Methods 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. According to an embodiment, 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 about a channel state information (CSI) report from a base station, the configuration information including a set of time slots for which the CSI report is valid, at least one CSI reference resource, and an uplink (UL) time slot, determining a CSI report for the identified set of time slots based on the configuration information, and transmitting the CSI report to the base station in the UL time slot. The set of time slots includes at least one time slot following a reference time slot of the CSI reference resource.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communication systems, and more particularly, to methods 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 called millimeter waves (mmWave) including 28 GHz and 39 GHz. In addition, it has been considered to implement 6G mobile communication technology (called Beyond 5G System) in terahertz frequency bands (e.g., 95 GHz to 3 terahertz (THz) frequency bands) in order to achieve a transmission rate 50 times faster than 5G mobile communication technology and an ultra-low latency of one tenth of 5G.

[0003] At the beginning of the development of 5G mobile communication technology, in order to support services and meet performance requirements related to enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication (URLLC), and massive machine type communication (mMTC), standardization is underway on the following technologies: beamforming and massive MIMO for mitigating radio wave path loss and increasing radio wave transmission distance in millimeter waves, support for parameter sets (e.g., operating multiple subcarrier intervals) 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 BWP (bandwidth part), new channel coding methods such as LDPC (low-density parity check) codes for large-scale data transmission and polar codes for highly reliable transmission of control information, L2 preprocessing, and network slicing for providing dedicated networks dedicated to specific services.

[0004] Currently, in view of the services that 5G mobile communication technology will support, discussions are ongoing on improvements and performance enhancements of initial 5G mobile communication technology, and there is already physical layer standardization on technologies such as: V2X (Vehicle to Everything) for assisting driving determination of autonomous vehicles based on information about the location and status of the vehicle sent by the vehicle and for enhancing user convenience, NR-U (New Radio Unlicensed) for system operation in unlicensed frequency bands that complies with various regulatory requirements, NR UE power saving, NTN (Non-Terrestrial Network), which is UE-satellite direct communication for providing coverage in areas where communication with terrestrial networks is unavailable, and positioning.

[0005] In addition, in terms of air interface architecture / protocol, standardization is being conducted on technologies such as the Industrial Internet of Things (IIoT) for supporting new services through interworking and integration with other industries, IAB (Integrated Access and Backhaul) for providing 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 (NR's 2-step RACH) for simplifying the random access procedure. Standardization is also being conducted on technologies such as the 5G baseline architecture (e.g., service-based architecture or service-based interface) for combining network function virtualization (NFV) and software defined network (SDN) technologies, and mobile edge computing (MEC) for receiving services based on UE location.

[0006] As 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 enhanced functions and performance of the 5G mobile communication system and integrated operations of the connected devices will be necessary. To this end, new research related to the following technologies is planned: extended reality (XR) for effectively supporting AR (augmented reality), VR (virtual reality), MR (mixed reality), etc., 5G performance improvement and complexity reduction by utilizing artificial intelligence (AI) and machine learning (ML), AI service support, metaverse service support, and drone communication.

[0007] Furthermore, such development of 5G mobile communication systems will serve as a foundation for developing not only new waveforms for providing coverage in the terahertz band for 6G mobile communication technology, multi-antenna transmission technologies (such as full-dimensional MIMO (FD-MIMO), array antennas, and massive antennas), metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional spatial multiplexing technologies using OAM (orbital angular momentum), and RIS (reconfigurable smart surfaces), but also full-duplex technologies for improving the frequency efficiency of 6G mobile communication technology and improving system networks, AI-based communication technologies for achieving system optimization by utilizing satellites and AI from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technologies for achieving services with a complexity level that exceeds the operational capability limits of UEs 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 is coupled to the transceiver and is configured to receive configuration information about a channel state information (CSI) report from a base station, the configuration information including a set of time slots for which the CSI report is valid, at least one CSI reference resource, and an uplink (UL) time slot, determine a CSI report for the set of identified time slots based on the configuration information, and send the CSI report to the base station in the UL time slot. The set of time slots includes at least one time slot after a reference time slot of the CSI reference resource.

[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 about a channel state information (CSI) report from a base station, the configuration information including a set of time slots for which the CSI report is valid, at least one CSI reference resource, and an uplink (UL) time slot, determining a CSI report for the set of identified time slots based on the configuration information, and sending the CSI report to the base station in the UL time slot. The set of time slots includes at least one time slot after a reference time slot of the CSI reference resource.

[0011] According to an embodiment, a base station (BS) in a wireless communication system is provided. The BS includes a transceiver and a controller coupled to the transceiver, the controller being configured to identify configuration information about a channel state information (CSI) report, the configuration information including a set of time slots for which the CSI report is valid, at least one CSI reference resource, and an uplink (UL) time slot, send the configuration information to a user equipment (UE), and receive the CSI report from the UE in the UL time slot. The set of time slots includes at least one time slot after a reference time slot of the CSI reference resource.

[0012] According to an embodiment, a method performed by a base station (BS) in a wireless communication system is provided. The method includes: identifying configuration information about a channel state information (CSI) report, the configuration information including a set of time slots for which the CSI report is valid, at least one CSI reference resource, and an uplink (UL) time slot, sending the configuration information to a user equipment (UE), and receiving the CSI report from the UE in the UL time slot. The set of time slots includes at least one time slot after a reference time slot of the CSI reference resource. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, wherein like reference numerals represent like parts:

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

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

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

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

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

[0019] Figure 6 A transmitter block diagram of 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 of a PDSCH in a subframe according to an embodiment of the present disclosure is shown;

[0021] Figure 8 A transmitter block diagram of 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 of a PUSCH in a subframe according to an embodiment of the present disclosure is shown;

[0023] Fig.10 An example antenna block or array for forming a beam 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 example antenna port layout according to an embodiment of the present disclosure is shown;

[0026] Fig.13 shows a 3D grid of oversampled discrete Fourier transform (DFT) beams according to an embodiment of the present disclosure;

[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.15UE moves on a linear trajectory in a distributed MIMO (D-MIMO) system according to an embodiment of the present disclosure;

[0029] Fig.16 FIG. 1 shows a method configured to determine N based on a value B in a CSI-RS burst according to an embodiment of the present disclosure. 4 An example of a UE with a value of

[0030] Fig.17 An 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;

[0031] Fig.18 An example of a UE configured to measure a CSI-RS burst based on an NZP CSI-RS resource within a measurement 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 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;

[0037] Fig.24 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

[0038] Fig.25 An example method performed by a UE in a wireless communication system according to an embodiment of the present disclosure is shown;

[0039] Fig.26 shows the structure of a UE according to an embodiment of the present disclosure; and

[0040] Fig. 27 The structure of a base station according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0041] Discussed below Figures 1 to 27 , and the various embodiments used in this patent document to describe the principles of the present disclosure are merely exemplary and should not be interpreted in any way to limit the scope of the present disclosure. Those skilled in the art will understand that the principles of the present disclosure can be implemented in any suitably arranged system or device.

[0042] The following documents and standard descriptions are incorporated by reference into the present disclosure as if fully set forth herein: 3GPP TS 36.211 v17.0.0, "EUTRA, Physical Channels and Modulation" (referred to herein as "Reference 1"); 3GPP TS 36.212 v17.0.0, "EUTRA, Multiplexing and Channel Coding" (referred to herein as "Reference 2"); 3GPP TS 36.213 v17.0.0, "EUTRA, Physical Layer Procedures" (referred to herein as "Reference 3"); 3GPP TS 36.321 v17.0.0, "E-UTRA, Medium Access Control (MAC) Protocol Specification" (referred to herein as "Reference 4"); 3GPP TS 36.331 v17.0.0, "EUTRA, Radio Resource Control (RRC) Protocol Specification" (referred to herein as "Reference 5"); 3GPP TR 22.891v1.2.0 (referred to herein as “Reference 6”); 3GPP TS38.212v17.0.0, “E-UTRA, NR, Multiplexing and Channel Coding” (referred to herein as “Reference 7”); 3GPP TS38.214v17.0.0; “NR, Physical Layer Procedures for Data” (referred to herein as “Reference 8”); RP-192978, “Doppler Spectrum Measurement Results and Related CSI Enhancement for Various UE Mobility Environments”, Fraunhofer IIS, Fraunhofer HHI, Deutsche Telekom (referred to herein as “Reference 9”); 3GPP TS 38.211v17.0.0 and “E-UTRA, NR, Physical Channels and Modulation” (referred to herein as “Reference 10”).

[0043] Wireless communication is one of the most successful innovations in modern history. Recently, the number of subscribers to wireless communication services exceeded 5 billion and continues to grow rapidly. Due to the increasing popularity of smartphones and other mobile data devices (such as tablets, "notepad" computers, netbooks, e-book readers and machine-type devices) among consumers and enterprises, the demand for wireless data services is growing rapidly. In order to meet the high growth of mobile data services and support new applications and deployments, improving radio interface efficiency and coverage is critical.

[0044] In order to meet the increased demand for wireless data services since the deployment of 4G communication systems, and to realize various vertical applications, 5G / NR communication systems have been developed and are currently being deployed. 5G / NR communication systems are considered to be implemented in high-frequency (millimeter wave) bands (e.g., 28 GHz or 60 GHz bands) to achieve high data rates, or in low-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 massive antenna technology are discussed in 5G / NR communication systems.

[0045] In addition, in the 5G / NR communication system, system network improvements are being developed based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP), receiving-end interference cancellation, etc.

[0046] The discussion of 5G systems and frequency bands associated therewith is for reference, 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 versions of deployments that may use terahertz (THz) frequency bands.

[0047] The following Figure 1-Figure 3 Various embodiments are described that are implemented in a wireless communication system and using Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) communication techniques. Figure 1-Figure 3 The description is not meant 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.

[0048] Fifth generation (5G) or new radio (NR) mobile communications have been gathering more and more momentum recently with all the global technical activities from industry and academia regarding various candidate technologies. Candidate enablers for 5G / NR mobile communications include massive antenna technologies from traditional cellular frequency bands to high frequencies to provide beamforming gain and support increased capacity, new waveforms (e.g., new radio access technologies (RATs)) to flexibly accommodate various services / applications with different requirements, new multiple access schemes to support massive connections, and so on.

[0049] The present disclosure relates to apparatus and methods for CSI reference resources and reporting windows.

[0050] In one embodiment, a user equipment (UE) is provided. The UE includes a transceiver configured to receive a configuration regarding a CSI report. The configuration includes information indicating (i) a set of time slots for which the CSI report is valid, (ii) a CSI reference resource, and (iii) an uplink (UL) time slot nω. The UE also includes a processor operably coupled to the transceiver, the processor configured to identify a set of time slots and a CSI reference resource based on the configuration, and to determine a CSI report for the identified set of time slots based on the CSI reference resource. The transceiver is also configured to send a CSI report in the UL time slot nω. The set of time slots includes a time slot n of the CSI reference resource. ref At least one time slot i after that, which means n ref <i。

[0051] In another embodiment, a base station (BS) is provided. The BS includes a processor configured to generate a configuration regarding a CSI report. The configuration includes information indicating (i) a set of time slots for which the CSI report is valid, (ii) a CSI reference resource, and (iii) a UL time slot n′. The BS also includes a transceiver operably coupled to the processor. The transceiver is configured to send the configuration and receive a CSI report in a UL time slot n′. The CSI report is based on the CSI reference resource and is valid for the set of time slots. The set of time slots includes the time slot n of the CSI reference resource. ref At least one time slot i after that, which means n ref <i。

[0052] In yet another embodiment, a method performed by a UE is provided. The method includes receiving a configuration regarding a CSI report. The configuration includes information indicating (i) a set of time slots for which the CSI report is valid, (ii) a CSI reference resource, and (iii) an uplink (UL) time slot n′. The method also includes, based on the configuration, identifying the set of time slots and the CSI reference resource, and determining a CSI report for the identified set of time slots based on the CSI reference resource. The method includes sending the CSI report in UL time slot n′. The set of time slots includes time slot n of the CSI reference resource. ref At least one time slot i after that, which means n ref <i。

[0053] Other technical features will be apparent to those skilled in the art from the following drawings, description and claims.

[0054] Before proceeding to the following detailed description, it may be advantageous to set forth the definitions of certain words and phrases used in this patent document. The term "coupling" 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 "send", "receive" and "communication" and their derivatives include direct and indirect communication. The terms "include" and "comprise" and their derivatives mean unlimited inclusion. The term "or" is inclusive, meaning and / or. The phrase "associated with..." and its derivatives refer to including, being included in, interconnected with, including, being included in, connected to or connected with, coupled to or coupled with, communicable with, cooperating with, interweaving, juxtaposing, approaching, being combined with or combined with, having, having... attributes, having a relationship with or having 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 with hardware or a combination of hardware and software and / or firmware. The functions associated with any particular controller can be centralized or distributed, whether local or remote. When used with a list of items, the phrase "at least one of" means that various combinations of one or more of the listed items may be used, and only one of the items in the list may be required. For example,

[0055] “At least one of A, B, and C” includes any combination of A, B, C, A and B, A and C, B and C, and A, B, and C.

[0056] 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 embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, processes, functions, objects, classes, instances, related data or parts thereof suitable for implementation in 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 media does not include wired, wireless, optical or other communication links that transmit temporary electrical signals or other signals. Non-transitory computer-readable media include media that can permanently store data and media that can store data and overwrite it later, such as rewritable optical discs or erasable storage devices.

[0057] Definitions for other specific 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.

[0058] An apparatus and method for channel state information (CSI) reference resources and reporting windows are provided. A method performed by a user equipment (UE) includes receiving a configuration regarding a CSI report. The configuration includes information indicating (i) a set of time slots for which the CSI report is valid, (ii) a CSI reference resource, and (iii) an uplink (UL) time slot n′. The method also includes identifying the set of time slots and the CSI reference resource based on the configuration, and determining a CSI report for the identified set of time slots based on the CSI reference resource. The method includes sending the CSI report in UL time slot n′. The set of time slots includes time slot n of the CSI reference resource. ref At least one time slot i after that, which means n ref <i。

[0059] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown. Figure 1 The embodiment of the wireless network shown 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 1As 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) within coverage area 120 of gNB 102. The first plurality of UEs includes 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 101-103 may communicate with each other and with UEs 111-116 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 collection 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 enabled devices. The base station may provide wireless access according to one or more wireless communication protocols (e.g., 5G / NR Third Generation Partnership Project (3GPP) NR, Long Term Evolution (LTE), Advanced LTE (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 approximately circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with gNBs, 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 111-116 include circuitry, programming, or a combination thereof for supporting CSI reference resources and reporting windows. In certain embodiments, one or more of the BSs 101-103 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 wireless broadband access to network 130 to these UEs. Similarly, each gNB 102-103 may communicate directly with network 130 and provide direct wireless broadband access to network 130 to the UEs. 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 example gNB 102 is shown according to an embodiment of the present disclosure. Figure 2 The embodiment of gNB 102 shown is for illustration only, and Figure 1 gNBs 101 and 103 may have the same or similar configurations. However, gNBs have various configurations, and Figure 2 There is no intent to limit the scope of this disclosure to any particular implementation of a gNB.

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

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

[0069] The controller / processor 225 and / or transmit (TX) processing circuitry in the transceivers 210a-210n receive 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 a processed baseband or IF signal. The transceivers 210a-210n up-convert the baseband or IF signal to an RF signal that is 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-210n according to 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-205n are weighted differently to effectively direct the outgoing signals in a desired direction. As another example, the controller / processor 225 may support methods for CSI reference resources and reporting windows. The controller / processor 225 may support any of a variety of other functions in the gNB 102.

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

[0072] The controller / processor 225 is also coupled 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 network. The interface 235 can support communication over any suitable 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 that supports communication over a wired or wireless connection, such as Ethernet or a transceiver.

[0073] Memory 230 is coupled to controller / processor 225. Portions of memory 230 may include RAM, while other portions 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 example 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 111-115 may have the same or similar configurations. However, UEs have a variety of configurations, and Figure 3 The scope of the present disclosure is not limited to any particular implementation of a 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 from antenna 305 transmitted by a gNB of network 100. 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 transmits 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 circuit in the transceiver 310 and / or the processor 340 receives analog or digital voice data from the microphone 320, or receives other outgoing baseband data (such as network data, email, or interactive video game data) from the processor 340. The TX processing circuit 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, according to well-known principles, the processor 340 may control the reception of DL channel signals and the transmission of UL channel signals by the transceiver 310. 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 can perform processes that utilize CSI reference resources and reporting windows as described in the embodiments of the present disclosure. The processor 340 can move data into or out of the memory 360 as needed for the execution process. 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 the 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 the communication path between these accessories and the processor 340.

[0081] Processor 340 is also coupled to input 350 including, for example, a touch screen, a keyboard, 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. Portions of memory 360 may include random access memory (RAM), while other portions 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. In addition, 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 example 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 BS 102), while Figure 5 The receiving path 500 may be described as being implemented in a UE, such as UE 116. However, it is understood that the receiving path 500 may be implemented in a BS and the transmitting path 400 may be implemented in a UE. In some embodiments, the receiving 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 5 The receive path 500 shown includes a downconverter (DC) 555, a cyclic prefix removal 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 4As 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 using quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) to generate a frequency domain modulation symbol sequence. The serial-to-parallel block 410 converts (such as demultiplexes) the serial modulation 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. The up-converter 430 modulates (such as up-converts) the output of the add cyclic prefix block 425 to an RF frequency for transmission via a wireless channel. The signal may also be filtered at baseband before 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 cyclic prefix removal 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 into 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 modulation symbols to recover the original input data stream.

[0089] Each of BS101-103 can be implemented as follows Figure 4 The transmission path 400 shown is similar to the transmission to UE 111-116 in the downlink and can be implemented as follows Figure 5 Receive path 500 is shown, which is similar to receiving in the uplink from UE 111-116. Similarly, each of UE 111-116 may implement transmit path 400 for transmitting in the uplink to BS 101-103, and may implement receive path 500 for receiving in the downlink from BS 101-103.

[0090] Figure 4 and Figure 5 Each component in may be implemented using hardware or a combination of hardware and software / firmware. As a specific example, Figure 4 and Figure 5 At least some components in can be implemented with 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 configurable software algorithms, where the value of size N can be modified according to the implementation.

[0091] In addition, although described as using FFT and IFFT, this is exemplary only 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 for DFT and IDFT functions, the value of variable N may be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N may be any integer of a power of 2 (such as 1, 2, 4, 8, 16, etc.).

[0092] although Figure 4 and Figure 5 An example of a wireless transmit and receive path is shown, but the 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) that transmits signals from a transmission point such as a base station (BS) or NodeB to a user equipment (UE) and an uplink (UL) that transmits signals from a UE to a reception point such as a NodeB. A UE is also commonly referred to as a terminal or mobile station, which can be fixed or mobile and can be a cellular phone, a personal computer device, or an automation device. An eNodeB is typically a fixed station and 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 referred to as a pilot signal. The eNodeB transmits data information via a physical DL shared channel (PDSCH). The eNodeB transmits DCI via a physical DL control channel (PDCCH) or an enhanced PDCCH (EPDCCH), see also reference 3. In response to a data transmission block (TB) transmission from a UE, the eNodeB transmits confirmation information in a physical hybrid ARQ indicator channel (PHICH). 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. In order to reduce CRS overhead, the eNodeB may transmit the CSI-RS in the time domain and / or frequency domain at a smaller 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 of a DL channel is called a subframe and may have a duration of, for example, 1 millisecond.

