KR20200035790A - Method and apparatus for transmisison of harq-ack in wireless communication system - Google Patents

Abstract

According to embodiments of the present invention, disclosed is a method for allowing a terminal to transmit a hybrid automatic repeat request-acknowledgement (HARQ-ACK) to a base station. The method comprises the steps of: receiving a plurality of physical downlink shared channels (PDSCHs) from the base station; determining HARQ-ACK codebook information for the plurality of PDSCHs based on HARQ-ACK timing information; and transmitting a plurality of HARQ-ACKs for the plurality of PDSCHs to the base station through one slot based on the determined HARQ-ACK codebook information.

Description

Method and apparatus for transmitting HARQ-ACK in a wireless communication system {METHOD AND APPARATUS FOR TRANSMISISON OF HARQ-ACK IN WIRELESS COMMUNICATION SYSTEM}

The present disclosure relates to a method and apparatus for transmitting HARQ-ACK in a wireless communication system.

Efforts have been made to develop an improved 5G communication system or a pre-5G communication system to meet the increasing demand for wireless data traffic after commercialization of the 4G communication system. For this reason, the 5G communication system or the pre-5G communication system is called a 4G network (Beyond 4G Network) communication system or an LTE system (Post LTE) or later system. The 5G communication system established by 3GPP is called a New Radio (NR) system. To achieve high data rates, 5G communication systems are being considered for implementation in the ultra-high frequency (mmWave) band (eg, 60 gigahertz (60 GHz) band). In order to mitigate the path loss of radio waves in the ultra-high frequency band and increase the transmission distance of radio waves, in 5G communication systems, beamforming, massive array multiple input / output (massive MIMO), full dimensional multiple input / output (FD-MIMO) ), Array antenna, analog beam-forming, and large scale antenna techniques have been discussed and applied to NR systems. In addition, in order to improve the network of the system, in the 5G communication system, the evolved small cell, advanced small cell, cloud radio access network (cloud RAN), ultra-dense network , Device to Device communication (D2D), wireless backhaul, mobile network, cooperative communication, CoMP (Coordinated Multi-Points), and interference cancellation Technology development is being conducted. In addition, in 5G systems, advanced coding modulation (Advanced Coding Modulation (ACM)), hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC), and advanced access technologies, FBMC (Filter Bank Multi Carrier), and NOMA (non-orthogonal multiple access), and SCMA (sparse code multiple access) are being developed.

Meanwhile, the Internet is evolving from a human-centered connection network in which humans generate and consume information, to an Internet of Things (IoT) network that exchanges information between distributed components such as objects. Internet of Everything (IoE) technology, in which big data processing technology, etc. through connection to a cloud server, is combined with IoT technology is also emerging. In order to implement IoT, technical elements such as sensing technology, wired / wireless communication and network infrastructure, service interface technology, and security technology are required, and recently, a sensor network for connection between objects, a machine to machine (Machine to Machine) , M2M), and MTC (Machine Type Communication). In an IoT environment, an intelligent IT (Internet Technology) service that collects and analyzes data generated from connected objects to create new values in human life may be provided. IoT is a field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliance, high-tech medical service through convergence and combination between existing information technology (IT) technology and various industries. It can be applied to.

Accordingly, various attempts have been made to apply a 5G communication system to an IoT network. For example, technologies such as sensor network, machine to machine (M2M), and machine type communication (MTC) are being implemented by techniques such as beamforming, MIMO and array antenna, which are 5G communication technologies. . It may be said that the application of cloud radio access network (cloud RAN) as the big data processing technology described above is an example of 5G technology and IoT technology convergence. As it is possible to provide various services according to the above-mentioned and the development of the wireless communication system, a method for effectively providing these services is required.

The present disclosure relates to a method and apparatus for transmitting HARQ-ACK in a wireless communication system.

According to embodiments of the present disclosure, a method for a user equipment to transmit HARQ-ACK to a base station in a wireless communication system, the method comprising: receiving a plurality of PDSCHs from the base station; Determining HARQ-ACK codebook information for the plurality of PDSCHs based on HARQ-ACK timing information; And transmitting a plurality of HARQ-ACKs for the plurality of PDSCHs to the base station through one slot based on the determined HARQ-ACK codebook information.

1 is a view showing a transmission structure of a time-frequency domain, which is a radio resource domain of a 5G system or an NR system.
2 is a diagram for explaining a method for allocating data for eMBB, URLLC, and mMTC in a time-frequency resource region in a 5G system or an NR system.
3 is a view showing a semi-static HARQ-ACK codebook setting method in the NR system.
4 is a diagram showing a method of setting a dynamic HARQ-ACK codebook in an NR system.
5 is a view for explaining a HARQ-ACK codebook setting method according to the first-first embodiment.
6 is a view for explaining a HARQ-ACK codebook setting method according to the embodiment 1-2.
7 is a view for explaining a HARQ-ACK codebook setting method according to the embodiment 1-3.
8 is a view for explaining a HARQ-ACK codebook setting method according to the embodiment 1-4.
9 is a view for explaining a HARQ-ACK codebook setting method according to the 2-1 embodiment.
10 is a flowchart illustrating a method of operating a terminal according to an embodiment of the present disclosure.
11 is a diagram schematically showing a structure of a terminal according to an embodiment of the present disclosure.
12 is a diagram schematically showing a structure of a base station according to an embodiment of the present disclosure.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

In describing the embodiments, descriptions of technical contents well known in the technical field to which the present disclosure pertains and which are not directly related to the present disclosure will be omitted. This is to more clearly and without obscuring the subject matter of the present disclosure by omitting unnecessary description.

For the same reason, in the accompanying drawings, some components are exaggerated, omitted, or schematically illustrated. Also, the size of each component does not entirely reflect the actual size. The same reference numbers are assigned to the same or corresponding elements in each drawing.

Advantages and features of the present disclosure, and a method of achieving them will be apparent with reference to embodiments described below in detail together with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the embodiments allow the present disclosure to be complete, and those skilled in the art to which the present disclosure pertains. It is provided to fully inform the scope of the invention to the present invention, and the present disclosure is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

At this time, it will be understood that each block of the process flow chart diagrams and combinations of flow chart diagrams can be performed by computer program instructions. Since these computer program instructions may be mounted on a processor of a general purpose computer, special purpose computer or other programmable data processing equipment, those instructions performed through a processor of a computer or other programmable data processing equipment are described in flowchart block (s). It creates a means to perform functions. These computer program instructions can also be stored in computer readable or computer readable memory that can be oriented to a computer or other programmable data processing equipment to implement a function in a particular way, so that computer readable or computer readable memory It is also possible for the instructions stored in to produce an article of manufacture containing instructions means for performing the functions described in the flowchart block (s). Since computer program instructions may be mounted on a computer or other programmable data processing equipment, a series of operational steps are performed on the computer or other programmable data processing equipment to create a process that is executed by the computer to generate a computer or other programmable data. It is also possible for instructions to perform processing equipment to provide steps for executing the functions described in the flowchart block (s).

Also, 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, it is also possible that the functions mentioned in the blocks occur out of sequence. For example, two blocks shown in succession may in fact be executed substantially simultaneously, or it is also possible that the blocks are sometimes executed in reverse order according to a corresponding function.

At this time, the term '~ unit' used in this embodiment means software or hardware components such as a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC), and '~ unit' performs certain roles. do. However, '~ wealth' is not limited to software or hardware. The '~ unit' may be configured to be in an addressable storage medium or may be configured to reproduce one or more processors. Thus, as an example, '~ unit' refers to components such as software components, object-oriented software components, class components and task components, processes, functions, attributes, and procedures. , Subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, database, data structures, tables, arrays, and variables. The functions provided within components and '~ units' may be combined into a smaller number of components and '~ units', or further separated into additional components and '~ units'. In addition, the components and '~ unit' may be implemented to play one or more CPUs in the device or secure multimedia card. Also, in the embodiment, '~ unit' may include one or more processors.

The wireless communication system deviates from providing the initial voice-oriented service, for example, 3GPP's High Speed Packet Access (HSPA), Long Term Evolution (LTE) or Evolved Universal Terrestrial Radio Access (E-UTRA), LTE-Advanced ( LTE-A), 3GPP2 high rate packet data (HRPD), UMB (Ultra Mobile Broadband), and IEEE 802.16e, such as communication standards such as high-speed, high-quality packet data service to provide a broadband wireless communication system and In addition, 5G or NR (New Radio) communication standards are being developed as the fifth generation wireless communication systems.

As a typical example of a broadband wireless communication system, a 5G system or an NR system adopts an orthogonal frequency division multiplexing (OFDM) scheme in a downlink (DL) and an uplink. More specifically, a CP-OFDM (Cyclic-Prefix OFDM) scheme is adopted in the downlink, and a DFT-S-OFDM (Discrete Fourier Transform Spreading OFDM) scheme is adopted in the uplink. Uplink refers to a radio link through which a user equipment (UE) or a mobile station (MS) transmits data or control signals to a base station (gNode B, eNode B, or base station (BS)). Refers to a radio link through which a base station transmits data or control signals to a terminal. In such a multiple access method, data or control information of each user can be distinguished by assigning and operating so that time-frequency resources to be loaded with data or control information for each user do not overlap with each other, that is, orthogonality is established. You can.

The 5G system or the NR system employs a hybrid automatic repeat reQuest (HARQ) method that retransmits the corresponding data in the physical layer when a decoding failure occurs in the initial transmission. The HARQ method means a method in which the receiver transmits information (Negative Acknowledgment) (NACK) that informs the transmitter of the decoding failure when the receiver fails to correctly decode (decode) the data so that the transmitter can retransmit the corresponding data in the physical layer. do. The receiver may improve data reception performance by combining data retransmitted by the transmitter with data that has previously failed decoding. In addition, when the receiver correctly decodes the data, the transmitter may transmit new data by transmitting an acknowledgment (ACK) informing the transmitter of decoding success.

Meanwhile, the new 5G communication NR (New Radio access technology) system is designed to freely multiplex various services in time and frequency resources. Accordingly, signal waveforms, numerology, reference signals, and the like can be dynamically or freely allocated according to the needs of the corresponding service. In order to provide an optimal service to a terminal in wireless communication, it is important to optimize data transmission through measurement of channel quality and amount of interference, and accordingly, accurate channel state measurement is required.

However, unlike 4G communication, where the channel and interference characteristics do not change significantly depending on the frequency resource, the 5G or NR channel has a significant change in channel and interference characteristics depending on the service. It is necessary to support (Frequency Resource Group, FRG) -level subsets. Meanwhile, in the 5G system or the NR system, the types of supported services may be divided into categories such as Enhanced Mobile BroadBand (eMBB), Massive Machine Type Communications (mMTC), and Ultra-Reliable and Low-Latency Communications (URLLC). eMBB is a high-speed data transfer, mMTC is a service aiming at minimizing terminal power and connecting multiple terminals, and URLLC is aiming for high reliability and low latency. Different requirements may be applied according to the type of service applied to the terminal.

