Method and apparatus for multiplexing CSI for multi-TRP coherent joint transmission

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method and an apparatus for multiplexing channel state information (CSI) for multiple transmit receive point (TRP) coherent joint transmission in a wireless communication system are provided. The method includes: receiving information on a CSI report associated with Ntrp > = 1 CSI reference signal (CSI-RS) resources, wherein the CSI report includes a CSI portion 1 and a CSI portion 2; and determining, based on the information, a CSI portion 2 comprising a group G1 or G2. An amplitude coefficient indicator and a phase coefficient indicator are included in G1 or G2 based on a priority value # imgabs0 #. The method also includes transmitting the CSI part 1 and the determined CSI part 2.

Description

Technical Field

[0001] The present disclosure generally relates to wireless communication systems, and more specifically, to multiplexing channel status information (CSI) in wireless communication systems for coherent joint transmission of multiple transmission reception points (TRPs). Background Art

[0002] The 5th generation (5G) or new radio (NR) mobile communications are gathering more and more momentum recently with all the global technical activities on various candidate technologies from industry and academia. Candidate enablers for 5G / NR mobile communications include: massive antenna technology from traditional cellular bands to high frequencies to provide beamforming (BF) gain and support more and more capacity; new waveforms (e.g., new radio access technology (RAT)) to flexibly accommodate various services / applications with different requirements; new multiple access schemes to support large-scale connections; and so on.

[0003] 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 including 28 GHz and 39 GHz. In addition, 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 mobile communication technology, the implementation of 6G mobile communication technology (called a super 5G system) in the terahertz (THz) frequency band (e.g., 95 GHz to 3 THz frequency band) has been considered.

[0004] In the early stages of 5G mobile communication technology development, in order to support services and meet performance requirements associated with enhanced Mobile BroadBand (eMBB), Ultra Reliable Low Latency Communications (URLLC) and massive Machine-Type Communications (mMTC), standardization is underway on the following items: beamforming and massive MIMO, used to mitigate radio wave path loss and increase radio wave transmission distance in millimeter waves; support parameter sets (e.g., operating multiple subcarrier spacings) for efficient use of millimeter wave resources and dynamic operation of time slot formats; initial access technology to support 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 amounts of data transmission and polarization codes for highly reliable transmission of control information; L2 preprocessing; and network slicing to provide dedicated networks dedicated to specific services.

[0005] Currently, in view of the services that 5G mobile communication technology will support, discussions are underway on improvements and performance enhancements of initial 5G mobile communication technology, and there is physical layer standardization on technologies such as the following: 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 compliance with various regulatory requirements in unlicensed frequency bands; NR UE energy saving; Non-Terrestrial Network (NTN), which is UE-satellite direct communication for providing coverage in areas where communication with terrestrial networks is unavailable; and positioning.

[0006] In addition, in terms of air interface architecture / protocol, standardization is already underway on technologies such as: Industrial Internet of Things (IIoT), which is used to support new services through intercommunication and integration with other industries; IAB (Integrated Access and Backhaul), which is used to provide nodes for network service area expansion by supporting wireless backhaul links and access links in an integrated manner; mobility enhancement, including conditional switching and DAPS (Dual Active Protocol Stack) switching; and two-step random access, which is used to simplify the random access procedure (2-step RACH (Random Access Channel) for NR). In terms of system architecture / services, standardization is also underway on the following: 5G baseline architecture (e.g., service-based architecture or service-based interface), which is used to combine network function virtualization (NFV) and software-defined networking (SDN) technologies; and Mobile Edge Computing (MEC), which is used to receive services based on UE location.

[0007] With the commercialization of 5G mobile communication systems, the already exponentially increasing number of connected devices will be connected to the communication network, and accordingly, it is expected that enhanced functions and performance of 5G mobile communication systems and integrated operations of connected devices will be necessary. To this end, new research related to the following items is planned: extended reality (eXtended Reality, XR) for effectively supporting AR (Augmented Reality), VR (Virtual Reality), MR (MixedReality), etc.; improving 5G performance and reducing complexity by utilizing artificial intelligence (Artificial Intelligence, AI) and machine learning (Machine Learning, ML); AI service support; metaverse service support; and drone communication.

[0008] In addition, such developments in 5G mobile communication systems will serve not only as a basis for developing new waveforms for providing coverage of 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 technology using OAM (Orbital Angular Momentum), and RIS (Reconfigurable Intelligent Surface), but also as a basis for developing full-duplex technology for improving the frequency efficiency of 6G mobile communication technology and improving system networks, AI-based communication technology for implementing system optimization by utilizing satellites and AI (artificial intelligence) from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technology for implementing services with a level of complexity that exceeds the limits of UE operating capabilities by utilizing ultra-high performance communication and computing resources.

[0009] The above information is presented as background information only to assist in understanding the present disclosure. No determination has been made, and no assertion has been made, as to whether any of the above may be applicable to the present disclosure as prior art. Summary of the invention

[0010] Technical issues

[0011] The present disclosure relates to wireless communication systems, and more specifically, to multiplexing CSI in wireless communication systems for coherent joint transmission of multiple TRPs.

[0012] Solution to the problem

[0013] In one embodiment, a user equipment (UE) is provided. The UE includes a transceiver configured to: receive information about a trp ≥1 channel state information (CSI) reference signal (CSI-reference signal, CSI-RS) resources associated with a CSI report, wherein the CSI report includes CSI part 1 and CSI part 2. The UE also includes a processor operably coupled to the transceiver. Based on the information, the processor is configured to determine whether the CSI part 2 includes group G1 or G2. Based on the priority value Include the amplitude coefficient indicator and the phase coefficient indicator in G1 or G2. Here, π(f) is the permutation function, L ris the number of spatial domain (SD) basis vectors associated with CSI-RS resource r, and φ(n) is the mapping of index n∈{1,...,N} to CSI-RS resource index r∈{1,...,N}. trp}, v is the number of layers, l = 1, 2, ..., v, i = 0, 1, ..., 2L r -1, f = 0, 1, ..., M v -1, Mv is the number of frequency domain (FD) basis vectors, and 1≤N≤N trp The transceiver is further configured to transmit CSI part 1 and the determined CSI part 2.

[0014] In another embodiment, a base station (BS) is provided. The BS includes a transceiver configured to: send information about a trp ≥1 CSI reference signal (CSI-RS) resource associated with a CSI report, wherein the CSI report includes CSI part 1 and CSI part 2; and receiving CSI part 1 and CSI part 2. CSI part 2 includes group G1 or G2. Based on the priority value The amplitude coefficient indicator and the phase coefficient indicator are included in G1 or G2.

[0015] In yet another embodiment, a method performed by a UE is provided. The method includes: receiving information about an N trp ≥1 CSI-RS resource associated with the CSI report, wherein the CSI report includes CSI part 1 and CSI part 2; and based on the information, determining CSI part 2 including group G1 or G2. Based on the priority value The amplitude coefficient indicator and the phase coefficient indicator are included in G1 or G2. The method also includes transmitting CSI part 1 and the determined CSI part 2.

[0016] Other technical features will be clear to those skilled in the art from the following drawings, description and claims.

[0017] Before carrying out the following detailed description, it may be advantageous to set forth the definitions of certain words and phrases used throughout this patent document.The term "coupling" and its derivatives refer to any direct or indirect communication between two or more elements, regardless of whether these elements are in physical contact with each other.The terms "send", "receive" and "communication" and their derivatives cover both direct communication 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 mean including, included in, interconnected with, included in, connected to, connected to, coupled to, coupled to, can communicate with, collaborate with, interlace, juxtapose, approach, be bound to, bound to, have, have the property of, have a relationship with, etc.The term "controller" means 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 function associated with any particular controller can be centralized or distributed, whether local or remote. The phrase "at least one of" when used with a list of items means that different combinations of one or more of the listed items can be used, and that only one of the items in the list may be required. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C.

[0018] 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 with suitable computer-readable program codes. 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 do 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 rewrite it later (such as rewritable optical discs or erasable storage devices).

[0019] Definitions for other specific words and phrases are also 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.

[0020] Advantageous Effects of the Invention

[0021] The present disclosure can provide CSI multiplexing in a wireless communication system for multi-TRP coherent joint transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description in conjunction with the accompanying drawings, in which like reference numerals represent like parts:

[0023] Figure 1 An example of a wireless network according to an embodiment of the present disclosure is shown;

[0024] Figure 2 An example of a gNB according to an embodiment of the present disclosure is shown;

[0025] Figure 3 An example of a UE according to an embodiment of the present disclosure is shown;

[0026] Figure 4 An example of a wireless transmission path according to the present disclosure is shown;

[0027] Figure 5 An example of a wireless receive path according to the present disclosure is shown;

[0028] Figure 6 An example of an antenna structure according to an embodiment of the present disclosure is shown;

[0029] Figure 7 An example of distributed MIMO according to an embodiment of the present disclosure is shown;

[0030] Figure 8 An example of distributed MIMO according to an embodiment of the present disclosure is shown;

[0031] Fig. 9 An example of an antenna port layout according to an embodiment of the present disclosure is shown;

[0032] Fig.10 An example of a 3D grid of DFT (discrete Fourier transform) vectors according to an embodiment of the present disclosure is shown;

[0033] Fig.11 An example of a codebook according to an embodiment of the present disclosure is shown;

[0034] Fig.12 An example of UCI (UL control information) for multiplexing and reporting CSI according to an embodiment of the present disclosure is shown; and

[0035] Fig.13 An example flow chart of a process performed by a UE according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0036] Discussed below Figures 1 to 13 The various embodiments used to describe the principles of the present disclosure in this patent document are exemplary only and should not be interpreted in any way as limiting 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.

[0037] The following documents are hereby incorporated by reference into the present disclosure as if fully set forth herein: 3GPP TS 36.211 v17.2.0, "E-UTRA, Physical channels and modulation"; 3GPP TS 36.212 v17.2.0, "E-UTRA, Multiplexing and Channel coding"; 3GPP TS 36.213 v17.2.0, "E-UTRA, Physical Layer Procedures"; 3GPP TS 36.321 v17.1.0, "E-UTRA, Medium Access Control (MAC) protocol specification"; 3GPP TS 36.331 v17.1.0, "E-UTRA, Radio Resource Control (RRC) Protocol Specification"; 3GPP TS 38.211 v17.2.0, "NR, Physical channels and modulation"; 3GPP TS 38.212v17.2.0, "NR,Multiplexing andChannel coding"; 3GPP TS 38.213v17.2.0, "NR, Physical Layer Procedures for Control"; 3GPP TS 38.214v17.2.0, "NR, Physical Layer Procedures for Data"; 3GPPTS 38.215v17.1.0, "NR, Physical Layer Measurements"; 3GPP TS 38.321v17.1.0, "NR, Medium Access Control (MAC) protocol specification"; and 3GPP TS 38.331v17.1.0, "NR, Radio Resource Control (RRC) Protocol Specification".

[0038] In order to meet the increased demand for wireless data traffic since the deployment of 4G communication systems, and to realize various vertical applications, 5G / NR communication systems have been developed and are currently being deployed. 5G / NR communication systems are considered to be implemented in higher frequency (millimeter wave) bands (e.g., 28 GHz or 60 GHz bands) to achieve higher data rates, or in lower frequency bands (such as 6 GHz) to achieve robust coverage and mobility support. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technology are discussed in 5G / NR communication systems.

[0039] In addition, in the 5G / NR communication system, development of system network improvements is underway based on advanced small cells, cloud radio access network (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, collaborative communications, coordinated multi-points (CoMP), receiving-end interference cancellation, etc.

[0040] 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 deployments that may use terahertz (THz) frequency bands.

[0041] The following Figure 1-Figure 3 Various embodiments are described for implementation in wireless communication systems 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.

[0042] 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.

[0043] like Figure 1 As shown, the wireless network includes gNB 101 (e.g., base station BS), gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one network 130 (such as the Internet, a proprietary Internet Protocol (IP) network, or other data network).

[0044] gNB 102 provides wireless broadband access to network 130 for a first plurality of user equipments (UEs) 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 (HS); 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.

[0045] Depending on the type of network, the term "base station" or "BS" may refer to any component (or set of components) configured to provide wireless access to a network, such as a transmit point (TP), a transmit-receive 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 wireless-enabled devices. The base station may provide wireless access according to one or more wireless communication protocols, for example, 5G / NR 3rd 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 device." 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 a smart phone) or a generally considered fixed device (such as a desktop computer or a vending machine).

[0046] The dashed lines illustrate the approximate extents of coverage areas 120 and 125, which are shown as generally circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with 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.

[0047] As described in more detail below, one or more of the UEs 111-116 include circuitry, programming, or a combination thereof for multiplexing CSI for coherent joint transmission of multiple TRPs in a wireless communication system. In certain embodiments, one or more of the gNBs 101-103 include circuitry, programming, or a combination thereof for supporting multiplexing CSI for coherent joint transmission of multiple TRPs in a wireless communication system.

[0048] although Figure 1 An example of a wireless network is shown, but it is also possible to Figure 1Various 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 of gNBs 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.

[0049] 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 gNB 101 and gNB 103 may have the same or similar configuration. However, gNBs have various configurations, and Figure 2 The scope of the present disclosure is not limited to any particular implementation of the gNB.

[0050] 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 (IF) 235.

[0051] 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.

[0052] Transmit (TX) processing circuitry in the transceivers 210a-210n and / or the controller / processor 225 receives analog or digital data (such as voice data, web data, email, or interactive video game data) from the controller / processor 225. The TX processing circuitry encodes, multiplexes, and / or digitizes the outgoing baseband data to generate processed baseband or IF signals. The transceivers 210a-210n up-convert the baseband or IF signals to RF signals that are transmitted via the antennas 205a-205n.

[0053] 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 in accordance with well-known principles. The controller / processor 225 may also support additional functionality, such as more advanced wireless communication functionality. For example, the controller / processor 225 may support beamforming or directional routing operations, in which outgoing / incoming signals from / to multiple antennas 205a-205n are weighted differently to effectively direct the outgoing signals in a desired direction. The controller / processor 225 may support any of a variety of other functions in the gNB 102.

[0054] The controller / processor 225 is also capable of executing programs and other processes residing in the memory 230, such as processes to support multiplexing of CSI for coherent joint transmission of multiple TRPs in a wireless communication system. The controller / processor 225 can move data into or out of the memory 230 as required by the executed process.

[0055] 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 via a 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 an Ethernet transceiver or transceivers.

[0056] Memory 230 is coupled to controller / processor 225. A portion of memory 230 may include RAM, while another portion of memory 230 may include flash memory or other ROM.

[0057] although Figure 2 An example of a gNB 102 is shown, but the Figure 2 For example, gNB 102 may include any number of Figure 2 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.

[0058] 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 the UE.

[0059] 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.

[0060] 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 to processor 340 for processing (such as for web browsing data).

[0061] The TX processing circuitry in the transceiver 310 and / or processor 340 receives analog or digital voice data from the microphone 320, or receives other outgoing baseband data (such as web data, email, or interactive video game data) from the processor 340. The TX processing circuitry encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The transceiver 310 up-converts the baseband or IF signal to an RF signal that is transmitted via the antenna 305.