[0095] DL signals also include 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 transmission channel called a broadcast channel (BCH), or when the DL signal transmits a system information block (SIB), it is mapped to a DL shared channel (DL-SCH). Most system information is included in different SIBs sent using DL-SCH. The presence of system information on the DL-SCH in a subframe can be indicated by the transmission of the corresponding PDCCH, which transmits a codeword with a cyclic redundancy check (CRC) scrambled with a system information RNTI (SI-RNTI). Alternatively, scheduling information for SIB transmissions 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 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. One RB unit on a subframe is called a PRB. For PDSCH transmission BW, a UE can be allocated M PDSCH RBs, total RE.

[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 sends 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 sends the SRS to provide the eNodeB with UL CSI. The UE sends data information or UCI through the corresponding 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, which indicates the correct (ACK) or incorrect (NACK) detection of a data TB in the PDSCH or the absence of a 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), which enables the eNodeB to perform link adaptation for PDSCH transmission to the UE. HARQ-ACK information is also sent by the UE in response to detecting a PDCCH / EPDCCH indicating the release of a semi-persistently scheduled PDSCH (see also reference 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. symbols. The frequency resource unit of the UL system BW is RB. For the transmission BW, the UE is allocated N RB RBs, total 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 according to an embodiment of the present disclosure is shown. Figure 6 The embodiment of transmitter block diagram 600 shown in FIG. 6 is for illustration only. Figure 6 One or more of the components shown in the 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 6The 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 (e.g., 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 transmission BW selection unit 655 for the assigned PDSCH transmission BW, a unit 660 applies an inverse fast Fourier transform (IFFT), and then the output is serialized by a parallel-to-serial (P / S) converter 670 to create a time domain signal, filtered by a filter 680, and the signal is transmitted 690. Additional functions such as data scrambling, cyclic prefix insertion, time windowing, interleaving, and others are well known in the art and are not shown for simplicity.

[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 in FIG. 7 is for illustration only. Figure 7 One or more of the components shown in the 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, a received signal 710 is filtered by a filter 720, an RE 730 for an assigned receive BW is selected by a BW selector 735, a fast Fourier transform (FFT) is applied by a unit 740, and the output is serialized by a parallel-to-serial converter 750. Subsequently, a demodulator 760 coherently demodulates the data symbols by applying a channel estimate obtained from a DMRS or CRS (not shown), and a 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 according to an embodiment of the present disclosure is shown. Figure 8 One or more of the components shown in the 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 8The embodiment of block diagram 800 shown in FIG. 8 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, REs 850 corresponding to the assigned PUSCH transmission BW are selected by a transmission BW selection unit 855, an IFFT is applied by a unit 860, 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 in the 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, the received signal 910 is filtered by a filter 920. Subsequently, after removing the cyclic prefix (not shown), a unit 930 applies FFT, REs 940 corresponding to the assigned PUSCH receive BW are selected by a receive BW selector 945, a unit 950 applies an inverse DFT (IDFT), a demodulator 960 coherently demodulates the data symbols by applying a channel estimate obtained from a DMRS (not shown), and a decoder 970, such as a turbo decoder, decodes the demodulated data to provide an estimate of the information data bits 980.

[0107] In the next generation of cellular systems, various use cases are envisioned that exceed the capabilities of LTE systems. For the so-called 5G or fifth generation cellular systems, systems capable of operating both below 6 GHz and above 6 GHz (e.g., in the mmWave regime) 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 divided into three different groups. The first group is called "enhanced mobile broadband (eMBB)" and is targeted at high data rate services with less stringent latency and reliability requirements. The second group is called "ultra-reliable and low latency (URLL)" and is targeted at applications with less stringent data rate requirements but lower tolerance for latency. The third group is called "massive MTC (mMTC)" and is targeted at a large number of low-power device connections, such as 1 million per square kilometer, with less stringent reliability, data rate and latency requirements.

[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 may remain the same or increase.

[0109] Fig.10 An example antenna block or array 1000 is shown in accordance with an embodiment of the present 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 antenna blocks or arrays.

[0110] For mmWave bands, although 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) tends to be limited by hardware constraints (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 group of analog phase shifters 1001. Then, one CSI-RS port can correspond to a subarray, which produces a narrow analog beam through analog beamforming. By changing the phase shifter group across symbols or subframes, the analog beam 1005 can be configured to sweep across a wider angle 1020. 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 spans N CSI-PORT A linear combination is performed between the 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 crucial factor. To this end, three types of CSI reporting mechanisms corresponding to the three types of CSI-RS measurements can be considered: 1) "Class A" CSI report, which corresponds to non-precoded CSI-RS, 2) "Class B" report with CSI-RS resources with K=1, which corresponds to UE-specific beamformed CSI-RS, 3) "Class B" report with CSI-RS resources with K>1, which corresponds to cell-specific beamformed 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 typically have cell-wide coverage. For beamformed CSI-RS, cell-specific or UE-specific beamforming operations are applied on non-zero power (NZP) CSI-RS resources (including multiple ports). Here, (at least at a given time / frequency) the CSI-RS ports have narrow beamwidths and thus no cell-wide coverage, and (at least from the eNB (or gNB) perspective) at least some CSI-RS port-resource combinations have different beam directions.

[0112] In scenarios where the 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 such a process, a first BF CSI-RS is sent with a period T1 (ms) and a second NP CSI-RS is sent with a period 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 considered to be an essential feature to achieve high system throughput requirements. One of the key components of a MIMO transmission scheme is accurate CSI acquisition at the eNB (or gNB) (or TRP). In particular, for MU-MIMO, the availability of accurate CSI is necessary to guarantee high MU performance. For TDD systems, CSI can be acquired using SRS transmissions that rely 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 conventional FDD systems, the CSI feedback framework is "implicit" in the form of CQI / PMI / RI (also CRI and LI) derived from a codebook assuming SU transmissions from the eNB (or gNB).

[0114] In 5G or NR systems [Ref. 7, Ref. 8], the above-mentioned “implicit” CSI reporting paradigm from LTE is also supported and is referred to as Type I CSI reporting. In addition, high-resolution CSI reporting, referred to as Type IICSI 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, the overhead of Type IICSI reporting may be a problem in practical UE implementations. One approach to reduce the overhead of Type IICSI is based on frequency domain (FD) compression. In Release 16 NR, DFT-based FD compression of Type IICSI is already supported (referred to as Release 16 enhanced Type II codebook in Ref. 8). Some key parts 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 reciprocity or partial reciprocity does exist between UL and DL, some of the CSI components can be obtained based on the UL channel estimated using the SRS transmission from the UE. In Release 16 NR, DFT-based FD compression is extended to this partial reciprocity case (referred to as Release 16 enhanced Type II port selection codebook in Ref. 8), where W 1 The DFT-based SD basis in is replaced by SD CSI-RS port selection, i.e., L out of the CSI-RS ports are selected (the selection is common for both antenna polarizations or both halves of the CSI-RS ports). In this case, the CSI-RS ports are beamformed in SD (assuming UL-DL channel reciprocity in the angular 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 UL-DL channel reciprocity can exist in both the angle domain and the delay domain if the UL-DL duplex distance is small. Since the delay in the time domain transforms (or is closely related to) the basis vectors in the frequency domain (FD), the Release 16 enhanced Type II port selection can be further extended to both the angle and delay domains (or SD and FD). Specifically, W 1 The DFT-based SD basis and W f The 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 UL-DL channel reciprocity in the angle domain) and / or FD (assuming UL-DL channel reciprocity 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. In Release 17, such codebooks are supported (referred to as Release 17 Further Enhanced Type II Port Selection Codebooks in Reference 8).

[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 deteriorate rapidly due to fast channel variations (which in turn is due to UE mobility that contributes to the Doppler component of the channel) and the one shot nature of CSI-RS measurements and CSI reporting in Release 15 / 16 / 17. This limits the Release 15 / 16 / 17 codebook to be useful only for low mobility or static UEs. For medium or high mobility scenarios, enhanced CSI-RS measurements and CSI reporting are needed, which are based on the Doppler component or time domain (TD) variations of the channel. As described in [Reference 9], the Doppler component of the channel remains almost unchanged for a long duration (called the channel settling time), which is significantly greater than the channel coherence time. Note that the current (Release 15 / 16 / 17) CSI reports are based on the channel coherence time, which is not suitable 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 may report the obtained Doppler component (as part of the CS report) using the codebook. Or the gNB may use the obtained Doppler component of the UL channel to beamform the CSI-RS for the UE's CSI report.

[0117] Fig.11Channel measurements 1100 with and without a Doppler component are shown according to an embodiment of the present disclosure. Fig.11 The embodiments of channel measurement 1100 with and without Doppler components 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.11 A diagram of channel measurement with and without a Doppler component is shown. When the channel is measured with 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 the channel is measured without a Doppler component (e.g., based on a one-time RS), the measured channel may be far from the actual changing channel.

[0119] As described above, in order to obtain the Doppler component of the channel, RS bursts need to be measured. Various embodiments of the present disclosure provide example embodiments for measuring RS bursts (measuring time-varying channels over a measurement window) and reporting TD channel properties (such as the Doppler component of the channel).

[0120] Various embodiments of the present disclosure provide mechanisms for acquiring time domain channel properties (TDCP) at a gNB. Specifically, various embodiments relate to reporting TDCP based on RS burst measurements. Various embodiments of the present disclosure provide mechanisms for event-triggered TDCP reporting based on TRS measurements, signaling / configuration details for TDCP reporting, and the medium (e.g., UL MAC CE) for TDCP reporting.

[0121] 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 including spatial, frequency, and time (Doppler) domain components. Various embodiments of the present disclosure provide mechanisms for CSI reference resources, CSI reporting windows, and the relationship between DD / TD basis vector lengths and CSI reference resources, CSI-RS measurement windows, and CSI reporting windows.

[0122] All the following components 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, when the scheduling unit in time is a subframe (which may include one or more time slots) or a time slot, all the following components and embodiments are applicable to UL transmission.

[0123] 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.

[0124] A 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.

[0125] A "CSI reporting band" is defined as a set / set 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 a "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 a "partial band".

[0126] The term "CSI reporting band" is used only as an example to represent the functionality. Other terms such as "CSI reporting subband set" or "CSI reporting bandwidth" or bandwidth part (BWP) may also be used.

[0127] In terms of UE configuration, the UE may be configured with at least one CSI reporting band. This configuration may be semi-static (via high-layer signaling or RRC) or dynamic (via MAC CE or L1 DL control signaling). When configured with multiple (N) CSI reporting bands (e.g., via RRC signaling), the UE may report CSI associated with n≤N CSI reporting bands. For example, >6GHz, large system bandwidths may require multiple CSI reporting bands. The value of n may be configured semi-statically (via high-layer signaling or RRC) or dynamically (via MAC CE or L1 DL control signaling). Alternatively, the UE may report a recommended value of n via the UL channel.

[0128] Therefore, the CSI parameter frequency granularity for each CSI reporting band can be defined as follows. n When there are multiple sub-bands, the CSI parameters are configured with M n A "single" report for a CSI reporting band with 4 sub-bands. n When one CSI parameter is reported for each of the subbands, the CSI parameter is configured with M n The CSI reporting frequency band for each sub-band is the “sub-band” of the frequency band.

[0129] Fig.12An example antenna port layout 1200 is shown according to an embodiment of the present disclosure. Fig.12 The embodiment of antenna port layout 1200 shown in FIG. 1 is for illustration only. Fig.12 The scope of the present disclosure is not limited to any particular implementation of the antenna port layout 1200 .

[0130] 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, 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 An example is shown, where "X" represents two antenna polarizations. In this disclosure, the term "polarization" refers to a group of antenna ports. For example, antenna ports Including the first antenna polarization, 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, ...).

[0131] As described in U.S. Patent No. 10,659,118, entitled “Method and Apparatus for Explicit CSI Reporting in Advanced Wireless Communication Systems,” issued on May 19, 2020, the entire contents of which are incorporated herein by reference, a UE is configured with high-resolution (e.g., Type II) CSI reporting, wherein a linear combination-based Type I CSI reporting framework is extended to include a frequency dimension in addition to the first and second antenna port dimensions.

[0132] Fig.13 A 3D grid 1300 of oversampled DFT beams is shown in accordance with an embodiment of the present disclosure. Fig.13 The illustrated embodiment of the 3D grid 1300 of oversampled DFT beams is for illustration only. Fig.13 The scope of the present disclosure is not limited to any particular implementation of a 3D grid of oversampled DFT beams.

[0133] 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

[0134] The first dimension is associated with the first port dimension,

[0135] The second dimension is associated with the second port dimension, and

[0136] • The third dimension is associated with the frequency dimension.

[0137] The basis sets used for representing the first port domain and the second port domain are respectively N in length. 1 and length N 2 The oversampled DFT codebooks have oversampling factors O and 1 and O 2 Similarly, the basis set for the frequency domain representation (i.e., the third dimension) is of length N 3 With oversampling factor O 3 In one example, O 1 =O 2 =O 3 =4. In one example, O 1 =O 2 =4,O 3 =1. In another example, the oversampling factor O i belongs to {2, 4, 8}. In another example, O 1 , O 2 and O 3 At least one of them is configured by a higher layer (via RRC signaling).

[0138] As explained in section 5.2.2.2.6 of reference 8, the UE is configured with the higher layer parameter CodebookType set to "typeII-PortSelection-r16" for enhanced type IICSI reporting, where the precoder for all subbands (SBs) and for a given layer l=1,..,v (where v is the associated RI value) is given by either:

[0139]

[0140] or

[0141]

[0142] in:

[0143] ·N 1 is the number of antenna ports in the first antenna port dimension (with the same antenna polarization),

[0144] ·N 2is the number of antenna ports in the second antenna port dimension (with the same antenna polarization),

[0145] ·P CSI-RS is the number of CSI-RS ports configured for the UE,

[0146] ·N 3 is the number of SBs or the number of FD units or the number of FD components (including the CSI reporting band) used for PMI reporting or the total number of precoding matrices indicated by PMI (one per FD unit / component),

[0147] ·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 YesN 1 N 2 ×1 port selection column vector, and if the antenna port at the gNB is dual-polarized or cross-polarized, then a i It is 2N 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 value 0 elsewhere,

[0148] b f YesN 3 ×1 column vector,

[0149] ·c l,i,f is a complex coefficient.

[0150] In a variant, when the UE reports a subset K < 2LM coefficients (where K is fixed, configured by the gNB or reported by the UE), the coefficient c in Equation 1 or Equation 2 of the precoder equation l,i，f Replace with x l,i，f ×c l,i，f ,in

[0151] According to some embodiments of the present disclosure, if the coefficient c l,i，f If x is reported by UE, l,i，f =1.

[0152] Otherwise (i.e., c l,i，f Not reported by UE), x l,i，f =0.

[0153] x l,i，f =1 or 0 is according to some embodiments of the present disclosure. For example, it can be via a bitmap.

[0154] In a variation, the precoder equations of Equation 1 or Equation 2 are respectively summarized as

[0155]

[0156] and

[0157]

[0158] 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 ∑M i is fixed, configured by the gNB or reported by the UE).

[0159] W l The columns of are normalized to norm 1. For rank R or R layers (υ = R), the precoding matrix is ​​given by Given. Equation 2 is assumed in the rest of the present disclosure. However, the embodiments of the present disclosure are general and also apply to Equation 1, Equation 3, and Equation 4.

[0160] here And M≤N 3 .if Then A is the identity matrix and is not reported. Similarly, if M = N 3 , then B is the identity matrix and is not reported. In an example, suppose 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 the following formula

[0161]

[0162] When O 3 = 1, the FD basis vectors of layer l∈{1, .., υ} (where υ is the RI or rank value) are given by

[0163]

[0164] in, and in,

[0165] In another example, a discrete cosine transform DCT basis is used to construct / report a third dimension basis B. The mth column of the DCT compression matrix is ​​simply given by And K = N 3 , and m=0, ..., N 3 -1.

[0166] Since DCT is applied to real-valued coefficients, DCT is applied to the real and imaginary parts (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 illustrative purposes only. The present disclosure is applicable to any other basis vectors for constructing / reporting A and B.

[0167] At a high level, the precoder W l It can be described as follows.

[0168]

[0169] Where A = W 1 Version 15W with type IICSI codebook 1 Corresponding to [Reference 8], and B = W f .

[0170] The matrix includes all the required linear combination coefficients (eg, magnitude and phase or real or imaginary). Each reported coefficient (c l,i，f =p l,i，f φ l，i，f ) is quantized into amplitude coefficients (p l,i,f ) and phase coefficient (φ l，i，f ).

[0171] The above framework (Equation 5) represents the 2L SD beams and M υ Multiple (N) FD beams using linear combination (double sum) 3 The precoding matrix of the FD unit is calculated by using the TD basis matrix W t Instead of the FD basis matrix W f , this framework can also be used to represent the precoding matrix in the time domain (TD), where W t The columns include M representing some form of delay or channel tap position. υ TD beams. Therefore, the precoder W l It can be described as follows.

[0172]

[0173] In one example, M υTD beams (indicating delay or channel tap positions) from N 3 The TD beams are selected from a set of N 3 Corresponding 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.

[0174] The present disclosure focuses on measuring CS-RS bursts, which can be used to obtain the time domain (TD) or Doppler domain (DD) components / properties of the channel. The measured channel can be used to report TDCP or DD components independently (separately) or together with other CSI components (e.g., based on space-frequency compression).

[0175] The above CSI reporting framework based on the space-frequency compression (Equation 5) or space-time compression (Equation 5A) framework can be extended to the Doppler domain (e.g., for UEs with medium to high mobility). 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 unit 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.

[0176] Fig.14 An example 1400 of a UE configured to receive non-zero power (NZP) CSI-RS resource bursts according to an embodiment of the present disclosure is shown. Fig.14 The embodiment of the example 1400 of a UE configured to receive bursts of non-zero power (NZP) CSI-RS resources shown in FIG. 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.

[0177] In one embodiment, Fig.14 As shown, the UE is configured to receive bursts of non-zero power (NZP) CSI-RS resources in B time slots including the measurement window, referred to as CSI-RS bursts for simplicity, where B≥1. The B time slots may correspond to at least one of the following examples.

[0178] • In one example, the B-time slots are uniformly / evenly spaced with an inter-slot spacing d.

[0179] In one example, the B time slots may be spaced e 1 =d 1、e 2 =d 2 -d 1 、e 3 =d 3 -d 2 ...equally non-uniformly spaced, where for at least one pair (i, j) (where i ≠ j), e i ≠e j .

[0180] The UE receives the CSI-RS burst, estimates B instances of DL channel measurement, 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 setting (e.g., via a higher layer parameter CSI-ReportConfig), where the corresponding CSI report includes information about the Doppler component of the DL channel.

