KR102472160B1 - Method and apparatus for data transmission in wirelss cellular communication system - Google Patents

Abstract

The present disclosure relates to a communication technique and a system for converging a 5G communication system with IoT technology to support a higher data rate after a 4G system. This disclosure provides intelligent services based on 5G communication technology and IoT-related technologies (e.g., smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, security and safety related services, etc.) ) can be applied. The present invention discloses a method and apparatus for performing retransmission of only code blocks requiring retransmission among transport blocks, not all transport blocks, when retransmission of an initially transmitted transport block is required.

Description

Data transmission method and apparatus in wireless cellular communication system

The present invention relates to a wireless communication system, and more specifically, to a method and apparatus for performing retransmission of only code blocks requiring retransmission among transport blocks, rather than all transport blocks, when retransmission of an initially transmitted transport block is required. it's about

Efforts are being made to develop an improved 5G communication system or pre-5G communication system to meet the growing demand for wireless data traffic after the commercialization of the 4G communication system. For this reason, the 5G communication system or pre-5G communication system is being called a system after a 4G network (Beyond 4G Network) communication system or an LTE system (Post LTE). In order to achieve a high data rate, the 5G communication system is being considered for implementation in a mmWave band (eg, a 60 gigabyte (60 GHz) band). In order to mitigate the path loss of radio waves and increase the propagation distance of radio waves in the ultra-high frequency band, beamforming, massive MIMO, and Full Dimensional MIMO (FD-MIMO) are used in 5G communication systems. ), array antenna, analog beam-forming, and large scale antenna technologies are being discussed. In addition, to improve the network of the system, in the 5G communication system, an evolved small cell, an advanced small cell, a cloud radio access network (cloud RAN), and an ultra-dense network , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation etc. are being developed. In addition, in the 5G system, advanced coding modulation (Advanced Coding Modulation: ACM) methods FQAM (Hybrid FSK and QAM Modulation) and SWSC (Sliding Window Superposition Coding), advanced access technologies FBMC (Filter Bank Multi Carrier), NOMA (non orthogonal multiple access), SCMA (sparse code multiple access), etc. are being developed.

On the other hand, the Internet is evolving from a human-centered connection network in which humans create and consume information to an Internet of Things (IoT) network in which information is exchanged and processed between distributed components such as things. IoE (Internet of Everything) technology, which combines IoT technology with big data processing technology through connection with a cloud server, etc., is also emerging. In order to implement IoT, technical elements such as sensing technology, wired/wireless communication and network infrastructure, service interface technology, and security technology are required, and recently, sensor networks for connection between objects and machine to machine , M2M), and MTC (Machine Type Communication) technologies are being studied. In the IoT environment, intelligent IT (Internet Technology) services that create new values in human life by collecting and analyzing data generated from connected objects can be provided. IoT is a field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliances, advanced medical service, etc. can be applied to

Accordingly, various attempts are being made to apply the 5G communication system to the IoT network. For example, technologies such as sensor network, machine to machine (M2M), and machine type communication (MTC) are implemented by techniques such as beamforming, MIMO, and array antenna, and 5G communication technologies There is. The application of the cloud radio access network (cloud RAN) as the big data processing technology described above can be said to be an example of convergence of 5G technology and IoT technology.

When data is transmitted in a wireless communication system, particularly in a conventional LTE system, transmission is performed in units of transport blocks (TBs; transport blocks). The TB is divided into several code blocks (CBs; code blocks), and channel coding is performed in units of the CBs. When retransmission is performed after the initial transmission, it is performed in units of TB, and even if decoding of only one CB fails, retransmission must be performed for the entire TB. Accordingly, there may be a case where retransmission is required in units of CBs, and for this case, a method of inserting and operating a CB index indicating the order of CBs in CBs is required.

An object of the present invention is to provide a method for performing retransmission in units of CBs or units of CB groups.

In the present invention, a transport block (TB) may include a Medium Access Control (MAC) header, a MAC control element (CE), one or more MAC Service Data Units (SDUs), and padding bits. can Alternatively, TB may indicate a unit of data transmitted from the MAC layer to a physical layer or a MAC Protocol Data Unit (PDU).

In retransmission in CB group units, when data such as URLLC overwrites previously mapped data or is transmitted by puncturing existing data, in order to reduce the probability of decoding failure of the previously mapped code block group, code A code block group interleaver that can change the mapping order within a block group is described.

The present invention for solving the above problems is a control signal processing method in a wireless communication system, comprising: receiving a first control signal transmitted from a base station; processing the received first control signal; and transmitting a second control signal generated based on the processing to the base station.

As described above, the present invention provides an operating method for performing retransmission in units of CBs or CB groups when retransmission is necessary in transmission of one or two TBs, thereby reducing unnecessary data transmission by efficiently transmitting base stations and terminals. let it be That is, a method for saving resources required for retransmission is provided by using partial retransmission to transmit only a part of the initial transmission when retransmission is performed.

1 is a diagram showing a downlink time-frequency domain transmission structure of an LTE or LTE-A system.
2 is a diagram showing an uplink time-frequency domain transmission structure of an LTE or LTE-A system.
3 is a diagram showing how data for eMBB, URLLC, and mMTC are allocated in frequency-time resources in a communication system.
4 is a diagram showing how data for eMBB, URLLC, and mMTC are allocated in frequency-time resources in a communication system.
5 is a diagram showing a structure in which one transport block is divided into several code blocks and a CRC is added according to an embodiment.
6 is a diagram illustrating a structure in which an outer code is applied and coded according to an embodiment.
7 is a block diagram showing whether an outer code is applied or not according to an embodiment.
8 is a diagram illustrating an example of partial retransmission according to an embodiment.
9 is a diagram for explaining the CBG interleaver operation in the first embodiment.
10 is a diagram illustrating an operation of a base station for downlink data transmission according to the first embodiment.
11 is a diagram illustrating an operation of a terminal for downlink data transmission according to the first embodiment.
12 is a diagram illustrating mapping of 6 code blocks (CBs) to allocated frequency-time resources.
13 shows an example of a mapping method in which CBs and OFDM symbols are aligned when 7 OFDM symbols are allocated for data transmission in the frequency domain 13-02 allocated to the UE and a total of 6 CBs are scheduled to be transmitted. It is an illustrated drawing.
14 is a diagram showing an example of a mapping method in which CBs and OFDM symbols are aligned when 1, 2, 3, 4, 5, 7, and 14 CBs are mapped to 7 OFDM symbols; to be
15 is a flowchart illustrating an operation of a base station related to a terminal in which the terminal generates HARQ-ACK information according to CBG configuration.
16A and 16B are flowcharts for explaining pseudo-code.
17 is a diagram illustrating an internal structure of a terminal according to embodiments of the present invention.
18 is a diagram showing the internal structure of a base station according to embodiments of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with accompanying drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or operator. Therefore, the definition should be made based on the contents throughout this specification.

Advantages and features of the present invention, and methods for achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the present embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Efforts are being made to develop an improved 5G communication system or pre-5G communication system to meet the growing demand for wireless data traffic after the commercialization of the 4G communication system. For this reason, the 5G communication system or pre-5G communication system is being called a system after a 4G network (Beyond 4G Network) communication system or an LTE system (Post LTE). In order to achieve a high data rate, the 5G communication system is being considered for implementation in a mmWave band (eg, a 60 gigabyte (60 GHz) band). In order to mitigate the path loss of radio waves and increase the propagation distance of radio waves in the ultra-high frequency band, beamforming, massive MIMO, and Full Dimensional MIMO (FD-MIMO) are used in 5G communication systems. ), array antenna, analog beam-forming, and large scale antenna technologies are being discussed. In addition, to improve the network of the system, in the 5G communication system, an evolved small cell, an advanced small cell, a cloud radio access network (cloud RAN), and an ultra-dense network , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation etc. are being developed. In addition, in the 5G system, advanced coding modulation (Advanced Coding Modulation: ACM) methods FQAM (Hybrid FSK and QAM Modulation) and SWSC (Sliding Window Superposition Coding), advanced access technologies FBMC (Filter Bank Multi Carrier), NOMA (non-orthogonal multiple access), SCMA (sparse code multiple access), and the like are being developed.

On the other hand, the Internet is evolving from a human-centered connection network in which humans create and consume information to an Internet of Things (IoT) network in which information is exchanged and processed between distributed components such as things. IoE (Internet of Everything) technology, which combines IoT technology with big data processing technology through connection with a cloud server, etc., is also emerging. In order to implement IoT, technical elements such as sensing technology, wired/wireless communication and network infrastructure, service interface technology, and security technology are required, and recently, sensor networks for connection between objects and machine to machine , M2M), and MTC (Machine Type Communication) technologies are being studied. In the IoT environment, intelligent IT (Internet Technology) services that create new values in human life by collecting and analyzing data generated from connected objects can be provided. IoT is a field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliances, advanced medical service, etc. can be applied to

Accordingly, various attempts are being made to apply the 5G communication system to the IoT network. For example, technologies such as sensor network, machine to machine (M2M), and machine type communication (MTC) are implemented by techniques such as beamforming, MIMO, and array antenna, which are 5G communication technologies. will be. The application of the cloud radio access network (cloud RAN) as the big data processing technology described above can be said to be an example of convergence of 5G technology and IoT technology.

