Method and apparatus in wireless communication system

Abstract

The present disclosure relates to a method and apparatus in a wireless communication system. The method comprises: receiving, from a base station, a radio resource control (RRC) message including time division duplex (TDD) configuration information; receiving a first semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) from the base station; identifying a first time slot of a first physical uplink control channel (PUCCH) having a first hybrid automatic repeat request acknowledgement (HARQ-ACK) information bit associated with the first SPS PDSCH; identifying an earliest second time slot of a second PUCCH in a case where a symbol associated with the first PUCCH in the first time slot is indicated as a downlink based on the TDD configuration message; and transmitting a second PUCCH having a second HARQ-ACK information bit to the base station in an earliest second time slot, in which the HARQ-ACK information bit of the first SPS PDSCH is not included in the second HARQ-ACK information bit when the first SPS PDSCH and the second SPS PDSCH having the same HARQ process ID are received before the second PUCCH is transmitted.

Description

[0001] This application is a divisional application of the invention patent application with the application date of December 21, 2020, the application number of 202080088699.5, and the invention title of "Methods and Apparatuses for Periodically Transmitting and Receiving Data in a Wireless Communication System". Technical Field

[0002] The present disclosure relates to a method for license-free data transmission in a wireless communication system. More specifically, the present disclosure relates to a method for downlink license-free data transmission. Background Art

[0003] In order to meet the demand for wireless data traffic since the deployment of 4G communication systems, efforts have been made to develop improved 5G or pre-5G communication systems. Therefore, 5G or pre-5G communication systems are also referred to as "beyond 4G network" communication systems or "post-LTE" systems.

[0004] 5G communication systems are considered to be implemented in higher frequency (mmWave) bands (e.g., 60 GHz band) to achieve higher data rates. In order to reduce the propagation loss of radio waves in higher frequency bands and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technologies have been discussed in 5G communication systems.

[0005] In addition, in 5G communication systems, system network improvements are being developed based on advanced small cells, cloud radio access network (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, coordinated multi-point (CoMP), receiver interference cancellation, etc.

[0006] In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superimposed coding (SWSC) as advanced coding modulation (ACM) technologies, and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as advanced access technologies have also been developed.

[0007] The Internet is a human - centered connection network where humans generate and consume information, and is now evolving towards the Internet of Things (IoT), in which distributed entities such as objects exchange and process information without human intervention. The Internet of Everything (IoE) has emerged by combining IoT technologies and big data processing technologies through connection to cloud servers. With the implementation of IoT, the demand for technical elements such as "sensing technology", "wired / wireless communication and network infrastructure", "service interface technology", and "security technology" has arisen, and technologies such as sensor networks, machine - to - machine (M2M) communication, and machine - type communication (MTC) have also been studied. Such an IoT environment can provide intelligent Internet technology services, which create new value for human life by collecting and analyzing data generated between connected objects. Through the integration and combination of existing information technology (IT) and various industry applications, IoT can be applied to various fields including smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, health care, smart home appliances, and advanced medical services.

[0008] In response, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, machine - type communication (MTC), and machine - to - machine (M2M) communication can be implemented through beamforming, MIMO, and array antennas. The application of Cloud Radio Access Network (Cloud RAN), which is the big data processing technology described above, can also be considered an example of the convergence of 5G and IoT technologies.

[0009] To provide various services, 5G communication systems have been developed, and methods for efficiently providing services according to the provision of various services are required. Therefore, research on license - free communication is being actively carried out. Summary of the Invention

[0010] Technical Problem

[0011] This disclosure describes embodiments for effectively using radio resources and performing license - free data transmission and reception. Specifically, a downlink license - free data transmission and reception method and an uplink license - free data transmission and reception method are described.

[0012] Solution

[0013] To solve this problem, a method performed by a terminal in a wireless communication system according to an embodiment of the present invention includes: receiving, from a base station, a radio resource control (RRC) message including time division duplex (TDD) configuration information; receiving, from the base station, a first semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH); identifying a first time slot of a first physical uplink control channel (PUCCH) having first hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits associated with the first SPS PDSCH; identifying an earliest second time slot of a second PUCCH when a symbol associated with the first PUCCH in the first time slot is indicated as a downlink based on the TDD configuration message; and transmitting, to the base station, a second PUCCH having second HARQ-ACK information bits in the earliest second time slot, wherein, when the first SPS PDSCH and the second SPS PDSCH having the same HARQ process ID are received before transmitting the second PUCCH, the HARQ-ACK information bits of the first SPS PDSCH are not included in the second HARQ-ACK information bits.

[0014] A method performed by a base station in a wireless communication system according to another embodiment of the present invention includes: transmitting, to a terminal, a radio resource control (RRC) message including time division duplex (TDD) configuration information; transmitting, to the terminal, a first semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH); identifying a first time slot of a first physical uplink control channel (PUCCH) having first hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits associated with the first SPS PDSCH; identifying an earliest second time slot of a second PUCCH when a symbol associated with the first PUCCH in the first time slot is indicated as a downlink based on the TDD configuration message; and receiving, from the terminal, a second PUCCH having second HARQ-ACK information bits in the earliest second time slot, wherein, when the first SPS PDSCH and the second SPS PDSCH having the same HARQ process ID are transmitted before receiving the second PUCCH, the HARQ-ACK information bits of the first SPS PDSCH are not included in the second HARQ-ACK information bits.

[0015] A terminal in a wireless communication system according to another embodiment of the present invention includes: a transceiver configured to transmit and receive signals; and a processor operably coupled to the transceiver, wherein the processor is configured to: receive a radio resource control (RRC) message including time division duplex (TDD) configuration information from a base station, receive a first semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) from the base station, identify a first time slot of a first physical uplink control channel (PUCCH) having first hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits associated with the first SPS PDSCH, identify an earliest second time slot of a second PUCCH when a symbol associated with the first PUCCH in the first time slot is indicated as a downlink based on the TDD configuration message, and transmit a second PUCCH having second HARQ-ACK information bits to the base station in the earliest second time slot, wherein the HARQ-ACK information bits of the first SPS PDSCH are not included in the second HARQ-ACK information bits when the first SPS PDSCH and the second SPS PDSCH having the same HARQ process ID are received before transmitting the second PUCCH.

[0016] A base station in a wireless communication system according to another embodiment of the present invention includes: a transceiver configured to transmit and receive signals; and a processor operably coupled to the transceiver, wherein the processor is configured to: transmit a radio resource control (RRC) message including time division duplex (TDD) configuration information to a terminal, transmit a first semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) to the terminal, identify a first time slot of a first physical uplink control channel (PUCCH) having first hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits associated with the first SPS PDSCH, identify an earliest second time slot of a second PUCCH when a symbol associated with the first PUCCH in the first time slot is indicated as a downlink based on the TDD configuration message, and receive a second PUCCH having second HARQ-ACK information bits from the terminal in the earliest second time slot, wherein the HARQ-ACK information bits of the first SPS PDSCH are not included in the second HARQ-ACK information bits when the first SPS PDSCH and the second SPS PDSCH having the same HARQ process ID are transmitted before receiving the second PUCCH.

[0017] A method performed by a UE in a wireless communication system according to another embodiment of the present invention includes: receiving a higher layer signal from a BS that includes information for a first semi-persistent scheduling (SPS) configuration; receiving downlink control information (DCI) from the BS for activating the first SPS configuration; receiving first SPS data related to the first SPS configuration from the BS at two or more different time points based on the information for the first SPS configuration and the DCI; and transmitting multiple hybrid automatic repeat request acknowledgement (HARQ-ACK) messages for the first SPS data from the BS through one physical uplink control channel (PUCCH), wherein the two or more different time points are determined based on the information for the first SPS configuration, and the multiple HARQ-ACK messages are transmitted at an uplink transmission time point identified based on the higher layer signal and the DCI.

[0018] The information for the first SPS configuration may include at least one of a transmission period of the first SPS data, a HARQ process number, and resource information for the PUCCH, and the DCI may include a timing indicator that indicates a transmission period of the HARQ-ACK information for the first SPS data related to the first SPS configuration.

[0019] The multiple HARQ-ACK messages may include at least one HARQ-ACK message that cannot be transmitted at the transmission time point indicated by the timing indicator.

[0020] The higher layer signal may further include information for a second SPS configuration, the multiple HARQ-ACK messages may include HARQ-ACK information for at least one second SPS data related to the second SPS configuration, and it is determined that HARQ process IDs for the HARQ-ACK information included in the multiple HARQ-ACK messages do not overlap with each other based on the HARQ process number.

[0021] A UE in a wireless communication system according to another embodiment of the present invention includes: a transceiver configured to transmit and receive signals; and a controller connected to the transceiver, wherein the controller is configured to receive a higher layer signal including information for a first semi-persistent scheduling (SPS) configuration from a BS; receive downlink control information (DCI) for activating the first SPS configuration from the BS; receive first SPS data related to the first SPS configuration from the BS at two or more different time points based on the information for the first SPS configuration and the DCI; and transmit multiple hybrid automatic repeat request acknowledgement (HARQ-ACK) messages for the first SPS data to the BS via one physical uplink control channel (PUCCH), and determine two or more different time points based on the information for the first SPS configuration, and transmit multiple HARQ-ACK messages at the uplink transmission time points identified based on the higher layer signal and the DCI.

[0022] A method performed by a BS in a wireless communication system according to another embodiment of the present invention includes: transmitting a higher layer signal including information for a first semi-persistent scheduling (SPS) configuration to a UE; transmitting downlink control information (DCI) for activating the first SPS configuration to the UE; transmitting first SPS data related to the first SPS configuration to the UE at two or more different time points based on the information for the first SPS configuration and the DCI; and receiving multiple hybrid automatic repeat request acknowledgement (HARQ-ACK) messages for the first SPS data from the UE via one physical uplink control channel (PUCCH), and determining two or more different time points based on the information for the first SPS configuration, and receiving multiple HARQ-ACK messages at the uplink transmission time points identified based on the higher layer signal and the DCI.

[0023] A BS in a wireless communication system according to another embodiment of the present invention includes: a transceiver configured to transmit and receive signals; and a controller connected to the transceiver, wherein the controller is configured to transmit a higher layer signal including information for a first semi-persistent scheduling (SPS) configuration to a UE; transmit downlink control information (DCI) for activating the first SPS configuration to the UE; transmit first SPS data related to the first SPS configuration to the UE at two or more different time points based on the information for the first SPS configuration and the DCI; and receive multiple hybrid automatic repeat request acknowledgement (HARQ-ACK) messages for the first SPS data from the UE via one physical uplink control channel (PUCCH), and determine two or more different time points based on the information for the first SPS configuration, and receive multiple HARQ-ACK messages at the uplink transmission time points identified based on the higher layer signal and the DCI.

[0024] Advantageous Effects of the Invention

[0025] According to the disclosed embodiments, radio resources can be effectively used, and various services can be effectively provided to users according to priorities. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Shows a transmission structure in the time-frequency domain as a radio resource region of a 5G or NR system according to an embodiment of the present invention.

[0027] Figure 2 Shows an example of allocating data for eMBB, URLLC, and mMTC in a time-frequency resource region in a 5G or NR system according to an embodiment of the present invention.

[0028] Figure 3 Shows a grant-free transmission / reception operation according to an embodiment of the present disclosure.

[0029] Figure 4 Shows a semi-static hybrid automatic repeat request (HARQ)-acknowledgment (ACK) codebook configuration method in an NR system.

[0030] Figure 5 Shows a dynamic HARQ-ACK codebook configuration method in an NR system.

[0031] Figure 6 Shows a process of transmitting HARQ-ACK for downlink (DL) semi-persistent scheduling (SPS).

[0032] Figure 7 Is a block diagram showing a process of HARQ-ACK information based on a semi-static HARQ-ACK codebook in which a UE transmits downlink control information (DCI) for indicating deactivation of an SPS physical downlink shared channel (PDSCH).

[0033] Figure 8 Is a block diagram showing a method by which a UE determines a dynamic HARQ-ACK codebook for SPS PDSCH reception.

[0034] Figure 9 Is a block diagram showing a method by which a UE transmits HARQ-ACK information according to a DL SPS transmission period.

[0035] Figure 10 Is a block diagram showing UE operations for dynamically changing a DL SPS transmission period.

[0036] Figure 11Illustrates a method by which a UE transmits HARQ-ACK information for SPS release when two or more DL SPSs are activated.

[0037] Figure 12 Illustrates grant-free operation when a UE is connected to two or more transmission reception points (TRPs).

[0038] Figure 13 Illustrates the DL SRS reception operation of a UE when two or more DL SPSs overlap in time.

[0039] Figure 14 Is a block diagram illustrating the reception operation of a UE when two or more DL SPSs overlap in time.

[0040] Figure 15 Illustrates HARQ-ACK transmission / reception for DL SPS reception according to an embodiment.

[0041] Figure 16 Illustrates the transmission of HARQ-ACK information for multiple DL SPSs according to an embodiment.

[0042] Figure 17 Illustrates the transmission of HARQ-ACK information for DL SPSs considering the HARQ process ID according to an embodiment.

[0043] Figure 18 Is a block diagram illustrating the reporting of HARQ-ACK information transmitted / received by a UE according to DL SPS.

[0044] Figure 19 Is a block diagram illustrating the structure of a UE capable of implementing an embodiment of the present disclosure.

[0045] Figure 20 Is a block diagram illustrating the structure of a BS capable of implementing an embodiment of the present disclosure.

[0046] Figure 21 Illustrates HARQ-ACK transmission / reception for DL SPS reception according to an embodiment.

[0047] Figure 22 Is a flowchart illustrating the operation of a UE according to an embodiment.

[0048] Figure 23 Is a flowchart illustrating the operation of a BS according to an embodiment. Detailed Description of the Embodiments

[0049] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0050] When describing embodiments, descriptions related to technical content that is well known in the art and not directly associated with the present disclosure will be omitted. Such omission of unnecessary descriptions is to prevent obscuring the main idea of the disclosure and to more clearly convey the main idea.

[0051] For the same reason, in the drawings, some elements may be exaggerated, omitted, or shown schematically. In addition, the dimensions of each element may not fully reflect the actual dimensions. In the drawings, the same or corresponding elements are provided with the same reference numerals.

[0052] Advantages and features of the present disclosure and methods for realizing them will be apparent by referring to the embodiments described in detail below in conjunction with the drawings. However, the present disclosure is not limited to the embodiments set forth below, but may be implemented in various different forms. The following embodiments are provided only to fully disclose the present disclosure and to inform those skilled in the art of the scope of the present disclosure, and the present disclosure is defined only by the scope of the appended claims. Throughout the specification, the same or similar reference numerals designate the same or similar elements.

[0053] Here, it can be understood that each block in the flowchart illustration, as well as combinations of blocks in the flowchart illustration, can be implemented by computer program instructions. These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine, such that the instructions executed via the processor of the computer or other programmable data processing device create means for implementing the functions specified in one or more blocks of the flowchart. These computer program instructions can also be stored in a computer-usable or computer-readable memory, and the instructions can direct the computer or other programmable data processing device to operate in a specific manner, such that the instructions stored in the computer-usable or computer-readable memory produce a manufacture including instruction means for implementing the functions specified in the flowchart block diagram. The computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operation steps to be executed on the computer or other programmable device to produce a computer-implemented process, such that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more blocks of the flowchart.

[0054] In addition, each block in the flowchart illustration may represent a module, a segment, or a portion of code, and each block includes one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions in the blocks may not occur in sequence. For example, depending on the functions involved, two consecutive blocks shown may actually be executed substantially simultaneously or sometimes may be executed in the reverse order.

[0055] As used herein, the term "unit" refers to a software element or a hardware element (such as a Field Programmable Gate Array (FPGA) or an Application Specific Integrated Circuit (ASIC)) that performs a predetermined function. However, the "unit" is not always limited to the meaning of software or hardware. A "unit" can be constructed to be stored in an addressable storage medium or to be executed by one or more processors. Thus, for example, a "unit" can include software elements, object-oriented software elements, class elements or task elements, processes, functions, attributes, programs, subroutines, program code segments, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and parameters. The elements and functions provided by a "unit" can be combined into a smaller number of elements or "units", or can be divided into a larger number of elements or "units". Moreover, elements and units can be implemented to reproduce one or more CPUs or secure multimedia cards in a device. In addition, the "unit" in an embodiment can include one or more processors.

[0056] Wireless communication systems have evolved from wireless communication systems that provide voice-based services to broadband wireless communication systems that provide high-speed and high-quality packet data services, such as High-Speed Packet Access (HSPA) of the 3rd Generation Partnership Project (3GPP), Long Term Evolution (LTE or Evolved Universal Terrestrial Radio Access (E-UTRA)), High Rate Packet Data (HRPD) and Ultra Mobile Broadband (UMB) of 3GPP2, and communication standards such as 802.16e of the Institute of Electrical and Electronics Engineers (IEEE). Communication standards for 5G or New Radio (NR) are being developed as 5G wireless communication systems.

[0057] In a 5G or NR system, which is a representative example of a broadband wireless communication system, an Orthogonal Frequency Division Multiplexing (OFDM) scheme is adopted in both the downlink (DL) and the uplink. More specifically, a Cyclic Prefix OFDM (CP-OFDM) scheme is adopted in the downlink, and in the uplink, in addition to the CP-OFDM scheme, a Discrete Fourier Transform Spread OFDM (DFT-S-OFDM) scheme is also adopted. The uplink refers to the radio link through which the UE sends data or control signals to the BS, and the downlink refers to the radio link through which the BS sends data or control signals to the UE. In such a multi-access scheme, time-frequency resources for carrying data or control information are allocated and operated in a way that prevents resource overlap, that is, orthogonality is established among users so as to identify the data or control information of each user.

[0058] The 5G or NR system adopts a Hybrid Automatic Repeat reQuest (HARQ) scheme, in which when a decoding failure occurs in the initial transmission, the physical layer retransmits the corresponding data. In the HARQ scheme, when the receiver fails to accurately decode the data, the receiver sends a message (Negative ACKnowledgement: NACK) notifying the transmitter of the decoding failure, so that the transmitter can retransmit the corresponding data on the physical layer. The receiver can combine the data retransmitted by the transmitter and the previous data that failed to be decoded, thereby improving the data reception performance. In addition, when the receiver accurately decodes the data, the receiver sends a message (ACKnowledgement: ACK) notifying the transmitter of the decoding success, so that the transmitter can send new data.

[0059] Meanwhile, the new radio access technology (NR) system for new 5G communications is designed to freely multiplex various services in time and frequency resources. Accordingly, waveforms, parameter sets, and reference signals can be dynamically or freely allocated according to the needs of the corresponding services. At the same time, in the 5G or NR system, the supported service types can be classified into categories such as enhanced mobile broadband (eMBB), massive machine type communication (mMTC), ultra-reliable low-latency communication (URLLC), etc. eMBB is a service for high-capacity data high-speed transmission, mMTC is a service for UE power minimization and multiple UE access, and URLLC is a service for high reliability and low latency. Different requirements can be applied according to the service type applied to the UE.

[0060] In the present disclosure, terms are defined in consideration of their functions and can vary depending on the intention or convention of the user or operator. Therefore, the definition of terms should be made based on the content of the entire specification. Hereinafter, a BS is an entity that allocates resources to a UE and can 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 BS controller, and a node on the network. A UE can include a user equipment (UE), a mobile station (MT), a cellular phone, a smart belt, a computer, or a multimedia system capable of performing communication functions. Hereinafter, the present disclosure describes the NR system as an example, but is not limited thereto. Embodiments of the present disclosure can be applied to various communication systems having a similar technical background or channel form. In addition, based on the determination of those of ordinary skill in the art, embodiments of the present disclosure can also be applied to other communication systems with some modifications without departing from the scope of the present disclosure.

[0061] In the present disclosure, the traditional terms "physical channel" and "signal" can be used interchangeably with "data" or "control signal". For example, the Physical Downlink Shared Channel (PDSCH) is a physical channel through which data is transmitted, but the PDSCH can be data in the present disclosure. That is, the transmission and reception of the PDSCH can be understood as the transmission and reception of data.

[0062] In the present disclosure, higher signaling (or used interchangeably with higher signal, higher layer signal, and higher layer signaling) is a method by which the BS transmits a signal to the UE through a downlink data channel of the physical layer, or by which the UE transmits a signal to the BS through an uplink data channel of the physical layer, and can be referred to as radio resource control (RRC) signaling or medium access control (MAC) control element (CE).

[0063] According to recent research on 5G communication systems, various schemes for scheduling communication with the UE have been discussed. Therefore, an efficient scheduling and data transmission / reception method considering the characteristics of 5G communication systems is required. Thus, in a communication system, a method for providing each service within the same time interval according to the characteristics of the corresponding service to provide multiple services to a user and an apparatus using the method are needed.

[0064] The UE should receive separate control information from the BS in order to transmit or receive data from / to the BS. However, in the case of traffic generated periodically or service types that require low latency and / or high reliability, it is possible to transmit or receive data without separate control information. Such a transmission method is called a configuration-based grant (or can be used interchangeably with grant-free or configured scheduling) data transmission method. The method of receiving or transmitting data after configuring data transmission resources through control information and receiving relevant information can be a first signal transmission / reception type, and the method of transmitting or receiving data based on pre-configured information without any control information can be a second signal transmission / reception type. For the second signal transmission / reception type, there are pre-configured resource regions periodically, and these regions have uplink type 1 grant (UL type 1 grant) and uplink type 2 grant (UL type 2 grant). The uplink type 1 grant is a method including a configuration of only higher signals, and the uplink type 2 grant is a method including a combination of higher signals and L1 signals (i.e., downlink control information (DCI)) (or semi-persistent scheduling (SPS)). In the case of UL type 2 grant (or SPS), some information is determined by higher signals, and whether to actually transmit data is determined by L1 signals. L1 signals can be generally divided into a signal indicating activation of resources through higher configuration and a signal indicating release of activated resources.

[0065] The present disclosure includes: a method for determining a semi-static HARQ-ACK codebook and a dynamic HARQ-ACK codebook and a method for transmitting HARQ-ACK information when the DL SPS transmission period is aperiodic or less than one time slot.

[0066] Figure 1Shows the transmission structure of the time-frequency domain as a radio resource region in a 5G or NR system.

[0067] Referring to Figure 1 , in the radio resource region, the horizontal axis indicates the time domain, and the vertical axis indicates the frequency domain. The smallest transmission unit in the time domain is an OFDM symbol, and N symb OFDM symbols 102 correspond to one time slot 106. The length of a subframe can be defined as 1.0 ms, and a radio frame 114 can be defined as 10 ms. In the frequency domain, the smallest transmission unit is a subcarrier, and the bandwidth of the entire system transmission band can include a total of N BW subcarriers 104. However, such detailed values can be variably applied according to the system.

[0068] The basic unit of the time-frequency resource region is a resource element (RE) 112, which can be indicated by an OFDM symbol index and a subcarrier index. A resource block (RB) 108 can be defined as N RB consecutive subcarriers 110 in the frequency domain.

[0069] Generally, the smallest transmission unit of data is an RB. In a 5G or NR system, generally, N symb = 14, N RB = 12, N BW can be proportional to the bandwidth of the system transmission band. The data rate increases proportionally with the number of RBs scheduled to the UE. In the case of an FDD system in which the downlink and uplink are divided and operated according to the frequency in a 5G or NR system, the downlink transmission bandwidth and the uplink transmission bandwidth can be different. The channel bandwidth refers to the RF bandwidth corresponding to the system transmission bandwidth. The following [Table 1] shows the correspondence between the system transmission bandwidth and the channel bandwidth defined in the LTE system, which is the fourth-generation wireless communication before the 5G or NR system. For example, an LTE system with a 10 MHz channel bandwidth has a transmission bandwidth of 50 RBs.

[0070] [Table 1]

[0071]

[0072] In a 5G or NR system, a channel bandwidth wider than that of the LTE shown in [Table 1] can be adopted. [Table 2] shows the correspondence between the system transmission bandwidth, the channel bandwidth, and the subcarrier spacing (SCS) in a 5G or NR system.

[0073] [Table 2]

[0074]

[0075] In a 5G or NR system, scheduling information for downlink data or uplink data can be sent from a BS to a UE via downlink control information (DCI). DCI is defined in various formats. Each format can indicate whether the DCI is scheduling information for uplink data (UL grant) or scheduling information for downlink data (DL grant), whether the DCI is a compact DCI with small-sized control information, whether the DCI applies spatial multiplexing using multiple antennas, and whether the DCI is a DCI for controlling power. For example, DCI format 1_1 as scheduling control information for downlink data (DL grant) can include one of the following information.

[0076] - Carrier indicator: Indicates the frequency carrier through which the transmission is performed.

[0077] - DCI format indicator: An indicator used to identify whether the corresponding DCI is for downlink or uplink.

