Method and apparatus for supporting precoding indication of multiple panels in wireless communication system

Abstract

The present disclosure relates to a 5th-Generation (5G) or 6th-Generation (6G) communication system for supporting higher data transmission rates. A method performed by a user equipment (UE) in a wireless communication system is provided. The method includes: receiving downlink control information (DCI) from a base station, the downlink control information including a sounding reference signal resource set indicator (SRSI), two sounding reference signal resource indicator (SRI) fields, and two transmission precoding matrix indicator (TPMI) fields; and transmitting a physical uplink shared channel (PUSCH) to the base station based on the DCI.

Description

Technical Field

[0001] The present disclosure generally relates to operations of a terminal and a base station in a wireless communication system, and more particularly, to a method and apparatus for supporting precoding indication of multiple panels in a wireless communication system. Background Art

[0002] 5G mobile communication technology defines a wide frequency band, making high transmission rates and new services possible, and can be implemented not only in "below 6 GHz" frequency bands such as 3.5 GHz, but also in "above 6 GHz" frequency bands (including 28 GHz and 39 GHz) called millimeter waves. In addition, it has been considered to implement 6G mobile communication technology (called a super 5G system) in a terahertz (THz) frequency band (e.g., a 95 GHz to 3 THz frequency band) in order to achieve a transmission rate fifty times faster than that of 5G mobile communication technology and an ultra-low latency that is one-tenth of that of 5G mobile communication technology.

[0003] At the beginning of the development of 5G mobile communication technology, in order to support services and meet the performance requirements related to enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC) and massive machine type communication (mMTC), the standardization of the following technologies is already underway: beamforming and massive MIMO for alleviating radio wave path loss in millimeter waves and increasing the radio wave transmission distance; parameter sets for dynamic operation of millimeter wave resources and time slot formats for efficient use (for example, operating multiple subcarrier spacings), initial access technology for supporting multi-beam transmission and broadband, definition and operation of BWP (bandwidth part), new channel coding methods (such as LDPC (low-density parity check) codes for large amounts of data transmission and polarization codes for high-reliability transmission of control information), L2 preprocessing, and network slicing for providing dedicated networks dedicated to specific services.

[0004] Currently, in view of the services supported by 5G mobile communication technology, discussions on the improvement and performance enhancement of initial 5G mobile communication technology are ongoing, and there is already physical layer standardization on technologies such as: V2X (Vehicle to Everything) that assists driving decisions of autonomous vehicles and improves user convenience based on information sent by the vehicle about the location and status of the vehicle; NR-U (New Radio Unlicensed) that is designed to operate a system in compliance with various regulatory requirements in unlicensed bands; NR UE energy saving; Non-Terrestrial Network (NTN); which is UE-satellite direct communication for providing coverage in areas where terrestrial network communications are not available; and positioning.

[0005] In addition, the following technologies are being standardized in terms of air interface architecture / protocols: Industrial Internet of Things (IIoT) to support new services through interworking and integration with other industries; IAB (Integrated Access and Backhaul) to provide nodes for network service area expansion by supporting wireless backhaul links and access links in an integrated manner; mobility enhancements including conditional handover and DAPS (Dual Active Protocol Stack) handover; and two-step random access (2-step RACH for NR) to simplify the random access process. The following technologies are also being standardized in terms of system architecture / services: 5G baseline architecture (e.g., service-based architecture or service-based interface) for combining network function virtualization (NFV) and software-defined network (SDN) technologies; and mobile edge computing (MEC) for receiving services based on UE location.

[0006] With the commercialization of 5G mobile communication systems, the number of connected devices, which has been growing exponentially, will be connected to the communication network, and it is therefore expected that there will be a need to enhance the functions and performance of 5G mobile communication systems and the integrated operation of connected devices. To this end, new research related to the following technologies is planned: Extended Reality (XR), effectively supporting AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality), etc.; improving 5G performance and reducing complexity by utilizing artificial intelligence (AI) and machine learning (ML); AI service support; Metaverse service support and drone communication.

[0007] Furthermore, such developments in 5G mobile communication systems will serve not only as a basis for developing: new waveforms for providing coverage in the terahertz band for 6G mobile communication technology; multi-antenna transmission technologies such as full-dimensional MIMO (FD-MIMO), array antennas, and large antennas; metamaterial-based lenses and antennas for improving the coverage of terahertz band signals; high-dimensional spatial multiplexing technology using OAM (orbital angular momentum); and RIS (reconfigurable smart surface), but will also serve as a basis for developing: full-duplex technology for increasing the frequency efficiency of 6G mobile communication technology and improving system networks; AI-based communication technology for implementing system optimization by utilizing satellites and AI (artificial intelligence) from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technology for implementing services at a complexity level that exceeds the limits of UE operating capabilities by utilizing ultra-high-performance communication and computing resources. Summary of the invention

[0008] Technical Solution

[0009] The present disclosure is to address at least the above problems and disadvantages and to provide at least the advantages described below.

[0010] Accordingly, an aspect of the present disclosure is to provide a method and apparatus for simultaneously transmitting a plurality of UL channels by using a plurality of panels in a wireless communication system.

[0011] According to one aspect of the present disclosure, a method performed by a user equipment (UE) in a wireless communication system is provided. The method includes: receiving downlink control information (DCI) from a base station, the downlink control information including a sounding reference signal resource set indicator (SRSI), two sounding reference signal resource indicator (SRI) fields, and two transmission precoding matrix indicator (TPMI) fields; and transmitting a physical uplink shared channel (PUSCH) to the base station based on the DCI. In the case where the SRSI includes a first value associated with a first SRS resource set, the PUSCH is transmitted based on the first SRI field of the two SRI fields associated with the first SRS resource set and the first TPMI field of the two TPMI fields, and in the case where the SRSI includes a second value associated with a second SRS resource set, the PUSCH is transmitted based on the first SRI field of the two SRI fields associated with the second SRS resource set and the first TPMI field of the two TPMI fields.

[0012] According to one aspect of the present disclosure, a user equipment (UE) in a wireless communication system is provided. The UE includes: a transceiver; and a controller, which is connected to the transceiver and configured to receive downlink control information (DCI) from a base station, the downlink control information including a sounding reference signal resource set indicator (SRSI), two sounding reference signal resource indicator (SRI) fields, and two transmission precoding matrix indicator (TPMI) fields; and transmit a physical uplink shared channel (PUSCH) to the base station based on the DCI. In the case where the SRSI includes a first value associated with a first SRS resource set, the PUSCH is transmitted based on the first SRI field of the two SRI fields associated with the first SRS resource set and the first TPMI field of the two TPMI fields, and in the case where the SRSI includes a second value associated with a second SRS resource set, the PUSCH is transmitted based on the first SRI field of the two SRI fields associated with the second SRS resource set and the first TPMI field of the two TPMI fields.

[0013] According to one aspect of the present disclosure, a method performed by a base station in a wireless communication system is provided. The method includes: transmitting downlink control information (DCI) to a user equipment (UE), the downlink control information including a sounding reference signal resource set indicator (SRSI), two sounding reference signal resource indicator (SRI) fields, and two transmission precoding matrix indicator (TPMI) fields; and receiving a physical uplink shared channel (PUSCH) based on the DCI from the UE. In the case where the SRSI includes a first value associated with a first SRS resource set, the PUSCH is received based on the first SRI field of the two SRI fields associated with the first SRS resource set and the first TPMI field of the two TPMI fields, and in the case where the SRSI includes a second value associated with a second SRS resource set, the PUSCH is received based on the first SRI field of the two SRI fields associated with the second SRS resource set and the first TPMI field of the two TPMI fields.

[0014] According to one aspect of the present disclosure, a base station in a wireless communication system is provided. The base station includes: a transceiver; and a controller, which is connected to the transceiver and configured to: transmit downlink control information (DCI) to a user equipment (UE), the downlink control information including a sounding reference signal resource set indicator (SRSI), two sounding reference signal resource indicator (SRI) fields and two transmission precoding matrix indicator (TPMI) fields; and receive a physical uplink shared channel (PUSCH) based on the DCI from the UE. In the case where the SRSI includes a first value associated with a first SRS resource set, the PUSCH is received based on the first SRI field of the two SRI fields associated with the first SRS resource set and the first TPMI field of the two TPMI fields, and in the case where the SRSI includes a second value associated with a second SRS resource set, the PUSCH is received based on the first SRI field of the two SRI fields associated with the second SRS resource set and the first TPMI field of the two TPMI fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent from the following description in conjunction with the accompanying drawings, in which:

[0016] Figure 1 The basic structure of the time-frequency domain in the wireless communication system according to the embodiment is shown;

[0017] Figure 2 The frame, subframe and time slot structures in a wireless communication system according to an embodiment are presented;

[0018] Figure 3A BWP configuration in a wireless communication system according to an embodiment is shown;

[0019] Figure 4 Base station beam assignment according to transmission configuration indication (TCI) state configuration in a wireless communication system according to an embodiment is shown;

[0020] Figure 5 Frequency axis resource allocation of a physical DL shared channel (PDSCH) in a wireless communication system according to an embodiment is shown;

[0021] Figure 6 The time axis resource allocation of PDSCH in a wireless communication system according to an embodiment is shown;

[0022] Figure 7 A process for beam configuration and activation for PDSCH according to an embodiment is shown;

[0023] Figure 8 A medium access control (MAC) control element (CE) for activation based on spatial relationship of physical UL control channel (PUCCH) resource groups in a wireless communication system according to an embodiment is presented;

[0024] Fig. 9 A repeated physical UL shared channel (PUSCH) transmission type B in a wireless communication system according to an embodiment is presented;

[0025] Fig.10 The radio protocol structures of a terminal and a base station in a single cell, carrier aggregation and dual connectivity scenarios in a wireless communication system according to an embodiment are shown;

[0026] Fig.11 Antenna port configuration and resource allocation for cooperative communication in a wireless communication system according to an embodiment are presented;

[0027] Fig.12 A DCI configuration for cooperative communication in a wireless communication system according to an embodiment is presented;

[0028] Fig.13 An enhanced PDSCH TCI state activation / deactivation MAC-CE structure according to an embodiment is shown;

[0029] Fig.14 A radio link monitoring (RLM) reference signal (RS) selection process according to an embodiment is presented;

[0030] Fig.15 A MAC-CE structure for activation and indication of a joint TCI state in a wireless communication system according to an embodiment is shown;

[0031] Fig.16 A MAC-CE structure for activation and indication of a joint TCI state in a wireless communication system according to an embodiment is shown;

[0032] Fig.17 A MAC-CE structure for activation and indication of a joint TCI state in a wireless communication system according to an embodiment is shown;

[0033] Fig.18 A MAC-CE structure for activation and indication of a separate TCI state in a wireless communication system according to an embodiment is shown;

[0034] Fig.19 A MAC-CE structure for activation and indication of a separate TCI state in a wireless communication system according to an embodiment is shown;

[0035] Fig. 20 A MAC-CE structure for activation and indication of a separate TCI state in a wireless communication system according to an embodiment is shown;

[0036] Fig.21 A MAC-CE structure for activation and indication of a separate TCI state in a wireless communication system according to an embodiment is shown;

[0037] Fig. 22 A MAC-CE structure for activation and indication of a joint TCI state and a separate TCI state in a wireless communication system according to an embodiment is shown;

[0038] Fig.23 A MAC-CE structure for activation and indication of a joint TCI state and a separate TCI state in a wireless communication system according to an embodiment is shown;

[0039] Fig.24 The beam application time (BAT) that may be considered when using a unified TCI scheme in a wireless communication system according to an embodiment is presented;

[0040] Fig.25 A MAC-CE structure for activation and indication of multiple joint TCI states in a wireless communication system according to an embodiment is presented;

[0041] Fig.26 A MAC-CE structure for activation and indication of multiple individual TCI states in a wireless communication system according to an embodiment is shown;

[0042] Fig. 27 A MAC-CE structure for activation and indication of multiple individual TCI states in a wireless communication system according to an embodiment is shown;

[0043] Fig.28 A MAC-CE structure for activation and indication of a joint TCI state or a separate DL or UL TCI state in a wireless communication system according to an embodiment is shown;

[0044] Fig.29 A MAC-CE structure for activation and indication of multiple joint TCI states or individual DL or UL TCI states in a wireless communication system according to an embodiment is presented;

[0045] Fig.30 A MAC-CE structure for activation and indication of multiple joint TCI states or individual DL or UL TCI states in a wireless communication system according to an embodiment is presented;

[0046] Fig.31 A case where two SRS resources are included in each of two SRS resource sets in a wireless communication system according to an embodiment and a terminal can support simultaneous UL transmission using two panels is shown;

[0047] Fig.32 A case where two SRS resources are included in each of two SRS resource sets in a wireless communication system according to an embodiment and a terminal can support simultaneous UL transmission using two panels is shown;

[0048] Fig.33 A panel for resource allocation and transmission for UL transmission in a frequency division multiplexing (FDM), space division multiplexing (SDM) and single frequency network (SFN) scheme supporting multi-panel simultaneous transmission (STxMP) in a wireless communication system according to an embodiment is shown;

[0049] Fig.34 An example of simultaneous PUSCH transmission using multiple panels in a wireless communication system according to an embodiment is shown;

[0050] Fig.35 illustrates simultaneous PUSCH transmission using multiple panels in a wireless communication system according to an embodiment;

[0051] Fig.36 A case where four SRS resources are included in each of two SRS resource sets in a wireless communication system according to an embodiment and a terminal can support simultaneous UL transmission using two panels is shown;

[0052] Fig.37 The operation of non-codebook based simultaneous PUSCH transmission using multiple panels according to an embodiment is demonstrated;

[0053] Fig.38 A terminal in a wireless communication system according to an embodiment is shown; and

[0054] Fig.39 A base station in a wireless communication system according to an embodiment is shown. DETAILED DESCRIPTION

[0055] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0056] In the process of describing the embodiments, for the sake of clarity and conciseness, descriptions related to technical contents that are well known in the art and have no direct relevance to the present disclosure will be omitted.

[0057] In the drawings, some elements may be exaggerated, omitted or schematically shown, and the size of each element does not completely reflect the actual size. The same or corresponding elements are shown with the same reference numerals.

[0058] By referring to the embodiments in conjunction with the drawings, the advantages and features of the present disclosure and their implementation will be apparent. However, the present disclosure is not limited to the embodiments set forth below, but can be implemented in various different forms. The following embodiments are provided only to fully disclose the present disclosure and inform those of ordinary skill in the art of the scope of the present disclosure. Throughout the entire specification, the same or similar reference numerals represent the same or similar elements. The terms to be described below are defined in view of the functions in the present disclosure and may be different according to the user, the user's intention or custom. Therefore, the definition of the term should be determined based on the content throughout the entire specification.

[0059] In this article, according to the embodiment, an element can be expressed in singular form or plural form. However, the singular form or plural form is selected for ease of description, and the present disclosure is not limited thereto. Therefore, an element expressed in plural form may also include a single element, or an element expressed in singular form may include multiple elements.

[0060] As used herein, the term "unit" indicates software or hardware components, such as field programmable gate arrays (FPGAs) or application specific integrated circuits (ASICs), and the unit performs a specific role. However, units are not limited to software or hardware. Units can be configured to reside on addressable storage media and be configured to reproduce on one or more processors. Therefore, units can include components (such as software, object-oriented software, classes and task components), processes, functions, attributes, procedures, subroutines, program code fragments, drivers, firmware, microcodes, circuits, data, databases, data structures, tables, arrays and variables. The functionality provided in components and units can be combined into fewer components and units, or can be further divided into other components and units. Components and units can be implemented as reproducing one or more central processing units (CPUs) in a device or a secure multimedia card. Units can include one or more processors.

[0061] Since the 5G communication system as a post-LTE communication system must freely reflect various requirements of users, service providers, etc., it is necessary to support services that meet various requirements. Services considered in the 5G communication system include enhanced mobile broadband (eMBB) communication, massive machine type communication (mMTC), ultra-reliable low latency communication (URLLC), etc.

[0062] eMBB aims to provide higher data rates than those supported by existing LTE, LTE-A or LTE-Pro. For example, in a 5G communication system, for a single base station, eMBB must provide a peak data rate of 20Gbps in the downlink and a peak data rate of 10Gbps in the uplink. In addition, the 5G communication system must provide an increased user-perceived data rate as well as a maximum data rate for the UE. In order to meet this requirement, it is necessary to improve the transmission / reception technology including further enhanced multiple-input multiple-output (MIMO) transmission technology. In addition, the data rate required by the 5G communication system can be obtained using a frequency bandwidth of more than 20MHz in a frequency band of 3 to 6GHz or 6GHz or higher, instead of using a transmission bandwidth of up to 20MHz to transmit signals in the 2GHz band used in LTE.

[0063] In addition, in the 5G communication system, mMTC is considered to support application services such as the Internet of Things (IoT). mMTC has the following requirements, such as supporting the connection of a large number of UEs within a cell, enhancing the coverage of UEs, improving battery time, reducing the cost of UEs, etc., in order to effectively provide the Internet of Things. Since the Internet of Things provides communication functions while providing to various sensors and various devices, it must support a large number of UEs in the cell (e.g., 1,000,000 UEs / km2). In addition, UEs supporting mMTC may require wider coverage than other services provided by the 5G communication system because the UE is likely to be located in a shadow area, such as the basement of a building, which is not covered by the cell due to the nature of the service. UEs supporting mMTC must be configured to be inexpensive and may require a very long battery life, such as 10 to 15 years, because it is difficult to frequently replace the battery of the UE.

[0064] Finally, URLLC, as a cellular-based mission-critical wireless communication service, can be used for remote control of robots or machines, industrial automation, unmanned aerial vehicles, telemedicine, emergency alerts, etc. Therefore, URLLC must provide communications with ultra-low latency and ultra-high reliability. For example, services supporting URLLC should meet an air interface latency of less than 0.5 ms and also require 10 -5Or a smaller packet error rate. Therefore, for services supporting URLLC, the 5G system must provide a shorter transmission time interval (TTI) than other services, and may require a design for allocating a large amount of resources within the frequency band to ensure the reliability of the communication link.

[0065] The three 5G services (i.e., eMBB, URLLC, and mMTC) can be multiplexed and transmitted in a single system. In this case, different transmit / receive technologies and transmit / receive parameters can be used between services to meet the different requirements of the corresponding services. Of course, 5G is not limited to the above three services.

[0066] With reference to the following description, a base station is an entity that allocates resources to a terminal, and may be at least one of a gNode B, an eNode B, a node B, a base station (BS), a wireless access unit, a base station controller, and a node on a network. The terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing a communication function. In the present disclosure, "downlink (DL)" refers to a radio link via which a base station transmits a signal to a terminal, and "uplink (UL)" refers to a radio link via which a terminal transmits a signal to a base station. In addition, in the following description, an LTE or LTE-A system may be described by way of example, but the embodiments of the present disclosure may also be applied to other communication systems with similar technical backgrounds or channel types. Examples of such communication systems may include 5th generation mobile communication technologies (5G, new radio, and NR) that are beyond the development of LTE-A, and in the following description, "5G" may be a concept covering existing LTE, LTE-A, or other similar services. In addition, based on the judgment of those skilled in the art, the embodiments of the present disclosure may also be applied to other communication systems with some modifications without significantly departing from the scope of the present disclosure.

[0067] Specifically, the present disclosure relates to a method for performing simultaneous uplink transmission using multiple panels in a wireless communication system, UE capability reporting of terminals for corresponding operations, and simultaneous uplink transmission scheduling including precoding indication of base stations and high-layer parameter configuration, and a device capable of executing the method.

[0068] In the following, BS is a subject that performs resource allocation to a terminal, and may include at least one of a gNode B, a gNB, an eNodeB, a Node B, a radio access unit, a base station controller, or a node on a network. The terminal may include a UE, a mobile station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing a communication function. The embodiments of the present disclosure will be described using a 5G system as an example, but may also be applied to other communication systems with similar technical backgrounds or channel types. For example, LTE or LTE-A mobile communications and mobile communication technologies developed after 5G may be included therein. Therefore, according to the determination of those skilled in the art, without departing from the scope of the present disclosure, the embodiments of the present disclosure may also be applied to other communication systems through partial modifications. The content of the present disclosure is applicable to frequency division duplex (FDD) systems and time division duplex (TDD) systems. In the following, high-layer signaling is a method of transmitting a signal from a base station to a terminal by using a physical layer DL data channel or transmitting a signal from a terminal to a base station using a physical layer UL data channel, and may be referred to as radio resource control (RRC) signaling, PDCP signaling, or MAC control element (CE).

[0069] The terms described below are defined in consideration of the functions in the present disclosure and may vary according to the intention or use of a user or operator. Therefore, they should be defined based on the contents of the entire specification.

[0070] Hereinafter, in the description of the present disclosure, high-layer signaling may be signaling corresponding to at least one or a combination of one or more of the following signaling types.

[0071] MIB (Master Information Block)

[0072] SIB (System Information Block) or SIB X (X = 1, 2, ...)

[0073] RRC

[0074] MAC CE

[0075] In addition, the L1 signaling may be signaling corresponding to at least one of signaling methods using the following physical layer channels or signaling types or a combination of one or more thereof.

[0076] PDCCH-DCI

[0077] Terminal-specific (UE-specific) DCI

[0078] Group Common DCI

[0079] Public DCI

[0080] Scheduling DCI (e.g., DCI for scheduling DL or UL data)

[0081] Non-scheduled DCI (e.g., DCI not used for scheduling DL or UL data)

[0082] PUCCH

[0083] UCI (UL Control Information)

[0084] Hereinafter, the determination of the priority between A and B may be referred to in various ways, such as selecting the one with a higher priority according to a predetermined priority rule to execute the operation corresponding thereto, or omitting or discarding the operation with a lower priority.

[0085] Hereinafter, the term "time slot" used in the present disclosure is a general term that may refer to a specific time unit corresponding to a transmission time interval (TTI), and specifically, the time slot may refer to a time slot used in a 5G NR system and may also refer to a time slot or subframe used in a 4G LTE system.

[0086] Hereinafter, a description of examples will be provided via a plurality of embodiments, but the embodiments are not mutually exclusive, and one or more embodiments may be applied simultaneously or in combination.

[0087] For ease of description, cells, transmission points, panels, beams, transmission directions, etc. that can be distinguished via high-layer / L1 parameters (such as TCI states or spatial relationship information) or indicators (such as cell IDs, transmit / receive point (TRP) IDs, and panel IDs) can be described in a unified manner as transmit / receive points (TRPs), beams, or TCI states. Therefore, in practical applications, TRPs, beams, or TCI states can be appropriately replaced with one of the above terms.

[0088] NR time and frequency resources

[0089] The fifth generation (5G) mobile communication technology defines a wide frequency band, making high transmission rates and new services possible, and can be implemented not only in frequency bands below 6 gigahertz (GHz) such as 3.5 GHz, but also in frequency bands above 6 GHz (including 28 GHz and 39 GHz) known as millimeter wave (mmWave) bands. The sixth generation (6G) mobile communication technology (referred to as a super 5G system) has been considered to be implemented in terahertz (THz) bands (such as 95 GHz to 3 THz bands) to achieve a transmission rate fifty times faster than that of 5G mobile communication technology and an ultra-low latency that is one-tenth of that of 5G mobile communication technology.

[0090] At the beginning of the development of 5G mobile communication technology, in order to support services and meet the performance requirements related to enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication (URLLC) and massive machine type communication (mMTC), standardization has been carried out on technologies such as: beamforming and massive multiple-input multiple-output (MIMO) for alleviating radio wave path loss in millimeter waves and increasing the transmission distance of radio waves; parameter sets supporting dynamic operations for efficient utilization of millimeter wave resources and time slot formats (such as operating multiple subcarrier spacings); initial access technology for supporting multi-beam transmission and broadband; definition and operation of bandwidth part (BWP); new channel coding methods; such as low-density parity check (LDPC) codes for large amounts of data transmission and polarization codes for high-reliability transmission of control information; layer 2 (L2) preprocessing and network slicing for providing dedicated networks dedicated to specific services.

[0091] In view of the services supported by 5G mobile communication technology, discussions on the improvement and performance enhancement of initial 5G mobile communication technology are ongoing, and there is already physical layer standardization on technologies such as: vehicle-to-everything (V2X) that assists driving decisions of autonomous vehicles based on information about the location and status of the vehicle sent by the vehicle and improves user convenience; new radio unlicensed (NR-U) for system operation that is designed to comply with various regulatory requirements in unlicensed bands; NR user equipment (UE) power saving; non-terrestrial network (NTN), which is UE-satellite direct communication for providing coverage in areas where terrestrial network communication is not available; and positioning.

[0092] In addition, the following technologies are being standardized in terms of air interface architecture / protocols: Industrial Internet of Things (IIoT) to support new services through interworking and integration with other industries; Integrated Access and Backhaul (IAB) to provide nodes for network service area expansion by supporting wireless backhaul links and access links in an integrated manner; Mobility enhancements including conditional handover and dual active protocol stack (DAPS) handover; and Two-step Random Access Channel (2-step RACH for NR) to simplify the random access process. The following technologies are also being standardized in terms of system architecture / services: 5G baseline architecture (e.g., service-based architecture or service-based interface) for combining network function virtualization (NFV) and software defined network (SDN) technologies, and mobile edge computing (MEC) for receiving services based on UE location.

[0093] With the commercialization of 5G mobile communication systems, the already exponentially growing number of connected devices will be connected to the communication network, and it is therefore expected that there will be a need to enhance the functions and performance of 5G mobile communication systems and the integrated operation of connected devices. To this end, new research related to the following technologies is planned: Extended Reality (XR), effective support for Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR); Improvement of 5G performance and reduction of complexity by utilizing Artificial Intelligence (AI) and Machine Learning (ML); AI service support; Metaverse service support and drone communication.

[0094] This development of 5G mobile communication systems will serve not only as a basis for developing the following technologies: new waveforms for providing coverage in the terahertz band for 6G mobile communication technology; multi-antenna transmission technologies such as full-dimensional multiple-input multiple-output (FD-MIMO), array antennas, and large antennas; metamaterial-based lenses and antennas for improving the coverage of terahertz band signals; high-dimensional spatial multiplexing technology using orbital angular momentum OAM; and reconfigurable smart surfaces (RIS), but will also serve as a basis for developing the following technologies: full-duplex technology for increasing the frequency efficiency of 6G mobile communication technology and improving system networks; AI-based communication technology for achieving system optimization by leveraging satellites and AI from the design stage and internalizing end-to-end AI support functions; and next-generation distributed computing technology for implementing services at a complexity level that exceeds the limits of UE operating capabilities by utilizing ultra-high-performance communication and computing resources.

[0095] Wireless communication systems are evolving toward broadband wireless communication systems to provide high-speed, high-quality packet data services using communication standards such as High Speed ​​Packet Access (HSPA) of the 3rd Generation Partnership Project (3GPP), Long Term Evolution (LTE) or Evolved Universal Terrestrial Radio Access (E-UTRA), Long Term Evolution-Advanced (LTE-A), LTE-Pro, High Rate Packet Data (HRPD) of 3GPP2, Ultra Mobile Broadband (UMB), IEEE802.16e, etc., while also being used for traditional voice-based services.

[0096] For example, the LTE system adopts an orthogonal frequency division multiplexing (OFDM) scheme in a downlink (DL) and a single carrier frequency division multiple access (SC-FDMA) scheme in an uplink (UL). The UL indicates a radio link through which a UE transmits data or a control signal to a base station, and the downlink indicates a radio link through which a base station transmits data or a control signal to a UE. The above-mentioned multiple access scheme can separate data or control information of each user by allocating and operating time-frequency resources for transmitting data or control information to each user in order to avoid overlap and establish orthogonality.

[0097] As communication systems develop, research on UL transmission or reception using a plurality of panels is being conducted, and in particular, demand for improving UL control information transmission using a plurality of panels is increasing.

[0098] Figure 1 A basic structure of a time-frequency domain in a 5G system according to an embodiment is shown, which time-frequency domain is a radio resource region in which a data channel or a control channel is transmitted.

[0099] refer to Figure 1 , the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. The basic unit of resources in the time domain and the frequency domain is a resource element (RE) 101, and can be defined as 1 OFDM symbol 102 on the time axis and 1 subcarrier 103 on the frequency axis. (For example, 12) consecutive REs may constitute one resource block (RB) subcarrier 104. On the time axis, one subframe 110 may include a plurality of OFDM symbols 102. For example, the length of one subframe may be 1 ms.

[0100] Figure 2 Frame, subframe and time slot structures in a wireless communication system according to an embodiment are presented.

[0101] refer to Figure 2 , a frame 200 may be defined as 10 ms. A subframe 201 may be defined as 1 ms, and thus, one frame 200 may include a total of 10 subframes 201. A time slot 202 or 203 may be defined as 14 OFDM symbols (i.e., the number of symbols per time slot ). One subframe 201 may include one or more time slots 202 and 203, and the number of time slots 202 and 203 of each subframe 201 may vary according to the configured values ​​μ 204 and 205 for the subcarrier spacing. Figure 2 The example shows a case where the subcarrier spacing configuration value μ=0 204 and a case where the subcarrier spacing configuration value μ=1 205. If μ=0 204, one subframe 201 may include one time slot 202, and if μ=1 205, one subframe 201 may include two time slots 203. That is, the number of time slots per subframe is can vary according to the configured value μ of the subcarrier spacing and, therefore, the number of slots per frame Can be changed. According to each subcarrier spacing configuration μ and It can be defined as shown in Table 1 below.

[0102] Table 1

[0103]

[0104] Figure 3 A BWP configuration in a wireless communication system according to an embodiment is shown.

[0105] Figure 3 An example is shown in which the UE bandwidth 300 is configured to have two BWPs, namely, BWP#1 301 and BWP#2 302. The base station may configure one or more BWPs for the terminal, and may configure at least some of the information shown in Table 2 below for each BWP.

[0106] Table 2

[0107]

[0108] The present disclosure is not limited to the above examples, and in addition to the above configuration information, various parameters related to BWP can also be configured for the terminal. The base station can transmit the configuration information to the terminal via RRC signaling. At least one of the configured one or more BWPs can be activated. Whether the configured BWP is activated can be transmitted semi-statically from the base station to the terminal via RRC signaling or can be dynamically transmitted via DCI.

[0109] The terminal before RRC connection can be configured with an initial BWP for initial access through the base station via the master information block (MIB). For example, during initial access, the terminal can receive configuration information of the search space and control resource set (CORESET) through the MIB, and the physical downlink control channel (PDCCH) for receiving system information required for initial access (which may correspond to the remaining system information (RMSI) or system information block 1 (SIB1)) can be transmitted in the search space and control resource set. Each of the search space and CORESET configured via the MIB can be identified or regarded as an identifier (ID) 0. The base station can inform the terminal of the configuration information of the frequency allocation information, time allocation information, and parameter set such as CORESET#0 via the MIB, and can inform the terminal of the configuration information of the monitoring periodicity and monitoring opportunity for the control area #0, that is, the configuration information of the search space #0 via the MIB. The terminal can regard the frequency domain configured as CORESET#0 obtained from the MIB as the initial BWP for initial access. In this case, the ID of the initial BWP can be regarded as 0.

[0110] The BWP configuration supported in 5G can be used for various purposes.

[0111] In the case where the bandwidth supported by the UE is less than the system bandwidth, this can be supported via BWP configuration. For example, the base station can configure the frequency position of the BWP for the UE (e.g., configuration information 2), and thus, the terminal can transmit and / or receive data at a specific frequency position within the system bandwidth.

[0112] To support different parameter sets, the base station can configure multiple BWPs for the terminal. For example, to support data transmission or reception for a specific terminal using a subcarrier spacing of 15kHz and a subcarrier spacing of 30kHz, the base station can configure two BWPs with subcarrier spacings of 15kHz and 30kHz, respectively. Different BWPs can perform FDM, and when transmitting or receiving data with a specific subcarrier spacing, the BWP configured with the subcarrier spacing can be activated.

