CN116806416A

CN116806416A - Method and apparatus for CSI reporting in a wireless communication system

Info

Publication number: CN116806416A
Application number: CN202280013156.6A
Authority: CN
Inventors: M·S·拉赫曼; E·N·翁格萨努斯
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2021-02-03
Filing date: 2022-01-28
Publication date: 2023-09-26

Abstract

The present disclosure relates to 5G or 6G communication systems for supporting higher data transmission rates. A method performed by a User Equipment (UE) in a wireless communication system, comprising: receiving configuration information regarding Channel State Information (CSI) reports, the configuration information comprising codebook parameters (M, α, β), wherein: m is the number of frequency domain basis vectors, α is a number equal to or less than 1, and β is a number equal to or less than 1; identifying values M, α and β; determining a value K based on alpha ₁ Wherein K is ₁ A number of CSI reference signal (CSI-RS) ports selected from the total P CSI-RS ports; determining a maximum number of non-zero coefficients based on β; based on M, K ₁ Determining a CSI report by a maximum number of non-zero coefficients and a value of (2); and transmitting the CSI report.

Description

Method and apparatus for CSI reporting in a wireless communication system

Technical Field

The present disclosure relates generally to wireless communication systems, and more particularly to CSI reporting.

Background

The 5G mobile communication technology defines a wide frequency band, enables high transmission rates and new services, and can be implemented not only in a "below 6 GHz" frequency band such as 3.5GHz, but also in a "above 6 GHz" frequency band called millimeter waves including 28GHz and 39 GHz. Further, in order to achieve a transmission rate 50 times faster than that of the 5G mobile communication technology and an ultra-low delay of one tenth of that of the 5G mobile communication technology, it has been considered to implement the 6G mobile communication technology (referred to as a super 5G system) in a terahertz band (e.g., 95GHz to 3THz band).

In the early stages of the development of 5G mobile communication technology, in order to support services and meet performance requirements related to enhanced mobile broadband (embbb), ultra-reliable low-latency communication (URLLC), and large-scale machine type communication (emtc), there have been standardization regarding beamforming and large-scale MIMO for alleviating radio wave path loss and increasing radio wave transmission distances in mmWave, supporting dynamic operations of digital (e.g., operating a plurality of subcarrier intervals) and slot formats for effectively utilizing mmWave resources, initial access techniques for supporting multi-beam transmission and broadband, definition and operation of BWP (bandwidth part), new channel coding methods such as LDPC (low density parity check) codes for mass data transmission and polarization codes for highly reliable transmission of control information, L2 preprocessing, and network slicing for providing a dedicated network for a specific service.

Currently, in view of services to be supported by the 5G mobile communication technology, discussions are being made about improvement and performance enhancement of the initial 5G mobile communication technology, and there has been physical layer standardization with respect to the following technologies: such as V2X (vehicle alliance) for assisting driving determination of an autonomous vehicle and for enhancing user convenience by based on information about the position and state of the vehicle transmitted by the vehicle, NR-U (new radio unlicensed) aimed at system operation meeting various regulatory-related requirements in an unlicensed band, NR UE power saving, non-terrestrial network (NTN) as UE-satellite direct communication for providing coverage in an area where communication with the terrestrial network is unavailable, and positioning.

Furthermore, standardization of air interface architecture/protocols is underway with respect to the following technologies: such as industrial internet of things (IIoT) for supporting new services through interworking and convergence with other industries, IAB (integrated access and backhaul) for providing nodes for network service area extension by supporting wireless backhaul links and access links in an integrated manner, mobility enhancement including conditional handover and DAPS (dual active protocol stack) handover, and two-step random access (2-step RACH for NR) for simplifying random access procedures. Standardization is also underway with respect to 5G baseline architecture (e.g., service-based architecture or service-based interface) for combining Network Function Virtualization (NFV) and Software Defined Network (SDN) technologies and system architecture/services for Mobile Edge Computing (MEC) for receiving services based on UE location.

As 5G mobile communication systems are commercialized, exponentially growing connection devices will be connected to communication networks, and thus, it is expected that enhanced functions and performances of the 5G mobile communication systems and integrated operations of the connection devices will be necessary. For this reason, new researches related to augmented reality (XR) are planned for supporting AR (augmented reality), VR (virtual reality), MR (mixed reality) and the like at high levels, 5G performance improvement and complexity reduction by using Artificial Intelligence (AI) and Machine Learning (ML), AI service support, metauniverse service support and unmanned aerial vehicle communication.

Furthermore, this development of the 5G mobile communication system will serve as a basis for: not only are new waveforms for providing terahertz band coverage of 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 full duplex technology for improving frequency efficiency of 6G mobile communication technology and improving system network, AI-based communication technology for realizing system optimization by utilizing satellites and AI (artificial intelligence) from a design stage and internalizing end-to-end AI support functions, and next generation distributed computing technology for realizing a service of a degree of complexity exceeding the limit of UE operation capability by utilizing ultra-high performance communication and computing resources.

Disclosure of Invention

[ problem ]

Understanding and properly estimating the channel between a User Equipment (UE) and a Base Station (BS), e.g., a gNode B (gNB), is important for efficient and effective wireless communication. To properly estimate DL channel conditions, the gNB may send reference signals, e.g., CSI-RS, to the UE for DL channel measurements, and the UE may report (e.g., feedback) information about the channel measurements, e.g., CSI, to the gNB. With this DL channel measurement, the gNB can select appropriate communication parameters to efficiently and effectively perform wireless data communication with the UE. There is a need for an efficient CSI reporting method in a wireless communication system.

[ solution to the problem ]

In one embodiment, a method performed by a User Equipment (UE) in a wireless communication system is provided. The method comprises the following steps: receiving configuration information about Channel State Information (CSI) reports, the configuration information including codebook parameters (M, α, β), wherein M is the number of frequency domain basis vectors, α is a number of 1 or less, and β is a number of 1 or less; identifying values M, α, and β; determining a value K based on alpha ₁ Wherein K is ₁ A number of CSI reference signal (CSI-RS) ports selected from the total P CSI-RS ports; determining a maximum number of non-zero coefficients based on β; based on M, K ₁ Determining a CSI report by a maximum number of non-zero coefficients and a value of (2); and transmitting the CSI report.

According to another embodiment, a method performed by a base station in a wireless communication system is provided. The method comprises the following steps: generating configuration information about the CSI report, the configuration information including codebook parameters (M, α, β), wherein M is the number of frequency domain basis vectors, α is a number of 1 or less, and β is a number of 1 or less; transmitting configuration information about CSI reports; and receiving the CSI report. CSI reporting is based on M, K ₁ And the maximum number of non-zero coefficients. The maximum number of non-zero coefficients is based on beta. K (K) ₁ Is based on α and is the number of CSI-RS ports selected from a total of P CSI-RS ports.

In yet another embodiment, a UE in a wireless communication system is provided. The UE includes a transceiver and a controller. The controller is configured to: receiving configuration information about the CSI report via the transceiver, the configuration information including codebook parameters (M, α, β), wherein M is the number of frequency domain basis vectors, α is a number of 1 or less, and β is a number of 1 or less; identifying values M, α, and β; determining a value K based on alpha ₁ Wherein K is ₁ Is the number of CSI-RS ports selected from the total P CSI-RS ports; determining a maximum number of non-zero coefficients based on β; based on M, K ₁ Determining a CSI report by a maximum number of non-zero coefficients and a value of (2); and transmitting the CSI report via the transceiver.

In yet another embodiment, a base station in a wireless communication system is provided.The base station includes a transceiver and a controller. The controller is configured to: generating configuration information about the CSI report, the configuration information including codebook parameters (M, α, β), wherein M is the number of frequency domain basis vectors, α is a number of 1 or less, and β is a number of 1 or less; transmitting configuration information regarding CSI reports via the transceiver; and receives CSI reports via the transceiver. CSI reporting is based on M, K ₁ And the maximum number of non-zero coefficients. The maximum number of non-zero coefficients is based on beta. K (K) ₁ Is based on α and is the number of CSI-RS ports selected from a total of P CSI-RS ports.

Other technical features may be readily apparent to one skilled in the art from the following figures, descriptions, and claims.

[ advantageous effects of the invention ]

Embodiments of the present disclosure provide methods and apparatus for implementing Channel State Information (CSI) reporting in a wireless communication system.

Drawings

For a more complete understanding of the present disclosure and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts:

fig. 1 illustrates an example wireless network according to an embodiment of this disclosure;

FIG. 2 illustrates an example gNB, according to an embodiment of the present disclosure;

fig. 3 illustrates an example UE in accordance with an embodiment of the present disclosure;

fig. 4A illustrates a high-level schematic diagram of an orthogonal frequency division multiple access transmit path according to an embodiment of the present disclosure;

fig. 4B illustrates a high-level schematic diagram of an orthogonal frequency division multiple access receive path according to an embodiment of the present disclosure;

fig. 5 illustrates a transmitter block diagram of PDSCH in a subframe according to an embodiment of the disclosure;

fig. 6 illustrates a receiver block diagram of PDSCH in a subframe according to an embodiment of the disclosure;

Fig. 7 illustrates a transmitter block diagram of PUSCH in a subframe according to an embodiment of the disclosure;

fig. 8 illustrates a receiver block diagram of PUSCH in a subframe according to an embodiment of the disclosure;

fig. 9 illustrates an example antenna block or array forming a beam in accordance with an embodiment of the present disclosure;

fig. 10 illustrates an antenna port layout according to an embodiment of the present disclosure;

FIG. 11 illustrates a 3D grid of oversampled DFT beams in accordance with an embodiment of the present disclosure;

fig. 12 illustrates an example of a port selection codebook that facilitates independent (separate) port selection across SD and FD, and also facilitates joint port selection across SD and FD, according to an embodiment of the present disclosure;

fig. 13 illustrates a flowchart of a method for operating a UE in accordance with an embodiment of the present disclosure; and

fig. 14 illustrates a flowchart of a method for operating a BS according to an embodiment of the present disclosure.

Detailed Description

Before proceeding with the following detailed description, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document. The term "couple" and its derivatives refer to any direct or indirect communication between two or more elements, whether or not those elements are in physical contact with one another. The terms "transmit", "receive" and "communicate" and derivatives thereof encompass both direct and indirect communications. The terms "include" and "comprise" and derivatives thereof mean inclusion without limitation. The term "or" is inclusive, meaning and/or. The phrase "associated with" and derivatives thereof means included, included within, associated with, having, and a property of being inter-connected, contained within, connected to, coupled to, or otherwise associated with the @ and the communication, co-operation, interleaving, juxtaposition, proximity, binding to, or otherwise associated with the @. The term "controller" means any device, system, or portion thereof that controls at least one operation. Such a controller may be implemented in hardware or a combination of hardware and software and/or firmware. The functionality associated with any particular controller may be centralized or distributed, whether locally or remotely. The phrase "at least one," when used with a list of items, means that different combinations of one or more of the listed items may be used and that only one item in the list may be required. For example, "at least one of A, B and C" includes any combination of: A. b, C, A and B, A and C, B and C, and a and B and C.

Furthermore, the various functions described below may be implemented or supported by one or more computer programs, each of which is formed from computer readable program code and which is embodied in a computer readable medium. The terms "application" and "program" refer to one or more computer programs, software components, sets of instructions, procedures, functions, objects, classes, instances, related data, or a portion thereof adapted for implementation in a suitable computer readable program code. The phrase "computer readable program code" includes any type of computer code, including source code, object code, and executable code. The phrase "computer readable medium" includes any type of medium capable of being accessed by a computer, such as Read Only Memory (ROM), random Access Memory (RAM), a hard disk 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 transitory electrical or other signals. Non-transitory computer readable media include media that can permanently store data and media that can store and subsequently overwrite data, such as rewritable optical disks or erasable memory devices.

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

Figures 1 through 14, discussed below, and the various embodiments used to describe the principles of the disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will appreciate that the principles of the present disclosure may be implemented in any suitably arranged system or device.

The following documents and standard descriptions are incorporated by reference into the present disclosure as if fully set forth herein: 3GPP TS 36.211v17.0.0, "E-UTRA, physical channels and modulation (E-UTRA, physical channel and modulation)" (herein "REF 1"); 3GPP TS 36.212v17.0.0, "E-UTRA, multiplexing and Channel coding (E-UTRA, multiplexing and channel coding)" (herein "REF 2"); 3GPP TS 36.213v17.0.0, "E-UTRA, physical Layer Procedures (E-UTRA, physical layer procedure)" (herein "REF 3"); 3GPP TS 36.321v17.0.0, "E-UTRA, medium Access Control (MAC) protocol specification (medium access control (MAC) protocol specification)" (herein "REF 4"); 3GPP TS 36.331v17.0.0, "E-UTRA, radio Resource Control (RRC) protocol specification (E-UTRA, radio Resource Control (RRC) protocol Specification)" (herein "REF 5"); 3GPP TR 22.891v14.2.0 (herein "REF 6"); 3GPP TS 38.212v17.0.0, "E-UTRA, NR, multiplexing and channel coding (E-UTRA, NR, multiplexing and channel coding)" (herein "REF 7"); 3GPP TS 38.214v17.0.0, "E-UTRA, NR, physical layer procedures for data (E-UTRA, NR, physical layer process of data)" (herein "REF 8"); and 3GPP TS 38.213v17.0.0, "E-UTRA, NR, physical layer procedures for control (E-UTRA, NR, physical layer process of control) (herein" REF 9 ").

Aspects, features, and advantages of the present disclosure will become apparent from the following detailed description simply by illustrating a number of particular embodiments and implementations, including the best mode contemplated for carrying out the present disclosure. The disclosure is capable of other and different embodiments and its several details are capable of modification in various obvious respects, all without departing from the spirit and scope of the present disclosure. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive. In the figures of the accompanying drawings, the present disclosure is illustrated by way of example, and not by way of limitation.

Hereinafter, for brevity, both FDD and TDD are considered as duplex methods for both DL and UL signaling.

Although the following exemplary description and embodiments assume Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA), the present disclosure may be extended to other OFDM-based transmission waveforms or multiple access schemes, such as filtered OFDM (F-OFDM).

In order to meet the demand for increased wireless data traffic since the deployment of 4G communication systems, efforts have been made to develop improved 5G or front 5G communication systems. Therefore, the 5G or front 5G communication system is also referred to as a "super 4G network" or a "LTE-after-system".

A 5G communication system is considered to be implemented in a higher frequency (mmWave) band (e.g., 60GHz band) in order to achieve higher data rates, or in a lower frequency band (such as below 6 GHz) in order to achieve robust coverage and mobility support. In order to reduce propagation loss of radio waves and increase transmission coverage, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, massive antenna techniques, etc. are discussed in 5G communication systems.

Further, in the 5G communication system, development of system network improvement is underway based on advanced small cells, cloud Radio Access Networks (RANs), ultra dense networks, device-to-device (D2D) communication, wireless backhaul communication, mobile networks, cooperative communication, coordinated multipoint (CoMP) transmission and reception, interference mitigation and cancellation, and the like.

The discussion of the 5G system and the frequency bands associated therewith is for reference as certain embodiments of the present disclosure may be implemented in a 5G system. 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 connection with any frequency band. For example, aspects of the present disclosure may also be applied to 5G communication systems, 6G or even higher versions of deployments that may use terahertz (THz) frequency bands.

Fig. 1-4B below describe various embodiments implemented in a wireless communication system using Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) communication techniques. The descriptions of fig. 1-3 are not meant to imply physical or architectural limitations with respect to the manner in which different embodiments may be implemented. The various embodiments of the present disclosure may be implemented in any suitably arranged communication system. The present disclosure covers several components that may be combined or used in combination with each other or may operate as a stand-alone solution.

Fig. 1 illustrates an example wireless network according to an embodiment of this disclosure. The embodiment of the wireless network shown in fig. 1 is for illustration only. Other embodiments of wireless network 100 may be used without departing from the scope of this disclosure.

As shown in fig. 1, the wireless network includes a gNB 101, a gNB 102, and a gNB 103.gNB 101 communicates with gNB 102 and gNB 103. The gNB 101 is also in communication with at least one network 130, such as the Internet, a proprietary Internet Protocol (IP) network, or other data network.

The gNB 102 provides wireless broadband access to the network 130 for a first plurality of User Equipment (UEs) within the coverage area 120 of the gNB 102. The first plurality of UEs includes: UE 111, which may be located in a small enterprise; UE 112, which may be located in enterprise (E); UE 113, may be located in a WiFi Hotspot (HS); UE 114, which may be located in a first home (R); UE 115, which may be located in a second home (R); and UE 116, which may be a mobile device (M), such as a cellular telephone, wireless laptop, wireless PDA, etc. The gNB 103 provides wireless broadband access to the network 130 for a second plurality of UEs within the coverage area 125 of the gNB 103. The second plurality of UEs includes UE 115 and UE 116. In some embodiments, one or more of the gNBs 101-103 may communicate with each other and with UEs 111-116 using 5G, LTE, LTE-A, wiMAX, wiFi or other wireless communication techniques.

Depending on the network type, the term "base station" or "BS" may refer to any component (or collection of components) configured to provide wireless access to a network, such as a Transmission Point (TP), a transmission-reception point (TRP), an enhanced base station (eNodeB or eNB), a 5G base station (gNB), a macrocell, a femtocell, a WiFi Access Point (AP), or other wireless-enabled device. The base station may provide wireless access according to one or more wireless communication protocols, such as 5G 3GPP new radio interface/access (NR), long Term Evolution (LTE), LTE-advanced (LTE-A), high Speed Packet Access (HSPA), wi-Fi 802.11a/b/g/n/ac, and so on. For convenience, the terms "BS" and "TRP" are used interchangeably in this patent document to refer to the network infrastructure components that provide wireless access to remote terminals. Furthermore, the term "user equipment" or "UE" may refer to any component, such as "mobile station", "subscriber station", "remote terminal", "wireless terminal", "receiving point" or "user equipment" (user device), depending on the type of network, the terms "user equipment" and "UE" being used in this patent document to refer to remote wireless devices of a wireless access BS, whether the UE is a mobile device (such as a mobile phone or a smart phone) or is generally considered to be a stationary device (such as a desktop computer or a vending machine) for convenience.

The dashed lines illustrate the general extent of coverage areas 120 and 125, which are shown as approximately circular for purposes of illustration and explanation only. It should be clearly understood that the coverage areas associated with the gnbs, such as coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on the configuration of the gnbs and the variations in the radio environment associated with the natural and artificial obstructions.

As described in more detail below, one or more of UEs 111-116 include circuitry, programming, or a combination thereof for: receiving configuration information regarding Channel State Information (CSI) reports, the configuration information comprising codebook parameters (M, α, β), wherein: m is the number of frequency domain basis vectors, α is a number equal to or less than 1, and β is a number equal to or less than 1; identifying values M, α, and β; determining a value K based on alpha ₁ Wherein K is ₁ A number of CSI reference signal (CSI-RS) ports selected from the total P CSI-RS ports; determining a maximum number of non-zero coefficients based on β; based on M, K ₁ Determining a CSI report by a maximum number of non-zero coefficients and a value of (2); and transmitting CSI, and one or more of the gnbs 101 to 103 includes circuitry, programming, or a combination thereof for generating configuration information regarding Channel State Information (CSI) reports, the configuration information including codebook parameters (M, α, β), wherein: m is the number of frequency domain basis vectors, α is a number equal to or less than 1, and β is a number equal to or less than 1; configuration information about the CSI report is transmitted, And receiving a CSI report, wherein the CSI report is based on the value M, K ₁ And a maximum number of non-zero coefficients, wherein the maximum number of non-zero coefficients is beta-based, and wherein K ₁ Is based on alpha and is the number of CSI reference signal (CSI-RS) ports selected from a total of P CSI-RS ports.

