Facilitating the multiplexing of downlink grant-triggered aperiodic channel state information reports on the uplink control channel

Abstract

Disclosed herein are apparatus, methods, and computer-readable media for facilitating multiplexing of downlink grant-triggered aperiodic channel state information reports on an uplink control channel. An example method for wireless communication at a UE includes receiving a schedule to provide multiple A-CSI reports while forgoing A-CSI multiplexing, the schedule being for at most two A-CSI reports in the same timeslot for the UE, and the multiple A-CSI reports not overlapping in time in the same timeslot. The example method also includes transmitting the multiple A-CSI reports to a base station in corresponding PUCCHs in the same timeslot while forgoing CSI multiplexing.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of and priority to U.S. Provisional Application Serial No. 63 / 063,150, filed on August 7, 2020, entitled “METHODS AND APPARATUS TO FACILITATE MULTIPLEXING OF DOWNLINK GRANT-TRIGGERED APERIODIC CHANNEL STATE INFORMATION REPORTS ON UPLINK CONTROL CHANNEL,” and U.S. Patent Application Serial No. 17 / 393,318, filed on August 3, 2021, entitled “METHODS AND APPARATUS TO FACILITATEMULTIPLEXING OF DOWNLINK GRANT-TRIGGERED APERIODIC CHANNEL STATE INFORMATION REPORTS ON UPLINK CONTROL CHANNEL,” the entire contents of which are expressly incorporated herein by reference. Technical Field

[0003] The present disclosure relates generally to communication systems and, more particularly, to wireless communications using channel state information feedback. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0005] These multiple access technologies have been adopted by various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, regional, and even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of the continued evolution of mobile broadband released by the 3rd Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (such as the Internet of Things (IoT)), and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. Further improvements to 5G NR technology are needed. These improvements may also be applicable to other multiple access technologies and telecommunication standards that adopt these technologies. Summary of the Invention

[0006] The following is a simplified summary of one or more aspects in order to provide a basic understanding of these aspects. This summary is not an extensive overview of all contemplated aspects and is neither intended to identify key or critical elements of all aspects nor to delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that will be presented later.

[0007] In one aspect of the present disclosure, a method, computer-readable medium, and apparatus for wireless communication at a user equipment (UE) are provided. An example apparatus receives a schedule to provide multiple aperiodic channel state information (A-CSI) reports while abandoning A-CSI multiplexing, the schedule being for up to two A-CSI reports for the UE in the same time slot, and the multiple A-CSI reports do not overlap in time in the same time slot. In addition, the example apparatus transmits the multiple A-CSI reports to a base station in corresponding physical uplink control channels (PUCCHs) in the same time slot and while abandoning channel state information (CSI) multiplexing.

[0008] In another aspect of the present disclosure, a method, computer-readable medium, and apparatus for wireless communication at a UE are provided. The example apparatus receives a downlink grant that schedules the UE to provide an A-CSI report, the downlink grant including at least one of a counter downlink allocation indicator (DAI) associated with the A-CSI report and a total number DAI associated with the A-CSI report, the counter DAI indicating an index of the A-CSI report in an A-CSI codebook for multiplexing multiple A-CSI reports, and the total number DAI indicating the total number of A-CSI reports to be multiplexed in a PUCCH resource. In addition, the example apparatus transmits the CSI report to a base station in the PUCCH based on the downlink grant.

[0009] In another aspect of the present disclosure, a method, computer-readable medium, and apparatus for wireless communication at a base station are provided. The example apparatus schedules a UE to provide multiple A-CSI reports while forgoing A-CSI multiplexing. The example apparatus also schedules a maximum of two A-CSI reports for the UE in the same time slot, with the multiple A-CSI reports not overlapping in time in the same time slot. Additionally, the example apparatus receives the multiple A-CSI reports from the UE in corresponding PUCCHs.

[0010] In another aspect of the present disclosure, a method, computer-readable medium, and apparatus for wireless communication at a base station are provided. The example apparatus transmits a downlink grant that schedules a UE to provide an A-CSI report, the downlink grant including at least one of a counter DAI associated with the A-CSI report and a total number DAI associated with the A-CSI report, the counter DAI indicating an index of the A-CSI report in an A-CSI codebook used to multiplex multiple A-CSI reports, and the total number DAI indicating the total number of A-CSI reports to be multiplexed in a PUCCH resource. Additionally, the example apparatus receives a CSI report from the UE in a PUCCH based on the downlink grant.

[0011] To accomplish the foregoing and related ends, one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of one or more aspects. However, these features are indicative of but a few of the various ways in which the principles of the various aspects may be employed, and this description is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0013] Figure 2A is a diagram illustrating an example of a first frame according to various aspects of the present disclosure.

[0014] Figure 2B is a diagram illustrating an example of DL channels within a subframe according to various aspects of the present disclosure.

[0015] Figure 2C is a diagram illustrating an example of a second frame according to various aspects of the present disclosure.

[0016] Figure 2D is a diagram illustrating an example of UL channels within a subframe according to various aspects of the present disclosure.

[0017] Figure 3 is a diagram illustrating an example of a base station and a UE in an access network.

[0018] Figure 4is a diagram illustrating an example timeline for downlink grant-triggered aperiodic CSI feedback in accordance with various aspects of the present disclosure.

[0019] Figure 5 Depicted are example timelines including time and frequency domains according to various aspects of the present disclosure.

[0020] Figure 6A An example process of a UE receiving multiple downlink grants in carrier aggregation according to various aspects of the present disclosure is illustrated.

[0021] Figure 6B An example process for a UE to receive multiple downlink grants for the same carrier according to various aspects of the present disclosure is illustrated.

[0022] Figure 7 An example timeline is illustrated in which PUCCH resources for aperiodic CSI reporting are indicated via RRC signaling according to the teachings disclosed herein.

[0023] Figure 8A Depicts an example time slot in which multiple PUCCH resources may be scheduled for transmission by a UE in accordance with one or more techniques disclosed herein.

[0024] Figure 8B Depicted is another example time slot within which multiple PUCCH resources may be scheduled for transmission by a UE in accordance with one or more techniques disclosed herein.

[0025] Figure 9 The multiplexing sequence of PUCCH resources within a time slot according to the teachings disclosed herein is illustrated.

[0026] Figure 10 Illustrated is a diagram including multiple downlink grants that trigger separate PUCCH resources for sending aperiodic CSI feedback and HARQ feedback according to the teachings disclosed herein.

[0027] Figure 11 Illustrated is a diagram including multiple downlink grants that trigger separate PUCCH resources for sending aperiodic CSI feedback and HARQ feedback according to the teachings disclosed herein.

[0028] Figure 12 is an example communication flow between a base station and a UE according to the teachings disclosed herein.

[0029] Figure 13 is a flow chart of a method of wireless communication at a base station according to the teachings disclosed herein.

[0030] Figure 14is a flow chart of a method of wireless communication at a UE according to the teachings disclosed herein.

[0031] Figure 15 is a flow chart of a method of wireless communication at a base station according to the teachings disclosed herein.

[0032] Figure 16 is a flow chart of a method of wireless communication at a UE according to the teachings disclosed herein.

[0033] Figure 17 is a diagram illustrating an example of a hardware implementation for an example apparatus according to the teachings disclosed herein.

[0034] Figure 18 is a flow chart of a method of wireless communication at a base station according to the teachings disclosed herein.

[0035] Figure 19 is a flow chart of a method of wireless communication at a base station according to the teachings disclosed herein.

[0036] Figure 20 is a flow chart of a method of wireless communication at a base station according to the teachings disclosed herein.

[0037] Figure 21 is another flow chart of a method of wireless communication at a base station according to the teachings disclosed herein.

[0038] Figure 22 is a diagram illustrating an example of a hardware implementation for an example apparatus according to the teachings disclosed herein. DETAILED DESCRIPTION

[0039] The detailed description given below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configuration in which the concepts described herein may be practiced. In order to provide a thorough understanding of the various concepts, the detailed description includes specific details. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some cases, well-known structures and components are shown in block diagram form to avoid obscuring these concepts.

[0040] Several aspects of telecommunications systems will now be described with reference to various apparatus and methods. These apparatus and methods are described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively, "elements"). These elements can be implemented using electronic hardware, computer software, or any combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0041] For example, an element, or any part of an element, or any combination of elements can be implemented as a "processing system" including one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gate logic, discrete hardware circuits, and other suitable hardware configured to perform the various functions described throughout this disclosure. One or more processors in a processing system can execute software. Software should be broadly interpreted as instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, processes, functions, etc., whether referring to software, firmware, middleware, microcode, hardware description languages, or other names.

[0042] Thus, in one or more example aspects, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on a computer-readable medium or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. The storage medium may be any available medium that a computer can access. By way of example and not limitation, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, a combination of computer-readable media types, or any other medium that can be used to store computer-executable code in the form of computer-accessible instructions or data structures.

[0043] Although aspects and implementations are described in this application by way of illustration of some examples, it will be understood by those skilled in the art that additional implementations and use cases may occur in many different arrangements and scenarios. The innovations described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, implementation and / or use may be achieved through integrated chip implementations and other devices based on non-module components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial devices, retail / procurement devices, medical devices, devices supporting artificial intelligence (AI), etc.). Although some examples may or may not be specifically targeted at use cases or applications, the wide applicability of the described innovations may occur. The scope of implementation can range from chip-level or modular components to non-modular, non-chip-level implementations, and further to aggregated, distributed, or original equipment manufacturer (OEM) devices or systems that include one or more aspects of the described innovations. In some actual settings, the devices incorporating the described aspects and features may also include additional components and features for implementing and practicing the required and described aspects. For example, the transmission and reception of wireless signals necessarily include many components for both analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.). It is intended that the innovations described herein can be practiced in a wide variety of devices of varying sizes, shapes, and configurations, chip-level components, systems, distributed arrangements, aggregated or non-aggregated components, end-user devices, and the like.

[0044] The UE may provide feedback to the base station. For example, the UE may use an uplink control channel (e.g., a physical uplink control channel (PUCCH)) to send uplink control information (UCI), such as channel state information (CSI) feedback and / or hybrid automatic repeat request (HARQ) feedback. In some examples, the UE may be scheduled to send multiple transmissions in the same time slot. However, the UE may be prevented from sending two transmissions that overlap in time. For example, the UE may send one PUCCH or two PUCCHs in the same time slot, and when two PUCCHs are sent in the same time slot, the two PUCCHs should occupy different symbols in the same time slot to avoid overlapping in time. When two resources occupy the same symbol in one time slot, the two resources are said to be in conflict.

[0045] Examples disclosed herein provide techniques for resolving such conflicts. For example, examples disclosed herein provide techniques for indicating PUCCH resources for transmitting aperiodic CSI reports. In some examples, the PUCCH resources may be indicated within a downlink grant. In some examples, the PUCCH resources may be derived based on information provided in the downlink grant.

[0046] In some examples, different types of feedback may be scheduled for the same time slot. For example, a UE may be scheduled to transmit a first PUCCH resource associated with aperiodic CSI feedback and a second PUCCH resource associated with HARQ feedback. Examples disclosed herein provide techniques for enabling a UE to provide both CSI feedback and HARQ feedback while avoiding resource conflicts.

[0047] Figure 1 1 is a diagram illustrating an example of a wireless communication system and access network 100 including base stations 102 and 180 and a UE 104. In certain aspects, a device, such as UE 104, communicating with a base station can be configured to manage one or more aspects of wireless communication by facilitating multiplexing of uplink control information. For example, UE 104 can include a UCI multiplexing component 198 configured to receive a schedule to provide multiple A-CSI reports while forgoing A-CSI multiplexing, the schedule being for scheduling up to two A-CSI reports for the UE in the same time slot, and the multiple A-CSI reports being non-overlapping in time within the same time slot. Additionally, the example UCI multiplexing component 198 can be configured to transmit the multiple A-CSI reports to the base station in corresponding PUCCHs in the same time slot while forgoing CSI multiplexing.

[0048] In another aspect of the present disclosure, the exemplary UCI multiplexing component 198 may be configured to receive a downlink grant that schedules a UE to provide an A-CSI report, the downlink grant including at least one of a counter DAI associated with the A-CSI report and a total number DAI associated with the A-CSI report, the counter DAI indicating an index of the A-CSI report in an A-CSI codebook for multiplexing multiple A-CSI reports, and the total number DAI indicating the total number of A-CSI reports to be multiplexed in the PUCCH resources. Furthermore, the exemplary UCI multiplexing component 198 may be configured to send the CSI report to the base station in the PUCCH based on the downlink grant.

[0049] Still a reference Figure 1 , base station 180 may include a UCI management component 199 configured to schedule a UE to provide multiple A-CSI reports while forgoing A-CSI multiplexing. The exemplary UCI management component 199 may also be configured to schedule a maximum of two A-CSI reports for the UE in the same time slot, where the multiple A-CSI reports in the same time slot are non-overlapping in time. In addition, the exemplary UCI management component 199 may be configured to receive multiple A-CSI reports in a corresponding PUCCH from the UE.

[0050] In another aspect of the present disclosure, the exemplary UCI management component 199 may be configured to send a downlink grant scheduling a UE to provide an A-CSI report, the downlink grant including at least one of a counter DAI associated with the A-CSI report and a total number DAI associated with the A-CSI report, the counter DAI indicating an index of the A-CSI report in an A-CSI codebook for multiplexing multiple A-CSI reports, and the total number DAI indicating the total number of A-CSI reports to be multiplexed in the PUCCH resource. Furthermore, the exemplary UCI management component 199 may be configured to receive a CSI report from the UE in the PUCCH based on the downlink grant.

[0051] Although the following description provides examples for 5G NR (and in particular the multiplexing of aperiodic CSI feedback), the concepts described herein may be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and / or other wireless technologies where a UE may multiplex uplink control information to, for example, avoid resource conflicts.

[0052] Figure 1 An example of a wireless communication system (also known as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)). The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). A macro cell includes a base station. A small cell includes a femto cell, a pico cell, and a micro cell.

[0053] A base station 102 configured for 4G LTE (collectively referred to as the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with the EPC 160 via a first backhaul link 132 (e.g., an S1 interface). A base station 102 configured for 5G NR (collectively referred to as the Next Generation RAN (NG-RAN)) can interface with the core network 190 via a second backhaul link 184. The base station 102 can perform one or more of the following functions, among other things: transmission of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), user and device tracking, RAN information management (RIM), paging, positioning, and warning delivery messaging. Base stations 102 can communicate with each other directly or indirectly (eg, via EPC 160 or core network 190) via a third backhaul link 134 (eg, an X2 interface). First backhaul link 132, second backhaul link 184, and third backhaul link 134 can be wired or wireless.

[0054] Base stations 102 can communicate wirelessly with UEs 104. Each base station 102 can provide communication coverage for its own geographic coverage area 110. There can be overlapping geographic coverage areas 110. For example, a small cell 102' can have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network that includes small cells and macro cells can be referred to as a heterogeneous network. A heterogeneous network can also include a Home Evolved Node B (eNB) (HeNB), which can provide service to a restricted group called a Closed Subscriber Group (CSG). The communication link 120 between the base station 102 and the UE 104 can include uplink (UL) (also known as reverse link) transmissions from the UE 104 to the base station 102 and / or downlink (DL) (also known as forward link) transmissions from the base station 102 to the UE 104. The communication link 120 can use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication link can be through one or more operators. Base station 102 / UE 104 can use spectrum with up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) of bandwidth per carrier allocated in carrier aggregation for a total of Yx MHz (x component carriers) for transmission in each direction. The carriers may be adjacent or non-adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL). Component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell) and the secondary component carrier may be referred to as a secondary cell (SCell).

[0055] Certain UEs 104 may communicate with each other using device-to-device (D2D) communication links 158. The D2D communication links 158 may use the DL / UL WWAN spectrum. The D2D communication links 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). D2D communication may be performed via various wireless D2D communication systems, such as WiMedia, Bluetooth, ZigBee, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0056] The wireless communication system may also include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 via a communication link 154, for example, in a 5 GHz unlicensed spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) to determine whether the channel is available before communicating.

[0057] The small cell 102' can operate in licensed and / or unlicensed spectrum. When operating in the unlicensed spectrum, the small cell 102' can adopt NR and use the same unlicensed spectrum (e.g., 5 GHz, etc.) used by the Wi-Fi AP 150. The small cell 102' adopting NR in the unlicensed spectrum can improve the coverage of the access network and / or increase the capacity of the access network.

[0058] The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating frequency bands have been identified with the frequency range designations FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). Although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the "sub-6 GHz" band in various documents and articles. A similar naming issue sometimes arises with FR2, which is often (interchangeably) referred to as the "millimeter wave" band in documents and articles, although it is distinct from the extremely high frequency (EHF) band (30 GHz–300 GHz), which is identified as the "millimeter wave" band by the International Telecommunication Union (ITU).

[0059] Frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR research has identified the operating band for these mid-band frequencies as the frequency range designation FR3 (7.125 GHz–24.25 GHz). Frequency bands belonging to FR3 can inherit FR1 characteristics and / or FR2 characteristics, effectively extending the characteristics of FR1 and / or FR2 to mid-band frequencies. Furthermore, higher frequency bands are currently being explored to extend 5G NR operation above 52.6 GHz. For example, three higher operating bands have been identified with the frequency range designations FR4a or FR4-1 (52.6 GHz–71 GHz), FR4 (52.6 GHz–114.25 GHz), and FR5 (114.25 GHz–300 GHz). Each of these higher frequency bands falls within the EHF band.

[0060] With the foregoing in mind, unless otherwise explicitly stated, it should be understood that the term "sub-6 GHz," etc., if used herein, may broadly refer to frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. Furthermore, unless otherwise specifically stated, it should be understood that the term "millimeter wave," etc., if used herein, may broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a, or FR4-1, and / or FR5, or may be within the EHF band.