[0113] In order to reduce the power consumption of the terminal, the base station can configure a BWP with different bandwidth sizes for the terminal. For example, if the terminal supports a very large bandwidth such as 100 MHz, and always transmits or receives data via the corresponding bandwidth, it may cause excessive power consumption. In particular, when there is no traffic, excessive power consumption may be caused by performing unnecessary monitoring of the DL control channel with a large bandwidth of 100 MHz. In order to reduce the power consumption of the terminal, the base station can configure a BWP with a relatively small BWP such as 20 MHz for the terminal. When there is no traffic, the terminal can monitor in the BWP of 20 MHz, and when data is generated, the terminal can transmit or receive data by using the BWP of 100 MHz according to the instruction of the base station.

[0114] In the BWP configuration, the terminal before the RRC connection can receive the configuration information of the initial BWP via the MIB during the initial access. For example, the terminal can be configured with a CORESET for a DL control channel from the MIB of the physical broadcast channel (PBCH), on which DCI for scheduling SIBs can be transmitted. The bandwidth of the CORESET configured via the MIB can be regarded as or identified as the initial BWP, and the terminal can receive the PDSCH on which the SIB is transmitted via the configured initial BWP. In addition to the purpose of receiving SIBs, the initial BWP can also be used for other system information (OSI), paging and / or random access.

[0115] Changes to BWP

[0116] When one or more BWPs are configured for a terminal, the base station may instruct the terminal to change (or switch or transform) the BWP by using the BWP indicator field in the DCI. Figure 3In the case where the current active BWP of the terminal is BWP#1 301, the base station can indicate BWP#2 302 to the terminal by using the BWP indicator in the DCI, and the terminal can switch the BWP to BWP#2 302 indicated by the BWP indicator in the received DCI.

[0117] As described above, the DCI-based switching of BWP may be indicated by the DCI for scheduling PDSCH or PUSCH. Therefore, when receiving a request to switch BWP, the terminal may need to easily perform the transmission or reception of PDSCH or PUSCH scheduled by the corresponding DCI in the switched BWP. To this end, the delay time (T BWP ) requirements and can be defined as shown in Table 3 below.

[0118] Table 3

[0119]

[0120]

[0121] The delay time requirement for BWP switching may support type 1 or type 2 according to the capability of the terminal. The terminal may report the supportable BWP delay time type to the base station.

[0122] Based on the delay time requirement of BWP switching, when the terminal receives the DCI containing the BWP switching indicator in time slot n, the terminal can switch the BWP switching indicator to the same time slot no later than time slot n+T. BWP The base station completes the switching to the new BWP indicated by the BWP switching indicator at the time point of the switching, and the transmission and / or reception of the data channel scheduled by the DCI can be performed in the switched new BWP. When the base station is to schedule a data channel with a new BWP, the BWP switching delay time (T BWP ) to determine the time domain resource allocation of the data channel. That is, in the process of determining the time domain resource allocation of the data channel when the base station schedules a data channel with a new BWP, the data channel may be scheduled after the BWP switching delay time. Therefore, the terminal may not expect the DCI indicating the BWP switching to be less than the BWP switching delay time (T BWP )’s value.

[0123] In the case where the terminal receives a DCI indicating BWP switching (e.g., DCI format 1_1 or 0_1), the terminal may not perform any transmission or reception during a time period from the third symbol of the time slot in which the PDCCH including the DCI is received to the start point of the time slot indicated by the time slot offset (K0 or K2) indicated by the time domain resource allocation indicator field in the DCI. For example, in the case where the terminal receives a DCI indicating BWP switching in time slot n and the time slot offset value indicated by the DCI is K, the terminal may not perform any transmission or reception from the third symbol of time slot n to the symbol before time slot n+K (i.e., the last symbol of time slot n+K-1).

[0124] PDCCH: About DCI

[0125] In the 5G system, scheduling information for UL data (or PUSCH) or DL ​​data (or PDSCH) is transmitted from the base station to the UE via DCI. The terminal can monitor the fallback DCI format and non-fallback DCI format of PUSCH or PDSCH. The fallback DCI format may include a fixed field predefined between the base station and the terminal, and the non-fallback DCI format may include a configurable field.

[0126] DCI can be transmitted on the PDCCH via channel coding and modulation. A cyclic redundancy check (CRC) is attached to the DCI message payload and can be scrambled by a radio network temporary identifier (RNTI) corresponding to the identity of the terminal. For example, different RNTIs can be used depending on the purpose of the DCI message (e.g., terminal-specific (UE-specific) data transmission, power control commands, random access responses, etc.). In other words, the RNTI is not explicitly transmitted, but is included in the CRC calculation and transmitted. When receiving a DCI message transmitted on the PDCCH, the terminal can check the CRC by using the assigned RNTI, and can identify or determine that the message is addressed to the terminal if the CRC check is successful.

[0127] For example, the DCI for PDSCH scheduling of system information (SI) can be scrambled by SI-RNTI. The DCI for PDSCH scheduling of random access response (RAR) messages can be scrambled by RA-RNTI. The DCI for PDSCH scheduling of paging messages can be scrambled by P-RNTI. The DCI for notifying the slot format indicator (SFI) can be scrambled by SFI-RNTI. The DCI for notifying transmit power control (TPC) can be scrambled by TPC-RNTI. The DCI for scheduling UE-specific PDSCH or PUSCH can be scrambled by cell RNTI (C-RNTI).

[0128] DCI format 0_0 may be used as fallback DCI for PUSCH scheduling, where the CRC is scrambled by the C-RNTI. DCI format 0_0 where the CRC is scrambled by the C-RNTI may include information as shown in Table 4 below.

[0129] Table 4

[0130]

[0131] DCI format 0_1 ​​may be used as non-fallback DCI for PUSCH scheduling, where CRC is scrambled by C-RNTI. DCI format 0_1 ​​where CRC is scrambled by C-RNTI may include at least some of the information shown in Table 5 below.

[0132] Table 5

[0133]

[0134]

[0135] DCI format 1_0 may be used as fallback DCI for PDSCH scheduling, where CRC is scrambled by C-RNTI. DCI format 0_1 ​​where CRC is scrambled by C-RNTI may include at least some of the information shown in Table 6 below.

[0136] Table 6

[0137]

[0138]

[0139] DCI format 1_1 may be used as non-fallback DCI for PDSCH scheduling, where CRC is scrambled by C-RNTI. DCI format 1_1 where CRC is scrambled by C-RNTI may include at least some of the information shown in Table 7 below.

[0140] Table 7

[0141]

[0142]

[0143] QCL, TCI status

[0144] In a wireless communication system, one or more different antenna ports may be associated with each other via a quasi-co-location (QCL) configuration as shown in Table 8 below, where different antenna ports may be replaced with one or more channels and signals and combinations thereof, but in the following description of the present disclosure, for convenience, different antenna ports are referred to uniformly.

[0145] The TCI state is used to notify the QCL relationship between the PDCCH (or PDCCH DMRS) and another RS ​​or channel, where a specific reference antenna port A (reference RS#A) and another target antenna port B (target RS#B) are quasi-co-located with each other, indicating that the terminal is allowed to apply some or all large-scale channel parameters estimated at antenna port A to the channel measurement results according to antenna port B. For example, for QCL, different parameters may need to be associated, depending on the situation, such as time tracking affected by average delay and delay spread, 2) frequency tracking affected by Doppler shift and Doppler spread, radio resource management (RRM) affected by average gain, and beam management (BM) affected by spatial parameters. Therefore, NR can support four types of QCL relationships as shown in Table 8 below.

[0146] Table 8

[0147] QCL Type Large-scale features A Doppler shift, Doppler spread, average delay, delay spread B Doppler shift, Doppler spread C Doppler shift, average delay D Space Rx parameters

[0148] Spatial RX parameters may refer to some or all of various parameters, such as angle of arrival (AoA), power angular spectrum (PAS) of AoA, angle of departure (AoD), PAS of AoD, transmit / receive channel correlation, transmit / receive beamforming, and spatial channel correlation.

[0149] The QCL relationship can be configured for the UE via the RRC parameters TCI-State and QCL-Info, as shown in Table 9 below. Referring to Table 9, the base station can configure one or more TCI states (reference TCI state ID) for the terminal to notify up to two QCL relationships (qcl-Type1 and qcl-Type2) for the RS (ie, the target RS). Each piece of QCL information (QCL-Info) included in each of the TCI states includes a serving cell index indicated by the corresponding QCL information and a BWP index of the reference RS, a type and ID of the reference RS, and / or a QCL type (as shown in Tables 9 and 13 below).

[0150] Table 9

[0151]

[0152]

[0153] Figure 4 Base station beam assignment configured according to TCI status according to an embodiment is shown.

[0154] refer to Figure 4 , the base station can transmit information about N different beams to the terminal via N different TCI states. Figure 4 As shown, N=3, the base station can associate the qcl-Type2 parameters included in the three TCI states (i.e., TCI state #0 400, TCI state #1 405, and TCI state #2 410) with CSI-RS or SSB corresponding to different beams and be configured with QCL type D so as to declare that the antenna ports involving different TCI states 400, 405, or 410 are associated with different spatial Rx parameters (i.e., different beams).

[0155] Tables 10 to 14 shown below provide valid TCI state configurations according to the target antenna port type.

[0156] Table 10 shows the valid TCI state configuration when the target antenna port is a CSI-RS (ie, TRS) for tracking. TRS refers to an NZP CSI-RS in which no repetition parameter is configured in the CSI-RS and trs-Info is configured as true. Configuration No. 3 in Table 10 can be used for aperiodic TRS.

[0157] Table 10 may include valid TCI state configurations when the target antenna port is a CSI-RS for CSI.

[0158] Table 10

[0159]

[0160] The following Table 11 shows a valid TCI state configuration when the target antenna port is a CSI-RS for CSI. The CSI-RS for CSI refers to an NZP CSI-RS in which a parameter indicating repetition (eg, a repetition parameter) is not configured in the CSI-RS and trs-Info is not configured as true.

[0161] Table 11

[0162]

[0163]

[0164] Table 12 below shows the CSI-RS for beam management (BM) when the target antenna port is used (with the same antenna port as the CSI-RS for L1 reference information The CSI-RS for BM refers to the NZP CSI-RS in which the repetition parameter is configured and has the value On or Off and trs-Info is not configured as true.

[0165] Table 12

[0166]

[0167] Table 13 below shows Right Valid TCI state configuration when the target antenna port is PDCCH DMRS.

[0168] Table 13

[0169]

[0170]

[0171] Table 14 below shows the PDSCH Valid TCI state configuration for DMRS.

[0172] Table 14

[0173]

[0174] In the typical QCL configuration methods in Tables 10 to 14, each operating target antenna port and reference antenna port is configured and operated with "SSB" -> "TRS" -> "CSI-RS for CSI, CSI-RS for BM, PDCCH DMRS, or PDSCH DMRS". Based on this, the reception operation of the terminal can be assisted by associating statistical characteristics that can be measured from the SSB and TRS with the corresponding antenna port.

[0175] PDSCH: About frequency resource allocation

[0176] Figure 5 Frequency axis resource allocation of PDSCH in an embodiment of a wireless communication system is shown.

[0177] Specifically, Figure 5 Three frequency axis resource allocation (RA) methods including type 0 500, type 1 505, and dynamic switching 510 of two RA types 0&1 that can be configured via a higher layer in an NR wireless communication system are shown.

[0178] refer to Figure 5 , when the terminal is configured 500 via high-level signaling to use only resource type 0, a portion of the DCI for allocating PDSCH to the terminal may include a bitmap including an N_RBG bit. In this case, N_RBG refers to the number of RB groups (RBGs) determined according to the BWP size assigned by the BWP indicator and the high-level parameter rbg-Size as shown in Table 15 below, and data is transmitted to the RBG indicated by the bitmap as 1.

[0179] Table 15

[0180]

[0181]

[0182] In the case where the terminal is configured 505 to use only resource type 1 via high-layer signaling, some DCIs used to allocate PDSCH to the terminal may include frequency axis resource allocation information, the frequency axis resource allocation information including Based on this, the base station can configure the starting VRB 520 and the length 525 of the continuously allocated frequency axis resources.

[0183] In the case where the terminal is configured 510 to use both resource type 0 and resource type 1 via high-layer signaling, some DCI for allocating PDSCH to the terminal may include frequency-axis resource allocation information, which includes a payload 515 for configuring resource type 0 and a bit for configuring the maximum (max) value (or larger value) 535 of payloads 520 and 525 of resource type 1. In this case, one bit 530 may be added to the first part (most significant bit (MSB)) of the frequency-axis resource allocation information in the DCI, and in the case where the bit 530 has a value of "0", it may indicate that resource type 0 is used, and in the case where the bit has a value of "1", it may indicate that resource type 1 is used.

[0184] PDSCH / PUSCH: About time resource allocation

[0185] The base station can configure a table of time domain resource allocation information about PDSCH and PUSCH for the terminal via RRC signaling. A table including up to 16 entries (maxNrofDL-Allocations=16) can be configured for PDSCH, and a table including up to 16 entries (maxNrofUL-Allocations=16) can be configured for PUSCH. The time domain resource allocation information may include PDCCH-to-PDSCH time slot timing (expressed as K0, and corresponding to the time point in which the PDCCH is received and the time point in which the PDSCH scheduled by the received PDCCH is transmitted, in units of time slots), PDCCH-to-PUSCH time slot timing (expressed as K2, and corresponding to the time point in which the PDCCH is received and the time point in which the PUSCH scheduled by the received PDCCH is transmitted, in units of time slots) and information about the position and length of the starting symbol in which the PDSCH or PUSCH is scheduled within the time slot, and the mapping type of the PDSCH or PUSCH. For example, at least a portion of the information shown in Table 16 or Table 17 below may be transmitted from the base station to the terminal.

[0186] Table 16

[0187]

[0188] surface 17

[0189]

[0190] The base station may notify the terminal of one of the entries in the table related to the above-mentioned time domain resource allocation information via L1 signaling (e.g., DCI) (e.g., the entry may be indicated by the "time domain resource allocation" field in the DCI). The terminal may acquire the time domain resource allocation information for PDSCH or PUSCH based on the DCI received from the base station.

[0191] Figure 6 The time axis resource allocation of PDSCH in an embodiment of a wireless communication system is shown.

[0192] refer to Figure 6 The base station can dynamically indicate the start position (S) 600 and length (L) 605 of an OFDM symbol in a time slot 610 via DCI, the scheduling offset K0 value, and the subcarrier spacing (SCS) (μ PDSCH and μ PDCCH ) to indicate the time axis position of the PDSCH resource.

[0193] PDSCH: TCI state activated MAC-CE

[0194] Figure 7 The process of beam configuration and activation for PDSCH according to an embodiment is shown. In reference numeral 700, the list of TCI states for PDSCH can be indicated via a high-level list such as RRC. For each BWP, the list of TCI states can be indicated by tci-StatesToAddModList and / or tci-StatesToReleaseList in the PDSCH-Config IE. Next, some of the list of TCI states can be activated via MAC-CE, as shown in reference numeral 720. In the TCI state activated via MAC-CE, the TCI state for PDSCH can be self-indicated via DCI, as shown in reference numeral 740. The maximum number of activated TCI states can be determined based on the capabilities reported by the terminal. Reference numeral 750 shows an example of a MAC-CE structure for PDSCH TCI state activation / deactivation.

[0195] The meaning of each field in the MAC CE and the value that can be configured for each field may include at least some of the information shown in Table 18 below.

[0196] Table 18

[0197]

[0198]

[0199] PUCCH: About Transmission

[0200] In the NR system, the terminal can transmit control information (UCI) to the base station via PUCCH. The control information may include at least one of the following: HARQ-acknowledgement (HARQ-ACK) indicating the success or failure of demodulation / decoding of a transport block (TB) received by the terminal via PDSCH, a scheduling request (SR) for requesting resource allocation from the terminal to the PUSCH base station for UL data transmission, or CSI as information for a channel state report for the terminal.

[0201] According to the length of the assigned symbol, PUCCH resources can be mainly divided into long PUCCH and short PUCCH. In the NR system, the long PUCCH has a length of 4 symbols or more in a time slot, and the short PUCCH has a length of 2 symbols or less in a time slot.

[0202] Long PUCCH can be used to improve UL cell coverage and can therefore be transmitted in a DFT-S-OFDM scheme as a single carrier transmission rather than an OFDM transmission. Long PUCCH supports transmission formats such as PUCCH format 1, PUCCH format 3, and PUCCH format 4, depending on the number of control information bits that can be supported and whether terminal multiplexing is supported via Pre-DFT OCC support at the previous stage of Inverse Fast Fourier Transform (IFFT).

[0203] PUCCH format 1 is a DFT-S-OFDM-based long PUCCH format capable of supporting up to 2 bits of control information and uses a frequency resource of 1 RB. The control information may include each of HARQ-ACK and SR or a combination thereof. In PUCCH format 1, OFDM symbols including DMRS and OFDM symbols including UCI are configured in a repeated manner.

[0204] For example, when the number of transmitted symbols of PUCCH format 1 is 8 symbols, starting from the first starting symbol of the 8 symbols, DMRS symbol, UCI symbol, DMRS symbol, UCI symbol, DMRS symbol, UCI symbol, DMRS symbol and UCI symbol may be included in order. DMRS symbol may use an orthogonal code (or an orthogonal sequence or a spread code, w i(m)) is expanded into a sequence corresponding to the length of 1RB on the frequency axis within one OFDM symbol and can be transmitted after performing IFFT.

[0205] For the UCI symbol, the terminal may generate d(0) by BPSK modulating 1-bit control information and QPSK modulating 2-bit control information, multiply the generated d(0) by a sequence corresponding to the length of 1RB on the frequency axis to perform scrambling, and use an orthogonal code (or an orthogonal sequence or a spreading code, w) on the time axis. i (m)) to perform spreading into a scrambled sequence, and then perform transmission.

[0206] The terminal can generate a sequence based on the configured ID and the group hopping or sequence hopping configuration received from the base station via higher layer signaling, and generate a sequence corresponding to the length of 1RB by cyclically shifting the generated sequence, where the initial cyclic shift (CS) value is configured via a higher signal.

[0207] Given the length (NFS) of the spreading code shown in Table 19 below, Determine w as in i (m). i indicates the index of the spreading code itself, and m indicates the index of the element of the spreading code. The numbers in [] in Table 19 refer to When the length of the spreading code is 2 and the index of the configured spreading code is 0 (i=0), the spreading code w i (m) becomes and Make w i (m) = [1 1].

[0208] Table 19

[0209] Spreading code for PUCCH format 1

[0210]

[0211]

[0212] PUCCH format 3 is a DFT-S-OFDM-based long PUCCH format capable of supporting more than 2 bits of control information, and the number of RBs used can be configured via a higher layer. The control information may include each or a combination of HARQ-ACK, SR, and CSI. In PUCCH format 3, the DMRS symbol position is shown in Table 20 below, depending on whether additional DMRS symbols are configured and whether frequency hopping is configured within a slot.

[0213] Table 20

[0214]

[0215] If the number of transmission symbols of PUCCH format 3 is 8 symbols, DMRS is transmitted via the first symbol and the fifth symbol starting from the first starting symbol of 8 symbols being 0. Table 20 is applied in the same manner as the DMRS symbol position of PUCCH format 4.

[0216] PUCCH format 4 is a DFT-S-OFDM-based long PUCCH format that can support more than 2 bits of control information, and uses a frequency resource of 1RB. The control information may include each or a combination of HARQ-ACK, SR, and CSI. The difference between PUCCH format 4 and PUCCH format 3 is that, for PUCCH format 4, PUCCH format 4 of multiple terminals can be multiplexed within one RB. The multiplexing of PUCCH format 4 of multiple terminals can be achieved by applying the Pre-DFT orthogonal cover code (OCC) to the control information at the previous stage of IFFT. However, the number of control information symbols that can be transmitted by one terminal is reduced according to the number of multiplexed terminals. The number of multiplexed terminals (ie, the number of different available OCCs) can be 2 or 4, and the number of OCCs and the OCC index to be applied can be configured via a high layer.

[0217] The short PUCCH can be transmitted in both the DL center time slot and the UL center time slot, and in general, the short PUCCH can be transmitted at the last symbol of the time slot or the last OFDM symbol (for example, the last OFDM symbol, the second to last OFDM symbol, or the last 2 OFDM symbols). The short PUCCH can also be transmitted at a random position in the time slot. The short PUCCH can be transmitted using one OFDM symbol or two OFDM symbols, and when the UL cell coverage is good, it can be used to shorten the delay time compared to the long PUCCH, and can be transmitted using the CP-OFDM scheme.

[0218] Short PUCCH can support transmission formats such as PUCCH format 0 and PUCCH format 2 according to the number of control information bits that can be supported. PUCCH format 0 is a short PUCCH format that can support up to 2 bits of control information and uses a frequency resource of 1RB. For example, the control information may include each of HARQ-ACK and SR or a combination thereof. PUCCH format 0 has a structure in which DMRS is not transmitted within one OFDM symbol and only a sequence of 12 subcarriers mapped to the frequency axis is transmitted. The terminal can generate a sequence based on a configured ID and a group hopping or sequence hopping configuration received from a base station via a high-layer signal, cyclically shift the generated sequence by using a final CS value obtained by adding different CS values ​​to the indicated initial CS value according to ACK or negative acknowledgment (NACK), and map the cyclically shifted sequence to 12 subcarriers for transmission.

[0219] For example, for 1-bit HARQ-ACK, as shown in Table 21 below, if it is ACK, the terminal can generate the final CS by adding 6 to the initial CS value, and if it is NACK, the terminal can generate the final CS by adding 0 to the initial CS. The standard defines that the CS value of NACK is 0 and the CS value of ACK is 6, and the terminal can generate PUCCH format 0 according to the value defined in the standard to transmit 1-bit HARQ-ACK.

[0220] Table 21

[0221]

[0222] For example, in the case where HARQ-ACK is 2 bits, as shown in Table 22 below, for (NACK, NACK), the terminal adds 0 to the initial CS value, adds 3 to the initial CS value for (NACK, ACK), adds 6 to the initial CS value for (ACK, ACK), and adds 9 to the initial CS value for (ACK, NACK). The standard defines that the CS value of (NACK, NACK) is 0, the CS value of (NACK, ACK) is 3, the CS of (ACK, ACK) is 6, and the CS value of (ACK, NACK) is 9, and the terminal can generate PUCCH format 0 according to the value defined in the standard to transmit 2-bit HARQ-ACK. In the case where the final CS value exceeds 12 due to the addition of the CS value to the initial CS value according to ACK or NACK, since the sequence length is 12, the modulo 12 can be applied to the final CS value.

[0223] Table 22

[0224]

[0225] PUCCH format 2 is a short PUCCH format that supports more than 2 bits of control information, and the number of RBs used can be configured via higher layers. The control information may include each of HARQ-ACK, SR, and CSI or a combination thereof. When the index of the first subcarrier is #0, in PUCCH format 2, the position of the subcarrier transmitting DMRS within one OFDM symbol can be fixed to the subcarriers with indices #1, #4, #7, and #10. The control information can be mapped to the remaining subcarriers after excluding the subcarrier where the DMRS is located via modulation after channel coding.

[0226] The configurable values ​​of the above-mentioned PUCCH formats and the value ranges of these values ​​can be summarized as shown in the following Table 23, where "NA" is used to indicate the situation where no configuration value is required.

[0227] Table 23

[0228]

[0229] To improve UL coverage, PUCCH formats 1, 3 and 4 can support multi-slot repetition, and PUCCH repetition can be configured for each PUCCH format. The terminal can repeatedly transmit PUCCH including UCI as many times as the number of slots configured via nrofSlots as high-level signaling. For repeated PUCCH transmission, the PUCCH transmission in each slot can be performed using the same number of consecutive symbols, and the number of consecutive symbols can be configured via nrofSymbols as high-level signaling in PUCCH-format 1, PUCCH-format 3 or PUCCH-format 4. For repeated PUCCH transmission, the PUCCH transmission in each slot can be performed using the same starting symbol, and the starting symbol can be configured via startingSymbolIndex as high-level signaling in PUCCH-format 1, PUCCH-format 3 or PUCCH-format 4. For repeated PUCCH transmission, a single PUCCH-spatialRelationInfo can be configured for a single PUCCH resource. For repeated PUCCH transmission, in the case where the terminal is configured to perform frequency hopping in PUCCH transmission in different time slots, the terminal may perform frequency hopping in units of time slots.

[0230] If the terminal is configured to perform frequency hopping in PUCCH transmission in different time slots, the terminal can start PUCCH transmission from the first PRB index configured via startingPRB as high-level signaling in the even time slot, and the terminal can start PUCCH transmission from the second PRB index configured as secondHopPRB as high-level signaling in the odd time slot. Additionally, in the case where the terminal is configured to perform frequency hopping in PUCCH transmission in different time slots, the index of the time slot for the first PUCCH transmission indicated to the terminal is 0, and during the configured total number of repeated PUCCH transmissions, the value of the number of repeated PUCCH transmissions can be increased in each time slot, regardless of the execution of PUCCH transmission.

[0231] If the terminal is configured to perform frequency hopping in PUCCH transmissions in different time slots, the terminal does not expect to configure frequency hopping within the time slot during PUCCH transmission. In the case where the terminal is not configured to perform frequency hopping in PUCCH transmissions in different time slots, but is configured to perform frequency hopping within the time slot, the first PRB index and the second PRB index are applied equally in the time slot. If the number of UL symbols available for PUCCH transmission is less than nrofSymbols configured via high-level signaling, the terminal may not transmit PUCCH. Even if the terminal fails to transmit PUCCH in a specific time slot during repeated PUCCH transmission, the terminal may increase the number of repeated PUCCH transmissions.

[0232] PUCCH: PUCCH resource configuration

[0233] The base station may be able to configure the PUCCH resources of each BWP for a specific terminal via a higher layer. The PUCCH resource configuration is shown in Table 24 below.

[0234] Table 24

[0235]

[0236]

[0237] In Table 24, one or more PUCCH resource sets may be configured in the PUCCH resource configuration for a specific BWP, and a maximum payload value for UCI transmission may be configured in some PUCCH resource sets. Each PUCCH resource set may include one or more PUCCH resources, and each PUCCH resource may belong to one of the above-mentioned PUCCH formats.

[0238] For PUCCH resource sets, the maximum payload value of the first PUCCH resource set may be fixed to 2 bits. Therefore, it may not be possible to configure this value individually via higher layers. In the case of configuring the remaining PUCCH resource sets, the index of the PUCCH resource sets may be configured in ascending order of the maximum payload value, and the maximum payload value may not be configured for the last PUCCH resource set. The higher layer configuration of the PUCCH resource set may be as shown in Table 25 below.

[0239] Table 25

[0240]

[0241] The parameter resourceList in Table 25 may include IDs of PUCCH resources belonging to a PUCCH resource set.

[0242] During initial access or if no PUCCH resource set is configured, a PUCCH resource set including multiple cell-specific PUCCH resources in the initial BWP may be used as shown in Table 26 below. The PUCCH resources in the PUCCH resource set used for initial access may be indicated via SIB1.

[0243] Table 26

[0244]

[0245]

[0246] The maximum payload of each PUCCH resource included in the PUCCH resource set may be 2 bits for PUCCH format 0 or 1, and for the remaining formats, may be determined based on the symbol length, the number of PRBs, and / or the maximum coding rate. The symbol length and number of PRBs may be configured for each PUCCH resource, and the maximum coding rate may be configured for each PUCCH format.

[0247] For SR transmission, the PUCCH resources of the SR corresponding to the schedulingRequestID may be configured via a higher layer as shown in the following Table 27. The PUCCH resources may be resources belonging to PUCCH format 0 or PUCCH format 1.

[0248] Table 27

[0249]

[0250] For the configured PUCCH resources, the transmission period and offset may be configured via the parameter periodicityAndOffset of Table 27. If the terminal has UL data to transmit at a time point corresponding to the configured period and offset, the corresponding PUCCH resource may be transmitted. Otherwise, the corresponding PUCCH resource may not be transmitted.

[0251] For CSI transmission, the PUCCH resources used to transmit periodic or semi-persistent CSI reports via PUCCH can be configured in the parameter pucch-CSI-ResourceList as shown in Table 28. The parameter pucch-CSI-ResourceList may include a list of PUCCH resources specific to each BWP of the cell or CC in which the corresponding CSI report is to be transmitted. The PUCCH resource may belong to PUCCH format 2, PUCCH format 3, or PUCCH format 4. For this PUCCH resource, the transmission period and offset may be configured via reportSlotConfig as shown in Table 28 below.

[0252] Table 28

[0253]

[0254] For HARQ-ACK transmission, a resource set of PUCCH resources for transmission may be first selected based on the payload of the UCI including the corresponding HARQ-ACK. That is, a PUCCH resource set having a minimum payload greater than or equal to the UCI payload may be selected. The PUCCH resources in the PUCCH resource set may be selected via a PUCCH resource indicator (PRI) in the DCI for scheduling the TB corresponding to the HARQ-ACK, and the PRI may be a PUCCH resource indicator specified in Table 6 or Table 7. The relationship between the PRI and the PUCCH resources selected from the PUCCH resource set may be as shown in Table 29 below.

[0255] Table 29

[0256]

[0257] If the number of selected PUCCH resources in the PUCCH resource set is greater than 8, the PUCCH resources may be selected based on the following equation (1).

[0258] Equation (1)

[0259] In equation (1), r PUCCH represents the index of the selected PUCCH resource in the PUCCH resource set, RPUCCH represents the number of PUCCH resources belonging to the PUCCH resource set, Δ PRI Indicates the PRI value, N CCE,p represents the total number of CCEs of CORESET p to which the received DCI belongs, and n CCE,p Indicates the first CCE index of the received DCI.

[0260] The time point of transmitting the PUCCH resource is K from the time when the TB corresponding to the corresponding HARQ-ACK is transmitted. 1 After time slots, the value K 1 The candidate is configured via higher layers, and more specifically, can be configured in the parameter dl-DataToUL-ACK in PUCCH-Config specified in Table 27. One of the candidates K 1 The value may be selected by the PDSCH-to-HARQ feedback timing indicator in the DCI for scheduling the TB, and the value may be the value specified in Table 5 or Table 6. 1 The unit of the value may be a unit of a slot or a unit of a subslot. A subslot is a unit having a length smaller than a slot, and one or more symbols may constitute one subslot.

[0261] The terminal may transmit UCI via one or two PUCCH resources in one slot or subslot, and when UCI is transmitted via two PUCCH resources in one slot / subslot, i) the corresponding PUCCH resources do not overlap in symbol units, and ii) at least one PUCCH resource may be a short PUCCH. The terminal may not expect to transmit multiple PUCCH resources for HARQ-ACK transmission in one slot.

[0262] PUCCH: About transmit beam

[0263] If the terminal does not have UE-specific configuration for dedicated PUCCH resource configuration, a PUCCH resource set is provided via pucch-ResourceCommon as higher layer signaling, where the beam configuration used for PUCCH transmission complies with the beam configuration used in PUSCH transmission scheduled via random access response (RAR) UL grant.

