Methods and apparatus for transmitting / receiving uplink control information in a wireless communication system

Abstract

A method and apparatus for transmitting or receiving uplink control information in a wireless communication system are provided. The method includes: receiving an indicator from a base station indicating whether Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information and configured Granted Uplink Control Information (CG-UCI) should be jointly encoded; identifying overlap between the transmission of HARQ-ACK information and the transmission of a configured Granted-Physical Uplink Shared Channel (CG-PUSCH); performing joint encoding of HARQ-ACK information and CG-UCI when the indicator indicates that HARQ-ACK information and CG-UCI should be jointly encoded; determining the number of modulation symbols for encoding and decoding HARQ-ACK information and CG-UCI based on a beta offset value of HARQ-ACK information; and transmitting uplink data containing HARQ-ACK information and CG-UCI to the base station on the CG-PUSCH based on the determined number of modulation symbols for encoding and decoding.

Description

Technical Field

[0001] This disclosure relates to wireless communication systems. More specifically, this disclosure relates to a method and apparatus for transmitting or receiving uplink control information in a wireless communication system using an unlicensed frequency band. Background Technology

[0002] To meet the increased demand for wireless data traffic since the deployment of fourth-generation (4G) communication systems, efforts have been made to develop improved fifth-generation (5G) or pre-5G communication systems. Therefore, 5G or pre-5G communication systems are also referred to as "super-4G networks" or "post-Long Term Evolution (LTE) systems." 5G communication systems are considered to be implemented in higher frequency (millimeter wave) bands, such as the 60GHz band, to achieve higher data rates. To reduce radio wave propagation loss and increase transmission distance, technologies such as beamforming, massive MIMO, full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive MIMO have been discussed in 5G communication systems. Furthermore, system network improvements are being developed in 5G communication systems based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, coordinated multipoint (CoMP), and receiver interference cancellation. In 5G systems, hybrid frequency shift keying (FSK), quadrature amplitude modulation (QAM) (FQAM), and sliding window superposition coding and decoding (SWSC) have been developed as advanced coding and decoding modulation (ACM), as well as filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as advanced access technologies.

[0003] The internet, a human-centric network of connections where humans generate and consume information, is now evolving into the Internet of Things (IoT), in which distributed entities (such as things) exchange and process information without human intervention. The Internet of Everything (IoE) has emerged, combining IoT technology with cloud server connectivity and big data processing. As IoT implementation requires technological elements such as sensing technology, wired / wireless communication and network infrastructure, service interface technology, and security technology, recent research has focused on sensor networks, machine-to-machine (M2M) communication, and machine-type communication (MTC). Such an IoT environment can provide intelligent internet technology services, creating new value for human life by collecting and analyzing data generated between interconnected things. IoT can be applied to various fields through the integration and combination of existing information technology (IT) with various industrial applications, including smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, healthcare, smart appliances, and advanced medical services.

[0004] Consistent with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, MTC, and M2M communication can be implemented through beamforming, MIMO, and array antennas. Cloud Radio Access Network (RAN), as an application of the aforementioned big data processing technologies, can also be considered an example of the convergence of 5G and IoT technologies.

[0005] A method and device for transmitting services in a 5G communication system using unlicensed spectrum is being researched.

[0006] The above information is provided for background information purposes only to aid in understanding this disclosure. No determination or assertion has been made as to whether any of the above content can be applied to this disclosure as prior art. Summary of the Invention

[0007] Technical issues

[0008] The aspects of this disclosure are intended to at least address the aforementioned problems and / or disadvantages, and to provide at least the following advantages. Therefore, one aspect of this disclosure is to provide a method and apparatus for transmitting or receiving an uplink control channel in a wireless communication system.

[0009] Problem Solution

[0010] According to one aspect of this disclosure, a method performed by a terminal in a communication system is provided. The method includes: receiving an indicator from a base station indicating whether Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information and configured Grant-Uplink Control Information (CG-UCI) are to be jointly encoded; identifying that the transmission of HARQ-ACK information overlaps with the transmission of configured Grant-Physical Uplink Shared Channel (CG-PUSCH); performing joint encoding of HARQ-ACK information and CG-UCI if the indicator indicates that HARQ-ACK information and CG-UCI are to be jointly encoded; determining the number of modulation symbols for encoding and decoding HARQ-ACK information and CG-UCI based on a beta offset value of HARQ-ACK information; and transmitting uplink data with HARQ-ACK information and CG-UCI on the CG-PUSCH to the base station based on the determined number of modulation symbols for encoding and decoding.

[0011] According to another aspect of this disclosure, a method performed by a base station in a communication system is provided. The method includes sending an indicator to a terminal indicating whether Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information and configured Grant-Uplink Control Information (CG-UCI) are to be jointly encoded; identifying overlap between the reception of HARQ-ACK information and the reception of configured Grant-Physical Uplink Shared Channel; receiving uplink data on a CG-PUSCH having HARQ-ACK information and CG-UCI from the terminal if the indicator indicates that HARQ-ACK information and CG-UCI are to be jointly encoded; and obtaining HARQ-ACK information and CG-UCI based on the number of modulation symbols encoded and decoded for HARQ-ACK information and CG-UCI, the number of modulation symbols determined based on a beta offset value of the HARQ-ACK information.

[0012] According to another aspect of this disclosure, a terminal in a communication system is provided. The terminal includes a transceiver and a controller, the controller being coupled to the transceiver and configured to receive an indicator from a base station indicating whether Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information and configured Grant-Uplink Control Information (CG-UCI) should be jointly encoded; to identify overlap between the transmission of HARQ-ACK information and the transmission of configured Grant-Physical Uplink Shared Channel (CG-PUSCH); and, if the indicator indicates that HARQ-ACK information and CG-UCI should be jointly encoded, to perform joint encoding of HARQ-ACK information and CG-UCI; to determine the number of modulation symbols for encoding and decoding HARQ-ACK information and CG-UCI based on a beta offset value of HARQ-ACK information; and, based on the determined number of modulation symbols for encoding and decoding, to transmit uplink data with HARQ-ACK information and CG-UCI to the base station on the CG-PUSCH.

[0013] According to another aspect of this disclosure, a base station in a communication system is provided. The base station includes a transceiver and a controller, the controller being coupled to the transceiver and configured to transmit an indicator to a terminal indicating whether Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information and configured Grant-Uplink Control Information (CG-UCI) should be jointly encoded; identifying overlap between the reception of HARQ-ACK information and the reception of configured Grant-Physical Uplink Shared Channel (CG-PUSCH); and, if the indicator indicates that HARQ-ACK information and CG-UCI should be jointly encoded, receiving uplink data with HARQ-ACK information and CG-UCI on the CG-PUSCH from the terminal, and obtaining HARQ-ACK information and CG-UCI based on the number of modulation symbols encoded and decoded from HARQ-ACK information and CG-UCI, the number of modulation symbols encoded and decoded from HARQ-ACK information and CG-UCI being determined based on a beta offset value of the HARQ-ACK information.

[0014] Another aspect of this disclosure is to provide a method for including uplink control signals in an uplink data channel in a system and node receiving uplink signals and a system and node transmitting downlink signals via an unlicensed frequency band, and a method for configuring or generating uplink control signals for this purpose.

[0015] Additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of the presented embodiments.

[0016] Advantages of the invention

[0017] According to one aspect of this disclosure, in a wireless communication system, the efficiency of receiving uplink control information in a system and node receiving downlink signals or in a system and node transmitting downlink signals can be improved by means of including uplink control information in the uplink data channel.

[0018] Other aspects, advantages, and distinctive features of this disclosure will become apparent to those skilled in the art from the following detailed description of various embodiments disclosed in conjunction with the accompanying drawings. Attached Figure Description

[0019] The above and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:

[0020] Figure 1 This is a diagram illustrating the uplink / downlink time-frequency domain transmission structure in a novel radio (NR) system according to an embodiment of the present disclosure;

[0021] Figure 2 This is a diagram illustrating a channel access process in an unlicensed frequency band according to an embodiment of this disclosure;

[0022] Figure 3 This is a diagram illustrating a resource area and a downlink or uplink scheduling method in an NR system transmitting a data channel in a fifth-generation (5G) communication system according to an embodiment of the present disclosure;

[0023] Figure 4 This is a diagram illustrating the control region configuration of the downlink control channel in an NR according to an embodiment of the present disclosure;

[0024] Figure 5 This is a diagram illustrating the structure of the downlink control channel in an NR according to an embodiment of the present disclosure;

[0025] Figure 6 This is a diagram illustrating the transmission of an uplink signal without uplink scheduling information in an NR according to an embodiment of this disclosure;

[0026] Figure 7 This is a diagram illustrating the multiplexing of uplink control information to uplink data channel in an NR according to an embodiment of the present disclosure;

[0027] Figure 8 This is a diagram illustrating the generation of uplink control information according to an embodiment of this disclosure;

[0028] Figure 9a This is a diagram illustrating the joint encoding of uplink control information according to an embodiment of the present disclosure;

[0029] Figure 9b This is a diagram illustrating the joint encoding of uplink control information according to an embodiment of the present disclosure;

[0030] Figure 10 This is a diagram illustrating the mapping of Authorization-Uplink Control Information (CG-UCI) configured according to an embodiment of this disclosure;

[0031] Figure 11 This is a diagram illustrating the mapping of CG-UCI according to an embodiment of this disclosure;

[0032] Figure 12 This is a diagram illustrating the mapping of CG-UCI according to an embodiment of this disclosure;

[0033] Figure 13 This is a diagram illustrating the mapping of CG-UCI according to an embodiment of this disclosure;

[0034] Figure 14 This is a diagram illustrating the mapping of CG-UCI according to an embodiment of this disclosure;

[0035] Figure 15This is a diagram illustrating the mapping of CG-UCI according to an embodiment of this disclosure;

[0036] Figure 16 This is a diagram illustrating the mapping of CG-UCI according to an embodiment of this disclosure;

[0037] Figure 17 This is a diagram illustrating the mapping of UCI according to an embodiment of this disclosure;

[0038] Figure 18 This is a flowchart illustrating the operation of a base station according to an embodiment of the present disclosure;

[0039] Figure 19 This is a flowchart illustrating the operation of a user equipment (UE) according to an embodiment of the present disclosure;

[0040] Figure 20 This is a block diagram illustrating a base station structure according to an embodiment of the present disclosure; and

[0041] Figure 21 This is a block diagram illustrating the structure of a UE according to an embodiment of the present disclosure.

[0042] In all the accompanying drawings, the same reference numerals are used to denote the same elements. Detailed Implementation

[0043] The following description, taken with reference to the accompanying drawings, is provided to aid in a full understanding of the various embodiments of this disclosure as defined by the claims and their equivalents. It includes various specific details to aid understanding, but these are merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of this disclosure. Furthermore, for clarity and brevity, descriptions of well-known functions and structures may be omitted.

[0044] The terms and words used in the following description and claims are not limited to their bibliographical meaning, but are used solely by the inventors to enable a clear and consistent understanding of this disclosure. Therefore, it will be apparent to those skilled in the art that the following description providing various embodiments of this disclosure is for illustrative purposes only and is not intended to limit the disclosure as defined by the appended claims and their equivalents.

[0045] It should be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly specifies otherwise. Thus, for example, referring to “the surface of a component” includes referring to one or more such surfaces.

[0046] In the following description, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0047] In describing embodiments of this disclosure, descriptions related to techniques well-known in the art and not directly relevant to this disclosure will be omitted. This omission of unnecessary descriptions is intended to prevent obscuring the main ideas of this disclosure and to convey them more clearly.

[0048] For the same reason, some elements may be exaggerated, omitted, or shown schematically in the accompanying drawings. Furthermore, the size of each element does not perfectly reflect its actual size. In the accompanying drawings, identical or corresponding elements have the same reference numerals.

[0049] The advantages and features of this disclosure, as well as the ways in which they are implemented, will become apparent from the embodiments described below in conjunction with the accompanying drawings. However, this disclosure is not limited to the embodiments set forth below, but can be implemented in a variety of different forms. The following embodiments are provided only to fully disclose this disclosure and to inform those skilled in the art of its scope, and this disclosure is limited only by the scope of the appended claims. Throughout the specification, the same or similar reference numerals denote the same or similar elements.

[0050] Here it will be understood that each block of the flowchart illustration, and combinations of blocks in the flowchart illustration, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, special-purpose computer, or other programmable data processing device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing device, create means for implementing the functions specified in the flowchart blocks. These computer program instructions can also be stored in a computer-usable or computer-readable storage medium, which can instruct the computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer-usable or computer-readable storage medium produce an article of writing including instruction means that implement the functions specified in the flowchart blocks. The computer program instructions can also be loaded onto a computer or other programmable data processing device to cause a series of operations to be performed on the computer or other programmable device, thereby producing a computer-implemented process, such that the instructions, which execute on the computer or other programmable device, provide operations for implementing the functions specified in the flowchart blocks.

[0051] Furthermore, each block in the flowchart can represent a module, code segment, or code section, which includes one or more executable instructions for implementing one or more specified logical functions. It should also be noted that in some alternative implementations, the functions mentioned in a block may occur out of order. For example, depending on the functions involved, two blocks shown consecutively may actually execute substantially simultaneously, or these blocks may sometimes execute in reverse order.

[0052] As used herein, "unit" refers to a software element or hardware element, such as a field-programmable gate array (FPGA) or application-specific integrated circuit (ASIC), that performs a predetermined function. However, "unit" does not always have a meaning limited to software or hardware. A "unit" can be configured to be stored in addressable storage media or to execute with one or more processors. Therefore, "unit" includes, for example, software elements, object-oriented software elements, class elements or task elements, procedures, functions, attributes, programs, subroutines, program code segments, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and parameters. Elements and functions provided by a "unit" can be combined into a smaller number of elements or "units," or divided into a larger number of elements or "units." Furthermore, elements and "units" can be implemented as one or more central processing units within a playback device or secure multimedia card. Additionally, a "unit" in the embodiments may include one or more processors.

