WO2025209387A1

WO2025209387A1 - Ordering rules and bit-widths for fields in multiple time domain occasion layer 1 report

Info

Publication number: WO2025209387A1
Application number: PCT/CN2025/086120
Authority: WO
Inventors: Qiaoyu Li; Mahmoud Taherzadeh Boroujeni; Hamed Pezeshki
Original assignee: Qualcomm Inc
Current assignee: Qualcomm Inc
Priority date: 2024-04-03
Filing date: 2025-03-31
Publication date: 2025-10-09
Anticipated expiration: 2026-10-03
Also published as: WO2025208410A1

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may obtain data indicating Layer 1 (L1) channel characteristics associated with a set of candidate resources across multiple temporal occasions. The UE may transmit a channel state information (CSI) report that indicates the L1 channel characteristics for one or more resources, of the set of candidate resources, in one or more of the multiple temporal occasions, wherein the CSI report includes a set of fields with bit-widths based on a number of the multiple temporal occasions and a mapping order based on temporal occasion identifiers associated with the set of fields. Numerous other aspects are described.

Description

ORDERING RULES AND BIT-WIDTHS FOR FIELDS IN MULTIPLE TIME DOMAIN OCCASION LAYER 1 REPORT

CROSS-REFERENCE TO RELATED APPLICATION

This Patent Application claims priority to Patent Cooperation Treaty (PCT) Application No. PCT/CN2024/085796, filed on April 3, 2024, entitled “ORDERING RULES AND BIT-WIDTHS FOR FIELDS IN MULTIPLE TIME DOMAIN OCCASION LAYER 1 REPORT, ” and assigned to the assignee hereof. The disclosure of the prior Application is considered part of and is incorporated by reference in this Patent Application.
FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wireless communication and specifically relate to techniques, apparatuses, and methods associated with ordering rules and bit-widths for fields in a multiple time domain occasion Layer 1 report.
DESCRIPTION OF THE RELATED TECHNOLOGY

Wireless communication systems are widely deployed to provide various services, which may involve carrying or supporting voice, text, other messaging, video, data, or other traffic. Typical wireless communication systems may employ multiple-access radio access technologies (RATs) capable of supporting communication among multiple wireless communication devices including user devices or other devices by sharing the available system resources (for example, time domain resources, frequency domain resources, spatial domain resources, or device transmit power, among other examples) . Such multiple-access RATs are supported by technological advancements that have been adopted in various telecommunication standards, which define common protocols that enable different wireless communication devices to communicate on a local, municipal, national, regional, or global level. An example telecommunication standard is New Radio (NR) . NR, which also may be referred to as 5G, is part of a continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) . As the demand for connectivity continues to increase, further improvements in NR may be implemented, and other RATs, such as 6G and beyond, may be introduced to enable new applications and facilitate new use cases.

In a wireless network, a user equipment (UE) and a network node may communicate to perform beam management. For example, in some cases, beam management may include beam selection procedures, initial beam acquisition procedures, beam sweeping procedures, cell search procedures, and/or beam search procedures in which the network node performs beam sweeping over multiple transmit (Tx) beams (e.g., transmitting a synchronization signal block (SSB) or channel state information (CSI) reference signal (CSI-RS) using multiple transmit beams) . Additionally, or alternatively, the beam management procedures may include beam refinement procedures, network node beam refinement procedures, transmission reception point (TRP) beam refinement procedures, and/or transmit beam refinement procedures in which the network node performs beam sweeping over one or more transmit beams, and the UE measures each beam using a single (e.g., a same) receive beam. Additionally, or alternatively, the beam management procedures may include beam refinement procedures, beam failure detection procedures, beam failure recovery procedures, UE beam refinement procedures, and/or receive beam refinement procedures in which the network node transmits one or more downlink signals using a single transmit beam, and the UE sweeps through one or more receive beams in multiple transmission instances to select a best receive beam based at least in part on measurements reported by the UE.

SUMMARY

The systems, methods, and devices of this disclosure each have several innovative aspects, no single one of which is solely responsible for the desirable attributes disclosed herein.

Some aspects described herein relate to an apparatus for wireless communication at a user equipment (UE) . The apparatus may include a processing system that includes one or more processors and one or more code-storing memories coupled with the one or more processors. The processing system may be configured to cause the apparatus to obtain data indicating Layer 1 (L1) channel characteristics associated with a set of candidate resources across multiple temporal occasions. The one or more processors, individually or in any combination, may be operable to cause the apparatus to transmit a channel state information (CSI) report that indicates the L1 channel characteristics for one or more resources, of the set of candidate resources, in one or more of the multiple temporal occasions, wherein the CSI report includes a set of fields with bit-widths based on a number of the multiple temporal occasions and a mapping order based on temporal occasion identifiers associated with the set of fields.

Some aspects described herein relate to a method of wireless communication performed by a UE. The method may include obtaining data indicating L1 channel characteristics associated with a set of candidate resources across multiple temporal occasions. The method may include transmitting a CSI report that indicates the L1 channel characteristics for one or more resources, of the set of candidate resources, in one or more of the multiple temporal occasions, wherein the CSI report includes a set of fields with bit-widths based on a number of the multiple temporal occasions and a mapping order based on temporal occasion identifiers associated with the set of fields.

Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for obtaining data indicating L1 channel characteristics associated with a set of candidate resources across multiple temporal occasions. The apparatus may include means for transmitting a CSI report that indicates the L1 channel characteristics for one or more resources, of the set of candidate resources, in one or more of the multiple temporal occasions, wherein the CSI report includes a set of fields with bit-widths based on a number of the multiple temporal occasions and a mapping order based on temporal occasion identifiers associated with the set of fields.

Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a UE. The set of instructions, when executed by one or more processors of the UE, may cause the UE to obtain data indicating L1 channel characteristics associated with a set of candidate resources across multiple temporal occasions. The set of instructions, when executed by one or more processors of the UE, may cause the UE to transmit a CSI report that indicates the L1 channel characteristics for one or more resources, of the set of candidate resources, in one or more of the multiple temporal occasions, wherein the CSI report includes a set of fields with bit-widths based on a number of the multiple temporal occasions and a mapping order based on temporal occasion identifiers associated with the set of fields.

Aspects of the present disclosure may generally be implemented by or as a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, network node, wireless communication device, or processing system as substantially described in the Detailed Description with reference to, and as illustrated by, the accompanying drawings. Details of one or more implementations of the subject matter described in this disclosure are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages will become apparent from the description, the drawings, and the claims. Note that the relative dimensions of the following figures may not be drawn to scale.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a diagram illustrating an example of a wireless communication network.

Fig. 2 is a diagram illustrating an example of artificial intelligence or machine learning based beam management and an example of a Layer 1 (L1) report associated with multiple time domain occasions.

Figs. 3A-3D are diagrams illustrating examples associated with ordering rules and bit-widths for fields in a multiple time domain occasion L1 report.

Fig. 4 is a diagram illustrating an example process performed, for example, at a UE or an apparatus of a UE.

Fig. 5 is a diagram of an example apparatus for wireless communication.

DETAILED DESCRIPTION

In some cases, advances in technology have enabled development of beam management techniques based on artificial intelligence (AI) and/or machine learning (ML) techniques. For example, a network node may transmit one or more signals to a UE using a first set of beams, and the UE may perform measurements for the first set of beams to obtain a first set of measurements. For example, each beam, from the first set of beams, may be associated with one or more measurements performed by the UE, which may be input into an artificial intelligence or machine learning (AI/ML) model along with information associated with the first set of beams, such as a beam direction (e.g., spatial direction) , beam width, beam shape, and/or other characteristics of the respective beams from the first set of beams. The AI/ML model may then output one or more predictions, such as predicted measurement values associated with the second set of beams, which may reduce a quantity of beam measurements that are performed by the UE, thereby conserving power of the UE and/or network resources that would have otherwise been used to measure all beams included in the first set of beams and the second set of beams. Additionally, or alternatively, an output of the AI/ML model may include a point-direction, an angle of departure (AoD) , and/or an angle of arrival (AoA) of a beam included in a second set of beams.

In some cases, including beam measurements for multiple temporal occasions or multiple time domain occasions in one CSI reporting instance may assist with high performance beam management. For example, a CSI report may include a common CSI-RS resource indicator (CRI) and/or SSB resource indicator (SSBRI) for multiple temporal occasions and a separate Layer 1 (L1) measurement for each respective temporal occasion. In addition, a uplink control information (UCI) payload size may be reduced if a common CRI/SSBRI for multiple temporal occasions is supported. Additionally, or alternatively, a UCI payload size may be reduced by absolutely quantizing and differentially quantizing L1 measurements related to resources or beams addressed in different temporal occasions. Furthermore, a CSI report associated with multiple temporal occasions may generally enable a UE to report historical L1 channel characteristics associated with one or more resources in multiple historical temporal occasions, predicted L1 channel characteristics associated with one or more resources in multiple future temporal occasions, and/or a combination of historical L1 channel characteristics associated with one or more resources in one or more historical temporal occasions and predicted L1 channel characteristics associated with one or more resources in one or more future temporal occasions (e.g., the multiple temporal occasions addressed in a single CSI report may include any combination of historical and/or predicted L1 characteristics for historical and/or future temporal occasions) . Accordingly, by improving L1 beam reporting mechanisms to cover multiple occasions in a time domain, the performance of temporal beam management may be improved.

However, when a CSI report configuration enables a UE to report historical (e.g., measured) and/or predicted L1 channel characteristics associated with multiple temporal occasions, existing beam management and CSI reporting techniques do not specify a mapping order and/or bit-widths for CSI fields that span multiple temporal occasions. For example, to the extent that existing beam management and CSI reporting techniques specify bit-widths for a CRI field, an SSBRI field, a reference signal received power (RSRP) field, and/or a differential RSRP field, the specified bit-widths assume that the CRI field, SSBRI field, RSRP field, and/or differential RSRP field are carried in a CSI report for a single temporal occasion. As a result, the specified bit-widths are unsuitable for a CSI report that may indicate L1 channel characteristics for different temporal occasions. Furthermore, to the extent that existing beam management and CSI reporting techniques specify mapping orders applicable to CSI fields in a CSI report that indicates L1 channel characteristics for multiple CRIs, SSBRIs, or other resources, the specified mapping orders similarly assume that the CSI report is for a single temporal occasion. However, in order to successfully decode an uplink communication that carries a CSI report associated with multiple temporal occasions at a network node, a bit-width needs to be defined per field (e.g., fields indicating channel measurement resource (CMR) identifiers, temporal occasion identifiers, and/or L1-RSRP values, among other examples) . In addition, a mapping order needs to be defined for fields included in a CSI report that addresses multiple temporal occasions to enable successful decoding.

