Method and apparatus for receiving and transmitting information in a wireless communication system

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The disclosure provides a method performed by a user equipment (UE) in a wireless communication system and a UE performing the method. The method includes receiving a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration indicates a resource set for channel measurement including K resources, K > 1; reporting CSI associated with MR resources of the K resources and CSI associated with M- MR resources, MR ≥ 0, wherein the M and the MR resources are indicated by the CSI reporting configuration, and the M-MR resources are from the K resources other than the MR resources, wherein in case that the reported CSI includes CSI Part 1 and CSI Part 2, and the CSI reporting configuration indicates that each of the K resources corresponds to a rank indicator (RI) restriction, CSI Part 1 associated with the m-th resource of the M-MR resources is zero-padded to a fixed pay load size by zero-padding bits, 1 ≤ m ≤ M - MR.

Description

METHOD AND APPARATUS FOR RECEIVING AND TRANSMITTING INFORMATION IN A WIRELESS COMMUNICATION SYSTEM

[0001] The present application relates to the technical field of wireless communication, and more specifically, to a method and device for receiving and transmitting information.

[0002] 5G mobile communication technologies define broad frequency bands such that high transmission rates and new services are possible, and can be implemented not only in “Sub 6GHz” bands such as 3.5GHz, but also in “Above 6GHz” bands referred to as mmWave including 28GHz and 39GHz. In addition, it has been considered to implement 6G mobile communication technologies (referred to as Beyond 5G systems) in terahertz (THz) bands (for example, 95GHz to 3THz bands) in order to accomplish transmission rates fifty times faster than 5G mobile communication technologies and ultra-low latencies one-tenth of 5G mobile communication technologies.

[0003] At the beginning of the development of 5G mobile communication technologies, in order to support services and to satisfy performance requirements in connection with enhanced Mobile BroadBand (eMBB), Ultra Reliable Low Latency Communications (URLLC), and massive Machine-Type Communications (mMTC), there has been ongoing standardization regarding beamforming and massive MIMO for mitigating radio-wave path loss and increasing radio-wave transmission distances in mmWave, supporting numerologies (for example, operating multiple subcarrier spacings) for efficiently utilizing mmWave resources and dynamic operation of slot formats, initial access technologies for supporting multi-beam transmission and broadbands, definition and operation of BWP (BandWidth Part), new channel coding methods such as a LDPC (Low Density Parity Check) code for large amount of data transmission and a polar code for highly reliable transmission of control information, L2 pre-processing, and network slicing for providing a dedicated network specialized to a specific service.

[0004] Currently, there are ongoing discussions regarding improvement and performance enhancement of initial 5G mobile communication technologies in view of services to be supported by 5G mobile communication technologies, and there has been physical layer standardization regarding technologies such as V2X (Vehicle-to-everything) for aiding driving determination by autonomous vehicles based on information regarding positions and states of vehicles transmitted by the vehicles and for enhancing user convenience, NR-U (New Radio Unlicensed) aimed at system operations conforming to various regulation-related requirements in unlicensed bands, NR UE Power Saving, Non-Terrestrial Network (NTN) which is UE-satellite direct communication for providing coverage in an area in which communication with terrestrial networks is unavailable, and positioning.

[0005] Moreover, there has been ongoing standardization in air interface architecture / protocol regarding technologies such as Industrial Internet of Things (IIoT) for supporting new services through interworking and convergence with other industries, IAB (Integrated Access and Backhaul) for providing a node for network service area expansion by supporting a wireless backhaul link and an access link in an integrated manner, mobility enhancement including conditional handover and DAPS (Dual Active Protocol Stack) handover, and two-step random access for simplifying random access procedures (2-step RACH for NR). There also has been ongoing standardization in system architecture / service regarding a 5G baseline architecture (for example, service based architecture or service based interface) for combining Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC) for receiving services based on UE positions.

[0006] As 5G mobile communication systems are commercialized, connected devices that have been exponentially increasing will be connected to communication networks, and it is accordingly expected that enhanced functions and performances of 5G mobile communication systems and integrated operations of connected devices will be necessary. To this end, new research is scheduled in connection with eXtended Reality (XR) for efficiently supporting AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality) and the like, 5G performance improvement and complexity reduction by utilizing Artificial Intelligence (AI) and Machine Learning (ML), AI service support, metaverse service support, and drone communication.

[0007] Furthermore, such development of 5G mobile communication systems will serve as a basis for developing not only new waveforms for providing coverage in terahertz bands of 6G mobile communication technologies, multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), array antennas and large-scale antennas, metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional space multiplexing technology using OAM (Orbital Angular Momentum), and RIS (Reconfigurable Intelligent Surface), but also full-duplex technology for increasing frequency efficiency of 6G mobile communication technologies and improving system networks, AI-based communication technology for implementing system optimization by utilizing satellites and AI (Artificial Intelligence) from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technology for implementing services at levels of complexity exceeding the limit of UE operation capability by utilizing ultra-high-performance communication and computing resources.

[0008] In order to meet the increasing demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or pre-5G communication systems. Therefore, 5G or pre-5G communication systems are also called “Beyond 4G networks” or “Post-LTE systems”.

[0009] In order to achieve a higher data rate, 5G communication systems are implemented in higher frequency (millimeter, mmWave) bands, e.g., 60 GHz bands. In order to reduce propagation loss of radio waves and increase a transmission distance, technologies such as beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antenna, analog beamforming and large-scale antenna are discussed in 5G communication systems.

[0010] In addition, in 5G communication systems, developments of system network improvement are underway based on advanced small cell, cloud radio access network (RAN), ultra-dense network, device-to-device (D2D) communication, wireless backhaul, mobile network, cooperative communication, coordinated multi-points (CoMP), reception-end interference cancellation, etc.

[0011] In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) as advanced coding modulation (ACM), and filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies have been developed.

[0012] Transmission from a base station to a user equipment (UE) is called downlink, and transmission from the UE to the base station is called uplink.

[0013] In order to enhance the scheduling efficiency of 5G wireless communication system, a base station needs to obtain channel state information (CSI) to schedule according to the CSI fed back by a terminal equipment. However, how to further enhance the performance of CSI reporting is a problem to be solved.

[0014] An aspect of the disclosure provides a method performed by a user equipment (UE) in a wireless communication system, the method includes receiving a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration indicates a resource set for channel measurement including K resources, reporting CSI associated with MRresources of the K resources and CSI associated with M-MRresources, wherein the M and the MRresources are indicated by the CSI reporting configuration, and the M-MRresources are from the K resources other than the MRresources, wherein in case that the reported CSI includes CSI Part 1 and CSI Part 2, and the CSI reporting configuration indicates that each of the K resources corresponds to a rank indicator (RI) restriction, CSI Part 1 associated with the m-th resource of the M-MRresources is zero-padded to a fixed payload size by zero-padding bits,

[0015] In an example, the number of zero-padding bits in CSI Part 1 associated with the m-th resource is the difference of a first number and a second number, wherein the first number is determined based on the RI restriction corresponding to each of the K-MRresources, and the second number is determined based on the RI restriction corresponding to the m-th resource.

[0016] In an example, the first number is the maximum value of sizes of K-MRRI fields determined based on the RI restriction corresponding to each of the K-MRresources, wherein the second number is the size of the RI field determined based on the RI restriction corresponding to the m-th resource.

[0017] In an example, the zero-padding bits are added after the RI field associated with the m-th resource, and / or the zero-padding bits are added before a channel quality indicator (CQI) field associated with the m-th resource.

[0018] Another aspect of the disclosure provides a method performed by a user equipment (UE) in a wireless communication system, the method includes receiving a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration indicates a resource set for channel measurement including K resources, reporting CSI associated with M resources of the K resources, where M is indicated by the CSI reporting configuration, and wherein in case that the CSI is carried by a physical uplink control channel (PUCCH) and has a wideband frequency domain granularity, and the CSI reporting configuration indicates that each of the K resources corresponds to a rank indicator (RI) restriction, CSI associated with the m-th resource of the M resources includes zero-padding bits, wherein the number of the zero-padding bits is determined based on the difference of a third number and a fourth number, wherein the third number is determined based on the sizes of CSI fields associated with each of the K resources and determined based on the corresponding RI restrictions, and the fourth number is determined based on the size of the CSI field associated with the m-th resource.

[0019] In an example, the third number is the maximum value of sizes of the CSI fields associated with each of the K resources.

[0020] In an example, the size of the CSI field associated with the k-th resource of the K resources is determined according to the size of the RI field determined based on the RI restriction corresponding to the k-th resource, and

[0021] In an example, the size of the CSI field associated with the k-th resource is the summation of the size of the RI field determined based on the RI restriction corresponding to the k-th resource and the size of the CSI field determined based on the value of the rank allowed to be reported indicated by the RI restriction corresponding to the k-th resource.

[0022] In an example, the size of the CSI field determined based on the value of the rank allowed to be reported indicated by the RI restriction corresponding to the k-th resource is the maximum value of sizes of the CSI fields determined based on the value of each rank allowed to be reported indicated by the RI restriction corresponding to the k-th resource.

[0023] In an example, the size of the CSI field corresponding to the m-th resource is the summation of the size of the RI field determined based on the RI restriction corresponding to the m-th resource and the size of the CSI field determined based on the reported rank corresponding to the m-th resource.

[0024] In an example, the number of ports in each of the K resources is greater than 1.

[0025] In an example, the zero-padding bits are added after a layer indicator (LI) field associated with the m-th resource, and / or the zero-padding bits are added before a precoding matrix indicator (PMI) field associated with the m-th resource.

[0026] In an example, the CSI field includes at least one of the RI field, the PMI field, the CQI field, and the LI field.

[0027] Another aspect of the disclosure provides a method performed by a user equipment (UE) in a wireless communication system, the method includes receiving a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration indicates a resource set for channel measurement including K resources, reporting CSI associated with MRresources of the K resources and CSI associated with M-MRresources, wherein the M and the MRresources are indicated by the CSI reporting configuration, and the M-MRresources are from the K resources other than the MRresources, wherein in case that the reported CSI includes CSI Part 1 and CSI Part 2, and the CSI reporting configuration indicates that each of the K resources corresponds to a rank indicator (RI) restriction, CSI Part 1 associated with the M-MRresources is zero-padded to a fixed payload size by zero-padding bits.

[0028] In an example, the number of the zero-padding bits in CSI Part 1 associated with the M-MRresources is the difference of a fifth number and a sixth number, wherein the fifth number is determined based on the RI restriction corresponding to each of the K-MRresources, and the sixth number is determined based on the RI restriction corresponding to the M-MRresources.

[0029] In an example, the fifth number is the summation of M-MRsizes of the RI fields of K-MRsizes of the RI fields determined based on the RI restriction corresponding to each of the K-MRresources.

[0030] In an example, the M-MRsizes of the RI fields are the M-MRsizes of the RI fields of the K-MRsizes of the RI fields with the largest value.

[0031] In an example, the sixth number is the summation of the M-MRsizes of the RI fields determined based on the RI restrictions corresponding to each of the M-MRresources.

[0032] In an example, the zero-padding bits are added at the end of CSI Part 1 associated with the M-MRresources.

[0033] Another aspect of the disclosure provides a method performed by a user equipment (UE) in a wireless communication system, the method includes receiving a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration indicates a resource set for channel measurement including K resources, reporting CSI associated with M resources of the K resources, where M is indicated by the CSI reporting configuration, and wherein in case that the CSI associated with the M resources is carried by a physical uplink control channel (PUCCH) and has a wideband frequency domain granularity, and the CSI reporting configuration indicates that each of the K resources corresponds to a rank indicator (RI) restriction, the CSI associated with the M resources includes zero-padding bits, wherein the number of the zero-padding bits is determined based on the difference between a seventh number and an eighth number, wherein the seventh number is determined based on the summation of M sizes of the CSI fields of sizes of the CSI fields associated with each of the K resources and are determined based on the corresponding RI restrictions, and the eighth number is determined based on the summation of sizes of CSI fields corresponding to the M resources.

[0034] In an example, the seventh number is the maximum value of the summation of M sizes of the CSI fields of sizes of the CSI fields associated with each of the K resources.

[0035] In an example, the size of the CSI field associated with the k-th resource of the K resources is determined based on the size of the RI field determined based on the RI restriction corresponding to the k-th resource,

[0036] In an example, the size of the CSI field associated with the k-th resource is the summation of the size of the RI field determined based on the RI restriction corresponding to the k-th resource and the size of the CSI field determined based on the value of the rank allowed to be reported indicated by the RI restriction corresponding to the k-th resource.

[0037] In an example, the size of the CSI field determined based on the value of the rank allowed to be reported indicated by the RI restriction corresponding to the k-th resource is the maximum value of the size of the CSI field determined based on the value of each rank allowed to be reported indicated by the RI restriction corresponding to the k-th resource.

[0038] In an example, the size of the CSI field corresponding to the m-th resource of the M resources is the summation of the size of the RI field determined based on the RI restriction corresponding to the m-th resource and the size of the CSI field determined based on the reported rank corresponding to the m-th resource,

[0039] In an example, the zero-padding bits are added at the end of the CSI associated with the M resources.

[0040] In an example, the CSI field includes at least one of the RI field, the precoding matrix indicator (PMI) field, the channel quality indicator (CQI) field, and the layer indicator (LI) field.

[0041] Another aspect of the disclosure provides a method performed by a base station in a wireless communication system, the method includes transmitting a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration indicates a resource set for channel measurement including K resources, receiving CSI, the CSI including CSI associated with MRresources of the K resources and CSI associated with M-MRresources, wherein the M and the MRresources are indicated by the CSI reporting configuration, and the M-MRresources are from the K resources other than the MRresources, wherein in case that the received CSI includes CSI Part 1 and CSI Part 2, and the CSI reporting configuration indicates that each of the K resources corresponds to a rank indicator (RI) restriction, CSI Part 1 associated with the m-th resource of the M-MRresources is zero-padded to a fixed payload size by zero-padding bits,

[0042] In an example, the number of zero-padding bits in CSI Part 1 associated with the m-th resource is the difference of a first number and a second number, wherein the first number is determined based on the RI restriction corresponding to each of the K-MRresources, and the second number is determined based on the RI restriction corresponding to the m-th resource.

[0043] In an example, the first number is the maximum value of sizes of K-MRRI fields determined based on the RI restrictions corresponding to each of the K-MRresources, wherein the second number is the size of the RI field determined based on the RI restriction corresponding to the m-th resource.

[0044] In an example, the zero-padding bits are added after the RI field associated with the m-th resource, and / or the zero-padding bits are added before a channel quality indicator (CQI) field associated with the m-th resource.

[0045] Another aspect of the disclosure provides a method performed by a base station in a wireless communication system, the method includes transmitting a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration indicates a resource set for channel measurement including K resources, receiving CSI, wherein the CSI includes CSI associated with M resources of the K resources, M is indicated by the CSI reporting configuration, and wherein in case that the CSI is carried by a physical uplink control channel (PUCCH) and has a wideband frequency domain granularity, and the CSI reporting configuration indicates that each of the K resources corresponds to a rank indicator (RI) restriction, CSI associated with the m-th resource of the M resources includes zero-padding bits, wherein the number of the zero-padding bits is determined based on the difference of a third number and a fourth number, wherein the third number is determined based on the sizes of the CSI fields associated with each of the K resources and determined based on the corresponding RI restrictions, and the fourth number is determined based on the size of the CSI field associated with the m-th resource.

[0046] In an example, the third number is the maximum value of sizes of the CSI fields associated with each of the K resources.

[0047] In an example, the size of the CSI field associated with the k-th resource of the K resources is determined according to the size of the RI field determined based on the RI restriction corresponding to the k-th resource, and

[0048] In an example, the size of the CSI field associated with the k-th resource is the summation of the size of the RI field determined based on the RI restriction corresponding to the k-th resource and the size of the CSI field determined based on the value of the rank allowed to be reported indicated by the RI restriction corresponding to the k-th resource.

[0049] In an example, the size of the CSI field determined based on the value of the rank allowed to be reported indicated by the RI restriction corresponding to the k-th resource is the maximum value of sizes of the CSI fields determined based on the value of each rank allowed to be reported indicated by the RI restriction corresponding to the k-th resource.

[0050] In an example, the size of the CSI field corresponding to the m-th resource is the summation of the size of the RI field determined based on the RI restriction corresponding to the m-th resource and the size of the CSI field determined based on the reported rank corresponding to the m-th resource.

[0051] In an example, the number of ports in each of the K resources is greater than 1.

[0052] In an example, the zero-padding bits are added after a layer indicator (LI) field associated with the m-th resource, and / or the zero-padding bits are added before a precoding matrix indicator (PMI) field associated with the m-th resource.

[0053] In an example, the CSI field includes at least one of the RI field, the PMI field, the CQI field, and the LI field.

[0054] Another aspect of the disclosure provides a method performed by a base station in a wireless communication system, the method includes transmitting a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration indicates a resource set for channel measurement including K resources, receiving CSI, the CSI includes CSI associated with MRresources of the K resources and CSI associated with M-MRresources, wherein the M and the MRresources are indicated by the CSI reporting configuration, and the M-MRresources are from the K resources other than the MRresources, wherein in case that the received CSI includes CSI Part 1 and CSI Part 2, and the CSI reporting configuration indicates that each of the K resources corresponds to a rank indicator (RI) restriction, CSI Part 1 associated with the M-MRresources is zero-padded to a fixed payload size by zero-padding bits.

[0055] In an example, the number of the zero-padding bits in CSI Part 1 associated with the M-MRresources is the difference of a fifth number and a sixth number, wherein the fifth number is determined based on the RI restriction corresponding to each of the K-MRresources, and the sixth number is determined based on the RI restriction corresponding to the M-MRresources.

[0056] In an example, the fifth number is the summation of M-MRsizes of the RI fields of K-MRsizes of the RI fields determined based on the RI restriction corresponding to each of the K-MRresources.

[0057] In an example, the M-MRsizes of the RI fields are the M-MRsizes of the RI fields of the K-MRsizes of the RI fields with the largest value.

[0058] In an example, the sixth number is the summation of the M-MRsizes of the RI fields determined based on the RI restrictions corresponding to each of the M-MRresources.

[0059] In an example, the zero-padding bits are added at the end of CSI Part 1 associated with the M-MRresources.