[0061] Base station 102, whether a small cell 102' or a large cell (e.g., a macro base station), can include and / or be referred to as an eNB, gNodeB (gNB), or another type of base station. Some base stations, such as gNB 180, can operate in traditional sub-6 GHz spectrum, millimeter wave frequencies, and / or near millimeter wave frequencies for communicating with UE 104. When gNB 180 operates in millimeter wave or near millimeter wave frequencies, gNB 180 can be referred to as a millimeter wave base station. Millimeter wave base station 180 can utilize beamforming 182 with UE 104 to compensate for path loss and short range. Base station 180 and UE 104 can each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays to facilitate beamforming.

[0062] Base station 180 may transmit beamformed signals in one or more transmit directions 182′ to UE 104. UE 104 may receive beamformed signals from base station 180 in one or more receive directions 182″. UE 104 may also transmit beamformed signals in one or more transmit directions to base station 180. Base station 180 may receive beamformed signals in one or more receive directions from UE 104. Base station 180 / UE 104 may perform beam training to determine optimal receive and transmit directions for each of base station 180 / UE 104. The transmit and receive directions of base station 180 may be the same or different. The transmit and receive directions of UE 104 may be the same or different.

[0063] EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. MME 162 may communicate with a Home Subscriber Server (HSS) 174. MME 162 is a control node that handles signaling between UE 104 and EPC 160. Generally, MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through Serving Gateway 166, which itself is connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation and other functions. PDN Gateway 172 and BM-SC 170 are connected to IP Services 176. IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), PS streaming services, and / or other IP services. The BM-SC 170 can provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 can serve as the entry point for content providers' MBMS transmissions, can be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and can be used to schedule MBMS transmissions. The MBMS Gateway 168 can be used to distribute MBMS traffic to base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a specific service, and can be responsible for session management (start / stop) and collecting eMBMS-related charging information.

[0064] The core network 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. The AMF 192 may communicate with a unified network communication data management (UDM) 196. The AMF 192 is a control node that handles signaling between the UE 104 and the core network 190. Typically, the AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are transported through the UPF 195. The UPF 195 provides UE IP address allocation and other functions. The UPF 195 is connected to the IP services 197. The IP services 197 may include the Internet, an intranet, an IP multimedia subsystem (IMS), packet switched (PS) stream (PSS) services, and / or other IP services.

[0065] A base station may include and / or be referred to as a gNB, Node B, eNB, access point, base transceiver station, radio base station, radio transceiver, transceiver functionality, basic service set (BSS), extended service set (ESS), transmission reception point (TRP), or some other suitable terminology. Base station 102 provides an access point to EPC 160 or core network 190 for UE 104. Examples of UE 104 include a cellular phone, a smartphone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor / actuator, a display, or any other similarly functional device. Some UEs 104 may be referred to as IoT devices (e.g., a parking meter, a gas pump, a toaster, a vehicle, a heart monitor, etc.). UE 104 may also be referred to as a station, mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile user station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology. In some scenarios, the term UE may also apply to one or more companion devices, such as in a device constellation arrangement. One or more of these devices may access a network together and / or individually.

[0066] Figure 2A is a diagram illustrating an example of a first subframe within a 5G NR frame structure. Figure 2B is a diagram illustrating an example of DL channels within a 5G NR subframe. Figure 2C is a diagram illustrating an example of a second subframe within a 5G NR frame structure. Figure 2D is a diagram illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure can be frequency division duplex (FDD), where for a specific set of subcarriers (carrier system bandwidth), subframes within that set of subcarriers are dedicated to DL or UL, or can be time division duplex (TDD), where for a specific set of subcarriers (carrier system bandwidth), subframes within that set of subcarriers are dedicated to DL and UL. Figure 2A 、 2CIn the example provided, it is assumed that the 5G NR frame structure is TDD, subframe 4 is configured with time slot format 28 (primarily DL), where D is DL, U is UL, and F is flexible between DL / UL, and subframe 3 is configured with time slot format 1 (all UL). Although subframes 3 and 4 are shown with time slot formats 1 and 28, respectively, any particular subframe can be configured with any of the various available time slot formats 0-61. Time slot formats 0 and 1 are DL and UL, respectively. Other time slot formats 2-61 include a mix of DL, UL and flexible symbols. The time slot format is configured for the UE via the received time slot format indicator (SFI) (dynamically via DL control information (DCI), or semi-statically / statically via radio resource control (RRC) signaling). Please note that the description below also applies to the 5G NR frame structure for TDD.

[0067] Figures 2A-2D The frame structure is illustrated, and aspects of the present disclosure may be applicable to other wireless communication technologies that may have different frame structures and / or different channels. A frame (10 ms) may be divided into 10 equally sized subframes (1 ms). Each subframe may include one or more time slots. A subframe may also include mini-slots, which may include 7, 4, or 2 symbols. Each time slot may include 14 or 12 symbols, depending on whether the cyclic prefix (CP) is normal or extended. For a normal CP, each time slot may include 14 symbols, while for an extended CP, each time slot may include 12 symbols. The symbols on the DL may be CP orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also known as single carrier frequency division multiple access (SC-FDMA) symbols) (for power-limited scenarios; limited to single stream transmission). The number of time slots within a subframe is based on the CP and the digital scheme. The digital scheme defines a subcarrier spacing (SCS), and in practice, the symbol length / duration is equal to 1 / SCS.

[0068]

[0069] For normal CP (14 symbols / time slot), different digital schemes with μ from 0 to 4 allow 1, 2, 4, 8, and 16 time slots per subframe, respectively. For extended CP, digital scheme 2 allows 4 time slots per subframe. Therefore, for normal CP and digital scheme μ, there are 14 symbols / time slot and 2 μ timeslot / subframe. The subcarrier spacing can be equal to 2 μ*15kHz, where μ is the digital scheme 0 to 4. Therefore, the subcarrier spacing for digital scheme μ=0 is 15kHz, and the subcarrier spacing for digital scheme μ=4 is 240kHz. The symbol length / duration is inversely proportional to the subcarrier spacing. Figures 2A-2D An example is provided for a normal CP with 14 symbols per slot and a digital scheme μ=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs. Within a frame set, there may be one or more frequency-division multiplexed different bandwidth parts (BWPs) (see Figure 2B ). Each BWP may have a specific number scheme and CP (normal or extended).

[0070] A resource grid can be used to represent the frame structure. Each time slot includes a resource block (RB) (also called a physical RB (PRB)) that extends over 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0071] like Figure 2A As shown, some REs carry reference (pilot) signals (RS) for the UE. RSs can include demodulation RSs (DM-RSs) (indicated as R for one specific configuration, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RSs) used for channel estimation at the UE. RSs can also include beam measurement RSs (BRSs), beam refinement RSs (BRRSs), and phase tracking RSs (PT-RSs).

[0072] Figure 2BAn example of various DL channels within a subframe of a frame is shown. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE comprising six RE groups (REGs), each REG comprising contiguous REs within an OFDM symbol of 12 RBs. The PDCCH within a BWP may be referred to as a control resource set (CORESET). During PDCCH monitoring opportunities on the CORESET, the UE is configured to monitor PDCCH search spaces (e.g., common search space, UE-specific search space) for PDCCH candidates with different DCI formats and different aggregation levels. Additional BWPs may be located at higher and / or lower frequencies within the overall channel bandwidth. The primary synchronization signal (PSS) may be within symbol 2 of specific subframes of a frame. The PSS is used by UE 104 to determine subframe / symbol timing and physical layer identification. The secondary synchronization signal (SSS) may be within symbol 4 of specific subframes of a frame. The UE uses the SSS to determine the physical layer cell identification group number and radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location of the DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also known as an SS block (SSB)). The MIB provides the number of RBs in the system bandwidth and the system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information not sent via the PBCH (such as the system information block (SIB)), and paging messages.

[0073] like Figure 2C As shown, some REs carry DM-RSs for channel estimation at the base station (indicated as R for one specific configuration, but other DM-RS configurations are possible). The UE can send DM-RSs for the physical uplink control channel (PUCCH) and DM-RSs for the physical uplink shared channel (PUSCH). The PUSCH DM-RS can be sent in the first or first two symbols of the PUSCH. The PUCCH DM-RS can be sent in different configurations, depending on whether a short PUCCH or a long PUCCH is sent and on the specific PUCCH format used. The UE can send a sounding reference signal (SRS). The SRS can be sent in the last symbol of the subframe. The SRS can have a comb structure, and the UE can send the SRS on one of the comb structures. The SRS can be used by the base station for channel quality estimation to achieve frequency-dependent scheduling of the UL.

[0074] Figure 2DAn example of various UL channels within a subframe of a frame is shown. The PUCCH may be positioned as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), and hybrid automatic repeat request (HARQ) acknowledgement (ACK) (HARQ-ACK) information (ACK / negative ACK (NACK)) feedback. The PUSCH carries data and may additionally be used to carry buffer status reports (BSRs), power headroom reports (PHRs), and / or UCI.

[0075] Figure 3 3 is a block diagram illustrating an example of a first wireless device configured to exchange wireless communications with a second wireless device. In the illustrated example, the first wireless device may include a base station 310, the second wireless device may include a UE 350, and the base station 310 may communicate with the UE 350 in an access network. Figure 3 As shown, base station 310 includes a transmit processor (TX processor 316), a transceiver 318 including a transmitter 318a and a receiver 318b, antenna 320, a receive processor (RX processor 370), a channel estimator 374, a controller / processor 375, and a memory 376. Example UE 350 includes antenna 352, a transceiver 354 including a transmitter 354a and a receiver 354b, an RX processor 356, a channel estimator 358, a controller / processor 359, a memory 360, and a TX processor 368. In other examples, base station 310 and / or UE 350 may include additional or alternative components.

[0076] In the DL, IP packets from the EPC 160 may be provided to the controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functions. Layer 3 includes the radio resource control (RRC) layer, and layer 2 includes the service data adaptation protocol (SDAP) layer, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, and the medium access control (MAC) layer. The controller / processor 375 provides RRC layer functions associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functions associated with header compression / decompression, security (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; RLC layer functions associated with transmission of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs), resegmentation of RLC data PDUs, and reordering of RLC data PDUs; MAC layer functions associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs to transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0077] The TX processor 316 and the RX processor 370 implement Layer 1 functions associated with various signal processing functions. Layer 1, which includes the physical (PHY) layer, may include error detection on the transmission channel, forward error correction (FEC) encoding / decoding of the transmission channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols can then be divided into parallel streams. Each stream can then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time and / or frequency domain, and then combined using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time-domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine the coding and modulation schemes, as well as for spatial processing. The channel estimates may be derived from a reference signal and / or channel condition feedback transmitted by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318a. Each transmitter 318a may modulate a radio frequency (RF) carrier with a respective spatial stream for transmission.

[0078] At the UE 350, each receiver 354b receives a signal via its respective antenna 352. Each receiver 354b recovers the information modulated onto the RF carrier and provides the information to the RX processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functions associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, they can be combined into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then converts the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols and reference signals on each subcarrier are recovered and demodulated by determining the most likely signal constellation point transmitted by the base station 310. These soft decisions can be based on the channel estimates calculated by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent on the physical channel by base station 310. The data and control signals are then provided to controller / processor 359, which implements layer 3 and layer 2 functionality.

[0079] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.

[0080] Similar to the functions described in conjunction with the DL transmission of the base station 310, the controller / processor 359 provides RRC layer functions associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functions associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functions associated with transmission of upper layer PDUs, error correction through ARQ, concatenation, segmentation and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs to TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0081] Channel estimates derived by the channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by the TX processor 368 to select the appropriate coding and modulation schemes and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354 a. Each transmitter 354 a may modulate an RF carrier with a respective spatial stream for transmission.

[0082] The UL transmission is processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318b receives a signal through its respective antenna 320. Each receiver 318b recovers information modulated onto an RF carrier and provides the information to the RX processor 370.

[0083] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer-readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the UE 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.

[0084] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to Figure 1 Aspects related to the UCI multiplexing component 198.

[0085] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform operations related to Figure 1 199 related aspects of the UCI management component.

[0086] In some examples, a base station may request CSI feedback from a UE. CSI feedback may include periodic CSI reports, semi-persistent CSI reports, and / or aperiodic CSI reports. In some examples, aperiodic CSI (A-CSI) reports may be triggered using an uplink grant and may be sent using an uplink data channel (e.g., PUSCH). However, such A-CSI reports may contain outdated information due to, for example, the frequency with which uplink grants are provided.

[0087] The example techniques disclosed herein enable a UE to provide downlink grant-triggered A-CSI feedback on an uplink control channel (e.g., PUCCH). Providing A-CSI feedback using PUCCH can be faster than A-CSI reporting on PUSCH and can provide more up-to-date CSI information to the base station. Providing A-CSI feedback using PUCCH can also reduce latency and increase reliability.

[0088] In some examples, a downlink grant can trigger both CSI feedback and HARQ feedback. For example, a downlink grant can schedule a PDSCH, which can trigger the UE to provide HARQ feedback. A downlink grant can also schedule a CSI-RS that triggers the UE to provide aperiodic CSI feedback.

[0089] Figure 4 4 is a diagram illustrating example timelines 400, 450 for downlink grant-triggered aperiodic CSI feedback according to various aspects of the present disclosure. In the illustrated example, the example timelines 400, 450 depict communications between a base station 401 (e.g., base station 102 / 180 and / or base station 310) and a UE 403 (e.g., UE 104 and / or UE 350).

[0090] In the example timelines 400, 450, the base station 401 may send a downlink grant 402 to the UE 403 at time T0. The downlink grant 402 may schedule the PDSCH 404 at time T3 and may also trigger HARQ feedback from the UE 403 at time T5. The downlink grant 402 may also trigger the CSI-RS 408 received by the UE 403 at time T2. The UE 403 may perform measurements based on the CSI-RS 408 and generate CSI feedback (e.g., a CSI report) to provide to the base station 401.

[0091] In some examples, base station 401 can instruct UE 403 to use the same PUCCH resources to send HARQ feedback and CSI feedback. For example, in the first example timeline 400, downlink grant 402 can schedule UE 403 to use PUCCH resources 406 to send HARQ feedback and CSI feedback associated with downlink grant 402 at time T5.

[0092] In some examples, base station 401 can instruct UE 403 to use different PUCCH resources to send HARQ feedback and CSI feedback. For example, in the second example timeline 450, downlink grant 402 can schedule UE 403 to send HARQ feedback at time T5 using first PUCCH resource 452 and can schedule UE 403 to send CSI feedback at time T6 using second PUCCH resource 454.

[0093] like Figure 4 As shown, the offset (or time gap) between the downlink grant 402 (at time T1) and the PDSCH 404 (at time T3) can be referred to as the K0 offset. The offset (or time gap) between the PDSCH 404 (at time T3) and the PUCCH resources containing HARQ feedback (at time T5) can be referred to as the K1 offset. The offset (or time gap) between the downlink grant 402 (at time T1) and the PUCCH resources containing CSI feedback (at time T5 in the first example timeline 400 and at time T6 in the second example timeline 450) can be referred to as the z offset. The offset (or time gap) between the CSI-RS 408 (at time T2) and the PUCCH resources containing CSI feedback can be referred to as the z' offset.

[0094] Although the second example timeline 450 depicts the first PUCCH resource 452 containing HARQ feedback occurring in the time domain before the second PUCCH resource 454 containing CSI feedback, in other examples, the second PUCCH resource 454 containing CSI feedback may occur earlier than the first PUCCH resource 452 containing HARQ feedback in the time domain.

[0095] In some examples, UE 403 may receive two or more downlink grants, each of which triggers corresponding aperiodic CSI feedback. In some examples, multiple feedbacks may be scheduled for the same timeslot. However, UE 403 may be able to send one PUCCH or two PUCCHs in the same timeslot. In addition, UE 403 may be configured to avoid sending two transmissions that overlap in time. When two resources occupy the same symbol in a timeslot, the two resources are said to be in conflict.

[0096] In some examples, the base station 401 may use DCI to indicate the PUCCH resources for aperiodic feedback. For example, the base station 401 may use different DCI to send each downlink grant. In some such examples, the DCI may indicate to the UE 403 the time slot for sending the corresponding aperiodic CSI feedback. For example, the base station 401 may provide a z offset and / or a z' offset corresponding to the PUCCH resource containing the CSI feedback. When multiple aperiodic CSI reports are scheduled for the same time slot (or sub-time slot), the UE 403 may multiplex the individual CSI reports into the same PUCCH resource. After performing the multiplexing, the UE 403 may determine which PUCCH resource to use to send the (multiplexed) aperiodic CSI report. In some examples, the UE 403 may use the last PDCCH (e.g., the last DCI) to determine the PUCCH resource for sending the (multiplexed) aperiodic CSI report. In some examples, the order of the PDCCH may be defined by the frequency domain and the time domain.

[0097] Figure 5 An example timeline 500 is depicted, including time slots 510 in the time domain and the frequency domain. The order of PDCCH resources can be defined based on the time domain or the frequency domain. For example, in some examples, PDCCH resources can overlap in the time domain. In the illustrated example, timeline 500 includes a first PDCCH resource 502 and a second PDCCH resource 504 that overlap in time. In some such examples, the UE can determine the PDCCH resource with the largest cell index as the last PDCCH.

[0098] In some examples, PDCCH resources may overlap in the frequency domain. For example, the first PDCCH resource 502 and the third PDCCH resource 506 overlap in the frequency domain. In some such examples, the UE may determine that the PDCCH resource that occurs later in time (e.g., the third PDCCH resource 506) is the last PDCCH. The UE may then send aperiodic CSI feedback after the last PDCCH identified.