On the other hand, in the new 5G communication, NR (New Radio access technology), it is designed to allow various services to be freely multiplexed in time and frequency resources, and accordingly, waveform/numerology and reference signals are dynamically or can be freely assigned. Optimized data transmission through measurement of channel quality and interference is important in order to provide optimal service to terminals in wireless communication, and accordingly, accurate measurement of channel conditions is essential. However, unlike 4G communication in which channel and interference characteristics do not change significantly depending on frequency resources, in the case of 5G channels, channel and interference characteristics vary greatly depending on the service. requires support of a subset of Meanwhile, in the NR system, types of supported services may be divided into categories such as enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable and low-latency communications (URLC). eMBB is a high-speed transmission of high-capacity data, mMTC is a service aimed at minimizing terminal power and accessing multiple terminals, and URLLC is a service that aims for high reliability and low latency. Different requirements may be applied according to the type of service applied to the terminal.

In this way, a plurality of services can be provided to users in a communication system, and in order to provide such a plurality of services to users, a method capable of providing each service within the same time period according to characteristics and a device using the same are required. .

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

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

For the same reason, in the accompanying drawings, some components are exaggerated, omitted, or schematically illustrated. Also, the size of each component does not entirely reflect the actual size. In each figure, the same reference number is assigned to the same or corresponding component.

Advantages and features of the present invention, and methods for achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the present embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

At this time, it will be understood that each block of the process flow chart diagrams and combinations of the flow chart diagrams can be performed by computer program instructions. These computer program instructions may be embodied in a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, so that the instructions executed by the processor of the computer or other programmable data processing equipment are described in the flowchart block(s). It creates means to perform functions. These computer program instructions may also be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing equipment to implement functionality in a particular way, such that the computer usable or computer readable memory The instructions stored in are also capable of producing an article of manufacture containing instruction means that perform the functions described in the flowchart block(s). The computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operational steps are performed on the computer or other programmable data processing equipment to create a computer-executed process to generate computer or other programmable data processing equipment. Instructions for performing processing equipment may also provide steps for performing the functions described in the flowchart block(s).

Additionally, each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical function(s). It should also be noted that in some alternative implementations it is possible for the functions mentioned in the blocks to occur out of order. For example, two blocks shown in succession may in fact be executed substantially concurrently, or the blocks may sometimes be executed in reverse order depending on their function.

At this time, the term '~unit' used in this embodiment means software or a hardware component such as FPGA or ASIC, and '~unit' performs certain roles. However, '~ part' is not limited to software or hardware. '~bu' may be configured to be in an addressable storage medium and may be configured to reproduce one or more processors. Therefore, as an example, '~unit' refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, and procedures. , subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. Functions provided within components and '~units' may be combined into smaller numbers of components and '~units' or further separated into additional components and '~units'. In addition, components and '~units' may be implemented to play one or more CPUs in a device or a secure multimedia card. Also, in an embodiment, '~ unit' may include one or more processors.

The wireless communication system has moved away from providing voice-oriented services in the early days and, for example, 3GPP's HSPA (High Speed Packet Access), LTE (Long Term Evolution or E-UTRA (Evolved Universal Terrestrial Radio Access)), LTE-Advanced (LTE-A), 3GPP2's HRPD (High Rate Packet Data), UMB (Ultra Mobile Broadband), and IEEE's 802.16e communication standards, such as the broadband wireless communication system that provides high-speed, high-quality packet data services. are doing In addition, as a 5G wireless communication system, a communication standard of 5G or NR (new radio) is being created.

As a representative example of the broadband wireless communication system, in the LTE system, an Orthogonal Frequency Division Multiplexing (OFDM) method is employed in downlink (DL), and SC-FDMA (Single Carrier Frequency Division Multiplexing) in uplink (UL) Access) method is used. Uplink refers to a radio link in which a terminal (UE (User Equipment) or MS (Mobile Station)) transmits data or control signals to a base station (eNode B or base station (BS)), and downlink refers to a radio link in which a base station transmits a terminal to a terminal. A radio link that transmits data or control signals. The above multiple access scheme distinguishes data or control information of each user by allocating and operating time-frequency resources to carry data or control information for each user so that they do not overlap each other, that is, so that orthogonality is established. do.

The LTE system employs a HARQ (Hybrid Automatic Repeat request) method for retransmitting corresponding data in a physical layer when decoding failure occurs in initial transmission. In the HARQ scheme, when a receiver fails to accurately decode (decode) data, the receiver transmits Negative Acknowledgment (NACK) to the transmitter to inform the transmitter of the decoding failure so that the transmitter can retransmit the corresponding data in the physical layer. The receiver improves data reception performance by combining data retransmitted by the transmitter with previously failed data to be decoded. In addition, when the receiver correctly decodes the data, it may transmit information (ACK; Acknowledgment) notifying the transmitter of decoding success so that the transmitter can transmit new data.

1 is a diagram showing the basic structure of a time-frequency domain, which is a radio resource domain in which the data or control channel is transmitted in downlink in an LTE system.

In FIG. 1, the horizontal axis represents the time domain and the vertical axis represents the frequency domain. The minimum transmission unit in the time domain is an OFDM symbol. N _symb (1-02) OFDM symbols are gathered to form one slot (1-06), and two slots are gathered to form one subframe (1-05). make up The length of the slot is 0.5 ms, and the length of the subframe is 1.0 ms. Also, the radio frame 1-14 is a time domain unit composed of 10 subframes. The minimum transmission unit in the frequency domain is a subcarrier, and the bandwidth of the entire system transmission bandwidth consists of a total of N _BW (1-04) subcarriers.

A basic unit of resources in the time-frequency domain is a resource element (RE), which can be represented by an OFDM symbol index and a subcarrier index. A resource block (1-08, Resource Block; RB or Physical Resource Block; PRB) consists of N _symb (1-02) contiguous OFDM symbols in the time domain and N _RB (1-10) contiguous subcarriers in the frequency domain. is defined as Accordingly, one RB (1-08) is composed of N _symb x N _RB REs (1-12). In general, the minimum transmission unit of data is the RB unit. In an LTE system, N _symb = 7 and N _RB = 12, and N _BW and N _RB are proportional to the bandwidth of the system transmission band, but other systems other than the LTE system may use other values. The data rate increases in proportion to the number of RBs scheduled for the UE. The LTE system defines and operates six transmission bandwidths. In the case of an FDD system in which downlink and uplink are divided into frequencies and operated, a downlink transmission bandwidth and an uplink transmission bandwidth may be different from each other. The channel bandwidth represents the RF bandwidth corresponding to the system transmission bandwidth. Table 1-01 shows the correspondence between system transmission bandwidth and channel bandwidth defined in the LTE system. For example, in an LTE system having a 10 MHz channel bandwidth, the transmission bandwidth is composed of 50 RBs.

Channel bandwidth
BW _Channel [MHz] 1.4 3 5 10 15 20 Transmission bandwidth configuration N _RB 6 15 25 50 75 100

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

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

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

- Resource block assignment: Indicates an RB allocated for data transmission. The resource to be expressed is determined according to the system bandwidth and resource allocation method.

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

- HARQ process number: indicates the HARQ process number.

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

- Redundancy version: indicates the redundancy version of HARQ.

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

The DCI goes through a channel coding and modulation process, which is a physical downlink control channel (PDCCH) (or control information, hereinafter used interchangeably) or an enhanced PDCCH (EPDCCH) (or enhanced control information, hereinafter), which is a downlink physical control channel. It can be transmitted on).

In general, the DCI is scrambled with a specific RNTI (Radio Network Temporary Identifier) (or terminal identifier) independently for each terminal, a cyclic redundancy check (CRC) is added, and after channel coding, each independent PDCCH is configured. is transmitted In the time domain, the PDCCH is mapped and transmitted during the control channel transmission period. The frequency domain mapping position of the PDCCH is determined by an identifier (ID) of each terminal, and can be transmitted over the entire system transmission band.

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

Among 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) to the terminal through the MCS. In an embodiment, the MCS may consist of 5 bits or more or less bits. The TBS corresponds to a size before channel coding for error correction is applied to data (transport block, TB) to be transmitted by the base station.

In the present invention, a transport block (TB) may include a Medium Access Control (MAC) header, a MAC control element (CE), one or more MAC Service Data Units (SDUs), and padding bits. can Alternatively, TB may indicate a unit of data transmitted from the MAC layer to a physical layer or a MAC Protocol Data Unit (PDU).

Modulation schemes supported by the LTE system are Quadrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (16QAM), and 64QAM, and each modulation order (Qm) corresponds to 2, 4, and 6. That is, 2 bits per symbol can be transmitted in case of QPSK modulation, 4 bits per symbol in case of 16QAM modulation, and 6 bits per symbol in case of 64QAM modulation. In addition, a modulation scheme of 256QAM or higher may be used according to system modification.

2 is a diagram showing a basic structure of a time-frequency domain, which is a radio resource domain in which data or control channels are transmitted in uplink in an LTE-A system.

Referring to FIG. 2, the horizontal axis represents the time domain and the vertical axis represents the frequency domain. The minimum transmission unit in the time domain is an SC-FDMA symbol (2-02), and NsymbUL number of SC-FDMA symbols can be gathered to form one slot (2-06). And two slots are gathered to form one subframe (2-05). The minimum transmission unit in the frequency domain is a subcarrier, and the entire system transmission bandwidth (2-04) consists of a total of NBW subcarriers. NBW may have a value proportional to the system transmission band.