[0060] Another aspect of the disclosure provides a method performed by a base station in a wireless communication system, the method includes transmitting a channel state information (CSI) reporting configuration, wherein the CSI reporting configuration indicates a resource set for channel measurement including K resources, receiving CSI, wherein the CSI includes CSI associated with M resources of the K resources, where M is indicated by the CSI reporting configuration, and wherein in case that the CSI associated with the M resources is carried by a physical uplink control channel (PUCCH) and has a wideband frequency domain granularity, and the CSI reporting configuration indicates that each of the K resources corresponds to a rank indicator (RI) restriction, the CSI associated with the M resources includes zero-padding bits, wherein the number of the zero-padding bits is determined based on the difference of a seventh number and an eighth number, wherein the seventh number is determined based on the summation of M sizes of the CSI fields of sizes of the CSI fields associated with each of the K resources and are determined based on the corresponding RI restrictions, and the eighth number is determined based on the summation of sizes of CSI fields corresponding to the M resources.

[0061] In an example, the seventh number is the maximum value of the summation of M sizes of the CSI fields of sizes of the CSI fields associated with each of the K resources.

[0062] In an example, the size of the CSI field associated with the k-th resource of the K resources is determined based on the size of the RI field determined based on the RI restriction corresponding to the k-th resource,

[0063] In an example, the size of the CSI field associated with the k-th resource is the summation of the size of the RI field determined based on the RI restriction corresponding to the k-th resource and the size of the CSI field determined based on the value of the rank allowed to be reported indicated by the RI restriction corresponding to the k-th resource.

[0064] In an example, the size of the CSI field determined based on the value of the rank allowed to be reported indicated by the RI restriction corresponding to the k-th resource is the maximum value of the size of the CSI field determined based on the value of each rank allowed to be reported indicated by the RI restriction corresponding to the k-th resource.

[0065] In an example, the size of the CSI field corresponding to the m-th resource of the M resources is the summation of the size of the RI field determined based on the RI restriction corresponding to the m-th resource and the size of the CSI field determined based on the reported rank corresponding to the m-th resource,

[0066] In an example, the zero-padding bits are added at the end of the CSI associated with the M resources.

[0067] In an example, the CSI field includes at least one of the RI field, the precoding matrix indicator (PMI) field, the channel quality indicator (CQI) field, and the layer indicator (LI) field.

[0068] The method provided in the application improve the performance of CSI, improving the scheduling efficiency of the communication system.

[0069] Aspects of the present disclosure provide efficient communication methods in a wireless communication system.

[0070] The above and other aspects, features, and advantages of the disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0071] FIG. 1 illustrates an overall structure of an example wireless communication network according to various embodiments of the disclosure;

[0072] FIGs. 2a and 2b respectively illustrate a transmission path 200 and a reception path 250 in a wireless communication network according to various embodiments of the disclosure;

[0073] FIGs. 3a and 3b respectively illustrate structures of a user equipment (UE) and a base station in a wireless communication network according to various embodiments of the disclosure;

[0074] FIG. 4 illustrates a method 400 performed by a user equipment (UE) according to various embodiments of the disclosure;

[0075] FIG. 5 illustrates a method 500 performed by a base station according to various embodiments of the disclosure;

[0076] FIG. 6 illustrates a structure 600 of a user equipment according to various embodiments of the disclosure;

[0077] FIG. 7 illustrates a structure 700 of a base station according to various embodiments of the disclosure;

[0078] FIG. 8 is a block diagram of a terminal or user equipment (UE) according to an embodiment of the disclosure;

[0079] FIG. 9 is a block diagram of a base station (BS) according to an embodiment of the disclosure; and.

[0080] FIG. 10 is a block diagram of a network entity according to an embodiment of the disclosure.

[0081] Hereinafter, embodiments of the disclosure will be described in detail with reference to the accompanying drawings.

[0082] In describing the embodiments, descriptions related to technical contents well-known in the art and not associated directly with the disclosure will be omitted. Such an omission of unnecessary descriptions is intended to prevent obscuring of the main idea of the disclosure and more clearly transfer the main idea.

[0083] For the same reason, in the accompanying drawings, some elements may be exaggerated, omitted, or schematically illustrated. Further, the size of each element does not completely reflect the actual size. In the drawings, identical or corresponding elements are provided with identical reference numerals or different reference numerals.

[0084] The advantages and features of the disclosure and ways to achieve them will be apparent by making reference to embodiments as described below in detail in conjunction with the accompanying drawings. However, the disclosure is not limited to the embodiments set forth below, but may be implemented in various different forms. The following embodiments are provided only to completely disclose the disclosure and inform those skilled in the art of the scope of the disclosure, and the disclosure is defined only by the scope of the appended claims. Throughout the specification, the same or like reference numerals designate the same or like elements. Furthermore, in describing the disclosure, a detailed description of known functions or constitution incorporated herein will be omitted in the case that it is determined that the description may make the subject matter of the disclosure unnecessarily unclear. The terms which will be described below are terms defined in consideration of the functions in the disclosure, and may be different according to users, intentions of the operators, or customs. Therefore, the definitions of the terms should be made based on the contents throughout the specification.

[0085] Herein, it will be understood that each block of the flowchart illustrations, and combinations of blocks in the flowchart illustrations, may be performed based on computer program instructions. These computer program instructions may be loaded collectively onto at least one processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which perform through any one of, or in any combination of, the at least one processor of the computer or other programmable data processing apparatus, create means for performing the functions specified in the flowchart block(s). These computer program instructions may also be stored in a non-transitory computer usable or computer-readable memory that may direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer usable or computer-readable memory produce an article of manufacture including instruction means that perform the function specified in the flowchart block(s). The computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable data processing apparatus to produce a computer executed process such that the instructions that perform on the computer or other programmable data processing apparatus provide steps for executing the functions specified in the flowchart block(s).

[0086] Further, each block may represent a module, segment, or portion of code, which includes one or more executable instructions for executing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks may occur out of the order. For example, two blocks(or functions) shown in succession may in fact be performed substantially concurrently or the blocks may sometimes be performed in the reverse order, depending upon the functionality involved.

[0087] As used in embodiments of the disclosure, a “~unit” may refer to a software element or a hardware element, such as a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC), which performs a predetermined function. However, the term including the word “~unit” does not always have a meaning limited to software or hardware. The “~unit” may be constructed either to be stored in an addressable storage medium or to execute one or more processors. Therefore, the “~unit” includes, for example, software elements, object-oriented software elements, components such as class elements and task elements, processes, functions, properties, procedures, sub-routines, segments of a program code, drivers, firmware, micro-codes, circuits, data, database, data structures, tables, arrays, and parameters. The components and functions provided by the “~unit” may be either combined into a smaller number of components and a “~unit,” or divided into additional components and a “~unit.” Moreover, the components and “~units” may be implemented to reproduce one or more central processing units (CPUs) within a device or a security multimedia card. Further, in the embodiments, the “~unit” may include one or more processors.

[0088] It should be appreciated that the blocks in each flowchart and combinations of the flowcharts may be performed by one or more computer programs which include instructions. The entirety of the one or more computer programs may be stored in a single memory device or the one or more computer programs may be divided with different portions stored in different multiple memory devices.

[0089] Any of the functions or operations described herein can be processed by one processor or a combination of processors. The one processor or the combination of processors is circuitry performing processing and includes circuitry like an application processor (AP, e.g. a CPU), a communication processor (CP, e.g., a modem), a graphics processing unit (GPU), a neural processing unit (NPU) (e.g., an artificial intelligence (AI) chip), a Wi-Fi chip, a Bluetooth® chip, a global positioning system (GPS) chip, a near field communication (NFC) chip, connectivity chips, a sensor controller, a touch controller, a finger-print sensor controller, a display driver integrated circuit (IC), an audio CODEC chip, a universal serial bus (USB) controller, a camera controller, an image processing IC, a microprocessor unit (MPU), a system on chip (SoC), an IC, or the like.

[0090] It will be appreciated that various embodiments of the disclosure according to the claims and description in the specification can be realized in the form of hardware, software or a combination of hardware and software.

[0091] Any such software may be stored in non-transitory computer readable storage media. The non-transitory computer readable storage media store one or more computer programs (software modules), the one or more computer programs include computer-executable instructions that, when executed by one or more processors of an electronic device individually or collectively, cause the electronic device to perform a method of the disclosure.

[0092] Any such software may be stored in the form of volatile or non-volatile storage such as, for example, a storage device like read only memory (ROM), whether erasable or rewritable or not, or in the form of memory such as, for example, random access memory (RAM), memory chips, device or integrated circuits or on an optically or magnetically readable medium such as, for example, a compact disk (CD), digital versatile disc (DVD), magnetic disk or magnetic tape or the like. It will be appreciated that the storage devices and storage media are various embodiments of non-transitory machine-readable storage that are suitable for storing a computer program or computer programs comprising instructions that, when executed, implement various embodiments of the disclosure. Accordingly, various embodiments of the present disclosure may provide a program comprising code for implementing apparatus or a method as claimed in any one of the claims of this specification and a non-transitory machine-readable storage storing such a program.

[0093] Hereinafter, the determination of priority between A and B in the present disclosure may refer to various actions such as selecting the one having a higher priority based on a predefined priority rule and performing an operation corresponding thereto, or omitting or dropping an operation corresponding to the one having a lower priority.

[0094] Hereinafter, "A or B" as described in the present disclosure may be understood as "A and / or B," which may include A, or B, or both A and B.

[0095] In addition, "at least one of A, B, and C" as described in the present disclosure may be understood to include A, or B, or C, or any combination of A, B, and C.

[0096] In addition, "at least one of A, B, or C" as described in the present disclosure may be understood to include A, or B, or C, or any combination of A, B, and C.

[0097] Furthermore, "A / B" as described in the present disclosure may be understood as "A and / or B," which may include A, or B, or both A and B.

[0098] Furthermore, "A, B" as described in the present disclosure may be understood as "A and / or B," which may include A, or B, or both A and B.

[0099] Furthermore, "A and B" as described in the present disclosure may be understood as "A and / or B," which may include A, or B, or both A and B.

[0100] Furthermore, “if condition A and condition B are satisfied,” as described in the present disclosure, may not be limited to a case where both condition A and condition B are satisfied, but may be understood to include a case where either condition A or condition B is individually satisfied, both condition A and condition B are satisfied, or one or more additional conditions are satisfied in combination.

[0101] Furthermore, throughout this disclosure, ordinal terms such as "first," "second," "third," etc., (and similar qualifiers) are used merely to distinguish between different instances, occurrences, configurations, messages, stages, or aspects of elements, operations, or information as described herein. Unless the context clearly dictates otherwise, the use of such ordinal terms does not itself require that the elements, operations, or information distinguished by these terms be structurally different, numerically distinct, or substantively dissimilar. For example, a "first signal" and a "second signal" may refer to instances of the same signal transmitted at different times or containing the same core information despite minor variations, or they may refer to signals with different content or characteristics, depending on the specific context. Similarly, a "first value" and a "second value" may represent the same magnitude but measured or applied in different circumstances, or they may represent different magnitudes. The interpretation should be guided by the specific technical context, function, and relationship described in the relevant portion of the specification and claims.

[0102] Furthermore, the terms “first ~”, “second ~”, etc., as described in the present disclosure with respect to various elements (e.g., information, objects, operation, sequences, or the like), should not limit those elements. These terms may only be intended to distinguish one element from another, and may not be intended to indicate a specific order. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element.

[0103] Furthermore, even if “first ~” and “second ~” are described in the present disclosure, it may be understood that element(s) referred to by “first ~” and “second ~” may be the same or different. For example, in case of element(s) being information, first information and second information may both be same information and, in some cases, are separate and different information.

[0104] In addition, the terms “if ~” and “in case that ~” as used in the disclosure or claims may be interpreted to include the meanings of “when (or upon) ~,” “in response to ~,” “based on ~,” or “according to ~,” and may be used interchangeably with these expressions. In addition, expressions other than those exemplified herein may also be used, as long as they have substantially the same meaning and do not impair the technical features of the present disclosure.

[0105] For example, the physical layer signaling may be referred to as Layer 1 (L1) signaling and may include downlink control information (DCI). In addition, the higher layer signaling may include a medium access control (MAC) control message, a radio resource control (RRC) signaling message, a non-access stratum (NAS) signaling message, or an application layer message. The RRC signaling message may be referred to as L3 (layer 3) signaling. It should be noted, however, that the higher layer signaling is not limited to the aforementioned examples.

[0106] In addition, the term "not perform" as used in the present disclosure or claims may, in context, be understood to mean that the corresponding step is omitted or skipped. Such a term may be replaced with other terms having the same or substantially equivalent meaning.

[0107] In addition, "transmitting a message including A and B" as described in the present disclosure, may be understood as encompassing both (i) transmitting A and B in a single message, and (ii) transmitting A and B separately via multiple messages (e.g., transmitting a first message including A and a second message including B). This interpretation may also apply to messages that include two or more items (e.g., A, B, C), transmitted either together or separately.

[0108] In addition, "transmitting a message including A and transmitting a message including B" may also be interpreted as transmitting a message including A and B in a single message.

[0109] In the specific embodiments of the present disclosure described below, terms or components included in the disclosure may be expressed in singular or plural form depending on the specific embodiments presented. However, such singular or plural expressions are selected appropriately for convenience of description, and the present disclosure is not limited to a singular or plural number of components. A component expressed in the plural form may be implemented as a single component, and a component expressed in the singular form may be implemented as multiple components.

[0110] The drawings or flowcharts described below illustrate exemplary methods that may be implemented according to the principles of the present disclosure, and various modifications may be made to the methods illustrated in the flowcharts of the present disclosure. For example, although illustrated as a series of steps, various steps in each drawing or flowchart may overlap, occur in parallel, occur in a different order, or be repeated. In other examples, any step may be omitted or replaced with another step.

[0111] The methods and apparatuses proposed in the embodiments of the present disclosure are not limited to each embodiment individually, but may also be applied in combination of all or some of the embodiments proposed in the disclosure. Therefore, the embodiments of the present disclosure may be modified and applied without significantly departing from the scope of the present disclosure, as would be understood by those skilled in the art.

[0112] In this case, even if certain wordings are described differently across embodiments, they may be used interchangeably or in substitution or in combination if their underlying concepts are equivalent. For example, for the same or equivalent concept, even if one embodiment uses the expression "A" and another embodiment uses the expression "B", such expressions may be understood interchangeably, in substitution, or in combination.

[0113] The terms used in the following description to refer to access nodes, network entities, messages, interfaces between network entities, various types of identification information, and the like, are provided merely for the convenience of explanation by way of example. Therefore, the present disclosure is not limited to the terms described below, and other terms having equivalent technical meanings may also be used. Such terms may also be interchangeable with terms defined in any 3rd generation partnership project　(3GPP) technical specifications (TS) where appropriate.

[0114] Hereinafter, a base station is an entity that allocates resources to terminals, and may be at least one of a gNode B, an eNode B, a Node B, a base station (BS), a wireless access unit, a BS controller, or a node on a network.

[0115] Furthermore, the base station of the present disclosure may include a split architecture comprising a central unit (CU) and a distributed unit (DU). In this structure, the CU is configured to process the higher layers of the control and user planes, while the DU is configured to process lower-layer radio resource functions. The embodiments of the present disclosure may be equally applicable to 5G base station architectures in which such CU and DU functional splits are implemented.

[0116] A terminal may include a UE, a mobile station (MS), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing communication functions.

[0117] In the disclosure, a downlink (DL) refers to a radio link through which a BS transmits a signal to a UE, and an uplink (UL) refers to a radio link through which a UE transmits a signal to a BS.

[0118] Furthermore, hereinafter, 5th generation (5G) mobile communication technologies (e.g., 5G new radio (NR)), 6th generation (6G) mobile communication technologies may be described by way of example, but the embodiments of the present disclosure may also be applied to other communication systems having similar technical backgrounds or channel types. For example, newly evolved mobile communication systems developed after 5G and 6G may be included. Furthermore, based on determinations by those skilled in the art, the embodiments of the present disclosure may also be applied to other communication systems (e.g., Wi-Fi systems) through some modifications without significantly departing from the scope of the present disclosure

[0119] In the following description, the terms physical channel and signal may be used interchangeably with data or control signal. For example, the term physical downlink shared channel (PDSCH) refers to a physical channel through which data is transmitted, but the term PDSCH may also be used to refer to the data itself. That is, in the present disclosure, the expression "transmit a physical channel" may be interpreted as being equivalent to the expression "transmit data or a signal via a physical channel."

[0120] Hereinafter, in the context of the present disclosure, higher layer signaling may refer to signaling corresponding to at least one or any combination of the following: master information block (MIB), system information block (SIB) or SIB M (M = 1, 2, ...), radio resource control (RRC), or medium access control (MAC) control element (CE), or a non-access stratum (NAS) signaling message, or an application layer message. The RRC signaling message may be referred to as L3 (layer 3) signaling.

[0121] In addition, L1 signaling may refer to signaling corresponding to at least one or any combination of signaling techniques using the at least one or any combination of the following physical layer channels or signaling: physical downlink control channel (PDCCH), downlink control information (DCI), user equipment (UE)-specific DCI, group-common DCI, common DCI, scheduling DCI (e.g., DCI used for scheduling downlink or uplink data), non-scheduling DCI (e.g., DCI not used for scheduling downlink or uplink data) physical uplink control channel (PUCCH), or uplink control information (UCI). The L1 signaling message may be referred to as a physical layer signaling.

[0122] Hereinafter, the expression that information is configured by the BS, as used in the present disclosure or claims, may, in context, be understood to mean that the terminal receives the corresponding information from the BS via a physical layer signaling or a higher layer signaling. Such an expression may be replaced with other terms having the same or substantially equivalent meaning.

[0123] Hereinafter, the operational principle of the present disclosure will be described in detail with reference to the accompanying drawings.

[0124] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the disclosure as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the disclosure. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

[0125] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the disclosure is provided for illustration purpose only and not for the purpose of limiting the disclosure as defined by the appended claims and their equivalents.

[0126] It is to be understood that the singular forms “a”, “an” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a component surface” includes reference to one or more of such surfaces.

[0127] The term “include” or “may include” refers to the existence of a corresponding disclosed function, operation or component which can be used in various embodiments of the disclosure and does not limit one or more additional functions, operations, or components. The terms such as “include” and / or “have” may be construed to denote a certain characteristic, number, step, operation, constituent element, component or a combination thereof, but may not be construed to exclude the existence of or a possibility of addition of one or more other characteristics, numbers, steps, operations, constituent elements, components or combinations thereof.

[0128] The term “or” used in various embodiments of the disclosure includes any or all of combinations of listed words. For example, the expression “A or B” may include A, may include B, or may include both A and B.