[0078] - Bandwidth part (hereinafter referred to as BWP) indicator: Indicates the BWP in which the transmission is performed.

[0079] - Frequency domain resource allocation: Indicates the RBs allocated to data transmission in the frequency domain. The represented resources are determined according to the system bandwidth and resource allocation type.

[0080] - Time domain resource allocation: Indicates the time slots and OFDM symbols of the channel related to data transmission.

[0081] - VRB to PRB mapping: Indicates the mapping scheme between virtual RB (hereinafter referred to as VRB) index and physical RB (hereinafter referred to as PRB) index.

[0082] - Modulation and coding scheme (MCS): Indicates the modulation scheme and coding rate for data transmission; that is, it can indicate the coding rate value for notifying the transport block size (TB) and channel coding information, and information indicating quadrature phase shift keying (QPSK), 16-quadrature amplitude modulation (QAM), 64QAM, or 256QAM.

[0083] - Codeblock group (CBG) transmission information: Indicates the information on which the CBG is transmitted when CBG retransmission is configured.

[0084] - HARQ process number: Indicates the process number of HARQ.

[0085] - New data indicator: Indicates HARQ initial transmission or HARQ retransmission.

[0086] - Redundancy version: Indicates the redundancy version of HARQ.

[0087] - Physical Uplink Control Channel (PUCCH) Resource Indicator: Indicates the PUCCH resource for transmitting ACK / NACK information for downlink data.

[0088] - PDSCH-to-HARQ Feedback Timing Indicator: Indicates the time slot in which the ACK / NACK information for the transmitted downlink data is transmitted.

[0089] - Transmission Power Control (TPC) Command for PUCCH: Indicates the transmission power control command for the PUCCH which is an uplink control channel.

[0090] In the case of Physical Uplink Shared Channel (PUSCH) transmission, the time domain resource allocation can be conveyed by information regarding the time slot in which the PUSCH is transmitted, the starting symbol position S in the corresponding time slot, and the number L of OFDM symbols to which the PUSCH is mapped. S can be the relative position from the start of the time slot, L can be the number of consecutive OFDM symbols, and S and L can be determined based on the Start and Length Indicator Value (SLIV) defined as follows.

[0091]

[0092] In a 5G or NR system, generally, a table including information regarding SLIV values, PUSCH mapping types, and the time slots in which PUSCH is transmitted in a row can be configured through RRC configuration. Thereafter, in the time domain resource allocation of DCI, the BS can transmit information regarding SLIV values, PUSCH mapping types, and the time slots for transmitting PUSCH by indicating the index value in the configured table. Such a method can be applied to PDSCH.

[0093] Specifically, when the BS indicates the time resource allocation field index m included in the DCI for scheduling PDSCH to the UE, it can notify the combination of the DMRS type A position information corresponding to m + 1, PDSCH mapping type information, time slot index K0, data resource start symbol S, and the data resource allocation length L in the table indicating the time domain resource allocation information. For example, the following [Table 3] is a table including PDSCH time domain resource allocation information based on a normal cyclic prefix.

[0094] [Table 3]

[0095]

[0096] In [Table 3], dmrs-typeA-Position is a field for notifying the symbol position where DMRS is transmitted in a time slot indicated by a system information block (SIB) which is one of the UE common control information. The available values for the corresponding field can include 2 or 3. When the total number of symbols included in a time slot is 14 and the first symbol index is 0, 2 refers to the third symbol and 3 refers to the fourth symbol. In [Table 3], the PDSCH mapping type is information for notifying the position of DMRS in the scheduled data resource region. When the PDSCH mapping type is A, DMRS can always be transmitted and received at the symbol position determined by dmrs-typeA-Position, regardless of the allocated data time domain resources. When the PDSCH mapping type is B, DMRS can always be transmitted and received in the first symbol of the allocated data time domain resources. In other words, the PDSCH mapping type B may not use the dmrs-typeA-Position information.

[0097] In [Table 1], K0 represents the offset between the time slot index to which the physical downlink control channel (PDCCH) for transmitting DCI belongs and the time slot index to which the PDSCH scheduled by the corresponding DCI or PUSCH belongs. For example, when the time slot index of the PDCCH is n, the time slot index of the PDSCH scheduled by the DCI or PUSCH is n + K0. In [Table 3], S represents the start symbol index of the data time domain resources in a time slot. Based on the normal cyclic prefix, the range of available S values is from 0 to 13. In [Table 1], L represents the data time domain resource interval length in a time slot. The range of available L values is from 1 to 14.

[0098] In the 5G or NR system, type A and type B are defined as PDSCH mapping types. In the PDSCH mapping type A, the first OFDM symbol of the DMRS OFDM symbols can be located in the second or third OFDM symbol of the time slot. In the PUSCH mapping type B, the first OFDM symbol of the DMSR OFDM symbols can be located in the first OFDM symbol of the time domain resources allocated by the PUSCH transmission. The method for allocating the PUSCH time domain resources is equally applicable to the PDSCH time domain resource allocation.

[0099] DCI can be transmitted through the physical downlink control channel (which can be used interchangeably with control information) which is a downlink physical control channel via channel coding and modulation processing. Generally, DCI is independently scrambled for each UE by a specific radio network temporary identifier (RNTI) (or UE identifier), a cyclic redundancy check (CRC) is added, and channel coding is performed, so that each independent PDCCH is configured and transmitted. The PDCCH is mapped to a control resource set (CORESET) configured in the UE and transmitted.

[0100] Downlink data can be sent through the Physical Downlink Shared Channel (PDSCH), which is a physical channel for sending downlink data. The PDSCH can be sent after the control channel transmission interval and can determine detailed mapping positions and scheduling information in the frequency domain such as the modulation scheme based on the DCI transmitted through the PDCCH.

[0101] Via the MCS of the control information included in the DCI, the BS can report the modulation scheme applied to the PDSCH to be transmitted to the UE and the size of the data to be transmitted (transport block size (TB)). In an embodiment, the MCS can be configured by 5 bits or bits greater than or less than 5 bits. The TB corresponds to this size before channel coding for error correction is applied to the data (TB) to be transmitted by the BS.

[0102] In the present disclosure, the transport block (TB) can include a Medium Access Control (MAC) header, MAC CE, one or more MAC service data units, and padding bits. Alternatively, the TB can indicate a unit of data from the MAC layer to the physical layer or a MAC protocol data unit (PDU).

[0103] Modulation schemes supported by 5G or LTE systems include Quadrature Phase Shift Keying (QPSK), 16-Quadrature Amplitude Modulation (16QAM), 64QAM, and 256QAM. The respective modulation orders (Qm) correspond to 2, 4, 6, and 8 respectively. That is, in QPSK modulation, 2 bits can be transmitted per symbol, in 16QAM modulation, 4 bits can be transmitted per OFDM symbol, in 64QAM modulation, 6 bits can be transmitted per symbol, and in 256QAM modulation, 8 bits can be transmitted per symbol.

[0104] When the DCI schedules the PDSCH, HARQ-ACK information indicating whether the PDSCH is successfully decoded or decoded failed is sent from the UE to the BS through the PUCCH. The HARQ-ACK information is transmitted in the time slot indicated by the PDSCH-to-HARQ feedback timing indicator included in the DCI for scheduling the PDSCH, and the value of 1 to 3 bits mapped to the PDSCH-to-HARQ feedback timing indicator is configured by a higher layer signal as shown in [Table 4]. When the PDSCH-to-HARQ feedback timing indicator indicates k, the UE can transmit the HARQ-ACK information in the time slot k time slots after the time slot n from which the PDSCH is transmitted, that is, in time slot n + k.

[0105] [Table 4]

[0106]

[0107] When the DCI format 1_1 for scheduling the PDSCH does not include the PDSCH-to-HARQ feedback timing indicator, the UE may transmit HARQ-ACK information in slot n + k according to the k value configured by higher layer signaling. When transmitting HARQ-ACK information via the PUCCH, the UE may transmit the HARQ-ACK information via the PUCCH resource determined based on the PUCCH resource indicator included in the DCI for scheduling the PDSCH. At this time, the ID of the PUCCH resource mapped to the PUCCH resource indicator may be configured by higher layer signaling.

[0108] Figure 2 An example of allocating data for eMBB, URLLC, and mMTC in the time-frequency resource region in a 5G or NR system is shown.

[0109] Refer to Figure 2 , data for eMBB, URLLC, and mMTC may be allocated to the entire system frequency band 200. When generating and needing to transmit URLLC data 203, 205, and 207 while allocating eMBB data 201 and mMTC data 209 to a specific frequency band and transmitting, the transmitter may clear the part where the eMBB data 201 and mMTC data 209 have been allocated, or transmit the URLLC data 203, 205, and 207 without transmitting data. Among these services, URLLC needs to reduce the latency time, so the URLLC data may be allocated to and transmitted in a part of the resources where eMBB or mMTC data has been allocated. When the URLLC data is additionally allocated to and transmitted in the resources where eMBB data has been allocated, the eMBB data may not be transmitted in the repeated frequency-time resources, and thus, the transmission performance of the eMBB data may be reduced. That is to say, due to the URLLC allocation, the eMBB data transmission may fail.

[0110] Figure 3 An example of grant-free transmission and reception operations is shown.

[0111] The UE has a first signal transmission / reception type for receiving downlink data from the BS according to information configured only by higher signaling, and a second signal transmission / reception type for receiving downlink data according to the transmission configuration information indicated by higher signaling and L1 signaling. This disclosure mainly describes the operation method of the UE of the second signal transmission / reception type. In this disclosure, SPS as the second signal type for receiving downlink data means downlink grant-free PDSCH transmission. In DL SPS, the UE may receive grant-free PDSCH transmission through additional configuration information configured by higher signaling and indicated by DCI.

[0112] DL SPS means Downlink Semi-Persistent Scheduling and is a method by which the BS periodically sends and receives downlink data information to / from the UE based on information configured by higher signaling without specific downlink control information scheduling. It can be applied to VoIP or traffic situations that occur periodically. Alternatively, the resource configuration for DL SPS can be periodic, but the actual generated data can be aperiodic. In this case, the UE does not know whether actual data is generated in the periodically configured resources, and thus can perform the following two types of operations.

[0113] - Method 3-1: The UE sends HARQ-ACK information of an uplink resource region corresponding to the resource region corresponding to the demodulation / decoding result of the received data to the BS

[0114] - Method 3-2: When the UE successfully detects at least one DMRS or data signal in the periodically configured DL SPS resource region, the UE sends HARQ-ACK information of an uplink resource region corresponding to the resource region corresponding to the demodulation / decoding result of the received data to the BS

[0115] - Method 3-3: When the UE succeeds (i.e., ACK) in the demodulation / decoding for the periodically configured DL SPS resource region, the UE sends HARQ-ACK information of an uplink resource region corresponding to the resource region corresponding to the demodulation / decoding result of the received data to the BS

[0116] In Method 3-1, the UE always transmits HARQ-ACK information to the uplink resource region corresponding to the corresponding DL SPS resource region even if the BS does not actually transmit downlink data for the DL SPS resource region. In Method 3-2, if the UE knows whether data is sent / received, the UE can transmit HARQ-ACK information as in the case where the UE continuously detects DMRS or CRC because the UE does not know when the BS will transmit data to the DL-SPS resource region. In Method 3-3, the HARQ-ACK information is transmitted to the uplink resource region corresponding to the corresponding DP SPS resource region only when the UE continuously demodulates / decodes the data.

[0117] In the above method, the UE can always support only one method, or support two or more methods. One of the methods can be selected through the 3GPP standard or a higher signal. For example, for Method 3-1 indicated by a higher signal, the UE can transmit HARQ-ACK information for the corresponding DL SPS based on Method 3-1. Alternatively, one method can be selected according to the higher configuration information of DL SPS. For example, when the transmission period in the higher configuration information of DL SPS is n time slots or longer, the UE can apply Method 3-1, and apply Method 3-3 in the opposite case. In this embodiment, the transmission period is described as an example, but the applied MCS table, DMRS configuration information, or resource configuration information can be fully utilized.

[0118] The UE can receive downlink data in the downlink resource region configured by higher signaling. The downlink resource region configured by higher signaling can be activated or released by L1 signaling.

[0119] Figure 3 Operations for DL SPS are shown. The UE can receive the following DL SPS configuration information through a higher signal.

[0120] - Period: DL SPS transmission period

[0121] - nrofHARQ-Processes: Number of HARQ processes configured for DL SPS

[0122] - n1PUCCH-AN: HARQ resource configuration information for DL SPS

[0123] - mcs-Table: MCS table configuration information applied to DL SPS

[0124] In the present disclosure, all DL SPS configuration information can be configured for each Pcell or each Scell, and all DL SPS configuration information can also be configured for each bandwidth part (BWP). In addition, one or more DL SPSs can be configured for each specific cell or BWP.

[0125] In Figure 3 the UE can determine the grant-free transmission / reception configuration information 300 by receiving a higher signal for DL SPS. In DL SPS, data can be transmitted and received for the resource region 308 configured after the reception of the DCI indicating activation 302, and data can be transmitted and received for the entire resource region 306 before the reception of the corresponding DCI. In addition, for the resource region 310 after the reception of the DCI indicating release 304, the UE cannot receive data.

[0126] The UE can verify the DL SPS allocated PDCCH when all of the following two conditions are satisfied for the activation or release of SPS scheduling.

[0127] - Condition 1: The CRC bits of the DCI format transmitted in the PDCCH are scrambled by the CS-RNTI configured by higher layer signaling

[0128] - Condition 2: The new data indicator (NDI) field of the activated transport block is configured to 0

[0129] When some of the fields included in the DCI format transmitted by the DL SPS allocated PDCCH are the same as the fields shown in [Table 5] or [Table 6], the UE can determine that the information within the DCI format is a valid activation or valid release of DL SPS. For example, when the UE detects a DCI format including the information shown in [Table 5], the UE can determine that DL SPS is activated. In another example, when the UE detects a DCI format including the information shown in [Table 6], the UE can determine that DL SPS is released.

[0130] When some of the fields included in the DCI format transmitted by the DL SPS allocated PDCCH are not the same as the fields shown in [Table 5] (special field configuration information for activating DL SPS) or [Table 6] (special field configuration information for releasing DL SPS), the UE determines that the DCI format is detected by a mismatched CRC.

[0131] [Table 5]

[0132] DCI Format 1_0 DCI Format 1_1 HARQ Process Number Set to all "0" Set to all "0" Redundancy Version Set to "00" For enabled transport block: Set to "00"

[0133] [Table 6]

[0134] DCI Format 1_0 HARQ Process Number Set to all "0" Redundancy Version Set to "00" Modulation and Coding Scheme Set to all "1" Resource Block Allocation Set to all "1"

[0135] When the UE receives a PDSCH without receiving a PDCCH or receives a PDCCH indicating the release of SPS PDSCH, the UE can generate the corresponding HARQ-ACK information bits. In addition, at least in Rel-15 NR, the UE may not be expected to transmit (multiple) HARQ-ACK information for receiving two or more SPS PDSCHs in one PUCCH resource. In other words, at least in Rel-15 NR, the UE can include only the HARQ-ACK information for receiving one SPS PDSCH in one PUCCH resource.

[0136] DL SPS can also be configured in the primary cell (PCell) and the secondary cell (SCell). The parameters that can be configured by DL SPS higher layer signaling are described below.

[0137] - Period: DL SPS transmission period

[0138] - nrofHARQ-processes: Number of HARQ processes that can be configured for DL SPS

[0139] - n1PUCCH-AN: PUCCH HARQ resources for DL SPS, where the BS configures resources through PUCCH format 0 or 1

[0140] The [Table 5] and [Table 6] described above can be fields for configuring only one DL SPS per cell and per BWP. In the case of configuring multiple DL SPSs per cell and per BWP, the DCI fields for activating (or releasing) each DL SPS resource can be different. The present invention provides a method to solve this situation.

[0141] In the present disclosure, not all DCI formats described in [Table 5] and [Table 6] are used to activate or release DLSPS resources. For example, DCI format 1_0 and DCI format 1_1 for scheduling PDSCH can be used to activate DL SPS resources. For example, DCI format 1_0 for scheduling PDSCH can be used to release DL SPS resources.

[0142] Figure 4 Illustrates a semi-static HARQ-ACK codebook configuration method in the NR system.

[0143] When the number of HARQ-ACK PUCCHs that can be transmitted by the UE within one time slot is limited to one, when the UE receives a higher configuration of the semi-static HARQ-ACK codebook, the UE can report HARQ-ACK information for PDSCH reception or SPS PDSCH release through the HARQ-ACK codebook in the time slot indicated by the value of the PDSCH-to-HARQ_feedback timing indicator in DCI format 1_0 or DCI format 1_1. In addition, the UE can report the HARQ-ACK information bit value in the HARQ-ACK codebook in the time slot not indicated by the PDSCH-to-HARQ feedback timing indicator field within DCI format 1_0 or DCI format 1_1 as NACK. If in M for receiving candidate PDSCH A,c In the case where the UE only reports HARQ-ACK information for one SPS PDSCH release or one PDSCH reception, and this report is scheduled by DCI format 1_0 including information indicating 1 in the DAI field of the counter in the Pcell, the UE can determine one HARQ-ACK codebook for the corresponding SPS PDSCH release or the corresponding PDSCH reception.

[0144] In other cases, a method for determining a HARQ-ACK codebook according to the following method may be executed.

[0145] When a set of PDSCH reception candidates in serving cell c is M A,c M can be obtained through the following steps of [Pseudo-code 1]. A,c .

[0146] [Start of Pseudo-code 1]

[0147] - Step 1: Initialize j to 0, initialize MA,c to an empty set. The k for the HARQ-ACK transmission timing index is initialized to 0.

[0148] - Step 2: Configure R as a set of rows in a table including information about the time slot to which the PDSCH is mapped, start symbol information, symbol number or length information. When, according to the configured DL and UL configurations, the mapping information of the available PDSCH indicated by each value of R is configured as a UL symbol, delete the corresponding row from R.

[0149] - Step 3-1: The UE may receive a PDSCH for unicast in a time slot. If R is not an empty set, add a PDSCH to the set of MA,c.

[0150] - Step 3-2: When the UE can receive one or more PDSCHs for unicast in a time slot, count the number of PDSCHs that can be assigned to different symbols in the calculated R, and add the corresponding number to MA,c.

[0151] - Step 4: Increment k by 1 and start again from Step 2.

[0152] [End of Pseudo-code 1]

[0153] In the description of Pseudo-code 1 by the example of Figure 4 , all time slot candidates that can indicate the PDSCH-to-HARQ-ACK timing of time slot #k 408 are considered to perform HARQ-ACK PUCCH transmission in time slot #k 408. In Figure 4In this case, it is assumed that in time slot #k 408, it is possible to perform HARQ-ACK transmission by allowing only the PDSCH-to-HARQ-ACK timing combinations for the PDSCHs scheduled in time slots #n 402, #n+1 404, and #n 406. Considering the time domain resource configuration information of the PDSCHs that can be scheduled in time slots 402, 404, and 406 and the information indicating whether the symbols within the time slot are for downlink or uplink, calculate the maximum number of PDSCHs that can be scheduled for each time slot. For example, when the maximum number of PDSCHs that can be scheduled in time slot 402 is 2, the maximum number of PDSCHs that can be scheduled in time slot 404 is 3, and the maximum number of PDSCHs that can be scheduled in time slot 406 is 2, the maximum number of PDSCHs included in the HARQ-ACK codebook transmitted in time slot 408 is 7. This is called the cardinality of the HARQ-ACK codebook.

[0154] In a specific time slot, step 3-2 is described by the following [Table 7] (Default PDSCH Time Domain Resource Allocation A for Normal CP).

[0155] [Table 7]

[0156]

[0157]

[0158] [Table 7] is a time resource allocation table, where the UE operates in a default manner before receiving the time resource allocation through a separate RRC signal. For reference, the PDSCH time resource allocation value is determined by dmrs-TypeA-Position, which, in addition to indicating the row index value through a separate RRC, also serves as a UE common RRC signal. In the above [Table 7], for ease of description, an encoding column and an order column are added separately, which may not actually exist. The end column means the end symbol of the scheduled PDSCH, and the order column represents the code position value within a specific codebook in the semi-static HARQ-ACK codebook. Apply the corresponding table to the time resource allocation applied in the common search area of the PDCCH in DCI format 1_0.

[0159] The UE performs the following steps to determine the HARQ-ACK codebook by calculating the maximum number of non-overlapping PDSCHs within a specific time slot.

[0160] * Step 1: Search for the PDSCH allocation value in all rows of the PDSCH time resource allocation table that first ends within a time slot. In the corresponding [Table 7], row index 14 ends first. This is represented as 1 in the sequence column. Other row indices that overlap with the corresponding sequence index 14 in at least one symbol are represented as 1x in the sequence column.

[0161] * Step 2: Search for the PDSCH allocation value that first ends at the remaining row indices not represented in the sequence column. In [Table 7], the PDSCH allocation value corresponds to the row with a row index of 7 and a dmrs-TypeA-Position value of 3. Other row indices that overlap with the corresponding sequence index in at least one symbol are represented as 2x in the sequence column.

[0162] * Step 3: Increase and represent the sequence value by repeating Step 2. For example, in [Table 7], search for the PDSCH allocation value that first ends at the row index not represented in the sequence column. In [Table 7], the PDSCH allocation value corresponds to the row with a row index of 6 and a dmrs-TypeA-Position value of 3. Other row indices that overlap with the corresponding sequence index in at least one symbol are represented as 3x in the sequence column.

[0163] * Step 4: End the process when all row indices are represented in sequence. The size of the corresponding sequence is the maximum number of non-time-overlapping PDSCHs that can be scheduled in the corresponding time slot. Scheduling without time overlap means that different PDSCHs are scheduled by TDM.

[0164] In the sequence column of [Table 7], the maximum value of the sequence means the size of the HARQ-ACK codebook for the corresponding time slot, and the sequence value represents the HARQ-ACK codebook point where the HARQ-ACK feedback bit for the corresponding scheduled PDSCH is located. For example, row index 16 in [Table 7] means the second code position in a semi-static HARQ-ACK codebook of size 3. When the set of occasions for candidate PDSCH reception in serving cell c is M A,c , the UE transmitting the HARQ-ACK feedback can calculate M through [Pseudo-code 1] or [Pseudo-code 2] steps A,c . M A,c can be used to determine the number of HARQ-ACK bits that the UE should transmit. Specifically, the cardinality of the set M A,c can be used to configure the HARQ-ACK codebook.

[0165] In another example, the considerations for determining the semi-static HARQ-ACK codebook (or type 1 HARQ-ACK codebook) are described below.

[0166] a) Regarding the set K1 of time slot timing values associated with the active UL BWP

[0167] a)) If the UE is configured to monitor the PDCCH for DCI format 1_0 on serving cell c and is not configured to monitor the PDCCH for DCI format 1_1, K1 is provided by the slot timing values {1, 2, 3, 4, 5, 6, 7, 8} for DCI format 1_0

[0168] b)) If the UE is configured to monitor the PDCCH for DCI format 1_1 on serving cell c, K1 is provided by dl-DataToUL-ACK for DCI format 1_1

[0169] b) For a set of row indices R of a table, the set of row indices R is provided by the first set of row indices of the table provided by PDSCH-TimeDomainResourceAllocationList in PDSCH-ConfigCommon or by Default PDSCH time domain resource allocation A [6, TS 38.214], or if provided by PDSCH-TimeDomainResourceAllocationList in PDSCH-Config, is provided by the union of the first set of row indices and the second set of row indices associated with the active DL BWP and defining the slot offset K0, start and length indicator SLIV, and the corresponding set of PDSCH mapping types for PDSCH reception, as described in [6, TS 38.214]

[0170] c) For the downlink SCS configuration μ provided by subcarrierSpacing in BWP-Downlink and BWP-Uplink for the active DL BWP and active UL BWP respectively DL and the uplink SCS configuration μ DL between the ratios

[0171] d) Dedicated, as described in Section 11.1

[0172] In another example, the following describes the pseudocode for determining the HARQ-ACK codebook.

