Method and apparatus for csi reference resources and reporting windows

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A user equipment (UE) in a wireless communication system is provided. In one embodiment, a UE includes a transceiver and a controller coupled with the transceiver and configured to receive configuration information associated with a channel state information (CSI) report from a base station, where the CSI report includes information about a set of slots of the CSI report and a channel quality indicator (CQI), at least one CQI corresponding to at least one slot identified from the slot set of the CSI report is determined, and the CSI report including information on the determined at least one CQI is transmitted to the base station.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communication systems, and more particularly to a method and apparatus for channel state information (CSI) reference resources and reporting windows. Background Art

[0002] 5G mobile communication technology defines a wide frequency band, making high transmission rates and new services possible, and can be implemented not only in "below 6 GHz" frequency bands such as 3.5 GHz, but also in "above 6 GHz" frequency bands (including 28 GHz and 39 GHz) called millimeter waves. In addition, 6G mobile communication technology (called super 5G system) has been considered to be implemented in terahertz frequency bands (such as 95 GHz to 3 THz bands) in order to achieve a transmission rate fifty times faster than 5G mobile communication technology and ultra-low latency that is one-tenth of 5G mobile communication technology.

[0003] At the beginning of the development of 5G mobile communication technology, in order to support services and meet the performance requirements related to enhanced mobile broadband (eMBB), ultra-reliable and low-latency communications (URLLC) and massive machine type communications (mMTC), standardization has been carried out on the following technologies: beamforming and massive MIMO for alleviating radio wave path loss in millimeter waves and increasing radio wave transmission distance; support parameter sets (e.g., operating multiple subcarrier spacings) for efficient utilization of millimeter wave resources and dynamic operation of time slot formats; initial access technology for supporting multi-beam transmission and broadband; definition and operation of bandwidth parts (BWP); new channel coding methods (such as low-density parity-check (LDPC) codes for large amounts of data transmission and polarization codes for high-reliability transmission of control information); L2 preprocessing; and network slicing for providing dedicated networks dedicated to specific services.

[0004] Currently, in view of the services supported by 5G mobile communication technology, discussions are underway on improvements and performance enhancements of initial 5G mobile communication technology, and there is physical layer standardization on technologies such as: Vehicle-to-Everything (V2X) for assisting driving decisions of autonomous vehicles based on information about the location and status of the vehicle transmitted by the vehicle and for improving user convenience, New Radio Unlicensed (NR-U) for system operation designed to comply with various regulatory requirements in unlicensed bands, NR UE energy saving, Non-Terrestrial Network (NTN) as UE-satellite direct communication for providing coverage in areas where terrestrial network communications are unavailable, and positioning.

[0005] In addition, in the field of air interface architecture / protocol, such technologies as the following are being standardized: Industrial Internet of Things (IIoT), which is used to support new services through interworking and integration with other industries; Integrated Access and Backhaul (IAB), which is used to provide nodes for network service area expansion by supporting wireless backhaul links and access links in an integrated manner; Mobility enhancement including conditional handover and DAPS (dual active protocol stack) handover; and two-step random access (2-step RACH for NR) for simplifying the random access process. In the field of system architecture / service, such technologies as the following are also being standardized: 5G baseline architecture (e.g., service-based architecture or service-based interface), which is used to combine network function virtualization (NFV) and software-defined network (SDN) technologies; and mobile edge computing (MEC), which is used to receive services based on UE location.

[0006] As such 5G mobile communication systems are commercialized, the number of connected devices, which has been growing exponentially, will be connected to the communication network, and it is therefore expected that there will be a need to enhance the functionality and performance of the 5G mobile communication systems and the integrated operation of the connected devices. To this end, new research related to the following technologies is planned: Extended Reality (XR) for effectively supporting Augmented Reality (AR), Virtual Reality (VR), Mixed Reality (MR), etc.; Improving 5G performance and reducing complexity by utilizing Artificial Intelligence (AI) and Machine Learning (ML); AI service support; Metaverse service support; and UAV communication.

[0007] In addition, this development of 5G mobile communication systems will serve as the basis for developing the following technologies: new waveforms for providing coverage in the terahertz band for 6G mobile communication technology; multi-antenna transmission technology (such as full-dimensional MIMO (FD-MIMO), array antennas, and large antennas); metamaterial-based lenses and antennas for improving the coverage of terahertz band signals; high-dimensional spatial multiplexing technology using orbital angular momentum (OAM); and reconfigurable smart surfaces (RIS), and will also serve as the basis for developing the following technologies: full-duplex technology for increasing the frequency efficiency of 6G mobile communication technology and improving system networks; AI-based communication technology for achieving system optimization by utilizing satellites and AI (artificial intelligence) from the design stage and internalizing end-to-end AI support functions; and next-generation distributed computing technology for achieving services at a complexity level that exceeds the limits of UE operating capabilities by utilizing ultra-high performance communication and computing resources. Summary of the invention

[0008]

Technical solution

[0009] According to an embodiment, a user equipment (UE) in a wireless communication system is provided. The UE includes a transceiver and a controller, the controller being coupled to the transceiver and configured to: receive configuration information associated with a channel state information (CSI) report from a base station, wherein the CSI report includes information about a time slot set for the CSI report and a channel quality indicator (CQI), determine at least one CQI corresponding to at least one time slot identified from the time slot set for the CSI report, and transmit the CSI report including information about the determined at least one CQI to the base station.

[0010] According to an embodiment, a method performed by a user equipment (UE) in a wireless communication system is provided. The method includes: receiving configuration information associated with a channel state information (CSI) report from a base station, wherein the CSI report includes information about a time slot set for the CSI report and a channel quality indicator (CQI), determining at least one CQI corresponding to at least one time slot identified from the time slot set for the CSI report, and transmitting the CSI report including information about the determined at least one CQI to the base station.

[0011] According to an embodiment, a base station in a wireless communication system is provided. The base station includes a transceiver and a controller, the controller being coupled to the transceiver and configured to transmit configuration information associated with a channel state information (CSI) report to a user equipment (UE), wherein the CSI report includes information about a time slot set for the CSI report and a channel quality indicator (CQI), and receive a CSI report from the UE, the CSI report including information about at least one CQI associated with at least one time slot in the time slot set for the CSI report.

[0012] According to an embodiment, a method performed by a base station in a wireless communication system is provided. The method includes transmitting configuration information associated with a channel state information (CSI) report to a user equipment (UE), wherein the CSI report includes information about a time slot set for the CSI report and a channel quality indicator (CQI), and receiving a CSI report from the UE, the CSI report including information about at least one CQI associated with at least one time slot in the time slot set for the CSI report. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:

[0014] Figure 1 An exemplary wireless network according to an embodiment of the present disclosure is shown;

[0015] Figure 2 An exemplary gNodeB (gNB) according to an embodiment of the present disclosure is shown;

[0016] Figure 3 An exemplary user equipment (UE) according to an embodiment of the present disclosure is shown;

[0017] Figure 4 illustrates exemplary wireless transmit and receive paths according to an embodiment of the present disclosure;

[0018] Figure 5 illustrates exemplary wireless transmit and receive paths according to an embodiment of the present disclosure;

[0019] Figure 6 A transmitter block diagram for a physical downlink shared channel (PDSCH) in a subframe according to an embodiment of the present disclosure is shown;

[0020] Figure 7 A receiver block diagram for PDSCH in a subframe according to an embodiment of the present disclosure is shown;

[0021] Figure 8 A transmitter block diagram for a physical uplink shared channel (PUSCH) in a subframe according to an embodiment of the present disclosure is shown;

[0022] Fig. 9 A receiver block diagram for PUSCH in a subframe according to an embodiment of the present disclosure is shown;

[0023] Fig.10 An exemplary antenna block or array forming beams according to an embodiment of the present disclosure is shown;

[0024] Fig.11 shows channel measurements with and without Doppler components according to an embodiment of the present disclosure;

[0025] Fig.12 An exemplary antenna port layout according to an embodiment of the present disclosure is shown;

[0026] Fig.13 A three-dimensional (3D) grid of oversampled discrete Fourier transform (DFT) beams according to an embodiment of the present disclosure is shown;

[0027] Fig.14 An example of a UE configured to receive a burst of non-zero power (NZP) CSI-RS resources according to an embodiment of the present disclosure is shown;

[0028] Fig.15 FIG. 1 shows a method configured to determine N based on a value B in a burst of a CSI-RS according to an embodiment of the present disclosure. 4 An example of a UE with a value of

[0029] Fig.16An example of a UE configured to divide resource blocks (RBs) into sub-bands and divide a time instance into sub-times according to an embodiment of the present disclosure is shown;

[0030] Fig.17 An example of a UE configured to measure a CSI-RS burst within a measurement window based on an NZP CSI-RS resource according to an embodiment of the present disclosure is shown;

[0031] Fig.18 An example of a UE configured to determine a CSI report valid during a CSI reporting / validity window according to an embodiment of the present disclosure is shown;

[0032] Fig.19 An example of a UE configured to determine a CSI report valid during a CSI reporting / validity window according to an embodiment of the present disclosure is shown;

[0033] Fig. 20 An example of a UE configured to determine a CSI report valid during a CSI reporting / validity window according to an embodiment of the present disclosure is shown;

[0034] Fig.21 An example of a UE configured to determine a CSI report valid during a CSI reporting / validity window according to an embodiment of the present disclosure is shown;

[0035] Fig. 22 An example of a UE configured to determine a CSI report valid during a CSI reporting / validity window according to an embodiment of the present disclosure is shown;

[0036] Fig.23 FIG. 1 shows a method configured to determine N according to an embodiment of the present disclosure. 4 An example of a UE with a value of

[0037] Fig.24 shows a CQI validity window according to an embodiment of the present disclosure;

[0038] Fig.25 shows a CQI validity window according to an embodiment of the present disclosure;

[0039] Fig.26 shows a CQI validity window according to an embodiment of the present disclosure;

[0040] Fig. 27 An example of a method performed by a UE according to an embodiment of the present disclosure is shown;

[0041] Fig.28 shows the structure of a UE according to an embodiment of the present disclosure; and

[0042] Fig.29 The structure of a base station according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0043] Discussed below Figures 1 to 29 The various embodiments used to describe the principles of the present disclosure in this patent document are merely for illustration and should not be interpreted in any way as limiting the scope of the present disclosure. Those skilled in the art will appreciate that the principles of the present disclosure can be implemented in any appropriately arranged system or device.

[0044] The following documents and standard descriptions are hereby incorporated by reference into the present disclosure as if fully set forth herein: 3GPP TS 36.211 v17.0.0, "E-UTRA, Physical channels and modulation" (hereinafter referred to as "REF 1"); 3GPP TS 36.212 v17.0.0, "E-UTRA, Multiplexing and Channel coding" (hereinafter referred to as "REF 2"); 3GPP TS 36.213 v17.0.0, "E-UTRA, Physical Layer Procedures" (hereinafter referred to as "REF 3"); 3GPP TS 36.321 v17.0.0, "E-UTRA, Medium Access Control (MAC) protocol specification" (hereinafter referred to as "REF 4"); 4”); 3GPP TS 36.331 v17.0.0 “E-UTRA, Radio Resource Control (RRC) protocol specification” (hereinafter referred to as “REF 5”); 3GPP TR 22.891 v1.2.0 (hereinafter referred to as “REF 6”); 3GPP TS 38.212 v17.0.0, “E-UTRA, NR, Multiplexing and channel coding” (hereinafter referred to as “REF 7”); 3GPP TS 38.214 v17.0.0; “NR, Physical Layer Procedures for Data” (hereinafter referred to as “REF 8”); RP-192978, “Measurement results on Doppler spectrum for various UEmobility environments and related CSI "Measurement results of the Doppler spectrum for various UE mobility environments and associated CSI enhancements", Fraunhofer IIS, Fraunhofer Hertz Institute for Telecommunications, Deutsche Telekom (hereinafter referred to as "REF 9"); 3GPP TS 38.211v17.0.0 and “E-UTRA, NR, Physical channels and modulation” (hereinafter referred to as “REF 10”).

[0045] Wireless communication has been one of the most successful innovations in modern history. Recently, the number of subscribers to wireless communication services has exceeded five billion and continues to grow rapidly. Due to the increasing popularity of smartphones and other mobile data devices (such as tablet computers, "notebook" computers, netbooks, e-book readers, and machine-type devices) among consumers and business people, the demand for wireless data services has increased rapidly. In order to meet the high growth of mobile data services and support new applications and deployments, improvements in radio interface efficiency and coverage are critical.

[0046] In order to meet the increased demand for wireless data traffic since the deployment of 4G communication systems and to realize various vertical applications, 5G / NR communication systems have been deployed and are currently being deployed. 5G / NR communication systems are considered to be implemented in higher frequency (millimeter wave) bands (e.g., 28 GHz or 60 GHz bands) to achieve higher data rates, or in lower frequency bands (such as 6 GHz) to achieve robust coverage and mobility support. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and large antenna technology are discussed in 5G / NR communication systems.

[0047] In addition, in the 5G / NR communication system, development of system network improvements is underway based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communications, wireless backhaul, mobile networks, cooperative communications, coordinated multi-point (CoMP), receiving-end interference cancellation, etc.

[0048] The discussion of 5G systems and frequency bands associated therewith is for reference purposes only, as certain embodiments of the present disclosure may be implemented in 5G systems. However, the present disclosure is not limited to 5G systems or frequency bands associated therewith, and embodiments of the present disclosure may be used in conjunction with any frequency band. For example, aspects of the present disclosure may also be applied to 5G communication systems, 6G, or even higher deployments that may use terahertz (THz) bands.

[0049] the following Figures 1 to 3 Various embodiments are described that are implemented in a wireless communication system and utilizing Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) communication techniques. Figures 1 to 3The description is not intended to imply physical or architectural limitations to the manner in which different embodiments may be implemented. Different embodiments of the present disclosure may be implemented in any suitably arranged communications system.

[0050] With all the technical activities around the world for various candidate technologies from industry and academia, the momentum for 5th Generation (5G) or New Radio (NR) mobile communications has been increasing recently. Candidate enablers for 5G / NR mobile communications include: massive antenna technology, from legacy cellular bands to high frequencies to provide beamforming gain and support increased capacity, new waveforms (e.g., new radio access technologies (RATs)) for flexible adaptation to various services / applications with different requirements, new multiple access schemes for supporting large-scale connectivity, and more.

[0051] The present disclosure relates to apparatus and methods for CSI reference resources and reporting windows.

[0052] In one embodiment, a user equipment (UE) is provided. The UE includes a transceiver configured to receive a configuration about a CSI report, the configuration including information about (i) a time slot set S for CSI reporting, (ii) X CQIs, and (iii) N time slots, where X≥1, N∈S, S includes {1,2}, and the N time slots are from the time slot set S and are associated with the X CQIs. The UE includes a processor operably connected to the transceiver. The processor is configured to determine the X CQIs based on the N time slots based on the configuration. The transceiver is also configured to transmit a CSI report, the CSI report including (i) an indicator indicating a plurality of precoding matrices and each time slot in the time slot set S is associated with one of the plurality of precoding matrices, and (ii) the X CQIs.

[0053] In another embodiment, a base station (BS) is provided. The BS includes a processor and a transceiver operably connected to the processor. The processor is configured to transmit a configuration about a CSI report, the configuration including information about (i) a time slot set S for CSI reporting, (ii) X CQIs, and (iii) N time slots, where X≥1, N∈S, S includes {1,2}, and the N time slots are from the time slot set S and are associated with the X CQIs, and receive a CSI report, the CSI report including (i) an indicator indicating multiple precoding matrices and each time slot in the time slot set S is associated with one of the multiple precoding matrices, and (ii) X CQIs.

[0054] In yet another embodiment, a method performed by a UE is provided. The method includes receiving a configuration for a CSI report, the configuration including information about (i) a time slot set S for CSI reporting, (ii) X channel quality indicators (CQIs), and (iii) N time slots, where X≥1, N∈S, S includes {1,2}, and the N time slots are from the time slot set S and are associated with the X CQIs. The method also includes determining the X CQIs based on the N time slots, and transmitting a CSI report, the CSI report including (i) an indicator indicating a plurality of precoding matrices and each time slot in the time slot set S is associated with one of the plurality of precoding matrices, and (ii) the X CQIs.

[0055] Other technical features may be apparent to those skilled in the art from the following drawings, descriptions and claims.

[0056] Before the following detailed description, it may be advantageous to set forth the definitions of certain words and phrases used throughout this patent document. The term "connection" and its derivatives refer to any direct or indirect communication between two or more elements, whether or not these elements are in physical contact with each other. The terms "transmit", "receive" and "communication" and their derivatives cover direct and indirect communication. The terms "include" and "includes" and their derivatives mean including but not limited to. The term "or" is inclusive, meaning and / or. The phrase "associated with..." and its derivatives mean including, included in, interconnected with, included in, included in, connected to, connected to, connected to, connected to, connected to, can communicate with, collaborate with, interlace, juxtapose, be adjacent to, be coupled to, coupled to, have, have characteristics, have a relationship with, or have a relationship with, etc. The term "controller" refers to any device, system, or part thereof that controls at least one operation. Such a controller can be implemented in hardware or a combination of hardware and software and / or firmware. The function associated with any particular controller can be centralized or distributed, whether local or remote. The phrase "at least one of" when used with a list of items means that different combinations of one or more of the listed items may be used, and only one item in the list may be required. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C.

[0057] In addition, the various functions described below can be implemented or supported by one or more computer programs, each of which is formed by a computer-readable program code and embedded in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, steps, functions, objects, classes, instances, related data or a part thereof suitable for being implemented with a suitable computer-readable program code. The phrase "computer-readable program code" includes any type of computer code, including source code, object code and executable code. The phrase "computer-readable medium" includes any type of medium that can be accessed by a computer, such as a read-only memory (ROM), a random access memory (RAM), a hard drive, a compact disc (CD), a digital video disc (DVD) or any other type of memory. "Non-transitory" computer-readable medium excludes wired, wireless, optical or other communication links that transmit instantaneous electrical signals or other signals. Non-transitory computer-readable media include media that can store data permanently, and media that can store data and rewrite data later, such as rewritable optical discs or erasable memory devices.

[0058] Definitions for certain other words and phrases are provided throughout this patent document. Those of ordinary skill in the art should understand that in many, if not most instances, such definitions apply to prior, as well as future uses of such defined words and phrases.

[0059] Figure 1 An exemplary wireless network according to an embodiment of the present disclosure is shown. Figure 1 The embodiment of the wireless network shown in FIG. 1 is for illustration only. Other embodiments of the wireless network 100 may be used without departing from the scope of the present disclosure.

[0060] like Figure 1 As shown, the wireless network includes gNB 101 (e.g., base station, BS), gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one network 130, such as the Internet, a proprietary Internet Protocol (IP) network, or other data network.

[0061] gNB 102 provides wireless broadband access to network 130 for a first plurality of user equipment (UE) located within coverage area 120 of gNB 102. The first plurality of UEs include: UE 111, which may be located in a small business; UE 112, which may be located in an enterprise; UE 113, which may be a WiFi hotspot; UE 114, which may be located in a first residence; UE 115, which may be located in a second residence; and UE 116, which may be a mobile device such as a cellular phone, a wireless laptop, a wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within coverage area 125 of gNB 103. The second plurality of UEs includes UE 115 and UE 116. In some embodiments, one or more of gNBs 101 to 103 may communicate with each other and with UEs 111 to 116 using 5G / NR, Long Term Evolution (LTE), Long Term Evolution-Advanced (LTE-A), WiMAX, WiFi, or other wireless communication technologies.

[0062] Depending on the network type, the term "base station" or "BS" may refer to any component (or set of components) configured to provide wireless access to a network, such as a transmission point (TP), a transmission-reception point (TRP), an enhanced base station (eNodeB or eNB), a 5G / NR base station (gNB), a macro cell, a femto cell, a WiFi access point (AP), or other wirelessly capable devices. A base station may provide wireless access according to one or more wireless communication protocols, such as 5G / NR Third Generation Partnership Project (3GPP) NR, Long Term Evolution (LTE), LTE Advanced (LTE-A), High Speed ​​Packet Access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc. For convenience, the terms "BS" and "TRP" are used interchangeably in this patent document to refer to network infrastructure components that provide wireless access to remote terminals. In addition, depending on the network type, the term "user equipment" or "UE" may refer to any component, such as a "mobile station", "subscriber station", "remote terminal", "wireless terminal", "reception point", or "user equipment". For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to a remote wireless device that wirelessly accesses a BS, whether the UE is a mobile device (such as a mobile phone or smartphone) or is generally considered a fixed device (such as a desktop computer or vending machine).

[0063] The dashed lines illustrate the approximate extents of coverage areas 120 and 125, which are shown as generally circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with a gNB, such as coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment associated with natural and man-made obstacles.

[0064] As described in more detail below, one or more of the UEs 111 to 116 include circuitry, programming, or a combination thereof for supporting or utilizing CSI reference resources and reporting windows. In certain embodiments, one or more of the BSs 101 to 103 include circuitry, programming, or a combination thereof for supporting CSI reference resources and reporting windows.

[0065] although Figure 1 An example of a wireless network is shown, but Figure 1 Various changes may be made. For example, the wireless network may include any number of gNBs and any number of UEs in any suitable arrangement. In addition, gNB 101 may communicate directly with any number of UEs and provide those UEs with wireless broadband access to network 130. Similarly, each gNB 102-103 may communicate directly with network 130 and provide the UEs with direct wireless broadband access to network 130. In addition, gNBs 101, 102, and / or 103 may provide access to other or additional external networks, such as an external telephone network or other type of data network.

[0066] Figure 2 An exemplary gNB 102 according to an embodiment of the present disclosure is shown. Figure 2 The embodiment of the gNB 102 shown is for illustration purposes only, and Figure 1 gNBs 101 and 103 may have the same or similar configurations. However, gNBs have a wide variety of configurations, and Figure 2 The scope of the present disclosure is not limited to any particular implementation of the gNB.

[0067] like Figure 2 As shown, the gNB 102 includes multiple antennas 205a to 205n, multiple transceivers 210a to 210n, a controller / processor 225, a memory 230, and a backhaul or network interface 235.

[0068] RF transceivers 210a to 210n receive incoming RF signals from antennas 205a to 205n, such as signals transmitted by UEs in network 100. Transceivers 210a to 210n downconvert incoming RF signals to generate IF or baseband signals. The IF or baseband signals are processed by receive (RX) processing circuitry in transceivers 210a to 210n and / or controller / processor 225, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. Controller / processor 225 may further process the baseband signals.

[0069] Transmit (TX) processing circuitry in the transceivers 210a-210n and / or the controller / processor 225 receives analog or digital data (such as voice data, network data, email, or interactive video game data) from the controller / processor 225. The TX processing circuitry encodes, multiplexes, and / or digitizes the outgoing baseband data to generate processed baseband or IF signals. The transceivers 210a-210n up-convert the baseband or IF signals into RF signals that are transmitted via the antennas 205a-205n.

[0070] The controller / processor 225 may include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 225 may control the reception of UL channel signals and the transmission of DL channel signals by the transceivers 210a to 210n in accordance with well-known principles. The controller / processor 225 may also support additional functionality, such as more advanced wireless communication functionality. For example, the controller / processor 225 may support beamforming or directional routing operations, in which outgoing / incoming signals from / to multiple antennas 205a to 205n are weighted differently to effectively steer the outgoing signals in a desired direction. As another example, the controller / processor 225 may support methods for CSI reference resources and reporting windows. Any of a variety of other functions may be supported in the gNB 102 by the controller / processor 225.

[0071] Controller / processor 225 is also capable of executing programs and other processes, such as an OS, that reside in memory 230. Controller / processor 225 may move data into or out of memory 230 as required by the executing process.

