Method for reporting channel state information in a wireless communication system and apparatus therefor

Abstract

The present disclosure provides a method for reporting channel state information (CSI) in a wireless communication system and an apparatus thereof. Specifically, the present invention provides a method for reporting CSI by a user equipment (UE) via a physical uplink shared channel (PUSCH) in a wireless communication system, the method comprising the steps of: receiving configuration information from a base station (BS), wherein the configuration information comprises (i) CSI-related configuration and (ii) configuration related to transmission power control of the PUSCH; receiving a CSI reference signal (CSI-RS) from the BS based on the CSI-related configuration; calculating CSI based on the CSI-RS, wherein the CSI comprises information related to coefficients, elements of the information related to coefficients are classified into a plurality of groups based on their priority values, and the priority values have an ascending order, wherein a reference is made to a predefined specific index, higher and lower index orders of frequency domain index related to elements are alternately ordered; and transmitting, to the BS via the PUSCH, a CSI report configured by omitting a part of the plurality of groups based on the priority of the predetermined plurality of groups, wherein a transmission power of the PUSCH is determined based on the configuration information.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system, and more particularly, to a method for reporting channel state information considering a payload of the channel state information and a device for supporting the method. Background Art

[0002] Mobile communication systems have been developed to ensure user mobility while providing voice services. Mobile communication systems are expanding their services from voice only to data. The current surge in data traffic is depleting resources, and user demand for higher data rate services is leading to the need for more advanced mobile communication systems.

[0003] Next-generation mobile communication systems need to meet requirements such as handling explosively increasing data traffic, significantly increasing per-user transmission rates, operating with a large number of connected devices, and supporting very low end-to-end latency and high energy efficiency. To this end, various research efforts are underway on various technologies such as dual connectivity, massive multiple-input multiple-output (MIMO), in-band full-duplex, non-orthogonal multiple access (NOMA), ultra-wideband support, and device networking. Summary of the Invention

[0004] Technical issues

[0005] The present disclosure proposes a method for reporting channel state information (CSI) in a wireless communication system.

[0006] Specifically, the present disclosure considers the payload of channel state information (CSI) and proposes a method of omitting a portion of the CSI when the size of the payload of the channel state information is larger than the resource capacity allocated for the CSI.

[0007] In addition, the present disclosure proposes a method for determining the priority of CSI parameters to perform omission of a portion of channel state information.

[0008] In addition, the present disclosure proposes a method of reporting CSI by configuring the CSI into a first part and a second part.

[0009] In addition, the present disclosure proposes a method for transmitting channel state information based on PUSCH power control.

[0010] The technical problems to be solved by the present disclosure are not limited to the above-mentioned technical problems, and those skilled in the art to which the present disclosure belongs can clearly understand other technical problems not mentioned above from the following description.

[0011] Technical Solution

[0012] In the present disclosure, a method for reporting channel state information (CSI) by a user equipment (UE) through a physical uplink shared channel (PUSCH) in a wireless communication system, the method comprising: receiving configuration information from a base station, wherein the configuration information includes (i) a CSI-related configuration and (ii) a configuration related to transmission power control of the PUSCH; receiving a CSI reference signal (CSI-RS) from the base station based on the CSI-related configuration; calculating CSI based on the CSI-RS, wherein the CSI includes information related to a coefficient, wherein each element of the information related to the coefficient is classified into multiple groups based on a priority value, and wherein the priority value increases in an order in which higher indices and lower indices of indices of frequency domains related to the elements are sequentially crossed based on a predefined specific index; and sending a CSI report configured by omitting part of the multiple groups among the multiple groups based on predefined priorities of the multiple groups to the base station through the PUSCH, wherein the transmission power of the PUSCH is determined based on the configuration information.

[0013] Furthermore, in the present disclosure, the priority value is determined based on i) a layer index, ii) an index of a spatial domain associated with each element, and iii) an index of a frequency domain associated with each element.

[0014] Furthermore, in the present disclosure, the smaller the priority value is, the higher the priority of each element is.

[0015] Furthermore, in the present disclosure, the priority values ​​increase in ascending order of the index of the spatial domain.

[0016] Furthermore, in the present disclosure, priorities of i) the index of the spatial domain of the strongest coefficient and ii) the index of the spatial domain corresponding to a beam having opposite polarization with respect to the beam corresponding to the strongest coefficient are highest.

[0017] Furthermore, in the present disclosure, the predefined specific index is related to an index in the frequency domain of a strongest coefficient among the coefficients.

[0018] In addition, in the present disclosure, the predefined specific index is 0.

[0019] Furthermore, in the present disclosure, wherein the CSI report consists of a first part and a second part, and wherein the CSI report is omitted in the second part.

[0020] Furthermore, in the present disclosure, the CSI report further includes information on omitting the portion among the plurality of groups.

[0021] Furthermore, in the present disclosure, the information related to the omission includes at least one of (i) information on whether to omit, (ii) information on an object to be omitted, or (iii) information on an amount to be omitted.

[0022] Furthermore, in the present disclosure, the information related to the coefficients includes at least one of i) information on amplitude coefficients, ii) information on phase coefficients, or iii) bitmap information related to the amplitude coefficients and the phase coefficients.

[0023] Furthermore, in the present disclosure, wherein a resource region for transmitting the PUSCH is allocated based on the CSI-related configuration, and wherein a payload size of the calculated CSI exceeds the resource region.

[0024] In addition, in the present disclosure, a user equipment (UE) for reporting channel state information (CSI) through a physical uplink shared channel (PUSCH) in a wireless communication system, the UE comprising: one or more transceivers; one or more processors; and one or more memories, the one or more memories storing instructions for the one or more processors to perform operations and coupled to the one or more processors, wherein the operations include: receiving configuration information from a base station, wherein the configuration information includes (i) CSI-related configuration and (ii) configuration related to transmission power control of the PUSCH; receiving CSI from the base station based on the CSI-related configuration. SI reference signal (CSI-RS); calculating CSI based on the CSI-RS, wherein the CSI includes information related to a coefficient, wherein each element of the information related to the coefficient is classified into multiple groups based on a priority value, and wherein the priority value increases in an order in which higher indices and lower indices of indices of frequency domains related to the elements are sequentially crossed based on a predefined specific index; and sending a CSI report configured by omitting part of the multiple groups among the multiple groups based on the predefined priorities of the multiple groups to the base station through the PUSCH, wherein the transmission power of the PUSCH is determined based on the configuration information.

[0025] In addition, in the present disclosure, a method for receiving channel state information (CSI) by a base station through a physical uplink shared channel (PUSCH) in a wireless communication system, the method comprising: sending configuration information to a user equipment (UE), wherein the configuration information includes (i) a CSI-related configuration and (ii) a configuration related to transmission power control of the PUSCH; based on the CSI-related configuration, sending a CSI reference signal (CSI-RS) to the UE; and receiving a CSI report including CSI measured based on the CSI-RS from the UE through the PUSCH, wherein the CSI includes information related to a coefficient, wherein each element of the information related to the coefficient is classified into multiple groups based on a priority value, wherein the priority value increases based on a predefined specific index in an order in which higher indices and lower indices of indices of frequency domains related to the elements are sequentially crossed, wherein the CSI report is configured by omitting part of the multiple groups among the multiple groups based on the predefined priorities of the multiple groups, and wherein the transmission power of the PUSCH is determined based on the configuration information.

[0026] In addition, in the present disclosure, a base station for receiving channel state information (CSI) through a physical uplink shared channel (PUSCH) in a wireless communication system, the base station comprising: one or more transceivers; one or more processors; and one or more memories, the one or more memories storing instructions for the one or more processors to perform operations and coupled to the one or more processors, wherein the operations include: sending configuration information to a user equipment (UE), wherein the configuration information includes (i) CSI-related configuration and (ii) configuration related to transmission power control of the PUSCH; sending CSI reference information to the UE based on the CSI-related configuration; a carrier signal (CSI-RS); and receiving a CSI report including CSI measured based on the CSI-RS from the UE through the PUSCH, wherein the CSI includes information related to a coefficient, wherein each element of the information related to the coefficient is classified into a plurality of groups based on a priority value, wherein the priority value increases in an order in which higher indices and lower indices of indices of the frequency domain related to the elements are sequentially crossed based on a predefined specific index, wherein the CSI report is configured by omitting part of the plurality of groups among the plurality of groups based on the predefined priorities of the plurality of groups, and wherein the transmission power of the PUSCH is determined based on the configuration information.

[0027] In addition, in the present disclosure, a device includes one or more memories and one or more processors operably coupled to the one or more memories, the device including: wherein the one or more processors control the device to: receive configuration information from a base station, wherein the configuration information includes (i) a CSI-related configuration and (ii) a configuration related to transmission power control of the PUSCH; receive a CSI reference signal (CSI-RS) from the base station based on the CSI-RS; calculate CSI based on the CSI-RS, wherein the CSI includes information related to a coefficient, wherein each element of the information related to the coefficient is classified into multiple groups based on a priority value, and wherein the priority value increases in an order in which higher indices and lower indices of indices of frequency domains related to the elements are sequentially crossed based on a predefined specific index; and send a CSI report configured by omitting part of the multiple groups among the multiple groups based on the predefined priorities of the multiple groups to the base station through the PUSCH, wherein the transmission power of the PUSCH is determined based on the configuration information.

[0028] In addition, in the present disclosure, one or more non-transitory computer-readable media store one or more instructions, and the one or more instructions executable by one or more processors include: instructions instructing a user equipment (UE) to perform the following: receive configuration information from a base station, wherein the configuration information includes (i) CSI-related configuration and (ii) configuration related to transmission power control of the PUSCH; receive a CSI reference signal (CSI-RS) from the base station based on the CSI-RS; calculate CSI based on the CSI-RS, wherein the CSI includes information related to coefficients, wherein each element of the information related to the coefficients is classified into multiple groups based on a priority value, and wherein the priority value increases based on a predefined specific index with a higher index and a higher index of the index of the frequency domain related to the element sequentially crossed; and send a CSI report configured by omitting part of the multiple groups among the multiple groups based on the predefined priority of the multiple groups to the base station through the PUSCH, wherein the transmission power of the PUSCH is determined based on the configuration information.

[0029] Beneficial effects

[0030] According to an embodiment of the present disclosure, channel state information may be reported to a base station while taking into account the payload size of the channel state information.

[0031] According to an embodiment of the present disclosure, channel state information within the allocated resource capacity may be reported by partially omitting the channel state information.

[0032] In addition, according to an embodiment of the present disclosure, channel state information may be reported by performing an omission operation in consideration of priorities of components of the channel state information to minimize information loss within an allocated resource capacity.

[0033] In addition, according to the embodiments of the present disclosure, ambiguity in operations related to CSI omission can be eliminated.

[0034] In addition, according to the embodiments of the present disclosure, it is possible to perform power control when reporting channel state information through the PUSCH.

[0035] Effects obtainable from the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned above can be clearly understood by those skilled in the art to which the present disclosure pertains from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are included to provide a further understanding of the disclosure and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

[0037] Figure 1 is a diagram illustrating an example of an overall system structure of a NR to which the method proposed in the present disclosure can be applied.

[0038] Figure 2 The diagram illustrates the relationship between uplink frames and downlink frames in a wireless communication system to which the method proposed in the present disclosure can be applied.

[0039] Figure 3 An example of a frame structure in an NR system is illustrated.

[0040] Figure 4 An example of a resource grid supported by a wireless communication system to which the method proposed in the present disclosure can be applied is illustrated.

[0041] Figure 5 An example of a resource grid for each antenna port and parameter set to which the method proposed in this disclosure can be applied is illustrated.

[0042] Figure 6 The physical channels and general signal transmission are illustrated.

[0043] Figure 7 is a flow chart illustrating an example of a CSI-related process.

[0044] Figure 8 An example of a process for controlling uplink transmission power is illustrated.

[0045] Figure 9 An example of index remapping in a precoding matrix based on the strongest coefficient indicator (SCI) is shown.

[0046] Figure 10 An example of setting three levels of omission priority and a pair of SD bases in the frequency domain is shown.

[0047] Figure 11 An example of the delay profile of a radio channel is shown.

[0048] Figure 12 An example of setting omission priorities in the spatial domain (SD) based on a single frequency domain (FD) is shown.

[0049] Figure 13 The diagram illustrates an example of a signaling flow chart between a UE and a base station to which the methods and / or embodiments proposed in the present disclosure can be applied.

[0050] Figure 14 The diagram illustrates an example of an operation sequence in which a UE performs CSI reporting, to which the methods and / or embodiments proposed in the present disclosure may be applied.

[0051] Figure 15 An example of an operation flowchart of a BS performing data transmission and reception to which the methods and / or embodiments proposed in the present disclosure may be applied is illustrated.

[0052] Figure 16 The diagram illustrates a communication system applied to the present disclosure.

[0053] Figure 17 The diagram may be applied to the wireless device of the present disclosure.

[0054] Figure 18 The diagram shows the signal processing circuit used to transmit the signal.

[0055] Figure 19 Another example of a wireless device to which the present disclosure is applied is shown.

[0056] Figure 20 The diagram shows a portable device to which the present disclosure is applied. DETAILED DESCRIPTION

[0057] Reference will now be made in detail to embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Figure 1 The detailed description disclosed above is intended to describe exemplary embodiments of the present disclosure, rather than to describe the only embodiment for carrying out the present disclosure. The following detailed description includes details to provide a complete understanding of the present disclosure. However, those skilled in the art will appreciate that the present disclosure can be carried out without the details.

[0058] In some cases, in order to prevent the concepts of the present disclosure from being unclear, known structures and devices may be omitted or illustrated in the form of block diagrams based on the core functions of each structure and device.

[0059] In the following, downlink (DL) refers to communication from a base station to a terminal, and uplink (UL) refers to communication from a terminal to a base station. In the downlink, the transmitter may be part of a base station, and the receiver may be part of a terminal. In the uplink, the transmitter may be part of a terminal, and the receiver may be part of a base station. The base station may be expressed as a first communication device, and the terminal may be expressed as a second communication device. The following terms may be used instead of base station (BS), including: fixed station, Node B (Node B), evolved Node B (eNB), next generation Node B (gNB), base transceiver system (BTS), access point (AP), network (5G network), AI system, roadside unit (RSU), vehicle, robot, unmanned aerial vehicle (UAV), AR (augmented reality) device, VR (virtual reality) device, and the like. In addition, the terminal may be fixed or mobile and may be replaced by the following terms, including: user equipment (UE), mobile station (MS), user terminal (UT), mobile subscriber station (MSS), subscriber station (SS), advanced mobile station (AMS), wireless terminal (WT), machine type communication (MTC) device, machine-to-machine (M2M) device and device-to-device (D2D) device, vehicle, robot, AI module, unmanned aerial vehicle (UAV), AR (augmented reality) device, VR (virtual reality) device, etc.

[0060] The following technologies can be used in various radio access systems including CDMA, FDMA, TDMA, OFDMA, SC-FDMA, etc. CDMA can be implemented as a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as a radio technology such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA can be implemented as a radio technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA), etc. UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS (E-UMTS) using E-UTRA, while Advanced LTE (A) / LTE-A pro is an evolved version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A / LTE-A pro.

[0061] For clarity of description, the technical spirit of the present disclosure is described based on a 3GPP communication system (e.g., LTE-A or NR), but the technical spirit of the present disclosure is not limited thereto. LTE refers to the technology after 3GPP TS 36.xxx version 8. In detail, the LTE technology after 3GPP TS 36.xxx version 10 is called LTE-A, and the LTE technology after 3GPP TS 36.xxx version 13 is called LTE-A pro. 3GPP NR refers to the technology after TS 38.xxx version 15. LTE / NR can be referred to as a 3GPP system. "xxx" refers to the detailed number of the standard document. Matters disclosed in the standard documents opened in this disclosure can be cited for the background technology, terminology, abbreviations, etc. used to describe the present disclosure. For example, the following documents can be referenced.

[0062] 3GPP LTE

[0063] -36.211: Physical channels and modulation

[0064] -36.212: Multiplexing and channel compilation

[0065] -36.213: Physical layer procedures

[0066] -36.300: General description

[0067] -36.331: Radio Resource Control (RRC)

[0068] 3GPP NR

[0069] -38.211: Physical channels and modulation

[0070] -38.212: Multiplexing and Channel Compilation

[0071] -38.213: Physical layer procedures for control

[0072] -38.214: Physical layer procedures for data

[0073] -38.300: NR and NG-RAN general description

[0074] -36.331: Radio Resource Control (RRC) Protocol Specification

[0075] As more and more communication devices require greater communication capacity, there is a demand for improved mobile broadband communication compared to existing radio access technologies (RATs). In addition, large-scale machine type communication (MTC), which provides various services anytime and anywhere by connecting many devices and objects, is one of the main issues to be considered in next-generation communications. In addition, the design of communication systems considering services / UEs that are sensitive to reliability and latency is under discussion. The introduction of next-generation radio access technologies considering enhanced mobile broadband communication (eMBB), massive MTC (mMTC), ultra-reliable low-latency communication (URLLC) is discussed, and in this disclosure, for convenience, the technology is referred to as new RAT. NR is an expression that represents an example of a 5G radio access technology (RAT).

[0076] The three main demand areas of 5G include: (1) enhanced mobile broadband (eMBB), (2) massive machine type communication (mMTC), and (3) ultra-reliable low-latency communication (URLLC).

[0077] Some use cases may require optimization across multiple areas, while others may focus on just one key performance indicator (KPI). 5G supports a variety of use cases in a flexible and reliable manner.

[0078] eMBB goes far beyond basic mobile internet access and encompasses a wide range of two-way tasks, media, and entertainment applications in the cloud or augmented reality. Data is one of the primary drivers of 5G, and for the first time, dedicated voice services may not emerge in the 5G era. In 5G, voice is expected to be handled as an application using the data connection simply provided by the communication system. The main reasons for the increase in traffic include the increase in content size and the growing number of applications requiring high data rates. As more devices connect to the internet, streaming services (audio and video), conversational video, and mobile internet connections will become more widely used. Such a large number of applications require always-on connectivity to deliver real-time information and notifications to users. Cloud storage and applications are rapidly increasing in mobile communication platforms, and this applies to both business and entertainment. In addition, cloud storage is a specific use case driving the increase in uplink data rates. 5G is also being used for remote services in the cloud. When using tactile interfaces, lower end-to-end latency is required to maintain an excellent user experience. Entertainment, such as cloud gaming and video streaming, is another key factor driving the demand for mobile broadband capabilities. Entertainment is essential on smartphones and tablets, anywhere in highly mobile environments, including trains, cars, and airplanes. Another use case is augmented reality and information search for entertainment. In this case, augmented reality requires extremely low latency and instant data throughput.