The basic unit of resources in the time-frequency domain is a resource element (RE, 2-12), which can be defined as an SC-FDMA symbol index and a subcarrier index. A resource block pair (2-08, Resource Block pair; RB pair) may be defined by NsymbUL number of consecutive SC-FDMA symbols in the time domain and NscRB number of consecutive subcarriers in the frequency domain. Accordingly, one RB is composed of NsymbUL x NscRB number of REs. In general, the minimum transmission unit of data or control information is an RB unit. In the case of PUCCH, it is mapped to a frequency domain corresponding to 1 RB and transmitted during 1 subframe.

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

In the LTE system, downlink HARQ adopts an asynchronous HARQ method in which a data retransmission time point is not fixed. That is, when HARQ NACK is received from the terminal for the initial transmission data transmitted by the base station, the base station freely determines the transmission time of the retransmission data through a scheduling operation. For the HARQ operation, the terminal performs buffering on the data determined to be erroneous as a result of decoding the received data, and then combines with the next retransmitted data.

When the terminal receives the PDSCH including the downlink data transmitted from the base station in subframe n, the base station transmits uplink control information including HARQ ACK or NACK of the downlink data in subframe n+k through PUCCH or PUSCH. send to At this time, the k is defined differently according to the FDD or time division duplex (TDD) of the LTE system and its subframe configuration. For example, in the case of an FDD LTE system, k is fixed to 4. Meanwhile, in the case of a TDD LTE system, k may be changed according to subframe configuration and subframe number.

Unlike downlink HARQ in an LTE system, uplink HARQ adopts a synchronous HARQ method in which a data transmission time point is fixed. That is, PUSCH (Physical Uplink Shared Channel), which is a physical channel for uplink data transmission, PDCCH, which is a downlink control channel that precedes it, and PHICH (Physical Hybrid The uplink/downlink timing relationship of the indicator channel is fixed according to the following rules.

When the terminal receives a PDCCH including uplink scheduling control information transmitted from the base station in subframe n or a PHICH through which downlink HARQ ACK/NACK is transmitted, the terminal transmits uplink data corresponding to the control information in subframe n+k It transmits through PUSCH. At this time, the k is defined differently according to FDD or time division duplex (TDD) of the LTE system and its settings. For example, in the case of an FDD LTE system, k is fixed to 4. Meanwhile, in the case of a TDD LTE system, k may be changed according to subframe configuration and subframe number. In the FDD LTE system, when a base station transmits an uplink scheduling grant or a downlink control signal and data to a terminal in subframe n, the terminal receives the uplink scheduling grant or downlink control signal and data in subframe n. First, if uplink scheduling approval is received in subframe n, the terminal transmits uplink data in subframe n+4. If a downlink control signal and data are received in subframe n, the terminal transmits a HARQ ACK or NACK for the downlink data in subframe n+4. Therefore, the time that the UE can prepare to receive uplink scheduling approval and transmit uplink data or receive downlink data and transmit HARQ ACK or NACK is 3 ms corresponding to three subframes. When the UE receives a PHICH carrying downlink HARQ ACK/NACK from the base station in subframe i, the PHICH corresponds to the PUSCH transmitted by the UE in subframe i-k. At this time, the k is defined differently depending on the FDD or TDD of the LTE system and its settings. For example, in the case of an FDD LTE system, k is fixed to 4. Meanwhile, in the case of a TDD LTE system, k may be changed according to subframe configuration and subframe number.

3 and 4 show how data for eMBB, URLLC, and mMTC, which are services considered in 5G or NR systems, are allocated in frequency-time resources.

Referring to Figures 3 and 4, it can be seen how frequency and time resources are allocated for information transmission in each system.

First, in FIG. 3, data for eMBB, URLLC, and mMTC is allocated in the entire system frequency band (3-00). If URLLC data (3-03, 3-05, 3-07) is generated and transmission is required while eMBB (3-01) and mMTC (3-09) are allocated and transmitted in a specific frequency band, eMBB (3-09) is transmitted. 01) and mMTC (3-09) can be emptied or the URLLC data (3-03, 3-05, 3-07) can be transmitted without transmission. Among the above services, since URLLC needs to reduce latency, URLLC data can be allocated (3-03, 3-05, 3-07) to a part of the eMBB-allocated resource (3-01) and transmitted. Of course, when URLLC is additionally allocated and transmitted in resources to which eMBB is allocated, eMBB data may not be transmitted in overlapping frequency-time resources, and thus transmission performance of eMBB data may be lowered. That is, in the above case, eMBB data transmission failure may occur due to URLLC allocation.

In FIG. 4, the entire system frequency band (4-00) can be divided and used to transmit services and data in each subband (4-02, 4-04, 4-06). Information related to the subband configuration may be determined in advance, and this information may be transmitted from the base station to the terminal through higher level signaling. Alternatively, the information related to the subband may be arbitrarily divided by the base station or the network node to provide services to the terminal without transmitting separate subband configuration information. In FIG. 4-, subband 4-02 is used for eMBB data transmission, subband 404 is used for URLLC data transmission, and subband 4-06 is used for mMTC data transmission.

Throughout the embodiments, the length of the transmission time interval (TTI) used for URLLC transmission may be shorter than the TTI length used for eMBB or mMTC transmission. In addition, URLLC-related information response can be transmitted faster than eMBB or mMTC, and thus information can be transmitted and received with low delay.

5 is a diagram illustrating a process in which one transport block is divided into several code blocks and a CRC is added.

Referring to FIG. 5, a CRC (5-03) may be added to the last or first part of one transport block (5-01, transport block; TB) to be transmitted in uplink or downlink. The CRC may have 16 bits or 24 bits, a fixed number of bits in advance, or a variable number of bits according to channel conditions, etc., and may be used to determine whether channel coding is successful. Blocks (5-01, 5-03) to which TB and CRC are added can be divided into several codeblocks (CB) (5-07, 5-09, 5-11, 5-13) (5 -05). The code block may be divided with a predetermined maximum size. In this case, the last code block (5-13) may have a smaller size than other code blocks, or 0, a random value, or 1 may be inserted to set the length with other code blocks. You can adjust them to be the same. CRCs 5-17, 5-19, 5-21, and 5-23 may be added to the divided code blocks (5-15). The CRC may have 16 bits or 24 bits or a pre-fixed number of bits, and may be used to determine whether channel coding is successful. However, the CRC (5-03) added to the TB and the CRCs (5-17, 5-19, 5-21, 5-23) added to the code block may be omitted depending on the type of channel code to be applied to the code block. may be For example, when LDPC codes are applied to code blocks instead of turbo codes, CRCs 5-17, 5-19, 5-21, and 5-23 to be inserted for each code block may be omitted. However, even when LDPC is applied, the CRCs 5-17, 5-19, 5-21, and 5-23 may be added to the code block as they are. Also, CRC can be added or omitted even when polar codes are used.

FIG. 6 is a diagram showing a transmission method using an outer code, and FIG. 7 is a block diagram showing the structure of a communication system using the outer code.

Referring to FIGS. 6 and 7 , a method of transmitting a signal using an outer code can be examined.

에 대해, CRC

는

를 상기 g_CRC24A(D)로 나누어 나머지가 0이 되는 값으로

를 결정할 수 있다. 상기에서 CRC 길이 L은 24인 일례로 설명하였지만 상기 길이는 12, 16, 24, 32, 40, 48, 64 등 여러 가지 길이로 결정 될 수 있을 것이다. 상기 분할된 CB들은 각각 CRC가 추가되며, CB의 CRC에는 TB의 CRC와는 다른 cyclic generator polynomial이 사용될 수 있다.6 shows that after one transport block is divided into several code blocks, the bits or symbols (6-04) at the same position in each code block are encoded into the second channel code to form parity bits or symbols (6-04). 06) can be created (6-02). After this, CRCs may be added to each of the code blocks and parity code blocks generated by the second channel code encoding (6-08, 6-10). The addition of the CRC may vary depending on the type of channel code. For example, when the turbo code is used as the first channel code, the CRCs 6-08 and 6-10 are added, but each code block and parity code blocks can be encoded by encoding the first channel code afterwards. have. The transport block is one TB transferred from an upper layer to a physical layer. In the physical layer, the TB is regarded as data. First, a CRC is added to the TB. TB data bits and cyclic generator polynomials may be used to generate the CRC, and the cyclic generator polynomials may be defined in various ways. For example, cyclic generator polynomial g _CRC24A (D) for a 24-bit CRC = D ²⁴ + D ²³ + D ¹⁸ + D ¹⁷ + D ¹⁴ + D ¹¹ + D ¹⁰ + D ⁷ + D ⁶ + D ⁵ + D ⁴ Assuming + D ³ + D + 1 and L=24, TB data

For, CRC

Is

Divided by the g _CRC24A (D), the remainder is 0.

can decide In the above, the CRC length L has been described as an example of 24, but the length may be determined by various lengths such as 12, 16, 24, 32, 40, 48, and 64. A CRC is added to each of the divided CBs, and a cyclic generator polynomial different from that of the TB may be used for the CRC of the CB.

In the conventional LTE system, when retransmission is performed due to initial transmission failure after initial data transmission, the initially transmitted TB is retransmitted. Unlike the conventional LTE system, retransmission in CB units or multiple CB units will be possible instead of TB units. To this end, it is necessary to transmit HARQ-ACK feedback of several bits per TB from the terminal. In addition, in the control information for scheduling from the base station at the time of retransmission, information indicating which part is to be retransmitted is provided.

