Soft A / N reporting trigger for SPS PDSCH

Abstract

To provide hybrid automatic repeat request (HARQ) feedback transmissions along with channel state information (CSI) reports, a UE may receive trigger information associated with sending one or more channel state information (CSI) reports associated with one or more downlink (DL) semi-persistent scheduling (SPS) transmissions in one or more physical downlink shared channel (PDSCH) opportunities. The UE may receive a first DL SPS transmission of one or more DL SPS transmissions in a first PDSCH opportunity in the one or more PDSCH opportunities. The UE may send a first CSI report associated with the first DL SPS transmission based on receiving the trigger information.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of and priority to Greek patent application serial No. 20200100528, filed on August 31, 2020, and entitled “DCI OR DMRS-DETECTION BASEDSOFT A / N REPORT TRIGGERING FOR SPS PDSCH,” the entire contents of which are expressly incorporated herein by reference. Technical Field

[0003] The present disclosure generally relates to wireless communications, and more particularly, to triggering hybrid automatic repeat request (HARQ) feedback with channel state information (CSI) for downlink semi-persistent scheduling (SPS) transmissions. Background Art

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

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

[0006] In some 5G NR communication systems, a user equipment (UE) may provide channel state information (CSI) reports in the physical uplink shared channel (PUSCH). To receive more recent CSI, the base station may utilize a downlink (DL) grant to trigger the UE's CSI report. The UE may be triggered to provide a CSI report by transmitting in the physical uplink control channel (PUCCH). However, for semi-persistent scheduling (SPS) transmissions, there may not be a DL grant, and the base station may not be able to utilize a DL grant to trigger the UE's CSI report. Summary of the Invention

[0007] The following provides a brief summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects and is neither intended to identify key or critical elements of all aspects nor to delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that will be presented later.

[0008] One innovative aspect of the subject matter described in the present disclosure can be implemented in a method for wireless communication that improves CSI reporting for DL ​​SPS transmissions, which in turn can improve overall communication quality. The method includes receiving trigger information associated with sending one or more channel state information (CSI) reports associated with one or more downlink (DL) semi-persistent scheduling (SPS) transmissions in one or more physical downlink shared channel (PDSCH) opportunities. The method also includes receiving a first DL SPS transmission of the one or more DL SPS transmissions in a first PDSCH opportunity in the one or more PDSCH opportunities. The method also includes sending a first CSI report associated with the first DL SPS transmission based on receiving the trigger information.

[0009] Another innovative aspect of the subject matter described in this disclosure can be implemented in a method for wireless communication. The method includes sending trigger information to a user equipment (UE), the trigger information associated with one or more CSI reports associated with DL SPS transmissions in one or more PDSCH opportunities, including a first PDSCH opportunity. The method includes receiving a first CSI report from the UE in a physical uplink control channel (PUCCH) based on the trigger information.

[0010] To accomplish the foregoing and related objectives, one or more aspects include the features hereinafter fully described and particularly pointed out in the claims. The following description and drawings provide illustrative features of one or more aspects. However, these features are indicative of but some of the various ways in which the principles of the various aspects may be employed, and this description is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram illustrating an example of a wireless communication system and an access network.

[0012] Figure 2A is a diagram illustrating an example of a first frame according to various aspects of the present disclosure.

[0013] Figure 2B is a diagram illustrating an example of downlink (DL) channels within a subframe according to various aspects of the present disclosure.

[0014] Figure 2C is a diagram illustrating an example of a second frame according to various aspects of the present disclosure.

[0015] Figure 2D is a diagram illustrating an example of uplink (UL) channels within a subframe according to various aspects of the present disclosure.

[0016] Figure 3 is a schematic diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0017] Figure 4 Example channel state information (CSI) on the physical uplink control channel (PUCCH) triggered by a DL grant is shown.

[0018] Figure 5 Example CSI on PUCCH triggered by a DL grant is shown.

[0019] Figure 6 Example CSI for DL ​​semi-persistent scheduling (SPS) transmission on PUCCH is shown in accordance with various aspects of the present disclosure.

[0020] Figure 7 Example CSI for DL ​​SPS transmission on PUCCH is shown in accordance with various aspects of the present disclosure.

[0021] Figure 8 Example CSI for DL ​​SPS transmission on PUCCH is shown in accordance with various aspects of the present disclosure.

[0022] Figure 9An example communication flow between a base station and a UE according to various aspects of the present disclosure is shown.

[0023] Figure 10 is a flow chart of a method of wireless communication at a UE supporting DCI or Demodulation Reference Signal (DM-RS) triggered CSI reporting in accordance with various aspects of the present disclosure.

[0024] Figure 11 is another flow chart of a method of wireless communication at a UE supporting DCI or Demodulation Reference Signal (DM-RS) triggered CSI reporting in accordance with various aspects of the present disclosure.

[0025] Figure 12 is a flow chart of a method of wireless communication at a base station that supports using DCI or DM-RS to trigger CSI reporting in accordance with various aspects of the present disclosure.

[0026] Figure 13 is another flow chart of a method of wireless communication at a base station that supports use of DCI or DM-RS to trigger CSI reporting in accordance with various aspects of the present disclosure.

[0027] Figure 14 is a schematic diagram illustrating an example of a hardware implementation for an example apparatus at a UE.

[0028] Figure 15 is a schematic diagram illustrating an example of a hardware implementation for an example apparatus at a base station. DETAILED DESCRIPTION

[0029] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configuration in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a comprehensive understanding of the various concepts. However, it will be apparent to one of ordinary skill in the art that these concepts may be practiced without these specific details. In some cases, structures and components are shown in block diagram form to avoid obscuring such concepts.

[0030] Several aspects of telecommunications systems will now be presented with reference to various apparatuses and methods. These apparatuses and methods will be described in the detailed description below and illustrated in the accompanying drawings by 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 elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0031] By way of example, an element, or any part of an element, or any combination of elements, can be implemented as a "processing system" comprising one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gating 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 is broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, processes, functions, etc.

[0032] Accordingly, in one or more examples, the functions described can be implemented in hardware, software, or any combination thereof. If implemented in software, the functions can be stored or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. Storage media can be any available medium that can be accessed by a computer. By way of example and not limitation, such computer-readable media 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, a combination of the aforementioned types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0033] Although various aspects and implementations are described in this application by way of illustration of some examples, it will be understood by those skilled in the art that additional implementations and use cases may be generated in many different arrangements and scenarios. The aspects described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, implementations or uses may be generated via integrated chip implementations and other devices based on non-module components (such as end-user devices, vehicles, communication devices, computing devices, industrial devices, retail / purchase devices, medical devices, devices supporting artificial intelligence (AI), etc.). Although some examples may or may not be specifically for use cases or applications, there may be a variety of applicable scopes for the described innovations. Implementations may have a range from chip-level or modular components to non-modular, non-chip-level implementations, and further to aggregated, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more aspects of the described innovations. In some actual settings, the devices incorporating the described aspects and features may also include additional components and features for the claimed and described implementations and practices. For example, the transmission and reception of wireless signals necessarily include multiple components for analog and digital purposes (such as hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / accumulators, etc.) The innovations described herein are intended to be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, aggregated or disaggregated components, end-user devices, etc., having different sizes, shapes, and configurations.

[0034] A base station may send a downlink grant to a user equipment (UE) to instruct the UE to provide channel state information (CSI) reports to the base station. In some examples, the base station may send wireless communications, such as semi-persistent scheduling (SPS) communications, without a downlink grant for each physical downlink shared channel (PDSCH) opportunity. However, for SPS transmissions, there may not be a DL grant, and the base station may not be able to utilize the DL grant to trigger CSI reporting by the UE.

[0035] The aspects presented herein enable a base station to trigger hybrid automatic repeat request (HARQ) feedback with CSI for downlink SPS transmissions. In some aspects, a UE may receive trigger information from a base station for sending a CSI report associated with a DL SPS transmission in a PDSCH, and may send a CSI report based on the received trigger. The trigger information may be a defined demodulation reference signal (DM-RS) or downlink control information (DCI). For example, a defined DM-RS sequence, DCI, or a field defined within the DCI may trigger the UE to send a CSI report. If the UE receives trigger information from the base station, the UE may send HARQ feedback for the downlink SPS transmission together with the CSI report. If the UE does not receive trigger information from the base station, the UE may send HARQ feedback for the downlink SPS transmission without a CSI report.

[0036] Certain implementations of the subject matter described in this disclosure can be implemented to achieve one or more of the following potential advantages. In some aspects, the disclosed techniques enable a base station to trigger a UE to provide more recent CSI information for SPS transmissions while also saving network resources by not sending DL grants. Utilizing more recent CSI information, the base station can change configuration and select transmission parameters that are more appropriate for the current channel, which in turn can improve physical uplink shared channel (PUSCH) communication and overall communication quality between the UE and the base station.

[0037] Figure 1 1 is a schematic 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 UE 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)). The base station 102 may include a macro cell (a high-power cellular base station) or a small cell (a low-power cellular base station). A macro cell includes a base station. Small cells include femto cells, pico cells, and micro cells.

[0038] Base stations 102 configured for 4G LTE (collectively referred to as the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with the EPC 160 via a backhaul link 132 (e.g., an S1 interface). Base stations 102 configured for 5G NR (collectively referred to as the Next Generation RAN (NG-RAN)) can interface with the core network 190 via a backhaul link 184. Among other functions, the base stations 102 can perform one or more of the following: transmission of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), user and device tracking, RAN information management (RIM), paging, positioning, and delivery of warning messages. Base stations 102 can communicate with each other directly or indirectly (eg, through EPC 160 or core network 190) over a third backhaul link 134 (eg, an X2 interface). First backhaul link 132, second backhaul link 184, and third backhaul link 134 can be wired or wireless.

[0039] Base stations 102 can communicate wirelessly with UEs 104. Each of base stations 102 can provide communication coverage for a corresponding geographic coverage area 110. There can be overlapping geographic coverage areas 110. For example, a small cell 102′ can have a coverage area 110′ that overlaps with the coverage area 110 of one or more macro base stations 102. A network that includes both small cells and macro cells can be referred to as a heterogeneous network. A heterogeneous network can also include home evolved Node Bs (eNBs) (HeNBs), which can provide services to a restricted group called a closed subscriber group (CSG). The communication link 120 between base station 102 and UE 104 can include uplink (UL) (also known as reverse link) transmissions from UE 104 to base station 102 or downlink (DL) (also known as forward link) transmissions from base station 102 to UE 104. The communication link 120 can use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, or transmit diversity. The communication link can be over one or more carriers. Base station 102 / UE 104 can use spectrum with up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) of bandwidth per carrier allocated in carrier aggregation for a total of up to Yx MHz (x component carriers) for transmission in each direction. The carriers may be adjacent to each other or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL ​​than for UL). Component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell), and the secondary component carrier may be referred to as a secondary cell (SCell).

