Method and device for frequency hopping in wireless communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates. In particular, the present disclosure provides a method for configuring an SBFD frequency resource in a wireless communication system.

Description

Frequency hopping method and device 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 an apparatus in which a terminal can perform transmission of a Physical Uplink Shared Channel (PUSCH) and a Physical Uplink Control Channel (PUCCH) using frequency hopping in a subband non-overlapping full duplex (SBFD) resource.

[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 frequency bands below 6 GHz ('Sub 6 GHz'), such as 3.5 gigahertz (3.5 GHz), but also in ultra-high frequency bands called millimeter waves (mmWave), such as 28 GHz and 39 GHz ('Above 6 GHz'). In addition, for 6G mobile communication technology, which is referred to as a system beyond 5G, implementation in the terahertz band (e.g., the 3 terahertz (3 THz) band at 95 GHz) is being considered to achieve transmission speeds 50 times faster and ultra-low latency reduced to one-tenth compared to 5G mobile communication technology.

[0003] In the early stages of 5G mobile communication technology, aiming to satisfy service support and performance requirements for enhanced Mobile BroadBand (eMBB), Ultra-Reliable Low-Latency Communications (URLLC), and massive Machine-Type Communications (mMTC), technologies such as beamforming and Massive MIMO to mitigate path loss and increase transmission distance in ultra-high frequency bands, support for various numerologies (such as the operation of multiple subcarrier spacings) and dynamic operation of slot formats for the efficient utilization of ultra-high frequency resources, initial access techniques to support multi-beam transmission and broadband, definition and operation of Band-Width Parts (BWP), Low Density Parity Check (LDPC) codes for high-volume data transmission, new channel coding methods such as Polar Codes for the reliable transmission of control information, and L2 pre-processing (L2 Standardization has been carried out for pre-processing, network slicing which provides a dedicated network specialized for specific services, and other methods.

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

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

[0006] When such 5G mobile communication systems are commercialized, connected devices, which are increasing explosively, will be connected to communication networks. Accordingly, it is expected that there will be a need to enhance the functionality and performance of 5G mobile communication systems and to integrate the operation of connected devices. To this end, new research is planned to be conducted on 5G performance improvement and complexity reduction, support for AI services, support for metaverse services, and drone communication using eXtended Reality (XR), Artificial Intelligence (AI), and Machine Learning (ML) to efficiently support Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR).

[0007] Furthermore, the advancement of these 5G mobile communication systems encompasses multi-antenna transmission technologies such as new waveforms to guarantee coverage in the terahertz band of 6G mobile communication technology, Full Dimensional MIMO (FD-MIMO), array antennas, and large-scale antennas; metamaterial-based lenses and antennas to improve terahertz band signal coverage; high-dimensional spatial multiplexing technology using OAM (Orbital Angular Momentum); and Reconfigurable Intelligent Surface (RIS) technology; as well as Full Duplex technology for enhancing frequency efficiency and system networks in 6G mobile communication technology; AI-based communication technologies that realize system optimization by utilizing satellites and AI from the design stage and internalizing end-to-end AI support functions; and the realization of services of complexity exceeding the limits of terminal computing capabilities by utilizing ultra-high-performance communication and computing resources. It could serve as a foundation for the development of next-generation distributed computing technologies.

[0008] As a result of the aforementioned developments and advancements in wireless communication systems, it has become possible to provide various services, and thus measures are required to facilitate the smooth provision of these services.

[0009] The disclosed embodiments aim to provide an apparatus and method capable of effectively providing services in a mobile communication system. In particular, the present disclosure proposes a frequency hopping method and apparatus in Subband Non-Overlapping Full Duplex (SBFD).

[0010] The invention of the present disclosure for solving the above problem is characterized in that, in a method for processing a control signal in a wireless communication system, the method comprises: receiving a first control signal transmitted from a base station; processing the received first control signal; and transmitting a second control signal generated based on the processing to the base station.

[0011] The disclosed embodiment provides an apparatus and method capable of effectively providing services in a mobile communication system. In particular, it enables efficient frequency axis resource configuration for providing services using SBFD.

[0012] FIG. 1 is a diagram illustrating the basic structure of the time-frequency domain in a wireless communication system according to one embodiment of the present disclosure.

[0013] FIG. 2 is a drawing illustrating a frame, subframe, and slot structure in a wireless communication system according to one embodiment of the present disclosure.

[0014] FIG. 3 is a drawing illustrating an example of a bandwidth portion setting in a wireless communication system according to one embodiment of the present disclosure.

[0015] FIG. 4 is a diagram illustrating an example of setting a control area of ​​a downlink control channel in a wireless communication system according to one embodiment of the present disclosure.

[0016] 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.

[0017] FIG. 6 is a diagram illustrating a method for transmitting and receiving data in consideration of a downlink data channel and rate matching resources between a base station and a terminal in a wireless communication system according to one embodiment of the present disclosure.

[0018] FIG. 7 is a diagram illustrating an example of frequency axis resource allocation of a PDSCH in a wireless communication system according to one embodiment of the present disclosure.

[0019] FIG. 8 is a diagram illustrating an example of time-axis resource allocation of PDSCH in a wireless communication system according to one embodiment of the present disclosure.

[0020] FIG. 9 is a diagram illustrating an example of time-axis resource allocation according to the subcarrier interval of a data channel and a control channel in a wireless communication system according to one embodiment of the present disclosure.

[0021] FIG. 10 is a diagram illustrating the wireless protocol structure of a base station and a terminal in a single cell, carrier aggregation, dual connectivity situation in a wireless communication system according to one embodiment of the present disclosure.

[0022] FIG. 11 is a drawing illustrating an optional connection procedure in one embodiment of the present disclosure.

[0023] FIG. 12 is a diagram illustrating an example of SBFD operating in the TDD band of a wireless communication system to which the present disclosure applies.

[0024] FIG. 13 is a drawing illustrating a method for transmitting PUSCH repetitions according to one embodiment of the present disclosure.

[0025] FIG. 14 is a diagram illustrating a method of transmitting PUSCH iterations to SBFD symbols according to one embodiment of the present disclosure.

[0026] FIG. 15 is a diagram illustrating a method of transmitting PUSCH iterations to SBFD symbols and Non-SBFD symbols according to one embodiment of the present disclosure.

[0027] FIG. 16 is a drawing illustrating a method for transmitting PUSCH repetitions according to one embodiment of the present disclosure.

[0028] FIG. 17 is a drawing illustrating an SBFD setting according to one embodiment of the present disclosure.

[0029] FIG. 18 is a drawing illustrating a method for transmitting PUSCH repetitions according to one embodiment of the present disclosure.

[0030] FIG. 19 is a diagram illustrating a method for transmitting PUSCH repetitions over one or more set TDD patterns according to one embodiment of the present disclosure.

[0031] FIG. 20 is a drawing illustrating a method for transmitting PUSCH repetitions according to one embodiment of the present disclosure.

[0032] FIG. 21 is a diagram illustrating a method of transmitting PUSCH iterations to SBFD symbols and Non-SBFD symbols according to one embodiment of the present disclosure.

[0033] FIG. 22 is a drawing illustrating the structure of a terminal in a wireless communication system according to one embodiment of the present disclosure.

[0034] FIG. 23 is a drawing illustrating the structure of a base station in a wireless communication system according to one embodiment of the present disclosure.

[0035] FIG. 24 is a flowchart illustrating the application of frequency shift and frequency hopping according to one embodiment of the present disclosure.

[0036] FIG. 25 is a drawing illustrating a PUSCH iterative transmission with frequency shifting applied according to one embodiment of the present disclosure.

[0037] FIG. 26 is a diagram illustrating a Resource block group (RBG) grid in a PUSCH iterative transmission with frequency shifting applied according to one embodiment of the present disclosure.

[0038] FIG. 27 is a drawing illustrating a PUSCH iterative transmission with a frequency shift offset value applied to fit an RGB grid according to one embodiment of the present disclosure.

[0039] FIG. 28a is a drawing illustrating an example of applying frequency shift according to one embodiment of the present disclosure.

[0040] FIG. 28b is a drawing illustrating an example of applying frequency shift according to one embodiment of the present disclosure.

[0041] FIG. 28c is a drawing illustrating an example of applying frequency shift according to one embodiment of the present disclosure.

[0042] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the attached drawings.

[0043] In describing the embodiments, technical details that are well known in the technical field to which this disclosure belongs and are not directly related to this disclosure are omitted. This is intended to convey the essence of this disclosure more clearly without obscuring it by omitting unnecessary explanations.

[0044] For the same reason, some components in the attached drawings have been exaggerated, omitted, or schematically depicted. Additionally, the dimensions of each component do not entirely reflect their actual dimensions. Identical or corresponding components in each drawing have been assigned the same reference numbers.

[0045] The advantages and features of the present disclosure, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the 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. Throughout the specification, the same reference numerals refer to the same components. Furthermore, in describing the present disclosure, if it is determined that a detailed description of related functions or configurations might unnecessarily obscure the essence of the present disclosure, such detailed description is omitted. Additionally, the terms described below are defined considering their functions in the present disclosure, and these may vary depending on the intentions or conventions of the user or operator. Therefore, their definitions should be based on the content throughout the specification.

[0046] Hereinafter, a base station is an entity that performs resource allocation for terminals and may be at least one of a gNode B, eNode B, Node B, BS (Base Station), wireless access unit, base station controller, or a node on a network. A terminal may include a UE (User Equipment), MS (Mobile Station), cellular phone, smartphone, computer, or a multimedia system capable of performing communication functions. In this disclosure, a downlink (DL) refers to a wireless transmission path of a signal transmitted by a base station to a terminal, and an uplink (UL) refers to a wireless transmission path of a signal transmitted by a terminal to a base station. Furthermore, while LTE or LTE-A systems may be described as examples below, embodiments of this disclosure may also be applied to other communication systems having similar technical backgrounds or channel types. For example, 5th generation mobile communication technologies (5G, new radio, NR) developed after LTE-A may be included therein, and the 5G below may 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 made at the discretion of a person with skilled technical knowledge, without significantly departing from the scope of the present disclosure.

[0047] At this point, it will be understood that each block of the process flow diagrams and combinations of the flow diagrams can be executed by computer program instructions. Since these computer program instructions can be loaded into the processor of a general-purpose computer, a special-purpose computer, or other programmable data processing equipment, the instructions executed through the processor of the computer or other programmable data processing equipment create means to perform the functions described in the flow diagram block(s). Since these computer program instructions can also be stored in computer-available or computer-readable memory that can be directed toward the computer or other programmable data processing equipment to implement the function in a specific way, the instructions stored in computer-available or computer-readable memory can also produce a manufactured item containing the means of instruction to perform the function described in the flow diagram block(s). Since computer program instructions can be loaded onto a computer or other programmable data processing equipment, instructions that perform a series of operation steps on the computer or other programmable data processing equipment to create a process executed by the computer can also provide steps for executing the functions described in the flowchart block(s).

[0048] Additionally, each block may represent a module, segment, or part of code containing one or more executable instructions for executing a specific logical function(s). It should also be noted that in some alternative execution examples, the functions mentioned in the blocks may occur out of order. For example, two blocks described in succession may actually be executed substantially simultaneously, or the blocks may sometimes be executed in reverse order according to their corresponding functions.

[0049] In this embodiment, the term "part" refers to a software or hardware component such as an FPGA (Field Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit), and the "part" performs certain roles. However, the meaning of "part" is not limited to software or hardware. The "part" may be configured to reside in an addressable storage medium or may be configured to run one or more processors. Accordingly, as an example, the "part" includes components such as software components, object-oriented software components, class components, and task components, as well as processes, functions, attributes, 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." In addition, the components and 'parts' may be implemented to utilize one or more CPUs within the device or secure multimedia card. Furthermore, in the embodiment, the 'part' may include one or more processors.

[0050] Wireless communication systems are evolving from providing early voice-oriented services to broadband wireless communication systems that provide high-speed, high-quality packet data services, such as communication standards like 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.

[0051] As a representative example of the above-mentioned broadband wireless communication system, the LTE system employs the Orthogonal Frequency Division Multiplexing (OFDM) method for the downlink (DL) and the Single Carrier Frequency Division Multiple Access (SC-FDMA) method for the uplink (UL). The uplink refers to a wireless link through 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 through which a base station transmits data or control signals to a terminal. The above-mentioned multiple access method can distinguish the data or control information of each user by allocating and operating time-frequency resources to be sent for each user so that they do not overlap, that is, so that orthogonality is established.

[0052] As a future communication system following LTE, that is, a 5G communication system, it must be able to freely reflect the diverse requirements of users and service providers, and therefore, services that satisfy various requirements simultaneously must be supported. Services being considered for the 5G communication system include enhanced Mobile Broadband (eMBB), massive Machine Type Communication (mMTC), and Ultra Reliability Low Latency Communication (URLLC).

[0053] eMBB aims to provide data transmission speeds that are superior to those supported by existing LTE, LTE-A, or LTE-Pro. For example, in a 5G communication system, eMBB must be able to provide a peak data rate of 20 Gbps in the downlink and 10 Gbps in the uplink from the perspective of a single base station. Furthermore, while providing these peak data rates, the 5G communication system must also provide an increased user-perceived data rate. To satisfy these requirements, it necessitates improvements in various transmission and reception technologies, including enhanced Multi-Input Multi-Output (MIMO) transmission technology. Additionally, while LTE transmits signals using a maximum bandwidth of 20 MHz in the 2 GHz band, the 5G communication system can meet the data transmission speeds required by using a frequency bandwidth wider than 20 MHz in frequency bands of 3–6 GHz or above 6 GHz.

[0054] Simultaneously, mMTC is being considered to support application services such as the Internet of Things (IoT) in 5G communication systems. To efficiently provide IoT, mMTC requires support for a large number of terminal connections within a cell, improved terminal coverage, enhanced battery life, and reduced terminal costs. Since IoT devices are attached to various sensors and equipment to provide communication functions, the system must be able to support a large number of terminals within a cell (e.g., 1,000,000 terminals / km²). Furthermore, due to the nature of the service, terminals supporting mMTC are likely to be located in dead zones not covered by cells, such as building basements; therefore, they may require wider coverage compared to other services provided by 5G communication systems. Terminals supporting mMTC must consist of low-cost devices, and since it is difficult to frequently replace terminal batteries, a very long battery life of 10 to 15 years may be required.

[0055] Finally, URLLC is a mission-critical cellular-based wireless communication service. For example, consider services used for remote control of robots or machinery, industrial automation, unmanned aerial vehicles, remote health care, and emergency alerts. Therefore, the communication provided by URLLC must offer very low latency and very high reliability. For instance, services supporting URLLC must satisfy an air interface latency of less than 0.5 milliseconds, and simultaneously 10 -5The following packet error rate requirements apply. Therefore, for services supporting URLLC, 5G systems must provide a Transmit Time Interval (TTI) smaller than other services, and at the same time, design considerations may be required to allocate a wide resource in the frequency band to ensure the reliability of the communication link.

[0056] The three 5G services, namely eMBB, URLLC, and mMTC, can be multiplexed and transmitted within a single system. In this case, different transmission and reception techniques and parameters may be used between the services to satisfy the different requirements of each service. Of course, 5G is not limited to the three services mentioned above.

[0057] [NR Time-Frequency Resources]

[0058] The frame structure of the 5G system will be explained in more detail below with reference to the drawings.

[0059] Figure 1 is a diagram illustrating the basic structure of the time-frequency domain, which is a wireless resource domain where data or control channels are transmitted in a 5G system.

[0060] The horizontal axis of FIG. 1 represents the time domain, and the vertical axis represents the frequency domain. In the time and frequency domains, the basic unit of a resource is a resource element (RE, 101), which can be defined as one OFDM (Orthogonal Frequency Division Multiplexing) symbol (102) on the time axis and one subcarrier (103) on the frequency axis. In the frequency domain (For example, 12) consecutive REs can form a single resource block (Resource Block, RB, 104). In the time axis, a single subframe (110) may contain multiple OFDM symbols (102). For example, the length of one subframe may be 1 ms.

[0061] FIG. 2 is a drawing illustrating a frame, subframe, and slot structure in a wireless communication system according to one embodiment of the present disclosure.

[0062] FIG. 2 illustrates an example of a frame (200), subframe (201), and slot (202) structure. One frame (200) can be defined as 10ms. One subframe (201) can be defined as 1ms, and thus 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). One subframe (201) may be composed of one or more slots (202, 203), and the number of slots (202, 203) per one subframe (201) may vary depending on the setting value μ (204, 205) for the subcarrier spacing. In one example of FIG. 2, cases where μ=0 (204) and μ=1 (205) are shown as the setting value for the subcarrier spacing. When μ=0 (204), one subframe (201) may be composed of one slot (202), and when μ=1 (205), one subframe (201) may be composed of two slots (203). That is, the number of slots per one subframe ( ) may vary, and accordingly, the number of slots per frame ( ) may vary. Depending on each subcarrier spacing setting μ and It can be defined by Table 1 below.

[0063] [Table 1]

[0064]

[0065] [Bandwidth Section (BWP)]

[0066] Next, the Bandwidth Part (BWP) setting in the 5G communication system will be explained in detail with reference to the drawing.

[0067] FIG. 3 is a diagram illustrating an example of a bandwidth portion setting in a wireless communication system according to one embodiment of the present disclosure.

[0068] FIG. 3 shows an example in which the terminal bandwidth (UE bandwidth) (300) is configured into two bandwidth portions, namely bandwidth portion #1 (BWP#1) (301) and bandwidth portion #2 (BWP#2) (302). The base station may configure one or more bandwidth portions for the terminal and may configure information such as that shown in Table 2 below for each bandwidth portion.

[0069] [Table 2]

[0070]

[0071] Of course, the above examples are not limited, and various parameters related to bandwidth portions may be configured for the terminal in addition to the above configuration information. The above information may be transmitted by the base station to the terminal via upper-layer signaling, for example, Radio Resource Control (RRC) signaling. At least one of the configured bandwidth portions may be activated. Whether a configured bandwidth portion is activated may be transmitted semi-statically from the base station to the terminal via RRC signaling or dynamically via Downlink Control Information (DCI).

[0072] According to some embodiments, prior to the Radio Resource Control (RRC) connection, the terminal may receive an Initial Bandwidth Part (Initial BWP) for initial connection from the base station via a Master Information Block (MIB). More specifically, during the initial connection phase, the terminal may receive configuration information for a Control Resource Set (CORESET) and a Search Space via the MIB, through which a PDCCH can be transmitted to receive system information required for initial connection (Remaining System Information; which may correspond to RMSI or System Information Block 1; SIB1). The Control Resource Set and Search Space configured via the MIB may each be considered as Identity (ID) 0. The base station may notify the terminal via the MIB of configuration information, such as frequency allocation information, time allocation information, and numerology, for Control Resource Set #0. Additionally, the base station may notify the terminal via the MIB of configuration information regarding the monitoring period and occasion for Control Resource Set #0, i.e., configuration information for Search Space #0. The terminal may consider the frequency region set as control region #0 obtained from the MIB as the initial bandwidth portion for initial access. In this case, the identifier (ID) of the initial bandwidth portion may be considered as 0.

[0073] The settings for the bandwidth portion supported by the above 5G can be used for various purposes.

[0074] According to some embodiments, if the bandwidth supported by the terminal is smaller than the system bandwidth, this can be supported through the bandwidth portion setting. For example, by setting the frequency position of the bandwidth portion (setting information 2) to the terminal, the terminal can transmit and receive data at a specific frequency position within the system bandwidth.

[0075] In addition, according to some embodiments, a base station may set multiple bandwidth portions for a terminal for the purpose of supporting different numerologies. For example, to support data transmission and reception using both a 15 kHz subcarrier interval and a 30 kHz subcarrier interval for a terminal, two bandwidth portions may be set to subcarrier intervals of 15 kHz and 30 kHz, respectively. Different bandwidth portions may be frequency division multiplexed, and when data transmission and reception is to be performed with a specific subcarrier interval, the bandwidth portion set to that subcarrier interval may be activated.

[0076] In addition, according to some embodiments, a base station may set a bandwidth portion having different bandwidth sizes for the purpose of reducing the power consumption of the terminal. For example, if the terminal supports a very large bandwidth, such as 100 MHz, and always transmits and receives data using that bandwidth, very large power consumption may occur. In particular, in a situation where there is no traffic, performing monitoring of an unnecessary downlink control channel using a large bandwidth of 100 MHz can be very inefficient in terms of power consumption. To reduce the power consumption of the terminal, the base station may set a bandwidth portion of 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.

[0077] In the method for configuring the above bandwidth portion, terminals prior to RRC connection (Connected) can receive configuration information for the Initial Bandwidth Part through the Master Information Block (MIB) during the initial connection phase. More specifically, the terminal can receive a Control Resource Set (CORESET) for a downlink control channel through which Downlink Control Information (DCI) scheduling System Information Blocks (SIB) can be transmitted from the MIB of the Physical Broadcast Channel (PBCH). The bandwidth of the control resource set by the MIB can be considered as the Initial Bandwidth Part, and through the configured Initial Bandwidth Part, the terminal can receive the Physical Downlink Shared Channel (PDSCH) through which SIBs are transmitted. In addition to receiving SIBs, the Initial Bandwidth Part may also be utilized for Other System Information (OSI), paging, and Random Access.

[0078] [Bandwidth Section (BWP) Change]

[0079] When one or more bandwidth parts are set for a terminal, the base station may instruct the terminal to change (or switch, transition) the bandwidth part using the Bandwidth Part Indicator field within the DCI. For example, in FIG. 3, if the currently active bandwidth part of the terminal is Bandwidth Part #1 (301), the base station may instruct the terminal to Bandwidth Part #2 (302) using the Bandwidth Part Indicator within the DCI, and the terminal may perform a bandwidth part change to Bandwidth Part #2 (302) indicated by the received Bandwidth Part Indicator within the DCI.

[0080] As mentioned above, since DCI-based bandwidth portion changes can be directed by the DCI scheduling PDSCH or PUSCH, when a terminal receives a bandwidth portion change request, it must be able to receive or transmit the PDSCH or PUSCH scheduled by the corresponding DCI in the changed bandwidth portion without difficulty. To this end, the standard specifies the delay time (T) required when changing the bandwidth portion. BWP The requirements for ) have been defined, and can be defined as, for example, as shown in Table 3.

[0081] [Table 3]

[0082]

[0083] *

[0084] The requirements for bandwidth portion change delay time support Type 1 or Type 2 depending on the terminal's capability. The terminal can report the supported bandwidth portion delay time type to the base station.