[0099] As described, in some examples, the UE may determine to multiplex two or more aperiodic CSI reports into a single PUCCH resource. However, when multiplexing two or more aperiodic CSI reports, it may be beneficial to track the order of the aperiodic CSI reports. In some such examples, the base station may utilize a downlink allocation indication (DAI) to track the order of the aperiodic CSI reports. The DAI may include two indicators, including a counter DAI and a total number DAI. The total number DAI may indicate the total number of aperiodic CSI reports scheduled for the time slot, and the counter DAI may indicate the sequence number (or index) of a particular aperiodic CSI report. For example, a downlink grant containing a DAI value of (2, 3) may indicate that there are a total of three aperiodic CSI reports scheduled for the time slot and the corresponding aperiodic CSI report is the second aperiodic CSI of the three aperiodic CSI reports. In some examples, the counter DAI may indicate the index of the A-CSI report in the A-CSI codebook used to multiplex the A-CSI report, and the total number DAI may indicate the total number of A-CSI reports to be multiplexed in the PUCCH resource.

[0100] In some examples, the DAI can enable the base station to track the number of aperiodic CSI reports across different component carriers. In some such examples, the payload size of each aperiodic CSI report can be fixed across component carriers. For example, for CQI information, the aperiodic CSI report can be fixed to 4 bits. In some examples, the generation of multiplexed CSI reports can be based on a pseudocode, such as a pseudocode used for HARQ-ACK codebook determination.

[0101] However, utilizing DAI to track aperiodic CSI reporting may result in increased signaling overhead. For example, the DCI may include additional bits to indicate a separate PUCCH resource for aperiodic CSI reporting. For example, the aperiodic CSI request may include one to five bits, the PUCCH resource indicator (PRI) may include three bits, the DAI may include four bits (e.g., two bits for a counter DAI and two bits for a total DAI), and any additional bits (e.g., X bits) indicating an offset (e.g., z offset and / or z' offset) from the CSI-RS to the PUCCH resource containing the aperiodic CSI feedback.

[0102] Figure 6AAn example process 600 is illustrated for a UE 632 to receive multiple downlink grants while employing carrier aggregation, as presented herein. When employing carrier aggregation, the UE 632 may receive multiple downlink grants on multiple component carriers (in the same timeslot or the same monitoring opportunity), and each downlink grant may trigger a corresponding aperiodic CSI report. In the illustrated example, the UE 632 receives three downlink grants 602, 604, 606, which trigger three CSI-RSs 603, 605, 607, respectively. The three CSI-RSs 603, 605, 607 trigger three corresponding aperiodic CSI reports, which the UE 632 multiplexes into one PUCCH resource 608 during timeslot 610. In the illustrated example, each downlink grant 602, 604, 606 includes a DAI that includes a counter DAI and a total DAI.

[0103] Specifically, at time T1, base station 630 provides a first downlink grant 602 that triggers a first CSI-RS 603 and a corresponding aperiodic CSI report for UE 632 to transmit to base station 630. In the illustrated example, DCI 620 associated with first downlink grant 602 may include an offset field 622 that provides an offset (e.g., a z offset and / or a z' offset) for scheduling the transmission of the corresponding aperiodic CSI report during time slot 610. DCI 620 may also include DAI (1, 1) indicating that at time T1, there is one scheduled aperiodic CSI report during time slot 610 and that the aperiodic CSI report generated in response to first CSI-RS 603 is an aperiodic CSI report. For example, DCI 620 may include a counter DAI field 624 indicating a sequence number of the corresponding aperiodic CSI report and a total number DAI field 626 indicating the total number of aperiodic CSI reports scheduled for time slot 610. The first downlink grant 602 may also indicate the corresponding PUCCH resources for the UE to use for sending the corresponding aperiodic CSI report. For example, the DCI 620 may include a PRI field 628 that indicates the PUCCH resources (e.g., PUCCH resources 608) for the UE 632 to use for sending the corresponding aperiodic CSI report.

[0104] like Figure 6A As shown, at time T2, base station 630 sends a second downlink grant 604 and a third downlink grant 606. The second downlink grant 604 triggers a second CSI-RS 605 and a corresponding aperiodic CSI report for UE 632 to send to base station 630. In a similar manner, the third downlink grant 606 triggers a third CSI-RS 607 and a corresponding aperiodic CSI report for UE 632 to send to base station 630. Figure 6AAs shown, three respective aperiodic CSI reports are each scheduled for the same time slot 610. At time T2, the total number of aperiodic CSI reports scheduled for time slot 610 is three aperiodic CSI reports, and therefore, the base station 630 updates the total number DAI value for the second downlink grant 604 and the third downlink grant 606 to three. For example, the total number DAI field of the DCI associated with the second downlink grant 604 and the third downlink grant 606 may include a value of "3." The counter DAI field of the DCI associated with the second downlink grant 604 may include a value of "2," indicating that the corresponding aperiodic CSI report is the second of the three aperiodic CSI reports scheduled for time slot 610. Similarly, the counter DAI field of the DCI associated with the third downlink grant 606 may include a value of "3," indicating that the aperiodic CSI report corresponding to the third downlink grant 606 is the third of the three aperiodic CSI reports scheduled for time slot 610. In some examples, the UE 632 may determine to use the PUCCH resources indicated by the PRI field of the last downlink grant (eg, the third downlink grant 606) to send the multiplexed aperiodic CSI report.

[0105] In some examples, UE 632 can multiplex aperiodic CSI reports for the same carrier in the same PUCCH. For example, base station 630 can trigger multiple CSI-RSs, and the interference level on different CSI-RSs can be different. By providing CSI feedback, UE 632 can indicate the interference level within that particular CSI-RS transmission.

[0106] For example, Figure 6B An example process 650 is illustrated for a UE 632 to receive multiple downlink grants for the same carrier 651, as presented herein. Figure 6B In the example of FIG, , UE 632 receives a first downlink grant 652 at time T1, which triggers a first CSI-RS 653 and a corresponding aperiodic CSI report for UE 632 to transmit to base station 630 using PUCCH resources 656. The DCI associated with the first downlink grant 652 may include a DAI field including a counter DAI field 660 and a total DAI field 662. Figure 6B As shown, at time T1, there is one aperiodic CSI report scheduled for time slot 658. As a result, the base station 630 may set the DAI fields 660, 662 of the DCI of the first downlink grant 652 to (1, 1).

[0107] In a similar manner, UE 632 may receive a second downlink grant 654 at time T2, which triggers a second CSI-RS 655 and a corresponding aperiodic CSI report for UE 632 to transmit to base station 630. The DCI associated with the second downlink grant 654 may include a DAI field including a counter DAI field 670 and a total DAI field 672. Figure 6B As shown, at time T2, there are two aperiodic CSI reports scheduled for time slot 658. As a result, the base station 630 can set the DAI fields 670, 672 of the DCI of the second downlink grant 654 to (2, 2).

[0108] In some examples, the base station may use RRC signaling to indicate PUCCH resources for aperiodic feedback. Figure 7 An example timeline 700 is illustrated in which PUCCH resources for aperiodic CSI reporting are indicated via RRC signaling. For example, a base station may use RRC signaling to configure a CSI reporting configuration set 704 for a UE, which includes one or more CSI reporting configurations 704a, 704b, ..., 704n. Each CSI reporting configuration in the CSI reporting configuration set 704 may define how the UE calculates a corresponding CSI report. For example, a first CSI reporting configuration 704a may instruct the UE to calculate a CSI report that includes a channel quality indicator, a rank indicator, and a precoding matrix indicator from a CSI reference signal measurement, and a second CSI reporting configuration 704b may instruct the UE to calculate a CSI report that includes "in sync" and "out of sync" indicators for radio link failure detection based on the CSI reference signal, etc.

[0109] In some examples, each CSI reporting configuration in the CSI reporting configuration set 704 can be associated with slot offset and PUCCH resource information 706 including one or more slot offsets and PUCCH resource configurations 706a, 706b, ... 706n. For example, a first CSI reporting configuration 704a can be associated with a first slot offset and a PUCCH resource configuration 706a including a corresponding first slot offset (e.g., a z offset and / or a z' offset) and a first PUCCH resource, a second CSI reporting configuration 704b can be associated with a second slot offset and a PUCCH resource configuration 706b including a corresponding second slot offset and a second PUCCH resource, and so on.

[0110] In some such examples where the UE is configured with a CSI reporting configuration set 704, the base station may indicate an aperiodic CSI request 702 received by the UE. The aperiodic CSI request 702 may be triggered by a downlink grant. The base station may send the aperiodic CSI request 702 using DCI. In some examples, the aperiodic CSI request 702 may indicate a specific CSI reporting configuration in the CSI reporting configuration set 704. For example, in Figure 7 In the illustrated example of FIG, the aperiodic CSI request 702 may include an indicator 703 identifying a second CSI reporting configuration 704b. The UE may use the second CSI reporting configuration 704b to calculate the requested CSI report. The UE may then use the corresponding second slot offset and PUCCH resource configuration 706b to determine the slot offset and PUCCH resource for sending the corresponding CSI report.

[0111] It can be understood that when the base station configures the CSI report configuration set 704 for the UE, the base station can avoid separately providing a time slot offset and PUCCH resource for each aperiodic CSI request, because the time slot offset and PUCCH resource are associated with the CSI report configuration indicated by the aperiodic CSI request using DCI. In addition, if the base station indicates a second aperiodic CSI request (for example, another downlink grant that triggers CSI feedback), the base station can associate the second aperiodic CSI request with a different CSI report configuration in the CSI report configuration set 704, and the different CSI report configurations are associated with corresponding time slot offsets and PUCCH resource information 706.

[0112] although Figure 7 The illustrated example depicts a CSI reporting configuration set 704 including multiple CSI reporting configurations 704a, 704b, ... 704n. In other examples, the CSI reporting configuration set 704 may include any suitable number of CSI reporting configurations, such as one CSI reporting configuration, two CSI reporting configurations, etc.

[0113] Additionally, in some examples, the respective slot offsets and PUCCH resource information 706 corresponding to different CSI reporting configurations in the CSI reporting configuration set 704 may result in multiple CSI reports being scheduled for the same slot. In some such examples, the UE may multiplex two or more CSI reports scheduled for the same slot into a single PUCCH resource.

[0114] As described herein, in some examples, the UE may be scheduled to send multiple non-periodic CSI reports in a time slot. However, the UE may be limited to sending one PUCCH resource or two PUCCH resources within a time slot. In addition, the UE may be prevented (for example, due to hardware capabilities, etc.) from sending two PUCCH resources that overlap in time. In some examples, the UE may be configured with parameters that enable CSI multiplexing. For example, the base station may provide a multiplexed CSIPUCCH resource list ("multi-CSI-PUCCH-resourceList") to the UE. The multiplexed CSIPUCCH resource list may indicate that the UE may be configured for one or more PUCCH resources for multiplexing. For the transmission timing of multiple CSI reports, the multiplexed CSIPUCCH resource list may provide corresponding PUCCH resources. For example, the UE may combine multiple CSI reports in the resources in the resource set provided by the multiplexed CSIPUCCH resource list. However, in some examples, the base station may give up providing (for example, not providing) the multiplexed CSIPUCCH resource list to the UE.

[0115] Figure 8A and Figure 8B An example time slot is depicted in which multiple PUCCH resources are scheduled for transmission by UE 800 in accordance with one or more techniques disclosed herein. Figure 8A In some examples, the UE 800 may be configured to abandon CSI multiplexing. For example, the UE 800 may not be provided and / or configured with a list of multiplexed CSI PUCCH resources. Additionally or alternatively, the UE 800 may be configured so that PUCCH resources do not overlap in time within the same time slot. In some such examples, the UE 800 may select two non-overlapping PUCCH resources with the highest priority.

[0116] exist Figure 8A In the first example, UE 800 may be scheduled to transmit three non-overlapping PUCCH resources in the same time slot 802. For example, UE 800 may be scheduled to transmit a first PUCCH resource 804 having the highest priority (e.g., priority one), a second PUCCH resource 806 having the second highest priority (e.g., priority two), and a third PUCCH resource 808 having the third highest priority (e.g., priority three). Figure 8AIn the first example, the three PUCCH resources 804, 806, and 808 do not overlap in time. Therefore, the UE 800 may select the two non-overlapping PUCCH resources with the highest priority for transmission to the base station 801. For example, the UE 800 may select the first PUCCH resource 804 and the second PUCCH resource 806 for transmission to the base station 801. The UE 800 may discard the remaining PUCCH resources (e.g., the third PUCCH resource 808).

[0117] exist Figure 8A In the first example, UE 800 may or may not be configured with a multiplexing CSIPUCCH resource list. Figure 8A In a second example, UE 800 may not be configured with a multiplexed CSI PUCCH resource list and may be scheduled to transmit three PUCCH resources during time slot 802, and two of the three PUCCH resources may overlap in time. For example, UE 800 may be scheduled to transmit a first PUCCH resource 804, a third PUCCH resource 808, and a fourth PUCCH resource 810. The fourth PUCCH resource 810 may have the lowest priority (e.g., a priority of four). In some such examples, UE 800 may first select the PUCCH resource corresponding to the CSI report with the highest priority. Figure 8A In the second example, the PUCCH resource corresponding to the CSI report with the highest priority is the first PUCCH resource 804. The UE 800 may then select a second PUCCH resource for transmission by identifying one or more PUCCH resources that do not overlap with the first PUCCH resource 804. The UE 800 may then select the PUCCH resource with the highest remaining priority from the identified one or more PUCCH resources. Figure 8A As shown, the first PUCCH resource 804 and the fourth PUCCH resource 810 overlap in time. Therefore, the UE 800 may abandon the fourth PUCCH resource 810 and select the PUCCH resource with the highest remaining priority (e.g., the third PUCCH resource 808). The UE may then discard the remaining PUCCH resources (e.g., the fourth PUCCH resource 810).

[0118] exist Figure 8A In the example, the priority of PUCCH resources can be defined based on the CSI report type (for example, non-periodic CSI report has higher priority than semi-persistent CSI report, and semi-persistent CSI report has higher priority than periodic CSI report), cell identifier and CSI report configuration identifier.

[0119] Still a reference Figure 8AFor example, in some examples, it may not be reasonable to discard the aperiodic CSI report. For example, the base station 801 may schedule the aperiodic CSI report to receive the latest CSI information from the UE 800. However, if more than two aperiodic CSI reports are scheduled for the same time slot, the UE 800 may discard at least one of the aperiodic CSI reports because the UE 800 may be limited to sending one PUCCH resource or two PUCCH resources in a time slot. To prevent the aperiodic CSI report from being discarded, the base station 801 may be configured to schedule no more than two aperiodic CSI reports in the same time slot. In addition, the base station 801 may be configured to schedule one or two aperiodic CSI reports in the same time slot so that the two aperiodic CSI reports do not overlap in time (e.g., do not overlap in time in the same time slot).

[0120] For example, in Figure 8A In the first example, the base station 801 may schedule PUCCH resources such that no more than two of the first PUCCH resource 804, the second PUCCH resource 806, and the third PUCCH resource 808 correspond to aperiodic CSI reports. Figure 8A In the second example, the base station 801 may schedule PUCCH resources such that no more than two of the first PUCCH resource 804, the third PUCCH resource 808, and the fourth PUCCH resource 810 correspond to aperiodic CSI reporting. In addition, since the first PUCCH resource 804 and the fourth PUCCH resource 810 overlap in time, the base station 801 may schedule PUCCH resources such that neither the first PUCCH resource 804 nor the fourth PUCCH resource 810 corresponds to an aperiodic CSI report.

[0121] exist Figure 8B In the example of 8B, the UE 800 may be configured with a multiplexed CSIPUCCH resource list, and at least two PUCCH resources may overlap in time within a time slot. In some such examples, the UE 800 may multiplex the non-periodic CSI report into a single PUCCH resource and use resources from the multiplexed CSIPUCCH resource list to send the PUCCH resource. For example, the UE 800 may be scheduled to send a first PUCCH resource 852, a second PUCCH resource 854, and a third PUCCH resource 856 during time slot 850. In the example of 8B, the UE 800 is configured with a multiplexed CSIPUCCH resource list 870, which indicates one or more PUCCH resources (e.g., "PUCCH_1", ... "PUCCH_N") that the UE 800 uses for multiplexing. As Figure 8BAs shown, the second PUCCH resource 854 and the third PUCCH resource 856 overlap in time. Therefore, the UE 800 can multiplex the three PUCCH resources 852, 854, 856 scheduled for time slot 850 into a multiplexed PUCCH 858 ("MUX PUCCH"). The multiplexed PUCCH 858 can be selected from a multiplexed CSI PUCCH resource list 870. In some examples, the UE 800 can select the multiplexed PUCCH 858 based on the payload size of the multiplexed aperiodic CSI report. For example, if the payload size of the multiplexed aperiodic CSI report is within a first range (e.g., 10 to 20 bits), the UE 800 can select the first multiplexed PUCCH resource, if the payload size of the multiplexed aperiodic CSI report is within a second range (e.g., 21 to 30 bits), the UE 800 can select the second multiplexed PUCCH resource, and so on.

[0122] As described herein, when two or more aperiodic CSI reports are multiplexed, it may be beneficial to track the order of the aperiodic CSI reports. In some such examples, the base station 801 may utilize the DAI to track the order of the aperiodic CSI reports. For example, the base station 801 may use the DCI associated with each downlink grant that triggers each aperiodic CSI report to send a counter DAI and a total DAI, and schedule each aperiodic CSI report within the time slot 850.

[0123] In addition, base station 801 may provide an indication of the multiplexing behavior of the PUCCH resources scheduled within time slot 850. For example, base station 801 may indicate whether aperiodic CSI multiplexing is scheduled. Base station 801 may provide an indication of the multiplexing behavior to prevent erroneous communication between base station 801 and UE 800. For example, due to an error in transmission, UE 800 may miss a CSI-RS and, therefore, may be unable to calculate an aperiodic CSI report corresponding to one of PUCCH resources 852, 854, 856 of time slot 850. For example, UE 800 may miss the CSI-RS associated with the second PUCCH resource 854. In some such examples, UE 800 may determine that two PUCCH resources (e.g., first PUCCH resource 852 and third PUCCH resource 856) are scheduled within time slot 850, and because the two PUCCH resources 852, 856 do not overlap in time within time slot 850, UE 800 may send the two corresponding aperiodic CSI reports without multiplexing. However, when the base station 801 schedules three aperiodic CSI reports for the timeslot 850, the base station 801 may expect multiplexed CSI reports (e.g., multiplexing PUCCH 858). Therefore, to avoid this situation, the base station 801 may provide a multiplexing behavior indication indicating whether the UE 800 is to perform aperiodic CSI multiplexing for the timeslot.