[0173] [Pseudocode 2 start]

[0174]

[0175]

[0176]

[0177] [Pseudocode 2 end]

[0178] In [Pseudo-code 2], the position of the HARQ-ACK codebook for the HARQ-ACK information of the DCI indicating the DL SPS release is based on the position of the received DL SPS PDSCH. For example, when the start symbol of the transmission of the DL SPS PDSCH is the fourth OFDM symbol based on the time slot and its length is 5 symbols, it is assumed that the HARQ-ACK information indicating the release of the corresponding SPS starts from the fourth OFDM symbol of the time slot in which the DL SPS release is transmitted, maps the PDSCH with a length of 5 symbols, and determines the corresponding HARQ-ACK information through the PDSCH-to-ACK timing indicator and the PUSCH resource indicator included in the control information indicating the DL SPS release. In another example, when the start symbol of the transmission of the DL SPS PDSCH is the fourth OFDM symbol based on the time slot and its length is 5 symbols, it is assumed that the HARQ-ACK information indicating the release of the corresponding SPS starts from the fourth OFDM symbol of the time slot indicated by the time domain resource allocation (TDRA) of the DCI as the DL SPS release, maps the PDSCH with a length of 5 symbols, and determines the corresponding HARQ-ACK information through the PDSCH-to-ACK timing indicator and the PUSCH resource indicator included in the control information indicating the DL SPS release.

[0179] Figure 5 Shows a method for configuring a dynamic HARQ-ACK codebook in the NR system.

[0180] The UE transmits the HARQ-ACK information transmitted within one PUCCH in the corresponding time slot n based on the PDSCH-to-HARQ feedback timing value of the HARQ-ACK information for PUCCH transmission in the time slot n for PDSCH reception or SPS PDSCH release and K0 which is the transmission time slot position information of the PDSCH scheduled in DCI format 1_0 or 1_1. Specifically, for HARQ-ACK information transmission, the UE determines the HARQ-ACK codebook of the PUCCH transmitted in the time slot determined by the PDSCH-HARQ feedback timing and K0 based on the DAI included in the DCI indicating the PDSCH or SPS PDSCH release.

[0181] The DAI includes a counter DAI and a total DAI. The counter DAI is information that notifies the position of HARQ-ACK information corresponding to a PDSCH scheduled in DCI format 1_0 or DCI format 1_1 within the HARQ-ACK codebook. Specifically, the value of the counter DAI within DCI format 1_0 or 1_1 indicates the cumulative value of PDSCH receptions or SPS PDSCH releases scheduled in DCI format 1_0 or DCI format 1_1 in a specific cell c. The cumulative value is configured according to the PDCCH monitoring occasion in which the scheduling DCI exists and the serving cell.

[0182] The total DAI is a value that notifies the HARQ-ACK codebook size. Specifically, the value of the total DAI means the total number of PDSCHs or SPS PDSC releases scheduled before the time point of the scheduling DCI. The total DAI is a parameter used when the HARQ-ACK information in the serving cell includes HARQ-ACK information of a PDSCH scheduled in another cell that includes the serving cell c in carrier aggregation (CA). In other words, in a system operating with one cell, there is no total DAI parameter.

[0183] An example of the operation of the DAI is as Figure 5 shown. Figure 5 Shown is the change in the values of the counter DAI (C-DAI) and the total DAI (T-DAI) indicated by the DCI found for each PDCCH monitoring occasion configured for each carrier when the UE transmits the HARQ-ACK codebook selected based on the DAI in the nth time slot of carrier 0 502 to the PUCCH 520 in the case where two carriers are configured. First, the DCI found at m = 0 506 indicates a value of 512 as 1 through the C-DAI and T-DAI. The DCI found at m = 1 508 indicates a value of 514 as 2 through the C-DAI and T-DAI. The DCI found in carrier 0 502 (c = 0) at m = 2 510 indicates a value of 516 as 3 through the C-DAI and T-DAI. The DCI found in carrier 1 504 (c = 1) at m = 2 510 indicates a value of 516 as 4 through the C-DAI and T-DAI. At this time, when carriers 0 and 1 are scheduled at the same monitoring occasion, the T-DAI all indicates 4.

[0184] In Figure 4 and Figure 5HARQ-ACK codebook determination is performed in the case where only one PUCCH containing HARQ-ACK information is transmitted in a time slot. This is referred to as Mode 1. In an example of a method for determining a PUCCH transmission resource in a time slot, when PDSCHs scheduled by different DCIs are multiplexed and transmitted to one HARQ-ACK codebook in the same time slot, the PUCCH resource selected for transmitting HARQ-ACK is determined to be the PUCCH resource indicated by the PUCCH resource field in the DCI that last schedules the PDSCH. That is, the PUCCH resources indicated by the PUCCH resource fields in the DCIs scheduled before the DCI are ignored.

[0185] The following description defines a method and apparatus for determining a HARQ-ACK codebook in the case where two or more PUCCHs containing HARQ-ACK information can be transmitted in a time slot. This is referred to as Mode 2. The UE can operate only in Mode 1 (transmitting only one HARQ-ACK PUCCH in a time slot) or only in Mode 2 (transmitting one or more HARQ-ACK PUCCHs in a time slot). Alternatively, a UE that supports both Mode 1 and Mode 2 can be configured to operate only in one mode by higher-layer signaling, or Mode 1 and Mode 2 can be implicitly determined by DCI format, RNTI, DCI-specific field values, scrambling, etc. For example, the PDSCH scheduled by DCI format A and its associated HARQ-ACK information are based on Mode 1, and the PDSCH scheduled by DCI format B and its associated HARQ-ACK information are based on Mode 2.

[0186] Determining the HARQ-ACK codebook by the RRC signal is Figure 4 the semi-static HARQ-ACK codebook or Figure 5 the dynamic HARQ-ACK codebook.

[0187] Figure 6 Shows the HARQ-ACK transmission processing for DL SPS.

[0188] Figure 6Reference numeral 600 shows a case where the maximum number of receivable PDSCHs 602, 604, and 606 are mapped when time resources do not overlap in time slot k. For example, when the DCI format for scheduling the PDSCH does not include a PDSCH-to-HARQ feedback timing indicator, the UE transmits HARQ-ACK information 608 in time slot k+1 according to the value 1 configured by higher layer signaling. Therefore, the size of the semi-static HARQ-ACK codebook for time slot k+1 is the same as the maximum number of PDSCHs that can be transmitted in time slot k, which is 3. In addition, when the HARQ-ACK information for each PDSCH is 1 bit, the HARQ-ACK codebook of reference numeral 608 may include Figure 6 a total of 3 bits of [X, Y, Z] in reference numeral 600, and X is the HARQ-ACK information for PDSCH 602, Y is the HARQ-ACK information for PDSCH 604, and Z is the HARQ-ACK information for PDSCH 606. When the PDSCH is successfully received, the corresponding information can be mapped to ACK, otherwise, it is mapped to NACK. In addition, when the DCI does not actually schedule the corresponding PDSCH, the UE reports NACK. Specifically, the position of the HARQ-ACK codebook may vary according to the SLIV of the PDSCH that can be scheduled by the DCI, and can be determined by [Table 7], [Pseudo-code 1], or [Pseudo-code 2]. Figure 6 Reference numeral 610 shows HARQ-ACK transmission in the case of activating DL SPS. In Rel-15 NR, the minimum period of DL SPS is 10 ms. In the subcarrier spacing of 15 kHz in reference numeral 610, the length of one time slot is 1 ms. Therefore, the SPS PDSCH 612 is transmitted in time slot n, and the SPS PDSCH 616 is transmitted in the next time slot n+10.

[0189] The SPS period, HARQ-ACK transmission resource information, MCS table configuration, and the number of HARQ processes are notified by higher signals through the HARQ-ACK information for the SPS PDSCH, and then the frequency resource, time resource, MCS value, etc. are notified according to the information included in the DCI format indicating the activation of the corresponding SPS. As a reference, the PUCCH resource for transmitting HARQ-ACK information can also be configured by higher signals, and the PUCCH resource has the following attributes.

[0190] - Presence or absence of hopping

[0191] - PUCCH format (starting symbol, symbol length, etc.)

[0192] Here, the MCS table configuration and HARQ-ACK transmission resource information may not exist. When the HARQ-ACK transmission resource information exists, PUCCH format 0 or 1 that supports up to 2-bit transmission is supported in Rel-15 NR. However, PUCCH formats 2, 3, or 4 with 2 bits or more can be fully supported in subsequent releases.

[0193] Since the HARQ-ACK transmission resource information is included in the DL SPS higher signal configuration, the UE can ignore the PUCCH resource indicator in the DCI format indicating DL SPS activation. Alternatively, the PUCCH resource indicator field may not exist in the corresponding DCI format. On the other hand, when the HARQ-ACK transmission resource information does not exist in the DL SPS higher signal configuration, the UE transmits the HARQ-ACK information corresponding to the DL SPS through the PUCCH resource determined by the PUCCH resource indicator of the DCI format for activating the DL SPS. In addition, the difference between the time slot for transmitting the SPS PDSCH and the time slot for transmitting the corresponding HARQ-ACK information is determined by the value indicated by the PDSCH-to-HARQ-ACK feedback timing indicator of the DCI format for activating the DL SPS, or when there is no indicator, a specific value preconfigured by the higher signal is used. For example, when the PDSCH-to-HARQ-ACK feedback timing indicator is 2, as Figure 6 shown by reference numeral 610 in, the HARQ-ACK information of the SPS PDSCH 612 transmitted in time slot n is transmitted through the PUCCH 614 in time slot n+2. In addition, the PUCCH for transmitting the corresponding HARQ-ACK information can be configured by the higher signal, or the corresponding resources can be determined by the L1 signal indicating DL SPS activation. When it is assumed that Figure 6 as shown by reference numeral 600 in, at most three PDSCHs can be received, and the time resources of the PDSCH 612 are the same as those of the PDSCH 604, the position of the HARQ-ACK codebook of the SPS PDSCH 612 transmitted by the PUCCH 614 corresponds to Y in [X Y Z].

[0194] When transmitting the DCI indicating the release of DL SPS, the UE shall transmit the HARQ-ACK information corresponding to the DCI to the BS. However, in the case of the semi-static HARQ-ACK codebook, the size and position of the HARQ-ACK codebook are determined by the time resource region to which the PDSCH is allocated and the slot interval between the PDSCH and HARQ-ACK (PDSCH-to-HARQ-ACK feedback timing), and this slot interval is indicated by the L1 signal or a higher signal as described above. Therefore, when the DCI indicating the release of DL SPS is sent to the semi-static HARQ-ACK codebook, it is not necessary to randomly determine the position within the HARQ-ACK codebook, but specific rules are required, and the position of the HARQ-ACK information of the DCI indicating the release of DL SPS is mapped to the same transmission resource region as the corresponding DL SPS PDSCH in Rel-15. For example, Figure 6 Reference numeral 620 of Figure 6 shows the case where a DCI 622 indicating the release of the activated DL SPS PDSCH is transmitted in slot n. When the PDSCH-to-HARQ-ACK feedback timing indicator included in the format of the corresponding DCI 622 indicates 2, the HARQ-ACK information corresponding to the DCI 622 is transmitted through the PUCCH 623 in slot n+2, and the UE maps the HARQ-ACK information of the DCI 622 indicating the release of DL SPS to the position of the HARQ-ACK codebook corresponding to the corresponding SPS PDSCH and transmits this HARQ-ACK information based on the assumption that the pre-configured SPS PDSCH is scheduled in slot n. In this regard, the following two methods are possible, and the BS and the UE send and receive the corresponding DCI through one method by means of a standard or BS configuration.

[0195] * Method 6-1-1: Transmit the DCI indicating the release of DL SPS only in the slot in which the pre-configured SPS PDSCH is transmitted.

[0196] For example, when the SPS PDSCH is configured to be transmitted in slot n as shown by Figure 6 reference numeral 620 of Figure 6 , the UE transmits the DCI 622 indicating the release of the SPS PDSCH only in slot n, and thus the position of the slot for transmitting the HARQ-ACK information is the same as the position determined based on the assumption of transmitting the SPS PDSCH. In other words, when the slot for transmitting the HARQ-ACK information for the SPS PDSCH is n+2, the slot for transmitting the HARQ-ACK information for the DCI indicating the release of the DL SPS PDSCH is also n+2.

[0197] *Method 6-1-2: Transmit the DCI indicating the DL SPS release in a random time slot without considering the time slot for transmitting the SPS PDSCH.

[0198] For example, when transmitting the SPS PDSCH in time slots n, n+10, n+20…, as Figure 6 shown by reference numeral 620 in, the BS transmits the DCI 624 indicating the release of the corresponding DL SPS PDSCH in time slot n+3, and when the value indicated by the PDSCH-to-HARQ-ACK feedback timing indicator included in the corresponding DCI is 1 or there is no corresponding field and the value preconfigured by a higher signal is 1, the HARQ-ACK information 626 for the DCI indicating the DL SPS PDSCH release is sent and received in time slot n+4.

[0199] The minimum period of the DL SPS can be shorter than 10 milliseconds. For example, when there is wireless data requiring high reliability and low latency, the transmission period of the corresponding data is regular and the period itself is short. The periods of different devices in the factory should be shorter than the current 10 ms period. Therefore, the DL SPS transmission period can be determined in units of time slots, symbols or symbol groups instead of in ms, regardless of the subcarrier spacing. For reference, the minimum transmission period of the uplink configured grant PUSCH resource is two symbols.

[0200] Figure 6Reference numeral 630 shows a case where the DL SPS transmission period is 7 symbols smaller than a time slot. Since the transmission period is within one time slot, up to two SPS PDSCHs 632 and 634 can be transmitted in time slot k. When there is no value indicated by the PDSCH-to-HARQ-ACK feedback timing indicator included in the DCI indicating SPS activation or there is no corresponding field, according to the value preconfigured by a higher signal, the HARQ-ACK information corresponding to the SPS PDSCH 632 and the SPS PDSCH 634 is transmitted in the time slot. For example, when the corresponding value is i, the UE transmits the HARQ-ACK information 636 for the SPS PDSCH 632 and the SPS PDSCH 634 in time slot k + 1. For the position of the HARQ-ACK codebook included in the HARQ-ACK information, not only the TDRA, which is the time resource information for scheduling the SPS PDSCH, but also the transmission period needs to be considered. Since usually only one SPS PDSCH can be transmitted in each time slot, the HARQ-ACK codebook position is determined based on the TDRA as the time resource information without considering the transmission period. However, when the DL SPS transmission period is less than one time slot, it is necessary to consider both the TDRA as the time resource information and the transmission period to determine the HARQ-ACK codebook position. The TDRA is the time domain resource allocation, including the transmission start symbol and length information of the SPS PDSCH. For example, when the DL SPS transmission period is 7 symbols, the start symbol of the DL SPS PDSCH determined by the TDRA is 2 and the length is 3, as Figure 6 indicated by reference numeral 630, there are two DL SPS PDSCHs in one time slot. That is, the first SPS PDSCH 632 is a PDSCH with OFDM symbol indices 2, 3, and 4 determined by the TDRA, and the second SPS PDSCH 634 is a PDSCH with OFDM symbol indices 9, 10, and 11 considering the TDRA and the transmission period of 7 symbols. That is, the second SPS PDSCH within the time slot has the same length as the first SPS PDSCH but has an offset that moves with the transmission period. In summary, in the generation or determination of the semi-static HARQ-ACK codebook, when the SPS PDSCH transmission period is greater than one time slot, the UE uses the time resource allocation information to determine the position of the HARQ-ACK codebook of the SPS PDSCH within one time slot, and when the SPS PDSCH transmission period is less than one time slot, the UE considers both the time resource allocation information and the SPS PDSCH transmission period.

[0201] When the SPS PDSCH transmission period is less than one time slot, the SPS PDSCH can be located at the time slot boundary according to the combination of the transmission period and the TDRA. Figure 6Reference label 650 shows a corresponding example. In this case, the BS configures an SPS PDSCH that exceeds the time slot boundary to be repetitively transmitted while being divided into PDSCH 652 and PDSCH 654. At this time, PDSCH 652 and PDSCH 654 may always have the same length or different lengths. In addition, the UE only transmits a segment of HARQ-ACK information 656 of the SPS PDSCH including PDSCH652 and PDSCH 654, and the time slot used as the corresponding reference is based on time slot k+1 repetitively transmitted in PDSCH 654.

[0202] [Embodiment 6-1: Method for Mapping a Semi-Static HARQ-ACK Codebook for DCI Indicating DL SPS Release]

[0203] When the transmission period of the SPS PDSCH is less than one time slot, the UE maps the HARQ-ACK codebook for the corresponding DCI by at least one of the following methods to transmit the HARQ-ACK information of the DCI requesting the release of the corresponding SPS PDSCH based on the semi-static HARQ-ACK codebook.

[0204] * Method 6-2-1: The position of the semi-static HARQ-ACK codebook for the HARQ-ACK information of the DCI indicating the SPS PDSCH release is the same as the position of the HARQ-ACK codebook of the SPS PDSCH that is first located in terms of time resources in the SPS PDSCH received within one time slot.

[0205] - When the number of SPS PDSCHs in the time slot for transmitting the DCI indicating the SPS PDSCH release is greater than or equal to 2, the UE maps the HARQ-ACK information of the corresponding DCI to the position of the semi-static HARQ-ACK codebook of the HARQ-ACK information of the first SPS PDSCH in time and transmits the HARQ-ACK information.

[0206] For example, when the maximum number of PDSCHs that can be transmitted without simultaneously receiving PDSCHs is 4, including the SPS PDSCH in the time slot for transmitting the DCI indicating the SPS PDSCH release, the size of the HARQ-ACK codebook for the corresponding time slot is 4, and the HARQ-ACK information of the SPS PDSCH or PDSCH reception is mapped to each position of {1, 2, 3, 4}. When the corresponding AHRQ-ACK information is mapped to the positions of {2} and {3} of two SPS PDSCHs, the HARQ-ACK information indicating the DL SPS PDSCH release is mapped to the position of {2}.

[0207] *Method 6-2-2: The position of the semi-static HARQ-ACK codebook for the HARQ-ACK information of the DCI indicating the SPS PDSCH release is the same as the position of the HARQ-ACK codebook of the SPS PDSCH that is last positioned in terms of time resources among the SPS PDSCHs received within one time slot.

[0208] - When the number of SPS PDSCHs in the time slot used for transmitting the DCI indicating the SPS PDSCH release is greater than or equal to 2, the UE maps the HARQ-ACK information of the corresponding DCI to the position of the semi-static HARQ-ACK codebook of the HARQ-ACK information of the SPS PDSCH that is last in time and transmits the HARQ-ACK information.

[0209] For example, when the maximum number of PDSCHs that can be transmitted without simultaneously receiving PDSCHs is 4, including the SPS PDSCH in the time slot used for transmitting the DCI indicating the SPS PDSCH release, the size of the HARQ-ACK codebook for the corresponding time slot is 4, and the HARQ-ACK information of the SPS PDSCH or PDSCH reception is mapped to each position of {1, 2, 3, 4}. When the corresponding AHRQ-ACK information is mapped to the positions of {2} and {3} of two SPS PDSCHs, the HARQ-ACK information indicating the DL SPS PDSCH release is mapped to the position of {3}.

[0210] *Method 6-2-3: The position of the semi-static HARQ-ACK codebook for the HARQ-ACK information of the DCI indicating the SPS PDSCH release is the same as the position of all HARQ-ACK codebooks for the SPS PDSCH received within one time slot.

[0211] - When the number of SPS PDSCHs in the time slot used for transmitting the DCI indicating the SPS PDSCH release is greater than or equal to 2, the UE repeatedly maps the HARQ-ACK information of the corresponding DCI to the position of the semi-static HARQ-ACK codebook of the HARQ-ACK information of all SPS PDSCHs and transmits the HARQ-ACK information.

[0212] For example, when the maximum number of PDSCHs that can be transmitted without simultaneous PDSCH reception is 4, including the SPS PDSCH in the time slot for transmitting the DCI indicating the release of the SPS PDSCH, the size of the HARQ-ACK codebook for the corresponding time slot is 4, and the HARQ-ACK information of the SPS PDSCH or PDSCH reception is mapped to each position of {1, 2, 3, 4}. When the corresponding AHRQ-ACK information is mapped to the positions of {2} and {3} of two SPS PDSCHs, the HARQ-ACK information indicating the release of the DL SPS PDSCH is repeatedly mapped to the positions of {2} and {3}. That is, the same HARQ-ACK information is mapped to the positions of {2} and {3}.

[0213] *Method 6-2-4: As the position of the semi-static HARQ-ACK codebook of the HARQ-ACK information for the DCI indicating the release of the SPS PDSCH, one of the multiple positions of the HARQ-ACK codebook candidates of the SPS PDSCH received in a time slot is selected by the BS through a higher layer signal, an L1 signal, or a combination thereof.

[0214] - When the number of SPS PDSCHs in the time slot for transmitting the DCI indicating the release of the SPS PDSCH is two or more, the BS selects one of the positions of the semi-static HARQ-ACK codebook of the HARQ-ACK information of the SPS PDSCH through a higher layer signal, an L1 signal, or a combination thereof, and the UE maps and transmits the HARQ-ACK information of the corresponding DCI at the selected position.

[0215] - For example, when the maximum number of PDSCHs that can be transmitted while not simultaneously receiving PDSCHs is 4, including the SPS PDSCH in the time slot for transmitting the DCI indicating the release of the SPS PDSCH, the size of the HARQ-ACK codebook for the corresponding time slot is 4, and the HARQ-ACK information of the SPS PDSCH or PDSCH reception is mapped to each position in {1, 2, 3, 4}. In the case where the corresponding HARQ-ACK information is mapped to the positions of {2} and {3} in two SPS PDSCHs, the BS selects {2} by using the DCI indicating the release of the DL SPS PDSCH, and the UE maps the HARQ-ACK information indicating the release of the DL SPS PDSCH to the position of {2} and transmits the HARQ-ACK information. The time resource allocation field, HARQ process number, or PDSCH-to-HARQ feedback timing indicator can be used for the DCI field to determine the position of the semi-static HARQ-ACK codebook. For example, the time resource allocation field in the DCI indicating the release of the SPS PDSCH can indicate the time resource information of one of the SPS PDSCHs that can be transmitted in the corresponding time slot, and the UE can transmit the HARQ-ACK information of the corresponding DCI at the position of the semi-static HARQ-ACK codebook corresponding to the indicated SPS PDSCH.

[0216] * Method 6-2-5: The position of the semi-static HARQ-ACK codebook for the HARQ-ACK information of the DCI indicating the release of the SPS PDACH is indicated or configured by the BS through a higher signal, L1 signal, or a combination thereof.

[0217] - When the maximum number of SPS PDSCHs that can be received in the time slot for transmitting the DCI indicating the release of the SPS PDSCH is two or more, the BS selects one of the positions of the semi-static HARQ-ACK codebook for the HARQ-ACK information of the corresponding PDSCH through a higher signal, L1 signal, or a combination thereof, and the UE maps and transmits the HARQ-ACK information of the corresponding DCI at the selected position.

[0218] - The set of positions of the semi-static HARQ-ACK codebook that can be selected by the BS through Method 6-2-4 includes the positions of the semi-static HARQ-ACK codebook to which the HARQ-ACK information of the SPS PDSCH can be mapped, while the set of positions of the semi-static HARQ-ACK codebook that can be selected by the BS through Method 6-2-5 includes the positions of the semi-static HARQ-ACK codebook to which the HARQ-ACK information of all PDSCHs can be mapped.

[0219] For example, when the maximum number of PDSCHs that can be transmitted without simultaneous PDSCH reception is 4, including the SPS PDSCH in the time slot for transmitting the DCI indicating the release of the SPS PDSCH, the size of the HARQ-ACK codebook for the corresponding time slot is 4, and the HARQ-ACK information of the SPS PDSCH or PDSCH reception is mapped to each position of {1, 2, 3, 4}. The BS selects {1} by using the DCI indicating the release of the DL SPS PDSCH, and the UE maps the HARQ-ACK information indicating the release of the DL SPS PDSCH to the position of {1} and transmits the HARQ-ACK information. The time resource allocation field, HARQ process number, or PDSCH-to-HARQ feedback timing indicator can be used in the DCI field to determine the position of the semi-static HARQ-ACK codebook. For example, the time resource allocation field indicating the release of the SPS PDSCH in the DCI indicates the time resource information of one of the PDSCIs that can be transmitted in the corresponding time slot, and the UE transmits the HARQ-ACK information of the corresponding DCI in the position of the semi-static HARQ-ACK codebook corresponding to the indicated SSP PDSCH.

[0220] The method can be executed in the case where only one HARQ-ACK transmission is supported in one time slot. When performing transmission of a higher configuration based on code block groups (CBGs) through the DL SPS PDSCH, the UE can repeat the HARQ-ACK information of the DCI indicating the release of the DL SPS PDSCH the number of times of the GBG, map the HARQ-ACK information to the semi-static HARQ-ACK codebook resource determined by at least one of these methods, and transmit the HARQ-ACK information. The method is described as a method for transmitting the HARQ-ACK information of the DL SPS PDSCH indicating the release of one SPS PDSCH transmission / reception, but can be fully applied to the method for transmitting the HARQ-ACK information of the DL SPS PDSCH indicating the transmission / reception of two or more activated PDSCHs in one cell / one BWP without any change or correction. For example, when one DL SPS PDSCH release signal is associated with multiple SPS PDSCHs activated in one cell / one BWP, the SPS PDSCH for which the HARQ-ACK codebook position is considered to be selected can be typically an SPS PDSCH belonging to one configuration or belonging to all configurations. At this time, when the SPS PDSCH typically belongs to one configuration, the representative configuration can be the SPS PDSCH configuration number with the lowest index or the first activated SPS PDSCH configuration. This is just an example, and other similar methods are quite possible.