[0085] In accordance with the aforementioned requirements for the bandwidth portion change delay time, if the terminal receives a DCI containing a bandwidth portion change indicator in slot n, the terminal performs a change to the new bandwidth portion indicated by the bandwidth portion change indicator in slot n+T BWP Completion can be performed at a time no later than the new bandwidth portion, and transmission and reception for the data channel scheduled by the corresponding DCI can be performed in the changed new bandwidth portion. If the base station intends to schedule a data channel in the new bandwidth portion, the terminal's bandwidth portion change delay time (T BWPBy considering ), time-domain resource allocation for a data channel can be determined. That is, when a base station schedules a data channel with a new bandwidth portion, in the method for determining time-domain resource allocation for a data channel, the data channel can be scheduled after the bandwidth portion change delay time. Accordingly, the terminal [is notified] that the DCI instructing the bandwidth portion change is the bandwidth portion change delay time (T BWP You may not expect to indicate a slot offset (K0 or K2) value smaller than )

[0086] If a terminal receives a DCI (e.g., DCI format 1_1 or 0_1) instructing a change in the bandwidth portion, the terminal may not perform any transmission or reception during a time interval corresponding to the time interval from the third symbol of the slot in which the PDCCH containing the said DCI was received to the beginning of the slot indicated by the slot offset value (K0 or K2) indicated by the time domain resource allocation indicator field within the said DCI. For example, if a terminal receives a DCI instructing a change in the bandwidth portion in slot n, and the slot offset value indicated by the said 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).

[0087] [SS / PBCH Block]

[0088] Next, we will explain the SS (Synchronization Signal) / PBCH block in 5G.

[0089] An SS / PBCH block may refer to a physical layer channel block composed of PSS (Primary SS), SSS (Secondary SS), and PBCH. Specifically, it is as follows.

[0090] - PSS: A signal that serves as the reference for downlink time / frequency synchronization and provides some information about the cell ID.

[0091] - SSS: Serves as the reference for downlink time / frequency synchronization and provides the remaining cell ID information not provided by PSS. Additionally, it can serve as a reference signal for PBCH demodulation.

[0092] - PBCH: Provides essential system information required for transmitting and receiving data channels and control channels of the terminal. The essential system information may include search space-related control information representing wireless resource mapping information of the control channel, scheduling control information for a separate data channel that transmits system information, etc.

[0093] - SS / PBCH block: An SS / PBCH block is composed of a combination of PSS, SSS, and PBCH. One or more SS / PBCH blocks may be transmitted within a time of 5ms, and each transmitted SS / PBCH block may be distinguished by an index.

[0094] The terminal can detect PSS and SSS during the initial connection phase and can decode PBCH. It can obtain MIB from PBCH and receive Control Resource Set (CORESET) #0 from it (which may correspond to a control resource set with a control resource set index of 0). The terminal can perform monitoring of Control Resource Set #0 by assuming that the selected SS / PBCH block and the Demodulation Reference Signal (DMRS) transmitted from Control Resource Set #0 are Quasi-Co-Locations (QCL). The terminal can receive system information using downlink control information transmitted from Control Resource Set #0. The terminal can obtain configuration information related to Random Access Channel (RACH) required for initial connection from the received system information. The terminal can transmit Physical RACH (PRACH) to the base station considering the selected SS / PBCH index, and the base station receiving the PRACH can obtain information regarding the SS / PBCH block index selected by the terminal. The base station can know that the terminal has selected a block among the respective SS / PBCH blocks and is monitoring the associated control area #0.

[0095] [PDCCH: DCI related]

[0096] Next, Downlink Control Information (DCI) in 5G systems will be explained in detail.

[0097] 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 the base station to the terminal via DCI. The terminal can monitor the fallback DCI format and the non-fallback DCI format for PUSCH or PDSCH. The fallback DCI format may consist of fixed fields selected between the base station and the terminal, and the non-fallback DCI format may include configurable fields.

[0098] DCI can be transmitted through the Physical Downlink Control Channel (PDCCH) after undergoing channel coding and modulation processes. A Cyclic Redundancy Check (CRC) is attached to the DCI message payload, and the CRC can be scrambled into a Radio Network Temporary Identifier (RNTI) corresponding to the terminal's identity. Different RNTIs may be used depending on the purpose of the DCI message, such as UE-specific data transmission, power control commands, or random access responses. In other words, the RNTI is not transmitted explicitly but is included in the CRC calculation process. Upon receiving a DCI message transmitted over the PDCCH, the terminal checks the CRC using the assigned RNTI; if the CRC check result is correct, the terminal knows that the message has been transmitted to it.

[0099] For example, a DCI scheduling a PDSCH for System Information (SI) can be scrambled to SI-RNTI. A DCI scheduling a PDSCH for Random Access Response (RAR) messages can be scrambled to RA-RNTI. A DCI scheduling a PDSCH for Paging messages can be scrambled to P-RNTI. A DCI notifying a Slot Format Indicator (SFI) can be scrambled to SFI-RNTI. A DCI notifying Transmit Power Control (TPC) can be scrambled to TPC-RNTI. A DCI scheduling a terminal-specific PDSCH or PUSCH can be scrambled to C-RNTI (Cell RNTI).

[0100] DCI format 0_0 can be used as a countermeasure 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 information in Table 4.

[0101] [Table 4]

[0102]

[0103] DCI format 0_1 ​​can be used as a non-defense DCI for scheduling PUSCH, whereby the CRC can be scrambled with C-RNTI. DCI format 0_1 ​​with the CRC scrambled with C-RNTI may include, for example, the information in Table 5 below.

[0104] [Table 5]

[0105]

[0106]

[0107]

[0108]

[0109] DCI format 1_0 can be used as a countermeasure DCI for scheduling PDSCH, whereby the CRC can be scrambled with C-RNTI. DCI format 1_0 with the CRC scrambled with C-RNTI may include, for example, the information in Table 6 below.

[0110] [Table 6]

[0111]

[0112] DCI format 1_1 can be used as a non-defense DCI for scheduling PDSCH, whereby the CRC can be scrambled with C-RNTI. DCI format 1_1 with the CRC scrambled with C-RNTI may include, for example, the information in Table 7 below.

[0113] [Table 7]

[0114]

[0115]

[0116] [PDCCH: CORESET, REG, CCE, Search Space]

[0117] In the following, the downlink control channel in a 5G communication system will be explained in more detail with reference to the drawings.

[0118] FIG. 4 illustrates an example of a control resource set (CORESET) in which a downlink control channel is transmitted in a 5G wireless communication system. FIG. 4 illustrates an example in which two control resources (control resource #1 (401), control resource #2 (402)) are set within a terminal bandwidth part (UE bandwidth part) (410) on the frequency axis and one slot (420) on the time axis. The control resources (401, 402) can be set in a specific frequency resource (403) within the entire terminal bandwidth part (410) on the frequency axis. On the time axis, they can be set with one or more OFDM symbols and can be defined as the control resource set duration (Control Resource Set Duration, 404). Referring to the example illustrated in FIG. 4, control resource #1 (401) is set with a control resource length of 2 symbols, and control resource #2 (402) is set with a control resource length of 1 symbol.

[0119] The control domain in the aforementioned 5G can be configured by a base station to a terminal through upper-layer signaling (e.g., System Information, Master Information Block (MIB), Radio Resource Control (RRC) signaling). Configuring a control domain to a terminal means providing information such as a control domain identifier, the frequency location of the control domain, and the symbol length of the control domain. For example, it may include the information in Table 8.

[0120] [Table 8]

[0121]

[0122] 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 area.

[0123] FIG. 5 is a diagram showing an example of a basic unit of time and frequency resources that constitute a downlink control channel that can be used in 5G. According to FIG. 5, the basic unit of time and frequency resources that constitute a control channel can be called a REG (Resource Element Group, 503), and the REG (503) can be defined as 1 OFDM symbol (501) on the time axis and 1 PRB (Physical Resource Block, 502) on the frequency axis, that is, 12 subcarriers. A base station can construct a downlink control channel allocation unit by concatenating REGs (503).

[0124] 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), then 1 CCE (504) can be composed of multiple REGs (503). For example, the REG (503) illustrated in FIG. 5 can be composed of 12 REs, and if 1 CCE (504) is composed of 6 REGs (503), then 1 CCE (504) can be composed of 72 REs. When a downlink control area is established, the area 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 area. The CCEs (504) in the control area are distinguished by numbers, and the numbers of the CCEs (504) can be assigned according to a logical mapping method.

[0125] The basic unit of the downlink control channel, namely the REG (503) shown in FIG. 5, may include both the REs to which the DCI is mapped and the DMRS (505), which is a reference signal for decoding, to which the area is mapped. As shown in FIG. 5, three DMRS (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 the 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 consisting of CCEs that a terminal must attempt to decode at a given aggregation level, and since there are various aggregation levels that form a group of 1, 2, 4, 8, or 16 CCEs, a terminal may have multiple search spaces. A search space set can be defined as a set of search spaces at all configured aggregation levels.

[0126] Search spaces can be classified into common search spaces and UE-specific search spaces. A certain group of terminals or all terminals may examine the common search space of the PDCCH to receive cell-common control information, such as dynamic scheduling or paging messages regarding system information. For example, PDSCH scheduling allocation information for the transmission of SIBs containing cell operator information can be received by examining the common search space of the PDCCH. In the case of the common search space, since a certain group of terminals or all terminals must receive the PDCCH, it can be defined as a pre-arranged set of CCEs. Scheduling allocation information for a UE-specific PDSCH or PUSCH can be received by examining the UE-specific search space of the PDCCH. The UE-specific search space can be defined specifically as a function of the terminal's identity and various system parameters.

[0127] In 5G, parameters for the search space for a PDCCH can be configured from the base station to the terminal via upper-layer signaling (e.g., SIB, MIB, RRC signaling). For example, the base station may configure the terminal the number of PDCCH candidates at each aggregation level L, the monitoring period for the search space, the occasion for monitoring in slot-symbol units 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 search space, and the control domain index to be monitored in the search space. For example, the information in Table 9 may be included.

[0128] [Table 9]

[0129]

[0130]

[0131]

[0132] According to the configuration information, the base station may set one or multiple sets of search spaces for the terminal. According to some embodiments, the base station may set search space set 1 and search space set 2 for the terminal, and may set DCI format A scrambled with X-RNTI in search space set 1 to be monitored in a common search space, and may set DCI format B scrambled with Y-RNTI in search space set 2 to be monitored in a terminal-specific search space.

[0133] According to the configuration information, one or more sets of search spaces may exist in a common search space or a terminal-specific search space. For example, Search Space Set #1 and Search Space Set #2 may be configured as a common search space, and Search Space Set #3 and Search Space Set #4 may be configured as a terminal-specific search space.

[0134] In the common search space, the following combinations of DCI formats and RNTI can be monitored. Of course, they are not limited to the examples below.

[0135] - 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

[0136] - DCI format 2_0 with CRC scrambled by SFI-RNTI

[0137] - DCI format 2_1 with CRC scrambled by INT-RNTI

[0138] - DCI format 2_2 with CRC scrambled by TPC-PUSCH-RNTI, TPC-PUCCH-RNTI

[0139] - DCI format 2_3 with CRC scrambled by TPC-SRS-RNTI

[0140] In terminal-specific search spaces, the following combinations of DCI formats and RNTI can be monitored. Of course, they are not limited to the examples below.

[0141] - DCI format 0_0 / 1_0 with CRC scrambled by C-RNTI, CS-RNTI, TC-RNTI

[0142] - DCI format 1_0 / 1_1 with CRC scrambled by C-RNTI, CS-RNTI, TC-RNTI

[0143]

[0144] The specified RNTIs may follow the definitions and uses below.

[0145] C-RNTI (Cell RNTI): Used for terminal-specific PDSCH scheduling

[0146] TC-RNTI (Temporary Cell RNTI): Used for terminal-specific PDSCH scheduling

[0147] CS-RNTI (Configured Scheduling RNTI): Used for semi-statically configured terminal-specific PDSCH scheduling.

[0148] RA-RNTI (Random Access RNTI): Used for PDSCH scheduling during the random access phase

[0149] P-RNTI (Paging RNTI): Used for PDSCH scheduling where paging is transmitted.

[0150] SI-RNTI (System Information RNTI): Used for PDSCH scheduling where system information is transmitted.

[0151] INT-RNTI (Interruption RNTI): Used to indicate whether PDSCH is pucturing.

[0152] TPC-PUSCH-RNTI (Transmit Power Control for PUSCH RNTI): Used to instruct power control commands to the PUSCH

[0153] TPC-PUCCH-RNTI (Transmit Power Control for PUCCH RNTI): Used to instruct power control commands to the PUCCH

[0154] TPC-SRS-RNTI (Transmit Power Control for SRS RNTI): Used to instruct power regulation commands to the SRS

[0155] The aforementioned specified DCI formats may follow definitions such as the examples in Table 10.

[0156] [Table 10]

[0157]

[0158] In 5G, the search space of aggregation level L in the CORESET p and search space set s of the system can be expressed as Equation 1 below.

[0159]

[0160] In 5G, as multiple sets of search spaces can be configured with different parameters (e.g., the parameters in Table 9), the set of search space sets monitored by the terminal at each point in time may vary. 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 may monitor both search space set #1 and search space set #2 in a specific slot, and monitor either search space set #1 or search space set #2 in a specific slot.

[0161] [Regarding Rate Matching / Puncturing]

[0162] In the following, the rate matching operation and puncturing operation will be described in detail.

[0163] When a time and frequency resource A intended to transmit an arbitrary symbol sequence A overlaps with an arbitrary time and frequency resource B, rate matching or puncturing operations may be considered as transmission and reception operations of channel A, taking into account the area resource C where resource A and resource B overlap. Specific operations may follow the details below.

[0164] Rate Matching Operation

[0165] - A base station may transmit a symbol sequence A to a terminal by mapping Channel A only to the remaining resource area, excluding Resource C which corresponds to the area overlapping with Resource B, from the entire Resource A. For example, if symbol sequence A consists of {Symbol #1, Symbol #2, Symbol #3, Symbol 4}, Resource A is {Resource #1, Resource #2, Resource #3, Resource #4}, and Resource B is {Resource #3, Resource #5}, the base station may sequentially map and send symbol sequence A to the remaining resources {Resource #1, Resource #2, Resource #4}, excluding {Resource #3} which corresponds to Resource C within Resource A. Consequently, the base station may transmit the symbol sequence {Symbol #1, Symbol #2, Symbol #3} by mapping it to {Resource #1, Resource #2, Resource #4}, respectively.

[0166] The terminal can determine Resource A and Resource B from scheduling information regarding Symbol Sequence A from the base station, and thereby determine Resource C, which is the area where Resource A and Resource B overlap. The terminal can receive Symbol Sequence A by assuming that Symbol Sequence A was transmitted by mapping it to the remaining area of ​​Resource A, excluding Resource C. For example, if Symbol Sequence A consists of {Symbol #1, Symbol #2, Symbol #3, Symbol #4}, Resource A is {Resource #1, Resource #2, Resource #3, Resource #4}, and Resource B is {Resource #3, Resource #5}, the terminal can receive Symbol Sequence A by assuming that it was sequentially mapped to the remaining resources {Resource #1, Resource #2, Resource #4}, excluding {Resource #3}, which corresponds to Resource C. Consequently, the terminal can perform a series of subsequent reception operations by assuming that Symbol Sequence {Symbol #1, Symbol #2, Symbol #3} was transmitted by mapping it to {Resource #1, Resource #2, Resource #4}, respectively.

[0167] Puncturing action

[0168] If there is a resource C corresponding to an area overlapping with resource B among all resources A to which the base station intends to transmit symbol sequence A to a terminal, the base station maps symbol sequence A to the entire resource A, but does not perform transmission in the resource area corresponding to resource C, and can perform transmission only in the remaining resource area of ​​resource A excluding resource C. For example, if symbol sequence A consists of {Symbol #1, Symbol #2, Symbol #3, Symbol #4}, resource A is {Resource #1, Resource #2, Resource #3, Resource #4}, and resource B is {Resource #3, Resource #5}, the base station can map symbol sequence A {Symbol #1, Symbol #2, Symbol #3, Symbol #4} to resource A {Resource #1, Resource #2, Resource #3, Resource #4} respectively, and can transmit only the symbol sequence {Symbol #1, Symbol #2, Symbol #4} corresponding to the remaining resources {Resource #1, Resource #2, Resource #4}, excluding {Resource #3} corresponding to resource C, and may not transmit {Symbol #3} mapped to {Resource #3} corresponding to resource C. Consequently, the base station can map and transmit the symbol sequence {Symbol #1, Symbol #2, Symbol #4} to {Resource #1, Resource #2, Resource #4} respectively.

[0169] The terminal can determine resources A and B from scheduling information for symbol sequence A from the base station, and thereby determine resource C, which is the area where resources A and B overlap. The terminal can receive symbol sequence A by assuming that symbol sequence A is mapped to the entire resource A, but is transmitted only in the remaining area of ​​resource A excluding resource C. For example, if symbol sequence A consists of {Symbol #1, Symbol #2, Symbol #3, Symbol #4}, resource A is {Resource #1, Resource #2, Resource #3, Resource #4}, and resource B is {Resource #3, Resource #5}, the terminal can assume that symbol sequence A {Symbol #1, Symbol #2, Symbol #3, Symbol #4} is mapped to resource A {Resource #1, Resource #2, Resource #3, Resource #4} respectively, but {Symbol #3} mapped to {Resource #3} corresponding to resource C is not transmitted, and can receive by assuming that symbol sequence {Symbol #1, Symbol #2, Symbol #4} corresponding to the remaining resources {Resource #1, Resource #2, Resource #4}—excluding {Resource #3} corresponding to resource C—is mapped and transmitted. Consequently, the terminal can perform a subsequent series of receiving operations by assuming that the symbol sequence {Symbol #1, Symbol #2, Symbol #4} has been transmitted and mapped to {Resource #1, Resource #2, Resource #4}, respectively.

[0170] In the following, a method for configuring rate matching resources for the purpose of rate matching in a 5G communication system is described. Rate matching refers to the adjustment of the signal size by considering the amount of resources available to transmit the signal. For example, rate matching of a data channel may mean that the data channel is mapped to a specific time and frequency resource range so that the data size is adjusted accordingly without transmission.

[0171] FIG. 6 is a diagram illustrating a method for a base station and a terminal to transmit and receive data by considering downlink data channels and rate matching resources.

[0172] FIG. 6 illustrates a downlink data channel (PDSCH, 601) and a rate matching resource (602). A base station may set one or more rate matching resources (602) to a terminal through upper layer signaling (e.g., RRC signaling). The rate matching resource (602) setting information may include time-axis resource allocation information (603), frequency-axis resource allocation information (604), and period information (605). In the following, the bitmap corresponding to the frequency-axis resource allocation information (604) is named the “first bitmap,” the bitmap corresponding to the time-axis resource allocation information (603) is named the “second bitmap,” and the bitmap corresponding to the period information (605) is named the “third bitmap.” If all or part of the time and frequency resources of a scheduled data channel (601) overlap with a set rate matching resource (602), the base station can transmit the data channel (601) by rate matching it in the rate matching resource (602) portion, and the terminal can perform reception and decoding after assuming that the data channel (601) is rate matched in the rate matching resource (602) portion.

[0173] The base station can dynamically notify the terminal via DCI whether to rate match a data channel in the above-mentioned rate matching resource portion through additional settings (corresponding to the “rate matching indicator” within the aforementioned DCI format). Specifically, the base station can select some of the above-mentioned rate matching resources and group them into rate matching resource groups, and can indicate to the terminal via DCI using a bitmap method whether to rate match a data channel for each rate matching resource group. For example, if four rate matching resources, RMR#1, RMR#2, RMR#3, and RMR#4, are set, the base station can set RMG#1={RMR#1, RMR#2} and RMG#2={RMR#3, RMR#4} as rate matching groups, and can indicate to the terminal via a bitmap whether to rate match in RMG#1 and RMG#2, respectively, using 2 bits within the DCI field. For example, you can indicate “1” when rate matching is required and “0” when rate matching is not required.

[0174] In 5G, the granularity of “RB symbol level” and “RE level” is supported by setting the aforementioned rate matching resources to the terminal. More specifically, the following setting method may be followed.

[0175] RB symbol level

[0176] The terminal can receive up to four RateMatchPatterns as upper layer signaling for each bandwidth portion, and one RateMatchPattern may include the following contents.

[0177] - As a Reserved Resource within the bandwidth portion, a resource may be included in which the time and frequency resource domains of the said Reserved Resource are set as a combination of an RB level bitmap and a symbol level bitmap along the frequency axis. The said Reserved Resource may span across one or two slots. A time domain pattern (periodicityAndPattern) in which the time and frequency domains composed of each RB level and symbol level bitmap pair are repeated may be additionally set.

[0178] - It may include time and frequency domain resource areas set as control resource sets within the bandwidth portion, and resource areas corresponding to time domain patterns set as search space settings where the resource areas are repeated.

[0179] RE level

[0180] The terminal can receive the following settings through upper-layer signaling.

[0181] - Configuration information for an RE corresponding to an LTE CRS (Cell-specific Reference Signal or Common Reference Signal) pattern (lte-CRS-ToMatchAround) may include the number of ports of the LTE CRS (nrofCRS-Ports) and the LTE-CRS-vshift(s) value (v-shift), the location information of the LTE carrier's center subcarrier (carrierFreqDL) from a reference frequency point (e.g., reference point A), the LTE carrier's bandwidth size (carrierBandwidthDL) information, and subframe configuration information corresponding to a Multiast-broadcast single-frequency network (mbsfn-SubframConfigList). Based on the aforementioned information, the terminal can determine the location of the CRS within an NR slot corresponding to an LTE subframe.

[0182] - It may include configuration information for resource sets corresponding to one or more ZP (Zero Power) CSI-RS within the bandwidth portion.

[0183] [PDSCH: Regarding Frequency Resource Allocation]

[0184] FIG. 7 is a diagram illustrating an example of frequency axis resource allocation of a physical downlink shared channel (PDSCH) in a wireless communication system according to one embodiment of the present disclosure.

[0185] FIG. 7 is a diagram illustrating three frequency axis resource allocation methods that can be configured through the upper layer in an NR wireless communication system: type 0 (7-00), type 1 (7-05), and dynamic switch (7-10).

[0186] Referring to FIG. 7, if the terminal is configured to use only resource type 0 through upper layer signaling (7-00), some downlink control information (DCI) that assigns PDSCH to the terminal includes a bitmap consisting of NRBG bits. The conditions for this will be explained later. In this case, NRBG refers to the number of RBGs (resource block groups) determined as shown in [Table 11] below according to the BWP size assigned by the BWP indicator and the upper layer parameter rbg-Size, and data is transmitted to the RBG indicated as 1 by the bitmap.