[0124] In some examples, the base station 801 may provide a multiplexing behavior indication in a multiplexing field of the DCI. For example, the DCI 860 may correspond to a downlink grant that triggers an aperiodic CSI report associated with the first PUCCH resource 852. The DCI 860 may include at least one of a counter DAI field 862 indicating the sequence number of the corresponding aperiodic CSI report and a total number DAI field 864 indicating the total number of aperiodic CSI reports scheduled for the time slot 850. For example, the DAI fields 862, 864 of the DCI 860 corresponding to the downlink grant of the first PUCCH resource 852 may be set to (1, 3), indicating that the aperiodic CSI report corresponding to the first PUCCH resource 852 is the first of three aperiodic CSI reports scheduled for the time slot 850. The DCI 860 may also include a multiplexing field 866 indicating the multiplexing behavior of the time slot 850. For example, the base station 801 may set the multiplexing field 866 to a first value (e.g., "0") to indicate no multiplexing, and may set the multiplexing field 866 to a second value (e.g., "1") to indicate multiplexing. However, adding the multiplexing field 866 to the DCI 860 results in a one-bit overhead.

[0125] In some examples, the base station 801 may use the DAI field of the DCI to provide an indication of multiplexing behavior. For example, the base station 801 may set the total DAI field 864 of the DCI 860 to a value of "00" to indicate no multiplexing. Thus, if the value of the total DAI field 864 is set to a value other than "00," the UE 800 may determine that multiplexing is being performed.

[0126] However, in some examples, a value of "00" for the total number DAI field 864 may indicate that the UE 800 performs multiplexing of 4, 8, etc., aperiodic CSI reports. For example, although the total number DAI field 864 may be two bits, the total number of aperiodic CSI reports scheduled for one time slot may be more than four. In some such examples, the UE 800 may use the counter DAI field 862 to determine whether a value of "00" for the total number DAI field 864 corresponds to no multiplexing or to multiplexing of 4, 8, etc., aperiodic CSI reports. For example, when the total number DAI field 864 is set to "00" and the counter DAI field 862 is set to "01," the UE 800 may determine that a value of "00" for the total number DAI field 864 corresponds to no multiplexing. Otherwise, if the total DAI field 864 is set to "00" and the counter DAI field 862 is set to a value other than "01", the UE 800 can determine that the "00" value of the total DAI field 864 corresponds to multiplexing 4, 8, etc. non-periodic CSI reports.

[0127] If combined Figure 4 As described, in some examples, a downlink grant may trigger aperiodic CSI feedback and HARQ feedback in separate PUCCH resources (eg, as shown in the second example timeline 450). Figure 9 Illustrated is a sequence 900 of multiplexing of PUCCH resources within a time slot according to the teachings disclosed herein. At time T1, a UE 920 may determine that there are multiple PUCCH resources scheduled for transmission during a time slot 901. For example, the UE 920 may determine that there are a first A-CSI PUCCH resource 902, a second A-CSIPUCCH resource 904, and a HARQ-ACK PUCCH resource 906 scheduled for transmission during the time slot 901. Using the techniques disclosed herein, the UE 920 may determine to multiplex the A-CSIPUCCH resources 902, 904 into a single multiplexed A-CSIPUCCH resource 908 ("MUX A-CSIPUCCH"). Figure 9As shown, at time T2, time slot 901 may contain multiplexed A-CSI PUCCH resources 908 and HARQ-ACK PUCCH resources 906. In some examples, UE 920 may have the capability to transmit HARQ-ACK PUCCH resources 906 and multiplexed A-CSI PUCCH resources 908. For example, when PUCCH resources 906, 908 do not overlap in the time domain, UE 920 may have the capability to transmit PUCCH resources 906, 908. However, if UE 920 determines that PUCCH resources 906, 908 overlap in time, UE 920 may determine to multiplex PUCCH resources 906, 908 into a single multiplexed A-CSI and HARQ-ACK PUCCH resource 910. Figure 9 As shown, at time T3, slot 901 may contain multiplexed A-CSI and HARQ-ACK PUCCH resources 910. UE 920 may then transmit a single PUCCH resource (e.g., multiplexed A-CSI and HARQ-ACK PUCCH resource 910) containing HARQ feedback and aperiodic CSI feedback.

[0128] Although Figure 9 Examples include a single HARQ-ACK PUCCH resource 906, and other examples may include any suitable number of HARQ-ACK PUCCH resources, such as two resources or three resources. Thus, it will be appreciated that the HARQ-ACK PUCCH resource 906 may correspond to a single HARQ-ACK PUCCH resource scheduled for the time slot 901, or may correspond to a multiplexed HARQ-ACK PUCCH resource based on multiple HARQ-ACK PUCCH resources scheduled to be transmitted during the time slot 901.

[0129] Figure 10 A diagram is shown including multiple downlink grants that trigger separate PUCCH resources for sending aperiodic CSI feedback and HARQ feedback according to the teachings disclosed herein. Figure 10 The first downlink grant 1002 includes triggering a first CSI-RS 1004, which causes the UE 1030 to calculate a CSI report and provide an aperiodic CSI feedback 1006. Using the techniques disclosed herein, the UE 1030 may determine to use a first PUCCH resource 1008 for sending the aperiodic CSI feedback 1006. It will be appreciated that the aperiodic CSI feedback 1006 may correspond to a single CSI report or may correspond to multiplexed CSI reports, e.g., Figure 9 Multiplexing CSI reporting of multiplexing A-CSI PUCCH resources 908.

[0130] Figure 10Also included is a second downlink grant 1012 that triggers a second CSI-RS 1014 and also triggers the UE 1030 to provide HARQ feedback 1016. Figure 10 As shown, UE 1030 may determine to use second PUCCH resource 1018 to send HARQ feedback 1016. It will be appreciated that HARQ feedback 1016 may correspond to a single HARQ feedback or may correspond to multiplexed HARQ feedback.

[0131] like Figure 10 As shown, the two PUCCH resources 1008 and 1018 overlap at least partially in time. As a result, the UE 1030 can determine to multiplex the aperiodic CSI feedback 1006 and the HARQ feedback 1016 into the multiplexed aperiodic CSI and HARQ feedback 1020. The UE 1030 can then determine which PUCCH resource to use to transmit the multiplexed aperiodic CSI and HARQ feedback 1020.

[0132] exist Figure 10 In the example of , each downlink grant 1002, 1012 may be associated with a corresponding DCI 1050 comprising a plurality of fields. For example, Figure 10 The DCI 1050 includes two PRI fields 1053 (e.g., a HARQ PRI field 1052 and a CSI PRI field 1054), two HARQ DAI fields 1057 (e.g., a HARQ counter DAI field 1056 ("C DAI") and a HARQ total DAI field 1058 ("T DAI")), and two CSI DAI fields 1061 (e.g., a CSI counter DAI field 1060 ("CDAI") and a CSI total DAI field 1062 ("T DAI")). The two PRI fields 1052 and 1054 can instruct the UE 1030 to use specific PUCCH resources when returning their respective feedback. For example, when UE 1030 is sending HARQ feedback, UE 1030 may use the PUCCH resources indicated by the HARQ PRI field 1052 to send HARQ feedback, and when UE 1030 is sending aperiodic CSI feedback, UE 1030 may use the PUCCH resources indicated by the CSI PRI field 1054 to send aperiodic CSI feedback.

[0133] exist Figure 10 In the example of , base station 1032 can use DCI to indicate PUCCH resources for feedback. Figure 5 、 6AAs described in 6B, when DCI is used to indicate PUCCH resources for feedback, the UE 1030 may use the last PDCCH to determine the PUCCH resources for transmitting multiplexed aperiodic CSI and HARQ feedback 1020. For example, the UE 1030 may first determine the last PDCCH based on its appearance in the time domain. Figure 10 In the example of FIG. 1 , UE 1030 may determine that the second downlink grant 1012 is the last PDCCH. UE 1030 may then determine which type of feedback is scheduled by the last PDCCH. For example, UE 1030 may determine that the second downlink grant 1012 schedules HARQ feedback 1016. UE 1030 may then use a PRI for the determined feedback provided by the last PDCCH. For example, UE 1030 may determine to use the PUCCH resource indicated by the HARQ PRI field 1052 of the DCI 1050 corresponding to the second downlink grant 1012. For example, UE 1030 may determine to use the second PUCCH resource 1018 to transmit multiplexed aperiodic CSI and HARQ feedback 1020.

[0134] like Figure 10 As shown, DCI 1050 includes a HARQ DAI field 1057 and a CSI DAI field 1061 to facilitate multiplexing of HARQ feedback and CSI feedback by UE 1030. In some examples, UE 1030 can separately determine a HARQ-ACK codebook 1021 and an aperiodic CSI codebook 1022, and then concatenate the two corresponding codebooks 1021 and 1022 when transmitting the multiplexed aperiodic CSI and HARQ feedback 1020. For example, UE 1030 can use the value of the HARQ counter DAI field 1056 and the value of the HARQ total DAI field 1058 to determine the size of the HARQ-ACK codebook 1021. UE 1030 can also use the value of the CSI counter DAI field 1060 and the value of the CSI total DAI field 1062 to determine the size of the aperiodic CSI codebook 1022. In some examples, UE 1030 can then select PUCCH resources based on the size of the concatenated codebooks 1021 , 1022 .

[0135] Figure 11 A diagram is illustrated including multiple downlink grants that trigger separate PUCCH resources for sending aperiodic CSI feedback and HARQ feedback according to the teachings disclosed herein. Figure 11 In the example of FIG, the PUCCH resource for sending aperiodic CSI feedback is indicated by the base station 1132 using RRC signaling, such as in combination with Figure 7For example, the base station 1132 may configure a CSI reporting configuration set 704 for the UE 1130, wherein each CSI reporting configuration is associated with a corresponding time slot offset and PUCCH resource. A downlink grant requesting aperiodic CSI feedback may then identify the CSI reporting configuration, and the UE 1130 may use the configuration to identify the corresponding time slot offset and PUCCH resource for sending the corresponding aperiodic CSI feedback.

[0136] exist Figure 11 In the example of FIG. 1 , a first downlink grant 1102 may trigger a first CSI-RS 1104, which causes the UE 1130 to calculate a CSI report and provide an aperiodic CSI feedback 1106. Using the techniques disclosed herein, the UE 1130 may determine to use a first PUCCH resource 1108 for sending the aperiodic CSI feedback 1106. It will be appreciated that the aperiodic CSI feedback 1106 may correspond to a single CSI report or may correspond to multiplexed CSI reports, e.g., corresponding to Figure 9 Multiplexing of A-CSI PUCCH resources 908 and multiplexing of CSI reporting.

[0137] Figure 11 Also included is a second downlink grant 1112 that triggers a second CSI-RS 1114 and also triggers the UE 1130 to provide HARQ feedback 1116. Figure 11 As shown, UE 1130 may determine to use a second PUCCH resource 1118 to send HARQ feedback 1116 .

[0138] Similar to Figure 10 For example, in Figure 11 In the illustrated example of , UE 1130 may determine that two PUCCH resources 1108, 1118 at least partially overlap in the time domain, and therefore may determine to multiplex the aperiodic CSI feedback 1106 and the HARQ feedback 1116 into a single multiplexed aperiodic CSI and HARQ feedback 1120. UE 1130 may then determine which PUCCH resource to use to transmit the multiplexed aperiodic CSI and HARQ feedback 1120.

[0139] exist Figure 11In the example of FIG1 , since the PUCCH resource used for aperiodic CSI feedback is RRC-configured (e.g., via a CSI reporting configuration set), the DCI 1150 associated with the downlink grant may include one PRI indicated by the HARQ PRI field 1152. As a result, there is only one PUCCH resource that the base station 1132 can use to indicate the transmission of the multiplexed aperiodic CSI and HARQ feedback 1120. That is, since the PUCCH resource used for aperiodic CSI feedback may be unchangeable, the base station 1132 may be limited to using the HARQ PRI field 1152 to indicate to the UE 1130 which PUCCH resource to use to transmit the multiplexed aperiodic CSI and HARQ feedback 1120. Therefore, when scheduling aperiodic CSI feedback and HARQ feedback using separate PUCCH resources in the same time slot, the base station 1132 can be configured to send the downlink grant scheduling HARQ feedback to arrive at the UE 1130 later in time than (e.g., after) the downlink grant scheduling aperiodic CSI feedback. Figure 11 In the example of , the base station 1132 can be configured so that the second downlink grant 1112 triggering the HARQ feedback 1116 arrives at the UE 1130 after the first downlink grant 1102 triggering the aperiodic CSI feedback 1106 .

[0140] In some examples, the DCI 1150 associated with the downlink grant may also include a multiplexing field 1154 ("MUX"). The multiplexing field 1154 may indicate to the UE 1130 whether to multiplex the HARQ feedback with the aperiodic CSI feedback. For example, when the UE 1130 does not multiplex the HARQ feedback with the aperiodic CSI feedback, the multiplexing field 1154 may include a first value (e.g., "0"), and when the UE 1130 is to multiplex the HARQ feedback with the aperiodic CSI feedback, the multiplexing field 1154 may include a second value (e.g., "1").

[0141] As will be appreciated, base station 1132 may include a multiplexing field 1154 in DCI 1150 to provide an indication of the multiplexing behavior (e.g., HARQ feedback and aperiodic CSI feedback) of the PUCCH resources within a time slot. Base station 1132 may provide an indication of the multiplexing behavior (e.g., the value of multiplexing field 1154) to prevent erroneous communication between base station 1132 and UE 1130. For example, due to a transmission error, UE 1130 may miss a downlink grant and, therefore, may not calculate an aperiodic CSI report corresponding to one of the PUCCH resources of a time slot. By including multiplexing field 1154, base station 1132 and UE 1130 may avoid a scenario in which UE 1130 may determine not to multiplex HARQ feedback and aperiodic CSI feedback based on the PUCCH resources determined by UE 1130, while base station 1132 is waiting for multiplexed aperiodic CSI and HARQ feedback.

[0142] UE 1130 may then use the PUCCH resources indicated by the last PDCCH to send multiplexed aperiodic CSI and HARQ feedback 1120. For example, UE 1130 may use the second PUCCH resources 1118 indicated by the HARQ PRI field 1152 of the second downlink grant 1112 to send multiplexed aperiodic CSI and HARQ feedback 1120.

[0143] Figure 12 An example communication flow 1200 between a base station 1202 and a UE 1204 as presented herein is illustrated. In the illustrated example, the communication flow 1200 facilitates improved scheduling of the UE 1204 for A-CSI reporting. Aspects of the base station 1202 may be implemented by Figure 1 Base station 102 / 180 and / or Figure 3 Various aspects of UE 1204 can be implemented by base station 310. Figure 1 UE 104 and / or Figure 3 UE 350 implementation. Figure 12 , but it will be appreciated that in additional or alternative examples, base station 1202 can communicate with one or more other base stations or UEs, and / or UE 1204 can communicate with one or more other base stations or UEs.

[0144] At 1210, base station 1202 may configure CSI multiplexing on UE 1204. In some examples, base station 1202 may configure UE 1204 to forgo performing CSI multiplexing. For example, base station 1202 may send an RRC configuration 1212 that does not include multiplexing parameters, which are received by UE 1204. The multiplexing parameters may indicate one or more PUCCH resources to be used by UE 1204 when sending an A-CSI report multiplexed with additional information (e.g., another A-CSI report, HARQ feedback, etc.). When UE 1204 does not configure the multiplexing parameters (e.g., via RRC configuration 1212), UE 1204 may determine to forgo performing CSI multiplexing.

[0145] like Figure 12 As shown, base station 1202 sends DCI 1220 that schedules multiple A-CSI reports received by UE 1204. Base station 1202 may also send DCI 1222 scheduling reports in the same time slot. Aspects of DCI 1220 and DCI 1222 may be determined by Figure 6A DCI 620, Figure 8B DCI 860, Figure 10 DCI 1050, and / or Figure 11 DCI 1150 implementation. Reference Figure 8A For example, the UE 800 may be configured to transmit two or more of the first PUCCH resource 804 , the second PUCCH resource 806 , the third PUCCH resource 808 , and the fourth PUCCH resource 810 during the time slot 802 .

[0146] When the base station 1202 does not provide the multiplexing parameters to the UE 1204, the base station 1202 may schedule multiple A-CSI reports such that the multiple A-CSI reports are less than a certain number (e.g., a maximum of two A-CSI reports), and the corresponding A-CSI reports are non-overlapping in the time domain within the time slot.

[0147] At 1230, UE 1204 generates an A-CSI report. UE 1204 may generate an A-CSI report based on the CSI-RS triggered by DCI 1220 and / or DCI 1222. For example, and with reference to Figure 6A and 6B In some examples, each downlink grant may trigger a corresponding CSI-RS. UE 1204 may use the corresponding CSI-RS to measure channel conditions and generate a corresponding A-CSI report. In some examples, UE 1204 may generate an A-CSI report based on a corresponding A-CSI request, such as in conjunction with Figure 7 The aperiodic CSI request 702 is described.

[0148] At 1234, UE 1204 may select PUCCH resources for sending multiple A-CSI reports. In some examples, UE 1204 may use PUCCH resources associated with each downlink grant. For example, each downlink grant may schedule UE 1204 to use corresponding PUCCH resources to send a corresponding A-CSI report. In such an example, UE 1204 may send multiple A-CSI reports 1240 that are received by base station 1202. UE 1204 may send multiple A-CSI reports 1240 using PUCCH resources associated with the corresponding multiple A-CSI reports. UE 1204 may send multiple A-CSI reports 1240 in respective PUCCHs in the same time slot while forgoing CSI multiplexing.

