Method and apparatus for reporting calibration in a wireless communication system

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Apparatuses and methods for reporting calibration. A method performed by a UE includes receiving, from a base station, information on a channel state information (CSI) report, the information indicating an antenna group; determining a reference antenna group based on the information; determining calibration-related information (CLI) related to the antenna group; and transmitting, to the base station, a CSI report including a CLI indicator indicating the reference antenna group and the CLI.

Description

Technical Field

[0001] This disclosure generally relates to wireless communication systems, and more specifically, to apparatus and methods for reporting calibration. Background Technology

[0002] 5G mobile communication technology defines a wide frequency band, enabling high transmission rates and new services. It can be implemented not only in "sub-6GHz" bands such as 3.5GHz, but also in "above 6GHz" bands, including 28GHz and 39GHz, known as mmWave. Furthermore, 6G mobile communication technology (referred to as "super 5G systems") is being considered in terahertz bands (e.g., the 95GHz to 3THz band) to achieve transmission rates fifty times faster than 5G and ultra-low latency one-tenth that of 5G.

[0003] At the outset of 5G mobile communication technology development, to support services and meet performance requirements associated with enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), and massive machine-type communication (mMTC), standardization was underway regarding beamforming and massive MIMO. This included mitigating radio wave path loss in millimeter waves and increasing transmission distance; parameter sets supporting dynamic operation (e.g., operating multiple subcarrier spacings) for efficient utilization of millimeter wave resources and time slot formats; initial access technologies to support multi-beam transmission and broadband; the definition and operation of the bandwidth portion (BWP); new channel coding methods such as LDPC (low-density parity-check) codes for large-volume data transmission and polar codes for highly reliable transmission of control information; L2 preprocessing; and new channel coding methods for transmitting and receiving data. Additionally, network slicing was being developed to provide dedicated networks for specific services.

[0004] Currently, given the services that 5G mobile communication technology needs to support, discussions are underway regarding improvements and performance enhancements to the initial 5G mobile communication technology. Physical layer standardization already exists for technologies such as V2X (Vehicle-to-Everything), NR-U (New Radio Unlicensed), NR UE Power Saving, Non-Terrestrial Network (NTN), and positioning. V2X is used to assist autonomous vehicles in making driving decisions and enhancing user convenience based on vehicle location and status information transmitted by the vehicle. NR-U aims to comply with system operations related to various regulations in unlicensed frequency bands. NR UE Power Saving and Non-Terrestrial Network (NTN) are UE-satellite direct communication used to provide coverage in areas where communication with terrestrial networks is impossible.

[0005] In addition, standardization is underway for air interface architectures / protocols such as those for supporting new services through interoperability and convergence with other industries in the Industrial Internet of Things (IIoT); for providing nodes for network service area extension by supporting wireless backhaul and access links in an integrated manner; mobility enhancements including conditional handover and DAPS (Dual Active Stack) handover; and for two-step random access (2-step RACH for NR) to simplify the random access process. Standardization is also underway for 5G baseline architectures (e.g., service-based architectures or service-based interfaces) for combining Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and for system architectures / services for Mobile Edge Computing (MEC) based on UE location reception services.

[0006] With the commercialization of 5G mobile communication systems, the number of connected devices will increase exponentially, necessitating enhanced functionality and performance of 5G mobile communication systems, as well as integrated operation of connected devices. To this end, new research related to extended reality (XR) is being undertaken to effectively support AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality), and other technologies by leveraging artificial intelligence (AI) and machine learning (ML), AI service support, metaverse service support, and drone communication, while also improving 5G performance and reducing complexity.

[0007] Furthermore, this development of 5G mobile communication systems will not only serve as the foundation for developing new waveforms for providing coverage in the terahertz band of 6G mobile communication technology, such as full-dimensional MIMO (FD-MIMO), multi-antenna transmission technologies like array antennas and massive MIMO, metamaterial-based lenses and antennas for improving terahertz band signal coverage, and high-dimensional spatial multiplexing technologies using OAM (orbital angular momentum) and RIS (reconfigurable smart surfaces), but will also serve as the foundation for developing full-duplex technologies to improve the frequency efficiency of 6G mobile communication technology and enhance system networks, AI-based communication technologies to achieve system optimization and internalize end-to-end AI support by leveraging satellites and AI (artificial intelligence) from the design stage, and next-generation distributed computing technologies to deliver services with complexity exceeding the operational capabilities of UEs by utilizing ultra-high-performance communication and computing resources.

[0008] Wireless communication is already one of the most successful innovations in modern history. Recently, the number of users of wireless communication services has exceeded five billion and continues to grow rapidly. The demand for wireless data traffic is increasing rapidly due to the growing popularity of smartphones and other mobile data devices (such as tablets, notebook computers, netbooks, e-book readers, and machine-type devices) among consumers and businesses. To meet the high growth of mobile data services and support new applications and deployments, improvements in radio interface efficiency and coverage are crucial. To meet the increased demand for wireless data services since the deployment of 4G communication systems, and to enable various vertical applications, 5G communication systems have been developed and are currently being deployed. Summary of the Invention

[0009] [Technical Solution]

[0010] This disclosure relates to reports used for calibration.

[0011] In one embodiment, a user equipment (UE) is provided. The UE includes: a transceiver; and at least one processor coupled to the transceiver and configured to: receive information from a base station regarding a channel state information (CSI) report indicating an antenna group, determine a reference antenna group based on the information, determine calibration-related information (CLI) associated with the antenna group, and send a CSI report to the base station including a CLI indicator indicating the reference antenna group and the CLI.

[0012] In another embodiment, a base station (BS) is provided. The BS includes a transceiver; and at least one processor coupled to the transceiver and configured to: send information about a channel state information (CSI) report to a user equipment (UE) indicating an antenna group, and receive a CSI report from the UE, the CSI report including a calibration-related information (CLI) indicator indicating a reference antenna group and a CLI, wherein the reference antenna group is based on the information, and wherein the CLI is associated with the antenna group.

[0013] In another embodiment, a method performed by a UE is provided. The method includes: receiving information from a base station regarding a channel state information (CSI) report, which indicates an antenna group; determining a reference antenna group based on the information; determining calibration-related information (CLI) associated with the antenna group; and sending a CSI report to the base station including a CLI indicator indicating the reference antenna group and the CLI.

[0014] In another embodiment, a method performed by a BS is provided. The method includes: sending information about a channel state information (CSI) report to a user equipment (UE), the information indicating an antenna group; and receiving a CSI report from the UE, the CSI report including a CLI indicator indicating a reference antenna group and calibration-related information (CLI), wherein the reference antenna group is based on the information, and wherein the CLI is associated with the antenna group.

[0015] Other technical features will be obvious to those skilled in the art based on the following figures, description and claims.

[0016] Before proceeding with the detailed description below, it may be advantageous to define certain words and phrases used throughout this patent document. The term “coupled” and its derivatives refer to any direct or indirect communication between two or more elements, regardless of whether these elements are physically in contact with each other. The terms “transmit,” “receive,” and “communicate,” and their derivatives include both direct and indirect communication. The terms “comprising” and “including,” and their derivatives, mean including but not limited to. The term “or” is inclusive, meaning and / or. The phrase “associated with,” and its derivatives, mean including, being included in, interconnected with, containing, being contained within, connected to or connected to, coupled to or coupled with, able to communicate with, cooperate with, interleaved, juxtaposed, proximate, bound to or bound to, having, possessing the properties of, having a relationship to or with, etc. The term “controller” means any device, system, or part 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, local or remote. When used with a list of items, the phrase "at least one" means that different combinations of one or more of the listed items may be used, and it may be necessary to use only one item from the list. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C.

[0017] Furthermore, the various functions described below can be implemented or supported by one or more computer programs, each computer program being formed by computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, procedures, functions, objects, classes, instances, associated data, or portions thereof suitable for implementation in appropriate 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 accessible by a computer, such as read-only memory (ROM), random access memory (RAM), hard disk drive, optical disc (CD), digital video disc (DVD), or any other type of storage. "Non-transitory" computer-readable media does not include wired, wireless, optical, or other communication links that transmit transient electrical or other signals. Non-transitory computer-readable media includes media in which data can be permanently stored and media in which data can be stored and later rewritten, such as rewritable optical discs or erasable memory devices.

[0018] Definitions of certain other words and phrases are provided throughout this patent document. Those skilled in the art will understand that, in many cases (if not most), such definitions apply to the prior and future use of the words and phrases defined in this way. Attached Figure Description

[0019] To gain a more complete understanding of this disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, wherein like reference numerals denote like parts:

[0020] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown;

[0021] Figure 2 An example gNodeB (gNB) is shown according to an embodiment of this disclosure;

[0022] Figure 3 An example UE is shown according to an embodiment of this disclosure;

[0023] Figures 4a and 4b illustrate examples of wireless transmission and reception paths according to embodiments of the present disclosure;

[0024] Figure 5 An example of a transmitter structure for beamforming according to an embodiment of the present disclosure is shown;

[0025] Figure 6 An example of a transmitter structure for a physical downlink shared channel (PDSCH) in a subframe is shown according to an embodiment of the present disclosure;

[0026] Figure 7 An example of a receiver structure for a PDSCH in a subframe is shown according to an embodiment of the present disclosure;

[0027] Figure 8 An example of a transmitter structure for a Physical Uplink Shared Channel (PUSCH) in a subframe is shown according to an embodiment of the present disclosure;

[0028] Figure 9 An example of a receiver structure for a PUSCH in a subframe is shown according to an embodiment of the present disclosure;

[0029] Figure 10 A diagram showing an antenna port layout according to an embodiment of the present disclosure;

[0030] Figure 11 According to embodiments of this disclosure, example co-location and distributed antenna group (AG) / port group (PG) serving a mobile UE are shown.

[0031] Figure 12 According to embodiments of this disclosure, an example of a timeline for a UE to receive a non-zero power (NZP) CSI reference signal (CSI-RS) resource burst is shown;

[0032] Figure 13 An example of a timeline for a CSI-RS burst instance for partitioning according to an embodiment of this disclosure is shown;

[0033] Figure 14 Examples of resource block (RB) and subband (SB) partitions according to embodiments of this disclosure are shown;

[0034] Figure 15 Examples of SD units, frequency domain (FD) units, and time domain (TD) units according to embodiments of the present disclosure are shown;

[0035] Figure 16 An example signal stream for a calibration mechanism according to an embodiment of the present disclosure is shown;

[0036] Figure 17 An example of a one-to-one RS association according to an embodiment of the present disclosure is shown;

[0037] Figure 18 Examples of many-to-one RS associations according to embodiments of the present disclosure are shown;

[0038] Figure 19 An example of a one-to-many RS association according to an embodiment of the present disclosure is shown;

[0039] Figure 20 An example of N one-to-one RS associations according to embodiments of this disclosure is shown;

[0040] Figure 21 An example of a many-to-one RS association according to an embodiment of the present disclosure is shown;

[0041] Figure 22 Examples of N one-to-many RS associations according to embodiments of the present disclosure are shown;

[0042] Figure 23 Examples of N many-to-one RS associations according to embodiments of the present disclosure are shown;

[0043] Figure 24 Embodiments according to this disclosure are shown One-to-one RS association, One-to-many RS association and Example of a many-to-one RS association;

[0044] Figure 25 An example of an N-bit bitmap indicator for triggering / indicating a subset of N DL RS / UL RS associations, according to an embodiment of the present disclosure, is shown;

[0045] Figure 26 An example of a one-to-one PG / RS association according to an embodiment of this disclosure is shown;

[0046] Figure 27 Examples of many-to-one PG / RS associations according to embodiments of the present disclosure are shown;

[0047] Figure 28 An example of a one-to-many PG / RS association according to an embodiment of this disclosure is shown;

[0048] Figure 29 Examples of N one-to-one PG / RS associations according to embodiments of this disclosure are shown;

[0049] Figure 30 An example of a many-to-one PG / RS association according to an embodiment of the present disclosure is shown;

[0050] Figure 31 Examples of N one-to-many PG / RS associations according to embodiments of the present disclosure are shown;

[0051] Figure 32 Examples of N many-to-one PG / RS associations according to embodiments of the present disclosure are shown;

[0052] Figure 33 Embodiments according to this disclosure are shown One-to-one PG / RS association One-to-many PG / RS association and An example of a many-to-one PG / RS association;

[0053] Figure 34 An example of an N-bit bitmap indicator for triggering / indicating a subset of N DL PG / UL RS associations is shown according to an embodiment of the present disclosure;

[0054] Figure 35 Example diagrams illustrating a calibration reporting process according to embodiments of this disclosure; and

[0055] Figure 36 An example method performed by a UE in a wireless communication system according to an embodiment of the present disclosure is shown. Detailed Implementation

[0056] The following discussion Figure 1-36 The various non-limiting embodiments used to describe the principles of this disclosure in this patent document are for illustrative purposes only and should not be construed as limiting the scope of this disclosure in any way. Those skilled in the art will understand that the principles of this disclosure can be implemented in any suitably arranged system or device.

[0057] To meet the increased demand for wireless data services since the deployment of 4G communication systems, and to enable various vertical applications, 5G / NR communication systems have been developed and are currently being deployed. 5G / NR communication systems are implemented in higher frequency (mmWave) bands (e.g., 28 GHz or 60 GHz bands) to achieve higher data rates, or in lower frequency bands (such as 6 GHz) to achieve robust coverage and mobility support. To reduce radio wave propagation loss and increase transmission distance, beamforming, massive MIMO, full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive MIMO technologies are discussed in 5G / NR communication systems.

[0058] In addition, in 5G / NR communication systems, development is underway to improve system networks based on advanced small cells, cloud radio access networks (RANs) ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, coordinated multipoint (CoMP), and receiver interference cancellation.

[0059] The discussion of 5G systems and their associated frequency bands is for informational purposes only, as some embodiments of this disclosure can be implemented in 5G systems. However, this disclosure is not limited to 5G systems or their associated frequency bands, and embodiments of this disclosure can be utilized in combination with any frequency band. For example, aspects of this disclosure can also be applied to 5G communication systems, 6G, or even newer deployments using terahertz (THz) frequency bands.

[0060] The following literature and standards descriptions are incorporated herein by reference as if fully set forth herein: [Reference 1] 3GPP TS 36.211 v17.4.0, “E-UTRA, Physical channels and modulation” [Reference 2] 3GPP TS 36.212 v18.0.0, “E-UTRA, Multiplexing and channel coding” [Reference 3] 3GPP TS 36.213 v18.0.0, “E-UTRA, Physical layer procedures” [Reference 4] 3GPP TS 36.321 v17.6.0, “E-UTRA, Media Access Control (MAC) Protocol Specification” [Reference 5] 3GPP TS 36.331 v17.6.0, “E-UTRA, Radio Resource Control (RRC) Protocol Specification” [Reference 6] 3GPP TR 22.891 V1.2.0; [Reference 7] 3GPP TS 38.212v18.0.0, “E-UTRA, NR, multiplexing and channel coding;” [Reference 8] 3GPP TS 38.214 v18.0.0, “E-UTRA, NR, physical layer procedures for data;” and [Reference 9] 3GPP TS 38.211V18.0.0, “E-UTRA, NR, physical channels and modulation.”

[0061] The following Figure 1-3 Various embodiments of orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) communication technologies implemented in wireless communication systems are described. Figure 1-3 The description does not imply any physical or architectural limitations on how the different embodiments can be implemented. Different embodiments of this disclosure can be implemented in any suitably arranged communication system.

[0062] Figure 1 An example wireless network 100 according to an embodiment of the present disclosure is shown. Figure 1 The embodiment of the wireless network 100 shown is for illustrative purposes only. Other embodiments of the wireless network 100 may be used without departing from the scope of this disclosure.

[0063] like Figure 1 As shown, the wireless network 100 includes gNB 101 (e.g., a base station, BS), gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one network 130 (such as the Internet, a proprietary Internet Protocol (IP) network, or other data network).

[0064] gNB 102 provides wireless broadband access to network 130 to a first plurality of user equipments (UEs) within its coverage area 120. The first plurality of UEs includes UE 111, which may be located in a small business; UE 112, which may be located in an enterprise; UE 113, which may be a WiFi hotspot; UE 114, which may be located in a first residence; UE 115, which may be located in a second residence; and UE 116, which may be a mobile device, such as a cellular phone, wireless laptop computer, wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 to a second plurality of UEs within its coverage area 125. The second plurality of UEs includes UE 115 and UE 116. In some embodiments, one or more of gNBs 101-103 may communicate with each other and with UEs 111-116 using 5G / NR, Long Term Evolution (LTE), LTE-A Advanced, WiMAX, WiFi, or other wireless communication technologies.

[0065] Depending on the network type, the term "base station" or "BS" can refer to any component (or set of components) configured to provide wireless access to a network, such as a transmitting point (TP), a transmitting-receiving point (TRP), an enhanced base station (eNodeB or eNB), a 5G / NR base station (gNB), a macro cell, a femtocell, a WiFi access point (AP), or other wirelessly enabled equipment. A base station can provide wireless access according to one or more wireless communication protocols, such as 5G / NR 3rd Generation Partnership Project (3GPP) NR, Long Term Evolution (LTE), LTE-Advanced (LTE-A), High Speed ​​Packet Access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc. For convenience, the terms "BS" and "TRP" are used interchangeably in this patent document to refer to network infrastructure components that provide wireless access to remote terminals. Furthermore, depending on the network type, the term "user equipment" or "UE" can refer to any component, such as a "mobile station," "subscriber station," "remote terminal," "wireless terminal," "receiving point," or "user device." For convenience, the terms “user equipment” and “UE” are used in this patent document to refer to a remote wireless device for wireless access to a BS, whether the UE is a mobile device (such as a mobile phone or smartphone) or is generally considered to be a fixed device (such as a desktop computer or vending machine).

[0066] The dashed lines indicate the approximate extent of coverage areas 120 and 125, and are shown as approximately circular for illustrative and explanatory purposes only. It should be clearly understood that coverage areas associated with the gNB (such as coverage areas 120 and 125) may have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment associated with natural and man-made obstacles.

[0067] As described in more detail below, one or more of UEs 111-116 include circuitry, programming, or a combination thereof for reporting calibration. In some embodiments, one or more of BSs 101-103 include circuitry, programming, or a combination thereof to support reporting for calibration.

