Method and device for supporting multiple wave forms in wireless communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting a data transmission rate higher than that of a 4G communication system such as LTE. A method for processing control signals in a wireless communication system, of the present disclosure, may comprise the steps of: receiving a first control signal transmitted from a base station; processing the received first control signal; and transmitting, to the base station, a second control signal generated on the basis of the processing.

Description

Method and device for supporting multiple waveforms in a wireless communication system The present disclosure relates to a communication method of a wireless communication system, and in particular to a method and apparatus for transmitting and receiving between a base station and a terminal for improving coverage in a wireless communication system. Looking back at the evolution of wireless communication through successive generations, technologies have been developed primarily for human-oriented services, such as voice, multimedia, and data. Following the commercialization of 5G (5th Generation) communication systems, connected devices, which have been increasing explosively, are expected to be connected to communication networks. Examples of networked objects include vehicles, robots, drones, home appliances, displays, smart sensors installed in various infrastructures, construction machinery, and factory equipment. Mobile devices are expected to evolve into various form factors, such as augmented reality glasses, virtual reality headsets, and holographic devices. In the 6G (6th Generation) era, efforts are underway to develop improved 6G communication systems to connect hundreds of billions of devices and objects to provide diverse services. For this reason, 6G communication systems are being referred to as "beyond 5G" systems. In the 6G communication system predicted to be realized around 2030, the maximum transmission speed is tera (i.e., 1,000 gigabit) bps (bit per second), and the wireless latency is 100 microseconds (μsec). In other words, compared to the 5G communication system, the transmission speed in the 6G communication system is 50 times faster, and the wireless latency is reduced to one-tenth. To achieve such high data transmission speeds and ultra-low latency, 6G communication systems are being considered for implementation in the terahertz (THz) band (e.g., the 95 gigahertz (GHz) to 3 terahertz (3THz) band). Due to more severe path loss and atmospheric absorption phenomena compared to the millimeter wave (mmWave) band introduced in 5G, the importance of technologies capable of guaranteeing signal reach, or coverage, is expected to increase in the terahertz band. As key technologies to ensure coverage, new waveforms, beamforming, and multi-antenna transmission technologies such as massive Multiple-Input and Multiple-Output (MIMO), Full Dimensional MIMO (FD-MIMO), array antennas, and large-scale antennas, which are superior in terms of coverage compared to RF (Radio Frequency) devices, antennas, and OFDM (Orthogonal Frequency Division Multiplexing), must be developed. In addition, new technologies such as metamaterial-based lenses and antennas, high-dimensional spatial multiplexing technology using Orbital Angular Momentum (OAM), and Reconfigurable Intelligent Surface (RIS) are being discussed to improve the coverage of terahertz band signals. In addition, to improve frequency efficiency and system network, development is underway in 6G communication systems for full duplex technology, in which uplink and downlink simultaneously utilize the same frequency resources at the same time; network technology that integrates satellites and HAPS (High-Altitude Platform Stations); network structure innovation technology that supports mobile base stations and enables network operation optimization and automation; dynamic spectrum sharing technology through collision avoidance based on spectrum usage prediction; AI-based communication technology that utilizes AI (Artificial Intelligence) from the design stage and internalizes end-to-end AI support functions to realize system optimization; and next-generation distributed computing technology that realizes services of complexity exceeding the limits of terminal computing capabilities by utilizing ultra-high performance communication and computing resources (Mobile Edge Computing (MEC), cloud, etc.). In addition, attempts are continuing to further strengthen connectivity between devices, further optimize networks, promote the softwareization of network entities, and increase the openness of wireless communication through the design of new protocols to be used in 6G communication systems, the implementation of hardware-based security environments, the development of mechanisms for the safe utilization of data, and the development of technologies regarding privacy maintenance methods. Due to the research and development of such 6G communication systems, it is expected that a new dimension of hyper-connected experience will become possible through the hyper-connectivity of 6G communication systems, which encompasses not only connections between objects but also connections between people and objects. Specifically, it is projected that 6G communication systems will enable the provision of services such as truly immersive eXtended Reality (XR), high-fidelity mobile holograms, and digital replicas. Furthermore, services such as remote surgery, industrial automation, and emergency response, which are provided through 6G communication systems with enhanced security and reliability, will be applied in various fields including industry, healthcare, automotive, and home appliances. The embodiments proposed in this disclosure aim to provide an apparatus and method capable of effectively providing mobile communication services. Specifically, in a system supporting multiple waveforms, a base station and a terminal can effectively perform transmission and reception procedures. The technical problems to be solved by the present disclosure are not limited to those mentioned above, and other unmentioned technical problems may be considered by those skilled in the art from the various embodiments of the present disclosure described below. A method according to one embodiment for solving the above-mentioned problem comprises, in a method for processing a control signal in a wireless communication system, a step of receiving a first control signal transmitted from a base station; a step of processing the received first control signal; a step of generating a second signal based on the processing; and a step of transmitting the generated second control signal to the base station. Embodiments of the present disclosure provide an apparatus and method for achieving coverage improvement of a mobile communication system. Specifically, according to at least one embodiment of the present disclosure, a base station and a terminal in a system supporting multiple waveforms can effectively perform transmission and reception procedures. The effects obtainable from the embodiments of the present disclosure are not limited to those mentioned above, and other unmentioned effects can be clearly derived and understood by those skilled in the art based on the following detailed description. FIG. 1 is a diagram showing the basic structure of the time-frequency resource domain of a 5G system according to one embodiment of the present disclosure. FIG. 2 is a diagram illustrating a random access procedure according to one embodiment of the present disclosure. FIG. 3 is a diagram illustrating a procedure in which a terminal reports terminal capability (UE capability) information to a base station according to one embodiment of the present disclosure. FIG. 4 is a drawing showing an example of a bandwidth portion setting according to one embodiment of the present disclosure. FIG. 5 is a diagram illustrating a block diagram for generating a transmission signal according to one embodiment of the present disclosure. FIG. 6 is a diagram illustrating an operation of adjusting a transmission waveform according to one embodiment of the present disclosure. FIG. 7 is a drawing showing an example of a transmission waveform change according to one embodiment of the present disclosure. FIG. 8 is a diagram showing an example of terminal operation when changing a transmission waveform according to one embodiment of the present disclosure. FIG. 9 is a drawing showing an example of a transmission waveform change according to one embodiment of the present disclosure. FIG. 10 is a diagram showing an example of terminal operation when changing a transmission waveform according to one embodiment of the present disclosure. FIG. 11 is a drawing showing an example of a transmission waveform change according to one embodiment of the present disclosure. FIG. 12 is a diagram showing an example of terminal operation when changing a transmission waveform according to one embodiment of the present disclosure. FIG. 13 is a diagram showing the operation of a terminal according to one embodiment of the present disclosure. FIG. 14 is a diagram showing the operation of a base station according to one embodiment of the present disclosure. FIG. 15 is a drawing showing a transceiver device within a terminal according to one embodiment of the present disclosure. FIG. 16 is a block diagram illustrating the structure of a terminal according to one embodiment of the present disclosure. FIG. 17 is a block diagram illustrating the structure of a base station according to one embodiment of the present disclosure. Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Furthermore, in describing the present disclosure, if it is determined that a detailed description of related known functions or configurations might unnecessarily obscure the essence of the present disclosure, such detailed description will be 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 this specification. 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. The embodiments provided are merely to make the present disclosure 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. 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 instruction means 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). 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. 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 configured to run one or more processors. Thus, 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. Also, in the embodiments, 'parts' may include one or more processors. In describing the present disclosure below, if it is determined that a detailed description of related known functions or configurations could unnecessarily obscure the essence of the present disclosure, such detailed description will be omitted. Embodiments of the present disclosure will be described below with reference to the attached drawings. Terms used in the following description to identify connection nodes, terms referring to network entities, terms referring to messages, terms referring to interfaces between network entities, terms referring to various identification information, etc., are examples provided for the convenience of explanation. Accordingly, the present disclosure is not limited to the terms described below, and other terms referring to objects having equivalent technical meanings may be used. In the following description, the terms "physical channel" and "physical signal" may be used interchangeably with "data" or "control signal." For example, PDSCH (physical downlink shared channel) is a term referring to a physical channel through which data is transmitted, but PDSCH may also be used to refer to data. That is, in this disclosure, the expression "transmits a physical channel" may be interpreted as equivalent to the expression "transmits data or a signal through a physical channel." In the present disclosure, upper layer signaling refers to 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. Upper layer signaling can be understood as a Master Information Block (MIB), System Information Block (SIB), Radio Resource Control (RRC) signaling, or Media Access Control (MAC) control element (CE). For the convenience of the following description, the present disclosure uses terms and names defined in the 3GPP NR (New Radio: 5th generation mobile communication standard) specifications. However, the present disclosure is not limited to the above terms and names and may be applied equally to systems conforming to other standards. For example, regarding 6G systems, which are still in the early stages of standardization discussion, terms and names defined in 5G systems may be generalized and used to describe the operation of 6G systems unless otherwise specifically noted. Hereinafter, the base station is an entity that performs resource allocation for terminals and may be at least one of a gNodeB, gNB, eNodeB, eNB, NodeB, BS (Base Station), wireless access unit, base station controller, or a node on a network. The terminal may include a UE (User Equipment), MS (Mobile Station), cellular phone, smartphone, computer, IoT device, sensor, or multimedia system capable of performing communication functions. Of course, it is not limited to the examples described. 