[0040] Some UEs 104 can communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 can use the DL / UL WWAN spectrum. The D2D communication link 158 can use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication can be through various wireless D2D communication systems, such as, for example, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0041] 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 an unlicensed spectrum, such as the 5 GHz spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) to determine whether the channel is available before communicating.

[0042] The small cell 102' can operate in a licensed or unlicensed spectrum. When operating in an unlicensed spectrum, the small cell 102' can employ NR and use the same unlicensed spectrum (such as 5 GHz) as used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum can improve coverage or increase capacity of the access network.

[0043] The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified with the frequency range names FR1 (410 MHz - 7.125 GHz) and FR2 (24.25 GHz - 52.6 GHz). Although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the "sub-6 GHz" band in various documents and articles. Similar naming issues sometimes arise with respect to FR2, which is often (interchangeably) referred to as the "millimeter wave" band in documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz - 300 GHz), which is identified as the "millimeter wave" band by the International Telecommunication Union (ITU).

[0044] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands for these mid-band frequencies as the frequency range designation FR3 (7.125GHz-24.25GHz). The frequency bands falling within FR3 can inherit the FR1 characteristics or the FR2 characteristics, and therefore can effectively extend the features of FR1 or FR2 to mid-band frequencies. Higher frequency bands can also be explored to extend 5G NR operation to beyond 52.6GHz. For example, three higher operating bands have been identified as the frequency range designations FR4a or FR4-1 (52.6GHz-71GHz), FR4 (52.6GHz-114.25GHz), and FR5 (114.25GHz-300GHz). Each of these higher frequency bands falls within the EHF band.

[0045] In view of the above, unless otherwise specified, if the term "sub-6 GHz" is used in this document, it can be broadly referred to as a frequency that is less than 6 GHz, can be within FR1, or can include mid-band frequencies. In addition, unless otherwise specified, if the term "millimeter wave" is used in this document, it can be broadly referred to as a frequency that can include mid-band frequencies, can be within FR2, FR4, FR4-a, FR4-1, or FR5, or can be within the EHF band.

[0046] Base station 102 (whether a small cell 102' or a large cell (e.g., a macro base station)) may include 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 traditional sub-6 GHz spectrum, in millimeter wave frequencies, or near millimeter wave frequencies to communicate with UE 104. When gNB 180 operates in millimeter wave or near millimeter wave frequencies, gNB 180 may be referred to as a millimeter wave base station. Millimeter wave base station 180 may utilize beamforming 182 with UE 104 to compensate for extremely high path loss and short range. Base station 180 and UE 104 may each include multiple antennas (such as antenna elements, antenna panels, or antenna arrays) to facilitate beamforming.

[0047] Base station 180 may transmit beamformed signals in one or more transmit directions 182′ to UE 104. UE 104 may receive beamformed signals from base station 180 in one or more receive directions 182″. UE 104 may also transmit beamformed signals in one or more transmit directions to base station 180. Base station 180 may receive beamformed signals in one or more receive directions from UE 104. Base station 180 / UE 104 may perform beam training to determine optimal receive and transmit directions for each of base station 180 / UE 104. The transmit direction and receive direction for base station 180 may be the same or different. The transmit direction and receive direction for UE 104 may be the same or different.

[0048] EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. MME 162 may communicate with a Home Subscriber Server (HSS) 174. MME 162 is a control node that handles signaling between UE 104 and EPC 160. Generally, MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are transferred through Serving Gateway 166, which itself is connected to PDN Gateway 172. PDN Gateway 172 provides IP address allocation and other functions to UEs. PDN Gateway 172 and BM-SC 170 are connected to IP Services 176. IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), PS streaming services, or other IP services. The BM-SC 170 can provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 can serve as the entry point for content provider MBMS transmissions, can be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and can be used to schedule MBMS transmissions. The MBMS gateway 168 can be used to distribute MBMS services to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area broadcasting a specific service, and can be responsible for session management (start / stop) and for collecting billing information related to eMBMS.

[0049] The core network 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. The AMF 192 may communicate with a unified data management unit (UDM) 196. The AMF 192 is a control node that handles signaling between the UE 104 and the core network 190. Typically, the AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are transported through the UPF 195. The UPF 195 provides UE IP address allocation and other functions. The UPF 195 is connected to the IP service 197. The IP service 197 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a packet switched (PS) streaming service (PSS), or other IP services.

[0050] A base station may include or be referred to as a gNB, Node B, eNB, access point, base transceiver station, wireless base station, wireless transceiver, transceiver functional unit, basic service set (BSS), extended service set (ESS), transmit reception point (TRP), or some other appropriate terminology. Base station 102 provides an access point to EPC 160 or core network 190 for UE 104. Examples of UE 104 include a cellular phone, a smartphone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor / actuator, a display, or any other similarly functional device. Some of UE 104 may be referred to as IoT devices (e.g., a parking meter, a gas pump, an oven, a vehicle, a heart monitor, etc.). UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handheld device, a user agent, a mobile client, a client, or some other appropriate terminology.

[0051] Reference again Figure 1 , the UE 104 includes a CSI reporting component 199. The CSI reporting component 199 can be configured to receive trigger information, the trigger information associated with sending one or more CSI reports associated with one or more DL SPS transmissions in one or more PDSCH opportunities. The CSI reporting component 199 can be configured to receive a first DL SPS transmission among the one or more DL SPS transmissions in a first PDSCH opportunity among the one or more PDSCH opportunities, and send a first CSI report associated with the first DL SPS transmission based on the received trigger information. The base station 102 / 180 includes a CSI reporting triggering component 198. The CSI reporting triggering component 198 can be configured to send trigger information to the UE, the trigger information associated with one or more CSI reports associated with one or more DL SPS transmissions in one or more PDSCH opportunities including the first PDSCH opportunity. The CSI reporting triggering component 198 can be configured to receive a first CSI report from the UE in a physical uplink control channel (PUCCH) based on the trigger information.

[0052] Although the description below may focus on 5G NR, the concepts described herein may be applicable to other similar areas such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0053] Figure 2A FIG200 is a diagram illustrating an example of a first subframe within a 5G / NR frame structure. Figure 2B FIG230 is a diagram illustrating an example of DL channels within a 5G NR subframe. Figure 2C FIG250 is a diagram illustrating an example of a second subframe within a 5G NR frame structure. Figure 2D 280 is a diagram illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be frequency division duplex (FDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to either DL or UL, or the 5G NR frame structure may be time division duplex (TDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to both DL and UL. Figure 2A 、 2C In the example provided, it is assumed that the 5G NR frame structure is TDD, where subframe 4 is configured with slot format 28 (primarily DL), where D is DL, U is UL, and F is flexibly used between DL / UL, and subframe 3 is configured with slot format 1 (all UL). Although subframes 3 and 4 are shown as having slot formats 1 and 28, respectively, any particular subframe can be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are full DL and UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. The UE is configured with the slot format (dynamically configured via DL control information (DCI), or semi-statically / statically configured via radio resource control (RRC) signaling) via a received slot format indicator (SFI). It should be noted that the description provided herein also applies to the 5G NR frame structure as TDD.

[0054] Other wireless communication technologies may have different frame structures or different channels. A frame (10ms) may be divided into subframes of the same size (1ms). Each subframe may include one or more time slots. A subframe may also include a microslot, which may include 7, 4, or 2 symbols. Each time slot may include 7 or 14 symbols, depending on the time slot configuration. For time slot configuration 0, each time slot may include 14 symbols, and for time slot configuration 1, each time slot may include 7 symbols. The symbols on the DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also known as single carrier frequency division multiple access (SC-FDMA) symbols) (for power-limited scenarios; limited to single-stream transmission). The number of time slots within a subframe is based on the time slot configuration and numerology. For slot configuration 0, different digital schemes μ0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For slot configuration 1, different digital schemes 0 to 2 allow 2, 4, and 8 slots per subframe, respectively. Therefore, for slot configuration 0 and digital scheme μ, there are 14 symbols / slot and 2 μ time slots / subframes. The subcarrier spacing and symbol length / duration are functions of the digital scheme. The subcarrier spacing can be equal to 2 μ *15kHz, where μ is a digital scheme 0 to 4. As such, a digital scheme μ=0 has a subcarrier spacing of 15kHz, and a digital scheme μ=4 has a subcarrier spacing of 240kHz. The symbol length / duration is inversely proportional to the subcarrier spacing. Figures 2A-2D An example is provided for slot configuration 0 with 14 symbols per slot and a digital scheme μ=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs. Within a frame set, there may be one or more different bandwidth parts (BWPs) frequency-division multiplexed (see Figure 2B ). Each BWP can have a specific number scheme.

[0055] The resource grid can be used to represent the frame structure. Each time slot can include a resource block (RB) (also known as a physical RB (PRB)), which extends 12 consecutive subcarriers. The resource grid can be divided into multiple resource elements (REs). The number of bits carried by each RE can depend on the modulation scheme.

[0056] As in Figure 2AAs shown in , some of the REs carry reference (pilot) signals (RS) for the UE. In some configurations, the RS may include a demodulation RS (DM-RS) (indicated as R for one specific configuration, but other DM-RS configurations are possible) and / or a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and / or a phase tracking RS (PT-RS).

[0057] Figure 2B Examples of various DL channels within a subframe of a frame are shown. The physical downlink control channel (PDCCH) carries DCI in one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE comprising six RE groups (REGs), each REG comprising 12 consecutive REs in an OFDM symbol of an RB. The PDCCH within a BWP may be referred to as a control resource set (CORESET). The UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., common search space, UE-specific search space) during a PDCCH monitoring opportunity on the CORESET, where the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at larger or lower frequencies across the channel bandwidth. The primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of the frame. The PSS is used by the UE 104 to determine subframe / symbol timing and physical layer identification. The secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of the frame. The SSS is used by the UE to determine the physical layer cell identity group number and the radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the position of the aforementioned DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also referred to as an SS block (SSB)). The MIB provides the number of RBs in the system bandwidth and the system frame number (SFN). The PDSCH carries user data, broadcast system information not sent via the PBCH (such as the system information block (SIB)), and paging messages.