Although fig. 1 illustrates one example of a wireless network, various changes may be made to fig. 1. For example, the wireless network may include any number of gnbs and any number of UEs in any suitable arrangement. Further, the gNB 101 may communicate directly with any number of UEs and provide these UEs with wireless broadband access to the network 130. Similarly, each gNB102 and 103 may communicate directly with the network 130 and provide the UE with direct wireless broadband access to the network 130. Furthermore, the gnbs 101, 102, and/or 103 may provide access to other or additional external networks, such as external telephone networks or other types of data networks.

Fig. 2 illustrates an example gNB102 in accordance with embodiments of the disclosure. The embodiment of the gNB102 illustrated in fig. 2 is for illustration only, and the gnbs 101 and 103 of fig. 1 may have the same or similar configuration. However, there are a variety of configurations of the gnbs, and fig. 2 does not limit the scope of the disclosure to any particular implementation of the gnbs.

As shown in fig. 2, the gNB 102 includes a plurality of antennas 205a through 205n, a plurality of RF transceivers 210a through 210n, transmit (TX) processing circuitry 215, and Receive (RX) processing circuitry 220. The gNB 102 also includes a controller/processor 225, memory 230, and a backhaul or network interface 235.

RF transceivers 210a through 210n receive incoming RF signals, such as signals transmitted by UEs in network 100, from antennas 205a through 205 n. The RF transceivers 210a to 210n down-convert the incoming RF signals to generate IF or baseband signals. The IF or baseband signal is sent to RX processing circuit 220, and RX processing circuit 220 generates a processed baseband signal by filtering, decoding, and/or digitizing the baseband or IF signal. The RX processing circuit 220 transmits the processed baseband signals to the controller/processor 225 for further processing.

TX processing circuitry 215 receives analog or digital data (such as voice data, web data, email, or interactive video game data) from controller/processor 225. TX processing circuitry 215 encodes, multiplexes, and/or digitizes the outgoing baseband data to generate a processed baseband or IF signal. RF transceivers 210a through 210n receive outgoing processed baseband or IF signals from TX processing circuitry 215 and up-convert the baseband or IF signals to RF signals for transmission via antennas 205a through 205 n.

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, controller/processor 225 may control the reception of UL channel signals and the transmission of DL channel signals by RF transceivers 210a through 210n, RX processing circuitry 220, and TX processing circuitry 215 according to well-known principles. The controller/processor 225 may also support additional functions, such as higher-level wireless communication functions.

For example, the controller/processor 225 may support a beamforming or directional routing operation in which outgoing signals from the plurality of antennas 205a through 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.

The controller/processor 225 is also capable of executing programs and other processes residing in memory 230, such as an OS. Controller/processor 225 may move data into and out of memory 230 as needed to perform the process.

The controller/processor 225 is also coupled to a backhaul or network interface 235. Backhaul or network interface 235 allows gNB 102 to communicate with other devices or systems through a backhaul connection or network. The interface 235 may 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, LTE or LTE-a), the interface 235 may allow the gNB 102 to communicate with other gnbs over a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the interface 235 may allow the gNB 102 to communicate with a larger network (such as the internet) through a wired or wireless local area network or through a wired or wireless connection. Interface 235 includes any suitable structure that supports communication over a wired or wireless connection, such as an ethernet or RF transceiver.

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

Although fig. 2 illustrates one example of the gNB 102, various changes may be made to fig. 2. For example, the gNB 102 may include any number of each of the components shown in FIG. 2. As a particular example, an access point may include multiple interfaces 235 and the controller/processor 225 may support routing functions to route data between different network addresses. As another particular example, while shown as including a single instance of TX processing circuitry 215 and a single instance of RX processing circuitry 220, the gNB 102 may include a respective plurality of instances (such as one instance per RF transceiver). Furthermore, the various components in fig. 2 may be combined, further subdivided, or omitted, and additional components may be added according to particular needs.

Fig. 3 illustrates an example UE 116 according to an embodiment of this disclosure. The embodiment of UE 116 illustrated in fig. 3 is for illustration only, and UEs 111-115 of fig. 1 may have the same or similar configuration. However, there are a variety of configurations for the UE, and fig. 3 does not limit the scope of the present disclosure to any particular implementation of the UE.

As shown in fig. 3, UE 116 includes an antenna 305, a Radio Frequency (RF) transceiver 310, TX processing circuitry 315, a microphone 320, and Receive (RX) processing circuitry 325.UE 116 also includes speaker 330, processor 340, input/output (I/O) Interface (IF) 345, touch screen 350, display 355, and memory 360. Memory 360 includes an Operating System (OS) 361 and one or more applications 362.

RF transceiver 310 receives incoming RF signals from antenna 305 that are transmitted by the gNB of network 100. The RF transceiver 310 down-converts an incoming RF signal to generate an Intermediate Frequency (IF) or baseband signal. The IF or baseband signal is sent to RX processing circuit 325 and RX processing circuit 220 generates a processed baseband signal by filtering, decoding, and/or digitizing the baseband or IF signal. RX processing circuit 325 sends the processed baseband signals to speaker 330 (such as for voice data) or to processor 340 for further processing (such as for web browsing data).

TX processing circuitry 315 receives analog or digital voice data from microphone 320 or other outgoing baseband data (such as web data, email, or interactive video game data) from processor 340. TX processing circuitry 315 encodes, multiplexes, and/or digitizes the outgoing baseband data to generate a processed baseband or IF signal. RF transceiver 310 receives an outgoing processed baseband or IF signal from TX processing circuitry 315 and up-converts the baseband or IF signal to an RF signal that is transmitted via antenna 305.

Processor 340 may include one or more processors or other processing devices and execute OS 361 stored in memory 360 to control the overall operation of UE 116. For example, processor 340 may control the reception of DL channel signals and the transmission of UL channel signals by RF transceiver 310, RX processing circuit 325, and TX processing circuit 315 in accordance with well-known principles. In some embodiments, processor 340 includes at least one microprocessor or microcontroller.

Processor 340 is also capable of executing other processes and programs resident in memory 360, such as processes for receiving configuration information regarding Channel State Information (CSI) reports, including codebook parameters (M, α, β), where: m is the number of frequency domain basis vectors, α is a number equal to or less than 1, and β is a number equal to or less than 1; identifying values M, α, and β; determining a value K based on alpha ₁ Wherein K is ₁ A number of CSI reference signal (CSI-RS) ports selected from the total P CSI-RS ports; determining a maximum number of non-zero coefficients based on β; based on M, K ₁ Determining a CSI report by a maximum number of non-zero coefficients and a value of (2); and transmitting the CSI report. Processor 340 may move data into and out of memory 360 as needed to perform the process. In some embodiments, the processor 340 is configured to execute the application 362 based on the OS 361 or in response to a signal received from the gNB or operator. The processor 340 is also coupled to an I/O interface 345, the I/O interface 345 providing connectivity to the UE 116 with other devices (such as laptop computers and handheld computing devices Machine) capability. I/O interface 345 is the communication path between these accessories and processor 340.

Processor 340 is also coupled to touch screen 350 and display 355. An operator of UE 116 may input data to UE 116 using touch screen 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 from a website.

Memory 360 is coupled to processor 340. A portion of memory 360 may include Random Access Memory (RAM) and another portion of memory 360 may include flash memory or other Read Only Memory (ROM).

Although fig. 3 illustrates one example of the UE 116, various changes may be made to fig. 3. For example, the various components in FIG. 3 may be combined, further subdivided, or omitted, and additional components may be added according to particular needs. As a particular example, the 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). Furthermore, although fig. 3 illustrates the UE 116 configured as a mobile phone or smartphone, the UE may be configured to operate as other types of mobile or stationary devices.

Fig. 4A is a high-level schematic diagram of a transmit path circuit. For example, the transmit path circuitry may be used for Orthogonal Frequency Division Multiple Access (OFDMA) communications. Fig. 4B is a high-level schematic diagram of a receive path circuit. For example, the receive path circuitry may be used for Orthogonal Frequency Division Multiple Access (OFDMA) communications. In fig. 4A and 4B, for downlink communications, the transmit path circuitry may be implemented in the base station (gNB) 102 or relay station, while the receive path circuitry may be implemented in a user equipment (e.g., user equipment 116 of fig. 1). In other examples, for uplink communications, the receive path circuitry 450 may be implemented in a base station (e.g., the gNB 102 of fig. 1) or a relay station, while the transmit path circuitry may be implemented in a user equipment (e.g., the user equipment 116 of fig. 1).

The transmit path circuitry includes a channel coding and modulation block 405, a serial-to-parallel (S-to-P) block 410, an Inverse Fast Fourier Transform (IFFT) block 415 of size N, a parallel-to-serial (P-to-S) block 420, an add cyclic prefix block 425, and an up-converter (UC) 430. The receive path circuitry 450 includes a down-converter (DC) 455, a remove cyclic prefix block 460, a serial-to-parallel (S-to-P) block 465, a Fast Fourier Transform (FFT) block 470 of size N, a parallel-to-serial (P-to-S) block 475, and a channel decode and demodulate block 480.

At least some of the components in fig. 4a 400 and 4b 450 may be implemented in software, while other components may be implemented by configurable hardware or a mix of software and configurable hardware. In particular, it should be noted that the FFT blocks and IFFT blocks described in this disclosure document may be implemented as configurable software algorithms, wherein the value of size N may be modified depending on the implementation.

Furthermore, while the present disclosure is directed to embodiments implementing a fast fourier transform and an inverse fast fourier transform, this is merely exemplary and should not be construed as limiting the scope of the present disclosure. It will be appreciated that in alternative embodiments of the present disclosure, the fast fourier transform function and the inverse fast fourier transform function may be readily replaced by a Discrete Fourier Transform (DFT) function and an Inverse Discrete Fourier Transform (IDFT) function, respectively. It will be appreciated that the value of the N variable may be any integer (i.e., 1, 4, 3, 4, etc.) for DFT and IDFT functions, and any integer (i.e., 1, 2, 4, 8, 16, etc.) that is a power of 2 for FFT and IFFT functions.

In transmit path circuitry 400, a channel coding and modulation block 405 receives a set of information bits, applies a coding (e.g., LDPC coding) and modulates (e.g., quadrature Phase Shift Keying (QPSK) or Quadrature Amplitude Modulation (QAM)) input bits to produce a sequence of frequency domain modulation symbols. The serial-to-parallel block 410 converts (i.e., demultiplexes) the serial modulation symbols into parallel data to produce N parallel symbol streams, where N is the IFFT/FFT size used in the BS102 and UE 116. The IFFT block 415 of size N then performs an IFFT operation on the N parallel symbol streams to produce a time domain output signal. Parallel-to-serial block 420 converts (i.e., multiplexes) the parallel time-domain output symbols from IFFT block 415 of size N to produce a serial time-domain signal. The cyclic prefix block 425 is added and then the cyclic prefix is inserted into the time domain signal. Finally, up-converter 430 modulates (i.e., 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.

The transmitted RF signals arrive at the UE 116 after passing through the wireless channel and perform the inverse operation of the operation at the gNB 102. The down converter 455 down converts the received signal to baseband frequency and removes the cyclic prefix block 460 and removes the cyclic prefix to produce a serial time domain baseband signal. Serial-to-parallel block 465 converts the time-domain baseband signal into a parallel time-domain signal. The FFT block 470 of size N then performs an FFT algorithm to produce N parallel frequency domain signals. Parallel-to-serial block 475 converts the parallel frequency-domain signal into a sequence of modulated data symbols. Channel decode and demodulate block 480 demodulates and then decodes the modulated symbols to recover the original input data stream.

Each of the gnbs 101 to 103 may implement a transmission path similar to that transmitted to the user equipments 111 to 116 in the downlink, and may implement a reception path similar to that received from the user equipments 111 to 116 in the uplink. Similarly, each of the user equipments 111 to 116 may implement a transmission path corresponding to an architecture for transmitting to the gnbs 101 to 103 in the uplink, and may implement a reception path corresponding to an architecture for receiving from the gnbs 101 to 103 in the downlink.

5G communication system use cases have been identified and described. These use cases can be roughly divided into three different groups. In one example, an enhanced mobile broadband (eMBB) is determined to have high bit/second requirements with less stringent latency and reliability requirements. In another example, ultra-reliable and low latency (URLL) is determined with less stringent bit/second requirements. In yet another example, large-scale machine type communication (mctc) is determined as a number of devices per km2 may be as high as 100,000 to 100 tens of thousands, but reliability/throughput/delay requirements may be less stringent. Such a scenario may also involve power efficiency requirements, as battery consumption may be minimized as much as possible.

The communication system includes a Downlink (DL) transmitting signals from a transmission point such as a Base Station (BS) or a NodeB to a User Equipment (UE), and an Uplink (UL) transmitting signals from the UE to a reception point such as the NodeB. The UE, also commonly referred to as a terminal or mobile station, may be fixed or mobile and may be a cellular telephone, a personal computer device or an automated device. An eNodeB, which is typically a fixed station, may also be referred to as an access point or other equivalent terminology. For LTE systems, the NodeB is commonly referred to as an eNodeB.

In a communication system such as an LTE system, DL signals may include data signals conveying information content, control signals conveying DL Control Information (DCI), and Reference Signals (RSs), also referred to as pilot signals. The eNodeB transmits data information through a Physical DL Shared Channel (PDSCH). The eNodeB transmits DCI over a Physical DL Control Channel (PDCCH) or Enhanced PDCCH (EPDCCH).

The eNodeB transmits acknowledgement information in a physical hybrid ARQ indicator channel (PHICH) in response to a data Transport Block (TB) transmission from the UE. The eNodeB transmits one or more of a plurality of types of RSs, including UE-Common RSs (CRSs), channel state information RSs (CSI-RSs), or demodulation RSs (DMRSs). The CRS is transmitted over DL system Bandwidth (BW) and may be used by UEs to obtain channel estimates to demodulate data or control information or perform measurements. To reduce CRS overhead, the eNodeB may transmit CSI-RS in the time and/or frequency domain with less density than CRS. The DMRS may be transmitted only in BW of the corresponding PDSCH or EPDCCH, and the UE may use the DMRS to demodulate data or control information in the PDSCH or EPDCCH, respectively. The transmission time interval of the DL channel is called a subframe and may have a duration of, for example, 1 millisecond.

The DL signal also includes the transmission of logical channels carrying system control information. The BCCH is mapped to a transport channel called a Broadcast Channel (BCH) when DL signals convey a Master Information Block (MIB) or to a DL shared channel (DL-SCH) when DL signals convey a System Information Block (SIB). Most of the system information is included in different SIBs transmitted using the DL-SCH. The presence of system information on the DL-SCH in a subframe may be indicated by the transmission of a corresponding PDCCH conveying a codeword with a Cyclic Redundancy Check (CRC) scrambled with a system information RNTI (SI-RNTI). Alternatively, the scheduling information of SIB transmission may be provided in an earlier SIB, and the scheduling information of the first SIB (SIB-1) may be provided by the MIB.

DL resource allocation is performed in units of subframes and a set of Physical Resource Blocks (PRBs). The transmission BW includes frequency resource units called Resource Blocks (RBs). Each RB includesIndividual subcarriers or Resource Elements (REs), such as 12 REs. A unit of one RB on one subframe is called a PRB. For PDSCH transmission BW, for a total +.>RE, can allocate M for UE _PDSCH And RB.

The UL signals may include data signals conveying data information, control signals conveying UL Control Information (UCI), and UL RSs. UL RS includes DMRS and Sounding RS (SRS). The UE transmits the DMRS only in BW of the corresponding PUSCH or PUCCH. The eNodeB may use the DMRS to demodulate the data signal or UCI signal. The UE transmits SRS to provide UL CSI to the eNodeB. The UE transmits data information or UCI through a corresponding Physical UL Shared Channel (PUSCH) or Physical UL Control Channel (PUCCH). If the UE needs to transmit data information and UCI in the same UL subframe, the UE may multiplex both the data information and UCI in PUSCH. UCI includes hybrid automatic repeat request acknowledgement (HARQ-ACK) information indicating correct (ACK) or incorrect (NACK) detection or absence of PDCCH Detection (DTX) of a data TB in a PDSCH, a Scheduling Request (SR) indicating whether a UE has data in a buffer of the UE, a Rank Indicator (RI), and Channel State Information (CSI) enabling an eNodeB to perform link adaptation for PDSCH transmission to the UE. HARQ-ACK information is also transmitted by the UE in response to detecting PDCCH/EPDCCH indicating release of the semi-persistent scheduled PDSCH.

The UL subframe includes two slots. Each time slot includes a data message, UCI, DMRS, or SRS for transmittingAnd a symbol. The frequency resource element of the UL system BW is an RB. For transmitting BW, UE is allocated total +.>N of RE _RB And RB. For PUCCH, N _RB =1. The last subframe symbol may be used to multiplex SRS transmissions from one or more UEs. The number of subframe symbols available for data/UCI/DMRS transmission is +.>Wherein if the last subframe symbol is used for transmitting SRS, N _SRS =1, and otherwise, N _SRS ＝0。

Fig. 5 illustrates a transmitter block diagram 500 of PDSCH in a subframe according to an embodiment of the disclosure. The embodiment of the transmitter block diagram 500 illustrated in fig. 5 is for illustration only. One or more of the components illustrated in fig. 5 may be implemented in dedicated circuitry configured to perform the functions, or one or more of the components may be implemented by one or more processors that execute instructions to perform the functions. Fig. 5 does not limit the scope of the present disclosure to any particular implementation of transmitter block diagram 500.

As shown in fig. 5, information bits 510 are encoded by an encoder 520, such as a turbo encoder, and modulated by a modulator 530, for example using Quadrature Phase Shift Keying (QPSK) modulation. A serial-to-parallel (S/P) converter 540 generates M modulation symbols which are then provided to a mapper 550 to be mapped to REs selected for the assigned PDSCH transmission BW by a transmission BW selection unit 555, a unit 560 applies an Inverse Fast Fourier Transform (IFFT), the output is then serialized by a parallel-to-serial (P/S) converter 570 to create a time domain signal, the filtering is applied by a filter 580 and the signal is transmitted 590. Additional functions, such as data scrambling, cyclic prefix insertion, time windowing, interleaving, etc., are well known in the art and are not shown for the sake of brevity.

Fig. 6 illustrates a receiver block diagram 600 of PDSCH in a subframe according to an embodiment of the disclosure. The embodiment of diagram 600 illustrated in fig. 6 is for illustration only. One or more of the components illustrated in fig. 6 may be implemented in dedicated circuitry configured to perform the functions, or one or more of the components may be implemented by one or more processors that execute instructions to perform the functions. Fig. 6 is not intended to limit the scope of the present disclosure to any particular implementation of diagram 600.

As shown in fig. 6, the received signal 610 is filtered by a filter 620, REs 630 for assigned received BW are selected by a BW selector 635, a unit 640 applies a Fast Fourier Transform (FFT), and the output is serialized by a parallel-to-serial converter 650. Subsequently, demodulator 660 coherently demodulates the data symbols by applying channel estimates obtained from the DMRS or CRS (not shown), and decoder 670, such as a turbo decoder, decodes the demodulated data to provide estimates of information data bits 680. For simplicity, additional functionality such as time window, cyclic prefix removal, descrambling, channel estimation and deinterleaving are not shown.

Fig. 7 illustrates a transmitter block diagram 700 of PUSCH in a subframe in accordance with an embodiment of the disclosure. The embodiment of block diagram 700 illustrated in fig. 7 is for illustration only. One or more of the components illustrated in fig. 5 may be implemented in dedicated circuitry configured to perform the functions, or one or more of the components may be implemented by one or more processors that execute instructions to perform the functions. Fig. 7 does not limit the scope of the present disclosure to any particular implementation of block diagram 700.

