Timeline and resource allocation for CSI reports triggered by downlink

Abstract

The User Equipment (UE) receives downlink communication that triggers a Channel State Information (CSI) report. The UE then determines whether to report the CSI along with a Hybrid Automatic Repeat Request (HARQ) feedback. Based on this determination, the UE then sends both the CSI and HARQ feedback.

Description

Technical Field

[0001] In summary, this disclosure relates to communication systems, and more specifically, to wireless communications involving channel state information reporting. Background Technology

[0002] Wireless communication systems are widely deployed to provide a variety of telecommunications services such as telephone, video, data, messaging, and broadcasting. 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.

[0003] These multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different wireless devices to communicate at the city, country, region, and even global levels. An example telecommunications standard is 5G New Radio (NR). 5G NR is part of the continuous evolution of mobile broadband released by the 3rd Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with 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 can be based on the 4G Long Term Evolution (LTE) standard. There is a need for further improvements to 5G NR technology. These improvements can also be applied to other multiple access technologies and telecommunications standards that adopt them. Summary of the Invention

[0004] The following is a simplified overview of one or more aspects to provide a basic understanding of such aspects. This overview is not an exhaustive summary of all anticipated aspects and is not intended to identify key or important elements of all aspects, nor to depict 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 descriptions given later.

[0005] This paper presents various aspects that improve the ability of base stations to perform faster and more accurate adaptation of modulation and coding schemes (MCS), code rates, and / or transmission power by implementing Channel State Information (CSI) reports that are reported together with Hybrid Automatic Repeat Request (HARQ) feedback.

[0006] In one aspect of this disclosure, a method, computer-readable medium, and apparatus for wireless communication at a user equipment (UE) are provided. The apparatus receives downlink communication that triggers a CSI report. The apparatus determines whether to report the CSI together with a Hybrid Automatic Repeat Request (HARQ) feedback. The apparatus transmits the CSI and HARQ feedback based on the determination of whether to report the CSI together with the HARQ feedback.

[0007] In one aspect of this disclosure, a method, computer-readable medium, and apparatus for wireless communication at a base station are provided. The apparatus transmits downlink communication that triggers a CSI report. The apparatus instructs a UE whether to report the CSI together with HARQ feedback. The apparatus receives the CSI and HARQ feedback based on this instruction.

[0008] To achieve the foregoing and related objectives, one or more aspects include the features fully described below and specifically pointed out in the claims. The following description and drawings set forth certain illustrative features of one or more aspects in detail. However, these features indicate only a few of the various ways in which the principles of each aspect can be employed, and this description is intended to include all such aspects and their equivalents. Attached Figure Description

[0009] Figure 1 This is a diagram illustrating an example of a wireless communication system and access network.

[0010] Figure 2A , Figure 2B , Figure 2C and Figure 2D This is a diagram showing examples of the DL channel in the first 5G / NR frame, the second 5G / NR frame, and the UL channel in the 5G / NR subframe.

[0011] Figure 3 This is a diagram illustrating examples of base stations and user equipment (UEs) in an access network.

[0012] Figure 4A and Figure 4B This is a sample timeline for HARQ-ACK / NACK and HARQ-ACK / NACK used in conjunction with CSI / CQI reports.

[0013] Figure 5 This is a sample CSI report framework.

[0014] Figure 6 This is a sample timeline for A-CSI reports on PUSCH.

[0015] Figure 7This is an example CSI report timeline illustrating the relationship between HARQ-ACK preparation and CSI reporting.

[0016] Figure 8 This is an example communication flow between the UE and the base station.

[0017] Figure 9 This is a flowchart of a wireless communication method at the user equipment.

[0018] Figure 10 This is a conceptual data flow diagram illustrating the data flow between different units / components in the example device.

[0019] Figure 11 This is a diagram illustrating an example of a hardware implementation for a device employing a processing system.

[0020] Figure 12 This is a flowchart of the wireless communication method at the base station.

[0021] Figure 13 This is a diagram illustrating an example of CSI reporting pattern determination.

[0022] Figure 14 This is a conceptual data flow diagram illustrating the data flow between different units / components in the example device.

[0023] Figure 15 This is a diagram illustrating an example of a hardware implementation for a device employing a processing system. Detailed Implementation

[0024] The detailed description below, taken in conjunction with the accompanying drawings, is intended to describe various configurations and not to represent only the configurations in which the concepts described herein can be implemented. The detailed description includes specific details for the purpose of providing a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts can be implemented without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring such concepts.

[0025] Several aspects of a telecommunications system will now be described with reference to various apparatuses and methods. These apparatuses and methods will be described in detail below and illustrated in the accompanying drawings, by way of various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using electronic hardware, computer software, or any combination thereof. Whether such an element is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0026] For example, an element, any part of an element, or any combination of elements can be implemented as a "processing system" that includes 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, system-on-a-chip (SoCs), baseband processors, field-programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functions described throughout this disclosure. One or more processors in a processing system can execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, software should be interpreted broadly as meaning instructions, instruction sets, code, code segments, program code, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc.

[0027] Accordingly, in one or more example embodiments, the described functionality can be implemented using hardware, software, or any combination thereof. If implemented in software, the functionality can be stored on a computer-readable medium or encoded as one or more instructions or code on a computer-readable medium. A computer-readable medium includes a computer storage medium. The storage medium can be any available medium accessible by a computer. By way of example, and not limitation, such a computer-readable medium can include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of computer-readable media of the foregoing types, or any other medium capable of storing computer-executable code in the form of computer-accessible instructions or data structures.

[0028] Figure 1 This is a diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) includes a base station 102, a user interface unit (UE) 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)). Base station 102 may include macro cells (high-power cellular base stations) and / or small cells (low-power cellular base stations). Macro cells include base stations. Small cells include femtocells, picocells, and microcells.

[0029] Base station 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with EPC 160 via a first backhaul link 132 (e.g., S1 interface). Base station 102 configured for 5G NR (collectively referred to as Next Generation RAN (NG-RAN)) can interface with core network 190 via a second backhaul link 184. Among other functions, base station 102 can also perform one or more of the following functions: 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, location, and delivery of warning messages. Base station 102 can communicate with each other directly or indirectly (e.g., via EPC 160 or core network 190) via a third backhaul link 134 (e.g., an X2 interface). The third backhaul link 134 can be wired or wireless.

[0030] Base station 102 can communicate wirelessly with UE 104. Each base station 102 in the base station 102 can provide communication coverage for a corresponding geographic coverage area 110. Overlapping geographic coverage areas 110 may exist. For example, a small cell 102' may have a coverage area 110' that overlaps with the coverage areas 110 of one or more macro base stations 102. A network that includes both small cells and macro cells can be referred to as a heterogeneous network. The heterogeneous network may also include evolved home node B (eNB) (HeNB), which can provide services to a restricted group referred to as a closed subscriber group (CSG). The communication link 120 between base station 102 and UE 104 may include uplink (UL) (also referred to as reverse link) transmission from UE 104 to base station 102 and / or downlink (DL) (also referred to as forward link) transmission from base station 102 to UE 104. The communication link 120 may use multiple-input multiple-output (MIMO) antenna technology, which includes spatial multiplexing, beamforming, and / or transmit diversity. The communication link can be via one or more carriers. Base station 102 / UE 104 can use a spectrum of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc.) bandwidth per carrier allocated in carrier aggregation for transmission in each direction, up to a total of YxMHz (x component carriers). Carriers can be adjacent to each other or can be non-adjacent. Carrier allocation can be asymmetric relative to DL and UL (e.g., more or fewer carriers can be allocated to DL compared to UL). Component carriers can include primary component carriers and one or more secondary component carriers. The primary component carrier can be referred to as the primary cell (PCell), and the secondary component carriers can be referred to as secondary cells (SCells).

[0031] Some UEs 104 can communicate with each other using device-to-device (D2D) communication link 158. D2D communication link 158 can use DL / UL WWAN spectrum. D2D communication link 158 can use one or more sideline channels, such as the Physical Sideline Broadcast Channel (PSBCH), Physical Sideline Discovery Channel (PSDCH), Physical Sideline Shared Channel (PSSCH), and Physical Sideline Control Channel (PSCCH). D2D communication can be achieved through a variety of wireless D2D communication systems, such as WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

[0032] 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 in the 5 GHz unlicensed spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a free channel assessment (CCA) before communication to determine whether the channel is available.

[0033] Small cell 102' can operate in licensed and / or unlicensed spectrum. When operating in unlicensed spectrum, small cell 102' can employ NR and use the same 5GHz unlicensed spectrum as the Wi-Fi AP 150. Small cell 102' employing NR in unlicensed spectrum can improve access network coverage and / or increase access network capacity.

[0034] Base station 102 (whether it is a small cell 102' or a large cell (e.g., a macro base station)) may include and / or be referred to as an eNB, gNodeB (gNB), or another type of base station. Some base stations (such as gNB 180) may operate in the conventional sub-6GHz spectrum, in millimeter wave (mmW) frequencies, and / or near-mmW frequencies to communicate with UE 104. When gNB 180 operates in mmW or near-mmW frequencies, gNB 180 may be referred to as an mmW base station. Extremely high frequency (EHF) is a portion of the electromagnetic spectrum of radio frequency (RF). EHF has a range from 30GHz to 300GHz and has wavelengths between 1mm and 10mm. Radio waves in this band may be referred to as millimeter waves. Near-mmW can extend down to frequencies of 3GHz with wavelengths of 100mm. Ultra-high frequency (SHF) bands extend between 3GHz and 30GHz and are also referred to as centimeter waves. Communication using mmW / near mmW radio frequency (RF) bands (e.g., 3 GHz–300 GHz) suffers from extremely high path loss and short range. mmW base station 180 can utilize beamforming 182 with UE 104 to compensate for the extremely high path loss and short range. Base station 180 and UE 104 may each include multiple antennas (such as antenna elements, antenna panels, and / or antenna arrays) to facilitate beamforming.

[0035] Base station 180 can transmit beamformed signals to UE 104 in one or more transmit directions 182'. UE 104 can receive beamformed signals from base station 180 in one or more receive directions 182'. UE 104 can also transmit beamformed signals to base station 180 in one or more transmit directions. Base station 180 can receive beamformed signals from UE 104 in one or more receive directions. Base station 180 / UE 104 can perform beam training to determine the optimal receive and transmit directions for each of base station 180 / UE 104. The transmit and receive directions of base station 180 can be the same or different. The transmit and receive directions of UE 104 can be the same or different.

[0036] EPC 160 may include Mobility Management Entity (MME) 162, other MMEs 164, Serving Gateway 166, Multimedia Broadcast Multicast Service (MBMS) Gateway 168, Broadcast Multicast Service Center (BM-SC) 170, and Packet Data Network (PDN) Gateway 172. MME 162 can communicate with Home Subscriber Server (HSS) 174. MME 162 is the control node that handles signaling between UE 104 and EPC 160. Typically, MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through Serving Gateway 166, which is itself connected to PDN Gateway 172. PDN Gateway 172 provides IP address allocation and other functions to the UE. PDN Gateway 172 and BM-SC 170 are connected to IP Service 176. IP Service 176 may include the Internet, intranet, IP Multimedia Subsystem (IMS), PS streaming service, and / or other IP services. The BM-SC 170 can provide services provisioning and delivery for MBMS users. It can act as an entry point for MBMS transmissions by content providers, authorize and initiate MBMS bearer services within a Public Land Mobile Network (PLMN), and schedule MBMS transmissions. The MBMS gateway 168 can distribute MBMS services to base stations 102 belonging to Multicast-Broadcast Single Frequency Network (MBSFN) areas belonging to broadcast-specific services, and can be responsible for session management (start / stop) and collecting billing information related to eMBMS.

[0037] 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. AMF 192 may communicate with a Unified Data Management (UDM) 196. AMF 192 is the control node that processes signaling between UE 104 and core network 190. Typically, AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are transmitted through UPF 195. UPF 195 provides IP address allocation and other functions to the UE. UPF 195 connects to IP service 197. IP service 197 may include the Internet, intranet, IP Multimedia Subsystem (IMS), Packet Switched (PS) Streaming (PSS) service, and / or other IP services.

[0038] Base stations may include and / or be referred to as gNB, Node B, eNB, access point, base transceiver, wireless base station, wireless transceiver, transceiver functional unit, Basic Services Set (BSS), Extended Services Set (ESS), Transmitter Receiver Point (TRP), or some other suitable term. Base station 102 provides UE 104 with access to EPC 160 or core network 190. Examples of UE 104 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radio units, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet devices, smart devices, wearable devices, vehicles, electricity meters, air pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or any other similarly functional devices. Some UE 104 devices may be referred to as IoT devices (e.g., parking meters, air pumps, toasters, vehicles, heart monitors, etc.). UE 104 may also be referred to as a station, mobile station, user station, mobile unit, user unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile user station, access terminal, mobile terminal, radio terminal, remote terminal, mobile phone, user agent, mobile client, client, or some other suitable term.

[0039] Refer again Figure 1In some aspects, UE 104 may include a downlink CSI reporting component 198 configured to send a CSI report to base station 102 or 180. The downlink CSI reporting component 198 may be configured to receive downlink communication from base station 102 or 180 that triggers the CSI report. The downlink CSI reporting component 198 may then be configured to determine whether to report the CSI along with Hybrid Automatic Repeat Request (HARQ) feedback. The downlink CSI reporting component 198 may then be configured to send both the CSI and HARQ feedback based on the determination of whether to report the CSI along with HARQ feedback. This event may be an autonomous event determined by the UE, or it may be based on configuration from the base station. Base station 102 or 180 may include a CSI report determination component 199 that configures UE 104 for uplink CSI reporting from UE 104.

[0040] Figure 2A Figure 200 shows an example of the first subframe within a 5G / NR frame structure. Figure 2B Figure 230 shows an example of a DL channel within a 5G / NR subframe. Figure 2C Figure 250 shows an example of a second subframe within a 5G / NR frame structure. Figure 2D Figure 280 illustrates an example of a UL channel within a 5G / NR subframe. The 5G / NR frame structure can be Frequency Division Duplex (FDD) (where subframes within a specific set of subcarriers (carrier system bandwidth) are dedicated to either DL or UL), or Time Division Duplex (TDD) (where subframes within a specific set of subcarriers (carrier system bandwidth) are dedicated to both DL and UL). In the process of... Figure 2A , Figure 2C In the provided example, the 5G / NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (mostly DL), where D is DL, U is UL, and X is flexibly usable between DL / UL, and subframe 3 is configured with slot format 34 (mostly UL). Although subframes 3 and 4 are shown using slot format 34 and slot format 28 respectively, any particular subframe can be configured with any of the various available slot formats 0-61. Slot format 0 and slot format 1 are full DL and full UL respectively. Other slot formats 2-61 include a mixture of DL, UL, and flexible symbols. The UE is configured with a slot format via the received Slot Format Indicator (SFI) (dynamically configured via DL Control Information (DCI) or semi-statically / statically configured via Radio Resource Control (RRC) signaling). Note that the following description also applies to the 5G / NR frame structure as TDD.