[0187]

[0188] If the terminal is configured to use only resource type 1 through upper layer signaling (7-05), some DCIs that assign PDSCH to the terminal are It includes frequency axis resource allocation information consisting of bits. The conditions for this will be explained later. Through this, the base station can set the starting VRB (7-20) and the length (7-25) of the frequency axis resources continuously allocated therefrom.

[0189] If the terminal is configured to use both resource type 0 and resource type 1 through upper layer signaling (7-10), some DCIs that allocate PDSCH to the terminal include frequency axis resource allocation information consisting of bits of the larger value (7-35) of the payload (7-15) for setting resource type 0 and the payload (7-20, 7-25) for setting resource type 1. The conditions for this will be explained later. At this time, one bit may be added to the beginning part (MSB) of the frequency axis resource allocation information within the DCI, and if the bit has a value of '0', it indicates that resource type 0 is used, and if it has a value of '1', it indicates that resource type 1 is used.

[0190] [PDSCH / PUSCH: Time Resource Allocation]

[0191] The following describes a time-domain resource allocation method for data channels in next-generation mobile communication systems (5G or NR systems).

[0192] The base station may set a table for time-domain resource allocation information for the Physical Downlink Shared Channel (PDSCH) and the Physical Uplink Shared Channel (PUSCH) for the terminal using upper-layer signaling (e.g., RRC signaling). For PDSCH, a table consisting of a maximum of maxNrofDL-Allocations = 16 entries may be set, and for PUSCH, a table consisting of a maximum of maxNrofUL-Allocations = 16 entries may be set. In one embodiment, the time domain resource allocation information may include PDCCH-to-PDSCH slot timing (corresponding to a slot-unit time interval between the time when the PDCCH is received and the time when the PDSCH scheduled by the received PDCCH is transmitted, denoted as K0), PDCCH-to-PUSCH slot timing (corresponding to a slot-unit time interval between the time when the PDCCH is received and the time when the PUSCH scheduled by the received PDCCH is transmitted, denoted as K2), information regarding the position and length of the start symbol in which the PDSCH or PUSCH is scheduled within the slot, and the mapping type of the PDSCH or PUSCH. For example, information such as [Table 12] or [Table 13] below may be transmitted from the base station to the terminal.

[0193] PDSCH-TimeDomainResourceAllocationList ::= SEQUENCE (SIZE(1..maxNrofDL-Allocations)) OF PDSCH-TimeDomainResourceAllocationPDSCH-TimeDomainResourceAllocation ::= SEQUENCE {k0 INTEGER(0..32) OPTIONAL, -- Need SmappingType ENUMERATED {typeA, typeB},startSymbolAndLength INTEGER (0..127)}

[0194] PUSCH-TimeDomainResourceAllocationList ::= SEQUENCE (SIZE(1..maxNrofUL-Allocations)) OF PUSCH-TimeDomainResourceAllocationPUSCH-TimeDomainResourceAllocation ::= SEQUENCE {k2 INTEGER(0..32) OPTIONAL, -- Need SmappingType ENUMERATED {typeA, typeB},startSymbolAndLength INTEGER (0..127)}

[0195] The base station may notify the terminal of one of the entries in the table for the time domain resource allocation information described above via L1 signaling (e.g., DCI) (e.g., indicated by the 'time domain resource allocation' field within the DCI). The terminal may obtain time domain resource allocation information for PDSCH or PUSCH based on the DCI received from the base station.

[0196] FIG. 8 is a diagram illustrating an example of time-axis resource allocation of PDSCH in a wireless communication system according to one embodiment of the present disclosure.

[0197] Referring to FIG. 8, the base station uses the upper layer to set the subcarrier spacing (SCS) (μ) of the data channel and control channel. PDSCH , μ PDCCH The time axis position of the PDSCH resource can be indicated according to the scheduling offset (K0) value, and the OFDM symbol start position (8-00) and length (8-05) within a slot that are dynamically indicated through DCI.

[0198] FIG. 9 is a diagram illustrating an example of time-axis resource allocation according to the subcarrier interval of a data channel and a control channel in a wireless communication system according to one embodiment of the present disclosure.

[0199] Referring to FIG. 9, when the subcarrier spacing of the data channel and the control channel is the same (9-00, μ PDSCH = μ PDCCH ), since the slot numbers for data and control are the same, the base station and the terminal can generate a scheduling offset by aligning with a predetermined slot offset K0. On the other hand, when the subcarrier spacing of the data channel and the control channel is different (9-05, μ PDSCH ≠μ PDCCH Since the slot numbers for data and control are different, the base station and the terminal can generate a scheduling offset based on the subcarrier interval of the PDCCH and in accordance with a predetermined slot offset K0.

[0200] [PUSCH: Regarding transmission method]

[0201] Next, the scheduling method for PUSCH transfers is described. PUSCH transfers can be dynamically scheduled by UL grants within the DCI, or operated by configured grant Type 1 or Type 2. Dynamic scheduling instructions for PUSCH transfers can be in DCI format 0_0 or 0_1.

[0202] Configured grant Type 1 PUSCH transmissions can be semi-statically configured by receiving configuredGrantConfig, which includes rrc-ConfiguredUplinkGrant from [Table 14], through the upper signaling, without receiving UL grants within the DCI. Configured grant Type 2 PUSCH transmissions can be semi-continuously scheduled by UL grants within the DCI after receiving configuredGrantConfig, which does not include rrc-ConfiguredUplinkGrant from [Table 14], through the upper signaling. When a PUSCH transmission is operated by a configured grant, the parameters applied to the PUSCH transmission are applied through configuredGrantConfig, the upper signaling of [Table 14], with the exception of dataScramblingIdentityPUSCH, txConfig, codebookSubset, maxRank, and scaling of UCI-OnPUSCH, which are provided by pusch-Config, the upper signaling of [Table 15]. If the terminal is provided with transformPrecoder in configuredGrantConfig, which is the upper signaling of [Table 14], the terminal applies tp-pi2BPSK in pusch-Config of [Table 15] to PUSCH transmissions operated by the configured grant.

[0203] 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...}.

[0204] 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 and a non-codebook-based transmission method, respectively, depending on whether the value of txConfig in pusch-Config in [Table 15], the upper signaling, is 'codebook' or 'nonCodebook'.

[0205] As described above, PUSCH transmissions can be dynamically scheduled via DCI format 0_0 or 0_1 and semi-statically configured by a configured grant. If a terminal is instructed to schedule a PUSCH transmission via DCI format 0_0, the terminal performs beam configuration for the PUSCH transmission using the pucch-spatialRelationInfoID corresponding to the terminal-specific PUCCH resource corresponding to the minimum ID within the active uplink BWP in the serving cell, wherein the PUSCH transmission is based on a single antenna port. The terminal does not expect scheduling for the PUSCH transmission via DCI format 0_0 within a BWP where the PUCCH resource containing pucch-spatialRelationInfo is not configured. If the terminal is not configured with txConfig within pusch-Config of [Table 15], the terminal does not expect to be scheduled via DCI format 0_1.

[0206] 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...}.

[0207] Next, codebook-based PUSCH transmission is described. Codebook-based PUSCH transmission can be dynamically scheduled via DCI format 0_0 or 0_1 and can operate semi-statically via a configured grant. When codebook-based PUSCH is dynamically scheduled via DCI format 0_1 ​​or semi-statically configured via a configured grant, the terminal determines the precoder for PUSCH transmission based on the SRS Resource Indicator (SRI), Transmission Precoding Matrix Indicator (TPMI), and the transmission rank (number of PUSCH transmission layers). In this case, the SRI can be provided via the SRS resource indicator field within the DCI or configured via the higher-level signaling srs-ResourceIndicator. When transmitting codebook-based PUSCH, the terminal is configured with at least one SRS resource and can be configured with up to two. When a terminal receives an SRI via DCI, the SRS resource indicated by the SRI refers to the SRS resource corresponding to the SRI among the SRS resources transmitted prior to the PDCCH containing the SRI. Additionally, the TPMI and transmission rank may be provided through the fields 'precoding information' and 'number of layers' within the DCI, or configured through the higher-level signaling 'precodingAndNumberOfLayers'. The TPMI is used to indicate the precoder applied to the PUSCH transmission. If the terminal is configured with a single SRS resource, the TPMI is used to indicate the precoder to be applied to that single configured SRS resource.If the terminal is configured with multiple SRS resources, TPMI is used to specify the precoder to be applied to the SRS resource indicated by SRI.

[0208] 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 signaling SRS-Config. In codebook-based PUSCH transmission, the terminal determines the codebook subset based on TPMI and the codebookSubset in the upper signaling pusch-Config. The codebookSubset in the upper signaling pusch-Config can be set to one of 'fullyAndPartialAndNonCoherent', 'partialAndNonCoherent', or 'nonCoherent' based on the UE capability reported by the terminal to the base station. If the terminal reports 'partialAndNonCoherent' as the UE capability, the terminal does not expect the value of the upper signaling codebookSubset to be set to 'fullyAndPartialAndNonCoherent'. Additionally, if the terminal reports 'nonCoherent' as a UE capability, the terminal does not expect the value of the parent signaling codebookSubset to be set to 'fullyAndPartialAndNonCoherent' or 'partialAndNonCoherent'. If nrofSRS-Ports in the parent signaling SRS-ResourceSet points to two SRS antenna ports, the terminal does not expect the value of the parent signaling codebookSubset to be set to 'partialAndNonCoherent'.

[0209] A terminal may receive one SRS resource set in which the value of usage in the upper signaling SRS-ResourceSet is set to 'codebook', and one SRS resource within that SRS resource set may be indicated via SRI. If multiple SRS resources are set in the SRS resource set in which the value of usage 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 will be set to the same value for all SRS resources.

[0210] The terminal transmits one or more SRS resources included in an SRS resource set in which the usage value is set to 'codebook' according to the upper signaling to the base station, and the base station selects one of the SRS resources transmitted by the terminal and instructs the terminal to perform PUSCH transmission using the transmit beam information of the corresponding SRS resource. In this case, in codebook-based PUSCH transmission, SRI is used as information to select the index of one SRS resource and is included in the DCI. Additionally, the base station includes information in the DCI that instructs the TPMI and rank to be used by the terminal for PUSCH transmission. The terminal performs PUSCH transmission using the SRS resource instructed by the SRI, by applying the instructed rank and the precoder instructed by the TPMI based on the transmit beam of the corresponding SRS resource.

[0211] Next, non-codebook-based PUSCH transmission is described. Non-codebook-based PUSCH transmission can be dynamically scheduled via DCI format 0_0 or 0_1 and can operate semi-statically via configured grant. If at least one SRS resource is configured within an SRS resource set in which the value of usage within the upper signaling SRS-ResourceSet is set to 'nonCodebook', the terminal can receive a non-codebook-based PUSCH transmission scheduled via DCI format 0_1.

[0212] For an SRS resource set in which the value of usage within the upper signaling SRS-ResourceSet is set to 'nonCodebook', the terminal can receive one connected NZP CSI-RS resource (non-zero power CSI-RS). The terminal 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 terminal is less than 42 symbols, the terminal does not expect the information for the precoder for SRS transmission to be updated.

[0213] 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. In this case, if the connected NZP CSI-RS resource is a non-periodic NZP CSI-RS resource, the existence of the connected NZP CSI-RS is indicated if the value of the SRS request field in DCI format 0_1 ​​or 1_1 is not '00'. In this case, the corresponding DCI must not indicate cross-carrier or cross-BWP scheduling. Additionally, if the value of the SRS request indicates the existence of the NZP CSI-RS, the NZP CSI-RS is located in the slot where the PDCCH containing the SRS request field was transmitted. In this case, the TCI states set on the scheduled subcarrier are not set to QCL-TypeD.

[0214] If a periodic or semi-persistent SRS resource set is established, the associated NZP CSI-RS can be indicated via the associated CSI-RS within the parent signaling SRS-ResourceSet. For non-codebook-based transmissions, the terminal does not expect the parent signaling spatialRelationInfo for the SRS resource and the associated CSI-RS within the parent signaling SRS-ResourceSet to be established together.

[0215] When a terminal is configured with multiple SRS resources, it can determine the precoder and transmission rank to be applied to PUSCH transmission based on the SRI indicated by the base station. In this case, the SRI can be indicated via the field SRS resource indicator within the DCI or configured via the higher-level signaling srs-ResourceIndicator. Similar to the codebook-based PUSCH transmission described above, when the terminal receives the SRI via the DCI, the SRS resource indicated by the SRI refers to the SRS resource corresponding to the SRI among the SRS resources transmitted prior to the PDCCH containing the SRI. The terminal may use one or multiple SRS resources for SRS transmission, and the maximum number of SRS resources that can be transmitted simultaneously within the same symbol in a single SRS resource set, as well as the maximum number of SRS resources, are determined by the UE capability reported by the terminal to the base station. In this case, the SRS resources transmitted simultaneously by the terminal occupy the same RB. The terminal configures one SRS port for each SRS resource. Only one SRS resource set can be configured with the usage value in the upper signaling SRS-ResourceSet set set to 'nonCodebook', and up to four SRS resources can be configured for non-codebook-based PUSCH transmission.

[0216] 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 results measured upon receiving the NZP-CSI-RS. When the terminal transmits one or more SRS resources within an SRS resource set where usage is set to 'nonCodebook' to the base station, it applies the calculated precoder, and the base station selects one or more SRS resources from among the received one or more SRS resources. At this time, in non-codebook-based PUSCH transmission, the SRI represents an index capable of expressing a combination of one or more SRS resources, and the SRI is included within the DCI. At this time, the number of SRS resources indicated by the SRI transmitted by the base station may be the number of transmission layers of the PUSCH, and the terminal transmits the PUSCH by applying the precoder applied for SRS resource transmission to each layer.

[0217] [CA / DC Related]

[0218] FIG. 10 is a diagram illustrating the wireless protocol structure of a base station and a terminal in a single cell, carrier aggregation, dual connectivity situation according to one embodiment of the present disclosure.

[0219] Referring to FIG. 10, the wireless protocol of the next-generation mobile communication system consists of NR SDAP (Service Data Adaptation Protocol S25, S70), NR PDCP (Packet Data Convergence Protocol S30, S65), NR RLC (Radio Link Control S35, S60), and NR MAC (Medium Access Control S40, S55) at the terminal and the NR base station, respectively.

[0220] The main functions of NR SDAP (S25, S70) may include some of the following functions.

[0221] - User data transfer function (transfer of user plane data)

[0222] - Mapping function between a QoS flow and a DRB for both DL and UL for uplink and downlink

[0223] - Marking QoS flow ID for uplink and downlink (marking QoS flow ID in both DL and UL packets)

[0224] - Function to map reflective QoS flow to data bearers for uplink SDAP PDUs (reflective QoS flow to DRB mapping for the UL SDAP PDUs).

[0225] Regarding the above SDAP layer device, the terminal may receive a setting via an RRC message indicating whether to use the header of the SDAP layer device or the functions of the SDAP layer device for each PDCP layer device, bearer, or logical channel. If the SDAP header is configured, the terminal may be instructed to update or reset the mapping information for the uplink and downlink QoS flows and data bearers to the NAS reflective QoS and AS reflective QoS 1-bit indicators of the SDAP header. The above SDAP header may include QoS flow ID information indicating QoS. The above QoS information may be used for data processing priority, scheduling information, etc., to support smooth service.

[0226] The main functions of NR PDCP (S30, S65) may include some of the following functions.

[0227] - Header compression and decompression features (ROHC only)

[0228] - User data transfer function (Transfer of user data)

[0229] - Sequential delivery function (In-sequence delivery of upper layer PDUs)

[0230] - Out-of-sequence delivery of upper layer PDUs

[0231] - Reordering function (PDCP PDU reordering for reception)

[0232] - Duplicate detection function (Duplicate detection of lower layer SDUs)

[0233] - Retransmission of PDCP SDUs

[0234] - Encryption and decryption functions (Ciphering and deciphering)

[0235] - Timer-based SDU discard in uplink.

[0236] In the above, the reordering function of the NR PDCP device refers to a function that reorders PDCP PDUs received from a lower layer in order based on the PDCP SN (sequence number), and may include a function that transmits data to an upper layer in the reordered order. Alternatively, the reordering function of the NR PDCP device may include a function that transmits immediately without considering the order, a function that records lost PDCP PDUs by reordering, a function that reports the status of lost PDCP PDUs to the transmitting side, and a function that requests retransmission of lost PDCP PDUs.

[0237] The main functions of NR RLC(S35, S60) may include some of the following functions.

[0238] - Data transfer function (Transfer of upper layer PDUs)

[0239] - Sequential delivery function (In-sequence delivery of upper layer PDUs)

[0240] - Out-of-sequence delivery of upper layer PDUs

[0241] - ARQ function (Error Correction through ARQ)

[0242] - Concatenation, segmentation, and reassembly functions of RLC SDUs

[0243] - Re-segmentation function (Re-segmentation of RLC data PDUs)

[0244] - Reordering function (Reordering of RLC data PDUs)

[0245] - Duplicate detection

[0246] - Error detection function (Protocol error detection)

[0247] - RLC SDU discard function

[0248] RLC re-establishment function

[0249] In the above, the in-sequence delivery function of the NR RLC device refers to the function of delivering RLC SDUs received from a lower layer to an upper layer in order. The in-sequence delivery function of the NR RLC device may include a function of reassembling and delivering the RLC SDUs when the original RLC SDU is received divided into multiple RLC SDUs, a function of rearranging the received RLC PDUs based on an RLC SN (sequence number) or PDCP SN (sequence number), a function of recording lost RLC PDUs by rearranging the order, a function of reporting the status of lost RLC PDUs to the transmitting side, and a function of requesting retransmission of lost RLC PDUs. The in-sequence delivery function of the NR RLC device may include a function to deliver only the RLC SDUs prior to the lost RLC SDU in order to the upper layer if there is a lost RLC SDU, or a function to deliver all RLC SDUs received before the timer started in order to the upper layer if a predetermined timer has expired even if there is a lost RLC SDU. Alternatively, the in-sequence delivery function of the NR RLC device may include a function to deliver all RLC SDUs received up to the present in order to the upper layer if a predetermined timer has expired even if there is a lost RLC SDU.In addition, the RLC PDUs described above may be processed in the order they are received (regardless of the order of sequence numbers, in the order of arrival) and delivered to the PDCP device out of order (out-of-sequence delivery). In the case of segments, segments stored in a buffer or to be received later may be received, reconstructed into a single complete RLC PDU, processed, and delivered to the PDCP device. The NR RLC layer may not include a concatenation function, and this function may be performed by the NR MAC layer or replaced by the multiplexing function of the NR MAC layer.

[0250] In the above, the out-of-sequence delivery function of the NR RLC device refers to a function of delivering RLC SDUs received from a lower layer directly to an upper layer regardless of order. It may include a function of reassembling and delivering them when a single RLC SDU is received divided into multiple RLC SDUs, and may include a function of storing the RLC SN or PDCP SN of the received RLC PDUs and sorting the order to record the lost RLC PDUs.

[0251] The NR MAC (S40, S55) can be connected to multiple NR RLC layer devices configured in a terminal, and the main functions of the NR MAC may include some of the following functions.

[0252] - Mapping function (Mapping between logical channels and transport channels)

[0253] - Multiplexing and demultiplexing functions (Multiplexing / demultiplexing of MAC SDUs)

[0254] - Scheduling information reporting function

[0255] - HARQ function (Error correction through HARQ)

[0256] - Priority handling between logical channels of one UE

[0257] - Priority handling between UEs by means of dynamic scheduling

[0258] - MBMS service identification function

[0259] - Transport format selection function

[0260] - Padding

[0261] The NR PHY layer (S45, S50) can perform the operation of channel coding and modulating upper layer data, creating OFDM symbols and transmitting them to the wireless channel, or demodulating OFDM symbols received through the wireless channel and channel decoding them to transmit them to the upper layer.

[0262] The detailed structure of the above wireless protocol structure may vary depending on the carrier (or cell) operation method. For example, when a base station transmits data to a terminal based on a single carrier (or cell), the base station and the terminal use a protocol structure having a single structure for each layer, as shown in S00. On the other hand, when a base station transmits data to a terminal based on Carrier Aggregation (CA) using multiple carriers in a single TRP, the base station and the terminal use a protocol structure that has a single structure up to the RLC, as shown in S10, but multiplexes the PHY layer through the MAC layer. As another example, when a base station transmits data to a terminal based on Dual Connectivity (DC) using multiple carriers in multiple TRPs, the base station and the terminal use a protocol structure that has a single structure up to the RLC, as shown in S20, but multiplexes the PHY layer through the MAC layer.

[0263] Referring to the descriptions regarding PDCCH and beam settings mentioned above, current Rel-15 and Rel-16 NR do not support repeated PDCCH transmission, making it difficult to achieve the required reliability in scenarios requiring high reliability, such as URLLC. The present invention provides a method for repeated PDCCH transmission through multiple transmission points (TRPs) to improve the PDCCH reception reliability of a terminal. The specific method is described in detail in the following embodiments.

[0264] Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The contents of the present disclosure are applicable to FDD and TDD systems. In the present disclosure, upper signaling (or upper layer signaling) is a signal transmission method transmitted from a base station to a terminal using a physical layer downlink data channel, or from a terminal to a base station using a physical layer uplink data channel, and may be referred to as RRC signaling, PDCP signaling, or a MAC (medium access control) control element (MAC CE).

[0265] In the present disclosure, when determining whether cooperative communication is applied, the terminal may use various methods, such as the PDCCH(s) that allocate the PDSCH to which cooperative communication is applied having a specific format, or the PDCCH(s) that allocate the PDSCH to which cooperative communication is applied including a specific indicator indicating whether cooperative communication is applied, or the PDCCH(s) that allocate the PDSCH to which cooperative communication is applied being scrambled with a specific RNTI, or assuming the application of cooperative communication in a specific section indicated to an upper layer. For convenience of explanation thereafter, the case in which the terminal receives a PDSCH to which cooperative communication is applied based on conditions similar to those above will be referred to as the NC-JT case.

[0266] In the following disclosure, determining the priority between A and B may be referred to in various ways, such as selecting the one with the higher priority according to a predetermined priority rule and performing the corresponding action, or omitting or dropping the action for the one with the lower priority.

[0267] In the following disclosure, the above examples are described through a number of embodiments, but these are not independent, and one or more embodiments may be applied simultaneously or in combination.