[0068] although Figure 1 An example of a wireless network is shown, but more can be found on... Figure 1 Various modifications can be made. For example, the wireless network 100 can include any number of gNBs and any number of UEs in any suitable arrangement. Furthermore, gNB 101 can communicate directly with any number of UEs and provide these UEs with wireless broadband access to network 130. Similarly, each gNB 102-103 can communicate directly with network 130 and provide UEs with direct wireless broadband access to network 130. Additionally, gNBs 101, 102, and / or 103 can provide access to other or additional external networks (such as external telephone networks or other types of data networks).

[0069] Figure 2 An example gNB 102 is shown according to an embodiment of the present disclosure. Figure 2 The embodiment of gNB 102 shown is for illustrative purposes only, and Figure 1 gNBs 101 and 103 can have the same or similar configurations. However, gNBs have a wide variety of configurations, and Figure 2 This disclosure is not intended to limit the scope of any particular implementation of gNB.

[0070] like Figure 2 As shown, gNB 102 includes multiple antennas 205a-205n, multiple transceivers 210a-210n, a controller / processor 225, a memory 230, and a backhaul or network interface 235.

[0071] Transceivers 210a-210n receive incoming radio frequency (RF) signals from antennas 205a-205n, such as signals transmitted by a UE in wireless network 100. Transceivers 210a-210n down-convert the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are processed by receive (RX) processing circuitry in transceivers 210a-210n and / or controller / processor 225, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. Controller / processor 225 can further process the baseband signals.

[0072] The transmit (TX) processing circuitry in transceivers 210a-210n and / or controller / processor 225 receives analog or digital data (such as voice data, network data, email, or interactive video game data) from controller / processor 225. The TX processing circuitry encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. Transceivers 210a-210n up-convert the baseband or IF signal into an RF signal transmitted via antennas 205a-205n.

[0073] The controller / processor 225 may include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 225 may control the transceivers 210a-210n to receive uplink (UL) channel signals and transmit downlink (DL) channel signals according to well-known principles. The controller / processor 225 may also support additional functions, such as more advanced wireless communication capabilities. For example, the controller / processor 225 may support beamforming or directional routing operations, where outgoing / incoming signals from / to multiple antennas 205a-205n are weighted differently to effectively guide outgoing signals in a desired direction. As another example, the controller / processor 225 may support methods for CSI configuration in TDD scenarios. The controller / processor 225 may support any of a variety of other functions within the gNB 102.

[0074] The controller / processor 225 is also capable of executing programs and other processes residing in the memory 230, such as processes for supporting calibration reports. The controller / processor 225 can move data into or out of the memory 230 as needed for the execution process.

[0075] The controller / processor 225 is also coupled to a backhaul or network interface 235. The backhaul or network interface 235 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or over a network. Interface 235 can support communication via any suitable wired or wireless connection. For example, when the gNB 102 is implemented as part of a cellular communication system (such as a cellular communication system supporting 5G / NR, LTE, or LTE-A), interface 235 can allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, interface 235 can allow the gNB 102 to communicate via a wired or wireless local area network or via a wired or wireless connection to a larger network (such as the Internet). Interface 235 includes any suitable architecture supporting communication via wired or wireless connections, such as Ethernet or a transceiver.

[0076] 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.

[0077] although Figure 2 An example of gNB 102 is shown, but it is possible to see more. Figure 2 Various changes can be made. For example, gNB 102 can include any number of Figure 2 Each component shown. Furthermore, Figure 2 The various components can be combined, further subdivided, or omitted, and additional components can be added as needed.

[0078] Figure 3 An example UE 116 is shown according to an embodiment of the present disclosure. Figure 3 The embodiment of UE 116 shown is for illustrative purposes only, and Figure 1 UEs 111-115 can have the same or similar configurations. However, UEs have a wide variety of configurations, and Figure 3 This disclosure is not intended to limit the scope of any particular implementation of the UE.

[0079] like Figure 3 As shown, UE 116 includes antennas (or more) 305, transceivers (or more) 310, and microphone 320. UE 116 also includes a speaker 330, a processor 340, an input / output (I / O) interface (IF) 345, an input 350, a display 355, and memory 360. Memory 360 includes an operating system (OS) 361 and one or more applications 362.

[0080] Transceiver(s) 310 receives incoming RF signals transmitted by a gNB of wireless network 100 from antenna(s) 305. Transceiver(s) 310 down-converts the incoming RF signals to generate intermediate frequency (IF) or baseband signals. The IF or baseband signals are processed by RX processing circuitry in transceiver(s) 310 and / or processor 340, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. The RX processing circuitry sends the processed baseband signals to speaker 330 (e.g., for voice data) or to processor 340 (e.g., for web browsing data).

[0081] The TX processing circuitry in transceiver(s) 310 and / or processor 340 receives analog or digital voice data from microphone 320 or other outgoing baseband data (such as network data, email, or interactive video game data) from processor 340. The TX processing circuitry encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. Transceiver(s) 310 up-converts the baseband or IF signal into an RF signal transmitted via antenna 305.

[0082] Processor 340 may include one or more processors or other processing devices and executes OS 361 stored in memory 360 to control the overall operation of UE 116. For example, processor 340 may control transceiver 310 to receive DL channel signals and transmit UL channel signals according to well-known principles. In some embodiments, processor 340 includes at least one microprocessor or microcontroller.

[0083] Processor 340 is also capable of executing other processes and programs residing in memory 360. For example, processor 340 can execute a process for reporting calibration as described in embodiments of this disclosure. Processor 340 can move data into or out of memory 360 as needed to execute the process. In some embodiments, processor 340 is configured to execute application 362 based on OS 361 or in response to signals received from a gNB or operator. Processor 340 is also coupled to I / O interface 345, which provides UE 116 with the ability to connect to other devices, such as laptop computers and handheld computers. I / O interface 345 is the communication path between these accessories and processor 340.

[0084] The processor 340 is also coupled to an input 350 and a display 355. The input 350 includes, for example, a touchscreen, a keypad, etc. The operator of the UE 116 can use the input 350 to input data into the UE 116. The display 355 may be a liquid crystal display, a light-emitting diode display, or other display capable of displaying text and / or at least limited graphics (such as from a website).

[0085] The memory 360 is coupled to the processor 340. A portion of the memory 360 may include random access memory (RAM), and another portion of the memory 360 may include flash memory or other read-only memory (ROM).

[0086] although Figure 3 An example of UE 116 is shown, but it is possible to see... Figure 3 Make various changes. For example, Figure 3 The various components can be combined, further subdivided, or omitted, and additional components can be added as needed. As a specific example, processor 340 can be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). In another example, transceivers 310 may include any number of transceivers and signal processing chains and can be connected to any number of antennas. Furthermore, although... Figure 3 The UE116 is shown configured as a mobile phone or smartphone, but the UE can be configured to operate as other types of mobile or fixed devices.

[0087] Figure 4A and Figure 4B Examples of wireless transmit and receive paths 400 and 450 according to embodiments of the present disclosure are shown respectively. For example, transmit path 400 may be described as being implemented in a gNB (such as gNB 102), while receive path 450 may be described as being implemented in a UE (such as UE 116). However, it should be understood that receive path 450 may be implemented in a gNB, and transmit path 400 may be implemented in a UE. In some embodiments, transmit path 400 is configured to report calibration, as described in embodiments of the present disclosure.

[0088] like Figure 4AAs shown, the transmit path 400 includes a channel coding and modulation block 405, a serial-to-parallel (S to P) block 410, an N-size inverse fast Fourier transform (IFFT) block 415, a parallel-to-serial (P to S) block 420, a cyclic prefix addition block 425, and an up-converter (UC) 430. The receive path 450 includes a down-converter (DC) 455, a cyclic prefix removal block 460, an S to P block 465, an N-size fast Fourier transform (FFT) block 470, a parallel-to-serial (P to S) block 475, and a channel decoding and demodulation block 480.

[0089] In transmit path 400, channel coding and modulation block 405 receives a set of information bits, applies coding (such as low-density parity-check (LDPC) coding), and modulates the input bits (such as using quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) to generate a sequence of frequency-domain modulated symbols. Serial-to-parallel block 410 converts (such as demultiplexes) the serial modulated symbols into parallel data to generate N parallel symbol streams, where N is the IFFT / FFT size used in the gNB and UE. IFFT block 415 of size N performs an IFFT operation on the N parallel symbol streams to generate a time-domain output signal. Parallel-to-serial block 420 converts (such as multiplexes) the parallel time-domain output symbols from IFFT block 415 of size N to generate a serial time-domain signal. Cyclic prefix addition block 425 inserts a cyclic prefix into the time-domain signal. Upconverter 430 modulates (such as upconverts) the output of cyclic prefix addition block 425 to an RF frequency for transmission via the wireless channel. The signal can also be filtered at the baseband before being switched to the RF frequency.

[0090] like Figure 4B As shown, downconverter 455 downconverts the received signal to the baseband frequency, and cyclic prefix removal block 460 removes the cyclic prefix to generate a serial time-domain baseband signal. Serial-to-parallel block 465 converts the time-domain baseband signal into a parallel time-domain signal. FFT block 470 of size N performs an FFT algorithm to generate N parallel frequency-domain signals. (P to S) block 475 converts the parallel frequency-domain signals into a sequence of modulated data symbols. Channel decoding and demodulation block 480 demodulates and decodes the modulated symbols to recover the original input data stream.

[0091] Each of gNBs 101-103 can implement a transmission path 400 similar to that sent to UEs 111-116 in the downlink, and a reception path 450 similar to that received from UEs 111-116 in the uplink. Similarly, each of UEs 111-116 can implement a transmission path 400 for sending to gNBs 101-103 in the uplink, and a reception path 450 for receiving from gNBs 101-103 in the downlink.

[0092] Figure 4A and 4B Each component in the system can be implemented using only hardware or a combination of hardware and software / firmware. As a specific example, Figure 4A and 4B At least some components can be implemented in software, while others can be implemented using configurable hardware or a combination of software and configurable hardware. For example, FFT block 470 and IFFT block 415 can be implemented as configurable software algorithms, where the value of size N can be modified depending on the implementation.

[0093] Furthermore, although described as using FFT and IFFT, this is merely illustrative and should not be construed as limiting the scope of this disclosure. Other types of transforms, such as the Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions, may be used. It should be understood that for the DFT and IDFT functions, the value of the variable N can be any integer (e.g., 1, 2, 3, 4, etc.), while for the FFT and IFFT functions, the value of the variable N can be any integer that is a power of 2 (e.g., 1, 2, 4, 8, 16, etc.).

[0094] although Figure 4A and Figure 4B Examples of wireless transmission path 400 and wireless reception path 450 are shown respectively, but it is possible to... Figure 4A and Figure 4B Make various changes. For example, you can combine, further subdivide, or omit. Figure 4A and 4B It includes various components and allows for the addition of additional components as needed. Furthermore, Figure 4A and 4B This is intended to illustrate examples of the types of transmit and receive paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communication in a wireless network.

[0095] Figure 5 An example of a transmitter structure 500 for beamforming according to an embodiment of this disclosure is shown. In some embodiments, one or more of gNB 102 or UE 116 include transmitter structure 500. For example, one or more of antenna 205 and its associated system or antenna 305 and its associated system may be included in transmitter structure 500. This example is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0096] In hybrid analog-digital beamforming, analog beamforming corresponds to the "dynamic / variable" virtualization of multiple antenna elements to obtain a single antenna port (or antenna panel). For millimeter-wave bands, although the number of antenna elements can be larger for a given form factor, hardware limitations (e.g., the feasibility of mounting a large number of analog-to-digital converters (ADCs) / digital-to-analog converters (DACs) at millimeter-wave frequencies) limit the number of CSI-RS ports corresponding to the number of digital precoding ports. Figure 5 As shown. A CSI-RS port can then be mapped to a large number of antenna elements that can be controlled by a set of analog phase shifters 501. A CSI-RS port can then correspond to a subarray that generates a narrow analog beam through analog beamforming 505. This analog beam can be configured to sweep a wider range of angles 520 by changing the set of phase shifters across symbols or time slots / subframes. The number of subarrays (equal to the number of RF chains) is the same as the number of CSI-RS ports (NCSI-PORT). Digital beamforming unit 510 performs linear combination across NCSI-PORT analog beams to further increase precoding gain. While the analog beam is wideband (and therefore not frequency-selective), digital precoding can vary across frequency subbands or resource blocks. Receiver operation can be envisioned similarly.

[0097] because Figure 5 The transmitter structure 500 utilizes multiple analog beams for transmission and reception (where, for example, one or a few analog beams are selected from a large number of analog beams after a training duration performed occasionally or periodically), hence the term "multi-beam operation" is used to refer to this aspect of the entire system. For illustrative purposes, this includes indicating the assigned DL or ULTX beam (also referred to as "beam indication"), measuring at least one reference signal for calculating and performing beam reporting (also referred to as "beam measurement" and "beam reporting," respectively), and receiving DL or UL transmissions via selecting the corresponding RX beam. Figure 5 The system is also suitable for higher frequency bands, such as >52.6 GHz (also known as frequency range 4 or FR4). In this case, the system can use only analog beams. Due to O2 absorption loss near 60 GHz (an additional loss of ~10 dB per 100 m distance), a larger number and narrower analog beams (and therefore a larger number of radiators in the array) are necessary to compensate for the additional path loss.

[0098] In general, this disclosure relates to wireless communication systems; more specifically, it relates to CSI reports.

[0099] A communication system comprises a downlink (DL) that transmits signals from a base station (BS) or NodeB to a user equipment (UE) and an uplink (UL) that transmits signals from the UE to a receiving point such as a NodeB. A UE (often also called a terminal or mobile station) can be fixed or mobile and can be a cellular phone, personal computer, or automated device. An eNodeB (which is typically a fixed station) can also be referred to as an access point or other equivalent terms. For LTE systems, a NodeB is typically referred to as an eNodeB.

[0100] In communication systems such as LTE, DL signals may include data signals conveying information content, control signals conveying DL control information (DCI), and reference signals (RS), also known as pilot signals. The eNodeB transmits data information via the Physical DL Shared Channel (PDSCH). The eNodeB transmits DCI via the Physical DL Control Channel (PDCCH) or Enhanced PDCCH (EPDCCH) – see also Reference 3. The eNodeB transmits acknowledgment information in the Physical Hybrid ARQ Indicator Channel (PHICH) in response to data block (TB) transmissions from the UE. The eNodeB transmits one or more types of RS, including UE Common RS (CRS), Channel State Information RS (CSI-RS), or Demodulated RS (DMRS). CRS is transmitted over the DL system bandwidth (BW) and can be used by the UE to obtain channel estimates for demodulating data or control information or performing measurements. To reduce CRS overhead, the eNodeB may transmit CSI-RS at a lower density in the time and / or frequency domains than CRS. DMRS can be transmitted only in the BW of the corresponding PDSCH or EPDCCH, and the UE can use DMRS to demodulate data or control information in the PDSCH or EPDCCH respectively. The transmission time interval used for the DL channel is called a subframe (or time slot) and can have a duration of, for example, 1 millisecond.

[0101] The DL signal also includes the transmission of logical channels carrying system control information. The BCCH is mapped to a transport channel called the Broadcast Channel (BCH) when transmitting the Master Information Block (MIB), or to the DL Shared Channel (DL-SCH) when transmitting the System Information Block (SIB) – see also references 3 and 5. Most system information is included in different SIBs transmitted using the DL-SCH. The presence of system information on the DL-SCH in a subframe (or time slot) can be indicated by transmitting the corresponding PDCCH with codewords scrambled with a CRC using a special system information RNTI (SI-RNTI). Alternatively, scheduling information for SIB transmission can be provided in an earlier SIB, and scheduling information for the first SIB (SIB-1) can be provided by the MIB.

[0102] DL resource allocation is performed on a subframe (or time slot) and a set of physical resource blocks (PRBs). A transport bandwidth (BW) consists of frequency resource elements called resource blocks (RBs). Each RB includes... Each subcarrier or resource element (RE) is a unit of one RB on a subframe (or slot). The total number of subcarriers or resource elements (REs) that can be allocated to the UE for PDSCH transmission BW is [number missing]. One RE RB.

[0103] UL signals can include data signals for transmitting data information, control signals for transmitting UL control information (UCI), and UL RS. UL RS includes DMRS and SNR (Sounding RS). The UE only transmits DMRS in the corresponding PUSCH or PUCCH BW. The eNodeB can use DMRS to demodulate data signals or UCI signals. The UE transmits SRS to provide UL CSI to the eNodeB. The UE transmits data information or UCI through the 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 (or slot), it can multiplex both in the PUSCH. UCI includes a Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) message indicating a correct (ACK) or incorrect (NACK) detection or absence of PDCCH detection (DTX) for data TB in the PDSCH, a Scheduling Request (SR) indicating whether the UE has data in its buffer, a Rank Indicator (RI), and Channel State Information (CSI) enabling the eNodeB to perform link adaptation for PDSCH transmission to the UE. The UE also sends a HARQ-ACK message in response to the detection of a PDCCH / EPDCCH indicating the release of a semi-persistent PDSCH (see also Reference 3).

[0104] A UL subframe (or time slot) consists of two time slots. Each time slot includes space for transmitting data information, UCI, DMRS, or SRS. One symbol. The frequency resource unit of the UL system BW is RB. The UE is allocated One RB is used to transmit BW. One RE. For PUCCH, The last subframe (or time slot) symbol can be used to multiplex SRS transmissions from one or more UEs. The number of subframe (or time slot) symbols available for data / UCI / DMRS transmission is... Where the last subframe (or time slot) symbol is used to transmit SRS, then ,otherwise .

[0105] Figure 6 The illustration shows an example of a transmitter structure 600 for PDSCH in a subframe according to various embodiments of the present disclosure. For example, the transmitter structure 600 can be... Figure 1 This is implemented in gNB 102. This example is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0106] like Figure 6 As shown, information bit 610 is encoded by encoder 620, such as a turbo encoder, and modulated by modulator 630, for example using quadrature phase shift keying (QPSK) modulation. Serial-to-parallel (S / P) converter 640 generates M modulation symbols, which are then provided to mapper 650 to map to REs selected by transmission BW for the assigned PDSCH transmission BW by transmission BW selection unit 655. Unit 660 applies inverse fast Fourier transform (IFFT), and the output is then serialized by parallel-to-serial (P / S) converter 670 to create a time-domain signal, filtered by filter 680, and transmitted as signal 690. Additional features such as data scrambling, cyclic prefix insertion, time windowing, interleaving, etc., are well known in the art and are not shown for simplicity.