[0041] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10 ms) can be divided into 10 equal-sized subframes (1 ms). Each subframe may include one or more time slots. Subframes may also include micro-time slots, which may contain 7, 4, or 2 symbols. Each time slot may contain 7 or 14 symbols, depending on the time slot configuration. For time slot configuration 0, each time slot may contain 14 symbols, while for time slot configuration 1, each time slot may contain 7 symbols. Symbols on the DL can be Cyclic Prefix (CP) OFDM (CP-OFDM) symbols. Symbols on the UL can be CP-OFDM symbols (for high-throughput scenarios) or Discrete Fourier Transform (DFT) Spread Spectrum OFDM (DFT-s-OFDM) symbols (also known as Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols) (for power-constrained scenarios; limited to single-stream transmission). The number of time slots within a subframe is based on the time slot configuration and the numbering scheme. For slot configuration 0, different digital schemes μ0 to μ5 allow 1, 2, 4, 8, 16, and 32 slots per subframe, respectively. For slot configuration 1, different digital schemes 0 to μ2 allow 2, 4, and 8 slots per subframe, respectively. Correspondingly, for slot configuration 0 and digital scheme μ, there are 14 symbols / slot and 2... μ Each time slot / subframe. Subcarrier spacing and symbol length / duration are functions of the digital scheme. Subcarrier spacing can be equal to 2. μ *15kHz, where μ is the digital scheme from 0 to 5. Therefore, digital scheme μ = 0 has a subcarrier spacing of 15kHz, and digital scheme μ = 5 has a subcarrier spacing of 480kHz. The symbol length / duration is inversely related to the subcarrier spacing. Figures 2A-2D Examples are provided for slot configuration 0 with 14 symbols per slot and 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.

[0042] A resource grid can be used to represent frame structure. Each time slot includes a resource block (RB) (also known as a physical RB (PRB)), which extends 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried through each RE depends on the modulation scheme.

[0043] like Figure 2A As shown, some of the REs carry reference (pilot) signals (RS) for the UE. The RS may include a demodulated RS (DM-RS) for channel estimation at the UE (indicated as R for a specific configuration). x(Where 100x is the port number, but other DM-RS configurations are possible) and Channel State Information Reference Signal (CSI-RS). RS may also include Beam Measurement RS (BRS), Beam Refinement RS (BRRS), and Phase Tracking RS (PT-RS).

[0044] Figure 2B Examples of various DL channels within a subframe of a frame are shown. The Physical Downlink Control Channel (PDCCH) carries the DCI within one or more Control Channel Elements (CCEs), each CCE comprising nine RE Groups (REGs), each REG comprising four consecutive REs within an OFDM symbol. The Primary Synchronization Signal (PSS) may be located within symbol 2 of a specific subframe of the frame. The PSS is used by the UE 104 to determine subframe / symbol timing and physical layer identity. The Secondary Synchronization Signal (SSS) may be located within symbol 4 of a specific subframe of the frame. The SSS is used by the UE to determine the Physical Layer Cell Identity Group Number and radio frame timing. Based on the Physical Layer Identity and 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 aforementioned DM-RS. The Physical Broadcast Channel (PBCH) (which carries the Master Information Block (MIB)) may logically be grouped with the PSS and SSS to form a Synchronization Signal (SS) / PBCH block. 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 (such as System Information Blocks (SIBs)) that are not transmitted via the PBCH, and paging messages.

[0045] like Figure 2C As shown, some REs in the REs carry DM-RS for channel estimation at the base station (indicated as R for a specific configuration, but other DM-RS configurations are possible). The UE can transmit DM-RS for the Physical Uplink Control Channel (PUCCH) and DM-RS for the Physical Uplink Shared Channel (PUSCH). PUSCH DM-RS can be transmitted in the first one or two symbols preceding the PUSCH. PUCCH DM-RS can be transmitted in different configurations depending on whether a short or long PUCCH is transmitted and the specific PUCCH format used. The UE can transmit a Sounding Reference Signal (SRS). SRS can be transmitted in the last symbol of a subframe. SRS can have a comb structure, and the UE can transmit SRS on one of the combs. SRS can be used by the base station for channel quality estimation to enable frequency-dependent scheduling on the UL.

[0046] Figure 2DExamples of various UL channels within a subframe of a frame are shown. The PUCCH can be positioned as indicated in a configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), and hybrid automatic repeat request (HARQ) ACK / NACK feedback. The PUSCH carries data and can also be used to carry buffer status reports (BSR), power headroom reports (PHR), and / or UCI.

[0047] Figure 3 This is a block diagram illustrating communication between base station 310 and UE 350 in the access network. In the DL, IP packets from EPC160 can be provided to controller / processor 375. Controller / processor 375 implements Layer 3 and Layer 2 functions. Layer 3 includes the Radio Resource Control (RRC) layer, and Layer 2 includes the Serving Data Adaptation Protocol (SDAP) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, and Media Access Control (MAC) layer. The controller / processor 375 provides: RRC layer functions associated with: broadcasting 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 (encryption, decryption, integrity protection, integrity verification), and handover support functions; RLC layer functions associated with: transmission of upper-layer packet data units (PDUs), error correction via ARQ, concatenation, segmentation and reassembly of RLC service data units (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 transport blocks (TBs), and MAC... SDU performs demultiplexing of TB, scheduling information reporting, error correction via HARQ, priority handling, and logical channel prioritization.

[0048] Transmit (TX) processor 316 and receive (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 transport channel, forward error correction (FEC) encoding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. TX processor 316 processes the mapping to the signal constellation diagram 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 encoded and modulated symbols can then be split into parallel streams. Each stream can then be mapped to OFDM subcarriers, multiplexed with reference signals (e.g., pilots) in the time and / or frequency domains, and then combined using inverse fast Fourier transform (IFFT) to produce a physical channel carrying the time-domain OFDM symbol stream. The OFDM stream is spatially precoded to generate multiple spatial streams. The channel estimate from channel estimator 374 can be used to determine the coding and modulation scheme, as well as for spatial processing. The channel estimate can be derived based on a reference signal transmitted by UE 350 and / or channel condition feedback. Each spatial stream can then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX can use the corresponding spatial stream to modulate an RF carrier for transmission.

[0049] At UE 350, each receiver 354RX receives signals through its corresponding antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides this information to the receive (RX) processor 356. The TX processor 368 and RX processor 356 implement Layer 1 functions associated with various signal processing functions. The RX processor 356 can perform spatial processing on this information to recover any spatial stream destined for UE 350. If multiple spatial streams are destined for UE 350, they can be combined by the RX processor 356 into a single OFDM symbol stream. The RX processor 356 then uses a Fast Fourier Transform (FFT) to transform the OFDM symbol stream from the time domain to the frequency domain. The frequency domain signal consists of 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 probable signal constellation points transmitted by base station 310. These soft decisions can be based on channel estimates calculated by channel estimator 358. The soft decision is then decoded and deinterleaved to recover the data and control signals originally transmitted by base station 310 on the physical channel. This data and control signals are then provided to controller / processor 359, which implements layer 3 and layer 2 functions.

[0050] The controller / processor 359 may be associated with a memory 360 that stores program code and data. The memory 360 may be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing, packet reassembly, decryption, header decompression, and control signal processing between transport and logical channels to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection to support HARQ operation using ACK and / or NACK protocols.

[0051] Similar to the functions described in conjunction with DL transmissions performed by base station 310, controller / processor 359 provides: RRC layer functions associated with: system information (e.g., MIB, SIB) capture, 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 via 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 via HARQ, priority handling, and logical channel prioritization.

[0052] The TX processor 368 can use the channel estimate derived by the channel estimator 358 based on a reference signal or feedback transmitted by the base station 310 to select an appropriate coding and modulation scheme and facilitate spatial processing. The spatial stream generated by the TX processor 368 can be provided to different antennas 352 via individual transmitters 354TX. Each transmitter 354TX can use the corresponding spatial stream to modulate an RF carrier for transmission.

[0053] At base station 310, UL transmission is processed in a manner similar to that described in conjunction with the receiver function at UE 350. Each receiver 318RX receives signals through its corresponding antenna 320. Each receiver 318RX recovers the information modulated onto the RF carrier and provides this information to the RX processor 370.

[0054] The controller / processor 375 may be associated with a memory 376 that stores program code and data. The memory 376 may be referred to as a computer-readable medium. In the UL, the controller / processor 375 provides demultiplexing, packet reassembly, decryption, header decompression, and control signal processing between transport and logical channels to recover IP packets from the UE 350. IP packets from the controller / processor 375 can be provided to the EPC 160. The controller / processor 375 is also responsible for error detection to support HARQ operation using ACK and / or NACK protocols.

[0055] At least one of the TX processor 368, RX processor 356, and controller / processor 359 can be configured to perform and Figure 1 All aspects related to 198.

[0056] At least one of the TX processor 316, RX processor 370, and controller / processor 375 can be configured to perform operations related to... Figure 1 All aspects related to 199.

[0057] Figure 4A A sample timeline of HARQ-ACK / NACK reports is shown. A transmission interval (e.g., K0) may occur between DL permission 402 in which the UE receives a transmission (e.g., PDCCH) from the base station and 404 in which the UE receives a PDSCH transmission 404 from the base station based on DL permission 402. The UE can determine the time interval K0 based on tables and / or information in DL permission 402. For example, the UE can determine K0 based on a Time Domain Resource Allocation (TDRA) table in the DL permission, such as for DCI formats 1_0, 1_1, or 1_2. Therefore, information in the PDCCH can be used to determine the transmission interval (i.e., time gap) between the PDCCH transmission (e.g., DL permission 402) and the PDSCH transmission 404. Similarly, the base station can indicate in the DL permission the transmission interval (e.g., K1) between the reception of PDSCH transmission 404 and the reception of a corresponding PUCCH 406 carrying HARQ-ACK feedback for PDSCH 404. For example, DL allows 402 to be based on DCI format 1_0, 1_1 or 1_2.

[0058] In the CSI report, the UE measures various radio channel qualities and reports these measurements to the base station. The base station can then use the CSI report to adjust and improve the transmission quality and efficiency of communication with the UE. When the base station receives a NACK from the UE, it can retransmit the PDSCH and / or PDCCH after a certain period of time. However, since the NACK is not associated with the CSI / CQI report, the base station receiving the NACK may not know the channel quality and / or channel state of the communication. Therefore, the PDSCH (and / or PDCCH) may be retransmitted based on the settings of the previous transmission, because the base station does not know whether adjustments need to be made to the retransmission, such as adapting to different MCS, code rates, and / or transmission power. This increases the amount of time the base station spends adjusting the transmission to the UE.

[0059] Additionally, CSI / CQI reporting (which may be referred to as CSI / CQI feedback) can be based on periodic CSI (e.g., P-CSI) reporting or aperiodic CSI (e.g., A-CSI) reporting. For P-CSI, the UE can report CQI, PMI, and RI via PUCCH or PUSCH, where the reporting period is configured by a higher layer. The UE can cycle through different subbands from one reporting instance to the next reporting instance to reduce overhead. In P-CSI, the reporting period is fixed. For A-CSI, the UE can divide the bandwidth into multiple subbands, select M subbands, and report the CQI of the selected subbands. A-CSI can be used to provide more detailed reporting in a single reporting instance. Reports can be sent on PUSCH, and the reporting timing is triggered by DCI. However, A-CSI is triggered by a separate UL grant, and the timeline for A-CSI reporting may be much slower than the HARQ-ACK timeline. For example, a UE may provide HARQ-ACK feedback and CSI reports in different time slots, even if they are scheduled in the same time slot. This may result in slower adaptation of MCS, code rate, and / or transmission power for retransmissions at the base station.

[0060] Figure 5 An example A-CSI reporting framework 500 is shown. The A-CSI trigger state may include one or more CSI reporting configurations, shown in the figure as CSI reporting configuration 1 to CSI reporting configuration N1. The CSI reporting configuration may be associated with a CSI resource configuration indicating the resource used for the reference signal (e.g., a non-zero power CSI reference signal, a synchronization signal block, a CSI-IM resource), and may also indicate the type of resource (e.g., periodic, non-periodic, semi-persistent). Figure 5CSI resource configurations 1 through M are shown. The CSI report configuration can indicate which resource configurations within the CSI resource configurations will be used for CSI measurements and can be included in a mapping table between measurement types and corresponding CSI resource configuration IDs. BWP information can also be indicated. Figure 5 An example of CSI Report Configuration 1 associated with CSI Resource Configuration 1 and BWP 1 is shown.

[0061] Figure 6 This is a sample timeline 600 used in A-CSI reports. (Example:) Figure 6 As shown, X (e.g., X time slots) represents the time interval between the end of PDCCH transmission 602 that triggers the A-CSI report and the start of CSI-RS transmission 604. The base station can configure each CSI-RS resource via RRC. Figure 6 Y (e.g., Y time slots) is represented as the gap between the end of PDCCH transmission 602 and the start of A-CSI report 606 on PUSCH transmission. The A-CSI report may be uplink control information (UCI) included in the PUSCH transmission. The time slots of Y time slots between PDCCH 602 and A-CSI report 606 may be based on the Time Domain Resource Allocation (TDRA) field in the UL authorization for the corresponding PUSCH transmission. Frequency resources for A-CSI report 606 may be indicated to the UE in the UL authorization (e.g., PDCCH 602) via the Frequency Domain Resource Allocation field.

[0062] The aspects presented in this article improve communication between the base station and the UE by enabling the UE to sometimes determine whether to send CSI reports along with HARQ-ACK feedback.

[0063] Figure 4B An example timeline for a CSI report that incorporates HARQ-ACK feedback is shown. Figure 4B This illustrates how CSI / CQI reports can be associated with or bundled with HARQ-ACK reports in combined PUCCH transmission 408. In other words, when the UE sends a HARQ-ACK to the base station in PUCCH 408, the UE can also include CSI / CQI feedback in PUCCH 408. The combined message or report with both HARQ-ACK feedback and CQI / CSI information allows the base station to adjust parameters used for transmission or retransmission at an early stage using CSI / CQI information, which in turn allows the base station to select more efficient MCS, code rate, and / or transmission power adaptations. CSI reports can be triggered by DL permission 402 (such as using the information field in the DCI field of DL permission 402) or implicitly triggered by NACK or time slots.

[0064] CSI reports triggered by DL (Dynamic Reliability Low Latency Communication) can help provide more reliable transmission / retransmission for Ultra Reliable Low Latency Communication (URLLC). URLLC is a new service category that caters to emerging services and applications with stringent latency and reliability requirements. URLLC-based services and applications may require sub-millisecond latency and less than 10 ms latency. 5 The error rate is 1 packet lost per packet. By triggering a CSI / CQI report via DL transmission and sending the HARQ-ACK along with the CSI / CQI report in the URLLC, the base station can improve retransmissions. This can help the UE receive communication accurately with a reduced number of retransmissions. For example, one retransmission might be sufficient to provide 10 -5 Reliability and low latency (e.g., 5ms). Utilizing a combination of Figure 4A The described HARQ-ACK report can send more retransmissions so that the UE can receive the communication accurately because the MCS, code rate and / or transmission power at the base station are adapted more slowly.