Various aspects relate generally to ordering rules and bit-widths for fields in an L1 report, such as a CSI report indicating L1 channel characteristics, associated with multiple time domain or temporal occasions. Some aspects more specifically relate to a network node configuring a UE to report feedback (e.g., in a CSI report) related to measured and/or predicted L1 channel characteristics for one or more channel measurement and/or prediction resources across multiple temporal occasions, with the UE determining mapping orders and bit-widths associated with one or more fields included in a CSI payload based at least in part on a number of temporal occasions associated with the CSI report. For example, in some aspects, the CSI report configuration may enable the UE to select a specific number of L1 channel characteristics to be addressed in a CSI report, and one or more fields that indicate the measurement and/or prediction resources and corresponding temporal occasions may have a bit-width that is based on a number of candidate measurement/prediction resources and a number of candidate temporal occasions associated with the CSI report. Additionally, or alternatively, the CSI report configuration may indicate a number of L1 channel characteristics to be reported in each of multiple temporal occasions, and a mapping order may be defined for a first set of fields that indicate which resource and temporal occasion pairs are reported and a second set of fields that indicate the corresponding L1 channel characteristics.

In some aspects, the first set of fields and the second set of fields may include one or more reference fields, which may be determined according to a single “best” or “reference” L1 channel characteristic (e.g., a highest L1-RSRP among all reported values) , and the mapping order for remaining fields may be determined relative to the reference field in each set of fields. For example, the one or more reference fields may include a first reference field that jointly indicates the resource and temporal occasion pair associated with the reference L1 channel characteristic and a second reference field that indicates the reference L1 channel characteristic. In another example, the one or more reference fields may include a first reference field that indicates the resource associated with the reference L1 channel characteristic, a second reference field that indicates the temporal occasion associated with the reference L1 channel characteristic, and a third reference field that indicates the reference L1 channel characteristic. Additionally, or alternatively, each temporal occasion may have a respective reference field, and the mapping order for remaining fields associated may be determined according to the respective reference fields associated with the same temporal occasion.

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 defining the bit-widths and ordering of fields in a CSI report associated with multiple candidate temporal occasions, the described techniques can be used to enable a network node to successfully decode a CSI payload that carries the CSI report. Furthermore, by enabling a network node to successfully decode a CSI payload that may indicate measured and/or predicted L1 channel characteristics, the described techniques may enable advanced beam management by tracking channel conditions over time and/or enabling beam management decisions based on predicted channel quality in future temporal occasions. In addition, by defining the mapping order for CSI fields associated with different temporal occasions, one or more resource and temporal identifier pairs and/or corresponding L1 channel characteristics may be indicated or derived based on values of other CSI fields, which may enable bit-widths of certain CSI fields to be reduced and thereby reduce a payload size for the CSI report.

5G New Radio (NR) may support enhanced mobile broadband (eMBB) access, Internet of Things (IoT) networks or reduced capability (RedCap) device deployments, ultra-reliable low-latency communication (URLLC) applications, or massive machine-type communication (mMTC) , among other examples. To support these and other target verticals, a wireless communication system may be designed to implement a modularized functional infrastructure, a disaggregated and service-based network architecture, network function virtualization, network slicing, multi-access edge computing, millimeter wave (mmWave) technologies including massive multiple-input multiple-output (MIMO) , beamforming, IoT device or RedCap device connectivity and management, industrial connectivity, licensed and unlicensed spectrum access, sidelink and other device-to-device direct communication (for example, cellular vehicle-to-everything (CV2X) communication) , frequency spectrum expansion, overlapping spectrum use, small cell deployments, non-terrestrial network (NTN) deployments, device aggregation, advanced duplex communication (for example, sub-band full-duplex (SBFD) ) , multiple-subscriber implementations, high-precision positioning, radio frequency (RF) sensing, network energy savings (NES) , low-power signaling and radios, or artificial intelligence or machine learning (AI/ML) , among other examples.

The foregoing and other technological improvements may support use cases, such as wireless fronthauls, wireless midhauls, wireless backhauls, wireless data centers, extended reality (XR) and metaverse applications, meta services for supporting vehicle connectivity, holographic and mixed reality communication, autonomous and collaborative robots, vehicle platooning and cooperative maneuvering, sensing networks, gesture monitoring, human-brain interfacing, digital twin applications, asset management, and universal coverage applications using non-terrestrial or aerial platforms, among other examples.

The methods, operations, apparatuses, and techniques described herein may enable one or more of the foregoing technologies or new technologies or support one or more of the foregoing use cases or new use cases.

Fig. 1 is a diagram illustrating an example of a wireless communication network 100. The wireless communication network 100 may be or may include elements of a 5G network or a 6G network, among other examples. The wireless communication network 100 may include multiple network nodes 110. For example, in Fig. 1, the wireless communication network 100 includes multiple network nodes 110, including a network node 110a and a network node 110b (each of which also may be referred to herein simply as a “network node 110” ) . The network nodes 110 may support communications with multiple UEs 120. For example, in Fig. 1, the network nodes 110 support communication with a UE 120a, a UE 120b, and a UE 120c (each of which also may be referred to herein simply as a “UE 120” ) . In some examples, a UE 120 also may communicate with other UEs 120 and a network node 110 also may communicate with a core network and with other network nodes 110.

The network nodes 110 and the UEs 120 of the wireless communication network 100 communicate using the electromagnetic spectrum, which may be subdivided into various licensed or unlicensed operating bands, frequency ranges, component carriers, or channels that define associated frequencies available for communications. In some examples, each of the network nodes 110 and the UEs 120 may communicate using one or multiple component carriers in one or more operating bands or ranges. Typically, various operating bands are defined as frequency range designations FR1 (410 MHz through 7.125 GHz) , FR2 (24.25 GHz through 52.6 GHz) , FR3 (7.125 GHz through 24.25 GHz) , FR4a or FR4-1 (52.6 GHz through 71 GHz) , FR4 (52.6 GHz through 114.25 GHz) , and FR5 (114.25 GHz through 300 GHz) . Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “sub-6 GHz” band in some documents and articles. Similarly, FR2 is often referred to (interchangeably) as a “millimeter wave” band in some documents and articles.

A network node 110 or a UE 120 may include one or more devices, components, or systems that enable communication with other devices, components, or systems of the wireless communication network 100. For example, a UE 120 and a network node 110 may each include one or more chips, system-on-chips (SoCs) , chipsets, packages, or devices that individually or collectively constitute or comprise a processing system. As shown in Fig. 1, each UE 120 includes a processing system 140 and each network node 110 includes a processing system 145. A processing system (for example, the processing system 140 or the processing system 145) includes processor (or “processing” ) circuitry in the form of one or multiple processors, microprocessors, processing units (such as central processing units (CPUs) , graphics processing units (GPUs) , neural processing units (NPUs) (also referred to as neural network processors or deep learning processors (DLPs) ) , or digital signal processors (DSPs) ) , processing blocks, application-specific integrated circuits (ASICs) , programmable logic devices (PLDs) , or other discrete gate or transistor logic or circuitry (any one or more of which may be generally referred to herein individually as a “processor” or collectively as “the processor” or “the processor circuitry” ) . Such processors may be individually or collectively configurable or configured to perform various functions or operations described herein. A group of processors collectively configurable or configured to perform a set of functions may include a first processor configurable or configured to perform a first function of the set and a second processor configurable or configured to perform a second function of the set. In some other examples, each of a group of processors may be configurable or configured to perform a same set of functions.

The processing system 140 and the processing system 145 may each include memory circuitry in the form of one or multiple memory devices, memory blocks, memory elements, or other discrete gate or transistor logic or circuitry, each of which may include or implement tangible storage media, such as random-access memory, or read-only memory, or combinations thereof (any one or more of which may be generally referred to herein individually as a “memory” or collectively as “the memory” or “the memory circuitry” ) . One or more of the memories may be coupled (for example, operatively coupled, communicatively coupled, electronically coupled, or electrically coupled) with one or more of the processors. One or more of the memories may individually or collectively store processor-executable code or instructions (such as software) (for example, which may be referred to as “one or more code-storing memories” or “code-storing memory circuitry” ) . For example, “code-storing memory” or “code-storing memory circuitry” refers to memory (or memory circuitry) that is configured to store processor-executable code or instructions. The processor-executable code or instructions, when executed by one or more of the processors, may configure one or more of the processors (or processing circuitry) to perform various functions or operations described herein. Additionally, or alternatively, in some examples, one or more of the processors may be configured to perform various functions or operations described herein without requiring configuration by software. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

The processing system 140 and the processing system 145 may each include or be coupled with one or more modems (such as a cellular (for example, a 5G or 6G compliant) modem) . In some examples, one or more processors of the processing system 140 or the processing system 145 may include or implement one or more of the modems. The processing system 140 and the processing system 145 also may include or be coupled with multiple radios (collectively “the radio” ) , multiple RF chains, or multiple transceivers, each of which may in turn be coupled with one or more of multiple antennas. In some examples, one or more processors of the processing system 140 or the processing system 145 may include or implement one or more of the radios, RF chains, or transceivers. An RF chain may include one or more filters, mixers, oscillators, amplifiers, analog-to-digital converters (ADCs) , or other devices that convert between an analog signal (such as for transmission or reception via an air interface) and a digital signal (such as for processing by the processing system 140 or by the processing system 145) .

A network node 110 and a UE 120 may each include one or multiple antennas or antenna arrays. Typical network nodes 110 and UEs 120 may include multiple antennas, which may be organized or structured into one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, among other examples. As used herein, the term “antenna” can refer to one or more antennas, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays. The term “antenna panel” can refer to a group of antennas (such as antenna elements) arranged in an array or panel, which may facilitate beamforming by manipulating parameters associated with the group of antennas. The term “antenna module” may refer to circuitry including one or more antennas as well as one or more other components (such as filters, amplifiers, or processors) associated with integrating the antenna module into a wireless communication device, such as the network node 110 and the UE 120.