Since the URLLC service among the above-described services aims for high reliability and low latency, there may be a need to transmit control information and data information that can be transmitted through a physical channel at a low coding rate. In the case of control information, the repetitive transmission function of control information has already been introduced in LTE's MTC or NB-IoT (Narrow Band Internet-of-Things) service. The purpose of this introduction was to provide high coverage for terminals with small bandwidth, so the delay time was not sufficiently considered. In addition, the minimum unit of repetitive transmission of control information is fixed in subframe units based on LTE. In order to support a URLLC service in an NR system or a 5G system, it is necessary to introduce a control information repetitive transmission mode capable of improving reliability while requiring low latency. Accordingly, the present disclosure basically considers a situation in which control information is repeatedly transmitted in a slot. Additionally, a situation in which control information that can be transmitted over a slot boundary is repeatedly transmitted is also considered. Through the operation provided in the present disclosure, it is possible for the terminal to detect the control information transmitted from the base station with higher reliability at a faster time.

In the present disclosure, each term is defined in consideration of each function, which may vary according to a user's or operator's intention or practice. Therefore, the definition should be made based on the contents throughout this specification. Hereinafter, the base station is a subject that performs resource allocation of a terminal, and may be at least one of a gNode B (gNB), an eNode B (eNB), a Node B, a base station (BS), a radio access unit, a base station controller, or a node on a network. You can. 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 disclosure, a downlink (DL) is a radio transmission path of a signal transmitted by a base station to a terminal, and an uplink (UL) means a radio transmission path of a signal transmitted by a terminal to a base station. In addition, NR system is described as an example in the present disclosure below, but is not limited thereto, and embodiments of the present disclosure may be applied to various communication systems having similar technical backgrounds or channel types. In addition, the embodiments of the present disclosure can be applied to other communication systems through some modifications within a range that does not significantly depart from the scope of the present disclosure by the judgment of a person having skilled technical knowledge.

In the present disclosure, the terms conventional physical channel and signal can be used interchangeably with data or control signals. For example, a Physical Downlink Shared Channel (PDSCH) is a physical channel through which data is transmitted, but the PDSCH may also be referred to as data in the present disclosure.

In the present disclosure, upper signaling is a signal transmission method transmitted from a base station to a terminal using a downlink data channel of a physical layer, or a signal transmission method transmitted from a terminal to a base station using an uplink data channel of a physical layer, RRC signaling or MAC control element It may also be referred to as (CE, hereinafter control element).

Meanwhile, as research on a next-generation communication system has recently been conducted, various methods for scheduling communication with a terminal are being discussed. Accordingly, an efficient scheduling and data transmission / reception method considering characteristics of a next-generation communication system is required. Accordingly, in order to provide a plurality of services to a user in a communication system, there is a need for a method and an apparatus using the same that can provide each service within the same time period according to the characteristics of the service.

The NR system employs a hybrid automatic repeat reQuest (HARQ) method that retransmits the corresponding data in the physical layer when a decoding failure occurs in the initial transmission. In the HARQ scheme, when the receiver fails to correctly decode (decode) data, the receiver transmits information (Negative Acknowledgment) (NACK) that informs the transmitter of the decoding failure, so that the transmitter can retransmit the corresponding data in the physical layer. The receiver increases data reception performance by combining data retransmitted by the transmitter with data that has previously failed decoding. In addition, when the receiver correctly decodes data, it is possible to transmit new data to the transmitter by transmitting acknowledgment (ACK) informing the transmitter of decoding success.

Hereinafter, a method and apparatus for transmitting HARQ-ACK feedback for downlink data transmission will be described in the present disclosure. Specifically, a method of configuring HARQ-ACK feedback bits when a terminal intends to transmit multiple HARQ-ACKs in one slot in uplink is described.

In a wireless communication system, particularly a New Radio (NR) system, a base station may set one component carrier (CC) or multiple CCs for downlink transmission to a terminal. In addition, in each CC, downlink transmission and uplink transmission slots and symbols may be set.

On the other hand, when the downlink data PDSCH (Physical Downlink Shared Channel) is scheduled, the slot timing information to which the PDSCH is mapped in a specific bit field of downlink control information (DCI), and the PDSCH is mapped in the corresponding slot At least one of the location of the starting symbol and the number of symbols to which the PDSCH is mapped may be transmitted. For example, when DCI is delivered in slot n and the PDSCH is scheduled, if the slot timing information K0, which is the PDSCH transmission, points to 0, and the start symbol position is 0 and the symbol length is 7, the corresponding PDSCH is the slot n. It is mapped and transmitted from symbol 0 to 7 symbols.

Meanwhile, the downlink data signal PDSCH is transmitted and HARQ-ACK feedback is transmitted from the terminal to the base station after the K1 slot. K1 information, which is timing information on which HARQ-ACK is transmitted, may be transmitted through DCI. Through upper signaling, a candidate set of possible K1 values may be delivered, and one of them may be determined through DCI.

When the UE receives the semi-static HARQ-ACK codebook, the UE includes a table including at least one of K0, start symbol information, symbol number and length information, which is slot information to which the PDSCH is mapped, and HARQ-ACK feedback for the PDSCH A feedback bit (or HARQ-ACK codebook size) to be transmitted may be determined by timing information K1 candidate values. A table including slot information to which PDSCH is mapped, start symbol information, number of symbols or length information may have a default value. Or, there may be a table that the base station can set for the terminal.

When the UE receives the dynamic HARQ-ACK codebook, the UE is included in DCI in a slot in which HARQ-ACK information is transmitted according to K0, which is slot information to which PDSCH is mapped, and K1 value of HARQ-ACK feedback timing information for PDSCH. The HARQ-ACK feedback bit (or HARQ-ACK codebook size) to be transmitted by the UE may be determined by the downlink assignment indicator (DAI) information.

According to embodiments of the present disclosure, a method and apparatus for configuring an HARQ-ACK codebook in a situation in which a terminal performs one or more HARQ-ACK transmissions in one slot is disclosed.

1 is a view showing a transmission structure of a time-frequency domain, which is a radio resource domain of a 5G system or an NR system.

Referring to FIG. 1, in the radio resource domain, 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 OFDM symbol, and N _symb OFDM symbols 102 are collected to form one slot 106. The length of the subframe may be defined as 1.0 ms, and the radio frame (Radio frame 114) may be defined as 10 ms. The minimum transmission unit in the frequency domain is a subcarrier, and the bandwidth of the entire system transmission bandwidth may consist of a total of N _BW subcarriers 104. However, these specific values can be variably applied depending on the system.

The basic unit of the time-frequency resource region is a resource element (hereinafter, RE), which may be represented by an OFDM symbol index and a subcarrier index. Resource block (108, Resource Block, hereinafter RB) or Physical Resource Block (hereinafter, PRB) is defined as N _symb consecutive OFDM symbols 102 in the time domain and N _RB consecutive subcarriers 110 in the frequency domain. Can be. Accordingly, one RB 108 may be composed of N _symb x N _RB REs 112.

Generally, the minimum transmission unit of data is an RB unit. In a 5G system or an NR system, N _symb = 14, N _RB = 12, and 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 for the terminal. In a 5G system or an NR system, in the case of an FDD system that operates by dividing downlink and uplink into frequencies, the downlink transmission bandwidth and the uplink transmission bandwidth may be different. The channel bandwidth represents the RF bandwidth corresponding to the system transmission bandwidth. [Table A] below shows the correspondence between the system transmission bandwidth and channel bandwidth defined in the LTE system, which is a 4G wireless communication before the 5G system or the NR system. For example, in an LTE system having a 10 MHz channel bandwidth, the transmission bandwidth is composed of 50 RBs.

Table A

In a 5G system or an NR system, it can operate in a wider channel bandwidth than the channel bandwidth of LTE presented in [Table A]. [Table B] shows the correspondence between system transmission bandwidth and channel bandwidth and subcarrier spacing (SCS or subcarrier spacing) in a 5G system or an NR system.

Table B

Scheduling information for downlink data or uplink data in a 5G system or an NR system is transmitted from a base station to a terminal through downlink control information (DCI). DCI is defined according to various formats, and whether the scheduling information (UL grant) for uplink data or the scheduling information (DL grant) for downlink data is determined according to each format, or whether the compact DCI has a small control information size. , Whether spatial multiplexing using multiple antennas is applied, whether DCI is used for power control, and the like. For example, DCI format 1-1, which is scheduling control information (DL grant) for downlink data, may include at least one of the following control information.

-Carrier indicator: indicates which frequency carrier is transmitted.

-DCI format indicator: It is an indicator to distinguish whether the corresponding DCI is for downlink or uplink.

-BandWidth Part (BWP) indicator: indicates which BWP is transmitted.

-Frequency domain resource allocation: indicates the RB of the frequency domain allocated for data transmission. The resources to be expressed are determined according to the system bandwidth and resource allocation method.

-Time domain resource allocation: Indicate which OFDM symbol of which slot and data related channel is to be transmitted.

-VRB-to-PRB mapping: Instructs how to map the virtual RB (Virtual RB, VRB) index and the physical RB (PRB) index.

-Modulation and coding scheme (hereinafter referred to as MCS): indicates a modulation scheme and coding rate used for data transmission. That is, QPSK (Quadrature Phase Shift Keying), 16QAM (Quadrature Amplitude Modulation), 64QAM, or 256QAM together with information on whether TBS (Transport Block Size) and channel coding information can be indicated. have.

-CBG group transmission information (CodeBlock Group transmission information): When CBG retransmission is set, indicates information about which CBG is transmitted.

-HARQ process number (HARQ process number): indicates the process number of the HARQ.

-New data indicator (New data indicator): indicates whether the HARQ initial transmission or retransmission.

-Redundancy version: indicates a redundancy version of HARQ.

-Transmit Power Control (TPC) command for PUCCH for Physical Uplink Control CHannel (PUCCH): Instructs a transmit power control command for PUCCH, an uplink control channel.

In the case of the aforementioned PUSCH transmission, time domain resource assignment is based on information on a slot in which the PUSCH is transmitted, a starting OFDM symbol position S in the corresponding slot, and the number of OFDM symbols L to which the PUSCH is mapped. Can be delivered. The aforementioned S may be a relative position from the start of the slot, L may be the number of consecutive OFDM symbols, and S and L may be determined from a Start and Length Indicator Value (SLIV) defined as follows. have.