[0062] The processor 340 may include one or more processors or other processing devices and executes 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 UL signals and the transmission of DL channel signals through the transceiver 310. In some embodiments, the processor 340 includes at least one microprocessor or microcontroller.

[0063] The processor 340 is also capable of executing other processes and programs residing in the memory 360, such as a process for multiplexing CSI for multi-TRP coherent joint transmission in a wireless communication system.

[0064] Processor 340 can move data into or out of memory 360 as needed by the executing process. In some embodiments, processor 340 is configured to execute application 362 based on OS 361 or in response to signals received from a gNB or operator. Processor 340 is also coupled to I / O interface 345, which provides UE 116 with the ability to connect to other devices such as laptops and handheld computers. I / O interface 345 is the communication path between these accessories and processor 340.

[0065] Processor 340 is also coupled to input 350 including, for example, a touch screen, a keypad, etc., and display 355. An operator of UE 116 may enter data into UE 116 using input 350. 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 limited graphics from a website).

[0066] Memory 360 is coupled to processor 340. A portion of memory 360 may include random access memory (RAM), while another portion of memory 360 may include flash memory or other read-only memory (ROM).

[0067] 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 also be configured to operate as other types of mobile or stationary devices.

[0068] Figure 4 and Figure 5An example of a wireless transmit path and a wireless receive path according to the present disclosure is shown. In the following description, the transmit path 400 may be described as being implemented in a gNB (such as gNB 102) and the receive path 500 may be described as being implemented in a UE (such as UE 116). However, it is understood that the receive path 500 may be implemented in a gNB and the transmit path 400 may be implemented in a UE. In some embodiments, the transmit path 400 is configured to support multiplexing of CSI for multi-TRP coherent joint transmission in a wireless communication system.

[0069] like Figure 4 The transmission path 400 shown includes a channel coding and modulation block 405, a serial-to-parallel conversion (S-to-P) block 410, an inverse fast Fourier transform (IFFT) block of size N 415, a parallel-to-serial conversion (P-to-S) block 420, a cyclic prefix addition block 425, and an up-converter (UC) 430. Figure 5 The receiving path 500 shown includes a down-converter (DC) 555, a cyclic prefix removal block 560, a serial-to-parallel conversion (S-to-P) block 565, a size N fast Fourier transform (FFT) block 570, a parallel-to-serial conversion (P-to-S) block 575, and a channel decoding and demodulation block 580.

[0070] like Figure 4 As shown, the channel coding and modulation block 405 receives a set of information bits, applies coding (such as low-density parity check (LDPC) coding), and modulates the input bits (such as using quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) to generate a frequency-domain modulation symbol sequence.

[0071] The serial-to-parallel conversion 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 gNB 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 conversion 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 to 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.

[0072] The RF signal transmitted from gNB 102 reaches UE 116 after passing through the wireless channel, and an operation opposite to that at gNB 102 is performed at UE 116.

[0073] 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 conversion 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 conversion 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.

[0074] Each of gNBs 101-103 may implement a similar method to that for transmitting in the downlink to UEs 111-116. Figure 4 The transmission path 400 is shown, and similar to the reception from UE 111-116 in the uplink may be implemented as shown in FIG. Figure 5 Receive path 500 is shown. Similarly, each of UEs 111-116 can implement transmit path 400 for transmitting to gNBs 101-103 in the uplink, and can implement receive path 500 for receiving from gNBs 101-103 in the downlink.

[0075] Figure 4 and Figure 5 Each component in may be implemented using hardware only or a combination of hardware and software / firmware. As a specific example, Figure 4 and Figure 5At 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, wherein the value of size N can be modified according to the implementation.

[0076] In addition, although described as using FFT and IFFT, this is only illustrative and cannot be interpreted as limiting the scope of the present disclosure. Other types of transforms can be used, such as discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT) functions. It can be understood that for DFT function and IDFT function, the value of variable N can be any integer (such as 1, 2, 3, 4, etc.), and for FFT function and IFFT function, the value of variable N can be any integer as a power of 2 (such as 1, 2, 4, 8, 16, etc.).

[0077] although Figure 4 and Figure 5 An example of a wireless transmission path and a wireless reception path is shown, but the wireless transmission path and the wireless reception path may also be Figure 4 and Figure 5 Make various changes. For example, Figure 4 and Figure 5 The various components in may be combined, further subdivided, or omitted, and additional components may be added according to specific needs. Figure 4 and Figure 5 It is intended to illustrate examples of the types of transmit paths 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.

[0078] The unit used for DL ​​signaling or UL signaling on a cell is called a time slot and may include one or more symbols. The bandwidth (BW) unit is called a resource block (RB). An RB includes multiple sub-carriers (SC). For example, a time slot may have a duration of 1 millisecond, an RB may have a bandwidth of 180KHz, and include 12 SCs with an inter-SC spacing of 15KHz. A time slot may be a full DL time slot or a full UL time slot or a mixed time slot similar to a special subframe in a time division duplex (TDD) system.

[0079] DL signals include data signals conveying information content, control signals conveying DL control information (DCI), and reference signals (RS) also known as pilot signals. The gNB transmits data information or DCI through the corresponding physical DL shared channel (PDSCH) or physical DL control channel (PDCCH). PDSCH or PDCCH can be transmitted on a variable number of time slot symbols including one time slot symbol. The spatial setting for PDCCH reception can be indicated to the UE based on the configuration of the TCI state value of the CORESET (control resource set) in which the UE receives the PDCCH. The spatial setting for PDSCH reception can be indicated to the UE based on the configuration of a higher layer or based on the indication of the TCI state value of the DCI format received by the scheduling PDSCH. The gNB can configure the UE to receive signals on the cell within the DL bandwidth part (BWP) of the cell DL BW.

[0080] The gNB transmits one or more of multiple types of RS, including channel state information RS (CSI-RS) and demodulation RS (DMRS). CSI-RS is primarily intended for UEs to perform measurements and provide channel state information (CSI) to the gNB. For channel measurements, non-zero power CSI-RS (NZP CSI-RS) resources are used. For interference measurement reports (IMRs), CSI interference measurement (CSI-IM) resources associated with zero power CSI-RS (ZP CSI-RS) configurations are used. The CSI process includes NZP CSI-RS resources and CSI-IM resources. The UE can determine the CSI-RS transmission parameters through DL control signaling or higher layer signaling (such as RRC signaling from the gNB). The transmission instance of the CSI-RS can be indicated by DL control signaling or configured by higher layer signaling. DMRS is transmitted only in the BW of the corresponding PDCCH or PDSCH, and the UE can use DMRS to demodulate data or control information.

[0081] UL signals also include data signals conveying information content, control signals conveying UL control information (UCI), DMRS associated with data or UCI demodulation, sounding RS (SRS) that enables the gNB to perform UL channel measurement, and random access (RA) preambles that enable the UE to perform random access. The UE sends data information or UCI through the corresponding physical UL shared channel (PUSCH) or physical UL control channel (PUCCH). PUSCH or PUCCH can be sent on a variable number of time slot symbols including one time slot symbol. The gNB can configure the UE to send signals on a cell within the UL BWP of the cell UL BW.

[0082] UCI includes: hybrid automatic repeat request acknowledgement (HARQ-ACK) information, which indicates correct or incorrect detection of a data transmission block (TB) in the PDSCH; scheduling request (SR), which indicates whether the UE has data in the UE's buffer; and CSI report, which enables the gNB to select appropriate parameters for PDSCH or PDCCH transmission to the UE. HARQ-ACK information can be configured with a smaller granularity than per TB and can be per data code block (CB) or per data CB group, where one data TB includes multiple data CBs.

[0083] The CSI report from the UE may include: a channel quality indicator (CQI), which informs the gNB of the maximum modulation and coding scheme (MCS) for the UE to detect a data TB with a predetermined block error rate (BLER), such as a BLER of 10%; a precoding matrix indicator (PMI), which informs the gNB how to combine signals from multiple transmitter antennas according to the MIMO transmission principle; and a rank indicator (RI), which indicates the transmission rank of the PDSCH. UL RS includes DMRS and SRS. DMRS is transmitted only in the BW of the corresponding PUSCH or PUCCH transmission. The gNB can use DMRS to demodulate the information in the corresponding PUSCH or PUCCH. SRS is sent by the UE to provide UL CSI to the gNB, and for TDD systems, SRS transmission can also provide PMI for DL ​​transmission. In addition, in order to establish synchronization or initial higher layer connection with the gNB, the UE can send a physical random access channel.

[0084] In the present disclosure, a beam is determined by any of the following: (1) TCI state, which establishes a quasi-colocation (QCL) relationship between a source reference signal (e.g., synchronization signal / physical broadcasting channel (PBCH) block (SSB) and / or CSI-RS) and a target reference signal; or (2) spatial relationship information, which establishes an association with a source reference signal (such as SSB or CSI-RS or SRS). In either case, the ID of the source reference signal identifies the beam.

[0085] The TCI state and / or the spatial relation reference RS may determine a spatial Rx filter for receiving a downlink channel at the UE, or a spatial Tx filter for transmitting an uplink channel from the UE.

[0086] Rel.14 LTE and Rel.15 NR support up to 32 CSI-RS antenna ports, which enables the eNB 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 mmWave bands, although the number of antenna elements may be larger for a given form factor, the number of CSI-RS ports (which may correspond to the number of digitally precoded ports) tends to be larger due to Figure 6The illustrated hardware constraints, such as the feasibility of installing a large number of ADCs / DACs at mmWave frequencies, are limited.

[0087] Figure 6 An example antenna structure 600 is shown in accordance with an embodiment of the present disclosure. Figure 6 The illustrated embodiment of antenna structure 600 is for illustration only.

[0088] In this case, one CSI-RS port is mapped to a large number of antenna elements that can be controlled by a set of analog phase shifters 601. One CSI-RS port can then correspond to one subarray that produces a narrow analog beam through analog beamforming 605. The analog beam can be configured to sweep across a wider angular range 620 by changing the phase shifter set across symbols or subframes. The number of subarrays (equal to the number of RF chains) is proportional to the number of CSI-RS ports N. CSI-PORT The digital beamforming unit 610 spans N CSI-PORT The analog beams are linearly combined to further increase the precoding gain. While the analog beams are broadband (and therefore not frequency selective), the digital precoding can also vary across frequency subbands or resource blocks. Receiver operation can be similarly envisioned.

[0089] Since the aforementioned system utilizes multiple simulated beams for transmission and reception (wherein one or a small number of simulated beams are selected from a large number of simulated beams—to be performed from time to time, for example, after a training duration), the term "multi-beam operation" is used to refer to the overall system aspect. For the purpose of explanation, this includes indicating the assigned DL or UL TX beam (also referred to as "beam indication"), measuring at least one reference signal for calculating and performing beam reporting (also referred to as "beam measurement" and "beam reporting", respectively), and receiving DL or UL transmissions via selecting the corresponding RX beam.

[0090] The foregoing system is also applicable to higher frequency bands such as >52.6 GHz. In this case, the system can use only analog beams. Due to the O2 absorption loss near 60 GHz frequency (about 10 dB additional loss at 100 m distance), more sharper analog beams (and therefore more radiators in the array) may be needed to compensate for the additional path loss.

[0091] For cellular systems operating in the sub-1 GHz frequency range (e.g., less than 1 GHz), it is challenging to support a large number of CSI-RS antenna ports (e.g., 32) at a single location or remote radio head (RRH) or TRP due to the larger antenna form factor size required at these frequencies compared to systems operating at higher frequencies (such as 2 GHz or 4 GHz). At such low frequencies, the maximum number of CSI-RS antenna ports that can be co-located at a single site (or TRP / RRH) may be limited to, for example, 8. This limits the spectral efficiency of such a system. In particular, the MU-MIMO spatial multiplexing gain provided by a large number of CSI-RS antenna ports (such as 32) cannot be achieved.

[0092] One way to operate a sub-1 GHz system with a large number of CSI-RS antenna ports is based on distributing the antenna ports at multiple locations (or TRPs / RRHs). Multiple sites or TRPs / RRHs can still be connected to a single (common) base unit, so the signals sent / received via multiple distributed TRPs / RRHs can still be processed at a centralized location. This is called distributed MIMO or multi-TRP coherent joint transmission (C-JT).

[0093] The present disclosure provides a two-part CSI or UCI framework for multi-TRP C-JT scenarios, and proposes a method and apparatus for grouping part 1 and part 2 CSI reports in multi-TRP scenarios.

[0094] The present disclosure relates to electronic devices and methods regarding CSI reporting for MIMO operations, and more particularly, to electronic devices and methods regarding two-part UCI for distributed MIMO or multi-TRP operations in wireless networks.

[0095] The CSI enhancement described in Rel-18 MIMO considers the refinement of the Rel-16 / 17 type IICSI codebook to support mTRP coherent joint transmission (C-JT) operation by considering the trade-off between performance and overhead. The Rel-16 / 17 type IICSI codebook has three components W 1 , W 2 and W f, and the Rel-18 type IICSI codebook for CJT has been developed based on the Rel-16 / 17 type IICSI codebook associated with multiple CSI-RS resources (multiple TRPs). Therefore, CSI includes elements associated with multiple TRPs (or CSI-RS resources), so the traditional framework of two-part CSI or two-part UCI needs to be enhanced to customize more efficient CSI reporting for the Rel-18 type IICSI framework.

[0096] In the present disclosure, for a multi-TRP C-JT scenario, a component for splitting a group to design a two-part CSI or a two-part UCI is provided.

[0097] Although the focus of the present disclosure is on 3GPP 5G NR communication systems, various embodiments may generally also be applied to UEs operating using other RATs and / or standards, such as different versions / generations of 3GPP standards (including super 5G, 6G, etc.), IEEE standards (such as 802.16 WiMAX and 802.11 Wi-Fi), etc.

[0098] Rel.14 LTE and Rel.15 NR support up to 32 CSI-RS antenna ports, which enables the eNB 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 mmWave bands, although the number of antenna elements may be larger for a given form factor, the number of CSI-RS ports (which may correspond to the number of digitally precoded ports) tends to be larger due to Figure 6 The illustrated hardware constraints, such as the feasibility of installing a large number of ADCs / DACs at mmWave frequencies, are limited.

[0099] On the other hand, in lower frequency bands such as <1 GHz, the number of antenna elements may not be many at a given form factor due to the large wavelength. As an example, for the case of a wavelength size λ (which is 50 cm) at a center frequency of 600 MHz, for a uniform-linear-array (ULA) antenna panel of 16 antenna elements, the expected half-wavelength distance between two adjacent antenna elements is 4 m. Considering that in practical cases multiple antenna elements are mapped to one digital port, the expected size of the antenna panel at the gNB to support a large number of antenna ports (such as 32 CSI-RS ports) becomes very large in such low frequency bands, and this leads to difficulties in deploying 2D antenna element arrays within the size of conventional form factors. This leads to a limited number of CSI-RS ports that can be supported at a single site and limits the spectral efficiency of such systems.

[0100] One possible way to solve this problem is to form multiple TRPs (multi-TRPs) or RRHs with a small number of antenna ports, instead of integrating all antenna ports in a single panel (or a single site), and distribute multiple panels in multiple locations / sites (or TRPs, RRHs). This distributed MIMO (D-MIMO) method concept is as follows Figure 7 shown.