[0079] Furthermore, one of the most anticipated 5G use cases involves the ability to seamlessly connect embedded sensors across all sectors—mMTC. By 2020, the potential number of Internet of Things (IoT) devices is expected to reach 20.4 billion. One area where 5G will play a major role is the Industrial Internet of Things, enabling smart cities, asset tracking, smart utilities, agriculture, and secure infrastructure.

[0080] URLLC includes a new service that will transform industries by enabling remote control of critical infrastructure and ultra-high reliability / low latency links, such as for autonomous vehicles. This level of reliability and latency is critical for smart grid control, industrial automation, robotics, and drone control and regulation.

[0081] Describe multiple use cases in more detail.

[0082] 5G can complement fiber to the home (FTTH) and cable-based broadband (or DOCSIS) as a means of delivering streams rated from gigabits per second to hundreds of megabits per second. Such fast speeds are also necessary for delivering television with a resolution of 4K or higher (6K, 8K or higher), in addition to virtual reality and augmented reality. Virtual reality (VR) and augmented reality (AR) applications include immersive sports gaming. Specific applications may require special network configurations. For example, in the case of VR gaming, in order for gaming companies to minimize latency, it may be necessary to integrate the core server with the network operator's edge network server.

[0083] With numerous use cases for automotive mobile communications, cars are expected to be a significant and new driver of 5G. For example, passenger entertainment requires both high-capacity and high-mobility mobile broadband. This is because future users will continue to expect high-quality connectivity, regardless of location and speed. Another example of an automotive use case is augmented reality dashboards. These overlay information on what the driver sees through the front window, identifying objects in the dark and notifying the driver of their distance and movement. In the future, wireless modules will enable communication between cars, information exchange between cars and supporting infrastructure, and information exchange between cars and other connected devices (such as those accompanying pedestrians). Safety systems will guide alternative courses of action, enabling drivers to drive more safely and reducing the risk of accidents. The next step will be remotely controlled or autonomous vehicles. This requires extremely reliable and fast communication between different autonomous vehicles and between cars and infrastructure. In the future, autonomous vehicles may perform all driving activities, and drivers will be focused on things outside of traffic that the car itself cannot perceive. The technical requirements for autonomous vehicles require ultra-low latency and ultra-high-speed reliability, increasing traffic safety to a level unattainable by humans.

[0084] The smart cities and smart homes of the proposed smart society will be embedded with high-density radio sensor networks. Distributed networks of smart sensors will identify the cost and energy conservation status of a city or household. Similar configurations can be implemented for each home. All temperature sensors, window and heating controls, burglar alarms, and household appliances will be wirelessly connected. Many of these sensors typically have low data rates, low power consumption, and low cost. However, certain types of surveillance equipment, for example, may require real-time high-definition video.

[0085] The consumption and distribution of energy, including heat and gas, is highly decentralized, necessitating automated control via distributed sensor networks. Smart grids collect information and interconnect these sensors using digital information and communication technologies, enabling them to operate based on this information. This information can include the behavior of suppliers and consumers, enabling smart grids to improve the distribution of fuels, such as electricity, in an efficient, reliable, economical, sustainable, and automated manner. Smart grids can be considered another sensor network with minimal latency.

[0086] The health sector has many applications that benefit from mobile communications. Communication systems can support telemedicine, which provides clinical treatment in remote locations. This helps reduce the barrier of distance and improves access to discontinuous medical services in remote agricultural areas. Furthermore, it can be used to save lives in critical treatments and emergencies. Mobile communication-based radio sensor networks can provide remote monitoring and sensors for parameters such as heart rate and blood pressure.

[0087] Radio and mobile communications are becoming increasingly important in industrial applications. Cabling carries high installation and maintenance costs. Therefore, the potential to replace cables with reconfigurable radio links presents an attractive opportunity in many industrial sectors. However, to realize this potential, radio connections must operate with latency, reliability, and capacity similar to cables, and management must be simplified. Low latency and low error rates are new requirements for 5G connectivity.

[0088] Logistics and freight tracking are important use cases for mobile communications, enabling the tracking of inventory and packages anywhere using location-based information systems. Logistics and freight tracking use cases typically require lower data speeds but require wide areas and reliable location information.

[0089] In new RAT systems including NR, an OFDM transmission scheme or a transmission scheme similar thereto is used. The new RAT system may follow OFDM parameters different from those of LTE. Alternatively, the new RAT system may follow the parameter set of conventional LTE / LTE-A as is or have a larger system bandwidth (e.g., 100 MHz). Alternatively, one cell may support multiple parameter sets. In other words, UEs operating with different parameter sets may coexist in one cell.

[0090] A parameter set corresponds to one subcarrier spacing in the frequency domain. Different parameter sets can be defined by scaling the reference subcarrier spacing to an integer N.

[0091] Definition of terms

[0092] eLTE eNB: eLTE eNB is the evolution of eNB that supports connectivity to EPC and NGC.

[0093] gNB: A node that supports NR and connectivity to NGC.

[0094] New RAN: A radio access network that supports NR or E-UTRA or interfaces with NGC.

[0095] Network slicing: Network slicing refers to a network customized by operators to provide optimized solutions for specific market scenarios with specific requirements within an end-to-end scope.

[0096] Network Function: A network function is a logical node in the network architecture that has a well-defined external interface and well-defined functional behavior.

[0097] NG-C: The control plane interface used over the NG2 reference point between the New RAN and NGC.

[0098] NG-U: User plane interface used over the NG3 reference point between the New RAN and NGC.

[0099] Non-standalone NR: A deployment configuration where the gNB requires an LTE eNB as an anchor for control plane connectivity to the EPC, or requires an eLTE eNB as an anchor for control plane connectivity to the NGC.

[0100] Non-Standalone E-UTRA: A deployment configuration where the eLTE eNB requires the gNB as the anchor for control plane connectivity to the NGC.

[0101] User plane gateway: the termination point of the NG-U interface.

[0102] System Overview

[0103] Figure 1 An example of the overall structure of an NR system to which the method proposed in the present disclosure can be applied is illustrated.

[0104] refer to Figure 1 NG-RAN is composed of gNB, which provides NG-RA user plane (new AS sublayer / PDCP / RLC / MAC / PHY) and control plane (RRC) protocol ends for user equipment (UE).

[0105] The gNBs are interconnected via the Xn interface.

[0106] The gNB is also connected to the NGC via the NG interface.

[0107] More specifically, the gNB is connected to the Access and Mobility Management Function (AMF) via the N2 interface and to the User Plane Function (UPF) via the N3 interface.

[0108] New RAT (NR) parameter set and frame structure

[0109] In NR systems, multiple parameter sets can be supported. The parameter set can be defined by the subcarrier spacing and the CP (cyclic prefix) overhead. The spacing between multiple subcarriers can be derived by scaling the basic subcarrier spacing to an integer N (or μ). In addition, although it is assumed that very low subcarrier spacing is not used at very high subcarrier frequencies, the parameter set to be used can be selected independently of the frequency band.

[0110] In addition, in the NR system, multiple frame structures based on multiple parameter sets can be supported.

[0111] Hereinafter, the Orthogonal Frequency Division Multiplexing (OFDM) parameter set and frame structure that can be considered in the NR system will be described.

[0112] The multiple OFDM parameter sets supported in the NR system can be defined as shown in Table 1.

[0113] [Table 1]

[0114] μ <![CDATA[Δf=2 μ ·15[kHz]]]> cyclic prefix 0 15 Normal 1 30 Normal 2 60 Normal, extended 3 120 Normal 4 240 Normal

[0115] NR supports multiple parameter sets (or subcarrier spacing (SCS)) to support various 5G services. For example, when the SCS is 15kHz, it supports wide areas in the traditional cellular band; when the SCS is 30kHz / 60kHz, it supports dense cities, lower latency and wider carrier bandwidth; and when the SCS is 60kHz or higher, it supports bandwidth greater than 24.25GHz to overcome phase noise.

[0116] The NR band is defined as two types of frequency ranges (FR1 and FR2). FR1 and FR2 can be configured as shown in Table 2 below. In addition, FR2 may refer to millimeter waves (mmW).

[0117] [Table 2]

[0118] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 410MHz-7125MHz 15, 30, 60kHz FR2 24250MHz-52600MHz 60, 120, 240kHz

[0119] Regarding the frame structure in the NR system, the size of each field in the time domain is expressed as T s =1 / (Δf max ·N f ). In this case, Δf max =480·10 3 And Nf = 4096. DL and UL transmissions are configured with T f =(Δf max N f / 100)·T s = A portion of a radio frame of 10 ms. A radio frame consists of ten subframes, each with T sf =(Δf max N f / 1000)·T s = a portion of 1 ms. In this case, there may be a UL frame set and a DL frame set.

[0120] Figure 2 The diagram illustrates the relationship between uplink frames and downlink frames in a wireless communication system to which the method proposed in the present disclosure is applicable.

[0121] like Figure 2 As illustrated in FIG, an uplink frame number i for transmission from a user equipment (UE) should start T before the start of the corresponding downlink frame at the corresponding UE. TA =N TA T s .

[0122] Regarding parameter set μ, the slots are in ascending order within the subframe. Numbered and in ascending order within the radio frame Number. A time slot consists of consecutive OFDM symbols, and Determined by the parameter set and time slot configuration used. Time slot in a subframe The beginning of the OFDM symbol in the same subframe The start of the align in time.

[0123] Not all UEs are capable of transmitting and receiving simultaneously, and this means that not all OFDM symbols in a downlink timeslot or uplink timeslot may be used.

[0124] Table 3 shows the number of OFDM symbols per time slot in a normal CP Number of slots per radio frame and the number of time slots per subframe Table 4 shows the number of OFDM symbols per slot, the number of slots per radio frame, and the number of slots per subframe in the extended CP.

[0125] [Table 3]

[0126]

[0127] [Table 4]

[0128]

[0129] Figure 3 An example of a frame structure in an NR system is illustrated. Figure 3 It is for the convenience of explanation only and does not limit the scope of the present disclosure.

[0130] In Table 4, in the case of μ=2, that is, as an example of a subcarrier spacing (SCS) of 60 kHz, referring to Table 3, one subframe (or frame) may include four slots, and Figure 3 One subframe shown in ={1, 2, 4} time slots, for example, the number of time slots that can be included in one subframe is defined in Table 3.

[0131] Furthermore, a mini-slot may consist of 2, 4, or 7 symbols, or may consist of more or fewer symbols.

[0132] Regarding the physical resources in the NR system, we can consider antenna ports, resource grids, resource elements, resource blocks, carrier parts, etc.

[0133] In the following, the above-mentioned physical resources that can be considered in the NR system are described in more detail.

[0134] First, regarding antenna ports, antenna ports are defined so that the channel over which a symbol on that antenna port is transmitted can be inferred from the channel over which another symbol on the same antenna port is transmitted. When large-scale properties of the channel over which a symbol on one antenna port is transmitted can be inferred from the channel over which a symbol on another antenna port is transmitted, the two antenna ports can be considered to be quasi-colocated or quasi-co-located (QC / QCL) in a relationship. In this case, the large-scale properties include at least one of the following: delay spread, Doppler spread, frequency shift, average received power, and receive timing.

[0135] Figure 4 An example of a resource grid supported in a wireless communication system to which the method proposed in the present disclosure is applicable is illustrated.

[0136] refer to Figure 4 , the resource grid is composed of subcarriers, each subframe consists of 14·2 μ OFDM symbols, but the present disclosure is not limited thereto.

[0137] In NR systems, the transmitted signal is described by one or more resource grids. subcarriers and OFDM symbols, where Indicates the maximum transmission bandwidth and can change not only between parameter sets, but also between uplink and downlink.

[0138] In this case, if Figure 5 As illustrated in , each parameter set μ and antenna port p can configure a resource grid.

[0139] Figure 5 An example of a resource grid for each antenna port and parameter set to which the method proposed in this disclosure is applicable is illustrated.

[0140] Each element of the resource grid for a parameter set μ and an antenna port p is called a resource element and is represented by an index pair Unique identifier, where is an index in the frequency domain, and The index pair (k, l) is used to reference the resource elements in a time slot, where

[0141] Resource elements of parameter set μ and antenna port p Corresponding to complex values If there is no risk of aliasing, or when no particular antenna port or parameter set is specified, then the indices p and μ may be dropped, and as a result, the complex value may be or

[0142] In addition, physical resource blocks are defined as consecutive subcarriers.

[0143] Point A serves as a common reference point for the resource block grid and can be obtained as follows.

[0144] - offsetToPointA for PCell downlink represents the frequency offset between point A and the lowest subcarrier of the lowest resource block, which overlaps with the SS / PBCH block used by the UE for initial cell selection, and is expressed in units of resource blocks, where the subcarrier spacing for FR1 is assumed to be 15 kHz and the subcarrier spacing for FR2 is assumed to be 60 kHz;

[0145] -absoluteFrequencyPointA represents the frequency position of point A, expressed as an absolute radio frequency channel number (ARFCN).

[0146] Common resource blocks are numbered from 0 upwards in the frequency domain and are used for subcarrier spacing configuration μ.

[0147] The center of subcarrier 0 of common resource block 0 for subcarrier spacing configuration μ coincides with "point A". The common resource block number in the frequency domain can be given by the following equation 1 and resource elements (k, l) for subcarrier spacing configuration μ.

[0148] [Equation 1]

[0149]

[0150] Here, k can be defined relative to point A, such that k=0 corresponds to a subcarrier centered at point A. Physical resource blocks are defined within a bandwidth part (BWP) and are spaced from 0 to Number, where i is the number of the BWP. Physical resource block n in BWPi PRB and public resource block n CRB The relationship between can be given by the following equation 2.

[0151] [Equation 2]

[0152]

[0153] Here, It can be a common resource block where the BWP starts relative to common resource block 0.

[0154] Physical channels and general signal transmission

[0155] Figure 6 This diagram illustrates the physical channels and general signal transmission used in 3GPP systems. In wireless communication systems, a UE receives information from a base station (eNB) via a downlink (DL) and transmits information to the eNB via an uplink (UL). The information transmitted and received by the eNB and UE includes data and various control information. Various physical channels exist depending on the type and purpose of the information transmitted and received by the eNB and UE.

[0156] When a UE is powered on or newly enters a cell, it performs an initial cell search operation (S601), such as synchronization with the eNB. To this end, the UE may receive the Primary Synchronization Signal (PSS) and Secondary Synchronization Signal (SSS) from the eNB, synchronize with the eNB, and obtain information such as the cell ID. Subsequently, the UE may receive the Physical Broadcast Channel (PBCH) from the eNB and obtain intra-cell broadcast information. Simultaneously, during the initial cell search, the UE receives a Downlink Reference Signal (DL RS) to check the downlink channel status.

[0157] The UE that has completed the initial cell search acquires more specific system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) according to information loaded on the PDCCH (S602).

[0158] Meanwhile, when there is no radio resource for first accessing the eNB or for signal transmission, the UE may perform a random access procedure (RACH) to the eNB (S603 to S606). To this end, the UE may transmit a specific sequence to a preamble via a physical random access channel (PRACH) (S603 and S605), and receive a response message (Random Access Response (RAR) message) for the preamble via the PDCCH and the corresponding PDSCH. In the case of a contention-based RACH, a contention resolution procedure may be additionally performed (S606).

[0159] The UE performing the above-described process may then perform PDCCH / PDSCH reception (S607) and physical uplink shared channel (PUSCH) / physical uplink control channel (PUCCH) transmission (S608) as a general uplink / downlink signal transmission process. Specifically, the UE may receive downlink control information (DCI) via the PDCCH. The DCI may include control information such as resource allocation information for the UE, and the format may be applied differently depending on the intended use.

[0160] Meanwhile, the control information transmitted by the UE to the eNB through the uplink or received by the UE from the eNB may include downlink / uplink ACK / NACK signals, channel quality indicator (CQI), precoding matrix index (PMI), rank indicator (RI), etc. The UE may transmit control information such as CQI / PMI / RI through the PUSCH and / or PUCCH.

[0161] CSI-related operations

[0162] In New Radio (NR) systems, Channel State Information-Reference Signal (CSI-RS) is used for time and / or frequency tracking, CSI calculation, Layer 1 (L1)-Reference Signal Received Power (RSRP) calculation, and mobility. Here, CSI calculation is related to CSI acquisition, and L1-RSRP calculation is related to Beam Management (BM).

[0163] Channel state information (CSI) generally refers to information that may indicate the quality of a radio channel (or referred to as a link) formed between a UE and an antenna port.

[0164] Figure 7 is a flow chart illustrating an example of a CSI-related process.

[0165] Reference Figure 7 In order to perform one of the usages of CSI-RS, a terminal (e.g., user equipment (UE)) receives CSI-related configuration information from a base station (e.g., general Node B or gNB) through radio resource control (RRC) signaling (step S710).

[0166] The CSI-related configuration information may include at least one of the following: CSI-interference management (IM) resource related information, CSI measurement configuration related information, CSI resource configuration related information, CSI-RS resource related information, or CSI report configuration related information.

[0167] CSI-IM resource-related information may include CSI-IM resource information, CSI-IM resource set information, etc. A CSI-IM resource set is identified by a CSI-IM resource set identifier (ID), and a resource set includes at least one CSI-IM resource. Each CSI-IM resource is identified by a CSI-IM resource ID.

[0168] The CSI resource configuration related information may be represented as CSI-ResourceConfig IE. The CSI resource configuration related information defines a group including at least one of the following: a non-zero power (NZP) CSI-RS resource set, a CSI-IM resource set, or a CSI-SSB resource set. In other words, the CSI resource configuration related information may include a CSI-RS resource set list, and the CSI-RS resource set list may include at least one of the following: an NZP CSI-RS resource set list, a CSI-IM resource set list, or a CSI-SSB resource set list. A CSI-RS resource set is identified by a CSI-RS resource set ID, and one resource set includes at least one CSI-RS resource. Each CSI-RS resource is identified by a CSI-RS resource ID.

[0169] Table 5 shows an example of NZP CSI-RS resource set IE. As shown in Table 5, parameters indicating CSI-RS usage (eg, BM-related "repeat" parameter and tracking-related "trs-info" parameter) may be configured for each NZP CSI-RS resource set.

[0170] [Table 5]

[0171]

[0172] In addition, the repetition parameter corresponding to the higher layer parameter corresponds to "CSI-RS-ResourceRep" of the L1 parameter.

[0173] The CSI reporting configuration related information includes the reportConfigType parameter indicating the time domain behavior and the reportQuantity parameter indicating the CSI related quantity used for reporting. The time domain behavior can be periodic, aperiodic or semi-persistent.

[0174] The CSI report configuration related information may be represented as CSI-ReportConfig IE, and Table 6 below shows an example of the CSI-ReportConfig IE.