In a 5G system or an NR system, a table including information on SLIV values, PUSCH mapping types, and slots through which PUSCHs are transmitted can be set in one row through RRC configuration. Subsequently, in the time domain resource allocation of DCI, the base station may indicate the SLIV value, the PUSCH mapping type, and the slot on which the PUSCH is transmitted by indicating the index value in the set table.

In the 5G system or the NR system, PUSCH mapping types are defined as type A (type A) and type B (type B). In the PUSCH mapping type A, the first OFDM symbol of the DMRS OFDM symbol is located in the second or third OFDM symbol in the slot. In the PUSCH mapping type B, the first OFDM symbol among DMRS OFDM symbols is located in the first OFDM symbol in the time domain resource allocated by PUSCH transmission. The aforementioned PUSCH time domain resource allocation method may be equally applicable to PDSCH time domain resource allocation.

The DCI may be transmitted on a downlink physical control channel (PDCCH) (or control information, hereinafter, used in combination) through a channel coding and modulation process.

In general, DCI is scrambled independently for each UE with a specific Radio Network Temporary Identifier (RNTI) (or UE ID), CRC (Cyclic Redundancy Check) is added, and after channel coding, each PDCCH is configured and transmitted. do. The PDCCH is transmitted by being mapped in a control resource set (CORESET) set for the terminal.

The downlink data may be transmitted on a physical downlink shared channel (PDSCH), which is a physical channel for downlink data transmission. The PDSCH may be transmitted after the control channel transmission period, and scheduling information such as a specific mapping position and modulation method in the frequency domain is determined based on DCI transmitted through the PDCCH.

Among the control information constituting the DCI, the base station notifies the UE of the modulation method applied to the PDSCH to be transmitted and the size of the data to be transmitted (Transport Block Size, TBS). In one embodiment, the MCS may consist of 5 bits or more or fewer bits. The TBS corresponds to the size before the channel coding for error correction is applied to data to be transmitted by the base station (Transport Block, hereinafter TB).

In the present disclosure, a transport block (TB) is referred to as a medium access control (MAC) header, a MAC control element (CE), one or more MAC service data units (SDUs), and padding. ) Bits. Alternatively, TB may indicate a unit of data or MAC protocol data unit (PDU) that is transmitted from the MAC layer to the physical layer.

The modulation schemes supported by the 5G system or the NR system are QPSK (Quadrature Phase Shift Keying), 16QAM (Quadrature Amplitude Modulation), 64QAM, and 256QAM, and each modulation order (Qm) is 2, 4, 6, Equivalent to 8. That is, 2 bits per symbol for QPSK modulation, 4 bits per OFDM symbol for 16QAM modulation, 6 bits per symbol for 64QAM modulation, and 8 bits per symbol for 256QAM modulation.

In a 5G system or an NR system, when a UE is scheduled for PDSCH or PUSCH by DCI, when indicating a time resource allocation field index m included in DCI, this corresponds to m + 1 in a table indicating time domain resource allocation information This indicates the combination of DRMS Type A position information, PDSCH mapping type information, slot index K ₀ , data resource start symbol S, and data resource allocation length L. As an example, Table 1 is a table including time domain resource allocation information.

[Table 1] PDSCH time domain resource allocation based on normal cyclic prefix

In Table 1, dmrs-typeA-Position is a field indicative of a symbol position in which DMRS is transmitted in one slot indicated by SIB (System Information Block), which is one of terminal common control information. The possible values for this field are 2 or 3. When the number of symbols constituting one slot is 14 and the first symbol index is 0, 2 means the third symbol and 3 means the fourth symbol.

In Table 1, the PDSCH mapping type is information indicating the location of the DMRS in the scheduled data resource area. When the PDSCH mapping type is A, regardless of the allocated data time domain resource, DMRS is always transmitted / received at a symbol position determined by dmrs-typeA-Position.

When the PDSCH mapping type is B, DMRS is transmitted / received in the first symbol of the data time domain resource where the location is always allocated. In other words, PDSCH mapping type B does not use dmrs-typeA-Position information.

In Table 1, K ₀ denotes the offset of the slot index to which the PDCCH to which the DCI is transmitted belongs and the slot index to which the PDSCH or PUSCH scheduled in the DCI belongs. For example, when the slot index of the PDCCH is n, the slot index of the PDSCH or PUSCH scheduled by the DCI of the PDCCH is n + K ₀ .

In Table 1, S represents a start symbol index of a data time domain resource within one slot. The range of possible S values is usually 0 to 13 based on Normal Cyclic Prefix.

In Table 1, L denotes a data time domain resource interval length in one slot. Possible values of L range from 1 to 14. However, the possible values of S and L are determined by the following [Equation 1] and [Table 2] or [Table 3]. Table 1 may be values used by the terminal as a default before receiving time resource allocation information through terminal specific or terminal common upper signaling. As an example, DCI format 0_0 or 1_0 can always use [Table 1] as the default time resource region value.

 Table 1 shows PDSCH time domain resource allocation values, and K1 values are used instead of K2 for PUSCH time domain resource allocation. Table 1-1 below is an example of a PUSCH time domain resource allocation table.

[Table 1-1] PDSCH time domain resource allocation based on normal cyclic prefix

[Equation 1]

The following [Table 2] is a table showing possible combinations of S and L depending on whether the cyclic anterior is normal or extended and whether the PDSCH mapping type is type A or type B.

[Table 2] PDSCH time domain resource allocation possible combination of S and L

The following [Table 3] is a table showing possible combinations of S and L depending on whether the cyclic prefix is normal or extended and whether the PUSCH mapping type is type A or type B.

[Table 3] Combination of S and L assignable to PUSCH time domain resources

In Table 1, each index may be set through the upper signaling parameter PDSCH-TimeDomain ResourceAllocationList or PUSCH-TimeDomainResourceAllocationList.

PDSCH-TimeDomainResourceAllocationList is composed of one or more upper signaling parameters PDSCH-TimeDomainResourceAllocation, and PDSCH-TimeDomainResourceAllocation has k0, mappingtype, and startSymbolAndLength. The possible range of values for k0 is 0 to 32. Mapping type may be type A or type B. The possible value range for StartSymbolAndLength is 0 to 127. As described above, when the mapping type is type A, the symbol position of the DMRS follows the value indicated by dmrs-typeA-Position.

PUSCH-TimeDomainResourceAllocationList is composed of one or more upper signaling parameters PUSCH-TimeDomainResourceAllocation, and PUSCH-TimeDomainResourceAllocation has k0, mapping type, and startSymbolAndLength. The possible range of values for k0 is 0 to 32. Mapping type may be type A or type B. The possible value range for StartSymbolAndLength is 0 to 127. As described above, when the mapping type is type A, the symbol position of the DMRS follows the value indicated by dmrs-typeA-Position.

The above-described PDSCH-TimeDomainResourceAllocation or PUSCH-TimeDomainResource Allocation is a time domain resource allocation method of PDSCH or PUSCH in one slot. The upper signaling aggregationFactorDL means the number of slots in which the PDSCH-TimeDomainResourceAllocation value applied in one slot is repeatedly transmitted. The upper signaling aggregationFactorUL means the number of slots in which the PUSCH-TimeDomainResourceAllocation value applied in one slot is repeatedly transmitted. The range of possible values of aggregationFactorDL and aggregationFactorUL is {1,2,4,8}. For example, when aggregationFactorDL is 8, it means that one of the possible PDSCH-TimeDomainResourceAllocations is repeatedly transmitted over a total of 8 slots. However, if at least some of the symbols applied to PDSCH-TimeDomainResourceAllocation in a specific slot are uplink symbols, PDSCH transmission and reception of the corresponding slot is omitted. Similarly, if at least some of the symbols applied to PUSCH-TimeDomainResourceAllocation in a specific slot are downlink symbols, PUSCH transmission and reception of the corresponding slot is omitted.

2 is a diagram for explaining a method for allocating data for eMBB, URLLC, and mMTC in a time-frequency resource region in a 5G system or an NR system.

Referring to FIG. 2, data for eMBB, URLLC, and mMTC may be allocated in the entire system frequency band 200. When eMBB 201 and mMTC 209 are allocated and transmitted in a specific frequency band and URLLC data 203, 205, and 207 are generated during transmission, eMBB 201 and mMTC 209 are already allocated. It is possible to empty or to transmit URLLC data 203, 205, 207 without transmission.

Among the above-described services, since URLLC needs to reduce latency, URLLC data may be allocated and transmitted to a portion of the resource to which eMBB or mMTC is allocated.

When URLLC is additionally allocated and transmitted from the resource to which the eMBB is allocated, eMBB data may not be transmitted from the overlapped time-frequency resource, and thus, transmission performance of the eMBB data may be lowered. That is, eMBB data transmission failure due to URLLC allocation may occur.

3 is a view showing a semi-static HARQ-ACK codebook setting method in the NR system.

In a situation in which the HARQ-ACK PUCCH that a UE can transmit in one slot is limited to one, when the UE receives a semi-static HARQ-ACK codebook upper setting, the UE receives PDSCH-to-HARQ_feedback in DCI format 1_0 or DCI format 1_1. In the slot indicated by the value of the timing indicator, in the HARQ-ACK codebook, reports HARQ-ACK information for PDSCH reception or SPS PDSCH release.

The UE reports the HARQ-ACK information bit value through NACK in the HARQ-ACK codebook in a slot not indicated by the PDSCH-to-HARQ_feedback timing indicator field in DCI format 1_0 or DCI format 1_1.

If, in the M _{A, C} cases for receiving a candidate PDSCH, the UE reports only HARQ-ACK information for one SPS PDSCH release or one PDSCH reception, and the counter DACI field indicates 1 in the Pcell. When scheduled according to DCI format 1_0 including the information, the UE determines one SPQ PDSCH release or one HARQ-ACK codebook for receiving the PDSCH.

Otherwise, the HARQ-ACK codebook determination method according to the method described below is followed.

Assuming that the set of PDSCH reception candidate cases in the serving cell c is M _{A, c} , M _{A, c} can be obtained in the following [pseudo-code 1] steps.

[Start pseudo-code 1]

-Step 1: Initialize j to 0 and M _{A, c} to the empty set. Initialize k, a HARQ-ACK transmission timing index, to 0.

-Step 2: Set R as a set of each row in a table including slot information to which PDSCH is mapped, start symbol information, number of symbols or length information. If the PDSCH-capable mapping symbol indicated by each value of R is set as the UL symbol according to the DL and UL settings set in the upper layer, the corresponding row is deleted from R.

-Step 3-1: If the UE can receive one PDSCH for unicast in one slot, and R is not empty _, add one to the set M _{A, c} .

-Step 3-2: If the UE can receive more than one unicast PDSCH in one slot, count the number of PDSCHs that can be allocated to different symbols in the calculated R and add the corresponding number to M _{A, c} .