As shown in fig. 7, information data bits 710 are encoded by an encoder 720 (such as a turbo encoder) and modulated by a modulator 730. Discrete Fourier Transform (DFT) unit 740 applies DFT to the modulated data bits, RE 750 corresponding to the allocated PUSCH transmission BW is selected by transmission BW selection unit 755, unit 760 applies IFFT, and after cyclic prefix insertion (not shown), filtering is applied by filter 770, and the signal is transmitted 780.

Fig. 8 illustrates a receiver block diagram 800 of PUSCH in a subframe according to an embodiment of the disclosure. The embodiment of block diagram 800 illustrated in fig. 8 is for illustration only. One or more of the components illustrated in fig. 8 may be implemented in dedicated circuitry configured to perform the functions, or one or more of the components may be implemented by one or more processors that execute instructions to perform the functions. Fig. 8 is not intended to limit the scope of the present disclosure to any particular implementation of block diagram 800.

As shown in fig. 8, the received signal 810 is filtered by a filter 820. Subsequently, after the cyclic prefix is removed (not shown), element 830 applies an FFT, REs 840 corresponding to the assigned PUSCH reception BW are selected by reception BW selector 845, element 850 applies an Inverse DFT (IDFT), demodulator 860 coherently demodulates the data symbols by applying channel estimates obtained from the DMRS (not shown), and a decoder (such as a turbo decoder) decodes the demodulated data to provide estimates of information data bits 880.

In the next generation cellular system, various use cases other than the LTE system capability are envisaged. The term 5G or fifth generation cellular systems, systems capable of operating below 6GHz and above 6GHz (e.g., under mmWave systems) are one of the requirements. In 3GPP TR 22.891, 74 5G use cases have been identified and described; these use cases can be roughly divided into three different groups. The first group is called "enhanced mobile broadband (eMBB)", for high data rate services with less stringent latency and reliability requirements. The second group is called "Ultra Reliable Low Latency (URLL)", for applications where the data rate requirements are less stringent but the delay tolerance is lower. The third group is called "large-scale MTC (mctc)", for a large number of low power device connections with less stringent reliability, data rate and delay requirements, such as 100 tens of thousands per km ² 。

The 3GPP NR specifications support up to 32 CSI-RS antenna ports that enable the gNB to be equipped with a large number of antenna elements (such as 64 or 128). In this case, a plurality of antenna elements are mapped onto one CSI-RS port. The maximum number of CSI-RS ports may remain the same or may be increased for next generation cellular systems such as 5G.

Fig. 9 illustrates an example antenna block or array 900 according to an embodiment of this disclosure. The embodiment of the antenna block or array 900 illustrated in fig. 9 is for illustration only. Fig. 9 is not intended to limit the scope of the present disclosure to any particular implementation of antenna block or array 900.

For the mmWave band, although the number of antenna elements may be greater for a given form factor, the number of CSI-RS ports (which may correspond to the number of digital pre-coding ports) tends to be limited due to hardware limitations (such as the possibility of installing a large number of ADCs/DACs at mmWave frequencies), as illustrated in fig. 9. In this case, one CSI-RS port is mapped onto a large number of antenna elements that can be controlled by a set of analog phase shifters 901. One CSI-RS port may then correspond to one sub-array that produces a narrow analog beam by analog beamforming 905. The analog beam may be configured to sweep a wider range of angles (920) by changing the set of phase shifters across symbols or subframes. The number of subarrays (equal to the number of RF chains) and the number of CSI-RS ports N _CSI-PORT The same applies. Digital beamforming unit 910 spans N _CSI-PORT The analog beams perform linear combining to further increase the precoding gain. Although the analog beams are wideband (and thus not frequency selective), the digital precoding may vary by frequency subbands or resource blocks.

To achieve digital precoding, efficient design of CSI-RS is a key factor. Thus, three types of CSI reporting mechanisms corresponding to three types of CSI-RS measurement behaviors are supported, e.g., a "category a" CSI report corresponding to a non-precoded CSI-RS, a "category B" report corresponding to a UE-specific beamformed CSI-RS with k=1 CSI-RS resources, and a "category B" report corresponding to a cell-specific beamformed CSI-RS with K > 1 CSI-RS resources.

For non-precoded (NP) CSI-RS, a cell-specific one-to-one mapping between CSI-RS ports and TXRUs is utilized. Different CSI-RS ports have the same wide beamwidth and direction and thus typically have cell wide coverage. For beamformed CSI-RS, cell-specific or UE-specific beamforming operations are applied on non-zero power (NZP) CSI-RS resources (e.g., comprising multiple ports). At least at a given time/frequency, and at least from the perspective of the gNB, the CSI-RS ports have a narrow beamwidth and are therefore not cell-wide coverage. At least some of the CSI-RS port resource combinations have different beam directions.

In a scenario where DL long-term channel statistics can be measured by UL signals at the serving eNodeB, UE-specific BF CSI-RS can be easily used. This is generally possible when the UL-DL duplex distance is sufficiently small. However, when this condition is not met, some UE feedback is necessary for the eNodeB to obtain an estimate of DL long-term channel statistics (or any representation thereof). To facilitate this process, a first BF CSI-RS transmitted with a period T1 (ms) and a second NP CSI-RS transmitted with a period T2 (ms) (where T1. Ltoreq.T2). This method is called hybrid CSI-RS. The implementation of hybrid CSI-RS depends largely on the definition of CSI processes and NZP CSI-RS resources.

In the 3GPP LTE specifications, MIMO has been identified as a fundamental feature to achieve high system throughput requirements and will continue to be the same in NR. One of the key components of the MIMO transmission scheme is accurate CSI acquisition at the eNB (or TRP). In particular, for MU-MIMO, the availability of accurate CSI is necessary in order to guarantee high MU performance. For a TDD system, CSI may be obtained using SRS transmission that relies on channel reciprocity. On the other hand, for FDD systems, CSI may be acquired using CSI-RS transmissions from the eNB and CSI acquisition and feedback from the UE. In a conventional FDD system, the CSI feedback framework is 'implicit' in the form of CQI/PMI/RI, which is derived from the codebook assuming SU transmissions from the eNB. This implicit CSI feedback is not sufficient for MU transmission due to SU assumptions inherent in deriving CSI. Since future (e.g., NR) systems may be more MU-centric, this SU-MUCSI mismatch will be a bottleneck to achieve high MU performance gain. Another problem with implicit feedback is scalability with a large number of antenna ports at the eNB. Codebook designs for implicit feedback are quite complex for a large number of antenna ports, and the designed codebook cannot be guaranteed to bring reasonable performance benefits in an actual deployment scenario (e.g., at most only a small percentage of gain can be shown).

In 5G or NR systems, the CSI reporting paradigm from LTE described above is also supported and is referred to as type I CSI reporting. In addition to type I, is called type IICSHigh resolution CSI reporting of I reporting is also supported to provide more accurate CSI information to the gNB for use cases such as high order MU-MIMO. The overhead of type IICSI reporting may be a problem in actual UE implementations. One approach to reducing type IICSI overhead is based on Frequency Domain (FD) compression. In release 16NR, DFT-based FD compression of type IICSI has been supported (referred to as release 16 enhanced type II codebook in REF 8). Some key components of the feature include (a) Spatial Domain (SD) basis W ₁ (b) FD group W _f And (c) linearly combining the coefficients of SD and FD groupsIn a non-reciprocal FDD system, the UE needs to report full CSI (including all components). However, when there is indeed reciprocity or partial reciprocity between UL and DL, then some of the CSI components may be obtained based on the UL channel estimated using SRS transmission from the UE. In release 16NR, DFT-based FD compression is extended to this partial reciprocity case (called release 16 enhanced type II port selection codebook in REF 8), where W ₁ The DFT-based SD base in (1) is replaced by SD CSI-RS port selection, i.e., the +.>L of the CSI-RSs are selected (the selection is common to both antenna polarizations or halves of the CSI-RS ports). In this case, the CSI-RS ports are beamformed in SD (assuming UL-DL channel reciprocity in the angle domain), and the beamforming information may be obtained at the gNB based on the UL channel estimated using SRS measurements.

It is known in the literature that UL-DL channel reciprocity exists in both the angle domain and the delay domain if the UL-DL duplex distance is small. Version 16 enhanced type II port selection may be further extended to both the angle domain and the delay domain (or SD and FD) due to the delayed transformation in the time domain (or closely related) to the basis vector in the Frequency Domain (FD). In particular, W ₁ DFT-based SD base and W in (1) _f The DFT-based FD base in (a) may be replaced by SD and FD port selection, i.e., L CSI-RS ports are selected in SD and/orM ports are selected in the FD. In this case, the CSI-RS ports are beamformed in SD (assuming UL-DL channel reciprocity in the angle domain) and/or FD (assuming UL-DL channel reciprocity in the delay/frequency domain), and the corresponding SD and/or FD beamforming information may be obtained at the gNB based on the UL channel estimated using SRS measurements. The present disclosure provides some design components of such codebooks.

All of the following components and embodiments are applicable to UL transmissions with CP-OFDM (cyclic prefix OFDM) waveforms, DFT-SOFDM (DFT-spread OFDM) and SC-FDMA (single carrier FDMA) waveforms. Furthermore, when the scheduling unit in time is one subframe (which may consist of one or more slots) or one slot, all the following components and embodiments are applicable to UL transmission.

In the present disclosure, the frequency resolution (reporting granularity) and span (reporting bandwidth) of CSI reporting may be defined in terms of frequency "subbands" and "CSI reporting bands" (CRBs), respectively.

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

The "CSI reporting band" is defined as a set/aggregate 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 a "partial band".

The term "CSI reporting band" is used only as an example of the representation function. Other terms such as "CSI reporting subband set" or "CSI reporting bandwidth" may also be used.

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 configured with multiple (N) CSI reporting bands (e.g., via RRC signaling), the UE may report CSI associated with n+.n CSI reporting bands. For example, a large system bandwidth of > 6GHz may require 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 the recommended value of n via the UL channel.

Thus, the CSI parameter frequency granularity may be defined as follows for each CSI reporting band. When one CSI parameter is used for all M in the CSI reporting band _n With subbands, the CSI parameters are configured for having M _n "Single" reporting of the CSI reporting bands for the subbands. When one CSI parameter is reported for each of the Mn subbands in the CSI reporting band, the CSI parameter is configured with a "subband" for the CSI reporting band having Mn subbands.

Fig. 10 illustrates an example antenna port layout 1000 in accordance with an embodiment of the present disclosure. The embodiment of the antenna port layout 1000 illustrated in fig. 10 is for illustration only. Fig. 10 is not intended to limit the scope of the present disclosure to any particular implementation of antenna port layout 1000.

As illustrated in fig. 10, N ₁ And N ₂ Which is the number of antenna ports having the same polarization in the first and second dimensions, respectively. For 2D antenna port layout, N ₁ ＞1，N ₂ > 1, and for 1D antenna port layout, N ₁ > 1 and N ₂ =1. Thus, for a dual polarized antenna port layout, the total number of antenna ports is 2N ₁ N ₂ 。

As described in U.S. patent No. 10,659,118 entitled "Method and Apparatus for Explicit CSI Reporting in Advanced Wireless Communication Systems (method and apparatus for explicit CSI reporting in advanced wireless communication systems)" issued by month 5 and 19 of 2020, which is incorporated herein by reference in its entirety, a UE is configured with high resolution (e.g., type II) CSI reporting, wherein a linear combination based type IICSI reporting framework is extended to include frequency dimensions in addition to first and second antenna port dimensions.

Fig. 11 illustrates a 3D grid 1100 of oversampled DFT beams (1 st port dimension, 2 nd port dimension, frequency dimension), wherein

The first dimension is associated with a first port dimension,

the second dimension is associated with a second port dimension, and

the third dimension is associated with the frequency dimension.

The base sets represented for the first and second port fields are of length N, respectively ₁ And has a length of N ₂ And respectively have an oversampling factor of O ₁ And O ₂ Is used for the oversampled DFT codebook. Also, the basis set for the frequency domain representation (i.e., 3 rd dimension) is of length N ₃ And has an oversampling factor of O ₃ Is used for the oversampled DFT codebook. In one example, O ₁ ＝O ₂ ＝O ₃ =4. In another example, the oversampling factor O _i Belonging to {2,4,8}. In yet another example, O ₁ 、O ₂ And O ₃ Is higher layer configured (via RRC signaling).

As explained in section 5.2.2.2.6 of REF8, the UE is configured with a higher layer parameter codebook type set to 'typeII-PortSelection-r16' for enhanced type II CSI reporting, where all SBs and given layers l=1, where the precoder of v (where v is the associated RI value) is given by one of the following formulas

Or (b)

Wherein, the liquid crystal display device comprises a liquid crystal display device,

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

·N ₂ is an antenna in a second antenna port dimensionThe number of ports (with the same antenna polarization),

·P _CSI-RS Is the number of CSI-RS ports configured to the UE,

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

·a _i is 2N ₁ N ₂ X 1 (equation 1) or (equation 2) column vector, and if the antenna ports at gNB are co-polarized, a _i Is N ₁ N ₂ X 1 orThe port selects a column vector and is 2N if the antenna port at gNB is dual polarized or cross polarized ₁ N ₂ X 1 or P _CSIRS X 1 port selection column vector, where port selection vector is defined as a vector containing a value of 1 in one element and a value of 0 elsewhere, and P _CSIRS Is the number of CSI-RS ports configured for CSI reporting,

·b _f is N ₃ The x 1 column of vectors is used,

·c _l,i,f is the sum of the vectors a _i And b _f The associated complex coefficients.

In a variant, when the UE reports a subset K < 2LM coefficients (where K is fixed, configured by the gNB, or reported by the UE), then coefficient c in equation 1 or 2 of the precoder equation _l,i,f Quilt x _l,i,f ×c _l,i,f Alternatively, wherein

If coefficient c _l,i,f Reported by the UE according to some embodiments of the invention, x is then _l,i,f ＝1。

Otherwise (i.e. c _l,i,f Not reported by UE), x _l,i,f ＝0。

x _l,i,f The indication of =1 or 0 is according to some embodiments of the invention. For example, the indication may be via a bitmap.

In a variant, equation 1 or equation 2 of the precoder equation, respectively, is generalized to

And is also provided with

Wherein for a given i the number of basis vectors is M _i And 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 Wherein M is _i M.ltoreq.M (wherein { M) _i Either } or sigma M _i Fixed, configured by the gNB, or reported by the UE).

W ^l Is normalized to a norm one. For rank R or R layers (v=r), the precoding matrix is composed ofGiven. Equation 2 is assumed in the remainder of this disclosure. However, embodiments of the present disclosure are general and also apply to equations 1, 3 and 4.

Here the number of the elements to be processed is,and M is less than or equal to N ₃ . If->A is the identity matrix and is therefore not reported. Also, if m=n ₃ B is the identity matrix and is therefore not reported. In the example, assume M < N ₃ To report the columns of B, an oversampled DFT codebook is used. For example, b _f ＝w _f Wherein the number w _f This is given by:

when O is ₃ When=1, the FD basis vector of layer l e { 1..v }, where v is RI or rank value, is given by

Wherein, the liquid crystal display device comprises a liquid crystal display device,and->Wherein (1)>

In another example, a Discrete Cosine Transform (DCT) basis is used to construct/report a third dimension of basis B. The mth column of the DCT compression matrix is simply given by

And k=n ₃ And m=0, …, N ₃ -1。

Since the DCT is applied to real-valued coefficients, the DCT is applied to real and imaginary components (of the channel or channel feature vector), respectively. Alternatively, the DCT is applied to the magnitude and phase components (of the channel or channel feature vector), respectively. The use of DFT or DCT basis is for illustration purposes only. The present disclosure is applicable to constructing/reporting any other basis vector of a and B.

At a high level, precoder W ^l Can be described as follows.

Wherein a=W ₁ Corresponding to type IICSI codebook REF8]Version 15W of (V) ₁ And b=w _f 。

The matrix consists of all the required linear combination coefficients (e.g. amplitude and phase or real or imaginary numbers). />Each of the report coefficients (c _l,i,f ＝p _l,i,f φ _l,i,f ) Quantized into amplitude coefficients (p _l,i,f ) And phase coefficient (phi) _l,i,f ). In one example, the amplitude coefficient (p _l,i,f ) Reported using an a-bit amplitude codebook, where a belongs to {2,3,4}. If multiple values for A are supported, one value is configured via higher layer signaling. In another example, the amplitude coefficient (p _lif ) Reported as +.>Wherein, the liquid crystal display device comprises a liquid crystal display device,

·is a reference or first amplitude reported using an A1 bit amplitude codebook, where A1 belongs to {2,3,4}, and

·Is a differential amplitude or second amplitude reported using an A2 bit amplitude codebook, where A2. Ltoreq.A1 belongs to {2,3,4}.

For layer L, the Linear Combination (LC) coefficients associated with the Spatial Domain (SD) basis vector (or beam) i ε {0,1, …,2L-1} and the Frequency Domain (FD) basis vector or (beam) f ε {0,1, …, M-1} are denoted as c _l,i,f And the strongest coefficient is expressed asThe strongest coefficient is from the usage bitmapReported K _NZ Reported in non-zero (NZ) coefficients, wherein,and β is higher level configuration. Remaining 2LM-K not reported by UE _NZ The coefficients are assumed to be zero. The following quantization scheme is used for quantizing/reporting K _NZ And NZ coefficients.

The UE reports the following forQuantization of NZ coefficients in (a):

index (i) for strongest coefficient ^* ,f ^* ) An X-bit indicator of (c), wherein,or->

The strongest coefficient(thus its amplitude/phase is not reported)

Two antenna polarization specific reference amplitudes are used.

For and strongest coefficientThe associated polarization due to the reference amplitude +.>And is therefore not reported

For another polarization, reference amplitudeQuantized to 4 bits

4-bit amplitude alphabet is

For { c ] _l,i,f ,(i,f)≠(i ^* ,f ^* )}：

For each polarization, a differential amplitude calculated with respect to the associated polarization-specific reference amplitude and quantized to a coefficient of 3 bits

3-bit amplitude alphabet is

Annotation: final quantized amplitude p _l,i,f From the following componentsGive out

Each phase is quantized to 8PSK (N _ph =8) or 16PSK (N _ph =16) (this is configurable).

For the strongest coefficient c _l,i*,f* Associated polarization r ^* E {0,1}, so thatAnd reference amplitudeR.epsilon {0,1} and r.noteq.r for other polarizations ^* So that->And reference amplitude +.>Quantized (reported) using the 4-bit amplitude codebook described above. />

The UE may be configured to report M FD base vectors. In one example of this, in one implementation,wherein R isIs configured according to {1,2} higher layers, and p is according to +.>Configured at a higher level. In one example, the p value is configured higher layer for rank 1-2CSI reporting. For ranks > 2 (e.g., ranks 3 and 4), the p value (by v ₀ Representation) may be different. In one example, for ranks 1-4, (p, v) ₀ ) Is according to->Jointly configured, i.e. for rank 1-2 +>And +.about.4 for rank 3-4>In one example, N ₃ ＝N _sB X R, where N _SB Is the number of SBs used for CQI reporting. In the remainder of this disclosure, M is M _υ Instead, to show its dependence on rank value v, p is therefore p _υ V.epsilon.1, 2 substitutions and v ₀ Is p _υ V.epsilon.3, 4 instead.

The UE may be configured to freely (independently) slave N for each layer l e {0,1, & gt, v-1} of rank v CSI report ₃ Reporting M in one step in a basis vector _υ FD basis vectors. Alternatively, the UE may be configured to report M in two steps as follows _υ FD basis vectors.

In step 1, N 'is included' ₃ ＜N ₃ An intermediate set of individual basis vectors (InS) is selected/reported, where InS is common to all layers.

In step 2, for each layer l e {0,1,..v-1 } of the rank v CSI report, M FD basis vectors are N 'from InS' ₃ The individual basis vectors are freely (independently) selected/reported.

In one example, when N ₃ At 19 or less, a one-step process is used, and when N ₃ At > 19, a two-step process is used. In one example of this, in one implementation,where α > 1 is fixed (e.g., 2) or configurable.

