Method and device for improving coverage 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. According to an embodiment of the present disclosure, provided is an uplink transmission power control method performed by a terminal in a wireless communication system, the method comprising the steps of: receiving an RRC message from a base station; determining an upper limit and a lower limit of a maximum output power for uplink transmission of the terminal, on the basis of the RRC message, wherein the upper limit and the lower limit of the maximum output power are determined to have a negative correlation with an uplink ratio according to TDD configuration information; determining a maximum transmission power for uplink transmission of the terminal within a range of the determined upper limit and lower limit of the maximum output power; and transmitting a signal to the base station on the basis of the maximum transmission power.

Description

Method and device for improving coverage in a wireless communication system

[0001] The present disclosure relates to a wireless communication system or a mobile communication system. Specifically, it relates to a method and apparatus for improving coverage in a wireless communication system.

[0002] 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 referred to as "Beyond 5G" systems.

[0003] In the 6G communication system predicted to be realized around 2030, the maximum transmission speed is tera (i.e., 1,000 gigabit) bps, 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.

[0004] To achieve such high data transmission speeds and ultra-low latency, 6G communication systems are being considered for implementation in the terahertz band (e.g., the 95 GHz to 3 terahertz (3 THz) band). In the terahertz band, due to more severe path loss and atmospheric absorption compared to the millimeter wave (mmWave) band introduced in 5G, the importance of technology capable of guaranteeing signal reach, or coverage, is expected to increase. As key technologies to ensure coverage, radio frequency (RF) devices, antennas, new waveforms that offer better coverage than orthogonal frequency division multiplexing (OFDM), 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 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 coverage of terahertz band signals.

[0005] 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.

[0006] 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.

[0007] As a result of the aforementioned developments and advancements in wireless communication systems, it has become possible to provide various services, and thus measures are required to facilitate the smooth provision of these services.

[0008] The objective of the present invention is to provide a method and apparatus for maximizing uplink coverage by dynamically adjusting the maximum transmission power of a terminal according to the uplink transmission rate in a time division duplex (TDD) system.

[0009] According to one embodiment of the present disclosure for solving the above-mentioned problems, a method for controlling uplink transmission power performed by a terminal of a wireless communication system comprises: receiving an RRC message from a base station; determining an upper and lower limit of maximum output power for uplink transmission of the terminal based on the RRC message, wherein the upper and lower limit of maximum output power are determined to have a negative correlation with an uplink ratio according to TDD setting information; determining a maximum transmission power for uplink transmission of the terminal within the range of the determined upper and lower limit of maximum output power; and transmitting a signal to the base station based on the maximum transmission power.

[0010] Meanwhile, according to another embodiment of the present disclosure, an uplink transmission power control method performed by a base station of a wireless communication system comprises: a step of transmitting an RRC message to a terminal; and a step of receiving a signal from the terminal that transmits a maximum transmission power as an upper limit, which is determined within a range of upper and lower limits of the maximum output power for the uplink transmission of the terminal, wherein the upper and lower limits of the maximum output power are determined to have a negative correlation with the uplink ratio according to TDD setting information.

[0011] Meanwhile, according to another embodiment of the present disclosure, a terminal of a wireless communication system is disclosed, comprising: at least one transceiver; at least one processor connected to the at least one transceiver so as to be communicable with the at least one transceiver; and a memory storing instructions connected to the at least one processor so as to be communicable with the at least one processor, which can be executed individually or in any combination thereof, such that the terminal receives an RRC message from a base station; determines an upper and lower limit of maximum output power for uplink transmission of the terminal based on the RRC message, wherein the upper and lower limit of maximum output power are determined to have a negative correlation with an uplink ratio according to TDD setting information; determines a maximum transmission power for uplink transmission of the terminal within the range of the determined upper and lower limit of maximum output power; and transmits a signal to the base station based on the maximum transmission power.

[0012] Meanwhile, according to another embodiment of the present disclosure, a base station of a wireless communication system comprises: at least one transceiver; at least one processor connected to communicate with the at least one transceiver; and a memory connected to communicate with the at least one processor and capable of executing the at least one processor individually or in any combination thereof, the memory storing instructions for the base station to perform the steps of transmitting an RRC message to a terminal and receiving a signal transmitted from the terminal with a maximum transmission power determined within the range of upper and lower limits of the maximum output power for the uplink transmission of the terminal, wherein the upper and lower limits of the maximum output power are determined to have a negative correlation with the uplink ratio according to TDD setting information.

[0013] According to one embodiment of the present invention, as the TDD uplink ratio decreases, higher instantaneous transmission power is allowed, thereby satisfying the defined average power limit while effectively improving uplink coverage for cell boundary users.

[0014] The effects obtainable in the present disclosure are not limited to those mentioned in the various embodiments, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure pertains from the description below.

[0015] Figure 1 is a graph showing an example of the input-output characteristics of a power amplifier.

[0016] Figure 2 is a graph showing the PA output waveform over time when the average transmission power of the terminal is set to a level corresponding to point (A) within the linear region of Figure 1.

[0017] Figure 3 is a diagram showing the problems that may occur when the average transmission power of the terminal is increased to the level of point (B), which corresponds to the non-linear region of Figure 1.

[0018] FIG. 4 is a graph showing the maximum output power of a terminal that can be set based on the TDD uplink ratio according to one embodiment of the present disclosure.

[0019] FIG. 5 is a flowchart illustrating the operation of determining the upper and lower limits of the maximum transmission power according to one embodiment of the present disclosure.

[0020] FIG. 6a is a flowchart illustrating an example of an operation for determining maximum transmission power according to one embodiment of the present disclosure.

[0021] FIG. 6b is a flowchart illustrating another example of an operation for determining maximum transmission power according to one embodiment of the present disclosure.

[0022] FIG. 6c is a flowchart illustrating another example of an operation for determining maximum transmission power according to one embodiment of the present disclosure.

[0023] FIG. 7 is a flowchart illustrating another example of an operation for determining maximum transmission power according to one embodiment of the present disclosure.

[0024] FIG. 8 is a flowchart illustrating another example of an operation for determining maximum transmission power according to one embodiment of the present disclosure.

[0025] FIG. 9 is a flowchart illustrating the process of a terminal determining the maximum allowable transmission power according to one embodiment of the present disclosure.

[0026] FIG. 10 is a flowchart illustrating the operation of a terminal according to one embodiment of the present disclosure.

[0027] FIG. 11 is a flowchart specifically illustrating one example of step S1002 of FIG. 10.

[0028] FIG. 12 is a flowchart specifically illustrating one example of step S1002 of FIG. 10.

[0029] FIG. 13 is a flowchart specifically illustrating an example of step S1002 of FIG. 10.

[0030] FIG. 14 is a flowchart illustrating the operation of a terminal according to one embodiment of the present disclosure.

[0031] FIG. 15 is a flowchart illustrating the operation of a base station according to one embodiment of the present disclosure.

[0032] FIG. 16 is a flowchart illustrating the operation of a base station according to one embodiment of the present disclosure.

[0033] FIG. 17 is a block diagram of a terminal or user equipment according to one embodiment of the present disclosure.

[0034] FIG. 18 is a block diagram of a base station according to one embodiment of the present disclosure.

[0035] FIG. 19 is a block diagram of a network entity performing a network function according to one embodiment of the present disclosure.

[0036] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the attached drawings.

[0037] In describing the embodiments, technical details that are well known in the art to which this disclosure belongs and are not directly related to this disclosure are omitted. This is intended to convey the essence of this disclosure more clearly without obscuring it by omitting unnecessary explanations.

[0038] For the same reason, some components in the attached drawings have been exaggerated, omitted, or schematically depicted. Additionally, the size of each component does not entirely reflect its actual dimensions. Identical or corresponding components in each drawing have been assigned the same or different reference numbers.

[0039] The advantages and features of the present disclosure, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure is complete and to fully inform those skilled in the art of the scope of the disclosure, and the present disclosure is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components. Furthermore, in describing the present disclosure, if it is determined that a detailed description of a related function or configuration might unnecessarily obscure the essence of the present disclosure, such detailed description is omitted. Additionally, the terms described below are defined considering their functions in the present disclosure, and these may vary depending on the intentions or conventions of the user or operator. Therefore, their definitions should be based on the content throughout the specification.

[0040] In the present disclosure, it will be understood that each block of the process flow diagrams and combinations of the flow diagrams may be performed based on computer program instructions. Since these computer program instructions may be optionally loaded into at least one processor of a general-purpose computer, a computer for special purposes, or other programmable data processing equipment, the instructions performed through any one or any combination of at least one processor of the computer or other programmable data processing equipment create means for performing the functions described in the flow diagram block(s). Since these computer program instructions may 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 functions in a specific manner, the instructions stored in computer-available or computer-readable memory may also produce a manufactured item containing means of instruction for performing the functions 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).

[0041] Additionally, each block may represent a module, segment, or part of code containing one or more executable instructions for executing a specified 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 (or functions) described in succession may actually be executed substantially simultaneously, or the blocks may sometimes be executed in reverse order according to the corresponding function.

[0042] As used in the embodiments of the present disclosure, the term “part” refers to a software or hardware component, such as a field programmable gate array (FPGA) or an application-specific integrated circuit (ASIC), and the “part” performs certain roles. However, the term including “part” is not limited to software or hardware. The “part” may be configured to reside in an addressable storage medium or may be configured to run on one or more processors. Thus, by 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 (central processing units) within the device or secure multimedia card. Also, in the embodiments, 'parts' may include one or more processors.

[0043] As stated above, it should be noted that the blocks of each flowchart and combinations of flowcharts described in this disclosure may be executed by one or more computer programs including instructions. The entirety of one or more computer programs may be stored in a single memory device, or one or more computer programs may be divided into different parts and stored across multiple memory devices.

[0044] Additionally, any / any function or operation described in this disclosure may be processed by a single processor or a combination of processors. The single processor or combination of processors is a circuitry that performs processing and may include an application processor (AP, e.g., a central processing unit (CPU)), a communication processor (CP, e.g., a modem), a graphics processing unit (GPU), a neural network processing unit (NPU) (e.g., an artificial intelligence (AI) chip), a Wi-Fi chip, a Bluetooth® chip, a global positioning system (GPS) chip, a near-field communication (NFC) chip, a connectivity chip, a sensor controller, a touch controller, a fingerprint sensor controller, a display driver integrated circuit (IC), an audio codec (CODEC) chip, a universal serial bus (USB) controller, a camera controller, an image processing IC, a microprocessor unit (MPU), a system-on-chip (SoC), an IC, or similar circuitry.

[0045] Additionally, it should be noted that various embodiments in the claims and description of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

[0046] Such software may be stored on a non-transitory computer-readable storage medium. A non-transitory computer-readable storage medium stores one or more computer programs (software modules), and said one or more computer programs include computer-executable instructions that operate an electronic device to perform a method according to the present disclosure when executed alone or collectively by one or more processors of an electronic device.