[0149] Reference again Figure 12 1210, in some examples, base station 1202 can configure UE 1204 to perform CSI multiplexing. For example, base station 1202 can send an RRC configuration 1214 including multiplexing parameters received by UE 1204. The multiplexing parameters can indicate one or more PUCCH resources to be used by UE 1204 when sending an A-CSI report multiplexed with additional information (e.g., another A-CSI report, HARQ feedback, etc.). For example, the multiplexing parameters can include Figure 8B The multiplexing parameter may be referred to as "multi-CSI-PUCCH-resourceList" or any other suitable name.

[0150] At 1230, UE 1204 may generate an A-CSI report after receiving DCI 1220 and / or DCI 1222. At 1232, UE 1204 may perform A-CSI report multiplexing and multiplex one or more A-CSI reports with additional information (e.g., another A-CSI report, HARQ feedback, etc.). Figure 8B For example, UE 1204 may multiplex the three PUCCH resources 852, 854, 856 scheduled for time slot 850 into a multiplexed PUCCH 858 ("MUX PUCCH").

[0151] At 1234, UE 1204 may select a PUCCH resource for transmission to base station 1202. In some examples, UE 1204 may select a PUCCH resource from one or more PUCCH resources indicated by a multiplexing parameter. In some examples, UE 1204 may select a PUCCH resource based on a last PRI value indicated by a corresponding downlink grant. For example, UE 1204 may select a PUCCH resource based on Figure 6A PRI field 628, Figure 7 Time slot offset and PUCCH resource information 706, Figure 10 PRI field 1053 and / or Figure 11 The PUCCH resource is selected based on the value indicated by the HARQ PRI field 1152.

[0152] The UE 1204 sends a multiplexed CSI report 1242, which is received by the base station 1202. The UE 1204 may send the multiplexed CSI report 1242 using the selected PUCCH resources.

[0153] In some examples, base station 1202 can schedule UE 1204 to send HARQ feedback. For example, base station 1202 can send DCI 1224 that is received by UE 1204. DCI 1224 can schedule multiplexing of CSI reports with HARQ feedback, such as in conjunction with Figure 4 、 9 , 10 and / or 11. For example, reference Figure 10 For example, the base station 1202 may send a first downlink grant 1002 and trigger the UE 1204 to send aperiodic CSI feedback 1006 using a first PUCCH resource 1008. The base station 1202 may also send a second downlink grant 1012 and trigger the UE 1204 to send HARQ feedback 1016 using a second PUCCH resource 1018. Figure 10 As shown, the first PUCCH resource 1008 and the second PUCCH resource 1018 at least partially overlap in time.

[0154] At 1232, UE 1204 may perform A-CSI report multiplexing and multiplex one or more A-CSI reports with HARQ feedback. Figure 10 For example, UE 1204 can generate multiplexed aperiodic CSI and HARQ feedback 1020 based on the multiplexing of aperiodic CSI feedback 1006 and HARQ feedback 1016.

[0155] At 1234, UE 1204 may select a PUCCH resource to send the multiplexed aperiodic CSI report and HARQ feedback to base station 1202. In some examples, UE 1204 may select a PUCCH resource from one or more PUCCH resources indicated by the multiplexing parameter. In some examples, UE 1204 may select a PUCCH resource based on the last PRI value indicated by the corresponding downlink grant. For example, UE 1204 may select a PUCCH resource based on the last PRI value indicated by the corresponding downlink grant. Figure 6A PRI field 628, Figure 7 Time slot offset and PUCCH resource information 706, Figure 10 PRI field 1053 and / or Figure 11 The HARQ PRI field 1152 indicates the value of the PUCCH resource. Figure 10 For example, the UE 1204 may select PUCCH resources using the value of the HARQ PRI field 1052 or the value of the CSI PRI field 1054. In some examples, the UE 1204 may select PUCCH resources using the later of the two PRI values.

[0156] The UE 1204 may then send a CSI report with the multiplexed HARQ feedback 1244, which is received by the base station 1202. The UE 1204 may use the resources selected at 1234 to send the CSI report with the multiplexed HARQ feedback 1244.

[0157] In some examples, base station 1202 may send an A-CSI request to UE 1204 at a first time and send a downlink grant that triggers HARQ feedback at a second time after the first time. For example, base station 1202 may send DCI 1220 and / or DCI 1222 that triggers aperiodic CSI feedback from UE 1204 at a first time, and may send DCI 1226 that schedules HARQ feedback at a second time that occurs after the first time in the time domain. In some such examples, DCI 1226 that schedules HARQ feedback may indicate when UE 1204 performs CSI multiplexing. For example, referring to Figure 11 For example, the DCI 1150 may include a multiplexing field 1154 to indicate to the UE 1204 whether to multiplex the HARQ feedback with the aperiodic CSI feedback. For example, when the UE 1204 does not multiplex the HARQ feedback with the aperiodic CSI feedback, the multiplexing field 1154 may include a first value (e.g., “0”), and when the UE 1204 multiplexes the HARQ feedback with the aperiodic CSI feedback, the multiplexing field 1154 may include a second value (e.g., “1”).

[0158] In some examples, the UE 1204 may use the value of the multiplexing field at 1232 to determine whether to perform A-CSI report multiplexing. Figure 11 For example, when the multiplexing field 1154 is set to a first value (e.g., “0”), the UE 1204 may forgo multiplexing of the A-CSI report with the HARQ feedback. Similarly, when the multiplexing field 1154 is set to a second value (e.g., “1”), the UE 1204 may perform multiplexing of the A-CSI report with the HARQ feedback.

[0159] At 1234, UE 1204 may select a PUCCH resource for transmission to base station 1202. In some examples, UE 1204 may select a PUCCH resource from one or more PUCCH resources indicated by a multiplexing parameter. In some examples, UE 1204 may select a PUCCH resource based on a last PRI value indicated by a corresponding downlink grant. For example, UE 1204 may select a PUCCH resource based on Figure 6A PRI field 628, Figure 7 Time slot offset and PUCCH resource information 706, Figure 10 PRI field 1053 and / or Figure 11 The HARQ PRI field 1152 indicates the value of the PUCCH resource. Figure 11 For example, UE 1204 may use the value of the HARQ PRI field 1152 to select PUCCH resources.

[0160] When DCI 1226 indicates that CSI multiplexing is performed, UE 1204 may then send a CSI report with multiplexed HARQ feedback 1244 that is received by base station 1202. UE 1204 may send the CSI report with multiplexed HARQ feedback 1244 using the resources selected at 1234.

[0161] Otherwise, the UE 1204 may send a CSI report without multiplexing the HARQ feedback. For example, the UE 1204 may use a first PUCCH resource (e.g., based on Figure 10 The CSI report may be sent using a second PUCCH resource (e.g., based on the value of the CSIPRI field 1054 of Figure 10 The HARQ feedback is sent based on the value of the HARQ PRI field 1052).

[0162] In some examples, the base station 1202 may configure the UE 1204 with the ability to perform CSI multiplexing while also indicating that the UE 1204 will forgo performing CSI multiplexing for the transmission. For example, the base station 1202 may send an RRC configuration 1214 including multiplexing parameters and provide one or more PUCCH resources to the UE 1204 for use when performing CSI multiplexing. The base station 1202 may also send DCI 1220 and DCI 1222 that schedule multiple A-CSI reports in the same time slot. However, in some examples, the base station 1202 may set the multiplexing field of the DCI 1220 and / or DCI 1222 to a first value (e.g., "0") to indicate that there is no multiplexing. In some examples, the base station 1202 may use the DAI field of the DCI to provide an indication of the multiplexing behavior. For example, the base station 1202 may set the total DAI field of the DCI 1220 and / or DCI 1222 to a value of "00" to indicate that there is no multiplexing. In such examples, UE 1204 may be configured to perform CSI multiplexing (eg, by receiving multiplexing parameters), but may not perform CSI multiplexing for a particular transmission.

[0163] Figure 13 1 is a flow chart of a wireless communication method. The method may be performed by a UE (e.g., UE 104, UE 350 and / or Figure 17 The method can improve the scheduling of UEs for A-CSI reporting.

[0164] At 1302, the UE receives a schedule to provide an A-CSI report while abandoning A-CSI multiplexing, scheduling a maximum of two A-CSI reports for the UE in the same time slot, and multiple A-CSI reports in the same time slot do not overlap in time, such as in conjunction with Figure 12 1220 and DCI 1222 of . In some examples, the UE may receive a schedule for no more than two A-CSI reports in the same time slot, where the multiple A-CSI reports do not overlap in time in the same time slot. For example, if a multiplexing CSI PUCCH resource list (e.g., "multi-CSI-PUCCH-resourceList") is not configured, the UE may determine to abandon performing CSI multiplexing. In such an example, the base station may schedule the UE to send up to two A-CSI reports on a PUCCH scheduled in the same time slot, and the two A-CSI reports do not overlap in time. Receiving the schedule at 1302 may be, for example, by Figure 17 The CSI scheduling component 1740 and / or the receiving component 1730 of the device 1702 are executed.

[0165] At 1304, the UE sends multiple A-CSI reports to the base station in corresponding PUCCHs in the same time slot and simultaneously abandons CSI multiplexing, such as in conjunction with Figure 12 For example, the UE may send up to two A-CSI reports at different times in a single time slot, for example, using resources scheduled by the base station for the UE. The UE may measure the CSI-RS to provide the A-CSI reports. Sending multiple A-CSI reports at 1304 may be performed by, for example, Figure 17 The reporting component 1742 and / or the transmission component 1734 of the device 1702 are executed.

[0166] Figure 14 1 is a flow chart of a wireless communication method. The method may be performed by a UE (e.g., UE 104, UE 350 and / or Figure 17 The method can improve the scheduling of UEs for A-CSI reporting.

[0167] At 1404, the UE receives a schedule to provide A-CSI reports while forgoing A-CSI multiplexing, the schedule being for a maximum of two A-CSI reports in the same time slot for the UE, and the multiple A-CSI reports not overlapping in time in the same time slot, as in conjunction with Figure 12 1220 and DCI 1222 of . In some examples, the UE may receive a schedule for no more than two A-CSI reports in the same time slot, where the multiple A-CSI reports do not overlap in time in the same time slot. For example, if a multiplexing CSI PUCCH resource list (e.g., "multi-CSI-PUCCH-resourceList") is not configured, the UE may determine to abandon performing CSI multiplexing. In such an example, the base station may schedule the UE to send up to two A-CSI reports on the PUCCH scheduled in the same time slot, and the two A-CSI reports do not overlap in time. Receiving the schedule at 1404 may be, for example, by Figure 17 The CSI scheduling component 1740 and / or the receiving component 1730 of the device 1702 are executed.

[0168] At 1406, the UE sends multiple A-CSI reports to the base station in each PUCCH in the same time slot and simultaneously abandons CSI multiplexing, such as in combination with Figure 12 For example, the UE may send up to two A-CSI reports at different times in a single time slot, for example, using resources scheduled by the base station for the UE. The UE may measure the CSI-RS to provide the A-CSI reports. Sending multiple A-CSI reports at 1406 may be performed by, for example, Figure 17The reporting component 1742 and / or the transmission component 1734 of the device 1702 are executed.

[0169] As shown in 1402, the UE may receive an RRC configuration from a base station that does not include parameters for enabling CSI multiplexing, such as in conjunction with Figure 12 For example, the UE may receive the RRC configuration without a multiplexed CSI PUCCH resource list (e.g., "multi-CSI-PUCCH-resourceList") configured for the UE. The RRC configuration received at 1402 may be configured by, for example, Figure 17 The configuration component 1744 of the device 1702 is executed.

[0170] Figure 15 1 is a flow chart of a wireless communication method. The method may be performed by a UE (e.g., UE 104, UE 350 and / or Figure 17 The method can improve the scheduling of UEs for A-CSI reporting.

[0171] At 1502, the UE receives a downlink grant that schedules the UE to provide an A-CSI report, such as in conjunction with Figure 6A DCI 620 and / or Figure 12 The downlink grant may include at least one of a counter DAI associated with the A-CSI report and a total DAI associated with the A-CSI report. The counter DAI may indicate an index of the A-CSI report in the A-CSI codebook for multiplexing multiple A-CSI reports. The total DAI may indicate the total number of A-CSI reports to be multiplexed in the PUCCH resource. Receiving the downlink grant at 1502 may be performed, for example, by Figure 17 The CSI scheduling component 1740 and / or the receiving component 1730 of the device 1702 are executed.

[0172] In some examples, a total number of DAI code points (e.g., "00") may indicate that CSI multiplexing is being scheduled for the UE, where CSI multiplexing includes multiplexing an A-CSI report with a second A-CSI report, such as in conjunction with Figure 8B The total number of DAI fields 864 are described. In some examples, the total number of DAI code points (e.g., "00") can indicate a specific number of CSI reports to be multiplexed in the same PUCCH.

[0173] In some examples, the combination of the total number of DAI code points and the counter DAI may indicate that CSI multiplexing is being scheduled for the UE, such as in conjunction with Figure 8B The counter DAI field 862 and the total DAI field 864 are described.

[0174] In some examples, the combination of the total number of DAI code points and the counter DAI may indicate the amount of CSI reports to be multiplexed in the same PUCCH transmission, such as in conjunction with Figure 8B The counter DAI field 862 and the total DAI field 864 are described. For example, the UE may compare the value of the counter DAI field 862 with the value of the total DAI field 864 to determine whether the UE is to perform CSI multiplexing or to determine the number of A-CSI reports to be multiplexed in the same PUCCH transmission.

[0175] For example, when the total number DAI field 864 is set to "00" and the counter DAI field 862 is set to "01", the UE may determine that the "00" value of the total number DAI field 864 corresponds to no multiplexing. Otherwise, if the total number DAI field 864 is set to "00" and the counter DAI field 862 is set to a value other than "01", the UE may determine that the "00" value of the total number DAI field 864 corresponds to a non-periodic CSI report that multiplexes 4, 8, etc.

[0176] In some examples, the downlink grant may include at least one bit indicating that CSI multiplexing is being scheduled for the UE, the CSI multiplexing including multiplexing the A-CSI report with a second A-CSI report, such as in conjunction with Figure 8B The multiplexing field 866 is described. For example, the multiplexing field 866 can be set to a first value (e.g., "0") to indicate no multiplexing, and can be set to a second value (e.g., "1") to indicate multiplexing.

[0177] Thus, the UE may use one or more bits of the downlink grant to determine when to multiplex CSI reports and / or to determine how many CSI reports to multiplex in a single PUCCH transmission.

[0178] At 1504, the UE sends a CSI report to the base station in the PUCCH based on the downlink grant, as shown in conjunction with Figure 12 In some examples, the UE may measure the CSI-RS to provide a CSI report. For example, Figure 17 The reporting component 1742 of the apparatus 1702 performs sending the CSI report at 1504 .

[0179] Figure 16 1 is a flow chart of a wireless communication method. The method may be performed by a UE (e.g., UE 104, UE 350 and / or Figure 17 The method can improve the scheduling of UEs for A-CSI reporting.

[0180] At 1604, the UE receives a downlink grant that schedules the UE to provide an A-CSI report, such as in conjunction with Figure 6A DCI 620 and / or Figure 12 The downlink grant may include at least one of a counter DAI associated with the A-CSI report and a total DAI associated with the A-CSI report. The counter DAI may indicate the index of the A-CSI report in the A-CSI codebook used to multiplex multiple A-CSI reports. The total DAI may indicate the total number of A-CSI reports to be multiplexed in the PUCCH resource. Receiving the downlink grant at 1604 may be performed by, for example, Figure 17 The CSI scheduling component 1740 and / or the receiving component 1730 of the device 1702 are executed.

[0181] In some examples, a total number of DAI code points (e.g., "00") may indicate that CSI multiplexing is being scheduled for the UE, where CSI multiplexing includes multiplexing an A-CSI report with a second A-CSI report, such as in conjunction with Figure 8B The total number of DAI fields 864 may be used to describe the total number of CSI reports. In some examples, the total number of DAI code points (e.g., "00") may indicate a specific number of CSI reports to be multiplexed in the same PUCCH.

[0182] In some examples, the combination of the total number of DAI code points and the counter DAI may indicate that CSI multiplexing is being scheduled for the UE, such as in conjunction with Figure 8B The counter DAI field 862 and the total DAI field 864 are described.

[0183] In some examples, the combination of the total number of DAI code points and the counter DAI may indicate the amount of CSI reports to be multiplexed in the same PUCCH transmission, such as in conjunction with Figure 8B The counter DAI field 862 and the total DAI field 864 are described. For example, the UE may compare the value of the counter DAI field 862 with the value of the total DAI field 864 to determine whether the UE is to perform CSI multiplexing or to determine the number of A-CSI reports to be multiplexed in the same PUCCH transmission.

[0184] For example, when the total number DAI field 864 is set to "00" and the counter DAI field 862 is set to "01", the UE may determine that the "00" value of the total number DAI field 864 corresponds to no multiplexing. Otherwise, if the total number DAI field 864 is set to "00" and the counter DAI field 862 is set to a value other than "01", the UE may determine that the "00" value of the total number DAI field 864 corresponds to a non-periodic CSI report that multiplexes 4, 8, etc.

[0185] In some examples, the downlink grant may include at least one bit indicating that CSI multiplexing is being scheduled for the UE, the CSI multiplexing including multiplexing the A-CSI report with a second A-CSI report, such as in conjunction with Figure 8B The multiplexing field 866 is described by the multiplexing field 866. For example, the multiplexing field 866 can be set to a first value (e.g., "0") to indicate no multiplexing, and the multiplexing field 866 can be set to a second value (e.g., "1") to indicate multiplexing.

[0186] Thus, the UE may use one or more bits of the downlink grant to determine when to multiplex CSI reports and / or to determine how many CSI reports to multiplex in a single PUCCH transmission.

[0187] At 1610, the UE sends a CSI report to the base station in the PUCCH based on the downlink grant, as shown in conjunction with Figure 12 In some examples, the UE may measure the CSI-RS to provide a CSI report. For example, Figure 17 The reporting component 1742 of the apparatus 1702 performs the sending of the CSI report at 1610 .

