Method and apparatus for frequency domain resource allocation in a wireless communication system

Abstract

The disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The disclosure is applicable to smart services based on 5G communication technologies and IoT-related technologies, such as smart home, smart building, smart city, smart car, connected car, health, digital education, smart retail, security and safety services. A method performed by a terminal in a communication system is provided. The method includes receiving, from a base station, configuration information of a physical uplink control channel, the configuration information including indices of interlaced resources; identifying two interlaced resources based on the configuration information; and transmitting, to the base station, uplink control information on the physical uplink control channel using at least one of the two interlaced resources, wherein the interlaced resources consist of a plurality of resource blocks, and a gap between the plurality of resource blocks is identical.

Description

TECHNICAL FIELD

[0001] The disclosure relates to a wireless communication system. More specifically, the disclosure relates to a method and apparatus for frequency domain resource allocation in a wireless communication system. BACKGROUND

[0002] To meet the demand for wireless data traffic having increased since deployment of 4th-generation (4G) communication systems, efforts have been made to develop an improved 5th-generation (5G) or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a 'Beyond 4G Network' or a 'Post long term evolution (LTE) System'. The 5G communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 60 GHz bands, so as to accomplish higher data rates. To decrease propagation loss of the radio waves and increase the transmission distance, the beamforming, massive multiple-input multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, an analog beam forming, large scale antenna techniques are discussed for use in 5G communication systems. In addition, in 5G communication systems, development for system network improvement is under way based on advanced small cells, cloud radio access networks (RANs), ultra-dense networks, a technology for coordination between cells, a cooperative communication, coordinated multi-points (CoMP), a reception-end interference cancellation and the like. In the 5G system, hybrid frequency shift keying (FSK) and quadrature amplitude modulation (QAM) modulation (FQAM) and sliding window superposition coding (SWSC) as an advanced coding modulation (ACM), and filter bank multi carrier (FBMC), a sparse code multiple access (SCMA), and a full dimensional MIMO (FD-MIMO) are developed for use as an advanced access technology.

[0003] The Internet, which is a human centered connectivity network where humans generate and consume information, is now evolving to the Internet of Things (IoT) where distributed entities, such as things, exchange and process information without human intervention. The Internet of Everything (IoE), which is a combination of the IoT technology and the big data processing technology through connection with a cloud server, has emerged as a new concept. As technology elements, such as "sensing technology", "wired / wireless communication and network infrastructure", "service interface technology", and "security technology" have been demanded for IoT implementation, a sensor network, a machine-to-machine (M2M) communication, machine type communication (MTC), and the like have been researched. Such an IoT environment can provide intelligent Internet technology services by collecting and analyzing data generated among connected things. The IoT can be applied to a variety of fields including smart home, smart building, smart city, smart car or connected cars, smart grid, health care, smart appliances, and advanced medical services.

[0004] In line with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as a sensor network, Machine Type Communication (MTC), and Machine-to-Machine (M2M) communication can be implemented by beamforming, MIMO, and array antennas. It can also be considered to be an example of convergence of the 5G technology and the IoT technology as the above-described Big Data processing technology and the application of a cloud Radio Access Network (RAN) as 5G technologies can be considered examples of the convergence of the 5G technology and the IoT technology.

[0005] In addition, a Licensed Assisted Access (LAA) technology using a non-licensed band has been researched based on the 5G communication system.

[0006] The above information is presented as background information only to assist with an understanding of the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the present disclosure. SUMMARY

[0007] Aspects of the present disclosure are to address at least the above-mentioned problems and / or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the present disclosure is to provide a method and apparatus for frequency domain resource allocation in a wireless communication system.

[0008] Additional aspects will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description and / or can be learned by practice of the presented embodiments.

[0009] According to an aspect of the present disclosure, a method performed by a terminal in a communication system is provided. The method includes receiving, from a base station, configuration information of a physical uplink control channel, the configuration information including indices of interlace resources, identifying two interlace resources based on the configuration information; and transmitting, to the base station, uplink control information on the physical uplink control channel using at least one of the two interlace resources, wherein the interlace resources consist of a plurality of resource blocks, and intervals between the plurality of resource blocks are identical.