[0264] In the case where the terminal has a UE-specific configuration for dedicated PUCCH resource configuration, the beam configuration for PUCCH transmission may be provided via the pucch-spatialRelationInfoId included in Table 24 as high-layer signaling. If the terminal is configured with one pucch-spatialRelationInfoId, the beam configuration for PUCCH transmission of the terminal may be provided via one pucch-spatialRelationInfoId. If the terminal is configured with multiple pucch-spatialRelationInfoIDs, the terminal may be instructed to activate one of the multiple pucch-spatialRelationInfoIDs via a MAC control element (CE). The terminal may be configured with up to eight pucch-spatialRelationInfoIDs via high-layer signaling, and may be instructed to activate only one of the pucch-spatialRelationInfoIDs. In the case where the terminal is instructed to activate any pucch-spatialRelationInfoID via MAC CE, the terminal activates the pucch-spatialRelationInfoID in the time slot from the time slot when HARQ-ACK is transmitted relative to the PDSCH for transmitting the MAC CE including the activation information of the pucch-spatialRelationInfoID. The first time slot after the first time slot shall be activated via pucch-spatialRelationInfoID of MAC CE. μ is the parameter set applied to PUCCH transmission, and Refers to the number of time slots in each subframe in a given parameter set. The high-level configuration for pucch-spatialRelationInfo can be as shown in Table 30 below.

[0265] Table 30

[0266]

[0267] In Table 30, there may be one referenceSignal configuration in a specific pucch-spatialRelationInfo configuration, and the referenceSignal may be an ssb-Index indicating a specific SS / PBCH, may be a csi-RS-Index indicating a specific CSI-RS, or may be an srs indicating a specific SRS. If the referenceSignal is configured with an ssb-Index, the terminal may configure the beam used when receiving the SS / PBCH corresponding to the ssb-Index among the SS / PBCH in the same serving cell as the beam used for PUCCH transmission, or if servingCellId is provided, the beam used when receiving the SS / PBCH corresponding to the ssb-Index among the SS / PBCH in the cell indicated by servingCellId may be configured as the beam used for PUCCH transmission.

[0268] In the case where referenceSignal is configured with csi-RS-Index, the terminal can configure the beam used when receiving the CSI-RS corresponding to the csi-RS-Index among the CSI-RS in the same serving cell as the beam for PUCCH transmission, or if servingCellId is provided, the beam used when receiving the CSI-RS corresponding to the csi-RS-Index among the CSI-RS in the cell indicated by servingCellId can be configured as the beam for PUCCH transmission.

[0269] In the case where ReferenceSignal is configured with SRS, the terminal may configure the transmit beam used when transmitting the SRS corresponding to the resource index provided via the higher-layer signaling resource within the same serving cell and / or within the activated UL BWP as the beam used for PUCCH transmission, or if servingCellID and / or UL BWP are provided, the transmit beam used when transmitting the SRS corresponding to the resource index provided via the higher-layer signaling resource in the cell indicated by the servingCellID and / or ULBWP and / or in the UL BWP may be configured as the beam used for PUCCH transmission. One pucch-PathlossReferenceRS-Id configuration may exist in a specific pucch-spatialRelationInfo configuration. The PUCCH-PathlossReferenceRS shown in Table 31 below can be mapped with the pucch-PathlossReferenceRS-Id of Table 30, and up to 4 configurations can be implemented via the pathlossReferenceRS in the upper layer signaling PUCCH-PowerControl of Table 31. If connected to SS / PBCH via higher layer signaling referenceSignal, PUCCH-PathlossReferenceRS may be configured with ssb-Index, and if connected to CSI-RS, may be configured with csi-RS-Index.

[0270] Table 31

[0271]

[0272]

[0273] PUCCH: Group-based spatial relationship activation

[0274] In NR version (Rel)-15, when the terminal is configured with multiple pucch-spatialRelationInfoIDs, the terminal can receive a MAC CE for activating the spatial relationship of each PUCCH resource, thereby determining the spatial relationship of the PUCCH resources. However, the disadvantage of this method is that too much signaling overhead is required to activate the spatial relationship of multiple PUCCH resources. Therefore, in Rel-16, a new MAC CE for adding PUCCH resource groups and activating spatial relationships in units of PUCCH resource groups has been introduced. For PUCCH resource groups, up to 4 PUCCH resource groups can be configured via resourceGroupToAddModList of Table 24, and for each PUCCH resource group, multiple PUCCH resource IDs in a PUCCH resource group can be configured as a list as shown in Table 32 below.

[0275] Table 32

[0276]

[0277]

[0278] In Rel-16, the base station can configure each PUCCH resource group for the terminal via the resourceGroupToAddModList in Table 24 and the high-level configuration of Table 32, and can configure the MAC CE for simultaneously activating the spatial relationship of all PUCCH resources in one PUCCH resource group.

[0279] Figure 8 A MAC CE for activation based on spatial relationship of PUCCH resource groups in an embodiment of a wireless communication system is presented.

[0280] refer to Figure 8, the supported cell ID 810 and the BWP ID 820 configured with the PUCCH resource to which the MAC CE is to be applied are indicated by octet (Oct) 1 800. The PUCCH resource ID 831 indicated by octet 2 830 and the PUCCH resource ID 841 indicated by octet 2N-2 840 indicate the ID of the PUCCH resource. If the indicated PUCCH resource is included in the PUCCH resource group according to resourceGroupToAddModList, different PUCCH resource IDs within the same PUCCH resource group are not indicated by the same MAC CE, and all PUCCH resources within the same PUCCH source group are activated using the same spatial relationship information IDs 836 and 846 indicated by octet 3 835 and octet 2N-1 845, respectively. In this case, the spatial relationship information IDs 836 and 846 include values ​​corresponding to PUCCH-SpatialRelationInfoId-1 to be applied to the PUCCH resource group of Table 30.

[0281] About SRS

[0282] The base station can configure at least one SRS configuration for each UL BWP to transmit configuration information for SRS transmission to the terminal, and can also configure at least one SRS resource set for each SRS configuration. For example, the base station and the terminal can transmit and receive high-layer signaling information as follows to transmit information about the SRS resource set.

[0283] -srs-ResourceSetId: SRS resource set index

[0284] -srs-ResourceIdList: A collection of SRS resource indexes referenced by the SRS resource set

[0285] -resourceType: The timeline transmission configuration of the SRS resource referenced by the SRS resource set, where resourceType can be configured as one of periodic, semi-persistent, and aperiodic. In the case where resourceType is configured as periodic or semi-persistent, the associated CSI-RS information can be provided according to the use of the SRS resource set. In the case where resourceType is configured as aperiodic, the aperiodic SRS resource trigger list and slot offset information can be provided, and the associated CSI-RS information can be provided according to the use of the SRS resource set.

[0286] -usage: Configuration for the usage of the SRS resources referenced by the SRS resource set, where usage can be configured as one of beamManagement, codebook, non-codebook, and antennaSwitching.

[0287] -alpha, p0, pathlossReferenceRS, srs-PowerControlAdjustmentStates: Provides parameter configuration for transmit power adjustment of SRS resources referenced by an SRS resource set.

[0288] The terminal may understand that the SRS resources included in the SRS resource index set referenced by the SRS resource set comply with the information configured in the SRS resource set.

[0289] The base station and the terminal may transmit and / or receive high-level signaling information to transmit separate configuration information for SRS resources. As an example, the separate configuration information for SRS resources may include time-frequency axis mapping information within the time slot of the SRS resources, and the time-frequency axis mapping information may include information about frequency hopping within or between time slots of the SRS resources. The separate configuration information for SRS resources may include a time axis transmission configuration for the SRS resources, and may be configured as one of periodic, semi-persistent, and aperiodic. This may be limited to having a time axis transmission configuration, such as an SRS resource set including SRS resources. In the case where the time axis transmission configuration of the SRS resources is configured as periodic or semi-persistent, the time axis transmission configuration may include additional SRS resource transmission periods and time slot offsets (e.g., periodicityAndOffset).

[0290] The base station can activate, deactivate or trigger SRS transmission for the terminal via L1 signaling (e.g., DCI) or high-level signaling including MAC CE signaling or RRC signaling. For example, the base station can activate or deactivate periodic SRS transmission for the terminal via high-level signaling. The base station can indicate the activation of an SRS resource set in which resourceType is configured as periodic via high-level signaling, and the terminal can transmit the SRS resource referenced by the activated SRS resource set. The time-frequency axis resource mapping within the time slot of the transmitted SRS resource complies with the resource mapping information configured in the SRS resource, and the time slot mapping including the transmission period and time slot offset complies with the periodicityAndOffset configured in the SRS resource. The spatial domain transmit filter applied to the transmitted SRS resource can refer to the spatial relationship information configured in the SRS resource, or can refer to the associated CSI-RS information configured in the SRS resource set including the SRS resource. The terminal can transmit SRS resources in the UL BWP activated for the periodic SRS resource activated via high-level signaling.

[0291] For example, the base station may activate or deactivate semi-persistent SRS transmission for the terminal via high-layer signaling. The base station may indicate activation of an SRS resource set via MAC CE signaling, and the terminal may transmit an SRS resource referenced by the activated SRS resource set. The SRS resource set activated via MAC CE signaling may be limited to an SRS resource set in which resourceType is configured as semi-persistent. The time-frequency axis resource mapping within the time slot of the transmitted SRS resource complies with the resource mapping information configured in the SRS resource, and the time slot mapping including the transmission period and time slot offset complies with the periodicityAndOffset configured in the SRS resource. The spatial domain transmit filter applied to the transmitted SRS resource may refer to the spatial relationship information configured in the SRS resource, or may refer to the associated CSI-RS information configured in the SRS resource set including the SRS resource. If spatial relationship information is configured in the SRS resource, instead of complying with the spatial relationship information, the spatial domain transmit filter may be determined by referring to the configuration information about the spatial relationship information transmitted via MAC CE signaling for activating semi-persistent SRS transmission. The terminal may transmit the SRS resource in the UL BWP activated for the semi-persistent SRS resource activated via higher layer signaling.

[0292] For example, the base station may trigger aperiodic SRS transmission to the terminal via DCI. The base station may indicate one of the aperiodic SRS-ResourceTrigger via the SRS request field of the DCI. The terminal may understand that the SRS resource set has been triggered, and the SRS resource set includes the aperiodic SRS resource trigger indicated in the aperiodic SRS resource trigger list in the configuration information of the SRS resource set via DCI. The terminal may transmit the SRS resource referenced by the triggered SRS resource set. The time-frequency axis resource mapping within the time slot of the transmitted SRS resource complies with the resource mapping information configured in the SRS resource. In addition, the time slot mapping of the transmitted SRS resource may be determined via the time slot offset between the PDCCH including the DCI and the SRS resource, which may refer to the value included in the time slot offset set configured in the SRS resource set. Specifically, for the time slot offset between the PDCCH including the DCI and the SRS resource, the value indicated by the time domain resource assignment field of the DCI among the offset values ​​included in the time slot offset set configured in the SRS resource set may be applied. The spatial domain transmit filter applied to the transmitted SRS resource may refer to the spatial relationship information configured in the SRS resource, or may refer to the associated CSI-RS information configured in the SRS resource set including the SRS resource. The terminal may transmit the SRS resource in the UL BWP activated for the aperiodic SRS resource triggered via DCI.

[0293] When the base station triggers aperiodic SRS transmission to the terminal via DCI, in order for the terminal to transmit SRS by applying the configuration information of the SRS resource, it may be necessary to include a minimum time interval between the PDCCH of the DCI that triggers the aperiodic SRS transmission and the transmitted SRS. The time interval for SRS transmission of the terminal can be defined as the number of symbols between the last symbol of the PDCCH including the DCI that triggers the aperiodic SRS transmission and the first symbol to which the first transmitted SRS resource in the transmitted SRS resource is mapped. The minimum time interval can be determined by referring to the PUSCH preparation process time required for the terminal to prepare for PUSCH transmission.

[0294] The minimum time interval may have different values ​​according to the use of the SRS resource set including the transmitted SRS resources. For example, the minimum time interval may be determined as N2 symbols according to the capabilities of the terminal in consideration of the terminal processing capability by referring to the PUSCH preparation process time of the terminal. When the use of the SRS resource set including the transmitted SRS resources is considered, and the use of the SRS resource set is configured as a codebook or antennaSwitching, the minimum time interval may be determined as N2 symbols. When the use of the SRS resource set is configured as a non-codebook or beamManagement, the minimum time interval may be determined as N2+14 symbols. In the case where the time interval for non-periodic SRS transmission is greater than or equal to the minimum time interval, the UE may transmit the non-periodic SRS, and in the case where the time interval for non-periodic SRS transmission is less than the minimum time interval, the terminal may ignore the DCI that triggers the non-periodic SRS. The spatialRelationInfo resource configuration is shown in Table 33 below.

[0295] Table 33

[0296]

[0297]

[0298] The spatialRelationInfo configuration information in Table 33 refers to one reference signal and applies the beam information of the reference signal to the beam used for corresponding SRS transmission. For example, the configuration of spatialRelationInfo may include information as shown in Table 34 below.

[0299] Table 34

[0300]

[0301] Referring to the configuration of spatialRelationInfo, the SS / PBCH block index, CSI-RS index and / or SRS index may be configured as the index of the reference signal to be referenced in order to use the beam information of a specific reference signal. The high-level signaling referenceSignal may be referenced as the configuration information indicating the reference signal, whose beam information will be referenced for the corresponding SRS transmission, ssb-Index may be referenced as the SS / PBCH block index, csi-RS-Index may be referenced as the CSI-RS index, and srs may be referenced as the SRS index. If the value of the high-level signaling referenceSignal is configured as ssb-Index, the terminal may apply the receive beam used when receiving the SS / PBCH block corresponding to ssb-Index as the transmit beam for SRS transmission. If the value of the high-level signaling referenceSignal is configured as csi-RS-Index, the terminal may apply the receive beam used when receiving the CSI-RS corresponding to csi-RS-Index as the transmit beam for SRS transmission. If the value of the higher-layer signaling referenceSignal is configured as srs, the terminal can apply the reception beam used when receiving the SRS corresponding to the srs as the transmission beam for SRS transmission.

[0302] PUSCH: About the transmission scheme

[0303] PUSCH transmission may be dynamically scheduled by UL grant in DCI, or may be operated by configured grant type 1 or type 2. Dynamic scheduling indication of PUSCH transmission may be implemented by DCI format 0_0 or 0_1.

[0304] For configured grant type 1 PUSCH transmission, UL grant in DCI may not be received, and configuration may be performed semi-statically by receiving configuredGrantConfig including rrc-ConfiguredUplinkGrant as shown in Table 35 below via high-layer signaling. After receiving configuredGrantConfig not including rrc-ConfiguredUplinkGrant of Table 35 via high-layer signaling, configured grant type 2 PUSCH transmission may be semi-persistently scheduled by UL grant in DCI. When PUSCH transmission is operated by configured grant, parameters applied to PUSCH transmission are applied via configuredGrantConfig as shown in Table 38 below as high-layer signaling, except for dataScramblingIdentityPUSCH, txConfig, codebookSubset, maxRank, and scaling of UCI-OnPUSCH provided via pusch-Config as shown in Table 36 below as high-layer signaling. If transformPrecoder is provided to the terminal in configuredGrantConfig in Table 35 as higher layer signaling, the terminal applies tp-pi2BPSK in pusch-Config of Table 36 for PUSCH transmission operated by the configured grant.

[0305] Table 35

[0306]

[0307]

[0308] The DRMS ​​antenna port used for PUSCH transmission is the same as the antenna port used for SRS transmission. PUSCH transmission can comply with the codebook-based transmission method and the non-codebook-based transmission method, depending on whether the value of txConfig in pusch-Config of Table 36 as the higher layer signaling corresponds to the codebook or non-codebook.

[0309] As described above, PUSCH transmission can be dynamically scheduled via DCI format 0_0 or 0_1, and can be semi-statically configured by a configured grant. In the case where the terminal is instructed to schedule PUSCH transmission via DCI format 0_0, the terminal performs beam configuration for PUSCH transmission by using the pucch-spatialRelationInfoID corresponding to the UE-specific PUCCH resource corresponding to the minimum ID within the UL BWP activated in the serving cell. In this case, PUSCH transmission is based on a single antenna port. The terminal does not expect to schedule PUSCH transmission via DCI format 0_0 within a BWP that is not configured with a PUCCH resource including pucch-spatialRelationInfo. If the terminal is not configured with txConfig in pusch-Config of Table 36, the terminal does not expect to be scheduled via DCI format 0_1.

[0310] Table 36

[0311]

[0312] Codebook-based PUSCH transmission can be dynamically scheduled via DCI format 0_0 or 0_1, and can be semi-statically operated by a configured grant. If the codebook-based PUSCH is dynamically scheduled via DCI format 0_1 ​​or semi-statically configured by a configured grant, the terminal determines the precoding for PUSCH transmission based on the SRS resource indicator (SRI), the transmission precoding matrix indicator (TPMI), and the transmission rank indicating the number of PUSCH transmission layers.

[0313] In this case, SRI may be given or configured to the UE via the SRS resource indicator field in the DCI, or may be configured via srs-ResourceIndicator as high-level signaling. During codebook-based PUSCH transmission, the terminal may be configured with at least one SRS resource and configured with up to two SRS resources. When SRI is provided to the terminal via DCI, for the SRS resource indicated by SRI, the SRS resource corresponding to SRI may be referenced from the SRS resource transmitted before the PDCCH including SRI. TPMI and transmission rank may be given or configured via the fields of precoding information and number of layers in the DCI, or may be configured via precodingAndNumberOfLayers as high-level signaling. For example, TPMI is used to indicate the precoding applied to PUSCH transmission. If the terminal is configured with one SRS resource, TPMI is used to indicate the precoding to be applied in one of the configured SRS resources. If the terminal is configured with multiple SRS resources, TPMI is used to indicate the precoding to be applied in the SRS resource indicated via SRI.

[0314] The precoding to be used for PUSCH transmission is selected from the UL codebook having the same number of antenna ports as the value of nrofSRS-Ports in SRS-Config as high-level signaling. In codebook-based PUSCH transmission, the terminal determines the codebook subset based on codebookSubset in pusch-Config as high-level signaling and TPMI. The codebookSubset in pusch-Config as high-level signaling can be configured as one of fullyAndPartialAndNonCoherent, partialAndNonCoherent or nonCoherent based on the UE capabilities reported by the terminal to the base station. If the terminal has reported partialAndNonCoherent as the UE capability, the terminal does not expect the value of codebookSubset as high-level signaling to be configured as fullyAndPartialAndNonCoherent. If the terminal has reported nonCoherent as the UE capability, the terminal expects the value of codebookSubset as high-level signaling to be configured as neither fullyAndPartialAndNonCoherent nor partialAndNonCoherent. If nrofSRS-Ports in SRS-ResourceSet as higher-layer signaling indicates two SRS antenna ports, the terminal does not expect the value of codebookSubset as higher-layer signaling to be configured as partialAndNonCoherent.

[0315] The terminal may be configured with an SRS resource set, where the usage value in the SRS-ResourceSet as the higher layer signaling is configured as a codebook, and one SRS resource in the SRS resource set may be indicated via SRI. If multiple SRS resources are configured in the SRS resource set, where the usage value in the SRS-ResourceSet as the higher layer signaling is configured as a codebook, the UE expects that the value of nrofSRS-Ports in the SRS-Resource as the higher layer signaling is configured to be the same for all SRS resources.

[0316] The terminal transmits one or more SRS resources included in the SRS resource set whose usage value is configured as a codebook to the base station according to high-level signaling, and the base station selects one of the SRS resources transmitted by the terminal and uses the corresponding SRS resource's transmit beam information to instruct the terminal to transmit PUSCH. In this case, in the codebook-based PUSCH transmission, SRI is used as information for selecting an index of an SRS resource and is included in the DCI. The base station adds information indicating the rank and TPMI to be used for the PUSCH transmission of the terminal to the DCI. The terminal uses the SRS resource indicated by SRI to perform PUSCH transmission by applying the precoding indicated by the TPMI and rank indicated based on the transmit beam of the SRS resource.

[0317] Non-codebook based PUSCH transmission can be dynamically scheduled via DCI format 0_0 or 0_1, and can be semi-statically operated by the configured grant. If at least one SRS resource is configured in the SRS resource set (where the usage value in the SRS-ResourceSet as the higher layer signaling is configured as non-codebook), the terminal can be scheduled as non-codebook based PUSCH transmission via DCI format 0_1.

[0318] For an SRS resource set configured as non-codebook as the usage value in the high-layer signaling SRS-ResourceSet, the terminal may be configured with a connected non-zero power (NZP) CSI-RS resource. The terminal may perform calculations on precoding for SRS transmission via measurements of the NZP CSI-RS resources connected to the SRS resource set. If the difference between the last received symbol of the aperiodic NZP CSI-RS resource connected to the SRS resource set and the first symbol of the aperiodic SRS transmission in the terminal is less than 42 symbols, the terminal does not expect to update information on precoding for SRS transmission.

[0319] In the case where the value of resourceType in SRS-ResourceSet as high-layer signaling is configured as non-periodic, the connected NZP CSI-RS can be indicated via the SRS request field in DCI format 0_1 ​​or 1_1. In this case, if the connected NZP CSI-RS resource is a non-periodic NZP CSI-RS resource, when the value of the SRS request field in DCI format 0_1 ​​or 1_1 is not 00, it indicates the presence of a connected NZP CSI-RS. In this case, the DCI should not indicate cross-carrier scheduling or cross-BWP scheduling. If the value of the SRS request indicates the presence of NZP CSI-RS, the NZP CSI-RS is located at a time slot in which a PDCCH including an SRS request field has been transmitted. In this case, the TCI state configured in the scheduled subcarrier is not configured as QCL-TypeD.

[0320] If a periodic or semi-persistent SRS resource set is configured, the connected NZP CSI-RS can be indicated via the associatedCSI-RS in the SRS-ResourceSet as the higher layer signaling. For non-codebook based transmission, the terminal does not expect the spatialRelationInfo as the higher layer signaling for the SRS resource and the associatedCSI-RS in the SRS-ResourceSet as the higher layer signaling to be configured together.

[0321] If multiple SRS resources are configured, the terminal can determine the precoding and transmission rank to be applied to the PUSCH transmission based on the SRI indicated by the base station. In this case, the SRI can be indicated via the SRS resource indicator field in the DCI, or can be configured via the srs-ResourceIndicator as a high-level signaling. As with the above-mentioned codebook-based PUSCH transmission, when the SRI is provided to the terminal via the DCI, the SRS resource indicated by the SRI refers to the SRS resource corresponding to the SRI among the SRS resources transmitted before the PDCCH including the SRI. The terminal can use one or more SRS resources for SRS transmission, and the maximum number of SRS resources that can be transmitted simultaneously in the same symbol within an SRS resource set can be determined by the UE capability reported by the terminal to the base station. In this case, the SRS resources transmitted simultaneously by the terminal occupy the same RB. The terminal configures one SRS port for each SRS resource. Only one SRS resource set can be configured, in which the usage value in the SRS-ResourceSet as a high-level signaling is configured as non-codebook, and up to 4 SRS resources for non-codebook-based PUSCH transmission can be configured.

[0322] The base station transmits one NZP CSI-RS connected to the SRS resource set to the terminal, and the terminal calculates the precoding to be used during the transmission of one or more SRS resources in the SRS resource set based on the measurement results during the reception of the NZP CSI-RS. The terminal applies the calculated precoding when transmitting one or more SRS resources in the SRS resource set to the base station, where usage is configured as non-codebook, and the base station can select one or more SRS resources from the received one or more SRS resources. In this case, in the non-codebook based PUSCH transmission, the SRI indicates an index that can express a combination of one SRS resource or multiple SRS resources, and the SRI can be included in the DCI. The number of SRS resources indicated by the SRI transmitted by the base station can be the number of PUSCH transmission layers, and the terminal can transmit PUSCH by applying the precoding applied to the SRS resource transmission to each layer.

[0323] PUSCH: Preparation process time

[0324] If the base station uses DCI format 0_0, 0_1 or 0_2 to schedule the terminal to transmit PUSCH, the terminal may need PUSCH preparation process time to transmit PUSCH by applying the transmission precoding method of the SRS resource, the number of transmission layers and / or the spatial domain transmission filter indicated by the DCI. In NR, the PUSCH preparation process time is defined taking into account the preparation time. The PUSCH preparation process time of the terminal can comply with the following equation (2).

[0325] T proc,2 =max((N 2 +d 2,1 +d 2 )(2048+144)k2 -μ T c +T ext +T switch ,d 2,2 )...(2)

[0326] T described above using equation (2) proc,2 Each variable in can have the following meanings.

[0327] -N 2 : The number of symbols determined by the parameter set μ and the UE processing capability 1 or 2 depending on the UE capability. If the UE processing capability 1 is reported according to the terminal's capability report, N 2 It may have the values ​​shown in Table 37 below, and if UE processing capability 2 is reported and UE processing capability 2 is configured via higher layer signaling as available, then N 2 It may have the values ​​shown in Table 38 below.

[0328] Table 37

[0329] μ <![CDATA[PUSCH preparation time N 2 (symbol)]]> 0 10 1 12 2 23 3 36

[0330] Table 38

[0331] μ <![CDATA[PUSCH preparation time N 2 (symbol)]]> 0 5 1 5.5 2 For frequency range 1, 11

[0332] -d 2,1 : When all REs of the first OFDM symbol of PUSCH transmission are configured to include only DM-RS, the number of symbols is determined to be 0, otherwise it is determined to be 1.

[0333] -K:64

[0334] -μ:μ follows μ DL or μ UL One of the proc,2 Has a larger value. DL A parameter set indicating a DL in which a PDCCH including DCI for PUSCH scheduling is transmitted, and μ UL A parameter set indicating the UL in which the PUSCH is transmitted.

[0335] -T c :1 / (Δf max ·N f ), Δf max =480·10 3 Hz,N f =4096

[0336] -d 2,2 : When the DCI for scheduling PUSCH indicates BWP switching, d 2,2 Follows the BWP switching time, otherwise has 0.

[0337] -d 2 : If the OFDM symbols of PUCCH, PUSCH with high priority index and PUCCH with low priority index overlap in time, the OFDM symbol of PUSCH with high priority index is used. 2 Otherwise, d 2 is 0.

[0338] -T ext : If the terminal uses a shared spectrum channel access solution, the terminal can calculate T ext And apply it to the PUSCH preparation process time. Otherwise, assume T ext is 0.

[0339] -T switch, : If the UL switching interval is triggered, it is assumed that T switch,is the switching interval. Otherwise, assume T switch, is 0.

[0340] Considering the time axis resource mapping information of the PUSCH scheduled via DCI and the timing advance effect between UL and DL, when the first symbol of the PUSCH starts before the first UL symbol, the base station and the terminal determine that the PUSCH preparation process time is insufficient, and the CP in the first UL symbol is T from the last symbol of the PDCCH including the DCI for scheduling the PUSCH. proc,2 Otherwise, the base station and the UE determine that the PUSCH preparation process time is sufficient. If the PUSCH preparation process time is sufficient, the terminal transmits the PUSCH, and if the PUSCH preparation process time is insufficient, the terminal may ignore the DCI for scheduling the PUSCH.

[0341] PUSCH: About the launch

[0342] In the 5G system, as two methods for repeated transmission of a UL data channel, repeated PUSCH transmission type A and repeated PUSCH transmission type B are supported. The terminal may be configured with one of repeated PUSCH transmission types A or B via higher layer signaling.

[0343] 1. Repeated PUSCH transmission type A

[0344] -The symbol length and the position of the starting symbol of the UL data channel are determined within one time slot by the time domain resource allocation method, and the base station can inform the terminal of the number of repeated transmissions via RRC signaling or L1 signaling (eg, DCI).

[0345] -The terminal may repeatedly transmit a UL data channel in consecutive time slots based on the number of repeated transmissions received from the base station, the UL data channel having the same length and starting symbol as the configured length and starting symbol of the UL data channel. In this case, when at least one of the symbols of the UL data channel configured by the base station for the terminal or the time slot for DL ​​configured for the terminal is configured for DL, the terminal omits the UL data channel transmission, but may count the number of repeated transmissions of the UL data channel.

[0346] 2. Repeated PUSCH transmission type B

[0347] -The starting symbol and length of the UL data channel are determined within one time slot by a time domain resource allocation method, and the base station can inform the terminal of the number of repetitions of repeated transmission via RRC signaling or L1 signaling (eg, DCI).

[0348] -Based on the configured starting symbol and length of the UL data channel, the UL data can be determined as follows

[0349] numberofrepetitions-1, S is the configured starting symbol of the UL data channel, and L indicates the configured symbol length of the UL data channel. s indicates the time slot in which the PUSCH transmission starts, and Indicates the number of symbols per slot.

[0350] -The terminal may determine an invalid symbol for repeating PUSCH transmission type B. The symbol configured for DL ​​by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated is determined as an invalid symbol for repeating PUSCH transmission type B. The invalid symbol may be configured by a higher-level parameter (e.g., InvalidSymbolPattern). The higher-level parameter (e.g., InvalidSymbolPattern) may provide a symbol-level bitmap on one slot or two slots so that an invalid symbol may be configured. A 1 in the bitmap indicates an invalid symbol. The period and pattern of the bitmap may be configured via a higher-level parameter (e.g., periodicityAndPattern). If a higher-level parameter (e.g., InvalidSymbolPattern) is configured and the parameter InvalidSymbolPatternIndicator-ForDCIFormat0_1 or InvalidSymbolPatternIndicator-ForDCIFormat0_2 indicates 1, the terminal may apply an invalid symbol pattern. If the parameter indicates 0, the terminal may not apply an invalid symbol pattern. If a higher layer parameter (eg, InvalidSymbolPattern) is configured and the parameter InvalidSymbolPatternIndicator-ForDCIFormat0_1 or InvalidSymbolPatternIndicator-ForDCIFormat0_2 is not configured, the terminal applies the invalid symbol mode.

[0351] After determining the invalid symbol, for each nominal repetition, the terminal may treat the symbol other than the invalid symbol as a valid symbol. If one or more valid symbols are included in each nominal repetition, the nominal repetition may include one or more actual repetitions. The corresponding actual repetition includes a continuous set of valid symbols of the repetitive PUSCH transmission type B that can be used in one time slot.

[0352] Fig. 9 A repeated PUSCH transmission type B in a wireless communication system according to an embodiment is shown.

[0353] refer to Fig. 9 , for the terminal, the start symbol S of the UL data channel may be configured as 0, the length L of the UL data channel may be configured as 14, and the number of repeated transmissions may be configured as 16. In this case, the nominal repetition 901 is shown in 16 consecutive time slots. Then, the terminal may determine the symbol configured as the DL symbol in each nominal repetition 901 as an invalid symbol. The terminal determines the symbol configured as 1 in the invalid symbol pattern 902 as an invalid symbol. In each nominal repetition 901, if a valid symbol that is not an invalid symbol includes one or more consecutive symbols in one time slot, an actual repetition 903 is configured and transmitted.

[0354] Regarding repeated PUSCH transmission, in Rel-16, the following additional methods may be defined for UL grant-based PUSCH transmission on slot boundaries and configured grant-based PUSCH transmission.

[0355] - Method 1 (mini-slot level repetition): via one UL grant, two or more repeated PUSCH transmissions are scheduled within one slot or on the boundary of consecutive slots. In addition, with respect to method 1, the time domain resource allocation information in the DCI indicates the resources of the first repeated transmission. The time domain resource information of the remaining repeated transmissions can be determined based on the time domain resource information of the first repeated transmission and the UL or DL ​​direction determined for each symbol of each slot. Each repeated transmission occupies consecutive symbols.

[0356] -Method 2 (multi-segment transmission): Two or more repeated PUSCH transmissions are scheduled in consecutive time slots via one UL grant. In this case, one transmission is specified for each time slot, and the starting point or repetition length of each transmission may be different. In method 2, the time domain resource allocation information in the DCI indicates the starting point and repetition length of all repeated transmissions. When repeated transmission is performed within a single time slot via method 2, if there are multiple bundles of consecutive UL symbols in the time slot, each repeated transmission is performed for each bundle of UL symbols. If a bundle of consecutive UL symbols exists only uniquely in the corresponding time slot, one repeated PUSCH transmission is performed according to the method of NR Rel-15.