[0175] [Table 6]

[0176]

[0177] The UE measures CSI based on the CSI-related configuration information (step S720). The CSI measurement may include (1) a CSI-RS reception process of the UE (step S721) and (2) a process of calculating CSI using the received CSI-RS (step S722), and a detailed description thereof will be described below.

[0178] For CSI-RS, the resource element (RE) mapping of CSI-RS resources is configured in the time and frequency domains by the higher layer parameter CSI-RS-ResourceMapping.

[0179] Table 7 shows an example of CSI-RS-ResourceMapping IE.

[0180] [Table 7]

[0181]

[0182] In Table 7, density (D) represents the density of CSI-RS resources measured in RE / port / physical resource block (PRB), and nrofPort represents the number of antenna ports.

[0183] The UE reports the measured CSI to the BS (step S730).

[0184] Here, in the case that the number of CSI-ReportConfig of Table 7 is configured as "None (or No Report)", the UE may skip the report.

[0185] However, even in the case where the number is configured as "None (or No Report)", the UE may report the measured CSI to the BS.

[0186] The case where the number is configured as "None (or No Report)" is a case where an aperiodic TRS is triggered or a case where repetition is configured.

[0187] Here, the UE's reporting can be skipped only if repetition is configured to "ON".

[0188] CSI measurement

[0189] The NR system supports more flexible and dynamic CSI measurement and reporting. Here, CSI measurement can include the process of obtaining CSI by receiving CSI-RS and calculating the received CSI-RS.

[0190] As time-domain behaviors for CSI measurement and reporting, aperiodic / semi-persistent / periodic channel measurement (CM) and interference measurement (IM) are supported. A 4-port NZP CSI-RS RE pattern is used to configure CSI-IM.

[0191] NR's CSI-IM-based IMR has a similar design to LTE's CSI-IM and is configured independently of the ZP CSI-RS resources used for PDSCH rate matching. In addition, in NZP CSI-RS-based IMR, each port simulates an interference layer with (preferred channel and) precoded NZP CSI-RS. This is for intra-cell interference measurements for multi-user scenarios and primarily targets MU interference.

[0192] The BS sends the precoded NZP CSI-RS to the UE on each port of the configured NZP CSI-RS based IMR.

[0193] The UE assumes a channel / interference layer for each port and measures the interference.

[0194] Regarding the channel, when there is no PMI and RI feedback, multiple resources are configured in a set, and the BS or network indicates a subset of NZP CSI-RS resources for channel / interference measurement through DCI.

[0195] Resource settings and resource setting configurations will be described in more detail.

[0196] Resource Settings

[0197] Each CSI resource setting "CSI-ResourceConfig" includes the configuration for S≥1 CSI resource sets (given by the higher-layer parameter csi-RS-ResourceSetList). A CSI resource setting corresponds to CSI-RS-resourcesetlist. Here, S represents the number of configured CSI-RS resource sets. Here, the configuration for S≥1 CSI resource sets includes each CSI resource set, and each CSI resource set includes CSI-RS resources (consisting of NZP CSI-RS or CSI IM) and SS / PBCH block (SSB) resources for L1-RSRP calculation.

[0198] Each CSI resource setting is located in a DL BWP (bandwidth part) identified by a higher layer parameter bwp-id. In addition, all CSI resource settings linked to a CSI reporting setting have the same DL BWP.

[0199] The time domain behavior of the CSI-RS resources within the CSI resource settings included in the CSI-ResourceConfig IE is indicated by the higher layer parameter resourceType and can be configured as aperiodic, periodic, or semi-persistent. The number of configured CSI-RS resource sets S is limited to "1" for periodic and semi-persistent CSI resource settings. The configured period and slot offset are given in the parameter set of the associated DL BWP as given by bwp-id for periodic and semi-persistent CSI resource settings.

[0200] When a UE is configured with multiple CSI-ResourceConfigs including the same NZP CSI-RS resource ID, the same time domain behavior is configured with respect to the CSI-ResourceConfigs.

[0201] When a UE is configured with multiple CSI-ResourceConfigs including the same CSI-IM resource ID, the same time domain behavior is configured with respect to the CSI-ResourceConfigs.

[0202] Next, one or more CSI resource settings for channel measurement (CM) and interference measurement (IM) are configured through higher layer signaling.

[0203] -CSI-IM resources for interference measurement.

[0204] -NZP CSI-RS resources for interference measurement.

[0205] -NZP CSI-RS resources for channel measurement.

[0206] That is, the channel measurement resource (CMR) may be an NZP CSI-RS, and the interference measurement resource (IMR) may be an NZP CSI-RS for CSI-IM and IM.

[0207] Here, CSI-IM (or ZP CSI-RS for IM) is mainly used for inter-cell interference measurement.

[0208] In addition, the NZP CSI-RS for IM is mainly used for intra-cell interference measurement from multiple users.

[0209] The UE may assume that the CSI-RS resources for channel measurement and the CSI-IM / NZP CSI-RS resources for interference measurement configured for one CSI report are "QCL-Type D" for each resource.

[0210] Resource Settings Configuration

[0211] As described above, a resource setting may represent a list of resource settings.

[0212] In each trigger state configured by using the higher layer parameter CSI-AperiodTriggerState for aperiodic CSI, each CSI-ReportConfig is associated with one or more CSI-ReportConfigs linked to periodic, semi-persistent or aperiodic resource settings.

[0213] A report setting can be associated with up to three resource settings.

[0214] - When a resource set is configured, the resource set (given by the higher layer parameter resourcesForChannelMeasurement) is used for channel measurement for L1-RSRP calculation.

[0215] - When two resource settings are configured, the first resource setting (given by the higher layer parameter resourcesForChannelMeasurement) is used for channel measurement, and the second resource setting (given by csi-IM-ResourcesForInterference or nzp-CSI-RS-ResourcesForInterference) is used for interference measurement performed on CSI-IM or NZP CSI-RS.

[0216] -When three resource settings are configured, the first resource setting (given by ResourcesForChannelMeasurement) is used for channel measurement, the second resource setting (given by csi-IM-ResourcesForInterference) is used for CSI-IM based interference measurement, and the third resource setting (given by nzp-CSI-RS-ResourcesForInterference) is used for NZP CSI-RS based interference measurement.

[0217] Each CSI-ReportConfig is linked to a periodic or semi-persistent resource setting regarding semi-persistent or periodic CSI.

[0218] - When a resource setting is configured (given by resourceForChannelMeasurement), this resource setting is used for channel measurement for L1-RSRP calculation.

[0219] - When two resource settings are configured, the first resource setting (given by resourceForChannelMeasurement) is used for channel measurement and the second resource setting (given by the higher layer parameter csi-IM-ResourceForInterference) is used for interference measurement performed on CSI-IM.

[0220] CSI calculation

[0221] When performing interference measurement on CSI-IM, each CSI-RS resource used for channel measurement is associated with a CSI-IM resource for each resource in the order of the CSI-RS resource and the CSI-IM resource within the corresponding resource set. The number of CSI-RS resources used for channel measurement is equal to the number of CSI-IM resources.

[0222] Additionally, when performing interference measurement in NZP CSI-RS, the UE does not expect one or more NZP CSI-RS resources in the associated resource set within the resource setting configured for channel measurement.

[0223] A UE in which the higher layer parameter nzp-CSI-RS-ResourcesForInterference is configured does not expect that 18 or more NZP CSI-RS ports will be configured in the NZP CSI-RS resource set.

[0224] For CSI measurement, the UE assumes the following.

[0225] - Each NZP CSI-RS port configured for interference measurement corresponds to an interfering transmission layer.

[0226] - Consider the energy per resource element (EPRE) ratio among all interfering transmission layers of the NZP CSI-RS ports used for interference measurement.

[0227] - Different interference signals on REs of NZP CSI-RS resources for channel measurement, NZP CSI-RS resources for interference measurement, or CSI-IM resources for interference measurement.

[0228] CSI Report

[0229] For CSI reporting, the time and frequency resources used by the UE are controlled by the BS.

[0230] Channel state information (CSI) may include at least one of the following: channel quality indicator (CQI), precoding matrix indicator (PMI), CSI-RS resource indicator (CRI), SS / PBCH block resource indicator (SSBRI), layer indicator (LI), rank indicator (RI) and L1-RSRP.

[0231] For CQI, PMI, CRI, SSBRI, LI, RI and L1-RSRP, the UE is configured by higher layers with N≥1 CSI-ReportConfig reporting settings, M≥1 CSI-ResourceConfig resource settings, and a list of one or two trigger states (provided by aperiodicTriggerStateList and semiPersistentOnPUSCH). In aperiodicTriggerStateList, each trigger state includes a channel and an associated CSI-ReportConfig list, which optionally indicates the resource set ID used for interference. In semiPersistentOnPUSCH-TriggerStateList, each trigger state includes an associated CSI-ReportConfig.

[0232] In addition, the time domain behavior of CSI reporting supports periodic, semi-persistent and aperiodic.

[0233] i) Periodic CSI reporting is performed on short PUCCH and long PUCCH. The period and slot offset of periodic CSI reporting can be configured as RRC and refer to CSI-ReportConfig IE.

[0234] ii) Semi-periodic (SP) CSI reporting is performed on short PUCCH, long PUCCH or PUSCH.

[0235] In case of SP CSI on short / long PUCCH, period and slot offset are configured as RRC, and CSI reporting for separate MAC CE / DCI is activated / deactivated.

[0236] In the case of SP CSI on PUSCH, the periodicity of SP CSI reporting is configured by RRC, but the slot offset is not configured by RRC, and SP CSI reporting is activated / deactivated by DCI (format 0_1). A separate RNTI (SP-CSI C-RNTI) is used for SP CSI reporting on PUSCH.

[0237] The initial CSI reporting timing follows the PUSCH time domain allocation value indicated in the DCI, and the subsequent CSI reporting timing follows the period configured through RRC.

[0238] DCI format 0_1 ​​may include a CSI request field and may activate / deactivate a specific configured SP-CSI triggering state. SP CSI reporting has the same or similar activation / deactivation mechanism as data transmission on the SPS PUSCH.

[0239] iii) Aperiodic CSI reporting is performed on the PUSCH and is triggered by DCI. In this case, information related to the triggering of aperiodic CSI reporting can be transmitted / indicated / configured through MAC-CE.

[0240] In case that AP CSI has AP CSI-RS, AP CSI-RS timing is configured by RRC and the timing for AP CSI reporting is dynamically controlled by DCI.

[0241] NR does not adopt the scheme of dividing and reporting CSI in multiple reporting instances (e.g., sequentially sending RI, WB PMI / CQI, and SB PMI / CQI) used for PUCCH-based CSI reporting in LTE. Instead, NR restricts specific CSI reports from being configured in short / long PUCCH and defines CSI omission rules. In addition, regarding AP CSI reporting timing, the PUSCH symbol / slot position is dynamically indicated by DCI. In addition, the candidate slot offset is configured by RRC. For CSI reporting, the slot offset (Y) is configured for each report setting. For UL-SCH, the slot offset K2 is configured separately.

[0242] Two CSI delay levels (low delay level and high delay level) are defined according to the CSI calculation complexity. Low delay CSI is WB CSI including type I codebooks up to 4 ports or non-PMI feedback CSI up to 4 ports. High delay CSI refers to CSI other than low delay CSI. For normal UEs, (Z, Z') are defined in units of OFDM symbols. Here, Z represents the minimum CSI processing time from receiving aperiodic CSI triggering DCI to performing CSI reporting. In addition, Z' represents the minimum CSI processing time from receiving CSI-RS for channel / interference to performing CSI reporting.

[0243] In addition, the UE reports the number of CSIs that can be calculated simultaneously.

[0244] Table 8 below refers to the CSI reporting configuration defined in TS 38.214.

[0245] [Table 8]

[0246]

[0247] In addition, the following Table 9 is information related to activation / deactivation / triggering by MAC-CE, which is related to semi-persistent / aperiodic CSI reporting defined in TS38.321.

[0248] [Table 9]

[0249]

[0250] CSI reporting using PUSCH

[0251] Aperiodic CSI reporting performed in PUSCH supports wideband and sub-band frequency segmentation. Aperiodic CSI reporting performed in PUSCH supports Type I and Type II CSI.

[0252] SP CSI reporting for PUSCH supports Type I and Type II CSI with wideband and sub-band frequency granularity. PUSCH resources and modulation and coding scheme (MCS) for SP CSI reporting are semi-persistently allocated by UL DCI.

[0253] The CSI report for PUSCH may include Part 1 and Part 2. Part 1 is used to identify the number of information bits in Part 2. Part 1 is fully delivered before Part 2.

[0254] - Regarding Type I CSI feedback, part 1 includes (if reported) RI, (if reported) CRI and CQI for the first codeword. Part 2 includes PMI, and when RI>4, part 2 includes CQI.

[0255] -For Type II CSI feedback, Part 1 has a fixed payload size and includes an indication of the number of non-zero wideband amplitude coefficients for each layer of RI, CQI, and Type II CSI (NIND). Part 2 includes the PMI of Type II CSI. Parts 1 and 2 are encoded independently.

[0256] When the CSI report includes two parts in PUSCH and the CSI payload is smaller than the payload size provided by the PUSCH resources allocated for CSI reporting, the UE may omit a part of the second CSI. The omission of part 2 CSI is determined according to the priority shown in Table 10, with priority 0 being the highest priority and 2N being the highest priority. Rep is the lowest priority. Here, N Rep Indicates the number of CSI reports in a time slot.

[0257] [Table 10]

[0258]

[0259] When Part 2 CSI information for a specific priority level is omitted, the UE omits all information of the corresponding priority level.

[0260] When a UE is scheduled to transmit a transport block on the PUSCH multiplexed with CSI reporting, the UCI code rate used to transmit all part 2 is greater than the threshold code rate. When , part of 2CSI is omitted. Here, c MCS represents the target PUSCH code rate, and Indicates the CSI offset value.

[0261] Starting from the lowest priority level, Part 2CSI is omitted level by level, and the lowest priority level until the UCI code rate is less than or equal to c T .

[0262] When Part 2 CSI is sent on PUSCH without a transport block, the lower priority bits are omitted until the code rate of Part 2 CSI is less than a threshold code rate below 1 here, and represents the CSI offset value, and r CSI-1 Based on the code rate calculated by the UE or signaled through DCI.

[0263] CSI reporting using PUCCH

[0264] The UE may be configured with multiple periodic CSI reports corresponding to a CSI reporting configuration indication configured with one or more higher layers. Here, the associated CSI measurement links and CSI resource configurations are configured as higher layers.

[0265] In PUCCH formats 2, 3, or 4, periodic CSI reporting supports Type I CSI based on wide bandwidth.

[0266] Regarding SP CSI on PUSCH, after sending the HARQ-ACK corresponding to the PDSCH carrying the selection command in time slot n, the UE SP CSI reporting for PUCCH is performed in.

[0267] The selection command includes one or more reporting setting indications in which the associated CSI resource settings are configured.

[0268] In PUCCH, SP CSI reporting supports Type I CSI.

[0269] SP CSI reporting in PUCCH format 2 supports Type I CSI with wide bandwidth frequency granularity. In PUCCH format 3 or 4, SP CSI reporting supports Type I subband CSI and Type II CSI with wideband frequency granularity.

[0270] When PUCCH carries Type I CSI with wide bandwidth frequency granularity, the CSI payload carried by PUCCH format 2 and PUCCH format 3 or 4 is the same as CRI (when reported), regardless of RI.

[0271] In PUCCH format 3 or 4, the Type I CSI subband payload is divided into two parts.

[0272] The first part (Part 1) includes RI, (report) CRI and (report) CQI of the first codeword. The second part (Part 2) includes PMI, and when RI>4, the second part (Part 2) includes CQI of the second codeword.

[0273] SP CSI reporting performed in PUCCH format 3 or 4 supports Type II CSI feedback, but only supports part 1 of Type I CSI feedback.

[0274] In PUCCH formats 3 or 4 supporting Type II CSI feedback, CSI reporting may depend on UE capabilities.

[0275] Type II CSI reports delivered in PUCCH format 3 or 4 (of which only part 1 is applicable) are calculated independently of Type II CSI reporting performed in PUSCH.

[0276] When the UE is configured with CSI reporting of PUCCH format 2, 3 or 4, each PUCCH resource is configured for each candidate UL BWP.

[0277] When the UE receives an active SP CSI reporting configuration on the PUCCH and does not receive a deactivation command, it performs CSI reporting when the BWP for the CSI report is the active BWP, and temporarily suspends CSI reporting otherwise. This also applies to the case of SP CSI on the PUCCH. For PUSCH-based SP CSI reporting, the corresponding CSI reporting is automatically deactivated when a BWP switch occurs.

[0278] According to the length of PUCCH transmission, the PUCCH format can be classified as short PUCCH or long PUCCH. PUCCH formats 0 and 2 can be called short PUCCH, and PUCCH formats 1, 3 and 4 can be called long PUCCH.

[0279] Regarding PUCCH-based CSI reporting, short PUCCH-based CSI reporting and long PUCCH-based CSI reporting will be described in detail below.

[0280] Short PUCCH-based CSI reporting is only used for wideband CSI reporting. Short PUCCH-based CSI reporting has the same payload regardless of the RI / CRI of a given slot to avoid blind decoding.

[0281] The size of the information payload may differ between the maximum CSI-RS ports of the CSI-RS configured in the CSI-RS resource set.

[0282] When a payload including PMI and CQI is diversified to include RI / CQI, padding bits are added to the RI / CRI / PMI / CQI before the encoding process to equalize the payload associated with different RI / CRI values. Additionally, RI / CRI / PMI / CQI can be encoded with padding bits if necessary.

[0283] In the case of wideband reporting, long PUCCH-based CSI reporting can use the same solution as short PUCCH-based CSI reporting.

[0284] CSI reporting based on long PUCCH uses the same payload regardless of RI / CRI.For subband reporting, two-part coding is applied (for type I).

[0285] Part 1 may have a fixed payload according to the number of ports, CSI type, RI limit, etc., and part 2 may have various payload sizes according to part 1.

[0286] CSI / RI may be first encoded to determine a payload of PMI / CQI. In addition, CQIi (i=1, 2) corresponds to the CQI of the i-th codeword (CW).

[0287] For long PUCCH, Type II CSI reports may convey only part 1.

[0288] Uplink power control [TS38.213, TS38.321, TS38.331, TS38.101]

[0289] In wireless communication systems, it may be necessary to increase or decrease the transmission power of a terminal (e.g., user equipment, UE) and / or mobile device depending on the situation. As mentioned above, controlling the transmission power of a terminal and / or mobile device may be referred to as uplink power control. As an example, a transmission power control method may be applied to meet the requirements of a base station (e.g., gNB or eNB) (e.g., signal-to-noise ratio (SNR), bit error rate (BER), or block error rate (BLER)).