[0010] According to another aspect of the present disclosure, a method performed by a base station in a communication system is provided. The method includes identifying two interlace resources for receiving uplink control information, transmitting, to a terminal, configuration information of a physical uplink control channel, the configuration information including indices of interlace resources according to the two interlace resources, receiving, from the terminal, uplink control information on the physical uplink control channel using at least one of the two interlace resources, wherein the interlace resources consist of a plurality of resource blocks, and intervals between the plurality of resource blocks are identical.

[0011] According to another aspect of the disclosure, there is provided a terminal in a communication system, the terminal comprising a transceiver and a controller coupled with the transceiver and configured to: receive, from a base station, configuration information of a physical uplink control channel, the configuration information including indices of interlaced resources, identify two interlaced resources based on the configuration information, and transmit, to the base station, uplink control information on the physical uplink control channel using at least one of the two interlaced resources, wherein the interlaced resources consist of a plurality of resource blocks with a same spacing between the plurality of resource blocks.

[0012] According to another aspect of the disclosure, there is provided a base station in a communication system, the base station comprising a transceiver and a controller coupled with the transceiver and configured to: identify two interlaced resources for receiving uplink control information, transmit, to a terminal, configuration information of a physical uplink control channel, the configuration information including indices of interlaced resources according to the two interlaced resources, and receive, from the terminal, uplink control information on the physical uplink control channel using at least one of the two interlaced resources, wherein the interlaced resources consist of a plurality of resource blocks with a same spacing between the plurality of resource blocks.

[0013] Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in con junction with the annexed drawings, discloses various embodiments of the present disclosure.

[0014] According to the apparatuses and methods of various embodiments of the disclosure, there is provided a method for allocating frequency domain resources of an uplink signal or channel transmitted through an unlicensed band by a terminal, so that a base station and the terminal can efficiently perform communication.

[0015] Effects obtainable from the present disclosure are not limited to what has been described herein above, and other effects that are not described herein will become apparent to those skilled in the art from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and other aspects, features, and advantages of certain embodiments of the present disclosure will be more apparent from the following description taken in conjunction with the accompanying drawings, in which:

[0017] Figure 1 FIG. 1 is a diagram illustrating a wireless communication system according to an embodiment of the present disclosure;

[0018] Figure 2 FIG. 2 is a diagram illustrating a configuration of a base station in a wireless communication system according to an embodiment of the present disclosure;

[0019] Figure 3 FIG. 3 is a diagram illustrating a configuration of a terminal in a wireless communication system according to an embodiment of the present disclosure;

[0020] Figure 4FIG. 1 is a diagram illustrating a configuration of a communication unit in a wireless communication system according to an embodiment of the disclosure;

[0021] Figure 5 FIG. 2 is a diagram illustrating an example of a radio resource region in a wireless communication system according to an embodiment of the disclosure;

[0022] Figure 6 FIG. 3 is a diagram illustrating an example of a channel access procedure in an unlicensed band in a wireless communication system according to an embodiment of the disclosure;

[0023] Figure 7 FIG. 4 is a diagram illustrating another example of a channel access procedure in an unlicensed band in a wireless communication system according to an embodiment of the disclosure;

[0024] Figure 8 FIG. 5 is a diagram illustrating an example of scheduling and feedback in a wireless communication system according to an embodiment of the disclosure;

[0025] FIG. 9A is a diagram illustrating an example of a channel occupancy time and a slot format in a wireless communication system according to an embodiment of the disclosure;

[0026] FIG. 9B is a diagram explaining a method of allocating frequency resources in a wireless communication system according to an embodiment of the disclosure;

[0027] FIG. 9C is a diagram explaining another method of allocating frequency domain resources in a wireless communication system according to an embodiment of the disclosure;

[0028] Figure 10 FIG. 10 is a flowchart of a method of a base station determining allocated frequency domain resources in a wireless communication system according to an embodiment of the disclosure;

[0029] Figure 11 FIG. 11 is a flowchart of a method of a terminal determining allocated frequency domain resources in a wireless communication system according to an embodiment of the disclosure; and

[0030] Figure 12 FIG. 12 is another flowchart of a method of a terminal determining allocated frequency domain resources in a wireless communication system according to an embodiment of the disclosure.

