictionForChannelMeasurements) or new parameters for UE-initiated / event-driven CSI reporting. These parameters allow the UE to either give up an instance (e.g., skip the CSI measurement at 614) when time restrictions are applied or perform the CSI measurement (e.g., at 612) without sending out a report (e.g., skip the UE-initiated CSI report at 618) .
[0099] In some aspects, for UE-initiated or event-driven CSI reports, two different time domain CSI reference resources may be defined. FIG. 7 is a diagram 700 illustrating an example of separated CSI resources for UE-initiated CSI reports in accordance with various aspects of the present disclosure. In FIG. 7, the first CSI reference resource 702 may be designated for evaluating the event condition for the UE-imitated CSI report. The first CSI reference resource 702 may be defined based on the uplink slot n’ 710 that carries the first PUCCH signal. The CPU for the first CSI reference resource, which may be referred to as the first CPU, may be occupied until the transmission of the first PUCCH (e.g., at 710) .
[0100] For example, to define the first CSI reference resource 702, a downlink slot n0 420 may be determined based on the uplink slot n’ 710 using Equation (5) below:
[0101] Then, based on the uplink slot n’ 710, a parameter may be defined for UE-initiated CSI reports. The parameter may be based on various factors, such as an event type of an event that triggers the UE-initiated CSI report or the number of reference signals to measure for the UE-initiated CSI report. In some examples, the value of parameter may be determined in the same manner as the value of nCSI_ref for periodic and semi-persistent CSI reporting. Using the parameter to replace nCSI_ref in Equation (1) , a time gap g1 732 between the downlink slot n 720 and the first CSI reference resource 702 is defined based on Equation (6) below:
[0102] The second CSI reference resource 704 may be designated to determine the timeline for the CSI calculation and subsequent report generation. The second CSI reference resource 704 may be defined based on the uplink slot n” 712 that carries the CSI report message. The CPU for the second CSI reference resource, which may be referred to as the second CPU, may be considered occupied until the occurrence of the next first PUCCH transmission. In some examples, if there is any overlapping between the occupation duration for the first CPU and the occupation duration for the second CPU, then the CPU occupation during the overlapped duration may be either the sum of the first CPU and the second CPU or the larger of the first CPU or the second CPU.
[0103] In some examples, to define the second CSI reference resource 704, a downlink slot n1 722 may be determined based on the uplink slot n” 712 using Equation (7) below:
[0104] Then, the UE may compute a parameter for UE-initiated / event-driven CSI reports based on the uplink slot n” 712. In some examples, the parameter may be based on various factors, such as an event type of an event that triggers the UE-initiated CSI report, or the number of reference signals to measure for the UE-initiated CSI report. In some examples, the value of parameter may be determined in the same manner as the value of nCSI_ref for periodic and semi-persistent CSI reporting. Using the parameter to replace nCSI_ref in Equation (1) , a time gap g2 734 between the downlink slot n1 722 and the second CSI reference resource 704 can be computed using Equation (8) below:
[0105] FIG. 8 is a call flow diagram 800 illustrating a method of wireless communication in accordance with various aspects of this present disclosure. Various aspects are described in connection with a UE 802 and a base station 804. The aspects may be performed by the UE 802 or the base station 804 in aggregation and / or by one or more components of a base station 804 (e.g., a CU 110, a DU 130, and / or an RU 140) .
[0106] As shown in FIG. 8, at 806, the UE 802 may receive a mode identifier from the base station 804. The mode identifier may indicate one of the first mode (e.g., Mode A) or the second mode (e.g., Mode B) for a CSI report mode. The management of the CSI report may be based on the mode identifier. In some examples, the mode identifier may be included in RRC signaling from the base station 804. In some examples, the mode identifier may be included in a MAC-CE or DCI from the base station 804.
[0107] In some examples, at 808, the UE 802 may receive multiple candidate configurations from the base station 804. Each candidate configuration may correspond to one or more of the first configuration for the first PUCCH transmission (e.g., the first PUCCH transmission at uplink slot n’ 710) or the second configuration for the CSI uplink slot (e.g., uplink slot n” 712) for the UE-initiated CSI report. For example, one candidate configuration may include both the first configuration and the second configuration, indicating the second mode (e.g., Mode B) for the CSI report mode, while another candidate configuration may include the first configuration but not the second configuration, indicating the first mode (e.g., Mode A) for the CSI report mode.
[0108] In some examples, at 810, the UE 802 may further receive a lower layer signaling indicating one candidate configuration of the multiple configurations to be used. The management of the CSI report may be based on the one candidate configuration of the multiple candidate configurations. In some examples, the multiple candidate configurations (at 808) and the lower layer signaling (at 810) may be provided in a single MAC-CE or DCI.
[0109] At 812, the UE 802 may receive an interval threshold from RRC signaling from the base station 804. The interval threshold may be used to identify the CSI reference resource for the UE-initiated CSI report (e.g., 816) . In some examples, the interval threshold may be pre-defined in a wireless communication specification, and the UE may obtain the interval threshold from the pre-defined number.
[0110] At 814, the UE 802 may receive a capability indication from the base station 804 regarding its blind detection capability. For example, a base station with blind detection capability can detect the uplink resource for the UE-initiated CSI report without a prior PUCCH transmission (e.g., the first PUCCH transmission at uplink slot n’ 410) . In some examples, based on the blind detection capability, the UE may determine whether to transmit a UE-initiated CSI report when a prior PUCCH transmission was not transmitted. For example, in FIG. 6, if the base station 604 has the blind detection capability, the UE 602 may transmit the UE-initiated CSI report at 633, even if the UE 602 has skipped the first PUCCH transmission at 616. In some examples, the capability indication may be transmitted by the base station 804 via an RRC message.
[0111] At 816, the UE 802 may identify a CSI reference resource for the UE-initiated CSI report. For example, referring to FIG. 4, the UE may identify the CSI reference resource 404 based on the first uplink slot n’ 410 carrying the first PUCCH transmission.
[0112] In some examples, to identify the CSI reference resource for the UE-initiated CSI report, the UE may 802 may, at 818, determine a tentative CSI reference resource (e.g., 504) based on the CSI uplink slot (e.g., uplink slot n’ 512) for the UE-initiated CSI report. Then, at 820, the UE 802 may determine the time interval (e.g., time interval t 540) between the first uplink slot for the first PUCCH transmission (e.g., uplink slot m 510) and the tentative CSI reference resource (e.g., 504) . At 822, the UE 802 may identify the CSI reference resource for the UE-initiated CSI report based on a comparison of the time interval (e.g., time interval t 540) and the interval threshold (e.g., the interval threshold received at 812) . For example, the UE 802 may identify the CSI reference resource for the UE-initiated CSI report based on whether the time interval exceeds the interval threshold.
[0113] At 824, the UE 802 may manage the UE-initiated CSI report based on the CSI report mode (e.g., Mode A or Mode B) and the CSI reference resource. In some examples, the CSI report mode may include one of the first mode (e.g., Mode A) or the second mode (e.g., Mode B) . In the first mode (e.g., Mode A) , the UE may be provided with the first configuration for a first PUCCH transmission, but not the configuration for the uplink slot for the UE-initiated CSI report. In the second mode (e.g., Mode B) , the UE may be provided with the first configuration for the first PUCCH transmission and a second configuration for an uplink slot for the UE-initiated CSI report (e.g., uplink slot n’ 512) .
[0114] The UE 802 may identify the CSI reference resource and manage the UE-initiated CSI report based on whether the time interval (e.g., time interval t 540) between the first uplink slot for the first PUCCH transmission (e.g., uplink slot m 510) and the tentative CSI reference resource (e.g., 504) exceeds the interval threshold.
[0115] In some examples, if the time interval (e.g., time interval t 540) is greater than or equal to the interval threshold, the UE 802 may set the tentative CSI reference resource (e.g., 504) to be the CSI reference resource. Then, the UE 802 may perform measurements for the UE-initiated CSI report based on the CSI reference resource (at 826) , transmit the first PUCCH transmission to the base station 804 (at 830) , and transmit the UE-initiated CSI report to the base station 804 (at 834) .
