Method and device for determining uplink transmission interval in wireless communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates. A method of a terminal in a communication system, according to one embodiment of the present disclosure, comprises the steps of: receiving, from a base station, configuration information including information about at least one sounding reference signal (SRS) resource; determining the transmission power of an SRS on the basis of the configuration information; and transmitting the SRS to the base station on the basis of the transmission power, wherein, with respect to SRS resources in which a slot index, a first symbol in a slot and the number of consecutive symbols are the same, the transmission power is determined for each SRS resource.

Description

Method and device for determining uplink transmission interval in a wireless communication system

[0001] The present disclosure relates to the operation of a terminal and a base station in a wireless communication system. Specifically, the present disclosure relates to a method for determining a transmission interval for transmitting an uplink channel and a device capable of performing the method.

[0002] 5G mobile communication technology defines a wide frequency band to enable fast transmission speeds and new services, and can be implemented not only in the sub-6GHz frequency band such as 3.5 gigahertz (3.5GHz), but also in the ultra-high frequency band called millimeter wave (mmWave) such as 28GHz and 39GHz ('Above 6GHz'). In addition, for 6G mobile communication technology, which is called the system after 5G communication (Beyond 5G), implementation in the terahertz band (for example, the 3 terahertz (3THz) band at 95GHz) is being considered to achieve a transmission speed that is 50 times faster than 5G mobile communication technology and an ultra-low latency time that is reduced to one-tenth.

[0003] In the early stages of 5G mobile communication technology, the goal is to support services and satisfy performance requirements for enhanced Mobile Broadband (eMBB), Ultra-Reliable Low-Latency Communications (URLLC), and massive Machine-Type Communications (mMTC). These include beamforming and massive MIMO to mitigate path loss of radio waves in ultra-high frequency bands and increase the transmission distance of radio waves, support for various numerologies (such as operation of multiple subcarrier intervals) and dynamic operation of slot formats for efficient use of ultra-high frequency resources, initial access technology to support multi-beam transmission and wideband, definition and operation of BWP (Bidth Part), new channel coding methods such as LDPC (Low Density Parity Check) codes for large-capacity data transmission and Polar Code for reliable transmission of control information, and L2 pre-processing (L2). Standardization has been made for network slicing, which provides dedicated networks specialized for specific services, and pre-processing.

[0004] Currently, discussions are underway to improve and enhance the initial 5G mobile communication technology in consideration of the services that 5G mobile communication technology was intended to support, and physical layer standardization is in progress for technologies such as V2X (Vehicle-to-Everything) to help autonomous vehicles make driving decisions and increase user convenience based on their own location and status information transmitted by vehicles, NR-U (New Radio Unlicensed) for the purpose of system operation that complies with various regulatory requirements in unlicensed bands, NR terminal low power consumption technology (UE Power Saving), Non-Terrestrial Network (NTN), which is direct terminal-satellite communication to secure coverage in areas where communication with terrestrial networks is impossible, and Positioning.

[0005] In addition, standardization of wireless interface architecture / protocols is in progress for technologies such as intelligent factories (Industrial Internet of Things, IIoT) to support new services through linkage and convergence with other industries, Integrated Access and Backhaul (IAB) that provides nodes for expanding network service areas by integrating wireless backhaul links and access links, Mobility Enhancement technology including Conditional Handover and Dual Active Protocol Stack (DAPS) handover, and 2-step random access (2-step RACH for NR) that simplifies random access procedures. Standardization is also in progress for system architecture / services such as 5G baseline architecture (e.g., Service-based Architecture, Service-based Interface) for grafting Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC) that provides services based on the location of the terminal.

[0006] Once these 5G mobile communication systems are commercialized, an explosive increase in connected devices will be connected to the communication network, necessitating enhanced functionality and performance of 5G mobile communication systems and integrated operation of these connected devices. To this end, new research will be conducted on improving 5G performance and reducing complexity, supporting AI services, supporting metaverse services, and drone communications by utilizing eXtended Reality (XR), Artificial Intelligence (AI), and Machine Learning (ML) to efficiently support Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR).

[0007] In addition, the development of these 5G mobile communication systems includes new waveforms to ensure coverage in the terahertz band of 6G mobile communication technology, multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), Array Antenna, and Large Scale Antenna, metamaterial-based lenses and antennas to improve the coverage of terahertz band signals, high-dimensional spatial multiplexing technology using Orbital Angular Momentum (OAM), Reconfigurable Intelligent Surface (RIS) technology, as well as full duplex technology to improve the frequency efficiency and system network of 6G mobile communication technology, satellite, AI (Artificial Intelligence) from the design stage and AI-based communication technology that realizes system optimization by internalizing end-to-end AI support functions, and ultra-high-performance communication and computing resources to provide services with complexity that exceeds the limits of terminal computing capabilities. It can serve as a basis for the development of next-generation distributed computing technologies that can be realized by utilizing them.

[0008] The disclosed embodiment seeks to provide a device and method capable of effectively providing a service in a mobile communication system.

[0009] A method of a terminal of a communication system according to one embodiment of the present disclosure comprises the steps of: receiving configuration information including information on at least one sounding reference signal (SRS) resource from a base station; determining transmission power of an SRS based on the configuration information; and transmitting the SRS to the base station based on the transmission power, wherein for SRS resources having the same slot index, first symbol in a slot, and number of consecutive symbols, the transmission power may be determined for each SRS resource.

[0010] A method of a base station of a communication system according to one embodiment of the present disclosure comprises the steps of: transmitting configuration information including information on at least one sounding reference signal (SRS) resource to a terminal; and receiving an SRS from the terminal based on transmission power of the SRS determined based on the configuration information, wherein for SRS resources having the same slot index, first symbol in the slot, and number of consecutive symbols, the transmission power may be determined for each SRS resource.

[0011] A terminal of a communication system according to one embodiment of the present disclosure includes a transceiver; and a control unit configured to receive configuration information including information on at least one sounding reference signal (SRS) resource from a base station, determine transmission power of an SRS based on the configuration information, and transmit the SRS to the base station based on the transmission power, wherein for SRS resources having the same slot index, first symbol in the slot, and number of consecutive symbols, the transmission power may be determined for each SRS resource.

[0012] A base station of a communication system according to one embodiment of the present disclosure includes a transceiver; and a control unit configured to transmit configuration information including information on at least one sounding reference signal (SRS) resource to a terminal, and receive the SRS from the terminal based on transmission power determined based on the configuration information, wherein for SRS resources having the same slot index, first symbol in the slot, and number of consecutive symbols, the transmission power may be determined for each SRS resource.

[0013] The disclosed embodiment provides a device and method capable of effectively providing a service in a mobile communication system.

[0014] FIG. 1 is a diagram illustrating a basic structure of a time-frequency domain in a wireless communication system according to one embodiment of the present disclosure.

[0015] FIG. 2 is a diagram illustrating a frame, subframe, and slot structure in a wireless communication system according to one embodiment of the present disclosure.

[0016] FIG. 3 is a diagram illustrating an example of bandwidth portion settings in a wireless communication system according to one embodiment of the present disclosure.

[0017] FIG. 4 is a diagram illustrating an example of setting a control region of a downlink control channel in a wireless communication system according to one embodiment of the present disclosure.

[0018] FIG. 5 is a diagram illustrating the structure of a downlink control channel in a wireless communication system according to one embodiment of the present disclosure.

[0019] FIG. 6 is a diagram illustrating a case in which a terminal can have multiple PDCCH monitoring positions within a slot through Span in a wireless communication system according to one embodiment of the present disclosure.

[0020] FIG. 7 is a diagram illustrating an example of base station beam allocation according to TCI state settings in a wireless communication system according to one embodiment of the present disclosure.

[0021] FIG. 8 is a diagram illustrating an example of a TCI state allocation method for a PDCCH in a wireless communication system according to one embodiment of the present disclosure.

[0022] FIG. 9 is a diagram illustrating a TCI indication MAC CE signaling structure for PDCCH DMRS in a wireless communication system according to one embodiment of the present disclosure.

[0023] FIG. 10 is a diagram illustrating an example of a control resource set and a beam setting of a search space in a wireless communication system according to one embodiment of the present disclosure.

[0024] FIG. 11 is a diagram of a beam application time that can be considered when using an integrated TCI method in a wireless communication system according to an embodiment of the present disclosure.

[0025] FIG. 12 is a diagram illustrating another MAC-CE structure for activating and indicating a joint TCI state or a separate DL or UL TCI state in a wireless communication system according to an embodiment of the present disclosure.

[0026] Figure 13 shows an example of an SRS resource set composed of SRS resources that do not overlap in the time domain and an SRS resource set composed of SRS resources that can be transmitted while overlapping in the time domain.

[0027] Figure 14 shows an example of STxMP transmission techniques.

[0028] FIG. 15 is a diagram illustrating the structure of a terminal in a wireless communication system according to an embodiment of the present disclosure.

[0029] FIG. 16 is a diagram illustrating the structure of a base station in a wireless communication system according to an embodiment of the present disclosure.

[0030] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the attached drawings.

[0031] In describing the embodiments, descriptions of technical details that are well known in the technical field to which the present disclosure pertains and are not directly related to the present disclosure will be omitted. This is to ensure that the gist of the present disclosure is conveyed more clearly without obscuring it by omitting unnecessary explanations.

[0032] For the same reason, some components in the attached drawings are exaggerated, omitted, or schematically depicted. Furthermore, the dimensions of each component do not entirely reflect its actual size. Identical or corresponding components in each drawing are assigned the same reference numbers.

[0033] The advantages and features of the present disclosure, and methods for achieving them, will become clearer with reference to the embodiments described below in detail together with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below and may be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present disclosure is complete and to fully inform those skilled in the art of the scope of the disclosure, and the present disclosure is defined only by the scope of the claims. Like reference numerals designate like elements throughout the specification. In addition, when describing the present disclosure, if a specific description of a related function or configuration is determined to unnecessarily obscure the gist of the present disclosure, the detailed description thereof will be omitted. In addition, the terms described below are terms defined in consideration of the functions of the present disclosure, and these may vary depending on the intention or custom of the user or operator. Therefore, their definitions should be made based on the contents throughout the specification.

[0034] Hereinafter, the base station is an entity that performs resource allocation of the terminal, and may be at least one of a gNode B, an eNode B, a Node B, a BS (Base Station), a wireless access unit, a base station controller, or a node on a network. The terminal may include a UE (User Equipment), an MS (Mobile Station), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing a communication function. In the present disclosure, downlink (DL) refers to a wireless transmission path of a signal transmitted from a base station to a terminal, and uplink (UL) refers to a wireless transmission path of a signal transmitted from a terminal to a base station. In addition, although the LTE or LTE-A system may be described below as an example, the embodiments of the present disclosure may also be applied to other communication systems having a similar technical background or channel type. For example, the 5th generation mobile communication technology (5G, new radio, NR) developed after LTE-A may be included here, and the 5G below may also be a concept that includes existing LTE, LTE-A, and other similar services. In addition, the present disclosure may be applied to other communication systems with some modifications within a scope that does not significantly deviate from the scope of the present disclosure, as judged by a person having skilled technical knowledge.

[0035] At this time, it will be understood that each block of the processing flowchart drawings and combinations of the flowchart drawings can be performed by computer program instructions. These computer program instructions can be installed in a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing equipment, so that the instructions executed by the processor of the computer or other programmable data processing equipment create a means for performing the functions described in the flowchart block(s). These computer program instructions can also be stored in a computer-available or computer-readable memory that can direct a computer or other programmable data processing equipment to implement the functions in a specific manner, so that the instructions stored in the computer-available or computer-readable memory can also produce a manufactured item that includes an instruction means for performing the functions described in the flowchart block(s). Since the computer program instructions may be installed on a computer or other programmable data processing device, a series of operational steps may be performed on the computer or other programmable data processing device to create a computer-executable process, and the instructions that cause the computer or other programmable data processing device to perform the steps for performing the functions described in the flowchart block(s) may also provide steps for performing the functions described in the flowchart block(s).

[0036] Additionally, each block may represent a module, segment, or portion of code that contains one or more executable instructions for performing a specific logical function(s). It should also be noted that in some alternative implementation examples, the functions described in the blocks may occur out of order. For example, two blocks depicted in succession may actually be executed substantially concurrently, or the blocks may sometimes be executed in reverse order, depending on their respective functions.

[0037] Here, the term '~ part' used in this embodiment means software or hardware components such as FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit), and the '~ part' performs certain roles. However, the '~ part' is not limited to software or hardware. The '~ part' may be configured to be on an addressable storage medium or may be configured to play one or more processors. Therefore, as an example, the '~ part' includes components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functions provided within the components and '~ parts' may be combined into a smaller number of components and '~ parts' or further separated into additional components and '~ parts'. Additionally, the components and '~parts' may be implemented to activate one or more CPUs within a device or secure multimedia card. In addition, in an embodiment, the '~parts' may include one or more processors.

[0038] Wireless communication systems are evolving from providing voice-oriented services in the early days to broadband wireless communication systems that provide high-speed, high-quality packet data services, such as communication standards such as 3GPP's HSPA (High Speed ​​Packet Access), LTE (Long Term Evolution or E-UTRA (Evolved Universal Terrestrial Radio Access)), LTE-Advanced (LTE-A), LTE-Pro, 3GPP2's HRPD (High Rate Packet Data), UMB (Ultra Mobile Broadband), and IEEE's 802.16e.

[0039] As a representative example of the above broadband wireless communication system, the LTE system adopts the OFDM (Orthogonal Frequency Division Multiplexing) method in the downlink (DL) and the SC-FDMA (Single Carrier Frequency Division Multiple Access) method in the uplink (UL). The uplink refers to a wireless link in which a terminal (User Equipment (UE) or Mobile Station (MS)) transmits data or control signals to a base station (eNode B or base station (BS)), and the downlink refers to a wireless link in which a base station transmits data or control signals to a terminal. The above multiple access method can distinguish the data or control information of each user by allocating and operating the time-frequency resources for transmitting data or control information to each user so that they do not overlap, that is, so as to achieve orthogonality.

[0040] As a future communications system beyond LTE, 5G communication systems must be able to freely reflect the diverse needs of users and service providers. Therefore, they must support services that simultaneously satisfy these diverse requirements. Services being considered for 5G communication systems include enhanced Mobile Broadband (eMBB), massive Machine Type Communication (mMTC), and Ultra Reliability Low Latency Communication (URLLC).

[0041] eMBB aims to provide data transmission rates that are significantly higher than those supported by existing LTE, LTE-A, or LTE-Pro. For example, in a 5G communication system, eMBB must be able to support a peak data rate of 20 Gbps in the downlink and a peak data rate of 10 Gbps in the uplink from the perspective of a single base station. Furthermore, 5G communication systems must simultaneously provide the peak data rate and an increased user-perceived data rate for terminals. To meet these requirements, improvements in various transmission and reception technologies, including improved multi-input, multi-output (MIMO) transmission technology, are required. Furthermore, while LTE transmits signals using a maximum transmission bandwidth of 20 MHz in the 2 GHz band, 5G communication systems can meet the data transmission rates required by 5G communication systems by using a wider frequency bandwidth than 20 MHz in the 3-6 GHz or higher 6 GHz band.

[0042] At the same time, mMTC is being considered to support application services such as the Internet of Things (IoT) in 5G communication systems. To efficiently provide the IoT, mMTC requires supporting large-scale terminal connections within a cell, improved terminal coverage, enhanced battery life, and reduced terminal costs. The IoT requires the ability to support a large number of terminals (e.g., 1,000,000 terminals / km2) within a cell, as it provides communication capabilities through the attachment of various sensors and devices. Furthermore, due to the nature of the service, terminals supporting mMTC are likely to be located in shadow areas, such as basements, beyond cell coverage. This may require broader coverage compared to other services provided by 5G communication systems. Terminals supporting mMTC must be inexpensive, and since frequent battery replacement is unlikely, they may require extremely long battery lifespans, such as 10 to 15 years.

[0043] Finally, URLLC refers to a cellular-based wireless communication service used for a specific purpose (mission-critical). For example, services such as remote control of robots or machinery, industrial automation, unmanned aerial vehicles, remote health care, and emergency alerts can be considered. Therefore, the communication provided by URLLC must provide very low latency and very high reliability. For example, a service supporting URLLC must satisfy an air interface latency of less than 0.5 milliseconds and, at the same time, must have a 10 -5The following packet error rate (PER) requirements apply. Therefore, for services supporting URLLC, 5G systems must provide a smaller Transmit Time Interval (TTI) than other services. Simultaneously, design considerations may require the allocation of extensive resources in the frequency band to ensure communication link reliability.

[0044] The three 5G services—eMBB, URLLC, and mMTC—can be multiplexed and transmitted within a single system. To meet the differing requirements of each service, different transmission and reception techniques and parameters can be used. Of course, 5G is not limited to the three services described above.

[0045] Hereinafter, a / b can be understood as at least one of a or b.

[0046] [NR time-frequency resources]

[0047] Below, the frame structure of the 5G system is described in more detail with reference to drawings.

[0048] Figure 1 is a diagram illustrating the basic structure of the time-frequency domain, which is a radio resource domain in which data or control channels are transmitted in a 5G system.

[0049] The horizontal axis of Figure 1 represents the time domain, and the vertical axis represents the frequency domain. The basic unit of resources in the time and frequency domains is a resource element (RE, 101), which can be defined as 1 OFDM symbol (102) on the time axis and 1 subcarrier (103) on the frequency axis. In the frequency domain (For example, 12) consecutive REs can constitute one resource block (RB, 104). One subframe (110) on the time axis can include multiple OFDM symbols (102). For example, the length of one subframe can be 1 ms.

[0050] FIG. 2 is a diagram illustrating a frame, subframe, and slot structure in a wireless communication system according to one embodiment of the present disclosure.

[0051] Figure 2 illustrates an example of a structure of a frame (Frame, 200), a subframe (Subframe, 201), and a slot (Slot, 202). One frame (200) can be defined as 10ms. One subframe (201) can be defined as 1ms, and therefore one frame (200) can be composed of a total of 10 subframes (201). One slot (202, 203) can be defined as 14 OFDM symbols (i.e., the number of symbols per slot ( =14). 1 subframe (201) may be composed of one or more slots (202, 203), and the number of slots (202, 203) per 1 subframe (201) may vary depending on the setting value μ (204, 205) for the subcarrier spacing. In an example of FIG. 2, cases where the subcarrier spacing setting value μ = 0 (204) and μ = 1 (205) are illustrated. When μ = 0 (204), 1 subframe (201) may be composed of one slot (202), and when μ = 1 (205), 1 subframe (201) may be composed of two slots (203). That is, the number of slots per 1 subframe ( ) may vary, and accordingly the number of slots per frame ( ) may vary. Depending on the subcarrier spacing setting μ and can be defined as [Table 1] below.

[0052] 0141011142022144043148084141601651432032

[0053] [Bandwidth Part (BWP)]

[0054] Next, the bandwidth part (BWP) setting in the 5G communication system will be explained in detail with reference to the drawing.

[0055] FIG. 3 is a diagram illustrating an example of bandwidth portion settings in a wireless communication system according to one embodiment of the present disclosure.

[0056] FIG. 3 shows an example in which the UE bandwidth (300) is set to two bandwidth portions, namely, bandwidth portion #1 (BWP#1) (301) and bandwidth portion #2 (BWP#2) (302). The base station can set one or more bandwidth portions to the UE, and can set the information in [Table 2] below for each bandwidth portion.

[0057] BWP ::= SEQUENCE {bwp-Id BWP-Id,locationAndBandwidth INTEGER (1..65536),subcarrierSpacing ENUMERATED {n0, n1, n2, n3, n4, n5},cyclicPrefix ENUMERATED { extended}}

[0058] Of course, it is not limited to the above example, and in addition to the above configuration information, various parameters related to the bandwidth portion can be configured for the terminal. The above information can be transmitted from the base station to the terminal through upper layer signaling, for example, RRC (Radio Resource Control) signaling. At least one bandwidth portion among the configured one or more bandwidth portions can be activated. Whether or not the configured bandwidth portion is activated can be semi-statically transmitted from the base station to the terminal through RRC signaling or dynamically transmitted through DCI. According to some embodiments, the terminal before the RRC connection can receive the initial bandwidth portion (Initial BWP) for initial access from the base station through the MIB (Master Information Block). To be more specific, the terminal can receive configuration information about the control resource set (CORESET) and search space where the PDCCH for receiving system information required for initial access (which may correspond to Remaining System Information (RMSI) or System Information Block 1 (SIB1)) and the search space through the MIB during the initial access phase. The control space and search space configured by the MIB can each be regarded as identifier (ID) 0. The base station can notify the terminal of configuration information such as frequency allocation information, time allocation information, and numerology for control space #0 through the MIB. In addition, the base station can notify the terminal of configuration information about the monitoring cycle and monitoring occasion for control space #0, i.e., configuration information for search space #0, through the MIB. The terminal can regard the frequency region set as control space #0 obtained from the MIB as an initial bandwidth portion for initial access.At this time, the identifier (ID) of the initial bandwidth portion can be considered as 0. The settings for the bandwidth portion supported by the above 5G can be used for various purposes.

[0059] In some embodiments, when the bandwidth supported by a terminal is smaller than the system bandwidth, this can be supported through bandwidth portion configuration. For example, the base station can configure the bandwidth portion frequency location (configuration information 2) for the terminal, thereby allowing the terminal to transmit and receive data at a specific frequency location within the system bandwidth.

[0060] Additionally, in some embodiments, a base station may configure multiple bandwidth segments for a terminal to support different numerologies. For example, to support data transmission and reception using both 15 kHz and 30 kHz subcarrier spacing for a given terminal, two bandwidth segments may be configured with subcarrier spacings of 15 kHz and 30 kHz, respectively. The different bandwidth segments may be frequency-division multiplexed (FDM), and when data is to be transmitted and received using a specific subcarrier spacing, the bandwidth segment configured for that subcarrier spacing may be activated.