[0129] Unless defined differently, all terms used herein, which include technical terminologies or scientific terminologies, have the same meaning as that understood by a person skilled in the art to which the disclosure belongs. Such terms as those defined in a generally used dictionary are to be interpreted to have the meanings equal to the contextual meanings in the relevant field of art, and are not to be interpreted to have ideal or excessively formal meanings unless clearly defined in the disclosure.

[0130] The various embodiments of the disclosure can be applied to various communication systems, such as: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, broadband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system Frequency division duplex (FDD) systems, time division duplex (TDD) systems, universal mobile telecommunications systems (UMTS), global interoperability for microwave access (WiMAX) communication systems, fifth generation (5G) systems or new wireless (NR) systems, etc. In addition, the various embodiments of the disclosure can be applied to future oriented communication technologies.

[0131] FIG. 1 illustrates an example wireless networK100 according to various embodiments of the disclosure. The embodiment of the wireless networK100 shown in FIG. 1 is for illustration only. Other embodiments of the wireless networK100 can be used without departing from the scope of the disclosure.

[0132] The wireless networK100 includes a gNodeB (gNB) 101, a gNB 102, and a gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one Internet Protocol (IP) networK130, such as the Internet, a private IP network, or other data networks.

[0133] Depending on a type of the network, other well-known terms such as “base station” or “access point” can be used instead of “gNodeB” or “gNB”. For convenience, the terms “gNodeB” and “gNB” are used in this patent document to refer to network infrastructure components that provide wireless access for remote terminals. And, depending on the type of the network, other well-known terms such as “mobile station”, “user station”, “remote terminal”, “wireless terminal” or “user apparatus” can be used instead of “user equipment” or “UE”. For convenience, the terms “user equipment” and “UE” are used in this patent document to refer to remote wireless devices that wirelessly access the gNB, no matter whether the UE is a mobile device (such as a mobile phone or a smart phone) or a fixed device (such as a desktop computer or a vending machine).

[0134] gNB 102 provides wireless broadband access to the networK130 for a first plurality of User Equipments (UEs) within a coverage area 120 of gNB 102. The first plurality of UEs include a UE 111, which may be located in a Small Business (SB); a UE 112, which may be located in an enterprise (E); a UE 113, which may be located in a WiFi Hotspot (HS); a UE 114, which may be located in a first residence (R); a UE 115, which may be located in a second residence (R); a UE 116, which may be a mobile device (M), such as a cellular phone, a wireless laptop computer, a wireless PDA, etc. GNB 103 provides wireless broadband access to networK130 for a second plurality of UEs within a coverage area 125 of gNB 103. The second plurality of UEs include a UE 115 and a UE 116. In some embodiments, one or more of gNBs 101-103 can communicate with each other and with UEs 111-116 using 5G, Long Term Evolution (LTE), LTE-A, WiMAX or other advanced wireless communication technologies.

[0135] The dashed lines show approximate ranges of the coverage areas 120 and 125, and the ranges are shown as approximate circles merely for illustration and explanation purposes. It should be clearly understood that the coverage areas associated with the gNBs, such as the coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on configurations of the gNBs and changes in the radio environment associated with natural obstacles and man-made obstacles.

[0136] As will be described in more detail below, one or more of gNB 101, gNB 102, and gNB 103 include a 2D antenna array as described in embodiments of the disclosure. In some embodiments, one or more of gNB 101, gNB 102, and gNB 103 support codebook designs and structures for systems with 2D antenna arrays.

[0137] Although FIG. 1 illustrates an example of the wireless networK100, various changes can be made to FIG. 1. The wireless networK100 can include any number of gNBs and any number of UEs in any suitable arrangement, for example. Furthermore, gNB 101 can directly communicate with any number of UEs and provide wireless broadband access to the networK130 for those UEs. Similarly, each gNB 102-103 can directly communicate with the networK130 and provide direct wireless broadband access to the networK130 for the UEs. In addition, gNB 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.

[0138] FIGs. 2a and 2b illustrate example wireless transmission and reception paths according to the disclosure. In the following description, the transmission path 200 can be described as being implemented in a gNB, such as gNB 102, and the reception path 250 can be described as being implemented in a UE, such as UE 116. However, it should be understood that the reception path 250 can be implemented in a gNB and the transmission path 200 can be implemented in a UE. In some embodiments, the reception path 250 is configured to support codebook designs and structures for systems with 2D antenna arrays as described in embodiments of the disclosure.

[0139] The transmission path 200 includes a channel coding and modulation blocK205, a Serial-to-Parallel (S-to-P) blocK210, a size N Inverse Fast Fourier Transform (IFFT) blocK215, a Parallel-to-Serial (P-to-S) blocK220, a cyclic prefix addition blocK225, and an up-converter (UC) 230. The reception path 250 includes a down-converter (DC) 255, a cyclic prefix removal blocK260, a Serial-to-Parallel (S-to-P) blocK265, a size N Fast Fourier Transform (FFT) blocK270, a Parallel-to-Serial (P-to-S) blocK275, and a channel decoding and demodulation blocK280.

[0140] In the transmission path 200, the channel coding and modulation blocK205 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. The Serial-to-Parallel (S-to-P) blocK210 converts (such as demultiplexes) serial modulated symbols into parallel data to generate N parallel symbol streams, where N is a size of the IFFT / FFT used in gNB 102 and UE 116. The size N IFFT blocK215 performs IFFT operations on the N parallel symbol streams to generate a time domain output signal. The Parallel-to-Serial blocK220 converts (such as multiplexes) parallel time domain output symbols from the Size N IFFT blocK215 to generate a serial time domain signal. The cyclic prefix addition blocK225 inserts a cyclic prefix into the time domain signal. The up-converter 230 modulates (such as up-converts) the output of the cyclic prefix addition blocK225 to an RF frequency for transmission via a wireless channel. The signal can also be filtered at a baseband before switching to the RF frequency.

[0141] The RF signal transmitted from gNB 102 arrives at UE 116 after passing through the wireless channel, and operations in reverse to those at gNB 102 are performed at UE 116. The down-converter 255 down-converts the received signal to a baseband frequency, and the cyclic prefix removal blocK260 removes the cyclic prefix to generate a serial time domain baseband signal. The Serial-to-Parallel blocK265 converts the time domain baseband signal into a parallel time domain signal. The Size N FFT blocK270 performs an FFT algorithm to generate N parallel frequency domain signals. The Parallel-to-Serial blocK275 converts the parallel frequency domain signal into a sequence of modulated data symbols. The channel decoding and demodulation blocK280 demodulates and decodes the modulated symbols to recover the original input data stream.

[0142] Each of gNBs 101-103 may implement a transmission path 200 similar to that for transmitting to UEs 111-116 in the downlink, and may implement a reception path 250 similar to that for receiving from UEs 111-116 in the uplink. Similarly, each of UEs 111-116 may implement a transmission path 200 for transmitting to gNBs 101-103 in the uplink, and may implement a reception path 250 for receiving from gNBs 101-103 in the downlink.

[0143] Each of the components in FIGs. 2a and 2b can be implemented using only hardware, or using a combination of hardware and software / firmware. As a specific example, at least some of the components in FIGs. 2a and 2b may be implemented in software, while other components may be implemented in configurable hardware or a combination of software and configurable hardware. For example, the FFT blocK270 and IFFT blocK215 may be implemented as configurable software algorithms, in which the value of the size N may be modified according to the implementation.

[0144] Furthermore, although described as using FFT and IFFT, this is only illustrative and should not be interpreted as limiting the scope of the disclosure. Other types of transforms can be used, such as Discrete Fourier transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions. It should be understood that for DFT and IDFT functions, the value of variable N may be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N may be any integer which is a power of 2 (such as 1, 2, 4, 8, 16, etc.)

[0145] Although FIGs. 2a and 2b illustrate examples of wireless transmission and reception paths, various changes may be made to FIGs. 2a and 2b. For example, various components in FIGs. 2a and 2b can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. Furthermore, FIGs. 2a and 2b are intended to illustrate examples of types of transmission and reception paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communication in a wireless network.

[0146] FIG. 3a illustrates an example UE 116 according to the disclosure. The embodiment of UE 116 shown in FIG. 3a is for illustration only, and UEs 111-115 of FIG. 1 can have the same or similar configuration. However, a UE has various configurations, and FIG. 3a does not limit the scope of the disclosure to any specific implementation of the UE.

[0147] UE 116 includes an antenna 301, a radio frequency (RF) transceiver 302, a transmission (TX) processing circuit 303, a microphone 304, and a reception (RX) processing circuit 305. UE 116 also includes a speaker 306, a controller / processor 307, an input / output (I / O) interface 308, an input device(s) 309, a display 310, and a memory 311. The memory 311 includes an operating system (OS) 312 and one or more applications 313.

[0148] The RF transceiver 302 receives an incoming RF signal transmitted by a gNB of the wireless networK100 from the antenna 301. The RF transceiver 302 down-converts the incoming RF signal to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is transmitted to the RX processing circuit 305, where the RX processing circuit 305 generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. The RX processing circuit 305 transmits the processed baseband signal to speaker 306 (such as for voice data) or to controller / processor 307 for further processing (such as for web browsing data).

[0149] The TX processing circuit 303 receives analog or digital voice data from microphone 304 or other outgoing baseband data (such as network data, email or interactive video game data) from controller / processor 307. The TX processing circuit 303 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 302 receives the outgoing processed baseband or IF signal from the TX processing circuit 303 and up-converts the baseband or IF signal into an RF signal transmitted via the antenna 301.

[0150] The controller / processor 307 can include one or more processors or other processing devices and execute an OS 312 stored in the memory 311 in order to control the overall operation of UE 116. For example, the controller / processor 307 can control the reception of forward channel signals and the transmission of backward channel signals through the RF transceiver 302, the RX processing circuit 305 and the TX processing circuit 303 according to well-known principles. In some embodiments, the controller / processor 307 includes at least one microprocessor or microcontroller.

[0151] The controller / processor 307 is also capable of executing other processes and programs residing in the memory 311, such as operations for channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the disclosure. The controller / processor 307 can move data into or out of the memory 311 as required by an execution process. In some embodiments, the controller / processor 307 is configured to execute the application 313 based on the OS 312 or in response to signals received from the gNB or the operator. The controller / processor 307 is also coupled to an I / O interface 308, where the I / O interface 308 provides UE 116 with the ability to connect to other devices such as laptop computers and handheld computers. I / O interface 308 is a communication path between these accessories and the controller / processor 307.

[0152] The controller / processor 307 is also coupled to the input device(s) 309 and the display 310. An operator of UE 116 can input data into UE 116 using the input device(s) 309. The display 310 may be a liquid crystal display or other display capable of presenting text and / or at least limited graphics (such as from a website). The memory 311 is coupled to the controller / processor 307. A part of the memory 311 can include a random access memory (RAM), while another part of the memory 311 can include a flash memory or other read-only memory (ROM).

[0153] Although FIG. 3a illustrates an example of UE 116, various changes can be made to FIG. 3a. For example, various components in FIG. 3a can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. As a specific example, the controller / processor 307 can be divided into a plurality of processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Furthermore, although FIG. 3a illustrates that the UE 116 is configured as a mobile phone or a smart phone, UEs can be configured to operate as other types of mobile or fixed devices.

[0154] FIG. 3b illustrates an example gNB 102 according to the disclosure. The embodiment of gNB 102 shown in FIG. 3b is for illustration only, and other gNBs of FIG. 1 can have the same or similar configuration. However, a gNB has various configurations, and FIG. 3b does not limit the scope of the disclosure to any specific implementation of a gNB. It should be noted that gNB 101 and gNB 103 can include the same or similar structures as gNB 102.

[0155] As shown in FIG. 3b, gNB 102 includes a plurality of antennas 370a-370n, a plurality of RF transceivers 372a-372n, a transmission (TX) processing circuit 374, and a reception (RX) processing circuit 376. In certain embodiments, one or more of the plurality of antennas 370a-370n include a 2D antenna array. gNB 102 also includes a controller / processor 378, a memory 380, and a backhaul or network interface 382.

[0156] RF transceivers 372a-372n receive an incoming RF signal from antennas 370a-370n, such as a signal transmitted by UEs or other gNBs. RF transceivers 372a-372n down-convert the incoming RF signal to generate an IF or baseband signal. The IF or baseband signal is transmitted to the RX processing circuit 376, where the RX processing circuit 376 generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. RX processing circuit 376 transmits the processed baseband signal to controller / processor 378 for further processing.

[0157] The TX processing circuit 374 receives analog or digital data (such as voice data, network data, email or interactive video game data) from the controller / processor 378. TX processing circuit 374 encodes, multiplexes and / or digitizes outgoing baseband data to generate a processed baseband or IF signal. RF transceivers 372a-372n receive the outgoing processed baseband or IF signal from TX processing circuit 374 and up-convert the baseband or IF signal into an RF signal transmitted via antennas 370a-370n.

[0158] The controller / processor 378 can include one or more processors or other processing devices that control the overall operation of gNB 102. For example, the controller / processor 378 can control the reception of forward channel signals and the transmission of backward channel signals through the RF transceivers 372a-372n, the RX processing circuit 376 and the TX processing circuit 374 according to well-known principles. The controller / processor 378 can also support additional functions, such as higher layer wireless communication functions. For example, the controller / processor 378 can perform a Blind Interference Sensing (BIS) process such as that performed through a BIS algorithm, and decode a received signal from which an interference signal is subtracted. A controller / processor 378 may support any of a variety of other functions in gNB 102. In some embodiments, the controller / processor 378 includes at least one microprocessor or microcontroller.

[0159] The controller / processor 378 is also capable of executing programs and other processes residing in the memory 380, such as a basic OS. The controller / processor 378 can also support channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the disclosure. In some embodiments, the controller / processor 378 supports communication between entities such as web RTCs. The controller / processor 378 can move data into or out of the memory 380 as required by an execution process.

[0160] The controller / processor 378 is also coupled to the backhaul or network interface 382. The backhaul or network interface 382 allows gNB 102 to communicate with other devices or systems through a backhaul connection or through a network. The backhaul or network interface 382 can support communication over any suitable wired or wireless connection(s). For example, when gNB 102 is implemented as a part of a cellular communication system, such as a cellular communication system supporting 5G or new radio access technology or NR, LTE or LTE-A, the backhaul or network interface 382 can allow gNB 102 to communicate with other gNBs through wired or wireless backhaul connections. When gNB 102 is implemented as an access point, the backhaul or network interface 382 can allow gNB 102 to communicate with a larger network, such as the Internet, through a wired or wireless local area network or through a wired or wireless connection. The backhaul or network interface 382 includes any suitable structure that supports communication through a wired or wireless connection, such as an Ethernet or an RF transceiver.

[0161] The memory 380 is coupled to the controller / processor 378. A part of the memory 380 can include an RAM, while another part of the memory 380 can include a flash memory or other ROMs. In certain embodiments, a plurality of instructions, such as the BIS algorithm, are stored in the memory. The plurality of instructions are configured to cause the controller / processor 378 to execute the BIS process and decode the received signal after subtracting at least one interference signal determined by the BIS algorithm.

[0162] As will be described in more detail below, the transmission and reception paths of gNB 102 (implemented using RF transceivers 372a-372n, TX processing circuit 374 and / or RX processing circuit 376) support aggregated communication with FDD cells and TDD cells.

[0163] Although FIG. 3b illustrates an example of gNB 102, various changes may be made to FIG. 3b. For example, gNB 102 can include any number of each component shown in FIG. 3a. As a specific example, the access point can include many backhaul or network interfaces 382, and the controller / processor 378 can support routing functions to route data between different network addresses. As another specific example, although shown as including a single instance of the TX processing circuit 374 and a single instance of the RX processing circuit 376, gNB 102 can include multiple instances of each (such as one for each RF transceiver).

[0164] Exemplary embodiments of the disclosure are further described below in conjunction with the accompanying drawings.

[0165] In the disclosure, the term “channel state information (CSI)” may be used interchangeably with the terms “CSI parameter” or “CSI quantity”.

[0166] In the disclosure, CSI may include at least one of the followings: CSI reference signal (CSI-RS) resource indicator (CRI), rank indicator (RI), precoding matrix indicator (PMI), channel quality indicator (CQI), layer indicator (LI), synchronization signal (SS) / physical broadcast channel (PBCH) block resource indicator (SSBRI), layer 1-reference signal received power (L1-RSRP), layer 1-single to interference noise ratio (L1-SINR), CapabilityIndex.

[0167] In the disclosure, the term “CSI reporting configuration” may be used interchangeably with the terms “CSI reporting configuration information” or “information for CSI reporting configuration” or “information for configuring CSI report”.

[0168] In the disclosure, the CSI may be the CSI reported by the UE in a report, or in a report instance.

[0169] In the disclosure, the term “reference signal” may be used interchangeably with the term “reference signal resource”.

[0170] In the disclosure, the reference signal may include at least one of the followings: a reference signal for synchronization, a reference signal for demodulation (e.g., a demodulation reference signal (DM-RS), a reference signal for obtaining of the channel state, a reference signal for phase tracking, a reference signal for mobility, a reference signal for positioning, a reference signal for channel measurement, a reference signal for interference measurement, a reference signal for sounding. Optionally, the reference signal for synchronization includes at least one of the followings: a primary synchronization signal, a secondary synchronization signal. Optionally, the reference signal for synchronization may include a synchronization signal / physical broadcast channel block (SS / PBCH block, SSB). Optionally, the reference signal for demodulation may include at least one of the followings: a reference signal for data channel demodulation and a reference signal for control channel demodulation. Optionally, the data channel may include at least one of the followings: a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH). Optionally, the control channel may include at least one of the followings: a physical downlink control channel (PDCCH) and a physical uplink control channel (PUCCH). Optionally, the reference signal for obtaining of the channel state may include at least one of the followings: a reference signal for tracking, a reference signal for CSI acquisition, and a reference signal for beam management. Optionally, the reference signal for beam management includes at least one of the followings: a reference signal for obtaining L1-RSRP, a reference signal for obtaining L1-SINR. Optionally, obtaining L1-RSRP may be computing L1-RSRP. Optionally, obtaining L1-SINR may be computing L1-SINR. In the disclosure, the “reference signal for sounding” may be referred as a sounding reference signal (SRS).

[0171] In the disclosure, the term “beam” may include at least one of the followings: “quasi co-location (QCL) parameter”, “transmission configuration indication (TCI) state”, “spatial domain filter”, “antenna port”, “transmission and reception point (TRP)”, “reference signal”, “beam information”, “beam index”. Optionally, a beam and another beam being the same may be a beam and another beam being quasi co-located.