[0116] In some examples, if the time interval (e.g., time interval t 540) is less than the interval threshold, the UE 802 may still set the tentative CSI reference resource (e.g., 504) to be the CSI reference resource, and perform measurements for the UE-initiated CSI report based on the CSI reference resource (at 826) . However, the UE 802 may skip the first PUCCH transmission (at 832) .
[0117] In some examples, after skipping the first PUCCH transmission (at 832) , the UE 802 may also skip the UE-initiated CSI report at the CSI uplink slot (at 836) .
[0118] In some examples, if the UE 802 has performed the measurements for the UE-initiated CSI report (at 826) but does not transmit the UE-initiated CSI report (e.g., skips the UE-initiated CSI report at 836) at the CSI uplink slot, the UE 802 may, at 838, transmit a second UE-initiated CSI report at a subsequent uplink slot following the CSI uplink slot, and the second UE-initiated CSI report may include the measurements for the UE-initiated CSI report (e.g., the measurements performed at 826) .
[0119] In some examples, if the UE 802 does not transmit the first PUCCH (e.g., skips the first PUCCH transmission at 832) , but the base station 804 has the blind detection capability to detect the uplink resource for the UE-initiated CSI report without receiving first PUCCH (e.g., based on the capability indication received at 814) , the UE 802 may, at 834, transmit the UE-initiated CSI report even though the UE 802 has skipped the first PUCCH transmission at 832. In this case, the CPU for the UE-initiated CSI report is considered occupied until the CSI uplink slot for the UE-initiated CSI report.
[0120] In some examples, if the time interval (e.g., time interval t 540) is less than the interval threshold, the UE 802 may skip the measurements for the UE-initiated CSI report (at 828) . Then, the UE 802 may also skip the first PUCCH transmission (at 832) and the UE-initiated CSI report (at 836) .
[0121] FIG. 9 is a flowchart 900 illustrating methods of wireless communication at a UE in accordance with various aspects of the present disclosure. The method may be performed by a UE in cooperation with a network entity. The UE may be the UE 104, 350, 602, 802, or the apparatus 1304 in the hardware implementation of FIG. 13. The network entity may be a base station, or a component of a base station, in the access network of FIG. 1 or a core network component (e.g., base station 102, 310, 604, 804; or the network entity 1302 in the hardware implementation of FIG. 13) . By enabling the UE to configure and manage different mode (e.g., Mode A or Mode B) and to define CSI reference resources for UE-initiated CSI reports based on the timing of relevant events for the CSI reports, the methods enhance efficiency and resource utilization in wireless communication. Additionally, by enabling the UE to modify the CSI reporting, such as deferring CSI reports or adjusting measurement schedules based on varying conditions, the methods improve the relevance and effectiveness of the CSI reports, thereby enhancing the overall performance of wireless communication.
[0122] As shown in FIG. 9, at 902, the UE may identify a CSI reference resource for a UE-initiated CSI report. FIG. 4, FIG. 5, FIG. 6, FIG. 7, and FIG. 8 illustrate various aspects of the steps in connection with flowchart 900. For example, referring to FIG. 8, the UE 802 may, at 816, identify a CSI reference resource for a UE-initiated CSI report. For example, the UE may identify the CSI reference resource 404 for a UE-initiated CSI report to be transmitted at uplink slot k 412. In some aspects, 902 may be performed by the CSI configuration component 198.
[0123] At 904, the UE may manage the UE-initiated CSI report based on a CSI report mode and the CSI reference resource. The CSI report mode may include one of a first mode or a second mode. The first mode may indicate a first PUCCH transmission, and the second mode may indicate the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report. For example, referring to FIG. 8, the UE 802 may, at 824, manage the UE-initiated CSI report based on a CSI report mode and the CSI reference resource. The CSI report mode may include one of a first mode (e.g., Mode A) or a second mode (e.g., Mode B) . The first mode (e.g., Mode A) may indicate a first PUCCH transmission (e.g., at uplink slot n’ 410) , and the second mode (e.g., Mode B) may indicate the first PUCCH transmission (e.g., at uplink slot n’ 410) and a CSI uplink slot (e.g., at uplink slot k 412) for the UE-initiated CSI report. In some aspects, 904 may be performed by the CSI configuration component 198.
[0124] FIG. 10 is a flowchart 1000 illustrating methods of wireless communication at a UE in accordance with various aspects of the present disclosure. The method may be performed by a UE in cooperation with a network entity. The UE may be the UE 104, 350, 602, 802, or the apparatus 1304 in the hardware implementation of FIG. 13. The network entity may be a base station, or a component of a base station, in the access network of FIG. 1 or a core network component (e.g., base station 102, 310, 604, 804; or the network entity 1302 in the hardware implementation of FIG. 13) . By enabling the UE to configure and manage different mode (e.g., Mode A or Mode B) and to define CSI reference resources for UE-initiated CSI reports based on the timing of relevant events for the CSI reports, the methods enhance efficiency and resource utilization in wireless communication. Additionally, by enabling the UE to modify the CSI reporting, such as deferring CSI reports or adjusting measurement schedules based on varying conditions, the methods improve the relevance and effectiveness of the CSI reports, thereby enhancing the overall performance of wireless communication.
[0125] As shown in FIG. 10, at 1012, the UE may identify a CSI reference resource for a UE-initiated CSI report. FIG. 4, FIG. 5, FIG. 6, FIG. 7, and FIG. 8 illustrate various aspects of the steps in connection with flowchart 1000. For example, referring to FIG. 8, the UE 802 may, at 816, identify a CSI reference resource for a UE-initiated CSI report. For example, the UE may identify the CSI reference resource 404 for a UE-initiated CSI report to be transmitted at uplink slot k 412. In some aspects, 1012 may be performed by the CSI configuration component 198.
[0126] At 1014, the UE may manage the UE-initiated CSI report based on a CSI report mode and the CSI reference resource. The CSI report mode may include one of a first mode or a second mode. The first mode may indicate a first PUCCH transmission, and the second mode may indicate the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report. For example, referring to FIG. 8, the UE 802 may, at 824, manage the UE-initiated CSI report based on a CSI report mode and the CSI reference resource. The CSI report mode may include one of a first mode (e.g., Mode A) or a second mode (e.g., Mode B) . The first mode (e.g., Mode A) may indicate a first PUCCH transmission (e.g., at uplink slot n’ 410) , and the second mode (e.g., Mode B) may indicate the first PUCCH transmission (e.g., at uplink slot n’ 410) and a CSI uplink slot (e.g., at uplink slot k 412) for the UE-initiated CSI report. In some aspects, 1014 may be performed by the CSI configuration component 198.
[0127] In some aspects, the management of the UE-initiated CSI report is based on the first mode when the UE has received, from the network entity, a first configuration for the first PUCCH transmission but not a second configuration for the CSI uplink slot for the UE-initiated CSI report, and the management of the UE-initiated CSI report is based on the second mode when the UE has received, from the network entity, the first configuration for the first PUCCH transmission and the second configuration for the CSI uplink slot for the UE-initiated CSI report. For example, referring to FIG. 4, the management of the UE-initiated CSI report is based on the first mode (e.g., Mode A) when the UE has received a first configuration for the first PUCCH transmission (e.g., the first PUCCH 402 at uplink slot n’ 410) but not a second configuration for the CSI uplink slot (e.g., uplink slot k 412) for the UE-initiated CSI report, and the management of the UE-initiated CSI report is based on the second mode (e.g., Mode B) when the UE has received the first configuration for the first PUCCH transmission (e.g., the first PUCCH 402 at uplink slot n’ 410) and the second configuration for the CSI uplink slot (e.g., uplink slot k 412) for the UE-initiated CSI report.
[0128] In some aspects, at 1002, the UE may receive, from the network entity, a mode identifier indicating one of the first mode or the second mode. The management of the CSI report is based on the mode identifier, and the mode identifier is included in one or more of RRC signaling, a medium access control-control element (MAC-CE) , or downlink control information (DCI) . For example, referring to FIG. 8, the UE 802 may, at 806, receive, from the network entity (base station 804) , a mode identifier indicating one of the first mode (e.g., Mode A) or the second mode (e.g., Mode B) . The management of the CSI report (e.g., at 824) is based on the mode identifier, and the mode identifier is included in one or more of RRC signaling, a MAC-CE, or DCI. In some aspects, 1002 may be performed by the CSI configuration component 198.