[0061] Furthermore, in some embodiments, the base station may configure bandwidth portions with different bandwidth sizes for the terminal for the purpose of reducing power consumption of the terminal. For example, if the terminal supports a very large bandwidth, such as 100 MHz, and constantly transmits and receives data using that bandwidth, very large power consumption may occur. In particular, monitoring unnecessary downlink control channels using a large bandwidth of 100 MHz in a situation where there is no traffic may be very inefficient in terms of power consumption. To reduce power consumption of the terminal, the base station may configure a bandwidth portion with a relatively small bandwidth, such as 20 MHz, for the terminal. In a situation where there is no traffic, the terminal can perform monitoring operations in the 20 MHz bandwidth portion, and when data is generated, it can transmit and receive data using the 100 MHz bandwidth portion according to the instructions of the base station.

[0062] In the method for setting the bandwidth portion, terminals prior to RRC connection (Connected) can receive configuration information for the initial bandwidth portion (Initial BWP) through the MIB during the initial access phase. More specifically, the terminal can receive a control region (i.e., CORESET) for a downlink control channel on which a DCI scheduling a System Information Block (SIB) can be transmitted from the MIB of the PBCH (Physical Broadcast Channel). The bandwidth of the control region set by the MIB can be regarded as the initial bandwidth portion, and the terminal can receive the PDSCH (Physical Downlink Shared Channel) on which the SIB is transmitted through the set initial bandwidth portion. In addition to receiving the SIB, the initial bandwidth portion can also be utilized for other system information (Other System Information (OSI), paging, and random access).

[0063] [Bandwidth Part (BWP) Change]

[0064] When one or more bandwidth part values ​​are set for a terminal, the base station can instruct the terminal to change (or switch, transition) the bandwidth part value using the bandwidth part indicator field in the DCI. For example, in FIG. 3, when the currently activated bandwidth part of the terminal is bandwidth part #1 (301), the base station can instruct the terminal to bandwidth part #2 (302) using the bandwidth part indicator in the DCI, and the terminal can perform a bandwidth part change to bandwidth part #2 (302) indicated by the bandwidth part indicator in the received DCI.

[0065] As described above, since DCI-based bandwidth part change can be indicated by DCI scheduling PDSCH or PUSCH, when a terminal receives a bandwidth part change request, it must be able to receive or transmit PDSCH or PUSCH scheduled by the corresponding DCI without difficulty in the changed bandwidth part. To this end, the standard stipulates the delay time (T) required when changing the bandwidth part. BWP ) and can be defined as in [Table 3] below, for example.

[0066] NR Slot length (ms)BWP switch delay T BWP (slots)Type 1 Note 1 Type 2 Note 1 011310.52520.253930.125618Note 1: Depends on UE capability.Note 2: If the BWP switch involves changing of SCS, the BWP switch delay is determined by the larger one between the SCS before BWP switch and the SCS after BWP switch.

[0067] The requirement for bandwidth part change delay time supports type 1 or type 2 depending on the capability of the terminal. The terminal can report the type of bandwidth part delay time that it can support to the base station. According to the requirement for bandwidth part change delay time mentioned above, if the terminal receives DCI including the bandwidth part change indicator in slot n, the terminal changes to the new bandwidth part indicated by the bandwidth part change indicator in slot n+T. BWPThe completion can be done at a later time, and transmission and reception for the data channel scheduled by the DCI can be performed in the new bandwidth portion that has been changed. When the base station wants to schedule a data channel in the new bandwidth portion, the terminal's bandwidth portion change delay time (T BWP ), time domain resource allocation for the data channel can be determined. That is, when the base station schedules the data channel with a new bandwidth portion, the data channel can be scheduled after the bandwidth portion change delay time in the method of determining the time domain resource allocation for the data channel. Accordingly, the terminal can determine whether the DCI instructing the bandwidth portion change is after the bandwidth portion change delay time (T BWP ) may not be expected to indicate a slot offset (K0 or K2) value smaller than that.

[0068] If the terminal receives DCI (e.g., DCI format 1_1 or 0_1) indicating a bandwidth change, the terminal may not perform any transmission or reception during the time period from the third symbol of the slot in which the PDCCH including the DCI is received to the start point of the slot indicated by the slot offset (K0 or K2) value indicated by the time domain resource allocation indicator field in the DCI. For example, if the terminal receives DCI indicating a bandwidth change in slot n and the slot offset value indicated by the DCI is K, the terminal may not perform any transmission or reception from the third symbol of slot n to the symbol before slot n+K (i.e., the last symbol of slot n+K-1).

[0069] [PDCCH: DCI related]

[0070] Next, we will specifically explain downlink control information (DCI) in the 5G system.

[0071] In a 5G system, scheduling information for uplink data (or physical uplink shared channel (PUSCH)) or downlink data (or physical downlink shared channel (PDSCH)) is transmitted from a base station to a terminal via DCI. The terminal can monitor a DCI format for fallback and a DCI format for non-fallback for the PUSCH or PDSCH. The fallback DCI format can be composed of fixed fields defined between the base station and the terminal, and the non-fallback DCI format can include configurable fields.

[0072] DCI can be transmitted through the Physical Downlink Control Channel (PDCCH) after going through the channel coding and modulation process. A Cyclic Redundancy Check (CRC) is attached to the DCI message payload, and the CRC can be scrambled with a Radio Network Temporary Identifier (RNTI) corresponding to the identity of the UE. Different RNTIs can be used depending on the purpose of the DCI message, such as UE-specific data transmission, power control command, or random access response. That is, the RNTI is not transmitted explicitly, but is included in the CRC calculation process. When the UE receives a DCI message transmitted on the PDCCH, it verifies the CRC using the assigned RNTI. If the CRC verification result is correct, the UE can determine that the message was transmitted to the UE.

[0073] For example, a DCI scheduling a PDSCH for System Information (SI) may be scrambled with SI-RNTI. A DCI scheduling a PDSCH for a Random Access Response (RAR) message may be scrambled with RA-RNTI. A DCI scheduling a PDSCH for a paging message may be scrambled with P-RNTI. A DCI notifying a Slot Format Indicator (SFI) may be scrambled with SFI-RNTI. A DCI notifying a Transmit Power Control (TPC) may be scrambled with TPC-RNTI. A DCI scheduling a UE-specific PDSCH or PUSCH may be scrambled with C-RNTI (Cell RNTI).

[0074] DCI format 0_0 can be used as a fallback DCI for scheduling PUSCH, in which case the CRC can be scrambled with C-RNTI. DCI format 0_0 with the CRC scrambled with C-RNTI can include, for example, the following information.

[0075] - Identifier for DCI formats- [1] bit- Frequency domain resource assignment-[ ] bits- Time domain resource assignment -

[0076] DCI format 0_1 ​​can be used as a fallback DCI for scheduling PUSCH, in which case the CRC can be scrambled with C-RNTI. DCI format 0_1 ​​with the CRC scrambled with C-RNTI can include, for example, the following information.

[0077]

[0078] - Carrier indicator - 0 or 3 bits- UL / SUL indicator - 0 or 1 bit- Identifier for DCI formats - [1] bits- Bandwidth part indicator - 0, 1 or 2 bits- Frequency domain resource assignment● For resource allocation type 0, bits● For resource allocation type 1, bits- Time domain resource assignment -1, 2, 3, or 4 bits- VRB-to-PRB mapping - 0 or 1 bit, only for resource allocation type 1.● 0 bit if only resource allocation type 0 is configured;● 1 bit otherwise.- Frequency hopping flag - 0 or 1 bit, only for resource allocation type 1.● 0 bit if only resource allocation type 0 is configured;● 1 bit otherwise.- Modulation and coding scheme - 5 bits- New data indicator - 1 bit- Redundancy version - 2 bits- HARQ process number - 4 bits- 1 stdownlink assignment index - 1 or 2 bits● 1 bit for semi-static HARQ-ACK codebook;● 2 bits for dynamic HARQ-ACK codebook with single HARQ-ACK codebook.- 2 nd downlink assignment index - 0 or 2 bits● 2 bits for dynamic HARQ-ACK codebook with two HARQ-ACK sub-codebooks;● 0 bit otherwise.- TPC command for scheduled PUSCH - 2 bits- SRS resource indicator - or bits● bits for non-codebook based PUSCH transmission;● bits for codebook based PUSCH transmission.- Precoding information and number of layers-up to 6 bits- Antenna ports- up to 5 bits- SRS request- 2 bits- CSI request - 0, 1, 2, 3, 4, 5, or 6 bits- CBG transmission information- 0, 2, 4, 6, or 8 bits- PTRS-DMRS association- 0 or 2 bits.- beta_offset indicator- 0 or 2 bits- DMRS sequence initialization- 0 or 1 bit

[0079] DCI format 1_0 can be used as a fallback DCI for scheduling PDSCH, in which case the CRC can be scrambled with C-RNTI. DCI format 1_0 with the CRC scrambled with C-RNTI can include, for example, the following information.

[0080] - Identifier for DCI formats - [1] bit- Frequency domain resource assignment -[ ] bits- Time domain resource assignment - [3] bits

[0081] DCI format 1_1 can be used as a fallback DCI for scheduling PDSCH, in which case the CRC can be scrambled with C-RNTI. DCI format 1_1 with the CRC scrambled with C-RNTI can include, for example, the following information.

[0082] - Carrier indicator - 0 or 3 bits- Identifier for DCI formats - [1] bits- Bandwidth part indicator - 0, 1 or 2 bits- Frequency domain resource assignment● For resource allocation type 0, bits● For resource allocation type 1, bits- Time domain resource assignment -1, 2, 3, or 4 bits- VRB-to-PRB mapping - 0 or 1 bit, only for resource allocation type 1.● 0 bit if only resource allocation type 0 is configured;● 1 bit otherwise.- PRB bundling size indicator - 0 or 1 bit- Rate matching indicator - 0, 1, or 2 bits- ZP CSI-RS trigger- 0, 1, or 2 bitsFor transport block 1:- Modulation and coding scheme - 5 bits- New data indicator - 1 bit- Redundancy version - 2 bitsFor transport block 2:- Modulation and coding scheme - 5 bits- New data indicator - 1 bit- Redundancy version - 2 bits- HARQ process number - 4 bits- Downlink assignment index - 0 or 2 or 4 bits- TPC command for scheduled PUCCH - 2 bits- PUCCH resource indicator - 3 bits- PDSCH-to-HARQ_feedback timing indicator - 3 bits- Antenna ports - 4, 5 or 6 bits- Transmission configuration indication - 0 or 3 bits- SRS request - 2 bits- CBG transmission information - 0, 2, 4, 6, or 8 bits- CBG flushing out information - 0 or 1 bit- DMRS sequence initialization - 1 bit.

[0083] [PDCCH: CORESET, REG, CCE, Search Space]

[0084] 하기에서는 5G 통신 시스템에서의 하향링크 제어채널에 대하여 도면을 참조하여 보다 구체적으로 설명하고자 한다.

[0085] FIG. 4 is a diagram illustrating an example of a control region (Control Resource Set, CORESET) in which a downlink control channel is transmitted in a 5G wireless communication system.

[0086] FIG. 4 illustrates an example in which two control regions (Control Region #1 (401), Control Region #2 (402)) are set within a UE bandwidth part (410) in the frequency axis and within one slot (420) in the time axis. The control regions (401, 402) can be set to specific frequency resources (403) within the entire UE bandwidth part (410) in the frequency axis. The time axis can be set to one or more OFDM symbols, which can be defined as the control region length (Control Resource Set Duration, 404). Referring to the example illustrated in FIG. 4, Control Region #1 (401) is set to a control region length of two symbols, and Control Region #2 (402) is set to a control region length of one symbol.

[0087] In the aforementioned 5G, the control region can be established by the base station to the terminal via higher-layer signaling (e.g., system information, Master Information Block (MIB), Radio Resource Control (RRC) signaling). Establishing a control region for the terminal means providing information such as the control region identifier, the frequency location of the control region, and the symbol length of the control region. For example, the information may include the following:

[0088] ControlResourceSet ::= SEQUENCE {-- Corresponds to L1 parameter 'CORESET-ID'controlResourceSetId ControlResourceSetId,frequencyDomainResources BIT STRING (SIZE (45)),duration INTEGER (1..maxCoReSetDuration),cce-REG-MappingType CHOICE {interleaved SEQUENCE {reg-BundleSize ENUMERATED {n2, n3, n6},precoderGranularity ENUMERATED {sameAsREG-bundle, allContiguousRBs},interleaverSize ENUMERATED {n2, n3, n6}shiftIndex INTEGER(0..maxNrofPhysicalResourceBlocks-1) OPTIONAL},nonInterleaved NULL},tci-StatesPDCCH SEQUENCE(SIZE (1..maxNrofTCI-StatesPDCCH)) OF TCI-StateId OPTIONAL,tci-PresentInDCI ENUMERATED {enabled} OPTIONAL, -- Need S}

[0089] In Table 8, the tci-StatesPDCCH (simply named TCI (Transmission Configuration Indication) state) configuration information may include information on one or more SS (Synchronization Signal) / PBCH (Physical Broadcast Channel) block indices or CSI-RS (Channel State Information Reference Signal) indices that are in a QCL (Quasi Co Located) relationship with the DMRS transmitted in the corresponding control region. FIG. 5 is a diagram showing an example of a basic unit of time and frequency resources constituting a downlink control channel that can be used in 5G. According to FIG. 5, the basic unit of time and frequency resources constituting the control channel can be referred to as a REG (Resource Element Group, 503), and the REG (503) can be defined as 1 OFDM symbol (501) in the time axis and 1 PRB (Physical Resource Block, 502) in the frequency axis, i.e., 12 subcarriers. The base station can connect REGs (503) to form a downlink control channel allocation unit.

[0090] As illustrated in FIG. 5, if the basic unit to which a downlink control channel is allocated in 5G is called a CCE (Control Channel Element, 504), 1 CCE (504) can be composed of multiple REGs (503). Taking the REG (503) illustrated in FIG. 5 as an example, the REG (503) can be composed of 12 REs, and if 1 CCE (504) is composed of 6 REGs (503), 1 CCE (504) can be composed of 72 REs. When a downlink control region is set, the region can be composed of multiple CCEs (504), and a specific downlink control channel can be mapped to one or multiple CCEs (504) and transmitted according to the aggregation level (AL) within the control region. CCEs (504) within the control area are distinguished by numbers, and the numbers of the CCEs (504) can be assigned according to a logical mapping method.

[0091] The basic unit of the downlink control channel illustrated in FIG. 5, that is, the REG (503), may include both the REs to which the DCI is mapped and the areas to which the DMRS (505), which is a reference signal for decoding the REs, is mapped. As shown in FIG. 5, three DMRSs (505) may be transmitted within one REG (503). The number of CCEs required to transmit the PDCCH may be 1, 2, 4, 8, or 16 depending on the aggregation level (AL), and different numbers of CCEs may be used to implement link adaptation of the downlink control channel. For example, when AL = L, one downlink control channel may be transmitted through L CCEs. The terminal must detect a signal without knowing information about the downlink control channel, and a search space representing a set of CCEs is defined for blind decoding. A search space is a set of downlink control channel candidates (CCEs) that a terminal must attempt to decode at a given aggregation level. Since there are multiple aggregation levels, each of which can be a set of 1, 2, 4, 8, or 16 CCEs, a terminal can have multiple search spaces. A search space set can be defined as the set of search spaces at all configured aggregation levels.

[0092] Search spaces can be categorized into common search spaces and UE-specific search spaces. A certain group of UEs, or all UEs, can search the common search space of the PDCCH to receive cell-common control information, such as dynamic scheduling of system information or paging messages. For example, PDSCH scheduling allocation information for transmitting SIBs, including cell operator information, can be received by searching the common search space of the PDCCH. In the case of the common search space, since a certain group of UEs, or all UEs, must receive the PDCCH, it can be defined as a set of pre-arranged CCEs. Scheduling allocation information for UE-specific PDSCH or PUSCH can be received by searching the UE-specific search space of the PDCCH. The UE-specific search space can be defined UE-specifically as a function of the UE's identity and various system parameters.

[0093] In 5G, parameters for the search space for PDCCH can be configured from the base station to the terminal through higher layer signaling (e.g., SIB, MIB, RRC signaling). For example, the base station can configure the number of PDCCH candidates at each aggregation level L, the monitoring period for the search space, the monitoring occasion for each symbol within the slot for the search space, the search space type (common search space or terminal-specific search space), the combination of DCI format and RNTI to be monitored in the corresponding search space, the control region index to be monitored for the search space, etc. to the terminal. For example, the following information can be included.

[0094] SearchSpace ::= SEQUENCE {-- Identity of the search space. SearchSpaceId = 0 identifies the SearchSpace configured via PBCH (MIB) or ServingCellConfigCommon.searchSpaceId SearchSpaceId,controlResourceSetId ControlResourceSetId,monitoringSlotPeriodicityAndOffset CHOICE {sl1 NULL,sl2 INTEGER (0..1),sl4 INTEGER (0..3),sl5 INTEGER (0..4),sl8 INTEGER (0..7),sl10 INTEGER (0..9),sl16 INTEGER (0..15),sl20 INTEGER (0..19)} OPTIONAL,duration INTEGER (2..2559)monitoringSymbolsWithinSlot BIT STRING (SIZE (14)) OPTIONAL,nrofCandidates SEQUENCE {aggregationLevel1 ENUMERATED {n0, n1, n2, n3, n4, n5, n6, n8},aggregationLevel2 ENUMERATED {n0, n1, n2, n3, n4, n5, n6, n8},aggregationLevel4 ENUMERATED {n0, n1, n2, n3, n4, n5, n6, n8},aggregationLevel8 ENUMERATED {n0, n1, n2, n3, n4, n5, n6, n8},aggregationLevel16 ENUMERATED {n0, n1, n2, n3, n4, n5, n6, n8}},searchSpaceType CHOICE {-- Configures this search space as common search space (CSS) and DCI formats to monitor.common SEQUENCE {}ue-Specific SEQUENCE {-- Indicates whether the UE monitors in this USS for DCI formats 0-0 and 1-0 or for formats 0-1 and 1-1.formats ENUMERATED {formats0-0-And-1-0, formats0-1-And-1-1},...}.

[0095] According to the configuration information, the base station can set one or more search space sets for the terminal. In some embodiments, the base station can set search space set 1 and search space set 2 for the terminal, and can set the terminal to monitor DCI format A scrambled with X-RNTI in search space set 1 in a common search space, and can set the terminal to monitor DCI format B scrambled with Y-RNTI in search space set 2 in a terminal-specific search space. According to the configuration information, one or more search space sets may exist in the common search space or the terminal-specific search space. For example, search space set #1 and search space set #2 may be set as common search spaces, and search space set #3 and search space set #4 may be set as terminal-specific search spaces. In the common search space, the following combinations of DCI formats and RNTIs may be monitored. Of course, the present invention is not limited to the following examples.

[0096] - DCI format 0_0 / 1_0 with CRC scrambled by C-RNTI, CS-RNTI, SP-CSI-RNTI, RA-RNTI, TC-RNTI, P-RNTI, SI-RNTI

[0097] - DCI format 2_0 with CRC scrambled by SFI-RNTI

[0098] - DCI format 2_1 with CRC scrambled by INT-RNTI

[0099] - DCI format 2_2 with CRC scrambled by TPC-PUSCH-RNTI, TPC-PUCCH-RNTI

[0100] - DCI format 2_3 with CRC scrambled by TPC-SRS-RNTI

[0101] In a terminal-specific search space, the following combinations of DCI formats and RNTIs can be monitored. Of course, the examples below are not limited to these examples.

[0102] - DCI format 0_0 / 1_0 with CRC scrambled by C-RNTI, CS-RNTI, TC-RNTI

[0103] - DCI format 1_0 / 1_1 with CRC scrambled by C-RNTI, CS-RNTI, TC-RNTI

[0104] The RNTIs specified may follow the definitions and uses below.

[0105] C-RNTI (Cell RNTI): For terminal-specific PDSCH scheduling purposes

[0106] TC-RNTI (Temporary Cell RNTI): For terminal-specific PDSCH scheduling purposes

[0107] CS-RNTI (Configured Scheduling RNTI): Used for terminal-specific PDSCH scheduling that is set semi-statically.

[0108] RA-RNTI (Random Access RNTI): Used for PDSCH scheduling in the random access phase.

[0109] P-RNTI (Paging RNTI): Used for scheduling PDSCH where paging is transmitted.

[0110] SI-RNTI (System Information RNTI): Used for scheduling PDSCH where system information is transmitted.

[0111] INT-RNTI (Interruption RNTI): Used to indicate whether pucturing is in progress for PDSCH.

[0112] TPC-PUSCH-RNTI (Transmit Power Control for PUSCH RNTI): Used to indicate power control commands for PUSCH.

[0113] TPC-PUCCH-RNTI (Transmit Power Control for PUCCH RNTI): Used to indicate power control commands for PUCCH.

[0114] TPC-SRS-RNTI (Transmit Power Control for SRS RNTI): Used to indicate power control commands for SRS.

[0115] The aforementioned specified DCI formats may follow the definitions below.

[0116] DCI formatUsage0_0Scheduling of PUSCH in one cell0_1Scheduling of PUSCH in one cell1_0Scheduling of PDSCH in one cell1_1Scheduling of PDSCH in one cell2_0Notifying a group of UEs of the slot format2_1Notifying a group of UEs of the PRB(s) and OFDM symbol(s) where UE may assume no transmission is intended for the UE2_2Transmission of TPC commands for PUCCH and PUSCH2_3Transmission of a group of TPC commands for SRS transmissions by one or more UEs

[0117] In 5G, the search space of aggregation level L in control domain p and search space set s can be expressed as follows.

[0118]

[0119] - : Integration level

[0120] - : Carrier Index

[0121] - : Total number of CCEs existing within the control region p

[0122] - : slot index

[0123] - : Number of PDCCH candidates for aggregation level L

[0124] - = 0, ..., -1: PDCCH candidate index of aggregation level L

[0125] - = 0, ..., -1

[0126] - , , , , ,

[0127] - : Terminal identifier

[0128] The value can be 0 for a common search space.

[0129] In the case of a terminal-specific search space, the value may correspond to a value that changes depending on the terminal's identity (C-RNTI or ID set to the terminal by the base station) and the time index.

[0130] In 5G, since multiple search space sets can be configured with different parameters (e.g., parameters in Table 10), the set of search space sets monitored by a terminal at each point in time can be different. For example, if search space set #1 is configured with an X-slot period and search space set #2 is configured with a Y-slot period and X and Y are different, the terminal can monitor both search space set #1 and search space set #2 in a specific slot, or can monitor either search space set #1 or search space set #2 in a specific slot.