[0172] In the disclosure, an antenna port can be defined such that the channel over which a symbol on the antenna port is conveyed can be inferred from the channel over which another symbol on the same antenna port is conveyed.

[0173] In the disclosure, two antenna ports are said to be quasi co-located if the large-scale properties of the channel over which a symbol on one antenna port is conveyed can be inferred from the channel over which a symbol on the other antenna port is conveyed. Optionally, the large-scale properties include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters.

[0174] In the disclosure, the term “QCL parameter” may be used interchangeably with the terms “QCL information”, “QCL assumption”, “QCL configuration”, “QCL configuration and / or QCL type”. Optionally, the QCL parameter may include / represent at least one of the followings: Doppler shift, Doppler spread, average delay, delay spread, spatial reception parameter. The spatial reception parameter may be a parameter for spatial reception. Optionally, the QCL parameter may include a combination of different types of parameters. For example, the QCL parameter may include Doppler shift, Doppler spread, average delay and delay spread, and such QCL parameter may be referred as QCL parameter type A. For example, the QCL parameter may include Doppler shift and Doppler spread, and such QCL parameter may be referred as QCL parameter type B. For example, the QCL parameter may include Doppler shift and average delay, and such QCL parameter may be referred as QCL parameter type C. For example, the QCL parameter may include spatial reception parameter, and such QCL parameter may be referred as QCL parameter type D. For example, two antenna ports are said to be quasi co-located if the large-scale properties of the channel over which a symbol on one antenna port is conveyed can be inferred from the channel over which a symbol on the other antenna port is conveyed. Optionally, the large-scale properties include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters. For example, two antenna ports are said to be quasi co-located subject to QCL parameter type D if spatial Rx parameters of the channel over which a symbol on one antenna port is conveyed can be inferred from the channel over which a symbol on the other antenna port is conveyed.

[0175] In the disclosure, the term “TCI state” may be used interchangeably with the terms “TCI state configuration” or “TCI state configuration information” or “information for configuring the TCI state” or “information for indicating the TCI state”. Optionally, the TCI state may be a unified TCI state. Optionally, the TCI state may be at least one of an uplink TCI state (UL TCI state), a downlink TCI state (DL TCI state), a joint TCI state. Optionally, the unified TCI state may be an uplink TCI state (UL TCI state) and a downlink TCI state (DL TCI state), or a joint TCI state.

[0176] Optionally, a TCI state may include parameters configuring quasi co-location relation, these parameters configure the relation between the reference signal (e.g., one or two reference signals, or one or two downlink reference signals) and at least one of the followings: a demodulation reference signal (DM-RS) port of the PDSCH, a DM-RS port of the PDCCH, a CSI-RS port of a CSI-RS resource. Optionally, a quasi co-location relation is configured by a higher layer parameter (e.g., qcl-Type1) for the first downlink reference signal. Optionally, a quasi co-location relation is configured by a higher layer parameter (e.g., qcl-Type2) for the second downlink reference signal. In case of two downlink reference signals, the QCL types are not the same, regardless of whether the references are to the same DL RS or different DL RSs.

[0177] In the disclosure, the term “spatial domain filter” may be used interchangeably with the terms “spatial filter” or “uplink transmission spatial domain filter” or “spatial domain filter for uplink transmission” or “spatial domain filter for downlink reception”.

[0178] In the disclosure, the term “transmission occasion of reference signal resource” may be used interchangeably with the term “occasion of reference signal resource” or “reception occasion of reference signal resource” or “transmission occasion of reference signal” or “occasion of reference signal” or “reception occasion of reference signal”.

[0179] In the disclosure, the term “UE capability” may be used interchangeably with the terms “UE feature” or “UE feature group” or “UE capability parameter” or “reported UE capability” or “UE capability signaling” or “reported UE capability parameter”.

[0180] In the disclosure, a time domain resource may include / correspond to several time domain units.

[0181] In the disclosure, a time domain unit may be one of: a frame, a subframe, a slot, a sub-slot, a symbol. Optionally, the sub-slot may be a subset of a slot in time domain. For example, symbols included in the sub-slot are a subset of symbols included in the slot. Optionally, in the disclosure, the time domain unit may be one of: a second, a millisecond, a microsecond, a nanosecond, and a sample.

[0182] In the disclosure, a frequency domain resource may include / correspond to several frequency domain units.

[0183] In the disclosure, a frequency domain unit may be at least one of a band, a subband, a component carrier (CC), a bandwidth part (BWP), a resource block, a resource block group (RBG), a subcarrier, a carrier, a frequency band, a frequency range, a cell, a serving cell. The resource block may be a physical resource block (PRB) or a common resource block (CRB). The frequency range may be frequency range 1, frequency range 2 (e.g., frequency range 2-1 and / or frequency range 2-2).

[0184] In the disclosure, a time-frequency unit may be one of a resource element (RE), a resource element group (REG). The resource element group may include one or more resource elements. For example, a resource element group may include 6 or 12 resource elements.

[0185] In the disclosure, the starting time domain position of a channel or signal or resource is an earlier position in time domain, and the ending time domain position of a channel or signal or resource is a later position in time domain.

[0186] In the disclosure, the starting frequency domain position of a channel or signal or resource is a lower position in frequency domain, and the ending frequency domain position of a channel or signal or resource is a higher position in frequency domain.

[0187] In the disclosure, the term “PDCCH” may be used interchangeably with the terms “downlink control channel” or “control channel for downlink transmission” or “control channel for downlink”.

[0188] In the disclosure, the term “PDCCH” may be used interchangeably with the term “PDCCH candidate”.

[0189] In the disclosure, the term “PDSCH” may be used interchangeably with the terms “downlink data channel” or “data channel for downlink transmission” or “data channel for downlink”.

[0190] In the disclosure, the term “PUCCH” may be used interchangeably with the terms “uplink control channel” or “control channel for uplink transmission” or “control channel for uplink”.

[0191] In the disclosure, the term “PUSCH” may be used interchangeably with the terms “uplink data channel” or “data channel for uplink transmission” or “data channel for uplink”.

[0192] In the disclosure, the term “downlink control information (DCI)” may be used interchangeably with the terms “DCI format” or “control information for downlink”.

[0193] In the disclosure, the term “uplink control information (UCI)” may be used interchangeably with the term “control information for uplink”.

[0194] In the disclosure, detecting DCI includes: receiving and / or decoding DCI.

[0195] In the disclosure, the term “information bits of DCI / UCI” may be used interchangeably with the terms “information bits associated with DCI / UCI” or “information bits included in DCI / UCI” or “information bits corresponding to DCI / UCI”. Optionally, the information bits associated with DCI / UCI may include information bits of the DCI / UCI and check bits (for example, cyclic redundancy check (CRC) bits) corresponding to the DCI / UCI. Optionally, the information bits associated with DCI / UCI may include information bits of the DCI / UCI and bits (for example, cyclic redundancy check (CRC) bits) for checking the DCI / UCI.

[0196] In the disclosure, the term “information bits of PDSCH / PUSCH” may be used interchangeably with the term “information bits associated with PDSCH / PUSCH” or “information bits carried by PDSCH / PUSCH” or “information bits of TB included in PDSCH / PUSCH” or “information bits of TB carried by PDSCH / PUSCH”. Optionally, the information bits associated with the information bits carried by PDSCH / PUSCH may include the information bits of TB carried by PDSCH / PUSCH and the check bits (for example, cyclic redundancy check (CRC) bits) corresponding to the TB. Optionally, the information bits associated with PDSCH / PUSCH may include information bits of PDSCH / PUSCH and bits (for example, cyclic redundancy check (CRC) bits) for checking the TB carried by the PDSCH / PUSCH.

[0197] In the disclosure, the term “size of information field” may be used interchangeably with the terms “bitwidth of information field” or “number of information bits in information field”.

[0198] In the disclosure, the information bits of the DCI may be the information bits included in the DCI, or the information bits associated with the DCI, or the payload of the DCI.

[0199] In the disclosure, the existence of an information field may be that the size of the information field is greater than 0 bit. The absence of an information field may be that the size of the information field is equal to 0 bit.

[0200] In the disclosure, the value x of an information field may correspond to the (x+1)-th codepoint of the information field, The term “value of an information field” may be used interchangeably with the term “codepoint of an information field”. The term “value x of an information field” may be used interchangeably with the term “(x+1)-th codepoint of an information field”, where

[0201] In the disclosure, the term “control resource set (CORESET)” may be used interchangeably with the terms “control resource” or “resource for receiving control information” or “resource for monitoring PDCCH” or “resource for detecting control information”.

[0202] In the disclosure, the term “search space” may be used interchangeably with the terms “PDCCH search space” or “PDCCH search space set” or “PDCCH candidate search space” or “PDCCH candidate search space set” or “search space for searching PDCCH” or “search space for searching PDCCH candidate” or “search space set for searching PDCCH candidate” or “search space set for searching PDCCH candidate”. Optionally, the search space may be a common search space (CSS) or a UE-specific search space (USS). Optionally, the search space may be used for detecting DCI. Optionally, the search space may be used for detecting DCI format.

[0203] In the disclosure, the term “PDCCH candidate associated with search space” may be used interchangeably with the term “PDCCH candidate in search space”.

[0204] In the disclosure, the modulation scheme associated with the PDCCH candidate may be the modulation scheme used by the corresponding PDCCH candidate. The aggregation level associated with the PDCCH candidate may be the aggregation level of the corresponding PDCCH candidate.

[0205] In the disclosure, the UE may monitor the PDCCH (or monitor the PDCCH candidate) in PDCCH monitoring occasion(s). Optionally, the PDCCH monitoring occasion may be one or more (consecutive) time domain units. Optionally, the PDCCH monitoring occasion may be an occasion for monitoring the PDCCH, or an occasion for monitoring the PDCCH candidate.

[0206] In the disclosure, monitoring the PDCCH candidate may be receiving the PDCCH candidate and / or decoding according to the monitored DCI format.

[0207] In the disclosure, the DCI format may be at least one of the followings: DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 0_3, DCI format 1_0, DCI format 1_1, DCI format 1_2, and DCI format 1_3. In the disclosure, the type of the DCI format may be one of the followings: DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 0_3, DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 1_3.

[0208] In the disclosure, hybrid automatic repeat request (HARQ) information may be hybrid automatic repeat request-acknowledgement (HARQ-ACK) information.

[0209] In the disclosure, the PDCCH may carry the DCI and / or the CRC corresponding to the DCI, or the DCI and / or the CRC corresponding to the DCI may be in the PDCCH. Optionally, the CRC may be scrambled in a specific manner. For example, optionally, the CRC may be scrambled based on a radio network temporary identifier (RNTI). Two PDCCHs having the same scrambling may be these two PDCCHs being scrambled by the same RNTI. Optionally, the RNTI may be one of a cell radio network temporary identifier (C-RNTI), a configured scheduling radio network temporary identifier (CS-RNTI).

[0210] In the disclosure, the higher layer parameter includes at least one of a radio resource control (RRC) parameter, a media access control (MAC)-control element (CE) (MAC-CE) parameter. The RRC parameter may be a parameter configured / indicated by RRC signaling. The MAC-CE parameter may be a parameter indicated / activated by MAC-CE signaling. Optionally, information being configured by a higher layer parameter may be the information being indicated / activated by the higher layer parameter.

[0211] In the disclosure, the higher layer signaling includes at least one of the RRC parameter, the parameter indicated by MAC-CE; or the higher layer signaling may include at least one of RRC signaling and MAC-CE signaling. Optionally, information being configured by higher layer signaling may be the information being indicated / activated by the higher layer signaling.

[0212] In the disclosure, the UE obtaining configuration information may be the UE receiving / being configured with the configuration information. In the disclosure, “obtaining configuration information” may be used interchangeably with the terms “receiving configuration information” or “being configured with configuration information”.

[0213] In the disclosure, a cell includes at least one of the followings: a serving cell, a candidate cell, a primary cell, a secondary cell, and a special cell. The special cell may be a current special cell.

[0214] In the disclosure, when the DCI schedules a channel or signal, a cell receiving or transmitting the channel or signal may be referred as a scheduled cell. A cell where the DCI is detected or a cell where the DCI is monitored / received may be referred as a scheduling cell.

[0215] In the disclosure, when the DCI schedules a channel or signal, a BWP receiving or transmitting the channel or signal may be referred as a scheduled BWP. A BWP where the DCI is detected, or a BWP where the PDCCH associated with the DCI is monitored / received may be referred as a scheduling BWP.

[0216] In the disclosure, “determining measurement” may be determining the result of the measurement, or obtaining the result of the measurement, or obtaining the measurement based on the reference signal, or obtaining the measurement based on the measurement resource, or obtaining the measurement for determining the CSI.

[0217] In the disclosure, “determining channel measurement” may be determining the result of the channel measurement, or obtaining the result of the channel measurement, or obtaining the channel measurement based on the reference signal, or obtaining the channel measurement based on the measurement resource, or obtaining the channel measurement for determining the CSI.

[0218] In the disclosure, “determining interference measurement” may be determining the result of the interference measurement, or obtaining the result of the interference measurement, or obtaining the interference measurement based on the reference signal, or obtaining the interference measurement based on the measurement resource, or obtaining the interference measurement used for determining the CSI.

[0219] In the disclosure, the term “uplink channel associated with CSI report” may be used interchangeably with the terms “uplink channel corresponding to the CSI report” or “uplink channel carrying the CSI report”.

[0220] In the disclosure, a numerology may refer to a set of parameters that define a basic time unit and frequency unit in the wireless communication system. These parameters may be used for determining the waveform, subcarrier spacing, and sampling rate of the signal. The numerology may include at least one of the followings: subcarrier spacing, cyclic prefix, symbol periodicity, sampling rate, slot length, frame structure. Optionally, the subcarrier spacing may be the frequency difference between two neighboring subcarriers, typically in Hertz (Hz). The subcarrier spacing decides the bandwidth and time resolution of the system. Optionally, the cyclic prefix is a cyclic prefix added at the beginning of the OFDM symbol. The length of the cyclic prefix is associated with the subcarrier spacing: the addition of the cyclic prefix is to reduce the impact of multipath effects. Optionally, the symbol periodicity may be the duration of one OFDM symbol. Optionally, the symbol periodicity may be the reciprocal of the subcarrier spacing. Optionally, the sampling rate may be the sampling frequency at which signals are received and transmitted. Optionally, the sampling rate is associated with the subcarrier spacing. Optionally, the slot length may be a time period used for distinguishing uplink and downlink in a time division duplex (TDD) system. Optionally, the slot length is associated with the subcarrier spacing and the symbol periodicity. Optionally, the frame structure is used for defining the organization of slots within the frame, including the length of the frame and the number of slots. In 5G new radio (NR), multiple different numerology configurations may be supported to fit different frequency bands and application scenarios. For example, low frequency bands may use larger subcarrier spacing to support wider bandwidth and longer transmission distance, while high frequency bands may use smaller subcarrier spacing to support higher data rate and lower latency.

[0221] In the disclosure, a cell may be a primary cell (PCell) and / or a primary secondary cell (PSCell) and / or a secondary cell and / or a special cell. In the disclosure, the cell may be one of the primary cell and the secondary cell. The Special Cell may be the PCell or the PSCell. In dual connectivity operation, the special cell refers to the primary cell of a master cell group (MCG) or the primary secondary cell of a secondary cell group (SCG), otherwise, the special cell refers to the primary cell. A cell may be a serving cell or a non-serving cell.

[0222] FIG. 4 illustrates a method 400 performed by a user equipment (UE) according to various embodiments of the disclosure. The method 410 includes at 410, the UE receives a CSI reporting configuration from a base station, where the CSI reporting configuration indicates a resource set for channel measurement including K resources, at 420, 1) (when MRresources of the K resources are configured for reporting,) the UE reports CSI associated with the MRresources and CSI associated with M-MRresources, where the M and MRresources are indicated by the CSI reporting configuration, and the M-MRresources are from K-MRresources of the K resources other than MRresources, where in case that the reported CSI includes CSI Part 1 and CSI Part 2 and the CSI reporting configuration indicates that each of the K resources corresponds to a RI restriction: CSI Part 1 associated with the m-th ( ) resource of the M-MRresources is zero-padded to a fixed payload size, or CSI Part 1 associated with the M-MRresources is zero-padded to a fixed payload size; or 2) (when MRresources are not configured for reporting,) the UE reports CSI associated with M resources, where M is indicated by the CSI reporting configuration, and the M resources are from the K resources, where in the case where the CSI associated with M resources is carried by PUCCH and has a wideband frequency domain granularity, and the CSI reporting configuration indicates that each of the K resources corresponds to a RI restriction: i) CSI associated with the m-th ( ) resource of the M resources includes zero-padding bits, where the number of the zero-padding bits is determined based on the difference of a third number and a fourth number, where the third number is determined based on the size of the CSI field associated with each of the K resources and determined based on the corresponding RI restriction, and the fourth number is determined based on the size of the CSI field associated with the m-th resource, or ii) the CSI associated with the M resources includes zero-padding bits, where the number of the zero-padding bits is determined based on the difference of a seventh number and an eighth number, where the seventh number is determined based on the summation of M sizes of the CSI fields of sizes of the CSI fields associated with each of the K resources and the eighth number is determined based on the summation of sizes of CSI fields corresponding to the M resources.

[0223] Each step in the above method 400 is described in detail below.

[0224] In some cases, the UE may receive / be configured with the CSI reporting configuration (e.g., CSI-ReportConfig). Optionally, the CSI reporting configuration may be associated with / corresponding to a CSI resource setting. Optionally, a CSI resource setting (e.g., CSI-ResourceConfig) may be associated with / correspond to one or more resource sets. Optionally, the CSI resource setting may indicate one or more resource sets. Optionally, the CSI reporting configuration information may indicate / be configured / be associated with resource set(s). Optionally, a resource set may include one or more resources. Optionally, the resource set may include at least one of CSI-RS resource, SSB resource and CSI interference measurement (CSI-IM) resource. Optionally, the CSI-RS resource may be a non-zero power (NZP) CSI-RS. Optionally, the CSI reporting configuration information may indicate / be configured / be associated with at least one of the followings:

[0225] ● A resource set for channel measurement. Optionally, the resource set includes K resources. Optionally, or or Optionally, the resource set may be configured by a higher layer parameter NZP-CSI-RS-ResourceSet, where the parameter includes configuration information of one or more resources. The resource may be the CSI-RS resource and / or the SSB resource. Optionally, the numbers of ports of each CSI-RS resource in the resource set are the same. Optionally, the number of ports of each CSI-RS resource in the resource set is less than or equal to 32.