[0047] The software may be stored in a transient or non-transient storage device, for example, in the form of read-only memory (ROM) (whether or not it is erasable or rewritable), or random access memory (RAM), memory chips, devices, or integrated circuits (ICs). Additionally, the software may be stored in the form of an optically or magnetically readable medium, for example, a compact disc (CD), a digital multifunction disc (DVD), a magnetic disc, or a magnetic tape. It should be understood that the storage device and the storage medium are examples of non-transient machine-readable storage media suitable for storing programs for implementing various embodiments of the present disclosure. Accordingly, various embodiments of the present disclosure may provide a program containing code for implementing a device or method according to any one of the claims of this specification, and a non-transient machine-readable storage medium storing such program.

[0048] In the following disclosure, determining the priority between A and B may be referred to in various ways, such as selecting the one with the higher priority according to a predetermined priority rule and performing the corresponding action, or omitting or dropping the action for the one with the lower priority.

[0049] Hereinafter, 'A or B' as described in the present disclosure may be understood as 'A and / or B', which may be understood as including 'A', or 'B', or 'A and B'.

[0050] Additionally, 'at least one of A, B, and C' described in the present disclosure may be understood to include 'A', or 'B', or 'C', or 'any combination of A, B, and C'.

[0051] Additionally, 'at least one of A, B, or C' described in the present disclosure may be understood to include 'A', or 'B', or 'C', or 'any combination of A, B, and C'.

[0052] Additionally, 'A / B' as described in the present disclosure may be understood as 'A and / or B', which may be understood as including 'A', or 'B', or 'A and B'.

[0053] Additionally, 'A, B' described in the present disclosure may be understood as 'A and / or B', which may be understood as including 'A', or 'B', or 'A and B'.

[0054] Additionally, 'A and B' described in the present disclosure may be understood as 'A and / or B', which may be understood as including 'A', or 'B', or 'A and B'.

[0055] Furthermore, the phrase "when conditions A and B are satisfied" as described in the present disclosure is not necessarily limited to cases where both conditions A and B are satisfied, but may be understood to include cases where either condition A or condition B is satisfied individually, cases where both conditions A and B are satisfied, or cases where one or more additional conditions are satisfied together.

[0056] Furthermore, throughout this specification, ordinal terms (and similar modifiers) such as 'first', 'second', 'third', etc. are used solely for the purpose of distinguishing various instances, occurrences, configurations, messages, stages, or aspects of elements, operations, or information, as described below. Unless clearly required otherwise by the context, the use of such ordinal terms does not require that the elements, operations, or information distinguished by such terms be structurally different, numerically distinct, or essentially different. For example, 'first signal' and 'second signal' may represent instances of the same signal transmitted at different times, signals containing the same core information even with some variations, or signals having different content or characteristics depending on the specific context. Similarly, 'first value' and 'second value' may represent the same magnitude measured or applied in different situations, or may represent different magnitudes. Such interpretation must be determined based on the specific technical context, function, and relationship described in the relevant parts of the specification and claims.

[0057] Furthermore, although terms such as "first," "second," etc., as used in this disclosure are used for various elements such as information, objects, actions, and sequences, they are not intended to limit such elements to a specific order. These terms may be understood merely as distinguishing one element from another. For example, a first element may be referred to as a second element, and likewise, a second element may be referred to as a first element.

[0058] Additionally, the terms 'first' and 'second' described in this disclosure may be understood to refer to identical or different elements. For example, if an element is information, the first information and the second information may both be information, and depending on the case, they may be the same information or different information.

[0059] Furthermore, the expressions 'if' and 'in case that' described in this disclosure or claims may be interpreted, depending on the context, as meaning 'when or upon,' 'in response to,' 'based on,' or 'according to,' and these expressions may be used interchangeably. In addition, other expressions having substantially the same meaning may be used as substitutes, provided that they do not impair the technical features of this disclosure.

[0060] Additionally, the term "not perform" as used in this disclosure or claims may be understood, depending on the context, to mean to omit or skip the corresponding step. Such a term may be replaced with other terms having the same or substantially similar meaning.

[0061] Additionally, the phrase "transmitting a message containing A and B" as described in this specification may be interpreted to include not only (i) cases where A and B are transmitted as a single message, but also (ii) cases where A and B are transmitted individually through multiple messages (e.g., transmitting a first message containing A and a second message containing B). This interpretation may also apply to cases where messages containing two or more items, such as A, B, and C, are transmitted together or individually.

[0062] In addition, 'transmitting a message containing A and transmitting a message containing B' can also be interpreted as transmitting a single message containing A and B.

[0063] In the specific embodiments of the present disclosure described below, terms or components included in the disclosure will be expressed in the singular or plural form according to the specific embodiments presented. However, the singular or plural expression is selected to suit the circumstances 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 in the singular form, and even if a component is expressed in the singular form, it may be composed in the plural form.

[0064] The drawings or flowcharts described below illustrate exemplary methods that may be implemented in accordance with the principles of the present disclosure, and various modifications may be made to the methods illustrated in the flowcharts of the present disclosure. For example, although illustrated as a series of steps, the various steps of each drawing or flowchart may overlap, occur in parallel, occur in a different order, or occur multiple times. In other examples, any step may be omitted or replaced with another step.

[0065] The methods and devices proposed in the embodiments of the present disclosure below are not limited to each embodiment and may be utilized as a combination of all or part of the embodiments proposed in the disclosure. Accordingly, the embodiments of the present disclosure may be applied with some modifications within the scope that does not deviate significantly from the scope of the present disclosure, at the judgment of a person skilled in the art.

[0066] In this case, any wording mentioned in different embodiments may be used interchangeably, combined, or substituted if the concepts correspond. For example, regarding the same or corresponding concepts, even if the expression 'A' is used in one embodiment and the expression 'B' is used in another embodiment, they may be understood by interchangeably, substituted, or combined.

[0067] 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. Furthermore, where appropriate, such terms may be replaced with terms defined in the 3GPP (3rd generation partnership project) Technical Specifications (TS).

[0068] Hereinafter, the base station, as the entity performing resource allocation for terminals, may be at least one of gNode B, eNode B, Node B, BS (base station), wireless access unit, base station controller, or a node on a network. Additionally, the base station of the present disclosure may include a structure split into a central unit (CU) and a distributed unit (DU). In such a structure, the CU is responsible for the upper layer of the control and user plane, and the DU is responsible for wireless resource processing of the lower layer. The embodiments of the present disclosure can be equally applied to a 5G base station structure in which functions are separated into the CU and DU as described above.

[0069] The terminal may include a UE (user equipment), MS (mobile station), cellular phone, smartphone, computer, or a multimedia system capable of performing communication functions.

[0070] In the present disclosure, a downlink (DL) refers to a wireless transmission path of a signal transmitted by a base station to a terminal, and an uplink (UL) refers to a wireless transmission path of a signal transmitted by a terminal to a base station.

[0071] In addition, while a 5th generation mobile communication system (5G, new radio, NR) and a 6th generation mobile communication system (6G) may be described below as examples, embodiments of the present disclosure may also be applied to other communication systems having similar technical backgrounds or channel types. For example, new advanced mobile communication systems developed after 5G and 6G may be included therein. Furthermore, the present disclosure may be applied to other communication systems (e.g., Wi-Fi systems) with some modifications made in the judgment of a person with skilled technical knowledge, without significantly departing from the scope of the present disclosure.

[0072] In the following description, the terms "physical channel" and "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."

[0073] In describing the present disclosure below, the term "upper layer signaling" may be a signaling corresponding to at least one or a combination of at least one of MIB (master information block), SIB (system information block), SIB M (M=1, 2, ..), RRC (radio resource control), MAC (medium access control), CE (control element), NAS (non-access stratum) signaling, or application layer messages. The RRC signaling may also be referred to as L3 signaling (layer 3 signaling).

[0074] Additionally, L1 signaling may be a signaling method corresponding to at least one or a combination of at least one of the following: a physical layer channel or signaling of a PDCCH (physical downlink control channel), a DCI (downlink control information), a UE-specific DCI, a group common DCI, a common DCI, a scheduling DCI (e.g., a DCI used for the purpose of scheduling downlink or uplink data), a non-scheduling DCI (e.g., a DCI not used for the purpose of scheduling downlink or uplink data), a PUCCH (physical uplink control channel), or an UCI (uplink control information). The above L1 signaling may also be referred to as physical layer signaling.

[0075] Hereinafter, the expression in the present disclosure or claims that information can be configured from a base station may mean that, depending on the context, a terminal receives said information from a base station through physical layer signaling or upper layer signaling, and such expression may be replaced with other terms having the same or substantially similar meaning.

[0076] Hereinafter, key terms used in this disclosure may be used with the following meanings and are examples to explain the technical concept of this disclosure. Accordingly, the scope of rights of this disclosure is not limited by specific terms or expressions, and expressions having equivalent technical meanings that can be easily substituted by those skilled in the art may also be included within the scope of rights of this disclosure.

[0077] In the present disclosure, the uplink ratio (UL Ratio, The uplink ratio may refer to the ratio of resources allocated to transmitting uplink signals during an arbitrary period. For example, the uplink ratio may refer to the ratio of resources allocated to a terminal to transmit uplink signals out of the total transmission resources (e.g., time, symbol, slot) during a specific observation period (e.g., 10ms or 5ms). The uplink ratio may be determined by TDD configuration information. The uplink ratio may be replaced by various terms such as uplink duty cycle, uplink transmission ratio, uplink symbol ratio, or uplink allocation ratio.

[0078] In the present disclosure, the maximum transmit power is an upper limit of the transmit power that a terminal actually sets to transmit an uplink signal at a specific time (e.g., It may mean ). More specifically, maximum transmit power may mean the maximum output power of the terminal configured for the carrier f of the serving cell c. The maximum transmit power may be determined within the upper and lower limits of the maximum output power described below. Maximum transmit power may be replaced by various terms such as set transmit power, final transmit power, transmit power upper limit, or maximum transmit power.

[0079] In the present disclosure, the upper and lower limits of the maximum output power may refer to the allowable range of the maximum transmission power that the terminal can configure. The upper and lower limits of the maximum output power are and It can be expressed as. The upper and lower limits of the maximum output power are the configured maximum output power range, power limit bounds, It can be replaced with various terms such as range or allowable transmission power range.

[0080] In the present disclosure, This may refer to the maximum allowable transmission power value that the base station sets to the terminal through RRC signaling. can be replaced with various terms such as p-Max, set maximum power, base station configuration maximum power, or maximum allowable power.

[0081] In the present disclosure, a maximum output limit according to the power class ( ) refers to the nominal maximum output power according to the Power Class (PC) of the terminal as defined in the 3GPP standard. The maximum output limit value according to the Power Class is a reference power value predetermined according to the grade of the terminal, and can serve as the basis for various power control calculations proposed in this disclosure. For example, in the case of a Power Class 3 (PC3) terminal It can correspond to 23 dBm. It can be replaced with various terms such as power class reference power, nominal maximum output, reference transmission power, or maximum power per class. This can be determined, for example, based on Table 1 below.

[0082]

[0083] In the present disclosure, the parameter value for controlling the maximum output limit may refer to at least one parameter used to calculate the increased maximum transmit power by reflecting the uplink ratio. The parameter value for controlling the maximum output limit may be replaced with various terms such as power control parameter, power boosting parameter, power adjustment value, or power offset.

