KR20190051731A - Method and apparatus for controlling power and providing power information in wirelss communication system - Google Patents

Abstract

The present disclosure relates to a method for providing power information of a terminal comprising the steps of: based on transmission power information of symbols of at least one orthogonal frequency division multiplexing (OFDM) used for uplink transmission in a slot, obtaining a transmission power reference value of the slot; determining power usage information based on the obtained transmission power reference value of the slot; and transmitting the power usage information.

Description

TECHNICAL FIELD [0001] The present invention relates to a method and apparatus for power control and power information in a wireless communication system,

The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for smoothly providing a service. Specifically, the present invention relates to a method and apparatus for power control in a wireless communication system.

Efforts have been made to develop an improved 5G communication system, a pre-5G communication system, or an NR (New Radio) system to meet the increasing demand for wireless data traffic after commercialization of the 4G communication system. For this reason, a 5G communication system or a pre-5G communication system is called a system after a 4G network (Beyond 4G network) communication system or a system after a LTE system (Post LTE).

To achieve a high data rate, 5G communication systems are being considered for implementation in very high frequency (mmWave) bands (e.g., 60 gigahertz (60 GHz), 70 gigahertz (70 GHz)) bands. In order to mitigate the path loss of the radio wave in the very high frequency band and to increase the propagation distance of the radio wave, in the 5G communication system, beamforming, massive MIMO, full-dimension MIMO (FD-MIMO ), Array antennas, analog beam-forming, and large scale antenna technologies are being discussed.

In order to improve the network of the system, the 5G communication system has developed an advanced small cell, an advanced small cell, a cloud radio access network (cloud RAN), an ultra-dense network, (D2D), a wireless backhaul, a moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation Have been developed.

In addition, in the 5G system, the Advanced Coding Modulation (ACM) scheme, Hybrid FSK and QAM Modulation (FQAM) and Sliding Window Superposition Coding (SWSC), the advanced connection technology, Filter Bank Multi Carrier (FBMC) (non-orthogonal multiple access), and SCMA (sparse code multiple access).

On the other hand, the Internet is evolving into an Internet of Things (IoT) network in which information is exchanged between distributed components such as objects in a human-centered connection network where humans generate and consume information. IoE (Internet of Everything) technology, which combines IoT technology with big data processing technology through connection with cloud servers, is also emerging. In order to implement IoT, technology elements such as sensing technology, wired / wireless communication wireless communication and network infrastructure, service interface technology, and security technology are required. In recent years, sensor network, to Machine, M2M), and MTC (Machine Type Communication). In the IoT environment, an intelligent IT (Internet Technology) service can be provided that collects and analyzes data generated from connected objects to create new value in human life. IoT is a smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliances, and advanced medical services through the fusion of existing information technology It can be applied to the field.

Accordingly, various attempts have been made to apply the 5G communication system to the IoT network. For example, technologies such as a sensor network, a machine to machine (M2M), and a machine type communication (MTC) are implemented by techniques such as beam forming, MIMO, and array antennas, which are 5G communication technologies . The application of the cloud RAN as the big data processing technology described above is an example of the convergence of 5G technology and IoT technology.

As described above, various services can be provided according to the development of a wireless communication system, and thus a method for smoothly providing such services is required.

The disclosed embodiments can provide a power control method and apparatus for effectively providing services in a wireless communication system.

According to some embodiments, a method of providing power information of a terminal in a wireless communication system includes obtaining a transmission power reference value of the slot based on transmission power information of at least one OFDM symbol used for uplink transmission in a slot step; Determining power usage information based on a transmission power reference value of the acquired slot; And transmitting the used power information.

Wherein the step of acquiring a transmission power reference value of the slot includes calculating at least one of a transmission power value of a first OFDM symbol and a transmission power value of a last OFDM symbol of at least one OFDM symbol in the slot as a transmission power reference value of the slot Can be obtained.

Obtaining the transmit power reference value of the slot may obtain an average transmit power value of the at least one OFDM symbols in the slot as the transmit power reference value.

Wherein the step of acquiring a transmission power reference value of the slot comprises calculating at least one of a maximum transmission power value and a minimum transmission power value among power values used for transmission of each of at least one OFDM symbols in the slot, Value. ≪ / RTI >

Wherein the step of determining the power usage information based on the transmission power reference value of the acquired slot comprises the step of comparing a difference value between a maximum power value that the terminal can use for uplink transmission and a transmission power reference value of the slot, .

Wherein the step of acquiring the transmission power reference value of the slot comprises: receiving control information including information on a method of acquiring a transmission power reference value of the slot from a base station; Determining a method of obtaining a transmit power reference value of the slot based on the received control information; And obtaining a transmit power reference value of the slot from transmit power information of symbols of at least one OFDM according to the determined method.

The slots may include subslots.

According to some embodiments, a method of controlling power of a terminal in a wireless communication system includes: receiving information on a power control mode; Selecting one of system information and downlink control information based on the power control mode to determine when scheduling grant information for granting data transmission of the first slot is received; And determining transmission power of the UE in the first slot based on the transmission power information included in the scheduling grant information received at the determined time point.

Wherein the step of determining when the scheduling grant information is received includes the step of selecting the downlink control information when the power control mode is the absolute value mode and selecting the system information when the power control mode is the accumulation mode, It is possible to determine when the approval information is received.

Wherein the step of determining the transmission power of the UE comprises the step of, when a plurality of scheduling grant information for data to be transmitted in the first slot is received, selecting one scheduling grant information based on a time point at which the plurality of scheduling grant information is received And determine the transmission power of the UE in the first slot based on the transmission power information in the selected scheduling grant information.

A terminal that provides power information in a wireless communication system according to some embodiments obtains a transmission power reference value of the slot based on transmission power information of symbols of at least one OFDM used for uplink transmission in a slot, At least one processor for determining power usage information based on a transmission power reference value of the acquired slot; And a transmitting / receiving unit for transmitting the used power information.

The processor may obtain at least one of a transmit power value of a first OFDM symbol and a transmit power value of a last OFDM symbol of at least one OFDM symbol in the slot as a transmit power reference value of the slot.

The processor may obtain an average transmit power value of the at least one OFDM symbols in the slot as the transmit power reference value.

The processor may obtain at least one of a maximum transmit power value and a minimum transmit power value among power values used for transmission of each of the at least one OFDM symbols in the slot as a transmit power reference value of the slot.

The processor may determine a difference value between a maximum power value that the terminal can use for uplink transmission and a transmission power reference value of the slot as the used power information.

The processor receives control information including information on how to obtain a transmission power reference value of the slot from a base station and determines a method of obtaining a transmission power reference value of the slot based on the received control information , And obtain the transmission power reference value of the slot from the transmission power information of at least one OFDM symbol according to the determined method.

The slots may include subslots.

According to some embodiments, a terminal that controls power according to transmission power information includes a transmission / reception unit that receives information on a power control mode; And selecting one of system information and downlink control information based on the power control mode to determine when scheduling grant information for granting data transmission in a first slot is received, And at least one processor for determining the transmission power of the terminal in the first slot based on the transmission power information included in the approval information.

The processor selects the downlink control information when the power control mode is the absolute value mode and determines the timing when the scheduling grant information is received by selecting the system information when the power control mode is the accumulation mode have.

Wherein the processor selects one scheduling grant based on a time point at which the plurality of scheduling grant information is received when a plurality of scheduling grant information for data to be transmitted in the first slot is received, The transmission power of the terminal in the first slot can be determined based on the transmission power information in the first slot.

According to the disclosed embodiment, a service can be effectively provided in a wireless communication system.

1 is a diagram illustrating a basic structure of a time-frequency resource region, which is a radio resource region of a CP-OFDM based wireless communication system according to some embodiments.
2 is a diagram illustrating a basic structure of a time-frequency resource region, which is a radio resource region of a wireless communication system based on SC-OFDM according to some embodiments.
3 is a diagram illustrating a method in which first type data, second type data, and third type data are allocated in a time-frequency resource area in a communication system according to some embodiments.
FIG. 4 is a diagram for explaining another method in which first type data, second type data, and third type data according to some embodiments are allocated in a time-frequency resource area.
5 is a diagram for explaining a structure of a slot and a sub slot (or minislot) in a communication system according to some embodiments.
FIG. 6 is a diagram for explaining uplink scheduling and uplink data transmission using a slot and a sub slot (or minislot) in a communication system according to some embodiments.
7 is a diagram for explaining uplink scheduling and uplink data transmission using slots in a communication system according to some embodiments.
8 is a diagram illustrating uplink transmission power according to some embodiments.
FIG. 9 shows a flowchart of a power information providing method of a terminal according to some embodiments.
FIG. 10 shows a flowchart of a power control method of a terminal according to some embodiments.
11 is a block diagram showing the structure of a terminal according to some embodiments.
12 is a block diagram showing the structure of a base station according to some embodiments.

One of the important criteria of cellular wireless communication system performance is packet data latency. To achieve this, in the LTE system, transmission and reception of signals are performed in units of subframes having a transmission time interval (TTI) of 1 ms. In the LTE system operating as described above, a terminal (shortened-TTI / shorter-TTI UE) having a transmission time interval shorter than 1 ms can be supported. Shortened-TTI terminals are expected to be suitable for services such as Voice over LTE (VoLTE) service and remote control, where latency is important. In addition, shortened-TTI terminals are expected to be a means to realize mission critical Internet of Things (IoT) on a cellular basis.