The codebook parameters used in DFT-based frequency domain compression (equation 5) are (L, p for v e {1,2 }) _υ P for v.epsilon.3, 4 _υ ,β,α,N _p h) A. The invention relates to a method for producing a fibre-reinforced plastic composite In one example, the set of values for these codebook parameters are as follows.

L: in addition to L e 2,4,6 for rank 1-2, 32 CSI-RS antenna ports and r=1,

the value set is typically {2,4}.

P for v.epsilon.1, 2 _υ For v.epsilon. {3,4 })

·

·α∈{1.5,2,2.5,3}

·N _ph ∈{8,16}。

In another example, the set of values for these codebook parameters are as follows: α=2, n _ph =16, and as in table 1, wherein L, β and p _υ Is determined by the higher layer parameter param coding-r 17. In one example, the undesirable UE is configured with a paramCombination-r17 equal to

P when _CSI-RS When=4, 3, 4, 5, 6, 7 or 8,

when the number of CSI-RS ports P _CSI-RS When the ratio is less than 32, 7 or 8,

when the higher layer parameter typeII-RI-distribution-r 17 is configured to be greater than 1 for any i _i When=1, 7 or 8,

when r=2, 7 or 8.

Bitmap parameter typeII-RI-Restriction-r17 forms bit sequence r ₃ ,r ₂ ,r ₁ ,r ₀ Wherein r is ₀ Is LSB and r ₃ Is the MSB. When r is _i When zero, i e {0,1, …,3}, PMI and RI reports are not allowed to correspond to any precoder associated with v=i+1 layers. Parameter R is configured with the higher layer parameter number ofpmisubbandsbaccqisband-R17. The parameter controls the total number N of precoding matrices indicated by the PMI ₃ As a function of the number of subbands in the csi-reporting band, the subband size configured by the higher level parameter subband size, and the total number of PRBs in the bandwidth portion.

TABLE 1

The above framework (equation 5) represents the sum M of 2L SD beams _υ Multiple (N) of linear combinations (double sums) are used for the FD beams ₃ ) Precoding matrix of FD unit. The framework can also be used to control the data by using a TD base matrix W _t Substitute FD matrix W _f To represent a precoding matrix in the Time Domain (TD), where W _t Comprises M representing some form of delay or channel tap position _υ And TD beams. Thus, the precoder W ^l May be described as follows.

In one example, M _υ The TD beams (representing delay or channel tap positions) are derived from N ₃ Selected from a set of TD beams, i.e. N ₃ Corresponds to a maximum number of TD units, where each TD unit corresponds to a delay or channel tap position. In one example, the TD beam corresponds to a single delay or channel tap position. In another example, the TD beams correspond to multiple delay or channel tap positions. In another example, the TD beams correspond to a plurality ofDelay or a combination of channel tap positions.

The remainder of the disclosure applies to the spatial frequency (equation 5) and spatial time (equation 5A) frameworks.

Typically, for layers l=1, …, v, where v is the rank value reported via RI, the precoder (see equations 5 and 5A) comprises some or all of the codebook components summarized in table 2.

Table 2: codebook component

Let P be _CSIRS,SD And P _CSIRS，FD CSI-RS port numbers in SD and FD, respectively. The total number of CSI-RS ports is PC _SIRS，SD ×PC _SIRS，FD ＝PC _SIRS . Each CSI-RS port may be beamformed/precoded using a precoding/beamforming vector in the SD or FD or both the SD and FD. Assuming (partial) reciprocity between DL and UL channels, the precoding/beamforming vectors for each CSI-RS port may be derived based on UL channel estimation via SRS. Since CSI-RS ports may be beam-formed in SD as well as FD, version 15/16 type II port selection codebook may be extended to perform port selection in both SD and FD, then linear combination of selected ports. In the remainder of this disclosure, some details are provided regarding the port selection codebook for this extension.

In the remainder of this disclosure, the terms 'beam' and 'port' are used interchangeably and refer to the same component of the codebook. For brevity, beams/ports or ports/beams are used in this disclosure.

In one embodiment A.1, based on the new (release 17) type II port selection codebook, the UE is configured with higher layer parameters set to 'typeII-PortSelect-r 17' for CSI reportingcodebook type, where the port selections in the version 15/16 type II port selection codebook (in SD) are extended to FD in addition to SD. The UE is also configured with P linked with CSI reporting based on the new type II port selection codebook _CSIRS Multiple CSI-RS ports (either in one CSI-RS resource or distributed over more than one CSI-RS resource). In one example, P _CSIRS =q. In another example, P _CSIRS And (5) not less than Q. Here, q=p _CSIRS，SD ×P _CSIRS，FD . The CSI-RS ports may be beamformed in the SD or/and FD. UE measurement P _CSIRS A number (or at least Q) of CSI-RS ports, estimating a (beamformed) DL channel, and determining a Precoding Matrix Indicator (PMI) using a new port selection codebook, wherein the PMI indication may be used at gNB for each FD unit t e {0, 1.. ₃ -1} construct a set of components S of a precoding matrix (together with beamforming of CSI-RS used for beamforming). In one example, P _CSIRS，SD E {4,8, 12, 16, 32} or {2,4,8, 12, 16, 32}. In one example, P _CSIRS，SD And P _CSIRS，FD So that its product q=p _CSIRS，SD ×P _CSIRS，FD E {4,8, 12, 16, 32} or {2,4,8, 12, 16, 32}.

Fig. 12 illustrates an example of a new port selection codebook that facilitates independent (separate) port selection across SD and FD, and also facilitates joint port selection across SD and FD 1200, according to an embodiment of the present disclosure. The embodiment of the new port selection codebook illustrated in fig. 12 that facilitates independent (separate) port selection across SD and FD and also facilitates joint port selection across SD and FD 1200 is for illustration only. Fig. 12 is not intended to limit the scope of the present disclosure to any particular implementation of an example of a new port selection codebook that facilitates independent (separate) port selection across SDs and FDs, and also facilitates joint port selection across SDs and FDs 1200.

The new port selection codebook facilitates independent (separate) port selection across SD and FD. This is illustrated at the top of fig. 12.

For layer l=1.., v, where v is the rank reported via RI The values, precoder (see equations 5 and 5A) includes the codebook components (indicated via PMI) summarized in table 3. Parameters L and M _l Is fixed or configured (e.g., via RRC).

Table 3: codebook component

In one embodiment a.2, the UE is configured with a higher layer parameter codebook type set to 'typeII-PortSelection-r17' for CSI reporting based on a new (release 17) type II port selection codebook in which the port selections in the release 15/16 type II port selection codebook (in SD) are extended to FD in addition to SD. The UE is also configured with P linked with CSI reporting based on the new type II port selection codebook _CSIRS Multiple CSI-RS ports (either in one CSI-RS resource or distributed over more than one CSI-RS resource). In one example, P _CSIRS =q. In another example, P _CSIRS And (5) not less than Q. Here, q=p _CSIRS，SD ×P _CSIRS，FD . The CSI-RS ports may be beamformed in the SD or/and FD. UE measurement P _CSIRS A number (or at least Q) of CSI-RS ports, estimating a (beamformed) DL channel, and determining a Precoding Matrix Indicator (PMI) using a new port selection codebook, wherein the PMI indication may be used at gNB for each FD unit t e {0, 1.. ₃ -1} construct a set of components S of a precoding matrix (together with beamforming of CSI-RS used for beamforming). In one example, P _CSIRS，SD E {4,8, 12, 16, 32} or {2,4,8, 12, 16, 32}. In one example, P _CSIRS，SD And P _CSIRS，FD So that its product q=p _CSIRS，SD ×P _CSIRS，FD E {4,8, 12, 16, 32} or {2,4,8, 12, 16, 32}.

The new port selection codebook facilitates joint port selection across SD and FD. This is illustrated at the bottom of fig. 14. The codebook structure is similar to a version 15NR type II codebook comprising two principal components.

·W ₁ : from P _CSI-RS Joint selection Y in a pair of SD-FD ports _υ

O in one example, Y v.ltoreq.P _CSI-RS (if the port selection is independent across two polarizations or two groups of antennas with different polarizations)

In one example of this method,(if the port selection is common across two polarizations or two groups of antennas with different polarizations)

·W ₂ : for Y of choice _υ The coefficients are selected for each SD-FD port pair.

In one example, the joint port selection (and its reporting) is common among multiple layers (when v > 1). In one example, the joint port selection (and its reporting) is independent in multiple layers (when v > 1). The reporting of the selected coefficients is independent in multiple layers (when u > 1).

For layer i=1.., v, where v is the rank value reported via RI, the precoder (see equations 5 and 5A) includes codebook components (indicated via PMI) summarized in table 4. Parameter Y _υ Is fixed or configured (e.g., via RRC).

Table 4: codebook component

In one embodiment I, the UE is configured with a higher layer parameter codebook type set to 'typeII-PortSelection-r17' for CSI reporting based on a new (version 17) type II port selection codebook with component W for port selection ₁ (as described in examples A.1 and A.2). With respect to component W ₁ Is according to at least one of the following embodiments.

In one embodiment I.1, the port selection matrix W ₁ Is determined according to at least one of the following examplesAnd (3) determining.

In one example I.1.1, the port selection matrix W ₁ Such that the port selection operation is common across both antenna polarizations (assuming dual polarized antenna ports at the gNB). The first half of the antenna port corresponds to one antenna polarization and the second half of the antenna port corresponds to the other antenna polarization. Since the port selection is common (identical) across both polarizations, the selection comes from Each port (comprising one of two polarizations), and thus W ₁ May be expressed as a block diagonal matrixWherein X is a polypeptide having the size +.>Each column of X is length ++1 with "1" at the entry corresponding to the selected port location and "0" at the remaining entries>Is used to select the vector. It should be noted that when there is an index +.>When the port of (1) is selected, then there is an index +.>The corresponding ports of (2) are also selected because i and +.>Is an index of co-located antenna ports but with different polarizations (e.g., +45 and-45). In one example, port selection block X includes a block corresponding to K ₁ 2 port selection vector { v _m Columns of }, and ∈>Is the set of indices of port selection vectors, where v _m Is in element (m mod P _CSI-RS P containing the value 1 in/2) and 0 elsewhere _CSI-RS Column vector of/2 elements (where the first element is element 0).

In one example I.1.2, the port selection matrix W ₁ So that the port selection operation is independent across both antenna polarizations (assuming dual polarized antenna ports at the gNB). That is, the port selection comes from P _CSIRS Ports, and W ₁ X, where X is of size N _CSIRS ×K ₁ Each column of the port selection matrix is of length N having a "1" at the entry corresponding to the selected port location and a "0" at the remaining entries _CSIRS Select vector x 1. In one example, port selection block X includes a block corresponding to K ₁ Port selection vector v _m Columns of }, andis the set of indices of port selection vectors, where v _m Is in element (m mod P _CSI-RS ) P containing the value 1 and containing 0 elsewhere _CSI-RS An element column vector (where the first element is element 0).

In one example, K ₁ =2l, or equivalently, for example i.1.1,and for example I.1.2, K ₁ =l (see version 15/16 type II and symbols used in enhanced type II codebooks). In one example, K ₁ (or L) is configured to the UE, e.g., via RRC or/and MAC CE or/and DCI. In one example, K ₁ (or L) is reported by U from a set of values (these values may be fixed or configured to the UE or reported by the UE in its capability report). In one example, K is supported by the UE ₁ The set of value(s) of (or L) is reported by the UE in its capability report. In one example, a UE is configured with K subject to UE capability reporting ₁ At least one value of (or L).

In one embodiment I.2, component W ₁ May be turned off (i.e., port selection is not required/reported) or turned on (port selection is reported). When turned off, W ₁ May be a fixed matrix, e.g., N _CSIRS ×N _CSIRS Identity matrix (implication K) ₁ ＝P _CSIRS And all ports selected), where N _CSIRS Is the number of CSI-RS ports that PMI reports are configured across (within one NZP CSI-RS resource or across multiple NZP CS-RS resources). In one example, when K ₁ ＝αP _CSIRS When port selection is closed by setting/configuring α=1. At least one of the following examples is used/configured for closing/opening.

In one example I.2.1, component W ₁ Is turned off/on via dedicated (explicit) signaling. For example, higher layer parameters may be used to turn off/on (e.g., α=1). Or, an indication based on MAC CE may be used for off/on. Or, a DCI-based indication may be used for turning off/on. Furthermore, dedicated parameters/fields are used for this signaling, or signaling is combined with another parameter/field.

In one example I.2.2, component W ₁ Is turned off/on via implicit signaling.

In one example i.2.2.1, the UE is configured with its value used to determine the component W ₁ Whether P is closed or opened _CSIRS . For example, when P _CSIRS Smaller, e.g. P _CSIRS Less than or equal to t, and the component is closed; otherwise, the component is turned on. The parameter t is a threshold, which may be fixed, e.g. 4 or 8, or configured (via RRC or/and MAC CE or/and DCI).

In one example I.2.2.2, component W ₁ Is based on K being allocated to UE ₁ Values of L or α=1 to be closed or open (details are described above). For example, when

When or when l=p _CSIRS When the component W ₁ Is closed; otherwise (whenWhen L < P _CSIRS When) the component is turned on.

In one example I.2.2.3, component W ₁ Is turned off or on based on the value of the maximum rank that is configured to the UE. For example, when the maximum rank is t, the component W ₁ Is closed; otherwise, the component is turned on. The parameter t is a threshold, which may be fixed, e.g. 2, or configured (via RRC or/and MAC CE or/and DCI).

In one example I.2.2.4, component W ₁ Is turned off or on based on the value of rank (v). For example, when the rank is t, the component W ₁ Is closed; otherwise, the component is turned on. The parameter t is a threshold, which may be fixed, e.g. 2, or configured (via RRC or/and MAC CE or/and DCI).

In one example I.2.3, component W ₁ Is turned off/on based on the UE capability report. For example, the UE reports in its capability report whether it can support component W ₁ . Then, with respect to component W ₁ Is constrained by the UE capability reporting.

In one example I.2.4, the component W of the codebook ₁ May be turned on/off by the gNB according to at least one of the following examples.

In one example, there are two separate parameters, the first parameter is for turning on/off W ₁ And a second parameter is used to configure W ₁ (when opened). The first parameter is always provided. The second parameter may be only W ₁ Is provided when opened. The first parameter may be configured via RRC or/and MAC CE or/and DCI. The second parameter may be configured via RRC or/and MAC CE or/and DCI.

In another example, there is a joint parameter, the value of which closes W ₁ And take at least another value to turn on W ₁ And jointly provide W ₁ . The joint parameters may be configured via RRC or/and MAC CE or/and DCI.

In one embodiment i.3, the component W when the UE is allowed to report rank (or layer number) values v > 1 (e.g., when higher layer parameter rank limitation allows CSI reporting of rank > 1) ₁ Is determined/reported in accordance with at least one of the following examples. When multiple ones of the following examples are supported, then one of the support examples may be configured to the UE (e.g., via RRC or/and MAC CE or/and DCI). This configuration may be constrained by SE capability reporting for CSI reporting for rank > 1.

In one example I.3.1, the port selection matrix W ₁ For all layers i e { 1..v } are common (identical), i.e. only one port selection matrix W, regardless of the rank u value ₁ Is determined/reported by the UE.

In one example I.3.2, the port selection matrix W ₁ Is common (same) for layer pair (l, l+1), where l e {1,3,.. ₁ Is determined/reported by the UE for each layer pair (1, 2), (3, 4), etc.

In one example I.3.3, the port selection matrix W ₁ Common (identical) to each subset of layers. There may be a subset of the multiple layers, which may be fixed or configured.

In one example I.3.4, the port selection matrix W ₁ Independent (separate) for all layers, i.e. one port selection matrix W ₁ Is UE is determined/reported for each layer i=1.

In one example i.3.5, the port selection matrix W is dependent on the configuration (e.g. RRC or/and MAC CE or/and DCI) ₁ According to example i.3.1 or example i.3.4 (or example i.3.2).

In one example I.3.6, depending on the conditions, the port selection matrix W ₁ According to example i.3.1 or example i.3.4 (or example i.3.2). At least one of the following examples is used for this condition.

O in one example, the condition is based on port P _CSIRS For example, when P _CSIRS At > t, example I.3.1 is used, and when P _CSIRS At t, example i.3.4 is used, where t may be fixed (e.g., fixed to 4 or 8) or configured.

O in one example, the condition is based on K ₁ For example, when L > t, example i.3.1 is used, and when l+.t, example i.3.4 is used, where t may be fixed (e.g., fixed to 4) or configured.

In one example, the condition is based on a maximum rank value, e.g., when the maximum rank > t, example i.3.1 is used, and when the maximum rank t is less than or equal to t, example i.3.4 is used, where t may be fixed (e.g., fixed to 2) or configured.

In one example, the condition is based on a rank value, e.g., when rank > t, example i.3.1 is used, and when rank t is less than or equal to t, example i.3.4 is used, where t may be fixed (e.g., fixed to 2) or configured.

In one embodiment i.4, the component W when the UE is allowed to report rank (or layer number) values v > 1 (e.g., when higher layer parameter rank limitation allows CSI reporting of rank > 1) ₁ Is determined/reported in accordance with example i.3.4. In particular, for each layer l, port S _l Is selected/determined/reported such that at least one of the following conditions is met.

In one example I.4.1, S _l And S is _l′ Is for any of the two disjoint sets of ports of i, e {1,., v } (i.e., they do not have any common port) such that l +.l'. This implies that cross-layer transmission is incoherent.

In one example I.4.2, S _l And S is _l′ There may be a common port (i.e., there is no limitation in the port selection across layers).

In one embodiment I.5, component W ₁ (when reported) is a use indicator (e.g., such as i _1，2 The PMI component of (c), wherein the indicator is determined according to at least one of the following examples.

In one example I.5.1, the indicator corresponds to bitmap (bit sequence) b ₀ b ₁ ....b _X-1 Wherein, the method comprises the steps of, wherein,(see example i.1.1) or x=p _CSIRS (see example i.1.2).

O in one example, bit value b _i =1 indicates that port i is selected and bit value b _i =0 indicates that port i is not selected. The number of "1" s in the bitmap is(see example I.1.1) or K ₁ (see example i.1.2).

O in one example, bit value b _i =0 indicates that port i is selected, and bit value b _i =1 indicates that port i is not selected. The number of "0" s in the bitmap is(see example I.1.1) or K ₁ (see example i.1.2).

In one example I.5.2, the indicator corresponds to the indication coming fromA combined index of values of (2) which requires +.>A number of bits, wherein->And->(see example i.1.1) or a=p _CSIRS And b=k ₁ (see example i.1.2).

When component W ₁ When reported to each layer independently (when reported), an indicator is reported to each layer whose payload is according to one of examples i.5.1 and i.5.2.

When the port selection is reported according to example i.5.2, the UE performs the following port selection.

L vectorsi=0, 1..l-1 is identified by wherein +.>Is at index m ⁽ⁱ⁾ P comprising a value of 1 and elsewhere zero (where the first element is the element of index 0) _CSI-RS Column vector of/2 elements

m＝[m ⁽⁰⁾ ...m ^(L-1) ]

These vectors are indexed i by PMI _1，2 Which indicates that, among other things,

the element of m is according to i using C (x, y) and algorithm as defined in Table 5 _l，2 Finding:

s _-1 ＝0

For i＝0，...，L-1：

the maximum is found in Table 5So that i _1，2 -s _i-1 ≥C(x ^* ，L-i)

e _i ＝C(x ^* ，L-i)

s _i ＝s _i-1 +e _i

When m is ⁽ⁱ⁾ When known, i _1，2 Is to useFound, wherein C (x, y) is given in table 5, and wherein index i=0,.. ⁽ⁱ⁾ As i increases. />

If α=1, then m ⁽ⁱ⁾ ＝i，And i _1,2 Not reported. This implies that the port selection is turned off (details are described above).