[0084] The present disclosure relates to a technology for improving uplink coverage of a terminal (or user equipment, UE). In particular, the present disclosure relates to a method for efficiently controlling the transmit power of a terminal in a time division duplex (TDD) operating environment. A method for controlling the transmit power of a terminal according to one embodiment of the present disclosure may be referred to by various terms such as power boosting, dynamic boosting, or boosting control.

[0085] The operating principle of the present disclosure will be explained in detail below with reference to the attached drawings.

[0086] In mobile communication systems, a terminal's uplink coverage is one of the key factors determining communication quality and service area. For example, terminals located at the cell boundary experience significant path loss to the base station; therefore, if they fail to secure sufficient transmission power, problems such as reduced data transmission rates and communication interruptions may occur.

[0087] One of the primary methods to expand a terminal's uplink coverage is to increase its transmit output. To increase the transmit output, a power amplifier (PA) may be installed at the terminal's transmitter. While the power amplifier is a key component that amplifies the power of the input signal, it does not operate linearly across the entire input range.

[0088] Figure 1 is a graph showing an example of the input-output characteristics of a power amplifier.

[0089] Referring to FIG. 1, the horizontal axis of the graph represents the input power of the power amplifier, and the vertical axis represents the output power. The power amplifier has a linear region in which the output increases linearly up to a certain input power, and a non-linear region in which the output saturates without increasing proportionally for input powers above that level. Point (A) in FIG. 1 represents a typical power level that operates stably within the linear region; for example, in the case of a terminal with a power class (PC) of 3, the maximum transmittable average power within the linear region corresponds to 23 dBm. In contrast, point (B) in FIG. 1 has an input with a higher power level than point (A) to improve coverage, but point (B) corresponds to the non-linear region of the power amplifier, so the output may not increase proportionally relative to the input and may saturate.

[0090] Figure 2 is a graph showing the PA output waveform over time when the average transmission power of the terminal is set to a level corresponding to point (A) within the linear region of Figure 1.

[0091] Figure 2 shows two waveforms having the same average transmission power (P_avg). The waveform indicated by the dotted line is DFT-s-OFDM, which is the standard uplink transmission waveform of 5G NR, and the waveform indicated by the solid line is a DFT-s-OFDM waveform to which FDSS-SE (frequency domain spectrum shaping with spectral extension), a low PAPR (peak-to-average power ratio) technique, is applied. Meanwhile, FDSS-SE is a technique that lowers PAPR by shaping the frequency domain spectrum of a signal to reduce amplitude fluctuations in the time domain. At the average transmission power level corresponding to point (A) in Figure 1, the peak of both waveforms does not reach the non-linear region of the power amplifier. Therefore, at the above average transmission power level, no non-linear distortion occurs regardless of the type of waveform, enabling stable communication.

[0092] Figure 3 is a diagram showing the problems that may occur when the average transmission power of the terminal is increased to the level of point (B), which corresponds to the non-linear region of Figure 1.

[0093] Referring to Fig. 3, in the case of a DFT-s-OFDM waveform, the peak portion of the waveform may encroach upon the nonlinear region of the PA due to the high PAPR characteristic. As the peak portion of the waveform encroaches upon the nonlinear region of the PA as described above, the DFT-s-OFDM waveform may not be usable at point (B), as indicated in the table at the bottom of Fig. 1. Specifically, when the peak portion of the waveform encroaches upon the nonlinear region of the PA, signal distortion is induced, as expressed by the phrase "Distorted by nonlinearity" in Fig. 3, and thus the DFT-s-OFDM waveform may not be usable at point (B). Consequently, if signal distortion occurs, the waveform may not be usable in an actual system as it fails to satisfy the RF requirements stipulated by 3GPP. On the other hand, for waveforms using the low PAPR technique FDSS-SE, the amplitude fluctuation of the waveform is reduced and the PAPR is lowered compared to DFT-s-OFDM waveforms, so most waveforms can still operate in the linear region of PA. Therefore, as shown in the table at the bottom of Figure 1, the waveform using FDSS-SE at point (B) can be used. Consequently, when using a waveform with FDSS-SE applied, distortion caused by PA nonlinearity is suppressed to a level that satisfies 3GPP radio standards, allowing signals to be transmitted at higher power.

[0094] Referring to the above description, it can be seen that to improve terminal coverage, it is necessary to use both higher output power and Low PAPR waveform techniques, rather than simply increasing the output of the PA. Accordingly, to solve the problems of the prior art, the present disclosure proposes a method for determining maximum transmission power by considering the TDD uplink ratio. Specifically, since the terminal performs uplink transmission only during a portion of the total time in a TDD system, by considering the periods without transmission, the output power at the moment of actual transmission can be set higher than the average power limit. The present disclosure proposes a method to effectively improve terminal coverage based on the use of Low PAPR waveforms by utilizing the characteristics of the TDD system.

[0095] According to one embodiment of the present disclosure, for setting a higher maximum transmit power of a terminal, a method may be proposed to set a higher maximum transmit power value as the uplink ratio of the terminal decreases. To set a higher maximum transmit power, a method may be proposed to add a power boosting value to a maximum output limit value set according to the power class of the terminal. The power boosting is a parameter value for adjusting the maximum output limit value, wherein , , or It can be expressed as such. In other words, one embodiment of the present disclosure proposes a method for determining a higher power boosting value as the uplink ratio of the terminal decreases, taking into account that the terminal can instantaneously emit higher power while satisfying a defined average power limit as it transmits for a shorter period of time.

[0096] FIG. 4 is a graph showing the maximum output power of a terminal that can be set based on the TDD uplink ratio according to one embodiment of the present disclosure.

[0097] Referring to FIG. 4, the horizontal axis represents the uplink ratio (UL Ratio), which is the ratio of the time the terminal transmits via the uplink to the total observation time. The uplink ratio can be determined, for example, based on the amount of downlink symbols and the amount of uplink symbols during a specific period. Additionally, the vertical axis represents the maximum transmission power that can be uplinked according to the uplink ratio in decibels (dB). According to the graph in FIG. 4, as the uplink ratio decreases (as the terminal transmits signals via the uplink for only a shorter period of time), the allowable maximum transmission power may increase inversely proportionally. In other words, the uplink ratio and the allowable maximum transmission power may have a negative correlation with each other (for example, when the uplink ratio decreases, the maximum transmission power is determined to increase). The relationship between the uplink ratio and the allowable maximum transmission power can be expressed as shown in Equation 1 below.

[0098]

[0099] In the above mathematical formula 1, represents the reference maximum average power (or maximum output limit) according to the power class of the terminal, and for example, for a power class 3 (PC3) terminal, it may be 23 dBm. represents the uplink ratio of the terminal. This is a margin value to attenuate a portion of the theoretical maximum transmission power value in consideration of the actual operating environment, and can be set to a small value such as 0 or 0.1.

[0100] Referring to the above mathematical formula 1, It can be used to determine the upper and lower limits of the maximum output power of the terminal. This can be defined as a new parameter value for controlling the maximum output limit to maintain compatibility with the existing 3GPP framework. For example, in one embodiment of the present invention, is a power boost difference, which is a parameter value for adjusting the maximum output limit ( ) or power class difference( It can be converted into ).

[0101] As a specific embodiment of the present disclosure, a power class 3 terminal ( = 23 dBm) if uplink transmission is performed only for 10% of the time of a specific observation period ( Assuming = 0.1) and margin() is 0, the maximum transmit power that the terminal can instantaneously use can be calculated as 33 dB according to the above mathematical formula 1. According to the present disclosure, under such assumptions, the terminal can transmit a signal at a power 10 dB higher than the existing 23 dBm. As described above, when the terminal transmits a signal at a higher power, the communication quality in the cell boundary area can be significantly improved.

[0102] Hereinafter, a method for determining the upper and lower limits of the maximum transmission power according to one embodiment of the present disclosure will be described in detail.

[0103] FIG. 5 is a flowchart illustrating the operation of determining the upper and lower limits of the maximum transmission power according to one embodiment of the present disclosure.

[0104] All operation steps illustrated in FIG. 5 are not necessarily required to be performed in order, and some steps may be omitted or modified. Specifically, depending on a specific situation or implementation method, some of the steps illustrated in FIG. 5 may be omitted or replaced with other steps, and the order of the steps may be changed or processed in parallel. For example, if the terminal does not support the Low PAPR waveform technique, steps S502 through S505 may be omitted, and if the terminal supports the Low PAPR waveform technique, steps S506 through S512 may be omitted. Alternatively, pre-set in the terminal If there is no need to change, step S502 may be omitted. Each step of FIG. 5 will be described in detail below.

[0105] Referring to FIG. 5, in step S501, the terminal and / or base station can check whether a Low PAPR waveform technique (e.g., FDSS-SE) is enabled for the terminal. If the Low PAPR waveform technique is enabled for the terminal, the terminal receives RRC signaling from the base station via It can be configured (step S502). If the terminal If it is already set, It can be reset to a value higher than the existing setting value. Alternatively, if the Low PAPR waveform technique is not enabled in the terminal, the terminal and / or base station can check whether PowerboostPi2BPSK is enabled and whether the uplink ratio according to the TDD setting information is 40% or less (step S506). PowerboostPi2BPSK may be an information element (IE) that allows the maximum output limit to be raised by 3dB.

[0106] In step S502, the terminal receives RRC signaling from the base station via After receiving the configuration, in step S503, the terminal and / or base station can check information regarding the uplink ratio from the TDD configuration information. For example, as can be seen in Table 2 below, the terminal and / or base station can check information indicating the symbol format from the TDD configuration and check the uplink ratio from the information indicating the symbol format. Meanwhile, the TDD configuration may be a semi-static TDD configuration transmitted and received between the terminal and the base station via RRC signaling or a dynamic TDD configuration transmitted and received between the terminal and the base station via DCI.

[0107]

[0108] In Table 2, the D symbol may represent a downlink symbol, the U symbol may represent an uplink symbol, and the F symbol may represent a flexible symbol.

[0109] According to a specific example of step S502, the terminal can check TDD configuration information from RRC signaling or DCI received from the base station. As described above, TDD configuration information can be received semi-statically through higher-layer signaling such as RRC signaling, or dynamically through DCI. In this example, it is assumed that the terminal receives an RRC message from the base station. The terminal can obtain symbol format information defining the TDD transmission pattern for a specific slot from the TDD configuration information within the RRC message (e.g., tdd-UL-DL-ConfigCommon). If the symbol format information obtained by the terminal indicates symbol format = 50, the terminal can check the symbol configuration by referring to a predefined slot format table (e.g., Table 2). By referring to Table 2, the terminal can confirm that the symbol configuration within the corresponding slot is configured as D, D, F, F, U, U, U, D, D, F, F, U, U, U. The terminal can calculate the ratio of resources allocated to the actual uplink by analyzing the symbol configuration as described above. According to one embodiment of the present disclosure, since the uplink ratio refers to the ratio of resources allocated to uplink signal transmission out of the total resources during the observation period, the terminal can determine the uplink ratio to be approximately 42.86% based on the fact that 6 out of 14 total symbols are for the uplink.

[0110] In step S504, the terminal and / or base station determines the Max. Tx. Power based on the uplink ratio identified in step S503. It can calculate. For example, the terminal and / or base station confirmed in step S503 By substituting the value into the aforementioned mathematical formula 1 It can produce.