[0101] Figure 7 and Figure 8 Examples of distributed MIMO 700 and 800 are shown according to embodiments of the present disclosure. Figure 8 The illustrated embodiments of distributed MIMO 700 and 800 are for illustration only.

[0102] Multiple TRPs at multiple locations can still be connected to a single base unit, so signals sent / received via multiple distributed TRPs can be processed in a centralized manner by a single base unit, such as Figure 8 shown.

[0103] Note that although low-band (bands below 1 GHz) systems are provided as the motivation for distributed MIMO (or mTRP), distributed MIMO technology is band agnostic and is also useful in mid-band (below 6 GHz) systems and high-band (above 6 GHz) systems in addition to low-band (below 1 GHz) systems.

[0104] The term “distributed MIMO” is used for illustrative purposes and it may be considered under another term such as multi-TRP, mTRP, cellular-free network, etc.

[0105] All the following components and embodiments are applicable to UL transmission using CP-OFDM (cyclic prefix OFDM) waveform, DFT-SOFDM (DFT-spread OFDM) waveform, and SC-FDMA (single-carrier FDMA) waveform. In addition, all the following components and embodiments are applicable to UL transmission when the time scheduling unit is a subframe (which may be composed of one or more time slots) or a time slot.

[0106] 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.

[0107] The subband used for CSI reporting is defined as a set of contiguous PRBs representing the smallest frequency unit for CSI reporting. The number of PRBs in a subband can be fixed for a given DL system bandwidth value, or can be semi-statically configured via higher layer / RRC signaling, or dynamically configured via L1 DL control signaling or MAC control element (MAC CE (ControlElement)). The number of PRBs in a subband can be included in the CSI reporting settings.

[0108] "CSI reporting band" is defined as a set / series of contiguous or non-contiguous subbands where CSI reporting is performed. For example, the CSI reporting band may include all subbands within the DL system bandwidth. This may also be referred to as "full band". Alternatively, the CSI reporting band may include only a set of subbands within the DL system bandwidth. This may also be referred to as "partial band".

[0109] The term "CSI reporting band" is used only as an example to indicate the functionality. Other terms such as "CSI reporting subband set" or "CSI reporting bandwidth" or bandwidth part (BWP) may also be used.

[0110] In terms of UE configuration, the UE may be configured with at least one CSI reporting band. The configuration may be semi-static (via higher layer signaling or RRC) or dynamic (via MAC CE or L1 DL control signaling). When multiple (N) CSI reporting bands are configured (e.g., via RRC signaling), the UE may report CSI associated with n≤N CSI reporting bands. For example, a large system bandwidth >6 GHz may desire multiple CSI reporting bands. The value of n may be configured semi-statically (via higher 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.

[0111] Therefore, the CSI parameter frequency granularity can be defined for each CSI reporting band as follows. n When there are M subbands, n For a CSI reporting band with 4 subbands, the CSI parameters are configured using a “single” report. n When one CSI parameter is reported for each subband in M n The CSI reporting frequency band is divided into subbands, and the CSI parameters are configured by "subband".

[0112] Fig. 9 An example of an antenna port layout 900 according to an embodiment of the present disclosure is shown. Fig. 9 The illustrated embodiment of antenna port layout 900 is for illustration only.

[0113] In the following, it can be assumed that 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, there can be N 1 >1, N 2 >1, while for 1D antenna port layout, there can be N 1 >1 and N 2 = 1. Therefore, for the dual-polarized antenna port layout, when each antenna is mapped to one antenna port, the total number of antenna ports is 2N 1 N 2 . Fig. 9 The figure shows an illustration where "X" represents two antenna polarizations. In this disclosure, the term "polarization" refers to a set 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, X is the starting antenna port number (e.g., X=3000, the subsequent antenna ports are 3000, 3001, 3002, ...). Let N g is the number of antenna panels at the gNB. g >1), it can be assumed that each panel has N 1 ports and N 2 The dual-polarized antenna port has 2 ports. Fig. 9 Note that the antenna port layouts may be the same or different in different antenna panels.

[0114] In one example, the antenna architecture of a D-MIMO or CJT (coherent joint transmission) system is structured. For example, the antenna structure at each RRH (or TRP) is dual-polarized (eg Fig. 9 The antenna structure at each RRH / TRP may be the same. Or the antenna structure at one RRH / TRP may be different from the antenna structure at another RRH / TRP. Likewise, the number of ports at each RRH / TRP may be the same. Or the number of ports at one RRH / TRP may be different from the number of ports at another RRH / TRP. In one example, N g =N RRH , which is the number of RRH / TRP in D-MIMO transmission.

[0115] In another example, the antenna architecture of a D-MIMO or CJT system is unstructured. For example, the antenna structure at one RRH / TRP may be different from the antenna structure at another RRH / TRP.

[0116] In the rest of this disclosure, a structured antenna architecture may be assumed. For simplicity, it may be assumed that each RRH / TRP is equivalent to a panel (see Fig. 9 ), although in reality one RRH / TRP may have multiple panels. However, the present disclosure is not limited to the assumption of a single panel at each RRH / TRP, and can be easily extended to (cover) the case when the RRH / TRP has multiple antenna panels.

[0117] In one embodiment, the RRH constitutes (or corresponds to or is equivalent to or is associated with) at least one of the following examples.

[0118] In one example, the RRH corresponds to the TRP.

[0119] In one example, the RRH or TRP corresponds to the CSI-RS resource. The UE is configured with K=N RRH =(N TRP )>1 NZP non-zero power (CSI-RS) resource, and the CSI report is configured to span multiple CSI-RS resources. This is similar to the Class B K>1 configuration in Rel.14 LTE. The K NZP CSI-RS resources may belong to one CSI-RS resource set or multiple CSI-RS resource sets (e.g., the K resource sets each include one CSI-RS resource). The details are as explained earlier in this disclosure.

[0120] In one example, an RRH or TRP corresponds to a CSI-RS resource group, where a group includes one or more NZP CSI-RS resources. The UE is configured with K ≥ N RRH >1 non-zero power (NZP) CSI-RS resource, and the CSI report is configured to span multiple CSI-RS resources from the resource group. This is similar to the Class B K>1 configuration in Rel.14 LTE. The K NZP CSI-RS resources may belong to one CSI-RS resource set or multiple CSI-RS resource sets (e.g., the K resource sets each include one CSI-RS resource). The details are as explained earlier in this disclosure. In particular, the K CSI-RS resources may be split into N RRH The information about resource grouping may be provided together with the CSI-RS resource setting / configuration, or provided together with the CSI report setting / configuration, or provided together with the CSI-RS resource configuration.

[0121] In one example, the RRH or TRP corresponds to a CSI-RS port subset (or group). The UE is configured with at least one NZP CSI-RS resource including (or associated with) a CSI-RS port, which can be grouped (or split) into multiple antenna port subsets / groups / parts, each antenna port subset / group / part corresponding to (or constituting) an RRH / TRP. Information about port subsets or port groupings can be provided together with the CSI-RS resource setting / configuration, or provided together with the CSI report setting / configuration, or provided together with the CSI-RS resource configuration.

[0122] In one example, the RRH or TRP corresponds to an example disclosed in the present disclosure that depends on the configuration. For example, the configuration can be explicit via parameters (e.g., RRC parameters). Or the configuration can be implicit.

[0123] In one example, when implicit, it can be based on the value of K. For example, when K>1 CSI-RS resource, the RRH corresponds to the example provided in this disclosure, and when K=1 CSI-RS resource, the RRH corresponds to the example provided in this disclosure.

[0124] In another example, the configuration may be based on a configured codebook. For example, when the codebook corresponds to a decoupled codebook (modular or separate codebook for each RRH), the RRH corresponds to a CSI-RS resource (e.g., an example provided in the present disclosure) or a resource group (e.g., an example provided in the present disclosure), and when the codebook corresponds to a coupled (joint or coherent) codebook (a joint codebook across TRP / RRHs), the RRH corresponds to a CSI-RS port subset (or group) (e.g., an example provided in the present disclosure).

[0125] In one example, when an RRH or TRP is mapped to (or corresponds to) a CSI-RS resource or resource group (e.g., an example provided in the present disclosure), and the UE can select a subset of TRPs / RRHs (resources or resource groups) and report CSI for the selected TRPs / RRHs (resources or resource groups), the selected TRPs / RRHs can be reported via an indicator. For example, the indicator can be a CRI or a PMI (component) or a new indicator.

[0126] In one example, when an RRH or TRP is mapped to (or corresponds to) a CSI-RS port group (e.g., an example provided in the present disclosure), and the UE can select a subset of TRP / RRH (port group) and report CSI for the selected TRP / RRH (port group), the selected TRP / RRH can be reported via an indicator. For example, the indicator can be CRI or PMI (component) or a new indicator.

[0127] In one example, when N RRH When multiple CSI-RS resources (K>1) are configured for each TRP / RRH (e.g., the example provided in the present disclosure), a decoupled (modular) codebook is used / configured, and when N RRH When a single CSI-RS resource (K=1) is configured for each TRP / RRH (e.g., the example provided in the present disclosure), a joint codebook is used / configured.

[0128] As described in U.S. Pat. No. 10659118 (which is incorporated herein by reference in its entirety), the UE is configured with high resolution (e.g., Type II) CSI reporting, where the linear combination based Type I CSI reporting framework is extended to include a frequency dimension in addition to the 1st antenna port dimension and the 2nd antenna port dimension. An illustration of a 3D grid (1st port dimension, 2nd port dimension, frequency dimension) of an oversampled DFT vector is shown in Fig.10 As shown, where: (1) the 1st dimension is associated with the 1st port dimension, (2) the 2nd dimension is associated with the 2nd port dimension, and (3) the 3rd dimension is associated with the frequency dimension.

[0129] Fig.10 An example of a 3D grid 1000 of DFT vectors according to an embodiment of the present disclosure is shown. Fig.10 The embodiment of the 3D grid 1000 of DFT vectors shown is for illustration only.

[0130] The basis sets of the first port domain representation and the second port domain representation 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 The oversampled DFT codebook with an 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 higher layer configured (via RRC signaling).

[0131] As explained in 3GPP standard specification TS 38.213, for enhanced type IICSI reporting, the UE is configured with a higher layer parameter codebookType set to "typeII-PortSelection-r16", where the precoder for all SBs (subbands) and a given layer l=1,...v is given by either of the following, where v is the associated RI value:

[0132]

[0133] or

[0134]

[0135] In these equations: (1) N 1 is the number of antenna ports (with the same antenna polarization) in the first antenna port dimension; (2) N 2 is the number of antenna ports (with the same antenna polarization) in the second antenna port dimension; (3)P CSI-RS is the number of CSI-RS ports configured for the UE; (4) 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 precoding matrix per FD unit / component); (5) a i It is 2N 1 N 2 ×1 (Equation 1) or N 1 N 2 = 1 (Equation 2) column vector, or a i YesP CSIRS ×1 (Equation 1) or a 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; (6) b f YesN 3 ×1 column vector; and (7)c l，i，f is a complex coefficient.

[0136] In one 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 the precoder equation 1 or equation 2 is l，i，f Replace with x l，i，f ×c l，i，f , where: (1) According to some embodiments of the present disclosure, if the coefficient c l，i，f is reported by the UE, then x l，i，f =1; (2) Otherwise, x l，i，f =0 (i.e., cl，i，f Not reported by the UE).

[0137] The instruction is x l，i，f =1 or x l，i，f = 0 is according to some embodiments of the present disclosure. For example, the indication may be via a bitmap.

[0138] In one variation, the precoder equation 1 or equation 2 is summarized as:

[0139]

[0140] and

[0141]

[0142] where for a given i, the number of basis vectors is M i , the corresponding basis vector is {b i，f}. Note 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).

[0143] W l The columns of are normalized to norm 1. For rank R or R layers (v = R), the precoding matrix is ​​given by Given. In the rest of the present disclosure, Equation 2 is assumed. However, the embodiments of the present disclosure are general and also applicable to Equation 1, Equation 3, and Equation 4.

[0144] here, And M≤N 3 .if Then A is the identity matrix and is therefore not reported. Similarly, if M = N 3 , then B is the identity matrix and is therefore not reported. In one example, assume that M < N 3 , to report the columns of B, an oversampled DFT codebook is used. For example, b f =w f , where the quantity w f Depend on Given.

[0145] When O 3 = 1, the FD basis vectors of layer l∈{1, .., v} (where v is the RI or rank value) are given by Given, where and in

[0146] In another example, a discrete cosine transform (DCT) basis is used to construct / report the basis B of the third dimension. The mth column of the DCT compression matrix is ​​simply given by Given, and K = N 3 , m = 0, ..., N 3 -1.

[0147] Since the DCT is applied to real-valued coefficients, the DCT is applied to the real and imaginary parts (of the channel or channel eigenvector) separately. Alternatively, the DCT is applied to the amplitude component and the phase component (of the channel or channel eigenvector) separately. The use of the DFT basis or DCT basis is for illustrative purposes only. The present disclosure is applicable to any other basis vectors for constructing / reporting A and B.

[0148] At a high level, the precoder W l can be described as follows:

[0149]

[0150] Where A=W 1 Corresponds to Rel.15W in the Type IICSI codebook as specified in the 3GPP standard specification 1 , B=W f .

[0151] The matrix consists of all the desired linear combination coefficients (eg, magnitude and phase or real and imaginary parts). 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 In one example, the amplitude coefficient (p l，i，f ) is reported using an A-bit amplitude codebook, where A belongs to {2,3,4}. If multiple values ​​of A are supported, one value is configured via higher layer signaling.

[0152] In another example, the amplitude coefficient (p l，i，f ) is reported as Among them: (1) is the reference amplitude or first amplitude reported using the A1-bit amplitude codebook, where A1 belongs to {2,3,4}, and (2) is the differential amplitude or second amplitude reported using the A2-bit amplitude codebook, where A2≤A1 belongs to {2,3,4}.

[0153] For layer l, let us denote the linear combination (LC) coefficients associated with the spatial domain (SD) basis vectors (or beams) i∈{0, 1, ..., 2L-1} and the frequency domain (FD) basis vectors (or beams) f∈{0, 1, ..., M-1} as c l，i，f , and the strongest coefficient is expressed as The strongest coefficient is K reported from the bitmap using NZ The non-zero (NZ) coefficients are reported in β is configured by higher layers. Assume that the remaining 2LM-K is not reported by the UE NZ The coefficient is zero.

[0154] The following quantification scheme is used to quantify / report K NZ NZ coefficients:

[0155] In one example, for The UE reports the following items for the quantization of the NZ coefficients in: (1) the strongest coefficient index (i * , f * ), where or (i) Strongest coefficient (hence its amplitude / phase is not reported); (2) using two antenna polarization specific reference amplitudes: (i) for the The associated polarization, due to the reference amplitude Therefore it is not reported; and (ii) for the other polarization, the reference amplitude is quantized to 4 bits, in which case the 4-bit amplitude value set (alphabet) is (3) For {c l，i，f , (i, f)≠(i * , f * )}: (i) For each polarization, the differential magnitude of the coefficients is calculated relative to the associated polarization-specific reference amplitude and is quantized to 3 bits, in which case the set of 3-bit amplitude values ​​is Note that the final quantized amplitude p l，i，f Depend on Given; and (ii) each phase is quantized to 8PSK (N ph =8) or 16PSK (N ph =16) (which is configurable).