[0268] Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Hereinafter, a base station is an entity that performs resource allocation for terminals and may be at least one of a gNode B, gNB, eNode B, Node B, BS (Base Station), wireless access unit, base station controller, or a node on a network. A terminal may include a UE (User Equipment), MS (Mobile Station), cellular phone, smartphone, computer, or a multimedia system capable of performing communication functions. Although embodiments of the present disclosure are described below using a 5G system as an example, embodiments of the present disclosure may be applied to other communication systems having similar technical backgrounds or channel types. For example, LTE or LTE-A mobile communication and mobile communication technologies developed after 5G may be included therein. Accordingly, embodiments of the present disclosure may be applied to other communication systems with some modifications, provided that they do not deviate significantly from the scope of the present disclosure, in the judgment of a person skilled in the art. The contents of the present disclosure are applicable to FDD and TDD systems.

[0269] Furthermore, in describing the present disclosure, if it is determined that a detailed description of related functions or configurations could unnecessarily obscure the essence of the present disclosure, such detailed description is omitted. Additionally, the terms described below are defined in consideration of their functions within the present disclosure, and these definitions may vary depending on the intentions or practices of the user or operator. Therefore, their definitions should be based on the content throughout this specification.

[0270] In describing the present disclosure below, the term "upper layer signaling" may refer to a signaling corresponding to at least one or a combination of at least one of the following signalings.

[0271] - MIB (Master Information Block)

[0272] - SIB (System Information Block) or SIB

[0273] - RRC (Radio Resource Control)

[0274] - MAC (Medium Access Control) CE (Control Element)

[0275] In addition, L1 signaling may be a signaling corresponding to at least one or a combination of at least one of the following physical layer channels or signaling methods using signaling.

[0276] - PDCCH (Physical Downlink Control Channel)

[0277] - DCI (Downlink Control Information)

[0278] - Terminal-specific (UE-specific) DCI

[0279] - Group common DCI

[0280] - Common DCI

[0281] - Scheduling DCI (e.g., DCI used for the purpose of scheduling downlink or uplink data)

[0282] - Non-scheduling DCI (e.g., DCI not intended for scheduling downlink or uplink data)

[0283] - PUCCH (Physical Uplink Control Channel)

[0284] - UCI (Uplink Control Information)

[0285] In the following disclosure, determining the priority between A and B may be referred to in various ways, such as selecting the one with the higher priority according to a predetermined priority rule and performing the corresponding action, or omitting or dropping the action for the one with the lower priority.

[0286] In the following disclosure, the above examples are described through a number of embodiments, but these are not independent, and one or more embodiments may be applied simultaneously or in combination.

[0287] [Random Access procedure in SBFD]

[0288] Meanwhile, 3GPP introduced Subband Non-Overlapping Full Duplex (SBFD) as a new duplex method based on NR. SBFD is a technology that utilizes a portion of downlink resources as uplink resources in the TDD spectrum of frequencies below or above 6 GHz, thereby receiving uplink transmissions from terminals to expand the uplink coverage of the terminals by the increased uplink resources, and reducing feedback delay by receiving feedback on downlink transmissions from the terminals within the expanded uplink resources. In this disclosure, a terminal capable of receiving information from a base station regarding SBFD support and performing uplink transmissions within a portion of downlink resources may be referred to as an SBFD terminal (SBFD-capable UE) for convenience. To define the above SBFD method in the standard and for an SBFD terminal to determine whether the SBFD is supported in a specific cell (or frequency, frequency band), the following method may be considered.

[0289] First method. In addition to the existing frame structure types of unpaired spectrum (or time division duplex, TDD) or paired spectrum (or frequency division duplex, FDD), another frame structure type (e.g., frame structure type 2) may be introduced to define the above SBFD. The above frame structure type 2 may be defined as being supported at the specific frequency or frequency band, or the base station may instruct the terminal whether SBFD is supported through system information. The SBFD terminal may receive system information including whether SBFD is supported and determine whether SBFD is supported in the specific cell (or frequency, frequency band).

[0290] Second method. Without defining a new frame structure type, it may be indicated whether the SBFD is additionally supported at a specific frequency or frequency band of the existing unpaired spectrum (or TDD). In the second method, it may be defined whether the SBFD is additionally supported at a specific frequency or frequency band of the existing unpaired spectrum, or the base station may indicate to the terminal whether the SBFD is supported using system information. The SBFD terminal may receive system information including whether the SBFD is supported and determine whether the SBFD is supported in the specific cell (or frequency, frequency band).

[0291] In the first and second methods above, the information regarding SBFD support may be information indicating whether SBFD is supported indirectly by additionally setting a part of the downlink resource as an uplink resource in addition to the setting of TDD UL (uplink)-DL (downlink) resource configuration information indicating TDD downlink slot (or symbol) resources and uplink slot (or symbol) resources (e.g., SBFD resource configuration information in FIG. 12 described later), or it may be information indicating whether SBFD is supported directly.

[0292] In the present disclosure, the SBFD terminal may obtain cell synchronization by receiving a synchronization signal block during an initial cell connection for connecting to a cell (or base station). The process of obtaining cell synchronization may be the same for the SBFD terminal and the existing TDD terminal. Subsequently, the SBFD terminal may determine whether the cell supports SBFD through MIB acquisition, SIB acquisition, or a random access process.

[0293] The system information for transmitting information regarding SBFD support may be system information transmitted separately, distinguished from system information for a terminal supporting a different version of the standard within the cell (e.g., an existing TDD terminal), and the SBFD terminal may determine whether SBFD is supported by acquiring all or part of the system information transmitted separately from the system information for the existing TDD terminal. If the SBFD terminal acquires only the system information for the existing TDD terminal or acquires system information regarding SBFD non-support, the cell (or base station) may determine that it supports only TDD.

[0294] If the information regarding SBFD support is included in the system information for a terminal that supports a different version of the standard (e.g., an existing TDD terminal), the information regarding SBFD support may be inserted at the very end so as not to affect the acquisition of system information for the existing TDD terminal. If the SBFD terminal fails to acquire the information regarding SBFD support inserted at the very end, or acquires information that SBFD is not supported, the SBFD terminal may determine that the cell (or base station) supports only TDD.

[0295] If the information regarding SBFD support is included in the system information for a terminal supporting a different version of the specification (e.g., an existing TDD terminal), the information regarding SBFD support may be transmitted via a separate PDSCH so as not to affect the acquisition of system information for the existing TDD terminal. That is, a terminal that does not support SBFD may receive a first SIB (or SIB1) containing existing TDD-related system information from the first PDSCH. A terminal that supports SBFD may receive a first SIB (or SIB1) containing existing TDD-related system information from the first PDSCH and may receive a second SIB containing SBFD-related system information from the second PDSCH. Here, the first PDSCH and the second PDSCH may be scheduled as the first PDCCH and the second PDCCH, and the cyclic redundancy code (CRC) of the first PDCCH and the second PDCCH may be scrambled with the same RNTI (e.g., SI-RNTI). The search space for monitoring the second PDCCH can be obtained from the system information of the first PDSCH, and if it cannot be obtained (i.e., if the system information of the first PDSCH does not include information about the search space), the second PDCCH can be received in the same search space as the search space of the first PDCCH.

[0296] As described above, if the SBFD terminal determines that the cell (or base station) supports only TDD, the SBFD terminal can perform random access procedures and transmit / receive data / control signals in the same way as an existing TDD terminal.

[0297] A base station may configure separate random access resources for each of the existing TDD terminals or SBFD terminals (e.g., an SBFD terminal supporting duplex communication and an SBFD terminal supporting half-duplex communication), and transmit configuration information for said random access resources (control information or configuration information indicating time-frequency resources that can be used for PRACH) to the SBFD terminals through system information. The system information for transmitting information about said random access resources may be system information transmitted separately, distinct from system information for terminals supporting different versions of specifications within the cell (e.g., existing TDD terminals).

[0298] The base station may set up random access resources for TDD terminals and additionally set up separate random access resources for SBFD terminals. Here, the SBFD terminal may use the random access resources for TDD terminals, or the SBFD terminal may not use the random access resources for TDD terminals. In the latter case, the SBFD terminal can always use only the separate random access resources for SBFD terminals.

[0299] An SBFD terminal may be instructed by the base station on whether it can use random access resources for a TDD terminal. This may be indicated by being included in the SIB. That is, a separate random access resource for the SBFD terminal may be configured in the SIB, and along with said configuration, whether the SBFD terminal can use random access resources for a TDD terminal may be indicated. This may be indicated by 1 bit. If the 1 bit is '0' (or FALSE), the SBFD terminal cannot use random access resources for a TDD terminal. If the 1 bit is '1' (or TRUE), the SBFD terminal can use random access resources for a TDD terminal.

[0300] A base station can determine the type of terminal attempting to connect to a cell based on the random access resources used by the terminal. For example, an SBFD terminal may transmit a PRACH through a separate random access resource for the SBFD terminal, and upon receiving the PRACH, the base station may determine that the SBFD terminal is attempting to connect to a cell. For example, a TDD terminal may transmit a PRACH through a random access resource for the TDD terminal, and upon receiving the PRACH, the base station may determine that the TDD terminal is attempting to connect to a cell. For reference, if the transmission of a PRACH by an SBFD terminal through the random access resource of a TDD terminal is allowed, the base station may be ambiguous as to whether the type of terminal transmitting the PRACH is a TDD terminal or an SBFD terminal. In this case, the base station may always assume that the type of the terminal is a TDD terminal.

[0301] When a base station determines that a terminal is an SBFD terminal, the base station may schedule msg2, msg3, msg4, etc. to the terminal based on uplink subband settings. That is, when the base station schedules the reception of msg2 and msg4 to the terminal, said msg2 and msg4 may be scheduled so that they are not received in the uplink subband. When the terminal receives a PDSCH including said msg2 and msg4, it may receive the PDSCH in a frequency resource excluding the uplink subband. When the base station schedules a msg3 PUSCH to the terminal, said msg3 PUSCH may be scheduled to be transmitted within the uplink subband.

[0302] When a base station determines that a terminal is a TDD terminal, the base station cannot use uplink subband settings when scheduling msg2, msg3, and msg4 to the terminal. That is, even if an uplink subband is set in a downlink symbol or a flexible symbol, the base station can assume that the terminal cannot obtain the uplink subband setting information. When the base station schedules msg3 PUSCH to the terminal, msg3 PUSCH can be scheduled in a flexible symbol or an uplink symbol. In other words, msg3 PUSCH cannot be scheduled in an uplink subband.

[0303] Alternatively, the base station may not set a separate random access resource for the SBFD terminal, but may set a common random access resource for all terminals within the cell. In this case, configuration information regarding the random access resource may be transmitted to all terminals within the cell via system information, and the SBFD terminal that receives the system information may perform random access to the random access resource. Afterward, the SBFD terminal may complete the random access process and proceed to an RRC connection mode to transmit and receive data with the cell. After the RRC connection mode, the SBFD terminal may receive an upper or physical signal from the base station that determines that a portion of the frequency resources of the downlink time resources is set as an uplink resource, and may transmit an uplink signal from the uplink resource as an SBFD operation.

[0304] When the SBFD terminal determines that the cell supports SBFD, it can notify the base station that the terminal attempting to connect is an SBFD terminal by transmitting capability information to the base station that includes at least one of the following: whether the terminal supports SBFD, whether it supports full-duplex or half-duplex communication, and the number of transmitting or receiving antennas it has (or supports). Alternatively, if half-duplex communication support is a mandatory implementation for the SBFD terminal, the half-duplex communication support status may be omitted from the capability information. The SBFD terminal's report regarding the capability information may be reported to the base station through a random access process, after the random access process is completed, or after proceeding to an RRC connection mode for transmitting and receiving data with the cell.

[0305] The above SBFD terminal may support half-duplex communication, which performs either uplink transmission or downlink reception at a single time like an existing TDD terminal, or it may support full-duplex communication, which performs both uplink transmission and downlink reception at a single time. Accordingly, whether the above half-duplex or full-duplex communication is supported can be reported to the base station by the SBFD terminal through a capability report, and after the capability report, the base station may configure the SBFD terminal to transmit and receive using half-duplex communication or full-duplex communication. When the SBFD terminal reports the capability for half-duplex communication to the base station, a switching gap to change RF between transmission and reception may be required when operating in FDD or TDD, as a duplexer generally does not exist.

[0306] Generally, a terminal can establish a wireless link with a network through a random access procedure based on network synchronization and system information acquired during the cell search process. Random access may utilize contention-based or contention-free methods. A contention-based random access method may be used when the terminal performs cell selection and re-selection during the initial connection phase of a cell, for example, when moving from an RRC_IDLE state to an RRC_CONNECTED state. Contention-free random access may be used to reset uplink synchronization when downlink data arrives, in the case of a handover, or for location measurement.

[0307] FIG. 11 is a diagram illustrating a random access procedure in a wireless communication system to which the present disclosure applies.

[0308] Referring to FIG. 11, a contention-based random access procedure is illustrated as an example. Additionally, although not illustrated, a base station may transmit a synchronization signal block as described in the embodiments above. In this case, the base station may periodically transmit the synchronization signal block using beam sweeping. For example, the base station may transmit a synchronization signal block containing PSS / SSS (synchronization signal) and PBCH (broadcast channel) signals using up to 64 different beams for 5 ms, and multiple synchronization signal blocks may be transmitted using different beams. The terminal may detect (select) a synchronization signal block having an optimal beam direction (e.g., a beam direction where the received signal strength is strongest or greater than a predetermined threshold) and transmit a preamble using the PRACH (physical random access channel) resource associated with the detected synchronization signal block. For example, as a first step (1101) of the random access procedure, the terminal may transmit a random access preamble (or message 1) to the base station. A base station that receives the above random access preamble can measure the transmission delay value between the terminal and the base station and synchronize the uplink. Specifically, the terminal can transmit a random access preamble arbitrarily selected from a set of random access preambles given in advance by system information. Furthermore, the initial transmission power of the random access preamble can be determined based on the path loss between the base station and the terminal measured by the terminal. Additionally, the terminal can determine the transmission beam direction (or transmission beam or beam) of the random access preamble based on the synchronization signal block received from the base station and transmit the random access preamble by applying the determined transmission beam direction.

[0309] In the second step (1102), the base station may transmit a response to the detected random access attempt (random access response, RAR, or message 2 (message 2, msg2)) to the terminal. The base station may transmit an uplink transmission timing control command to the terminal based on the transmission delay value measured from the random access preamble received in the first step. Additionally, the base station may transmit uplink resource and power control commands to be used by the terminal as scheduling information. The scheduling information may include control information for the terminal's uplink transmission beam. The RAR is transmitted via PDSCH and may include at least one of the following information.

[0310] - Random access preamble sequence index detected by the network (or base station)

[0311] - TC-RNTI (temporary cell radio network temporary identifier)

[0312] - Uplink scheduling grant

[0313] - Timing advance value

[0314] If the terminal does not receive RAR, which is scheduling information for message 3, from the base station for a predetermined period of time in the second step (1102), the first step (1101) may be performed again. If the first step is performed again, the terminal increases the transmission power of the random access preamble by a predetermined step and transmits it, thereby increasing the probability of the base station receiving the random access preamble. This is called power ramping.

[0315] In the third step (1103), the terminal may transmit uplink information (scheduled transmission, or Message 3) including its terminal identifier (UE contention resolution identity) to the base station via the uplink data channel (physical uplink shared channel, PUSCH) using the uplink resources allocated in the second step (1102). If the terminal already has a valid terminal identifier (C-RNTI) within the cell before the random access procedure begins, the terminal may transmit the valid terminal identifier (C-RNTI). The PUSCH may be referred to as Message 3 PUSCH (msg3 PUSCH). The transmission timing of the uplink data channel for transmitting Message 3 may follow the uplink transmission timing control command received from the base station in the second step (1102). Additionally, the transmission power of the uplink data channel for transmitting Message 3 may be determined by considering the power control command received from the base station in the second step (1102) and the power ramping value of the random access preamble. There is. The uplink data channel for transmitting the above message 3 may be the first uplink data signal that the terminal transmits to the base station after the terminal transmits the random access preamble.

[0316] Finally, in the fourth step (1104), if the base station determines that the terminal has performed random access without collision with other terminals, it may transmit a message (contention resolution message: CR message, or message 4) containing the identifier of the terminal that transmitted uplink data in the third step (1103) to the terminal. In this regard, if multiple terminals receive the same TC-RNTI in the second step (1102), the multiple terminals that received the same TC-RNTI each transmit to the base station in the third step (1103) their own terminal identifier (UE contention resolution identity) in message 3, and the base station may transmit message 4 (CR message) containing the terminal identifier of one of the multiple terminals to resolve the contention. When a terminal receives a message 4 (CR message) containing its terminal identifier from a base station in step 4 (1104) (or transmits a message 3 (message 3) containing a terminal identifier (C-RNTI) in step 3 (1103) and receives terminal-specific control information containing a CRC based on the terminal identifier (C-RNTI) via PDCCH in step 4 (1104), it can determine that random access has succeeded. Therefore, among multiple terminals that have received the same TC-RNTI from a base station, a terminal that confirms that its terminal identifier is included in message 4 (CR message) can confirm that it has succeeded in the competition. Then, the terminal can transmit a HARQ-ACK / NACK indicating successful reception of the message 4 to the base station via a physical uplink control channel (PUCCH).

[0317] If the data transmitted by the terminal in the third step (1103) and the data of another terminal collide with each other, and the base station fails to receive the data signal from the terminal, the base station may not perform further data transmission to the terminal. Accordingly, if the terminal fails to receive the data transmitted from the base station in the fourth step (1104) for a certain period of time, it is determined that the random access procedure has failed, and the process may be restarted from the first step (1101).

[0318] As described above, in the first step (1101) of the random access process, the terminal can transmit a random access preamble onto PRACH. Each cell has 64 available preamble sequences, and depending on the transmission format, 4 long preamble formats and 9 short preamble formats may be used. The terminal generates 64 preamble sequences using a root sequence index and a cyclic shift value signaled as system information, and can randomly select one sequence to use as a preamble.

[0319] A base station may provide a terminal with configuration information for random access resources, such as control information (or configuration information) indicating time-frequency resources that can be used for PRACH, using at least one of SIB, upper layer signaling (RRC (Radio Resource Control) information), or DCI (Downlink Control Information). Frequency resources for PRACH transmission may indicate the starting RB point of transmission to the terminal, and the number of RBs used may be determined according to the preamble format transmitted via PRACH and the applied subcarrier interval. Time resources for PRACH transmission may be provided through a PRACH configuration index (0 to 255), such as a pre-set PRACH setting period, a subframe index containing a PRACH transmission time (PRACH occasion, which may be used interchangeably with transmission time), a start symbol, and the number of PRACH transmission times within a slot, as shown in Table 16 below. The terminal determines the validity of the PRACH transmission timestamps indicated in the PRACH configuration index and determines only the valid PRACH transmission timestamps as PRACH transmission timestamps capable of transmitting a random access preamble. Through the PRACH configuration index, the random access configuration information included in the SIB, and the index of the SSB selected by the terminal, the terminal identifies the time and frequency resources for transmitting the random access preamble and can transmit the selected sequence as a preamble to the base station.

[0320] [Table 16]

[0321]

[0322] Meanwhile, according to an embodiment of the present disclosure, an SBFD terminal determines the validity of a PRACH transmission time point through a PRACH configuration index and SBFD settings for performing PRACH transmission, and performs PRACH transmission through the PRACH transmission time point determined to be valid, and a procedure of the SBFD terminal is required when the valid PRACH transmission time point overlaps with a downlink reception.

[0323] FIG. 12 is a diagram illustrating an example of SBFD operating in the TDD band of a wireless communication system to which the present disclosure applies.

[0324] FIG. 12(a) illustrates a case where TDD is operated in a specific frequency band. In a cell operating the TDD, the base station can transmit and receive signals containing data / control information in the downlink slot (or symbol), uplink slot (or symbol) (1201), and flexible slot (or symbol) based on the configuration of TDD UL-DL resource configuration information indicating the downlink slot (or symbol) resource and uplink slot (or symbol) resource of the existing TDD terminal or SBFD terminal.

[0325] In Fig. 12, it can be assumed that the DDDSU slot format is configured according to the TDD UL-DL resource configuration information. Here, 'D' represents a slot composed entirely of downlink symbols, 'U' represents a slot composed entirely of uplink symbols (1201, 1211, 1221, 1231), and 'S' represents a slot that is neither 'D' nor 'U', i.e., a slot containing downlink symbols, uplink symbols, or flexible symbols. For convenience, it can be assumed here that S consists of 12 downlink symbols and 2 flexible symbols. Furthermore, the DDDSU slot format can be repeated according to the TDD UL-DL resource configuration information. That is, the repetition cycle of the TDD configuration is 5 slots (5ms for 15kHz SCS, 2.5ms for 30kHz SCS, etc.).

[0326] Next, FIGS. 12(b), 12(c) to 12(d) illustrate cases where SBFD is operated together with TDD in a specific frequency band.

[0327] Referring to FIG. 12(b), the terminal may be configured to set a portion of the cell's frequency band as a frequency band (1210) capable of uplink transmission. This band may be called an uplink subband (UL subband). The uplink subband (UL subband) may be applied to all symbols of all slots. The terminal may transmit an uplink channel or signal scheduled to all symbols (1212) within the subband (UL subband). However, the terminal may not transmit an uplink channel or signal in a band other than the subband (UL subband).

[0328] Referring to FIG. 12(c), the terminal can be configured to set a portion of the cell's frequency band as a frequency band (1220) capable of uplink transmission, and can be configured to set a time range in which the frequency band is activated. Here, this frequency band can be called an uplink subband (UL subband). In FIG. 12(c), the uplink subband (UL subband) is deactivated in the first slot, and the uplink subband (UL subband) can be activated in the remaining slots. Therefore, the terminal can transmit an uplink channel or signal in the uplink subband (UL subband) (1222) of the remaining slots. Thus, although the uplink subband (UL subband) is activated on a slot basis here, the activation status can be configured on a symbol basis.

[0329] Referring to FIG. 12(d), the terminal may be configured with a time-frequency resource capable of uplink transmission. The terminal may be configured with one or more time-frequency resources capable of uplink transmission. For example, a portion of the frequency band (1232) of the first slot and the second slot may be configured with a time-frequency resource capable of uplink transmission. Additionally, a portion of the frequency band (1233) of the third slot and a portion of the frequency band (1234) of the fourth slot may be configured with a time-frequency resource capable of uplink transmission.

[0330] In the following description, the time-frequency resources capable of uplink transmission in downlink symbols or flexible symbols may be referred to as SBFD resources / UL subbands.

