Method and apparatus for grant-free based data transmission in a wireless communication system

Abstract

A communication method and system for aggregating a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with technologies for Internet of Things (IoT) are provided. The communication method includes intelligent services based on 5G communication technologies and IoT-related technologies, such as smart homes, smart buildings, smart cities, smart cars, connected cars, health, digital education, smart retail, security, and security services. The present disclosure provides a grant-free based data transmission method and apparatus.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for grant-free data transmission in a wireless communication system. Background Art

[0002] To meet the increasing demand for wireless data services since the deployment of the 4th generation (4G) communication system, efforts have been made to develop improved 5th generation (5G) or pre-5G communication systems. Therefore, 5G or pre-5G communication systems are also referred to as "beyond 4G networks" or "post-Long Term Evolution (LTE) systems." Furthermore, 5G communication systems are also referred to as "new radio access technology (NR) systems."

[0003] 5G communication systems are expected to be implemented in higher frequency (millimeter wave, mmWave) bands, such as the 60 GHz band, to achieve higher data rates. To reduce radio wave propagation losses and increase transmission distances, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technologies are being discussed in 5G communication systems and incorporated into NR systems.

[0004] In addition, in 5G communication systems, system network improvements are being developed based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communications, wireless backhaul, mobile networks, cooperative communications, coordinated multipoint (CoMP), and receiver-side interference cancellation. In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) have been developed as advanced coding modulation (ACM), as well as filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as advanced access technologies.

[0005] The Internet, a human-centric connected network where humans generate and consume information, has now evolved into the Internet of Things (IoT), in which distributed entities such as objects exchange and process data without human intervention. The Internet of Everything (IoE), a combination of IoT technology and big data processing technology connected to cloud servers, has emerged. Since IoT implementation requires technical elements such as sensing technology, wired / wireless communication and network infrastructure, service interface technology, and security technology, sensor networks, machine-to-machine (M2M) communication, and machine-type communication (MTC) have recently been researched. This IoT environment can provide intelligent Internet technology services that create new value for human life by collecting and analyzing data generated by connected objects. The IoT can be applied to a variety of fields, including smart homes, smart buildings, smart cities, smart cars or connected vehicles, smart grids, healthcare, smart appliances, and advanced medical services, by integrating and combining existing information technology (IT) and various industrial applications.

[0006] In line with this, 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 networks (RAN), which are the aforementioned big data processing technologies, can also be considered an example of the convergence between 5G and IoT technologies.

[0007] 5G communication systems have been developed to provide a variety of services, and as a result of the provision of a variety of services, methods for efficiently providing these services are required. Therefore, research on unlicensed communication has been actively conducted.

[0008] The above information is presented as background information only to assist in understanding the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with respect to the present disclosure. Summary of the Invention

[0009] Technical issues

[0010] Recently, there is a need to enhance unlicensed data transmission and reception in 5G wireless communication systems.

[0011] Solution

[0012] Aspects of the present disclosure address at least the aforementioned problems and / or disadvantages and provide at least the advantages described below. Therefore, one aspect of the present disclosure is to provide embodiments for efficiently utilizing radio resources, and to describe methods for performing grant-free data transmission and reception. In particular, methods for downlink grant-free data transmission and reception and uplink grant-free data transmission and reception are described.

[0013] Additional aspects will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the presented embodiments.

[0014] According to one aspect of the present disclosure, a method performed by a terminal is provided. The method includes: receiving downlink control information (DCI) indicating the release of multiple semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs) from a base station, obtaining a hybrid automatic repeat request acknowledgment (HARQ-ACK) codebook including HARQ-ACK information bits corresponding to the DCI, and sending the HARQ-ACK codebook to the base station, wherein the position of the HARQ-ACK information bit corresponding to the DCI in the HARQ-ACK codebook is the same as that for the corresponding SPS PDSCH reception with the lowest SPS index among the multiple SPS PDSCH releases.

[0015] According to another aspect of the present disclosure, a method performed by a base station is provided. The method includes: sending downlink control information (DCI) indicating the release of multiple semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs) to a terminal, and receiving a hybrid automatic repeat request acknowledgment (HARQ-ACK) codebook including HARQ-ACK information bits corresponding to the DCI from the terminal, wherein the position of the HARQ-ACK information bit corresponding to the DCI in the HARQ-ACK codebook is the same as that received for the corresponding SPS PDSCH with the lowest SPS index among the multiple SPS PDSCH releases.

[0016] According to another aspect of the present disclosure, a terminal is provided. The terminal includes: a transceiver configured to receive and transmit signals; and a controller configured to: receive downlink control information (DCI) indicating the release of multiple semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs) from a base station, obtain a hybrid automatic repeat request acknowledgment (HARQ-ACK) codebook including HARQ-ACK information bits corresponding to the DCI, and send the HARQ-ACK codebook to the base station, wherein the position of the HARQ-ACK information bit corresponding to the DCI in the HARQ-ACK codebook is the same as that for the corresponding SPS PDSCH reception with the lowest SPS index among the multiple SPS PDSCH releases.

[0017] According to another aspect of the present disclosure, a base station is provided. The base station includes: a transceiver configured to receive and send signals; and a controller configured to: send downlink control information (DCI) indicating the release of multiple semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs) to a terminal, and receive a hybrid automatic repeat request acknowledgment (HARQ-ACK) codebook including HARQ-ACK information bits corresponding to the DCI from the terminal, wherein the position of the HARQ-ACK information bit corresponding to the DCI in the HARQ-ACK codebook is the same as that received by the corresponding SPS PDSCH with the lowest SPS index among the multiple SPS PDSCH releases.

[0018] Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses various embodiments of the disclosure.

[0019] Technical Effects

[0020] According to various embodiments of the present disclosure, radio resources may be efficiently used, and various services may be efficiently provided to users according to priorities. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:

[0022] Figure 1 is a diagram illustrating a transmission structure in a time-frequency domain as a radio resource region of a 5th generation (5G) or new radio (NR) system according to an embodiment of the present disclosure;

[0023] Figure 2 is a diagram illustrating an example of allocating data for enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), and mMTC in a time-frequency resource region in a 5G or NR system according to an embodiment of the present disclosure;

[0024] Figure 3 is a diagram illustrating an unauthorized transmission and reception operation according to an embodiment of the present disclosure;

[0025] Figure 4 is a diagram illustrating a semi-static hybrid automatic repeat request (HARQ)-acknowledgement (ACK) codebook configuration method in an NR system according to an embodiment of the present disclosure;

[0026] Figure 5 is a diagram illustrating a method for configuring a dynamic HARQ-ACK codebook in an NR system according to an embodiment of the present disclosure;

[0027] Figure 6 is a diagram illustrating a HARQ-ACK transmission process for downlink (DL) semi-persistent scheduling (SPS) according to an embodiment of the present disclosure;

[0028] Figure 7 is a block diagram illustrating a process according to an embodiment of the present disclosure, in which a terminal transmits downlink control information (DCI) for indicating deactivation of a physical downlink shared channel (PDSCH), and HARQ-ACK information based on a quasi-static HARQ-ACK codebook for semi-persistent scheduling (SPS);

[0029] Figure 8 is a block diagram illustrating a method for a terminal to determine a dynamic HARQ-ACK codebook for SPS PDSCH reception according to an embodiment of the present disclosure;

[0030] Figure 9 is a block diagram illustrating a method for a terminal to transmit HARQ-ACK information according to a downlink (DL) SPS transmission period according to an embodiment of the present disclosure;

[0031] Figure 10 is a block diagram for concurrently operating terminals for dynamically changing a DL SPS transmission period according to an embodiment of the present disclosure;

[0032] Figure 11 is a diagram illustrating a method of transmitting HARQ-ACK information for SPS release of a terminal in a case where two or more DL SPSs are activated according to an embodiment of the present disclosure;

[0033] Figure 12 is a view illustrating an unauthorized operation in a case where a terminal is connected to two or more transmission and reception points (TRPs) according to an embodiment of the present disclosure;

[0034] Figure 13 is a block diagram illustrating a structure of a terminal capable of executing the embodiment according to an embodiment of the present disclosure; and

[0035] Figure 14 is a block diagram illustrating a structure of a base station capable of performing the embodiments according to an embodiment of the present disclosure.

[0036] Throughout the drawings, like reference numerals will be understood to refer to like parts, components and structures. DETAILED DESCRIPTION

[0037] The following description, with reference to the accompanying drawings, is provided to assist in a comprehensive understanding of the various embodiments of the present disclosure as defined by the claims and their equivalents. It includes various specific details to assist in understanding, but these are to be considered merely as examples. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the various embodiments described herein without departing from the scope and spirit of the present disclosure. In addition, descriptions of well-known functions and configurations may be omitted for clarity and conciseness.

[0038] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of the present disclosure is provided for illustration purposes only and not for the purpose of limiting the present disclosure as defined by the appended claims and their equivalents.

[0039] It is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component surface" includes reference to one or more of such surfaces.

[0040] When describing the present disclosure as an embodiment, descriptions related to technical contents well known in the art and not directly related to the present disclosure will be omitted.

[0041] For the same reason, in the accompanying drawings, some elements may be enlarged, omitted or schematically illustrated. In addition, the size of each element does not fully reflect the actual size. In the drawings, identical or corresponding elements are provided with the same reference numerals.

[0042] The advantages and features of the present disclosure and methods for achieving the same will become apparent with reference to the embodiments described in detail below in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments set forth herein, but may be implemented in a variety of different forms. The following embodiments are provided solely 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 solely by the scope of the appended claims. Throughout the specification, identical or similar reference numerals designate identical or similar elements.

[0043] Here, it will be understood that each block in the flowchart illustration, and the combination of blocks in the flowchart illustration, can be implemented by computer program instructions. These computer 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, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more flowchart blocks. These computer program instructions can also be stored in a computer-usable or computer-readable memory, which can direct the computer or other programmable data processing device to operate in a specific manner so that the instructions stored in the computer-usable or computer-readable memory produce an article of manufacture, which includes the instruction means for implementing the functions specified in one or more flowchart blocks. The computer program instructions can also be loaded onto a computer or other programmable data processing device to cause a series of operations to be performed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide operations for implementing the functions specified in one or more flowchart blocks.

[0044] In addition, each block of the flowchart diagram can represent a module, segment or part of code that includes one or more executable instructions for implementing one or more specified logical functions. It should also be noted that in some alternative embodiments, the functions marked in the blocks may not occur in order. For example, depending on the functions involved, two blocks shown in succession may in fact be executed substantially simultaneously, or multiple blocks may sometimes be executed in reverse order.

[0045] As used in this article, "unit" refers to software element or hardware element, for example, an existing field programmable gate array (FPGA) or an application specific integrated circuit (ASIC) that performs a predetermined function. However, "unit" does not always have the meaning limited to hardware or software. "Unit" can be constructed to be stored in an addressable storage medium or to run one or more processors. Therefore, "unit" includes for example software element, object-oriented software element, class element or task element, process, function, attribute, procedure, subroutine, program code segment, driver, firmware, microcode, circuit, data, database, data structure, table, array and parameter. The element and function provided by "unit" can be combined into a smaller number of elements, or "unit", or be divided into a larger number of elements, or "unit". Moreover, element and "unit" can be embodied as one or more CPUs in a production device or a secure multimedia card. Moreover, "unit" in an embodiment can include one or more processors.

[0046] Wireless communication systems are evolving toward broadband wireless communication systems for providing high-speed and high-quality packet data services as well as typical voice-based services using communication standards 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), LTE-Advanced (LTE-A), High Speed ​​Packet Data (HRPD) of 3GPP2, Ultra Mobile Broadband (UMB), IEEE 802.16e, etc. Furthermore, 5G or new radio communication standards are being established as fifth-generation wireless communication systems.

[0047] As a representative example of a broadband wireless communication system, the 5G or NR system adopts an orthogonal frequency division multiplexing (OFDM) scheme in the downlink (DL) and uplink (UL). More specifically, a cyclic prefix OFDM (CP-OFDM) scheme is adopted in the downlink, and in addition to CP-OFDM, a discrete Fourier transform spread OFDM (DFT-S-OFDM) scheme is adopted in the uplink. The uplink refers to a radio link through which a terminal sends data or a control signal to a base station, and the downlink refers to a radio link through which a base station sends data or a control signal to a terminal. In this multiple access method, the data or control information of each user is generally divided by allocation and operation so that the time-frequency resources of the data or control information to be carried for each user do not overlap, that is, orthogonality is established.

[0048] 5G or NR systems use a hybrid automatic repeat request (HARQ) scheme, which retransmits the corresponding data at the physical layer when a decoding failure occurs during initial transmission. In the HARQ scheme, when the receiver fails to correctly decode the data, the receiver sends information (negative acknowledgment (NACK)) to the transmitter to notify the transmitter of the decoding failure, so that the transmitter can retransmit the corresponding data at the physical layer. The receiver improves data reception performance by combining the data retransmitted by the transmitter with the previously decoded data. In addition, when the receiver correctly decodes the data, the receiver can send information (ACK) indicating the decoding success to the transmitter, allowing the transmitter to send new data.

[0049] Meanwhile, the NR system is a new 5G communication system designed to allow multiple services to be freely multiplexed on time and frequency resources. Therefore, waveforms, parameter sets, reference signals, etc. can be dynamically or freely allocated depending on the needs of the corresponding services. Meanwhile, in the 5G or NR system, the supported service types can be divided into categories such as enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low-latency communication (URLLC). eMBB is high-speed transmission of high-capacity data, mMTC is a service designed to minimize terminal power and access multiple terminals, and URLLC is designed for high reliability and low latency. Depending on the type of service applied to the terminal, different requirements may apply.

[0050] In the present disclosure, each term is defined in consideration of each function, and the function may vary according to the intention or practice of the user or operator. Therefore, it should be defined according to the content throughout this description. In the following, the base station is the main body that performs resource allocation of the terminal, and may be at least one of a gNode B (gNB), an eNode B (eNB), a Node B, a base station (BS), a wireless access unit, a base station controller, or a node on the network. The terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing a communication function. In the following, the NR system will be described as an example in the present disclosure, but is not limited thereto, and the embodiments of the present disclosure can be applied to various communication systems with similar technical backgrounds or channel types. In addition, by the judgment of a person with skilled technical knowledge, the embodiments of the present disclosure can be applied to other communication systems through some modifications within the scope that does not significantly deviate from the scope of the present disclosure.

[0051] In this disclosure, the terms physical channels and signals of the related art may be used interchangeably with data or control signals. For example, the physical downlink shared channel (PDSCH) is a physical channel for transmitting data, but in this disclosure, the PDSCH may be referred to as data. In other words, PDSCH transmission and reception can be understood as data transmission and reception.

[0052] In the present disclosure, higher signaling (or higher signal, or it can be used interchangeably with higher signal, high-layer signal, and high-layer signaling) is a signal transmission method that is sent from a base station to a terminal using a downlink data channel of a physical layer or from a terminal to a base station using an uplink data channel of a physical layer, and may also be referred to as radio resource control (RRC) signaling or a medium access control (MAC) control element (CE).

[0053] With the recent progress in research on 5G communication systems, various methods for scheduling communications with terminals are being discussed. Consequently, efficient scheduling and data transmission / reception methods that take into account the characteristics of 5G communication systems are needed. Therefore, in order to provide users with multiple services in communication systems, methods and devices using these methods are needed that can provide each service within the same time period according to its characteristics.