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 known as millimeter wave (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, measures are being considered to achieve even faster transmission speeds and even lower ultra-low latency compared to 5G mobile communication technology. 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 included beamforming and Massive MIMO to mitigate path loss and increase transmission distance in ultra-high frequency bands; support for various numerologies (such as operating 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; the 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. In addition, discussions are underway to improve and enhance the performance of the initial 5G mobile communication technology in consideration of the services that the 5G mobile communication technology was intended to support. Standardization has been carried out 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. In addition, standardization was also carried out for technologies such as the Industrial Internet of Things (IIoT) to support new services through linkage and convergence with other industries, Integrated Access and Backhaul (IAB) which provides nodes to expand 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 RACH for NR which simplifies random access procedures. In addition, standardization is underway for 5G baseline architectures (e.g., Service based Architecture, Service based Interface) for the integration of Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, as well as for Mobile Edge Computing (MEC), which provides services based on the location of the terminal. With the commercialization of such 5G mobile communication systems, 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). In addition, the advancement of these 5G mobile communication systems can serve as a foundation for the development of new waveforms for ensuring coverage of 6G mobile communication technology, multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), array antennas, and large-scale antennas, metamaterial-based lenses and antennas, high-dimensional spatial multiplexing technology using Orbital Angular Momentum (OAM), and Reconfigurable Intelligent Surface (RIS) technology, as well as Full Duplex technology for improving frequency efficiency and system networks of 6G mobile communication technology, AI-based communication technology that realizes system optimization by utilizing satellites and AI from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technology that realizes services of complexity exceeding the limits of terminal computing capabilities by utilizing ultra-high-performance communication and computing resources. While existing mobile communication systems focused on conventional voice / data communication, 5G systems aim to satisfy various services and requirements, such as enhanced mobile broadband (eMBB) services to improve existing voice / data communication, ultra-reliable and low latency communication (URLLC) services, and massive machine type communication (MTC) services to support mass communication of the machine. While the transmission bandwidth per carrier of existing mobile communication systems, such as LTE (Long Term Evolution or E-UTRA (Evolved Universal Terrestrial Radio Access)) and LTE-A (LTE-Advanced or E-UTRA Evolution), is limited to a maximum of 20 MHz, 5G systems utilize significantly wider ultra-wide bandwidths to primarily aim for ultra-high-speed data services reaching several Gbps. Accordingly, 5G systems are considering ultra-high frequency bands ranging from several GHz to a maximum of 100 GHz as operating frequencies, where securing ultra-wide bandwidth frequencies is relatively easy. Additionally, it is possible to secure wide bandwidth frequencies for 5G systems through frequency reallocation or allocation from frequency bands ranging from hundreds of MHz to several GHz used by existing mobile communication systems. Radio waves in the ultra-high frequency band have wavelengths of several millimeters and are also called millimeter waves (mmWave). However, in the ultra-high frequency band, path loss of radio waves increases in proportion to the frequency band, and the coverage of mobile communication systems becomes smaller. To overcome the disadvantage of reduced coverage in the ultra-high frequency band, beamforming technology is applied by using multiple antennas to concentrate radio wave radiated energy toward a specific target point, thereby increasing the reach of the radio waves. In other words, a signal to which beamforming technology is applied has a relatively narrower beam width, and as radiated energy is concentrated within this narrowed beam width, the reach of the radio waves is increased. Beamforming technology can be applied to both the transmitting and receiving ends. In addition to the effect of increasing coverage, beamforming technology has the effect of reducing interference in areas outside the beamforming direction. For beamforming technology to operate properly, accurate measurement and feedback methods for the transmit and receive beams are required. Beamforming technology can be applied to control channels or data channels that correspond one-to-one between a specific terminal and a base station. Furthermore, beamforming technology can also be applied to control and data channels used to transmit common signals transmitted by a base station to multiple terminals within the system—such as synchronization signals, physical broadcast channels (PBCH), and system information—in order to increase coverage. When applying beamforming technology to a common signal, beam sweeping technology, which changes the beam direction to transmit the signal, is additionally applied to ensure that the common signal reaches terminals located at any position within the cell. Another requirement for 5G systems is ultra-low latency services, where the transmission delay between the transmitter and receiver is approximately 1ms. As a measure to reduce transmission delay, it is necessary to design a frame structure based on a short TTI (transmission time interval) that is shorter than that of LTE and LTE-A. TTI is the basic time unit for performing scheduling, and the TTI of existing LTE and LTE-A systems is 1ms, which corresponds to the length of one subframe. For example, in 5G systems, short TTIs such as 0.5ms, 0.25ms, and 0.125ms are possible, which are shorter than those of existing LTE and LTE-A systems, to satisfy the requirements for ultra-low latency services. FIG. 1 is a diagram showing the basic structure of a time-frequency resource domain of a 5G system according to one embodiment of the present disclosure. That is, FIG. 1 is a diagram showing the basic structure of a time-frequency resource domain, which is a wireless resource domain where data or control channels of a 5G system are transmitted. Referring to FIG. 1, the horizontal axis represents the time domain and the vertical axis represents the frequency domain. The minimum transmission unit of a 5G system in the time domain is an OFDM (orthogonal frequency division multiplexing) symbol, A number of symbols (102) are combined to form a slot (106), and A number of slots can be combined to form a single subframe (105). The length of a single subframe (105) is 1.0 ms, and 10 subframes can be combined to form a 10 ms frame (114). The minimum transmission unit in the frequency domain is a subcarrier, and the bandwidth of the entire system transmission bandwidth is a total of N BW It can be composed of several subcarriers (104). In the time-frequency domain, the basic unit of a resource is a resource element (RE) (112), which can be represented by an OFDM symbol index and a subcarrier index. A resource block (RB or Physical Resource Block, PRB) is in the frequency domain. It can be defined as a series of consecutive subcarriers (110). In a 5G system = 12, and the data rate can increase in proportion to the number of RBs scheduled to the terminal. In a 5G system, base stations map data in RB units and can generally perform scheduling on RBs that constitute a slot for a given terminal. That is, in a 5G system, the basic time unit for which scheduling is performed is a slot, and the basic frequency unit for which scheduling is performed may be an RB. OFDM symbol count It is determined by the length of the cyclic prefix (CP) added to each symbol to prevent interference between symbols; for example, if a normal CP is applied = 14, if Extended CP is applied = 12. Extended CP is applied to systems with relatively longer transmission distances than standard CP, enabling the maintenance of orthogonality between symbols. In the case of standard CP, the ratio of CP length to symbol length is maintained at a constant value, allowing the overhead caused by CP to remain constant regardless of the subcarrier spacing. That is, if the subcarrier spacing is small, the symbol length increases, and consequently, the CP length can also increase. Conversely, if the subcarrier spacing is large, the symbol length decreases, and consequently, the CP length can be reduced. The symbol length and CP length can be inversely proportional to the subcarrier spacing. In 5G systems, various frame structures can be supported by adjusting the subcarrier spacing to satisfy diverse services and requirements. For example, From the perspective of the operating frequency band, a larger subcarrier spacing is advantageous for recovering phase noise in the high-frequency band. From the perspective of transmission time, a large subcarrier spacing shortens the symbol length in the time domain, and consequently shortens the slot length, which is advantageous for supporting ultra-low latency services such as URLLC. From the perspective of cell size, a longer CP length allows for the support of larger cells, so a smaller subcarrier spacing allows for the support of relatively larger cells. In mobile communication, a cell is a concept referring to the area covered by a single base station. Subcarrier spacing and CP length are essential information for OFDM transmission and reception, and smooth transmission and reception are possible only when the base station and the terminal recognize the subcarrier spacing and CP length as common values. shows the relationship between the subcarrier spacing configuration (μ), subcarrier spacing (Δf), and CP length supported by the 5G system. shows the number of symbols per slot for each subcarrier spacing setting (μ) for the general type CP ( ), number of slots per frame( ), number of slots per subframe( It represents ). shows the number of symbols per slot for each subcarrier spacing setting (μ) for extended CP ( ), number of slots per frame( ), number of slots per subframe( It represents ). A 5G system can satisfy various user requirements through coexistence or dual-mode operation with existing LTE or / and LTE-A (hereinafter LTE / LTE-A) systems. For example, existing LTE / LTE-A systems can provide stable system operation to terminals, while 5G systems can perform the role of providing enhanced services to terminals. Therefore, the frame structure of a 5G system needs to include at least the frame structure of LTE / LTE-A or a set of essential parameters (subcarrier spacing = 15 kHz). For example, when comparing a frame structure with a subcarrier spacing setting μ=0 (hereinafter frame structure A) and a frame structure with a subcarrier spacing setting μ=1 (hereinafter frame structure B), compared to frame structure A, frame structure B shows that the subcarrier spacing and RB size are doubled, while the slot length and symbol length are doubled. In the case of frame structure B, two slots can form one subframe, and 20 subframes can form one frame. Generalizing the frame structure of a 5G system provides high scalability by ensuring that the essential parameter sets, such as subcarrier spacing, CP length, and slot length, have an integer multiple relationship with each other for each frame structure. Additionally, a subframe of fixed length of 1ms can be defined to represent a reference time unit independent of the frame structure. The frame structure of a 5G system can be applied to various scenarios. From the perspective of cell size, since a longer CP length enables support for larger cells, Frame Structure A can support relatively larger cells compared to Frame Structure B. From the perspective of operating frequency band, since a larger subcarrier spacing is advantageous for recovering phase noise in the high-frequency band, Frame Structure B can support relatively higher operating frequencies compared to Frame Structure A. From the perspective of service, since a shorter slot length—the basic time unit of scheduling—is advantageous for supporting ultra-low latency services such as URLLC, Frame Structure B may be relatively more suitable for URLLC services compared to Frame Structure A. In a manner similar to the coexistence of 5G and LTE / LTE-A mentioned above, it may be necessary to design a system for the coexistence of 6G, which will arrive with the evolution of future communication systems, and existing systems such as 5G or LTE / LTE-A. In the following description of the present disclosure, an uplink (UL) refers to a