[0181] Assume h t is the DL channel estimate based on the CSI-RS resources received in time slot t∈{0, 1, ..., B-1}. When the DL channel estimate in time slot t is of size N Rx ×N Tx ×N Sc The matrix G t When 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 notation vec(X) is used to represent a vectorization operation, where the matrix X is converted to a vector by concatenating the elements of the matrix in a sequence such as 1→2→3→, etc., which means that the concatenation starts from the first dimension, then moves to the second dimension, and continues until the last dimension. Assume H B =[h 0 h 1 …h B-1 ] is a cascaded DL channel. It can be based on H B Get the Doppler component of the DL channel. For example, H B It 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 a coefficient matrix whose columns include coefficient vectors, and N<B is the number of DD basis vectors. Since HB The columns of may be correlated, so DD compression can be achieved when the value of N is small (compared to the value of B). In this example, the Doppler component of the channel is represented by the DD basis matrix Φ and the coefficient matrix C.

[0182] In one embodiment, the UE is configured / activated / triggered to determine / report a CSI report, or the UE initiates (or requests) reporting of a CSI report, wherein the CSI report includes a "new quantity" of the TDCP and / or Doppler components of the channel. The CSI report may not include any other parameters (e.g., CSI parameters), i.e., it is an independent report. Or the CSI report may include at least one additional parameter (e.g., CSI parameter), i.e., it is not an independent report. When the CSI report is configured (by the NW), the configuration may be via a higher layer (RRC). Alternatively, when the CSI report is activated (by the NW), the activation command may be via a MAC CE. Alternatively, when the CSI report is triggered (by the NW), the trigger message may be via dynamic DCI signaling or a combination of MACE CE and DCI signaling.

[0183] In one example, the “new amount” corresponds to at least one of the following.

[0184] In one example, the "new quantity" or "TDCP" or "DD" is (or is based on or corresponds to) Doppler spread.

[0185] In one example, the "new quantity" or "TDCP" or "DD" is (or is based on or corresponds to) a Doppler shift.

[0186] In one example, the "new amount" or "TDCP" or "DD" is (or is based on or corresponds to) the UE speed.

[0187] In one example, the "new quantity" or "TDCP" or "DD" is (or is based on or corresponds to) a time-domain correlation.

[0188] • In one example, a linear prediction model is assumed to predict the variation of channel coefficients (amplitude / phase) over time.

[0189] In one example, the linear prediction model corresponds to c t =p 1 ×c t-1 , where c t is the predicted channel coefficient at time slot t, and p 1 is the predictor coefficient. When t = 1 (reference time), c 0are reference prediction coefficients, which may correspond to a reference (eg, a CSI reference resource) or the latest (Type II) CSI reported in an earlier slot.

[0190] In one example, the linear prediction model corresponds to c t =p 1 ×c t-1 +p 2 ×c t-2 , where c t is the predicted channel coefficient for time slot t, and p i (for i = 1, 2) is the prediction coefficient. When t = 1 (reference time), c 0 are reference prediction coefficients, which may correspond to a reference (eg, a CSI reference resource) or the latest (Type II) CSI reported in an earlier slot.

[0191] In one example, the linear prediction model corresponds to Where p is the number (length) of prediction coefficients, c t is the predicted channel coefficient at time slot t, and p i (for i = 1, 2) is the prediction coefficient. When t = 1 (reference time), c 0 are reference prediction coefficients, which may correspond to a reference (eg, a CSI reference resource) or the latest (Type II) CSI reported in an earlier slot.

[0192] In one example, time domain or DD compression is used to report time domain correlation. For example, a CSI-RS burst (e.g., based on TRS) measured within a measurement window, as described in detail in this disclosure, can be used to obtain a time domain channel measurement within the measurement window, and a framework similar to Type II (linear combination of basis vectors) includes reporting compressed time domain or DD channel components. In one example, what is reported includes a set of N basis vectors (e.g., TD or DD basis vectors) Φ = [φ 0 φ 1 …φ N-1 ] (e.g., DFT) and the corresponding coefficients {c 0 , ...c N-1}. In one example, the vector φ 0 φ 1 …φ N-1 It can be an orthogonal DFT vector of length N. In one example, each coefficient is represented by c n =a n φ n , where a n and φ nare the amplitude (or power) and phase values, respectively. In one example, the amplitude / phase of all N coefficients is reported. In one example, the amplitude / phase of N-1 coefficients is reported, and the remaining coefficient c is not reported. n* The amplitude / phase of. Coefficient c n* The amplitude / phase of can be fixed (e.g., 1). n* The index n * It can be fixed (e.g., to 1), or reported (e.g., as part of a report of the strongest / reference coefficient index), or configured to the UE (e.g., via higher layer or MAC CE or DCI).

[0193] In one example, configuration / activation / triggering and reporting of CSI reporting (including TDCP or DD components) is according to at least one of the following.

[0194] In one example, both the configuration / activation / triggering and reporting of the CSI report are NW controlled (or NW initiated). For example, the configuration of the CSI report can be via a high-level CSI-ReportConfig including reportQuantity set to "new quantity" or "TDCP" or "DD", and the report is also configured to be via UCI (as configured by the NW), and the UCI can be reported via PUCCH or PUSCH. When the CSI report is periodic, the CSI report is reported according to the configuration. When the CSI report is SP, the CSI report is reported according to the activation command (or DCI) that activates the configured CSI report. When the CSI report is AP, the CSI report is reported according to the DCI triggering status that triggers the configured CSI report.

[0195] • In one example, the CSI report may be reported on the PUCCH. If the PUCCH transmission including the CSI report overlaps with the PUSCH transmission, then the uplink control information (UCI) with the CSI report is multiplexed in the PUSCH.

[0196] In one example, the CSI report may be included in UCI transmitted on PUSCH, where the PUSCH transmission may be one of: a PUSCH transmission scheduled by a UL grant, or a PUSCH transmission with a grant of type 1 or type 2 configuration, or a Msg3 PUSCH transmission for random access procedure type 1, or a MsgA PUSCH transmission for random access procedure type 2.

[0197] In one example, the configuration / activation / triggering of CSI reporting is NW controlled (or NW initiated) and the reporting is UE initiated. For example, the configuration of CSI reporting may be via higher layers (RRC), but the reporting is event triggered (by the UE). For example, when configured, the UE may trigger or initiate the reporting of CSI reporting when an event of interest is detected. Several examples of events of interest are as follows:

[0198] In one example, the event is based on the UE speed (v). For example, when the UE speed (v) is greater than a threshold (t v ), that is, v>t v , the event is declared as “detected” or “positive” and the UE triggers a CSI report (e.g., TDCP or DD). Alternatively, when the UE speed v is equal to or greater than a threshold (t v ), that is, v ≥ t v , the event is declared as "detected" or "positive" and the UE triggers a CSI report (e.g., TDCP or DD). Threshold t v It may be fixed or configured (eg, via higher layer RRC) or reported by the UE (eg, via UE capability reporting).

[0199] In one example, the event is based on UE acceleration / deceleration (a). For example, when the UE acceleration / deceleration a is greater than a threshold (t a ), that is, a>t a , the event is declared as “detected” or “positive” and the UE triggers a CSI report (e.g., TDCP or DD). Or, when the UE acceleration / deceleration a is equal to or greater than a threshold (t a ), that is, a ≥ t a , the event is declared as "detected" or "positive" and the UE triggers a CSI report (e.g., TDCP or DD). Threshold t a It may be fixed or configured (eg, via higher layer RRC) or reported by the UE (eg, via UE capability reporting).

[0200] In one example, the event is based on the slope of the UE speed (s). For example, when the slope of the UE speed (s) is greater than a threshold (t s ), that is, s>t s , the event is declared as “detected” or “positive” and the UE triggers a CSI report (e.g., TDCP or DD). Or, when the slope of the UE speed (s) is equal to or greater than a threshold (t s ), that is, s ≥ t s , the event is declared as "detected" or "positive" and the UE triggers a CSI report (e.g., TDCP or DD). Threshold t sIt may be fixed or configured (eg, via higher layer RRC) or reported by the UE (eg, via UE capability reporting).

[0201] In one example, the event is based on Doppler spread (due to UE speed). For example, when the Doppler spread (d) is greater than a threshold (t d ), that is, d>t d , the event is declared as “detected” or “positive” and the UE triggers a CSI report (e.g., TDCP or DD). Alternatively, when the Doppler spread is equal to or greater than a threshold (t d ), that is, d ≥ t d , the event is declared as "detected" or "positive" and the UE triggers a CSI report (e.g., TDCP or DD). Threshold t d It may be fixed or configured (eg, via higher layer RRC) or reported by the UE (eg, via UE capability reporting).

[0202] In one example, the event is based on Doppler shift (due to UE speed). For example, when the Doppler shift (D) is greater than a threshold (t D ), that is, D>t D , the event is declared as “detected” or “positive” and the UE triggers a CSI report (e.g., TDCP or DD). Alternatively, when the Doppler shift is equal to or greater than a threshold (t D ), that is, D ≥ t D , the event is declared as "detected" or "positive" and the UE triggers a CSI report (e.g., TDCP or DD). Threshold t D It may be fixed or configured (eg, via higher layer RRC) or reported by the UE (eg, via UE capability reporting).

[0203] In one example, events are based on cross-correlation or temporal correlation (across multiple time instances). For example, when the correlation (ρ) is less than a threshold (t ρ ), that is, ρ<t ρ , the event is declared as “detected” or “positive” and the UE triggers a CSI report (e.g., TDCP or DD). Alternatively, when the correlation is equal to or less than a threshold (t ρ ), that is, ρ ≥ t ρ , the event is declared as "detected" or "positive" and the UE triggers a CSI report (e.g., TDCP or DD). Threshold t ρ It may be fixed or configured (eg, via higher layer RRC) or reported by the UE (eg, via UE capability reporting).

[0204] In one example, the event is based on the relative Doppler shift (due to UE speed) of multiple peaks in the channel impulse response (CIR). For example, when the relative Doppler shift (D) is greater than a threshold (t D ), that is, D>t D , the event is declared as “detected” or “positive” and the UE triggers a CSI report (e.g., TDCP or DD). Alternatively, when the relative Doppler shift is equal to or greater than a threshold (t D ), that is, D ≥ t D , the event is declared as "detected" or "positive" and the UE triggers a CSI report (e.g., TDCP or DD). Threshold t D It may be fixed or configured (eg, via higher layer RRC) or reported by the UE (eg, via UE capability reporting).

[0205] In one example, the event is based on the relative Doppler shift of different TRS resources. For example, when the relative Doppler shift (D) is greater than a threshold (t D ), that is, D>t D , the event is declared as “detected” or “positive” and the UE triggers a CSI report (e.g., TDCP or DD). Alternatively, when the relative Doppler shift is equal to or greater than a threshold (t D ), that is, D ≥ t D , the event is declared as "detected" or "positive" and the UE triggers a CSI report (e.g., TDCP or DD). Threshold t D It may be fixed or configured (eg, via higher layer RRC) or reported by the UE (eg, via UE capability reporting).

[0206] In one example, the UE is also configured with a timer (or prohibit timer), similar to the timer configured for power headroom (PHR) reporting. The configuration can be via a higher layer parameter (RRC), such as tdcp-ProhibitTimer-r18.

[0207] In one example, the UE is also configured with a higher layer IE (via RRC) I that configures UE-initiated CSI reporting (as described above), wherein the IEI includes components according to at least one of the following examples.

[0208] - In one example, the IEI includes a threshold value (as described in the examples above).

[0209] - In one example, the IEI includes a threshold (as described in the above example) and a prohibit timer.

[0210] In one example, the IEI includes a threshold (as described in the above example), an inhibit timer, a TRS resource or a set / pool / list of TRS resources, and the number of TDCP reports (N), where N>=1.

[0211] In one example, the UEI is TDCP-Report-r18. If TDCP-Report-r18 is configured and tdcp-ProhibitTimer-r18 is not running, a CSI report (including TDCP) will be triggered if an event of interest occurs (is detected), where the event is according to one of the examples herein and the threshold is configured via the RRC parameter tdcp-Threshold-r18. Two examples of TDCP-Report-r18 are provided below.

[0212]

[0213]

[0214] In one example, the medium or channel for reporting event-triggered (or UE-initiated) CSI reporting may be one of the following examples.

[0215] • In one example, CSI reporting is reported via the medium as a UL MAC-CE entity (scheduled to be reported via PUSCH carrying UL MAC).

[0216] o In one example, the UL MAC CE entity is a new "dedicated" MAC CE for CSI reporting including TDCP.

[0217] In one example, an existing UL MAC CE is used for the report. For example, the UL MAC CE for PHR reporting may be used. In this case, the IE tdcp-Threshold-r18 may be configured via the IE PHR-Config.

[0218] In one example, the CSI report may be reported via a combination of UL MAC CE and UCI. That is, a portion of the CSI report is reported via MAC-CE (scheduled to be reported via PUSCH carrying UL MAC), and the remainder of the CSI report is reported via UCI (e.g., PUCCH or PUSCH scheduled to carry UCI).

[0219] In one example, two-part CSI reporting via MAC CE is used (similar to two-part UCI reporting). The first part of the CSI report includes a fixed part (component) of the CSI report, and the second part of the CSI report includes the remaining part of the CSI report. Alternatively, whether the UE supports two-part CSI reporting via MAC CE is subject to (depends on) UE capabilities. That is, only when the UE supports two-part CSI reporting via MAC CE, the UE can be configured with such reporting; otherwise (when the UE does not support it), the UE cannot be configured with two-part CSI reporting via MAC CE, so the CSI report can only be via (part of) CSI reporting via MAC CE and / or UCI.

[0220] In one example, the reporting of the CSI report is always UE-initiated. For example, as described in the above examples, a UE-initiated or event-triggered mechanism may be used as a trigger.

[0221] • In one example, there is no configuration or signaling from the NW regarding this reporting.

[0222] In one example, the NW may (pre)configure UL resources to report UE initiated (UE requested) or messages about detected events. Based on the UE request (or message), the NW may grant UL resources and trigger CSI reporting.

[0223] In one example, the report can be explicitly "triggered" only when (after) the UE reports / initiates CSI reporting, for example, when the UE reports a message requesting resources for CSI reporting via the UL MAC CE entity. That is, the CSI request field in the DCI can trigger CSI reporting only when the NW receives a request from the UE via the UL MAC CE entity.

[0224] In one embodiment, as described herein, CSI reporting may be configured based on (or linked to) X ≥ 1 NZP CSI-RS resources (which may be included in a CSI-RS resource set). In one example, such NZP CSI-RS resources correspond to TRS resources (CSI-RS resources configured for tracking). When X>1, at least one of the following examples is used / configured for reporting.

[0225] In one example, one TDCP or DD component of a channel is reported per CSI-RS resource. Thus, there are X separate reports (one per CSI-RS resource) or X components (one per CSI-RS resource) in a (single) reported CSI report. In this case, the UE determines the number of reports / components using the corresponding CSI-RS resources.

[0226] In one example, one (joint) TDCP or DD component of a channel is reported across all CSI-RS resources (regardless of the value of X). In this case, the UE may combine / aggregate all CSI-RS measurements across all resources and then use the aggregated measurements to determine the report.

[0227] In one example, a subset of Z CSI-RS resources may be selected and the TDCP or DD component of the channel may be reported using only (for) the selected CSI-RS resources. Information about the selection (e.g., the Z value and / or the index of the selected resource) may be provided / reported by the UE (e.g., as part of the report). When Z is reported by the UE, two-part UCI is used. Or the value of Z may be fixed or configured, and information about the selection (e.g., the index of the selected resource) may be provided / reported by the UE (e.g., as part of the report). The report may be separate or one (joint) for the selected resource.

[0228] Information about the selection may be reported via an indicator. In one example, a new indicator is used (separate from an existing indicator). In one example, an existing indicator is used. For example, CRI (or PMI or PMI component) is used.

[0229] • In one example, one (single) joint indicator (new indicator, or CRI, or PMI, or PMI component) is used to indicate the Z selected CSI-RS resources.

[0230] • In one example, multiple separate indicators are used, ie, one indicator (new indicator, or CRI, or PMI, or PMI component) is used to indicate each of the Z selected CSI-RS resources.

[0231] In one embodiment, for TDCP or Doppler component reporting (or CSI reporting including TDCP or Doppler components), the UE is configured to receive NZP CSI-RS resources (also called TRS resources) for tracking via a higher-level TDCP-ReportConfig-r18 (TDCP-ReportConfig-r18) or CSI reporting settings (e.g., via a higher-level CSI-ReportConfig).

[0232] TDCP-ReportConfig-r18 includes the NZP CSI-RS resource set for tracking.

[0233] In one example, TDCP-ReportConfig-r18 contains (reference) IDs of S≥1 NZP CSI-RS resource sets, and each NZP CSI-RS resource set is configured via a higher layer NZP-CSI-RS-ResourceSet configured with a higher layer parameter trs-Info.

[0234] In one example, TDCP-ReportConfig-r18 contains the (reference) IDs of N≥1 NZP CSI-RS resources, and each NZP CSI-RS resource is a TRS resource, ie, the configured higher layer parameter trs-Info.

[0235] The CSI reporting setting is linked to the CSI resource setting (e.g., via the higher layer CSI-ResourceConfig), and includes a higher layer parameter reportQuantity set to other than "none", where the CSI resource setting includes the NZP CSI-RS resource sets for tracking. That is, the CSI-resource setting contains the (reference) IDs of S≥1 NZP CSI-RS resource sets, and each NZP CSI-RS resource set is configured via the higher layer NZP-CSI-RS-ResourceSet configured with the higher layer parameter trs-Info.

[0236] When the medium for CSI reporting is UL MAC CE, the time domain reporting behavior of CSI-ReportConfig is indicated by the higher layer parameter reportConfigType and can be set to "tdcpReporting-r18" or "tdcpReportingOn_MACCE-r18" for CSI reporting via UL MAC CE (see TS 38.321), as described above.

[0237] Each NZP-CSI-RS-ResourceSet includes:

[0238] Four periods of NZP CSI-RS resources in two consecutive slots, with two periods of NZP CSI-RS resources in each slot, or

[0239] Two periods of NZP CSI-RS resources in one slot.

[0240] In the following of this disclosure, such NZP CSI-RS resources are referred to as Tracking RS (TRS).

[0241] In addition, NZP-CSI-RS-ResourceSet can configure CSI-RS resources as:

[0242] · Periodic, where the CSI-RS resources in the NZP-CSI-RS-ResourceSet are configured with the same periodicity, bandwidth, and subcarrier position.

[0243] · Periodic CSI-RS resources in one set and aperiodic CSI-RS resources in a second set, wherein the aperiodic CSI-RS and periodic CSI-RS resources have the same bandwidth (have the same RB location), and the aperiodic CSI-RS are configured with qcl-Type set to “typeA” and “typeD”, with periodic CSI-RS resources where applicable.

[0244] Each CSI-RS resource is configured by a higher layer parameter NZP-CSI-RS-Resource with some restrictions. For example, each resource is a single port CSI-RS resource with density p=3.

[0245] The remaining details about the NZP CSI-RS resources (TRS) used for tracking may be as described in Section 5.1.6.1.1 of [Ref 8].

[0246] When TRS is configured for CSI (or TDCP or Doppler component) reporting and reportQuantity is set to other than 'none', the value of S may be according to at least one of the following examples.

[0247] In one example, when TRS is configured for CSI reporting and reportQuantity is set to other than "none", the value of S is fixed (eg, S=1).