[0107] Figure 7 The illustration shows an example of a receiver structure 700 for a PDSCH in a subframe according to various embodiments of the present disclosure. For example, the receiver structure 700 may be composed of... Figure 1 This can be implemented using any of UEs 111-116. This example is for illustrative purposes only, and other embodiments may be used without departing from the scope of this disclosure.

[0108] refer to Figure 7 The received signal 710 is filtered by filter 720, the RE 730 for the allocated receive BW is selected by BW selector 735, unit 740 applies Fast Fourier Transform (FFT), and the output is serialized by parallel-to-serial converter 750. Subsequently, demodulator 760 coherently demodulates data symbols by applying a channel estimate obtained from DMRS or CRS (not shown), and decoder 770 (e.g., turbo decoder) decodes the demodulated data to provide an estimate of information data bits 780. For simplicity, additional functions such as time windowing, cyclic prefix removal, descrambling, channel estimation, and deinterleaving are not shown.

[0109] Figure 8 An example of a transmitter structure 800 for PUSCH in a subframe according to an embodiment of the present disclosure is shown. For example, transmitter structure 800 may be... Figure 1This is implemented in gNB 103. This example is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0110] like Figure 8 As shown, information data bit 810 is encoded by encoder 820 (e.g., turbo encoder) and modulated by modulator 830. Discrete Fourier Transform (DFT) unit 840 applies DFT to the modulated data bits, transmission BW selection unit 855 selects RE 850 corresponding to the allocated PUSCH transmission BW, unit 860 applies IFFT, and after cyclic prefix insertion (not shown), filter 870 applies filtering and transmits signal 880.

[0111] Figure 9 An example of a receiver structure 900 for a PUSCH in a subframe is shown according to an embodiment of the present disclosure; for example, the receiver structure 900 may be composed of... Figure 3 The UE 116 implementation is described above. This example is for illustrative purposes only, and other embodiments may be used without departing from the scope of this disclosure.

[0112] like Figure 9 As shown, the received signal 910 is filtered by filter 920. Subsequently, after removing the cyclic prefix (not shown), unit 930 applies FFT, receive BW selector 945 selects RE 940 corresponding to the assigned PUSCH receive BW, unit 950 applies inverse DFT (IDFT), demodulator 960 coherently demodulates data symbols by applying channel estimation obtained from DMRS (not shown), and decoder 970 (e.g., turbo decoder) decodes the demodulated data to provide an estimate of information data bits 980.

[0113] The 3GPP 5G NR specification defines two types of frequency ranges (FRs). The range below 6 GHz is referred to as frequency range 1 (FR1), and the millimeter wave range is referred to as frequency range 2 (FR2). This article shows examples of frequency ranges FR1 and FR2.

[0114] Table 0

[0115]

[0116] For MIMO in FR1, up to 32 CSI-RS antenna ports are supported, and in FR2, up to 8 CSI-RS antenna ports are supported. In next-generation cellular standards (e.g., 6G), new carrier bands can be evaluated in addition to FR1 and FR2, such as FR4 (>52.6 GHz), terahertz (>100 GHz), and mid-to-high frequency bands (10-15 GHz). The number of CSI-RS ports that can be supported for these new bands may differ from that of FR1 and FR2. Specifically, for the 10-15 GHz band, the maximum number of CSI-RS antenna ports may be greater than in FR1 due to the smaller antenna form factor and the feasibility of fully digital beamforming at these frequencies (as in FR1). For example, the number of CSI-RS antenna ports could increase to 128. Furthermore, the NW deployment / topology at these frequencies (e.g., network 130) is also expected to be denser / distributed. For example, antenna ports at multiple (non-co-located, and therefore geographically separated) TRPs distributed within a cellular area could be the main scenario of interest. As a result, the number of CSI-RS antenna ports for MIMO could be even greater (e.g., up to 256).

[0117] (Spatial or digital) precoding / beamforming can be used across these numerous antenna ports to achieve MIMO gain. Depending on the carrier frequency and the feasibility of the radio RF / hardware (HW) related components, (spatial) precoding / beamforming can be entirely digital or a hybrid analog-digital approach. In fully digital beamforming, a one-to-one mapping can exist between antenna ports and antenna elements, or multiple antenna elements can be used in a "static / fixed" virtualization of a single antenna port. Each antenna port can be digitally controlled. Therefore, spatial multiplexing across antenna ports is provided.

[0118] In wireless communication systems, MIMO is generally considered a key feature for achieving high system throughput requirements. One of the key components of MIMO transmission schemes is accurate CSI acquisition at the eNB (or gNB) (or TRP). In particular, for multi-user MIMO (MU-MIMO), the availability of accurate CSI is essential to guaranteeing high MU performance. For time-division duplex (TDD) systems, CSI can be acquired using SRS transmissions that rely on channel reciprocity. On the other hand, for frequency-division duplex (FDD) systems, CSI can be acquired using CSI-RS transmissions from the eNB (or gNB) as well as CSI acquisition and feedback from the UE. In common FDD systems, the CSI feedback framework is "implicit," taking the form of a Channel Quality Indicator (CQI) / Precoding Matrix Indicator (PMI) / Rank Indicator (RI) (also including the CSI Reference Signal Identifier (CRI) and Layer Identifier (LI)), which are derived from a codebook implying SU transmissions from the eNB (or gNB).

[0119] In 5G or NR systems [References 7, 8], the aforementioned “implicit” CSI reporting paradigm from LTE is also supported and referred to as Type I CSI reporting. Additionally, in the Release 15 specification, a high-resolution CSI report, referred to as Type II CSI reporting, is supported to provide more accurate CSI information to the gNB for use cases such as high-order MU-MIMO. However, embodiments of this disclosure recognize that the overhead of Type II CSI reporting can be a problem in actual UE implementations. One approach to reducing Type II CSI overhead is based on frequency domain (FD) compression. In Rel.3, 16NR, DFT-based FD compression (referred to as Rel.16 Enhanced Type II Codebook in REF8) for Type II CSI is already supported (References and Standards [8]). Some key components of this feature include (a) spatial domain (SD) base... (b) FD base (c) The coefficients of the linear combination of SD and FD bases In non-reciprocal FDD systems, the UE needs to report the complete CSI (including all components). However, when reciprocity or partial reciprocity does exist between the UL and DL, some CSI components can be obtained based on the UL channel estimated using SRS transmissions from the UE. In Rel.3, and in 16 NR, DFT-based FD compression is extended to this partial reciprocity case (referred to as Rel.16 Enhanced II Port Selection Codebook in Reference 8), where... The DFT-based SD base is replaced with SD CSI-RS port selection, i.e., from Select from CSI-RS ports (This choice is common to both antenna polarizations or both halves of the CSI-RS port). In this case, the CSI-RS port is beamformed in SD (assuming UL-DL channel reciprocity in the angular domain) and beamforming information can be obtained at gNB based on the UL channel estimated using SRS measurements.

[0120] In Rel.3. In NR, CSI reporting has been enhanced to support the following:

[0121] Further Enhanced Type II Port Selection Codebook: As is known in the literature, if the UL-DL duplex distance is small, UL-DL channel reciprocity can exist in both the angle domain and the delay domain. Since the delay-transformed basis vectors in the time domain (or closely related to the basis vectors in the frequency domain (FD)) can be further extended to the angle domain and the delay domain (or SD and FD), Rel.16 enhanced Type II port selection can be further extended to the angle domain and the delay domain. Specifically, DFT-based SD basis and In the DFT-based FD base, SD and FD port selection can be used instead; that is, selection is made in SD. Select one CSI-RS port or / and in FD Each port. In this case, the CSI-RS port is beamformed in SD (assuming UL-DL channel reciprocity in the angular domain) and / or FD (assuming UL-DL channel reciprocity in the delay / frequency domain), and the corresponding SD or / and FD beamforming information can be obtained at gNB based on the UL channel estimated using SRS measurements. In Rel.17, such a codebook is supported (which is referred to in Reference 8 as the Rel.17 Further Enhanced Type II Port Selection Codebook).

[0122] Non-Coherent Joint Transport (NCJT) CSI Report: When a UE can communicate with multiple TRPs distributed in different locations in space (e.g., within a cell), the CSI report can correspond to a single TRP assumption (i.e., a CSI report for one of the multiple TRPs) or a multi-TRP assumption (i.e., a CSI report for at least two of the multiple TRPs). Single-TRP and multi-TRP assumption CSI reporting are supported in Rel.17. However, multi-TRP CSI reporting assumes Non-Coherent Joint Transport (NCJT), meaning that the transport layer (and precoder) is limited to being sent from only one TRP.

[0123] In Rel.18, NR MIMO further provides the following CSI enhancements for two use cases (coherent joint transmission from multiple TRPs and high / medium speed UEs):

[0124] Assuming ideal backhaul and synchronization, and the same number of antenna ports across TRPs, the enhancements in CSI obtained for FR1 and coherent JTs across up to 4 TRPs are as follows:

[0125] Rel-16 / 17 is a Type II codebook refinement of CJT mTRP for FDD and its associated CSI reports, taking into account the throughput-overhead tradeoff.

[0126] By utilizing time-domain correlation / Doppler domain information to assist DL precoding for FR1, the CSI report for high / medium UE speeds is enhanced as follows:

[0127] The Rel-16 / 17 II codebook is refined without requiring modifications to the spatial and frequency domain foundations.

[0128] The UE reports time-domain channel attributes measured via CSI-RS used for tracking.

[0129] While the Rel-18 CJT CSI can support up to 128 antenna ports by configuring four CSI-RS resources (each with 32 antenna ports), there is another interest in supporting up to 128 antenna ports using Type I CSI, which requires less feedback overhead than the Rel-18 CJT CSI. Currently, a single CSI-RS resource can support up to 32 antenna ports for Type I single-panel (SP) and multi-panel (MP) CSIs. By using multiple CSI-RS resources for Type I CSI, up to 64 antenna ports can be configured according to one of the following two schemes:

[0130] Two CSI-RS resources, each with 32 antenna ports, for Rel-17 NCJT (which is based on Type I CSI);

[0131] Eight CSI-RS resources, each with eight antenna ports, for either Type I SP CSI or Type I MP CSI.

[0132] However, neither of these schemes provides CSI feedback associated with the entire channel across 64 antenna ports. Instead, they are designed for specific use cases: 1) NCJTs from two TRPs, and 2) a single CSI-RS resource selection and reporting associated with a selected CSI-RS resource. Therefore, embodiments of this disclosure recognize that Type I CSI with more than 32 antenna ports is limited in terms of use cases and requires some enhancements.

[0133] In next-generation MIMO systems, the number of antenna ports is expected to increase further (e.g., up to 256), for example, for carrier frequencies in the mid-to-high frequency band (10-15 GHz); NW deployments may be denser / more dispersed (when compared to 5G NR); the system is expected to work seamlessly even in challenging scenarios such as medium-to-high speed (e.g., 120 km / h) UEs and “high-order” multi-user MIMO.

[0134] Similar to the common (Rel.15 / 18NR), depending on the use case and scenario, both low-resolution (also known as Type I) and high-resolution (also known as Type II) CSI reporting for distributed systems, as discussed in this paper, are necessary and beneficial. However, unlike the usual approach, it is preferable to have a common framework or components between the two CSI reporting settings to provide a simple, future-proof, and scalable solution that is more feasible in practical deployments.

[0135] In Rel-19, there are several use cases when multiple CSI-RS resources are configured for CSI reporting. For example, multiple CSI-RS resources (up to four) can be used to configure a total of more than 32 ports (excluding ports less than or equal to 32) so that the UE can report aggregated or combined CSIs associated with more than 32 ports (e.g., Rel-18 CJT codebooks, or potential Rel-19 Type-I / II CSIs for >32 ports). In another example, multiple CSI-RS resources (up to eight) can be used to configure the UE to select one (or more) CSI-RS resources, where each resource corresponds to a (different) assumption under that resource configuration. For example, the NW can use a different analog beam for each CSI-RS resource. In view of those use cases when multiple CSI-RS resources are configured for CSI reporting, embodiments of this disclosure provide a method to support hybrid beamforming that includes CRI-based (or multiple) reporting, with each resource having up to eight CSI-RS ports (e.g., 32).

[0136] Various embodiments of this disclosure recognize that calibration is often a critical issue in distributed MIMO. Massive MIMO base stations use onboard coupling networks and calibration circuitry (referred to as onboard calibration) to measure the gain and phase difference between transceivers in the same radio frequency (RF) unit to maintain reciprocity between DL and UL channels in a TDD system. For onboard calibration, one RF chain corresponding to one antenna port serves as a reference for other RF chains used for other antenna ports. In the case of distributed MIMO, the signal of this reference transceiver needs to be shared between physically distant distributed RRHs / panels / modules. Using RF cables to distribute the reference is not preferred as it limits deployment scenarios. In distributed MIMO, using different local oscillators (LOs) among distributed antenna modules adds further challenges to achieving calibration because the phase of the LOs can drift. Periodic or non-periodic calibration is also required to compensate for phase drift.

[0137] This disclosure relates to a CSI reporting framework. In particular, it relates to the reporting of calibration coefficients or phase offsets for coherent joint transmissions from multiple TRPs. Aspects include:

[0138] WB / SB phase offset report for calibration

[0139] Subband / band granularity of phase offset report used for calibration

[0140] Number of subbands / bands reported for phase offset during calibration

[0141] Aspects, features, and advantages of this disclosure will become apparent from the following detailed description simply by illustrating several specific embodiments and implementations, including the best mode contemplated for carrying out this disclosure. Embodiments of this disclosure are also capable of having other and different embodiments, and several details thereof may be modified in various obvious ways without departing from the spirit and scope of this disclosure. Therefore, the drawings and description are to be considered illustrative in nature and not restrictive. Embodiments of this disclosure are shown in the accompanying figures by way of example and not limitation.

[0142] In the following text, for the sake of brevity, both FDD and TDD are considered to be duplex methods for DL ​​and UL signaling.

[0143] Although the following exemplary descriptions and embodiments assume orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA), this disclosure can be extended to other OFDM-based transmission waveforms or multiple access schemes, such as filtered OFDM (F-OFDM).

[0144] This disclosure covers several components that can be used in combination or together, or that can operate as a standalone solution.

[0145] Each of the following components and embodiments is suitable for UL transmissions with CP-OFDM (Cyclic Prefix OFDM) waveforms as well as DFT-SOFDM (DFT Extended OFDM) and SC-FDMA (Single Carrier FDMA) waveforms. Furthermore, each of the following components and embodiments is suitable for UL transmissions when the time scheduling unit is a subframe (which may include one or more time slots) or a time slot.

[0146] In this disclosure, the frequency resolution (reporting granularity) and span (reporting bandwidth) of a CSI report can be defined according to frequency “subbands” and “CSI reporting bands” (CRBs), respectively.

[0147] A subband used for CSI reporting is defined as a set of consecutive PRBs representing the smallest frequency unit used for CSI reporting. For a given value of the DL system bandwidth, the number of PRBs in a subband can be fixed, semi-statically configured via higher-layer / RRC signaling, or dynamically configured via L1 DL control signaling or MAC control elements (MAC CE). The number of PRBs in a subband can be included in the CSI reporting settings.

[0148] A “CSI reporting band” is defined as a set / collection of continuous or discontinuous subbands in which CSI reporting is performed. For example, a CSI reporting band may include every subband within the DL system bandwidth. This can also be referred to as a “full band”. Alternatively, a CSI reporting band may include only a set of subbands within the DL system bandwidth. This can also be referred to as a “partial band”.

[0149] The term “CSI Report Band” is used only as an example to indicate a function. Other terms such as “CSI Report Subband Set” or “CSI Report Bandwidth” or Bandwidth Part (BWP) may also be used.

[0150] Regarding UE configuration, the UE can be configured with at least one CSI reporting band. This configuration can be semi-static (via higher-layer signaling or RRC) or dynamic (via MAC CE or L1 DL control signaling). When multiple (N) CSI reporting bands are configured (e.g., via RRC signaling), the UE can report CSIs associated with n ≤ N CSI reporting bands. For example, >6 GHz, large system bandwidths may require multiple CSI reporting bands. The value of n can be configured semi-static (via higher-layer signaling or RRC) or dynamic (via MAC CE or L1 DL control signaling). Alternatively, the UE can report a recommended value of n via the UL channel.

[0151] Therefore, the frequency granularity of CSI parameters can be defined per CSI reporting band as follows. When a CSI parameter is used in M ​​within the CSI reporting band... nFor each of the subbands, the CSI parameters are configured to have M n A "single" report within a sub-band of the CSI reporting frequency band. When M is within the CSI reporting frequency band... n When each subband reports a CSI parameter, the CSI parameter is configured to have M n The "subband" of the CSI report frequency band.

[0152] Figure 10 A diagram illustrating an antenna port layout 1000 according to an embodiment of the present disclosure is shown. For example, the antenna port layout 1000 can be derived from... Figure 2 The BS 102 implementation. This example is for illustrative purposes only and may be used without departing from the scope of this disclosure.

[0153] refer to Figure 10 N1 and N2 are the number of antenna ports with the same polarization in the first and second dimensions, respectively. For a 2D antenna port layout, N1>1, N2>1, and for a 1D antenna port layout, N1>1 and N2=1 (or N1=1 and N2>1). For a single-polarization (or common-polarization) antenna port layout, the total number of antenna ports is... Furthermore, for a dual-polarized antenna port layout, the total number of antenna ports is... “X” indicates two antenna polarizations. In this disclosure, the term “polarization” refers to a set of antenna ports having the same polarization. For example, antenna ports Including the first antenna polarization, and the antenna port. Including the second antenna polarization, among which It refers to the number of CSI-RS antenna ports, and It is the starting antenna port number (e.g., If the antenna ports are 3000, 3001, 3002, ..., then the antenna ports are 3000, 3001, 3002, ... . This disclosure implies a dual-polarized antenna layout. However, the embodiments (and examples) in this disclosure are general and also applicable to single-polarized antenna layouts.

[0154] make This refers to the number of antenna groups or port groups (AG / PG). (See reference) Figure 10 When there are multiple antenna groups ( When ), each group ( Includes having in two dimensions One and Each antenna has a dual-polarized antenna port. Note that the antenna port layout can be the same in different antenna groups. and ( ), or they can differ across antenna groups. For groups The number of antenna ports is or (Used for common polarization or dual polarization respectively).