-Step 4: Start from step 2 by increasing k by 1.

[end of pseudo-code 1]

Referring to FIG. 3 for the above-described psudo-code 1, to perform HARQ-ACK PUCCH transmission in slot # k (308), PDSCH-to-HARQ-ACK timing that can indicate slot # k (308) All of these possible slot candidates are considered.

In FIG. 3, slot # k (308) by a combination of PDSCH-to-HARQ-ACK timing that only PDSCHs scheduled in slot # n (302), slot # n + 1 (304), and slot # n + 2 (306) are possible ), It is assumed that HARQ-ACK transmission is possible. In addition, the maximum number of PDSCHs that can be scheduled for each slot is derived by considering the time domain resource setting information of the PDSCHs that can be scheduled in slots 302, 304, and 306 and information indicating whether the symbols in the slots are downlink or uplink.

For example, when the maximum scheduling is possible for 2 PDSCHs in slot 302, 3 PDSCHs in slot 304, and 2 PDSCHs in slot 306, the maximum number of PDSCHs included in the HARQ-ACK codebook transmitted in slot 308 is total. Seven. This is called the cardinality of the HARQ-ACK codebook.

4 is a diagram showing a method of setting a dynamic HARQ-ACK codebook in an NR system.

The UE is based on PDSCH-to-HARQ_feedback timing value for PUCCH transmission of HARQ-ACK information in slot n for PDSCH reception or SPS PDSCH release, and K0, which is a PDSCH transmission slot location information scheduled in DCI format 1_0 or 1_1. , HARQ-ACK information transmitted in one PUCCH in the corresponding slot n is transmitted. Specifically, for the above-described HARQ-ACK information transmission, the UE, based on the DAI included in the DCI indicating the PDSCH or SPS PDSCH release, of the PUCCH transmitted in the slot determined by PDSCH-to-HARQ_feedback timing and K0 Determine the HARQ-ACK codebook.

DAI consists of Counter DAI and Total DAI. Counter DAI is information in which HARQ-ACK information corresponding to a PDSCH scheduled in DCI format 1_0 or DCI format 1_1 indicates the location in the HARQ-ACK codebook. Specifically, the value of the counter DAI in DCI format 1_0 or 1_1 indicates the cumulative value of PDSCH reception or SPS PDSCH release scheduled by DCI format 1_0 or DCI format 1_1 in a specific cell c. The above-described accumulated value is set based on the PDCCH monitoring occasion and the serving cell where the scheduled DCI exists.

Total DAI is a value that indicates the size of the HARQ-ACK codebook. Specifically, the value of Total DAI refers to the total number of previously scheduled PDSCH or SPS PDSCH releases, including when the DCI was scheduled. In addition, Total DAI is a parameter that is used when HARQ-ACK information in a serving cell c also includes HARQ-ACK information for a PDSCH scheduled in another cell including the serving cell c in a CA (Carrier Aggregation) situation. In other words, there is no Total DAI parameter in a system operating with one cell.

 An example of operation for DAI is in FIG. 4. 4, when the UE transmits the HARQ-ACK codebook selected based on the DAI in the nth slot of the carrier 0 402 to the PUCCH 420 in a situation where the UE has set two carriers, the PDCCH set for each carrier It is a diagram showing changes in the values of Counter DAI (C-DAI) and Total DAI (T-DAI) indicated by DCI searched for each monitoring occasion.

First, in DCI searched at m = 0 (406), C-DAI and T-DAI indicate a value 412 of 1, respectively. In DCI searched at m = 1 408, C-DAI and T-DAI indicate a value 414 of 2, respectively. DCI searched for carrier 0 (c = 0, 402) of m = 2 410 indicates that the C-DAI indicates a value 416 of 3. DCI found in carrier 1 (c = 1, 404) of m = 2 410 indicates that the C-DAI indicates a value 418 of 4. At this time, when carriers 0 and 1 are scheduled in the same monitoring occasion, T-DAI is all indicated as 4.

In FIG. 3 and FIG. 4, the HARQ-ACK codebook determination is operated in a situation in which only one PUCCH containing HARQ-ACK information is transmitted in one slot. This is called mode 1. As an example of a method in which one PUCCH transmission resource is determined in one slot, when the PDSCHs scheduled in different DCIs are multiplexed and transmitted in one HARQ-ACK codebook in the same slot, the PUCCH selected for HARQ-ACK transmission The resource is determined as the PUCCH resource indicated by the PUCCH resource field indicated in the DCI that last scheduled the PDSCH. That is, the PUCCH resource indicated by the PUCCH resource field indicated in the DCI scheduled before DCI is ignored.

The following description defines HARQ-ACK codebook determination methods and devices in a situation in which two or more PUCCHs containing HARQ-ACK information can be transmitted in one slot. This is called mode 2. The UE may be able to operate only in mode 1 (transmit only one HARQ-ACK PUCCH in one slot) or in mode 2 (transmit one or more HARQ-ACK PUCCH in one slot). Alternatively, a terminal supporting both mode 1 and mode 2 is configured such that the base station operates only in one mode by higher-level signaling, or mode 1 and mode 2 are determined implicitly by DCI format, RNTI, DCI specific field value, or scrambling. It may be possible. For example, PDSCH scheduled in DCI format A and HARQ-ACK information associated with it are based on mode 1, and PDSCH scheduled in DCI format B and HARQ-ACK information associated with it are based on mode 2.

5 is a diagram for explaining a method of setting a HARQ-ACK codebook of a terminal.

In order for the UE to transmit PUCCHs including a plurality of HARQ-ACK information in one slot, the base station may separately set the PUCCH resource indicator included in the scheduling DCI. The PUCCH resource field may have 3 bits or other values in DCI. As an example, the 3-bit PUCCH resource field may indicate 8 different PUCCH resources. The slot to which the corresponding PUCCH resources are applied may be determined by a PDSCH-to-HARQ-ACK timing field and a time domain resource field. Elements constituting the PUCCH resource include PUCCH transmission format, PUCCH frequency and time resource.

Accordingly, the base station may set PUCCH resources not to overlap each other in terms of time resources with higher signaling. Or, even if the PUCCH resources overlap each other in terms of time resources, when DCI scheduling, the PUCCHs including a plurality of HARQ-ACK information transmitted in one slot may be scheduled so that they do not overlap in terms of time. In this way, the UE can perform multiple PUCCH transmissions including HARQ-ACK information in one slot.

For example, the HARQ-ACK PUCCH resource to be transmitted in slot n through DCI 1 is scheduled to exist in 1 to 3 symbols, and the HARQ-ACK PUCCH resource to be transmitted in slot n through DCI 2 is present in 7 to 10 symbols. When scheduling, the two HARQ-ACK PUCCH resources do not overlap in terms of time resources. Such an operation may be possible by PUCCH resource setting or DCI scheduling. As another example, when the HARQ-ACK PUCCH resource scheduled by the base station in DCI 1 and DCI 2 is at least partially overlapped in the time domain, UE and base station operations need to be defined. The following methods may exist.

-Method 1: Multiplex all of the scheduled PDSCH HARQ-ACK information based on the semi-static HARQ-ACK codebook to the PUCCH resource scheduled in the latest DCI.

As an example of method 1, when the HARQ-ACK PUCCH resources scheduled by DCI 1 and DCI 2 are overlapped at least partially, and DCI 2 is a DCI transmitted later, in DCI 1, in HARQ-ACK PUCCH resources scheduled by DCI HARQ-ACK information for the PDSCH scheduled in the scheduled PDSCH and DCI 2 is transmitted. The HARQ-ACK information setting follows a semi-static HARQ-ACK codebook determined from the HARQ-ACK PUCCH resource indicated by DCI 2. In other words, the HARQ-ACK PUCCH resource scheduled in DCI 1 is ignored by the UE.

-Method 2: Multiplex all scheduled PDSCH HARQ-ACK information based on semi-static HARQ-ACK codebook on PUCCH resources located temporally

As an example of method 2, the HARQ-ACK PUCCH resources scheduled by DCI 1 and DCI 2 are at least partially overlapped, and among them, the HARQ-ACK PUCCH resource indicated by DCI 1 is greater than the HARQ-ACK PUCCH resource indicated by DCI 2. When it is late in time, even if the scheduling of DCI 2 is delayed in time, the UE performs HARQ-ACK on the HARQ-ACK PUCCH resource indicated in DCI 1, for the PDSCH scheduled in DCI 1 and the PDSCH scheduled in DCI 2 The information is multiplexed and transmitted. At this time, the HARQ-ACK codebook is based on the HARQ-ACK PUCCH resource indicated by DCI 1.

-Method 3: Among PUCCH resources overlapped with each other, time domain resources of a specific PUCCH resource are applied except for overlapping parts.

As an example of method 3, when the HARQ-ACK PUCCH resource indicated by DCI 1 and the HARQ-ACK PUCCH resource indicated by DCI 2 overlap at least partially, a time domain resource for the HARQ-ACK PUCCH resource of DCI 1 or DCI 2 The terminal may determine that it is applied except for the overlapping portion. That is, even if the HARQ-ACK PUCCH is set to be overlapped, the UE can reset to HARQ-ACK PUCCHs that do not overlap each other by applying the overlapping portion of a specific PUCCH time domain resource among the overlapped HARQ-ACK PUCCHs. Accordingly, the UE may transmit the PDSCH scheduled in DCI 1 to the HARQ-ACK PUCCH indicated in the same DCI, and the PDSCH scheduled in DCI 2 may transmit to the HARQ-ACK PUCCH indicated in the same DCI.

The methods 1 to 3 described above may or may not be applied in certain conditions. For example, when HARQ-ACK PUCCH resources indicated by different DCIs are completely the same in the time domain, only method 1 may be applied.

The embodiments described below are examples for a case in which the terminal supports mode 2. Specifically, the terminal may be a terminal operating only in mode 2, or an operation in mode 2 may be indicated by a higher signaling or L1 signaling from a base station.

The following [Example 1-1] to [Example 1-4] are descriptions of a method for determining a semi-static HARQ-ACK codebook, and [Example 2-1] to [Example 2-3] This is a description of a method for determining a dynamic HARQ-ACK codebook.

[Example 1-1] Processing time is not satisfied, but NACK is set for the scheduled PDSCH

The UE may include HARQ-ACK information for PDSCHs satisfying UE processing time in a preset HARQ-ACK codebook on a slot basis in which HARQ-ACK information is transmitted in a PUCCH resource indicated by DCI. Specifically, the UE may report the ACK or NACK to the base station for the PDSCH. The values in the HARQ-ACK codebook corresponding to the slot not indicated by DCI may be reported by the terminal to the base station as NACK.