[0065] CSI reports triggered by downlink communication (DL) can include several types. The first type (“Type 1”) can be explicitly triggered in downlink communication from the base station, such as in conjunction with… Figure 4B Described. For example, a Type 1 CSI report may not be triggered by a Level 1 (L1) event (e.g., PDSCH decoding failure). Type 1 CSI reports can be used for more flexible CSI report triggering and transmission on the PUCCH. Type 1 CSI reports can be triggered by DL DCI, having similar aspects to the triggering of A-CSI reports triggered by UL DCI and reported on the corresponding PUSCH.

[0066] The second type (“Type 2”) can be triggered implicitly rather than by an explicit downlink message from the base station requesting CSI. For example, a Type 2 CSI report can be triggered by an L1 event, such as when there is a PDSCH decoding failure. In some aspects, a Type 2 CSI report may be referred to as a turbo-HARQ report. In some examples, this Type 2 CSI report can be used as a last resort for HARQ operations to complete a task. For example, if a previous transmission fails, the UE can send a NACK and some additional information about channel conditions and / or CSI / CQI feedback to the base station. The base station can use this additional information to allocate resources more accurately for retransmissions of the same packets. Because the base station has more accurate information and is able to improve retransmissions, the UE is more likely to receive retransmissions accurately and is more likely to meet the communication delay budget.

[0067] Tables 1 and 2 below show example aspects of the HARQ-ACK and CSI preparation timelines. Tables 1 and 2 also show examples of PDSCH processing times, such as N1.

[0068]

[0069] Table 1 - PDSCH Processing Time for PDSCH Processing Capacity 1

[0070]

[0071] Table 2 - PDSCH Processing Time for PDSCH Processing Capacity 2

[0072] The PDSCH decoding time N1 gives, for example, the minimum number of symbols used by the UE from the end of the PDSCH transmission to the start of the PUCCH resource carrying the corresponding HARQ-ACK. N1 is based on μ in Tables 1 and 2 for UE processing capabilities 1 and 2 respectively, where μ corresponds to (μ PDCCH ,μ PDSCH ,μ UL The maximum T is generated in ) pr one of oc,1, where μ PDCCH The subcarrier spacing corresponding to the PDCCH that schedules the PDSCH, μ PDSCH The subcarrier spacing corresponding to the scheduled PDSCH, and μ UL This corresponds to the subcarrier spacing of the uplink channel that will be used to transmit HARQ-ACK, etc. As shown in Tables 1 and 2, the values ​​in Capability 2 (i.e., Table 2) are smaller than those in Capability 1 (i.e., Table 1). Generally, this means that Capability 2 is faster, while Capability 1 is slower.

[0073] Tables 3 and 4 below show examples of HARQ-ACK and CSI preparation timelines.

[0074]

[0075] Table 3 - CSI Calculation Delay Requirements 1

[0076]

[0077] Table 4 - CSI Calculation Delay Requirements 2

[0078] Z corresponds to the time interval between the end of the PDCCH that triggers the CSI report and the start of the PUSCH carrying the CSI report, and Z' is the time interval between the end of the latest CSI-RS / IM for the measurement corresponding to the CSI report and the start of the PUSCH carrying the CSI report. μ in Tables 3 and 4 corresponds to min(μ PDCCH ,μ CSI -RS,μ UL ), where μ PDCCH This corresponds to the subcarrier spacing of the PDCCH that transmits DCI using it, and μUL The subcarrier spacing corresponding to the PUSCH from which CSI reports are to be transmitted, and μ CSI-RS This corresponds to the minimum subcarrier spacing of the aperiodic CSI-RS triggered by DCI.

[0079] Referring again to Tables 3 and 4, Z and Z' can be defined as follows:

[0080] and Where M is the number of updated CSI reports, (Z(m), Z'(m)) corresponds to the Mth requested CSI report and is defined as:

[0081] - In Table 3, (Z1, Z1') is used if the CSI is triggered without a PUSCH having a transport block or HARQ-ACK or both (when L = 0 CPUs are occupied), and the CSI to be sent is a single CSI and corresponds to a wideband frequency granularity, where the CSI corresponds to a maximum of 4 CSI-RS ports in a single resource without CRI reports, and where CodebookType is set to 'typeI-SinglePanel', or where reportQuantity is set to 'cri-RI-CQI', or

[0082] - In Table 4, (Z1, Z1') is used if the CSI to be sent corresponds to a wideband frequency granularity, where the CSI corresponds to a maximum of 4 CSI-RS ports in a single resource without a CRI report, and where CodebookType is set to 'typeI-SinglePanel', or where reportQuantity is set to 'cri-RI-CQI', or

[0083] - In Table 4, (Z3, Z3') if reportQuantity is set to "cri-RSRP" or "ssb-Index-RSRP", where Xμ depends on the UE's reporting capability beamReportTiming, and KB l Based on the UE's reported capabilities, beamSwitchTiming, or

[0084] - Otherwise, it is (Z2,Z2') in Table 4.

[0085] Figure 7 This is example CSI report timeline 700, which shows the relationship between the timelines for HARQ-ACK preparation (N1) and CSI reporting (Z, Z') as described above. Figure 7The time N1 between PDSCH 702 and the HARQ-ACK feedback 704 for PDSCH 702 is shown to be less than the amount of time (e.g., Z) between the transmission of CSI report 710 triggered by PDCCH 706 based on CSI-RS 708. It can be seen that the processing time for CSI report (as shown in Tables 3 and 4) may be longer than the corresponding processing time for PDSCH report (as shown in Tables 1 and 2).

[0086] There may be different types of DL-triggered CSI reports and HARQ-ACK feedback. In the first example (which may be referred to as "Case 1"), for a Type 1 DL-triggered CSI report triggered by an explicit indication from the base station, the UE can provide a HARQ-ACK feedback for the PDSCH and a CSI report triggered by its corresponding DL permission. In the second example ("Case 2"), for a Type 2 DL-triggered CSI report based on implicit triggering (such as decoding failure), reduced CSI calculations can be reported. For example, the UE can calculate the CSI based on the PDSCH signal-to-interference and noise ratio (SINR) or using DL DM-RS.

[0087] As mentioned above, Type 1DL-triggered CSI reports can be based on CSI-RS measurements and may include CSI interference measurements (CSI-IM). Therefore, Type 1DL-triggered CSI reports may require more time to generate compared to Type 2DL-triggered CSI reports, which may be based on PDSCH. In Type 2 CSI reports, the calculations / measurements at the UE can be based on signaling different from CSI-RS and / or CSI-IM. Alternatively, Type 2 CSI reports can be based on PDSCH SINR and / or DL ​​DM-RS. When the UE processes PDSCH SINR and / or DL ​​DM-RS without a CSI report, the UE has this information and can reuse the measurements and calculations to provide CSI information to the base station. Therefore, Type 2DL-triggered CSI reports may involve fewer additional calculations compared to Type 1DL-triggered CSI reports.

[0088] The minimum processing times for HARQ-ACK and CSI may be similar or different. In some aspects, a new timeline for reporting can be provided. The base station can indicate such a timeline and the resource allocation for reporting to the UE. For example, in some aspects, the UE can send HARQ-ACK feedback and CSI reports together, while in others, the UE can send HARQ-ACK feedback and CSI reports separately. The aspects given in this document provide resource allocations for different examples of reporting.

[0089] Figure 8 An example communication flow 800 between UE 802 and base station 804 is illustrated, which includes UE 802 receiving downlink communication from base station 804 that triggers a CSI report. The UE can determine whether to report the CQI along with HARQ feedback, and send the CSI and HARQ feedback based on this determination.

[0090] like Figure 8 As shown, base station 804 can select or determine the mode for CSI reporting for UE 802 at 801. The selection of the mode can be based on the available modes defined at base station 804, or on various factors such as the CSI calculation timeline, the HARQ feedback timeline, and / or whether the HARQ feedback can be delayed.

[0091] In some examples, UE 802 and base station 804 can use at least three different operating modes (i.e., CSI reporting modes). Base station 804 can select one of the reporting modes and indicate the selected mode to UE 802 for reporting CSI and HARQ-ACK.

[0092] In the first mode (“Mode 1”), CSI and HARQ-ACK can be reported together and can be reported without timeline changes (e.g., using a similar timeline to the HARQ-ACK feedback so that the HARQ-ACK feedback is not delayed). For example, HARQ-ACK feedback and CSI information can be sent together on the same channel.

[0093] In the second mode (“Mode 2”), CSI and HARQ-ACK feedback can be reported together, with the reporting time delayed compared to the time when HARQ-ACK can be sent. For example, HARQ-ACK feedback and CSI information can be sent together on the same channel. Mode 2 reporting can be applied when CSI calculation involves a longer time than HARQ-ACK determination. HARQ-ACK is delayed so that it can be sent together with CSI when it is determined. Therefore, in both Mode 1 and Mode 2, the UE can jointly send both CSI and HARQ-ACK feedback on the same channel, but different timings are used for the two modes.

[0094] In the third mode (“Mode 3”), CSI and HARQ-ACK feedback can be reported separately, such as at different times and / or on different PUCCH resources. Mode 3 can be used when base station 804 does not want HARQ-ACK reporting to be delayed. In each of the modes presented above, CSI and HARQ-ACK can be triggered by a single DL DCI.

[0095] When the CSI calculation timeline is similar to or the same as the HARQ-ACK timeline, Mode 1 CSI reporting (where CSI and HARQ-ACK are reported together using the HARQ-ACK timeline) can be enabled (i.e., indicated to the UE). For example, Mode 1 CSI reporting can be used when the CSI calculation timeline is the same as the HARQ-ACK timeline, within a threshold time range such as the HARQ-ACK timeline, or does not exceed the HARQ-ACK timeline. For Type 2DL triggered CSI reporting, this might be the case where the CSI is based on PDSCH or DL ​​DM-RS instead of CSI-RS, and involves a lighter computational burden for the UE. Similarly, Type 2DL triggered CSI reporting can be implicitly triggered (e.g., a simplified CSI report can be triggered based on decoding failure). Since the timeline used for CSI reporting is similar to or the same as that used for HARQ-ACK reporting, the timeline of HARQ-ACK reporting can be used to send combined information. For example, when a CSI report is triggered due to a PDSCH decoding failure, the UE can report a CQI or some indication of the amount of resources available for subsequent transmissions so that the PDSCH is more likely to be successfully decoded in the next transmission of the same TB. For Mode 1 reporting, the CSI calculation timeline can be based on N1 as shown in Tables 1 and 2. Mode 1 reporting can also be enabled for reports triggered by Type 1DL from downlink signals from the base station when the CSI calculation load is less than the CSI calculation load shown in Tables 3 and 4. As an example, Mode 1 reporting can be used for broadband CSI reporting with one or two CSI-RS ports in a single resource. In such examples, the load on CSI measurements can be reduced based on the conditions from the base station, allowing CSI calculations to be completed simultaneously with HARQ-ACK reporting.

[0096] When CSI reports and HARQ-ACK feedback are sent together, Mode 2 reporting can be enabled (i.e., indicated to the UE), but the time used for CSI calculation is longer than the time used only for HARQ-ACK reporting. For example, Mode 2 reporting can be applied when the CSI calculation delay (Z, Z') selected from, for example, Table 3 and / or Table 4 is greater than the time used for HARQ-ACK feedback (e.g., N1). In Mode 2 reporting, a separate (or new) timeline can be used to combine CSI and HARQ-ACK reports.

[0097] In scenarios where delays in HARQ-ACK reporting are to be avoided, or if the base station will use CSI reports for other transmissions that are not necessarily retransmissions of the same TB, Mode 3 reporting can be enabled (i.e., indicated to the UE). In such cases, the timelines used for HARQ-ACK and CSI reporting may be the same as those shown in Tables 1 through 4, and may follow two separate timelines. For example, CSI reporting may be based on one timeline, and HARQ-ACK reporting may be based on a different timeline.

[0098] Refer again Figure 8 After base station 804 selects or determines the CSI reporting mode at 801, base station 804 may send an indication 803 of the selected CSI reporting mode to UE 802 in downlink communication (e.g., DL permission or other downlink signaling). This indication may be an explicit indication or an implicit indication of the selected reporting mode.

[0099] In one aspect, the indication 803 of the reporting mode can be explicitly given to UE 802 in the DL signal from the base station. For example, base station 804 can send an indication to UE 802 in an RRC message indicating whether to report CSI for DL-triggered HARQ-ACK based on mode 1, 2, or 3 (e.g., whether to report CSI together with HARQ-ACK information) and / or indicating the timing for transmission. The base station can indicate the mode to follow based on the type of DL-triggered CSI report (e.g., mode 1 or 2). For example, for a type 2 DL-triggered CSI report, base station 804 can instruct UE 802 to use a first mode (such as mode 1), and for a type 1 DL-triggered CSI report, base station 804 can instruct UE 802 to follow a different mode (such as mode 2 or 3). The reporting mode can also be explicitly indicated to UE 802 in the DCI. In some examples, the indication of the mode can be associated with RRC signaling for the CSI procedure ID. In some examples, the indication of the mode may be based on the MCS table used for scheduling PDSCH. In some examples, the indication of the mode may be based on whether the CSI report is triggered by permission to schedule the initial transmission or permission to schedule retransmission. In some examples, the indication of the mode may be based on the number of layers used for PDSCH transmission. In some examples, the indication of the mode may be based on the number of TBSs used for PDSCH transmission. In some examples, the indication of the mode may be based on the number of RBs used for PDSCH transmission. In some examples, the indication of the mode may be based on whether a subband CSI report or a wideband CSI report is configured to trigger the CSI report configuration. The reporting mode may be based on one or more of these example parameters.

[0100] In another approach, the type of report can be indicated to UE 802 based on the timing used for CSI and / or HARQ-ACK feedback. For example, the reporting mode can be indicated to the UE based on a time gap (e.g., the time gap between the DL DCI that triggers the CSI report and the PUCCH resource carrying the CSI report), or the reporting mode can be determined by the UE. For example, if type 2 DL-triggered CSI reporting is enabled instead of type 1 DL-triggered CSI reporting during the gap between the PDCCH and PUCCH, UE 802 can follow type 2 reporting. Alternatively, if the gap is only sufficient for HARQ-ACK reporting (e.g., less than a threshold), the UE can report CSI alone or not. In other words, the timing can provide UE 802 with an implicit indication of whether to perform type 2 reporting, for example, when sufficient time is provided for type 2 reporting. Sufficient time can be equal to or greater than a threshold. However, if the time interval for instructing UE 802 to perform a Type 2 report is insufficient (e.g., less than a threshold), UE 802 may report a HARQ-ACK without CSI. Alternatively, if the interval is greater than a threshold, the timing may instruct UE 802 to provide a more robust CSI update. As an example, DL allows triggering a CSI report for a given CSI reporting configuration. If the time interval to the PUCCH resource is less than a threshold, base station 804 may implicitly instruct UE 802 to report a simplified CSI report or to report HARQ-ACK and CSI separately (e.g., at different times).