Table 5: combination coefficient C (x, y)

In one embodiment I.6, when a value K indicating single port selection (per polarization) is ₁ When =2 or l=1 (see example i.1.1) is used/configured, i.e. component W ₁ When a single port (per polarization) is selected, then other components of the codebook (such asAnd W is _f ) Is determined/reported in accordance with at least one of the following examples.

In one example I.6.1, FD group W _f Is determined/reported in accordance with at least one of the following examples.

First, in one example, FD group W _f Having only one column, i.e. M _υ ＝1。

First, in one example, FD group W _f May have one or more columns, i.e. M _υ =1 or M _υ > 1 (e.g. M _υ =2). In one example, M _υ Is configured.

O in one example, when v > x, M _υ =1, and when v is equal to or less than x, M _υ 1, where x is fixed, e.g., x=2.

In one example I.6.2, the coefficient matrixIs determined/reported in accordance with at least one of the following examples.

O in one example, there is K ₁ =2l=2 coefficients (per layer), one of the two coefficients is fixed to 1, its index is reported (e.g. via a 1 bit indication), but the amplitude/phase is not reported; and another coefficient is reported. In one example, only the phase of another coefficient is reported. In one example, the amplitude and phase of the other coefficient are both reported. Thus, the UE reports the indicator(s) of the strongest coefficient and the amplitude/phase of another coefficient.

O in one example, there is a K reported ₁ =2l=2 coefficients (per layer). In one example, only the phases of the two coefficients are reported. In one example, both the magnitude and phase of the two coefficients are reported. Thus, the UE reports the indicator(s) of the amplitude/phase of the two coefficients.

In one example, the phase of the reported coefficients is always reported. However, the amplitude report may be turned on or off, e.g., via higher layer signaling.

In one embodiment I.7, when the value K ₁ =2 or l=1 (see example i.1.1), and when the rank v > x, where x is fixed (e.g., 1 or 2 or 4) or configured, CSI is determined/reported according to at least one of the following examples.

In one example i.7.1, CSI reporting is not supported for v > x (i.e., the UE is not expected to be configured with an allowed rank value greater than x). For rank values v+.ltoreq.x, the CSI report is based on the codebook as explained in this disclosure.

In one example i.7.2, for rank values v+.ltoreq.x, CSI reporting is based on the codebook as explained in the present disclosure, and for rank values v > x, CSI reporting is based on a version 15/16NR codebook, e.g., a type I single-panel codebook.

In one embodiment I.8, when the rank v > x, where x is either fixed (e.g., 1 or 2 or 4) or configured, then the CSI is determined/reported according to at least one of the following examples.

In one example i.8.1, CSI reporting is not supported for v > x (i.e., the UE is not expected to be configured with an allowed rank value greater than x). For rank values v+.ltoreq.x, the CSI report is based on the codebook as explained in this disclosure.

In one example i.8.2, for rank values v+.ltoreq.x, CSI reporting is based on the codebook as explained in the present disclosure, and for rank values u > x, CSI reporting is based on a version 15/16NR codebook, e.g., a type I or type II single panel codebook.

In one embodiment (ii.1), when the UE is configured with a code book for P based on port selection (as described in this disclosure) _CSIRS When CSI reporting of 4 CSI-S ports, port selection parameter K ₁ Or alpha (e.g. when K ₁ ＝αP _CSIRS Or (b)When) is configured/determined in accordance with at least one of the following examples. In one example, α belongs to +.>Or->Is configured by the higher layer parameter param coding-r 17 indicating values α, M and β. Hereinafter, K ₁ ＜P _CSIRS Or alpha < 1 means->Or->In one example, a->Failure to at P _CSIRS ＝4、P _CSIRS =12 or P _CSIRS E {4, 12}, timeIs configured. Or, equivalently, when P _CSIRS ＝4、P _CSIRS =12 or P _CSIRS E {4, 12} the undesirable UE is configured with +.>(or with->Parameter combinations of (c).

In one example (ii.1.1), K for 4 CSI-RS ports ₁ ＜P _CSIRS Or alpha < 1 (or with K) ₁ ＜P _CSIRS Or a < 1 parameter combination) is not supported for all rank values, i.e. in this case only K ₁ ＝P _CSIRS Or alpha=1 (or with K) ₁ ＝P _CSIRS Or a combination of parameters of α=1) may be configured. Or equivalently, undesirable cE is configured with K ₁ ＜P _CSIRS Or alpha < 1 (or with K) ₁ ＜P _CSIRS Or a combination of parameters alpha < 1). Or equivalently, expect the UE to be configured with K only ₁ ＝P _CSIRS Or alpha=1 (or with K) ₁ ＝P _CSIRS Or a = 1 parameter combination).

In one example (ii.1.2), K is reported for 4 CSI-RS ports and rank 3 or 4CSI (e.g., when rank 3 or 4 reporting is allowed by rank or RI restriction via RRC) ₁ ＜P _CSIRS Or alpha < 1 (or with K) ₁ ＜P _CSIRS Or a combination of parameters of alpha < 1) is not supported, in which case only K ₁ ＝P _CSIRS Or alpha=1 (or with K) ₁ ＝P _CSIRS Or a combination of parameters of α=1) may be configured.

In one example (ii.1.2.1), if rank or RI restriction allows rank 1 or 2 (but does not allow rank 3 or 4) CSI reporting,

set of omicron K ₁ ＜P _CSIRS Or alpha < 1 (or with K) ₁ ＜P _CSIRS Or a combination of parameters alpha < 1) and K ₁ ＝P _CSIRS Or alpha=1 (or with K) ₁ ＝P _CSIRS Or a combination of parameters of α=1) may be configured.

Or, equivalent toAny value K ₁ ≤PC _SIRS Or alpha is less than or equal to 1 (or is equal to K) ₁ ≤P _CSIRS Or a combination of parameters of alpha.ltoreq.1) may be configured.

Or, equivalently, the desired UE is configured with K ₁ ＜P _CSIRS Or alpha < 1 (or with K) ₁ ＜P _CSIRS Or a combination of parameters alpha < 1) and K ₁ ＝P _CSIRS Or alpha=1 (or with K) ₁ ＝P _CSIRS Or a combination of parameters of α=1).

In one example (ii.1.2.2), if rank or RI restriction allows CSI reporting of rank 3 or 4 (but not rank 1 or 2),

οK ₁ ＜P _CSIRS or alpha < 1 (or with K) ₁ ＜P _CSIRS Or a combination of parameters of alpha < 1) is not supported, i.e. in this case only K ₁ ＝P _CSIRS Or alpha=1 (or with K) ₁ ＝P _CSIRS Or a combination of parameters of α=1) may be configured.

Or, equivalently, the undesirable UE is configured with K ₁ ＜P _CSIRS Or alpha < 1 (or with K) ₁ ＜P _CSIRS Or a combination of parameters alpha < 1).

Or, equivalently, it is expected that the UE is configured with K only ₁ ＝P _CSIRS Or alpha=1 (or with K) ₁ ＝P _CSIRS Or a = 1 parameter combination).

In one example (ii.1.2.3), if rank or RI restriction allows at least one from rank 1 and 2 and at least one from rank 3 and 4CSI reports,

set of omicron K ₁ ＜P _CSIRS Or alpha < 1 (or with K) ₁ ＜P _CSIRS Or a combination of parameters of alpha < 1) is not supported, i.e. in this case only K ₁ ＝P _CSIRS Or alpha=1 (or with K) ₁ ＝P _CSIRS Or a combination of parameters of α=1) may be configured.

In one example (ii.1.3), parameters for 4 CSI-RS portsMay be configured.

In one example (ii.1.3.1), when α=1, reporting of ranks 1-4 is allowed, i.e. any one of ranks 1-4 is allowed by rank or RI limitation via RRC; and whenWhen only rank 1-2 reporting is allowed, i.e. only rank 1-2 is allowed via RRC by rank or RI limitation. In other words, when rank or RI restriction allows rank 3 or 4 reporting, only α=1 may be configured (or the UE is expected to be configured with α=1); and when rank or RI restriction does not allow rank 3 or 4 reporting (or only rank 1 or rank 2 reporting), α=1 or 1/2 may be configured.

In one example (ii.1.3.2), only rank 1-2 is allowed for both α=1 or 1/2 via RRC limited by rank or RI. In other words, it is not desirable that the UE is configured with rank 3 or 4 (via rank or RI restriction). Or, it is desirable that the UE is configured with rank 1 or 2 (via rank or RI restriction).

In one embodiment (ii.2), when the UE is configured with a code book for P based on port selection (as described in this disclosure) _CSIRS When CSI report of 4 or 8 CSI-S ports, port selection parameter K ₁ Or alpha (e.g. when K ₁ ＝αP _CSIRS Or (b)When) is configured/determined in accordance with at least one of the following examples. In one example, α belongs to +.>Or (b)

In one placeIn example (ii.2.1), K for 4 or 8 (or 4 or 8 or 12) CSI-RS ports ₁ ＜P _CSIRS Or alpha < 1 (or with K) ₁ ＜P _CSIRS Or a < 1 parameter combination) is not supported for all rank values, i.e. in this case only K ₁ ＝P _CSIRS Or alpha=1 (or with K) ₁ ＝P _CSIRS Or a combination of parameters of α=1) may be configured. Or equivalently, it is not desirable that the UE is configured with K ₁ ＜P _CSIRS Or alpha < 1 (or with K) ₁ ＜P _CSIRS Or a combination of parameters alpha < 1). Or equivalently, expect the UE to be configured with K only ₁ ＝P _CSIRS Or alpha=1 (or with K) ₁ ＝P _CSIRS Or a = 1 parameter combination).

In one example (ii.2.2), K is reported for 4 or 8 (or 4 or 8 or 12) CSI-RS ports and rank 3 or 4CSI (e.g., when a rank 3 or 4 report is allowed via RRC by rank or RI restrictions) ₁ ＜P _CSIRS Or alpha < 1 (or with K) ₁ ＜P _CSIRS Or a combination of parameters of alpha < 1) is not supported, in which case only K ₁ ＝P _CSIRS Or alpha=1 (or with K) ₁ ＝P _CSIRS Or a combination of parameters of α=1) may be configured. At least one of examples ii.1.2.1 to ii.1.2.3 may be used/configured.

In one embodiment (iii.1), as described in this disclosure, the components of the port selection codebook are reported via PMI, where the PMI value corresponds to the codebook index i ₁ And i ₂ Wherein, the method comprises the steps of, wherein,

·i _1，2 : the indication comprising W ₁ Index of port selection vector of column(s)

·i _1，6 : the indication comprising W _f Index of frequency domain basis vectors of columns of (a)

·i _1,7,l : bitmap indicating layer l, bitmap indicating location (index) of non-zero coefficient (NZC)

·i _1，8，l : the Strongest Coefficient Indicator (SCI) of indicator layer l

·i _2，3，l : reference amplitude of indicator layer l

·i _2，4，l : amplitude of NZC of indicator layer l

·i _2，5，l : phase of NZC of indication layer l

The corresponding codebooks for layers 1-4 are given in table 6, wherein,is at index m ⁽ⁱ⁾ P comprising a value of 1 and elsewhere 0 (wherein the first element is the element of index 0) _CSI-RS Column vector of/2 elements, quantity y _t Is given by

Wherein t= {0,1,.. ₃ -1, is an index associated with the precoding matrix, and wherein,

for f=0..m-1, and numberIs given by

/>

Table 6: codebook for layer 1. Using antenna ports 3000 to 2999+p _CSI-RS 2, 3 and 4 layer CSI reporting of (a)

For the purpose ofThe amplitude and phase are set to zero, i.e. +.>And->

In one embodiment iv.1, the UE is configured with a higher layer parameter codebook type set to 'typeII-PortSelection-r17' for CSI reporting based on a new (release 17) type II port selection codebook in which the port selections in the release 15/16 type II port selection codebook (in SD) are extended to FD in addition to SD. The UE is also configured with P linked with CSI reporting based on the new type II port selection codebook _CSIRS Multiple CSI-RS ports (either in one CSI-RS resource or distributed over more than one CSI-RS resource). In one example, P _CSIRS =q. In another example, P _CSIRS And (5) not less than Q. Here, q=p _CSIRS，SD ×P _CSIRS，FD . The CSI-RS ports may be beamformed in the SD or/and FD. UE measurement P _CSIRS A number (or at least Q) of CSI-RS ports, estimating a (beamformed) DL channel, and determining a Precoding Matrix Indicator (PMI) using a new port selection codebook, wherein the PMI indication may be used at gNB for each FD unit t e {0, 1.. ₃ -1} construct a set of components S of a precoding matrix (together with beamforming of CSI-RS used for beamforming). In one example, P _CSIRS，SD E {4,8, 12, 16, 32} or }2,4,8, 12, 16, 32}. In one example, P _CSIRS，SD And P _CSIRS，FD So that its product q=p _CSIRS，SD ×P _CSIRS，FD E {4,8, 12, 16, 32} or {2,4}，8，12，16，32}。

In one example iv.1.1, the individual port selection corresponds to via W only in SD ₁ And not via W in FD _f Is selected by the user. SD port selection vectorComprises columns of a. In one example, the SD port selection is common to both antenna polarizations, i.e., one SD base is used for both antenna polarizations. In another example, SD port selection is independent for each of the two antenna polarizations. The value of L may be configured according to {2,4} or {2,3,4} or {2,4,6,8 }.

In one example iv.1.2, the individual port selection corresponds to via W in SD ₁ Port selection of (d) and via W in FD _f Is selected by the user. SD port selection vectorComprises columns of a. In one example, the SD port selection is common to both antenna polarizations, i.e., one SD base is used for both antenna polarizations. In another example, SD port selection is independent for each of the two antenna polarizations. The value of L may be configured according to {2,4} or {2,3,4} or {2,4,6,8 }.

For FD port selection, FD port selection vectorThe set of (C) includes B _l Is a column of (c). In one example of this, in one implementation,as in the version 16 enhanced type II port selection codebook. In one example, the type II port selection codebook is supported in addition to version 16 enhancementM _υ Outside the value of M _v The value of (2) may be 1. In one example, the range of values of R is configured according to {1,2} or {1,2,4}, or {1,4} or {1,2,4,8 }.

In one example iv.1.3, the separate port selections in both SD and FD are via W in the codebook ₁ And the corresponding precoding matrix or matrices are given by

Or (b)

·

·or->Wherein a is _i Is the ith column of matrix A, and b _l,f Is matrix B _l Is the f-th column of (2). The symbol vec (X) transforms the matrix X into a column vector by concatenating the columns of X.

·C _l Includes a port pair { (a) for selected SD-FD _i ，b _l,f ) Coefficient { c } _l，i，f }。

SD port selection vector including column of ASum of (C) including B _l FD port selection vector of columns of (a)Is according to example iv.1.1 or iv.1.2.

In one embodiment IV.2, (L, M) _υ ) Is determined or configured to the UE according to at least one of the following examples.

In example IV.2.1, (L, M) _υ ) Is determined/configured to the UE based on a release 16 mechanism, wherein,or->And N is _SB Is the number of SBs configured for CSI reporting. In particular, the values L, beta and p _υ Is made up of [ REF8 ]]The higher layer parameter param coding-r 17 configuration of clause 5.2.2.2.5/5.2.2.2.6, wherein the supported configurations include all or a subset of the configurations in table 1 or table 7.

TABLE 7

In one example iv.2.2, (L, M) _υ ) The value of (2) is taken as g.times.M _υ Is determined/configured to the UE, where M _υ Is configured according to version 16, g is a scaling factor, andor->And N is _SB Is the number of SBs configured for CSI reporting. In one example, the scaling factor g is fixed, e.g., g=1/2. In one example, the scaling factor g is configured via higher layer (RRC) signaling, e.g., using separate (dedicated) parameters or using joint parameters for multiple parameters. In one example, the scaling factor g is reported by the UE, e.g., via UE capability signaling. If the UE reports multiple values of g, the gNB/NW (network) configures the values according to the multiple values.

In one example, the support value for g may be from {1,1/2}. The value g=1 may be mandatory, i.e. a UE supporting the new codebook must support g=1. The value g=1/2 may be optional, i.e. a UE supporting the new codebook may support g=1/2 (except g=1). The UE reports via individual capability signaling whether it supports g=1/2.

In one example, when g=1/2, the supported configurations include all or a subset of the configurations in table 8 or 9.

TABLE 8

TABLE 9

In one example iv.2.3, (L, M) _υ ) Is determined/configured to the UE such thatOr (b)Wherein N is _SB Is the number of SB's configured for CSI reporting, and p _υ =x and->Or->In one example, the supported configurations include all or a subset of the configurations in table 10.

Table 10

In one example iv.2.4, (L, M) _υ ) Is determined/configured to the UE such that M _υ =1. In one example, the supported configurations include all or a subset of the configurations in table 11.

TABLE 11

/>

In one example iv.2.5, (L, M) _υ ) Is determined/configured to the UE such thatOr (b)Wherein N is _SB Is the number of SB configured for CSI reporting, and +.>Or->In one example, the supported configurations include all or a subset of the configurations in table 12.

Table 12

/>

In one example iv.2.6, P _CSIRS，SD ＝2N ₁ And P is _CSIRS，FD ＝N ₂ Wherein N is ₁ And N ₂ Is configured with one or two higher layer (e.g., RRC) parameters. In one example, the supported (N ₁ ，N ₂ ) Including all or some of the configurations set forth in table 13. Number of CSI-RS ports P _CSIRS ＝P _CSIRS,SD ×P _CSIRS,FD ＝2N ₁ N ₂ 。

Table 13: supported (N) ₁ ，N ₂ ) Is of the configuration of (a)

(L，M _υ ) Is determined/configured to the UE according to at least one of the following examples.

In one example, l=n ₁ And M is _υ ＝N ₂ 。

In one example, L.ltoreq.N ₁ And M is _υ ＝N ₂ . When L < N ₁ When the UE selects L SD ports/beams and reports the selected beams/ports as part of the CSI report. In one example, the supported (N ₁ ，N ₂ ) And the configuration of L includes all or some of the configurations given in table 14, wherein one value for L is configured from the set of values shown in the table.

Table 14: supported (N) ₁ ，N ₂ ) And configuration of L

In one example, l=n ₁ And M is _υ ≤N ₂ . When M _υ ＜N ₂ When the UE selects M _υ FD ports/beams and report the selected beam/port as part of CSI reporting.

In one example, L.ltoreq.N ₁ And M is _υ ≤N ₂ . When L < N ₁ When the UE selects L SD ports/beams and reports the selected beams/ports as part of the CSI report. When M _υ ＜N ₂ When the UE selects M _υ FD ports/beams and report the selected beam/port as part of CSI reporting. In one example, the supported (N ₁ ，N ₂ ) And L and M _υ The configurations of (a) include all or some of the configurations given in Table 15, wherein one value for L and one value for M _υ Is configured from the set of values shown in the table.

Table 15: supported (N) ₁ ，N ₂ ) And L and M _υ Is of the configuration of (a)

In one example of this, in one implementation,(for polarized common port selection) or 2l=k ₁ ＝Y _υ (for polarization specific port selection), where the value Y _υ Is determined/configured according to one of examples ii.2.1 or ii.2.2 or ii.2.3.

In one example iv.2.7, P _CSIRS ＝P _CSIRS，SD ×P _CSIRS，FD So that P _CSIRS E {2,4,8, 12, 16, 24, 32}. In one example, P _CSIRS，SD And P _CSIRS，FD Is configured with one or two higher layer (e.g., RRC) parameters. In one example, P _CSIRS，SD Is configured with higher layer (e.g., RRC) parameters, and P _CSIRS，FD The value of (2) is based on P _CSIRS，SD Is implicitly determined. Supported P _CSIRS，SD And P _CSIRS，FD Some examples of possible values for the values of (a) include the values in table 16 or table 17 or table 18.