[0357] -Method 3: Schedule two or more repeated PUSCH transmissions in consecutive time slots via two or more UL grants. In this case, one transmission is assigned to each time slot, and the nth UL grant can be received before the PUSCH transmission scheduled via the (n-1)th UL grant ends.

[0358] -Method 4: One or more repeated PUSCH transmissions within a single time slot, or two or more repeated PUSCH transmissions on the boundary of consecutive time slots, may be supported via a UL grant or a configured grant. The number of repetitions indicated by the base station to the terminal is a nominal value, and the number of repeated PUSCH transmissions actually performed by the terminal may be greater than the nominal number of repetitions. The time domain resource allocation information in the DCI or configured grant refers to the resources of the first repeated transmission indicated by the base station. The time domain resource information of the remaining repeated transmissions can be determined by at least partially referring to the resource information of the first repeated transmission and the UL or DL ​​direction of the symbol. If the time domain resource information of the repeated transmission indicated by the base station crosses the time slot boundary or includes a UL / DL switching point, the repeated transmission may be divided into multiple repeated transmissions. In this case, one repeated transmission may be included for each UL cycle in a time slot.

[0359] PUSCH: Frequency Hopping Process

[0360] In 5G, as a frequency hopping method for the UL data channel, two methods can be supported for each repetition PUSCH transmission type. Repetition PUSCH transmission type A can support intra-slot frequency hopping and inter-slot frequency hopping, and repetition PUSCH transmission type B can support inter-repetition frequency hopping and inter-slot frequency hopping.

[0361] In the intra-slot frequency hopping method supported by repeated PUSCH transmission type A, the terminal changes the allocated frequency domain resources according to the configured frequency offset in two hops within one slot and performs transmission. In intra-slot frequency hopping, the starting RB of each hop can be expressed via the following equation (3).

[0362]

[0363] In equation (3), i=0 and i=1 indicate the first hop and the second hop, respectively, and RB start Indicates the starting RB in the UL BWP and is calculated based on the frequency resource allocation method. RB offset The frequency offset between two hops is indicated via a higher-level parameter. The number of symbols in the first hop can be determined by Indicated by, and the number of symbols in the second hop can be determined by instruct. It is the length of a PUSCH transmission within one slot and is represented by the number of OFDM symbols.

[0364] In the inter-slot frequency hopping method supported by the repeated PUSCH transmission types A and B of this document, the terminal changes the allocated frequency domain resources according to the configured frequency offset for each time slot and performs transmission. During a time slot, the starting RB can be expressed by the following equation (4).

[0365]

[0366] In equation (4), Indicates the current slot number in a multi-slot PUSCH transmission, and RB start Indicates the starting RB in the ULBWP and is calculated based on the frequency resource allocation method. RB offset The frequency offset between two hops is indicated via a higher layer parameter.

[0367] The inter-repetition frequency hopping method supported by repeated PUSCH transmission type B includes performing transmission by moving resources allocated in the frequency domain by as much as the configured frequency offset for one or more actual repetitions within each nominal repetition. RB start (n) can comply with the following equation (5).

[0368]

[0369] In equation (5), n indicates the index of the nominal repetition, and RB offset The RB offset between two hops is indicated via a higher layer parameter.

[0370] Rate matching for UCI multiplexed on PUSCH

[0371] Before describing the rate matching of UCI, the case where UCI is multiplexed on PUSCH is described first. The terminal transmits multiple overlapping PUCCHs or overlapping PUCCHs and PUSCHs in one time slot, and the terminal is configured to multiplex different UCI types on one PUCCH. If at least one of the multiple overlapping PUCCHs or PUSCHs is a signal transmitted when the terminal receives a DCI format, the terminal can multiplex all corresponding UCI types that meet the timeline conditions as described in detail in the standard. As an example of the timeline condition for UCI multiplexing, if one of the PUCCH transmission or PUSCH transmission is scheduled via DCI, only the first symbol S of the earliest PUCCH or PUSCH among the overlapping PUCCH and PUSCH in the time slot is used. 0 The terminal can perform UCI multiplexing only when the following conditions are met:

[0372] -S 0 Not including the last symbol of the corresponding PDSCH Here, for the i-th PDSCH associated with HARQ-ACK transmitted on PUCCH in an overlapping PUCCH and PUSCH group, yes The maximum value of . is the processing time of the ith PDSCH and is defined as Here, d 1,1 is the value determined by the reference standard for the i-th PDSCH, and N 1 is the PDSCH processing time value according to the PDSCH processing capability. In addition, μ is the minimum subcarrier configuration value among all PUSCHs in the overlapping PUCCH and PUSCH group, including the PUCCH for HARQ-ACK of the i-th PDSCH, the i-th PDSCH, and the PDCCH for scheduling the i-th PDSCH. T c is 1 / (Δf max ·N f ), where Δf max =480·10 3 Hz, and N f =4096, and K is 64.

[0373] This is part of the timeline condition for UCI multiplexing, and when the timeline condition is met by the reference standard, the terminal can perform UCI multiplexing on the PUSCH. When PUCCH and PUSCH overlap and meet the timeline condition for UCI multiplexing described in detail in the standard including the above example, the terminal can multiplex the HARQ-ACK and / or CSI information included in the PUCCH on the PUSCH according to the UCI information included in the PUSCH, and the PUCCH may not be transmitted.

[0374] If PUCCH and PUSCH overlap, the timeline condition of UCI multiplexing is met, and the terminal determines to multiplex the UCI included in the PUCCH on the PUSCH, the terminal can perform UCI rate matching on the UCI multiplexing. UCI multiplexing is performed in the order of HARQ-ACK, configured grant UL control information (CG-UCI), CSI part 1, and CSI part 2. The terminal performs rate matching in consideration of the UCI multiplexing order. Therefore, the terminal calculates the per-layer coded modulation symbols for HARQ-ACK and CG-UCI, and taking this into account, the terminal calculates the per-layer coded modulation symbols for CSI part 1. Thereafter, the terminal calculates the per-layer coded modulation symbols for CSI part 2 in consideration of the per-layer coded modulation symbols for HARQ-ACK, CG-UCI, and CSI part 1.

[0375] When rate matching is performed according to each UCI type, the method for calculating the number of coded modulation symbols per layer varies according to the repetition transmission type of the PUSCH on which the UCI is multiplexed and whether UL data (UL shared channel, hereinafter referred to as UL-SCH) is included. For example, when rate matching of HARQ-ACK is performed, the equations for the coded modulation symbols per layer of the PUSCH on which the UCI is multiplexed are shown in the following equations (6), (7), and (8).

[0376]

[0377]

[0378] Equation (6) is used for each layer of coded modulation symbols of HARQ-ACK multiplexed on PUSCH instead of repeated PUSCH transmission type B including UL-SCH. Equation (7) is used for each layer of coded modulation symbols of HARQ-ACK multiplexed on repeated PUSCH transmission type B including UL-SCH. Equation 8 is used for each layer of coded modulation symbols of HARQ-ACK multiplexed on PUSCH not including UL-SCH.

[0379] In equation (6), O ACK is the number of HARQ-ACK bits. ACK is the number of CRC bits of HARQ-ACK. is the β offset of HARQ-ACK and is equal to C UL-S is the number of UL-SCH code blocks used for PUSCH transmission, and K r is the code block size of the rth code block. Indicates the number of REs that can be used for UCI transmission in symbol 1, and is determined based on the presence or absence of DMRS and PTRS in symbol 1. If symbol 1 includes DMRS, then For symbol l not including DMRS, is the number of subcarriers of the bandwidth scheduled for PUSCH transmission, and is the number of subcarriers including PTRS in symbol 1. Indicates the total number of PUSCH symbols. α is a higher layer parameter scaling and refers to the ratio of resources on which UCI can be multiplexed among all PUSCH transmission resources. o Indicates the index of the first symbol that does not include a DMRS after the first DMRS.

[0380] In equation (7), Indicates the number of REs available for nominally repeated UCI transmissions and is 0 for symbols including DMRS. For symbols not including DMRS, And for PUSCH assuming nominal repetition, is the number of subcarriers including PTRS in symbol 1. Indicates the total number of symbols that the nominal PUSCH is repeated. Indicates the number of REs available for actual repeated UCI transmission and is 0 for symbols including DMRS. For symbols not including DMRS, And for the actual PUSCH repetition, is the number of subcarriers including PTRS in symbol 1. Indicates the total number of symbols actually repeated for PUSCH.

[0381] In equation (8), R is the PUSCH code rate, and Q m is the modulation order of PUSCH.

[0382] The number of coded modulation symbols per layer for which rate matching has been performed for CSI part 1 can be calculated similarly to HARQ-ACK, but the maximum number of allocable resources among all resources can be reduced to a value obtained by excluding the number of coded modulation symbols for HARQ-ACK / CG-UCI. Depending on the repeated PUSCH transmission type and whether UL-SCH is included, the equations for the coded modulation symbols per layer for CSI part 1 are shown in the following equations (9), (10), (11), and (12).

[0383]

[0384] Equation (9) is used for each layer of coded modulation symbols of CSI part 1 multiplexed on PUSCH other than repeated PUSCH transmission type B including UL-SCH. Equation (10) is used for each layer of coded modulation symbols of CSI part 1 multiplexed on repeated PUSCH transmission type B including UL-SCH. Equation (11) is used for obtaining each layer of coded modulation symbols of multiplexed CSI part 1 when CSI part 1 and CSI part 2 are multiplexed on PUSCH not including UL-SCH. Equation (12) is used for obtaining each layer of coded modulation symbols of multiplexed CSI part 1 when CSI part 2 is not multiplexed on PUSCH not including UL-SCH. In equation 9, O CSI-1 and L CSI-1 They refer to the number of bits used for CSI part 1 and the number of CRC bits used for CSI part 1, respectively. is the β offset of CSI part 1 and is equal to O′ ACK / CG-UCIis the number of coded modulation symbols per layer calculated for HARQ-ACK and / or CG-UCI. The other parameters are the same as those required for calculating the number of coded modulation symbols per layer for HARQ-ACK.

[0385] The number of coded modulation symbols per layer for which rate matching has been performed for CSI part 2 can also be calculated similarly to CSI part 1, but the maximum number of allocable resources among all resources can be reduced to a value obtained by excluding the number of coded modulation symbols for CSI part 2 and the number of coded modulation symbols for HARQ-ACK / CG-UCI. Depending on the repeated PUSCH transmission type and whether UL-SCH is included, the equations for the coded modulation symbols per layer for CSI part 1 are shown in the following equations (13), (14), and (15).

[0386]

[0387] Equation (13) is used for each layer of coded modulation symbols of CSI Part 2 multiplexed on PUSCH other than repeated PUSCH transmission type B including UL-SCH. Equation (14) is used for each layer of coded modulation symbols of CSI Part 2 multiplexed on repeated PUSCH transmission type B including UL-SCH. Equation (15) is used for each layer of coded modulation symbols of CSI Part 2 multiplexed on PUSCH not including UL-SCH. In equation (13), O CSI-2 and L CSI-2 They refer to the number of bits used for CSI part 2 and the number of CRC bits used for CSI part 2, respectively. is the β offset of CSI part 2 and is equal to The other parameters are the same as those required above to calculate the number of coded modulation symbols per layer for HARQ-ACK and CSI part 1.

[0388] The number of per-layer coded modulation symbols for which rate matching of CG-UCI has been performed can also be calculated similarly to HARQ-ACK. The following equation (16) is used for per-layer coded modulation symbols of CG-UCI multiplexed on PUSCH including UL-SCH.

[0389]

[0390] In equation (16), O CG-UCI and L CG-UCI They respectively refer to the number of bits used for CG-UCI and the number of bits used for CRC of CG-UCI. is the β shift of CG-UCI and is equal to The other parameters are the same as those mentioned above for calculating the number of coded modulation symbols per layer for HARQ-ACK.

[0391] When HARQ-ACK and CG-UCI are multiplexed on PUSCH including UL-SCH, the number of coded modulation symbols per layer for which rate matching of HARQ-ACK and CG-UCI has been performed can be calculated as shown in the following equation (17).

[0392]

[0393] In equation (17), is the β offset of HARQ-ACK and is equal to And the other parameters are the same as the above parameters required to calculate the number of coded modulation symbols per layer for HARQ-ACK.

[0394] After calculating the number of coded modulation symbols per layer according to each UCI type as described above, the number of coded modulation symbols per layer can be calculated based on E UCI =N L ·Q′·Q m To calculate the number of digits E used for the entire UCI UCI , where N L is the number of PUSCH transmission layers, Q m is the modulation order, and Q′ is the number of coded modulation symbols per layer according to the UCI type, which can be O′ ACK , O′ CSI-1 , O′ CSI-2 or Q′ CG-UCI .

[0395] About UE Capability Report

[0396] In LTE and NR, when a terminal is connected to a serving base station, the terminal can report the capabilities supported by the terminal to the base station. This is referred to as UE capability reporting in this article.

[0397] The base station may transmit a UE capability query message for requesting a capability report to the connected terminal. The message may include a UE capability request for each radio access technology (RAT) type of the base station. The request for each RAT type may include supported band combination (BC) information, etc. In addition, for the UE capability query message, a RRC message container transmitted by the base station may be used to request the UE capability for each of the multiple RAT types, or the base station may include a UE capability query message, which includes a UE capability request for each RAT type, so as to transmit the request to the terminal. That is, the UE capability query is repeated multiple times in one message, and the terminal may configure the corresponding UE capability information message and report multiple times. In the next generation mobile communication system, a UE capability request for multi-RAT dual connection (MR-DC), LTE and NR including E-UTRA-NR dual connection (EN-DC) may be issued. The UE capability query message is generally initially transmitted after the terminal is connected to the base station, but may be requested by the base station when necessary in any case.

[0398] In the above method, the terminal that receives the request for UE capability report from the base station can configure the UE capability according to the RAT type and frequency band information requested from the base station. Hereinafter, a method for configuring UE capability by the terminal in the NR system will be described.

[0399] 1. If the terminal receives a list of LTE and / or NR bands from the base station via a UE capability request, the terminal configures BC for NR standalone (SA) and EN-DC. That is, the terminal configures a candidate list of BCs for NR SA and EN-DC based on the bands requested from the base station via FreqBandList. The bands have priorities in the order described in FreqBandList.

[0400] 2. If the base station requests UE capability reporting by setting the eutra-nr-only flag or the eutra flag, the terminal completely removes the NR SA BC from the configured BC candidate list. This is only possible if the LTE base station (eNB) requests eutra capability.

[0401] 3. Thereafter, the terminal removes the fallback BC from the candidate list of configured BCs. The fallback BC refers to a BC that can be obtained by removing the frequency band corresponding to at least one SCell from the random BC. The frequency band corresponding to at least one SCell can be omitted because the BC before the removal is already able to cover the fallback BC. This operation also applies to MR-DC, i.e., the LTE frequency band. The remaining BCs after this operation constitute the final candidate BC list.

[0402] 4. The terminal selects the BC to be reported by selecting a BC that meets the requested RAT type from the final candidate BC list. In this operation, the terminal configures the supportedBandCombinationList in a predetermined order. That is, the terminal configures the BC and the UE capabilities to be reported according to the pre-configured rat-Type order (nr->eutra-nr->eutra). The terminal configures featureSetCombination for the configured supportedBandCombinationList and configures a list of candidate feature set combinations from the candidate BC list from which the list of fallback BCs (including equal or lower level capabilities) has been removed. The candidate feature set combination may include two feature set combinations for NR and EUTRA-NR BCs. The candidate feature set combination can be obtained from the feature set combinations of the UE-NR-Capabilities and UE-MRDC-Capabilities containers.

[0403] 5. If the requested rat type is eutra-nr and has impact, featureSetCombinations is included in both containers of UE-MRDC-Capabilities and UE-NR-Capabilities. However, feature sets for NR are only included in UE-NR-Capabilities.

[0404] After configuring the UE capabilities, the terminal transmits a UE capability information message including the UE capabilities to the base station. The base station performs appropriate scheduling and transmission or reception management with respect to the corresponding terminal at a later time based on the UE capabilities received from the terminal.

[0405] About CA / DC

[0406] Fig.10 The radio protocol structures of the base station and the terminal in single cell, carrier aggregation and dual connectivity scenarios are shown.

[0407] refer to Fig.10 The radio protocol architecture of the next-generation mobile communication system includes NR Service Data Adaptation Protocol (SDAP) S25 and S70, NR Packet Data Convergence Protocol (PDCP) S30 and S65, NR Radio Link Control (RLC) S35 and S60, and NR MAC S40 and S55 in the terminal and NR base station respectively.

[0408] The functions of NR SDAP S25 and S70 may include at least some of the following functions.

[0409] - User data transfer function (transmission of user plane data)

[0410] - Mapping of UL and DL QoS flows and data bearers (mapping between DL and UL QoS flows and DRBs)

[0411] -Mark QoS flow ID in UL and DL (mark QoS flow ID in both DL packets and UL packets)

[0412] - Mapping of Reflective QoS Flows to Data Bearers for UL SDAP PDUs (Reflective QoS Flow to DRB Mapping for UL SDAP PDUs)

[0413] For SDAP layer devices, for each PDCP layer device, for each bearer or for each logical channel, whether the terminal uses the header of the SDAP layer device or whether to use the function of the SDAP layer device can be configured via an RRC message. When the SDAP header is configured, the base station can use the 1-bit NAS reflective QoS configuration indicator and the 1-bit AS reflective QoS configuration indicator of the SDAP header to instruct the terminal to update or reconfigure the mapping information of the data bearer and QoS flow of UL and DL. The SDAP header may include QoS flow ID information indicating QoS. QoS information can be used as data processing priority information, scheduling information, etc. to support smooth service.

[0414] Main functions of NR PDCP S30 and S65 may include at least some of the following functions.

[0415] -Header compression and decompression (ROHC only)

[0416] - User data transmission (transmission of user data)

[0417] - In-order delivery (sequential delivery of upper layer PDUs);

[0418] - Non-sequential delivery (out-of-sequence delivery of upper layer PDUs)

[0419] - Reordering (PDCP PDU reordering for reception)

[0420] - Duplicate detection (duplicate detection of lower layer SDU)

[0421] -Retransmission (retransmission of PDCP SDU)

[0422] -Encryption and decryption functions (cipher and decryption)

[0423] - Timer-based SDU discard (Timer-based SDU discard in UL)

[0424] The reordering function of the NR PDCP device refers to reordering the PDCP PDUs received at the lower layer in sequence based on the PDCP sequence number (SN), and may include transmitting the data to the upper layer according to the reordered sequence. Alternatively, the reordering function of the NR PDCP device may include directly transmitting without considering the sequence, including reordering the sequence to record the lost PDCP PDU, including reporting the status of the lost PDCP PDU to the transmitting side, and including requesting retransmission of the lost PDCP PDU.

[0425] The main functions of NR RLC S35 and S60 may include at least some of the following functions.

[0426] -Data transmission (transmission of upper layer PDU)

[0427] - In-order delivery (sequential delivery of upper layer PDUs);

[0428] - Non-sequential delivery (out-of-sequence delivery of upper layer PDUs)

[0429] -ARQ (error correction through ARQ)

[0430] - Concatenation, segmentation and reassembly (concatenation, segmentation and reassembly of RLC SDU)

[0431] - Re-segmentation (resegmentation of RLC data PDU)

[0432] - Reordering (reordering of RLC data PDUs)

[0433] - Duplicate detection

[0434] - Error detection (protocol error detection)

[0435] -RLC SDU discarded

[0436] -RLC reconstruction

[0437] The in-sequence delivery function of the NR RLC device may refer to transmitting RLC SDUs received from the lower layer to the upper layer in sequence. The in-sequence delivery function of the NR RLC device may include reassembling and transmitting the received RLC SDU when one RLC SDU is initially divided into multiple RLC SDUs and then received, including reordering the received RLC SDU according to the RLC SN or SN, including reordering the sequence and recording the lost RLC PDU, including reporting the status of the lost RLC PDU to the transmitting side, and including requesting retransmission of the lost RLC PDU.

[0438] The in-sequence delivery of the NR RLC device may include, when there is a lost RLC SDU, delivering only the RLC SDU preceding the lost RLC SDU in sequence to the upper layer, or including, if a predetermined timer expires, even if there is a lost RLC SDU, delivering the RLC SDU received before the timer is started in sequence to the upper layer. Alternatively, the in-sequence delivery function of the NR RLC device may include, if a predetermined timer expires, delivering all currently received RLC SDUs in sequence to the upper layer even if there is a lost RLC SDU. In the above, the RLC PDUs may be processed in the order in which they are received (in the order of arrival, regardless of the sequence number or the order of the sequence number) so as to be delivered to the PDCP device regardless of the sequence (out-of-sequence delivery). Fragments stored in a buffer or received later may be received, reconfigured into a complete RLC PDU, processed, and then delivered to the PDCP device. The NR RLC layer may not include a cascading function, and the cascading function may be performed in the NR MAC layer or may be replaced by a multiplexing function of the NR MAC layer.

[0439] Out-of-sequence delivery of the NR RLC device means delivering the RLC SDU received from the lower layer directly to the upper layer regardless of the sequence, and may include when one RLC SDU is initially segmented into multiple RLC SDUs and then received, reassembling the segmented RLC SDUs and then delivering them, and including storing the RLC SN or PDCP SN of the received RLC PDU and arranging the RLCSN or PDCP SN to record the lost RLC PDU.

[0440] NR MAC S40 and S55 can be connected to a plurality of NR RLC layer devices included in one terminal, and the main functions of NR MAC may include at least some of the following functions.

[0441] - Mapping (mapping between logical channels and transport channels)

[0442] -Multiplexing and demultiplexing (multiplexing / demultiplexing of MAC SDU)

[0443] -Dispatch information report

[0444] -HARQ (error correction via HARQ)

[0445] - Priority handling between logical channels (priority handling between logical channels of a UE)

[0446] - Priority handling between terminals (priority handling between UEs with the help of dynamic scheduling)

[0447] -MBMS service logo

[0448] -Transmission format selection

[0449] -filling

[0450] The NR PHY layers S45 and S50 may perform channel coding and modulation of high-layer data, form the channel-coded and modulated high-layer data into OFDM symbols and transmit the OFDM symbols via a radio channel, or may demodulate and channel-decode OFDM symbols received via a radio channel and transmit them to a high-layer.

[0451] The detailed structure of the radio protocol structure may be changed differently according to the carrier (or cell) operation method. For example, when the base station transmits data to the terminal based on a single carrier (or cell), the base station and the terminal use a protocol structure with a single structure per layer, such as Fig.10 As shown in S00 in . However, when the base station transmits data to the terminal based on carrier aggregation (CA) using multiple carriers in a single TRP, the base station and the terminal use a protocol structure in which everything up to RLC has a single structure but the PHY layer is multiplexed via the MAC layer, as shown in S10. As another example, when the base station transmits data to the terminal based on dual connectivity (DC) using multiple carriers in multiple TRPs, the base station and the terminal use a protocol structure in which everything up to RLC has a single structure but the PHY layer is multiplexed via the MAC layer, as shown in S20.

[0452] Non-coherent joint transmission (NC-JT)

[0453] NC-JT can be used for the terminal to receive PDSCH from multiple TRPs.

[0454] Unlike conventional systems, 5G wireless communication systems can support not only services that require high transmission rates, but also services with extremely short transmission delays and services that require high connection density. In a wireless communication network including multiple cells, TRPs or beams, cooperative communication (coordinated transmission) between corresponding cells, TRPs and / or beams can meet various service requirements by enhancing the strength of the signal received by the terminal or effectively performing interference control between corresponding cells, TRPs and / or beams.

[0455] Joint transmission (JT) is a representative transmission technology for the above-mentioned cooperative communication, and is a scheme for increasing the strength or throughput of the signal received by the terminal by transmitting a signal to a terminal via multiple different cells, TRPs and / or beams. In this case, the channel between the terminal and the corresponding cell, TRP and / or beam may have significantly different characteristics, and NC-JT supporting non-coherent interfering coding between the corresponding cells, TRPs and / or beams may require separate precoding, modulation and coding scheme (MCS), resource allocation, TCI indication, etc. according to the channel characteristics of each link between the terminal and the corresponding cell, TRP and / or beam.

[0456] The above-mentioned NC-JT transmission can be applied to at least one of PDSCH, PDCCH, PUSCH or PUCCH. During PDSCH transmission, transmission information such as precoding, MCS, resource allocation and TCI is indicated via DL DCI, and for NC-JT transmission, the transmission information should be indicated independently for each cell, TRP and / or beam. This is important for increasing the payload required for DL ​​DCI transmission, which may adversely affect the reception performance of the PDCCH that transmits DCI. Therefore, in order to support JT of PDSCH, it is necessary to carefully design the trade-off between the amount of DCI information and the control information reception performance.

[0457] Fig.11 Antenna port configuration and resource allocation for PDSCH allocation using cooperative communication in a wireless communication system according to an embodiment are presented.

[0458] refer to Fig.11 , describes an example of PDSCH transmission for each JT scheme, and shows an example of radio resource allocation for each TRP.

[0459] refer to Fig.11 , an example 1100 of coherent JT (C-JT) supporting interferometric coding between corresponding cells, TRPs, and / or beams is shown.

[0460] For C-JT, TRP A 1105 and TRP B 1110 transmit a single data (PDSCH) to the terminal 1115, and joint precoding may be performed in multiple TRPs. This may indicate that DMRS is transmitted through the same DMRS port so that TRP A 1105 and TRP B 1110 transmit the same PDSCH. For example, TRP A 1105 and TRP B 1110 may transmit DRMS ​​to the terminal through DMRS port A and DMRS B, respectively. In this case, the terminal may receive a piece of DCI information for receiving a PDSCH demodulated based on DMRS transmitted through DMRS port A and DMRS B.

[0461] Fig.11 An example 1120 of NC-JT supporting non-coherent intercoding between corresponding cells, TRPs, and / or beams for PDSCH transmission is shown.

[0462] For NC-JT, PDSCH is transmitted to terminal 1135 for each cell, TRP or / and beam, and separate precoding can be applied to each PDSCH. The corresponding cell, TRP and / or beam transmits different PDSCH layers or different PDSCHs to the terminal, thereby improving throughput compared with single-cell, single-TRP and / or single-beam transmission. In addition, the corresponding cell, TRP and / or beam repeatedly transmits the same PDSCH to the terminal, thereby improving reliability compared with single-cell, single-TRP and / or single-beam transmission. For ease of description, cells, TRPs and / or beams are collectively referred to as TRPs hereinafter.

[0463] In this case, various radio resource allocations can be considered, such as a case 1140 where the frequency and time resources used in multiple TRPs for PDSCH transmission are the same, a case 1145 where the frequency and time resources used in multiple TRPs do not overlap, and a case 1150 where some frequency and time resources used in multiple TRPs overlap.

[0464] For NC-JT support, various types, structures, and relationships of DCI may be considered to simultaneously assign multiple PDSCHs to a single terminal.

[0465] Fig.12 The configuration of DCI of NC-JT of different PDSCHs or different PDSCH layers transmitted by the corresponding TRP to the terminal in a wireless communication system according to an embodiment is demonstrated.

[0466] refer to Fig.12, case #1 1200 is an example of when different (N-1) PDSCHs are transmitted from (N-1) additional TRPs (TRP#1 to TRP#(N-1)) in addition to the serving TRP (TRP#0) used during a single PDSCH transmission, the control information of the PDSCH transmitted from the additional (N-1) TRPs is transmitted independently of the control information of the PDSCH transmitted from the serving TRP. That is, the terminal can obtain the control information of the PDSCH transmitted from different TRPs (TRP#0 to TRP#(N-1)) via multiple independent DCIs (DCI#0 to DCI#(N-1)). The formats of the multiple independent DCIs may be the same or different from each other, and the payloads of the DCIs may also be the same or different from each other. In the above case #1, the control or allocation freedom of each PDSCH can be fully guaranteed, but if the corresponding multiple DCIs are transmitted from different TRPs, the coverage of each DCI may differ, and thus the reception performance may be reduced.

[0467] Case #2 1205 shows an example of control information that depends on PDSCH, where when (N-1) different PDSCHs are transmitted from (N-1) additional TRPs (TRP#1 to TRP#(N-1)) in addition to the serving TRP (TRP#0) used during a single PDSCH transmission, control information (DCI) for each of the PDSCHs of the additional (N-1) TRPs is transmitted, and each DCI is transmitted from the serving TRP.

[0468] For example, DCI#0, which is control information for the PDSCH transmitted from the serving TRP (TRP#0), includes all information elements of DCI format 1_0, DCI format 1_1, and DCI format 1_2, but shortened DCI (hereinafter sDCI) (sDCI#0 to sDCI#(N-2)), which is control information for the PDSCH transmitted from the collaborative TRP (TRP#1 to TRP#(N-1)), may include only some information elements of DCI format 1_0, DCI format 1_1, and DCI format 1_2. Therefore, for sDCI for transmitting control information for the PDSCH transmitted from the collaborative TRP, the payload is smaller than that of normal DCI (nDCI) for transmitting control information related to the PDSCH transmitted from the serving TRP. Therefore, reserved bits may be included compared to nDCI.

[0469] In the above case #2 1205, each PDSCH control or allocation freedom may be limited according to the content of the information elements included in the sDCI, but since the reception performance of sDCI is better than that of nDCI, the probability of differences in the coverage of each DCI can be reduced.

[0470] Case #3 1210 shows an example of control information that depends on PDSCH, where when (N-1) different PDSCHs are transmitted from (N-1) additional TRPs (TRP#1 to TRP#(N-1)) in addition to the serving TRP (TRP#0) used during a single PDSCH transmission, one piece of control information for the PDSCHs of the (N-1) additional TRPs is transmitted, and DCI is transmitted from the serving TRP.

[0471] For example, DCI#0, which is the control information of the PDSCH transmitted from the serving TRP (TRP#0), may include all information elements of DCI format 1_0, DCI format 1_1, and DCI format 1_2. In the control information of the PDSCH transmitted from the collaborative TRP (TRP#1 to TRP#(N-1)), only some information elements of DCI format 1_0, DCI format 1_1, and DCI format 1_2 may be transmitted together in one auxiliary DCI (sDCI). For example, the sDCI may include at least one HARQ-related information, such as frequency domain resource allocation, time domain resource allocation, and MCS of the collaborative TRP. Information not included in the sDCI (such as a BWP indicator or a carrier indicator) may be based on the DCI of the serving TRP (DCI#0, normal DCI, or nDCI).

[0472] In case #3 1210 , each PDSCH control or allocation freedom may be restricted depending on the content of the information element included in the sDCI, but the sDCI reception performance may be adjustable and the complexity of the DCI blind decoding of the terminal may be reduced compared to case #1 1200 or case #2 1205 .

[0473] Case #4 1215 is an example of when (N-1) different PDSCHs are transmitted from N-1 additional TRPs (TRP#1 to TRP#(N-1)) in addition to the serving TRP (TRP#0) used during a single PDSCH transmission, control information of the PDSCHs transmitted from the (N-1) additional TRPs is transmitted in the same DCI (long DCI) as the control information of the PDSCHs transmitted from the serving TRP. That is, the terminal can obtain control information of the PDSCHs transmitted from different TRPs (TRP#0 to TRP#(N-1)) via a single DCI. For case #4 1215, the complexity of the DCI blind decoding of the terminal may not increase, but the PDSCH control or allocation freedom may be lower, so that the number of collaborative TRPs is limited according to the long DCI payload limitation.

[0474] Herein, sDCI may refer to various auxiliary DCIs, such as shortened DCI, auxiliary DCI and / or normal DCI including PDSCH control information transmitted from a coordinated TRP (the above-mentioned DCI formats 1_0 to 1_1), and unless special restrictions are specified, the description applies similarly to various auxiliary DCIs.