[0129] In some aspects, at 1004, the UE may receive, from a network entity, multiple candidate configurations each corresponding to one or more of a first configuration for the first PUCCH transmission or a second configuration for the CSI uplink slot for the UE-initiated CSI report. At 1006, the UE may receive a lower layer signaling indicating one candidate configuration of the multiple configurations. The management of the CSI report is based on the one candidate configuration of the multiple candidate configurations, and the multiple candidate configurations and the lower layer signaling are provided in a MAC-CE or DCI. For example, referring to FIG. 8, the UE 802 may, at 808, receive from a network entity (base station 804) multiple candidate configurations each corresponding to one or more of a first configuration for the first PUCCH transmission (e.g., the first PUCCH 402) or a second configuration for the CSI uplink slot (e.g., uplink slot k 412) for the UE-initiated CSI report. At 810, the UE 802 may receive a lower layer signaling indicating one candidate configuration of the multiple configurations. The management of the CSI report (e.g., at 824) is based on the one candidate configuration of the multiple candidate configurations, and the multiple candidate configurations and the lower layer signaling are provided in a MAC-CE or DCI. In some aspects, 1004 and 1006 may be performed by the CSI configuration component 198.
[0130] In some aspects, at 1012, the UE may identify the CSI reference resource for the UE-initiated CSI report based on a first uplink slot carrying the first PUCCH transmission. For example, referring to FIG. 8, the UE 802 may, at 816, identify the CSI reference resource for the UE-initiated CSI report based on a first uplink slot (e.g., uplink slot n’ 410) carrying the first PUCCH transmission (e.g., first PUCCH 402) .
[0131] In some aspects, the CSI reference resource may be based on the first uplink slot carrying the first PUCCH transmission and a first time gap. The first time gap may be based on one or more of: an event type of an event triggering the UE-initiated CSI report, or the number of reference signals for measurement for the UE-initiated CSI report. For example, referring to FIG. 4, the CSI reference resource (e.g., 404) may be based on the first uplink slot (e.g., uplink slot n’ 410) carrying the first PUCCH transmission and a first time gap (e.g., time gap g 430) . The first time gap (e.g., time gap g 430) may be computed using Equation (3) based on parameter which is based on various factors, such as an event type of an event that triggers the UE-initiated CSI report, or the number of reference signals to measure for the UE-initiated CSI report.
[0132] In some aspects, the CSI report mode may include the second mode (e.g., Mode B) . To identify the CSI reference resource for the UE-initiated CSI report (at 1012) , the UE may determine a tentative CSI reference resource based on the CSI uplink slot for the UE-initiated CSI report; determine a time interval between a first uplink slot for the first PUCCH transmission and the tentative CSI reference resource; and identify the CSI reference resource for the UE-initiated CSI report based on the comparison of the time interval and an interval threshold. For example, referring to FIG. 8, the UE 802 may, at 818, determine a tentative CSI reference resource (e.g., 504) based on the CSI uplink slot (e.g., uplink slot n’ 512) for the UE-initiated CSI report, at 820, determine a time interval (e.g., time interval t 540) between a first uplink slot (e.g., uplink slot m 510) for the first PUCCH transmission and the tentative CSI reference resource (e.g., 504) , and, at 822, identify the CSI reference resource for the UE-initiated CSI report based on the comparison of the time interval (e.g., time interval t 540) and an interval threshold (e.g., the interval threshold received at 812) .
[0133] In some aspects, at 1008, the UE may obtain the interval threshold based on a pre-defined number or from RRC signaling. For example, referring to FIG. 8, the UE 802 may, at 812, obtain the interval threshold via RRC signaling from the base station 804. In some aspects, 1008 may be performed by the CSI configuration component 198.
[0134] In some aspects, at 1012, the UE may identify the CSI reference resource for the UE-initiated CSI report based on the comparison of the time interval and the interval threshold. For example, if the time interval is greater than or equal to the interval threshold, the UE may set the tentative CSI reference resource to be the CSI reference resource. In that case, the UE may, at 1020, perform measurements for the UE-initiated CSI report based on the CSI reference resource, transmit the first PUCCH transmission to a network entity (at 1022) , and transmit the UE-initiated CSI report to the network entity (at 1024) . For example, referring to FIG. 5 and FIG. 6, if the time interval (e.g., time interval t 540) is greater than or equal to the interval threshold, the UE may, based on scheme #1 630, perform measurements for the UE-initiated CSI report (at 612) based on the CSI reference resource, transmit the first PUCCH transmission to a base station 604 (at 620) , and transmit the UE-initiated CSI report to the base station 604 (at 622) . In some aspects, 1020, 1022, and 1024 may be performed by the CSI configuration component 198.
[0135] In some examples, when the time interval is less than the interval threshold, the UE may set the tentative CSI reference resource to be the CSI reference resource. When managing the UE-initiated CSI report (at 1014) , the UE may perform measurements for the UE-initiated CSI report based on the CSI reference resource (at 1020) . However, the UE may skip the first PUCCH transmission (at 1032) . For example, referring to FIG. 5 and FIG. 6, if the time interval (e.g., time interval t 540) is less than the interval threshold, the UE may, following scheme #2 632, perform measurements for the UE-initiated CSI report based on the CSI reference resource (at 612) , and skip the first PUCCH transmission (at 616) . In some aspects, 1032 may be performed by the CSI configuration component 198.
[0136] In some aspects, after skipping the first PUCCH transmission (at 1032) , the UE may also skip the UE-initiated CSI report (at 1034) . The CSI processing unit (CPU) for the UE-initiated CSI report may be considered occupied until the first uplink slot for the first PUCCH transmission. For example, referring to FIG. 6, following scheme #2 632, after skipping the first PUCCH transmission (at 616) , the UE may also skip the UE-initiated CSI report (at 618) . In some aspects, 1034 may be performed by the CSI configuration component 198.
[0137] In some aspects, after skipping the UE-initiated CSI report (at 1034) , the UE may, at 1036, transmit a second UE-initiated CSI report at a subsequent uplink slot following the CSI uplink slot. The second UE-initiated CSI report includes the measurements for the UE-initiated CSI report (which was measured at 1020) . For example, referring to FIG. 6, after skipping the UE-initiated CSI report (at 618) , the UE may, at 624, transmit a second UE-initiated CSI report at a subsequent uplink slot following the CSI uplink slot. Referring to FIG. 8, the UE 802 may, at 838, transmit a second UE-initiated CSI report at a subsequent uplink slot following the CSI uplink slot. The second UE-initiated CSI report includes the measurements for the UE-initiated CSI report (which was measured at 826) . In some aspects, 1036 may be performed by the CSI configuration component 198.
[0138] In some aspects, if the network entity has a blind detection capability without the first PUCCH transmission, the UE may, at 1024, transmit the UE-initiated CSI report even though the first PUCCH transmission was skipped (at 1032) . In this case, the CPU for the UE-initiated CSI report is considered occupied until the CSI uplink slot for the UE-initiated CSI report. For example, referring to FIG. 6, following scheme #2 632, if the base station 604 has a blind detection capability without the first PUCCH transmission, the UE 602 may, at 622, transmit the UE-initiated CSI report even though the first PUCCH transmission was skipped (at 616) .
[0139] In some aspects, the blind detection capability may be indicated to the UE by the network entity. For example, at 1010, the UE may receive, via an RRC message from the network entity, a capability indication for the blind detection capability without the first PUCCH transmission. For example, referring to FIG. 8, the blind detection capability may be indicated to the UE 802 by the network entity (base station 804) at 814. In some aspects, 1010 may be performed by the CSI configuration component 198.
[0140] In some aspects, if the time interval is less than the interval threshold, the UE may, at 1030, skip measurements for the UE-initiated CSI report, skip the first PUCCH transmission (at 1032) , and skip the UE-initiated CSI report (at 1034) . For example, referring to FIG. 8, if the time interval is less than the interval threshold, the UE 802 may, at 828, skip measurements for the UE-initiated CSI report, skip the first PUCCH transmission (at 832) , and skip the UE-initiated CSI report (at 836) . Referring to FIG. 6, following scheme #3 634, if the time interval (e.g., time interval t 540) is less than the interval threshold, the UE 602 may, at 614, skip measurements for the UE-initiated CSI report, skip the first PUCCH transmission (at 616) , and skip the UE-initiated CSI report (at 618) . In some aspects, 1030, 1032, and 1034 may be performed by the CSI configuration component 198.