In the current LTE and LTE-A systems, a base station and a terminal are designed to transmit and receive in units of subframes with a transmission time interval of 1 ms. In order to support a shortened-TTI terminal operating in a transmission time interval shorter than 1 ms in an environment in which a base station and a terminal operating in a transmission time interval of 1 ms are present, transmission and reception operations differentiated from general LTE and LTE-A terminals are defined Needs to be. Therefore, the present invention proposes a concrete method for operating general LTE and LTE-A terminals and shortened-TTI terminals together in the same system. This can be applied to the case where TTIs of different lengths are used together in the fifth generation mobile communication system.

The present invention provides a method and an apparatus for determining a power to be transmitted by a mobile station in an uplink transmission and a method for measuring and reporting power headroom to a base station. Power control and power headroom reporting considering the characteristics of the NR system that can dynamically (dynamically) indicate the time of uplink data transmission and the situation where slot-based transmission and sub-slot or mini- ≪ / RTI > In particular, the present disclosure provides a method of determining transmission power and measuring power usage information (e.g., power headroom) in a situation where scheduling is possible with TTIs of various lengths and uplink transmission is possible at various timings do.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the embodiments of the present invention, descriptions of techniques which are well known in the technical field of the present invention and are not directly related to the present invention will be omitted. This is for the sake of clarity of the present invention without omitting the unnecessary explanation.

For the same reason, some of the elements in the accompanying drawings are exaggerated, omitted or schematically shown. Also, the size of each component does not entirely reflect the actual size. In the drawings, the same or corresponding components are denoted by the same reference numerals.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

It will be appreciated that the combinations of blocks and flowchart illustrations in the process flow diagrams may be performed by computer program instructions. These computer program instructions may be loaded into a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, so that those instructions, which are executed through a processor of a computer or other programmable data processing apparatus, Thereby creating means for performing functions. These computer program instructions may also be stored in a computer usable or computer readable memory capable of directing a computer or other programmable data processing apparatus to implement the functionality in a particular manner so that the computer usable or computer readable memory The instructions stored in the block diagram (s) are also capable of producing manufacturing items containing instruction means for performing the functions described in the flowchart block (s). Computer program instructions may also be stored on a computer or other programmable data processing equipment so that a series of operating steps may be performed on a computer or other programmable data processing equipment to create a computer- It is also possible for the instructions to perform the processing equipment to provide steps for executing the functions described in the flowchart block (s).

In addition, each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function (s). It should also be noted that in some alternative implementations, the functions mentioned in the blocks may occur out of order. For example, two blocks shown in succession may actually be executed substantially concurrently, or the blocks may sometimes be performed in reverse order according to the corresponding function.

Herein, the term " part " used in the present embodiment means a hardware component such as software or an FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit) do. However, 'part' is not meant to be limited to software or hardware. &Quot; to " may be configured to reside on an addressable storage medium and may be configured to play one or more processors. Thus, by way of example, 'parts' may refer to components such as software components, object-oriented software components, class components and task components, and processes, functions, , Subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functions provided in the components and components may be further combined with a smaller number of components and components or further components and components. In addition, the components and components may be implemented to play back one or more CPUs in a device or a secure multimedia card. Also, in an embodiment, 'to' may include one or more processors.

The wireless communication system is not limited to providing initial voice-oriented services. For example, 3GPP's High Speed Packet Access (HSPA), Long Term Evolution or Evolved Universal Terrestrial Radio Access (E-UTRA) To a broadband wireless communication system that provides high-speed, high-quality packet data services such as the LTE-A, 3GPP2 high rate packet data (HRPD), UMB (Ultra Mobile Broadband), and IEEE 802.16e communication standards. . In addition, a 5G or NR (new radio) communication standard is being developed with the fifth generation wireless communication system.

At least one service of Enhanced Mobile BroadBand (eMBB), massive Machine Type Communications (mMTC) and Ultra-Reliable and Low-Latency Communications (URLLC) may be provided to a terminal in a wireless communication system including the fifth generation. Of course, the service is not limited to the above example. Various services, including eMBB, mMTC and URLLC, can be provided to the same terminal or to different terminals during the same time period. In some embodiments, the eMBB may be a high-speed transmission of high-capacity data, mMTC may be a terminal power minimization and multiple terminal connection, and URLLC may be a service aiming at high reliability and low latency. The three services may be a major scenario in a LTE system or in a system such as 5G / NR (new radio, next radio) after LTE.

The base station can schedule the eMBB data corresponding to the eMBB service to a predetermined terminal in a transmission time interval (TTI). At this time, when a situation occurs in which the URLLC data corresponding to the URLLC service should be transmitted in the TTI in which the eMBB data is scheduled, it is necessary to schedule the eMBB data and transmit the URLLC data without transmitting a part of the eMBB data in the frequency band Lt; / RTI > According to some embodiments, the UEs scheduled for eMBB data and the UEs scheduled for URLLC data may be the same UE or may be different UEs. In such a case, there is an interval in which a part of the eMBB data that has already been scheduled and transmitted is not transmitted, so that the possibility of damaging the eMBB data may increase. Therefore, it is necessary to determine a method of receiving a signal from a terminal that is scheduled for eMBB data or a terminal that has scheduled URLLC data, and a method of processing a received signal.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification. Hereinafter, the base station may be at least one of an eNode B, a Node B, a base station (BS), a wireless access unit, a base station controller, or a node on a network. The terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing communication functions. In the present invention, a downlink (DL) is a wireless transmission path of a signal transmitted from a base station to a mobile station, and an uplink (UL) is a wireless transmission path of a signal transmitted from a mobile station to a base station. In the following, embodiments of the present invention will be described as an example of an LTE or LTE-A system, but embodiments of the present invention may be applied to other communication systems having a similar technical background or channel form. For example, 5G mobile communication technology developed after LTE-A (5G, new radio, NR) could be included. In addition, embodiments of the present invention may be applied to other communication systems by a person skilled in the art without departing from the scope of the present invention.

As a representative example of the broadband wireless communication system, a New Radio (NR) system, which is a 5G mobile communication of 3GPP, employs an Orthogonal Frequency Division Multiplexing (OFDM) scheme in a downlink (DL) (DFT-S-OFDM) or a single-carrier frequency division multiple access (SC-FDMA) scheme or a cyclic prefix (CP) -OFDM scheme. The uplink refers to a wireless link that transmits data or control signals to a terminal (User Equipment, UE) or a mobile station (MS) to a base station (gNB B or base station (BS) In the multiple access scheme, the time and frequency resources for transmitting data or control information for each user are not overlapped with each other, that is, orthogonality, So that data or control information of each user can be distinguished.

The NR system adopts a Hybrid Automatic Repeat reQuest (HARQ) scheme for retransmitting the data in the physical layer when a decoding failure occurs in the initial transmission. In the HARQ scheme, if a receiver fails to correctly decode (decode) data, the receiver transmits information indicating a decoding failure (NACK: Negative Acknowledgment) to the transmitter so that the transmitter can retransmit the corresponding data in the physical layer. The receiver combines the data retransmitted by the transmitter with the previously decoded data to improve data reception performance. In addition, when the receiver correctly decodes the data, an acknowledgment (ACK) indicating the decoding success is transmitted to the transmitter so that the transmitter can transmit new data.

1 is a diagram illustrating a basic structure of a time-frequency resource region, which is a radio resource region of a CP-OFDM based wireless communication system.

Referring to FIG. 1, in the radio resource region, a horizontal axis represents a time domain and a vertical axis represents a frequency domain. The minimum transmission unit in the time domain is an OFDM symbol. N _symb OFDM symbols 102 are gathered to constitute one slot 106, and 1 ms constitutes a subframe 105. According to some embodiments, the length of the slot is 0.5 ms, and two slots may be combined into one sub-frame 105, but the present invention is not limited to this example, and the length of the slot may be variable, The number of slots constituting the subframe of FIG.

개의 서브 캐리어(104)로 구성될 수 있다. The radio frame 114 is a time domain including 10 subframes. The minimum transmission unit in the frequency domain is a subcarrier, and the bandwidth of the entire system transmission bandwidth is a total

Carrier subcarriers < RTI ID = 0.0 > 104 < / RTI >

However, such specific values can be applied variably. For example, in the case of a 5G or NR system, it can support two types of slot structures: slots and minislots (or sub-slots) (mini-slots or non-slots). For a slot in a 5G or NR system, N _symb can be set to one of 7 or 14, and for a 5G or NR system minislot (or subslot), N _symb can be set to 1, 2, 3, 4, 5, 6, or 7, respectively.

In a time-frequency domain, a basic unit of a resource can be represented by an OFDM symbol index and a subcarrier index as a resource element (RE) 112. A resource block (RB or physical resource block) 108 may be defined as N _symb consecutive OFDM symbols 102 in the time domain and N _RB consecutive subcarriers 110 in the frequency domain. Therefore, one RB 108 in one slot may be composed of N _symb x N _RB REs 112.

According to some embodiments, the frequency-domain minimum allocation unit of data may be RB. In the NR system, N _symb = 14, N _RB = 12. Of course, N _symb = 7, N _RB = 12, and the number of OFDM symbols 102 and subcarriers 110 may be variable. N _BW and N _RB may be proportional to the bandwidth of the system transmission band. The data rate increases in proportion to the number of RBs scheduled to the UE.

According to some embodiments, the downlink transmission bandwidth and the uplink transmission bandwidth may be different from each other in the case of an FDD system operating downlink and uplink by frequency division. The channel bandwidth represents the RF bandwidth corresponding to the system transmission bandwidth. Table 1 below shows correspondence between the system transmission bandwidth and the channel bandwidth defined in the LTE system of the fourth generation mobile communication. For example, an LTE system with a 10 MHz channel bandwidth can have a transmission bandwidth of 50 RBs.