[0101] Refer again Figure 8 After UE 802 receives indication 803 of the selected mode from base station 804, UE 802 determines whether to report CSI together with HARQ feedback, as shown at 807. Based on the determination at 807, UE 802 may send CSI and HARQ feedback together in combined transmission 809 without changing the timeline (e.g., based on mode 1), send CSI and HARQ feedback together in combined transmission 811 with a timeline delay for HARQ-ACK feedback (e.g., mode 2), or send CSI and HARQ feedback separately in HARQ-ACK transmission 813 and CSI transmission 815 (e.g., mode 3).

[0102] The base station can indicate and / or the UE can determine the PUCCH resources used for reporting HARQ-ACK feedback and CSI in any of a variety of ways.

[0103] In the first aspect, base station 804 may indicate a single PUCCH resource indicator (PRI) and K1 (i.e., the time gap between the end of PDSCH and the start of PUCCH) to UE 802 at 805. If a single PRI and K1 field is present in the DL DCI from base station 804, UE 802 may determine to send a type 2 DL-triggered CSI report. The UE may determine to provide a type 2 DL-triggered CSI report using either mode 1 or mode 2 CSI reporting. Alternatively or additionally, the CSI trigger field in the DCI may trigger a type 2 DL-triggered CSI. In such an example, UE 802 may send CSI and HARQ-ACK on the same resource indicated by PRI and K1. This can be applied to both mode 1 and mode 2 reports, where HARQ-ACK and CSI are configured to be reported together, for example, for transmissions 809 or 811.

[0104] In the second aspect, base station 804 may indicate a single PRI and K1 at 805. For example, a single PRI and K1 field may exist in the DL DCI, but the CSI triggering event may be based on L1. For example, UE 802 may be triggered to report CSI based on PDSCH decoding failure. In this example, UE 802 may determine not to send CSI or may send more involved CSI reports. If no CSI is sent, UE 802 may use the PRI and K1 indicated in the DCI to report HARQ-ACK. If UE 802 determines to report CSI, the UE may apply a predetermined offset to K1 or PRI or both to determine the resources used to send CSI and HARQ-ACK. UE 802 then sends CSI and HARQ-ACK on the inferred PUCCH resources, for example, at 811.

[0105] In the third aspect, base station 804 may indicate multiple PRI and / or K1 values ​​to UE 802 in the DCI at 805. For example, base station 804 may indicate two PRI values ​​and / or two K1 values ​​to UE 802. If UE 802 receives multiple PRI and / or K1 fields, the UE may use one PRI and / or K1 to send a CSI report and another PRI and / or K1 to send a HARQ-ACK. If different PRI and / or K1 values ​​indicate the same PUCCH resource, the CSI and HARQ-ACK feedback may be sent together on the PUCCH resource (e.g., at 809 or 811). If different PRI and / or K1 values ​​indicate different PUCCH resources, the CSI and HARQ-ACK feedback may be sent separately (e.g., at 813 and 815).

[0106] In the fourth aspect, base station 804 may (e.g., at 803) indicate in the DCI whether HARQ-ACK and CSI can be sent together or separately. For example, if base station 804 indicates two K1 and / or PRI values ​​to the UE at 805, and instructs the UE to send HARQ-ACK and CSI separately at 803, then the UE can use the two PRI and / or K1 values ​​to (e.g., at 813 and 815) send HARQ-ACK or CSI separately. If base station 804 indicates two K1 and / or PRI values ​​to the UE 802 at 805, and instructs the UE 802 to send HARQ-ACK and CSI together at 803, then the UE 802 can use one of the indicated K1 and PRI values ​​to (e.g., at 809 or 811) send HARQ-ACK and CSI together.

[0107] In another scenario, base station 804 can provide UE 802 with an indication of whether to send HARQ-ACK and CSI separately or jointly (e.g., via bits in the DCI), and based on this indication (e.g., a bit in the DCI), the UE can use K1 and PRI provided by the base station at 805 to send a combined transmission. If base station 804 indicates a set of K1 and / or PRI to UE 802 in the DCI and instructs the UE to send HARQ-ACK and CSI together, then UE 802 can use the resources indicated by PRI and K1 to send a combined transmission of CSI and HARQ-ACK feedback, for example, at 809 or 811. If base station 804 indicates a set of K1 and / or PRI to UE 802, and instructs the UE to send HARQ-ACK and CSI separately, then UE 802 can use the resources indicated by K1 and / or PRI to determine the transmission of a message (e.g., a HARQ-ACK feedback such as at 813), and can determine a second resource for other transmissions (e.g., a CSI at 815) in part based on PRI and K1. For example, UE 802 can apply an offset to PRI and / or K1 to determine the resources used for transmitting other transmissions.

[0108] In the fifth aspect, the base station can implicitly indicate whether HARQ-ACK and CSI can be transmitted together or separately. For example, base station 804 can indicate a first set of K1 and / or PRI fields to the UE in the DCI at 805. Additional K1 and / or PRI fields can be associated with the first K1 and PRI. For example, each code point can be associated with an additional K1 / PRI. UE 802 can use the first set of K1 and PRI fields to determine the associated additional K1 / PRI fields. If the first PRI and K1 fields indicated in the DCI are the same as the associated additional PRI / K1 fields, then UE 802 can (e.g., at 809 or 811) transmit HARQ-ACK and CSI together. If the first PRI and K1 are different from the associated additional PRI / K1, then UE 802 may use the first PRI and K1 for one transmission (e.g., HARQ-ACK 813) and use the additional PRI / K1 for another transmission (e.g., CSI 815) to send the CSI and HARQ-ACK feedback separately (e.g., at 813 and 815).

[0109] Various aspects can be applied together. As an example, the second and fourth aspects can be applied together.

[0110] Figure 9 This is a flowchart of a wireless communication method 900. This method can be performed by a UE or a component of a UE (e.g., UE 104, 350, 802; device 1002, 1002'; processing system 1114, which may include memory 360 and may be the entire UE 350 or components of UE 350, such as TX processor 368, RX processor 356, and / or controller / processor 359). Optional aspects are shown in dashed lines. This method enables the UE to provide a CSI report to the base station in conjunction with HARQ-ACK feedback.

[0111] At 908, the UE receives downlink communication that triggers a CSI report. This reception can be, for example, by... Figure 10 The receiving component 1004 of the apparatus 1002 performs the function. Downlink communication can explicitly or implicitly trigger a CSI report. Downlink communication may include explicit signaling from the base station requesting a CSI report, such as that described in conjunction with a CSI report triggered by type 1DL. Downlink communication may include a PDSCH; for example, a CSI report may be triggered by a UE based on a decoding failure of the PDSCH.

[0112] At point 910, the UE determines whether to report CSI along with HARQ feedback. This determination can be based on a combination of... Figure 8 It is made by any combination of the aspects described. For example, Figure 8An example determination at 807 is shown. This determination can be, for example, by... Figure 10 The determining component 1008 of the device 1002 in the middle is executed.

[0113] After the UE determines whether to report the CSI along with the HARQ feedback, at 916, the UE sends the CSI and HARQ feedback based on its determination of whether to report the CSI along with the HARQ feedback. The transmission can be, for example, by... Figure 10 The transmitting component 1006 of the device 1002 in the middle is executed.

[0114] If the UE determines to report CSI and HARQ feedback together, then at 912, the UE will report CSI and HARQ feedback together, for example, as shown in 809 or 811. The UE can use the timing for HARQ feedback to report CSI and HARQ feedback. For example, the UE can determine the timing for HARQ feedback to report CSI and HARQ feedback together based on the relationship between the CSI calculation time and the timing for HARQ feedback. The UE can also determine the timing for HARQ feedback to report CSI and HARQ feedback together based on whether the CSI report is a simplified CSI report, where the simplified CSI report can be determined based on one or more of PDSCH or DM-RS. A simplified CSI report can include a wideband CSI report with no more than two CSI-RS ports in a single resource. When the timing for CSI feedback is greater than that for HARQ feedback, the UE can use the timing for CSI feedback to report CSI and HARQ feedback. In other words, HARQ reporting can be delayed so that CSI and HARQ can be reported together based on the timing of CSI feedback.

[0115] If the UE determines to report CSI and HARQ feedback separately, then at 914, the UE can use different control channel resources and / or time resources to report CSI than for HARQ feedback. Figure 8 An example of HARQ feedback 813 sent separately from CSI 815 is shown.

[0116] At position 902, the reporting mode can be explicitly indicated to the UE, such as in a DL permission from the base station or other downlink signaling. For example, the UE can receive an indication of the reporting mode from the base station (e.g., such as...). Figure 8 Instruction 803), where the UE determines whether to report CSI along with HARQ feedback based on the instruction for the reporting mode. Reception of the instruction can, for example, be provided by... Figure 10The receiving component 1004 and / or reporting mode component 1010 of the device 1002 perform the instruction. The instruction can be received in RRC signaling or DCI. The instruction can also be based on at least one of the following: the type of downlink-triggered CSI report, the CSI procedure identifier (ID), the modulation and coding scheme used for scheduling the Physical Downlink Shared Channel (PDSCH), a CSI triggered by a first permission for scheduling initial transmission, a CSI triggered by a second permission for scheduling retransmission, a first number of layers for PDSCH transmission, a second number of transport blocks for PDSCH transmission, a third number of resource blocks for PDSCH transmission, a subband CSI report configured for the UE, or a wideband CSI report configured for the UE.

[0117] The reporting mode can be implicitly indicated to the UE, for example, by combining... Figure 8 The UE can determine whether to report the CSI along with the HARQ feedback based on the amount of time between the downlink communication that triggers the CSI report and the uplink control channel resources used for transmitting the CSI report. For example, when the amount of time is less than a first threshold, the UE can report a simplified CSI report along with the HARQ feedback, or, where the amount of time is less than a second threshold, the UE uses different control channel resources than the HARQ feedback to report the CSI. When the amount of time is greater than the first threshold, the UE can also report a configured CSI report along with the HARQ feedback.

[0118] There are several methods for determining the PUCCH resources used to report HARQ feedback and CSI feedback together. In one aspect, the UE may receive a PRI and a time gap (e.g., K1) between the PDSCH and HARQ feedback, whereby the UE uses the resources indicated by the PRI and the time gap to send the CSI together with the HARQ feedback.

[0119] In another scenario, the UE may, for example, receive the PRI and the time gap between PDSCH transmission and HARQ feedback in the DCI at 904, wherein the CSI report is triggered by unsuccessful decoding of the PDSCH transmission, and wherein the UE uses the resources indicated by the PRI and the time gap to send the HARQ feedback. The PRI and the time gap may, for example, be determined by... Figure 10 The receiving component 1004 and / or PRI / K1 component 1012 of the device 1002 receive the data. The UE can send a CSI report using an offset applied to one or more resources indicated by the PRI and the time slot.

[0120] In another aspect, the UE may receive at least one of an additional PRI or an additional time slot in the DCI, wherein the UE uses additional resources indicated by at least one of the additional PRI or the additional time slot to send a CSI report.

[0121] In another scenario, the UE may receive an indication of a reporting mode from the base station at 902, whereby the UE may determine whether to report CSI together with HARQ feedback based on the indication of the reporting mode, and then the UE may receive at least one PRI and at least one time slot in the DCI at 904, whereby the UE may transmit CSI and HARQ feedback based on the indication of the reporting mode, at least one PRI, and at least one time slot. For example, the indication at 902 may indicate that CSI is transmitted together with HARQ feedback, and at 904 the DCI indicates one PRI and one time slot, and the UE uses one PRI and one time slot to transmit CSI and HARQ feedback. Alternatively, the indication at 902 may indicate that CSI and HARQ feedback are transmitted separately, and at 904 the DCI may indicate one PRI and one time slot, and the UE may use one PRI and one time slot to transmit HARQ feedback, and may use an offset applied to at least one of the PRI and one time slot to transmit CSI.

[0122] Multiple PRIs and time slots can also be used to implicitly trigger CSI reports. For example, at 906, the indication can instruct CSI and HARQ feedback to be sent separately, and the DCI can instruct at least one of a first PRI and a first time slot, and a second PRI or a second time slot, wherein the UE uses the first PRI and the first time slot to send HARQ feedback, and uses at least one of the second PRI or a second time slot to send CSI reports. Additional PRIs and / or time slots can, for example, be provided by... Figure 10 The receiving component and / or PRI / K1 component 1012 of the device 1002 in the middle receive. The indication may indicate that the CSI is sent together with the HARQ feedback, and the DCI may indicate multiple PRIs or multiple time slots, wherein the UE uses one of the multiple PRIs or one of the multiple time slots to send the CSI and HARQ feedback.

[0123] In another scenario, the UE can receive a first PRI and a first time slot in the DCI, where the DCI code points are associated with a second PRI and a second time slot. If the first PRI matches the second PRI and the first time slot matches the second time slot, the UE can send a CSI report along with HARQ feedback. If the first PRI differs from the second PRI, or if the first time slot differs from the second time slot, the UE can use the first PRI and the first time slot to send HARQ feedback, and use the second PRI and the second time slot to send the CSI report.

[0124] Figure 10 This is a conceptual data flow diagram 1000 illustrating the data flow between different units / components in example device 1002. The device may be a UE or a component of a UE. The device includes a receiving component 1004 configured to receive downlink communication from base station 1050 that triggers a CSI report, for example, as in conjunction with... Figure 9 As described in 908. The device includes a determining component 1008, which is configured to determine whether to report CSI together with HARQ feedback, for example, as in combination. Figure 9 As described in 910. The apparatus includes a transmitting component 1006, which is configured to transmit CSI and HARQ feedback based on a determination of whether to report CSI together with HARQ feedback, for example, as in combination. Figure 9 As described in 916. The device includes a reporting mode component 1010, which is configured to receive an indication of a reporting mode from a base station, for example, as in conjunction with Figure 9 As described in 902, the UE determines whether to report the CSI along with the HARQ feedback based on an indication of the reporting mode. The device includes a PRI / K1 component 1012, which is configured to receive at least one PRI and at least one time interval, for example, as combined with... Figure 9 As described in 904 and / or 906, the UE uses PRI and time slots to send CSI together with HARQ feedback.

[0125] The device may include the ability to perform the above-described actions. Figure 9 Each box in the flowchart of the algorithm and by Figure 8 Additional components that perform various aspects of UE802. Therefore, the above-mentioned components can be used to perform these functions. Figure 9 Each box in the flowchart and by Figure 8The UE 802 in the device performs various aspects, and the device may include one or more of those components. A component 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 implementation by a processor, or some combination thereof.

[0126] Figure 11 Figure 1100 illustrates an example of a hardware implementation of a device 1002' employing processing system 1114. Processing system 1114 can be implemented using a bus architecture (typically represented by bus 1124). Bus 1124 can include any number of interconnect buses and bridges, depending on the specific application and overall design constraints of processing system 1114. Bus 1124 links together various circuits including one or more processors and / or hardware components (represented by processor 1104, components 1004, 1006, 1008, 1010, 1012, and computer-readable medium / memory 1106). Bus 1124 can also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further.