[0331] [PUSCH / PUCCH Frequency Hopping]

[0332] PUSCH repetition type-A

[0333] A PUSCH may be transmitted repeatedly in multiple slots. When a PUSCH is transmitted repeatedly in multiple slots, the PUSCH transmitted in each slot may be referred to as a PUSCH repetition. A terminal may receive a setting from a base station for the number of slots in which the PUSCH is repeated, and this number may be referred to as the PUSCH repetition number. The terminal may transmit a PUSCH repetition in the slot corresponding to the PUSCH repetition number. In this case, each PUSCH repetition may contain the same transport block, and the index and length of the start symbol of each PUSCH repetition may be the same. Here, the index of the start symbol may be in ascending order according to chronological order, with the start symbol of the slot being 0. Here, the last symbol of each PUSCH repetition cannot exceed the boundaries of the slot. Here, the number of symbols included in the slot may be a fixed value. For example, the number of symbols included in the slot may be 14.

[0334] The index of the start PRB of PUSCH iterations transmitted in multiple slots can be determined by one of the following methods. The terminal may receive the index of the start PRB of the PUSCH iterations through downlink control information (DCI) or upper-layer settings (RRC signal settings) that schedule PUSCH. The index of the start PRB is RB start Let's assume that. Also, the terminal can receive the number of PRBs included in the PUSCH iterations. Let L be the number of PRBs included in the PUSCH iterations. CRB Let's assume that if frequency hopping is not configured or instructed to the terminal, the terminal RB start From PRB corresponding to L CRB The PRBs can be identified as PRBs scheduled for the PUSCH iteration. When frequency hopping is set or instructed to the terminal, the terminal RB startIt can be determined as in [Equation 2].

[0335] [Mathematical Formula 2]

[0336]

[0337] Here may be a value corresponding to the index of the slot to which the PUSCH iteration is transmitted. Here, may be the number of RBs included in the UL BWP to which PUSCH can be transmitted. Here, is an RB offset value, which may be a value indicated by the DCI scheduling the PUSCH or set by an upper-layer signal (RRC signal). Referring to [Equation 2], the index of the start PRB of the PUSCH iteration transmitted by the terminal in an even-indexed slot is And, the index of the starting PRB of the PUSCH iteration transmitting from the odd-indexed slot is It could be.

[0338] For convenience, frequency hopping consists of a first frequency hop and a second frequency hop, and the first frequency hop is It is a PUSCH repetition where PRB starts at, and the second frequency hop is It can be called a PUSCH repetition that starts with PRB. That is, in slots of even index, a PUSCH repetition is transmitted through the first frequency hop, and in slots of odd index, a PUSCH repetition is transmitted through the second frequency hop.

[0339] FIG. 13 is a drawing showing a PUSCH repetition according to one embodiment of the present disclosure.

[0340] Figure 13 illustrates an example of PUSCH iteration transmission according to [Equation 2]. As an example, 'DDDSU' can be set as the TDD setting in Figure 13. That is, among the five slots, the first three slots are downlink slots and can be composed only of downlink symbols, the last slot is an uplink slot and can be composed only of uplink symbols, and the fourth slot is a Special slot and can be composed of 12 downlink symbols and 2 flexible symbols. The slot where PUSCH iterations are transmitted may be an uplink slot. Therefore, the slot where PUSCH iterations are transmitted is n s =4, n s =9, n s =14, n s =19, … could be. More specifically, when the number of PUSCH iterations is 4, the first PUSCH iteration (1350) has an index n s It is transmitted in the slot with =4, and the second PUSCH iteration (1351) has an index of n s It is transmitted in the slot with =9, and the third PUSCH iteration (1352) has an index of n s It is transmitted in the slot with =14, and the fourth PUSCH iteration (1353) has an index of n s = Can be transmitted in a 19-person slot.

[0341] Referring to FIG. 13 and [Equation 2], the index is n s The first PUSCH iteration (1350) transmitted in the slot with 4 and an index of n s The index (1300) of the starting PRB of the third PUSCH iteration (1352) transmitted in the slot of =14 is RB start It can be the same as, and the index is n s The second PUSCH iteration (1351) transmitted in the slot with =9 and index n s The index (1310) of the starting PRB of the fourth PUSCH iteration (1353) transmitted in the slot of =19 is It can be the same as.

[0342] The terminal can be configured with an uplink subband capable of uplink transmission in downlink symbols or flexible symbols configured by TDD settings. The terminal can transmit an uplink channel (PUCCH or PUSCH) in the uplink subband. For convenience of description thereafter, the following two symbol types are defined.

[0343] - SBFD Symbol: Refers to symbols for which an uplink subband is configured. In the above SBFD symbols, the terminal can transmit an uplink channel (PUSCH or PUCCH) in the uplink subband. An uplink channel (PUSCH or PUCCH) cannot be transmitted in frequency resources other than the uplink subband. A slot composed of the above SBFD symbols may be called an SBFD slot.

[0344] - Non-SBFD symbols: Refers to symbols for which an uplink subband is not configured. The symbols may include downlink symbols for which an uplink subband is not configured, flexible symbols for which an uplink subband is not configured, and uplink symbols. The terminal may transmit an uplink channel (PUCCH to PUSCH) through PRBs included in the UL BWP in flexible symbols for which an uplink subband is not configured or in uplink symbols.

[0345] For convenience in this disclosure, it is assumed that the uplink subband is included in the UL BWP. If only some PRBs among the uplink subbands configured by the terminal from the base station are included in the UL BWP, said some PRBs are called the uplink subband. The number of PRBs included in the uplink subband may be less than or equal to the number of PRBs included in the UL BWP.

[0346] The terminal may be instructed to set one of the following two settings.

[0347] - In the first configuration, the terminal may transmit PUSCH repetitions in only one symbol type. More specifically, according to the first configuration, the symbols transmitted in the PUSCH repetitions may all be SBFD symbols or all be non-SBFD symbols. However, some of the PUSCH repetitions cannot be SBFD symbols and some of the PUSCH repetitions cannot be non-SBFD symbols.

[0348] - In the second configuration, the terminal can transmit PUSCH repetitions in two symbol types. More specifically, according to the second configuration, some of the PUSCH repetitions may be SBFD symbols and some of the PUSCH repetitions may be non-SBFD symbols.

[0349] For reference, if one PUSCH repetition overlaps with two symbol types in the first or second setting, the terminal may not transmit the PUSCH repetition.

[0350] FIG. 14 is a diagram illustrating a method of transmitting PUSCH iterations to SBFD symbols according to one embodiment of the present disclosure.

[0351] Specifically, FIG. 14 illustrates an example where a terminal transmits PUSCH repetitions to SBFD symbols with a first configuration. More specifically, the terminal may be configured with 'DDDSU' in the TDD configuration. Additionally, an uplink subband may be configured for the symbols included in the third slot among the five slots. That is, the slot index is n s Slots with =2, 7, 12, 17… can be composed of SBFD symbols. The terminal can transmit PUSCH repetitions in SBFD symbols according to the first configuration. More specifically, when the number of PUSCH repetitions is 4, the first PUSCH repetition (1450) has an index n s It is transmitted in the slot with =2, and the second PUSCH iteration (1451) has an index of n sIt is transmitted in the slot with =7, and the third PUSCH iteration (1452) has an index of n s It is transmitted in the slot with =12, and the fourth PUSCH iteration (1453) has an index of n s = Can be transmitted in a 17-slot.

[0352] As shown in FIG. 13 and [Equation 2], the terminal with frequency hopping configured has the index of the slot of the PUSCH repetition ( The index of the starting PRB can be determined based on ). For example, if the slot index is even, If can be determined as the starting PRB of the PUSCH iteration and the slot index is odd, f( ) can be determined as the starting PRB of the PUSCH iteration. Here, f( ) can be a frequency hopping function. That is, the starting PRB index of the PUSCH repetitions transmitted in the SBFD symbol can be as in [Equation 3].

[0353] [Mathematical Formula 3]

[0354]

[0355] Here, the frequency hopping function f( ) can be one of [Equation 4], [Equation 5] to [Equation 6].

[0356] [Mathematical Formula 4]

[0357]

[0358] [Mathematical Formula 5]

[0359]

[0360] [Mathematical Formula 6]

[0361]

[0362] Here is the RB offset value of the SBFD symbol, which may be a value indicated by the DCI scheduling PUSCH or set by an upper layer signal (RRC signal). may be the index of the PRB where the uplink subband starts. Here, the PRB with index 0 (PRB 0) may be the lowest PRB on the frequency axis among the PRBs included in the UL BWP. For convenience of description, the present disclosure uses [Equation 4] as the frequency hopping function, but [Equations 5] to [Equation 6] may be used.

[0363] Referring to FIG. 14 and [Equation 3] and [Equation 4], the index is n s The first PUSCH iteration (1450) transmitted in the slot with =2 and index n s The index (1400) of the starting PRB of the third PUSCH iteration (1452) transmitted in the slot of =12 is It can be the same as, and the index is n s The second PUSCH iteration (1451) transmitted in the slot with =7 and index n s The index (1410) of the starting PRB of the fourth PUSCH iteration (1453) transmitted in the slot of =17 is It can be the same as.

[0364] For convenience, frequency hopping consists of a first frequency hop and a second frequency hop, and the first frequency hop is It is a PUSCH repetition where PRB starts at, and the second frequency hop is It can be called a PUSCH repetition that starts with PRB. That is, in slots of even index, a PUSCH repetition is transmitted through the first frequency hop, and in slots of odd index, a PUSCH repetition is transmitted through the second frequency hop.

[0365] In the present disclosure, the terminal It can be obtained by at least one of the following methods.

[0366] In the first method, It can be. That is, the terminal It can be obtained through the DCI or upper-layer signal (RRC signal) that schedules PUSCH, and the same value It can be used as. Here, using the RBs to be included in the UL BWP You can obtain.

[0367] By the second method, It can be determined as. That is, the terminal It can be obtained through the DCI or upper-layer signal (RRC signal) that schedules PUSCH, and at the same value The value added It can be used as. Here It can be obtained through the DCI or upper-layer signal (RRC signal) that schedules PUSCH. Or, may be a value determined based on the uplink subband. For example, It could be.

[0368] In the third method, It can be determined as. That is, the terminal It can be obtained through the DCI or upper-layer signal (RRC signal) that schedules PUSCH, and a modulo operation is applied to the same value and The value added It can be used as. Here, the modulo operation is “ It could be. Here It can be obtained through the DCI or upper-layer signal (RRC signal) that schedules PUSCH. Or, may be a value determined based on the uplink subband. For example, It could be.

[0369] By the fourth method, It can be determined as. That is, the terminal It can be obtained through the DCI or upper-layer signal (RRC signal) that schedules PUSCH, and a modulo operation is applied to the same value and The value added It can be used as. Here, the modulo operation is “ It could be. Here It can be obtained through the DCI or upper-layer signal (RRC signal) that schedules PUSCH. Or, may be a value determined based on the uplink subband. For example, It could be.

[0370] For convenience, the present disclosure is based on the first method, but the embodiments of the present disclosure can be equally applied to other methods, for example, the second to fourth methods.

[0371] FIG. 15 is a diagram illustrating a method of transmitting PUSCH iterations to SBFD symbols and Non-SBFD symbols according to one embodiment of the present disclosure.

[0372] Specifically, FIG. 15 illustrates an example where a terminal transmits PUSCH repetitions to SBFD symbols and Non-SBFD symbols with a second setting. More specifically, the terminal may be configured with 'DDDSU' in the TDD setting. Additionally, an uplink subband may be configured for the symbols included in the third slot among the five slots. That is, the slot index is n s Slots with =2, 7, 12, 17… can be composed of SBFD symbols. The index of the slot is n s Slots with =4, 9, 14, and 19 can be composed of uplink symbols. The terminal can transmit PUSCH repetitions in SBFD symbols and non-SBFD symbols according to the second configuration. More specifically, when the number of PUSCH repetitions is 4, the first PUSCH repetition (1550) has an index n sIt is transmitted in slot =2, and the second PUSCH iteration (1551) has an index of n s It is transmitted in slot 4, and the third PUSCH iteration (1552) has an index n s It is transmitted in the slot with =7, and the fourth PUSCH iteration (1553) has an index of n s = Can be transmitted in a 9-person slot.

[0373] Referring to FIG. 15, [Equation 2] and [Equation 3], the index is n s The first PUSCH iteration (1550) transmitted in the slot with =2 and index n s The index (1500) of the starting PRB of the second PUSCH repetition (1551) transmitted in the slot of 4 is It can be the same as, and the index is n s The third PUSCH iteration (1551) transmitted in slot =7 and index n s The index (1510) of the starting PRB of the fourth PUSCH repetition (1553) transmitted in the slot of =9 is It can be the same as.

[0374] Referring to FIG. 15, the terminal can see that two adjacent PUSCH repetitions start at the same PRB. If the number of PUSCH repetitions is 2, the terminal can transmit the first PUSCH repetition (1550) and the second PUSCH repetition (1551). Since the two PUSCH repetitions start at the same PRB, the two PUSCH repetitions cannot obtain frequency diversity gain due to frequency hopping.

[0375] Methods to resolve this are disclosed.

[0376] In a first method, the terminal may change the frequency hopping index for a PUSCH repetition transmitted in SBFD symbols. More specifically, with reference to [Equation 2] and [Equation 3], if the index of the slot in which the PUSCH repetition is transmitted is even, the PUSCH repetition is transmitted at a first frequency hop, and if the index of the slot in which the PUSCH repetition is transmitted is odd, the PUSCH repetition is transmitted at a second frequency hop. According to the present disclosure, when a PUSCH repetition is transmitted in SBFD symbols, if the index of the slot in which the PUSCH repetition is transmitted is odd, the PUSCH repetition is transmitted at a first frequency hop, and if the index of the slot in which the PUSCH repetition is transmitted is even, the PUSCH repetition may be transmitted at a second frequency hop. That is, the frequency hops can be selected differently depending on whether the PUSCH repetition is transmitted in a non-SBFD symbol or in an SBFD symbol. [Equation 7] is a formula for determining the frequency hopping of a PUSCH transmitted in an SBFD symbol according to the present disclosure.

[0377] [Mathematical Formula 7]

[0378]

[0379] When compared with [Equation 3], the index of the slot where the PUSCH repetition is transmitted If g is odd, Determine as the starting PRB of the PUSCH iteration, and the index of the slot to which the PUSCH iteration is transmitted. If is even, You can determine the starting PRB of the PUSCH iteration.

[0380] FIG. 16 is a drawing illustrating a method for transmitting PUSCH repetitions according to one embodiment of the present disclosure.

[0381] Specifically, FIG. 16 illustrates an example of PUSCH repeat transmission according to [Equation 7]. The second PUSCH repeat (1651) and the fourth PUSCH repeat (1653) transmitted in a non-SBFD symbol can be transmitted at the first frequency hop if the index of the slot where the PUSCH repeat is transmitted is even, as in [Equation 2], and at the second frequency hop if the index of the slot where the PUSCH repeat is transmitted is odd. That is, the index of the slot where the second PUSCH repeat (1651) is transmitted is n s Since = 4 (an even number), it is transmitted at the first frequency hop, and the index of the slot where the fourth PUSCH repetition (1653) is transmitted is n. s Since =9 (odd), it can be transmitted at the second frequency hop. The first PUSCH repetition (1650) and the third PUSCH repetition (1652) transmitted in the SBFD symbol can be transmitted at the first frequency hop if the index of the slot where the PUSCH repetition is transmitted is odd, as in [Equation 7], and at the second frequency hop if the index of the slot where the PUSCH repetition is transmitted is even. That is, the index of the slot where the first PUSCH repetition (1650) is transmitted is n s Since =2 (an even number), it is transmitted at the second frequency hop, and the index of the slot where the third PUSCH repetition (1652) is transmitted is n. s Since =7 (odd), it can be transmitted at the first frequency hop.

[0382] Here, the first frequency hop is a frequency hop where the starting PRB of the PUSCH repetition is (1600), and the second frequency hop may be a frequency hop where the starting PRB of the PUSCH repetition is (1610).

[0383] Referring to FIG. 16, when the terminal is instructed to have 2 PUSCH repetitions, the terminal can transmit the first PUSCH repetition (1650) at the second frequency hop and the second PUSCH repetition (1651) at the first frequency hop. Thus, the terminal can obtain frequency diversity using the two PUSCH repetitions.

[0384] In the second method, the terminal may selectively use [Equation 3] to [Equation 7] depending on the condition. Here, the condition may be at least one of the following.

[0385] - As a first condition, [Equation 3] to [Equation 7] may be optionally used for the index of the SBFD slot determined according to the SBFD setting based on the TDD setting. For example, if the index of the first SBFD slot is odd, [Equation 3] may be used, and if the index of the first SBFD slot is even, [Equation 7] may be used. For example, if the index of the slot containing the first SBFD symbol is odd, [Equation 3] may be used, and if the index of the slot containing the first SBFD symbol is even, [Equation 7] may be used. For reference, if N slots are included in the TDD setting, the index of the slot that is earliest in time among the N slots is set to 0, and the slot indices may be increased by 1 in ascending order of time.

[0386] - As a second condition, [Equation 3] through [Equation 7] may be optionally used based on the index of the slot to which a specific PUSCH iteration is scheduled. For example, if the index of the slot to which a specific PUSCH iteration is scheduled is odd, [Equation 3] may be used, and if the index of the slot to which a specific PUSCH iteration is scheduled is even, [Equation 7] may be used. Here, the specific PUSCH iteration may be the first PUSCH iteration that is the earliest in time among the PUSCH iterations. Here, the specific PUSCH iteration may be the first PUSCH iteration that is the earliest in time among the PUSCH iterations scheduled on the SBFD symbols.

[0387] - As a third condition, [Equation 3] through [Equation 7] may be optionally used based on the number of SBFD slots determined by the SBFD settings configured based on the TDD settings. For example, if the number of SBFD slots is 1, [Equation 7] may be used, and if the number of SBFD slots exceeds 1, [Equation 3] may be used. As another example, if the number of SBFD slots is odd, [Equation 7] may be used, and if the number of SBFD slots is even, [Equation 3] may be used. Here, an SBFD slot may be replaced with a slot containing at least one SBFD symbol.

[0388] FIG. 17 is a diagram illustrating an SBFD configuration according to an embodiment of the present disclosure. More specifically, the terminal may be configured as 'DDDSU' with a TDD configuration. Additionally, an uplink subband may be configured for the symbols included in the second slot among the five slots. That is, the slot index is n sSlots with =1, 6, 11, 16… can be composed of SBFD symbols. The terminal can transmit PUSCH repetitions in SBFD symbols and non-SBFD symbols according to the second configuration. More specifically, when the number of PUSCH repetitions is 4, the first PUSCH repetition (1750) has an index n s It is transmitted in the slot with =1, and the second PUSCH iteration (1751) has an index of n s It is transmitted in slot 4, and the third PUSCH iteration (1752) has an index n s It is transmitted in the slot with =6, and the fourth PUSCH iteration (1753) has an index of n s = Can be transmitted in a 9-person slot.

[0389] Based on the first condition described above (optional use of [Equation 3] to [Equation 7] for the index of the SBFD slot determined according to the SBFD setting based on the TDD setting), the index of the start of the PRB where the PUSCH iteration begins can be determined as in [Equation 8].

[0390] [Mathematical Formula 8]

[0391]

[0392] Here may be the index of the first SBFD slot according to the first condition. According to FIG. 17, Since =1, [Equation 8] can be equal to [Equation 3].

[0393] Referring to FIG. 17 and [Equation 8], the slot index of the first PUSCH repetition (1750) transmitted from the SBFD symbol is 1 (odd), so it can be transmitted at the second frequency hop, and the slot index of the third PUSCH repetition (1752) transmitted from the SBFD symbol is 6 (even), so it can be transmitted at the first frequency hop. The slot index of the second PUSCH repetition (1751) transmitted from the Non-SBFD symbol is 4 (even), so it can be transmitted at the first frequency hop, and the slot index of the fourth PUSCH repetition (1753) transmitted from the Non-SBFD symbol is 9 (odd), so it can be transmitted at the second frequency hop.

[0394] In a third method, the terminal can change the frequency hop for each slot included in the TDD configuration. More specifically, with reference to FIGS. 16 and 17, the second PUSCH repetition (1651, 1751) and the third PUSCH repetition (1652, 1752) transmitted by the terminal are transmitted over the same frequency hop, which may result in reduced frequency diversity. To overcome this, the frequency hop can be changed for each slot included in the TDD configuration (5 slots in FIGS. 16 and 17). More specifically, the index of the starting PRB of the PUSCH repetition transmitted in the SBFD symbol may be [Equation 9].

[0395] [Mathematical Formula 9]

[0396]

[0397] Here may be the index of the first SBFD slot according to the first condition of the second method. Here, is the number of slots configured according to the TDD configuration. For example, as shown in FIGS. 16 and 17, if the TDD configuration is set for 5 slots and the configuration is repeated, N TDD= can be 5. [Equation 9] can be applied to both SBFD symbols and non-SBFD symbols.

[0398] FIG. 18 is a drawing illustrating a method for transmitting PUSCH repetitions according to one embodiment of the present disclosure.

[0399] Specifically, FIG. 18 shows an example of a PUSCH repetition according to [Equation 9]. With reference to FIG. 18 and [Equation 9], the first PUSCH repetition (1850) transmitted in the SBFD symbol Since it is an odd number, the third PUSCH repetition (1852) transmitted at the second frequency hop and transmitted at the SBFD symbol Since it is odd, it can be transmitted at the second frequency hop. The second PUSCH repetition (1851) transmitted in a non-SBFD symbol. Since is an even number, the fourth PUSCH repetition (1853) transmitted at the first frequency hop and transmitted in a Non-SBFD symbol Since it is an even number, it can be transmitted at the first frequency hop.

[0400] The terminal can be configured to transmit PUSCH repetitions only at SBFD symbols according to the first configuration received from the base station.

[0401] FIG. 19 is a diagram illustrating a method for transmitting PUSCH repetitions over one or more set TDD patterns according to one embodiment of the present disclosure.

[0402] Referring to FIG. 19, the terminal can be configured with TDD settings, receiving “DDDSU” as the first TDD pattern and “DDSUU” as the second TDD pattern. By combining the first TDD pattern and the second TDD pattern, a “DDDSUDDSUU” slot pattern is determined, and among the 10 slots, the first, second, third, sixth, and seventh slots are downlink slots, the fifth, ninth, and tenth slots are uplink slots, and the fourth and eighth slots may be Special slots.