[0072] The controller / processor 225 is also connected to a backhaul or network interface 235. The backhaul or network interface 235 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or via a network. The interface 235 can support communication via any appropriate wired or wireless connection. For example, when the gNB 102 is implemented as part of a cellular communication system (such as a cellular communication system supporting 5G / NR, LTE, or LTE-A), the interface 235 can allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the interface 235 can allow the gNB 102 to communicate with a larger network (such as the Internet) via a wired or wireless local area network or via a wired or wireless connection. The interface 235 includes any suitable structure (such as Ethernet or a transceiver) that supports communication via a wired or wireless connection.

[0073] Memory 230 is coupled to controller / processor 225. A portion of memory 230 may include RAM, and another portion of memory 230 may include flash memory or other ROM.

[0074] Although Figure 2 An example of a gNB 102 is shown, but the Figure 2 For example, gNB 102 may include Figure 2 Any quantity of each component shown. In addition, Figure 2 The various components in may be combined, further subdivided, or omitted, and additional components may be added according to specific needs.

[0075] Figure 3 An exemplary UE 116 is shown in accordance with an embodiment of the present disclosure. Figure 3 The embodiment of UE 116 shown is for illustration only, and Figure 1 UEs 111 to 115 may have the same or similar configurations. However, UEs have a wide variety of configurations, and Figure 3 The scope of the present disclosure is not limited to any particular implementation of the UE.

[0076] like Figure 3 As shown, UE 116 includes antenna 305, transceiver 310, and microphone 320. UE 116 also includes speaker 330, processor 340, input / output (I / O) interface (IF) 345, input 350, display 355, and memory 360. Memory 360 includes operating system (OS) 361 and one or more applications 362.

[0077] Transceiver 310 receives incoming RF signals transmitted by a gNB of network 100 from antenna 305. Transceiver 310 downconverts the incoming RF signals to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is processed by RX processing circuitry in transceiver 310 and / or processor 340, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. The RX processing circuitry sends the processed baseband signal to speaker 330 (such as for voice data) or is processed by processor 340 (such as for web browsing data).

[0078] The TX processing circuitry in the transceiver 310 and / or processor 340 receives analog or digital voice data from the microphone 320 or other outgoing baseband data (such as web data, email, or interactive video game data) from the processor 340. The TX processing circuitry encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The transceiver 310 up-converts the baseband or IF signal to an RF signal that is transmitted via the antenna 305.

[0079] The processor 340 may include one or more processors or other processing devices and execute the OS 361 stored in the memory 360 to control the overall operation of the UE 116. For example, the processor 340 may control the transceiver 310 to receive DL channel signals and transmit UL channel signals according to well-known principles. In some embodiments, the processor 340 includes at least one microprocessor or microcontroller.

[0080] The processor 340 is also capable of executing other processes and programs resident in the memory 360. For example, the processor 340 may execute processes for supporting or utilizing CSI reference resources and reporting windows as described in embodiments of the present disclosure. The processor 340 may move data into or out of the memory 360 as needed to execute the processes. In some embodiments, the processor 340 is configured to execute the application 362 based on the OS 361 or in response to a signal received from the gNB or operator. The processor 340 is also coupled to an I / O interface 345, which provides the UE 116 with the ability to connect to other devices such as laptops and handheld computers. The I / O interface 345 is a communication path between these accessories and the processor 340.

[0081] Processor 340 is also coupled to input 350 (which includes, for example, a touch screen, a keypad, etc.) and display 355. An operator of UE 116 may use input 350 to enter data into UE 116. Display 355 may be a liquid crystal display, a light emitting diode display, or other display capable of presenting text and / or at least limited graphics (such as from a website).

[0082] Memory 360 is coupled to processor 340. A portion of memory 360 may include random access memory (RAM), and another portion of memory 360 may include flash memory or other read-only memory (ROM).

[0083] Although Figure 3 An example of UE 116 is shown, but the Figure 3 Make various changes. For example, Figure 3 The various components in may be combined, further subdivided, or omitted, and additional components may be added as required. As a specific example, processor 340 may be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). In another example, transceiver 310 may include any number of transceivers and signal processing chains and may be connected to any number of antennas. Additionally, although Figure 3 The UE 116 is shown configured as a mobile phone or smart phone, but the UE may be configured to operate as other types of mobile or stationary devices.

[0084] Figure 4 and Figure 5 An exemplary wireless transmission and reception path according to the present disclosure is shown. In the following description, Figure 4 The transmission path 400 of can be described as being implemented in a BS (such as BS102), while Figure 5 The receive path 500 may be described as being implemented in a UE, such as UE 116. However, it is understood that the receive path 500 may be implemented in a BS and the transmit path 400 may be implemented in a UE. In some embodiments, the receive path 500 is configured to support CSI reference resources and reporting windows, as described in embodiments of the present disclosure.

[0085] like Figure 4 The transmit path 400 shown includes a channel coding and modulation block 405, a serial to parallel (S to P) block 410, an inverse fast Fourier transform (IFFT) block of size N 415, a parallel to serial (P to S) block 420, an add cyclic prefix block 425, and an upconverter (UC) 430. Figure 5The illustrated receive path 500 includes a downconverter (DC) 555, a remove cyclic prefix block 560, a serial to parallel (S to P) block 565, a size N fast Fourier transform (FFT) block 570, a parallel to serial (P to S) block 575, and a channel decoding and demodulation block 580.

[0086] like Figure 4 As shown, the channel coding and modulation block 405 receives a set of information bits, applies coding (such as low-density parity check (LDPC) coding) and modulates the input bits (such as with quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) to generate a sequence of frequency-domain modulation symbols. The serial-to-parallel block 410 converts (such as demultiplexes) the serially modulated symbols into parallel data to generate N parallel symbol streams, where N is the IFFT / FFT size used in the BS 102 and the UE 116. The size-N IFFT block 415 performs an IFFT operation on the N parallel symbol streams to generate a time-domain output signal. The parallel-to-serial block 420 converts (such as multiplexes) the parallel time-domain output symbols from the size-N IFFT block 415 to generate a serial time-domain signal. The add cyclic prefix block 425 inserts a cyclic prefix into the time-domain signal. Upconverter 430 modulates (such as upconverts) the output of add cyclic prefix block 425 to RF frequency for transmission via a wireless channel. The signal may also be filtered at baseband prior to conversion to RF frequency.

[0087] The RF signal transmitted from the BS 102 reaches the UE 116 after passing through the wireless channel, and an operation opposite to that at the BS 102 is performed at the UE 116 .

[0088] like Figure 5 As shown, the down converter 555 down-converts the received signal to the baseband frequency, and the remove cyclic prefix block 560 removes the cyclic prefix to generate a serial time domain baseband signal. The serial to parallel block 565 converts the time domain baseband signal to a parallel time domain signal. The size N FFT block 570 performs an FFT algorithm to generate N parallel frequency domain signals. The parallel to serial block 575 converts the parallel frequency domain signals into a sequence of modulated data symbols. The channel decoding and demodulation block 580 demodulates and decodes the modulated symbols to recover the original input data stream.

[0089] Each of BSs 101 to 103 may implement a similar method as that for transmitting in the downlink to UEs 111 to 116. Figure 4 The transmission path 400 shown in FIG. 4 and may be implemented similarly to the transmission path 400 received from UEs 111 to 116 in the uplink. Figure 5Receive path 500 is shown. Similarly, each of UEs 111 to 116 may implement transmit path 400 for transmitting in the uplink to BSs 101 to 103 and may implement receive path 500 for receiving in the downlink from BSs 101 to 103.

[0090] It can be implemented using hardware or a combination of hardware and software / firmware Figure 4 and Figure 5 As a specific example, Figure 4 and Figure 5 At least some of the components in can be implemented in software, while other components can be implemented by configurable hardware or a mixture of software and configurable hardware. For example, FFT block 570 and IFFT block 415 can be implemented as a configurable software algorithm, wherein the value of size N can be modified according to the implementation.

[0091] In addition, although described as using FFT and IFFT, this is only by way of illustration and should not be construed as limiting the scope of the present disclosure. Other types of transforms may be used, such as discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT) functions. It will be appreciated that the value of the variable N may be any integer (such as 1, 2, 3, 4, etc.) for the DFT and IDFT functions, while the value of the variable N may be any integer (such as 1, 2, 4, 8, 16, etc.) as a power of two for the FFT and IFFT functions.

[0092] although Figure 4 and Figure 5 Examples of wireless transmit and receive paths are shown, but may be Figure 4 and Figure 5 Make various changes. For example, Figure 4 and Figure 5 The various components in may be combined, further subdivided, or omitted, and additional components may be added according to specific needs. Figure 4 and Figure 5 It is intended to illustrate examples of the types of transmit and receive paths that may be used in a wireless network. Any other suitable architecture may be used to support wireless communications in a wireless network.

[0093] The communication system includes a downlink (DL) and an uplink (UL), wherein the downlink (DL) transmits signals from a transmission point such as a base station (BS) or NodeB to a user equipment (UE), and the uplink (UL) transmits signals from a UE to a receiving point such as a NodeB. A UE (also commonly referred to as a terminal or mobile station) can be fixed or mobile and can be a cellular phone, a personal computer device, or an automatic device. An eNodeB, which is generally a fixed station, may also be referred to as an access point or other equivalent terms. For an LTE system, a NodeB is generally referred to as an eNodeB.

[0094] In a communication system such as an LTE system, a DL signal may include a data signal that transmits information content, a control signal that transmits DL control information (DCI), and a reference signal (RS) also known as a pilot signal. The eNodeB transmits data information through a physical DL shared channel (PDSCH). The eNodeB transmits DCI through a physical DL control channel (PDCCH) or an enhanced PDCCH (EPDCCH)—see also REF 3. The eNodeB transmits confirmation information in a physical hybrid ARQ indicator channel (PHICH) in response to a data transmission block (TB) transmission from a UE. The eNodeB transmits one or more of a plurality of types of RS, including a UE-common RS (CRS), a channel state information RS (CSI-RS), or a demodulation RS (DMRS). The CRS is transmitted over a DL system bandwidth (BW) and may be used by the UE to obtain a channel estimate to demodulate data or control information or to perform measurements. To reduce CRS overhead, the eNodeB may transmit the CSI-RS at a smaller time domain and / or frequency domain density than the CRS. The DMRS may be transmitted only in the BW of the corresponding PDSCH or EPDCCH, and the UE may use the DMRS to demodulate data or control information in the PDSCH or EPDCCH, respectively. A transmission time interval for a DL channel is called a subframe and may have a duration of, for example, 1 millisecond.

[0095] The DL signal also includes the transmission of logical channels that carry system control information. When the DL signal transmits a master information block (MIB), the BCCH is mapped to a transport channel called a broadcast channel (BCH); or when the DL signal transmits a system information block (SIB), the BCCH is mapped to a DL shared channel (DL-SCH). Most system information is included in different SIBs transmitted using DL-SCH. The presence of system information on the DL-SCH in a subframe can be indicated by transmitting a corresponding PDCCH for transmitting a codeword with a cyclic redundancy check (CRC) scrambled with a system information RNTI (SI-RNTI). Alternatively, scheduling information for SIB transmission can be provided in an earlier SIB, and scheduling information for the first SIB (SIB-1) can be provided by the MIB.

[0096] DL resource allocation is performed in units of subframes and a group of physical resource blocks (PRBs). The transmission BW consists of frequency resource units called resource blocks (RBs). Each RB consists of Subcarriers or resource elements (REs), such as 12 REs. The unit of one RB on one subframe is called a PRB. A total of 12 REs can be allocated to a UE for PDSCH transmission BW. M of RE PDSCH RBs.

[0097] The UL signal may include a data signal for transmitting data information, a control signal for transmitting UL control information (UCI), and a UL RS. The UL RS includes a DMRS and a sounding RS (SRS). The UE transmits the DMRS only in the BW of the corresponding PUSCH or PUCCH. The eNodeB may use the DMRS to demodulate the data signal or the UCI signal. The UE transmits the SRS to provide the eNodeB with UL CSI. The UE sends data information or UCI through its respective physical UL shared channel (PUSCH) or physical UL control channel (PUCCH). If the UE needs to send data information and UCI in the same UL subframe, the UE may multiplex both in the PUSCH. UCI includes: Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) information, used to indicate correct (ACK) or incorrect (NACK) detection of data TBs in PDSCH, or the absence of PDCCH detection (DTX); Scheduling Request (SR), which indicates whether the UE has data in the UE's buffer; Rank Indicator (RI); and Channel State Information (CSI) for enabling the eNodeB to perform link adaptation for PDSCH transmission to the UE. HARQ-ACK information is also transmitted by the UE in response to detection of PDCCH / EPDCCH indicating release of semi-persistently scheduled PDSCH (see also REF 3).

[0098] The UL subframe (or time slot) includes two time slots. Each time slot includes a time slot for transmitting data information, UCI, DMRS or SRS. The frequency resource unit of UL system BW is RB. A total of 10 RBs are allocated to the UE for transmitting BW. N of REs RB RBs. For PUCCH, N RB = 1. The last subframe symbol can be used to multiplex SRS transmissions from one or more UEs. The number of subframe symbols available for data / UCI / DMRS transmission is If the last subframe symbol is used to transmit SRS, then N SRS =1; otherwise N SRS =0.

[0099] Figure 6 A transmitter block diagram 600 for PDSCH in a subframe is shown according to an embodiment of the present disclosure. Figure 6 The illustrated embodiment of transmitter block diagram 600 is for illustration only. Figure 6 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions described. Figure 6 The scope of the present disclosure is not limited to any particular implementation of transmitter block diagram 600 .

[0100] like Figure 6 As shown, information bits 610 are encoded by an encoder 620 (such as a turbo encoder) and modulated by a modulator 630, for example using quadrature phase shift keying (QPSK) modulation. A serial-to-parallel (S / P) converter 640 generates M modulation symbols, which are then provided to a mapper 650 to map to REs selected by a transmit BW selection unit 655 for the assigned PDSCH transmit BW, a unit 660 applies an inverse fast Fourier transform (IFFT), and then a parallel-to-serial (P / S) converter 670 serializes the output to create a time domain signal, filtering is applied by a filter 680, and the signal is transmitted 690. Additional functions, such as data scrambling, cyclic prefix insertion, time windowing, interleaving, and other functions are well known in the art and are not shown for brevity.

[0101] Figure 7 A receiver block diagram 700 for PDSCH in a subframe according to an embodiment of the present disclosure is shown. Figure 7 The embodiment of diagram 700 shown is for illustration only. Figure 7One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions described. Figure 7 The scope of the present disclosure is not limited to any particular implementation of diagram 700 .

[0102] like Figure 7 As shown, filter 720 filters received signal 710, RE 730 for the assigned receive BW is selected by BW selector 735, unit 740 applies a fast Fourier transform (FFT), and parallel-to-serial converter 750 serializes the output. Subsequently, demodulator 760 coherently demodulates the data symbols by applying a channel estimate obtained from a DMRS or CRS (not shown), and decoder 770 (such as a turbo decoder) decodes the demodulated data to provide an estimate of information data bits 780. For the sake of brevity, additional functions such as time windowing, cyclic prefix removal, descrambling, channel estimation, and deinterleaving are not shown.

[0103] Figure 8 A transmitter block diagram 800 for PUSCH in a subframe is shown according to an embodiment of the present disclosure. Figure 7 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions described. Figure 8 The illustrated embodiment of block diagram 800 is for illustration only. Figure 8 The scope of the present disclosure is not limited to any particular implementation of block diagram 800 .

[0104] like Figure 8 As shown, information data bits 810 are encoded by an encoder 820 (such as a turbo encoder) and modulated by a modulator 830. A discrete Fourier transform (DFT) unit 840 applies DFT to the modulated data bits, a transmit BW selection unit 855 selects REs 850 corresponding to the assigned PUSCH transmit BW, a unit 860 applies IFFT, and after cyclic prefix insertion (not shown), filtering is applied by a filter 870 and the signal is transmitted 880.

[0105] Fig. 9 A receiver block diagram 900 for PUSCH in a subframe according to an embodiment of the present disclosure is shown. Fig. 9 The illustrated embodiment of block diagram 900 is for illustration only. Fig. 9 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions described. Fig. 9 The scope of the present disclosure is not limited to any particular implementation of block diagram 900 .

[0106] like Fig. 9 As shown, filter 920 filters the received signal 910. Subsequently, after removing the cyclic prefix (not shown), unit 930 applies FFT, receive BW selector 945 selects RE940 corresponding to the assigned PUSCH receive BW, unit 950 applies inverse DFT (IDFT), demodulator 960 coherently demodulates the data symbols by applying a channel estimate obtained from a DMRS (not shown), and decoder 970 (such as a turbo decoder) decodes the demodulated data to provide an estimate of the information data bit 980.

[0107] In the next generation of cellular systems, in addition to the capabilities of the LTE system, various use cases are envisioned. Systems capable of operating at frequencies below 6 GHz and above 6 GHz (for example, in the millimeter wave range) are called 5G or fifth generation cellular systems, and have become one of the requirements. In 3GPP TR 22.891, 74 5G use cases have been identified and described; these use cases can be roughly classified into three different groups. The first group is called "enhanced mobile broadband (eMBB)", which targets high data rate services with lower latency and reliability requirements. The second group is called "ultra-reliable and low latency (URLL)", which targets applications with less stringent data rate requirements but lower latency tolerance. The third group is called "massive MTC (mMTC)", which targets a large number of low-power device connections (such as 1 million / km) with less stringent reliability, data rate and latency requirements. 2 ).

[0108] The 3GPP NR specification supports up to 32 CSI-RS antenna ports, which enables gNBs to be equipped with a large number of antenna elements (such as 64 or 128). In this case, multiple antenna elements are mapped to one CSI-RS port. For next-generation cellular systems such as 5G, the maximum number of CSI-RS ports can remain the same or increase.

[0109] Fig.10 An exemplary antenna block or array 1000 is shown in accordance with an embodiment of the disclosure. Fig.10 The illustrated embodiment of antenna block or array 1000 is for illustration only. Fig.10 The scope of the present disclosure is not limited to any particular implementation of an antenna block or array.

[0110] For mmWave bands, while the number of antenna elements can be larger for a given form factor, the number of CSI-RS ports (which may correspond to the number of digital precoding ports) is often limited due to hardware limitations (such as the feasibility of installing a large number of ADCs / DACs at mmWave frequencies), e.g. Fig.10 As shown. In this case, one CSI-RS port is mapped to a large number of antenna elements that can be controlled by a set of analog phase shifters 1001. One CSI-RS port can then correspond to a subarray that produces a narrow analog beam through analog beamforming 1005. This analog beam can be configured to sweep a wider angular range 1020 by changing the phase shifter set across symbols or subframes. The number of subarrays (equal to the number of RF chains) is proportional to the number of CSI-RS ports N. CSI-PORT The digital beamforming unit 1010 performs the N- CSI-PORT The digital precoding can be a linear combination of analog beams to further increase the precoding gain. While the analog beams are wideband (and therefore not frequency selective), the digital precoding can vary across frequency subbands or resource blocks.

[0111] In order to achieve digital precoding, the effective design of CSI-RS is a key factor. To this end, three types of CSI reporting mechanisms corresponding to three types of CSI-RS measurements can be considered: 1) "Class A" CSI report, which corresponds to unprecoded CSI-RS; 2) "Class B" report, with K = 1 CSI-RS resources corresponding to UE-specific beamforming CSI-RS; 3) "Class B" report, with K>1 CSI-RS resources corresponding to cell-specific beamforming CSI-RS. For non-precoded (NP) CSI-RS, a cell-specific one-to-one mapping between CSI-RS ports and TXRU is utilized. Here, different CSI-RS ports have the same wide beam width and direction, and therefore have substantially the same cell width coverage. For beamformed CSI-RS, cell-specific or UE-specific beamforming operations are applied to non-zero power (NZP) CSI-RS resources (consisting of multiple ports). Here, (at least at a given time / frequency) the CSI-RS ports have a narrower beamwidth and therefore do not have cell-wide coverage, and (at least from the perspective of the eNB (or gNB)) at least some CSI-RS port resource combinations have different beam directions.

[0112] In scenarios where DL long-term channel statistics can be measured via the UL signal at the serving eNodeB, UE-specific BF CSI-RS can be easily used. This is usually feasible when the UL-DL duplex distance is small enough. However, when this condition does not hold, some UE feedback is necessary for the eNodeB to obtain an estimate of the DL long-term channel statistics (or any representation thereof). To facilitate this process, the first BF CSI-RS is transmitted with a periodicity of T1 (ms) and the second NP CSI-RS is transmitted with a periodicity of T2 (ms), where T1≤T2. This approach is called hybrid CSI-RS. The implementation of hybrid CSI-RS depends largely on the definition of the CSI process and the NZP CSI-RS resources.

[0113] In wireless communication systems, MIMO is generally identified as a necessary feature for achieving high system throughput requirements. One of the key components of MIMO transmission schemes is accurate CSI acquisition at the eNB (or gNB) (or TRP). In particular, for MU-MIMO, the availability of accurate CSI is necessary to ensure high MU performance. For TDD systems, CSI can be acquired using SRS transmissions relying on channel reciprocity. On the other hand, for FDD systems, CSI can be acquired using CSI-RS transmissions from the eNB (or gNB) and CSI acquisition and feedback from the UE. In traditional FDD systems, the CSI feedback framework is "implicit" in the form of CQI / PMI / RI (and CRI and LI) derived from the codebook, assuming SU transmissions from the eNB (or gNB). Due to the inherent SU assumptions in deriving CSI, this implicit CSI feedback is insufficient for MU transmissions. Since future (e.g., NR) systems may be more MU-centric, this SU-MU CSI mismatch will become a bottleneck for achieving high MU performance gains. Another problem with implicit feedback is scalability in the case of a large number of antenna ports at the eNB (or gNB). For a large number of antenna ports, the codebook design for implicit feedback is quite complex (e.g., the total number of Class A codebooks in the 3GPP LTE specification is 44), and there is no guarantee that the designed codebook will bring a reasonable performance advantage in actual deployment scenarios (e.g., it can only show a small percentage gain at best). Recognizing the above issues, the 3GPP specification also supports advanced CSI reporting in LTE.

[0114] In 5G or NR systems [REF7, REF8], the above-mentioned "implicit" CSI reporting paradigm from LTE is also supported and is called Type I CSI reporting. In addition, high-resolution CSI reporting, called Type II CSI reporting, is also supported in the Release 15 specification to provide gNB with more accurate CSI information for use cases such as high-order MU-MIMO. However, in actual UE implementations, the overhead of Type II CSI reporting may be a problem. One way to reduce Type II CSI overhead is based on frequency domain (FD) compression. In Release 16 NR, DFT-based FD compression of Type II CSI is already supported (referred to as enhanced Type II codebook for Release 16 in REF8). Some key components of this feature include (a) spatial domain (SD) basis W 1 (b) FD basis W f and (c) the coefficients of the linear combination SD and FD basis In non-reciprocal FDD systems, the UE needs to report the complete CSI (including all components). However, when there is reciprocity or partial reciprocity between UL and DL, some CSI components can be obtained based on the UL channel estimated using SRS transmissions from the UE. In Release 16 of NR, DFT-based FD compression is extended to this partial reciprocity case (called the enhanced type II port selection codebook for Release 16 in REF8), where W 1 The DFT-based SD basis in is replaced by SD CSI-RS port selection, i.e., from In this case, the CSI-RS ports are beamformed in SD (assuming the UL-DL channel is reciprocal in the angle domain) and the beamforming information can be obtained at the gNB based on the UL channel estimated using SRS measurements.