[0053] Compared to existing 4G systems, 5G systems are considered to support a wider range of services. For example, the most representative services may include enhanced mobile broadband (eMBB) communication services, ultra-reliable and low-latency communication (URLLC) services, massive device-to-device communication (massive machine-type communication (mMTC)) services, and next-generation broadcast services (evolved multimedia broadcast / multicast service (eMBMS)). Systems providing URLLC services can be called URLLC systems, and systems providing eMBB services can be called eMBB systems. The terms "service" and "system" are used interchangeably.

[0054] As mentioned above, a variety of services can be provided to users in a communication system. To provide these services, a method and a device are needed to provide each service to the user based on its characteristics within the same time interval.

[0055] In the context of 5G communication systems, various technologies have been introduced to provide diverse services and support high data rates. These technologies include those capable of retransmission at the block level and those enabling uplink signal transmission without uplink scheduling information. Therefore, when communication devices need to perform 5G communication via unlicensed frequency bands, a more efficient channel access process based on various parameters is necessary.

[0056] Wireless communication systems have evolved from providing early voice-oriented services to broadband wireless communication systems offering high-speed and high-quality packet data services. Examples of such systems include communication standards such as High-Speed ​​Packet Access (HSPA) from the 3rd Generation Partnership Project (3GPP), Long Term Evolution (LTE) or Evolved Universal Terrestrial Radio Access (E-UTRA), LTE-Advanced (LTE-A), High-Speed ​​Packet Data (HRPD) from 3GPP2, Ultra Mobile Broadband (UMB), and IEEE 802.16e. Furthermore, communication standards for 5G or New Radio (NR) have been developed based on fifth-generation wireless communication systems.

[0057] Therefore, in wireless communication systems including 5G, at least one of enhanced mobile broadband (eMBB), massive machine-type communication (mMTC), and ultra-reliable and low-latency communication (URLLC) can be provided to terminals. Services can be provided to the same terminal during the same time interval. In embodiments of this disclosure, eMBB can be a service designed for high-speed transmission of high-capacity data, mMTC can be a service designed to minimize terminal power consumption and access multiple terminals, and URLLC can be a service designed for high reliability and low latency. However, eMBB, mMTC, and URLLC are not limited to these. These three services are likely to be the primary scenarios in LTE systems or systems beyond LTE (such as 5G / New Radio or Next Radio (NR)).

[0058] When a base station schedules data corresponding to eMBB service to a specific terminal within a specific transmission time interval (TTI), if a situation arises where URLLC data should be transmitted within the TTI, the generated URLLC data can be transmitted in the frequency domain where eMBB data has already been scheduled and transmitted, instead of transmitting a portion of the eMBB data in the frequency domain. The UE for which eMBB has been scheduled and the UE for which URLLC has been scheduled can be the same UE or different UEs. In this case, the possibility of corrupted eMBB data increases because a portion of the scheduled and transmitted eMBB data is not transmitted. Therefore, in the above situation, it is necessary to determine a signal processing method and a method for processing signals received from a UE that has been scheduled for eMBB or a UE that has been scheduled for URLLC.

[0059] In the following description, embodiments will be described with reference to the accompanying drawings. In the description of this disclosure, detailed descriptions of relevant functions or configurations will be omitted if it is determined that such detailed descriptions unnecessarily obscure the subject matter of this disclosure. The terminology described below is based on the functional definitions in this disclosure and may vary depending on the intent or use of the user or operator. Therefore, the definitions should be based on the entire specification. In the following, a base station is the entity that performs resource allocation to a terminal and may include at least one of an eNode B, Node B, base station (BS), radio access unit, base station controller, or node on a network. A terminal may include a user equipment (UE), mobile station (MS), cellular phone, smartphone, computer, or multimedia system capable of performing communication functions. In this disclosure, downlink (DL) is the radio transmission path of a signal from a base station to a terminal, and uplink (UL) refers to the radio transmission path of a signal from a terminal to a base station. Although LTE or LTE-A systems may be described as examples below, embodiments can be applied to other communication systems with similar technical backgrounds or channel configurations. For example, fifth-generation mobile communication technologies (5G and New Radio (NR)) developed after LTE-A may be included. Furthermore, as determined by those skilled in the art, the embodiments can be applied to other communication systems with some modifications without departing from the scope of this disclosure.

[0060] As a representative example of a broadband wireless communication system, the NR system employs Orthogonal Frequency Division Multiplexing (OFDM) in the downlink (DL) and both OFDM and Single-Carrier Frequency Division Multiple Access (SC-FDMA) in the uplink (UL). The uplink refers to the radio link through which a terminal (or user equipment (UE)) or mobile station (MS) transmits data or control signals to a base station (BS or eNode B). The downlink refers to the radio link through which the base station transmits data or control signals to the terminal. In this multiple access scheme, generally, each user's data or control information can be distinguished by assigning and operating time-frequency resources, transmitting each user's data or control information on these resources to avoid overlap, i.e., establishing orthogonality.

[0061] The NR system employs a Hybrid Automatic Repeat Request (HARQ) scheme, in which, when decoding failure occurs during the initial transmission, the corresponding data is retransmitted at the physical layer. In the HARQ scheme, when the receiver fails to decode data correctly, it sends a Negative Acknowledgment (NACK) to notify the transmitter of the decoding failure, allowing the transmitter to retransmit the data at the physical layer. The receiver improves data reception performance by combining the retransmitted data with the previously decoded but failed data. Furthermore, when the receiver correctly decodes the data, it can send an acknowledgment (ACK) to the transmitter indicating successful decoding, allowing the transmitter to send new data.

[0062] Figure 1 This is a diagram illustrating the uplink / downlink time-frequency domain structure in an NR system according to an embodiment of the present disclosure.

[0063] refer to Figure 1 The horizontal axis represents the time domain, and the vertical axis represents the frequency domain. The smallest unit of transmission in the time domain is an OFDM or Discrete Fourier Transform (DFT) spread spectrum OFDM symbol, and the N of an OFDM or DFT-s-OFDM symbol... symb 101 symbols are aggregated to form a time slot 102. Here, OFDM symbols are those used when transmitting or receiving signals using an OFDM multiplexing scheme, while DFT-s-OFDM symbols are those used when transmitting or receiving signals using DFT-s-OFDM or SC-FDMA multiplexing. In the following, for ease of explanation, OFDM and DFT-s-OFDM symbols will be used interchangeably as OFDM symbols, and the description will be based on downlink signal transmission / reception. However, this usage can also be applied to uplink signal transmission and reception.

[0064] If the interval between subcarriers is 15kHz, then one time slot is used to form a subframe 103, and the length of each time slot and subframe is 1ms. The number of time slots constituting a subframe 103 and the length of the time slots can vary depending on the interval between subcarriers. For example, when the interval between subcarriers is 30kHz, four time slots can be aggregated to form a subframe 103. In this case, the length of the time slot is 0.5ms, and the length of the subframe is 1ms. Radio frame 104 is the time-domain portion comprising 10 subframes. The smallest transmission unit in the frequency domain is a subcarrier, and the bandwidth of the entire system transmission bandwidth can include a total of N. BW 105 subcarriers. These specific values ​​can be applied variably. For example, in the case of an LTE system, the spacing between subcarriers is 15 kHz, but two time slots are aggregated to form a subframe 103, where the time slot length is 0.5 ms and the subframe length is 1 ms.

[0065] The basic unit of a resource in the time-frequency domain is a resource element (RE) 106, which can be represented by an OFDM symbol index and a subcarrier index. A resource block 107 (RB or Physical Resource Block (PRB)) can be represented by N in the time domain. symb 101 consecutive OFDM symbols and N in the frequency domain SC RB It is defined by 108 consecutive subcarriers. Therefore, one RB 107 in a time slot can include N symb ХN SC RB One RE. Typically, the smallest allocation unit in the frequency domain of data is RB 107. In NR systems, generally, N symb =14, and N SC RB =12, where the number of RBs (N) RB The value can vary depending on the bandwidth of the system's transmission frequency band. In LTE systems, typically, N... symb =7 and N SC RB =12, and N RB It can vary depending on the bandwidth of the system's transmission frequency band.

[0066] In wireless communication systems, such as LTE, LTE-advanced (LTE-A), or 5G New Radio (NR), base stations can be configured to transmit downlink control information (DCI). This DCI includes resource allocation information for the transmission of downlink signals, which are sent by the base station to the UE via a downlink control channel (Physical Downlink Control Channel (PDCCH)). The UE receives at least one downlink signal from the downlink control information (e.g., Channel State Information Reference Signal (CSI-RS)), a broadcast channel (Physical Broadcast Channel (PBCH)), or a downlink data channel (Physical Downlink Shared Channel (PDSCH)). For example, the base station can transmit downlink control information (DCI) to the UE via PDCCH in subframe n, indicating that it will receive PDSCH in subframe n. A UE that has already received the downlink control information (DCI) can then receive PDSCH in subframe n based on the received downlink control information.

[0067] In LTE, LTE-A, or NR systems, the base station can be configured to send downlink control information (DCI) including uplink resource allocation information to the UE via the downlink control channel (PDCCH), and the UE can send at least one uplink signal to the base station, either uplink control information (e.g., sounding reference signal (SRS), uplink control information (UCI), or physical random access channel (PRACH)) or uplink data channel (physical uplink shared channel (PUSCH)). For example, a UE that has received configuration information (or uplink DCI or UL authorization) from the base station for uplink transmission via PDCCH in subframe n can perform uplink data channel transmission (hereinafter referred to as PUSCH transmission) according to a predefined time (e.g., n+4), a time configured via a higher signal (e.g., n+k), or uplink signal transmission time indicator information included in the configuration information for uplink transmission (e.g., n+k).

[0068] Downlink control information can be transmitted within the first N OFDM symbols of a subframe. Typically, N can be {1, 2, and 3}, and the UE can receive a configured number of symbols from the base station, where the downlink control information can be transmitted via a higher signal. Depending on the amount of control information to be transmitted in the current time slot, the base station can change the number of downlink control information symbols that can be transmitted in that time slot for each time slot, and can transmit information about the number of symbols to the UE via a separate downlink control channel.

[0069] In NR or LTE systems, DCI is defined according to various formats, and each format can be used to determine whether the DCI is for uplink data scheduling information (UL grant) or downlink data scheduling information (DL grant), whether the DCI is a compact DCI with small-size control information, whether the DCI control information indicates a back-off DCI, whether spatial multiplexing using multiple antennas is applied, or whether the DCI corresponds to a DCI for power control. For example, a DCI format corresponding to downlink data scheduling control information (DL grant) (e.g., NR DCI format 1_0) may include at least one of the following control information.

[0070] - Control Information Identifier (DCI Format Identifier): An identifier used to identify the received DCI format.

[0071] - Frequency resource allocation (frequency domain resource assignment): Indicates the RBs allocated for data transmission.

[0072] - Time-domain resource allocation (time-domain resource assignment): Indicates the time slots and symbols allocated for data transmission.

[0073] - Virtual Resource Block (VRB) to PRB Mapping: Indicates whether a VRB mapping scheme is applied.

[0074] - Modulation and Codec Scheme (MCS): Indicates the modulation scheme used for data transmission and the size of the transport block as data to be transmitted.

[0075] - New data indicator: Indicates whether the transmission is a HARQ initial transmission or a retransmission.

[0076] - Redundant Version: Indicates a redundant version of HARQ.

[0077] -HARQ process number: Indicates the HARQ process number

[0078] - PDSCH allocation information (downlink assignment index): Indicates to the UE the number of PDSCH reception results to be reported to the base station (e.g., the number of HARQ-ACKs).

[0079] - Transmission Power Control (TPC) Commands for the Physical Uplink Control Channel (PUCCH): Indicates the transmission power control commands for the PUCCH, which serves as the uplink control channel.

[0080] -PUCCH Resource Indicator: Indicates the PUCCH resource used for HARQ-ACK reporting, which includes the reception results of PDSCH based on the corresponding DCI configuration.

[0081] -PUCCH Transmission Timing Indicator (PDSCH-to-HARQ Feedback Timing Indicator): Indicates information about the time slot or symbol in which a PUCCH for HARQ-ACK reporting should be transmitted. This HARQ-ACK report includes the reception result of the PDSCH based on the corresponding DCI configuration.

[0082] DCI can be transmitted via channel coding and modulation processes on the Physical Downlink Control Channel (PDCCH) (or control information, which are used interchangeably below) or the Enhanced PDCCH (EPDCCH) (or enhanced control information, which are used interchangeably below), which is the downlink physical control channel.

[0083] Generally, the DCI is independently scrambled by each UE's specific Radio Network Temporary Identifier (RNTI) (or UE identifier, C-RNTI), with a Cyclic Redundancy Check (CRC) added to it, channel-coded, and then configured into each individual PDCCH for transmission. In the time domain, the PDCCH is mapped and transmitted during control channel transmission. The frequency domain mapping position of the PDCCH can be determined by each UE's identifier (ID) and can be transmitted across the entire system transmission band.

[0084] Downlink data can be transmitted on the Physical Downlink Shared Channel (PDSCH), which is the physical channel used for downlink data transmission. The PDSCH can be transmitted after the control channel transmission interval, and scheduling information in the frequency domain, such as specific mapping positions and modulation schemes, is determined based on the DCI transmitted via the PDCCH.

[0085] The base station informs the UE of the modulation scheme to be applied to the PDSCH to be transmitted and the size of the data to be transmitted (transmission block size (TBS)) via the MCS in the control information constituting the DCI. In embodiments of this disclosure, the MCS may include 5 or more bits, or fewer than 5 bits. The TBS corresponds to the size of the transmission block (TB) before the channel coding for error correction is applied to the data transmission block (TB) to be transmitted by the base station.

[0086] The NR system supports the following modulation schemes: Quadrature Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (QAM), 64QAM, and 256QAM, and each modulation order (Q... m The values ​​are 2, 4, and 6. For example, 2 bits per symbol for QPSK modulation, 4 bits per symbol for 16QAM modulation, 6 bits per symbol for 64QAM modulation, and 8 bits per symbol for 256QAM modulation can be transmitted. Furthermore, depending on system modifications, 256QAM or larger modulation schemes can be used.