[0141] In some aspects, the CSI reference resource may include a first CSI reference resource and a second CSI reference resource. The first CSI reference resource may be designated for evaluating an event condition for the UE-initiated CSI report, and the second CSI reference resource is designated for measurements and reporting of the UE-initiated CSI report. For example, referring to FIG. 7, the CSI reference resource may include a first CSI reference resource (e.g., 702) and a second CSI reference resource (e.g., 704) . The first CSI reference resource (e.g., 702) may be designated for evaluating an event condition for the UE-initiated CSI report, and the second CSI reference resource (e.g., 704) is designated for measurements and reporting of the UE-initiated CSI report.
[0142] In some aspects, the first CSI reference resource may be based on a first uplink slot for the first PUCCH transmission, and the second CSI reference resource may be based on a second uplink slot for the UE-initiated CSI report. A first CPU corresponding to the first CSI reference resource may be considered occupied until the first uplink slot for first PUCCH transmission, and a second CPU corresponding to the second CSI reference resource may be considered occupied until the second uplink slot for the UE-initiated CSI report. For example, referring to FIG. 7, the first CSI reference resource (e.g., 702) may be based on a first uplink slot (e.g., uplink slot n’ 710) for the first PUCCH transmission, and the second CSI reference resource (e.g., 704) may be based on a second uplink slot (e.g., uplink slot n” 712) for the UE-initiated CSI report. A first CPU corresponding to the first CSI reference resource (e.g., 702) may be considered occupied until the first uplink slot (e.g., uplink slot n’ 710) for first PUCCH transmission, and a second CPU corresponding to the second CSI reference resource (e.g., 704) may be considered occupied until the second uplink slot (e.g., uplink slot n” 712) for the UE-initiated CSI report.
[0143] In some aspects, a combined CPU occupation during an overlapping duration when the first CPU and the second CPU are occupied may be one of: the sum of the first CPU and the second CPU, or the larger of the first CPU or the second CPU. For example, referring to FIG. 7, a combined CPU occupation during an overlapping duration when the first CPU (occupied until the first uplink slot (e.g., uplink slot n’ 710) ) and the second CPU (occupied until the second uplink slot (e.g., uplink slot n” 712) for the UE-initiated CSI report) are occupied may be one of: the sum of the first CPU and the second CPU, or the larger of the first CPU or the second CPU.
[0144] FIG. 11 is a flowchart 1100 illustrating methods of wireless communication at a network entity in accordance with various aspects of the present disclosure. The method may be performed by a network entity in cooperation with a UE. The network entity may be a base station, or a component of a base station, in the access network of FIG. 1 or a core network component (e.g., base station 102, 310, 604, 804; or the network entity 1302 in the hardware implementation of FIG. 13) . The UE may be the UE 104, 350, 602, 802, or the apparatus 1304 in the hardware implementation of FIG. 13. By enabling the UE to configure and manage different mode (e.g., Mode A or Mode B) and to define CSI reference resources for UE-initiated CSI reports based on the timing of relevant events for the CSI reports, the methods enhance efficiency and resource utilization in wireless communication. Additionally, by enabling the UE to modify the CSI reporting, such as deferring CSI reports or adjusting measurement schedules based on varying conditions, the methods improve the relevance and effectiveness of the CSI reports, thereby enhancing the overall performance of wireless communication.
[0145] As shown in FIG. 11, at 1102, the network entity may indicate, to the UE, a CSI report mode for a UE-initiated CSI report to be one of a first mode or a second mode. The first mode may indicate a first PUCCH transmission, and the second mode may indicate the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report. FIG. 4, FIG. 5, FIG. 6, FIG. 7, and FIG. 8 illustrate various aspects of the steps in connection with flowchart 1100. For example, referring to FIG. 8, the network entity (base station 804) may, at 806, indicate to the UE 802 a CSI report mode for a UE-initiated CSI report to be one of a first mode (e.g., Mode A) or a second mode (e.g., Mode B) . The first mode (e.g., Mode A) may indicate a first PUCCH transmission, and the second mode (e.g., Mode B) may indicate the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report. In some aspects, 1102 may be performed by the CSI configuration component 199.
[0146] At 1104, the network entity may receive from the UE the UE-initiated CSI report on a CSI reference resource. The CSI reference resource may be based on a first uplink slot carrying the first PUCCH transmission. For example, referring to FIG. 8, the network entity (base station 804) may, at 834, receive from the UE 802 the UE-initiated CSI report on a CSI reference resource. The CSI reference resource may be based on a first uplink slot (e.g., uplink slot n’ 410) carrying the first PUCCH transmission. In some aspects, 1104 may be performed by the CSI configuration component 199.
[0147] FIG. 12 is a flowchart 1200 illustrating methods of wireless communication at a network entity in accordance with various aspects of the present disclosure. The method may be performed by a network entity in cooperation with a UE. The network entity may be a base station, or a component of a base station, in the access network of FIG. 1 or a core network component (e.g., base station 102, 310, 604, 804; or the network entity 1302 in the hardware implementation of FIG. 13) . The UE may be the UE 104, 350, 602, 802, or the apparatus 1304 in the hardware implementation of FIG. 13. By enabling the UE to configure and manage different mode (e.g., Mode A or Mode B) and to define CSI reference resources for UE-initiated CSI reports based on the timing of relevant events for the CSI reports, the methods enhance efficiency and resource utilization in wireless communication. Additionally, by enabling the UE to modify the CSI reporting, such as deferring CSI reports or adjusting measurement schedules based on varying conditions, the methods improve the relevance and effectiveness of the CSI reports, thereby enhancing the overall performance of wireless communication.
[0148] As shown in FIG. 12, at 1202, the network entity may indicate, to the UE, a CSI report mode for a UE-initiated CSI report to be one of a first mode or a second mode. The first mode may indicate a first PUCCH transmission, and the second mode may indicate the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report. FIG. 4, FIG. 5, FIG. 6, FIG. 7, and FIG. 8 illustrate various aspects of the steps in connection with flowchart 1200. For example, referring to FIG. 8, the network entity (base station 804) may, at 806, indicate to the UE 802 a CSI report mode for a UE-initiated CSI report to be one of a first mode (e.g., Mode A) or a second mode (e.g., Mode B) . The first mode (e.g., Mode A) may indicate a first PUCCH transmission, and the second mode (e.g., Mode B) may indicate the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report. In some aspects, 1202 may be performed by the CSI configuration component 199.
[0149] At 1208, the network entity may receive from the UE the UE-initiated CSI report on a CSI reference resource. The CSI reference resource may be based on a first uplink slot carrying the first PUCCH transmission. For example, referring to FIG. 8, the network entity (base station 804) may, at 834, receive from the UE 802 the UE-initiated CSI report on a CSI reference resource. The CSI reference resource may be based on a first uplink slot (e.g., uplink slot n’ 410) carrying the first PUCCH transmission. In some aspects, 1208 may be performed by the CSI configuration component 199.
[0150] In some aspects, the network entity may indicate the CSI report mode to the UE (at 1202) based on a first configuration for the first PUCCH transmission and a second configuration for the CSI uplink slot for the UE-initiated CSI report. For example, if only the first configuration for the first PUCCH transmission is present and the second configuration for the CSI uplink slot is not present, this indicates that the network entity is indicating the first mode (e.g., Mode A) . On the other hand, if both the first configuration and the second configuration are present, this indicates that the network entity is indicating the second mode (e.g., Mode B) . For example, referring to FIG. 8, the network entity (base station 804) may indicate the CSI report mode to the UE (at 806) based on a first configuration for the first PUCCH transmission (e.g., first PUCCH 402) and a second configuration for the CSI uplink slot (e.g., uplink slot k 412) for the UE-initiated CSI report. For example, if only the first configuration for the first PUCCH transmission (e.g., first PUCCH 402) is present and the second configuration for the CSI uplink slot (e.g., uplink slot k 412) is not present, this indicates that the network entity is indicating the first mode (e.g., Mode A) . On the other hand, if both the first configuration and the second configuration are present, this indicates that the network entity is indicating the second mode (e.g., Mode B) .