A network node 110 may be, may include, or also may be referred to as an NR network node, a 5G network node, a 6G network node, a Node B, a gNB, an access point (AP) , a transmission reception point (TRP) , a network entity, a network element, a network equipment, or another type of device, component, or system included in a radio access network (RAN) . In various deployments, a network node 110 may be implemented as a single physical node (for example, a single physical structure) or may be implemented as two or more physical nodes (for example, two or more distinct physical structures) . For example, a network node 110 may be a device or system that implements a part of a radio protocol stack, a device or system that implements a full radio protocol stack (such as a full gNB protocol stack) , or a collection of devices or systems that collectively implement the full radio protocol stack. For example, and as shown, a network node 110 may be an aggregated network node having an aggregated architecture, meaning that the network node 110 may implement a full radio protocol stack that is physically and logically integrated within a single physical structure in the wireless communication network 100. For example, an aggregated network node 110 may include a single standalone base station or a single TRP that operates with a full radio protocol stack to enable or facilitate communication between a UE 120 and a core network of the wireless communication network 100.

Alternatively, a network node 110 may be a disaggregated network node 110 (sometimes referred to as a disaggregated base station) , having a disaggregated architecture, meaning that the network node 110 may operate with a radio protocol stack that is physically distributed or logically distributed among two or more nodes in the same geographic location or in different geographic locations. In some deployments, disaggregated network nodes 110 may be used in an integrated access and backhaul (IAB) network, in an open radio access network (O-RAN) (such as a network configuration in compliance with the O-RAN Alliance) , or in a virtualized radio access network (vRAN) , also known as a cloud radio access network (C-RAN) , to facilitate scaling by separating network functionality into multiple units or modules that can be individually deployed.

The disaggregated network nodes 110 of the wireless communication network 100 may include one or more central units (CUs) , one or more distributed units (DUs) , and one or more radio units (RUs) . A CU may host one or more higher layers, such as a radio resource control (RRC) layer, a packet data convergence protocol (PDCP) layer, and a service data adaptation protocol (SDAP) layer, among other examples. A CU can communicate with a core network either directly (for example, via a backhaul link) or indirectly (for example, via one or more disaggregated control units, such as a non-real-time (Non-RT) RAN intelligent controller (RIC) associated with a Service Management and Orchestration (SMO) framework or a near-real-time (Near-RT) RIC) . A DU may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, or one or more higher physical (PHY) layers depending, at least in part, on a functional split, such as a functional split defined by the 3GPP. In some examples, a DU also may host a lower PHY layer that is configured to perform functions, such as a fast Fourier transform (FFT) , an inverse FFT (IFFT) , beamforming, or physical random access channel (PRACH) extraction and filtering, among other examples. An RU may perform RF processing functions or lower PHY layer functions, such as an FFT, an IFFT, beamforming, or PRACH extraction and filtering, among other examples, according to a functional split, such as a lower layer split (LLS) . In such an architecture, each RU can be operated to handle over the air (OTA) communication with one or more UEs 120. A CU may communicate with one or more DUs via respective midhaul links, such as via F1 interfaces. Each of the DUs may communicate with one or more RUs via respective fronthaul links. Each of the RUs may communicate with one or more UEs 120 via respective RF access links. In some deployments, a UE 120 may be simultaneously served by multiple RUs.

In some examples, a single network node 110 may include a combination of one or more CUs, one or more DUs, or one or more RUs. In some examples, a CU, a DU, or an RU may be implemented as a virtual unit, such as a virtual central unit (VCU) , a virtual distributed unit (VDU) , or a virtual radio unit (VRU) , among other examples, which may be implemented as a virtual network function, such as in a cloud deployment (for example, an open cloud (O-Cloud) platform) . An SMO framework may support RAN deployment and provisioning of non-virtualized and virtualized network elements.

In some examples, the wireless communication network 100 may be a heterogeneous network that includes network nodes 110 of various types. Different types of network nodes 110 may generally operate on the same or different operating bands, transmit at different power levels, or serve different coverage areas, each of which may be referred to as or associated with a particular cell 130 (for example, a cell 130a and a cell 130b) .

The UEs 120 may be physically dispersed throughout the coverage area of the wireless communication network 100, and each UE 120 may be stationary or mobile. A UE 120 may be, may include, or also may be referred to as an access terminal, a mobile station, a client device, or a subscriber unit. A UE 120 may be, include, or be coupled with a cellular phone (for example, a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (for example, a smart watch, smart clothing, smart glasses, a smart wristband, or smart jewelry) , a gaming device, an entertainment device (for example, a music device, a video device, or a satellite radio) , an XR device, a vehicular component or sensor, a smart meter or sensor, industrial manufacturing equipment, a Global Navigation Satellite System (GNSS) device (such as a Global Positioning System device or another type of positioning device) , an artificially intelligent robot or other device implementing artificial intelligence, a UE function of a network node, or any other suitable device or function that may communicate in the wireless communication network 100.

Some UEs 120 may be classified according to different categories in association with different complexities or different capabilities. UEs 120 in a first category may be associated with relatively low complexity or cost such as NB-IoT devices or eMTC UEs. UEs 120 in a second category may include higher complexity or cost devices, such as mission-critical IoT devices, baseline UEs, high-tier UEs, advanced UEs, full-capability UEs, or premium UEs that are capable of URLLC, eMBB, or precise positioning in the wireless communication network 100. A third category of UEs 120 may have mid-tier complexity or capabilities (for example, capabilities between that of the UEs 120 of the first category and the UEs 120 of the second category) . A UE 120 of the third category may be referred to as a reduced capability UE ( “RedCap UE” ) , a mid-tier UE, an NR-Light UE, or an NR-Lite UE, among other examples.

In some examples, a network node 110 may be, may include, or may operate as an RU, a TRP, or a base station that communicates with one or more UEs 120 via a radio access link (which may be referred to as a “Uu” link) . The radio access link may include a downlink and an uplink. “Downlink” (or “DL” ) refers to a communication direction from a network node 110 to a UE 120, and “uplink” (or “UL” ) refers to a communication direction from a UE 120 to a network node 110. Downlink and uplink resources may include time domain resources (for example, frames, subframes, slots, and symbols) , frequency domain resources (for example, frequency bands, component carriers (CCs) , subcarriers, resource blocks, and resource elements) , and spatial domain resources (for example, particular transmit directions or beams) .

Frequency domain resources may be subdivided into bandwidth parts (BWPs) . A BWP may be a block of frequency domain resources (for example, a continuous set of resource blocks (RBs) within a full component carrier bandwidth) that may be configured at a UE-specific level. A UE 120 may be configured with both an uplink BWP and a downlink BWP (which may be the same or different) . Each BWP may be associated with its own numerology (indicating a sub-carrier spacing (SCS) and cyclic prefix (CP) ) . A BWP may be dynamically configured or activated (for example, by a network node 110 transmitting a downlink control information (DCI) configuration to the one or more UEs 120) or reconfigured (for example, in real-time or near-real-time) according to changing network conditions in the wireless communication network 100 or specific requirements of one or more UEs 120. An active BWP defines the operating bandwidth of the UE 120 within the operating bandwidth of the serving cell.

As used herein, a downlink signal may be or include a reference signal, control information, or data. For example, downlink reference signals include a primary synchronization signal (PSS) , a secondary SS (SSS) , an SS block (SSB) (for example, that includes a PSS, an SSS, and a physical broadcast channel (PBCH) ) , a demodulation reference signal (DMRS) , a phase tracking reference signal (PTRS) , a tracking reference signal (TRS) , and a channel state information (CSI) reference signal (CSI-RS) , among other examples. A downlink signal carrying control information or data may be transmitted via a downlink channel. Downlink channels may include one or more control channels for transmitting control information and one or more data channels for transmitting data. Downlink reference signals may be transmitted in addition to, or multiplexed with, downlink control channel communications or downlink data channel communications. A downlink control channel may be specifically used to transmit DCI from a network node 110 to a UE 120. DCI generally contains the information the UE 120 needs to identify RBs in a subsequent subframe and how to decode them, including a modulation and coding scheme (MCS) or redundancy version parameters. Different DCI formats carry different information, such as scheduling information in the form of downlink or uplink grants, slot format indicators (SFIs) , preemption indicators (PIs) , transmit power control (TPC) commands, hybrid automatic repeat request (HARQ) information, new data indicators (NDIs) , among other examples. A downlink data channel may be used to transmit downlink data (for example, user data associated with a UE 120) from a network node 110 to a UE 120. Downlink control channels may include physical downlink control channels (PDCCHs) , and downlink data channels may include physical downlink shared channels (PDSCHs) . Control information or data communications may be transmitted on a PDCCH and PDSCH, respectively. For example, a PDCCH can carry DCI, while a PDSCH can carry a MAC control element (MAC-CE) , an RRC message, or user data, among other examples. Each PDSCH may carry one or more transport blocks (TBs) of data.

As used herein, an uplink signal may include a reference signal, control information, or data. For example, uplink reference signals include a sounding reference signal (SRS) , a PTRS, and a DMRS, among other examples. An uplink signal carrying control information or data may be transmitted via an uplink channel. An uplink channel may include one or more control channels for transmitting control information and one or more data channels for transmitting data. Uplink reference signals may be transmitted in addition to, or multiplexed with, uplink control channel communications or uplink data channel communications. An uplink control channel may be specifically used to transmit uplink control information (UCI) from a UE 120 to a network node 110. An uplink data channel may be used to transmit uplink data (for example, user data associated with a UE 120) from a UE 120 to a network node 110. Uplink control channels may include physical uplink control channels (PUCCHs) , and uplink data channels may include physical uplink shared channels (PUSCHs) . Control information or data communications may be transmitted on a PUCCH and PUSCH, respectively. For example, a PUCCH can carry UCI, while a PUSCH can carry a MAC-CE, an RRC message, or user data, among other examples. UCI can include a scheduling request (SR) , HARQ feedback information (for example, a HARQ acknowledgement (ACK) indication or a HARQ negative acknowledgement (NACK) indication) , uplink power control information (for example, an uplink TPC parameter) , or CSI, among other examples. CSI can include a channel quality indicator (CQI) (indicative of downlink channel conditions to facilitate selection of transmission parameters, such as an MCS, by a network node 110) , a precoding matrix indicator (PMI) , a CSI-RS resource indicator (CRI) (for example, indicative of a beam used to transmit a CSI-RS) , an SS/PBCH resource block indicator (SSBRI) (for example, indicative of a beam used to transmit an SSB) , a layer indicator (LI) , a rank indicator (RI) , or measurement information (for example, a layer 1 (L1) -reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, among other examples) which can be used for beam management, among other examples. Each PUSCH may carry one or more TBs of data.