[0058] like Figure 2CAs shown, some of the REs carry DM-RS for channel estimation at the base station (which is indicated as R for a specific configuration, but other DMRS configurations are possible). The UE can send DM-RS for PUCCH and DM-RS for the physical uplink shared channel (PUSCH). The PUSCH DM-RS can be sent in the first one or two symbols of the PUSCH. The PUCCH DM-RS can be sent in different configurations depending on whether a short PUCCH or a long PUCCH is sent and according to the specific PUCCH format used. The UE can send a sounding reference signal (SRS). The SRS can be sent in the last symbol of the subframe. The SRS can have a comb structure, and the UE can send the SRS on one of the combs. The SRS can be used by the base station for channel quality estimation to achieve frequency-dependent scheduling on the UL.

[0059] Figure 2D Examples of various UL channels within a subframe of a frame are shown. The PUCCH may be positioned as indicated in a configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), and hybrid automatic repeat request (HARQ) acknowledgement (ACK) or negative acknowledgement (NACK) feedback. The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), power headroom report (PHR), or UCI.

[0060] Figure 33 is a block diagram of a base station 310 communicating with a UE 350 in an access network. In the DL, IP packets from the EPC 160 may be provided to the controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functions. Layer 3 includes the radio resource control (RRC) layer, and layer 2 includes the service data adaptation protocol (SDAP) layer, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, and the medium access control (MAC) layer. The controller / processor 375 provides: RRC layer functions associated with broadcasting system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functions associated with header compression / decompression, security (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; RLC layer functions associated with delivery of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs), resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), and MAC Demultiplexing of SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling and logical channel prioritization.

[0061] The transmit (TX) processor 316 and receive (RX) processor 370 implement layer 1 functions associated with various signal processing functions. Layer 1, including the physical (PHY) layer, may include error detection for the transport channel, forward error correction (FEC) encoding / decoding for the transport channel, interleaving, rate matching, mapping onto the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-order quadrature amplitude modulation (M-QAM)). The coded and modulated symbols can then be divided into parallel streams. Each stream can then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time or frequency domain, and then combined using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time-domain OFDM symbol stream. The OFDM stream is spatially precoded to generate multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine the coding and modulation schemes and for spatial processing. Channel estimates may be derived from a reference signal or channel condition feedback sent by the UE 350. Each spatial stream is then provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0062] At the UE 350, each receiver 354RX receives a signal via its corresponding antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functions associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, the RX processor 356 can combine them into a single OFDM symbol stream. The RX processor 356 then uses a fast Fourier transform (FFT) to convert the OFDM symbol stream from the time domain to the frequency domain. The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, as well as the reference signal, are recovered and demodulated by determining the most likely signal constellation point transmitted by the base station 310. These soft decisions can be based on channel estimates calculated by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent on the physical channel by base station 310. The data and control signals are then provided to controller / processor 359, which implements layer 3 and layer 2 functionality.

[0063] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using an ACK or NACK protocol to support HARQ operations.

[0064] Similar to the functions described in conjunction with DL transmissions performed by the base station 310, the controller / processor 359 provides: RRC layer functions associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functions associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functions associated with transmission of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0065] Channel estimates derived by a channel estimator 358 from a reference signal or feedback sent by the base station 310 may be used by a TX processor 368 to select an appropriate coding and modulation scheme, and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0066] At the base station 310, the UL transmission is processed in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318RX receives a signal through its respective antenna 320. Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to an RX processor 370.

[0067] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer-readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the UE 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for supporting HARQ operations using error detection using an ACK or NACK protocol.

[0068] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to combine Figure 1 The CSI report triggers component 198 to perform various aspects.

[0069] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to combine Figure 1 The CSI reporting component 199 performs various aspects.

[0070] In some wireless communication systems, a base station may use an UL grant to schedule a UE to send a CSI report on the PUSCH. The base station may also use a DL grant to trigger a CSI report on the PUCCH. Compared to CSI reporting on the PUSCH, CSI reporting on the PUCCH may enable faster CSI reporting, such as providing more recent CSI information to the base station, which in turn may improve PUSCH performance, such as through reduced latency or increased reliability. Figure 4 and Figure 5 An example of CSI triggered by DL grant on PUCCH is shown in accordance with various aspects of the present disclosure. Figure 4 As shown in example 400 of FIG, a base station may send a DL grant 402 associated with a PDSCH 404 to a UE. In response to receiving the DL grant 402 associated with the PDSCH 404, the UE may send a HARQ feedback message (such as a HARQ-ACK) in a PUCCH resource 406. Alternatively, as in Figure 5 As shown in example 500 in FIG, a base station may send a DL grant 502 associated with a PDSCH 504 to a UE. In response to receiving the DL grant 502, the UE may send a HARQ feedback message (such as a HARQ-ACK) and CSI in the same PUCCH resource 506. The HARQ feedback message and associated CSI sent in the same PUCCH resource 506 may be referred to as a "soft HARQ feedback message."

[0071] For DL ​​SPS (which may also be referred to as grant-free scheduling), there may not be a DL grant. Because there may not be a DL grant, the base station may not be able to use the DL grant to trigger the CSI report together with the HARQ feedback. This document provides a mechanism for triggering the CSI report together with the HARQ feedback for DL ​​SPS. In some aspects, the UE may receive a trigger for sending a CSI report associated with a DL SPS transmission in the PDSCH, and may send the CSI report based on the received trigger. The trigger may be a DM-RS or DCI. By utilizing such a mechanism for DL ​​SPS, more recent CSI information may be provided to the base station, which in turn may improve the PUSCH and overall communication quality between the UE and the base station.

[0072] As in Figure 6 As shown in example 600 of FIG, a base station may periodically send DL SPS transmissions 602A, 602B, 602C, 602D, ..., 602N, and 602O to a UE. The period of the DL SPS transmissions may be sent to the UE in an RRC transmission and configured for the UE. The base station may send DCI to trigger a CSI report for the UE. In some aspects, the DCI itself may be a trigger. In some aspects, the DCI may include a trigger. For example, after the UE receives DCI 604A that triggers a CSI report along with a HARQ feedback message (which may be referred to as a soft HARQ feedback message), the UE may send a CSI report for the next DL SPS transmission 602B on a PUCCH resource 606B. Similarly, after the UE receives DCI 604D that triggers a CSI report along with a HARQ feedback message (e.g., a soft HARQ feedback message), the UE may send a CSI report for the next DL SPS transmission 602N on a PUCCH resource 606N. In the absence of DCI triggering CSI reporting, the UE may transmit HARQ feedback messages in PUCCH resources 606A, 606C, 606D, and 606O without CSI reporting upon receiving DL SPS transmissions 602A, 602C, 602D, and 602O. The CSI report may include channel quality information (CQI), modulation and coding scheme (MCS), block error rate (BLER), bit error rate (BER) or suboptimal redundancy version (RV), channel rank, or average received power. In some aspects, the CSI report may be generated based on one or more of DM-RS or PDSCH. In some aspects, the trigger may trigger CSI reporting regardless of whether a HARQ feedback message is to be sent.

[0073] In some aspects, the trigger may be a DM-RS instead of a DCI. Figure 7As shown in example 700 of FIG, a base station may periodically send DL SPS transmissions 702A, 702B, 702C, 702D, ..., 702N, and 702O to a UE. The base station may send a triggering DM-RS to trigger a CSI report for the UE. In some aspects, the triggering DM-RS may be a DM-RS having a different sequence than other nominal DM-RSs, such as a DM-RS having a sign flipped for even or odd numbered elements, where the sign of the even or odd numbered elements is flipped. The base station may include the triggering DMRS in the DL SPS transmission to trigger a CSI report for the UE. For example, after the UE receives the triggering DM-RS that triggers a CSI report along with a HARQ feedback message (e.g., a soft HARQ feedback message) in the DL SPS transmission 602B, the UE may send a CSI report associated with the DL SPS transmission 702B on PUCCH resources 706B. Similarly, after the UE receives a triggering DM-RS in DL SPS transmission 702N that triggers a CSI report along with a HARQ feedback message (e.g., a soft HARQ feedback message), the UE may send a CSI report associated with DL SPS transmission 702B on PUCCH resource 706N. In the absence of a triggering DM-RS that triggers a CSI report, the UE may send an HARQ feedback message without a CSI report in PUCCH resources 706A, 706C, 706D, and 706O upon receiving DL SPS transmissions 702A, 702C, 702D, and 702O. DL SPS transmissions 702A, 702C, 702D, and 702O may each include a DM-RS that is not a triggering DM-RS.

[0074] In some aspects, as shown in examples 600 and 700, the trigger may trigger CSI reporting for one DL SPS transmission for the UE. In some aspects, the trigger may trigger CSI reporting for a configured number of DL SPS transmissions for the UE. Figure 8 As shown in example 800 of FIG, a base station may periodically send DL SPS transmissions 802A, 802B, 802C, 802D, ..., 802N, and 802O to a UE. The base station may send DCI to trigger CSI reporting for a configured number (e.g., 2) of DL SPS transmissions to the UE. The configured number may be configured via radio resource control (RRC) signaling, a medium access control (MAC) control element (MAC-CE), or DCI.

[0075] After the UE receives DCI 804A triggering CSI reporting, the UE may send CSI reports for the next two DL SPS transmissions 802B and 802C on PUCCH resources 806B and 806C. Similarly, after the UE receives DCI 804D triggering CSI reporting along with a HARQ feedback message (e.g., a soft HARQ feedback message), the UE may send CSI reports for the next two DL SPS transmissions 802N and 802O on PUCCH resources 806N and 806O. In the absence of DCI triggering CSI reporting, the UE may send HARQ feedback messages without CSI reports in PUCCH resources 806A, 806D, and 806O upon receiving DL SPS transmissions 802A, 802D, and 802O. In some aspects, the trigger may trigger CSI reporting without HARQ feedback messages. For example, the scheduled DL SPS transmission 802O may be a null DL SPS transmission, where the base station decides not to send data in the DL SPS transmission 802O. Because the UE receives the triggering DCI 804D that triggers the CSI report for the DL SPS transmission 802O, the UE may send the CSI report on the PUCCH 806O without sending the HARQ feedback message on the PUCCH 806O.