[0151] In some aspects, to indicate the CSI report mode for the UE-initiated CSI report (at 1202) , the network entity may transmit to the UE a mode identifier indicating one of the first mode or the second mode, and the mode identifier may be included in one or more of RRC signaling, a MAC-CE, or DCI. For example, referring to FIG. 8, the network entity (base station 804) may, at 806, transmit to the UE 802 a mode identifier indicating one of the first mode or the second mode, and the mode identifier may be included in one or more of RRC signaling, a MAC-CE, or DCI.
[0152] In some aspects, the network entity may, at 1204, transmit, to a UE, multiple candidate configurations each corresponding to one or more of a first configuration for the first PUCCH transmission or a second configuration for the CSI uplink slot for the UE-initiated CSI report. At 1206, the network entity may further transmit a lower layer signaling indicating one candidate configuration of the multiple configurations. The CSI report mode may be based on the one candidate configuration of the multiple candidate configurations, and the multiple candidate configurations and the lower layer signaling may be provided in a MAC-CE or DCI. For example, referring to FIG. 8, the network entity (base station 804) may, at 808, transmit to a UE 802 multiple candidate configurations each corresponding to one or more of a first configuration for the first PUCCH transmission or a second configuration for the CSI uplink slot for the UE-initiated CSI report. At 810, the network entity (base station 804) may further transmit a lower layer signaling indicating one candidate configuration of the multiple configurations. In some aspects, 1204 and 1206 may be performed by the CSI configuration component 199.
[0153] FIG. 13 is a diagram 1300 illustrating an example of a hardware implementation for an apparatus 1304. The apparatus 1304 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, the apparatus 1304 may include at least one cellular baseband processor (or processing circuitry) 1324 (also referred to as a modem) coupled to one or more transceivers 1322 (e.g., cellular RF transceiver) . The cellular baseband processor (s) (or processing circuitry) 1324 may include at least one on-chip memory (or memory circuitry) 1324'. In some aspects, the apparatus 1304 may further include one or more subscriber identity modules (SIM) cards 1320 and at least one application processor (or processing circuitry) 1306 coupled to a secure digital (SD) card 1308 and a screen 1310. The application processor (s) (or processing circuitry) 1306 may include on-chip memory (or memory circuitry) 1306'. In some aspects, the apparatus 1304 may further include a Bluetooth module 1312, a WLAN module 1314, an SPS module 1316 (e.g., GNSS module) , one or more sensor modules 1318 (e.g., barometric pressure sensor / altimeter; motion sensor such as inertial measurement unit (IMU) , gyroscope, and / or accelerometer (s) ; magnetometer, audio and / or other technologies used for positioning) , additional memory modules 1326, a power supply 1330, and / or a camera 1332. The Bluetooth module 1312, the WLAN module 1314, and the SPS module 1316 may include an on-chip transceiver (TRX) (or in some cases, just a receiver (RX) ) . The Bluetooth module 1312, the WLAN module 1314, and the SPS module 1316 may include their own dedicated antennas and / or utilize the antennas 1380 for communication. The cellular baseband processor (s) (or processing circuitry) 1324 communicates through the transceiver (s) 1322 via one or more antennas 1380 with the UE 104 and / or with an RU associated with a network entity 1302. The cellular baseband processor (s) (or processing circuitry) 1324 and the application processor (s) (or processing circuitry) 1306 may each include a computer-readable medium / memory (or memory circuitry) 1324', 1306', respectively. The additional memory modules 1326 may also be considered a computer-readable medium / memory (or memory circuitry) . Each computer-readable medium / memory (or memory circuitry) 1324', 1306', 1326 may be non-transitory. The cellular baseband processor (s) (or processing circuitry) 1324 and the application processor (s) (or processing circuitry) 1306 are each responsible for general processing, including the execution of software stored on the computer-readable medium / memory (or memory circuitry) . The software, when executed by the cellular baseband processor (s) (or processing circuitry) 1324 / application processor (s) (or processing circuitry) 1306, causes the cellular baseband processor (s) (or processing circuitry) 1324 / application processor (s) (or processing circuitry) 1306 to perform the various functions described supra. The cellular baseband processor (s) (or processing circuitry) 1324 and the application processor (s) (or processing circuitry) 1306 are configured to perform the various functions described supra based at least in part of the information stored in the memory (or memory circuitry) . That is, the cellular baseband processor (s) (or processing circuitry) 1324 and the application processor (s) (or processing circuitry) 1306 may be configured to perform a first subset of the various functions described supra without information stored in the memory and may be configured to perform a second subset of the various functions described supra based on the information stored in the memory. The computer-readable medium / memory (or memory circuitry) may also be used for storing data that is manipulated by the cellular baseband processor (s) (or processing circuitry) 1324 / application processor (s) (or processing circuitry) 1306 when executing software. The cellular baseband processor (s) (or processing circuitry) 1324 / application processor (s) (or processing circuitry) 1306 may be a component of the UE 350 and may include the at least one memory 360 and / or at least one of the TX processor 368, the RX processor 356, and the controller / processor 359. In one configuration, the apparatus 1304 may be at least one processor chip (modem and / or application) and include just the cellular baseband processor (s) (or processing circuitry) 1324 and / or the application processor (s) (or processing circuitry) 1306, and in another configuration, the apparatus 1304 may be the entire UE (e.g., see UE 350 of FIG. 3) and include the additional modules of the apparatus 1304.
[0154] As discussed supra, the component 198 may be configured to identify a CSI reference resource for a UE-initiated CSI report; and manage, based on a CSI report mode and the CSI reference resource, the UE-initiated CSI report, where the CSI report mode includes one of a first mode or a second mode, and where the first mode indicates a first PUCCH transmission, and the second mode indicates the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report. The component 198 may be further configured to perform any of the aspects described in connection with the flowcharts in FIG. 9 and FIG. 10, and / or performed by the UE 802 in FIG. 8. The component 198 may be within the cellular baseband processor (s) (or processing circuitry) 1324, the application processor (s) (or processing circuitry) 1306, or both the cellular baseband processor (s) (or processing circuitry) 1324 and the application processor (s) (or processing circuitry) 1306. The component 198 may be one or more hardware components specifically configured to carry out the stated processes / algorithm, implemented by one or more processors configured to perform the stated processes / algorithm, stored within a computer-readable medium for implementation by one or more processors, or some combination thereof. When multiple processors are implemented, the multiple processors may perform the stated processes / algorithm individually or in combination. As shown, the apparatus 1304 may include a variety of components configured for various functions. In one configuration, the apparatus 1304, and in particular the cellular baseband processor (s) (or processing circuitry) 1324 and / or the application processor (s) (or processing circuitry) 1306, includes means for identifying a CSI reference resource for a UE-initiated CSI report, and means for managing, based on a CSI report mode and the CSI reference resource, the UE-initiated CSI report, where the CSI report mode includes one of a first mode or a second mode, and where the first mode indicates a first PUCCH transmission, and the second mode indicates the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report. The apparatus 1304 may further include means for performing any of the aspects described in connection with the flowcharts in FIG. 9 and FIG. 10, and / or aspects performed by the UE 802 in FIG. 8. The means may be the component 198 of the apparatus 1304 configured to perform the functions recited by the means. As described supra, the apparatus 1304 may include the TX processor 368, the RX processor 356, and the controller / processor 359. As such, in one configuration, the means may be the TX processor 368, the RX processor 356, and / or the controller / processor 359 configured to perform the functions recited by the means.