[0475] The above-mentioned case #1 1200, case #2 1205, and case #3 1210 in which one or more DCIs (PDCCHs) are used for NC-JT support are classified as NC-JT based on multiple PDCCHs, and the above-mentioned case #4 1215 in which a single DCI (PDCCH) is used for NC-JT support is classified as NC-JT based on single PDCCH. In multi-PDCCH based PDSCH transmission, a CORESET in which a DCI for a service TRP (TRP#0) is scheduled and a CORESET in which a DCI for a collaborative TRP (TRP#1 to TRP#(N-1)) is scheduled can be distinguished. As a method for distinguishing CORESETs, there may be a method of distinguishing via a high-layer indicator of each CORESET, a method of distinguishing via a beam configuration of each CORESET, and the like. In NC-JT based on a single PDCCH, a single DCI is used to schedule a single PDSCH having multiple layers instead of scheduling multiple PDSCHs, and the above-mentioned multiple layers can be transmitted from multiple TRPs. In this case, the connection relationship between the layer and the TRP used to transmit the layer can be indicated via the TCI indication of the layer.

[0476] In this document, "collaborative TRP" may be replaced with various terms such as "collaborative panel" or "collaborative beam" when applicable.

[0477] In this document, "when NC-JT is applied" can be interpreted in various ways depending on the situation, such as "when the terminal receives one or more PDSCHs simultaneously in one BWP", "when the terminal receives PDSCH based on two or more TCIs simultaneously in one BWP", "when the PDSCH received by the terminal is associated with one or more DMRS port groups", etc., but one expression is used for ease of description.

[0478] In this paper, the radio protocol structure of NC-JT can be used in various ways according to the TRP deployment scenario. For example, if there is no backhaul delay or the backhaul delay between the cooperating TRPs is very small, it is possible to use a radio protocol structure similar to Fig.10However, if the backhaul delay between the cooperative TRPs is so large that the backhaul delay cannot be ignored (for example, when the exchange of information such as CSI, scheduling, and HARQ-ACK between the cooperative TRPs takes 2ms or more), it may be possible to implement the method using a structure based on MAC layer multiplexing (a CA-like method) in a manner similar to S10. Fig.10 The S20 method implements a method (DC-like method) that uses an independent structure for each TRP starting from the RLC layer to ensure robustness to delays.

[0479] A terminal supporting C-JT / NC-JT can receive C-JT / NC-JT related parameters, setting values, etc. from high-level configuration, and can set the RRC parameters of the terminal based on the C-JT / NC-JT related parameters or setting values. For high-level configuration, the terminal can use the UE capability parameter, i.e., tci-StatePDSCH. The UE capability parameter (e.g., tci-StatePDSCH) can define the TCI state for PDSCH transmission. In FR1, the number of TCI states can be configured as 4, 8, 16, 32, 64, and 128 and in FR2 as 64 and 128, and in the configured number, a maximum of 8 states that can be indicated by 3 bits of the TCI field in the DCI can be configured via a MAC CE message. The maximum value of 128 refers to the value indicated by the maxNumberConfiguredTCIstatesPerCC in the parameter tci-StatePDSCH included in the terminal's capability signaling. In this way, a series of configuration processes from high-level configuration to MAC CE configuration can be applied to the beamforming change command or beamforming indication of at least one PDSCH in a TRP.

[0480] Multi-TRP based on multi-DCI

[0481] In the multi-TRP transmission method based on multi-DCI, the DL control channel for NC-JT transmission can be configured based on multi-PDCCH.

[0482] In multi-PDCCH based NC-JT, when transmitting DCI for PDSCH scheduling of each TRP, a CORESET or search space distinguished for each TRP may be provided. The CORESET or search space of each TRP may be configured as at least one of the following cases.

[0483] High-level index configuration for each CORESET: The CORESET configuration information configured via high-level configuration may include an index value, and the TRP used for PDCCH transmission in the corresponding CORESET may be distinguished by the configured index value of each CORESET. That is, in a set of CORESETs with the same high-level index value, the same TRP may be considered to transmit a PDCCH, or to transmit a PDCCH for scheduling a PDSCH of the same TRP. The above index for each CORESET may be named CORESETPoolIndex, and for a CORESET that has been configured with the same CORESETPoolIndex value, the PDCCH may be considered to be transmitted from the same TRP. For a CORESET that has not yet configured a CORESETPoolIndex value, it may be considered that a default value for CORESETPoolIndex has been configured, where the default value is 0.

[0484] In this article, when each of multiple CORESETs has more than one type of CORESETPoolIndex, that is, when each CORESET has a different CORESETPoolIndex, multiple CORESETs are included in the PDCCH-Config as high-level signaling, and the terminal can assume that the base station can use a multi-TRP transmission method based on multi-DCI.

[0485] However, if each of the multiple CORESETs has a type of CORESETPoolIndex, the multiple CORSETs are included in the PDCCH-Config as high-level signaling, that is, if all CORESETs have the same CORESETPoolIndex of 0 or 1, the terminal can consider that the base station uses a single TRP for transmission instead of a multi-TRP transmission method based on multi-DCI.

[0486] Multiple PDCCH-Config configurations: Multiple PDCCH-Configs can be configured in one BWP, and each PDCCH-Config can include the PDCCH configuration for each TRP. That is, the CORESET list for each TRP and / or the search space list for each TRP can be configured in one PDCCH-Config, and one or more CORESETs and one or more search spaces included in one PDCCH-Config can be considered to correspond to a specific TRP.

[0487] CORESET beam / beam group configuration: The TRP corresponding to the corresponding CORESET can be distinguished via the beam or beam group configured for each CORESET. For example, if the same TCI state is configured in multiple CORESETs, it can be considered that the CORESET is transmitted via the same TRP, or the PDCCH for scheduling the PDSCH of the same TRP is transmitted in the corresponding CORESET.

[0488] Search space beam / beam group configuration: A beam or beam group can be configured for each search space, and the TRP used for each search space can be distinguished based on the configured beam or beam group. For example, when the same beam / beam group or TCI state is configured in multiple search spaces, it can be considered that the same TRP transmits a PDCCH in the corresponding search space, or that a PDCCH for scheduling a PDSCH of the same TRP is transmitted in the corresponding search space.

[0489] By distinguishing the CORESET or search space of each TRP, the HARQ-ACK codebook can be generated independently and the PUCCH resources can be used independently for each TRP.

[0490] The configuration may be independent for each cell or each BWP. For example, when two different CORESETPoolIndex values ​​are configured for the PCell, the CORESETPoolIndex value may not be configured for a particular SCell. In this case, it may be considered that NC-JT transmission is configured for the PCell, while NC-JT transmission is not configured for the SCell in which the CORESETPoolIndex value is not configured.

[0491] The PDSCH TCI state activation / deactivation MAC-CE applicable to the multi-TRP transmission method based on multi-DCI can follow Figure 7. If the terminal is not configured with CORESETPoolIndex for each of all CORESETs in the high-layer signaling PDCCH-Config, the terminal may ignore the CORESET pool ID field 755 in the corresponding MAC-CE 750. If the terminal is capable of supporting a multi-TRP transmission method based on multiple DCIs, that is, if the terminal has different CORESETPoolIndex for each of its CORESETs in the high-layer signaling of PDCCH-Config, the terminal may activate the TCI state in the DCI included in the PDCCH transmitted from the CORESET having the same CORESETPoolIndex value as the CORESETPool ID field 755 value in the MAC-CE 750. For example, if the value of the CORESET pool ID field 755 in the MAC-CE 750 is 0, the TCI state in the DCI included in the PDCCH transmitted from the CORESET having the CORESETPoolIndex value of 0 may comply with the activation information of the MAC-CE.

[0492] If the terminal is configured to use a multi-DCI-based multi-TRP transmission method from a base station, that is, if each of the multiple CORESETs included in the high-level signaling PDCCH-Config has more than one type of CORESETPoolIndex, or if each CORESET has a different CORESETPoolIndex, the terminal can recognize that there are the following restrictions on PDSCH scheduled by PDCCH in corresponding CORESETs with two different CORESETPoolIndex values.

[0493] 1) If the PDSCHs indicated by the PDCCHs in the corresponding CORESETs with two different CORESETPoolIndex values ​​overlap completely or partially, the terminal may apply the TCI states indicated by the respective PDCCHs to different CDM groups, respectively. That is, two or more TCI states may not be applied to one CDM group.

[0494] 2) If the PDSCHs indicated by the PDCCHs in corresponding CORESETs with two different CORESETPoolIndex values ​​overlap completely or partially, the terminal may expect that the actual number of frontloaded DMRS symbols, the actual number of additional DMRS symbols, the actual positions of the DMRS symbols and the DMRS types of each PDSCH may not be different from each other.

[0495] 3) The terminal may expect that the BWP indicated by the PDCCH in the corresponding CORESETs with two different CORESETPoolIndex values ​​is the same, and their subcarrier spacing may also be the same.

[0496] 4) The terminal may expect that each PDCCH fully includes information about the PDSCH scheduled from the PDCCH in the corresponding CORESET with two different CORESETPoolIndex values.

[0497] Multiple TRPs based on a single DCI

[0498] In the multi-TRP transmission method based on a single DCI, the DL control channel for NC-JT transmission can be configured based on a single PDCCH.

[0499] In a multi-TRP transmission method based on a single DCI, a PDSCH transmitted by multiple TRPs can be scheduled via a DCI. In this case, the number of TCI states can be used to indicate the number of TRPs that transmit the corresponding PDSCH. That is, if the number of TCI states indicated in the DCI for PDSCH scheduling is two, NC-JT transmission based on a single PDCCH can be considered or identified, and if the number of TCI states is one, a single TRP transmission can be considered or identified. The TCI state indicated by the DCI may correspond to one or two TCI states in the TCI state activated via MAC-CE. If the TCI state of the DCI corresponds to two TCI states activated via MAC-CE, a correspondence between the TCI code point indicated in the DCI and the TCI state activated via MAC-CE is established, and there may be two TCI states corresponding to the TCI code point activated via MAC-CE.

[0500] In the case where at least one code point among all code points of the TCI state field in the DCI indicates two TCI states, the terminal may assume that the base station may perform transmission based on a multi-TRP method based on a single DCI. In this case, at least one code point indicating two TCI states in the TCI state field may be activated via an enhanced PDSCH TCI state activation / deactivation MAC-CE.

[0501] Fig.13 The enhanced PDSCH TCI state activation / deactivation MAC-CE structure is shown. For example, the meaning of each field in the MAC CE and the value that can be configured for each field are shown in Table 39 below.

[0502] Table 39

[0503]

[0504]

[0505] exist Fig.13 If C 0 If the value of field 1305 is 1, the corresponding MAC-CE has TCI status ID 0,1 Field 1310 may also include a TCI status ID 0,2 Field 1315. This may be referenced so that the TCI Status ID is activated for the zeroth codepoint of the TCI Status field included in the DCI 0,1 and TCI Status ID 0,2 If the base station indicates the code point to the terminal, two TCI states can be indicated to the terminal. 0 If the value of field 1305 is 0, the MAC-CE may not include the TCI status ID. 0,2 Field 1315, and this indicates the activation of the zeroth code point with the TCI state ID for the TCI state field included in the DCI 0,1 A corresponding TCI state.

[0506] The configuration may be independent for each cell or each BWP. For example, a PCell may have up to two activated TCI states corresponding to one TCI code point, and a specific SCell may have up to one activated TCI state corresponding to one TCI code point. In this case, it may be considered or recognized that NC-JT transmission is configured for the PCell, while NC-JT transmission is not configured for the above SCell.

[0507] Method for distinguishing multiple TRP repeated PDSCH transmission schemes (TDM / FDM / SDM) based on single DCI

[0508] Next, a method for distinguishing a multi-TRP repetition PDSCH transmission scheme based on a single DCI is described. According to the high-level signaling configuration from the base station and the value indicated via the DCI field, the terminal can be indicated with different multi-TRP repetition PDSCH transmission schemes based on a single DCI (e.g., TDM, FDM, and SDM). Table 40 below shows a method for distinguishing a single TRP-based scheme and a multi-TRP-based scheme indicated to the terminal according to the value of a specific DCI field and a high-level signaling configuration.

[0509] Table 40

[0510]

[0511]

[0512] In Table 40, each column can be described as follows.

[0513] - Number of TCI states (column 2): This refers to the number of TCI states indicated by the TCI state field in the DCI, and the number of TCI states can be one or two.

[0514] - Number of CDM groups (3rd column): This refers to the number of different CDM groups for the DMRS ports indicated by the Antenna Ports field in the DCI. The number of CDM groups can be 1, 2 or 3.

[0515] - repetitionNumber configuration and indication conditions (column 4): There may be three conditions depending on whether repetitionNumber is configured for all time domain resource allocation (TDRA) entries that may be indicated by the time domain resource allocation field in the DCI and whether the actually indicated TDRA entry has the configuration of repetitionNumber.

[0516] Condition 1: At least one of all TDRA entries that may be indicated by the time domain resource allocation field includes a configuration of repetitionNumber, and the TDRA entry indicated by the time domain resource allocation field in the DCI includes a configuration of repetitionNumber greater than 1.

[0517] Condition 2: At least one of all TDRA entries that may be indicated by the time domain resource allocation field includes a configuration of repetitionNumber, and the TDRA entry indicated by the time domain resource allocation field in the DCI does not include a configuration of repetitionNumber.

[0518] Condition 3: All TDRA entries indicated by the time domain resource allocation field do not include the configuration of repetitionNumber.

[0519] - Regarding configuration of repetitionScheme (5th column): repetitionScheme indicates whether repetitionScheme as higher layer signaling is configured. One of "tdmSchemeA", "fdmSchemeA" and "fdmSchemeB" can be configured for repetitionScheme as higher layer signaling.

[0520] - Transmission scheme indicated to the terminal (column 6): This can refer to a single TRP or multi-TRP scheme indicated according to each combination (column 1) as expressed in Table 42 above.

[0521] Single TRP: Single TRP refers to PDSCH transmission based on a single TRP. If the terminal is configured with pdsch-AggegationFactor in the high-level signaling PDSCH-config, the terminal can be scheduled to perform repeated PDSCH transmissions based on a single TRP as many times as configured. Otherwise, the terminal can be scheduled to perform a single PDSCH transmission based on a single TRP.

[0522] Single TRP time division multiplexing (TDM) scheme B: This refers to repeated PDSCH transmissions based on a single TRP-based time resource division between time slots. According to condition 1 related to repetitionNumber, the terminal repeatedly transmits PDSCH on the time resource as many times as the repetitionNumber of the time slot, which is greater than 1 and configured in the TDRA entry indicated by the time domain resource allocation field. In this case, the same starting symbol and symbol length of the PDSCH indicated by the TDRA entry are applied to each time slot as many times as the repetitionNumber, and the same TCI state is applied to each repeated PDSCH transmission. In view of the repeated PDSCH transmission between time slots on the time resource, this scheme is similar to the time slot aggregation scheme, but unlike time slot aggregation, it can be dynamically determined whether to indicate repeated transmission based on the time domain resource allocation field in the DCI.

[0523] Multi-TRP SDM: This refers to a PDSCH transmission scheme based on multi-TRP-based spatial resource division. Multi-TRP SDM is a method of receiving from each TRP by dividing the layers, and although it is not a repeated transmission scheme, Multi-TRP SDM achieves transmission at a low coding rate by increasing the number of layers in order to improve the reliability of PDSCH transmission. The terminal can receive PDSCH by respectively applying the two TCI states indicated by the TCI status field in the DCI to the two CDM groups indicated by the base station.

[0524] Multi-TRP FDM Scheme A: This refers to a PDSCH transmission scheme based on frequency resource division based on multi-TRP, and although it is not used for repeated transmission like multi-TRP SDM in view of having one PDSCH transmission opportunity, the multi-TRP FDM scheme A is a scheme for achieving transmission with high reliability at a low coding rate by increasing the amount of frequency resources. In the multi-TRP FDM scheme A, two TCI states indicated by the TCI state field in the DCI can be applied to frequency resources that do not overlap with each other, respectively. In the case where the PRB bundling size is determined to be wideband, if the number of RBs indicated by the frequency domain resource allocation (FDRA) field is N, the terminal can receive the first ceil (N / 2) RBs by applying the first TCI state and the remaining floor (N / 2) RBs by applying the second TCI state. Ceil (.) and floor (.) are operators for rounding or flooring a decimal point. If the PRB bundling size is determined to be 2 or 4, even PRGs can be received by applying the first TCI state, and odd PRGs can be received by applying the second TCI state.

[0525] Multi-TRP FDM Scheme B: This refers to a repeated PDSCH transmission scheme based on multi-TRP-based frequency resource division, wherein when there are two PDSCH transmission opportunities, the multi-TRP FDM scheme B can implement repeated PDSCH transmission at each opportunity. In the multi-TRP FDM scheme B, as in the multi-TRP-FDM scheme A, the two TCI states indicated by the TCI state field in the DCI can be respectively applied to frequency resources that do not overlap with each other. If the PRB bundling size is determined to be wideband, when the number of RBs indicated by the FDRA field is N, the terminal receives the first ceil(N / 2) RBs by applying the first TCI state, and receives the remaining floor(N / 2) RBs by applying the second TCI state. Ceil(.) and floor(.) are operators for rounding or flooring a decimal point. If the PRB bundling size is determined to be 2 or 4, even PRGs are received by applying the first TCI state, and odd PRGs are received by applying the second TCI state.

[0526] Multi-TRP TDM scheme A: This refers to a repeated PDSCH transmission scheme in a time slot divided based on time resources of multiple TRPs. The terminal has two PDSCH transmission opportunities in one time slot, and can determine the first reception opportunity based on the starting symbol and symbol length of the PDSCH indicated via the time domain resource allocation field in the DCI. The starting symbol of the second reception opportunity of the PDSCH can be a position where a symbol offset as much as StartingSymbolOffsetK as high-level signaling is applied from the last symbol of the first transmission opportunity, and the transmission opportunity can be determined according to the symbol length indicated thereby. If StartingSymbolOffsetK as high-level signaling is not configured, the symbol offset can be regarded as 0.

[0527] Multi-TRP TDM Scheme B: This refers to a repeated PDSCH transmission scheme between time slots based on multi-TRP time resource division. The terminal has one PDSCH transmission opportunity in one time slot, and can receive repeated transmissions based on the same starting symbol and symbol length of PDSCH during the repetitionNumber number of time slots indicated by the time domain resource allocation field in the DCI. If the repetitionNumber is 2, the terminal can receive the PDSCH by applying the first TCI state and the second TCI state, respectively, with respect to the repeated PDSCH transmissions in the first time slot and the second time slot. If the repetitionNumber is greater than 2, the terminal can use different TCI state application schemes according to the configuration of tciMapping as high-layer signaling. If tciMapping is configured as cycloMapping, the first and second TCI states are applied to the first PDSCH transmission opportunity and the second PDSCH transmission opportunity, respectively, and the TCI state application method is also applied to the remaining PDSCH transmission opportunities. If tciMapping is configured as sequentialMapping, the first TCI state is applied to the first PDSCH transmission timing and the second PDSCH transmission timing, and the second TCI state is applied to the third PDSCH transmission timing and the fourth PDSCH transmission timing, wherein the TCI state application method is applied to the remaining PDSCH transmission timings in the same manner.

[0528] About Radio Link Monitoring Reference Signal (RLM RS)

[0529] For the higher layer signaling of each DL BWP of SPCell and the specific higher layer signaling structure shown in Table 41 below, the terminal may be configured with a set of RLM RSs from the base station via RadioLinkMonitoringRS in RadioLinkMonitoringConfig as the higher layer signaling.

[0530] Table 41

[0531]

[0532] Table 42 below can be used based on the maximum number of SSBs per half frame (L max ) to indicate the configurable or selectable number of RLM RSs for each specific use. As shown in Table 44 below, according to L max value, you can LR-RLM RSs are used for link recovery or radio link monitoring, and N LR-RLM N of RS RLM RS is used for radio link monitoring.

[0533] Table 42

[0534] As every half frame The maximum number of blocks L max The function of N LR-RLM and N RLM

[0535] <![CDATA[L max ]]> <![CDATA[N LR-RLM ]]> <![CDATA[N RLM ]]> 4 2 2 8 6 4 64 8 8

[0536] If the terminal is not configured with RadioLinkMonitoringRS as higher layer signaling, and the terminal is configured with a TCI state for receiving PDCCH in CORESET, and if at least one CSI-RS is included in the TCI state, the RLM RS may be selected according to the following RLM RS selection method.

[0537] RLM RS selection method 1): If the activated TCI state to be used for PDCCH reception has a reference RS (for example, an activated TCI state has only one of QCL Type A, B or C), the terminal can select the reference RS of the activated TCI state to be used for PDCCH signal reception as the RLM RS.

[0538] RLM RS selection method 2): If the activated TCI state to be used for PDCCH reception has two reference RSs (for example, one activated TCI state has one of QCL Type A, B or C and also has QCL-Type D), the terminal can select the reference RS of QCL-Type D as the RLM-RS. The terminal does not expect to configure two QCL-Type Ds in one activated TCI state.

[0539] RLM RS selection method 3): The terminal does not expect to select an aperiodic or semi-persistent RS as the RLM RS.

[0540] RLM RS selection method 4): If L max =4, the terminal can select N RLM RS (due to L max is 4, so two can be selected). Based on RLM RS selection methods 1 to 3, the RLM RS is selected from the reference RS of the TCI state configured in the CORESET for PDCCH reception, where the search space with a short period to which the CORESET is linked is determined to have a high priority, and the RLM RS is selected from the reference RS of the TCI state configured in the CORESET linked to the search space with the shortest period. If there are multiple CORESETs linked to multiple search spaces with the same period, the RLM RS is selected from the reference RS of the TCI state configured in the high CORESET index.

[0541] Fig.14 An embodiment of the RLM RS selection process is presented. Fig.14 CORESET#1 1405 to CORESET#3 1407 linked to search space set #1 1401 to search space set #4 1404 with different periods within an activated DL BWP, and reference RSs of TCI states configured in each CORESET are shown. Based on RLM RS selection method 4, RLM RS selection uses the TCI state configured in the CORESET linked to the search space with the shortest period, but since search space set #1 1401 and search space set #3 1403 have the same period, the reference RS of the TCI state configured in CORESET#2 having a higher index between CORESET#1 1405 and CORESET#2 1406 linked to the corresponding search space can be used as the reference RS with the highest priority in RLMRS selection.

[0542] In addition, since the TCI state configured in CORESET#2 has only QCL-TypeA and its reference RS is a periodic RS, PCSI-RS#2 1410 may be selected first as the RLM RS according to RLM RS selection methods 1 and 3. The reference RS of QCL-TypeD may be a candidate selected from the reference RS of the TCI state with subsequent priority configured in CORESET#1 according to RLM RS selection method 2, but the corresponding RS is a semi-persistent RS 1409 and is therefore not selected as the RLM RS according to RLM RS selection method 3. Therefore, the reference RS of the TCI state configured in CORESET#3 may be regarded as having subsequent priority, and the reference RS of QCL-TypeD may be a candidate selected according to RLM RS selection method 2, and since the reference RS is a periodic RS, PCSI-RS#4 1412 may be selected as the second RLM RS according to RLM RS selection method 3. Therefore, the finally selected RLM RS 1413 may be PCSI-RS#2 and PCSI-RS#4.

[0543] Single TCI state activation and indication method based on unified TCI scheme

[0544] The unified TCI scheme may refer to a scheme for integrating and managing a transmit / receive beam management scheme in existing Rel-15 and Rel-16, which is different from a spatial relationship information scheme used by a terminal in UL transmission and a TCI state scheme used in DL reception. Therefore, if the terminal receives a TCI state indication based on the unified TCI scheme from the base station, the TCI state may be used for beam management even for UL transmission.

[0545] If the terminal is configured with TCI-State (which is high-layer signaling) as high-layer signaling tci-stateId-r17 from the base station, the terminal can perform operations based on the unified TCI scheme by using the corresponding TCI-State. TCI-State can exist in two types: joint TCI state or separate TCI state.

[0546] The first type is a joint TCI state, and the base station can indicate the TCI-State to be applied to UL transmission and DL reception to the terminal via one TCI state. If the TCI-State based on the joint TCI state is indicated to the terminal, the parameters to be used for DL ​​channel estimation can be indicated to the terminal by using the RS corresponding to qcl-Type1 in the TCI-State based on the joint TCI state and the parameters to be used as the DL receive beam or receive filter can be indicated by using the RS corresponding to qcl-Type2. If the TCI-State based on the joint TCI state is indicated to the terminal, the parameters to be used as the UL transmit beam or transmit filter can be indicated to the terminal by using the RS corresponding to qcl-Type2 in the corresponding TCI-State based on the joint DL / UL TCI state. In this case, if the TCI-State based on the joint TCI state is indicated to the terminal, the terminal can apply the same beam to UL transmission and DL reception.

[0547] The second type is a separate TCI state, and the base station may indicate to the terminal the UL TCI-State to be applied to UL transmission and the DL TCI-State to be applied to DL reception. If the UL TCI state is indicated to the terminal, the parameters to be used as the UL transmit beam or transmit filter may be indicated to the terminal by using the reference RS or source RS configured in the UL TCI state. If the DL TCI state is indicated to the terminal, the parameters to be used for DL ​​channel estimation may be indicated to the terminal by using the RS corresponding to qcl-Type1 and the parameters to be used as the DL receive beam or receive filter may be indicated by using the RS corresponding to qcl-Type2, which are configured in the DL TCI state.

[0548] If both the DL TCI state and the UL TCI state are indicated to the terminal, the parameters to be used as the UL transmit beam or transmit filter can be indicated to the terminal by using the reference RS or source RS configured in the UL TCI state, and the parameters to be used for DL ​​channel estimation can be indicated by using the RS corresponding to qcl-Type1 and the parameters to be used as the DL receive beam or receive filter can be indicated by using the RS corresponding to qcl-Type2, which are configured in the DL TCI state. In this case, if the DL TCI state indicated to the terminal and the reference RS or source RS configured in the UL TCI state are different, the terminal can apply the UL transmit beam based on the indicated UL TCI state and apply the DL receive beam based on the DL TCI state.

[0549] For each specific BWP in a specific cell, a maximum of 128 joint TCI states can be configured by the base station to the terminal via high-layer signaling, and for each specific BWP in a specific cell, a maximum of 64 or 128 DL TCI states in a separate TCI state can be configured via high-layer signaling based on the UE capability report. The joint TCI state and the DLTCI state in the separate TCI state can use the same high-layer signaling structure. For example, if 128 joint TCI states are configured and 64 DL TCI states in the separate TCI state are configured, the 64 DL TCI states can be included in the 128 joint TCI states.

[0550] For each specific BWP in a specific cell, up to 32 or 64 UL TCI states in a separate TCI state can be configured via high-level signaling based on the UE capability report. Similar to the relationship between the joint TCI state and the DL TCI state in the separate TCI state, the same high-level signaling structure can also be used for the UL TCI state in the joint TCI state and the separate TCI. The UL TCI state in the separate TCI can use a different high-level signaling structure from the joint TCI state and the DL TCI state in the separate TCI state. As described above, the use of the same high-level signaling structure or the use of different high-level signaling structures can be defined in the standard. Based on the UE capability report including information on whether there are usage scenarios that the terminal can support in these two types, the use of different high-level signaling structures or the use of the same high-level signal structure can be distinguished via another high-level signaling configured by the base station.

[0551] The terminal can receive the transmit / receive beam related indication in the unified TCI scheme by using one of the joint TCI state and the separate TCI state configured by the base station. Whether to use one of the joint TCI state and the separate TCI state can be configured to the terminal by the base station via high-layer signaling.

[0552] The terminal can receive transmit / receive beam related indications by using a scheme selected from a joint TCI state and a separate TCI state via high-layer signaling, where the transmit / receive beam indication method from the base station can include two methods: a MAC-CE-based indication method and a MAC-CE-based activation and DCI-based indication method.

[0553] If the terminal is configured via high-layer signaling to receive transmit / receive beam-related indications by using a joint TCI state scheme, the terminal can receive a MAC-CE indicating a joint TCI state from the base station and perform a transmit / receive beam application operation, and the base station can schedule the terminal to receive a PDSCH including the MAC-CE via the PDCCH. If a joint TCI state is included in the MAC-CE, the terminal can transmit a PUCCH including HARQ-ACK information indicating whether the reception of the PDSCH including the MAC-CE is successful to the base station, and can determine the UL transmit beam or transmit filter and the DL receive beam or receive filter by using the indicated joint TCI state starting from 3ms after transmitting the PUCCH.

[0554] If two or more joint TCI states are included in the MAC-CE, the terminal may transmit a PUCCH including HARQ-ACK information indicating whether the reception of the PDSCH including the MAC-CE is successful to the base station, identify the corresponding code points of the TCI state field of the DCI format 1_1 or 1_2 corresponding to the multiple joint TCI states indicated by the MAC-CE from 3ms after the PUCCH is transmitted, and activate the joint TCI state indicated by the MAC-CE. Thereafter, the terminal may receive the DCI format 1_1 or 1_2 and apply one joint TCI state indicated by the TCI state field in the DCI to the UL transmit beam and the DL receive beam. In this case, the DCI format 1_1 or 1_2 may include DL data channel scheduling information with or without DL assignment.

[0555] If the terminal is configured via high-layer signaling to receive transmit / receive beam related indications by using a separate TCI state scheme, the terminal can receive a MAC-CE indicating a separate TCI state from the base station and perform a transmit / receive beam application operation, and the base station can schedule the PDSCH including the MAC-CE for the terminal via the PDCCH. If a separate TCI state set is included in the MAC-CE, the terminal can transmit a PUCCH including HARQ-ACK information indicating whether the reception of the PDSCH is successful to the base station. From 3ms after transmitting the PUCCH, the terminal can determine the UL transmit beam or transmit filter and the DL receive beam or receive filter by using the separate TCI state included in the indicated separate TCI state set. In this case, the separate TCI state set may refer to a single separate TCI state or multiple separate TCI states that a code point of the TCI state field in DCI format 1_1 or 1_2 may have, and a separate TCI state set may include a DL TCI state, a UL TCI state, or a DL TCI state and a UL TCI state. If two or more separate TCI state sets are included in the MAC-CE, the terminal may transmit a PUCCH including HARQ-ACK information indicating whether the reception of the PDSCH is successful to the base station, identify the corresponding code points of the TCI state field of the DCI format 1_1 or 1_2 corresponding to the multiple separate TCI state sets indicated by the MAC-CE from 3ms after the PUCCH is transmitted, and activate the indicated separate TCI state set. In this case, the corresponding code point of the TCI state field of the DCI format 1_1 or 1_2 may indicate one DL TCI state, one UL TCI state, or one DL TCI state and one UL TCI state. The terminal may receive the DCI format 1_1 or 1_2 and apply the separate TCI state set indicated by the TCI state field in the DCI to the UL transmit beam and the DL receive beam. In this case, the DCI format 1_1 or 1_2 may include DL data channel scheduling information with or without DL assignment.

[0556] For each of the joint TCI state scheme and the separate TCI state scheme, there may be a MAC-CE for activating or indicating the above-mentioned single joint TCI state and separate TCI state, and the TCI state may be activated or indicated by using one MAC CE based on one of the joint TCI state scheme or the separate TCI state scheme.

[0557] Fig.15 A MAC-CE structure for activation and indication of a joint TCI state in an embodiment of a wireless communication system is presented.