[0115] It is known in the literature that if the UL-DL duplex distance is small, the UL-DL channel reciprocity can exist in both the angle domain and the delay domain. Since the delay in the time domain is transformed into (or closely related to) the basis vector in the frequency domain (FD), the enhanced type II port selection of Release 16 can be further extended to both the angle domain and the delay domain (or SD and FD). Specifically, W 1 The DFT-based SD basis and W fThe DFT-based FD basis in can be replaced with SD and FD port selection, i.e., L CSI-RS ports are selected in SD and / or M ports are selected in FD. In this case, the CSI-RS ports are beamformed in SD (assuming that the UL-DL channels are reciprocal in the angle domain) and / or FD (assuming that the UL-DL channels are reciprocal in the delay / frequency domain), and the corresponding SD and / or FD beamforming information can be obtained at the gNB based on the UL channel estimated using SRS measurements. The present disclosure provides some design components of such a codebook.

[0116] Various embodiments of the present disclosure recognize that when the UE speed is at medium or high speed, the performance of the Release 15 / 16 / 17 codebook begins to degrade rapidly due to rapid channel variations (which in turn is attributed to the Doppler component of the channel due to UE mobility) and the one-shot nature of CSI-RS measurements and CSI reporting in Release 15 / 16 / 17. This limits the usefulness of the Release 15 / 16 / 17 codebook to low mobility or static UEs. For medium or high mobility scenarios, there is a need to enhance the CSI-RS measurement and CSI reporting, which is based on the Doppler component of the channel. As described in [REF9], the Doppler component of the channel remains almost unchanged for a long time called the channel stationary time, which is significantly longer than the channel coherence time. It should be noted that the current (Release 15 / 16 / 17) CSI reporting is based on the channel coherence time, which does not apply when the channel has a significant Doppler component. The Doppler component of the channel can be calculated based on measuring reference signal (RS) bursts, where the RS can be a CSI-RS or SRS. When the RS is CSI-RS, the UE measures the CSI-RS burst and uses it to obtain the Doppler component of the DL channel, and when the RS is SRS, the gNB measures the SRS burst and uses it to obtain the Doppler component of the UL channel. The UE can report the obtained Doppler component using the codebook (as part of the CS report). Alternatively, the gNB can beamform the CSI-RS using the obtained Doppler component of the UL channel for the UE to use for CSI reporting.

[0117] Fig.11 Channel measurements with and without a Doppler component 1100 are shown according to an embodiment of the present disclosure. Fig.11 The embodiments of channel measurement with and without Doppler component 1100 shown in FIG. 1 are for illustration only. Fig.11 The scope of the present disclosure is not limited to any particular implementation of channel measurements with and without Doppler components.

[0118] Fig.11An illustration of channel measurement with and without a Doppler component is shown in FIG. When a channel is measured using a Doppler component (e.g., based on an RS burst), the measured channel can remain close to the actual changing channel. On the other hand, when a channel is measured without a Doppler component (e.g., based on a single RS), the measured channel can be away from the actual changing channel.

[0119] As described above, RS bursts need to be measured in order to obtain the Doppler component of the channel. Various embodiments of the present disclosure provide examples of units for obtaining Doppler domain components or determining the length of basis vectors for Doppler compression. Various embodiments of the present disclosure also describe signaling related to the CSI report format.

[0120] Various embodiments of the present disclosure provide mechanisms for acquiring CSI at a gNB. Specifically, various embodiments relate to CSI reporting based on a high-resolution (or Type II) codebook that includes spatial, frequency, and time (Doppler) domain components. Various embodiments of the present disclosure provide mechanisms for the relationship between CSI reference resources, CSI reporting windows, and DD / TD basis vector lengths and CSI reference resources, CSI-RS measurement windows, and CSI reporting windows.

[0121] All the following compositions and embodiments are applicable to UL transmission with CP-OFDM (Cyclic Prefix OFDM) waveform as well as DFT-SOFDM (DFT Spread OFDM) and SC-FDMA (Single Carrier FDMA) waveform. In addition, all the following compositions and embodiments are applicable to UL transmission when the scheduling time unit is a subframe (the subframe may be composed of one or more time slots) or a time slot.

[0122] In the present disclosure, the frequency resolution (reporting granularity) and span (reporting bandwidth) of CSI reports may be defined in terms of frequency "sub-bands" and "CSI reporting bands" (CRBs), respectively.

[0123] The subband for CSI reporting is defined as a set of contiguous PRBs, which represents the smallest frequency unit for CSI reporting. For a given DL system bandwidth value, the number of PRBs in a subband can be fixed, semi-statically configured via higher layer / RRC signaling, or dynamically configured via L1 DL control signaling or MAC control element (MAC CE). The number of PRBs in a subband can be included in the CSI reporting settings.

[0124] "CSI reporting band" is defined as a set / aggregation of contiguous or non-contiguous subbands in which CSI reporting is performed. For example, a CSI reporting band may include all subbands within the DL system bandwidth. This may also be referred to as "full band". Alternatively, a CSI reporting band may include only a set of subbands within the DL system bandwidth. This may also be referred to as "partial band".

[0125] The term "CSI reporting band" is used only as an example to indicate the functionality. Other terms such as "CSI reporting subband set" or "CSI reporting bandwidth" may also be used.

[0126] In terms of UE configuration, at least one CSI reporting band can be configured for the UE. This configuration can be semi-static (via high-layer signaling or RRC) or dynamic (via MAC CE or L1 DL control signaling). When multiple (N) CSI reporting bands are configured (for example, via RRC signaling), the UE can report CSI associated with n≤N CSI reporting bands. For example, >6GHz, larger system bandwidths may require multiple CSI reporting bands. The value of n can be configured semi-statically (via high-layer signaling or RRC) or dynamically (via MAC CE or L1 DL control signaling). Alternatively, the UE can report a recommended n value via the UL channel.

[0127] Therefore, the CSI parameter frequency granularity can be defined according to the CSI reporting frequency band as follows. n When there are multiple subbands, the CSI parameters are configured to include M n When the CSI reporting frequency band is M, the n When one CSI parameter is reported for each of the subbands, the CSI parameter is configured to have a n The CSI reporting frequency band for each sub-band is the “sub-band” of the frequency band.

[0128] Fig.12 An exemplary antenna port layout 1200 is shown according to an embodiment of the present disclosure. Fig.12 The illustrated embodiment of antenna port layout 1200 is for illustration only. Fig.12 The scope of the present disclosure is not limited to any particular implementation of the antenna port layout.

[0129] like Fig.12 As shown, N 1 and N 2 are the number of antenna ports with the same polarization in the first dimension and the second dimension, respectively. For a 2D antenna port layout, N 1 >1, N 2 >1; and for 1D antenna port layout, N 1 >1 and N 2 = 1. Therefore, for the dual-polarized antenna port layout, when each antenna is mapped to an antenna port, the total number of antenna ports is 2N 1 N 2 . Fig.12, where "X" represents two antenna polarizations. In this disclosure, the term "polarization" refers to a set of antenna ports. For example, antenna ports comprising a first antenna polarization, and an antenna port Including the second antenna polarization, where P CSIRS is the number of CSI-RS antenna ports, and X is the starting antenna port number (eg, X=3000, then the antenna ports are 3000, 3001, 3002, ...).

[0130] As described in U.S. Patent No. 10,659,118, issued on May 19, 2020 and entitled “Method and Apparatus for Explicit CSI Reporting in Advanced Wireless Communication Systems,” which is incorporated herein by reference in its entirety, a UE is configured with high-resolution (e.g., Type II) CSI reporting, wherein a linear combination-based Type IICSI reporting framework is extended to include a frequency dimension in addition to a first antenna port dimension and a second antenna port dimension.

[0131] Fig.13 A 3D grid of oversampled DFT beams 1300 is shown in accordance with an embodiment of the present disclosure. Fig.13 The illustrated embodiment of the 3D grid of oversampled DFT beams 1300 is for illustration only. Fig.13 The scope of the present disclosure is not limited to any particular implementation of the 3D grid of oversampled DFT beams.

[0132] As shown in the figure, Fig.13 A 3D grid 1300 (first port dimension, second port dimension, frequency dimension) of an oversampled DFT beam is shown, where

[0133] The first dimension is associated with the first port dimension,

[0134] The second dimension is associated with the second port dimension, and

[0135] The third dimension is associated with the frequency dimension.

[0136] The base sets represented by the first port domain and the second port domain are respectively of length N 1 and length N 2 And the oversampling factors are O 1 and O 2 Similarly, the basis set of the frequency domain representation (i.e., the third dimension) is a length N 3And the oversampling factor is O 3 In one example, O 1 =O 2 =O 3 =4. In one example, O 1 =O 2 =4 and O 3 =1. In another example, the oversampling factor O i belongs to {2, 4, 8}. In yet another example, O 1 , O 2 and O 3 At least one of them is configured by a higher layer (via RRC signaling).

[0137] As explained in section 5.2.2.2.6 of REF8, the UE is configured with the higher layer parameter CodebookType set to "typeII-PortSelection-r16" for enhanced type II CSI reporting, where the precoder for all SBs and a given layer l=1,..,v (where v is the associated RI value) is given by:

[0138]

[0139] or

[0140]

[0141] in:

[0142] N 1 is the number of antenna ports (with the same antenna polarization) in the first antenna port dimension,

[0143] N 2 is the number of antenna ports (with the same antenna polarization) in the second antenna port dimension,

[0144] P CSI-RS is the number of CSI-RS ports configured for the UE,

[0145] N 3 is the number of SBs used for PMI reporting or the number of FD units or the number of FD components (which include the CSI reporting band) or the total number of precoding matrices indicated by PMI (one precoding matrix per FD unit / component),

[0146] a i It is 2N 1 N 2 ×1 (Equation 1) or N 1 N 2×1 (Equation 2) column vector, and if the antenna ports at the gNB are co-polarized, then a i N 1 N 2 ×1 port selection column vector, and 2N if the antenna ports at the gNB are dual-polarized or cross-polarized 1 N 2 ×1 port selection column vector, where a port selection vector is defined as a vector containing the value 1 in one element and the values ​​0 in the other elements,

[0147] b f YesN 3 ×1 column vector,

[0148] c l,i,f is a complex coefficient.

[0149] In a variation, when the UE reports a subset K < 2LM coefficients (where K is fixed, configured by the gNB, or reported by the UE), then the coefficient c in Equation 1 or Equation 2 of the precoder equation is l,i,f is replaced by x l,i,f ×c l,i,f ,in:

[0150] According to some embodiments of the present disclosure, if the coefficient c l,i,f is reported by the UE, then x l,i,f =1.

[0151] Otherwise (i.e., c l,i,f Not reported by UE), x l,i,f =0.

[0152] x l,i,f = 1 or 0 is in accordance with some embodiments of the present disclosure. For example, it may be via a bitmap.

[0153] In a variation, the precoder equations of Eq. 1 or Eq. 2 are generalized to

[0154]

[0155] as well as

[0156]

[0157] where for a given i, the number of basis vectors is M i And the corresponding basis vectors are {b i,f}. It should be noted that M i is the coefficient c reported by the UE for a given i l,i,f The number of i ≤M(where {M i} or ∑Mi is fixed, configured by the gNB, or reported by the UE).

[0158] W l The columns of are normalized to norm 1. For rank R or R layers (v = R), the precoding matrix is ​​given by Given. In the rest of the present disclosure, Equation 2 is assumed. However, the embodiments of the present disclosure are general and also apply to Equation 1, Equation 3, and Equation 4.

[0159] here, And M≤N 3 .if Then A is the identity matrix and is therefore not reported. Similarly, if M = N 3 , then B is the identity matrix and is not reported. In the example, it is assumed that M <N 3 , to report the columns of B, an oversampled DFT codebook is used. For example, b f =w f , where the quantity w f Given by:

[0160]

[0161] When O 3 = 1, the FD basis vectors for layer l∈{1,..,v} (where v is the RI or rank value) are given by

[0162] {0,1,…,N 3 -1}.

[0163] In another example, a discrete cosine transform DCT basis is used to construct / report a basis B in the third dimension. The mth column of the DCT compression matrix is ​​simply given by

[0164] And K = N 3 and m=0,…,N 3 -1.

[0165] Since DCT is applied to real-valued coefficients, DCT is applied to the real and imaginary components (of the channel or channel eigenvectors) respectively. Alternatively, DCT is applied to the amplitude and phase components (of the channel or channel eigenvectors) respectively. The use of DFT or DCT basis is for illustration purposes only. The present disclosure is applicable to any other basis vectors for constructing / reporting A and B.

[0166] At a high level, the precoder W l It can be described as follows.

[0167]

[0168] Where A=W 1 Corresponds to version 15W in Type II CSI codebook [REF8] 1 , and B=W f .

[0169] The matrix consists of all necessary linear combination coefficients (eg amplitude and phase or real or imaginary part). Each reported coefficient (c l,i,f =p l,i,f φ l,i,f ) is quantized as an amplitude coefficient (p l,i,f ) and phase coefficient (φ l,i,f ).

[0170] The above framework (Equation 5) represents the 2L SD beams and M v Multiple (N) FD beams using linear combination (double summation) 3 This framework can also be used to convert the FD basis matrix W f Replaced by TD basis matrix W t To represent the precoding matrix in the domain (TD), where W t The columns include M representing some form of delay or channel tap position. v TD beams. Therefore, the precoder W l It can be described as follows.

[0171]

[0172] In one example, M v The TD beams (denoting delay or channel tap positions) are selected from a set of N 3 TD beams are selected, that is, N 3 Corresponds to a maximum number of TD units, where each TD unit corresponds to a delay or channel tap position. In one example, the TD beam corresponds to a single delay or channel tap position. In another example, the TD beam corresponds to multiple delays or channel tap positions. In another example, the TD beam corresponds to a combination of multiple delays or channel tap positions.

[0173] The above framework for CSI reporting based on the spatial frequency compression (Equation 5) or spatial time compression (Equation 5A) framework can be extended to the Doppler domain (e.g., for medium and high mobility UEs). The present disclosure focuses on CS-RS bursts that can be used to obtain the Doppler component of a channel, which can be used to perform Doppler domain (DD) compression. Specifically, the present disclosure provides embodiments regarding the granularity or units of components across which DD compression is performed, where each component corresponds to one or more time instances within a CSI-RS burst or across multiple CSI-RS bursts.

[0174] Fig.14 An example of a UE configured to receive a burst of non-zero power (NZP) CSI-RS resources 1400 according to an embodiment of the present disclosure is shown. Fig.14 The example embodiment of a UE configured to receive bursts of non-zero power (NZP) CSI-RS resources 1400 shown in FIGURE 1 is for illustration only. Fig.14 The scope of the present disclosure is not limited to any particular implementation of the example of a UE configured to receive bursts of non-zero power (NZP) CSI-RS resources.

[0175] In one embodiment, Fig.14 As shown, the UE is configured to receive a burst of non-zero power (NZP) CSI-RS resources within B time slots including the measurement window, referred to as a CSI-RS burst for simplicity, where B ≥ 1. The B time slots may correspond to at least one of the following examples.

[0176] In one example, the B time slots are evenly / equally spaced with an inter-slot spacing of d.

[0177] In one example, the B time slots may be unequally spaced, with an inter-slot spacing of e 1 =d 1 、e 2 =d 2 -d 1 、e 3 =d 3 -d 2 ...etc., where for at least one pair (i,j), e i ≠e j , where i≠j.

[0178] The UE receives a CSI-RS burst, estimates B instances of DL channel measurements, and uses the channel estimate to obtain the Doppler component of the DL channel. The CSI-RS burst may be linked to (or associated with) a single CSI report configuration (e.g., via a higher layer parameter CSI-ReportConfig), where the corresponding CSI report includes information about the Doppler component of the DL channel.

[0179] Let h t be the DL channel estimate based on the CSI-RS resources received in time slots t ∈ {0, 1, …, B−1}. When the DL channel estimate in time slot t is a matrix of size N Rx ×N Tx ×N Sc denoted as G t , then h t = vec(G t ), where N Rx , N Tx and N Sc are the number of receive (Rx) antennas at the UE, the number of CSI-RS ports measured by the UE, and the number of subcarriers in the frequency band of the CSI-RS burst, respectively. The symbol vec(X) is used to denote the vectorization operation, where the matrix X is converted into a vector by concatenating the elements of the matrix in order (e.g., 1 → 2 → 3 → etc.), which means the concatenation starts from the first dimension and then moves to the second dimension and continues until the last dimension. Let H B = [h 0 h 1 … h B-1 be the concatenated DL channel. The Doppler components of the DL channel can be obtained based on H B . For example, H B can be expressed as where Φ = [φ 0 φ 1 … φ N-1 is the Doppler domain (DD) basis matrix whose columns include basis vectors, C = [c 0 c 1 … c N-1 is the coefficient matrix whose columns include coefficient vectors, and N < B is the number of DD basis vectors. Since the columns of H B may be correlated, DD compression can be achieved when the value of N is small (compared to the value of B). In this example, the Doppler components of the channel are represented by the DD basis matrix Φ and the coefficient matrix C.

[0180] Fig.15 FIG. 1500 shows an example of a UE configured to determine the value of N 4 based on the value B in a CSI-RS burst. Fig.15 The embodiment of the UE example 1500 shown in FIG. 1500 configured to determine the value of N 4 based on the value B in a CSI-RS burst is for illustrative purposes only. Fig.15 It does not limit the scope of the present disclosure to any particular implementation of the UE example 1500 configured to determine the value of N 4 based on the value B in a CSI-RS burst.

[0181] Let N 4 is the basis vector {φ s}, for example, each basis vector is of length N 4 ×1 column vector.

[0182] In one embodiment, the UE is configured to determine N based on the value B (the number of CSI-RS instances) in the CSI-RS burst and the components across which DD compression is performed. 4 where each component corresponds to one or more time instances within a CSI-RS burst. 4 is fixed (e.g. N 4 = B), or is configured (e.g., via RRC or MAC CE or DCI), or reported by the UE (as part of the CSI report). In one example, the B CSI-RS instances can be divided into sub-time (ST) units (instances), where each ST unit is defined as (up to) N in a CSI-RS burst. ST In this example, the DD-compressed components correspond to ST units. Fig.15 Three examples of ST units are shown in FIG. 1 . In the first example, each ST unit includes N ST = 1 time instance. In the second example, each ST unit includes N in the CSI-RS burst ST =2 consecutive time instances. In the third example, each ST unit includes N in a CSI-RS burst. ST = 4 consecutive time instances.

[0183] N ST The value of can be fixed (for example, N ST =1 or 2 or 4) or indicated to the UE (e.g., via higher layer RRC or MACCE or DCI-based signaling) or reported by the UE (e.g., as part of CSI reporting). ST The value of (fixed or indicated or reported) may be affected by the UE capability report. ST The value of may also depend on the value of B (eg, one value of a range of values ​​of B and another value of another range of values ​​of B).

[0184] Fig.16 An example 1600 of a UE configured to divide resource blocks (RBs) into sub-bands and divide a time instance into sub-times according to an embodiment of the present disclosure is shown. Fig.16 The embodiment of example 1600 of a UE configured to divide resource blocks (RBs) into sub-bands and divide a time instance into sub-times shown in FIGURE 1 is for illustration only. Fig.16The scope of the present disclosure is not limited to any particular implementation of the example 1600 of a UE configured to divide resource blocks (RBs) into sub-bands and divide a time instance into sub-times.

[0185] In one embodiment, the UE is configured with J≥1 CSI-RS bursts (as shown earlier in this disclosure) occupying a frequency band and a time span (duration), where the frequency band (of the CSI-RS resources) includes A RBs and the time span includes B time instances. When J>1, the A RBs and / or B time instances can be aggregated across the J CSI-RS bursts. In one example, the frequency band (across the J CSI-RS bursts) is equal to the CSI reporting band, and the time span is equal to the number of CSI-RS resource instances, both of which can be configured to the UE for CSI reporting, which can be based on DD compression.

[0186] The UE is further configured to divide (split) the A RBs into subbands (SBs) and / or divide the B time instances into subtimes (STs). The division of the A RBs may be based on the SB size value N SB , which value can be configured to the UE (see Table 5.2.1.4-2 of REF8). The division of B time instances can be based on the ST size value N ST or r values, as described in the present disclosure (see Example B). Fig.16 An example is shown in FIG. 1 , where RB0, RB1, ..., RB A-1 Including A RB, T 0 ,T 1 ,…,T B-1 Including B time instances, SB size N SB =4 and ST size N ST =2.

[0187] In one embodiment, N 4 The value of depends on B. For example, N 4 =B or N 4 =B×R ST Where R ST ≥1(or R ST <1). Therefore, the DD basis matrix W d It includes N DD basis vectors {φ s}, each with length N 4×1. Here, N can be fixed or configured (e.g., via RRC, MAC CE, or DCI). Similarly, B can be fixed or configured (e.g., via RRC, MAC CE, or DCI). When configured, B can be based on the timing (slot index) of the deactivation and activation commands of the SP CSI-RS resources configured as CSI-RS bursts, as described in the present disclosure. When configured, B can be based on the measurement window of the periodic (P) CSI-RS resources configured as CSI-RS bursts, as described in the present disclosure.

[0188] In one example, the gNB / NW receives CSI feedback including a DD component, where the DD component includes a DD basis vector {φ s gNB / NW can use CSI feedback and predict (C = QN 4 ) precoding matrices for future time slots or DD units.

[0189] In one example, the gNB / NW determines / constructs the basis vector {b s}, each with length Q×1, where Q>N 4 In one example, Q = N 4 ×g, where g is the scaling factor, for example g=2.

[0190] In one example, when φ s is a DFT vector with index s, then b s It can also be a DFT vector, which can be calculated according to φ s to be sure.

[0191] In one example, φ s The entry can be repeated g times, for example, when g = 2, And the vector b s It can be length Q = gN 4 The closest DFT vector to , where the maximum inner product value can be based on a metric such as ) to determine the closest DFT vector.

[0192] In one example, b s =[φ s ,…φ s ](Repeat g times).

[0193] In one example, when g=Q / N 4 When b is an integer, s is the DFT vector with index sg-1.

[0194] In this example, the rest of the codebook components are the same as reported. For example, when the codebook structure is or And CSI report includes SD base 1 , FD base W f ,DD base W d and the coefficient matrix When the gNB / NW determines / constructs the Q precoder as or Where W d,pred is a DD basis vector containing N predictions {b s}'s predicted DD basis matrix.

[0195] In one example, the gNB / NW determines / builds and use it to determine / predict for (C = QN 4 ) future time slots or DD units W 2 Matrix. Let W 2,pred is the predicted W 2 Then, the gNB / NW determines / constructs the Q precoder as W 1 W 2,pred .

[0196] In one example, the gNB / NW determines / builds the precoder or and use it to determine / predict (C = QN 4 ) precoding matrices for future time slots or DD units.

[0197] In one embodiment, N 4 The value depends on B and C (or on B, C and N ST ),in

[0198] B = the number of CSI-RS measurement instances (time slots) including a CSI-RS burst configured for CSI reporting including the DD component,

[0199] C = number of additional time instances or future time slots or prediction windows, and

[0200] N ST is the TD / DD unit size as described above.

[0201] In one example, N 4 =T=B+C. In one example, N 4 =T×R ST , where R ST ≥1(or R ST <1).

[0202] In one example, In one example, N 4 =T 1 ×R ST, where R ST ≥1(or R ST <1).

[0203] In one example, In one example, N 4 =T 2 ×R ST , where R ST ≥1(or R ST <1).

[0204] In one example, In one example, N 4 =T 1 ×R ST , where R ST ≥1(or R ST <1).