[0226] ● A resource set for interference measurement. The resource set includes K_inter resources. Optionally, Optionally, the resource may be the CSI-RS resource and / or the CSI-IM resource. Optionally, the resources in the resource set for channel measurement may be associated with the resources in the resource set for interference measurement. Optionally, the UE determines the CSI based on the resources for channel measurement and associated resources for interference measurement.

[0227] ■ When the resource(s) included in the resource set for interference measurement are CSI-IM resource(s), Optionally, the K resource(s) for channel measurement are one-to-one corresponding to / associated with the K resource(s) for interference measurement. Optionally, the k-th resource in the resource set for channel measurement is associated with the k-th resource in the resource set for interference measurement. Optionally, and / or For example, if interference measurement is performed on CSI-IM, each resource (e.g., CSI-RS resource) for channel measurement is associated with a resource (e.g., CSI-IM resource) for interference measurement. For example, if interference measurement is performed on CSI-IM, each resource (e.g., CSI-RS resource) for channel measurement is resource-wise associated with a resource (e.g., CSI-IM resource) for interference measurement by the ordering of the CSI-RS resources and CSI-IM resources in the corresponding resource sets. For example, the resource set for channel measurement includes {CSI-RS#1, CSI-RS#2, CSI-RS#3, CSI-RS #4}; the resource set for interference measurement includes {CSI-IM#1, CSI-IM#2, CSI-IM#3, CSI-IM#4}, CSI-RS#1 is associated with CSI-IM#1; CSI-RS#2 is associated with CSI-IM#2; CSI-RS#3 is associated with CSI-IM#3; CSI-RS#4 is associated with CSI-IM#4.

[0228] ■ When the resources included in the resource set for interference measurement are CSI-RS resources, K_inter = 1. Optionally, the K resources for channel measurement are associated with one resource for interference measurement. For example, if interference measurement is performed on CSI-RS, each resource (e.g., CSI-RS resource) for channel measurement is associated with the resource (e.g., CSI-RS resource) for interference measurement. For example, the resource set for channel measurement includes {CSI-RS#1, CSI-RS#2, CSI-RS#3, CSI-RS #4}; the resource set for interference measurement includes {CSI-RS#5}, CSI-RS#1 is associated with CSI-RS#5; CSI-RS#2 is associated with CSI-RS#5; CSI-RS#3 is associated with CSI-RS#5; CSI-RS#4 is associated with CSI-RS#5.

[0229] Optionally, the K resources in the resource set for channel measurement may be configured with a common rank restriction. Optionally, the K resources in the resource set for channel measurement may be configured with a rank restriction. Optionally, the rank restriction is applicable to each of the K resources.

[0230] Optionally, the K resource(s) in the resource set for channel measurement may be configured with rank restriction(s) respectively. Optionally, each of the K resource(s) in the resource set may be configured with a respective / associated / corresponding rank restriction. Optionally, K rank restriction(s) may be configured. Optionally, the K rank restriction(s) may also be called resource-specific rank restrictions. Optionally, the K rank restriction(s) may be configured by a higher layer parameter. Optionally, the K rank restriction(s) may be configured by the CSI reporting configuration. Optionally, the k-th resource of the K resources corresponds to / is associated with the k-th rank restriction of the K rank restriction(s), where

[0231] Optionally, the CSI of a CSI-RS resource (or the CSI associated with a CSI-RS resource) is determined based on the rank restriction corresponding to / associated with the CSI-RS resource. Optionally, the rank restriction corresponding to / associated with the CSI-RS resource is applicable to the determination of the CSI of the CSI-RS resource (for example, the determination of RI and / or PMI). Optionally, the rank restriction may be the RI restriction. Optionally, the rank restriction refers to the restriction on RI. Optionally, the rank restriction refers to the value restriction of RI. Optionally, the rank restriction refers to the restriction on RI and / or PMI. Optionally, the rank restriction refers to the restriction on RI and / or PMI corresponding to RI. Optionally, the rank restriction may be used for indicating which numbers of layers are not allowed or which numbers of layers are allowed. Optionally, the rank restriction may be used for indicating which value(s) of RI are not allowed or which values of RI are allowed. In the disclosure, the allowed rank(s) may be understood as the allowed number of layer(s), or the allowed value of RI. Here, the value of a RI being allowed refers to the value of a RI being allowed to be reported. The value of a RI being not allowed refers to the value of a RI being not allowed to be reported. In the disclosure, the term “allowed rank” may be used interchangeably with the term “allowed number of layers” or “allowed value of RI”. Optionally, the rank restriction may be determined by a parameter for indicating the rank restriction (for example, typeI-SinglePanel-ri-Restriction, or typeII-RI-Restriction, or ri-Restriction). Optionally, a parameter for indicating the rank restriction includes / forms / indicates a bitmap. The number of bits may be a bit sequence. Optionally, the bitmap for rank restriction indication may be rR, ..., r1, r0. Optionally, each bit indicates / corresponds to a rank. Optionally, each bit indicates / corresponds to a value of RI. Optionally, r0may be a Least Significant Bit (LSB), and rRmay be a Most Significant Bit (MSB). Here, the value of R may be one of 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12. One of rR, ..., r1, r0is ri, where When riis 0, PMI and / or RI reporting are not allowed to correspond to any precoder associated with v=i+1 layers. When riis 1, PMI and / or RI reporting are allowed to correspond to any precoder associated with v=i+1 layers. Here, v represents the value of rank, or the number of layers. Optionally, when riis 0, the rank corresponding to riis not allowed. When riis 1, the rank corresponding to riis allowed.

[0232] Optionally, for the CSI reporting configuration, the UE determines and / or reports the CSI. Optionally, for the CSI reporting configuration, the UE determines and / or reports the associated / corresponding CSI. Optionally, the UE determines and / or reports the CSI associated with / corresponding to the CSI reporting configuration. Optionally, the UE determines and / or reports the CSI, where the CSI is associated with the resource(s) in the resource set(s) associated with / corresponding to the CSI reporting configuration. Optionally, the UE determines and / or reports the CSI associated with M resources. Optionally, the M resources are in the resource set for channel measurement. Optionally, the M resources are the M resources in the resource set for channel measurement. Optionally, the M resources may refer to the reported resources. Optionally, the M may refer to the number of the reported resources. Optionally, the UE determines and / or reports the CSI associated with each of the M resources. Optionally, the CSI is in a report instance. Optionally, the CSI associated with the M resources are (reported) in one instance.

[0233] In the disclosure, “CSI associated with resource” may be used interchangeably with the term “CSI of resource” or “CSI associated with CRI” or “CSI of CRI”. Optionally, the resource may be referred by the CRI corresponding to the resource. For example, the CSI associated with one of the (reported) M resources may be called the CSI associated with one of the (reported) M CRIs. Optionally, the CSI associated with a resource may be the CSI obtained / determined based on the resource. Optionally, the CSI associated with a resource may be the CSI obtained / determined based on the measurement of the resource. Optionally, the CSI associated with a resource may be the CSI determined based on CRI corresponding to the resource.

[0234] The characteristics of M are discussed below. Optionally, or or Optionally, Optionally, the value range of M may be from 1 to min(4, K). Optionally, the maximum value of M is determined based on the UE capability. For example, the maximum value of M is indicated by the UE capability. Optionally, the value of M is configured by RRC signaling. For example, the value of M is configured by the CSI reporting configuration. Optionally, the value of M may be indicated by MAC-CE and / or DCI.

[0235] The characteristics of the M resources are discussed below. Optionally, the M resources may be from the K resources. Optionally, the M resources may be selected from the K resources. Optionally, the M resources may be M different resources. For example, the M resources may be M different resources of the K resources. For example, M CRIs may be M different CRIs. For example, the CRIs corresponding to the M resources may be M different CRIs.

[0236] ● Optionally, MR( ) resources may be indicated / configured (by the base station). Optionally, the MRresources may be configured by at least one of RRC, MAC-CE and DCI. For example, the MRresources may be configured by RRC and further activated / indicated by MAC-CE or DCI. For example, the MRresources may be indicated / configured by the CSI reporting configuration. Optionally, the MRresources are from the K resources. Optionally, the MRresources may be indicated by MRindexes. Optionally, the value of one of the MRindexes may be m. Optionally, Optionally, m indicates / corresponds to the (m+1)-th resource in the resource set. Optionally, the MRresources may be indicated for aperiodic CSI reporting. Optionally, Optionally, the value of MRmay be one of 0, 1, 2, 3 and 4.

[0237] ● When the MRresources are configured / indicated, the UE (always) reports the CSI associated with the MRresources. When the MRresources are configured / indicated, the M resources include the MRresources and M-MRresources. Optionally, the UE determines and / or reports the CSI associated with the MRresources and / or the CSI associated with the M-MRresources. Optionally, the UE determines and / or reports the CSI associated with each of the MRresources and / or the CSI associated with each of the M-MRresources. Optionally, the M-MRresources are from the K-MRresources. Optionally, the M-MRresources are selected from the K-MRresources. Optionally, the K-MRresources refer to the K-MRresources other than the configured / indicated MRresources in the resource set.

[0238] ● Optionally, when MR=0, it may be considered that the UE does not always report a specific resource of the K resources. Optionally, when the MRresources are not configured / indicated, it may be considered that MR=0. Optionally, when the MRresources are not configured, the UE determines and / or reports the CSI associated with the M resources. Optionally, the M resources are in the resource set for channel measurement.

[0239] Optionally, the CSI includes at least one of CRI, RI, PMI, CQI and LI. Optionally, the CSI includes CRI and / or the CSI associated with CRI. Optionally, the CSI associated with one / each of the M resources includes at least one of CRI, RI, PMI, CQI and LI. Optionally, the CSI associated with one / each of the M resources includes CRI and / or the CSI associated with / corresponding to CRI. Optionally, the CSI associated with / corresponding to CRI includes at least one of RI, PMI, CQI and LI.

[0240] Optionally, the CSI associated with the resource may include at least RI. In the disclosure, “CSI includes at least RI” may be used interchangeably with “report quantity parameter corresponding to (or configured by) CSI reporting configuration may include at least 'RI'”. Optionally, the report quantity parameter (for example, reportQuantity) corresponding to (or configured by) the CSI reporting configuration include at least 'RI'. For example, the report quantity parameter (for example, reportQuantity) corresponding to (or included in, or configured by, or indicated by) the CSI reporting configuration may be set to at least one of “cri-RI-PMI-CQI”, “cri-RI-LI-PMI-CQI”, “cri-RI-i1”, “cri-RI-i1-CQI”, “cri-RI-CQI”. For example, the report quantity parameter (for example, reportQuantity) included in the CSI reporting configuration may be set to at least one of “cri-RI-PMI-CQI”, “cri-RI-LI-PMI-CQI”, “cri-RI-i1-CQI”, “cri-RI-CQI”.

[0241] Associated characteristics of CRI in the CSI are described below.

[0242] Optionally, there is no CRI in the CSI associated with each of the MRresources. Optionally, CRI is not included in the CSI associated with each of the MRresources. Optionally, in the CSI associated with each of the MRresources, the size of the CRI field is 0. Optionally, the CSI associated with each of the MRresources reported by the UE does not include the CRI associated with each of the MRresources.

[0243] Optionally, there is CRI in the CSI associated with each of the M-MRresources. Optionally, CRI is included in the CSI associated with each of the M-MRresources. Optionally, the CRI may be indicated by the CRI field. Optionally, the size of the CRI field associated with the M-MRresources is determined based on K-MR. Optionally, the size of the CRI field associated with each of the M-MRresources is determined based on K-MR. For example, the size of the CRI field is equal to Optionally, the value k ( ) of CRI may be for indicating one of the K-MRresources. Optionally, the value k of CRI may correspond to one of the K-MRresources. For example, the value k of CRI corresponds to / is mapped to the (k+1)-th resource of the K-MRresources. For example, when the value k of CRI corresponds to / is mapped to the (k+1)-th resource of the K-MRresources. For example, the value k of CRI (when ) corresponds to the (k+1)-th resource determined based on the ascending / descending order of IDs of CSI-RS resources of the K-MRresources. For example, (when ) the value k of CRI corresponds to the (k+1)-th resource determined based on the configuration information of the resource set of the K-MRresources. For example, (when ) the value k of CRI corresponds to the (k+1)-th entry in NZP-CSI-RS-ResourceSet corresponding to the K-MRresources. The above method may enable the base station to determine the resources on which the CSI is computed based, so that the base station may use the transmission parameter associated with the corresponding resource(s) to schedule accordingly, improving the accuracy of the communication system.

[0244] Associated characteristics of RI in the CSI are described below.

[0245] Optionally, RI may be included in the CSI. Optionally, there is RI in the CSI associated with each of the M resources. Optionally, RI may be indicated by a RI field. Optionally, the size of the RI field may be determined based on the allowed rank. Optionally, the size of the RI field is determined based on the number (e.g., nRI) of allowed RI values. Optionally, the size of the RI field is determined according to the number of allowed RI values associated with the corresponding CSI-RS resource. Optionally, when each of the K resources is configured with the rank restriction, the size of the RI field is determined according to the number of allowed RI values associated with the corresponding CSI-RS resource. Optionally, the size of the RI field may be determined based on where refers to the number of the allowed RI values. Optionally, the values of the rank indicator field are mapped to allowed rank indicator values with increasing / decreasing order, where '0' is mapped to the smallest allowed rank indicator value. Optionally, refer above for the determination method of the allowed rank. For example, rank restriction parameter associated with / corresponding to a resource indicates that the allowed rank values are: 1, 3, 4, where RI = 0 represents rank 1, RI = 1 represents rank 3, and RI = 2 represents rank 4. The determination method of the RI field is based on one of the following Tables. The size of the RI field may be determined based on one of Table 1, Table 2 and Table 3. Refer Table 1, Table 2 and Table 3 below.

[0246] For decoding of CSI, the base station needs to determine the size of the CSI before acquiring the specific content indicated by the CSI. Since which resources are reported is determined by the UE, and since each resource may be configured with corresponding configuration (e.g., rank restriction, codebook configuration) for CSI computation / CSI determination, the number of information bits associated with the corresponding CSI field may be different. The following method may allow that no matter which resources are selected by the UE for reporting, the number of information bits corresponding to their CSI is fixed, which avoids the base station from trying to decode based on multiple possible numbers of information bits corresponding to CSI, reducing the complexity of the base station and improving the performance of the communication system.

[0247] The CSI reported by the UE may include one part or two parts. The CSI including only one part may be called a single part CSI. Two parts included in the CSI may be called CSI Part 1 and CSI Part 2, respectively. Optionally, if the CSI includes only one part, the number of information bits of the CSI is fixed. Optionally, if the CSI includes two parts, the number of information bits of the CSI Part 1 is fixed. Optionally, the CSI Part 1 has a fixed payload size and / or is used to identify the number of information bits in CSI Part 2.

[0248] The case where the CSI includes CSI Part 1 and / or CSI Part 2 is discussed below.

[0249] Optionally, the CSI associated with the M resources includes CSI Part 1. Optionally, the CSI associated with the M resources includes CSI Part 1 and CSI Part 2. The RI field is included in CSI Part 1. When the RI restriction corresponding to each of the K resources is indicated, the sizes of the RI fields corresponding to different resources may be different. For the M-MRresources selected / reported by the UE, when different M-MRresources are selected from the K-MRresources, the sizes of the RI fields associated with the M-MRresources are different and cannot be known in advance by the base station. Therefore, the UE needs to zero-pad the reported CSI so that the payload size of CSI Part 1 is fixed regardless of which M-MRresources are selected to ensure that the base station can decode the CSI correctly.

[0250] Method #1 for a fixed payload of CSI Part 1 is described below. In the following description, the description of M-MRresources may also be applicable to M resources. In the following description, the description of K-MRresources may also be applicable to K resources. It may be considered that M-MRresources may be equivalent to M resources when MR= 0 or MRresources are not configured. It may be considered that K-MRresources may be equivalent to K resources when MR= 0 or MRresources are not configured.

[0251] Optionally, CSI Part 1 associated with one / each of the M-MRresources is zero-padded to a fixed payload size. Optionally, when a first condition is satisfied, CSI Part 1 associated with one / each of the M-MRresources is zero-padded to a fixed payload size. Optionally, CSI Part 1 associated with the m-th ( ) resource of the M-MRresources is zero-padded to a fixed payload size. Optionally, when the first condition is satisfied, CSI Part 1 associated with the m-th resource of the M-MRresources is zero-padded to a fixed payload size. Optionally, the first condition includes at least one of the followings:

[0252] ● The CSI includes CSI Part 1 and / or CSI Part 2. For example, the CSI associated with the M-MRresources includes CSI Part 1 and / or CSI Part 2;

[0253] ● The CSI is CSI Part 1. For example, the CSI associated with the M-MRresources is CSI Part 1;

[0254] ● The RI restriction corresponding to each of the K resources is indicated / configured;

[0255] ● The number of ports of a resource of the K resources is greater than 1. For example, the number of ports of each of the K resources is greater than 1;

[0256] ●

[0257] ● The CSI report is aperiodic CSI report. For example, the report used for reporting the CSI associated with the M resources is aperiodic CSI report.

[0258] Optionally, when the first condition is not satisfied, CSI Part 1 associated with the m-th ( ) resource of the M-MRresources does not include zero-padding bits. Optionally, when the first condition is not satisfied, the number of CSI Part 1 zero-padding bits associated with the m-th ( ) resource of the M-MRresources is 0.

[0259] Optionally, the CSI of one or each of the M-MRresources (e.g., the reported M-MRresources) includes P bits. Optionally, the CSI of the m-th resource of the M-MRresources includes Pmbits. Optionally, the values of Pmbits are all 0s. Optionally, the Pmbits are all 0s. Optionally, the Pmbits are zero-padding bits. Optionally, the Pmbits are consecutive.