In addition, the number of PDSCHs that can be scheduled with a maximum time division multiplexing (TDM) in a specific slot is n. If less than n PDSCHs are scheduled, the rest of the values may be reported by the terminal as a NACK. In addition, even if the actual PDSCH is scheduled by DCI, if the time difference between the time domain resource and the PDSCH where the HARQ-ACK PUCCH is indicated and the PUCCH resource is located is smaller than the processing time supported by the UE, the UE NACKs the corresponding PDSCH. Can report.

For example, referring to FIG. 5, in slot #n 502, the UE may schedule up to three PDSCHs. When the PDSCH-to-HARQ-ACK timing has only a value of 1, the HARQ-ACK codebook in slot # n + 1 504 may consist of a total of 3 bits. The above-mentioned meaning of being able to schedule up to three PDSCHs is that the UE can receive up to three PDSCHs by TDM in a corresponding slot. The above-described contents may be derived from a 'PDSCH time domain resource configuration information table' including information such as a slot, a start symbol, and a length in which a PDSCH configured as a higher level signaling is located. When there is no upper signaling information, the terminal follows the table set as the default, and the following [Table 4] is an example.

[Table 4] Default PDSCH time domain resource allocation A for normal CP

Referring to FIG. 5, the UE may receive three PDSCH 506, PDSCH 508, and PDSCH 510. And, DCI scheduling PDSCH 506 indicates HARQ-ACK PUCCH resource 512, DCI scheduling PDSCH 508 indicates HARQ-ACK PUCCH resource 514, and scheduling PDSCH 510. One DCI may indicate HARQ-ACK PUCCH resource 516.

The HARQ-ACK codebook has the same HARQ-ACK codebook regardless of the HARQ-ACK PUCCH resources set in slot n + 1 504. For reference, the HARQ-ACK codebook is determined by [pseudo code 1]. The HARQ-ACK codebook may be basically present without considering terminal processing time. Alternatively, the HARQ-ACK codebook may be determined based on the maximum number of PDSCHs capable of indicating a corresponding PUCCH resource when transmitting HARQ-ACK PUCCH in a specific slot based on a value set as upper signaling.

Therefore, referring to FIG. 5, regardless of HARQ-ACK PUCCH resource, the HARQ-ACK codebook that can be transmitted to the corresponding HARQ-ACK PUCCH may be only PDSCHs scheduled in the last slot. In addition, since up to three PDSCHs can be scheduled in the immediately preceding slot, the HARQ-ACK codebook of slot # n + 1 may include three bit information. Accordingly, in FIG. 5, the HARQ-ACK codebooks transmitted to the PUCCH 512, PUCCH 514, and PUCCH 516 are 518, 520, and 522, respectively, and have three bit sizes.

Since the HARQ-ACK codebook decision does not take into account the actual terminal processing time, a HARQ-ACK transmission method reflecting this is needed. Here, the terminal processing time means a minimum time required for the UE to schedule the PDSCH through DCI and transmit the demodulation / decoding results to HARQ-ACK information. As an example, the following [Table 5] or [Table 6] means the PDSCH processing time of the terminal.

[Table 5]

[Table 6]

For reference, μ in Table 5 or Table 6 may mean the subcarrier spacing. μ may mean a subcarrier interval in frequency units or a multiple rule for a predetermined unit frequency value. μ = 0 and μ = 15kHZ may have the same meaning. However, it is not necessarily limited thereto.

For example, in FIG. 5, when the minimum PDSCH processing time of the UE for PDSCH 506 is 526, the minimum PDSCH processing time of the UE for PDSCH 508 is 528, and the minimum PDSCH processing time of the UE for PDSCH 510 is 530, PUCCH. 512 cannot include HARQ-ACK information for PDSCH 508 and PDSCH 510 because of the minimum processing time of the UE PDSCH. Also, PUCCH 514 cannot include HARQ-ACK information for PDSCH 510 because of the minimum processing time of the UE PDSCH.

Therefore, even in PDSCH scheduled by DCI, the UE reports NACK for PDSCHs that do not satisfy the PDSCH minimum processing time based on the PUCCH time domain resource for transmitting HARQ-ACK information. Specifically, the UE reports valid HARQ-ACK information of ACK or NACK only to PDSCHs satisfying the minimum PDSCH processing time of the HARQ-ACK codebook, and reports all other as NACK. For example, in FIG. 5, the UE reports HARQ-ACK 518 information for PUCCH 512, HARQ-ACK 520 information for PUCCH 514, and HARQ-ACK 522 information for PUCCH 516, respectively.

[Example 1-2] Set HARQ-ACK codebook for each PUCCH resource in consideration of PDSCH that can be scheduled while processing time is satisfied

The UE transmits HARQ-ACK for the PDSCH indicated by the same DCI to the PUCCH resource time domain resource indicated by the PUCCH resource indicator (ARI) of DCI. When the HARQ-ACK codebook is set to semi-static, the UE determines the HARQ-ACK codebook in consideration of PDSCH-to-HARQ-ACK timing, slot K0 in which the PDSCH is scheduled, time domain resource of PUCCH resource, and processing time. . PDSCH-to-HARQ-ACK timing is a field indicative of a slot value in which HARQ-ACK information for PDSCH is transmitted / received based on a slot in which DCI-scheduled PDSCH is transmitted / received.

For example, if the PDSCH-to-HARQ-ACK timing value is 1, if the PDSCH scheduled by the DCI is in the n-th slot, HARQ-ACK information for the PDSCH is transmitted from the n + 1 th slot to the base station. do. The slot K0 in which the PDSCH is scheduled is a value indicating a difference between a slot in which the DCI is transmitted and received and a slot in which the PDSCH scheduled by the DCI is transmitted and received.

For example, when the slot K0 in which the PDSCH is scheduled is 0, it means that the slot in which the DCI is transmitted and received and the slot in which the PDSCH scheduled in the corresponding DCI are transmitted and received are the same. As a time domain resource of the PUCCH resource, each of the PUCCH resources may have a start symbol and a symbol length determined. And, one of the PUCCH resources set up to n can be selected through DCI. And, the selected PUCCH resources may include a time domain resource for a start symbol and a symbol length implicitly set as upper signaling. In addition, PUCCH resource upper settings may include PUCCH format and frequency domain information that can be transmitted to a corresponding resource.

 The processing time refers to a minimum time required for processing a terminal after the terminal receives the PDSCH and processes it and then transmits HARQ-ACK. The processing time may have different values depending on the subcarrier interval value. For example, if the processing time is 8 symbols based on 15 kHz, the UE should immediately place the 8 symbols after the PDSCH, the PUCCH or PUSCH resource containing HARQ-ACK information for the corresponding PDSCH immediately after receiving the PDSCH. Means

6 is a view for explaining the operation of the [first 1-2 embodiments] according to embodiments of the present disclosure.

Similar to that described with reference to FIG. 5, the UE may receive up to three PDSCHs in the n-th slot 602 in a TDM manner. It is assumed that the value of K2, PDSCH-to-HARQ ACK timing, is 1.

When the UE refers to the time domain resource table 640 that can be scheduled in DCI, row indexes 2, 4, and 6 can be transmitted and received in the nth slot 602 without overlapping the PDSCH in terms of time domain resources. Specifically, three different DCIs indicate row indexes 2, 4, and 6, respectively, in the n-th slot, and corresponding PDSCHs can be transmitted and received.

According to the method of Figure 5, regardless of the location of the PUCCH resources that can be transmitted in the n + 1 th slot 604, they all have the same HARQ-ACK codebook size. On the other hand, in FIG. 6, since the PUCCH resources already include time domain resource information as upper signaling, the time domain resource information of the PDSCH corresponding to HARQ-ACK information that can be transmitted / received to each PUCCH resource is also determined at the terminal processing time. It may be limited accordingly.

For example, in FIG. 6, PDSCH 606, PDSCH 608, and PDSCH 610 are transmitted / received in the n-th slot, and PUCCH including HARQ-ACK information corresponding thereto is transmitted / received to 618, 620, 622 in the n + 1th slot, respectively. . At this time, the PDSCH corresponding to the HARQ-ACK information that can be transmitted and received on the PUCCH 612, considering the terminal processing time, only the PDSCH corresponding to row index 6 of 640 may be possible. Accordingly, the size of the HARQ-ACK codebook of PUCCH 612 may be only 1 based on the terminal processing time and the PDSCH time domain resource allocation information table. Specifically, when describing a method for determining a PDSCH for determining an HARQ-ACK codebook, only PDSCHs corresponding to a UE processing time value based on a PUCCH resource start symbol to which the HARQ-ACK codebook is transmitted and received may be included in the HARQ-ACK codebook. By this method, the codebook size of PUCCH 618 may be 1, the codebook size of PUCCH 620 may be 2, and the codebook size of PUCCH 622 may be 3.

That is, in the situation in which PDSCH-to-HARQ-ACK timing is 1 in FIG. 6, the size of the HARQ-ACK codebook that can be transmitted and received in PUCCH 654 of slot n + 1 658 is 650 in consideration of terminal processing time 652. It may be determined by the maximum number of PDSCHs that can be scheduled by TDM in the interval.

Or, if the PDSCH-to-HARQ-ACK timing in FIG. 6 is set to include a value of 1, the size of the HARQ-ACK codebook that can be transmitted and received in PUCCH 654 of slot n + 1 (658) is based on each slot. , (n + 1)-(PDSCH-to-HARQ-ACK timing) may be set to the maximum number of PDSCHs that can be scheduled by TDM, respectively. In particular, the size of the HARQ-ACK codebook for slot n 656 may be determined as the maximum number of PDSCHs that can be scheduled by TDM in 650 intervals considering the terminal processing time 652. The maximum number of PDSCHs that can be scheduled with the TDM can be derived based on possible PDSCH time domain resource values included in DCI.

[Example 1-3] When the PUCCH resource is set, PDSCH candidate groups capable of transmitting HARQ-ACK information to the corresponding PUCCH resource are set as slot and symbol indexes.

The base station may set PUCCH resources that the UE can transmit and receive. The PUCCH resource includes PUCCH format, time domain resource information of the PUCCH resource (for example, a start symbol and a symbol length) and candidate PDSCH interval information corresponding to HARQ-ACK information transmitted and received from the PUCCH resource (K0 and Symbol area, etc.).

In other words, the HARQ-ACK codebook can be determined for each PUCCH resource. In order to determine the corresponding HARQ-ACK codebook, the PUCCH resource upper configuration information may include time resource region information of a possible PDSCH capable of transmitting and receiving HARQ-ACK information.