[0221] [Embodiment 6-2: Method for Mapping Dynamic HARQ-ACK Codebooks of Multiple SPS PDSCHs Transmitted in One Time Slot]

[0222] In a dynamic HARQ-ACK codebook (or HARQ-ACK codebook of type 2), the corresponding HARQ-ACK information is basically determined by the total DAI and the counter DAI included in the DCI for scheduling the PDSCH. The total DAI notifies the size of the HARQ-ACK codebook transmitted in time slot n, and the counter DAI notifies the position of the HARQ-ACK codebook transmitted in time slot n. The dynamic HARQ-ACK codebook is configured by [Pseudo-code 3] in Rel-15 NR.

[0223] [Start of Pseudo-code 3]

[0224]

[0225]

[0226]

[0227]

[0228] [End of Pseudo-code 3]

[0229] In the case where the transmission period of the SPS PDSCH is greater than one time slot, [Pseudo-code 3] is applied. When the transmission period of the DSP PDSCH is less than one time slot, the dynamic HARQ-ACK codebook is determined by [Pseudo-code 4]. Alternatively, regardless of the SPS PDSCH transmission period or the number of SPS PDSCHs activated in a cell / a BWP, [Pseudo-code 4] can generally be applied.

[0230] [Start of Pseudo-code 4]

[0231]

[0232]

[0233]

[0234]

[0235] [End of Pseudo-code 4]

[0236] In [Pseudo-code 4], when there may be multiple SPS PDSCH configurations in a cell / a BWP, the value of k as the number of SPS PDSCHs in one time slot can correspond to only one SPS PDSCH configuration, or can include all SPS PDSCH configurations.

[0237] [Pseudo-code 3] or [Pseudo-code 4] can be applied to the case where HARQ-ACK information transmission is restricted to at most one transmission per time slot.

[0238] [Embodiment 6-3: Method for Separately Transmitting HARQ-ACKs of Multiple SPS PDSCHs Transmitted in One Time Slot]

[0239] When the UE receives a configuration of a DL SPS transmission period less than one time slot and only one HARQ-ACK transmission per time slot from the BS via a higher signal, the UE transmits HARQ-ACK information for the DL SPS PDSCH 632 and the DL SPS PDSCH 634 received in time slot k via the PUCCH in time slot k+i indicated in advance by the higher signal, the L1 signal, or a combination thereof, as Figure 6 shown by reference numeral 630. For example, the UE determines the granularity of the PDSCH-to-HARQ-ACK timing indicator in the DCI format indicating DL SPS activation to be at the time slot level, the BS provides the difference between the time slot index for receiving the DL SPS PDSCH and the time slot index for transmitting the HARQ-ACK information to the UE, and configures the PUCCH resource for transmitting the HARQ-ACK information in the time slot indicated by the L1 in the UE via the higher signal. Figure 6 Reference numeral 630 shows the case of the PDSCH-to-HARQ-ACK timing indication i value. The corresponding value can be directly selected by the L1 signal, or candidate values are configured by the higher signal, and one of them can be selected by the L1 signal.

[0240] When the UE or the BS wishes to separately transmit and receive HARQ-ACK information for the DL SPS PDSCHs for separate transmission and reception, the BS can configure a DL SPS transmission period less than one time slot and perform two or more HARQ-ACK transmissions per time slot via the higher signal. For example, as Figure 6 shown by reference numeral 660, the HARQ-ACK information of the SPS PDSCH 662 received in time slot k can be transmitted via the PUCCH 666 in time slot k+i, and the HARQ-ACK information of the SPS PDSCH 664 can be transmitted via the PUCCH 668 in time slot k+i. To make this possible, for example, the UE determines the granularity of the PDSCH-to-HARQ-ACK timing indicator in the DCI format indicating DL SPS activation to be at the symbol level, and the corresponding value means the total symbol length from the transmission end symbol (or transmission start symbol) of the SPS PDSCH to the transmission start symbol (or transmission end symbol) of the PUCCH for transmitting the corresponding HARQ-ACK information. In Figure 6In reference numeral 660, when the end symbol of SPS PDSCH 662 is s0 and the start symbol of PUCCH 666 for transmitting HARQ-ACK information of SPS PDSCH 662 is s1, the value indicated by the PDSCH-to-HARQ-ACK timing indicator is "s1 - s0", and this value can be directly selected by the L1 signal, or candidate values can be configured by a higher signal and then one of them can be determined by the L1 signal. With this information, the UE can determine the start symbol of the PUCCH to transmit HARQ-ACK information for the SPS PDSCH. Other PUCCH transmission information can be determined by a higher signal, the L1 signal, or a combination thereof. When using the PUCCH resource indicator in Rel-15 L1 or higher signals, the UE can determine that the "start symbol index" field with the value indicated by the corresponding indicator is not used. Alternatively, since the start symbol for transmitting HARQ-ACK information has been provided by the PDSCH-to-HARQ-ACK timing indicator, a signal including a new higher signal, a new L1 signal, or a combination thereof without the corresponding field can be provided to the UE. In summary, the UE can interpret the PDSCH-to-HARQ-ACK timing indicator field included in the DCI indicating the activation of the SPS PDSCH differently according to the SPS PDSCH transmission period.

[0241] - Method 6-3-1: Determination at the slot level

[0242] For example, when the SPS PDSCH transmission period is greater than one slot, the UE determines the granularity of the PDSCH-to-HARQ-ACK timing indicator at the slot level.

[0243] - Method 6-3-2: Determination at the symbol level

[0244] For example, when the SPS PDSCH transmission period is less than one slot, the UE determines the granularity of the PDSCH-to-HARQ-ACK timing indicator at the symbol level.

[0245] [Example 6-4: Method for Changing the DL SPS / CG Period of Aperiodic Services]

[0246] The BS-supported DL SPS transmission period is in units of time slots or symbols. When information that is sensitive to the latency time of devices operating at a factor is generated periodically and the corresponding period is not a value in the standards supported by the 3GPP standard organization or a multiple of that value, the BS cannot configure an effective DL SPS transmission period. For example, when there is a service pattern with a 2.5-symbol interval, the BS cannot allocate DL SPS with a transmission period of only 2 symbols or 3 symbols. Therefore, it is necessary to configure an aperiodic DL SPS transmission period or introduce a signal for dynamically changing the transmission period. The UE can dynamically change the transmission period by at least one of the following methods.

[0247] *Method 6-4-1: Method for allocating an aperiodic DL SPS transmission period

[0248] - The BS can configure the DL SPS transmission period in a bitmap type. For example, when there is bitmap information including 10 bits in a higher signal and a case where it is 1 means DL SPS transmission and a case where the bitmap information is 0 means DL SPS non-transmission, if the bit unit refers to the time slot unit, various modes of DL SPS transmission periods can be performed, even though it is not a 10-time slot period. In addition, the corresponding pattern can be repeated in units of 10 time slots. Alternatively, the interval indicated by the bitmap size and the corresponding bit can be a time slot, a symbol, or a symbol group. Among them, the corresponding information can be independently configured by a higher signal or the range of the transmission interval indicated by each bit according to the bitmap size can be changed. For example, when the bitmap size is 20, the time range indicated by each bit can be 7 symbol units, and when the bitmap size is 10, it can be a time slot unit.

[0249] - Alternatively, the BS can pre-configure two or more DL SPS transmission periods through a higher signal and configure the time difference of continuously transmitted DL SPS in the form of a pattern. For example, a DL SPS transmission period with a 2-symbol interval or a 3-symbol interval may be determined for a 2.5-symbol serving mode. [Table 8] The following is a table related to the aperiodic DL SPS transmission period configuration. Z is a decimal number with the first decimal place, and has a relationship of X < Z < X + 1. For example, when Z is 3.2, X is 3. Gap 1 represents the symbol interval between the first SPS PDSCH resource received by the UE after receiving the DCI indicating SPS activation and the second SPS PDSCH resource. Gap 2 represents the symbol interval between the second SPS PDSCH resource and the third SPS PDSCH resource. That is, gap i represents the symbol interval between the i-th SPS PDSCH resource and the (i + 1)-th SPS PDSCH resource. The configuration is a parameter for selecting one of various patterns, and [Table 8] shows that there are a total of 9 patterns in the configuration. The corresponding parameters are provided to the UE through a higher signal or an L1 signal, and the UE can detect the DL SPS PDSCH transmission period pattern through the value indicated by the corresponding parameters. In another example, a value of the configuration can be implicitly determined according to the service generation period value. For example, when the BS and the UE send and receive the corresponding information in the 2.3-symbol serving mode through a higher signal, the BS and the UE can determine that Configuration 3 is applied.

[0250] [Table 8]

[0251]

[0252]

[0253] * Method 6-4-2: Method for changing the dynamic DL SPS transmission period

[0254] - Method 6-4-2-1: Include the transmission period information in the DCI indicating DL SPS activation

[0255] The DL SPS transmission period value is included in the information within the DCI. For the corresponding transmission period value, a set of candidate values is configured by a higher layer signal, and a specific value is selected from the corresponding set by the DCI. For example, within a DCI having a transmission period configured by a higher layer signal as {1 time slot, 2 time slots}, 1 bit of a transmission period field is generated, and this 1 bit indicates whether the transmission period is 1 time slot or 2 time slots. That is, the number of DCI bits is determined according to the set of transmission periods configured by the higher layer signal, and when the number of the set is N, a total of ceil(log2(N)) bits are configured within the DCI. The corresponding DCI corresponds to a non-fallback DCI such as DCI format 1_1, and when there is no corresponding fallback DCI field such as DCI format 1_0, or even if the field exists, the fixed bit values and period values associated with the corresponding bit values can always be applied.

[0256] - Method 6-4-2-2: Use an existing field 1 indicating DL SPS activation in the DCI format

[0257] When a field in the DCI format indicating DL SPS activation indicates a specific value, the value of another field can be used to indicate the transmission period instead of indicating the value initially indicated. For example, when all bit values in the field indicating the HARQ process number indicate "1", the field indicating time resource information can be used to indicate one of the DL SPS transmission periods in the set of DL SPS transmission periods preconfigured by a higher layer signal.

[0258] - Method 6-4-2-3: Use an existing field 2 indicating DL SPS activation in the DCI format

[0259] In the case of a DCI format indicating DL SPS activation, a specific field in the corresponding DCI format itself is a field that always indicates the transmission period, or a specific value in a specific field within the corresponding DCI can indicate the transmission period. For example, when the time resource allocation field of the DCI format is verified to be in a format indicating SPS PDSCH activation, it is determined that the corresponding time resource allocation field is used to indicate the SPS PDSCH transmission period instead of conventionally indicating the start symbol and length of the SPS PDSCH.

[0260] - Method 6-4-2-4: Implicitly configure transmission period information based on the search space

[0261] Dynamically change the transmission period according to the search space for sending DCI indicating DL SPS activation. For example, the UE can implicitly determine that the DCI indicating DL SPS activation sent in the common search space has a transmission period A, and the DCI indicating DL SPS activation sent in the UE-specific search space has a transmission period B. The transmission periods A and B can be pre-configured by the UE via a higher-layer signal.

[0262] - Method 6-4-2-5: Implicitly configure transmission period information based on DCI format

[0263] Dynamically change the transmission period value according to the DCI format indicating DL SPS activation. For example, the UE can implicitly determine that the DCI indicating DL SPS activation sent in DCI format 1_0 corresponding to the fallback DCI has a transmission period A, and the DCI indicating DL SPS activation sent in DCI format 1_1 corresponding to the non-fallback DCI has a transmission period B. The transmission periods A and B can be pre-configured by the UE via a higher-layer signal.

[0264] In this disclosure, the UE does not expect to receive the configuration or indication of DL SPS PDSCH time resource information outside the DL SPS transmission period, and when the corresponding configuration or indication is sent, it regards the configuration or indication as an error and ignores it.

[0265] Figure 7 is a block diagram showing a process in which the UE transmits HARQ-ACK information based on a semi-static HARQ-ACK codebook for DCI indicating SPS PDSCH deactivation.

[0266] The UE receives SPS PDSCH configuration information through a higher signal. At this time, the information configured by the higher signal may include a transmission period, an MCS table, HARQ-ACK configuration information, etc. After receiving the higher signal, in operation 700, the UE receives DCI from the BS for activating the SPS PDSCH. After receiving the DCI indicating activation, in operation 702, the UE periodically receives the SPS PDSCH and transmits the corresponding HARQ-ACK information. Thereafter, when there is no longer downlink data to be periodically transmitted and received, in operation 704, the BS sends DCI indicating deactivation of the SPS PDSCH to the UE, and the UE receives the DCI. In operation 706, the UE transmits HARQ-ACK information indicating deactivation of the SPS PDSCH according to the SPS PDSCH transmission period. For example, when the transmission period is greater than one time slot, the UE inserts the HARQ-ACK information indicating deactivation of the SPS PDSCH into the HARQ-ACK codebook position corresponding to the SPS PDSCH in the HARQ-ACK information and transmits the HARQ-ACK information. The HARQ-ACK information can be transmitted by Figure 6 at least one of the methods 6-1-1 or 6-1-2 described therein. When the transmission period is less than one time slot, the UE can transmit the HARQ-ACK information indicating deactivation of the SPS PDSCH by at least one of the methods 6-2-1 to 6-2-5. The description with reference to Figure 7 corresponds to the operations applied to the case where the UE pre-receives a configured semi-static HARQ-ACK codebook from the BS through a higher signal. In addition, the description with reference to Figure 7 can be applied only to the case where the UE pre-receives a configuration such that only one HARQ-ACK is transmitted per time slot through a higher signal, a standard, or UE capabilities.

[0267] Figure 8 is a block diagram showing the method by which the UE determines the dynamic HARQ-ACK codebook for SPS PDSCH reception.

[0268] When the UE pre-receives a configuration for operating based on a dynamic HARQ-ACK codebook through a higher signal, in operation 800, the UE starts to determine the size of the HARQ-ACK codebook for the HARQ-ACK information to be transmitted in a specific time slot. In operation 802, the UE not only determines the size of the HARQ-ACK codebook for the dynamically scheduled PDSCH, but also calculates the total number of SPS PDSCHs generated in the time slot corresponding to the time slot in which the HARQ-ACK information is transmitted and reflects this quantity in the size of the HARQ-ACK codebook. The UE can determine this by referring to Figure 6Configure the dynamic HARQ-ACK codebook using at least one of the described [Pseudo-code 3] or [Pseudo-code 4]. Thereafter, in operation 804, the UE ends the determination of the HARQ-ACK codebook size and transmits HARQ-ACK information in the corresponding time slot. Additionally, the description made with reference to Figure 8 can be applied only to the case where the UE pre-receives a configuration such that only one HARQ-ACK is transmitted per time slot via a higher signal, standard, or UE capability. As a reference, when an SPS PDSCH is repeatedly transmitted at the time slot boundary as shown by the reference number 650 in Figure 6 the UE determines the size of the HARQ-ACK codebook based on the time slot in which the SPS PDSCH was most recently repeatedly transmitted to determine the dynamic HARQ-ACK codebook. Specifically, in the case of time slot k, the SPS PDSCH 652 is transmitted as shown by the reference number 650 in Figure 6 however, the UE determines the size of the dynamic HARQ-ACK codebook for the SPS PDSCH 654 to be transmitted in time slot k + 1, rather than determining the size of the dynamic HARQ-ACK codebook without counting the number of valid SPS PDSCHs. Additionally, when determining the size of the dynamic HARQ-ACK codebook for a specific time slot in [Pseudo-code 4], when determining the number (k) of SPS PDSCHs per time slot, the number of valid SPS PDSCHs is calculated in the time slot (or end time slot) to which the end symbol of the last SPS PDSCH in the repeatedly transmitted SPS PDSCHs belongs.

[0269] Figure 9 is a block diagram showing a method by which a UE transmits HARQ-ACK information according to its DL SPS transmission period.

[0270] In operation 900, the UE receives the DL SPS transmission period provided by a higher signal or L1 signal or the maximum number of configuration information for per-time-slot AHRQ-ACK information transmission. Additionally, in operation 902, the UE identifies the DL SPS transmission period and the per-time-slot HARQ-ACK information transmission conditions. When condition 1 is met, in operation 904, the UE transmits the first type of HARQ-ACK information. When condition 2 is met, in operation 906, the UE transmits the second type of HARQ-ACK information. Condition 1 can be at least one of the following conditions.

[0271] - The transmission period of the DL SPS PDSCH is greater than one time slot

[0272] - The condition that at most one HARQ-ACK transmission is possible per time slot. Condition 2 can be at least one of the following conditions.

[0273] - The transmission period of the DL SPS PDSCH is less than one time slot

[0274] – Two or more HARQ-ACK transmissions per time slot are possible

[0275] The first type of HARQ-ACK information transmission includes the following fields within the DCI format indicating the activation of the DL SPS PDSCH.

[0276] - PDSCH-to-HARQ-ACK feedback timing indicator: Indicates the time slot unit interval between the time slot for transmitting the PDSCH and the time slot for transmitting the HARQ-ACK information. When an SPS PDSCH is repetitively transmitted at the time slot boundary as shown by the reference label 650 as Figure 6 shown, the reference for the time slot for transmitting the PDSCH is the time slot of the last repetitively transmitted SPS PDSCH.

[0277] - PUCCH resource indicator: Number of symbols, start symbol, PRB index, PUCCH format, etc.

[0278] With this information, the UE can configure the PUCCH transmission resources and transmission format for the transmission of HARQ-ACK information for the DL SPS PDSCH. In addition, the values of these two fields can have a set of values, which can be pre-configured by a higher layer signal, and one of them is selected by the DCI.

[0279] The second type of HARQ-ACK information transmission includes the following fields within the DCI format indicating the activation of the DL SPS PDSCH.

[0280] - PDSCH-to-HARQ-ACK feedback timing indicator: Indicates the symbol unit interval between the end symbol of the PDSCH and the start symbol for transmitting the HARQ-ACK information.

[0281] - PUCCH resource indicator: Number of symbols, PRB index, PUCCH format, etc.

[0282] With this information, the UE can configure the PUCCH transmission resources and transmission format for the transmission of HARQ-ACK information for the DL SPS PDSCH. In addition, the values of these two fields can have a set of values, which can be pre-configured by a higher layer signal, and one of them is selected by the DCI.

[0283] Figure 10 is a block diagram showing the UE operation for dynamically changing the DL SPS transmission period.

[0284] The UE receives SPS PDSCH higher layer information, including the transmission period, the MAC table, and HARQ-ACK information. Thereafter, in operation 1000, the UE receives DCI indicating the activation of the SPS PDSCH. In operation 1002, the UE receives the SPS PDSCH in the resource region determined by the higher layer signal and the L1 signal, and transmits the corresponding HARQ-ACK information. In operation 1004, the UE receives DCI indicating SPS PDSCH change information. The change information may include the SPS, PDSCH transmission period value, and the MCS value, or the frequency and time resource region size. For reference, the available methods for changing the SPS PDSCH transmission period may include referring to Figure 6 at least one of the methods 6-4-1 to 6-4-2 described. After receiving the DCI, in operation 1006, the UE receives the SPS PDSCH through the changed information and transmits the corresponding HARQ-ACK information. When the SPS PDSCH transmission period is changed by the higher layer signal or the L1 signal, if an SPS PDSCH beyond the time slot boundary is generated, and the time slot boundary may be generated according to the transmission period and the time resource region in which the SPS PDSCH is transmitted and received, the UE may transmit and receive the corresponding SPS PDSCH through at least one of the following methods.

[0285] - Method 10-1: Do not transmit and receive the corresponding SPS PDSCH

[0286] For example, as shown by reference numeral 650 in Figure 6 when the SPS PDSCH is allocated in time slots k and k+1, the UE considers the allocated SPS PDSCH configuration incorrect and does not receive the SPS PDSCH and also does not transmit the corresponding HARQ-ACK information.

[0287] - Method 10-2: Repeat transmitting and receiving the corresponding SPS PDSCH based on the time slot boundary respectively

[0288] For example, as shown by reference numeral 650 in Figure 6 when the SPS PDSCH is allocated in time slots k and k+1, the UE determines that the SPS PDSCH is divided into SPS PDSCH 652 and SPS PDSCH 654 and is repeatedly received. In addition, the UE transmits only one HARQ-ACK information based on the last SPS PDSCH 654 for this.

[0289] - Method 10-3: Transmit and receive only the corresponding part of the SPS PDSCH in the time slot before the time slot boundary

[0290] For example, as shown by reference numeral 650 in Figure 6As shown by reference numeral 650, when the SPS PDSCH is allocated in time slot k and time slot k+1, the UE determines that a valid SPS PDSCH is allocated, and receives the SPS PDSCH only for SPS PDSCH 652. That is, the UE does not transmit or receive SPS PDSCH 654. In addition, the UE transmits only one HARQ-ACK message based on SPS PDSCH 652.

[0291] - Method 10-4: Transmit and receive the corresponding parts of the SPS PDSCH only in time slots that cross the time slot boundary

[0292] For example, when Figure 6 as shown by reference numeral 650, when the SPS PDSCH is allocated in time slot k and time slot k+1, the UE determines that a valid SPS PDSCH is allocated, and receives the SPS PDSCH only for SPS PDSCH 654. That is, the UE does not transmit or receive SPS PDSCH 652. In addition, the UE transmits only one HARQ-ACK message based on SPS PDSCH 654.

[0293] Figure 11 The operations of the UE are shown, which show the HARQ-ACK information transmission method for SPS release in the case of activating two or more DL SPSs.

[0294] When the UE can operate two or more active DL SPSs in one cell / one BWP, the BS can configure two or more DL SPSs in one UE. The reason for supporting the configuration of two or more DL SPSs is that when the UE supports various services, each service may have different MCS or time / frequency resource allocations or periods, so it is beneficial to configure DL SPSs suitable for each purpose.

[0295] The UE receives the following higher signal configuration information for the DL SPS.

[0296] - Period: DL SPS transmission period

[0297] - nrofHARQ-Processes: Number of HARQ processes configured for the DL SPS

[0298] - n1PUCCH-AN: HARQ resource configuration information for the DL SPS

[0299] - mcs-table: MCS table configuration information applied to the DL SPS

[0300] - SPS index: SPS index configured in one cell / one BWP

[0301] In the higher signal configuration information, the SPS index can be used to indicate which SPS is indicated by the DCI (L1 signaling) that provides SPS activation or deactivation. Specifically, in the case where two SPSs are configured by the higher signal in a cell / a BWP, the UE requires index information that indicates which of the two SPSs in the index information is indicated by the DCI that indicates SPS activation. For example, the HARQ process number field in the DCI that indicates SPS activation or deactivation can indicate a specific SPS index, and activation or deactivation is possible through this index. Specifically, when the DCI including the CRC scrambled by the CG-RNTI includes the following information shown in [Table 9] and the new data indicator (NDI) field of the corresponding DCI indicates 0, the UE determines that a specific pre-activated SPS PDSCH release (deactivation) is indicated.

[0302] [Table 9]

[0303] DCI Format 0_0 DCI Format 1_0 HARQ Process Number SPS Index SPS Index Redundancy Version Set to "00" Set to "00" Modulation and Coding Scheme Set to all "1" Set to all "1" Frequency Domain Resource Allocation Set to all "1" Set to all "1"

[0304] In the above [Table 9], one HARQ process number can indicate one SPS index or multiple SPS indexes. One or more SPS indexes can be indicated by another DCI field (time resource field, frequency resource field, MCS, RV, PDSCH-to-HARQ timing field) and the HARQ process number field. Fundamentally, one SPS can be activated or deactivated by one DCI. The position of the type 1 HARQ-ACK codebook of the HARQ-ACK information of the DCI used to indicate the SPS PDSCH release is the same as the position of the type 1 HARQ-ACK codebook corresponding to the reception position of the corresponding SPS PDSCH. When the position of the HARQ-ACK codebook corresponding to the candidate SPS PDSCH reception within a time slot is k1, the position of the HARQ-ACK codebook of the DCI used to indicate the release of the corresponding SPS PDSCH is also k1. Therefore, when the DCI indicating the SPS PDSCH release is transmitted in time slot k, the UE does not expect to receive the scheduling of the PDSCH corresponding to the HARQ-ACK codebook position k1 in time slot k, and when this situation occurs, this situation is regarded as an error situation.