[0205] In one example, or In one example, N 4 =T 2 ×R ST , where R ST ≥1(or R ST <1).

[0206] In one example, In one example, N 4 =T 1 ×R ST , where R ST ≥1(or R ST <1).

[0207] In one example, or In one example, N 4 =T 2 ×R ST , where R ST ≥1(or R ST <1).

[0208] In one example, no RS (eg, CSI-RS or TRS or SSB) is measured during C time slots (windows). In one example, there may be a RS (eg, CSI-RS or TRS or SSB) measured during C time slots (windows).

[0209] DD basis matrix W d Including DD basis vectors {φ s}, each with length N 4 ×1

[0210] In one example, the UE may not perform or need not perform any prediction (for C future time slots). The UE may perform the prediction based on the DL channel (H meas ) (measured via the CSI-RS burst configured for CSI reporting) and a portion (or subset of entries) of the DD basis vectors corresponding to the B CSI-RS measurements determine the DD basis vector {φ s}. Let φ s =[φ s,meas ,φ s,pred ] is the DD basis vector, where part φ s,meas corresponds to B CSI-RS measurements, and the other part φ s,pred corresponds to C future time slots. Then, φ s Can be based on φ s,meas and H meas For example, it can be determined based on a metric (e.g., maximum power or absolute value or maximum norm value). or ) to determine the DD basis vectors {φ s}.

[0211] In one example, the UE may use the DL channel (H) measured during B time slots. meas ) (measured via the CSI-RS burst configured for CSI reporting) to predict / infer the DL channel in C future time slots. The UE can then pred ) channel to determine the DD basis vector. In this case, it can be based on H agg =[H meas ,H pred ] to determine the DD basis vector φ s For example, the value of the maximum power or the absolute value or the maximum norm value can be used to or ) to determine the DD basis vectors {φ s}.

[0212] In one example, the UE may perform prediction based on the DFT / FFT basis vectors. For example, the DFT / IFFT basis vector F = [F 1 ,F 2 ] can be used to determine the prediction coefficient vector as x=F 1 H ×H meas , and then use x to predict the channel as H pred =x H ×F 2 .

[0213] The values ​​of B and C may be determined according to at least one of the following examples.

[0214] In one example, both B and C are fixed.

[0215] In one example, one of B and C is configured (e.g., via RRC, MAC CE, or DCI), and the other is fixed or determined based on a configuration value. For example, B can be configured, and C can be fixed (e.g., C=10) or determined based on B (e.g., C=B or C=t×B, and t can be fixed, e.g., 2).

[0216] In one example, both B and C are configured via two separate parameters or via a joint parameter (eg, via RRC, MAC CE, or DCI).

[0217] In one example, one of B and C is configured (eg, via RRC, MAC CE, or DCI) and the other is reported by the UE (eg, via UE capability report). For example, B may be configured and C may be reported.

[0218] When both B and C are provided (configured) to the UE, at least one of the following examples is used.

[0219] In one example, both are configured via the same medium, such as RRC, MAC CE, or DCI.

[0220] In one example, one of B and C is configured via RRC and the other is configured via MAC CE or DCI.

[0221] In one example, one of B and C is configured via MAC CE and the other is configured via DCI.

[0222] When B and / or C are configured via RRC, the configuration may be included in or as part of a higher-layer CSI-ResourceConfig or a higher-layer CSI-ReportConfig.

[0223] When B and / or C are configured via MAC CE, then the configuration may be included in or as part of a CSI triggering state that may be activated / deactivated via MAC CE.

[0224] When B and / or C are configured via DCI, then the configuration may be included in or as part of a CSI triggering state that may be triggered by DCI.

[0225] In one example, B and N 4 One or two of them are configured, and C is based on B, N 4 , e.g., C=N 4 -B to determine. B and N 4The value of can be determined according to at least one of the following examples.

[0226] In one example, B and N 4 They are all fixed.

[0227] In one example, B and N 4 One of B is configured (e.g., via RRC, MAC CE, or DCI), and the other is fixed or determined based on a configured value. For example, B may be configured, and N 4 Can be fixed (for example, N 4 = 10) or determined based on B (e.g., N 4 =t×B and t can be fixed, for example, 2).

[0228] In one example, B and N 4 Both are configured via two separate parameters or via a joint parameter (eg, via RRC, MAC CE or DCI).

[0229] In one example, B and N 4 One of B can be configured (e.g., via RRC, MAC CE, or DCI), and the other can be reported by the UE (e.g., via UE capability reporting). 4 Can be reported.

[0230] When B and N 4 When both are provided (configured) to the UE, at least one of the following examples is used.

[0231] In one example, both are configured via the same medium, such as RRC, MAC CE, or DCI.

[0232] In one example, B and N 4 One of them is configured via RRC, and the other is configured via MAC CE or DCI.

[0233] In one example, B and N 4 One of the two is configured via MAC CE and the other is configured via DCI.

[0234] When B and / or N 4 When configured via RRC, the configuration may be included in or be part of a higher-level CSI-ResourceConfig or a higher-level CSI-ReportConfig.

[0235] When B and / or N 4 When configured via MAC CE, the configuration may be included in or be part of a CSI triggering state that may be activated / deactivated via MAC CE.

[0236] When B and / or N 4 When configured via DCI, the configuration may be included in or as part of a CSI triggering state that may be triggered by DCI.

[0237] The UE is configured to determine / report a CSI report including a PMI, wherein the PMI indicates a SD basis vector, a FD basis vector, a DD basis vector, and coefficients associated with a triplet of (SD, FD, DD) basis vectors. The coefficient report may be similar to the Type II codebook of Release 16, i.e., indicating non-zero coefficients (e.g., via a bitmap), SCI, reference amplitude, amplitude and phase of the NZ coefficient.

[0238] The CSI report may also include a CQI, wherein the CQI report may be configured according to at least one of the following examples.

[0239] In one example, the CQI is reported using a measurement window or time instance (B) and a prediction or future time instance (C), i.e., T B+C .

[0240] In one example, only a measurement window or time instance (B) is used to report CQI, i.e., T B .

[0241] In one example, only the predicted or future time instance (C) is used to report the CQI, i.e., T C .

[0242] The number of CQIs reported in TD / DD may be configured according to at least one of the following examples.

[0243] In one example, for the entire T x The TD / DD unit reports only one CQI, where x belongs to {B, C, B+C}.

[0244] When the CQI report is WB on the SB, then for the CSI reporting band (across SBs) and time window T x Only one CQI is reported.

[0245] When the CQI report is per SB, a CQI is reported for each SB, and the reported value is for the time window T x Remain unchanged.

[0246] In one example, for the entire T x The TD / DD unit reports multiple CQIs, where x belongs to {B, C, B+C}. In one example, the number of CQIs = 2. In one example, the number of CQIs is N. 4 In one example, the number of CQIs is N 4+1 (where the addition of 1 is due to the reference CQI).

[0247] When CQI reporting is WB on SB, then the multiple CQIs remain unchanged for all SBs.

[0248] When the CQI report is per SB, multiple CQIs are reported for each SB.

[0249] The CSI reference resource of the serving cell is defined as follows:

[0250] - In the frequency domain, the CSI reference resources are defined by the downlink physical resource block groups corresponding to the frequency band to which the derived CSI is related.

[0251] - In the time domain, the CSI reference resources for the CSI report in uplink time slot n' consist of a single downlink time slot Definition, where K offset is a parameter configured by higher layers, as specified in clause 4.2 of [6TS38.213], and where It is for K offset The subcarrier spacing configuration has a value of 0 for frequency range 1,

[0252] -in And μ DL and μ UL are the subcarrier spacing configurations for DL ​​and UL, respectively, and and μ offset Determined by the ca-SlotOffset configured by higher layers for the cell transmitting uplink and downlink, as defined in clause 4.5 of [4, TS 38.211]

[0253] - For periodic and semi-persistent CSI reporting

[0254] - If a single CSI-RS / SSB resource is configured for channel measurement, nCSI_ref is greater than or equal to the minimum value of , so that it corresponds to a valid downlink time slot, or

[0255] - If multiple CSI-RS / SSB resources are configured for channel measurement, nCSI_ref is greater than or equal to The minimum value of , so that it corresponds to a valid downlink time slot.

[0256] -For aperiodic CSI reporting, if the UE is instructed by DCI to report CSI in the same timeslot as the CSI request, then nCSI_ref makes the reference resource and the corresponding CSI request in the same valid downlink timeslot, otherwise nCSI_ref is greater than or equal to such that time slot n-nCSI_ref corresponds to a valid downlink time slot, where Z' corresponds to the delay requirement as defined in clause 5.4.

[0257] - When using periodic or semi-persistent CSI-RS / CSI-IM or SSB for channel / interference measurement, the UE is expected not to measure the channel / interference on a CSI-RS / CSI-IM / SSB whose last OFDM symbol is received at most Z' symbols before the first OFDM symbol transmission time of the aperiodic CSI report.

[0258] A timeslot in a serving cell shall be considered as a valid downlink timeslot if the following conditions are met:

[0259] - it contains at least one downlink or flexible symbol configured by a higher layer, and

[0260] - It does not fall within the configured measurement gap for this UE

[0261] If there is no valid downlink timeslot for CSI reference resources corresponding to the CSI reporting configuration in the serving cell, CSI reporting is omitted for the serving cell in uplink timeslot n'.

[0262] After CSI reporting (re)configuration, serving cell activation, BWP change or activation of SP-CSI, the UE reports the CSI report only after receiving at least one CSI-RS transmission opportunity for channel measurement and CSI-RS and / or CSI-IM opportunity for interference measurement no later than the CSI reference resource, otherwise the report is discarded.

[0263] When DRX is configured, the UE reports the CSI report only when it receives at least one CSI-RS transmission opportunity for channel measurement and CSI-RS and / or CSI-IM opportunities for interference measurement no later than the CSI reference resource in the DRX active time, otherwise the report is discarded. When DRX is configured and the CSI-RS resource set for channel measurement corresponding to the CSI report is configured with two resource groups and N resource pairs, as described in clause 5.2.1.4.1, the UE reports the CSI report only when it receives at least one CSI-RS transmission opportunity for each CSI-RS resource in the resource pair no later than the CSI reference resource in the same DRX active time, otherwise the report is discarded. When the UE is configured to monitor DCI format 2_6, and if the UE is configured to report CSI via the higher layer parameter ps-TransmitOtherPeriodicCSI, where the higher layer parameter reportConfigType is set to "periodic", and reportQuantity is set to a quantity other than "cri-RSRP", "ssb-Index-RSRP", "cri-RSRP-Capability[Set]Index" and "ssb-Index-RSRP-Capability[Set]Index" (when drx-on DurationTimer is not started), if at least one CSI-RS transmission opportunity for channel measurement and CSI-RS and / or CSI-IM opportunity for interference measurement is received outside the DRX active time or no later than the CSI reference resource within the duration indicated by drx-onDurationTimer in DRX-Config, then the UE shall report CSI within the duration indicated by drx-onDurationTimer in DRX-Config (also outside the active time) according to the procedure described in clause 5.2.1.4, otherwise discard the report.When the UE is configured to monitor DCI format 2_6, and if the UE is configured to report L1-RSRP via the higher layer parameter ps-TransmitPeriodicL1-RSRP, where the higher layer parameter reportConfigType is set to "periodic", and reportQuantity is set to "cri-RSRP", "ssb-Index-RSRP", "cri-RSRP-Capability[Set]Index" or "ssb-Index-RSRP-Capability[Set]Index" (when drx-onDurationTimer is not started), and If at least one CSI-RS transmission opportunity for channel measurement is received outside the DRX active time or no later than the CSI reference resource within the DRX active time within the duration indicated by drx-onDurationTimer in DRX-Config, when reportQuantity is set to "cri-RSRP" or "cri-RSRP-Capability[Set]Index", the UE shall report L1-RSRP for the duration indicated by drx-onDurationTimer in DRX-Config also outside the active time according to the procedure described in clause 5.2.1.4, otherwise discard the report.

[0264] When deriving CSI feedback, the UE does not expect the NZP CSI-RS resources used for channel measurement to overlap with the CSI-IM resources used for interference measurement or the NZP CSI-RS resources used for interference measurement.

[0265] If configured to report a CQI index, then in the CSI reference resource the UE shall assume the following in order to derive the CQI index, and if also configured, the following in order to derive PMI and RI:

[0266] -The first 2 OFDM symbols are occupied by control signaling.

[0267] -The number of PDSCH and DM-RS symbols is equal to 12.

[0268] - The same bandwidth part subcarrier spacing is configured for PDSCH reception

[0269] - As configured for the bandwidth corresponding to the CQI report.

[0270] - Reference resource usage CP length and subcarrier spacing configured for PDSCH reception

[0271] - No resource elements are used by the primary synchronization signal or the secondary synchronization signal or the PBCH.

[0272] - Redundancy version 0.

[0273] - The ratio of PDSCH EPRE to CSI-RS EPRE is as given in clause 5.2.2.3.1.

[0274] - It is assumed that no REs are allocated for NZP CSI-RS and ZP CSI-RS.

[0275] - It is assumed that the number of front-loaded DM-RS symbols is the same as the maximum number of front-loaded symbols configured by the higher-layer parameter maxLength in DMRS-DownlinkConFig.

[0276] - It is assumed that the number of additional DM-RS symbols is the same as the number of additional symbols configured by the higher layer parameter dmrs-AdditionalPosition.

[0277] - It is assumed that the PDSCH symbol does not contain DM-RS.

[0278] -Assume that the PRB bundling size is 2PRB.

[0279] -PDSCH transmission scheme, where the UE may assume that PDSCH transmission will be performed with up to 8 transmission layers, as defined in clause 7.3.1.4 of [4, TS38.211]. For CQI calculation, the UE shall assume that the PDSCH signals on the antenna ports in the set of v layers [1000, ..., 1000+v-1] will produce signals equivalent to the corresponding symbols transmitted on antenna ports [3000, ..., 3000+P-1], as given by:

[0280]

[0281] where x(i) = [x (0) (i)...x (v-1) (i)] Tis a vector of layer-mapped PDSCH symbols as defined in clause 7.3.1.4 of [4, TS 38.211], P∈[1,2,4,8,12,16,24,32] is the number of CSI-RS ports. If only one CSI-RS port is configured, W(i) is 1. If the higher-layer parameter reportQuantity in the CSI-ReportConfig for reporting CQI is set to "cri-RI-PMI-CQI" or "cri-RI-LI-PMI-CQI", W(i) is the precoding matrix corresponding to the reported PMI applicable to x(i). If the higher-layer parameter reportQuantity in the CSI-ReportConfig for reporting CQI is set to "cri-RI-CQI", W(i) is the precoding matrix corresponding to the process in clause 5.2.1.4.2. If the higher-layer parameter reportQuantity in the CSI-ReportConfig reporting CQI is set to "cri-RI-i1-CQI", then W(i) is the precoding matrix for reported i1 corresponding to the procedure in clause 5.2.1.4.2. The corresponding PDSCH signal transmitted on antenna ports [3000, ..., 3000+P-1] has a ratio of EPRE to CSI-RS EPRE equal to the ratio given in clause 5.2.2.3.1. If the higher-layer parameter reportQuantity in the CSI-ReportConfig reporting CQI is set to "cri-RI-PMI-CQI" or "cri-RI-LI-PMI-CQI", then the corresponding CSI-RS resource set for channel measurement is configured with two resource groups and N resource pairs, as described in clause 5.2.1.4.1, the reported CRI corresponds to the entries of the N resource pairs, and the reported rank combination is {v 1 ,v 2}, as described in clause 5.2.1.4.2, for CQI calculation, the UE shall assume:

[0282] v 1 The set of layers [1000,…,1000+v 1 The PDSCH signal on the antenna port [3000,…,3000+P-1] of the first group of CSI-RS resources in the resource pair indicated by CRI will generate a signal equivalent to the corresponding symbol transmitted on the antenna port [3000,…,3000+P-1] of the first group of CSI-RS resources in the resource pair indicated by CRI, and v 2 The collection of layers [1000+v 1 ,…,1000+v 1 +v 2The PDSCH signal on the antenna port [3000,…,3000+P-1] of the second group of CSI-RS resources in the resource pair indicated by CRI will produce a signal equivalent to the corresponding symbol transmitted on the antenna port [3000,…,3000+P-1], which is given by:

[0283]

[0284] Where W j (i)(j=1,2) are two precoding matrices corresponding to two reported PMIs applicable to x(i), as described in clause 5.2.1.4.2; and index j=1,2 is associated with two resource groups configured for channel measurement in the corresponding CSI-RS resource set; signal y j (j=1,2) completely overlap in time and frequency, and for v j The calculation of RI, PMI and LI (if configured) of each layer (j=1,2) is derived from other v (j mod 2)+1 The interference of each layer is represented by the corresponding (j mod 2)+1 Channel measurement and precoding matrix derivation for each layer.

[0285] - The UE shall assume that v transmitted on the P antenna ports of the CSI-RS resources in group j j The corresponding PDSCH signal of each layer will have a ratio of EPRE to CSI-RS EPRE equal to the powerControlOffset of the corresponding CSI-RS resource (for j=1, 2).

[0286] Let n' be the UL timeslot index where CSI is reported. Let us first define four entities.

[0287] TD / DD basis vector length: Let N 4 is the length of the DD / TD basis vector. In one example, the N 4 Each of the N elements maps to or corresponds to a (time) slot. In one example, the N basis vectors 4 Each of the elements is mapped to or corresponds to a TD / DD (compression) unit.

[0288] Measurement window: Let the CSI-RS measurement window be expressed as [k, k+W meas ] or [k,k+W meas -1], which represents the window in which the CSI-RS burst is measured for computing the CSI report. Here, k is the (starting) time slot index, and W meas is the measurement window length. In one example, W measThe unit of W is (time) slot. In one example, W meas The unit is TD / DD (compressed) unit.

[0289] Reporting / validity window: Let the CSI reporting (or validity) window be denoted as [l,l+W CSI ] or [l,l+W CSI -1], which represents the window in which the CSI report in slot n' is expected to be valid. Here, l is the (starting) slot index, and W CSI is the validity window length (in time slots). In one example, W meas The unit of W is (time) slot. In one example, W meas The unit is TD / DD (compressed) unit.

[0290] CSI reference resource: Let CSI reference resource (as in Release 15) be the resource in frequency and time domain used as a reference for the CQI requirement (10% BLER) associated with the CSI report in slot n′. Let the location of the CSI reference resource be denoted by n ref (time slot index).

[0291] In one example, each cell corresponds to (and includes) N ST consecutive time slots, where N ST is the TD / DD unit size. N ST The value of may be fixed or configured (eg, via RRC or MAC CE or DCI). In one example, each unit corresponds to (includes) R ST ×N ST consecutive time slots (or sub-time slots), where R ST ≥1 or <1. R ST The value of may be fixed or configured (eg, via RRC or MAC CE or DCI). The number of slots corresponding to each DD / TD basis vector = N 4 N ST .

[0292] In the following embodiments and examples, when the window size W meas When the unit is TD / DD (compressed) unit, the window size expressed in the number of time slots can be expressed by W meas N ST or W meas N ST R ST Given, where N ST is the TD / DD unit size and R ST As defined above. Similarly, when the window size W CSIWhen the unit is TD / DD (compressed) unit, the window size expressed in the number of time slots can be expressed by W CSI N ST or W CSI N ST R ST Given, where N ST is the TD / DD unit size and R ST As defined above. Therefore, W in the embodiments of the present disclosure meas and W CSI Can be replaced by W meas N ST or W meas N ST R ST and W CSI N ST or W CSI N ST R ST , in order to obtain the corresponding time slot number index.

[0293] In this disclosure, the relationship between the above four entities is discussed.

[0294] In the present disclosure, CSI reference resource slot n ref Defined in one or more embodiments herein.

[0295] Fig.17 An example 1700 of a UE configured to measure a CSI-RS burst within a measurement window based on NZP CSI-RS resources according to an embodiment of the present disclosure is shown.

[0296] refer to Fig.17 , Fig.17 The embodiment of example 1700 of a UE configured to measure a CSI-RS burst within a measurement window based on NZP CSI-RS resources shown in FIG. 1 is for illustration only. Fig.17 The scope of the present disclosure is not limited to any particular implementation of the example 1700 of a UE configured to measure a CSI-RS burst within a measurement window based on NZP CSI-RS resources.

[0297] In one embodiment, the UE is configured to measure CSI-RS bursts based on NZP CSI-RS resources within a measurement window, wherein the measurement window is according to at least one of the following examples.

[0298] In one example, if Fig.17 As shown in Example 1 in FIG. 1 , the starting time slot index k and the ending time slot index (k+W meas or k+W meas -1) no later than n ref .

[0299] In one example, the end slot index is fixed. In one example, the end slot index is fixed to n ref , that is, k+W meas =n ref or k+W meas -1=n ref In one example, the end slot index is fixed to the most recent, no later than n ref CSI-RS burst timing, that is, k+W meas =n ref -δ or k+W meas -1=n ref -δ, where δ ≥ 0 corresponds to the most recent, no later than n ref The minimum integer of CSI-RS burst timings.

[0300] In one example, the starting slot index k is fixed or configured (eg, RRC) or determined based on the configuration of the CSI-RS burst. When fixed, k may be determined by k=n ref -δ k Alternatively, k can be given by k = n′-δ k Here, δ k is fixed. When configuring, k can be k = n ref -α k Alternatively, k can be given by k = n′-α k Here, α k It is configured.

[0301] In one example, k and W meas All are fixed. Use an example from this article.

[0302] In one example, k and W meas are all configured (eg, via RRC).

[0303] In one example, if Fig.17 As shown in Example 2 in the example, the starting time slot index k of the measurement window is no later than n ref And the end slot index (k+W meas or k+W meas -1) can be in n ref After but before n′ (or not later than it).

[0304] In one example, the end slot index is fixed. In one example, the end slot index is fixed to n′, i.e., k+W meas =n′ or k+W meas -1=n'. In one example, the end slot index is fixed to n'-δ, i.e. k+W meas=n′-δ or k+W meas -1=n′-δ, where δ≥0.

[0305] In one example, the starting time slot index is fixed. In one example, the starting time slot index is fixed to n ref , that is, k = n ref In one example, the starting slot index is fixed to n ref +δ′, where δ′≥0.

[0306] In one example, k and W meas All are fixed. Use an example from this article.

[0307] In one example, k and W meas are all configured (eg, via RRC).

[0308] In one example, if Fig.17 As shown in Example 3 in FIG. 1 , the starting time slot index k and the ending time slot index (k+W meas or k+W meas -1) no earlier than n ref (or after it).

[0309] In one example, the starting time slot index is fixed. In one example, the starting time slot index is fixed to n ref , that is, k = n ref In one example, the starting time slot index is fixed to be the first (or earliest) (no earlier than n ref ) of the CSI-RS burst timing, that is, k = n ref -δ, where δ≥0 corresponds to the first (or earliest) (no earlier than n ref ) is the minimum integer of the CSI-RS burst timing.

[0310] In one example, the end slot index (k+W meas or k+W meas -1) is fixed or configured (e.g., RRC) or determined based on the configuration of the CSI-RS burst. When fixed, it can be given by n′. When fixed, it can be given by n ref +δ k Alternatively, it can be given by n′-δ k Here, δ k is fixed. When configured, it can be ref +α k Alternatively, it can be given by n′-α k Here, α k It is configured.

[0311] In one example, k and Wmeas All are fixed. Use an example from this article.

[0312] In one example, k and W meas are all configured (eg, via RRC).

[0313] In one embodiment, as described above, the UE is configured to measure NZP CSI-RS resource bursts or NZP CSI-RS opportunities or measurement windows [k, k+W meas -1], where k≤n ref And n ref is the time slot index of the CSI reference resource.