[0558] refer to Fig.15 , the S field 1500 may indicate the number of each joint TCI status information included in the MAC-CE. If the value of the S field 1500 is 1, the MAC-CE may indicate one joint TCI state and may have a length of at most only the second octet. If the value of the S field 1500 is 0, the MAC-CE may include two or more joint TCI status information, the corresponding joint TCI state may be activated at the corresponding code point of the TCI status field of the DCI format 1_1 or 1_2, and up to 8 joint TCI states may be activated. Configuring the value of the S field 1500 to 0 and 1 is not limited to the configuration method, where a value of 0 may indicate that one joint TCI state is included and a value of 1 may indicate that two or more joint TCI status information are included. This interpretation of the S field may also be applied to other embodiments of this document. Via TCI state ID 0 Field 1515 to TCI Status ID N-1 The TCI state indicated by field 1525 may correspond to the zeroth code point to the (N-1)th code point of the TCI state field of DCI format 1_1 or 1_2, respectively. The serving cell ID field 1505 may indicate a serving cell identifier (ID), and the BWP ID field 1510 may indicate a BWP ID. The R field may be a 1-bit reserved field that does not include indication information.

[0559] Fig.16 A MAC-CE structure for activation and indication of a joint TCI state in a wireless communication system according to an embodiment is shown.

[0560] refer to Fig.16 , the serving cell ID field 1605 may indicate the serving cell ID, and the BWP ID field 1610 may indicate the BWP ID. The R field 1600 may be a 1-bit reserved field that does not include indication information. Each field present in the second octet to the Nth octet is a bitmap indicating each joint TCI state configured via high-layer signaling. As an example, T 7 1615 may indicate whether the eighth joint TCI state configured via higher layer signaling is indicated. N The value is 1, which can be interpreted as indicating or activating the corresponding joint TCI state, and if T N If the value is 0, it can be understood that the corresponding joint TCSI state is not indicated or activated. The configuration values ​​0 and 1 are not limited to the above configuration method. Fig.16If there is a joint TCI state transmitted via the MAC-CE structure of the DCI format 1_1 or 1_2, the terminal can apply the joint TCI state indicated via the MAC-CE to the UL transmit beam and the DL receive beam. If there are two or more joint TCI states transmitted via the MAC-CE structure, the terminal can identify that the joint TCI state indicated via the MAC-CE corresponds to the corresponding code point of the TCI state field of the DCI format 1_1 or 1_2, and can activate the corresponding joint TCI state, and starting from the joint TCI state with the lowest index in the indicated joint TCI state, the joint TCI states corresponding to the code points with low indexes in the TCI state field of the DCI format 1_1 or 1_2 can be activated in sequence.

[0561] Fig.17 A MAC-CE structure for activation and indication of a joint TCI state in a wireless communication system according to an embodiment is shown.

[0562] refer to Fig.17 , the serving cell ID field 1705 may indicate a serving cell ID, and the BWP ID field 1710 may indicate a BWP ID.

[0563] The S field 1700 may indicate the number of pieces of joint TCI state information included in the MAC-CE. If the value of the S field 1700 is 1, the MAC-CE may indicate one joint TCI state and may include only up to the second octet and may be transmitted via the TCI state ID. 0 Field 1720 indicates the joint TCI state to the terminal. For example, if the value of S field 1700 is 0, the MAC-CE may include two or more pieces of joint TCI state information, the corresponding code point of the TCI state field of DCI format 1_1 or 1_2 may activate the corresponding joint TCI state, up to 8 joint TCI states may be activated, the second octet may not exist, and Fig.17 The first octet and the third octet to the (N+1)th octet may exist on the MAC-CE structure of . The corresponding field present in the third octet to the (N+1)th octet is a bitmap indicating the corresponding joint TCI state configured via higher layer signaling. For example, T 15 1725 may indicate whether the 16th joint TCI state configured via higher layer signaling is indicated. The R field 1715 may be a 1-bit reserved field that does not include indication information.

[0564] If there is a Fig.17 If a joint TCI state is transmitted via the MAC-CE structure, the terminal can apply the joint TCI state indicated via MAC-CE to the UL transmit beam and the DL receive beam. Fig.17If two or more joint TCI states are transmitted via the MAC-CE structure of the DCI format 1_1 or 1_2, the terminal can identify that the corresponding joint TCI state indicated via the MAC-CE corresponds to the corresponding code point of the TCI state field of the DCI format 1_1 or 1_2, and can activate the corresponding joint TCI state. Starting from the joint TCI state with the lowest index in the indicated joint TCI states, the joint TCI states corresponding to the code points with low indexes in the TCI state field of the DCI format 1_1 or 1_2 can be activated in sequence.

[0565] Fig.18 A MAC-CE structure for activation and indication of individual TCI states in a wireless communication system according to an embodiment is shown.

[0566] refer to Fig.18 , the serving cell ID field 1805 may indicate a serving cell ID, and the BWP ID field 1810 may indicate a BWP ID.

[0567] The S field 1800 may indicate the number of individual TCI state set information pieces included in the MAC-CE. If the value of the S field 1800 is 1, the MAC-CE may indicate one individual TCI state set and may include only up to the third octet. If the value of the S field 1800 is 0, the MAC-CE may include two or more individual TCI state set information pieces, and the corresponding code point of the TCI state field of the DCI format 1_1 or 1_2 may activate the corresponding individual TCI state set, and up to 8 individual TCI state sets may be activated. 0 Field 1815 may indicate which individual TCI states are included in the indicated individual TCI state set. 0 The value of the C TCI field, a value of "00" may indicate a reserved state, a value of "01" may indicate a DL TCI state, a value of "10" may indicate a UL TCI state, and a value of "11" may indicate a DL TCI state and a UL TCI state. However, this is only an example, and C 0 The interpretation of field 1815 is not limited thereto. TCI Status ID D,0 Field 1820 and TCI Status ID U,0 Field 1825 may respectively refer to the DL TCI state and the UL TCI state that may be included in the zeroth individual TCI state set for indication. 0 If the value of the field is "01", the TCI status ID D,0 Field 1820 may indicate the DL TCI state, and the TCI state ID U,0 Field 1825 may be ignored. If C 0 The field value is "10", then the TCI status IDD,0 Field 1820 may be ignored and the TCI Status ID U,0 Field 1825 may indicate the UL TCI status. 0 If the field value is "11", the TCI status ID D,0 Field 1820 may indicate the DLTCI status and TCI status ID U,0 Field 1825 may indicate the UL TCI status.

[0568] Fig.18 An example of MAC-CE when the UL TCI state in the individual TCI state uses the same higher layer signaling structure as the joint TCI state and the DL TCI state in the individual TCI state is shown.

[0569] exist Fig.18 TCI Status ID D,0 Field 1820 and TCI Status ID U,0 Field 1825 may be 7 bits long to express up to 128 TCI states. Therefore, in order to use 7 bits for the TCI state ID D,0 Field 1820, 6 bits 1820 may be assigned to the second octet, and 1 bit 1821 may be assigned to the third octet. Fig.18 In the UL TCI state, the UL TCI state in the separate TCI state uses a different high-level signaling structure from the joint TCI state and the DL TCI state in the separate TCI state. Therefore, since the UL TCI state requires 6 bits to enable the expression of a maximum of 64 UL TCI states, the TCI state ID U,0 The first bit of the field 1825 may be fixed to 0 or 1, and the bit expressing the actual UL TCI state may correspond to only a total of 6 bits from the second bit to the seventh bit.

[0570] Fig.19 A MAC-CE structure for activation and indication of individual TCI states in a wireless communication system according to an embodiment is shown.

[0571] refer to Fig.19, the serving cell ID field 1905 may indicate the serving cell ID, and the BWP ID field 1910 may indicate the BWP ID. The S field 1900 may indicate the number of individual TCI state set information included in the MAC-CE. If the value of the S field 1900 is 1, the MAC-CE may indicate one individual TCI state set and may include only up to the third octet. If the value of the S field 1900 is 0, the MAC-CE may include two or more individual TCI state set information, and the corresponding code point of the TCI state field of the DCI format 1_1 or 1_2 may correspond to the corresponding individual TCI state set, so that the corresponding individual TCI state set is activated, and up to 8 individual TCI state sets may be activated. C D,0 Field 1915 may indicate whether the indicated separate TCI state set includes a DL TCI state, where if C D,0 If the value of field 1915 is 1, the DL TCI state may be included, and the TCI state ID may be used. D,0 Field 1925 indicates the DL TCI status, and if C D,0 If the value of field 1915 is 0, the DL TCI state is not included, and the TCI state ID D,0 Field 1925 may be ignored. Similarly, C U,0 Field 1920 may indicate whether the indicated separate TCI state set includes a DL TCI state, where if C U,0 If the value of field 1920 is 1, the UL TCI status may be included, and the TCI status ID may be used. U,0 Field 1930 indicates the UL TCI status, and if C U,0 If the value of field 1920 is 0, the UL TCI state is not included, and the TCI state ID U,0 Field 1930 may be ignored.

[0572] Fig.19 An example of MAC-CE when the UL TCI state in the individual TCI state uses the same higher layer signaling structure as the joint TCI state and the DL TCI state in the individual TCI state is shown.

[0573] exist Fig.19 TCI Status ID D,0 Field 1925 and TCI Status ID U,0Field 1930 may be 7 bits in length to express a maximum of 128 TCI states. This describes the MAC-CE when the UL TCI state in the individual TCI state uses a different higher layer signaling structure than the DL TCI state in the joint TCI state and the individual TCI state. Therefore, since the UL TCI state requires 6 bits to enable expression of a maximum of 64 UL TCI states, the TCI state ID D,0 The first bit of the field 1925 may be fixed to 0 or 1, and the bit expressing the actual UL TCI state may correspond to only a total of 6 bits from the second bit to the seventh bit.

[0574] Fig. 20 A MAC-CE structure for activation and indication of individual TCI states in a wireless communication system according to an embodiment is shown.

[0575] refer to Fig. 20 , the serving cell ID field 2005 may indicate the serving cell ID, and the BWP ID field 2010 may indicate the BWP ID. The S field 2000 may indicate the number of individual TCI state set information included in the MAC-CE. If the value of the S field 2000 is 1, the MAC-CE may indicate one individual TCI state set and may include only up to the third octet. Fig. 20 The MAC-CE structure of the MAC-CE may indicate a separate TCI state set by using two octets, and if the separate TCI state set includes a DL TCI state, the first octet of the two octets may indicate the DL TCI state, and the second octet may indicate the UL TCI state. This order may be changed.

[0576] For example, if the value of the S field 2000 is 0, the MAC-CE may include two or more pieces of separate TCI state set information, and the corresponding code point of the TCI state field of the DCI format 1_1 or 1_2 may activate the corresponding separate TCI state set, and a maximum of 8 separate TCI state sets may be activated. 0,0 Field 2015 may have a field for distinguishing by TCI status ID 0,0 Field 2025 indicates whether the TCI state is a DL TCI state or a UL TCI state. 0,0 The value of field 2015 is 1, which may indicate the DL TCI state. The DL TCI state may be determined by the TCI state ID. 0,0 Field 2025 indicates that a third octet may be present. In this case, if C 1,0 If the value of field 2020 is 1, the TCI status ID 1,0 Field 2030 indicates the UL TCI status, and if C1,0 If the value of field 2020 is 0, the TCI status ID can be ignored. 1,0 Field 2030. If C 0,0 If the value of field 2015 is 0, the TCI status ID 0,0 Field 2025 is used to indicate the UL TCI status, and the third octet may not be present. 0,0 Field 2015 and C 1,0 This interpretation of Field 2020 is an example only and does not exclude C 0,0 Field 2015 values ​​0 and 1 or the opposite arrangement of the DL TCI state value and the UL TCI state value.

[0577] Fig. 20 An example of MAC-CE when the UL TCI state in the individual TCI state uses the same higher layer signaling structure as the joint TCI state and the DL TCI state in the individual TCI state is shown.

[0578] exist Fig. 20 TCI Status ID 0,0 Field 2025 and TCI Status ID 1,0 Field 2030 may be 7 bits in length to express up to 120 TCI states. Alternatively, Fig. 20 An example of MAC-CE can be shown when the UL TCI state in the individual TCI state uses a different higher layer signaling structure than the DL TCI state in the joint TCI state and the individual TCI state. 0,0 Field 2025 may be 7 bits, thereby enabling the expression of 6 bits for expressing a maximum of 64 possible UL TCI states and 7 bits for expressing a maximum of 120 possible DL TCI states. 1,0 The value of field 2015 is 1 and therefore the TCI status ID 0,0 Field 2025 indicates the UL TCI state, then the TCI state ID 0,0 The first bit of the field 2025 may be fixed to 0 or 1, and the bit expressing the actual UL TCI state may correspond to only a total of 6 bits from the second bit to the seventh bit.

[0579] Fig.21 A MAC-CE structure for activation and indication of individual TCI states in a wireless communication system according to an embodiment is shown.

[0580] refer to Fig.21, the serving cell ID field 2105 may indicate the serving cell ID, and the BWP ID field 2110 may indicate each of the serving cell ID and the BWP ID. The S field 2100 may indicate the number of individual TCI state set information included in the MAC-CE. If the value of the S field 2100 is 1, the MAC-CE may indicate one individual TCI state set and may include only up to the third octet.

[0581] For example, if the value of the S field 2100 is 0, the MAC-CE may include two or more pieces of separate TCI state set information, and the corresponding code point of the TCI state field of the DCI format 1_1 or 1_2 may activate the corresponding separate TCI state set, and a maximum of 8 separate TCI state sets may be activated. 0 Field 2115 may indicate which individual TCI states are included in the indicated individual TCI state set, and for C 0 The value of field 2115, a value of "00" may indicate reserved, a value of "01" may indicate a DL TCI state, a value of "10" may indicate a UL TCI state, and a value of "11" may indicate a DL TCI state and a UL TCI state. However, this is only an example, and C 0 The interpretation of field 2115 is not limited thereto. TCI Status ID U,0 Field 2120 and TCI Status ID D,0 Field 2125 may respectively refer to the UL TCI state and DL TCI state that may be included in the zeroth individual TCI state set for indication. 0 If the value of the field is "01", the TCI status ID D,0 Field 2125 may indicate the DL TCI state, and the TCI state ID U,0 Field 2120 may be ignored. If C 0 If the value of field 2115 is "10", the third octet may be ignored and the TCI Status ID U,0 Field 2120 may indicate the UL TCI status. 0 If the value of field 2115 is "11", the TCI status ID D,0 Field 2125 may indicate the DL TCI state, and the TCI state ID U,0 The field 2120 may indicate the UL TCI state. The R field 2121 may be a 1-bit reserved field that does not include indication information.

[0582] Fig.21An example of MAC-CE used when the UL TCI state in the individual TCI state uses a different higher layer signaling structure than the DL TCI state in the joint TCI state and the individual TCI state is shown.

[0583] exist Fig.21 , 7 bits can be used for TCI status ID D,0 The length of field 2125 is such that a maximum of 128 TCI states can be expressed, and 6 bits can be used for the TCI state ID. U,0 The length of field 2120 is such as to express a maximum of 64 TCI states.

[0584] Fig. 22 A MAC-CE structure for activation and indication of a joint TCI state and a separate TCI state in a wireless communication system according to an embodiment is shown.

[0585] refer to Fig. 22 , the serving cell ID field 2205 may indicate a serving cell identifier (ID), and the BWP ID field 2210 may indicate a BWP ID. The J field 2200 may indicate whether the TCI state indicated via the MAC CE is a joint TCI state or a separate TCI state set. For example, if the value of the J field 2200 is 1, the MAC-CE may indicate a joint TCI state, and if the value of the J field 2200 is 0, the MAC-CCE may indicate a separate TCI state set. The interpretation of the J field 2200 as described above is only an example, and does not exclude different interpretations.

[0586] If the MAC-CE indicates the joint TCI state, all odd octets except the first octet may be ignored (third octet, fifth octet, ...). 0,0 Field 2215 may indicate whether MAC-CE indicates one joint TCI state or includes two or more pieces of TCI state information, and whether the corresponding code point of the TCI state field of DCI format 1_1 or 1_2 activates the corresponding TCI state. 0,0 If the value of field 2215 is 1, the MAC-CE may indicate a joint TCI state, and the third octet or more may not be present. 0,0 If the value of field 2215 is 0, the two or more joint TCI states indicated by the MAC-CE may correspond to the corresponding code points of the TCI state field of DCI format 1_1 or 1_2 and may be activated. 0,0 May refer to the joint TCI status of the first indication.

[0587] If MAC-CE indicates a single TCI state set, C 0,0Field 2215 may have a TCI status ID 0,0 Field 2225 indicates whether the TCI state is a DL TCI state or a UL TCI state. A value of 1 may indicate a DL TCI state. A value of 2225 may indicate a DL TCI state. A value of 1 may indicate a DL TCI state. 0,0 Field 2225 indicates that a third octet may be present. In this case, if C 1,0 If the value of field 2220 is 1, the TCI status ID 1,0 Field 2230 indicates the UL TCI status, and if C 1,0 If the value of field 2220 is 0, the TCI status ID can be ignored. 1,0 Field 2230. If C 0,0 If the value of field 2215 is 0, the TCI status ID 0,0 Field 2225 indicates the UL TCI status and the third octet may not exist.

[0588] Fig. 22 The MAC-CE used when the UL TCI state in the individual TCI state uses the same high-level signaling structure as the DL TCI state in the joint TCI state and the individual TCI state is shown. 0,0 Field 2225 and TCI Status ID 1,0 Field 2230 may be 7 bits in length to express up to 128 TCI states. Fig. 22 The MAC-CE used when the UL TCI state in the individual TCI state uses a different higher layer signaling structure than the DL TCI state in the joint TCI state and the individual TCI state is shown. 0,0 Field 2225 may use 7 bits, thereby enabling the expression of 6 bits for expressing up to 64 possible UL TCI states and 7 bits for expressing up to 128 possible DL TCI states. 0,0 The value of field 2215 is 1 and therefore the TCI status ID 0,0 Field 2225 indicates the UL TCI state, then TCI state ID 0,0 The first bit of the field 2225 may be fixed to 0 or 1, and the bit expressing the actual UL TCI state may correspond to a total of 6 bits from the second bit to the seventh bit.

[0589] Fig.23 A MAC-CE structure for activation and indication of a joint TCI state and a separate TCI state in a wireless communication system according to an embodiment is shown.

[0590] refer to Fig.23, the serving cell ID field 2305 and the BWP ID field 2310 may indicate the serving cell ID and the BWP ID, respectively. The J field 2300 may indicate whether the TCI state indicated via the MAC CE is a joint TCI state or a separate TCI state set. For example, if the value of the J field 2300 is 1, the MAC-CE may indicate the joint TCI state, and if the value of the J field is 0, the MAC-CE may indicate a separate TCI state set. The explanation of the J field 2300 as described above is only an example, and does not exclude different interpretations.

[0591] If the MAC-CE indicates the joint TCI state, all even-numbered octets (second octet, fourth octet, ...) except the first octet may be ignored. 0 Field 2321 may indicate whether MAC-CE indicates one joint TCI state, or whether two or more TCI states correspond to corresponding code points of the TCI state field of DCI format 1_1 or 1_2 and are activated. 0 If the value of field 2321 is 1, the MAC-CE may indicate a joint TCI state, and the third octet or more may not be present. 0 If the value of field 2321 is 0, the MAC-CE may include two or more pieces of joint TCI state information, and the corresponding code point of the TCI state field of DCI format 1_1 or 1_2 may activate the corresponding joint TCI state. D,0 May refer to the joint TCI status of the first indication.

[0592] If MAC-CE indicates a single TCI state set, C 0 Field 2315 may indicate which individual TCI states are included in the indicated individual TCI state set. 0 The value of field 2315, a value of "00" may indicate reserved, a value of "01" may indicate a DL TCI state, a value of "10" may indicate a UL TCI state, and a value of "11" may indicate a DL TCI state and a UL TCI state. These values ​​are only examples, and the present disclosure is not limited by these examples. TCI State ID U,0 Field 2320 and TCI Status ID D,0 Field 2325 may respectively refer to the UL TCI state and DLTCI state that may be included in the zeroth individual TCI state set for indication. 0 If the value of field 2315 is "01", the TCI status ID D,0 Field 2325 may indicate the DL TCI state and the TCI state ID may be ignored. U,0 Field 2320; if C0 If the value of field 2315 is "10", the TCI status ID U,0 Field 2320 may indicate the UL TCI status; and if C 0 If the value of field 2315 is "11", the TCI status ID D,0 Field 2325 may indicate the DLTCI status. TCI Status ID U,0 Field 2320 may refer to the UL TCI status.

[0593] If S 0 If the value of field 2321 is 1, the MAC-CE may indicate a single TCI state set, and the fourth octet or more may not be present. 0 If the value of field 2321 is 0, the MAC-CE may include two or more pieces of separate TCI state set information, and the corresponding code point of the TCI state field of DCI format 1_1 or 1_2 may activate the corresponding separate TCI state set, and up to 8 separate TCI state sets may be activated. 0 The value of field 2321 is 0 if C 1 ,……,C N-1 If the value of the S field is "10", this indicates that only the UL TCI status is indicated, so that the fifth octet, the seventh octet, ..., the Mth octet can be ignored. n The field may indicate whether there is a subsequent separate TCI status set octet. For example, if S n If the value of this field is 1, the subsequent octets may not be present, and if S n If the value of the field is 0, then there can be C n+1 and TCI Status ID U,n+1 The subsequent octets of these S n The field values ​​are merely examples, and the present disclosure is not limited thereto.

[0594] Fig.23 An example of MAC-CE used when the UL TCI state in the individual TCI state uses a different higher layer signaling structure than the DL TCI state in the joint TCI state and the individual TCI state is shown.

[0595] exist Fig.23 TCI Status ID D,0 Field 2325 may be 7 bits in length to express up to 128 TCI states, and the TCI state ID U,0 Field 2320 may be 6 bits in length to express up to 64 TCI states.

[0596] If the terminal receives a transmit / receive beam related indication via high-layer signaling using a joint TCI state scheme or a separate TCI state scheme, the terminal may receive a PDSCH including a MAC-CE indicating a joint TCI state or a separate TCI state from the base station to perform application of the transmit / receive beam. If two or more joint TCI states or separate TCI state sets are included in the MAC-CE, the terminal may identify that the multiple joint TCI states or separate TCI state sets indicated by the MAC-CE correspond to the corresponding code points of the TCI state field of the DCI format 1_1 or 1_2 from 3ms after transmitting the PUCCH including HARQ-ACK information indicating the reception success or failure of the corresponding PDSCH, and may activate the indicated joint TCI state or separate TCI state set. Thereafter, the terminal may receive DCI format 1_1 or 1_2, and apply a joint TCI state or separate TCI state set indicated by the TCI state field in the corresponding DCI to the UL transmit beam and the DL receive beam. In this case, DCI format 1_1 or 1_2 may include or not include DL data channel scheduling information (with or without DL assignment).

[0597] Fig.24 BAT that may be considered when a unified TCI scheme is used in a wireless communication system according to an embodiment is presented.

[0598] refer to Fig.24 , the terminal can receive DCI format 1_1 or 1_2 including or not including DL data channel scheduling information from the base station, and apply a joint TCI state or a separate TCI state set indicated by the TCI state field in the DCI to the UL transmit beam and the DL receive beam.

[0599] DCI format 1_1 or 1_2 with DL assignment 2400: If the terminal receives a PDCCH 2401 DCI format 1_1 or 1_2 including DL data channel scheduling information from the base station, and indicates a joint TCI state or a separate TCI state set based on the unified TCI scheme, the terminal can receive a PDSCH 2405 scheduled based on the received DCI, and transmit a PUCCH 2410 including a HARQ-ACK indicating a reception success or failure of the PDSCH and the DCI to the base station. In this case, the HARQ-ACK may include a reception success or failure of both the DCI and the PDSCH, and if at least one of the DCI and the PDSCH cannot be received, the terminal may transmit a NACK, and if both are successfully received, the terminal may transmit an ACK.

[0600] DCI format 1_1 or 1_2 without DL assignment 2450: If the terminal receives DCI format 1_1 or 1_2 2455 that does not include DL data channel scheduling information from the base station and indicates one joint TCI state or a separate TCI state set based on the unified TCI scheme, the terminal can assume the following for the DCI.

[0601] Includes a CRC scrambled using the CS-RNTI.

[0602] The value of all bits assigned to all fields used as RV fields is 1.

[0603] The value of all bits assigned to all fields used as MCS fields is 1.

[0604] The values ​​of all bits assigned to all fields used as NDI fields are 0.

[0605] For FDRA type 0, all bits assigned to the FDRA field have a value of 0, for FDRA type 1, all bits assigned to the FDRA field have a value of 1, and if the FDRA scheme is dynamicSwitch, all bits assigned to the FDRA field have a value of 0.

[0606] The terminal may transmit a PUCCH 2460 including HARQ-ACK indicating reception success or failure of DCI format 1_1 or 1_2 to the base station.

[0607] For both DCI formats 1_1 or 1_2 with DL assignment 2400 and without DL assignment 2450, if the new TCI state indicated via DCI 2401 or 2455 is the same as the TCI state already indicated and applied to the UL transmit beam and the DL receive beam, the terminal can maintain the previously applied TCI state. If the new TCI state is different from the previously indicated TCI state, the terminal can determine that the time point at which the joint TCI state or the individual TCI state set indicated by the TCI state field included in the DCI is applied is from the start point 2420 or 2470 of the first time slot after the BAT 2415 or 2465 after the PUCCH is transmitted (interval 2430 or 2480), and the previously indicated TCS state can be used until the interval 2425 or 2475 before the start point 2420 or 2470 of the time slot.

[0608] For both DCI formats 1_1 or 1_2 with DL assignment 2400 and without DL assignment 2450, the BAT is a specific number of OFDM symbols and may be configured via higher layer signaling based on UE capability reporting information. The BAT and the parameter set for the first slot after the BAT may be determined based on the minimum parameter set among all cells to which a joint TCI state or a separate TCI state set indicated via DCI is applied.

[0609] The terminal may apply one joint TCI state indicated via MAC-CE or DCI to receiving a CORESET linked to all UE-specific search spaces, receiving a PDSCH scheduled via a PDCCH transmitted from the CORESET, transmitting a PUSCH, and transmitting all PUCCH resources.

[0610] If a single TCI state set indicated via MAC-CE or DCI includes a DL TCI state, the terminal may apply the single TCI state set to receiving a CORESET linked to all UE-specific search spaces and receiving a PDSCH scheduled via a PDCCH transmitted from the CORESET, and may apply it to all PUSCH and PUCCH resources based on the previously indicated UL TCI state.

[0611] If a separate TCI state set indicated via MAC-CE or DCI includes a UL TCI state, the terminal can apply the separate TCI state set to all PUSCH and PUCCH resources, and based on the previously indicated DL TCI state, the terminal can apply the separate TCI state set to receiving a CORESET linked to all UE-specific search spaces and receiving a PDSCH scheduled via a PDCCH transmitted from the CORESET.

[0612] If a separate TCI state set indicated via MAC-CE or DCI includes a DL TCI state and a UL TCI state, the terminal can apply the DL TCI state to receiving a CORESET linked to a UE-specific search space and receiving a PDSCH scheduled via a PDCCH transmitted from the CORESET, and can apply the UL TCI state to all PUSCH and PUCCH resources.

[0613] exist Figures 15 to 23 In the example of the MAC CE in , one or more elements may be connected to each other.

[0614] When determining whether to apply collaborative communication, the terminal may use various methods, in which the PDCCH to which the collaborative communication is applied is assigned has a specific format, the PDCCH to which the collaborative communication is applied includes a specific indicator indicating whether the collaborative communication is applied, the PDCCH to which the collaborative communication is applied is assigned is scrambled by a specific RNTI, it is assumed that the collaborative communication is applied in a specific part indicated by a higher layer, etc. Hereinafter, for ease of description, a case in which the terminal receives the PDSCH to which the collaborative communication is applied based on conditions similar to those described above will be referred to as an NC-JT case.

[0615] First embodiment: Multi-TCI status indication and activation method based on unified TCI solution

[0616] The multi-TCI state indication and activation method may refer to a case where the number of indicated joint TCI states is extended to two or more and each of the DL TCI states and the UL TCI states included in a single TCI state set is extended to two or more. If a single TCI state set may include a maximum of two DL TCI states and a maximum of two UL TCI states, a total of 8 combinations of DL TCI states and UL TCI states in a single TCI state set may be possible ({DL, UL} = {0, 1}, {0, 2}, {1, 0}, {1, 1}, {1, 2}, {2, 0}, {2, 1}, {2, 2}, where the number indicates the number of TCI states).

[0617] If a plurality of TCI states are indicated to the terminal by the base station based on MAC-CE, the terminal may receive two or more joint TCI states or one separate TCI state set from the base station via MAC-CE. The base station may schedule the reception of the PDSCH including the MAC-CE for the terminal via the PDCCH, and from 3 ms after transmitting the PUCCH including HARQ-ACK information indicating the success or failure of reception of the PDSCH including the MAC-CE, the terminal may determine the UL transmit beam or transmit filter and the DL receive beam or receive filter based on the indicated two or more joint TCI states or one separate TCI state set.

[0618] If multiple TCI states are indicated from the base station to the terminal based on DCI format 1_1 or 1_2, the corresponding code point of a TCI state field in DCI format 1_1 or 1_2 may indicate two or more joint TCI states or two or more separate TCI state sets. In this case, the terminal may receive a MAC-CE from the base station and activate two or more joint TCI states or two or more separate TCI state sets corresponding to the corresponding code point of a TCI state field in DCI format 1_1 or 1_2. The base station may schedule the reception of a PDSCH including a MAC-CE for the terminal via the PDCCH, and the terminal may activate the TCI state information included in the MAC-CE from 3ms after transmitting a PUCCH including HARQ-ACK information indicating the success or failure of reception of the PDSCH including the MAC-CE.

[0619] If multiple TCI states are indicated from the base station to the terminal based on DCI format 1_1 or 1_2, there may be two or more TCI state fields in DCI format 1_1 or 1_2, and one of two or more joint TCI states or two or more separate TCI state sets may be indicated based on the corresponding TCI state field. In this case, the terminal may receive a MAC-CE from the base station and activate a joint TCI state or a separate TCI state set corresponding to the corresponding code point of two or more TCI state fields in DCI format 1_1 or 1_2. The base station may schedule the reception of the PDSCH including the MAC-CE for the terminal via the PDCCH. The terminal may activate the TCI state information included in the MAC-CE from 3ms after transmitting the PUCCH including HARQ-ACK information indicating the success or failure of the reception of the PDSCH including the MAC-CE. The presence or absence of one or more additional TCI state fields may be configured for the terminal via high-level signaling, and the bit length of the additional TCI state field may be the same as the bit length of the existing TCI state field, or the length may be adjusted based on high-level signaling.

[0620] The terminal can receive the transmit / receive beam related indication in the unified TCI scheme by using one of the joint TCI state and the separate TCI state configured by the base station. The base station can configure the terminal to use one of the joint TCI state or the separate TCI state via high-level signaling. Regarding the separate TCI state indication, the terminal can be configured via high-level signaling so that the bit length of the TCI state field in DCI format 1_1 or 1_2 is at most 4.

[0621] For each of the joint TCI state scheme and the individual TCI state scheme, there may be a MAC-CE for activating or indicating the above-mentioned multiple joint TCI states and individual TCI states, and the TCI state may be activated or indicated by using one MAC CE based on the joint TCI state scheme or one of the individual TCI state schemes. For the MAC-CE used in the MAC-CE-based indication scheme and the MAC-CE-based activation scheme, one MAC-CE structure may be shared, and each MAC-CE structure may be used.

[0622] Fig.25 A MAC-CE structure for activation and indication of multiple joint TCI states in a wireless communication system according to an embodiment is presented.