Table 16

TABLE 17

TABLE 18

In these examples, the set of possible values for L belongs to {1,2,4,6}, and for M _υ The set of possible values of (1) belongs to, P _CSIRS，FD }. When 2L < P _CSIRS，SD When the UE selects L (or 2L) SD ports/beams and reports the selected beams/ports as part of the CSI report. When M _υ ＜P _CSIRS，FD When the UE selects M _υ FD ports/beams and report the selected beam/port as part of CSI reporting.

Parameters L and M _υ May be configured, for example, via two higher layer RRC parameters, respectively. Or, these parameters may be jointly configured via a single higher layer RRC parameter.

In one example iv.2.8, P _CSIRS ＝P _CSIRS，SD ×P _CSIRS，FD So that P _CSIRS E {2,4,8, 12, 16, 24, 32, 48, 64}. In one example, P _CSIRS，SD And P _CSIRS，FD Is configured with one or two higher layer (e.g., RRC) parameters. In one example, P _CSIRS，SD Is configured with higher layer (e.g., RRC) parameters, and P _CSIRS，FD The value of (2) is based on P _CSIRS，SD Is implicitly determined. Supported P _CSIRS，SD And P _CSIRS，FD Some examples of possible values for the values of (a) include the values in table 19.

TABLE 19

In one embodiment IV.3, (L, M) _υ ) Is determined or configured to the UE according to embodiment iv.1 and iv.2 is limited.

In one example iv.3.1, the limitation is on the rank value.

In one example, the supported (L, M _υ ) May be configured for rank 1 only.

In one example, the supported (L, M _υ ) May be configured for only rank 1 or 2.

In one example, the supported (L, M _υ ) May be configured for only rank 3 or 4.

In one example iv.3.2, the restriction is based on N _SB Is a value of (2).

In one example, the supported (L, M _υ ) A subset of the values of (a) may be for N _SB T is configured, where t is a fixed or configured threshold.

In one example iv.3.3, the restriction is based on N ₃ Is a value of (2).

In one example, the supported (L, M _υ ) A subset of the values of (a) may be for N ₃ T is configured, where t is a fixed (e.g., 19) or configured threshold.

In one example iv.3.4, the restriction is based on the value of R.

In one example, the supported (L, M _υ ) A subset of the values of (1) may be configured for R e S, where S is fixed or configured And (5) placing. In one example, s= {1}.

In example iv.3.5, the restriction is based on N _CSIRS Is a value of (2).

In one example, the supported (L, M _υ ) A subset of the values of (a) may be for N _CSIRS T is configured, where t is a fixed (e.g., 8) or configured threshold.

In one example iv.3.6, the limit is based on the value of β.

In one example, the supported (L, M _υ ) The subset of values of (c) may be configured for β e S, where S is fixed or configured. In one example, s= {1}.

In one example, when s= {1}, M _υ Small values of (e.g. M) _υ =1, configured.

In one example, when s= {1}, 2LM _υ Small values of (2), e.g. 2LM _υ =8, configured.

In one example iv.3.7, the restriction is based on a rank value N _SB 、N ₃ 、R、N _CSIRS And β, and β.

In one embodiment v.1, the UE is configured with a higher layer parameter codebook type set to 'typeII-PortSelection-r17' for CSI reporting based on a new (release 17) type II port selection codebook in which the port selections in the release 15/16 type II port selection codebook (in SD) are extended to FD in addition to SD. The UE is also configured with P linked with CSI reporting based on the new type II port selection codebook _CSIRS Multiple CSI-RS ports (either in one CSI-RS resource or distributed over more than one CSI-RS resource). In one example, P _CSIRS =q. In another example, P _CSIRS And (5) not less than Q. Here, q=p _CSIRS，SD ×P _CSIRS，FD . CSI-RS portMay be beamformed in SD or/and FD. UE measurement P _CSIRS A number (or at least Q) of CSI-RS ports, estimating a (beamformed) DL channel, and determining a Precoding Matrix Indicator (PMI) using a new port selection codebook, wherein the PMI indication may be used at gNB for each FD unit t e 0,1, a, N ₃ -1} construct a set of components S of a precoding matrix (together with beamforming of CSI-RS used for beamforming). In one example, P _CSIRS，SD E {4,8, 12, 16, 32} or {2,4,8, 12, 16, 32}. In one example, P _CSIRS，SD And P _CSIRS，FD So that its product q=p _CSIRS，SD ×P _CSIRS，FD E {4,8, 12, 16, 32} or {2,4,8, 12, 16, 32}.

The new port selection codebook facilitates joint port selection across SD and FD. This is illustrated at the bottom of fig. 12. The codebook structure is similar to a version 15NR type II codebook comprising two principal components.

·W ₁ : from P _CSI-RS Joint selection Y in a pair of SD-FD ports _υ

O in one example, Y _υ ≤P _CSI-RS (if the port selection is independent across two polarizations or two groups of antennas with different polarizations)

·W ₂ : for the selected Y _υ The coefficients are selected for each SD-FD port pair.

In one example, the joint port selection (and its reporting) is common among multiple layers (when v > 1). In one example, the joint port selection (and its reporting) is independent in multiple layers (when v > 1). The reporting of the selected coefficients is independent in multiple layers (when v > 1).

In one example v.1.1, the corresponding precoding matrix or matrices are given by (where there is no Wf component in the codebook, or where the Wf component is turned off, e.g., via higher layers, and Wf is a full one vector when turned off, and thus does not appear in the precoder equation).

Or (b)

·

·or->Wherein (a) _l，i ，b _l，i ) Is the ith SD-FD port pair. The symbol vec (X) transforms the matrix X into a column vector by concatenating the columns of X.

·C _l Includes a port pair { (a) for selected SD-FD _l，i ，b _l，f ) Coefficient { c } _l，i }。

In one example, Y for any value of v _υ =y. In one example, for v ε {1,2}, Y _υ =y1, and for v ε {3,4}, Y _υ =y2. In one example, Y _υ Different values for v are different (independent). In one example, Y _υ Configured, for example, via higher layer RRC signaling. In one example, Y _υ Reported by the UE.

In one example, Y _υ Taking the data from the {2,3,4, P _CSI-RS Or (V)Is a value of (2). In one example, Y _υ Can be adoptedWith a value greater than P _CSI-RS Or->Is a value of (2).

In one example, Y _υ ＝L×M _υ . In one example, Y _υ ＝L _υ ×M _υ . In one example, L or L _υ May be configured according to {2,4} or {2,3,4} or {2,4,6,8 }. In one example of this, in one implementation,as in the version 16 enhanced type II port selection codebook. In one example, except for M supported in the version 16 enhanced type II Port selection codebook _υ Outside the value of M _v The value of (2) may be 1. In one example, the value range of R is configured from {1,2} or {1,2,4}, or {1,4} or {1,2,4,8 }.

In one example V1.2, the corresponding precoding matrix or matrices are given by (where there is a Wf component in the codebook, or where the Wf component is turned on, e.g., via higher layers, and when turned on, wf appears in the precoder equation).

Or (b)

·

·or->Wherein a is _i Is the ith column of the port selection matrix X, and b _l，f Is a matrix W _f Is the f-th column of (2). The symbol vec (X) transforms the matrix X into a column vector by concatenating the columns of X.

·C _l Includes a port pair { (a) for selected SD-FD _i ，b _l，f ) Coefficient { c } _l，i，f }。

In one example, Y _υ ＝L＝K ₁ /2 (selected for polarized common port) or Y _υ ＝2L＝K ₁ (for polarization specific port selection).

In this example, M _υ Is comprised of W _f The number of FD basis vectors of a column of M _υ Whether or not it can be fixed, e.g. to M _υ =2, or configured.

In one embodiment V.2, Y _υ Is determined or configured to the UE according to at least one of the following examples.

In one example V2.1, supported Y for a given number of CSI-RS ports (aggregated in one CSI-RS resource or across more CSI-RS resources) _υ And the configuration of β includes all or some of the configurations given in table 20, wherein for Y _υ Is configured from the set of values shown in the table.

Table 20: supported P _CSI-RS And Y _υ Is of the configuration of (a)

Table 21: supported P _CSI-RS And Y _υ Is of the configuration of (a)

Table 22: supported P _CSI-RS And Y _υ Is of the configuration of (a)

In one example v.2.2, supported Y for a given number of CSI-RS ports (aggregated in one CSI-RS resource or across more CSI-RS resources) _υ The values of (a) include all or some of the configurations given in table 17 or table 18, wherein for Y _υ Is configured from the set of values shown in the table. There are two alternatives in the table. Alt1 is for the case when the port selection is independent across two polarizations or two groups of antennas with different polarizations, and Alt2 is for the case when the port selection is common across two polarizations or two groups of antennas with different polarizations. Polarization common and polarization specific details are described in this disclosure.

In one example, the symbol Y _υ Is to use K ₁ Or L, i.e. Y for the case of polarization specific port selection (Alt 1) _υ ＝K ₁ =2l, and for the case of polarized common port selection (Alte 2), Y _υ ＝K ₁ /2＝L。

In one example, the entire table 21 or table 22 is supported in the specification. In one example, the specification supports a subset of the values in table 21 or table 22. For example, at least one or more of the following corresponds to a subset.

The number of CSI-RS ports supported includes {2,4,8, 12, 16, 24, 32} or {4,8, 12, 16, 24, 32}.

Supported Y _υ The values include {4,8, 12, 16} in the case of Alt1, and {2,4,6,8} in the case of Alt 2.

In one example, the support for certain values may be UE-selectable, i.e., the values may be configured only when the UE reports that the values can be supported; otherwise, these values cannot be configured. For example, the value Y _υ Gtoreq t may be UE selectableWhere t may be fixed, e.g., t=12 or 16 (Alt 1), and t=6 or 8 (Alt 2).

In one example, Y _υ =2 (Alt 1) or Y _υ Support of =1 (Alt 2) is limited to P _CSI-RS X, where x may be fixed (e.g., x=4 or 8), or configured. That is, when P _CSI-RS At > x, Y _υ =2 (Alt 1) or Y _υ =1 (Alt 2) is not supported (and thus cannot be configured).

In one example v.2.3, supported Y for a given number of CSI-RS ports (aggregated in one CSI-RS resource or across more CSI-RS resources) _υ The values of (2) are from candidate values as in examples II21 and ii.2.2; however, there is a Y that can be configured (and thus supported) _υ Minimum value (lower limit) in the value of (a). For example, the lower limit may depend on P _CSI-RS Is a value of (2).

In one example, Y _υ ≥y×P _CSI-RS Or (b)Or->Wherein y is less than or equal to 1. In one example, y is fixed, e.g. +.>Or->Or->Or configured. When configured, y is a slaveOr->Or->Or->Is configured. The configuration may be via separate RRC parameters or via joint configuration parameters (e.g., configuration y and parameters such as beta or/and M _υ Joint parameters of other codebook parameters). For P _CSI-RS Given configuration values and satisfaction Y of _υ ≥y×P _CSI-RS Or (b)Or->Y is a value of Y, Y _υ Is configured by Y _υ ＝y×P _CSI-RS Or->Or (b)Given.

Alternatively, the value Y _υ ＝y×P _CSI-RS Or (b)Or->Wherein y is fixed, e.g., +.>Or->Or->Or configured. When configured, y is from +.> Or (b)Or->Or->Is configured.

In one example, Y _υ ≥max(m，y×P _CSI-RS ) Wherein y.ltoreq.1, and m is the minimum value. In one example, y is fixed, e.gOr->Or->Or configured. In one example, m=1 or 2. Examples are shown in table 23.

Table 23: supported P for m=2 and y=1/2 _CSI-RS And Y _υ Is of the configuration of (a)

In one embodiment v.3, the UE is Y-based _υ ＝y×P _CSI-RS But implicitly configured with Y for a given number of CSI-RS ports (aggregated in one CSI-RS resource or across more CSI-RS resources) _υ Wherein y is configured. The details of y are according to example v.2.3. This configuration is in particular via a joint parameter (such as paramCombination-r 17)Y and Z additional codebook parameters are configured.

In one example v.3.1, z=1, and the joint parameter indicates y and β jointly. The supported parameter combinations may be included in table 24. In one example, the parameter combination remains the same for all rank values, e.g., v e {1,2} or {1,2,3,4}. In one example, one parameter may vary depending on the rank value. For example, for rank 3-4, the parameters are different from rank 1-2.

Table 24

In one example v.3.2, z=2, the joint parameter indicates y, M jointly _υ And beta. The supported parameter combinations may be included in one or more of tables-table 25 through table 28; several examples are shown in some tables, table 27. In one example, the parameter combination remains the same for all rank values, e.g., v e {1,2} or {1,2,3,4}. In one example, M _υ May vary depending on the rank value. For example, for rank 1-2, M _υ Is a configuration value from {1,2}, and for ranks 3-4, M _υ Can be fixed as M _υ ＝1。

Table 25

paramCombination-r17	y	M _υ	β
				1	3/4	1	3/4
2	3/4	1	1
				3	1	1	3/4
4	1	1	1
				5	3/4	2	3/4
6	3/4	2	1
				7	1	2	3/4
8	1	2	1

Table 26

Table 27

paramCombination-r17	y	M _υ	β
				1	3/4	1	1
2	1	1	1
				3	3/4	2	1/2
4	1	2	1/2
				5	3/4	2	3/4
6	1	2	3/4
				7	3/4	2	1
8	1	2	1

Table 28

/>

In one embodiment (vi.1), the UE is configured with a combination of parameters (α, M) from the set (S) _υ Beta), wherein the set comprises combinations such thatM _υ E {1,2}, and +.>The set of all possible parameter combinations is shown in table 29. In one example, M _υ ＝M。

In one example of this, in one implementation,wherein P is _CSI-RS Is the number of configured CSI-RS ports (for CSI reporting). In one example, K ₁ ＝αP _CSI-RS Or->

Table 29

paramComb	α	M _υ	β
				C1	1/2	1	1/2
C2	1/2	1	3/4
				C3	1/2	1	1
C4	1	1	1/2
				C5	1	1	3/4
C6	1	1	1
				C7	1/2	2	1/2
C8	1/2	2	3/4
				C9	1/2	2	1
C10	1	2	1/2
				C11	1	2	3/4
C12	1	2	1

In one example (vi.1.1), the set (S) includes all 12 (C1-C12) parameter combinations (table 29).

In one example (vi.1.2), the set (S) comprises a subset (S1) of 12 (C1-C12) parameter combinations, wherein the subset (S1) comprises up to (at most or less than or equal to) 8 parameter combinations. At least one of the following examples is used to determine 8 parameter combinations:

In one example (vi.1.2.1), s1= { C1,..c 8}.

In one example (vi.1.2.2), s1= { C1,..c 7, C10}.

In one example (vi.1.2.3), S1 comprises S11 and S12, where s11=x and s12=y, and X is one of X1-X15, and Y is one of Y1-Y14, defined as follows.

οX1＝{C1，C2，C3，C4}。

οX2＝{C1，C2，C3，C5}。

οX3＝{C1，C2，C3，C6}。

οX4＝{C1，C2，C4，C5}。

οX5＝{C1，C2，C4，C6}。

οX6＝{C1，C2，C5，C6}。

οX7＝{C1，C3，C4，C5}。

οX8＝{C1，C3，C4，C6}。

οX9＝{C1，C3，C5，C6}。

οX10＝{C1，C4，C5，C6}。

οX11＝{C2，C3，C4，C5}。

οX12＝{C2，C3，C4，C6}。

οX13＝{C2，C3，C5，C6}。

οX14＝{C2，C4，C5，C6}。

οX15＝{C3，C4，C5，C6}。

οY1＝{C7，C8，C10，C11}。

οY2＝{C8，C9，C11，C12}。

οY3＝{C8，C9，C10，C11}。

οY4＝{C7，C8，C9，C10}。

οY5＝{C10，C11}。

οY6＝{C7，C8}。

οY7＝{C7，C10}。

οY8＝{C7，C11}。

οY9＝{C8，C10}。

οY10＝{C8，C11}。

οY11＝{C7，C8，C10}。

οY12＝{C7，C8，C11}。

οY13＝{C7，C10，C11}。

οY14＝{C8，C10，C11}。

In one example (vi.1.2.4), S1 includes at least s11= { C1, C2, C5, C6}, and further includes an additional value (S12) according to at least one of examples S12 in example vi.1.2.3.

In one example (vi.1.2.5), S1 includes at least s11= { C2, C4, C5, C6}, and further includes an additional value (S12) according to at least one of the examples of S12 in example vi.1.2.3.

In one example (vi.1.2.6), S1 includes at least s11= { C1, C3, C5, C6}, and further includes an additional value (S12) according to at least one of examples S12 in example vi.1.2.3.

In one example (vi.1.2.7), S1 includes at least s11= { C1, C4, C5, C6}, and further includes an additional value (S12) according to at least one of examples S12 in example vi.1.2.3.

In one example (vi.1.2.8), S1 includes at least s11= { C3, C4, C5, C6}, and further includes an additional value (S12) according to at least one of examples S12 in example vi.1.2.3.

In one example (vi.1.2.9), s1= { a1, a 2..a., a8}, where a1 is one of C1-C12, a2 is one of C1-C12 but is different from a1, and so on until a8 is one of C1-C12 but is different from any of { a1, a 2..a., a7 }.

In one example (vi.1.3), set (S) is the same as example iii.1.2, except that configured beta values are used for rank 1 or 2CSI reporting, and beta values for rank 3 or 4CSI reporting are sχ beta, where beta is the configured value, and S is a fixed (e.g.,or 0.5), configuration (e.g., via higher layers), or scaling reported by the UE (e.g., as part of CSI reporting).

In one example (vi.1.4), set (S) is the same as example iii.1.2, except for P _CSI-RS The alpha value of > pCSI-RS is t x alpha, where alpha is for P _CSI-RS The value of p CSI-RS ports, p is fixed (e.g., 12), and t is fixed (e.g., t=1 or 1/2), configured (e.g., via higher layers), or scaled as reported by the UE (e.g., as part of CSI reporting).

In one example (vi.1.5) that is a combination of iii.1.3 and iii.1.4, set (S) is the same as example vi.1.2, except that:

the configured beta value is for rank 1 or 2CSI reporting, and the beta value for rank 3 or 4CSI reporting is s x beta, where beta is the configured value, and s is a fixed (e.g., Or 0.5), configuration (e.g., via higher layers), or scaling reported by the UE (e.g., as part of CSI reporting), and

for P _CSI-RS The alpha value of > P CSI-RS ports is t x alpha, where alpha is for P _CSI-RS The value of p CSI-RS ports, p is fixed (e.g., 12), and t is fixed (e.g., t=1 or 1/2), configured (e.g., via higher layers), or scaled as reported by the UE (e.g., as part of CSI reporting).

In one example (vi.1.6), set (S) is the same as example iii.1.2, except that:

for AND M _υ Combination of=1, configured β value is the same for all ranks (rank 1-4), and

for AND M _υ A combination of =2, configured beta value for rank 1 or 2CSI reporting, and beta value for rank 3 or 4CSI reporting is sχβ, where β is configured value, and s is fixed (e.g.,or 0.5), configuration (e.g., via higher layers), or scaling reported by the UE (e.g., as part of CSI reporting).

In one example (vi.1.7), set (S) is the same as example iii.1.2, except that:

for AND M _υ Combination of=1, configured α value is the same for all ranks (rank 1-4), and

for AND M _υ Combination of =2 for P _CSI-RS The alpha value of > P CSI-RS ports is t x alpha, where alpha is for P _CSI-RS The value of p CSI-RS ports, p is fixed (e.g., 12), and t is fixed (e.g., t=1 or 1/2), configured (e.g., via higher layers), or scaled as reported by the UE (e.g., as part of CSI reporting).