[0111] In step S505, the terminal and / or base station is calculated in step S504 Based on and ...can be determined. As a specific example, the terminal and / or base station based on the following Equation 2 and can decide.

[0112]

[0113] In mathematical formula 2, is the maximum transmission power of the terminal, which may mean the maximum output power of the terminal configured for the carrier f of the serving cell c. and can mean the upper and lower limits of the maximum transmission power, respectively. This may refer to the maximum allowable transmission power that the base station sets to the terminal through RRC signaling. This may mean additional tolerance to allow temporary fluctuations in transmission power during transitional states, such as bandwidth changes. may mean the nominal maximum output power defined according to the power class of the terminal. and may refer to a power boosting value that allows the terminal to perform additional power amplification under specific conditions (e.g., Pi / 2-BPSK modulation at a high uplink duty cycle and / or a low duty cycle). Unlike as shown in Equation 2, and It can also be expressed as a single parameter (e.g., α). (maximum power reduction) may refer to the amount of transmission power reduction that a terminal applies to satisfy spectrum radiation requirements, such as the adjacent channel leakage ratio (ACLR), under specific modulation schemes (e.g., 16QAM, 64QAM) and resource allocation conditions. may mean an additional MPR value that the network directs for specific conditions. (Additional MPR) can refer to the additional power reduction required by a network to protect other wireless services in a specific frequency band. This may mean additional tolerances applied when continuous EN-DC or carrier aggregation (CA) is configured in the intra-band. may refer to a power reduction amount to control the effect on frequency reception while transmitting an SRS (sounding reference signal) signal from another cell. (Power Management MPR) may refer to the reduction amount for self-power management that a terminal applies to satisfy Specific Absorption Rate (SAR) regulations or to manage battery consumption.

[0114] Meanwhile, if the result of the judgment in step S506 is that PowerboostPi2BPSK is activated and the uplink ratio according to the TDD configuration information is 40% or less, the terminal and / or base station may perform a procedure to boost power based on a predefined fixed value. Specifically, in step S507, the terminal and / or base station, the power boosting to be applied in the step to be described later To secure an upper limit so as not to be clipped by, the maximum allowable transmission power value can be increased by a predetermined value (e.g., 3dB). In step S508, the terminal and / or base station or can be set to the above-mentioned predetermined value. When the above-mentioned predetermined value is 3dB, referring to the example in Equation 2, is -3dB, or can be set to 3dB. In step S509, the terminal and / or base station is determined according to steps S507 and S508 and power boosting parameters ( or Based on ) and You can determine the value. and The value can be determined based on the above mathematical formula 2.

[0115] Conversely, if, as a result of the judgment in step S506, PowerboostPi2BPSK does not satisfy the condition that the uplink ratio according to the activation condition and / or TDD configuration information is 40% or less, the terminal and / or base station may not perform the power boosting procedure. Specifically, in step S510, the terminal and / or base station, the maximum allowable transmit power value is It can be set to a state where it is not increased. In step S511, the terminal and / or base station, or can be set to 0. In step S512, the terminal and / or base station is determined according to steps S510 and S511 and power boosting parameters ( or Based on ) and You can determine the value. and The value can be determined based on the above mathematical formula 2.

[0116] Hereinafter, specific examples of operations for determining maximum transmission power by a terminal or base station according to one embodiment of the present disclosure will be described in detail.

[0117] FIG. 6a is a flowchart illustrating an example of an operation for determining maximum transmission power according to one embodiment of the present disclosure.

[0118] Referring to FIG. 6a, in step S601a, the base station (601) provides information regarding the uplink ratio of the terminal (602) (e.g., ...can be verified. Information regarding the uplink ratio may be the ratio of uplink time resources within a specific observation period to be set for the terminal (602) through TDD configuration information. For example, the base station (601) can verify symbol format information defining the TDD transmission pattern for a specific slot from the TDD configuration information (e.g., tdd-UL-DL-ConfigCommon) to be set for the terminal (602). If the symbol format information to be set for the terminal (602) indicates symbol format = 50, the base station (601) can verify the symbol configuration by referring to a predefined slot format table (e.g., Table 2). By referring to Table 2, the base station (601) can verify that the symbol configuration within the corresponding slot is configured as D, D, F, F, U, U, U, D, D, F, F, U, U, U. The base station (601) can calculate the ratio of resources allocated to the actual uplink by analyzing the symbol configuration as described above. According to one embodiment of the present disclosure, the uplink ratio refers to the ratio of resources allocated to uplink signal transmission out of the total resources during the observation period, so the base station (601) can determine the uplink ratio to be approximately 42.86% based on the fact that 6 out of 14 total symbols are for uplink.

[0119] In step S602a, the base station (601) based on information regarding the uplink ratio of the terminal (602) identified according to step S601a and It can determine. For example, the base station (601) can determine based on information regarding the uplink rate of the terminal (602). Calculate and the calculated Based on and You can determine the value. is calculated based on the aforementioned mathematical formula 1, and and The value can be determined based on the mathematical formula 2 described above.

[0120] In step S603a, the base station (601) is determined according to step S602a as a terminal (602). and The value can be indicated (or transmitted) via RRC signaling. For example, the base station (601) can indicate (or transmit) the value determined according to step S602a to the terminal (602) through information elements within the RRC message (e.g., the P_CMAX_H_Mod field and P_CMAX_L_Mod field within Phy-ParametersCommon). and You can specify the value.

[0121] In step S604a, the terminal (602) receives (or obtains) from the base station (601) and Maximum transmission power based on value ( ) can be determined. Afterwards, the terminal (602) can transmit a signal with the determined maximum transmission power as the upper limit.

[0122] FIG. 6b is a flowchart illustrating another example of an operation for determining maximum transmission power according to one embodiment of the present disclosure.

[0123] Referring to FIG. 6b, in step S601b, the base station (601) provides information regarding the uplink rate of the terminal (602) (e.g., ...can be verified. Information regarding the uplink ratio may be the ratio of uplink time resources within a specific observation period to be set for the terminal (602) through TDD configuration information. For example, the base station (601) can verify symbol format information defining the TDD transmission pattern for a specific slot from the TDD configuration information (e.g., tdd-UL-DL-ConfigCommon) to be set for the terminal (602). If the symbol format information to be set for the terminal (602) indicates symbol format = 50, the base station (601) can verify the symbol configuration by referring to a predefined slot format table (e.g., Table 2). By referring to Table 2, the base station (601) can verify that the symbol configuration within the corresponding slot is configured as D, D, F, F, U, U, U, D, D, F, F, U, U, U. The base station (601) can calculate the ratio of resources allocated to the actual uplink by analyzing the symbol configuration as described above. According to one embodiment of the present disclosure, the uplink ratio refers to the ratio of resources allocated to uplink signal transmission out of the total resources during the observation period, so the base station (601) can determine the uplink ratio to be approximately 42.86% based on the fact that 6 out of 14 total symbols are for uplink.

[0124] In step S602b, the base station (601) may determine a maximum output limit control parameter based on information regarding the uplink ratio of the terminal (602) identified according to step S601b. For example, the base station (601) may determine a maximum output limit control parameter based on information regarding the uplink ratio of the terminal (602). Calculate and the calculated Based on It can calculate (or determine). is calculated based on the aforementioned mathematical formula 1, and It can be determined based on the mathematical formula 2 described above.

[0125] In step S603b, the base station (601) is determined according to step S602b to be a terminal (602). It can be indicated (or transmitted) via RRC signaling. For example, the base station (601) can indicate (or transmit) to the terminal (602) the information element within the RRC message (e.g., the P_Delta_PowerClass_Mod field within Phy-ParametersCommon) determined according to step S602b. Can instruct.

[0126] In step S604b, the terminal (602) receives (or obtains) from the base station (601) Based on and Determine the value, and the determined and Maximum transmission power based on value ( ) can be determined. Afterwards, the terminal (602) can transmit a signal with the determined maximum transmission power as the upper limit.

[0127] FIG. 6c is a flowchart illustrating another example of an operation for determining maximum transmission power according to one embodiment of the present disclosure.

[0128] Referring to FIG. 6c, in step S601c, the base station (601) provides information regarding the uplink ratio of the terminal (602) (e.g., ...can be verified. Information regarding the uplink ratio may be the ratio of uplink time resources within a specific observation period to be set for the terminal (602) through TDD configuration information. For example, the base station (601) can verify symbol format information defining the TDD transmission pattern for a specific slot from the TDD configuration information (e.g., tdd-UL-DL-ConfigCommon) to be set for the terminal (602). If the symbol format information to be set for the terminal (602) indicates symbol format = 50, the base station (601) can verify the symbol configuration by referring to a predefined slot format table (e.g., Table 2). By referring to Table 2, the base station (601) can verify that the symbol configuration within the corresponding slot is configured as D, D, F, F, U, U, U, D, D, F, F, U, U, U. The base station (601) can calculate the ratio of resources allocated to the actual uplink by analyzing the symbol configuration as described above. According to one embodiment of the present disclosure, the uplink ratio refers to the ratio of resources allocated to uplink signal transmission out of the total resources during the observation period, so the base station (601) can determine the uplink ratio to be approximately 42.86% based on the fact that 6 out of 14 total symbols are for uplink.

[0129] In step S602c, the base station (601) may determine a maximum output limit control parameter based on information regarding the uplink ratio of the terminal (602) identified according to step S601c. For example, the base station (601) may determine a maximum output limit control parameter based on information regarding the uplink ratio of the terminal (602). Calculate and the calculated Based on It can calculate (or determine). is calculated based on the aforementioned mathematical formula 1, and It can be determined based on the mathematical formula 2 described above.

[0130] In step S603c, the base station (601) is determined according to step S602c as a terminal (602). It can be indicated (or transmitted) via RRC signaling. For example, the base station (601) can indicate (or transmit) to the terminal (602) according to step S602c through an information element within the RRC message (e.g., the P_Delta_PowerBoost_Mod field within Phy-ParametersCommon). Can instruct.

[0131] In step S604c, the terminal (602) receives (or obtains) from the base station (601) Based on and Determine the value, and the determined and Maximum transmission power based on value ( ) can be determined. Afterwards, the terminal (602) can transmit a signal with the determined maximum transmission power as the upper limit.

[0132] FIG. 7 is a flowchart illustrating another example of an operation for determining maximum transmission power according to one embodiment of the present disclosure.

[0133] Referring to FIG. 7, in step S701, the base station (701) can transmit mapping information between parameter values ​​for adjusting each of a plurality of uplink ratio intervals and the maximum output limit according to the power class of the terminal (702) through RRC signaling to the terminal (702). The mapping information can be configured, for example, as shown in Table 3 below.

[0134]

[0135] Referring to Table 3, it can be seen that the maximum output limit control parameter values ​​are mapped to each section divided into 10% increments of the uplink ratio. Alternatively, as shown in Table 4 below, the mapping information may be provided as information in which the maximum output limit control parameter values ​​are mapped to each section divided into 5% increments of the uplink ratio.