[0305] In [Table 9], DCI formats 0_0 and 1_0 are described as examples, but [Table 9] can be applied to DCI formats 0_1 and 1_1 and extended to and fully applied to DCI formats 0_x and 1_x. The UE receives the SPS PDSCH higher signal and the DCI indicating the activation of the SPS PDSCH through the said operation, so as to simultaneously operate one or more SPS PDSCHs in one cell / one BWP in operation 1100. Thereafter, in operation 1102, the UE periodically receives the activated SPS PDSCH within one cell / one BWP and sends the corresponding HARQ-ACK information. The UE determines the HARQ-ACK information corresponding to the SPS PDSCH based on the slot interval information of the PDSCH-to-HARQ-ACK timing included in the activated DCI information and the n1PUCCH-AN information included in the SPS higher configuration information, through the accurate time and frequency information within the corresponding slot and the PUCCH format information. When the PDSCH-to-HARQ-ACK timing field is not included in the DCI information, the UE assumes that a value preconfigured by the higher signal is the default value and determines that the corresponding value is applied.

[0306] In the case where a type 1 HARQ-ACK codebook is configured, when the UE receives the DCI indicating the deactivation of an SPS PDSCH in operation 1104, the UE inserts the position of the HARQ-ACK codebook of the HARQ-ACK information for the corresponding DCI into the position of the HARQ-ACK codebook corresponding to the reception of the corresponding SPS PDSCH and sends the HARQ-ACK information. When the deactivation of two or more SPS PDSCHs is indicated by one DCI, it may be a problem for the UE to determine the position of the HARQ-ACK codebook for inserting the HARQ-ACK information for the corresponding DCI to send. To solve this problem, in operation 1106, the UE sends HARQ-ACK through at least one of the following methods.

[0307] * Method A-1: Lowest index (or highest index)

[0308] When two or more SPS PDSCHs are activated by a DCI indicating deactivation, the method includes the HARQ-ACK information corresponding to the DCI indicating deactivation in the HARQ-ACK codebook position corresponding to the SPS PDACH reception with the lowest value (or highest value or middle value) in the index having the corresponding SPS PDSCH. For example, when SPS PDSCH index 1, SPS PDSCH index 4, and SPS PDSCH index 5 are deactivated simultaneously by a DCI, the UE inserts the HARQ-ACK information for the DCI into the HARQ-ACK codebook position corresponding to SPS PDSCH index 1 (or 5) and sends the HARQ-ACK information.

[0309] *Method A-2: Earliest HARQ-ACK codebook timing (Latest HARQ-ACK codebook timing)

[0310] When two or more SPS PDSCHs are deactivated by a DCI indicating deactivation, the method includes the HARQ-ACK information corresponding to the DCI indicating deactivation in the earliest (or latest) HARQ-ACK codebook among the HARQ-ACK codebook positions of the corresponding SPS PDSCHs. For example, in the case where SPS PDSCH index 1, SPS PDSCH index 4, and SPS PDSCH index 5 are deactivated simultaneously by a DCI, when the HARQ-ACK codebook position corresponding to the PDSCH reception of SPS PDSCH index 1 is k1, the HARQ-ACK codebook position corresponding to the PDSCH reception of SPS PDSCH index 2 is k2, the HARQ-ACK codebook position corresponding to the PDSCH reception of SPS PDSCH index 3 is k3, and k1 < k2 < k3, the UE inserts the HARQ-ACK information corresponding to the DCI into k1 (or k3) and sends the HARQ-ACK information. When the HARQ-ACK codebook positions for the PDSCH receptions of two or more SPS PDSCHs are the same, the UE treats them as one and performs the operation.

[0311] *Method a-3: All HARQ-ACK codebook timings

[0312] When two or more SPS PDSCHs are deactivated by a DCI indicating deactivation, the method includes the HARQ-ACK information for the DCI in all HARQ-ACK codebook positions and transmits the HARQ-ACK information, rather than selecting the HARQ-ACK codebook positions according to method a-1 or a-2. For example, when SPS PDSCH index 1, SPS PDSCH index 4, and SPS PDSCH index 5 are deactivated simultaneously by a DCI, the UE inserts the HARQ-ACK information for the DCI into the HARQ-ACK codebook positions corresponding to SPS PDSCH indices 1, 4, and 5 and transmits the HARQ-ACK information. When two or more HARQ-ACK codebook positions in the SPS PDSCH are the same, the UE treats them as one and transmits the HARQ-ACK information. In another example, in the case where SPS PDSCH index 1, SPS PDSCH index 4, and SPS PDSCH index 5 are deactivated simultaneously by a DCI, when the PDSCH reception corresponding to SPS PDSCH index 1 has a HARQ-ACK codebook position of k1, the PDSCH reception corresponding to SPS PDSCH index 2 has a HARQ-ACK codebook position of k2, the PDSCH reception corresponding to SPS PDSCH index 3 has a HARQ-ACK codebook position of k3, and k1 < k2 < k3, the UE inserts the HARQ-ACK information corresponding to the DCI into k1, k2, and k3 and transmits it. When the HARQ-ACK codebook positions for the PDSCH receptions of two or more SPS PDSCHs are the same, the UE treats them as one and performs the operation.

[0313] *Method a-4: gNB Configuration

[0314] This method means that the BS first determines methods a-1 to a-3 through a higher layer signal. Second, the BS can directly determine the HARQ-ACK codebook positions through a higher layer signal or an L1 signal and methods a-1 to a-3. At this time, when a DCI deactivates two or more SPS PDSCHs, the HARQ-ACK codebook positions that can be determined by the BS can be determined by a higher layer or L1 signal within the available HARQ-ACK codebook position candidates of the corresponding SPS PDSCH, or the HARQ-ACK codebook positions can be determined by a higher layer or L1 signal regardless of this.

[0315] When receiving a DCI indicating the release or deactivation of one or more SPS PDSCHs, the UE does not expect the HARQ-ACK codebook location to which the HARQ-ACK information for the corresponding DCI is to be sent to be the same as the HARQ-ACK codebook location to which the HARQ-ACK information for the PDSCH is scheduled by other DCIs, and when receiving such a scheduling, considers the scheduling as an error situation and performs a random operation.

[0316] Figure 12 FIG. is a block diagram showing grant-free operation in a case where one UE is connected to two or more transmission and reception points (TRPs).

[0317] In operation 1200, the UE may send data to and receive data from multiple TRPs. Here, the term "TRP" may be used interchangeably with the term "base station". In such a case, the UE receives a signal indicating grant-free activation from one or more TRPs in operation 1202. At this time, the signal may be a higher layer signal or an L1 signal. Thereafter, in operation 1204, after receiving the signal indicating activation information, the UE sends data to or receives data from one or more TRPs in the grant-free resources. In addition, the UE may receive the configuration of one or more grant-free resources within one cell or one BWP. Thereafter, in operation 1206, the UE receives a signal indicating grant-free deactivation / release from one or more TRPs. At this time, the signal may be a higher layer signal or an L1 signal. In operation 1208, the UE sends a response signal to the signal. For example, when the grant-free is SPS, the signal is a DCI, and in this case, the UE sends HARQ-ACK information for the DCI. In another example, when the grant-free is configured grant type 2, the signal is a DCI, and in this case, the UE sends confirmation information to the TRP through a MAC CE as response information to the DCI.

[0318] Grant-free operations mainly include configured grant type 1 and configured grant type 2 in the uplink and semi-persistent scheduling (SPS) in the downlink. In configured grant type 1, the configured grant resources are configured, activated, and deactivated through higher layer signals, and some resource configuration information is sent through higher layer signals. The remaining configured grant resources are configured, activated, and deactivated through DCIs (L1 signals) in configured grant type 2. In the corresponding descriptions, they are all expressed as grant-free. In a case where there may be two or more grant-free configurations within one cell or one BWP, when the UE can send data to and receive data from two or more TRPs, one grant-free resource is associated with one TRP and allows data transmission and reception. For example, when configuring grant-free resource A, the UE determines that the corresponding grant-free resource is associated with TRP1 and receives or sends data to TRP1 in the periodic grant-free resources.

[0319] Specifically, since the configuration, activation, or deactivation of the configured grant resources in configured grant type 1 is indicated only by a higher signal rather than an L1 signal, the higher signal information may include information notifying the TRP from which the corresponding configured grant is sent. For example, in the higher information for the configured grant type, the following parameters may exist.

[0320] * TRP index (or spatial domain information): TRP information associated with the configured grant

[0321] The number of TRPs associated with an on-configured grant can be one or more. Specifically, when the number of TRPs associated with the configured grant is plural, the situation can be subdivided into the following cases.

[0322] * Case B-1: A specific configured grant resource is associated with different TRPs. For example, a configured grant resource is configured periodically, and when the UE is connected to two TRPs, starting from the time point when the configured grant is activated, the odd-numbered configured grants can be associated with TRP1, and the even-numbered configured grants can be associated with TRP2. Generally, the associated TRP for each specific configured grant can be determined by the equation "configured grant index" mod "TRP number" = "TRP index".

[0323] * Case b-2: Two or more TRPs are associated with each of all the configured grant resources. The UE can send data to multiple TRPs for each configured grant occasion.

[0324] * Case b-3: Regardless of the configured grant index, a transmission period is determined for each TRP, so a specific configured grant can be associated with one TRP, and another configured grant can be associated with multiple TRPs. For example, in the case where the UE is connected to two TRPs, when TRP 1 is associated with all the configured grant resources and TRP 2 is associated with the even-numbered configured grant resources, if data is generated, the UE sends data only to TRP 1 in the odd-numbered configured grant resources, and if data is generated, it sends data to TRP 1 and TRP 2 in the even-numbered configured grant resources.

[0325] The above cases can be applied to all grant-free operations including SPS. The information indicating that one grant-free resource is associated with multiple TRPs can be configured by a higher signal or an L1 signal. In SPS, after receiving the configuration information and activation information of configured grant type 1, if data is generated, the UE sends data in the configured grant resources configured for the TRP indicated by the TRP index without separate authorization.

[0326] In configured grant type 2, some information is sent via a higher signal, and the remaining configuration information, activation, and deactivation are indicated via an L1 signal. When there is TRP index information in the higher signal, the UE receives an L1 signal indicating the activation of configured grant type 2 according to the corresponding information. Then, when there is data to be sent to the TRP indicated by the TRP index provided by the corresponding higher configuration information via the configured grant resources, the corresponding data is sent without a separate grant. On the other hand, when there is no information about the TRP index in the higher configuration information, the UE implicitly determines the TRP to which data is sent in the resources configured by the configured grant based on the TRP associated with the CORESET in which the DCI indicating the activation of configured grant type 2 is sent. For example, when the CORESET for sending the DCI indicating the activation of configured grant type 2 is sent from TRP 1 and data is generated for the corresponding activated configured grant resources, the UE sends the corresponding data to TRP 1 without a separate grant. The TRP for sending the DCI indicating the deactivation of configured grant type 2 can be determined by at least one of two methods.

[0327] * Method b-1: The release of the configured grant resources associated with TRP1 can be indicated only by the DCI sent in the CORESET of TRP1. When a DCI supports two or more configured grant resources at the same time, according to this method, all of the two or more configured grants should be associated with TRP 1.

[0328] * Method b-2: Different from Method 1, the DCI sent in the CORESET associated with another TRP other than TRP1 can also indicate the release of the corresponding configured grant. When a DCI supports two or more configured grant resources at the same time, according to this method, the two or more configured grants can be associated with different TRPs.

[0329] In SPS, the detailed operations are mainly similar to configuring grant type 2, and the difference lies only in that the UE receives data of the activated SPS resource and reports its HARQ-ACK information. When the corresponding SPS resource is associated with TRP 1, the UE sends the HARQ-ACK information of the data received through the corresponding SPS resource to TRP 1. When the SPS resource is associated with two or more TRPs, the TRP to which the UE sends the HARQ-ACK information can be determined according to the above situation. When a specific SRS resource is received from TRP1 in an SPS configuration, the UE sends the HARQ-ACK information of the PDSCH received from the corresponding SPS to TRP 1. When a specific SPS resource is received from TRP 1 and TRP 2 in an SPS configuration, the UE sends the HARQ-ACK information of the PDSCH received from the SPS to TRP 1 or TRP 2 through higher signal configuration or L1 signal indication. Alternatively, when a specific SPS resource is received from TRP 1 and TRP 2 in an SPS configuration, the UE sends the HARQ-ACK information of the PDSCH received from the SPS to TRP 1 with the lowest index (or TRP 1 when TRP 1 is the primary TRP).

[0330] In another example, in the case where the indicated activated DCI is sent to the CORSET associated with TPR 1 in grant type 2 or SPS, the TRP associated with the corresponding grant type 2 or SPS can sufficiently be another TRP rather than TPR 1. Specifically, this operation can be performed when the UE predetermines the TRP association information for grant type 2 or SPS through higher signals. Alternatively, a field directly indicating the TRP information can be added to the indicated activated DCI information, or the TRP information can be indirectly indicated using the HARQ process number or RV value in the DCI.

[0331] In another example, when different grant-free resources associated with one TRP overlap, the UE shall select one of them and send or receive data through this grant-free resource. At this time, the selection method can be implemented by the UE, or in the grant-free resource, the transmission priority value can be configured through higher signals or indicated by L1 signals, and the UE can send or receive data through the grant-free resource with a high priority based on the corresponding priority value. When different grant-free resources associated with different TRPs overlap, the UE can send or receive data for the grant-grant-free resource without applying the selection method.

[0332] Figure 13The DL SRS reception operation of the UE in the case where two or more DL SPSs overlap in time is shown. Although this description is for DL SPS reception, this description can be equally applied to UL SPS. In this case, the configuration information transmission and activation of DCI are still sent from the BS to the UE, but the operations related to TB reception in the case of overlap can be performed by the BS instead of the UE.

[0333] DL SPS is described in the present disclosure, referring to Section 10.2 of 3GPP standard TS38.213, Section 5.3 of TS38.321, and Section 6.3.2 of TS38.331. In Figure 13 , the UE can receive two different DL SPS higher signal configuration information within an activated BWP and activate the information. In Rel-16 NR, up to 8 DL SPS configurations can be made within a BWP. The present invention is not limited thereto, and can be applied to 8 or more DL SPS configurations within a BWP. Different DL SPS PDSCHs (hereinafter referred to as DL SPS) can be identified by index information pre-configured / indicated by a higher signal or an L1 signal. For example, the index information can be explicitly included in the configuration information sent by the higher signal. The configuration information can include at least one of the periodicity of the DL SPS configuration, nrofHARQ-ProcessesForPDSCH, n1PUCCH-AN, and mcs-Table information. In addition, the index information for identifying the DL SPS can be included. In another example, the index information can be included in the control information sent by the higher signal and / or the L1 signal. In another example, the index information can be implicitly configured. The index information can be configured to increase sequentially in the order of the DL SPS configuration information included in the configuration information sent by the higher signal. In another example, the index information can be configured to increase sequentially in the order of activation of the control information sent by the L1 signal after the higher configuration. When multiple DL SPSs are activated in the control information, the index information can be configured to increase sequentially in the order of the DL SPSs included in the higher signal.

[0334] In addition, two or more different activated DL SPS resources may partially overlap in terms of time resources. Here, activation means the state configured by a higher signal, or the state of actual operation configured by an L1 message after configuration. Alternatively, activation may refer to both the former and the latter. In addition, time resources may be configured or allocated to information included in a higher signal, or the time points for sending information included in an L1 message or an L1 message may be used to configure or allocate time resources. For example, when the transmission periods of two or more DL SPS resources are different, the time resources of different DL SPS resources may overlap in a specific time interval or time slot, as Figure 13 shown. Figure 13 Reference numeral 1301 in Figure 13 shows a case where three different DLSPS resources overlap in terms of time resources. When the UE can only receive one DL SPS resource at a time, the UE only receives one of the overlapping DL SPS resources. Therefore, there may be a method for the UE to randomly select one of the overlapping DL SPS resources, but a method for selecting a DL SPS resource predefined between the BS and the UE is required because the BS does not know which DL SPS in the overlapping DL SPS the UE has received and which HARQ-ACK information has been sent therefor. To solve this problem, at least one or a combination of the following methods may be applied.

[0335] * Method 13-1: A method of indicating prioritization of the DL SPS resource with the lowest index among the time-overlapping DL SPS resources. For example, when a DL SPS resource with an index value of 1 and a DL SPS resource with an index value of 3 overlap with each other, the UE receives a transport block (TB) sent from the BS through the DL SPS resource with an index value of 1 and does not receive the DL SPS resource with an index value of 3. Therefore, the UE demodulates / decodes the TB received through the DL SPS resource with an index value of 1 and sends HARQ-ACK information through the PUCCH resource preconfigured for the DL SPS resource. Even when three or more DLSPS overlap in time, the UE receives the TB sent through the DL SPS resource with the lowest index value. In another example, in the case of time overlap, the UE does not receive the TB sent through a DLSPS resource other than the DL SPS resource with the lowest index value, or may operate based on the assumption that the BS does not send a TB through the corresponding resource. For example, a demodulation / decoding operation may not be performed in the corresponding DL SPS resource. In another example, feedback information for the corresponding DL SPS resource, such as ACK / NACK information, may not be sent.

[0336] *Method 13-2: A method for indicating prioritization of DL SPS resources with higher indices among time-overlapped DL SPS resources. For example, when a DL SPS resource with an index value of 1 and a DL SPS resource with an index value of 3 overlap with each other, the UE receives a transport block (TB) sent from the BS via the DL SPS resource with an index value of 3 and does not receive the DL SPS resource with an index value of 1. Therefore, the UE demodulates / decodes the TB received via the DL SPS resource with an index value of 3 and sends HARQ-ACK information via the PUCCH resource pre-configured for the DL SPS resource. Even when three or more DL SPSs overlap in time, the UE receives the TB sent via the DL SPS resource with the highest index value. In another example, in the case of time overlap, the UE does not receive the TB sent via a DL SPS resource other than the DL SPS resource with the highest index value, or may operate based on the assumption that the BS does not send a TB via the corresponding resource. For example, demodulation / decoding operations may not be performed in the corresponding DL SPS resource. In another example, feedback information such as ACK / NACK information for the corresponding DL SPS resource may not be sent.

[0337] *Method 13-3: A method for indicating prioritization of DL SPS resources in chronological order in addition to Method 13-1 (or Method 13-2). In other words, it is a method for adding an exception to the DL SPS resource determined to have the lowest priority when determining resource priority by index comparison based on overlap with other resources. At this time, the determination of whether a resource is prioritized is performed in chronological order (or reverse chronological order within a specific time domain). The specific time domain may be a specific transmission interval or time slot. Specifically, it is determined whether the DL SPS resource overlaps with another DL SPS resource in time. When they overlap, it is assumed that no reception operation is performed in the DL SPS resource with lower priority or the BS does not send a TB. In addition, the DL SPS with lower priority is excluded from the operation of determining whether there is an overlap in the future. Figure 13Reference label 1301 shows a case where three DL SPSs overlap differently. When the index value configured in DL SPS 1300 is 1, the index value configured in DL SPS 1302 is 3, and the index value configured in DL SPS 1304 is 5, according to method 13-1, since DL SPS 1304 has a higher index value than DL SPS 1302, the UE does not receive DL SPS 1304, and since DL SPS 1302 has a higher index value than DL SPS 1300, the UE does not receive DL SPS 1302. Therefore, according to method 13-1, even if DL SPS 1300 and DL SPS 1304 do not overlap in time in Figure 13 reference label 1301, the UE may only receive DL SPS 1300. In the case where a lower index value has a higher priority as shown in method 13-1, the operation of determining the priority of DL SPS resources only by configuring the resources and index information of DL SPS and having the UE receive the DL SPS with a higher priority may be inefficient. In method 13-3, to solve this problem, the UE determines whether the DL SPS overlaps in time with other valid DL SPSs at the time point when the DL SPS is actually received, and when the DL SPSs overlap, excludes the DL SPS(s) with a lower priority from the determination of whether the DL SPSs overlap in time and does not receive the DL SPS(s) with a lower priority. Thereafter, the UE performs an operation of determining whether the DL SPSs that are not excluded in the determination of whether the DL SPSs overlap in time overlap. The scheme shown in [Table 10] below can be applied.

[0338] [Table 10]

[0339]

[0340] When through the above method in Figure 13In reference numeral 1301, when the index value configured in DL SSP 1300 is 1, the index value configured in DL SPS 1302 is 3, and the index value configured in DL SPS 1304 is 5, the UE determines that all DL SPS resources 1300, 1302, and 1304 activated in a specific transmission interval or time slot are valid DL SPS resources, similar to step 1. Similar to step 2, the UE can determine whether there are other overlapping (multiple) DL SPSs before receiving the DL SPS 1300 scheduled first in chronological order. Similar to step 4, since DL SPS 1300 overlaps with DL SPS 1302, the DL SPS 1300 with a higher priority (with an index value of 1) is received, and the DL SPS 1302 with a lower priority (with an index value of 3) is not received. DL SPS 1300 and DL SPS 1302 are determined to be invalid DL SPSs, and the UE moves to step 1 and identifies the next first DL SPS 1304. Determine whether there are valid DL SPS resources overlapping with DL SPS 1304 in step 2. Since DL SPS 1302 is no longer a valid DL SPS resource, the UE determines that there are no overlapping resources and moves to step 3. In addition, the UE receives DL SPS 1304. Method 13-2 can be applied in the same way. In addition, [Table 10] applies this operation considering the chronological order of DL SPS, but an inverse method can be used.

[0341] *Method 13-4: In addition to Method 13-1 (or Method 13-2), the time resources for allocating DL SPS are also considered to determine the priority. In other words, it is a method of adding an exception to the DL SPS resource determined to have the lowest priority in the priority determination when the resource priority is determined by index comparison based on the overlap with other resources. At this time, the determination of the priority is sequentially performed from the DL SPS with the lowest index (or the DL SPS with the highest index) in a specific time domain. The specific time domain can be a specific transmission interval or time slot. Specifically, it is determined whether the DL SSP resource overlaps with another DL SPS in ascending order of index in a specific time domain. When they overlap, it is assumed that the reception operation is not performed in the DL SPS resource with a lower priority or the BS does not transmit the TB. In addition, the DL SPS with a lower priority is excluded from the operation of determining whether there is an overlap in the future. Referring to Method 13-3, when in Figure 13In reference label 1301, when the index value configured in DL SPS 1300 is 5, the index value configured in DL SPS 1302 is 3, and the index value configured in DL SPS 1304 is 1, even if DL SPS 1302 overlaps with DL SPS 1303 and has a low priority, the UE may not receive DL SPS 1300 and may receive DL SPS 1302. Therefore, the chronological order may be problematic. Therefore, the UE determines to receive the DL SPS (A) with the highest priority except for the DL SPS that overlaps with at least one symbol of the DL SPS (A) with the highest priority in terms of time resources, considering the time resource regions allocated to all DL SPSs activated in a specific transmission period or time slot. In addition, the UE determines to receive the DL SPS (B) except for the DL SPS that overlaps with at least one symbol of the DL SPS (B) with the highest priority among the remaining DL SPS resources that have not been excluded in terms of time resources. The UE continues this process until there are no DL SPSs that are not determined to be received or have not been excluded. The UE receives the determined DL SPSs determined to be received in a specific interval or time slot and sends HARQ-ACK information to the BS for this purpose. Alternatively, the method shown in [Table 11] below can be applied.

[0342] [Table 11]

[0343]

[0344] In Figure 13 Case 1311, DL SPSs 1310, 1312, 1314, 1316, 1318, and 1320 with 6 different indexes are activated and scheduled in one time slot. According to method 13-4, when the DL SPS with the lowest index value has the highest priority, the UE receives DL SPS 1310 with an index of 1 and does not receive DL SPS 1318 with an index of 6 that overlaps with DL SPS 1310. The UE receives DL SPS 1316 with the next highest priority and an index of 2 and does not receive DL SPS 1314 with an index of 3 and DL SPS 1320 with an index of 4 that overlap with DL SPS 1316. The UE receives DL SPS 1312 with the next highest priority and an index of 5. Therefore, the UE finally receives DL SPSs 1310, 1312, and 1316, demodulates / decodes the DL SPSs, and then reports HARQ-ACK information to the BS for this purpose.

[0345] *Method 13-5: Determine the priority according to Method 13-3 or Method 13-4 by considering the symbol direction information within a specific transmission interval or time slot in TDD. The symbol direction is one of downlink, uplink, and flexible link. In TDD, for the method indicating the symbol direction information, refer to Section 11.1 of 3GPP standard TS 38.213. Basically, the UE receives the DL SPS only when all symbols in the resource region allocated for the DL SPS are indicated as downlink (DL) by a higher or L1 signal. Alternatively, when at least one symbol in the resource to which the DL SPS is allocated is configured / indicated as an uplink symbol or a flexible symbol by a higher signal or an L1 signal, the UE does not receive the DL SPS. Therefore, Method 13-3 or Method 13-4 can be considered in the same way. In Method 13-3, the following conditions can be added to [Table 10].