[0156] For the strongest coefficient The associated polarization * ∈{0,1}, we can have and reference amplitude For the other polarization r∈{0,1} and r≠r * , you can have And the reference amplitude It is quantized (reported) using the 4-bit amplitude codebook described above.

[0157] In the Rel.16 enhanced type II port selection codebook, the UE may be configured to report M FD basis vectors. In one example, Where R is configured by a higher layer from {1, 2}, and p is configured by a higher layer from In one example, for rank 1-2 CSI reports, the p value is configured by a higher layer. For rank > 2 (e.g., rank 3-4), the p value (given by v 0 In one example, for ranks 1-4, (p, v 0 ) is from In the joint configuration, that is, for ranks 1-2, And for ranks 3-4, In one example, N 3 =N SB ×R, where N SB is the number of SBs used for CQI reporting. In one example, M is replaced by M v To show its dependence on the rank value U, we replace p with p v , v∈{1,2}, and v 0 Replace with p v , v∈{3,4}.

[0158] The UE may be configured to: for each layer l∈{1,...,v} of the rank vCSI report, 3 basis vectors to report M freely (independently) in one step v FD basis vectors. Alternatively, the UE may be configured to report M in two steps as follows v FD basis vectors: (1) In step 1, select / report N′ 3 <N 3 An intermediate set (InS) of basis vectors, where InS is common to all layers; and (2) in step 2, for each layer l∈{1,...,v} of the rank v CSI report, N′ in InS 3 freely (independently) choose / report M from the basis vectors v FD basis vectors.

[0159] In one example, when N 3 When ≤19, the one-step method is used, and when N 3>19, a two-step approach is used. In one example, Where α>1 is fixed (eg, fixed to 2) or configurable.

[0160] The codebook parameters used in DFT-based frequency domain compression (Equation 5) are (L, v∈{1,2}p v , v∈{3,4}p v , β, α, N ph ). The value sets of these codebook parameters are as follows: (1) L: The value set is generally {2, 4}, except for L∈{2, 4, 6} for ranks 1-2, 32 CSI-RS antenna ports and R=1; (2) (pv for v∈{1, 2}, pv for v∈{3, 4} v ) (3) (4) α = 2; and (5) N ph =16.

[0161] The value sets of these codebook parameters are shown in Table 1.

[0162] [Table 1] Codebook parameter values

[0163]

[0164] In Rel.17 (further enhanced type II port selection codebook), M∈{1,2), Where K 1 =α×P CSIRS , the codebook parameters (M, α, β) are configured according to Table 2.

[0165] [Table 2] Codebook parameter values

[0166] paramCombination-r17 M α β 1 1 3 / 4 1 / 2 2 1 1 1 / 2 3 1 1 3 / 4 4 1 1 1 5 2 1 / 2 1 / 2 6 2 3 / 4 1 / 2 7 2 1 1 / 2 8 2 1 3 / 4

[0167] The above framework (Equation 5) represents the 1 ) SD beams and M v Multiple (N) FD beams using linear combinations (double sums) 3 By using the FD basis matrix W f Replaced by the time domain (TD) basis matrix W t , this framework can also be used to represent the precoding matrix in TD, where W t The columns include M representing some form of delay or channel tap position. v TD beams. Therefore, the precoder W l It can be described as follows:

[0168]

[0169] In one example, M v TD beams (denoting delay or channel tap positions) are obtained from N 3 The TD beams are selected from a set of N 3 Corresponds to the maximum number of TD units, where each TD unit corresponds to a delay or channel tap position. In one example, one TD beam corresponds to a single delay or channel tap position. In another example, one TD beam corresponds to multiple delays or channel tap positions. In another example, one TD beam corresponds to a combination of multiple delays or channel tap positions.

[0170] In one example, the codebook used for CSI reporting is according to at least one of the following examples.

[0171] In one example, the codebook may be a Rel.15 Type I single panel codebook (eg, as shown in TS 38.214).

[0172] In one example, the codebook may be a Rel.15 Type I multi-panel codebook (eg, as shown in TS 38.214).

[0173] In one example, the codebook may be a Rel.15 Type II codebook (eg, as shown in TS 38.214).

[0174] In one example, the codebook may be a Rel. 15 port selection type II codebook (eg, as shown in TS 38.214).

[0175] In one example, the codebook may be a Rel.16 enhanced type II codebook (eg, as shown in TS 38.214).

[0176] In one example, the codebook may be a Rel.16 enhanced port selection type II codebook (eg, as shown in TS38.214).

[0177] In one example, the codebook may be a Rel.17 further enhanced port selection type II codebook (eg, as shown in TS38.214).

[0178] In one example, the codebook is a new codebook for C-JT CSI reporting.

[0179] In one example, the new codebook is a decoupled codebook (hereinafter referred to as "CB1") including the following components: (1) Intra-TRP: components of the Rel.16 / 17 Type II codebook for each TRP, i.e., SD basis vectors (W1), FD basis vectors (Wf), W2 components (e.g., SCI, index of NZ coefficients, and amplitude / phase of NZ coefficients); and (2) Inter-TRP: a common amplitude (co-amplitude) and a common phase (co-phase) for each TRP.

[0180] In one example, the new codebook is a joint codebook (hereinafter referred to as "CB2") that includes the following components: (1) SD basis vectors (W1) for each TRP; (2) a single joint FD basis vector (Wf); and (3) a single joint W2 component (e.g., SCI, index of NZ coefficients, and amplitude / phase of NZ coefficients).

[0181] Two new codebooks are Fig.11 Shown.

[0182] Fig.11 An example of a codebook 1100 according to an embodiment of the present disclosure is shown. Fig.11 The illustrated embodiment of codebook 1100 is for illustration only.

[0183] In one example, when the codebook is a legacy codebook (e.g., one of the Rel.15 / 16 / 17 NR codebooks according to one of the above examples), the CSI report is based on a CSI resource set including one or more NZP CSI-RS resources, where each NZP CSI-RS resource includes CSI-RS antenna ports of all TRPs / RRHs, i.e., Where P is the total number of antenna ports, P r is the number of antenna ports associated with the rth TRP. In this case, the TRP corresponds to (or is mapped to or associated with) a set of antenna ports.

[0184] In one example, when the codebook is a new codebook (eg, one of the two new codebooks described above), the CSI report is based on a CSI resource set including one or more NZP CSI-RS resources.

[0185] In one example, each NZP CSI-RS resource includes the CSI-RS antenna ports of all TRPs / RRHs, i.e., Where P is the total number of antenna ports, P r is the number of antenna ports associated with the rth TRP. In this case, the TRP corresponds to (or is mapped to or associated with) a set of antenna ports.

[0186] In one example, each NZP CSI-RS resource corresponds to (or is mapped to or associated with) one TRP / RRH (TRP group).

[0187] In this disclosure, N, N TRP 、N RRH .

[0188] In one embodiment, the UE is configured with CSI reporting based on an mTRP (or D-MIMO or C-JT) codebook via a higher layer parameter codebookType, e.g., set to "typeII-r18-cjt" or "typeII-PortSelection-r18-cjt", where the codebook is one of the following two modes: In one example, one of the two modes is configured, e.g., via a higher layer (e.g., via parameter codebookMode).

[0189] In one example of Mode 1, the SD / FD basis selection for each TRP / TRP group (or for each CSI-RS resource). Example formula (N TRP = number of TRPs or TRP groups): UE reports (i) SD basis vectors per TRP, (ii) FD basis vectors per TRP, and (iii) either one joint W2 across all TRPs or one W2 per TRP:

[0190] In one example of Mode 2, the SD base selection and (across N TRP The FD basis selection of the union of TRPs. Example formula (N TRP = number of TRPs or TRP groups): UE reports (i) SD basis vectors per TRP, (ii) one common / joint FD basis vector across all TRPs, and (iii) one joint W2 across all TRPs or one W2 per TRP: or Where N and N can be used interchangeably TRP .

[0191] In one example, Mode 1 may be the codebook described in U.S. Patent Application No. 18 / 310,396 (incorporated herein by reference in its entirety), and Mode 2 may be the codebook described in the embodiments described in U.S. Patent Application No. 18 / 310,396 (incorporated herein by reference in its entirety).

[0192] In one example, the two modes can share similar detailed designs, such as parameter combinations, basis selection, TRP (group) selection, reference amplitude, Quantitative solution.

[0193] In one example, the parameter combination may be L, p, etc. of the rule type IICJT codebook. v , β, or a parameter tuple of M, α, β of a port selection type IICJT codebook.

[0194] In one example, the base selection scheme may be the SD base selection and / or the FD base selection scheme described in Example 1 described in US Patent Application No. 18 / 310,396 (incorporated herein by reference in its entirety).

[0195] In one example, TRP selection may be a component / example described in U.S. Patent Application No. 18 / 295,219 (incorporated herein by reference in its entirety).

[0196] In one example, the reference amplitude scheme may be one of the components / examples described in US Patent Application No. 18 / 305,241 (incorporated herein by reference in its entirety).

[0197] In one example, The quantization scheme may include a strongest coefficient indicator, an upper limit on non-zero coefficients, a reference amplitude, a scheme to decompose each coefficient into phase and amplitude and select corresponding codebooks for them, and codebook subset constraints.

[0198] In Rel-16 / 17 type IICSI report, the mapping order of CSI fields of one CSI report (CSI part 1) is given by 3GPP TS 38.212 as shown below.

[0199] [Table 3] Mapping order of CSI fields in a CSI report (CSI part 1)

[0200]

[0201] In Rel-16 type IICSI report, the mapping order of CSI fields of one CSI report (CSI part 2) is given by 3GPP TS 38.212 as follows:

[0202] [Table 4] Mapping order of CSI fields codebookType=typeII-r16 or typeII-PortSelection-r16 in a CSI report (CSI part 2)

[0203]

[0204]

[0205] In Rel-16 type IICSI report, the mapping order of CSI fields of one CSI report (CSI part 2) is given by 3GPP TS 38.212 as follows:

[0206] [Table 5] Mapping order of CSI fields codebookType=typeII-PortSelection-r17 of a CSI report (CSI part 2)

[0207]

[0208] Fig.12 An example of UCI for multiplexing and reporting CSI 1200 according to an embodiment of the present disclosure is shown. Fig.12 The illustrated embodiment for multiplexing and reporting UCI of CSI 1200 is for illustration only.

[0209] In one embodiment 1, the two-part UCI ( Fig.12 ) is used to multiplex and report CSI including CSI part 1 and CSI part 2 according to the above framework (e.g., mode 1 / mode 2 codebook), wherein the following embodiments and examples may be provided.

[0210] In one embodiment, UCI part 1 includes CQI, RI and I NZ The CSI part 1 is multiplexed and encoded together, where I NZ is an indicator about the number of non-zero (NZ) coefficients (at least one of the following examples may be considered).

[0211] In one example, the indicator I NZ Is a joint indicator, or includes an indicator vN value A separate indicator for Indicates the number of non-zero (NZ) coefficients for layer l and TRP (CSI-RS resource) r.

[0212] In one example, the indicator I NZ Is a joint indicator, or includes an indicator of N values A separate indicator.

[0213] In one example, the indicator I NZ Is a joint indicator, or includes an indicator v values A separate indicator.

[0214] In one example, the indicator I NZ Indicative value

[0215] In one example, the indicator I NZIs a joint indicator, or includes indicators n∈[1,N] values In one example, n is fixed, or determined by a predefined rule, or configured by the NW, or determined by the UE and reported as part of the CSI. In one example, if n is determined by the UE, then CSI Part 1 also includes an indicator indicating n, where the size of the indicator is In one example, n may be calculated by counting the "1"s (or "0"s) in an N-bit bitmap.

[0216] In one example, the indicator I NZ Is a joint indicator, or includes an indicator v values In one example, n is fixed, or determined by a predefined rule, or configured by the NW, or determined by the UE and reported as part of the CSI. In one example, if n is determined by the UE, then CSI part 1 also includes an indicator indicating n, where the size of the indicator is In one example, the indicator is a CRI. In one example, n can be calculated by counting the "1"s (or "0"s) in the N-bit bitmap.

[0217] In one example, the indicator I NZ instruct Where n∈[1,N]. In one example, n is fixed, or determined by a predefined rule, or configured by the NW, or determined by the UE and reported as part of the CSI. In one example, if n is determined by the UE, then CSI part 1 also includes an indicator indicating n, where the size of the indicator is In one example, the indicator is a CRI. In one example, n can be calculated by counting the "1"s (or "0"s) in the N-bit bitmap.

[0218] In one example, CSI part 1 includes a CRI (CSI-RS indicator), where the size of the CRI is

[0219] In one example, CSI part 1 includes one or more (n≥1) CRIs, where the size of the CRI is or N bits (i.e., a bitmap of length N). In one example, n is fixed, or determined by a predefined rule, or configured by the NW, or determined by the UE and reported as part of the CSI. In one example, if n is determined by the UE, then CSI part 1 also includes an indicator indicating n, where the size of the indicator is

[0220] In one example, CSI part 1 includes a bitmap of size N (eg, TRP selection).

[0221] In one example, CSI part 1 includes the order of CRIs (CRI ranking) among N TRPs (CSI-RS resources), where the order of CRIs is

[0222] In one example, CSI part 1 includes the order (CRI ranking) of CRIs among n (∈[1, N]) TRPs (CSI-RS resources), where the order of CRIs is In one example, n is fixed, or determined by a predefined rule, or configured by the NW, or determined by the UE and reported as part of the CSI. In one example, if n is determined by the UE, then CSI part 1 also includes an indicator indicating n, where the size of the indicator is

[0223] In one example, CSI part 1 includes the order (CRI ranking) of CRIs among n (∈[1, N]) TRPs (CSI-RS resources), where the order of CRIs is P(N,n) is

[0224] In one example, CSI part 1 includes the number L of SD vectors r (r=1, ..., N) indicator (For example, when reporting L corresponding to all configured TRPs (CSI-RS resources) r hour).

[0225] In one example, the indicator Is a joint indicator, or includes an indicator N values ​​(L 1 , …, L N ) is a separate indicator.

[0226] In one example, the indicator Is a joint indicator, or includes an indicator N-1 values ​​(L 1 , …, L N-1 ). In this case, if L sum , then L N Can be based on (L 1 , …, L N-1 )and to be sure.

[0227] In one example, the indicator Is a joint indicator, or includes an indicator N values ​​(L φ(1) , …, L φ(N) ), where φ(·) is a permutation function that reorders the TRP indices (CSI-RS resources) used for reporting. For example, φ(·) can be determined based on the CRI ordering in CSI part 1.

[0228] In one example, the indicator Is a joint indicator, or includes an indicator N-1 values ​​(L φ(1) , …, L φ(N-1) ), where φ(·) is a permutation function that reorders the TRP indices (CSI-RS resources) for reporting. For example, φ(·) can be determined based on the CRI ordering in CSI part 1. In this case, if L is configured sum , then L φ(N) Can be based on (L φ(1) , …, L φ(N-1) )and to be sure.