[0136]

[0137]

[0138] Meanwhile, the parameters in Tables 3 and 4 are of Equation 2. It starts with a negative value assuming that, , α, or When expressed in terms of other parameters, such as, they may be expressed as different values. For example, if the parameter is of Equation 2 And, if the UL Ratio is determined (or confirmed) to be 76, the parameter value corresponding to the UL Ratio of 76 in the examples of Tables 3 and 4 can be determined to be 0.9dB.

[0139] After the base station (701) transmits mapping information such as the example in Table 3 or Table 4 to the terminal (702), in step S702, the base station (701) may transmit an RRC message containing TDD configuration information to the terminal (702). The TDD configuration information may include information indicating the symbol format of the above-described step S502.

[0140] In step S703, the terminal (702) based on the TDD configuration information included in the received RRC message and A value can be determined. For example, the terminal (702) can determine the uplink rate from information indicating the symbol format included in the TDD setting information. The terminal (702) can determine a maximum output limit control parameter value corresponding to the symbol rate confirmed from the mapping information of step S701. By substituting the determined maximum output limit control parameter value into the above Equation 2, the terminal (702) and A value can be determined. For example, if the terminal (702) confirms that the symbol format is 50 from the TDD configuration information as shown in Table 2 above, the terminal (702) can determine the UL ratio to be 42.86% because 6 out of 14 symbols are uplink symbols. If, in step S701, the terminal (702) receives mapping information configured as shown in Table 3 from the base station, the terminal (702) can determine a parameter value corresponding to the UL ratio of 42.86% based on the mapping information configured as shown in Table 3. Specifically, the terminal (702) can determine the parameter value for adjusting the maximum output limit according to the power class to be -3dB. As another example, if the terminal (702) confirms that the symbol format is 50 from the TDD configuration information as shown in Table 2 above, the terminal (702) can determine the UL ratio to be 42.86% because 6 out of 14 symbols are uplink symbols. If, in step S701, the terminal (702) receives mapping information configured as shown in Table 4 from the base station, the terminal (702) can determine a parameter value corresponding to a UL ratio of 42.86% based on the mapping information configured as shown in Table 4. Specifically, the terminal (702) can determine a parameter value of -3.4dB to adjust the maximum output limit according to the power class.

[0141] FIG. 8 is a flowchart illustrating another example of an operation for determining maximum transmission power according to one embodiment of the present disclosure.

[0142] Referring to FIG. 8, in step S801, the base station (801) can determine the uplink rate of the terminal (802) during a specific observation period. The specific observation period may be a specific observation period in the immediate past or a specific observation period in the immediate future. The uplink rate of the terminal (802) during the specific observation period in the immediate past may be determined based on the uplink signals received by the base station (801) from the terminal (802). For example, the base station (801) may determine the number of uplink symbols received from the terminal (802) among the most recent 14 symbols. If the base station (801) receives uplinks from the terminal (802) in 6 of the most recent 14 symbols, the base station (801) may determine the uplink rate to be approximately 42.86%. Alternatively, the uplink rate of the terminal (802) during the specific observation period in the immediate future may be determined based on the Dynamic TDD configuration that the base station (801) sets for the terminal (802). For example, the base station (801) can identify symbol format information that defines the TDD transmission pattern for a specific slot from the TDD configuration information to be set for the terminal (802) (e.g., SlotFormatCombination within DCI Format 2_0). If the symbol format information to be set for the terminal (802) indicates symbol format = 50, the base station (801) can identify the symbol configuration by referring to a predefined slot format table (e.g., Table 2). By referring to Table 2, the base station (801) can identify that the symbol configuration within the corresponding slot is configured as D, D, F, F, U, U, U, D, D, F, F, U, U, U. The base station (801) can calculate the ratio of resources allocated to the actual uplink by analyzing the symbol configuration as described above.According to one embodiment of the present disclosure, the uplink ratio refers to the ratio of resources allocated to uplink signal transmission out of the total resources during the observation period, so the base station (801) can determine the uplink ratio to be approximately 42.86% based on the fact that 6 out of 14 total symbols are for uplink.

[0143] In step S802, the base station (801) may determine a maximum output limit control parameter based on the uplink ratio of the terminal (802) identified according to step S801. For example, the base station (801) may determine based on the uplink ratio of the terminal (802). It can calculate (or determine). The base station (801) calculates the Based on or can decide.

[0144] In step S803, the base station (801) provides the terminal (802) with a maximum output limit control parameter (e.g., or An indicator (e.g., PowerBoostInd) to indicate the value can be transmitted via DCI. For example, PowerBoostInd within DCI and or The mapping relationship between values ​​can be configured as shown in Table 5 below.

[0145]

[0146] Meanwhile, the parameters in Table 5 are of Equation 2. It starts with a positive value assuming that, , α, or When expressed in terms of other parameters, such as, they may be expressed as different values. For example, if the parameter is of Equation 2 And, if the indicated PowerBoostInd is 01, the parameter value indicated in the example of Table 5 may be -8dB.

[0147] When the terminal (802) receives the indicator, it has an uplink transmission scheduled by the DCI based on parameters indicated according to the indicator. and Determine, and the determined and for uplink transmissions scheduled by the above DCI within It can determine. The terminal (802) is determined Uplink transmissions scheduled by the above DCI can be performed with the upper limit.

[0148] Meanwhile, as described above, and The value It may be limited by. Therefore, in order for the terminal to boost the actual output power using a power boosting value determined according to the uplink ratio, It is necessary to update it. In the following, a terminal according to one embodiment of the present disclosure Explain the process of determining.

[0149] FIG. 9 is a flowchart illustrating the process of a terminal determining the maximum allowable transmission power according to one embodiment of the present disclosure.

[0150] Referring to FIG. 9, in step S901, the terminal is currently set for the terminal It can determine (or verify, decide) whether it is small enough to perform the power boosting described above. For example, determined according to the uplink ratio of the terminal go If it is 5dB greater than, the terminal may perform power boosting by 5dB based on the operations described above. In order for the terminal to perform power boosting by 5dB, the terminal must use the currently set for the terminal go It can determine if it is set to a value of +5 or higher.

[0151] Currently set on the terminal If it is determined that the power boosting described above is too small to perform, in step S902, the terminal goes to the base station You can send an upward request. Upward requests can be transmitted via RRC signaling or UCI.

[0152] In step S903, the terminal is uplinked from the base station in accordance with the uplink request. Can receive. Upward It can be received via RRC signaling or DCI.

[0153] In step S904, the terminal is updated Based on and The value can be determined. If the value is currently set for the terminal in step S901 If it is determined that is too small to perform the power boosting described above, the updated is raised according to Step S902 and Step S903 It may be. Or, if the current terminal is set in step S901 If it is determined that is not small enough to perform the power boosting described above, the updated is the previously set It could be.

[0154] Meanwhile, in order to perform a power boosting operation according to one embodiment of the present disclosure, a standard defining the operation of a terminal and / or base station may be required. The definition of the power boosting operation according to one embodiment of the present disclosure may be configured, for example, as shown in Table 6 below.

[0155]

[0156]

[0157] Referring to Table 6, Notes 6 through 9 at the bottom of Table 6 define specific conditions for applying dynamic power boosting according to an embodiment of the present disclosure to the 3GPP standard MPR (maximum power reduction) table. Notes 6 and 7 describe general boosting conditions for terminals using Pi / 2 BPSK or QPSK modulation schemes, respectively. In other words, Notes 6 and 7 define basic dynamic power boosting conditions to improve uplink coverage for terminals in poor communication environments, such as cell edges, by utilizing the characteristics of the TDD system. Specifically, referring to Notes 6 and 7, when a terminal operating in TDD mode transmits a signal below a specific uplink rate, the reference power serving as the standard for 0dB MPR is It discloses that it can be increased by that amount. Here represents a parameter value for adjusting the maximum output limit. In other words, referring to NOTE 6 and NOTE 7, the terminal and / or base station, based on the identified uplink ratio through the methods described above, Determines, and the terminal and / or base station is determined Based on this, the upper and lower limits of the maximum output power can be determined. NOTE 8 and NOTE 9 describe Low PAPR waveform-linked boosting according to one embodiment of the present disclosure. Low PAPR waveform-linked boosting according to one embodiment of the present disclosure may be an advanced method for overcoming technical limitations that may occur when increasing transmission power. Specifically, if transmission power is increased above a reference value, signal distortion occurs in the non-linear region of the power amplifier, which may result in failure to satisfy wireless standards such as ACLR (adjacent channel leakage ratio). Low PAPR waveforms have characteristics that are robust against such non-linear distortion, enabling stable communication while maintaining signal quality even at high power. Referring to NOTE 8 and NOTE 9, the following additional conditions may be required for the Low PAPR waveform-linked boosting operation according to one embodiment of the present disclosure:

[0158] - Capability Reporting: A condition in which the terminal must report to the base station that it supports specific capability information associated with the use of Low PAPR waveforms (e.g., powerBoosting-pi2BPSK-LowPAPR and / or powerBoosting-QPSK-LowPAPR).

[0159] - Function activation (IE setting): A condition in which the base station must instruct the terminal by setting an information element that instructs the use of a power boosting function according to one embodiment of the present disclosure to 1.

[0160] When all the conditions described above are satisfied, the reference power at 0dB MPR is It can be increased by that amount. In other words, if a low uplink rate, the terminal's capability report, and the base station's function activation are all satisfied, the terminal can maximize transmit power without degrading communication quality by increasing reference power while using a Low PAPR waveform.

[0161] Hereinafter, the operation of a terminal according to one embodiment of the present disclosure will be described.

[0162] FIG. 10 is a flowchart illustrating the operation of a terminal according to one embodiment of the present disclosure.

[0163] Referring to FIG. 10, in step S1001, the terminal may receive an RRC message from a base station. The RRC message may include various configuration information for the power control operation of the terminal, which will be described below. In step S1002, the terminal may determine an upper and lower limit of the maximum output power for the uplink transmission of the terminal based on the RRC message. The upper and lower limit of the maximum output power may be determined to have a negative correlation with the uplink ratio according to the TDD configuration information. The specific process for determining the upper and lower limit of the maximum output power will be described below with reference to FIG. 11 to 13. In step S1003, the terminal may determine the maximum transmission power for the uplink transmission of the terminal within the range of the determined upper and lower limits of the maximum output power. In step S1004, the terminal may transmit a signal to the base station based on the maximum transmission power.

[0164] FIG. 11 is a flowchart specifically illustrating one example of step S1002 of FIG. 10.