[0346] - The DL SPS transmission resource is considered a valid DL SPS resource only when all DL SPS transmission resources are indicated as downlink by a higher signal or an L1 signal. Alternatively, a DL SPS resource having at least one symbol overlapping with a symbol configured / indicated as an uplink symbol or a flexible symbol by a higher signal or an L1 signal is considered an invalid resource, and the UE does not receive the DL SPS resource. In Figure 13 reference label 1301 of, the DL SPS 1304 overlaps with the symbol 1306 configured / indicated as an uplink symbol or a flexible symbol by a higher signal or an L1 signal, so the UE does not receive the DL SPS 1304.

[0347] In other words, before executing Method 13-3, determine whether each DL SPS resource overlaps with an uplink symbol or a flexible symbol. The UE operates based on the assumption that reception is not performed in the overlapping DL SPS resources and the BS does not transmit the TB. Thereafter, after excluding the corresponding DL SPS from the priority determination, Method 13-3 is executed.

[0348] In Method 13-4, the following conditions can be added to [Table 11].

[0349] - The UE determines not to receive a DL SPS resource having at least one symbol overlapping with a symbol configured / indicated as an uplink symbol or a flexible symbol by a higher signal or an L1 signal. In Figure 13In reference numeral 1311, DL SPSs 1316 and 1320 overlap with symbol 1319 configured / indicated by a higher or L1 signal as an uplink symbol or a flexible symbol, so the UE does not receive DL SPSs 1316 and 132. Therefore, in this case, the UE receives DL SPSs 1310, 1312, and 1314 according to method 13-4 and reports HARQ-ACK information therefor. According to methods 13-4 and 13-5, the UE does not receive DL SPSs 1318, 1316, and 1320.

[0350] In other words, before performing method 13-4, it is determined whether each DL SPS resource overlaps with an uplink symbol or a flexible symbol. The UE operates based on the assumption that reception is not performed in the overlapping DL SPS resources or the BS does not transmit a TB. Thereafter, after excluding the corresponding DL SPS from the priority determination, method 13-4 is performed.

[0351] Figure 14 is a block diagram showing the reception operation of the UE in the case where two or more DL SPSs overlap in time.

[0352] In Figure 14 the UE pre-receives DL SPS configuration information through a higher signal (RRC). At this time, the UE may also receive index information for the DL SPS or may configure the index information indirectly. In operation 1400, the DL SPS information highly configured by DCI including a CRC scrambled by CS-RNTI is activated individually or in a group. Here, the DL SPS can be activated by separately receiving the configuration information of the higher signal, in which case the reception of the DCI including the CRC scrambled by CS-RNTI can be omitted. The UE periodically receives information about the DL SPS in the pre-configured resources. In operation 1402, when two or more DL SPSs with different indexes overlap in time, the UE considers or performs at least one of the methods (methods 13-1 to 13-5) described in reference Figure 13 Therefore, in operation 1404, the UE only receives the DL SPS with the highest priority (e.g., the lowest index value) and reports HARQ-ACK information. The UE does not receive other DL SPSs with low priority (e.g., high index values), and the UE does not report HARQ-ACK information and does not even generate HARQ-ACK information itself. When the UE receives two or more DL SPS resources in one time slot, the UE can use one of these two methods to configure the HARQ-ACK codebook.

[0353] *Method 14-1: Map in sequence from the HARQ-ACK information of the DL SPS resource with the lowest index. For example, when the UE receives the DL SPS with index 1, the DL SPS with index 3, and the DL SPS with index 5 in a time slot, the UE configures the HARQ-ACK codebook as [HARQ-ACK information of DL SPS index 1, HARQ-ACK information of DL SPS index 3, HARQ-ACK information of DL SPS index 5].

[0354] *Method 14-2: Consider the time resource region of the DL SPS actually received by the UE in the time slot, and map in sequence from the HARQ-ACK information of the first received DL SPS. For example, when the UE receives the DL SPS with index 1 in symbols 1 to 3, the DL SPS with index 3 in symbols 10 to 11, and the DL SPS with index 5 in symbols 4 to 6, the UE configures the HARQ-ACK codebook as [HARQ-ACK information of DL SPS index 1, HARQ-ACK information of DL SPS index 5, HARQ-ACK information of DL SPS index 3] according to the time resources where the SPS PDSCH is actually transmitted and received. Alternatively, the UE uses the applied time domain resource allocation (TDRA) value to activate the DL SPS. That is, for the DL SPS received in a time slot, the UE uses the TDRA value of the corresponding DL SPS to generate the HARQ-ACK codebook with reference to 9.1.2 of 3GPP standard TS 38.213.

[0355] Figure 15 Illustrates HARQ-ACK transmission / reception for DL SPS reception according to an embodiment.

[0356] In the case of receiving multiple DL SPSs in a BWP, the UE may report the HARQ-ACK information for receiving multiple DL SPSs. The higher configuration information of the DL SPS may include at least the information shown in [Table 12] below.

[0357] [Table 12]

[0358]

[0359]

[0360] The UE may receive one or more SPSs within a BWP through the higher signal configuration information in [Table 12] above. Other SPS configuration information is included in the DCI for activating the corresponding SPS. The DCI includes a CRC scrambled by the CS-RNTI. Figure 15This shows a situation where the UE receives two DL SPSs in the time slot structure shown by reference numeral 1500 and transmits HARQ-ACK information including one or two DL SPSs in a PUCCH or PUSCH at reference numeral 1503. Reference numeral 1501 is a DL SPS with a value of index 0, and reference numeral 1502 is a DL SPS with a value of index 1. At reference numeral 1503, HARQ-ACK information for the DL SPSs received at reference numerals 1501 and 1502 is transmitted. The DL SPS at reference numeral 1501 has a transmission period of two time slots and a k1 of two time slots. The DL SPS at reference numeral 1502 has a turn-on of one time slot and a transmission period of k1. k1 represents the time slot offset value between the received DL SPS and the transmitted HARQ-ACK. k1 is commonly applied to all DL SPSs that are periodically transmitted and received in a piece of DL SPS configuration information. Therefore, reference numeral 1523 includes HARQ-ACK information for a DLSPS1512. Similarly, HARQ-ACK 1525, 1527, 1529, and 1531 only include HARQ-ACK information for one DL SPS. Reference numeral 1524 includes HARQ-ACK information for two DL SPSs 1504 and 1513. Similarly, HARQ-ACK 1524, 1526, 1528, and 1530 include HARQ-ACK information for two DL SPSs. In Rel-15 NR, only one DL SPS configuration is possible within a cell associated with a PUCCH group, so only one bit is required for HARQ-ACK information dedicated to DL SPSs. However, multiple DL SPS configurations may exist within a cell / BWP, and the UE needs a method to generate HARQ-ACK codebook information for DL SPSs when it can receive multiple DL SPSs. The information required to configure the HARQ-ACK codebook mainly includes DL SPS index information, cell index information for transmitting and receiving DL SPSs, and time slot index information for transmitting and receiving DL SPSs. With such information, the HARQ-ACK codebook information can be configured in the case of only receiving DL SPSs in [Pseudo-code 15-1] below.

[0361] [Pseudo-code 15-1]

[0362]

[0363]

[0364] In [Pseudo-code 15-1], the candidate DL SPSs for configuring the HARQ-ACK codebook are the DL SPSs transmitted in DL time slots and flexible time slots. A DL time slot means that the symbols to which the transmitted and received DL SPSs belong are pre-indicated by a higher signal as downlink symbols. A flexible time slot may mean that the symbols of the transmitted and received DL SPSs are pre-indicated by a higher signal as flexible symbols, or at least one of the symbols of the transmitted and received DL SPSs is pre-indicated by a higher signal as a flexible symbol. The UE receives the DL SPSs transmitted and received in DL time slots, but the UE only receives the DL SPSs transmitted and received in flexible time slots when the symbols for transmitting and receiving the DL SPSs are indicated as downlink symbols by the slot format indicator (SFI) transmitted and received through the L1 signal. On the other hand, when the symbols for transmitting and receiving the DL SPSs are indicated as flexible symbols or uplink symbols by the SFI, the UE does not receive the corresponding DL SPS. Therefore, in this case, the UE does not receive the corresponding DL SPS and thus maps NACK information to the HARQ-ACK codebook position corresponding to the corresponding DL SPS. Basically, [Pseudo-code 15-1] first considers all time slots of the DL SPSs transmitted and received by one piece of HARQ-ACK information indexed for a specific DL SPS, and then considers all DL SPS indices transmitted and received in a cell in order to configure the HARQ-ACK codebook. In addition, this also applies to all cell indices. In summary, the HARQ-ACK codebook is configured in the order of the time slot index (ascending order) → cell index (ascending order) for transmitting and receiving the DL SPSs.

[0365] On the other hand, [Pseudo-code 15-2] is similar to [Pseudo-code 15-1], but when the UE does not receive the SFI monitoring configuration information, the UE does not receive the DL SPSs in flexible time slots or UL time slots and thus configures HARQ-ACK information only for the DL SPSs received in DL time slots. Therefore, the UE can always assume and use [Pseudo-code 15-1] or [Pseudo-code 15-2]. Alternatively, the UE can apply one of [Pseudo-code 15-1] or [Pseudo-code 15-2] to the HARQ-ACK information configuration according to the presence or absence of the SFI monitoring configuration. For example, the UE applies [Pseudo-code 15-1] when receiving the SFI monitoring configuration and applies [Pseudo-code 15-2] when not receiving the SFI monitoring configuration information.

[0366] Figure 15Basically, it is shown that considering an FDD system, reference numerals 1501 and 1502 are downlinks, and reference numeral 1503 is an uplink, but it can be fully applied to TDD conditions. For example, in the time slot structure 1500, when #1 is a time slot including only downlink symbols, #2 is a time slot including only flexible symbols, and #3 is a time slot including only uplink symbols, the candidate DL SPS included in the HARQ-ACK codebook 1524 transmitted in time slot #3 can vary according to whether the UE additionally performs SFI monitoring on the time slot including the flexible symbols of #2.

[0367] According to [Pseudo-code 15-1], the HARQ-ACK codebook information 1524 transmitted in time slot #3 can basically include HARQ-ACK information for the DL SPS 1504 with an SPS index value of 0 and the DL SPS 1513 with an SPS index value of 1. Since the DL SPS 1513 is transmitted and received in time slot #2 including flexible symbols, if the UE receives the SFI monitoring configuration information and the symbol used to transmit the corresponding DL SPS is indicated as at least a downlink symbol, the UE receives the DL SPS 1513. When the UE does not receive the SFI monitoring configuration information, or the UE receives the SFI monitoring configuration information, but at least one of the symbols used to transmit the DL SPS is indicated as a symbol other than the downlink symbol, or the UE fails to search for the SFI, the UE does not receive the DL SPS 1513. Therefore, when the DL SPS 1513 is received, the HARQ-ACK information according to the demodulation / decoding result of the TB included in the DL SPS 1513 is mapped to the HARQ-ACK codebook position corresponding to the DL SPS 1513, and when the DL SPS 1513 is not received, the NACK value is mapped to the HARQ-ACK codebook position corresponding to the DL SPS 1513. The PUCCH or PUSCH including the HARQ-ACK codebook information is transmitted and received at reference numeral 1524 in time slot #3.

[0368] According to [Pseudo-code 15-2], the time slot #2 for transmitting and receiving the DL SPS 1513 is not a DL time slot, so there is no HARQ-ACK codebook corresponding to the DL SPS 1513, and only the HARQ-ACK codebook information corresponding to the DL SPS 1504 is transmitted and received through the PUSCH or PUCCH in time slot #3 at reference numeral 1524.

[0369] Alternatively, instead of [Pseudo-code 15-2], the UE can use [Pseudo-code 15-3] to configure the HARQ-ACK codebook for receiving multiple DL SPSs.

[0370] [Pseudo-code 15-3]

[0371]

[0372] In Figure 15 it is considered that the corresponding DL SPS is transmitted and received while being included in different HARQ-ACK information included in a DL SPS index. That is, it is not possible to include HARQ-ACK information of two or more DLSPSs in one HARQ-ACK message. This is because the time slot (or sub-time slot including multiple symbols) offset for the transmission of the DL SPS and the HARQ-ACK information corresponding thereto is indicated as the same value. Therefore, the DL SPSs transmitted and received at different times will transmit and receive HARQ-ACK information through different PUCCHs or PUSCHs. In the case of a TDD structure in which each time slot includes a downlink time slot including downlink symbols and an uplink time slot including uplink symbols, the UE receives the DL SPS in the downlink time slot, but may not transmit HARQ-ACK information due to time slots other than the uplink time slot. Therefore, to solve this problem, when the TDD structure supports DL SPSs with a small period, the TDD should be configured to frequently alternate downlink symbols and uplink symbols to transmit the DL SPS and HARQ-ACK information. However, frequent symbol direction switching requires time (or symbols) required for the switching, thereby reducing the usage efficiency of frequency and time resources. Subsequently, Figure 16 a method for transmitting HARQ-ACK information for receiving two or more DL SPSs is proposed to solve this problem.

[0373] Figure 16 shows the transmission of HARQ-ACK information for multiple DL SPSs according to an embodiment.

[0374] In Figure 16 reference numeral 1600 is a TDD time slot structure in which, out of a total of 10 time slots, time slots #1, #2, #4, #5, #7, #8, and #9 are time slots including downlink symbols, and time slots #3, #6, and #10 are time slots including uplink symbols. Specifically, considering the RF switching time between the downlink and the uplink in the TDD structure and the transmission / reception delay between the BS and the UE, one or more symbols immediately before the uplink symbol may be flexible symbols instead of downlink symbols. Reference numeral 1601 shows the DL SPS transmission / reception information according to the SPS configuration information having one index value and has a time slot period. As a reference, the UE does not receive the DL SPS in the time slot indicated as the uplink symbol, so in Figure 16This time slot is omitted in the figure. Reference numeral 1612 indicates a case of transmitting and receiving a PUCCH or PUSCH that includes HARQ-ACK information reporting the DL SPS reception result. A PUCCH or PUSCH may include HARQ-ACK information of one or more DL SPSs. For example, PUCCH or PUSCH 169 includes HARQ-ACK information for DL SPSs 1602 and 1603, PUCCH or PUSCH 1610 includes HARQ-ACK information for DL SPSs 1604 and 1605, and PUCCH or PUSCH 1611 includes DL SPSs 1606, 1607, and 1608. As Figure 15 shown, the time slot offset value between the transmission and reception of the DL SPS and the HARQ-ACK is basically determined by the K1 value included in the DCI for activating the SPS, so all DL SPSs have different HARQ-ACK transmission time points. Therefore, as Figure 16 shown, at least one of the following methods can be performed to make the K1 values between the DL SPS and the HARQ-ACK actually different. #

[0375] * Method 16-1: Transmit the HARQ-ACK in the k1-th time slot (n + k1) after the DL SPS reception time slot (n). When at least one symbol for the HARQ-ACK information to be transmitted in the time slot n + k1 is indicated as a flexible symbol or a downlink symbol by a higher signal including the time slot format information, transmit the HARQ-ACK information of the corresponding DL SPS in the first positioning resource in the resource for transmitting the HARQ-ACK information of the DL SPS after the time slot n + k1. For example, according to Figure 16 a time slot period in, transmit and receive SPS 1601. When the time slot offset value k1 for transmitting the HARQ-ACK information of the corresponding DL SPS is one time slot, under FDD conditions, the HARQ-ACK information of the DL SPS 1602 received in time slot #1 should be transmitted in time slot #2. However, since time slot #2 is preconfigured as a downlink symbol by a higher signal, the HARQ-ACK information cannot be transmitted. Therefore, the next time slot #3 is configured as an uplink symbol, and the HARQ-ACK information is transmitted in time slot #3. The HARQ-ACK information included in the PUCCH or PUSCH transmitted in time slot #3 is for the DL SPS 1602 received in time slot #1 and the DL SPS 1603 received in time slot #2. Therefore, [Pseudo-code 16-1] can be defined in the 3GPP standard to support such a procedure.

[0376] [Pseudo-code 16-1]

[0377]

[0378]

[0379] In reference Figure 16 In the description of [Pseudo-code 16-1] of the example of, the UE determines the DL SPS transmission period based on the slot format information configured by a higher signal in a cell and determines the resource region for transmitting the actual HARQ-ACK information based on the K1 value for transmitting the HARQ-ACK information. Therefore, in Figure 16 , the HARQ-ACK information should be transmitted in all SOTs according to the scheduling, but in terms of the actual transmission, the HARQ-ACK information can be transmitted only in the PUCCH resources indicated as uplink symbols by the higher signal. Therefore, the UE determines the slot number for receiving the DL SPS for each of the actually transmitted PUCCHs. In Figure 16 , when PUCCH 1609 is the (i-2)th PUCCH, PUCCH 1610 is the (i-1)th PUCCH, and PUCCH 1611 is the ith PUCCH, according to [Pseudo-code 16-1], the candidate DL SPS included in the HARQ-ACK information transmitted in PUCCH 1611 is the DL SPS received between slot #6 and slot #9. Slot #6 is indicated as an uplink slot, so the UE does not actually receive the DL SPS. Therefore, the UE configures the HARQ-ACK codebook for the DL SPS received in slots #7 to #9 and transmits the codebook in PUCCH 1611. At this time, for PUCCH 1611, the values of m1, k1, and k can be 10, 1, and 4, respectively. In [Pseudo-code 16-1], when configuring the HARQ-ACK codebook, the DL SPS in which at least one symbol is pre-indicated as an uplink symbol by the higher signal is excluded. In addition, the UE does not receive the DL SPS in which at least one symbol is pre-indicated as a flexible symbol by the higher signal or the L1 signal, but maps the NACK information to the HARQ-ACK codebook. Alternatively, [Pseudo-code 16-2] below can be used instead of [Pseudo-code 16-1].

[0380] [Pseudo-code 16-2]

[0381]

[0382] In [Pseudo-code 16-2], when the HARQ-ACK codebook is configured, the DL SPS in which at least one symbol is pre-indicated as a flexible symbol or an uplink symbol by the higher signal is excluded.

[0383] *Method 16-2: A method for indicating the configuration or the number of DL SPS bindings. This method is available when two or more DL SPSs within the same SPS index are sent via one HARQ-ACK message. That is, the number of DL SPS bindings can be included in a higher signal or in the DCI information indicating SPS activation and sent via an L1 signal. When the UE receives the corresponding information, the UE also sends the HARQ-ACK information of the DL SPS corresponding to the number of DL SPS bindings. Therefore, regarding the number of DL SPS bindings, DL SPS candidates including uplink symbols are excluded in the time slot format structure configured by a higher signal. For example, when only time slots #1 to #6 are configured in Figure 16 , in the case where the number of DL SPS bindings is 2, the UE sends the HARQ-ACK information for the DL SPS received in time slots #1 and #2 via PUCCH 1609, and sends the HARQ-ACK information for the DL SPS received in time slots #4 and #5 via PUCCH 1610. The corresponding method is a method that makes the size of the HARQ-ACK codebook sent and received in all PUCCHs the same, and in Figure 16 , when there are time slots #1 to #10, different HARQ-ACK codebook sizes for each PUCCH cannot be supported. When at least one symbol in the PUCCH time resource including the HARQ-ACK information for the DL SPS is indicated as a downlink symbol or a flexible symbol by a higher signal or an L1 signal, the UE does not send the PUCCH. Additionally, similarly, when configuring the HARQ-ACK codebook, DL SPSs in which at least one symbol is pre-indicated as an uplink symbol by a higher signal are excluded. Furthermore, the UE does not receive a DL SPS in which at least one symbol is pre-indicated as a flexible symbol by a higher signal or an L1 signal, but maps the NACK information to the HARQ-ACK codebook.

[0384] *Method 16-3: Predesignate the PUCCH including the HARQ-ACK information. That is, in Figure 16In the example, when [0010010001] is indicated in the method of specifying PUCCH transmission time slots for transmitting HARQ-ACK information for DL SPS in units of 10 time slots by a bitmap, the UE transmits HARQ-ACK information for DL SPS in time slot #3, time slot #6, and time slot #10. Therefore, when DL SPS is received, the HARQ-ACK information for the received DL SPS is included in the PUCCH, and the PUCCH can be transmitted first after including the K1 value. When at least one symbol in the PUCCH time resource including HARQ-ACK information for DL SPS is indicated as a downlink symbol or a flexible symbol by a higher signal or an L1 signal, the UE does not transmit the PUCCH. Although it is assumed that the period of the bitmap for transmitting the PUCCH is 10 time slots in this example, the period is not limited thereto and can be configured by the BS in units of other numbers of time slots or time units. In addition, similarly, when configuring the HARQ-ACK codebook, DL SPS in which at least one symbol is pre-indicated as an uplink symbol by a higher signal is excluded. In addition, the UE does not receive DL SPS in which at least one symbol is pre-indicated as a flexible symbol by a higher signal or an L1 signal, but maps NACK information to the HARQ-ACK codebook.

[0385] In Figure 16In the case where the UE receives a PDSCH without the first DCI format and the PDSCH-to-HARQ feedback timing corresponding to a higher signal cannot be applied to the dl-DataToUL-ACK for activating the PDSCH, the UE does not multiplex the HARQ-AC information for the PDSCH onto the PUCCH or PUSCH. When the UE receives a PDSCH without the second DCI format and a value that can be applied by the corresponding PDSCH-to-HARQ feedback timing is provided, the UE multiplexes the HARQ-ACK information onto the corresponding PUCCH or PUSCH. The dl-DataToUL-ACK is an RRC signal and provides candidate values for the PDSCH-to-HARQ feedback timing, and its unit is a time slot. The PDSCH-to-HARQ feedback timing is a DCI field within the DCI format. In the case of DL SPS (i.e., a PDSCH without any DCI format), the PDSCH-to-HARQ feedback timing value follows the value indicated by the PDSCH-to-HARQ feedback timing of the DCI format for activating the SPS. The PDSCH without the first DCI format and the PDSCH without the second DCI format can have the same PDSCH-to-HARQ feedback timing. In addition, the PDSCH without the first DCI format and the PDSCH without the second DCI format have the same SPS index higher signal value. In addition, the PDSCH without the first DCI format and the PDSCH without the second DCI format have the same priority index value. The priority index value can be determined by the DCI format, a field within the DCI format, or a higher signal. For example, when the UE receives a configuration for monitoring a DCI format for scheduling two PDSCHs other than DCI format 1_0, the UE can determine the priority index value through the DCI format itself, and a field for identifying the priority index value can be added to the DCI format to indicate the priority index when the UE receives a configuration for monitoring a DCI format for scheduling one PDSCH other than DCI format 1_0. The priority index value of the SPS activated by DCI format 1_0 is 0, and the priority index value of the SPS activated by other DCI formats can be determined by the above DCI format or a field within the DCI format.

[0386] Figure 17 Shows the transmission of HARQ-ACK information for DL SPS considering the HARQ process ID according to an embodiment.

[0387] In NR, the UE supports up to 16 HARQ process IDs for each cell, and the number of HARQ processes is configured by a higher layer signal (RRC). In the 3GPP standard, it is nrofHARQ-ProcessesForPDSCH within PDSCH-ServingcellConfig, and is configured by the higher layer signal to at least one value among 2, 4, 6, 10, 12, and 16. When nrofHARQ-ProcessesForPDSCH is not configured, the UE uses 8 HARQ processes.

[0388] When DL SPS is configured, the HARQ process identifier (ID) is determined by the following equations. [Equation 17-1] is implemented when harq-procID-offset is not configured, while [Equation 17-2] is implemented when harq-procID-offset is configured.

[0389] [Equation 17-1]

[0390] HARQ Process ID = [floor(CURRENT_slot × 10 / (numberOfSlotsPerFrame × periodicity))] modulo nrofHARQ-Processes

[0391] [Equation 17-2]

[0392] HARQ Process ID = [floor(CURRENT_slot / periodicity)] modulo nrofHARQ-Processes + harq-procID-offset where CURRENT_slot = [(SFN × numberOfSlotsPerFrame) + slot number in the frame] and numberOfSlotsPerFrame refers to the number of consecutive time slots per frame

[0393] The parameters used in [Equation 17-1] and [Equation 17-2] above have the following meanings and include higher layer signal (RRC) configuration information. Each SPS index has different RRC configuration information.

[0394] - nrofHARQ-Processes: The number of configured HARQ processes for SPS;

[0395] - harq-procID-offset: The offset of the HARQ process for SPS;

[0396] -periodicity: The period of the configured downlink allocation of the SPS.