In one example (vi.1.8), set (S) is the same as example iii.1.5, except that:

the configured beta value is for rank 1 or 2CSI reporting, and the beta value for rank 3 or 4CSI reporting is s x beta, where beta is the configured value, and s is a fixed (e.g.,or 0.5), configuration (e.g., via higher layers), or scaling reported by the UE (e.g., as part of CSI reporting), and

the parameter α is determined as follows:

omicron pair and M _υ Combination of=1, configured α value is the same for all ranks (rank 1-4), and

omicron pair and M _υ Combination of =2, needleP pair P _CSI-RS The alpha value of > P CSI-RS ports is t x alpha, where alpha is for P _CSI-RS The value of p CSI-RS ports, p is fixed (e.g., 12), and t is fixed (e.g., t=1 or 1/2), configured (e.g., via higher layers), or scaled as reported by the UE (e.g., as part of CSI reporting).

In one example (vi.1.9), set (S) is the same as example iii.1.5, except

For P _CSI-RS The alpha value of > P CSI-RS ports is t x alpha, where alpha is for P _CSI-RS Values of p CSI-RS ports, p is fixed (e.g., 12), and t is a scaling of fixed (e.g., t=1 or 1/2), configuration (e.g., via higher layers), or reporting by the UE (e.g., as part of CSI reporting), and

the parameter β is determined as follows:

omicron pair and M _υ Combination of=1, configured β value is the same for all ranks (rank 1-4), and

omicron pair and M _υ A combination of =2, configured beta value for rank 1 or 2CSI reporting, and beta value for rank 3 or 4CSI reporting is sχβ, where β is configured value, and s is fixed (e.g.,or 0.5), configuration (e.g., via higher layers), or scaling reported by the UE (e.g., as part of CSI reporting).

In one example (vi.1.10), set (S) is the same as example iii.1.5, except that:

the parameter α is determined as follows:

omicron pair and M _υ Combination of =2 for P _CSI-RS The alpha value of > P CSI-RS ports is t x alpha, where alpha is for P _CSI-RS Values of p CSI-RS ports, p is fixed (e.g., 12), and t is fixed (e.g., t=1 or 1/2), configured (e.g., via higher layers), or reported by the UE (e.g., as CSI report) Part of the notice), and

the parameter β is determined as follows:

In one embodiment (vi.2), the UE is configured with a combination of parameters (α, M) from the set (S) _υ Beta), wherein the set comprises combinations such thatM _υ E {1,2}, and +.>The set of all possible parameter combinations is shown in table 30. In one example, M _υ ＝M。

In one example, whenWhen configured, is p->The number of CSI-RS ports applied (P _CSI-RS ) There are limitations.

In one example, when P _CSI-RS When the number of the samples is =4,cannot be configured. Or, when P _CSI-RS When=4, the undesired UE is configured with +.>Is described.

In one example, when P _CSI-RS When the number of the samples is 12,cannot be configured. Or, when P _CSI-RS When=12, the undesired UE is configured with +.>Is described.

In one example, when P _CSI-RS When the number of the codes is =4 or 12,cannot be configured. Or, when P _CSI-RS When=4 or 12, the undesirable UE is configured with +.>Is described.

In one example, only when P _CSI-RS E {8, 16, 24, 32},may be configured. Or only P _CSI-RS E {8, 16, 24, 32}, it is expected that the UE is configured with +.>Is described.

In one example of this, in one implementation,in one example, K ₁ ＝αP _CSI-RS Or->

In one example, ifThen->And otherwise, K ₁ ＝αP _CSI-RS Or (b)

In one example, if P _CSI-RS =4 or 12, thenAnd otherwise, K ₁ ＝αP _CSI-RS Or->

In one example, ifAnd P is _CSI-RS =4 or 12, then->And otherwise, K ₁ ＝αP _CSI-RS Or->

Table 30

paramComb	α	M _υ	β
				C1	3/4	1	1/2
C2	3/4	1	3/4
				C3	3/4	1	1
C4	1	1	1/2
				C5	1	1	3/4
C6	1	1	1
				C7	3/4	2	1/2
C8	3/4	2	3/4
				C9	3/4	2	1
C10	1	2	1/2
				C11	1	2	3/4
C12	1	2	1

In one example (vi.2.1), set (S) includes all 12 (C1 to C12) parameter combinations (table 30).

In one example (vi.2.2), the set (S) comprises a subset (S1) of 12 (C1-C12) parameter combinations, wherein the subset (S1) comprises up to (at most or less than or equal to) 8 parameter combinations. At least one of the following examples is used to determine 8 parameter combinations:

in one example (vi.2.2.1), s1= { C1, …, C8}.

In one example (vi.2.2.2), s1= { C1, …, C7, C10}.

In one example (vi.2.2.3), S1 comprises S11 and S12, where s11=x and s12=y, and X is one of X1-X15, and Y is one of Y1-Y14, defined as follows.

οX1＝{C1，C2，C3，C4}。

οX2＝{C1，C2，C3，C5}。

οX3＝{C1，C2，C3，C6}。

οX4＝{C1，C2，C4，C5}。

οX5＝{C1，C2，C4，C6}。

οX6＝{C1，C2，C5，C6}。

οX7＝{C1，C3，C4，C5}。

οX8＝{C1，C3，C4，C6}。

οX9＝{C1，C3，C5，C6}。

οX10＝{C1，C4，C5，C6}。

οX11＝{C2，C3，C4，C5}。

οX12＝{C2，C3，C4，C6}。

οX13＝{C2，C3，C5，C6}。

οX14＝{C2，C4，C5，C6}。

οX15＝{C3，C4，C5，C6}。

οY1＝{C7，C8，C10，C11}。

οY2＝{C8，C9，C11，C12}。

οY3＝{C8，C9，C10，C11}。

οY4＝{C7，C8，C9，C10}。

οY5＝{C10，C11}。

οY6＝{C7，C8}。

οY7＝{C7，C10}。

οY8＝{C7，C11}。

οY9＝{C8，C10}。

οY10＝{C8，C11}。

οY11＝{C7，C8，C10}。

οY12＝{C7，C8，C11}。

οY13＝{C7，C10，C11}。

οY14＝{C8，C10，C11}。

In one example (vi.2.2.4), S1 includes at least s11= { C1, C2, C5, C6}, and further includes an additional value (S12) according to at least one of examples S12 in example iii.2.2.3.

In one example (vi.2.2.5), S1 includes at least s11= { C2, C4, C5, C6}, and further includes an additional value (S12) according to at least one of examples S12 in example iii.2.2.3.

In one example (vi.2.2.6), S1 includes at least s11= { C1, C3, C5, C6}, and further includes an additional value (S12) according to at least one of examples S12 in example iii.2.2.3.

In one example (vi.2.2.7), S1 includes at least s11= { C1, C4, C5, C6}, and further includes an additional value (S12) according to at least one of examples S12 in example iii.2.2.3.

In one example (vi.2.2.8), S1 includes at least s11= { C3, C4, C5, C6}, and further includes an additional value (S12) according to at least one of examples S12 in example iii.2.2.3.

In one example (vi.2.2.9), s1= { a1, a2, …, a8}, where a1 is one of C1-C12, a2 is one of C1-C12 but different from a1, and so on until a8 is one of C1-C12 but different from any of { a1, a2, …, a7 }.

In one example (vi.2.3), set (S) is the same as example iii.2.2 except that configured beta values are used for rank 1 or 2CSI reporting, and beta values for CSI reporting of rank 3 or 4 are S x beta, where beta is the configured value, and S is a fixed (e.g.,or 0.5), configuration (e.g., via higher layers), or scaling reported by the UE (e.g., as part of CSI reporting).

In one example (vi.2.4), set (S) is the same as example vi.2.2, except for P _CSI-RS The alpha value of > pCSI-RS is t x alpha, where alpha is for P _CSI-RS The value of p CSI-RS ports, p is fixed (e.g., 12), and t is fixed (e.g., t=1 or 1/2), configured (e.g., via higher layers), or scaled as reported by the UE (e.g., as part of CSI reporting).

In one example (vi.2.5) that is a combination of vi.2.3 and vi.2.4, set (S) is the same as example vi.2.2, except:

configured beta value for rank 1 or 2CSI reporting, and withThe beta value reported in rank 3 or 4CSI is sχbeta, where beta is the configured value, and s is a fixed (e.g.,or 0.5), configuration (e.g., via higher layers), or scaling reported by the UE (e.g., as part of CSI reporting), and

In one example (vi.2.6), set (S) is the same as example i1i.2.2, except:

In one example (vi.2.7), set (S) is the same as example iii.2.2, except that:

In one example (vi.2.8), set (S) is the same as example iii.2.5, except that:

the parameter α is determined as follows:

omicron pair and M _υ Combination of =2 for P _CSI-RS The alpha value of > P CSI-RS ports is t x alpha, where alpha is for P _CSI-RS The value of p CSI-RS ports, p is fixed (e.g., 12), and t is fixed (e.g., t=1 or 1/2), configured (e.g., via higher layers), or scaled as reported by the UE (e.g., as part of CSI reporting).

In one example (vi.2.9), set (S) is the same as example vi.2.5, except that:

The parameter β is determined as follows:

In one example (vi.2.10), set (S) is the same as example iii.2.5, except that:

the parameter α is determined as follows:

omicron pair and M _υ Combination of =2 for P _CSI-RS The alpha value of > P CSI-RS ports is t x alpha, where alpha is for P _CSI-RS Values of p CSI-RS ports, p is fixed (e.g., 12), and t is a scaling of fixed (e.g., t=1 or 1/2), configuration (e.g., via higher layers), or reporting by the UE (e.g., as part of CSI reporting), and

the parameter β is determined as follows:

In one embodiment (vi.3), the UE is configured with a combination of parameters (α, M) from the set (S) _υ Beta), wherein the set comprises combinations such thatM _υ E {1,2}, and +.>The set of all possible parameter combinations is shown in table 27. In one example, M _υ ＝M。

In one example, only when P _CSI-RS E {8, 16, 24, 32}, May be configured. Or alternatively, the first and second heat exchangers may be,only when P _CSI-RS E {8, 16, 24, 32}, it is expected that the UE is configured with +.>Is described.

In one example, ifThen->And otherwise, K ₁ ＝αP _CSI-RS Or (b)

Table 31

paramComb	α	M _υ	β
				C1	1/2	1	1/2
C2	1/2	1	3/4
				C3	1/2	1	1
C4	3/4	1	1/2
				C5	3/4	1	3/4
C6	3/4	1	1
				C7	1/2	2	1/2
C8	1/2	2	3/4
				C9	1/2	2	1
C10	3/4	2	1/2
				C11	3/4	2	3/4
C12	3/4	2	1

In one example (vi.3.1), the set (S) includes all 12 (C1-C12) parameter combinations (table 31).

In one example (vi.3.2), the set (S) comprises a subset (S1) of 12 (C1-C12) parameter combinations, wherein the subset (S1) comprises up to (at most or less than or equal to) 8 parameter combinations. At least one of the following examples is used to determine 8 parameter combinations:

in one example (vi.3.2.1), s1= { C1, …, C8}.

In one example (vi.3.2.2), s1= { C1, …, C7, C10}.

In one example (vi.3.2.3), S1 comprises S11 and S12, where s11=x and s12=y, and X is one of X1-X15, and Y is one of Y1-Y14, defined as follows.

οX1＝{C1，C2，C3，C4}。

οX2＝{C1，C2，C3，C5}。

οX3＝{C1，C2，C3，C6}。

οX4＝{C1，C2，C4，C5}。

οX5＝{C1，C2，C4，C6}。

οX6＝{C1，C2，C5，C6}。

οX7＝{C1，C3，C4，C5}。

οX8＝{C1，C3，C4，C6}。

οX9＝{C1，C3，C5，C6}。

οX10＝{C1，C4，C5，C6}。

οX11＝{C2，C3，C4，C5}。

οX12＝{C2，C3，C4，C6}。

οX13＝{C2，C3，C5，C6}。

οX14＝{C2，C4，C5，C6}。

οX15＝{C3，C4，C5，C6}。

οY1＝{C7，C8，C10，C11}。

οY2＝{C8，C9，C11，C12}。

οY3＝{C8，C9，C10，C11}。

οY4＝{C7，C8，C9，C10}。

οY5＝{C10，C11}。

οY6＝{C7，C8}。

οY7＝{C7，C10}。

οY8＝{C7，C11}。

οY9＝{C8，C10}。

οY10＝{C8，C11}。

οY11＝{C7，C8，C10}。

οY12＝{C7，C8，C11}。

οY13＝{C7，C10，C11}。

οY14＝{C8，C10，C11}。

In one example (vi.3.2.4), S1 includes at least s11= { C1, C2, C5, C6}, and further includes an additional value (S12) according to at least one of examples S12 in example iii.3.2.3.

In one example (vi.3.2.5), S1 includes at least s11= { C2, C4, C5, C6}, and further includes an additional value (S12) according to at least one of examples S12 in example iii.3.2.3.

In one example (vi.3.2.6), S1 includes at least s11= { C1, C3, C5, C6}, and further includes an additional value (S12) according to at least one of examples S12 in example iii.3.2.3.

In one example (vi.3.2.7), S1 includes at least s11= { C1, C4, C5, C6}, and further includes an additional value (S12) according to at least one of examples S12 in example iii.3.2.3.

In one example (vi.3.2.8), S1 includes at least s11= { C3, C4, C5, C6}, and further includes an additional value (S12) according to at least one of examples S12 in example iii.3.2.3.

In one example (vi.3.2.9), s1= { a1, a 2..a., a8}, where a1 is one of C1-C12, a2 is one of C1-C12 but is different from a1, and so on until a8 is one of C1-C12 but is different from any of { a1, a 2..a., a7 }.

In one example (vi.3.3), set (S) is the same as example iii.3.2, except that configured beta values are used for rank 1 or 2CSI reporting, and beta values for rank 3 or 4CSI reporting are sχ beta, where beta is the configured value, and S is a fixed (e.g., Or 0.5), configuration (e.g., via higher layers), or scaling reported by the UE (e.g., as part of CSI reporting).

In one example (vi.3.4), set (S) is the same as example iii.3.2, except for P _CSI-RS The alpha value of > pCSI-RS is t x alpha, where alpha is for P _CSI-RS The value of p CSI-RS ports, p is fixed (e.g., 12), and t is fixed (e.g., t=1 or 1/2), configured (e.g., via higher layers), or scaled as reported by the UE (e.g., as part of CSI reporting).

In one example (vi.3.5) that is a combination of iii.3.3 and iii.3.4, set (S) is the same as example iii.3.2, except:

the configured beta value is for rank 1 or 2CSI reporting, and the beta value for rank 3 or 4CSI reporting is s x beta, where beta is the configured value, and s is a fixed (e.g.,or 0.5), configuration (e.g., via higher layers) or scaling reported by the UE (e.g., as part of CSI reporting), and +.>

In one example (vi.3.6), set (S) is the same as example i1i.3.2, except:

In one example (vi.3.7), set (S) is the same as example iii.3.2, except that:

for AND M _υ Combination of =2 for P _CSI-RS The alpha value of > P CSI-RS ports is t x alpha, where alpha is for P _CSI-RS Values of p CSI-RS ports, p is fixed (e.g., 12), and t is fixed (e.g., t=1 or 1/2), configured (e.g., via higher layers)

Or scaling reported by the UE (e.g., as part of CSI reporting).

In one example (vi.3.8), set (S) is the same as example i1i.3.5, except that

The configured beta value is for rank 1 or 2SI reporting, and the beta value for rank 3 or 4SI reporting is s x beta, where beta is the configured value, and s is fixed (e.g., Or 0.5), configuration (e.g., via higher layers), or scaling reported by the UE (e.g., as part of CSI reporting), and

the parameter α is determined as follows:

In one example (vi.3.9), set (S) is the same as example II1.3.5, except that:

for P _CSI-RS > p CSI-RThe alpha value of the S port is t x alpha, where alpha is for P _CSI-RS Values of p CSI-RS ports, p is fixed (e.g., 12), and t is a scaling of fixed (e.g., t=1 or 1/2), configuration (e.g., via higher layers), or reporting by the UE (e.g., as part of CSI reporting), and

the parameter β is determined as follows:

omicron pair and M _υ A combination of =2, configured beta value for rank 1 or 2SI reporting, and beta value for rank 3 or 4SI reporting is sχβ, where β is configured value, and s is fixed (e.g., Or 0.5), configuration (e.g., via higher layers), or scaling reported by the UE (e.g., as part of CSI reporting).

In one example (vi.3.10), set (S) is the same as example iii.3.5, except that:

the parameter α is determined as follows:

the parameter β is determined as follows:

omicron pair and M _υ A combination of =2, configured beta value for rank 1 or 2SI reporting, and beta value for rank 3 or 4CSI reporting is sχβ, where β is configured value, and s is fixed (e.g.,or 0.5), configuration (e.g., via higher layers), or scaling reported by the UE (e.g., as part of CSI reporting).

In one embodiment (vi.4), the UE is configured with a combination of parameters (α, M) from the set (S) _υ Beta), wherein the set comprises combinations such thatM _υ E {1,2}, and +.>The set of all possible parameter combinations is shown in table 32. In one example, M _υ ＝M。

In one example, when P _CSI-RS When the number of the samples is 12,cannot be configured. Or when _PCSI-RS When=12, the undesired UE is configured with +.>Is described.

In one example, ifThen->And otherwise, K ₁ ＝αP _CSI-RS Or->

In one example, if P _CSI-RS Either of these is =4 or 12,thenAnd otherwise, K ₁ ＝αP _CSI-RS Or->

In one example, the comparison is made only when the number of CSI-RS ports P.gtoreq.p (where P is fixed (e.g., 16)) or when P ε {16, 24, 32}Or/and->May be configured.

Table 32

In one example (VI.4.1), the set (S) includes all 18 (C1-C12 and D1-D6) parameter combinations (Table 32).

In one example (vi.4.2), the set (S) comprises a subset (S1) of 18 (C1-C12) parameter combinations, wherein the subset (S1) comprises up to (at most or less than or equal to) 8 parameter combinations. At least one of the following examples (examples vi.1.2.1 to vi.1.2.9, examples vi.2.2.1 to vi.2.2.9, examples vii.3.2.1 to vi.3.2.9) may be used. Or, N.gtoreq.1 combinations in these examples are replaced by N combinations from D1 to D6.

Table 33

paramComb	α	M _υ	β
				C2	1/2	1	3/4
C4	3/4	1	1/2
				C6	3/4	1	1
D1	1	1	1/2
				D2	1	1	3/4
D3	1	1	1
				C7	1/2	2	1/2
C8	1/2	2	3/4
				D4	1	2	1/2
D5	1	2	3/4

In one example (vi.4.3), the set (S) includes a subset (S1) of 18 (C1-C12) parameter combinations, wherein the subset (S1) includes 10 parameter combinations shown in table 29, selected from the 18 (C1-C12 and D1-D6) parameter combinations (table 28).

In one example (vi.4.4), the set (S) comprises a subset (S1) of 18 (C1-C12) parameter combinations, wherein the subset (S1) comprises 9 parameter combinations shown in table 29, which are selected from the 18 (C1-C12 and D1-D6) parameter combinations. The 9 parameter combinations are according to one of the following examples.

·S1＝{C2，C4，C6，D1，D2，D3，C7，C8，D4}

·S1＝{C2，C4，C6，D1，D2，D3，C7，C8，D5}

·S1＝{C2，C4，C6，D1，D2，D3，C7，D4，D5}

·S1＝{C2，C4，C6，D1，D2，D3，C8，D4，D5}

·S1＝{C2，C4，C6，D1，D2，C7，C8，D4，D5}

·S1＝{C2，C4，C6，D1，D3，C7，C8，D4，D5}

·S1＝{C2，C4，C6，D2，D3，C7，C8，D4，D5}

·S1＝{C2，C4，D1，D2，D3，C7，C8，D4，D5}

·S1＝{C2，C6，D1，D2，D3，C7，C8，D4，D5}

·S1＝{C4，C6，D1，D2，D3，C7，C8，D4，D5}

In one example (vi.4.5), the set (S) includes a subset (S1) of 18 (C1-C12) parameter combinations, wherein the subset (S1) includes 8 parameter combinations shown in table 29, selected from the 18 (C1-C12 and D1-D6) parameter combinations (table 32). The 8 parameter combinations are according to one of the following examples.