[0229] In one example, CSI part 1 includes the number L of SD vectors r Indicator of (r∈S) where S is a subset of {1, ..., N} (e.g., when reporting L corresponding to the selected TRP set r hour).

[0230] In one example, the indicator Is a joint indicator, or includes an indicator |S| value {L r} r∈S A separate indicator.

[0231] In one example, the indicator is a joint indicator, or includes an indicator to exclude an L r (For example, the L corresponding to the last TRP index r in S r ) after |S|-1 values ​​{L r} r∈S In this case, if L is configured sum , then the excluded L r Can be based on and to be sure.

[0232] In one example, the indicator is a joint indicator, or includes an indicator indicating N values ​​{L φ(r)} r∈S, where φ(·) is a permutation function that reorders the TRP indices (CSI-RS resources) for reporting. For example, φ(·) can be determined based on the CRI ordering in CSI part 1.

[0233] In one example, the indicator is a joint indicator, or includes an indicator to exclude an L φ(r) (For example, the L corresponding to the last TRP index r in S φ(r) ) after N-1 values ​​{L φ(r)} r∈S , where φ(·) is a permutation function that reorders the TRP indices (CSI-RS resources) for reporting. For example, φ(·) can be determined based on the CRI ordering in CSI part 1. In this case, if L is configured sum , then the excluded L φ(r) Can be based on and to be sure.

[0234] In one example, CSI part 1 includes the number L of SD vectors r (r=1, ..., N) indicator The indicator Is a joint indicator, or includes two values and A separate indicator for are the L values ​​of the first TRP group in {1, ..., N}, are L values ​​of the second TRP group in {1, ..., N}. It can be based on at least one of the following examples.

[0235] In one example, the first group includes the strongest / reference TRP and the second group includes all TRPs excluding the strongest / reference TRP.

[0236] In one example, the first group includes two stronger TRPs and the second group includes all TRPs excluding the two stronger TRPs.

[0237] In one example, this example may be applied only when N≥x, such as when x=3 and / or 4.

[0238] In one example, CSI part 1 includes the number L of SD vectors r Indicator of (r∈S) The indicator Is a joint indicator, or includes two values and A separate indicator for are the L values ​​of the first TRP group in S, are L values ​​of the second TRP group in S. It can be according to at least one of the following examples.

[0239] In one example, the first group includes the strongest / reference TRP and the second group includes all TRPs in S excluding the strongest / reference TRP.

[0240] In one example, the first group includes two stronger TRPs, and the second group includes all TRPs in S excluding the two stronger TRPs.

[0241] In one example, this example may be applied only when N≥x, such as when x=3 and / or 4.

[0242] In another embodiment, UCI part 2 includes L1, the first PMI i 1 and the second PMI i 2 The CSI part 2 is multiplexed and encoded together.

[0243] In one embodiment, CSI Part 2 is divided into two segments or three groups. The three groups of CSI Part 2 are denoted by G0, G1, and G2.

[0244] In one example, CSI part 2 group 0 (G0) can be based on at least one of the following examples (eg, for the case of a single L value).

[0245] In one example, G0 includes LI, indication (q 1 ,q 2 ) of the SD twiddle factor (e.g., spanning TRP i 1，1 ), an SD basis indicator indicating the selection of L vectors (e.g., an i across TRP indicating L SD vectors 1，2 ) and SCI (e.g., across TRP an i 1，8，l ).

[0246] In one example, G0 includes LI, indication (q 1 ,q 2 ) of the SD twiddle factor (e.g., spanning TRP i 1，1 ), an SD-based indicator indicating the L beam selections for each TRPr (e.g., an i indicating the L SD vectors for each TRPr). 1,2,r ) and SCI (e.g., across TRP an i 1,8,l ).

[0247] In one example, G0 includes LI, indication (q 1 ,q 2 ) of the SD twiddle factor (e.g., spanning TRP i1,1 ), an SD basis indicator indicating the selection of L beams (e.g., an i indicating L SD vectors across TRP 1,2 ) and one SCI per TRPr (e.g., one i per TRP 1,8,l,r ).

[0248] In one example, G0 includes LI, indication (q 1 ,q 2 ) of the SD twiddle factor (e.g., spanning TRP i 1，1 ), an SD-based indicator indicating the L beam selections for each TRPr (e.g., an i indicating the L SD vectors for each TRPr). 1，2，r ) and one SCI per TRPr (e.g., one i per TRP 1，8，l，r ).

[0249] In one example, G0 includes LI, indicating each TRPr (q 1，r ,q 2，r ) of the SD twiddle factors (e.g., one for each TRP i 1，1，r ), an SD-based indicator indicating the selection of L beams (e.g., spanning a TRP i 1，2 ) and SCI (e.g., across TRP an i 1，8，l ).

[0250] In one example, G0 includes LI, indicating each TRPr (q 1，r ,q 2，r ) of the SD twiddle factors (e.g., one for each TRP i 1，1，r ), an SD-based indicator indicating the L beam selections for each TRPr (e.g., one for each TRPr 1，2，r ) and SCI (e.g., across TRP an i 1，8，l ).

[0251] In one example, G0 includes LI, indicating each TRPr (q 1，r ,q 2，r ) of the SD twiddle factors (e.g., one for each TRP i 1,1,r ), an SD-based indicator indicating the selection of L beams (e.g., spanning a TRP i 1，2 ) and one SCI per TRPr (e.g., one i per TRP 1,8,l,r ).

[0252] In one example, G0 includes LI, indicating each TRPr (q 1,r ,q 2,r ) of the SD twiddle factors (e.g., one for each TRP i 1,1,r), an SD-based indicator indicating the L beam selections for each TRPr (e.g., one for each TRPr 1，2，r ) and one SCI per TRPr (e.g., one i per TRP 1，8，l，r ) (for example, for multiple L values).

[0253] In one example, G0 includes LI, indication (q 1 ,q 2 ) of the SD twiddle factor (e.g., spanning TRP i 1，1 ), indicating the L of each TRPr r SD basis indicators selected by the vector (e.g., one indicator per TRP L r SD vector i 1，2，r ) and SCI (e.g., across TRP an i 1，8，l ).

[0254] In one example, G0 includes LI, indication (q 1 ,q 2 ) of the SD twiddle factor (e.g., spanning TRP i 1，1 ), indicating the L of each TRPr r SD basis indicators selected by the vector (e.g., one indicator per TRP L r SD vector i 1，2，r ) and one SCI per TRPr (e.g., one i per TRP 1，8，l，r ).

[0255] In one example, G0 includes LI, indicating each TRPr (q 1，r ,q 2，r ) of the SD twiddle factors (e.g., one for each TRP i 1，1，r ), indicating the L of each TRPr r SD basis indicators selected by the vector (e.g., one indicator per TRP L r SD vector i 1，2，r ) and SCI (e.g., across TRP an i 1，8，l ).

[0256] In one example, G0 includes LI, indicating each TRPr (q 1，r ,q 2，r ) of the SD twiddle factors (e.g., one for each TRP i 1,1，r ), indicating the L of each TRP r r SD basis indicators selected by the vector (e.g., one indicator per TRP L r SD vector i 1，2，r) and one SCI per TRP r (e.g., one i per TRP 1，8，l，r ).

[0257] In one example, when reporting CSI, G0 includes an indication of size (or CRI sorting indicator of the order of CRI (order of TRP if n CSI RSs are selected).

[0258] In one example, when reporting a TRP or CSI-RS resource indicator, G0 includes a size of (or If n CSI RSs are selected, the reference CSI-RS indicator (or the strongest / reference TRP indicator) is

[0259] In one example, G0 includes the number L of SD vectors r (r=1, ..., N) indicator (For example, when reporting L corresponding to all configured TRPs (CSI-RS resources) r hour).

[0260] In one example, the indicator Is a joint indicator, or includes an indicator N values ​​(L 1 , …, L N-1 ) is a separate indicator.

[0261] In one example, the indicator Is a joint indicator, or includes an indicator N-1 values ​​(L 1 , …, L N-1 ). In this case, if L sum , then L N Can be based on (L 1 , …, L N-1 )and to be sure.

[0262] In one example, the indicator Is a joint indicator, or includes an indicator N values ​​(L φ(1) , …, L φ(N) ), where φ(·) is a permutation function that reorders the TRP indices (CSI-RS resources) used for reporting. For example, φ(·) can be determined based on the CRI ordering in CSI part 1.

[0263] In one example, the indicator Is a joint indicator, or includes an indicator N-1 values ​​(L φ(1) , …, Lφ(N-1) ), where φ(·) is a permutation function that reorders the TRP indices (CSI-RS resources) for reporting. For example, φ(·) can be determined based on the CRI ordering in CSI part 1. In this case, if L is configured sum , then L φ(N) Can be based on (L φ(1) , …, L φ(N-1) )and to be sure.

[0264] In one example, G0 includes the number L of SD vectors r Indicator of (r∈S) where S is a subset of {1, ... N} (e.g., when reporting L corresponding to the selected TRP set r hour).

[0265] In one example, the indicator Is a joint indicator, or includes an indicator |S| value {L r} r∈S A separate indicator.

[0266] In one example, the indicator is a joint indicator, or includes an indicator to exclude an L r (For example, the L corresponding to the last TRP index r in S r ) after |S|-1 values ​​{L r} r∈S In this case, if L is configured sum , then the excluded L r Can be based on and to be sure.

[0267] In one example, the indicator is a joint indicator, or includes an indicator indicating N values ​​{L φ(r)} r∈S , where φ(·) is a permutation function that reorders the TRP indices (CSI-RS resources) for reporting. For example, φ(·) can be determined based on the CRI ordering in CSI part 1.

[0268] In one example, the indicator is a joint indicator, or includes an indicator to exclude an L φ(r) (For example, the L corresponding to the last TRP index r in S φ(r) ) after N-1 values ​​{L φ(r)} r∈S, where φ(·) is a permutation function that reorders the TRP indices (CSI-RS resources) for reporting. For example, φ(·) can be determined based on the CRI ordering in CSI part 1. In this case, if L is configured sum , then the excluded L φ(r) Can be based on and to be sure.

[0269] In one example, G0 includes the number L of SD vectors r (r=1, ..., N) indicator The indicator Is a joint indicator, or includes two values and A separate indicator for are the L values ​​of the first TRP group in {1, ..., N}, are L values ​​of the second TRP group in {1, ..., N}. It can be based on at least one of the following examples.

[0270] In one example, the first group includes the strongest / reference TRP and the second group includes all TRPs excluding the strongest / reference TRP.

[0271] In one example, the first group includes two stronger TRPs and the second group includes all TRPs excluding the two stronger TRPs.

[0272] In one example, this example may be applied only when N≥x, such as when x=3 and / or 4.

[0273] In one example, G0 includes the number L of SD vectors r Indicator of (r∈S) The indicator Is a joint indicator, or includes two values and A separate instruction, where are the L values ​​of the first TRP group in S, are L values ​​of the second TRP group in S. It can be according to at least one of the following examples.

[0274] In one example, the first group includes the strongest / reference TRP and the second group includes all TRPs in S excluding the strongest / reference TRP.

[0275] In one example, the first group includes two stronger TRPs, and the second group includes all TRPs in S excluding the two stronger TRPs.

[0276] In one example, this example may be applied only when N≥x, such as when x=3 and / or 4.

[0277] In one example, G0 includes any combination of indicators described in the example of CSI Part 2, which can be explained below.

[0278] In one example, G0 includes any combination of the indicators described in the above examples.

[0279] In one example, CSI part 2 group 1 (G1) and group 2 (G2) include components according to at least one of the following examples (e.g., similar to the legacy (e.g., Rel-16 T2 CB) case where the amplitude indicator, phase indicator, and bitmap indicator are split into two groups).

[0280] In one example: (1) G1 includes an FD offset indicator (eg, i 1，5 ), indicating M v (or M) vectors of selected FD indicators (e.g., i 1，6，l ), reference amplitude indicator (e.g., i 2，3，l ), the first group A of NZ coefficients 1 The amplitude indicator and phase indicator (for example, i 2，4，l 、i 2,5,l ) and the first group B 1 A bitmap indicator (for example, i 1,7,l ); and (2) G2 includes a second set A of NZ coefficients 2 The amplitude indicator and phase indicator (for example, i 2,4,l 、i 2,5,l ) and the second group B 2 A bitmap indicator (for example, i 1，7，l ).

[0281] In one example: (1) G1 includes an FD offset indicator (eg, i 1，5 ), indicating M v (or M) vectors of selected FD indicators (e.g., i 1，6，l ), reference amplitude indicator (e.g., i 2，3，l ), the first group A of NZ coefficients 1 The amplitude indicator and phase indicator (for example, i 2，4，l 、i 2，5，l ) and the first group B 1 A bitmap indicator for each TRP (e.g., i 1，7，l，r ); and (2) G2 includes a second set A of NZ coefficients 2 The amplitude indicator and phase indicator (for example, i 2，4，l 、i2，5，l ) and the second group B 2 A bitmap indicator for each TRP (e.g., i 1，7，l，r ).

[0282] In one example: (1) G1 includes an FD offset indicator (eg, i 1，5 ), indicating M v (or M) vectors of selected FD indicators (e.g., i 1，6，l ), reference amplitude indicator (e.g., i 2，3，l ), the first group A of NZ coefficients 1 The amplitude indicator and phase indicator for each TRP (e.g., i 2，4，l，r 、i 2，5，l，r ) and the first group B 1 A bitmap indicator (for example, i 1，7，l ); and (2) G2 includes a second set A of NZ coefficients 2 The amplitude indicator and phase indicator for each TRP (e.g., i 2，4，l，r 、i 2，5，l，r ) and the second group B 2 A bitmap indicator (for example, i 1，7，l ).

[0283] In one example: (1) G1 includes an FD offset indicator (eg, i 1，5 ), indicating M v (or M) vectors of selected FD indicators (e.g., i 1，6，l ), reference amplitude indicator (e.g., i 2，3，l ), the first group A of NZ coefficients 1 The amplitude indicator and phase indicator for each TRP (e.g., i 2，4，l，r 、i 2，5，l，r ) and the first group B 1 A bitmap indicator for each TRP (e.g., i 1，7，l，r ); and (2) G2 includes a second set A of NZ coefficients 2 The amplitude indicator and phase indicator for each TRP (e.g., i 2，4，l，r 、i 2，5，l，r ) and the second group B 2 A bitmap indicator for each TRP (e.g., i 1，7，l，r ).

[0284] In one example, for any of Examples 1.1.2.1-1.1.2.4, G1 includes an FD offset indicator (eg, i 1，5，r ), rather than spanning a TRP with an FD offset indicator.

[0285] In one example, this may only be applied / used in Mode 1, ie, only when Mode 1 is configured.

[0286] In one example, this may only be applied / used in Mode 2, ie, only when Mode 2 is configured.

[0287] In one example, this may be applied / used in both Mode 1 and Mode 2, ie, either Mode 1 or Mode 2 is configured.