The information (for example, data, control information, or reference signal information) transmitted by a network node 110 to a UE 120, or vice versa, may be represented as a sequence of binary bits that are mapped (for example, modulated) to an analog signal waveform (for example, a discrete Fourier transform (DFT) -spread-orthogonal frequency division multiplexing (OFDM) (DFT-s-OFDM) waveform or a CP-OFDM waveform) that is transmitted by the network node 110 or UE 120 over a wireless communication channel. In some examples, the network node 110 or the UE 120 (for example, using the processing system 145 or the processing system 140, respectively) may select an MCS (for example, an order of quadrature amplitude modulation (QAM) , such as 64-QAM, 128-QAM, or 256-QAM, among other examples) for a downlink signal or an uplink signal. For example, the network node 110 may select an MCS for a downlink signal in accordance with UCI received from the UE 120 or may transmit, to the UE 120, an indication of an MCS to be applied for an uplink signal.

A network node 110 or a UE 120 (such as by using the processing system 145 or the processing system 140, respectively, or one or more coupled modems) may perform signal processing on the information (such as filtering, amplification, modulation, digital-to-analog conversion, an IFFT operation, multiplexing, interleaving, mapping, or encoding, among other examples) to generate a processed signal in accordance with the selected MCS. In some examples, the network node 110 or the UE 120 (for example, using the processing system 145 or the processing system 140, respectively, or one or more coupled encoders or modems) may perform a channel coding operation or a forward error correction (FEC) operation to control errors in transmitted information. For example, the network node 110 or the UE 120 may perform an encoding operation to generate encoded information (such as by selectively introducing redundancy into the information, typically using an error correction code (ECC) , such as a polar code or a low-density parity-check (LDPC) code) . The network node 110 or the UE 120 (for example, using the processing system 145 or one or more modems) may further perform spatial processing (for example, precoding) on the encoded information to generate one or more processed or precoded signals for downlink or uplink transmission, respectively. In some examples, the network node 110a or the UE 120a may perform codebook-based precoding or non-codebook-based precoding. Codebook-based precoding may involve selecting a precoder (for example, a precoding matrix) using a codebook. For example, the network node 110a may provide precoding information indicating which precoder, defined by the codebook, is to be used by the UE 120a. Non-codebook-based precoding may involve selecting or deriving a precoder based on, or otherwise associated with, one or more downlink or uplink signal measurements. The network node 110a or the UE 120a may transmit the processed downlink or uplink signals, respectively, via one or more antennas.

The network node 110a or the UE 120a may receive uplink signals or downlink signals, respectively, via one or more antennas. The network node 110a or the UE 120a (for example, using the processing system 145 or the processing system 140, respectively, or one or more coupled modems) may perform signal processing (for example, in accordance with the MCS) on the received uplink or downlink signals, respectively (such as filtering, amplification, demodulation, analog-to-digital conversion, an FFT operation, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , to map the received signal (s) to a sequence of binary bits (for example, received information) that estimates the information transmitted by the network node 110 or the UE 120 via the downlink or uplink signals. The network node 110a or the UE 120a (for example, using the processing system 145 or the processing system 140, respectively, or a coupled decoder or one or more modems) may decode the received information (such as by using an ECC, a decoding operation, or an FEC operation) to detect errors or correct bit errors in the received information to generate decoded information. The decoded information may estimate the information transmitted via the downlink or uplink signals.

In some examples, a UE 120 and a network node 110 may perform MIMO communication. MIMO communication generally refers to transmitting or receiving multiple signals (such as multiple layers or multiple data streams) simultaneously over the same time and frequency resources. A network node 110 or a UE 120 may communicate using single-user MIMO or multi-user MIMO (MU-MIMO) , the latter of which being used by a network node 110 to simultaneously transmit signals to multiple UEs 120. MIMO techniques may involve spatial multiplexing (multi-layer transmission) or beamforming. To implement beamforming, the amplitudes or phases of signals transmitted via antenna elements may be modulated and shifted relative to each other (such as by manipulating a phase shift, a phase offset, or an amplitude) to generate one or more beams. For example, a network node 110 may generate one or more beams 160a, and a UE 120 may generate one or more beams 160b. The term “beam” may refer to a directional transmission of a wireless signal toward a receiving device or otherwise in a desired direction, a directional reception of a wireless signal from a transmitting device or otherwise in a desired direction, a direction associated with such a directional transmission or directional reception, a set of directional resources associated with a signal transmission or signal reception (for example, an angle of arrival, a horizontal direction, or a vertical direction) , or a set of parameters or resources associated with one or more aspects of a directional signal, among other examples.

In some examples, a network node 110 or a UE 120 may implement massive MIMO, which may be associated with an increased (for example, “massive” ) quantity of antennas at the network node 110 or at the UE 120, such as in a network implementing mmWave technology, which enables more precise beamforming or reduced interference. In some examples, the wireless communication network 100 may implement multi-TRP (mTRP) operation (including redundant transmission or reception on multiple TRPs) or non-coherent joint transmission (NC-JT) .

The network node 110 and the UE 120 may establish a communication link or beam pair, and otherwise increase reliability, throughput, signal strength, or other signal properties for MIMO communications, by performing beam management operations, such as an initial beam acquisition operation, a beam refinement operation, or a beam recovery operation. For example, an initial beam acquisition operation may involve the network node 110 transmitting signals (for example, SSBs or other signals) via respective beams (for example, of the beams 160 of the network node 110) and the UE 120 receiving and measuring the signal (s) via respective beams of multiple beams (for example, from the beams 160 of the UE 120) to identify a best beam (or beam pair) for communication between the UE 120 and the network node 110. A beam refinement operation may involve a first device (for example, the UE 120 or the network node 110) transmitting signal (s) via a subset of beams (for example, identified based on, or otherwise associated with, measurements reported as part of one or more other beam management operations) . A second device (for example, the network node 110 or the UE 120) may receive the signal (s) via a single beam (for example, to identify the best beam for communication from the subset of beams) . The beam (s) may be identified or defined via one or more spatial parameters, such as a transmission configuration indicator (TCI) state or a quasi co-location (QCL) parameter, among other examples.

Some aspects and techniques as described herein may be implemented, at least in part, using an artificial intelligence (AI) program (for example, referred to herein as an “AI/ML model” ) , such as a program that includes a machine learning (ML) model or an artificial neural network (ANN) model. The AI/ML model may be deployed at one or more devices 165 (for example, one or more network nodes 110, one or more UEs 120, one or more servers, or one or more components of a cloud computing network, among other examples) . For example, in a deployment in which AI/ML functionality is performed independently at a device 165, sometimes referred to as “overlay AI/ML, ” the AI/ML model (or an instance or portion of the AI/ML model) may be deployed at a UE 120 (for example, by the processing system 140) , a network node 110 (for example, by the processing system 145) , one or more servers, or one or more components of a cloud computing network, among other examples. Additionally, or alternatively, in a deployment where AI/ML functionality is coordinated between different devices 165, sometimes referred to as “coordinated AI/ML, ” or performed at all device and network layers, sometimes referred to as “native AI/ML, ” the AI/ML model (or an instance of the AI/ML model) may be deployed at multiple devices 165 (for example, a first portion of the AI/ML model may be deployed at a UE 120 and a second portion of the AI/ML model may be deployed at a network node 110) . In other examples of coordinated AI/ML or native AI/ML, a first AI/ML model may be deployed at a UE 120 and a second AI/ML model may be deployed at a network node 110. The AI/ML model (s) may be configured to enhance various aspects of the wireless communication network 100 (for example, to increase privacy, reliability, or efficient use of network bandwidth, or to reduce latency, among other examples) . For example, the AI/ML model (s) may be trained to identify patterns or relationships in data corresponding to the wireless communication network 100, a device, or an air interface, among other examples. The AI/ML model (s) may support operational decisions relating to one or more aspects associated with wireless communications devices, networks, or services.

Accordingly, in some examples, the AI/ML model (s) may enable AI-as-a-Service (for example, an end-to-end AI/ML service via a user plane) for use cases, such as a self-organizing network (SON) , minimization of drive test (MDT) , quality of experience (QoE) , positioning, sensing, predictive mobility, or traffic prediction, among other examples. In some examples, AI-as-a-Service use cases may include measurement collection reporting by a UE 120, device selection criteria (for example, according to a geographical area where measurements are to be collected or UE capabilities to be used to collected measurements) , or reporting configurations (for example, reporting parameters such as location, time, or sensor information, among other examples) . Additionally, or alternatively, the AI/ML model (s) may enable AI/ML procedures (for example, RAN-triggered service establishment, configuration, inferencing using UE-side or network-side models, performance monitoring or management, or capability signaling, among other examples) . Additionally, or alternatively, the AI/ML model (s) may enable RAN-based AI/ML services via one or more application program interfaces (APIs) or management interfaces for use cases, such as beam management, radio resource monitoring (RRM) relaxation, mobility prediction, load prediction, network energy savings, or coverage and capacity improvements, among other examples) .

In some aspects, the UE 120 may include a communication manager 150. As described in more detail elsewhere herein, the communication manager 150 may obtain data indicating L1 channel characteristics associated with a set of candidate resources across multiple temporal occasions; and transmit a CSI report that indicates the L1 channel characteristics for one or more resources, of the set of candidate resources, in one or more of the multiple temporal occasions, wherein the CSI report includes a set of fields with bit-widths based on a number of the multiple temporal occasions and a mapping order based on temporal occasion identifiers associated with the set of fields. Additionally, or alternatively, the communication manager 150 may perform one or more other operations described herein.

The network node 110, the processing system 145 of the network node 110, the UE 120, the processing system 140 of the UE 120, or any other component (s) of Fig. 1 may implement one or more techniques or perform one or more operations associated with ordering rules and bit-widths for fields in a multiple time domain occasion L1 report, as described in more detail elsewhere herein. For example, the processing system 145 of the network node 110, or the processing system 140 of the UE 120 may perform or direct operations of, for example, process 400 of Fig. 4 or other processes as described herein (alone or in conjunction with one or more other processors) . Memory of the network node 110 may store data and program code (or instructions) for the network node 110. In some examples, the memory of the network node 110 may store data relating to a UE 120, such as RRC state information or a UE context. Memory of a UE 120 may store data and program code (or instructions) for the UE 120, such as context information. In some examples, the memory of the UE 120 or the memory of the network node 110 may include a non-transitory computer-readable medium storing a set of instructions for wireless communication. For example, the set of instructions, when executed by one or more processors (for example, of the processing system 145 or the processing system 140) of the network node 110, or the UE 120, may cause the one or more processors to perform process 400 of Fig. 4 or other processes as described herein. In some examples, executing instructions may include running the instructions, converting the instructions, compiling the instructions, or interpreting the instructions, among other examples.