In the case of downlink control information, it may be transmitted within the first N OFDM symbols in the subframe. According to some embodiments, N = {1, 2, 3}. Therefore, the N value can be variably applied to each subframe according to the amount of control information to be transmitted in the current subframe. The control information to be transmitted may include a control channel transmission interval indicator indicating how many OFDM symbols are transmitted over the control information, scheduling information for downlink data or uplink data, and HARQ ACK / NACK information.

In the LTE system, scheduling information for downlink data or uplink data is transmitted from a base station to a mobile station through downlink control information (DCI). DCI is defined according to various formats, and it is determined according to each format whether it is a scheduling information (UL grant) for uplink data or a scheduling information (DL grant) for downlink data, a compact DCI having a small size of control information , Whether to apply spatial multiplexing using multiple antennas, whether DCI is used for power control, and so on. For example, DCI format 1, which is scheduling control information (DL grant) for downlink data, may include at least one of the following control information.

- Resource allocation type 0/1 flag: Indicates whether the resource allocation scheme is Type 0 or Type 1. Type 0 allocates resources in RBG (RBG) units by applying a bitmap method. In the LTE system, the basic unit of scheduling is an RB represented by time and frequency domain resources, and the RBG is composed of a plurality of RBs and becomes a basic unit of scheduling in the type 0 scheme. Type 1 allows a specific RB to be allocated within the RBG.

- Resource block assignment: Indicates the RB allocated to the data transmission. The resources to be represented are determined according to the system bandwidth and the resource allocation method.

- Modulation and coding scheme (MCS): Indicates the modulation scheme used for data transmission and the size of the transport block (TB) to be transmitted.

- HARQ process number: Indicates the HARQ process number.

- New data indicator: Indicates whether HARQ is initial transmission or retransmission.

- Redundancy version: Indicates the redundancy version of HARQ.

- Transmit Power Control (TPC) command for PUCCH for Physical Uplink Control CHannel: Indicates a transmission power control command for the uplink control channel PUCCH.

The DCI receives a physical downlink control channel (PDCCH) (or control information), or an Enhanced PDCCH (Enhanced PDCCH) (or enhanced control information) To be used on the network).

According to some embodiments, the DCI is independently scrambled with a specific Radio Network Temporary Identifier (RNTI) (or a terminal identifier), added with a CRC (Cyclic Redundancy Check), channel-coded, and then transmitted to an independent PDCCH . In the time domain, the PDCCH is mapped and transmitted during the control channel transmission period. The frequency domain mapping position of the PDCCH is determined by the identifier (ID) of each terminal, and can be transmitted over the entire system transmission band.

The downlink data may be transmitted on a Physical Downlink Shared CHannel (PDSCH), which is a physical channel for downlink data transmission. PDSCH can be transmitted after the control channel transmission interval, and the scheduling information such as the specific mapping position and the modulation scheme in the frequency domain is determined based on the DCI transmitted through the PDCCH.

Through the MCS among the control information configuring the DCI, the base station notifies the UE of the modulation scheme applied to the PDSCH to be transmitted and the size (Transport Block Size) of the data to be transmitted (TBS). According to some embodiments, the MCS may be composed of 5 bits or more or fewer bits. The TBS corresponds to a size before channel coding for error correction is applied to data (Transport Block, TB) to be transmitted by the base station.

The modulation schemes supported by the LTE system are QPSK (Quadrature Phase Shift Keying), 16QAM (Quadrature Amplitude Modulation), and 64QAM, and the respective modulation order (Qm) corresponds to 2, 4, and 6. That is, 2 bits per symbol for QPSK modulation, 4 bits per symbol for 16QAM modulation, and 6 bits per symbol for 64QAM modulation. In addition, 256QAM or more modulation method can be used according to the system modification.

 2 is a diagram illustrating a basic structure of a time-frequency resource region, which is a radio resource region of a wireless communication system based on SC-FDMA.

개의 서브캐리어(204)로 구성된다.

는 시스템 전송 대역에 비례하는 값을 가질 수 있다. Referring to FIG. 2, in the radio resource region, the horizontal axis represents the time domain and the vertical axis represents the frequency domain. The minimum transmission unit in the time domain is an SC-FDMA symbol 202, and N _symbUL SC-FDMA symbols may be gathered to form one slot 206. [ According to some embodiments, two slots may be aggregated to form one sub-frame 205, which is not limited to the above example. The minimum transmission unit in the frequency domain is the subcarrier, and the overall system transmission bandwidth is the total

Carriers 204. The sub-

May have a value proportional to the system transmission band.

The basic unit of resources in the time-frequency domain is a resource element (RE) 212, which can be defined as an SC-FDMA symbol index and a subcarrier index. A resource block pair (RB pair) 208 may be defined as N _symb consecutive SC-FDMA symbols in the time domain and N _RB consecutive subcarriers in the frequency domain. Therefore, one RB can be composed of N _symb x N _RB REs. According to some embodiments, the minimum transmission unit of data or control information may be a unit of RB, but is not limited to the above example. In case of PUCCH, it is mapped to a frequency region corresponding to 1 RB and transmitted for 1 sub-frame.

In the LTE system, an uplink physical channel PUCCH or PUSCH to which HARQ ACK / NACK corresponding to a PDCCH / EPDDCH including a physical channel for downlink data transmission or a semi-persistent scheduling release (SPS release) Can be defined. For example, in an LTE system operating in a frequency division duplex (FDD), a HARQ ACK / NACK corresponding to a PDCCH / EPDCCH including PDSCH or SPS release transmitted in an n-4th subframe is PUCCH or PUSCH Lt; / RTI >

In the LTE system, the downlink HARQ employs an asynchronous HARQ scheme in which the data retransmission time is not fixed. That is, when HARQ NACK is fed back from the UE to the initial transmission data transmitted from the BS, the BS freely determines the transmission time point of the retransmission data by the scheduling operation. The UE may perform buffering on the data determined to be an error as a result of decoding the received data for HARQ operation, and then perform the combining with the next retransmission data.

The TDD (Time Division Duplex) UL / DL configuration in the LTE system can be defined as shown in Table 2 below.

In Table 2, D denotes a downlink subframe, U denotes an uplink subframe, and S denotes a special subframe. Also, according to some embodiments, the special subframe may be divided into settings 0 to 10. In the case of special subframe settings 0 to 9, uplink data transmission may not be possible in the special subframe, and the special subframe setting 10 , Uplink data transmission, i.e., PUSCH transmission, may be possible in the special subframe.

According to some embodiments, the HARQ ACK / NACK information of the PDSCH transmitted in the subframe n-k may be transmitted to the base station through the PUCCH or PUSCH in the subframe n. Here, k may be defined differently according to FDD or TDD (Time Division Duplex) of the LTE system and its subframe setting. According to some embodiments, k may be fixed at 4 for FDD LTE systems. On the other hand, in case of the TDD LTE system, k may be changed according to the subframe setting and the subframe number. In addition, the value of k may be differently applied according to the TDD setting of each carrier at the time of data transmission through a plurality of carriers. In the TDD case, the k value is determined according to the TDD UL / DL setting as shown in Table 3 below.

Unlike the downlink HARQ in the LTE system, the uplink HARQ adopts a synchronous HARQ scheme in which the data transmission time is fixed. That is, a physical uplink shared channel (PUSCH), a downlink control channel (PDCCH), and a Physical Hybrid Indicator (PHICH), which is a physical channel through which a downlink HARQ ACK / NACK corresponding to a PUSCH is transmitted, The uplink / downlink timing relationship of the uplink / downlink channel can be transmitted / received according to the following rule.

When the UE receives the PDCCH including the uplink scheduling control information transmitted from the base station in the subframe n or the PHICH in which the downlink HARQ ACK / NACK is transmitted, the UE transmits uplink data corresponding to the control information in the subframe n + k PUSCH. Here, k may be defined differently depending on the FDD or TDD (time division duplex) of the LTE system and its setting. According to some embodiments, k may be fixed at 4 for FDD LTE systems. On the other hand, in case of the TDD LTE system, k may be changed according to the subframe setting and the subframe number. Also, the value of k may be differently applied according to the TDD setting of each carrier at the time of data transmission through a plurality of carriers. In the TDD case, the k value is determined according to the TDD UL / DL setting as shown in Table 4 below. In addition, the value of k may be differently applied according to the TDD setting of each carrier at the time of data transmission through a plurality of carriers.

On the other hand, the HARQ-ACK information of the PHICH transmitted in the subframe i may be related to the PUSCH transmitted in the subframe i-k. According to some embodiments, k for a FDD system may be four. That is, the HARQ-ACK information of the PHICH transmitted in the subframe i in the FDD system is related to the PUSCH transmitted in the subframe i-4. In case of a TDD system, when a terminal in which EIMTA (Enhanced Interface Managament and Traffic Adaptation) is not set has only one serving cell or all of the TDD UL / DL settings, the TDD UL / DL setting is 1 to 6 , A k value may be given in accordance with Table 5 below.

For example, in the TDD UL / DL setting 1, the PHICH transmitted in the subframe 6 may be the HARQ-ACK information of the PUSCH transmitted in the subframe 2 which is four subframes before.

If the HARQ-ACK is received in the PHICH resource corresponding to I _PHICH = 0 when the TDD UL / DL is set to 0, the PUSCH indicated by the HARQ-ACK information is transmitted from the subframe ik, 5. When the HARQ-ACK is received in the PHICH resource corresponding to IPHICH = 1 when the TDD UL / DL is set to 0, the PUSCH indicated by the HARQ-ACK information is transmitted in the subframe i-6.