[0155] FIG. 14 is a diagram 1400 illustrating an example of a hardware implementation for a network entity 1402. The network entity 1402 may be a BS, a component of a BS, or may implement BS functionality. The network entity 1402 may include at least one of a CU 1410, a DU 1430, or an RU 1440. For example, depending on the layer functionality handled by the component 199, the network entity 1402 may include the CU 1410; both the CU 1410 and the DU 1430; each of the CU 1410, the DU 1430, and the RU 1440; the DU 1430; both the DU 1430 and the RU 1440; or the RU 1440. The CU 1410 may include at least one CU processor (or processing circuitry) 1412. The CU processor (s) (or processing circuitry) 1412 may include on-chip memory (or memory circuitry) 1412'. In some aspects, the CU 1410 may further include additional memory modules 1414 and a communications interface 1418. The CU 1410 communicates with the DU 1430 through a midhaul link, such as an F1 interface. The DU 1430 may include at least one DU processor (or processing circuitry) 1432. The DU processor (s) (or processing circuitry) 1432 may include on-chip memory (or memory circuitry) 1432'. In some aspects, the DU 1430 may further include additional memory modules 1434 and a communications interface 1438. The DU 1430 communicates with the RU 1440 through a fronthaul link. The RU 1440 may include at least one RU processor (or processing circuitry) 1442. The RU processor (s) (or processing circuitry) 1442 may include on-chip memory (or memory circuitry) 1442'. In some aspects, the RU 1440 may further include additional memory modules 1444, one or more transceivers 1446, antennas 1480, and a communications interface 1448. The RU 1440 communicates with the UE 104. The on-chip memory (or memory circuitry) 1412', 1432', 1442' and the additional memory modules 1414, 1434, 1444 may each be considered a computer-readable medium / memory (or memory circuitry) . Each computer-readable medium / memory (or memory circuitry) may be non-transitory. Each of the processors (or processing circuitry) 1412, 1432, 1442 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory (or memory circuitry) . The software, when executed by the corresponding processor (s) (or processing circuitry) causes the processor (s) (or processing circuitry) to perform the various functions described supra. The computer-readable medium / memory (or memory circuitry) may also be used for storing data that is manipulated by the processor (s) (or processing circuitry) when executing software.
[0156] As discussed supra, the component 199 may be configured to indicate, to a UE, a CSI report mode for a UE-initiated CSI report to be one of a first mode or a second mode, where the first mode indicates a first PUCCH transmission, and the second mode indicates the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report; and receive, from the UE, the UE-initiated CSI report on a CSI reference resource, where the CSI reference resource is based on a first uplink slot carrying the first PUCCH transmission. The component 199 may be further configured to perform any of the aspects described in connection with the flowcharts in FIG. 11 and FIG. 12, and / or performed by the base station 804 in FIG. 8. The component 199 may be within one or more processors (or processing circuitry) of one or more of the CU 1410, DU 1430, and the RU 1440. The component 199 may be one or more hardware components specifically configured to carry out the stated processes / algorithm, implemented by one or more processors configured to perform the stated processes / algorithm, stored within a computer-readable medium for implementation by one or more processors, or some combination thereof. When multiple processors are implemented, the multiple processors may perform the stated processes / algorithm individually or in combination. The network entity 1402 may include a variety of components configured for various functions. In one configuration, the network entity 1402 includes means for indicating, to a UE, a CSI report mode for a UE-initiated CSI report to be one of a first mode or a second mode, where the first mode indicates a first PUCCH transmission, and the second mode indicates the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report, and means for receiving, from the UE, the UE-initiated CSI report on a CSI reference resource, where the CSI reference resource is based on a first uplink slot carrying the first PUCCH transmission. The network entity 1402 may further include means for performing any of the aspects described in connection with the flowcharts in FIG. 11 and FIG. 12, and / or aspects performed by the base station 804 in FIG. 8. The means may be the component 199 of the network entity 1402 configured to perform the functions recited by the means. As described supra, the network entity 1402 may include the TX processor 316, the RX processor 370, and the controller / processor 375. As such, in one configuration, the means may be the TX processor 316, the RX processor 370, and / or the controller / processor 375 configured to perform the functions recited by the means.
[0157] This disclosure provides a method for wireless communication at a UE. The method may include identifying a CSI reference resource for a UE-initiated CSI report; and managing, based on a CSI report mode and the CSI reference resource, the UE-initiated CSI report, where the CSI report mode includes one of a first mode or a second mode, and where the first mode indicates a first PUCCH transmission, and the second mode indicates the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report. By enabling the UE to configure and manage different mode (e.g., Mode A or Mode B) and to define CSI reference resources for UE-initiated CSI reports based on the timing of relevant events for the CSI reports, the methods enhance efficiency and resource utilization in wireless communication. Additionally, by enabling the UE to modify the CSI reporting, such as deferring CSI reports or adjusting measurement schedules based on varying conditions, the methods improve the relevance and effectiveness of the CSI reports, thereby enhancing the overall performance of wireless communication.
[0158] It is understood that the specific order or hierarchy of blocks in the processes / flowcharts disclosed is an illustration of example approaches. Based upon design preferences, it is understood that the specific order or hierarchy of blocks in the processes / flowcharts may be rearranged. Further, some blocks may be combined or omitted. The accompanying method claims present elements of the various blocks in a sample order, and are not limited to the specific order or hierarchy presented.
[0159] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not limited to the aspects described herein, but are to be accorded the full scope consistent with the language claims. Reference to an element in the singular does not mean “one and only one” unless specifically so stated, but rather “one or more. ” Terms such as “if, ” “when, ” and “while” do not imply an immediate temporal relationship or reaction. That is, these phrases, e.g., “when, ” do not imply an immediate action in response to or during the occurrence of an action, but simply imply that if a condition is met then an action will occur, but without requiring a specific or immediate time constraint for the action to occur. The word “exemplary” is used herein to mean “serving as an example, instance, or illustration. ” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects. Unless specifically stated otherwise, the term “some” refers to one or more. Combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” include any combination of A, B, and / or C, and may include multiples of A, multiples of B, or multiples of C. Specifically, combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combinations may contain one or more member or members of A, B, or C. Sets should be interpreted as a set of elements where the elements number one or more. Accordingly, for a set of X, X would include one or more elements. When at least one processor is configured to perform a set of functions, the at least one processor, individually or in any combination, is configured to perform the set of functions. Accordingly, each processor of the at least one processor may be configured to perform a particular subset of the set of functions, where the subset is the full set, a proper subset of the set, or an empty subset of the set. A processor may be referred to as processor circuitry. A memory / memory module may be referred to as memory circuitry. If a first apparatus receives data from or transmits data to a second apparatus, the data may be received / transmitted directly between the first and second apparatuses, or indirectly between the first and second apparatuses through a set of apparatuses. A device configured to “output” data or “provide” data, such as a transmission, signal, or message, may transmit the data, for example with a transceiver, or may send the data to a device that transmits the data. A device configured to “obtain” data, such as a transmission, signal, or message, may receive, for example with a transceiver, or may obtain the data from a device that receives the data. Information stored in a memory includes instructions and / or data. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are encompassed by the claims. Moreover, nothing disclosed herein is dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. The words “module, ” “mechanism, ” “element, ” “device, ” and the like may not be a substitute for the word “means. ” As such, no claim element is to be construed as a means plus function unless the element is expressly recited using the phrase “means for. ”
[0160] As used herein, the phrase “based on” shall not be construed as a reference to a closed set of information, one or more conditions, one or more factors, or the like. In other words, the phrase “based on A” (where “A” may be information, a condition, a factor, or the like) shall be construed as “based at least on A” unless specifically recited differently.
[0161] The following aspects are illustrative only and may be combined with other aspects or teachings described herein, without limitation.
[0162] Aspect 1 is a method of wireless communication at a UE. The method includes identifying a channel state information (CSI) reference resource for a user equipment (UE) initiated CSI report; and managing, based on a CSI report mode and the CSI reference resource, the UE-initiated CSI report, wherein the CSI report mode includes one of a first mode or a second mode, and wherein the first mode indicates a first physical uplink control channel (PUCCH) transmission, and the second mode indicates the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report.
[0163] Aspect 2 is the method of aspect 1, wherein a management of the UE-initiated CSI report is based on the first mode when the UE has received, from a network entity, a first configuration for the first PUCCH transmission and not a second configuration for the CSI uplink slot for the UE-initiated CSI report, and wherein the management of the UE-initiated CSI report is based on the second mode when the UE has received, from the network entity, the first configuration for the first PUCCH transmission and the second configuration for the CSI uplink slot for the UE-initiated CSI report.
[0164] Aspect 3 is the method of aspect 1, where the method further includes receiving, from a network entity, a mode identifier indicating one of the first mode or the second mode, wherein management of the CSI report is based on the mode identifier, wherein the mode identifier is comprised in one or more of radio resource control (RRC) signaling, a medium access control-control element (MAC-CE) , or downlink control information (DCI) .