[0076] Figure 9 9 shows an example communication flow 900 between a base station 904 and a UE 902. Figure 9As shown, UE 902 and base station 904 may establish an RRC connection 906. Base station 904 may configure UE 902 with a periodicity for DL ​​SPS transmission via RRC connection 906. After RRC connection 906, base station 904 may begin periodically sending DL SPS transmissions 910A, 910B, etc. to UE 902 according to a configured period 908. Upon detecting a triggering DCI 912 associated with DL SPS transmission 910A or detecting a triggering DM-RS included in DL SPS transmission 910A, UE 902 may generate a CSI report and send the CSI report and a HARQ feedback message on PUCCH 914A. In some aspects, DL SPS transmission 910B may not be associated with a trigger (e.g., DCI or triggering DM-RS). UE 902 may send a HARQ feedback message on PUCCH without CSI report 914B upon receiving DL SPS transmission 910B. In some aspects, if the triggering DCI 912 is received Z symbols, slots, or mini-slots prior to the PUCCH resource (PUCCH 914A) scheduled to transmit HARQ-ACK / CSI feedback for the PDSCH opportunity in the DL SPS transmission 910A, then the triggering DCI 912 may trigger a soft report (CSI report and HARQ feedback message on PUCCH 914A). Z may be a positive integer.

[0077] Figure 10 1000 is a flow chart of a method for wireless communication at a UE supporting DCI or DM-RS triggered CSI reporting according to various aspects of the present disclosure. The method may be performed by a UE such as UE 104, UE 902, apparatus 1402, or the like.

[0078] At 1002, a UE may receive trigger information from a base station, the trigger information being associated with sending one or more CSI reports associated with one or more DL SPS transmissions in a PDSCH opportunity. In some aspects, the receiving at 1002 may be performed by Figure 14 In some aspects, the trigger information may correspond to Figure 6 DCI 604A / 604D, Figure 7 DM-RS in DL SPS 702B / 702N, Figure 8 DCI 804A / 804D, Figure 9 In some aspects, one or more DL SPS transmissions correspond to Figure 6 DL SPS transmission 602B / 602N, Figure 7DL SPS transmission 702B / 702N, Figure 8 DL SPS 802B / 802C / 802N / 802O, DL SPS transmission 910A, etc. In some aspects, the first PDSCH opportunity may correspond to Figure 6 DL SPS transmission 602B / 602N, Figure 7 DL SPS transmission 702B / 702N, Figure 8 In some aspects, the UE may receive a second DL SPS transmission in a second PDSCH opportunity that is not associated with the triggering information. For example, the second DL SPS transmission may correspond to Figure 6 DL SPS transmission 602A / 602C / 602D / 602O, Figure 7 DL SPS transmission 702A / 702C / 702D / 702O, Figure 8 DL SPS transmission 802A / 802D, Figure 9 DL SPS transmission 910B, etc.

[0079] In some aspects, the first PDSCH opportunity includes a first DM-RS, and receiving the triggering information may include receiving the first DM-RS. The first DM-RS may trigger the UE to send a CSI report. For example, Figure 7 The DL SPS transmissions 702B and 702N in may correspond to a first PDSCH opportunity including a DM-RS. In some aspects, the first DM-RS is a first type of DM-RS, and the second PDSCH opportunity includes a second DM-RS that is a second type of DM-RS different from the first type of DM-RS. For example, Figure 7The triggering DM-RS in DL SPS transmissions 702B and 702N may correspond to a first DM-RS, and the DM-RS in DL SPS transmission 702A may correspond to a second DM-RS. In some aspects, the first type of DM-RS corresponds to a first DM-RS sequence, and the second type of DM-RS corresponds to a second DM-RS sequence that is different from the first DM-RS sequence. In some aspects, each of the even-numbered elements in the first DM-RS sequence has an opposite sign relative to a corresponding even-numbered element in the second DM-RS sequence, or each of the odd-numbered elements in the first DM-RS sequence has an opposite sign relative to a corresponding odd-numbered element in the second DM-RS sequence. In some aspects, the first type of DM-RS corresponds to a first DM-RS sequence, and the second type of DM-RS corresponds to a second DM-RS sequence, the first DM-RS sequence being different from the second DM-RS sequence. In some aspects, the first type of DM-RS may correspond to a first DM-RS pattern or a first DM-RS configuration, and the second type of DM-RS corresponds to a second DM-RS pattern or a second DM-RS configuration. The first DM-RS pattern or the first DM-RS configuration may be different from the second DM-RS pattern or the second DM-RS configuration. The first DM-RS configuration and the second DM-RS configuration may correspond to at least one of a DM-RS position, a DM-RS allocation in a time or frequency resource, a DM-RS scrambling ID, or a number of DM-RS symbols.

[0080] In some aspects, the first PDSCH opportunity is associated with a DCI. Receiving the triggering information may include receiving the DCI. The DCI may trigger the UE to send the first CSI report or may include the trigger. For example, the first PDSCH opportunity may correspond to Figure 6 DL SPS transmission 602B / 602N in, and DCI may correspond to Figure 6 In some aspects, the triggering information activates the UE to send a first CSI report for a PDSCH opportunity following the received PDSCH. In some aspects, the triggering information activates the UE to send a CSI report for each of X received PDSCH opportunities, including the first PDSCH opportunity, where X ≥ 1 and is configured via RRC, MAC-CE, or DCI.

[0081] At 1004, the UE may receive a first DL SPS transmission of one or more DL SPS transmissions in a first PDSCH opportunity of one or more PDSCH opportunities. In some aspects, the reception at 1004 may be performed by Figure 14In some aspects, the first DL SPS transmission may be received. In some aspects, the first DL SPS transmission may not be received. For example, as in Figure 8 As shown in DL SPS transmission 802O in FIG. 8 , the DL SPS transmission may be empty and not received by the UE.

[0082] At 1006, the UE may send a first CSI report associated with the first DL SPS transmission based on receiving the triggering information. In some aspects, sending 1006 may be performed by Figure 14 1446. In some aspects, the UE may generate a CSI report based on one or more of the PDSCH or DM-RS. In some aspects, the CSI report includes one or more of CQI, MCS, BLER, BER, suboptimal RV, channel rank, or average received power. In some aspects, the CSI report may include an incremental MCS (delta MCS) or a reference MCS. The incremental MCS may be the measured MCS minus the scheduled MCS (e.g., the MCS for PDSCH opportunity transmission). The reference MCS may be the scheduled MCS. In some aspects, the UE may also send a first HARQ feedback message including an ACK or NACK based on receiving a first DL SPS transmission. The first CSI report and the HARQ feedback message may be sent in the same PUCCH. The HARQ feedback message based on receiving the first DL SPS transmission may correspond to Figure 6 HARQ feedback message and CSI report in HARQ on PUCCH 606B / 606N, Figure 7 HARQ message feedback and CSI reporting in HARQ on PUCCH 706B / 706N, Figure 8 HARQ feedback message and CSI report in HARQ on PUCCH 806B / 806C / 806N, Figure 9 In some aspects, the UE may also receive and send a second DL SPS transmission not associated with the triggering information in a second PDSCH opportunity. The UE may also send a second HARQ feedback message based on receiving the second DL SPS transmission, and not send a CSI report associated with the second DL SPS transmission based on the triggering information not being associated with the second DL SPS transmission in the second PDSCH opportunity. The second HARQ feedback message without the CSI report may correspond to Figure 6 HARQ feedback message in 606A / 606C / 606D / 606O, Figure 7HARQ feedback message in 706A / 706C / 706D / 706O, Figure 8 HARQ feedback message in 806A / 806C / 806D / 806O, Figure 9 HARQ feedback message in 914B, etc.

[0083] Figure 11 1100 is a flow chart of a method for wireless communication at a UE supporting DCI or DM-RS triggered CSI reporting according to various aspects of the present disclosure. The method may be performed by a UE such as UE 104, UE 902, apparatus 1402, or the like.

[0084] At 1102, the UE may receive trigger information from a base station, the trigger information associated with sending one or more CSI reports associated with one or more DL SPS transmissions in a PDSCH opportunity. In some aspects, the receiving at 1102 may be performed by Figure 14 In some aspects, the trigger information may correspond to Figure 6 DCI 604A / 604D, Figure 7 DM-RS in DL SPS 702B / 702N, Figure 8 DCI 804A / 804D, Figure 9 In some aspects, one or more DL SPS transmissions correspond to Figure 6 DL SPS transmission 602B / 602N, Figure 7 DL SPS transmission 702B / 702N, Figure 8 DL SPS 802B / 802C / 802N / 802O, DL SPS transmission 910A, etc. In some aspects, the first PDSCH opportunity may correspond to Figure 6 DL SPS transmission 602B / 602N, Figure 7 DL SPS transmission 702B / 702N, Figure 8 In some aspects, the UE may receive a second DL SPS transmission in a second PDSCH opportunity that is not associated with the triggering information. For example, the second DL SPS transmission may correspond to Figure 6 DL SPS transmission 602A / 602C / 602D / 602O, Figure 7 DL SPS transmission 702A / 702C / 702D / 702O, Figure 8 DL SPS transmission 802A / 802D, Figure 9 DL SPS transmission 910B, etc.

[0085] In some aspects, the first PDSCH opportunity includes a first DM-RS, and receiving the triggering information may include receiving the first DM-RS. The first DM-RS may trigger the UE to send a CSI report. For example, Figure 7 The DL SPS transmissions 702B and 702N in may correspond to a first PDSCH opportunity including a DM-RS. In some aspects, the first DM-RS is a first type of DM-RS, and the second PDSCH opportunity includes a second DM-RS that is a second type of DM-RS different from the first type of DM-RS. For example, Figure 7 The triggering DM-RS in DL SPS transmissions 702B and 702N may correspond to a first DM-RS, and the DM-RS in DL SPS transmission 702A may correspond to a second DM-RS. In some aspects, the first type of DM-RS corresponds to a first DM-RS sequence, and the second type of DM-RS corresponds to a second DM-RS sequence that is different from the first DM-RS sequence. In some aspects, each of the even-numbered elements in the first DM-RS sequence has an opposite sign relative to a corresponding even-numbered element in the second DM-RS sequence, or each of the odd-numbered elements in the first DM-RS sequence has an opposite sign relative to a corresponding odd-numbered element in the second DM-RS sequence. In some aspects, the first type of DM-RS corresponds to a first DM-RS sequence, and the second type of DM-RS corresponds to a second DM-RS sequence, the first DM-RS sequence being different from the second DM-RS sequence. In some aspects, the first type of DM-RS may correspond to a first DM-RS pattern or a first DM-RS configuration, and the second type of DM-RS corresponds to a second DM-RS pattern or a second DM-RS configuration. The first DM-RS pattern or the first DM-RS configuration may be different from the second DM-RS pattern or the second DM-RS configuration. The first DM-RS configuration and the second DM-RS configuration may correspond to at least one of a DM-RS position, a DM-RS allocation in a time or frequency resource, a DM-RS scrambling ID, or a number of DM-RS symbols.