을 하기의 수학식 1과 같이 계산할 수 있다. According to some embodiments, a UE that can not transmit a PUCCH and a PUSCH at the same time can use a power used for PUSCH transmission to be transmitted in a sub-frame i in a specific serving cell c

Can be calculated as shown in the following equation (1).

을 하기의 수학식 2와 같이 계산할 수 있다.In addition, according to some embodiments, a terminal capable of simultaneously transmitting a PUCCH and a PUSCH may transmit power used for PUSCH transmission to be transmitted in a subframe i in a specific serving cell c

Can be calculated by the following equation (2).

는 상기 단말이 서빙셀 c에서 서브프레임 i에 전송할 수 있는 설정된 전력이다.

는

의 선형 변화된 값이며,

는 PUCCH 전송 전력인

의 선형변화된 값이다.

는 서빙셀 c에서 서브프레임 i에 PUSCH 전송에 사용하도록 할당된 PRB 수이다.

는 상위 시그널링으로 전달된 파라미터들로 만들어지는 값이다.

는

값들 중에 하나로 상위에서 전달될 수 있다. 물론 상기 예시에 제한되는 것은 아니며,

는 1 이하의 값일 수 있다.

는 하향링크 패스로스(pathloss) 추정값으로 단말이 계산할 수 있다.

는 PUSCH에서 전송되는 제어신호 부분에 따라 결정될 수 있는 값이다. In the above equations

Is the set power that the UE can transmit in sub-frame i in the serving cell c.

The

≪ / RTI >

PUCCH < / RTI >

Lt; / RTI >

Is the number of PRBs allocated for use in the PUSCH transmission in subframe i in serving cell c.

Is a value made up of the parameters passed in the upper signaling.

The

It can be passed on from one of the values. Of course, the present invention is not limited to the above example,

May be a value of 1 or less.

Can be calculated by the UE as a downlink pathloss estimation value.

Is a value that can be determined according to the control signal portion transmitted from the PUSCH.

는 PDCCH 또는 EPDCCH의 DCI 포맷 0/4 혹은 DCI 포맷 0A/0B/4A/4B와 같은 상향링크 스케줄링을 위한 DCI포맷에 포함된 TPC 명령에 따라 설정될 수 있는 값이다. 전력제어의 누적 모드에서는

는 PDCCH 또는 EPDCCH의 DCI 포맷 0/4 혹은 DCI 포맷 0A/0B/4A/4B와 같은 상향링크 스케줄링을 위한 DCI포맷 혹은 DCI 포맷 3/3A와 같은 전력제어용 DCI포맷에 포함된 TPC 명령에 따라 설정될 수 있는 값이다.In the absolute value mode of power control

Is a value that can be set according to a TPC command included in the DCI format for uplink scheduling such as DCI format 0/4 or DCI format 0A / 0B / 4A / 4B of PDCCH or EPDCCH. In the accumulation mode of power control

May be set according to TPC commands included in DCI format for power control such as DCI format 0/4 of PDCCH or EPDCCH or DCI format for uplink scheduling such as DCI format 0A / 0B / 4A / 4B or DCI format 3 / 3A It is possible value.

는 전력제어에서 누적설정이 되어 있지 않고 절대값 모드로 설정이 되었다면

와 같이 계산될 수 있으며, 누적모드에서는

와 같이 계산될 수 있다.In the above,

Is set to the absolute value mode without being cumulatively set in the power control

, And in the accumulation mode

Can be calculated as follows.

는 4이며, TDD에서는

가 가리키는 값이 하기와 같은 표 6과 같이 제공될 수 있을 것이다.In the FDD system,

Is 4, and in TDD

May be provided as shown in Table 6 below.

값을 정하는 방법이 상황에 따라 달라질 수 있다. 예를 들면, TDD UL/DL 설정이 0일 때, 서브프레임 2 또는 서브프레임 7에서 전송하게 될 PUSCH의 스케줄링 정보를 상향링크 DCI 포맷의 UL index의 LSB가 1인 PDCCH/EPDCCH를 통하여 수신하였으면 상기

을 7로 가정한다. 이외의 경우에는 상기 표 6을 따라

를 결정한다.According to some embodiments, in the case of TDD UL / DL setting 0

How to set the value depends on the situation. For example, if the TDD UL / DL setting is 0 and the scheduling information of the PUSCH to be transmitted in the subframe 2 or the subframe 7 is received through the PDCCH / EPDCCH with the LSB of the UL index of the uplink DCI format being 1,

Is assumed to be 7. Otherwise, follow Table 6 above.

.

The description of the wireless communication system is based on the LTE system, and the contents of the present invention are not limited to the LTE system but can be applied to various wireless communication systems such as NR and 5G. Also, according to some embodiments, the k value may be applied to a system using a modulation scheme corresponding to FDD when applied to another wireless communication system.

Also, the CP-OFDM or SC-FDMA based wireless communication system shown in FIGS. 1 and 2 may be at least one of LTE, LTE-A, and 5G systems, FDMA-based wireless communication system is not limited to the above-described example. Also, CP-OFDM or SC-FDMA can be used in uplink or downlink communication, and is not limited to the above example.

3 is a diagram illustrating a method in which first type data, second type data, and third type data are allocated in a time-frequency resource area in a communication system according to some embodiments.

Referring to FIG. 3, first type data 301, second type data 303, 305, and 307, and third type data 309 may be allocated in the entire system frequency band 300. According to some embodiments, when the first type data 301 and the third type data 309 are allocated and transmitted in a specific frequency band and the second type data 303, 305, and 307 are generated to be transmitted, The first type data 301 and the third type data 309 may transmit the second type data 303, 305, 307 without emptying the already allocated portion or transmitting the same.

According to some embodiments, the first type data 301 may be data corresponding to the first type service. The first type service may include an eMBB service and may include a service corresponding to a service requiring high-speed data transmission or performing a broadband transmission. In addition, the first type data 301 may include eMBB data corresponding to the eMBB service.

According to some embodiments, the second type data (303, 305, 307) is data corresponding to the second type service. The second type service may include a URLLC service and may include a service requiring a low latency or a high reliability transmission, or another service requiring a low latency and high reliability at the same time. Also, the second type data 303, 305, and 307 may include URLLC data corresponding to the URLLC service.

According to some embodiments, the third type data 309 may be data corresponding to the third type service. The third type service may include the mMTC service and may include services that require low speed, wide coverage, or low power. In addition, the third type data 309 may include mMTC data corresponding to the mMTC service.

The structures of the physical layer channels used for each type for transmitting the first type data 301, the second type data 303, 305, and 307, and the third type data 309 may be different from each other. For example, at least one of a transmission time interval (TTI) length, a frequency resource allocation unit, a control channel structure, and a data mapping method may be different. More specifically, the length of a transmission time interval (TTI) used for transmission of URLLC data may be shorter than the length of a TTI used for transmission of eMBB data or mMTC data. In addition, the response of the information related to the URLLC service can be transmitted faster than the eMBB service or the mMTC service, and thus the information can be transmitted / received with a low delay.

In the present embodiment, the eMBB data is the first type data 301, the URLLC data is the second type data 303, 305 and 307, and the mMTC data is the third type data 309. However, And each type of data is not limited thereto.

According to some embodiments, the second type data 303, 305, 307 may be required to reduce the delay time, wherein at least one of the first type data 301 or the third type data 309 is assigned The second type data 303, 305, and 307 may be allocated and transmitted to a part of the resources. Of course, when at least one of the first type data 301 or the third type data 309 is further allocated and transmitted with the second type data 303, 305, 307 in the allocated resource, redundant frequency-time resources The first type data 301 or the third type data 309 may not be transmitted and therefore the transmission performance of at least one of the first type data 301 or the third type data 309 may be lowered. That is, transmission failure of at least one of the first type data 301 or the third type data 309 due to the allocation of the second type data 303, 305, and 307 may occur.

FIG. 4 is a diagram for explaining another method in which first type data, second type data, and third type data according to some embodiments are allocated in a time-frequency resource area.

Referring to FIG. 4, services and data may be transmitted using each subband 402, 404, 406, which is divided by the entire system frequency band 400, in accordance with some disclosed embodiments. According to some embodiments, the information associated with the subband setting may be predetermined. In addition, the base station can transmit the corresponding information through the upper signaling to the mobile station. Or information related to the subbands 402, 404, and 406 may be arbitrarily set by the base station or the network node to provide services to the terminal without transmitting the subband configuration information. In FIG. 4, the first subband 402 is transmitted by the first type data transmission 408, the second subband 404 is transmitted by the second type data 410, 412 and 414, 3 type data 416 may be used for transmission.

According to some embodiments, the length of the transmission time interval (TTI) used for the second type data transmission may be shorter than the TTI length used for transmission of the first type data or the third type data. In addition, the response of the information related to the second type data can be transmitted faster than the first type data or the second type data, so that information can be transmitted / received with a low delay.

5 is a diagram for explaining a structure of a slot and a sub slot (or minislot) in a communication system according to some embodiments.

According to some embodiments, in the NR system, a structure called a subslot may be introduced to enable data transmission with a length shorter than a slot. A subslot may also be referred to as a minislot in other terms, and in the present disclosure, a minislot or a sublot may be used interchangeably.

According to some embodiments, slots 501, 503, 505, and 507 in the NR system are comprised of 14 OFDM symbols. Of course, the number of OFDM symbols may be variable. Also, according to some embodiments, subslot 510 may vary in length from one symbol to thirteen symbols.