[0155] In one example, the antenna group corresponds to an antenna panel. In one example, the antenna group corresponds to a TRP. In one example, the antenna group corresponds to a Remote Radio Head (RRH). In one example, the antenna group corresponds to a CSI-RS antenna port of an NZP CSI-RS resource. In one example, the antenna group corresponds to a subset of CSI-RS antenna ports of an NZP CSI-RS resource (including multiple antenna groups). In one example, the antenna group corresponds to CSI-RS antenna ports of multiple NZP CSI-RS resources (e.g., including a set of CSI-RS resources).

[0156] In one example, the antenna group corresponds to a reconfigurable smart surface (RIS), where the antenna group can be (re)configured more dynamically (e.g., via MAC CE and / or DCI). For example, the number of antenna ports associated with the antenna group can be dynamically changed.

[0157] Figure 11 An example co-located and distributed antenna array AG / PG 1100 for providing services to a mobile UE according to an embodiment of this disclosure is shown. For example, by... Figure 1 The example is a co-located and distributed AG / PG1100 of any of the implementations of BS 101-103. This example is for illustrative purposes only and may be used without departing from the scope of this disclosure.

[0158] In one example scenario, multiple AG / PGs can be co-located or distributed, and can provide services to static (non-mobile) or mobile UEs. (Reference) Figure 11 The diagram illustrates an AG / PG serving a mobile UE. When the UE moves from location A to another location B, the UE measures the channel, for example via NZP CSI-RS resources (and may also measure interference, for example via CSI Interference Measurement (CSI-IM) resources or CSI-RS resources used for interference measurement), and uses this measurement to determine / report the CSI considering joint transmissions from multiple AG / PGs. The reported CSI may be based on a codebook. The codebook may include components considering multiple AG / PGs and channel distributions in the frequency / delay domain and time / Doppler domain.

[0159] In one example, the antenna architecture of the MIMO system is structured. For instance, the antenna structure at each AG / PG is dual-polarized (e.g., Figure 10(Single-panel or multi-panel configuration shown). The antenna structure at each AG / PG can be the same. Or the antenna structure at one AG / PG can be different from that of another AG / PG. Similarly, the number of ports at each AG / PG can be the same. Or the number of ports at one AG / PG can be different from that of another AG / PG.

[0160] In another example, the antenna architecture of a MIMO system is unstructured. For instance, the antenna structure at one AG / PG can differ from that at another AG / PG.

[0161] The structured antenna architecture is described in the remainder of this disclosure. For simplicity, each AG / PG is expected to correspond to one panel (see [link to disclosure]). Figure 10 Although in practice, the AG / PG can have multiple panels. However, this disclosure is not limited to the expectation of a single panel at each AG, and extends (covers) the case when the AG / PG has multiple antenna panels.

[0162] In various embodiments, AG / PG constitutes (or corresponds to or is equivalent to) at least one of the following:

[0163] In one example, AG / PG corresponds to TRP.

[0164] In one example, AG / PG corresponds to CSI-RS resources. The UE is configured with There are multiple non-zero power (NZP) CSI-RS resources, and CSI reporting is configured to span multiple CSI-RS resources. This is similar to the Class B, K>1 configuration in Rel.14 LTE. An NZP CSI-RS resource can belong to a CSI-RS resource set or multiple CSI-RS resource sets (e.g., Each resource set comprises one CSI-RS resource. Details are as explained in this disclosure.

[0165] In one example, AG / PG corresponds to a CSI-RS resource group, where the group includes one or more NZP CSI-RS resources. The UE is configured with A non-zero power (NZP) CSI-RS resource, and CSI reporting is configured to span multiple CSI-RS resources from the resource group. This is similar to the Class B, K>1 configuration in Rel.14 LTE. An NZP CSI-RS resource can belong to a CSI-RS resource set or multiple CSI-RS resource sets (e.g., Each resource set comprises one CSI-RS resource. Details are as explained in this disclosure. In particular, Each CSI-RS resource can be divided into Resource groups. Information about resource groups may be provided with CSI-RS resource settings / configuration, or with CSI reporting settings / configuration, or with CSI-RS resource configuration.

[0166] In one example, AG / PG corresponds to a subset (or group) of CSI-RS ports. The UE is configured with at least one NZPCSI-RS resource, which includes (or is associated with) CSI-RS ports. These CSI-RS ports can be grouped (or divided) into multiple subsets / groups / parts of antenna ports, each subset / group / part corresponding to (or constituting) AG / PG. Information about port subsets or port groupings can be provided with CSI-RS resource settings / configurations, or with CSI reporting settings / configurations, or with CSI-RS resource configuration.

[0167] In one example, depending on the configuration, AG / PG corresponds to one or more examples described herein. For instance, the configuration may be explicit via parameters (e.g., RRC parameters), or it may be implicit.

[0168] In one example, when implicit, it can be based on The value of . For example, when When there are multiple CSI-RS resources, AG / PG corresponds to one or more examples described herein. For example, when When there are multiple CSI-RS resources, AG / PG corresponds to one or more examples described in this document.

[0169] In another example, the configuration can be based on the configured codebook. For example, when the codebook corresponds to a decoupled codebook (a modular or separate codebook for each AG / PG), the AG / PG corresponds to a CSI-RS resource or resource group according to one or more examples described herein, and when the codebook corresponds to a coupled (joint or coherent) codebook (a joint codebook across AG / PG), the AG / PG corresponds to a subset (or group) of CSI-RS ports.

[0170] In one example, when an AG / PG is mapped to (or corresponds to) a CSI-RS resource or resource group, and the UE can select a subset of AG / PGs (resources or resource groups) and report CSI for the selected AG / PG (resource or resource group), the selected AG / PG can be reported via an indicator. For example, the indicator could be CRI or PMI (component) or a new indicator.

[0171] In one example, when an AG / PG is mapped to (or corresponds to) a CSI-RS port group (Example A.4), and the UE can select a subset of AG / PGs (port groups) and report CSI for the selected AG / PGs (port groups), the selected AG / PG can be reported via an indicator. For example, the indicator can be CRI or PMI (component) or a new indicator.

[0172] In one example, when is Multiple AG / PG configurations ( When using CSI-RS resources, a decoupled (modular) codebook is used / configured, and when it is... Each AG / PG configuration is a single ( When using CSI-RS resources, the union codebook is used / configured.

[0173] Figure 12 An example of a timeline 1200 for a UE to receive NZP CSI-RS resource (or multiple) bursts is shown according to an embodiment of this disclosure. For example, the timeline 1200 for a UE to receive NZP CSI-RS resource (or multiple) bursts can be provided by… Figure 3 The UE 116 receives this. This example is for illustrative purposes only, and other embodiments may be used without departing from the scope of this disclosure.

[0174] In one embodiment, reference Figure 12 The UE is configured to include the measurement window. A burst of receiving non-zero power (NZP) CSI-RS resources (or more) within a time slot is referred to as a CSI-RS burst. . Each time slot can correspond to at least one of the following examples.

[0175] In one example Each time slot is spaced between time slots. Evenly / consistently spaced.

[0176] In one example Each time slot can be spaced between time slots. They are non-uniformly spaced, wherein for at least one pair , , .

[0177] The UE (e.g., UE 116) receives a CSI-RS burst and estimates the DL channel measurements. Each instance is used, and channel estimation is employed to obtain the Doppler components (or multiple components) of the DL channel. CSI-RS bursts can be linked to (or associated with) a single CSI report setting (e.g., via a higher-level parameter CSI-ReportConfig), where the corresponding CSI report includes information about the Doppler components of the DL channel.

[0178] make Based on time slots DL channel estimation of CSI-RS resources (or more) received in the time slot. The DL channel estimation in the middle is of size . matrix At that time, Then among them , and These represent the number of receive (Rx) antennas at the UE, the number of CSI-RS ports measured by the UE, and the number of subcarriers in the CSI-RS burst band, respectively. (Symbols) Used to represent vectorized operations, where by, for example, 1 2 3 The elements of the matrix are concatenated in order to form the matrix. Transforming into vectors means that the concatenation starts from the first dimension, then moves to the second dimension, and continues until the last dimension. Let... It is a cascaded DL channel. The Doppler components of the DL channel can be based on... To obtain. For example, It can be represented as ,in It is a Doppler field (DD) basis matrix, whose columns include basis vectors. It is a coefficient matrix, whose columns include coefficient vectors, and It is the number of basis vectors in DD. Because... The columns may be related, therefore when The value is smaller than (and) When the value is compared to ( ), DD compression can be achieved. In this example, the Doppler components (or multiple components) of the channel are composed of the DD basis matrix. sum coefficient matrix express.

[0179] When there are multiple TRP / RRH ( When ), the UE can be configured to measure CSI-RS bursts according to at least one of the following examples.

[0180] In one example, the UE is configured for measurement. One CSI-RS burst, one per TRP / RRH. CSI-RS bursts can overlap in time (i.e., measured in the same time slot), or they can interleave in time (i.e., measured in different time slots). Whether bursts overlap or interleave can be determined based on the configuration. This can also depend on the total number of CSI-RS ports across the RRH / TRP. When the total number of ports is small (e.g., <= 32), they can overlap; otherwise (> 32), they are interleaved. Each of the sudden events, a time instance. The quantity can be the same. Or the quantity... It can be the same or different across bursts (or TRP / RRH).

[0181] In one example, each CSI-RS burst corresponds to a semi-persistent (SP) CSI-RS resource. SP CSI-RS resources can be activated or deactivated based on MAC CE and / or DCI-based signaling. Additional details are as set forth in U.S. Patent Application No. 17 / 689,838 ('838 application), filed March 8, 2022, the entire contents of which are incorporated herein by reference.

[0182] In one example, each CSI-RS burst corresponds to a set A non-periodic (Ap) CSI-RS resource. Ap-CSI-RS resources can be triggered via DCI with time slot offset, enabling... They are measured in different time slots. Further details can be found in the '838 application.

[0183] In one example, each CSI-RS burst corresponds to a periodic (P)CSI-RS resource. P-CSI-RS resources can be configured via higher layers. The first measurement instance (time slot) and measurement window of a CSI-RS burst (from a P-CSI-RS resource) can be fixed or configured. Further details can be found in the '838 application.

[0184] In one example, a CSI-RS burst can be a P-CSI-RS, SP-CSI-RS, or Ap-CSI-RS resource.

[0185] In one example The temporal behavior (P, SP, or Ap) of each CSI-RS burst is the same.

[0186] In one example The temporal behavior of individual CSI-RS bursts can be the same or different.

[0187] In one example, the UE (such as UE 116) is configured to measure One CSI-RS burst, of which and It is related to RRH / TRP The number of associated CSI-RS bursts, of which Each CSI-RS burst is based on one or more examples described in this document. At that time, multiple CSI-RS bursts are linked to (or associated with) the CSI reporting settings, that is, the UE receives... A CSI-RS burst, estimate the DL channel, and use Each acquired channel's Doppler component in a CSI-RS burst. Further details can be found as described in application '838.

[0188] In one example, the UE is configured to measure across One CSI-RS burst for each of the TRP / RRHs. Let This refers to the number of CSI-RS ports associated with NZP CSI-RS resources measured via CSI-RS bursts. A CSI-RS burst is one or more examples as described herein. Total A port can be divided into ports. Each group / subset, and a group / subset of ports is associated (or corresponds to) TRP / RRH. Then, and It is related to RRH / TRP The number of CSI-RS ports in the associated port group / subset.

[0189] In one example, In each of the time instances, the UE is configured to measure each port group / subset, that is, in each time instance within a burst, the UE measures... Each of the ports (or ports) (Groups / subsets).

[0190] In one example, the UE is configured to measure a subset / group of ports across multiple time instances; that is, the UE measures in each time instance within a burst. A subset of individual ports or a subset of port groups (RRH / TRP).

[0191] In one example, within each time instance, the UE measures only a group / subset of ports (1 TRP per time instance). In this case, or Among them This is the number of measurement instances per TRP / RRH.

[0192] In one example, the UE is configured to measure half of the port group in one time instance and the remaining half in another time instance.

[0193] In one example, the two time instances can be consecutive; for example, the UE measures half of the port group in an even-numbered time instance and the remaining half in an odd-numbered time instance.

[0194] In one example, the first half of the time instance (e.g., ) is configured as half of the measurement port group, and the latter half of the time instance (e.g. ), which is configured as the remaining half of the measurement port group.

[0195] In one example, the UE is configured to measure multiple CSI-RS bursts, where each burst is one or more examples as described herein. The multiple CSI-RS bursts are linked to (or associated with) CSI reporting settings, i.e., the UE receives multiple CSI-RS bursts, estimates the DL channel, and uses each of the multiple CSI-RS bursts to obtain the Doppler components (or multiple components) of the channel.

[0196] make There are DD basis vectors The length, for example, is the length of each basis vector. Column vectors.

[0197] Figure 13 An example of a timeline 1300 for partitioning CSI-RS burst instances according to various embodiments of the present disclosure is shown. For example, the timeline 1300 for partitioning CSI-RS burst instances can be provided by... Figure 1 The UE 113 receives this. This example is for illustrative purposes only, and other embodiments may be used without departing from the scope of this disclosure.

[0198] In one embodiment, the UE is configured based on values ​​in the CSI-RS burst. The number of CSI-RS instances and the components for which DD compression is performed determine this. The value of , where each component corresponds to one or more time instances within a CSI-RS burst. In one example, It is fixed (e.g.) This information may be configured (e.g., via RRC, MAC CE, or DCI) or reported by the UE (e.g., UE 116) as part of a CSI report. In one example, A CSI-RS instance can be divided into time-series (ST) units (instances), where each ST unit is defined as (up to) a CSI-RS burst. A continuous-time instance. In this example, the component used for DD compression corresponds to the ST cell. Reference Figure 13 This illustrates three examples of ST units. In the first example, each ST unit includes [missing information] in a CSI-RS burst. A time instance. In the second example, each ST unit includes in the CSI-RS burst. A continuous-time instance. In the third example, each ST unit includes one instance in the CSI-RS burst. Continuous-time instance.

[0199] The value can be fixed (e.g., (or 2 or 4) or indicated to the UE (e.g., via higher-level RRC or MAC CE or DCI-based signaling) or reported by the UE (e.g., as part of a CSI report). The value (fixed, indicated, or reported) can be experienced in the UE capability report. The value can also depend on Value (e.g., a value used for) The range of values, and another value used for (Another range of values).

[0200] When there are multiple TRP / RRH ( When ), the UE can be configured to determine based on at least one of the following examples. The value of .

[0201] In one example The value is the same for each TRP / RRH.

[0202] In one example The value can be the same or different across TRP / RRH.

[0203] Figure 14 This is an example of RB and SB partitions 1400 according to embodiments of the present disclosure. For example, RB and SB partitions 1400 can be constructed by... Figure 3 UE 116 is followed. This example is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0204] In one embodiment, the UE is configured with an occupied frequency band and a time span (duration). Several CSI-RS bursts (as shown in this article), with frequency bands including One RB, and the time span includes (one or more CSI-RS resources). A time instance. When hour, RB or / and A time instance can span Several CSI-RS bursts are aggregated. In one example, the frequency band equals the CSI reporting frequency band, and the time span equals the number of CSI-RS resource instances (span). Both can be configured for UE (e.g., UE 116) for CSI reporting, which can be based on DD compression.

[0205] The UE is also configured to... Each RB partition (divided) into subbands (SB) or / and Each time instance is partitioned (divided) into sub-times (ST). A partition of RB can be based on the SB size value. This can be configured for the UE (see Table 5.2.1.4-2 of Reference 8). As described in this disclosure, Partitioning of a time instance can be based on the ST size value. or Value. Reference Figure 14 , RB0, RB1,…, RB A-1 include RB, include One time instance, SB size and ST size .

[0206] When there are multiple TRP / RRH ( When ), the UE can be configured to determine the subband (SB) and / or subtime (ST) based on at least one of the following examples.

[0207] In one example, the subband (SB) and / or subtime (STs) are the same for each TRP / RRH in the TRP / RRH.

[0208] In one example, the subband (SB) is the same for each TRP / RRH, but the subtime (ST) can be the same or different across RRH / TRP.

[0209] In one example, the sub-time (ST) is the same for each TRP / RRH, but the sub-band (SB) can be the same or different across RRH / TRP.

[0210] In one example, the sub-time (ST) and sub-band (SB) can be the same or different across RRH / TRP.

[0211] For illustration, the following description uses examples where SB or / and ST are the same for each TRP / RRH.

[0212] CSI reports are based on channel measurements in three dimensions (3D) (based on CSI-RS bursts): the first dimension corresponds to including CSI-RS antenna ports (total spanning) The SD of each of the RRH / TRPs, the second dimension corresponding to including The FD of FD units (e.g., SB), and the third dimension corresponds to including The DD of DD units (e.g., ST). 3D channel measurements can be compressed using basis vectors (or matrices) similar to the Rel.16 Enhanced Type II codebook. Let , and These represent the basis matrices, whose columns include the basis vectors of SD, FD, and DD.

[0213] In one embodiment, DD compression (or DD componentization) can be turned off / on based on the codebook. (Base). When closed, It can be fixed (and therefore not reported), for example, (Scalar 1) or (All-one vector) or (All-one vector) or (Identity matrix), where It is a scaling factor (e.g.) )or ,in It is a fixed DD basis vector The index. In one example, In one example, when the DD basis vectors include orthogonal DFT basis sets, This is the DD basis vector corresponding to the DC component. When enabled, it reports... (DD basis vectors).

[0214] In one example It can be turned off / on via explicit signaling (e.g., explicit RRC parameters).

[0215] In one example Turn it on / off via codebook parameters. For example, similar to Rel.17. ,when When configured, It was closed, and the person on duty... When configured, It has been activated. Here, Indicates including The number of DD basis vectors in the column.

[0216] In one example, the UE reports whether the DD component is off (not reported) or on (reported). This reporting can be via a dedicated parameter (e.g., a new UCI / CSI parameter). Alternatively, the reporting can be via an existing parameter (e.g., the PMI component). Both parts of the UCI can be reused (see Rel. 15 NR), where whether... Information on whether something is turned on or off is included in UCI Part 1.

[0217] In one example It is turned on / off depending on the codebook type. When codebookType is a regular Type II codebook (similar to a Rel 16 Type II codebook), When enabled, and when codebookType is a Type II port selection codebook (similar to a Rel 17 Type II codebook), On / Off.