·S1＝{C2，C4，C6，D1，D2，D3，C7，C8}

·S1＝{C2，C4，C6，D1，D2，D3，C7，D4}

·S1＝{C2，C4，C6，D1，D2，D3，C7，D5}

·S1＝{C2，C4，C6，D1，D2，D3，C8，D4}

·S1＝{C2，C4，C6，D1，D2，D3，C8，D5}

·S1＝{C2，C4，C6，D1，D2，D3，D4，D5}

·S1＝{C2，C4，C6，D1，D2，C7，C8，D4}

·S1＝{C2，C4，C6，D1，D2，C7，C8，D5}

·S1＝{C2，C4，C6，D1，D2，C7，D4，D5}

·S1＝{C2，C4，C6，D1，D2，C8，D4，D5}

·S1＝{C2，C4，C6，D1，D3，C7，C8，D4}

·S1＝{C2，C4，C6，D1，D3，C7，C8，D5}

·S1＝{C2，C4，C6，D1，D3，C7，D4，D5}

·S1＝{C2，C4，C6，D1，D3，C8，D4，D5}

·S1＝{C2，C4，C6，D1，C7，C8，D4，D5}

·S1＝{C2，C4，C6，D2，D3，C7，C8，D4}

·S1＝{C2，C4，C6，D2，D3，C7，C8，D5}

·S1＝{C2，C4，C6，D2，D3，C7，D4，D5}

·S1＝{C2，C4，C6，D2，D3，C8，D4，D5}

·S1＝{C2，C4，C6，D2，C7，C8，D4，D5}

·S1＝{C2，C4，C6，D3，C7，C8，D4，D5}

·S1＝{C2，C4，D1，D2，D3，C7，C8，D4}

·S1＝{C2，C4，D1，D2，D3，C7，C8，D5}

·S1＝{C2，C4，D1，D2，D3，C7，D4，D5}

·S1＝{C2，C4，D1，D2，D3，C8，D4，D5}

·S1＝{C2，C4，D1，D2，C7，C8，D4，D5}

·S1＝{C2，C4，D1，D3，C7，C8，D4，D5}

·S1＝{C2，C4，D2，D3，C7，C8，D4，D5}

·S1＝{C2，C6，D1，D2，D3，C7，C8，D4}

·S1＝{C2，C6，D1，D2，D3，C7，C8，D5}

·S1＝{C2，C6，D1，D2，D3，C7，D4，D5}

·S1＝{C2，C6，D1，D2，D3，C8，D4，D5}

·S1＝{C2，C6，D1，D2，C7，C8，D4，D5}

·S1＝{C2，C6，D1，D3，C7，C8，D4，D5}

·S1＝{C2，C6，D2，D3，C7，C8，D4，D5}

·S1＝{C4，C6，D1，D2，D3，C7，C8，D4}

·S1＝{C4，C6，D1，D2，D3，C7，C8，D5}

·S1＝{C4，C6，D1，D2，D3，C7，D4，D5}

·S1＝{C4，C6，D1，D2，D3，C8，D4，D5}

·S1＝{C4，C6，D1，D2，C7，C8，D4，D5}

·S1＝{C4，C6，D1，D3，C7，C8，D4，D5}

·S1＝{C4，C6，D2，D3，C7，C8，D4，D5}

·S1＝{C4，D1，D2，D3，C7，C8，D4，D5}

·S1＝{C6，D1，D2，D3，C7，C8，D4，D5}

Watch 34

/>

In one example (vi.4.6), the set (S) includes a subset (S1) of 18 (C1-C12) parameter combinations, wherein the subset (S1) includes 10 parameter combinations shown in table 30, selected from the 18 (C1-C12 and D1-D6) parameter combinations (table 32).

In one example (vi.4.7), the set (S) comprises a subset (S1) of 18 (C1-C12) parameter combinations, wherein the subset (S1) comprises 9 parameter combinations shown in table 34, selected from the 18 (C1-C12 and D1-D6) parameter combinations. The 9 parameter combinations are according to one of the following examples.

·S1＝{C2，C4，C6，D1，D2，D3，C7，C10，D4}

·S1＝{C2，C4，C6，D1，D2，D3，C7，C10，D5}

·S1＝{C2，C4，C6，D1，D2，D3，C7，D4，D5}

·S1＝{C2，C4，C6，D1，D2，D3，C10，D4，D5}

·S1＝{C2，C4，C6，D1，D2，C7，C10，D4，D5}

·S1＝{C2，C4，C6，D1，D3，C7，C10，D4，D5}

·S1＝{C2，C4，C6，D2，D3，C7，C10，D4，D5}

·S1＝{C2，C4，D1，D2，D3，C7，C10，D4，D5}

·S1＝{C2，C6，D1，D2，D3，C7，C10，D4，D5}

·S1＝{C4，C6，D1，D2，D3，C7，C10，D4，D5}

In one example (vi.4.8), the set (S) includes a subset (S1) of 18 (C1-C12) parameter combinations, wherein the subset (S1) includes 8 parameter combinations shown in table 30, selected from the 18 (C1-C12 and D1-D6) parameter combinations (table 32). The 8 parameter combinations are according to one of the following examples.

·S1＝{C2，C4，C6，D1，D2，D3，C7，C10}

·S1＝{C2，C4，C6，D1，D2，D3，C7，D4}

·S1＝{C2，C4，C6，D1，D2，D3，C7，D5}

·S1＝{C2，C4，C6，D1，D2，D3，C10，D4}

·S1＝{C2，C4，C6，D1，D2，D3，C10，D5}

·S1＝{C2，C4，C6，D1，D2，D3，D4，D5}

·S1＝{C2，C4，C6，D1，D2，C7，C10，D4}

·S1＝{C2，C4，C6，D1，D2，C7，C10，D5}

·S1＝{C2，C4，C6，D1，D2，C7，D4，D5}

·S1＝{C2，C4，C6，D1，D2，C10，D4，D5}

·S1＝{C2，C4，C6，D1，D3，C7，C10，D4}

·S1＝{C2，C4，C6，D1，D3，C7，C10，D5}

·S1＝{C2，C4，C6，D1，D3，C7，D4，D5}

·S1＝{C2，C4，C6，D1，D3，C10，D4，D5}

·S1＝{C2，C4，C6，D1，C7，C10，D4，D5}

·S1＝{C2，C4，C6，D2，D3，C7，C10，D4}

·S1＝{C2，C4，C6，D2，D3，C7，C10，D5}

·S1＝{C2，C4，C6，D2，D3，C7，D4，D5}

·S1＝{C2，C4，C6，D2，D3，C10，D4，D5}

·S1＝{C2，C4，C6，D2，C7，C10，D4，D5}

·S1＝{C2，C4，C6，D3，C7，C10，D4，D5}

·S1＝{C2，C4，D1，D2，D3，C7，C10，D4}

·S1＝{C2，C4，D1，D2，D3，C7，C10，D5}

·S1＝{C2，C4，D1，D2，D3，C7，D4，D5}

·S1＝{C2，C4，D1，D2，D3，C10，D4，D5}

·S1＝{C2，C4，D1，D2，C7，C10，D4，D5}

·S1＝{C2，C4，D1，D3，C7，C10，D4，D5}

·S1＝{C2，C4，D2，D3，C7，C10，D4，D5}

·S1＝{C2，C6，D1，D2，D3，C7，C10，D4}

·S1＝{C2，C6，D1，D2，D3，C7，C10，D5}

·S1＝{C2，C6，D1，D2，D3，C7，D4，D5}

·S1＝{C2，C6，D1，D2，D3，C10，D4，D5}

·S1＝{C2，C6，D1，D2，C7，C10，D4，D5}

·S1＝{C2，C6，D1，D3，C7，C10，D4，D5}

·S1＝{C2，C6，D2，D3，C7，C10，D4，D5}

·S1＝{C4，C6，D1，D2，D3，C7，C10，D4}

·S1＝{C4，C6，D1，D2，D3，C7，C10，D5}

·S1＝{C4，C6，D1，D2，D3，C7，D4，D5}

·S1＝{C4，C6，D1，D2，D3，C10，D4，D5}

·S1＝{C4，C6，D1，D2，C7，C10，D4，D5}

·S1＝{C4，C6，D1，D3，C7，C10，D4，D5}

·S1＝{C4，C6，D2，D3，C7，C10，D4，D5}

·S1＝{C4，D1，D2，D3，C7，C10，D4，D5}

·S1＝{C6，D1，D2，D3，C7，C10，D4，D5}

When s1= { C6, D1, D2, D3, C7, C10, D4, D5} the UE may be configured with the parameter combinations from table 31. In one example, when M _υ When rank is common (i.e., v is the same for all ranks), M can be set _υ ＝M。

Table 35

paramCombination-r17	paramComb	α	M _υ	β
					4	C4	3/4	1	1/2
3	D1	1	1	1/2
					2	D2	1	1	3/4
1	D3	1	1	1
					8	C7	1/2	2	1/2
7	C10	3/4	2	1/2
					6	D4	1	2	1/2
5	D5	1	2	3/4

When column M _υ (or when M _υ M) and a when rank common are exchanged, the parameter combinations in table 35 are equivalent to the parameter combinations in table 36. Thus, the values α, M and β are configured/determined by the higher layer parameter paramCombination-r17, where the mapping is given in Table 36.

Table 36: codebook parameter configuration for alpha, M and beta

In one embodiment (vi.5), the UE is configured with a combination of parameters (α, M) from the set (S) _υ Beta), wherein the set comprises combinations such thatM _υ E {1,2}, and +.>The set of all possible parameter combinations is shown in table 33. In one example, M _υ ＝M。

Table 37

/>

In one example (vi.5.1), the set (S) includes all parameter combinations (table 37).

In one example (vi.5.2), the set (S) comprises a subset (S1) of parameter combinations, wherein the subset (S1) comprises up to (at most or less than or equal to) 8 parameter combinations. At least one of the following examples (examples vi.1.2.1 to vi.1.2.9, examples vi.2.2.1 to vi.2.2.9, examples vii.3.2.1 to vi.3.2.9) may be used. Or, N.gtoreq.1 combinations in these examples are replaced by N combinations from D1 to D6.

Any of the above described variant embodiments may be utilized independently or in combination with at least one other variant embodiment.

Fig. 13 illustrates a flow chart of a method 1300 for operating a User Equipment (UE), such as may be performed by a UE such as UE 116, in accordance with an embodiment of the present disclosure. The embodiment of the method 1300 illustrated in fig. 13 is for illustration only. Fig. 13 is not intended to limit the scope of the present disclosure to any particular implementation.

As illustrated in fig. 13, method 1300 begins at step 1302. In step 1302, a UE (e.g., 111-116 illustrated in fig. 1) receives configuration information regarding Channel State Information (CSI) reporting, the configuration information including codebook parameters (M, α, β), wherein: m is the number of frequency domain basis vectors, α is a number of 1 and β is a number of 1.

In step 1304, the UE identifies values of M, α, and β.

In step 1306, the UE determines a value K based on α ₁ Wherein K is ₁ Is the number of CSI reference signal (CSI-RS) ports selected from the total of P CSI-RS ports.

In step 1308, the UE determines a maximum number of non-zero coefficients based on β.

In step 1310, the UE is based on M, K ₁ The maximum number of non-zero coefficients and the value of (c) to determine the CSI report.

In step 1312, the UE transmits a CSI report.

In one embodiment, codebook parameters (M, α, β) are jointly configured via a single Radio Resource Control (RRC) parameter paramCombination-r 17.

In one embodiment, the mapping between codebook parameters (M, α, β) and parameters paramCombination-r17 is based on a table given by

paramCombination-r17	M	α	β
				X1	1	3/4	1/2
X2	1	1	1/2
				X3	1	1	3/4
X4	1	1	1
				X5	2	1/2	1/2
X6	2	3/4	1/2
				X7	2	1	1/2
X8	2	1	3/4

Wherein the UE is configured with a value of the parameter paramCombination-r17, which is configured from a set of values { X1, X2, …, X8 }.

In one embodiment, when P e {4,12}, the undesirable UE is configured with a paramCombination-r17=indicationX1 or X6 of (C).

In one embodiment, when p=4 and the allowed rank value of the CSI report includes 3 or 4, the undesirable UE is configured with a paramcoding-r17=indicationX5 of (c).

In one embodiment, when p=4, and paramCombination-r17=indicatesIs not expected to be configured with an allowed rank value for CSI reporting comprising 3 or 4.

In one embodiment, whenOr 3/4, the CSI report includes an indicator i indicating the CSI-RS port selection vector _1,2 And when α=1, the CSI report does not include the indicator i _1,2 。

Fig. 14 illustrates a flow chart of another method 1400, such as may be performed by a Base Station (BS), such as BS 102, in accordance with an embodiment of the disclosure. The embodiment of method 1400 illustrated in fig. 14 is for illustration only. Fig. 14 is not intended to limit the scope of the present disclosure to any particular implementation.

As illustrated in fig. 14, method 1400 begins at step 1402. In step 1402, the BS (e.g., 101 to 103 illustrated in fig. 1) generates configuration information regarding Channel State Information (CSI) reports, the configuration information including codebook parameters (M, α, β), wherein: m is the number of frequency domain basis vectors, α is a number of 1 and β is a number of 1.

In step 1404, the BS transmits configuration information regarding CSI reports.

In step 1406, the BS receives a CSI report, wherein the CSI report is based on M, K ₁ Wherein the maximum number of non-zero coefficients is beta-based, and wherein K ₁ Is based on alpha and is the number of CSI reference signal (CSI-RS) ports selected from a total of P CSI-RS ports.

Wherein the value of parameter paramCombination-r17 is configured from the set of values { X1, X2, …, X8 }.

In one embodiment, when P ε {4,12}, the parameter paramCombination-r17 cannot take an indication The value X1 or X6 of (a).

In one embodiment, when p=4 and the allowable rank value of the CSI report includes 3 or 4, the parameter paramCombination-r17 cannot take an indicationIs a value X5 of (2).

The above flow diagrams illustrate example methods that may be implemented in accordance with the principles of the present disclosure, and various changes may be made to the methods illustrated in the flow diagrams herein. For example, while shown as a series of steps, individual steps in each figure may overlap, occur in parallel, occur in a different order, or occur multiple times. In another example, steps may be omitted or replaced by other steps.

Although the present disclosure has been described by way of exemplary embodiments, various changes and modifications may be suggested to one skilled in the art. The disclosure is intended to embrace such alterations and modifications that fall within the scope of the appended claims. Any description of the present application should not be construed as implying that any particular element, step, or function is a essential element which must be included in the scope of the claims. The scope of patented subject matter is defined by the claims.

Claims

1. A method performed by a User Equipment (UE) in a wireless communication system, the method comprising:

receiving configuration information about Channel State Information (CSI) reports, the configuration information comprising codebook parameters (M, α, β), wherein M is the number of frequency domain basis vectors, α is a number of 1 and β is a number of 1;

identifying the values M, α, β;

determining a value K based on alpha ₁ Wherein K is ₁ A number of CSI reference signal (CSI-RS) ports selected from the total P CSI-RS ports;

determining a maximum number of non-zero coefficients based on β;

based on M, K ₁ Determining the CSI report with the maximum number of non-zero coefficients; and

and sending the CSI report.

2. The method of claim 1, wherein the codebook parameters M, a, β are jointly configured via a single Radio Resource Control (RRC) parameter,

wherein the mapping between the codebook parameters M, alpha, beta and the RRC parameters is based on a table given by

RRC parameters M α β X1 1 3/4 1/2 X2 1 1 1/2 X3 1 1 3/4 X4 1 1 1 X5 2 1/2 1/2 X6 2 3/4 1/2 X7 2 1 1/2 X8 2 1 3/4

，

And is also provided with

Wherein the UE is configured with a value of the RRC parameter, the value being configured from a set of values { X1, X2, …, X8 }.

3. The method according to claim 2, wherein:

the RRC parameter is not set to indicate when P∈ {4,12 } A value of X1 or X6; or (b)

The RRC parameter is not set to indicate when p=4And the allowed rank value of the CSI report includes 3 or 4.

4. The method of claim 1, wherein, whenOr 3/4, the CSI report includes an indicator indicating a CSI-RS port selection vector, and when α=1, the CSI report does not include the indicator.

5. A method performed by a base station in a wireless communication system, the method comprising:

generating configuration information about Channel State Information (CSI) reports, the configuration information comprising codebook parameters M, α, β, wherein M is the number of frequency domain basis vectors, α is a number of 1 and β is a number of 1;

transmitting the configuration information regarding the CSI report; and

the CSI report is received and the received data is transmitted,

wherein the CSI report is based on M, K ₁ And the maximum number of non-zero coefficients,

wherein the maximum number of non-zero coefficients is beta-based and

wherein K is ₁ Is alpha-based and is the number of CSI reference signal (CSI-RS) ports selected from a total of P CSI-RS ports.

6. The base station of claim 5, wherein the codebook parameters M, a, β are jointly configured via a single Radio Resource Control (RRC) parameter,

，

And is also provided with

7. The method according to claim 6, wherein:

the RRC parameter is not set to indicate when P∈ {4,12 }Of the value X1 or X6, or

8. The method of claim 5, wherein, whenOr 3/4, the CSI report includes an indicator indicating a CSI-RS port selection vector, and when α=1, the CSI report does not include the indicator.

9. A User Equipment (UE) in a wireless communication system, the UE comprising:

a transceiver; and

a controller configured to:

receiving, via the transceiver, configuration information regarding Channel State Information (CSI) reporting, the configuration information including codebook parameters M, α, β, wherein M is a number of frequency domain basis vectors, α is a number of 1 or less, and β is a number of 1 or less;

the identification values M, a, β,

determining a value K based on alpha ₁ Wherein K is ₁ Is the number of CSI reference signal (CSI-RS) ports selected from the total P CSI-RS ports,

the maximum number of non-zero coefficients is determined based on beta,

based on M, K ₁ : determines the CSI report by the maximum number of non-zero coefficients and

the CSI report is sent via the transceiver.

10. The UE of claim 9, wherein the codebook parameters M, a, β are jointly configured via a single Radio Resource Control (RRC),

，

And is also provided with

11. The UE of claim 10, wherein:

12. The UE of claim 9, wherein, whenOr 3/4, the CSI report includes an indicator indicating a CSI-RS port selection vector, and when α=1, the CSI report does not includeThe indicator.

13. A base station in a wireless communication system, the base station comprising:

a transceiver; and

a controller configured to:

generating configuration information for a Channel State Information (CSI) report, the configuration information comprising codebook parameters M, a, beta, wherein M is the number of frequency domain basis vectors, a is a number of 1 and beta is a number of 1,

send the configuration information regarding the CSI report via the transceiver, and

the CSI report is received via the transceiver,

wherein the maximum number of non-zero coefficients is beta-based and

14. The base station of claim 13, wherein the codebook parameters M, a, β are jointly configured via a single Radio Resource Control (RRC) parameter,

，

And is also provided with

Wherein the value of the RRC parameter is configured from a set of values { X1, X2, …, X8 }.

15. The base station of claim 14, wherein:

The RRC parameter is not set to indicate when p=4And the allowed rank value of the CSI report includes 3 or 4, and

wherein whenOr 3/4, the CSI report includes an indicator indicating a CSI-RS port selection vector, and when α=1, the CSI report does not include the indicator.