[0087] In NR systems, uplink / downlink HARQ employs an asynchronous HARQ scheme, where data retransmission time is not fixed. For example, in the downlink case, when the UE receives HARQ NACK feedback on the initial transmission data sent by the base station, the base station freely determines the transmission time of the retransmitted data through scheduling operations. The UE can buffer data determined to be erroneous based on the decoding result of the HARQ operation on the received data, and then combine the buffered data with the data retransmitted from the base station. HARQ-ACK / NACK information for PDSCH transmitted in subframe nk can be sent from the UE to the base station via PUCCH or PUSCH in subframe n. In 5G communication systems such as NR, the value k can be transmitted simultaneously with the DCI to indicate or schedule the reception of PDSCH transmitted in subframe nk, or it can be configured for the UE via higher-layer signaling. The base station can configure one or more k values ​​via higher-layer signaling and can indicate a specific k value based on the DCI. Here, k can be determined based on the UE's HARQ-ACK processing capability, i.e., the minimum time required for the UE to receive the PDSCH and generate and report the HARQ-ACK for the PDSCH. Before configuring the value of k, the UE can use a default value or a predefined value as the k value.

[0088] Descriptions have been provided based on NR systems to describe wireless communication systems and the methods and apparatus presented in embodiments of this disclosure. However, the scope of this disclosure is not limited to NR systems and can be applied to various radio communication systems such as LTE, LTE-A, LTE-A-Pro, and 5G. This disclosure describes systems and apparatus for transmitting or receiving signals using unlicensed frequency bands, but it can be applied to systems operating in licensed frequency bands.

[0089] In the following, within this disclosure, higher-layer signaling or higher-level signals may correspond to a method for transmitting signals from a base station to a UE using a downlink data channel of the physical layer, or a method for transmitting signals from a UE to a base station using an uplink data channel of the physical layer, wherein the method includes at least one of RRC signaling, PDCP signaling, or a method for transmitting signals via a Media Access Control (MAC) control element (MAC CE). Higher-layer signaling or higher-level signals may include system information, such as a System Information Block (SIB), which is typically sent to multiple UEs.

[0090] In the case of a system that performs communication in an unlicensed frequency band, a transmission device (base station or UE) that transmits signals via the unlicensed frequency band can perform a channel access procedure (or Listen-Before-Speak (LBT)) for the unlicensed frequency band, in which communication is performed before signal transmission, and if the unlicensed frequency band is determined to be free, the transmission device can access the unlicensed frequency band and perform signal transmission according to the channel access procedure. If it is determined according to the performed channel access procedure that the unlicensed frequency band is not free, the transmission device may not be able to perform signal transmission.

[0091] The channel access process in an unlicensed frequency band typically includes: measuring the strength of a signal received via the unlicensed frequency band by a transmission device within a fixed time or time period calculated according to predetermined rules (e.g., a time calculated based on at least one random value selected by a base station or UE); and comparing the measured received signal strength with a predetermined threshold or a threshold calculated according to a function to determine the magnitude of the received signal strength (configured by at least one parameter of the channel bandwidth or signal bandwidth in which the signal to be transmitted is transmitted) and / or the magnitude of the transmission power, thereby determining the idle state of the unlicensed frequency band.

[0092] For example, the transmitting device can measure the signal strength during a period of Xus (e.g., 25us) immediately before the time of signal transmission. If the measured signal strength has a value less than a predetermined or calculated threshold T (e.g., -72dBm), the transmitting device can determine that the unlicensed frequency band is idle and can transmit the configured signal. After the channel access procedure, the maximum time available for continuous signal transmission can be limited according to the maximum channel occupancy time defined for each country, region, and frequency band based on each unlicensed frequency band, and can also be limited according to the type of transmitting device (e.g., base station or UE, or master or slave device). For example, in the case of Japan, in a 5GHz unlicensed frequency band, for an unlicensed frequency band determined to be idle, the base station or UE can perform a channel access procedure and then occupy the channel for up to 4ms without performing an additional channel access procedure and transmitting a signal.

[0093] More specifically, when a base station or UE needs to transmit downlink or uplink signals in an unlicensed frequency band, the channel access procedures that can be performed by the base station or UE can be classified into at least the following types.

[0094] - Type 1: Uplink / downlink signal transmission is performed after a variable time period of the channel access process.

[0095] Type 2: Uplink / downlink signal transmission is performed after a fixed time period following the channel access process.

[0096] Type 3: Performs uplink or downlink signal transmission without performing channel access procedures.

[0097] In the following description, this disclosure will use both the scenario of a base station transmitting downlink signals to a UE via an unlicensed frequency band and the scenario of a UE transmitting uplink signals to a base station via an unlicensed frequency band. However, the content of this disclosure can also be applied in the same manner to the scenario of a UE transmitting uplink signals to a base station via an unlicensed frequency band or a base station transmitting downlink signals to a UE via an unlicensed frequency band, or can be partially modified and applied. Therefore, a detailed description of the transmission or reception of downlink signals will be omitted. In this disclosure, it is assumed that one downlink data message (codeword or TB) or uplink data message is transmitted or received between the base station and the UE. The content of this disclosure can also be applied to the scenario of a base station transmitting downlink signals to multiple UEs, or the scenario of a base station transmitting or receiving multiple codewords or TBs between the base station and the UE.

[0098] A transmission node (hereinafter referred to as a base station or UE) that transmits signals via an unlicensed frequency band can determine the channel access procedure scheme based on the type of signal to be transmitted. For example, when a base station wants to transmit downlink signals including downlink data channels via an unlicensed frequency band, the base station can perform a type 1 channel access procedure. When a base station wants to transmit downlink signals that do not include downlink data channels via an unlicensed frequency band, for example, when the base station wants to transmit synchronization signals or downlink control channels, the base station can perform a type 2 channel access procedure and transmit downlink signals.

[0099] In this context, the channel access procedure scheme can be determined based on the transmission length of the signal to be transmitted via the unlicensed frequency band or the length of the interval or time used to occupy the unlicensed frequency band. Typically, in the Type 1 scheme, the channel access procedure can be performed for a longer time compared to the channel access procedure performed in the Type 2 scheme. Therefore, a Type 2 channel access procedure can be performed when a transmitting node needs to transmit a signal within a short time interval or a period equal to or less than the reference time (e.g., X ms or Y symbols). On the other hand, a Type 1 channel access procedure can be performed when a transmitting node needs to transmit a signal within a long time interval or a period equal to or longer than the reference time (e.g., X ms or Y symbols). In other words, the channel access procedures of different schemes can be performed based on the usage time of the unlicensed frequency band.

[0100] If a transmission node performs a Type 1 channel access procedure according to at least one of the described standards, the transmission node can determine the channel access priority category based on the Quality of Service Category Identifier (QCI) of the signal to be transmitted via the unlicensed frequency band, and can perform the channel access procedure by using at least one of the predefined values ​​for the determined channel access priority category shown in Table 1. For example, QCI 1, 2, and 4 refer to the QCI values ​​of services such as voice, video (live stream), and non-video (buffered stream). When a transmission node wants to transmit a signal to the unlicensed frequency band for a service that does not match the QCI in Table 1, the transmission node can select the service and the QCI closest to the QCI in Table 1, and can select the channel access priority category for this purpose.

[0101] Table 1 shows the mapping relationship between channel access priority category and QCI.

[0102] Table 1

[0103] Channel access priority QCI 1 1,3,5,65,66,69,70 2 2,7 3 4,6,8,9 4 -

[0104] Figure 2 This is a diagram illustrating a channel access process in an unlicensed frequency band according to an embodiment of the present disclosure.

[0105] refer to Figure 2 For example, the delay duration, competition window value, or size set (CW) can be determined based on Table 2. p ), minimum and maximum values ​​of the competition window (CW) min,p CW max,p Maximum available channel usage time (T) mcot,p These are all based on the determined channel access priority (p). In other words, base stations transmitting downlink signals via unlicensed frequency bands will be prioritized in T... f +m p *T sl The channel access procedure is performed on the unlicensed frequency band within the minimum duration. If the base station is to perform a channel access procedure with a channel access priority category of 3 (p=3), then m is used. p =3 to configure the size of the delay duration required to perform the channel access procedure ((T) f +m p *T sl If the unlicensed frequency band is determined to be in all m p *T sl If the time is idle, then N = N-1 can be true. Specifically, at the point in time during the channel access process, N222 can be chosen as 0 and the contention window value (CW). p Any integer value between ) . In the case of channel access priority category 3, the minimum contention window value and the maximum contention window value are 15 and 63, respectively. If the unlicensed frequency band is determined to be idle during the delay duration and the duration of performing the additional channel access procedure, the base station can T mcot,p Signals are transmitted via an unlicensed frequency band during a time period (8ms). Table 2 is a table showing the channel access priority categories in the downlink. In this disclosure, for ease of description, the downlink channel access priority categories will be used to provide the description. However, in the case of the uplink, the channel access priority categories in Table 2 may be reused, or channel access priority categories for uplink transmission may be defined and used.

[0106] Table 2

[0107]

[0108] Initial competition window value (CW) p ) is the minimum value of the competition window (CW) min,p A base station that has already selected value N can operate within time interval T. sl The channel access procedure is performed in 220, and when via time interval T sl When the channel access procedure performed in the process determines that the unlicensed frequency band is free, this value is changed to N = N-1, and when N = 0, signals can be transmitted via the unlicensed frequency band up to T.mcot,p Time period. If via T sl If the time-based channel access process determines that there are no unlicensed frequency bands available, the base station can re-execute the channel access process without changing the N value.

[0109] Competition window value (CW) p The CW can be changed at the time the base station initiates the channel access procedure, at the time the base station selects a value N to perform the channel connection procedure, or immediately before that, based on the reception results of the downlink data channel transmitted in the reference time slot or reference subframe during the most recent transmission period (or MCOT) (where the downlink signal has already been transmitted via an unlicensed frequency band). In other words, the base station can receive reports on the reception results of the downlink data transmitted by the UE in the reference subframe or reference time slot, and can increase or decrease the CW based on the NACK ratio (Z) in the received reception results. p Size.

[0110] refer to Figure 2 At time 270 when the base station initiates channel access procedure 202, at time 222 when the base station selects value N222 to execute the channel access procedure, or immediately before that, the first transmission period 240 of the most recent transmission period 230 (where the downlink signal has been transmitted via the unlicensed frequency band) becomes the contention window for channel access procedure 270, changing the reference time slot. If the base station cannot receive a report of the reception result of the downlink data channel transmitted in the first time slot 240 of transmission period 230 (hereinafter referred to as a time slot or subframe) (e.g., if the time interval between the first subframe and the time 270 when the base station initiates the channel access procedure is equal to or less than n time slot subframes, in other words, if the base station initiates the channel access procedure before the time when the UE can report the reception result of the downlink data channel in the first subframe 240), then the first subframe of the most recent transmission period before downlink signal transmission period 230 (where the downlink signal has been transmitted) becomes the reference subframe.

[0111] In other words, if the base station cannot receive the downlink data transmitted in reference subframe 240 from the UE at the time point 270 when the base station initiates the channel access procedure, the time point of selecting value N, or immediately preceding it, the base station can determine the first subframe of the most recent transmission period (where the downlink signal has already been transmitted) from the downlink data channel reception results received from the UE as the reference subframe. The base station can determine the size of the contention window for channel access procedure 270 by using the downlink data reception results received from the UE regarding the downlink data transmitted via the downlink data channel in the reference subframe.

[0112] For example, according to channel access priority category 3 (p=3) via channel access procedure (e.g., CW) p =15) A base station that has transmitted downlink signals can change its contention window from the default value (CW) to the default value. p =15) Increase to the next competition window value (CW) p =31), if, in the downlink signals transmitted via the unlicensed frequency band, 80% or more of the downlink data transmitted to the UE via the downlink data channel in the first subframe is determined to be NACK.

[0113] If 80% or more of the reception results are not determined to be NACK 200, the base station can either maintain the existing value as the contention window value or change the contention window value to the default value. In this case, the change in the contention window can generally be applied to all channel access priority categories, or it can be applied only to the channel access priority category used for the channel access procedure. A method for determining a reception result that is effective in determining a change in the size of the contention window is provided, determined from the reception result of downlink data transmitted or reported to the base station by the UE for downlink data transmitted via the downlink data channel in a reference subframe or reference time slot, wherein the change in the contention window size is determined; in other words, the method for determining the value Z is as follows.

[0114] If a base station transmits one or more codewords or TBs to one or more UEs in a reference subframe or reference time slot, the base station can determine the Z value based on the ratio of NACKs in the reception results sent or reported by the UE for the TBs received in the reference subframe or reference time slot. For example, when two codewords and two TBs are transmitted to a UE in a reference subframe or reference time slot, the UE can transmit or report the reception results of the downlink data signals for these two TBs to the base station. If the NACK ratio Z in the two reception results is equal to or greater than a predefined or configured threshold between the base station and the UE (e.g., Z = 80%), the base station can change or increase the size of the contention window.

[0115] If the UE bundles the reception results of downlink data including one or more subframes (e.g., M subframes) that include a reference subframe or time slot, and sends or reports the bundled reception results to the base station, the base station can determine that the UE has sent M reception results. Furthermore, the base station can determine the value Z based on the NACK ratio among the M reception results, and can change, maintain, or initialize the size of the contention window.

[0116] If the reference subframe corresponds to the second of two time slots that constitute a subframe, the value Z can be determined based on the NACK ratio in the reception results sent or reported by the UE to the base station for downlink data received in the reference subframe (i.e., the second time slot) and subsequent subframes.

[0117] Furthermore, if the scheduling information or downlink control information of the downlink data channel transmitted by the base station is transmitted in the same cell or frequency band as the cell or frequency band of the downlink data channel, or if the scheduling information or downlink control information of the downlink data channel transmitted by the base station is transmitted via an unlicensed frequency band but in a cell or frequency band different from the cell or frequency band of the downlink data channel, if it is determined that the UE did not transmit the reception result of the downlink data received in the reference subframe or reference time slot, and if a specific reception result in the reception result of the downlink data transmitted by the UE is determined to be DTX (indicating a state of no PDSCH reception), NACK / DTX, or any state, the base station can determine the value Z by determining that the specific reception result of the UE is NACK.

[0118] Furthermore, when the downlink data channel scheduling information or downlink control information transmitted by the base station is transmitted via a licensed frequency band, if a specific reception result of the downlink data received by the UE is determined to be DTX, NACK / DTX, or any other state, the base station may not include the UE's specific reception result in the reference value Z for the contention window change. In other words, the base station can determine the value Z while ignoring the UE's reception result.