[0086] In some aspects, the first PDSCH opportunity is associated with a DCI. Receiving the triggering information may include receiving the DCI. The DCI may trigger the UE to send a CSI report or may include a trigger. For example, the first PDSCH opportunity may correspond to Figure 6 DL SPS transmission 602B / 602N in, and DCI may correspond to Figure 6In some aspects, the triggering information activates the UE to send a first CSI report for a PDSCH opportunity following the received PDSCH. In some aspects, the triggering information activates the UE to send a CSI report for each of X received PDSCH opportunities, including the first PDSCH opportunity, where X ≥ 1 and is configured via RRC, MAC-CE, or DCI.

[0087] At 1104, the UE may receive a first DL SPS transmission of one or more DL SPS transmissions in a first PDSCH opportunity of one or more PDSCH opportunities. In some aspects, the reception at 1104 may be performed by Figure 14 In some aspects, the first DL SPS transmission may be received. In some aspects, the first DL SPS transmission may not be received. For example, as in Figure 8 As shown in DL SPS transmission 802O in FIG. 8 , the DL SPS transmission may be empty and not received by the UE.

[0088] At 1106, the UE may transmit a first CSI report associated with the first DL SPS transmission based on receiving the triggering information. In some aspects, the transmitting 1106 may be performed by Figure 14 1446. In some aspects, as part of 1106, the UE may generate a CSI report based on one or more of the PDSCH or DM-RS. In some aspects, the CSI report includes one or more of CQI, MCS, BLER, BER, suboptimal RV, channel rank, or average received power. In some aspects, the CSI report may include incremental MCS or reference MCS. The incremental MCS may be the measured MCS minus the scheduled MCS (e.g., the MCS for PDSCH opportunity transmission). The reference MCS may be the scheduled MCS. In some aspects, at 1108, the UE may also send a first HARQ feedback message including an ACK or NACK based on receiving the first DL SPS transmission. The first CSI report and the HARQ feedback message may be sent in the same PUCCH. In some aspects, the transmission at 1108 may be performed by Figure 14 The HARQ feedback message based on receiving the first DL SPS transmission may correspond to Figure 6 HARQ feedback message and CSI report in HARQ on PUCCH 606B / 606N, Figure 7 HARQ message feedback and CSI reporting in HARQ on PUCCH 706B / 706N, Figure 8HARQ feedback message and CSI report in HARQ on PUCCH 806B / 806C / 806N, Figure 9 In some aspects, at 1110, the UE may also receive and transmit a second DL SPS transmission not associated with the triggering information in a second PDSCH opportunity. In some aspects, the receiving at 1110 may be performed by the SPS component 1444. In some aspects, at 1112, the UE may also send a second HARQ feedback message based on receiving the second DL SPS transmission, and not send a CSI report associated with the second DL SPS transmission based on the triggering information not being associated with the second DL SPS transmission in the second PDSCH opportunity. In some aspects, the transmitting at 1112 may be performed by Figure 14 The second HARQ feedback message without CSI report may correspond to Figure 6 HARQ feedback message in 606A / 606C / 606D / 606O, Figure 7 HARQ feedback message in 706A / 706C / 706D / 706O, Figure 8 HARQ feedback message in 806A / 806C / 806D / 806O, Figure 9 HARQ feedback message in 914B, etc.

[0089] Figure 12 is a flow chart 1200 of a method of wireless communication at a base station supporting use of DCI or DM-RS to trigger CSI reporting in accordance with various aspects of the present disclosure.

[0090] At 1202, a base station may transmit trigger information to a UE, the trigger information being associated with one or more CSI reports associated with one or more DL SPS transmissions in one or more PDSCH opportunities including a first PDSCH opportunity. In some aspects, the transmission at 1202 may be performed by Figure 15 In some aspects, the trigger information may correspond to Figure 6 DCI 604A / 604D, Figure 7 DM-RS in DL SPS 702B / 702N, Figure 8 DCI804A / 804D, Figure 9 In some aspects, one or more DL SPS transmissions may correspond to Figure 6 DLSPS transmission 602B / 602N, Figure 7 DL SPS transmission 702B / 702N, Figure 8 DL SPS 802B / 802C / 802N / 802O, DL SPS transmission 910A, etc. In some aspects, the first PDSCH opportunity may correspond to Figure 6 DL SPS transmission 602B / 602N, Figure 7 DLSPS transmission 702B / 702N, Figure 8 In some aspects, the UE may receive a second PDSCH opportunity that is not associated with the trigger. For example, the second PDSCH opportunity may correspond to Figure 6 DL SPS transmission 602A / 602C / 602D / 602O, Figure 7 DL SPS transmission 702A / 702C / 702D / 702O, Figure 8 DL SPS transmission 802A / 802D, Figure 9 DL SPS transmission 910B, etc.

[0091] In some aspects, the first PDSCH opportunity includes a DM-RS, and sending the triggering information may include sending the DM-RS. The DM-RS may trigger the UE to send a CSI report. For example, Figure 7 The DL SPS transmissions 702B and 702N in may correspond to a first PDSCH opportunity including a DM-RS. In some aspects, the first DM-RS is a first type of DM-RS, and the second PDSCH opportunity includes a second DM-RS that is a second type of DM-RS different from the first type of DM-RS. For example, Figure 7The triggering DM-RS in DL SPS transmissions 702B and 702N may correspond to a first DM-RS, and the DM-RS in DL SPS transmissions 702A, etc. may correspond to a second DM-RS. In some aspects, the first type of DM-RS corresponds to a first DM-RS sequence, and the second type of DM-RS corresponds to a second DM-RS sequence that is different from the first DM-RS sequence. In some aspects, each of the even-numbered elements in the first DM-RS sequence has an opposite sign relative to the corresponding even-numbered element in the second DM-RS sequence, or each of the odd-numbered elements in the first DM-RS sequence has an opposite sign relative to the corresponding odd-numbered element in the second DM-RS sequence. In some aspects, the first type of DM-RS corresponds to a first DM-RS sequence, and the second type of DM-RS corresponds to a second DM-RS sequence, the first DM-RS sequence being different from the second DM-RS sequence. In some aspects, the first type of DM-RS may correspond to a first DM-RS pattern or a first DM-RS configuration, and the second type of DM-RS corresponds to a second DM-RS pattern or a second DM-RS configuration. The first DM-RS pattern or the first DM-RS configuration may be different from the second DM-RS pattern or the second DM-RS configuration. The first DM-RS configuration and the second DM-RS configuration may correspond to at least one of a DM-RS position, a DM-RS allocation in a time or frequency resource, a DM-RS ID, or a number of DM-RS symbols.

[0092] In some aspects, the first PDSCH opportunity is associated with a DCI. Sending the trigger information may include sending the DCI. The DCI may trigger the UE to send the first CSI report or may include a trigger. For example, the first PDSCH opportunity may correspond to Figure 6 DL SPS transmission 602B / 602N in, and DCI may correspond to Figure 6DCI 604A / 604D in. In some aspects, the trigger information is associated with an instruction to send a CSI report for a PDSCH opportunity following the received PDSCH. In some aspects, the trigger information is associated with an instruction to send a CSI report for each of X received PDSCH opportunities including a first PDSCH opportunity, where X ≥ 1 and is configured via RRC, MAC-CE, or DCI. At 1004, the UE may send a CSI report based on the received trigger. In some aspects, the CSI report may be based on one or more of PDSCH or DM-RS. In some aspects, the CSI report includes one or more of CQI, MCS, BLER, BER, suboptimal RV, channel rank, or average received power. In some aspects, the base station may receive a HARQ feedback message including an ACK or NACK for the first PDSCH opportunity. The first HARQ feedback message for the first PDSCH opportunity may correspond to Figure 6 HARQ feedback message and CSI report in HARQ on PUCCH 606B / 606N, Figure 7 HARQ feedback message and CSI report in HARQ on PUCCH706B / 706N, Figure 8 HARQ feedback message and CSI report in HARQ on PUCCH 806B / 806C / 806N, Figure 9 In some aspects, the base station may also receive a second HARQ feedback message for a second PDSCH opportunity based on a second DL SPS transmission without a CSI report. The second HARQ feedback message without a CSI report may correspond to Figure 6 HARQ feedback message in 606A / 606C / 606D / 606O, Figure 7 HARQ feedback message in 706A / 706C / 706D / 706O, Figure 8 HARQ feedback message in 806A / 806C / 806D / 806O, Figure 9 HARQ feedback message in 914B, etc.

[0093] At 1204, the base station may receive a first CSI report from the UE in the PUCCH based on the triggering information. In some aspects, the CSI report may be based on one or more of the PDSCH or the DM-RS. In some aspects, the reception at 1204 may be performed by Figure 151546. In some aspects, the CSI report includes one or more of CQI, MCS, BLER, BER, suboptimal RV, channel rank, or average received power. In some aspects, the CSI report may include incremental MCS or reference MCS. The incremental MCS may be the measured MCS minus the scheduled MCS (e.g., the MCS for PDSCH opportunity transmission). The reference MCS may be the scheduled MCS. In some aspects, the base station may also receive a HARQ feedback message including an ACK or NACK. The HARQ feedback message based on receiving the first PDSCH opportunity may correspond to Figure 6 HARQ message feedback and CSI reporting in HARQ on PUCCH 606B / 606N, Figure 7 HARQ message feedback and CSI reporting in HARQ on PUCCH 706B / 706N, Figure 8 HARQ feedback message and CSI report in HARQ on PUCCH 806B / 806C / 806N, Figure 9 In some aspects, the base station may also receive a second HARQ feedback message without a CSI report based on the second DL SPS transmission. The second HARQ feedback message without a CSI report may correspond to Figure 6 HARQ feedback message in 606A / 606C / 606D / 606O, Figure 7 HARQ feedback message in 706A / 706C / 706D / 706O, Figure 8 HARQ feedback message in 806A / 806C / 806D / 806O, Figure 9 HARQ feedback message in 914B, etc.

[0094] Figure 13 1300 is a flow chart of a method for wireless communication at a base station supporting use of DCI or DM-RS to trigger CSI reporting according to various aspects of the present disclosure. The method may be performed by a base station such as base station 102 / 180, base station 904, apparatus 1502, or the like.