[0248] In one example, the value of S may be 1 or greater than 1 (eg, S=2) based on configuration, and the value S>1 may be subject to UE capability reporting (ie, it may be configured only if the UE supports it).

[0249] Furthermore, when a TRS is configured for CSI (or TDCP or Doppler component) reporting, and reportQuantity is set to other than "None", there may be at least one restriction on such TRS. Several examples of restrictions are as follows.

[0250] • In one example, the TRS may be only the periodic NZP CSI-RS resource.

[0251] In one example, the periodicity and slot offset for the periodic NZP CSI-RS resource given by the higher layer parameter periodicityAndOffset of the NZP-CSI-RS-Resource configuration is 2 μ X p time slots, where X p is fixed (e.g., 10), and where μ is defined in Section 4.3 of [Ref 10].

[0252] Note that when TRS is a periodic NZP CSI-RS resource, it can be used / configured to measure CSI-RS bursts for TDCP or Doppler component reporting. This can be achieved by associating a measurement window (including B>1 time slots) according to the TRS measurement instance / opportunity with the report. In one example, the measurement window is defined / configured based on the CSI reference resource (see 5.2.2.5 of reference 8). In one example, the measurement window can be fixed, or configured, or reported by the UE. In one example, the measurement window can be based on the starting (first or reference) time slot (T 0 ) and the number of time slots B (starting from the first slot) to identify the measurement window.

[0253] In one example, T 0 and B are both fixed.

[0254] In one example, T 0 and B are both configured.

[0255] In one example, T 0 Both A and B are reported by the UE.

[0256] In one example, T 0 A is fixed and B is configured.

[0257] In one example, T 0 is fixed and B is reported.

[0258] In one example, T 0 A is configurable and B is fixed.

[0259] In one example, T 0 A is configured and B is reported.

[0260] In one example, T 0 A is reported and B is configured.

[0261] ●In one example, T 0 is reported and T 0 is fixed.

[0262] When configured, the measurement window is configured via RRC (e.g., as a parameter in CSI-ReportConfig). Or it is indicated via MAC CE or DCI. When reported, the measurement window is reported via CSI (e.g., as a CSI parameter).

[0263] When TRS is configured for CSI (or TDCP or Doppler component) reporting and reportQuantity is set to other than "None", the higher layer parameter timeRestrictionForChannelMeasurements (time restriction for channel measurements) in CSI-ReportConfig can be determined / configured according to at least one of the following examples.

[0264] In one example, timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "notConfigured". The UE expects to be configured with timeRestrictionForChannelMeasurements="notConfigured". Or the UE does not expect to be configured with timeRestrictionForChannelMeasurements="configured".

[0265] • In one example, timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "Configured". The UE expects to be configured with timeRestrictionForChannelMeasurements="Configured". Or the UE does not expect to be configured with timeRestrictionForChannelMeasurements="Unconfigured".

[0266] If the higher-layer parameter timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "unconfigured", the UE shall derive channel measurements for CSI (or TDCP or Doppler component) reporting in uplink time slot n only based on the NZP CSI-RS (defined in reference 10) associated with the CSI resource setting that is no later than the CSI reference resource.

[0267] If the higher-layer parameter timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "Configured", the UE shall derive channel measurements for CSI (or TDCP or Doppler component) reports in uplink time slot n only based on the timing of the most recent NZP CSI-RS associated with the CSI resource setting (defined in reference 10) that is no later than the CSI reference resource.

[0268] Depending on the value of reportQuantity (eg, when CQI is included in the CSI report), at least one interference measurement resource (IMR) may also be configured via CSI-ReportConfig. The IMR may be a NZP CSI-RS or CSI-IM resource configured for interference measurement.

[0269] Examples of reportQuanity set to other than "None" are provided later in this disclosure.

[0270] The content of a CSI report configured via reportQuantity set to other than "None" as described above (including a TDCP or Doppler component report) is configured according to at least one of the following embodiments.

[0271] In one embodiment, a reportQuantity set to other than "none" corresponds to a single report.

[0272] In one example, reportQuantity = "new quantity" or "TDCP" or "DD", where the new quantity is according to (corresponds to) at least one example herein.

[0273] In one example, reportQuantity=existing indicator "1", which indicates one of TDCP or Doppler component as described in one or more examples herein.

[0274] • In one example, "I" = "PMI" or "PMI component".

[0275] • In one example, "I" = "CRI".

[0276] The temporal behavior of such reporting may be configured according to at least one of the following examples.

[0277] • In one example, the TD behavior is fixed to be periodic (P).

[0278] • In one example, the TD behavior is fixed as semi-persistent on PUCCH (SPonPUCCH).

[0279] • In one example, the TD behavior is fixed as semi-persistent on PUSCH (SPonPUSCH).

[0280] • In one example, the TD behavior is fixed to be aperiodic (AP).

[0281] • In one example, the TD behavior is configured according to {P, SPonPUCCH}.

[0282] • In one example, the TD behavior is configured according to {P, SPonPUSCH}.

[0283] • In one example, TD behavior is configured according to {P, AP}.

[0284] • In one example, the TD behavior is configured according to {AP, SPonPUCCH}.

[0285] • In one example, the TD behavior is configured according to {AP, SPonPUSCH}.

[0286] • In one example, the TD behavior is configured according to {SPonPUCCH, SPonPUCCH}.

[0287] • In one example, the TD behavior is configured according to {P, SPonPUCCH, SPonPUCCH}.

[0288] • In one example, TD behavior is configured according to {AP, SPonPUCCH, SPonPUCCH}.

[0289] • In one example, the TD behavior is configured according to {P, AP, SPonPUCCH}.

[0290] • In one example, the TD behavior is configured according to {P, AP, SPonPUSCH}.

[0291] • In one example, the TD behavior is configured according to {P, SPonPUCCH, SPonPUCCH, SP}.

[0292] When configured, the TD behavior of CSI-ReportConfig is indicated by the higher layer parameter reportConfigType.

[0293] In one embodiment, reportQuantity set to other than "None" corresponds to a joint report, where the joint report includes (A) the TDCP or Doppler component of the channel, and (B) other CSI parameters according to {CRI, LI, PMI, CQI, RI}.

[0294] Regarding reportQuantity, at least one of the following examples is used / configured.

[0295] In one example, reportQuantity is set to "cri-RI-LI-PMI-CQI-X", where cri-RI-LI-PMI-CQI corresponds to (B) and X corresponds to "new quantity" or "TDCP" or "DD" of (A).

[0296] In one example, reportQuantity is set to "RI-LI-PMI-CQI-X", where RI-LI-PMI-CQI corresponds to (B) and X corresponds to "new quantity" or "TDCP" or "DD" of (A).

[0297] In one example, reportQuantity is set to "cri-RI-PMI-CQI-X", where cri-RI-PMI-CQI corresponds to (B) and X corresponds to "new quantity" or "TDCP" or "DD" of (A).

[0298] In one example, reportQuantity is set to "RI-PMI-CQI-X", where RI-PMI-CQI corresponds to (B) and X corresponds to "new quantity" or "TDCP" or "DD" of (A).

[0299] • In one example, reportQuantity is set to "cri-RI-CQI-X", where cri-RI-CQI corresponds to (B) and X corresponds to "new quantity" or "TDCP" or "DD" of (A).

[0300] - In one example, reportQuantity is set to "RI-CQI-X", where RI-CQI corresponds to (B) and X corresponds to "new quantity" or "TDCP" or "DD" of (A).

[0301] • In one example, reportQuantity is set to "cri-CQI-X", where cri-CQI corresponds to (B) and X corresponds to "new quantity" or "TDCP" or "DD" for (A).

[0302] - In one example, reportQuantity is set to "CQI-X", where CQI corresponds to (B) and X corresponds to "new quantity" or "TDCP" or "DD" for (A).

[0303] In one example, reportQuantity is set to "cri-RI-LI-PMI-CQI", where (A) is reported jointly with one of the indicators of {CRI, LI, RI, PMI, CQI} according to (B).

[0304] o For example, PMI={X,Y}, where X corresponds to the “new amount” or “TDCP” or “DD” of (A), and Y corresponds to the PMI component.

[0305] • In one example, reportQuantity is set to "RI-LI-PMI-CQI", where (A) is reported jointly with one of the indicators of {LI, RI, PMI, CQI} according to (B).

[0306] o For example, PMI={X,Y}, where X corresponds to the "new amount" or "TDCP" or "DD" of (A), and Y corresponds to the PMI component.

[0307] • In one example, reportQuantity is set to "cri-RI-PMI-CQI", where (A) is reported jointly with one of the indicators of {CRI, RI, PMI, CQI} according to (B).

[0308] o For example, PMI={X,Y}, where X corresponds to the new quantity "TDCP" or "DD" of (A), and Y corresponds to the PMI component.

[0309] • In one example, reportQuantity is set to "RI-PMI-CQI", where (A) is reported jointly with one of the indicators of {RI, PMI, CQI} according to (B).

[0310] o For example, PMI={X,Y}, where X corresponds to the "new amount" or "TDCP" or "DD" of (A), and Y corresponds to the PMI component.

[0311] • In one example, reportQuantity is set to "cri-ri-CQI", where (A) is reported jointly with one of the indicators of {CRI, RI, CQI} according to (B).

[0312] o For example, RI={X,Y}, where X corresponds to the "new amount" or "TDCP" or "DD" of (A), and Y corresponds to the RI component.

[0313] • In one example, reportQuantity is set to "RI-CQI", where (A) is reported jointly with one of the indicators of {RI, CQI} according to (B).

[0314] o For example, RI={X,Y}, where X corresponds to the "new amount" or "TDCP" or "DD" of (A), and Y corresponds to the RI component.

[0315] • In one example, reportQuantity is set to "cri-CQI", where (A) is reported jointly with one of the indicators of {CRI, CQI} according to (B).

[0316] o For example, CQI={X,Y}, where X corresponds to the "new amount" or "TDCP" or "DD" of (A), and Y corresponds to the CQI component.

[0317] • In one example, reportQuantity is set to "CQI", where the CQI of (A) and (B) are reported jointly.

[0318] o For example, CQI={X,Y}, where X corresponds to the "new amount" or "TDCP" or "DD" of (A), and Y corresponds to the CQI component.

[0319] CQI reporting can help / assist NW implementations such as scaling for MU precoding. In addition, CQI reporting can provide accurate interference information to NW.

[0320] Regarding NZP CSI-RS resources and / or resource sets, at least one of the following examples is used / configured.

[0321] In one example, the NZP CSI-RS resource is configured to be common to both (A) and (B). That is, CSI-ResourceConfig includes a CSI-RS resource set commonly used by both (A) and (B). In one example, the number of resource sets is fixed to 1.

[0322] In one example, two types of resource sets are linked to (configured within) a CSI report.

[0323] SetType1: CSI-RS resource set configured with trs-Info, i.e., a set including TRS

[0324] SetType2: A CSI-RS resource set not configured with trs-Info, that is, a set including NZP CSI-RS resources for normal CSI.

[0325] The set with SetType1 is configured for reporting of (A), and the set with SetType2 is configured for reporting of (B).

[0326] Assume S1 is the number of sets with SetType1, and S2 is the number of sets with SetType2.

[0327] In one example, (S1, S2) is fixed, such as (1, 1) or (2, 1).

[0328] In one example, (S1, S2) = (z, 1), and the value of z depends on the configuration. In one example, z can take values ​​according to {1, 2}.

[0329] • In one example, (S1, S2) depends on the configuration.

[0330] Assume that R1 is the number of resources in each of the S1 sets with SetType1, and R2 is the number of resources in each of the S2 sets with SetType2.

[0331] In one example, (R1, R2) is fixed, for example, (4, 1) or (2, 1).

[0332] In one example, based on the condition, (R1, R2) = (2, 1) or (4, 1).

[0333] In one example, the condition is based on the FR type. For example, for FR2, (R1, R2) = (2, 1), and for FR1, (R1, R2) = (4, 1). For example, for FR2, (R1, R2) = (2, 1), and for FR1, (R1, R2) = (2, 1) or (4, 1).

[0334] In one example, (R1, R2) = (2, b) or (4, b), where b > 1. For example, b = 2.

[0335] In one example, (R1, R2) = (2, b) or (4, b), where b>= 1. For example, b takes values ​​according to {1, 2}.

[0336] In one example, the CSI-RS resource set in the CSI report is divided into two resource subsets / groups.

[0337] Group 1: CSI-RS resources configured with trs-Info, i.e., resources including TRS

[0338] • Group 2: CSI-RS resources not configured with trs-Info, ie, resources including NZP CSI-RS resources for normal CSI.

[0339] Resources in group 1 are configured for reporting of (A), and resources in group 2 are configured for reporting of (B).

[0340] Assume that W1 is the number of resources in group 1, and W2 is the number of resources in group 2.

[0341] ●In one example, (W1, W2) is fixed, for example, (4, 1) or (2, 1).

[0342] In one example, based on the condition, (W1, W2) = (2, 1) or (4, 1).

[0343] In one example, the condition is based on the FR type. For example, for FR2, (W1, W2) = (2, 1), and for FR1, (W1, W2) = (4, 1). Or, for example, for FR2, (W1, W2) = (2, 1), and for FR1, (W1, W2) = (2, 1) or (4, 1).

[0344] In one example, (W1, W2) = (2, b) or (4, b), where b > 1. For example, b = 2.

[0345] In one example, (W1, W2) = (2, b) or (4, b), where b>= 1. For example, b takes values ​​according to {1, 2}.

[0346] The temporal behavior of such reporting may be configured according to at least one of the following examples.

[0347] • In one example, the TD behavior is fixed to be periodic (P).

[0348] • In one example, the TD behavior is fixed as semi-persistent on PUCCH (SPonPUCCH).

[0349] • In one example, the TD behavior is fixed as semi-persistent on PUSCH (SPonPUSCH).

[0350] • In one example, the TD behavior is fixed to be aperiodic (AP).

[0351] • In one example, the TD behavior is configured according to {P, SPonPUCCH}.

[0352] • In one example, the TD behavior is configured according to {P, SPonPUSCH}.

[0353] • In one example, TD behavior is configured according to {P, AP}.

[0354] • In one example, the TD behavior is configured according to {AP, SPonPUCCH}.

[0355] • In one example, the TD behavior is configured according to {AP, SPonPUSCH}.

[0356] • In one example, the TD behavior is configured according to {SPonPUCCH, SPonPUCCH}.

[0357] • In one example, the TD behavior is configured according to {P, SPonPUCCH, SPonPUCCH}.

[0358] • In one example, TD behavior is configured according to {AP, SPonPUCCH, SPonPUCCH}.

[0359] • In one example, the TD behavior is configured according to {P, AP, SPonPUCCH}.

[0360] • In one example, the TD behavior is configured according to {P, AP, SPonPUSCH}.

[0361] • In one example, the TD behavior is configured according to {P, SPonPUCCH, SPonPUCCH, SP}.

[0362] Fig.15 It is shown that a UE moves on a linear trajectory in a distributed MIMO (D-MIMO) system according to an embodiment of the present disclosure 1500 . Fig.15 The embodiment of a UE moving on a linear trajectory 1500 in a distributed MIMO (D-MIMO) system shown in FIG. 1 is for illustration only. Fig.15 The scope of the present disclosure is not limited to any particular implementation of UE movement 1500 on a linear trajectory in a distributed MIMO (D-MIMO) system.

[0363] The above embodiments regarding TDCP or Doppler component reporting can be extended to the case of multiple RRH / TRPs or distributed MIMO systems, where CSI-RS resources are transmitted from multiple locations (RRH / TRPs) within a cell. Fig.15A diagram showing a UE moving on a trajectory located in such a system is shown. When the UE moves from position A to another position B at a high speed (e.g., 60 km / h), the UE measures the channel and interference (e.g., via NZP CSI-RS resources and CSI-IM resources, respectively), using them to determine / report CSI that takes into account joint transmissions from multiple RRHs. The reported CSI may be based on a codebook that includes components that take into account both multiple RRHs and time / Doppler domain channel compression. The RRH / TRP may be associated with (or correspond to) a group / subset of NZP CSI-RS resources or ports within a resource.

[0364] In one embodiment, the UE is configured to measure RRH >1) TRS resources sent by TRP / RRH and used to report TDCP or Doppler components of the measurement channels from multiple RRH / TRPs.

[0365] In one example, configuring NZP CSI-RS or TRS resources with trs-Info for such reporting is according to at least one of the following examples.

[0366] In one example, the number of NZP CSI-RS resources (M) in a CSI-RS resource set is N RRH , that is, one resource for each TRP / RRH.

[0367] In one example, the number of NZP CSI-RS resources (M) in a CSI-RS resource set is ≥ N RRH , at least one per TRP / RRH. M resources can be divided into N RRH The plurality of subsets are each composed of at least one resource for the RRH.

[0368] In one example, the number (S) of NZP CSI-RS resource sets configured via CSI-ResourceConfig is N RRH , one set for each TRP / RRH.

[0369] In one example, the number of NZP CSI-RS resource sets (S) configured via CSI-ResourceConfig is ≥ N RRH , each TRP / RRH has at least one set. The S resource sets can be divided into N RRH The plurality of subsets are each composed of at least one resource set for an RRH.

[0370] In one example, the TDCP or Doppler component reporting is according to at least one of the following examples.

[0371] In one example, for N RRH Each of the TRP / RRHs, TDCP or Doppler component reports are separate. So, there are a total of N RRH reports. The indicator for the report may be a joint indicator. Or a separate indicator for each TRP report. For all reports with reportQuantity that can be set to a value other than "none", only one CSI-ReportConfig may be configured, as described above for details. Or there may be multiple CSI-ReportConfigs for these reports (e.g., one for each report). It is expected that the TD behavior for these multiple reports is configured the same.

[0372] In one example, for all N RRH For each TRP / RRH, TDCP or Doppler component report is joint. Therefore, there is only one report for all TRPs combined.

[0373] In one example, TDCP or Doppler component reporting is only used for N RRH The index of one TRP / RRH is fixed (e.g., 1), or configured (e.g., RRC, MAC CE, or DCI), or reported by the UE (e.g., as part of a CSI report).

[0374] In one example, the TDCP or Doppler component report includes N RRH A subset of Z TRPs outside of the TRPs / RRHs. The value Z and / or the index of the Z TRPs can be fixed (e.g., 1), or configured (e.g., RRC, MAC CE, or DCI), or reported by the UE (e.g., as part of a CSI report). The details may be based on one or more embodiments of the present invention. When Z>1, the reporting of the Z TRPs can be separate or joint.

[0375] Fig.16 FIG. 1 shows a method configured to determine N based on a value B in a CSI-RS burst according to an embodiment of the present disclosure. 4 Example 1600 of a UE. Fig.16 is configured to determine N based on the value B in the CSI-RS burst 4 The example 1600 embodiment of the UE with a value of is for illustration only. Fig.16 The scope of the present disclosure is not limited to a device configured to determine N based on a value B in a CSI-RS burst. 4 The value of any particular implementation of example 1600 of UE.

[0376] Assume N 4 is the basis vector {φ s}, for example, each basis vector is of length N 4 ×1 column vector.

[0377] 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. In one example, N4 is fixed (e.g., N 4 = B) or 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 components used for DD compression correspond to ST units. Three examples of ST units are shown in Fig.16 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.