[0623] refer to Fig.25 , the serving cell ID field 2505 may indicate the serving cell ID, and the BWP ID field 2510 may indicate the BWP ID. The R field may be a 1-bit reserved field that does not include indication information. The S field 2500 may indicate the number of pieces of joint TCI state set information included in the MAC-CE. If the value of the S field 2500 is 1, the MAC-CE may indicate one or two joint TCI states and may have a length of only up to the third octet. In this case, if the C 0 If the value of field 2515 is 0, there may be no third octet and the TCI status ID may be 0,0 Field 2520 indicates a joint TCI state, and if C 0 If the value of field 2515 is 1, the third octet may be present and may be passed through the TCI status ID 0,0 Field 2520 and TCI Status ID 1,0 Field 2525 indicates two joint TCI states.

[0624] If the value of the S field 2500 is 0, the MAC-CE may activate one or two joint TCI states corresponding to the corresponding code points of the TCI status field of the DCI format 1_1 or 1_2, or may activate one joint TCI state corresponding to the corresponding code points of the two TCI status fields of the DCI format 1_1 or 1_2, and may activate joint TCI states for up to 8 code points. If one or two joint TCI states are activated for one code point of one TCI status field, the TCI status ID 0,Y Field and TCI Status ID 1,YThe fields may refer to the first joint TCI state and the second joint TCI state, respectively, of the two joint TCI states activated at the Yth code point of the TCI state field. If a joint TCI state is activated for one code point in the two TCI state fields, the TCI state ID 0,Y Field and TCI Status ID 1,Y The Y_th code point of the first TCI status field and the second TCI status field may refer to the corresponding joint TCI status activated at the Yth code point of the first TCI status field and the second TCI status field, respectively.

[0625] Fig.26 A MAC-CE structure for activation and indication of multiple individual TCI states in a wireless communication system according to an embodiment is shown.

[0626] refer to Fig.26 , the serving cell ID field 2605 may indicate the serving cell ID, and the BWP ID field 2610 may indicate the BWP ID. The R field may be a 1-bit reserved field that does not include indication information. The S field 2600 may indicate the number of individual TCI state set information included in the MAC-CE. If the value of the S field 2600 is 1, the MAC-CE may indicate one individual TCI state set and may include only up to the fifth octet. If the value of the S field 2600 is 0, the MAC-CE may include information about multiple individual TCI state sets, may activate one individual TCI state set corresponding to the corresponding code point of the TCI state field of DCI format 1_1 or 1_2, or may activate one individual TCI state set corresponding to the terminal code point of the two TCI state fields of DCI format 1_1 or 1_2, and may activate individual TCI states of up to 8 or 16 code points via high-layer signaling.

[0627] exist Fig.26 In the MAC-CE structure of C, starting from the second octet, every 4 octets can correspond to a separate TCI state set. 0 Field 2615 can have a total of 8 values ​​from "000" to "111", and as described above, these values ​​can respectively correspond to the 8 cases that a single TCI state set can have.

[0628] C 0 The value of the field "000" may indicate a single TCI state set including a UL TCI state, TCI state ID D,0,0 Fields 2620 and 2621 may be ignored and the TCI Status ID U,0,0 Field 2625 may include a piece of UL TCI status information. In addition, the fourth octet and the fifth octet may be ignored.

[0629] C 0 The value of the field "001" may indicate a single TCI state set including two UL TCI states, TCI state ID D,0,0 Fields 2620 and 2621 may be ignored and the TCI Status ID U,0,0 Field 2625 may include the first UL TCI state information of the two UL TCI states. The fourth octet may be ignored and the TCI state ID U,1,0 Field 2635 may include second UL TCI state information of the two UL TCI states.

[0630] C 0 The value of the field "010" may indicate a single TCI state set including a DL TCI state, TCI state ID D,0,0 Fields 2620 and 2621 may include a DL TCI status information, and TCI status ID U,0,0 Field 2625 and the fourth and fifth octets may be ignored.

[0631] C 0 The value of the field "011" can indicate a single TCI state set including a DL TCI state and a UL TCI state. D,0,0 Fields 2620 and 2621 may include a DL TCI status information, and TCI status ID U,0,0 Field 2625 may include a piece of UL TCI status information. The fourth octet and the fifth octet may be ignored.

[0632] C 0 The value of the field "100" can indicate a single TCI state set including one DL TCI state and two UL TCI states. D,0,0 Fields 2620 and 2621 may include a DL TCI status information, and TCI status ID U,0,0 Field 2625 may include the first UL TCI state information of the two UL TCI states. The fourth octet may be ignored and the TCI state ID U,1,0 Field 2635 may include second UL TCI state information of the two UL TCI states.

[0633] C 0 The value of the field "101" may indicate that a single TCI state set includes two DL TCI states, TCI state ID D,0,0Fields 2620 and 2621 may include the first DL TCI state information of the two DL TCI states, and the TCI state ID U,0,0 Field 2625 and the fifth octet may be ignored. TCI Status ID D,1,0 Field 2630 may include second DL TCI state information of the two DL TCI states.

[0634] C 0 The value of the field is "110" to indicate that a single TCI state set includes two DL TCI states and one UL TCI state. D,0,0 Fields 2620 and 2621 may include the first DL TCI state information of the two DL TCI states, TCI state ID U,0,0 Field 2625 may include a UL TCI status information, TCI status ID D,1,0 Field 2630 may include second DL TCI state information of the two DL TCI states, and the fifth octet may be ignored.

[0635] C 0 The value of the field "111" can indicate that a single TCI state set includes two DL TCI states and two UL TCI states. D,0,0 Fields 2620 and 2621 may include the first DL TCI state information of the two DL TCI states, TCI state ID U,0,0 Field 2625 may include the first UL TCI state information of the two UL TCI states, TCI state ID D,1,0 Field 2630 may include the second DL TCI state information of the two DL TCI states, and the TCI state ID U,1,0 Field 2635 may include second UL TCI state information of the two UL TCI states.

[0636] Fig.26 The MAC-CE used when the UL TCI state in the individual TCI state uses a different higher layer signaling structure than the DL TCI state in the joint TCI state and the individual TCI state is shown.

[0637] refer to Fig.26 Since the UL TCI state requires 6 bits to express a maximum of 64 UL TCI states, the TCI state ID expressing the UL TCI state U,0,0 To TCI Status ID U,1,N The field can be expressed in 6 bits, and the TCI state ID expressing the DL TCI state D,0,0 To TCI Status IDD,1,N The field can be expressed using 7 bits.

[0638] Fig. 27 A MAC-CE structure for activation and indication of multiple individual TCI states in a wireless communication system according to an embodiment is shown.

[0639] refer to Fig. 27 , the serving cell ID field 2705 may indicate the serving cell ID, and the BWP ID field 2710 may indicate the BWP ID. The R field may be a 1-bit reserved field that does not include indication information. The S field 2700 may indicate the number of individual TCI state set information included in the MAC-CE. For example, if the value of the S field 2700 is 1, the MAC-CE may indicate one individual TCI state and may have a length of only up to the fifth octet.

[0640] For example, if the value of the S field 2700 is 0, the MAC-CE may include information about multiple separate TCI state sets, and the MAC-CE may activate a separate TCI state set corresponding to the corresponding code point of the TCI state field of DCI format 1_1 or 1_2, or may activate a separate TCI state set corresponding to the corresponding code point of two TCI state fields of DCI format 1_1 or 1_2, and may activate separate TCI state sets corresponding to up to 8 or 16 code points via higher layer signaling.

[0641] exist Fig. 27 In the MAC-CE structure, starting from the second octet, every 4 octets can correspond to a separate TCI state set. U,0 Field 2715 and C D,0 Field 2721 may respectively refer to the number of UL TCI states and the number of DL TCI states included in one single TCI state set, and may have meanings for corresponding code points as follows.

[0642] C U,0 The value of "00" indicates that the UL TCI state is not included, and therefore the TCI state ID U,0,0 2720 ​​and TCI Status ID U,1,0 2725 can be ignored.

[0643] C U,0 The value of the field is "01" indicating that one UL TCI state is included, and therefore the TCI state ID U,0,0 2720 ​​may include a UL TCI message and TCI status ID U,1,0 2725 can be ignored.

[0644] CU,0 The value of the field is "10" indicating that two UL TCI states are included, and therefore the TCI state ID U,0,0 2720 ​​may include the first UL TCI state information of the two UL TCI states, and the TCI state ID U,1,0 2725 may include second UL TCI state information of the two UL TCI states.

[0645] C D,0 A value of '00' in the field indicates that the DL TCI status is not included, and thus the fourth octet and the fifth octet may be ignored.

[0646] C D,0 The value of the field is "01" indicating that a DL TCI state is included, and therefore the TCI state ID D,0,0 2730 may include one DL TCI status information and the fifth octet may be ignored.

[0647] C D,0 The value of the field is "10" indicating that two DL TCI states are included, and therefore the TCI state ID D,0,0 2730 may include the first DL TCI state information of the two DL TCI states, and the TCI state ID D,1,0 Field 2735 may include second DL TCI state information of the two DL TCI states.

[0648] Fig. 27 An example of MAC-CE used when the UL TCI state in the individual TCI state uses a different higher layer signaling structure than the DL TCI state in the joint TCI state and the individual TCI state is shown.

[0649] exist Fig. 27 In the UL TCI state, since 6 bits are required to express a maximum of 64 UL TCI states, the TCI state ID expressing the UL TCI state is U,0,0 To TCI Status ID U,1,N The field can be expressed in 6 bits, and the TCI state ID expressing the DL TCI state D,0,0 To TCI Status ID D,1,N The field can be expressed using 7 bits.

[0650] exist Figure 25 to Figure 27 In the above example of MAC CE, at least one of the elements may be connected to each other.

[0651] Second embodiment: Additional single TCI state and multi-TCI state indication and activation method based on unified TCI solution

[0652] The terminal may be scheduled from the base station with a PDSCH including a MAC-CE, which may include at least one combination of the following various MAC-CE structures, and starting from 3 slots after HARQ-ACK for the PDSCH is transmitted to the base station, the terminal may interpret the corresponding code point of the TCI status field in DCI format 1_1 or 1_2 based on the information in the MAC-CE received from the base station. That is, the terminal may activate the corresponding entry of the MAC CE received from the base station at the corresponding code point of the TCI status field in DCI format 1_1 or 1_2.

[0653] Fig.28 A MAC-CE structure for activation and indication of a joint TCI state or a separate DL or UL TCI state in an embodiment of a wireless communication system is presented.

[0654] refer to Fig.28 , the meanings of the corresponding fields in the MAC-CE structure are as follows.

[0655] Serving Cell ID 2800: This field may indicate the serving cell to which the corresponding MAC-CE is to be applied. The length of this field may be 5 bits. If the serving cell indicated by this field is included in one or more of simultaneousU-TCI-UpdateList1, simultaneousU-TCI-UpdateList2, simultaneousU-TCI-UpdateList3, and simultaneousU-TCI-UpdateList4 as high-layer signaling, the MAC-CE may be applied to all serving cells included in one or more lists of simultaneousU-TCI-UpdateList1, simultaneousU-TCI-UpdateList2, simultaneousU-TCI-UpdateList3, and simultaneousU-TCI-UpdateList4 including the serving cell indicated by this field.

[0656] DL BWP ID 2805: The DL BWP ID field may indicate the DL BWP to which the corresponding MAC-CE is to be applied, and the meaning of each code point in this field may correspond to each code point of the BWP indicator in the DCI. The length of this field may be 2 bits.

[0657] UL BWP ID 2810: The UL BWP ID field may indicate the UL BWP to which the corresponding MAC-CE is to be applied, and the meaning of each code point in this field may correspond to each code point of the BWP indicator in the DCI. The length of this field may be 2 bits.

[0658] P i 2815: This field may indicate whether the corresponding code point of the TCI status field in DCI format 1_1 or 1_2 has multiple TCI states or one TCI state. i A value of 1 may indicate that the i-th code point has multiple TCI states, which may indicate that the code point may include a separate DL TCI state and a separate UL TCI state. i A value of 0 may indicate that the i-th codepoint has a single TCI state, which may indicate that the codepoint may include one of a joint TCI state, a DCI-only TCI state, or a UL-only TCI state.

[0659] D / U 2820: This field may indicate whether the TCI State ID field in the same octet is a joint TCI state, a separate DL TCI state, or a separate UL TCI state. If this field is 1, the TCI State ID field in the same octet may be a joint TCI state or a separate DL TCI state, and if this field is 0, the TCI State ID field in the same octet may be a separate UL TCI state.

[0660] TCI State ID 2825: The TCI State ID field may indicate a TCI state that may be identified by TCI-StateId as higher layer signaling. If the D / U field is configured to 1, this field may be used to express a TCI-StateId that may be expressed using 7 bits. If the D / U field is configured to 0, the MSB of this field may be regarded or identified as a reserved bit, and the remaining 6 bits may be used to express the UL-TCIState-Id as higher layer signaling. The maximum number of TCI states that may be activated may be 8 for a joint TCI state, and may be 16 for a separate DL or UL TCI state.

[0661] R: R indicates a reserved bit and may be configured to 0.

[0662] Regardless of whether unifiedTCI-StateType-r17 in MIMOparam-r17 in ServingCellConfig as the higher-layer signaling is configured as a joint TCI state or a separate TCI state, Fig.28 Including P 1 , P 2 ,……,P 8The third octet of the field may be included in the corresponding MAC-CE structure. In this case, the terminal may use a fixed MAC-CE structure to perform TCI state activation regardless of the high-level signaling configured by the base station. As another example, regarding the above Fig.28 The MAC-CE structure can be omitted when the unifiedTCI-StateType-r17 in the MIMOparam-r17 in the ServingCellConfig as the higher-level signaling is configured as the joint TCI state. Fig.28 Including P 1 , P 2 ,……,P 8 In this case, the terminal can save up to 8 bits of the MAC-CE payload according to the higher layer signaling configured by the base station. Fig.28 All D / U fields located at the first position from the fourth octet in the byte may be regarded or recognized as R fields, and all R fields may be configured as 0 bits.

[0663] If the terminal is configured with two different values ​​of CORESETPoolIndex via higher layer signaling and DLorJointTCIState or UL TCIState as higher layer signaling is configured, the base station and the terminal may expect that the R field 2830 present in the first octet is interpreted as a field indicating the CORESET pool ID (in one of the MAC-CE structures indicating activation of the unified TCI state). Fig.28 If the corresponding CORESET pool ID is configured as 0, the terminal may consider that MAC-CE can be applied to each code point of the TCI status field in the PDCCH transmitted in the CORESET corresponding to CORESETPoolIndex 0. If the CORESET pool ID is configured as 1, the terminal may consider that MAC-CE can be applied to each code point of the TCI status field in the PDCCH transmitted in the CORESET corresponding to CORESETPoolIndex 1.

[0664] Fig.29 A MAC-CE structure for activation and indication of multiple joint TCI states or individual DL or UL TCI states in a wireless communication system according to an embodiment is presented.

[0665] refer to Fig.29 , the meanings of the corresponding fields in the MAC-CE structure are as follows.

[0666] Serving Cell ID 2900: This field may indicate the serving cell to which the corresponding MAC-CE is to be applied. The length of this field may be 5 bits. If the serving cell indicated by this field is included in one or more of simultaneousU-TCI-UpdateList1, simultaneousU-TCI-UpdateList2, simultaneousU-TCI-UpdateList3, and simultaneousU-TCI-UpdateList4 as high-layer signaling, the MAC-CE may be applied to all serving cells included in one or more lists of simultaneousU-TCI-UpdateList1, simultaneousU-TCI-UpdateList2, simultaneousU-TCI-UpdateList3, and simultaneousU-TCI-UpdateList4 including the serving cell indicated by this field.

[0667] DL BWP ID 2905: This field may indicate the DL BWP to which the corresponding MAC-CE is to be applied, and the meaning of each code point in this field may correspond to each code point of the BWP indicator in the DCI. The length of this field may be 2 bits.

[0668] UL BWP ID 2910: This field may indicate the UL BWP to which the corresponding MAC-CE is to be applied, and the meaning of each code point in this field may correspond to each code point of the BWP indicator in the DCI. The length of this field may be 2 bits.

[0669] P i 2915: This field may indicate whether the corresponding code point of the TCI status field in DCI format 1_1 or 1_2 has multiple TCI states or one TCI state.

[0670] If unifiedTCI-StateType-r17 in MIMOparam-r17 in ServingCellConfig as higher layer signaling is configurable for one of the joint TCI state and the separate TCI state, the terminal may interpret this field as follows regardless of the configuration information of which of the two TCI states is configured.

[0671] P i A value of '00' may indicate that the corresponding i-th code point has a single TCI state, which may indicate that the code point may include one of a joint TCI state, a separate DCI TCI state, or a separate UL TCI state.

[0672] Pi A value of "01" may indicate that the i-th code point has two TCI states, which may indicate that the code point may include one of a set of two joint TCI states, a set of one separate DL TCI state and one separate UL TCI state, a set of two separate DL TCI states, and a set of two separate UL TCI states.

[0673] P i A value of "10" may indicate that the i-th code point has three TCI states, which may indicate that the code point may include one of a set of one single DL TCI state and two single UL TCI states and a set of two single DL TCI states and one single UL TCI state.

[0674] P i A value of 11 may indicate that the i-th code point has four TCI states, which may indicate that the code point may include two separate DL TCI states and two separate UL TCI states.

[0675] If unifiedTCI-StateType-r17 in MIMOparam-r17 in ServingCellConfig as high-layer signaling is configurable for one of joint mode, separate mode, and hybrid mode, the terminal may interpret the field as follows regardless of the configuration value used for configuration in the possible configuration values. The hybrid mode may be expressed by one configuration value indicating that a common hybrid mode of a joint TCI state and a separate DL or UL TCI state is possible, and may be expressed by multiple configuration values ​​such as "1joint+1DL" and "1joint+1UL" to be configured to indicate a specific combination of a specific number of joint TCI states and a specific number of separate DL or UL TCI states.

[0676] P i A value of '00' may indicate that the i-th code point has a single TCI state, which may indicate that the code point may include one of a joint TCI state, a separate DCI TCI state, or a separate UL TCI state.

[0677] P iA value of "01" may indicate that the i-th code point has two TCI states, which may indicate that the code point may include one of a set of two joint TCI states, a set of one joint TCI state and a separate DL TCI state, a set of one joint TCI state and a separate UL TCI state, a set of one DL TCI state and a separate UL TCI state, a set of two separate DL TCI states, and a set of two separate UL TCI states. If a general mixed mode indicating a joint TCI state and a separate DL or UL TCI state is possible in the terminal configuration as in the mixed mode of unifiedTCI-StateType-r17 in MIMOparam-r17 in ServingCellConfig as higher layer signaling, then the above two modes of a set of one joint TCI state and a separate DL TCI state and a set of one joint TCI state and a separate UL TCI state may be possible. If the terminal is configured with one of "1joint+1DL" and "1joint+1UL" for unifiedTCI-StateType-r17 in MIMOparam-r17 in ServingCellConfig as high-layer signaling, then among the above-mentioned set of one joint TCI state and one separate DL TCI state and one set of one joint TCI state and one separate UL TCI state, only the case corresponding to the configuration value of unifiedTCI-StateType-r17 may be possible.

[0678] P i A value of "10" may indicate that the i-th code point has three TCI states, which may indicate that the code point may include a set of one single DL TCI state and two single UL TCI states or a set of two single DL TCI states and one single UL TCI state.

[0679] P i A value of "11" may indicate that the i-th code point has four TCI states, which may indicate that the code point may include two separate DL TCI states and two separate UL TCI states.

[0680] The corresponding field may be 2 bits.

[0681] D / U 2920: This field may indicate whether the TCI State ID field in the same octet is a joint TCI state, a separate DL TCI state, or a separate UL TCI state. If this field is 1, the TCI State ID field in the same octet may be a joint TCI state or a separate DL TCI state, and if this field is 0, the TCI State ID field in the same octet may be a separate UL TCI state.

[0682] TCI State ID N 2925: This field may indicate a TCI state that may be identified by TCI-StateId as a higher layer signaling. If the D / U field is configured to 1, this field may be used to express a TCI-StateId that may be expressed using 7 bits. If the D / U field is configured to 0, the MSB of this field may be regarded as a reserved bit, and the remaining 6 bits may be used to express the UL-TCIState-Id as a higher layer signaling. The maximum number of TCI states that may be activated may be 8 for a joint TCI state, and may be 16 for a separate DL or UL TCI state.

[0683] R: R indicates a reserved bit and may be configured to 0.

[0684] Fig.30 A MAC-CE structure for activation and indication of multiple joint TCI states or individual DL or UL TCI states in a wireless communication system according to an embodiment is presented.

[0685] refer to Fig.30 , the meanings of the corresponding fields in the MAC-CE structure are as follows.

[0686] Serving Cell ID 3000: This field may indicate the serving cell to which the corresponding MAC-CE is to be applied. The length of this field may be 5 bits. If the serving cell indicated by this field is included in one or more of simultaneousU-TCI-UpdateList1, simultaneousU-TCI-UpdateList2, simultaneousU-TCI-UpdateList3, and simultaneousU-TCI-UpdateList4 as high-layer signaling, the MAC-CE may be applied to all serving cells included in one or more lists of simultaneousU-TCI-UpdateList1, simultaneousU-TCI-UpdateList2, simultaneousU-TCI-UpdateList3, and simultaneousU-TCI-UpdateList4 including the serving cell indicated by this field.

[0687] DL BWP ID 3005: This field may indicate the DL BWP to which the corresponding MAC-CE is to be applied, and the meaning of each code point in this field may correspond to each code point of the BWP indicator in the DCI. The length of this field may be 2 bits.

[0688] UL BWP ID 3010: This field may indicate the UL BWP to which the corresponding MAC-CE is to be applied, and the meaning of each code point in this field may correspond to each code point of the BWP indicator in the DCI. The length of this field may be 2 bits.

[0689] P i,1 3015 and P i,2 3020: These two fields may indicate whether the corresponding code point of the TCI status field in DCI format 1_1 or 1_2 has multiple TCI states or one TCI state.

[0690] For the case where unifiedTCI-StateType-r17 in MIMOparam-r17 in ServingCellConfig as high-layer signaling can be configured for one of the joint TCI state and the separate TCI state or can be configured for one of the joint mode, separate mode and mixed mode, if the terminal is configured with unifiedTCI-StateType-r17 as high-layer signaling for the joint TCI state, then Fig.38 P can be omitted 1,2 , P 2,2 ,……,P 8,2 The fourth octet of the field and may be used only for P i,1 Explanation is as follows. The hybrid mode may be expressed by one configuration value indicating that a common hybrid mode of a joint TCI state and a separate DL or UL TCI state is possible, and may be expressed by multiple configuration values ​​(such as "1joint+1DL" and "1joint+1UL"), thereby being configured to indicate a specific combination of a specific number of joint TCI states and a specific number of separate DL or UL TCI states.

[0691] P i,1 A value of "0" may indicate that the corresponding i-th code point has one TCI state, which may indicate that the code point includes one joint TCI state.

[0692] P i,1 A value of "1" may indicate that the i-th codepoint has two TCI states, which may indicate that the codepoint includes two joint TCI states.

[0693] For the case where unifiedTCI-StateType-r17 in MIMOparam-r17 in ServingCellConfig as high-layer signaling can be configured for one of the joint TCI state and the separate TCI state or can be configured for one of the joint mode, separate mode and mixed mode, if the terminal is configured with unifiedTCI-StateType-r17 as high-layer signaling for the separate TCI state, the terminal can set the P value of the third octet to i,1 and the fourth octet P i,2 Treated as a 2-bit field and interpreted as follows. The hybrid mode may be expressed by one configuration value indicating that a common hybrid mode of a joint TCI state and a separate DL or UL TCI state is possible, and may be expressed by multiple configuration values ​​(such as "1joint+1DL" and "1joint+1UL") configured to indicate a specific combination of a specific number of joint TCI states and a specific number of separate DL or UL TCI states.

[0694] P i,1 The value is "0" and P i,2 The case of a value of '0' may indicate that the i-th code point has a single TCI state, which may indicate that the code point may include one of a separate DL TCI state or a separate UL TCI state.

[0695] P i,1 The value is "0" and P i,2 The case of a value of '1' may indicate that the i-th code point has two TCI states, which may indicate that the code point may include one of a set of one single DL TCI state and one single UL TCI state, a set of two single DL TCI states, and a set of one single UL TCI state.

[0696] P i,1 The value is "1" and P i,2 The case of a value of "0" may indicate that the i-th code point has three TCI states, which may indicate that the code point may include a set of one single DL TCI state and two single UL TCI states or a set of two single DL TCI states and one single UL TCI state.

[0697] P i,1 The value is "1" and P i,2 The case where the value is "1" may indicate that the i-th code point has four TCI states, which may indicate that the code point may include two separate DL TCI states and two separate UL TCI states.

[0698] For the case where unifiedTCI-StateType-r17 in MIMOparam-r17 in ServingCellConfig as higher layer signaling can be configured for one of joint mode, separate mode and hybrid mode, if the terminal is configured with unifiedTCI-StateType-r17 as higher layer signaling for hybrid mode, the terminal may set the P value of the third octet to i,1 The explanation is as follows, and the fourth octet may not be transmitted. The mixed mode may be expressed by one configuration value indicating that a general mixed mode of joint TCI state and separate DL or UL TCI state is possible.

[0699] P i,1 A value of '0' may indicate that the i-th codepoint includes one joint TCI state and one separate DL TCI state.

[0700] P i,1 A value of "1" may indicate that the i-th codepoint includes one joint TCI state and one separate UL TCI state.

[0701] For the case where unifiedTCI-StateType-r17 in MIMOparam-r17 in ServingCellConfig as higher layer signaling can be configured for one of joint mode, separate mode and hybrid mode, if the terminal is configured with unifiedTCI-StateType-r17 as higher layer signaling for hybrid mode, the terminal may set the P value of the third octet to i,1 and the fourth octet P i,2 The explanation is as follows: The hybrid mode may be expressed by one configuration value indicating that a general hybrid mode of joint TCI state and separate DL or UL TCI state is possible.

[0702] P i,1 A value of "0" may indicate that the i-th codepoint includes only one joint TCI state. That is, since the hybrid mode is not used, P may be ignored. i,2 The value of .

[0703] P i,1 A value of "1" may indicate that the i-th codepoint includes one of a separate UL TCI state and a separate DL TCI state in addition to a joint TCI state. That is, a hybrid mode may be used for this codepoint, where for P i,2 A value of "0" may additionally use a single UL TCI state, and for P i,2 A value of "1" may additionally use a separate UL TCI state.

[0704] D / U 3025: This field may indicate whether the TCI State ID field in the same octet is a joint TCI state, a separate DL TCI state, or a separate UL TCI state. If this field is 1, the TCI State ID field in the same octet may be a joint TCI state or a separate DL TCI state, and if this field is 0, the TCI State ID field in the same octet may be a separate UL TCI state.

[0705] TCI State ID N 3030: The TCI State ID N 3030 field may indicate a TCI state that may be identified by TCI-StateId as higher layer signaling. If the D / U field is configured to 1, the TCI State ID field may be used to express a TCI-StateId that may be expressed using 7 bits. If the D / U field is configured to 0, the MSB of this field may be considered a reserved bit, and the remaining 6 bits may be used to express the UL-TCIState-Id as higher layer signaling. The maximum number of TCI states that may be activated may be 8 for a joint TCI state, and may be 16 for a separate DL or UL TCI state.

[0706] R: R indicates a reserved bit and may be configured to 0.

[0707] For the above-mentioned unifiedTCI-StateType-r17 in MIMOparam-r17 in ServingCellConfig as high-layer signaling, new parameters such as unifiedTCI-StateType-r18 in MIMOparam-r18 as high-layer signaling in ServingCellConfig may be defined, and existing parameters may be reused.

[0708] Third embodiment: beam reporting method using multiple panels for simultaneous transmission

[0709] In NR Rel-17, a scheme has been enhanced and newly introduced by using a unified TCI framework to enable support for beams managed separately for UL and DL in previous versions. Based on the unified TCI, as described above, not only a receive beam for receiving a DL signal but also a transmit beam for transmitting a UL signal can be indicated via TCI. The terminal can determine a transmit beam or a receive beam based on a transmit filter or a receive filter for transmitting or receiving a reference signal indicated by the TCI state.

[0710] In order for the terminal to transmit UL signals simultaneously by using multiple panels, a UL transmit filter for each panel may be required. If the terminal selects two panels from the multiple panels and transmits UL signals via corresponding transmit beams, two transmit beams need to be determined. As an extension of this, if the terminal selects N panels from the multiple panels and transmits UL signals via corresponding transmit beams, N transmit beams need to be determined.

[0711] The terminal may perform beam reporting to the base station to determine the transmit beam. In order to perform beam reporting, the terminal may use a beam reporting method supported up to NR Rel-17. Alternatively, the terminal may use a method that enhances the beam reporting method supported up to NR Rel-17, or may introduce a new beam reporting method that is different from the beam reporting method supported up to NR Rel-17. For example, in order to support simultaneous UL transmission using multiple panels, beam reporting may be performed by additionally performing group-based beam reporting enhanced in NR Rel-17. Regarding the detailed description of enhanced group-based beam reporting, the CSI information reported by the terminal to the base station may include at least some of the following information:

[0712] Resource set indicator

[0713] The first and second CSI-RS resource indicators (CRI) or SSB resource indicators (SSBRI) for each resource group (up to four groups can be defined, and the number of groups configured for the terminal is determined based on the high-level parameters configured by the base station)

[0714] RSRP or differential RSRP of the reported CRI or SSBRI. In this case, RSRP is reported with 7 bits only for the first resource of the first resource group, and differential RSRP is reported with 4 bits for the corresponding other resource groups and resource group resources.

[0715] The CSI information reported by the terminal to the base station is the CSI reporting method supported by NR Rel-17, and the terminal can report additional CSI information for simultaneous multi-panel transmission to the base station by additionally reporting the following information:

[0716] For each resource group and resource group resource, a 2-bit CapabilityIndex (or UE capability set index, etc., which may correspond to an indicator of any name capable of indicating the maximum number of SRS ports that the terminal can support for the reported CRI or SSBRI) is reported.

[0717] That is, the terminal may additionally report the maximum number of SRS ports that can be supported by each beam group and the resources within the group, thereby supporting the base station to use it to configure two TCI states to support the use of multiple panels at the same time. For example, the base station may expect to receive two resources included in the same group via different panels. If the resource group and the corresponding CSI resource set are configured in this way, the base station can activate the two TCI states by using the reported beam group pair. That is, for the enhanced MAC CE for activating / deactivating the unified TCI state in NRRel-17, the conventional operation that can only indicate one TCI state in one code point can be extended to an operation that can indicate up to two TCI states in one code point, and in this case, the beam group pair reported by the beam group can be referred to, and the two TCI states supporting simultaneous transmission using multiple panels indicated by one code point can be reported from the terminal via the beam group pair. In the above description, for the sake of ease of description, the indication of two TCI states has been described. However, for the use of N UL,panel The simultaneous transmission of multiple panels (more than 2) can be indicated by a code point N UL,panel Instead of indicating two TCI states by one code point, the base station may configure the same CSI resource for each CSI resource set in the same group via high-level configuration, and may also consider receiving the same CSI resource by using different panels. This may be used as a method in which a single TRP may be considered to be transmitted or received simultaneously via multiple panels.

[0718] In another example, when reporting a beam to a base station, the terminal may perform reporting by configuring the panel information of the reported beam as additional CSI information. For example, when the maximum number of panels that the terminal can support is defined as N panel The terminal can add a log to each reported CRI or SSBRI 2 N panel The panel information may be notified to the base station by a bit. This may be defined as a "panel index" or may be configured by other types of CSI report information that support implicit indication rather than explicit indication as panel information.