[0131] [PDCCH: span]

[0132] A terminal can perform terminal capability reporting for each subcarrier interval when it has multiple PDCCH monitoring positions within a slot, and at this time, the concept of Span can be used. A Span refers to consecutive symbols within a slot in which the terminal can monitor a PDCCH, and each PDCCH monitoring position is within one Span. A Span can be expressed as (X, Y), where x refers to the minimum number of symbols that must be spaced between the first symbols of two consecutive Spans, and Y refers to the number of consecutive symbols in which the PDCCH can be monitored within one Span. In this case, the terminal can monitor the PDCCH in the section from the first symbol of the Span to within Y symbols within the Span.

[0133] FIG. 6 is a diagram illustrating a case in which a terminal in a wireless communication system can have multiple PDCCH monitoring positions within a slot through Span.

[0134] Span can be (X,Y) = (7,3), (4,3), (2,2), and each of these three cases is represented by (6-00), (6-05), and (6-10) in Fig. 6. For example, (6-00) represents a case where there are two Spans that can be expressed as (7,3) within a slot. The interval between the first symbols of the two Spans is represented as X=7, and the PDCCH monitoring position can exist within a total of Y=3 symbols from the first symbol of each Span, and search spaces 1 and 2 each exist within Y=3 symbols. As another example, (6-05) represents a case where there are three Spans that can be expressed as (4,3) within a slot, and the interval between the second and third Spans is X'=5 symbols, which is larger than X=4.

[0135] [QCL, TCI state]

[0136] In a wireless communication system, one or more different antenna ports (or one or more channels, signals, and combinations thereof, but for convenience, they will be referred to as different antenna ports in the following description of the present disclosure) can be associated with each other by a QCL (Quasi co-location) setting as shown in [Table 11] below. The TCI state is to notify the QCL relationship between the PDCCH (or PDCCH DMRS) and other RSs or channels. When a reference antenna port A (reference RS #A) and another target antenna port B (target RS #B) are QCLed with each other, it means that the terminal is allowed to apply some or all of the large-scale channel parameters estimated at the antenna port A to the channel measurement from the antenna port B. QCL may need to relate different parameters depending on the situation, such as 1) time tracking affected by average delay and delay spread, 2) frequency tracking affected by Doppler shift and Doppler spread, 3) radio resource management (RRM) affected by average gain, and 4) beam management (BM) affected by spatial parameters. Accordingly, NR supports four types of QCL relationships, as shown in Table 11 below.

[0137] QCL typeLarge-scale characteristicsADoppler shift, Doppler spread, average delay, delay spreadBDoppler shift, Doppler spreadCDoppler shift, average delayDSpatial Rx parameter

[0138] The above spatial RX parameter may collectively 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, spatial channel correlation, etc. The above QCL relationship can be set to the terminal through the RRC parameters TCI-State and QCL-Info as shown in Table 12 below. Referring to Table 12, the base station can set one or more TCI states to the terminal and inform the RS referencing the ID of the TCI state, i.e., up to two QCL relationships (qcl-Type1, qcl-Type2) for the target RS. At this time, each QCL information (QCL-Info) included in the above TCI state includes the serving cell index and BWP index of the reference RS indicated by the corresponding QCL information, the type and ID of the reference RS, and the QCL type as shown in Table 11 above.

[0139] TCI-State ::= SEQUENCE {tci-StateId TCI-StateId,qcl-Type1 QCL-Info,qcl-Type2 QCL-Info OPTIONAL, -- Need R...}QCL-Info ::= SEQUENCE {cell ServCellIndex OPTIONAL, -- Need Rbwp-Id BWP-Id OPTIONAL, -- Cond CSI-RS-IndicatedreferenceSignal CHOICE {csi-rs NZP-CSI-RS-ResourceId,ssb SSB-Index},qcl-Type ENUMERATED {typeA, typeB, typeC, typeD},...}

[0140] FIG. 7 is a diagram illustrating an example of base station beam allocation according to TCI state settings. Referring to FIG. 7, the base station can transmit information on N different beams to the terminal through N different TCI states. For example, in case of N=3 as shown in FIG. 7, the base station can notify that antenna ports referencing different TCI states 700, 705, or 710 have different spatial Rx parameters, i.e., are associated with different beams, by setting the qcl-Type2 parameter included in three TCI states (700, 705, 710) to be associated with CSI-RS or SSB corresponding to different beams and to QCL type D. Tables 13 to 17 below show valid TCI state settings according to target antenna port types.

[0141] Table 13 shows valid TCI state settings when the target antenna port is a CSI-RS for tracking (TRS). The TRS refers to an NZP CSI-RS with no repetition parameter set and trs-Info set to true among CSI-RSs. Setting 3 in Table 16 can be used for aperiodic TRS.

[0142] [Table 13] Valid TCI state settings when the target antenna port is CSI-RS for tracking (TRS)

[0143]

[0144] Table 14 shows valid TCI state settings 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 (e.g., repetition parameter) among CSI-RSs is not set and trs-Info is not set to true.

[0145] [Table 14] Valid TCI state settings when the target antenna port is CSI-RS for CSI

[0146]

[0147] Table 15 shows valid TCI state settings when the target antenna port is CSI-RS for beam management (BM, synonymous with CSI-RS for L1 RSRP reporting). The CSI-RS for BM refers to an NZP CSI-RS in which the repetition parameter is set to On or Off among CSI-RSs and trs-Info is not set to true.

[0148] [Table 15] Valid TCI state settings when the target antenna port is CSI-RS for BM (for L1 RSRP reporting)

[0149]

[0150] Table 16 shows the valid TCI state settings when the target antenna port is PDCCH DMRS.

[0151] [Table 16] Valid TCI state settings when the target antenna port is PDCCH DMRS

[0152]

[0153] Table 17 shows the valid TCI state settings when the target antenna port is PDSCH DMRS.

[0154] [Table 17] Valid TCI state settings when the target antenna port is PDSCH DMRS

[0155]

[0156] A representative QCL configuration method according to Tables 13 to 17 above is to operate by setting the target antenna port and reference antenna port for each step as "SSB" -> "TRS" -> "CSI-RS for CSI, or CSI-RS for BM, or PDCCH DMRS, or PDSCH DMRS." Through this, it is possible to link statistical characteristics that can be measured from SSB and TRS to each antenna port to assist the terminal's reception operation.

[0157] [PDCCH: TCI state related]

[0158] Specifically, the TCI state combinations applicable to the PDCCH DMRS antenna port are as shown in Table 18 below. The fourth row in Table 18 is the combination assumed by the terminal before RRC configuration, and configuration after RRC is not possible.

[0159] Valid TCIstate ConfigurationDL RS 1qcl-Type1DL RS 2(if configured)qcl-Type2(if configured)1TRSQCL-TypeATRSQCL-TypeD2TRSQCL-TypeACSI-RS (BM)QCL-TypeD3CSI-RS (CSI)QCL-TypeA 4SS / PBCH BlockQCL-TypeASS / PBCH BlockQCL-TypeD

[0160] NR supports a hierarchical signaling method as illustrated in FIG. 8 for dynamic allocation of PDCCH beams. Referring to FIG. 8, a base station can set N TCI states (805, 810, 815, ..., 820) to a terminal through RRC signaling (800), and can set some of them as TCI states for CORESET (825). Thereafter, the base station can indicate one of the TCI states (830, 835, ..., 840) for CORESET to the terminal through MAC CE signaling (845). Thereafter, the terminal receives the PDCCH based on beam information included in the TCI state indicated by the MAC CE signaling. FIG. 9 is a diagram illustrating a TCI indication MAC CE signaling structure for the PDCCH DMRS. Referring to FIG. 9, the TCI indication MAC CE signaling for the PDCCH DMRS consists of 2 bytes (16 bits) (900, 905) and includes a 5-bit serving cell ID (915), a 4-bit CORESET ID (920), and a 7-bit TCI state ID (925). FIG. 10 is a diagram illustrating an example of beam configuration of a control resource set (CORESET) and a search space according to the above description. Referring to FIG. 10, the base station can indicate one of the TCI state lists included in the CORESET (1000) configuration through MAC CE signaling (1005). Until another TCI state is indicated to the CORESET via another MAC CE signaling, the terminal considers that the same QCL information (beam #1, 1005) applies to all search spaces (1010, 1015, 1020) connected to the CORESET.The above-described PDCCH beam allocation method has a problem in that it is difficult to instruct a beam change faster than the MAC CE signaling delay, and also has a disadvantage in that the same beam is applied to all CORESETs regardless of the search space characteristics, which makes flexible PDCCH beam operation difficult. The following embodiments of the present invention provide a more flexible PDCCH beam setting and operation method. In describing the embodiments of the present invention below, several distinct examples are provided for the convenience of explanation, but these are not mutually exclusive and can be applied in combination with each other appropriately depending on the situation.

[0161] A base station can set one or more TCI states for a specific control region to a terminal, and can activate one of the set TCI states through a MAC CE activation command. For example, if {TCI state#0, TCI state#1, TCI state#2} are set as TCI states in control region #1, the base station can transmit a command to the terminal to activate TCI state#0 for control region #1 through MAC CE. Based on the activation command for the TCI state received through MAC CE, the terminal can correctly receive DMRS of the corresponding control region based on QCL information in the activated TCI state.

[0162] For a control region (control region #0) with an index set to 0, if the terminal has not received a MAC CE activation command for the TCI state of control region #0, the terminal can assume that it has QCL with the SS / PBCH block identified during the initial access process or the non-contention-based random access process that is not triggered by a PDCCH command for the DMRS transmitted in control region #0.

[0163] For a control region (control region #X) whose index is set to a value other than 0, if the terminal has not set a TCI state for the control region #X, or has set one or more TCI states but has not received a MAC CE activation command to activate one of them, the terminal may assume that the DMRS transmitted in the control region #X is QCL with the SS / PBCH block identified during the initial access process.

[0164] [Unified TCI state]

[0165] Hereinafter, a single TCI state indication and activation method based on the unified TCI scheme is described. The unified TCI scheme can refer to a method of integrating and managing the transmission and reception beam management methods, which were distinguished into the TCI state method used for downlink reception of the terminal in the existing Rel-15 and 16 and the spatial relation info method used for uplink transmission, into a TCI state. Therefore, when the terminal is instructed by the base station based on the unified TCI scheme, it can perform beam management using the TCI state even for uplink transmission. If the terminal has set a TCI-State, which is an upper layer signaling with the tci-stateId-r17, which is an upper layer signaling, from the base station, the terminal can perform operations based on the unified TCI scheme using the corresponding TCI-State. The TCI-State can exist in two forms: a joint TCI state or a separate TCI state.

[0166] The first type is a joint TCI state, and the terminal can be instructed by the base station to use both the TCI state to apply to uplink transmission and downlink reception through a single TCI-State. If the terminal is instructed to use a TCI-State based on a joint TCI state, the terminal can use the RS corresponding to qcl-Type1 in the TCI-State based on the joint TCI state to instruct the parameters to use for downlink channel estimation, and the RS corresponding to qcl-Type2 to instruct the parameters to use as a downlink reception beam or reception filter. If the terminal is instructed to use a TCI-State based on a joint TCI state, the terminal can use the RS corresponding to qcl-Type2 in the TCI-State based on the joint DL / UL TCI state to instruct the parameters to use as an uplink transmission beam or transmission filter. In this case, if the terminal is instructed to use a joint TCI state, the terminal can apply the same beam to both uplink transmission and downlink reception.

[0167] The second form is a separate TCI state, in which the terminal can be individually instructed by the base station to select a UL TCI state to apply to uplink transmission and a DL TCI state to apply to downlink reception. If the terminal is instructed to select a UL TCI state, the terminal can be instructed to select parameters to use as an uplink transmission beam or transmission filter using the reference RS or source RS configured in the UL TCI state. If the terminal is instructed to select a DL TCI state, the terminal can be instructed to select parameters to use for downlink channel estimation using the RS corresponding to qcl-Type1 configured in the DL TCI state, and to select parameters to use as a downlink reception beam or reception filter using the RS corresponding to qcl-Type2.

[0168] If the terminal is instructed with both the DL TCI state and the UL TCI state, the terminal can be instructed with parameters to be used as an uplink transmission beam or a transmission filter using the reference RS or source RS set in the corresponding UL TCI state, and can be instructed with parameters to be used for downlink channel estimation using the RS corresponding to qcl-Type1 set in the corresponding DL TCI state, and can be instructed with parameters to be used as a downlink reception beam or a reception filter using the RS corresponding to qcl-Type2. In this case, if the reference RS or source RS set in the DL TCI state and UL TCI state to which the terminal is instructed are different, the terminal can individually apply beams to uplink transmission and downlink reception, respectively, based on the instructed UL TCI state and DL TCI state.

[0169] A terminal can receive a joint TCI state from a base station for each bandwidth part within a specific cell through upper layer signaling up to 128 times, and among the separate TCI states, a DL TCI state can be set for each bandwidth part within a specific cell up to 64 or 128 times through upper layer signaling based on a terminal capability report. Among the separate TCI states, the DL TCI state and the joint TCI state can use the same upper layer signaling structure. For example, if 128 joint TCI states are set and 64 DL TCI states are set among the separate TCI states, the 64 DL TCI states can be included in the 128 joint TCI states.

[0170] Among the separate TCI states, the UL TCI state can be set to a maximum of 32 or 64 upper layer signaling for each specific bandwidth part within a specific cell based on the terminal capability report, and like the relationship between the DL TCI state and the joint TCI state among the separate TCI states, the UL TCI state and the joint TCI state among the separate TCI can also use the same upper layer signaling structure, and the UL TCI state among the separate TCI can use different upper layer signaling structures from the joint TCI state and the DL TCI state among the separate TCI states.

[0171] The use of different or identical upper layer signaling structures may be defined in the specification, or may be distinguished through another upper layer signaling established by the base station based on a terminal capability report containing information on which of the two usage modes the terminal can support.

[0172] The terminal can receive transmission and reception beam-related instructions in an integrated TCI manner using one of the joint TCI state and separate TCI state configured by the base station. The terminal can be configured by the base station via upper layer signaling whether to use either the joint TCI state or separate TCI state.

[0173] The terminal receives transmission / reception beam-related instructions using one of the methods selected from the joint TCI state and the separate TCI state through upper layer signaling. At this time, there may be two transmission / reception beam instruction methods from the base station: a MAC-CE-based instruction method and a MAC-CE-based activation and DCI-based instruction method.

[0174] If a terminal receives a transmission / reception beam-related instruction using a joint TCI state method through upper layer signaling, the terminal can perform a transmission / reception beam application operation by receiving a MAC-CE indicating the joint TCI state from a base station, and the base station can schedule reception of a PDSCH including the MAC-CE through a PDCCH for the terminal. If the MAC-CE includes one joint TCI state, the UE can use the indicated joint TCI state to determine the uplink transmission beam or transmission filter and the downlink reception beam or reception filter starting 3 ms after transmitting a PUCCH including HARQ-ACK information indicating whether reception of the PDSCH including the MAC-CE is successful. If the MAC-CE includes two or more joint TCI states, the UE can confirm that the multiple joint TCI states indicated by the MAC-CE correspond to each code point of the TCI state field of DCI format 1_1 or 1_2 starting 3 ms after transmitting a PUCCH including HARQ-ACK information indicating whether reception of the PDSCH including the MAC-CE is successful, and activate the indicated joint TCI state. Afterwards, the UE can receive DCI format 1_1 or 1_2 and apply one joint TCI state indicated by the TCI state field in the corresponding DCI to the uplink transmission and downlink reception beams. At this time, DCI format 1_1 or 1_2 may or may not include downlink data channel scheduling information (with DL assignment) or may not include it (without DL assignment).

[0175] If a terminal receives an instruction related to a transmit / receive beam using a separate TCI state method through upper layer signaling, the terminal can perform a transmit / receive beam application operation by receiving a MAC-CE indicating a separate TCI state from a base station, and the base station can schedule reception of a PDSCH including the corresponding MAC-CE to the terminal through a PDCCH. If the MAC-CE includes only one set of separate TCI states, the terminal can determine an uplink transmit beam or transmit filter and a downlink receive beam or receive filter using the separate TCI states included in the indicated separate TCI state set starting from 3 ms after transmitting a PUCCH including HARQ-ACK information indicating whether reception of the corresponding PDSCH was successful. At this time, the separate TCI state set may mean single or multiple separate TCI states that one code point of the TCI state field in DCI format 1_1 or 1_2 can have, and one separate TCI state set may include one DL TCI state, one UL TCI state, or one DL TCI state and one UL TCI state. If there are two or more separate TCI state sets included in the MAC-CE, the UE may confirm that the multiple separate TCI state sets indicated by the MAC-CE correspond to each code point of the TCI state field of DCI format 1_1 or 1_2 starting from 3 ms after transmitting the PUCCH including HARQ-ACK information indicating whether reception for the corresponding PDSCH was successful, and may activate the indicated separate TCI state set.At this time, each code point of the TCI state field of DCI format 1_1 or 1_2 can indicate one DL TCI state, one UL TCI state, or one DL TCI state and one UL TCI state each. The terminal can receive DCI format 1_1 or 1_2 and apply a separate set of TCI states indicated by the TCI state field in the corresponding DCI to the uplink transmission and downlink reception beams. At this time, DCI format 1_1 or 1_2 may include downlink data channel scheduling information (with DL assignment) or may not include it (without DL assignment).

[0176] FIG. 11 is a diagram of a beam application time that can be considered when using an integrated TCI method in a wireless communication system according to an embodiment of the present disclosure.

[0177] As described above, the terminal may receive DCI format 1_1 or 1_2 from the base station, including (with DL assignment) or not including (without DL assignment) downlink data channel scheduling information, and apply one joint TCI state or a separate set of TCI states indicated by the TCI state field in the corresponding DCI to the uplink transmission and downlink reception beams.

[0178] - DCI format 1_1 or 1_2 with DL assignment (11-00): If the terminal receives DCI format 1_1 or 1_2 including downlink data channel scheduling information from the base station (11-01) and indicates one joint TCI state or a separate TCI state set based on the integrated TCI method, the terminal receives a PDSCH scheduled based on the received DCI (11-05), and can transmit a PUCCH including an HARQ-ACK indicating whether reception of the DCI and the PDSCH was successful (11-10). At this time, the HARQ-ACK can include the meaning of whether reception of both the DCI and the PDSCH was successful, and if at least one of the DCI and the PDSCH was not received, the terminal can transmit a NACK, and if reception of both was successful, the terminal can transmit an ACK.

[0179] - DCI format 1_1 or 1_2 without DL assignment (11-50): If the terminal receives DCI format 1_1 or 1_2 from the base station that does not include downlink data channel scheduling information (11-55) and indicates one joint TCI state or a set of separate TCI states based on the integrated TCI method, the terminal may assume at least one combination of the following for the corresponding DCI.

[0180] ■ Includes scrambled CRC using CS-RNTI.

[0181] ■ The value of all bits assigned to all fields used as RV (Redundancy Version) fields is 1.

[0182] ■ The value of all bits assigned to all fields used as MCS (Modulation and Coding Scheme) fields is 1.

[0183] ■ The value of all bits assigned to all fields used as NDI (New Data Indication) fields is 0.

[0184] ■ For FDRA (Frequency Domain Resource Allocation) Type 0, the value of all bits allocated to the FDRA field is 0, for FDRA Type 1, the value of all bits allocated to the FDRA field is 1, and when the FDRA method is dynamicSwitch, the value of all bits allocated to the FDRA field is 0.

[0185] The terminal can transmit a PUCCH including a HARQ-ACK indicating whether reception was successful for the DCI format 1_1 or 1_2 assuming the above-described matters (11-60).

[0186] - For both DCI format 1_1 or 1_2 with DL assignment (11-00) and without DL assignment (11-50), if a new TCI state indicated through DCI (11-01, 11-55) is the same as a TCI state that has already been indicated and applied to an uplink transmission and downlink reception beam, the terminal may maintain the previously applied TCI state, and if the new TCI state is different from the previously indicated TCI state, the terminal may determine the application time of a set of joint TCI states or separate TCI states that can be indicated from the TCI state field included in the DCI as the time after the first slot (11-20, 11-70) after the time equal to BAT (beam application time, 11-15, 11-65) after the PUCCH transmission, and (11-30, 11-80) before the corresponding slot (11-20, 11-70). Until 11-75, the previously indicated TCI-state can be used.

[0187] - For both DCI format 1_1 or 1_2 with DL assignment (11-00) and without DL assignment (11-50), the BAT can be set by upper layer signaling based on the terminal capability report information as a specific number of OFDM symbols, and the numerology for the BAT and the first slot after the BAT can be determined based on the smallest numerology among all cells to which the joint TCI state or separate TCI state set indicated through the DCI applies.

[0188] A terminal can apply one joint TCI state indicated via MAC-CE or DCI to reception of control resource sets connected to all terminal-specific search spaces, reception of PDSCHs scheduled as PDCCHs transmitted from the control resource sets, transmission of PUSCHs, and transmission of all PUCCH resources.

[0189] A terminal may apply one separate TCI state set, if one separate TCI state set indicated via MAC-CE or DCI includes one DL TCI state, to reception for control resource sets connected to all terminal-specific search spaces, to reception for PDSCH scheduled as PDCCH transmitted from the control resource set, and to all PUSCH and PUCCH resources based on the previously indicated UL TCI state.

[0190] A terminal can apply a separate TCI state set indicated via MAC-CE or DCI to all PUSCH and PUCCH resources if it includes one UL TCI state, and can apply it to reception of control resource sets connected to all terminal-specific search spaces based on previously indicated DL TCI states, and to reception of PDSCH scheduled as PDCCH transmitted from the corresponding control resource set.

[0191] When a separate set of TCI states indicated via MAC-CE or DCI includes one DL TCI state and one UL TCI state, the terminal may apply the DL TCI state to reception for all control resource sets associated with the terminal-specific search space and to reception for PDSCH scheduled as PDCCH transmitted from the control resource set, and may apply the UL TCI state to all PUSCH and PUCCH resources.