[0054] The terminal should receive separate control information from the base station to send or receive data to the base station. However, in the case of periodically generated services or service types that require low latency and / or high reliability, data may be sent or received without separate control information. In the present disclosure, this transmission method is referred to as a data transmission method based on configuration authorization (configuration authorization or no authorization or configuration scheduling). The method of receiving or sending data after configuring the data transmission resource configuration and receiving relevant information via control information can be referred to as the first signal transmission / reception type, and the method of sending or receiving data based on pre-configuration information without control information can be referred to as the second signal transmission / reception type. For the second signal transmission / reception type, there are periodically predetermined resource areas, and there are uplink (UL) type 1 authorizations and uplink (UL) type 2 authorizations (or semi-persistent scheduling (SPS)). The UL type 2 authorization is a method configured only according to the higher signal. The UL type 2 authorization can be a combination of the higher signal and the L1 signal (i.e., downlink control information (DCI)) in these areas. In the case of UL type 2 authorization (or SPS), some information is the higher signal, and whether the actual data is sent is determined by the L1 signal. Here, the L1 signal can be largely divided into a signal indicating activation of resources configured by a higher signal, which again indicates release of activated resources.

[0055] In the case where the DL SPS transmission period is aperiodic or less than 1 time slot, the present disclosure includes a method for determining a corresponding semi-static HARQ-ACK codebook and dynamic HARQ-ACK, and a method for transmitting HARQ-ACK information.

[0056] Figure 1 is a diagram illustrating a transmission structure in a time-frequency domain as a radio resource region of a 5G or NR system according to an embodiment of the present disclosure;

[0057] refer to Figure 1 , the horizontal axis in the radio resource region represents the time domain, while the vertical axis represents the frequency domain. The minimum transmission unit in the time domain is the OFDM symbol. Set N symbOFDM symbols 102 constitute a time slot 106. The length of a subframe can be defined as 1.0 ms, and a radio frame can be defined as 10 ms. The minimum transmission unit in the frequency domain is a subcarrier, and the entire system transmission bandwidth can include a total of N BW subcarriers 104. However, these specific values ​​may be variably applied depending on the system.

[0058] The basic unit in the time-frequency resource region is a resource element (RE) 112 and can be indicated by an OFDM symbol index and a subcarrier index. A resource block (RB) 108 can be defined as N in the frequency domain. RB 110 consecutive subcarriers.

[0059] Typically, the minimum data transmission unit is the RB unit. In 5G or NR systems, Nsymb = 14 and NRB = 12 are usually used, and N BW It may be proportional to the bandwidth of the system transmission band. The data rate increases in proportion to the number of RBs scheduled for the terminal. In a 5G or NR system, in the case of an FDD system that operates by dividing the downlink and uplink into frequencies, the downlink transmission bandwidth and the uplink transmission bandwidth may be different. The channel bandwidth represents the radio frequency bandwidth corresponding to the system transmission bandwidth. Table 1 below shows the correspondence between the system transmission bandwidth and the channel bandwidth defined in the LTE system, which is the 4G wireless communication before the 5G or NR system. For example, in an LTE system with a 10MHz channel bandwidth, the transmission bandwidth consists of 50 RBs.

[0060] [Table 1]

[0061]

[0062] In 5G or NR systems, a wider channel bandwidth can be used than that of LTE shown in Table 1. Table 2 shows the correspondence between the system transmission bandwidth, channel bandwidth, and subcarrier spacing (SCS) in 5G or NR systems.

[0063] [Table 2]

[0064]

[0065] In a 5G or NR system, scheduling information for downlink data or uplink data is transmitted from a base station to a terminal via downlink control information (DCI). DCI is defined according to various formats, and each format may indicate whether the DCI is scheduling information for uplink data (UL grant) or scheduling information for downlink data (downlink grant), whether the DCI is compact DCI with a small control information size, whether spatial multiplexing using multiple antennas is applied, whether the DCI is used for power control, and the like. For example, DCI format 1_1, which is scheduling control information (downlink grant) for downlink data, may include at least one of the following control information.

[0066] -Carrier indicator: Indicates which frequency carrier is being transmitted.

[0067] -DCI format indicator: an indicator that distinguishes whether the corresponding DCI is for downlink or uplink.

[0068] - Bandwidth Part (BWP) indicator: Indicates which BWP is being sent.

[0069] - Frequency domain resource allocation: Indicates the frequency domain RBs allocated for data transmission. The resources to be expressed are determined according to the system bandwidth and resource allocation method.

[0070] -Time domain resource allocation: Indicates which OFDM symbol in which time slot the data-related channel is to be sent.

[0071] - VRB to PRB mapping: Indicates how to map virtual RB indices and physical RB (PRB) indices.

[0072] - Modulation and Coding Scheme (MCS): Indicates the modulation scheme and coding rate used for data transmission. In other words, in addition to information about whether it is Quadrature Phase Shift Keying (QPSK), 16-QAM, 64QAM, or 256QAM, it can also indicate a coding rate value that can indicate the transport block size (TBS) and channel coding information.

[0073] -Code Block Group (CBG) transmission information: When CBG retransmission is configured, information indicating which CBG is transmitted.

[0074] -HARQ process number: indicates the HARQ process number.

[0075] - New data indicator: indicates whether it is HARQ initial transmission or retransmission.

[0076] - Redundancy version: indicates the redundancy version of HARQ.

[0077] -Physical Uplink Control Channel (PUCCH) Resource Indicator (PUCCH Resource Indicator): Indicates the PUCCH resource for transmitting ACK / NACK information for downlink data.

[0078] -PDSCH to HARQ feedback timing indicator: indicates the time slot in which ACK / NACK information for downlink data is transmitted.

[0079] - Transmit Power Control (TPC) Command for PUCCH: indicates a transmit power control command for the uplink control channel PUCCH.

[0080] In the case of physical uplink shared channel (PUSCH) transmission, time domain allocation can be transmitted through information about the time slot in which the PUSCH is transmitted and the number of OFDM symbols L mapped to the starting OFDM symbol position S and the PUSCH in the corresponding time slot. The above S can be a 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 according to the start and length indicator value (SLIV) defined as follows.

[0081] If(L-1)≤7then

[0082] SLIV=14*(L-1)+S

[0083] else

[0084] SLIV=14*(14-L+1)+(14-1-S)

[0085] where 0 <L≤14-S

[0086] In a 5G or NR system, the terminal may be configured with a table including SLIV, PUSCH mapping type, and information about the time slot in which PUSCH is transmitted in a row via RRC configuration. Thereafter, the base station may transmit information about SLIV, PUSCH mapping type, and the time slot through which PUSCH is transmitted by indicating the index value in the table configured in the time domain resource allocation of the DCI. This method is also applicable to PDSCH.

[0087] Specifically, when the base station indicates to the terminal the time resource allocation field index m included in the DCI that schedules the PDSCH, this indicates a combination of demodulation reference signal (DMRS) type A position information corresponding to m+1 in the table representing time domain resource allocation information, PDSCH mapping type information, time slot index K0, data resource start symbol S, and data resource allocation length L. As an example, Table 3 below is a table including PDSCH time domain resource allocation information based on a normal cyclic prefix.

[0088] [Table 3]

[0089]

[0090] In Table 3, dmrs-typeA-Position is a field indicating the symbol position of DMRS in a time slot indicated by the system information block (SIB), which is one of the terminal common control information. The possible values ​​of this field are 2 or 3. When the number of symbols constituting a time slot is 14 and the first symbol index is 0, 2 represents the third symbol and 3 represents the fourth symbol. In Table 3, PDSCH mapping type is information indicating the position of DMRS in the scheduled data resource area. When the PDSCH mapping type is A, DMRS is always transmitted / 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 is transmitted / received via DMRS in the first symbol in the data time domain resources of the always allocated position. In other words, PDSCH mapping type B does not use dmrs-typeA-Position information.

[0091] In Table 3, K0 represents the offset between the time slot index to which the PDCCH to which the DCI is sent belongs and the time slot index to which the PDSCH or PUSCH scheduled in the DCI belongs. For example, when the time slot index of the PDCCH is n, the time slot index of the PDSCH or PUSCH scheduled by the DCI of the PDCCH is n+K0. In Table 3, S represents the starting symbol index of the data time domain resource within a time slot. Based on the normal cyclic prefix, the possible S values ​​range from 0 to 13. In Table 3, L represents the data time domain resource interval length within a time slot. The possible values ​​of L range from 1 to 14.

[0092] In 5G or NR systems, PUSCH mapping types are defined as Type A and Type B. In PUSCH mapping type A, the first OFDM symbol in a DMRS OFDM symbol is located in the second or third OFDM symbol in a time slot. In PUSCH mapping type B, the first OFDM symbol in a DMRS OFDM symbol is located in the first OFDM symbol in the time domain resources allocated by PUSCH transmission. The aforementioned PUSCH time domain resource allocation method can also be applied to PDSCH time domain resource allocation.

[0093] DCI can be transmitted on the PDCCH (or control information, hereinafter these terms are used interchangeably) as a downlink physical control channel through channel coding and modulation. Generally speaking, DCI is independently scrambled with a radio network temporary identifier (RNTI) specific to each terminal, and a cyclic redundancy check (CRC) is added. After channel coding, it is configured and transmitted on each PDCCH. The PDCCH is transmitted using a control resource set (CORESET) mapped to the terminal.

[0094] Downlink data may be transmitted on the PDSCH, which is a physical channel for downlink data transmission. The PDSCH may be transmitted after a control channel transmission period, and scheduling information such as a specific mapping position in the frequency domain and a modulation method may be determined based on the DCI transmitted via the PDCCH.

[0095] In the control information constituting the DCI, the base station notifies the terminal of the modulation method applied to the PDSCH to be transmitted and the size of the data to be transmitted (transport block size, TBS) via the MCS. In one embodiment, the MCS may consist of 5 bits or more or less. The TBS corresponds to the size of the data to be transmitted by the base station before channel coding for error correction is applied.

[0096] In the present disclosure, a transport block may include a MAC header, a MAC CE, one or more MAC service data units (SDUs), and padding bits. Alternatively, a TB may indicate a data unit or a MAC protocol data unit sent from the MAC layer to the physical layer.

[0097] The modulation schemes supported by the 5G or NR system are QPSK, 16QAM, 64QAM, and 256QAM, and each modulation order (Qm) corresponds to 2, 4, 6, and 8. That is, 2 bits can be transmitted per symbol for QPSK modulation, 4 bits can be transmitted per OFDM symbol for 16QAM modulation, 6 bits can be transmitted per symbol for 64QAM modulation, and 8 bits can be transmitted per symbol for 256QAM modulation.

[0098] When the PDSCH is scheduled by DCI, HARQ-ACK information indicating whether the PDSCH is successfully decoded or failed is transmitted from the terminal to the base station via 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 that schedules the PDSCH, and the values ​​of the PDSCH-to-HARQ feedback timing indicator, which are mapped to 1 to 3 bits respectively, are configured by the higher signal as shown in Table 4. When the PDSCH-to-HARQ feedback timing indicator indicates k, the terminal transmits the HARQ-ACK information in the k time slots after the time slot n in which the PDSCH is transmitted, that is, in the time slot n+k.

[0099] [Table 4]

[0100]

[0101] When the PDSCH-to-HARQ feedback timing indicator is not included in the DCI format 1_1 for scheduling PDSCH, the terminal sends HARQ-ACK information in time slot n+k according to the k value configured as higher signaling. When the terminal sends HARQ-ACK information on the PUCCH, the terminal uses the PUCCH resource determined based on the PUCCH resource indicator included in the DCI for scheduling PDSCH to send HARQ-ACK information to the base station. At this time, the ID of the PUCCH resource mapped to the PUCCH resource indicator can be configured via higher scheduling.

[0102] Figure 2 2 is a diagram illustrating 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 disclosure.

[0103] refer to Figure 2 , data for eMBB, URLLC, and mMTC can be allocated across the entire system frequency band 200. When URLLC data 203, 205, and 207 are generated and need to be transmitted, while eMBB data 201 and mMTC data 209 are allocated and transmitted in a specific frequency band, the transmitter can clear the portion to which eMBB data 201 and mMTC data 209 have been allocated, or transmit URLLC data 203, 205, and 207 without transmitting. In the above services, since URLLC needs to reduce latency, URLLC data can be allocated and transmitted to a portion of the resources allocated to eMBB or mMTC data. When URLLC data is additionally allocated and transmitted from resources allocated to eMBB data, eMBB data may not be transmitted from the overlapping time-frequency resources, and thus, eMBB data transmission performance may be reduced. In other words, eMBB data transmission failures may occur due to URLLC allocation.

[0104] Figure 3 is a view illustrating transmission and reception operations without authorization according to an embodiment of the present disclosure.

[0105] The terminal has a first signal transmission / reception type for performing downlink data reception according to information from the base station configured only as a higher signal, and a second signal transmission / reception type for performing downlink data reception according to transmission configuration information indicated by the higher signal and the L1 signal. In the present disclosure, SPS as the second signal type for receiving downlink data means PDSCH transmission based on no grant (non-grant) in the downlink. DL SPS can allow the terminal to receive non-grant-based PDSCH transmission via a higher signal configuration and additional configuration information indicated by DCI.

[0106] DL SPS means downlink semi-persistent scheduling and is a method in which a base station periodically sends and receives downlink data information based on information configured as higher signaling, without scheduling specific downlink control information to the terminal. DL SPS can be applied to Voice over Internet Protocol (VoIP) or periodically generated traffic situations. Alternatively, the resource configuration of DL SPS is periodic, but the actual generated data may be aperiodic. In this case, since the terminal does not know whether the actual data is generated from the periodically configured resources, the following two types of operations may be performed.

[0107] - Method 3-1: For a periodically configured DL SPS resource region, the terminal transmits HARQ-ACK information to the base station for an uplink resource region corresponding to a resource region for receiving a demodulation / decoding result of data.

[0108] -Method 3-2: For a periodically configured DL SPS resource region, when the terminal successfully detects at least DMRS or data, HARQ-ACK information is sent to the base station for the uplink resource region corresponding to the demodulation / decoding result of the received data.

[0109] -Method 3-3: For a periodically configured DL SPS resource region, when the terminal successfully decodes / demodulates (i.e., ACK occurs), HARQ-ACK information is sent to the base station for the uplink resource region corresponding to the demodulation / decoding result of the received data.

[0110] In method 3-1, even if the actual base station does not send downlink data for the DL SPS resource region, the terminal always sends HARQ-ACK information to the UL resource region corresponding to the DL SPS resource region. In method 3-2, since the base station does not know when to send data to the DL SPS resource region, it is possible to send HARQ-ACK information when the terminal knows whether to send or receive data, such as successful DMRS detection or successful CRC detection. In method 3-3, HARQ-ACK information is sent to the UL resource region corresponding to the DL SPS resource region only when the terminal successfully demodulates / decodes the data.

[0111] The terminal may always support only one of the above methods, or may support two or more. One of the above methods may be selected as a 3GPP standard or higher signal. For example, when method 3-1 is indicated as a higher signal, the terminal may be able to perform HARQ-ACK information for the corresponding DL SPS based on method 3-1. Alternatively, a method may be selected according to the DL SPS higher configuration information. For example, for DL ​​SPS advanced configuration information, when the transmission period is n time slots or more, the terminal applies method 3-1, and when the transmission period is less than n time slots, the terminal may apply method 3-3. In this example, the transmission period is given as an example, but it is possible to fully apply the applied MCS table, DMRS configuration information, resource configuration information, etc.