[0218] Figure 15 Examples of SD units, FD units, and TD units 1500 according to embodiments of the present disclosure are shown. For example, the example SD unit, FD unit, and TD unit 1500 may be derived from... Figure 1 Any of UEs 111-116 may be used. This example is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0219] In one embodiment, the UE (e.g., UE 116) is configured (e.g., via higher-level CSI configuration information) to have CSI reporting, where the CSI reporting is based on channel measurements (and interference measurements) and codebook. When CSI reporting is configured to be aperiodic, it is reported when triggered via a DCI field (e.g., a CSI request field) in the DCI.

[0220] Channel measurements can be based on data transmitted from multiple spatial domain (SD) elements (e.g., SD element = CSI-RS antenna port) and measured via multiple frequency domain (FD) elements (e.g., FD element = one or more PRB / SB) and via time domain (TD) elements or multiple TD elements (e.g., TD element = one or more time slots). A Channel Measurement Resource (CMR). In one example, the CMR could be an NZP-CSI-RS resource.

[0221] CSI reports can be associated with multiple FD units and multiple TD units associated with channel measurements. Alternatively, CSI reports can be associated with a second set of FD units (different from the multiple FD units associated with channel measurements) and / or a second set of TD units (different from the multiple TD units associated with channel measurements). In the latter case, the UE (e.g., UE 116) can perform predictions (interpolation or extrapolation) based on channel measurements within a second set of FD units and / or a second set of TD units associated with the CSI report.

[0222] refer to Figure 15 The diagram shows the SD element (in the first and second antenna dimensions), FD element, and TD element:

[0223] The first dimension is associated with and includes the first antenna port dimension. Units,

[0224] The second dimension is related to and includes the second antenna port dimension. Units,

[0225] The third dimension is related to and includes the frequency dimension. Each unit, and

[0226] The fourth dimension is associated with and includes the time / Doppler dimension. Units.

[0227] Regarding SD units, multiple SD units can be associated with one or more antenna groups (i.e., The antenna ports (e.g., located together at one site or distributed across multiple sites) are associated, and the spatial domain distribution of channel measurements is dimensioned.

[0228] when At that time, there existed including One CMR for each CSI-RS antenna port.

[0229] when At that time, there existed including For each port of an AG / PG, the CSI report is based on channel measurements from that AG / PG.

[0230] when At that time, there are multiple AG / PGs, and the CSI report is based on channel measurements from / across multiple AG / PGs.

[0231] when In this case, multiple Channel Mapping Regulators (CMRs) exist, and the CSI report is based on channel measurements across these multiple CMRs. In one example, a CMR corresponds to an Aggregate Regulator / Planetary Regulator (AG / PG) (one-to-one mapping). In another example, multiple CMRs may correspond to AG / PG (many-to-one mapping).

[0232] In one example, when When all antenna ports are located at one site In one example, when When an antenna port is distributed across multiple sites (non-co-located), .

[0233] In one example, when When multiple antenna ports are located at a single site and within a single antenna panel In one example, when When an antenna port is distributed across multiple antenna panels (which can be co-located or non-co-located). .

[0234] It can be configured, for example, via higher-level RRC parameters. The value. Or it can be indicated via MAC CE. Or it can be provided via the DCI field.

[0235] Similarly, it can be configured, for example, via higher-level RRC parameters. The value. Or it can be indicated via MAC CE. Or it can be provided via the DCI field.

[0236] In one example It can be configured, for example, via higher-level RRC parameters. The value. Or it can be indicated via MAC CE. Or it can be provided via the DCI field.

[0237] In one example The value is based on The value determines this. In one example, The value is based on The value determines it.

[0238] Regarding FD units, multiple FD units can be associated with the frequency domain allocation of resources (e.g., one or more CSI reporting bands, each CSI reporting band including multiple PRBs) and dimensionalize the frequency (or delay) domain distribution of channel measurements.

[0239] Regarding TD / DD units, multiple TD units can be associated with the time-domain allocation of resources (e.g., one or more CSI reporting windows, each including multiple time slots) and the time (or Doppler) domain distribution of channel measurements can be dimensioned.

[0240] In TDD, one approach to acquiring DL channel state information is by utilizing UL channel estimation through receiving UL RS (e.g., SRS) transmitted from the UE. By leveraging channel reciprocity in TDD systems, UL channel estimation itself can be used to infer the DL channel. This advantageous feature allows NW / gNB to significantly reduce training overhead. However, directly using the UL channel for the DL channel is inaccurate due to RF impairments at the transmitter and receiver, and a (periodic) calibration process is required between the receive and transmit antenna ports of the RF network at the NW. Typically, the NW has an onboard calibration mechanism in its own RF network to calibrate its antenna panels with multiple receiver / transmitter antenna ports to achieve DL / UL channel reciprocity in channel acquisition. The onboard calibration mechanism can be performed via low-power RS ​​transmission and reception from / to the NW's RF antenna network, thus it can be implemented in a constrained manner by the NW (i.e., without interfering with other entities). However, due to the wide distribution of panels / RRHs, performing on-board calibration in distributed MIMO systems becomes difficult, and therefore requires over-the-air (OTA) signaling mechanisms to calibrate the receive / transmit antenna ports between multiple remote RRHs / panels / TRPs in distributed MIMO. This disclosure provides a UE-assisted calibration mechanism for distributed MIMO systems to overcome this difficulty.

[0241] In one example, TRP or RRH can be functionally equivalent to (and therefore can be replaced with) one or more of the following: antenna or antenna group (multiple antennas), antenna port, antenna port group (multiple ports), CSI-RS resource, multiple CSI-RS resources, CSI-RS resource set, multiple CSI-RS resource set, antenna panel, multiple antenna panels, Tx-Rx entity, (analog) beam, (analog) beam group, cell, cell group.

[0242] In one example, the CSI-RS in this disclosure includes at least one or a combination of the following: a CSI-RS for tracking, a CSI-RS for CSI, a CSI-RS for BM, and a CSI-RS for mobility.

[0243] Various embodiments provide calibration mechanisms with calibration coefficient reporting. In one embodiment, the UE is configured with a calibration mechanism in which the UE is configured to perform one or more UL RS transmissions, perform one or more DL RS receptions / measurements, and / or report calibration-related information (e.g., for calibration between multiple TRPs). Multiple TRPs may be associated with one base station (gNB / cell) or more than one base station (gNB / cell). This configuration can be performed via higher-layer (RRC) signaling. In one example, DL RS reception and calibration-related information reporting can be dynamically triggered via L1 or L2 signaling (PDCCH or MAC-CE). In one example, DL RS reception and calibration-related information reporting can be triggered / indicated aperiodically via L1 or L2 signaling (PDCCH or MAC-CE). In one example, DL RS reception and calibration-related information reporting can be semi-persistently performed via activation / deactivation of L1 or L2 signaling (PDCCH or MAC-CE). In one example, the DL RS may be a DL DMRS or TRS or a dedicated DL RS (for calibration purposes). In one example, the UL RS can be an SRS, a UL DMRS, or a dedicated UL RS (for calibration purposes).

[0244] Figure 16 An example signal flow 1600 for a calibration mechanism according to an embodiment of the present disclosure is shown. For example, signal flow 1600 may be implemented between the UE and NW entities such as UE 116 and BS 102, respectively. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0245] like Figure 16As shown, the depicted steps include NW configuration of the UE with a calibration mechanism (1610), transmission of UL RS (1620), NW estimation of the UL channel and design of the DL precoder based on the estimated UL channel for DL ​​RS transmission from multiple TRPs (1630), UE reception of DL RS (1640), and UE reporting of calibration-related information after DL channel estimation (1660), and generation of calibration-related information based on the estimated DL channel (1650). These steps can be configured or activated jointly. In one example, at least one of the steps can be configured or activated individually. In one example, all steps can be configured or activated individually. For example, the UE can be configured or triggered (in the case of semi-persistent and aperiodic SRS) to transmit SRS individually (as is usually the case). However, reception of DL RS (such as aperiodic CSI-RS) can be configured and / or triggered jointly with the reporting of calibration-related information. In one example, this joint triggering can be performed using the CSI request DCI field via one or more dedicated trigger states (configured at a higher layer).

[0246] In one example, the term "precoder" in this disclosure may be replaced by spatial information (or TCI status, or spatialRelationInfo) or source RS or spatial filter, beamformer, beamforming vector / matrix, precoding vector / matrix or any other functional equivalent that may be used for UL RS transmission.

[0247] The configuration of DL RS (e.g., CSI-RS) can be unrestricted or have at least one of the following restrictions.

[0248] In one example, only one port of DL RS can be configured.

[0249] In one example, only TRS (CSI-RS for tracing) can be configured.

[0250] In one example, only periodic DL-RS can be configured.

[0251] In one example, a higher density (e.g., 3 REs per port) DL RS can be configured for CSI.

[0252] In one example, a time-slot DL RS measurement can be configured.

[0253] In one example, the measurement window (multiple time slots) for DL ​​RS measurements can be configured as: SP (semi-persistent) CSI-RS or CSI-RS with repetition or multiple non-periodic CSI-RS with different offsets (e.g., uniform separation).

[0254] In one example, the latest timeslot with DLRS from the timeslot used for UL RS transmission can be configured, predetermined, or fixed.

[0255] In one example, there exists a minimum time gap (delay). This includes, for example, the number of time slots or OFDM symbols between DL RS measurements and UL RS transmissions. This is to allow the UE to calculate the necessary information for UL RS transmissions. For example... In another example, .

[0256] The configuration of UL RS (e.g., SRS) can be unrestricted or have at least one of the following restrictions.

[0257] In one example, only one port UL RS can be configured.

[0258] In one example, only periodic UL-RS can be configured.

[0259] In one example, a higher density (e.g., 3 REs per port) UL RS can be configured for SRS.

[0260] In one example, a time-slot UL RS transmission can be configured.

[0261] In one example, the measurement window (multiple time slots) for UL RS transmission can be configured as: SP (semi-persistent) SRS or SRS with repeating patterns or multiple non-periodic SRS with different offsets (e.g., uniform separation).

[0262] In one example, the latest time slot with UL RS transmission can be configured, predetermined, or fixed, starting from the time slot used for DL ​​RS measurements.

[0263] In one example, there exists a minimum time gap (delay). For example, in the number of time slots or OFDM symbols between UL RS transmission and DL RS measurement. This is to allow the UE to calculate the necessary information for UL RS transmission. For example... In another example, .

[0264] Various embodiments provide units for associating RS resources. In one embodiment, One DL RS (e.g., CSI-RS) resource and used for calibration mechanisms A UL RS (e.g., SRS) resource is associated / linked, where and Here, the “association” or “link” between DL RS resources and UL RS resources refers to at least one of the following examples:

[0265] In one instance, the (UE's) pre-decoder for the transmission of the ULRS resource is determined based on measurements of a DLRS resource associated with the ULRS resource.

[0266] In one instance, the (UE's) pre-decoder for the transmission of ULRS resources is determined based on measurements of multiple DLRS resources associated with ULRS resources.

[0267] In one example, the precoder (of the gNB) for transmission of the DLRS resource is determined based on measurements of a UL RS resource associated with the DL RS resource.

[0268] In one example, the precoder (of the gNB) for transmission of the DLRS resource is determined based on measurements of multiple UL RS resources associated with the DL RS resource.

[0269] In the example, a DL RS resource is associated with a UL RS resource (e.g., for a calibration mechanism) in a one-to-one manner. For convenience, this association may be referred to as a "one-to-one RS association" in this disclosure, but should not be limited to that term.

[0270] Figure 17 An example of a one-to-one RS association 1700 according to an embodiment of this disclosure is shown. This example is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0271] In this example, (many-to-one association) Each DL RS resource is associated with one UL RS resource (e.g., for calibration mechanisms). In this disclosure, for convenience, this association is referred to as a "many-to-one RS association," but should not be limited to this terminology.

[0272] Figure 18 An example of a many-to-one RS association 1800 according to an embodiment of the present disclosure is shown. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0273] In this example, a DL RS resource is associated with (one-to-many relationships). Each UL RS resource is associated (e.g., for calibration mechanisms). In this disclosure, for convenience, such an association may be referred to as a "one-to-many RS association," but should not be limited to that term.

[0274] Figure 19An example of a one-to-many RS association 1900 according to an embodiment of this disclosure is shown. This example is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0275] In various embodiments, any combination of one or more associations can be configured via higher-level (e.g., RRC) parameters (e.g., for calibration mechanisms), where each association is a one-to-one, many-to-one, or one-to-many association as described in the embodiments herein. In one example, supported configurations may be subject to UE capabilities (i.e., the UE reporting information about the types of associations it can support or combinations of multiple associations). In one example, configurations can be... A one-to-one RS association (e.g., for calibration mechanisms). For example, A one-to-one RS association can be shown in the figure below.

[0276] Figure 20 An example of N one-to-one RS associations 2000 according to an embodiment of this disclosure is shown. This example is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0277] In this example, a many-to-one RS association can be configured (e.g., for a calibration mechanism). For example, a many-to-one RS association can be shown in the figure below.

[0278] Figure 21 An example of a many-to-one RS association 2100 according to an embodiment of the present disclosure is shown. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0279] In this example, configuration is possible. One-to-many RS associations (e.g., for calibration mechanisms). For example, A one-to-many RS association can be shown in the figure below.

[0280] Figure 22 An example of N one-to-many RS associations 2200 according to an embodiment of this disclosure is shown. This example is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0281] In this example, configuration is possible. Many-to-one RS associations (e.g., for calibration mechanisms). For example, A many-to-one RS association can be shown in the figure below.

[0282] Figure 23An example of N many-to-one RS associations 2300 according to an embodiment of this disclosure is shown. This example is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0283] In this example, configuration is possible. One-to-one RS association, One-to-many RS association and Many-to-one RS associations (e.g., for calibration mechanisms), where ,and .For example, The situation is shown in the figure below.

[0284] Figure 24 Examples of embodiments according to this disclosure are shown. One-to-one RS association, One-to-many RS association and An example of a many-to-one RS association 2400. This example is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0285] In this example, .

[0286] In one example, a combination of one or more one-to-one RS associations and one or more many-to-one RS associations can be configured (e.g., for calibration mechanisms).

[0287] In one example, a combination of one or more one-to-one RS associations and one or more one-to-many RS associations can be configured (e.g., for calibration mechanisms).

[0288] In one example, a combination of one or more many-to-one RS associations and one or more one-to-many RS associations can be configured (e.g., for calibration mechanisms).

[0289] In one example, one or more one-to-one RS associations, one or more many-to-one RS associations, and combinations of one or more one-to-many RS associations can be configured (e.g., for calibration mechanisms).

[0290] In one embodiment, the high-level parameter usage of the UL RS set (e.g., SRS resource set) used for the calibration mechanism configuration can be set to a new use case term, such as "tddCjt", "tddCalib", "cjtCalib", "calibration", "none", etc.

[0291] In another embodiment, the high-level parameter usage of the set of configurations for the UL RS used for the calibration mechanism (e.g., the SRS resource set) can be set to an existing use case.

[0292] In one example, the high-level parameter `usage` can be set to "nonCodebook". In another example, `usage` can be set to "codebook". In yet another example, `usage` can be set to "antennaSwitching". In yet another example, `usage` can be set to "beamManagement".

[0293] In one embodiment, the associations described in these embodiments may be provided by existing high-level parameters. In one example, the high-level parameter `spatialRelationInfo` of an SRS resource (or a set of SRS resources or multiple SRS resources) provides the association with the corresponding DL RS (e.g., CSI-RS).

[0294] In another example, the high-level parameter `associatedCSI-RS` for an SRS resource set (or SRS resource or multiple SRS resources) provides the association with the corresponding DL RS (e.g., CSI-RS). In another example, the high-level parameter `qclInfo` or `tciState` for a CSI-RS resource (or CSI-RS resource set or multiple CSI-RS resources) provides the association with the corresponding UL RS (e.g., SRS). In yet another example, the high-level parameter `associatedSRS` for a CSI-RS resource set (or CSI-RS resource or multiple CSI-RS resources) provides the association with the corresponding UL RS (e.g., SRS).

[0295] In one embodiment, the UE can be triggered / instructed / configured via DCI, MAC-CE, or RRC to perform UL RS transmission and / or DL ​​RS reception / measurement and / or calibration-related information reporting, wherein the DL RS and UL RS are associated / configured in the manner described in the embodiments herein. Alternatively, all or some (a subset) of the configured DL RS / UL RS associations can be triggered to perform UL RS transmission and / or DL ​​RS reception / measurement and / or calibration-related information reporting. This trigger can be a DCI field in the DCI (DL-DCI, UL-DCI, or dedicated DCI). In one example, the DCI field can be “Calibration Request,” “CSI Request,” or “Calibration Report Request.” In one example, the DCI field is an existing DCI field, and the code point of said field is used to trigger the association. Optionally, the trigger can be via MAC CE or MAC CE+DCI. Later, MAC CE can be used to activate / select a subset of associations configured by RRC, and DCI can trigger associations from the activated subset.

[0296] In one example, the UE can be triggered / instructed / configured to jointly perform UL RS transmission and DL RS reception, as well as calibration-related information reporting. That is, the UE performs UL RS transmission and (subsequently) measures the configured DL RS, where the precoder (e.g., matched filter precoder) for transmitting each DL RS is determined based on the measurement of the associated UL RS on the NW side.

[0297] In one example, the UE can be triggered / instructed / configured to (individually) perform UL RS transmission and DL RS reception and calibration-related information reporting, or perform DL RS reception and calibration-related information reporting, or perform calibration-related information reporting only. For example, the associated DL RS (or associated DL RS) is indicated by the CSI request field or "Calibration Report Request" in the DCI, and the UE should perform calibration-related information reporting based on the measurements of the associated DL RS (or associated DL RS).

[0298] In one example, an N-bit bitmap indicator can be used to trigger all or some of the N configured UL RS / DL RS associations to perform UL RS transmission and / or DL ​​RS reception and / or calibration-related information reporting. For example, the i-th bit of the bitmap indicator indicates whether the i-th association is triggered ("1") or not triggered ("0").

[0299] In one example, an N-bit bitmap indicator can be used to perform UL RS transmission and DL RS reception corresponding to the triggered DL RS / UL RS association and calibration-related information report.