[0314] If the higher layer parameter timeRestrictionForChannelMeasurements is set to "notConfigured", the UE shall derive channel measurements for computing the CSI value reported in uplink timeslot n only based on the NZP CSI-RS associated with the CSI resource configuration that is not later than the CSI reference resource (defined in TS 38.211 [4]).

[0315] If the higher-layer parameter timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "Configured", the UE shall derive channel measurements for computing the CSI reported in uplink timeslot n only based on the timing of the most recent NZP CSI-RS (defined in [4, TS 38.211]) associated with the CSI resource setting that is no later than the CSI reference resource.

[0316] If the higher layer parameter timeRestrictionForInterferenceMeasurements is set to "notConfigured", the UE shall derive interference measurements for calculating the CSI value reported in uplink timeslot n only based on the CSI-IM and / or NZP CSI-RS for interference measurement associated with the CSI resource configuration that is not later than the CSI reference resource.

[0317] If the higher-layer parameter timeRestrictionForInterferenceMeasurements in CSI-ReportConfig is set to "Configured", the UE shall derive the interference measurement for calculating the CSI value reported in uplink timeslot n based on the timing of the most recent CSI-IM and / or NZP CSI-RS for interference measurement (defined in [4, TS 38.211]) associated with the CSI resource setting that is no later than the CSI reference resource.

[0318] About k and / or W meas At least one of the following examples is used / configured.

[0319] In one example, when the time limit is on, W meas = 1, and when the time limit is off, W meas ≥ 1 (depending on UE implementation). In one example, the time restriction is turned on / off via the higher layer parameter timeRestrictionForChannelMeasurements (e.g., can be provided via CSI-ReportConfig). In one example, the time restriction is turned on / off for W only when the CSI report is based on a codebook other than a Type II codebook including a Doppler component such as DD basis vectors (which can be configured for high-speed UE scenarios). meas Use / configure this example. For example, the codebook can be a Type II codebook of Release 15 / 16 / 17, but the codebook cannot be a Type II codebook of Release 18 (including Doppler component). In one example, only when CSI reporting is configured for low-speed UEs, meas Use / configure this example.

[0320] In one example, if the high-level parameter timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "Configured",

[0321] For codebooks that do not include a Doppler component, such as the NR type II codebook of Release 15 / 16 / 17, the UE shall only calculate the Doppler signal based on the most recent CSI reference resource slot n that is no later than ref The timing of the NZP CSI-RS (defined in [4, TS38.211]) associated with the CSI resource setting (i.e., W meas =1) to derive channel measurements for computing the CSI reported in uplink timeslot n.

[0322] For codebooks that include a Doppler component, such as the Release-18 NR Type II codebook (for time / Doppler compression), the UE shall only use the latest CSI reference resource slot n that is no later than ref The measurement window (i.e., W) of the timing of the NZP CSI-RS (defined in [4, TS 38.211]) associated with the CSI resource setting meas >1) to obtain the channel measurement value for calculating the CSI reported in uplink time slot n. Here, W meas It may be fixed or configured (eg, via parameters associated with CSI resource settings or CSI reporting settings).

[0323] In one example, if the high-level parameter timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "notConfigured",

[0324] For codebooks that do not include a Doppler component, such as NR type II codebooks of Release 15 / 16 / 17, the UE shall derive channel measurements based only on the NZP CSI-RS associated with the CSI resource setting that is no later than the CSI reference resource (defined in [4, TS 38.211]) for computing the CSI reported in uplink slot n, i.e., depending on the UE implementation W meas =1 or >1.

[0325] For codebooks that include a Doppler component, such as the Release-18 NR Type II codebook (for time / Doppler compression), the UE shall only use the CSI reference resource slot n associated with the CSI resource configuration no later than ref The NZP CSI-RS measurement window (defined in [4, TS 38.211]) is used to derive the channel measurement value for calculating the CSI reported in uplink time slot n, that is, W meas >1. Here, W meas It may be fixed or configured (eg, via parameters associated with CSI resource settings or CSI reporting settings).

[0326] In one example, k≤n ref .

[0327] For codebooks that do not include a Doppler component, such as the NR II codebooks of Release 15 / 16 / 17, k and W meas The value depends on the gNB and / or UE implementation, i.e., neither is specified.

[0328] For codebooks that include a Doppler component, such as the Release-18 NR Type II codebook (for time / Doppler compression),

[0329] In one example, the k value is fixed or configured, and W meas Value depends on the gNB and / or UE implementation, i.e., unspecified.

[0330] In one example, W meas The value is either fixed or configured and the value of k depends on the gNB and / or UE implementation, i.e. it is unspecified.

[0331] In one example, specifying k and W meas The value of Both, either both are fixed, both are configurable, or one of the two is fixed and the other is configurable.

[0332] Based on legacy (NR Release 15 specifications), CSI is expected to be invalid in slots after n'. However, the validity of CSI including DD / TD components based on CSI-RS burst measurements may need to be defined differently (from the legacy definition) since the reported CSI may be expected to be valid in future slots where the gNB / NW may schedule DL transmissions. Some examples of potential enhancements to the validity window are provided below.

[0333] In one embodiment, the UE is configured to determine a CSI report that is valid during a CSI reporting / validity window, as defined above, wherein the CSI reporting / validity window is according to at least one of the following examples.

[0334] Fig.18 An example 1800 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window according to an embodiment of the present disclosure is shown. Fig.18 The embodiment of the example 1800 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window shown in FIGURE 18 is for illustration only. Fig.18 The scope of the present disclosure is not limited to any particular implementation of the example 1800 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window.

[0335] In one example, if Fig.18 As shown in Example 1 in , the CSI reporting / validity window is the same as the measurement window. Therefore, l = k and W meas =W CSI In this case, the CSI report / window is based on an example in this article.

[0336] In one example, if Fig.18 As shown in Example 2 in FIG. 1 , the CSI reporting / validity window includes a measurement window and a non-measurement window [m,m+W] where no CSI-RS resources are used for measurement. non-measor [m, m + W non-meas - 1]. In one example, l = k, k + W meas < m and W CSI = W non-meas . In one example, the non - measurement window is included in [n ref , n′]. In one example, the non - measurement window is included in [n ref , n f , where n′ < n f . In one example, the non - measurement window is included in [n′, n f , where n′ < n f . In one example, the non - measurement window refers to the time slots in which the UE is expected to perform channel or CSI prediction. In one example, the non - measurement window is a prediction window in which the UE is expected to perform prediction (e.g., prediction of the channel based on the CSI - RS measured in the measurement window) in order to calculate the CSI. In one example, it is expected that the UE will start or predict the channel / CSI after a time slot with a "new" reference resource definition (i.e., l ≥ n ref ), where the position of the "new" CSI reference resource is configured by the gNB via higher - layer signaling (from multiple candidate values), or indicated by the code point of the MAC CE activation command, or indicated by the code point of the DCI (e.g., it can be included in the CSI request field triggered by the DCI). The set of candidate values for the start of the CSI reference resource position (l) includes the traditional time slot positions (n ref ) and the CSI reporting time slot n′.

[0337] In one example, as shown in Example 3 of Fig.18 , the CSI reporting / validity window is the non - measurement window [m, m + W non-meas or [m, m + W non-meas - 1], where there is no CSI - RS resource for measurement. Thus, k + W meas < m. In one example, the non - measurement window is between [n ref , n′]. In one example, the non - measurement window is between [n ref , n f , where n′ < n f . In one example, the non - measurement window is included in [n′, n f , where n′ < n f. In one example, a non-measurement window refers to a time slot in which the UE is expected to perform channel or CSI prediction. In one example, the non-measurement window is a prediction window in which the UE is expected to perform prediction (e.g., prediction of the channel based on the CSI-RS measured in the measurement window) in order to calculate the CSI. In one example, it is expected that the UE will start predicting the channel / CSI from or after a time slot with a "new" reference resource definition (i.e., l ≥ n ref ), where the position of the "new" CSI reference resource is configured by the gNB via higher layer signaling (from multiple candidate values), or indicated by the code point of the MAC CE activation command, or indicated by the code point of the DCI (e.g., it may be included in the CSI request field triggered by the DCI). The set of candidate values for the start of the CSI reference resource position (l) includes the legacy time slot position (n ref ) and the CSI reporting time slot n'.

[0338] Fig.19 FIG. 1900 shows an example of a UE configured to determine a CSI report valid during a CSI reporting / validity window according to an embodiment of the present disclosure. Fig.19 The embodiment of the UE shown in FIG. 1900 configured to determine a CSI report valid during a CSI reporting / validity window is for illustrative purposes only. Fig.19 It does not limit the scope of the present disclosure to any particular implementation of the UE shown in FIG. 1900 configured to determine a CSI report valid during a CSI reporting / validity window.

[0339] In one example, as shown in Example 1 in Fig.19 , the CSI reporting / validity window is within the window [n ref , n'], i.e., l > n ref and l + W CSI < n' or l + W CSI - 1 < n'.

[0340] In one example, as shown in Example 2 in Fig.19 , the CSI reporting / validity window is such that its start index l = n ref and the end index is before n', i.e., l + W CSI < n' or l + W CSI - 1 < n'.

[0341] In one example, as shown in Example 3 in Fig.19 , the CSI reporting / validity window is such that its start index is before n ref , i.e., l < n ref , and the end index is before n', i.e., l + W CSI < n' or l + W CSI - 1 < n'.

[0342] In these examples, the UE is expected to perform channel or CSI prediction in time slots without CSI-RS measurements.

[0343] Fig. 20 An example 2000 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window according to an embodiment of the present disclosure is shown. Fig. 20 The embodiment of the example 2000 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window shown in FIGURE 2 is for illustration only. Fig. 20 The scope of the present disclosure is not limited to any particular implementation of the example 2000 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window.

[0344] In one example, if Fig. 20 As shown in Example 1 in FIG. 1 , the CSI reporting / validity window is such that its starting index is located at n ref After that, l>n ref , and the end index is at n′, i.e. l+W CSI =n′ or l+W CSI -1=n′.

[0345] In one example, if Fig. 20 As shown in Example 2 in FIG. 1 , the CSI reporting / validity window has its starting index at n ref At, that is, l = n ref , and the end index is at n′, i.e. l+W CSI =n′ or l+W CSI -1=n′.

[0346] In one example, if Fig. 20 As shown in Example 3 in FIG. 1 , the CSI reporting / validity window is such that its starting index is located at n ref Before, that is, <n ref , and the end index is at n′, i.e. l+W CSI =n′ or l+W CSI -1=n′.

[0347] In these examples, the UE is expected to perform channel or CSI prediction in time slots without CSI-RS measurements.

[0348] Fig.21 An example 2100 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window according to an embodiment of the present disclosure is shown. Fig.21The embodiment of the example 2100 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window shown in FIGURE 2 is for illustration only. Fig.21 The scope of the present disclosure is not limited to any particular implementation of the example 2100 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window.

[0349] In one example, if Fig.21 As shown in Example 1 in FIG. 1 , the CSI reporting / validity window is such that its starting index is located at n ref After that, l>n ref , and the end index is in the future time slot n f >n′, that is, l+W CSI =n f or l+W CSI -1=n f .

[0350] In one example, n′>l>n ref , i.e. in this case the UE is expected to "predict" the channel / CSI after the time slot with the reference resource.

[0351] In one example, l>n′, i.e., in this case, the UE is expected to “predict” the channel / CSI after time slot n′ (where the CSI is reported).

[0352] In one example, l≥n', i.e. in this case, the UE is expected to "predict" the channel / CSI after time slot n' (where CSI is reported) (with or without).

[0353] In one example, l=n′, i.e., in this case, the UE expects to start from time slot n′ (where the CSI is reported) until the future time slot n f So far, the channel / CSI is “predicted”.

[0354] In one example, l>n′ or l≥n′, where l is fixed, or configured (eg, RRC) or provided via MAC CE or DCI based signaling.

[0355] In one example, l=n′+D, where D is fixed, or configured (eg, RRC) or provided via MAC CE or DCI based signaling. In one example, D≥0. In one example, D is the scheduling delay. In one example, D=4.

[0356] In one example, n f is fixed. In one example, n fis configured (e.g., RRC) or provided via MACCE or DCI based signaling. In one example, n f Based on the starting time slot l and W CSI In one example, n f Based on the starting time slot l and N 4 In one example, n f Based on the starting time slot l, N 4 and W CSI to be sure.

[0357] In one example, if Fig.21 As shown in Example 2 in FIG. 1 , the CSI reporting / validity window has its starting index at n ref At, that is, l = n ref , and the end index is in the future time slot n f >n′, that is, l+W CSI =n f or l+W CSI -1=n f In one example, n f Based on the starting time slot l and W CSI In one example, n f Based on the starting time slot l and N 4 In one example, n f Based on the starting time slot l, N 4 and W CSI to be sure.

[0358] In one example, if Fig.21 As shown in Example 3 in FIG. 1 , the CSI reporting / validity window is such that its starting index is located at n ref Before, that is, <n ref , and the end index is in the future time slot n f >n′, i.e. l+W CSI =n f or l+W CSI -1=n f In one example, n f Based on the starting time slot l and W CSI In one example, n f Based on the starting time slot l and N 4 In one example, n f Based on the starting time slot l, N 4 and W CSI to be sure.

[0359] In one or more examples herein, the CSI reporting / validity window spans from time slot l to time slot n. f, which is the time slot after n′ (in which CSI is reported). f is a future time slot index, so the reported CSI is expected to be valid for future time slots. To determine such CSI reporting, the UE may perform CSI prediction or inference for future time slots.

[0360] In one example, when the TD / DD basis vectors can provide some inherent prediction / inference capability beyond n' (without UE trying), it may not be necessary to include future time slots (up to n) in the CSI reporting window. f ). Otherwise, the UE may need to perform prediction / inference to ensure that time slot n f The BLER requirement at . is 10%.

[0361] In one example, n f =n′+Δ.

[0362] In one example, Δ=(n′-n ref )×s, where s≥0. In one example, s is fixed, for example, s=1. In one example, s is configured from a set S (eg, via RRC), for example, S={0,1} or {1,2} or {0,1,2}.

[0363] In one example, n f =n ref +Δ.

[0364] In one example, Δ=(n′-n ref )×s, where s≥1. In one example, s is fixed, for example, s=2. In one example, s is configured from a set S (eg, via RRC), for example, S={1,2} or {2,3} or {1,2,3}.

[0365] In one example, n f = x + Δ, where x is the value of the starting time slot with the "new" reference resource (l ≥ n ref ), where the (starting) position of the “new” CSI reference resource is configured by the gNB via higher layer signaling (from multiple candidate values), or via a codepoint indication in a MAC CE activation command, or via a codepoint indication in a DCI (e.g., it may be included in a CSI request field triggered via DCI). The set of candidate values ​​starting from the CSI reference resource position (l) includes the legacy slot positions (n ref ) and CSI reporting time slot n′.

[0366] In one example, Δ=(n′-n ref)×s, where s≥1. In one example, s is fixed, for example, s=2. In one example, s is configured from a set S (eg, via RRC), for example, S={1,2} or {2,3} or {1,2,3}.

[0367] Fig. 22 An example 2200 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window according to an embodiment of the present disclosure is shown. Fig. 22 The embodiment of the example 2200 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window shown in FIGURE 22 is for illustration only. Fig. 22 The scope of the present disclosure is not limited to any particular implementation of the example 2200 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window.

[0368] In one example, if Fig. 22 As shown in Example 1 in FIG. 1 , the CSI reporting / validity window has its starting index at n ref After that, l>n ref , and the end index is at time slot n f The second (or future) CSI reference resource at f >n′, i.e. l+W CSI =n f or l+W CSI -1=n f .

[0369] In one example, n′>l>n ref , i.e. in this case the UE is expected to "predict" the channel / CSI after the time slot with the reference resource.

[0370] In one example, l>n′, i.e., in this case, the UE is expected to “predict” the channel / CSI after time slot n′ (where the CSI is reported).

[0371] In one example, l≥n', i.e. in this case, the UE is expected to "predict" the channel / CSI after time slot n' (where CSI is reported) (with or without).

[0372] In one example, l=n′, i.e., in this case, the UE expects to start from time slot n′ (where the CSI is reported) until the future time slot n f So far, the channel / CSI is “predicted”.

[0373] In one example, l>n′ or l≥n′, where l is fixed, or configured (eg, RRC) or provided via MAC CE or DCI based signaling.

[0374] In one example, l=n′+D, where D is fixed, or configured (eg, RRC) or provided via MAC CE or DCI based signaling. In one example, D≥0. In one example, D is the scheduling delay. In one example, D=4.

[0375] In one example, n f is fixed. In one example, n f is configured (e.g., RRC) or provided via MACCE or DCI-based signaling configuration. In one example, n f Based on the starting time slot l and W CSI In one example, n f Based on the starting time slot l and N 4 In one example, n f Based on the starting time slot l, N 4 and W CSI to be sure.

[0376] In one example, if Fig. 22 As shown in Example 2 in FIG. 1 , the CSI reporting / validity window has its starting index at n ref At, that is, l = n ref , and the end index is at time slot n f The second (or future) CSI reference resource at f >n′, i.e. l+W CSI =n f or l+W CSI -1=n f In one example, n f Based on the starting time slot l and W CSI In one example, n f Based on the starting time slot l and N 4 In one example, n f Based on the starting time slot l, N 4 and W CSI to be sure.

[0377] In one example, if Fig. 22 As shown in Example 3 in FIG. 1 , the CSI reporting / validity window is such that its starting index is located at n ref Before, that is, <n ref , and the end index is at time slot n f The second (or future) CSI reference resource at f >n′, i.e. l+W CSI =n f or l+W CSI -1=n fIn one example, n f Based on the starting time slot l and W CSI In one example, n f Based on the starting time slot l and N 4 In one example, n f Based on the starting time slot l, N 4 and W CSI to be sure.

[0378] In one or more examples of this document, there are two CSI reference resources, the first CSI reference resource is located in time slot n ref The same tradition as described above is followed at , and the second CSI reference resource is defined in the future time slot n f The two CSI reference resources define a CSI reporting window. For example, the CSI reporting / validity window may span up to the second CSI reference resource. The frequency domain position of the second CSI reference resource may be the same as the first CSI reference resource.

[0379] In one example, the UE is not intended to measure the NZP CSI-RS resource associated with the second CSI reference resource. In one example, the UE may measure the NZP CSI-RS resource associated with the second CSI reference resource. In one example, information is provided to the UE (configured) as to whether the UE measures the NZP CSI-RS resource associated with the second CSI reference resource.

[0380] In one example, the UE is configured to report two CQI values ​​associated with two CSI reference resources (in a TD across a CSI reporting window). The first CQI may be in the window [a 1 ,b 1 ] is valid in the window [a 2 ,b 2 ] is valid.

[0381] In one example, a 1 <n ref And b 1 =n ref , and a 2 =n ref And b 2 =n f .

[0382] In one example, a 1 =n ref And b 1 =n f , and a 2 =n f And b 2 >n f.

[0383] When the frequency domain granularity of the CQI report is WB, two WB CQI values ​​are reported. When the frequency domain granularity of the CQI report is SB, two WB CQI values ​​and 2N are reported. SB CQI values ​​(one for each CB).

[0384] In one example, the CSI reporting / validity window is fixed. For example, using an example from this article.

[0385] In one example, the CSI reporting / validity window is configured (eg, via RRC or MAC CE or DCI). For example, multiple CSI reporting windows are supported and the UE is configured with one of the supported windows. In one example, two CSI reporting windows are supported.

[0386] In one example, two CSI reporting windows are based on n f For example, the first window is based on the value n f = n', and the second window is based on the value n f , so that n f >n'. In one example, the first window spans up to n' (as in the tradition). In one example, the second window is according to an example herein.

[0387] In one example, two CSI reporting windows are based on the number of CSI reference resources. For example, the first window is used when the number of CSI reference resources = 1, and the second window is used when the number of CSI reference resources = 2. In one example, the first window spans up to n' (as in tradition). In one example, the second window is according to an example of this article.

[0388] In one example, the two CSI reporting windows are based on the value of the starting time slot with the “new” reference resource (l ≥ n ref ), where the (starting) position of the “new” CSI reference resource is configured by the gNB via higher layer signaling (from multiple candidate values), or via a codepoint indication in a MAC CE activation command, or via a codepoint indication in a DCI (e.g., it may be included in a CSI request field triggered via DCI). The set of candidate values ​​starting from the CSI reference resource position (l) includes the legacy slot positions (n ref ) and CSI reporting time slot n′.

[0389] In one example, based on having a “new” reference resource (l≥n ref), where the (starting) position of the "new" CSI reference resource is configured by the gNB via higher layer signaling (from multiple candidate values), or via a codepoint indication in a MAC CE activation command, or via a codepoint indication in a DCI (e.g., it may be included in a CSI request field triggered via DCI). The set of candidate values ​​starting with the CSI reference resource position (l) includes the legacy slot position (n ref ) and CSI reporting time slot n′.

[0390] In one embodiment, the UE is configured with a CSI reporting / validity window [l,l+W as described above. CSI -1]. About W CSI Use / configure at least one of the following examples.

[0391] In one example, l=n ref And W CSI =1, and n ref is the time slot index of the CSI reference resource. That is, the CSI reporting / validity window contains only one time slot, namely the CSI reference resource time slot. In one example, this example is used / configured for the CSI reporting window only when the CSI report is based on a codebook other than a Type II codebook that includes a Doppler component such as a DD basis vector (which can be configured for high-speed UE scenarios). For example, the codebook can be a Type II codebook of Release 15 / 16 / 17 without a Doppler component report or a Codebook of Release 18, but the codebook cannot be a Type II codebook of Release 18 (including a Doppler component). In one example, this example is used / configured for the CSI reporting window only when CSI reporting is configured for a low-speed UE. In one example, when W CSI =1, N 4 The value of = 1 (meaning that Doppler domain compression is not required).

[0392] In one example, l=n ref and W CSI In one example, for a codebook that does not include a Doppler component, such as a Release 15 / 16 / 17 NR Type II codebook or a Release 18 codebook without Doppler component reporting, W CSI = 1, and for codebooks that include a Doppler component, such as the Release 18 NR II codebook (for time / Doppler compression), W CSI >1. In one example, for a codebook that does not require any (UE-side or gNB-side) prediction, such as the NR Type II codebook of Release 15 / 16 / 17 or the codebook of Release 18 without Doppler component reporting, W CSI= 1, and for codebooks that require prediction (either at the UE or gNB side), such as the Release 18 NR type II codebook (for time / Doppler compression), W CSI >1. In one example, when W CSI =1, N 4 The value of = 1 (meaning that Doppler domain compression is not required).

[0393] In one example, l=n′ and W CSI =1, and n′ is the timeslot index of the CSI report. That is, the CSI reporting / validity window contains only one timeslot, namely the CSI reporting timeslot. In one example, this example is used / configured for the CSI reporting window only when the CSI report is based on a codebook other than a Type II codebook that includes a Doppler component such as a DD basis vector (which can be configured for high-speed UE scenarios). For example, the codebook can be a Type II codebook of Release 15 / 16 / 17 without a Doppler component report or a Codebook of Release 18, but the codebook cannot be a Type II codebook of Release 18 (including a Doppler component). In one example, this example is used / configured for the CSI reporting window only when CSI reporting is configured for a low-speed UE. In one example, when W CSI =1, N 4 = 1 (meaning that Doppler domain compression is not required). In one example, when W CSI >1, N 4 The value of > 1 (for example, W CSI =N 4 (meaning that Doppler domain compression is possible). In one example, when W CSI >1, N 4 = 1 (meaning that Doppler domain compression is not required) or N 4 The value of > 1 (for example, W CSI =N 4 (Meaning there can be Doppler domain compression).