[0112] The terminal performs downlink data reception in the downlink resource region configured by the higher signaling. It is possible to perform activation or release of the downlink resource region configured by the higher signaling as L1 signaling.

[0113] Figure 3 The operation of DL SPS is shown in FIG. The terminal configures the next DL SPS configuration information from the higher signal.

[0114] - Periodicity: Downlink SPS transmission period

[0115] -Number of processes: The number of HARQ processes set for downlink SPS

[0116] -nrofPUCCH-AN: HARQ resource configuration information for DL ​​SPS

[0117] -mcs-table: MCS table configuration information applied to DL SPS

[0118] In the present disclosure, all DL SPS configuration information can be configured for each primary cell (Pcell) or secondary cell (Scell), and can also be configured for each BWP. In addition, it is possible to configure one or more DL SPSs for each specific cell and each BWP.

[0119] refer to Figure 3 , the terminal determines that there is no grant to transmit / receive configuration information 300 by receiving a high signal for DL ​​SPS. DL SPS can transmit / receive data to / from resource region 308 configured after receiving (302) DCI indicating activation, and cannot transmit / receive data to / from resource region 306 before receiving DCI. In addition, after receiving DCI indicating release (304), the terminal cannot receive data for resource region 310.

[0120] When the following two conditions are satisfied for SPS scheduling activation or release, the terminal verifies the DL SPS allocation PDCCH.

[0121] - Condition 1: When the CRC bits of the DCI format transmitted on the PDCCH are scrambled with the Configuration Scheduling (CS)-RNTI configured for higher signaling.

[0122] - Condition 2: When the New Data Indicator (NDI) field of the activated transport block is configured to 0.

[0123] When some of the fields constituting the DCI format transmitted to the DL SPS allocation PDCCH are the same as those shown in Table 5 or Table 6 below, the terminal determines that the information in the DCI format is valid activation or valid release of the DL SPS. As an example, when the terminal detects a DCI format including the information shown in Table 5, the terminal determines that the DL SPS is activated. As another example, when the terminal detects a DCI format including the information shown in Table 6, the terminal determines that the DL SPS has been released.

[0124] If some of the fields constituting the DCI format transmitted on the DL SPS allocation PDCCH are different from those shown in Table 5 (special field configuration information for activating DL SPS) or Table 6 (special field configuration information for releasing DL SPS), the terminal determines that the DCI format is detected as a mismatched CRC.

[0125] [Table 5]

[0126]

[0127] [Table 6]

[0128] DCI format 1_0 HARQ process number Set to all "0" Redundant version Set to "00" Modulation and coding schemes Set to all "1" Resource block allocation Set to all "1"

[0129] When the terminal receives a PDSCH but does not receive a PDCCH or a PDCCH indicating the release of an SPS PDSCH, the terminal generates a HARQ-ACK information bit corresponding thereto. In addition, at least in Rel-15 NR, the terminal does not expect to send HARQ-ACK information for receiving two or more SPS PDSCHs on one PUCCH resource. In other words, at least in Rel-15 NR, the terminal only includes HARQ-ACK information for receiving one SPS PDSCH in one PUCCH resource.

[0130] DL SPS can also be configured in PCell and SCell. The parameters that can be configured for DL ​​SPS higher signaling are as follows.

[0131] -Periodicity: DL SPS transmission period

[0132] -nrofHARQ-processes: The number of HARQ processes that can be configured for DL ​​SPS

[0133] -n1PUCCH-AN: PUCCH HARQ resources used for DL ​​SPS. The base station configures resources in PUCCH format 0 or 1.

[0134] Tables 5 to 6 above are possible fields when only one DL SPS can be configured for each cell or for each BWP. When multiple DL SPSs are configured for each cell and for each BWP, the DCI fields used to activate (or release) each DL SPS resource may vary. The present disclosure provides a method to solve this situation.

[0135] In the present disclosure, not all DCI formats described in Table 5 and Table 6 are used to activate or release DL SPS resources, respectively. For example, DCI format 1_0 and DCI format 1_1 used for scheduling PDSCH can be used to activate DL SPS resources. For example, DCI format 1_0 used for scheduling PDSCH can be used to release DL SPS resources.

[0136] Figure 4 The present invention is a diagram illustrating a semi-static hybrid automatic repeat request (HARQ)-acknowledgement (ACK) codebook configuration method in a NR system according to an embodiment of the present disclosure.

[0137] In the case where the number of HARQ-ACK PUCCHs that the terminal can send in one time slot is limited to one, when the terminal receives a higher configuration of the semi-static HARQ-ACK codebook, the terminal reports the HARQ-ACK information for PDSCH reception or SPSPDSCH release in the time slot indicated by the value of the PDSCH-to-HARQ_feedback timing indicator field of DCI format 1_0 or DCI format 1_1 using the HARQ-ACK codebook. The terminal reports the value of the HARQ-ACK information bit as NACK in the HARQ-ACK codebook in the time slot not indicated by the PDSCH-to-HARQ_feedback timing indicator field of DCI format 1_0 or DCI format 1_1. If the terminal receives a higher configuration of the semi-static HARQ-ACK codebook in the time slot indicated by the value of the PDSCH-to-HARQ_feedback timing indicator field of DCI format 1_0 or DCI format 1_1, the terminal reports the value of the HARQ-ACK information bit as NACK in the HARQ-ACK codebook. A，C In this case, only one SPS PDSCH release or HARQ-ACK information for one PDSCH reception is reported, and the report is scheduled by DCI format 1_0, and DCI format 1_0 includes information indicating that the counter DAI field in the Pcell is 1, then the terminal determines one SPQ PDSCH release or one HARQ-ACK codebook for receiving PDSCH.

[0138] Otherwise, the HARQ-ACK codebook determination method according to the above method is followed.

[0139] Assume that the set of PDSCH reception candidate cases in serving cell c is M A，c , M A，c This can be obtained in the following [pseudo code 1] operation.

[0140] [Begin pseudo code 1]

[0141] - Operation 1: Initialize j to 0 and M A，c Initialize to an empty set. Initialize k, which is the HARQ-ACK transmission timing index, to 0.

[0142] - Operation 2: Configure R as a set of each row in the table, which includes the time slot information, starting symbol information, number of symbols or length information to which PDSCH is mapped. If the PDSCH-capable mapping symbol indicated by each value of R is configured as a UL symbol according to the DL and UL configuration configured in the higher layer, delete the corresponding row from R

[0143] - Operation 3-1: The terminal can receive a PDSCH for unicast in a time slot. If R is not empty, add 1 to the set M. A，c .

[0144] - Operation 3-2: If the terminal can receive more than one PDSCH for unicast in one slot, the number of PDSCHs that can be allocated to different symbols in the calculated R is counted and the corresponding number is added to M A，c .

[0145] - Operation 4: Start again from operation 2 by increasing k by 1.

[0146] [End pseudo code 1]

[0147] refer to Figure 4 , take the above pseudo code 1 as Figure 4 For example, in order to perform HARQ-ACK PUCCH transmission in slot #k 408, all slot candidates capable of PDSCH-to-HARQ-ACK timing that can indicate slot #k 408 are considered. Figure 4 In the example, it is assumed that HARQ-ACK transmission is possible in slot #k 408 by a combination of PDSCH-to-HARQ-ACK timings in which PDSCHs scheduled only in slot #n (402), slot #n+1 (404), and slot #n+2 (406) are possible. In addition, considering the information indicating whether the symbol in the slot is downlink or uplink in the time slot resource configuration information of the PDSCHs that can be scheduled in slots 402, 404, and 406, respectively, the maximum number of PDSCHs that can be scheduled for each slot is derived. For example, when maximum scheduling is possible for 2 PDSCHs in slot 402, 3 PDSCHs in slot 404, and 2 PDSCHs in slot 406, the maximum number of PDSCHs included in the HARQ-ACK codebook transmitted in slot 408 is a total of 7. This is called the cardinality of the HARQ-ACK codebook.

[0148] Operation 3-2 in a specific time slot is described by the following Table 7 (for default PDSCH time domain resource allocation A of a normal CP).

[0149] [Table 7]

[0150]

[0151] Table 7 is a time resource allocation table for the terminal's default operation before the terminal receives a time resource allocation as a separate radio resource control signal. For reference, in addition to separately indicating the row index value in the RRC, the PDSCH time resource allocation value is determined by dmrs-TypeA-Position, which is a common RRC signal for the terminal. In Table 7, the end column and the sequence column are values ​​added separately for ease of description, and they may not actually exist. The end column shows the end symbol of the scheduled PDSCH, and the sequence column shows the code position value in a specific codebook in the semi-static HARQ-ACK codebook. This table applies to the time resource allocation applied in DCI format 1_0 of the common search area of ​​​​the PDCCH.

[0152] The terminal performs the following operations to determine the HARQ-ACK codebook by calculating the maximum number of non-overlapping PDSCHs in a specific time slot.

[0153] * Operation 1: Search all rows in the PDSCH time resource allocation table for the PDSCH allocation value that ends first in the time slot. Table 7 shows that row index 14 ends first. This is indicated by 1 in the Order column. In addition, other row indices that overlap with the corresponding row index 14 and at least one symbol are marked as 1x in the Order column.

[0154] * Operation 2: Then, search for the earliest ending PDSCH allocation value among the remaining row indices not shown in the order column. In Table 7, the row index is 7 and the dmrs-TypeA-Position value is 3. In addition, other row indices that overlap with the corresponding row index and at least one symbol are marked as 2x in the order column.

[0155] *Operation 3: Repeat Operation 2 and increment to indicate the order value. For example, in Table 7, search for the PDSCH allocation value that ends first among the row indices not shown in the order column. In Table 7, the row index is 6 and the dmrs-TypeA-Position value is 3. In addition, other row indices that overlap with the corresponding row index and at least one symbol are marked as 3x in the order column.

[0156] * Operation 4: When the sequence is displayed in all row indices, the process ends. In addition, the size of the corresponding sequence is the maximum number of PDSCHs that can be scheduled without time overlap in the corresponding time slot. Scheduling without time overlap means that different PDSCHs are scheduled by TDM (time division multiplexing).

[0157] In the order column of Table 7, the maximum value of the order means the HARQ-ACK codebook size of the corresponding time slot, and the order value means the HARQ-ACK codebook point where the HARQ-ACK feedback bit of the scheduled PDSCH is located. For example, the row index 16 of Table 7 means that it exists in the second code position in the semi-static HARQ-ACK codebook of size 3. When the terminal sending the HARQ-ACK feedback is as M A，c When the set of PDSCH reception candidate situations (timing of candidate PDSCH reception) in the serving cell c is obtained, M may be obtained in the [pseudo code 1] or [pseudo code 2] operation. A，c You can use M A，c To determine the number of HARQ-ACK bits to be sent by the terminal. Specifically, M A，c The HARQ-ACK codebook is configured based on the cardinality of the set.

[0158] As another example, considerations for determining a semi-static HARQ-ACK codebook (or type 1 HARQ-ACK codebook) may be as follows.

[0159] a) Set of slot timing values ​​K1 associated with active UL BWPs

[0160] a) If the UE is configured to monitor PDCCH for DCI format 1_0 on serving cell c and is not configured to monitor PDCCH for DCI format 1_1 on serving cell c, K1 is provided by the slot timing values ​​{1, 2, 3, 4, 5, 6, 7, 8} for DCI format 1_0

[0161] b) If the UE is configured to monitor PDCCH for DCI format 1_1 for serving cell c, K1 is provided by dl-DataToUL-ACK for DCI format 1_1

[0162] b) a set of row indices R of a table provided either by the default PDSCH time domain resource allocation A [6, TS 38.214] PDSCH-ConfigCommon or by the group union of a first set of row indices and a second set of row indices associated to the active DL BWP and defining the corresponding set of slot offsets K0 (if provided by PDSCH-TimeDomainResourceAllocationList in PDSCH-Config), the start and length indicators SLIV and the PDSCH mapping type for PDSCH reception as described in [6, TS 38.214]

[0163] c) About downlink SCS configuration μDL and uplink SCS configuration μ UL The ratio between It is provided by the subcarrierSpacing in BWP-Downlink and BWP-Uplink for the active DL BWP and active UL BWP respectively

[0164] d) If provided, for TDD-UL-DL-ConfigurationCommon and TDD-UL-DL-ConfigDedicated, as described in subclause 11.1

[0165] As another example, the pseudo code for HARQ-ACK codebook determination may be as follows.

[0166] [Begin pseudo code 2]

[0167] For a set of slot timing values ​​K1, the UE determines a set of opportunities M for candidate PDSCH reception or SPS PDSCH release according to the following pseudo code: A,c The position in the Type 1 HARQ-ACK codebook of the HARQ-ACK information corresponding to the SPS PDSCH release is the same as that of the corresponding SPS PDSCH reception.

[0168] Let j = 0 - the index of the timing of candidate PDSCH reception or SPS PDSCH release

[0169] set up

[0170] set up

[0171] Let c(K1) be the cardinality of set K1

[0172] Let k = 0 - the slot timing value K in the set K1 for the serving cell c 1,k The index is sorted in descending order of the time slot timing value

[0173] When k<c(K1)

[0174] if

[0175] Let n D =0-index of DL slot within UL slot

[0176] when hour

[0177] Let R be the set of rows

[0178] Let c(R) be the cardinality of R

[0179] Let r be the index of the row in the 0-set R

[0180] If time slot n U starts at the same time as or after the time slot of the active DL BWP change on serving cell c or the active UL BWP change on the PCell, and the time slot is before the time slot of the active DL BWP change on serving cell c or the active UL BWP change on the PCell

[0181] Continue;

[0182] Otherwise

[0183] When r < c(R)

[0184] If the terminal is provided with TDD-UL-DL-ConfigurationCommon or TDD-UL-DL-ConfigDedicated, and for each time slot from time slot to time slot at least one symbol of the PDSCH time resource derived from row r is configured as UL, where K 1,k is the k-th time slot timing value in set K1

[0185] R = R / r;

[0186] End if

[0187] r = r + 1;

[0188] End while

[0189] If the terminal does not indicate the ability to receive more than one unicast PDSCH per time slot and

[0190] M A,c = M A,c ∪j;

[0191] j = j + 1;

[0192] The UE does not expect to receive an SPS PDSCH release and a unicast PDSCH in the same time slot;

[0193] Otherwise

[0194] Let c(R) be the cardinality of R

[0195] Let m be the smallest last OFDM symbol index among all rows of R, determined by SLIV

[0196] When Then

[0197] Let r = 0

[0198] When r < c(R)

[0199] If for the OFDM symbol index S starting from row r, S ≤ m

[0200] - Index of the timing of the candidate PDSCH reception or SPS PDSCH release related to row r

[0201] R = R / r;

[0202]

[0203] End if

[0204] r = r + 1;

[0205] End while

[0206] M A,c = M A,c ∪ j; j = j + 1;

[0207] Let m be the smallest last OFDM symbol index among all rows of R;

[0208] End while

[0209] End if

[0210] End if

[0211] n D = n D + 1;

[0212] End while

[0213] End if

[0214] k = k + 1;

[0215] End while<O000542>

[0216] [End of Pseudocode 2] <O000545>The position of the HARQ-ACK codebook containing the HARQ-ACK information of the DCI indicating the DL SPS release in pseudo code 2 is based on the position of the received DL SPS PDSCH. For example, if the start symbol for transmitting the DL SPS PDSCH starts from the 4th OFDM symbol based on the time slot and has a length of 5 symbols, it is assumed that the HARQ-ACK information including the DL SPS release indicating the corresponding SPS release starts from the 4th OFDM symbol of the time slot in which the DL SPS release is transmitted, and the PDSCH with a length of 5 symbols is mapped, and the corresponding HARQ-ACK information is determined via the PDSCH-to-HARQ-ACK timing indicator and the PUSCH resource indicator included in the control information indicating the DL SPS release. As another example, when the start symbol for sending the DL SPS PDSCH starts from the 4th OFDM symbol based on the time slot and has a length of 5 symbols, it is assumed that the HARQ-ACK information including the DL SPS release indicating the corresponding SPS release starts from the 4th OFDM symbol of the time slot indicated by the time domain resource allocation (TDRA) of the DCI, which is the DL SPS release, is mapped to a PDSCH with a length of 5 symbols, and the corresponding HARQ-ACK information is determined by the PDSCH-to-HARQ-ACK timing indicator and PUSCH resource indicator included in the control information indicating the DL SPS release.