When the outer code is used, data to be transmitted passes through the second channel coding encoder 7-09. As the channel code used for the second channel coding, for example, Reed-Solomon code, BCH code, Raptor code, parity bit generation code, etc. may be used. Bits or symbols passed through the second channel coding encoder 7-09 in this way pass through the first channel coding encoder 7-11. Channel codes used for the first channel coding include convolutional codes, LDPC codes, Turbo codes, Polar codes, and the like. When the channel-coded symbols pass through the channel 7-13 and are received by the receiver, the receiver side uses the first channel coding decoder 7-15 and the second channel coding decoder 7-17 based on the received signal. Can be operated sequentially. The first channel coding decoder 7-15 and the second channel coding decoder 7-17 perform operations corresponding to the first channel coding encoder 7-11 and the second channel coding encoder 7-09, respectively. can do.

On the other hand, in the channel coding block diagram in which the outer code is not used, only the first channel coding encoder 7-11 and the first channel coding decoder 7-05 are used in the transceiver, respectively, and the second channel coding encoder and the second channel coding Decoders are not used. Even when the outer code is not used, the first channel coding encoder 7-11 and the first channel coding decoder 7-05 can be configured in the same way as when the outer code is used.

The eMBB service described below is referred to as a first type service, and data for eMBB is referred to as a first type data. The first type service or the first type data is not limited to eMBB and may be applicable even when high-speed data transmission is required or broadband transmission is performed. In addition, the URLLC service is referred to as the second type service, and the data for URLLC is referred to as the second type data. The second type service or the second type data is not limited to URLLC, and may be applicable to other systems requiring low latency or high reliability transmission or simultaneous low latency and high reliability. In addition, the mMTC service is referred to as the third type service, and the data for mMTC is referred to as the third type data. The third type service or the third type data is not limited to mMTC and may correspond to a case where low speed or wide coverage or low power is required. Also, when describing the embodiment, it may be understood that the first type service includes or does not include the third type service.

The structure of a physical layer channel used for each type to transmit the three services or data may be different. For example, at least one of a length of a transmission time interval (TTI), a frequency resource allocation unit, a structure of a control channel, and a data mapping method may be different.

Although three services and three types of data have been described above, more types of services and corresponding data may exist, and the content of the present invention may also be applied in this case.

The terms physical channel and signal in a conventional LTE or LTE-A system may be used to describe the method and apparatus proposed in the embodiment. However, the contents of the present invention can be applied to wireless communication systems other than LTE and LTE-A systems.

As described above, the embodiment defines the transmission/reception operation of the terminal and the base station for transmission of the first type, second type, and third type service or data, and transmits and receives terminals receiving different types of service or data scheduling within the same system. Suggests specific ways to operate together in In the present invention, the first type, second type, and third type terminals refer to terminals that have received type 1, type 2, and type 3 services or data scheduling, respectively. In an embodiment, the first type terminal, the second type terminal, and the third type terminal may be the same terminal or may be different terminals.

8 shows that the eMBB data 8-03 is scheduled by the base station to the terminal a using the control signal 8-01, and then, when the eMBB data 8-03 is transmitted, a portion of the resource to which the eMBB data is mapped ( 8-07) and transmits other data (8-07) to the same terminal a or another terminal b, and then transmits some of the eMBB data (8-15) that was or could not be transmitted to terminal a in the next TTI (8 -10) is a diagram showing retransmission. The partially retransmitted unit may be a CB or a CB group composed of one or more CBs. The eMBB control signal (8-01) delivers scheduling information for eMBB data (8-03) to terminal a, and URLLC data is generated while the eMBB data (8-03) is being transmitted, so the base station controls URLLC to terminal b. It transmits signals and data (8-07). Transmission of the URLLC control signal and data is performed by mapping and transmitting URLLC control signal and data (8-07) without mapping a part of previously scheduled eMBB data (8-03) to a resource. Therefore, part of the eMBB was not transmitted in the existing TTI (8-05), and thus the eMBB terminal may fail to decode the eMBB data. To compensate for this, some eMBB data not transmitted in 8-05 TTI is transmitted (8-13) in 8-10 TTI. The partial transmission is performed in the TTI (8-10) after the initial transmission, and can be performed without receiving HARQ-ACK information for the initial transmission from the terminal, and the partial transmission is performed in the control signal area (8-09) of the next TTI. ), scheduling information may be delivered. When eMBB or other data (8-17) is transmitted to another terminal in the control signal area (8-09) of the next TTI, information on the symbol position at which eMBB or other data (8-17) resource mapping starts (8-11) can be included. The information can be delivered in some bits of downlink control information (DCI) transmitted in the control signal area 8-09. Partial transmission (8-15) of the previous initial transmission is performed in a specific symbol using information on a symbol position where resource mapping of eMBB or other data (8-17) starts. The eMBB control signals 8-01 and 8-09 of FIG. 8 may not be transmitted in all of the displayed regions but only in some regions. Also, it is possible that the control signals 8-01 and 8-09 are transmitted only in some frequency bands instead of the entire frequency band.

In the above, an example of partial retransmission (8-15) in the next TTI has been described because a portion of the eMBB is not transmitted for transmission of URLLC data (8-07). It may be used for the purpose of retransmitting a specific part. In addition, an example of partially retransmitting (8-15) in the next TTI has been described because a portion of the eMBB is not transmitted for transmission of URLLC data (8-07). It can be distinguished by the initial transmission of That is, the UE that has received partial retransmission (8-15) in the next TTI (8-10) does not perform HARQ decoding by combining with the portion received in the previous TTI (8-05), and in the next TTI (8-10) ), separate decoding can be performed using only some retransmissions (8-15). In addition, although the case of retransmission from the first symbol after the control signal in the TTI (8-10) after the initial transmission has been described, it will be possible to change and apply the location of retransmission in various ways. In addition, although the case of downlink transmission has been described above as an example, it may be possible to easily modify and apply the case to uplink transmission as well. Figures (b) and (c) of Figure H are diagrams showing an example in which CB2 and CB3 are retransmitted among the six initially transmitted CBs, respectively. In this way, a method of retransmitting only some CBs or CB-groups (CB-groups) of initially transmitted TBs in the NR system may be applied.

In the present invention, the operation of the base station and the terminal is described for the method of retransmitting the CBG unit described above. In the present invention, terms such as CB group retransmission, CBG unit retransmission, partial retransmission, and CBG retransmission may be used interchangeably.

Hereinafter, embodiments of the present invention will be described in detail with accompanying drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or operator. Therefore, the definition should be made based on the contents throughout this specification. Hereinafter, a base station is a subject that performs resource allocation of a terminal, and may be at least one of an eNode B, a Node B, a base station (BS), a wireless access unit, a base station controller, or a node on a network. The terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing communication functions. In the present invention, downlink (DL) is a radio transmission path of a signal transmitted from a base station to a terminal, and uplink (UL) refers to a radio transmission path of a signal transmitted from a terminal to a base station. In addition, although an embodiment of the present invention is described below using an LTE or LTE-A system as an example, the embodiment of the present invention can be applied to other communication systems having a similar technical background or channel type. For example, the 5th generation mobile communication technology (5G, new radio, NR) developed after LTE-A may be included in this. In addition, the embodiments of the present invention can be applied to other communication systems through some modifications within a range that does not greatly deviate from the scope of the present invention based on the judgment of a skilled person with technical knowledge.

In the present invention, a transmission time interval (TTI) means a unit in which a control signal and a data signal are transmitted, or may mean a unit in which a data signal is transmitted. For example, in the downlink of the existing LTE system, the transmission time interval becomes a subframe that is a time unit of 1 ms. Meanwhile, in the present invention, a transmission time interval in uplink may mean a unit in which a control signal or a data signal is transmitted, or a unit in which a data signal is transmitted. A transmission time period in the uplink of the existing LTE system is a subframe that is a time unit of 1 ms, which is the same as that of the downlink. On the other hand, in the NR system, a TTI for data transmission may be a slot or a mini-slot.

In the present invention, the conventional terms of a physical channel and a signal may be used interchangeably with data or control signals. For example, PDSCH is a physical channel through which data is transmitted, but in the present invention, PDSCH may be referred to as data.

Hereinafter, in the present invention, an uplink scheduling grant signal and a downlink data signal are referred to as a first signal. Also, in the present invention, an uplink data signal for uplink scheduling grant and an HARQ ACK/NACK for a downlink data signal are referred to as a second signal. In the present invention, among signals transmitted from a base station to a terminal, a signal expecting a response from the terminal may be a first signal, and a response signal of the terminal corresponding to the first signal may be a second signal. Also, in the present invention, the service type of the first signal may belong to categories such as eMBB, mMTC, and URLLC.

Hereinafter, in the present invention, the TTI length of the first signal means the length of time during which the first signal is transmitted. Also, in the present invention, the TTI length of the second signal means the length of time during which the second signal is transmitted. Also, in the present invention, the second signal transmission timing is information about when the terminal transmits the second signal and when the base station receives the second signal, and may be referred to as second signal transmission/reception timing.

If there is no mention of a TDD system in the present invention, an FDD system will be generally described. However, the method and apparatus of the present invention in an FDD system may also be applied to a TDD system according to a simple modification.

Hereinafter, upper signaling in the present invention is a method of transmitting a signal from a base station to a terminal using a downlink data channel of the physical layer or from a terminal to a base station using an uplink data channel of the physical layer, and RRC signaling or MAC control element. (CE; control element).

[First Embodiment]

In the first embodiment, a method of performing interleaving between CBs in one CBG in performing CBG unit retransmission will be described with reference to FIGS. 9, 10, and 11. Here, interleaving between CBs may mean mixing the order of bits of CBs.