[0260] Optionally, Pmis determined based on the allowed rank(s) associated with the K-MRresources and the allowed rank associated with the m-th resource of the M-MRresources. Optionally, Pmis determined based on the difference of the number of bits determined based on the allowed rank(s) associated with the K-MRresources and the number of bits determined based on the allowed rank associated with the m-th resource. In the disclosure, the number of bits determined based on the allowed rank may be the number of bits of the RI field. Optionally, the number (Pm) of the zero-padding bits in CSI Part 1 associated with the m-th resource is equal to the difference of a first number and a second number. The first number may be termed as The second number may be termed as Optionally, the first number may be indicated by the base station. For example, the first number may be indicated by at least one of RRC, MAC-CE and DCI. For example, the first number may be indicated by the CSI reporting configuration. Optionally, the first number may be determined based on the RI restriction(s) corresponding to each of the K-MRresources. Optionally, the first number is equal to the maximum value of K-MRsize(s) of the RI field(s) determined based on the RI restriction(s) corresponding to each of the K-MRresources. Optionally, the second number is determined based on the RI restriction corresponding to the m-th resource. Optionally, the second number is equal to the size of the RI field determined based on the RI restriction corresponding to the m-th resource. Here, the first number is, for example, Here, the second number is, for example,

[0261] Optionally, Pmis based on / equal to Optionally, is determined based on the allowed rank(s) associated with the K-MRresources. Optionally, is determined based on the number of allowed rank(s) associated with the K-MRresource(s). Optionally, is determined based on (or equal to) the maximum value of the numbers of bits determined based on the allowed rank(s) associated with each of the K-MRresources. Optionally, is based on (or equal to) the number of bits determined based on the allowed rank associated with one of the K-MRresources. Optionally, the resource refers to the resource with the corresponding number of information bits being the largest of the K-MRresource(s). Optionally, Optionally,Qrepresents a set including the K-MRresource(s). Optionally,Qrepresents a set including CRIs corresponding to the K-MRresource(s). Optionally,Qrepresents a set of {1, 2, ..., K-MR}. Optionally, is determined based on the number of bits determined based on the allowed rank(s) associated with the k-th resource of the K-MRresources. Optionally, is determined based on the size of the RI field determined based on the allowed rank associated with the k-th resource of the K-MRresources. Here, Optionally, is determined based on the number of bits determined based on the allowed rank associated with the m-th resource of the M-MRresources. Optionally, is based on the size of the RI field associated with the m-th resource of M-MRresources. Optionally, the bits may be CSI bits, or CSI information bits, or bits of the CSI field. Optionally, the number of bits may be the number of bits of the RI field. Optionally, may be determined based on one of Table 1, Table 2 and Table 3. Optionally, is based on or equal to where refers to the number of allowed RI value(s) corresponding to the k-th resource, or refers to the number of allowed rank(s) corresponding to the k-th resource. Optionally, may be determined based on one of Table 1, Table 2 and Table 3. Optionally, is based on or equal to where refers to the number of the allowed RI value(s) corresponding to the m-th resource, or refers to the number of the allowed rank(s) corresponding to the m-th resource.

[0262] Optionally, the RI field associated with the m-th resource may be equal to the first number. Optionally, the RI field associated with each of the M-MRresources may be equal to the first number. Optionally, when the RI field associated with each of the M-MRresources is equal to the first number, the zero-padding bits are in the RI field. For example, the RI field associated with the m-th resource includes Pmbits.

[0263] The UE and the base station need to predefine the position where the Pmbits are located so that the base station can interpret the corresponding field correctly after receiving the CSI. The position where the zero-padding bits (e.g., Pmbits) are located are discussed below. Optionally, the zero-padding bits are added after the RI field associated with the m-th resource, and / or the zero-padding bits are added before the CQI field associated with the m-th resource. Optionally, the zero-padding bits are added after the information bits corresponding to the RI field associated with the m-th resource, and / or the zero-padding bits are added before the information bits corresponding to the CQI field associated with the m-th resource. Optionally, the zero-padding bits may be at the beginning / end in the RI field associated with the m-th resource.

[0264] Method #2 for a fixed payload of CSI Part 1 is described below. In the following description, the description of M-MRresources may also be applicable to M resources. In the following description, the description of K-MRresources may also be applicable to K resources. It may be considered that M-MRresources may be equivalent to M resources when MR= 0 or MRresources are not configured. It may be considered that K-MRresources may be equivalent to K resources when MR= 0 or MRresources are not configured.

[0265] Optionally, CSI Part 1 associated with the M-MRresources is zero-padded to a fixed payload size. Optionally, when the first condition is satisfied, CSI Part 1 associated with the M-MRresources is zero-padded to a fixed payload size. Optionally, the first condition is described above.

[0266] Optionally, the CSI of the M-MRresources (e.g., the reported M-MRresources) includes P bits. Optionally, the P bits are all 0s. Optionally, the values of the P bits are all 0s. Optionally, the P bits are the zero-padding bits. Optionally, the P bits are consecutive bits.

[0267] Optionally, P is determined based on the allowed rank associated with the K-MRresources and the allowed rank associated with the M-MRresources. Optionally, P is determined based on the difference of the number of bits determined based on the allowed rank and associated with the K-MRresources and the number of bits determined based on the allowed rank and associated with the M-MRresources. Optionally, the number of bits may be the number of CSI bits. Optionally, the number of CSI bits may be the number of bits of the CSI field. Optionally, the CSI field includes at least one of the RI field, the PMI field, the CQI field and the LI field. Optionally, the allowed rank associated with the resources refers to the allowed rank associated with each of the K-MRresources. Optionally, the allowed rank associated with the M-MRresources refers to the allowed rank associated with each of the M-MRresources. The number of the zero-padding bits in CSI Part 1 associated with the M-MRresources is equal to the difference of a fifth number and a sixth number. Optionally, the fifth number is determined based on the RI restriction corresponding to each of the K-MRresources. Optionally, the sixth number is determined based on RI restrictions corresponding to the M-MRresources. Optionally, the fifth number may be indicated by the base station. For example, the fifth number may be indicated by at least one of RRC, MAC-CE and DCI. For example, the fifth number may be indicated by the CSI reporting configuration. Optionally, the fifth number is equal to the summation of M-MRsizes of the RI fields of K-MRsizes of the RI fields determined based on the RI restrictions corresponding to each of the K-MRresources. Optionally, the M-MRsizes of the RI fields refer to the M-MRsizes of the RI fields with the largest value of the K-MRsizes of the RI fields. Optionally, the sixth number is equal to the summation of the M-MRsizes of the RI fields determined based on the RI restrictions corresponding to each of the M-MRresources. Here, the fifth number is, for example, Here, the sixth number is, for example,

[0268] Optionally, P is based on (or equal to) Optionally, may be the maximum number of bits associated with the K-MRresources. Optionally, may be the maximum number of bits associated with the M-MRresources of the K-MRresources. may be the summation of the numbers of bits associated with the M-MRresources of the K-MRresources. Optionally, the M-MRresources are the reported resources.

[0269] ● Optionally, is determined based on the allowed rank associated with the K-MRresources. Optionally, is based on (or equal to) the summation of the M-MRlargest values of the values (e.g., K-MRvalues) of the number of bits determined based on the allowed rank and associated with each of the K-MRresources. Optionally, is based on (or equal to) the summation of the numbers of bits determined based on the allowed rank and associated with each of the M-MRresources of the K-MRresources. Optionally, the M-MRresources refer to the M-MRresources with the corresponding number of information bits being the largest of the K-MRresources. Optionally, the M-MRresources refer to the M-MRresources of the K-MRresources that maximize the summation of the values of the number of bits. Optionally, where represents a set including the K-MRresources. Optionally, represents a set including the M-MRresources. Optionally, Optionally, is the number of bits determined based on the allowed rank and associated with the s-th resource of the M-MRresources. Optionally, is the size of the RI field determined based on the allowed rank and associated with the s-th resource of the M-MRresources. Here, Here, the M-MRresources refer to the M-MRresources in Optionally, refer above for the method of determining the corresponding number of information bits used for indicating the RI based on the allowed rank. Optionally, refer above for the method of determining the corresponding RI field size based on the allowed rank.

[0270] ● Optionally, Optionally, is the number of bits determined based on the allowed rank and associated with the m-th resource of the M-MRresources. Optionally, is the size of the RI field determined based on the allowed rank and associated with the m-th resource of the M-MRresources. Here, Optionally, the M-MRresources refer to the reported M-MRresources. Optionally, the M-MRresources refer to the M-MRresources with corresponding CSI being reported. Optionally, is the number of bits determined based on the allowed rank and associated with the m-th resource of the M-MRresources. Optionally, is the size of the RI field determined based on the allowed rank and associated with the m-th resource of the M-MRresources. Optionally, refer above for the method of determining the corresponding number of information bits used for indicating the RI based on the allowed rank. Optionally, refer above for the method of determining the corresponding RI field size based on the allowed rank.

[0271] The UE and the base station need to predefine the position where the P bits are located so that the base station can interpret the corresponding field correctly after receiving the CSI. The position where the zero-padding bits (e.g., P bits) are located are discussed below. Optionally, the zero-padding bits are added after the CSI associated with the m-th resource, and / or the zero-padding bits are added before the CSI associated with the m-th resource. Optionally, the zero-padding bits are added after CSI Part 1. Optionally, the zero-padding bits are added before CSI Part 1. Optionally, the zero-padding bits are added at the end of CSI Part 1. Optionally, the zero-padding bits are added at the beginning of CSI Part 1.

[0272] The case where the CSI includes one part (or only one part) is discussed below.

[0273] Optionally, the CSI associated with the M resources includes one CSI part. Optionally, the CSI associated with the M resources includes only one CSI part. Optionally, the CSI payload carried by the PUCCH are the same. Optionally, the CSI payload carried by the PUCCH are the same irrespective of RI and / or CRI.

[0274] Optionally, the CSI may include a CSI field (e.g., at least one of a RI field, a PMI field, a CQI field, an LI field). Optionally, when the RI restriction(s) corresponding to each of the K resources is indicated, the sizes of the RI fields corresponding to different resources may be different. In addition, when the RI restriction(s) corresponding to each of the K resources is indicated, the values of the allowed rank(s) corresponding to different resources for determining the size of the corresponding CSI field may be different. For the M-MRresources selected / reported by the UE, when different M-MRresources are selected from the K-MRresources, the sizes of the RI fields associated with the M-MRresources are different and cannot be known in advance by the base station. Therefore, the UE needs to zero-pad the reported CSI so that the payload size of the CSI is fixed regardless of which M-MRresources are selected to ensure that the base station can decode the CSI correctly.

[0275] Method #1 for a fixed payload of CSI is described below. In the following description, the description of M resources may also be applicable to M-MRresources. In the following description, the description of K resources may also be applicable to K-MRresources. It may be considered that M-MRresources may be equivalent to M resources when MR= 0 or MRresources are not configured. It may be considered that K-MR resources may be equivalent to K resources when MR= 0 or MRresources are not configured.

[0276] Optionally, the CSI associated with one / each of the M resources is zero-padded to a fixed payload size. Optionally, when a second condition is satisfied, the CSI associated with one / each of the M resources is zero-padded to a fixed payload size. Optionally, the CSI associated with the m-th ( ) resource of the M resources is zero-padded to a fixed payload size. Optionally, when the second condition is satisfied, the CSI associated with the m-th ( ) resource of the M resources is zero-padded to a fixed payload size. Optionally, the CSI associated with the m-th ( ) resource of the M resources includes zero-padding bits. Optionally, when the second condition is satisfied, the CSI associated with the m-th ( ) resource of the M resources includes zero-padding bits. Optionally, the second condition includes at least one of the followings:

[0277] ● K RI restriction(s) are configured;

[0278] ● MRresources are not configured. For example, MRresources are not configured for reporting;

[0279] ● The reported CSI includes only one part;

[0280] ● The CSI associated with the M resources is wideband CSI. For example, the CSI associated with the M resources has a wideband granularity;

[0281] ● The number of ports of a resource of the K resources is greater than 1. For example, the number of ports of each of the K resources is greater than 1;

[0282] ● The CSI associated with the M resources is carried by PUCCH.

[0283] Optionally, the CSI associated with one / each of the M resources (for example, the reported M resources) includes P bits. Optionally, the CSI of the m-th resource of the M resources includes Pmbits. Here, Optionally, the Pmbits are all 0s. Optionally, the Pmbits are the zero-padding bits. The Pmbits are consecutive bits. Optionally, Pmis determined based on a third number and a fourth number. Optionally, Pmis equal to the difference of the third number ( ) and the fourth number ( ). Optionally,

[0284] ● Optionally, the third number is determined based on the number of bits associated with each of the K resources. Optionally, the third number is determined based on the size of the CSI field(s) associated with each of the K resources. Optionally, the third number is based on the largest number of the numbers of bits associated with each of the K-MRresources. Optionally, the third number is equal to the maximum value of the sizes of the CSI field(s) associated with each of the K resources. Optionally, the third number is based on the number of bits associated with a resource of the K resources, where the number of bits associated with the resource is the largest number of the numbers of bits associated with each resource of the K resources. Here, the bits may be CSI information bits. Optionally, the size of the CSI field(s) associated with the k-th ( ) resource of the K resources is determined based on the size of the RI field determined based on the RI restriction corresponding to the k-th resource. Optionally, the size of the CSI field(s) associated with the k-th resource is equal to the summation of the size of the RI field determined based on the RI restriction corresponding to the k-th resource and the size of the CSI field(s) determined based on the value of the rank allowed to be reported indicated by the RI restriction corresponding to the k-th resource. Optionally, the size of the CSI field(s) is equal to the maximum value of the sizes of CSI field(s) where each of the CSI field(s) is determined according to corresponding allowed rank(s) indicated by the RI restriction for the k-th resource. Optionally, the CSI field(s) includes at least one of the PMI field, the CQI field and the LI field.

[0285] ● Optionally, the fourth number is the number of bits associated with the m-th resource. Optionally, the fourth number is determined based on the size of the CSI field associated with the m-th resource. Optionally, the fourth number is the number of reported bits associated with the m-th resource. Optionally, the fourth number is based on at least one of the followings: the size of the RI field corresponding to the m-th resource, and the number of bits determined based on the reported rank corresponding to / associated with the m-th resource. Optionally, the fourth number is based on at least one of the followings: the size of the RI field corresponding to the m-th resource, and the size of the CSI field determined based on the reported rank corresponding to / associated with the m-th resource. Optionally, the size of the CSI field corresponding to the m-th resource is equal to the summation of the size of the RI field determined based on the RI restriction corresponding to the m-th resource and the size of the CSI field(s) determined based on the reported rank corresponding to the m-th resource. Here, the bits may be CSI information bits. Optionally, the CSI field(s) includes at least one of the PMI field, the CQI field, and the LI field.

[0286] Optionally, the CSI information bits include at least one of the followings: information bits of the RI field, information bits of the PMI field, information bits of the CQI field, and information bits of the LI field. Optionally, the number of CSI information bits is equal to / based on the summation of the followings: the number of bits of the RI field, the number of bits of the PMI field, the number of bits of the CQI field, and the number of bits of the LI field. Optionally, the CSI field includes: at least one of a PMI field, a CQI field, and an LI field. Here, C(k) represents the number of CSI information bits corresponding to / associated with resource #k. Here, resource #k may be understood as the resource corresponding to the value k of CRI. Optionally, CRI k corresponds to resource #k+1. Optionally, C(k) = NRI(k). Optionally, C(k) = NRI(k)+ B(rk). Here, NRI(k) represents the number of bits of the RI field corresponding to / associated with resource #k. Here, B(rk) represents the number of CSI information bits determined based on rank rkcorresponding to / associated with resource #k. Optionally, rkmay be the value of the rank corresponding to resource #k. Optionally, B(rk) may be equal to the summation of at least one of the followings: NPMI(rk), NCQI(rk), NLI(rk). Optionally, B(rk) = NPMI(rk) + NCQI(rk) + NLI(rk). The meanings and determination method of the above parameters are described below.

[0287] Optionally, NRI(k) refers to the number of bits determined based on the rank corresponding to resource #k. Optionally, NRI(k) refers to the number of bits determined based on the number of allowed ranks corresponding to resource #k. Optionally, NRI(k) may be determined based on Table 1, Table 2, or Table 3. Optionally, NRI(k) = where nkrepresents the number of allowed RI values corresponding to resource #k, or refers to the number of allowed rank(s) corresponding to resource #k.

[0288] Optionally, NPMI(rk) represents the number of bits of the PMI field corresponding to / associated with resource #k. Optionally, NPMI(rk) refers to the number of bits determined based on the value rkof RI corresponding to resource #k. Optionally, when PMI is reported and / or the number of CSI-RS ports is 2, NPMI(1)=2. Optionally, when PMI is reported and / or the number of CSI-RS ports is 2, NPMI(2)=1. Optionally, when PMI is not reported and / or the number of CSI-RS ports is 2, NPMI(2)=0. Optionally, NPMI(rk) = NPMI,i1(rk) + NPMI,i2(rk). Optionally, NPMI,i1(rk) represents the number of bits associated with i1 corresponding to / associated with resource #k. Optionally, i1 is included in PMI. Optionally, NPMI,i2(rk) represents the number of bits associated with i2 corresponding to / associated with resource #k. Optionally, i2 is included in the PMI. Optionally, when PMI i1 is reported, NPMI,i1(rk) may be determined based on Table 4 or Table 5. Optionally, in Table 4 or Table 5, the rank refers to the rank (for example, rk) corresponding to / associated with resource #k. Optionally, when PMI i2 is reported, NPMI,i2(rk) may be determined based on Table 4 or Table 5. Optionally, in Table 4 or Table 5, the rank refers to the rank (for example, rk) corresponding to / associated with resource #k. Optionally, when PMI i1 is not reported, NPMI,i1(rk) = 0. Optionally, when PMI i2 is not reported, NPMI,i2(rk) = 0.

[0289] Optionally, NCQI(rk) represents the number of bits of the CQI field corresponding to / associated with resource #k. Optionally, NCQI(rk) refers to the number of bits determined based on the value rkof RI corresponding to resource #k. Optionally, NCQI(rk) may be determined based on Table 1, Table 2, or Table 3. Optionally, in Table 1, Table 2, or Table 3, the rank refers to the rank (for example, rk) corresponding to / associated with resource #k. Optionally, when CQI is reported, NCQI(rk) is determined based on Table 1, Table 2, or Table 3. Optionally, NCQI(rk) = 0. Optionally, when CQI is not reported, NCQI(rk) = 0.

[0290] Optionally, NLI(rk) represents the number of bits of the LI field corresponding to / associated with resource #k. Optionally, NLI(rk) refers to the number of bits determined based on the value rkof RI corresponding to resource #k. Optionally, NLI(rk) may be determined based on Table 1, Table 2, or Table 3. Optionally, in Table 1, Table 2, or Table 3, v refers to the rank (for example, rk) corresponding to / associated with resource #k. Optionally, when LI is reported, NLI(rk) is determined based on Table 1, Table 2, or Table 3. Optionally, NLI(rk) = 0. Optionally, when LI is not reported, NLI(rk) = 0.