[0218] Figure 5 1 is a diagram illustrating a method for configuring a dynamic HARQ-ACK codebook in an NR system according to an embodiment of the present disclosure.

[0219] The terminal sends HARQ-ACK information in a PUCCH in the corresponding time slot n based on the PDSCH-to-HARQ_feedback timing value and K0 for HARQ-ACK information PUCCH transmission in time slot n for PDSCH reception or SPS PDSCH release, K0 being the PDSCH transmission time slot position information scheduled in DCI format 1_0 or 1_1. Specifically, in order to send the above-mentioned HARQ-ACK information, the terminal determines the HARQ-ACK codebook of the PUCCH sent in the time slot determined by the PDSCH-to-HARQ_feedback timing and K0 based on the DAI included in the DCI indicating the PDSCH or SPS PDSCH release.

[0220] DAI consists of a counter DAI and a total DAI. The counter DAI is information in which the HARQ-ACK information corresponding to the PDSCH scheduled in DCI format 1_0 or DCI format 1_1 indicates the position in the HARQ-ACK codebook. Specifically, the value of the counter DAI of DCI format 1_0 or 1_1 indicates the cumulative value of PDSCH reception or SPS PDSCH release scheduled by DCI format 1_0 or DCI format 1_1 in a specific cell c. The cumulative value is configured based on the PDCCH monitoring opportunity and the serving cell in which the scheduled DCI exists.

[0221] The total DAI is a value indicating the HARQ-ACK codebook size. Specifically, the total DAI value refers to the total number of previously scheduled PDSCH or SPS PDSCH releases, including the time of scheduling DCI. The total DAI is a parameter used when the HARQ-ACK information in the serving cell c in the case of carrier aggregation (CA) also includes the HARQ-ACK information of the PDSCH scheduled in another cell including the serving cell c. In other words, the total DAI parameter does not exist in a system operating with one cell.

[0222] refer to Figure 5 , showing an example of operation for DAI. Figure 5 The figure shows the changes in the values ​​of the counter DAI (C-DAI) and the total DAI (T-DAI) indicated by the DCI found for each PDCCH monitoring opportunity configured for each carrier when the terminal sends the HARQ-ACK codebook selected based on DAI to PUCCH 520 in the nth time slot of carrier 0 502 when two carriers are configured. First, in the DCI found for m=0 506, the C-DAI and T-DAI each represent a value of 1 (512). In the DCI found for m=1 (508), the C-DAI and T-DAI each represent a value of 2 (514). In the DCI for carrier 0 (C=0 502) with m=2510, the C-DAI indicates a value of 3 (516). In the DCI found for carrier 1 (c=1, 504) with m=2 (510), the C-DAI indicates a value of 4 (518). At this time, when carrier 0 and carrier 1 are scheduled at the same monitoring opportunity, T-DAI is both indicated as 4.

[0223] Figure 4 and Figure 5The HARQ-ACK codebook determination in the

[15] is operated under the condition that only one PUCCH containing HARQ-ACK information is transmitted in one time slot. This is called Mode 1. As an example of a method in which one PUCCH transmission resource is determined in one time slot, when PDSCHs scheduled with different DCIs are multiplexed and transmitted with one HARQ-ACK codebook in the same time slot, the PUCCH resource selected for HARQ-ACK transmission is determined to be the PUCCH resource indicated by the PUCCH resource field indicated in the DCI that last scheduled the PDSCH. That is, the PUCCH resource indicated by the PUCCH resource field indicated in the DCI scheduled before the DCI is ignored.

[0224] The following description defines a HARQ-ACK codebook determination method and apparatus when two or more PUCCHs containing HARQ-ACK information are transmitted in one time slot. This is referred to as Mode 2. The terminal may only be able to operate in Mode 1 (sending only one HARQ-ACK PUCCH in one time slot) or Mode 2 (sending one or more HARQ-ACK PUCCHs in one time slot). Alternatively, terminals supporting Mode 1 and Mode 2 are configured so that the base station operates only in one mode through higher signaling, or Mode 1 and Mode 2 can be implicitly determined by DCI format, RNTI, DCI specific field value, scrambling, etc. For example, the PDSCH scheduled in DCI format A and the HARQ-ACK information associated therewith are based on Mode 1, and the PDSCH scheduled in DCI format B and the HARQ-ACK information associated therewith are based on Mode 2.

[0225] The above HARQ-ACK codebook is Figure 4 Semi-static or Figure 5 The dynamic ones are determined by RRC signals.

[0226] Figure 6 is a diagram illustrating a HARQ-ACK transmission process for DL ​​SPS according to an embodiment of the present disclosure.

[0227] refer to Figure 6, Case 1 (600) shows a case where the maximum number of PDSCHs 602, 604, and 606 that can be received are mapped without overlap in terms of time resources in time slot k. For example, if the PDSCH-to-HARQ feedback timing indicator is not included in the DCI format for scheduling the PDSCH, the terminal transmits HARQ-ACK information 608 in time slot k+1 according to the value 1 configured for the higher signaling of the HARQ-ACK information. Therefore, the size of the semi-static HARQ-ACK codebook in time slot k+1 is equal to the maximum number of PDSCHs that can be transmitted in time slot k, and will be 3. In addition, if the HARQ-ACK information for each PDSCH is 1 bit, then Figure 6 The HARQ-ACK codebooks of reference numerals 600 to 608 will consist of a total of 3 bits [X, Y, Z], and X will be the HARQ-ACK information of PDSCH 602, Y will be the HARQ-ACK information of PDSCH 604, and Z will be the HARQ-ACK information of PDSCH 606. If the PDSCH is received successfully, the corresponding information will be mapped to ACK, otherwise the corresponding information will be mapped to NACK. In addition, if the actual DCI does not schedule the corresponding PDSCH, the terminal reports it as NACK. Specifically, the position of the HARQ-ACK codebook positioned according to the SLIV of the PDSCH that can be scheduled in the DCI can vary and can be determined by Table 7, [Pseudo Code 1], or [Pseudo Code 2].

[0228] Figure 6 Case 2 (610) shows HARQ-ACK transmission when DL SPS is activated. In Rel-15 NR, the minimum period of DL SPS is 10ms. In case 2 (610), the length of one time slot in the 15kHz subcarrier spacing is 1ms, so SPS PDSCH 612 will be sent in time slot n, and then SPS PDSCH 616 will be sent in time slot n+10.

[0229] After reporting the SPS period, HARQ-ACK transmission resource information, MCS table configuration, and the number of HARQ processes as a higher signal, the HARQ-ACK information of each SPS PDSCH indicates frequency resources, time resources, MCS values, etc. according to the information included in the DCI format indicating the activation of the corresponding SPS. For reference, the PUCCH resources to which the HARQ-ACK information is transmitted can also be configured as a higher signal, and the PUCCH resources have the following properties.

[0230] - The presence of frequency hopping

[0231] -PUCCH format (starting symbol, symbol length, etc.)

[0232] Here, MCS table configuration and HARQ-ACK transmission resource information may not exist. When HARQ-ACK transmission resource information is present, Rel-15 NR supports PUCCH formats 0 or 1 that can transmit up to 2 bits. However, in future releases, PUCCH formats 2, 3, or 4 with 2 bits or more may be fully supported.

[0233] Since the HARQ-ACK transmission resource information is included in the DL SPS higher signal configuration, the terminal can ignore the PUCCH resource indicator in the DCI format indicating the activation of DL SPS. Alternatively, the PUCCH resource indicator field itself may not exist in the corresponding DCI format. On the other hand, if there is no HARQ-ACK transmission resource information in the DL SPS higher signal configuration, the terminal sends the HARQ-ACK information corresponding to the DL SPS to the PUCCH resource determined in the PUCCH resource indicator of the DCI format that activates the DL SPS. In addition, the difference between the time slot in which the SPS PDSCH is sent and the time slot in which the corresponding HARQ-ACK information is sent is determined by the value indicated in the PDSCH to HARQ-ACK feedback timing indicator of the DCI format that activates the DL SPS, or if the indicator does not exist, it follows a specific value pre-configured according to the higher signal. For example, as in Figure 6 In case 2 (610), if the PDSCH to HARQ-ACK feed timing indicator is 2, 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 to which the corresponding HARQ-ACK information is transmitted may be configured as a higher signal, or the corresponding resource may be determined by the L1 signal indicating DL SPS activation. If it is assumed that up to three PDSCHs can be received, such as Figure 6 600, and the time resource of PDSCH 612 is the same as that of PDSCH 604, the position of the HARQ-ACK codebook of SPS PDSCH 612 sent to PUCCH 614 is located at the Yth of [XYZ].

[0234] If a DCI indicating a DL SPS release is sent, the terminal should send the HARQ-ACK information of the DCI to the base station. However, in the case of a quasi-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 time slot interval (PDSCH to HARQ-ACK feedback timing) between the PDSCH and the HARQ-ACK indicated by the L1 signal or a higher signal, as described above in this disclosure. Therefore, when the DCI indicating a DL SPS release is sent to the semi-static HARQ-ACK codebook, specific rules are required instead of arbitrarily determining the position in the HARQ-ACK codebook, and in Rel-15 NR, the position of the HARQ-ACK information of the DCI indicating a DL SPS release is mapped in the same manner as the transmission resource region of the corresponding DL SPS PDSCH. As an example, Figure 6 Case 3 (620) shows a case where DCI 622 indicating the release of the activated DL SPS PDSCH is transmitted in time slot n. When the PDSCH to HARQ-ACK feedback timing indicator included in the DCI 622 format indicates 2, the HARQ-ACK information of DCI 622 will be transmitted to PUCCH 623 of time slot n+2. It is assumed that the position of the HARQ-ACK codebook is to schedule the predetermined SPS PDSCH in time slot n, and the terminal maps and transmits the HARQ-ACK information of DCI 622 indicating the release of DL SPS in the HARQ-ACK codebook position corresponding to the SPS PDSCH. In this regard, the following two methods are possible, and the base station and the terminal will transmit and receive the corresponding DCI in at least one method according to the standard or base station configuration.

[0235] *Method 6-1-1: DCI transmission indicating release of DL SPS only in a time slot in which a preset SPS PDSCH is to be transmitted.

[0236] For example, as in Figure 6 In case 3 (620), if the SPS PDSCH is configured to be transmitted in time slot n, the terminal transmits DCI 622 indicating the release of the SPS PDSCH and the HARQ-ACK information therefor only in time slot n. Assuming that the SPS PDSCH is transmitted, the position of the time slot in which the HARQ-ACK information is transmitted is the same as the position of the determined time slot. In other words, when the time slot in which the HARQ-ACK information of the SPS PDSCH is transmitted is n+2, the time slot in which the HARQ-ACK information of the DCI indicating the release of the DL SPS PDSCH is transmitted is also n+2.

[0237] *Method 6-1-2: Regardless of the time slot in which the SPS PDSCH is transmitted, DCI indicating the release of the downlink DL SPS in any time slot is transmitted.

[0238] For example, Figure 6 In case 3 (620), assuming that SPS PDSCH is transmitted in time slots n, n+10, n+20, ..., the base station transmits DCI 624 indicating DL SPS PDSCH release in time slot n+3, and when the value indicated in the PDSCH to HARQ-ACK feedback timing indicator included in the DCI is 1 or there is no corresponding field, when the value previously configured as a higher signal is 1, HARQ-ACK information 626 of the DCI indicating DL SPS PDSCH release is transmitted / received in time slot n+4.

[0239] There may be cases where the minimum period of DL SPS becomes shorter than 10ms. For example, if different devices in a factory have data that requires high reliability and low latency over the air, and the transmission period of the corresponding data is constant and the period itself is short, it should be shorter than 10ms. Therefore, the DL SPS transmission period can be determined in units of time slots, symbols, or symbol groups, regardless of the subcarrier spacing, rather than in units of ms. For reference, the minimum transmission period of the authorized PUSCH resources configured in the UL is 2 symbols.

[0240] Figure 6Case 4 (630) shows a case where the transmission period of DL SPS is 7 symbols, which is less than time slot k. Since the transmission period is within one time slot, up to two SPS PDSCHs 632 and 634 can be transmitted in time slot k. In addition, if the HARQ-ACK information corresponding to SPS PDSCH 632 and SPS PDSCH 634 does not have a value indicated by the PDSCH to HARQ-ACK feedback timing indicator or the corresponding field included in the DCI indicating SPS activation, the HARQ-ACK information is sent in the time slot according to the value pre-configured as the higher signal. For example, if the corresponding value is 1, the terminal sends HARQ-ACK information 636 of SPS PDSCH 632 and SPS PDSCH 634 in time slot k+i. The transmission period and TDRA (time resource information for which SPS PDSCH is scheduled) should be considered as the position of the HARQ-ACK codebook included in the HARQ-ACK information. Because only one SPS PDSCH can be transmitted per time slot, the HARQ-ACK codebook position is determined based on TDRA as time resource information, regardless of the transmission period. On the other hand, if the DL SPS transmission period is less than the time slot, the TDRA and transmission period as time resource information should be considered together to determine the position of the HARQ-ACK codebook. Here, TDRA includes the transmission start symbol and length information of the SPS PDSCH. For example, when the DL SPS transmission period is 7 symbols and the start symbol index of the DL SPSPDSCH determined by TDRA is 2 and the length is 3, two DL SPS PDSCHs can exist in one time slot, such as Figure 6 In case 4 (630). That is, the first SPS PDSCH 632 is a PDSCH with OFDM symbol indices 2, 3 and 4 determined by TDRA, and the second SPS PDSCH 634 is a PDSCH with OFDM symbol indices 9, 10 and 11 taking into account TDRA and 7 symbols in the transmission period. That is, the second SPS PDSCH in the time slot has the same length as the first SPS PDSCH, but the offset will be in the form of a mobile transmission period. In summary, in order to generate or determine the semi-static HARQ-ACK codebook, the terminal uses time resource allocation information to determine the HARQ-ACK codebook position for the SPS PDSCH in one time slot when the SPS PDSCH transmission period is greater than 1 time slot, and when the SPS PDSCH transmission period is less than 1 time slot, the time resource allocation information and the SPS PDSCH transmission period are considered together.

[0241] When the SPS PDSCH transmission period is less than 1 time slot, depending on the combination of transmission period and TDRA, the SPS PDSCH may cross the time slot boundary. Figure 6 Case 6 (650) shows an example, and in this case, the base station is configured to repeatedly transmit one SPS PDSCH by dividing it into PDSCH 652 and PDSCH 654 across the time slot boundary. In this case, PDSCH 652 and PDSCH 654 can always have the same length or different lengths. In addition, the terminal only transmits one HARQ-ACK information 656 of the SPS PDSCH consisting of PDSCH 652 and PDSCH 654, and the time slot used as a reference is based on time slot k+1, in which the last repeated PDSCH 654 is transmitted.