[0127] Processing system 1114 may be coupled to transceiver 1110. Transceiver 1110 is coupled to one or more antennas 1120. Transceiver 1110 provides a unit for communicating with various other devices over a transmission medium. Transceiver 1110 receives signals from one or more antennas 1120, extracts information from the received signals, and provides the extracted information to processing system 1114 (specifically, receiving component 1004). Additionally, transceiver 1110 receives information from processing system 1114 (specifically, transmitting component 1006) and generates signals to be applied to one or more antennas 1120 based on the received information. Processing system 1114 includes processor 1104 coupled to computer-readable medium / memory 1106. Processor 1104 is responsible for general processing, including the execution of software stored on computer-readable medium / memory 1106. When executed by processor 1104, the software causes processing system 1114 to perform the various functions described above for any particular device. The computer-readable medium / memory 1106 can also be used to store data manipulated by the processor 1104 when executing software. The processing system 1114 also includes at least one of components 1004, 1006, 1008, 1010, and 1012. A component can be a software component running in the processor 1104 and located / stored in the computer-readable medium / memory 1106, one or more hardware components coupled to the processor 1104, or some combination thereof. The processing system 1114 can be a component of the UE 350 and can include memory 360 and / or at least one of the following: TX processor 368, RX processor 356, and controller / processor 359. Alternatively, the processing system 1114 can be the entire UE (e.g., see...). Figure 3 (of 350).

[0128] In one configuration, the apparatus 1002 / 1002' for wireless communication includes: a unit for receiving downlink communication that triggers a CSI report; a unit for determining whether to report the CSI together with HARQ feedback; and a unit for transmitting the CSI and HARQ feedback based on the determination of whether to report the CSI together with HARQ feedback. The apparatus may further include: a unit for receiving an indication of a reporting mode from a base station, wherein the UE determines whether to report the CSI together with HARQ feedback based on the indication of the reporting mode. The apparatus may further include: a unit for receiving a PRI and a time gap between physical downlink shared channel transmission and HARQ feedback, wherein the UE uses resources indicated by the PRI and the time gap to transmit the CSI together with HARQ feedback. The apparatus may further include: a unit for receiving a PRI in the DCI and a time gap between PDSCH transmission in the downlink and HARQ feedback, wherein the CSI report is triggered by unsuccessful decoding of the PDSCH transmission, and wherein the UE uses resources indicated by the PRI and the time gap to transmit HARQ feedback. The apparatus may further include: a unit for receiving at least one of an additional PRI or an additional time slot in the DCI, wherein the UE uses additional resources indicated by at least one of the additional PRI or the additional time slot to send a CSI report. The apparatus may further include: a unit for receiving an indication of a reporting mode from a base station, wherein the UE determines whether to report the CSI together with HARQ feedback based on the indication of the reporting mode; and a unit for receiving at least one PRI and at least one time slot in the DCI, wherein the UE sends the CSI and HARQ feedback based on the indication of the reporting mode, at least one PRI, and at least one time slot. The apparatus may further include: a unit for receiving a first PRI and a first time slot in the DCI, wherein the code point of the DCI is associated with a second PRI and a second time slot, and wherein if the first PRI matches the second PRI and the first time slot matches the second time slot, the UE sends the CSI report together with HARQ feedback. The aforementioned units may be one or more components of the aforementioned components of apparatus 1002 / 1002' and / or the processing system 1114 of apparatus 1002' may be configured to perform the functions described by the aforementioned units. The processing system 1114 may include a TX processor 368, an RX processor 356, and a controller / processor 359. Therefore, in one configuration, the aforementioned units may be the TX processor 368, the RX processor 356, and the controller / processor 359 configured to perform the functions described therein.

[0129] Figure 12This is a flowchart of a wireless communication method 1200. The method can be executed by a base station or components of a base station (e.g., base stations 102, 180, 310, 804; devices 1302, 1302; processing system 1414, which may include memory 376 and may be the entire base station 310 or components of base station 310, such as TX processor 316, RX processor 370, and / or controller / processor 375). Optional aspects are shown in dashed lines. This method enables the base station to receive a CSI report from the UE incorporating HARQ-ACK feedback.

[0130] At 1210, the base station sends downlink communication that triggers a CSI report. The downlink communication can trigger a CSI report explicitly or implicitly. The downlink communication may include explicit signaling from the base station requesting a CSI report, such as that described in conjunction with a CSI report triggered by type 1DL. The downlink communication may include a PDSCH; for example, a CSI report may be triggered by a decoding failure of the PDSCH. The downlink communication may be, for example, by… Figure 14 The transmitting component 1406 of the device 1402 in the middle is used to transmit.

[0131] At point 1212, the base station instructs the UE whether to report CSI together with HARQ feedback based on the selection or determination of the base station's CSI reporting pattern at point 1002. Figure 8 Example aspects of instruction 803 are described. This instruction can, for example, be provided by... Figure 14 The report mode component 1410 of the device 1402 is used to perform this.

[0132] At point 1202, the base station can determine the mode used for CSI reporting. This determination can, for example, be made by... Figure 14 The determining component 1408 of the device 1402 in the middle is used to perform the determination. The determination of the mode can be determined, for example, as in combination with... Figure 8 Described. Figure 13 A diagram illustrating an example of determining the CSI reporting mode is shown. This determination can be based on various factors, such as the CSI calculation timeline, the HARQ feedback timeline, and / or whether delaying HARQ feedback is permissible, for example, in combination with... Figure 8Described as follows. For example, if the CSI calculation time is equal to or less than the HARQ feedback time as determined at 1302, the base station can determine to report the CSI reported along with the HARQ feedback without any change to the timeline (e.g., based on the HARQ feedback timeline), and can indicate the timeline to the UE at 1304. If the CSI calculation time is greater than the HARQ feedback time, the base station can determine at 1306 whether to delay the HARQ feedback, and indicate the CSI reported along with the HARQ feedback at 1308 based on the new designated timeline (e.g., based on the CSI timeline). To avoid delaying the HARQ feedback, the base station can instruct the UE at 1310 to report the CSI and HARQ feedback separately.

[0133] After the base station indicates whether to report CSI along with HARQ feedback, at 1214, the base station receives CSI and HARQ feedback based on this indication, for example, by combining... Figure 8 The information is described in 809, 811, 813, and / or 815. This reception can be, for example, provided by... Figure 14 The receiving component 1404 of the apparatus 1402 performs this function. If the base station instructs that CSI and HARQ feedback be reported together, then at 1214, the base station can receive the CSI and HARQ feedback together. The base station can use timing for HARQ feedback to receive the CSI and HARQ feedback. For example, the base station can use timing for HARQ feedback to receive the CSI and HARQ feedback together based on the relationship between the CSI calculation time and the timing for HARQ feedback. The base station can use timing for HARQ feedback to receive the CSI and HARQ feedback together based on the fact that the CSI report is a simplified CSI report, wherein the simplified CSI report can be determined based on one or more of PDSCH or DM-RS. The simplified CSI report can include a broadband CSI report having no more than two CSI-RS ports in a single resource.

[0134] When the timing used for CSI feedback is greater than that used for HARQ feedback, the base station can use the timing used for CSI feedback to receive both CSI and HARQ feedback. In other words, HARQ reporting can be delayed so that CSI and HARQ can be reported together based on the timing of CSI feedback. If the base station receives CSI and HARQ feedback separately, then at 1214, the base station can receive CSI from a different control channel resource than HARQ feedback.

[0135] At 1204, the base station can explicitly indicate the reporting mode, such as via DL permission. For example, the base station can send an indication of the reporting mode to the UE, whereby the UE determines whether to report CSI along with HARQ feedback based on the indication of the reporting mode. This indication can be sent in RRC signaling or DCI. The indication can also be based on at least one of the following: the type of downlink-triggered CSI report, the CSI procedure identifier (ID), the modulation and coding scheme used for scheduling PDSCH, the CSI triggered by a first permission for scheduled initial transmission, the CSI triggered by a second permission for scheduled retransmission, a first number of layers for PDSCH transmission, a second number of transport blocks for PDSCH transmission, a third number of resource blocks for PDSCH transmission, subband CSI reporting configured for the UE, or wideband CSI reporting configured for the UE.

[0136] The base station can implicitly indicate the reporting mode. The base station can determine whether to report the CSI along with the HARQ feedback based on the amount of time between the downlink communication that triggers the CSI report and the uplink control channel resources used for the transmission of the CSI report. For example, when the time is less than a first threshold, the base station can receive a simplified CSI report along with the HARQ feedback, or where, when the time is less than a second threshold, the base station receives the CSI from a different control channel resource than the HARQ feedback. When the time is greater than the first threshold, the base station can also receive a configured CSI report along with the HARQ feedback.

[0137] There are several methods to indicate the PUCCH resources used for reporting HARQ feedback and CSI feedback together. In one aspect, the base station may transmit an indication at 1206 regarding the PRI and the time gap (e.g., K1) between the PDSCH and HARQ feedback, wherein the base station uses the resources indicated by the PRI and the time gap to receive CSI together with the HARQ feedback. The transmission may be performed, for example, by the transmission component 1406 and / or the PRI / K1 component 1412 of the apparatus 1402 in FIG. 14.

[0138] In another approach, the base station can transmit the PRI in the DCI and the time gap between the PDSCH transmission and HARQ feedback in the downlink, wherein the CSI report is triggered by unsuccessful decoding of the PDSCH transmission, and wherein the base station uses the resources indicated by the PRI and the time gap to receive the HARQ feedback. The base station can use an offset applied to one or more of the resources indicated by the PRI and the time gap to receive the CSI report.

[0139] In another aspect, the base station may send at least one of an additional PRI or an additional time slot in the DCI, wherein the base station uses additional resources indicated by at least one of the additional PRI or the additional time slot to receive CSI reports.

[0140] In another embodiment, the base station may send an indication of a reporting mode to the UE, wherein the UE may determine whether to report CSI together with HARQ feedback based on the indication of the reporting mode, and then the base station sends at least one PRI and at least one time slot in the DCI, wherein the base station may receive CSI and HARQ feedback based on the indication of the reporting mode, at least one PRI, and at least one time slot. The indication may also indicate that CSI and HARQ feedback are received together, and the DCI indicates one PRI and one time slot, wherein the base station uses one PRI and one time slot to receive CSI and HARQ feedback. Alternatively, the indication may indicate that CSI and HARQ feedback are received separately, and the DCI may indicate one PRI and one time slot, wherein the base station may use one PRI and one time slot to receive HARQ feedback, and may use an offset applied to at least one of the PRI and one time slot to receive CSI.

[0141] Multiple PRIs and time slots can also be used to implicitly trigger CSI reports. For example, at 1208, the indication can indicate that CSI and HARQ feedback are received separately, and the DCI can indicate at least one of a first PRI and a first time slot, and a second PRI or a second time slot, wherein the base station uses the first PRI and the first time slot to receive HARQ feedback, and uses at least one of the second PRI or the second time slot to send a CSI report. The indication can also indicate that CSI and HARQ feedback are received together, and the DCI can indicate multiple PRIs or multiple time slots, wherein the base station can use one of the multiple PRIs or one of the multiple time slots to receive CSI and HARQ feedback.

[0142] In another scenario, the base station can transmit a first PRI and a first time slot in the DCI, wherein the code point of the DCI is associated with a second PRI and a second time slot. If the first PRI matches the second PRI and the first time slot matches the second time slot, the base station can receive the CSI report along with the HARQ feedback. If the first PRI differs from the second PRI or if the first time slot differs from the second time slot, the base station can use the first PRI and the first time slot to receive the HARQ feedback and use the second PRI and the second time slot to receive the CSI report.

[0143] Figure 14This is a conceptual data flow diagram 1400 illustrating the data flow between different units / components in example device 1402. The device may be a base station or a component of a base station. The device includes a transmitting component 1406 configured to transmit downlink communication that triggers a CSI report, for example, as in conjunction with... Figure 12 As described in 1210. The apparatus includes a reporting mode component 1410, which is configured to instruct the UE 1450 whether to report the CSI together with the HARQ feedback, for example, as in combination with Figure 12 As described in 1212. The device includes a receiving component 1404 configured to receive CSI and HARQ feedback based on the indication, for example, as in combination Figure 12 As described in section 1214. The device includes a PRI / K1 component 1412, which is configured to send at least one PRI and at least one time interval to the UE, for example, as in combination with Figure 12 As described in 1206 and / or 1208. The device may include a selection component 1408 configured to select a reporting mode for the UE, for example, as in combination with 1202 and / or Figure 13 Described.

[0144] The device may include the ability to perform the above-described actions. Figure 12 Each box in the flowchart of the algorithm and by Figure 8 The base station 804 in the middle performs various additional components. Therefore, the above-mentioned components can perform the above-mentioned functions. Figure 12 Each box in the flowchart and by Figure 8 The base station 804 in the device performs various aspects, and the device may include one or more of those components. A component 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 implementation by a processor, or some combination thereof.

[0145] Figure 15Figure 1500 illustrates an example of a hardware implementation of a device 1402' employing processing system 1514. Processing system 1514 can be implemented using a bus architecture (typically represented by bus 1524). Bus 1524 can include any number of interconnect buses and bridges, depending on the specific application and overall design constraints of processing system 1514. Bus 1524 links together various circuits including one or more processors and / or hardware components (represented by processor 1504, components 1404, 1406, 1408, 1410, 1412, and computer-readable medium / memory 1506). Bus 1524 can also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further.

[0146] Processing system 1514 may be coupled to transceiver 1510. Transceiver 1510 is coupled to one or more antennas 1520. Transceiver 1510 provides a unit for communicating with various other devices over a transmission medium. Transceiver 1510 receives signals from one or more antennas 1520, extracts information from the received signals, and provides the extracted information to processing system 1514 (specifically, receiving component 1404). Additionally, transceiver 1510 receives information from processing system 1514 (specifically, transmitting component 1406) and generates signals to be applied to one or more antennas 1520 based on the received information. Processing system 1514 includes processor 1504 coupled to computer-readable medium / memory 1506. Processor 1504 is responsible for general processing, including the execution of software stored on computer-readable medium / memory 1506. When executed by processor 1504, the software causes processing system 1514 to perform the various functions described above for any particular device. The computer-readable medium / memory 1506 can also be used to store data manipulated by the processor 1504 when executing software. The processing system 1514 also includes at least one of components 1404, 1406, 1408, 1410, and 1412. A component can be a software component running in the processor 1504 and located / stored in the computer-readable medium / memory 1506, one or more hardware components coupled to the processor 1504, or some combination thereof. The processing system 1514 can be a component of the base station 310 and can include memory 376 and / or at least one of the following: TX processor 316, RX processor 370, and controller / processor 375. Alternatively, the processing system 1514 can be the entire base station (e.g., see...). Figure 3 (310).