[0165] Referring to FIG. 11, in step S1101, the terminal can check TDD configuration information included in the RRC message. For example, the terminal can check symbol format information defining a TDD transmission pattern for a specific slot from tdd-UL-DL-ConfigCommon included in the RRC message. In step S1102, the terminal can check a first value for the uplink ratio based on the confirmed TDD configuration information. The first value is information regarding the uplink ratio and may be at least one of information indicating the uplink ratio within a specific interval according to the TDD configuration information or uplink scheduling information within the specific interval. For example, if the symbol format information obtained (or confirmed) by the terminal in step S1101 indicates symbol format = 50, the terminal can check the symbol configuration by referring to a predefined slot format table (e.g., Table 2). Referring to Table 2, the terminal can confirm that the symbol configuration within the corresponding slot is configured as D, D, F, F, U, U, U, D, D, F, F, U, U, U. The terminal can calculate the ratio of resources allocated to the actual uplink by analyzing the symbol configuration as described above. According to one embodiment of the present disclosure, since the uplink ratio refers to the ratio of resources allocated to uplink signal transmission out of the total resources during the observation period, the terminal can determine the uplink ratio to be approximately 42.86% based on the fact that 6 out of the 14 total symbols are for the uplink. In other words, the terminal can determine the uplink ratio determined through the method described above as the first value. In step S1103, the terminal can calculate a second value determined to have a negative correlation with the uplink ratio based on the first value. The second value may be a parameter value for adjusting the maximum output limit according to the power class of the terminal. The second value may be determined based on the mathematical formulas described above. For example, the above second value is of mathematical formula 1. , of mathematical formula 2 , or It can be determined as. In step S1104, the terminal can determine the upper and lower limits of the maximum output power based on the second value. For example, the terminal can determine the upper and lower limits of the maximum output power by substituting the second value into the above-described mathematical formula 1 and / or mathematical formula 2.

[0166] FIG. 12 is a flowchart specifically illustrating one example of step S1002 of FIG. 10.

[0167] Referring to FIG. 12, in step S1201, the terminal may determine at least one of information indicating the upper and lower limits of the maximum output power or information indicating a second value based on the RRC message. The second value may be a parameter value for adjusting the maximum output limit according to the power class of the terminal. The second value may be determined based on the mathematical formulas described above. For example, the base station may determine the uplink ratio based on symbol format information defining the TDD transmission pattern for a specific slot included in the TDD configuration information (e.g., tdd-UL-DL-ConfigCommon) to be set for the terminal, and determine the information indicating the upper and lower limits of the maximum output power or the information indicating the second value based on the determined uplink ratio. The base station may transmit the determined information indicating the upper and lower limits of the maximum output power or the second value to the terminal. In step S1202, the terminal may determine the upper and lower limits of the maximum output power based on at least one of information indicating the upper and lower limits of the maximum output power or information indicating the second value. For example, if the terminal receives information indicating the upper and lower limits of the maximum output power, the terminal may determine the received information indicating the upper and lower limits of the maximum output power as the upper and lower limits of the maximum output power. Alternatively, if the terminal receives information indicating the second value, the terminal may determine the upper and lower limits of the maximum output power by substituting the second value into the above-described Equation 1 and / or Equation 2.

[0168] FIG. 13 is a flowchart specifically illustrating an example of step S1002 of FIG. 10.

[0169] Referring to FIG. 13, in step S1301, the terminal may receive mapping information from the base station between parameter values ​​for controlling each of the multiple segments of the uplink ratio and the maximum output limit according to the power class of the terminal. For example, the terminal may receive mapping information configured as shown in Table 3 or Table 4 from the base station. In step S1302, the terminal may verify a first value for the uplink ratio based on TDD configuration information included in the RRC message. For example, the terminal may verify symbol format information defining a TDD transmission pattern for a specific slot from tdd-UL-DL-ConfigCommon included in the RRC message. If the symbol format information obtained (or verified) by the terminal indicates symbol format = 50, the terminal may verify the symbol configuration by referring to a predefined slot format table (e.g., Table 2). Referring to Table 2, the terminal can confirm that the symbol configuration within the corresponding slot is configured as D, D, F, F, U, U, U, D, D, F, F, U, U, U. The terminal can calculate the ratio of resources allocated to the actual uplink by analyzing the symbol configuration as described above. According to one embodiment of the present disclosure, since the uplink ratio refers to the ratio of resources allocated to uplink signal transmission out of the total resources during the observation period, the terminal can determine the uplink ratio to be approximately 42.86% based on the fact that 6 out of the 14 total symbols are for the uplink. In other words, the terminal can determine the uplink ratio determined through the method described above as the first value. In step S1303, the terminal can determine a second value corresponding to the first value among the parameter values ​​based on the mapping information. For example, if the terminal receives mapping information configured as shown in Table 3 in step S1301, and the terminal determines the uplink ratio to be approximately 42.86% as described above, the terminal sets the second value to UL ratio 42 within Table 3.It can be determined as a parameter value corresponding to 86%. Specifically, the terminal can determine a parameter value of -3dB to adjust the maximum output limit according to the power class. As another example, if the terminal receives mapping information configured as shown in Table 4 in step S1301 and the terminal determines the uplink ratio to approximately 42.86% as described above, the terminal can determine a second value as a parameter value corresponding to the UL ratio of 42.86% within Table 4. Specifically, the terminal can determine a parameter value of -3.4dB to adjust the maximum output limit according to the power class. In step S1304, the terminal can determine the upper and lower limits of the maximum output power based on the second value. For example, the terminal can determine the upper and lower limits of the maximum output power by substituting the second value into the above-described Equation 1 and / or Equation 2.

[0170] FIG. 14 is a flowchart illustrating the operation of a terminal according to one embodiment of the present disclosure.

[0171] Referring to FIG. 14, in step S1401, the terminal may receive a DCI from a base station containing information indicating a second value. The second value may be a parameter value for adjusting the maximum output limit according to the power class of the terminal. For example, the terminal may receive a DCI from a base station indicating a parameter value indicated according to mapping information such as Table 5 above. In step S1402, the terminal may determine an upper and lower limit of the maximum output power for an uplink transmission scheduled by the DCI based on the second value. In step S1403, the terminal may determine the maximum transmit power for an uplink transmission scheduled by the DCI within the upper and lower limit range of the maximum output power for an uplink transmission scheduled by the DCI. In step S1404, the terminal may transmit a signal to the base station with the maximum transmit power for an uplink transmission scheduled by the DCI as the upper limit.

[0172] Meanwhile, according to one embodiment of the present disclosure, the terminal can transmit capability information indicating that it supports the uplink transmission power control method to the base station.

[0173] FIG. 15 is a flowchart illustrating the operation of a base station according to one embodiment of the present disclosure.

[0174] Referring to FIG. 15, in step S1501, the base station may transmit an RRC message to the terminal. The RRC message may include at least one of information indicating the upper and lower limits of the maximum output power, information indicating a second value, or TDD setting information. The second value may be a parameter value for adjusting the maximum output limit according to the power class of the terminal. The upper and lower limits of the maximum output power may be determined based on the second value. If the RRC message includes information indicating the upper and lower limits of the maximum output power or information indicating the second value, the base station may check the uplink ratio and determine the information indicating the upper and lower limits of the maximum output power or the information indicating the second value from the checked uplink ratio. For example, the base station may check symbol format information defining the TDD transmission pattern for a specific slot from the TDD setting information to be set for the terminal (e.g., tdd-UL-DL-ConfigCommon). When the symbol format information to be set in the terminal indicates symbol format = 50, the base station can check the symbol configuration by referring to a predefined slot format table (e.g., Table 2). By referring to Table 2, the base station can confirm that the symbol configuration within the corresponding slot is configured as D, D, F, F, U, U, U, D, D, F, F, U, U, U. The base station can calculate the ratio of resources allocated to the actual uplink by analyzing the symbol configuration as described above. According to one embodiment of the present disclosure, since the uplink ratio refers to the ratio of resources allocated to uplink signal transmission out of the total resources during the observation period, the base station can determine the uplink ratio to be approximately 42.86% based on the fact that 6 out of the total 14 symbols are for the uplink.Based on the determined uplink ratio, the base station may determine information indicating the upper and lower limits of the maximum output power or information indicating a second value, and transmit this to the terminal. In step S1502, the base station may receive a signal from the terminal that transmits the maximum transmission power as an upper limit, determined within the range of the upper and lower limits of the maximum output power for the terminal's uplink transmission. The upper and lower limits of the maximum output power may be determined to have a negative correlation with the uplink ratio according to the TDD setting information.

[0175] Meanwhile, according to one embodiment of the present disclosure, a base station may transmit mapping information between parameter values ​​for controlling a maximum output limit according to the power class of the terminal and each of a plurality of intervals of an uplink ratio to the terminal. The upper and lower limits of the maximum output power may be determined based on a second value corresponding to a first value for the uplink ratio among the parameter values.

[0176] FIG. 16 is a flowchart illustrating the operation of a base station according to one embodiment of the present disclosure.

[0177] Referring to FIG. 16, in step S1601, the base station may transmit a DCI containing information indicating a second value to the terminal. The second value may be a parameter value for adjusting the maximum output limit according to the power class of the terminal. For example, the base station may check the uplink rate of the terminal during a specific observation period, determine the second value based on the checked uplink rate, and then transmit a DCI to the terminal to indicate the second value. The second value may be indicated based on mapping information such as Table 5. Specifically, if the base station determines the second value to be 8dB, the base station may transmit to the terminal a PowerBoostInd consisting of 01 within the DCI according to the mapping relationship of Table 5. In step S1602, the base station may receive an uplink transmission scheduled by the DCI from the terminal. The uplink transmission scheduled by the above DCI can be transmitted at a maximum transmission power within the upper and lower limits of the maximum output power determined based on the second value.

[0178] Hereinafter, the configuration of a terminal, a base station, and a network entity according to one embodiment of the present disclosure will be described.

[0179] FIG. 17 is a block diagram of a terminal or user equipment according to one embodiment of the present disclosure.

[0180] The terminal (1700) is an electronic device capable of wireless communication and may include user equipment (UE), mobile phones, smartphones, tablets, Internet of Things (IoT) devices having various form factors, and can perform wireless communication with a base station through a wireless channel.

[0181] Referring to FIG. 17, the terminal (1700) may include at least one transceiver (1701) (hereinafter, transceiver), at least one processor (1702) (hereinafter, processor), and at least one memory (1703) (hereinafter, memory). According to at least one or a combination thereof of methods corresponding to embodiments of the present disclosure, the transceiver (1701), processor (1702), and memory (1703) of the terminal (1700) may be operated. However, the components of the terminal (1700) are not limited to the examples of components shown in FIG. 17. In other embodiments, the terminal (1700) may include additional components in addition to the aforementioned components, or some components may be omitted. Also, in some embodiments, any combination of the transceiver (1701), processor (1702), or memory (1703) may be integrated into a single component.

[0182] The transceiver (1701) may be a basic communication circuit or communication circuitry that enables the terminal (1700) to perform wireless communication with a node or entity of a network. For example, the transceiver (1701) may enable the terminal (1700) to transmit and receive signals via cellular wireless communication with a base station or to transmit and receive signals via cellular wireless communication with another terminal. For example, the transceiver (1701) may support at least one of various cellular wireless communication technologies including 3G (3rd generation), 4G (4th generation) LTE (long-term evolution), 5G (5th generation) NR (new radio), 6G (6th generation), etc., and the various cellular wireless communication technologies supported by the transceiver (1701) may include all subsequent generations of wireless communication.