According to some embodiments, in a TDD system or the like, even if downlink data is transmitted in one slot, downlink data can be transmitted in a number of OFDM symbols smaller than 14 symbols. Also according to some embodiments, the length of a sub-slot for a particular terminal may be set and communicated from the base station by at least one or at least one combination of system information (SIB), higher signaling, and DCI indication.

FIG. 6 is a diagram for explaining uplink scheduling and uplink data transmission using slots and sub-slots or minislots in a communication system according to some embodiments.

According to some embodiments, the NR system may indicate an uplink data transmission time point in a UL scheduling grant signal, which is a scheduling grant of uplink data transmission. Referring to FIG. 6, the uplink scheduling grant signal transmitted to the slot n (601) may be information on uplink data to be transmitted in the slot n + 3 (607).

According to some embodiments, the uplink scheduling grant signal 611 delivered to the UE in slot n 601 may be scheduling information for uplink data transmitted in slot n + 3 607, The uplink scheduling grant signal 613 transmitted to the UE in step 603 may be the scheduling information on the uplink data transmitted in the slot n + 4 609. Of course, the present invention is not limited to the example of FIG. 6, and the scheduling of the uplink scheduling grant signal may be variable.

Also, according to some embodiments, the uplink scheduling grant signals 611 and 613 may include at least one of information on an uplink data transmission time point and information on transmit power control (TPC). Of course, the present invention is not limited to the above example.

Also, according to some embodiments, the uplink scheduling grant signal 615 for the sub-slot transmitted to the UE in the first sub-slot 617 of FIG. 6 is transmitted in the uplink data transmission And the uplink scheduling grant signal 615 for the sub slot may include at least one of information on the uplink transmission time and information on the transmission power.

As described above, the eMBB service described below may be the first type service, and the eMBB data may be the first type data. The first type service is not limited to the eMBB service and may include other services that require high-speed data transmission or perform broadband transmission. The first type data is also not limited to eMBB data.

Also according to some embodiments, the URLLC service may be a second type service and the data for URLLC may be second type data. The second type service is not limited to the URLLC service, and may include other services requiring low latency or requiring high reliability transmission, or requiring low latency and high reliability at the same time. The second type data is also not limited to URLLC data.

Also according to some embodiments, the mMTC service may be a third type service, and the data for mMTC may be third type data. The third type of service is not limited to the mMTC service but may include other services that require low speed, wide coverage, or low power. Third type data is also not limited to mMTC data. Also, in describing the embodiment, the first type service may or may not include the third type service, and the first type data may or may not include the third type data.

Although three services and three pieces of data have been described above, more types of services and corresponding data may exist, and the contents of the present invention may be applied to this case as well.

To describe the method and apparatus proposed in this disclosure, the terms physical channel and signal in a conventional LTE or LTE-A system may be used. However, the present invention can be applied to other wireless communication systems other than LTE and LTE-A systems. For example, the contents of this disclosure may be applied in a 5G or NR system.

In the following description, the transmission and reception operations of a terminal and a base station for transmission of data of a first type, a second type and a third type are defined, and terminals receiving different types of services or data scheduling are grouped together in the same system We suggest a concrete method for operating. In the present disclosure, the first type, the second type, and the third type terminal are terminals that have been subjected to the first type, the second type, the third type service, or data scheduling, respectively. In an embodiment, the first type terminal, the second type terminal and the third type terminal may be the same terminal or may be different terminals.

In the following embodiments, a signal transmitted from the base station to the mobile station may be a first signal if it is a signal expecting a response from the terminal, and a response signal of the terminal corresponding to the first signal may be the second signal. For example, at least one of an uplink scheduling grant signal and a downlink data signal may be a first signal. Also, at least one of the uplink data signal for uplink scheduling grant and the HARQ ACK / NACK for the downlink data signal may be a second signal. Of course, the present invention is not limited to the above example.

Also, according to some embodiments, the service type of the first signal may be at least one of eMBB, URLLC, and mMTC, and the second signal may also correspond to at least one of the services. For example, in LTE and LTE-A systems, PUCCH format 0 or 4 and PHICH may be the first signal, and the corresponding second signal may be PUSCH. For example, in the LTE and LTE-A systems, the PDSCH may be the first signal, and the PUCCH or PUSCH including the HARQ ACK / NACK information of the PDSCH may be the second signal. Of course, the present invention is not limited to the above example.

Also, according to some embodiments, a PDCCH / EPDCCH including an aperiodic CSI trigger may be a first signal, and a corresponding second signal may be a PUSCH including channel measurement information . Of course, the present invention is not limited to the above example.

Further, in the following embodiments, when the base station transmits the first signal in the n-th TTI, and the terminal transmits the second signal in the n + k-th TTI, the base station informs the terminal of the timing to transmit the second signal May be the value of k. Assuming that the BS transmits the second signal in the n + 4 + a TTI when the BS transmits the first signal in the n-th TTI, when the BS informs the MS of the timing to transmit the second signal, It may be informing the value a. Of course, the present invention is not limited to the above example, and the offset may be defined in various ways such as n + 3 + a and n + 5 + a instead of n + 4 + a. Also, the value of n + 4 + a mentioned in this disclosure can likewise be defined by various methods without limitation the offset a value.

Although the contents of the present disclosure are described on the basis of the FDD LTE system, they can also be applied to communication systems such as a TDD system and an NR system.

In the present disclosure, upper signaling may refer to a signaling method that is transmitted from a base station to a terminal using a downlink data channel of a physical layer or from a terminal to a base station using an uplink data channel of a physical layer, and RRC signaling Radio Resource Control (PDC), or Packet Data Convergence Protocol (PDCP) signaling, or a MAC control element (MAC CE).

In the present invention, the uplink data transmission can be mixed with the PUSCH, and the uplink control signal transmission can be mixed with the PUCCH. The PUSCH may include at least one of data to be transmitted in uplink, channel measurement information, HARQ-ACK for downlink data transmission, and scheduling request bits, and is not limited to the above example. According to some embodiments, the PUCCH may include at least one of HARQ-ACK, channel measurement information, and scheduling request bits for downlink data transmission, and is not limited to the above example.

The fact that the absolute value mode is set for power control in the present invention means that the Accumulation-enabled parameter is set to off in the upper signaling and that the Accumulation-enabled parameter is set to on in the upper signaling can do. According to some embodiments, on / off of the parameter may be represented by a flag.

7 is a diagram for explaining uplink scheduling and uplink data transmission using slots in a communication system according to some embodiments.

According to some embodiments, when a power control is applied for uplink data transmission of a terminal, when a scheduling grant signal for uplink transmission in a specific slot is transmitted in two or more slots, Explain.

According to some embodiments, the power for transmitting the uplink data PUSCH of the UE can be calculated by Equation (3).

는 상기 단말이 서빙셀 c에서 서브프레임 i에 전송할 수 있는 설정된 전력이다.

는

의 선형 변화된 값이다.

는 서빙셀 c에서 서브프레임 i에 PUSCH 전송에 사용하도록 할당된 PRB 수이다.

는 상위 시그널링으로 전달된 파라미터들로 만들어지는 값이다.

는

값들 중에 하나로 상위에서 전달될 수 있다. 물론 상기 예시에 제한되는 것은 아니며,

는 1 이하의 값일 수 있다.

는 안테나포트 quasi-collocation 설정 q와 관련된 서빙셀 c에서의 하향링크 패스로스(pathloss) 추정 값으로 단말이 계산할 수 있다.

는 PUSCH에서 전송되는 제어신호 부분에 따라 결정될 수 있는 값이다.

의 상향링크 스케줄링을 위한 DCI포맷에 포함된 TPC 명령에 따라 설정될 수 있는 값이다.In the above equations

Is the set power that the UE can transmit in sub-frame i in the serving cell c.

The

Lt; / RTI >

Is the number of PRBs allocated for use in the PUSCH transmission in subframe i in serving cell c.

Is a value made up of the parameters passed in the upper signaling.

The

It can be passed on from one of the values. Of course, the present invention is not limited to the above example,

May be a value of 1 or less.

Can be calculated by the UE as a downlink pathloss estimate value in the serving cell c associated with the antenna port quasi-collocation setting q.

Is a value that can be determined according to the control signal portion transmitted from the PUSCH.

Lt; RTI ID = 0.0 > TPC < / RTI > commands included in the DCI format for uplink scheduling.

는 전력제어에서 누적설정이 되었다면,

와 같이 계산할 수 있다. 상기에서

는 전력제어에서 누적설정이 되어 있지 않고 절대값 모드로 설정이 되었다면

와 같이 계산할 수 있다.

[dB]는 슬롯

의 PDCCH에서 전송되는 DCI에 포함된 TPC 비트필드에서 가리키는 값이다.

값은 슬롯

의 PDCCH에서 전송되는 DCI에 포함된 상향링크 타이밍 정보에서 가리키는 값일 수 있다. 상기 DCI에 포함된 상향링크 타이밍 정보에서 가리키는 값은, 미리 SIB 혹은 시스템 관련 정보 혹은 상위시그널링으로 설정된 값들 중에서 하나가 될 수 있다. In the above,

Is set to a cumulative setting in the power control,

Can be calculated as follows. In the above,

Is set to the absolute value mode without being cumulatively set in the power control

Can be calculated as follows.

[dB] is the slot

Lt; RTI ID = 0.0 > TPC < / RTI > bit field included in the DCI transmitted on the PDCCH of FIG.

The value is the slot

May be a value indicated by the uplink timing information included in the DCI transmitted on the PDCCH of FIG. The value indicated by the uplink timing information included in the DCI may be one of the values set in SIB or system related information or upper signaling in advance.