wireless link through which a terminal transmits data or control signals to a base station, and a downlink (DL) may refer to a wireless link through which a base station transmits data or control signals to a terminal. In the initial access phase, when the terminal first connects to the system, the terminal can synchronize downlink time and frequency from the synchronization signal transmitted by the base station through a cell search and obtain a cell ID. Then, the terminal can use the obtained cell ID to receive a physical broadcast channel (PBCH) and obtain a master information block (MIB), which is essential system information, from the PBCH. The MIB may include the following information. For example, the above essential system information may include at least one of the following: information regarding the location of a synchronization signal received by the terminal in the time domain and / or frequency domain; control information for the terminal to receive system information (or system information block, SIB) transmitted by the base station (which may be information for scheduling a data channel for receiving system information); information regarding whether the cell is connectable; and information regarding the SCS of the cell. The above essential system information may be referred to as system information. Additionally, the terminal can receive system information transmitted by the base station to obtain cell-common transmission and reception related control information. The cell-common transmission and reception related control information may include random access related control information, paging related control information, and common control information for various physical channels and signals (at least one of channels and signals, such as an uplink control channel, an uplink data channel, a downlink control channel and a downlink data channel, a physical signal for obtaining uplink channel status information, a physical signal for obtaining downlink channel status information, and a physical signal for demodulating a physical channel). The control information may be configuration information for each channel or signal. The system information may be referred to, for example, as SIB1 or RMSI (remaining minimum system information). The synchronization signal is a signal that serves as a reference for cell search, and a subcarrier spacing can be applied for each frequency band to suit channel environments such as phase noise. In the case of data channels or control channels, as described above, a subcarrier spacing may be applied differently depending on the service type to support various services. In 5G systems, a combination consisting of PSS (primary synchronization signal), SSS (secondary synchronization signal), and PBCH (Physical broadcast channel) is referred to as an SS / PBCH block or SSB. In addition to the above initial connection procedure, the terminal may also receive an SSB to determine whether the radio link quality of the current cell is maintained at a certain level or higher. Additionally, in the procedure where the terminal performs a handover from the current cell to an adjacent cell, the terminal may receive an SSB from an adjacent cell to determine the radio link quality of the adjacent cell and to obtain time / frequency synchronization of the adjacent cell. After the terminal obtains MIB and system information from the base station through the initial access procedure, the terminal may perform a random access procedure to transition the link with the base station to a connected state (connected state or RRC_CONNECTED state). Upon completion of the random access procedure, the terminal transitions to a connected state, enabling one-to-one communication between the base station and the terminal. The random access procedure will be explained in detail below with reference to FIG. 2. FIG. 2 is a diagram illustrating a random access procedure according to one embodiment of the present disclosure. Referring to FIG. 2, as a first step (210) of the random access procedure, the terminal transmits a random access preamble to the base station. The random access preamble, which is the initial transmission message of the terminal in the random access procedure, may be referred to as message 1. The base station can measure the transmission delay value between the terminal and the base station from the random access preamble and synchronize the uplink. At this time, the terminal may arbitrarily select which random access preamble to use from a set of random access preambles given in advance by system information. The initial transmission power of the random access preamble may be determined according to the path loss between the base station and the terminal measured by the terminal. Additionally, the terminal may determine the transmission beam direction of the random access preamble from the synchronization signal received from the base station and transmit the random access preamble. In the second step (220), the base station transmits a message to the terminal containing an uplink transmission timing control command based on the transmission delay value measured from the random access preamble received in the first step (210). The terminal receives control information for scheduling the message over the downlink control channel and receives the message over the downlink data channel based on the control information. The message transmitted in the second step may be referred to as message 2, or a response to the random access preamble or a random access response. Additionally, the base station may transmit the message by including, as scheduling information, uplink resources to be used by the terminal to transmit a response message (message 3) to message 2 and power control commands to be applied to the response message. The scheduling information may include control information regarding the terminal's uplink transmission beam. Additionally, the message may further include a temporary identifier of the terminal to be used during the random access procedure. The information included in the message is merely an example, and one or more of the information described above may be included in message 2. If the terminal does not receive message 2, which is scheduling information for message 3, from the base station within a predetermined time during the second step (220), the first step (210) can be performed again. If the first step (210) is performed again, the terminal can increase the probability of receiving the random access preamble by the base station by increasing the transmission power of the random access preamble by a predetermined step (power ramping). In the third step (230), the terminal transmits uplink data (message 3) including its terminal ID to the base station via the uplink data channel (physical uplink shared channel, PUSCH) using the uplink resources allocated in the second step (220). 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 (220). 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 (220) and the power ramping value of the random access preamble. The uplink data channel for transmitting Message 3 may refer to the first uplink data signal transmitted by the terminal to the base station after the transmission of the random access preamble. For example, the message 3 may include an upper layer message for the terminal to connect to the network. In step 4 (240), if the base station determines that the terminal has performed random access without collision with other terminals, it transmits data (message 4) containing the ID of the terminal that transmitted uplink data in step 3 (230) to the terminal. When the terminal receives the signal transmitted by the base station in step 4 (240), it can determine that the random access was successful. Then, the terminal can transmit HARQ-ACK information indicating successful reception of message 4 to the base station through the Physical Uplink Control Channel (PUCCH). If the data transmitted by the terminal in the third step (230) collides with the data of another terminal and the base station fails to receive the data signal from the terminal, the base station may not transmit any further data to the terminal. Accordingly, if the terminal fails to receive the data transmitted from the base station in the fourth step (240) within a certain period of time, it may determine that the random access procedure has failed and start again from the first step (210). The four-step random access procedure described above is merely an example, and the information between the terminal and the base station described above may also be transmitted through messages other than the four-step message described above. For example, the terminal may transmit one or more messages containing at least one of the information in message 1 and 3 to the base station simultaneously or sequentially, and the base station may transmit one or more messages containing at least one of the information in message 2 and 4 to the terminal simultaneously or sequentially. Upon successful completion of the random access procedure, the terminal transitions to a connected state, enabling one-to-one communication between the base station and the terminal. The base station receives UE capability information from the connected terminal and can adjust scheduling by referring to that information. Through the UE capability information, the terminal can inform the base station of whether it supports specific functions and the maximum allowable value of the functions it supports. Therefore, the UE capability information reported by each terminal to the base station may vary depending on the terminal. For example, the terminal may report UE capability information to the base station as UE capability information, including at least a portion of the following control information. - Control information related to frequency bands supported by the terminal - Control information related to channel bandwidth supported by the terminal - Control information regarding the maximum modulation scheme supported by the terminal - Control information regarding the maximum number of beams supported by the terminal - Control information regarding the maximum number of layers supported by the terminal - Control information related to CSI reporting supported by the terminal - Control information on whether the terminal supports frequency hopping - Bandwidth-related control information when Carrier Aggregation (CA) is supported - Control information on whether cross-carrier scheduling is supported when carrier bundling is supported FIG. 3 is a diagram illustrating a procedure in which a terminal reports terminal capability (UE capability) information to a base station according to one embodiment of the present disclosure. Referring to FIG. 3, in step 310, the base station (302) can send a UE capability information request message to the terminal (301). In step 320, in response to a request for UE capability information from the base station, the terminal can transmit UE capability information to the base station. Next, the Bandwidth Part (BWP) setting in the 5G communication system will be explained in detail with reference to the drawing. Figure 4 is a diagram illustrating an example of a bandwidth portion setting in a 5G communication system. FIG. 4 shows an example in which the terminal bandwidth (UE bandwidth) (400) is configured into two bandwidth portions, namely bandwidth portion #1 (BWP#1) (401) and bandwidth portion #2 (BWP#2) (402). The base station may configure one or more bandwidth portions for the terminal and may configure the information in below for each bandwidth portion. 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 higher-layer signaling, for example, Radio Resource Control (RRC) signaling. Among the one or more configured bandwidth portions, at least one bandwidth portion 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 DCI. According to some embodiments, prior to the 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 regarding a Control Resource Set (CORESET) and a Search Space via the MIB, through which a PDCCH can be transmitted to receive System Information Blocks required for initial connection. The Control Resource Set and Search Space configured via the MIB may each be considered as Identity (ID) 0 (CORESET 0, Search Space 0). The base station may notify the terminal via the MIB of configuration information, such as frequency allocation information, time allocation information, and subcarrier interval settings, for Control Resource Set #0. Additionally, the base station may notify the terminal via the MIB of configuration information regarding the monitoring period and monitoring 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. The settings for the bandwidth portion supported by the above 5G can be used for various purposes. 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. In addition, according to some embodiments, a base station may set multiple bandwidth portions for a terminal for the purpose of supporting different subcarrier spacing settings. For example, to support data transmission and reception using both a 15 kHz subcarrier spacing and a 30 kHz subcarrier spacing for a terminal, two bandwidth portions may be set to subcarrier spacings of 15 kHz and 30 kHz, respectively. Different bandwidth portions may be frequency division multiplexed (FDM), and when data transmission and reception is to be performed at a specific subcarrier spacing, the bandwidth portion set to that subcarrier spacing may be activated. 