[0095] At 1302, the base station may send trigger information to the UE, the trigger information being associated with one or more CSI reports associated with one or more DL SPS transmissions in one or more PDSCH opportunities including a first PDSCH opportunity. In some aspects, the sending at 1302 may be performed by Figure 15 The trigger component 1542 and Figure 15In some aspects, the trigger information may correspond to Figure 6 DCI 604A / 604D, Figure 7 DM-RS in DL SPS 702B / 702N, Figure 8 DCI 804A / 804D, Figure 9 In some aspects, one or more DL SPS transmissions may correspond to Figure 6 DL SPS transmission 602B / 602N, Figure 7 DL SPS transmission 702B / 702N, Figure 8 DL SPS 802B / 802C / 802N / 802O, DL SPS transmission 910A, etc. In some aspects, the first PDSCH opportunity may correspond to Figure 6 DL SPS transmission 602B / 602N, Figure 7 DL SPS transmission 702B / 702N, Figure 8 In some aspects, at 1308, the base station may also transmit a second DL SPS transmission not associated with the trigger in a second PDSCH opportunity. In some aspects, the transmission at 1308 may be performed by Figure 15 For example, the second PDSCH opportunity may correspond to Figure 6 DL SPS transmission 602A / 602C / 602D / 602O, Figure 7 DL SPS transmission 702A / 702C / 702D / 702O, Figure 8 DL SPS transmission 802A / 802D, Figure 9 DL SPS transmission 910B, etc.

[0096] In some aspects, the first PDSCH opportunity includes a DM-RS, and sending the triggering information may include sending the DM-RS. The DM-RS may trigger the UE to send a CSI report. For example, Figure 7 The DL SPS transmissions 702B and 702N in may correspond to a first PDSCH opportunity including a DM-RS. In some aspects, the first DM-RS is a first type of DM-RS, and the second PDSCH opportunity includes a second DM-RS that is a second type of DM-RS different from the first type of DM-RS. For example, Figure 7The triggering DM-RS in DL SPS transmissions 702B and 702N may correspond to a first DM-RS, and the DM-RS in DL SPS transmissions 702A, etc. may correspond to a second DM-RS. In some aspects, the first type of DM-RS corresponds to a first DM-RS sequence, and the second type of DM-RS corresponds to a second DM-RS sequence that is different from the first DM-RS sequence. In some aspects, each of the even-numbered elements in the first DM-RS sequence has an opposite sign relative to the corresponding even-numbered element in the second DM-RS sequence, or each of the odd-numbered elements in the first DM-RS sequence has an opposite sign relative to the corresponding odd-numbered element in the second DM-RS sequence. In some aspects, the first type of DM-RS corresponds to a first DM-RS sequence, and the second type of DM-RS corresponds to a second DM-RS sequence, the first DM-RS sequence being different from the second DM-RS sequence. In some aspects, the first type of DM-RS may correspond to a first DM-RS pattern or a first DM-RS configuration, and the second type of DM-RS corresponds to a second DM-RS pattern or a second DM-RS configuration. The first DM-RS pattern or the first DM-RS configuration may be different from the second DM-RS pattern or the second DM-RS configuration. The first DM-RS configuration and the second DM-RS configuration may correspond to at least one of a DM-RS position, a DM-RS allocation in a time or frequency resource, a DM-RS ID, or a number of DM-RS symbols.

[0097] In some aspects, the first PDSCH opportunity is associated with a DCI. Sending the trigger information may include sending the DCI. The DCI may trigger the UE to send the first CSI report or may include a trigger. For example, the first PDSCH opportunity may correspond to Figure 6 DL SPS transmission 602B / 602N in, and DCI may correspond to Figure 6604A / 604D in the DCI 604A / 604D. In some aspects, the trigger information is associated with an instruction to send a CSI report for a PDSCH opportunity following the received PDSCH. In some aspects, the trigger information is associated with an instruction to send a CSI report for each of X received PDSCH opportunities including a first PDSCH opportunity, where X ≥ 1 and is configured via RRC, MAC-CE, or DCI. At 1004, the UE may send a CSI report based on the received trigger. In some aspects, the CSI report may be based on one or more of PDSCH or DM-RS. In some aspects, the CSI report includes one or more of CQI, MCS, BLER, BER, suboptimal RV, channel rank, or average received power. In some aspects, at 1306, the base station may receive a HARQ feedback message including an ACK or NACK for the first PDSCH opportunity. In some aspects, the reception at 1306 may be performed by Figure 15 The first HARQ feedback message for the first PDSCH opportunity may correspond to Figure 6 HARQ feedback message and CSI report in HARQ on PUCCH 606B / 606N, Figure 7 HARQ feedback message and CSI report in HARQ on PUCCH706B / 706N, Figure 8 HARQ feedback message and CSI report in HARQ on PUCCH 806B / 806C / 806N, Figure 9 In some aspects, the base station may also receive a second HARQ feedback message for a second PDSCH opportunity based on a second DL SPS transmission without a CSI report. The second HARQ feedback message without a CSI report may correspond to Figure 6 HARQ feedback message in 606A / 606C / 606D / 606O, Figure 7 HARQ feedback message in 706A / 706C / 706D / 706O, Figure 8 HARQ feedback message in 806A / 806C / 806D / 806O, Figure 9 HARQ feedback message in 914B, etc.

[0098] At 1304, the base station may receive a first CSI report from the UE in the PUCCH based on the triggering information. In some aspects, the CSI report may be based on one or more of the PDSCH or the DM-RS. In some aspects, the reception at 1304 may be performed by Figure 15 1546. In some aspects, the CSI report includes one or more of CQI, MCS, BLER, BER, suboptimal RV, channel rank, or average received power. In some aspects, the CSI report may include incremental MCS or reference MCS. The incremental MCS may be the measured MCS minus the scheduled MCS (e.g., the MCS for PDSCH opportunity transmission). The reference MCS may be the scheduled MCS. In some aspects, the base station may also receive a HARQ feedback message including an ACK or NACK. The HARQ feedback message based on receiving the first PDSCH opportunity may correspond to Figure 6 HARQ message feedback and CSI reporting in HARQ on PUCCH 606B / 606N, Figure 7 HARQ message feedback and CSI reporting in HARQ on PUCCH 706B / 706N, Figure 8 HARQ feedback message and CSI report in HARQ on PUCCH 806B / 806C / 806N, Figure 9 In some aspects, the base station may also receive a second HARQ feedback message based on the second DL SPS transmission without a CSI report at 1312. In some aspects, the reception at 1312 may be performed by Figure 15 The second HARQ feedback message without CSI report may correspond to Figure 6 HARQ feedback message in 606A / 606C / 606D / 606O, Figure 7 HARQ feedback message in 706A / 706C / 706D / 706O, Figure 8 HARQ feedback message in 806A / 806C / 806D / 806O, Figure 9 HARQ feedback message in 914B, etc.

[0099] Figure 1414 is a schematic diagram 1400 illustrating an example of a hardware implementation for an apparatus 1402. Apparatus 1402 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, apparatus 1402 may include a cellular baseband processor 1404 (also referred to as a modem) coupled to a cellular RF transceiver 1422. In some aspects, apparatus 1402 may also include one or more subscriber identity module (SIM) cards 1420, an application processor 1406 coupled to a secure digital (SD) card 1408 and a screen 1410, a Bluetooth module 1412, a wireless local area network (WLAN) module 1414, a global positioning system (GPS) module 1416, or a power supply 1418. Cellular baseband processor 1404 communicates with UE 104 or BS 102 / 180 via cellular RF transceiver 1422. Cellular baseband processor 1404 may include computer-readable media / memory. The computer-readable media / memory may be non-transitory. The cellular baseband processor 1404 is responsible for general processing, including executing software stored on a computer-readable medium / memory. When executed by the cellular baseband processor 1404, the software causes the cellular baseband processor 1404 to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the cellular baseband processor 1404 when executing the software. The cellular baseband processor 1404 also includes a receive component 1430, a communication manager 1432, and a transmit component 1434. The communication manager 1432 includes one or more of the components shown. The components within the communication manager 1432 may be stored in a computer-readable medium / memory or configured as hardware within the cellular baseband processor 1404. The cellular baseband processor 1404 may be a component of the UE 350 and may include at least one of the TX processor 368, the RX processor 356, and the controller / processor 359, or the memory 360. In one configuration, the apparatus 1402 may be a modem chip and include only the cellular baseband processor 1404, and in another configuration, the apparatus 1402 may be the entire UE (e.g., see Figure 3 350) and includes additional modules of device 1402.

[0100] The communication manager 1432 may include a trigger component 1442 configured to receive trigger information associated with sending one or more CSI reports associated with one or more DL SPS transmissions in one or more PDSCH opportunities, for example, as described in conjunction with Figure 11 1102 or Figure 12The communication manager 1432 may also include an SPS component 1444 configured to receive a first DL SPS transmission of one or more DL SPS transmissions in a first PDSCH opportunity in one or more PDSCH opportunities, or to receive a second DL SPS transmission not associated with the trigger information in a second PDSCH opportunity, for example, as described in conjunction with Figure 10 1004, Figure 11 1104 or Figure 11 The communication manager 1432 may also include a CSI component 1446, which may be configured to send a first CSI report associated with the first DL SPS transmission based on receiving the trigger information, for example, as described in conjunction with Figure 10 1006 or Figure 11 The communication manager 1432 may also include a HARQ component 1448, which may be configured to send a first HARQ feedback message including an ACK or NACK based on receiving the first DL SPS transmission, or send a second HARQ feedback message based on receiving the second DL SPS transmission without sending a CSI report, for example, as described in conjunction with Figure 11 1108 or Figure 11 As described in 1112.

[0101] The apparatus may include executing Figure 10 and 11 Each box in the flowchart of the algorithm has an additional component. Therefore, Figure 10 and 11 Each block in the flowchart of can be performed by a component, and the apparatus can include one or more of those components. The component can 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.

[0102] As shown, the apparatus 1402 may include various components configured for various functions. In one configuration, the apparatus 1402 (and specifically, the cellular baseband processor 1404) may include: means for receiving trigger information associated with sending one or more CSI reports associated with one or more DL SPS transmissions in one or more PDSCH opportunities. The cellular baseband processor 1404 may also include: means for receiving a first DL SPS transmission among the one or more DL SPS transmissions in a first PDSCH opportunity among the one or more PDSCH opportunities, or receiving a second DL SPS transmission not associated with the trigger information in a second PDSCH opportunity. The cellular baseband processor 1404 may also include: means for sending a first CSI report associated with the first DL SPS transmission based on receiving the trigger information. The cellular baseband processor 1404 may also include: means for sending a first HARQ feedback message including an ACK or NACK based on receiving the first DL SPS transmission. The cellular baseband processor 1404 may also include: means for sending a second HARQ feedback message without sending a CSI report. The cellular baseband processor 1404 may also include means for generating CSI reports based on one or more of the PDSCH or DM-RS. The means may be one or more of the components of the apparatus 1402 configured to perform the functions recited by the means. As described above, the apparatus 1402 may include the TX processor 368, the RX processor 356, and the controller / processor 359. Thus, in one configuration, the means may be the TX processor 368, the RX processor 356, and the controller / processor 359 configured to perform the functions recited by the means.