[0288] In one example (eg, for the examples provided in this disclosure), G1 includes an FD offset indicator (eg, i 1，5，r ), rather than spanning a TRP with an FD offset indicator.

[0289] In one example, this may only be applied / used in Mode 1, ie, only when Mode 1 is configured.

[0290] In one example, this may only be applied / used in Mode 2, ie, only when Mode 2 is configured.

[0291] In one example, this may be applied / used in both Mode 1 and Mode 2, ie, either Mode 1 or Mode 2 is configured.

[0292] In one example (eg, for the examples provided in this disclosure), G1 includes an indication of an M v，r (or M r ) FD indicators for beam selection (e.g., i 1，6，l，r ), rather than an indication M v FD indicator for (or M) beam selections.

[0293] In one example, this may only be applied / used in Mode 1, ie, only when Mode 1 is configured.

[0294] In one example, this may only be applied / used in Mode 2, ie, only when Mode 2 is configured.

[0295] In one example, this may be applied / used in both Mode 1 and Mode 2, ie, either Mode 1 or Mode 2 is configured.

[0296] A case where some other indicators except the amplitude indicator, the phase indicator and the bitmap indicator are divided into two groups.

[0297] In one example: (1) G1 includes an FD offset indicator (eg, i 1，5 ), indicating M v(or M) vectors of selected FD indicators (e.g., i 1，6，l ), reference amplitude indicator (e.g., i 2，3，l ), the first group A of NZ coefficients 1 The amplitude and phase (for example, i 2，4，l 、i 2，5，l ) and the first group B 1 A bitmap indicator (for example, i 1，7，l ); and (2) G2 includes a second set A of NZ coefficients 2 The amplitude and phase (for example, i 2，4，l 、i 2，5，l ) and the second group B 2 A bitmap indicator (for example, i 1，7，l )

[0298] In one embodiment, the FD offset indicator (eg, i 1，5 or 1，5，r ) and / or indicate M v (or M)(M v,r (or M r )) vector selected FD indicator (e.g., i 1,6,l or 1,6,l,r ) is included in CSI part 2 group 0 (G0) instead of G1 described in any of the examples provided in the present disclosure.

[0299] In one example, G0 includes an FD offset indicator (e.g., i 1，5 ). For G1 and G2, the FD offset indicator (eg, i 1，5 ) followed by at least one example.

[0300] In one example, this may only be applied / used in Mode 1, ie, only when Mode 1 is configured.

[0301] In one example, this may only be applied / used in Mode 2, ie, only when Mode 2 is configured.

[0302] In one example, this may be applied / used in both Mode 1 and Mode 2, ie, either Mode 1 or Mode 2 is configured.

[0303] In one example, G0 includes an FD offset indicator (e.g., i ) for each of the N TRPs (or N-1 TRPs excluding the reference / strongest TRP) in addition to any combination of indicators described in any of the examples provided in this disclosure. 1，5，r). For G1 and G2, the FD offset indicator (e.g., i ) for each TRP excluding the N TRPs in G1 (or excluding the N-1 TRPs after the reference / strongest TRP) described in the examples provided in this disclosure may be applied. 1，5，r ) followed by at least one example.

[0304] In one example, this may only be applied / used in Mode 1, ie, only when Mode 1 is configured.

[0305] In one example, this may only be applied / used in Mode 2, ie, only when Mode 2 is configured.

[0306] In one example, this may be applied / used in both Mode 1 and Mode 2, ie, either Mode 1 or Mode 2 is configured.

[0307] In one example, G0 includes an indicator M in addition to any combination of indicators described in any of the examples provided in this disclosure. v (or M) vectors of selected FD indicators (e.g., i 1，6，l ). For G1 and G2, the exclusion of the indication M in G1 described in the examples provided in this disclosure can be applied. v (or M) vectors of selected FD indicators (e.g., i 1,6,l ) followed by at least one example.

[0308] In one example, this may only be applied / used in Mode 1, ie, only when Mode 1 is configured.

[0309] In one example, this may only be applied / used in Mode 2, ie, only when Mode 2 is configured.

[0310] In one example, this may be applied / used in both Mode 1 and Mode 2, ie, either Mode 1 or Mode 2 is configured.

[0311] In one example, G0 includes an indicator M in addition to any combination of indicators described in any of the examples provided in this disclosure. v，r (or M r ) vector selected FD indicators (e.g., i 1，6，l，r ). For G1 and G2, the exclusion of the indication M in G1 described in the examples provided in this disclosure can be applied. v，r (or M r ) vector selected FD indicators (e.g., i 1，6，l，r ) followed by at least one example.

[0312] In one example, this may only be applied / used in Mode 1, ie, only when Mode 1 is configured.

[0313] In one example, this may only be applied / used in Mode 2, ie, only when Mode 2 is configured.

[0314] In one example, this may be applied / used in both Mode 1 and Mode 2, ie, either Mode 1 or Mode 2 is configured.

[0315] In one example, G0 includes an FD offset indicator (e.g., i 1，5 ) and indication M v (or M) vectors of selected FD indicators (e.g., i 1，6，l ). For G1 and G2, the FD offset indicator (eg, i 1，5 ) and indication M v (or M) vectors of selected FD indicators (e.g., i 1，6，l ) followed by at least one example.

[0316] In one example, this may only be applied / used in Mode 1, ie, only when Mode 1 is configured.

[0317] In one example, this may only be applied / used in Mode 2, ie, only when Mode 2 is configured.

[0318] In one example, this may be applied / used in both Mode 1 and Mode 2, ie, either Mode 1 or Mode 2 is configured.

[0319] In one example, G0 includes an FD offset indicator (e.g., i ) for each of the N TRPs (or N-1 TRPs excluding the reference / strongest TRP) in addition to any combination of indicators described in any of the examples provided in this disclosure. 1，5，r ) and instructions M v (or M) vectors of selected FD indicators (e.g., i 1，6，l ). For G1 and G2, the FD offset indicator (e.g., i ) for each TRP excluding the N TRPs in G1 (or excluding the N-1 TRPs after the reference / strongest TRP) described in the examples provided in this disclosure may be applied. 1，5，r ) and instructions M v (or M) vectors of selected FD indicators (e.g., i 1，6，l ) followed by at least one indication.

[0320] In one example, this may only be applied / used in Mode 1, ie, only when Mode 1 is configured.

[0321] In one example, this may only be applied / used in Mode 2, ie, only when Mode 2 is configured.

[0322] In one example, this may be applied / used in both Mode 1 and Mode 2, ie, either Mode 1 or Mode 2 is configured.

[0323] In one example, G0 includes an FD offset indicator (e.g., i 1，5 ) and indication M v，r (or M r ) vector selected FD indicators (e.g., i 1，6，l，r ). For G1 and G2, the FD offset indicator (eg, i 1，5 ) and indication M v，r (or M r ) vector selected FD indicators (e.g., i 1，6，l，r ) followed by at least one example.

[0324] In one example, this may only be applied / used in Mode 1, ie, only when Mode 1 is configured.

[0325] In one example, this may only be applied / used in Mode 2, ie, only when Mode 2 is configured.

[0326] In one example, this may be applied / used in both Mode 1 and Mode 2, ie, either Mode 1 or Mode 2 is configured.

[0327] In one example, G0 includes an FD offset indicator (e.g., i ) for each of the N TRPs (or N-1 TRPs excluding the reference / strongest TRP) in addition to any combination of indicators described in any of the examples provided in this disclosure. 1，5，r ) and instructions M v，r (or M r ) vector selected FD indicators (e.g., i 1，6，l，r ). For G1 and G2, the FD offset indicator (e.g., i ) for each TRP excluding the N TRPs in G1 (or excluding the N-1 TRPs after the reference / strongest TRP) described in the examples provided in this disclosure may be applied. 1，5，r ) and instructions M v，r (or M r ) vector selected FD indicators (e.g., i 1，6，l，r ) followed by at least one example.

[0328] In one example, this may only be applied / used in Mode 1, ie, only when Mode 1 is configured.

[0329] In one example, this may only be applied / used in Mode 2, ie, only when Mode 2 is configured.

[0330] In one example, this may be applied / used in both Mode 1 and Mode 2, ie, either Mode 1 or Mode 2 is configured.

[0331] In one embodiment, only when the UE is configured to report CSI using "Mode 1", where SD vector selection for each TRP and FD vector selection for each TRP are allowed (as shown in Mode 1 of Example 0), CSI part 2 can be designed according to at least one example provided for CSI part 2 design in the present disclosure.

[0332] In one embodiment, only when the UE is configured to report CSI using "Mode 2", where SD vector selection for each TRP and FD vector selection common to TRP are allowed (as shown in Mode 2 of Example 0), CSI part 2 can be designed according to at least one of the following examples provided for the design of CSI part 2 in the present disclosure.

[0333] In one example, when the CSI report on the PUSCH includes two parts, the UE may omit a portion of the Part 2 CSI. The omission of Part 2 CSI is based on the priority order shown in 3GPP TS 38.214, where N Rep is the number of CSI reports configured to be carried on PUSCH. Priority 0 is the highest priority, priority 2N Rep is the lowest priority, and CSI report n corresponds to N defined in 3GPP TS 38.214 Rep CSI reports with the nth smallest Pri i，CSI CSI reporting of (y, k, c, s) values.

[0334] The subbands for a given CSI report n, indicated by the higher layer parameter csi-ReportingBand, are numbered consecutively in ascending order with the lowest subband of the csi-ReportingBand being subband 0. When omitting Part 2 CSI information for a particular priority, the UE may omit all information for that priority.

[0335] For enhanced Type II reporting (Rel-16 Type IICSI reporting), for a given CSI report n, the index i indexed by l, i and f 2，4，l 、i 2，5，l and i 1,7，lEach report element of is associated with a priority value Pri(l,i,f)=2·L·v·π(f)+v·i+l, where where l = 1, 2, ..., v, i = 0, 1, ..., 2L-1, f = 0, 1, ..., M v -1, and where is defined in the 3GPP standard specification. The element with the highest priority has the lowest associated value Pri(l, i, f). The omission of Part 2 CSI is based on the priority order shown in 3GPP TS 38.214, where: (1) Group 0 includes index i 1，l (if reported), i 1，2 (if reported) and i 1，8，l (l=1, ..., v); (2) Group 1 includes index i 1，5 (if reported), i 1,6，l (if reported), i 1，7，l of The highest priority element, i 2，3，l 、i 2，4，l of The highest priority element and i 2，5，l of highest priority elements (l=1, ..., v); and (3) group 2 includes i 1，7，l of The lowest priority element, i 2，4，l of The lowest priority element and i 2，5，l of lowest priority elements (l=1, ..., v).

[0336] For further enhanced Type II port selection reporting, for a given CSI report n, i indexed by l, i and f 2，4，l 、i 2，5，l and i 1，7，l Each report element has a priority value Pri(l, i, f) = K 1 v·f+v·i+l are associated, l=1, 2, ..., v, i=0, 1, ..., K 1 -1, f=0, ..., M-1. The element with the highest priority has the lowest associated value Pri(l, i, f). The omission of Part 2 CSI is based on the priority order shown in 3GPP TS 38.214, where: (1) Group 0 includes i 1，2 (if reported), i 1，8，l (l=1, ..., v) and i 1，6 (if reported); (2) Group 1 includes i 1，7，l of the highest priority elements (if reported), i 2，4，l of The highest priority element and i 2，5，l of highest priority elements (l=1, ..., v); and (3) group 2 includes i 1，7，l of the lowest priority element (if reported), i 2，4，l of The lowest priority element and i 2，5，l of lowest priority elements (l=1, ..., v).

[0337] In one embodiment, for X 1 and X 2 The group segmentation of (where X∈{A, B, ...}, A, B, ... are described in Example 1.1) can be based on priority rules, for example, to determine the two halves of the NZ coefficients (e.g., i 2，4，l 、i 2，5，l ) and / or NZ coefficient bitmap (e.g., i 1，7，l ). Each reporting element of the index of component X is sorted or numbered according to at least one of the following schemes.

[0338] In one example, the priority rule may be as follows: (layer→SD→FD). Each reporting element of the index of component X indexed by l, i, and f is associated with a priority value Pri(l, i, f) = 2·L·v·π(f)+v·i+l, where π(·) is a permutation function. The element with the highest priority has the lowest associated value Pri(l, i, f). For index ranges, the following examples may be provided.

[0339] In one example, l=1, 2, ..., v, i=0, 1, ..., 2L-1, f=0, 1, ..., M v -1.

[0340] In one example, l=1, 2, ..., v, i=0, 1, ..., 2L-1, f=0, 1, ..., M v N-1.

[0341] In one example, l=1, 2, ..., v,i=0, 1, ..., 2L-1,

[0342] In one example, l=1, 2, ..., v, i=0, 1, ..., 2LN-1, f=0, 1, ..., M v -1.

[0343] In one example, l=1, 2, ..., v, i=0, 1, ..., 2LN-1, f=0, 1, ..., M v N-1.

[0344] In one example, l=1, 2, ..., v,i=0, 1, ..., 2LN-1,

[0345] In one example, l=1, 2, ..., v, f=0,1,...,M v -1.

[0346] In one example, l=1, 2, ..., v, f=0,1,...,M v N-1.

[0347] In one example, l=1, 2, ..., v,

[0348] For the permutation function, the following examples can be provided.

[0349] In one example, π(f)=f (eg, no permutation).

[0350] In one example, in It is the FD beam index defined in 3GPP TS38.214.

[0351] In one example, in is the FD beam index (r=1, ..., N).

[0352] In one example, in is the FD beam index, δ f，r is the relative FD offset index (r=1, ..., N).

[0353] In one example, the priority rule may be as follows: (layer→SD→FD). Each reporting element of the index of component X indexed by l, i, and f is associated with a priority value Pri(l, i, f) = 2·LN·v·π(·)+v·i+l, where π(·) is a permutation function. The element with the highest priority has the lowest associated value Pri(l, i, f).

[0354] For index ranges, the following examples can be provided.

[0355] In one example, l=1, 2, ..., v, i=0, 1, ..., 2LN-1, f=0, 1, ..., Mv -1.

[0356] In one example, l=1, 2, ..., v, i=0, 1, ..., 2LN-1, f=0, 1, ..., M v N-1.

[0357] In one example, l=1, 2, ..., v,i=0, 1, ..., 2LN-1,

[0358] For the permutation function, the following examples can be provided.

[0359] In one example, π(f)=f (eg, no permutation).

[0360] In one example, in It is the FD beam index defined in 3GPP TS38.214.

[0361] In one example, in is the FD beam index (r=1, ..., N).

[0362] In one example, in is the FD beam index, δ f，r is the relative FD offset index (r=1, ..., N).

[0363] In one example, the priority rule may be as follows: (layer→SD→FD). Each reporting element of the index of component X indexed by l, i, and f is associated with a priority value is associated, where π(·) is a permutation function. The element with the highest priority has the lowest association value Pri(l, i, f).

[0364] For index ranges, the following examples can be provided.

[0365] In one example, l=1, 2, ..., v, f=0,1,...,M v -1.

[0366] In one example, l=1, 2, ..., v, f=0,1,...,M v N-1.