[0183] According to one embodiment, the terminal (1700) may include a plurality of transceivers, and for example, when supporting EN-DC (E-UTRA (evolved-universal terrestrial radio access) - NR dual connectivity), it may include a first transceiver supporting 4G LTE wireless communication and a second transceiver supporting 5G NR wireless communication. According to another embodiment, when the terminal (1700) supports NR-DC (NR Dual Connectivity), the terminal (1700) may include a plurality of transceivers supporting 5G NR wireless communication. According to another embodiment, if the terminal (1700) supports short-range wireless communication, the terminal (1700) may separately include a transceiver that supports at least one of a group of wireless communication protocol standards such as those defined by Bluetooth®, wireless LAN or WLAN (wireless local area network) network (including, but not limited to, IEEE (institute of electrical and electronics engineer) 802.11-2016 standard or modifications thereof such as 802.11ah, 802.11ad, 802.11ay, 802.11ax, 802.11az, 802.11ba and 802.11be).

[0184] According to one embodiment, the transceiver (1701) may include various circuit structures used to transmit and receive signals to and from a base station via a wireless channel. The signals may include control information and data. For example, the transceiver (1701) may be configured to include a radio frequency (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. The transceiver (1701) may output the signal received via the wireless channel to a processor (1702) and transmit the signal output from the processor (1702) via the wireless channel.

[0185] A processor (1702) may control the overall operation of a terminal (1700) according to an embodiment of the present disclosure. The processor (1702) may be implemented as one or more IC (integrated circuit (or circuitry)) chips and may perform various data processing operations. The processor (1702) may include at least one electrical circuit and may execute instructions (or programs, code, data, etc.) stored in memory (1703) individually, collectively, or in any combination. Additionally, the processor (1702) may include a single-core processor or a multi-core processor, and in a specific implementation, may be composed of a processor assembly including a plurality of processing circuits.

[0186] The processor (1702) is electrically, operatively, or communicatively coupled to the transceiver (1701) so as to control the transceiver (1701).

[0187] The processor (1702) may include at least one processor (or, processing circuitry), and at least one processor may perform the following operations individually, collectively, or in any combination. For example, the processor (1702) may include a communication processor (CP) that controls communication operations and an application processor (AP) that controls the execution of an upper layer (e.g., an application layer). In a specific embodiment, at least one part of the processor (1702) may be included in one chip, and another part of the processor (1702) may be included in a separate chip. Alternatively, at least one processor may be included in other components, e.g., a transceiver (1701) or a memory (1703).

[0188] The processor (1702) may perform, cause, or control the operation of a terminal to perform at least one or a combination of the methods according to the embodiments of the present disclosure. For example, the processor (1702) may control the operation of a terminal to process a downlink signal received from a base station or to generate an uplink signal and transmit it to a base station. To this end, the processor (1702) may control other components of the terminal (1700) to perform various operations by executing computer programs, code, or instructions stored in memory (1703).

[0189] Memory (1703) is a hardware storage device capable of storing information temporarily or permanently and may include one or more storage media. For example, memory (1703) may include a memory assembly comprising one or more storage media. For example, the one or more storage media may include a hard drive, flash memory, permanent memory such as ROM (read-only memory), semipermanent memory such as RAM (random access memory), cache memory, or any combination thereof.

[0190] The memory (1703) can be electrically, operatively, or communically coupled with the processor (1702) and can be accessed by the processor (1702).

[0191] A computer program, code, or instruction that can be executed by a processor (1702) may be stored in the memory (1703). According to one embodiment, the computer program, code, or instruction that can be executed by the processor (1702) may be stored in a single memory device or may be separated and distributed across two or more memory devices. The processor (1702) may perform various functions according to the embodiments of the present disclosure by executing the instruction stored in the memory (1703).

[0192] According to one embodiment of the present disclosure, the operation of the terminal (1700) may be caused to be performed based on at least one processor (or processing circuit) configured to perform the features of the present disclosure individually, collectively, or in any combination based on the execution of instructions (or computer program or code) stored in memory (1703), based on processing circuitry not configured to execute instructions, and / or based on components of a processing circuitry not configured to execute instructions.

[0193] FIG. 18 is a block diagram of a base station according to one embodiment of the present disclosure.

[0194] The base station (1800) can perform wireless communication with at least one terminal within the area of ​​the base station (1800) through a wireless channel.

[0195] Referring to FIG. 18, a base station (1800) may include at least one transceiver (1801) (hereinafter, transceiver), at least one processor (1802) (hereinafter, processor), and at least one memory (1803) (hereinafter, memory). According to at least one or a combination thereof of methods corresponding to embodiments of the present disclosure, the transceiver (1801), processor (1802), and memory (1803) of the base station (1800) may be operated. However, the components of the base station (1800) are not limited to the examples of components shown in FIG. 18. In other embodiments, the base station (1800) may include additional components in addition to the aforementioned components, or some components may be omitted. Also, in some embodiments, any combination of the transceiver (1801), processor (1802), or memory (1803) may be integrated into a single component.

[0196] The transceiver (1801) may be a communication circuit or communication circuitry that enables the base station (1800) to perform wireless communication with a node or entity of the network. For example, the transceiver (1801) may enable the base station (1800) to transmit and receive signals to and from a terminal (1700) via cellular wireless communication or to transmit and receive signals to and from another network entity via wireless communication. For example, the transceiver (1801) may support various cellular wireless communication technologies including 3G (3rd generation), 4G (4th generation) LTE (long-term evolution), 5G (5th generation) NR (new radio), 6G (6th generation), etc., and the various cellular wireless communication technologies supported by the transceiver (1801) may include all subsequent generations of wireless communication. According to one embodiment, the transceiver (1801) may include various circuit structures used to transmit and receive signals to and from a terminal via a wireless channel. The signals may include control information and data. For example, the transceiver (1801) may be configured to include a radio frequency (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. The transceiver (1801) may output the signal received via the wireless channel to a processor (1802) and transmit the signal output from the processor (1802) via the wireless channel.

[0197] Meanwhile, according to one embodiment of the present disclosure, a base station (1800) may communicate with an entity or node of a network via wired or wireless communication. For example, the base station (1800) may communicate via wired or wireless communication with an entity or node of an adjacent base station or core network via a backhaul network. Although not shown in the drawings, when the base station (1800) performs wired communication, the base station (1800) may include a separate network interface for wired communication in addition to the transceiver (1801). The network interface may be referred to as network interface circuitry, communication interface circuitry, etc.

[0198] A processor (1802) can control the overall operation of a base station (1800) according to an embodiment of the present disclosure. The processor (1802) may be implemented as one or more IC (integrated circuit or circuitry) chips and may perform various data processing operations. The processor (1802) may include at least one electrical circuit and may execute instructions (or programs, code, data, etc.) stored in memory (1803) individually, collectively, or in any combination. Additionally, the processor (1802) may include a single-core processor or a multi-core processor, and in a specific implementation, may be composed of a processor assembly including a plurality of processing circuits.

[0199] The processor (1802) is electrically, operatively, or communicatively coupled to the transceiver (1801) so as to control the transceiver (1801).

[0200] The processor (1802) may include at least one processor (or processor circuitry), and at least one processor may perform the following operations individually, collectively, or in any combination. In a particular embodiment, at least one part of the processor (1802) may be included in one chip, and another part of the processor (1802) may be included in a separate chip. Alternatively, at least one processor may be included in other components, such as a transceiver (1801) or memory (1803).

[0201] The processor (1802) may perform, cause, or control the operation of a base station to perform at least one or a combination of the methods according to the embodiments of the present disclosure. For example, the processor (1802) may control the operation of a base station to generate a downlink signal and transmit it to a terminal, or to process an uplink signal received from a terminal. Alternatively, the base station may transmit and receive signals with an adjacent base station, transmit a signal received from a terminal to an upper node of the network, or receive a signal from an upper node of the network and transmit it to a terminal. To this end, the processor (1802) may control other components of the base station (1800) to perform various operations by executing computer programs, codes, and instructions stored in memory (1803).

[0202] Memory (1803) is a hardware storage device capable of storing information temporarily or permanently and may include one or more storage media. For example, memory (1803) may include a memory assembly comprising one or more storage media. For example, the one or more storage media may include a hard drive, flash memory, permanent memory such as ROM (read-only memory), semi-permanent memory such as RAM (random access memory), cache memory, or any combination thereof.

[0203] The memory (1803) can be electrically, operatively, or communically coupled with the processor (1802) and can be accessed by the processor (1802).

[0204] A computer program, code, or instruction that can be executed by a processor (1802) may be stored in the memory (1803). According to one embodiment, the computer program, code, or instruction that can be executed by the processor (1802) may be stored in a single memory device or may be separated and distributed among two or more memory devices. The processor (1802) may perform various functions according to the embodiments of the present disclosure by executing the instruction stored in the memory (1803).

[0205] According to one embodiment of the present disclosure, the operation of a base station (1800) may be caused to be performed based on at least one processor (or processing circuitry) configured to perform the features of the present disclosure individually, collectively, or in any combination based on the execution of instructions (or computer programs or code) stored in memory (1803), based on processing circuitry not configured to execute instructions, and / or based on components of a processing circuitry not configured to execute instructions.

[0206] A terminal or a base station can perform various communication procedures related to the control plane or user plane by interacting with network entities based on communication through a wireless channel. For example, a terminal can communicate with network entities such as an access and mobility management function (AMF) or a session management function (SMF) through a base station. Alternatively, the base station can perform at least one communication procedure by directly transmitting and receiving signals or relaying them with network entities. The structure of the above-mentioned network entities will be explained in more detail through the drawings below.

[0207] FIG. 19 is a block diagram of a network entity performing a network function according to one embodiment of the present disclosure.

[0208] A network entity (1900) may include one or more network functions (NF) that constitute a core network (e.g., 5G (5th generation) core, 5GC) in a communication system, or entities (devices, devices, nodes, or servers, etc.) that perform part of a network function. In this case, multiple NFs may be implemented within a single network entity, or a single NF may be distributed and implemented across multiple network entities. Additionally, when an NF is implemented within a network entity, the NF may be implemented in the form of software, and in such cases, a program for running the NF may be loaded into the memory of the network entity (1900).

[0209] A single NF can be implemented as one or more instances and can operate by being distributed across the same network entity or multiple network entities. Here, the instance is a software unit that logically executes a specific network function and may be separate from physical hardware resources. Additionally, one or more NFs may be implemented as a single network slice to operate in order to satisfy the specifications required by a specific service.

[0210] The above NF may include any one of an access and mobility management function (AMF), a session management function (SMF), a local session management function (L-SMF), a user plane function (UPF), a local user plane function (L-UPF), a policy control function (PCF), unified data management (UDM), a unified data repository (UDR), a network exposure function (NEF), a network repository function (NRF), an application function (AF), a network slice selection function (NSSF), a network data analytics function (NWDAF), a network slice admission control function (NSACF), an authentication server function (AUSF), or a data network (DN).

[0211] Referring to FIG. 19, a network entity (1900) may include at least one network interface (1901), at least one processor (1902) (hereinafter, processor), and at least one memory (1903) (hereinafter, memory). As described above, the NF may be implemented in the form of a physical device such as the network entity (1900), or may be implemented and executed in the form of a virtualized instance. When the NF is implemented in the form of an instance, it may not necessarily include physical components as illustrated in FIG. 19. In such cases, the instance may be composed of one or more logical functional units and may be logically represented.