[0192] [Unified TCI state MAC-CE]

[0193] Hereinafter, a single TCI state indication and activation method based on the integrated TCI scheme is described. The terminal receives a PDSCH including the following MAC-CE from the base station, and from 3 slots after transmitting a HARQ-ACK for the corresponding PDSCH to the base station, the terminal can interpret each code point of the TCI state 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 can activate each entry of the MAC-CE received from the base station to each code point of the TCI state field in DCI format 1_1 or 1_2.

[0194] FIG. 12 is a diagram illustrating another MAC-CE structure for activating and indicating a joint TCI state or separate DL or UL TCI state in a wireless communication system according to an embodiment of the present disclosure. The meaning of each field within the MAC-CE structure may be as follows.

[0195] - Serving Cell ID (12-00): This field can indicate which serving cell the MAC-CE is applied to. The length of this field can be 5 bits. If the serving cell indicated by this field is included in one or more of the upper layer signaling simultaneousU-TCI-UpdateList1, simultaneousU-TCI-UpdateList2, simultaneousU-TCI-UpdateList3, or simultaneousU-TCI-UpdateList4, the MAC-CE can be applied to all serving cells included in one or more of the lists simultaneousU-TCI-UpdateList1, simultaneousU-TCI-UpdateList2, simultaneousU-TCI-UpdateList3, or simultaneousU-TCI-UpdateList4 that include the serving cell indicated by this field.

[0196] - DL BWP ID (12-05): This field can indicate which DL BWP the corresponding MAC-CE applies to, and the meaning of each code point in this field can correspond to each code point of the bandwidth part indicator in the DCI. The length of this field can be 2 bits.

[0197] - UL BWP ID (12-10): This field can indicate which UL BWP the MAC-CE applies to, and the meaning of each code point in this field can correspond to each code point of the bandwidth part indicator in the DCI. The length of this field can be 2 bits.

[0198] - P i (12-15): This field can indicate whether each code point in the TCI state field in DCI format 1_1 or 1_2 has multiple TCI states or a single TCI state. If P i If the value of is 1, it means that the corresponding i-th code point has multiple TCI states, which may mean that the corresponding code point may contain a separate DL TCI state and a separate UL TCI state. If P i If the value is 0, it means that the corresponding ith code point has a single TCI state, which may mean that the corresponding code point may contain either a joint TCI state, a separate DCI TCI state, or a separate UL TCI state.

[0199] - D / U (12-20): This field can 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 can 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 can be a separate UL TCI state.

[0200] - TCI state ID (12-25): This field can indicate a TCI state that can be identified by the upper layer signaling TCI-StateId. If the D / U field is set to 1, this field can be used to express the TCI-StateId, which can be expressed in 7 bits. If the D / U field is set to 0, the MSB (most significant bit) of this field can be considered a reserved bit, and the remaining 6 bits can be used to express the upper layer signaling UL-TCIState-Id. The maximum number of TCI states that can be activated is 8 for a joint TCI state and 16 for separate DL or UL TCI states.

[0201] - R (12-30): Indicates reserved bits and can be set to 0.

[0202] For the MAC-CE structure of FIG. 12 described above, the terminal can include the third octet including the P1, P2, ..., P8 fields in FIG. 12 in the MAC-CE structure, regardless of whether unifiedTCI-StateType-r17 in MIMOparam-r17 in ServingCellConfig, which is an upper layer signaling, is set to joint or separate. In this case, the terminal can perform TCI state activation using the fixed MAC-CE structure regardless of the upper layer signaling set by the base station. As another example, for the MAC-CE structure of FIG. 12 described above, the terminal can omit the third octet including the P1, P2, ..., P8 fields in FIG. 12 when unifiedTCI-StateType-r17 in MIMOparam-r17 in ServingCellConfig, which is an upper layer signaling, is set to joint. In this case, the terminal can save up to 8 bits of the payload of the corresponding MAC-CE according to the upper layer signaling set by the base station. In addition, all D / U fields located from the fourth octet to the first bit in Fig. 12 can be regarded as R fields, and all corresponding R fields can be set to 0 bits.

[0203] [PUSCH: Transmission Method Related]

[0204] Next, we describe the scheduling method for PUSCH transmission. PUSCH transmission can be dynamically scheduled by the UL grant within the DCI or can operate by configured grant Type 1 or Type 2. Dynamic scheduling instructions for PUSCH transmission are possible in DCI format 0_0 or 0_1.

[0205] Configured grant Type 1 PUSCH transmission can be semi-statically configured by receiving configuredGrantConfig including rrc-ConfiguredUplinkGrant of [Table 19] through higher-order signaling, without receiving UL grant in DCI. Configured grant Type 2 PUSCH transmission can be semi-persistently scheduled by UL grant in DCI after receiving configuredGrantConfig not including rrc-ConfiguredUplinkGrant of [Table 19] through higher-order signaling. When PUSCH transmission operates by configured grant, parameters applied to PUSCH transmission are applied through configuredGrantConfig of higher-order signaling of [Table 19], except for dataScramblingIdentityPUSCH, txConfig, codebookSubset, maxRank, and scaling of UCI-OnPUSCH provided by pusch-Config of [Table 20]. If the terminal has been provided with transformPrecoder in configuredGrantConfig, which is the upper signaling of [Table 19], the terminal applies tp-pi2BPSK in pusch-Config of [Table 20] to PUSCH transmission operated by the configured grant.

[0206] ConfiguredGrantConfig ::= SEQUENCE {frequencyHopping ENUMERATED {intraSlot, interSlot} OPTIONAL, -- Need S,cg-DMRS-Configuration DMRS-UplinkConfig,mcs-Table ENUMERATED {qam256, qam64LowSE} OPTIONAL, -- Need Smcs-TableTransformPrecoder ENUMERATED {qam256, qam64LowSE} OPTIONAL, -- Need Suci-OnPUSCH SetupRelease { CG-UCI-OnPUSCH} OPTIONAL, -- Need MresourceAllocation ENUMERATED { resourceAllocationType0, resourceAllocationType1, dynamicSwitch},rbg-Size ENUMERATED {config2} OPTIONAL, -- Need SpowerControlLoopToUse ENUMERATED {n0, n1},p0-PUSCH-Alpha P0-PUSCH-AlphaSetId,transformPrecoder ENUMERATED {enabled, disabled} OPTIONAL, -- Need SnrofHARQ-Processes INTEGER(1..16),repK ENUMERATED {n1, n2, n4, n8},repK-RV ENUMERATED {s1-0231, s2-0303, s3-0000} OPTIONAL, -- Need Rperiodicity ENUMERATED {sym2, sym7, sym1x14, sym2x14, sym4x14, sym5x14, sym8x14, sym10x14, sym16x14, sym20x14,sym32x14, sym40x14, sym64x14, sym80x14, sym128x14, sym160x14, sym256x14, sym320x14, sym512x14,sym640x14, sym1024x14, sym1280x14, sym2560x14, sym5120x14,sym6, sym1x12, sym2x12, sym4x12, sym5x12, sym8x12, sym10x12, sym16x12, sym20x12, sym32x12,sym40x12, sym64x12, sym80x12, sym128x12, sym160x12, sym256x12, sym320x12, sym512x12, sym640x12,sym1280x12, sym2560x12},configuredGrantTimer INTEGER (1..64) OPTIONAL, -- Need Rrrc-ConfiguredUplinkGrant SEQUENCE {timeDomainOffset INTEGER (0..5119),timeDomainAllocation INTEGER (0..15),frequencyDomainAllocation BIT STRING (SIZE(18)),antennaPort INTEGER (0..31),dmrs-SeqInitialization INTEGER (0..1) OPTIONAL, -- Need RprecodingAndNumberOfLayers INTEGER (0..63),srs-ResourceIndicator INTEGER (0..15) OPTIONAL, -- Need RmcsAndTBS INTEGER (0..31),frequencyHoppingOffset INTEGER (1.. maxNrofPhysicalResourceBlocks-1) OPTIONAL, -- Need RpathlossReferenceIndex INTEGER (0..maxNrofPUSCH-PathlossReferenceRSs-1),...} OPTIONAL, -- Need R...}.

[0207] Next, the PUSCH transmission method is described. The DMRS antenna port for PUSCH transmission is the same as the antenna port for SRS transmission. PUSCH transmission can follow a codebook-based transmission method or a non-codebook-based transmission method, respectively, depending on whether the value of txConfig in the upper signaling pusch-Config of [Table 20] is 'codebook' or 'nonCodebook'. As described above, PUSCH transmission can be dynamically scheduled through DCI format 0_0 or 0_1, and can be semi-statically configured by a configured grant. If the UE is instructed to schedule PUSCH transmission through DCI format 0_0, the UE performs beam configuration for PUSCH transmission using the pucch-spatialRelationInfoID corresponding to the UE-specific PUCCH resource corresponding to the minimum ID in the activated uplink BWP in the serving cell, and at this time, the PUSCH transmission is based on a single antenna port. The UE does not expect scheduling for PUSCH transmission via DCI format 0_0 within a BWP where a PUCCH resource including pucch-spatialRelationInfo is not configured. If the UE does not receive txConfig in pusch-Config of [Table 20], the UE does not expect scheduling via DCI format 0_1.

[0208] PUSCH-Config ::= SEQUENCE {dataScramblingIdentityPUSCH INTEGER (0..1023) OPTIONAL, -- Need StxConfig ENUMERATED {codebook, nonCodebook} OPTIONAL, -- Need Sdmrs-UplinkForPUSCH-MappingTypeA SetupRelease { DMRS-UplinkConfig} OPTIONAL, -- Need Mdmrs-UplinkForPUSCH-MappingTypeB SetupRelease { DMRS-UplinkConfig} OPTIONAL, -- Need Mpusch-PowerControl PUSCH-PowerControl OPTIONAL, -- Need MfrequencyHopping ENUMERATED {intraSlot, interSlot} OPTIONAL, -- Need SfrequencyHoppingOffsetLists SEQUENCE (SIZE (1..4)) OF INTEGER (1..maxNrofPhysicalResourceBlocks-1)OPTIONAL, -- Need MresourceAllocation ENUMERATED { resourceAllocationType0, resourceAllocationType1, dynamicSwitch},pusch-TimeDomainAllocationList SetupRelease { PUSCH-TimeDomainResourceAllocationList} OPTIONAL, -- Need Mpusch-AggregationFactor ENUMERATED { n2, n4, n8} OPTIONAL, -- Need Smcs-Table ENUMERATED {qam256, qam64LowSE} OPTIONAL, -- Need Smcs-TableTransformPrecoder ENUMERATED {qam256, qam64LowSE} OPTIONAL, -- Need StransformPrecoder ENUMERATED {enabled, disabled} OPTIONAL, -- Need ScodebookSubset ENUMERATED {fullyAndPartialAndNonCoherent, partialAndNonCoherent,nonCoherent}OPTIONAL, -- Cond codebookBasedmaxRank INTEGER (1..4) OPTIONAL, -- Cond codebookBasedrbg-Size ENUMERATED { config2} OPTIONAL, -- Need Suci-OnPUSCH SetupRelease { UCI-OnPUSCH} OPTIONAL, -- Need Mtp-pi2BPSK ENUMERATED {enabled} OPTIONAL, -- Need S...}.

[0209] Next, we describe codebook-based PUSCH transmission. Codebook-based PUSCH transmission can be dynamically scheduled via DCI format 0_0 or 0_1, or can operate semi-statically based on a configured grant. When codebook-based PUSCH is dynamically scheduled via DCI format 0_1 ​​or semi-statically configured via a configured grant, the UE determines a precoder for PUSCH transmission based on the SRS Resource Indicator (SRI), Transmission Precoding Matrix Indicator (TPMI), and transmission rank (the number of PUSCH transmission layers). At this time, the SRI can be provided via the SRS resource indicator field in the DCI or configured via the srs-ResourceIndicator higher-level signaling. When performing codebook-based PUSCH transmission, the UE is configured with at least one SRS resource, and can be configured with up to two. When a UE receives an SRI through DCI, the SRS resource indicated by the SRI refers to an SRS resource corresponding to the SRI among the SRS resources transmitted before the PDCCH containing the SRI. In addition, the TPMI and transmission rank can be provided through the fields precoding information and number of layers in the DCI, or can be configured through the higher-level signaling precodingAndNumberOfLayers. The TPMI is used to indicate the precoder applied to PUSCH transmission. If the UE is configured with one SRS resource, the TPMI is used to indicate the precoder to be applied to the configured one SRS resource.When multiple SRS resources are configured for the UE, the TPMI is used to indicate the precoder to be applied in the SRS resource indicated by the SRI. The precoder to be used for PUSCH transmission is selected from an uplink codebook having the same number of antenna ports as the nrofSRS-Ports value in the upper layer signaling, SRS-Config. In codebook-based PUSCH transmission, the UE determines the codebook subset based on the TPMI and the codebookSubset in the upper layer signaling, pusch-Config. The codebookSubset in the upper layer signaling, pusch-Config, can be set to one of 'fullyAndPartialAndNonCoherent', 'partialAndNonCoherent', or 'nonCoherent' based on the UE capability reported by the UE to the base station. If the UE reported 'partialAndNonCoherent' as the UE capability, the UE does not expect the value of the upper layer signaling, codebookSubset, to be set to 'fullyAndPartialAndNonCoherent'. Additionally, if the UE reports 'nonCoherent' as the UE capability, the UE does not expect the value of the upper signaling codebookSubset to be set to 'fullyAndPartialAndNonCoherent' or 'partialAndNonCoherent'. If nrofSRS-Ports in the upper signaling SRS-ResourceSet points to two SRS antenna ports, the UE does not expect the value of the upper signaling codebookSubset to be set to 'partialAndNonCoherent'.

[0210] The terminal can be configured with one SRS resource set in which the usage value in the upper signaling SRS-ResourceSet is set to 'codebook', and one SRS resource in the SRS resource set can be indicated via SRI. If multiple SRS resources are configured in the SRS resource set in which the usage value in the upper signaling SRS-ResourceSet is set to 'codebook', the terminal expects that the value of nrofSRS-Ports in the upper signaling SRS-Resource is set to the same value for all SRS resources.

[0211] The terminal transmits to the base station one or more SRS resources included in the SRS resource set in which the usage value is set to 'codebook' according to upper signaling, and the base station selects one of the SRS resources transmitted by the terminal and instructs the terminal to perform PUSCH transmission using transmission beam information of the corresponding SRS resource. At this time, in codebook-based PUSCH transmission, the SRI is used as information for selecting an index of one SRS resource and is included in the DCI. Additionally, the base station includes in the DCI information indicating the TPMI and rank to be used by the terminal for PUSCH transmission. The terminal performs PUSCH transmission by applying the indicated rank and the precoder indicated by the TPMI based on the transmission beam of the corresponding SRS resource using the SRS resource indicated by the SRI.

[0212] Next, we describe non-codebook-based PUSCH transmission. Non-codebook-based PUSCH transmission can be dynamically scheduled via DCI format 0_0 or 0_1, and can operate semi-statically based on a configured grant. If at least one SRS resource is configured within an SRS resource set in which the usage value in the upper signaling, SRS-ResourceSet, is set to 'nonCodebook', the UE can be scheduled for non-codebook-based PUSCH transmission via DCI format 0_1.

[0213] For an SRS resource set in which the usage value in the upper signaling SRS-ResourceSet is set to 'nonCodebook', the UE can be configured with one connected NZP CSI-RS resource (non-zero power CSI-RS). The UE can perform calculations for a precoder for SRS transmission by measuring the NZP CSI-RS resource 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 at the UE is less than 42 symbols, the UE does not expect information about the precoder for SRS transmission to be updated.

[0214] If the value of resourceType in the upper signaling SRS-ResourceSet is set to 'aperiodic', the connected NZP CSI-RS is indicated by the SRS request field in DCI format 0_1 ​​or 1_1. At this time, if the connected NZP CSI-RS resource is an aperiodic NZP CSI-RS resource, the presence of the connected NZP CSI-RS is indicated when the value of the SRS request field in DCI format 0_1 ​​or 1_1 is not '00'. At this time, the DCI must not indicate cross-carrier or cross BWP scheduling. In addition, if the value of the SRS request indicates the presence of an NZP CSI-RS, the NZP CSI-RS is located in the slot in which the PDCCH including the SRS request field is transmitted. At this time, the TCI states set for the scheduled subcarriers are not set to QCL-TypeD.

[0215] If a periodic or semi-persistent SRS resource set is configured, the associated NZP CSI-RS can be indicated through the associatedCSI-RS in the upper-level signaling SRS-ResourceSet. For non-codebook-based transmission, the UE does not expect the upper-level signaling spatialRelationInfo for the SRS resource and the associatedCSI-RS in the upper-level signaling SRS-ResourceSet to be configured together.

[0216] When multiple SRS resources are configured, the UE can determine the precoder and transmission rank to be applied to PUSCH transmission based on the SRI indicated by the base station. At this time, the SRI can be indicated through the SRS resource indicator field in the DCI or can be configured through the upper signaling srs-ResourceIndicator. Similar to the codebook-based PUSCH transmission described above, when the UE receives an SRI through 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 containing the SRI. The UE can use one or more SRS resources for SRS transmission, and the maximum number of SRS resources that can be simultaneously transmitted in the same symbol within one SRS resource set and the maximum number of SRS resources are determined by the UE capability reported by the UE to the base station. At this time, the SRS resources that the UE simultaneously transmits occupy the same RB. The UE configures one SRS port for each SRS resource. Only one SRS resource set with the usage value set to 'nonCodebook' in the upper signaling SRS-ResourceSet can be set, and up to four SRS resources for non-codebook based PUSCH transmission can be set.

[0217] The base station transmits one NZP-CSI-RS associated with an SRS resource set to the terminal, and the terminal calculates a precoder to be used when transmitting one or more SRS resources within the SRS resource set based on the result measured upon reception of the NZP-CSI-RS. When the terminal transmits one or more SRS resources within the SRS resource set with usage set to 'nonCodebook' to the base station, the terminal applies the calculated precoder, and the base station selects one or more SRS resources from the received one or more SRS resources. At this time, in non-codebook based PUSCH transmission, the SRI represents an index that can express a combination of one or more SRS resources, and the SRI is included in the DCI. At this time, the number of SRS resources indicated by the SRI transmitted by the base station can be the number of transmission layers of the PUSCH, and the terminal transmits the PUSCH by applying the precoder applied to SRS resource transmission to each layer.

[0218] [PUSCH: Repetitive Transmission Related]

[0219] The following describes in detail the repetitive transmission of uplink data channels in 5G systems. 5G systems support two types of repetitive transmission methods for uplink data channels: PUSCH repetitive transmission type A and PUSCH repetitive transmission type B. A terminal can be configured with either PUSCH repetitive transmission type A or B via upper layer signaling.

[0220] PUSCH repetitive transmission type A

[0221] - As described above, the symbol length and the position of the start symbol of the uplink data channel are determined by the time domain resource allocation method within one slot, and the base station can notify the terminal of the number of repeated transmissions through upper layer signaling (e.g. RRC signaling) or L1 signaling (e.g. DCI).

[0222] - The terminal can repeatedly transmit an uplink data channel with the same length and start symbol as the uplink data channel set based on the number of repeated transmissions received from the base station in consecutive slots. In this case, if at least one symbol among the slots set by the base station to the terminal as downlink or the symbols of the uplink data channel set to the terminal is set as downlink, the terminal skips the uplink data channel transmission, but counts the number of repeated transmissions of the uplink data channel.

[0223] PUSCH repetitive transmission type B

[0224] - As described above, the start symbol and length of the uplink data channel are determined by a time domain resource allocation method within one slot, and the base station can notify the terminal of the number of repetitions through upper signaling (e.g., RRC signaling) or L1 signaling (e.g., DCI).

[0225] - First, the nominal repetition of the uplink data channel is determined based on the start symbol and length of the established uplink data channel as follows. The slot where the nth nominal repetition starts is The symbol given by and starting from that slot is is given by . The slot where the nth nominal repetition ends is The symbol given by and ending in that slot is is given by . Here, n=0, ..., numberofrepetitions-1, S represents the start symbol of the established uplink data channel, and L represents the symbol length of the established uplink data channel. indicates the slot in which the PUSCH transmission starts. Indicates the number of symbols per slot.

[0226] - The UE determines an invalid symbol for PUSCH repetition transmission type B. A symbol configured for downlink by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated is determined as an invalid symbol for PUSCH repetition transmission type B. Additionally, an invalid symbol can be configured in a higher layer parameter (e.g., InvalidSymbolPattern). The higher layer parameter (e.g., InvalidSymbolPattern) provides a symbol-level bitmap spanning one or two slots, where an invalid symbol can be configured. 1 in the bitmap indicates an invalid symbol. Additionally, the period and pattern of the bitmap can be configured through a higher layer parameter (e.g., periodicityAndPattern). If a higher layer parameter (e.g., InvalidSymbolPattern) is set and the InvalidSymbolPatternIndicator-ForDCIFormat0_1 or InvalidSymbolPatternIndicator-ForDCIFormat0_2 parameter indicates 1, the terminal applies an invalid symbol pattern, and if the parameter indicates 0, the terminal does not apply the invalid symbol pattern. If a higher layer parameter (e.g., InvalidSymbolPattern) is set and the InvalidSymbolPatternIndicator-ForDCIFormat0_1 or InvalidSymbolPatternIndicator-ForDCIFormat0_2 parameter is not set, the terminal applies an invalid symbol pattern.

[0227] After determining invalid symbols, the terminal may consider symbols other than invalid symbols as valid symbols for each nominal repetition. If each nominal repetition includes at least one valid symbol, the nominal repetition may include one or more actual repetitions. Here, each actual repetition includes a contiguous set of valid symbols that can be used for PUSCH repetitive transmission type B within a single slot.

[0228] Additionally, for PUSCH repetitive transmissions, NR Release 16 can define the following additional methods for UL grant-based PUSCH transmissions across slot boundaries and configured grant-based PUSCH transmissions:

[0229] - Method 1 (mini-slot level repetition): Two or more PUSCH repetitive transmissions are scheduled within a slot or across the boundaries of consecutive slots through a single UL grant. In addition, for Method 1, the time-domain resource allocation information in the DCI indicates the resources of the first repetitive transmission. In addition, the time-domain resource information of the first repetitive transmission and the time-domain resource information of the remaining repetitive transmissions can be determined based on the uplink or downlink direction determined for each symbol in each slot. Each repetitive transmission occupies consecutive symbols.