[0119] When the base station transmits scheduling information or downlink control information for the downlink data channel via the licensed frequency band, if the UE does not actually transmit downlink data (no transmission), as indicated in the downlink data reception result of the reference subframe or reference time slot transmitted or reported by the UE to the base station, the base station can determine the value Z of the downlink data while ignoring the reception result transmitted or reported by the UE.

[0120] In 5G systems, the framework architecture needs to be flexibly defined and operated by considering various services and requirements. For example, each service can be considered to have a different subcarrier spacing according to requirements. Current 5G communication systems support multiple subcarrier spacings, and the subcarrier spacing can be determined using the following equation.

[0121] Δf=f02 m

[0122] Here, f0 represents the basic subcarrier spacing of the system, and m represents an integer scaling factor. For example, if we assume f0 is 15 kHz, the set of subcarrier spacings that a 5G communication system can have may include 3.75 kHz, 7.5 kHz, 15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz, 480 kHz, etc. The available set of subcarrier spacings may vary depending on the frequency band. For example, 3.75 kHz, 7.5 kHz, 15 kHz, 30 kHz, and 60 kHz can be used in frequency bands below 6 GHz, while 60 kHz, 120 kHz, and 240 kHz can be used in frequency bands above 6 GHz.

[0123] The length of an OFDM symbol can vary depending on the subcarrier spacing that makes up the OFDM symbol. This is because, based on the characteristics of OFDM symbols, the subcarrier spacing and the length of the OFDM symbol have an inverse relationship. For example, if the subcarrier spacing is doubled, the symbol length is halved; conversely, if the subcarrier spacing is reduced to half, the symbol length is doubled.

[0124] The resource areas for transmitting data channels in a 5G communication system will be described below.

[0125] Figure 3 This is a diagram illustrating a resource area and a downlink or uplink scheduling method in an NR system that transmits data channels in a 5G communication system according to an embodiment of the present disclosure.

[0126] refer to Figure 3 The UE can monitor and / or search for PDCCH 310 in a downlink control channel (hereinafter referred to as PDCCH) region (hereinafter referred to as control resource set (CORESET) or search space (SS)) configured via a higher signal from the base station. The downlink control channel region may include information 314 regarding the time domain and information 312 regarding the frequency domain, and the time domain information 314 may be configured in units of symbols and the frequency region information 312 may be configured in units of RBs or RB groups. If the UE detects PDCCH 310 in time slot i 300, the UE can acquire downlink control information (DCI) transmitted via the detected PDCCH 310. Based on the received downlink control information (DCI), the UE can acquire scheduling information for the downlink data channel or the uplink data channel. In other words, DCI may include at least information about the resource area (or PDSCH transmission area) from which the UE should receive downlink data channels (hereinafter referred to as PDSCH) from the base station, or information about the resource area allocated by the base station to the UE for uplink data channel (PUSCH) transmission.

[0127] The following describes the scheduling of a UE for uplink data channel (PUSCH) transmission. A UE that has already received a DCI can obtain the offset information K or slot index for PUSCH reception based on the DCI, and can determine the PUSCH transmission slot index. For example, based on the received PDCCH slot index i 300, the UE can determine that it is scheduled to transmit PUSCH in slot i+K 305 via the received offset information K. Based on the received PDCCH 310 CORESET, the UE can also determine the PUSCH start symbol or time in slot i+K 305 or slot i+K via the received offset information K.

[0128] The UE can obtain information related to the PUSCH transmission time-frequency resource area 340 in the PUSCH transmission slot 305 from the DCI. The PUSCH transmission frequency resource area information can be group element information of the PRB or the PRB itself. The frequency resource 330 indicated by the PUSCH transmission frequency resource area information is an area included in the initial uplink bandwidth (BW) 335 or initial uplink bandwidth portion (BWP) determined or configured by the UE via the initial access procedure. If the UE is configured with an uplink bandwidth (BW) 335 or uplink bandwidth portion (BWP) via a higher signal, then the frequency resource 330 indicated by the PUSCH transmission frequency resource area information is an area included in the uplink bandwidth (BW) 335 or uplink bandwidth portion (BWP) configured via a higher signal.

[0129] PUSCH transmission time resource area information 325 can be symbol or symbol group unit information, or it can be information indicating absolute time information. PUSCH transmission time resource area information 325 can be represented by a combination of PUSCH transmission start time or symbol and PUSCH length or PUSCH end time or symbol, and can be included in the DCI as a field or value. PUSCH transmission time resource area information 325 can be included in the DCI as a field or value representing each of the PUSCH transmission start time or symbol and PUSCH length or PUSCH end time or symbol. The UE can transmit PUSCH within the PUSCH transmission resource area 340 determined based on the DCI.

[0130] The downlink control channel in a 5G communication system will be described below with reference to the accompanying drawings.

[0131] Figure 4 This is a diagram illustrating the control region configuration of the downlink control channel in NR control according to an embodiment of the present disclosure. Furthermore, a control resource set (CORESET) for transmitting the downlink control channel is shown in the 5G wireless communication system.

[0132] refer to Figure 4 An example is shown where the UE's bandwidth portion 410 is configured on the frequency axis, and a timeslot 420 with two control regions (control region #1 401 and control region #2 402) is configured on the time axis. Control regions 401 and 402 can be configured for specific frequency resources 403 within the entire UE bandwidth portion 410 on the frequency axis. One or more OFDM symbols can be configured on the time axis, which can be defined as the duration 404 of the control resource set. (Reference) Figure 4 Control region #1 401 is configured to have a control region length of 2 symbols, and control region #2 402 is configured to have a control region length of 1 symbol.

[0133] In the aforementioned 5G system, the control region can be configured to the UE by the base station via higher-level signaling (e.g., system information, Master Information Block (MIB), and Radio Resource Control (RRC) signaling). Configuring the control region to the UE involves providing information such as the control region's identifier (identity), frequency location, and symbol length. For example, this information may include the following.

[0134] Table 3

[0135]

[0136]

[0137] In Table 3, the TCI-StatesPDCCH (TCI State for short) configuration information may include information on one or more Synchronization Signal (SS) / Physical Broadcast Channel (PBCH) block indices or Channel State Information Reference Signal (CSI-RS) indices, which have a quasi-synchronous position (QCL) relationship with the Demodulation Reference Signal (DMRS) transmitted in the corresponding control area. Furthermore, the frequencyDomainResources configuration information configures the frequency resources of the corresponding CORESET via a bitmap. Here, each bit indicates a group of 6 non-overlapping PRBs. The first group refers to a group consisting of 6 PRBs, whose first PRB index is... in Represents the starting point of the BWP. The most significant bit of the bitmap indicates the first group and is configured in ascending order.

[0138] Figure 5 This is a diagram illustrating the structure of the downlink control channel in an NR according to an embodiment of the present disclosure.

[0139] refer to Figure 5The basic unit constituting the time and frequency resources of the control channel is called a resource element group (REG) 503, and a REG 503 can be defined as having one OFDM symbol 501 on the time axis and one physical resource block (PRB) 502 on the frequency axis, i.e., 12 subcarriers. Downlink control channel allocation units can be configured by cascading REGs 503.

[0140] refer to Figure 5 When the basic unit used to allocate downlink control channels in a 5G system is a control channel element (CCE) 504, one CCE 504 can include multiple REG 503s. Figure 4 Taking REG 503 as an example, REG 503 can include 12 REs. If one CCE 504 includes 6 REG 503s, then one CCE 504 can include 72 REs. When configuring a downlink control area, the area can include multiple CCE 504s, and a specific downlink control channel can be mapped to one or more CCE 504s and transmitted according to the aggregation level (AL) within the control area. The CCE 504s in the control area are classified by numbers, and these numbers can be assigned according to a logical mapping scheme.

[0141] Figure 5 The basic unit of the downlink control channel shown, REG 503, can include the RE mapped to by the DCI and the region mapped to by the demodulation reference signal (DMRS) 505, which is the reference signal used to decode the RE. Figure 5 As shown, three DMRS 505s can be sent from one register 503.

[0142] Depending on the aggregation level (AL), the number of CCEs required to transmit the PDCCH can be 1, 2, 4, 8, or 16, and different numbers of CCEs can be used to implement link adaptation of the downlink control channel. For example, if AL = L, then a downlink control channel can be transmitted via L CCEs. The UE needs to detect the signal without knowing the information on the downlink control channel, and a search space representing the set of CCEs is used to assist in this blind decoding. The search space is the set of downlink control channel candidates that include CCEs, which the UE should attempt to decode at a given aggregation level. Since there are aggregation levels that allow a search space to be bundled with 1, 2, 4, 8, or 16 CCEs, the UE has multiple search spaces. The set of search spaces can be defined as the set of search spaces across all aggregation levels.

[0143] Search spaces can be categorized into common search spaces and UE-specific search spaces. To receive common control information, such as paging messages or dynamic scheduling of system information, a group of UEs or all UEs can check the common search space of the PDCCH. For example, PDSCH scheduling allocation information for transmitting SIBs, including cell operator information, can be received by checking the common search space of the PDCCH. In the case of a common search space, a specific group of UEs or all UEs need to receive the PDCCH and can therefore be defined as a predetermined set of CCEs. UE-specific search spaces can be used to receive scheduling allocation information for UE-specific PDSCHs or PUSCHs. UE-specific search spaces can be defined based on UE identity and the functionality of various system parameters.

[0144] In 5G systems, parameters for the PDCCH search space can be configured from the base station to the UE via higher-layer signaling (e.g., SIB, MIB, and RRC signaling). For example, the base station can configure the UE with the number of PDCCH candidates at each aggregation level L, the monitoring period of the search space, the monitoring timing of each symbol in the search space's time slots, the search space type (public search space or UE-specific search space), the combination of RNTI and DCI formats to be monitored in the search space, and the control area index used to monitor the search space. For example, the following information may be included.

[0145] Table 4

[0146]

[0147]

[0148] Based on the configuration information, the base station can configure one or more search space sets for the UE. For example, the base station can configure search space set 1 and search space set 2 to the UE, configure DCI format A scrambled with X-RNTI in search space set 1 to be monitored in a common search space, and configure DCI format B scrambled with Y-RNTI in search space set 2 to be monitored in a UE-specific search space.

[0149] Depending on the configuration information, one or more search space sets may exist within the public search space or the UE-specific search space. For example, search space set #1 and search space set #2 may be configured as a public search space, and search space set #3 and search space set #4 may be configured as UE-specific search spaces.

[0150] In the public search space, the following combinations of DCI formats and RNTI can be monitored.

[0151] -DCI format 0_0 / 1_0, with CRC scrambled by C-RNTI, CS-RNTI, SP-CSI-RNTI, RA-RNTI, TC-RNTI, P-RNTI, SI-RNTI;

[0152] -DCI format 2_0, with CRC scrambled by SFI-RNTI;

[0153] - DCI format 2_1, with CRC scrambled by INT-RNTI;

[0154] -DCI format 2_2, with CRC scrambled by TPC-PUSCH-RNTI and TPC-PUSCH-RNTI;

[0155] -DCI format 2_3, with CRC scrambled by TPC-SRS-RNTI.

[0156] In the UE-specific search space, the following combinations of DCI formats and RNTI can be monitored.

[0157] - DCI format 0_0 / 1_0, with CRC scrambled by C-RNTI, CS-RNTI, TC-RNTI;

[0158] - DCI format 1_0 / 1_1, with CRC scrambled by C-RNTI, CS-RNTI, TC-RNTI.

[0159] The above RNTIs can be defined and used as follows.

[0160] - Cell RNTI (C-RNTI): Used for UE-specific PDSCH scheduling;

[0161] - Temporary Cell RNT (TC-RNTI): Used for UE-specific PDSCH scheduling;

[0162] -Configured Scheduling RNTI (CS-RNTI): UE-specific PDSCH scheduling for semi-static configuration;

[0163] - Random Access RNTI (RA-RNTI): Used for PDSCH scheduling in random access operations;

[0164] - Paging RNTI (P-RNTI): Used to schedule PDSCHs that send paging requests via it;

[0165] -System Information RNTI (SI-RNTI): Used to schedule PDSCHs that send system information via it;

[0166] - Interrupt RNTI (INT-RNTI): Used to notify the PDSCH whether it has been punctured;

[0167] -PUSCH RNTI Transmission Power Control (TPC-PUSCH-RNTI): Used to indicate power control commands for PUSCH;

[0168] - PUCCH RNTI Transmission Power Control (TPC-PUCCH-RNTI): Used to indicate power control commands for the PUCCH;

[0169] - Transmission Power Control of SRS RNTI (TPC-SRS-RNTI): Used to indicate the power control command of SRS.

[0170] In a 5G system, multiple search space sets can be configured with different parameters (e.g., DCI format), so the set of search spaces monitored by the UE at each point in time can vary. For example, if search space set #1 is configured for time slot X and search space set #2 is configured for time slot Y, where X and Y are different, the UE can monitor search space set #1 and search space set #2 in a specific time slot, and can monitor only one of search space set #1 and search space set #2 in another specific time slot.

[0171] When multiple search space sets are configured in the UE, the following conditions can be considered when determining the search space set that the UE should monitor.

[0172] Condition 1: Limit the maximum number of PDCCH candidates.

[0173] The number of PDCCH candidates that can be monitored in each time slot does not exceed M. μ M μ It can be configured as 15.2 μ The maximum number of PDCCH candidate groups per slot in a cell with a subcarrier spacing of kHz is defined, and can be defined by the following table.

[0174] Table 5

[0175]

[0176]

[0177] Condition 2: Limit the maximum number of CCEs

[0178] The number of CCEs in each time slot that constitutes the entire search space (here, the entire search space refers to the entire CCE set corresponding to the union region of multiple search space sets) does not exceed C. μ C μ It can be configured as 15.2μ The maximum number of CCEs per time slot in a cell with a kHz subcarrier spacing is defined and can be defined in the table below.

[0179] Table 6

[0180]

[0181] For ease of description, the situation where both conditions 1 and 2 are satisfied at a specific point in time is defined as "condition A". Therefore, not satisfying condition A can mean not satisfying at least one of conditions 1 and 2 above.