[0300] In one example, an N-bit bitmap indicator can be used to perform a DL RS reception and calibration-related information report associated with the triggered DL RS / UL RS.

[0301] In one example, an N-bit bitmap indicator can be used to perform UL RS transmission and DL RS reception associated with a triggered DL RS / UL RS.

[0302] In one example, an N-bit bitmap indicator can be used to perform UL RS transmissions corresponding to triggered DL RS / UL RS association and calibration-related information reports.

[0303] In one example, an N-bit bitmap indicator can be used to perform a UL RS transmission associated with a triggered DL RS / UL RS.

[0304] In one example, an N-bit bitmap indicator can be used to perform DLRS reception corresponding to a triggered DL RS / UL RS.

[0305] In one example, an N-bit bitmap indicator can be used to execute a calibration-related information report corresponding to the triggered DL RS / UL RS.

[0306] In one example, an N-bit bitmap indicator can be transmitted via DCI.

[0307] In one example, an N-bit bitmap indicator can be transmitted via MAC-CE.

[0308] In one example, an N-bit bitmap indicator can be transmitted via RRC.

[0309] The number of triggered associations (e.g., M) can be fixed, or configured by the UE (via RRC) or reported.

[0310] Figure 25 Examples of N-bit bitmap indicators 2500 for triggering / indicating a subset of N DL RS / UL RS associations are shown according to various embodiments of the present disclosure. These examples are for illustrative purposes only, and other embodiments may be used without departing from the scope of the present disclosure.

[0311] In one example, all or some of N configured DL RS / UL RS associations can be triggered via a two-part DCI to perform UL RS transmission and / or DL ​​RS reception / measurement and / or calibration-related information reporting for calibration. For example, in the first part of the DCI, a 1-bit indicator is used to indicate whether all N configured DL RS(or more) / UL RS(or more) associations are triggered (“1”) or not triggered (“0”). If the first part of the DCI indicates that all associations are triggered, the second part of the DCI does not transmit any indicator for this purpose (and therefore may not exist / not be provided). If the first part of the DCI indicates that not all associations are triggered, the second part of the DCI conveys an N-bit bitmap indicator, where the N-bit bitmap indicator indicates which DL RS / UL RS associations are triggered to perform UL RS transmission and / or DL ​​RS reception / measurement and / or calibration-related information reporting for calibration.

[0312] In one example, an N-bit bitmap indicator can be used to perform UL RS transmission and DL RS reception corresponding to the triggering of DL RS / UL RS association and calibration-related information reports.

[0313] In one example, an N-bit bitmap indicator can be used to perform a DL RS reception and calibration-related information report associated with the triggered DL RS / UL RS.

[0314] In one example, an N-bit bitmap indicator can be used to perform UL RS transmission and DL RS reception associated with a triggered DL RS / UL RS.

[0315] In one example, an N-bit bitmap indicator can be used to perform UL RS transmissions corresponding to triggered DL RS / UL RS association and calibration-related information reports.

[0316] In one example, an N-bit bitmap indicator can be used to perform a UL RS transmission associated with a triggered DL RS / UL RS.

[0317] In one example, an N-bit bitmap indicator can be used to perform DLRS reception corresponding to a triggered DL RS / UL RS.

[0318] In one example, an N-bit bitmap indicator can be used to execute a calibration-related information report corresponding to the triggered DL RS / UL RS.

[0319] In another example, the first part of the DCI includes an N-bit bitmap. If the bitmap indicates that all associations are triggered, the second part of the DCI does not transmit any indications for this (and therefore may not exist). If the bitmap indicates that not all associations are triggered, the second part of the DCI conveys additional information about the triggered associations.

[0320] In another example, the first part of the DCI includes the value of M (the number of associations triggered). If M indicates that all associations are triggered, the second part of the DCI does not transmit any indicators for this (and therefore may not exist). If M indicates that not all associations are triggered, the second part of the DCI conveys information about the triggered associations (e.g., an index or bitmap or combination indicator for picking / selecting M from N).

[0321] In one embodiment, the UE can be configured to periodically or semi-persistently perform UL RS transmission and / or DLRS reception and / or calibration-related information reporting for calibration, wherein DL RS (or more) and UL RS (or more) are associated / configured in the manner described in the embodiments herein. All or some (a subset) of the configured DL RS / UL RS associations can be configured to periodically or semi-persistently perform UL RS transmission and / or DL ​​RS reception and / or calibration-related information reporting for calibration. For periodic operation, it can be configured with higher-level parameters, namely RRC parameters. For semi-persistent operation, activation / deactivation can be configured via DCI or MAC-CE.

[0322] In another embodiment, when the UE is configured to perform UL RS transmission, the UE designs a matched filter (MF) precoder (or beamformer, precoding vector / matrix, beamforming vector / matrix) determined by the DL channel measured from the associated DL RS (or multiple associated DL RS), and applies the precoder to the UL RS transmission.

[0323] In another embodiment, when the gNB or NW performs a DL RS transmission associated with UL RS (or multiple UL RSs), the NW designs a matched filter (MF) precoder (or beamformer, precoding vector / matrix, beamforming vector / matrix) determined by the UL channel measured from the associated UL RS (or multiple associated UL RSs) and applies the precoder to the DL RS transmission.

[0324] Various embodiments provide units for associating port groups for DL ​​RS and UL RS resources. In one embodiment, DL RS (e.g., CSI-RS) resources... Port groups and the calibration mechanism A UL RS (e.g., SRS) resource is associated / linked, where and Here, the “association” or “link” between the port group (or more) of the DL RS resource and the UL RS resource refers to at least one of the following examples:

[0325] In one example, the (UE's) precoder used to transmit UL RS resources is determined based on measurements of an associated port group of DL RS resources and UL RS resources.

[0326] In one example, the (UE's) precoder used to transmit UL RS resources is determined based on measurements of multiple associated port groups of DL RS resources and UL RS resources.

[0327] In one example, the precoder (of the gNB) for the port group used to transmit DL RS resources is determined based on measurements of a UL RS resource associated with the port group of DL RS resources.

[0328] In one example, the precoder (of the gNB) for the port group used to transmit DL RS resources is determined based on measurements of multiple UL RS resources associated with the port group of DL RS resources.

[0329] In one example, a group of ports of a DL RS resource is associated with a UL RS resource (e.g., for a calibration mechanism) in a one-to-one association. For convenience, this association may be referred to as a “one-to-one PG / RS association” in this disclosure, but should not be limited to the terminology, where PG stands for port group.

[0330] Figure 26 An example of a one-to-one PG / RS association 2600 according to an embodiment of the present disclosure is shown. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0331] In one example, a (many-to-one) DL RS resource Each port group is associated with a UL RS resource (e.g., for calibration mechanisms). In this disclosure, for convenience, such an association may be referred to as a "many-to-one PG / RS association," but should not be limited to that term.

[0332] Figure 27 An example of a many-to-one PG / RS association 2700 according to an embodiment of the present disclosure is shown. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0333] In one example, a port group of a (one-to-many) DL RS resource is associated with... A UL RS resource is associated (e.g., for calibration mechanisms). In this disclosure, for convenience, this association may be referred to as a "one-to-many PG / RS association," but should not be limited to that term.

[0334] Figure 28 An example of a one-to-many PG / RS association 2800 according to an embodiment of the present disclosure is shown. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0335] In one embodiment, any combination of one or more associations can be configured via higher-level (e.g., RRC) parameters (e.g., for calibration mechanisms), each association being a one-to-one, many-to-one, or one-to-many association as described in the embodiment.

[0336] In one example, the supported configurations may be subject to UE capabilities (i.e., the UE reports information about the types of associations it can support or combinations of multiple associations).

[0337] In another example, it can be configured A one-to-one PG / RS association (e.g., for calibration mechanisms). For example, A one-to-one PG / RS association can be shown in the figure below.

[0338] Figure 29 An example of N one-to-one PG / RS associations 2900 according to an embodiment of the present disclosure is shown. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0339] In one example, a many-to-one PG / RS association can be configured (e.g., for a calibration mechanism). For example, a many-to-one PG / RS association can be shown in the figure below.

[0340] Figure 30 An example of a many-to-one PG / RS association 3000 according to an embodiment of the present disclosure is shown. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0341] In one example, it can be configured A one-to-many PG / RS association (e.g., for calibration mechanisms). For example, A one-to-many PG / RS association can be shown in the figure below.

[0342] Figure 31 An example of N one-to-many PG / RS associations 3100 according to an embodiment of the present disclosure is shown. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0343] In one example, it can be configured Many-to-one PG / RS associations (e.g., for calibration mechanisms). For example, A many-to-one PG / RS association can be shown in the figure below.

[0344] Figure 32 An example of N many-to-one PG / RS associations 3200 according to an embodiment of the present disclosure is shown. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0345] In one example, it can be configured One-to-one PG / RS association, One-to-many PG / RS association and A many-to-one PG / RS association (e.g., for calibration mechanisms), wherein, ,and .For example, The situation is shown in the figure below.

[0346] Figure 33 Embodiments according to this disclosure are shown One-to-one PG / RS association, One-to-many PG / RS association and An example of a many-to-one PG / RS association 3300. This example is for illustrative purposes only, and other embodiments may be used without departing from the scope of this disclosure.

[0347] In this example, .

[0348] In one example, a combination of one or more one-to-one PG / RS associations and one or more many-to-one PG / RS associations can be configured (e.g., for calibration mechanisms).

[0349] In one example, a combination of one or more one-to-one PG / RS associations and one or more one-to-many PG / RS associations can be configured (e.g., for calibration mechanisms).

[0350] In one example, a combination of one or more many-to-one PG / RS associations and one or more one-to-many PG / RS associations can be configured (e.g., for calibration mechanisms).

[0351] In one example, a combination of one or more one-to-one PG / RS associations, one or more many-to-one PG / RS associations, and one or more one-to-many PG / RS associations can be configured (e.g., for calibration mechanisms).

[0352] In one embodiment, the high-level parameter usage of the UL RS set (e.g., SRS resource set) used for the calibration mechanism configuration can be set to a new use case term, such as "tddCjt", "tddCalib", "cjtCalib", "calibration", "none", etc.

[0353] In another embodiment, the high-level parameter usage of the UL RS set (e.g., SRS resource set) used for configuring the calibration mechanism can be set to an existing use case.

[0354] In one example, the high-level parameter usage can be set to "nonCodebook".

[0355] In another example, the high-level parameter usage can be set to "codebook".

[0356] In another example, the high-level parameter usage can be set to "antennaSwitching".

[0357] In another example, the high-level parameter usage can be set to "beamManagement".

[0358] In another embodiment, the associations described in the embodiments herein can be provided by existing high-level parameters.

[0359] In one example, the high-level parameter spatialRelationInfo of an SRS resource (or a set of SRS resources or multiple SRS resources) provides an association with the corresponding DL RS (e.g., CSI-RS) or the corresponding port group of the DL RS resource.

[0360] In another example, the high-level parameter associatedCSI-RS for an SRS resource set (or SRS resource or multiple SRS resources) provides the association with the corresponding DL RS (e.g., CSI-RS) or the corresponding port group of the DL RS resource.

[0361] In another example, the high-level parameter qclInfo or tciState of a CSI-RS resource (or a set of CSI-RS resources or multiple CSI-RS resources or one or more port groups) provides an association with the corresponding UL RS (e.g., SRS).

[0362] In another example, the high-level parameter associatedSRS for a CSI-RS resource set (or one or more CSI-RS resources or one or more port groups) provides the association with the corresponding UL RS (e.g., SRS).

[0363] In one embodiment, the UE can be triggered / instructed / configured to perform UL RS transmission and / or DL ​​RS reception / measurement and / or calibration-related information reporting for calibration via DCI, MAC-CE, or RRC, wherein the port groups of DL RS and UL RS are associated / configured in the manner described in the embodiments herein. Alternatively, all or some (a subset) of the configured DL RS / UL RS associations can be triggered to perform UL RS transmission and / or DL ​​RS reception / measurement and / or calibration-related information reporting for calibration. This trigger can be a DCI field in the DCI (DL-DCI, UL-DCI, or dedicated DCI). In one example, the DCI field can be "Calibration Request" or "CSI Request". In one instance, the DCI field is an existing DCI field, and the code point of said field is used to trigger the association. Optionally, the trigger can be via MAC CE or MAC CE+DCI. Later, MAC CE can be used to activate / select a subset of associations configured by RRC, and DCI can trigger associations from the activated subset.

[0364] In one example, the UE can be triggered / instructed / configured to jointly perform UL RS transmission and DL RS reception, as well as calibration-related information reporting. That is, the UE performs UL RS transmission and (subsequently) measures the configured DL RS port groups, wherein the precoder (e.g., matched filter precoder) for transmission of (each) port group of DL RS is determined based on the associated UL RS measurements on the NW side.

[0365] In another example, the UE can be triggered / instructed / configured to (individually) perform UL RS transmission and DL RS reception, as well as calibration-related information reporting, or perform DL RS reception and calibration-related information reporting, or perform calibration-related information reporting only. For example, the associated port group of the DL RS (or the associated port group of the DL RS) can be indicated via the CSI request field or "Calibration Report Request" in the DCI, and the UE should perform calibration-related information reporting based on measurements from the associated port group of the DL RS (or the associated port group of the DL RS).

[0366] In another example, an N-bit bitmap indicator can be used to trigger all or some of the N configured port groups of the DL RS / UL RS association to perform UL RS transmission and / or DL ​​RS reception / measurement and / or calibration-related information reporting for calibration. For example, the i-th bit of the bitmap indicator indicates whether the i-th association is triggered ("1") or not triggered ("0").

[0367] In one example, an N-bit bitmap indicator can be used to perform UL RS transmission and DL RS reception corresponding to the trigger port group associated with the DL RS / UL RS, as well as calibration-related information reporting.

[0368] In one example, an N-bit bitmap indicator can be used to perform DL RS reception and calibration-related information reporting corresponding to the trigger port group associated with the DL RS / UL RS.

[0369] In one example, an N-bit bitmap indicator can be used to perform UL RS transmission and DL RS reception corresponding to the port group associated with the triggered DL RS / UL RS.

[0370] In one example, an N-bit bitmap indicator can be used to execute UL RS transmission and calibration-related information reporting for a port group associated with the DL RS / UL RS trigger.

[0371] In one example, an N-bit bitmap indicator can be used to execute a UL RS transmission corresponding to a trigger port group associated with the DL RS / UL RS.

[0372] In one example, an N-bit bitmap indicator can be used to perform DL RS reception corresponding to the trigger port group of DL RS / UL RS.

[0373] In one example, an N-bit bitmap indicator can be used to perform a calibration-related information report corresponding to the port group of the triggered DL RS / UL RS.

[0374] In one example, an N-bit bitmap indicator can be transmitted via DCI.

[0375] In one example, an N-bit bitmap indicator can be transmitted via MAC-CE.

[0376] In one example, an N-bit bitmap indicator can be transmitted via RRC.

[0377] The number of triggered associations (e.g., M) can be fixed, or configured by the UE (via RRC) or reported.

[0378] Figure 34 An example of an N-bit bitmap indicator 3400 for triggering / indicating a subset of N DL PG / UL RS associations is shown according to an embodiment of this disclosure. This example is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0379] In one example, all or some of the N configured port groups associated with the DL RS / UL RS can be triggered via a two-part DCI to perform UL RS transmission and / or DL ​​RS reception / measurement and / or calibration-related information reporting for calibration. For example, in the first part of the DCI, a 1-bit indicator is used to indicate whether all N configured DL RS / UL RS associated port groups are triggered (“1”) or not triggered (“0”). If the first part of the DCI indicates that all associations are triggered, the second part of the DCI does not transmit any indicator for this (and therefore may be absent / not provided). If the first part of the DCI indicates that not all associations are triggered, the second part of the DCI conveys an N-bit bitmap indicator, where the N-bit bitmap indicator indicates which port groups of the DL RS / UL RS associated are triggered to perform UL RS transmission and / or DL ​​RS reception / measurement and / or calibration-related information reporting for calibration.

[0380] In one example, an N-bit bitmap indicator can be used to perform UL RS transmission and DL RS reception corresponding to the trigger port group associated with the DL RS / UL RS, as well as calibration-related information reporting.

[0381] In one example, an N-bit bitmap indicator can be used to perform DL RS reception and calibration-related information reporting corresponding to the trigger port group associated with the DL RS / UL RS.

[0382] In one example, an N-bit bitmap indicator can be used to perform UL RS transmission and DL RS reception corresponding to the port group associated with the triggered DL RS / UL RS.

[0383] In one example, an N-bit bitmap indicator can be used to execute UL RS transmission and calibration-related information reporting for a port group associated with the DL RS / UL RS trigger.

[0384] In one example, an N-bit bitmap indicator can be used to execute a UL RS transmission corresponding to a trigger port group associated with the DL RS / UL RS.

[0385] In one example, an N-bit bitmap indicator can be used to perform DL RS reception corresponding to the trigger port group of DL RS / UL RS.

[0386] In one example, an N-bit bitmap indicator can be used to perform a calibration-related information report corresponding to the port group of the triggered DL RS / UL RS.

[0387] In another example, the first part of the DCI includes an N-bit bitmap. If the bitmap indicates that all associations are triggered, the second part of the DCI does not transmit any indications for this (and therefore may not exist). If the bitmap indicates that not all associations are triggered, the second part of the DCI conveys additional information about the triggered associations.

[0388] In another example, the first part of the DCI includes the value of M (the number of associations triggered). If M indicates that all associations are triggered, the second part of the DCI does not transmit any indicators for this (and therefore may not exist). If M indicates that not all associations are triggered, the second part of the DCI conveys information about the triggered associations (e.g., an index or bitmap or combination indicator for picking / selecting M from N).

[0389] In one embodiment, the UE can be configured to periodically or semi-persistently perform UL RS transmission and / or DLRS reception / measurement and / or calibration-related information reporting for calibration, wherein the port groups of DL RS and UL RS are associated / configured in the manner described in the embodiments herein. All or some (a subset) of the configured port groups associated with DL RS / UL RS can be configured to periodically or semi-persistently perform UL RS transmission and / or DL ​​RS reception / measurement and / or calibration-related information reporting for calibration. For periodic operation, it can be configured with higher-level parameters, namely RRC parameters. For semi-persistent operation, activation / deactivation can be configured via DCI or MAC-CE.