[0291] Optionally, the third number refers to the maximum number of the numbers of bits corresponding to the K resource(s). Optionally, the third number is Optionally,Qrepresents the set of the K resource(s), corresponds to resource #k. Optionally,Qrepresents the set of the K resources, corresponds to the k-th resource of the K resource(s). Optionally,Qrepresents the set including CRI(s) corresponding to the K resource(s), corresponds to the value of CRI corresponding to resource #k. Optionally,Qrepresents the set including CRI(s) corresponding to the K resource(s), corresponds to the CRI corresponding to the k-th resource of the K resource(s). Optionally, Here, refers to the set of rank value(s) rkfor the k-th resource that are allowed to be reported.

[0292] Optionally, the fourth number is Optionally, Wherein refers to the reported rank for the m-th resource.

[0293] Optionally, the Pmbits determined by the above method / operation are in the RI field of the m-th resource. Optionally, the Pmbits determined by the above method / operation are after at least one of the CRI field, RI field, and LI field of the m-th resource. Optionally, if LI is not reported, the Pmbits determined by the above method / operation are after the RI field of the m-th resource. Optionally, if LI is reported, the Pmbits determined by the above method / operation are after the LI field of the m-th resource. Optionally, the Pmbits determined by the above method / operation are before the PMI field of the m-th resource. Optionally, the Pmbits determined by the above method / operation are at the last / first of the RI field of the m-th resource. Optionally, the Pmbits determined by the above method / operation are the last / first Pmbits of the RI field of the m-th resource. This method allows the base station to determine the position of the zero-padding bits and thereby determine the position of other information bits for decoding, avoiding the use of erroneous information and improving the reliability of the communication system.

[0294] Method #2 for a fixed payload of CSI is described below. In the following description, the description of M resources may also be applicable to M-MRresources. In the following description, the description of K resources may also be applicable to K-MRresources. It may be considered that M-MRresources may be equivalent to M resources when MR= 0 or MRresources are not configured.

[0295] Optionally, the CSI associated with the M resources is zero-padded to a fixed payload size. Optionally, when the second condition is satisfied, the CSI associated with the M resources is zero-padded to a fixed payload size. Optionally, the CSI associated with the M resources includes zero-padding bits. Optionally, when the second condition is satisfied, the CSI associated with the M resources includes zero-padding bits. Optionally, the second condition is as described above.

[0296] Optionally, the CSI of the M resources (e.g., the reported M resources) includes P bits. Optionally, the P bits are all 0s. Optionally, the values of the P bits are all 0s. Optionally, the P bits are zero-padding bits. Optionally, P is determined based on the seventh number and the eighth number. Optionally, P is equal to the difference of the seventh number ( ) and the eighth number ( ). Optionally,

[0297] ● Optionally, the seventh number is determined based on the number of bits associated with each of the K resources. Optionally, the seventh number is determined based on M sizes of the CSI fields of the sizes of the CSI fields associated with each of the K resources. Optionally, the seventh number is based on M maximum values from the values of the number of bits determined by each of the K resources. Optionally, the seventh number is equal to the maximum value of the summation of the M sizes of the CSI fields of the sizes of the CSI fields associated with each of the K resources. Optionally, the seventh number is equal to the maximum value of the summation of any M sizes of the CSI fields of the sizes of the CSI fields associated with each of the K resources. Optionally, the seventh number is based on M values from the values of the number of bits associated with each of the K resources such that the M values are the maximum. Optionally, the seventh number is based on the summation of the number of bits associated with the M resources of the K resources, where the value of the number of bits associated with the M resources is the largest M of the values of the number of bits associated with each of the K resources. Optionally, the seventh number is determined based on (or equal to) the summation of the M sizes of the CSI fields of the sizes of the CSI fields associated with each of the K resources. Here, the bits may be CSI information bits. Optionally, the size of the CSI field associated with the k-th ( ) resource of the K resources is determined based on the size of the RI field determined based on the RI restriction corresponding to the k-th resource. Optionally, the size of the CSI field associated with the k-th resource is equal to the summation of the size of the RI field determined based on the RI restriction corresponding to the k-th resource and the size of the CSI field determined based on the value of the rank allowed to be reported indicated by the RI restriction corresponding to the k-th resource. Optionally, the size of the CSI field is equal to the maximum value of the sizes of the CSI fields determined based on the value of each allowed reported rank indicated by the RI restriction corresponding to the k-th resource. Optionally, the CSI field includes at least one of a PMI field, a CQI field, and an LI field.

[0298] ● Optionally, the eighth number is the number of bits associated with the M resources. Optionally, the eighth number is the number of reported bits associated with the M resources. Optionally, the eighth number is the summation of the numbers of bits associated with the M resources. Optionally, the eighth number is the summation of the numbers of the reported bits associated with each of the M resources. Here, the bits may be CSI information bits. Optionally, the eighth number is determined based on the size of the CSI field corresponding to the M resources. Optionally, the eighth number is equal to the summation of the sizes of the CSI fields corresponding to the M resources. Optionally, the size of the CSI field corresponding to the m-th ( ) resource of the M resources is equal to the summation of the size of the RI field determined based on the RI restriction corresponding to the m-th resource and the size of the CSI field determined based on the reported rank corresponding to the m-th resource.

[0299] Optionally, the CSI information bits include at least one of the followings: information bits of the RI field, information bits of the PMI field, information bits of the CQI field, and information bits of the LI field. Optionally, the number of CSI information bits is equal to / based on the summation of the followings: the number of bits of the RI field, the number of bits of the PMI field, the number of bits of the CQI field, and the number of bits of the LI field. Optionally, the CSI field includes: at least one of the PMI field, the CQI field, and the LI field. Here, C(k) represents the number of CSI information bits corresponding to / associated with resource #k. Here, resource #k may be understood as the resource corresponding to the value k of CRI. Optionally, CRI k corresponds to resource #k+1. Optionally, C(k) = NRI(k). Optionally, C(k) = NRI(k)+ B(rk). Here, NRI(k) represents the number of bits of the RI field corresponding to / associated with resource #k. Here, B(rk) represents the number of CSI information bits determined based on rank rkcorresponding to / associated with resource #k. Optionally, rkmay be the value of the rank corresponding to resource #k. Optionally, B(rk) may be equal to the summation of at least one of the followings: NPMI(rk), NCQI(rk), NLI(rk). Optionally, B(rk) = NPMI(rk) + NCQI(rk) + NLI(rk). Refer above for the description method of each parameter.

[0300] Optionally, the seventh number refers to the summation of the largest M numbers of the numbers of bits corresponding to the K resources. Optionally, the seventh number is Optionally, Q represents the set including the K resources, and T represents the set including the M resources. Optionally, Q represents the set including CRIs corresponding to the K resources, and T represents the set including CRIs corresponding to the M resources. Optionally, Optionally, j refers to the j-th resource in the set T. Optionally, j refers to the j-th CRI in the set T. Optionally, Here, may refer to the number of bits corresponding to resource j. Here, may refer to the number of bits corresponding to the j-th resource. Here, may refer to the size of the related CSI field corresponding to resource j. Optionally, Here, refers to the set of rank values rjfor the j-th resource that are allowed to be reported.

[0301] Optionally, the eighth number is Optionally, Wherein refers to the reported rank for the i-th resource. Here, the i-th resource refers to the i-th resource of the M resources. Optionally,

[0302] Optionally, the P bits determined by the above method / operation are before / after the CSI of the M resources. Optionally, the P bits determined by the above method / operation are at the last / first of the CSI of the M resources. Optionally, the P bits determined by the above method / operation are the last / first P bits of the CSI of the M resources. This method allows the base station to determine the positions of the P bits and thereby determine the positions of other information bits for decoding, avoiding the use of erroneous information and improving the reliability of the communication system.

[0303] Optionally, the size of the CSI field included in the CSI may be determined based on one of the following Tables.

[0304]

[0305] Optionally, when the parameter codebookType = typeI-SinglePanel is satisfied, or the report quantity parameter reportQuantity is set to 'CRI-RI-CQI', or there is one CSI-RS port, the number of bits of RI / LI / CQI / CRI is determined by Table 1.

[0306] Optionally, in Table 1, represents the number of one or more resources in the resource set. In Table 1, represents the number of allowed RI values. refers to the value of rank. The values of the rank indicator field are mapped to allowed rank indicator values with increasing order, where '0' is mapped to the smallest allowed rank indicator value. For higher layer parameterreportQuantityset to 'cri-RI-CQI', the values of the rank indicator field are mapped to rank indicator values with increasing order, where '0' is mapped to rank-1.

[0307]

[0308] Optionally, when the parameter codebookType = typeI-MultiPanel is satisfied, the number of bits of RI / LI / CQI / CRI is determined by Table 2.

[0309] Optionally, in Table 2, represents the number of one or more resources in the resource set. In Table 2, represents the number of allowed RI values.vrefers to the value of rank. The values of the rank indicator field are mapped to allowed rank indicator values with increasing order, where '0' is mapped to the smallest allowed rank indicator value.

[0310]

[0311] Optionally, when the parameter codebookType = typeII-r16 or typeII-PortSelection-r16 or typeII-PortSelection is satisfied, the number of bits of RI may be determined by Table 3. In Table 3, represents the number of allowed RI values.

[0312]

[0313]

[0314] Optionally, when the number of ports (the number of CSI-RS ports) is equal to 1, the bitwidth of PMI is 0. When the number of ports (the number of CSI-RS ports) is equal to 2, the rank is 1, and the parameter codebookType=typeI-SinglePanel is satisfied, the bitwidth of PMI is 2. Optionally, the rank here refers to the rank included / reported in CSI. When the number of ports (the number of CSI-RS ports) is equal to 2, the rank is 2, and the parameter codebookType=typeI-SinglePanel is satisfied, the bitwidth of PMI is 1. Optionally, the rank here refers to the rank included / reported in CSI. When the number of ports (the number of CSI-RS ports) is greater than 2 and the parameter codebookType=typeI-SinglePanel is satisfied, the bitwidth of PMI may be provided / represented by Table 4.

[0315]

[0316]

[0317] Optionally, when the number of ports (the number of CSI-RS ports) is equal to 1, the bitwidth in PMI is 0. When the parameter codebookType=typeI-MultiPanel is satisfied, the bitwidth of PMI may be determined by Table 5.

[0318] FIG. 5 illustrates a method 500 performed by a base station according to various embodiments of the disclosure. The method 510 includes at 510, the base station transmits a CSI reporting configuration to the UE, where the CSI reporting configuration indicates a resource set for channel measurement including K resources, at 520, 1) (when MRresources of the K resources are configured for reporting,) the base station receives CSI associated with the MRresources and CSI associated with M-MRresources based on the CSI reporting configuration from the UE (or the base station receives CSI from the UE, the CSI includes CSI associated with the MRresources and CSI associated with the M-MRresources), where the M and MRresources are indicated by the CSI reporting configuration, and the M-MRresources are from K-MRresources of the K resources other than MRresources, where in case that the received CSI includes CSI Part 1 and CSI Part 2 and the CSI reporting configuration indicates that each of the K resources corresponds to a RI restriction: CSI Part 1 associated with the m-th ( ) resource of the M-MRresources is zero-padded to a fixed payload size, or CSI Part 1 associated with the M-MRresources is zero-padded to a fixed payload size; or 2) (when MRresources are not configured for reporting,) the base station receives CSI associated with M resources based on the CSI reporting configuration from the UE (or the base station receives CSI including CSI associated with the M resources from the UE), where M is indicated by the CSI reporting configuration, and the M resources are from the K resources, where in the case where the CSI associated with M resources is carried by PUCCH and has a wideband frequency domain granularity, and the CSI reporting configuration indicates that each of the K resources corresponds to a RI restriction: i) CSI associated with the m-th ( ) resource of the M resources includes zero-padding bits, where the number of the zero-padding bits is determined based on the difference of a third number and a fourth number, where the third number is determined based on the size of the CSI field associated with each of the K resources and determined based on the corresponding RI restriction, and the fourth number is determined based on the size of the CSI field associated with the m-th resource, or ii) the CSI associated with the M resources includes zero-padding bits, where the number of the zero-padding bits is determined based on the difference of a seventh number and an eighth number, where the seventh number is determined based on the summation of M sizes of the CSI fields of sizes of the CSI fields associated with each of the K resources and the eighth number is determined based on the summation of sizes of CSI fields corresponding to the M resources.

[0319] FIG. 6 illustrates a structure 600 of a user equipment according to various embodiments of the disclosure. As shown in FIG. 6, the user equipment 600 includes a controller 610 and a transceiver 620, where the controller 610 is configured to perform various methods disclosed herein as performed by the user equipment, and the transceiver 620 is configured to transmit and receive channels or signals.

[0320] FIG. 7 illustrates a structure 700 of a base station according to various embodiments of the disclosure. As shown in FIG. 7, the network device 700 includes a controller 710 and a transceiver 720, where the controller 710 is configured to perform various methods disclosed herein as performed by the network device, and the transceiver 720 is configured to transmit and receive channels or signals.

[0321] FIG. 8 is a block diagram of a terminal or user equipment (UE) 800 according to an embodiment of the disclosure.

[0322] The terminal is an electronic device capable of wireless communication, may include a User Equipment (UE), a portable phone, a smartphone, a tablet, an Internet of things (IoT) device, etc., having various form factors, and may perform wireless communication with a base station (BS) through a wireless channel.

[0323] Referring to FIG. 8, the UE 800 may include at least one transceiver (hereinafter, referred to as simply “transceiver”) 801, at least one processor (hereinafter, referred to as simply “processor”) 802, and at least one memory (hereinafter, referred to as simply “memory”) 803. According to at least one or a combination of methods corresponding to the embodiments described in the present disclosure, the transceiver 801, the processor 802, and the memory 803 of the UE 800 may operate. However, components of the UE 800 are not limited to the exemplary components illustrated in FIG. 8. In another embodiment, the UE 800 may further include additional components in addition to the above-mentioned components, or some components may be omitted. Further, in some embodiments, any combination of the transceiver 801, the processor 802, or the memory 803 may be integrated in the form of one component.

[0324] The transceiver 801 may be a communication circuit or communication circuitry that enables the UE 800 to perform wireless communication with a node or an entity of a network. For example, the transceiver 801 may enable the UE 800 to transmit or receive a signal to or from a BS through cellular communication, or to transmit or receive a signal to or from another UE through cellular communication. For example, the transceiver 801 may support at least one of various cellular communication technologies including 3rd generation (3G), 4th generation (4G), long term evolution (LTE), 5th generation (5G) NR, 6th generation (6G), and various cellular wireless communication technologies supported by the transceiver (801) may include all subsequent generations of evolved wireless communications.

[0325] According to an embodiment, the UE 800 may include a plurality of transceivers. For example, in the case of supporting evolved-universal terrestrial radio access-new radio (E-UTRA-NR) dual connectivity (EN-DC), the UE 800 may include a first transceiver supporting the 4G LTE wireless communication and a second transceiver supporting the 5G NR wireless communication. According to another embodiment, in the case of supporting NR-dual connectivity (NR-DC), the UE 800 may include a plurality of transceivers supporting the 5G NR wireless communication. According to still another embodiment, in the case of supporting near field wireless communication, the UE 800 may separately include a transceiver supporting at least one standard in the group of wireless communication protocol standards as defined in the protocol standards for Bluetooth®, wireless local area network (WLAN) network (including institute of electrical and electronics engineers (IEEE) 802.11-2016 standard or its amendments, e.g., 802.11ah, 802.11ad, 802.11ay, 802.11ax, 802.11az, 802.11ba, and 802.11be, without being limited thereto).

[0326] According to an embodiment, the transceiver 801 may include various circuit structures used to transmit or receive signals to or from a BS through a wireless channel. The signals may include control information and data. For example, the transceiver 801 may include a radio frequency (RF) transmitter for up-converting and amplifying the frequency of a transmitted signal and an RF receiver for low-noise-amplifying a received signal and down-converting the frequency thereof. The transceiver 801 may output a signal received through a wireless channel to the processor 802 and may transmit, through a wireless channel, a signal output from the processor 802.

[0327] The processor 802 may control general operations of the UE 800 according to embodiments of the disclosure. The processor 802 may be implemented by one or more integrated circuit (or circuitry) (IC) chips and may execute various data processings. The processor 802 may include at least one electric circuit, and may execute instructions (or a program, codes, data, etc.) stored in the memory 803, individually, collectively or in any combination thereof. Further, the processor 802 may include a single-core processor or multi-core processor, and may include a processor assembly including a plurality of processing circuits (circuitry) according to a specific implementation scheme.

[0328] The processor 802 may be electrically, operatively, or communicatively coupled to the transceiver 801 to control the transceiver 801.

[0329] The processor 802 may include at least one processor (or processing circuitry), and the at least one processor may perform the following operations individually, collectively or in any combination thereof. For example, the processor 802 may include a communication processor (CP) configured to control communication operations and an application processor (AP) configured to control execution of an upper layer (for example, an application layer). In a specific embodiment, at least a part of the processor 802 may be included in one chip and the other part of the processor 802 may be included in another chip. Otherwise, at least one processor may be included in another component, for example, the transceiver 801 or the memory 803.

[0330] The processor 802 may perform or control or cause an operation of the UE 800 for executing at least one or a combination of methods according to embodiments of the disclosure. For example, the processor 802 may control operations of the UE 800 for processing a downlink signal received from a BS or generating and transmitting an uplink signal to a BS. To this end, the processor 802 may execute a computer program, codes, or instructions stored in the memory 803, so as to control other components of the UE 800 to enable execution of various operations.

[0331] The memory 803 corresponds to a hardware storage device capable of temporarily or permanently storing information and may include one or more storage media. For example, the memory 803 may include a memory assembly including one or more storage media. For example, the one or more storage media may include permanent memory, such as a hard drive, flash memory, or read-only memory (ROM), semipermanent memory, such as random access memory (RAM), cache memory, or a combination thereof.

[0332] The memory 803 may be electrically, operatively, or communicatively coupled to the processor 802 and may be accessed by the processor 802.

[0333] The memory 803 may store a computer program, codes, or instructions executable by the processor 802. According to an embodiment, a computer program, codes, or instructions executable by the processor 802 may be either stored in a single memory device or separated and distributedly stored in two or more memory devices. By executing the instructions stored in the memory 803, the processor 802 may perform various functions according to an embodiment of the disclosure.