[0378] 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 MAC CE or DCI-based signaling) or reported by the UE (e.g., as part of a CSI report). ST The value of (fixed or indicated or reported) may be subject to UE capability reporting. ST The value of can also depend on the value of B (e.g., one value for a range of values ​​of B and another value for another range of values ​​of B).

[0379] Fig.17 An example 1700 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.17 The embodiment of the example 1700 of a UE configured to divide resource blocks (RBs) into sub-bands and divide a time instance into sub-times shown in FIGURE 17 is for illustration only. Fig.17 The scope of the present disclosure is not limited to any particular implementation of example 1700 of a UE configured to divide resource blocks (RBs) into sub-bands and divide a time instance into sub-times.

[0380] In one embodiment, the UE is configured with ≥1 CSI-RS bursts (as previously shown in this disclosure) occupying a frequency band and a time span (duration), where the frequency band includes A RBs and the time span includes B time instances (of CSI-RS resources). When J>1, the A RBs and / or B time instances can be aggregated across CSI-RS bursts. In one example, the frequency band is equal to the CSI reporting band, and the time span is equal to the number of CSI-RS resource instances (across CSI-RS bursts), both of which can be configured to the UE for CSI reporting, which can be based on DD compression.

[0381] The UE is further configured to divide (split) the A RBs into subbands (SBs) and / or divide (split) the B time instances into subtimes (STs). The division of the A RBs may be based on the SB size value N SB , which can be configured to the UE (see Table 5.2.1.4-2 of Reference 8). As described in the present disclosure, the partitioning of B time instances can be based on the ST size value N ST Or r value (see Example B). Fig.17 An example is shown, where RB0, RB1, ..., RBA-1 include A RBs, T 0 , T 1 , ..., T B-1 Includes B time instances, SB size N SB =4, and ST size N ST =2.

[0382] 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 vector has a length of N 4 ×1. Here, N can be fixed or configured (e.g., via RRC, or MAC CE or DCI). Similarly, B can be fixed or configured (e.g., via RRC or 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 (P) CSI-RS resources configured as the period of the CSI-RS burst.

[0383] 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 )The precoding matrix for the future time slot or DD unit.

[0384] In one example, the gNB / NW determines / constructs the basis vector {b s}, each basis vector has a length of Q×1, where Q>N 4 In one example, Q = N 4 ×g, where g is the scaling, for example, g=2.

[0385] 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 Sure.

[0386] In one example, φ s The entries can be repeated g times, for example, (when g = 2), and vector b s It can be length Q = gN 4 The closest DFT vector to , where the closest DFT vector can be determined based on a metric such as the maximum inner product value, that is,

[0387] In one example, b s =[φ s , ...φ s ](Repeat g times).

[0388] In one example, when g = Q / N 4 If b is an integer, s is the DFT vector with index sg-1.

[0389] In this example, the remaining components of the codebook are the same as those reported.

[0390] 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 Q precoders as or Where W d，pred is a DD basis vector consisting of N predictions {b s}'s predicted DD basis matrix.

[0391] 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. Assume W 2,pred is the predicted W 2 Then, the gNB / NW determines / constructs the Q precoders as W 1 W 2,pred .

[0392] In one example, the gNB / NW determines / builds the precoder or and use it to determine / predict for (C = QN 4 )The precoding matrix for the future time slot or DD unit.

[0393] In one embodiment, N 4 The value depends on B and C (or on B, C and N ST ),in:

[0394] B = the number of CSI-RS measurement instances (time slots) including a CSI-RS burst configured for a CSI report including a DD component,

[0395] C = number of additional time instances or future time slots or prediction windows, and

[0396] ·N ST is the TD / DD unit size as described above.

[0397] In one example, N 4 =T=B+C. In one example, N 4 =T×R ST , where R ST ≥1(or R ST <1).

[0398] In one example, In one example, N 4 =T 1 ×R ST , where R ST ≥1(or R ST <1).

[0399] In one example, In one example, N 4 =T 2 ×R ST , where R ST ≥1(or RST <1).

[0400] In one example, In one example, N 4 =T 1 ×R ST , where R ST ≥1(or R ST <1).

[0401] In one example, or In one example, N 4 =T 2 ×R ST , where R ST ≥1(or R ST <1).

[0402] In one example, In one example, N 4 =T 1 ×R ST , where R ST ≥1(or R ST <1).

[0403] In one example, or In one example, N 4 =T 2 ×R ST , where R ST ≥1(or R ST <1).

[0404] 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).

[0405] DD basis matrix W d Including DD basis vectors {φ s}, each with a length of N 4 ×1.

[0406] In one example, the UE may not perform or need not perform any prediction (for C future time slots). The UE may use the DL channel (H) measured during B time slots as the basis for the prediction. meas The DD basis vector {φ ) is determined by ) (measured via the CSI-RS burst configured for CSI reporting) and a portion (or a subset of entries) of the DD basis vectors corresponding to the B CSI-RS measurements. s}. Assume φ s =[φs，meas ,φ s，pred ] is a DD basis vector, and its part φ s，meas Corresponding to B CSI-RS measurements, 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, the DD basis vector {φ s} can be determined based on a metric, for example, maximum power or absolute value or maximum norm value or

[0407] 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 meas ) and predicted (H pred ) channels to determine the DD basis vectors. In this case, the DD basis vector φ s Can be based on H agg =[H meas , H pred ] to determine. For example, the DD basis vector {φ s} can be determined based on a metric, e.g., maximum power or absolute value or maximum norm value or

[0408] 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 Then use x to predict the channel as H pred =x H ×F 2 .

[0409] The values ​​of B and C may be determined according to at least one of the following examples.

[0410] • In one example, both B and C are fixed.

[0411] In one example, one of B and C is configured (e.g., via RRC, or MAC CE or DCI), and the other is fixed or determined based on a configured value. For example, B may be configured, and C may be fixed (e.g., C=10) or determined based on B (e.g., C=B or C=t×B, and t may be fixed, e.g., 2).

[0412] • In one example, both B and C are configured via two separate parameters or via a joint parameter (eg, via RRC or MAC CE or DCI).

[0413] • In one example, one of B and C is configured (eg, via RRC or 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.

[0414] When both B and C are provided (configured) to the UE, then at least one of the following examples is used.

[0415] • In one example, both are configured via the same medium (such as RRC, MAC CE or DCI).

[0416] • In one example, one of B and C is configured via RRC and the other is configured via MAC CE or DCI.

[0417] • In one example, one of B and C is configured via MAC CE and the other is configured via DCI.

[0418] When B and / or C are configured via RRC, then the configuration may be included in or as part of a higher layer CSI-ResourceConfig or a higher layer CSI-ReportConfig.

[0419] When B and / or C are configured via MAC CE, the configuration may be included in or as part of the CSI triggering state that may be activated / deactivated via MAC CE.

[0420] When B and / or C are configured via DCI, then the configuration may be included in or be part of the CSI triggering state that may be triggered by the DCI.

[0421] In one example, one or both of B and N4 are configured, and based on B and N 4 To determine C, for example, C = N 4 -B. B and N 4 The value of can be determined according to at least one of the following examples.

[0422] In one example, B and N4 Both are fixed.

[0423] In one example, B and N 4 One of them is configured (e.g., via RRC, or MAC CE or DCI), and the other is fixed or determined based on the configured value. For example, B can be configured and N 4 It 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).

[0424] In one example, B and N are configured via two separate parameters or via a joint parameter 4 Both (eg, via RRC or MAC CE or DCI).

[0425] In one example, B and N 4 One of them is configured (e.g., via RRC or MAC CE or DCI), and the other is reported by the UE (e.g., via UE capability report). For example, B may be configured, and N 4 Can be reported.

[0426] When B and N 4 When both are provided (configured) to the UE, at least one of the following examples is used.

[0427] • In one example, both are configured via the same medium (such as RRC, MAC CE or DCI).

[0428] In one example, B and N 4 One is configured via RRC and the other is configured via MAC CE or DCI.

[0429] In one example, B and N 4 One is configured via MAC CE and the other is configured via DCI.

[0430] When B and / or N are configured via RRC 4 , then the configuration may be included in or as part of a higher-level CSI-ResourceConfig or a higher-level CSI-ReportConfig.

[0431] When B and / or N are configured via MAC CE 4 , then the configuration may be included in or as part of the CSI triggered state which may be activated / deactivated via the MAC CE.

[0432] When B and / or N are configured via DCI 4, then the configuration may be included in or as part of a CSI triggering state that may be triggered by a DCI.

[0433] The UE is configured to determine / report a CSI report including a PMI, wherein the PMI indicates an SD basis vector, an FD basis vector, a DD basis vector, and coefficients associated with a triplet (SD, FD, DD) basis vector. The coefficient reporting may be similar to the Release 16 Type II codebook, i.e., an indication of non-zero coefficients (e.g., via a bitmap), an SCI, a reference amplitude, a phase and amplitude of an NZ coefficient.

[0434] The CSI report may also include a CQI, wherein the CQI report may be configured according to at least one of the following examples.

[0435] In one example, both the measurement window or time instance (B) and the prediction or future time instance (C) are used (ie, T B+C ) to report CQI.

[0436] In one example, only the measurement window or time instance (B) (ie, T B ) to report CQI.

[0437] In one example, only the predicted or future time instance (C) is used to report the CQI, i.e., T C .

[0438] The number of CQIs reported in TD / DD may be configured according to at least one of the following examples.

[0439] In one example, the entire T x The TD / DD unit reports only one CQI, where x belongs to {B, C, B+C}.

[0440] When the cross-SB CQI report is WB, then for the CSI reporting band (cross-SB) and time window T x Both, only one CQI is reported.

[0441] When the cross-SB CQI reporting is per-SB, one CQI is reported for each SB, and the reported value is for the time window T x Remain unchanged.

[0442] 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).

[0443] When the CQI report across SBs is WB, then the multiple CQIs remain the same for all SBs.

[0444] When the CQI report across SBs is for each SB, multiple CQIs are reported for each SB.

[0445] The CSI reference resource of the serving cell is defined as follows:

[0446] - In the frequency domain, the CSI reference resources are defined by the group of downlink physical resource blocks corresponding to the frequency band to which the derived CSI is related.

[0447] - 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 [6 TS38.213], where is K with a value of 0 in frequency range 1 offset subcarrier spacing configuration.

[0448] -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 of the cell transmitting uplink and downlink, as defined in clause 4.5 of [4, TS 38.211]

[0449] - For periodic and semi-persistent CSI reporting

[0450] - 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

[0451] - 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.

[0452] -For aperiodic CSI reporting, if the DCI indicates that the UE reports CSI in the same timeslot as the CSI request, then nCSI_ref causes the reference resource to be in the same valid downlink timeslot as the corresponding CSI request, otherwise nCSI_ref is greater than or equal to The minimum value of , such that time slot nCSI ref corresponds to a valid downlink time slot, where Z′ corresponds to the delay requirement defined in clause 5.4.

[0453] -When periodic or semi-persistent CSI-RS / CSI-IM or SSB is used for channel / interference measurement, the UE is not expected to measure the channel / interference on the CSI-RS / CSI-IM / SSB whose last OFDM symbol is received up to Z′ symbols before the transmission time of the first OFDM symbol of the non-periodic CSI report.

[0454] A timeslot in a serving cell will be considered as a valid downlink timeslot if:

[0455] - it includes at least one downlink or flexible symbol configured by a higher layer, and

[0456] - It does not fall within the measurement gap configured for this UE

[0457] If there is no valid downlink time slot for CSI reference resources corresponding to the CSI reporting configuration in the serving cell, then in the uplink time slot n′, CSI reporting is omitted for the serving cell.

[0458] 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 on the CSI reference resource no later than, otherwise, the report is discarded.

[0459] When DRX is configured, the UE reports the CSI report only if the CSI reference resource receives at least one CSI-RS transmission opportunity for channel measurement and CSI-RS and / or CSI-IM opportunities for interference measurement in the DRX active time no later than the CSI reference resource, otherwise the report is discarded. As described in Section 5.2.1.4.1, 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, the UE reports the CSI report only if the CSI reference resource receives at least one CSI-RS transmission opportunity for each CSI-RS resource in the resource pair no later than the CSI reference resource receives at least one CSI-RS transmission opportunity for each CSI-RS resource in the resource pair in the same DRX active time, otherwise the report is discarded. When the UE is configured to monitor DCI format 26, and if the UE is configured by the higher layer parameter ps-TransmitOtherPeriodicCSI to report CSI when drx-onDurationTimer is not started, where the higher layer parameter reportConfigType is set to "periodic" and reportQuantity is set to one of the values ​​other than "cri-RSRP", "ssb-Index-RSRP", "cri-RSRP-Capability[Set]Index" and "ssb-Index-RSRP-C apability[Set]Index", if at least one CSI-RS transmission opportunity for channel measurement and CSI-RS and / or CSI-IM opportunity for interference measurement is received during the duration indicated by drx-onDurationTimer in DRX-Config no later than the CSI reference resource is in DRX active time or outside DRX active time, the UE shall report CSI according to the procedure described in clause 5.2.1.4 during the duration indicated by drx-onDurationTimer in DRX-Config also outside active time, 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 when drx-onDurationTimer is not started by 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", during DRX- Config during 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, and if at least one CSI-RS transmission opportunity for channel measurement is received no later than the CSI reference resource is in DRX active time or during the duration indicated by drx-onDurationTimer in DRX-Config outside the DRX active time, the UE shall report L1-RSRP when reportQuantity is set to "cri-RSRP" or "cri-RSRP-Capability[Set]Index", otherwise discard the report.

[0460] When deriving CSI feedback, the UE is not expected to have NZP CSI-RS resources used for channel measurement overlap with CSI-IM resources used for interference measurement or NZP CSI-RS resources used for interference measurement.

[0461] If configured to report a CQI index in the CSI reference resource, the UE shall assume the following for deriving the CQI index and, if also configured, for deriving PMI and RI:

[0462] -The first 2 OFDM symbols are occupied by control signaling.

[0463] -The number of PDSCH and DM-RS symbols is equal to 12.

[0464] -Configure the same bandwidth part subcarrier spacing as for PDSCH reception

[0465] - The bandwidth configured for the corresponding CQI report.

[0466] - Reference resource usage CP length and subcarrier spacing configured for PDSCH reception

[0467] - The primary synchronization signal or the secondary synchronization signal or the PBCH does not use resource elements.

[0468] - Redundancy version 0.

[0469] -The ratio of PDSCH EPRE to CSI-RS EPRE is given in clause 5.2.2.3.1.

[0470] - It is assumed that no REs are allocated for NZP CSI-RS and ZP CSI-RS.

[0471] - 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.

[0472] -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.

[0473] - It is assumed that the PDSCH symbol does not contain DM-RS.

[0474] -Assume that the PRB bundling size is 2 PRBs.

[0475] -PDSCH transmission scheme, where the UE may assume that PDSCH transmissions will be performed with up to 8 transmission layers as defined in clause 7.3.1.4 of [4, TS 38.211]. For CQI calculation, the UE shall assume that the PDSCH signals on antenna ports in the set [1000, ..., 1000+v-1] of v layers will result in signals equivalent to the corresponding symbols transmitted on antenna ports [3000, ..., 3000+P-1], as given by

[0476]

[0477] where x(i) = [x (0) (i)…x (ν-1) (i)] Tis a vector of layer-mapped PDSCH symbols as defined in clause 7.3.1.4 from [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 which the CQI is reported 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 which the CQI is reported is set to "cri-RI-CQI", W(i) is the precoding matrix corresponding to the procedure described in clause 5.2.1.4.2. If the higher-layer parameter reportQuantity in the CSI-ReportConfig for which the CQI is reported is set to "cri-RI-i1-CQI", then W(i) is the precoding matrix corresponding to i1 reported according to the procedure described 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 for which the CQI is reported is set to "cri-RI-PMI-CQI" or "cri-RI-LI-PMI-CQI", the corresponding CSI-RS resource set used for channel measurement is configured with two resource groups and N resource pairs, as described in clause 5.2.1.4.1, the reported CQI corresponds to an entry 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

[0478] -v 1 The set of layers [1000,...,1000+v 1 The PDSCH signal on the antenna ports [3000, ..., 3000+P-1] of the group 1 CSI-RS resources in the resource pair indicated by CRI will result in a signal equivalent to the corresponding symbol sent on the antenna ports [3000, ..., 3000+P-1] of the group 1 CSI-RS resources in the resource pair indicated by CRI, and v 2 The set of layers [1000+v 1 , ..., 1000+v 1 +v 2The PDSCH signal on the antenna ports [3000, ..., 3000+P-1] of the group 2 CSI-RS resources in the resource pair indicated by CRI will result in a signal equivalent to the corresponding symbol sent on the antenna ports [3000, ..., 3000+P-1] of the group 2 CSI-RS resources in the resource pair indicated by CRI, as given by

[0479]

[0480] Where W j (i), j=1,2 are two precoding matrices corresponding to two reported PMIs applicable to x(i), as described in Section 5.2.1.4.2; and index j=1,2 is associated with two resource groups configured in the corresponding CSI-RS resource set for channel measurement; 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 the other v (j mod 2)+1 The interference of each layer depends on the (j mod 2)+1 The channel measurements and precoding matrices corresponding to each layer are derived.

[0481] -The UE shall assume that v is 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 (j=1, 2).

[0482] Assume n' is the UL time slot index where CSI is reported. Let us first define four entities.

[0483] TD / DD basis vector length: Assume 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.

[0484] Measurement window: The CSI-RS measurement window is expressed as [k, k+W meas ] or [k, k+W meas -1], which represents the window in which the CSI-RS burst is measured to calculate the CSI report. Here, k is the (starting) time slot index, W meas is the measurement window length. In one example, W meas The unit of is in the (time) time slot. In one example, W measThe unit is a TD / DD (compression) unit.

[0485] Reporting / validity window: The CSI reporting (or validity) window is expressed 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, W CSI is the validity window length (in time slots). In one example, W meas The unit of is in the (time) time slot. In one example, W meas The unit is a TD / DD (compression) unit.

[0486] CSI reference resource: Assume that the CSI reference resource is (as in Release 15) a resource in the frequency and time domain that is used as a reference for the CQI requirement (10% BLER) associated with the CSI report in slot n′. Assume that the location of the CSI reference resource is denoted as n ref (time slot index).

[0487] 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. 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 .

[0488] In the following embodiments and examples, when the window size W meas When the unit is a 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, R ST As defined above. Similarly, when the window size W CSI When the unit is a TD / DD (compressed) unit, the window size expressed in the number of time slots can be expressed by W CSI NST or W CSI N ST R ST Given, where N ST is the TD / DD unit size, R ST As defined above. Therefore, 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.

[0489] In this disclosure, the relationship between the above four entities is discussed.

[0490] In the present disclosure, a CSI reference resource time slot n is defined in one or more embodiments of the present invention. ref .

[0491] Fig.18 An example 1800 of a UE configured to measure a CSI-RS burst based on an NZP CSI-RS resource within a measurement window according to an embodiment of the present disclosure is shown. Fig.18 The illustrated embodiment of the example 1800 of a UE configured to measure CSI-RS bursts based on NZP CSI-RS resources within a measurement window is for illustration only. Fig.18 The scope of the present disclosure is not limited to any particular implementation of example 1800 of a UE configured to measure CSI-RS bursts based on NZP CSI-RS resources within a measurement window.