[0367] In one example, l=1, 2, ..., v,

[0368] For the permutation function, the following examples can be provided.

[0369] In one example, π(f)=f (eg, no permutation).

[0370] In one example, in It is the FD beam index defined in 3GPP TS38.214.

[0371] In one example, in is the FD beam index (r=1, ..., N).

[0372] In one example, in is the FD beam index, δ f，r is the relative FD offset index (r=1, ..., N).

[0373] In one example, the priority rule may be as follows: (layer→SD→FD). Each reporting element of the index of component X indexed by l, i, and f is associated with a priority value Pri(l, i, f) = 2·L·vN·π(f)+vN·i+l, where π(·) is a permutation function. The element with the highest priority has the lowest associated value Pri(l, i, f).

[0374] For index ranges, the following examples can be provided.

[0375] In one example, l=1, 2, ..., vN, i=0, 1, ..., 2L-1, f=0, 1, ..., M v -1.

[0376] In one example, l=1, 2, ..., vN, i=0, 1, ..., 2L-1,

[0377] In one example, the priority rule may be as follows: (layer→SD→FD). Each reporting element of the index of component X indexed by l, i, and f is associated with a priority value is associated, where π(·) is a permutation function. The element with the highest priority has the lowest association value Pri(l, i, f).

[0378] For index ranges, the following examples can be provided.

[0379] In one example, l=1, 2, ..., vN, f=0,1,...,M v -1.

[0380] In one example, l=1, 2, ..., vN,

[0381] In one example, the priority rule may be as follows: (layer→SD→FD→TRP). Each report element of the index of component X indexed by l, i, f, and r is associated with a priority value Pri(l, i, f, r) = 2·L·v·M v ·(r-1)+2·L·v·π(·)+v·i+l, where π(·) is a permutation function, where l=1,2,...,v,i=0,1,...,2L-1,f=0,1,...,M v -1, r=1, ..., N. The element with the highest priority has the lowest associated value Pri(l, i, f, r).

[0382] In one example, π(f)=f (eg, no permutation).

[0383] In one example, in It is defined in 3GPP TS38.214.

[0384] In one example, in It is defined similarly to 3GPP TS 38.214.

[0385] In one example, in is the FD beam index, δ f，r is the relative FD offset index (r=1, ..., N).

[0386] In one example, the priority rule is the same as the example provided in the present disclosure, except that Pri(l, i, f, r) = 2·L·v·M v In addition to Pri(l, i, f, r) given by ·r+2·L·v·π(·)+v·i+l.

[0387] In one example, the priority rule may be as follows: (layer→SD→FD→TRP). Each report element indexed by component X indexed by l, i, f, and r is associated with a priority value associated, where π(·) is a permutation function, where l = 1, 2, ..., v, i = 0, 1, ..., 2L-1, f = 0, 1, ..., M v，r -1, r=1, ..., N. The element with the highest priority has the lowest associated value Pri(l, i, f, r).

[0388] In one example, π(·) (eg, no permutation).

[0389] In one example, in It is defined in 3GPP TS38.214.

[0390] In one example, in It is defined similarly to 3GPP TS 38.214.

[0391] In one example, in is the FD beam index, δ f，r is the relative FD offset index (r=1, ..., N).

[0392] In one example, the priority rules are the same as those provided in the present disclosure, except that In addition to the given Pri(l,i,f,r).

[0393] In one example, the priority rule may be as follows: (layer→SD→FD→TRP). Each report element indexed by component X indexed by l, i, f, and r is associated with a priority value associated, where π(·) is a permutation function, where l = 1, 2, ..., v, i = 0, 1, ..., 2L r -1, f = 0, 1, ..., M v -1, r=1, ..., N. The element with the highest priority has the lowest associated value Pri(l, i, f, r).

[0394] In one example, π(f)=f (eg, no permutation).

[0395] In one example, in It is defined in 3GPPTS 38.214.

[0396] In one example, in It is defined similarly to 3GPP TS 38.214.

[0397] In one example, in is the FD beam index, δ f，r is the relative FD offset index (r=1, ..., N).

[0398] In one example, the priority rules are the same as those provided in the present disclosure, except that In addition to the given Pri(l,i,f,r).

[0399] In one example, the priority rule may be as follows: (layer→SD→FD→TRP). Each report element indexed by component X indexed by l, i, f, and r is associated with a priority value associated, where π(·) is a permutation function, where l = 1, 2, ..., v, i = 0, 1, ..., 2L r -1, f = 0, 1, ..., M v，r -1, r=1, ..., N. The element with the highest priority has the lowest associated value Pri(l, i, f, r).

[0400] In one example, π(f)=f (eg, no permutation).

[0401] In one example, in It is defined in 3GPP TS 38.214.

[0402] In one example, in It is defined similarly to 3GPP TS 38.214.

[0403] In one example, in is the FD beam index, δ f，r is the relative FD offset index (r=1, ..., N).

[0404] In one example, the priority rules are the same as those provided in the present disclosure, except that In addition to the given Pri(l,i,f,r).

[0405] In one example, the priority rule may be as follows: (layer→SD→TRP→FD). Each report element of the index of the component X indexed by l, i, f, and r is associated with a priority value Pri(l, i, f, r) = 2·L·v·N·π(·)+2·L·v·(r-1)+v·i+l, where π(·) is a permutation function, where l = 1, 2, ..., v, i = 0, 1, ..., 2L-1, f = 0, 1, ..., M v , r-1(or f=0,1,...,M v，r -1), r = 1, ..., N. The element with the highest priority has the lowest associated value Pri(l, i, f, r).

[0406] In one example, π(f)=f (eg, no permutation).

[0407] In one example, in It is defined in 3GPP TS 38.214.

[0408] In one example, in It is defined similarly to 3GPP TS 38.214.

[0409] In one example, in is the FD beam index, δ f，r is the relative FD offset index (r=1, ..., N).

[0410] In one example, the priority rules are the same as the examples provided in the present disclosure, except that Pri(l,i,f,r) is given by Pri(l,i,f,r)=2·L·v·N·π(·)+2·L·v·r+v·i+l.

[0411] In one example, the priority rule may be as follows: (layer→SD→TRP→FD). Each report element indexed by component X indexed by l, i, f, and r is associated with a priority value associated, where π(·) is a permutation function, where l = 1, 2, ..., v, i = 0, 1, ..., 2L r -1, f = 0, 1, ..., M v -1(or f=0,1,...,M v,r -1), r = 1, ..., N. The element with the highest priority has the lowest associated value Pri(l,i,f,r).

[0412] In one example, π(f)=f (eg, no permutation).

[0413] In one example, in It is defined in 3GPPTS 38.214.

[0414] In one example, in It is defined similarly to 3GPP TS 38.214.

[0415] In one example, in is the FD beam index, δ f,r is the relative FD offset index (r=1, ..., N).

[0416] In one example, the priority rules are the same as those provided in the present disclosure, except that In addition to the given Pri(l,i,f,r).

[0417] In one example, the priority rule may be as follows: (layer→TRP→SD→FD). Each report element of the index of component X indexed by l, i, f, and r is associated with a priority value Pri(l, i, f, r) = 2·L·v·N·π(·)+v·N·i+v·(r-1)+l, where π(·) is a permutation function, where l = 1, 2, ..., v, i = 0, 1, ..., 2L-1, f = 0, 1, ..., M v -1(or f=0,1,...,M v , r-1), r=1, ..., N. The element with the highest priority has the lowest associated value Pri(l, i, f, r).

[0418] In one example, π(f)=f (eg, no permutation).

[0419] In one example, in It is defined in 3GPPTS 38.214.

[0420] In one example, in It is defined similarly to 3GPP TS 38.214.

[0421] In one example, in is the FD beam index, δ f，r is the relative FD offset index (r=1, ..., N).

[0422] In one example, the priority rules are the same as the examples provided in the present disclosure, except that Pri(l,r,f,r) is given by Pru(l,i,f,r)=2·L·v·N·π(·)+v·N·i+v·r+l.

[0423] In one example, the priority rule may be as follows: (layer→TRP→SD→FD). Each report element of the index of component X indexed by l, i, f, and r is associated with a priority value Pri(l,i,f,r)=2·L r ·v·N·π(·)+v·N·i+v·(r-1)+l, where π(·) is a permutation function, where l=1,2,...,v, i=0,1,...,2L r -1, f = 0, 1, ..., M v -1(or f=0,1,...,M v，r -1), r = 1, ..., N. The element with the highest priority has the lowest associated value Pri(l, i, f, r).

[0424] In one example, π(f)=f (eg, no permutation).

[0425] In one example, in It is defined in 3GPPTS 38.214.

[0426] In one example, in It is defined similarly to 3GPP TS 38.214.

[0427] In one example, in is the FD beam index, δ f，r is the relative FD offset index (r=1, ..., N).

[0428] In one example, the priority rule is the same as the example provided in the present disclosure, except that Pri(l, i, f, r) = 2·L r In addition to Pri(l, i, f, r) given by ·v·N·π(·)+v·N·i+v·r+l.

[0429] In one example, the priority rule is the same as the example provided in the present disclosure, except that Pri(l, i, f, r) = 2·L ＊ In addition to Pri(l, i, f, r) given by ·v·N·π(·)+v·N·i+v·(r-1)+l, or L ＊ By L 1 , …, L N A value in is determined.

[0430] In one example, the priority rule is the same as the example provided in the present disclosure, except that Pri(l, i, f, r) = 2·L ＊ In addition to Pri(l, i, f, r) given by ·v·N·π(·)+v·N·i+v·r+l, or L ＊ By L 1 , …, L N A value in is determined.

[0431] In one example, the priority rules are the same as those provided in the present disclosure, except that In addition to the given Pri(l,i,f,r).

[0432] In one example, the priority rules are the same as those provided in the present disclosure, except that In addition to the given Pri(l,i,f,r).

[0433] In one example, the priority rule may be as follows: (TRP→Layer→SD→FD). Each report element of the index of component X indexed by l, i, f, and r is associated with a priority value Pri(l, i, f, r) = 2·L·v·N·π(·)+v·N·i+N·l+r, where π(·) is a permutation function, where l = 1, 2, ..., v, i = 0, 1, ..., 2L-1, f = 0, 1, ..., M v -1(or f=0,1,...,M v，r -1), r = 1, ..., N. The element with the highest priority has the lowest associated value Pri(l, i, f, r).

[0434] In one example, π(f)=f (eg, no permutation).

[0435] In one example, in It is defined in 3GPPTS 38.214.

[0436] In one example, in It is defined similarly to 3GPP TS 38.214.

[0437] In one example, in is the FD beam index, δ f,r is the relative FD offset index (r=1,…,N).

[0438] In one example, the priority rules are the same as the examples provided in the present disclosure, except that Pri(l,i,f,r) is given by Pri(l,i,f,r)=2·L·v·N·π(·)+v·N·i+N·l+(r-1).

[0439] In one example, the priority rule may be as follows: (TRP→Layer→SD→FD). Each report element indexed by component X indexed by l, i, f, and r is associated with a priority value Pri(l, i, f, r) = 2·L r ·v·N·π(·)+v·N·i+N·l+r, where π(·) is a permutation function, where l=1, 2, ..., v, i=0, 1, ..., 2L r -1, f = 0, 1, ..., M v -1(or f=0,1,...,M v，r -1), r = 1, ..., N. The element with the highest priority has the lowest associated value Pri(l, i, f, r).

[0440] In one example, π(f)=f (eg, no permutation).

[0441] In one example, in It is defined in 3GPPTS 38.214.

[0442] In one example, in It is defined similarly to 3GPP TS 38.214.

[0443] In one example, in is the FD beam index, δ f，r is the relative FD offset index (r=1, ..., N).

[0444] In one example, the priority rule is the same as the example provided in the present disclosure, except that Pri(l, i, f, r) = 2·L r In addition to Pri(l, i, f, r) given by ·v·N·π(·)+v·N·i+N·l+(r-1).

[0445] In one example, the priority rule is the same as the example provided in the present disclosure, except that Pri(l, i, f, r) = 2·L ＊ In addition to Pri(l, i, f, r) given by ·v·N·π(·)+v·N·i+N·l+r, or L ＊ By L 1 , …, L N A value in is determined.

[0446] In one example, the priority rule is the same as the example provided in the present disclosure, except that Pri(l, i, f, r) = 2·L ＊ In addition to Pri(l, i, f, r) given by ·v·N·π(·)+v·N·i+N·l+(r-1), or L ＊ By L 1 , …, L N A value in is determined.

[0447] In one example, the priority rules are the same as those provided in the present disclosure, except that In addition to the given Pri(l,i,f,r).

[0448] In one example, the priority rules are the same as those provided in the present disclosure, except that In addition to the given Pri(l,i,f,r).

[0449] In one example, the M described in any example of the present disclosure may be v is replaced by M, i.e., M does not depend on the rank v.

[0450] In one example, the TRP index (or CSI-RS resource index) r described in any example of the present disclosure may start from 0 to N-1, i.e., r=0,...,N-1 (or r=1,...,N).

[0451] In one example, the TRP index (or CSI-RS resource index) r described in any example of the present disclosure may be based on the order of the CRI (eg, determined and reported by the UE via CSI part 1).

[0452] In one example, the TRP index (or CSI-RS resource index) r described in any example of the present disclosure may be based on a configured CSI-RS resource number.

[0453] In one example, the TRP index (or CSI-RS resource index) r described in any example of the present disclosure may be based on a subset of the TRP indexes (eg, the case where the TRP selection is determined and reported by the UE via CSI part 1).

[0454] In one example, the TRP index (or CSI-RS resource index) r described in any example of the present disclosure may start from the TRP associated with the SCI (strongest coefficient indicator).

[0455] In one example, the TRP index (or CSI-RS resource index) r described in any example of the present disclosure may be shifted relative to the TRP associated with the SCI (strongest coefficient indicator).

[0456] In one example, L described in any example of the present disclosure can be replaced by L r , L tot , L ＊ , and its index (i) count limit changes according to the replaced value, where or L ＊ By L 1 , …, L N A value in is determined.

[0457] In one example, the permutation function π(·) may be defined by at least one of the following examples.

[0458] In one example, π(f)=f (eg, no permutation).

[0459] In one example, in It is defined in 3GPPTS 38.214.

[0460] In one example, in It is defined similarly to 3GPP TS 38.214.

[0461] In one example, in is the FD beam index, δ f，r is the relative FD offset index (r=1, ..., N).

[0462] In one example, the permutation function π(·) may be applied / utilized according to at least one of the following examples.

[0463] In one example, the permutation function π(·) may be applied / used only in mode 1, i.e., only when mode 1 is configured. In this case, the priority rule function has the permutation function π(·) only when mode 1 is configured, where the priority rule function may be one of the examples provided in the present disclosure.

[0464] In one example, the permutation function π(·) can be applied / used only in mode 2, that is, only when mode 2 is configured. In this case, the priority rule function has the permutation function π(·) only when mode 2 is configured, where the priority rule function can be one of the examples in the embodiments provided in the present disclosure.

[0465] In one example, the permutation function π(·) can be applied / used in both mode 1 and mode 2, i.e., when mode 1 or mode 2 is configured. In this case, the priority rule function has a permutation function π(·) for both mode 1 and mode 2, wherein the priority rule function can be one of the examples in the embodiments provided in the present disclosure.