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. In the method for configuring the above bandwidth portion, terminals prior to RRC connection (Connected) can receive configuration information for the Initial Bandwidth Part (Initial BWP) through the MIB during the initial connection phase. More specifically, the terminal can receive a configuration of a control area (i.e., CORESET) for a downlink control channel through which a DCI scheduling a System Information Block (SIB) can be transmitted from the MIB of the Physical Broadcast Channel (PBCH). The bandwidth of the control area configured 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 the SIB is transmitted. In addition to receiving the SIB, the Initial Bandwidth Part may also be utilized for paging and random access. Next, downlink control information (DCI) in 5G systems will be explained in detail. In a 5G system, scheduling information for uplink data (or physical uplink shared channel (PUSCH)) or downlink data (or physical downlink shared channel (PDSCH)) can be transmitted from a base station to a 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 predefined between the base station and the terminal, and the non-fallback DCI format may include configurable fields. DCI can be transmitted via 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 with the terminal's identity identifier (e.g., radio network temporary identifier, RNTI). 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 its assigned RNTI; if the CRC check result is correct, the terminal knows that the message has been transmitted to it. For example, a DCI scheduling a PDSCH for system information can be scrambled to SI-RNTI. A DCI scheduling a PDSCH for a RAR message can be scrambled to RA-RNTI. A DCI scheduling a PDSCH for a paging message can be scrambled to P-RNTI. A DCI notifying a SFI (slot format indicator) can be scrambled to SFI-RNTI. A DCI notifying a TPC (transmit power control) can be scrambled to TPC-RNTI. A DCI scheduling a terminal-specific PDSCH or PUSCH can be scrambled to C-RNTI (cell RNTI). A base station may operate by applying a predetermined DCI format to a terminal to be scheduled, depending on whether it is scheduling information for downlink data (downlink assignment), scheduling information for uplink data (uplink grant), or DCI for purposes other than data scheduling, such as power control. The base station can transmit downlink data to the terminal via the Physical Downlink Shared Channel (PDSCH), which is a physical channel for downlink data transmission. Scheduling information, such as specific mapping locations in the time and frequency domains of the PDSCH, modulation schemes, HARQ-related control information, and power control information, can be provided by the base station to the terminal through the DCI related to downlink data scheduling information among the DCIs transmitted via the PDSCH. The terminal can transmit uplink data to the base station via the PUSCH (physical uplink shared channel), which is a physical channel for uplink data transmission. Scheduling information, such as specific mapping locations in the time and frequency domains of the PUSCH, modulation schemes, HARQ-related control information, and power control information, can be provided by the base station to the terminal through the DCI related to uplink data scheduling information among the DCIs transmitted via the PDCCH. The time-frequency resource to which the PDCCH is mapped is called a control resource set (CORESET). In the frequency domain, a CORESET can be configured on all or part of the frequency resources within the bandwidth supported by the terminal. In the time domain, it can be configured with one or more OFDM symbols, which can be defined as the CORESET duration. A base station can configure one or more CORESETs for the terminal through higher-layer signaling (e.g., System Information, Master Information Block (MIB), Radio Resource Control (RRC) signaling). Configuring a CORESET for a terminal may mean providing information such as the CORESET identifier, the frequency location of the CORESET, and the symbol length of the CORESET. The information provided by the base station to the terminal to configure a CORESET may include at least some of the information included in . CORESET in the frequency domain It can be composed of RBs, and in the time domain It can be composed of ∈{1,2,3} symbols. A PDCCH can be composed of one or more CCEs (Control Channel Elements). One CCE can be composed of six REGs (Resource Element Groups), and a REG can be defined as one RB during one OFDM symbol. Within a CORESET, REGs can be indexed in time-first order starting with REG index 0, beginning with the first OFDM symbol of the CORESET, the lowest RB. Interleaved and non-interleaved methods may be supported as transmission methods for PDCCH. The base station may configure the terminal to perform interleaved or non-interleaved transmission for each CORESET through upper-layer signaling. Interleaving may be performed on a REG bundle basis. A REG bundle may be defined as a set of one or more REGs. Based on the interleaved or non-interleaved transmission configuration received from the base station, the terminal may determine the CCE-to-REG mapping method in the corresponding CORESET in the manner shown in below. The base station can inform the terminal of configuration information, such as which symbol the PDCCH is mapped to within the slot and the transmission period, through signaling. The search space of a PDCCH is described as follows. The number of CCEs required to transmit a PDCCH can be 1, 2, 4, 8, or 16 depending on the Aggregation Level (AL), and different numbers of CCEs can be used for link adaptation of the downlink control channel. For example, when AL=L, one downlink control channel can be transmitted through L CCEs. The terminal performs blind decoding to detect signals without knowing information about the downlink control channel; to this end, a search space representing a set of CCEs can be defined. The search space is a set of downlink control channel candidates consisting of CCEs that the terminal must attempt to decode at a given aggregation level. Since there are various aggregation levels that form a group of 1, 2, 4, 8, or 16 CCEs, the terminal may have multiple search spaces. A Search Space Set can be defined as a set of search spaces at all established aggregation levels. Search spaces can be classified into Common Search Spaces (CSS) and UE-specific Search Spaces (USS). A certain group of terminals or all terminals may monitor the Common Search Space of a PDCCH to receive cell-common control information, such as dynamic scheduling or paging messages for System Information Blocks (SIBs). For example, a terminal may receive scheduling allocation information for a PDSCH for receiving system information by monitoring 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 may be defined as a pre-agreed set of CCEs. Scheduling allocation information for a UE-specific PDSCH or PUSCH may be received by a terminal by monitoring the UE-specific Search Space of the PDCCH. The UE-specific Search Space may be defined specifically as a function of the terminal's ID (Identity) and various system parameters. The base station can configure configuration information for the search space of the PDCCH to the terminal through upper-layer signaling (e.g., SIB, MIB, RRC signaling). For example, the base station can configure the number of PDCCH candidates at each aggregation level L, the monitoring period for the search space, the 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 CORESET index to be monitored for the search space to the terminal. For example, parameters for the search space of the PDCCH may include information such as that shown in below. According to the configuration information, the base station may set one or more 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. In search space set 1, the terminal may be configured to monitor DCI format A scrambled with X-RNTI in a common search space, and in search space set 2, the terminal may be configured to monitor DCI format B scrambled with Y-RNTI in a terminal-specific search space. 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. In the common search space, terminals can monitor the following combinations of DCI formats and RNTI. Of course, they are not limited to the following examples. - 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 - DCI format 2_0 with CRC scrambled by SFI-RNTI - DCI format 2_1 with CRC scrambled by INT-RNTI - DCI format 2_2 with CRC scrambled by TPC-PUSCH-RNTI, TPC-PUCCH-RNTI - DCI format 2_3 with CRC scrambled by TPC-SRS-RNTI Terminal—In a specific search space, the terminal can monitor the following combinations of DCI formats and RNTI. Of course, it is not limited to the following examples. - DCI format 0_0 / 1_0 with CRC scrambled by C-RNTI, CS-RNTI, TC-RNTI - DCI format 1_0 / 1_1 with CRC scrambled by C-RNTI, CS-RNTI, TC-RNTI Meanwhile, RNTIs may follow the following definitions and uses. - C-RNTI (Cell RNTI): Used for terminal-specific PDSCH or PUSCH scheduling - TC-RNTI (Temporary Cell RNTI): Used for terminal-specific PDSCH scheduling - CS-RNTI (Configured Scheduling RNTI): Used for semi-static terminal-specific PDSCH scheduling. - RA-RNTI (Random Access RNTI): Used for PDSCH scheduling during the random access phase - P-RNTI (Paging RNTI): Used for PDSCH scheduling where paging is transmitted - SI-RNTI (System Information RNTI): Used for PDSCH scheduling where system information is transmitted - INT-RNTI (Interruption RNTI): Used to indicate whether PDSCH has been punctured. - TPC-PUSCH-RNTI (Transmit Power Control for PUSCH RNTI): Used to instruct power control commands to the PUSCH - TPC-PUCCH-RNTI (Transmit Power Control for PUCCH RNTI): Used to instruct power control commands to the PUCCH - TPC-SRS-RNTI (Transmit Power Control for SRS RNTI): Used to instruct power control commands to the SRS The DCI formats described above may follow the definitions in below. In CORESET p and search space set s, the search space of aggregate level L can be expressed as follows: [Mathematical Formula 1] - L: Lamination Level - n CI : Carrier Index - N CCE,p : Total number of CCEs existing in control resource set p - n μ s,f : Slot Index - M (L) p,s,max : Number of PDCCH candidates at assembly level L - m snCI = 0, ..., M (L) p,s,max -1: PDCCH candidate index of aggregation level L - i = 0, ..., L-1 - - n RNTI : Terminal identifier The value may be 0 for the common search space. In the case of a terminal-specific search space, the value may correspond to a value that changes according to the terminal's ID (C-RNTI or the ID set by the base station for the terminal) and the time index. In the following, we will specifically describe the method by which a terminal measures channel conditions in a 5G communication system and reports them to a base station. Channel state information (CSI) may include the following information. Channel Quality Indicator (CQI): CQI index indication information consisting of a modulation scheme and coding rate that satisfy the predefined minimum receive error rate of PDSCH. Precoding Matrix Indicator (PMI): Precoding matrix indicator information selected by the terminal CRI (CSI-RS resource indicator): CSI-RS information measured by the terminal RI (Rank Indicator): Rank indicator information selected by the terminal LI (Layer indicator): Indicator information for the best layer among the precoding matrices reported by the terminal. SSBRI (SS / PBCH block resource indicator): SSB information measured by the terminal L1-RSRP (Reference Signal Received Power): L1 RSRP information measured by the terminal The base station can control the time and frequency resources for the terminal's aforementioned CSI measurement and reporting. For CSI measurement and reporting operations, 'Aperiodic', 'Semi-Persistent', and 'Periodic' methods are supported, and the base station can configure which method to use for the terminal via signaling. Semi-persistent CSI reporting methods support 'Semi-PersistentOnPUCCH' and 'Semi-PersistentOnPUSCH'. For periodic or semi-persistent CSI reporting methods, the terminal can receive the PUCCH or PUSCH resources to transmit the CSI from the base station via upper-layer signaling. The period and slot offset of the PUCCH or PUSCH resources to transmit the CSI can be provided by the subcarrier interval setting of the uplink (UL) bandwidth part configured for CSI reporting transmission. In the case of a non-periodic CSI reporting method, the terminal can receive a PUSCH resource to transmit the CSI from the base station via L1 signaling (the aforementioned DCI format 0_1) for scheduling. Non-periodic CSI reporting of the terminal can be performed using PUSCH, periodic CSI reporting can be performed using PUCCH, and semi-permanent CSI reporting can be performed using PUSCH when triggered or activated by DCI, and using PUCCH after