[0230] - Method 2 (multi-segment transmission): Two or more repeated PUSCH transmissions are scheduled in consecutive slots through a single UL grant. At this time, one transmission is designated for each slot, and each transmission may have a different starting point or repetition length. In addition, in Method 2, the time-domain resource allocation information in the DCI indicates the starting point and repetition length of all repeated transmissions. In addition, when performing repeated transmissions in a single slot through Method 2, if there are multiple sets of consecutive uplink symbols in the slot, each repeated transmission is performed for each set of uplink symbols. If there is only one set of consecutive uplink symbols in the slot, one repeated PUSCH transmission is performed according to the method of NR Release 15.

[0231] - Method 3: Two or more repeated PUSCH transmissions are scheduled in consecutive slots via two or more UL grants. In this case, one transmission is designated for each slot, and the nth UL grant can be received before the PUSCH transmission scheduled for the n-1th UL grant ends.

[0232] - Method 4: One or more PUSCH repetitive transmissions within a single slot, or two or more PUSCH repetitive transmissions across the boundaries of consecutive slots, can be supported through one UL grant or one configured grant. The number of repetitions indicated by the base station to the terminal is only a nominal value, and the number of PUSCH repetitive 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 the configured grant indicates the resources of the first repetitive transmission indicated by the base station. The time-domain resource information of the remaining repetitive transmissions can be determined by referring to at least the resource information of the first repetitive transmission and the uplink or downlink direction of the symbols. If the time-domain resource information of the repetitive transmission indicated by the base station crosses a slot boundary or includes an uplink / downlink switchover point, the repetitive transmission can be divided into multiple repetitive transmissions. In this case, one repetitive transmission can be included for each uplink period within one slot.

[0233] The above-described repetitive transmission can be applied to both DG (Dynamic Grant) PUSCH and CG (Configured Grant) PUSCH. DG PUSCH is a method in which all PUSCH scheduling information is provided by DCI, and CG PUSCH means a method in which PUSCH scheduling information is provided only by higher-order signals or by some DCI. In addition, DG PUSCH is a method in which a terminal transmits PUSCH only in the scheduling region provided by DCI, and CG PUSCH is a method in which a terminal periodically transmits PUSCH without receiving a separate DCI according to a period set by a higher-order signal.

[0234] [PUSCH: Transmission Power Related]

[0235] As an example of the present disclosure, when uplink data is transmitted through an uplink data channel (PUSCH; Physical Uplink Shared Channel) in response to a power control command received from a base station, a method for transmitting by setting the transmission power of the uplink data channel by a terminal is described. The uplink data channel transmission power of the terminal can be determined as shown in [Mathematical Formula 1] below, expressed in units of dBm, together with the i-th transmission unit, the parameter set configuration index j, and the PUSCH power control adjustment state corresponding to the closed loop index l. In [Mathematical Formula 1] below, when the terminal supports multiple carrier frequencies in multiple cells, each parameter can be set for each cell c, each carrier frequency f, and each bandwidth part b, and can be distinguished by indices b, f, and c.

[0236] [Mathematical Formula 1]

[0237]

[0238] - : The maximum transmission power available to the terminal in the i-th transmission unit is determined by the power class of the terminal, parameters activated from the base station, and various parameters built into the terminal.

[0239] - : Is and It consists of the sum of . is set to cell-specific upper layer signaling to the terminal, is a value set by terminal-specific upper layer signaling. Here, when j=0, it means PUSCH for transmitting msg3, when j=1, it means configured grant PUSCH, and when j={2, ...,J-1} is one of the values, it means grant PUSCH.

[0240] - : Subcarrier spacing configuration value

[0241] - : It may mean the amount of resources used in the i-th PUSCH transmission unit (e.g., the number of Resource Blocks (RBs) used for PUSCH transmission on the frequency axis).

[0242] - This refers to a value that can be determined (in the case of dynamic grant PUSCH) through upper layer settings and SRI (SRS Resource Indicator) as a value to compensate for path loss.

[0243] - : Pathloss is the path loss between the base station and the terminal, and the terminal uses the reference signal (RS) resource signaled by the base station. The path loss is calculated from the difference between the transmission power and the terminal reception signal level of the reference signal. The reference signal index is It refers to the downlink path loss estimate estimated by the terminal through the reference signal and the reference signal index. The UE can decide this via upper layer configuration and SRI (in case of dynamic grant PUSCH or configured grant PUSCH based on ConfiguredGrantConfig that does not include upper layer configuration rrc-ConfiguredUplinkGrant (type 2 configured grant PUSCH)) or via upper layer configuration.

[0244] - : It refers to a value determined according to the MCS (Modulation Coding Scheme) and the format of information transmitted via PUSCH (TF: transport format, e.g., whether UL-SCH is included or CSI is included, etc.).

[0245] - : Refers to a value for a closed loop index that can be determined by a higher layer setting and SRI for PUSCH as a closed loop power control adjustment value. Here, the closed loop power adjustment for PUSCH transmission can be supported by dividing into an accumulation method that accumulates and applies a value indicated by a TPC command and an absolute method that directly applies the value indicated by the TPC command, and this can be determined depending on whether the higher layer parameter tpc-Accumulation is set. If the higher layer parameter tpc-Accumulation is set to disabled, the closed loop power adjustment for PUSCH transmission is performed by the absolute method, and if tpc-Accumulation is not set, the closed loop power adjustment for PUSCH transmission is performed by the accumulation method.

[0246] PUSCH power control adjustment status can be determined through the bandwidth part b, carrier frequency f, cell c, i-th transmission unit, and closed loop index l.

[0247] - : A value indicated by a TPC command field included in DCI format 0_0, 0_1, or 0_2 that schedules the i-th PUSCH transmission unit corresponding to the closed loop index l within the bandwidth part b, carrier frequency f, and cell c, or a value indicated by a TPC command field included in DCI format 2_2 transmitted together with a CRC scrambled with TPC-PUSCH-RNTI.

[0248] o If the terminal has received the upper layer signaling twoPUSCH-PC-AdjustmentStates, the closed loop index l can have the value 0 or 1.

[0249] o If the terminal has not received the upper layer signaling twoPUSCH-PC-AdjustmentStates or has been scheduled for PUSCH transmission based on RAR UL grant, the closed loop index l may have a value of 0.

[0250] ● If the terminal has set ConfiguredGrantConfig, which is a higher layer signaling, and performs PUSCH transmission or retransmission, the closed loop index l can follow the powerControlLoopToUse value, which is a higher layer signaling.

[0251] ● If the terminal has been configured with the upper layer signaling SRI-PUSCH-PowerControl, the terminal can obtain a connection relationship between the value indicated by the SRI (SRS resource indicator) field in the DCI format that schedules PUSCH transmission and the closed loop index l configured through the upper layer signaling sri-PUSCH-ClosedLoopIndex, and can determine the closed loop index l based on the value indicated by the SRI field in the DCI format based on the connection relationship.

[0252] ● If the terminal is scheduled for PUSCH transmission based on a DCI format that does not include the SRI field, or if the upper layer signaling SRI-PUSCH-PowerControl is not set, the terminal may regard the closed loop index as 0.

[0253] ● If the terminal is indicated with a TPC command value through a TPC command field included in DCI format 2_2 transmitted with a CRC scrambled with TPC-PUSCH-RNTI, the closed loop index l can be indicated through the closed loop index field included in DCI format 2_2.

[0254] - If the terminal has not been set up with the upper layer signaling tpc-Accumulation, i.e., if the TPC command accumulation operation is possible for the terminal, the PUSCH power control adjustment state for the i-th PUSCH transmission unit corresponding to the closed loop index l within the bandwidth part b, carrier frequency f, and cell c. can be calculated as in [Mathematical Formula 2].

[0255] [Equation 2]

[0256]

[0257] o As described above, the TPC command field included in DCI format 0_0, 0_1, or 0_2 that schedules the m-th PUSCH transmission unit corresponding to the closed loop index l within the bandwidth part b, carrier frequency f, and cell c may be a value indicated by the TPC command field included in DCI format 2_2 transmitted together with the CRC scrambled with TPC-PUSCH-RNTI. If the TPC command accumulation operation is possible, The value may have a corresponding value in [dB] units depending on which value the TPC command field included in the DCI format 0_0, 0_1, 0_2, or 2_2 is indicated as in [Table 1] below. For example, if the value of the TPC command field is 0, can have a value of -1 dB.

[0258] o is a specific set of the TPC command values ​​described above. For all transmission units corresponding to mine can mean the sum of . At this time is a set It can mean the number of all elements belonging to me. may mean a set of DCIs including all TPC command values ​​for which a TPC command accumulation operation is to be performed for the i-th PUSCH transmission unit. To determine the starting point and the ending point in the time dimension, all DCIs received by the terminal within the two points are defined. can be included as an element of .

[0259] ● The end point for determining is from the start symbol of the i-th PUSCH transmission unit. It could be as far back as the symbol.

[0260] ● The starting point for deciding is From the start symbol of the th PUSCH transmission unit It can be a point as far back as the symbol. In this case, a positive integer is above The end point for determining (from the start symbol of the i-th PUSCH transmission unit) (as much as the previous point) than the symbol, From the start symbol of the th PUSCH transmission unit It can be determined as the smallest value that satisfies that the previous time point becomes an earlier time point in time by a symbol.

[0261] ● For example, The end point for determining can be defined as sym(i), From the start symbol of the th PUSCH transmission unit The time point before the symbol is sym( ), if sym(i) = sym(i-1) > sym(i- 2) > sym(i-3) holds, then i0 can be determined as 2.

[0262] - If the terminal has been set to the upper layer signaling tpc-Accumulation, i.e., if the TPC command accumulation operation is not possible for the terminal, the PUSCH power control adjustment state for the i-th PUSCH transmission unit corresponding to the closed loop index l within the bandwidth part b, carrier frequency f, and cell c. can be calculated as in [Mathematical Formula 3].

[0263] [Equation 3]

[0264]

[0265] o As described above, the TPC command field included in DCI format 0_0, 0_1, or 0_2 that schedules the i-th PUSCH transmission unit corresponding to the closed loop index l within the bandwidth part b, carrier frequency f, and cell c may be a value indicated by the TPC command field included in DCI format 2_2 transmitted together with the CRC scrambled with TPC-PUSCH-RNTI. If the TPC command accumulation operation is impossible, The value may have a corresponding value in [dB] units depending on which value the TPC command field included in the DCI format 0_0, 0_1, 0_2, or 2_2 is indicated as in [Table 21] below. For example, if the value of the TPC command field is 0, can have a value of -4 dB.

[0266] TPC command fieldAccumulated [dB]Absolute [dB]0-1-410-1211334

[0267] [SRS related]

[0268] Next, we describe an uplink channel estimation method using the Sounding Reference Signal (SRS) transmission of a terminal. The base station can configure at least one SRS configuration for each uplink BWP to convey 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 exchange the following upper-level signaling information to convey information regarding the SRS resource set.

[0269] - srs-ResourceSetId: SRS resource set index

[0270] - srs-ResourceIdList: A set of SRS resource indices referenced in the SRS resource set.

[0271] - resourceType: This is the time axis transmission setting of the SRS resource referenced in the SRS resource set, and can be set to one of 'periodic', 'semi-persistent', and 'aperiodic'. If set to 'periodic' or 'semi-persistent', associated CSI-RS information can be provided depending on the usage of the SRS resource set. If set to 'aperiodic', an aperiodic SRS resource trigger list and slot offset information can be provided, and associated CSI-RS information can be provided depending on the usage of the SRS resource set.

[0272] - usage: This is a setting for the usage of the SRS resource referenced in the SRS resource set, and can be set to one of 'beamManagement', 'codebook', 'nonCodebook', and 'antennaSwitching'.

[0273] - alpha, p0, pathlossReferenceRS, srs-PowerControlAdjustmentStates: Provides parameter settings for adjusting the transmission power of the SRS resource referenced in the SRS resource set.

[0274] The terminal can understand that the SRS resource included in the set of SRS resource indices referenced in the SRS resource set follows the information set in the SRS resource set.

[0275] In addition, the base station and the terminal can transmit and receive upper layer signaling information to convey individual configuration information for the SRS resource. For example, the individual configuration information for the SRS resource can include time-frequency axis mapping information within the slot of the SRS resource, which can include information about frequency hopping within or between slots of the SRS resource. In addition, the individual configuration information for the SRS resource can include the time axis transmission configuration of the SRS resource, which can be set to one of 'periodic', 'semi-persistent', and 'aperiodic'. This can be restricted to have the same time axis transmission configuration as the SRS resource set including the SRS resource. If the time axis transmission configuration of the SRS resource is set to 'periodic' or 'semi-persistent', the SRS resource transmission period and slot offset (e.g., periodicityAndOffset) can additionally be included in the time axis transmission configuration.

[0276] The base station can activate, deactivate, or trigger SRS transmission to the UE through higher layer signaling, including RRC signaling or MAC CE signaling, or L1 signaling (e.g., DCI). For example, the base station can activate or deactivate periodic SRS transmission to the UE through higher layer signaling. The base station can instruct the UE to activate an SRS resource set with resourceType set to periodic through higher layer signaling, and the UE can transmit an SRS resource referenced in the activated SRS resource set. The time-frequency domain resource mapping within the slot of the transmitted SRS resource follows the resource mapping information set in the SRS resource, and the slot mapping, including the transmission period and slot offset, follows the periodicityAndOffset set in the SRS resource. In addition, the spatial domain transmission filter applied to the transmitted SRS resource can refer to the spatial relation information set in the SRS resource, or the associated CSI-RS information set in the SRS resource set that includes the SRS resource. A terminal can transmit SRS resources within an activated uplink BWP for periodic SRS resources activated through upper layer signaling.

[0277] For example, a base station can activate or deactivate semi-persistent SRS transmission to a terminal through upper layer signaling. The base station can instruct the terminal to activate an SRS resource set through MAC CE signaling, and the terminal can transmit an SRS resource referenced in the activated SRS resource set. The SRS resource set activated through MAC CE signaling can be limited to an SRS resource set with resourceType set to semi-persistent. The time-frequency domain resource mapping within the slot of the transmitted SRS resource follows the resource mapping information configured in the SRS resource, and the slot mapping including the transmission period and slot offset follows the periodicityAndOffset configured in the SRS resource. In addition, the spatial domain transmission filter applied to the transmitted SRS resource can refer to the spatial relation information configured in the SRS resource, or the associated CSI-RS information configured in the SRS resource set that includes the SRS resource. If spatial relation info is configured in an SRS resource, the spatial domain transmission filter can be determined by referring to the configuration information for spatial relation info transmitted through MAC CE signaling that activates semi-persistent SRS transmission without following it. The terminal can transmit SRS resources within the activated uplink BWP for the semi-persistent SRS resource activated through upper layer signaling.

[0278] For example, a base station can trigger aperiodic SRS transmission to a terminal via DCI. The base station can indicate one of the aperiodic SRS resource triggers (aperiodicSRS-ResourceTrigger) via the SRS request field of the DCI. The terminal can understand that an SRS resource set including the aperiodic SRS resource trigger indicated via DCI in the aperiodic SRS resource trigger list among the configuration information of the SRS resource set has been triggered. The terminal can transmit an SRS resource referenced in the triggered SRS resource set. The time-frequency domain resource mapping within the slot of the transmitted SRS resource follows the resource mapping information configured in the SRS resource. In addition, the slot mapping of the transmitted SRS resource can be determined through a slot offset between a PDCCH including the DCI and the SRS resource, which can refer to value(s) included in a slot offset set configured in the SRS resource set. Specifically, the slot offset between the PDCCH including DCI and the SRS resource can be applied by applying the value indicated in the time domain resource assignment field of the DCI among the offset value(s) included in the slot offset set configured in the SRS resource set. In addition, the spatial domain transmission filter applied to the transmitted SRS resource can refer to the spatial relation 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 UE can transmit the SRS resource within the activated uplink BWP for the aperiodic SRS resource triggered through the DCI.

[0279] When a base station triggers aperiodic SRS transmission to a terminal through DCI, a minimum time interval may be required between a PDCCH including the DCI that triggers aperiodic SRS transmission and the SRS to be transmitted, so that the terminal can transmit the SRS by applying configuration information for the SRS resource. 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 aperiodic SRS transmission and the first symbol to which the first SRS resource to be transmitted among the SRS resource(s) is mapped. The minimum time interval can be determined with reference to the PUSCH preparation procedure time required for the terminal to prepare for PUSCH transmission. In addition, the minimum time interval can have different values ​​depending on the usage of the SRS resource set including the SRS resource to be transmitted. For example, the minimum time interval can be determined as N2 symbols, which are defined by considering the terminal processing ability according to the capability of the terminal with reference to the PUSCH preparation procedure time of the terminal. In addition, considering the usage of the SRS resource set including the SRS resource being transmitted, if the usage of the SRS resource set is set to 'codebook' or 'antennaSwitching', the minimum time interval can be set to N2 symbols, and if the usage of the SRS resource set is set to 'nonCodebook' or 'beamManagement', the minimum time interval can be set to N2+14 symbols.The terminal may transmit an aperiodic SRS if the time interval for aperiodic SRS transmission is greater than or equal to the minimum time interval, and may ignore the DCI that triggers the aperiodic SRS if the time interval for aperiodic SRS transmission is less than the minimum time interval.

[0280] SRS-Resource ::= SEQUENCE {srs-ResourceId SRS-ResourceId,nrofSRS-Ports ENUMERATED {port1, ports2, ports4},ptrs-PortIndex ENUMERATED {n0, n1} OPTIONAL, -- Need RtransmissionComb CHOICE {n2 SEQUENCE {combOffset-n2 INTEGER (0..1),cyclicShift-n2 INTEGER (0..7)},n4 SEQUENCE {combOffset-n4 INTEGER (0..3),cyclicShift-n4 INTEGER (0..11)}},resourceMapping SEQUENCE {startPosition INTEGER (0..5),nrofSymbols ENUMERATED {n1, n2, n4},repetitionFactor ENUMERATED {n1, n2, n4}},freqDomainPosition INTEGER (0..67),freqDomainShift INTEGER (0..268),freqHopping SEQUENCE {c-SRS INTEGER (0..63),b-SRS INTEGER (0..3),b-hop INTEGER (0..3)},groupOrSequenceHopping ENUMERATED { neither, groupHopping, sequenceHopping},resourceType CHOICE {aperiodic SEQUENCE {...},semi-persistent SEQUENCE {periodicityAndOffset-sp SRS-PeriodicityAndOffset,...},periodic SEQUENCE {periodicityAndOffset-p SRS-PeriodicityAndOffset,...}},sequenceId INTEGER (0..1023),spatialRelationInfo SRS-SpatialRelationInfo OPTIONAL, -- Need R...}

[0281] The spatialRelationInfo setting information in [Table 22] above refers to a single reference signal and applies the beam information of the reference signal to the beam used for the SRS transmission. For example, the spatialRelationInfo setting may include information such as [Table 23] below.

[0282] SRS-SpatialRelationInfo ::= SEQUENCE {servingCellId ServCellIndex OPTIONAL, -- Need SreferenceSignal CHOICE {ssb-Index SSB-Index,csi-RS-Index NZP-CSI-RS-ResourceId,srs SEQUENCE {resourceId SRS-ResourceId,uplinkBWP BWP-Id}}}

[0283] Referring to the above spatialRelationInfo setting, the index of the reference signal to be referenced in order to use the beam information of a specific reference signal, i.e., the SS / PBCH block index, CSI-RS index, or SRS index can be set. The upper signaling referenceSignal is setting information indicating which beam information of which reference signal is to be referenced for the corresponding SRS transmission, ssb-Index means the index of the SS / PBCH block, csi-RS-Index means the index of the CSI-RS, and srs means the index of the SRS, respectively. If the value of the upper signaling referenceSignal is set to 'ssb-Index', the terminal can apply the reception beam used when receiving the SS / PBCH block corresponding to the ssb-Index as the transmission beam of the corresponding SRS transmission. If the value of the upper signaling referenceSignal is set to 'csi-RS-Index', the terminal can apply the reception beam used when receiving the CSI-RS corresponding to the csi-RS-Index as the transmission beam of the corresponding SRS transmission. If the value of the upper signaling referenceSignal is set to 'srs', the terminal can apply the transmission beam used when transmitting the SRS corresponding to the srs as the transmission beam of the corresponding SRS transmission. [SRS transmission power related] As an example of an embodiment of the present disclosure, when transmitting through an uplink reference signal (SRS; Sounding Reference Signal) in response to a power control command received from a base station, a method for transmitting by setting the transmission power of the uplink reference signal by the terminal is described. The uplink reference signal transmission power (P) of the terminal is set together with the SRS power control adjustment state corresponding to the i-th transmission unit and the closed loop index l. SRS) can be determined as shown in [Mathematical Formula 4] below, which is expressed in dBm units. In [Mathematical Formula 4] below, when a terminal supports multiple carrier frequencies in multiple cells, each parameter can be determined for each cell c, carrier frequency f, and bandwidth part b, and can be distinguished by indices b, f, and c.

[0284] [Equation 4]

[0285]

[0286] - : The maximum transmission power available to the terminal in the i-th transmission unit is determined by the power class of the terminal, parameters activated from the base station, and various parameters built into the terminal.

[0287] - : Bandwidth part b, carrier frequency f, can be set to p0, which is the upper layer signaling for cell c, and SRS resource set can be set through upper layer signaling, SRS-ResourceSet and SRS-ResourceSetId.

[0288] - : Subcarrier spacing configuration value

[0289] - : It can mean the amount of resources used in the i-th SRS transmission unit (e.g., the number of Resource Blocks (RBs) used for SRS transmission on the frequency axis).

[0290] - : The bandwidth part b, carrier frequency f, and cell c can be set to alpha, which is the upper layer signaling, and the SRS resource set can be set through upper layer signaling, SRS-ResourceSet and SRS-ResourceSetId.

[0291] - : Pathloss is the path loss between the base station and the terminal, and the terminal uses the reference signal (RS) resource signaled by the base station. Path loss is calculated from the difference between the transmission power and the terminal reception signal level of the reference signal.