[0147] In one configuration, the apparatus 1402 / 1402' for wireless communication at a base station may include: a unit for transmitting downlink communication that triggers a CSI report; a unit for instructing the UE whether to report the CSI together with HARQ feedback; and a unit for receiving the CSI and HARQ feedback based on the instruction. The apparatus may further include: a unit for transmitting a PRI and a time gap between physical downlink shared channel transmission and HARQ feedback, wherein the base station uses resources indicated by the PRI and the time gap to receive the CSI together with HARQ feedback. The apparatus may further include: a unit for transmitting a PRI in the DCI and a time gap between PDSCH transmission in the downlink and HARQ feedback, wherein the CSI report is triggered by unsuccessful decoding of the PDSCH transmission, and wherein the base station uses resources indicated by the PRI and the time gap to receive the HARQ feedback. The apparatus may further include: a unit for transmitting at least one of an additional PRI or an additional time gap in the DCI, wherein the base station uses additional resources indicated by at least one of the additional PRI or the additional time gap to receive the CSI report. The apparatus may further include: a unit for transmitting at least one PRI and at least one time slot in the DCI, wherein the base station receives CSI and HARQ feedback based on an indication of a reporting mode, at least one PRI, and at least one time slot. The apparatus may further include: a unit for transmitting a first PRI and a first time slot in the DCI, wherein code points of the DCI are associated with a second PRI and a second time slot, and wherein if the first PRI matches the second PRI and the first time slot matches the second time slot, the base station receives the CSI report together with the HARQ feedback. The aforementioned unit may be one or more components of the aforementioned components of apparatus 1402 and / or a processing system 1514 of apparatus 1402' configured to perform the functions described by the aforementioned unit. As described above, the processing system 1514 may include a TX processor 316, an RX processor 370, and a controller / processor 375. Therefore, in one configuration, the aforementioned unit may be the TX processor 316, the RX processor 370, and the controller / processor 375 configured to perform the functions described by the aforementioned unit.

[0148] The following examples are merely illustrative, and their aspects may be combined with, but are not limited to, other embodiments or teaching aspects described herein.

[0149] Example 1 is a method for wireless communication at a user equipment (UE), comprising: receiving downlink communication that triggers a channel state information (CSI) report; determining whether to report the CSI together with a hybrid automatic repeat request (HARQ) feedback; and transmitting the CSI and the HARQ feedback based on the determination of whether to report the CSI together with the HARQ feedback.

[0150] In Example 2, the method described in Example 1 further includes: the UE reporting the CSI together with the HARQ feedback.

[0151] In Example 3, the method of Example 1 or Example 2 further includes: the UE using timing for the HARQ feedback to report the CSI and the HARQ feedback.

[0152] In Example 4, the method of any one of Examples 1-3 further includes: the UE determining, based on the relationship between the CSI calculation time and the timing used for the HARQ feedback, to use the timing used for the HARQ feedback to report the CSI together with the HARQ feedback.

[0153] In Example 5, the method of any one of Examples 1-4 further includes: the UE determining, based on the fact that the CSI report is a simplified CSI report, to report the CSI together with the HARQ feedback using the timing for the HARQ feedback.

[0154] In Example 6, the method of any one of Examples 1-5 further includes: the simplified CSI report is determined based on one or more of the Physical Downlink Shared Channel (PDSCH) or Downlink Demodulation Reference Signal (DM-RS).

[0155] In Example 7, the method of any one of Examples 1-6 further includes: the simplified CSI report includes a broadband CSI report having no more than two Channel State Information Reference Signal (CSI-RS) ports in a single resource.

[0156] In Example 8, the method of any one of Examples 1-7 further includes: the UE using the timing for the CSI feedback to report the CSI and the HARQ feedback.

[0157] In Example 9, the method of any one of Examples 1-8 further includes: the UE determining, based on the timing for the CSI being greater than the HARQ feedback timing, to use the timing for the CSI to report the CSI together with the HARQ feedback.

[0158] In Example 10, the method of any one of Examples 1-9 further includes: the timing for the CSI feedback includes a timeline for reporting the CSI together with the HARQ feedback.

[0159] In Example 11, the method of any one of Examples 1-10 further includes: the UE using a control channel resource different from the HARQ feedback to report the CSI.

[0160] In Example 12, the method according to any one of Examples 1-11 further includes: receiving an indication of a reporting mode from a base station, wherein the UE determines whether to report the CSI together with the HARQ feedback based on the indication of the reporting mode.

[0161] In Example 13, the method of any one of Examples 1-12 further includes: the indication being received in Radio Resource Control (RRC) signaling.

[0162] In Example 14, the method of any one of Examples 1-13 further includes: the indication is based on at least one of the following: the type of downlink-triggered CSI report, the CSI procedure identifier (ID), the modulation and coding scheme for scheduling the physical downlink shared channel (PDSCH), the CSI triggered by a first permission for scheduling initial transmission, the CSI triggered by a second permission for scheduling retransmission, a first number of layers for PDSCH transmission, a second number of transport blocks for PDSCH transmission, a third number of resource blocks for PDSCH transmission, a subband CSI report configured for the UE, or a wideband CSI report configured for the UE.

[0163] In Example 15, the method of any one of Examples 1-14 further includes: the indication is received in downlink control information (DCI).

[0164] In Example 16, the method of any one of Examples 1-15 further includes: the UE determining whether to report the CSI together with the HARQ feedback based on the amount of time between the downlink communication that triggers the CSI report and the uplink control channel resources used for the transmission of the CSI report.

[0165] In Example 17, the method of any one of Examples 1-16 further includes: when the time amount is less than a first threshold, the UE reports a simplified CSI report together with the HARQ feedback, or wherein when the time amount is less than a second threshold, the UE uses a different control channel resource than the HARQ feedback to report the CSI.

[0166] In Example 18, the method of any one of Examples 1-17 further includes: when the time amount is greater than the first threshold, the UE reports the configured CSI report together with the HARQ feedback.

[0167] In Example 19, the method according to any one of Examples 1-18 further includes: receiving a Physical Uplink Control Channel Resource Indication (PRI) and a time gap between Physical Downlink Shared Channel transmission and the HARQ feedback, wherein the UE uses the resources indicated by the PRI and the time gap to transmit the CSI together with the HARQ feedback.

[0168] In Example 20, the method according to any one of Examples 1-19 further includes: receiving a Physical Uplink Control Channel Resource Indication (PRI) in Downlink Control Information (DCI) and a time gap between Physical Downlink Shared Channel (PDSCH) transmission and the HARQ feedback in the downlink, wherein the CSI report is triggered by unsuccessful decoding of the PDSCH transmission, and wherein the UE uses the resources indicated by the PRI and the time gap to send the HARQ feedback.

[0169] In Example 21, the method of any one of Examples 1-20 further includes: the UE sending the CSI report using an offset applied to the resource indicated by one or more of the PRI and the time slot.

[0170] In Example 22, the method according to any one of Examples 1-21 further includes: receiving at least one of an additional PRI or an additional time slot in the DCI, and further includes: the UE using additional resources indicated by the at least one of the additional PRI or the additional time slot to send the CSI report.

[0171] In Example 23, the method according to any one of Examples 1-22 further includes: receiving an indication of a reporting mode from a base station, wherein the UE determines whether to report the CSI together with the HARQ feedback based on the indication of the reporting mode; and receiving at least one Physical Uplink Control Channel Resource Indication (PRI) and at least one time slot in downlink control information (DCI), wherein the UE transmits the CSI and the HARQ feedback based on the indication of the reporting mode, the at least one PRI, and the at least one time slot.

[0172] In Example 24, the method of any one of Examples 1-23 further includes: the indication instructing the CSI and the HARQ feedback to be transmitted separately, and the DCI instructing at least one of a first PRI and a first time slot, and a second PRI or a second time slot, wherein the UE uses the first PRI and the first time slot to transmit the HARQ feedback, and uses the second PRI or the at least one of the second time slot to transmit the CSI report.

[0173] In Example 25, the method of any one of Examples 1-24 further includes: the indication instructing the CSI to be transmitted together with the HARQ feedback, and the DCI instructing a plurality of PRIs or a plurality of time slots, wherein the UE uses one of the plurality of PRIs or one of the plurality of time slots to transmit the CSI and the HARQ feedback.

[0174] In Example 26, the method of any one of Examples 1-25 further includes: the indication instructing the CSI to be transmitted together with the HARQ feedback, and the DCI instructing a PRI and a time slot, wherein the UE uses the PRI and the time slot to transmit the CSI and the HARQ feedback.

[0175] In Example 27, the method of any one of Examples 1-26 further includes: the indication indicating that the CSI and the HARQ feedback are transmitted separately, and the DCI indicating PRI and time slot, wherein the UE uses the PRI and the time slot to transmit the HARQ feedback, and uses an offset applied to at least one of the PRI and the time slot to transmit the CSI.

[0176] In Example 28, the method according to any one of Examples 1-27 further includes: receiving a first Physical Uplink Control Channel Resource Indication (PRI) and a first time slot in downlink control information (DCI), wherein the code point of the DCI is associated with a second PRI and a second time slot, and wherein if the first PRI matches the second PRI and the first time slot matches the second time slot, the UE sends the CSI report together with the HARQ feedback.

[0177] In Example 29, the method of any one of Examples 1-28 further includes: if the first PRI is different from the second PRI or if the first time slot is different from the second time slot, then the UE uses the first PRI and the first time slot to send the HARQ feedback, and uses the second PRI and the second time slot to send the CSI report.

[0178] Example 30 is an apparatus for wireless communication at a user equipment (UE), comprising: a unit for receiving downlink communication that triggers a channel state information (CSI) report; a unit for determining whether to report the CSI together with a hybrid automatic repeat request (HARQ) feedback; and a unit for transmitting the CSI and the HARQ feedback based on the determination of whether to report the CSI together with the HARQ feedback.

[0179] In Example 31, the apparatus described in Example 30 further includes a unit for performing the method described in any one of Examples 2-29.

[0180] Example 32 is an apparatus for wireless communication at a user equipment (UE), comprising: a memory; and at least one processor coupled to the memory and configured to perform the method described in any one of Examples 1-29.

[0181] Example 33 is a computer-readable medium storing computer-executable code for wireless communication at a user equipment (UE), which, when executed by a processor, causes the processor to perform the method described in any one of Examples 1-29.

[0182] Example 34 is a method of wireless communication at a base station, comprising: sending downlink communication that triggers a Channel State Information (CSI) report; instructing a UE whether to report the CSI together with a Hybrid Automatic Repeat Request (HARQ) feedback; and receiving the CSI and the HARQ feedback based on the instruction.

[0183] In Example 35, the method of Example 34 further includes: the base station receiving the CSI together with the HARQ feedback.

[0184] In Example 36, the method of Example 34 or Example 35 further includes: the base station using timing for the HARQ feedback to receive the CSI and the HARQ feedback.

[0185] In Example 37, the method of any one of Examples 34-36 further includes: the base station receiving the CSI together with the HARQ feedback using the timing for the HARQ feedback based on the relationship between the CSI calculation time and the timing for the HARQ feedback.

[0186] In Example 38, the method of any one of Examples 34-37 further includes: the base station receiving the CSI together with the HARQ feedback using the timing for the HARQ feedback, based on the fact that the CSI report is a simplified CSI report.

[0187] In Example 39, the method of any one of Examples 34-38 further includes: the simplified CSI report is based on one or more of the Physical Downlink Shared Channel (PDSCH) or Downlink Demodulation Reference Signal (DM-RS).

[0188] In Example 40, the method of any one of Examples 34-39 further includes: the simplified CSI report includes a wideband CSI report having no more than two Channel State Information Reference Signal (CSI-RS) ports in a single resource.

[0189] In Example 41, the method of any one of Examples 34-40 further includes: the base station using timing for the CSI feedback to receive the CSI and the HARQ feedback.

[0190] In Example 42, the method of any one of Examples 34-41 further includes: the base station using the timing for the CSI to receive the CSI together with the HARQ feedback based on the timing for the CSI being greater than the HARQ feedback timing.

[0191] In Example 43, the method of any one of Examples 34-42 further includes: the timing for the CSI feedback includes a timeline for reporting the CSI together with the HARQ feedback.

[0192] In Example 44, the method of any one of Examples 34-43 further includes: the base station using control channel resources different from the HARQ feedback to receive the CSI.

[0193] In Example 45, the method of any one of Examples 34-44 further includes: the base station sending an indication of a reporting mode to the UE, wherein the base station receives the CSI together with the HARQ feedback based on the indication of the reporting mode.

[0194] In Example 46, the method of any one of Examples 34-45 further includes: the indication is sent to the UE in Radio Resource Control (RRC) signaling.

[0195] In Example 47, the method of any one of Examples 34-46 further includes: the indication is based on at least one of the following: the type of downlink-triggered CSI report, the CSI procedure identifier (ID), the modulation and coding scheme for scheduling the physical downlink shared channel (PDSCH), the CSI triggered by a first permission for scheduling initial transmission, the CSI triggered by a second permission for scheduling retransmission, a first number of layers for PDSCH transmission, a second number of transport blocks for PDSCH transmission, a third number of resource blocks for PDSCH transmission, a subband CSI report configured for the UE, or a wideband CSI report configured for the UE.

[0196] In Example 48, the method of any one of Examples 34-47 further includes: the indication is sent in downlink control information (DCI).

[0197] In Example 49, the method of any one of Examples 34-48 further includes: the base station receiving the CSI together with the HARQ feedback based on the amount of time between the downlink communication that triggers the CSI report and the uplink control channel resources for transmitting the CSI report.

[0198] In Example 50, the method of any one of Examples 34-49 further includes: when the time amount is less than a first threshold, the base station receives a simplified CSI report together with the HARQ feedback, or when the time amount is less than a second threshold, the base station receives the CSI using a different control channel resource than the HARQ feedback.

[0199] In Example 51, the method of any one of Examples 34-50 further includes: when the time amount is greater than the first threshold, the base station receives the configured CSI report together with the HARQ feedback.

[0200] In Example 52, the method according to any one of Examples 34-51 further includes: transmitting a Physical Uplink Control Channel Resource Indication (PRI) and a time gap between Physical Downlink Shared Channel transmission and the HARQ feedback, wherein the base station uses resources indicated by the PRI and the time gap to receive the CSI together with the HARQ feedback.

[0201] In Example 53, the method according to any one of Examples 34-52 further includes: transmitting a Physical Uplink Control Channel Resource Indication (PRI) in Downlink Control Information (DCI) and a time gap between Physical Downlink Shared Channel (PDSCH) transmission and the HARQ feedback in the downlink, wherein the CSI report is triggered by unsuccessful decoding of the PDSCH transmission, and wherein the base station uses the resources indicated by the PRI and the time gap to receive the HARQ feedback.

[0202] In Example 54, the method of any one of Examples 34-53 further includes: the base station receiving the CSI report using an offset applied to the resource indicated by one or more of the PRI and the time slot.

[0203] In Example 55, the method according to any one of Examples 34-54 further includes: transmitting at least one of an additional PRI or an additional time slot in the DCI, wherein the base station uses additional resources indicated by the additional PRI or the additional time slot to receive the CSI report.