라혹은 N_{CB}^{CBGk}고 하기로 한다. 도 9(a)에서는 CBG안의 CB들이 순차적으로 매핑되는 방법이며, 도 9(b)는 CBG안의 CB들의 비트들이 섞여서 매핑되는 방법이다. 만약 URLLC 전송 등의 이유로 CBG안의 자원 일부분이 puncturing 되거나 전송되지 않는 경우에, puncturing이나 일부 전송하지 않음으로 인해 성능열화가 발생하는데, 도 9(b)에서 제시한 방법이 도 9(a) 방법에 비해서 상기의 성능열화를 줄일 수 있다. 9 shows the order in which CBs in the CBG are mapped. The number of CBs in the kth CBG

Lahok decides to say N_{CB}^{CBGk}. In FIG. 9(a), the CBs in the CBG are sequentially mapped, and in FIG. 9(b), the bits of the CBs in the CBG are mixed and mapped. If some of the resources in the CBG are punctured or not transmitted for reasons such as URLLC transmission, performance degradation occurs due to puncturing or partial non-transmission. In comparison, the above performance degradation can be reduced.

라 하고,

개의 CB들 전체 비트 수를 G라고 하자. 채널코딩 된 이후의 CBG안의 m번째 비트를

라고 하자. 본 발명에서 제공하는 CBG 인터리버는

들을

로 변경하는 역할로 볼 수 있다. 이제

부터

까지 혹은

부터

까지의 G비트들로 하기와 같은 행렬을 구성할 수 있다. An example of the method of mixing the CB bits in the CBG above can be performed as follows. the number of kth CBs

say,

Let G be the total number of bits of the number of CBs. The mth bit in the CBG after channel coding

let's say The CBG interleaver provided by the present invention

hear

It can be seen as a role that changes to . now

from

until or

from

Up to G bits can constitute the following matrix.

와

를 각각

와

로 하기로 하자. 즉, CBG안의 코딩된 비트들을 row로 먼저 나열하는 방식으로 상기 행렬이 구성된다. 이후,

들은 상기 행렬에서 원소들을 column 방향으로 먼저

들을 읽어

들을 만드는 방법으로 구성할 수 있다. 즉,

는 하기의 수도코드 형태의 알고리즘 1과 같은 방법으로 구성된다. remind

Wow

to each

Wow

let's do it That is, the matrix is constructed in such a way that coded bits in the CBG are first arranged in rows. after,

elements in the matrix in the column direction first

read the

It can be configured in a way that makes them. in other words,

is constructed in the same way as Algorithm 1 in the form of pseudocodes below.

[Algorithm 1]

The above example is an algorithm for evenly distributing bits of CBs in CBG, and can be modified and applied in various ways to evenly mix CBs.

The receiver needs to perform deinterleaving to configure CBGs in the order of CBs again from the CBs mixed through the interleaving, and can be performed by Algorithm 2 as follows.

[Algorithm 2]

와

를 각각

와

로 하기로 하자. 상기 알고리즘 2는 하기와 같은 행렬 구성에서,

들은 상기 행렬에서 원소들을 column 방향으로 먼저

들을 읽어

들을 만드는 방법으로 구성하는 것이다. remind

Wow

to each

Wow

let's do it Algorithm 2 is in the following matrix configuration,

elements in the matrix in the column direction first

read the

It is to organize them in a way that makes them.

That is, through a deinterleaver, the CBGs in the CBG are changed to a structure in which they are sequentially mapped, and then the receiver can sequentially receive data through channel decoding of the CBs. The above example is an algorithm for sequentially mapping the bits of CBs in the CBG, and can be modified and applied in various ways to achieve the above purpose.

10 is a diagram illustrating an operation of a base station transmitting data by performing CBG interleaving in downlink data transmission. The base station performs code block division and channel coding to prepare for TB transmission (10-02). If CBG-based retransmission is set, CBGs are configured with the set or calculated number of CBGs, and interleaving is performed within the CBGs (10-06). If CBG-based retransmission is not configured, interleaving is not performed between CBs (10-10). After that, it is sequentially mapped to frequency and time resources and transmitted. The above operation may be performed by the terminal in uplink data transmission.

11 is a diagram illustrating an operation of a terminal receiving data by performing CBG deinterleaving in downlink data transmission. The terminal performs channel estimation and demodulation for TB reception (11-02). If CBG-based retransmission is set, CBGs are configured with the set or calculated number of CBGs, deinterleaving is performed in the CBGs (11-06), and channel decoding of CBs is sequentially performed (11-08). If CBG-based retransmission is not set, deinterleaving of CBs is not performed (11-10), and channel decoding of CBs is sequentially performed (11-12). The above operation may be performed by a base station in uplink data transmission.

In this embodiment, interleaving in which CBs in the CBG are evenly mixed has been described, but a non-uniform method of mixing CBs can also be applied. In addition, it may be possible to apply the interleaver only when the number of CBs in the CBG exceeds a certain number.

The interleaving method in the CBG provided by this embodiment may be determined to be used according to the setting of the base station. That is, if the base station is configured to use interleaving within the CBG, the base station and the terminal perform interleaving and deinterleaving operations within the CBG, but when the base station is set to not use interleaving within the CBG, the base station and the terminal perform interleaving and deinterleaving within the CBG. action may not be performed. For example, if the base station is configured to use intra-CBG interleaving, CBG mapping is performed in the same manner as in FIG. ) can be performed in the same way. Configuration of interleaving use in the CBG may be performed by upper signaling such as MAC CE or RRC signaling.

[Second Embodiment]

The second embodiment describes a method for setting the number of CBGs when setting and using CBG-based retransmission.

The base station may use a CBG-based retransmission method in downlink or uplink data transmission, and the base station and the terminal need to know the number of CBGs to apply the method. To this end, the base station may set the number of CBGs to be used or the maximum number of CBGs to the terminal. At this time, the base station may set one or more or several CBG numbers, or several maximum CBG numbers to the terminal. In the present invention, the number of CBGs and the maximum number of CBGs can be mixed and used. The base station and the terminal may determine the number of CBGs to be used for data transmission among the set number of CBGs based on TBS, TTI length, number of allocated symbols, and the like. For example, when the base station sets the number of CBGs of 2, 4, 6, and 8 to the terminal, based on TBS reference value 1, TBS reference value 2, and TBS reference value 3, if the scheduled TBS is less than the TBS reference value 1, the CBG Assuming that the number is 2, and if TBS greater than TBS reference value 2 and less than TBS reference value 3 are scheduled, the number of CBGs is assumed to be 4; if TBS greater than TBS reference value 3 and less than TBS reference value 4 are scheduled, the number of CBGs is assumed to be 6 , If a TBS greater than the TBS reference value 4 is scheduled, the number of CBGs may be assumed to be 8. Alternatively, the number of CBGs may be determined according to the set number of layers. Alternatively, according to the number of minislots or PDCCH monitoring intervals in one slot according to the minislot length or PDCCH monitoring period set to be used, the number of CBGs to be actually applied may be selected from among several set values for the number of CBGs.

[Third Embodiment]

In the third embodiment, when a base station determines the number of CBGs to be used by a terminal or the number of HARQ-ACK bits to be transmitted by a terminal per TB in CBG-based retransmission, the base station determines by referring to the UE capability reported by the terminal. A method of transmitting information to a base station in the form of UE capability will be described.

The maximum value of the number of HARQ-ACK feedback bits that the terminal can transmit in one slot or one minislot, or the first PUCCH format, the second PUCCH format, the third PUCCH format, . . . , the maximum value of the number of bits of uplink control information that can be transmitted using the N-th PUCCH format or the type of PUCCH format transmittable among the n-th PUCCH formats to the base station. The nth PUCCH format may be a PUCCH format with a short TTI or a PUCCH format with a long TTI length, and in the present invention, uplink control information may include HARQ-ACK feedback.

As another example, when the carrier aggregation technology is used, the UE may report the maximum number of transmittable uplink control information bits for each serving cell accessed by the UE or the type of PUCCH format supported by the UE to the base station.

As another example, the UE can transmit the maximum value of the number of uplink control information bits that can be transmitted or the type of PUCCH format supported by the UE according to each case for the number of layers, the number of ranks, and whether or not CoMP transmission is supported in data transmission. report to the base station.

When the base station sets the number of CBGs, the maximum number of CBGs, or the number of HARQ-ACK feedback bits to be transmitted by the terminal to the terminal, it will be possible to set an arbitrary value based on the UE capability reported by the terminal to the base station.

[Fourth Embodiment]

The fourth embodiment informs how the UE transmits HARQ-ACK when downlink data transmission using CBG unit retransmission is performed, or which CBG is retransmitted when instructing retransmission of downlink or uplink data. explain how.

The base station sets the maximum number of CBGs in which retransmission is performed in CBG units, and let this be M in the present invention. That is, for example, when N CBGs are set and divided in one TB, if the number of CBGs greater than M requires retransmission, the entire TB is retransmitted, and CBGs equal to or smaller than M are retransmitted due to transmission failure. This is a method for retransmitting only the necessary CBGs if necessary, and by using this, the number of HARQ-ACK bits or the number of CBG indication bits can be reduced.