[0492] 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.

[0493] In one example, if Fig.18 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) Both are no later than n ref .

[0494] 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 =nref 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 The timing of the CSI-RS burst, that is, k+W meas =n ref -δ or k+W meas -1=n ref -δ, where δ≥0 corresponds to the most recent CSI-RS burst, no later than n ref The minimum integer of the timing.

[0495] In one example, the starting slot index k is fixed or configured (eg, RRC), or is determined based on the configuration of the CSI-RS burst. When fixed, k may be k=n ref -δ k Or it can be given by k = n'-δ k Here, δ k is fixed. When configured, k can be k=n ref -α k Or k can be given by k = n'-α k Here, α k It is configured.

[0496] In one example, k and W meas Both are fixed. Use one of the examples in this article.

[0497] In one example, k and W meas Both are configured (eg, via RRC).

[0498] In one example, if Fig.18 As shown in Example 2 in FIG. 1 , 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 no later than n').

[0499] 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.

[0500] 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.

[0501] In one example, k and W meas Both are fixed. Use one of the examples in this article.

[0502] In one example, k and W meas Both are configured (eg, via RRC).

[0503] In one example, if Fig.18 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) not earlier (or later) than n ref .

[0504] 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) time slot that is no earlier than n ref The timing of the CSI-RS burst, that is, k = n ref -δ, where δ ≥ 0 corresponds to the first (or earliest) one that is no earlier than n ref The minimum integer of the timing of the CSI-RS burst.

[0505] 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 may be given by n′. When fixed, it may be given by n ref +δ k Or it can be given by n′-δ k Here, δ k is fixed. When configured, it can be changed by n ref +α k Or it can be given by n′-α k Here, α k It is configured.

[0506] In one example, k and W meas Both are fixed. Use an example from I.1.3.1 and I.1.3.2.

[0507] In one example, k and W meas Both are configured (eg, via RRC).

[0508] 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.

[0509] If the higher-layer parameter timeRestrictionForChannelMeasurements is set to "Not Configured", the UE shall derive channel measurements used to calculate the CSI value reported in uplink timeslot n based only on the NZP CSI-RS (defined in TS 38.211 [4]) associated with the CSI resource setting that is no later than the CSI reference resource.

[0510] If the higher-layer parameter timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "Configured", the UE shall derive channel measurements for calculating the CSI reported in uplink timeslot n based only on the timing of the most recent NZP CSI-RS associated with the CSI resource setting (defined in [4, TS 38.211]) that is no later than the CSI reference resource.

[0511] If the higher-layer parameter timeRestrictionForInterferenceMeasurements is set to "Not Configured", the UE shall derive interference measurements for calculating the reported CSI value in uplink time slot n only based on the CSI-IM and / or NZP CSI-RS for interference measurement associated with the CSI resource setting no later than the CSI reference resource.

[0512] If the higher-layer parameter timeRestrictionForInterferenceMeasurements in CSI-ReportConfig is set to "Configured", the UE shall derive the interference measurement used to calculate the reported CSI value in uplink time slot n based on the timing of the CSI-IM and / or NZP CSI-RS for interference measurement associated with the CSI resource setting (defined in [4, TS 38.211]) that is not later than the CSI reference resource.

[0513] About k and / or Wmeas , at least one of the following examples is used / configured.

[0514] In one example, when the time limit is turned on (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., which can be provided in CSI-ReportConfig). In one example, this example is used / configured for W only when the CSI report is based on a codebook other than a type II codebook that includes a Doppler component, such as DD basis vectors (which can be configured for high-speed UE scenarios). meas For example, the codebook may be a Release 15 / 16 / 17 Type II codebook, but not a Release 18 Type II codebook (including Doppler component). In one example, this example is used / configured for W only when CSI reporting is configured for low-speed UEs. meas .

[0515] In one example, if the high-level parameter timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "Configured",

[0516] For codebooks that do not include a Doppler component, such as Release 15 / 16 / 17 NR Type II codebooks, the UE shall only calculate the Doppler component based on the most recent CSI reference resource slot n, no later than ref The timing of the NZP CSI-RS associated with the CSI resource setting (i.e., W meas = 1) (defined in [4, TS 38.211]), derives the channel measurement used to calculate the CSI reported in uplink timeslot n.

[0517] For codebooks that include a Doppler component, such as Release 18 NR Type II codebook (for time / Doppler compression), the UE shall only base the UE on the most recent CSI reference resource slot n, no later than ref The measurement window (i.e., W meas > 1) (defined in [4, TS 38.211]), derives the channel measurement used to calculate the CSI reported in uplink time slot n. Here, W meas It may be fixed or configured (eg, via parameters in associated CSI resource settings or CSI reporting settings).

[0518] In one example, if the high-level parameter timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "Not Configured",

[0519] For codebooks that do not include a Doppler component, e.g., Release 15 / 16 / 17 NR Type II codebooks, the UE shall only base the NZP CSI-RS associated with the CSI resource setting (defined in [4, TS 38.211]) no later than the CSI reference resource (i.e., W meas =1 or >1), derives the channel measurement used to calculate the CSI reported in uplink time slot n.

[0520] For codebooks that include a Doppler component, such as Rel.18 NR Type II codebook (for time / Doppler compression), the UE shall only ref The NZP CSI-RS measurement window associated with the CSI resource setting (defined in [4, TS 38.211]) (i.e., W meas >1), derive the channel measurement used to calculate the CSI reported in uplink time slot n. Here, W meas It may be fixed or configured (eg, via parameters in associated CSI resource settings or CSI reporting settings).

[0521] In an example k≤n ref

[0522] For codebooks that do not include a Doppler component, such as Release 15 / 16 / 17 NR Type II codebooks, k and W meas The value depends on the gNB and / or UE implementation, i.e. neither is specified.

[0523] For codebooks that include a Doppler component, such as the Release 18 NR Type II codebook (for time / Doppler compression),

[0524] In one example, the value of k is fixed or configured, and W meas The value depends on the gNB and / or UE implementation, i.e., it is unspecified.

[0525] In one example, W meas The value is either fixed or configured and the k value depends on the gNB and / or UE implementation, i.e., it is unspecified.

[0526] In one example, k and W meas Both values ​​are specified, or both are fixed, or both are configurable, or one of the two values ​​is fixed and the other is configurable.

[0527] Based on legacy (Release 15 NR specification), CSI is not expected to be valid for slots after n'. However, the validity of CSI including DD / TD components based on CSI-RS burst measurements may need to be defined differently (different from the legacy definition) since the reported CSI may be expected to be valid for future slots where the gNB / NW may schedule DL transmissions. Several examples of potential enhancements to the validity window are provided below.

[0528] 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.

[0529] Fig.19 An example 1900 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. Fig.19 The illustrated embodiment of the example 1900 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window is for illustration only. Fig.19 The scope of the present disclosure is not limited to any particular implementation of example 1900 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window.

[0530] In one example, if Fig.19 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 according to one of the examples in this article.

[0531] In one example, if Fig.19 As shown in Example 2 in FIG. 1 , the CSI reporting / validity window includes the measurement window and 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. In one example, l=k, k+W meas <m and W CSI =W mon-meas In one example, the non-measurement window is included in [n ref 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 fIn 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, a non-measurement window is a prediction window in which the UE is expected to perform channel or CSI prediction (e.g., based on the CSI-RS measured in the measurement window) in order to calculate CSI. In one example, the UE is expected to start at or after a time slot with a "new" reference resource definition (i.e., l ≥ n ref ) starts predicting the channel / CSI, where the location of the “new” CSI reference resource is configured by the gNB via higher layer signaling (according to 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 can be included in a CSI request field triggered via DCI). The set of candidate values ​​for the start (l) of the CSI reference resource location includes the traditional slot location (n ref ) and CSI reporting time slot n′.

[0532] In one example, if Fig.19 As shown in Example 3 in FIG. 1 , 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. Therefore, k+W meas In one example, the non-measurement window is [n ref 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, a non-measurement window is a prediction window in which the UE is expected to perform channel or CSI prediction (e.g., based on the CSI-RS measured in the measurement window) in order to calculate CSI. In one example, the UE is expected to start at or after a time slot with a "new" reference resource definition (i.e., l ≥ n ref ) starts predicting the channel / CSI, where the location of the “new” CSI reference resource is configured by the gNB via higher layer signaling (according to 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 can be included in a CSI request field triggered via DCI). The set of candidate values ​​for the start (l) of the CSI reference resource location includes the traditional slot location (n ref ) and CSI reporting time slot n′.

[0533] Fig. 20An example 2000 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. Fig. 20 The illustrated embodiment of the example 2000 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window is for illustration only. Fig. 20 The scope of the present disclosure is not limited to any particular implementation of example 2000 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window.

[0534] In one example, if Fig. 20 As shown in Example 1 in FIG. 1 , the CSI reporting / validity window is located in the window [n ref , n′] inside, i.e., l>n ref , and l+W CSI <n′or l+W CSI -1<n′.

[0535] In one example, if Fig. 20 As shown in Example 2 in FIG. 1 , the CSI reporting / validity window has a starting index l=n. ref , and the end index is before n′, i.e., l+W CSI <n′or l+W CSI -1 <n′。

[0536] 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, l<n ref , and the end index is before n′, i.e., l+W CSI <n′or l+W CSI -1<n′.

[0537] In these examples, the UE is expected to perform channel or CSI prediction in time slots without CSI-RS measurement.

[0538] Fig.21 An example 2100 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. Fig.21 The illustrated embodiment of the example 2100 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window 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.

[0539] In one example, if Fig.21As 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′.

[0540] 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 , that is, l = n ref , and the end index is at n′, i.e., l+W CSI =n′ or l+W CSI -1=n′.

[0541] In one example, if Fig.21 As shown in Example 3 in FIG. 1 , the CSI reporting / validity window has its starting index 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′.

[0542] In these examples, the UE is expected to perform channel or CSI prediction in time slots without CSI-RS measurement.

[0543] Fig. 22 An example 2200 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. Fig. 22 The illustrated embodiment of the example 2200 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window 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.

[0544] In one example, if Fig. 22 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′, i.e., l+W CSI =n f or l+W CSI -1=n f .

[0545] In one example, n′>l>n ref, i.e., in this case the UE is expected to "predict" the channel / CSI after the slot with the reference resource.

[0546] In one example, l>n', ie in this case the UE is expected to "predict" the channel / CSI after time slot n' (where CSI is reported).

[0547] In one example, l≥n', i.e. in this case, the UE is expected to "predict" the channel / CSI after (with or without) time slot n' (where CSI is reported).

[0548] In one example, l=n′, i.e., in this case, the UE is expected to start from time slot n′ (where CSI is reported) and continue up to n future time slots. f “Predict” channel / CSI.

[0549] In one example, l>n' or l≥n', where l is fixed, or provided or configured via MAC CE or DCI based signaling (eg, RRC).

[0550] In one example, l=n′+D, where D is fixed, or provided or configured via MAC CE or DCI based signaling (eg, RRC). In one example, D≥0. In one example, D is the scheduling delay. In one example, D=4.

[0551] In one example, n f is fixed. In one example, n f is provided or configured via signaling based on MAC CE or DCI (e.g., RRC). In one example, based on the starting time slot l and W CSI To determine n f In one example, based on the starting time slot l and N 4 To determine n f In one example, based on the starting time slots l, N 4 and W CSI To determine n f .

[0552] 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 , that is, l = 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, based on the starting time slot l and W CSITo determine n f In one example, based on the starting time slot l and N 4 To determine n f In one example, based on the starting time slots l, N 4 and W CSI To determine n f .

[0553] In one example, if Fig. 22 As shown in Example 3 in FIG. 1 , the CSI reporting / validity window has its starting index 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, based on the starting time slot l and W CSI To determine n f In one example, based on the starting time slot l and N 4 To determine n f In one example, based on the starting time slots l, N 4 and W CSI To determine n f .

[0554] 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′ (where CSI is reported). Since n f is a future time slot index, so the reported CSI is expected to be valid for future time slots. To determine such a CSI report, the UE may perform CSI prediction or extrapolation for future time slots.

[0555] In one example, when the TD / DD basis vectors can provide some intrinsic prediction / inference capability beyond n' (without the UE having to try), 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, for example, time slot n f The BLER requirement of 10% is met.

[0556] In one example, n f =n′+Δ.

[0557] 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 (for example, via RRC) according to a set S (for example, S={0, 1} or {1, 2} or {0, 1, 2}).

[0558] In one example, n f =n ref +Δ.

[0559] 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 (for example, via RRC) according to a set S (for example, S={1, 2} or {2, 3} or {1, 2, 3}).

[0560] 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 (according to 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 ​​for the starting (l) position of the CSI reference resource includes the legacy slot position (n ref ) and CSI reporting time slot n′.

[0561] 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 (for example, via RRC) according to a set S (for example, S={1, 2} or {2, 3} or {1, 2, 3}).

[0562] Fig.23 An example 2300 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. Fig.23 The illustrated embodiment of the example 2300 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window is for illustration only. Fig.23 The scope of the present disclosure is not limited to any particular implementation of the example 2300 of a UE configured to determine a CSI report that is valid during a CSI reporting / validity window.

[0563] In one example, if Fig.23 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>nref , and the end index is located at time slot n f The second (or future) CSI reference resource at f >n', i.e., l+W CSI =n f or W CSI -1=n f .

[0564] In one example, n′>l>n ref , i.e., in this case the UE is expected to "predict" the channel / CSI after the slot with the reference resource.

[0565] • 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).

[0566] • In one example, l≥n', i.e., in this case, the UE is expected to "predict" the channel / CSI after (with or without) time slot n' (where CSI is reported).

[0567] In one example, l = n′, i.e., in this case, the UE is expected to start from slot n′ (where CSI is reported) and continue up to n future slots. f “Predict” channel / CSI.

[0568] • In one example, l>n' or l≥n', where l is fixed, or provided or configured via MAC CE or DCI based signaling (eg, RRC).

[0569] In one example, l=n′+D, where D is fixed, or provided or configured via MAC CE or DCI based signaling (eg, RRC). In one example, D≥0. In one example, D is the scheduling delay. In one example, D=4.

[0570] In one example, n f is fixed. In one example, n f is provided or configured via signaling based on MAC CE or DCI (e.g., RRC). In one example, based on the starting time slot l and W CSI To determine n f In one example, based on the starting time slots l and N 4 To determine n f In one example, based on the starting time slots l, N 4 and W CSI To determine n f .

[0571] In one example, if Fig.23 As shown in Example 2 in FIG. 1 , the CSI reporting / validity window has its starting index at n ref , that is, l = n ref , and the end index is located 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, based on the starting time slot l and W CSI To determine n f In one example, based on the starting time slot l and N 4 To determine n f In one example, based on the starting time slots l, N 4 and W CSI To determine n f .

[0572] In one example, if Fig.23 As shown in Example 3 in FIG. 1 , the CSI reporting / validity window has its starting index at n ref Before, that is, <n ref , and the end index is located 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, based on the starting time slot l and W CSI To determine n f In one example, based on the starting time slot l and N 4 To determine n f In one example, based on the starting time slots l, N 4 and W CSI To determine n f .

[0573] 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 In the same tradition as above, the second CSI reference resource is 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 location of the second CSI reference resource may be the same as the first CSI reference resource.

[0574] In one example, the UE is not expected 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 on whether the UE measures the NZP CSI-RS resource associated with the second CSI reference resource is provided (configured) to the UE.

[0575] 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.

[0576] In one example, a 1 <n ref And b 1 =n ref , and a 2 =n ref And b 2 =n f .

[0577] In one example, a 1 =n ref And b 1 =n f , and a 2 =n f And b 2 >n f .

[0578] When the frequency domain granularity of CQI reporting is WB, two WB CQI values ​​are reported. When the frequency domain granularity of CQI reporting is SB, two WB CQI values ​​and 2N are reported. SB CQI values ​​(one for each CB).

[0579] In one example, the CSI reporting / validity window is fixed. For example, using one of the examples in this article.

[0580] 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.

[0581] 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 n f The value of 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 one of the examples herein.

[0582] 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 the tradition). In one example, the second window is according to one of the examples herein.

[0583] In one example, two CSI reporting windows are based on 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 (according to 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 ​​for the starting (l) position of the CSI reference resource includes the legacy slot position (n ref ) and CSI reporting time slot n′.

[0584] In one example, two or more CSI reporting windows are based on the starting time slot with 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 (according to multiple candidate values), or via a codepoint indication in a MACCE 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 ​​for the start (l) of the CSI reference resource position includes the legacy slot position (n ref ) and CSI reporting time slot n′.

[0585] In one embodiment, the UE is configured with a CSI reporting / validity window [l, l+W as described above CSI -1]. About W CSI , at least one of the following examples is used / configured.

[0586] In one example, l=n ref And W CSI =1, and n refis the time slot index of the CSI reference resource. That is, the CSI reporting / validity window includes only one time slot, which is 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 version 15 / 16 / 17 type II codebook or a version 18 codebook without a Doppler component report, but the codebook cannot be a version 18 type II codebook (including a Doppler component). In one example, this example is used / configured for the CSI reporting window only when the CSI report is configured for low-speed UEs. In one example, when W CSI =1, N 4 The value of = 1 (meaning that Doppler domain compression is not required).

[0587] In one example, l=n ref And W CSI In one example, W CSI = 1 for codebooks that do not include a Doppler component, e.g., Release 15 / 16 / 17 NR Type II codebooks, or Release 18 codebooks without Doppler component reporting, and W CSI >1, for codebooks that include a Doppler component, e.g., Release 18 NR Type II codebook (for time / Doppler compression). In one example, W CSI = 1 for codebooks that do not require any (UE-side or gNB-side) prediction, e.g., Release 15 / 16 / 17 NR Type II codebooks, or Release 18 codebooks without Doppler component reporting, and W CSI >1, for codebooks that require prediction (either at the UE or gNB side), e.g., Release 18 NR Type II codebook (for time / Doppler compression). In one example, when W CSI =1, N 4 The value of = 1 (meaning that Doppler domain compression is not required).

[0588] 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 includes only one timeslot, which is 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 version 15 / 16 / 17 type II codebook or a version 18 codebook without a Doppler component report, but the codebook cannot be a version 18 type II codebook (including a Doppler component). In one example, this example is used / configured for the CSI reporting window only when the CSI report 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).

[0589] In one example, l=n′ and W CSI In one example, W CSI = 1 for codebooks that do not include a Doppler component, e.g., Release 15 / 16 / 17 NR Type II codebooks, or Release 18 codebooks without Doppler component reporting, and W CSI >1, for codebooks that include a Doppler component, e.g., Release 18 NR Type II codebook (for time / Doppler compression). In one example, W CSI = 1 for codebooks that do not require any (UE-side or gNB-side) prediction, e.g., Release 15 / 16 / 17 NR Type II codebooks, or Release 18 codebooks without Doppler component reporting, and W CSI >1, for codebooks that require prediction (either at the UE or gNB side), e.g., Release 18 NR Type II codebook (for time / Doppler compression). 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 4The 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).