를 결정한다. 즉, 슬롯

의 PDCCH에서 전송되는 DCI가 슬롯 i에서의 PUSCH 전송을 스케줄링 할 때, 상기 슬롯 i에서의 PUSCH 전송을 스케줄링하는 DCI가 전송된 슬롯

에서

가 가장 작은 값과 해당 슬롯에서의 DCI의 TPC 정보를 이용한다. If the PDCCH scheduling the PUSCH transmission in the slot i is transmitted to more than one slot or more than one slot, the TPC information of the DCI including the most recently received uplink scheduling information is used

. That is,

When the DCI transmitted on the PDCCH of the slot i schedules the PUSCH transmission in the slot i, the DCI scheduling the PUSCH transmission in the slot i is transmitted in the slot

in

And the TPC information of the DCI in the corresponding slot.

Referring to FIG. 7, uplink data transmission in slot n (701) and slot n + 1 (703) is scheduled in slot n + 3, and the uplink scheduling signal transmitted in each slot May be signals 711, 713 containing information (TPC). According to some embodiments, the UE may ignore the DCI information associated with the uplink grant signal 711 received in slot n and use the DCI information associated with the uplink grant signal 713 received in slot n + 1 PUSCH transmission and transmission power. According to some embodiments, the UE determines that the scheduling information transmitted to the UE by the BS most recently is the most reliable, and determines the PUSCH transmission and transmission power according to the method.

In addition, according to some embodiments, a method of determining a transmission power of a UE for determining timing based on system information or a higher signaled value when power control is applied for uplink data transmission of the UE will be described.

Also, according to some embodiments, the power for transmitting the uplink data PUSCH of the UE can be calculated by Equation (4).

는 상기 단말이 서빙셀 c에서 서브프레임 i에 전송할 수 있는 설정된 전력이다.

는

의 선형 변화된 값이다.

는 서빙셀 c에서 서브프레임 i에 PUSCH 전송에 사용하도록 할당된 PRB 수이다.

는 상위 시그널링으로 전달된 파라미터들로 만들어지는 값이다.

는

값들 중에 하나로 상위에서 전달될 수 있다. 물론 상기 예시에 제한되는 것은 아니며,

는 1이하의 값일 수 있다.

는 안테나포트 quasi-collocation 설정 q와 관련된 서빙셀 c에서의 하향링크 패스로스(pathloss) 추정값으로 단말이 계산할 수 있다.

는 PUSCH에서 전송되는 제어신호 부분에 따라 결정될 수 있는 값이다.

의 상향링크 스케줄링을 위한 DCI포맷에 포함된 TPC 명령에 따라 설정될 수 있는 값이다.In the above equations

Is the set power that the UE can transmit in sub-frame i in the serving cell c.

The

Lt; / RTI >

Is the number of PRBs allocated for use in the PUSCH transmission in subframe i in serving cell c.

Is a value made up of the parameters passed in the upper signaling.

The

It can be passed on from one of the values. Of course, the present invention is not limited to the above example,

May be a value of 1 or less.

Can be calculated by the UE as a downlink pathloss estimate in the serving cell c associated with the antenna port quasi-collocation setting q.

Is a value that can be determined according to the control signal portion transmitted from the PUSCH.

Lt; RTI ID = 0.0 > TPC < / RTI > commands included in the DCI format for uplink scheduling.

는 전력 제어에서 누적 설정이 되었다면,

와 같이 계산할 수 있다. 상기 누적 설정이 되었을 때,

[dB]는 슬롯

의 PDCCH에서 전송되는 DCI에 포함된 TPC 비트필드에서 가리키는 값이다.

값은 MIB (master information block), RMSI (remaining system information), OSI (other system information), SIB (system information block) 또는 시스템 관련 정보 또는 상위시그널링으로 설정된 값들 중에서 하나일 수 있다. According to some embodiments, it may be possible to determine the timing differently according to the power control accumulation setting, as described below. In the above,

Is set to a cumulative setting in the power control,

Can be calculated as follows. When the cumulative setting is reached,

[dB] is the slot

Lt; RTI ID = 0.0 > TPC < / RTI > bit field included in the DCI transmitted on the PDCCH of FIG.

The value may be one of a master information block (MIB), remaining system information (RMSI), other system information (OSI), system information block (SIB), or system related information or values set as upper signaling.

값은 UE(User Equipment) 성능(capability)에 따라 결정되는 값일 수 있다. 다시 말해서, 단말이 기지국에게 보고하는 UE capability에 따라

값이 결정될 수 있다. 또한

은 실제로 상향링크 스케줄링 승인 정보를 포함한 DCI 전송된 시점이 아닐 수 있음에 유의하여야한다. According to some embodiments,

The value may be a value determined according to UE (User Equipment) capability. In other words, depending on the UE capability reported to the base station

Value can be determined. Also

It should be noted that the DCI transmission time point may not be the DCI transmission time point including the uplink scheduling grant information.

는 전력제어에서 누적설정이 되어 있지 않고 절대값 모드로 설정이 되었다면

와 같이 계산할 수 있다.

[dB]는 슬롯

의 PDCCH에서 전송되는 DCI에 포함된 TPC 비트필드에서 가리키는 값이다.

값은 슬롯

의 PDCCH에서 전송되는 DCI에 포함된 상향링크 타이밍 정보에서 가리키는 값일 수 있다. 상기 DCI에 포함된 상향링크 타이밍 정보에서 가리키는 값은, 미리 SIB 혹은 시스템 관련 정보 혹은 상위시그널링으로 설정된 값들 중에서 하나가 될 수 있다. 일부 실시예에 따르면,

값은 상기 PUSCH를 스케줄링하는 DCI가 전송되는 시점과 해당 PUSCH 전송되는 시점의 차이를 가리키는

값과 다를 수 있으며, 물론 상기 예시에 제한되는 것은 아니다. Also, according to some embodiments,

Is set to the absolute value mode without being cumulatively set in the power control

Can be calculated as follows.

[dB] is the slot

Lt; RTI ID = 0.0 > TPC < / RTI > bit field included in the DCI transmitted on the PDCCH of FIG.

The value is the slot

May be a value indicated by the uplink timing information included in the DCI transmitted on the PDCCH of FIG. The value indicated by the uplink timing information included in the DCI may be one of the values set in SIB or system related information or upper signaling in advance. According to some embodiments,

Value indicates the difference between the time at which the DCI scheduling the PUSCH is transmitted and the time at which the PUSCH is transmitted

Value, and is of course not limited to the above example.

In the present invention, it is assumed that the UE receives the DCI including the UL grant information. However, the UE receives the DCI of the group-common type simultaneously transmitted to the UEs, The TPC information of FIG. In other words, embodiments of the present disclosure can be applied to receiving downlink control information in group units.

8 is a diagram illustrating uplink transmission power according to some embodiments. Referring to FIG. 8, there is shown a change in power of uplink data or uplink control signal transmitted in slot n, slot n + 1, and slot n + 2. It is assumed that the first uplink data 812 transmitted in slot n 802 is transmitted using power P1 832. The second uplink data 814 transmitted in the slot n + 1 804 uses the power P2 834 and the third uplink data 816 is transmitted using the power P4 838. [ The fourth uplink data 818 transmitted in the slot n + 2 806 uses the power P3 836, the fifth uplink data 820 uses the power P5 840, Data 822 is transmitted using power P3 836. [

In some embodiments, the terminal may perform a power headroom report (PHR). When the UE performs the PHR in the slot n 802, the power headroom (PH) is set to Pcmax, c (842), which is the maximum power that the UE can use for uplink transmission in the serving cell c, The difference 844 of the used power 832 is reported in PH. If the power used for actual transmission in the slot does not change as in the slot n 802, the power difference 844 in the slot can be reported as described above. However, when the power used for the actual transmission is changed, such as slot n + 1 804 or slot n + 2 806, it may be necessary to decide what value to report to the power headroom (PH).

와

를 계산하여 최소값을 전송 전력으로 계산한다. 상기에서 계산된 값은

를 의미할 수 있다. 즉, 단말이 PH를 계산할 때에는

와

의 차이를 의미하는 것일 수 있다. 본 개시에서 기준이 되는 전송전력이라 함은, 실제 전송에 사용된 전력일 수 있고, 혹은 실제 전송에 사용된 전력이 아니라

로 계산된 전력일 수 있다. 따라서 하기에서 전송전력이

를 의미할 때에는, 슬롯 i에서 단말이 전송에 실제 사용한 전력은

가 아닐 수 있음에 유의하여야한다. 즉, 전력헤드룸(PH)는 Pcmax, c와 실제 전송전력의 차이가 아닐 수 있음에 유의하여야한다는 것이다.In the above, the power used for the actual transmission may be a value calculated by the terminal in the calculation of the transmission power. For example, in Equation (4) above,

Wow

And calculates the minimum value as the transmission power. The values calculated above

. ≪ / RTI > That is, when the terminal calculates the PH

Wow

The difference between the two. The transmit power referred to in this disclosure may be the power used for the actual transmission or the power used for the actual transmission

≪ / RTI > Therefore,

, The power actually used by the terminal in the transmission in the slot i is

It should be noted that it may not be. That is, it should be noted that the power headroom (PH) may not be the difference between Pcmax, c and the actual transmission power.

According to some embodiments, if the power used for actual transmissions in a slot changes, at least one of the following methods may be considered to determine the reported PH.