being activated by the MAC control element (MAC CE). Non-periodic CSI reporting can be triggered by the “CSI request” field of the aforementioned DCI format 0_1, which corresponds to the scheduling DCI for PUSCH. As the frequency band increases, coverage decreases due to relatively high path loss. The following describes how a base station signals the modulation and coding scheme (MCS) applied to PDSCH or PUSCH to a terminal. The terminal receives MCS control information (MCS index, I) included in the DCI received from the base station. MCS Referring to ) and the pre-agreed MCS table, the modulation index (modulation order, Q) applied to PDSCH or PUSCH m ) and the target code rate (R) can be obtained. shows an example of an MCS table. According to , the modulation index can be determined from 2, 4, 6, 8, or 10 depending on the MCS control information, and the target code rate can be determined from a minimum of 120 / 1024 to a maximum of 948 / 1024. The MCS control information can be represented by 5 bits, and a modulation index of 2 represents QPSK, a modulation index of 4 represents 16QAM, a modulation index of 6 represents 64QAM, a modulation index of 8 represents 256QAM, and a modulation index of 10 represents 1024QAM. For example, the base station transmits the DCI to the terminal as scheduling information for the PDSCH to be transmitted, and the MCS control information within that DCI is I MCS If signaled as = 14, Q according to below m = 6, R = 873 / 1024. That is, the terminal can determine that the modulation scheme of the PDSCH to be received is 64QAM and that the target code rate is 873 / 1024. Furthermore, the terminal can determine the size of the transport block (transport block size, TBS) mapped to the PDSCH from the acquired modulation scheme and target code rate, and the time and frequency resource allocation information acquired from the DCI. The following describes methods for adjusting the waveform of a transmission signal to improve the coverage of a wireless communication system. Coverage is one of the key performance indicators of a wireless communication system, representing the range of a transmission signal between a terminal and a base station. Higher coverage allows for fewer base stations to be deployed per unit area, which offers the advantage of reducing installation costs for telecommunication operators. Generally, since the transmission power of a signal sent by a base station is greater than that sent by a terminal, downlink coverage is more advantageous than uplink coverage in terms of coverage. However, in an environment where the operating frequency band of mobile communication systems is gradually expanding into high-frequency bands, the need to improve downlink coverage as well as uplink coverage becomes critical due to the relatively high path loss in high-frequency bands. In 5G systems, two waveforms are defined for the uplink data channel (PUSCH) transmitted by the terminal: CP-OFDM (Cyclic Prefix Orthogonal Frequency Division Multiplexing, also called OFDM) and DFT-S-OFDM (Discrete Fourier Transform Spread OFDM). In general, CP-OFDM offers the advantage of more flexible resource allocation and relatively lower receiver complexity compared to DFT-S-OFDM. In particular, the demodulation performance of high MCS (Modulation and Coding Scheme) is superior to DFT-S-OFDM in frequency-selective channels. Therefore, CP-OFDM-based waveforms may be more desirable for achieving high frequency efficiency. On the other hand, since a low PAPR (Peak to Average Power Ratio) allows for the expectation of high power amplifier efficiency, low PAPR characteristics are an important factor to consider for waveforms. Because DFT-S-OFDM has a lower PAPR compared to CP-OFDM, it has advantages over CP-OFDM in power-constrained situations. In other words, when a terminal uses a low MCS in a power-constrained environment, DFT-S-OFDM can provide relatively high link performance gains, which can lead to improved coverage. Therefore, DFT-S-OFDM may be more suitable for power-constrained scenarios. Figure 5 is a diagram illustrating an example of a transmission block diagram for generating a transmission signal in a 5G system. Referring to FIG. 5, in step 501, the transmitter generates a codeword for the data to be transmitted, and then in step 502, scrambling of the codeword can be performed as a randomization procedure. The scrambling signal in step 502 can be modulated in step 503 according to a modulation method such as QPSK (Quadrature Phase Shift Keying) or QAM (Quadrature Amplitude Modulation). In step 504, the modulated signal can be mapped to a layer. Depending on whether it is CP-OFDM or DFT-S-OFDM, if it is CP-OFDM, the mapped signal can be mapped to a CP-OFDM resource through step 506, or if it is DFT-S-OFDM, it can be mapped to a resource in step 506 after undergoing a transform precoding procedure in step 505. The signal mapped to the resource can be transmitted through a transmitting antenna after undergoing Inverse Fast Fourier Transform (IFFT) processing in step 507, followed by the addition of a Cyclic Prefix (CP) in step 507. In this disclosure, CP-OFDM can be understood as the case where transform precoding is disabled. DFT-S-OFDM can be understood as the case where transform precoding is enabled. In 5G systems, CP-OFDM is used for the downlink and CP-OFDM and DFT-S-OFDM are used for the uplink for transmission and reception between a base station and a terminal. The base station can inform the terminal which waveform to use for the uplink. For example, it can instruct the terminal to use CP-OFDM to ensure high frequency efficiency and to use DFT-S-OFDM to ensure coverage. To extend downlink coverage, similar methods can be applied to downlink signal transmission. For example, a base station can inform a terminal which waveform to use for the downlink. To ensure high frequency efficiency, it may instruct the use of CP-OFDM, and to ensure coverage, it may instruct the use of DFT-S-OFDM. FIG. 6 is a diagram illustrating an operation of adjusting a transmission waveform of a base station according to one embodiment of the present disclosure. Specifically, FIG. 6 illustrates an operation in which a base station selectively instructs a terminal to apply a waveform to a downlink from among CP-OFDM and DFT-S-OFDM, and the terminal receives a PDSCH in accordance with the instructed waveform. FIG. 6 illustrates a case where terminal #1 (620) and terminal #2 (630) are located within the coverage (615) of a cell managed by a base station (BS) (610). Terminal #1 is located near the base station (near the center of the cell) compared to terminal #2, indicating a situation where the channel condition is relatively good, while terminal #2 is located at a relatively far distance from the base station (near the boundary of the cell), indicating a situation where coverage needs to be secured. The base station can determine the situation of the terminal based on the channel condition information measured and reported by each terminal. In the example of FIG. 6, the base station determines that the channel condition is good for terminal #1 and instructs it to apply CP-OFDM as the transmission waveform when transmitting PDSCH (621). Accordingly, terminal #1 can receive PDSCH in the CP-OFDM manner in accordance with the base station's instructions (622). Meanwhile, the base station may determine that the channel conditions for terminal #2 are poor and that coverage improvement is needed, and may instruct terminal #2 to apply DFT-S-OFDM as the transmission waveform when transmitting PDSCH (631). Accordingly, terminal #2 can receive PDSCH in the DFT-S-OFDM manner according to the base station's instructions (632). When the base station instructs the terminal to the transmission waveform, it may use at least one of the following methods. - Signaling method 1: Instruction through upper-layer signaling. As described above, upper-layer signaling can be at least one of MIB, SIB, RRC, MAC CE signaling or a combination of one or more. Signaling method 1 has the characteristic of having relatively fewer problems caused by signaling errors through upper-layer error recovery functions, whereas a certain transmission delay is unavoidable until signaling is completed. - Signaling Method 2: Instruction via L1 signaling. As described above, L1 signaling can be transmitted via PDCCH and may include terminal-specific DCI or group common DCI. While Signaling Method 2 carries the potential for misunderstanding between the base station and the terminal due to signaling errors, it is characterized by the ability to perform rapid signaling. For example, a 'Transform precoder indicator' field indicating the PDSCH transmission waveform can be added to DCI format 1_0, which represents downlink data scheduling information (DL assignment). If 'Transform precoder indicator' = 0, it means the transform precoder is enabled (i.e., instructing the terminal to apply DFT-S-OFDM as the transmission waveform upon receiving PDSCH), and if 'Transform precoder indicator' = 1, it means the transform precoder is disabled (i.e., instructing the terminal to apply CP-OFDM as the transmission waveform upon receiving PDSCH). According to one embodiment of the present disclosure, there may be cases where the terminal's coverage is not satisfied because the upper layer signaling instructs the terminal whether to apply transform precoding is slow compared to the speed at which the terminal moves from the cell center to the boundary or from the boundary to the center. In such cases, a method of dynamically instructing whether to apply transform precoding through the signaling method 2 may be useful. The embodiments described in this disclosure define a method for indicating a waveform in a mobile communication system that supports multiple waveforms and define the operation of a terminal and a base station. Specifically, this disclosure configures control information related to a waveform, a modulation index, and a target code rate as downlink control information and defines an effective signaling method that minimizes signaling overhead. The following is a description of each specific embodiment. The present invention may include a plurality of embodiments, and while each embodiment may be implemented independently, a plurality of embodiments may also be implemented in combination as long as they are not mutually exclusive. Such combinations include various variations and modifications of the present invention and may be made in various ways depending on technical needs or application environments. Even if a plurality of embodiments use different approaches to achieve the purpose of the invention, they may be used simultaneously or complementarily as long as the embodiments of the present invention are not technically mutually exclusive. Such combinations may be varied depending on technical requirements or specific application cases, and the present invention may encompass various embodiments including such variations and combinations. Although the name of a 5G system is used to describe the embodiments of the present disclosure, this is merely an example and can be understood as a message that includes information or performs the same role as described below. The operation of the system proposed in the present disclosure is explained below through specific embodiments. <1st Embodiment> The first embodiment defines a method for indicating a waveform in a mobile communication system that supports multiple waveforms, and defines the operation of a terminal and a base station. Specifically, it includes a waveform indicator as downlink control information and defines an effective signaling method that minimizes signaling overhead. According to the MCS table in mentioned above, the total of 32 table entries are divided by modulation index, and QPSK represents three target code rates (0≤I MSC ≤2, I MSC =27), 16QAM represents three target code rates (3≤I MSC ≤5, I MSC =28), 64QAM represents 9 target code rates (6≤I MSC ≤14, I MSC =29), 256QAM represents 8 target code rates (15≤I MSC ≤22, I MSC =30), 1024QAM can represent 4 target code rates (23≤I MSC ≤26, I MSC =31). In other words, the range of target code rates that can be supported varies greatly depending on the modulation index, and this can lead to a problem where sufficient channel coding gain is not obtained depending on the modulation index. Accordingly, the first embodiment describes a method for configuring control information to represent a modulation index, a target code rate, and a waveform, and for a terminal to acquire the control information and apply it to PDSCH reception. First, a separate target code rate table is defined to ensure that there are sufficient applicable target code rates for each modulation index. At least one of the following methods may be applied. - Method 1: Define a common target code rate table applicable to all modulation indices. In this case, the target code rate index (I RRepresenting ) with R bits, and 2 that can be represented with R bits R You can define target code rate tables. The target code rate values ​​should be between 0 and 1. For example, a target code rate table consisting of 4 bits can be defined as follows. In the table, 'Target Code Rate R x