Referring to FIG. 7 as an example, K2 (PDSCH-to-HARQ ACK timing) = 1, PDSCH time resource = {1) in PUCCH resource configuration information 714 in which HARQ-ACK information is transmitted / received in slot n + 1 712. , 2, ..., 14}, the size of the HARQ-ACK codebook that can be transmitted / received by the corresponding PUCCH resource is the maximum number of PDSCHs that can be scheduled by TDM in symbols 0 to 13 in slot n (710). Can be the same as

From the PDSCH time domain resource allocation information of FIG. 7, if the PDSCH 702, PDSCH 704, and PDSCH 706 are combinations that can be scheduled with TDM, the HARQ-ACK codebook size that can be transmitted / received by the PUCCH resource 708 is 3.

As another example, if K2 (PDSCH-to-HARQ ACK timing) = 1, PDSCH time resource = {5, 6, ..., 9}, possible PDSCH combination for determining HARQ-ACK codebook, that is, HARQ -ACK information The number of PDSCHs that can be scheduled with TDM between symbols 6 to 10 in the slot immediately before and after the slot to be transmitted / received will be the HARQ-ACK codebook.

Although only one PUCCH resource has been described in FIG. 7, different PUCCH resources may have different K2 or PDSCH time resources.

[Example 1-4] Implicitly possible PDSCH candidate group setting using starting symbol and symbol count information among existing PUCCH resource setting information. And, consider processing time.

In [Example 1-4], HARQ-ACK codebook is determined for each PUCCH resource similar to [Example 1-3]. However, in [Example 1-4], in determining the HARQ-ACK codebook, the PDSCH time domain resource corresponding to the HARQ-ACK information is not explicitly included in the PUCCH resource configuration information, and among the existing PUCCH resource configuration information It is determined by the starting symbol index (startingsymbolindex) and the number of symbols (nrofsymbols).

Referring to FIG. 8 as an example, the start symbol index 4 (812) and the symbol of the immediately preceding slot, through the start symbol index 4 and symbol length 4 of the information 810 set as higher signaling in PUCCH resource 808 in slot n + 1 (804). The size of the HARQ-ACK codebook determined in the corresponding PUCCH resource may be determined by the maximum number of PDSCHs that can be scheduled by TDM within length 4 (814). Although the example of FIG. 8 is limited to the last slot, a method considering terminal processing time is also possible. As an example, the PDSCH scheduling time domain for HARQ-ACK codebook determination may be considered by the following equation.

[Mathematics starts]

PDSCH time domain = {startingsymbolindex-N1 (UE processing time for PDSCH-to-HARQ ACK), ..., startingsymbolindex + 1-N1 (UE processing time for PDSCH-to-HARQ ACK), startingsymbolindex + nrofsymbols-N1 (UE processing time for PDSCH-to-HARQ ACK)}

[End of Mathematical Formula]

The UE may determine the HARQ-ACK codebook in consideration of the maximum number of PDSCHs that can be scheduled with TDM in the PDSCH time domain based on the above equation.

[Example 2-1] When one PUCCH resource set exists, DAI operation for each PUCCH resource

In the Rel-15 based 5G system or NR system, depending on the type of PUCCH resource set, up to 8 PUCCH resources are set in the PUCCH resource set, up to 32 PUCCH resources are set in the PUCCH resource set, or up to the PUCCH resource set Four PUCCH resource sets can be configured. Specifically, up to 32 PUCCH resources may exist in PUCCH resource set 0, and up to 8 PUCCH resources may exist in PUCCH resources 1 to 3.

There is a PUCCH resource indicator field of up to 3 bits in DCI, and one of up to 8 PUCCH resources with 3 bits can be selected as DCI. If more than 8 PUCCH resources are configured in PUCCH resource 0, the UE performs DCI 3-bit ACK (Ack / Nack Resource Indicator) and CCE index information of the corresponding DCI-scheduled CORESET (for example, the total number of CCEs). , PUCCH resource may be selected by separately considering the index of the first CCE for PDCCH reception. In the Rel-15 based 5G or NR system, the dynamic HARQ-ACK codebook is determined by considering slot K0 and PDSCH-to-HARQ ACK timing K2 in which PDSCH is scheduled by DCI.

For example, two different DCIs schedule different PDSCHs, but when indicating that HARQ-ACK information is transmitted in the same slot, the two DCIs belong to the same DAI group. When the two DCIs belong to the same DAI group, the DAI values of the DCIs transmitted and received later are accumulated based on the DAI values of the DCIs transmitted and received first among the two DCIs.

As an example, if two DCIs indicate different PDSCHs, but the slots with PUCCH resources through which the same HARQ-ACK information is transmitted and received are the same, if the DAI value of the first DCI transmitted and received is 1, then transmitted and received afterwards The DCI has a DAI value of 2.

That is, the quasi-static HARQ-ACK codebook is determined by the size and shape based on PDSCH-to-HARQ ACK timing, UL / DL slot structure, PDSCH time domain resource information, etc., which are basically set as upper signaling, whereas dynamic HARQ -ACK codebook determines the size of HARQ-ACK codebook to be transmitted in a specific slot by L1 signaling (DCI).

If PUCCH transmission including two or more HARQ-ACK information is possible within one slot, two PUCCHs indicate whether different PUCCH transmissions having different HARQ-ACK information will be transmitted according to Rel-15 criteria. They will be in the same DAI group. For example, although two different DCIs indicate the TDM PUCCH resource in which HARQ-ACK information is transmitted and received in one slot, the HARQ-ACK codebook associated with each PUCCH resource is HARQ-ACK codebook information scheduled in different DCIs. You may also have to include.

To solve this, the following methods can be considered.

-Method 1: It is determined that DCIs (or PDCCH monitoring occasions) indicating the same PUCCH resource indicator value are the same DAI group.

Referring to FIG. 9 as an example, in the case of 900 of FIG. 9, DCI (or PDCCH monitoring occasion) 906 and DCI (or PDCCH monitoring occasion) 908 transmitted and received in slot n 902 are the same PUCCH resource located in slot k 904. When the indicator value 910 is selected, two DCIs share the same DAI counter.

Specifically, when DCI 906 selects (912) PUCCH resource (910) and DCI 908 selects (914) PUCCH resource (910), the DAI value of DCI 908 is updated based on the DAI value of DCI 906. . For example, if the PUCCH resource 910 only indicates DCI 906 and DCI 908, the counter DAI of DCI 906 will indicate 1, and the counter DAI of DCI 908 will indicate 2.

In addition, the UE, based on the PDSCH-to-HARQ_feedback timing value, the slot offset K0, the PUCCH resource value, to transmit HARQ-ACK information in the PUCCH resource indicated by the ARI in slot n, the activated bandwidth interval of the serving cell c In (BWP, Bandwidth Part), a PDCCH monitoring ocassion associated with DCI format 1_0 or DCI format 1_1 for SPS PDSCH release or PDSCH reception may be determined.

-Method 2: DCI (or PDCCH monitoring occasion) indicating PUCCH resource indicator values having the same time domain resource is determined as the same DAI group.

Referring to FIG. 9 as an example, in the case of 920 of FIG. 9, DCI (or PDCCH monitoring occasion) 926 transmitted and received in slot n 922 indicates PUCCH resource 930 of slot k 924 (934) and DCI ( Alternatively, the PDCCH monitoring occasion) 928 indicates (932) the PUCCH resource 932 of the slot k (924).

When two PUCCH resources 930 and 932 have the same time domain resource as shown in FIG. 9, the two DCIs are located in the same DAI group. Specifically, when the (counter) DAI value of DCI 926 is 1, the (counter) DAI value of DCI 928 will be 2. In addition, PUCCH resources for which HARQ-ACK information for PDSCH or SPS PDSCH release scheduled in two DCIs 926 and 928 will be reported follows the PUCCH resource indicated by the last DCI.

In addition, the UE activates the serving cell c based on the PDSCH-to-HARQ_feedback timing value, the slot offset K0, and the time domain resource of the PUCCH resource in order to transmit HARQ-ACK information in the PUCCH resource indicated by the ARI in slot n. PDCCH monitoring ocassion associated with DCI format 1_0 or DCI format 1_1 for SPS PDSCH release or PDSCH reception may be determined in a bandwidth section (BWP, Bandwidth Part).

-Method 3: DCI (or PDCCH monitoring occasion) indicating PUCCH resource indicator values having at least some overlapping time domain resources is determined as the same DAI group.

Referring to FIG. 9 as an example, in the case of 940 of FIG. 9, DCI (or PDCCH monitoring occasion) 946 transmitted and received in slot n 942 instructs (954) PUCCH resource 950 of slot k 944, and DCI ( Or, PDCCH monitoring occasion) 948 indicates (956) PUCCH resource 952 of slot k (944).

9, when two PUCCH resources 950 and 952 have at least some overlapping time domain resources, the UE determines that DCI 946 and DCI 948 indicating the two PUCCH resources 950 and 952 are the same DAI group. Specifically, when the (counter) DAI value of DCI 946 is 1, the (counter) DAI value of DCI 948 will be 2. In addition, the PUCCH resource for which HARQ-ACK information for PDSCH or SPS PDSCH release scheduled in two DCIs 946 and 948 will be reported follows the PUCCH resource indicated by the last DCI.

In addition, the UE, based on the time domain resource of the PDSCH-to-HARQ_feedback timing value, slot offset K0, PUCCH resource, in order to transmit HARQ-ACK information in the PUCCH resource indicated by ARI in slot n, the activation of the serving cell c PDCCH monitoring ocassion associated with DCI format 1_0 or DCI format 1_1 for SPS PDSCH release or PDSCH reception may be determined in a bandwidth section (BWP, Bandwidth Part).

For reference, FIG. 9 is a diagram for explaining a situation in which a terminal is not configured with a CA.

The DAI may be mapped in ascending order according to the search space ID and PDCCH monitoring occasion.

In order to support the above-described method 1, the UE may not expect that the PUCCH resources indicated by the PUCCH resource indicators indicated by different DCIs overlap at least partially in terms of time.

In order to support the above-described method 2, the UE may not expect that at least a part of the PUCCH resources indicated by the PUCCH resource indicators indicated by different DCIs are completely overlapped or not overlapped in terms of time.

For example, when two DCIs have the same DAI group, the DAI of the second DCI may be accumulated based on the DAI value of the first DCI. Although the PUCCH resource indicator has the same value, since the PUCCH resources may be different for each PUCCH resource set, the methods described in FIG. 9 can be applied in a situation where only one PUCCH resource set is limited.

Alternatively, if the base station makes PUCCH resources having the same ARI for each PUCCH resource set the same as time or frequency resources, or if the base station and the terminal set PUCCH resources for each PUCCH resource set without ambiguity, even when one or more PUCCH resource sets are set The methods described with reference to 9 can be applied.