[0290] The above-mentioned power control may be performed according to an open-loop power control method or a closed-loop power control method.

[0291] Specifically, the open-loop power control method controls transmission power without feedback from a transmitting device (e.g., a base station) to a receiving device (e.g., a user equipment terminal) and / or without feedback from the receiving device to the transmitting device. For example, the user equipment terminal may receive a pilot channel / signal from the base station and use the received pilot channel / signal to estimate the received power strength. The user equipment may then use the estimated received power strength to control transmission power.

[0292] Unlike the open-loop power control method described above, the closed-loop power control method controls transmission power based on feedback from the transmitting device to the receiving device and / or based on feedback from the receiving device to the transmitting device. For example, the BS receives a pilot channel / signal from the UE and determines the optimal power level for the UE based on the power level, SNR, BER, or BLER measured using the received pilot channel / signal. The BS can transmit information (i.e., feedback) regarding the determined optimal power level to the UE via a control channel, and the UE can use the feedback provided by the BS to control transmission power.

[0293] Hereinafter, a power control method in the case where a UE and / or a mobile device performs uplink transmission to a BS in a wireless communication system will be described in detail. From now on, a power control method for transmission of 1) an uplink data channel (e.g., a physical uplink shared channel (PUSCH)) and 2) an uplink control channel (e.g., a physical uplink control channel (PUCCH)) will be described. At this time, the transmission timing (i.e., transmission time unit) of the PUCCH and / or PUCCH (i) can be represented by a time slot index n s, the first symbol S in a time slot or the number of consecutive symbols L in a frame with a specific system frame number (SFN).

[0294] Power control of uplink data channels

[0295] In the following, for convenience of description, the power control method is described based on the assumption that the UE performs PUSCH transmission. However, it should be noted that the corresponding method can be extended to be applied to other types of uplink data channels supported in the wireless communication system.

[0296] In the case of PUSCH transmission in the active UL bandwidth part (UL BWP) of the carrier (f) in the serving cell (c), the UE may calculate a linear power value of the transmission power determined by the following equation 3. Thereafter, the corresponding UE may control the transmission power based on the calculated linear power value by considering the number of antenna ports and / or SRS ports.

[0297] Specifically, when the UE performs PUSCH transmission in the active UL BWP (b) of the carrier (f) in the serving cell (c) using the parameter set configuration based on index j and the PUSCH power control adjustment state based on l, the UE can determine the PUSCH transmission power P of the PUSCH transmission opportunity (i) based on the following equation 3 PUSCH，b，f，c (i, j, q d , l)dBm.

[0298] [Equation 3]

[0299]

[0300] In Equation 3, index j represents the index of the open-loop power control parameter (e.g., P O , α), and each cell can be configured with up to 32 parameter sets. d Indicates the path loss (PL) measurement (e.g., PL b，f，c (q d )) of the DL RS resource, and each cell can be configured with up to 4 measurement values. The index l represents the closed-loop power control process index, and each cell can be configured with up to 2 processes.

[0301] Specifically, P O (For example, P O_PUSCH，b，f，c (j)) is a parameter broadcast as part of system information and may indicate a target received power at the receiver side. The corresponding P may be configured by considering the UE's throughput, cell capacity, noise, and / or interference. O In addition, α (e.g., α b，f，c(j)) may indicate the ratio of path loss compensation. α may be set to a value between 0 and 1, and full or partial path loss compensation may be performed depending on the set value. In this case, the α value may be configured by considering interference between UEs and / or data rate.

[0302] In addition, P CMAX，f，c (i) may represent the configured UE transmission power. For example, the configured UE transmission power may be interpreted as the “configured maximum UE output power” defined in 3GPP TS 38.101-1 and / or TS 38.101-2. In addition, The bandwidth of the PUSCH resource allocation expressed by the number of resource blocks (RBs) for the PUSCH transmission opportunity based on the subcarrier spacing μ may be indicated. In addition, the f related to the PUSCH power control adjustment state may be configured or indicated based on the TPC command field of the DCI (e.g., DCI format 0_0, DCI format 0_1, DCI format 2_2, or DCI format 2_3). b，f，c (i, l).

[0303] In this case, a specific radio resource control (RRC) parameter (e.g., SRI-PUSCHPowerControl-Mapping) may indicate the SRS resource indicator (SRI) field and indexes j, q of the downlink control information (DCI). d In other words, the relationship between index j, q d Based on specific information, PUSCH transmission power control can be performed in units of beams, panels, and / or spatial domain transmission filters.

[0304] The parameters and / or information for PUSCH power control may be configured separately (i.e., independently) for each BWP. In this case, the corresponding parameters and / or information may be configured or indicated by higher layer signaling (e.g., RRC signaling or media access control-control element (MAC-CE)) and / or DCI. For example, the parameters and / or information for PUSCH power control may be delivered via RRC signaling PUSCH-ConfigCommon or PUSCH-PowerControl, where PUSCH-ConfigCommon and PUSCH-PowerControl may be configured as shown in Table 11 below.

[0305] [Table 11]

[0306]

[0307] Through the above method, the UE can determine or calculate the PUSCH transmission power, and can send the PUSCH using the determined or calculated PUSCH transmission power.

[0308] Power control of uplink control channels

[0309] Hereinafter, for convenience of description, the power control method is described based on the assumption that the UE performs PUCCH transmission. However, it should be noted that the corresponding method can be extended to be applied to other types of uplink control channels supported in a wireless communication system.

[0310] Specifically, when the UE performs PUCCH transmission in the active UL BWP (b) of the carrier (f) in the primary cell (or secondary cell) (c) using the PUCCH power control adjustment state based on index 1, the UE can determine the PUCCH transmission power P for the PUSCH transmission opportunity (i) based on the following equation 4: PUCCH，b，f，c (i,q u ,q d , l)dBm.

[0311] [Equation 4]

[0312]

[0313] In Equation 4, q u Indicates the index of the open loop power control parameter (e.g., P O ), and each cell can be configured with up to 8 parameter values. d Indicates the path loss (PL) measurement (e.g., PL b，f，c (q d )) of the DL RS resource, and each cell can be configured with up to 4 measurement values. The index l represents the closed-loop power control process index, and each cell can be configured with up to 2 processes.

[0314] Specifically, P O (For example, P O_PUCCH，b，f，c (q u )) is a parameter broadcast as part of system information and may indicate a target received power on the receiver side. The corresponding P may be configured by considering the UE's throughput, cell capacity, noise, and / or interference. O In addition, P CMAX，f，c (i) may represent the configured UE transmission power. For example, the configured UE transmission power may be interpreted as the “configured maximum UE output power” defined in 3GPP TS 38.101-1 and / or TS 38.101-2. In addition, The bandwidth of the PUCCH resource allocation expressed by the number of resource blocks (RBs) of the PUCCH transmission opportunity based on the subcarrier spacing μ can be represented. In addition, the delta function (e.g., Δ F_PUCCH (F), Δ TF，b，f，c (i)). In addition, g related to the PUCCH power control adjustment state b，f，c (i, l) may be configured or indicated based on a TPC command field of a DCI (eg, DCI format 1_0, DCI format 1_1, or DCI format 2_2) received or detected by the UE.

[0315] In this case, specific RRC parameters (e.g., PUCCH-SpatialRelationInfo) and / or specific MAC-CE commands (e.g., PUCCH spatial relation activation / deactivation) may be used to activate or deactivate the PUCCH resource and index q u ,q d For example, the PUCCH spatial relationship activation / deactivation command in MAC-CE can activate or deactivate the PUCCH resource and index q based on the RRC parameter PUCCH-SpatialRelationInfo. u ,q d , and the connection relationship between l. In other words, the index q u ,q d , and l can be associated / correlated with a beam, panel, and / or spatial domain transmission filter based on specific information. Based on the above, PUCCH transmission power control can be performed in units of beams, panels, and / or spatial domain transmission filters.

[0316] The parameters and / or information of PUCCH power control can be configured separately (i.e., independently) for each BWP. In this case, the corresponding parameters and / or information can be configured or indicated by higher layer signaling (e.g., RRC signaling or MAC-CE) and / or DCI. For example, the parameters and / or information for PUCCH power control can be delivered through RRC signaling PUCCH-ConfigCommon or PUCCH-PowerControl, where PUCCH-ConfigCommon and PUCCH-PowerControl can be configured as shown in Table 12 below.

[0317] [Table 11]

[0318]

[0319] Through the above method, the UE can determine or calculate the PUCCH transmission power, and can send the PUCCH using the determined or calculated PUCCH transmission power.

[0320] Transmit power control priority

[0321] Hereinafter, a method for controlling the transmission power of a UE will be described, which considers a single-cell operation in a carrier aggregation case or a single-cell operation in a multi-UL carrier case (eg, two UL carriers).

[0322] At this time, when the total UE transmit power used for uplink transmission (PUSCH, PUCCH, SRS and / or PRACH transmission) in each transmission opportunity (i) exceeds the linear value of the configured UE transmit power (e.g., ), the UE may be configured to allocate power to uplink transmissions according to the priority order. For example, the configured UE transmission power may refer to the “configured maximum UE output power” (e.g., P) defined in 3GPP TS 38.101-1 and / or TS 38.101-2. CMAX (i)).

[0323] At this time, the priorities for transmission power control may be configured or defined in the following order.

[0324] -PRACH transmission in the primary cell (PCell)

[0325] - Hybrid Automatic Repeat Request and Acknowledgement (HARQ-ACK) information and / or PUCCH for scheduling requests, or PUSCH for HARQ-ACK information

[0326] - PUCCH or PUSCH for channel state information (CSI)

[0327] - PUSCH not used for HARQ-ACK information or CSI

[0328] - SRS transmission in a serving cell other than the PCell (note that aperiodic SRS has a higher priority than semi-persistent SRS and / or periodic SRS) or PRACH transmission

[0329] Through the above-described priority-based power allocation, the UE can control the total transmit power in each symbol of the transmission opportunity (i) to be less than or equal to the linear value of the configured UE transmit power. For example, to this end, the UE can be configured to scale and / or drop the power used for uplink transmissions with low priority. In this case, the specific details for scaling and / or dropping can be configured or defined to suit the UE implementation.

[0330] Furthermore, as a specific example, when transmissions in a carrier aggregation scenario have the same priority, the UE may consider transmissions in the Pcell to have a higher priority than transmissions in the Scell. Furthermore, when transmissions in a multiple UL carrier scenario (e.g., two UL carriers) have the same priority, the UE may consider the carrier configured for PUCCH transmission to have a higher priority. Furthermore, when PUCCH transmission is not configured for any carrier, the UE may consider transmissions in non-supplementary UL carriers to have a higher priority.

[0331] Transmit power control process

[0332] Figure 8 An example of a process for controlling uplink transmission power is illustrated.

[0333] First, the UE may receive parameters and / or information related to transmit (Tx) power from the BS (S805). In this case, the UE may receive the corresponding parameters and / or information through higher layer signaling (e.g., RRC signaling or MAC-CE). For example, regarding PUSCH transmission, PUCCH transmission, SRS transmission, and / or PRACH transmission, the UE may receive parameters and / or information related to transmit power control (e.g., Table 11 or Table 12).

[0334] Afterwards, the UE may receive a TPC command related to transmission power from the BS (S810). In this case, the UE may receive the corresponding TPC command via lower layer signaling (e.g., DCI). For example, regarding PUSCH transmission, PUCCH transmission, and / or SRS transmission, the UE may receive information regarding the TPC command via the TPC command field of a predefined DCI format to determine the power control adjustment state as described above. However, in the case of PRACH transmission, the corresponding steps may be omitted.

[0335] Thereafter, the UE may determine (or calculate) the transmission power for uplink transmission based on the parameters, information, and / or TPC command received from the BS (S815). For example, the UE may determine the PUSCH transmission power, PUCCH transmission power, SRS transmission power, and / or PRACH transmission power based on the above method (e.g., Equation 3 or Equation 4). And / or in the case of carrier aggregation, when two or more uplink channels and / or signals need to be transmitted overlappingly, the UE may determine the transmission power for uplink transmission by considering the priority described in 5).

[0336] Thereafter, the UE may perform transmission of one or more uplink channels and / or signals (eg, PUSCH, PUCCH, SRS, or PRACH) to the BS based on the determined (or calculated) transmission power S820.

[0337] Power Headroom Reporting [TS 38.213, TS 38.321, TS 38.331]

[0338] The UE performs power headroom reporting to provide the following information to the BS.

[0339] - Type 1 power headroom: the nominal maximum transmit power of each activated serving cell (e.g., P CMAX (i) The difference between the configured UE transmission power or the configured maximum output power of the UE) and the estimated UL-SCH / PUSCH transmission power

[0340] - Type 2 power headroom: The estimated transmit power of PUCCH and UL-SCH / PUSCH sent on the SpCell of another MAC entity (i.e., the E-UTRA MAC entity in EN-DC) divided by the nominal maximum transmit power (e.g., P CMAX (i) or the difference between the configured UE transmission or the configured maximum output power of the UE)

[0341] - Type 3 power headroom: the nominal maximum transmit power of each activated serving cell (e.g., P CMAX (i) The difference between the configured UE transmission power or the configured maximum output power of the UE) and the estimated transmission power of the SRS

[0342] When the UE configures two uplink carriers in the serving cell and determines the type 1 power headroom report and the type 3 power headroom report in the corresponding serving cell,

[0343] -When Type 1 power headroom reporting and Type 3 power headroom reporting are determined based on actual transmission or reference transmission, the UE may perform Type 1 power headroom reporting. Or,

[0344] When one of a Type 1 power headroom report or a Type 3 power headroom report is determined based on a reference transmission, the UE may perform a power headroom report (eg, Type 1 or Type 3) determined based on an actual transmission.

[0345] Furthermore, the virtual PH in the present disclosure may mean a type 1 power headroom, a type 2 power headroom, and / or a type 3 power headroom determined based on a reference transmission.

[0346] Type 1 PH report

[0347] When the UE performs Type 1 power headroom on the activated serving cell based on actual PUSCH transmission (in PUSCH transmission opportunity (i) on activated UL BWP (b) of carrier (f) on serving cell (c)), Type 1 power headroom (i.e., PH type1b，f，c (i, j, q d, l)) can be determined by Equation 5.

[0348] [Equation 5]

[0349]

[0350] When the UE performs Type 1 power headroom on the activated serving cell based on the reference PUSCH transmission (in PUSCH transmission opportunity (i) on the activated UL BWP (b) of the carrier (f) on the serving cell (c)), the Type 1 power headroom (i.e., PH) can be determined by Equation 6. type1b，f，c (i, j, q d , l)).

[0351] [Equation 6]

[0352]

[0353] Type 3PH report

[0354] When the UE performs Type 3 power headroom on the activated serving cell based on actual SRS transmission (in SRS transmission opportunity (i) on the activated UL BWP (b) of the carrier (f) on the serving cell (c)), the Type 3 power headroom (i.e., PH) can be determined by Equation 7. type3b，f，c (i,q s )).

[0355] [Equation 7]

[0356] PH type3，b，f，c (i,q s )=P CMAX，f，c (i)-{P O_SRS，b，f，c (q s )+10log 10 (2 μ ·M SRS，b，f，c (i))+α SRS，b，f，c (q s )·PL b，f，c (q d )+h b，f，c (i)}[dB]

[0357] When the UE performs Type 3 power headroom on the activated serving cell based on the reference SRS transmission (in SRS transmission opportunity (i) on the activated UL BWP (b) of the carrier (f) on the serving cell (c)), the Type 3 power headroom (i.e., PH) can be determined by Equation 8. type3b，f，c (i,q s )).

[0358] [Equation 8]

[0359]

[0360] Power headroom reporting process

[0361] The BS uses PHR-Config to configure the UE to perform power headroom reporting, which is described in TS 38.331 and shown in Table 13 below.

[0362] [Table 13]

[0363]

[0364] Each field in Table 13 can be defined as follows.

[0365] "dummy": This field is not used in this version of the specification and the UE ignores the received value.

[0366] "multiplePHR": Indicates whether the power headroom should be reported using a single-entry PHR MAC control element or a multiple-entry PHR MAC control element as defined in TS 38.321 [3]. True means using a multiple-entry PHR MAC control element, and False means using a single-entry PHR MAC control element as defined in TS 38.321 [3]. The network configures this field to be true for MR-DC and UL CA for NR, and false in all other cases.

[0367] "phr-ModeOtherCG": Indicates the mode (i.e., real or virtual) of PHR for activated cells that are part of other cell groups (i.e., MCG or SCG) when DC is configured. If the UE is configured with only one cell group (no DC), this field is ignored.

[0368] "phr-PeriodicTimer": The value in number of subframes of the PHR report as specified in TS 38.321 [3]. A value of sf10 corresponds to 10 subframes, a value of sf20 corresponds to 20 subframes, and so on.

[0369] "phr-ProhibitTimer": the value in number of subframes of the PHR report as specified in TS 38.321 [3]. The value sf0 corresponds to 0 subframes, the value sf10 corresponds to 10 subframes, the value sf20 corresponds to 20 subframes, and so on.

[0370] "phr-Tx-PowerFactorChange": The value in dB for the PHR report as specified in TS 38.321 [3]. A value of dB1 corresponds to 1 dB, dB3 to 3 dB, and so on. The same value applies to each serving cell (although the associated functionality is performed independently for each cell).

[0371] "phr-Type2OtherCell": If set to true, the UE shall report PHR Type 2 for the SpCell of another MAC entity. See TS 38.321 [3], clause 5.4.6. If the UE is not configured with an E-UTRA MAC entity, the network shall set this field to false.

[0372] If certain events as described in Table 14 below occur, a power headroom report (PHR) may be triggered.

[0373] [Table 14]

[0374]

[0375]

[0376] Assume that uplink transmission resources for new transmissions are allocated to the UE's MAC entity as described in Table P6. In that case, the UE can send the power headroom and / or PCMAX corresponding to Type 1 PHR, Type 2 PHR, and / or Type 3 PHR to the BS by including the power headroom and / or PCMAX in the MAC-CE. Detailed conditions and steps related to transmission are shown in Table 15.

[0377] [Table 15]

[0378]

[0379]

[0380] As described above, the UE can transmit the value (e.g., power headroom and / or PCMAX) for Type 1 / 2 / 3 power headroom reporting from the physical layer of the UE to the MAC layer using information pre-configured by the BS, and the MAC layer can deliver / report the value (e.g., power headroom and / or PCMAX) received (i.e., delivered) from the physical layer as described in Tables 14 and 15 to the BS through MAC-CE (e.g., single-entry PHR MAC CE or multi-entry PHR MAC CE). For example, Figure 9 In step S920 , a MAC CE for corresponding power headroom reporting is delivered / reported to the BS, or is sent / reported to the BS through subsequently performed uplink transmission.