[1024] ' represents the value obtained by multiplying the target code rate value by 1024. For Method 1, control information regarding the modulation index must be provided to the terminal separately. Compared to Table 9 above, where QPSK modulation can only support 3 target code rate values, Table 10 allows for the common support of 16 target code rate values ​​for all modulation methods. Method 1 is not limited to QPSK, 16QAM, 64QAM, 256QAM, and 1024QAM and can be used universally. For example, it can be applied without restriction even in the case of 1024QAM or pi / 2 BPSK. - Method 2: Define a separate target code rate table so that there are sufficient applicable target code rates for each modulation index. In this case, a suitable target code rate value can be specified for each modulation index. For Method 2, control information regarding the modulation index must be provided to the terminal separately. For example, a target code rate table consisting of 3 bits can be defined as follows. Method 2 is not limited to QPSK, 16QAM, 64QAM, 256QAM, and 1024QAM but can be used universally. For example, even in the case of 1024QAM or pi / 2 BPSK, the target code rate to be applied to the corresponding modulation method can be specified and utilized. Next, a modulation index indicator (I) for indicating the modulation index. M) can be defined separately. For example, a modulation index indicator represented by 3 bits is the modulation index (Q m ) can be represented as shown in the following table. In the example of , I, where the modulation index is undefined M = 5, I M = 6, I M = 7 can be used to represent modulation indices that may be introduced later, such as 1024QAM or pi / 2 BPSK. Next, the waveform indicator (I WF ) can be defined separately. For example, as shown in the following , it can be indicated whether the waveform applied to PDSCH with 1 bit is CP-OFDM or DFT-S-OFDM. According to the first embodiment, the base station uses the target code rate index (I) as control information constituting the DCI that schedules the PDSCH. R ), modulation index indicator (I M ), waveform indicator (I WF Signaling to the terminal including ). The target code rate table may use a table agreed upon in advance between the terminal and the base station, or the base station may specify and inform the terminal. FIG. 7 is a diagram illustrating an example of a transmission waveform modification according to an embodiment of the present disclosure. Specifically, FIG. 7 is a block diagram illustrating a concept in which a terminal determines a target code rate, a modulation scheme, and a waveform from base station signaling. Referring to FIG. 7, the terminal obtains a target code rate index (I) from the base station's scheduling DCI. R ), modulation index indicator (I M ), waveform indicator (I WFEach is obtained, and the target code rate, modulation method, and waveform are determined by referring to the code rate table. In the example of FIG. 7, the target code rate index (I R ) is N2 bits, modulation index indicator (I M ) is N1 bit, waveform indicator (I WF ) indicates that it is N3 bits. FIG. 8 is a diagram illustrating an example of terminal operation when a transmission waveform is changed according to an embodiment of the present disclosure. Referring to FIG. 8, in one example, a base station I M = 0, I R =3, I MWF Assume the case where = 1 is signaled to the terminal. Referring to FIG. 8, in step 801, the terminal signals I obtained by referring to the above M From = 0, Q m It can be determined that = 2. Subsequently, in step 802, the terminal Q m By referring to the target code rate table for QPSK, which is the target code rate table corresponding to = 2, I within that table R The target code rate (803) corresponding to =3 can be determined. And the terminal I according to the above MWF From = 1, it can be determined that CP-OFDM is applied to the waveform. Although the names of 5G systems have been used to describe the embodiments of the present disclosure, the names described above are merely examples and can be understood as messages that include information or perform the same role as described above. <Second Embodiment> A second embodiment defines a method for indicating a waveform in a mobile communication system that supports multiple waveforms, and defines the operation of a terminal and a base station. Specifically, in the second embodiment, the base station mutually links a modulation index and a waveform to generate a single indicator, and a target code rate index (IR It signals to the terminal by including it as control information that constitutes the DCI together with ). In environments where DFT-S-OFDM is applied to secure coverage, it is typically a usage environment with a low data rate. Reflecting this characteristic, the use of DFT-S-OFDM may be limited to cases where the modulation index is low. For example, a single indicator I by linking the modulation index and waveform M,WF It can be represented as. Referring to below, 3-bit I M,WF The modulation index and waveform can be indicated together. In this case, 2 ≤ Q m When ≤6, allow selection of the waveform between DFT-S-OFDM and CP-OFDM depending on the situation, and Q m When it is > 6, it indicates that only CP-OFDM is used. According to the second embodiment, the base station uses the modulation index and the waveform joint indicator (I) as control information constituting the DCI that schedules the PDSCH. M,WF ) and target code rate index (I R Signaling to the terminal including ). The target code rate table may use a table agreed upon in advance between the terminal and the base station, or the base station may specify and inform the terminal. FIG. 9 is a diagram illustrating an example of a transmission waveform modification according to an embodiment of the present disclosure. Specifically, FIG. 9 is a block diagram illustrating a concept in which a terminal determines a target code rate, a modulation scheme, and a waveform from base station signaling. Referring to FIG. 9, the terminal obtains a modulation index and a waveform joint indicator (I) from the base station's scheduling DCI. M,WF ) and target code rate index (I REach is obtained, and the target code rate, modulation scheme, and waveform are determined by referring to the code rate table. In the example of FIG. 9, the modulation index and the waveform co-indicator (I M,WF ) is the M1 bit, target code rate index (I R ) indicates that it is an M2 bit. FIG. 10 is a diagram illustrating an example of terminal operation when a transmission waveform is changed according to an embodiment of the present disclosure. Referring to FIG. 10, in one example, a base station I M,WF = 0, I R Assume the case where =3 is signaled to the terminal. In step 1001, the terminal obtains the signaling I by referring to the above . M,WF From = 0, Q m = 2, the waveform can be determined to be DFT-S-OFDM. Subsequently, at step 1002, the terminal Q m By referring to the target code rate table for QPSK, which is the target code rate table corresponding to = 2, within that table I R The target code rate (1003) corresponding to =3 can be determined. Although the names of 5G systems have been used to describe the embodiments of the present disclosure, the names described above are merely examples and can be understood as messages that include information or perform the same role as described above. <Third Embodiment> A third embodiment defines a method for indicating a waveform in a mobile communication system that supports multiple waveforms, and defines the operation of a terminal and a base station. Specifically, in the third embodiment, a base station mutually links a target code rate and a waveform to generate a single indicator, and a modulation index indicator (I M It can be signaled to the terminal by including it as control information that constitutes the DCI together with ). In an environment where DFT-S-OFDM is applied to secure coverage, it is typically a low-data-rate usage environment. Conversely, in an environment where CP-OFDM is applied for high frequency efficiency, it is likely a high-data-rate usage environment. Reflecting these characteristics, the use of DFT-S-OFDM can be limited to cases where the target code rate is low, and the use of CP-OFDM can be limited to cases where the target code rate is high. For example, associating the target code rate and waveform with a single indicator I R,WF It can be represented as. Referring to below, 4-bit I R,WF You can specify the target code rate and waveform together. In this case, 0 ≤ I R,WF When ≤3, use DFT-S-OFDM for the waveform, and I R,WF When > 3, it indicates that CP-OFDM is used. As an example of one embodiment, I R,WF If ≤ X, use DFT-S-OFDM, and I R,WF If > X, CP-OFDM is used. In this case, X can be set by the base station and signaled to the terminal. In another embodiment, if the target code rate ≤ Y, DFT-S-OFDM is used, and if the target code rate > Y, CP-OFDM is used. In this case, Y can be set by the base station and signaled to the terminal. According to the third embodiment, the base station uses the target code rate and the waveform co-indicator (I) as control information constituting the DCI that schedules the PDSCH. R,WF ) and modulation index indicator (I M Signaling to the terminal including ). The target code rate table may use a table agreed upon in advance between the terminal and the base station, or the base station may specify and inform the terminal. FIG. 11 is a diagram illustrating an example of a transmission waveform modification according to an embodiment of the present disclosure. Specifically, FIG. 11 is a block diagram illustrating a concept in which a terminal determines a target code rate, a modulation scheme, and a waveform from base station signaling. Referring to FIG. 11, the terminal determines the target code rate and a waveform joint indicator (I) from the base station's scheduling DCI. R,WF ) and modulation index indicator (I M Each of the ) is obtained, and by referring to the code rate table, the target code rate, modulation method, and waveform can be determined. In an example of FIG. 11, the target code rate and waveform joint indicator (I R,WF ) is the L2 bit, modulation index indicator (I M ) can indicate that it is the L1 bit. FIG. 12 is a diagram illustrating an example of terminal operation when a transmission waveform is changed according to an embodiment of the present disclosure. Referring to FIG. 12, in one example, a base station I R,WF = 3, I M Assume the case where =0 is signaled to the terminal. In step 1201, the terminal is I M From =0, Q m It can determine =0. Subsequently, at step 1202, the terminal Q m Signaling I obtained by referring to the target code rate table for QPSK, which is the target code rate table corresponding to = 2 (e.g., by referring to above). R,WF From = 3, it is determined that R = 0.2789 (1203), and the waveform can be determined to be DFT-S-OFDM (1204). Although the names of 5G systems have been used to describe the embodiments of the present disclosure, the names described above are merely examples and can be understood as messages that include information or perform the same role as described above. <Fourth Embodiment> In the fourth embodiment, an example of a terminal procedure and a base station procedure according to a preferred embodiment of the present invention is described. The terminal procedure and the base station procedure of the fourth embodiment may be performed in combination with at least one of the first to third embodiments. FIG. 13 is a diagram illustrating the operation of a terminal according to one embodiment of the present disclosure. Specifically, FIG. 13 is a flowchart relating to a procedure in which a terminal performs an operation in accordance with a base station instruction when a base station instructs a change in a PDSCH transmission waveform. Referring to FIG. 13, in step 1301, the terminal may report UE capability information to the base station, including the ability to support the change in the PDSCH transmission waveform when the base station instructs the terminal to do so. In step 1302, the terminal may receive scheduling