[0242] [Example 6-1: Semi-static HARQ-ACK codebook mapping method for DCI indicating DL SPS release]

[0243] When the SPS PDSCH transmission period becomes less than 1 time slot, when the terminal sends HARQ-ACK information for DCI requesting the release of the SPS PDSCH based on the semi-static HARQ-ACK codebook, the terminal maps the HARQ-ACK codebook for the corresponding DCI using at least one of the following methods.

[0244] *Method 6-2-1: The position of the semi-static HARQ-ACK codebook for HARQ-ACK information of the DCI indicating SPS PDSCH release is the same as the position of the HARQ-ACK codebook of the SPS PDSCH located first in terms of time resources among the SPS PDSCHs received in a time slot.

[0245] When the number of SPS PDSCHs in the time slot in which the DCI indicating the SPS PDSCH release is transmitted is 2 or more, the terminal maps and transmits the HARQ-ACK information corresponding to the DCI to the semi-static HARQ-ACK codebook position for the HARQ-ACK information of the fastest SPS PDSCH in time.

[0246] -For example, if the maximum number of PDSCHs that can be transmitted / received without receiving a simultaneous PDSCH including an SPS PDSCH in a time slot in which a DCI indicating the release of an SPS PDSCH is to be transmitted is 4, the HARQ-ACK codebook size of the time slot is 4, and the HARQ-ACK information for the SPS PDSCH or PDSCH reception is mapped to each position, such as {1, 2, 3, 4}. If two SPS PDSCHs have corresponding HARQ-ACK information mapped at positions {2} and {3}, the HARQ-ACK information indicating the release of the DL SPS PDSCH is mapped to position {2}.

[0247] *Method 6-2-2: The position of the semi-static HARQ-ACK codebook for HARQ-ACK information of the DCI indicating the SPS PDSCH release is the same as the position of the HARQ-ACK codebook for the SPS PDSCH located in the last time slot in terms of time resources.

[0248] When the number of SPS PDSCHs in the time slot in which the DCI indicating the release of the SPS PDSCH is transmitted is 2 or more, the terminal maps the HARQ-ACK information corresponding to the DCI to the semi-static HARQ-ACK codebook position of the HARQ-ACK information of the last SPS PDSCH in terms of time resources and transmits it.

[0249] -For example, if the maximum number of PDSCHs that can be transmitted / received without receiving a simultaneous PDSCH including an SPSPDSCH in a time slot in which a DCI indicating the release of an SPS PDSCH is to be transmitted is 4, the HARQ-ACK codebook size of the time slot is 4, and the HARQ-ACK information for the SPS PDSCH or PDSCH reception is mapped to each position, such as {1, 2, 3, 4}. If two SPS PDSCHs have corresponding HARQ-ACK information mapped at positions {2} and {3}, the HARQ-ACK information indicating the release of the DL SPSPDSCH is mapped to position {3}.

[0250] *Method 6-2-3: The position of the semi-static HARQ-ACK codebook for HARQ-ACK information of the DCI indicating SPS PDSCH release is the same as the position of all HARQ-ACK codebooks of the SPS PDSCH received in one slot.

[0251] When the number of SPS PDSCHs in the time slot in which the DCI indicating the SPS PDSCH release is transmitted is two or more, the terminal repeatedly maps and transmits the HARQ-ACK information of the corresponding DCI to the semi-static HARQ-ACK codebook position of the HARQ-ACK information for all SPS PDSCHs.

[0252] -For example, if the maximum number of PDSCHs that can be transmitted / received without receiving a simultaneous PDSCH including an SPS PDSCH in a time slot in which a DCI indicating the release of an SPS PDSCH is to be transmitted is 4, the HARQ-ACK codebook size for the time slot is 4, and the HARQ-ACK information received by the SPS PDSCH or PDSCH will be mapped to each position such as {1, 2, 3, 4}. If two SPS PDSCHs have corresponding HARQ-ACK information mapped at positions {2} and {3}, the HARQ-ACK information indicating the release of the DL SPS PDSCH is repeatedly mapped at positions {2} and {3}. That is, the same HARQ-ACK information is mapped to positions {2} and {3}.

[0253] *Method 6-2-4: The position of the semi-static HARQ-ACK codebook for the HARQ-ACK information of the DCI indicating the SPS PDSCH release is selected by the base station as a higher signal or L1 signal or a combination thereof from multiple HARQ-ACK codebook candidate positions for the SPS PDSCH received in one time slot.

[0254] -When the number of SPS PDSCHs in the time slot in which the DCI indicating the release of the SPS PDSCH is transmitted is two or more, the base station selects a position in the semi-static HARQ-ACK codebook position of the HARQ-ACK information for the SPS PDSCH using a higher signal, an L1 signal, or a combination thereof, and the terminal transmits the HARQ-ACK information of the corresponding DCI by mapping it to the selected position.

[0255] -For example, if the maximum number of PDSCHs that can be transmitted / received without receiving a simultaneous PDSCH including an SPS PDSCH in a time slot in which a DCI indicating the release of the SPS PDSCH is to be transmitted is 4, the HARQ-ACK codebook size for the time slot is 4, and the HARQ-ACK information received by the SPS PDSCH or PDSCH will be mapped to each position, such as {1, 2, 3, 4}. If two SPS PDSCHs are mapped to corresponding HARQ-ACK information at positions {2} and {3}, respectively, the base station selects {2} using the DCI indicating the release of the DL SPS PDSCH, and the terminal transmits by mapping the HARQ-ACK information indicating the release of the DL SPS PDSCH to position {2}. The DCI field used to determine the position of the quasi-static HARQ-ACK codebook may be a time resource allocation field, a HARQ process number, or a PDSCH-to-HARQ feedback timing indicator. For example, the time resource allocation field in the DCI indicating the release of the SPS PDSCH may indicate the time resource information of the SPS PDSCH of one of the SPS PDSCHs that may be transmitted in the corresponding time slot, and the terminal may send the HARQ-ACK information of the DCI to the position of the semi-static HARQ-ACK codebook corresponding to the indicated SPS PDSCH.

[0256] *Method 6-2-5: The location of the quasi-static HARQ-ACK codebook used to indicate the HARQ-ACK information of the DCI released by the SPS PDSCH is indicated or configured by the base station through a higher signal, an L1 signal, or a combination thereof.

[0257] -If the maximum number of PDSCHs that can be received without overlapping time in the time slot in which the DCI indicating the release of the SPS PDSCH is transmitted is two or more, then the base station selects a position as the upper signal, L1 signal, or a combination thereof in the semi-static HARQ-ACK codebook position of the HARQ-ACK information for the corresponding PDSCH, and the terminal maps and transmits the corresponding DCI HARQ-ACK information at the selected position.

[0258] -The set of semi-static HARQ-ACK codebook positions selectable by the base station through method 6-2-4 consists of the semi-static HARQ-ACK codebook positions to which the HARQ-ACK information of the SPS PDSCH can be mapped. The set of semi-static HARQ-ACK codebook positions selectable by the base station through method 6-2-5 consists of the semi-static HARQ-ACK codebook positions to which the HARQ-ACK information of all PDSCHs can be mapped.

[0259] For example, if the maximum number of PDSCHs that can be transmitted / received in the time slot in which the DCI indicating the release of the SPS PDSCH is to be transmitted is 4 without receiving the simultaneous PDSCH including the SPS PDSCH, the size of the HARQ-ACK codebook for the corresponding time slot is 4, and the HARQ-ACK information for SPS PDSCH or PDSCH reception will be mapped to each position such as {1, 2, 3, 4}. The base station selects {1} using the DCI indicating the release of the DL SPS PDSCH, and the terminal transmits the HARQ-ACK information indicating the release of the DL SPS PDSCH by mapping it to position {1}. The DCI field used to determine the position of the quasi-static HARQ-ACK codebook may be a time resource allocation field, a HARQ process number, or a PDSCH-to-HARQ feedback timing indicator. For example, the time resource allocation field in the DCI indicating the SPS PDSCH release indicates the time resource information of one PDSCH among the PDSCHs that can be transmitted in the corresponding time slot, and the terminal sends the HARQ-ACK information of the DCI to the position of the semi-static HARQ-ACK codebook corresponding to the indicated PDSCH.

[0260] The above method will be possible when only one HARQ-ACK transmission is supported in a time slot. When code block group (CBG)-based transmission is configured for a higher signal through DL SPS PDSCH, the terminal can repeatedly map the HARQ-ACK information of the DCI indicating the release of DL SPS PDSCH according to the number of CBGs and send it to the semi-static HARQ-ACK codebook resources determined by at least one of the above methods. Although the above method is described as a method for sending HARQ-ACK information of DL SPS PDSCH for indicating the release of one SPSPDSCH transmission / reception, it may be fully possible to send HARQ-ACK information of DL SPSPDSCH for indicating the simultaneous release of two or more activated PDSCH transmissions / receptions in one cell / one BWP without increasing or decreasing. For example, when a DL SPS PDSCH release signal is associated with multiple SPS PDSCHs activated in one cell / one BWP, the SPS PDSCH considered for HARQ-ACK codebook position selection may be an SPS PDSCH belonging to one configuration or all configurations as a representative. At this time, if the SPS PDSCH belongs to the representative configuration, the representative configuration may be the lowest SPS PDSCH configuration number or the first activated SPS PDSCH configuration. This is just an example, and other similar methods are also possible.

[0261] [Example 6-2: Dynamic HARQ-ACK Codebook Mapping Method for Multiple SPS PDSCHs Transmitted in One Time Slot]

[0262] In the dynamic HARQ-ACK codebook (or type 2 HARQ-ACK codebook), the position of the corresponding DL information is determined by the total DAI and the counter DAI included in the DCI used to schedule the PDSCH. The total DAI indicates the size of the HARQ-ACK codebook transmitted in time slot n, and the counter DAI indicates the position of the HARQ-ACK codebook transmitted in time slot n. Next, in Rel-15 NR, the dynamic HARQ-ACK codebook is configured by [Pseudo-code 3].

[0263] [Start of Pseudo-code 3]

[0264] If the terminal transmits HARQ-ACK information in the PUCCH in time slot n, and for any PUCCH format, for the total number of O ACK HARQ-ACK information bits, the terminal determines according to the following pseudo-code

[0265] Let m = 0 - Index of the PDCCH monitoring occasion with DCI format 1_0 or DCI format 1_1: The lower index corresponds to the earlier PDCCH monitoring occasion with DCI format 1_0 or DCI format 1_1

[0266] Let j = 0

[0267] Let V temp = 0

[0268] Let V temp2 = 0

[0269] Let ​​​​​​​​​​​​​​​​​​​​If PDCCH monitoring occasion m precedes the active DL BWP change on serving cell c or the active UL BWP change on PCell, and the active DL BWP change is not triggered by DCI format 1_1 in PDCCH monitoring occasion m

[0276] c=c+1;

[0277] otherwise

[0278] If there is a PDSCH on serving cell c associated with the PDCCH in PDCCH monitoring time m, or there is a PDCCH indicating the release of the SPS PDSCH on serving cell c

[0279] if

[0280] j=j+1

[0281] End if

[0282]

[0283] if

[0284]

[0285] otherwise

[0286]

[0287] End if

[0288] If harq-ACK-SpatialBundlingPUCCH is not provided, and m is a monitoring occasion of PDCCH with DCI format 1_0 or DCI format 1_1, and the UE is configured with maxNrofCodeWordsScheduledByDCI for reception of two transport blocks with at least one configured DLBWP for at least one serving cell,

[0289]

[0290]

[0291]

[0292] Otherwise, if the UE is provided with harq-ACK-SpatialBundlingPUCCH, and m is a monitoring occasion of PDCCH with DCI format 1_1, and the UE is configured with maxNrofCodeWordsScheduledByDCI for reception of two transport blocks in at least one configured DL BWP of the serving cell,

[0293]

[0294] otherwise

[0295]

[0296] End if

[0297] End if

[0298] c=c+1

[0299] End if

[0300] End when...

[0301] m=m+1

[0302] End when...

[0303] If V temp2 <V tem p

[0304] j=j+1

[0305] End if

[0306] If no harq-ACK-SpatialBundlingPUCCH is provided to the UE and the UE receives maxNrofCodeWordsScheduledByDCI by two transport blocks with at least one configured DL BWP for the serving cell,

[0307] O ACK =2·(4·j+V temp2 )

[0308] otherwise

[0309] O ACK =4·j+V temp2 End if

[0310] For any

[0311] Let c = 0

[0312] when hour

[0313] If SPS PDSCH reception is activated for the UE and the UE is configured to receive data in slot nK of the serving cell c 1,c Receive SPS PDSCH, where K 1，c PDSCH-to-HARQ-feedback timing value for SPS PDSCH on serving cell c

[0314] O ACK =O ACK +1

[0315]

[0316] End if

[0317] c=c+1;

[0318] End when...

[0319] [End pseudo code 3]

[0320] When the SPS PDSCH transmission period is greater than 1 slot, [Pseudo-code 3] is applied. When the SPS PDSCH transmission period is less than 1 slot, the dynamic HARQ-ACK codebook is determined by the following [Pseudo-code 4]. Alternatively, [Pseudo-code 4] can be generally applied regardless of the SPS PDSCH transmission period or the number of SPS PDSCHs activated in a cell / a BWP.

[0321] [Begin pseudo code 4]

[0322] If the UE sends HARQ-ACK information in the PUCCH in slot n, and for any PUCCH format, for 0 ACK The total number of HARQ-ACK information bits is determined by the UE according to the following pseudo code

[0323] Let m=0-monitoring opportunity index of PDCCH with DCI format 1_0 or DCI format 1_1: lower index corresponds to earlier monitoring opportunity of PDCCH with DCI format 1_0 or DCI format 1_1

[0324] Let j = 0

[0325] Let V temp =0

[0326] Let V temp2 =0

[0327] set up

[0328] set up The number of serving cells configured by higher layers for the UE

[0329] Let M be the number of PDCCH monitoring occasions

[0330] When m < M

[0331] Let c = 0 - serving cell index: A lower index corresponds to a lower RRC index of the corresponding cell

[0332] When then

[0333] If the active DL BWP on serving cell c for PDCCH monitoring occasion m changes or the active UL BWP on the PCell changes, and the active DL BWP change is not triggered by DCI format 1_1 in PDCCH monitoring occasion m

[0334] c = c + 1;

[0335] Otherwise

[0336] If there is a PDSCH on serving cell c associated with the PDCCH in PDCCH monitoring occasion m, or there is a PDCCH indicating the release of the SPS PDSCH of serving cell c

[0337] If

[0338] j = j + 1

[0339] End if

[0340]

[0341] If

[0342]

[0343] Otherwise

[0344]

[0345] End if

[0346] If no harq - ACK - SpatialBundlingPUCCH is provided, and m is a monitoring occasion for PDCCH with DCI format 1_0 or DCI format 1_1, and the UE is configured by maxNrofCodeWordsScheduledByDCI for the reception of two transport blocks with at least one configured DLBWP for at least one serving cell

[0347]

[0348]

[0349]

[0350] Otherwise, if the UE is provided with harq-ACK-SpatialBundlingPUCCH, and m is a monitoring occasion of PDCCH with DCI format 1_1, and the UE is configured with maxNrofCodeWordsScheduledByDCI for reception of two transport blocks in at least one configured DL BWP with the serving cell,

[0351]

[0352] otherwise

[0353]

[0354] End if

[0355] End if

[0356] c=c+1

[0357] End if

[0358] End when...