[0103] Figure 1515 is a schematic diagram 1500 illustrating an example hardware implementation for apparatus 1502. Apparatus 1502 may be a base station, a component of a base station, or may implement base station functionality. In some aspects, apparatus 1502 may include a baseband unit 1504. Baseband unit 1504 may communicate with UE 104 via a cellular RF transceiver 1522. Baseband unit 1504 may include computer-readable media / memory. Baseband unit 1504 is responsible for general processing, including executing software stored on the computer-readable media / memory. When executed by baseband unit 1504, the software enables baseband unit 1504 to perform the various functions described above. The computer-readable media / memory may also be used to store data manipulated by baseband unit 1504 when executing the software. Baseband unit 1504 also includes a receiving component 1530, a communication manager 1532, and a transmitting component 1534. Communication manager 1532 includes one or more of the components shown. The components within the communication manager 1532 may be stored in a computer-readable medium / memory or configured as hardware within the baseband unit 1504. The baseband unit 1504 may be a component of the base station 310 and may include at least one of the TX processor 316, the RX processor 370, and the controller / processor 375 or the memory 376.

[0104] The communication manager 1532 may include a component 1542 configured to send trigger information to the UE, the trigger information being associated with one or more CSI reports associated with DL SPS transmission in at least one PDSCH opportunity including the first PDSCH opportunity, e.g., as described in conjunction with Figure 13 1302 or Figure 12 The communication manager 1532 may also include an SPS component 1544, which may be configured to send a second DL SPS transmission not associated with the triggering information in a second PDSCH opportunity, for example, as described in conjunction with Figure 13 The communication manager 1532 may also include a CSI component 1546, which may be configured to receive a CSI report from the UE in at least one CSI resource in the PUCCH based on the trigger information, for example, as described in conjunction with Figure 13 The communication manager 1532 may also include a HARQ component 1548, which may be configured to receive a first HARQ feedback message including an ACK or NACK, and to receive a second HARQ feedback message based on a second DL SPS transmission without a CSI report, for example, as described in conjunction with Figure 13 As described in 1306 and 1312.

[0105] The apparatus may include executing Figure 12-13 Each box in the flowchart of the algorithm has an additional component. Therefore, Figure 12-13 Each block in the flowchart of can be performed by a component, and the apparatus can include one or more of those components. The component can 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.

[0106] As shown, the apparatus 1502 may include various components configured for various functions. In one configuration, the apparatus 1502 (and specifically, the baseband unit 1504) may include: a unit for sending trigger information to the UE, the trigger information being associated with one or more CSI reports associated with a DL SPS transmission in at least one PDSCH opportunity including a first PDSCH opportunity. The baseband unit 1504 may also include: a unit for sending a second DL SPS transmission not associated with the trigger information in a second PDSCH opportunity. The baseband unit 1504 may also include: a unit for receiving a CSI report from the UE in at least one CSI resource in the PUCCH based on the trigger information. The baseband unit 1504 may also include: a unit for receiving a first HARQ feedback message including an ACK or NACK, and a unit for receiving a second HARQ feedback message without a CSI report based on the second DL SPS transmission. The units may be one or more of the components of the apparatus 1502 configured to perform the functions recited by the units. As described above, the apparatus 1502 may include the TX processor 316, the RX processor 370, and the controller / processor 375. Thus, in one configuration, the described means may be the TX processor 316, the RX processor 370, and the controller / processor 375 configured to perform the functions recited by the described means.

[0107] The specific order or hierarchy of blocks in the disclosed processes / flowcharts is illustrative of example methods. The specific order or hierarchy of blocks in the disclosed processes / flowcharts may be rearranged based on design preferences. Additionally, some blocks may be combined or omitted. The accompanying method claims present elements of the various blocks in an example order and are not intended to be limited to the specific order or hierarchy presented.

[0108] The previous description is provided so that any person skilled in the art can practice the various aspects described herein. For those skilled in the art, various modifications to these aspects will be apparent, and the general principles defined herein can be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but to be given the full scope consistent with the text claims, wherein, unless explicitly stated otherwise, reference to an element in the singular is not intended to mean "one and only one", but to mean "one or more". Terms such as "if", "when ... " and "while ... " should be interpreted as "under the conditions of ... ", rather than meaning an immediate time relationship or reaction. That is, these phrases (for example, "when ... ") do not mean immediate action in response to the occurrence of an action or during the occurrence of an action, but only mean that if the condition is met, the action will occur, but does not require a specific or immediate time constraint for the occurrence of the action. The word "exemplary" is used herein to mean "used as an example, instance or illustration". Any aspect described as "exemplary" in this article is not necessarily interpreted as preferred or advantageous over other aspects. Unless otherwise explicitly 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, or C, and may include multiples of A, multiples of B, or multiples of C. Specifically, combinations such as “at least one of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B, and C,” “one or more of A, B, and C,” and “A, B, C, or any combination thereof” may be only A, only B, only C, A and B, A and C, B and C, or A, B, and C, where any such combination may include one or more or some of A, B, or C. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. The words “module,” “mechanism,” “element,” “device,” etc. may not be substitutes for the word “unit.” Therefore, no claim element should be interpreted as a functional module unless the element is explicitly recited using the phrase “a means for…”

[0109] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0110] Aspect 1 is a method for performing wireless communication at a UE, comprising: receiving trigger information, the trigger information being associated with sending one or more CSI reports associated with one or more DL SPS transmissions in one or more PDSCH opportunities; receiving a first DL SPS transmission among the one or more DL SPS transmissions in a first PDSCH opportunity among the one or more PDSCH opportunities; and sending a first CSI report associated with the first DL SPS transmission based on receiving the trigger information.

[0111] Aspect 2 is a method according to aspect 1, further comprising: sending a first HARQ feedback message including ACK or NACK based on the reception of the first DL SPS transmission, wherein the first CSI report and the HARQ feedback message are sent in the same PUCCH.

[0112] Aspect 3 is a method according to any one of Aspects 1-2, further including: receiving a second DL SPS transmission that is not associated with the trigger information in a second PDSCH opportunity; and sending a second HARQ feedback message based on receiving the second DL SPS transmission, and not sending a CSI report associated with the second DL SPS transmission based on the fact that the trigger information is not associated with the second DL SPS transmission in the second PDSCH opportunity.

[0113] Aspect 4 is a method according to any one of aspects 1-3, wherein the first PDSCH opportunity includes a first DM-RS, and wherein receiving the trigger information includes receiving the first DM-RS, and the first DM-RS triggers the UE to send the first CSI report.

[0114] Aspect 5 is a method according to any one of aspects 1-4, wherein the first DM-RS is a first type of DM-RS, and wherein the second PDSCH opportunity includes a second DM-RS, and the second DM-RS is a second type of DM-RS different from the first type of DM-RS.

[0115] Aspect 6 is a method according to any one of aspects 1-5, wherein the first type of DM-RS corresponds to a first DM-RS sequence, and the second type of DM-RS corresponds to a second DM-RS sequence different from the first DM-RS sequence.

[0116] Aspect 7 is a method according to any one of Aspects 1-6, wherein each of the even-numbered elements in the first DM-RS sequence has an opposite sign relative to the corresponding even-numbered elements in the second DM-RS sequence, and wherein each of the odd-numbered elements in the first DM-RS sequence has an opposite sign relative to the corresponding odd-numbered elements in the second DM-RS sequence.

[0117] Aspect 8 is a method according to any one of Aspects 1-7, wherein the first type of DM-RS corresponds to a first DM-RS pattern or a first DM-RS configuration, and the second type of DM-RS corresponds to a second DM-RS pattern or a second DM-RS configuration, and the second DM-RS pattern or the second DM-RS configuration is different from the first DM-RS pattern or the first DM-RS configuration, respectively, wherein the first DM-RS configuration and the second DM-RS configuration correspond to at least one of a DM-RS position, a DM-RS allocation in a time or frequency resource, a DM-RS scrambling ID, or the number of DM-RS symbols.

[0118] Aspect 9 is a method according to any one of aspects 1-8, wherein the first PDSCH opportunity is associated with DCI, and wherein receiving the triggering information includes receiving the DCI, and the DCI triggers the UE to send the first CSI report.

[0119] Aspect 10 is a method according to any one of aspects 1-9, wherein the triggering information activates the UE to send the first CSI report but not to send the second CSI report.

[0120] Aspect 11 is a method according to any one of aspects 1-10, wherein the trigger information activates the UE to send a CSI report for each of X received PDSCH opportunities including the first PDSCH opportunity, where X ≥ 1 and is configured via RRC signaling, MAC-CE or DCI.

[0121] Aspect 12 is a method according to any one of aspects 1-11, wherein the first CSI report includes one or more of the following: CQI, MCS, BLER, BER, suboptimal RV, channel rank or average received power.

[0122] Aspect 13 is a method for wireless communication in a base station, comprising: sending trigger information to a UE, wherein the trigger information is associated with one or more CSI reports associated with DL SPS transmission in one or more PDSCH opportunities including a first PDSCH opportunity; and receiving a first CSI report from the UE in a PUCCH based on the trigger information.

[0123] Aspect 14 is the method according to aspect 13, further comprising: receiving a first HARQ feedback message including ACK or NACK.

[0124] Aspect 15 is a method according to any one of aspects 13-14, further comprising: sending a second DL SPS transmission not associated with the triggering information in a second PDSCH opportunity; and receiving a second HARQ feedback message without the CSI report based on the second DL SPS transmission.

[0125] Aspect 16 is a method according to any one of aspects 13-15, wherein the first PDSCH opportunity includes a first DM-RS, and wherein sending the trigger information includes sending the first DM-RS, and the first DM-RS triggers the UE to send the first CSI report.

[0126] Aspect 17 is a method according to any one of aspects 13-16, wherein the first DM-RS is a first type of DM-RS, and wherein the second PDSCH opportunity includes a second DM-RS, and the second DM-RS is a second type of DM-RS different from the first type of DM-RS.