[0394] In one example, l=n′ and W CSI In one example, for a codebook that does not include a Doppler component, such as a Release 15 / 16 / 17 NR Type II codebook or a Release 18 codebook without Doppler component reporting, W CSI = 1, and for codebooks that include a Doppler component, such as the Release 18 NR II codebook (for time / Doppler compression), W CSI >1. In one example, for a codebook that does not require any (UE-side or gNB-side) prediction, such as the NR Type II codebook of Release 15 / 16 / 17 or the codebook of Release 18 without Doppler component reporting, W CSI= 1, and for codebooks that require prediction (either at the UE or gNB side), such as the Release 18 NR type II codebook (for time / Doppler compression), W CSI >1. In one example, when W CSI =1, N 4 = 1 (meaning that Doppler domain compression is not required). In one example, when W CSI >1, N 4 The value of > 1 (for example, W CSI =N 4 (meaning that Doppler domain compression is possible). In one example, when W CSI >1, N 4 = 1 (meaning that Doppler domain compression is not required) or N 4 The value of > 1 (for example, W CSI =N 4 (Meaning there can be Doppler domain compression).

[0395] In one example, l=x and W CSI = 1, and x is the value of the starting time slot with the "new" reference resource (l ≥ n ref ), where the (starting) position of the “new” CSI reference resource is configured by the gNB via higher layer signaling (from multiple candidate values), or via a codepoint indication in a MAC CE activation command, or via a codepoint indication in a DCI (e.g., it may be included in a CSI request field triggered via DCI). The set of candidate values ​​starting from the CSI reference resource position (l) includes the legacy slot positions (n ref ) and CSI reporting time slot n′. That is, the CSI reporting / validity window contains only one time slot. In one example, this example is used / configured for the CSI reporting window only when the CSI report is based on a codebook other than a Type II codebook that includes a Doppler component such as a DD basis vector (which can be configured for high-speed UE scenarios). For example, the codebook can be a Type II codebook of Release 15 / 16 / 17 without a Doppler component report or a Codebook of Release 18, but the codebook cannot be a Type II codebook of Release 18 (including a Doppler component). In one example, this example is used / configured for the CSI reporting window only when CSI reporting is configured for low-speed UEs. In one example, when W CSI =1, N 4 = 1 (meaning that Doppler domain compression is not required). In one example, when W CSI >1, N 4 The value of > 1 (for example, W CSI =N 4 (meaning that Doppler domain compression is possible). In one example, when W CSI >1, N 4= 1 (meaning no Doppler domain compression is required) or N 4 The value of > 1 (for example, W CSI =N 4 (Meaning there can be Doppler domain compression).

[0396] In one example, l=x and W CSI is configured (e.g., via RRC or MAC CE or DCI), and x is the value of the starting slot with the “new” reference resource (l ≥ n ref ), where the (starting) position of the “new” CSI reference resource is configured by the gNB via higher layer signaling (from multiple candidate values), or via a codepoint indication in a MAC CE activation command, or via a codepoint indication in a DCI (e.g., it may be included in a CSI request field triggered via DCI). The set of candidate values ​​starting from the CSI reference resource position (l) includes the legacy slot positions (n ref ) and CSI reporting time slot n′. In one example, for a codebook that does not include a Doppler component, such as a Release 15 / 16 / 17 NR II codebook or a Release 18 codebook without Doppler component reporting, W CSI = 1, and for codebooks that include a Doppler component, such as the Release 18 NR II codebook (for time / Doppler compression), W CSI >1. In one example, for a codebook that does not require any (UE-side or gNB-side) prediction, such as the NR Type II codebook of Release 15 / 16 / 17 or the codebook of Release 18 without Doppler component reporting, W CSI = 1, and for codebooks that require prediction (either at the UE or gNB side), such as the Release 18 NR type II codebook (for time / Doppler compression), W CSI >1. In one example, when W CSI =1, N 4 = 1 (meaning that Doppler domain compression is not required). In one example, when W CSI >1, N 4 The value of > 1 (for example, W CSI =N 4 (meaning that Doppler domain compression is possible). In one example, when W CSI >1, N 4 = 1 (meaning no Doppler domain compression is required) or N 4 The value of > 1 (for example, W CSI =N 4 (Meaning there can be Doppler domain compression).

[0397] In one example, W CSIThe value depends on the UE capabilities (reported by the UE). For example, whether the UE can perform UE-side prediction is reported by the UE via its capability report, and W is determined accordingly. CSI Value (fixed / configured). In one example, whether UE-side prediction is needed depends on W CSI value.

[0398] In one example, l=k and k is fixed or configured as described above.

[0399] In one example, when the CQI calculation is conditioned on a PMI determined based on a codebook including a Doppler component (e.g., a Release 18 NR Type II codebook (for time / Doppler compression)), the PMI is expected to be CSI A CSI reporting window of >1 is valid, and at least one of the following is used / configured with respect to CQI.

[0400] Estimated CQI in reference time slot n ref The block error (BLER) probability requirement (e.g., 0.1) is met.

[0401] Estimated CQI in the CSI reporting window W CSI The block error rate (BLER) requirement (e.g., 0.1) is met at time slot s within the time slots. Here, s can be fixed (e.g., the first or last in the window) or configured.

[0402] Estimated CQI in the CSI reporting window W CSI The block error (BLER) probability requirement (eg, 0.1) is met at all time slots within the time slots.

[0403] When the CQI calculation is conditioned on a PMI determined based on a codebook that does not include a Doppler component (e.g., NR Type II codebook of Release 15 / 16 / 17), the PMI is expected to be in reference slot n. ref , and the CQI is expected to be in reference time slot n ref The block error (BLER) probability requirement (e.g., 0.1) is met.

[0404] In one embodiment, the UE is configured to determine N according to at least one of the following examples: 4 The value and N 4 The location of the TD / DD unit.

[0405] In one example, the UE is configured to meas Determine N 4 The value of and based on the measurement window [k, k+W meas ] or [k,k+W meas -1] Determine N 4The location of the TD / DD unit.

[0406] In one example, N 4 =W meas (in TD / FD), or W meas N ST (in time slots), or W meas N ST R ST (in sub-slot units). N 4 The position of each TD / DD unit corresponds to the measurement window. ST When ≤1, we can write Where d is a positive integer in the range {1, 2, 3, ...}, and in this case, W meas =dN 4 .

[0407] In one example, N 4 =R ST ×W meas , where R ST ≥1 or <1. ST The value of N may be fixed or configured (eg, via RRC or MAC CE or DCI). 4 The position of each TD / DD unit corresponds to the measurement window. ST When ≤1, we can write Where d is a positive integer in the range {1, 2, 3, ...}, and in this case, W meas =dN 4 .

[0408] In one example, N 4 >W meas . N 4 The location of each TD / DD unit includes the measurement window and the non-measurement window (as described above).

[0409] In one example, N 4 >R ST ×W meas . N 4 The location of each TD / DD unit includes the measurement window and the non-measurement window (as described above).

[0410] In one example, N 4 ≥W meas . N 4 The location of each TD / DD cell includes a measurement window and may also include a non-measurement window (as described above).

[0411] In one example, N 4 ≥R ST ×Wmeas . N 4 The location of each TD / DD cell includes a measurement window and may also include a non-measurement window (as described above).

[0412] In one example, the UE is configured to meas Determine N 4 and based on the CSI reporting / validity window [l,l+W CSI ] or [l,l+W CSI -1] Determine N 4 The location of the TD / DD unit.

[0413] In one example, N 4 =W meas (in TD / FD), or W meas N ST (in time slots), or W meas N ST R ST (in sub-time slots).

[0414] In one example, N 4 >W meas .

[0415] In one example, N 4 >R ST ×W meas .

[0416] In one example, N 4 ≥W meas .

[0417] In one example, N 4 ≥R ST ×W meas .

[0418] N 4 The location of the TD / DD cells corresponds to the CSI reporting / validity window (when N 4 =W CSI ) or a (smaller size) sub-window within the CSI reporting / validity window (when N 4 <W CSI hour).

[0419] In one example, the UE is configured to meas Determine N 4 The value of and based on the measurement window [k, k+W meas ] or [k,k+W meas -1] and CSI reporting / validity window [l,l+W CSI ] or [l,l+W CSI-1] Both determine N 4 The location of the TD / DD unit.

[0420] In one example, N 4 =W meas (in TD / FD), or W meas N ST (in time slots), or W meas N ST R ST (in sub-time slots).

[0421] In one example, N 4 >W meas .

[0422] In one example, N 4 >R ST ×W meas .

[0423] In one example, N 4 ≥W meas .

[0424] In one example, N 4 ≥R ST ×W meas .

[0425] N 4 The location of the TD / DD cells corresponds to the larger window including the measurement window and the CSI reporting / validity window (when N 4 =W meas +W CSI ) or a (smaller size) subwindow within a larger window (when N 4 <W meas +W CSI In one example, the larger window is equal to [min(k,l),min(k,l)+max(W meas ,W CSI )] or [min(k,l),min(k,l)+max(W meas ,W CSI )-1].

[0426] In one example, the UE is configured to CSI Determine N 4 The value of and based on the measurement window [k, k+W meas ] or [k,k+W meas -1] Determine N 4 The location of the TD / DD unit.

[0427] In one example, N 4 =WCSI (in TD / FD), or W CSI N ST (in time slots), or W CSI N ST R ST (in sub-time slots).

[0428] In one example, N 4 =R ST ×W CSI , where R ST ≥1 or <1. ST The value of may be fixed or configured (eg, via RRC or MAC CE or DCI). ST When ≤1, we can write Where d is a positive integer in the range {1, 2, 3, ...}, and in this case, W CSI =dN 4 .

[0429] In one example, N 4 <W CSI .

[0430] In one example, N 4 <R ST ×W CSI .

[0431] In one example, N 4 ≤W CSI .

[0432] In one example, N 4 ≤R ST ×W CSI .

[0433] N 4 The location of N TD / DD cells corresponds to the measurement window (eg, when the measurement window = CSI reporting window). 4 The location of a TD / DD unit includes (all or part of) the measurement window and the non-measurement window (for example, when the measurement window is smaller than the CSI reporting window).

[0434] In one example, the UE is configured to CSI Determine N 4 and based on the CSI reporting / validity window [l,l+W CSI ] or [l,l+W CSI -1] Determine N 4 The location of the TD / DD unit.

[0435] In one example, N 4 =WCSI (in TD / FD), or W CSI N ST (in time slots), or W CSI N ST R ST (in sub-slot units). N 4 The location of each TD / DD unit corresponds to the CSI reporting / validity window. ST When ≤1, we can write Where d is a positive integer in the range {1, 2, 3, ...}, and in this case, W CSI =dN 4 .

[0436] In one example, N 4 =R ST ×W CSI , where R ST ≥1 or <1. ST The value of N may be fixed or configured (eg, via RRC or MAC CE or DCI). 4 The location of each TD / DD cell corresponds to the CSI reporting / validity window. ST When ≤1, we can write Where d is a positive integer in the range {1, 2, 3, ...}, and in this case, W CSI =dN 4 .

[0437] In one example, N 4 <W CSI . N 4 The location of each TD / DD unit is included in the CSI reporting / validity window.

[0438] In one example, N 4 <R ST ×W CSI . N 4 The location of each TD / DD unit is included in the CSI reporting / validity window.

[0439] In one example, N 4 ≤W CSI . N 4 The location of each TD / DD unit corresponds to or is included in a CSI reporting / validity window.

[0440] In one example, N 4 ≤R ST ×W CSI . N 4The location of each TD / DD unit corresponds to or is included in a CSI reporting / validity window.

[0441] In one example, the UE is configured to CSI Determine N 4 The value of and based on the measurement window [k, k+W meas ] or [k,k+W meas -1] and CSI reporting / validity window [l,l+W CSI ] or [l,l+W CSI -1] Both determine N 4 The location of the TD / DD unit.

[0442] In one example, N 4 =W CSI (in TD / FD), or W CSI N ST (in time slots), or W CSI N ST R ST (in sub-time slots).

[0443] In one example, N 4 =R ST ×W CSI , where R ST ≥1 or <1. ST The value of may be fixed or configured (eg, via RRC or MAC CE or DCI). ST When ≤1, we can write Where d is a positive integer in the range {1, 2, 3, ...}, and in this case, W CSI =dN 4 .

[0444] In one example, N 4 <W CSI .

[0445] In one example, N 4 <R ST ×W CSI .

[0446] In one example, N 4 ≤W CSI .

[0447] In one example, N 4 ≤R ST ×W CSI .

[0448] N 4The location of the TD / DD cells corresponds to the larger window including the measurement window and the CSI reporting / validity window (when N 4 =W meas +W CSI ) or a (smaller size) subwindow within a larger window (when N 4 <W meas +W CSI In one example, the larger window is equal to [min(k,l),min(k,l)+max(W meas ,W CSI )] or [min(k,l),min(k,l)+max(W meas ,W CSI )-1].

[0449] In one example, the UE is configured to meas and W CSI Both determine N 4 The value of and based on the measurement window [k, k+W meas ] or [k,k+W meas -1] Determine N 4 The location of the TD / DD unit.

[0450] In one example, N 4 =f(W meas ,W CSI )(in TD / FD), or f(W meas ,W CSI )N ST (in time slots), or f(W meas ,W CSI )N ST R ST (in sub-time slots).

[0451] In one example, N 4 =R ST ×f(W meas ,W CSI ), where R ST ≥1 or <1. ST The value of may be fixed or configured (eg, via RRC or MAC CE or DCI). ST When ≤1, we can write Where d is a positive integer in the range {1, 2, 3, ...}, and in this case, f(W meas ,W CSI ) = dN 4 .

[0452] In one example, N 4 <f(Wmeas ,W CSI ).

[0453] In one example, N 4 <R ST ×f(W meas ,W CSI ).

[0454] In one example, N 4 ≤f(W meas ,W CSI ).

[0455] In one example, N 4 ≤R ST ×f(W meas ,W CSI ).

[0456] In one example, f(W meas ,W CSI )=(W meas +W CSI In one example, f(W meas ,W CSI )=max(W meas ,W CSI In one example, f(W meas ,W CSI )=min(W meas ,W CSI ).

[0457] N 4 The location of N TD / DD cells corresponds to the measurement window (eg, when the measurement window = CSI reporting window). 4 The location of a TD / DD unit includes (all or part of) the measurement window and the non-measurement window (for example, when the measurement window is smaller than the CSI reporting window).

[0458] In one example, the UE is configured to meas and W CSI Both determine N 4 and based on the CSI reporting / validity window [l,l+W CSI ] or [l,l+W CSI -1] Determine N 4 The location of the TD / DD unit.

[0459] In one example, N 4 =f(W meas ,W CSI )(in TD / FD), or f(W meas ,W CSI )NST (in time slots), or f(W meas ,W CSI )N ST R ST (in sub-time slots).

[0460] In one example, N 4 =R ST ×f(W meas ,W CSI ), where R ST ≥1 or <1. R ST The value of may be fixed or configured (eg, via RRC or MAC CE or DCI). ST When ≤1, we can write Where d is a positive integer in the range {1, 2, 3, ...}, and in this case, f(W meas ,W CSI ) = dN 4 .

[0461] In one example, N 4 <f(W meas ,W CSI ).

[0462] In one example, N 4 <R ST ×f(W meas ,W CSI ).

[0463] In one example, N 4 ≤f(W meas ,W CSI ).

[0464] In one example, N 4 ≤R ST ×f(W meas ,W CSI ).

[0465] In one example, f(W meas ,W CSI )=(W meas +W CSI In one example, f(W meas ,W CSI )=max(W meas ,W CSI In one example, f(W meas ,W CSI )=min(W meas ,W CSI ).

[0466] N 4 The location of N TD / DD cells corresponds to the CSI reporting / validity window (eg, when measurement window = CSI reporting window). 4 The location of a TD / DD unit includes (all or part of) the CSI reporting / validity window and the non-measurement window (e.g., when the measurement window is smaller than the CSI reporting window).

[0467] In one example, the UE is configured to meas and W CSI Both determine N 4 The value of and based on the measurement window [k, k+W meas ] or [k,k+W meas -1] and CSI reporting / validity window [l,l+W CSI ] or [l,l+W CSI -1] Both determine N 4 The location of the TD / DD unit.

[0468] In one example, N 4 =f(W meas ,W CSI )(in TD / FD), or f(W meas ,W CSI )N ST (in time slots), or f(W meas ,W CSI )N ST R ST (in sub-time slots).

[0469] In one example, N 4 =R ST ×f(W meas ,W CSI ), where R ST ≥1 or <1. R ST The value of may be fixed or configured (eg, via RRC or MAC CE or DCI). ST When ≤1, we can write Where d is a positive integer in the range {1, 2, 3, ...}, and in this case, f(W meas ,W CSI ) = dN 4 .

[0470] In one example, N 4 <f(W meas ,W CSI ).

[0471] In one example, N 4<R ST ×f(W meas ,W CSI ).

[0472] In one example, N 4 ≤f(W meas ,W CSI ).

[0473] In one example, N 4 ≤R ST ×f(W meas ,W CSI ).

[0474] N 4 The location of the TD / DD cells corresponds to the larger window including the measurement window and the CSI reporting / validity window (when N 4 =W meas +W CSI ) or a (smaller size) subwindow within a larger window (when N 4 <W meas +W CSI In one example, the larger window is equal to [min(k,l),min(k,l)+max(W meas ,W CSI )] or [min(k,l),min(k,l)+max(W meas ,W CSI )-1].

[0475] Fig.23 FIG. 1 shows a method configured to determine N according to an embodiment of the present disclosure. 4 Example 2300 of a UE with a value of . Fig.23 is configured to determine N 4 The example 2400 embodiment of the UE with the value of is for illustration only. Fig.23 The scope of the present disclosure is not limited to a device configured to determine N 4 Any particular implementation of example 2300 of UE with a value.

[0476] In one example, if Fig.23 As shown, the UE is configured to determine N according to at least one of the following examples 4 The value of .

[0477] In one example ( Fig.23 Ex1), N 4 =mk or m-k+1, where n ref <m<n′。

[0478] In one example ( Fig.23 Ex2), N4 = m - z or m - z + 1, where n ref < m < n' and k < z < n ref .

[0479] In one example ( Fig.23 Ex3 in 4 N = m - n ref or m - n ref + 1, where n ref < m < n'.

[0480] In one example ( Fig.23 Ex4 in 4 N = n' - k or n' - k + 1.

[0481] In one example ( Fig.23 Ex5 in 4 N = n' - z or n' - z + 1, where k < z < n ref .

[0482] In one example ( Fig.23 Ex6 in 4 N = n' - n ref or n' - n ref + 1.

[0483] In one example ( Fig.23 Ex7 in 4 N = n f - k or n f - k + 1.

[0484] In one example ( Fig.23 Ex8 in 4 N = n f - z or n f - z + 1, where k < z < n ref .

[0485] In one example ( Fig.23 Ex9 in 4 N = n f - n ref or n f - n ref + 1. Here, the starting point (time slot) of W CSI is n ref .

[0486] In one example, N 4 = W CSI = n f - n' or n f - n' + 1. Here, W CSIThe starting point (time slot) is n'.

[0487] In one example, N 4 = W CSI R ST = (n f - n')R ST or (n f - n' + 1)R ST where R ST ≥ 1 or < 1. The value of R ST can be fixed or configured (e.g., via RRC or MAC CE or DCI). The positions of N 4 TD / DD units correspond to the CSI report / validity window. Here, the starting point (time slot) of W CSI is n'. When R ST ≤ 1, we can write where d is a positive integer with a range of {1, 2, 3,...}, and in this case, W CSI = dN 4 .

[0488] In one example, N 4 = W CSI R ST = (n f - n ref )R ST or (n f - n ref + 1)R ST where R ST ≥ 1 or < 1. The value of R ST can be fixed or configured (e.g., via RRC or MAC CE or DCI). The positions of N 4 TD / DD units correspond to the CSI report / validity window. Here, the starting point (time slot) of W CSI is n ref . When R ST ≤ 1, we can write where d is a positive integer with a range of {1, 2, 3,...}, and in this case, W CSI = dN 4 .

[0489] In one example, N 4 = W CSI = n f - l or n f - l + 1, where n' < l or n' ≤ l. Here, W CSIThe starting point (time slot) of is l. The value of l can be fixed or configured (e.g., via RRC or MAC CE or DCI).

[0490] In one example, N 4 = W CSI R ST = (n f - l)R ST or (n f - l + 1)R ST , where R ST ≥ 1 or < 1, and n′ < l or n′ ≤ l. Here, the starting point (time slot) of W CSI is l. The value of l can be fixed or configured (e.g., via RRC or MAC CE or DCI). The value of R ST can be fixed or configured (e.g., via RRC or MAC CE or DCI). The positions of N 4 TD / DD units correspond to the CSI report / validity window. When R ST ≤ 1, we can write where d is a positive integer with a value range of {1, 2, 3,...}, and in this case, W CSI = dN 4 .

[0491] In one example, the starting point (time slot) of W CSI is n ref or l, and one of them is configured via higher layer signaling. In one example, l = n′ + δ, where δ ≥ 0. In one example, δ is fixed (e.g., 0), or is configured via higher layer (RRC) signaling from {0, 1, 2, 3, 4, 6, 8}. In one example, δ is configured via higher layer (RRC) signaling from S = {0, 2, v}, where v is an additional value. In one example, the additional value is according to one of the following examples

[0492] In one example, v = 1, meaning S = {0, 1, 2}.

[0493] In one example, v = 3, meaning S = {0, 2, 3}.

[0494] In one example, v = 4, meaning S = {0, 2, 4}.

[0495] In one example, v = 5, meaning S = {0, 2, 5}.

[0496] In one example, when n ref = n′ - n CSI,ref , the previous examples are equivalent to the following. W CSIThe starting point (time slot) is l = n' + δ, where δ ≥ 0 or δ = -n CSI,ref In one example, δ is fixed (e.g., 0 or -n CSI,ref ), or via higher layer (RRC) signaling from {-n CSI,ref ,0,1,2,3,4,6,8}. In one example, δ is signaled via higher layer (RRC) from S={-n CSI,ref ,0,2,v} configuration, where v is the additional value. In one example, the additional value is one of the following examples

[0497] In one example, v=1, meaning S={0, 1, 2}.

[0498] In one example, v=3, meaning S={0, 2, 3}.

[0499] In one example, v=4, meaning S={0, 2, 4}.

[0500] In one example, v=5, which means S={0, 2, 5}.

[0501] In one example, for CQI and PMI reporting, R ST The value is the same (ie, one value). In one example, also for CQI and PMI reporting, R ST The values ​​can be different (ie, two separate values).

[0502] In one example, when W CSI =dN 4 When d is set to 1, the value of d may be fixed (e.g., 1) or may be configurable. When configured, it may be configurable from {1, x}, where x = a value proportional to the period (p) of a periodic or semi-persistent NZP CSI-RS resource or a value proportional to the interval (m) between two consecutive non-periodic NZP CSI-RS resources among K>1 non-periodic CSI-RS resources jointly triggered by a single DCI. In one example, x = p, or x = m resources. Note that d may be equivalent to one of the following definitions:

[0503] UE side: Duration (expected validity time) of each of the N4 precoding matrices before DD / TD compression (uncompressed).

[0504] gNB side: Duration (expected validity time) of each of the N4 precoding matrices to be reconstructed / decompressed.

[0505] Note that d is the size of each TD / DD unit of PMI.