[0381] In addition, when the PHR-related values ​​described in the present disclosure (e.g., all PHR-related values, including changes in corresponding values ​​other than PH and / or virtual PH and / or PCMAX) are sent / delivered / reported (via MAC CE), the corresponding values ​​can be interpreted as being sent / delivered / reported at N bit levels (i.e., N=6).

[0382] The above content (e.g., 3GPP system, CSI-related operations, etc.) can be applied in combination with the method proposed in this disclosure, or can be supplemented to clarify the technical features of the method proposed in this disclosure. In addition, in this disclosure, " / " can represent including (and) all contents separated by the separated content (or) / or including only a part of the separated content (or). In addition, in this disclosure, for the convenience of explanation, the following terms are used uniformly.

[0383] <CSI Reporting Based on Type II CSI Codebook>

[0384] In the above-mentioned wireless communication environment, in order to accurately and efficiently provide channel state information (CSI, hereinafter referred to as CSI) feedback in terms of feedback overhead, high-resolution feedback methods such as linear combination (LC) and covariance matrix feedback are being considered. Specifically, in the NR (New RAT) system, Type II CSI feedback considers the "DFT-based compression" method described in Table 16 as a method of combining beams (e.g., amplitude and / or phase-based beam combining) in a subband (SB) wide width with respect to W1 consisting of L orthogonal DFT beams corresponding to wideband (WB) information.

[0385] Table 16 shows an example of a DFT-based compression scheme from the perspective of reducing CSI reporting overhead based on a rank 1-2 type-II CSI codebook.

[0386] [Table 16]

[0387]

[0388]

[0389] In addition, a method for extending the DFT-based compression method to the case of RI = 3-4 is also considered. In conjunction with the agreement that the maximum number of total non-zero (NZ) coefficients across all layers can be less than or equal to 2K0 (where the K0 value (i.e., beta β) is set for RI∈{1,2}), the method for determining the number of non-zero (NZ) coefficients for each layer can be selected from the following examples (Alt0 / Alt1).

[0390] Alt0. As long as K NZ，iis unrestricted

[0391] Alt1. As long as K NZ，i ≤KO is unrestricted

[0392] When the parameter p = v0 for RI = 3 - 4 is set as a higher layer together with the parameter p = v0 for RI = 1 - 2, Table 17 below can be supported.

[0393] The parameters (y0, v0) can be selected from

[0394] [Table 17]

[0395]

[0396] The above description involves expressing channel information by using bases such as DFT or codebooks for the spatial domain (SD) and frequency domain (FD) information of CSI. The size of the total feedback reported is affected by the number of beams to be combined, the quantization number for the combining coefficients, the size of the subbands, etc., and in CSI feedback, when the UE reports information to the base station, most of the payload is generated. Here, consists of the linear combination coefficients of the SD / FD codebooks in the DFT-based compression scheme and can be represented by a matrix of size 2LxM.

[0397] In particular, when the rank exceeds 1, it is necessary to specify the SD / FD compression codebook separately for each layer, or even if the same codebook is applied to all layers, since the channel information is configured in the overlapping sum of SD and FD for each layer of the codebook, as the rank increases, the channel state information that needs to be fed back also increases linearly.

[0398] In NR, traditionally, in the case of CSI feedback between a single base station and a UE, for example, using CSI reporting on PUSCH, the CSI components (or parameters) are divided into Part 1 and Part 2 so that the CSI components can be sent based on the feedback resource capacity allocated to UCI, and by omitting the channel state information according to the priority level in each part, the requirement for the number of UE CSI feedback resources can be met.

[0399] However, different from the traditional method of reporting the linear combination (LC) coefficients of the spatial domain beams for each subband (SB), an enhanced type II CSI codebook newly considered in NR is used in the frequency domain of the corresponding subband. Therefore, since it is impossible to directly reuse the existing CSI omission operations, the CSI omission method needs to be reconsidered according to the CSI codebook design.

[0400] <Contents related to UCI parameters> ​

[0401] The UCI constituting the Type II CSI report may include the parameters shown in Table 18.

[0402] Table 18 shows an example of parameters constituting UCI part 1 and part 2. UCI part 1 may mean part 1 CSI, and UCI part 2 may mean part 2 CSI.

[0403] [Table 18]

[0404]

[0405] Each parameter constituting the UCI will be described.

[0406] RI(∈{1,…,RI MAX}) and K NZ，TOT (The total number of non-zero coefficients summed over all layers, where K NZ，TOT ∈{1, 2, ..., 2K0}) are reported in UCI Part 1.

[0407] In RI=3-4, bitmaps are reported in UCI part 2, and the size of each bitmap is 2LM i (i=0, 1, .., RI-1, where i represents the i-th layer).

[0408] The following FD basis subset selection schemes are supported:

[0409] - In N3≤19, one-step free selection is used.

[0410] - In N3>19, window-based IntS and fully parameterized M initial Indicates the FD base mod(M initial +n, N3), n=0, 1, ..., N3′-1. where α is set to the higher layer from two possible values.

[0411] - The second step subset selection is indicated by the X2 bit combination indicator in UCI part 2 (for each layer).

[0412] In SCI for RI=1, the strongest coefficient indicator (SCI) is -Bit indicator.

[0413] In SCI with RI>1 (reported in UCI Part 2), SCI by layer i That is bits (i=0, 1, (RI-1)). Before index remapping, the position (index) of the strongest LC coefficient of layer i is and Not reported.

[0414] For SCI (RI > 1) and FD basis subset selection indicators, the schemes described in Table 19 below are supported

[0415] [Table 19]

[0416]

[0417]

[0418] <CSI omission related content>

[0419] When the uplink resources allocated for UCI are not sufficient for a complete CSI report, CSI omission can occur. CSI omission can be represented as UCI omission. When CSI omission (omission) occurs, the selected UCI omission scheme needs to meet the following criteria. i) CSI calculation is the same as in the case without omission (the same). Otherwise, when UCI omission occurs, the UE will eventually recalculate CSI. When UCI omission occurs, after the omission, the relevant CQI may not be calculated conditionally in the PMI. ii) The occurrence of UCI omission can be inferred from the relevant CSI report without additional signaling. iii) The UCI payload obtained after the omission does not have to be ambiguous (due to payload ambiguity, the base station needs to perform blind decoding of UCI part 2). iv) When CSI omission occurs, all NZCs associated with / related to any specific layer should not be discarded.

[0420] The non-zero LC coefficients (NZCs) associated with / related to layer λ ∈ {0, 1,..., RI - 1}, beam l ∈ {0, 1,..., 2L - 1}, and FD basis m ∈ {0, 1,..., M - 1} can be represented by represented.

[0421] For the purpose of UCI omission, the parameters of UCI part 2 can be divided into 3 groups, and group (n) has a higher priority than group (n + 1) (n = 0, 1).

[0422] When the UE is configured to report N Rep CSI reports, group 0 includes at least the SD rotation factors, SD indicators, and SCI for all N Rep reports. For each in the N Rep reports, group 1 can include at least the reference magnitudes for the weaker polarization and FD indicators. For each report, group 2 includes at least where G1 and G2 exclude the indices related to the strongest coefficients.

[0423] The priority rules for determining G1 and G2 can be selected from the following Alt 1.1 to Alt 1.3:

[0424] Alt 1.1: LC coefficients can be prioritized from high priority to low priority according to (λ, l, m). (Index triples, The highest priority coefficient belongs to G1, and The lowest priority coefficient belongs to G2. The priority level can be calculated according to Prio(λ, l, m) = 2L.RI.Perm1(m) + RI.Perm2(L) + λ.

[0425] Alt 1.2: Non-zero coefficients The C coefficients are sorted in order from 0 to KNZ-1 based on λ->1->m index (layer->SD->FD), or the C coefficients are sorted in order based on 1->λ->m index (SD->layer->FD). Group G1 includes at least the first sorting coefficients, and group G2 includes the remaining second sorting coefficients.

[0426] Alt 1.3: LC coefficients can be prioritized from high priority to low priority according to the (λ, l, m) index triplet. ( The highest priority coefficient belongs to G1, and The lowest priority coefficient belongs to G2. The priority level can be calculated according to Prio(λ, l, m) = 2L.RI.Perm1(m) + RI.Perm2(l) + λ.

[0427] The group to which you belong is selected from the following (Alt 2.1-Alt 2.6).

[0428] Alt 2.1: (coupled only with Alt 1.1), according to Prio(λ, l, m), first The bit belongs to group 1, and according to Prio(λ, l, m), finally The bits belong to group 2.

[0429] Alt 2.2: (Coupled with Alt 1.2 only) The bitmap and coefficients are segmented into M segments (M = number of FD base indices). Group 1 contains M1 segments, and group 2 contains M2 segments. Here, M = M1 + M2.

[0430] Each segment includes bitmaps (sub-bitmaps) associated with / involving all RI layers, bitmaps (sub-bitmaps) associated with / involving all SD components and a single FD component, and corresponding combining coefficients. The payload size of Group 1 is given as (N = number of bits used for amplitude and phase). The payload size of Group 2 is given by given.

[0431] Alt 2.3: (coupled only with Alt 1.3), according to the Prio(λ, l, m) value, the first The bit belongs to group 1, and according to the Prio(λ, l, m) value, the last The bits belong to group 2.

[0432] Alt 2.4: (coupled only with Alt 1.1), the first RI.LM bit belongs to group 1 according to the Prio(λ, l, m) value, and the last RI.LM belongs to group 2 according to the Prio(λ, l, m) value.

[0433] Alt2.5: (Works with any Alt1.x) Bitmap Included in Group 0.

[0434] Alt 2.6: (Works with any Alt 1.x) Bitmap Included in Group 1.

[0435] As mentioned above, the CSI report via PUSCH may consist of UCI Part 1 and UCI Part 2. UCI Part 1 includes RI and the number of non-zero wideband (WB) amplitude coefficients (K NZ ), and UCI part 2 includes information about the PMI of wideband (WB) / subband (SB). The parameters (components) included in UCI part 1 can be the parameters (components) of part 1 CSI, and the parameters (components) included in UCI part 2 can be the parameters (components) of part 2 CSI. In this case, the payload of UCI part 1 is fixed, while the payload of UCI part 2 is fixed according to RI and K. NZ Therefore, in order to determine the payload of UCI part 2, the base station needs to first decode UCI part 1 to calculate RI and K NZ Therefore, UCI omission may have to be performed in UCI part 2. In the following, UCI omission may be replaced / used interchangeably with CSI omission.

[0436] When the precoding matrix indicator (PMI) payload used for Type II CSI feedback varies significantly depending on the RI, there may be a problem in not being able to include all the corresponding information within the limited reporting container size when reporting CSI using PUSCH resources. In addition, since the RI is set by the UE based on the base station, there may be limitations in scheduling resource allocation by accurately predicting the PMI payload used for CSI reporting.

[0437] To address this issue, in the prior art, a method of using multiple report settings for multiple component carriers (CCs) that discard Part 2 CSI according to a predetermined priority rule is used during the CSI omission process. The base station can calculate the corresponding information based on the received PMI by estimating the remaining omitted subband (SB) PMI using an interpolation method. In order to actually determine the payload of UCI Part 2 transmitted by the UE, the base station performs the same CSI omission process as the UE until the UCI code rate reaches a specific level. Therefore, only when a common method for CSI omission is set / defined between the UE and the base station can the UCI Part 2 information be correctly decoded by the base station.

[0438] As can be seen in the above “CSI reporting related content based on type II CSI codebook”, the enhanced type II CSI codebook can be designed by considering frequency domain (FD) compression for multiple subband (SB) CSI using a basis such as DFT. That is, it is possible to approximate the information about the linear combination of the SD basis (W1) and the FD basis (Wf) predetermined or set by the UE and the base station. To represent the radio channel information, the UE can send the configuration information for the codebook and CSI reporting is performed using the 2LxM complex-valued LC coefficients (e.g., the number of SD components (or bases) (2L) × the number of FD components (or bases) (M)) that differ from the existing PMI for each SB. That is, since the base station cannot know the distribution of the SD basis, FD basis, and corresponding LC coefficients according to the layer before decoding the UCI Part 2 information, the above-mentioned problem cannot be solved by reusing the conventional CSI omission rule / method.

[0439] However, when the base station and the UE guarantee an omission method for the LC coefficients and the corresponding bitmap based on the enhanced type II codebook design, the base station sequentially applies omission until the UCI code rate reaches a specific threshold code rate, and thus, the CSI omission level performed by the UE can be estimated. Therefore, the present disclosure aims to propose a CSI omission (omission) method (in UCI part 2) in the enhanced type II CSI codebook.

[0440] In this disclosure, it is assumed that the Type II CSI codebook (including the enhanced Type II CSI codebook) includes an SD basis correlation matrix, an FD basis correlation matrix, and an LC coefficient matrix. The LC coefficient matrix may also include amplitude coefficients and phase coefficients. The codebook may be replaced by terms such as precoder or precoding matrix, and the basis may be replaced by terms such as basis vector, vector, and component. In addition, for ease of description, the spatial domain is represented as SD, and the frequency domain is represented as FD.

[0441] For example, the codebook can be composed of Indicates that, where W1 represents the SD basis correlation matrix, represents the LC coefficient matrix, and represents the FD basis correlation matrix. It can be expressed as a matrix of size 2LxM. Here, 2L represents the number of SD bases (here, L is the number of beams / antenna ports in SD. Considering polarization, the total number of SD bases can be 2L), and M represents the number of FD bases. For ease of description, the following description will be based on the Type II CSI codebook.

[0442] <Proposal 1: Implicit CSI Omission Method>

[0443] When the UE receives Type II CSI set as PUSCH-based reporting and the CSI payload is larger than the allocated resource capacity, for UCI Part 2 (ie, Part 2 CSI) information configuration, omission elements and omission methods can be set / defined in a predefined manner.

[0444] In the above scheme, when a UE wishes to report CSI to the base station, if the corresponding PUSCH resource capacity does not meet the CSI load, some or all of the UCI Part 2 components of the CSI are discarded to allow the UE to transmit channel information to the base station within the available resource capacity. In addition, the base station can be informed whether the UE configures UCI by performing CSI omission.

[0445] As described above, UCI part 2 may include information such as a bitmap for each layer, an SD / FD base indicator, an LC coefficient (amplitude / phase) for each layer, and an SCI (strongest coefficient indicator) for each layer. For example, information about the LC coefficient may include an indicator indicating the amplitude coefficient and an indicator indicating the phase coefficient. In addition, the bitmap information for each layer may be bitmap information for indicating an indicator indicating the amplitude coefficient to be reported and an indicator indicating the phase coefficient. In this case, the information about the LC coefficient (amplitude coefficient / phase coefficient) and the bitmap information corresponding thereto may have the greatest impact on the payload size in the component. Therefore, it is necessary to specify an omission method for these parameters (components) (e.g., amplitude coefficient, phase coefficient, bitmap, etc.), and the omission method may be configured by utilizing SCI for each layer.

[0446] Since the SCI information is included in UCI Part 2, the base station may not know its value before decoding UCI Part 2 based on the UCI Part 1 information. However, in the case of RI>1 where CSI omission can be applied, as described in "UCI parameter related content", when performing index remapping based on the FD basis and the LC coefficient in the frequency domain of each layer, SCI needs to be present. (the matrix of LC coefficients) in the first column (i.e., column index = 0), and can be used only for row indices with For example, it can be expressed as Figure 8 Indicated in .

[0447] Figure 9 Based on SCI Example of index remapping. Figure 9 A shows SCI index in , and Figure 9 B shows the SCI index after index remapping. Figure 9 This is just an example for description purpose and does not limit the technical scope of the present disclosure. Figure 9 , a matrix consisting of LC coefficients With size {2LxM}. For example, in a type II codebook where L=4 and M=10 parameters are set, the LC matrix Can be configured in an 8×10 matrix. Figure 9 As shown in A, assuming the strongest coefficient is at position (5, 6), the corresponding index is remapped as Figure 9 B, and may be set to a value corresponding to SCI=5 (ie, the index of the row of SCI after remapping) and reported.

[0448] Therefore, compared with other LC coefficients, the LC coefficients corresponding to the FD basis and the SD basis corresponding to the SCI may have a greater impact on the CSI accuracy. Thus, it is possible to configure the omission priority by distinguishing the degree of discarding of specific components in UCI omission.

[0449] Here, it is important to note that even if the SCI value included in UCI Part 2 is unknown, in a state where the base station and the UE agree on a method for selecting a bitmap / LC coefficient based on the SCI, the base station can be adjusted to apply the omitted code rate so that UCI Part 2 can be correctly decoded. Therefore, for the listed bitmap and LC coefficients, the decoded SCI indicates The correct value is possible.

[0450] Hereinafter, regarding a UCI omission method of an enhanced type-II CSI codebook proposed in the present disclosure, a method of performing UCI omission based on SCI for each layer will be described in detail.

[0451] Proposal 1-1: We propose a method to set omitted elements (eg, bitmap, LC coefficients, etc.) and omitted schemes in the frequency domain for the UCI part 2 information configuration of Type II CSI.

[0452] 1) Method 1

[0453] Consider the case where, assuming that the number of components (or bases) of the frequency domain FD is M, M' components are selected and reported among them, and the remaining components are omitted. For example, in the frequency domain (FD), it is used to report the FD base (index = 0) corresponding to the SCI that belongs to the index = M'-1 (M' < M) continuous or specific rule set. The LC coefficients of the columns are reported, and the bitmap size can be set to be as many as the number. That is, the bitmap size can be determined based on the number of reported LC coefficients. In particular, when the delay profile shape is taken into consideration, the bitmap size is selected. When the columns are arranged, it can be configured in such a way that M' / 2 segments are selected starting from index = 0, and the remaining M' / 2 segments are selected in reverse order from index = M-1.

[0454] Figure 10 An example of setting three levels of omission priority based on FD and a pair of SD bases is shown. Figure 10 , a case where the SD beam index is set to "SD index = 5 / paired SD index = 1" is shown as an example. As will be described later, the priority level for the SD index may also be configurable. Figure 10 This is only an example for the convenience of description and does not limit the technical scope of the present disclosure.

[0455] Figure 10 Shown in Figure 9 Under the same parameter settings, it belongs to M' consecutive starting from the above FD index = 0 This is an example of a method in which the LC coefficients of a column are used for reporting and the other LC coefficients are discarded. While the degree of discarding is exemplified using a specific equation, it means that priority levels that meet resource capacity are represented as 0, 1, 2, etc., and are set to report as many LC coefficients as possible. That is, to perform CSI reporting within the allocated resource capacity, UCI is configured from priority level 0 so that as many LC coefficients as possible can be reported. However, when resource capacity is insufficient, LC coefficients of lower priority can be configured and reported.