[0397] Figure 17 Reference numeral 1700 shows an example of a method for determining the HARQ process ID in DL SPS based on the same SPS index by [Equation 17-2]. In the slot structure of reference numeral 1700, slots #1, #2, #4, #5, #7, #8, and #9 are downlink slots including downlink symbols, and slots #3, #6, and #10 are uplink slots including uplink symbols. Before the uplink slot, some symbols can be configured as flexible symbols instead of downlink symbols to maintain the RF switching time and uplink / downlink frame arrangement between the BS and the UE. When a higher configuration is executed such that harq-procID-offset = 0, nrofHARQ-Processes = 3, and periodicity = 1 slot, the HARQ process ID is determined for each DL SPS as shown in [Table 13] below. In addition, in [Table 13], for ease of description, the case where the HARQ=ACK information of two or more DL DPSs is included in one PUCCH resource is considered according to the method described with reference to Figure 16 the method described.

[0398] [Table 13]

[0399] DL SPS HARQ Process ID PUCCH 1702 1 = ([floor(1 / 1)] mod 3 + 0) 1712 1703 2 = ([floor(2 / 1)] mod 3 + 0) 1712 1705 1 = ([floor(4 / 1)] mod 3 + 0) 1713 1706 2 = ([floor(5 / 1)] mod 3 + 0) 1713 1708 1 = ([floor(7 / 1)] mod 3 + 0) 1714 1709 2 = ([floor(8 / 1)] mod 3 + 0) 1714 1710 0 = ([floor(9 / 1)] mod 3 + 0) 1714

[0400] For DL SPSs with the same HARQ process ID, the UE determines a new transmission of different TBs rather than a retransmission of the same TB based on [Table 13] above. For example, when the UE receives DL SPS 1702 and then receives DL SPS 1705 with the same HARQ process ID, the UE removes the received DL SPS 1702 from the UE's buffer, stores DL SPS 1705 in the corresponding buffer, and demodulates / decodes it. When the UE reports NACK in response to DL SPS 1702, the UE may receive a retransmission schedule in DCI format for scheduling downlink data scrambled by the CS-RNTI. The DCI format has a HARQ process ID of 1, similar to DL SPS 1702, and NDI of 1. When a higher configuration is executed such that harq-procID-offset = 0, nrofHARQ-Processes = 2, and periodicity = 1 slot, the HARQ process ID is determined for each DL SPS as shown in [Table 14] below. In addition, in [Table 14], for ease of description, the case where the HARQ=ACK information of two or more DL DPSs is included in one PUCCH resource is considered according to the method described with reference to Figure 16The described method is for the case where two or more DL DPS HARQ-ACK information are included in one PUCCH resource.

[0401] [Table 14]

[0402] DL SPS HARQ Process ID PUCCH 1702 1 = ([floor(1 / 1)] mod 2 + 0) 1712 1703 0 = ([floor(2 / 1)] mod 2 + 0) 1712 1705 1 = ([floor(4 / 1)] mod 2 + 0) 1713 1706 0 = ([floor(5 / 1)] mod 2 + 0) 1713 1708 1 = ([floor(7 / 1)] mod 2 + 0) 1714 1709 0 = ([floor(8 / 1)] mod 2 + 0) 1714 1710 1 = ([floor(9 / 1)] mod 2 + 0) 1714

[0403] Although the HARQ process IDs of DL SPSs transmitted via PUCCH are all different in [Table 13], the DL SPS 1708 and DL SPS 1710 in the HARQ-ACK information transmitted via PUCCH 1714 in [Table 14] include the same HARQ process ID. According to the configuration of the HARQ-ACK codebook, the HARQ-ACK information of PUCCH 1714 includes [the HARQ-ACK of DL SPS 1708, the HARQ-ACK of DL SPS 1709, the HARQ-ACK of DL SPS 1710], but the information about the HARQ-ACK of DL SPS 1708 cannot be actually used. Since DL SPS 1708 and DL SPS 1710 have the same HARQ process ID, when receiving DL SPS 1710, the UE removes the data of the received DL SPS 1708 from the buffer. Therefore, even if the BS schedules a retransmission corresponding to the HARQ process ID, only DL SPS 1710 can be scheduled because the TB of DL SPS 1708 does not exist in the UE buffer. To solve the problem of the SPS configuration with a single index, by increasing the number of nrofHARQ-Processes, the probability that related DL SPSs in one PUCCH transmission have the same HARQ process ID can be reduced. However, the UE can receive multiple SPS configuration information within one cell / BWP and perform transmission and reception, so a bigger problem may occur in a case similar to Figure 17 that of reference label 1720. The slot structure in reference label 1720 is basically the same as that in reference label 1700, but two different SPSs are activated. The index value of SPS 1722 is 0, and the SPS period is two slots. The value of SPS 1724 is index 1, and the SPS period is one slot. According to the reference Figure 16For at least one of the described methods, the HARQ-ACK codebook transmitted in PUCCH 1747 includes [HARQ-ACK of DL SPS1732, HARQ-ACK of DL SPS1737, HARQ-ACK of 1738]. When SPS1722 has a configuration of harq-procID-offset = 0, nrofHARQ-Processes = 2, and periodicity = 2 time slots, and SPS1722 has a configuration of harq-procID-offset = 1, nrofHARQ-Processes = 3, and periodicity = 1 time slot, the HARQ process ID is determined for each DL SPS as shown in [Table 15] below.

[0404] [Table 15]

[0405] DL SPS Index DL SPS HARQ Process ID PUCCH 0 1732 0 = ([floor(1 / 2)] mod 2 + 0) 1747 0 1734 0 = ([floor(5 / 2)] mod 2 + 0) 1748 0 1735 1 = ([floor(7 / 2)] mod 2 + 0) 1749 0 1736 0 = ([floor(9 / 2)] mod 2 + 0) 1749 1 1737 2 = ([floor(1 / 1)] mod 3 + 1) 1747 1 1738 3 = ([floor(2 / 1)] mod 3 + 1) 1747 1 1740 2 = ([floor(4 / 1)] mod 3 + 1) 1748 1 1741 3 = ([floor(5 / 1)] mod 3 + 1) 1748 1 1743 2 = ([floor(7 / 1)] mod 3 + 1) 1749 1 1744 3 = ([floor(8 / 1)] mod 3 + 1) 1749 1 1745 1 = ([floor(9 / 1)] mod 3 + 1) 1749

[0406] According to [Table 15], DL SPS1743, 1744, and 1745 all have different HARQ process IDs according to SPS index 1. However, when another SPS index 2 is also considered in the HARQ-ACK codebook transmitted through PUCCH 1749, DL SPS1735 and DLSPS1745 have the same process ID. In other words, according to the method described in the reference Figure 16 the HARQ-ACK codebook transmitted through PUCCH 1749 is [HARQ-ACK of DL SPS with index 0, HARQ-ACK of DL SPS with index 1] = [HARQ-ACK of DLSPS1735, HARQ-ACK of DL SPS1736, HARQ-ACK of DL SPS1743, HARQ-ACK of DL SPS1744, HARQ-ACK of DL SPS1745]. However, since DL SPS1735 and DL SPS1745 have the same HARQ process ID, when DL SPS1745 is received, the UE removes the existing DL SPS 1735 from the buffer. Therefore, although DLSPS1735 is retransmitted, the UE cannot perform merging because there is no corresponding TB information. Figure 17Reference label 1720 shows the case where two SPSs are activated. However, as the number of activated SPSs increases and a greater number of DLSPSs within the same SPS index are mapped to the HARQ-ACK information within the same PUCCH, the probability of the HARQ process ID being repeated becomes higher. In addition, as the number of HARQ processes supported by the UE in a specific cell increases, the probability of the HARQ process ID being repeated becomes higher. To solve this problem, the BS and the UE can apply at least one of the following methods.

[0407] * Method 17-1: Increase the constraint when configuring higher signals. According to the number of DL SPSs configured for a cell / a BWP, the number of HARQ processes that can be configured for each DL SPS can be restricted. For example, when 8 SPSs are configured, the RRC standard can be restricted to a maximum of two HARQ processes per SPS. Therefore, the BS can support the number of HARQ processes that do not repeat for each SPS index through the HARQ process ID offset value. Generally, when the number of SPSs configured in a cell / a BWP is x, the number of HARQ processes corresponding to the maximum number floor(16 / x) can be applied to each SPS configuration. In the above equation, 16 can be replaced by another value and can be configured and determined by another higher signal value.

[0408] * Method 17-2: Limit the maximum number of DL SPSs that can be included in a PUCCH for each SPS. In Figure 16 For SPSs with the same index in a PUCCH, the HARQ-ACK information for two or more DL SPSs is included, and the number of HARQ-ACKs for the DL SPSs can vary according to the TDD configuration information in each PUCCH. For example, in Figure 17In reference numeral 1700, when configuring SPS with a slot period of 1, when the BS limits the number of DL SPSs that can be included in one PUCCH to 2, the DL SPS candidates that can be included in the HARQ-ACK codebook to be transmitted through PUCCH 1714 are two of the DL SPSs among DL SPS 1708, 1709, and 1710. The DL SPSs to be included in the HARQ-ACK codebook are determined in ascending or descending order according to time or HARQ process ID. In the case of ascending order in terms of time, DL SPS 1708 and 1709 are included in the HARQ-ACK codebook to be transmitted through PUCCH 1714, and the UE does not receive DL SPS 1710, and the corresponding DL SPS is not included in the HARQ-ACK codebook, even if the UE can receive the same DL SPS on the resource. [Pseudo code 17-1] Considering the same situation, it is described as follows. This is just an example, and descending order can also be fully considered.

[0409] [Pseudo code 17-1]

[0410]

[0411]

[0412] *Method 17-3: Limit the maximum number of DL SPSs that can be included in one PUCCH for all activated DL SPSs. While Method 17-2 limits the number of DL SPSs that can be included in one PUCCH for each SPS index, Method 17-3 considers all DL SPSs included in one PUCCH regardless of the SPS index, and determines that the BS and the UE only send / receive the DL SPS that is sent / received first (or last) in chronological order among the DL SPSs replicated according to the HARQ process ID, and the UE does not include the HARQ-ACK information of the DL SPS that is not sent / received in the HARQ-ACK codebook. Alternatively, considering all DL SPSs included in one PUCCH regardless of the SPS index, and determining that the BS and the UE only send / receive the DL SPS associated with the SPS having the smallest SPS index (or the largest SPS index) among the DL SPSs replicated according to the HARQ process ID, and the UE does not include the HARQ-ACK information of the DL SPS that is not sent / received in the HARQ-ACK codebook. Alternatively, the HARQ-ACK information of the un-sent / received DL SPS is included in the HARQ-ACK information, but the NACK information can be mapped.

[0413] *Method 17-4: The BS and the UE consider that all DL SPSs with the same HARQ process ID in the DLSPS associated with the HARQ-ACK codebook included in a PUCCH transmission send and receive the same TB. For example, in Figure 17 reference label 1700 of Figure 16 , when the DL SPS 1708 and the DL SPS 1710 have the same HARQ process ID in the HARQ-ACK information sent through the PUCCH 1714, the UE determines that the TBs sent and received in the DL SPS 1708 and the DL SPS 1710 are the same as each other. This can be restricted and applied to the transmission of DL SPSs sent and received within the same SPS index. Alternatively, this can be generally applied to the DL SPSs sent and received within a cell / a BWP, regardless of the SPS index. At this time, one of the methods for configuring the HARQ-ACK codebook by the UE can be executed, such as Method 17-1, 17-2, and 17-3, or the HARQ-ACK codebook configuration described in reference to

[0414] *Method 17-5: Reconfigure the HARQ process ID of the set of DL SPSs sent through a PUCCH. The above [Equation 17-1] and [Equation 17-2] determine the HARQ process ID by considering the higher configuration of nrofHARQ-Processes and periodicity configured based on the slot index used for the transmission and reception of the DL SPS without considering the PUCCH resources used for the DL SPS. [Formula 17-2] additionally considers the harq-procID-offset to determine the HARQ process ID. The HARQ process ID is a reference for a DLSPS configuration, so the HARQ process ID of another DLSPS configuration is not determined. Therefore, as Figure 17 shown, when there are multiple DL SPSs for a DLSPS configuration and the HARQ-ACK information of multiple DL SPS PDSCHs is included in a PUCCH, a new equation that considers the same as [Equation 17-1] or [Equation 17-2] needs to be considered. [Pseudo-code 17-2] provides the HARQ process ID for the DLSPS PDSCH included in the PUCCH.

[0415] [Pseudo-code 17-2]

[0416] Step 1) Determine the set of DL SPSs allocated to PUCCH i

[0417] Step 2) Allocate HARQ process IDs to each DL SPS in chronological order

[0418] [Pseudo-code 17-2] is a method for allocating HARQ process IDs to each PUCCH resource. In Figure 17 's example, the DL SPS PDSCH sets used to send HARQ-ACK information in PUCCH 1747 are 1732, 1737, and 1738. Therefore, the UE can allocate HARQ process ID 1 to 1737, HARQ process ID 2 to 1732, and HARQ process ID 3 to 1738 in chronological order. In addition, the DL SPS PDSCH sets used to send HARQ-ACK information in PUCCH 1748 are 1734, 1740, and 1741. Therefore, the UE can allocate HARQ process ID 1 to 1741, HARQ process ID 2 to 1734, and HARQ process ID 3 to 1740 in chronological order. In addition, the DL SPS PDSCH groups used to send HARQ-ACK information in PUCCH 1749 are 1735, 1736, 1743, 1744, and 1745. Therefore, the UE can allocate HARQ process ID 1 to 1743, HARQ process ID 2 to 1735, HARQ process ID 3 to 1744, HARQ process ID 4 to 1745, and HARQ process ID 5 to 1736 in chronological order. When [Pseudo-code 17-2] calculates the DL SPS set for one PUCCH resource, it can calculate the DL SPS sets for multiple PUCCH resources. [Pseudo-code 17-3] is a method for determining the HARQ process ID considering the same.

[0419] [Pseudo-code 17-3]

[0420] Step 1) Determine the DL SPS sets allocated to PUCCH i, i+1,.., i+k

[0421] Step 2) Allocate HARQ process IDs to each DL SPS in chronological order

[0422] [Pseudo-code 17-3] is a method for simultaneously determining the HARQ process IDs of DL SPSs included in multiple PUCCHs, Figure 17 described as its example. For example, in the case of k = 1, consider all DL SPS sets associated with PUCCH 1747 and 1748, and the DL SPS PDSCH sets correspond to 1732, 1734, 1737, 1738, 1740, and 1741. Therefore, the UE can allocate HARQ process ID 1 to 1737, HARQ process ID 2 to 1732, HARQ process ID 3 to 1738, HARQ process ID 4 to 1740, HARQ process ID 51 to 1741, and HARQ process ID 6 to 1734 in chronological order.

[0423] [Pseudo-code 17-2] and [Pseudo-code 17-3] are methods of assigning HARQ process IDs in chronological order considering all DL SPS configuration information as one DL SPS configuration regardless of the DL SPS index. Other available methods assign HARQ process IDs for each low or high DL SPS index. [Pseudo-code 17-4] is a method considering parts transformed from [Pseudo-code 17-2].

[0424] [Pseudo-code 17-4]

[0425] Step 1) Determine the DL SPS index assigned to PUCCHi and the DL SPS set for each DL SPS index

[0426] Step 2) Assign HARQ process IDs for each DL SPS in chronological order starting from the lowest DL SPS index

[0427] Step 3) For the next highest DL SPS index, assign and repeat HARQ process IDs for each DL SPS in chronological order

[0428] At being Figure 17In the description of [Pseudo-code 17-4] of the example, the DL SPS PDSCH sets used to send HARQ-ACK information in PUCCH 1747 are 1732, 1737, and 1738. 1732 belongs to DL SPS index 1722, and 1737 and 1738 belong to DL SPS index 1724. When DL SPS index 1722 is less than DL SPS index 1724, the UE can consider the DL SPS index and the time order to allocate HARQ process ID 1 to 1732, HARQ process ID 2 to 1737, and HARQ process ID 3 to 1738. In addition, the DL SPS PDSCH sets used to send HARQ-ACK information in PUCCH 1748 are 1734, 1740, and 1741. 1734 belongs to DL SPS index 1722, and 1740 and 1741 belong to DL SPS index 1724. Therefore, the UE can consider the DL SPS index and the time order, and allocate HARQ process ID 1 to 1734, HARQ process ID 2 to 1740, and HARQ process ID 3 to 1741 in time order. The DL SPS PDSCH groups used to send HARQ-ACK information in PUCCH 1749 are 1735, 1736, 1743, 1744, and 1745. 1735 and 1736 belong to DL SPS index 1722, and 1743, 1744, and 1745 belong to DL SPS index 1724. Therefore, the UE can consider the DL SPS index and the time order to allocate HARQ process ID 1 to 1735, HARQ process ID 2 to 1736, HARQ process ID 3 to 1743, HARQ process ID 4 to 1744, and HARQ process ID 5 to 1745.

[0429] [Pseudo-code 17-5] is a combination of [Pseudo-code 17-4] and [Pseudo-code 17-3]. That is, it is a scheme for allocating HARQ process IDs for each DL SPS index in time order for multiple PUCCHs.

[0430] [Pseudo-code 17-5]

[0431] Step 1) Determine the DL SPS indices assigned to PUCCHi, PUCCHi+1, …, PUCCHi+k and the DL SPS sets for each DL SPS index

[0432] Step 2) Allocate HARQ process IDs for each DL SPS in time order starting from the lowest DL SPS index

[0433] Step 3) For the next highest DL SPS index, allocate and repeat HARQ process IDs for each DL SPS in time order

[0434] The description in [Pseudo-code 17-5] is Figure 17 an example. For example, in the case of k = 1, consider all DL SPS sets associated with PUCCH 1747 and 1748, and the DL SPS PDSCH sets correspond to 1732, 1734, 1737, 1738, 1740, and 1741. The DL SPS index 1722 corresponds to 1732 and 1734, and the DL SPS index 1724 corresponds to 1737, 1738, 1740, and 1741. Therefore, the UE can consider the DL SPS index and the time order to assign HARQ process ID 1 to 1732, HARQ process ID 2 to 1734, HARQ process ID 3 to 1737, HARQ process ID 4 to 1738, HARQ process ID 5 to 1740, and HARQ process ID 6 to 1741.

[0435] In [Pseudo-code 17-4] and [Pseudo-code 17-5], the HARQ process ID is determined in sequence from the lowest DL SPS index to the highest DL SPS index, but the HARQ process ID can be determined in reverse sequence from the highest DL SPS index to the lowest DL SPS index. In [Pseudo-code 17-2], [Pseudo-code 17-3], [Pseudo-code 17-4], and [Pseudo-code 17-5], when determining the HARQ process ID, the HARQ process ID is determined in chronological order according to the order of the DL SPS from the first transmitted / received DL SPS to the last transmitted / received DL SPS, but the HARQ process ID can be determined sufficiently in reverse order from the last transmitted / received DL SPS to the immediately previous transmitted / received DL SPS.

[0436] *Method 17-6: Transformation corresponding to Method 17-4. Although in Method 17-4, the BS and the UE consider that all DL SPSs with the same HARQ process ID in the DL SPSs associated with the HARQ-ACK codebook included in one UPCH transmission transmit and receive the same TB, in Method 17-6, the UE can receive only the first existing DL SPS in chronological order or the DL SPS with the lowest index value among the DL SPSs with the same HARQ process. In Figure 17In the description of the example, when the HARQ process IDs of 1732 and 1738 in DL SPS 1732, 1737, and 1738 included in PUCCH 1747 are the same, the UE only receives one SPS PDSCH among 1732 and 1737. Specifically, the UE can only receive DL SPS 1732 with a lower DL SPS index, or receive the DL SPS 1737 that exists first in chronological order. For the SPS PDSCH that has not been received, the BS may not actually send the corresponding resources. Therefore, the UE does not send HARQ-ACK information for the SPS PDSCH that has not been received.

[0437] Figure 18 is a block diagram showing the HARQ-ACK information reported by the UE according to DL SPS transmission / reception.

[0438] In operation 1800, the UE can first receive one or more DL SPS configuration information of a cell / a BWP and separately receive the DCI for activating the DL SPS. Thereafter, in operation 1802, the UE transmits and receives data through the single or multiple activated DL SPSs. In operation 1804, the UE reports the HARQ-ACK information for DL SPS reception according to Figures 16 to 18 the method described.

[0439] Figure 19 is a block diagram showing the structure of a UE capable of implementing an embodiment of the present disclosure.

[0440] Referring to Figure 19 , the UE according to the present disclosure may include a UE receiver 1900, a UE transmitter 1904, and a UE processor 1902. In an embodiment, the UE receiver 1900 and the UE transmitter 1904 are generally referred to as a transceiver. The transceiver can send signals to and receive signals from the BS. The signal may include control information and data. To this end, the transceiver may include an RF transmitter that up-converts and amplifies the frequency of the transmitted signal, an RF receiver that low-noise amplifies the received signal and down-converts the frequency, etc. The transceiver can receive signals through a radio channel and output the signals to the UE processor 1902, and send the signals output from the UE processor 1902 through the radio channel. The UE processor 1902 can control a series of processes so that the UE can operate according to the embodiment.

[0441] Figure 20 is a block diagram showing the structure of a BS capable of implementing an embodiment of the present disclosure.

[0442] Referring to Figure 20, in an embodiment, the BS may include at least one of a BS receiver 2001, a BS transmitter 2005, and a BS processor 2003. In an embodiment of the present disclosure, the BS receiver 2001 and the BS transmitter 2005 are generally referred to as a transceiver. The transceiver may send signals to and receive signals from the UE. The signal may include control information and data. To this end, the transceiver includes an RF transmitter that up-converts and amplifies the frequency of the transmitted signal, an RF receiver that performs low-noise amplification on the received signal and down-converts the frequency, etc. The transceiver may receive a signal through a radio channel and output the signal to the UE processor 2003, and transmit the signal output from the UE processor 2003 through the radio channel. The BS processor 2003 may control a series of processes such that the BS can operate according to the embodiments described above in the present disclosure.

[0443] Figure 21 Illustrates HARQ-ACK transmission / reception for DL SPS reception according to an embodiment.

[0444] As described above, DL SPS means repeating the transmission / reception of the same time and frequency resources according to a specific period. The time and frequency resources may be indicated by a time resource allocation field and a frequency resource allocation field in a DCI format for activating DL SPS. The period information may be configured by a higher signal. Figure 21 Illustrates a case where DL SPS is configured as a slot period. For ease of description, reference numeral 2112 is SPS PDSCH 1, reference numeral 2113 is SPS PDSCH 2, reference numeral 2114 is SPS PDSCH 3, reference numeral 2115 is SPS PDSCH 4, reference numeral 2116 is SPS PDSCH 5, reference numeral 2117 is SPS PDSCH 6, reference numeral 2118 is SPS PDSCH 7, reference numeral 2119 is SPS PDSCH8, reference numeral 2120 is SPS PDSCH 9, and reference numeral 2121 is SPS PDSCH 10.

[0445] A slot in which a PUCCH including HARQ information (ACK or NACK) for each of SPS PDSCH 1 to 10 is indicated by "PDSCH-to-HARQ-ACK feedback timing (k1)" information in a DCI format for activating DL SPS. The unit of k1 may be a sub-slot configured in a unit smaller than a slot or 14 symbols. Figure 21Shows a case where k1 is indicated as one time slot. The HARQ-ACK information for SPS PDSCH 1 2112 transmitted / received in time slot #1 2100 is transmitted / received in PUCCH 2123 of time slot #2, the HARQ-ACK information for SPS PDSCH 2 2113 transmitted / received in time slot #2 is transmitted / received in PUCCH 2124 of time slot #3, the HARQ-ACK information for SPS PDSCH 3 2114 transmitted / received in time slot #3 is transmitted / received in PUCCH 2125 of time slot #4, and in this way, the HARQ-ACK information for SPS PDSCH X transmitted / received in PUCCH 2125 of time slot #X is transmitted / received in the PUCCH of time slot #(X + 1). X + 1 is an example in the case where K1 is indicated as 1, and if K1 is N, X + 1 can be X + N.

[0446] The PUCCH including the HARQ-ACK information included in the time slot indicated for transmitting the HARQ-ACK information can be preconfigured by a higher signal, and this signal can include the time and frequency resources of the PUCCH and the PUCCH format information. When the PUCCH overlaps with another PUSCH, the HARQ-ACK information included in the PUCCH can be included in the PUSCH and transmitted from the UE to the BS.