비트의 HARQ-ACK 피드백을 기지국으로 전송한다. 상기에서

는 밑이 2인 로그를 이용한 X의 로그값을 의미한다. 또한 상기에서

은 N개 중에 m개를 선택하는 경우의 수를 의미할 수 있으며,

는 X보다 큰 최소의 정수를 의미할 수 있다. 일례로, N=4이고, M이 1인 경우에는, N개중에 0개를 선택하는 경우의 수 1, N개중에 1개를 선택하는 경우의 수 4이므로,

는

이 되고, 따라서 3비트가 요구된다. 상기에서 3비트 중, 111은 모든 TB의 재전송을 요구하는 비트일 수 있다. 즉,

비트가 모두 1이라는 의미는 TB 전체의 재전송을 요구하는 것일 수 있다. 이는 M보다 많은 수의 CBG가 전송 실패하였을 때 사용될 수 있다. 상기 에서 M개 이하의 CBG가 전송실패하였다는 것을 가리키는 것은 별도의 방정식을 통해 구해지는 값으로

비트로 구성되는 값이 된다. The base station sets CBG unit retransmission to the terminal, sets the maximum number of CBGs to N, and sets the maximum number of CBGs capable of CBG unit retransmission to M. When one TB transmits in downlink data transmission, the terminal

Bits of HARQ-ACK feedback are transmitted to the base station. from above

is the logarithmic value of X using the base 2 logarithm. Also from above

may mean the number of cases in which m are selected out of N,

may mean the smallest integer greater than X. For example, if N = 4 and M is 1, the number of cases of selecting 0 out of N is 1 and the number of cases of selecting 1 out of N is 4,

Is

, so 3 bits are required. Among the above 3 bits, 111 may be a bit requesting retransmission of all TBs. in other words,

The meaning that all bits are 1 may mean that retransmission of the entire TB is requested. This can be used when more than M CBGs have failed to transmit. In the above, indicating that less than M CBGs have failed transmission is a value obtained through a separate equation.

It becomes a value composed of bits.

비트로서, 하향링크 및 상향링크 스케줄링을 위한 DCI에 포함되는 것일 수 있다. 상기에서

비트의 구성은 앞에서 설명한 HARQ-ACK 피드백 비트를 구성하는 방법과 동일하게 적용되는 것일 수 있으며,

비트가 모두 1인 경우에는 해당 TB의 전체 CBG들이 다시 재전송되거나 재전송을 요구하는 것일 수 있다. Similar to the HARQ-ACK feedback transmission method, CBG indiaction for CBG unit retransmission can be used in downlink and uplink retransmission. The CBG indication is

As a bit, it may be included in DCI for downlink and uplink scheduling. from above

The configuration of the bit may be applied in the same way as the method of configuring the HARQ-ACK feedback bit described above,

When all bits are 1, all CBGs of the corresponding TB may be retransmitted again or retransmission may be requested.

[Fifth Embodiment]

The fifth embodiment provides a method for mapping CBs to an integer number of symbols when mapping CBs to allocated frequency and time resources for data transmission.

12 is a diagram illustrating mapping of 6 code blocks (CBs) to allocated frequency-time resources. In the conventional LTE, the allocated frequency-time resource is divided by the number of CBs, and the CBs are determined to be mapped to the maximum similar number of resource elements (REs). In FIG. 12, six CBs are mapped by dividing the allocated resources into as many REs as possible.

If the same mapping as in FIG. 12 is used in NR, CBs to be mapped in the 5th symbol are punctured and data for other services are mapped to other terminals or to the same terminal, CBs to be mapped to the 5th symbol All of them may fail to transmit. For example, as CB4 and CB5, which were supposed to be mapped to the fifth symbol in FIG. 12, are punctured, transmission of both CB4 (12-14) and CB5 (12-15) may fail. Therefore, in order to minimize performance degradation due to puncturing of CBs for data transmission of other terminals or other services, when the number of scheduled CBs is less than the number of allocated OFDM symbols, one CB is mapped to one or two or more integer OFDM symbols. . Also, when the number of scheduling CBs is greater than the number of allocated OFDM symbols, one or two or more integer number of CBs are mapped to one OFDM symbol. In the same way as above, it is possible to maximally align the end of CBs and the end of an OFDM symbol.

13 shows an example of a mapping method in which CBs and OFDM symbols are aligned when 7 OFDM symbols are allocated for data transmission in the frequency domain 13-02 allocated to the UE and a total of 6 CBs are scheduled to be transmitted. It is an illustrated drawing. CB1(13-11) is mapped over 2 OFDM symbols, the remaining CB2(13-12), CB3(13-13), CB4(13-14), CB5(13-15), CB6(13-16) ) are each mapped to one OFDM symbol. To this end, the number of information bits included in each CB may be different. For CB sizes of different lengths, it may be possible to divide the TB in consideration of the number of symbols of resources allocated to the UE by the base station in the process of dividing the TB into several CBs. 14-(a), (b), (c), (d), (e), (f), and (g) show 1, 2, 3, 4, and 5 assigned resources, respectively. It is a diagram showing an example of maximally aligning symbols and CBs when 7 and 14 CBs are mapped. Mapping as shown in FIG. 14 may also be possible.

[Sixth Embodiment]

The sixth embodiment provides a method for informing a terminal of the number of CBGs currently being transmitted in downlink or to be transmitted in uplink by a base station in DCI.

A base station can schedule one or two TBs.

At this time, information on the sum of the numbers of CBGs included in the two TBs is informed in a specific bit field of the DCI. For example, when the maximum number of CBGs constituting one TB is set to 4 as higher level signaling, a maximum of 8 CBGs may exist in two TBs. When scheduling initial transmission and retransmission, the base station may inform the terminal of the number of currently transmitted CBGs through a specific bit field of the DCI. For example, when only the first CBG is retransmitted in the first TB and the second and third CBGs are retransmitted in the second TB, information that three CBGs are being transmitted is transmitted in the scheduling DCI as 3 bits such as 010. it is possible to tell That is, it is possible to interpret that the value obtained by converting the 3-bit xxx value in DC to a decimal number and adding 1 to the number of CBGs. Accurate information of the CBG being transmitted may be based on HARQ-ACK information for the corresponding TB previously transmitted from the terminal to the base station. In the retransmission example above, if only the first CBG is retransmitted in the first TB, and the second and third CBGs are retransmitted in the second TB, the first CBG in the first TB fails to decode in the initial transmission, Since decoding of the second and third CBGs in the second TB would have failed, the terminal would have delivered the corresponding decoding result information to the base station as HARQ-ACK using several bits, and the CBG information for which the HARQ-ACK information is being retransmitted can be

[Embodiment 7]

In the seventh embodiment, when a UE operates in one component carrier in downlink transmission, that is, when carrier aggregation (CA) is not configured and CBG unit retransmission is performed, in the process of transmitting HARQ-ACK explain about

The base station may configure two physical resources for HARQ-ACK transmission of downlink data to the terminal. The resource may include only a PRB index in the frequency domain or may include information on how many OFDM symbols to use. The two resources may be resources for uplink control channel mapping. Therefore, let's call them PUCCH resource 1 and PUCCH resource 2, respectively. The PUCCH resource 1 can be used to transmit 1-bit HARQ-ACK information, and the PUCCH resource 2 can be used to transmit HARQ-ACK information of more than 1 bit. When CBG retransmission is configured and the number of CBGs is greater than 1, the UE may transmit using PUCCH resource 2 to transmit HARQ-ACK information of the CBG. In the CBG configuration, when all CBGs are transmitted successfully or all CBGs fail to transmit, 1-bit HARQ-ACK information can be transmitted using PUCCH resource 1. In the above, whether transmission of the CBG is successful may be determined when the CRC check of CBs included in the CBG passes, or when the CRC check inserted in units of CBG passes. In addition, when it is determined that all CBGs are transmitted successfully, but the CRC check in units of TB fails, PUCCH resource 1 may be used for transmitting the corresponding HARQ-ACK information. For example, PUCCH resource 1 may be used when the CRC check of all CBs passes but the CRC check of TB fails. The PUCCH formats transmitted on the PUCCH resource 1 and the PUCCH resource 2 may be different, and each base station may set the UE to higher signaling.

[Eighth Embodiment]

The eighth embodiment describes a method in which a UE sends HARQ-ACK feedback to a base station when a UE configured for partial retransmission receives downlink transmission. This embodiment is a method in which a terminal configures one or more bits to generate HARQ-ACK information in units of a CB group (code-block group: CBG). In detail, it may be when the number of CBs included in the scheduled TB is smaller than the set number of CBGs or the set maximum number of CBGs. For example, when the set maximum number of CBGs is 7, it may be when the number of CBs included in the scheduled TB is less than 7.

Let the set number of CBGs or the set maximum number of CBGs be N_{CBG,max}. N_{CBG,max} can be mixed with N _{CBG ,max} . Let C be the number of CBs included in the scheduled TB. In this embodiment, the number C of CBs included in a TB may be equal to the number M of CBGs of the corresponding TB. Therefore, the number C of CBs in the following examples may mean the number M of CBGs.