[0334] According to an embodiment of the disclosure, operations of the UE 800 may be caused to be performed based on execution of instructions (or a computer program or codes) stored in the memory 803 by at least one processor (or processing circuitry) configured to execute the same individually, collectively, or in any combination thereof, based on processing circuitry that is not configured to execute instructions, and / or based on components of processing circuitry that is not configured to execute instructions.

[0335] FIG. 9 is a block diagram of a base station (BS) 900 according to an embodiment of the disclosure.

[0336] The BS 900 may perform wireless communication with at least one user equipment (UE) located within the area of the BS 900 through a wireless channel.

[0337] Referring to FIG. 9, the BS 900 may include at least one transceiver (hereinafter, referred to as simply “transceiver”) 901, at least one processor (hereinafter, referred to as simply “processor”) 902, and at least one memory (hereinafter, referred to as simply “memory”) 903. According to at least one or a combination of methods corresponding to the embodiments described in the present disclosure, the transceiver 901, the processor 902, and the memory 903 of the BS 900 may operate. However, components of the BS 900 are not limited to the exemplary components illustrated in FIG. 9. In another embodiment, the BS 900 may further include additional components in addition to the above-mentioned components, or some components may be omitted. Further, in some embodiments, any combination of the transceiver 901, the processor 902, or the memory 903 may be integrated in the form of one component.

[0338] The transceiver 901 may be a communication circuit or communication circuitry that enables the BS 900 to perform wireless communication with a node or an entity of a network. For example, the transceiver 901 may enable the BS 900 to transmit or receive a signal to or from the UE 800 through cellular communication, or to transmit or receive a signal to or from another network entity through wireless communication. For example, the transceiver 901 may support various cellular communication technologies including 3rd generation (3G), 4th generation (4G), long term evolution (LTE), 5th generation (5G) NR, 6th generation (6G), and various cellular wireless communication technologies supported by the transceiver (901) may include all subsequent generations of evolved wireless communications. According to an embodiment, the transceiver 901 may include various circuit structures used to transmit or receive signals to or from a UE through a wireless channel. The signals may include control information and data. For example, the transceiver 901 may include a radio frequency (RF) transmitter for up-converting and amplifying the frequency of a transmitted signal and an RF receiver for low-noise-amplifying a received signal and down-converting the frequency thereof. The transceiver 901 may output a signal received through a wireless channel to the processor 902 and may transmit, through a wireless channel, a signal output from the processor 902.

[0339] Meanwhile, according to an embodiment of the present disclosure, the BS 900 may perform communication with a node or an entity of a network through wired or wireless communication. For example, the BS 900 may perform wired or wireless communication with an adjacent BS, or a node or an entity of a core network through a backhaul network. Although not illustrated in FIG. 9, when the BS 900 performs wired communication, the BS 900 may further include a separate network interface for wired communication in addition to the transceiver 901. The network interface may be referred to as network interface circuitry or communication interface circuitry.

[0340] The processor 902 may control general operations of the BS 900 according to embodiments of the disclosure. The processor 902 may be implemented by one or more integrated circuit (or circuitry) (IC) chips and may execute various data processings. The processor 902 may include at least one electric circuit, and may execute instructions (or a program, codes, data, etc.) stored in the memory 903, individually, collectively or in any combination thereof. Further, the processor 902 may include a single-core processor or multi-core processor, and may include a processor assembly including a plurality of processing circuits (circuitry) according to a specific implementation scheme.

[0341] The processor 902 may be electrically, operatively, or communicatively coupled to the transceiver 901 to control the transceiver 901.

[0342] The processor 902 may include at least one processor (or processing circuitry), and the at least one processor may perform the following operations individually, collectively or in any combination thereof. In a specific embodiment, at least a part of the processor 902 may be included in one chip and the other part of the processor 902 may be included in another chip. Otherwise, at least one processor may be included in another component, for example, the transceiver 901 or the memory 903.

[0343] The processor 902 may perform or control or cause an operation of the BS 900 for executing at least one or a combination of methods according to embodiments of the disclosure. For example, the processor 902 may control operations of the BS 900 for generating and transmitting a downlink signal to a UE or processing an uplink signal received from a UE. Otherwise, the BS 900 may transmit or receive a signal to or from a neighboring BS, transfer a signal received from a UE to an upper node of the network, or transmit a signal transferred from an upper node of the network to a UE. To this end, the processor 902 may execute a computer program, codes, or instructions stored in the memory 903, so as to control other components of the BS 900 to enable execution of various operations.

[0344] The memory 903 corresponds to a hardware storage device capable of temporarily or permanently storing information and may include one or more storage media. For example, the memory 903 may include a memory assembly including one or more storage media. For example, the one or more storage media may include permanent memory, such as a hard drive, flash memory, or read-only memory (ROM), semipermanent memory, such as random access memory (RAM), cache memory, or a combination thereof.

[0345] The memory 903 may be electrically, operatively, or communicatively coupled to the processor 902 and may be accessed by the processor 902.

[0346] The memory 903 may store a computer program, codes, or instructions executable by the processor 902. According to an embodiment, a computer program, codes, or instructions executable by the processor 902 may be either stored in a single memory device or separated and distributedly stored in two or more memory devices. By executing the instructions stored in the memory 903, the processor 902 may perform various functions according to an embodiment of the disclosure.

[0347] According to an embodiment of the disclosure, operations of the BS 900 may be caused to be performed based on execution of instructions (or a computer program or codes) stored in the memory 903 by at least one processor (or processing circuitry) configured to execute the same individually, collectively, or in any combination thereof, based on processing circuitry that is not configured to execute instructions, and / or based on components of processing circuitry that is not configured to execute instructions.

[0348] The UE or the base station may perform various communication procedures related to the control plane or the user plane by cooperating with one or more network entities based on wireless communication. For example, the UE may communicate with network entity such as an Access and Mobility Management Function (AMF) or a Session Management Function (SMF) via the base station, or the base station may perform at least one communication procedure by directly transmitting and receiving signals to / from, or relaying signals between, the network entities.

[0349] The structure of the above-described network entity will be described in more detail with reference to the drawings.

[0350] FIG. 10 is a block diagram of a network entity 1000 according to an embodiment of the disclosure.

[0351] The network entity 1000 may include an entity (apparatus, device, or server, etc.) that performs one or more network functions (NFs) or a part of a network function constituting a core network (e.g., a 5th generation (5G) core (5GC)) in a communication system. In this case, multiple NFs may be implemented within a single network entity, or a single NF may be distributed and implemented across a plurality of network entities. In addition, when an NF is implemented within the network entity, the NF may be implemented in the form of software, and in such a case, a program for operating the NF may be stored in memory of the network entity 1000.

[0352] A single NF may be implemented by one or more instances, which may be deployed on the same network entity or distributed across multiple network entities to operate. The instance may be a software unit that logically executes a specific network function, and may be implemented in a form that is decoupled from physical hardware resources. Further, one or more NFs may be implemented in the form of one network slice to operate to satisfy specifications required by a particular service.

[0353] The NF may include at least one of an access and mobility management function (AMF), a session management function (SMF), a local session management function (L-SMF), a user plane function (UPF), a local user plane function (L-UPF), a policy control function (PCF), a unified data management (UDM), a unified data repository (UDR), a network exposure function (NEF), a network repository function (NRF), an application function (AF), a network slice selection function (NSSF), a network data analytics function (NWDAF), a network slice admission control function (NSACF), an authentication server function (AUSF), or a data network (DN).

[0354] Referring to FIG. 10, the network entity 1000 may include at least one network interface 1001, at least one processor 1002 (hereinafter, “processor”), and at least one memory 1003 (hereinafter, “memory”). As described above, a NF may be implemented in the form of a physical device such as the network entity 1000, or may be virtualized and executed in the form of an instance. When implemented as an instance, the NF need not necessarily include physical components as illustrated in FIG. 10. In such a case, the instance may be logically represented as comprising one or more logical functional elements.

[0355] According to at least one or a combination of methods corresponding to the embodiments described in the present disclosure, the network interface 1001, the processor 1002, and the memory 1003 of the network entity 1000 may operate. However, components of the network entity 1000 are not limited to the exemplary components illustrated in FIG. 10. In another embodiment, the network entity 1000 may further include additional components in addition to the above-mentioned components, or some components may be omitted. Further, in an embodiment, the network interface 1001, the processor 1002, or the memory 1003 may be integrated in the form of one component.

[0356] The network interface 1001 is a collective term for a transmitter part of the network entity 1000 and a receiver part of the network entity 1000, and may be a communication circuit for transmitting or receiving a signal to or from a user equipment (UE), a base station (BS), or another network entity. Here, the communication circuit may include both a communication circuit for wireless communication and a communication circuit for a wired communication. For example, the network interface 1001 may include a circuit, logic, hardware, etc., configured to exchange a control plane message or a user plane message with a UE, a BS, or other core network entities through wireless communication or wired communication. The network interface 1001 may operate using various protocols (e.g., non-access stratum (NAS) protocol). The network interface 1001 may also be referred to, for convenience of description or depending on implementation, as communication circuitry, network interface circuitry, or a communication interface circuitry.

[0357] The processor 1002 may control general operations of the network entity 1000 according to embodiments of the disclosure. The processor 1002 may be implemented by one or more integrated circuit (or circuitry) (IC) chips and may execute various data processings. The processor 1002 may include at least one electric circuit, and may execute instructions (or a program, codes, data, etc.) stored in the memory 1003, individually, collectively or in any combination thereof. Further, the processor 1002 may include a single-core processor or multi-core processor, and may include a processor assembly including a plurality of processing circuits (circuitry) according to a specific implementation scheme. Further, it should be noted that, according to another embodiment, in a case where NF is implemented in the form of an instance, the network function may be not necessarily configured by physical hardware.

[0358] According to an embodiment, the processor 1002 may be electrically, operatively, or communicatively coupled to the network interface 1001 to control the network interface 1001.

[0359] The processor 1002 may include at least one processor (or processing circuitry), and the at least one processor may perform the following operations individually, collectively or in any combination thereof. In a specific embodiment, at least a part of the processor 1002 may be included in one chip and the other part of the processor 1002 may be included in another chip. Otherwise, at least one processor may be included in another component, for example, the network interface 1001 or the memory 1003.

[0360] The processor 1002 may perform or control or cause an operation of the network entity 1000 for executing at least one or a combination of methods according to embodiments of the disclosure. For example, the processor 1002 may control operations of the network entity 1000 for exchanging a control plane message or a user plane message with a UE, a BS, or other core network entities through wireless or wired communication, using various protocols (e.g., NAS protocol). To this end, the processor 1002 may execute a computer program, codes, or instructions stored in the memory 1003, so as to control other components of the network entity 1000 to enable execution of various operations.

[0361] The memory 1003 corresponds to a hardware storage device capable of temporarily or permanently storing information and may include one or more storage media. For example, the memory 1003 may include a memory assembly including one or more storage media. For example, the one or more storage media may include permanent memory, such as a hard drive, flash memory, or read-only memory (ROM), semipermanent memory, such as random access memory (RAM), cache memory, or a combination thereof.

[0362] The memory 1003 may be electrically, operatively, or communicatively coupled to the processor 1002 and may be accessed by the processor 1002.

[0363] The memory 1003 may store a computer program, codes, or instructions executable by the processor 1002. According to an embodiment, a computer program, codes, or instructions executable by the processor 1002 may be either stored in a single memory device or separated and distributedly stored in two or more memory devices. By executing the instructions stored in the memory 1003, the processor 1002 may perform various functions according to an embodiment of the disclosure.

[0364] According to an embodiment of the disclosure, operations of the network entity 1000 may be caused to be performed based on execution of instructions (or a computer program or codes) stored in the memory 1003 by at least one processor (or processing circuitry) configured to execute the same individually, collectively, or in any combination thereof, based on processing circuitry that is not configured to execute instructions, and / or based on components of processing circuitry that is not configured to execute instructions.

[0365] Meanwhile, although specific embodiments of the present disclosure have been described in detail, various modifications may be made without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure should not be limited to the described embodiments, but should be defined by the claims and equivalents thereof.

[0366] Furthermore, “at least one entry / at least one” described in the disclosure includes any and / or all possible combinations of the listed items, and various embodiments and various examples of the embodiments described in the disclosure may be used in any appropriate form changes and combinations, and “ / ” described in the disclosure means “or”.

[0367] The various illustrative logical blocks, modules, and circuits described in the disclosure may be implemented or performed with a general purpose processor a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor but in the alternative, the processor may be any conventional processor controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0368] The steps of a method or algorithm described in the disclosure may be embodied directly in hardware, in a software module executed by a processor in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.

[0369] In one or more exemplary designs, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. Storage media may be any available media that can be accessed by a general purpose or special purpose computer.

[0370] The description set forth herein, in connection with the appended drawings, describes example configurations, methods, and apparatuses and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “example” used herein means “serving as an example, instance, or illustration” and not “preferred” or “advantageous over other examples”. The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

[0371] While this specification contains many specific implementation details, these should not be construed as limitations on the scope of any inventions or of what may be claimed, but rather as descriptions of features specific to particular embodiments of particular inventions. Certain features that are described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variant of a subcombination.

[0372] It is to be understood that the specific order or hierarchy of steps in the methods of the disclosure is an illustration of exemplary processes. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the methods may be rearranged to achieve the functions and effects disclosed herein. The accompanying method claims present elements of the various steps in a sample order, and are not meant to be limited to the specific order or hierarchy presented unless specifically recited therein. Furthermore, although elements may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated. Accordingly, the disclosure is not limited to illustrated examples and any means for performing the functionality described herein are included in aspects of the disclosure.

[0373] The text and drawings are provided as examples only to help readers understand the disclosure. They are not intended and should not be interpreted as limiting the scope of the disclosure in any way. Although certain embodiments and examples have been provided, based on the content disclosed herein, it is obvious to those skilled in the art that modifications to the illustrated embodiments and examples can be made without departing from the scope of the disclosure.

Claims

1.A method performed by a user equipment (UE) in a wireless communication system, the method comprising:receiving, from a base station, a channel state information (CSI)-reference signal (RS) resource set configuration configuring a plurality of CSI-RS resources;receiving, from the base station, a CSI report configuration including a value for a number of at least one CSI-RS resource; andtransmitting, to the base station, a CSI report including at least one CSI for each of the at least one CSI-RS resource,wherein a number of the plurality of CSI-RS resources is equal to or more than the number of the at least one CSI-RS resource.2.The method of claim 1, wherein the CSI report includes CSI fields in order of a layer indicator (LI) field of a CSI-RS resource, zero padding bits for the CSI-RS resource, and a precoding matrix indicator (PMI) field of the CSI-RS resource.3.The method of claim 1,wherein a number of the zero padding bits for the CSI-RS is determined according to a first value and a second value,wherein the first value is associated with a maximum size of a CSI field for the at least one CSI, andwherein the second value is associated with a reported rank for the CSI field.4.The method of claim 1,wherein the at least one CSI is included in a PUCCH, andwherein the at least one CSI is associated with a wideband CSI.5.A method performed by a base station in a wireless communication system, the method comprising:transmitting, to a user equipment (UE), a channel state information (CSI)-reference signal (RS) resource set configuration configuring a plurality of CSI-RS resources;transmitting, to the UE, a CSI report configuration including a value for a number of at least one CSI-RS resource; andreceiving, from the UE, a CSI report including at least one CSI for each of the at least one CSI-RS resource,wherein a number of the plurality of CSI-RS resources is equal to or more than the number of the at least one CSI-RS resource.6.The method of claim 5, wherein the CSI report includes CSI fields in order of a layer indicator (LI) field of a CSI-RS resource, zero padding bits for the CSI-RS resource, and a precoding matrix indicator (PMI) field of the CSI-RS resource.7.The method of claim 5,wherein a number of the zero padding bits for the CSI-RS is determined according to a first value and a second value,wherein the first value is associated with a maximum size of a CSI field for the at least one CSI, andwherein the second value is associated with a reported rank for the CSI field.8.The method of claim 5,wherein the at least one CSI is included in a PUCCH, andwherein the at least one CSI is associated with a wideband CSI.9.A user equipment (UE) comprising:at least one transceiver;at least one processor communicatively coupled to the at least one transceiver; andat least one memory, communicatively coupled to the at least one processor, storing instructions executable by the at least one processor individually or in any combination to cause the UE to:receive, from a base station, a channel state information (CSI)-reference signal (RS) resource set configuration configuring a plurality of CSI-RS resources,receive, from the base station, a CSI report configuration including a value for a number of at least one CSI-RS resource, andtransmit, to the base station, a CSI report including at least one CSI for each of the at least one CSI-RS resource,wherein a number of the plurality of CSI-RS resources is equal to or more than the number of the at least one CSI-RS resource.10.The UE of claim 9, wherein the CSI report includes CSI fields in order of a layer indicator (LI) field of a CSI-RS resource, zero padding bits for the CSI-RS resource, and a precoding matrix indicator (PMI) field of the CSI-RS resource.11.The UE of claim 9,wherein a number of the zero padding bits for the CSI-RS is determined according to a first value and a second value,wherein the first value is associated with a maximum size of a CSI field for the at least one CSI, andwherein the second value is associated with a reported rank for the CSI field.12.The UE of claim 9,wherein the at least one CSI is included in a PUCCH, andwherein the at least one CSI is associated with a wideband CSI.13.A base station comprising:at least one transceiver;at least one processor communicatively coupled to the at least one transceiver; andat least one memory, communicatively coupled to the at least one processor, storing instructions executable by the at least one processor individually or in any combination to cause the base station to:transmit, to a user equipment (UE), a channel state information (CSI)-reference signal (RS) resource set configuration configuring a plurality of CSI-RS resources,transmit, to the UE, a CSI report configuration including a value for a number of at least one CSI-RS resource, andreceive, from the UE, a CSI report including at least one CSI for each of the at least one CSI-RS resource,wherein a number of the plurality of CSI-RS resources is equal to or more than the number of the at least one CSI-RS resource.14.The base station of claim 13, wherein the CSI report includes CSI fields in order of a layer indicator (LI) field of a CSI-RS resource, zero padding bits for the CSI-RS resource, and a precoding matrix indicator (PMI) field of the CSI-RS resource.15.The base station of claim 13,wherein a number of the zero padding bits for the CSI-RS is determined according to a first value and a second value,wherein the first value is associated with a maximum size of a CSI field for the at least one CSI, andwherein the second value is associated with a reported rank for the CSI field.

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