[0031] Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures. DETAILED DESCRIPTION

[0032] Hereinafter, embodiments of the disclosure will be described in detail with reference to the accompanying drawings. In describing the disclosure, if it is determined that the relevant known functions or configurations unnecessarily obscure the disclosure with unnecessary detail, a detailed description thereof will be omitted. Furthermore, the terms described later are terms defined in consideration of their functions in the disclosure, but can be different depending on the intention or custom of the user or operator. Accordingly, they should be defined based on the content of the entire description of the disclosure.

[0033] The following description of the drawings is provided to assist in a comprehensive understanding of various embodiments of the disclosure as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be considered in the context of the entire description. Accordingly, one of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the disclosure. Also, descriptions of well-known functions and constructions can be omitted for clarity and conciseness.

[0034] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but are merely used by the inventor to enable a clear and consistent understanding of the disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the disclosure is provided for illustration purpose only and not for the purpose of limiting the disclosure as defined by the appended claims and their equivalents.

[0035] It should be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component surface" includes reference to one or more of such surfaces.

[0036] Hereinafter, embodiments of the disclosure will be described in detail with reference to the accompanying drawings.

[0037] In explaining the embodiments, the explanation of technical contents well known in the art to which the disclosure pertains and having no direct relation to the disclosure will be omitted. This is to more clearly convey the subject matter of the disclosure to those skilled in the art and is not to be considered as obviating the subject matter of the disclosure by omitting unnecessary description.

[0038] Likewise, in the drawings, the size and relative sizes of some of the constituent elements can be exaggerated, omitted, or simplified for the sake of convenience or clarity. In addition, the size of the respective constituent elements does not completely reflect the actual size thereof. In the drawings, the same reference numerals are used for the same or corresponding elements in different drawings.

[0039] Aspects and features of the present disclosure, and methods for implementing the aspects and features, will be apparent from the detailed description of embodiments, reference being made to the drawings. However, the present disclosure is not limited to the embodiments disclosed below, and it can be implemented in various forms. The matters defined in the description such as detailed construction and elements are provided to assist in a comprehensive understanding of the present disclosure and are merely illustrative. The present disclosure is defined only by the range of claims. Throughout the description, like reference numerals are used to refer to like elements throughout the various figures.

[0040] In this case, it should be understood that each block of the flowchart illustrations, and combinations of blocks in the flowchart illustrations, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart block or blocks. These computer program instructions can also be stored in a computer-usable or computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer- usable or computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks. The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operations to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide operations for implementing the functions specified in the flowchart block or blocks.

[0041] Also, each block of the flowchart illustrations can represent a module, segment, or portion of code, which includes one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the flowcharts. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or the blocks can sometimes be executed in the reverse order, depending upon the involved functions.

[0042] In this case, the term "~unit" as used in the embodiments means, but is not limited to, a software or hardware component such as a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC) that performs certain tasks. However, a "~unit" does not mean a limitation of software or hardware. The term "~unit" can advantageously be configured to reside on the addressable storage medium and configured to execute on one or more processors. Thus, as an example, a "~unit" can include software components, object-oriented software components, class components, and task components, processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functionality provided for in the components and "units" can be combined into fewer components and "units" or further separated into additional components and "units". In addition, the components and "units" can be implemented to operate one or more central processing units (CPUs) of a device or a secure multimedia card. Furthermore, in one embodiment, a "~unit" can include one or more processors.