[0292] - : It may mean the SRS power control adjustment state value for the i-th SRS transmission unit corresponding to the closed loop index l within the bandwidth part b, carrier frequency f, and cell c.

[0293] The SRS power control adjustment state can be determined through the bandwidth part b, carrier frequency f, cell c, and i-th transmission unit.

[0294] - If the terminal is configured to have the same power control adjustment state value between SRS transmission and PUSCH transmission through the upper layer signaling srs-PowerControlAdjustmentStates, the SRS power control adjustment state can be expressed as in [Mathematical Formula 5] below, and in [Mathematical Formula 5] may mean the current PUSCH power control adjustment state. In this case, through various methods of the above-described embodiment 1, can be calculated and its value It can be used by substituting it into .

[0295] [Equation 5]

[0296]

[0297] - If the terminal is not configured for PUSCH transmission in bandwidth part b, carrier frequency f, and cell c, or is configured to have separate power control adjustment state values ​​between SRS transmission and PUSCH transmission through upper layer signaling srs-PowerControlAdjustmentStates, and upper layer signaling tpc-Accumulation is not configured, the SRS power control adjustment state can be expressed regardless of closed loop l as in [Mathematical Formula 6] below.

[0298] [Equation 6]

[0299]

[0300] - : It may be a value indicated by the TPC command field included in DCI format 2_3, and the value may follow [Table 17] above.

[0301] o is a specific set of the TPC command values ​​described above. For all transmission units corresponding to mine can mean the sum of . At this time is a set It can mean the number of all elements belonging to me. may mean a set of DCIs including all TPC command values ​​for which a TPC command accumulation operation is to be performed for the i-th PUSCH transmission unit. To determine the starting point and the ending point in the time dimension, all DCIs received by the terminal within the two points are defined. can be included as an element of .

[0302] ● The end point for determining is from the start symbol of the i-th SRS transmission unit. It could be as far back as the symbol.

[0303] ● The starting point for determining is from the starting symbol of the i - i0th SRS transmission unit. It can be a point as far back as the symbol. At this time, i0, which is a positive integer, is The end point for determining (from the start symbol of the i-th SRS transmission unit) from the starting symbol of the i - i0th SRS transmission unit, It can be determined as the smallest value that satisfies that the previous time point becomes an earlier time point in time by a symbol.

[0304] ● For example, The end point for determining can be defined as sym(i), and from the start symbol of the i -i0th SRS transmission unit, If a time point that is earlier than a symbol can be defined as sym(i - i0), then if sym(i) = sym(i-1) > sym(i- 2) > sym(i-3) holds, then i0 can be determined as 2.

[0305] - If the terminal is not configured for PUSCH transmission in bandwidth part b, carrier frequency f, and cell c, or is configured to have separate power control adjustment state values ​​between SRS transmission and PUSCH transmission through upper layer signaling srs-PowerControlAdjustmentStates, and upper layer signaling tpc-Accumulation is configured (i.e., TPC command accumulation operation cannot be performed and absolute TPC command value can be applied), the SRS power control adjustment state can be expressed regardless of closed loop l as in [Mathematical Formula 7] below.

[0306] [Equation 7]

[0307]

[0308] o As described above, it may be a value indicated by the TPC command field included in the DCI format 2_3 within the bandwidth part b, carrier frequency f, and cell c, and the value may follow the above [Table 1]. For example, if the value of the TPC command field is 0, can have a value of -4 dB.

[0309] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the attached drawings. The contents of the present disclosure can be applied to FDD and TDD systems. In the present disclosure below, upper signaling (or upper layer signaling) refers to a signal transmission method in which a base station transmits a signal to a terminal using a downlink data channel of a physical layer, or a terminal transmits a signal to a base station using an uplink data channel of a physical layer, and may also be referred to as RRC signaling, PDCP signaling, or MAC (medium access control) control element (MAC control element; MAC CE).

[0310] In the present disclosure, when determining whether cooperative communication is applied, the terminal may use various methods, such as having the PDCCH(s) that allocate the PDSCH to which cooperative communication is applied have a specific format, or including a specific indicator that indicates whether cooperative communication is applied, or scrambled with a specific RNTI by the PDCCH(s) that allocate the PDSCH to which cooperative communication is applied, or assuming cooperative communication is applied in a specific section indicated by a higher layer. For the convenience of the following description, the case where the terminal receives the PDSCH to which cooperative communication is applied based on conditions similar to the above will be referred to as the NC-JT case.

[0311] In the present disclosure, determining the priority between A and B may be referred to in various ways, such as selecting a higher priority according to a predetermined priority rule and performing an action corresponding to it, or omitting or dropping an action for a lower priority.

[0312] In the following disclosure, the above examples are described through a number of embodiments, but they are not independent, and one or more embodiments may be applied simultaneously or in combination.

[0313] For convenience in the following description of the present disclosure, cells, transmission points, panels, beams, and / or transmission directions, which can be distinguished through upper layer / L1 parameters such as TCI state or spatial relation information, or indicators such as cell ID, TRP ID, and panel ID, may be uniformly described as TRP (transmission reception point), beam, or TCI state. Therefore, in actual application, TRP, beam, or TCI state can be appropriately replaced with one of the above terms.

[0314] In the present disclosure, when determining whether cooperative communication is applied, the terminal may use various methods, such as having the PDCCH(s) that allocate the PDSCH to which cooperative communication is applied have a specific format, or including a specific indicator that indicates whether cooperative communication is applied, or scrambled with a specific RNTI by the PDCCH(s) that allocate the PDSCH to which cooperative communication is applied, or assuming cooperative communication is applied in a specific section indicated by a higher layer. For the convenience of the following description, the case where the terminal receives the PDSCH to which cooperative communication is applied based on conditions similar to the above will be referred to as the NC-JT case.

[0315] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the attached drawings. Hereinafter, a base station is an entity that performs resource allocation of a terminal, and may be at least one of a gNode B, a gNB, an eNode B, a Node B, a BS (Base Station), a wireless access unit, a base station controller, or a node on a network. The terminal may include a UE (User Equipment), an MS (Mobile Station), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing a communication function. Although the embodiments of the present disclosure are described below using a 5G system as an example, the embodiments of the present disclosure may be applied to other communication systems having a similar technical background or channel type. For example, this may include LTE or LTE-A mobile communication and mobile communication technologies developed after 5G. Therefore, the embodiments of the present disclosure may be applied to other communication systems with some modifications without significantly departing from the scope of the present disclosure as determined by a person skilled in the art. The contents of the present disclosure can be applied to FDD and TDD systems.

[0316] Additionally, when describing the present disclosure, detailed descriptions of related functions or configurations will be omitted if they are deemed to unnecessarily obscure the gist of the present disclosure. Furthermore, the terms described below are defined based on the functions of the present disclosure and may vary depending on the intent or custom of the user or operator. Therefore, their definitions should be based on the contents of this specification.

[0317] In the following description of the present disclosure, upper layer signaling may be signaling corresponding to at least one or a combination of one or more of the following signaling.

[0318] - MIB (Master Information Block)

[0319] - SIB (System Information Block) or SIB

[0320] - RRC (Radio Resource Control)

[0321] - MAC (Medium Access Control) CE (Control Element)

[0322] In addition, L1 signaling may be signaling corresponding to at least one or a combination of one or more signaling methods using the following physical layer channels or signaling.

[0323] - PDCCH (Physical Downlink Control Channel)

[0324] - DCI (Downlink Control Information)

[0325] - UE-specific DCI

[0326] - Group common DCI

[0327] - Common DCI

[0328] - Scheduling DCI (e.g. DCI used for scheduling downlink or uplink data)

[0329] - Non-scheduled DCI (e.g. DCI not intended for scheduling downlink or uplink data)

[0330] - PUCCH (Physical Uplink Control Channel)

[0331] - UCI (Uplink Control Information)

[0332] In the present disclosure, determining the priority between A and B may be referred to in various ways, such as selecting a higher priority according to a predetermined priority rule and performing an action corresponding to it, or omitting or dropping an action for a lower priority.

[0333] The term slot used in the present disclosure below is a general term that may refer to a specific time unit corresponding to a TTI (Transmit Time Interval), and may specifically mean a slot used in a 5G NR system, or a slot or subframe used in a 4G LTE system.

[0334] In the following disclosure, the above examples are described through a number of embodiments, but they are not independent, and one or more embodiments may be applied simultaneously or in combination.

[0335] <First embodiment: Method for determining transmission interval of overlapping SRS resources in time resources>

[0336] The first embodiment describes a specific method for determining transmission occasions of overlapping SRSs within the same time resource. This embodiment can be operated in combination with other embodiments. For example, the first embodiment can be operated in combination with the second and / or third embodiments.

[0337] The terminal determines a transmission interval for an uplink signal (e.g., PUSCH or PUCCH or SRS or PRACH) and calculates transmission power for the determined transmission interval i. Thereafter, the terminal transmits the transmission interval i of the corresponding uplink signal according to the calculated transmission power.

[0338] The terminal determines the transmission interval of the uplink signal to be transmitted based on the following information of the uplink signal.

[0339] - Slot index within a frame with a system frame number, SFN (system frame number)

[0340] - First symbol, S

[0341] - Number of consecutive symbols, L

[0342] That is, if the slot index in which the uplink signal is transmitted is different, the first symbol S of the transmitted uplink signal is different, or the number of consecutive symbols L in which the uplink signal is transmitted is different, the terminal can determine them as different uplink transmission intervals. In addition, the terminal determines the transmission interval of the PUSCH transmission that is repeatedly transmitted according to repetition type B as one nominal repetition.

[0343] The terminal can determine the transmission interval for the uplink signal as above. If multiple uplink signals can be transmitted during the same L consecutive symbols in the same first symbol S within the same slot, i.e., if multiple uplink signals can be transmitted with full overlap in the same time resource, the terminal can determine the corresponding multiple uplink signals as the same transmission interval. If the terminal determines the corresponding multiple uplink signals as the same transmission interval i, the transmission power of the corresponding transmission interval i can be determined as P(i).

[0344] If SRS transmission is scheduled, the terminal can transmit SRS resource(s) configured in an SRS resource set. A scheduled SRS resource set can include one or more SRS resource(s), and the terminal can transmit the configured SRS resource(s) according to configured RRC parameters. If the terminal transmits SRS resources in an SRS resource set, the transmission power of the transmitted SRS resource can be determined based on the RRC parameters configured in the SRS resource set. For example, if the RRC parameters alpha and p0 and pathlossReferenceRS and srs-PowerControlAdjustmentStates for indicating transmission power in an SRS resource set are configured, the terminal calculates the transmission power of the SRS resource in the SRS resource set by referring to the configured alpha and p0 and pathlossReferenceRS and srs-PowerControlAdjustmentStates. Alternatively, if followUnifiedTCI-StateSRS in an SRS resource set is set to 'enable', the UE calculates the transmit power for transmitting SRS resources in the SRS resource set by referring to ul-powerContol and pathlossReferenceRS-Id indicated by the TCI state associated with the SRS resource set (TCI-State if supporting a joint TCI state, or TCI-UL-State if supporting a separate TCI state).If the terminal supports mTRP-based uplink transmission and two or more TCI states (joint TCI state or separate TCI state) are indicated, the terminal can select a TCI state to be applied to transmit an SRS resource within the SRS resource set based on the value (first or second) set in the RRC parameter applyIndicatedTCI-State within the SRS resource set. If first is set in applyIndicatedTCI-State, the terminal can refer to the first TCI state among the two TCI states indicated to transmit the SRS resource within the corresponding SRS resource set to determine the transmission power and transmit the SRS. If second is set in applyIndicatedTCI-State, the terminal can refer to the second TCI state among the two TCI states indicated to transmit the SRS resource within the corresponding SRS resource set to determine the transmission power and transmit the SRS.

[0345] Within an SRS resource set for a given purpose, multiple (two or more) SRS resources can be transmitted simultaneously in the same symbol, depending on the UE capability of the UE. Figure 13 illustrates examples of an SRS resource set composed of SRS resources that do not overlap in the time domain and an SRS resource set composed of SRS resources that can be transmitted with overlap in the time domain.

[0346] The first SRS resource set (1300) represents a case where four SRS resources (1301, 1302, 1303, 1304) that do not overlap in the time domain within the SRS resource set are set. At this time, since each SRS resource has a different first symbol S, they can be determined as different transmission intervals. That is, SRS resource #1 (1301) can be determined as transmission interval i, SRS resource #2 (1032) as transmission interval i+1, SRS resource #3 (1303) as transmission interval i+2, and SRS resource #4 (1304) as transmission interval i+3.

[0347] The second SRS resource set (1310) represents a case where multiple SRS resources (1311, 1312, 1313, 1314) are set to overlap in the time domain within one SRS resource set. At this time, the first SRS resource (1311) and the second SRS resource (1312) have the same first symbol S and the same number of consecutive symbols L, and the terminal may consider this and determine the two overlapping first SRS resources (1311) and second SRS resources (1312) as one transmission interval i, or consider that they are different SRS resources and determine them as different transmission intervals i and transmission intervals i+1. Similarly, since the third SRS resource (1313) and the fourth SRS resource (1314) have the same first symbol S and the same number of consecutive symbols L, the terminal can determine the two overlapping third SRS resources (1313) and fourth SRS resources (1314) as one transmission interval i+1 considering this, or can determine them as different transmission intervals i+2 and i+3 considering that they are different SRS resources. When the terminal defines transmission intervals for four SRS resources (1311, 1312, 1313, 1314) in the second SRS resource set (1310), the case where the overlapped SRS resources are determined as one transmission interval, and the first SRS resource (1311) and the second SRS resource (1312) are defined as transmission interval i, and the third SRS resource (1313) and the fourth SRS resource (1314) are defined as transmission interval i+1, is defined as 'Definition 1'.As another example, when defining transmission intervals for four SRS resources (1311, 1312, 1313, 1314) in the second SRS resource set (1310), considering that the overlapping SRS resources are different SRS resources even though they are transmitted with the same S and L, the case where the transmission interval of the first SRS resource (1311) is defined as transmission interval i, the transmission interval of the second SRS resource (1312) as transmission interval i+1, the transmission interval of the third SRS resource (1313) as transmission interval i+2, and the transmission interval of the fourth SRS resource (1314) as transmission interval i+3 is defined as 'Definition 2'.

[0348] If the terminal determines the transmission section according to 'Definition 1', the terminal determines the SRS transmission power for the transmission section i as described above. can be determined by the transmission power of the transmission section i. can be transmitted by dividing it into two overlapping SRS resources (e.g., 1311 and 1312). At this time, the transmission power can be equally divided into the overlapping multiple SRS resources. Or, the transmission power can be divided by considering the priority among the overlapping multiple SRS resources. For example, if the transmission power of transmission section i is equally divided and transmitted into the overlapping SRS resources, the terminal transmits the transmission power of each of the two overlapping SRS resources (1311 and 1312). can be decided by

[0349] On the other hand, if the terminal determines the transmission interval according to 'Definition 2', the terminal sets the SRS transmission power for transmission interval i and transmission interval i+1, respectively. and , and the SRS transmission power determined for each transmission interval i and transmission interval i+1 is determined because the two SRS resources (1311 and 1312) are included in the same SRS resource set (1310). and can be determined by the same value. Therefore, in a symbol where two SRS resources (1311 and 1312) overlap, the terminal can transmit a total of 1311 and 1312 in that symbol because the two transmission intervals overlap. Two SRS resources (1311 and 1312) can be transmitted with the transmission power of .

[0350] According to 'Definition 2', when a transmission section is determined and multiple transmission sections overlap in the same symbol, it can be seen that the total transmission power transmitted by the terminal in one symbol can be greater than the transmission power of a single transmission section. In this case, the sum of the total transmission power is the maximum transmission power P that the terminal can transmit in the corresponding symbol. CMAX,f,c In this case, if the sum of the transmission power for multiple transmission sections that are overlapped and transmitted exceeds the maximum transmission power that can be transmitted for the corresponding symbol of the terminal, the terminal can determine the transmission power of each transmission section according to a specific rule. For example, the terminal can equally divide the transmission power and transmit it to multiple overlapping transmission sections. As a specific example, the terminal may transmit the P to two SRS resources (1311 and 1312 or 1313 and 1314) that overlap the second SRS resource set (1310) of FIG. 13. CMAX,f,c SRS resources can be transmitted in each transmission section by applying a transmission power of / 2. At this time, the total transmission power of the corresponding symbol is P CMAX,f,cis determined. As another example, the terminal can divide the transmission power and transmit it according to the priority for multiple overlapping transmission sections. As a specific example, in the second SRS resource set (1310) of Fig. 13, the transmission power is preferentially distributed to the transmission section that transmits the SRS resource having the SRS resource ID having a low value (or high value) in the two overlapping SRS resources (1311 and 1312 or 1313 and 1314), and the maximum transmission power P CMAX,f,c Considering the remaining power (e.g., P CMAX,f,c - P SRS,1 , where P SRS,1 The transmission power for a transmission section that transmits an SRS resource whose Id of the SRS resource has a high value (or low value) can be determined as the transmission power (which means the allocated transmission power first).

[0351] An SRS resource set that can be scheduled, such as the second SRS resource set (1310) of FIG. 13, may be an SRS resource set whose usage is set to 'nonCodebook'. When a terminal reports its capability to a base station, it may report to the base station whether or not it can support a non-codebook-based PUSCH transmission method, the maximum number of SRS resources that can be supported in an SRS resource set whose usage is 'nonCodebook', and the number of SRS resources that can be simultaneously transmitted by overlapping the same symbol among the SRS resources included in the SRS resource set whose usage is 'nonCodebook'.

[0352] The third SRS resource set (1320) and the fourth SRS resource set (1330) of FIG. 13 may be scheduled to be transmitted overlapping at the same time. It is assumed that the third SRS resource set (1320) includes four SRS resources (1321, 1322, 1323, 1324), and that these four SRS resources (1321, 1322, 1323, 1324) overlap with the four SRS resources (1331, 1332, 1333, 1334) included in the fourth SRS resource (1330) in the same time resource. That is, the first SRS resource (1321) of the third SRS resource set (1320) may have the same first symbol S and the same number of consecutive symbols L as the first SRS resource (1331) of the fourth SRS resource set (1330). Likewise, the second to fourth SRS resources (1322, 1323, 1324) within the third SRS resource set (1320) may also have the same first symbol S and the same number of consecutive symbols L as the second to fourth SRS resources (1332, 1333, 1334) within the fourth SRS resource set (1330) in the same time resource. In this case, the transmission intervals for the SRS resources (1321 to 1324 and 1331 to 1334) within the overlapping SRS resource sets (1320 and 1330) may be determined by considering 'Definition 1' or 'Definition 2'.

[0353] If multiple SRS resources included in different SRS resource sets that are overlapped and transmitted according to 'Definition 1' are defined as the same transmission section, ambiguity may occur when the terminal determines the transmission power for the corresponding transmission section. For example, if the transmission power parameter applied to the third SRS resource set (1320) in FIG. 13 and the transmission power parameter applied to the fourth SRS resource set (1330) are different, and the first SRS resource (1321) included in the third SRS resource set (1320) and the first SRS resource (1331) included in the fourth SRS resource set (1330) are defined as one transmission section i, the terminal may determine the transmission power for the transmission section i due to the different transmission power parameters applied to the two different SRS resource sets (1320 and 1330). may not be able to calculate. That is, the terminal Separate rules may be required to determine the transmit power parameters to be applied in calculating .

[0354] As a separate rule that can be considered first, when SRS resources within different SRS resource sets overlap, such as the third SRS resource set (1320) and the fourth SRS resource set (1330) in FIG. 13, and the SRS transmission interval is determined as in 'Definition 1', a higher layer parameter must be set so that the same transmission power parameter can be applied to the two overlapping SRS resource sets. Here, as the higher layer parameters that must be set identically so that the UE can apply the same transmission power parameter to the two overlapping SRS resource sets, alpha, p0, pathlossReferenceRS and / or srs-PowerControlAdjustmentStates set in the SRS resource set can be considered for determining the SRS transmission power. Alternatively, if followUnifiedTCI-StateSRS in the SRS resource set is set to 'enable', the upper layer parameters that must be set identically so that the UE can apply the same transmit power parameter to two overlapping SRS resource sets may be considered as ul-powerContol and pathlossReferenceRS-Id indicated by the TCI state (TCI-State if joint TCI state is supported, or TCI-UL-State if separate TCI state is supported) associated with the SRS resource set.

[0355] Secondly, as a separate rule that can be considered, when SRS resources within different SRS resource sets overlap, such as the third SRS resource set (1320) and the fourth SRS resource set (1330) of FIG. 13, and the SRS transmission section is determined as in 'Definition 1', the transmission power of the transmission section can be determined according to either SRS resource set of the two overlapping SRS resource sets. As a specific example, the transmission power of the transmission section determined as in 'Definition 1' can be determined according to the transmission power parameter set in the SRS resource set with the smaller SRS-ResourceSetId of the two overlapping SRS resource sets (1320 and 1330). Alternatively, the transmission power of the transmission section determined as in 'Definition 1' can be determined according to the transmission power parameter set in the SRS resource set with the larger SRS-ResourceSetId of the two overlapping SRS resource sets (1320 and 1330). Alternatively, if the SRS resources included in the two SRS resource sets (1320 and 1330) do not fully overlap, the transmission power for the transmission interval may be determined based on the transmission power parameter set in the SRS resource set that is transmitted first. Alternatively, the transmission power for the transmission interval may be determined based on the transmission power parameter set in the SRS resource set that finishes transmitting the SRS resources in the SRS resource set latest.

[0356] If multiple SRS resources included in different SRS resource sets that are transmitted in an overlapping manner according to 'Definition 2' are defined as different transmission intervals, the terminal can determine the transmission power for each transmission interval according to the transmission power parameter applied to each SRS resource set. For example, if the transmission power parameter applied to the third SRS resource set (1320) of FIG. 13 is different from the transmission power parameter applied to the fourth SRS resource set (1330), and the first SRS resource (1321) included in the third SRS resource set (1320) and the first SRS resource (1331) included in the fourth SRS resource set (1330) are defined as transmission interval i and transmission interval i+1, respectively, the terminal determines the transmission power of the SRS resource (1321) transmitted in transmission interval i according to the transmission power parameter applied to the third SRS resource set (1320), and determines the transmission power of the SRS resource (1331) transmitted in transmission interval i+1 according to the transmission power parameter applied to the fourth SRS resource set (1330).