When the number of CBs included in the scheduled TB is smaller than the set number of CBGs or the set maximum number of CBGs, that is, when M < N_{CBG,max}, the UE configures HARQ-ACK information of N_{CBG,max} bits In doing so, the preceding M bits may be configured according to whether decoding of each CBG is successful. For example, if decoding of the k-th CBG succeeds, the k-th bit is set to 0, and if decoding of the k-th CBG fails, the k-th bit is set to 1. In the above, whether or not the decoding of the CBG is successful can be determined according to whether the terminal checks the CRCs of the CBs in the CBG and passes. In the above, since the number of CBs is smaller than the set number of CBGs, the actual number of CBGs included in the corresponding TB is C=M, and each CBG includes one CB. Accordingly, whether decoding of the k-th CB is successful is equal to whether or not transmission of the k-th CBG is successful. In the following, when the terminal configures HARQ-ACK information of N_{CBG,max} bits, a method of configuring N_{CBG,max} - M bits other than the preceding M bits is provided in this embodiment. This embodiment has been described for the case of M < N_{CBG,max} or C < N_{CBG,max}, but can also be applied to the case of M = N_{CBG,max} or M ≥ N_{CBG,max} have.

When the terminal configures HARQ-ACK information of N_{CBG,max} bits, an example of a method of configuring N_{CBG,max}-M bits other than the previous M bits is ACK/NACK of the previous M bits How to make decisions based on information. In the following, a case of mapping ACK to 1 and NACK to 0 will be described, but the principle of the present embodiment can be applied to the opposite case as well. For example, when at least one of the preceding M bits is 1, if at least one CBG is successfully decoded, all N_{CBG,max}-M bits are determined to be 1, and the preceding M bits are all 0. , that is, only when decoding of all CBGs fails, all N_{CBG,max}-M bits are determined to be 0. That is, the above example can be determined in the following way. In the following, O_k is the kth HARQ-ACK bit.

Or conversely, if decoding of at least one CBG fails, all N_{CBG,max}-M bits are set to 0, and only if all CBGs are successfully decoded, all N_{CBG,max}-M bits are set to 1. , which can be expressed by the following formula.

는 O_i, 0≤i < M,들끼리의 binary AND operation로 대신하여 사용될 수 있으며 같은 의미를 갖을 수 있다. from above

may be used instead of a binary AND operation between O_i, 0≤i < M, and may have the same meaning.

Alternatively, a method of continuously repeating the previous M bits to fill N_{CBG,max}-M bits is also possible and can be expressed by the following formula.

● O_k: HARQ ACK(1) or NACK(0) for k-th CBG, where 0≤k < M

● O_k = O_mod(k, M), where M ≤ k < N_{CBG,max}

The formula may be written as the following formula.

● O_k: HARQ ACK(1) or NACK(0) for mod(k, M)-th CBG, where 0≤k < N_{CBG,max}

In this embodiment, mod(a,b) may be the remainder of dividing a by b, and may be expressed as a-floor(a/b)×b. In this embodiment, floor(x) is the largest integer not greater than x.

Alternatively, N_{CBG,max} - M bits may be determined according to whether the TB-CRC check succeeds or not. That is, when the TB-CRC check succeeds, it is possible to set all N_{CBG,max}-M bits to 1, and to set all to 0 in other cases, which can be expressed by the following formula have.

As another example, all CRCs added to CB pass and it is determined that all CBGs are successfully transmitted, but if the TB-CRC check, which is the CRC added to TB, does not pass, all HARQA-ACK bits can be set to 0, which is It is expressed by the following formula.

In the above embodiments, in configuring N_{CBG,max}-M bits other than M bits having HARQ-ACK information of CBGs as a bit-map, M bits having HARQ-ACK information of CBGs as a bit-map The purpose of using the information may be to improve decoding performance of a base station receiving the HARQ-ACK information.

Alternatively, a method of unconditionally fixing N_{CBG,max}-M bits to 0 or 1 may be used as shown in the following formula.

● O_k: HARQ ACK(1) or NACK(0) for k-th CBG, where 0≤k < M

● O_k = 0, where M ≤ k < N_{CBG,max}

or

● O_k: HARQ ACK(1) or NACK(0) for k-th CBG, where 0≤k < M

● O_k = 1, where M ≤ k < N_{CBG,max}

O_k fixed to 0 or 1 in the above formula is assumed to be a known bit when the base station performs decoding, and decoding is performed to increase decoding performance. For example, when uplink control information (UCI) including HARQ-ACK information is encoded using a polar code and transmitted, the base station converts the HARQ-ACK information bit fixed to 0 or 1 to a bronze bit. By setting, decoding of polar codes can be performed.

15 is a flowchart illustrating an operation of a base station related to a terminal in which the terminal generates HARQ-ACK information according to CBG configuration. The base station configures CBG retransmission to the terminal and sets parameters such as the maximum number of CBGs as upper signaling (15-02). After that, when the base station schedules downlink data to the terminal (15-04), the terminal can determine the number of CBGs actually transmitted to the scheduled TB. M scheduled CBGs generate M-bit HARQ-ACK feedback information according to whether decoding is successful (15-06). If M is smaller than N_{CBG.max}, N_{CBG.max} - M Bit HARQ-ACK information is generated (15-08). The terminal transmits the generated HARQ-ACK information of N_{CBG,max} bits to the base station using uplink (15-10).

[Embodiment 9]

The ninth embodiment provides a method for a terminal to configure HARQ-ACK information. More specifically, a method for configuring an order when configuring HARQ-ACK bits for CBGs transmitted in multiple component carriers or frequency parts (bandwidth parts) and multiple slots is provided.

는 단말이 특정 슬롯 혹은 미니슬롯에서 전송해야할 HARQ-ACK 피드백 비트수이며, HARQ-ACK 피드백 정보 수열은

라고 하기로 한다.

is the number of HARQ-ACK feedback bits to be transmitted by the terminal in a specific slot or minislot, and the HARQ-ACK feedback information sequence is

let's say

은 단말이 특정 슬롯 혹은 미니슬롯에서 하나의 상향링크 전송으로 HARQ-ACK 피드백을 전송해야할 component carrier (cc) 수이며,

은 단말이 특정 슬롯 혹은 미니슬롯에서 하나의 상향링크 전송으로 HARQ-ACK 피드백을 전송해야할 하향링크 PDSCH의 수 혹은 하향링크 슬롯 혹은 미니슬롯의 수이다.

는 c번째 cc에서 설정된 최대 CBG 수이다. 상기 TB 당 가질 수 있는 최대 CBG 수이며, 단말이 하나의 TB에 대해 전송해야할 HARQ-ACK 비트수일 수 있다.

는 c번째 cc의 l번째 slot 혹은 미니슬롯에서 전송되는 TB의 i 번째 CBG에 대한 HARQ-ACK 피드백 정보이다. 해당 TB의 CB수가 설정된

보다 작을 경우에는, TB의 CBG 수가

보다 작을 수 있으며, 단말이 전송해야하는

비트 중에서 CBG에 해당하는 HARQ-ACK 정보 이외의 비트는 임의의 방식으로 정해질 수 있으며, 일례로는 상기 제7실시예에 따라 결정될 수 있다.

is the number of component carriers (cc) for which the UE should transmit HARQ-ACK feedback in one uplink transmission in a specific slot or minislot,

is the number of downlink PDSCHs or downlink slots or minislots to which the UE should transmit HARQ-ACK feedback in one uplink transmission in a specific slot or minislot.

Is the maximum number of CBGs set in the cth cc. This may be the maximum number of CBGs per TB, and may be the number of HARQ-ACK bits to be transmitted by the UE for one TB.

is HARQ-ACK feedback information for the i-th CBG of TB transmitted in the l-th slot or minislot of the c-th cc. The number of CBs in the TB is set.

less, the number of CBGs in TB

It can be smaller than that, and the terminal must transmit

Among the bits, bits other than the HARQ-ACK information corresponding to the CBG may be determined in an arbitrary manner, and as an example, may be determined according to the seventh embodiment.

In the following, a codeword (CW) per PDSCH, that is, a pseudo-code for a case in which only one TB is included is provided.

[Pseudo-code 1]

[start]

[End]

The pseudo-code can be expressed as a flowchart similar to that of FIGS. 16A and 16B.

는 c번째 cc에서 하나의 PDSCH에 포함될 수 있는 CW 수이며 상위 시그널링 혹은 L1 시그널링으로 설정될 수 있다.

는 c번째 cc에서 설정된 n번째 CW의 최대 CBG 수이다. 상기 CW 당 가질 수 있는 최대 CBG 수이며, 단말이 하나의 CW에 대해 전송해야할 HARQ-ACK 비트수일 수 있다.

는 c번째 cc의 l번째 slot 혹은 미니슬롯에서 전송되는 n번째 CW의 i 번째 CBG에 대한 HARQ-ACK 피드백 정보이다. 해당 CW의 CB수가 설정된

보다 작을 경우에는, CW의 CBG 수가

보다 작을 수 있으며, 단말이 전송해야하는

비트 중에서 CBG에 해당하는 HARQ-ACK 정보 이외의 비트는 임의의 방식으로 정해질 수 있으며, 일례로는 상기 제7실시예에 따라 결정될 수 있다.

들은 CW마다 다르게 설정될 수도 있고, 혹은 같게 설정될 수 있다. 본 발명에서 CW와 TB는 혼용될 수 있다.If cc configured to transmit two CWs per TB is included, the following pseudo-code 2 can be used. in the following

is the number of CWs that can be included in one PDSCH in the cth cc and can be set by upper signaling or L1 signaling.

is the maximum number of CBGs of the n-th CW set in the c-th cc. This is the maximum number of CBGs that can have per CW, and may be the number of HARQ-ACK bits to be transmitted by the UE for one CW.

is HARQ-ACK feedback information for the i-th CBG of the n-th CW transmitted in the l-th slot or minislot of the c-th cc. The number of CBs in the corresponding CW is set.