[0403] The terminal can receive SBFD settings corresponding to each TDD pattern from the base station. With the first SBFD setting corresponding to the first TDD pattern “DDDSU”, an uplink subband may be set in the fourth slot (Special slot) among the five “” slots. With the second SBFD setting corresponding to the second TDD pattern “DDSUU”, an uplink subband may be set in the third slot (Special slot) among the five “” slots. According to the first SBFD setting to the second SBFD setting, uplink subbands may be set in the fourth slot and the eighth slot among the ten “DDDSUDDSUU” slots. The terminal can transmit PUSCH repetitions in SBFD symbols. When the number of PUSCH repetitions is 4, the first PUSCH repetition (1950) has an index n s It is transmitted in the slot with =3, and the second PUSCH iteration (1951) has an index of n s It is transmitted in the slot with =7, and the third PUSCH iteration (1952) has an index of n s It is transmitted in the slot with =13, and the fourth PUSCH iteration (1953) has an index of n s = Can be transmitted in 17 slots.

[0404] According to [Equation 3], the starting PRB of the PUSCH repetition transmitted in the SBFD symbol can be obtained. All PUSCH repetitions transmitted in the SBFD symbol have odd slot indices. Therefore, they can be transmitted at the second frequency hop. In other words, according to the SBFD configuration of FIG. 19, since the indices of all SBFD slots are odd, PUSCH repetitions are not transmitted at the first frequency hop. Therefore, frequency diversity cannot be obtained through PUSCH repetition transmission.

[0405] Methods to resolve this are disclosed.

[0406] In the first method, the terminal can determine frequency hops based on the index of an SBFD slot included in the TDD pattern corresponding to the PUSCH repetition. Here, the index of the SBFD slot may be the index of the first SBFD slot in time or the index of a slot containing the first SBFD symbol in time. The index may be incremented by 1 in ascending order of time, with the first slot of the TDD pattern being 0. Through [Equation 10], the index of the starting PRB of the PUSCH repetition can be determined.

[0407] [Mathematical Formula 10]

[0408]

[0409] Here, is the index of the first SBFD slot within the corresponding TDD pattern. That is, if the PUSCH iteration is included in the first TDD pattern (“DDDSU”), (The SBFD symbol is set in the 4th slot among the DDDSU slots), and if the PUSCH repetition is included in the 2nd TDD pattern (“DDSUU”), (The SBFD symbol may be set in the 3rd slot among the DDSUU slots).

[0410] FIG. 20 is a drawing illustrating a method for transmitting PUSCH repetitions according to one embodiment of the present disclosure.

[0411] Specifically, FIG. 20 shows an example of a PUSCH repetition according to [Equation 10]. Referring to FIG. 20, the slot index of the first PUSCH repetition (2050) transmitted in the SBFD symbol is 1 (odd), corresponding to the first TDD pattern, and the corresponding Since this is 3, the slot index of the second PUSCH repetition (2051) transmitted at the second frequency hop and transmitted at the SBFD symbol is 7 (odd), corresponding to the second TDD pattern, and corresponding Since this is 2, the slot index of the third PUSCH repetition (2052) transmitted at the first frequency hop and transmitted at the SBFD symbol is 13 (odd), corresponding to the first TDD pattern, and corresponding Since this is 3, the slot index of the fourth PUSCH repetition (2053) transmitted at the second frequency hop and transmitted at the SBFD symbol is 17 (odd), corresponding to the second TDD pattern, and corresponding Since this is 2, it can be transmitted at the first frequency hop.

[0412] In the second method, the terminal can change the frequency hop corresponding to the PUSCH repetition for each TDD pattern. Through [Equation 11], the index of the starting PRB of the PUSCH repetition can be determined.

[0413] [Mathematical Formula 11]

[0414]

[0415] Here is the number of slots belonging to the TDD pattern.

[0416] In the third method, frequency hops can be determined based on the indices of PUSCH repetitions transmitted in the SBFD symbol. Through [Equation 12], the index of the start PRB of the PUSCH repetition can be determined.

[0417] [Mathematical Formula 12]

[0418]

[0419] Here is the order in which PUSCH iterations are transmitted, that is, the first PUSCH iteration is =0, the second PUSCH iteration is It can be 0. Here is the index of the PUSCH iterations transmitted in the SBFD symbols, that is, the first PUSCH iteration transmitted in the SBFD symbols is =0, the second PUSCH iteration transmitted in SBFD symbols is = can be 0. For reference, PUSCH repeats transmitted in Non-SBFD symbols may be excluded from the above indexing. For reference, PUSCH repeats transmitted in Non-SBFD symbols may be indexed separately. Therefore, the index of PUSCH repeats transmitted in Non-SBFD symbols In this case, the start PRB of the PUSCH repetition transmitted in the Non-SBFD symbol can be determined by Equation 13.

[0420] [Mathematical Formula 13]

[0421]

[0422] In the fourth method, frequency hops can be determined based on the index of the SBFD slot where PUSCH repetitions are transmitted. Through [Equation 14], the index of the starting PRB of the PUSCH repetition can be determined.

[0423] [Mathematical Formula 14]

[0424]

[0425] Here may be an index of an SBFD slot. For example, the index of SBFD slots (or slots containing at least one SBFD symbol) among the slots included in a frame (10ms), This can be assigned. The index of the earliest SBFD slot in time is 0, and the indices can be increased by 1 in ascending order of time.

[0426] FIG. 21 is a diagram illustrating a method of transmitting PUSCH iterations to SBFD symbols and Non-SBFD symbols according to one embodiment of the present disclosure.

[0427] FIG. 21 illustrates an example in which PUSCH repetitions are transmitted in SBFD symbols and non-SBFD symbols according to a second configuration. Referring to FIG. 21, in a non-SBFD symbol, a second PUSCH repetition (2151) and a fourth PUSCH repetition (2153) may be transmitted at the first frequency hop (start PRB is 2100) and the second frequency hop (start PRB is 2110). At this time, all PRBs included in the first frequency hop (start PRB is 2100) and the second frequency hop (start PRB is 2110) may be included in the UL BWP of the non-SBFD symbol. In an SBFD symbol, a third PUSCH repetition (2152) and a first PUSCH repetition (2150) may be transmitted at the first frequency hop (start PRB is 2100) and the second frequency hop (start PRB is 2110). However, some of the PRBs included in the second frequency hop (start PRB is 2110) may not be included in the uplink subband of the SBFD symbol. Therefore, the transmission capability and transmission method of the second frequency hop (start PRB is 2110) must be determined.

[0428] In the first method, the terminal does not expect the frequency hopping of the PUSCH repetition. That is, when the base station instructs or sets the frequency hopping of the PUSCH repetition to the terminal, it may ensure that all PRBs of both frequency hops are always included in the uplink subband of the SBFD symbol. If some PRBs of at least one of the two frequency hops of the PUSCH repetition are not included in the uplink subband of the SBFD symbol, the terminal may not follow the DCI scheduling the PUSCH repetition. That is, the DCI may be ignored or discarded.

[0429] In a second method, the terminal may not transmit the one frequency hop if some of the PRBs of the one frequency hop are not included in the uplink subband of the SBFD symbol. However, if all the PRBs of the other frequency hop are included in the uplink subband of the SBFD symbol, the other frequency hop may be transmitted.

[0430] In a third method, the terminal may not transmit two frequency hops if some PRBs of one frequency hop are not included in the uplink subband of the SBFD symbol. That is, even if all PRBs of another frequency hop are included in the uplink subband of the SBFD symbol, the other frequency hop may not be transmitted.

[0431] In the fourth method, if some PRBs of one frequency hop are not included in the uplink subband of an SBFD symbol, the terminal may transmit a PUSCH repeat at another frequency hop instead of the one frequency hop. For example, if some PRBs of a second frequency hop are not included in the uplink subband of an SBFD symbol, the terminal may transmit a PUSCH repeat at the first frequency hop. That is, the PUSCH repeat may be transmitted without applying frequency hopping.

[0432] In the fifth method, if some PRBs of a single frequency hop are not included in the uplink subband of an SBFD symbol, the terminal may transmit PUSCH only from the PRBs included in the single frequency hop that are included in the uplink subband. That is, PRBs not included in the uplink subband may be excluded from PUSCH repetition.

[0433] Although the embodiments described above in this disclosure are based on PUSCH repeated transmission in a plurality of slots, they can be applied in the same way to PUCCH repeated transmission. When the embodiments described above are applied to PUCCH repetition, the start PRB of the first frequency hop in the Non-SBFD symbol and the SBFD symbol ( , ) and the start of the second frequency hop PRB ( ) can be set or directed as a higher-level signal.

[0434] Although the embodiments described above in this disclosure are based on PUSCH repeated transmission in a plurality of slots, they can be applied in the same way to Type-B PUSCH repeated transmission. When the embodiments described above are applied to Type-B PUSCH repeated transmission, the index of the slot (n) in the embodiments described above sThe description regarding ) can be applied identically by replacing it with the index of the nominal repetition. Here, the Type-B PUSCH repeat transmission method is a method in which PUSCH repeats are transmitted consecutively. More specifically, according to the Type-B PUSCH repeat transmission method, the terminal may receive instructions from the base station for the starting symbol and length of the PUSCH repeat. The terminal may determine the first nominal repetition based on the said starting symbol and length. The second nominal repetition may start at the symbol immediately following the first nominal repetition and have the same length as the first nominal repetition. The terminal may determine as many nominal repetitions as the number of instructions received. If a nominal repetition spans two slots, the nominal repetition may be divided into two actual repetitions. Here, the symbols included in one actual repetition may be the symbols included in one slot. If a nominal repetition overlaps with symbols that cannot be used for PUSCH transmission, said symbols may be excluded from the nominal repetition. And if the remaining symbols after exclusion are discontinuous, each consecutive symbol can be composed of actual repetitions.

[0435] Although the embodiments described above in this disclosure are based on repeated PUSCH transmission in a plurality of slots, the terminal may receive DMRS bundling settings from the base station. Depending on the DMRS bundling settings, N at the interval of frequency hopping FH The value can be set. The terminal is a consecutive N FH PUSCH repetitions contained in slots can be transmitted over the same frequency hop. In this case, in the above-described embodiment, the index of the slot The content explained regarding is It can be replaced with and applied in the same way.

[0436] <Frequency shift and Frequency hopping>

[0437] FIG. 24 is a flowchart illustrating the application of frequency shift and frequency hopping according to one embodiment of the present disclosure.

[0438] In subsequent initiation, Frequency shift refers to a shift along the frequency axis between a PUSCH scheduled in an active UL BWP in a non-SBFD symbol and a PUSCH scheduled in an UL subband in an SBFD symbol. For example, assuming that the UL BWP contains PRB#0 to PRB#272 and the UL subband is set to PRB#100 to PRB#149, among the repeated transmissions of a PUSCH (or CG PUSCH, or PUSCHs scheduled by multi-PUSCH scheduling), a first PUSCH repetition may be transmitted in non-SBFD symbols and a second PUSCH repetition may be transmitted in an SBFD symbol. Here, the first PUSCH repetition may start in a first PRB. Here, the first PRB may be located within the UL BWP but may not be located within the UL subband. For example, if the first PRB is a value among PRB#0~PRB#99 or PRB#150~PRB#272, the first PRB may be included in the UL BWP but may not be included in the UL subband. Alternatively, the first PRB, which is the starting position, may be located within the UL subband, but some of the PRBs of the PUSCH scheduled from the first PRB may not be located within the UL subband. The terminal may move the first PRB into the UL subband. This is referred to as frequency shift.

[0439] Frequency shift can be used for a different purpose than frequency hopping. Frequency hopping aims to achieve frequency diversity by transmitting the first hop and the second hop at different frequencies. However, as mentioned above, the purpose of frequency shift can be to move the PUSCH so that it is located within the UL subband.

[0440] The present disclosure discloses a method in which a terminal simultaneously applies frequency shift and frequency hopping. For convenience, the following description is based on repeated PUSCH transmission, but embodiments of the present disclosure can be applied to PUSCHs scheduled by CG PUSCH to multi-PUSCH scheduling.

[0441] [Method 1: Apply frequency hopping after applying frequency shift]

[0442] In one method of the present disclosure, the terminal may determine the index of the start PRB by applying frequency shifting first and frequency hopping later.

[0443] Referring to the flowchart of FIG. 24, the method by which a terminal in the present disclosure applies frequency shift and frequency hopping can be determined according to the following sequence.

[0444] In the first step (2400), the terminal can receive configuration information related to PUSCH from the base station. The configuration information related to PUSCH may include at least one of the following.

[0445] - SBFD time / frequency setting information: The terminal can determine which of the OFDM symbols is an SBFD symbol based on the SBFD time / frequency setting information. Symbols that are not SBFD symbols may be non-SBFD symbols. In the frequency domain of an SBFD symbol, DL subbands or UL subbands may be set. For reference, the terminal may refer to PRBs included in an active UL BWP among the PRBs set to the UL subband as UL usable PRBs. For convenience, in this disclosure, the UL subband may represent UL usable PRBs.

[0446] - SBFD transmission modes: A terminal may receive an SBFD transmission mode from a base station. An SBFD transmission mode may include two modes. According to the first mode, the terminal may transmit PUSCH only in one symbol type. For example, the terminal may transmit PUSCH only in non-SBFD symbols or PUSCH only in SBFD symbols. However, in the first mode, PUSCH across two symbol types (non-SBFD symbols and SBFD symbols) cannot be transmitted. According to the second mode, the terminal may transmit PUSCH across two symbol types (non-SBFD symbols and SBFD symbols). More specifically, in the case of repeated PUSCH transmission, multiple PUSCH transmission opportunities may be defined. In this case, the symbols mapped to a single PUSCH transmission opportunity may be of a single symbol type. That is, during repeated PUSCH transmission, the symbols mapped to a single PUSCH transmission opportunity may all be Non-SBFD symbols or all be SBFD symbols. And during repeated PUSCH transmissions, symbols mapped to different PUSCH transmission opportunities may be of different symbol types. That is, all symbols mapped to a specific PUSCH transmission opportunity may be Non-SBFD symbols, and all symbols mapped to another PUSCH transmission opportunity may be SBFD symbols. In the following description, the statement that PUSCH is scheduled across non-SBFD symbols and SBFD symbols refers to the case where all symbols mapped to one PUSCH transmission opportunity are Non-SBFD symbols, and all symbols mapped to another PUSCH transmission opportunity are SBFD symbols.

[0447] - Offset values ​​( ): The terminal can receive offset values ​​from the base station. The offset values ​​are offset values ​​for frequency hopping in Non-SBFD symbols ( ), offset values ​​for frequency hopping in SBFD symbols( ), offset values ​​for frequency shift( It may include at least one of the following. For reference, each offset value may be set to one or more. For example, offset values ​​for frequency hopping in non-SBFD symbols ( ) can be set to N. For example, N can be one of the values ​​1, 2, 3, or 4. In this case, the offset values ​​for frequency hopping in the SBFD symbol ( ) can be set to M values. Here, M can be equal to N or less than N. And offset values ​​for frequency shift ( ) can be set to L. Here, L can be a value equal to N or less than N.

[0448] In the second step (2410), the terminal may receive a DCI format from the base station for scheduling PUSCH transmission. Based on the DCI format, the terminal may determine the type of symbol to which PUSCH is scheduled. For example, PUSCH may be scheduled on non-SBFD symbols. For example, PUSCH may be scheduled on SBFD symbols. For example, PUSCH may be scheduled across non-SBFD symbols and SBFD symbols. The terminal may identify the PRBs to which PUSCH is scheduled through the Frequency Domain Resource Assignment (FDRA) field of the DCI format. Here, when the terminal identifies the PRBs to which PUSCH is scheduled, the FDRA field may be interpreted based on the settings of the UL BWP. That is, the terminal may interpret the FDRA field by assuming that PUSCH is scheduled on non-SBFD symbols, regardless of the type of symbol to which PUSCH is scheduled. The starting PRB index of PUSCH obtained from the FDRA field It can be said that.

[0449] More specifically, if FDRA type-0, the PRBs included in the UL BWP are grouped into a Resource block group (RBG), and the FDRA field may contain a bitmap indicating whether each RBG is scheduled. Here, the size of the RBG may be determined based on the number of PRBs included in the UL BWP.

[0450] In the case of FDRA type-1, the index of the starting PRB and the number of consecutive PRBs among the PRBs included in the UL BWP can be represented as a Resource indication value (RIV), and the RIV value can be indicated through the FDRA field.

[0451] In the third step (2420), the terminal may apply a frequency shift based on a determination of whether to apply a frequency shift. The method for making such a determination will be described later. If the terminal applies a frequency shift, the index of the starting PRB of the PUSCH corresponding to the non-SBFD symbol ( ) explained in Step 2 It can be the same as. The index of the starting PRB of PUSCH corresponding to the SBFD symbol ( ) explained in Step 2 offset value ( It can be a value to which ) has been applied. That is, the index of the starting PRB of PUSCH corresponding to the SBFD symbol is It can be expressed as follows. Here, f(x;y) may be a function for moving the starting PRB of PUSCH corresponding to the non-SBFD symbol into the UL subband (or UL usable PRBs) of the SBFD symbol. Offset value( If ) is set, apply the above single offset value to the index of the starting PRB of PUSCH ( ) can determine the offset value( If multiple ) are set, the index of the starting PRB of PUSCH( A single offset value to be applied to the decision can be indicated via the DCI format.

[0452] In step 3 (2420), depending on the determination of whether to apply frequency shift, if the terminal does not apply frequency shift, the index of the starting PRB of the PUSCH corresponding to the non-SBFD symbol ( The index of the starting PRB of PUSCH corresponding to ) and the SBFD symbol( ) explained in Step 2 It can be the same as.

[0453] In the fourth step (2430), the terminal may apply frequency hopping based on a determination of whether to apply frequency hopping. The determination method is described later. If the terminal applies frequency hopping, the index of the starting PRB of the PUSCH corresponding to the non-SBFD symbol ( ) is the first frequency hop (1 st In the case of hop) And, the second frequency hop (2 nd In the case of hop, It could be. Here is the number of PRBs included in UL BWP in non-SBFD symbols ( With a frequency hopping function defined according to ), It can be. The index of the starting PRB of PUSCH corresponding to the SBFD symbol ( ) is the first frequency hop (1 st In the case of hop) And, the second frequency hop (2 nd In the case of hop, It could be. Here is the number of PRBs included in the UL subband (or UL usable PRBs) in the SBFD symbol ( With a frequency hopping function defined according to ), It could be. Or, It could be.

[0454] Here, the offset value and offset value can be indicated via the DCI format if PUSCH is scheduled in DCI format. If multiple offset values ​​( ), or multiple offset values ​​( If ) is set, one of the plurality of offset values ​​may be indicated through the DCI format. Offset value and offset value If PUSCH is scheduled with an upper layer signal (e.g., Type-1 configured grant), it can be indicated through the upper layer signal.

[0455] In the fourth stage, the first frequency hop (1 st hop) and the second frequency hop (2 nd hop) can be determined as follows.

[0456] If intra-slot frequency hopping is set, the first frequency hop corresponds to the hop of the PUSCH transmitted first in the slot, and the second frequency hop corresponds to the hop of the PUSCH transmitted later in the slot.

[0457] If inter-slot frequency hopping is enabled and DMRS bundling is not enabled, the first frequency hop is the slot index ( ) corresponds to the PUSCH transmitted in the slot where ) is an even number, and the second frequency hop is the index of the slot ( ) can correspond to PUSCH transmitted in slots where ) is odd.

[0458] If inter-slot frequency hopping is enabled and DMRS bundling is enabled, the first frequency hop is corresponds to the PUSCH transmitted in an even slot, and the second frequency hop is g can correspond to a PUSCH transmitted in an odd slot. Here, can be the index of a slot. Here, can be a value set for the terminal that is the base station.

[0459] If inter-repetition frequency hopping is configured, the first frequency hop may correspond to a PUSCH repetition with an even number of repetitions, and the second frequency hop may correspond to a PUSCH repetition with an odd number of repetitions. Here, PUSCH is a PUSCH scheduled for PUSCH repetition Type-B transmission, and the number of repetitions may correspond to nominal repetitions. That is, the number of repetitions corresponding to the first transmitted nominal repetition is 0, the number of repetitions corresponding to the second transmitted nominal repetition is 1, and the number of repetitions corresponding to the nth nominal repetition is n-1. A nominal repetition may be divided into one or more actual repetitions. The frequency hop index of the actual repetitions may be determined based on the number of repetitions of the nominal repetitions.

[0460] In step 4 (2430), depending on the determination of whether to apply frequency hopping, if frequency hopping is not applied, the index of the starting PRB of PUSCH corresponding to the non-SBFD symbol ( ) obtained in step 3 It can be the same as. The index of the starting PRB of PUSCH corresponding to the SBFD symbol ( ) obtained in step 3 It can be like that.

[0461] In step 5 (2440), the terminal can transmit PUSCH to the base station. At this time, the starting PRB index of the PUSCH is obtained in step 4 inside It can be determined as.

[0462] Table 17 shows the indices of the starting PRB of PUSCH in non-SBFD symbols and SBFD symbols according to Method 1 of the present disclosure.

[0463] Referring to Table 17, when neither frequency shifting nor frequency hopping is applied, the index of the starting PRB of the PUSCH corresponding to the Non-SBFD symbol and the SBFD symbol is It could be.

[0464] Referring to Table 17, when frequency shifting is applied and frequency hopping is not applied, the indices of the starting PRB of the PUSCH corresponding to the Non-SBFD symbol and the SBFD symbol are, respectively , It could be.

[0465] Referring to Table 17, when frequency hopping is applied without frequency shifting, the indices of the starting PRBs for the first and second frequency hops of the PUSCH corresponding to the Non-SBFD symbol are, respectively , It may be, and the indices of the start PRBs of the first and second frequency hops of PUSCH corresponding to the SBFD symbol are, respectively , It could be.

[0466] Referring to Table 17, when both frequency shifting and frequency hopping are applied, the indices of the starting PRBs for the first and second frequency hops of the PUSCH corresponding to the Non-SBFD symbol are, respectively , It may be, and the indices of the start PRBs of the first and second frequency hops of PUSCH corresponding to the SBFD symbol are, respectively , It could be.

[0467] Referring to Table 17, when frequency shifting and frequency hopping are applied in Method 1 of the present disclosure, the index of the starting PRB of the second frequency hop in the SBFD symbol is the frequency shift function ( Frequency hopping function of ) and SBFD symbols This can be applied together. In this case, the order is the frequency shift function ( ) is applied first, and then the frequency hopping function It can be applied.