[0182] Depending on the configuration of the base station's search space set, there may be situations where the above conditions are not met at a specific time point. If condition A is not met at a specific time point, the UE can select and monitor only some of the search space sets configured to meet condition A at that time point, and the base station can send PDCCH to the selected search space set.

[0183] The following methods can be used to select some search spaces within the overall search space set of the configuration.

[0184] Method 1

[0185] If condition A for PDCCH is not met at a specific time point (time slot), the UE (or base station) may prioritize the search space type being configured as a UE search space set from the search space sets existing at the corresponding time point, and select the search space set whose search space type is configured as a common search space.

[0186] If all search space sets configured to have a common search space are selected (i.e., if condition A is satisfied even after selecting all search spaces configured as a common search space), then the UE (or base station) can choose to be configured with a search space set specific to its UE search space. If multiple search space sets are configured to have a UE-specific search space, the search space set with the lower search space set index can have a higher priority. Based on the priority, a UE-specific search space set can be selected within the range that condition A is satisfied.

[0187] In NR systems, base stations have a CSI framework for instructing the measurement and reporting of Channel State Information (CSI) to the UE. The NR CSI framework may include at least two elements: resource settings and reporting settings, where the reporting settings can be linked to the resource settings by referencing at least one ID of the resource settings. The base station may instruct the UE to report channel state information via higher-level signaling, including Radio Resource Control (RRC) signaling or Media Access Control (MAC) control element signaling, or via L1 signaling (e.g., common DCI, group common DCI, and UE-specific DCI).

[0188] For example, a base station can indicate aperiodic Channel Information Reporting (CSI reporting) to the UE via higher-level signaling or DCI using DCI format 0_1. As another example, a base station can indicate semi-persistent CSI reporting via higher-level signaling or DCI using DCI format 0_1. The base station can activate or deactivate semi-persistent CSI reporting via higher-level signaling, including MAC CE signaling or DCI scrambled with SP-CSI-RNTI. When semi-persistent CSI reporting is activated, the UE can periodically report channel information according to the configured time slot interval. When semi-persistent CSI reporting is deactivated, the UE can stop the already activated periodic channel information reporting. As another example, a base station can indicate periodic CSI reporting to the UE via higher-level signaling. The base station can activate or deactivate periodic CSI reporting via higher-level signaling, including RRC signaling. When periodic CSI reporting is activated, the UE can periodically report channel information according to the configured time slot interval. When periodic CSI reporting is disabled, the UE can stop periodic CSI reporting that has already been activated.

[0189] In the context of NR communication systems, to provide various services and support high data rates, uplink signaling (configured licensed PUSCH or CG-PUSCH) can be transmitted without uplink scheduling information. More specifically, when uplink signaling is to be transmitted without uplink scheduling information, configuration information, such as the MCS and resource allocation for uplink transmission, can be configured via DCI or RRC signaling of the PDCCH, and the uplink transmissions that can be performed can be described by classifying them into at least the following types according to the uplink transmission configuration reception scheme.

[0190] - Type 1: Uplink transmission configuration using RRC signaling

[0191] Type 2: Uplink transmission configuration using the physical layer's uplink data channel

[0192] Figure 6This is a diagram illustrating the transmission of an uplink signal without uplink scheduling information in an NR according to an embodiment of the present disclosure.

[0193] refer to Figure 6 In an unlicensed frequency band, a channel access procedure is performed to transmit uplink signals without uplink scheduling information. When a UE accesses an unlicensed frequency band via a variable-time channel access procedure, the UE can schedule downlink transmission in the last time slot 604 or the last subframe 604 within the maximum channel occupancy time 612 via the channel occupancy time sharing indicator in uplink control information 605. The base station determines whether to access the channel by performing a fixed-time channel access procedure, and the UE configures the last symbol of subframe 608 or time slot 608 used for uplink transmission as a gap interval, which is empty for the base station's channel access procedure. When transmitting CG-PUSCH in an unlicensed frequency band, the UE can add CG uplink control information (CG-UCI) including HARQ ID, RV, and CG-PUSCH scheduling information to the CG-PUSCH and transmit the CG-PUSCH, where all CG-PUSCHs may include at least one CG-UCI.

[0194] In NR communication systems, if the uplink control channel overlaps with the uplink data channel and meets transmission time conditions, or if there is an indication to transmit uplink control information to the uplink data channel via L1 signaling or higher signaling, then the uplink control information can be included in the uplink data channel for transmission. HARQ-ACK, CSI part 1, CSI part 2, and three uplink control messages can be transmitted via the uplink data channel, and each uplink control message can be mapped to a PUSCH according to predetermined multiplexing rules.

[0195] More specifically, if the number of HARQ-ACK information bits to be included in PUSCH 606, 607, and 608 in the first operation is 2 bits or less, the UE reserves REs in advance to send the HARQ-ACK information. The method for determining the reserved resources is the same as in the second operation. In the second operation, if the number of HARQ-ACK information bits to be sent by the UE is greater than 2 bits, the UE can map the HARQ-ACK information from the first OFDM symbol excluding the DMRS to after the first DMRS symbol of PUSCH 606, 607, and 608. In the third operation, the UE can map CSI Part 1 to the PUSCH. CSI Part 1 can be mapped from the first OFDM symbol of the PUSCH instead of from the DMRS, and can be excluded from mapping to the REs reserved in the first operation and the REs to which the HARQ-ACK is mapped in the second operation.

[0196] In the fourth operation, the UE can map CSI Part 2 to the PUSCH. CSI Part 2 can be mapped from the first OFDM symbol of the PUSCH instead of from the DMRS, and it can be omitted from mapping to the RE containing CSI Part 1 and the RE containing the HARQ-ACK mapped in the second operation. In the fifth operation, if the HARQ-ACK is less than 2 bits, the UE can puncture the HARQ-ACK and map it to the RE reserved in the first operation. If the number of uplink control information bits (or modulation symbols) to be mapped to the PUSCH is greater than the number of uplink control information bits (or REs) that can be mapped to the corresponding OFDM symbol, the frequency axis RE spacing d between the modulation symbols of the uplink control information to be mapped can be configured such that d = 1. If the number of uplink control information bits (or modulation symbols) to be mapped from the UE to the PUSCH is less than the number of uplink control information bits (or REs) that can be mapped to the corresponding OFDM symbols, then the frequency axis spacing d between the modulation symbols of the uplink control information to be mapped can be configured such that d = floor(l - available bits # on the OFDM symbol / l - unmapped UCI bits # at the beginning of the OFDM symbol).

[0197] Figure 7 This diagram illustrates how uplink control information is multiplexed into the uplink data channel in an NR according to embodiments of this disclosure. Furthermore, Figure 7 An example of mapping uplink control information to PUSCH is shown.

[0198] refer to Figure 7 Assume the number of HARQ-ACK symbols to be mapped to the PUSCH is 5, and a resource block is configured or scheduled to the PUSCH. First, as shown in (a) 750, the UE can map a HARQ-ACK 701 with five symbols from the lowest RE index (or highest RE index) of the first OFDM symbol 704 excluding the DMRS, after the first DMRS 700 at d = floor(12 / 5) = 2 intervals on the frequency axis. Next, as shown in (b) 760, the UE can map CSI part 1 702 from the first OFDM symbol 705 instead of the DMRS. Finally, as... Figure 7 As shown in (c)770, the UE can map CSI part 2 703 to CSI part 1 702 and REs that HARQ-ACK does not map from the first OFDM symbol 706 that does not include DMRS.

[0199] When HARQ-ACK is transmitted on PUSCH (or CG-PUSCH), the number of modulation symbols encoded and decoded can be determined by the following equation.

[0200] [Equation 1]

[0201]

[0202] Here, O ACK This indicates the number of bits in the HARQ-ACK payload, while L ACK Indicates the number of CRC bits. K r It is the size of the r-th code block, and This represents the number of subcarriers in each OFDM symbol that can be used for UCI transmission in a PUSCH configured or scheduled by the base station. α and It is a value configured by the base station and is determined via higher signaling or L1 signaling.

[0203] More specifically, The beta offset value is defined as the value used to determine the amount of resources when HARQ-ACK information is multiplexed with other UCI information and sent to PUSCH (or CG-PUSCH). If there is no backoff DCI (or DCI format 0_0) or non-backoff DCI (or DCI format 0_1) indication for PUSCH transmission in the beta_offset indicator field, and the UE is configured with the beta offset value configured as "semi-static" as a higher-layer configuration, then the UE can configure a beta offset value for a higher-layer configuration. In this case, the beta offset can have values ​​according to Table 7, with the index of the corresponding value indicating a higher-layer configuration, and depending on the number of bits in the HARQ-ACK information: for HARQ-ACK information bits of 2 or less, HARQ-ACK information bits greater than 2 and equal to or less than 11, and HARQ-ACK information bits greater than 11... and The indices can correspond to the beta offset values ​​respectively. The beta offset values ​​for CSI Part 1 and CSI Part 2 can also be configured in the same way.

[0204] Table 7

[0205]

[0206]

[0207] If the base station schedules PUSCH transmissions for the UE using a non-back-off DCI (or DCI format 0_1), and the non-back-off DCI has a beta offset indicator field, i.e., if the beta offset value is configured as "dynamic" as a higher configuration, then in the case of HARQ-ACK, as shown in Table 8, by using the beta offset indicator field included in the non-back-off DCI, for UEs with or The four sets of configuration beta offset values ​​are configured, and beta offset values ​​are configured for the UE, indicating the beta offset values ​​to be used during HARQ-ACK multiplexing. As in the method described above, each index is determined based on the number of bits in the HARQ-ACK information. For example, based on the number of bits in the HARQ-ACK information, the following conditions are considered: 2 or fewer bits in the HARQ-ACK information; greater than 2 bits and equal to or less than 11 bits in the HARQ-ACK information; and greater than 11 bits in the HARQ-ACK information. and The index can correspond to the beta offset value. and The set can be indicated in the same way.

[0208] Table 8

[0209]

[0210] Meanwhile, if the three existing UCIs mentioned above are included in the CG-PUSCH configured in the unlicensed frequency band for transmission, a total of four UCIs (CG-UCI, HARQ-ACK, CSI Part 1, and CSI Part 2) can be configured or scheduled in the CG-PUSCH. However, in NR systems, up to three uplink control information messages can be included in the uplink data channel for transmission. Therefore, a method is needed to generate or select three UCIs from the CG-UCI and the three existing UCIs (HARQ-ACK, CSI Part 1, and CSI Part 2) and add the generated or selected UCIs to the CG-PUSCH for transmission.

[0211] This disclosure provides a method for a UE to transmit uplink control information, specifically for a base station and a UE configured to receive or transmit downlink or uplink signals in an unlicensed frequency band. More specifically, this disclosure provides a method and apparatus in which the UE configures or adjusts (or modifies) uplink control information to be transmitted via an uplink data channel based on information configured or scheduled from the base station, in order to add the uplink control information to the uplink data channel.

[0212] In the following description, the methods and apparatus presented in the embodiments are not limited to or applicable to each embodiment of this disclosure, and can be used for transmitting or adjusting uplink control information by using all or some combinations of one or more embodiments presented in this disclosure. Examples of embodiments can be used to describe situations where, as shown in semi-persistent scheduling (SPS) or configured licensed transmission, the UE is configured with PUSCH transmission from the base station via a high-signal configuration and performs PUSCH transmission even without receiving DCI. However, these embodiments are applicable even when the base station schedules the UE to receive or transmit packet data channels based on DCI. Furthermore, these embodiments are also applicable to situations where uplink control information is transmitted in broadband systems, such as broadband unlicensed band transmission based on subbands or multi-carrier or carrier aggregation transmission. In the embodiments of this disclosure, it will be described assuming that the base station and UE operate in unlicensed bands. However, the methods and apparatus presented in the embodiments are also applicable to base stations and UEs operating in licensed bands, shared bands (shared spectrum), or sidelinks, as well as unlicensed bands.

[0213] Example 1

[0214] This embodiment proposes a method for configuring uplink control information to be included in the uplink data channel by the UE, targeting a base station and a UE operating in an unlicensed frequency band. More specifically, a method and apparatus are proposed, wherein the UE determines or identifies the uplink control information to be included in the uplink data channel by determining the priority of the uplink control information based on information configured or indicated by the base station.

[0215] The operation of this embodiment will refer to Figure 8 The description is as follows.

[0216] Figure 8 This is a diagram illustrating the generation of uplink control information according to an embodiment of the present disclosure.

[0217] refer to Figure 8In a base station and UE transmitting or receiving signals in an unlicensed frequency band, assuming the UE is configured to perform PUCCH and / or PUSCH transmissions in multiple time slots based on a configured licensed configuration, the UE may perform individual coding for each payload corresponding to uplink control information 800 (e.g., CG-UCI, HARQ-ACK, CSI-part1, or CSI-part2) to be transmitted to the CG-PUSCH, including code block generation 801 and channel coding / decoding 802. Subsequently, the uplink control information is rate matched 803, code block concatenated 804, and multiplexed 805 to the PUSCH. Based on the CG-PUSCH resources configured or scheduled by the base station and a maximum of X (e.g., X = 3) uplink control information entries that can be included in the uplink data channel (which may be pre-configured (or predetermined) by the base station or configured via L1 or higher signaling), the UE may determine or define the method for configuring the uplink control information to be included in the uplink data channel. The following section presents a method for determining or prioritizing uplink control information.

[0218] Example 1-1

[0219] The UE can determine that CG-UCI is the uplink control information with the highest priority and can add at least one uplink control information to CG-PUSCH to transmit it. The UE can transmit X uplink control information messages with the highest priority, including CG-UCI, via CG-PUSCH, and other uplink control information may not be included in CG-PUSCH (or may be omitted or delayed). For example, if the maximum number of uplink control information messages that can be included in CG-PUSCH is 3, the UE can add CG-UCI, HARQ-ACK, and CSI part 1 to CG-PUSCH to transmit them, and can omit (or delay) CSI part 2. Alternatively, the UE can add only CG-UCI to CG-PUSCH to transmit it, and other uplink control information may not be included in CG-PUSCH. A more specific method for determining that CG-UCI has the highest priority will be described below.