[0204] In Example 56, the method of any one of Examples 34-55 further includes: the base station sending an indication of a reporting mode from the base station, the method further including: sending at least one Physical Uplink Control Channel Resource Indication (PRI) and at least one time slot in downlink control information (DCI), wherein the base station receives the CSI and the HARQ feedback based on the indication of the reporting mode, the at least one PRI and the at least one time slot.

[0205] In Example 57, the method of any one of Examples 34-56 further includes: the base station instructing the CSI and the HARQ feedback to be transmitted separately, and the DCI instructing at least one of a first PRI and a first time interval, and a second PRI or a second time interval, wherein the base station uses the first PRI and the first time interval to receive the HARQ feedback, and uses the at least one of the second PRI or the second time interval to receive the CSI report.

[0206] In Example 58, the method of any one of Examples 34-57 further includes: the base station instructing the CSI to be transmitted together with the HARQ feedback, and the DCI instructing a plurality of PRIs or a plurality of time slots, wherein the base station uses one of the plurality of PRIs or one of the plurality of time slots to receive the CSI and the HARQ feedback.

[0207] In Example 59, the method of any one of Examples 34-58 further includes: the base station instructing the CSI to be transmitted together with the HARQ feedback, and the DCI instructing a PRI and a time slot, wherein the base station uses the PRI and the time slot to receive the CSI and the HARQ feedback.

[0208] In Example 60, the method of any one of Examples 34-59 further includes: the base station instructing the CSI to be transmitted separately from the HARQ feedback, and the DCI instructing a PRI and a time slot, wherein the base station uses the PRI and the time slot to receive the HARQ feedback, and uses an offset applied to at least one of the PRI and the time slot to receive the CSI.

[0209] In Example 61, the method according to any one of Examples 34-60 further includes: transmitting a first Physical Uplink Control Channel Resource Indication (PRI) and a first time slot in downlink control information (DCI), wherein the code point of the DCI is associated with a second PRI and a second time slot, and wherein if the first PRI matches the second PRI and the first time slot matches the second time slot, the base station receives the CSI report together with the HARQ feedback.

[0210] In Example 62, the method of any one of Examples 34-61 further includes: if the first PRI is different from the second PRI or if the first time slot is different from the second time slot, the base station uses the first PRI and the first time slot to receive the HARQ feedback and uses the second PRI and the second time slot to receive the CSI report.

[0211] Example 63 is an apparatus for wireless communication at a base station, comprising: a unit for transmitting downlink communication that triggers a Channel State Information (CSI) report; a unit for instructing a UE whether to report the CSI together with a Hybrid Automatic Repeat Request (HARQ) feedback; and a unit for receiving the CSI and the HARQ feedback based on the instruction.

[0212] In Example 64, the apparatus described in Example 63 further includes a unit for performing the method described in any one of Examples 35-62.

[0213] Example 65 is an apparatus for wireless communication at a base station, comprising: a memory; and at least one processor coupled to the memory and configured to perform the method described in any one of Examples 34-62.

[0214] Example 66 is a computer-readable medium storing computer-executable code for wireless communication at a base station, which, when executed by a processor, causes the processor to perform any one of Examples 34-62.

[0215] Additional public information is included in the appendix.

[0216] It should be understood that the specific order or hierarchy of the boxes in the disclosed process / flowchart is illustrative of the example method. It should be understood that the specific order or hierarchy of the boxes in the process / flowchart may be rearranged based on design preferences. Furthermore, some boxes may be combined or omitted. The appended method claims give the elements of each box in a sample order, but this does not imply limitation to the given specific order or hierarchy.

[0217] The foregoing description is provided to enable any person skilled in the art to implement 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, this claim is not intended to be limited to the aspects shown herein, but rather to be consistent with the full scope expressed in the claims, wherein, unless expressly stated otherwise, reference to the singular form is not intended to mean “one and only one,” but rather “one or more.” The term “exemplary” is used herein to mean “as an example, instance, or illustration.” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred over or superior to other aspects. Unless otherwise expressly 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 multiples of A, multiples of B, or multiples of C. Specifically, combinations such as "at least one of A, B, or C", "one or more of A, B, or C", "at least one of A, B, and C", "one or more of A, B, and C", and "A, B, C, or any combination thereof" can be A only, B only, C only, A and B, A and C, B and C, or A and B and C, wherein any such combination may contain one or more members of A, B, or C. All structural and functional equivalents of the elements pervading the various aspects described in this disclosure, known to or to be known later by one of ordinary skill in the art, are expressly incorporated herein by reference and are intended to be included by the claims. Furthermore, nothing in the disclosure herein is intended to be offered to the public, whether or not such disclosure is expressly stated in the claims. Terms such as "module," "mechanism," "element," and "device" may not be substitutes for the term "unit." Therefore, no claim element is to be interpreted as a functional unit unless the element is expressly stated using the phrase "unit for..."

[0218] Timeline and resource allocation for CSI reports triggered by DL

[0219] HARQ-ACK Report:

[0220] K0 is implicitly determined by the TDRA table in the DL permission (DCI format 1_0 or 1_1 or 1-2).

[0221] K1 is explicitly indicated in the DL approval (DCI format 1_0, 1_1, or 1-2).

[0222]

[0223] shortcoming:

[0224] When NACK is received at gNB, slow rate / MCS / Tx power adaptation / adjustment retransmission

[0225] - No CQI / CSI information is associated with NACK. The gNB does not know how to adjust the MCS / rate for retransmission.

[0226] - In the case of the old HARQ-ACK, CQI / CSI feedback is based on 1) the inflexible P-CSI feedback, which must be triggered by a separate UL-approved A-CSI, and the A-CSI timeline is slower than the HARQ-ACK timeline (i.e., even if scheduled in the same time slot, they cannot be fed back in the same time slot).

[0227] Correlating / bundling CQI / CSI feedback with HARQ-ACK feedback allows gNBs to perform faster and more accurate MCS / rate / Tx power matching. CSI reports can be explicitly triggered (e.g., via information fields in the DCI) or implicitly triggered (e.g., via NAK) by DL permission.

[0228] A typical use case is URLLC. Turbo HARQ-ACK allows for more reliable retransmissions. In the case of Turbo-ACK, typically one retransmission is sufficient to guarantee 10... -5 Reliability and low latency (e.g., 5ms). In the case of older HARQ-ACK, more retransmissions were required because the MCS / rate / power was slower.

[0229]

[0230] CSI reports triggered by DL can be further categorized as follows:

[0231] Type 1 - Periodically Triggered: DL CSI is not triggered by L1 (e.g., PDSCH decoding failure), but is used for more flexible CSI triggering and transmission (on PUCCH); this is similar to A-CSI being triggered by a UL DCI report on PUSCH. Type 2 - Turbo-HARQ Triggered: DL CSI reporting is triggered by an L1 process (e.g., PDSCH decoding failure), and this type can be used as a last resort for HARQ operations to complete the task.

[0232] HARQ-ACK and CSI Preparation Timeline

[0233] Table 5.3-1: PDSCH processing time for PDSCH processing capacity 1

[0234]

[0235] Table 5.3-2: PDSCH processing time for PDSCH processing capacity 2

[0236]

[0237] N represents the minimum number of symbols required by the UE from the end of the PDSCH to the start of the PUCCH resource carrying HARQ-ACK.

[0238] Table 5.4-1: CSI Calculation Delay Requirements 1

[0239]

[0240] Table 5.4-2: CSI Calculation Delay Requirements 2

[0241]

[0242] Z corresponds to the time interval between the end of the PDCCH that triggers the report and the start of the PUSCH that carries the report, and Z' is the time interval between the end of the latest CSI-RS / IM for the measurement corresponding to the report and the start of the PUSCH that carries the report.

[0243] and Where M is the number of updated CSI reports, and according to sub-clause 5.2.1.6, (Z(m), Z'(m)) corresponds to the m-th updated CSI report and is defined as:

[0244] - In Table 5.4-1, (Z1, Z1') is used if the CSI is triggered without a PUSCH having a transport block or HARQ-ACK or both (when L = 0 CPUs are occupied) (according to Subclause 5.2.1.6), and the CSI to be sent is a single CSI and corresponds to a wideband frequency granularity, where the CSI corresponds to a maximum of 4 CSI-RS ports in a single resource without CRI reports, and where CodebookType is set to 'typeI-SinglePanel', or where reportQuantity is set to 'cri-RI-CQI', or

[0245] - In Table 5.4-2, (Z1, Z1') is used if the CSI to be sent corresponds to a wideband frequency granularity, where the CSI corresponds to a maximum of 4 CSI-RS ports in a single resource without CRI reports, and where CodebookType is set to 'typeI-SinglePanel', or where reportQuantity is set to 'cri-RI-CQI', or

[0246] - In Table 5.4-2, (Z3, Z3') is used if reportQuantity is set to 'cri-RSRP' or 'ssb-Index-RSRP', where Xμ is based on the UE's reporting capability beamReportTiming, and KB l Based on the capability beamSwitchTiming reported by the UE, as defined in [13,TS 38.306] - otherwise (Z2,Z2') in Table 4.

[0247] Problem Statement

[0248] Timeline considerations:

[0249] - Typically, two types of CSI reports triggered by deep learning can be considered:

[0250] - Case 1: For a CSI report triggered by a type 1 DL, the UE needs to provide a HARQ-ACK for PDSCH, as well as the CSI triggered by the DL.

[0251] - Scenario 2: For CSI reports triggered by type 2, CSI calculation can be less burdensome; for example, the UE calculates CSI based on PDSCH SINR or using DL DMRS.

[0252] - Assuming the workload requires CSI calculation, the minimum processing time for HARQ-ACK and CSI may be similar or different.

[0253] - How do I define a new timeline and how do I instruct the user to follow a specific path?

[0254] Resource allocation for reporting:

[0255] Depending on the specific situation, HARQ-ACK and CSI may need to be fed back by the UE together or separately.

[0256] - How do I specify the resource used for reporting (more specifically, the PUCCH resource)?

[0257] Reporting format

[0258] We can assume three different modes of operation (note that in all cases, CSI and HARQ-ACK are triggered by a single DLDCI): - Mode 1: CSI and HARQ-ACK are reported together without any timeline changes (i.e., a timeline similar to that of sending only HARQ-ACK).

[0259] -Mode 2: Report CSI and HARQ-ACK together, and delay the reporting compared to the time when only HARQ-ACK should be sent.

[0260] - Mode 3: Report CSI and HARQ-ACK feedback separately, i.e. at different times and on different PUCCH resources.

[0261] Scenarios for use in reporting mode:

[0262] Mode 1:

[0263] This operating mode can be enabled whenever the CSI calculation timeline is the same as HARQ-ACK.

[0264] For example, when CSI calculation is based on PDSCH or DL ​​DM-RS (e.g., when CSI is reported after PDSCH decoding has failed), this could be a type 2 triggered CSI calculation timeline scenario; the UE only reports CQI or some indication of how much more resources are needed so that PDSCH is more likely to be successfully decoded in the next transmission of the same TB.

[0265] - For this sub-mode, the CSI calculation timeline is equal to N1 and is defined in the same way.

[0266] This mode can be enabled even when CSI computation load is low, even with reports triggered using Type 1DL. For example, this mode can be used for broadband CSI reporting with one or two CSI-RS ports in a single resource.

[0267] Mode 2:

[0268] This mode can be used whenever both CSI reports and HARQs are fed back together, but the time spent on CSI calculations is greater than that spent on HARQ-ACK reports alone (e.g., when (Z, Z') must be selected from Table 5.4-1 or Table 5.4-2). As another example, it is possible that CSI calculations are even based on...

[0269] - A separate timeline, meaning that a new timeline can be specified for CSI+HARQ reporting.

[0270] More details about signaling and UE behavior are given in the next slide.

[0271] Mode 3:

[0272] This mode can be used in the following scenarios: the gNB may not want to delay the HARQ-ACK report (as is the case in mode 2) and may want to use the CSI report for other transmissions and retransmissions that are not necessarily the same TB.

[0273] In such a case, the timelines used for HARQ-ACK and CSI reports may follow two separate timelines.

[0274] Choosing between reporting modes

[0275] 1. The reporting mode can be indicated by the gNB to the UE:

[0276] Using RRC, the UE can be instructed whether to report CSI for DL-triggered HARQ-ACK based on mode 1, 2, or 3. Additionally, the gNB can indicate which mode to follow based on the type of DL-triggered CSI report. For example, for type 2, the UE can be instructed to follow mode 1, but for type 1, the UE can be instructed to follow mode 2 or 3.

[0277] The reporting mode can be further explicitly indicated in the DL DCI, or it can be bound to the CSI process ID via RRC signaling, the MCS table for scheduling PDSCH, whether the CSI is triggered by permission to schedule the initial transmission or retransmission, the number of layers or TBS / #RB for PDSCH transmission, and whether it is a subband CSI report or a wideband CSI report configured to trigger the CSI-ReportConfig (some details are available in the appendix).

[0278] 2: The reporting mode can be indicated based on a timeline (i.e., the gap between DL and the PUCCH resource carrying the report).

[0279] If the gap between the PDCCH and PUCCH is only sufficient for a Type 2 CSI report, the UE follows a Type 2 report. Alternatively, the gap may be only sufficient for a HARQ-ACK report; in such cases, no CSI report is made.

[0280] With larger gaps, the UE can report more relevant CSI updates.

[0281] For example, DL allows triggering a CSI report for a given CSI-ReportConfig. If there is insufficient gap until the PUCCH resource is available, the gNB implicitly instructs the UE to report a light CSI or to report HARQ-ACK and CSI separately and at different times.

[0282] PUCCH resource indication for HARQ-ACK+CSI

[0283] Different situations should be considered separately:

[0284] Scenario 1: A single PRI and K1 field exist in DL DCI.

[0285] - The UE is configured to send CSI (e.g., a CSI report triggered according to type 2DL) or the CSI trigger field in the DCI only triggers the reportConfig that is configured to have CSI triggered by type 2DL.

[0286] In such a case, the UE sends CSI and HARQ-ACK on the same resource indicated by PRI.

[0287] This can be applied to both Mode 1 and Mode 2 reports.

[0288] Scenario 2: There is a single PRI and K1 field in DL DCI, but the CSI triggering event can be based on L1. For example, when decoding based on PDSCH fails, the UE reports CSI, and the UE may not send CSI or may send more related CSIs.

[0289] - In such a case, if no CSI is sent, UE 802 can use PRI and K1 given in DCI to report HARQ-ACK.

[0290] - If the UE needs to report CSI, it can add a predetermined offset to K1 or PRI or both. The UE then sends CSI and HARQ-ACK on the inferred PUCCH resource.

[0291] Case 3: Given two sets of PRI and / or K1 in the DCI to handle the scenario interpreted in Case 2.

[0292] Scenario 4: DCI instructions should be sent together or separately for HARQ-ACK and CSI.

[0293] - If two sets of K1 and / or PRI are configured to exist in the DCI and instruct the UE to send feedback separately, the UE uses the two sets of PRI and / or K1 values ​​to feed back HARQ-ACK and CSI accordingly.