[0468] [Table 17]

[0469]

[0470] [Method 2: Simultaneous Application of Frequency Shift and Frequency Hopping]

[0471] In one method of the present disclosure, the terminal can simultaneously determine whether frequency shifting and frequency hopping are applied and the index of the start PRB based on whether they are applied.

[0472] Step 1 (2400) and Step 2 (2410) of FIG. 24 can be performed in the same way as Method 1.

[0473] In the third stage, the terminal may apply frequency shift and frequency hopping based on a determination of whether to apply frequency shift and frequency hopping. The determination method is described later.

[0474] If the terminal does not apply frequency hopping and does not apply frequency shifting, the index of the starting PRB of PUSCH in non-SBFD symbols and SBFD symbols is as described in Step 2 It can be the same as.

[0475] If the terminal applies frequency shifting instead of frequency hopping, the index of the PUSCH start PRB corresponding to the non-SBFD symbol ( )Is It can be. The index of the starting PRB of PUSCH corresponding to the SBFD symbol ( )Is It can be. Here, the offset value ( ) can be an offset value for frequency shifting of the SBFD symbol.

[0476] If the terminal applies frequency hopping but not frequency shifting, the index of the starting PRB of the PUSCH corresponding to the non-SBFD symbol ( ) is the first frequency hop (1 st In the case of hop) And, the second frequency hop (2 nd In the case of hop, It could be. Here is the number of PRBs included in UL BWP in non-SBFD symbols ( With a frequency hopping function defined according to ), It can be. Here, the offset value ( ) can be an offset value for frequency hopping of non-SBFD symbols. The index of the starting PRB of the PUSCH corresponding to the SBFD symbol ( ) is the first frequency hop (1 st In the case of hop) And, the second frequency hop (2 nd In the case of hop, It can be. Here, the offset value ( ) can be an offset value for frequency hopping of SBFD symbols.

[0477] That is, if the terminal applies frequency hopping but not frequency shift, the one obtained in Step 2 is the same frequency hopping function in non-SBFD symbols and SBFD symbols It uses, but the offset value is the value corresponding to the symbol type (for non-SBFD symbols , in the SBFD symbol The start PRB of the second frequency hop can be determined by applying ).

[0478] If the terminal applies frequency hopping and frequency shifting, the index of the PUSCH start PRB corresponding to the non-SBFD symbol ( ) is the first frequency hop (1 st In the case of hop) And, the second frequency hop (2 nd In the case of hop, It could be. Here is the number of PRBs included in UL BWP in non-SBFD symbols ( With a frequency hopping function defined according to ), It can be. The index of the starting PRB of PUSCH corresponding to the SBFD symbol ( ) is the first frequency hop (1 st In the case of hop) And, the second frequency hop (2 nd In the case of hop, It could be. Here is the number of PRBs included in the UL subband (or UL usable PRBs) in the SBFD symbol ( With a frequency hopping function defined according to ), It could be. Or, It could be.

[0479] That is, when the terminal applies frequency hopping and frequency shift, the one obtained in step 2 The frequency hopping function in the non-SBFD symbol The starting PRB of the second frequency hop can be determined by this. In the SBFD symbol, the first frequency hop is a frequency shift function The starting PRB can be determined as such, and the second frequency hop is the frequency hopping function The starting PRB can be determined as follows. That is, determining the starting PRB of the second frequency hop from the SBFD symbol. It can be a function that performs frequency shifting and frequency hopping simultaneously.

[0480] Table 18 shows the indices of the starting PRB of PUSCH in non-SBFD symbols and SBFD symbols according to Method 2 of the present disclosure.

[0481] Referring to Table 18, when frequency shifting and frequency hopping are not applied, the index of the starting PRB of the PUSCH corresponding to the Non-SBFD symbol and the SBFD symbol is It could be.

[0482] Referring to Table 18, when frequency shifting is applied and frequency hopping is not applied, the indices of the starting PRB of the PUSCH corresponding to the Non-SBFD symbol and the SBFD symbol are, respectively , It could be.

[0483] Referring to Table 18, when frequency hopping is applied without frequency shifting, the indices of the starting PRBs for the first and second frequency hops of the PUSCH corresponding to the Non-SBFD symbol are, respectively , It may be, and the indices of the start PRBs of the first and second frequency hops of PUSCH corresponding to the SBFD symbol are, respectively , It could be.

[0484] Referring to Table 18, when frequency shifting and frequency hopping are applied, the indices of the starting PRBs for the first and second frequency hops of PUSCH corresponding to the Non-SBFD symbol are, respectively , It may be, and the indices of the start PRBs of the first and second frequency hops of PUSCH corresponding to the SBFD symbol are, respectively , It could be.

[0485] In the case where frequency shifting and frequency hopping are applied in Method 2 of the present disclosure, the PRB index at the start of the second frequency hop in the SBFD symbol is or It could be.

[0486] In the case where frequency hopping is applied instead of frequency shifting in Method 2 of the present disclosure, the PRB index at the start of the second frequency hop in the SBFD symbol is It could be.

[0487] [Table 18]

[0488]

[0489] [Method for Determining Offset Value and Whether to Apply Frequency Shift and Frequency Hopping]

[0490] When the upper layer signal schedules PUSCH (Type-1 Configured Grant PUSCH), in the third step of FIG. 24, whether to apply a frequency shift and the offset for the frequency shift ( The value of ) can be indicated through the upper layer signal. In the fourth step, whether frequency hopping is applied and the offset in non-SBFD symbols ( The value of ) and the offset in the SBFD symbol( The value of ) can be indicated by the upper layer signal.

[0491] When the DCI format schedules PUSCH, the application of frequency shift and offset (in the third step of FIG. 24) The value of ) can be indicated via the DCI format. In step 4, whether frequency hopping is applied and the offset in non-SBFD symbols ( The value of ) and the offset in the SBFD symbol( The value of ) can be specified in DCI format. More specific methods may be one of the following.

[0492] The following description will use the case where the terminal is configured with both frequency shifting and frequency hopping as an example, but this does not limit the scope of the present disclosure. If the terminal is not configured with frequency shifting, the descriptions related to frequency hopping may apply, excluding the details related to frequency shifting in the following description. If the terminal is not configured with frequency hopping, the descriptions related to frequency shifting may apply, excluding the details related to frequency hopping in the following description.

[0493] In the first method, the DCI format may include a 1-bit indicating whether frequency shifting is applied and a 1-bit indicating whether frequency hopping is applied. If the 1-bit indicating whether frequency shifting is applied is '0', frequency shifting may not be applied. If the 1-bit indicating whether frequency shifting is applied is '1', frequency shifting may be applied. If the 1-bit indicating whether frequency hopping is applied is '0', frequency hopping may not be applied. If the 1-bit indicating whether frequency hopping is applied is '1', frequency hopping may be applied.

[0494] In a second method, the DCI format may include a 1-bit indicating whether frequency shifting and frequency hopping are applied simultaneously. If the 1-bit is '0', frequency shifting and frequency hopping may not be applied. If the 1-bit is '1', frequency shifting and frequency hopping may be applied.

[0495] In a third method, the DCI format may include a 1-bit indicating whether frequency hopping is applied. If the 1-bit is '0', frequency hopping may not be applied. If the 1-bit is '1', frequency hopping may be applied. Whether frequency shifting is applied can be determined based on the scheduling information of PUSCH. For example, the index of the starting PRB determined in the preceding 2nd step (2410) ( Based on ), PUSCH can determine the PRBs for which it is scheduled. If all of the above PRBs overlap with the UL subband (or UL usable PRBs), the terminal may not apply frequency shifting. This is because the PRBs for which PUSCH is scheduled are already included in the UL subband (or UL usable PRBs). If all of the above PRBs do not overlap with the UL subband (or UL usable PRBs) (if at least one PRB overlaps with a PRB other than the UL subband (or UL usable PRBs)), the terminal may apply frequency shifting. This is because the PRBs for which PUSCH is scheduled are not included in the UL subband (or UL usable PRBs).

[0496] The method for obtaining frequency shift and frequency offset values ​​is as follows.

[0497] The terminal can obtain offset values ​​corresponding to frequency shift and frequency offset as follows. For example, if frequency shift is not applied and frequency hopping is applied, the terminal obtains the offset value of frequency hopping ( , ) can be obtained from the bits of the FDRA field. Here, X bits are the offset values ​​of frequency hopping ( , ) can be indicated. For example, X bits may be the Most significant bit (MSB) bits of the FDRA field. Here, if the offset values ​​for the set frequency hopping are 2, X=1, and if the offset values ​​for the set frequency hopping are 3 or 4, X=2. Here, the offset values ​​for the set frequency hopping may be offset values ​​corresponding to non-SBFD symbols.

[0498] For example, if frequency shifting is applied and frequency hopping is not applied, the terminal has the offset value of the frequency shift ( ) can be obtained from the bits of the FDRA field. Here, the Y bits are the offset values ​​of the frequency shift ( It can indicate ). Here, if the set frequency shift offset value is 2, Y=1, and if the set frequency shift offset value is 3 or 4, Y=2.

[0499] The positions of the above Y bits may be as follows. In the case of FDRA type-1, Y bits may be obtained from the MSB of the FDRA field. In the case of FDRA type-0, the FDRA field may include a bitmap, and each bitmap may have a corresponding RGB. The terminal may obtain Y bits from the bitmap. The Y bits may be obtained from RGBs corresponding to the UL subband (or UL usable PRBs). If multiple bits correspond to the UL subband (or UL usable PRBs), the leading (MSB) Y bit may be obtained.

[0500] When frequency shifting and frequency hopping are applied, the terminal has the frequency hopping offset value ( , ) can be obtained from the bits of the FDRA field. Here, X bits are the offset values ​​of frequency hopping ( , ) can be indicated. For example, X bits may be the MSB bits of the FDRA field. Here, if there are 2 offset values ​​for the configured frequency hopping, X=1, and if there are 3 or 4 offset values ​​for the configured frequency hopping, X=2. Here, the offset values ​​for the configured frequency hopping may be offset values ​​corresponding to non-SBFD symbols. The terminal has an offset value for frequency shift ( ) can be obtained from the bits of the FDRA field. Here, the Y bits are the offset values ​​of the frequency shift ( ) can be indicated. For example, the terminal may specify an offset value of frequency shift based on Y MSB bits after the X MSB bits ( It can indicate ). Here, if the set frequency shift offset value is 2, Y=1, and if the set frequency shift offset value is 3 or 4, Y=2.

[0501] Alternatively, when frequency shifting and frequency hopping are applied, the terminal has the frequency hopping offset value ( , ) and frequency shift offset value( ) can be obtained from the bits of the FDRA field. Here, X bits are the offset values ​​of frequency hopping ( , ) and frequency shift offset value( ) can be indicated simultaneously. For example, if the value of the above X bits is 0, the offset value of the set frequency hopping ( , ) and the offset value of the set frequency shift ( The first value among ) can be indicated. If the value of the above X bits is 1, the offset value of the set frequency hopping ( , ) and the offset value of the set frequency shift ( The second value among them may be indicated. This is shown in Table 19. For example, X bits may be the MSB bits of the FDRA field.

[0502] Here, X can be determined based on the maximum value of the number of each offset value. For example, the offset value of frequency hopping for non-SBFD symbols ( ) N are set, and the offset value of frequency hopping for SBFD symbols( ) M are set, and the offset value of the frequency shift ( When L values ​​are set, X can be determined based on the maximum value max{N,M,L} among N, M, and L. Here, X can be determined as X = ceil(log2(max{N,M,L})). That is, if max{N,M,L} is 1 or 2, it is 1 bit, and if max{N,M,L} is 3 or 4, it is 2 bits.

[0503] Here, X is the offset value for frequency hopping for non-SBFD symbols ( It can be determined based on the number of ). For example, the offset value of frequency hopping for non-SBFD symbols ( ) N are set, and the offset value of frequency hopping for SBFD symbols( ) M are set, and the offset value of the frequency shift ( If L values ​​are set, X can be determined based on the maximum value N among N, M, and L. Here, X can be determined as X = ceil(log2(N)). That is, if N is 1 or 2, it can be 1 bit, and if N is 3 or 4, it can be 2 bits. Also, M and L can be less than or equal to N.

[0504] In one example of the present disclosure, if an offset value corresponding to a value indicated by X bits is not set, the terminal may determine the offset value to be '0'.

[0505] As an example of the present disclosure, the frequency hopping offset value of an SBFD symbol corresponding to a value indicated by X bits ( If ) is not set, the terminal may not apply frequency hopping of the PUSCH transmitted in the SBFD symbol.

[0506] As an example of the present disclosure, the frequency hopping offset value of a non-SBFD symbol corresponding to a value indicated by X bits ( If ) is not set, the terminal may not apply frequency hopping of PUSCH transmitted in non-SBFD symbols.

[0507] As an example of the present disclosure, a frequency shift offset value corresponding to a value indicated by X bits ( If ) is not set, the terminal may not apply frequency shifting.

[0508] As an example of the present disclosure, a frequency shift offset value corresponding to a value indicated by X bits ( If ) is not set, the terminal may use a value derived from another setting value for frequency shift. Here, the value derived from another setting value may be the index of the starting PRB of the UL subband (or UL usable PRBs). Here, the PRB with an index of 0 may be the lowest PRB on the frequency axis of the PRBs included in the UL BWP.

[0509] [Table 19]

[0510]

[0511] Function for frequency shifting ) can be at least one of the following.

[0512]

[0513] Among the above formulas silver It can be replaced with. That is, the offset value for frequency shifting can be the index of the starting PRB of the UL subband (or UL usable PRBs). For example, If this is not set, value This can be used.

[0514] FIG. 25 is a drawing illustrating a PUSCH iterative transmission with frequency shifting applied according to one embodiment of the present disclosure.

[0515] Referring to FIG. 25, the terminal can be configured to determine whether the OFDM symbol is an SBFD symbol or a non-SBFD symbol. The terminal can be configured to Point A in the frequency axis. The distance from Point A to the start frequency of the Carrier can be configured as OffsetToCarrier. The terminal can be configured to determine the Carrier Bandwidth from the start of the Carrier. Additionally, the terminal can be configured to determine the UL BWP. In FIG. 25, for convenience of explanation, it is assumed that the UL BWP is equal to the Carrier Bandwidth, but this does not limit the scope of the present disclosure. The terminal can be configured to determine the frequency position of the UL subband in the SBFD symbol. The frequency position of the UL subband indicates the distance from the start frequency of the Carrier to the start frequency position of the UL subband. Indicating the bandwidth of the UL subband It can be configured through. The terminal can determine that the PRBs of the UL subband included within the UL BWP are UL usable PRBs.

[0516] The terminal may be scheduled to receive PUSCH repeated transmissions. In the example of FIG. 25, the first iteration (Rep#0) may be located on SBFD symbols, and the second iteration (Rep#1) may be located on non-SBFD symbols. FIG. 25 shows an example where frequency shifting is applied, wherein the offset for frequency shifting is It may be. Fig. 25 shows an example where frequency hopping is not applied.

[0517] According to the flowchart of FIG. 24, the terminal can obtain the index of the PUSCH start PRB in each symbol type according to frequency shift. For example, the index of the PUSCH start PRB in the SBFD symbol is And, the index of the starting PRB of PUSCH in the non-SBFD symbol is It could be.

[0518] In order to determine the frequency shift, ; ) is the first method ( It is assumed that it is determined based on ). This is for the purpose of explaining the present disclosure, and the embodiments described below are applicable to all methods.

[0519] FIG. 26 is a diagram illustrating a Resource block group (RBG) grid in a PUSCH iterative transmission with frequency shifting applied according to one embodiment of the present disclosure.

[0520] Referring to FIG. 26, the terminal can define a common resource block (CRB) from point A. Here, the center frequency of the lowest subcarrier of CRB#0 is the same as that of point A, and the CRB may contain 12 consecutive subcarriers. The terminal can generate an RGB using the CRB. The size of the RGB (the number of CRBs included) can be determined as one of 2, 4, 6, 16, or 32 based on the base station settings or the number of PRBs included in the UL BWP. More specifically, when the size of the RGB is P, the PRBs of the UL BWP are It can be grouped into RBGs. Here, the size of the first RBG is and the size of the last RBG is The other side and otherwise it is P. The size of the other RBG is P. is the index of the starting PRB of the UL BWP. Here represents CRB#0. is the number of PRBs included in UL BWP.

[0521] The above RGB can be used in FDRA type-0. Additionally, based on the base station configuration, the above RGB can be used in FDRA type-1. That is, the terminal can receive PUSCH scheduling in RGB units in non-SBFD symbols. In non-SBFD symbols, the starting PRB of PUSCH can always be the first PRB of the RGB. This can be expressed as PUSCH being scheduled in accordance with the RGB grid. However, when frequency shifting is applied, the position of the starting PRB of PUSCH in SBFD symbols may not be the first PRB of the RGB. That is, since the starting PRB of PUSCH in SBFD symbols does not start from the first PRB of the RGB, PUSCH is scheduled not in accordance with the RGB grid. A method for scheduling PUSCH in accordance with the RGB grid in SBFD symbols is disclosed. Here, the fact that PUSCH is scheduled in accordance with the RGB grid means that the index of the PUSCH starting PRB is divided by the RGB size (P) and the remainder This may mean that. To schedule PUSCH in SBFD symbols to fit the RBG grid, one or a combination of the following methods may be applied.

[0522] In the first method, the frequency shift offset value ( ) is based on the size P of the RGB It can be changed to. For example, the offset value that the terminal uses for frequency shifting is or or It can be changed to. That is, a function for frequency shifting It can be at least as follows.

[0523]

[0524] for example, Let's say that. And P=8, Let's say. In the first method If you use it as is, It may be. Since 66 is not a multiple of 8, it may not fit in the RGB grid. If you use, And since this is a multiple of 8, it can fit into the RGB grid.

[0525] In the second method, the index of the starting PRB of PUSCH in the SBFD symbol is based on the size P of the RBG It can be changed to. If it does not match the RGB grid, the terminal It can be moved to fit the RGB grid.

[0526] For example, the terminal has the index of the PUSCH start PRB in the SBFD symbol. or or It can be decided as.

[0527] for example, Let's say that. And P=8, Let's say. In the first method It is possible. Since 66 is not a multiple of 8, it may not fit in the RGB grid. However, And since this is a multiple of 8, it can fit into the RGB grid.

[0528] As another example, the terminal is the index of the PUSCH start PRB in the SBFD symbol. or It can be decided as.

[0529] for example, Let's say that. And P=8, Let's say. In the first method It is possible. Since 67 does not have a remainder of 1 when divided by 8, it may not fit the RGB grid. However, It is possible. Since 65 does not have a remainder of 1 when divided by 8, it can fit into the RGB grid. Also, It can be. Since 73 does not have a remainder of 1 when divided by 8, it can fit into the RGB grid.

[0530] FIG. 27 illustrates a PUSCH iterative transmission with a frequency shift offset value applied to fit an RGB grid according to an embodiment of the present disclosure. Referring to FIG. 27, a terminal may receive a scheduled PUSCH iterative transmission. In the example of FIG. 27, the first iteration (Rep#0) may be located on SBFD symbols, and the second iteration (Rep#1) may be located on non-SBFD symbols. FIG. 27 shows an example with frequency shift applied.

[0531] In one embodiment, the offset for frequency shift is determined by considering the RGB size so that PUSCH in the SBFD symbols fits into the RGB grid. It could be. may be an offset value determined based on the size P of the RGB according to the first method described above to schedule PUSCH in SBFD symbols to fit the RGB grid. When the first method is applied, the index of the starting PRB of PUSCH in SBFD symbols may be determined based on methods 1-1 through 1-6.

[0532] In one embodiment, the index of the starting PRB of PUSCH in the SBFD symbol is determined by considering the RGB size so that PUSCH fits into the RGB grid in the SBFD symbols. It could be. may be a PRB index determined to schedule PUSCH in SBFD symbols to fit the RBG grid based on the size P of the RBG according to the second method described above.

[0533] <PUSCH repetition Type-B의 주파수 이동>

[0534] The terminal can receive a PUSCH scheduled according to PUSCH repetition type-B. More specifically, the terminal can determine the nominal repetition as follows based on the DCI format for scheduling PUSCH with PUSCH repetition type-B.

[0535] - The number of nominal repetitions (numberOfRepetitions) can be set from the upper layer or specified by the DCI format.

[0536] - The starting and ending symbols of the nth nominal repetition (n=0,1,…numberOfRepetitions-1) can be determined as follows.

[0537] - The nth nominal repetition is the slot index In the slot, the symbol index is Starting from the in symbol, the slot index is In the slot, the symbol index is It can terminate at the symbol. Here, K s is the index of the slot where PUSCH starts, and It can be the number of symbols included in the slot.

[0538] A nominal repetition may include one or more actual repetitions. An actual repetition may include only consecutive OFDM symbols. OFDM symbols included in a nominal repetition may be divided into actual repetitions in the following ways.

[0539] - Symbols that cannot be transmitted via PUSCH can be determined or set.

[0540] - If SBFD operation is not supported, symbols that cannot be transmitted via PUSCH may be determined or set as follows.

[0541] - For example, SSB symbols may be symbols that cannot be transmitted via PUSCH.

[0542] - In the TDD band (unpaired spectrum), symbols set as DL symbols in the TDD configuration may be symbols that cannot be transmitted via PUSCH.

[0543] - For a half-duplex UE in the FDD band (paired spectrum), SSB symbols and the period before the SSB start symbol After the previously unfinished symbols and the last symbol of the SSB These may be symbols that did not start later.

[0544] - Symbols configured to monitor the Type0 PDCCH common search space set in the TDD band may be symbols that cannot be transmitted via PUSCH.

[0545] - In the TDD band, N symbols following the last DL symbol of a sequence of DL symbols may be symbols that cannot be PUSCH transmitted. Here, N may be a value set as the upper layer signal of the base station.

[0546] - These may be symbols that cannot be transmitted via PUSCH as indicated in the DCI format.

[0547] - If SBFD operation is supported, impossible symbols may be determined or set as follows.

[0548] - If SBFD transmission mode 1 (transmission possible for only one symbol type): If the symbol corresponding to the first nominal repetition instructed by the terminal from the DCI format is an SBFD symbol, non-SBFD symbols may be symbols that cannot be PUSCH transmitted. If the symbol corresponding to the first nominal repetition instructed by the terminal from the DCI format is a non-SBFD symbol, SBFD symbols may be symbols that cannot be PUSCH transmitted. Here, if the first nominal repetition is scheduled across two symbol types, the symbols that cannot be transmitted can be determined based on the symbol type of the first symbol of the first nominal repetition. That is, if the symbol corresponding to the first symbol of the first nominal repetition is an SBFD symbol, non-SBFD symbols may be symbols that cannot be PUSCH transmitted. If the symbol corresponding to the first symbol of the first nominal repetition instructed by the terminal from the DCI format is a non-SBFD symbol, SBFD symbols may be symbols that cannot be PUSCH transmitted.