[0220] Method 1

[0221] If the base station configures the semi-static HARQ-ACK codebook to be used via L1 signaling or higher (or if the HARQ-ACK codebook size is fixed), the UE can determine that CG-UCI has the highest priority.

[0222] Method 2

[0223] The base station can activate the UE's control channel transmission using downlink control information. During the transmission of one or more CG-PUSCHs activated via downlink control information, the UE can determine that the CG-UCI has the highest priority only if the transmission is performed when uplink control information is included in the first CG-PUSCH.

[0224] Method 3

[0225] The base station (or UE) can instruct the UE (or base station) to add uplink control information (e.g., MCS, beta offset, TBS, etc.) to the CG-UCI via default values ​​(or predefined information), L1 signaling, or higher signaling. Here, the UE can determine that the CG-UCI has the highest priority.

[0226] Examples 1-2

[0227] The UE can determine that HARQ-ACK is the uplink control information with the highest priority, and can add at least one uplink control information to the CG-PUSCH in order to send that uplink control information. The UE can send X uplink control information messages with the highest priority, including HARQ-ACK, via the CG-PUSCH, and uplink control information messages other than these X messages may not be included in the CG-PUSCH (or may be omitted or delayed).

[0228] For example, if the maximum number of uplink control information entries that can be included in the CG-PUSCH is 2, the UE can add HARQ-ACK and CG-UCI to the CG-PUSCH to send them, and CSI Part 1 and CSI Part 2 may be omitted. Alternatively, the UE can add only HARQ-ACK to the CG-PUSCH to send HARQ-ACK, or it can send HARQ-ACK by using the PUCCH without sending (or delaying or omitting) the CG-PUSCH. In this case, uplink control information other than HARQ-ACK may not be sent. As another method, when the UE wants to send HARQ-ACK by using the PUCCH without sending the CG-PUSCH, if a gap is created between the PUCCH transmission and subsequent CG-PUSCH transmission due to the absence of the CG-PUSCH, and a channel access procedure needs to be performed, the UE can puncture the CG-PUSCH with a symbol length corresponding to the PUCCH to send HARQ-ACK, and then perform the transmission. More specific methods where HARQ-ACK may have the highest priority will be described below.

[0229] Method 4

[0230] If the base station is configured to use a dynamic HARQ-ACK codebook via L1 signaling or higher (or if the HARQ-ACK codebook size is variable), the UE can determine that HARQ-ACK has the highest priority.

[0231] Method 5

[0232] If the UE needs to send at least one HARQ-ACK message with multiple priorities (e.g., a HARQ-ACK for URLLC data or a HARQ-ACK for eMBB data), the UE can determine or change (or reconfigure) the uplink control information transmission scheme based on the priority of the HARQ-ACK. More specifically, compared with other uplink control information (e.g., CG-UCI, CSI Part 1, or CSI Part 2), the UE can determine that the HARQ-ACK with the highest priority (e.g., a HARQ-ACK for URLLC data) has the highest priority.

[0233] In Application Example 1, the priority of uplink control information can be configured via L1 signaling or higher signaling, or determined via UE capability reports. In the case of Example 1, the UE can determine the uplink control information to be included in the CG-PUSCH based on the priority of each uplink control message and the CG-PUSCH configured (or scheduled) by the base station. However, there is a drawback that it cannot send uplink control information other than the maximum number of uplink control messages that can be included in the CG-PUSCH.

[0234] Example 2

[0235] This embodiment proposes a method for configuring uplink control information to be included in the uplink data channel by the UE for base stations and UEs operating in unlicensed frequency bands.

[0236] A more specific description follows. In a base station and UE transmitting or receiving signals in an unlicensed frequency band, it is assumed that the UE is configured to perform PUCCH / PUSCH transmissions in multiple time slots based on a configured licensed configuration. The UE may perform joint coding of a jointly coded payload corresponding to X (e.g., X=2) uplink control information entries in uplink control information (e.g., CG-UCI, HARQ-ACK, CSI Part 1, and CSI Part 2), which will be included in the CG-PUSCH and transmitted.

[0237] Figure 9a This is a diagram illustrating the joint encoding of uplink control information according to an embodiment of the present disclosure.

[0238] For example, refer to Figure 9aThe UE can generate code blocks 902 by bundling the payloads of CG-UCI 900 and HARQ-ACK 901, and then perform channel coding / decoding 903. Subsequently, the encoded uplink control information is rate-matched 904, each code block is concatenated 905, and then the encoded uplink control information is multiplexed 906 to the PUSCH.

[0239] Figure 9b This is a diagram illustrating the joint encoding of uplink control information according to an embodiment of the present disclosure.

[0240] refer to Figure 9b The UE can generate code blocks 908 and 915 for CG-UCI 907 and HARQ-ACK 909 respectively, and then perform joint channel coding and decoding 910 and 911 for each generated code block. Subsequently, the encoded uplink control information is rate matched 912, each code block is concatenated 913, and then the encoded uplink control information is multiplexed 914 to PUSCH. Figure 9b This diagram illustrates another example of jointly encoded uplink control information. As an alternative approach, the UE can generate block codes for each of CG-UCI and HARQ-ACK, and then generate code blocks by assuming each generated code block is a payload. The UE can determine that the jointly encoded uplink control information has the highest priority and can add it to CG-PUSCH 906, 914.

[0241] When applying Embodiment 2, the values ​​of the X payloads used to perform joint coding can be configured via L1 signaling or higher signaling, or determined by the UE capability report. The advantage of this embodiment is that the UE can add all uplink control information configured (or scheduled) within the CG-PUSCH resources to the CG-PUSCH configured (or scheduled) by the base station for transmission. However, the disadvantage of this embodiment is that if the CG-PUSCH resources for transmitting uplink control information are insufficient, uplink control information cannot be added to the CG-PUSCH.

[0242] Example 3

[0243] This embodiment proposes a method for configuring uplink control information to be included in the uplink data channel by the UE, targeting a base station and a UE operating in an unlicensed frequency band. More specifically, the embodiment proposes a method and apparatus in which the UE determines or identifies the uplink control information to be included in the uplink data channel using information configured or indicated by the base station.

[0244] In a base station and UE transmitting or receiving signals in an unlicensed frequency band, it is assumed that the UE is configured to perform PUCCH and / or PUSCH transmissions in multiple time slots based on a configured licensed configuration. The UE can generate uplink control information using either a separate coding method or a joint coding method, as an encoding method for generating uplink control information (e.g., CG-UCI, HARQ-ACK, CSI Part 1, and CSI Part 2) to be transmitted to the CG-PUSCH based on information from L1 signaling or higher signaling configurations (or indications), or via CG-PUSCH resource information from L1 signaling or higher signaling configurations (or scheduling) from the base station. Separate coding refers to a method of encoding by applying channel coding / decoding to each payload corresponding to the uplink control information, and joint coding refers to a method of jointly encoding at least two payloads corresponding to the uplink control information. If the UE decides or determines a separate coding scheme as the encoding method for generating uplink control information, the uplink control information to be included in the CG-PUSCH is determined or determined based on the first embodiment. If the UE determines a joint coding scheme as the coding method for generating uplink control information, then the uplink control information to be included in the CG-PUSCH is determined based on the second embodiment. Hereinafter, a method for determining whether to perform individual coding and joint coding based on information configured (or indicated) from the base station will be described.

[0245] Example 3-1

[0246] Based on the CSI reporting channel configured via L1 signaling or higher from the base station, the UE can determine a scheme for encoding uplink control information to be included in the CG-PUSCH. More specifically, if the base station instructs the UE to perform CSI reporting using the PUCCH (e.g., semi-persistent CSI reporting or periodic CSI reporting using MAC CE), the UE can generate the uplink control information to be included in the CG-PUSCH by performing separate encoding for generating the uplink control information. Alternatively, if the UE receives an uplink grant DCI scrambled with SP-CSI-RNTI from the base station, or if the base station instructs the UE to perform non-periodic CSI reporting based on the DCI, the UE can perform a joint encoding method for generating the uplink control information to generate the uplink control information to be included in the CG-PUSCH.

[0247] Example 3-2

[0248] If the UE receives DCI format 0_1 ​​from the base station, it can use the "UL-SCH indicator" field value included in the DCI to configure the encoding scheme for uplink control information. More specifically, if the "UL-SCH indicator" field value included in the DCI format 0_1 ​​received from the base station indicates 0, the UE can generate uplink control information using a joint encoding method. In other cases, the UE can generate uplink control information using a separate encoding method.

[0249] Example 3-3

[0250] The UE can determine the encoding method for generating uplink control information based on the amount of resources available for the CG-PUSCH configured or scheduled by the base station. More specifically, if the UE cannot add uplink control information generated using joint coding to the CG-PUSCH due to insufficient resources for transmitting uplink control information to the CG-PUSCH configured or scheduled by the base station (e.g., when Equation 2 below is satisfied), then the UE can generate uplink control information using the joint coding method. If the UE can add uplink control information generated using at least joint coding to the CG-PUSCH due to sufficient resources for transmitting uplink control information to the CG-PUSCH configured or scheduled by the base station (e.g., when Equation 2 below is not satisfied), then the UE can generate uplink control information using the joint coding method.

[0251] [Equation 2]

[0252]

[0253] Here, O CG-UCI and O ACK These represent the number of bits in the payload of CG-UCI and HARQ-ACK, respectively, and LCG-UCI,ACK represents the number of CRC bits. r It is the size of the r-th code block, and This represents the number of subcarriers in each OFDM symbol that can be used for UCI transmissions in the PUSCH for base station configuration or scheduling. Additionally, α and It is a value configured by the base station and determined via higher signaling or L1 signaling.

[0254] When applying Embodiment 3, the base station can instruct the UE to selectively determine the encoding scheme when generating uplink information via L1 signaling, higher signaling, or UE capability reports. According to Embodiment 3, the advantage is that the UE determines the encoding method for generating uplink control information differently based on the importance of the uplink control information and the resources of the CG-PUSCH configured or scheduled by the base station. Therefore, the UE can add uplink control information to the CG-PUSCH for more flexible transmission of uplink control information.

[0255] Example 4

[0256] This embodiment proposes a method for mapping uplink control information generated by the UE to an uplink data channel for base stations and UEs operating in unlicensed frequency bands. More specifically, this embodiment proposes a method and apparatus in which the UE determines the priority of the uplink control information based on information configured or indicated by the base station, and adds (or maps) the uplink control information generated using a separate coding scheme to the CG-PUSCH based on the determined priority.

[0257] Example 4-1

[0258] Figure 10 This is a diagram illustrating CG-UCI mapping according to an embodiment of the present disclosure.

[0259] Reference Figure 10 The embodiments are described below.

[0260] refer to Figure 10 If the UE transmits a CG-PUSCH that only includes CG-UCI, the UE can add CG-UCI to the CG-PUSCH based on the aforementioned HARQ-ACK multiplexing rules. More specifically, the UE can map CG-UCI 1001 to the CG-PUSCH from the first OFDM symbol 1002 (excluding DMRS) following the first DMRS symbol 1000. Here, the RE interval between uplink control information symbols on the frequency axis can be determined in the same manner as described above.

[0261] Example 4-2

[0262] Figure 11 This is a diagram illustrating CG-UCI mapping according to an embodiment of the present disclosure.

[0263] refer to Figure 11After determining and prioritizing the uplink control information as described above, the UE can add the uplink control information to the CG-PUSCH. If the UE determines (or confirms) that CG-UCI is the uplink control information with the highest priority, the UE can, according to the HARQ-ACK multiplexing rules described above, first map CG-UCI 1103 to the CG-PUSCH, and then map HARQ-ACK 1101 to the CG-PUSCH in the same way, as follows. Figure 11 As shown in part (a)(1110). In other words, the UE can first map CG-UCI 1103 to CG-PUSCH from the first OFDM symbol 1104 (excluding DMRS) following the first DMRS symbol 1100. Here, the RE interval between uplink control information symbols on the frequency axis can be determined in the same manner as described above. Subsequently, the UE can map HARQ-ACK 1101 to CG-PUSCH from the first OFDM symbol 1104 (excluding DMRS) following the DMRS symbol 1100, based on the aforementioned multiplexing rules for HARQ-ACK with no mapped CG-UCI. If the UE decides (or determines) that HARQ-ACK is the uplink control information with the highest priority, the UE can map the uplink control information to CG-PUSCH in the same manner as described above, as follows. Figure 11 Part (b)(1120) is shown.

[0264] Example 4-3

[0265] Figure 12 This is a diagram illustrating the CG-UCI mapping according to an embodiment of this disclosure.

[0266] refer to Figure 12 After determining and prioritizing the uplink control information as described above, the UE can add the uplink control information to the CG-PUSCH. If the UE determines (or confirms) that CG-UCI 1203 is the uplink control information with the highest priority, the UE can fix the RE interval between uplink control information symbols on the frequency axis to 1, and then map CG-UCI to CG-PUSCH, as follows. Figure 12As shown in part (a)(1210). In other words, the UE can map CG-UCI 1203 to CG-PUSCH from the first OFDM symbol 1204 (excluding DMRS) following the first DMRS symbol 1200. Subsequently, the UE can map HARQ-ACK 1201 to CG-PUSCH from the first OFDM symbol 1204 (excluding DMRS) following the DMRS symbol, based on the aforementioned multiplexing rules for HARQ-ACK with no mapped CG-UCI. Here, the RE interval between HARQ-ACK symbols on the frequency axis can be fixed to 1, or it can be determined based on the aforementioned multiplexing rules for HARQ-ACK (e.g., Equation 1). If the UE decides (or determines) that HARQ-ACK is the uplink control information with the highest priority, the UE can map the uplink control information to CG-PUSCH in the same manner as described above, as follows. Figure 12 Part (b)(1220) is shown.

[0267] Example 4-4

[0268] If the base station configures or schedules multiple DMRS symbols to the UE in a CG-PUSCH via L1 signaling or higher signaling (or a combination thereof), the UE can change or adjust (or reconfigure) the OFDM symbol positions mapped to the uplink control information included in the CG-PUSCH according to the priority of the uplink control information.

[0269] Figure 13 This is a diagram illustrating the CG-UCI mapping according to an embodiment of this disclosure.