information for scheduling the PDSCH from the base station via the PDSCH. The scheduling information for scheduling the PDSCH received by the terminal from the base station may include control information that instructs a change in the terminal's PDSCH transmission waveform. The specific method follows the embodiments described above. In step 1303, the terminal can receive PDSCH from the base station according to the scheduling information. It is also possible to carry out the present disclosure by omitting the steps described with respect to FIG. 13, changing the order, or adding steps that are not described. More specific details regarding the terminal operation according to one embodiment of the disclosure illustrated in FIG. 13 may be referenced to the description of one embodiment of the present disclosure described above. FIG. 14 is a diagram illustrating the operation of a base station according to one embodiment of the present disclosure. Specifically, FIG. 14 is a flowchart relating to a procedure in which a base station instructs a terminal to change a PDSCH transmission waveform and performs a related operation. Referring to Fig. 14, in step 1401, the base station may request the terminal to transmit UE capability information. That is, the base station may request the terminal to report the terminal's ability to support changes in the PDSCH transmission waveform. In step 1402, the base station can obtain UE capability information from the terminal, including the ability to support PDSCH transmission waveform change. Subsequently, in step 1403, the base station may transmit scheduling information to the terminal for scheduling the PDSCH. According to the above-described embodiment, the scheduling information for scheduling the PDSCH transmitted from the base station to the terminal may include control information instructing a change in the terminal's PDSCH transmission waveform, and the specific method follows the above-described embodiments. The base station may determine the PDSCH transmission waveform by referring to the CSI report received from the terminal. It is also possible to carry out the present disclosure by omitting the steps described with respect to FIG. 14, changing the order, or adding steps that are not described. More specific details regarding the base station operation according to one embodiment of the disclosure illustrated in FIG. 14 may be referenced to the description of one embodiment of the present disclosure described above. The above-described flowchart illustrates an exemplary method that may be implemented in accordance with the principles of the present disclosure, and various modifications may be made to the method illustrated in the flowchart in this specification. For example, although illustrated as a series of steps, the various steps in each figure may overlap, occur in parallel, occur in a different order, or occur multiple times. In other examples, steps may be omitted or replaced with other steps. In addition, the method described in FIG. 13 and FIG. 14 may be performed in combination with at least one of the first to third embodiments. The fourth embodiment is capable of various modifications. For example, a procedure that omits the step of the terminal reporting UE capability to the base station is possible. For example, a procedure that omits the step of the base station requesting UE capability from the terminal is also possible. For example, it can be applied as a procedure that changes the transmission waveform of the PUSCH transmitted by the terminal to the base station. FIG. 15 is a drawing showing an example of a transceiver device within a terminal in a wireless communication system according to an embodiment of the present disclosure. For convenience of explanation, devices not directly related to the present disclosure may be omitted from illustration and description. Referring to FIG. 15, the terminal may be composed of a transmitter (1504) consisting of an uplink transmission processing (UL Tx processing) block (1501), a multiplexer (1502), and a transmission RF block (1503), a receiver (1508) consisting of a downlink reception processing (DL Rx processing) block (1505), a demultiplexer (1506), and a reception RF block (1507), and a control unit (1509). As described above, the control unit (1509) can control each of the constituent blocks of the receiver (1508) for receiving a data channel or control channel transmitted by the base station and each of the constituent blocks of the transmitter (1504) for transmitting an uplink signal. In the transmission unit (1504) of the terminal, the uplink transmission processing block (1501) can generate a signal to be transmitted by performing processes such as channel coding and modulation. The signal generated in the uplink transmission processing block (1501) can be multiplexed with other uplink signals by a multiplexer (1502), then processed by a transmission RF block (1503), and then transmitted to a base station. The receiving unit (1508) of the terminal can demultiplex a signal received from a base station and distribute it to each downlink receiving processing block. The downlink receiving processing block (1505) can obtain control information or data transmitted by the base station by performing processes such as demodulation and channel decoding on the downlink signal of the base station. The receiving unit (1508) of the terminal can apply the output result of the downlink receiving processing block to the control unit (1509) to support the operation of the control unit (1509). FIG. 16 is a block diagram illustrating the structure of a terminal according to one embodiment of the present disclosure. As illustrated in FIG. 16, the terminal of the present disclosure may include a processor (1630), a transceiver (1610), and a memory (1620). 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 those described above. Furthermore, the processor (1630), the transceiver (1610), and the memory (1620) may be implemented in the form of a single chip. According to one embodiment, the transceiver (1610) of FIG. 16 may include the transceiver (1504) and the receiver (1508) of FIG. 15. Additionally, the processor (1630) of FIG. 16 may include the control unit (1509) of FIG. 15. According to one embodiment, the processor (1630) can control a series of processes that allow the terminal to operate according to the embodiments of the present disclosure described above. For example, according to the embodiments of the present disclosure, the components of the terminal can be controlled to perform a transmission and reception method of the terminal in accordance with a PDSCH transmission waveform change instruction of the base station. The processor (1630) may be one or a plurality of processors, and the processor (1630) can perform a transmission and reception operation of the terminal in a wireless communication system applying the operation of the present disclosure described above by executing a program stored in memory (1620). The transceiver (1610) can transmit and receive signals with a base station. The signals transmitted and received with the base station may include control information and data. The transceiver (1610) 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 the frequency. However, this is merely an example of the transceiver (1610), and the components of the transceiver (1610) are not limited to an RF transmitter and an RF receiver. Additionally, the transceiver (1610) can receive a signal through a wireless channel and output it to a processor (1630), and transmit the signal output from the processor (1630) through a wireless channel. According to one embodiment, the memory (1620) may store programs and data necessary for the operation of the terminal. Additionally, the memory (1620) may store control information or data included in signals transmitted and received by the terminal. The memory (1620) may be composed of a storage medium or a combination of storage media such as ROM, RAM, hard disk, CD-ROM, and DVD. Additionally, the memory (1620) may be a plurality of. According to one embodiment, the memory (1620) may store a program for performing the transmission and reception operation of the terminal by the frequency instruction of the base station, which is one of the embodiments of the present disclosure described above. FIG. 17 is a block diagram illustrating the structure of a base station according to one embodiment of the present disclosure. As illustrated in FIG. 17, the base station of the present disclosure may include a processor (1730), a transceiver (1710), and a memory (1720). 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. In addition, the processor (1730), the transceiver (1710), and the memory (1720) may be implemented in the form of a single chip. The processor (1730) can control a series of processes to enable the base station to operate according to the embodiments of the present disclosure described above. For example, according to the embodiments of the present disclosure, the components of the base station can be controlled to perform a method of scheduling a terminal according to the PDSCH transmission waveform change instructions of the base station. The processor (1730) may be one or a plurality of processors, and the processor (1730) can perform a method of scheduling a terminal according to the frequency instructions of the base station of the present disclosure described above by executing a program stored in memory (1720). The transceiver (1710) can transmit and receive signals with a terminal. The signals transmitted and received with the terminal may include control information and data. The transceiver (1710) 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 the frequency. However, this is merely an example of the transceiver (1710), and the components of the transceiver (1710) are not limited to an RF transmitter and an RF receiver. Additionally, the transceiver (1710) can receive a signal through a wireless channel and output it to a processor (1730), and transmit the signal output from the processor (1730) through a wireless channel. According to one embodiment, the memory (1720) may store programs and data necessary for the operation of the base station. Additionally, the memory (1720) may store control information or data included in signals transmitted and received by the base station. The memory (1720) may be composed of a storage medium or a combination of storage media such as ROM, RAM, hard disk, CD-ROM, and DVD. Additionally, there may be multiple memory (1720). According to one embodiment, the memory (1720) may store a program for performing a method of scheduling a terminal according to a PDSCH transmission waveform change instruction of the base station, which is an embodiment of the present disclosure described above. In the specific embodiments of the present disclosure described above, the components included in the present disclosure 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, and even if a component is expressed in the singular form, it may be composed of a plural form. Meanwhile, the present specification and drawings disclose preferred embodiments of the present disclosure. Although specific terms have been used, they are used merely in a general sense to facilitate the explanation of the technical content of the present disclosure and to aid in understanding the invention, and are not intended to limit the scope of the present disclosure. It is obvious to those skilled in the art that, in addition to the embodiments disclosed herein, 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, the first, second, and third embodiments may be implemented independently, or at least one of the embodiments may be combined and implemented. Meanwhile, although specific embodiments have been described in the detailed description of the present disclosure, it is understood that various modifications are possible within the scope of the present disclosure. Therefore, the scope of the present disclosure should not be limited to the described embodiments, but should be defined by the claims set forth below as well as equivalents thereof.