[0447] Figure 21 The above description can be applied to the case where the frequency band in which the SPS PDSCH is transmitted / received is different from the frequency band in which the PUCCH includes the HARQ-ACK information. This is called a frequency division duplex (FDD) system. Therefore, the chance that the SPS PDSCH or PUCCH including the HARQ-ACK information is discarded (or cancelled) by another specific signal is small. Discarding (or cancelling) means that the UE does not transmit or receive data. Discarding (or cancelling) can be indicated by a higher signal or an L1 signal. For example, when the L1 signal (e.g., time slot format indicator) information indicates symbols that are not downlink symbols (uplink symbols or flexible symbols) in some symbols of the corresponding resources in the resource region for receiving the SPS PDSCH, the UE does not receive the corresponding SPS PDSCH. Similarly, when the L1 signal information in the resource region for the PUCCH (or the PUCCH configured by a higher signal) for transmitting the HARQ-ACK information for the SPS PDSCH indicates symbols that are not uplink symbols (downlink symbols or flexible symbols) in some symbols of the corresponding resources, the UE does not transmit the corresponding PUCCH. Specifically, the UE can transmit or may not transmit the PUCCH included in a predetermined interval immediately after the time point of receiving the L1 signal, and does not transmit the PUCCH after the predetermined interval immediately after the time point of receiving the L1 signal.

[0448] In a time-division duplex (TDD) system, when the SPS PDSCH is configured periodically but there is a possibility that the SPS PDSCH is discarded by another higher signal or L1 signal, there is also a possibility that the PUCCH including HARQ-ACK information is discarded by another higher signal or L1 signal. Therefore, when both the SPS PDSCH and the PUCCH including the corresponding HARQ-ACK information are discarded, there is no major problem for the BS and the UE. This is because there is no data transmitted and received between them.

[0449] At the same time, when the SPS PDSCH is discarded but the PUCCH including HARQ-ACK information is not discarded, it may be wise not to transmit the corresponding PUCCH. This is because the UE does not receive the data and thus will transmit a NACK, and even if the PUCCH is not transmitted, the BS knows the UE's data reception status. Therefore, the UE can obtain a power consumption gain by not transmitting the PUCCH.

[0450] In addition, when the SPS PDSCH is not discarded but the PUCCH including HARQ-ACK information is discarded, the UE receives the data included in the SPS PDSCH but has no opportunity to transmit HARQ-ACK information for this. Therefore, the UE may not receive the SPS PDSCH, and the BS cannot receive the HARQ-ACK and thus may not transmit the SPS PDSCH to the UE. Alternatively, the SPS PDSCH is transmitted, but the PUCCH including HARQ-ACK information can be received in resources other than the regularly discarded resources.

[0451] In Figure 21In the example, when the PUCCH 2123 including the HARQ-ACK information for the SPS PDSCH 1 211 2 is discarded, the UE may insert the HARQ-ACK information for the SPS PDSCH 1 2112 into the PUCCH 2124, which is an undiscarded PUCCH resource, after it to send the information. At this time, the PUCCH 2124 may include the HARQ-ACK information for both the SPS PDSCH 1 2112 and the SPS PDSCH 2 2113. Such a scheme may be referred to as a HARQ-ACK shifting method, a group SPS PDSCH HARQ-ACK reporting method, etc. In the present disclosure, for the sake of convenience of description, it is referred to as a shifting method. The shifting method may be configured by a higher layer signal or an L1 signal, and the information indicating whether the corresponding SPS supports the shifting method may be included in the SPS configuration. When the shifting method is supported, the UE determines which PUCCHs are discarded and not discarded based on at least one of the following information, and determines which HARQ-ACK information will be included in the SPS PDSCH of the undiscarded PUCCH.

[0452] - TDD configuration information indicated by a higher layer signal (tdd-UL-DL-ConfigurationCommon or TDD-UL-DL-ConfigurationDedicated)

[0453] - TDD configuration information indicated by an L1 signal (DCI format 2_0, time slot format indicator)

[0454] - K1 information (PDSCH-to-HARQ-ACK feedback timing)

[0455] - SPS period information

[0456] - Time-frequency resource information

[0457] The UE may determine not to discard the PUCCH resources for the SPS PDSCH that only includes uplink symbols indicated by the TDD configuration information indicated by a higher signal. The reason is that the uplink symbols cannot be changed to flexible symbols or downlink symbols, so the PUCCH can always be transmitted. Alternatively, the UE may determine not to discard the PUCCH resources for the SPS PDSCH that includes uplink symbols or flexible symbols indicated by the TDD configuration information indicated by a higher signal, because the uplink symbols and flexible symbols can be applied to PUCCH transmission. Alternatively, when at least one symbol of the PUCCH resources for the SPS PDSCH is indicated as a downlink symbol according to the TDD configuration information indicated by a higher signal, the UE may determine that the PUCCH for the corresponding SPS PDSCH is discarded, because the UE cannot transmit uplink information in the resource area indicated by the downlink symbol. Alternatively, when at least one symbol of the PUCCH resources for the SPS PDSCH is indicated as a downlink symbol according to the TDD configuration information indicated by a higher signal, the UE may determine that the PUCCH for the corresponding SPS PDSCH is discarded, because the UE cannot transmit uplink information in the resource area indicated by the downlink symbol. Alternatively, when at least one symbol of the PUCCH resources for the SPS PDSCH is indicated as a downlink symbol or a flexible symbol according to the TDD configuration information indicated by a higher signal, the UE may determine that the PUCCH for the corresponding SPS PDSCH is discarded, because the flexible symbol can be indicated as a downlink symbol by another L1 signal, and at this time the UE cannot transmit the PUCCH. Another reason is that when the UE monitors DCI format 2_0, when the resource area to which the PUCCH of the SPS PDSCH belongs is pre-indicated as a flexible symbol by a higher signal, even if the UE does not monitor DCI format 2_0, the UE cannot perform the corresponding PUCCH transmission. When the shifting method is applied thereto, the effective PUCCH resource configurations of the SPS PDSCH understood by the UE and the BS may be different, which results in different determinations of the SPS PDSCH sets included in each PUCCH.

[0458] For example, in Figure 21In the case where PUCCH 2123, PUCCH 2127, and PUCCH 2131 are all resources indicated by uplink symbols according to the TDD configuration information indicated by a higher signal, and other PUCCHs are resources in which at least one symbol is indicated as a downlink symbol or a flexible symbol according to the TDD configuration information indicated by a higher signal, when a shifting method for PUCCH 2123, PUCCH 2127, and PUCCH 2131 is configured, the UE can determine that PUCCH 2123, PUCCH 2127, and PUCCH 2131 are discarded while other PUCCHs are not discarded. When the shifting method is configured, the UE can map and transmit HARQ-ACK feedback for the SPS PDSCH only among PUCCH 2123, PUCCH 2127, and PUCCH 2131, and the HARQ-ACK feedback information of the SPS PDSCH included in the PUCCH can be determined by at least one of the SPS transmission period K1 and the TDD configuration information indicated by a higher signal.

[0459] In Figure 21 In the case where the value of K1 is one time slot, and the SPS transmission period is one time slot, and all resources of the SPS PDSCH are configured as downlink symbols or flexible symbols according to the TDD configuration information indicated by a higher signal, PUCCH2123 can include HARQ-ACK feedback information for SPS PDSCH 1, PUCCH 2127 can include HARQ-ACK feedback information for SPS PDSCH2, SPS PDSCH 3, SPS PDSCH4, and SPS PDSCH 5, and PUCCH 2131 can include HARQ-ACK feedback information for SPS PDSCH 6, SPS PDSCH 7, SPS PDSCH 8, and SPS PDSCH 9. Generally, the HARQ-ACK feedback resources included in a specific PUCCH i can be used for the SPS PDSCH received in the time slots from {(Nd - Nd_offset - k1 + 1) to (Nd - k1)}. At this time, the following parameters are described, and PUCCHi-1 represents the PUCCH resource that has not been discarded before PUCCHI.

[0460] -Nd + PUCCH i time slot

[0461] -Nd_offset = the difference between the PUCCH i time slot and the PUCCH i-1 time slot

[0462] -K1 = PDSCH to HARQ-ACK feedback timing

[0463] In Figure 21In the example, when the time slot of PUCCH 2127 is #6 and the time slot of the PUCCH that has not been discarded immediately before #6 is #2, Nd_offset is 4 and K1 is one time slot. Therefore, the UE may include HARQ-ACK feedback information received in time slots #(2 = 6 - 4 - 1 + 1) to #(5 = 6 - 1) for the SPS PDSCH. When SPS PDSCH2 has at least one symbol that is an uplink symbol according to the TDD configuration information indicated by a higher signal, the UE may not include HARQ-ACK feedback for SPS PDSCH3 in PUCCH2127. Regardless of whether shift information is configured, this feedback may be applied jointly.

[0464] When no shift method is configured and according to the TDD configuration information indicated by a higher signal, all symbols in all SPS PDSCHs are downlink or flexible symbols, the UE may include HARQ-ACK feedback information for SPS PDSCH 1 in PUCCH 2123, HARQ-ACK feedback information for SPS PDSCH 2 in PUCCH 2124, HARQ-ACK feedback information for SPS PDSCH 3 in PUCCH2125, HARQ-ACK feedback information for SPS PDSCH 4 in PUCCH 2126, HARQ-ACK feedback information for SPS PDSCH 5 in PUCCH 2127, HARQ-ACK feedback information for SPS PDSCH 6 in PUCCH 2128, HARQ-ACK feedback information for SPSPDSCH 7 in PUCCH 2129, HARQ-ACK feedback information for SPS PDSCH 8 in PUCCH 2130, and HARQ-ACK feedback information for SPS PDSCH 9 in PUCCH 2131, regardless of PUCCH discard.

[0465] When at least one symbol of a specific SPS PDSCH resource in the periodically transmitted and received SPS PDSCH is indicated as an uplink symbol according to the TDD configuration information indicated by a higher signal, the UE does not receive the corresponding SPS PDSCH and does not generate the corresponding HARQ-ACK feedback information.

[0466] In another example, when SPS PDSCH operates, the UE can receive indications of multiple K1 values. For multiple K1 values, the set of multiple K1 values can be indicated by an L1 signal, or one K1 value indicated by an L1 signal and a K1 offset value pre-indicated by a higher signal can be configured as the set of multiple K1 values. In the former case, the K1 field included in the DCI field indicating SPS PDSCH activation can indicate information such as {k1, k2, k3}, and in the case of DCI for dynamic scheduling (or DCI scrambled by C-RNTI), the first K1 value (k1) can be used as the value of the K1 field, and it can be considered that in the case of DCI indicating SPS PDSCH activation (or DCI scrambled by CS-RNTI as described above and DCI with a specific NDI, RV, or HARQ process number), the values of {k1, k2, k3} are applied to SPS PDSCH. In the latter case, when only one value of k1 is received for the DCI, but the information of {k1', k2', k3'} is configured by a higher signal, the UE can apply both k1 and {k1', K2', K3'} indicated by the higher signal simultaneously, and it is considered that {k1 + k1', k1 + k2', k1 + k3'} is applied. In both the former and the latter cases, the HARQ-ACK feedback of one SPS PDSCH can be sent by multiple PUCCHs, and the PUCCH including the HARQ-ACK feedback of the actual SPS PDSCH is the PUCCH that first exists among the PUCCHs (which are PUCCHs indicated by multiple k1 values and have at least one symbol that is not indicated as a downlink symbol or a flexible symbol according to the TDD configuration information indicated by the higher signal).

[0467] In Figure 21 the example of, when the k1 value is configured as {1, 2, 3}, the HARQ-ACK information for SPS PDSCH 1 can be included in PUCCH 2123, PUCCH 2124, and PUCCH 2125. When at least one symbol is indicated as a downlink symbol or a flexible symbol in PUCCH 2123 according to the higher signal TDD configuration information, and all symbols are indicated as uplink symbols in PUCCH 2124 and PUCCH 2125, the UE can include the corresponding information in PUCCH 2124. Such a method is called the second shifting method. One of the shifting method and the second shifting method can be pre-configured by a higher signal. Alternatively, in the second shifting method, a specific k1 value can imply the shifting method. For example, indicating {2, -1}, the UE can consider -1 to represent the shifting method and determine that the value of {2} is the k1 value. When configuring a k1 set without -1, the UE can determine to apply the second shifting method. -1 is just an example, and other values can also be used.

[0468] The shifting method can be described in [Pseudo-code 20-1] of [Table 16] below.

[0469] [Table 16]

[0470]

[0471]

[0472] Figure 22 is a flowchart showing the operations of a UE according to an embodiment.

[0473] In operation 2200, as described above, the UE receives higher configuration information for DL SPS from the BS. The higher configuration information may be a DL SPS transmission period, a PUCCH resource including HARQ-ACK information, and MCS table information. In operation 2202, the UE receives method information for determining the HARQ process ID of the SPS PDSCH. The corresponding information may be, for example, higher signal information such as DL SPS, higher signal information separate therefrom, or information included in the DCI for activating DL SPS. Specifically, when the corresponding information is associated with the BWP configuration, the corresponding information may be information that can correspond to all common DL SPSs within the BWP, and when the corresponding information is associated with the DL SPS configuration, the corresponding information may be information that can be applied to each DL SPS within the BWP. In addition, the corresponding information may be information notifying a specific one of the above [Equations 17-1] to [Equations 17-6] to determine Figure 17 the HARQ process ID in. The corresponding information may also include information notifying the application of Figure 17 one of Methods 17-1 to 17-6 in. The corresponding information is not limited to Figure 17 , and may notify information on the method for determining the HARQ process ID in the present disclosure. In operation 2204, the UE determines the HARQ process ID of the SPS PDSCH based on the method information for determining the HARQ process ID, and after activating the DL SPS, in operation 2206, receives the DL SPS and reports HARQ-ACK feedback therefor.

[0474] For example, when the UE receives the configuration of multiple DL SPSs and subsequently receives information indicating that the HARQ process ID of the configured DL SPSs is determined according to [Equation 17-3], the UE determines the HARQ process IDs of the multiple DL SPSs according to [Equation 17-3], receives the DL SPSs, and reports HARQ-ACK feedback to the BS after activating the DL SPS.

[0475] In another example, when the UE receives the configurations of multiple DL SPSs and subsequently receives the information indicating to determine the HARQ process ID of the configured DL SPS according to [Equation 17-1], the UE determines the HARQ process IDs of the multiple DL SPSs according to [Equation 17-1], receives the DL SPSs, and reports HARQ-ACK feedback to the BS after activating the DL SPSs.

[0476] In another example, when multiple DL SPSs are configured, the UE may receive the information on the method to determine the HARQ process ID of the DL SPS. In the case where three DL SPSs are configured, when DL SPS index 1 is configured as [Equation 17-1], DL SPS index 2 is configured as [Equation 17-2], and DL SPS index 3 is configured as [Equation 17-3], the UE determines the HARQ process ID of DL SPS index 1 according to [Equation 17-1], and determines the HARQ process IDs of DL SPS indexes 2 and 3 according to [Equation 17-3]. After activating the DL SPSs, the UE receives the DL SPSs and reports HARQ-ACK feedback to the BS.

[0477] In another example, the UE may use different methods to determine the HARQ process ID according to the HARQ-ACK information transmission scheme for the DL SPS. For one DL SPS index, when there is a single resource for transmitting the HARQ-ACK information of a single DL SPS, the UE determines the HARQ process ID by applying one of [Equation 17-1] or [Equation 17-2]. For one DL SPS index, when there is a common resource for transmitting the HARQ-ACK information of multiple DL SPSs, the UE determines the HARQ process ID by applying one of [Equation 17-3] and [Equation 17-6]. After activating the DL SPS, the UE receives the DL SPS and reports HARQ-ACK feedback to the BS. This scheme can be applied to a single DL SPS or two or more DL SPSs.

[0478] In another example, as the DCI information activated for the configured DL SPS, the UE may receive the information indicating at least one of [Equation 17-1] or [17-6], and determine the HARQ process ID of the DL SPS based on this information. As the information, the HARQ process ID, NDI, or other DI format fields may be used, or the RNTI information may be used.

[0479] In another example, for DL SPS indicated by at least one of [Equation 17-3] to [Equation 17-6], the UE may apply a common HARQ process ID to the DL SPS indicated by the same equation information. Alternatively, when at least one of the configured DL SPS determines the HARQ process ID based on at least one of [Equation 17-3] to [Equation 17-6], this equation may be commonly applied to all other DL SPS. All other DL SPS may refer to the DL SPS included in one BWP or the DL SPS included in one cell or carrier.

[0480] In another example, for DL SPS indicated by at least one of [Equation 17-1] to [Equation 17-2], the UE may apply a common HARQ process ID to the DL SPS indicated by the same equation information. Alternatively, when at least one of the configured DL SPS determines the HARQ process ID based on at least one of [Equation 17-1] to [Equation 17-2], this equation may be commonly applied to all other DL SPS. All other DL SPS may refer to the DL SPS included in one BWP or the DL SPS included in one cell or carrier.

[0481] Figure 22 The method mainly describes selecting an equation for determining the HARQ process ID, but is not limited thereto, and can be commonly applied to Figure 17 Method 17-1 to Method 17-6 described therein or all other methods described in the present disclosure.

[0482] Figure 23 is a flowchart showing the BS operation according to an embodiment.

[0483] In operation 2300, the BS transmits one of multiple DL SPS configuration information. In operation 2302, the BS transmits information for determining the HARQ process ID. This information may be the information included in the DCI format for activating a higher signal or DL SPS. The corresponding information for determining the HARQ process ID may be Figure 17 at least one of [Equation 17-1] to [Equation 17-6] described therein. In operation 2304, when multiple DL SPS configurations are indicated, the BS may determine the HARQ process ID based on different equations for each DL SPS, or determine the HARQ process ID based on a common equation for some or all of the configured DL SPS. In operation 2306, the BS transmits DL SPS information based on the determined HARQ process ID determined according to the indicated equation information and receives HARQ feedback information for this.

[0484] Figure 23A method for selecting an equation for determining a HARQ process ID is mainly described, but is not limited thereto, and can be commonly applied to Figure 17 Method 17-1 to Method 17-6 described in Figure 17 or all other methods described in the present disclosure.

[0485] In addition, in various embodiments of the present disclosure, "data" may include a transport block (TB) transmitted through a shared channel such as PDSCH, PUSCH, or PSSCH.

[0486] In the present disclosure, examples of a higher signal (or a higher-level signal or a high-level signal) may be a UE common signal such as MIB or SIB, or a UE-specific higher signal such as RRC or MAC CE.

[0487] In the present disclosure, examples of an L1 signal may be a specific field in DCI, DCI format information, RNTI information scrambled with the CRC of DCI, or control region resource information for transmitting and receiving DCI.

[0488] In the drawings describing the methods of the present disclosure, the described order does not always correspond to the order of steps for performing each method, and the order relationship between steps may be changed, or the steps may be executed in parallel. Alternatively, in the drawings describing the methods of the present disclosure, some elements may be omitted and only some elements may be included without departing from the basic spirit and scope of the present disclosure.

[0489] The present invention mainly describes UE operations for SPS PDSCH, but the present invention can be equally and fully applied to grant-free PUSCH (or configured grant types 1 and 2).

[0490] In addition, in the methods of the present disclosure, part or all of the content of each embodiment can be implemented in combination without departing from the basic spirit and scope of the present disclosure.

[0491] The embodiments of the present disclosure described and illustrated in the specification and drawings are merely specific examples presented to easily explain the technical content of the present disclosure and help understand the present disclosure, rather than to limit the scope of the present disclosure. That is, it is obvious to those skilled in the art that other variations based on the technical idea of the present disclosure can be implemented. In addition, the above-described various embodiments can be used in combination as needed. For example, multiple embodiments of the present disclosure can be partially combined with each other to operate a base station and a terminal. In addition, although the above embodiments have been described based on the NR system, other variations based on the technical idea of the embodiments can also be implemented in other systems such as FDD or TDD LTE systems.

[0492] In addition, although the exemplary embodiments of the present disclosure are described and illustrated by using specific terms in the specification and the drawings, these exemplary embodiments are used in a general sense only for easily explaining the technical content of the present disclosure and helping to understand the present disclosure, rather than for limiting the scope of the present disclosure. It will be obvious to those skilled in the art that other variations based on the technical idea of the present disclosure can be implemented in addition to the embodiments disclosed herein.

Claims

1. A method performed by a terminal in a wireless communication system, the method comprising: Receiving a radio resource control (RRC) message including time division duplex (TDD) configuration information from a base station; Receiving a first semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) from the base station; Identifying a first time slot of a first physical uplink control channel (PUCCH) having first hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits associated with the first SPS PDSCH; Identifying an earliest second time slot of a second PUCCH when a symbol associated with the first PUCCH in the first time slot is indicated as a downlink based on the TDD configuration message; And Transmitting the second PUCCH having second HARQ-ACK information bits to the base station in the earliest second time slot, Wherein, when the first SPS PDSCH and a second SPS PDSCH having the same HARQ process ID are received before transmitting the second PUCCH, the HARQ-ACK information bits of the first SPS PDSCH are not included in the second HARQ-ACK information bits.

2. The method according to claim 1, Among them, The first SPS PDSCH is received earlier than the second SPS PDSCH.

3. The method according to claim 1, wherein The second PUCCH resource does not have a symbol indicated as the downlink.

4. A method performed by a base station in a wireless communication system, the method comprising: Sending a radio resource control (RRC) message including time division duplex (TDD) configuration information to a terminal; Sending a first semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) to the terminal; Identifying a first time slot of a first physical uplink control channel (PUCCH) having first hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits associated with the first SPS PDSCH; Identifying an earliest second time slot of a second PUCCH when a symbol associated with the first PUCCH in the first time slot is indicated as a downlink based on the TDD configuration message; And Receiving the second PUCCH having second HARQ-ACK information bits from the terminal in the earliest second time slot, Wherein, when the first SPS PDSCH and a second SPS PDSCH having the same HARQ process ID are sent before receiving the second PUCCH, the HARQ-ACK information bits of the first SPS PDSCH are not included in the second HARQ-ACK information bits.

5. The method according to claim 4, Among them, The first SPS PDSCH is sent earlier than the second SPS PDSCH.

6. The method according to claim 4, Among them, The second PUCCH resource does not have a symbol indicated as the downlink.

7. A terminal in a wireless communication system, the terminal comprising: A transceiver configured to transmit and receive signals; And A processor operably coupled to the transceiver, wherein the processor is configured to: Receive a Radio Resource Control (RRC) message including Time Division Duplex (TDD) configuration information from a base station; Receive a first Semi-Persistent Scheduling (SPS) Physical Downlink Shared Channel (PDSCH) from the base station; Identify a first time slot of a first Physical Uplink Control Channel (PUCCH) having first Hybrid Automatic Repeat reQuest acknowledgement (HARQ-ACK) information bits associated with the first SPS PDSCH; Identify an earliest second time slot of a second PUCCH if a symbol associated with the first PUCCH in the first time slot is indicated as a downlink based on the TDD configuration message; and Transmit the second PUCCH having second HARQ-ACK information bits to the base station in the earliest second time slot, wherein, when the first SPS PDSCH and a second SPS PDSCH having the same HARQ process ID are received before transmitting the second PUCCH, the HARQ-ACK information bits of the first SPS PDSCH are not included in the second HARQ-ACK information bits.

8. The terminal according to claim 7, Among them, wherein the first SPS PDSCH is received earlier than the second SPS PDSCH.

9. The terminal according to claim 7, Among them, wherein the second PUCCH resource does not have a symbol indicated as the downlink.

10. A base station in a wireless communication system, the base station comprising: A transceiver configured to transmit and receive signals; and and A processor operably coupled to the transceiver, wherein the processor is configured to: Transmit a Radio Resource Control (RRC) message including Time Division Duplex (TDD) configuration information to a terminal; Transmit a first Semi-Persistent Scheduling (SPS) Physical Downlink Shared Channel (PDSCH) to the terminal; Identify a first time slot of a first Physical Uplink Control Channel (PUCCH) having first Hybrid Automatic Repeat reQuest acknowledgement (HARQ-ACK) information bits associated with the first SPS PDSCH; Identify an earliest second time slot of a second PUCCH if a symbol associated with the first PUCCH in the first time slot is indicated as a downlink based on the TDD configuration message; and Receive the second PUCCH having second HARQ-ACK information bits from the terminal in the earliest second time slot, wherein, when the first SPS PDSCH and a second SPS PDSCH having the same HARQ process ID are transmitted before receiving the second PUCCH, the HARQ-ACK information bits of the first SPS PDSCH are not included in the second HARQ-ACK information bits.

11. The base station according to claim 10, Among them, wherein the first SPS PDSCH is transmitted earlier than the second SPS PDSCH.

12. The base station according to claim 10, Among them, The second PUCCH resource does not have a symbol indicated as the downlink.

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