[0390] In one embodiment, when the UE is configured to perform UL RS transmission, the UE designs a matched filter (MF) precoder (or beamformer, precoding vector / matrix, beamforming vector / matrix) determined by the DL channel measured from the associated port group (or multiple associated port groups of the DL RS), and applies the precoder to the ULRS transmission.

[0391] In another embodiment, when the gNB or NW performs DL RS transmission for a group of ports (multiple groups), the NW designs a matched filter (MF) precoder (or beamformer, precoding vector / matrix, beamforming vector / matrix) determined by the UL channel measured from the associated UL RS (or multiple associated UL RS), and applies the precoder to the group of ports (multiple groups) for the DL RS transmission.

[0392] Various embodiments involve reporting calibration-related information (e.g., phase offset). In one embodiment, the UE is configured to perform calibration-related information reporting, wherein the calibration-related information includes calibration coefficients and / or indicators indicating reference indices. In one example, the association mechanisms described in Embodiment 0 (e.g., between DL RS / UL RS, port group DL RS / UL RS, etc.) can be used / applied / configured. (A correlation) is used for calibration-related information reporting. In another example, it can be configured via higher-level, MAC-CE, or DCI signaling. A DL RS (e.g., CSI-RS, TRS) resource (or resource set). In another example, DL RS (e.g., CSI-RS) resources can be configured by higher-level, MAC-CE, or DCI signaling. Port groups. In one example... In one example, .

[0393] In one example Each DL RS resource (or resource set) is also configured via higher-level signaling, MAC-CE, or DCI for the UE to perform calibration-related information reporting.

[0394] In one example Each DL RS resource (or resource set) is also configured via higher-level signaling, MAC-CE, or DCI for the UE to perform calibration-related information reporting.

[0395] In one example, the UE reports all Calibration-related information for each DL RS resource (or resource set) (i.e., there is no information for UE reporting). Further configuration of a subset of DL resources / resource sets).

[0396] In one example Each DL RS resource (or resource set) is determined / selected by the UE and included in the CSI report, which includes calibration-related information, via an indicator. In one example, the value of N can be configured via higher-layer signaling or MAC-CE or DCI. In one example, the size is... The (combined) indicator is used to indicate the selected One DL RS resource / resource set. In one example, the value of N is not configured. In one example, Bitmap indicator is used to indicate the selected One DL RS resource / resource set.

[0397] In one example Each phase value is included in the calibration-related information report.

[0398] In one example, it includes an indicator pointing to a reference resource / port group / port / association index / resource set, and is included in the calibration-related information report. A phase value, where the reference index is determined by the UE. In one instance, the indicator is a value with... bit size (or if) ,but A combination indicator (bit size). In one example, the indicator is an N-bit bitmap indicator. In another example, the indicator is either a 2-bit or a 4-bit indicator, regardless of... or In one example, the phase coefficient corresponding to the reference index is used to determine... A phase value (e.g., relative phase) (i.e., the coefficient reference index is set to 1 and therefore not reported).

[0399] In one example Each phase value is included in the calibration-related information report, where the reference resource / port group / port / association / resource set index is configured by the NW or predetermined by rules (e.g., fixed to the lowest / highest resource / resource set index). In one example, the phase value is determined based on the phase coefficient corresponding to the reference index. A phase value (e.g., relative phase) (i.e., the coefficient reference index is set to 1 and therefore not reported).

[0400] In one example The phase units / amplitude values ​​are included in the calibration-related information report.

[0401] In one example, an indicator is included to indicate the reference resource / port group / port / association / resource set index, and this is also included in the calibration-related information report. A phase / amplitude value, where the reference index is determined by the UE. In one example, the indicator is a value with... bit size (or if) ,but A combination indicator (bit size). In one example, the indicator is an N-bit bitmap indicator. In another example, the indicator is either a 2-bit or a 4-bit indicator, regardless of... or In one example, the phase / amplitude coefficients corresponding to the reference index are used to determine (i.e., the coefficient reference index is set to 1 and therefore not reported). A phase / amplitude value (e.g., relative phase / amplitude).

[0402] In one example Each phase / amplitude value is included in the calibration-related information report, where the reference resource / port group / port / association / resource set index is configured by the NW or predetermined by rules (e.g., fixed to the lowest / highest resource / resource set index). In one example, the phase value is determined based on the phase coefficient corresponding to the reference index (i.e., the coefficient reference index is set to 1 and therefore not reported). A phase / amplitude value (e.g., relative phase / amplitude).

[0403] In one example Each phase / power (amplitude squared) value is included in the calibration-related information report.

[0404] In one example, an indicator is included to indicate the reference resource / port group / port / association / resource set index, and this is also included in the calibration-related information report. A phase / power value, where the reference index is determined by the UE. In one instance, the indicator is a value with... bit size (or if) ,but A combination indicator (bit size). In one example, the indicator is an N-bit bitmap indicator. In another example, the indicator is either a 2-bit or a 4-bit indicator, regardless of... or In one example, the phase / power coefficient corresponding to the reference index is used to determine... A phase / power value (e.g., relative phase / power) (i.e., the coefficient reference index is set to 1 and therefore is not reported).

[0405] In one example Each phase / power value is included in the calibration-related information report, where the reference resource / port group / port / association / resource set index is configured by the NW or predetermined by rules (e.g., fixed to the lowest / highest resource / resource set index). In one example, the phase value is determined based on the phase coefficient corresponding to the reference index (i.e., the coefficient reference index is set to 1 and therefore not reported). Phase / power values ​​(e.g., relative phase / power).

[0406] In one example, the coefficients described above can be reported at the subband level, the broadband level, or any other granularity level (e.g., RE / PRB / subcarrier). A resource index (e.g., subband index or number of subbands) corresponding to the coefficients to be reported for calibration can be configured.

[0407] In one embodiment, the UE can be configured to report phase offset values. ,in The reference CSI-RS resource / resource set representing the nth CSI-RS resource / resource set and the mth frequency element (e.g., the mth subband (SB)). The measured phase offset between them. In one example, the payload size of the phase offset value is ,in It is used for quantification The number of bits for each phase offset value.

[0408] In another example, The phase offset for SB can be different. In this case... For example, M=2.

[0409] Various embodiments relate to the granularity of each sub-band used for phase offset reporting (e.g., the size of each frequency unit). In one embodiment, the size of the frequency unit used for phase offset reporting (or the granularity of the sub-band used for phase offset reporting) depends on the size of the SB (i.e., associated with it), for example... ,in It is fixed, configured (e.g., via RRC, MAC-CE, or DCI), or determined by the UE, and It is the size of SB. In one example, In one example, In one example, In one example, In one example, and Configured by NW (e.g., via RRC, MAC-CE, or DCI) or determined by UE and via size The bit indicator is included in the CSI report, where It is a set that includes at least one of the values ​​1, 2, 4, and 8, and yes The base number.

[0410] In one embodiment, the size of the frequency unit used for phase offset reporting (or the granularity of the sub-band used for phase offset reporting) depends on the size of the RB (i.e., is associated with the size of the RB), for example, ,in It is either fixed, configured (e.g., via RRC, MAC-CE, or DCI), or determined by the UE, and This is the size of RB. In one example, In one example, In one example, In one example, In one example, In one example, and Configured by NW (e.g., via RRC, MAC-CE, or DCI) or determined by UE and via size The bit indicator is included in the CSI report, where It is a set that includes at least one of the values ​​4, 8, 16, 32, and 64, and Yes Cardinal number.

[0411] In one example Including 16.

[0412] In one example Including 8 and 16.

[0413] In one example Including 16 and 32.

[0414] In one example Including 8, 16, and 32.

[0415] In one example Including 1, 2, 4, 8, and 16.

[0416] In one example, the configurable candidate value for the size of the frequency unit used for phase offset reporting depends on the total number of RBs (PRBs) in the bandwidth portion (BWP), where It is a collection of configurable values ​​used for the BWP collection. , .

[0417] In one example Corresponding to the description in the example above Examples.

[0418] In one example, for the value i, ,in and .

[0419] In one example It is at least one of the following values: 16, 24, 32, 52, 64, 96, 104, 128, 156, 160, 192, 204.

[0420] In one example It is at least one of the following values: 32, 52, 64, 96, 104, 128, 156, 160, 192, 208, 275.

[0421] In one example, for the value i, .

[0422] In one example, for the value i, .

[0423] In one example, for the value i, .

[0424] In one example, for the value i, .

[0425] In one example, for the value i, .

[0426] In one example, for the value i, .

[0427] In one example, for the value i, .

[0428] In one example, the configurable candidate values ​​are the same regardless of the BWP size, that is, for , .

[0429] In one example, the total number of RBs used for phase offset reporting in the BWP can be configured up to a maximum value.

[0430] For example, the maximum value is the value corresponding to x MHz, where x is a value less than 100.

[0431] For example, the maximum value is the value corresponding to 10 MHz.

[0432] For example, the maximum value corresponds to 20 MHz.

[0433] For example, the maximum value corresponds to 30 MHz.

[0434] For example, the maximum value corresponds to 40 MHz.

[0435] For example, the maximum value corresponds to 50 MHz.

[0436] For example, the maximum value corresponds to y(RB), where y < 275.

[0437] For example, the maximum value corresponds to 52 (RB).

[0438] For example, the maximum value corresponds to 104 (RB).

[0439] For example, the maximum value corresponds to 156 (RB).

[0440] For example, the maximum value corresponds to 208 (RB).

[0441] In one embodiment, the size of the frequency unit used for phase offset reporting (or the granularity of the subband used for phase offset reporting) depends on (i.e., is associated with) the size of the frequency band used for phase offset reporting (i.e., the total bandwidth or frequency band of the configuration used for phase offset reporting, such as reportFreqConfiguration). In one example, the size of the frequency unit can be derived from... (or Export, where is Fixed, configured (e.g., via RRC, MAC-CE, or DCI) or determined by the UE, and It is the size of the total configured bandwidth (configured bandwidth portion (BWP)).

[0442] In one example ,

[0443] In one example In one example, In one example, and Configured by NW (e.g., via RRC, MAC-CE, or DCI) or determined by UE and via size The bit indicator is included in the CSI report, where It is a set that includes at least one of the values ​​2, 4, and 8, and yes The base number.

[0444] Various embodiments involve the number of sub-bands / frequency bands used for phase offset reporting (i.e., (value).

[0445] In one embodiment, the number of sub-bands / frequency bands used for phase offset reporting Fixed as In one example, (That is, the WB report). In one example. In one example, In one example, In one example, In one example, In this case, it can be based on the total configuration bandwidth size used for phase offset reporting and a fixed number of sub-bands. To determine the granularity of subbands / frequency bands.

[0446] In one embodiment, the number of sub-bands / frequency bands used for phase offset reporting Configured by NW (e.g., via RRC) (MAC-CE or DCI). In one example, (i.e., WB report). In one example, In one example, In one example, In one example, In one example, In one instance, and Configured by NW (e.g., via RRC, MAC-CE, or DCI), where It is a set that includes at least one of the values ​​1, 2, 4, 8, and 16.

[0447] In one example, the maximum number of M is defined as M max In one example, M max =16. In one example, M max =8. In one example, M max =12. In one example, M max =13. In one example, M max=14. In one example, M max =15. In one example, M max =11. In one example, M max =10. In one example, M max =9. In one example, M max It can be made by N SB-P The maximum value is represented in one example. Including less than or equal to M max M values. In one example, when M max =16, Including 1, 2, 3, 4, ..., 16. In one example, when M... max When =12, Including 1, 2, 3, 4, ..., 12. In one example, when M... max When =8, Including 1, 2, 3, 4, ..., 8.

[0448] In one example, M max Depending on other parameters (or more), such as the alphabet size (or bits) used for phase offset quantization (described in this invention). (or ).

[0449] In one example, for M max =m1, and for M max =m2, where Includes at least one of the values ​​8, 9, 10, ..., 16, and Includes at least one of the values ​​8, 9, 10, ..., 16.

[0450] In one example, for M max =m1, and for M max =m2.

[0451] In one example, for M max =m1, and for M max =m2.

[0452] In one example, for M max =m1, and for M max =m2.

[0453] In one example, for ,(or M max =16, and for ,(or M max =8.

[0454] In one example, for ,(or M max =16, and for ,(or M max =8.

[0455] In one example, for (or M max =16, and for Or 512, ( Or 9), M max =8.

[0456] In one example, for (or M max =16, and for , ( Or 9), M max =8.

[0457] In one example, for (or M max =16, and for Or 128, (or Or 7), M max =8.

[0458] In one example, for (or M max =16, and for ,(or Or 7), M max =8.

[0459] In one example, M max It does not depend on any other parameters, for example, it is fixed to a certain value as described above (e.g., 16, 12, 8...).

[0460] In one embodiment, the number of sub-bands / frequency bands used for phase offset reporting By NW (e.g., via RRC, MAC) -CE or DCI) configuration, similar to the legacy framework for CQI reporting, for example, csi-ReportingBand.

[0461] In an embodiment, the number of subbands / frequency bands for phase offset reporting is determined by a UE. In one example, (i.e., WB reporting). In one example, . In one example, . In one example, . In one example, In one example, . In one example, is determined by the UE and is included in a CSI report via an indicator of size , where is a set comprising at least one of the values 1, 2, 4, 8 and 16, and is the cardinality.

[0462] In an embodiment, there may be subbands / frequency bands on the total configured frequency band (depending on the granularity of SB described in the present disclosure or the legacy definition). The number of subbands / frequency bands for phase offset reporting is less than or equal to the possible subbands / frequency bands on the total configured frequency band (i.e., ).

[0463] In one example, subband indices among K subbands / frequency bands are configured via higher layer signaling for each of the M subbands for phase offset reporting (when M<K). In one example, RRC bits are used to indicate the M subbands.

[0464] In one example, a K-bit bitmap is configured via higher layer signaling to indicate M subbands among K subbands / frequencies for phase offset reporting. In this case, in one example , RRC bits are used to indicate the M subbands.

[0465] In one example, the maximum configurable number of K is defined as K max .

[0466] In one example, K max =4. In one example, K max =8. In one example, K max =5. In one example, K max =6. In one example, K max =7. In one example, Kmax =9. In one example, K max =10. In one example, K max =11. In one example, K max =12. In one example, K max =13. In one example, K max =14. In one example, K max =15. In one example, K max =16. In one example, K max =275.

[0467] In one example, the UE reports the phase offset corresponding to each of the K SBs (i.e., M=K).

[0468] In one example, the UE reports the phase offset corresponding to each SB in a subset of K SBs (i.e., M≤K).

[0469] In one embodiment, when hour, One (when) (At that time) Two of the possible SBs are based on at least one of the following examples.

[0470] In one example, the first and second SBs are fixed to the SB for which the UE reports the phase offset value.

[0471] In one example, the first and last SBs are fixed as the SBs for the UE to report the phase offset values.

[0472] In one example, the first and second-to-last SBs are fixed as the SBs for the UE to report the phase offset values.

[0473] In one example, any two SBs are fixed to the SB for which the UE reports the phase offset value.

[0474] In one example, any two SBs used for phase offset reporting are configured by NW via higher-level signaling (or MAC-CE or DCI).

[0475] In one example, any two SBs used for phase offset reporting are determined by the UE and included in the CSI report via an indicator. In one example, the indicator is a... A combination indicator of bit size. In one example, the indicator is one with... Bitmap indicator of bit size.

[0476] In one example, one SB used for phase offset reporting is fixed, and another SB used for phase offset reporting is configured by the NW via higher-level signaling (or MAC-CE or DCI). In one example, the fixed SB is the first SB. In one example, the fixed SB is the last SB. In one example, the fixed SB is the penultimate SB.

[0477] In one example, one SB used for phase offset reporting is fixed, and another SB used for phase offset reporting is determined by the UE and included in the CSI report via an indicator. In one example, the fixed SB is the first SB. In one example, the fixed SB is the last SB. In one example, the fixed SB is the second-to-last SB. In one example, the indicator is of size [size missing]. Combination indicators.

[0478] In one example, the indicator is of size Bitmap indicator.

[0479] In one example, one SB used for phase offset reporting is configured by the NW via higher-layer signaling (or MAC-CE or DCI), and another SB used for phase offset reporting is determined by the UE and included in the CSI report via an indicator. In one example, the indicator is of size [size missing]. A combination of indicators. In one example, the indicator is of size [size missing]. Bitmap indicator.

[0480] In one example, an additional indicator is used to indicate the phase rotation relative to the phase offset value of the first SB with respect to the phase offset value of the second SB (e.g., The code points corresponding to the information (, ...).

[0481] For example, the indicator is a 1-bit indicator to indicate phase rotation 0 and The two corresponding code points.

[0482] For example, the indicator is a 2-bit indicator used to indicate four code points, where two of the four code points correspond to phase rotation 0 and 2. .

[0483] For example, the indicator is a 2-bit indicator used to indicate four code points, where three of the four code points correspond to phase rotation 0, ... and 4 .

[0484] For example, the indicator is a 2-bit indicator used to indicate four code points, where three of the four code points correspond to phase rotation 0, ... and -2 .

[0485] For example, the indicator is a 3-bit indicator used to indicate eight code points, where two of the eight code points correspond to phase rotation 0 and 2. .

[0486] For example, the indicator is a 3-bit indicator used to indicate eight code points, where three of the eight code points correspond to phase rotation 0, ... and 4 .

[0487] For example, the indicator is a 3-bit indicator used to indicate eight code points, where three of the eight code points correspond to phase rotation 0, ... and -2 .

[0488] For example, the indicator is a 1-bit indicator to indicate phase rotation 0 and The two corresponding code points.

[0489] For example, the indicator is a 2-bit indicator used to indicate four code points, where two of the four code points correspond to phase rotation 0 and 2. .

[0490] For example, the indicator is a 2-bit indicator used to indicate four code points, where three of the four code points correspond to phase rotation 0, ... and -4 .

[0491] For example, the indicator is a 2-bit indicator used to indicate four code points, where three of the four code points correspond to phase rotation 0, ... and 2 .

[0492] For example, the indicator is a 3-bit indicator used to indicate eight code points, where two of the eight code points correspond to phase rotations 0 and -. .

[0493] For example, the indicator is a 3-bit indicator used to indicate eight code points, where three of the eight code points correspond to phase rotation 0, ... and -4 .

[0494] For example, the indicator is a 3-bit indicator used to indicate eight code points, where three of the eight code points correspond to phase rotation 0, ... and 2 .