[0456] 2) Method 1-1

[0457] As described in the above-mentioned CSI report-related content based on the Type II CSI codebook, CSI omission-related content, etc., UCI omission for one of the two groups can be performed by dividing the linear combination coefficients (LCC) to be transmitted and the LC coefficients to be discarded into two groups (e.g., G1 and G2). In the case of performing UCI omission. UCI omission of one of the two groups can be performed by dividing it into two groups (e.g., G1 and G2). For example, one group can be discarded / omitted based on the priority of the group. In this case, the priority level for determining which group a specific LC coefficient belongs to can be expressed as Equation 9. The priority level can also be expressed as a priority value.

[0458] [Equation 9]

[0459] Prio(λ,l,m)=2L·RI·Perm1(m)+RI·Perm2(l)+λ

[0460] Here, λ is the layer index, 1 is the SD base index, and m is the FD base index. Equation 3 may assume that the LC coefficients are prioritized in the order of i) layer, ii) SD index, and iii) FD index. Furthermore, Perm1() and Perm2() indicate the permutation schemes used for the FD and SD indexes, respectively. The lower / smaller Prio() (i.e., priority level) in Equation 3, the higher the priority of the corresponding LC coefficient.

[0461] Specifically, based on the priority given to each LC coefficient, the one with high priority The LC coefficients are included in the group with high priority (e.g., G1), and the remaining The LC coefficients are included in a group with a low priority (e.g., G2). Here, yes The total number of non-zero LC coefficients. When CSI omission is performed, groups with lower priority can be omitted first. As an example, G2 including LC coefficients with low priority can be omitted earlier than G1. In other words, LC coefficients with high priority are reported, and LC coefficients with low priority can be omitted.

[0462] In the omission operation in the spatial region to be described later, Equation 9 and related descriptions may also be referred to / used.

[0463] As described above, in the frequency domain (FD) of Proposal 1-1, the column corresponding to the SCI is positioned at column 0 by one or more modulo operations. It is possible to process how the SCI information can be reflected in the priority level (or priority value) equation. That is, a method for performing CSI omission based on the SCI for each layer can be considered. The FD index can be permuted based on the following methods 1) / 2) / 3), and UCI omission can be performed by calculating the priority (FD) in the frequency domain.

[0464] 1) Based on the 0th column (i.e., based on the column to which SCI is applicable), the permutation scheme can be configured in ascending order. That is, it can be applied to the above equation 9 as Perm1(m)=m. For example, when M=8, the method of arranging in ascending order can be expressed as [0, 1, 2, 3, 4, 5, 6, 7]. The priority level (i.e., Prio()) when m=0 can be the lowest, and the priority level when m=7 can be the highest. In other words, the priority when m=0 can be the highest, and the priority when m=7 can be the lowest. LC coefficients where m corresponds to 0 to 3 can be included in a high priority group (e.g., the first group G1), and LC coefficients where m corresponds to 4 to 7 can be included in a low priority group (e.g., the second group G2).

[0465] 2) The permutation scheme may be configured taking into account the delay distribution for the channel in terms of FD.

[0466] Figure 11 An example of a delay profile of a radio channel is shown. Figure 11 This is just an example for the convenience of description and does not limit the technical scope of the present disclosure. Figure 11 , the delay distribution of the radio channel can be represented by two cases. Specifically, it may typically occur that i) based on the FD basis corresponding to FD index = 0, the subset needs to be configured with a basis of increasing indexes ( Figure 11 (a)), or ii) based on the FD base corresponding to FD index = 0, the subset needs to be configured by considering both increasing and decreasing the index ( Figure 11 (b)).

[0467] Therefore, from the set of all M FD bases Starting from the 0th FD column, a configuration method of the base that evenly reflects left and right (i.e., index increases and decreases) is required. That is, the base index can be alternately selected based on index 0. For example, +1, -1, +2, -2, .. can be selected by crossing with 0. Alternatively, the selection can be alternately selected based on 0 (e.g., +1, -1, +2, -2, ..). Alternatively, the base index can be alternately (crosswise) selected using a cyclic shift.

[0468] As a specific example, the FD index [0, 1, 2, 3, 4, 5, 6, 7] in the case of M = 8 can be alternately (crosswise) selected based on the FD index = 0 according to the above method. For example, the index (such as [0, 7, 1, 6, 2, 5, 3, 4]) can be remapped, i.e., permuted, so that the priority value can be determined. The LC coefficient corresponding to the FD index [0, 7, 1, 6] can be included in a group with a high priority (e.g., G1), and the LC coefficient corresponding to [2, 5, 3, 4] can be included in a group with a low priority (e.g., G2).

[0469] Alternatively, as an example, the index may be remapped to [0, 1, 7, 2, 6, 3, 5, 4], and if it is expressed in a matrix form (Ax=b), it may be expressed as the matrix of the following Equation 10. Here, A represents Perm1(), x represents an FD index, and b represents an FD index to which permutation is applied.

[0470] [Equation 10]

[0471]

[0472] That is, based on the permutation (i.e., remapping index), the priority level (i.e., Prio()) may be the lowest when m=0, and the priority level may be the highest when m=4. In other words, the priority may be the highest when m=0, and the priority may be the lowest when m=4.

[0473] Although the above-mentioned delay profile omission method is excellent in terms of performance, it may be necessary to include a 1-bit indication of the delay profile shape in UCI part 2 group 0. In other words, a 1-bit indication is required to indicate / set which delay profile the UE follows (e.g., Figure 11 A or 11B).

[0474] 3) As a method of ensuring CSI performance to a certain extent while avoiding such an increase in signaling payload, an ascending permutation scheme including a -1FD base or a -2FD base can be configured. For example, it can be expressed in the order of [0, 7, 1, 2, 3, 4, 5, 6] according to an ascending permutation scheme including a -1FD base. For example, it can be expressed in the order of [0, 7, 6, 1, 2, 3, 4, 5] according to an ascending permutation scheme including a -2FD base. That is, at least one of the -1FD base or the -2FD base can be positioned between the permutations arranged in ascending order.

[0475] As another example, in the permutation configuration, instead of starting with the 0th FD basis, the -1 or -2nd FD basis can be configured as the starting point. The permutation configuration can be expressed as Perm1(m) = (mA) mod M. Here, A can be, for example, a value set by a higher layer or a fixed value such as A = {M-3, M-2, M-1, 0}, and the UE can report the information by including it in UCI Part 2. As an example of this case, when M = 8 and A = M-2, permutation can be performed as in [6 7 0 1 2 3 4 5].

[0476] In the FD region, based on the permutations 1) / 2) / 3) above, UCI omission can be performed according to a method predefined between the base station and the terminal. Alternatively, the base station can set the permutation for the UE. Alternatively, the UE can report the permutation applied to UCI omission to the base station along with the CSI report.

[0477] Based on the above permutation scheme, the priority level of the LC coefficients can be calculated, and the LC coefficients can be divided into multiple groups based on the priority of the LC coefficients. According to the priority of the group, the LC coefficients of the lower group can be omitted. That is, the omission can be performed according to the priority of the LC coefficients and reported to the base station.

[0478] Proposal 1-2: We propose a method to set the omitted elements (eg, bitmap, LC coefficients, etc.) and the omitted scheme in the spatial domain for the UCI Part 2 information configuration of Type II CSI.

[0479] 1) Method 1

[0480] In terms of the spatial domain (SD), in a manner similar to Proposal 1-1, it is possible to set the LC coefficients belonging to two rows by using the SD basis corresponding to the SCI and the SD basis as a pair in terms of the antenna port, and the bitmap size can be set to be as many as the number. Alternatively, it can be used to operate by using the ±M'SD basis based on a specific SD basis, or to report the LC coefficients belonging to the specific rule. The LC coefficients of the rows of the set.

[0481] Figure 12 An example of setting the omission priority in the SD aspect with a single FD basis is shown. Figure 12 This is just an example for the convenience of description and does not limit the technical scope of the present disclosure. Figure 12 In the example, it is assumed that SCI index = 5.

[0482] Reference Figure 12, it is possible to operate in a method of reporting the LC coefficients included in the beam index (index = 1) set in the paired antenna port based on the SCI (index = 5) and discarding / omitting other values. In addition, as the number of rows to be reported (to be used) decreases, different priorities can be set. For example, the case of reporting a paired SD base can be set to priority 0, and the case of reporting a single SD base can be set to priority 1, and the priority levels can be set. When it is impossible to report an SD base corresponding to priority 0 within the allocated resource capacity (i.e., when it is impossible to report a paired SD base), an SD base corresponding to priority 1 (i.e., a single SD base) can be reported.

[0483] 2) Method 1-1

[0484] Similar to the method of Proposal 1-1 above, a method of performing permutation in the SD domain by taking SCI into account in the permutation scheme can be considered. It can be said that the influence of the SD beam corresponding to the value indicated by the SCI is most significantly reflected in the spatial domain SD of Proposal 1-2, so permutation schemes such as the following 1) / 2) / 3) can be considered.

[0485] 1) A method of applying permutation in the spatial region SD regardless of the SCI, that is, the permutation scheme may be configured in ascending order based on row 0. That is, it may be applied to the above Equation 9 as Perm2(l)=l.

[0486] 2) The permutation scheme may be configured so that the index is mapped to the 0th row in the row to which the SCI belongs by a modulo operation by reflecting the SCI information. That is, it may be applied as Perm2(l)=(l-SCI)mod2L. Here, l represents the SD basis index, and L represents the number of SD basis vectors. For example, in Figure 19 In the example, when L=4 and SCI=5, the 6th row (SD index=5) is remapped to the 0th index due to the Perm2(l) operation, and the same applies to other SD indexes, so the index can be reset using a cyclic shift. For example, the row index can be reset to [5, 6, 7, 0, 1, 2, 3, 4]. Therefore, since the case of remapping the row index 4 has a low priority, it can be omitted first.

[0487] 3) A method of permuting the SD index by which the SCI and the corresponding specific value (SCI_pair) are preferentially assigned can be configured. Here, SCI_pair indicates an index having opposite polarization relative to the SD beam corresponding to the SCI. For example, in the case of L = 4, SCI = 5 indicates a second SD beam having a [+45° tilt angle], and the corresponding SCI_pair is an index having the opposite polarization as the second SD beam having a [-45° tilt angle], that is, an SD index "1". Therefore, for a specific SCI, it can be determined as SCI_pair = (SCI-L) mod2L.

[0488] Since SCI_pair shares the same SD beam as SCI, it is likely to include many LC coefficients that affect CSI accuracy. Therefore, if the rows corresponding to SCI and the rows corresponding to SCI_pair are mapped to the 0th index and the 1st index and given priority levels, it may be effective in reducing the loss of CSI accuracy while performing UCI omission. To this end, the SD permutation embodiment for this can be expressed as using Figure 12 Perm2(l)=A t and related descriptions. Here, x∈R 2L-2 : ascending vector (excluding SCI and SCI_pair).

[0489] That is, in the above embodiment, it can be expressed as

[0490] In the SD region, based on the permutation methods 1) / 2) / 3) above, UCI omission can be performed according to a method predefined between the base station and the terminal. Alternatively, the base station can configure the permutation method for the UE. Alternatively, the UE can report the permutation method applied to UCI omission to the base station along with the CSI report.

[0491] That is, the omission in the FD aspect of Proposal 1-1 and the omission in the SD aspect of Proposal 1-2 can operate independently or in a cross-form, and the configuration according to this point will likely have a higher layer of configuration or predefinition.

[0492] For example, in Equation 9, the permutation scheme in FD can be performed by one of the methods described in Proposal 1-1, and the permutation scheme in SD can be performed by one of the methods described in Proposal 1-2, and the priority level can be calculated by considering the two permutations in SD and SD. As a specific example, as a permutation scheme in FD, a method of alternately selecting a base index based on index 0 (for example, alternating selection based on example 0, such as +1, -1, +2, -2, ...) can be applied, and a permutation scheme in SD, that is, a method of selecting an index in ascending order based on row 0 can be applied. The UE can perform CSI omission considering the calculated priority step, and can configure the UCI to satisfy the resource size allocated for CSI reporting and transmit the UCI to the base station.

[0493] <Proposal 2: Explicit CSI Omission Method>

[0494] When the UE receives Type II CSI for PUSCH-based reporting and the CSI payload is greater than the allocated resource capacity, the UE may perform a UCI omission operation, and the UE may consider a method of setting components of the UCI part 2 information and an omission method through information related to UCI omission (e.g., an indicator).

[0495] In the scheme of Proposal 1, if the degree of CSI omission is implicitly estimated by applying the same set / defined omission method until the UCI code rate (code rate) meets a specific threshold through the RI of UCI part 1 and the number of non-zero coefficients (NNZC) across layers at the base station side, then in Proposal 2, a method in which the UE includes an omission indicator (e.g., UCI omission related information) in the UCI part 1 including the operation of Proposal 1 and sends the omission indicator to the base station can be considered.

[0496] Specifically, the presence or absence of UCI omission, which elements of UCI Part 2 become the targets of omission if UCI omission has been performed, how much UCI omission is performed, etc. can be set by a higher layer or set / sent to the base station according to predefined rules. Although Scheme 2 may increase the payload of UCI Part 1 compared to Scheme 1, it has the advantage that the UE and the base station can ensure detailed operations for CSI omission and accurately recognize CSI omission.

[0497] For example, the LC coefficients are configured separately for amplitude and phase, and one of them can be indicated as being dropped / omitted. Alternatively, not only can the omission setting method for FD and / or SD be specified, but it can also be specified by layer-common / layer-group-specific operations that ensure the application of the corresponding operation. Alternatively, configuring UCI Part 2 by adjusting the quantization degree of the amplitude and phase of the LC coefficients can also have a significant effect on payload reduction.

[0498] As an example of setting the components and omission method of UCI part 2 according to information related to UCI omission (e.g., UCI omission indicator), Table 20 shows an example of Type II CSI omission operation according to the UCI omission indicator in the case of layer common.

[0499] [Table 20]

[0500]

[0501] The UE can transmit / configure information (e.g., the omission status of LC coefficients (e.g., amplitude coefficients and phase coefficients), omission priority for frequency domain and spatial domain, and quantization level) to the base station through information related to UCI omission (e.g., an indicator). The base station can clearly identify the UE's UCI omission operation based on the information related to UCI omission.

[0502] Through the above-proposed methods and / or embodiments, the UE can perform UCI omission within the allocated resource capacity and report channel state information to the base station.

[0503] Figure 13 An example of a signaling flow chart between a user equipment (UE) and a base station is shown, to which the methods and / or embodiments proposed in the present disclosure can be applied. Figure 13 It is only for the convenience of description and does not limit the scope of this disclosure. Figure 13 , assuming that the UE and / or base station operates based on the methods and / or embodiments of Proposal 1 and Proposal 2 above, Figure 13 Some of the steps described in the following may be combined or omitted. In addition, in performing the process described below, you may consider / apply Figure 7 CSI-related operations.

[0504] A base station may be an object that refers to transmitting data to a UE and receiving data from a UE. For example, a base station may be a concept including one or more transmission points (TPs), one or more transmission and reception points (TRPs), and the like. In addition, a TP and / or a TRP may include a panel, a transmission and reception unit, and the like of a base station. In addition, a TRP may be classified according to information (e.g., an index, an ID) about a CORESET group (or CORESET pool). As an example, when one UE is configured to perform transmission / reception with multiple TRPs (or cells), this may mean that multiple CORESET groups (or CORESET pools) are configured for one UE. The setting for such a CORESET group (or CORESET pool) may be performed through higher layer signaling (e.g., RRC signaling, etc.).

[0505] The UE may receive configuration information from the BS S1310. In other words, the BS may send the configuration information to the UE. The configuration information may be received via higher layer signaling (e.g., Radio Resource Control (RRC) or Media Access Control-Control Element (MAC-CE)). For example, the configuration information may include (i) CSI-related configuration and (ii) configuration related to transmission power control of uplink channels (e.g., PUSCH / PUCCH). For example, when the configuration information is pre-configured, the corresponding steps may be omitted.

[0506] For example, the configuration related to transmission power control of an uplink channel (eg, PUSCH / PUCCH) may include configuration related to the path loss, maximum output power, and target power described above regarding uplink power control.

[0507] For example, the CSI-related configuration may include information about the period of transmitting the reference signal and time domain behavior information of the reference signal. In addition, the CSI-related configuration may include information about the resource and / or resource set to which the reference signal is transmitted.

[0508] The CSI-related configuration may include information about the CSI reporting settings. For example, whether the CSI report is a PUSCH-based CSI report or a PUCCH-based CSI report may be configured based on the CSI-related configuration. In addition, the CSI-related configuration may include resource allocation information for CSI reporting.

[0509] For example, the CSI-related configuration may include information related to the CSI omission operation of the UE. For example, the CSI-related configuration may include information for determining the priority of the CSI (eg, a permutation method).

[0510] The UE may receive a reference signal (RS) from the base station (BS) S1320. In other words, the base station may send a reference signal to the UE. For example, the reference signal may be received or sent based on configuration information (e.g., CSI-related configuration). For example, the reference signal may be a CSI-RS. The reference signal may be sent from the base station periodically, semi-continuously, or aperiodically. Furthermore, the reference signal may be used for CSI measurement and calculation.

[0511] The UE may measure / calculate CSI (S1325). For example, the CSI may be measured / calculated based on an (enhanced) type IICSI codebook and may include information about a precoding matrix (e.g., PMI, etc.). For example, a precoding matrix based on a linear combination of a basis in the frequency domain and a basis in the spatial domain may be used for CSI calculation. The row index of the precoding matrix may be related to the basis in the spatial domain, and the column index of the matrix may be related to the basis in the frequency domain. The column index of the strongest coefficient indicator (SCI) may correspond to "0".

[0512] CSI includes information about coefficients related to the linear coupling coefficient (e.g., amplitude coefficients, phase coefficients, etc.), for example, information about the amplitude coefficient, information about the phase coefficient, information in the form of a bitmap related to the coefficients (amplitude coefficients and phase coefficients), information about the strongest coefficient for each layer, information based on the spatial domain, information based on the frequency domain, etc.

[0513] The UE may transmit CSI to the BS S1330. In other words, the BS may receive CSI from the UE. For example, the CSI may be transmitted via PUSCH or PUCCH. For example, the transmission power of the PUSCH or PUCCH may be determined based on configuration information. For example, the operation of determining the transmission power may consult or apply Figure 8 The CSI report sent to the BS may consist of a first part and a second part. For example, the first part may correspond to uplink control information (UCI) part 1 (i.e., part 1 CSI), and the second part may correspond to UCI part 2 (i.e., part 2 CSI).