According to some embodiments, the UE can report the PH based on the transmission power of the first OFDM symbol among OFDM symbols used for uplink transmission in the slot. According to another embodiment, the UE can report the PH based on the transmission power of the last OFDM symbol among OFDM symbols used for uplink transmission in a slot. Also, according to another embodiment, the UE can report the PH based on the average value of the transmission power used in the OFDM symbols used for the uplink transmission in the slot. According to another embodiment, the UE can report the PH based on the maximum value of the transmission power used in the OFDM symbols used for the uplink transmission in the slot. According to another embodiment, the UE can report the PH based on the minimum value of the transmission power used in the OFDM symbols used for the uplink transmission in the slot.

Of course, the present invention is not limited to the above example, and the UE can determine based on the transmission power values of at least one of the OFDM symbols applied to the uplink transmission in the slot.

를 이용하여 sounding reference signal (SRS) 혹은 PUCCH 전송을 위한 전력을 결정하는데 적용하는 것이 가능할 것이다. 즉 지연감소모드로 설정한 단말의 상향링크 전송을 위한 전력을 제어하는데 상기 실시예들이 적용될 수 있다.Although a power control method for PUSCH transmission has been described above,

It is possible to apply it to determine the sounding reference signal (SRS) or power for PUCCH transmission. That is, the above embodiments may be applied to control power for uplink transmission of a UE set in a delay reduction mode.

FIG. 9 shows a flowchart of a power information providing method of a terminal according to some embodiments.

As described above, when power used for uplink transmission in one slot or one sub slot is changed, the UE can determine which power value to provide based on the power value. A value serving as a reference for providing power information used in a slot may be referred to as a transmission power reference value of the slot.

In step 920, the UE can acquire the transmission power reference value of the slot based on the transmission power information of symbols of at least one OFDM used in the uplink transmission in the slot.

According to some embodiments, the terminal may obtain the transmit power value of the first of the at least one OFDM symbols in the slot as the transmit power reference value of the slot. Also, according to some embodiments, the terminal may acquire the transmit power value of the last OFDM symbol among the at least one OFDM symbols in the slot as the transmit power reference value of the slot.

Additionally, according to some embodiments, the terminal may obtain an average transmit power value of at least one OFDM symbols in a slot as a transmit power reference value. Also according to some embodiments, the terminal may obtain a maximum transmit power value among power values used for transmission of each of at least one OFDM symbols in a slot as a transmit power reference value of the slot. Also in accordance with some embodiments, the terminal may obtain a minimum transmit power value among the power values used for transmission of each of the at least one OFDM symbols in the slot as the transmit power reference value of the slot. In other words, the terminal can determine the transmission power reference value of the slot according to various methods.

According to some embodiments, the terminal also includes a method of receiving control information including information on a method of acquiring a transmission power reference value of a slot from a base station and acquiring a transmission power reference value of the slot based on the received control information And obtain a transmission power reference value of the slot from the transmission power information of at least one OFDM symbol according to the determined method.

For example, the UE can acquire control information such as a Radio Resource Control (RRC) parameter. In the obtained control information, information on how to obtain the transmission power reference value of the slot may be included. Specifically, the control information includes at least one of a transmission power value of a first OFDM symbol of at least one OFDM symbol in a slot, a transmission power value of a last OFDM symbol, an average transmission power value of at least one OFDM symbol in a slot, A maximum transmission power value among power values used for transmission of each OFDM symbol and a minimum transmission power value among power values used for transmission of each of at least one OFDM symbols in a slot is determined as a transmission power reference value of the slot Information about whether or not to do so.

Also, according to some embodiments, the terminal may determine, based on control information, such as an RRC parameter, which OFDM symbols of the at least one OFDM symbol in the slot to transmit usage power information (e.g., power headroom information) have. In other words, the RRC parameter may include information for requesting and indicating to transmit the usage power information of a predetermined OFDM symbol.

The slots described above may also include subslots. Specifically, the examples described with respect to slots in this disclosure can be applied equally to all subslot structures. Accordingly, the UE may acquire the transmission power reference value of the sub slot and provide the used power information for each sub slot.

In step 940, the UE can determine the power usage information based on the transmission power reference value of the acquired slot.

According to some embodiments, the usage power information may be information about the power that the terminal is intended to use, use, or use. The used power information may be information on power used to transmit uplink data, but is not limited to the above example.

Also, according to some embodiments, the power usage information may be power headroom information.

According to some embodiments, the UE can determine the difference between the maximum power value that the UE can use for the uplink transmission and the transmission power reference value of the slot as the used power information.

According to some embodiments, the transmission power reference value may be the power that the terminal uses in the actual transmission, or the terminal may be a calculated value of the transmission power by a predetermined equation.

According to some embodiments, a predetermined equation for calculating a transmission power of a UE includes physical resource block (PRB) information, parameters delivered to upper signaling, attenuation compensation, downlink path loss, control signals transmitted in the uplink, And transmission power information included in the control information for link scheduling.

와

를 계산한 값 중 최소값을 전송 전력으로 계산할 수 있다. 단말이 전송 전력을 계산한 값은

의 수식에 의해 계산된 값을 의미할 수 있으며, 이 수식에 의해 계산된 값이 전송 전력 기준 값일 수 있다. According to some embodiments, in Equation (4) described above,

Wow

The minimum value of the calculated values can be calculated as the transmission power. The value that the terminal calculates the transmission power is

, And the value calculated by this formula may be a transmission power reference value.

와

의 차이를 의미하는 것이고, 전송 전력 기준 값은 실제 전송에 사용된 전력 또는

에 의해 계산된 전력일 수 있다. 물론 단말의 전력의 계산은, 상기에서 제시된 수식에 한정될 필요 없으며, 다양한 수식에 의해 결정되는 방법일 수 있다. In other words,

Wow

, And the transmission power reference value means the difference between the power used for actual transmission or

Lt; / RTI > Of course, the calculation of the power of the terminal need not be limited to the above-described formula, but may be a method determined by various formulas.

를 의미할 때에는, 슬롯 i에서 단말이 전송에 실제 사용한 전력은

가 아닐 수 있음에 유의하여야한다. 즉, 전력 헤드룸(PH)는 Pcmax, c와 실제 전송전력의 차이가 아닐 수도 있다.Therefore, the transmission power reference value of the slot is

, The power actually used by the terminal in the transmission in the slot i is

It should be noted that it may not be. That is, the power headroom PH may not be the difference between Pcmax, c and the actual transmission power.

를 넘는 경우에는 수식

에 의해 계산된 전송 전력 기준 값과

차이 값일 수 있고, 계산된 전송 전력 기준 값이

를 넘지 않는 경우 실제 전송에 사용된 전력과

값의 차이일 수 있다.Also, according to some embodiments, the power usage information may include a calculated transmit power reference value

, The equation

And the transmission power reference value calculated by

Difference value, and the calculated transmission power reference value

The power used for the actual transmission and

It may be a difference in value.

In step 960, the terminal may transmit usage power information.

According to some embodiments, the terminal may transmit usage power information to the base station. Also, according to some embodiments, the terminal may transmit power headroom information to the base station.

According to some embodiments, the base station can receive the power usage information and can determine, based on the power usage information, how the transmission power reference value of the slot is determined.

For example, the base station receives the power usage information, and based on the received information, the transmission power reference value of the slot is determined based on the transmission power value of the first OFDM symbol among the at least one OFDM symbols in the slot Whether or not the used power information is determined based on the transmission power value of the last OFDM symbol, whether the used power information is determined based on the average transmission power value of the at least one OFDM symbols in the slot, whether each of the at least one OFDM symbols in the slot The used power information is determined on the basis of the maximum transmission power value among the power values used for transmission of the OFDM symbols in the slot, and the used power information is calculated based on the minimum transmission power value among the power values used for transmission of each of the at least one OFDM symbols in the slot It can be judged whether or not it is judged.

According to some embodiments, the base station can control the transmission power of the terminal based on the power usage information.

FIG. 10 shows a flowchart of a power control method of a terminal according to some embodiments.

In step 1020, the terminal may receive information regarding the power control mode.

According to some embodiments, the power control mode may include an accumulation mode and an absolute value mode (or an absolute mode). The power control mode can be determined through the parameters of the higher signaling. The terminal may receive control information, information on the power control mode included in the system information, or a separate power control mode.

According to some embodiments, in the absolute value mode of the power control mode, the transmission power of each slot can be controlled independently of the other slots. In the case of the accumulation mode, by accumulating the accumulated power in the previous slot, Power can be controlled.

In step 1040, the UE may select one of the system information or the downlink control information based on the power control mode to determine when scheduling grant information for granting data transmission of the first slot is received.

According to some embodiments, the UE may select the downlink control information when the power control mode is the absolute value mode, and determine timing when the scheduling grant information is received by acquiring the timing information included in the downlink control information.

According to some embodiments, the UE can select the system information when the power control mode is the accumulation mode, and determine timing when the scheduling grant information is received by acquiring the timing information included in the selected system information.

According to some embodiments, the timing information included in the system information may be fixed, and the timing information included in the downlink control information may be dynamic. In other words, the downlink control information can dynamically indicate the transmission time point of the uplink data.

According to some embodiments, the system information may include at least one of a master information block (MIB), a remaining system information (RMSI), other system information (OSI), a system information block (SIB) It may be one of the values set by signaling. Of course, the present invention is not limited to the above example.

In step 1060, the UE can determine the transmission power of the UE in the first slot based on the transmission power information included in the scheduling grant information received at the determined time.

According to some embodiments, when a plurality of scheduling grant information for data to be transmitted in the first slot is received, the UE selects one scheduling grant based on a timing at which the plurality of scheduling grant information is received, The transmission power of the terminal in the first slot can be determined based on the transmission power information in the information.