[0188] In some examples, the UE may be configured to perform CSI multiplexing. For example, at 1602, the UE receives an RRC configuration including parameters for enabling CSI multiplexing, such as in conjunction with Figure 8B Multiplexing CSIPUCCH resource list 870 and / or Figure 12 As described in the RRC configuration 1214 of the UE. For example, the RRC configuration may include a multiplexed CSIPUCCH resource list (e.g., "multi-CSI-PUCCH-resourceList") configured for the UE. In some examples, the multiplexed CSIPUCCH resource list may indicate one or more PUCCH resources for sending multiplexed A-CSI reports. In some examples, the PUCCH resources used to send the CSI report (e.g., at 1610) may be included in the one or more PUCCH resources. In such an example, the UE may select a PUCCH resource based on the payload size of the multiplexed A-CSI report. That is, one or more PUCCH resources included in the one or more PUCCH resources may be configured to accommodate different payload sizes. For example, Figure 17 The configuration component 1744 of the apparatus 1702 performs the received RRC configuration at 1602 .

[0189] In some examples, the UE may be configured to multiplex CSI reports with HARQ feedback. For example, at 1606, the UE may receive a schedule to multiplex A-CSI reports with one or more HARQ-ACK feedbacks, such as in conjunction with Figure 10 DCI 1050 and / or Figure 12 The receiving schedule at 1606 to multiplex the A-CSI report with one or more HARQ-ACK feedbacks may be, for example, Figure 17 The CSI scheduling component 1740 of the device 1702 is executed.

[0190] In some examples, the PRI in the last downlink grant may indicate a second PUCCH resource for the UE to use for A-CSI reporting multiplexed with one or more HARQ-ACK feedbacks, such as in conjunction with Figure 10 The second downlink grant 1012 is described.

[0191] In some examples, the UE may receive (e.g., at 1604) multiple PRI values in each downlink grant, such as in conjunction with Figure 10 PRI field 1052 and CSIPRI field 1054 of the HARQ PRI field 1052. For example, the UE may receive a first PRI value associated with one or more HARQ-ACK feedbacks and a second PRI value associated with an A-CSI report. In such an example, the UE may send an A-CSI report multiplexed with one or more HARQ-ACK feedbacks based on the last indicated PRI value of the first PRI value and the second PRI value at 1612, as described in conjunction with Figure 10 Aperiodic CSI and HARQ feedback 1020 and / or Figure 12 The CSI report multiplexed with the HARQ feedback 1244 is described. For example, it can be Figure 17 The reporting component 1742 of the apparatus 1702 performs sending an A-CSI report multiplexed with one or more HARQ-ACK feedback at 1612 .

[0192] In some examples, the transmission of A-CSI reports and HARQ-ACK feedback can be based on DAI, such as in conjunction with Figure 10 The HARQ DAI field 1057 and the CSI DAI field 1061 are described. For example, the UE may receive a first counter DAI associated with the A-CSI report, a first total DAI associated with the A-CSI report, a second counter DAI associated with one or more HARQ-ACK feedbacks, and a second total DAI associated with one or more HARQ-ACK feedbacks.

[0193] In some examples, the CSI report may include a concatenation of one or more HARQ-ACK feedbacks based on the first codebook and an A-CSI report based on the second codebook, such as in combination with Figure 10 As described in the HARQ-ACK codebook 1021 and the aperiodic CSI codebook 1022. For example, the UE may determine the HARQ-ACK codebook and the A-CSI report codebook separately, and may concatenate the HARQ-ACK and A-CSI reports together after applying their respective codebooks.

[0194] As shown at 1608, the UE may receive a downlink control channel scheduling a first HARQ-ACK feedback, such as in conjunction with Figure 11 DCI 1150 and / or Figure 12 The UE may receive a downlink control channel (e.g., at 1604) after receiving a downlink grant that schedules the UE to provide an A-CSI report. The downlink control channel that schedules the first HARQ-ACK feedback at 1608 may be received by Figure 17 The HARQ-ACK component 1746 and / or the receiving component 1730 of the device 1702 are executed.

[0195] In some examples, the downlink control channel scheduling the first HARQ-ACK feedback may include an indication to multiplex one or more HARQ-ACK feedbacks with the A-CSI report, such as in combination with Figure 11 as described by the multiplexing field 1154 .

[0196] In some examples, the third PUCCH resource associated with the first HARQ-ACK feedback may be indicated by the HARQ-ACK PRI in the last PDCCH that schedules the first HARQ-ACK feedback, as in conjunction with Figure 11 The HARQ PRI field 1152 is described.

[0197] Figure 1717 is a diagram illustrating an example of a hardware implementation of apparatus 1702. Apparatus 1702 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, apparatus 1702 may include a cellular baseband processor 1704 (also referred to as a modem) coupled to a cellular RF transceiver 1722. In some aspects, apparatus 1702 may also include one or more subscriber identity module (SIM) cards 1720, an application processor 1706 coupled to a secure digital (SD) card 1708 and a screen 1710, a Bluetooth module 1712, a wireless local area network (WLAN) module 1714, a global positioning system (GPS) module 1716, or a power supply 1718. Cellular baseband processor 1704 communicates with UE 104 and / or base station 102 / 180 via cellular RF transceiver 1722. Cellular baseband processor 1704 may include computer-readable media / memory. The computer-readable media / memory may be non-transitory. Cellular baseband processor 1704 is responsible for general processing, including executing software stored on the computer-readable media / memory. The software, when executed by the cellular baseband processor 1704, causes the cellular baseband processor 1704 to perform the various functions described above. The computer-readable medium / memory may also be used to store data that is manipulated by the cellular baseband processor 1704 when executing the software. The cellular baseband processor 1704 also includes a receive component 1730, a communication manager 1732, and a transmit component 1734. The communication manager 1732 includes one or more of the components shown. The components within the communication manager 1732 may be stored in the computer-readable medium / memory and / or configured as hardware within the cellular baseband processor 1704. The cellular baseband processor 1704 may be a component of the UE 350 and may include a memory 360 and / or at least one of a TX processor 368, an RX processor 356, and a controller / processor 359. In one configuration, the apparatus 1702 may be a modem chip and include only the cellular baseband processor 1704, and in another configuration, the apparatus 1702 may be the entire UE (e.g., see Figure 3 UE 350) and includes additional modules of device 1702.

[0198] The communication manager 1732 includes a CSI scheduling component 1740 that is configured to receive a schedule to provide multiple A-CSI reports while abandoning CSI multiplexing, for example, scheduling up to two A-CSI reports in the same time slot for a UE, such as in conjunction with Figure 13 1302 and / or Figure 14 The example CSI scheduling component 1740 may also be configured to receive a downlink grant that schedules the UE to provide an A-CSI report, the downlink grant including at least one of a counter DAI associated with the A-CSI report and a total number DAI associated with the A-CSI report, for example, as described in conjunction with Figure 15 1502 and / or Figure 16 The example CSI scheduling component 1740 may also be configured to receive a schedule to multiplex an A-CSI report with one or more HARQ-ACK feedbacks, for example, as described in conjunction with Figure 16 Described in 1606.

[0199] The communication manager 1732 also includes a reporting component 1742 configured to send multiple A-CSI reports in corresponding PUCCHs, for example, as combined with Figure 13 1304 and / or Figure 14 The example reporting component 1742 may also be configured to send a CSI report to the base station in the PUCCH based on the downlink grant, for example, as described in conjunction with Figure 15 1504 and / or Figure 16 The example reporting component 1742 may also be configured to send an A-CSI report multiplexed with one or more HARQ-ACK feedbacks, for example, as described in conjunction with Figure 16 Described in 1612.

[0200] The communications manager 1732 also includes a configuration component 1744 configured to receive an RRC configuration that does not include a parameter for enabling CSI multiplexing, e.g., as described in conjunction with Figure 14 The example configuration component 1744 may also be configured to receive an RRC configuration having parameters for enabling CSI multiplexing, for example, as described in conjunction with Figure 16 Described in 1602.

[0201] The communications manager 1732 also includes a HARQ-ACK component 1746 configured to receive a downlink control channel scheduling a first HARQ-ACK feedback, e.g., as described in conjunction with Figure 16 Described in 1608.

[0202] The device may include additional components that perform Figure 13 、 14 , 15 and / or 16. Thus, Figure 13 、 14 Each block in the flowcharts of 15 and / or 16 may be performed by a component, and the apparatus may include one or more of those components. These components may be one or more hardware components specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored on a computer-readable medium for processor implementation, or some combination thereof.

[0203] As shown, the apparatus 1702 may include various components configured for various functions. In one configuration, the apparatus 1702, and in particular the cellular baseband processor 1704, includes means for receiving a schedule to provide multiple A-CSI reports while forgoing A-CSI multiplexing, wherein at most two A-CSI reports are scheduled for a UE in the same time slot, and the multiple A-CSI reports do not overlap in time in the same time slot. The example apparatus 1702 also includes means for transmitting the multiple A-CSI reports to a base station in respective PUCCHs in the same time slot while forgoing CSI multiplexing.

[0204] In another configuration, the example apparatus 1702 further includes means for receiving, from a base station, an RRC configuration that does not include parameters for enabling CSI multiplexing.

[0205] In another configuration, the apparatus 1702, and in particular the cellular baseband processor 1704, includes means for receiving a downlink grant for scheduling a UE to provide an A-CSI report, the downlink grant including at least one of a counter DAI associated with the A-CSI report and a total number DAI associated with the A-CSI report, the counter DAI indicating an index of the A-CSI report in an A-CSI codebook used to multiplex multiple A-CSI reports, and the total number DAI indicating the total number of A-CSI reports multiplexed in a PUCCH resource. The example apparatus 1702 also includes means for transmitting the CSI report to a base station in a PUCCH based on the downlink grant.

[0206] In another configuration, the example apparatus 1702 further includes means for receiving a radio resource control configuration including a parameter for enabling CSI multiplexing, the parameter for enabling CSI multiplexing indicating one or more PUCCH resources associated with the UE for transmitting the multiplexed CSI report. The example apparatus 1702 further includes means for selecting the PUCCH resource based on a payload size of the multiplexed CSI report.

[0207] In another configuration, the example apparatus 1702 further includes means for receiving a schedule to multiplex the A-CSI report with one or more HARQ-ACK feedbacks.

[0208] In another configuration, the example apparatus 1702 further includes means for receiving, in each downlink grant, a plurality of PRI values, a first PRI value associated with one or more HARQ-ACK feedbacks, and a second PRI value associated with an A-CSI report. The example apparatus 1702 further includes means for transmitting an A-CSI report multiplexed with the one or more HARQ-ACK feedbacks based on a last indicated PRI value of the first PRI value and the second PRI value.

[0209] In another configuration, the example apparatus 1702 further includes means for receiving, in each downlink grant, a first counter DAI associated with the A-CSI report, a first total DAI associated with the A-CSI report, a second counter DAI associated with one or more HARQ-ACK feedback, and a second total DAI associated with the one or more HARQ-ACK feedback, and wherein the CSI report includes a concatenation of the one or more HARQ-ACK feedback based on the first codebook and the A-CSI report based on the second codebook.

[0210] In another configuration, the example apparatus 1702 further includes a unit for receiving a downlink control channel for scheduling a first HARQ-ACK feedback after receiving a downlink grant for scheduling the UE to provide an A-CSI report, wherein the downlink control channel for scheduling the first HARQ-ACK feedback includes an indication to multiplex one or more HARQ-ACK feedbacks with the A-CSI report.

[0211] A means may be one or more components of the apparatus 1702 configured to perform the functions recited by that means. As described above, the apparatus 1702 may include the TX processor 368, the RX processor 356, and the controller / processor 359. Thus, in one configuration, that means may be the TX processor 368, the RX processor 356, and the controller / processor 359 configured to perform the functions recited by that means.

[0212] Figure 18 is a flow chart of a wireless communication method. The method may be performed by a base station (eg, base station 102 / 180, base station 310 and / or Figure 22 The method can improve the scheduling of UEs for A-CSI reporting.

[0213] At 1802, the base station schedules the UE to provide multiple A-CSI reports while abandoning A-CSI multiplexing, such as in combination with Figure 12 The scheduling of multiple A-CSI reports at 1802 while dropping A-CSI multiplexing may be performed by Figure 22 The scheduling component 2242 of the device 2202 is executed.

[0214] At 1804, the base station schedules at most two A-CSI reports for the UE in the same time slot, and the multiple A-CSI reports in the same time slot do not overlap in time, such as in combination with Figure 12For example, if the multiplexing CSI PUCCH resource list (e.g., "multi-CSI-PUCCH-resourceList") is not configured, the UE is not configured to perform A-CSI multiplexing. In such an example, the base station may schedule at most two A-CSI reports on PUCCH resources scheduled in the same time slot, and the two A-CSI reports do not overlap in time. The scheduling of at most two A-CSI reports in the same time slot at 1804 may be performed by Figure 22 The scheduling component 2242 of the device 2202 is executed.

[0215] At 1806, the base station receives multiple A-CSI reports from the UE in the corresponding PUCCH, as combined with Figure 12 For example, the base station may receive up to two A-CSI reports at different times in a single time slot, for example, using resources scheduled by the base station. The receiving of multiple A-CSI reports at 1806 may be performed by Figure 22 The reporting component 2244 of the apparatus 2202 is executed. In some examples, multiple A-CSI reports can be based on the CSI-RS sent to the UE.

[0216] Figure 19 is a flow chart of a wireless communication method. The method may be performed by a base station (eg, base station 102 / 180, base station 310 and / or Figure 22 The method can improve the scheduling of UEs for A-CSI reporting.

[0217] As shown at 1902, the base station may send an RRC configuration to the UE that does not include parameters for enabling CSI multiplexing, such as in conjunction with Figure 12 For example, the base station may send the RRC configuration without a multiplexing CSI PUCCH resource list (e.g., "multi-CSI-PUCCH-resourceList") configured for the UE. The sending of the RRC configuration at 1902 may be performed by Figure 22 The configuration component 2240 of the device 2202 is executed.

[0218] At 1904, the base station schedules the UE to provide multiple A-CSI reports while abandoning A-CSI multiplexing, such as in conjunction with Figure 12 The scheduling of multiple A-CSI reports at 1904 while abandoning A-CSI multiplexing can be done by Figure 22 The scheduling component 2242 of the device 2202 is executed.

[0219] At 1906, the base station schedules at most two A-CSI reports for the UE in the same time slot, and the multiple A-CSI reports in the same time slot do not overlap in time, such as in combination with Figure 12 For example, if the multiplexing CSI PUCCH resource list (e.g., "multi-CSI-PUCCH-resourceList") is not configured, the UE is not configured to perform A-CSI multiplexing. In such an example, the base station may schedule at most two A-CSI reports on PUCCH resources scheduled in the same time slot, and the two A-CSI reports do not overlap in time. Scheduling at most two A-CSI reports in the same time slot at 1906 may be performed by Figure 22 The scheduling component 2242 of the device 2202 is executed.

[0220] At 1908, the base station receives multiple A-CSI reports from the UE in the corresponding PUCCH, as combined with Figure 12 For example, the base station may receive up to two A-CSI reports at different times in a single time slot (e.g., using resources scheduled by the base station). The receiving of multiple A-CSI reports at 1908 may be performed by Figure 22 The reporting component 2244 of the apparatus 2202 is executed. In some examples, multiple A-CSI reports can be based on the CSI-RS sent to the UE.

[0221] Figure 20 is a flow chart of a wireless communication method. The method may be performed by a base station (eg, base station 102 / 180, base station 310 and / or Figure 22 The method can improve the scheduling of UEs for A-CSI reporting.

[0222] At 2002, the base station sends a downlink grant for scheduling the UE to provide an A-CSI report, the downlink grant including at least one of a counter DAI associated with the A-CSI report and a total DAI associated with the A-CSI report, as described in conjunction with Figure 6A DCI 620 and / or Figure 12 The counter DAI may indicate the index of the A-CSI report in the A-CSI codebook used to multiplex multiple A-CSI reports and the total number DAI may indicate the total number of A-CSI reports to be multiplexed in the PUCCH resource. The downlink grant at 2002 that schedules the UE to provide an A-CSI report may be sent by, for example Figure 22 The scheduling component 2242 and / or the transmission component 2234 of the device 2202 are executed.

[0223] In some examples, a total number of DAI code points (e.g., "00") may indicate that CSI multiplexing is being scheduled for the UE, where CSI multiplexing includes multiplexing an A-CSI report with a second A-CSI report, such as in conjunction with Figure 8B The total number of DAI fields 864 are described. In some examples, the total number of DAI code points (e.g., "00") can indicate a specific number of CSI reports to be multiplexed in the same PUCCH.

[0224] In some examples, the combination of the total number of DAI code points and the counter DAI may indicate that CSI multiplexing is being scheduled for the UE and / or the amount of CSI reports to be multiplexed in the same PUCCH transmission, such as in conjunction with Figure 8B The counter DAI field 862 and the total DAI field 864 are described. For example, the base station can use the comparison between the counter DAI and the total DAI to indicate whether the UE is to perform CSI multiplexing or to indicate the number of A-CSI reports to be multiplexed in the same PUCCH transmission. For example, when the total DAI field 864 is set to "00" and the counter DAI field 862 is set to "01", the base station can indicate that the "00" value of the total DAI field 864 corresponds to no multiplexing. Otherwise, if the total DAI field 864 is set to "00" and the counter DAI field 862 is set to a value different from "01", the base station can indicate that the "00" value of the total DAI field 864 corresponds to multiplexing of 4, 8, etc. non-periodic CSI reports.

[0225] In some examples, the downlink grant may include at least one bit indicating that CSI multiplexing is being scheduled for the UE, the CSI multiplexing including multiplexing the A-CSI report with a second A-CSI report, such as in conjunction with Figure 8B The multiplexing field 866 is described. For example, the multiplexing field 866 can be set to a first value (e.g., "0") to indicate no multiplexing, and can be set to a second value (e.g., "1") to indicate multiplexing.