[0549] - SSB symbols may be symbols that cannot be transmitted via PUSCH. Alternatively, slots containing SSB symbols may be symbols that cannot be transmitted via PUSCH.

[0550] - Among non-SBFD symbols, DL symbols according to TDD settings may be symbols that cannot be transmitted via PUSCH.

[0551] - Symbols configured to monitor the Type0 PDCCH common search space set in the TDD band may be symbols that cannot be transmitted via PUSCH.

[0552] - Among the Non-SBFD symbols in the TDD band, N symbols following the last DL symbol of a sequence of consecutive DL symbols may be symbols that cannot be PUSCH transmitted according to the TDD configuration. Here, N may be a value set as the upper layer signal of the base station.

[0553] - These may be symbols that cannot be transmitted via PUSCH as indicated in the DCI format.

[0554] - For PUSCH repetition type-B, after determining the symbol(s) that cannot be transmitted in PUSCH repetition type-B for each K's nominal repetition, the remaining symbols can be considered as potentially valid symbols for PUSCH repetition type-B transmission. If the number of valid symbols in a nominal repetition is greater than 0, the nominal repetition may consist of one or more actual repetitions, where each actual repetition may consist of a continuous set of all potentially valid symbols that can be used for PUSCH repetition type-B transmission within the slot. If the set contains different symbol types (SBFD symbols and non-SBFD symbols), it may be divided into sets containing only continuous symbols of the same symbol type. That is, a single actual repetition may contain symbols that are continuous in the time axis and correspond to a single symbol type. An actual repetition containing a single symbol may be omitted except when L=1. The UE can repeatedly transmit TB through actual repetitions.

[0555] If inter-repetition frequency hopping is configured, the first frequency hop may correspond to a PUSCH repetition with an even number of repetitions, and the second frequency hop may correspond to a PUSCH repetition with an odd number of repetitions. Here, PUSCH is a PUSCH scheduled for type-B PUSCH repetition transmission, and the number of repetitions may correspond to nominal repetitions. That is, the number of repetitions corresponding to the first transmitted nominal repetition is 0, the number of repetitions corresponding to the second transmitted nominal repetition is 1, and the number of repetitions corresponding to the nth nominal repetition is n-1. Nominal repetitions can be divided into actual repetitions. The frequency hop index of the actual repetitions can be determined based on the number of repetitions of the nominal repetitions.

[0556] Frequency shifting may be applied to PUSCH repetition type-B transmission. In this case, the unit to which frequency shifting is applied may be determined through at least one of the following methods.

[0557] In the first method, frequency shifting can be performed in units of nominal repetition. That is, referring to the flowchart of FIG. 24, if the nominal repetition corresponds to a non-SBFD symbol in the third step (2420), the index of the starting PRB of the nominal repetition is It can be determined as follows. If the nominal repetition corresponds to an SBFD symbol, the index of the starting PRB of the said nominal repetition is It can be determined as follows. Here, the symbol type corresponding to nominal repetition can be determined by at least one of the following methods.

[0558] In the method 1-1, if at least one symbol of a nominal repetition overlaps with an SBFD symbol, the SBFD symbol may correspond to the nominal repetition. If all symbols of a nominal repetition overlap with a non-SBFD symbol, the non-SBFD symbol may correspond to the nominal repetition.

[0559] In the first-second method, it can be determined based on the first symbol of the nominal repetition. If the first symbol of the nominal repetition overlaps with an SBFD symbol, the SBFD symbol may correspond to the nominal repetition. If the first symbol of the nominal repetition overlaps with a non-SBFD symbol, the non-SBFD symbol may correspond to the nominal repetition.

[0560] In the second method, frequency shifting can be performed in units of actual repetitions. That is, referring to the flowchart of FIG. 24, if the actual repetition corresponds to a non-SBFD symbol in the third step (2420), the index of the starting PRB of the actual repetition is It can be determined as follows. If the actual repetition corresponds to an SBFD symbol, the index of the starting PRB of the actual repetition is It can be determined as such. Since the actual repetition always contains only one type of symbol, the symbol corresponding to the actual repetition may be the one type of symbol.

[0561] Referring to FIGS. 28a through 28c, the terminal may receive a DCI format for scheduling a PUSCH repetition type-B transmission. According to the DCI format, Nominal repetition 0 (Rep#0) may start at symbol 5 of slot n and include 6 consecutive symbols. And, Nominal repetition 1 (Rep#1) may start at symbol 11 of slot n and include 6 consecutive symbols. Nominal repetition 0 (Rep#0) may be one actual repetition (Rep#0). Nominal repetition 1 (Rep#1) may be divided into two actual repetitions. Here, actual repetition (Rep#1) may include 3 consecutive non-SBFD symbols, and actual repetition (Rep#2) may include 3 consecutive SBFD symbols.

[0562] FIG. 28a is a diagram illustrating an example of applying frequency shift according to the method 1-1 of the present disclosure. Referring to FIG. 28a, since all symbols in Nominal repetition 0 (Nominal Rep#0) are non-SBFD symbols, they can correspond to non-SBFD symbols, and since at least one symbol in Nominal repetition 1 (Nominal Rep#1) is an SBFD symbol, they can correspond to SBFD symbols. Accordingly, frequency shift is applied to Nominal repetition 1 (Nominal Rep#1), and the index of the starting PRB is It may be. The position of the starting PRB of actual repetition 1 (actual Rep#1) and actual repetition 2 (actual Rep#2) corresponding to Nominal repetition 1 (Nominal Rep#1) It could be.

[0563] FIG. 28b illustrates an example of applying frequency shifting according to the first-second method of the present disclosure. Referring to FIG. 28b, since the first symbol of Nominal repetition 0 (Nominal Rep#0) is a non-SBFD symbol, it can correspond to a non-SBFD symbol, and since the first symbol of Nominal repetition 1 (Nominal Rep#1) is a non-SBFD symbol, it can correspond to a non-SBFD symbol. Therefore, frequency shifting may not be applied to Nominal repetition 0 (Nominal Rep#0) and Nominal repetition 1 (Nominal Rep#1). Accordingly, the index of the starting PRB of Nominal repetition 0 (Nominal Rep#0) and Nominal repetition 1 (Nominal Rep#1) is It may be. The position of the starting PRB of actual repetition 1 (actual Rep#1) and actual repetition 2 (actual Rep#2) corresponding to Nominal repetition 1 (Nominal Rep#1) It may be. Additionally, actual repetition 2 (actual Rep#2) may overlap with PRBs other than UL subband (or UL usable PRBs). In this case, the terminal may not transmit actual repetition 2 (actual Rep#2).

[0564] FIG. 28c illustrates an example of applying frequency shift according to the second method of the present disclosure. Referring to FIG. 28c, Actual repetition 0 (Actual Rep#0) and Actual repetition 1 (Actual Rep#1) may correspond to non-SBFD symbols, and actual repetition 2 (Actual Rep#2) may correspond to SBFD symbols. Accordingly, frequency shift may not be applied to actual repetition 0 (Actual Rep#0) and actual repetition 1 (Actual Rep#1), and frequency shift may be applied to actual repetition 2 (Actual Rep#2). Accordingly, the index of the starting PRB of actual repetition 0 (Actual Rep#0) and actual repetition 1 (Actual Rep#1) is It could be. The position of the starting PRB of actual repetition 2 (Actual Rep#2) It could be.

[0565] According to the flowchart of FIG. 24, the terminal can perform frequency hopping according to the fourth step (2430) after applying the frequency shift of the third step (2420). If inter-repetition frequency hopping is set, the frequency hopping frequency hop can be determined based on the index of the nominal repetition. If the index of the nominal repetition is even, it corresponds to the first frequency hop, and if the index of the nominal repetition is odd, it corresponds to the second frequency hop.

[0566] Referring to FIG. 28a, a single nominal repetition (Nominal Rep#1) may include multiple actual repetitions, and among the multiple actual repetitions, one may include only SBFD symbols and the other may include only non-SBFD symbols. According to FIG. 28a, the actual repetition 1 (actual Rep#1) corresponding to Nominal repetition 1 (Rep#1) may include only non-SBFD symbols, and the actual repetition 2 (actual Rep#2) may include only SBFD symbols. Since the index of Nominal repetition 1 (Nominal Rep#1) is odd, the Nominal repetition may correspond to the second frequency hop. Therefore, actual repetition 1 (actual Rep#1) may correspond to the second frequency hop of non-SBFD symbols, and actual repetition 2 (actual Rep#2) may correspond to the second frequency hop of SBFD symbols. Therefore, the starting PRB index of actual repetition 1 (actual Rep#1) is and the starting PRB index of actual repetition 2 (actual Rep#2) is It can be. That is, since actual repetition 1 (actual Rep#1) corresponds to a non-SBFD symbol, the frequency hopping function of the non-SBFD symbol It uses, but frequency shift is applied as the input value of the above frequency hopping function. The value can be applied.

[0567] A single nominal repetition (Nominal Rep#1) may include multiple actual repetitions, and among the multiple actual repetitions, the first actual repetition may include only non-SBFD symbols, and the second actual repetition may include SBFD symbols.

[0568] If the index of the nominal repetition is even, the nominal repetition can correspond to the first frequency hop. Thus, the first actual repetition corresponds to the first frequency hop of the non-SBFD symbol, and the second actual repetition can correspond to the first frequency hop of the SBFD symbol.

[0569] If the index of the nominal repetition is odd, the nominal repetition may correspond to the second frequency hop. Thus, the first actual repetition corresponds to the second frequency hop of the non-SBFD symbol, and the second actual repetition may correspond to the second frequency hop of the SBFD symbol.

[0570] According to the method 1-1 of the present disclosure, if the index of the Nominal repetition is even, the starting PRB index of the first actual repetition is And, the starting PRB index of the second actual repetition is It could be.

[0571] According to the method 1-1 of the present disclosure, if the index of the Nominal repetition is odd, the starting PRB index of the first actual repetition is And, the starting PRB index of the second actual repetition is It can be. That is, since the first actual repetition corresponds to a non-SBFD symbol, the frequency hopping function of the non-SBFD symbol It uses, but frequency shift is applied as the input value of the above frequency hopping function. The value can be used.

[0572] According to the first-second method of the present disclosure, if the index of the Nominal repetition is even, the starting PRB index of the first actual repetition is And, the starting PRB index of the second actual repetition is It could be.

[0573] According to the first-second method of the present disclosure, if the index of the Nominal repetition is odd, the starting PRB index of the first actual repetition is And, the starting PRB index of the second actual repetition is It can be. That is, since the second actual repetition corresponds to the SBFD symbol, the frequency hopping function of the SBFD symbol It uses, but frequency shift is not applied as the input value of the above frequency hopping function The value can be used.

[0574] According to the second method of the present disclosure, if the index of the Nominal repetition is even, the starting PRB index of the first actual repetition is And, the starting PRB index of the second actual repetition is It could be.

[0575] According to the second method of the present disclosure, if the index of the Nominal repetition is odd, the starting PRB index of the first actual repetition is And, the starting PRB index of the second actual repetition is It could be.

[0576] FIG. 22 is a drawing illustrating the structure of a terminal in a wireless communication system according to one embodiment of the present disclosure.

[0577] Referring to FIG. 22, the terminal may include a transceiver (referring to a terminal receiver (2200) and a terminal transmitter (2210)), a memory (not shown), and a terminal processing unit (2205, or a terminal control unit or processor). According to the communication method of the terminal described above, the transceiver (2200, 2210), memory, and terminal processing unit (2205) of the terminal may operate. The terminal processing unit (2205, or processor) may control the operation of the terminal according to each of the embodiments described above, as well as a combination of at least one embodiment. However, the components of the terminal are not limited to the examples described above. For example, the terminal may include more components or fewer components than the components described above. Furthermore, the transceiver, memory, and processor may be implemented in the form of a single chip.

[0578] The transceiver can transmit and receive signals with a base station. Here, the signal may include control information and data. To this end, the transceiver may be composed of an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that low-noise amplifies a received signal and down-converts its frequency. However, this is merely one embodiment of the transceiver, and the components of the transceiver are not limited to an RF transmitter and an RF receiver.

[0579] In addition, the transceiver receives a signal through a wireless channel and outputs it to a processor, and can transmit the signal output from the processor through a wireless channel.

[0580] Memory can store programs and data necessary for the operation of the terminal. Additionally, memory can store control information or data included in signals transmitted and received by the terminal. Memory may be composed of storage media or combinations of storage media such as ROM, RAM, hard disk, CD-ROM, and DVD. Additionally, there may be multiple memories.

[0581] In addition, the processor can control a series of processes to enable the terminal to operate according to the aforementioned embodiment. For example, the processor can receive a DCI composed of two layers and control the components of the terminal to receive multiple PDSCHs simultaneously. There may be multiple processors, and the processors can perform the operation of controlling the components of the terminal by executing a program stored in memory.

[0582] FIG. 23 is a drawing illustrating the structure of a base station in a wireless communication system according to one embodiment of the present disclosure.

[0583] Referring to FIG. 23, the base station may include a transceiver unit (2300) and a base station transmitter (2310), a memory (not shown), and a base station processing unit (2305, or a base station control unit or processor). According to the communication method of the base station described above, the transceiver unit (2300, 2310), the memory, and the base station processing unit (2305) of the base station may operate. The base station processing unit (2305, or processor) may control the operation of the base station according to each of the embodiments described above, as well as a combination of at least one embodiment. However, the components of the base station are not limited to the examples described above. For example, the base station may include more components or fewer components than the components described above. Furthermore, the transceiver unit, the memory, and the processor may be implemented in the form of a single chip.

[0584] The transceiver can transmit and receive signals with a terminal. Here, the signal may include control information and data. To this end, the transceiver may be composed of an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that low-noise amplifies a received signal and down-converts its frequency. However, this is merely one embodiment of the transceiver, and the components of the transceiver are not limited to an RF transmitter and an RF receiver.

[0585] In addition, the transceiver receives a signal through a wireless channel and outputs it to a processor, and can transmit the signal output from the processor through a wireless channel.

[0586] Memory can store programs and data necessary for the operation of the base station. Additionally, memory can store control information or data included in signals transmitted and received by the base station. Memory can be composed of storage media or combinations of storage media such as ROM, RAM, hard disk, CD-ROM, and DVD. Additionally, there may be multiple memories.

[0587] A processor can control a series of processes to enable a base station to operate according to the embodiments of the present disclosure described above. For example, the processor can control each component of the base station to configure two layers of DCIs containing allocation information for a plurality of PDSCHs and to transmit them. There may be multiple processors, and the processors can perform control operations on the components of the base station by executing a program stored in memory.

[0588] 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.

[0589] When implemented in software, a computer-readable storage medium may be provided for storing one or more programs (software modules). One or more programs stored in the computer-readable storage medium are configured for execution by one or more processors within an electronic device. 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 this disclosure.

[0590] Such programs (software modules, software) may be stored in random access memory, non-volatile memory including flash memory, ROM (Read Only Memory), Electrically Erasable Programmable Read Only Memory (EEPROM), magnetic disc storage devices, Compact Disc-ROM (CD-ROM), Digital Versatile Discs (DVDs), or other forms of optical storage devices, magnetic cassettes. Alternatively, they may be stored in memory composed of some or all of these. Additionally, each constituent memory may include multiple units.

[0591] Additionally, the program may be stored on an attachable storage device accessible via a communication network such as the Internet, Intranet, Local Area Network (LAN), Wide LAN (WLAN), or Storage Area Network (SAN), or a combination thereof. Such a storage device may be connected to the device performing the embodiment of the present disclosure through an external port. Additionally, a separate storage device on the communication network may be connected to the device performing the embodiment of the present disclosure.

[0592] In the specific embodiments of the present disclosure described above, the components included in the invention are expressed in a singular or plural form according to the specific embodiments presented. However, the singular or plural expression is selected to suit the situation presented for convenience of explanation, and the present disclosure is not limited to singular or plural components; even if a component is expressed in the plural form, it may be composed of a singular form, or even if a component is expressed in the singular form, it may be composed of a plural form.

[0593] Meanwhile, the embodiments of the present disclosure disclosed in this specification and drawings are merely specific examples provided to facilitate the explanation of the technical content of the present disclosure and to aid in understanding the present disclosure, and are not intended to limit the scope of the present disclosure. That is, it is obvious to those skilled in the art that other variations based on the technical concept of the present disclosure are possible. Furthermore, each of the above embodiments may be combined and operated as needed. For example, parts of one embodiment of the present disclosure and parts of another embodiment may be combined to operate a base station and a terminal. For example, parts of the first embodiment and the second embodiment of the present disclosure may be combined to operate a base station and a terminal. In addition, although the above embodiments are presented based on an FDD LTE system, other variations based on the technical concept of the above embodiments may be implemented in other systems such as a TDD LTE system, 5G, or NR system.

[0594] Meanwhile, the order of description in the drawings illustrating the method of the present invention does not necessarily correspond to the order of execution, and the order of execution may be changed or executed in parallel.

[0595] Alternatively, drawings describing the method of the present invention may omit some components and include only some components to the extent that the essence of the present invention is not impaired.

[0596] 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 impair the essence of the invention.

Claims

1. In the method of the terminal, A step of receiving resource information for PUSCH (physical uplink shared channel) from a base station; A step of identifying a first start RB (resource block) corresponding to a first frequency hop based on the above resource information; A step of identifying a second start RB corresponding to a second frequency hop based on a first start RB; It includes the step of transmitting the PUSCH based on the first start RB and the second start RB, and When the above PUSCH is transmitted in an SBFD (subband full duplex) symbol, the first start RB is It is determined based on, The above is the index of the first PRB (physical resource block) of the uplink subband, and Based on the start of the uplink bandwidthpart (BWP) including the above uplink subband, the above A method characterized by determining 2. In Paragraph 1, When the above terminal receives DMRS (demodulation reference signal) bundling from the above base station: The above first frequency hop and second frequency hop are It is determined based on, The above is the index of the slot, and The above A method characterized by the interval of frequency hopping.

3. In Paragraph 1, If the above PUSCH is related to a Type-B PUSCH repetitive transmission: The above first frequency hop and second frequency hop are determined based on the index of the nominal repetition of the PUSCH, and The above first starting RB A method characterized by determining whether it is determined based on the symbol type associated with the actual repetition of the above PUSCH.

4. In Paragraph 3, If the above PUSCH is related to a Type-B PUSCH repetitive transmission: If the actual repetition of the above PUSCH is located at the SBFD symbol, the above first start RB is A method characterized by being determined based on 5. Regarding the base station method, A step of transmitting resource information for PUSCH (physical uplink shared channel) to a terminal; The method includes the step of receiving the PUSCH based on the first start RB and the second start RB, and The above first start RB corresponds to the first frequency hop and is based on the above resource information, and The above second start RB corresponds to a second frequency hop and is based on the above first start RB, and When the above PUSCH is received at an SBFD (subband full duplex) symbol, the first start RB is It is determined based on, The above is the index of the first PRB (physical resource block) of the uplink subband, and Based on the start of the uplink bandwidthpart (BWP) including the above uplink subband, the above A method characterized by determining 6. In Paragraph 5, When the above terminal receives DMRS (demodulation reference signal) bundling from the above base station: The above first frequency hop and second frequency hop are It is determined based on, The above is the index of the slot, and The above A method characterized by the interval of frequency hopping.

7. In Paragraph 5, If the above PUSCH is related to a Type-B PUSCH repetitive transmission: The above first frequency hop and second frequency hop are determined based on the index of the nominal repetition of the PUSCH, and The above first starting RB A method characterized by determining whether it is determined based on the symbol type associated with the actual repetition of the above PUSCH.

8. In Paragraph 7, If the above PUSCH is related to a Type-B PUSCH repetitive transmission: If the actual repetition of the above PUSCH is located at the SBFD symbol, the above first start RB is A method characterized by being determined based on 9. Regarding the terminal, Transmitter / receiver; and Receive resource information for PUSCH (physical uplink shared channel) from the base station, and Based on the above resource information, identify the first start RB (resource block) corresponding to the first frequency hop, and Identify the second start RB corresponding to the second frequency hop based on the first start RB, and It includes a control unit configured to transmit the PUSCH based on the first start RB and the second start RB, and When the above PUSCH is transmitted in an SBFD (subband full duplex) symbol, the first start RB is It is determined based on, The above is the index of the first PRB (physical resource block) of the uplink subband, and Based on the start of the uplink bandwidthpart (BWP) including the above uplink subband, the above A terminal characterized by the determination of 10. In Paragraph 9, When the above terminal receives DMRS (demodulation reference signal) bundling from the above base station: The above first frequency hop and second frequency hop are It is determined based on, The above is the index of the slot, and The above A terminal characterized by being the interval of frequency hopping.

11. In Paragraph 9, If the above PUSCH is related to a Type-B PUSCH repetitive transmission: The above first frequency hop and second frequency hop are determined based on the index of the nominal repetition of the PUSCH, and The above first starting RB A terminal characterized in that whether it is determined based on is determined based on the symbol type associated with the actual repetition of the above PUSCH.

12. In Paragraph 11, If the above PUSCH is related to a Type-B PUSCH repetitive transmission: If the actual repetition of the above PUSCH is located at the SBFD symbol, the above first start RB is A terminal characterized by being determined based on 13. Regarding base stations, Transmitter / receiver; and Transmit resource information for PUSCH (physical uplink shared channel) to the terminal, and It includes a control unit configured to receive the PUSCH based on a first start RB and a second start RB, and The above first start RB corresponds to the first frequency hop and is based on the above resource information, and The above second start RB corresponds to a second frequency hop and is based on the above first start RB, and When the above PUSCH is received at an SBFD (subband full duplex) symbol, the first start RB is It is determined based on, The above is the index of the first PRB (physical resource block) of the uplink subband, and Based on the start of the uplink bandwidthpart (BWP) including the above uplink subband, the above A base station characterized by the determination of 14. In Paragraph 13, When the above terminal receives DMRS (demodulation reference signal) bundling from the above base station: The above first frequency hop and second frequency hop are It is determined based on, The above is the index of the slot, and The above A base station characterized by being the interval of frequency hopping.

15. In Paragraph 13, If the above PUSCH is related to a Type-B PUSCH repetitive transmission: The above first frequency hop and second frequency hop are determined based on the index of the nominal repetition of the PUSCH, and The above first starting RB A base station characterized by the fact that whether it is determined based on the symbol type related to the actual repetition of the above PUSCH is determined based on the symbol type.

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