[0212] According to at least one or a combination thereof of the methods corresponding to the embodiments of the present disclosure, the network interface (1901), processor (1902), and memory (1903) of the network entity (1900) may be operated. However, the components of the network entity (1900) are not limited to the examples of components shown in FIG. 19. In other embodiments, the network entity (1900) may include additional components in addition to the aforementioned components, or some components may be omitted. Also, in one embodiment, the network interface (1901), processor (1902), or memory (1903) may be implemented as a single component.

[0213] The network interface (1901) is a collective term for the transmitting and receiving parts of a network entity and may be a communication circuit for transmitting and receiving signals with a terminal (user equipment, UE), a base station, or other network entities. In this case, the communication circuit may include both a communication circuit for wireless communication and a communication circuit for wired communication. For example, the network interface (1901) may include circuits, logic, hardware, etc. configured to exchange control plane messages or user plane messages with a terminal, a base station, or other core network entities via wireless or wired communication. The network interface (1901) may operate using various protocols (e.g., NAS (Non-Access Stratum) protocols). Depending on the convenience of description and technical implementation, the network interface (1901) may be referred to as a communication circuitry, a network interface circuitry, or a communication interface circuitry.

[0214] A processor (1902) may control the overall operation of a network entity (1900) according to an embodiment of the present disclosure. In one embodiment, the processor (1902) may be implemented as one or more IC (integrated circuit or circuitry) chips and may perform various data processing operations. The processor (1902) may include at least one electrical circuit and may execute instructions (or programs, code, data, etc.) stored in memory (1903) individually, collectively, or in any combination. Additionally, the processor (1902) may include a single-core processor or a multi-core processor, and in a specific implementation, may be composed of a processor assembly including a plurality of processing circuits. Additionally, it should be noted that the processor (1902) may not necessarily be composed of physical hardware when the network function (1900) is implemented in an instance form according to another embodiment.

[0215] According to one embodiment, the processor (1902) is electrically, operatively, or communicatively coupled to the network interface (1901) so as to control the network interface (1901).

[0216] The processor (1902) may include at least one processor (or processor circuitry), and at least one processor may perform the following operations individually, collectively, or in any combination. In a particular embodiment, at least one part of the processor (1902) may be included in one chip, and another part of the processor (1902) may be included in a separate chip. Alternatively, at least one processor may be included in other components, such as a network interface (1901) or memory (1903).

[0217] A processor (1902) may perform or control operations of a network entity (1900) to perform at least one or a combination thereof of methods according to embodiments of the present disclosure. For example, the processor (1902) may control operations of the network entity (1900) to exchange control plane messages or user plane messages with terminals, base stations, or other core network entities via wireless or wired communication using various protocols (e.g., NAS protocols). To this end, the processor (1902) may control other components of the network entity (1900) to perform various operations by executing computer programs, code, or instructions stored in memory (1903).

[0218] Memory (1903) is a hardware storage device capable of storing information temporarily or permanently and may include one or more storage media. For example, memory (1903) may include a memory assembly comprising one or more storage media. For example, the one or more storage media may include a hard drive, flash memory, permanent memory such as ROM (read-only memory), semipermanent memory such as RAM (random access memory), cache memory, or any combination thereof.

[0219] According to one embodiment, the memory (1903) may be electrically, operatively, or communically coupled with the processor (1902) and may be accessed by the processor (1902).

[0220] A computer program, code, or instruction that can be executed by a processor (1902) may be stored in the memory (1903). According to one embodiment, the computer program, code, or instruction that can be executed by the processor (1902) may be stored in a single memory or may be separated and distributed across two or more memories. The processor (1902) may perform various functions according to the embodiments of the present disclosure by executing the instruction stored in the memory (1903).

[0221] According to one embodiment of the present disclosure, the operation of a network entity (1900) may be caused to be performed based on at least one processor (or processing circuit) configured to perform the features of the present disclosure individually, collectively, or in any combination based on the execution of instructions (or computer program or code) stored in memory (1903), based on processing circuitry not configured to execute instructions, and / or based on components of a processing circuitry not configured to execute instructions.

[0222] 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. An uplink transmission power control method performed by a terminal of a wireless communication system, A step of receiving an RRC (radio resource control) message from a base station; A step of determining an upper and lower limit of maximum output power for uplink transmission of the terminal based on the above RRC message, wherein the upper and lower limit of the maximum output power are determined to have a negative correlation with the uplink ratio according to TDD (time division duplexing) setting information; A step of determining the maximum transmission power for uplink transmission of the terminal within the range of the upper and lower limits of the maximum output power determined above; and A step of transmitting a signal to the base station based on the maximum transmission power; A method including 2. In Paragraph 1, The step of determining the upper and lower limits of the maximum output power above is, A step of obtaining a second value, which is a parameter value for adjusting the maximum output limit according to the power class of the above terminal; and The method includes the step of determining the upper and lower limits of the maximum output power based on the second value, The above second value is, It is determined to have a negative correlation with the uplink ratio based on a first value for the uplink ratio according to the TDD configuration information included in the above RRC message, or A method determined based on at least one of information indicating an upper and lower limit of the maximum output power or information indicating a second value included in the above RRC message.

3. In Paragraph 1, The step of determining the upper and lower limits of the maximum output power above is, A step of receiving mapping information from the base station between parameter values ​​for adjusting the maximum output limit according to each of the multiple segments of the uplink ratio and the power class of the terminal; A step of verifying a first value for the uplink ratio based on TDD configuration information included in the above RRC message; A step of determining a second value corresponding to the first value among the parameter values ​​based on the mapping information; and A step of determining the upper and lower limits of the maximum output power based on the second value; A method including 4. In Paragraph 1, A step of receiving DCI (downlink control information) including information indicating a second value from the base station, wherein the second value is a parameter value for adjusting the maximum output limit according to the power class of the terminal; A step of determining an upper and lower limit of the maximum output power for an uplink transmission scheduled by the DCI based on the second value; A step of determining the maximum transmission power for an uplink transmission scheduled by the DCI within the upper and lower limits of the maximum output power for an uplink transmission scheduled by the DCI; and A step of transmitting a signal to the base station with the maximum transmission power for uplink transmission scheduled by the above DCI as an upper limit; A method that includes more.

5. In Paragraph 1, A step of transmitting capability information indicating that the uplink transmission power control method is supported to the base station; A method to include more 6. An uplink transmission power control method performed by a base station of a wireless communication system, A step of transmitting an RRC (radio resource control) message to a terminal; and The method includes the step of receiving a signal transmitted from the terminal with the upper limit of the maximum transmission power determined within the upper and lower limits of the maximum output power for the uplink transmission of the terminal. A method in which the upper and lower limits of the above maximum output power are determined to have a negative correlation with the uplink ratio according to the TDD (time division duplexing) setting information.

7. In Paragraph 6, The upper and lower limits of the maximum output power are determined based on a second value, which is a parameter value for adjusting the maximum output limit according to the power class of the terminal, wherein The above second value is, It is determined based on a first value for the uplink ratio according to the TDD configuration information included in the above RRC message, or A method determined based on at least one of information indicating an upper and lower limit of the maximum output power or information indicating a second value included in the above RRC message.

8. In Paragraph 6, A step of transmitting downlink control information (DCI) including information indicating a second value to the terminal, wherein the second value is a parameter value for adjusting a maximum output limit according to the power class of the terminal; and A step of receiving an uplink transmission scheduled by the DCI from the terminal, wherein the uplink transmission scheduled by the DCI is transmitted at a maximum transmission power within the upper and lower limits of the maximum output power determined based on the second value; A method that includes more.

9. In a terminal of a wireless communication system, At least one transceiver; At least one processor connected to the above at least one transceiver so as to be able to communicate; and The terminal is connected to communicate with at least one processor and is capable of executing individually or in any combination of the at least one processor. Step of receiving an RRC (radio resource control) message from a base station, A step of determining an upper and lower limit of maximum output power for uplink transmission of the terminal based on the above RRC message, wherein the upper and lower limit of the maximum output power are determined to have a negative correlation with the uplink ratio according to TDD (time division duplexing) setting information, A step of determining the maximum transmission power for uplink transmission of the terminal within the range of the upper and lower limits of the maximum output power determined above, and A step of transmitting a signal to the base station based on the above maximum transmission power Memory that stores instructions to execute; A terminal including 10. In Paragraph 9, The above command is, the terminal A step of obtaining a second value, which is a parameter value for adjusting the maximum output limit according to the power class of the above terminal; and Further perform the step of determining the upper and lower limits of the maximum output power based on the second value, The above second value is, It is determined to have a negative correlation with the uplink ratio based on a first value for the uplink ratio according to the TDD configuration information included in the above RRC message, or A terminal determined based on at least one of information indicating an upper and lower limit of the maximum output power or information indicating a second value included in the above RRC message.

11. In Paragraph 9, The above command is, the terminal A step of receiving mapping information from the base station between parameter values ​​for adjusting the maximum output limit according to each of the multiple segments of the uplink ratio and the power class of the terminal; A step of verifying a first value for the uplink ratio based on TDD configuration information included in the above RRC message; A step of determining a second value corresponding to the first value among the parameter values ​​based on the mapping information; and A step of determining the upper and lower limits of the maximum output power based on the second value; A terminal that causes to perform further.

12. In Paragraph 9, The above command is, the terminal A step of receiving DCI (downlink control information) including information indicating a second value from the base station, wherein the second value is a parameter value for adjusting the maximum output limit according to the power class of the terminal; A step of determining an upper and lower limit of the maximum output power for an uplink transmission scheduled by the DCI based on the second value; A step of determining the maximum transmission power for an uplink transmission scheduled by the DCI within the upper and lower limits of the maximum output power for an uplink transmission scheduled by the DCI; and A step of transmitting a signal to the base station with the maximum transmission power for uplink transmission scheduled by the above DCI as an upper limit; A terminal that causes to perform further.

13. In a base station of a wireless communication system, At least one transceiver; At least one processor connected to the above at least one transceiver so as to be able to communicate; and The base station is connected to communicate with at least one processor and is capable of executing individually or in any combination of the at least one processor. A step of transmitting an RRC (radio resource control) message to a terminal, and The memory stores an instruction to perform the step of receiving a signal transmitted from the terminal with the upper limit of the maximum transmission power determined within the upper and lower limits of the maximum output power for the uplink transmission of the terminal, wherein A base station in which the upper and lower limits of the maximum output power are determined to have a negative correlation with the uplink ratio according to TDD (time division duplexing) setting information.

14. In Paragraph 13, The upper and lower limits of the maximum output power are determined based on a second value, which is a parameter value for adjusting the maximum output limit according to the power class of the terminal, wherein The above second value is, It is determined based on a first value for the uplink ratio according to the TDD configuration information included in the above RRC message, or A base station determined based on at least one of the information indicating the upper and lower limits of the maximum output power or the information indicating the second value included in the above RRC message.

15. In Paragraph 13, The above command is, the base station A step of transmitting downlink control information (DCI) including information indicating a second value to the terminal, wherein the second value is a parameter value for adjusting a maximum output limit according to the power class of the terminal, and A step of receiving an uplink transmission scheduled by the DCI from the terminal, wherein the uplink transmission scheduled by the DCI is transmitted at a maximum transmission power within the upper and lower limits of the maximum output power determined based on the second value. A base station that enables further execution.

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