[0359] m=m+1

[0360] End when...

[0361] If V temp2 <V temp

[0362] j=j+1

[0363] End if

[0364] If no harq-ACK-SpatialBundlingPUCCH is provided to the UE and the UE is configured with maxNrofCodeWordsScheduledByDCI for reception of two transport blocks with at least one configured DL BWP for the serving cell,

[0365] O ACK =2·(4·j+V temp2 )

[0366] otherwise

[0367] O ACK =4·j+V temp2

[0368] End if

[0369] For any

[0370] Let c = 0

[0371] when hour

[0372] If SPS PDSCH reception is activated for the UE and the UE is configured to receive data in slot n=K of serving cell c 1，c Receive multiple SPS PDSCHs, where K 1，c is the PDSCH-to-HARQ-feedback timing value for the SPS PDSCH on serving cell c

[0373] O ACK =O ACK +k, where k is the time slot nK 1,c The number of multiple SPS PDSCHs in

[0374]

[0375] End if

[0376] c=c+1;

[0377] End when...

[0378] [End pseudo code 4]

[0379] In the above [Pseudo Code 4], the k value, as the number of SPS PDSCHs in one slot, applies only to one SPS PDSCH configuration in one cell / one BWP, or may include all SPS PDSCH configurations when multiple SPS PDSCHs may be configured in one cell / one BWP.

[0380] [Pseudocode 3] or [Pseudocode 4] can be applied to the case where HARQ-ACK information transmission is limited to at most one per time slot.

[0381] [Example 6-3: Separate HARQ-ACK transmission method for multiple SPS PDSCHs transmitted in one slot]

[0382] When the terminal is configured to perform only one DL SPS transmission cycle of less than one time slot and one HARQ-ACK transmission per time slot from the base station according to the higher signal, the HARQ-ACK information for the DL SPS PDSCH 632 and DL SPSPDSCH 634 received in time slot k is transmitted to the PUCCH of time slot k+i pre-indicated by the higher signal or the L1 signal or a combination thereof, as shown in FIG. Figure 6As shown in Case 4 (630). For example, the terminal determines the granularity of the PDSCH to HARQ-ACK timing indicator in the DCI format indicating DL SPS activation to the time slot level, and the base station provides the terminal with the difference between the time slot index of the DL SPS PDSCH received and the PUCCH resource to which the HARQ-ACK information is transmitted in the time slot indicated by L1 as a higher signal to the terminal. Figure 6 In case 4 (630), the PDSCH to HARQ-ACK timing shows the case of indicating the value of i. It is possible to directly select the corresponding value according to the L1 signal, or configure the candidate values ​​according to the higher signal and select one of them according to the L1 signal.

[0383] When a terminal or a base station wants to separately receive and transmit HARQ-ACK information for a DL SPS PDSCH that is transmitted and received separately, the base station may be configured with a higher signal for a DL SPS transmission period of less than 1 slot and 2 or more HARQ-ACK transmissions per slot. Figure 6 In case 7 (660), the terminal transmits the HARQ-ACK information of the SPS PDSCH 662 received in time slot k through the PUCCH 666 in time slot k+i, and may transmit the HARQ-ACK information of the SPS PDSCH 664 in time slot k+i through the PUCCH 668. To achieve this, as an example, the terminal determines the granularity of the PDSCH to HARQ-ACK timing indicator in the DCI format indicating DL SPS activation as a symbol level, which 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 to which the corresponding HARQ-ACK information is transmitted. Figure 6In case 7 (660), when the end symbol of the SPS PDSCH 662 is s0 and the start symbol of the PUCCH 666 to which the HARQ-ACK information of the SPS PDSCH 662 is sent is s1, the value indicated by the PDSCH to HARQ-ACK timing indicator will be "s1-s0", which can be directly selected as the L1 signal, or the candidate values ​​can be configured as higher signals, and it may be possible to determine one of them as the L1 signal. Through the above information, the terminal can determine the start symbol of the PUCCH to which the HARQ-ACK information of the SPS PDSCH will be sent. Other PUCCH transmission information can be determined by the higher signal or the L1 signal or a combination thereof. If the PUCCH resource indicator in the L1 or higher signal of Rel-15 is used, the terminal can determine that the "start symbol index" field is not used among the values ​​indicated in the indicator. Optionally, since the starting symbol for transmitting HARQ-ACK information has been provided by the PDSCH to HARQ-ACK timing indicator information, a new higher signal without a corresponding field or a signal consisting of an L1 signal or a combination thereof can be provided to the terminal. In short, the terminal can perform different interpretations on the PDSCH to HARQ-ACK timing indicator field included in the DCI indicating the activation of the SPS PDSCH according to the SPS PDSCH transmission cycle.

[0384] -Method 6-3-1: Judging by time slot level

[0385] As an example, when the transmission period of the SPS PDSCH is greater than one time slot, the terminal determines the granularity of the PDSCH to HARQ-ACK timing indicator as a time slot level.

[0386] -Method 6-3-2: Judging by symbol level

[0387] For example, if the transmission period of the SPS PDSCH is less than 1 time slot, the terminal determines the granularity of the PDSCH to HARQ-ACK timing indicator as a symbol level.

[0388] [Example 6-4: DL SPS / CG (Configured Grant) Cycle Change Method for Aperiodic Services]

[0389] The transmission period of the DL SPS supported by the base station will be in units of time slot level or symbol level. If information that is sensitive to delay time of equipment operating in the factory appears periodically, and the period is not a value or a multiple of the value supported by the 3GPP standard group, the base station will not be able to configure a valid DL SPS transmission period. For example, if there is a business mode with a 2.5 symbol interval, the base station will not be able to allocate only a DL SPS with a transmission period of 2 or 3 symbols. Therefore, it is necessary to configure a DL SPS transmission period with a non-periodicity, or to introduce a signal that dynamically changes the transmission period. The terminal can dynamically change the transmission period by at least one of the following methods.

[0390] *Method 6-4-1: DL SPS transmission cycle allocation method with aperiodicity

[0391] The base station may be able to configure the DL SPS transmission period in a bitmap manner. For example, when a 10-bit bitmap information is present as a higher signal, if 1 indicates DL SPS transmission and 0 indicates DL SPS non-transmission, if the bit unit means the time slot unit, various patterns of DL SPS transmission periods can be created, even if it is not a period of 10 time slots. And the pattern can be repeated in units of 10 time slots. Alternatively, the bitmap size and the part indicated by the bit can be a time slot or a symbol or a symbol group. It may be possible to independently configure the corresponding information as a higher signal, or to change the range of the transmission interval indicated by each bit according to the bitmap size. For example, when the bitmap size is 20, the time range indicated by each bit is 7 symbol units, and when the bitmap size is 10, the time range indicated by each bit can be a time slot unit.

[0392] Alternatively, the base station may pre-configure two or more DL SPS transmission periods as higher signals and configure the time difference between each consecutively transmitted DL SPS as a pattern. For example, for a 2.5-symbol traffic pattern, it may be possible to determine DL SPS transmission periods with 2-symbol intervals and 3-symbol intervals. Table 8 below is a table for configuring the aperiodic DL SPS transmission period. Z is a decimal number with a value up to the first decimal point, and Z has a relationship of X < Z < X + 1. In one example, when Z is 3.2, the value of X is 3. Gap 1 means the symbol interval between the first SPS PDSCH resource received by the terminal and the second SPS PDSCH resource received after receiving the DCI indicating SPS activation. Gap 2 means the symbol interval between the second SPS PDSCH resource and the third SPS PDSCH resource thereafter. That is to say, gap i means the symbol interval between the i-th SPS PDSCH resource and the (i + 1)-th SPS PDSCH resource thereafter. Configuration is a parameter for selecting one of various patterns, and Table 8 shows the configurations of a total of 9 patterns. The corresponding parameters are provided to the terminal via a higher signal or an L1 signal, and the terminal can identify the DL SPS PDSCH transmission period pattern by the value indicated by the parameter. As another example, it may be possible to implicitly determine one of the configurations according to the traffic generation period value. As an example, if the corresponding pattern has a 2.3-symbol traffic pattern, and the base station and the terminal send and receive the corresponding information by configuring a higher signal, the base station and the terminal can determine to apply Configuration 3.

[0393] [Table 8]

[0394] Configuration 1 2 3 4 5 6 7 8 9 Gap 1 X+1 X+1 X+1 X+1 X+1 X+1 X+1 X+1 X+1 Gap 2 X X X X X X+1 X+1 X+1 X+1 Gap 3 X X X X+1 X+1 X X+1 X+1 X+1 Gap 4 X X X+1 X X X+1 X X+1 X+1 Gap 5 X X X X X+1 X X+1 X X+1 Gap 6 X X+1 X X+1 X X+1 X+1 X+1 X+1 Gap 7 X X X+1 X X+1 X+1 X X+1 X+1 Gap 8 X X X X+1 X X X+1 X+1 X+1 Gap 9 X X X X X+1 X+1 X+1 X+1 X+1 Gap 10 X X X X X X X X X

[0395] *Method 6-4-2: Dynamic DL SPS Transmission Period Change Method

[0396] - Method 6-4-2-1: The DCI indicating DL SPS activation includes transmission period information.

[0397] The DL SPS transmission period value is included in the DCI. A set of candidate values ​​is pre-configured as a higher signal for the corresponding transmission period value, and a specific value in the set is selected as the DCI. For example, 1 bit is generated in the corresponding transmission period field in the DCI in which the transmission cycle is configured as {1 time slot, 2 time slots} according to the higher signal, and whether the transmission period is 1 time slot or 2 time slots is notified in 1 bit. That is, when the number of DCI bits is determined according to the set of transmission periods configured according to the higher signal and the number of sets is N, the total number of bits of ceil(log2(N)) is configured in the DCI. The DCI corresponds to non-fallback DCI, such as DCI format 1_1, and even if there is no fallback DCI corresponding field, such as DCI format 1_0, a fixed bit value and a period value associated with each bit value can be applied.

[0398] - Method 6-4-2-2: Utilizing existing field 1 in the DCI format indicating DL SPS activation

[0399] When a field in the DCI format indicating DL SPS activation indicates a specific value, the values ​​of other fields are used to indicate a transmission period instead of the previously indicated values. For example, when all bits of the field indicating the HARQ process number indicate a value of "1," the field indicating time resource information can be used to indicate a next DL SPS transmission period from a set of DL SPS transmission periods previously configured with a higher signal.

[0400] - Method 6-4-2-3: Using existing field 2 in the DCI format indicating DL SPS activation

[0401] In the case of a DCI format indicating DL SPS activation, it is possible that a specific field in the DCI format transmission period itself always indicates the transmission period, or a specific value in a specific field of the DCI format indicates the transmission period. For example, if the time resource allocation field of the DCI format is verified to be a format indicating SPS PDSCH activation, the base station determines that the corresponding time resource allocation field is used as a value for notifying the start symbol and length of the existing SPS PDSCH, but not the value for notifying the transmission period of the SPS PDSCH.

[0402] -Method 6-4-2-4: Implicit transmission loop information configuration based on search space

[0403] The transmission cycle value changes dynamically based on the search space in which the DCI indicating DL SPS activation is transmitted. For example, the terminal may implicitly determine that the DCI indicating DL SPS activation transmitted in the common search space has a transmission cycle value of A, and that the DCI indicating DL SPS activation transmitted in the terminal-specific search space has a transmission cycle value of B. Transmission cycle A and transmission cycle B may be pre-configured by the terminal according to the higher signal.

[0404] -Method 6-4-2-5: Implicit transmission cycle information configuration based on DCI format

[0405] The transmission cycle value changes dynamically based on the DCI format indicating DL SPS activation. For example, the terminal may implicitly determine that the DCI indicating DL SPS activation sent in DCI format 1_0 (which is fallback DCI) has a transmission cycle value of A, and the DCI indicating DL SPS activation sent in DCI format 1_1 (which is non-fallback DCI) has a transmission cycle value of B. Transmission cycle A and transmission cycle B may be pre-configured by the terminal according to a higher signal.

[0406] In the present disclosure, the terminal does not expect to receive or configure DL SPS PDSCH time resource information outside the DL SPS transmission period. If a corresponding configuration or instruction is issued, the terminal will regard it as an error and ignore it.

[0407] Figure 7 1 is a block diagram illustrating a process in which a terminal transmits HARQ-ACK information based on a semi-persistent scheduling (SPS) quasi-static HARQ-ACK codebook for a DCI indicating deactivation of a semi-persistent scheduling (SPS) PDSCH according to an embodiment of the present disclosure.

[0408] The terminal receives the SPS PDSCH configuration information as a higher signal. At this time, the information configured as the higher signal may include a transmission period, an MCS table, and HARQ-ACK configuration information. After receiving the higher signal, the terminal receives (700) a DCI activating the SPS PDSCH from the base station. After receiving the DCI indicating activation, the terminal periodically receives the SPS PDSCH and sends corresponding HARQ-ACK information to the base station (702). Thereafter, when there is no more downlink data to be periodically sent / received, the base station sends a DCI indicating SPS PDSCH deactivation to the terminal, and the terminal receives it (704). The terminal sends (706) HARQ-ACK information of the DCI indicating SPS PDSCH deactivation according to the SPS PDSCH transmission period. For example, when the transmission period is greater than 1 time slot, the terminal includes and transmits the HARQ-ACK information of the DCI indicating SPS PDSCH deactivation in the HARQ-ACK codebook position for the HARQ-ACK information corresponding to the SPS PDSCH. The HARQ-ACK information can be transmitted by the above Figure 6 When the transmission period is less than one time slot, the terminal may transmit HARQ-ACK information of the DCI information indicating SPS PDSCH deactivation through at least one of methods 6-2-1 to 6-2-5. Figure 7 , is an operation applied when the terminal has previously configured the semi-static HARQ-ACK codebook from the base station at a higher signal. In addition, Figure 7 The above description is applicable only when the terminal utilizes a higher signal or standard or the terminal capability is pre-configured to allow only one HARQ-ACK transmission per time slot.

[0409] Figure 8 is a block diagram illustrating a method for a terminal to determine a dynamic HARQ-ACK codebook for SPS PDSCH reception according to an embodiment of the present disclosure.

[0410] When the terminal is previously configured to operate with a dynamic HARQ-ACK codebook at a higher signal, the terminal starts (800) determining the size of the HARQ-ACK codebook for the HARQ-ACK information to be sent in a specific time slot. The terminal 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 transmission of the HARQ-ACK information and reflects it in the HARQ-ACK codebook size (802). The terminal can Figure 6At least one of [Pseudo Code 3] or [Pseudo Code 4] described in [Pseudo Code 3] is used to configure the dynamic HARQ-ACK codebook. Thereafter, the terminal completes the determination of the size of the HARQ-ACK codebook (804) and sends HARQ-ACK information to the base station from the corresponding time slot. Figure 8 , which can only be applied when the terminal utilizes a higher signal or standard or the terminal capability is pre-configured to allow only one HARQ-ACK transmission per time slot. For reference, when Figure 6 In case 6 (650), when an SPS PDSCH is repeatedly transmitted across a time slot boundary, when determining the dynamic HARQ-ACK codebook, the terminal determines the size of the HARQ-ACK codebook based on the time slot in which the SPS PDSCH is repeatedly transmitted. Specifically, Figure 6 In case 6 (650), in the case of time slot k, SPS PDSCH 652 is transmitted, but instead of calculating the number of valid SPS PDSCHs to determine the dynamic HARQ-ACK codebook size, for SPS PDSCH 654 transmitted in time slot k+1, the terminal determines the dynamic HARQ-ACK codebook size. In addition, when determining the number of SPS PDSCHs per time slot (k) for determining the dynamic HARQ-ACK codebook size in a specific time slot in [Pseudo Code 4], the number of valid SPS PDSCHs is calculated by the time slot (or end slot) to which the end symbol of the last SPS PDSCH among the repeatedly transmitted SPS PDSCHs belongs.