In some aspects, the UE 120 includes means for obtaining data indicating L1 channel characteristics associated with a set of candidate resources across multiple temporal occasions; or means for transmitting a CSI report that indicates the L1 channel characteristics for one or more resources, of the set of candidate resources, in one or more of the multiple temporal occasions, wherein the CSI report includes a set of fields with bit-widths based on a number of the multiple temporal occasions and a mapping order based on temporal occasion identifiers associated with the set of fields. The means for the UE 120 to perform operations described herein may include, for example, one or more of communication manager 150, processing system 140, a radio, one or more RF chains, one or more transceivers, one or more antennas, one or more modems, a reception component (for example, reception component 502 depicted and described in connection with Fig. 5) , or a transmission component (for example, transmission component 504 depicted and described in connection with Fig. 5) , among other examples.

Figs. 3A-3D are diagrams illustrating examples 300 associated with ordering rules and bit-widths for fields in a multiple time domain occasion L1 report, in accordance with the present disclosure. As described herein, examples 300 include communication between a network node (e.g., network node 110) and a UE (e.g., UE 120) . In some aspects, the network node and the UE may be included in a wireless network, such as wireless network 100. The network node and the UE may communicate via a wireless access link, which may include an uplink and a downlink.

In some aspects, as described herein, examples 300 may apply to any suitable scenario in which a network node schedules a UE to transmit a CSI report that includes feedback regarding measured and/or predicted L1 channel characteristics for multiple temporal occasions. For example, in some aspects, the network node may transmit, and the UE may receive, a CSI report configuration or another suitable configuration that indicates multiple candidate resources for measuring and/or predicting L1 channel characteristics in multiple temporal occasions, which may include any suitable combination of historical and/or future temporal occasions. For example, in some aspects, the multiple temporal occasions associated with the CSI report configuration may include one or more temporal occasions that occur prior to a slot carrying the CSI report (e.g., in which case the indicated L1 channel characteristics are measured by the UE) and/or one or more temporal occasions that occur after a slot carrying the CSI report (e.g., in which case the indicated L1 channel characteristics are predicted by the UE) . Furthermore, as described herein, the candidate resources associated with the CSI report configuration may include one or more measurement resources corresponding to SSB resources and/or CSI-RS resources and/or one or more prediction resources corresponding to SSB resources, CSI-RS resources, and/or virtual resources. In addition, as described herein, each temporal occasion may be associated with a temporal occasion identifier (ID) , which may be based on temporal occasion entry IDs associated with the CSI report. Similarly, each measurement or prediction resource may be associated with a resource ID based on resource entry IDs associated with the CSI report. In some aspects, as described herein, the measured and/or predicted L1 channel characteristics that are indicated in the CSI report may include L1-RSRP values, L1-SINR values, a prediction confidence level associated with a predicted L1-RSRP/L1-SINR value, and/or a probability of a corresponding resource being the top-1/top-K resource defined based on an L1-RSRP/L1-SINR value, among other examples.

In some aspects, when generating a CSI payload that indicates L1 channel characteristics associated with one or more resources in multiple temporal occasions, the UE may generally identify bit-widths for a set of CSI fields included in a CSI payload based at least in part on temporal occasion identifiers associated with the indicated L1 channel characteristics. Furthermore, in some aspects, the UE may identify a mapping order for a set of CSI fields included in a CSI payload based at least in part on the temporal occasion identifiers associated with the corresponding CSI fields (e.g., according to an ascending or descending order of the associated temporal occasion identifiers) . For example, in some aspects, each measured or predicted L1 channel characteristic and each resource corresponding to a measured or predicted L1 channel characteristic may be associated with a respective temporal occasion identifier, and an ordering for fields indicating the measured or predicted L1 channel characteristics and fields indicating the corresponding resources may be ordered based at least in part on the associated temporal identifiers. In some aspects, the bit-widths and the mapping order for the set of CSI fields may be indicated or otherwise signaled by the network node, or the bit-widths and the mapping order for the set of CSI fields may be defined or otherwise specified (e.g., in one or more wireless communication standards) .

For example, referring to Fig. 3A, a UE may determine a bit-width for a set of fields that indicate measured and/or predicted L1 channel characteristics for multiple temporal occasions and a set of fields indicating resource ID and temporal occasion ID pairs associated with the respective L1 channel characteristics. In some aspects, Fig. 3A illustrates example techniques that may be used to determine the bit-widths for one or more fields in a CSI report associated with multiple temporal occasions in a scenario where a CSI report configuration enables a UE to select a specific number of measurement and/or prediction resources to be addressed in a given temporal occasion. For example, in some aspects, a CSI report configuration may indicate T temporal occasions to be potentially addressed in a CSI report and N candidate measurement and/or prediction resources (referred to herein as candidate resources) that may be associated with L1 channel characteristics indicated in the CSI report, where T > 1 and N > 1. For example, Fig. 3A illustrates a CSI report configuration associated with T = 4 temporal occasions and N = 12 candidate resources. Furthermore, where the CSI report configuration enables the UE to select the number of candidate resources to be addressed in a given temporal occasion, the UE may select K resource ID and temporal occasion ID pairs to be associated with L1 channel characteristics in the CSI report (e.g., where K = 6 resource ID and temporal occasion ID pairs in Fig. 3A) .

In some aspects, as shown in Figs. 3A-3D and described herein, the CSI report that the UE transmits to the network node may include K L1 channel characteristics that are respectively associated with K resource ID and temporal occasion ID pairs. In some aspects, a set of fields that indicate the L1 channel characteristics (e.g., CSI fields 7-12 in Figs. 3A-3B and 3D, or CSI fields 8-13 in Fig. 3C) may include one or more entries (e.g., “reference” entries) that are absolutely quantized (e.g., CSI field 7 in Figs. 3A-3B, CSI field 8 in Fig. 3C, and CSI fields 7 and 10 in Fig. 3D) , and a corresponding bit-width for the entries that are absolutely quantized may be defined according to a type of the L1 channel characteristic (e.g., 7 bits for an L1-RSRP) . Furthermore, in some aspects, the set of fields indicating the L1 channel characteristics may include one or more entries (e.g., CSI fields 8-12 in Figs. 3A-3B, CSI fields 9-13 in Fig. 3C, and CSI fields 8-9 and 11-12 in Fig. 3D) that are differentially quantized relative to an absolutely quantized (e.g., “reference” ) L1 channel characteristic. In such cases, a bit-width for the entries that are differentially quantized relative to an absolutely quantized L1 channel characteristic may be defined according to the type of the L1 channel characteristic (e.g., 4 bits for a differential L1-RSRP) .

In some aspects, as shown in Fig. 3A and described herein, the CSI report that the UE transmits to the network node may include one or more fields that indicate the K resource ID and temporal occasion ID pairs associated with the L1 channel characteristics indicated in the CSI report, and a bit-width of the one or more fields may be based at least in part on the value associated with T. Additionally, or alternatively, in some aspects, the bit-width of one or more fields may be based on the value associated with N and/or the value associated with K. For example, as shown by reference number 305, the UE may explicitly report the resource ID and temporal occasion ID pair associated with each L1 channel characteristic. For example, a first CSI field may indicate a resource ID and temporal occasion ID pair associated with a first L1 channel characteristic (e.g., the strongest L1-RSRP) , a second CSI field may indicate a resource ID and temporal occasion ID pair associated with a second L1 channel characteristic, and a Kth CSI field may indicate a resource ID and temporal occasion ID pair associated with a Kth L1 channel characteristic. In cases where each resource ID and temporal occasion ID pair is explicitly reported, as shown by reference number 305, a bit width of each CSI field indicating a resource ID and temporal occasion ID pair may be based on the value associated with T and the value associated with N. For example, each resource ID may be indicated viabits (e.g., 4 bits for N = 12) and each temporal ID may be indicated viabits (e.g., 2 bits for T = 4) , whereby each resource ID and temporal ID pair may be indicated viabits (e.g., 6 bits for N = 12 and T = 4) . Alternatively, each resource ID and temporal ID report pair may be jointly quantized and encoded viabits. Alternatively, as shown by reference number 310, the resource ID and temporal ID pairs may be indicated via a bitmap with a length T×N. In such examples, for the nth resource ID in the tth temporal occasion, where 1≤n≤N and 1≤t≤T, a 0 in the ( (t-1) ×N+n) th bit indicates that an L1 channel characteristic is not reported, and a 1 in the ( (t-1) ×N+n) th bit indicates that an L1 channel characteristic is reported. Alternatively, as shown by reference number 315, the reported resource ID and temporal ID pairs may be indicated using a combinatorial index viabits (e.g., using a lookup table for the reported resource ID and temporal ID pairs) .

In some aspects, as described herein, the CSI report may be associated with a fixed payload size (e.g., the network node signals or configures the value of K via a CSI report configuration or CSI report setting, or the value of K is otherwise defined or specified, such as in a wireless communication standard) . In such cases, the set of fields indicating the L1 channel characteristics associated with the respective resource ID and temporal occasion ID pairs and the one or more fields indicating the associated resource ID and temporal occasion ID pairs may be indicated in Part-1 CSI having a fixed size. Alternatively, in cases where the UE selects the value of K, a two-part CSI report may be used to indicate the K L1 channel characteristics and the corresponding K resource ID and temporal occasion ID pairs, where the second part may have a flexible payload size based on the CSI reported in the first part. For example, in some aspects, the UE may transmit Part-1 CSI indicating the value of K, and may transmit Part-2 CSI indicating the K L1 channel characteristics and the corresponding K resource ID and temporal occasion ID pairs. In another example, the UE may transmit Part-1 CSI indicating the length T×N bitmap, and may transmit Part-2 CSI indicating the K L1 channel characteristics. In some aspects, the L1 channel characteristics that are indicated for different resource ID and temporal occasion ID pairs may be ordered in the CSI payload according to an order in which the associated resource ID and temporal occasion ID pairs appear in the same CSI payload, as described in further detail herein.