[0226] Therefore, the base station may use one or more bits of the downlink grant to indicate when to multiplex CSI reports and / or to indicate how many CSI reports to multiplex in a single PUCCH transmission.

[0227] At 2004, the base station receives a CSI report from the UE in the PUCCH based on the downlink grant, as shown in conjunction with Figure 12 The receiving of the CSI report from the UE in the PUCCH at 2004 may be performed by, for example, Figure 22The reporting component 2244 of the apparatus 2202 is executed. In some examples, the A-CSI report and the CSI report can be based on the CSI-RS sent by the base station.

[0228] Figure 21 is a flow chart of a wireless communication method. The method may be performed by a base station (eg, base station 102 / 180, base station 310 and / or Figure 22 The method can improve the scheduling of UEs for A-CSI reporting.

[0229] At 2104, the base station sends a downlink grant for scheduling the UE to provide an A-CSI report, the downlink grant including at least one of a counter DAI associated with the A-CSI report and a total DAI associated with the A-CSI report, as described in conjunction with Figure 6A DCI 620 and / or Figure 12 The counter DAI may indicate the index of the A-CSI report in the A-CSI codebook used to multiplex multiple A-CSI reports and the total number DAI may indicate the total number of A-CSI reports to be multiplexed in the PUCCH resource. The downlink grant at 2104 that schedules the UE to provide an A-CSI report may be sent by, for example Figure 22 The scheduling component 2242 and / or the transmission component 2234 of the device 2202 are executed.

[0230] In some examples, a total number of DAI code points (e.g., "00") may indicate that CSI multiplexing is being scheduled for the UE, where CSI multiplexing includes multiplexing an A-CSI report with a second A-CSI report, such as in conjunction with Figure 8B The total number of DAI fields 864 may be used to describe the total number of CSI reports. In some examples, the total number of DAI code points (e.g., "00") may indicate a specific number of CSI reports to be multiplexed in the same PUCCH.

[0231] In some examples, the combination of the total number of DAI code points and the counter DAI may indicate the amount of CSI reports being scheduled for CSI multiplexing for the UE and / or to be multiplexed in the same PUCCH transmission, as in conjunction with Figure 8BThe counter DAI field 862 and the total DAI field 864 are described. For example, the base station can use the comparison between the counter DAI and the total DAI to indicate whether the UE is to perform CSI multiplexing or to indicate the number of A-CSI reports to be multiplexed in the same PUCCH transmission. For example, when the total DAI field 864 is set to "00" and the counter DAI field 862 is set to "01", the base station can indicate that the "00" value of the total DAI field 864 corresponds to no multiplexing. Otherwise, if the total DAI field 864 is set to "00" and the counter DAI field 862 is set to a value different from "01", the base station can indicate that the "00" value of the total DAI field 864 corresponds to multiplexing of 4, 8, etc. non-periodic CSI reports.

[0232] In some examples, the downlink grant may include at least one bit indicating that CSI multiplexing is being scheduled for the UE, the CSI multiplexing including multiplexing the A-CSI report with a second A-CSI report, such as in conjunction with Figure 8B The multiplexing field 866 is described. For example, the multiplexing field 866 can be set to a first value (e.g., "0") to indicate no multiplexing, and can be set to a second value (e.g., "1") to indicate multiplexing.

[0233] Therefore, the base station may use one or more bits of the downlink grant to indicate when to multiplex CSI reports and / or to indicate how many CSI reports to multiplex in a single PUCCH transmission.

[0234] At 2110, the base station receives a CSI report from the UE in the PUCCH based on the downlink grant, as combined with Figure 12 The receiving of the CSI report from the UE in the PUCCH at 2110 may be performed by, for example, Figure 22 The reporting component 2244 of the apparatus 2202 is executed. In some examples, the A-CSI report and the CSI report can be based on the CSI-RS sent by the base station.

[0235] In some examples, the base station may configure the UE to perform CSI multiplexing. For example, at 2102, the base station may send an RRC configuration with parameters to enable CSI multiplexing to the UE, such as in conjunction with Figure 8B Multiplexing CSIPUCCH resource list 870 and / or Figure 12The RRC configuration 1214 is described. For example, the RRC configuration may include a multiplexing CSI PUCCH resource list configured for the UE (e.g., "multi-CSI-PUCCH-resourceList"). In some examples, the multiplexing CSI PUCCH resource list may indicate one or more PUCCH resources for transmitting the multiplexed A-CSI report. In some examples, the PUCCH resource may be selected from the one or more PUCCH resources to accommodate the payload size of the multiplexed A-CSI report. The transmit RRC configuration at 2102 may be configured by, for example, Figure 22 The configuration component 2240 of the device 2202 is executed.

[0236] In some examples, the base station may configure the UE to multiplex the CSI report with the HARQ feedback. For example, at 2106, the base station may send a schedule to multiplex the A-CSI report with one or more HARQ-ACK feedbacks, such as in conjunction with Figure 10 DCI 1050 and / or Figure 12 The transmission schedule at 2106 to multiplex the A-CSI report with one or more HARQ-ACK feedbacks may be performed by, for example Figure 22 The scheduling component 2242 of the device 2202 is executed.

[0237] In some examples, the PRI in the last downlink grant may indicate a second PUCCH resource for the UE to use for A-CSI reporting multiplexed with one or more HARQ-ACK feedbacks, such as in conjunction with Figure 10 The second downlink grant 1012 is described.

[0238] In some examples, the base station may send (e.g., at 2104) multiple PRI values in each downlink grant, such as in combination with Figure 10 PRI field 1052 and CSIPRI field 1054 are described. For example, the base station may indicate a first PRI value associated with one or more HARQ-ACK feedbacks and a second PRI value associated with the A-CSI report. In such an example, the base station may receive an A-CSI report multiplexed with one or more HARQ-ACK feedbacks based on the last indicated PRI value of the first PRI value and the second PRI value at 2112, as described in Figure 10 Multiplexed aperiodic CSI and HARQ feedback 1020 and / or Figure 12 The reception of the A-CSI report multiplexed with one or more HARQ-ACK feedback at 2112 may be performed, for example, by Figure 22 The reporting component 2244 of the device 2202 is executed.

[0239] In some examples, the reception of A-CSI reports and HARQ-ACK feedback can be based on DAI, such as in conjunction with Figure 10 As described in the HARQ DAI field 1057 and the CSIDAI field 1061 of the A-CSI report. For example, the base station may send a first counter DAI associated with the A-CSI report, a first total DAI associated with the A-CSI report, a second counter DAI associated with one or more HARQ-ACK feedbacks, and a second total DAI associated with the one or more HARQ-ACK feedbacks.

[0240] In some examples, the CSI report may include a concatenation of one or more HARQ-ACK feedbacks based on the first codebook and an A-CSI report based on the second codebook, such as in combination with Figure 10 The HARQ-ACK codebook 1021 and the aperiodic CSI codebook 1022 are described.

[0241] As shown in 2108, the base station may send a downlink control channel for scheduling the first HARQ-ACK feedback, such as in combination with Figure 11 DCI 1150 and / or Figure 12 The base station may send a downlink control channel scheduling the first HARQ-ACK feedback after sending a downlink grant scheduling the UE to provide an A-CSI report (e.g., at 2104). The downlink control channel sending the first HARQ-ACK feedback at 2108 may be composed of Figure 22 The HARQ-ACK component 2246 and / or the transmission component 2234 of the device 2202 are executed.

[0242] In some examples, the downlink control channel scheduling the first HARQ-ACK feedback may include an indication to multiplex one or more HARQ-ACK feedbacks with the A-CSI report, such as in combination with Figure 11 as described by the multiplexing field 1154 .

[0243] In some examples, the third PUCCH resource associated with the first HARQ-ACK feedback may be indicated by the HARQ-ACK PRI in the last PDCCH that schedules the first HARQ-ACK feedback, as in conjunction with Figure 11 The HARQ PRI field 1152 is described.

[0244] Figure 222 is a diagram illustrating an example hardware implementation of apparatus 2202. Apparatus 2202 may be a base station, a component of a base station, or may implement base station functionality. In some aspects, apparatus 2202 may include a baseband unit 2204. Baseband unit 2204 may communicate with UE 104 via a cellular RF transceiver 2222. Baseband unit 2204 may include computer-readable media / memory. Baseband unit 2204 is responsible for general processing, including executing software stored on computer-readable media / memory. This software, when executed by baseband unit 2204, enables baseband unit 2204 to perform the various functions described above. The computer-readable media / memory may also be used to store data manipulated by baseband unit 2204 when executing the software. Baseband unit 2204 also includes a receiving component 2230, a communication manager 2232, and a transmitting component 2234. Communication manager 2232 includes one or more of the components shown. Components within communication manager 2232 may be stored in computer-readable media / memory and / or configured as hardware within baseband unit 2204. The baseband unit 2204 may be a component of the base station 310 and may include a memory 376 and / or at least one of the TX processor 316 , the RX processor 370 , and the controller / processor 375 .

[0245] The communication manager 2232 includes a configuration component 2240 configured to send an RRC configuration to the UE that does not include parameters for enabling CSI multiplexing, e.g., as described in conjunction with Figure 19 The example configuration component 2240 may also be configured to send an RRC configuration with parameters enabling CSI multiplexing, for example, as described in conjunction with Figure 21 As described in 2102.

[0246] The communication manager 2232 also includes a scheduling component 2242 that is configured to schedule the UE to provide multiple A-CSI reports while abandoning A-CSI multiplexing, e.g., as in conjunction with Figure 18 1802 and / or Figure 19 The example scheduling component 2242 may also be configured to schedule at most two A-CSI reports for the UE in the same time slot, wherein the multiple A-CSI reports do not overlap in time in the same time slot, for example, as described in conjunction with Figure 18 1804 and / or Figure 19 The example scheduling component 2242 may also be configured to send a downlink grant that schedules the UE to provide an A-CSI report, the downlink grant including at least one of a counter DAI associated with the A-CSI report and a total number DAI associated with the A-CSI report, for example, as described in conjunction with Figure 20 2002 and / or Figure 21The example scheduling component 2242 may also be configured to send a schedule to multiplex the A-CSI report with one or more HARQ-ACK feedbacks, for example, as described in conjunction with Figure 21 As described in 2106.

[0247] The communication manager 2232 also includes a reporting component 2244 configured to receive a plurality of A-CSI reports from the UE in a corresponding PUCCH, e.g., as combined with Figure 18 1806 and / or Figure 19 The example reporting component 2244 may also be configured to receive a CSI report from the UE in the PUCCH based on a downlink grant, for example, as described in conjunction with Figure 20 2004 and / or Figure 21 The example reporting component 2244 may also be configured to receive an A-CSI report multiplexed with one or more HARQ-ACK feedbacks, e.g., as described in conjunction with Figure 21 described.

[0248] The communications manager 2232 also includes a HARQ-ACK component 2246 configured to send a downlink control channel scheduling a first HARQ-ACK feedback, e.g., as described in conjunction with Figure 21 As described in 2108.

[0249] The device may include additional components that perform Figure 18 、 19 , 20 and / or 21. Thus, Figure 18 、 19 Each block in the flowcharts of 20 and / or 21 can be performed by a component, and the apparatus may include one or more of those components. These components may be one or more hardware components specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for processor implementation, or some combination thereof.

[0250] As shown, apparatus 2202 may include various components configured for various functions. In one configuration, apparatus 2202, and in particular baseband unit 2204, includes means for scheduling a UE to provide multiple A-CSI reports while forgoing A-CSI multiplexing. Example apparatus 2202 also includes means for scheduling up to two A-CSI reports for a UE in the same time slot, where the multiple A-CSI reports do not overlap in time in the same time slot. Example apparatus 2202 also includes means for receiving the multiple A-CSI reports in corresponding PUCCHs from the UE.

[0251] In another configuration, the example apparatus 2202 further includes means for sending an RRC configuration to the UE that does not include parameters for enabling CSI multiplexing.

[0252] In another configuration, the apparatus 2202, and in particular the baseband unit 2204, includes means for sending a downlink grant for scheduling a UE to provide an A-CSI report, the downlink grant including at least one of a counter DAI associated with the A-CSI report and a total number DAI associated with the A-CSI report, the counter DAI indicating an index of the A-CSI report in an A-CSI codebook for multiplexing multiple A-CSI reports, and the total number DAI indicating the total number of A-CSI reports multiplexed in a PUCCH resource. The example apparatus 2202 also includes means for receiving a CSI report from the UE in a PUCCH based on the downlink grant.

[0253] In another configuration, the example apparatus 2202 further includes means for sending a radio resource control configuration to the UE with a parameter for enabling CSI multiplexing, the parameter indicating one or more PUCCH resources for sending the multiplexed A-CSI report.

[0254] In another configuration, the example apparatus 2202 further includes means for sending a schedule to multiplex the A-CSI report with one or more HARQ-ACK feedbacks.

[0255] In another configuration, the example apparatus 2202 further includes means for indicating a plurality of PRI values in each downlink grant, a first PRI value associated with one or more HARQ-ACK feedbacks and a second PRI value associated with an A-CSI report, and

[0256] A unit of an A-CSI report multiplexed with one or more HARQ-ACK feedback is received from the UE based on a last indicated PRI value of the first PRI value and the second PRI value.

[0257] In another configuration, the example apparatus 2202 further includes means for indicating, in each downlink grant, a first counter DAI associated with the A-CSI report, a first total DAI associated with the A-CSI report, a second counter DAI associated with one or more HARQ-ACK feedback, and a second total DAI associated with the one or more HARQ-ACK feedback, and wherein the CSI report includes a concatenation of the one or more HARQ-ACK feedback based on the first codebook and the A-CSI report based on the second codebook.

[0258] In another configuration, the example apparatus 2202 further includes a unit for sending a downlink control channel for scheduling a first HARQ-ACK feedback after sending a downlink grant for scheduling the UE to provide an A-CSI report, wherein the downlink control channel for scheduling the first HARQ-ACK feedback includes an indication to multiplex one or more HARQ-ACK feedback with the A-CSI report.

[0259] This means may be one or more components of the apparatus 2202 configured to perform the functions recited by this means. As described above, the apparatus 2202 may include the TX processor 316, the RX processor 370, and the controller / processor 375. Thus, in one configuration, this means may be the TX processor 316, the RX processor 370, and the controller / processor 375 configured to perform the functions recited by this means.

[0260] The example techniques disclosed herein enable a UE to provide downlink grant-triggered A-CSI feedback on an uplink control channel (e.g., PUCCH). Providing A-CSI feedback using PUCCH can be faster than A-CSI reporting on PUSCH and can provide more up-to-date CSI information to the base station. Providing A-CSI feedback using PUCCH can also reduce latency and increase reliability.

[0261] It should be understood that the specific order or hierarchy of blocks in the disclosed processes / flowcharts is illustrative of example methods. Based on design preferences, it is understood that the specific order or hierarchy of blocks in the processes / flowcharts may be rearranged. In addition, some blocks may be combined or omitted. The accompanying method claims present elements of various blocks in an example order and are not meant to be limited to the specific order or hierarchy presented.

[0262] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but to conform to the full scope consistent with the language claims, wherein elements mentioned in the singular are not intended to mean "one and only one" unless specifically stated otherwise, but rather "one or more". Terms such as "if", "when" and "while" should be interpreted as "in this case", rather than implying a direct temporal relationship or reaction. That is, these phrases, such as "when", do not mean that action is taken immediately in response to an action or during the occurrence of an action, but simply mean that an action will occur if a condition is met, but does not require a specific or immediate time limit for the occurrence of the action. The word "exemplary" is used in this article to mean "serving as an example, instance or illustration". Any aspect described herein as "exemplary" is not necessarily to be interpreted as superior to or preferred over other aspects. Unless otherwise specifically stated, the term "some" refers to one or more. Combinations such as “at least one of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B, and C,” “one or more of A, B, and C,” and “A, B, C, or any combination thereof” include any combination of A, B, and / or C, and may include multiple A, multiple B, or multiple C. Specifically, combinations such as “at least one of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B, and C,” “one or more of A, B, and C,” and “A, B, C, or any combination thereof” may be only A, only B, only C, A and B, A and C, B and C, or A and B and C, where any such combination may include one or more members of A, B, or C. All structural and functional equivalents to the elements of the various aspects described in this disclosure that are known or later become known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is expressly recited in the claims. Words such as “module,” “mechanism,” “element,” and “device” are not intended to be substituted for the word “unit.” Thus, no claim element should be construed as means-plus-function unless the element is expressly recited using the phrase "a means for..."

[0263] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein, but are not limiting.

[0264] Aspect 1 is a method for wireless communication at a UE, comprising: receiving a schedule to provide multiple A-CSI reports while giving up A-CSI multiplexing, the schedule being for at most two A-CSI reports in the same time slot for the UE, and the multiple A-CSI reports not overlapping in time in the same time slot; and sending the multiple A-CSI reports to a base station in corresponding PUCCHs in the same time slot while giving up CSI multiplexing.

[0265] Aspect 2 is the method of aspect 1, further comprising: receiving, from the base station, an RRC configuration that does not include a parameter for enabling CSI multiplexing.

[0266] Aspect 3 is the method of any one of aspects 1 and 2, further comprising RRC configuring not including a multiplexing CSIP PUCCH resource parameter indicating one or more PUCCH resources configured for the UE.

[0267] Aspect 4 is an apparatus for wireless communication at a UE, comprising at least one processor coupled to a memory and configured to implement any one of aspects 1 to 3.

[0268] Aspect 5 is an apparatus for wireless communication, comprising means for implementing any one of aspects 1 to 3.

[0269] Aspect 6 is a non-transitory computer-readable storage medium storing computer-executable code, wherein the code causes a processor to implement any one of aspects 1 to 3 when executed.