[0165] Aspect 4 is the method of aspect 1, where the method further includes receiving, from a network entity, multiple candidate configurations each corresponding to one or more of a first configuration for the first PUCCH transmission or a second configuration for the CSI uplink slot for the UE-initiated CSI report; and receiving a lower layer signaling indicating one candidate configuration of the multiple configurations, wherein management of the CSI report is based on the one candidate configuration of the multiple candidate configurations, and wherein the multiple candidate configurations and the lower layer signaling are provided in a medium access control (MAC) –control element (MAC-CE) or downlink control information (DCI) .
[0166] Aspect 5 is the method of any of aspects 1 to 4, wherein identifying the CSI reference resource for the UE-initiated CSI report includes identifying, based on a first uplink slot carrying the first PUCCH transmission, the CSI reference resource for the UE-initiated CSI report.
[0167] Aspect 6 is the method of aspect 5, wherein the CSI reference resource is based on the first uplink slot carrying the first PUCCH transmission and a first time gap, wherein the first time gap is based on one or more of: an event type of an event triggering the UE-initiated CSI report, or the number of reference signals for measurement for the UE-initiated CSI report.
[0168] Aspect 7 is the method of any of aspects 1 to 6, wherein the CSI report mode includes the second mode, and wherein identifying the CSI reference resource for the UE-initiated CSI report includes determining, based on the CSI uplink slot for the UE-initiated CSI report, a tentative CSI reference resource; determining a time interval between a first uplink slot for the first PUCCH transmission and the tentative CSI reference resource; and identifying, based on a comparison of the time interval and an interval threshold, the CSI reference resource for the UE-initiated CSI report.
[0169] Aspect 8 is the method of aspect 7, where the method further includes obtaining the interval threshold based on a pre-defined number or from radio resource control (RRC) signaling.
[0170] Aspect 9 is the method of any of aspects 7 to 8, wherein identifying the CSI reference resource for the UE-initiated CSI report includes setting, in response to the time interval being greater than or equal to the interval threshold, the tentative CSI reference resource to be the CSI reference resource, and wherein managing the UE-initiated CSI report includes performing, based on the CSI reference resource, measurements for the UE-initiated CSI report; transmitting, to a network entity, the first PUCCH transmission; and transmitting, to the network entity, the UE-initiated CSI report.
[0171] Aspect 10 is the method of any of aspects 7 to 8, wherein identifying the CSI reference resource for the UE-initiated CSI report includes setting, in response to the time interval being less than the interval threshold, the tentative CSI reference resource to be the CSI reference resource, and wherein managing the UE-initiated CSI report includes performing, based on the CSI reference resource, measurements for the UE-initiated CSI report; and skipping the first PUCCH transmission.
[0172] Aspect 11 is the method of aspect 10, wherein managing the UE-initiated CSI report includes skipping the UE-initiated CSI report, wherein a CSI processing unit (CPU) for the UE-initiated CSI report is occupied until the first uplink slot for the first PUCCH transmission.
[0173] Aspect 12 is the method of aspect 11, where the method further includes transmitting a second UE-initiated CSI report at a subsequent uplink slot following the CSI uplink slot, wherein the second UE-initiated CSI report includes the measurements for the UE-initiated CSI report.
[0174] Aspect 13 is the method of aspect 10, wherein managing the UE-initiated CSI report includes transmitting, in response to a blind detection capability of a network entity without the first PUCCH transmission, the UE-initiated CSI report, wherein a CSI processing unit (CPU) for the UE-initiated CSI report is occupied until the CSI uplink slot for the UE-initiated CSI report.
[0175] Aspect 14 is the method of aspect 13, where the method further includes receiving, from the network entity, via a radio resource control (RRC) message, a capability indication for the blind detection capability without the first PUCCH transmission.
[0176] Aspect 15 is the method of aspect 7, wherein the time interval is less than the interval threshold, and wherein managing the UE-initiated CSI report includes skipping measurements for the UE-initiated CSI report; skipping the first PUCCH transmission; and skipping the UE-initiated CSI report.
[0177] Aspect 16 is the method of any of aspects 1 to 15, wherein the CSI reference resource includes a first CSI reference resource and a second CSI reference resource, wherein the first CSI reference resource is for evaluating an event condition for the UE-initiated CSI report, and the second CSI reference resource is for measurements and reporting of the UE-initiated CSI report.
[0178] Aspect 17 is the method of aspect 16, wherein the first CSI reference resource is based on a first uplink slot for the first PUCCH transmission, and the second CSI reference resource is based on a second uplink slot for the UE-initiated CSI report, wherein a first CSI processing unit (CPU) corresponding to the first CSI reference resource is occupied until the first uplink slot for first PUCCH transmission, and a second CPU corresponding to the second CSI reference resource is occupied until the second uplink slot for the UE-initiated CSI report.
[0179] Aspect 18 is the method of aspect 17, wherein a combined CPU occupation during an overlapping duration when the first CPU and the second CPU are occupied is one of: the sum of the first CPU and the second CPU, or the larger of the first CPU or the second CPU.
[0180] Aspect 19 is an apparatus for wireless communication at a UE, comprising: a processing system that includes processor circuitry and memory circuitry that stores code and is coupled with the processor circuitry, the processing system configured to cause the UE to perform the method of one or more of aspects 1-18.
[0181] Aspect 20 is an apparatus for wireless communication at a UE, comprising: at least one memory; and at least one processor coupled to the at least one memory and, where the at least one processor, individually or in any combination, is configured to perform the method of any of aspects 1-18.
[0182] Aspect 21 is the apparatus for wireless communication at a UE, comprising means for performing each step in the method of any of aspects 1-18.
[0183] Aspect 22 is an apparatus of any of aspects 19-21, further comprising a transceiver configured to receive or to transmit in association with the method of any of aspects 1-18.
[0184] Aspect 23 is a computer-readable medium (e.g., a non-transitory computer-readable medium) storing computer executable code at a UE, the code when executed by at least one processor causes the at least one processor to, individually or in any combination, perform the method of any of aspects 1-18.
[0185] Aspect 24 is a method of wireless communication at a network entity. The method includes indicating, to a user equipment (UE) , a channel state information (CSI) report mode for a UE-initiated CSI report to be one of a first mode or a second mode, wherein the first mode indicates a first physical uplink control channel (PUCCH) transmission, and the second mode indicates the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report; and receiving, from the UE, the UE-initiated CSI report on a CSI reference resource, wherein the CSI reference resource is based on a first uplink slot carrying the first PUCCH transmission.
[0186] Aspect 25 is the method of aspect 24, wherein indicating the CSI report mode for the UE-initiated CSI report includes indicating the CSI report mode based on a first configuration for the first PUCCH transmission and a second configuration for the CSI uplink slot for the UE-initiated CSI report, wherein a presence of the first configuration and an absence of the second configuration indicates the first mode, and the presence of the first configuration and a presence of the second configuration indicate the second mode.
[0187] Aspect 26 is the method of aspect 24, wherein indicating the CSI report mode for the UE-initiated CSI report includes transmitting, to the UE, a mode identifier indicating one of the first mode or the second mode, wherein the mode identifier is comprised in one or more of radio resource control (RRC) signaling, a medium access control-control element (MAC-CE) , or downlink control information (DCI) .
[0188] Aspect 27 is the method of aspect 24, where the method further includes transmitting, to a UE, multiple candidate configurations each corresponding to one or more of a first configuration for the first PUCCH transmission or a second configuration for the CSI uplink slot for the UE-initiated CSI report; and transmitting a lower layer signaling indicating one candidate configuration of the multiple configurations, wherein the CSI report mode is based on the one candidate configuration of the multiple candidate configurations, wherein the multiple candidate configurations and the lower layer signaling are provided in a medium access control (MAC) –control element (MAC-CE) or downlink control information (DCI) .
[0189] Aspect 28 is an apparatus for wireless communication at a network entity, comprising: a processing system that includes processor circuitry and memory circuitry that stores code and is coupled with the processor circuitry, the processing system configured to cause the network entity to perform the method of one or more of aspects 24-27.
[0190] Aspect 29 is an apparatus for wireless communication at a network entity, comprising: at least one memory; and at least one processor coupled to the at least one memory and, where the at least one processor, individually or in any combination, is configured to perform the method of any of aspects 24-27.
[0191] Aspect 30 is the apparatus for wireless communication at a network entity, comprising means for performing each step in the method of any of aspects 24-27.