[0043] A wireless communication system was initially developed to provide voice-oriented services, but it has expanded to, for example, a wideband wireless communication system that provides high-speed and high-quality packet data services as well as communication standards such as Third Generation Partnership Project (3GPP) High Speed Packet Access (HSPA), Long Term Evolution (LTE) or Evolved Universal Terrestrial Radio Access (E-UTRA), LTE-Advanced (LTE-A), 3GPP2 High Rate Packet Data (HRPD), Ultra Mobile Broadband (UMB), and Institute of Electrical and Electronics Engineers (IEEE) 802.16e. In addition, for the 5th generation wireless communication system, a 5G or New Radio (NR) communication standard has been developed.

[0044] In the case of a 5G communication system, various technologies such as retransmission in a code block group (CBG) unit to provide various services and support a high data rate, and a technology capable of transmitting an uplink signal without uplink scheduling information (e.g., grant-free uplink transmission) will be introduced. Therefore, in the case of performing 5G communication through an unlicensed band, it is necessary to consider a more efficient channel access procedure of various variables.

[0045] In a wireless communication system including a 5th generation (5G) communication system, at least one of enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low latency communication (URLLC) services can be provided to a terminal. The above-described services can be provided to the same terminal during the same time period. In one embodiment, eMBB can be a service aiming at high-speed transmission of large-capacity data, mMTC can be a service aiming at minimizing terminal power and accessing a plurality of terminals, and URLLC can be a service aiming at high reliability and low latency, but the above-described services are not limited thereto. The three services can be important scenarios in an LTE system or a post-LTE 5G / NR (New Radio or Next Radio) system, but the services are not limited to the above-described examples. In addition, the above-described services of the 5G system are exemplary, and possible services of the 5G system are not limited to the above-described examples. In addition, a system providing a URLLC service can be referred to as a URLLC system, and a system providing an eMBB service can be referred to as an eMBB system. In addition, the terms "service" and "system" can be used interchangeably or mixedly.

[0046] Hereinafter, a base station is a subject that performs resource allocation to a terminal, and it can include at least one of an eNodeB, a NodeB, a base station (BS), a radio access unit, a base station controller, and a node on a network. A terminal can include at least one of a user equipment (UE) capable of performing a communication function, a mobile station (MS), a cellular phone, a smart phone, a computer, and a multimedia system. In the present disclosure, a downlink (DL) is a radio transmission path of a signal transmitted from a base station to a terminal, and an uplink (UL) is a radio transmission path of a signal transmitted from a terminal to a base station. Hereinafter, although an LTE or LTE-A system is exemplified in the embodiments of the present disclosure, in order to explain the methods and apparatuses proposed in the present disclosure, the terms "physical channel" and "signal" in the LTE or LTE-A system in the related art can be used. Embodiments of the present disclosure can also be applied to other communication systems having a technical background or channel type similar to that of the mobile communication system described in the present disclosure. For example, a fifth generation (5G) mobile communication technology (5G, New Radio, and NR) can be included. Further, the embodiments of the present disclosure can also be applied to other communication systems through partial modification within the scope that does not greatly deviate from the scope of the present disclosure by the judgment of one skilled in the art.

[0047] In a 5G system or a New Radio (NR) system, which is a representative example of a broadband wireless communication system, a downlink (DL) adopts an Orthogonal Frequency Division Multiplexing (OFDM) scheme, and an uplink (UL) adopts all of an OFDM, a Single Carrier Frequency Division Multiple Access (SC-FDMA), and a DFT-spread OFDM (DFT-s-OFDM) scheme. According to a multiple access scheme, data or control information of a corresponding user can be distinguished from each other by allocating and operating time-frequency domain resources in which the data or control information is transmitted, to avoid time-frequency resources from overlapping each other, i.e., to establish orthogonality between time-frequency resources.

[0048] The NR system adopts a Hybrid Automatic Repeat Request (HARQ) scheme in which a physical layer retransmits data if a decoding failure occurs during initial transmission of corresponding data. According to the HARQ scheme, if a receiver has not accurately decoded data, the receiver can enable a transmitter to retransmit corresponding data on a physical layer by transmitting information (e.g., a Negative Acknowledgement (NACK)) for notifying the transmitter of a decoding failure. The receiver can combine data retransmitted by the transmitter with data in which a decoding failure has occurred before, to improve data reception performance. In addition, according to the HARQ scheme, if the receiver has accurately decoded data, the receiver can transmit information (e.g., an Acknowledgement (ACK)) for notifying the transmitter of a decoding success, so that the transmitter transmits new data.