[0719] For example, if the number of resources in the CSI resource set associated with the CSI report is 8, and a CSI-RS resource with a CRI corresponding to 0, 1, 2, or 3 is received via the first panel of two panels operable by the terminal, the terminal can perform a report by configuring an additional bit as "0" and the CRI and the corresponding RSRP (or the signal interference plus noise ratio (SINR) or any channel measurement information may be applicable). That is, the terminal can report to the base station that reception has been performed via the first panel of the two panels. Similarly, if a CSI-RS resource with a CRI corresponding to 4, 5, 6, or 7 is received via the second panel of the two panels operable by the terminal, the terminal can perform a report by configuring an additional bit as "1" and the CRI and the corresponding RSRP (or SINR or any channel measurement information may be applicable). Therefore, when additional information is added to the CSI report, the base station can configure a beam combination that supports simultaneous transmission using multiple panels based on the reported beam information and the corresponding panel information, and the base station can transmit a MAC CE for configuring multiple TCI states of one code point to the terminal via the beam combination.

[0720] The terminal can receive a MAC CE from the base station and activate the TCI state, and ultimately indicate a code point via DCI format 1_1 or DCI format 1_2, and this can be applied to UL transmission starting from the BAT time. Even in the case where panel information is added in this way, the base station can configure the same CSI resources for each CSI resource set in the same group via high-level configuration, and can also consider receiving the same CSI resources by using different panels. Therefore, even when the same CSI resources are configured for different resource sets in the group, the terminal can similarly report the corresponding CRI and the corresponding RSRP (or SINR or any channel measurement information may be applicable) as well as the panel information (given by log) to the base station. 2 N panel bit configuration, as described above).

[0721] In the second embodiment, the terminal may report beam information to the base station, and based on this, the base station may configure high-level parameters for supporting simultaneous transmission using multiple panels, and may transmit a MAC CE to the terminal to activate the TCI state. In this case, for the MAC CE transmitted from the base station to the terminal, the above-mentioned first embodiment may be used. Figure 25 to Figure 27 1 is a MAC CE for indicating multiple TCI states based on a unified TCI. Alternatively, in order to indicate multiple TCI states through one code point, the following can be used: Fig.29 or Fig.30As shown, the MAC CE is configured to activate multiple TCI states for supporting simultaneous transmission of multiple panels in one code point. The multiple TCI states activated in one code point via the MAC CE as described above may be multiple TCI states that can use multiple panels for simultaneous transmission, and may be multiple TCI states that do not support simultaneous transmission using multiple panels. The former and the latter may be identified and configured by the base station via a group-based beam report transmitted from the terminal to the base station, and the terminal and the base station may implicitly recognize or identify via the received group-based beam report whether the multiple TCI states are a TCI state combination that can be used for simultaneous transmission using multiple panels or a TCI state combination that cannot be used for simultaneous transmission using multiple panels.

[0722] Alternatively, an indicator indicating simultaneous transmission of multiple panels can be added to each code point by using an unused field of a reserved area (R area). Alternatively, a new eight-bit byte (8 bits) indicating that a reserved area corresponding to the total number of code points cannot be guaranteed can be used to newly add an indicator area for indicating simultaneous transmission of multiple panels. For example, if there are a total of 8 code points, the additional bit indicating simultaneous transmission of multiple panels can include a total of 8 bits, and the MAC CE can be configured using a reserved area or by adding a new eight-bit byte. In this case, when the MSB is configured to 1 and indicates multiple (e.g., two) TCI states for the first code point, the TCI state can be activated to perform simultaneous UL transmission using multiple panels based on multiple TCI states. Alternatively, when the MSB is configured to 0 and indicates multiple (e.g., two) TCI states for the first code point, it can be indicated that simultaneous UL transmission using multiple panels cannot be performed based on multiple TCI states. Therefore, if simultaneous transmission using multiple panels is not performed, the multiple TCI states indicated by the code point can support multi-TRP transmission based on TDM.

[0723] Fourth embodiment: SRS configuration method for simultaneous PUSCH transmission based on codebook using multiple panels

[0724] When simultaneous UL transmission using multiple panels can be achieved according to the capabilities of the terminal, the terminal can configure the corresponding UE capabilities that can be supported and report it to the base station. For example, the UE capability reporting parameter reported by the terminal to the base station may be "simulTx-PUCCH-PUSCH", and the terminal may configure the value of the parameter to "support", "enable", etc., so as to report that simultaneous PUCCH or PUSCH transmission using multiple panels is possible. In this case, the terminal can use multiple panels to simultaneously perform multiple PUCCH transmissions or repeated PUCCH transmissions, or simultaneously perform multiple PUSCH transmissions or repeated PUSCH transmissions. However, simultaneous PUCCH and PUSCH transmissions using multiple panels may not be supported. The UE capability reporting parameter "simulTx-PUCCH-PUSCH" reported by the terminal to the base station is only an example, and the terminal can report to the base station that simultaneous UL transmission using multiple panels is possible via parameters with different names that implement similar or identical UE capability reports.

[0725] The base station may then configure high-level parameters for supporting the terminal, and the configured high-level parameters may include high-level parameters for simultaneous UL transmission using multiple panels. If the base station configures the high-level parameters for simultaneous UL transmission using multiple panels for the terminal, the base station may configure an SRS resource set for PUSCH transmission. In this case, if multiple panels are used to support codebook-based PUSCH, an SRS resource set may be configured for the terminal, wherein the "usage" of the SRS resource set is configured as "codebook". One or more SRS resource sets may be configured, wherein the "usage" of codebook-based simultaneous PUSCH transmission using multiple panels is "codebook". The configuration of multiple SRS resource sets where "usage" is "codebook" may indicate that the UL signal may be transmitted to multiple TRPs according to the relationship between as many TCI states as the number of configured SRS resource sets described later. For example, if two SRS resource sets where "usage" is "codebook" are configured for the terminal by the base station, this may indicate that the terminal may transmit UL signals to a maximum of two TRPs.

[0726] Here, a description is provided based on a method of transmitting a UL signal to two TRPs simultaneously, but the described method can be extended so that the UL signal can be transmitted to more than two TRPs simultaneously. When the base station configures multiple SRS resource sets in which "usage" is "codebook", one or more SRS resources can be configured in each SRS resource set. When configuring high-level parameters for SRS resource sets for the terminal, the base station can additionally configure "followUnifiedTCTstate-r17". If "followUnifiedTCTstate-r17" is configured in the SRS resource set, the terminal can transmit the SRS resources in the SRS resource set according to the spatial relationship of the reference RS (e.g., SRS) or the RS used to determine the UL transmit spatial filter (e.g., CSI-RS or SSB), where the "qcl-Type" in the "QCL-Info" is configured as typeD, such as the indicated "DLorJoint-TCIstate-r17" (or if the high-level parameter "unifiedTCI-StatType" is configured as "joint", it is "TCI-State") or "UL-TCIstate" (or if the high-level parameter "unifiedTCI-StatType" is configured as "separate", it is "TCI-UL-State"). In this case, the reference RS indicated by DLorJoint-TCIstate-r17 can be a CSI-RS in an NZP-CSI-RS-ResourceSet configured with a high-level parameter repetition, or a CSI-RS in an NZP-CSI-RS-ResourceSet configured with a high-level parameter trs-Info. Alternatively, the reference RS indicated by "UL-TCIstate" can be a CSI-RS in an NZP-CSI-RS-ResourceSet configured with a high-level parameter repetition, a CSI-RS in an NZP-CSI-RS-ResourceSet configured with a high-level parameter trs-Info, an SRS resource whose "usage" is configured as "beamManagement", or an SSB associated with a PCI that is the same as or different from the PCI of the serving cell.

[0727] Here, it is assumed that a high-level parameter "followUnifiedTCTstate-r17" is configured in the configured multiple SRS resource sets, and SRS resources are transmitted according to a spatial relationship determined by referring to a TCI state indicated by DCI (e.g., DLorJoint-TCIstate-r17 or UL-TCIstate).

[0728] As described in the third embodiment, in order to support simultaneous UL transmission using multiple panels, if the terminal receives a MAC CE for activating multiple TCI states from the base station, and indicates a code point including multiple (e.g., N) TCI states via DCI, etc., the first SRS resource set in the multiple SRS resource sets can be associated with the first TCI state in the indicated N TCI states. That is, the terminal can transmit all SRS resources in the first SRS resource set according to the spatial relationship determined with reference to the first TCI state in the indicated N TCI states. For example, the first SRS resource set refers to the SRS resource set with the smallest SRS-ResourceSetId value in the multiple SRS resource sets in which "usage" is configured as "codebook" (in the fourth and fifth embodiments, it refers to the SRS resource set in which "usage" is "codebook"). For another example, the second SRS resource set in the multiple SRS resource sets can be associated with the second TCI state in the indicated N TCI states. That is, the terminal can transmit all SRS resources in the second SRS resource set according to the spatial relationship determined with reference to the second TCI state in the indicated N TCI states. Similarly, even for more than two SRS resource sets and TCI states, the terminal can transmit all SRS resources included in the nth SRS resource set according to the spatial relationship determined by referring to the nth TCI state. In this case, if a plurality of SRS resources are included in one SRS resource set, each of the SRS resources can be associated with a panel according to the following method. When the terminal reports via a UE capability report that the terminal is capable of performing simultaneous UL transmission using multiple panels, and the base station configures high-layer parameters for simultaneous UL transmission using multiple panels in consideration of this, an association relationship between the SRS resources and the above-mentioned panels can be established.

[0729] Association 1-Each SRS resource included in the SRS resource set can be associated with a panel supported by the terminal. For example, the first SRS resource in the first SRS resource set can be associated with the first panel in the panel supported by the terminal (if the panel information is implicitly configured and indicated, the order between the panels in the multiple panels can be determined by the implementation of the terminal. For another example, if the panel information is explicitly configured and indicated, the first panel can be determined by the lowest panel indicator. Then the second panel, the third panel, etc. can be defined similarly). The second SRS resource in the first SRS resource set can be associated with the second panel in the panel supported by the terminal. The configuration method described is only an example, and a number of SRS resources other than two SRS resources can be configured in one SRS resource set, and each SRS resource can be associated with any panel supported by the terminal. However, the association relationship should be configured to allow the base station and the terminal to have the same understanding, and the method for defining the association relationship between the SRS resource and the panel supported by the terminal can be considered in the order in the above example. The above-mentioned group-based beam reporting information can be used so that the base station and the terminal have the same understanding of the association relationship between the SRS resource and the panel. Alternatively, the configuration may be performed explicitly by adding information about the panels supported by the terminal to the SRS resource configured via the high-level parameters. For example, a high-level parameter such as "panel_Index" may be added to the high-level parameter SRS-Resource, and the panel may be incremented from 0 to N. panel A value of -1 is used to indicate this.

[0730] Fig.31 A case where two SRS resources are included in each of two SRS resource sets in a wireless communication system according to an embodiment and a terminal supports simultaneous UL transmission using two panels is shown.

[0731] refer to Fig.31 , the code point indicated by the TCI field of the DCI 3101 received by the terminal from the base station indicates two TCI states 3102 and 3103 for simultaneous transmission using multiple panels. In this case, the first TCI state 3102 can be used to determine the spatial relationship of the SRS resources 3111 and 3112 for transmitting the first SRS resource set 3110. The second TCI state 3103 can be used to determine the spatial relationship of the SRS resources 3121 and 3122 for transmitting the second SRS resource set 3120. The first panel 3131 of the terminal can be implicitly or explicitly associated with the first SRS resource 3111 in the first SRS resource set 3110.

[0732] In the case where the first TCI state 3102 includes an RS transmitted from a first TRP among a plurality of TRPs as a reference RS, the terminal may understand or recognize that a first SRS resource 3111 in a first SRS resource set 3110 is configured to be transmitted to the first TRP by using a first panel 3131 of the terminal. The first panel 3131 may also be implicitly or explicitly associated with a first SRS resource 3121 in a second SRS resource set 3120. In the case where the second TCI state 3103 includes an RS transmitted from a second TRP among a plurality of TRPs as a reference RS, the terminal may understand that a first SRS resource 3111 in a first SRS resource set 3110 is configured to be transmitted to a second TRP by using the first panel 3131 of the terminal. The second panel 3132 of the terminal may be implicitly or explicitly associated with a second SRS resource 3112 in the first SRS resource set 3110.

[0733] In the case where the first TCI state 3102 includes an RS transmitted from a first TRP among a plurality of TRPs as a reference RS, the terminal may understand that a first SRS resource 3111 in a first SRS resource set 3110 is configured to be transmitted to the first TRP by using a second panel 3132 of the terminal. The second panel 3132 may also be implicitly or explicitly associated with a second SRS resource 3122 in a second SRS resource set 3120.

[0734] In the case where the second TCI state 3103 includes an RS transmitted from a second TRP among multiple TRPs as a reference RS, the terminal can understand that the second SRS resource 3122 in the second SRS resource set 3120 is configured to be transmitted to the second TRP by using the second panel 3132 of the terminal. Fig.31 The case where the number of SRS ports of the SRS resources included in each SRS resource set is 2 is shown.

[0735] -Association relationship 2-The SRS resources included in the SRS resource set can be associated with one panel or multiple panels. For example, the first SRS resource in the first SRS resource set can be associated with the first panel (or the second panel) in the panel supported by the terminal, and the second SRS resource in the first SRS resource set can be associated with the first panel and the second panel in the panel supported by the terminal. As another example, the first SRS resource in the second SRS resource set can be associated with the second panel (or the first panel) in the panel supported by the terminal, and the second SRS resource in the second SRS resource set can be associated with the first panel and the second panel in the panel supported by the terminal. This configuration method is only an example, and a number of SRS resources other than two SRS resources can be configured in one SRS resource set, and each SRS resource can be associated with any panel supported by the terminal. Alternatively, the first SRS resource in the SRS resource set can be associated with multiple panels. However, as in association relationship 1, association relationship 2 should also be configured to allow the base station and the terminal to have the same understanding, and the above example can be regarded as a method of defining the association relationship between the SRS resource and the panel supported by the terminal. The above-mentioned group-based beam reporting information can be used so that the base station and the terminal have the same understanding of the association relationship between the SRS resource and the panel. Alternatively, the configuration can be performed explicitly by adding information about the panels supported by the terminal to the SRS resource configured via the high-level parameters. For example, a high-level parameter (such as "panel_Index") can be added to the high-level parameter SRS-Resource, and the panel index can be set from 0 to N. panel Alternatively, for a panel associated with a corresponding SRS resource, "panel_Index" may be configured as 1 by using a bitmap format, and an unassociated panel may be indicated as 0 for configuration via a high-level parameter. In this case, "panel_Index" may include N panel Alternatively, the panel_Index can be The bits are configured so that all combinations of supported panels can be considered.

[0736] Fig.32 A case is shown in which two SRS resource sets in an embodiment of a wireless communication system include two SRS resources each and a terminal can support simultaneous UL transmission using two panels.

[0737] The code point indicated by the TCI field of the DCI 3201 received by the terminal from the base station indicates two TCI states 3202 and 3203 for simultaneous transmission using multiple panels. For example, the first TCI state 3202 can be used to determine the spatial relationship of SRS resources 3211 and 3212 for transmitting the first SRS resource set 3210. For example, the second TCI state 3203 can be used to determine the spatial relationship of SRS resources 3221 and 3222 for transmitting the second SRS resource set 3220. The first panel 3231 of the terminal can be implicitly or explicitly associated with the first SRS resource 3211 in the first SRS resource set 3210. In the case where the first TCI state includes an RS transmitted from a first TRP among multiple TRPs as a reference RS, the terminal can understand that the first SRS resource 3211 in the first SRS resource set 3210 is configured to be transmitted to the first TRP by using the first panel 3231 of the terminal. In this case, the number of SRS ports configured in the first SRS resource 3211 in the first SRS resource set 3210 may be equal to 2. The second panel 3232 of the terminal may also be implicitly or explicitly associated with the first SRS resource 3221 in the second SRS resource set 3220. In the case where the second TCI state 3203 includes an RS transmitted from a second TRP among a plurality of TRPs as a reference RS, the terminal may understand that the first SRS resource 3221 in the second SRS resource set 3220 is configured to be transmitted to the second TRP by using the second panel 3232 of the terminal. In this case, the number of SRS ports configured in the first SRS resource 3221 in the second SRS resource set 3220 may be equal to 2.

[0738] The second SRS resource 3212 configured in the first SRS resource set 3210 may be implicitly or explicitly associated with the first panel 3231 and the second panel 3232, both of which are panels supported by the terminal. If the first TCI state includes an RS transmitted from the first TRP of the plurality of TRPs as a reference RS, it can be understood that the second SRS resource 3212 in the first SRS resource set 3210 is configured to be transmitted to the first TRP by using the first panel 3231 and the second panel 3232, both of which are panels of the terminal. In this case, the number of SRS ports configured in the second SRS resource 3212 in the first SRS resource set 3210 may be equal to 4, which is the number supportable using two panels. The first two SRS ports may be associated with the first panel 3231, and the remaining subsequent two SRS ports may be associated with the second panel 3232.

[0739] The relationship between the SRS port and the multiple panels can be implicitly associated in sequence, or can be explicitly indicated via a new high-level parameter. For example, panel_Index as many as the number of SRS ports for SRS resources can be configured in the form of a sequence. The second SRS resource 3222 configured in the second SRS resource set 3220 can be implicitly or explicitly associated with the first panel 3231 and the second panel 3232, both of which are panels supported by the terminal. If the second TCI state includes an RS transmitted from the second TRP of the multiple TRPs as a reference RS, it can be understood that the second SRS resource 3222 in the second SRS resource set 3220 is configured to be transmitted to the second TRP by using the first panel 3231 and the second panel 3232, both of which are panels of the terminal. In this case, the number of SRS ports configured in the second SRS resource 3222 in the second SRS resource set 3220 can be equal to 4, which is the number that can be supported using two panels. As with the second SRS resource 3212 in the first SRS resource set 3210, an implicit or explicit association relationship may be configured between the SRS port and a panel supported by the terminal.

[0740] The above details have been specifically provided assuming that the SRS resources are transmitted based on the indicated TCT state. However, even if "followUnifiedTCTstate-r17" is not configured, simultaneous transmission using multiple panels can be supported by applying the above method based on the spatial relationship information configured in the SRS resources in each SRS resource set. In this case, the above-mentioned first TCI state can be replaced by spatialRelationInfo configured via high-level parameters for the SRS resources in the first SRS resource set, and the second TCI state can also be replaced by spatialRelationInfo configured via high-level parameters for the SRS resources in the second SRS resource set.

[0741] Fifth embodiment: Method for indicating precoding and SRS resources for simultaneous PUSCH transmission based on codebook using multiple panels, and method for simultaneously transmitting UL data channels

[0742] In a fifth embodiment, a description is provided of a method for indicating precoding in DCI (e.g., precoding information and layer number fields in the DCI, and a transport precoding matrix indicator, hereinafter referred to as TPMI) and an SRS resource indicator (hereinafter referred to as SRI) so as to perform codebook-based simultaneous PUSCH transmission based on the SRS resource set configuration described in the fourth embodiment above, and a method for performing codebook-based simultaneous PUSCH transmission using multiple panels by applying the indicated SRI and TPMI to the scheduled PUSCH resources.

[0743] A description of a specific example of configuration that can be performed on the relationship between multiple TCI states and multiple SRS resource sets and the implicit or explicit association relationship between multiple SRS sources included in the SRS resource set and multiple panels supported by the terminal according to the association relationship 1 or the association relationship 2 in the fourth embodiment. In a fifth embodiment, by referring to the example described in detail in the fourth embodiment, a description of a method for applying SRI and TPMI for SRS resource sets and SRS resource indications configured for each of [association relationship 1] or [association relationship 2] according to the SRS resource set indicator field included in the DCI is provided.

[0744] Fig.33 Before describing the method of applying SRI and TPMI according to the value indicated in the SRS resource set indicator field, an example of a simultaneous transmission method using multiple panels is shown. Specifically, Fig.33 The transmission panel and resource allocation for UL transmission in FDM, SDM and SFN schemes for supporting STxMP in a wireless communication system according to an embodiment are shown. For ease of description, PUSCH has been described as an example, but this is only an example, and the content proposed below can be similarly applied to PUCCH, SRS or other UL channels.

[0745] FDM scheme A 3300 is a scheme that configures all resources of a scheduled PUSCH into one TB and encodes information bits based thereon. Thereafter, according to the FDM scheme, the resources can be divided into two halves in the frequency domain so as to be transmitted simultaneously at the same time point by using the corresponding panel. For example, the terminal can transmit the first part of all PUSCH resources (including the part of the low-index RB) 3301 via the first panel, and can transmit the second part of all PUSCH resources (except the first part) 3302 via the second panel. This is only an example, and the corresponding parts can be mapped to the panel so as to be transmitted in a different order from that in the example (for example, the first part of all PUSCH resources can be transmitted via the second panel, and the second part of all PUSH resources can be transmitted via the first panel). In this case, if a TB is divided into two halves and transmitted via the corresponding panel, and the transmission is performed to different TRPs by using the corresponding panel, a part of a TB is received in one TRP. Thereafter, according to the implementation of the base station, the base station can collect these parts into one and perform joint decoding or separate decoding, thereby receiving the signal transmitted by the terminal. In FDM scheme A 3300, DMRS may be transmitted on all PUSCH resources 3305. Alternatively, DMRS may be transmitted on corresponding PUSCH portions transmitted to different TRPs, where different DMRS ports may be configured or different DMRS sequences may be used for DMRS transmitted to different TRPs.

[0746] FDM scheme B 3310 is a scheme that first divides the resources of a scheduled PUSCH into two halves in the frequency domain according to the FDM scheme, configures the corresponding divided PUSCH resources transmitted using the corresponding panel as a TB, and then encodes the information bit. Thereafter, the terminal transmits the same TB via the corresponding panel. In this case, the TB transmitted via the corresponding panel may have the same RV sequence, or may have different RV sequences. Since the result is obtained by rate matching according to each RV sequence in a buffer of coded bits encoded via one TB, the FDM scheme 3310 may be referred to as repeated transmission. For example, the terminal may transmit 3311 a first repeated transmission part via a first panel, and transmit 3312 a second repeated transmission part via a second panel. In this case, if the repeatedly transmitted TB is transmitted via the corresponding panel, and the transmission is performed to different TRPs using the corresponding panel, the repeatedly transmitted TB is received in one TRP. Thereafter, according to the implementation, the base station may collect these parts into one and perform joint decoding or separate decoding, thereby receiving the signal transmitted by the terminal.

[0747] In FDM scheme B 3310, DMRS may be transmitted on all PUSCH resources 3315. Alternatively, DMRS may be transmitted on corresponding PUSCH portions transmitted to different TRs, where for DMRS transmitted to different TRs, different DMRS ports may be configured or different DMRS sequences may be used.

[0748] The SDM scheme 3320 may be cited as a scheme for configuring all resources of a scheduled PUSCH into one TB and encoding information bits based on this in consideration of the total number of layers. Thereafter, according to the SDM scheme, the terminal may divide the resources into two halves in the spatial domain so as to transmit the resources simultaneously at the same time point by using the corresponding panel. That is, the terminal divides different layers and transmits via the corresponding panel. For example, the terminal may transmit the first part (e.g., a part including a layer with a low index) 3321 via the first panel, and may transmit the second part (a part other than the first part) 3322 via the second panel. This is only an example, and the corresponding parts may be mapped to the panel so as to be transmitted in a different order from that in the example (e.g., the first part may be transmitted via the second panel, and the second part may be transmitted via the first panel). For the DMRS 3325 of the PUSCH transmitted via the corresponding panel, different DMRS ports may be configured, and different DMR ports may be included in different CDM groups. Alternatively, the DMRS may be included in the same CDM group with different DMRS ports. In this case, if one TB is divided into two halves and transmitted via corresponding panels, and transmission is performed to different TRPs by using the corresponding panels, a part of one TB is received in one TRP. Thereafter, depending on the implementation of the base station, the base station can collect the parts into one and perform joint decoding or separate decoding, thereby receiving the signal transmitted by the terminal.

[0749] The SFN scheme 3330 may be cited as a scheme for performing transmission by configuring the same DMRS and exactly the same TB in the same frequency resources and the same time resources. The PUSCH transmitted via the corresponding panel may include the same data and the same DMRS. That is, the terminal may transmit the first part 3331 via the first panel and transmit the second part 3332 via the second panel. This is only an example, and the corresponding parts may be mapped to the panels so as to be transmitted in a different order from that in the example (for example, the first part may be transmitted via the second panel, and the second part may be transmitted via the first panel). In this case, if the same TB is transmitted via the corresponding panel, and the TB is transmitted to different TRPs using the corresponding panel, the same TB is received in one TRP. Thereafter, depending on the implementation, the base station may collect these parts into one and perform joint decoding or separate decoding, thereby receiving the signal transmitted by the terminal. In the SFN scheme 3330, the DMRS transmitted via the corresponding panel may be configured with the same DMRS port 3335.

[0750] In addition to the above Fig.32 In addition to the transmission method described in, repeated transmission for transmitting the same TB based on the SDM scheme can also be supported. That is, according to the embodiment, any scheme that can perform simultaneous transmission in the time domain by using different panels can follow the UCI multiplexing method. [...

Claims

1. A method performed by a user equipment UE in a wireless communication system, the method comprising: Receive downlink control information DCI from a base station, the DCI including a sounding reference signal resource set indicator SRSI, two sounding reference signal resource indicator SRI fields and two transmission precoding matrix indicator TPMI fields; as well as transmitting a physical uplink shared channel PUSCH to the base station based on the DCI, wherein, in a case where the SRSI includes a first value associated with a first SRS resource set, the PUSCH is transmitted based on a first SRI field of the two SRI fields and a first TPMI field of the two TPMI fields associated with the first SRS resource set, and Wherein, when the SRSI includes a second value associated with a second SRS resource set, the PUSCH is transmitted based on the first SRI field of the two SRI fields and the first TPMI field of the two TPMI fields associated with the second SRS resource set.

2. The method according to claim 1, wherein: In a case where the SRSI includes the first value or the second value, a second SRI field of the two SRI fields and a second TPMI field of the two TPMI fields are not used for the PUSCH.

3. The method according to claim 1, wherein: In a case where the SRSI includes a third value associated with the first SRS resource set and the second SRS resource set: transmitting a first PUSCH based on the first SRI field and the first TPMI field associated with the first SRS resource set, and A second PUSCH is transmitted based on a second SRI field of the two SRI fields and a second TPMI field of the two TPMI fields associated with the second SRS resource set.

4. The method according to claim 3, wherein: Each of the first value and the second value corresponds to a single transmit-receive point s-TRP transmission, wherein the third value corresponds to a spatial division multiplexing SDM of simultaneously transmitting STxMP across multiple panels, and The method further includes receiving radio resource control RRC signaling from the base station for switching between the SDM of the STxMP and time division multiplexing TDM of multiple transmit and receive points m-TRP.

5. A user equipment UE in a wireless communication system, the UE comprising: Transceiver; as well as A controller is coupled to the transceiver and is configured to: Receive downlink control information DCI from a base station, the DCI including a sounding reference signal resource set indicator SRSI, two sounding reference signal resource indicator SRI fields and two transmission precoding matrix indicator TPMI fields; as well as transmitting a physical uplink shared channel PUSCH to the base station based on the DCI, wherein, in a case where the SRSI includes a first value associated with a first SRS resource set, the PUSCH is transmitted based on a first SRI field of the two SRI fields and a first TPMI field of the two TPMI fields associated with the first SRS resource set, and Wherein, when the SRSI includes a second value associated with a second SRS resource set, the PUSCH is transmitted based on the first SRI field of the two SRI fields and the first TPMI field of the two TPMI fields associated with the second SRS resource set.

6. The UE according to claim 5, wherein: In a case where the SRSI includes the first value or the second value, a second SRI field of the two SRI fields and a second TPMI field of the two TPMI fields are not used for the PUSCH.

7. The UE according to claim 5, wherein: In a case where the SRSI includes a third value associated with the first SRS resource set and the second SRS resource set: transmitting a first PUSCH based on the first SRI field and the first TPMI field associated with the first SRS resource set, and A second PUSCH is transmitted based on a second SRI field of the two SRI fields and a second TPMI field of the two TPMI fields associated with the second SRS resource set.

8. The UE according to claim 7, wherein: Each of the first value and the second value corresponds to a single transmit-receive point s-TRP transmission, wherein the third value corresponds to a spatial division multiplexing SDM of simultaneously transmitting STxMP across multiple panels, and The controller is further configured to receive radio resource control RRC signaling from the base station for switching between the SDM of the STxMP and time division multiplexing TDM of multiple transmission and reception points m-TRP.

9. A method performed by a base station in a wireless communication system, the method comprising: Transmitting downlink control information DCI to a user equipment UE, wherein the DCI includes a sounding reference signal resource set indicator SRSI, two sounding reference signal resource indicator SRI fields, and two transmission precoding matrix indicator TPMI fields; as well as receiving a physical uplink shared channel (PUSCH) based on the DCI from the UE, wherein, in a case where the SRSI includes a first value associated with a first SRS resource set, the PUSCH is received based on a first SRI field of the two SRI fields and a first TPMI field of the two TPMI fields associated with the first SRS resource set, and Wherein, when the SRSI includes a second value associated with a second SRS resource set, the PUSCH is received based on the first SRI field of the two SRI fields and the first TPMI field of the two TPMI fields associated with the second SRS resource set.

10. The method according to claim 9, wherein: In a case where the SRSI includes the first value or the second value, a second SRI field of the two SRI fields and a second TPMI field of the two TPMI fields are not used for the PUSCH.

11. The method according to claim 9, wherein: In a case where the SRSI includes a third value associated with the first SRS resource set and the second SRS resource set: receiving a first PUSCH based on the first SRI field and the first TPMI field associated with the first SRS resource set, and A second PUSCH is received based on a second SRI field of the two SRI fields and a second TPMI field of the two TPMI fields associated with the second SRS resource set.

12. The method according to claim 11, wherein: Each of the first value and the second value corresponds to a single transmit-receive point s-TRP transmission, wherein the third value corresponds to a spatial division multiplexing SDM of simultaneously transmitting STxMP across multiple panels, and The method further includes transmitting a radio resource control RRC signaling to the UE for switching between the SDM of the STxMP and the time division multiplexing TDM of multiple transmit and receive points m-TRP.

13. A base station in a wireless communication system, the base station comprising: Transceiver; as well as A controller is coupled to the transceiver and is configured to: Transmitting downlink control information DCI to a user equipment UE, wherein the DCI includes a sounding reference signal resource set indicator SRSI, two sounding reference signal resource indicator SRI fields, and two transmission precoding matrix indicator TPMI fields; as well as receiving a physical uplink shared channel (PUSCH) based on the DCI from the UE, wherein, in a case where the SRSI includes a first value associated with a first SRS resource set, the PUSCH is received based on a first SRI field of the two SRI fields and a first TPMI field of the two TPMI fields associated with the first SRS resource set, and Wherein, when the SRSI includes a second value associated with a second SRS resource set, the PUSCH is received based on the first SRI field of the two SRI fields and the first TPMI field of the two TPMI fields associated with the second SRS resource set.

14. The base station according to claim 13, wherein: In a case where the SRSI includes the first value or the second value, a second SRI field of the two SRI fields and a second TPMI field of the two TPMI fields are not used for the PUSCH, and Wherein, in a case where the SRSI includes a third value associated with the first SRS resource set and the second SRS resource set: receiving a first PUSCH based on the first SRI field and the first TPMI field associated with the first SRS resource set, and A second PUSCH is received based on the second SRI field of the two SRI fields and the second TPMI field of the two TPMI fields associated with the second SRS resource set.

15. The base station according to claim 14, wherein: Each of the first value and the second value corresponds to a single transmit-receive point s-TRP transmission, wherein the third value corresponds to a spatial division multiplexing SDM of simultaneously transmitting STxMP across multiple panels, and The controller is further configured to transmit a radio resource control RRC signaling to the UE for switching between the SDM of the STxMP and the time division multiplexing TDM of multiple transmission and reception points m-TRP.

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