[0357] The SRS resource sets that can be scheduled, such as the third SRS resource set (1320) and the fourth SRS resource set (130) in FIG. 13, may be two different SRS resource sets whose usage is set to 'beamManagement' and whose time domain behavior is set to the same (periodic or semi-persistent or aperiodic). Even if the usage is set to the same 'beamManagement', different SRS resources within the same SRS resource set cannot be transmitted at the same given time instant, so only one SRS resource can be transmitted. However, SRS resources included in different SRS resource sets can be transmitted simultaneously, as in the examples of the SRS resource set (1320) and the fourth SRS resource set (1330) in FIG. 13.

[0358] As can be seen in the examples in Figure 13, when multiple SRS resources are scheduled for simultaneous transmission in the same time symbol, ambiguity may arise in determining the transmission interval. To eliminate this ambiguity, the following additional considerations may be taken into account when determining the transmission interval for SRS transmission.

[0359] [Method 1 for determining SRS transmission interval] In addition to the method for determining the uplink transmission interval, the SRS transmission interval can be defined for each SRS resource. If multiple SRS resources are transmitted simultaneously, the SRS transmission interval i is the slot index within the SFN. And it is defined according to the first symbol S and the number of consecutive symbols L and the SRS resource. That is, different SRS resources can be determined by different transmission intervals. For the second SRS resource set (1310) and the overlapping third SRS resource set (1320) and the fourth SRS resource set (1330) in Fig. 13, the transmission intervals for transmitting all the overlapping SRS resources can be determined differently. For example, the overlapping first SRS resource (1311) and the second SRS resource (1312) of the second SRS resource set (1310) can be determined by different transmission intervals i and i+1. Similarly, the overlapping third SRS resource (1313) and the fourth SRS resource (1314) of the second SRS resource set (1310) can be determined by different transmission intervals i+2 and i+3. Similarly, for the overlapping third SRS resource set (1320) and fourth SRS resource set (1330), the first SRS resource (1321) of the third SRS resource set (1320) and the first SRS resource (1331) of the fourth SRS resource set (1330) can be determined with different transmission intervals i and i+1.Similarly, the second to fourth SRS resources (1322, 1323, 1324) of the third SRS resource set (1320) can be determined as transmission interval i+2, transmission interval i+4, and transmission interval i+6, respectively, and the second to fourth SRS resources (1332, 1333, 1334) of the fourth SRS resource set (1330) can be determined as transmission interval i+3, transmission interval i+5, and transmission interval i+7, respectively. When the terminal determines the SRS transmission interval according to the SRS transmission interval determination method 1, the sum of the transmission powers for multiple transmission intervals transmitted in the same symbol is the maximum transmission power P that the terminal can transmit in the corresponding symbol. CMAX,f,c may exceed. If the sum of the transmission power for multiple transmission sections that are overlapped and transmitted exceeds the maximum transmission power that can be transmitted in the corresponding symbol of the terminal, the terminal may determine the transmission power of each transmission section according to a specific rule. For example, the terminal may equally divide the transmission power and transmit it to multiple overlapping transmission sections. In another example, the terminal may divide the transmission power and transmit it to multiple overlapping transmission sections according to priority.

[0360] [Method 2 for determining SRS transmission interval] In addition to the method for determining the uplink transmission interval, the SRS transmission interval can be defined for each SRS resource set. If multiple SRS resources are transmitted simultaneously, the SRS transmission interval i is the slot index within the SFN. And it is defined according to the first symbol S and the number of consecutive symbols L and the SRS resource set. That is, SRS resources included in different SRS resource sets can be determined as different transmission intervals. The first SRS resource (1311) and the second SRS resource (1312) that are transmitted overlapping the same symbol included in the second SRS resource set (1310) in Fig. 13 can be determined as the same transmission interval i. The terminal can set the SRS transmission power for the corresponding transmission interval i as described above. can be determined by the transmission power of the transmission section i. can be transmitted by dividing them into two overlapping SRS resources (e.g., 1311 and 1312). On the other hand, the first SRS resources (1321 and 1331) that are transmitted by overlapping the same symbol included in the third SRS resource set (1320) and the fourth SRS resource set (1330) in Fig. 13 can be determined as different transmission intervals i and i+1. The terminal can set the SRS transmission power for transmission interval i and transmission interval i+1, respectively. and , and the terminal transmits the transmission power of the SRS resource (1321) transmitted in the transmission section i. The transmission power of the SRS resource (1331) transmitted in transmission section i+1 is determined according to the transmission power parameter applied to the third SRS resource set (1320). is determined according to the transmission power parameter applied to the fourth SRS resource set (1330). The transmission interval and transmission power according to the transmission interval can also be determined for other overlapping SRS resources (1322 to 1324 and 1332 to 1334). When the terminal determines the SRS transmission interval according to the SRS transmission interval determination method 2, the sum of the transmission powers for multiple transmission intervals transmitted in the same symbol is the maximum transmission power P that the terminal can transmit in the corresponding symbol. CMAX,f,c may exceed. If the sum of the transmission power for multiple transmission sections that are overlapped and transmitted exceeds the maximum transmission power that the terminal can transmit for the corresponding symbol, the terminal may determine the transmission power for each transmission section according to a specific rule. For example, the terminal may equally divide the transmission power for multiple overlapping transmission sections and transmit it. In another example, the terminal may divide the transmission power for multiple overlapping transmission sections and transmit it according to priority.

[0361] [Method 3 for determining SRS transmission interval] In addition to the method for determining uplink transmission intervals, an SRS transmission interval for the 'non-Codebook' usage can be defined for each SRS resource. If multiple SRS resources within an SRS resource set with the usage set to 'non-Codebook' are transmitted simultaneously, the SRS transmission interval i is the slot index within the SFN. And it is defined according to the first symbol S and the number of consecutive symbols L and the SRS resource. For the second SRS resource set (1310) in Fig. 13, the transmission intervals for transmitting all the overlapped SRS resources can be determined differently. For example, the overlapped first SRS resource (1311) and the second SRS resource (1312) of the second SRS resource set (1310) can be determined as different transmission intervals i and i+1. Similarly, the overlapped third SRS resource (1313) and the fourth SRS resource (1314) of the second SRS resource set (1310) can be determined as different transmission intervals i+2 and i+3. When the terminal determines the SRS transmission interval according to the SRS transmission interval determination method 3, the sum of the transmission powers for multiple transmission intervals transmitted in the same symbol is the maximum transmission power P that the terminal can transmit in the corresponding symbol. CMAX,f,c may exceed. If the sum of the transmission power for multiple transmission sections that are overlapped and transmitted exceeds the maximum transmission power that the terminal can transmit for the corresponding symbol, the terminal may determine the transmission power for each transmission section according to a specific rule. For example, the terminal may equally divide the transmission power for multiple overlapping transmission sections and transmit it. In another example, the terminal may divide the transmission power for multiple overlapping transmission sections and transmit it according to priority.

[0362] [Method 4 for determining SRS transmission interval] In addition to the method for determining uplink transmission intervals, an SRS transmission interval for 'non-Codebook' usage can be defined for each SRS resource set. If multiple SRS resources within an SRS resource set with usage set to 'non-Codebook' are transmitted simultaneously, the SRS transmission interval i is the slot index within the SFN. And it is defined according to the first symbol S and the number of consecutive symbols L and the SRS resource set. For the second SRS resource set (1310) in Fig. 13, the transmission interval for transmitting all overlapping SRS resources can be determined identically. The first SRS resource (1311) and the second SRS resource (1312) that are transmitted overlapping the same symbol included in the second SRS resource set (1310) in Fig. 13 can be determined as the same transmission interval i. The terminal can set the SRS transmission power as described above for the corresponding transmission interval i. can be determined by the transmission power of the transmission section i. It can be transmitted by dividing it into two overlapping SRS resources (e.g., 1311 and 1312).

[0363] [Method 5 for determining SRS transmission interval] In addition to the method for determining the uplink transmission interval, an SRS transmission interval for the purpose of 'beamManagement' can be defined for each SRS resource. If multiple SRS resources within an SRS resource set with the usage set to 'beamManagement' are transmitted simultaneously, the SRS transmission interval i is the slot index within the SFN. And it is defined according to the first symbol S and the number of consecutive symbols L and the SRS resource. For the third SRS resource set (1320) and the fourth SRS resource set (1330) overlapped in Fig. 13, the transmission intervals for transmitting all overlapped SRS resources can be determined differently. For the third SRS resource set (1320) and the fourth SRS resource set (1330) overlapped, the first SRS resource (1321) of the third SRS resource set (1320) and the first SRS resource (1331) of the fourth SRS resource set (1330) can be determined as different transmission intervals i and i+1. Similarly, the second to fourth SRS resources (1322, 1323, 1324) of the third SRS resource set (1320) can be determined as transmission interval i+2, transmission interval i+4, and transmission interval i+6, respectively, and the second to fourth SRS resources (1332, 1333, 1334) of the fourth SRS resource set (1330) can be determined as transmission interval i+3, transmission interval i+5, and transmission interval i+7, respectively. When the terminal determines the SRS transmission interval according to the SRS transmission interval determination method 5, the sum of the transmission powers for multiple transmission intervals transmitted in the same symbol is the maximum transmission power P that the terminal can transmit in the corresponding symbol. CMAX,f,cmay exceed. If the sum of the transmission power for multiple transmission sections that are overlapped and transmitted exceeds the maximum transmission power that the terminal can transmit for the corresponding symbol, the terminal may determine the transmission power for each transmission section according to a specific rule. For example, the terminal may equally divide the transmission power for multiple overlapping transmission sections and transmit it. In another example, the terminal may divide the transmission power for multiple overlapping transmission sections and transmit it according to priority.

[0364] [SRS Transmission Interval Determination Method 6] In addition to the uplink transmission interval determination method, an SRS transmission interval for the 'beamManagement' purpose can be defined for each SRS resource set. If multiple SRS resources within an SRS resource set whose usage is set to 'beamManagement' are transmitted simultaneously, the SRS transmission interval i is the slot index within the SFN. And it is defined according to the first symbol S and the number of consecutive symbols L and the SRS resource set. The first SRS resources (1321 and 1331) that are overlapped and transmitted in the same symbol included in the third SRS resource set (1320) and the fourth SRS resource set (1330) in Fig. 13 can be determined as different transmission intervals i and i+1. The terminal can set the SRS transmission power for each transmission interval i and each transmission interval i+1. and , and the terminal transmits the transmission power of the SRS resource (1321) transmitted in the transmission section i. The transmission power of the SRS resource (1331) transmitted in transmission section i+1 is determined according to the transmission power parameter applied to the third SRS resource set (1320). is determined according to the transmission power parameter applied to the fourth SRS resource set (1330). The transmission interval and transmission power according to the transmission interval can also be determined for other overlapping SRS resources (1322 to 1324 and 1332 to 1334). When the terminal determines the SRS transmission interval according to the SRS transmission interval determination method 6, the sum of the transmission powers for multiple transmission intervals transmitted in the same symbol is the maximum transmission power P that the terminal can transmit in the corresponding symbol. CMAX,f,c may exceed. If the sum of the transmission power for multiple transmission sections that are overlapped and transmitted exceeds the maximum transmission power that the terminal can transmit for the corresponding symbol, the terminal may determine the transmission power for each transmission section according to a specific rule. For example, the terminal may equally divide the transmission power for multiple overlapping transmission sections and transmit it. In another example, the terminal may divide the transmission power for multiple overlapping transmission sections and transmit it according to priority.

[0365] The SRS resource set configuration composed of SRS resources overlapping in the time domain described with reference to FIG. 13 is only an example for explanation and does not limit the scope of the present invention, and the above-described [SRS transmission interval determination method 1] to [SRS transmission interval determination method 6] can be applied to SRS resource sets composed of SRS resources overlapping in the time domain that are set in a different way from FIG. 13. For example, FIG. 13 describes an example in which two of the four SRS resources in the second SRS resource set (1310) overlap each other, but [SRS transmission interval determination method 1] to [SRS transmission interval determination method 6] can also be applied to a case in which all four SRS resources overlap in the time domain. In addition, in FIG. 13, the case where all four SRS resources (1321, 1322, 1323, 1324) in the third SRS resource set (1320) and the four SRS resources (1331, 1332, 1333, 1334) in the fourth SRS resource set (1330) overlap is described as an example, but [SRS transmission interval determination method 1] to [SRS transmission interval determination method 6] can also be applied to the case where only some SRS resources in two SRS resource sets overlap in the time domain.

[0366] <Second embodiment: Method for determining the transmission interval of PUSCH transmitted simultaneously to multiple panels>

[0367] The second embodiment specifically describes a method for determining the transmission interval of a PUSCH transmitted simultaneously via multiple panels when a terminal can support a multi-panel-based simultaneous uplink transmission technique. This embodiment can operate in combination with other embodiments. For example, the second embodiment can operate in combination with the first and / or third embodiments.

[0368] Depending on the terminal's capabilities, the terminal can transmit uplink signals to multiple TRPs (transmission and reception points) using multiple panels.

[0369] Simultaneous transmission with multi-panel (STxMP) based on multiple panels can be defined as different transmission methods according to the type of DCI that schedules PUSCH and the uplink signal transmitted to each panel, as shown in FIG. 14.

[0370] Figure 14 shows an example of STxMP transmission techniques.

[0371] The first method (1400) and the second method (1410) of FIG. 14 represent a single-DCI-based STxMP scheme. That is, the first method (1400) and the second method (1410) schedule PUSCHs (1401 and 1402 or 1411 and 1412) transmitted to two panels with one DCI (1403 or 1413). The third method (1420) represents a multi-DCI-based STxMP scheme. That is, the third method (1420) schedules PUSCHs (1421 and 1422) that overlap two DCIs (1423 and 1424) in the same time resource.

[0372] The first method (1400) of Fig. 14 is a spatial division multiplexing (SDM)-based STxMP technique, in which the terminal divides the layers of a PUSCH scheduled for a single DCI (1403) and transmits them on two different panels (1401 and 1402). To support the single DCI-based SDM STxMP technique, the upper layer parameter multipanelScheme is set to sdm, and two SRS resource sets with a purpose of 'codebook' or 'non-codebook' are configured. And the base station can activate two TCI states (TCI-State if joint TCI state is supported, or TCI-UL-State if separate TCI state is supported) with MAC CE and indicate with DCI to indicate the transmission power and uplink beam (if supported) of the uplink signal transmitted to each panel, and the terminal can transmit the uplink signal by applying the two indicated TCI states after a specific time (BAT, beam application time) from the time of transmitting an ACK for the corresponding DCI (DCI indicating the TCI state) to the base station. At this time, different DMRS ports are indicated for the DMRS transmitted to each panel (1405), and the PUSCHs (1401 and 1402) transmitted for each panel are precoded with different uplink precoders and transmitted with different transmission powers.At this time, if the base station indicates two TCI states (TCI-State if it supports joint TCI state, or TCI-UL-State if it supports separate TCI state), the terminal determines the transmission power by referring to ul-powerContol and pathlossReferenceRS-Id indicated by the first TCI state for the PUSCH (1401) transmitted in the first panel associated with the first SRS resource set and transmitted, and determines the transmission power by referring to ul-powerContol and pathlossReferenceRS-Id indicated by the second TCI state for the PUSCH (1402) transmitted in the second panel associated with the second SRS resource set and transmitted.

[0373] The second method (1410) of Fig. 14 is a single frequency network (SFN)-based STxMP technique, in which the UE repeatedly transmits the same layer of a PUSCH scheduled with a single DCI (1413) on two different panels (1411 and 1412). To support the single DCI-based SFN STxMP technique, the upper layer parameter multipanelScheme is set to sfn, and two SRS resource sets with a purpose of 'codebook' or 'nonCodebook' are configured. And the base station can activate two TCI states (TCI-State if joint TCI state is supported, or TCI-UL-State if separate TCI state is supported) with MAC CE and indicate with DCI to indicate the transmission power and uplink beam (if supported) of the uplink signal transmitted to each panel, and the terminal can transmit the uplink signal by applying the two indicated TCI states after a specific time (BAT, beam application time) from the time of transmitting an ACK for the corresponding DCI (DCI indicating the TCI state) to the base station. At this time, the DMRS transmitted to each panel is indicated by the same DMRS port (1415), but the PUSCHs (1411 and 1412) transmitted by each panel can be precoded with different uplink precoders and transmitted with different transmission powers.Similar to the single DCI-based SDM technique, if the base station indicates two TCI states (TCI-State if it supports joint TCI state, or TCI-UL-State if it supports separate TCI states), the UE determines the transmission power by referring to ul-powerContol and pathlossReferenceRS-Id indicated by the first TCI state for the PUSCH (1411) transmitted in the first panel associated with the first SRS resource set and transmitted, and determines the transmission power by referring to ul-powerContol and pathlossReferenceRS-Id indicated by the second TCI state for the PUSCH (1412) transmitted in the second panel associated with the second SRS resource set and transmitted.

[0374] The third method (1420) of FIG. 14 is a multi-DCI (1423 and 1424)-based STxMP technique, in which a PUSCH (1421) is scheduled to transmit a DCI (1423) associated with a CORESET having a coresetPoolIndex value of 0 to the first panel, and a PUSCH (1422) is scheduled to transmit a DCI (1424) associated with a CORSET having a coresetPoolIndex value of 1 to the second panel. The two scheduled PUSCHs (1421 and 1422) can transmit different transport blocks (TBs) (or can be scheduled to transmit the same TB based on retransmission). To support the multi-CSI-based STxMP technique, the upper layer parameter sTx-2Panel is set to enable, and two SRS resource sets with a purpose of 'codebook' or 'nonCodebook' are configured. The first SRS resource set (the SRS resource set with the SRS resource set Id set to a lower value) may be associated with a CORESET with a coresetPoolIndex value of 0 and may be associated with a scheduled PUSCH, and the second SRS resource set (the SRS resource set with the SRS resource set Id set to a higher value) may be associated with a CORESET with a coresetPoolIndex value of 1 and may be associated with a scheduled PUSCH.And the base station can indicate the transmission power of the uplink signal transmitted to each panel and the uplink beam (if supported) through the TCI state (TCI-State if the joint TCI state is supported, or TCI-UL-State if the separate TCI state is supported) indicated by the DCI (wherein the DCI indicating the TCI state is DCI format 1_1 or 1_2 for scheduling the PDSCH) associated with the corresponding coresetPoolIndex value, and the terminal can transmit the uplink signal by applying the two indicated TCI states after a specific time (BAT, beam application time) from the time of transmitting an ACK for the corresponding DCI (DCI indicating the TCI state) to the base station. Two different PUSCHs (1421 and 1422) can be scheduled to be transmitted on different DMRS ports (1425 and 1426) indicated through DCIs (1423 and 1424), with different precoders indicated through DCIs (1423 and 1424) and with different transmit powers based on the previously indicated TCI state (wherein the TCI state is indicated by DCI format 1_1 or 1_2 as described above). Each DCI (1423 and 1424) can schedule the PUSCHs (1421 and 1422) on the same or different time / frequency resources. That is, the overlapping PUSCHs (1421 and 1422) scheduled to each DCI (1423 and 1424) may be fully overlapping or partially overlapping in time resources, and may be fully overlapping, partially overlapping, or non-overlapping in frequency resources.

[0375] As can be seen in Fig. 14, the two STxMP techniques (1400 and 1410) based on a single DCI can be seen that the time and frequency resources of the PUSCH transmitted to the two panels fully overlap because they are scheduled through a single DCI, and the two PUSCHs scheduled through multiple DCIs can also fully overlap in time and frequency according to the scheduling information of each DCI. If the time resources of the PUSCHs transmitted to the two panels fully overlap in this way, the terminal determines the transmission section of the uplink channel according to the method discussed above (the slot index within the frame having the system frame number, SFN). And the first symbol S and the number of consecutive symbols L) can be determined as one transmission interval. However, as explained above, the multi-panel simultaneous transmission technique must transmit the PUSCH with different transmission power and different uplink beams (if supported) in order to transmit to each TRP through each panel. To solve this problem, a new transmission interval determination method can be defined so that PUSCHs transmitted to different panels can be determined as different transmission intervals, or if the STxMP technique is supported, a method can be defined that can calculate different transmission powers for the same transmission interval.

[0376] [STxMP PUSCH transmission interval determination method]

[0377] If a single DCI or multi-DCI based STxMP PUSCH transmission is scheduled, the PUSCH transmission interval can be defined for each SRS resource set along with the method for determining the uplink transmission interval. If a PUSCH transmission (a PUSCH transmission) is associated with a multipanelScheme or sTx-2Panel, the PUSCH transmission interval can be defined for each SRS resource set along with the method for determining the uplink transmission interval.

[0378] If multipanelScheme is configured for PUSCH transmission and two SRS resource sets with usage of 'codebook' or 'nonCodebook' are configured, and the SRS resource set indicator is set to '10' in the DCI (or activation DCI or configured grant-based RRC configuration) that schedules PUSCH, then PUSCH transmission interval i and PUSCH transmission interval i+1 are slot indices within the SFN. And it is defined according to the first symbol S and the number of consecutive symbols L and two associated SRS resource sets. PUSCH transmission interval i is associated with the first (or second) SRS resource set and PUSCH transmission interval i+1 is associated with the second (or first) SRS resource set. The first and second SRS resource sets are SRS resource sets having lower or higher srs-ResourceSetId for the two SRS resource sets whose usage is codebook or nonCodebook set in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2, respectively.

[0379] If sTx-2Panel is configured for PUSCH transmission and two SRS resource sets with usage of 'codebook' or 'nonCodebook' are configured, and two PUSCHs scheduled with DCI formats in PDCCHs received from CORESETs associated with different coresetPoolIndexes completely overlap in the time domain, then PUSCH transmission interval i and PUSCH transmission interval i+1 are slot indices in the SFN. And it is defined according to the first symbol S and the number of consecutive symbols L and two associated SRS resource sets. PUSCH transmission interval i is associated with the first (or second) SRS resource set and PUSCH transmission interval i+1 is associated with the second (or first) SRS resource set. The first and second SRS resource sets are SRS resource sets having lower or higher srs-ResourceSetId for the two SRS resource sets whose usage is codebook or nonCodebook set in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2, respectively.