[0192] Aspect 31 is an apparatus of any of aspects 28-30, further comprising a transceiver configured to receive or to transmit in association with the method of any of aspects 24-27.
[0193] Aspect 32 is a computer-readable medium (e.g., a non-transitory computer-readable medium) storing computer executable code at a network entity, the code when executed by at least one processor causes the at least one processor to, individually or in any combination, perform the method of any of aspects 24-27.
Claims
1.An apparatus for wireless communication at a user equipment (UE) , comprising:at least one memory; andat least one processor coupled to the at least one memory and, based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, is configured to cause the UE to:identify a channel state information (CSI) reference resource for a UE-initiated CSI report; andmanage, based on a CSI report mode and the CSI reference resource, the UE-initiated CSI report, wherein the CSI report mode includes one of a first mode or a second mode, and wherein the first mode indicates a first physical uplink control channel (PUCCH) transmission, and the second mode indicates the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report.2.The apparatus of claim 1, further comprising a transceiver coupled to the at least one processor, wherein to manage the UE-initiated CSI report, the at least one processor, individually or in any combination, is configured to manage the UE-initiated CSI report via the transceiver, andwherein a management of the UE-initiated CSI report is based on the first mode when the UE has received, from a network entity, a first configuration for the first PUCCH transmission and not a second configuration for the CSI uplink slot for the UE-initiated CSI report, andwherein the management of the UE-initiated CSI report is based on the second mode when the UE has received, from the network entity, the first configuration for the first PUCCH transmission and the second configuration for the CSI uplink slot for the UE-initiated CSI report.3.The apparatus of claim 1, wherein the at least one processor, individually or in any combination, is configured to cause the UE to:receive, from a network entity, a mode identifier indicating one of the first mode or the second mode, wherein management of the CSI report is based on the mode identifier, wherein the mode identifier is comprised in one or more of radio resource control (RRC) signaling, a medium access control-control element (MAC-CE) , or downlink control information (DCI) .4.The apparatus of claim 1, wherein the at least one processor, individually or in any combination, is configured to cause the UE to:receive, from a network entity, multiple candidate configurations each corresponding to one or more of a first configuration for the first PUCCH transmission or a second configuration for the CSI uplink slot for the UE-initiated CSI report; andreceive a lower layer signaling indicating one candidate configuration of the multiple configurations, wherein management of the CSI report is based on the one candidate configuration of the multiple candidate configurations, and wherein the multiple candidate configurations and the lower layer signaling are provided in a medium access control (MAC) –control element (MAC-CE) or downlink control information (DCI) .5.The apparatus of claim 1, wherein to identify the CSI reference resource for the UE-initiated CSI report, the at least one processor, individually or in any combination, is configured to cause the UE to:identify, based on a first uplink slot carrying the first PUCCH transmission, the CSI reference resource for the UE-initiated CSI report.6.The apparatus of claim 5, wherein the CSI reference resource is based on the first uplink slot carrying the first PUCCH transmission and a first time gap, wherein the first time gap is based on one or more of:an event type of an event triggering the UE-initiated CSI report, ora number of reference signals for measurement for the UE-initiated CSI report.7.The apparatus of claim 1, wherein the CSI report mode includes the second mode, and wherein to identify the CSI reference resource for the UE-initiated CSI report, the at least one processor, individually or in any combination, is configured to cause the UE to:determine, based on the CSI uplink slot for the UE-initiated CSI report, a tentative CSI reference resource;determine a time interval between a first uplink slot for the first PUCCH transmission and the tentative CSI reference resource; andidentify, based on a comparison of the time interval and an interval threshold, the CSI reference resource for the UE-initiated CSI report.8.The apparatus of claim 7, wherein the at least one processor, individually or in any combination, is further configured to cause the UE to:obtain the interval threshold based on a pre-defined number or from radio resource control (RRC) signaling.9.The apparatus of claim 7, wherein to identify the CSI reference resource for the UE-initiated CSI report, the at least one processor, individually or in any combination, is configured to cause the UE to:set, in response to the time interval being greater than or equal to the interval threshold, the tentative CSI reference resource to be the CSI reference resource, and wherein to manage the UE-initiated CSI report, the at least one processor, individually or in any combination, is configured to cause the UE to:perform, based on the CSI reference resource, measurements for the UE-initiated CSI report;transmit, to a network entity, the first PUCCH transmission; andtransmit, to the network entity, the UE-initiated CSI report.10.The apparatus of claim 7, wherein to identify the CSI reference resource for the UE-initiated CSI report, the at least one processor, individually or in any combination, is configured to cause the UE to:set, in response to the time interval being less than the interval threshold, the tentative CSI reference resource to be the CSI reference resource, and wherein to manage the UE-initiated CSI report, the at least one processor, individually or in any combination, is configured to cause the UE to:perform, based on the CSI reference resource, measurements for the UE-initiated CSI report; andskip the first PUCCH transmission.11.The apparatus of claim 10, wherein to manage the UE-initiated CSI report, the at least one processor, individually or in any combination, is further configured to cause the UE to:skip the UE-initiated CSI report, wherein a CSI processing unit (CPU) for the UE-initiated CSI report is occupied until the first uplink slot for the first PUCCH transmission.12.The apparatus of claim 11, wherein the at least one processor, individually or in any combination, is further configured to cause the UE to:transmit a second UE-initiated CSI report at a subsequent uplink slot following the CSI uplink slot, wherein the second UE-initiated CSI report includes the measurements for the UE-initiated CSI report.13.The apparatus of claim 10, wherein to manage the UE-initiated CSI report, the at least one processor, individually or in any combination, is further configured to cause the UE to:transmit, in response to a blind detection capability of a network entity without the first PUCCH transmission, the UE-initiated CSI report, wherein a CSI processing unit (CPU) for the UE-initiated CSI report is occupied until the CSI uplink slot for the UE-initiated CSI report.14.The apparatus of claim 13, wherein the at least one processor, individually or in any combination, is further configured to cause the UE to:receive, from the network entity, via a radio resource control (RRC) message, a capability indication for the blind detection capability without the first PUCCH transmission.15.The apparatus of claim 7, wherein the time interval is less than the interval threshold, and wherein to manage the UE-initiated CSI report, the at least one processor, individually or in any combination, is configured to cause the UE to:skip measurements for the UE-initiated CSI report;skip the first PUCCH transmission; andskip the UE-initiated CSI report.16.The apparatus of claim 1, wherein the CSI reference resource includes a first CSI reference resource and a second CSI reference resource, wherein the first CSI reference resource is for evaluating an event condition for the UE-initiated CSI report, and the second CSI reference resource is for measurements and reporting of the UE-initiated CSI report.17.The apparatus of claim 16, wherein the first CSI reference resource is based on a first uplink slot for the first PUCCH transmission, and the second CSI reference resource is based on a second uplink slot for the UE-initiated CSI report, wherein a first CSI processing unit (CPU) corresponding to the first CSI reference resource is occupied until the first uplink slot for first PUCCH transmission, and a second CPU corresponding to the second CSI reference resource is occupied until the second uplink slot for the UE-initiated CSI report.18.The apparatus of claim 17, wherein a combined CPU occupation during an overlapping duration when the first CPU and the second CPU are occupied is one of:a sum of the first CPU and the second CPU, ora larger of the first CPU or the second CPU.19.A method of wireless communication at a user equipment (UE) , comprising:identifying a channel state information (CSI) reference resource for a UE-initiated CSI report; andmanaging, based on a CSI report mode and the CSI reference resource, the UE-initiated CSI report, wherein the CSI report mode includes one of a first mode or a second mode, wherein the first mode indicates a first physical uplink control channel (PUCCH) transmission, and the second mode indicates the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report.20.An apparatus for wireless communication at a network entity, comprising:at least one memory; andat least one processor coupled to the at least one memory and, based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, is configured to cause the network entity to:indicate, to a user equipment (UE) , a channel state information (CSI) report mode for a UE-initiated CSI report to be one of a first mode or a second mode, wherein the first mode indicates a first physical uplink control channel (PUCCH) transmission, and the second mode indicates the first PUCCH transmission and a CSI uplink slot for the UE-initiated CSI report; andreceive, from the UE, the UE-initiated CSI report on a CSI reference resource, wherein the CSI reference resource is based on a first uplink slot carrying the first PUCCH transmission.
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