If it is smaller, the number of CBGs in CW

It can be smaller than that, and the terminal must transmit

Among the bits, bits other than the HARQ-ACK information corresponding to the CBG may be determined in an arbitrary manner, and as an example, may be determined according to the seventh embodiment.

may be set differently for each CW, or may be set the same. In the present invention, CW and TB may be used interchangeably.

[Pseudo-code 2]

[start]

[End]

The pseudo-code can be expressed as a flowchart shown in FIGS. 16A and 16B.

When the pseudo-code configures HARQ-ACK of CBGs, the order of grouping is 1) bundling HARQ-ACK information of CBGs in TB, and then 2) HARQ-ACK information of TBs in one slot or mini-slot It is determined in the order of bundling ACK information and then 3) HARQ-ACK information of one cc. Therefore, it will be possible to change and apply the pseudo-code according to this principle.

In order to perform the above embodiments of the present invention, a transmitting unit, a receiving unit, and a processing unit of a terminal and a base station are shown in FIGS. 17 and 18, respectively. In order to perform an operation of determining and receiving control information for partial retransmission from the first embodiment to the seventh embodiment, a transmission and reception method between a base station and a terminal is shown. should operate according to each embodiment.

Specifically, FIG. 17 is a block diagram showing the internal structure of a terminal according to an embodiment of the present invention. As shown in FIG. 17, the terminal of the present invention may include a terminal receiving unit 17-00, a terminal transmitting unit 17-04, and a terminal processing unit 17-02. The terminal receiving unit 17-00 and the terminal transmitting unit 17-04 may be collectively referred to as a transmitting/receiving unit in an embodiment of the present invention. The transmitting/receiving unit may transmit/receive signals with the base station. The signal may include control information and data. To this end, the transceiver may include an RF transmitter for up-converting and amplifying the frequency of a transmitted signal, and an RF receiver for low-noise amplifying a received signal and down-converting its frequency. In addition, the transmitting/receiving unit may receive a signal through a wireless channel, output the signal to the terminal processing unit 17-02, and transmit the signal output from the terminal processing unit 17-02 through the wireless channel. The terminal processing unit 17-02 can control a series of processes so that the terminal can operate according to the above-described embodiment of the present invention. For example, when the terminal receiving unit 17-00 receives a data signal from the base station, it receives the CB group indicator, CB group NDI and data, and the terminal processing unit 17-02 performs deinterleaver according to the number of CBGs and data decoding may be performed according to the CB group indicator and the CB group NDI. Thereafter, the terminal transmitter 17-04 may transmit HARQ-ACK information according to the CB group to the base station.

18 is a block diagram showing the internal structure of a base station according to an embodiment of the present invention. As shown in FIG. 18, the base station of the present invention may include a base station receiving unit 18-01, a base station transmitting unit 18-05, and a base station processing unit 18-03. The base station receiving unit 18-01 and the base station transmitting unit 18-05 may collectively be referred to as transceivers in an embodiment of the present invention. The transmission/reception unit may transmit/receive signals with the terminal. The signal may include control information and data. To this end, the transceiver may include an RF transmitter for up-converting and amplifying the frequency of a transmitted signal, and an RF receiver for low-noise amplifying a received signal and down-converting its frequency. In addition, the transmission/reception unit may receive a signal through a radio channel, output the signal to the base station processing unit 18-03, and transmit the signal output from the terminal processing unit 18-03 through a radio channel. The base station processing unit 18-03 can control a series of processes so that the base station can operate according to the above-described embodiment of the present invention. For example, the base station processing unit 18-03 performs CBG interleaving according to the number of CBGs, sets the number of CBGs to the terminal, determines whether to insert the CB group indicator and CB group NDI, and transmits the CB group indicator to the terminal and It can be controlled to generate CB group NDI information and corresponding data. Thereafter, the base station transmitter 18-05 transmits control information including a CB group indicator and CB group NDI, and the base station receiver 18-01 receives feedback information for each successful CB group.

On the other hand, the embodiments of the present invention disclosed in the present specification and drawings are only presented as specific examples to easily explain the technical content of the present invention and help understanding of the present invention, and are not intended to limit the scope of the present invention. That is, it is obvious to those skilled in the art that other modifications based on the technical idea of the present invention can be implemented. In addition, each of the above embodiments can be operated in combination with each other as needed. For example, a base station and a terminal can be operated by combining parts of the first embodiment and the third embodiment of the present invention. In addition, the above embodiments may be implemented with other modifications based on the technical idea of the above embodiments for LTE systems, 5G, NR systems, and the like.

Claims (15)

In a method for receiving HARQ-ACK (Hybrid Automatic Repeat request-Acknowledgement) information in a wireless communication system,
Transmitting configuration information indicating a first resource and a second resource to a terminal through higher layer signaling;
Transmitting downlink control information for scheduling downlink data to the terminal;
Transmitting the downlink data; and
Receiving the HARQ-ACK information for the downlink data from the terminal,
The downlink data is composed of at least one code block group,
The HARQ-ACK information includes positive confirmation information or negative confirmation information for each of the at least one code block group,
The HARQ-ACK information is received through the second resource when the downlink data includes a plurality of code block groups,
When the HARQ-ACK information indicates that transmission of all of the at least one code block group is successful, the HARQ-ACK information is received through the first resource instead of the second resource,
When the HARQ-ACK information indicates that transmission of all of the at least one code block group has failed, the HARQ-ACK information is received through the first resource instead of the second resource. How to receive information. According to claim 1,
One or more code blocks are interleaved within a code block group to which the one or more code blocks belong. According to claim 1,
The HARQ-ACK information received on the first resource is 1 bit, and the HARQ-ACK information received on the second resource is a number of bits greater than 1 bit. . According to claim 1,
At least one code block included in the at least one code block group is each mapped to an integer number of symbols HARQ-ACK information receiving method. In a method for transmitting HARQ-ACK (Hybrid Automatic Repeat request-Acknowledgement) information in a wireless communication system,
Receiving configuration information indicating a first resource and a second resource from a base station through higher layer signaling;
Receiving downlink control information for scheduling downlink data from the base station;
Receiving the downlink data; and
Transmitting the HARQ-ACK information for the downlink data to the base station,
The downlink data is composed of at least one code block group,
The HARQ-ACK information includes positive confirmation information or negative confirmation information for each of the at least one code block group,
The HARQ-ACK information is transmitted through the second resource when the downlink data includes a plurality of code block groups,
When the HARQ-ACK information indicates that transmission of all of the at least one code block group is successful, the HARQ-ACK information is transmitted through the first resource instead of the second resource,
When the HARQ-ACK information indicates that transmission of all of the at least one code block group has failed, the HARQ-ACK information is transmitted through the first resource instead of the second resource. How information is transmitted. According to claim 5,
One or more code blocks are interleaved within a code block group to which the one or more code blocks belong. According to claim 5,
The HARQ-ACK information transmitted on the first resource is 1 bit, and the HARQ-ACK information transmitted on the second resource is a number of bits greater than 1 bit. . According to claim 5,
At least one code block included in the at least one code block group is each mapped to an integer number of symbols HARQ-ACK information transmission method. In a base station receiving HARQ-ACK (Hybrid Automatic Repeat request-Acknowledgment) information in a wireless communication system,
transceiver; and
Configuration information indicating the first resource and the second resource is transmitted to the terminal through higher layer signaling, downlink control information for scheduling downlink data is transmitted to the terminal, the downlink data is transmitted, and the downlink data is transmitted. A control unit connected to the transmitting and receiving unit for controlling to receive the HARQ-ACK information for link data from the terminal;
The downlink data is composed of at least one code block group,
The HARQ-ACK information includes positive confirmation information or negative confirmation information for each of the at least one code block group,
The HARQ-ACK information is received through the second resource when the downlink data includes a plurality of code block groups,
When the HARQ-ACK information indicates that transmission of all of the at least one code block group is successful, the HARQ-ACK information is received through the first resource instead of the second resource,
When the HARQ-ACK information indicates that transmission of all of the at least one code block group has failed, the HARQ-ACK information is received through the first resource instead of the second resource. According to claim 9,
One or more code blocks are interleaved within a code block group to which the one or more code blocks belong. According to claim 9,
The base station, characterized in that the HARQ-ACK information received on the first resource is 1 bit, and the HARQ-ACK information received on the second resource is more than 1 bit. According to claim 9,
At least one code block included in the at least one code block group is mapped to an integer number of symbols. In a terminal that transmits HARQ-ACK (Hybrid Automatic Repeat request-Acknowledgement) information in a wireless communication system,
transceiver; and
Receives configuration information indicating the first resource and the second resource from the base station through higher layer signaling, receives downlink control information for scheduling downlink data from the base station, receives the downlink data, and A control unit connected to the transceiver unit for controlling transmission of the HARQ-ACK information for link data to the base station;
The downlink data is composed of at least one code block group,
The HARQ-ACK information includes positive confirmation information or negative confirmation information for each of the at least one code block group,
The HARQ-ACK information is transmitted through the second resource when the downlink data includes a plurality of code block groups,
When the HARQ-ACK information indicates that transmission of all of the at least one code block group is successful, the HARQ-ACK information is transmitted through the first resource instead of the second resource,
When the HARQ-ACK information indicates that transmission of all of the at least one code block group has failed, the HARQ-ACK information is transmitted through the first resource instead of the second resource. According to claim 13,
Characterized in that one or more code blocks are interleaved within a code block group to which the one or more code blocks belong. According to claim 13,
At least one code block included in the at least one code block group is each mapped to an integer number of symbols.

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