Claims

1. A method performed by a terminal (user equipment) in a wireless communication system, A step of receiving a message requesting terminal capability information from a base station; A step of transmitting terminal capability information, including support information for the waveform of the terminal's PDSCH (physical downlink shared channel), to the base station; A step of receiving DCI (downlink control information) containing information for scheduling PDSCH from the above base station; A step of identifying the waveform of a PDSCH to be scheduled based on information indicating the waveform of the PDSCH included in the information for scheduling the PDSCH; and A method comprising the step of receiving the PDSCH from the base station based on the waveform of the identified PDSCH.

2. In claim 1, the information indicating the waveform of the PDSCH is, A method comprising an indicator indicating the waveform of the PDSCH being scheduled and information indicating the target code rate for each modulation order.

3. In claim 1, the information indicating the waveform of the PDSCH is, A method comprising an indicator indicating an association between a modulation order and a waveform of the scheduled PDSCH, and indicator information indicating a target code rate.

4. In claim 1, the information indicating the waveform of the PDSCH is, A method comprising an indicator indicating a correlation between a target code rate and a waveform of the scheduled PDSCH, and an indicator information indicating a modulation order.

5. In a wireless communication system, regarding a terminal (user equipment), At least one transceiver; At least one processor communicatively coupled to the above at least one transceiver; and It includes at least one memory that is communicationally coupled to the above at least one processor and stores instructions, and The above instructions are executed individually or in any combination by the above at least one processor, so that the terminal: Receive a message requesting terminal capability information from a base station, and Transmitting terminal capability information including support information for the waveform of the terminal's PDSCH (physical downlink shared channel) to the above base station, Receive DCI (downlink control information) containing information for scheduling PDSCH from the above base station, and Based on information indicating the waveform of the PDSCH included in the information for scheduling the PDSCH, the waveform of the PDSCH to be scheduled is identified, and A terminal configured to receive the PDSCH from the base station based on the waveform of the identified PDSCH.

6. In claim 5, the information indicating the waveform of the PDSCH is, A terminal comprising an indicator indicating the waveform of the PDSCH scheduled above and information indicating a target code rate for each modulation order.

7. In claim 5, the information indicating the waveform of the PDSCH is, A terminal comprising an indicator indicating an association between a modulation order and a waveform of the scheduled PDSCH, and indicator information indicating a target code rate.

8. In claim 5, the information indicating the waveform of the PDSCH is, A terminal comprising an indicator indicating a correlation between a target code rate and the waveform of the scheduled PDSCH, and an indicator information indicating a modulation order.

9. A method performed by a base station in a wireless communication system, A step of transmitting a message requesting terminal capability information to a terminal (user equipment); A step of receiving terminal capability information from the terminal, including support information for the waveform of the terminal's PDSCH (physical downlink shared channel); The step of transmitting downlink control information (DCI) including information for scheduling PDSCH to the above terminal; and A method comprising the step of transmitting the PDSCH to the terminal.

10. In claim 9, the information indicating the waveform of the PDSCH is, A method comprising an indicator indicating the waveform of the PDSCH being scheduled and information indicating the target code rate for each modulation order.

11. In claim 9, the information indicating the waveform of the PDSCH is, A method comprising an indicator indicating an association between a modulation order and a waveform of the scheduled PDSCH, and indicator information indicating a target code rate.

12. In claim 9, the information indicating the waveform of the PDSCH is, A method comprising an indicator indicating a correlation between a target code rate and a waveform of the scheduled PDSCH, and an indicator information indicating a modulation order.

13. In a base station of a wireless communication system, At least one transceiver; At least one processor communicatively coupled to the above at least one transceiver; and It includes at least one memory that is communicationally coupled to the above at least one processor and stores instructions, and The above instructions are executed individually or in any combination by the above at least one processor, so that the base station: Send a message requesting terminal capability information to the terminal (user equipment), and From the above terminal, terminal capability information including support information for the waveform of the terminal's PDSCH (physical downlink shared channel) is received, and Transmit downlink control information (DCI) containing information for scheduling PDSCH to the above terminal, and A base station configured to transmit the PDSCH to the terminal.

14. In claim 13, the information indicating the waveform of the PDSCH is, A base station comprising an indicator indicating the waveform of the PDSCH being scheduled and information indicating the target code rate for each modulation order.

15. In claim 13, the information indicating the waveform of the PDSCH is, A base station comprising an indicator indicating the association between the modulation order and the waveform of the scheduled PDSCH, and indicator information indicating the target code rate.

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