[Example 2-2] When multiple PUCCH resource sets exist, the DCI information includes PUCCH resource set indicator information (or discards the concept of PUCCH resource set)

The UE may select one PUCCH resource among a plurality of PUCCH resources set in a specific PUCCH resource set as an ARI in DCI. Further, the PUCCH resource set may be determined according to the size of uplink control information (UCI), such as HARQ-ACK information, scheduling request (SR), and channel state information (CSI). .

For example, if the UCI bit to be transmitted in a specific PUCCH resource is 2 bits or less, PUCCH resource set 0 is selected, and if it is more than that, PUCCH resource 1 may be selected. Therefore, different PUCCH resources may exist for each PUCCH resource set even though the ARI has the same value. Therefore, when two or more PUCCH resource sets are set, among the methods described in the [2-1 embodiment], it may be difficult to determine a time domain resource overlap relationship. That is, the two PUCCH resources indicated by the ARI are overlapped on the basis of PUCCH resource set 1 and may not overlap on the basis of PUCCH resource set 2. Therefore, if more than one PUCCH resource set is set, there will be a limit to applying DAI counter based on ARI.

Therefore, in order to solve this, PUCCH resource set indicator may be included in the DCI. Alternatively, higher configuration information may be received to include one PUCCH resource set information for each PUCCH resource. Alternatively, the PUCCH resource set value itself may also be set as higher level signaling.

[Example 3-1] DCI designed for URLLC purposes may have a one-to-one mapping relationship with one PDSCH and HARQ-ACK resource, and the HARQ-ACK codebook may not be operated.

For a terminal operating URLLC and eMBB at the same time, the HARQ-ACK codebook can be operated by considering only the eMBB PDSCH.

HARQ-ACK information scheduled by actual URLLC may not be included in the eMBB PUCCH. URLLC PDSCH may be transmitted as one HARQ-ACK information.

When eMBB HARQ-ACK PUCCH and URLLC HARQ-ACK PUCCH are TDM in one slot, the UE reports HARQ-ACK information to the two PUCCH resources, respectively, to the base station.

If at least some FDM of eMBB HARQ-ACK PUCCH and URLLC HARQ-ACK PUCCH in one slot, the UE drops HARQ-ACK report to PUCCH resource corresponding to eMBB PDSCH and HARQ-ACK report to PUCCH resource corresponding to URLLC PDSCH Performs.

When the UE supports eMBB and URLLC at the same time, such a service may be classified through a priority value associated with a bearer from a higher point of view. Alternatively, services may be classified by DCI format or RNTI or search space or CORESET from the L1 point of view. This is called the L1 separator. Through this, it may be possible to distinguish between the eMBB PDSCH and the URLLC PDSCH.

For example, PDSCH or PUSCH scheduled in DCI format 1_0, 1_1, 0_0, 0_1 may be for eMBB service, and PDSCH or PUSCH scheduled in DCI format x_x may be for URLLC service.

Alternatively, PDSCH or PUSCH scheduled with C-RNTI and CS-RNTI may be for eMBB service, and PDSCH or PUSCH scheduled with URLLC-C-RNTI may be for URLLC service.

Alternatively, the DCI detected in the URLLC search space may be PDSCH or PUSCH for the URLLC service, and the DCI detected in the eMBB search space may be PDSCH or PUSCH for the eMBB service.

Alternatively, the DCI detected in the URLLC CORESET may be PDSCH or PUSCH for the URLLC service, and the DCI detected in the eMBB CORESET may be the PDSCH or PUSCH for the eMBB service.

When the UE determines the eMBB service by the above-described L1 delimiter, a semi-static or dynamic HARQ-ACK codebook is applied by preset upper signaling.

Alternatively, when the terminal determines the URLLC service by the L1 delimiter described above, the semi-static or dynamic HARQ-ACK codebook is not applied by the preset upper signaling. That is, HARQ-ACK information corresponding to a PDSCH scheduled by one DCI is transmitted and received on a PUCCH or PUSCH without being multiplexed. Therefore, in the DCI determined as the URLLC service, the dynamic HARQ-ACK codebook or the semi-static HARQ-ACK codebook using the DAI field is not applied.

If the PUCCH resource indicated for eMBB PDSCHs and the PUCCH resource indicated for URLLC PDSCHs are indicated as TDM in a specific slot, the UE reports HARQ-ACK information to the two PUCCH resources, respectively, to the base station.

On the other hand, when the PUCCH resource indicated for the eMBB PDSCHs and the PUCCH resource indicated for the URLLC PDSCH are FDM or directed to overlap at least some time resource regions in a specific slot, the UE HARQ to the PUCCH resource corresponding to the eMBB PDSCH. -ACK report is dropped, and HARQ-ACK report to PUCCH resource corresponding to URLLC PDSCH is performed.

The above-described PDSCH or PUSCH for eMBB service may be an eMBB PDSCH or eMBB PUSCH. The PDSCH or PUSCH for the above-described URLLC service may be URLLC PDSCH or URLLC PUSCH.

10 is a flowchart illustrating a method of operating a terminal according to an embodiment of the present disclosure.

In step S1001, the terminal may receive a plurality of PDSCH from the base station.

In step S1003, the UE may determine HARQ-ACK codebook information for a plurality of PDSCHs based on HARQ-ACK timing information.

In step S1005, the UE may transmit a plurality of HARQ-ACKs for a plurality of PDSCHs to the base station through one slot based on the determined HARQ-ACK codebook information.

The step of determining the HARQ-ACK codebook information may include determining the HARQ-ACK codebook information based on the maximum number of PDSCHs that can be scheduled in one slot and the processing time of the terminal.

The step of determining the HARQ-ACK codebook information is based on the time resource of the PUCCH to which each of the plurality of HARQ-ACKs will be transmitted and the processing time of the terminal, the HARQ-ACK information for the PDSCH whose processing is not completed is through NACK. And determining information, instructing the base station to be reported.

The step of determining the HARQ-ACK codebook information is based on the time resource of the PUCCH to which each of the plurality of HARQ-ACKs will be transmitted and the processing time of the terminal, the maximum number of PDSCHs that can be scheduled for each of the plurality of PUCCHs, HARQ- The method may further include determining the size of the ACK codebook information.

Determining the HARQ-ACK codebook information includes determining HARQ-ACK codebook information based on configuration information of a PUCCH resource allocated to transmit each of a plurality of HARQ-ACKs, wherein the configuration information includes HARQ. -ACK timing information and a symbol index that may include at least one of a plurality of PDSCHs.

 Determining the HARQ-ACK codebook information may include determining HARQ-ACK codebook information based on configuration information of a PUCCH resource allocated to transmit each of a plurality of HARQ-ACKs and processing time of a terminal. have. The configuration information may include start and end symbol information of the PUCCH resource.

 The step of determining the HARQ-ACK codebook information may include determining the size of the HARQ-ACK codebook information based on the accumulated value of the DAI included in the DCI scheduling each of the plurality of PDSCHs. The cumulative value of DAI may be determined for each DAI group.

 The step of determining the HARQ-ACK codebook information may further include a step in which a plurality of DCIs selecting the same PUCCH resource indicator is set as one DAI group.

 The determining of the HARQ-ACK codebook may further include setting a plurality of DCIs each of which selects a plurality of PUCCH resource indicators having the same time domain resource as one DAI group.

 The determining of the HARQ-ACK codebook may further include determining a plurality of DCIs, each of which selects a plurality of PUCCH resource indicators having time domain resources in which some sections overlap, as one DAI group.

 The determining of the HARQ-ACK codebook information may further include a step of setting the DCI to include a PUCCH resource set indicator when there are multiple PUCCH resource sets including a plurality of PUCCH resources.

 The step of determining the HARQ-ACK codebook information may further include a step of setting to include one PDCCH resource set information for each PUCCH resource when there are multiple PUCCH resource sets including a plurality of PUCCH resources.

 The determining of the HARQ-ACK codebook information may further include receiving a PUCCH resource set through higher level signaling when there are multiple PUCCH resource sets including a plurality of PUCCH resources.

 The determining of the HARQ-ACK codebook includes: distinguishing the type of service that the terminal can support; And determining whether to apply at least one HARQ-ACK codebook among the HARQ-ACK codebook and the dynamic HARQ-ACK codebook based on the pre-established upper signaling, according to the type of the divided service. .

11 is a diagram schematically showing a structure of a terminal according to an embodiment of the present disclosure.

Referring to FIG. 11, the terminal may include a processor 1101, a transceiver 1102, and a memory 1103. In the present disclosure, a processor may be defined as a circuit or application specific integrated circuit or at least one processor.

The processor 1101 according to an embodiment of the present disclosure may control the overall operation of the terminal. For example, the processor 1101 may control signal flow between blocks to perform an operation according to the above-described flowchart. In addition, the processor 1101 can write and read data in the memory 1103. Also, the processor 1101 may perform functions of a protocol stack required by a communication standard. To this end, the processor 1101 may include at least one processor or a micro processor, or the processor 1101 may be part of a processor. Also, a part of the transceiver 1102 and the processor 1101 may be referred to as a communication processor (CP).

According to an embodiment of the present disclosure, the processor 1101 may control operations of the terminal described with reference to FIGS. 1 to 10.

The processor 1101 according to an embodiment of the present disclosure receives a plurality of PDSCHs from a base station by executing a program stored in the memory 1103, and based on HARQ-ACK timing information, HARQ- for a plurality of PDSCHs ACK codebook information may be determined, and a plurality of HARQ-ACKs for a plurality of PDSCHs may be transmitted to a base station through one slot based on the determined HARQ-ACK codebook information.

The transceiver 1102 according to an embodiment of the present disclosure may perform functions for transmitting and receiving a signal through a wireless channel. For example, the transceiver 1102 may perform a function of converting between a baseband signal and a bit stream according to a physical layer standard of the system. For example, when transmitting data, the transceiver 1102 may generate complex symbols by encoding and modulating a transmission bit string. Also, when receiving data, the transceiver 1102 may restore the received bit string through demodulation and decoding of the baseband signal. Also, the transceiver 1102 may upconvert the baseband signal into an RF band signal and transmit it through an antenna, and downconvert the RF band signal received through the antenna into a baseband signal. For example, the transmission / reception unit 1102 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, and an ADC. Also, the transmission / reception unit 1102 may include a plurality of transmission / reception paths. Furthermore, the transceiver 1102 may include at least one antenna array composed of a plurality of antenna elements. In terms of hardware, the transceiver 1102 may be composed of digital circuits and analog circuits (eg, radio frequency integrated circuit (RFIC)). Here, the digital circuit and the analog circuit may be implemented in one package. Also, the transceiver 1102 may include a plurality of RF chains.