[0514] Resources for CSI reporting can be allocated based on configuration information, and if the capacity of the allocated resources is smaller than the size of the UCI payload (i.e., the CSI payload to be reported), the CSI report can be configured by omitting a portion of the calculated CSI so that the CSI report can be performed within the available resource capacity. For example, based on the priorities of multiple predefined groups, uplink control information (UCI) configured by omitting portions of multiple groups can be transmitted as a CSI report via the PUSCH. For example, some components constituting the second part of the CSI report (i.e., UCI part 2) can be omitted. Operations related to CSI omission can be performed based on the proposed method (e.g., Proposal 1 / Proposal 2).

[0515] For example, each of the information about the amplitude coefficient, the information about the phase coefficient, and the bitmap information related to the coefficient can be classified into multiple groups based on the priority value. The priority value and the priority of each information component can be inversely proportional to each other. That is, as the priority value becomes smaller, the priority of the corresponding component can be higher. For example, according to the priority determined based on the priority value, the components with higher priority among the components of the information about the amplitude coefficient, the information about the phase coefficient, and the bitmap information related to the coefficient can be included in the first group, and the group with lower priority can be included in the second group.

[0516] In addition, when omitting CSI, based on the predefined priorities of multiple groups, groups with lower priorities may be omitted first. For example, the first group may have a higher priority than the second group. Therefore, the second group may be omitted earlier than the first group. In other words, information on amplitude coefficients, information on phase coefficients, and bitmap information with higher priorities may be reported, and the omission (omission) may be performed starting from information with lower priorities.

[0517] The priority values ​​for classifying the components of information about amplitude coefficients, information about phase coefficients, and / or bitmap information associated with the coefficients into a plurality of groups may be determined based on at least one of: i) a layer index, ii) an index of a spatial region associated with / involving each component, or iii) an index of a frequency domain associated with / involving each component. For example, the priority values ​​may be determined based on i) a layer index, ii) an index of a spatial domain associated with / involving each component, and iii) an index of a frequency domain associated with / involving each component.

[0518] For example, the priority value may be increased in the order in which the higher index and the lower index in the frequency domain index associated with / related to the component are sequentially crossed based on the predefined specific index. The predefined specific index may be associated with / related to the index in the frequency domain of the strongest coefficient among the coefficients. For example, the predefined specific index may be "0". This is because the index is remapped so that the index of the strongest coefficient in the frequency domain is located in the first column (i.e., column index = 0).

[0519] As another example, the priority values ​​may increase in ascending order of the indices of the spatial regions. As another example, i) the index of the spatial region of the strongest coefficient and ii) the index of the spatial region corresponding to the beam having the opposite polarization relative to the beam corresponding to the strongest coefficient may have the highest priority (i.e., the priority value may be the smallest). Thereafter, the priority values ​​of the remaining indices may be determined sequentially in ascending order. Alternatively, the indices are remapped so that the index of the spatial region of the strongest coefficient becomes 0, and the remaining indices are also remapped in the form of a cyclic shift, and then the priority values ​​may be determined in the order of the remapped indices.

[0520] As another example, when some (e.g., M') of the basis (or component) (e.g., M) in the frequency domain are reported and the rest are omitted, as many consecutive indices as the basis to be reported may be selected based on the index in the frequency domain of the strongest coefficient (e.g., index = 0), and information about the corresponding coefficients and information in the form of a bitmap corresponding to the coefficients may be reported. As a similar example, when some of the basis (or component) in the spatial domain are reported, the index corresponding to the index in the spatial domain of the strongest coefficient, the coefficient corresponding to the index of the SD basis paired with respect to the antenna port, and information in the form of a bitmap corresponding to the coefficient may be reported (the coefficients corresponding to the remaining SD basis indices and the information in the form of a bitmap corresponding to the coefficient may be omitted).

[0521] For example, the CSI report may also include information indicating a delay profile applied by the UE or information used by the UE to determine a priority for CSI omission (eg, a permutation scheme).

[0522] As described in Proposal 2 above, the CSI report (or UCI) may also include information related to the CSI omission operation. In other words, the UE may explicitly transmit information related to the CSI omission operation to the base station. For example, since the CSI report can be configured by omitting specific groups based on the priority of multiple groups, it may include information related to the specific groups to be omitted. For example, the information related to the CSI omission operation may be transmitted while being included in the first part of the CSI report.

[0523] For example, information related to the CSI omission operation may include information regarding at least one of the following: i) the presence or absence of the omission operation (i.e., whether the UE has performed omission), ii) an omission target, or iii) omission. The UE may transmit / configure information (e.g., coefficient omission status, frequency domain and spatial domain omission priority, and quantization level) to the base station via information related to CSI omission (e.g., an indicator). The base station may clearly identify the UE's CSI omission operation based on the information related to CSI omission.

[0524] Figure 14 An example of an operation flow chart of a UE to which the methods and / or embodiments proposed in the present disclosure can be applied is shown. Figure 14 It is only for the convenience of description and does not limit the scope of this disclosure. Figure 14 , it is assumed that the UE and / or base station operates based on the methods and / or embodiments of Proposal 1 and Proposal 2 above. Figure 14 Some of the steps described in the following may be combined or omitted. In addition, in performing the process described below, you may consider / apply Figure 7 CSI-related operations.

[0525] The UE may receive configuration information from the BS S1410. The configuration information may be received via higher layer signaling (e.g., radio resource control (RRC) or medium access control-control element (MAC-CE)). For example, the configuration information may include (i) CSI-related configuration and (ii) configuration related to transmission power control of uplink channels (e.g., PUSCH / PUCCH).

[0526] For example, the configuration related to transmission power control of an uplink channel (eg, PUSCH / PUCCH) may include configuration related to the path loss, maximum output power, and target power described above regarding uplink power control.

[0527] For example, the CSI-related configuration may include information about the periodicity of transmitting the reference signal and information about the time domain behavior of the reference signal. Furthermore, the CSI-related configuration may include information about the resource and / or resource set to which the reference signal is transmitted. The CSI-related configuration may include information about the CSI report settings. For example, whether the CSI report is a PUSCH-based CSI report or a PUCCH-based CSI report may be configured based on the CSI-related configuration. Furthermore, the CSI-related configuration may include resource allocation information for the CSI report.

[0528] For example, the CSI-related configuration may include information related to the CSI omission operation of the UE. For example, the CSI-related configuration may include information for determining the priority of the CSI (eg, a permutation method).

[0529] For example, by UE( Figures 16 to 20 100 / 200) in step S1410 from BS ( Figures 16 to 20 The operation of receiving the configuration information of 100 / 200) can be performed by Figures 16 to 20 For example, refer to Figure 17 The one or more processors 202 may control the one or more transceivers 206 and / or the one or more memories 204 to receive the configuration information. The one or more transceivers 206 may receive the configuration information from the BS.

[0530] The UE may receive a CSI-reference signal (CSI-RS) from the base station (BS) S1420. In other words, the CSI-RS may be received based on a CSI-related configuration. For example, the CSI-RS may be transmitted from the base station periodically, semi-continuously, or aperiodically. Furthermore, the CSI-RS may be used for CSI measurement and calculation.

[0531] For example, by UE( Figures 16 to 20 100 / 200) in step S1420 from BS ( Figures 16 to 20The operation of receiving CSI-RS can be described later. Figures 16 to 20 For example, refer to Figure 17 The one or more processors 202 may control the one or more transceivers 206 and / or the one or more memories 204 to receive the CSI-RS. The one or more transceivers 206 may receive the CSI-RS from the BS.

[0532] The UE may measure / calculate CSI ( S1430 ). For example, the CSI may be measured / calculated based on an (enhanced) type II CSI codebook and may include information about a precoding matrix (eg, PMI, etc.).

[0533] For example, the CSI may include information related to the coefficients. The information related to the coefficients may include at least one of: i) information on the amplitude coefficients, ii) information on the phase coefficients, or iii) bitmap information related to the amplitude coefficients and the phase coefficients.

[0534] For example, in the above step S1430, the UE ( Figures 16 to 20 The operation of measuring / calculating CSI can be described as follows: Figures 16 to 20 For example, refer to Figure 17 , the one or more processors 202 may control the one or more transceivers 206 and / or the one or more memories 204 to measure / calculate CSI.

[0535] The UE may transmit a CSI report configured by omitting portions of the plurality of groups based on predefined priorities of the plurality of groups to the base station via a physical uplink shared channel (PUSCH) S1340. The transmission power of the PUSCH is determined based on the configuration information. The CSI report may include a first part and a second part. For example, the first part may correspond to uplink control information (UCI) part 1 (i.e., part 1 CSI), and the second part may correspond to UCI part 2 (i.e., part 2 CSI).

[0536] A portion of the second part of the CSI report may be omitted. The omission of the second part of the CSI report may be performed based on the proposed method (e.g., Proposal 1 / Proposal 2). For example, the constituent elements of the information related to the coefficients (e.g., information about the amplitude coefficients, information about the phase coefficients, and bitmap information related to the amplitude coefficients and the phase coefficients) may be classified into a plurality of groups based on their priority values, and the CSI report, i.e., the UCI may be configured by omitting specific groups according to the priorities of the plurality of groups. Groups with low priority may be omitted first. For example, a specific group to be included in the second part of the CSI report may be omitted.

[0537] For example, as the priority value becomes smaller, the priority of each component may be higher. For example, according to the priority determined based on the priority value, elements with high priority among the elements of information related to the coefficient may be included in the first group, and elements with low priority may be included in the second group. The priority of the first group is higher than that of the second group, and therefore, the second group may be omitted before the first group.

[0538] The priority value may be determined based on at least one of: i) a layer index, ii) an index of a spatial domain associated / related to each component, or iii) an index of a frequency domain associated / related to each component. For example, the priority value may be determined based on i) a layer index, ii) an index of a spatial domain associated / related to each component, and iii) an index of a frequency domain associated / related to each component.

[0539] For example, the priority value may be increased in the order in which the higher and lower indices in the frequency domain associated with / related to the component are sequentially crossed based on a predefined specific index. The predefined specific index may be associated with / related to the index in the frequency domain of the strongest coefficient among the coefficients. For example, the predefined specific index may be "0".

[0540] As another example, the priority values ​​may increase in ascending order of the indices of the spatial regions. As another example, i) the index of the spatial region with the strongest coefficient and ii) the index of the spatial region corresponding to the beam with the opposite polarization relative to the beam corresponding to the strongest coefficient may have the highest priority (i.e., the priority value may be the smallest). Thereafter, the priority values ​​of the remaining indices may be determined sequentially in ascending order. Alternatively, the indices are remapped so that the index of the spatial region with the strongest coefficient becomes 0, and the remaining indices are also remapped in the form of a cyclic shift, and then the priority values ​​may be determined in the order of the remapped indices.

[0541] As another example, when some (e.g., M') of the basis (or component) (e.g., M) in the frequency domain are reported and the rest are omitted, as many consecutive indices as the basis to be reported may be selected based on the index in the frequency domain of the strongest coefficient (e.g., index = 0), and information about the corresponding coefficient and information in the form of a bitmap corresponding to the coefficient may be reported. As a similar example, when some basis (or components) in the spatial domain are reported, an index corresponding to the index in the spatial domain of the strongest coefficient, a coefficient corresponding to the index of the SD basis paired with respect to the antenna port, and information in the form of a bitmap corresponding to the coefficient may be reported (the coefficients corresponding to the remaining SD basis indices and the information in the form of a bitmap corresponding to the coefficient may be omitted).

[0542] The CSI report may also include information related to CSI omission. For example, since the CSI report (or UCI) can be configured by omitting specific groups based on the priority of multiple groups, it may include information related to the specific group to be omitted. For example, the information related to the omission of a specific group may include information about at least one of the following: i) the presence or absence of omission (i.e., whether the UE performed the omission), ii) the omission target, or iii) the omission. For example, the information related to CSI omission (i.e., information related to the omission of a specific group) may be transmitted while being included in the first part of the CSI report.

[0543] For example, in step S1440, the UE ( Figures 16 to 20 100 / 200) to BS ( Figures 16 to 20 The operation of sending UCI can be described later. Figures 16 to 20 For example, refer to Figure 17 The one or more processors 202 may control the one or more transceivers 206 and / or the one or more memories 204 to transmit UCI via the PUSCH. The one or more transceivers 206 may transmit UCI to the BS via the PUSCH.

[0544] Figure 15 An example of an operation flow chart of a base station to which the methods and / or embodiments proposed in the present disclosure can be applied is shown. Figure 15 It is only for the convenience of description and does not limit the scope of this disclosure. Figure 15 , it is assumed that the UE and / or base station operates based on the methods and / or embodiments of Proposal 1 and Proposal 2 above. Figure 15 Some of the steps described in the following may be combined or omitted. In addition, in performing the process described below, you may consider / apply Figure 7 CSI-related operations.

[0545] BS may collectively mean an object that performs data transmission / reception with a UE. For example, a BS may include one or more TPs (transmission points), one or more TRPs (transmission and reception points), and the like. In addition, a TP and / or TRP may include a panel, a transmission and reception unit, and the like of the BS. In addition, as described above, a TRP may be distinguished based on information (e.g., an index or ID) for a CORESET group (or CORESET pool). In one example, in the case where a single UE is configured to perform transmission / reception with multiple TRPs (or cells), this may mean that multiple CORESET groups (or CORESET pools) may be configured for the UE. Configuration for a CORESET group (or CORESET pool) may be performed through higher layer signaling (e.g., RRC signaling).

[0546] The BS may transmit configuration information to the UE (S1510). The configuration information may be transmitted through higher layer signaling (eg, RRC or MAC-CE).

[0547] For example, the configuration information may include (i) CSI-related configuration and (ii) configuration related to transmission power control of uplink channels (eg, PUSCH / PUCCH).

[0548] The CSI-related configuration may include configuration information about the reference signal used for CSI and resource allocation information for CSI reporting. For example, the configuration information related to the reference signal may include information about the period for sending the reference signal and time domain behavior information of the reference signal. In addition, the configuration information related to the reference signal may include information about the resource and / or resource set to which the reference signal is sent. In addition, the CSI-related configuration may include information about the CSI report setting. For example, whether the CSI report is a PUSCH-based CSI report or a PUCCH-based CSI report may be configured based on the information about the CSI report setting. For example, the CSI-related configuration may include information related to the CSI omission (or UCI omission) operation of the UE. For example, the CSI-related configuration may include information for determining the priority of the CSI (e.g., a permutation method).

[0549] For example, in step S1510, BS ( Figures 16 to 20 100 / 200) to UE( Figures 16 to 20 The operation of sending the configuration information can be described later. Figures 16 to 20 For example, refer to Figure 17 , the one or more processors 202 may control the one or more transceivers 206 and / or the one or more memories 204 to send the configuration information. And the one or more transceivers 206 may send the configuration information to the UE.

[0550] The base station may transmit a CSI-RS to the UE in step S1520. In other words, the CSI-RS may be transmitted based on a CSI-related configuration. For example, the CSI-RS may be transmitted periodically, semi-continuously, or aperiodically. Furthermore, the CSI-RS may be used for CSI measurement and calculation by the UE.

[0551] For example, in step S1510, BS ( Figures 16 to 20 100 / 200) to UE( Figures 16 to 20 The operation of transmitting CSI-RS can be described later. Figures 16 to 20 For example, refer to Figure 17The one or more processors 202 may control the one or more transceivers 206 and / or the one or more memories 204 to transmit the CSI-RS. The one or more transceivers 206 may transmit the CSI-RS to the UE.

[0552] For example, CSI may be measured / calculated based on an (enhanced) Type II CSI codebook and may include information about a precoding matrix (e.g., PMI, etc.). For example, CSI may include information related to coefficients. The information related to coefficients may include at least one of i) information about amplitude coefficients, ii) information about phase coefficients, or iii) bitmap information related to amplitude coefficients and phase coefficients.

[0553] For example, the CSI may be measured / calculated based on an (improved) Type II CSI codebook and may include information about a precoding matrix (e.g., PMI). For example, the CSI may include information related to coefficients. The information related to coefficients may include at least one of the following: i) information about amplitude coefficients, ii) information about phase coefficients, or iii) bitmap information related to amplitude coefficients and phase coefficients.

[0554] The priority value may be determined based on at least one of the following: i) a layer index, ii) an index of a spatial domain associated / related to each component, or iii) a frequency domain index associated / related to each component. For example, the priority value may be determined based on i) a layer index, ii) an index of a spatial domain associated / related to each component, and iii) a frequency domain index associated / related to each component.

[0555] For example, the priority value may be increased based on a predefined specific index in the order of sequentially interleaving higher and lower indices in the frequency domain associated / related to the component. The predefined specific index may be associated with the frequency domain index of the strongest coefficient among the coefficients. For example, the predefined specific index may be "0." As another example, the priority value may be increased in ascending order of the indices of the spatial regions.

[0556] For example, the priority value may be increased based on a predefined specific index in the order of sequentially interleaving higher and lower indices in the frequency domain indices associated with / related to the component. The predefined specific index may be associated with / related to the frequency domain index of the strongest coefficient among the coefficients. For example, the predefined specific index may be "0." As another example, the priority value may be increased in ascending order of the indices of the spatial regions.

[0557] For example, in step S1530, the BS ( Figures 16 to 20 100 / 200) from UE( Figures 16 to 20The operation of receiving the UCI including the CSI may be performed by the following method. Figures 16 to 20 For example, refer to Figure 17 The one or more processors 202 may control the one or more transceivers 206 and / or the one or more memories 204 to receive UCI including CSI via the PUSCH. The one or more transceivers 206 may receive UCI including CSI from the UE via the PUSCH.

[0558] In addition, according to the above methods and embodiments (eg, Proposal 1 / Proposal 2, etc.), Figure 13 、 14 The UE and / or base station may be operated by each step of 15 or 16. Figures 16 to 20 For example, a base station may correspond to a first radio device, a UE may correspond to a second radio device, and vice versa may be considered in some cases.

[0559] For example, the above-mentioned base station / UE signaling and operations (e.g., Figure 13 / 14 / 15 etc.) can be Figures 16 to 20 One or more processors (e.g., 102, 202) of the UE process, and the above-mentioned base station / UE signaling and operations (e.g., Figure 13 / 14 / 15 etc.) can be used to drive Figures 16 to 20 In the form of instructions / programs (eg, instructions, executable code) of at least one processor (eg, 102, 202) of the processor (eg, 102, 202) stored in a memory (eg, Figures 16 to 20 In one or more memories (e.g., 104 and 204).

[0560] Examples of communication systems applicable to the present disclosure

[0561] The various descriptions, functions, processes, proposals, methods and / or operational flowcharts of the present disclosure described in this document may be applied to, but not limited to, various fields requiring wireless communication / connectivity between devices (e.g., 5G).

[0562] Hereinafter, the detailed description will be given with reference to the accompanying drawings. In the following drawings / descriptions, unless otherwise specified, the same reference numerals may represent the same or corresponding hardware blocks, software blocks or functional blocks.