[0049] In the following description, terms designating constituent elements of signals, channels, control information, network entities, and devices are exemplified for convenience of explanation. Accordingly, the disclosure is not limited to the terms described later, but other terms having equivalent technical meanings can be used.

[0050] Although various embodiments of the disclosure will be described using terms used in some communication standards (e.g., the 3rd Generation Partnership Project (3GPP)), they are only for exemplary explanation, and various embodiments of the disclosure can be easily modified and applied to other communication systems.

[0051] Although various embodiments of the disclosure are described based on the NR system, the content of the disclosure is not limited to the NR system, but can be applied to various wireless communication systems such as LTE, LTE-A, LTE-A-Pro, and 5G. In addition, although the content of the disclosure is described for a system and apparatus for transmitting and receiving a signal using an unlicensed band, the content of the disclosure can also be applied to a system operating in an unlicensed band.

[0052] In the disclosure, higher layer signaling or a higher signal can be a method of transmitting a signal from a base station to a terminal using a downlink data channel of a physical layer or transmitting a signal from a terminal to a base station using an uplink data channel of a physical layer, and it can include at least one of a transmission method of a signal transmitted through radio resource control (RRC) signaling, packet data convergence protocol (PDCP) signaling, and a medium access control (MAC) control element (CE). In addition, the higher layer signaling or the higher signal can include system information commonly transmitted to a plurality of terminals, for example, a system information block other than a master information block transmitted through a physical broadcast channel (PBCH). In this case, the MIB can also be included in the higher layer signaling.

[0053] Figure 1 A wireless communication system according to an embodiment of the disclosure is illustrated.

[0054] Reference Figure 1 The base station 110, the terminal 120, and the terminal 130 are exemplified as some nodes using a radio channel in a wireless communication system. Although Figure 1 Although only one base station is illustrated in FIG. 1, the wireless communication system can further include other base stations identical or similar to the base station 110.

[0055] The base station 110 is a network infrastructure that provides radio access to the terminals 120 and 130. The base station 110 has a coverage area defined as a certain geographical area based on a distance at which the base station 110 can transmit a signal. In addition to a base station, the base station 110 can be referred to as an access point (AP), an eNodeB (eNB), a gNodeB (gNB), a fifth generation node (5G node), a wireless point, a transmission / reception point (TRP), or other terms having the same technical meaning.

[0056] Each of the terminals 120 and 130 is a device used by a user, and it performs communication with the base station 110 through a radio channel. At least one of the terminals 120 and 130 can operate without user involvement, depending on the situation. That is, at least one of the terminals 120 and 130 is a device performing machine type communication (MTC), and it can not be carried by a user. In addition to a terminal, each of the terminals 120 and 130 can be referred to as a user equipment (UE), a mobile station, a subscriber station, a remote terminal, a wireless terminal, a user device, or other terms having the same technical meaning.

[0057] The wireless communication environment 100 can include wireless communication in an unlicensed band. The base station 110, the terminal 120, and the terminal 130 can transmit and receive radio signals in an unlicensed band (e.g., 5 to 7 GHz or 64 to 71 GHz). In the unlicensed band, a cellular communication system and another communication system (e.g., a wireless local area network (WLAN)) can coexist. In order to guarantee fairness between the two communication systems, in other words, in order to prevent any one system from monopolizing a channel, the base station 110, the terminal 120, and the terminal 130 can perform a channel access procedure for the unlicensed band. As an example of the channel access procedure for the unlicensed band, the base station 110, the terminal 120, and the terminal 130 can perform listen before talk (LBT).