The memory 1103 according to an embodiment of the present disclosure may store data such as a basic program, an application program, and setting information for operation of the terminal. The memory 1103 may be composed of volatile memory, nonvolatile memory, or a combination of volatile memory and nonvolatile memory. Then, the memory 1103 may provide stored data according to the request of the processor 1101. The memory 1103 may store at least one of information transmitted and received through the transceiver 1102 and information generated through the processor 1101.

12 is a diagram schematically showing a structure of a base station according to an embodiment of the present disclosure.

Referring to FIG. 12, the base station may include a processor 1201, a transceiver 1202, and a memory 1203. In the present disclosure, a processor may be defined as a circuit or application specific integrated circuit or at least one processor.

The processor 1201 according to an embodiment of the present disclosure may control the overall operation of the base station. For example, the processor 1201 may control signal flow between blocks to perform an operation according to the above-described flowchart. In addition, the processor 1201 can write and read data in the memory 1203. In addition, the processor 1201 may perform functions of the protocol stack required by the communication standard. To this end, the processor 1201 may include at least one processor or microprocessor, or the processor 1201 may be part of the processor. In addition, a part of the transceiver 1202 and the processor 1201 may be referred to as a communication processor (CP).

According to an embodiment of the present disclosure, the processor 1201 may control operations of the base station described with reference to FIGS. 1 to 23.

The processor 1201 transmits a plurality of PDSCHs to the terminal by executing a program stored in the memory 1203, and transmits a plurality of HARQ-ACKs for the plurality of PDSCHs based on the HARQ-ACK codebook information determined from the terminal. It can be received from the terminal through one slot.

The transceiver 1202 according to an embodiment of the present disclosure may perform functions for transmitting and receiving a signal through a wireless channel. For example, the transceiver 1202 may perform a function of converting between a baseband signal and a bit stream according to a physical layer standard of the system. For example, when transmitting data, the transceiver 1202 may generate complex symbols by encoding and modulating a transmission bit stream. In addition, when receiving data, the transceiver 1202 may restore the received bit string through demodulation and decoding of the baseband signal. Also, the transceiver 1202 may upconvert the baseband signal into an RF band signal and transmit it through an antenna, and downconvert the RF band signal received through the antenna into a baseband signal. For example, the transmission / reception unit 1202 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, and an ADC. Also, the transmission / reception unit 1202 may include a plurality of transmission / reception paths. Furthermore, the transceiver 1202 may include at least one antenna array composed of a plurality of antenna elements. In terms of hardware, the transceiver 1202 may be composed of a digital circuit and an analog circuit (eg, radio frequency integrated circuit (RFIC)). Here, the digital circuit and the analog circuit may be implemented in one package. Also, the transceiver 1202 may include multiple RF chains.

The memory 1203 according to an embodiment of the present disclosure may store data such as a basic program, an application program, and configuration information for operation of a base station. The memory 1203 may be composed of volatile memory, nonvolatile memory, or a combination of volatile memory and nonvolatile memory. In addition, the memory 1203 may provide data stored at the request of the processor 1201. The memory 1203 may store at least one of information transmitted and received through the transceiver 1202 and information generated through the processor 1201.

Methods according to embodiments described in the claims or specification of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

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

Such programs (software modules, software) include random access memory, non-volatile memory including flash memory, read only memory (ROM), and electrically erasable programmable ROM. (EEPROM: Electrically Erasable Programmable Read Only Memory), magnetic disc storage device (CD-ROM: Compact Disc-ROM), digital versatile discs (DVDs) or other forms It can be stored in an optical storage device, a magnetic cassette. Alternatively, it may be stored in a memory composed of a combination of some or all of them. Also, a plurality of configuration memories may be included.

In addition, the program may be accessed through a communication network composed of a communication network such as the Internet, an intranet, a local area network (LAN), a wide LAN (WLAN), or a storage area network (SAN), or a combination thereof. It may be stored in an attachable (storage) storage device (access). Such a storage device can access a device performing an embodiment of the present disclosure through an external port. Also, a separate storage device on the communication network may access a device performing an embodiment of the present disclosure.

In the specific embodiments of the present disclosure described above, elements included in the present disclosure are expressed in singular or plural according to the specific embodiments presented. However, the singular or plural expressions are appropriately selected for the situation presented for convenience of explanation, and the present disclosure is not limited to the singular or plural components, and even the components expressed in plural are composed of singular or Even the expressed components can be composed of a plurality.

On the other hand, the embodiments of the present invention disclosed in this specification and the drawings are merely to provide a specific example to easily explain the technical contents of the present invention and to understand the present invention, and are not intended to limit the scope of the present invention. That is, it is obvious to those having ordinary knowledge in the technical field to which the present invention pertains that other modified examples based on the technical idea of the present invention can be implemented. In addition, each embodiment can be operated in combination with each other as necessary. For example, the parts of the first embodiment, the second embodiment, and the third embodiment of the present invention may be combined with each other to operate the base station and the terminal. Also, although the embodiments have been presented based on the NR system, other modified examples based on the technical idea of the embodiment may be implemented in other systems such as an FDD or TDD LTE system.

In addition, in the specification and drawings, preferred embodiments of the present invention have been disclosed, and although specific terms have been used, they are merely used in a general sense to easily describe the technical contents of the present invention and to help understand the invention. It is not intended to limit the scope of the invention. It is obvious to those skilled in the art to which the present invention pertains that other modifications based on the technical spirit of the present invention can be implemented in addition to the embodiments disclosed herein.

Claims (20)

In a method of transmitting a HARQ-ACK to a base station in a wireless communication system,
Receiving a plurality of PDSCHs from the base station;
Determining HARQ-ACK codebook information for the plurality of PDSCHs based on HARQ-ACK timing information; And
And transmitting a plurality of HARQ-ACKs for the plurality of PDSCHs to the base station through one slot, based on the determined HARQ-ACK codebook information.
Way.
According to claim 1,
Determining the HARQ-ACK codebook information,
And determining the HARQ-ACK codebook information based on the maximum number of PDSCHs that can be scheduled in one slot and the processing time of the terminal,
Way.
According to claim 2,
Determining the HARQ-ACK codebook information,
Based on the time resource of the PUCCH to which each of the plurality of HARQ-ACKs will be transmitted and the processing time of the terminal, the HARQ-ACK information for the PDSCH whose processing is not completed is indicated to be reported to the base station through NACK. Further comprising the step of determining,
Way.
According to claim 2,
Determining the HARQ-ACK codebook information,
The maximum number of PDSCHs that can be scheduled for each of the plurality of PUCCHs is determined by the size of the HARQ-ACK codebook information, based on the time resource of the PUCCH to which each of the plurality of HARQ-ACKs will be transmitted and the processing time of the terminal. Further comprising the steps of,
Way.
According to claim 1,
Determining the HARQ-ACK codebook information,
And determining the HARQ-ACK codebook information based on configuration information of a PUCCH resource allocated to transmit each of the plurality of HARQ-ACKs,
The configuration information includes the HARQ-ACK timing information and a symbol index that may include at least one of the plurality of PDSCHs,
Way.
According to claim 1,
Determining the HARQ-ACK codebook information,
And determining the HARQ-ACK codebook information based on configuration information of a PUCCH resource allocated to transmit each of the plurality of HARQ-ACKs and processing time of the terminal,
The setting information includes start and end symbol information of the PUCCH resource,
Way.
According to claim 1,
Determining the HARQ-ACK codebook information,
And determining a size of the HARQ-ACK codebook information based on a cumulative value of DAI included in DCI scheduling each of the plurality of PDSCHs.
The cumulative value of the DAI is determined for each DAI group,
Way.
The method of claim 7,
Determining the HARQ-ACK codebook information,
A plurality of DCIs selecting the same PUCCH resource indicator further comprises the step of being set as one DAI group,
Way.
The method of claim 7,
Determining the HARQ-ACK codebook,
The plurality of DCIs, each of which selects a plurality of PUCCH resource indicators having the same time domain resource, further includes setting as one DAI group.
Way.
The method of claim 7,
Determining the HARQ-ACK codebook,
Further comprising the step of determining a plurality of DCI each of a plurality of PUCCH resource indicator having a time domain resource that overlaps a section as one DAI group,
Way.
The method of claim 7,
Determining the HARQ-ACK codebook information,
When there are multiple PUCCH resource sets including a plurality of PUCCH resources,
The DCI further comprises the step of being configured to include a PUCCH resource set indicator,
Way.
The method of claim 7,
Determining the HARQ-ACK codebook information,
When there are multiple PUCCH resource sets including a plurality of PUCCH resources,
Further comprising the step of setting to include one PDCCH resource set information for each of the plurality of PUCCH resource,
Way.
The method of claim 7,
Determining the HARQ-ACK codebook information,
When there are multiple PUCCH resource sets including a plurality of PUCCH resources,
Further comprising the step of receiving the PUCCH resource set through the upper signaling,
Way.
According to claim 1,
Determining the HARQ-ACK codebook,
Distinguishing the type of service that the terminal can support; And
Determining whether to apply at least one HARQ-ACK codebook among HARQ-ACK codebooks and dynamic HARQ-ACK codebooks based on preset upper signaling, according to the type of the divided service,
Way.
In the method of operating the base station for the HARQ-ACK transmission of the terminal in the wireless communication system,
Transmitting a plurality of PDSCHs to the terminal; And
Based on the HARQ-ACK codebook information determined from the terminal, comprising receiving a plurality of HARQ-ACK for the plurality of PDSCH from the terminal through one slot,
Way.
The method of claim 15,
HARQ-ACK codebook information determined from the terminal,
The size of the HARQ-ACK codebook information is determined based on the accumulated value of DAI included in DCI scheduling each of the plurality of PDSCHs,
The cumulative value of the DAI is determined for each DAI group,
Way.
The method of claim 16,
Further comprising the step of setting a plurality of DCI selected the same PUCCH resource indicator as one DAI group,
Way.
The method of claim 16,
Further comprising the step of setting a plurality of DCI to select a plurality of PUCCH resource indicators having the same time domain resource as one DAI group,
Way.
In a terminal for transmitting HARQ-ACK to a base station in a wireless communication system,
Transceiver;
A memory for storing programs; And
By executing the program, a plurality of PDSCHs are received from the base station, and HARQ-ACK codebook information for the plurality of PDSCHs is determined based on HARQ-ACK timing information, and based on the determined HARQ-ACK codebook information. , A processor for transmitting a plurality of HARQ-ACK for the plurality of PDSCH to the base station through one slot,
Terminal.
In the base station for the HARQ-ACK transmission of the terminal in the wireless communication system,
Transceiver;
A memory for storing programs; And
By executing the program, a plurality of PDSCHs are transmitted to the terminal, and a plurality of HARQ-ACKs for the plurality of PDSCHs are received from the terminal through one slot based on the HARQ-ACK codebook information determined from the terminal. Comprising a processor,
Base station.

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