[0506] In one example, W CSIThe value can be W CSI =1. In one example, W CSI =1 means d = 1 and N 4 =1. In one example, even in N 4 >1 can also be configured with W CSI =1, in this case Using it as a possible value can reduce the burden (complexity) of UE-side prediction (e.g., channel prediction) and can also avoid the problem of lag due to the use of a wider CSI reporting window (when W CSI >1) resulting in excessive user throughput loss due to the strict 10% BLER requirement.

[0507] In addition, when W CSI When TD / DD unit size of PMI = DD / TD unit size of CQI = 1.

[0508] In one example, W CSI Can be determined / configured based on one of the following:

[0509] (A)W CSI =1 (e.g., d = N 4 =1) or

[0510] (B)W CSI >1 (e.g., W CSI =dN 4 >1 or d and N 4 At least one of >1).

[0511] In one example, W CSI Can be determined / configured based on one of the following:

[0512] (A)W CSI =1 (e.g. d = N 4 =1), if the first condition is met,

[0513] (B)W CSI >1 (e.g., W CSI =dN 4 >1 or d and N 4 At least one of > 1), if the second condition is met,

[0514] (C)W CSI Configured as (A)W CSI =1 or (B)W CSI > 1. This configuration can be via higher layers (RRC).

[0515] In one example, the first condition corresponds to at least one of the following.

[0516] In one example, the first condition corresponds to the case when l ≥ n′ (ie, the CSI reporting window W CSI The starting point of is at time slot l which is equal to the CSI reporting time slot), where n′ is as defined in this document.

[0517] In one example, the second condition corresponds to at least one of the following.

[0518] In one example, the second condition corresponds to when l=n ref The situation when (i.e., CSI reporting window W CSI The starting point is at time slot l which is equal to the CSI reference resource time slot), where n ref As defined herein.

[0519] In one example, W CSI Can be determined / configured based on one of the following:

[0520] (B)W CSI >1 (e.g., W CSI =dN 4 >1 or d and N 4 At least one of > 1), if the second condition is met,

[0521] (C)W CSI Configured as (A)W CSI =1 or (B)W CSI > 1. This configuration can be via higher layers (RRC).

[0522] In one example, when in the time domain (eg, across W CSI )) When X CQIs are reported, each of the X CQIs has or or Therefore, for CQI,

[0523] or or When W CSI =dN 4 When or or In one example, X is fixed (e.g., 1). In one example, X is configured (e.g., RRC) from, for example, {1, 2}, or {1, N4}, or {1, 2, N4}. In one example, X is reported by the UE. In one example, support of X>1 (e.g., X=2) is optional, so a separate UE capability report from the UE is required. The value X=2 can be configured only if the UE reports that it can support it. In one example, the value of X depends on N4 and / or Q. For example, when N 4 =1 and / or Q=1, only X=1 is supported, and when N 4 >1, two values ​​are supported (eg, X=1, 2) (or one of them can be configured).

[0524] Note: When X = 1 CQI, the number of valid windows (or windows supported by the UE) for CQI is 1, which includes all time slots in the CSI reporting window, and when X = 2 CQI, the number of valid windows (or windows supported by the UE) for CQI is 2, each including 1 time slot in the CSI reporting window. or Z time slots, where Z is defined as follows.

[0525] Fig.24 An example 2400 of a CQI validity window according to an embodiment of the present disclosure is shown. Fig.24 The example 2400 embodiment of the CQI validity window shown in FIG. 2 is for illustration only. Fig.24 The scope of the present disclosure is not limited to any particular implementation of the example 2400 of the CQI validity window.

[0526] Fig.25 An example 2500 of a CQI validity window according to an embodiment of the present disclosure is shown. Fig.25 The example 2500 embodiment of the CQI validity window shown in FIG. 2 is for illustration only. Fig.25 The scope of the present disclosure is not limited to any particular implementation of the example 2500 of the CQI validity window.

[0527] Fig.26 An example 2600 of a CQI validity window according to an embodiment of the present disclosure is shown. Fig.26 The example 2600 embodiment of the CQI validity window shown in FIG. 2 is for illustration only. Fig.26 The scope of the present disclosure is not limited to any particular implementation of the example 2600 of the CQI validity window.

[0528] In one example, the CQI validity window includes a time slot associated with the CQI or for which the CQI is expected to be valid. In one example, the CQI of the validity window is calculated based on a time slot within the validity window (i.e., a time slot that is a reference resource for the CQI) (e.g., Fig.24 , Fig.25 and Fig.26In one example, the CQI of the validity window is calculated based on two time slots within the validity window (i.e., two time slots used as reference resources for the CQI). In one example, the CQI of the validity window is calculated based on d time slots of the DD / TD unit containing the PMI within the validity window (i.e., 1 DD unit or d consecutive time slots used as reference resources for the CQI). In one example, the CQI of the validity window is calculated based on 2d time slots of the two DD / TD units containing the PMI within the validity window (i.e., 2 DD units used as reference resources for the CQI). In one example, the CQI of the validity window is calculated based on all time slots within the validity window (i.e., all time slots within the validity window are used as reference resources for the CQI).

[0529] In one example, support for X=1 and one time slot (e.g., the first time slot of CSI reporting window 1) as a reference resource for X=1 CQI is a basic or mandatory feature, i.e., a UE supporting the Type II Doppler codebook (as described above) is expected to support X=1 and one reference time slot for CQI. 4 Values ​​including 1 (e.g., {1, 2, 4, 8}) support this basic or mandatory feature.

[0530] In one example, for X=1 and two time slots (s 1 ,s 2 ) as a reference resource for X=1 CQI is optional, and therefore requires a separate UE capability report from the UE. The value X=1 and two time slots (s ) may be configured only if the UE reports that it can support it. 1 ,s 2 ) as the reference resource for X=1CQI. 4 Values ​​(including 1) (e.g., {1, 2, 4, 8}) support this optional feature.

[0531] In one example, two time slots (s 1 ,s 2 ) is fixed, for example or (l,l+Z) or (l,W CSI -1), where Z is the middle time slot, as defined below, and l is the first time slot of the CSI reporting window.

[0532] In one example, two time slots (s 1 ,s 2 ) is determined based on UE capability reporting, for example, the UE may report the values ​​it supports, such as from or (l,l+Z) or (l,W CSI -1), where Z is the middle time slot, as defined below.

[0533] In one example, two time slots (s 1 ,s 2 )Based on N 4 or W CSI The value of is implicitly determined, for example, when N 4 ≤t or W CSI ≤t,(s 1 ,s 2 )=T 1 , otherwise (s 1 ,s 2 )=T 2 , where T 1 ,T 2 yes or (l,l+Z) or (l,W CSI -1), where Z is the middle time slot, as defined below.

[0534] In one example, two time slots (s 1 ,s 2 ) is fixed and the other time slot is configured (via RRC or via MAC CE or DCI). The configuration of the other time slot may be subject to UE capability reporting, i.e., the UE may report one or more candidate time slots for the other time slot.

[0535] In one example, s 1 is fixed, for example, s 1 = l (1st time slot), and s 2 is configured (via RRC or via MAC CE or DCI), where s 2 The set of candidate values ​​for is or

[0536] In one example, two time slots (s 1 ,s 2 ) is configured (via RRC or via MAC CE or DCI). In one example, the candidate value (s 1 ,s 2 ) includes or (l,l+Z) or (l,W CSI -1). This configuration may be subject to UE capability reporting, i.e., the UE may report one or more candidate values ​​for both time slots.

[0537] In one example, for X=2 and two time slots (s 1 ,s 2 ) as a reference resource for X = 2 CQIs is optional, where s 1 For CQI1 and s 2For CQI2 or (s 1 ,s 2 ) for both CQI1 and CQI2, so a separate UE capability report from the UE is required. X=2 and two time slots (s 1 ,s 2 ) as a reference resource of X=2 CQIs. In one example, all N 4 Values ​​(including 1), such as {1, 2, 4, 8} support this optional feature. In one example, only when N 4 This optional feature is supported only when >1, for example {2, 4, 8}.

[0538] In one example, two time slots (s 1 ,s 2 ) is fixed, for example or (l,l+Z) or (l,W CSI -1), where Z is the middle time slot, as defined below.

[0539] In one example, two time slots (s 1 ,s 2 ) is determined based on UE capability reporting, for example, the UE may report the values ​​it supports, such as from or (l,l+Z) or (l,W CSI -1), where Z is the middle time slot, as defined below.

[0540] In one example, two time slots (s 1 ,s 2 )Based on N 4 or W CSI The value of is implicitly determined, for example, when N 4 ≤t or W CSI ≤t, (s 1 ,s 2 )=T 1 , otherwise (s 1 ,s 2 )=T 2 , where T 1 ,T 2 yes or (l,l+Z) or (l,W CSI -1), where Z is the middle time slot, as defined below.

[0541] In one example, two time slots (s 1 ,s 2) is fixed and the other time slot is configured (via RRC or via MAC CE or DCI). The configuration of the other time slot may be subject to UE capability reporting, i.e., the UE may report one or more candidate time slots for the other time slot.

[0542] In one example, s 1 is fixed, for example, s 1 = l (1st time slot), and s 2 is configured (via RRC or via MAC CE or DCI), where s 2 The set of candidate values ​​for is or

[0543] In one example, two time slots (s 1 ,s 2 ) is configured (via RRC or via MAC CE or DCI). In one example, the candidate value (s 1 ,s 2 ) includes or (l,l+Z) or (l,W CSI -1). This configuration may be subject to UE capability reporting, i.e., the UE may report one or more candidate values ​​for both time slots.

[0544] In one example, if Fig.24 and Fig.25 As shown, regarding the time instance and / or PMI associated with the CQI, given the CSI reporting window WCSI (in time slots), assuming that there are X=1 CQIs in one subband and one CSI reporting instance, at least one of the following examples can be used / configured:

[0545] In one example (ExA), the entire duration of the CQI and CSI reporting window and all N 4 W 2 Matrix association.

[0546] In one example (ExB), the CQI and CSI reporting window first / earliest time slot (e.g., 1) and N 4 W 2 The first / oldest matrix in the matrix is ​​associated.

[0547] In one example (ExC), the CQI and CSI reporting window has the first / earliest d time slots (including the first DD / TD unit) and N 4 W 2 The first / oldest matrix in the matrix is ​​associated.

[0548] In one example, two time slots (s 1 ,s 2 ) is associated with the report window, which includes W CSI time slots, where (s 1 ,s 2 ) is based on at least one of the following examples.

[0549] In one example (ExB.1), (s 1 ,s 2 )=(l,l+W CSI -1), i.e., the first / earliest time slot of the CSI reporting window (e.g., l) and the last / latest time slot of the CSI reporting window (e.g., l+W CSI -1).

[0550] In one example (ExB.2), (s 1 ,s 2 )=(l,l+W CSI =W-d), i.e., the first time slot (e.g., l) of the first / earliest DD / TD unit (e.g., including the first d time slots of the CSI reporting window) and the first time slot (i.e., l+W) of the last / latest DD / TD unit (e.g., including the last d time slots of the CSI reporting window). CSI -d).

[0551] In one example (ExB.3), That is, the first time slot of the first half of the CSI reporting window (e.g., 1), and the first time slot of the second half of the CSI reporting window (e.g., )

[0552] In one example (ExB.3), (s 1 ,s 2 )=(l,l+Z), i.e., the first time slot (e.g., l) and the middle time slot of the CSI reporting window, i.e., the (l+Z)th or (l+Z+1)th or (l+Z-1)th time slot of the CSI reporting window, where Z is the middle time slot, according to at least one of the following examples.

[0553] In one example (ExC.1), (s 1 …s d ,s d+1 ,…,s 2d )=(l,…l+d-1,l+W CSI -d,…,l+W CSI -1)(s 1 …s d ,s d+1 ,…,s 2d)=(l,…l+d-1,l+W CSI -d,…,l+W CSI -1), i.e., the first / earliest d time slots l,…l+d-1 (including the first DD / TD unit) of the CSI reporting window, and the last / latest d time slots l+W of the CSI reporting window CSI -d,…,l+W CSI -1 (including the last DD / TD unit).

[0554] In one example (ExC.2), (s 1 …s d ,s d+1 ,…,s 2d )=(l,…l+d-1,l+(D-1)d-1,…,l+Dd-1), i.e., the first / earliest d time slots l,…l+d-1 (including the first DD / TD unit) of the CSI reporting window, and the first d time slots l,…l+d-1 (including the first DD / TD unit) of the CSI reporting window. or DD / TD units, including time slots l+(D-1)d-1,…,l+Dd-1).

[0555] In one example (ExC.2), (s 1 …s d ,s d+1 ,…,s 2d )=(l,…l+d-1,l+(Y-1)dd,…,l+Yd-1)(s 1 …s d ,s d+1 ,…,s 2d )=(l,…l+d-1,l+(Y-1)dd,…,l+Yd-1), i.e., the first / earliest d time slots l,…l+d-1 (including the first DD / TD unit) of the CSI reporting window and the Yth or (Y+1)th or (Y-1)th DD / TD unit of the CSI reporting window, and N 4 W 2 The Yth or (Y+1)th or (Y-1)th matrix includes time slots l+(Y-1)dd,…,l+Yd-1, where Y is according to one of the following examples.

[0556] Here, when N 4 >1, N 4 W 2 The matrix represents the combining coefficients before DD compression at the UE or after DD decompression at the gNB. 4 =1, N 4 W 2 The matrix represents the uncompressed combined coefficients.

[0557] In one example, if Fig.26 As shown, regarding the time instance and / or PMI associated with the CQI, given the CSI reporting window WCSI (in time slots), assuming that there are X=2 CQIs (labeled as CQI1 and CQI2) in one subband and one CSI reporting instance, at least one of the following examples can be used / configured:

[0558] In one example (ExA), the first CQI (CQI1) is associated with the first half of the entire duration of the CSI reporting window (including or or time slots) and N 4 W 2 The first half of the matrix (including or or Similarly, the second CQI (CQI2) is associated with the second half of the entire duration of the CSI reporting window (including or or time slots) and N 4 W 2 The second half of the matrix (including or or TD / DD units).

[0559] In one example (ExB.1), the first CQI (CQI1) is associated with the first / earliest time slot (e.g., 1) and N 4 W 2 The first / earliest matrix of the CSI reporting window is associated with the second CQI (CQI2), and the last / latest time slot (e.g., l+W) of the CSI reporting window is associated with the first / earliest matrix of the CSI reporting window. CSI -1) and N 4 W 2 The matrix to which the last / latest matrix is ​​associated.

[0560] In one example (ExB.2), the first CQI (CQI1) is associated with the first slot of the first / earliest DD / TD unit (eg, including the first d slots of the CSI reporting window) and N 4 W 2 The first / earliest matrix of the CSI reporting window is associated with the first slot of the last / latest DD / TD cell (e.g., including the last d slots of the CSI reporting window), while the second CQI (CQI2) is associated with the first slot of the last / latest DD / TD cell (e.g., including the last d slots of the CSI reporting window) and N 4 W 2 The matrix to which the last / latest matrix is ​​associated.

[0561] In one example (ExB.3), the first CQI (CQI1) is associated with the first time slot of the first half of the CSI reporting window and N 4 W 2 The first / earliest matrix of the matrix is ​​associated with the first time slot of the second half of the CSI reporting window and the second CQI (CQI2) is associated with the first time slot of the second half of the CSI reporting window and N 4 W 2 W in the middle of the matrix 2 Or equivalently, the second CQI (CQI2) is associated with the middle time slot of the CSI reporting window (ie, the (l+Z)th or (l+Z+1)th or (l+Z-1)th time slot) and N 4 W 2 W in the middle of the matrix 2 The matrices are associated with Z according to one of the following examples.

[0562] In one example (ExC.1), the first CQI (CQI1) is associated with the first / earliest d slots (including the first DD / TD unit) and N 4 W 2 The first / earliest matrix of the matrix is ​​associated with the second CQI (CQI2) and the last / latest d time slots (including the last DD / TD unit) and N of the CSI reporting window. 4 W 2 The matrix to which the last / latest matrix is ​​associated.

[0563] In one example (ExC.2), the first CQI (CQI1) is associated with the first / earliest d slots (including the first DD / TD unit) and N 4 W 2 The first / earliest matrix of the CSI reporting window is associated with the second CQI (CQI2) and the first / oldest matrix of the CSI reporting window. or Unit and N 4 W 2 The matrix or Or equivalently, the second CQI (CQI2) is associated with the Yth or (Y+1)th or (Y-1)th DD / TD unit and N 4 W 2 The Yth or (Y+1)th or (Y-1)th matrix is ​​associated, where Y is according to one of the following examples.

[0564] Here, when N 4 >1, N 4 W 2The matrix represents the combining coefficients before DD compression at the UE or after DD decompression at the gNB. 4 =1, N 4 W 2 The matrix represents the uncompressed combined coefficients.

[0565] In one example, the first half of the CSI reporting window includes time slots [l, l+Z-1], and the second half of the CSI reporting window includes time slots [l+Z, l+W CSI -1], where Z is based on at least one of the following examples.

[0566] In one example, or or

[0567] In one example, or or

[0568] In one example, or or

[0569] Based on the above, the slots in the middle slots of the CSI reporting window correspond to index l+Z or l+Z-1.

[0570] In one example, N 4 W 2 The first half of the matrix consists of W with DD / TD cells with indices [0, Y-1] 2 Matrix, and N 4 W 2 The second half of the matrix consists of 4 -1] DD / TD unit W 2 A matrix, where Y is according to at least one of the following examples.

[0571] In one example, or or

[0572] In one example, or or

[0573] In one example, or or

[0574] Based on the above, N 4 W 2W in the middle of the matrix 2 The matrix corresponds to index Y or Y-1.

[0575] In one example, Fig.26 With respect to the time instance and / or PMI associated with the CQI, given a CSI reporting window WCSI (in time slots), assuming that there are X ≥ 2 CQIs (labeled as CQI1 and CQI2) in a subband and a CSI reporting instance, at least one of the following examples may be used / configured:

[0576] In one example (ExA), the first CQI (CQI1) is associated with the first portion of the entire duration of the CSI reporting window and N 4 W 2 The first part of the matrix is ​​associated with the second CQI (CQI2) and the second part of the entire duration of the CSI reporting window and N 4 W 2 The second part of the matrix is ​​associated, and so on.

[0577] In one example (ExB.3), the first CQI (CQI1) is associated with the first time slot of the first part of the CSI reporting window and N 4 W 2 The first W of the first part of the matrix 2 The second CQI (CQI2) is associated with the first time slot of the second part of the CSI reporting window and W 2 The first W of the second part of the matrix 2 Related, and so on.

[0578] In one example (ExC.2), the first CQI (CQI1) is associated with the first d slots of the first part of the CSI reporting window and N 4 W 2 The first W of the first part of the matrix 2 The second CQI (CQI2) is associated with the first d time slots of the second part of the CSI reporting window and N 4 W 2 The first W of the second part of the matrix 2 Related, and so on.

[0579] Here, the CSI reporting window can be divided into X parts, each part includes Z time slots, and similarly, N 4 W 2 The matrix can be divided into X parts, each part includes Z matrices, where Z and Y are according to one of the following examples:

[0580] In one example, or or

[0581] In one example, or or

[0582] In one example, or or

[0583] In one example, or or

[0584] In one example, or or

[0585] In one example, or or

[0586] In one example, the number of CQIs = 1 or > 1, i.e., X = 1 or X > 1 (e.g., X = 2), depending on the condition, where the condition is based on at least one of the following examples.

[0587] In one example, the condition depends on N 4 value.

[0588] In one example, when N 4 = 1, X = 1, and when N 4 > 1, X > 1 (e.g., X = 2) or X ≥ 1 (e.g., X = 1, 2).

[0589] In one example, when N 4 ≤ t, X = 1, and when N 4 > t, X > 1 (e.g., X = 2) or X ≥ 1 (e.g., X = 1, 2), where t can be fixed (e.g., 2 or 4 or 8), or configured or reported by the UE (e.g., as part of CSI report and / or UE capability information).

[0590] In one example, when N 4 < t, X = 1, and when N 4 ≥ t, X > 1 (e.g., X = 2) or X ≥ 1 (e.g., X = 1, 2), where t can be fixed (e.g., 2 or 4 or 8), or configured or reported by the UE (e.g., as part of CSI report and / or UE capability information).

[0591] In one example, the condition depends on W CSI value.

[0592] In one example, when W CSI = 1, X = 1, and when W CSI > 1, X > 1 (e.g., X = 2) or X ≥ 1 (e.g., X = 1, 2).

[0593] In one example, when W CSI ≤ t, X = 1, and when W CSI > t, X > 1 (e.g., X = 2) or X ≥ 1 (e.g., X = 1, 2), where t can be fixed (e.g., 4 or 8 or 16), or configured or reported by the UE (e.g., as part of a CSI report and / or UE capability information).

[0594] In one example, when W CSI < t, X = 1, and when W CSI ≥ t, X > 1 (e.g., X = 2) or X ≥ 1 (e.g., X = 1, 2), where t can be fixed (e.g., 4 or 8 or 16), or configured or reported by the UE (e.g., as part of a CSI report and / or UE capability information).

[0595] In one example, the condition depends on W CSI and N 4 values.

[0596] In one example, when W CSI = 1 or N 4 = 1, X = 1, otherwise X > 1 (e.g., X = 2) or X ≥ 1 (e.g., X = 1, 2).

[0597] In one example, when W CSI = 1 and N 4 = 1, X = 1, otherwise X > 1 (e.g., X = 2) or X ≥ 1 (e.g., X = 1, 2).

[0598] In one example, when N 4 ≤ t and W CSI ≤ s, X = 1, and when N 4 > t or W CSI > s, X > 1 (e.g., X = 2) or X ≥ 1 (e.g., X = 1, 2), where t can be fixed (e.g., 2 or 4 or 8), or configured or reported by the UE (e.g., as part of a CSI report and / or UE capability information), and s can be fixed (e.g., 4 or 8 or 16), or configured or reported by the UE (e.g., as part of a CSI report and / or UE capability information).

[0599] In one example, when N 4 ≤ t and W CSIWhen N < s, X = 1, and when N 4 > t or W CSI ≥ s, X > 1 (e.g., X = 2) or X ≥ 1 (e.g., X = 1, 2), where t can be fixed (e.g., 2 or 4 or 8), or configured or reported by the UE (e.g., as part of CSI report and / or UE capability information), and s can be fixed (e.g., 4 or 8 or 16), or configured or reported by the UE (e.g., as part of CSI report and / or UE capability information).

[0600] In one example, when N 4 < t and W CSI ≤ s, X = 1, and when N 4 ≥ t or W CSI > s, X > 1 (e.g., X = 2) or X ≥ 1 (e.g., X = 1, 2), where t can be fixed (e.g., 2 or 4 or 8), or configured or reported by the UE (e.g., as part of CSI report and / or UE capability information), and s can be fixed (e.g., 4 or 8 or 16), or configured or reported by the UE (e.g., as part of CSI report and / or UE capability information).

[0601] In one example, when N 4 < t and W CSI < s, X = 1, and when N 4 ≥ t or W CSI ≥ s, X > 1 (e.g., X = 2) or X ≥ 1 (e.g., X = 1, 2), where t can be fixed (e.g., 2 or 4 or 8), or configured or reported by the UE (e.g., as part of CSI report and / or UE capability information), and s can be fixed (e.g., 4 or 8 or 16), or configured or reported by the UE (e.g., as part of CSI report and / or UE capability information).

[0602] In one example, the condition depends on d and N 4 values.

[0603] In one example, when d = 1 or N 4 = 1, X = 1, otherwise X > 1 (e.g., X = 2) or X ≥ 1 (e.g., X = 1, 2).