[0270] Aspect 7 is a method for wireless communication at a base station, comprising scheduling a UE to provide multiple A-CSI reports while abandoning A-CSI multiplexing; scheduling at most two A-CSI reports for the UE in the same time slot, and the multiple A-CSI reports do not overlap in time in the same time slot; and receiving multiple A-CSI reports from the UE in a corresponding PUCCH.

[0271] Aspect 8 is the method of aspect 7, further including: sending an RRC configuration that does not include a parameter for enabling CSI multiplexing to the UE.

[0272] Aspect 9 is the method of any one of aspects 7 and 8, further comprising RRC configuring not including a multiplexing CSIP UCCH resource parameter indicating one or more PUCCH resources configured for the UE.

[0273] Aspect 10 is an apparatus for wireless communication at a base station, comprising at least one processor coupled to a memory and configured to implement any one of aspects 7 to 9.

[0274] Aspect 11 is an apparatus for wireless communication, comprising means for implementing any one of aspects 7 to 9.

[0275] Aspect 12 is a non-transitory computer-readable storage medium storing computer-executable code, wherein the code, when executed, causes a processor to implement any one of aspects 7 to 9.

[0276] Aspect 13 is a method for wireless communication at a UE, comprising receiving a downlink grant that schedules the UE to provide an A-CSI report, the downlink grant including at least one of a counter DAI associated with the A-CSI report and a total number DAI associated with the A-CSI report, the counter DAI indicating an index of the A-CSI report in an A-CSI codebook for multiplexing multiple A-CSI reports, the total number DAI indicating the total number of A-CSI reports multiplexed in a PUCCH resource; and sending the CSI report to a base station in the PUCCH based on the downlink grant.

[0277] Aspect 14 is the method of aspect 13, further comprising: the total number of DAI code points indicating that CSI multiplexing is being scheduled for the UE, the CSI multiplexing including multiplexing the A-CSI report with a second A-CSI report.

[0278] Aspect 15 is the method of any of aspects 13 and 14, further comprising a combination of the total number of DAI code points and the counter DAI indicating at least one of CSI multiplexing being scheduled for the UE and the amount of CSI reports to be multiplexed in the same PUCCH transmission.

[0279] Aspect 16 is the apparatus of any one of aspects 13 to 15, further comprising the downlink grant comprising at least one bit indicating that CSI multiplexing is being scheduled for the UE, the CSI multiplexing comprising multiplexing the A-CSI report with a second A-CSI report.

[0280] Aspect 17 is the apparatus of any one of aspects 13 to 16, further comprising: receiving a radio resource control configuration including a parameter for enabling CSI multiplexing, the parameter for enabling CSI multiplexing indicating one or more PUCCH resources associated with the UE for sending multiplexed CSI reports.

[0281] Aspect 18 is the apparatus of any one of aspects 13 to 17, further comprising: the PUCCH resource being included in one or more PUCCH resources, and the PUCCH resource being selected based on a payload size of the multiplexed CSI report.

[0282] Aspect 19 is the apparatus of any one of aspects 13 to 18, further comprising: receiving a schedule to multiplex the A-CSI report with one or more HARQ-ACK feedbacks.

[0283] Aspect 20 is the apparatus of any one of aspects 13 to 19, further comprising a PUCCH resource indicator in the last downlink grant indicating a second PUCCH resource associated with an A-CSI report multiplexed with one or more HARQ-ACK feedbacks.

[0284] Aspect 21 is an apparatus of any one of Aspects 13 to 20, further comprising the UE receiving multiple PRI values in each downlink grant, a first PRI value associated with one or more HARQ-ACK feedbacks and a second PRI value associated with an A-CSI report, and wherein the UE sends an A-CSI report multiplexed with the one or more HARQ-ACK feedbacks based on a last indicated PRI value among the first PRI value and the second PRI value.

[0285] Aspect 22 is an apparatus of any one of aspects 13 to 21, further comprising the UE receiving, in each downlink grant, a first counter DAI associated with the A-CSI report, a first total DAI associated with the A-CSI report, a second counter DAI associated with one or more HARQ-ACK feedbacks, and a second total DAI associated with the one or more HARQ-ACK feedbacks, and wherein the CSI report includes a concatenation of one or more HARQ-ACK feedbacks based on the first codebook and an A-CSI report based on the second codebook.

[0286] Aspect 23 is an apparatus of any aspect 13 to 22, further comprising: after receiving a downlink authorization for scheduling a UE to provide an A-CSI report, receiving a downlink control channel for scheduling a first HARQ-ACK feedback, the downlink control channel for scheduling the first HARQ-ACK feedback including an indication of multiplexing one or more HARQ-ACK feedbacks with the A-CSI report.

[0287] Aspect 24 is the apparatus of any one of Aspects 13 to 23, further comprising: the third PUCCH resource associated with the first HARQ-ACK feedback is indicated by a HARQ-ACK PUCCH resource indicator in the last physical downlink control channel that schedules the first HARQ-ACK feedback.

[0288] Aspect 25 is an apparatus for wireless communication at a UE, comprising at least one processor coupled to a memory and configured to implement any one of aspects 13 to 24.

[0289] Aspect 26 is an apparatus for wireless communication, comprising means for implementing any one of aspects 13 to 24.

[0290] Aspect 27 is a non-transitory computer-readable storage medium storing computer-executable code, wherein the code, when executed, causes a processor to implement any one of aspects 13 to 24.

[0291] Aspect 28 is a method for wireless communication at a base station, comprising: sending a downlink grant that schedules a UE to provide an A-CSI report, the downlink grant including at least one of a counter DAI associated with the A-CSI report and a total number DAI associated with the A-CSI report, the counter DAI indicating an index of the A-CSI report in an A-CSI codebook for multiplexing multiple A-CSI reports, and the total number DAI indicating the total number of A-CSI reports multiplexed in a PUCCH resource; and receiving a CSI report from the UE in a PUCCH based on the downlink grant.

[0292] Aspect 29 is the method of aspect 28, further comprising a total number of DAI code points indicating that CSI multiplexing is being scheduled for the UE, the CSI multiplexing including multiplexing the A-CSI report with a second A-CSI report.

[0293] Aspect 30 is the method of any of aspects 28 and 29, further comprising a combination of the total number of DAI code points and the counter DAI indicating at least one of CSI multiplexing being scheduled for the UE and an amount of CSI reports to be multiplexed in the same PUCCH transmission.

[0294] Aspect 31 is the apparatus of any one of aspects 28 to 30, further comprising the downlink grant comprising at least one bit indicating that CSI multiplexing is being scheduled for the UE, the CSI multiplexing comprising multiplexing the A-CSI report with a second A-CSI report.

[0295] Aspect 32 is the apparatus of any one of aspects 28 to 31, further comprising: sending a radio resource control configuration with a parameter enabling CSI multiplexing to the UE, the parameter indicating one or more PUCCH resources for sending the multiplexed A-CSI report.

[0296] Aspect 33 is the apparatus of any one of aspects 28 to 32, further comprising: the PUCCH resource being included in one or more PUCCH resources, and the PUCCH resource accommodating a payload size of the multiplexed A-CSI report.

[0297] Aspect 34 is the apparatus of any one of aspects 28 to 33, further comprising: sending a schedule to multiplex the A-CSI report with one or more HARQ-ACK feedbacks.

[0298] Aspect 35 is the apparatus of any one of aspects 28 to 34, further comprising a PUCCH resource indicator in the last downlink grant indicating a second PUCCH resource associated with an A-CSI report multiplexed with one or more HARQ-ACK feedbacks.

[0299] Aspect 36 is an apparatus of any of Aspects 28 to 35, further comprising the base station indicating multiple PRI values in each downlink grant, a first PRI value associated with one or more HARQ-ACK feedbacks and a second PRI value associated with an A-CSI report, and wherein the base station receives an A-CSI report multiplexed with the one or more HARQ-ACK feedbacks from the UE based on the last indicated PRI value of the first PRI value and the second PRI value.

[0300] Aspect 37 is an apparatus of any one of aspects 28 to 36, further comprising the base station indicating, in each downlink grant, a first counter DAI associated with the A-CSI report, a first total DAI associated with the A-CSI report, a second counter DAI associated with one or more HARQ-ACK feedbacks, and a second total DAI associated with the one or more HARQ-ACK feedbacks, and wherein the CSI report includes a concatenation of one or more HARQ-ACK feedbacks based on the first codebook and an A-CSI report based on the second codebook.

[0301] Aspect 38 is an apparatus of any one of Aspects 28 to 37, further comprising: after sending a downlink grant for scheduling a UE to provide an A-CSI report, sending a downlink control channel for scheduling a first HARQ-ACK feedback, the downlink control channel for scheduling the first HARQ-ACK feedback including an indication of multiplexing one or more HARQ-ACK feedbacks with the A-CSI report.

[0302] Aspect 39 is the apparatus of any one of Aspects 28 to 38, further comprising: the third PUCCH resource associated with the first HARQ-ACK feedback is indicated by a HARQ-ACK PUCCH resource indicator in the last physical downlink control channel that schedules the first HARQ-ACK feedback.

[0303] Aspect 40 is an apparatus for wireless communication at a base station, comprising at least one processor coupled to a memory and configured to implement any one of aspects 28 to 39.

[0304] Aspect 41 is an apparatus for wireless communication, comprising means for implementing any one of aspects 28 to 39.

[0305] Aspect 42 is a non-transitory computer-readable storage medium storing computer-executable code, wherein the code, when executed, causes a processor to implement any one of aspects 28 to 39.

Claims

1. A method for wireless communication at a user equipment (UE), comprising: receiving a downlink grant that schedules a UE to provide an aperiodic channel state information (A-CSI) report, the downlink grant comprising at least one of a counter downlink allocation indicator (DAI) associated with the A-CSI report and a total number DAI associated with the A-CSI report, the counter DAI indicating an index of the A-CSI report in an A-CSI codebook used for multiplexing a plurality of A-CSI reports, and the total number DAI indicating a total number of A-CSI reports multiplexed in a physical uplink control channel (PUCCH) resource; as well as A CSI report is sent to a base station in a PUCCH based on the downlink grant.

2. The method according to claim 1, wherein The total number of DAI code points indicates that CSI multiplexing is being scheduled for the UE, the CSI multiplexing including multiplexing the A-CSI report with a second A-CSI report.

3. The method according to claim 2, wherein: The combination of the total number of DAI code points and the counter DAI indicates at least one of the following: The CSI multiplexing is being scheduled for the UE, and The number of CSI reports to be multiplexed in the same PUCCH transmission.

4. The method according to claim 1, wherein The downlink grant includes at least one bit indicating that CSI multiplexing is being scheduled for the UE, the CSI multiplexing including multiplexing the A-CSI report with a second A-CSI report.

5. The method of claim 1 , further comprising: A radio resource control configuration is received including a parameter enabling CSI multiplexing, the parameter enabling the CSI multiplexing indicating one or more PUCCH resources associated with the UE for sending a multiplexed CSI report.

6. The method according to claim 5, wherein: The PUCCH resource is included in the one or more PUCCH resources, and the PUCCH resource is selected based on a payload size of the multiplexed CSI report.

7. The method of claim 1 , further comprising: A schedule is received to multiplex the A-CSI report with one or more hybrid automatic repeat request acknowledgement (HARQ-ACK) feedbacks.

8. The method of claim 7, wherein: The PUCCH resource indicator in the last downlink grant indicates a second PUCCH resource associated with the A-CSI report multiplexed with the one or more HARQ-ACK feedbacks.

9. The method of claim 7, wherein: The UE receives, in each downlink grant, a plurality of PUCCH resource indicator (PRI) values, a first PRI value associated with the one or more HARQ-ACK feedbacks, and a second PRI value associated with the A-CSI report, and wherein the UE sends the A-CSI report multiplexed with the one or more HARQ-ACK feedbacks based on a last indicated PRI value of the first PRI value and the second PRI value.

10. The method of claim 7, wherein: The UE receives, in each downlink grant, a first counter DAI associated with the A-CSI report, a first total DAI associated with the A-CSI report, a second counter DAI associated with the one or more HARQ-ACK feedbacks, and a second total DAI associated with the one or more HARQ-ACK feedbacks, and wherein the CSI report includes a concatenation of the one or more HARQ-ACK feedbacks based on a first codebook and the A-CSI report based on a second codebook.

11. The method of claim 7, further comprising: After receiving the downlink grant scheduling the UE to provide the A-CSI report, a downlink control channel scheduling a first HARQ-ACK feedback is received, the downlink control channel scheduling the first HARQ-ACK feedback including an indication to multiplex the one or more HARQ-ACK feedbacks with the A-CSI report.

12. The method of claim 11, wherein: The third PUCCH resource associated with the first HARQ-ACK feedback is indicated by a HARQ-ACK PUCCH resource indicator in the last physical downlink control channel scheduling the first HARQ-ACK feedback.

13. A method for wireless communication at a base station, comprising: transmitting a downlink grant that schedules a user equipment (UE) to provide an aperiodic channel state information (A-CSI) report, the downlink grant comprising at least one of a counter downlink allocation indicator (DAI) associated with the A-CSI report and a total number DAI associated with the A-CSI report, the counter DAI indicating an index of the A-CSI report in an A-CSI codebook used for multiplexing a plurality of A-CSI reports, and the total number DAI indicating a total number of A-CSI reports multiplexed in a physical uplink control channel (PUCCH) resource; as well as A CSI report is received from the UE in a PUCCH based on the downlink grant.

14. The method of claim 13, wherein: The total number of DAI code points indicates that CSI multiplexing is being scheduled for the UE, the CSI multiplexing including multiplexing the A-CSI report with a second A-CSI report.

15. The method of claim 14, wherein: The combination of the total number of DAI code points and the counter DAI indicates at least one of the following: The CSI multiplexing is being scheduled for the UE, and The number of CSI reports to be multiplexed in the same PUCCH transmission.

16. The method of claim 13, wherein: The downlink grant includes at least one bit indicating that CSI multiplexing is being scheduled for the UE, the CSI multiplexing including multiplexing the A-CSI report with a second A-CSI report.

17. The method of claim 13, further comprising: A radio resource control configuration with parameters enabling CSI multiplexing is sent to the UE, the parameters indicating one or more PUCCH resources for sending multiplexed A-CSI reports.

18. The method of claim 17, wherein: The PUCCH resource is included in the one or more PUCCH resources, and the PUCCH resource accommodates a payload size of the multiplexed A-CSI report.

19. The method of claim 13, further comprising: A schedule is sent to multiplex the A-CSI report with one or more hybrid automatic repeat request acknowledgement (HARQ-ACK) feedbacks.

20. The method of claim 19, wherein: The PUCCH resource indicator in the last downlink grant indicates a second PUCCH resource associated with the A-CSI report multiplexed with the one or more HARQ-ACK feedbacks.

21. The method of claim 19, wherein: The base station indicates, in each downlink grant, a plurality of PUCCH resource indicator (PRI) values, a first PRI value associated with the one or more HARQ-ACK feedbacks, and a second PRI value associated with the A-CSI report, and wherein the base station receives, from the UE, the A-CSI report multiplexed with the one or more HARQ-ACK feedbacks based on a last indicated PRI value of the first PRI value and the second PRI value.

22. The method of claim 19, wherein: The base station indicates, in each downlink grant, a first counter DAI associated with the A-CSI report, a first total DAI associated with the A-CSI report, a second counter DAI associated with the one or more HARQ-ACK feedbacks, and a second total DAI associated with the one or more HARQ-ACK feedbacks, and wherein the CSI report includes a concatenation of the one or more HARQ-ACK feedbacks based on a first codebook and the A-CSI report based on a second codebook.

23. The method of claim 19, further comprising: After sending the downlink grant scheduling the UE to provide the A-CSI report, sending a downlink control channel scheduling a first HARQ-ACK feedback, the downlink control channel scheduling the first HARQ-ACK feedback including an indication to multiplex the one or more HARQ-ACK feedbacks with the A-CSI report.

24. The method of claim 23, wherein: The third PUCCH resource associated with the first HARQ-ACK feedback is indicated by a HARQ-ACK PUCCH resource indicator in the last physical downlink control channel scheduling the first HARQ-ACK feedback.

25. An apparatus for wireless communication at a user equipment (UE), comprising: Memory; as well as at least one processor coupled to the memory, the at least one processor configured to: receiving a downlink grant that schedules a UE to provide an aperiodic channel state information (A-CSI) report, the downlink grant comprising at least one of a counter downlink allocation indicator (DAI) associated with the A-CSI report and a total number DAI associated with the A-CSI report, the counter DAI indicating an index of the A-CSI report in an A-CSI codebook used for multiplexing a plurality of A-CSI reports, and the total number DAI indicating a total number of A-CSI reports multiplexed in a physical uplink control channel (PUCCH) resource; as well as A CSI report is sent to a base station in a PUCCH based on the downlink grant.

26. An apparatus for wireless communication at a base station, comprising: Memory; as well as at least one processor coupled to the memory, the at least one processor configured to: transmitting a downlink grant that schedules a user equipment (UE) to provide an aperiodic channel state information (A-CSI) report, the downlink grant comprising at least one of a counter downlink allocation indicator (DAI) associated with the A-CSI report and a total number DAI associated with the A-CSI report, the counter DAI indicating an index of the A-CSI report in an A-CSI codebook used for multiplexing a plurality of A-CSI reports, and the total number DAI indicating a total number of A-CSI reports multiplexed in a physical uplink control channel (PUCCH) resource; as well as A CSI report is received from the UE in a PUCCH based on the downlink grant.

27. The apparatus according to claim 26, further comprising: at least one transceiver coupled to the at least one processor, wherein the at least one processor is configured to: A schedule is sent to multiplex the A-CSI report with one or more hybrid automatic repeat request acknowledgement (HARQ-ACK) feedbacks.

28. The apparatus of claim 27, wherein: The at least one processor is further configured to: After sending the downlink grant scheduling the UE to provide the A-CSI report, sending a downlink control channel scheduling a first HARQ-ACK feedback, the downlink control channel scheduling the first HARQ-ACK feedback including an indication to multiplex the one or more HARQ-ACK feedbacks with the A-CSI report.

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