[0380] Or, if sTx-2Panel is configured for PUSCH transmission and two SRS resource sets with usage of 'codebook' or 'nonCodebook' are configured, and two PUSCHs scheduled with DCI formats in PDCCHs received from CORESETs associated with different coresetPoolIndexes completely overlap in the time domain, then PUSCH transmission interval i and PUSCH transmission interval i+1 are slot indices in the SFN. And it is defined according to the first symbol S and the number of consecutive symbols L and the associated coresetPoolIndex. PUSCH transmission interval i is defined in association with the DCI in the PDCCH received by the CORESET whose coresetPoolIndex value is 0 (or 1), and PUSCH transmission interval i+1 is defined in association with the DCI in the PDCCH received by the CORESET whose coresetPoolIndex value is 1 (or 0).

[0381] Or, if multipanelScheme is configured for PUSCH transmission and two SRS resource sets with usage of 'codebook' or 'nonCodebook' are configured, and the SRS resource set indicator is indicated as '10' in the DCI (or activation DCI or configured grant-based RRC configuration) scheduling the PUSCH, then the PUSCH transmission interval i is the slot index within the SFN. And the first symbol S and the number of consecutive symbols L and the first (or second) SRS resource set are defined, and the PUSCH transmission interval i+1 is the slot index within the SFN. And it is defined according to the first symbol S and the number of consecutive symbols L and the second (or first) SRS resource set. The first and second SRS resource sets are the SRS resource sets with lower or higher srs-ResourceSetId for the two SRS resource sets whose usage is set to codebook or nonCodebook in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2, respectively.

[0382] If sTx-2Panel is configured for PUSCH transmission and two SRS resource sets with usage of 'codebook' or 'nonCodebook' are configured, and two PUSCHs scheduled with DCI formats in PDCCHs received from CORESETs associated with different coresetPoolIndexes completely overlap in the time domain, then the PUSCH transmission interval i is the slot index in the SFN. And the first symbol S and the number of consecutive symbols L and the first (or second) SRS resource set are defined, and the PUSCH transmission interval i+1 is the slot index within the SFN. And it is defined according to the first symbol S and the number of consecutive symbols L and the second (or first) SRS resource set. The first and second SRS resource sets are the SRS resource sets with lower or higher srs-ResourceSetId for the two SRS resource sets whose usage is set to codebook or nonCodebook in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2, respectively.

[0383] Or, if sTx-2Panel is configured for PUSCH transmission and two SRS resource sets with usage of 'codebook' or 'nonCodebook' are configured, and two PUSCHs scheduled with DCI formats in PDCCHs received from CORESETs associated with different coresetPoolIndexes completely overlap in the time domain, then the PUSCH transmission interval i is the slot index in the SFN. And the first symbol S and the number of consecutive symbols L and the coresetPoolIndex value is 0 (or 1), and the DCI in the PDCCH is defined as being associated with the CORESET, and the PUSCH transmission interval i+1 is the slot index in the SFN. And it is defined in association with the DCI in the PDCCH received as the first symbol S and the number of consecutive symbols L and the CORESET whose coresetPoolIndex value is 1 (or 0).

[0384] Alternatively, if a single DCI or multi-DCI based STxMP PUSCH transmission is scheduled, the PUSCH transmission interval can be defined according to the applicable TCI state along with the uplink transmission interval determination method. If a PUSCH transmission is associated with a multipanelScheme or sTx-2Panel, the PUSCH transmission interval can be defined according to the applicable TCI state along with the uplink transmission interval determination method.

[0385] In this way, the terminal determines multiple overlapping transmission sections i and transmission section i+1 for the STxMP PUSCH transmitted for each panel, and determines the transmission power according to the transmission section with reference to ul-powerContol and pathlossReferenceRS-Id indicated by the TCI state associated with each STxMP PUSCH. As a specific example, the terminal determines the transmission power of the transmission section i determined for the STxMP PUSCH according to the above-described method with reference to ul-powerContol and pathlossReferenceRS-Id indicated by the first (or second) indicated TCI state, and determines the transmission power of the transmission section i+1 determined for the STxMP PUSCH with reference to ul-powerContol and pathlossReferenceRS-Id indicated by the second (or first) indicated TCI state.

[0386] [How to determine two transmission powers for one STxMP PUSCH transmission period]

[0387] Unlike the above-mentioned case where multiple transmission intervals are determined for STxMP PUSCH transmission, i and i+1, a single transmission interval i can be determined and the PUSCH transmitted to each panel can be defined to be transmitted with different transmission power. That is, when a single DCI-based STxMP technique and a multiple DCI-based STxMP technique that completely overlap in time resources are scheduled, the terminal determines the transmission interval of the uplink channel by (a slot index within a frame having a system frame number, SFN) And the first symbol S and the number of consecutive symbols L) are determined as one transmission interval i, and each PUSCH can be transmitted by calculating the transmission power associated with each SRS resource set for one transmission interval i for STxMP PUSCH transmission.

[0388] The terminal determines the transmission interval i for the STxMP PUSCH according to a method for determining the transmission interval of an uplink channel, and if the terminal identifies that the PUSCH is simultaneously transmitted based on two SRS resource sets according to the STxMP technique (higher layer parameters (multipanelScheme or sTx-2Panel) and a specific field in scheduling DCI (SRS resource set indicator)), the terminal determines the transmission power with reference to ul-powerContol and pathlossReferenceRS-Id indicated by the first indicated TCI state for the PUSCH transmitted based on the first SRS resource set, and determines the transmission power with reference to ul-powerContol and pathlossReferenceRS-Id indicated by the second indicated TCI state for the PUSCH transmitted based on the second SRS resource set.

[0389] <Third embodiment: Method for determining the transmission interval of PUCCH transmitted simultaneously to multiple panels>

[0390] The third embodiment specifically describes a method for determining the transmission interval of a PUCCH transmitted simultaneously via multiple panels, if the terminal supports a multi-panel-based simultaneous uplink transmission technique. This embodiment can operate in combination with other embodiments. For example, the third embodiment can operate in combination with the first and / or second embodiments.

[0391] Similar to the SFN-based STxMP technique (1410) of FIG. 14 described above, a single DCI-based SFN PUCCH transmission technique can be supported. In order to support the single DCI-based SFN PUCCH technique, the upper layer parameter multipanelSFN-Scheme in the PUCCH source configuration must be set to enable, and the upper layer parameter applyIndicatedTCI-State for indicating the applicable TCI state must be set to both. In addition, the base station can activate two TCI states (TCI-State if supporting a joint TCI state, or TCI-UL-State if supporting a separate TCI state) with MAC CE and indicate them with DCI to indicate the transmit power of the uplink signal transmitted to each panel and the uplink beam (if supported), and the terminal can transmit the uplink signal by applying the two indicated TCI states after a specific time (BAT, beam application time) from the time of transmitting an ACK for the corresponding DCI (DCI indicating the TCI state) to the base station. If the base station indicates two TCI states (TCI-State if it supports joint TCI state, or TCI-UL-State if it supports separate TCI state), the terminal determines the transmission power by referring to ul-powerContol and pathlossReferenceRS-Id indicated by the first TCI state for PUCCH transmitted to the first panel, and determines the transmission power by referring to ul-powerContol and pathlossReferenceRS-Id indicated by the second TCI state for PUCCH transmitted to the second panel.

[0392] As with PUSCH, if the time resources of PUCCH transmitted in two panels completely overlap, the terminal determines the transmission interval of the uplink channel according to the method discussed above (slot index within the frame having the system frame number, SFN). And the first symbol S and the number of consecutive symbols L) can be determined as one transmission interval. However, as explained above, the multi-panel simultaneous transmission technique requires transmitting PUCCH with different transmission power and different uplink beams (if supported) to transmit to each TRP through each panel. Similar to PUSCH, to solve this problem, a new transmission interval determination method can be defined so that PUSCH transmitted to different panels can be determined as different transmission intervals, or if the STxMP technique is supported, a method can be defined to calculate different transmission powers for the same transmission interval.

[0393] [STxMP PUCCH Transmission Interval Determination Method]

[0394] If a single DCI-based SFN PUCCH transmission is scheduled, the PUCCH transmission interval can be defined for each TCI state along with the method of determining the uplink transmission interval.

[0395] If multipanelSFN-Scheme is set for PUCCH transmission and applyIndicatedTCI-State is set to both, PUCCH transmission interval i and PUCCH transmission interval i+1 are slot indices within the SFN. And it is defined according to the first symbol S and the number of consecutive symbols L and two TCI states. PUCCH transmission period i is associated with the first TCI state and PUCCH transmission period i+1 is associated with the second TCI state. The first and second TCI states may correspond to the first and second TCI states among the two TCI states that are applied after a specific time (BAT, beam application time) from the time when the terminal transmits an ACK for the corresponding DCI to the base station after receiving it in DCI format 1_1 or 1_2, respectively.

[0396] The terminal determines multiple overlapping transmission sections i and transmission section i+1 for the SFN PUCCH transmitted for each panel, and determines the transmission power according to the transmission section with reference to ul-powerContol and pathlossReferenceRS-Id indicated by the TCI state associated with each SFN PUCCH. As a specific example, the terminal determines the transmission power of the transmission section i determined for the SFN PUCCH according to the above-described method with reference to ul-powerContol and pathlossReferenceRS-Id indicated by the first (or second) indicated TCI state, and determines the transmission power of the transmission section i+1 determined for the SFN PUCCH with reference to ul-powerContol and pathlossReferenceRS-Id indicated by the second (or first) indicated TCI state.

[0397] [Method for determining two transmission powers for one STxMP PUCCH transmission period]

[0398] Unlike the above-mentioned case where multiple transmission intervals are determined for SFN PUCCH transmission, i and i+1, a single transmission interval i can be determined and the PUCCH transmitted to each panel can be defined to be transmitted with different transmission power. That is, when a single DCI-based STxMP technique and a multiple DCI-based STxMP technique that completely overlap in time resources are scheduled, the terminal determines the transmission interval of the uplink channel by (a slot index within a frame having a system frame number, SFN (system frame number)) And the first symbol S and the number of consecutive symbols L) are determined as one transmission interval i, and each PUCCH can be transmitted by calculating the transmission power associated with each TCI state for one transmission interval i for SFN PUCCH transmission.

[0399] The terminal determines the transmission period i for the SFN PUCCH according to the method for determining the transmission period of the uplink channel, and if the terminal identifies that the corresponding PUCCH is simultaneously transmitted based on two TCI states according to the SFN method (upper layer parameters (applyIndicatedTCI-State and multipanelSFN-Scheme) and a specific field in the scheduling DCI (PUCCH resource indicator)), the terminal determines the transmission power by referring to ul-powerContol and pathlossReferenceRS-Id indicated by the first indicated TCI state for the scheduled PUCCH resource, and determines the transmission power by referring to ul-powerContol and pathlossReferenceRS-Id indicated by the second indicated TCI state, and simultaneously transmits in the SFN method.

[0400] FIG. 15 is a diagram illustrating the structure of a terminal in a wireless communication system according to an embodiment of the present disclosure.

[0401] Referring to FIG. 15, the terminal may include a transceiver, which refers to a terminal receiving unit (1500) and a terminal transmitting unit (1510), a memory (not shown), and a terminal processing unit (1505, or a terminal control unit or processor). Depending on the communication method of the terminal described above, the transceiver units (1500, 1510), the memory, and the terminal processing unit (1505) of the terminal may operate. However, the components of the terminal are not limited to the examples described above. For example, the terminal may include more or fewer components than the components described above. In addition, the transceiver unit, the memory, and the processor may be implemented in the form of a single chip.

[0402] A transceiver unit can transmit and receive signals to and from a base station. The signals may include control information and data. To this end, the transceiver unit may include an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that low-noise amplifies and down-converts the frequency of a received signal. However, this is only one embodiment of the transceiver unit, and the components of the transceiver unit are not limited to the RF transmitter and RF receiver.

[0403] Additionally, the transceiver can receive a signal through a wireless channel and output it to the processor, and transmit a signal output from the processor through the wireless channel.

[0404] Memory can store programs and data necessary for the terminal's operation. Furthermore, memory can store control information or data included in signals transmitted and received by the terminal. Memory can be comprised of a storage medium, such as ROM, RAM, a hard disk, CD-ROM, or DVD, or a combination of such storage media. Furthermore, there can be multiple memories.

[0405] Additionally, the processor can control a series of processes to enable the terminal to operate according to the aforementioned embodiments. For example, the processor can receive DCI consisting of two layers and control components of the terminal to simultaneously receive multiple PDSCHs. There may be multiple processors, and the processors can perform terminal component control operations by executing programs stored in memory.

[0406] FIG. 16 is a diagram illustrating the structure of a base station in a wireless communication system according to an embodiment of the present disclosure.

[0407] Referring to FIG. 16, the base station may include a transceiver, which refers to a base station receiver (1600) and a base station transmitter (1610), a memory (not shown), and a base station processor (1605, or a base station control unit or processor). Depending on the communication method of the base station described above, the transceiver (1600, 1610), the memory, and the base station processor (1605) of the base station may operate. However, the components of the base station are not limited to the examples described above. For example, the base station may include more or fewer components than the components described above. In addition, the transceiver, the memory, and the processor may be implemented in the form of a single chip.

[0408] The transceiver can transmit and receive signals with the terminal. Here, the signals may include control information and data. To this end, the transceiver may be configured with an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that low-noise amplifies and down-converts the frequency of a received signal. However, this is only one embodiment of the transceiver, and the components of the transceiver are not limited to the RF transmitter and RF receiver.

[0409] Additionally, the transceiver can receive a signal through a wireless channel and output it to the processor, and transmit the signal output from the processor through the wireless channel.

[0410] The memory can store programs and data necessary for the operation of the base station. Furthermore, the memory can store control information or data included in signals transmitted and received by the base station. The memory can be comprised of a storage medium, such as ROM, RAM, a hard disk, CD-ROM, or DVD, or a combination of such storage media. Furthermore, there can be multiple memories.

[0411] The processor can control a series of processes to enable the base station to operate according to the embodiments of the present disclosure described above. For example, the processor can configure two layers of DCIs containing allocation information for multiple PDSCHs and control each component of the base station to transmit them. There may be multiple processors, and the processors can perform component control operations of the base station by executing programs stored in memory.

[0412] The methods according to the embodiments described in the claims or specification of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

[0413] When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. The one or more programs stored in the computer-readable storage medium are configured for execution by one or more processors within an electronic device. The one or more programs include instructions that cause the electronic device to execute methods according to the embodiments described in the claims or specification of the present disclosure.

[0414] These programs (software modules, software) may be stored in random access memory, non-volatile memory including flash memory, read only memory (ROM), electrically erasable programmable read only memory (EEPROM), magnetic disc storage device, compact disc ROM (CD-ROM), digital versatile discs (DVDs) or other forms of optical storage device, magnetic cassette. Or, they may be stored in a memory configured as a combination of some or all of these. In addition, each configuration memory may be included in multiple numbers.

[0415] Additionally, the program may be stored on an attachable storage device that is accessible via a communication network, such as the Internet, an intranet, a local area network (LAN), a wide local area network (WLAN), a storage area network (SAN), or a combination thereof. Such a storage device may be connected to a device performing an embodiment of the present disclosure via an external port. Additionally, a separate storage device on the communication network may be connected to a device performing an embodiment of the present disclosure.

[0416] In the specific embodiments of the present disclosure described above, components included in the invention are expressed in the singular or plural form, depending on the specific embodiment presented. However, the singular or plural expressions are selected to suit the presented situation for convenience of explanation, and the present disclosure is not limited to singular or plural components. Components expressed in the plural form may be composed of singular elements, or components expressed in the singular form may be composed of plural elements.

[0417] Meanwhile, the embodiments of the present disclosure disclosed in this specification and drawings are only specific examples to easily explain the technical contents of the present disclosure and help understand the present disclosure, and are not intended to limit the scope of the present disclosure. In other words, it will be apparent to those skilled in the art that other modifications based on the technical idea of ​​the present disclosure are possible. In addition, the above-mentioned embodiments can be combined and operated with each other as needed. For example, parts of one embodiment of the present disclosure and parts of another embodiment can be combined with each other to operate a base station and a terminal. For example, parts of the first embodiment, the second embodiment, and the third embodiment of the present disclosure can be combined with each other to operate a base station and a terminal. In addition, although the above-mentioned embodiments have been presented based on an FDD LTE system, other modifications based on the technical idea of ​​the above-mentioned embodiments can be implemented with other systems such as a TDD LTE system, 5G, or NR system.

[0418] Meanwhile, the order of description in the drawings explaining the method of the present invention does not necessarily correspond to the order of execution, and the order of precedence may be changed or executed in parallel.

[0419] Alternatively, the drawings illustrating the method of the present invention may omit some components and include only some components within a scope that does not harm the essence of the present invention.

[0420] In addition, the method of the present invention may be implemented by combining some or all of the contents included in each embodiment within a scope that does not harm the essence of the invention.

[0421] Various embodiments of the present disclosure have been described above. The foregoing description of the present disclosure is for illustrative purposes only, and the embodiments of the present disclosure are not limited to the disclosed embodiments. Those skilled in the art will appreciate that the present disclosure can be readily modified into other specific forms without altering the technical spirit or essential characteristics of the present disclosure. The scope of the present disclosure is indicated by the claims described below rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present disclosure.

Claims

1. In the method of the terminal of the communication system, A step of receiving configuration information including information on at least one SRS (sounding reference signal) resource from a base station; A step of determining the transmission power of the SRS based on the above setting information; and A step of transmitting the SRS to the base station based on the transmission power is included, A method characterized in that, for SRS resources having the same slot index, first symbol in the slot, and number of consecutive symbols, the transmission power is determined for each SRS resource.

2. In paragraph 1, The above SRS resources include a first SRS resource and a second SRS resource, A method characterized in that, when the first SRS resource and the second SRS resource are included in the same SRS resource set, the transmission power of the first SRS resource and the second SRS resource is determined based on a parameter related to the SRS resource set.

3. In paragraph 1, The above SRS resources include a first SRS resource and a second SRS resource, A method characterized in that, when the first SRS resource is included in a first SRS resource set and the second SRS resource is included in a second SRS resource set, the transmission power of the first SRS resource is determined based on a parameter related to the first SRS resource set, and the transmission power of the second SRS resource is determined based on a parameter related to the second SRS resource set.

4. In paragraph 1, If the sum of the transmission power determined for each of the above SRS resources exceeds the maximum transmission power of the terminal, A method characterized in that the maximum transmission power of the terminal is allocated equally to each SRS resource or allocated to each SRS resource according to priority.

5. In the method of a base station of a communication system, A step of transmitting configuration information including information on at least one SRS (sounding reference signal) resource to a terminal; A step of receiving the SRS from the terminal based on the transmission power of the SRS determined based on the above setting information, A method characterized in that, for SRS resources having the same slot index, first symbol in the slot, and number of consecutive symbols, the transmission power is determined for each SRS resource.

6. In paragraph 5, The above SRS resources include a first SRS resource and a second SRS resource, A method characterized in that, when the first SRS resource and the second SRS resource are included in the same SRS resource set, the transmission power of the first SRS resource and the second SRS resource is determined based on a parameter related to the SRS resource set.

7. In paragraph 5, The above SRS resources include a first SRS resource and a second SRS resource, A method characterized in that, when the first SRS resource is included in a first SRS resource set and the second SRS resource is included in a second SRS resource set, the transmission power of the first SRS resource is determined based on a parameter related to the first SRS resource set, and the transmission power of the second SRS resource is determined based on a parameter related to the second SRS resource set.

8. In paragraph 5, If the sum of the transmission power determined for each of the above SRS resources exceeds the maximum transmission power of the terminal, A method characterized in that the maximum transmission power of the terminal is allocated equally to each SRS resource or allocated to each SRS resource according to priority.

9. At the terminal of the communication system, Transmitter and receiver; and A control unit configured to receive configuration information including information on at least one SRS (sounding reference signal) resource from a base station, determine transmission power of an SRS based on the configuration information, and transmit the SRS to the base station based on the transmission power, A terminal characterized in that, for SRS resources having the same slot index, first symbol in the slot, and number of consecutive symbols, the transmission power is determined for each SRS resource.

10. In paragraph 9, The above SRS resources include a first SRS resource and a second SRS resource, A terminal characterized in that, when the first SRS resource and the second SRS resource are included in the same SRS resource set, the transmission power of the first SRS resource and the second SRS resource is determined based on a parameter related to the SRS resource set.

11. In paragraph 9, The above SRS resources include a first SRS resource and a second SRS resource, A terminal characterized in that, when the first SRS resource is included in a first SRS resource set and the second SRS resource is included in a second SRS resource set, the transmission power of the first SRS resource is determined based on a parameter related to the first SRS resource set, and the transmission power of the second SRS resource is determined based on a parameter related to the second SRS resource set.

12. In paragraph 9, If the sum of the transmission power determined for each of the above SRS resources exceeds the maximum transmission power of the terminal, A terminal characterized in that the maximum transmission power of the terminal is allocated equally for each SRS resource or allocated for each SRS resource according to priority.

13. In the base station of the communication system, Transmitter and receiver; and A control unit configured to transmit configuration information including information on at least one SRS (sounding reference signal) resource to a terminal and receive the SRS from the terminal based on transmission power determined based on the configuration information, A base station, characterized in that, for SRS resources having the same slot index, first symbol in the slot, and number of consecutive symbols, the transmission power is determined for each SRS resource.

14. In paragraph 13, The above SRS resources include a first SRS resource and a second SRS resource, A base station, characterized in that when the first SRS resource and the second SRS resource are included in the same SRS resource set, the transmission power of the first SRS resource and the second SRS resource is determined based on a parameter related to the SRS resource set.

15. In paragraph 13, The above SRS resources include a first SRS resource and a second SRS resource, A base station, characterized in that, when the first SRS resource is included in a first SRS resource set and the second SRS resource is included in a second SRS resource set, the transmission power of the first SRS resource is determined based on a parameter related to the first SRS resource set, and the transmission power of the second SRS resource is determined based on a parameter related to the second SRS resource set.

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