[0604] In one example, when d = 1 and N 4 = 1, X = 1, otherwise X > 1 (e.g., X = 2) or X ≥ 1 (e.g., X = 1, 2).

[0605] In one embodiment, the UE is configured with a CSI reference window containing multiple time instances (time slots). Specifically, the CSI reference resource window of the serving cell is defined as follows:

[0606] - In the frequency domain, the CSI reference resource window is defined by the group of downlink physical resource blocks corresponding to the frequency band to which the derived CSI is related.

[0607] - In the time domain, the CSI reference resource window for the CSI report in the uplink time slot n' is composed of the downlink time slot window [m,m+W ref -1]Definition.

[0608] In one example, the CSI reference resource window may be configured only when the CSI report is based on a codebook that includes a Doppler component, such as the NR Type II codebook of Release 18 (for time / Doppler compression).

[0609] In one example, the window includes the conventional CSI reference resource slot n ref , defined as:

[0610] Where K offset is a parameter configured by higher layers, as described in clause 4.2 of [6TS 38.213], and where It's K offset The subcarrier spacing configuration is 0 for frequency range 1.

[0611] -in And μ DL and μ UL are the subcarrier spacing configurations for DL ​​and UL, respectively, and and μ offset Determined by the ca-SlotOffset configured by higher layers for the cell transmitting uplink and downlink, as defined in clause 4.5 of [4, TS 38.211].

[0612] In one example, m=n ref .

[0613] In one example, m+W ref -1=n ref .

[0614] In one example, m <n ref And n ref <m+W ref -1.

[0615] In one example, CSI reference resource window = CSI reporting window, i.e. l ​​= m and W CSI =W ref .

[0616] In one example, CSI reference resource window = CSI measurement window, that is, k = m and W meas =W ref .

[0617] In one example, CSI reference resource window = CSI measurement = CSI reporting window, i.e., k = l = m and W meas +W CSI =W ref .

[0618] In one example, CSI reference resource window + CSI measurement window = CSI reporting window, i.e., l = m and W CSI =W meas +W ref and k = m and l = n ref and m+W ref -1=l+W CSI -1.

[0619] In one example, the CSI reference resource window is such that m=n ref And m+W ref -1=n', where n' is the time slot in which the CSI is reported.

[0620] In one example, the CSI reference resource window is such that m=n ref And m+W ref -1=n f , where n f >n′ is the future time slot after the time slot in which the CSI is reported.

[0621] In one example, the CSI reference resource window is such that m=n ref And m+W ref -1=l+W CSI -1.

[0622] In one example, the CSI reference resource window is such that m=n′ and m+W ref -1=n f , where n f >n′ is

[0623] The future time slots after the time slot in which the CSI is reported.

[0624] In one example, the CSI reference resource window is such that m=n′ and m+W ref -1=l+W CSI -1.

[0625] In one example, N 4 =W ref .

[0626] In one example, N 4 =W ref R ST , where R ST ≥1 or <1. R ST The value of N may be fixed or configured (eg, via RRC or MAC CE or DCI). 4 The location of the TD / DD cells corresponds to the CSI reporting / validity window. In one example, for CQI and PMI reporting, R ST The value is the same (ie, one value). In one example, also for CQI and PMI reporting, R ST The values ​​can be different (ie, two separate values).

[0627] In one example, the CQI is expected to be calculated at a slot within the CSI reference resource window and meet the BLER requirement (eg, 0.1), and the PMI is expected to be calculated / valid for all slots or a subset of slots within the CSI reference resource window.

[0628] Or in one example, the CQI is expected to be calculated for all slots or a subset of slots within the CSI reference resource window and meet the BLER requirement (e.g., 0.1), and the PMI is expected to be calculated / valid for all slots or a subset of slots within the CSI reference resource window.

[0629] Fig. 27 An exemplary method 2700 performed by a UE in a wireless communication system according to an embodiment of the present disclosure is shown.

[0630] refer to Fig. 27 , Fig. 27 The method 2700 may be performed by Figure 1 Any one of UEs 111 to 116 (such as Figure 3 UE116) is executed, and the corresponding method can be performed by Figure 3 Any one of BS101 to 103 (such as Figure 2 The method 2700 is for illustration only and other embodiments may be used without departing from the scope of the present disclosure.

[0631] The method starts with the UE receiving configuration information about CSI reporting, which includes information about a time slot set S, X CQIs, and N time slots for CSI reporting (in operation 2710), and determining XCQI based on the N time slots (in operation 2720). For example, the UE may receive configuration information about CSI reporting (or CSI), which includes at least one of at least one time slot for CSI reporting, at least one CQI (or channel state indicator), or at least one time slot corresponding to at least one CQI.

[0632] For example, in at least one variant embodiment, X≥1, N∈S, S includes {1,2}, and the N time slots are from the time slot set S and are associated with X CQIs. The UE then transmits a CSI report (at operation 2730).

[0633] In one embodiment, the CSI report includes (i) an indicator indicating a plurality of precoding matrices and each slot in the set of slots S is associated with one of the plurality of precoding matrices, and (ii) X CQIs.

[0634] Any of the above-described variations may be used independently or in combination with at least one other variation.

[0635] The above flow charts illustrate exemplary methods that can be implemented according to the principles of the present disclosure, and various changes can be made to the methods shown in the flow charts herein. For example, although shown as a series of steps, the individual steps in each figure can overlap, occur in parallel, occur in different orders, or occur multiple times. In another example, a step can be omitted or replaced by another step.

[0636] Although the drawings show different examples of user equipment, various changes may be made to the drawings. For example, the user equipment may include any number of each component in any suitable arrangement. In general, the drawings do not limit the scope of the present disclosure to any particular configuration. In addition, although the drawings show operating environments in which various user equipment features disclosed in this patent document may be used, these features may be used in any other suitable system.

[0637] Although the present disclosure has been described with exemplary embodiments, various changes and modifications may be proposed to those skilled in the art. The present disclosure is intended to include such changes and modifications that fall within the scope of the appended claims. Any description in this application should not be understood to mean that any specific element, step or function is an essential element that must be included within the scope of the claims. The scope of the patent subject matter is defined by the claims.

[0638] According to an embodiment, a user equipment (UE) includes: a transceiver configured to receive a configuration for a channel state information (CSI) report, the configuration including information about (i) a set of time slots S for CSI reporting, (ii) X channel quality indicators (CQIs), and (iii) N time slots, where X≥1, N∈S, S includes {1,2}, and the N time slots are from the time slot set S and are associated with the X CQIs, and a processor operably coupled to the transceiver, based on the configuration, the processor is configured to determine the X CQIs based on the N time slots. The transceiver is also configured to transmit a CSI report, the CSI report including (i) an indicator indicating a plurality of precoding matrices and each time slot in the time slot set S is associated with one of the plurality of precoding matrices, and (ii) the X CQIs.

[0639] When the granularity of CQI in the frequency domain is subband (SB), the CSI report includes X CQIs for each SB in the frequency band associated with the CSI report.

[0640] The configuration further indicates (i) a value of X=1 and N=2 or (ii) a value of X=2, based on a condition that the UE reports capability information indicating support of (i) X=1 and N=2 or (ii) X=2.

[0641] The time slot set S is composed of time slots with indices [l,…,l+W CSI -1] CSI time window of consecutive time slots, l is W CSI The first index in consecutive time slots, W CSI =N 4 d,N 4 is the number of time domain (TD) units, d is the number of time slots in one TD unit, and the configuration indicates l, N 4 and the value of d.

[0642] When X=1 and N=1, one slot associated with a CQI is the first slot l, and when X=1 and N=2, two slots associated with one CQI are the first slot l and the last slot l+W. CSI -1.

[0643] When X=2 and N=2, the two time slots are the first time slot 1 and the time slot And the first time slot l is associated with the first of the two CQIs, and the time slot Associated with the second of the 2 CQIs.

[0644] When N=W CSI When W CSI The time slots are divided into X parts with index i=1,...,X, and the i-th of the X parts includes Ni consecutive time slots and is associated with the i-th of the X CQIs, where or or

[0645] X CQIs meet the block error (BLER) probability requirement at their associated one or more time slots from N time slots, when N 4 =1, X = 1, and when N 4 >1, X≥1.

[0646] According to one embodiment, a base station (BS) includes a processor and a transceiver operably connected to the processor, the transceiver being configured to transmit a configuration regarding a channel state information (CSI) report, the configuration including information regarding (i) a time slot set S for CSI reporting, (ii) X channel quality indicators (CQIs), and (iii) N time slots, where X≥1, N∈S, S includes {1,2}, and the N time slots are from the time slot set S and are associated with the X CQIs, and receive a CSI report including (i) an indicator indicating a plurality of precoding matrices and each time slot in the time slot set S is associated with one of the plurality of precoding matrices, and (ii) the X CQIs.

[0647] When the granularity of CQI in the frequency domain is subband (SB), the CSI report includes X CQIs for each SB in the frequency band associated with the CSI report.

[0648] The transceiver is further configured to receive capability information, and based on the capability information indicating support of the condition of (i) X=1 and N=2 or (ii) X=2, the configuration further indicates (i) values ​​of X=1 and N=2 or (ii) value of N=2.

[0649] The time slot set S is composed of time slots with indices [l,…,l+W CSI -1] CSI time window of consecutive time slots, l is W CSI The first index in consecutive time slots, W CSI =N 4 d,N 4 is the number of time domain (TD) units, d is the number of time slots in one TD unit, and the configuration indicates l, N 4 and the value of d.

[0650] When X=1 and N=1, one slot associated with a CQI is the first slot l, and when X=1 and N=2, two slots associated with one CQI are the first slot l and the last slot l+W. CSI -1.

[0651] When X=2 and N=2, the two time slots are the first time slot 1 and the time slot And the first time slot l is associated with the first of the two CQIs, and the time slot Associated with the second of the 2 CQIs.

[0652] When N=W CSI When W CSI The time slots are divided into X parts with index i=1,...,X, and the i-th of the X parts includes N i consecutive time slots and is associated with the i-th of the X CQIs, where or or

[0653] X CQIs meet the block error (BLER) probability requirement at their associated one or more time slots from N time slots, when N 4 =1, X = 1, and when N 4 >1, X≥1.

[0654] According to one embodiment, a method performed by a user equipment (UE) is provided. The method includes receiving a configuration for a channel state information (CSI) report, the configuration including information about (i) a time slot set S for CSI reporting, (ii) X channel quality indicators (CQIs), and (iii) N time slots, where X≥1, N∈S, S includes {1,2}, and the N time slots are from the time slot set S and are associated with the X CQIs, determining the X CQIs based on the N time slots, and transmitting a CSI report, the CSI report including (i) an indicator indicating a plurality of precoding matrices and each time slot in the time slot set S is associated with one of the plurality of precoding matrices, and (ii) the X CQIs.

[0655] When the granularity of CQI in the frequency domain is subband (SB), the CSI report includes X CQIs for each SB in the frequency band associated with the CSI report.

[0656] The configuration further indicates (i) a value of X=1 and N=2 or (ii) a value of X=2, based on a condition that the UE reports capability information indicating support of (i) X=1 and N=2 or (ii) X=2.

[0657] Among them, the time slot set S includes the time slots with indices [l,…,l+W CSI -1] CSI time window of consecutive time slots, l is W CSI The first index in consecutive time slots, W CSI =N 4 d,N 4is the number of time domain (TD) units, d is the number of time slots in one TD unit, and the configuration indicates l, N 4 and the value of d.

[0658] According to one embodiment, a user equipment (UE) in a wireless communication system is provided. The UE includes a transceiver and a controller, the controller being coupled to the transceiver and configured to: receive configuration information associated with a channel state information (CSI) report from a base station, wherein the CSI report includes information about a time slot set for the CSI report and a channel quality indicator (CQI), determine at least one CQI corresponding to at least one time slot identified from the time slot set for the CSI report, and transmit the CSI report including information about the determined at least one CQI to the base station.

[0659] The controller is further configured to receive a CSI reference signal (RS) of a CSI report from a base station and identify a CQI based on the CSI-RS. At least one CQI corresponding to at least one time slot is identified from the identified CQIs.

[0660] The controller is also configured to: identify the number of at least one window supported by the UE for CSI reporting, and when the number of at least one window supported by the UE is 1, transmit a CSI report including a first CQI corresponding to the at least one window to the base station, and when the number of at least one window supported by the UE is greater than 1, transmit a CSI report including a first CQI corresponding to the first window in the at least one window and a second CQI corresponding to the second window in the at least one window to the base station.

[0661] The CSI report also includes an indicator indicating a plurality of precoding matrices and each time slot associated with one of the plurality of precoding matrices.

[0662] According to one embodiment, a method performed by a user equipment (UE) in a wireless communication system is provided. The method includes: receiving configuration information associated with a channel state information (CSI) report from a base station, wherein the CSI report includes information about a time slot set for the CSI report and a channel quality indicator (CQI), determining at least one CQI corresponding to at least one time slot identified from the time slot set for the CSI report, and transmitting the CSI report including information about the determined at least one CQI to the base station.

[0663] The method also includes receiving a CSI reference signal (RS) of a CSI report from a base station, and identifying a CQI based on the CSI-RS. At least one CQI corresponding to at least one time slot is identified from the identified CQIs.

[0664] The method also includes: identifying the number of at least one window supported by the UE for CSI reporting, and when the number of at least one window supported by the UE is 1, transmitting a CSI report including a first CQI corresponding to the at least one window to the base station, and when the number of at least one window supported by the UE is greater than 1, transmitting a CSI report including a first CQI corresponding to the first window in the at least one window and a second CQI corresponding to the second window in the at least one window to the base station.

[0665] The CSI report also includes an indicator indicating a plurality of precoding matrices and each time slot associated with one of the plurality of precoding matrices.

[0666] According to one embodiment, a base station in a wireless communication system is provided. The base station includes a transceiver and a controller, the controller being coupled to the transceiver and configured to transmit configuration information associated with a channel state information (CSI) report to a user equipment (UE), wherein the CSI report includes information about a time slot set for the CSI report and a channel quality indicator (CQI), and receive a CSI report from the UE, the CSI report including information about at least one CQI associated with at least one time slot in the time slot set for the CSI report.

[0667] The controller is also configured to receive UE capabilities from the UE, the UE capabilities including information about a number of at least one window for CSI reporting supported by the UE.

[0668] In the case where the number of at least one window supported by the UE is 1, the CSI report includes a first CQI corresponding to the at least one window. In the case where the number of at least one window supported by the UE is more than one, the CSI report includes a first CQI corresponding to the first window in the at least one window and a second CQI corresponding to the second window in the at least one window.

[0669] The CSI report also includes an indicator indicating a plurality of precoding matrices and each time slot associated with one of the plurality of precoding matrices.

[0670] According to one embodiment, a method performed by a base station in a wireless communication system is provided. The method includes transmitting configuration information associated with a channel state information (CSI) report to a user equipment (UE), wherein the CSI report includes information about a time slot set for the CSI report and a channel quality indicator (CQI), and receiving a CSI report from the UE, the CSI report including information about at least one CQI associated with at least one time slot in the time slot set for the CSI report.

[0671] The method also includes receiving UE capabilities from the UE, the UE capabilities including information about a number of at least one window for CSI reporting supported by the UE.

[0672] In the case where the number of at least one window supported by the UE is 1, the CSI report includes a first CQI corresponding to the at least one window. In the case where the number of at least one window supported by the UE is more than one, the CSI report includes a first CQI corresponding to the first window in the at least one window and a second CQI corresponding to the second window in the at least one window.

[0673] Fig.28 The structure of a UE according to an embodiment of the present disclosure is shown.

[0674] like Fig.28 As shown, the UE according to the embodiment may include a transceiver 2810, a memory 2820, and a processor 2830. The transceiver 2810, the memory 2820, and the processor 2830 of the UE may operate according to the communication method of the above-mentioned UE. However, the components of the UE are not limited thereto. For example, the UE may include more or fewer components than the above-mentioned components. In addition, the processor 2830, the transceiver 2810, and the memory 2820 may be implemented as a single chip. In addition, the processor 2830 may include at least one processor. In addition, Fig.28 The UEs correspond to Figure 1 UEs 111 to 116.

[0675] The transceiver 2810 is collectively referred to as a UE receiver and a UE transmitter, and can transmit signals to / receive signals from a base station or a network entity. The signals transmitted to or received from a base station or a network entity may include control information and data. The transceiver 2810 may include an RF transmitter for up-converting and amplifying the transmitted signal, and an RF receiver for low-noise amplification and down-conversion of the received signal. However, this is only an example of the transceiver 2810, and the components of the transceiver 2810 are not limited to the RF transmitter and the RF receiver.

[0676] In addition, the transceiver 2810 may receive a signal through a wireless channel and output it to the processor 2830 , and transmit a signal output from the processor 2830 through a wireless channel.

[0677] The memory 2820 may store programs and data required for the operation of the UE. In addition, the memory 2820 may store control information or data included in a signal obtained by the UE. The memory 2820 may be a storage medium such as a read-only memory (ROM), a random access memory (RAM), a hard disk, a CD-ROM, and a DVD, or a combination of storage media.

[0678] The processor 2830 may control a series of processes so that the UE operates as described above. For example, the transceiver 2810 may receive a data signal including a control signal transmitted by a base station or a network entity, and the processor 2830 may determine a result of receiving the control signal and the data signal transmitted by the base station or the network entity.

[0679] Fig.29 The structure of a base station according to an embodiment of the present disclosure is shown.

[0680] like Fig.29 As shown, the base station according to the embodiment may include a transceiver 2910, a memory 2920 and a processor 2930. The transceiver 2910, the memory 2920 and the processor 2930 of the base station may operate according to the communication method of the above-mentioned base station. However, the components of the base station are not limited thereto. For example, the base station may include more or fewer components than the above-mentioned components. In addition, the processor 2930, the transceiver 2910 and the memory 2920 may be implemented as a single chip. In addition, the processor 2930 may include at least one processor. In addition, Fig.29 The base station corresponds to Figure 1 Base stations 101 to 103.

[0681] The transceiver 2910 is collectively referred to as a base station receiver and a base station transmitter, and can transmit signals to / receive signals from a terminal (UE) or a network entity. The signals transmitted to or received from a terminal or a network entity may include control information and data. The transceiver 2910 may include an RF transmitter for up-converting and amplifying the transmitted signal, and an RF receiver for amplifying low noise and down-converting the received signal. However, this is only an example of the transceiver 2910, and the components of the transceiver 2910 are not limited to the RF transmitter and the RF receiver.

[0682] In addition, the transceiver 2910 may receive a signal through a wireless channel and output it to the processor 2930 , and transmit a signal output from the processor 2930 through a wireless channel.

[0683] The memory 2920 may store programs and data required for the operation of the base station. In addition, the memory 2920 may store control information or data included in a signal obtained by the base station. The memory 2920 may be a storage medium such as a read-only memory (ROM), a random access memory (RAM), a hard disk, a CD-ROM, and a DVD, or a combination of storage media.

[0684] The processor 2930 may control a series of processes so that the base station operates as described above. For example, the transceiver 2910 may receive a data signal including a control signal transmitted by a terminal, and the processor 2930 may determine a result of receiving the control signal and the data signal transmitted by the terminal.

Claims

1. A user equipment UE in a wireless communication system, the UE comprising: Transceiver; as well as A controller is coupled to the transceiver and is configured to: receiving configuration information associated with a channel state information (CSI) report from a base station, wherein the CSI report includes information related to a set of time slots used for the CSI report and a channel quality indicator (CQI), determining at least one CQI, the at least one CQI corresponding to at least one timeslot identified from the set of timeslots used for the CSI reporting, and The CSI report is transmitted to the base station, the CSI report including information related to the determined at least one CQI.

2. The UE according to claim 1, wherein: The controller is also configured to: receiving a CSI reference signal RS for the CSI report from the base station, and identifying a CQI based on the CSI-RS, and The at least one CQI corresponding to the at least one time slot is identified from the identified CQIs.

3. The UE according to claim 1, wherein: The controller is also configured to: identifying a number of at least one window supported by the UE for the CSI reporting, In a case where the number of the at least one window supported by the UE is 1, transmitting the CSI report to the base station, the CSI report including a first CQI corresponding to the at least one window, and In a case where the number of the at least one windows supported by the UE is greater than 1, the CSI report is transmitted to the base station, the CSI report including a first CQI corresponding to a first window of the at least one window and a second CQI corresponding to a second window of the at least one window.

4. The UE according to claim 1, wherein: The CSI report also includes an indicator indicating a plurality of precoding matrices and each time slot associated with one of the plurality of precoding matrices.

5. A method performed by a user equipment UE in a wireless communication system, the method comprising: receiving configuration information associated with a channel state information (CSI) report from a base station, wherein the CSI report includes information related to a set of time slots used for the CSI report and a channel quality indicator (CQI), determining at least one CQI, the at least one CQI corresponding to at least one timeslot identified from the set of timeslots used for the CSI reporting, and The CSI report is transmitted to the base station, the CSI report including information related to the determined at least one CQI.

6. The method of claim 5, further comprising: receiving a CSI reference signal RS for the CSI report from the base station, and identifying a CQI based on the CSI-RS, and The at least one CQI corresponding to the at least one time slot is identified from the identified CQIs.

7. The method of claim 5, further comprising: identifying a number of at least one window supported by the UE for the CSI reporting, In a case where the number of the at least one window supported by the UE is 1, transmitting the CSI report to the base station, the CSI report including a first CQI corresponding to the at least one window, and In a case where the number of the at least one windows supported by the UE is greater than 1, the CSI report is transmitted to the base station, the CSI report including a first CQI corresponding to a first window of the at least one window and a second CQI corresponding to a second window of the at least one window.

8. The method of claim 5, wherein: The CSI report also includes an indicator indicating a plurality of precoding matrices and each time slot associated with one of the plurality of precoding matrices.

9. A base station in a wireless communication system, the base station comprising: Transceiver; as well as a controller coupled to the transceiver and configured to: transmitting configuration information associated with a channel state information (CSI) report to a user equipment (UE), wherein the CSI report comprises information related to a set of time slots used for the CSI report and a channel quality indicator (CQI), and The CSI report is received from the UE, the CSI report comprising information related to at least one CQI associated with at least one time slot in the set of time slots used for the CSI report.

10. The base station according to claim 9, wherein: The controller is also configured to: UE capabilities are received from the UE, the UE capabilities comprising information related to a number of at least one window supported by the UE for the CSI report.

11. The base station according to claim 10, wherein: In a case where the number of the at least one window supported by the UE is 1, the CSI report includes a first CQI corresponding to the at least one window, and Wherein, when the number of the at least one window supported by the UE is greater than 1, the CSI report includes a first CQI corresponding to a first window in the at least one window and a second CQI corresponding to a second window in the at least one window.

12. The base station according to claim 9, wherein: The CSI report also includes an indicator indicating a plurality of precoding matrices and each time slot associated with one of the plurality of precoding matrices.

13. A method performed by a base station in a wireless communication system, the method comprising: transmitting configuration information associated with a channel state information (CSI) report to a user equipment (UE), wherein the CSI report comprises information related to a set of time slots used for the CSI report and a channel quality indicator (CQI), and The CSI report is received from the UE, the CSI report comprising information related to at least one CQI associated with at least one time slot in the set of time slots used for the CSI report.

14. The method of claim 13, further comprising: UE capabilities are received from the UE, the UE capabilities comprising information related to a number of at least one window supported by the UE for the CSI report.

15. The method of claim 14, wherein: In a case where the number of the at least one window supported by the UE is 1, the CSI report includes a first CQI corresponding to the at least one window, and Wherein, when the number of the at least one window supported by the UE is greater than 1, the CSI report includes a first CQI corresponding to a first window in the at least one window and a second CQI corresponding to a second window in the at least one window.

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