[0058] The base station 110, the terminal 120, and the terminal 130 can transmit and receive radio signals in a millimeter wave (mmWave) band (e.g., 28 GHz, 30 GHz, 38 GHz, and 60 GHz). In this case, in order to improve channel gain, the base station 110, the terminal 120, and the terminal 130 can perform beamforming. Here, beamforming can include transmission beamforming and reception beamforming. That is, the base station 110, the terminal 120, and the terminal 130 can give directionality to a transmitted signal or a received signal. To this end, the base station 110, the terminal 120, and the terminal 130 can select a serving beam (112, 113, 121, 131) through a beam search or a beam management procedure. After selecting the serving beam, subsequent communication can be performed through a resource in a quasi co-location (QCL) relationship with a resource in which the serving beam has been transmitted.

[0059] Figure 2 FIG. 1 illustrates a configuration of a base station in a wireless communication system according to an embodiment of the disclosure.

[0060] Figure 2 The configuration illustrated in FIG. 1 can be understood as a configuration of the base station 110. The term “~ unit” or “~er” as used hereinafter can mean a unit processing at least one function or operation, and it can be implemented by software, hardware, or a combination of software and hardware.

[0061] Referring to FIG. 1, Figure 2 The base station includes a wireless transceiver 210, a backhaul communication unit 220, a memory 230, and a controller 240.

[0062] The wireless transceiver 210 performs functions for transmitting and receiving signals through a radio channel. For example, the wireless transceiver 210 performs a conversion function between a baseband signal and a bit string according to a physical layer standard of a system. For example, during data transmission, the wireless transceiver 210 creates complex symbols by encoding and modulating a transmitted bit string. Further, during data reception, the wireless transceiver 210 recovers a received bit string by demodulating and decoding a baseband signal.

[0063] Further, the wireless transceiver 210 up-converts a baseband signal into a radio frequency (RF) band signal to transmit the RF band signal through an antenna, and it down-converts an RF band signal received through the antenna into a baseband signal. To this end, the wireless transceiver 210 can include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC), and an analog-to-digital converter (ADC). Further, the wireless transceiver 210 can include a plurality of transmission / reception paths. Further, the wireless transceiver 210 can include at least one antenna array composed of a plurality of antenna elements.

[0064] From a hardware point of view, the wireless transceiver 210 can be composed of a digital unit and an analog unit, and the analog unit can be composed of a plurality of sub-units according to operating power and operating frequency. The digital unit can be implemented by at least one processor (for example, a digital signal processor (DSP)).

[0065] As described above, the wireless transceiver 210 transmits and receives signals. Accordingly, all or part of the wireless transceiver 210 can be referred to as a transmitter, a receiver, or a transceiver. Further, in the following description, this can mean that transmission and reception performed through a radio channel include the above-described processes performed by the wireless transceiver 210. According to one embodiment, the wireless transceiver 210 can include at least one transceiver.

[0066] The backhaul communication unit 220 provides an interface for performing communication with other nodes in a network. That is, the backhaul communication unit 220 converts a bit string transmitted from the base station to another node, for example, another access node, another base station, a higher node, or a core network, and it converts a physical signal received from other nodes into a bit string.

[0067] The memory 230 stores data of a basic program, an application program, and configuration information for base station operation therein. The memory 230 can be composed of a volatile memory, a non-volatile memory, or a combination of a volatile memory and a non-volatile memory. Further, the memory 230 provides stored data according to a request from the controller 240. According to one embodiment, the memory 230 can include a memory.

[0068] The controller 240 controls overall operations of the base station. For example, the controller 240 transmits and receives signals through the wireless transceiver 210 or the backhaul communication unit 220. Also, the controller 240 records and writes data in the memory 230. Also, the controller 240 can perform a protocol stack function required in a communication standard. According to another implementation, the protocol stack can be included in the wireless transceiver 210. According to an embodiment, the controller 240 can include at least one processor.