[0270] refer to Figure 13 After determining and prioritizing the uplink control information as described above, the UE can add the uplink control information to the CG-PUSCH. If the UE determines (or confirms) that CG-UCI 1303 is the uplink control information with the highest priority, the UE can first map CG-UCI 1303 to the CG-PUSCH based on the aforementioned multiplexing rules of HARQ-ACK1301, such as... Figure 13 Part (a)(1310) is shown. In other words, in Figure 13In part (a)(1310), the UE can map CG-UCI to CG-PUSCH from the first OFDM symbol 1304 (excluding DMRS) following the first DMRS symbol 1300. Subsequently, the UE can map HARQ-ACK 1301 to CG-PUSCH from the first OFDM symbol 1305 (excluding DMRS) following the second (or last) DMRS symbol 1300 based on the multiplexing rules of HARQ-ACK 1301. As another method, such as Figure 13 As shown in part (b)(1320), the UE can map HARQ-ACK to CG-PUSCH from the first OFDM symbols 1306 and 1307, excluding DMRS, before the second DMRS (or the last DMRS) symbol, based on the multiplexing rules of HARQ-ACK 1301.

[0271] If the UE determines (or confirms) that HARQ-ACK1301 is the uplink control information with the highest priority, the UE can map the uplink control information to CG-PUSCH in the same way as described above, such as... Figure 13 As shown in part (c)(1330) or part (d)(1340).

[0272] Examples 4-5

[0273] Figure 14 This is a diagram illustrating CG-UCI mapping according to an embodiment of the present disclosure.

[0274] refer to Figure 14 After determining and prioritizing the uplink control information as described above, the UE can add the uplink control information to the CG-PUSCH. If the UE determines (or confirms) that the CG-UCI is the uplink control information with the highest priority, the UE can map the CG-UCI 1403 to the CG-PUSCH according to the same rules as the aforementioned HARQ-ACK multiplexing method, starting from the first OFDM symbol 1404 (excluding the DMRS symbol) preceding the first DMRS symbol 1400, as follows. Figure 14As shown. The UE can map HARQ-ACK 1401 to CG-PUSCH from the first OFDM symbol 1405 (excluding DMRS) following the DMRS symbol, based on the previously mentioned multiplexing rules for HARQ-ACKs on REs not mapped to CG-UCI. If the UE determines (or confirms) that HARQ-ACK is the uplink control information with the highest priority, the UE can first map HARQ-ACK 1401 to CG-PUSCH in the same manner as the aforementioned HARQ-ACK multiplexing. Then, for REs without mapped HARQ-ACKs, the UE can map CG-UCI 1403 to the REs without mapped HARQ-ACK 1401 in the manner described in the embodiment.

[0275] Examples 4-6

[0276] Figure 15 This is a diagram illustrating CG-UCI mapping according to an embodiment of the present disclosure.

[0277] refer to Figure 15 After determining and prioritizing the uplink control information as described above, the UE can add the uplink control information to the CG-PUSCH. If the UE determines (or confirms) that the CG-UCI is the uplink control information with the highest priority, the UE can map the CG-UCI 1503 to the CG-PUSCH from the first OFDM symbol 1504 (not the DMRS) according to the same rules as the aforementioned HARQ-ACK multiplexing method, as shown below. Figure 15 As shown. Subsequently, the UE can map HARQ-ACK 1501 to CG-PUSCH from the first OFDM symbol 1505 (excluding DMRS) following DMRS symbol 1500, based on the aforementioned HARQ-ACK multiplexing rules for REs without mapped CG-UCI. Then, the UE can map CSI part 1 1502 to CG-PUSCH from the first OFDM symbol 1504 (not DMRS) according to the same rules as the aforementioned CSI part 1 multiplexing method for REs without mapped CG-UCI 1503 and HARQ-ACK 1501. If the UE decides (or determines) that HARQ-ACK is the uplink control information with the highest priority, the UE can first map HARQ-ACK1501 to CG-PUSCH in the same way as the aforementioned HARQ-ACK multiplexing. Then, for REs that do not have HARQ-ACK mapped, the UE can map CG-UCI to the CG-PUSCH of the RE that does not have HARQ-ACK mapped in the manner described in the embodiment.

[0278] Example 5

[0279] This embodiment proposes a method for mapping uplink control information generated by the UE to an uplink data channel for base stations and UEs operating in unlicensed frequency bands. More specifically, this embodiment proposes a method and apparatus in which, when the UE generates uplink control information using joint coding based on information configured or indicated by the base station, the UE maps the uplink control information to the CG-PUSCH.

[0280] Figure 16 This is a diagram illustrating CG-UCI mapping according to an embodiment of the present disclosure.

[0281] refer to Figure 16 If the UE performs joint coding of CG-UCI and HARQ-ACK, and the jointly coded uplink control information is included in the CG-PUSCH, then the UE can add the jointly coded uplink control information to the CG-PUSCH based on the aforementioned HARQ-ACK multiplexing rules. More specifically, the UE can map the jointly coded uplink control information 1603 from the first OFDM symbol 1605 (excluding DMRS) following the first DMRS symbol 1601 to the CG-PUSCH. Here, the RE interval between uplink control information symbols on the frequency axis can be determined in the same manner as described above.

[0282] Example 6

[0283] This embodiment proposes a method for mapping uplink control information generated by the UE to the uplink data channel for base stations and UEs operating in unlicensed frequency bands.

[0284] Figure 17 This is a diagram illustrating a UCI mapping according to an embodiment of the present disclosure.

[0285] refer to Figure 17 Suppose the base station configures or schedules the UE to transmit multiple CG-PUSCH 1705 and 1706 in a time slot. If the uplink control channel to be transmitted by the UE overlaps with multiple CG-PUSCH 1705 and 1706 in a time slot, the UE can add existing uplink control information (e.g., HARQ-ACK 1703, CSI part 1 1702, and CSI part 2) to the last CG-PUSCH 1706 overlapping with the uplink control channel for transmission. CG-UCI 1704 can be mapped to a first OFDM symbol 1707 (excluding DMRS) following the first DMRS symbol 1701. Here, the method for configuring or generating the uplink control information to be included in the last CG-PUSCH 1706 can include applying the above scheme or a combination thereof.

[0286] Example 7

[0287] In embodiments of this disclosure, methods for configuring beta offset values ​​when applying joint or individual encoding methods will be described.

[0288] When the UE does not send a HARQ-ACK to the corresponding CG-PUSCH, i.e., when at least one of the UCIs—CG-UCI, CSI Part 1, and CSI Part 2—is multiplexed to the CG-PUSCH, the base station can configure a separate beta offset for the UE via L1 signaling and higher signaling, using the method described above, to determine the number of modulation symbols for encoding and decoding the CG-UCI; that is, the beta offset value for the CG-UCI. A separate index can also be configured based on the payload size of the CG-UCI to configure the beta offset.

[0289] When a UE multiplexes HARQ-ACK onto CG-PUSCH and transmits the multiplexed HARQ-ACK, as a higher configuration, the base station can configure whether to apply joint coding or separate coding to HARQ-ACK and CG-UCI. For example, when the base station configures the joint coding method to a higher configuration, the UE can generate UCI by encoding HARQ-ACK with CG-UCI. If the base station does not configure the joint coding to apply a higher configuration, the UE can transmit HARQ-ACK using PUCCH without transmitting CG-PUSCH. When generating UCI using joint coding, the beta offset value can be configured or indicated in the following manner.

[0290] Method 1 uses beta offset for CG-UCI

[0291] When the base station applies a joint coding method, the UE can use the beta offset of CG-UCI. The number of modulation symbols to be encoded and decoded when applying the joint coding method is determined as shown in Equation 3.

[0292] [Equation 3]

[0293]

[0294] Here, O ACK and O CG-UCI These represent the number of bits in the HARQ-ACK and CG-UCI payloads, respectively. Each payload may include each CRC as described above, while L ACK / CG-UCI This refers to the number of CRC bits after joint encoding. K r It is the size of the r-th code block, and This indicates the number of subcarriers in each OFDM symbol that can be used for transmission in the PUSCH for base station configuration or scheduling.

[0295] Method 2 uses a separate CG-UCI index

[0296] The base station can configure the beta offset value for joint coding at time when the UE applies joint coding by using a separate CG-UCI index. The CG-UCI index can also be configured individually based on the number of UCI information bits in the joint coding. For example, the base station can separately... and The system is configured to indicate the beta offset value for CG-UCI (e.g., when the HARQ-ACK payload is 0), the beta offset value when the number of information bits jointly encoded by CG-UCI and HARQ-ACK is Y bits or less, and the index of the beta offset value when the number of information bits jointly encoded by CG-UCI and HARQ-ACK is greater than Y bits. A set of beta offset values ​​can be configured for the UE. The UE can use the beta offset value indicated by the corresponding index according to the CG-UCI and HARQ-ACK encoding method.

[0297] Method 3 HARQ-ACK beta offset

[0298] When the base station is configured with application joint coding, the UE can use the beta offset for HARQ-ACK. To determine the number of modulation symbols used in encoding and decoding when applying a joint coding method.

[0299] [Equation 4]

[0300]

[0301] Method 4 for beta offset in CG-UCI / HARQ-ACK joint coding

[0302] When the base station is configured to apply joint coding, the UE can use the UCI for joint coding. The individual beta offset determines the number of modulation symbols used in encoding and decoding when applying a joint coding method.

[0303] The base station can configure a beta offset value for CG-UCI / HARQ-ACK joint coding for the UE as a separate index, based on the payload size.

[0304] Method 5 is a method for determining the CG-UCI or HARQ-ACK beta offset.

[0305] When the base station configures joint coding, the UE can determine the beta offset value when applying the joint coding method by using one of the values ​​of CG-UCI and HARQ-ACK beta offsets. For example, the UE can configure the beta offset value when applying the joint coding method by using a function of CG-UCI and HARQ-ACK beta offsets. For example, when the base station configures the beta offset configuration method to semi-static, as shown in Equation 6, the UE can configure the beta offset value when applying the joint coding method to the smaller or larger value of CG-UCI and HARQ-ACK beta offsets.

[0306] [Equation 6]

[0307]

[0308] If the base station configures the beta offset configuration method to be dynamic, the UE can reconfigure and indicate the set of beta offset values ​​for HARQ-ACK and the set of beta offset values ​​for CG-UCI, indicated by the indexes indicated by their respective beta offset indicators. For example, when the base station configures the beta offset values ​​for the UE as shown in Table 9, the UE can assume that the value indicated by each beta offset indicator field indicates the maximum or minimum beta offset value among the CG-UCI and HARQ-ACK beta offset values ​​indicated by the corresponding field. Furthermore, this value can vary depending on the magnitude of the joint coding value.

[0309] Table 9

[0310]

[0311] In the same manner as in Equation 5, the UE can use a determined beta offset value to determine the number of modulation symbols for encoding and decoding when applying the joint coding method.

[0312] Configure the beta offset value for the joint coding method of CG-UCI and HARQ-ACK and beta offset value used for CG-UCI The method can be as follows. If, for the base station, a back-off DCI (or DCI scrambled with C-RNTI, CS-RNTI, or DCI format 0_0) or a non-back-off DCI (or DCI scrambled with C-RNTI, CS-RNTI, or DCI format 0_1) indicates PUSCH (or CG-PUSCH) transmission, and the UE receives a beta offset value configured as "semi-static" as a higher configuration, then the UE can have a beta offset value configured as a higher configuration. In this case, the beta offset value can be configured in a table, and the base station can indicate the index of the corresponding value as a higher configuration. Depending on the number of bits of the joint coding information or the number of bits of the CG-UCI information, the beta offset can have a separate index.

[0313] If the base station schedules PUSCH (or CG-PUSCH) transmissions for the UE using a non-back-off DCI (a DCI scrambled with C-RNTI, CS-RNTI, or DCI format 0_1), and the non-back-off DCI (a DCI scrambled with C-RNTI, CS-RNTI, or DCI format 0_1) has a beta offset indicator field, i.e., the base station configures the beta offset value to "dynamic" as a higher configuration, then the base station can configure beta offset values ​​for the X set with indices indicating beta offset values ​​for CG-UCI or jointly encoded beta offset values, and can configure the same values ​​for the UE. Using the beta offset indicator field, the UE can indicate the beta offset value to be used when multiplexing CG-UCI or jointly encoded CG-UCI to the PUSCH (or CG-PUSCH), and each index can be determined based on the number of information bits of the CG-UCI or jointly encoded CG-UCI, as in the aforementioned method.

[0314] Depending on whether the beta offset configuration method is semi-static or dynamic, the aforementioned methods can be applied differently, and combinations of these methods can also be used to determine the beta offset value. For example, if the beta offset configuration method is semi-static, the UE can determine the beta offset value by selecting one of the following from the configured beta offset values: the CG-UCI value, the HARQ-ACK value, or the maximum or minimum value of either CG-UCI or HARQ-ACK. If the beta offset configuration method is dynamic, the UE can configure the beta offset value based on the payload of the UCI jointly encoded by CG-UCI and HARQ-ACK and the magnitude of the CG-UCI payload, and can also configure the beta offset value by applying semi-static and dynamic methods in reverse. It is also possible to determine the beta offset value of CG-UCI and the jointly encoded UCI via a combination of the above methods.

[0315] Figure 18 This is a diagram illustrating the operation of a base station according to an embodiment of the present disclosure.

[0316] refer to Figure 18 In operation 1800, the base station can send configurations related to PDCCH, PDSCH, PUCCH, and PUSCH transmission / reception to the UE via a higher signal. For example, the base station can send the PDCCH resource area, CORESET, search space configuration, etc., for receiving downlink or uplink scheduling information to the UE via a higher signal. The base station can send configurations related to PDSCH / PUSCH transmission / reception (including offset information between the PDCCH receive time slot and the PDSCH receive time slot or PUSCH transmit time slot), information about the number of repeated transmissions of PDSCH or PUSCH, etc., to the UE via a higher signal. In operation 1810, the base station can additionally send configuration information related to authorization, such as the authorized transmission period and offset information. In operation 1810, the base station can additionally send configuration information related to CSI reporting, such as resources, reporting methods, and reporting periods for CSI reporting. The authorization and CSI reporting configuration information sent to the UE in operation 1810 can also be sent in operation 1800. In operation 1820, when the UCI is included in the CG-PUSCH, the base station can indicate necessary information to the UE, such as the CSI reporting scheme, by using downlink control information. In operation 1830, the base station can receive and decode the CG-PUSCH and the uplink control information included in the CG-PUSCH based on information configured to the UE by the base station.