In some aspects, as shown in Figs. 3B-3D and described herein, a CSI report configuration may be associated with T>1 temporal occasions and N candidate resources, and number of measurement/prediction resources to be addressed in each temporal occasion may have a fixed value, which may be denoted K₀. For example, as shown in Figs. 3B-3C, a CSI report configuration may be associated with T = 3 temporal occasions and N = 12 candidate resources, and may indicate that the UE is to report L1 channel characteristics for K₀ = 2 resource IDs in each temporal occasion. In another example, as shown in Fig. 3D, a CSI report configuration may be associated with T = 2 temporal occasions and N = 12 candidate resources, and may indicate that the UE is to report L1 channel characteristics for K₀ = 3 resource IDs in each temporal occasion (note that 6 L1 channel characteristics per CSI report is an example only, and that K and/or K₀ may have other suitable values) . In some aspects, the value of K₀ may be indicated or otherwise configured by the network node (e.g., in the CSI report configuration) , or the value of K₀ may be otherwise defined or specified (e.g., in a wireless communication standard) . In some aspects, when the number of resources to be addressed in each temporal occasion has a fixed value, the UE may determine a mapping order for a set of fields indicating the resource IDs associated with different temporal occasions and/or a mapping order for a set of fields indicating the L1 channel characteristics for different resource ID and temporal occasion ID pairs.

For example, as shown in Figs. 3B-3D, a set of fields that indicate the resource IDs associated with respective temporal occasions may be ordered according to temporal occasion IDs or indexes (e.g., where an earliest temporal occasion is associated with a lowest ID or index, such as 0 or 1, and the ID or index is incremented by one for each temporal occasion that occurs later in time) . In such examples, the set of fields that indicate the resource IDs associated with respective temporal occasions may be ordered such that information regarding the resource IDs associated with the first (earliest) temporal occasion appears first, information regarding the resource IDs associated with the second temporal occasion appears second, and information regarding the resource IDs associated with the Tth temporal occasion appears Tth. Furthermore, in some aspects, the information regarding the resource IDs associated with the t^th temporal occasion, where 1≤t≤T, may be explicitly signaled via bits, via a length-N bitmap where the nth bit being {1, 0} indicates whether the nth resource is addressed for the tth temporal occasion, or a combinatorial index using bits (e.g., choosing K₀ resources out of the N candidates in each occasion) . Furthermore, the L1 channel characteristics associated with different resource ID and temporal occasion ID pairs may be associated with a mapping order within the CSI payload that corresponds to an order in which the associated resource ID and temporal occasion ID pairs appear within the same CSI payload.

In some aspects, as shown in Figs. 3B-3D, the mapping order (s) described above may be applied in combination with techniques that use differential quantization to report one or more L1 channel characteristics relative to an absolutely quantized value. For example, in Figs. 3B and 3C, reference numbers 320 and 325 correspond to examples where a single reference resource is associated with an absolutely quantized reference L1 channel characteristic, and remaining resources are associated with L1 channel characteristics that are differentially quantized relative to the absolutely quantized reference L1 channel characteristic. For example, as shown in Fig. 3B, the CSI payload may include a single field (e.g., in an indicated, defined, specified, or otherwise configured location in a CSI payload) that indicates a “leading” or “reference” resource ID and temporal occasion ID pair associated with the reference L1 channel characteristic (e.g., usingbits if the resource ID and the temporal occasion ID are separately quantized, or usingbits if the resource ID and the temporal occasion ID are jointly quantized) . Alternatively, as shown in Fig. 3C, the CSI payload may include a first field that indicates the resource ID associated with the reference L1 channel characteristic (e.g., usingbits) and a second field that indicates the temporal occasion ID associated with the reference L1 channel characteristic (e.g., usingbits) . In cases where the resource ID and temporal occasion ID pairs are explicitly reported, the leading or reference resource ID and temporal occasion pair may be the first field (s) in the CSI field order (e.g., the first field when the reference resource ID and temporal occasion ID are jointly reported in a single field, as in Fig. 3B, or the first two fields when the reference resource ID and the reference temporal occasion ID are reported in separate fields, as in Fig. 3C) . Otherwise, in cases where the resource ID and temporal occasion ID pairs are reported via a bitmap, a combinatorial index, or other techniques, a separate location in the CSI payload may be indicated, defined, specified, or configured for the leading or reference resource ID and temporal occasion pair.

In addition, remaining resource IDs may be reported in the mapping order based on the associated temporal occasion IDs usingbits, a length N bitmap, or acombinatorial index. As further shown in Fig. 3B and Fig. 3C, the reference L1 channel characteristic associated with the leading or reference resource ID and temporal occasion ID pair may be reported via absolute quantization (e.g., using 7 bits for an L1-RSRP value) in the first field among the set of fields indicating the L1 channel characteristics, and the remaining L1 channel characteristics with respect to the remaining resource ID and temporal occasion ID pairs may be reported via differential quantization (e.g., using 4 bits for a differential L1-RSRP) relative to the absolutely quantized L1 channel characteristics for the leading or reference resource ID and temporal occasion ID pair. In some aspects, as described herein and shown in Fig. 3B and Fig. 3C, the remaining L1 channel characteristics (e.g., other than the leading or reference L1 channel characteristic) may be ordered in the CSI payload based on the order that the respective resource ID and temporal occasion ID pairs appear in the CSI payload.

Alternatively, referring to Fig. 3D, reference number 330 corresponds to an example where each temporal occasion has a single resource associated with an absolutely quantized L1 channel characteristic, and remaining resources in a temporal occasion are associated with L1 channel characteristics that are differentially quantized relative to the absolutely quantized L1 channel characteristic for the same temporal occasion. In this case, as shown by reference number 330 in Fig. 3D, the CSI payload may include T fields (e.g., in indicated, defined, specified, or otherwise configured locations in a CSI payload) that indicate the leading or reference resource ID in each temporal occasion. In some aspects, in cases where the resource ID and temporal occasion ID pairs are explicitly reported, the leading or reference resource ID for the tth temporal occasion may be the CSI field for the first resource ID and temporal occasion ID pair for the tth temporal occasion. Alternatively, in some aspects, the CSI payload may include multiple fields that indicate the leading or reference resource ID and temporal occasion ID pairs, sequentially ordered according to the temporal occasion IDs, usingbits per pair if the resource ID and temporal occasion-ID are separately quantized. Alternatively, the leading or reference resource ID and temporal occasion ID pairs may be indicated usingbits per pair if the resource ID and temporal occasion ID are jointly quantized. Alternatively, as shown in Fig. 3D, the CSI payload may include multiple fields that indicate the leading or reference resource ID for each temporal occasion usingbits for each temporal occasion. For example, in Fig. 3D, CSI field 1 includes 4 bits to indicate the leading or reference resource ID in a first temporal occasion, and CSI field 4 includes 4 bits to indicate the leading or reference resource ID in a second temporal occasion. In addition, remaining resource IDs in each temporal occasion may be reported in a mapping order based on the associated temporal occasion IDs usingbits, a length N bitmap, or acombinatorial index.

As further shown in Fig. 3D, the L1 channel characteristics associated with the leading or reference resource ID in each temporal occasion may be reported via absolute quantization (e.g., using 7 bits for an L1-RSRP value) in the first field associated with the respective temporal occasion ID (e.g., CSI fields 7 and 10 in Fig. 3D indicate the respective L1-channel characteristics for the leading or reference resource IDs for the first and second temporal occasions) , and the remaining L1 channel characteristics with respect to the remaining resource ID in each temporal occasion may be reported via differential quantization (e.g., using 4 bits for a differential L1-RSRP) relative to the absolutely quantized L1 channel characteristics for the leading or reference resource ID. In some aspects, as described herein and shown in Fig. 3D, the remaining L1 channel characteristics (e.g., other than the leading or reference L1 channel characteristic) may be ordered in the CSI payload in accordance with the order that the respective resource ID and temporal occasion ID pairs appear within the CSI payload.

In some aspects, in cases where resource ID and temporal occasion ID pairs are indicated using one or more bitmaps (e.g., a length T×N bitmap for multiple temporal occasion IDs or a length N bitmap for each of T temporal occasion IDs) , the UE may determine the order in which the resource ID and temporal occasion ID pairs appear in the CSI payload to determine the appropriate mapping order for the fields indicating the resource ID and temporal occasion ID pairs and/or the corresponding L1 channel characteristics. For example, in some aspects, the appearance order for resource ID and temporal occasion ID pairs in a bitmap may be determined according to an order in which “1” s appear in the bitmap. For example, in the length T×N bitmap shown by reference number 310 in Fig. 3A, the appearance order of the resource ID and temporal occasion ID pairs may start with resource #5 in occasion #1, which is followed by resource #6 in occasion #1, resource #6 in occasion #2, resource #7 in occasion #2, resource #7 in occasion #3, and resource #8 in occasion #4.

Additionally, or alternatively, the appearance order for resource ID and temporal occasion ID pairs in a bitmap may be determined according to a reordering of the resource ID and temporal occasion ID pairs, first based on an ascending order of temporal occasion IDs and second based on an ascending order of the resource IDs associated with the resource ID and temporal occasion ID pairs addressed in the CSI report. Similarly, in cases where resource ID and temporal occasion ID pairs are indicated using a combinatorial index (e.g., viabits) , the appearance order of the resource ID and temporal occasion ID pairs may be determined according to a reordering of the resource ID and temporal occasion ID pairs, first based on an ascending order of temporal occasion IDs and second based on an ascending order of the resource IDs associated with the resource ID and temporal occasion ID pairs addressed in the CSI report.

In some aspects, as described herein, the UE may transmit, to the network node, a CSI report that includes a CSI payload reporting the L1 channel characteristics for K resource ID and temporal ID pairs across multiple temporal occasions. For example, in some aspects, the CSI report may be transmitted to the network node in a PUCCH that carries the CSI payload within UCI. Additionally, or alternatively, the CSI payload may be carried in a MAC-CE. For example, when reporting temporal beam prediction results (e.g., for one or more future temporal occasions) , a less stringent latency requirement may be applicable to the CSI report because the predicted L1 channel characteristics may relate to conditions that are not expected until several milliseconds or another later time relative to when the CSI payload is transmitted. Accordingly, in some aspects, the bit-width and mapping order rules described herein may apply to L1 (e.g., UCI) feedback and/or Layer 2 (L2) (e.g., MAC-CE) feedback.

As indicated above, Figs. 3A-3D are provided as examples. Other examples may differ from what is described with regard to Figs. 3A-3D.

Fig. 4 is a diagram illustrating an example process 400 performed, for example, at a UE or an apparatus of a UE. Example process 400 is an example where the apparatus or the UE (e.g., UE 120) performs operations associated with ordering rules and bit-widths for fields in multiple time domain occasion L1 report.

As shown in Fig. 4, in some aspects, process 400 may include obtaining data indicating L1 channel characteristics associated with a set of candidate resources across multiple temporal occasions (block 410) . For example, the UE (e.g., using reception component 502 or communication manager 506, depicted in Fig. 5) may obtain data indicating L1 channel characteristics associated with a set of candidate resources across multiple temporal occasions, as described above.