[0466] In one example, a permutation function π(·) may be applied to / used for one TRP (e.g., a reference TRP or a strongest TRP), and no permutation function π(·) may be applied to / used for the remaining N-1 TRPs. In this case, the priority rule function has a permutation function π(·) only for the reference TRP, where the priority rule function may be one of the examples in the embodiments provided in the present disclosure.

[0467] In one example, only when mode 1 is configured, the permutation function π(·) can be applied to / used for one TRP (e.g., a reference TRP or the strongest TRP), and no permutation function π(·) can be applied to / used for the remaining N-1 TRPs. In this case, only when mode 1 is configured, the priority rule function has a permutation function π(·) only for the reference TRP, where the priority rule function can be one of the examples in the embodiments provided in the present disclosure.

[0468] In one example, only when mode 2 is configured, the permutation function π(·) can be applied to / used for one TRP (e.g., a reference TRP or the strongest TRP), and no permutation function π(·) can be applied to / used for the remaining N-1 TRPs. In this case, only when mode 2 is configured, the priority rule function has a permutation function π(·) only for the reference TRP, where the priority rule function can be one of the examples in the embodiments provided in the present disclosure.

[0469] In one example, when mode 1 or mode 2 is configured, the permutation function π(·) may be applied to / used for one TRP (e.g., a reference TRP or a strongest TRP), and no permutation function π(·) may be applied to / used for the remaining N-1 TRPs. In this case, when mode 1 or mode 2 is configured, the priority rule function has a permutation function π(·) only for the reference TRP, where the priority rule function may be one of the examples in the embodiments provided in the present disclosure.

[0470] In one example, utilizing / applying the permutation function π(·) in the priority rule function may be configurable via RRC, MAC-CE or DCI. For example, if configured, the function is applied (ON). Otherwise, the function is not applied (OFF).

[0471] In one example, utilizing / applying the permutation function π(·) in the priority rule function may be determined by the UE and reported via CSI part 1 by the UE.

[0472] In one example, utilizing / applying the permutation function π(·) in the priority rule function may be determined by the UE and reported via CSI part 2 by the UE.

[0473] In one embodiment, when the CSI report on the PUSCH (or optionally the PUCCH) includes two parts (Part 1 CSI and Part 2 CSI), the UE may omit (and therefore not report) a portion of Part 2 CSI. The omission of Part 2 CSI is based on the priority order shown in Table 6 or Table 7, where N Repis the number of CSI reports configured to be carried on PUSCH. Priority 0 is the highest priority, priority 2N Rep is the lowest priority, and CSI report n corresponds to N defined in 3GPP TS 38 214 Rep CSI reports with the nth smallest Pri i，CSI CSI reporting of (y, k, c, s) values ​​is described below.

[0474] CSI report and priority value Pri iCSI (y, k, c, s) = 2·N cells ·M s y+N cells ·M s ·k+M s c+s are associated, where: (1) y=0 for aperiodic CSI reporting to be carried on PUSCH; y=1 for semi-persistent CSI reporting to be carried on PUSCH; y=2 for semi-persistent CSI reporting to be carried on PUCCH; y=3 for periodic CSI reporting to be carried on PUCCH; k=0 for CSI reporting carrying L1-RSRP and k=1 for CSI reporting not carrying L1-RSRP; c is the serving cell index and N cells is the value of the higher-layer parameter maxNrofServingCells; s is reportConfigID and M s It is the value of the higher layer parameter maxNrofCSI-ReportConfigurations.

[0475] If the Pri associated with the first CSI report iCSI The value of (y, k, c, s) is lower than the Pri associated with the second CSI report. iCSI (y, k, c, s) values, the priority of the first CSI report is said to be higher than that of the second CSI report.

[0476] The subbands for a given CSI report n, indicated by the higher layer parameter csi-ReportingBand, are numbered consecutively in ascending order with the lowest subband of the csi-ReportingBand being subband 0. When omitting Part 2 CSI information for a particular priority, the UE may omit all information for that priority.

[0477] [Table 6] Priority reporting level of Part 2 CSI

[0478]

[0479] In Table 6, if the CSI report is configured according to the FD compression framework, as provided in the present disclosure, G 1 = Group 1, G 2 = the second group; otherwise (if the CSI report is configured to include subband CSI for each subband independently, i.e., without any FD compression), G 1 = even subband, G 2 = odd subband.

[0480] [Table 7] Priority reporting level of Part 2 CSI

[0481]

[0482] In Table 7, if the CSI report is configured according to the FD compression framework, as provided in the present disclosure, G 0 = Group 1, G 1 = Group 2, G 2 = the third group; otherwise (if the CSI report is configured to include subband CSI for each subband independently, i.e., without any FD compression), G 0 =Broadband, G 1 = even subband, G 2 = odd subband.

[0483] Fig.13 An example method 1300 performed by a UE in a wireless communication system according to an embodiment of the present disclosure is shown. Fig.13 The method 1300 may be performed by Figure 1 Any one 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 1300 is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0484] The method begins when the UE receives information about trp ≥1 CSI reference signal CSI-RS resource and includes CSI part 1 and CSI part 2 (1310). In various embodiments, the information includes information for including in group G0 an indicator indicating an FD offset value for each of the (N-1) CSI-RS resources. In various embodiments, CSI part 1 includes a channel quality indicator (CQI), a rank indicator (RI), and a total number K of non-zero coefficients (NZC) across all v layers and N CSI-RS resources. NZIn various embodiments, the CSI part 2 further includes a group G0, and the group G0 includes: an SD rotation factor (q 1，r ,q 2，r ) indicator i 1，1 ; Indicates the L of each CSI-RS resource r r SD base selection indicator i 1,2 ; and the strongest coefficient indicator i across all N CSI-RS resources of each layer l=1,…,v 1，8，l .

[0485] Then, the UE determines CSI part 2 including group G1 or G2 based on the information (1320). For example, in 1320, based on the priority value The amplitude coefficient indicator and the phase coefficient indicator are included in G1 or G2. In various embodiments, the permutation function π(f) corresponds to in is the FD basis vector index, N 3 is the number of precoding matrices.

[0486] In various embodiments, group G1 includes i 1,7，l of The highest priority element, i 2,4，l of The highest priority element and i 2,5，l of The highest priority elements (l=1,…,v), where i 2,4，l and i 2，5，l is an indicator of the magnitude and phase of the non-zero coefficients, i 1，7，l is a bitmap indicator indicating the position of a non-zero coefficient, and i is indexed by l, i, f, and r. 2，4，l 、i 2，5，l and i 1，7，l Each element of is associated with a priority value Pri(l, i, f, r). In various embodiments, a group corresponds to one of: G0; G0 and G1; or G0, G1, and G2. In various embodiments, group G2 includes i 1，7，l of The lowest priority element, i 2，4，l of The lowest priority element and i 2，5，l of The lowest priority elements (l=1, ..., v), where: i 2，4，l and i 2，5，l is an indicator of the magnitude and phase of the non-zero coefficients, i 2，7，l is a bitmap indicator indicating the position of a non-zero coefficient, and i is indexed by l, i, f, and r. 2，4，l、i 2，5，l and i 1，7，l Each element of is associated with a priority value Pri(l, i, f, r).

[0487] Then, the UE sends CSI part 1 and the determined CSI part 2 ( 1310 ). For example, in 1310 , the UE sends a CSI report including CSI part 1 and CSI part 2 .

[0488] 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 different orders, or occur multiple times. In another example, a step can be omitted or replaced by another step.

[0489] Although the disclosure has been described with exemplary embodiments, various changes and modifications may be conceived by those skilled in the art. The disclosure is intended to cover these changes and modifications that fall within the scope of the appended claims. Any description in this application should not be construed as implying 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), include: Transceiver; as well as a processor operatively coupled to the transceiver and configured to: Receive information about trp ≥CSI report associated with CSI-RS resources, wherein the CSI report includes CSI part 1 and CSI part 2, Based on the information: Determine the CSI part 2 including the group G1 or G2, wherein the amplitude coefficient indicator and the phase coefficient indicator are included in G1 or G2 based on the following priority values: in: π(f) is the permutation function, L r is the number of spatial domain (SD) basis vectors associated with CSI-RS resource r, φ(n) is the mapping of index n∈{1,...,N} to CSI-RS resource index r∈{1,...,N trp }, v is the number of layers, l＝1，2，...，v， i=0,1,...,2L r -1, f=0,1,...,M v -1, M v is the number of frequency domain (FD) basis vectors, and 1≤N≤N trp , The CSI part 1 and the determined CSI part 2 are sent.

2. The UE according to claim 1, in, The permutation function π(f) corresponds to in, is the FD basis vector index, N 3 is the number of precoding matrices.

3. The UE according to claim 1, in, The CSI part 1 includes the channel quality indicator (CQI), the rank indicator (RI), and the total number K of non-zero coefficients (NZC) across all v layers and N CSI-RS resources NZ .

4. The UE according to claim 1, in: The CSI part 2 also includes a group G0, and The group G0 includes: Indicates the SD rotation factor (q 1,r ,q 2,r ) indicator i 1,1 , Indicates the L of each CSI-RS resource r r SD base selection indicator i 1，2 ,as well as The strongest coefficient indicator i across all N CSI-RS resources in each layer l=1,…,v 1,8,l .

5. The UE according to claim 1, in, The group G1 includes i 1,7,l of The highest priority element, i 2，4，l of The highest priority element and i 2，5，l of the highest priority elements (l=1,…,v), in: i 2，4，l and i 2，5，l is an indicator of the magnitude and phase of non-zero coefficients, i 1，7，l is a bitmap indicator indicating the position of the non-zero coefficient, and i indexed by l, i, f, and r 2，4，l 、i 2，5，l and i 1，7，l Each element of is associated with the priority value Pri(l, i, f, r).

6. The UE according to claim 1, in, The information includes information for including an indicator indicating an FD offset value of each of the (N-1) CSI-RS resources in the group G0.

7. The UE according to claim 1, in, The group G2 includes i 1，7，l of The lowest priority element, i 2，4，l of The lowest priority element and i 2，5，l of lowest priority elements (l=1,…,v), in: i 2，4，l and i 2，5，l is an indicator of the magnitude and phase of non-zero coefficients, i 2，7，l is a bitmap indicator indicating the position of the non-zero coefficient, and i indexed by l, i, f, and r 2,4,l 、i 2，5，l and i 1，7，l Each element of is associated with the priority value Pri(l, i, f, r).

8. The UE according to claim 1, in, The group corresponds to one of the following: G0 and G1, or G0, G1 and G2.

9. A base station (BS), include: Transceiver; as well as a processor operatively coupled to the transceiver and configured to: Send about N trp information of a CSI report associated with ≥ 1 channel state information (CSI) reference signal (CSI-RS) resource, wherein the CSI report includes CSI part 1 and CSI part 2; and receiving the CSI part 1 and the CSI part 2; wherein the CSI part 2 includes group G1 or G2, The amplitude coefficient indicator and the phase coefficient indicator are included in G1 or G2 based on the following priority values: in: π(f) is the permutation function, L r is the number of spatial domain (SD) basis vectors associated with CSI-RS resource r, φ(n) is the mapping of index n∈{1,...,N} to CSI-RS resource index r∈{1,...,N trp }, v is the number of layers, l＝1，2，...，v， i=0,1,...,2L r -1, f=0,1,...,M v -1, M v is the number of frequency domain (FD) basis vectors, and 1≤N≤N trp 。 10. The BS according to claim 9, in, The permutation function π(f) corresponds to in, is the FD basis vector index, N 3 is the number of precoding matrices, The CSI part 1 includes a channel quality indicator (CQI), a rank indicator (RI), and a total number K of non-zero coefficients (NZC) across all v layers and N CSI-RS resources. NZ ,and in: The CSI part 2 also includes a group G0, and The group G0 includes: Indicates the SD rotation factor (q 1，r ,q 2，r ) indicator i 1，1 , Indicates the L of each CSI-RS resource r r SD base selection indicator i 1，2 ,as well as The strongest coefficient indicator i across all N CSI-RS resources in each layer l=1,…,v 1，8，l .

11. The BS according to claim 9, in, The group G1 includes i 1，7，l of The highest priority element, i 2，4，l of The highest priority element and i 2，5，l of the highest priority elements (l=1,…,v), in: i 2，4，l and i 2，5，l is an indicator of the magnitude and phase of non-zero coefficients, i 1，7，l is a bitmap indicator indicating the position of the non-zero coefficient, and i indexed by l, i, f, and r 2，4，l 、i 2，5，l and i 1，7，l Each element of is associated with the priority value Pri(l, i, f, r).

12. The BS according to claim 9, in, The group G2 includes i i，7，l of The lowest priority element, i 2，4，l of The lowest priority element and i 2，5，l of lowest priority elements (l=1,…,v), in: i 2，4，l and i 2，5，l is an indicator of the magnitude and phase of non-zero coefficients, i 1，7，l is a bitmap indicator indicating the position of the non-zero coefficient, and i indexed by l, i, f, and r 2,4,l 、i 2,5,l and i 1,7,l Each element of is associated with the priority value Pri(l, i, f, r).

13. The BS according to claim 9, in, The group corresponds to one of the following: G0 and G1, or G0, G1 and G2, and The information includes information for including, in group G0, an indicator indicating an FD offset value of each of the (N-1) CSI-RS resources.

14. A method performed by a user equipment (UE), the method include: Receive information about trp information of a CSI report associated with ≥ 1 channel state information (CSI) reference signal (CSI-RS) resource, wherein the CSI report includes CSI part 1 and CSI part 2, Based on the information, determining the CSI part 2 including the group G1 or G2, wherein the amplitude coefficient indicator and the phase coefficient indicator are included in G1 or G2 based on the following priority values: in: π(f) is the permutation function, L r is the number of spatial domain (SD) basis vectors associated with CSI-RS resource r, φ(n) is the mapping of index n∈{1,...,N} to CSI-RS resource index r∈{1,...,N trp }, v is the number of layers, l＝1,2,...,v， i=0,1,...,2L r -1, f=0,1,...,M v -1, M v is the number of frequency domain (FD) basis vectors, and 1≤N≤N trp , The CSI part 1 and the determined CSI part 2 are sent.

15. A method performed by a base station, the method include: Send about N trp information of a CSI report associated with ≥ 1 channel state information (CSI) reference signal (CSI-RS) resource, wherein the CSI report includes CSI part 1 and CSI part 2; and receiving the CSI part 1 and the CSI part 2; wherein the CSI part 2 includes group G1 or G2, The amplitude coefficient indicator and the phase coefficient indicator are included in G1 or G2 based on the following priority values: in: π(f) is the permutation function, L r is the number of spatial domain (SD) basis vectors associated with CSI-RS resource r, φ(n) is the mapping of index n∈{1,...,N} to CSI-RS resource index r∈{1,...,N trp }, v is the number of layers, l＝1，2，...，v， i=0,1,...,2L r -1, f=0,1,...,M v -1, M v is the number of frequency domain (FD) basis vectors, and 1≤N≤N trp 。

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