[0563] Figure 16 The diagram illustrates a communication system applied to the present disclosure.

[0564] refer to Figure 16, the communication system applied to the present disclosure includes a wireless device, a base station (BS) and a network. Here, the wireless device refers to a device that uses a radio access technology (RAT) (for example, 5G New RAT (NR)) or long term evolution (LTE) to perform communication, and may be referred to as a communication / radio / 5G device. The wireless device may include, but is not limited to, a robot 1010a, vehicles 1010b-1 and 1010b-2, an extended reality (XR) device 1010c, a handheld device 1010d, a home appliance 1010e, an Internet of Things (IoT) device 1010f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous driving vehicle, and a vehicle capable of communicating between vehicles. Here, a vehicle may include an unmanned aerial vehicle (UAV) (for example, a drone). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of head-mounted devices (HMDs), head-up displays (HUDs) installed in vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, and the like. Handheld devices may include smartphones, smart boards, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., laptops). Home appliances may include televisions, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, a BS and a network may be implemented as wireless devices, and a specific wireless device 200a may operate as a BS / network node relative to other wireless devices.

[0565] Wireless devices 1010a to 1010f can connect to network 300 via BS 1020. AI technology can be applied to wireless devices 1010a to 1010f, and wireless devices 1010a to 1010f can connect to AI server 400 via network 300. Network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 1010a to 1010f can communicate with each other via BS 1020 / network 300, wireless devices 1010a to 1010f can perform direct communication with each other (e.g., sidelink communication) without going through the BS / network. For example, vehicles 1010b-1 and 1010b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). In addition, IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 1010a to 1010f.

[0566] Wireless communication / connections 150a, 150b, or 150c may be established between wireless devices 1010a to 1010f / BS 1020 or BS 1020 / BS 1020. The wireless communication / connections may be established via various RATs (e.g., 5G NR), such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). The wireless devices and BSs / wireless devices may transmit / receive radio signals with each other via the wireless communication / connections 150a and 150b. For example, the wireless communication / connections 150a and 150b may transmit / receive signals via various physical channels. To this end, based on various suggestions of the present disclosure, at least a portion of various configuration information setting procedures, various signal processing procedures (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation procedures for transmitting / receiving radio signals may be performed.

[0567] Examples of wireless devices suitable for the present disclosure

[0568] Figure 17 The diagram illustrates a wireless device suitable for use with the present disclosure.

[0569] refer to Figure 17 , the first wireless device 100 and the second wireless device 200 can transmit radio signals through various RATs (e.g., LTE and NR). Here, {the first wireless device 100 and the second wireless device 200} may correspond to Figure 16 {wireless device 1010x and BS 1020} and / or {wireless device 1010x and wireless device 1010x}.

[0570] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106 and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor 102 may process information in the memory 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the transceiver 106. The processor 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory 104. The memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may store software code including commands for executing some or all of the processes controlled by the processor 102, or for executing the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. Here, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals via one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0571] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver (206) and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor 202 may process the information in the memory 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the transceiver 206. The processor 202 may receive a radio signal including fourth information / signals through the transceiver 206, and then store information obtained by processing the fourth information / signals in the memory 204. The memory 204 may be connected to the memory 204 and may store various information related to the operation of the processor 202. For example, the memory 204 may store software code including commands for executing part or all of the processes controlled by the processor or for executing the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. Here, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive radio signals via one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0572] In the following, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by, but are not limited to, one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. The one or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document, and provide the generated signal to the one or more transceivers 106 and 206. The one or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from the one or more transceivers 106 and 206 and obtain the PDU, SDU, message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document.

[0573] The one or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. The one or more processors 102 and 202 may be implemented using hardware, firmware, software, or a combination thereof. For example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field-programmable gate arrays (FPGAs) may be included in the one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document may be included in the one or more processors 102 and 202, or stored in one or more memories 104 and 204 so as to be driven by the one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document may be implemented using firmware or software in the form of code, commands, and command sets.

[0574] One or more memories 104 and 204 can be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, codes, instructions and / or commands. One or more memories 104 and 204 can be configured by read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drive, registers, buffer memory, computer-readable storage media and / or combinations thereof. One or more memories 104 and 204 can be located inside and / or outside one or more processors 102 and 202. One or more memories 104 and 204 can be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0575] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels as described in the methods and / or operational flowcharts of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels as described in the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive radio signals. For example, one or more processors 102 and 202 may control the one or more transceivers 106 and 206 to transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may control the one or more transceivers 106 and 206 to receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and the one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels as described in the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document via the one or more antennas 108 and 208. In this document, the one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). The one or more transceivers 106 and 206 may convert received radio signals / channels, etc., from RF band signals to baseband signals to facilitate processing of the received user data, control information, radio signals / channels, etc. using the one or more processors 102 and 202. The one or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc., processed using the one or more processors 102 and 202, from baseband signals to RF band signals. To this end, the one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0576] Examples of signal processing circuits to which the present disclosure is applied

[0577] Figure 18 The diagram shows the signal processing circuit used to transmit signals.

[0578] refer to Figure 18 , the signal processing circuit 1000 may include a scrambler 1010 , a modulator 1020 , a layer mapper 1030 , a precoder 1040 , a resource mapper 1050 , and a signal generator 1060 . Figure 18 The operations / functions can be performed by but not limited to Figure 17 The processors 102 and 202 and / or the transceivers 106 and 206 execute the above operations. Figure 18The hardware components can be Figure 17 For example, blocks 1010 to 1060 may be implemented by the processors 102 and 202 and / or the transceivers 106 and 206. Figure 17 Furthermore, blocks 1010 to 1050 may be implemented by processors 102 and 202. Figure 17 and block 1060 may be implemented by processors 102 and 202 of Figure 17 The transceivers 106 and 206 are implemented.

[0579] Codewords can be passed Figure 18 The signal processing circuit 1000 is converted into a radio signal. In this article, a codeword is a coded bit sequence of an information block. An information block may include a transport block (e.g., UL-SCH transport block, DL-SCH transport block). Radio signals can be transmitted via various physical channels (e.g., PUSCH and PDSCH).

[0580] Specifically, the codeword can be converted into a scrambled bit sequence by the scrambler 1010. A scrambling sequence for scrambling can be generated based on an initialization value, and the initialization value can include the ID information of the wireless device. The scrambled bit sequence can be modulated into a modulation symbol sequence by the modulator 1020. The modulation scheme may include pi / 2-binary phase shift keying (pi / 2-BPSK), m-phase shift keying (m-PSK), and m-quadrature amplitude modulation (m-QAM). The complex modulation symbol sequence can be mapped to one or more transmission layers by the layer mapper 1030. The modulation symbol of each transmission layer can be mapped (precoded) to the corresponding antenna port by the precoder 1040. The output z of the precoder 1040 can be obtained by multiplying the output y of the layer mapper 1030 by the N*M precoding matrix W. In this article, N is the number of antenna ports and M is the number of transmission layers. The precoder 1040 can perform precoding after performing transform precoding (e.g., DFT) on the complex modulation symbols. In addition, the precoder 1040 may perform precoding without performing transform precoding.

[0581] The resource mapper 1050 can map the modulation symbols for each antenna port to time-frequency resources. The time-frequency resources may include multiple symbols in the time domain (e.g., CP-OFDMA symbols and DFT-s-OFDMA symbols) and multiple subcarriers in the frequency domain. The signal generator 1060 can generate a radio signal from the mapped modulation symbols and transmit the generated radio signal to other devices through each antenna. For this purpose, the signal generator 1060 may include an inverse fast Fourier transform (IFFT) module, a cyclic prefix (CP) inserter, a digital-to-analog converter (DAC), and a frequency upconverter.

[0582] The signal processing for signals received in a wireless device may be performed in Figure 18 For example, a wireless device (e.g., Figure 17 100 or 200) can receive a radio signal from the outside through an antenna port / transceiver. The received radio signal can be converted into a baseband signal by a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a fast Fourier transform (FFT) module. Next, the baseband signal can be restored to a codeword through a resource demapping process, a post-coding process, a demodulation processor, and a descrambling process. The codeword can be restored to the original information block by decoding. Therefore, a signal processing circuit (not shown) for receiving a signal may include a signal restorer, a resource demapper, a post-coding coder, a demodulator, a descrambler, and a decoder.

[0583] Examples of wireless devices applicable to the present disclosure

[0584] Figure 19 Another example of a wireless device applied to the present disclosure is shown. The wireless device can be implemented in various forms according to use cases / services (refer to Figure 16 ).

[0585] refer to Figure 19 , wireless devices 100 and 200 may correspond to Figure 17 The wireless devices 100 and 200 may be configured by various elements, components, units / parts and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130 and an additional component 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include Figure 16 One or more processors 102 and 202 and / or one or more memories 104 and 204 in the embodiment of the present invention. For example, the transceiver 114 may include Figure 16 The control unit 120 is electrically connected to the communication unit 110, the memory 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 can control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit 130. The control unit 120 can transmit information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface in the memory unit 130.

[0586] The additional components 140 may be configured differently depending on the type of wireless device. For example, the additional components 140 may include at least one of a power unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be configured in a manner that is not limited to Figure 16 Robot 100a, Figure 16 Vehicles 100b-1 and 100b-2, Figure 16 XR device 100c, Figure 16 portable device 100d, Figure 16 Home appliances 100e, Figure 16 IoT devices 100f, digital broadcast terminals, holographic devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environmental devices, Figure 16 AI servers / devices 400, Figure 16 The wireless device may be implemented in the form of a BS 200, a network node, etc. Depending on the use case / service, the wireless device may be used in a mobile or fixed location.

[0587] exist Figure 19 In the wireless devices 100 and 200, the various elements, components, units / parts, and / or modules in their entirety may be connected to each other via a wired interface, or at least a portion thereof may be wirelessly connected via a communication unit. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 may be connected via a wired interface, and the control unit 120 and the first unit (e.g., 130 and 140) may be wirelessly connected via the communication unit 110. Each element, component, unit / part, and / or module within the wireless devices 100 and 200 may further include one or more elements. For example, the control unit 120 may be configured by a collection of one or more processors. As an example, the control unit 120 may be configured by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit, and a memory control processor. As another example, the memory 130 may be configured by a random access memory (RAM), a dynamic RAM (DRAM), a read-only memory (ROM), a flash memory, a volatile memory, a non-volatile memory, and / or a combination thereof.

[0588] Examples of Handheld Devices Applicable to the Present Disclosure

[0589] Figure 20 The diagram illustrates a handheld device applicable to the present disclosure. The handheld device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch or smart glasses), or a portable computer (e.g., a notebook). The handheld device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT).

[0590] refer to Figure 20 , the handheld device 1010 may include an antenna unit 108, a communication unit 110, a control unit 120, a memory unit 130, a power supply unit 140a, an interface unit 140b, and an I / O unit 140c. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110 to 130 / 140a to 140c correspond to Figure 19 Frame 110 to 130 / 140.

[0591] The communication unit 110 can transmit and receive signals (e.g., data and control signals) to and from other wireless devices or base stations. The control unit 120 can perform various operations by controlling the components of the handheld device 1010. The control unit 120 may include an application processor (AP). The memory unit 130 can store data / parameters / programs / codes / commands required to operate the handheld device 1010. The memory unit 130 can store input / output data / information. The power supply unit 140a can supply power to the handheld device 1010 and includes wired / wireless charging circuitry, a battery, and the like. The interface unit 140b can support connection of the handheld device 1010 to other external devices. The interface unit 140b may include various ports (e.g., audio I / O ports and video I / O ports) for connecting to external devices. The I / O unit 140c can input or output video information / signals, audio information / signals, data, and / or information input by the user. The I / O unit 140 c may include a camera, a microphone, a user input unit, a display unit 140 d , a speaker, and / or a haptic module.

[0592] As an example, in the case of data communication, the I / O unit 140c can obtain information / signals (e.g., touch, text, voice, image, or video) input by the user and can store the obtained information / signals in the memory unit 130. The communication unit 110 can convert the information / signals stored in the memory into radio signals and transmit the converted radio signals directly to other wireless devices or to the BS. The communication unit 110 can receive radio signals from other wireless devices or BSs and then restore the received radio signals to the original information / signals. The restored information / signals can be stored in the memory unit 130 and can be output as various types (e.g., text, voice, image, video, or tactile) through the I / O unit 140c.

[0593] The above-mentioned embodiments are realized by combining the components and features of the present disclosure in a predetermined manner. Unless otherwise specified, each component or feature should be considered selectively. Each component or feature can be implemented without being combined with another component or feature. In addition, some components and / or features are combined with each other and can realize the embodiments of the present disclosure. The order of operations described in the embodiments of the present disclosure can be changed. Some components or features of one embodiment can be included in another embodiment, or can be replaced by corresponding components or features of another embodiment. It is obvious that some claims that refer to specific claims can be combined with other claims that refer to claims other than the specific claims to constitute embodiments, or new claims can be added by amendment after the application is submitted.

[0594] The embodiments of the present disclosure may be implemented by various means, such as hardware, firmware, software, or a combination thereof. When an embodiment is implemented by hardware, an embodiment of the present disclosure may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and the like.

[0595] When an embodiment is implemented through firmware or software, an embodiment of the present disclosure may be implemented through modules, processes, functions, etc. that perform the above-described functions or operations. The software code may be stored in a memory and may be driven by a processor. The memory may be provided inside or outside the processor and may exchange data with the processor through various well-known means.

[0596] It will be apparent to those skilled in the art that the present disclosure may be embodied in other specific forms without departing from the essential features of the present disclosure. Therefore, the foregoing detailed description should not be interpreted as limiting in all respects, but rather as illustrative. The scope of the present disclosure should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent range of the present disclosure are included within the scope of the present disclosure.

[0597] [Industrial Applicability]

[0598] The method for mapping channel state information in a wireless communication system of the present disclosure has been described focusing on examples applied to 3GPP LTE / LTE-A systems and 5G systems (new RAT systems), but the method can be applied to various wireless communication systems.

Claims

1. A method for reporting channel state information (CSI) by a user equipment (UE) via a physical uplink shared channel (PUSCH) in a wireless communication system, the method comprising: Receive configuration information from the base station, The configuration information includes (i) channel state information (CSI) related configuration and (ii) configuration related to transmission power control of the PUSCH; receiving a CSI reference signal (CSI-RS) from the base station based on the CSI-related configuration; Calculating CSI based on the CSI-RS, The CSI includes information related to the coefficients. wherein each element of said information related to said coefficient is classified as being included in one of a plurality of groups based on a priority value, wherein the priority value is determined based on i) a layer index, ii) an index of a spatial domain associated with each element, and iii) an index of a frequency domain associated with each element, and wherein the priority value increases based on a predefined specific index in an order in which a higher index and a lower index of an index of a frequency domain related to the element are sequentially crossed; wherein priorities of the plurality of groups are defined differently; and transmitting, to the base station based on a physical uplink shared channel (PUSCH), a CSI report configured by omitting a portion of the plurality of groups among the plurality of groups based on the priorities of the plurality of groups, The transmission power of the PUSCH is determined based on the configuration information.

2. The method according to claim 1, in, The smaller the priority value, the higher the priority of each element.

3. The method according to claim 1, in, The priority values ​​increase in ascending order of the index of the spatial domain.

4. The method according to claim 1, in, The priorities of i) the index of the spatial domain of the strongest coefficient and ii) the index of the spatial domain corresponding to the beam having the opposite polarization with respect to the beam corresponding to the strongest coefficient are the highest.

5. The method according to claim 1, in, The predefined specific index is related to the index in the frequency domain of the strongest coefficient among the coefficients.

6. The method according to claim 1, in, The predefined specific index is 0.

7. The method according to claim 1, in, The CSI report consists of the first and second parts, and The CSI report is omitted in the second part.

8. The method according to claim 1, in, The CSI report further includes information related to omitting the portion among the plurality of groups.

9. The method according to claim 8, in, The information related to the omission includes at least one of (i) information on whether to omit, (ii) information on an object to be omitted, or (iii) information on an amount to be omitted.

10. The method according to claim 1, in, The information related to the coefficients includes at least one of i) information for the magnitude coefficients, ii) information for the phase coefficients, or iii) information related to the magnitude coefficients and the phase coefficients.

11. The method according to claim 1, in, allocating a resource region for transmitting the PUSCH based on the CSI-related configuration, and The calculated CSI payload size exceeds the resource region.

12. A user equipment (UE) for reporting channel state information (CSI) via a physical uplink shared channel (PUSCH) in a wireless communication system, the UE comprising: one or more transceivers; one or more processors; as well as one or more memories storing instructions for operations executed by the one or more processors and coupled to the one or more processors, The operations include: Receive configuration information from the base station, The configuration information includes (i) channel state information (CSI) related configuration and (ii) configuration related to transmission power control of the PUSCH; receiving a CSI reference signal (CSI-RS) from the base station based on the CSI-related configuration; Calculating CSI based on the CSI-RS, The CSI includes information related to the coefficients. wherein each element of said information related to said coefficient is classified as being included in one of a plurality of groups based on a priority value, wherein the priority value is determined based on i) a layer index, ii) an index of a spatial domain associated with each element, and iii) an index of a frequency domain associated with each element, wherein the priority value increases based on a predefined specific index in an order in which a higher index and a lower index of an index of a frequency domain related to the element are sequentially crossed; wherein priorities of the plurality of groups are defined differently; and transmitting, to the base station based on a physical uplink shared channel (PUSCH), a CSI report configured by omitting a portion of the plurality of groups among the plurality of groups based on the priorities of the plurality of groups, The transmission power of the PUSCH is determined based on the configuration information.

13. A method for receiving channel state information (CSI) by a base station through a physical uplink shared channel (PUSCH) in a wireless communication system, the method comprising: Send configuration information to user equipment (UE), The configuration information includes (i) channel state information (CSI) related configuration and (ii) configuration related to transmission power control of the PUSCH; Sending a CSI reference signal (CSI-RS) to the UE based on the CSI-related configuration; and receiving, from the UE based on a physical uplink shared channel (PUSCH), a CSI report including CSI calculated based on the CSI-RS, The CSI includes information related to the coefficients. wherein each element of said information related to said coefficient is classified as being included in one of a plurality of groups based on a priority value, wherein the priority value is determined based on i) a layer index, ii) an index of a spatial domain associated with each element, and iii) an index of a frequency domain associated with each element, wherein the priority value increases based on a predefined specific index in an order in which a higher index and a lower index of an index of a frequency domain related to the element sequentially cross, wherein priorities of the plurality of groups are defined differently; and wherein the CSI report is configured by omitting a portion of the plurality of groups among the plurality of groups based on the priorities of the plurality of groups, and The transmission power of the PUSCH is determined based on the configuration information.

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