[0069] According to various embodiments, the controller 240 can perform a control operation to cause the base station to perform operations according to various embodiments to be described later. For example, the controller 240 can perform a channel access procedure of an unlicensed band. For example, the transceiver (e.g., the wireless transceiver 210) can receive a signal transmitted in the unlicensed band, and the controller 240 can determine whether the unlicensed band is in an idle state by comparing the strength of the received signal with a threshold value predefined or determined by a value of a function with a bandwidth as a factor. For example, the controller 240 can transmit a control signal to a terminal through the transceiver, or it can receive a control signal from the terminal. The controller 240 can determine a result of transmitting a signal to the terminal based on the control signal or a data signal received from the terminal. For example, the controller 240 can maintain or change a contention window value of the channel access procedure (hereinafter referred to as "performing contention window adjustment"). According to various embodiments, the controller 240 can determine a reference time slot in order to acquire a transmission result of the contention window adjustment. The controller 240 can determine a reference control channel for the contention window adjustment in the reference time slot. If it is determined that the unlicensed band is in an idle state, the controller 240 can occupy the channel.

[0070] Figure 3 FIG. 13 illustrates a configuration of a terminal in a wireless communication system according to an embodiment of the disclosure. Figure 3 The configuration illustrated in FIG. 13 can be understood as a configuration of the terminal 120. The term "~ unit" or "~er" as used hereinafter can mean a unit for processing at least one function or operation, and it can be implemented by software, hardware, or a combination of software and hardware.

[0071] Referring to Figure 3 , the terminal includes a transceiver 310, a memory 320, and a controller 330.

[0072] The transceiver 310 performs functions of transmitting and receiving signals through a radio channel. For example, the transceiver 310 performs a conversion function between a baseband signal and a bit string according to a physical layer standard of a system. For example, during data transmission, the transceiver 310 creates complex symbols by encoding and modulating a transmitted bit string. Also, during data reception, the transceiver 310 recovers a received bit string through demodulation and decoding of a baseband signal. In addition, the transceiver 310 up-converts a baseband signal into an RF band signal to transmit the RF band signal through an antenna, and it down-converts an RF band signal received through an antenna into a baseband signal. For example, the transceiver 310 can include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, and an ADC.

[0073] In addition, the transceiver 310 can include a plurality of transmission / reception paths. Also, the transceiver 310 can include at least one antenna array composed of a plurality of antenna elements. From a hardware point of view, the transceiver 310 can be composed of digital circuits and analog circuits (e.g., a radio frequency integrated circuit (RFIC)). Here, the digital circuits and the analog circuits can be implemented by one package. In addition, the transceiver 310 can include a plurality of RF chains. Also, the transceiver 310 can perform beamforming.

[0074] As described above, the transceiver 310 transmits and receives signals. Accordingly, all or part of the transceiver 310 can be referred to as a transmitter or a receiver. Also, in the following description, this can mean that transmission and reception performed through a radio channel include the above-described processes performed by the transceiver 310. According to one embodiment, the transceiver 310 can include at least one transceiver.

[0075] The memory 320 stores data of a basic program for terminal operation, an application program, and configuration information therein. The memory 320 can be composed of a volatile memory, a non-volatile memory, or a combination of the volatile memory and the non-volatile memory. In addition, the memory 320 provides stored data according to a request from the controller 330. According to one embodiment, the memory 320 can include a memory.

[0076] The controller 330 controls overall operations of the terminal. For example, the controller 330 transmits and receives signals through the transceiver 310. Also, the controller 330 records and writes data in the memory 320. In addition, the controller 330 can perform a protocol stack function required in a communication standard. To this end, the controller 330 can include at least one processor or microprocessor, or it can be a part of the processor. According to one embodiment, the controller 330 can include at least one processor. In addition, according to one embodiment, a part of the transceiver 310 and / or the controller 330 can be referred to as a communication processor (CP).

[0077] According to various embodiments, the controller 330 can perform a control operation so that the terminal performs operations according to various embodiments which will be described later. For example, the controller 330 can receive a downlink signal (downlink control signal or downlink data) transmitted by a base station through a transceiver (e.g., the transceiver 310). For example, the controller 330 can determine a result of transmitting the downlink data. The transmission result can include feedback information on ACK, NACK, and DTX of the transmitted downlink signal. In the present disclosure, the transmission result can be referred to as various terms such as reception status, reception result, decoding result, and HARQ-ACK information of the downlink signal. For example, the controller 330 can transmit an uplink signal to the base station as a response signal to the downlink signal through the transceiver. The uplink signal can explicitly or implicitly include the result of transmitting the downlink signal.