[0317] Figure 19 This is a diagram illustrating the operation of a UE according to an embodiment of this disclosure.

[0318] refer to Figure 19In operation 1900, the UE receives configurations related to the transmission / reception of PDCCH, PDSCH, PUCCH, and PUSCH from the base station via a higher signal, and performs these configurations based on the received configuration information. For example, the UE may receive PDCCH resource areas, CORESET configurations, search space configurations, etc., for receiving downlink or uplink scheduling information from the base station via a higher signal. In operation 1910, the UE may additionally receive configuration information related to authorization, such as the authorized transmission period and offset information. In operation 1910, the UE may additionally receive configuration information related to CSI reporting, such as resources, reporting methods, and reporting periods for CSI reporting. The authorization-related configuration information and CSI reporting-related configuration information configured in operation 1910 may also be included in the higher signal configuration information transmitted in operation 1900. In operation 1920, the UE may receive downlink control information to receive necessary information, such as the CSI reporting scheme, from the base station when the CG-PUSCH includes UCI. If the UE does not generate a UCI to be included in the CG-PUSCH based on separate coding in operation 1930, then in operation 1940, the UE can generate the UCI using joint coding and then multiplex the UCI into the CG-PUSCH for transmission. If the UE generates a UCI to be included in the CG-PUSCH based on separate coding in operation 1930, then the UE can generate the UCI using separate coding, multiplex the UCI into the CG-PUSCH based on the priority of the UCI configured by the base station, and then transmit the CG-PUSCH.

[0319] Figure 20 This is a block diagram illustrating the internal structure of a base station according to an embodiment of the present disclosure.

[0320] refer to Figure 20The base station disclosed herein may include a base station receiver 2000, a base station transmitter 2010, and a base station processor 2020. The base station receiver 2000 and the base station transmitter 2010 may be collectively referred to as a transceiver. The transceiver may transmit signals to or receive signals from the UE. These signals may include control information and data. For this purpose, the transceiver may include a radio frequency transmitter configured to perform up-conversion and amplification of the frequency of the transmitted signal, a radio frequency receiver configured to perform low-noise amplification of the received signal, and down-conversion of the frequency of the received signal, etc. Furthermore, the transceiver may receive signals via a radio channel, output signals to the base station processor 2020, and transmit signals output from the base station processor 2020 via a radio channel. The base station processor 2020 may control a series of processes to cause the base station to operate according to the above embodiments of this disclosure. Additionally, the base station processor 2020 may perform a channel access procedure for unlicensed frequency bands. For a specific example, the base station processor 2020 can receive signals transmitted via an unlicensed frequency band, and the base station processor 2020 can determine whether the unlicensed frequency band is idle by comparing the strength of the received signal with a predetermined threshold of a function, which is predetermined or takes bandwidth, etc., as a parameter. As another example, the base station processor 2020 can determine or change (or reconfigure) the multiplexing scheme of UCIs to be received by the base station, and a signal including information indicating the multiplexing scheme can be transmitted by the base station transmitter 2010 via a downlink control channel or a data channel.

[0321] Figure 21 This is a block diagram illustrating the internal structure of a UE according to an embodiment of the present disclosure.

[0322] refer to Figure 21The UE disclosed herein may include a UE receiver 2100, a UE transmitter 2110, and a UE processor 2120. The UE receiver 2100 and the UE transmitter 2110 may be collectively referred to as a transceiver. The transceiver may transmit signals to or receive signals from a base station. These signals may include control information and data. For this purpose, the transceiver may include a radio frequency transmitter configured to perform up-conversion and amplification of the frequency of the transmitted signal, a radio frequency receiver configured to perform low-noise amplification of the received signal, and down-conversion of the frequency of the received signal, etc. Furthermore, the transceiver may receive signals via a radio channel, output signals to the UE processor 2120, and transmit signals output from the UE processor 2120 via a radio channel. The UE processor 2120 may control a series of processes to cause the UE to operate according to the above embodiments. For example, the UE receiver 2100 may receive data signals including control signals, and the UE processor 2120 may determine the reception result of the data signals. Subsequently, when the first signal reception result, including data reception, is to be sent to the base station at the specified timing, the UE transmitter 2110 sends the first signal reception result to the base station at the timing determined by the processor. As another example, when the UE receiver 2100 receives configuration information from the base station regarding the method for generating and multiplexing a UCI included in the CG-PUSCH for transmission, the UE processor 2120 can accordingly generate a UCI and add it to the CG-PUSCH, and the UE transmitter 211 can transmit an uplink data signal including uplink control information.

[0323] Although the invention has been shown and described with reference to various embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

[0324] Furthermore, the various embodiments described above can be used in combination as needed. For example, the methods proposed in this disclosure can be partially combined to operate a base station and a UE. Moreover, although embodiments have been presented based on 5G and NR systems, other modifications based on the technical spirit of the embodiments can be implemented in other systems, such as LTE, LTE-A, LTE-A-Pro, and V2X systems.

Claims

1. A method performed by a terminal in a communication system, the method comprising: Receive an indicator from the base station indicating whether the Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information and the configured Grant-Uplink Control Information (CG-UCI) should be jointly encoded; The transmission of the HARQ-ACK information overlaps with the configured Grant-Physical Uplink Shared Channel (CG-PUSCH) transmission; If the indicator indicates that the HARQ-ACK information and the CG-UCI should be jointly encoded, then the joint encoding of the HARQ-ACK information and the CG-UCI is performed. Based on the beta offset value of the HARQ-ACK information, determine the number of modulation symbols for encoding and decoding the combined information bits of the CG-UCI and the HARQ-ACK information; and Based on the determined number of modulation symbols used in the encoding and decoding, uplink data containing the HARQ-ACK information and the CG-UCI is transmitted to the base station on the CG-PUSCH. The beta offset value of the HARQ-ACK information is identified based on the combined number of information bits of the CG-UCI and the HARQ-ACK information.

2. The method according to claim 1, wherein, When the number of combined information bits is less than or equal to the threshold, the beta offset value is identified as the first beta offset value, and when the number of combined information bits is greater than the threshold, it is identified as the second beta offset value.

3. The method according to claim 1, wherein, The beta offset value is configured by at least one of the higher-layer signaling or beta offset indicator included in the downlink control information associated with the CG-PUSCH.

4. The method according to claim 1, wherein, The combined information bits are mapped onto resource elements included in at least one orthogonal frequency division multiplexing (OFDM) symbol, which begins with the first OFDM symbol following the first OFDM symbol carrying the demodulation reference signal (DMRS) for CG-PUSCH.

5. The method according to claim 1, wherein, The number of modulation symbols for encoding and decoding the combined information bits is based on the following equation: Among them, O ACK This corresponds to the number of bits in the HARQ-ACK information, O CG-UCI L is the number of bits corresponding to the CG-UCI. ACK / CG-UCI It is the number of cyclic redundancy check (CRC) bits used for the HARQ-ACK information and the CG-UCI, and It is the beta offset value, and K is the number of subcarriers used for uplink control information in OFDM symbols, and K r (l) is the size of the r-th code block used in CG-PUSCH. It is the total number of OFDM symbols transmitted by PUSCH; C UL-SCH α is the number of code blocks transmitted via PUSCH; and α is the value configured by the base station.

6. A method performed by a base station in a communication system, the method comprising: Send an indicator to the terminal indicating whether the Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) message and the configured Grant-Uplink Control Information (CG-UCI) should be jointly encoded; Identify overlap between the reception of the HARQ-ACK information and the configured Grant-Physical Uplink Shared Channel (CG-PUSCH) reception; When the indicator indicates that the HARQ-ACK information and the CG-UCI are to be jointly encoded, uplink data with the HARQ-ACK information and the CG-UCI on the CG-PUSCH is received from the terminal; and The HARQ-ACK information and the CG-UCI are obtained based on the number of modulation symbols used in encoding and decoding the combined information bits of the CG-UCI and the HARQ-ACK information, determined according to the beta offset value of the HARQ-ACK information. The beta offset value of the HARQ-ACK information is identified based on the combined number of information bits of the CG-UCI and the HARQ-ACK information.

7. The method according to claim 6, wherein when the number of combined information bits is less than or equal to a threshold, the beta offset value is identified as a first beta offset value, and when the number of combined information bits is greater than the threshold, it is identified as a second beta offset value.

8. The method according to claim 6, wherein, The beta offset value is configured by at least one of the higher-layer signaling or beta offset indicator included in the downlink control information associated with the CG-PUSCH.

9. The method according to claim 6, wherein, The combined information bits are mapped onto resource elements included in at least one orthogonal frequency division multiplexing (OFDM) symbol, which begins with the first OFDM symbol following the first OFDM symbol carrying the demodulation reference signal (DMRS) for the CG-PUSCH.

10. The method according to claim 6, wherein, The number of modulation symbols for encoding and decoding the combined information bits is based on the following equation: Among them, O ACK This corresponds to the number of bits in the HARQ-ACK information, O CG-UCI L is the number of bits corresponding to the CG-UCI. ACK / CG-UCI It is the number of cyclic redundancy check (CRC) bits used for the HARQ-ACK information and the CG-UCI, and It is the beta offset value, and K is the number of subcarriers used for uplink control information in OFDM symbols, and K r (l) is the size of the r-th code block used in CG-PUSCH. It is the total number of OFDM symbols transmitted by PUSCH; c UL-SCH α is the number of code blocks transmitted via PUSCH; and α is the value configured by the base station.

11. A terminal in a communication system, the terminal comprising: transceiver; and A controller, coupled to the transceiver, is configured to: The base station receives an indicator indicating whether the Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) message and the configured Grant-Uplink Control Information (CG-UCI) should be jointly encoded. The transmission of the HARQ-ACK information overlaps with the configured Grant-Physical Uplink Shared Channel (CG-PUSCH) transmission; If the indicator indicates that the HARQ-ACK information and the CG-UCI should be jointly encoded, then the joint encoding of the HARQ-ACK information and the CG-UCI is performed. Based on the beta offset value of the HARQ-ACK information, determine the number of modulation symbols for encoding and decoding the combined information bits of the CG-UCI and the HARQ-ACK information; and Based on the determined number of modulation symbols used in the encoding and decoding, uplink data containing the HARQ-ACK information and the CG-UCI is transmitted to the base station on the CG-PUSCH. The beta offset value of the HARQ-ACK information is identified based on the combined number of information bits of the CG-UCI and the HARQ-ACK information.

12. The terminal according to claim 11, wherein, When the number of combined information bits is less than or equal to the threshold, the beta offset value is identified as the first beta offset value, and when the number of combined information bits is greater than the threshold, it is identified as the second beta offset value.

13. The terminal according to claim 11, wherein, The beta offset value is configured by at least one of the higher-layer signaling or beta offset indicator included in the downlink control information associated with the CG-PUSCH.

14. The terminal according to claim 11, wherein, The combined information bits are mapped onto resource elements included in at least one orthogonal frequency division multiplexing (OFDM) symbol, which begins with the first OFDM symbol following the first OFDM symbol carrying the demodulation reference signal (DMRS) for the CG-PUSCH.

15. The terminal according to claim 11, wherein, The number of modulation symbols for encoding and decoding the combined information bits is based on the following equation: Among them, O ACK This corresponds to the number of bits in the HARQ-ACK information, O CG-UCI L is the number of bits corresponding to the CG-UCI. ACK / CG-UCI It is the number of cyclic redundancy check (CRC) bits used for the HARQ-ACK information and the CG-UCI, and It is the beta offset value, and K is the number of subcarriers used for uplink control information in OFDM symbols, and K r (l) is the size of the r-th code block used in CG-PUSCH. It is the total number of OFDM symbols transmitted by PUSCH; c UL-SCH α is the number of code blocks transmitted via PUSCH; and α is the value configured by the base station.

16. A base station in a communication system, the base station comprising: transceiver; and A controller, coupled to the transceiver, is configured to: Send an indicator to the terminal indicating whether the Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) message and the configured Grant-Uplink Control Information (CG-UCI) should be jointly encoded; Identify overlap between the reception of the HARQ-ACK information and the configured Grant-Physical Uplink Shared Channel (CG-PUSCH) reception; When the indicator indicates that the HARQ-ACK information and the CG-UCI are to be jointly encoded, uplink data with the HARQ-ACK information and the CG-UCI on the CG-PUSCH is received from the terminal; and The HARQ-ACK information and the CG-UCI are obtained based on the number of modulation symbols used in encoding and decoding the combined information bits of the CG-UCI and the HARQ-ACK information, determined according to the beta offset value of the HARQ-ACK information. The beta offset value of the HARQ-ACK information is identified based on the combined number of information bits of the CG-UCI and the HARQ-ACK information.

17. The base station according to claim 16, wherein when the number of combined information bits is less than or equal to a threshold, the beta offset value is identified as a first beta offset value, and when the number of combined information bits is greater than the threshold, it is identified as a second beta offset value.

18. The base station according to claim 16, wherein, The beta offset value is configured by at least one of the higher-layer signaling or beta offset indicator included in the downlink control information associated with the CG-PUSCH.

19. The base station according to claim 16, wherein, The combined information bits are mapped onto resource elements included in at least one orthogonal frequency division multiplexing (OFDM) symbol, which begins with the first OFDM symbol following the first OFDM symbol carrying the demodulation reference signal (DMRS) for the CG-PUSCH.

20. The base station according to claim 16, wherein, The number of modulation symbols for encoding and decoding the combined information bits is based on the following equation: Among them, O ACK This corresponds to the number of bits in the HARQ-ACK information, O CG-UCI L is the number of bits corresponding to the CG-UCI. ACK / CG-UCI It is the number of cyclic redundancy check (CRC) bits used for the HARQ-ACK information and the CG-UCI, and It is the beta offset value, and K is the number of subcarriers used for uplink control information in OFDM symbols, and K r (l) is the size of the r-th code block used in CG-PUSCH. It is the total number of OFDM symbols transmitted by PUSCH; c UL-SCH α is the number of code blocks transmitted via PUSCH; and α is the value configured by the base station.

Images