For example, when a plurality of scheduling grant information for the first slot of the terminal is received, the scheduling grant information for the first slot is received based on information on the transmission power included in the most recently received scheduling grant information based on the received time point or slot, The transmission power of the terminal can be determined.

The slots described above may also include subslots. Specifically, the examples described with respect to slots in this disclosure can be applied equally to all subslot structures. Accordingly, the UE may acquire the transmission power reference value of the sub slot and provide the used power information for each sub slot.

11 is a block diagram illustrating a structure of a UE according to an embodiment disclosed herein.

11, the terminal 1100 may include a transceiver 1110, a memory 1120, and a processor 1130. [ The transmission / reception unit 1110, the memory 1120, and the processor 1130 of the terminal 1100 can operate according to the communication method of the terminal 1100 described above. However, the constituent elements of the terminal 1100 are not limited to the above-described examples. For example, the terminal 1100 may include more or fewer components than the above-described components. In addition, the transmission / reception unit 1110, the memory 1120, and the processor 1130 may be implemented as a single chip. The processor 1130 may also be at least one.

The transmission / reception unit 1110 can transmit and receive signals to / from the base station. Here, the signal may include control information and data. To this end, the transceiver unit 1110 may include an RF transmitter for up-converting and amplifying the frequency of a transmitted signal, an RF receiver for low-noise amplifying the received signal, and down-converting the frequency of the received signal. However, this is only an embodiment of the transmitting and receiving unit 1110, and the components of the transmitting and receiving unit 1110 are not limited to the RF transmitter and the RF receiver.

The transceiver unit 1110 may receive a signal through a wireless channel, output the signal to the processor 1130, and transmit the signal output from the processor 1130 through a wireless channel.

The memory 1120 may store programs and data necessary for the operation of the terminal 1100. [ In addition, the memory 1120 may store control information or data included in the signal obtained by the terminal 1100. [ The memory 1120 may be comprised of a storage medium such as ROM, RAM, hard disk, CD-ROM and DVD, or a combination of storage media.

The processor 1130 can control a series of processes so that the terminal 1100 can operate according to the above-described embodiment. According to some embodiments, the processor 1130 obtains a transmit power reference value of a slot based on transmit power information of symbols of at least one OFDM used for uplink transmission in a slot, and calculates a transmit power reference value Power consumption information can be determined based on the power consumption information. The processor 1130 can also control the transmitting / receiving unit 1110 of the terminal 1100 to transmit the used power information to the base station.

Further, the transmission / reception unit 1110 receives information on the power control mode, and the processor 1130 selectively selects one of the system information or the downlink control information based on the power control mode to approve the data transmission of the first slot And determines the transmission power of the terminal in the first slot to the transmission power information included in the scheduling grant information received at the determined time.

12 is a block diagram showing the structure of a base station according to an embodiment disclosed.

12, a base station 1200 may include a transceiver 1210, a memory 1220, and a processor 1230. Receiver 1210, memory 1220, and processor 1230 of the base station 1200 may operate according to the communication method of the base station 1200 described above. However, the constituent elements of the base station 1200 are not limited to the above-described examples. For example, base station 1200 may include more or fewer components than those described above. In addition, the transmission / reception unit 1210, the memory 1220, and the processor 1230 may be implemented in the form of a single chip.

The transmitting and receiving unit 1210 can transmit and receive signals to and from the terminal. Wherein the signal may include control information and data. To this end, the transceiver 1210 may include an RF transmitter for up-converting and amplifying the frequency of a transmitted signal, an RF receiver for low-noise amplifying the received signal, and down-converting the frequency of the received signal. However, this is only an embodiment of the transmitting and receiving unit 1210, and the components of the transmitting and receiving unit 1210 are not limited to the RF transmitter and the RF receiver.

In addition, the transceiver may receive a signal through a wireless channel, output the signal to the processor 1230, and transmit the signal output from the processor 1230 through a wireless channel.

The memory 1220 can store programs and data necessary for the operation of the base station 1200. [ In addition, the memory 1220 may store control information or data included in the signal obtained at the base station 1200. The memory 1220 may comprise a storage medium such as ROM, RAM, hard disk, CD-ROM and DVD, or a combination of storage media.

The processor 1330 can control a series of processes so that the base station 1300 can operate according to the above-described embodiment.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of the present invention in order to facilitate the understanding of the present invention and are not intended to limit the scope of the present invention. That is, it will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible. In addition, each of the above embodiments can be combined and operated as needed. For example, some of the embodiments may be combined with each other so that the base station and the terminal can be operated. Furthermore, although the above-described embodiments are presented based on the NR system, other variants based on the technical idea of the embodiments may be applicable to other systems such as the FDD or the TDD LTE system.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. And is not intended to limit the scope of the invention. It is to be understood by those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

Claims (20)

A method for providing power information of a terminal in a wireless communication system,
Obtaining a transmission power reference value of the slot based on transmission power information of symbols of at least one OFDM used for uplink transmission in the slot;
Determining power usage information based on a transmission power reference value of the acquired slot; And
And transmitting the used power information. The method according to claim 1,
The step of obtaining a transmit power reference value of the slot comprises:
Wherein at least one of a transmission power value of a first OFDM symbol and a transmission power value of a last OFDM symbol of at least one OFDM symbol in the slot is obtained as a transmission power reference value of the slot. The method according to claim 1,
The step of obtaining a transmit power reference value of the slot comprises:
And obtains an average transmit power value of at least one OFDM symbol in the slot as the transmit power reference value. The method according to claim 1,
The step of obtaining a transmit power reference value of the slot comprises:
Wherein at least one of a maximum transmission power value and a minimum transmission power value of power values used for transmission of each of the at least one OFDM symbols in the slot is obtained as a transmission power reference value of the slot. The method according to claim 1,
Wherein the determining the power usage information based on the transmission power reference value of the acquired slot comprises:
And determines a difference value between a maximum power value that the UE can use for uplink transmission and a transmission power reference value of the slot as the used power information. The method according to claim 1,
The step of obtaining a transmit power reference value of the slot comprises:
Receiving control information including information on a method of acquiring a transmission power reference value of the slot from a base station;
Determining a method of obtaining a transmit power reference value of the slot based on the received control information; And
And obtaining a transmission power reference value of the slot from transmission power information of symbols of at least one OFDM according to the determined method. The method according to claim 1,
Wherein the slot comprises a sub-slot. A method of controlling power of a terminal in a wireless communication system,
Receiving information about a power control mode;
Selecting one of system information and downlink control information based on the power control mode to determine when scheduling grant information for granting data transmission of the first slot is received;
And determining a transmission power of the UE in the first slot based on the transmission power information included in the scheduling grant information received at the determined time. 9. The method of claim 8,
Wherein the step of determining when the scheduling grant information is received comprises:
And selecting the downlink control information when the power control mode is an absolute value mode and selecting the system information when the power control mode is an accumulation mode to determine when the scheduling grant information is received . 9. The method of claim 8,
The step of determining the transmission power of the terminal comprises:
Wherein when a plurality of scheduling grant information for data to be transmitted in the first slot is received, one scheduling grant information is selected based on a time point at which the plurality of scheduling grant information is received, and transmission power information And determines a transmission power of the terminal in the first slot based on the transmission power of the terminal. A terminal for providing power information in a wireless communication system,
Acquires a transmission power reference value of the slot based on transmission power information of symbols of at least one OFDM used for uplink transmission in a slot and determines power usage information based on a transmission power reference value of the acquired slot At least one processor; And
And a transmitting / receiving unit for transmitting the used power information. 12. The method of claim 11,
The processor comprising:
And acquires at least one of a transmission power value of a first OFDM symbol and a transmission power value of a last OFDM symbol of at least one OFDM symbol in the slot as a transmission power reference value of the slot. 12. The method of claim 11,
The processor comprising:
And obtains an average transmit power value of at least one OFDM symbol in the slot as the transmit power reference value. 12. The method of claim 11,
The processor comprising:
Acquires at least one of a maximum transmission power value and a minimum transmission power value among power values used for transmission of each of at least one OFDM symbols in the slot as a transmission power reference value of the slot. 12. The method of claim 11,
The processor comprising:
And determines a difference value between a maximum power value that the UE can use for uplink transmission and a transmission power reference value of the slot as the used power information. 12. The method of claim 11,
The processor comprising:
Receiving control information including information on a method of obtaining a transmission power reference value of the slot from a base station and determining a method of obtaining a transmission power reference value of the slot based on the received control information, And obtains a transmission power reference value of the slot from the transmission power information of at least one OFDM symbol according to the transmission power information. 12. The method of claim 11,
Wherein the slot comprises a subslot. A terminal for controlling power according to transmission power information,
A transmission / reception unit for receiving information on a power control mode; And
Determining whether a scheduling grant information for granting data transmission of a first slot is received by selecting one of system information or downlink control information based on the power control mode, And at least one processor for determining a transmission power of the terminal in the first slot based on the transmission power information included in the information. 19. The method of claim 18,
The processor comprising:
Selects the downlink control information when the power control mode is an absolute value mode, and determines the time when the scheduling grant information is received by selecting the system information when the power control mode is an accumulation mode. 19. The method of claim 18,
The processor comprising:
Wherein when a plurality of scheduling grant information for data to be transmitted in the first slot is received, one scheduling grant information is selected based on a time point at which the plurality of scheduling grant information is received, and transmission power information And determines the transmission power of the terminal in the first slot based on the transmission power of the terminal.

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