[0590] In one example, l=x and W CSI = 1, and x is 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 (according to 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 ​​for the starting (l) position of the CSI reference resource includes the legacy slot position (n ref ) and CSI reporting time slot n′. That is, the CSI reporting / validity window includes 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 Release 15 / 16 / 17 type II codebook or a Release 18 codebook without a Doppler component report, but the codebook cannot be a Release 18 type II codebook (including a Doppler component). In one example, this example is used / configured for the CSI reporting window only when the CSI report 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 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).

[0591] In one example, l=x and W CSIis configured (e.g., via RRC, or MAC CE or DCI), and x is 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 (according to 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 ​​for the starting (l) position of the CSI reference resource includes the legacy slot position (n ref ) and CSI reporting time slot n′. In one example, W CSI = 1 for codebooks that do not include a Doppler component, e.g., Release 15 / 16 / 17 NR Type II codebooks, or Release 18 codebooks without Doppler component reporting, and W CSI >1, for codebooks that include a Doppler component, e.g., Release 18 NR Type II codebook (for time / Doppler compression). In one example, W CSI = 1 for codebooks that do not require any (UE-side or gNB-side) prediction, e.g., Release 15 / 16 / 17 NR Type II codebooks, or Release 18 codebooks without Doppler component reporting, and W CSI >1, for codebooks that require prediction (either at the UE or gNB side), e.g., Release 18 NR Type II codebook (for time / Doppler compression). 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).

[0592] In one example, W CSI The 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 CSI The value is determined accordingly (fixed / configured). In one example, whether UE-side prediction is needed depends on W CSI value.

[0593] In one example, l=k and k is fixed or configured as described above.

[0594] In one example, when the CQI calculation is conditioned on a PMI determined based on a codebook including a Doppler component (e.g., Release 18 NR Type II codebook (for time / Doppler compression)), the PMI is expected to be valid for the CSI reporting window, where W CSI >1, and regarding CQI, at least one of the following is used / configured.

[0595] CQI is expected in reference time slot n ref The block error (BLER) probability requirement (e.g., 0.1) is met.

[0596] CQI is expected to be within W of the CSI reporting window CSI The block error rate (BLER) requirement (e.g., 0.1) is met at time slot s within a time slot. Here, s can be fixed (e.g., the first or last one in the window) or configured.

[0597] CQI is expected to be within 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.

[0598] When the CQI calculation is conditioned on a PMI determined based on a codebook that does not include a Doppler component (e.g., Release 15 / 16 / 17 NR Type II codebook), the PMI is expected to be in reference slot n. ref is valid at time n, and CQI is expected to be in reference time slot n ref The block error (BLER) probability requirement (e.g., 0.1) is met.

[0599] 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.

[0600] In one example, the UE is configured to meas To determine N 4 The value of and based on the measurement window [k, k+W meas ] or [k, k+W meas -1] to determine N 4 The location of the TD / DD unit.

[0601] In one example, N 4 =W meas (in TD / FD units), or W meas N ST (in time slots), or Wmeas N ST R ST (in units of sub-time slots). 4 The position of each TD / DD unit corresponds to the measurement window. ST ≤1, we can write where d is a positive integer with values ​​from {1, 2, 3, ...}, and in this case, W meas =dN 4 .

[0602] 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 ≤1, we can write where d is a positive integer with values ​​from {1, 2, 3, ...}, and in this case, W meas =dN 4 .

[0603] 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).

[0604] 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).

[0605] 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).

[0606] In one example, N 4 ≥R ST ×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).

[0607] In one example, the UE is configured to meas To determine N4 The value of , and based on the CSI reporting / validity window [l, l+W CSI ] or [l, l+W CSI -1] to determine N 4 The location of the TD / DD unit.

[0608] In one example, N 4 =W meas (in TD / FD units), or W meas N ST (in time slots), or W meas N ST R ST (in units of sub-time slots).

[0609] In one example, N 4 >W meas .

[0610] In one example, N 4 >R ST ×W meas .

[0611] In one example, N 4 ≥W meas .

[0612] In one example, N 4 ≥R ST ×W meas .

[0613] N 4 The location of the TD / DD cells corresponds to the CSI reporting / validity window (when N 4 =W CSI ) or a (smaller sized) sub-window within the CSI reporting / validity window (when N 4 <W CSI hour).

[0614] In one example, the UE is configured to meas To 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] to determine N 4 The location of the TD / DD unit.

[0615] In one example, N 4 =W meas (in TD / FD units), or Wmeas N ST (in time slots), or W meas N ST R ST (Sub-time slot as unit)

[0616] In one example, N 4 >W meas .

[0617] In one example, N 4 >R ST ×W meas .

[0618] In one example, N 4 ≥W meas .

[0619] In one example, N 4 ≥R ST ×W meas .

[0620] N 4 The location of the TD / DD cells corresponds to the larger window that includes both 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].

[0621] In one example, the UE is configured to CSI To determine N 4 The value of and based on the measurement window [k, k+W meas ] or [k, k+W meas -1] to determine N 4 The location of the TD / DD unit.

[0622] In one example, N 4 =W CSI (in TD / FD units), or W CSI N ST (in time slots), or W CSI N ST RST (in units of sub-time slots).

[0623] In one example, N 4 =R ST ×W CSI , where R ST ≥1 or <1. ST The value of can be fixed or configured (e.g., based on RRC or MAC CE or DCI). ST ≤1, we can write Where d is a positive integer with values ​​from {1, 2, 3, ...}. In this case, W CSI =dN 4 .

[0624] In one example, N 4 <W CSI .

[0625] In one example, N 4 <R ST ×W CSI .

[0626] In one example, N 4 ≤W CSI .

[0627] In one example, N 4 ≤R ST ×W CSI .

[0628] 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).

[0629] In one example, the UE is configured to CSI To determine N 4 The value of , and based on the CSI reporting / validity window [l, l+W CSI ] or [l, l+W CSI -1] to determine N 4 The location of the TD / DD unit.

[0630] In one example, N 4 =W CSI (in TD / FD units), or W CSI N ST (in time slots), or W CSI N STR ST (in units of sub-time slots). 4 The location of each TD / DD unit corresponds to the CSI reporting / validity window. ST ≤1, we can write Where d is a positive integer with values ​​from {1, 2, 3, ...}. In this case, W CSI =dN 4 .

[0631] 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 ≤1, we can write where d is a positive integer with values ​​from {1, 2, 3, ...}, and in this case, W CSI =dN 4 .

[0632] In one example, N 4 <W CSI . N 4 The locations of the TD / DD units are included in the CSI reporting / validity window.

[0633] In one example, N 4 <R ST ×W CSI . N 4 The locations of the TD / DD units are included in the CSI reporting / validity window.

[0634] In one example, N 4 ≤W CSI . N 4 The location of each TD / DD unit corresponds to or is included in the CSI reporting / validity window.

[0635] In one example, N 4 ≤R ST ×W CSI . N 4 The location of each TD / DD unit corresponds to or is included in the CSI reporting / validity window.

[0636] In one example, the UE is configured to CSI To determine N 4 The value of and based on the measurement window [k, k+Wmeas ] or [k, k+W meaS -1] and CSI reporting / validity window [l, l+W CSI ] or [l, l+W CSI -1] to determine N 4 The location of the TD / DD unit.

[0637] In one example, N 4 =W CSI (in TD / FD units), or W CSI N ST (in time slots), or W CSI N ST R ST (in units of sub-time slots).

[0638] 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 ≤1, we can write where d is a positive integer with values ​​from {1, 2, 3, ...}, and in this case, W CSI =dN 4 .

[0639] In one example, N 4 <W CSI .

[0640] In one example, N 4 <R ST ×W CSI .

[0641] In one example, N 4 ≤W CSI .

[0642] In one example, N 4 ≤R ST ×W CSI .

[0643] N 4 The location of the TD / DD cells corresponds to the larger window that includes both 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 +WCSI 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].

[0644] 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] to determine N 4 The location of the TD / DD unit.

[0645] In one example, N 4 =f(W meas , W CSI )(in TD / FD units), or f(W meas , W CSI )N ST (in time slots), or f(W meas , W CSI )N ST R ST (in units of sub-time slots).

[0646] 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 ≤1, we can write Where d is a positive integer with values ​​according to {1, 2, 3, ...}, in this case, f(W meas , W CSI ) = dN 4 .

[0647] In one example, N 4 <f(W meas , W CSI ).

[0648] In one example, N 4 <R ST ×f(W meas , W CSI ).

[0649] In one example, N 4 ≤f(W meas , W CSI ).

[0650] In one example, N 4 ≤R ST ×f(W meas , W CSI ).

[0651] 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 ).

[0652] 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).

[0653] In one example, the UE is configured to meas and W CSI Both determine N 4 The value of , and based on the CSI reporting / validity window [l, l+W CSI ] or [l, l+W CSI -1] to determine N 4 The location of the TD / DD unit.

[0654] In one example, N 4 =f(W meas , W CSI )(in TD / FD units), or f(W meas , W CSI )N ST (in time slots), or f(W meas , W CSI )N ST R ST (in units of sub-time slots).

[0655] 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 ≤1, we can write where d is a positive integer with values ​​according to {1, 2, 3, ...}, and in this case, f(W meas , W CSI ) = dN 4 .

[0656] In one example, N 4 <f(W meas , W CSI ).

[0657] In one example, N 4 <R ST ×f(W meas , W CSI ).

[0658] In one example, N 4 ≤f(W meas , W CSI ).

[0659] In one example, N 4 ≤R ST ×f(W meas , W CSI ).

[0660] 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 ).

[0661] N 4 The location of N TD / DD cells corresponds to the CSI reporting / validity window (eg, when measurement window = CSI reporting window). 4The location of a TD / DD unit includes (all or part of) the CSI reporting / validity window and the non-measurement window (eg, when the measurement window is smaller than the CSI reporting window).

[0662] 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] to determine N 4 The location of the TD / DD unit.

[0663] In one example, N 4 =f(W meas , W CSI )(in TD / FD units), or f(W meas , W CSI )N ST (in time slots), or f(W meas , W CSI )N ST R ST (in units of sub-time slots).

[0664] 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 ≤1, we can write where d is a positive integer with values ​​according to {1, 2, 3, ...}, and in this case, f(W meas , W CSI ) = dN 4 .

[0665] In one example, N 4 <f(W meas , W CSI ).

[0666] In one example, N 4 <R ST ×f(W meas , W CSI ).

[0667] In one example, N 4 ≤f(W meas , W CSI ).

[0668] In one example, N 4 ≤R ST ×f(W meas , W CSI ).

[0669] N 4 The location of the TD / DD cells corresponds to the larger window that includes both 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].

[0670] Fig.24 FIG. 1 shows a method configured to determine N according to an embodiment of the present disclosure. 4 Example 2400 of a UE with a value of . Fig.24 is configured to determine N 4 The example 2400 embodiment of the UE with the value of is for illustration only. Fig.24 The scope of the present disclosure is not limited to a device configured to determine N 4 any particular implementation of example 2400 of UE of the value.

[0671] In one example, if Fig.24 As shown, the UE is configured to determine N according to at least one of the following examples: 4 The value of .

[0672] In one example (Ex1 in the figure), N 4 =mk or m-k+1, where n ref <m <n′。

[0673] In one example (Ex2 in the figure), N 4 =mz or m-z+1, where n ref <m<n′ and k<z <n ref .

[0674] In one example (Ex3 in the figure), N 4 =mn ref or mn ref +1, where n ref <m<n′。

[0675] In one example (Ex4 in the figure), N 4 =n′-k or n′-k+1.

[0676] In one example (Ex5 in the figure), N 4 =n′-z or n′-z+1, where k<z<n ref .

[0677] In one example (Ex6 in the figure), N 4 =n′-n ref or n′-n ref +1.

[0678] In one example (Ex7 in the figure), N 4 =n f -k or n f -k+1.

[0679] In one example (Ex8 in the figure), N 4 =n f -z or n f -z+1, where k<z<n ref .

[0680] In one example (Ex9 in the figure), N 4 =n f -n ref or f -n ref +1. Here, W CSI The start (time slot) is n ref .

[0681] In one example, N 4 =W CSI =n f -n′ or n f -n′+1. Here, W CSI The start (time slot) of is n′.

[0682] In one example, N 4 =W CSI R ST =(n f -n′)R ST or (n f -n′+1)R ST , where RST ≥ 1 or < 1. R ST The value of can be fixed or configured (e.g., based on RRC or MAC CE or DCI). N 4 The positions of the N TD / DD units correspond to the CSI report / validity window. Here, W CSI The start (time slot) of is n'. When R ST ≤ 1, we can write where d is a positive integer taking values from {1, 2, 3,...}, and in this case, W CSI = dN 4 .

[0683] · 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. R ST The value of can be fixed or configured (e.g., via RRC or MAC CE or DCI). N 4 The positions of the N TD / DD units correspond to the CSI report / validity window. Here, W CSI The start (time slot) of is n ref . When R ST ≤ 1, we can write where d is a positive integer taking values from {1, 2, 3,...}, and in this case, W CSI = dN 4 .

[0684] · In one example, N 4 = W CSI = n f - l or n f - l + 1, where, n' < l or n' ≤ l. Here, W CSI The start (time slot) of is l. The value of l can be fixed or configured (e.g., via RRC or MAC CE or DCI).

[0685] · In one example, N 4 = W CSI R ST = (n f - l)R ST or (n f - l + 1)R ST , where, RST ≥ 1 or < 1, and n′ < l or n′ ≤ l. Here, W CSI starts (time slot) at l. The value of l can be fixed or configured (e.g., via RRC or MAC CE or DCI). R ST value can be fixed or configured (e.g., via RRC or MAC CE or DCI). N 4 positions of TD / DD units correspond to CSI report / validity window. When R ST ≤ 1, we can write where d is a positive integer taking values from {1, 2, 3, …}, and in this case, W CSI = dN 4 .

[0686] · In one example, W CSI starts (time slot) at n ref or l, and one of these two 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 configured according to {0, 1, 2, 3, 4, 6, 8}.

[0687] In one example, the R ST value is the same for CQI and PMI reports (i.e., one value). In one example, the R ST value can be different for CQI and PMI reports (i.e., two independent values).

[0688] In one example, when W CSI = dN 4 , the value of d can be fixed (e.g., 1), or configured. When configured, it can be configured according to {1, x}, where x = a value proportional to the period (p) of the periodic or semi - persistent NZP CSI - RS resource, or the interval (m) between two consecutive aperiodic NZP CSI - RS resources triggered jointly by a single DCI for K > 1 aperiodic CSI - RS resources. In one example, x = p or x = m resources. Note, d can be equivalent to one of the following definitions:

[0689] · UE side: Duration (desired effective time) of each of the (uncompressed) N4 precoding matrices before DD / TD compression.

[0690] · gNB side: Duration (desired effective time) of each of the reconstructed / decompressed N4 precoding matrices.

[0691] Note: d is the size of each TD / DD unit of PMI.

[0692] In one example, W CSI The value can be WCS I = 1. In one example, WCS I =1 means d = 1 and N 4 =1. In one example, even when N 4 >1, W CSI = 1 can also be configured, in which case, Using this as a possible value can reduce the UE burden (complexity) of UE-side prediction (e.g., channel prediction) and can also avoid the problem of UE-side prediction due to wider CSI reporting windows (when W CSI >1) resulting in excessive user throughput loss due to the strict 10% BLER requirement.

[0693] Also, when W CSI When TD / DD unit size of PMI = DD / TD unit size of CQI = 1.

[0694] In one example, W may be determined / configured according to one of the following: CSI :

[0695] (A)W CSI =1 (e.g., d = N 4 =1) or

[0696] (B)W CSI >1 (e.g., W CSI =dN 4 >1 or d and N 4 At least one of >1).

[0697] In one example, W may be determined / configured according to one of the following: CSI :

[0698] If the first condition is met, then (A)W CSI =1 (e.g., d = N 4 =1),

[0699] If the second condition is met, then (B) W CSI >1 (e.g., W CSI =dN 4 >1 or d and N 4 At least one of > 1),

[0700] ·(C)W CSI Configured as (A)W CSI =1 or (B)W CSI > 1. The configuration may be via higher layers (RRC).

[0701] In one example, the first condition corresponds to at least one of the following.

[0702] In one example, the first condition corresponds to the case when l ≥ n′ (ie, the CSI reporting window W CSI The start of is at time slot l which is equal to the CSI reporting time slot), where n′ is as defined in this document.

[0703] In one example, the second condition corresponds to at least one of the following.

[0704] In one example, the second condition corresponds to when l=n ref When (i.e., CSI reporting window W CSI The start is at time slot l which is equal to the CSI reference resource time slot), where n ref As defined herein.

[0705] In one example, W may be determined / configured according to one of the following: CSI :

[0706] If the second condition is met, then (B) W CSI >1 (e.g., W CSI =dN 4 >1 or d and N 4 At least one of > 1),

[0707] ·(C)W CSI Configured as (A)W CSI =1 or (B)W CSI > 1. The configuration may be via higher layers (RRC).

[0708] In one example, when in the time domain (eg, across W CSI ), each of the X CQIs has Therefore, CQI, When W CSI =dN 4 When In one example, X is fixed (e.g., 1). In one example, X is configured (e.g., RRC), for example, according to {1, 2} or {1, N4} or {1, 2, N4}. In one example, X is reported by the UE.

[0709] In one embodiment, the UE is configured with a CSI reference window including multiple time instances (time slots). Specifically, the CSI reference resource window of the serving cell is defined as follows:

[0710] - 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.

[0711] - In the time domain, the CSI reference resource window for the CSI report in uplink time slot n′ is composed of the window [m, m+W ref -1]Definition.

[0712] 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 a Release 18 NR Type II codebook (for time / Doppler compression).

[0713] In one example, the window includes the conventional CSI reference resource slot n ref , which is defined as: Among them, K offset is a parameter configured by higher layers, as specified in clause 4.2 of [6TS38.213], and in which, is the K with value 0 in frequency range 1 offset subcarrier spacing configuration.

[0714] in, μ DL and μ UL are the subcarrier spacing configurations for DL ​​and UL, respectively, and μ offset Determined by the ca-SlotOffset configured by higher layers of the cell transmitting uplink and downlink, as defined in clause 4.5 of [4, TS 38.211].

[0715] In one example, m=n ref .

[0716] In one example, m+W ref -1=n ref .

[0717] In one example, m<n ref , and n ref <m+W ref -1.

[0718] In one example, CSI reference resource window = CSI reporting window, i.e., l = m, and W CSI =W ref .

[0719] In one example, CSI reference resource window = CSI measurement window, that is, k = m, and W meas =W ref .

[0720] In one example, CSI reference resource window = CSI measurement = CSI reporting window, i.e., k = l = m, and W meas +W CSI =W ref .

[0721] 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.

[0722] 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.

[0723] 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.

[0724] In one example, the CSI reference resource window is such that m=n ref , and m+W ref -1=l+W CSI -1.

[0725] 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 the future time slot after the time slot in which the CSI is reported.

[0726] In one example, the CSI reference resource window is such that m=n′, and m+W ref -1=l+W CSI -1.

[0727] In one example, N 4 =W ref .

[0728] In one example, N 4 =W ref R ST , 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 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, for both CQI and PMI reporting, R ST The values ​​can be different (ie, two separate values).