[0495] For example, information about phase rotation can correspond to how much the phase value has rotated, i.e., 0, 1, 2, etc. In this case, 0 means 0, 1 means 2, etc. And 2 means .

[0496] In one embodiment, when hour, (when Three of the possible SBs are based on at least one of the following examples.

[0497] In one example, the first three SBs are fixed to the SB for which the UE reports the phase offset value.

[0498] In one example, the first, middle, and last SBs are fixed as the SBs for the UE to report the phase offset values.

[0499] In one example, the first, middle, and penultimate SBs are fixed as the SBs for the UE to report the phase offset values.

[0500] In one example, any three SBs are fixed to the SB for which the UE reports the phase offset value.

[0501] In one example, any three SBs used for phase offset reporting are configured by NW via higher-level signaling (or MAC-CE or DCI).

[0502] In one example, any three SBs used for phase offset reporting are determined by the UE and included in the CSI report via indicators. In one example, the indicator is a... A combination indicator of bit size. In one example, the indicator is one with... Bitmap indicator of bit size.

[0503] In one embodiment, when hour, (when M of the possible SBs are based on at least one of the following examples.

[0504] In one example, the first M SBs are fixed to the SB for which the UE reports the phase offset value.

[0505] In one example, the first, the middle M-2, and the last SB are fixed as the SB for the UE to report the phase offset value.

[0506] In one example, the first, the middle M-2, and the penultimate SBs are fixed as the SBs for the UE to report its phase offset values.

[0507] In one example, any M SBs are fixed to the SB for which the UE reports the phase offset value.

[0508] In one example, any M SBs used for phase offset reporting are configured by NW via higher-level signaling (or MAC-CE or DCI).

[0509] In one example, any M SBs used for phase offset reporting are determined by the UE and included in the CSI report via an indicator. In one example, the indicator is a... A combination indicator of bit size. In one example, the indicator is one with... Bitmap indicator of bit size.

[0510] In one embodiment, The configurable values ​​are subsets of {1, 2, ..., 18}. For example, a subset includes {1,2,3, ..., 8}. Another example is a subset including {1,2,4,8}. In another example, a subset includes 1, 2, 3, 4, ..., or 18. In yet another example, a subset does not include 1, 2, 3, 4, ..., or 18.

[0511] In one embodiment, the size of SB is determined by the UE and included in a report (i.e., a calibration report), wherein the size of SB is selected from a set S comprising values, wherein the value is based on at least one of the following examples.

[0512] In one example, this value corresponds to 16 PRBs.

[0513] In one example, this value corresponds to 8 PRBs.

[0514] In one example, this value corresponds to min(16,BWP) PRBs (RBs), where BWP is the portion of bandwidth (in PRBs) configured for the CSI-RS resource / resource set used to measure phase offset values.

[0515] In one example, this value corresponds to min(8,BWP) PRBs (RBs).

[0516] In one example, this value corresponds to ceiling(BWP / c), where c = 1, 2, 4, or 8, and ceiling(x) is the floor function that provides the smallest integer value not less than x.

[0517] In one example, this value corresponds to flooring(BWP / c), where c = 1, 2, 4, or 8, and flooring(x) is a floor function that provides the largest integer value not greater than x.

[0518] In one example, this value corresponds to min(X,ceiling(BWP / c)) PRBs (RBs), where c = 1, 2, 4, or 8.

[0519] In one example, this value corresponds to min(X, floor(BWP / c)) PRBs (RBs), where c = 1, 2, 4, or 8.

[0520] In this embodiment, the size of the SB is determined by the UE and included in the report (as described in the example of the above embodiment), and the phase values ​​of two (or more) SBs are included in the report. Two (or more) SBs are at least one example according to the description herein.

[0521] In this embodiment, the SB phase offset value is calculated with respect to the WB phase offset value or the adjacent SB phase offset value (differential SB PO value).

[0522] In one example, the WB phase offset value is selected / indicated using the alphabet set described in the embodiments herein, and each SB phase offset value is calculated using a range smaller than [0, 2π] with respect to the indicated WB phase offset value, which has a payload size smaller than the alphabet set.

[0523] In another example, a first SB phase offset value is selected / indicated via an alphabet set described in the embodiments herein, and a second SB (adjacent to the first SB) phase offset value is calculated with respect to the first SB phase offset value using a range smaller than [0, 2pi] with a smaller payload size than the alphabet set. A third SB (adjacent to the second SB) phase offset value is calculated with respect to the second phase offset value using a range smaller than [0, 2pi] with a smaller payload size, and similarly for a fourth SB phase offset value, and so on.

[0524] In one embodiment, the UE can be configured to report information related to the phase offset value. In one example, this information includes the initial phase value. and slope value ,for Among them, CSI-RS resources / resource sets This refers to a CSI-RS resource / resource set. In one example, for SB, k=0,…, K, the phase offset can be calculated. .

[0525] In one example, the slope value can be quantified / reported based on at least one of the following examples.

[0526] In one example, the slope value The alphabet can be -PSK, for example .

[0527] In one example Either 32 or another value greater than 32. In one example, =64 or In another example, or .

[0528] In one example, the slope value The alphabet set can be a truncation range of [0, 2π]. -PSK (i.e., not the entire space [0, 2π].

[0529] In one example, the cutoff range could be ,in .

[0530] In one example, the cutoff range could be ,in .

[0531] In one example, the cutoff range could be Where x > 1. In one example, x = 2. In one example, x = 4. In one example, x is determined in a predefined rule. In one example, x can be configured by the NW or reported by the UE.

[0532] In one example, when the subcarrier spacing (SCS) is configured to 15 kHz, It can be set to 2.

[0533] In one example, when the size of SB is configured to 8, It can be set to 2.

[0534] In one example, when configuring the size of SB=8 and SCS=15 kHz, x can be set to 2.

[0535] In one example, the cutoff range could be Where x > 1. In one example, x = 2. In one example, x = 4. In one example, x is determined in a predefined rule. In one example, x can be configured by the NW or reported by the UE.

[0536] In one example, when the subcarrier spacing (SCS) is configured to 15 kHz, It can be set to 2.

[0537] In one example, when the size of SB is configured to 8, It can be set to 2.

[0538] In one example, when configuring the size of SB=8 and SCS=15 kHz, x can be set to 2.

[0539] In one embodiment, there are two modes for (subband) phase offset reporting, mode A and mode B, and the NW can configure the UE to perform the corresponding phase offset reporting in one of the two modes.

[0540] In one example, pattern A corresponds to one of the examples described in the embodiments herein, and pattern B corresponds to one of the examples described in other embodiments herein.

[0541] In one example, mode A corresponds to the UE reporting the phase offset of each of the K SBs configured, where the K SBs correspond to the configured BWP, and mode B corresponds to the UE reporting the initial phase value. and slope value The situation.

[0542] In one example, mode A corresponds to a subset of the K SBs configured in the UE report ( The phase offset of each of the following is given, where K SBs correspond to the configured BWP, and mode B corresponds to the UE reporting the initial phase value. and slope value The situation.

[0543] In one example, mode A corresponds to the phase offset of each of the K configured SBs reported by the UE, where the K SBs correspond to the configured BWP, and mode B corresponds to a subset of the K configured SBs reported by the UE. The phase shift of each of them.

[0544] In one embodiment, the maximum number of sub-bands (SBs) used for SB phase offset reporting (For example, reportQuantity set to "cjtc-P" is determined based on the maximum number of information bits (i.e., 1706 bits) supported by the polar code on the PUSCH transmission.

[0545] For example, determine the maximum quantity This ensures that any configuration used for SB phase offset reporting will not produce 1706 bits or more.

[0546] For example, configurations that do not support SB phase offset reports exceeding 1706 bits (regarding the number of subbands, CSI-RS resources (TRPs), and the number of phase offset quantizations) are not supported.

[0547] For example, it is not expected that the UE will be configured with a number of SBs that cause 1706 bits or more in the SB phase offset report.

[0548] Various embodiments relate to alphabet sets used for calibration coefficients.

[0549] In one embodiment, calibration coefficients are reported to the NW using an alphabetic set. For example, phase and / or amplitude (power) coefficients can be quantized according to the corresponding alphabetic set.

[0550] In one example, the alphabet set for the phase coefficients can be designed similarly to the alphabet set for phase coefficients in Rel-15 / 16 / 17 type IICSI alphabets, for example, 8-PSK (3 bits per phase), 16-PSK (4 bits per phase), or 256-PSK (8 bits per phase). Because the calibration process requires high precision, a high-resolution quantization codebook, such as 256-PSK, may be necessary. In one example, the alphabet set for the phase coefficients can be configured by higher-level signaling or MAC-CE or DCI signaling, ranging from 8PSK (3 bits per phase) to 256PSK (8 bits per phase). In another example, - The PSK alphabet can be used for phase coefficients, where X = 2, 3, 4, 5, 6, 7, ...

[0551] In one example, X=4 is fixed. In another example, X=3 is fixed. In yet another example, X=5 is fixed. The total number of quantized states.

[0552] In one example, it can be indicated via an X-bit indicator that indicates a value in the alphabet set. The value, where the alphabet set includes and Between or and The uniform quantization value between them.

[0553] In one example ,

[0554] In one example, if the range of the alphabet set is 0 to... ,but .

[0555] In one example .

[0556] In one example .

[0557] In one example ,in It is a natural number.

[0558] In one example, when the quantized value is and When quantized uniformly, the alphabet set includes .

[0559] In one example, when the quantized value is Between During uniform quantization, the alphabet set includes .

[0560] In one example, when the quantized value is and When quantized uniformly, the alphabet set includes .

[0561] In one example, when the quantization value is between 0 and When quantized uniformly, the alphabet set includes .

[0562] In one example, the alphabet set includes "invalid states" (or "empty", "out of range", or states indicating that the measurement quality is below a threshold). For example, the alphabet set... .

[0563] In one example, the alphabet set does not include "invalid states" (or "empty", "out of range", or states indicating measurement quality below a threshold). For example, the alphabet set .

[0564] In one embodiment, when a phase offset report with M>1 is configured (i.e., an SB report), the phase offset value is reported via a two-part UCI framework, where UCI part 1 includes a size indicating the CSI-RS resource / resource set selection. The bitmap indicator, and UCI section 2 contains SB phase offset indicators for each selected CSI-RS resource (designed based on an example described in this disclosure).

[0565] In one embodiment, regardless of whether the phase offset reporting is configured with M>1 or M=1, the phase offset value is reported via a portion of the UCI framework.

[0566] In one example, the alphabet for amplitude coefficients is designed to resemble the alphabet for amplitude coefficients in the Rel-15 / 16 / 17 Type-II CSI codebook. For example, a 3-bit or 4-bit amplitude alphabet. An example is shown below:

[0567] Four-bit amplitude alphabet

[0568]

[0569] Three-bit amplitude codebook

[0570]

[0571] In one example, the alphabet set used for the amplitude coefficients contains elements whose values ​​are greater than 1. Note that, for example, when a reference value is not determined, it is not guaranteed that the amplitude coefficients used for calibration will be less than 1. An example of a 4-bit alphabet set is shown below:

[0572] Four-bit amplitude alphabet

[0573]

[0574] In one example, the alphabet for the power value could be a 3-bit or 4-bit amplitude alphabet. One example is the square of the amplitude designed in the related examples above.

[0575] In one example, the alphabetic set of power values ​​contains elements whose values ​​are greater than 1. Note, for example, that the power value used for calibration is not guaranteed to be less than 1 when no reference value is determined.

[0576] In one embodiment, it can be based on the existing CSI type-I / II specified in Rel-15 / 16 / 17 / 18. At least one of the port DL alphabet sets is used to design calibration-related information reports. For example, the associations described in the examples of the embodiments herein can be linked to... Port DL alphabet set.

[0577] In one example, DL RS A port group (associated with, for example, one or more UL RS, etc.) can be linked to for -Port DL alphabet set -port.

[0578] In one example Each DL RS (associated with, for example, UL RS or UR RS) can be linked to for -Port DL alphabet set -port.

[0579] …

[0580] In one embodiment, the UE may initiate a calibration operation by sending a UCI or UL MAC-CE (similar to a scheduling request (SR)), for example, one of the operations described in the examples / embodiments below.

[0581] Figure 35 An example diagram for a calibration reporting process 3500 is shown according to an embodiment of this disclosure. This example is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0582] In this embodiment, at least one of the embodiments / examples described herein can be used to perform calibration of the UE 3505 across multiple TRPs 3510a-3510d (to align TDD uplink-downlink reciprocity).

[0583] Figure 36 An example method 3600 performed by a UE in a wireless communication system according to an embodiment of the present disclosure is shown. Figure 36 Method 3600 can be used by Figure 1 Any of UE 111-116 (such as Figure 3 The UE 116) is executed, and the corresponding method can be performed by Figure 1 Any of BS 101-103 (such as Figure 2 The method is performed according to BS 102. Method 3600 is for illustrative purposes only, and other embodiments may be used without departing from the scope of this disclosure.

[0584] This method begins when the UE receives information about the CSI report (3610). For example, in 3610, it is indicated that... Information about each antenna group, the number of reports set to PO report, and the size of the SB. The size of the SB is "wideband" or 1, 2, 4, 8, or 16 PRBs, and Greater than 1. In various embodiments, from Each of the antenna groups corresponds to a CSI-RS resource set or a CSI-RS resource. In various embodiments, the reference antenna group consists of... A reference indicator for the size of the bit payload.

[0585] Then, the UE determines the reference antenna group based on this information. (3620). Then, the UE determines... CLI (3630) for each of the antenna groups. Then, the UE sends a CSI report (3640) including a CLI indicator indicating the reference antenna group and the CLI. For example, in 3640, the CLI includes information about... And the phase offset value for each SB , Where M is less than or equal to 16. In various embodiments, when the size of SB is "wideband", the value of M is equal to 1.

[0586] In various embodiments, the phase offset value The phase offset value is indicated by an X-bit indicator. Corresponding to including The values ​​in the alphabet set of code point values, where... and Each code point value includes and The values ​​are uniformly quantized between them. In various embodiments, the UE receives via Radio Resource Control (RRC) signaling. The value, and The values ​​include 16 and 32. In various embodiments, The individual code point value is determined by Given, and the code point "invalid" corresponds to the invalid state.

[0587] Any of the above-described variant embodiments can be used independently or in combination with at least one other variant embodiment. The flowcharts above illustrate example methods that can be implemented according to the principles of this disclosure, and various changes can be made to the methods shown in the flowcharts herein. For example, although shown as a series of steps, the individual steps in each figure may overlap, occur in parallel, occur in different orders, or occur multiple times. In another example, steps may be omitted or replaced with other steps.

[0588] Although this disclosure has been described using exemplary embodiments, various changes and modifications may be suggested to those skilled in the art. This disclosure is intended to cover such changes and modifications that fall within the scope of the appended claims. Nothing described in this application should be construed as implying that any particular element, step, or function is an essential element that must be included within the scope of the claims. The scope of the patent subject matter is defined by the claims.

Claims

1. A user equipment (UE) in a wireless communication system, the UE comprising: transceiver; as well as At least one processor, coupled to the transceiver, is configured as follows: Receive information from the base station regarding Channel State Information (CSI) reports, which instruct the antenna group. The reference antenna group is determined based on the information provided. Determine the calibration-related information (CLI) associated with the antenna group, and Send a CSI report to the base station, including CLI indicators that indicate the reference antenna group and CLI.

2. The UE according to claim 1, in, The information indicator is set to at least one of the number of phase offset (PO) reports and the size of the sub-band (SB).

3. The UE according to claim 1, in, CLI includes phase offset values, and The number of antenna groups corresponds to the number of transmit / receive points (TRPs).

4. The UE according to claim 2, in, The size of an SB is either bandwidth or 1, 2, 4, 8, or 16 Physical Resource Blocks (PRBs).

5. The UE according to claim 1, wherein, Each antenna group in the antenna array corresponds to a CSI Reference Signal (CSI-RS) resource set or a CSI-RS resource, and The reference antenna group is indicated by a reference indicator, and the payload size of the reference indicator is related to the number of TRPs corresponding to the number of antenna groups.

6. The UE according to claim 1, wherein: The phase offset value is indicated by an indicator with a size of X bits. Phase offset value and included The values ​​in the alphabet set of each code point value correspond to the values ​​in the alphabet, where ,and Individual code point values ​​include and The uniform quantization value between them.

7. The UE according to claim 6, wherein, At least one processor is also configured to: Received via Radio Resource Control (RRC) signaling The value in the code point value.

8. The UE according to claim 6, wherein: The individual code point value is determined by Given: " The code point "" corresponds to an invalid state.

9. The UE according to claim 1, in, CLI includes targeting And the phase offset value for each SB , Where M is less than or equal to 16, and When the size of SB is "wideband", the value of M is equal to 1.

10. A base station (BS) in a wireless communication system, the BS comprising: transceiver; as well as At least one processor, coupled to the transceiver, is configured as follows: Send information about channel state information (CSI) reports to the user equipment (UE), the information indicating the antenna group, and Receive a CSI report from the UE, including CLI indicators that indicate the reference antenna group and calibration-related information (CLI). The reference antenna group is based on the information, and CLI is related to the antenna group.

11. The BS according to claim 10, in, The information indicator is set to at least one of the number of phase offset (PO) reports and the size of the sub-band (SB).

12. The BS according to claim 10, in, CLI includes phase offset values, and The number of antenna groups corresponds to the number of transmit / receive points (TRPs).

13. The BS according to claim 10, wherein, Each antenna group corresponds to a CSI Reference Signal (CSI-RS) resource set or CSI-RS resource, and The reference antenna group is indicated by a reference indicator, and the payload size of the reference indicator is related to the number of TRPs corresponding to the number of antenna groups.

14. A method performed by a user equipment (UE) in a wireless communication system, the method comprising: Receive information from the base station regarding channel state information (CSI) reports, which instruct the antenna group; The reference antenna group is determined based on the information; Determine calibration-related information (CLI) associated with the antenna group; as well as Send a CSI report to the base station, including CLI indicators that indicate the reference antenna group and CLI.

15. A method performed by a base station (BS) in a wireless communication system, the method comprising: Send information about a channel state information (CSI) report to the user equipment (UE), the information indicating the antenna group; as well as Receive a CSI report from the UE, including CLI indicators that indicate the reference antenna group and calibration-related information (CLI). The reference antenna group is based on the information, and CLI is related to the antenna group.

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