[0294] - If two sets of K1 and / or PRI are configured to exist in the DCI and instruct the UE to send feedback together, then the UE uses either the first set of K1 and / or PRI or the second set of K1 and / or PRI.

[0295] - If a set of K1 and / or PRI is configured in the DCI and instructs the UE to send feedback together, the UE uses the indicated resources.

[0296] - If a set of K1 and / or PRI is configured in the DCI and the UE is instructed to send feedback separately, the UE uses the indicated PRI / K1 to determine the resource, and the UE determines the second resource based on this (e.g., based on some offset indicated to the UE).

[0297] Case 5: DCI implicitly indicates whether HARQ-ACK and CSI should be sent together or separately.

[0298] A set of K1 and / or PRI is configured to exist in the DL DCI. However, each code point indicates an additional K1 / PRI. If the values ​​are the same, the UE reports feedback together, while if the values ​​are different, the first value is used for HARQ and the second value is used for CSI reporting.

[0299] CSI on PUSCH

[0300]

[0301] Offset

[0302] -X: The gap between PDCCH and CSI-RS

[0303] - This is the RRC configured for each CSI-RS resource.

[0304] -Y: Gap between PDCCH and A-CSI on PUSCH

[0305] This is signaled by reusing the Time Domain Resource Allocation (TDRA) field in the UL permission used for the corresponding PUSCH transmission.

[0306] Resources used for A-CSI transmission

[0307] - Send A-CSI on PUSCH; indicate the corresponding resources in the frequency domain in UL permission via frequency domain resource allocation.

[0308]

Claims

1. A method for wireless communication at a user equipment (UE), comprising: Downlink communication that triggers Channel State Information (CSI) reports; Determine whether to report CSI along with Hybrid Automatic Repeat Request (HARQ) feedback; The time gap between receiving the Physical Uplink Control Channel Resource Indicator (PRI) and the Physical Downlink Shared Channel (PDSCH) transmission in the Downlink Control Information (DCI) and the HARQ feedback; as well as Based on the determination of whether to report the CSI together with the HARQ feedback, the CSI and the HARQ feedback are sent, wherein the CSI report is triggered by unsuccessful decoding of the PDSCH transmission, and wherein the UE uses the resources indicated by the PRI and the time interval to send the HARQ feedback.

2. The method according to claim 1, wherein, The UE reports the CSI together with the HARQ feedback.

3. The method according to claim 2, wherein, The UE uses timing for the HARQ feedback to report the CSI and the HARQ feedback.

4. The method according to claim 3, wherein, The UE determines, based on the relationship between the CSI calculation time and the timing used for the HARQ feedback, to use the timing for the HARQ feedback to report the CSI together with the HARQ feedback.

5. The method according to claim 3, wherein, The UE determines, based on the fact that the CSI report is a simplified CSI report, to use the timing for the HARQ feedback to report the CSI together with the HARQ feedback.

6. The method according to claim 5, wherein, The simplified CSI report is determined based on one or more of the Physical Downlink Shared Channel (PDSCH) or Downlink Demodulation Reference Signal (DM-RS).

7. The method according to claim 5, wherein, The simplified CSI report includes a broadband CSI report with no more than two Channel State Information Reference Signal (CSI-RS) ports in a single resource.

8. The method according to claim 1, wherein, The UE uses a different control channel resource than the HARQ feedback to report the CSI.

9. The method according to claim 1, further comprising: The UE receives an indication of a reporting mode from the base station, wherein the UE determines whether to report the CSI together with the HARQ feedback based on the indication of the reporting mode.

10. The method according to claim 9, wherein, The instruction was received in Radio Resource Control (RRC) signaling.

11. The method according to claim 9, wherein, The instruction is based on at least one of the following: Types of downlink-triggered CSI reports CSI process identifier (ID), Modulation and coding schemes used for scheduling the Physical Downlink Shared Channel (PDSCH), The CSI is triggered by the first permission of the initial transmission scheduled. The CSI triggered by the second permission for scheduled retransmission, The first number of layers used for PDSCH transmission. The second number of transport blocks used for the PDSCH transmission The third number of resource blocks used for the PDSCH transmission. The subband CSI report configured for the UE, or Broadband CSI report configured for the UE.

12. The method according to claim 9, wherein, The instruction is received in the downlink control information (DCI).

13. The method according to claim 1, wherein, The UE determines whether to report the CSI together with the HARQ feedback based on the amount of time between the downlink communication that triggers the CSI report and the uplink control channel resources used for transmitting the CSI report.

14. The method according to claim 13, wherein, When the time duration is less than a first threshold, the UE will report a simplified CSI report along with the HARQ feedback, or When the time duration is less than the second threshold, the UE uses a different control channel resource than the HARQ feedback to report the CSI.

15. The method according to claim 14, wherein, When the time exceeds the first threshold, the UE will report the configured CSI report together with the HARQ feedback.

16. The method according to claim 1, wherein, The UE uses resources indicated by the PRI and the time slot to send the CSI together with the HARQ feedback.

17. The method according to claim 1, wherein, The UE uses an offset applied to the resource indicated by one or more of the PRI and the time slot to send the CSI report.

18. The method according to claim 1, further comprising: The UE receives at least one of an additional PRI or an additional time slot in the DCI, wherein the UE uses additional resources indicated by the additional PRI or the additional time slot to send the CSI report.

19. The method according to claim 1, further comprising: The UE receives an indication of a reporting mode from the base station, wherein the UE determines whether to report the CSI together with the HARQ feedback based on the indication of the reporting mode, wherein the UE sends the CSI and the HARQ feedback based on the indication of the reporting mode, the PRI, and the time interval.

20. The method according to claim 19, wherein, The instruction indicates that the CSI and the HARQ feedback are sent separately, and the DCI indicates at least one of a first PRI and a first time interval, and a second PRI or a second time interval. The UE uses the first PRI and the first time interval to send the HARQ feedback, and uses at least one of the second PRI or the second time interval to send the CSI report.

21. The method according to claim 19, wherein, The indication indicates that the CSI is sent together with the HARQ feedback, and the DCI indicates multiple PRIs or multiple time slots, wherein the UE uses one of the multiple PRIs or one of the multiple time slots to send the CSI and the HARQ feedback.

22. The method according to claim 19, wherein, The instruction indicates that the CSI is sent together with the HARQ feedback, and the DCI indicates a PRI and a time slot, wherein the UE uses the PRI and the time slot to send the CSI and the HARQ feedback.

23. The method according to claim 19, wherein, The instruction indicates that the CSI and the HARQ feedback are transmitted separately, and wherein the UE uses the PRI and the time gap to transmit the HARQ feedback, and uses an offset applied to at least one of the PRI and the time gap to transmit the CSI.

24. The method according to claim 1, further comprising: In the downlink control information (DCI), a first physical uplink control channel resource indication (PRI) and a first time slot are received, wherein the code points of the DCI are associated with a second PRI and a second time slot, and If the first PRI matches the second PRI and the first time interval matches the second time interval, the UE will send the CSI report together with the HARQ feedback.

25. The method according to claim 24, wherein, If the first PRI is different from the second PRI or if the first time slot is different from the second time slot, the UE uses the first PRI and the first time slot to send the HARQ feedback and uses the second PRI and the second time slot to send the CSI report.

26. An apparatus for wireless communication at a user equipment (UE), comprising: A unit used for receiving downlink communication that triggers Channel State Information (CSI) reports; A unit used to determine whether to report CSI along with Hybrid Automatic Repeat Request (HARQ) feedback; A unit for receiving the Physical Uplink Control Channel Resource Indication (PRI) and the time gap between the Physical Downlink Shared Channel (PDSCH) transmission and the HARQ feedback in the downlink control information (DCI); as well as A unit for sending the CSI and the HARQ feedback based on determining whether to report the CSI together with the HARQ feedback, wherein the CSI report is triggered by unsuccessful decoding of the PDSCH transmission, and wherein the UE uses the resources indicated by the PRI and the time interval to send the HARQ feedback.

27. The apparatus of claim 26, further comprising a unit for performing the method of any one of claims 2-25.

28. An apparatus for wireless communication at a user equipment (UE), comprising: Memory; as well as At least one processor coupled to the memory and configured to perform the method of any one of claims 1-25.

29. A computer-readable medium storing computer-executable code for wireless communication at a user equipment (UE), said code, when executed by a processor, causing the processor to perform the method of any one of claims 1-25.

30. A method for wireless communication at a base station, comprising: Send downlink communication that triggers a Channel State Information (CSI) report from the User Equipment (UE); Instruct the UE whether to report the CSI together with the Hybrid Automatic Repeat Request (HARQ) feedback; The time gap between transmitting the Physical Uplink Control Channel Resource Indicator (PRI) and the Physical Downlink Shared Channel (PDSCH) transmission in the Downlink Control Information (DCI) and the HARQ feedback; as well as The CSI and HARQ feedback are received based on the indication, wherein the CSI report is triggered by unsuccessful decoding of the PDSCH transmission, and wherein the base station uses the resources indicated by the PRI and the time interval to receive the HARQ feedback.

31. The method according to claim 30, wherein, The base station receives the CSI together with the HARQ feedback.

32. The method according to claim 31, wherein, The base station uses timing for the HARQ feedback to receive the CSI and the HARQ feedback.

33. The method according to claim 32, wherein, The base station uses the timing for the HARQ feedback to receive the CSI and the HARQ feedback together, based on the relationship between the CSI calculation time and the timing used for the HARQ feedback.

34. The method according to claim 32, wherein, The base station receives the CSI together with the HARQ feedback using the timing specified for the HARQ feedback, based on the fact that the CSI report is a simplified CSI report.

35. The method according to claim 34, wherein, The simplified CSI report is based on one or more of the Physical Downlink Shared Channel (PDSCH) or Downlink Demodulation Reference Signal (DM-RS).

36. The method according to claim 34, wherein, The simplified CSI report includes a broadband CSI report with no more than two Channel State Information Reference Signal (CSI-RS) ports in a single resource.

37. The method of claim 30, wherein, The base station uses different control channel resources than the HARQ feedback to receive the CSI.

38. The method according to claim 30, wherein, The base station sends an indication of a reporting mode to the UE, and the base station receives the CSI together with the HARQ feedback based on the indication of the reporting mode.

39. The method according to claim 38, wherein, The instruction is sent to the UE in Radio Resource Control (RRC) signaling.

40. The method of claim 38, wherein, The instruction is based on at least one of the following: Types of downlink-triggered CSI reports CSI process identifier (ID), Modulation and coding schemes used for scheduling the Physical Downlink Shared Channel (PDSCH), The CSI is triggered by the first permission of the initial transmission scheduled. The CSI triggered by the second permission for scheduled retransmission, The first number of layers used for PDSCH transmission. The second number of transport blocks used for the PDSCH transmission The third number of resource blocks used for the PDSCH transmission. The subband CSI report configured for the UE, or Broadband CSI report configured for the UE.

41. The method according to claim 38, wherein, The instruction is sent in the downlink control information (DCI).

42. The method according to claim 30, wherein, The base station receives the CSI along with the HARQ feedback based on the amount of time between the downlink communication that triggers the CSI report and the uplink control channel resources used for transmitting the CSI report.

43. The method according to claim 42, wherein, When the time duration is less than a first threshold, the base station receives a simplified CSI report along with the HARQ feedback; or, when the time duration is less than a second threshold, the base station uses different control channel resources than the HARQ feedback to receive the CSI.

44. The method according to claim 43, wherein, When the time duration exceeds the first threshold, the base station will receive the configured CSI report along with the HARQ feedback.

45. The method of claim 30, wherein, The base station uses resources indicated by the PRI and the time interval to receive the CSI together with the HARQ feedback.

46. ​​The method of claim 30, wherein, The base station uses an offset applied to the resource indicated by one or more of the PRI and the time slot to receive the CSI report.

47. The method of claim 30, further comprising: In the DCI, at least one of an additional PRI or an additional time slot is transmitted, wherein the base station uses additional resources indicated by the additional PRI or the additional time slot to receive the CSI report.

48. The method of claim 30, wherein, The base station sends an indication of a reporting mode from the base station, wherein the base station receives the CSI and the HARQ feedback based on the indication of the reporting mode, the PRI, and the time interval.

49. The method according to claim 48, wherein, The base station instructs that the CSI and the HARQ feedback be transmitted separately, and the DCI instructs at least one of a first PRI and a first time slot, and a second PRI or a second time slot. The base station uses the first PRI and the first time interval to receive the HARQ feedback, and uses at least one of the second PRI or the second time interval to receive the CSI report.

50. The method according to claim 48, wherein, The base station instructs to send the CSI together with the HARQ feedback, and the DCI instructs multiple PRIs or multiple time slots, wherein the base station uses one of the multiple PRIs or one of the multiple time slots to receive the CSI and the HARQ feedback.

51. The method according to claim 48, wherein, The base station instructs to send the CSI together with the HARQ feedback, and the DCI instructs a PRI and a time slot, wherein the base station uses the PRI and the time slot to receive the CSI and the HARQ feedback.

52. The method according to claim 48, wherein, The base station instructs that the CSI and the HARQ feedback be transmitted separately, and wherein the base station uses the PRI and the time gap to receive the HARQ feedback, and uses an offset applied to at least one of the PRI and the time gap to receive the CSI.

53. The method of claim 30, further comprising: In the downlink control information (DCI), a first physical uplink control channel resource indication (PRI) and a first time slot are transmitted, wherein the code points of the DCI are associated with a second PRI and a second time slot, and If the first PRI matches the second PRI and the first time interval matches the second time interval, the base station will receive the CSI report together with the HARQ feedback.

54. The method according to claim 53, wherein, If the first PRI is different from the second PRI or if the first time slot is different from the second time slot, the base station uses the first PRI and the first time slot to receive the HARQ feedback and uses the second PRI and the second time slot to receive the CSI report.

55. An apparatus for wireless communication at a base station, comprising: A unit for sending downlink communication that triggers a Channel State Information (CSI) report from a User Equipment (UE); A unit used to instruct the UE whether to report CSI together with Hybrid Automatic Repeat Request (HARQ) feedback; A unit for transmitting the Physical Uplink Control Channel Resource Indicator (PRI) and the Physical Downlink Shared Channel (PDSCH) transmission in the Downlink Control Information (DCI) and the time gap between the HARQ feedback; as well as A unit for receiving the CSI and HARQ feedback based on the indication, wherein the CSI report is triggered by unsuccessful decoding of the PDSCH transmission, and wherein the base station uses the resources indicated by the PRI and the time interval to receive the HARQ feedback.

56. The apparatus of claim 55, further comprising a unit for performing the method of any one of claims 31-54.

57. An apparatus for wireless communication at a base station, comprising: Memory; as well as At least one processor coupled to the memory and configured to perform the method of any one of claims 30-54.

58. A computer-readable medium storing computer-executable code for wireless communication at a base station, said code, when executed by a processor, causing the processor to perform the method of any one of claims 30-54.

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