[0729] In one example, at slots within the CSI reference resource window, CQI is expected to be calculated and meet the BLER requirement (eg, 0.1), and PMI is expected to be calculated / valid for all slots or a subset of slots within the CST reference resource window.

[0730] Alternatively, in one example, for all slots or a subset of slots within the CSI reference resource window, the CQI is expected to be calculated and meet the BLER requirement (e.g., 0.1), and for all slots or a subset of slots within the CSI reference resource window, the PMI is expected to be calculated / valid.

[0731] Fig.25 An example method 2500 performed by a UE in a wireless communication system according to an embodiment of the present disclosure is shown. Fig.25 The method 2500 can be composed of Figure 1 Any of UEs 111-116 (such as Figure 3 UE 116) is executed, and the corresponding method can be performed by Figure 1 Any of BS101-103 (such as Figure 2 The method 2500 is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0732] The method begins with the UE receiving a configuration for CSI reporting (2510). For example, in 2510, the configuration includes information indicating (i) a set of time slots for which the CSI report is valid, (ii) a CSI reference resource, and (iii) an uplink (UL) time slot n′. The UE then identifies the set of time slots and the CSI reference resource (2520). For example, at 2520, the UE may identify the set of time slots and the CSI reference resource based on the information in the configuration.

[0733] The UE then determines a CSI report for the identified set of time slots (2530). For example, at 2530, the UE may determine a CSI report for the identified set of time slots based on the CSI reference resource. The UE then sends the CSI report in a UL time slot (2540). For example, in 2540, the UL time slot is UL time slot n′, and the set of time slots includes time slot n of the CSI reference resource. ref At least one time slot i after that, which means n ref <i.

[0734] In one or more of the above embodiments or examples, the set of time slots includes at least two time slots {n ref , i}, where i∈{n ref +1,...,n′,...,n f}, and n f >n' is a future time slot. For example, the set of time slots is composed of time slots with indices [l, ..., l+W CSI -1] CSI time window of time slots, l is W CSI The index of the first time slot in the set S is taken, and W CSI ≥1.

[0735] In one or more of the above embodiments or examples, the set S includes the value {n ref , n′, n f}, when l = n ref When the time window includes the time slot index [n ref , n ref +W CSI +1], when l = n′, the time window includes the time slot index [n′, n′+W CSI +1], and when l = n f When the time window includes the time slot index [n f , n f +W CSI +1]. In some examples, when n f = n′+δ: The set S includes the values ​​{n ref , n′+δ}, and the information indicates l=n re In some examples, the UE report indicates whether the UE can support l=n ref UE capability information of the value.

[0736] In one or more of the above embodiments or examples, W CSI The value of W is determined CSI =N 4d, where N 4 is the number of time domain (TD) units, and d is the number of time slots in a TD unit, when N 4 =1 and d=1, W CSI =1, when N 4 When at least one of and d is greater than 1, W CSI >1, and the information indicates that N is a set of values ​​including {1, x} and {1, m, p} respectively. 4 and d. Here, x>1, m is the interval between two consecutive non-periodic non-zero power (NZP) CSI-reference signal (RS) resources from K>1 non-periodic NZP CSI-RS resources configured for CSI reporting, and p is the period of the periodic or semi-persistent NZP CSI-RS resources configured for CSI reporting. In some examples, when l≥n′, W CSI ≥1, and when l=n ref When W CSI >1,.

[0737] Fig.26 The structure of a UE according to an embodiment of the present disclosure is shown.

[0738] like Fig.26 As shown, the UE according to the embodiment may include a transceiver 2610, a memory 2620, and a processor 2630. The transceiver 2610, the memory 2620, and the processor 2630 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 2630, the transceiver 2610, and the memory 2620 may be implemented as a single chip. In addition, the processor 2630 may include at least one processor. In addition, Fig.26 The UEs correspond to UEs 111, 113, 114, 115, and 116.

[0739] The transceiver 2610 is collectively referred to as a UE receiver and a UE transmitter, and can send signals to / receive signals from a base station or a network entity. The signals sent to or received from a base station or a network entity may include control information and data. The transceiver 2610 may include an RF transmitter for up-converting and amplifying the frequency of the transmitted signal, and an RF receiver for amplifying the frequency of the low noise and down-converting the received signal. However, this is merely an example of the transceiver 2610, and the components of the transceiver 2610 are not limited to the RF transmitter and the RF receiver.

[0740] In addition, the transceiver 2610 may receive a signal through a wireless channel and output it to the processor 2630 , and transmit a signal output from the processor 2630 through a wireless channel.

[0741] The memory 2620 may store programs and data required for the operation of the UE. In addition, the memory 2620 may store control information or data included in a signal obtained by the UE. The memory 2620 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.

[0742] The processor 2630 may control a series of processes so that the UE operates as described above. For example, the transceiver 2610 may receive a data signal including a control signal sent by a base station or a network entity, and the processor 2630 may determine a result of receiving the control signal and the data signal sent by the base station or the network entity.

[0743] Fig. 27 The structure of a base station according to an embodiment of the present disclosure is shown.

[0744] like Fig. 27 As shown, the base station according to the embodiment may include a transceiver 2710, a memory 2720, and a processor 2730. The transceiver 2710, the memory 2720, and the processor 2730 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 those described above. In addition, the processor 2730, the transceiver 2710, and the memory 2720 may be implemented as a single chip. In addition, the processor 2730 may include at least one processor. In addition, Fig. 27 The base station can correspond to Figure 1 BS101, 102 and 103.

[0745] The transceiver 2710 is collectively referred to as a base station receiver and a base station transmitter, and can send / receive signals to / from a terminal (UE) or a network entity. The signals sent to or received from a terminal or a network entity may include control information and data. The transceiver 2710 may include an RF transmitter for up-converting and amplifying the frequency of a transmitted signal, and an RF receiver for amplifying the frequency of a low noise and down-converting a received signal. However, this is merely an example of the transceiver 2710, and the components of the transceiver 2710 are not limited to the RF transmitter and the RF receiver.

[0746] In addition, the transceiver 2710 may receive a signal through a wireless channel and output it to the processor 2730 , and transmit a signal output from the processor 2730 through a wireless channel.

[0747] The memory 2720 may store programs and data required for the base station operation. In addition, the memory 2720 may store control information or data included in the signal obtained by the base station. The memory 2720 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.

[0748] The processor 2730 may control a series of processes so that the base station operates as described above. For example, the transceiver 2710 may receive a data signal including a control signal transmitted by a terminal, and the processor 2730 may determine a result of receiving the control signal and the data signal transmitted by the terminal.

[0749] 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 is coupled to the transceiver and is configured to receive configuration information about a channel state information (CSI) report from a base station, the configuration information including a set of time slots for which the CSI report is valid, at least one CSI reference resource, and an uplink (UL) time slot, determine a CSI report for the set of identified time slots based on the configuration information, and send the CSI report to the base station in the UL time slot. The set of time slots includes at least one time slot after a reference time slot of the CSI reference resource.

[0750] The set of time slots corresponds to a time window comprising the time slot with the index.

[0751] The controller is further configured to report UE capability information indicating whether an index of a first time slot among the time slots corresponds to a reference time slot.

[0752] The value of the time slot is determined based on the number of time domain (TD) units and the number of time slots in one of the TD units.

[0753] 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 about a channel state information (CSI) report from a base station, the configuration information including a set of time slots for which the CSI report is valid, at least one CSI reference resource, and an uplink (UL) time slot, determining a CSI report for the set of identified time slots based on the configuration information, and sending the CSI report to the base station in the UL time slot. The set of time slots includes at least one time slot after a reference time slot of the CSI reference resource.

[0754] The set of time slots corresponds to a time window comprising the time slot with the index.

[0755] The method also includes reporting UE capability information indicating whether an index of a first time slot among the time slots corresponds to a reference time slot.

[0756] The value of the time slot is determined based on the number of time domain (TD) units and the number of time slots in one of the TD units.

[0757] According to an embodiment, a base station (BS) in a wireless communication system is provided. The BS includes a transceiver and a controller, the controller is coupled to the transceiver and is configured to identify configuration information about a channel state information (CSI) report, the configuration information including a set of time slots for which the CSI report is valid, at least one CSI reference resource, and an uplink (UL) time slot, send the configuration information to a user equipment (UE), and receive the CSI report from the UE in the UL time slot. The set of time slots includes at least one time slot after the reference time slot of the CSI reference resource.

[0758] The set of time slots corresponds to a time window comprising the time slot with the index.

[0759] The controller is further configured to receive a report including UE capability information indicating whether an index of a first time slot among the time slots corresponds to a reference time slot.

[0760] The value of the time slot is determined based on the number of time domain (TD) units and the number of time slots in one of the TD units.

[0761] According to an embodiment, a method performed by a base station (BS) in a wireless communication system is provided. The method includes: identifying configuration information about a channel state information (CSI) report, the configuration information including a set of time slots for which the CSI report is valid, at least one CSI reference resource, and an uplink (UL) time slot, sending the configuration information to a user equipment (UE), and receiving the CSI report from the UE in the UL time slot. The set of time slots includes at least one time slot after a reference time slot of the CSI reference resource.

[0762] The set of time slots corresponds to a time window comprising the time slot with the index.

[0763] The method also includes receiving a report including UE capability information indicating whether an index of a first time slot among the time slots corresponds to a reference time slot.

[0764] A user equipment (UE) includes: a transceiver configured to receive a configuration regarding a channel state information (CSI) report, the configuration including information indicating (i) a set of time slots for which the CSI report is valid, (ii) a CSI reference resource, and (iii) an uplink (UL) time slot n′, and a processor operably coupled to the transceiver and configured to identify the set of time slots and the CSI reference resource based on the configuration, and to determine a CSI report for the identified set of time slots based on the CSI reference resource. The transceiver is further configured to send the CSI report in the UL time slot n′, and the set of time slots includes the time slot n of the CSI reference resource. ref At least one time slot i after that, which means n ref <i.

[0765] The set of time slots includes at least two time slots {n ref , i}, where i∈{n ref +1,...,n′,...,n f}, and n f >n′ is the future time slot.

[0766] Wherein, the set of time slots is composed of time slots with indices [l, ..., l+W CSI -1] CSI time window of time slots, l is W CSI The index of the first time slot, l is taken from the set S, and W CSI ≥1.

[0767] The set S includes the values ​​{n ref , n′, n f}, when l = n ref When the time window includes the time slot index [n ref , n ref +W CSI +1], when l = n′, the time window includes the time slot index [n′, n′+W CSI +1], and when l = n f When the time window includes the time slot index [n f , n f +W CSI +1].

[0768] Among them, when n f = n′+δ, the set S includes the values ​​{n ref , n′+δ}, and the information indicates l=n ref or a value of δ according to a set of values ​​including {0, 1, 2}.

[0769] The transceiver is further configured to report whether the UE can support l=n ref UE capability information of the value.

[0770] Among them, W CSI The value of W is determined CSI =N 4 d, where N 4 is the number of time domain (TD) units, and d is the number of time slots in a TD unit, when N 4 =1 and d = 1, W CSI =1, when N 4 When at least one of and d is greater than 1, W CSI >1, and the information further indicates N according to the set of values ​​including {1, x} and {1, m, p} respectively. 4 and d, where x>1, m is the interval between two consecutive non-periodic non-zero power (NZP) CSI-reference signal (RS) resources from K>1 non-periodic NZP CSI-RS resources configured for CSI reporting, and p is the period of the periodic or semi-persistent NZP CSI-RS resources configured for CSI reporting.

[0771] Among them, when l≥n′, W CSI ≥1, and when l=n ref When W CSI >1.

[0772] A base station (BS) comprising: a processor configured to generate a configuration regarding a channel state information (CSI) report, the configuration comprising information indicating (i) a set of time slots for which the CSI report is valid, (ii) a CSI reference resource, and (iii) an uplink (UL) time slot n′, and a transceiver operably coupled to the processor, the transceiver configured to transmit the configuration, and to receive a CSI report in the UL time slot n′. The CSI report is based on the CSI reference resource and is valid for the set of time slots, and the set of time slots comprises the time slot n of the CSI reference resource. ref At least one time slot i after that, which means n ref <i.

[0773] The set of time slots includes at least two time slots {n ref , i}, where i∈{n ref +1,...,n′,...,n f}, and n f >n′ is the future time slot.

[0774] Wherein, the set of time slots is composed of time slots with indices [l, ..., l+W CSI -1] CSI time window of time slots, l is W CSI The index of the first time slot in the time slot, l is taken from the set S, and W CSI ≥1.

[0775] The set S includes the values ​​{n ref , n′, n f}, when l = n ref When the time window includes the time slot index [n ref , n ref +W CSI +1], when l = n′, the time window includes the time slot index [n′, n′+W CSI +1], and when l = n f When the time window includes the time slot index [n f , n f +W CSI +1].

[0776] Among them, when n f = n′+δ, the set S includes the values ​​{n ref , n′+δ}, and the information also indicates that l=n ref or a value of δ according to a set of values ​​including {0, 1, 2}.

[0777] The transceiver is further configured to receive a signal including an indication of whether the UE can support l=n ref Reporting of UE capability information with the value of .

[0778] Among them, W CSI The value of W is determined CSI =N 4 d, where N 4 is the number of time domain (TD) units, and d is the number of time slots in a TD unit, when N 4 =1 and d = 1, W CSI =1, when N 4 When at least one of and d is greater than 1, W CSI >1, and the information also indicates N according to the set of values ​​including {1, x} and {1, m, p} respectively. 4 and d, where x>1, m is the interval between two consecutive non-periodic non-zero power (NZP) CSI-reference signal (RS) resources from K>1 non-periodic NZP CSI-RS resources configured for CSI reporting, and p is the period of the periodic or semi-persistent NZP CSI-RS resources configured for CSI reporting.

[0779] Among them, when l≥n′, W CSI ≥1, and when l=n ref When W CSI >1,.

[0780] 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 indicating (i) a set of time slots for which the CSI report is valid, (ii) a CSI reference resource, and (iii) an uplink (UL) time slot n′, identifying the set of time slots and the CSI reference resource based on the configuration, determining a CSI report for the identified set of time slots based on the CSI reference resource, and sending the CSI report in the UL time slot n′. The set of time slots includes the time slot n of the CSI reference resource. ref At least one time slot i after that, which means n ref <i.

[0781] The set of time slots includes at least two time slots {n ref , i}, where i∈{n ref +1,...,n′,...,n f}, and n f >n′ is the future time slot.

[0782] Wherein, the set of time slots is composed of time slots with indices [l, ..., l+W CSI -1] CSI time window of time slots, l is W CSI The index of the first time slot in the time slot, l is taken from the set S, and W CSI ≥1.

[0783] The set S includes the values ​​{n ref , n′, n f}, when n f = n′+δ, the set S includes the values ​​{n ref , n′+δ}, and the information indicates l=n ref or the value of δ according to the set of values ​​including {0, 1, 2}, and when W CSI The value of W is determined CSI =N 4 d, where N 4 is the number of time domain (TD) units, and d is the number of time slots in a TD unit, when N 4 =1 and d = 1, W CSI =1, when N 4When at least one of and d is greater than 1, W CSI > 1. The information also indicates that N is a set of values ​​including {1, x} and {1, m, p} respectively. 4 and d, where x>1, m is the interval between two consecutive non-periodic non-zero power (NZP) CSI-reference signal (RS) resources from K>1 non-periodic NZP CSI-RS resources configured for CSI reporting, and p is the period of the periodic or semi-persistent NZP CSI-RS resources configured for CSI reporting.

[0784] Any of the above-described variant embodiments may be used independently or in combination with at least one other variant embodiment.

[0785] The above flow charts illustrate example 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 a different order, or occur multiple times. In another example, a step can be omitted or replaced by another step.

[0786] 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.

[0787] Although the disclosure has been described with exemplary embodiments, various variations and modifications may be conceived by those skilled in the art. The disclosure is intended to include these variations and modifications that fall within the scope of the appended claims. Any description in this application should not be construed as meaning that any particular 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.

Claims

1. A user equipment (UE) in a wireless communication system, the UE comprising: Transceiver; and A controller is coupled to the transceiver and is configured to: receiving configuration information about a channel state information (CSI) report from a base station, the configuration information including a set of time slots for which the CSI report is valid, at least one CSI reference resource, and an uplink (UL) time slot, determining a CSI report for the identified set of time slots based on the configuration information, and Send CSI reports to the base station in the UL time slot, The set of time slots includes at least one time slot after the reference time slot of the CSI reference resource.

2. The UE according to claim 1, wherein: The set of time slots corresponds to a time window comprising the time slot with the index.

3. The UE according to claim 1, wherein: The controller is further configured to report UE capability information indicating whether an index of a first time slot among the time slots corresponds to a reference time slot.

4. The UE according to claim 1, wherein: The value of the time slot is determined based on the number of time domain (TD) units and the number of time slots in one of the TD units.

5. A method performed by a user equipment (UE) in a wireless communication system, the method comprising: receiving configuration information about a channel state information (CSI) report from a base station, the configuration information including a set of time slots for which the CSI report is valid, at least one CSI reference resource, and an uplink (UL) time slot, determining a CSI report for the identified set of time slots based on the configuration information, and Send CSI reports to the base station in the UL time slot, The set of time slots includes at least one time slot after the reference time slot of the CSI reference resource.

6. The method according to claim 5, wherein: The set of time slots corresponds to a time window comprising the time slot with the index.

7. The method according to claim 5, further comprising: UE capability information is reported, the UE capability information indicating whether an index of a first time slot among the time slots corresponds to a reference time slot.

8. The method according to claim 5, wherein: The value of the time slot is determined based on the number of time domain (TD) units and the number of time slots in one of the TD units.

9. A base station (BS) in a wireless communication system, the BS comprising: Transceiver; and A controller is coupled to the transceiver and is configured to: identifying configuration information regarding a channel state information (CSI) report, the configuration information comprising a set of time slots for which the CSI report is valid, at least one CSI reference resource, and an uplink (UL) time slot, sending the configuration information to a user equipment (UE), and receiving a CSI report from the UE in a UL time slot, The set of time slots includes at least one time slot after the reference time slot of the CSI reference resource.

10. The BS according to claim 9, wherein: The set of time slots corresponds to a time window comprising the time slot with the index.

11. The BS according to claim 9, wherein: The controller is further configured to receive a report including UE capability information indicating whether an index of a first time slot among the time slots corresponds to a reference time slot.

12. The BS according to claim 9, wherein: The value of the time slot is determined based on the number of time domain (TD) units and the number of time slots in one of the TD units.

13. A method performed by a base station (BS) in a wireless communication system, the method comprising: identifying configuration information for a channel state information (CSI) report, the configuration information comprising a set of time slots for which the CSI report is valid, at least one CSI reference resource, and an uplink (UL) time slot; sending the configuration information to a user equipment (UE); and receiving a CSI report from the UE in a UL time slot, The set of time slots includes at least one time slot after the reference time slot of the CSI reference resource.

14. The method according to claim 13, wherein: The set of time slots corresponds to a time window comprising the time slot with the index.

15. The method according to claim 13, further comprising: A report including UE capability information is received, the UE capability information indicating whether an index of a first time slot among the time slots corresponds to a reference time slot.

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