[0127] Aspect 18 is a method according to any one of Aspects 13-17, wherein each of the even-numbered elements in the first DM-RS sequence has an opposite sign relative to the corresponding even-numbered elements in the second DM-RS sequence, and wherein each of the odd-numbered elements in the first DM-RS sequence has an opposite sign relative to the corresponding odd-numbered elements in the second DM-RS sequence.

[0128] Aspect 19 is a method according to any one of Aspects 13-18, wherein the first type of DM-RS corresponds to a first DM-RS pattern or a first DM-RS configuration, and the second type of DM-RS corresponds to a second DM-RS pattern or a second DM-RS configuration, and the second DM-RS pattern or the second DM-RS configuration is different from the first DM-RS pattern or the first DM-RS configuration, respectively, wherein the first DM-RS configuration and the second DM-RS configuration correspond to at least one of a DM-RS position, a DM-RS allocation in a time or frequency resource, a DM-RS scrambling ID, or the number of DM-RS symbols.

[0129] Aspect 20 is a method according to any one of aspects 13-19, wherein the first PDSCH opportunity is associated with DCI, and wherein sending the triggering information includes sending the DCI.

[0130] Aspect 21 is a method according to any one of aspects 13-20, wherein the trigger information is associated with an instruction to send the first CSI report without sending the second CSI report.

[0131] Aspect 22 is a method according to any one of aspects 13-21, wherein the trigger information is associated with an instruction to send a CSI report for each of X PDSCH opportunities including the first PDSCH opportunity, where X≥1 and is configured via RRC signaling, MAC-CE or DCI.

[0132] Aspect 23 is a method according to any one of aspects 13-22, wherein the first CSI report includes one or more of the following: CQI, MCS, BLER, BER, or suboptimal RV, channel rank, or average received power.

[0133] Aspect 24 is an apparatus comprising: a memory; and at least one processor coupled to the memory and configured to perform any of aspects 1 to 12.

[0134] Aspect 25 is an apparatus for wireless communication, comprising: means for performing any of aspects 1 to 12.

[0135] Aspect 26 is a computer-readable medium storing computer-executable code, wherein the code, when executed by a processor, causes the processor to perform any of aspects 1 to 12.

[0136] Aspect 27 is an apparatus comprising: a memory; and at least one processor coupled to the memory and configured to perform any of aspects 13 to 23.

[0137] Aspect 28 is an apparatus for wireless communication, comprising: means for performing any of aspects 13 to 23.

[0138] Aspect 29 is a computer-readable medium storing computer-executable code, wherein the code, when executed by a processor, causes the processor to perform any of aspects 13 to 23.

Claims

1. A method for wireless communication at a user equipment (UE), the method comprising: receiving trigger information associated with sending one or more channel state information (CSI) reports associated with one or more downlink (DL) semi-persistent scheduling (SPS) transmissions in one or more physical downlink shared channel (PDSCH) opportunities; receiving a first DL SPS transmission of the one or more DL SPS transmissions in a first PDSCH opportunity of the one or more PDSCH opportunities; and Sending a first CSI report associated with the first DL SPS transmission based on receiving the trigger information, wherein the first PDSCH opportunity includes a first demodulation reference signal (DM-RS), and wherein receiving the trigger information includes receiving the first DM-RS, and the first DM-RS triggers the UE to send the first CSI report.

2. The method according to claim 1, further comprising: A first hybrid automatic repeat request (HARQ) feedback message including an acknowledgement (ACK) or a negative ACK (NACK) is sent based on the receipt of the first DL SPS transmission, wherein the first CSI report and the HARQ feedback message are sent in the same physical uplink control channel (PUCCH).

3. The method according to claim 2, further comprising: receiving a second DL SPS transmission not associated with the triggering information in a second PDSCH opportunity; as well as A second HARQ feedback message is sent based on receiving the second DL SPS transmission, and a CSI report associated with the second DL SPS transmission is not sent based on the triggering information not being associated with the second DL SPS transmission in the second PDSCH opportunity.

4. The method according to claim 3, wherein: The first DM-RS is a first type of DM-RS, and wherein the second PDSCH opportunity includes a second DM-RS, the second DM-RS being a second type of DM-RS different from the first type of DM-RS.

5. The method according to claim 4, wherein The first type of DM-RS corresponds to a first DM-RS sequence, and the second type of DM-RS corresponds to a second DM-RS sequence different from the first DM-RS sequence.

6. The method according to claim 5, wherein: Each of the even-numbered elements in the first DM-RS sequence has an opposite sign relative to the corresponding even-numbered elements in the second DM-RS sequence, wherein each of the odd-numbered elements in the first DM-RS sequence has an opposite sign relative to the corresponding odd-numbered elements in the second DM-RS sequence.

7. The method according to claim 5, wherein: The first type of DM-RS corresponds to a first DM-RS pattern or a first DM-RS configuration, and the second type of DM-RS corresponds to a second DM-RS pattern or a second DM-RS configuration, and the second DM-RS pattern or the second DM-RS configuration is different from the first DM-RS pattern or the first DM-RS configuration, respectively, wherein the first DM-RS configuration and the second DM-RS configuration correspond to at least one of a DM-RS position, a DM-RS allocation in a time or frequency resource, a DM-RS scrambling identifier (ID), or the number of DM-RS symbols.

8. The method according to claim 1, wherein The triggering information activates the UE to send the first CSI report but not to send the second CSI report.

9. The method according to claim 1, wherein The trigger information activates the UE to send a CSI report for each of X received PDSCH opportunities including the first PDSCH opportunity, where X≥1 and is configured via radio resource control (RRC) signaling, medium access control (MAC) control element (MAC-CE) or downlink control information (DCI).

10. The method according to claim 1, wherein The first CSI report includes one or more of the following: channel quality information (CQI), modulation and coding scheme (MCS), block error rate (BLER), bit error rate (BER), suboptimal redundancy version (RV), channel rank or average received power.

11. A method for wireless communication at a base station, the method comprising: sending trigger information to a user equipment (UE), the trigger information associated with one or more channel state information (CSI) reports associated with a downlink (DL) semi-persistent scheduling (SPS) transmission in one or more physical downlink shared channel (PDSCH) opportunities including a first PDSCH opportunity, wherein the first PDSCH opportunity includes a first demodulation reference signal (DM-RS), and wherein sending the trigger information includes sending the first DM-RS, the first DM-RS triggering the UE to send a first CSI report; and The first CSI report is received from the UE in a physical uplink control channel (PUCCH) based on the triggering information.

12. The method according to claim 11, further comprising: A first hybrid automatic repeat request (HARQ) feedback message including an acknowledgement (ACK) or a negative ACK (NACK) is received.

13. The method according to claim 12, further comprising: sending a second DL SPS transmission not associated with the triggering information in a second PDSCH opportunity; as well as A second HARQ feedback message is received based on the second DL SPS transmission without the CSI report.

14. The method according to claim 13, wherein The first DM-RS is a first type of DM-RS, and wherein the second PDSCH opportunity includes a second DM-RS, the second DM-RS being a second type of DM-RS different from the first type of DM-RS.

15. The method according to claim 14, wherein Each of the even-numbered elements in a first DM-RS sequence corresponding to the first type of DM-RS has an opposite sign relative to the corresponding even-numbered elements in a second DM-RS sequence corresponding to the second type of DM-RS, wherein each of the odd-numbered elements in the first DM-RS sequence has an opposite sign relative to the corresponding odd-numbered elements in the second DM-RS sequence.

16. The method according to claim 14, wherein The first type of DM-RS corresponds to a first DM-RS pattern or a first DM-RS configuration, and the second type of DM-RS corresponds to a second DM-RS pattern or a second DM-RS configuration, and the second DM-RS pattern or the second DM-RS configuration is different from the first DM-RS pattern or the first DM-RS configuration, respectively, wherein the first DM-RS configuration and the second DM-RS configuration correspond to at least one of a DM-RS position, a DM-RS allocation in a time or frequency resource, a DM-RS scrambling identifier (ID), or the number of DM-RS symbols.

17. The method according to claim 11, wherein The trigger information is associated with an instruction for sending the first CSI report but not sending the second CSI report.

18. The method according to claim 11, wherein The trigger information is associated with an instruction to send a CSI report for each of X PDSCH opportunities including the first PDSCH opportunity, where X ≥ 1 and is configured via radio resource control (RRC) signaling, a medium access control (MAC) control element (MAC-CE), or downlink control information (DCI).

19. The method according to claim 11, wherein The first CSI report includes one or more of the following: channel quality information (CQI), modulation and coding scheme (MCS), block error rate (BLER), bit error rate (BER), or suboptimal redundancy version (RV), channel rank or average received power.

20. 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: receiving trigger information associated with sending one or more channel state information (CSI) reports associated with one or more downlink (DL) semi-persistent scheduling (SPS) transmissions in one or more physical downlink shared channel (PDSCH) opportunities; receiving a first DL SPS transmission of the one or more DL SPS transmissions in a first PDSCH opportunity of the one or more PDSCH opportunities; and Sending a first CSI report associated with the first DL SPS transmission based on receiving the trigger information, wherein the first PDSCH opportunity includes a first demodulation reference signal (DM-RS), and wherein receiving the trigger information includes receiving the first DM-RS, and the first DM-RS triggers the UE to send the first CSI report.

21. The apparatus according to claim 20, further comprising: A transceiver coupled to the at least one processor.

22. The device according to claim 20, wherein The triggering information activates the UE to send the first CSI report but not to send the second CSI report.

23. The apparatus according to claim 20, wherein The trigger information activates the UE to send a CSI report for each of X received PDSCH opportunities including the first PDSCH opportunity, where X≥1 and is configured via radio resource control (RRC) signaling, medium access control (MAC) control element (MAC-CE) or downlink control information (DCI).

24. The apparatus according to claim 20, wherein The first CSI report includes one or more of the following: channel quality information (CQI), modulation and coding scheme (MCS), block error rate (BLER), bit error rate (BER), suboptimal redundancy version (RV), channel rank or average received power.

25. 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: sending trigger information to a user equipment (UE), the trigger information associated with a channel state information (CSI) report associated with a downlink (DL) semi-persistent scheduling (SPS) transmission in one or more physical downlink shared channel (PDSCH) opportunities including a first PDSCH opportunity, wherein the first PDSCH opportunity includes a first demodulation reference signal (DM-RS), and wherein sending the trigger information includes sending the first DM-RS, the first DM-RS triggering the UE to send a first CSI report; and The first CSI report is received from the UE in a physical uplink control channel (PUCCH) based on the triggering information.

26. The apparatus according to claim 25, further comprising: A transceiver coupled to the at least one processor.

Images