[0411] Figure 9 is a block diagram illustrating a method for a terminal to transmit HARQ-ACK information according to a downlink (DL) SPS transmission period according to an embodiment of the present disclosure.

[0412] refer to Figure 9 , the terminal receives (900) a DL SPS transmission period provided by a higher signal or an L1 signal or a maximum number of HARQ-ACK information transmissions per time slot. Then, the DL SPS transmission period and the HARQ-ACK information transmission condition per time slot are identified (902). If condition 1 is satisfied, the terminal performs (904) a first type of HARQ-ACK information transmission. If condition 2 is satisfied, the terminal performs (906) a second type of HARQ-ACK information transmission. Condition 1 may be at least one of the following:

[0413] -When the transmission period of DL SPS PDSCH is greater than 1 time slot

[0414] -When only one HARQ-ACK is sent per slot

[0415] Condition 2 can be at least one of the following:

[0416] -When the transmission period of DL SPS PDSCH is less than 1 time slot

[0417] - When two or more HARQ-ACK transmissions per slot are possible

[0418] The above-mentioned first type HARQ-ACK information transmission includes the following fields of the DCI format indicating activation of the DL SPS PDSCH.

[0419] -PDSCH to HARQ-ACK feedback timing indicator: indicates the time slot interval for sending PDSCH and the time slot for sending HARQ-ACK information in time slot units. Figure 6 In case 6 (650), when an SPS PDSCH is repeatedly transmitted across a time slot boundary, the reference time slot in which the PDSCH is transmitted is the time slot of the last repeatedly transmitted SPS PDSCH.

[0420] -PUCCH resource indicator: number of symbols, start symbol, PRB index, PUCCH format, etc.

[0421] Through the above information, the terminal can configure the PUCCH transmission resources and transmission format to which the HARQ-ACK information of the DL SPS PDSCH will be sent. In addition, for the two field values, a set of values ​​can be pre-configured as the higher signal, and one of them is selected as the DCI.

[0422] The second type of HARQ-ACK information transmission includes the following fields of the DCI format indicating activation of the DL SPS PDSCH.

[0423] -PDSCH to HARQ-ACK feedback timing indicator: Indicates the end symbol interval of PDSCH and the start symbol interval of sending HARQ-ACK information in symbol units

[0424] -PUCCH resource indicator: number of symbols, PRB index, PUCCH format, etc.

[0425] Through this information, the terminal can configure the PUCCH transmission resources and transmission format to which the HARQ-ACK information of the DL SPS PDSCH is to be sent. In addition, for the two field values, a set of values ​​can be pre-configured as the higher signal, and one of them is selected as the DCI.

[0426] Figure 10 is a block diagram for concurrently operating terminals for dynamically changing a DL SPS transmission period according to an embodiment of the present disclosure.

[0427] refer to Figure 10, the terminal receives higher information of SPS PDSCH, including information such as transmission period, MCS table and HARQ-ACK information. Thereafter, the terminal receives (1000) DCI indicating SPS PDSCH activation. The terminal then sends (1002) SPS PDSCH reception and corresponding HARQ-ACK information to the base station in the resource area determined by the higher signal and the L1 signal. The terminal receives (1004) DCI indicating SPS PDSCH change information. Here, in addition to the MCS value or the frequency and time resource area size, the change information may also include the SPS PDSCH transmission period value. For reference, by the above Figure 6 At least one of the methods 6-4-1 to 6-4-2 described in , a change in the SPS PDSCH transmission period may be possible. After receiving the DCI, the terminal receives the SPS PDSCH with the changed information and sends corresponding HARQ-ACK information (1006) to the base station. When the SPS PDSCH transmission period is changed to a higher signal or an L1 signal, when the SPS PDSCH exceeds the time slot boundary that can be generated according to the transmission period and time resource area for sending / receiving the SPS PDSCH, the terminal can send and receive the corresponding SPS PDSCH by at least one of the following methods.

[0428] -Method 10-1: SPS PDSCH is not received.

[0429] For example, if SPS PDSCH is allocated across time slot k and time slot k+1, as in Figure 6 As shown in 650, the terminal considers that the allocated SPS PDSCH is incorrectly configured, and does not receive it, nor does it send corresponding HARQ-ACK information.

[0430] Method 10-2: Repeated transmission / reception by dividing the SPS PDSCH based on the time slot boundary

[0431] For example, if SPS PDSCH is allocated across time slot k and time slot k+1, as in Figure 6 As shown in case 6 (650), the terminal determines that the SPS PDSCH is divided into the form of SPS PDSCH 652 and SPS PDSCH 654 and is repeatedly received. And the terminal only sends one HARQ-ACK information based on the last SPS PDSCH 654.

[0432] -Method 10-3: For the corresponding SPS PDSCH, corresponding partial transmission / reception is performed only in the slot before the slot boundary.

[0433] For example, if SPS PDSCH is allocated across slot k and slot k+1, as in Figure 6 In case 7 (650), the terminal determines that the valid SPS PDSCH is allocated only to SPS PDSCH 652 and receives the SPS PDSCH. That is, no transmission / reception is performed on SPS PDSCH 654. And when the terminal sends HARQ-ACK information, only one is sent based on SPS PDSCH 652.

[0434] -Method 10-4: For the corresponding SPS PDSCH, transmission / reception is performed only for slots exceeding the slot boundary.

[0435] For example, if SPS PDSCH is allocated across time slot k and time slot k+1, as Figure 6 In case 6 (650), the terminal determines that the valid SPS PDSCH is allocated only to SPS PDSCH 654 and receives the SPS PDSCH. That is, SPS PDSCH 652 is not transmitted or received. And when the terminal sends HARQ-ACK information, only one is sent based on SPS PDSCH 654.

[0436] Figure 11 is a diagram illustrating a method of transmitting HARQ-ACK information for SPS release of a terminal in a case where two or more DL SPSs are activated according to an embodiment of the present disclosure.

[0437] refer to Figure 11 When a terminal can operate two or more active DL SPSs in one cell / one BWP, the base station can configure two or more DL SPSs for one terminal. Reasons for supporting two or more DL SPS configurations: When a terminal supports various services, it may be beneficial to configure a DL SPS for each purpose because different MCSs or time / frequency resource allocations or cycles may be different for each service.

[0438] The terminal receives the following upper signal configuration information of the downlink SPS.

[0439] - Periodicity: DL SPS transmission cycle

[0440] -nrofHARQ-Processes: Number of HARQ processes set for DL ​​SPS

[0441] -nlPUCCH-AN: HARQ resource configuration information for DL ​​SPS

[0442] -mcs-Table: MCS table configuration information applied to DL SPS

[0443] -SPS Index: Index of the SPS configured in a unit / a BWP

[0444] The SPS index in the higher signal configuration information can be used for the purpose of indicating which SPS is indicated by the DCI (L1 signaling) that provides SPS activation or deactivation. Specifically, in the case where two SPSs are configured as a higher signal in one cell / one BWP, the terminal will need to be notified of the index information of the higher SPS information so that it knows which SPS is activated from the two SPSs indicated by the DCI indicating SPS activation. For example, the HARQ process number field in the DCI indicating SPS activation or deactivation indicates the index of a specific SPS, and through this, the terminal can enable or deactivate. Specifically, as shown in Table 9, when the DCI including a CRC scrambled with a CG-RNTI includes the following information and the new data indicator (NDI) field of the corresponding DCI indicates 0, the terminal determines that its indication is that the specific SPS PDSCH has been activated (deactivated).

[0445] [Table 9]

[0446] DCI format 0_0 DCI format 1_0 HARQ process number SPS Index SPS Index Redundant version Set to '00' Set to '00' Modulation and coding schemes Set to all '1' Set to all '1' Frequency domain resource allocation Set to all '1' Set to all '1'

[0447] In Table 9, it is possible to indicate one SPS index or multiple SPS indexes for one HARQ process number. In addition to the HARQ process number field, it is also possible to indicate one or more SPS indexes through other DCI fields (time resource field, frequency resource field, MCS, RV, PDSCH-to-HARQ timing field, etc.). Basically, 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 for indicating the release of the SPS PDSCH 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 received in the time slot is k1, the position of the HARQ-ACK codebook of the DCI for indicating the release of the SPS PDSCH is also k1. Therefore, when a DCI indicating SPS PDSCH release in slot k is sent, the terminal will not expect to be scheduled for the PDSCH corresponding to HARQ-ACK codebook position k1 in the same slot k, and if this happens, the terminal regards it as an error case.

[0448] In Table 9, DCI formats 0_0 and 1_0 are exemplified, but DCI formats 0_1 and 1_1 are applicable, and DCI formats 0_x and 1_x may be sufficiently extended to be applicable.

[0449] Through the above operations, the terminal can simultaneously operate (1100) one or more SPS PDSCHs in one cell / one BWP by receiving the SPS PDSCH higher signal and the DCI signal indicating the activation of the SPS PDSCH. Thereafter, the terminal periodically receives the activated SPS PDSCH in one cell / one BWP and sends (1102) the HARQ-ACK information corresponding thereto to the base station. The HARQ-ACK information corresponding to the SPS PDSCH is determined by the terminal through the PDSCH-to-HARQ-ACK timing included in the activated DCI information via the precise time and frequency information in the corresponding time slot, and through the n1PUCCH-AN information and SPS higher configuration information included in the time slot interval information via the PUCCH format information. If the PDSCH-to-HARQ-ACK timing field is not included in the DCI information, the terminal assumes that a value pre-configured by the higher signal is the default value and determines to apply the corresponding value.

[0450] When the terminal receives (1104) a DCI indicating deactivation (or release) of one SPS PDSCH when a type 1 HARQ-ACK codebook is configured, the terminal transmits HARQ-ACK information by including the position of the HARQ-ACK codebook for the HARQ-ACK information of the DCI in the corresponding HARQ-ACK codebook position received by the SPS PDSCH. If the deactivation of two or more SPS PDSCHs is indicated by one DCI, it may be a problem that the terminal should transmit the HARQ-ACK information of the DCI at a certain HARQ-ACK codebook position. To solve this problem, the terminal transmits (1106) HARQ-ACK using at least one of the following methods.

[0451] *Method a-1: Lowest index (or highest index)

[0452] In this method, when two or more SPS PDSCHs are deactivated by a DCI indicating deactivation, the HARQ-ACK codebook position corresponding to the SPS PDSCH received with the minimum value (or highest value or middle value) in the index of the corresponding SPS PDSCH includes HARQ-ACK information corresponding to the DCI indicating deactivation. For example, if SPS PDSCH index 1, SPS PDSCH index 4, and SPS PDSCH index 5 are simultaneously deactivated by one DCI, the terminal includes and sends the HARQ-ACK information of the DCI to the HARQ-ACK codebook position corresponding to SPS PDSCH index 1 (or 5).

[0453] *Method a-2: Earliest HARQ-ACK codebook opportunity (latest HARQ-ACK codebook opportunity)

[0454] In this method, when two or more SPS PDSCHs are deactivated by a DCI indicating deactivation, the HARQ-ACK information corresponding to the DCI indicating deactivation is included in the earliest (or latest) HARQ-ACK codebook among the positions of the HARQ-ACK codebooks 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. If the HARQ-ACK codebook position for the PDSCH reception corresponding to SPS PDSCH index 1 is k1, if the HARQ-ACK codebook position for the PDSCH reception corresponding to SPS PDSCH index 2 is k2, and if the HARQ codebook position for the PDSCH reception corresponding to SPS PDSCH index 3 is k3, and k1 < k2 < k3, then the terminal transmits through the HARQ-ACK information corresponding to the DCI at k1 (or k3). If the positions of the HARQ-ACK codebooks for the PDSCH receptions of two or more SPS PDSCHs are the same, the terminal treats them as one and performs the above operation.

[0455] * Method a-3: All HARQ-ACK codebook occasions

[0456] In this method, when two or more SPS PDSCHs are deactivated by a DCI that indicates deactivation, instead of selecting a HARQ-ACK codebook position according to the above method a-1 or a-2, the HARQ-ACK information of the DCI is transmitted in all HARQ-ACK codebook positions. For example, when SPS PDSCH index 1, SPS PDSCH index 4, and SPS PDSCH index 5 are deactivated simultaneously by a DCI, the terminal includes the HARQ-ACK information of the DCI in the HARQ-ACK codebook positions corresponding to SPS PDSCH indices 1, 4, and 5, and transmits this information. If at least two HARQ-ACK codebook positions of the SPS PDSCH are the same, the terminal treats them as one and transmits the HARQ-ACK information. As 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, if the HARQ-ACK codebook position received by the PDSCH corresponding to SPS PDSCH index 1 is k1, if the HARQ-ACK codebook position received by the PDSCH corresponding to SPS PDSCH index 2 is k2, and if the HARQ-ACK codebook position received by the PDSCH corresponding to SPS PDSCH index 3 is k3, and k1 < k2 < k3, the terminal includes the HARQ-ACK information corresponding to the DCI in k1, k2, and k3, and transmits this information. If the positions of the HARQ-ACK codebooks received by the PDSCHs for two or more SPS PDSCHs are the same, the terminal treats them as one and performs the above operation.

[0457] *Method a-4: gNB Configuration

[0458] [[ID=⑥]]First, this method means that the base station determines the above methods a-1 to a-3 as a higher signal. Second, in addition to methods a-1 to a-3, the base station may also directly determine the position of the HARQ-ACK codebook as a higher signal or an L1 signal. At this time, when two or more SPS PDSCHs are deactivated by a DCI, the position of the HARQ-ACK codebook that can be determined by the base station can be determined as the higher or L1 signal among the possible candidate HARQ-ACK codebook position candidates corresponding to the respective SPS PDSCHs, or regardless of this, it can be determined as the higher or L1 signal.

[0459] It should be noted that there seems to be a numbering error in your original text where "SPSPDSCH" in the first paragraph should probably be "SPS PDSCH". This has been corrected in the translation for better understanding. Also, the numbering "⑥" in the English translation of paragraph ID=6 should be changed back to the original "6" if you want to maintain the original format consistency.When the terminal receives a DCI indicating the release or deactivation of one or more SPS PDSCHs, the terminal does not expect to receive the same HARQ-ACK codebook position for transmitting the HARQ-ACK information of the DCI and the HARQ-ACK codebook position for transmitting the HARQ-ACK information of the PDSCH scheduled by another DCI. When such a schedule is received, the terminal regards it as an error and performs any operation.

[0460] Figure 12 is a block diagram for an unlicensed operation in a case where a terminal is connected to two or more transmission and reception points (TRPs) according to an embodiment of the present disclosure.