As further shown in Fig. 4, in some aspects, process 400 may include transmitting a CSI report that indicates the L1 channel characteristics for one or more resources, of the set of candidate resources, in one or more of the multiple temporal occasions, wherein the CSI report includes a set of fields with bit-widths based on a number of the multiple temporal occasions and a mapping order based on temporal occasion identifiers associated with the set of fields (block 420) . For example, the UE (e.g., using transmission component 504 or communication manager 506, depicted in Fig. 5) may transmit a CSI report that indicates the L1 channel characteristics for one or more resources, of the set of candidate resources, in one or more of the multiple temporal occasions, wherein the CSI report includes a set of fields with bit-widths based on a number of the multiple temporal occasions and a mapping order based on temporal occasion identifiers associated with the set of fields, as described above.

Process 400 may include additional aspects, such as any single aspect or any combination of aspects described below or in connection with one or more other processes described elsewhere herein.

In a first aspect, the set of fields includes one or more reference fields indicating a reference resource identifier and a reference temporal occasion identifier associated with a reference L1 channel characteristic among the L1 channel characteristics indicated in the CSI report.

In a second aspect, alone or in combination with the first aspect, the one or more reference fields include a first field indicating the reference resource identifier associated with the reference L1 channel characteristic according to a first bit-width based on a number of candidate resources in the set of candidate resources, and a second field indicating the reference temporal occasion identifier associated with the reference L1 channel characteristic according to a second bit-width based on the number of the multiple temporal occasions.

In a third aspect, alone or in combination with one or more of the first and second aspects, the one or more reference fields include a single field indicating the reference resource identifier and the reference temporal occasion identifier associated with the reference L1 channel characteristic according to a bit-width that is based on a number of candidate resources in the set of candidate resources and the number of the multiple temporal occasions.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, the one or more reference fields include a field indicating the reference L1 channel characteristic associated with the reference resource identifier and the reference temporal occasion identifier.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the reference L1 channel characteristic is indicated according to a bit-width that is based on an absolute quantization of the reference L1 channel characteristic.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the set of fields includes one or more fields indicating the L1 channel characteristics for remaining resource identifier and temporal occasion identifier pairs.

In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the L1 channel characteristics for remaining resource identifier and temporal occasion identifier pairs are indicated according to a bit-width that is based on a differential quantization relative to the absolute quantization of the reference L1 channel characteristic.

In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the mapping order indicates that the one or more fields indicating the L1 channel characteristics for the remaining resource identifier and temporal occasion identifier pairs are ordered according to an ordering of one or more fields indicating the resources associated with the L1 channel characteristics in each temporal occasion.

In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the set of fields includes one or more fields having a bit-width that is based on a number of candidate resources in the set of candidate resources and the number of the multiple temporal occasions to indicate resource identifier and temporal occasion identifier pairs associated with the L1 channel characteristics indicated in the CSI report.

In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the set of fields includes a bitmap with a bit-width that is based on a number of candidate resources in the set of candidate resources and the number of the multiple temporal occasions, and each bit in the bitmap indicates whether the CSI report indicates an L1 channel characteristic for an associated candidate resource and temporal occasion pair.

In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, the set of fields includes a combinatorial index with a bit-width that is based on a number of candidate resources in the set of candidate resources, the number of the multiple temporal occasions, and a number of candidate resource and temporal occasion pairs associated with the L1 channel characteristics indicated in the CSI report.

Although Fig. 4 shows example blocks of process 400, in some aspects, process 400 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 4. Additionally, or alternatively, two or more of the blocks of process 400 may be performed in parallel.

Fig. 5 is a diagram of an example apparatus 500 for wireless communication. The apparatus 500 may be a UE 120, or a UE 120 may include the apparatus 500. In some aspects, the apparatus 500 includes a reception component 502, a transmission component 504, or a communication manager 506, which may be in communication with one another (for example, via one or more buses or one or more other components) . In some aspects, the communication manager 506 is the communication manager 150 described in connection with Fig. 1. As shown, the apparatus 500 may communicate with another apparatus 508, such as a UE or a network node (such as a CU, a DU, an RU, or a base station) , using the reception component 502 and the transmission component 504. The communication manager 506 may be included in, or implemented via, a processing system (for example, the processing system 140 described in connection with Fig. 1) of the UE 120.

In some aspects, the apparatus 500 may be configured to perform one or more operations described herein in connection with Figs. 3A-3D. Additionally, or alternatively, the apparatus 500 may be configured to perform one or more processes described herein, such as process 400 of Fig. 4. In some aspects, the apparatus 500 or one or more components shown in Fig. 5 may include one or more components of the UE 120 described in connection with Fig. 1. Additionally, or alternatively, one or more components shown in Fig. 5 may be implemented within one or more components described in connection with Fig. 1. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in one or more memories. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the functions or operations of the component.

The reception component 502 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 508. The reception component 502 may provide received communications to one or more other components of the apparatus 500. In some aspects, the reception component 502 may perform signal processing on the received communications, and may provide the processed signals to the one or more other components of the apparatus 500. In some aspects, the reception component 502 may include one or more components of the UE 120 described above in connection with Fig. 1, such as a radio, one or more RF chains, one or more transceivers, or one or more modems, each of which may in turn be coupled with one or more antennas of the UE 120.

The transmission component 504 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 508. In some aspects, one or more other components of the apparatus 500 may generate communications and may provide the generated communications to the transmission component 504 for transmission to the apparatus 508. In some aspects, the transmission component 504 may perform signal processing on the generated communications, and may transmit the processed signals to the apparatus 508. In some aspects, the transmission component 504 may include one or more components of the UE 120 described above in connection with Fig. 1, such as a radio, one or more RF chains, one or more transceivers, or one or more modems, each of which may in turn be coupled with one or more antennas of the UE 120 described in connection with Fig. 1. In some aspects, the transmission component 504 may be co-located with the reception component 502.

The communication manager 506 may support operations of the reception component 502 or the transmission component 504. For example, the communication manager 506 may receive information associated with configuring reception of communications by the reception component 502 or transmission of communications by the transmission component 504. Additionally, or alternatively, the communication manager 506 may generate or provide control information to the reception component 502 or the transmission component 504 to control reception or transmission of communications.

The reception component 502 and/or the communication manager 506 may obtain data indicating L1 channel characteristics associated with a set of candidate resources across multiple temporal occasions. The transmission component 504 may transmit a CSI report that indicates the L1 channel characteristics for one or more resources, of the set of candidate resources, in one or more of the multiple temporal occasions, wherein the CSI report includes a set of fields with bit-widths based on a number of the multiple temporal occasions and a mapping order based on temporal occasion identifiers associated with the set of fields.

The number and arrangement of components shown in Fig. 5 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 5. Furthermore, two or more components shown in Fig. 5 may be implemented within a single component, or a single component shown in Fig. 5 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 5 may perform one or more functions described as being performed by another set of components shown in Fig. 5.

The following provides an overview of some Aspects of the present disclosure:

Aspect 1: A method of wireless communication performed by a UE, comprising: obtaining data indicating L1 channel characteristics associated with a set of candidate resources across multiple temporal occasions; and transmitting a CSI report that indicates the L1 channel characteristics for one or more resources, of the set of candidate resources, in one or more of the multiple temporal occasions, wherein the CSI report includes a set of fields with bit-widths based on a number of the multiple temporal occasions and a mapping order based on temporal occasion identifiers associated with the set of fields.

Aspect 2: The method of Aspect 1, wherein the set of fields includes one or more reference fields indicating a reference resource identifier and a reference temporal occasion identifier associated with a reference L1 channel characteristic among the L1 channel characteristics indicated in the CSI report.

Aspect 3: The method of Aspect 2, wherein the one or more reference fields include: a first field indicating the reference resource identifier associated with the reference L1 channel characteristic according to a first bit-width based on a number of candidate resources in the set of candidate resources, and a second field indicating the reference temporal occasion identifier associated with the reference L1 channel characteristic according to a second bit-width based on the number of the multiple temporal occasions.

Aspect 4: The method of Aspect 2, wherein the one or more reference fields include: a single field indicating the reference resource identifier and the reference temporal occasion identifier associated with the reference L1 channel characteristic according to a bit-width that is based on a number of candidate resources in the set of candidate resources and the number of the multiple temporal occasions.

Aspect 5: The method of any of Aspects 2-4, wherein the one or more reference fields include: a field indicating the reference L1 channel characteristic associated with the reference resource identifier and the reference temporal occasion identifier.

Aspect 6: The method of Aspect 5, wherein the reference L1 channel characteristic is indicated according to a bit-width that is based on an absolute quantization of the reference L1 channel characteristic.

Aspect 7: The method of Aspect 6, wherein the set of fields include: one or more fields indicating the L1 channel characteristics for remaining resource identifier and temporal occasion identifier pairs.

Aspect 8: The method of Aspect 7, wherein the L1 channel characteristics for remaining resource identifier and temporal occasion identifier pairs are indicated according to a bit-width that is based on a differential quantization relative to the absolute quantization of the reference L1 channel characteristic.

Aspect 9: The method of any of Aspects 1-8, wherein the mapping order indicates that the one or more fields indicating the L1 channel characteristics for the remaining resource identifier and temporal occasion identifier pairs are ordered according to an ordering of one or more fields indicating the resources associated with the L1 channel characteristics in each temporal occasion.

Aspect 10: The method of any of Aspects 1-9, wherein the set of fields includes one or more fields having a bit-width that is based on a number of candidate resources in the set of candidate resources and the number of the multiple temporal occasions to indicate resource identifier and temporal occasion identifier pairs associated with the L1 channel characteristics indicated in the CSI report.

Aspect 11: The method of any of Aspects 1-10, wherein the set of fields includes a bitmap with a bit-width that is based on a number of candidate resources in the set of candidate resources and the number of the multiple temporal occasions, and wherein each bit in the bitmap indicates whether the CSI report indicates an L1 channel characteristic for an associated candidate resource and temporal occasion pair.

Aspect 12: The method of any of Aspects 1-11, wherein the set of fields includes a combinatorial index with a bit-width that is based on a number of candidate resources in the set of candidate resources, the number of the multiple temporal occasions, and a number of candidate resource and temporal occasion pairs associated with the L1 channel characteristics indicated in the CSI report.

Aspect 13: An apparatus for wireless communication at a device, the apparatus comprising one or more processors; one or more memories coupled with the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method of one or more of Aspects 1-12.

Aspect 14: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors configured to cause the device to perform the method of one or more of Aspects 1-12.