[0461] refer to Figure 12 , the terminal may perform (1200) transmission of multiple TRPs and data. Here, the term TRP may be used interchangeably with the term base station or base station (BS). In this case, the terminal receives (1202) a signal instructing unauthorized activation from one or more TRPs. In this case, the signal may be a higher signal or an L1 signal. Thereafter, after receiving the signal indicating activation information, the terminal sends or receives (1204) data from one or more TRPs and unauthorized resources. In addition, the terminal may receive one or more unauthorized resource configurations in one cell and one BWP. Thereafter, the terminal receives (1206) a signal instructing unauthorized deactivation / release from one or more TRPs. In this case, the signal may be a higher signal or an L1 signal. The terminal sends (1208) a response signal to the signal. For example, when the unauthorized is SPS, the signal is DCI, and in this case, the terminal sends HARQ-ACK information of the DCI. As another example, when the unauthorized is configured as authorization type 2, the signal is DCI, and in this case, the terminal sends response information to the DCI to the MAC CE and sends confirmation information to the TRP.

[0462] As an unauthorized operation, there are mainly configured authorization type 1 and configured authorization type 2 in the uplink, and SPS in the downlink. In the configured authorization type 1, the configured authorization resource configuration, activation and deactivation are performed by a higher signal, while in the configured authorization type 2, some resource configuration information is sent through a higher signal, and the remaining configuration information, activation and deactivation of the configured authorization resources are performed through DCI (L1 signal). In the description, it is described as unauthorized for convenience. In the case where two or more unauthorized configurations are possible within a cell or a BWP, when the terminal can send and receive data with two or more TRPs, one unauthorized resource may be able to send and receive data in association with one TRP. As an example, when unauthorized resource A is configured, the terminal determines that the corresponding unauthorized resource is associated with TRP 1, and receives or sends data from TRP 1 and the periodic unauthorized resource.

[0463] Specifically, in the case of configured grant type 1, since the configured grant resource configuration, activation, and deactivation are indicated only by higher signals, not L1 signals, the higher signal information may include information indicating which TRP the configured grant is sent from. For example, the following parameters may appear in the higher information about the configured grant type.

[0464] *TRP index (or spatial domain information): Link to the configured authorized TRP information

[0465] One or more TRPs associated with a configured authorization can be associated. Specifically, when multiple TRPs linked to a configured authorization are linked, it can be detailed in the following cases.

[0466] *Case b-1: Each configured authorization resource is associated with a different TRP. For example, when a configured authorization resource is periodically configured and the terminal is connected to two TRPs, odd-numbered configured authorizations starting from the time the configured authorization is activated can be associated with TRP 1, and even-numbered configured authorizations can be associated with TRP 2. If generalized, the TRP associated with a particular configured authorization can be determined by a formula such as "configured authorization index" mod "TRP number" = "TRP index."

[0467] *Case b-2: All configured granted resources are associated with two or more TRPs. For each configured granted opportunity, the terminal may be able to send data to multiple TRPs.

[0468] *Case b-3: The transmission period is determined for each TRP regardless of the configured grant index, so that a specific configured grant can be associated with one TRP, while another configured grant can be associated with multiple TRPs. For example, in the case where a terminal is connected to two TRPs, when TRP 1 is associated with all configured grant resources and TRP 2 is associated with even-numbered configured grant resources, when data is generated only for TRP 1 in the odd-numbered configured grant resources, the terminal transmits, and when data is generated for both TRP 1 and TRP 2 in the even-numbered configured grant resources, the terminal transmits data from the corresponding resources.

[0469] The above situation applies to all unlicensed operations including SPS. The information that one unlicensed resource is associated with multiple TRPs can be configured as a higher or L1 signal. In the case of SPS, after receiving the configuration information and activation information of the configured grant type 1, when generating data according to the configured authorized resources configured for the TRP indicated in the TRP index, the terminal sends data without a separate grant.

[0470] In the case of a configured Grant Type 2, some information is transmitted by the higher signal, while the remaining configuration information, activation, and deactivation are indicated by the L1 signal. If the higher signal contains TRP index information, the terminal receives an L1 signal instructing activation of the configured Grant Type 2 based on this information. Then, when data is to be sent to the configured granted resources for the TRP indicated in the TRP index provided by the corresponding higher configuration information, the corresponding data is sent without a separate grant. On the other hand, if there is no information about the TRP index in the higher configuration information, the terminal implicitly determines that the TRP sends data for the resources configured as the configured grant based on the TRP associated with the CORESET, and DCI indicating activation of the configured Grant Type 2 in the CORESET is transmitted. As an example, if DCI indicating activation of the configured Grant Type 2 is transmitted from TRP 1, when the terminal generates data for the activated configured granted resources, it transmits the data to TRP 1 without a separate grant. At least one of the following two methods can be used to transmit the TRP with DCI indicating that the configured Grant Type 2 is deactivated.

[0471] *Method b-1: The configured grant resources associated with TRP 1 may only indicate the release of the configured grant according to the DCI sent from the CORESET of TRP 1. If one DCI supports the simultaneous release of two or more configured grant resources, according to this method, the two or more configured grants should all be associated with TRP 1.

[0472] * Method b-2: Unlike method b-1, a DCI sent from a CORESET associated with a TRP different from TRP 1 may also indicate the release of a configured grant. If one DCI supports the simultaneous release of two or more configured grant resources, according to this method, two or more configured grants may be associated with different TRPs.

[0473] In the case of SPS, the detailed operation of the grant type 2 configured above is mostly similar, and in other parts, the terminal receives data for the activated SPS resource and reports HARQ-ACK information on it. When the corresponding SPS resource is associated with TRP 1, the terminal sends HARQ-ACK information of the data received by the corresponding SPS resource to TRP 1. If the SPS resource is associated with two or more TRPs, the TRP to which the terminal will send the HARQ-ACK information can be determined according to the above situation. If a specific SPS resource is received from TRP 1 in one SPS configuration, the terminal sends HARQ-ACK information for the PDSCH received from the SPS to TRP 1. If a specific SPS resource is received from TRP 1 and TRP 2 in one SPS configuration, the terminal sends the HARQ-ACK information for the PDSCH received from the SPS to TRP 1 or TRP 2 through a higher signal configuration or L1 signal indication. Alternatively, when specific SPS resources are received from TRP 1 and TRP 2 in one SPS configuration, the terminal transmits HARQ-ACK information for the PDSCH received from the SPS to TRP 1 having the lowest index (or TRP 1 if TRP 1 is the primary TRP).

[0474] As another example, if a DCI indicating activation from a configured Grant Type 2 or SPS is transmitted as a CORESET associated with TRP 1, the TRP associated with the configured Grant Type 2 or SPS may be sufficiently different from TRP 1. Specifically, this operation is possible when the terminal previously determines TRP connection information for the configured Grant Type 2 or SPS by a higher signal. Alternatively, it may be possible to add a field directly indicating TRP information to the DCI information indicating activation, or to indirectly indicate TRP information using the HARQ process number or RV value of the DCI.

[0475] As another example, when different unlicensed resources associated with one TRP overlap, the terminal should select one of them and send or receive data as the unlicensed resource. In this case, in the selection method, when the terminal is implemented or in the case of unlicensed resources, the priority value may be sent through a higher signal configuration or L1 signal indication, and the terminal may be able to send or receive unlicensed resources with higher priority based on the priority value. If different unlicensed resources associated with different TRPs overlap, the terminal may be able to send or receive data for the unlicensed resource without applying the selection method.

[0476] Figure 13 is a block diagram illustrating a structure of a terminal capable of executing the embodiment according to an embodiment of the present disclosure.

[0477] refer to Figure 13 The terminal of the present disclosure may include a terminal receiver 1300, a terminal transmitter 1304, and a terminal processor 1302. In an embodiment, the terminal receiver 1300 and the terminal transmitter 1304 may be collectively referred to as a transceiver. The transceiver can transmit and receive signals to and from a base station. These signals 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, and an RF receiver that amplifies the received signal with low noise and down-converts the frequency. In addition, the transceiver may receive signals via a wireless channel, output the signals to the terminal processor 1302, and transmit the signals output from the terminal processor 1302 via the wireless channel. The terminal processor 1302 may control a series of processes so that the terminal operates according to the above-described embodiment.

[0478] Figure 14 is a block diagram illustrating a structure of a base station capable of performing the embodiments according to an embodiment of the present disclosure.

[0479] refer to Figure 14 In this embodiment, the base station may include at least one of a base station receiver 1401, a base station transmitter 1405, and a base station processor 1403. In the embodiment, the base station receiver 1401 and the base station transmitter 1405 may be collectively referred to as a transceiver. The transceiver can transmit and receive signals to and from the terminal. The signals 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, and an RF receiver that amplifies the received signal with low noise and down-converts the frequency. In addition, the transceiver may receive signals via a wireless channel, output the signals to the base station processor 1403, and transmit the signals output from the base station processor 1403 via the wireless channel. The base station processor 1403 may control a series of processes so that the terminal operates according to the above-described embodiment.

[0480] In the drawings describing the methods of the present disclosure, the order of description does not always correspond to the order of performing the operations of each method, and the sequential relationship between the operations may be changed or the operations may be performed in parallel.

[0481] In the present disclosure, terminal operations for SPS PDSCH have been primarily described, but are equally applicable to PUSCH without grant (or configured grant type 1 and type 2).

[0482] Furthermore, in the method of the present disclosure, some or all of the contents of each embodiment may be combined without departing from the essential spirit and scope of the present disclosure.

[0483] The embodiments of the present disclosure described and illustrated in the specification and the drawings have been presented in order to easily explain the technical content of the present disclosure and to help understand the present disclosure, and are not intended to limit the scope of the present disclosure. That is, it is obvious to those skilled in the art that other modifications and changes can be made to it based on the technical spirit of the present disclosure. In addition, the above-mentioned various embodiments can be used in combination as needed. For example, the embodiments of the present disclosure can be partially combined to operate base stations and terminals. In addition, although the above-mentioned embodiments have been described using NR systems, other variations based on the technical ideas of the embodiments can be implemented in other systems such as FDD and TDD LTE systems.

[0484] While the present disclosure has been described with reference to various embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents.

Claims

1. A method performed by a terminal in a communication system, the method comprising: Receiving from a base station a single downlink control information DCI format indicating release of multiple semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs); Obtaining a HARQ-ACK codebook including hybrid automatic repeat request acknowledgement HARQ-ACK information corresponding to the multiple SPS PDSCH releases indicated by the single DCI format; as well as Sending the HARQ-ACK codebook to the base station, The position of the HARQ-ACK information in the HARQ-ACK codebook is the same as that of the corresponding SPS PDSCH reception with the lowest SPS configuration index among the multiple SPS PDSCH releases.

2. The method according to claim 1, further comprising receiving a radio resource control (RRC) message from the base station, the RRC message including information configuring the HARQ-ACK codebook as semi-static.

3. The method according to claim 1, wherein The multiple SPS PDSCH releases are indicated based on a value of a HARQ process number field in the single DCI format, and Wherein, when (i) a cyclic redundancy check CRC of the single DCI format is scrambled with a configured scheduling radio network temporary identifier CS-RNTI, (ii) a new data indicator field in the single DCI format is set to 0, and (iii) a redundancy version field, a modulation and coding scheme field, and a frequency domain resource allocation field respectively correspond to predetermined values, the single DCI format is determined to be validly released.

4. The method according to claim 1, wherein The HARQ-ACK codebook is sent to the base station on a physical uplink control channel (PUCCH).

5. A method performed by a base station in a communication system, the method comprising: Sending a single downlink control information DCI format indicating the release of multiple semi-persistent scheduling SPS physical downlink shared channels PDSCH to the terminal; as well as receiving, from the terminal, a HARQ-ACK codebook including hybrid automatic repeat request acknowledgement (HARQ-ACK) information corresponding to the plurality of SPS PDSCH releases indicated by the single DCI format, The position of the HARQ-ACK information in the HARQ-ACK codebook is the same as that of the corresponding SPS PDSCH reception with the lowest SPS configuration index among the multiple SPS PDSCH releases.

6. The method according to claim 5, further comprising sending a radio resource control (RRC) message to the terminal, the RRC message including information configuring the HARQ-ACK codebook as semi-static.

7. The method according to claim 5, wherein: The multiple SPS PDSCH releases are indicated based on the value of the HARQ process number field in the single DCI format, wherein, in a case where (i) a cyclic redundancy check (CRC) of the single DCI format is scrambled with a configured scheduling radio network temporary identifier (CS-RNTI), (ii) a new data indicator field in the single DCI format is set to 0, and (iii) a redundancy version field, a modulation and coding scheme field, and a frequency domain resource allocation field respectively correspond to predetermined values, the single DCI format corresponds to a valid release, and The HARQ-ACK codebook is received from the terminal on a physical uplink control channel PUCCH.

8. A terminal in a communication system, the terminal comprising: transceiver; as well as a processor coupled to the transceiver and configured to: Receiving from a base station a single downlink control information DCI format indicating release of multiple semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs); Obtaining a HARQ-ACK codebook including hybrid automatic repeat request acknowledgement HARQ-ACK information corresponding to the multiple SPS PDSCH releases indicated by the single DCI format; as well as Sending the HARQ-ACK codebook to the base station, The position of the HARQ-ACK information in the HARQ-ACK codebook is the same as that of the corresponding SPS PDSCH reception with the lowest SPS configuration index among the multiple SPS PDSCH releases.

9. The terminal according to claim 8, wherein: The processor is further configured to receive a radio resource control (RRC) message from the base station, the RRC message including information configuring a HARQ-ACK codebook as semi-static.

10. The terminal according to claim 8, wherein: The multiple SPS PDSCH releases are indicated based on a value of a HARQ process number field in the single DCI format, and Wherein, when (i) a cyclic redundancy check CRC of the single DCI format is scrambled with a configured scheduling radio network temporary identifier CS-RNTI, (ii) a new data indicator field in the single DCI format is set to 0, and (iii) a redundancy version field, a modulation and coding scheme field, and a frequency domain resource allocation field respectively correspond to predetermined values, the single DCI format is determined to be validly released. The terminal according to claim 8 , wherein: The HARQ-ACK codebook is sent to the base station on a physical uplink control channel (PUCCH).

12. A base station in a communication system, the base station comprising: transceiver; as well as a processor coupled to the transceiver and configured to: Sending a single downlink control information DCI format indicating release of multiple semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs) to the terminal; and receiving, from the terminal, a HARQ-ACK codebook including hybrid automatic repeat request acknowledgement (HARQ-ACK) information corresponding to the plurality of SPS PDSCH releases indicated by the single DCI format, The position of the HARQ-ACK information in the HARQ-ACK codebook is the same as that of the corresponding SPS PDSCH reception with the lowest SPS configuration index among the multiple SPS PDSCH releases.

13. The base station according to claim 12, wherein: The processor is further configured to send a radio resource control (RRC) message to the terminal, where the RRC message includes information for configuring the HARQ-ACK codebook as semi-static.

14. The base station according to claim 12, wherein: The multiple SPS PDSCH releases are indicated based on the value of the HARQ process number field in the single DCI format, Wherein, when (i) a cyclic redundancy check CRC of the single DCI format is scrambled with a configured scheduling radio network temporary identifier CS-RNTI, (ii) a new data indicator field in the single DCI format is set to 0, and (iii) a redundancy version field, a modulation and coding scheme field, and a frequency domain resource allocation field respectively correspond to predetermined values, the single DCI format corresponds to a valid release.

15. The base station according to claim 12, wherein: The HARQ-ACK codebook is received from the terminal on a physical uplink control channel (PUCCH).

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