Aspect 15: An apparatus for wireless communication, the apparatus comprising at least one means for performing the method of one or more of Aspects 1-12.

Aspect 16: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by one or more processors to perform the method of one or more of Aspects 1-12.

Aspect 17: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 1-12.

Aspect 18: A device for wireless communication, the device comprising a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the device to perform the method of one or more of Aspects 1-12.

Aspect 19: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to cause the device to perform the method of one or more of Aspects 1-12.

Aspect 20: A device comprising a processing system that includes one or more processors and one or more code-storing memories coupled with the one or more processors, the processing system configured to cause the device to perform the method of one or more of Aspects 1-12.

Aspect 21: A device comprising a processing system that includes processor circuitry and code-storing memory circuitry, the processing system configured to cause the device to perform the method of one or more of Aspects 1-12.

It will be apparent that systems or methods described herein may be implemented in different forms of hardware or a combination of hardware and software. A component being configured to perform a function means that the component has a capability to perform the function, and does not require the function to be actually performed by the component, unless noted otherwise.

As used herein, the term “determine” or “determining” can encompass one or more of a wide variety of actions. For example, “determining” can include one or more of calculating, computing, processing, deriving, detecting, estimating, investigating, looking up, inferring, ascertaining, measuring, resolving, selecting, choosing, obtaining, identifying, interpreting, demodulating, decoding, reading, establishing, forming or generating, among other examples. In some such examples, determining can involve a processor performing some type of calculating, computing, deriving, estimating, inferring, ascertaining, resolving, predicting or other processing to obtain one or more numerical values, sets, elements or other information or results. In some other such examples, determining can involve a processor identifying, looking up, investigating or otherwise obtaining some type of value, set, element or other information or result from a table, a data structure, a database or other memory device or location. In some other such examples, determining can involve a processor identifying, interpreting, demodulating, decoding, detecting, reading or otherwise obtaining some type of value, set, element or other information or result signaled in, for example, a received wireless packet. In some other such examples, determining can involve a processor selecting or choosing one or more values, sets, elements or other information or results from a larger set of values, sets elements or other information or results. In some other such examples, determining can involve a processor performing a measurement, such as on a received signal.

As used herein, the articles “a” and “an” are intended to refer to one or more items and may be used interchangeably with “one or more” or “at least one. ” As used herein, a phrase referring to “at least one of” or “one or more of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover: a, b, c, a-b, a-c, b-c, and a-b-c. Additionally, as used herein, a phrase referring to “a” or “an” element refers to one or more of such elements acting individually or collectively to perform the recited function (s) . Additionally, as used herein, a “set” can refer to one or more items, and a “subset” can refer to a whole set or less than the whole set, but not an empty set. “Set, ” “group, ” and similar terms are intended to include one or more items and may be used interchangeably with “one or more. ” Furthermore, as used herein, the term “or” is intended to be interpreted in the inclusive sense (such as when referring to a series) and may be used interchangeably with “and/or, ” unless otherwise explicitly indicated (for example, if used in conjunction with “either” or “only one of” ) . For example, “Aor B” may include A only, B only, or a combination of A and B. Also, as used herein, the terms “has, ” “have, ” “having, ” “comprise, ” “comprising, ” “include” and “including, ” and derivatives thereof or similar terms are intended to be open-ended terms that do not limit an element that they modify (for example, an element “having” A also may have B) .

As used herein, the phrase “associated with” is intended to be interpreted in the inclusive sense, unless otherwise explicitly indicated. For example, the phrase “associated with” is not to be construed as a reference to a closed set of conditions, factors, criteria, elements, components, or actions, among other examples. Specifically, unless a phrase refers to “associated with only ‘a, ’ ” or the equivalent in context, whatever it is that is “associated with ‘a, ’ ” may be associated with “a” alone or associated with a combination of “a” and one or more other conditions, factors, criteria, elements, components, or actions, among other examples. In various examples, the phrase “associated with” may be interpreted to mean “in association with, ” “in accordance with, ” “based on, ” “based at least in part on, ” “as a function of, ” “in response to, ” “responsive to, ” or “using” as appropriate in the relevant context unless otherwise explicitly indicated. Furthermore, what follows the phrase “associated with, ” “in association with, ” “in accordance with, ” “based on, ” “based at least in part on, ” “as a function of, ” “in response to, ” “responsive to, ” or “using” is not necessarily the focal point or primary factor associated with the limitation preceding the phrase.

As used herein, “satisfying a threshold” may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, or not equal to the threshold, among other examples.

Even though particular combinations of features are recited in the claims or disclosed in the specification, these combinations are not intended to limit the scope of all aspects described herein. Many of these features may be combined in ways not specifically recited in the claims or disclosed in the specification. The disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set.

Claims

An apparatus for wireless communication at a user equipment (UE) , comprising:

a processing system that includes one or more processors and one or more code-storing memories coupled with the one or more processors, the processing system configured to cause the apparatus to:

obtain data indicating Layer 1 (L1) channel characteristics associated with a set of candidate resources across multiple temporal occasions; and

transmit a channel state information (CSI) report that indicates the L1 channel characteristics for one or more resources, of the set of candidate resources, in one or more of the multiple temporal occasions, wherein the CSI report includes a set of fields with bit-widths based on a number of the multiple temporal occasions and a mapping order based on temporal occasion identifiers associated with the set of fields.
The apparatus of claim 1, wherein the set of fields includes one or more reference fields indicating a reference resource identifier and a reference temporal occasion identifier associated with a reference L1 channel characteristic among the L1 channel characteristics indicated in the CSI report.
The apparatus of claim 2, wherein the one or more reference fields include:

a first field indicating the reference resource identifier associated with the reference L1 channel characteristic according to a first bit-width based on a number of candidate resources in the set of candidate resources, and

a second field indicating the reference temporal occasion identifier associated with the reference L1 channel characteristic according to a second bit-width based on the number of the multiple temporal occasions.
The apparatus of claim 2, wherein the one or more reference fields include:

a single field indicating the reference resource identifier and the reference temporal occasion identifier associated with the reference L1 channel characteristic according to a bit-width that is based on a number of candidate resources in the set of candidate resources and the number of the multiple temporal occasions.
The apparatus of claim 2, wherein the one or more reference fields include:

a field indicating the reference L1 channel characteristic associated with the reference resource identifier and the reference temporal occasion identifier.
The apparatus of claim 5, wherein the reference L1 channel characteristic is indicated according to a bit-width that is based on an absolute quantization of the reference L1 channel characteristic.
The apparatus of claim 6, wherein the set of fields includes:

one or more fields indicating the L1 channel characteristics for remaining resource identifier and temporal occasion identifier pairs.
The apparatus of claim 7, wherein the L1 channel characteristics for remaining resource identifier and temporal occasion identifier pairs are indicated according to a bit-width that is based on a differential quantization relative to the absolute quantization of the reference L1 channel characteristic.
The apparatus of claim 7, wherein the mapping order indicates that the one or more fields indicating the L1 channel characteristics for the remaining resource identifier and temporal occasion identifier pairs are ordered according to an ordering of one or more fields indicating the resources associated with the L1 channel characteristics in each temporal occasion.
The apparatus of claim 1, wherein the set of fields includes one or more fields having a bit-width that is based on a number of candidate resources in the set of candidate resources and the number of the multiple temporal occasions to indicate resource identifier and temporal occasion identifier pairs associated with the L1 channel characteristics indicated in the CSI report.
The apparatus of claim 1, wherein the set of fields includes a bitmap with a bit-width that is based on a number of candidate resources in the set of candidate resources and the number of the multiple temporal occasions, and wherein each bit in the bitmap indicates whether the CSI report indicates an L1 channel characteristic for an associated candidate resource and temporal occasion pair.
The apparatus of claim 1, wherein the set of fields includes a combinatorial index with a bit-width that is based on a number of candidate resources in the set of candidate resources, the number of the multiple temporal occasions, and a number of candidate resource and temporal occasion pairs associated with the L1 channel characteristics indicated in the CSI report.
A method of wireless communication performed by a user equipment (UE) , comprising:

obtaining data indicating Layer 1 (L1) channel characteristics associated with a set of candidate resources across multiple temporal occasions; and

transmitting a channel state information (CSI) report that indicates the L1 channel characteristics for one or more resources, of the set of candidate resources, in one or more of the multiple temporal occasions, wherein the CSI report includes a set of fields with bit-widths based on a number of the multiple temporal occasions and a mapping order based on temporal occasion identifiers associated with the set of fields.
The method of claim 13, wherein the set of fields includes:

a first reference field indicating a reference resource identifier associated with a reference L1 channel characteristic according to a first bit-width based on a number of candidate resources in the set of candidate resources, and

a second reference field indicating a reference temporal occasion identifier associated with the reference L1 channel characteristic according to a second bit-width based on the number of the multiple temporal occasions.
The method of claim 13, wherein the set of fields includes:

a single field indicating a reference resource identifier and a reference temporal occasion identifier associated with a reference L1 channel characteristic according to a bit-width that is based on a number of candidate resources in the set of candidate resources and the number of the multiple temporal occasions.
The method of claim 13, wherein the set of fields includes:

a field indicating a reference L1 channel characteristic associated with a reference resource identifier and a reference temporal occasion identifier.
The method of claim 13, wherein the set of fields includes one or more fields having a bit-width that is based on a number of candidate resources in the set of candidate resources and the number of the multiple temporal occasions to indicate resource identifier and temporal occasion identifier pairs associated with the L1 channel characteristics indicated in the CSI report.
The method of claim 13, wherein the set of fields includes a bitmap with a bit-width that is based on a number of candidate resources in the set of candidate resources and the number of the multiple temporal occasions, and wherein each bit in the bitmap indicates whether the CSI report indicates an L1 channel characteristic for an associated candidate resource and temporal occasion pair.
The method of claim 13, wherein the set of fields includes a combinatorial index with a bit-width that is based on a number of candidate resources in the set of candidate resources, the number of the multiple temporal occasions, and a number of candidate resource and temporal occasion pairs associated with the L1 channel characteristics indicated in the CSI report.
An apparatus for wireless communication, comprising:

means for obtaining data indicating Layer 1 (L1) channel characteristics associated with a set of candidate resources across multiple temporal occasions; and

means for transmitting a channel state information (CSI) report that indicates the L1 channel characteristics for one or more resources, of the set of candidate resources, in one or more of the multiple temporal occasions, wherein the CSI report includes a set of fields with bit-widths based on a number of the multiple temporal occasions and a mapping order based on temporal occasion identifiers associated with the set of fields.