[0078] The controller 330 can perform a channel access procedure of an unlicensed band. For example, the transceiver (e.g., the transceiver 310) can receive a signal transmitted in the unlicensed band, and the controller 330 can determine whether the unlicensed band is in an idle state by comparing the strength of the received signal with a threshold value predefined or determined by the value of a function with a bandwidth as a factor. The controller 330 can perform an access procedure of the unlicensed band to transmit a signal to the base station.

[0079] Figure 4 FIG. 1 illustrates a configuration of a communication unit in a wireless communication system according to an embodiment of the present disclosure. Figure 4 FIG. 1 illustrates a configuration of a communication unit in a wireless communication system according to an embodiment of the present disclosure. Figure 2 FIG. 1 illustrates a configuration of a communication unit in a wireless communication system according to an embodiment of the present disclosure. Figure 3 FIG. 1 illustrates a configuration of a communication unit in a wireless communication system according to an embodiment of the present disclosure. Figure 4 FIG. 1 illustrates a configuration of a communication unit in a wireless communication system according to an embodiment of the present disclosure. Figure 2 FIG. 1 illustrates a configuration of a communication unit in a wireless communication system according to an embodiment of the present disclosure. Figure 3 FIG. 1 illustrates a configuration of a communication unit in a wireless communication system according to an embodiment of the present disclosure.

[0080] Referring to FIG. 4, Figure 4 The wireless transceiver 210 or the transceiver 310 includes an encoder and modulator 402, a digital beamformer 404, a plurality of transmission paths 406-1 to 406-N, and an analog beamformer 408.

[0081] The encoder and modulator 402 perform channel coding. For such channel coding, at least one of a low-density parity-check (LDPC) code, a convolutional code, and a polar code. The encoder and modulator 402 create modulation symbols by performing constellation mapping.

[0082] The digital beamformer 404 performs beamforming on the digital signal (e.g., modulated symbol). To this end, the digital beamformer 404 multiplies the modulated symbol by a beamforming weight. Here, the beamforming weight serves to change the level and phase of the signal, and can be referred to as a precoding matrix or precoder. The digital beamformer 404 outputs the modulated symbol on which the digital beamforming is performed to the plurality of transmission paths 406-1 to 406-N. In this case, the modulated symbol can be multiplexed according to a multiple-input multiple-output (MIMO) transmission technique, or the same modulated symbol can be provided to the plurality of transmission paths 406-1 to 406-N.

[0083] The plurality of transmission paths 406-1 to 406-N converts the digital signal on which the digital beamforming is performed into an analog signal. To this end, each of the plurality of transmission paths 406-1 to 406-N can include an inverse fast Fourier transform (IFFT) operation unit, a cyclic prefix (CP) insertion unit, a DAC, and an up-conversion unit. The CP insertion unit is used for an orthogonal frequency division multiplexing (OFDM) scheme, and can be omitted if a different physical layer scheme (e.g., filter bank multi-carrier (FBMC)) is applied. That is, the plurality of transmission paths 406-1 to 406-N provide independent signal processes with respect to the plurality of streams created by the digital beamforming. However, according to an implementation scheme, some constituent elements of the plurality of transmission paths 406-1 to 406-N can be shared.

[0084] The analog beamformer 408 performs beamforming on the analog signal. To this end, the analog beamformer 408 multiplies the analog signal by a beamforming weight. Here, the beamforming weight serves to change the level and phase of the signal. Specifically, the analog beamformer 408 can be variously configured according to a connection structure between the plurality of transmission paths 406-1 to 406-N and the antenna. For example, each of the plurality of transmission paths 406-1 to 406-N can be connected to one antenna array. As another example, the plurality of transmission paths 406-1 to 406-N can be connected to one antenna array. As still another example, the plurality of transmission paths 406-1 to 406-N can be adaptively connected to one antenna array, or they can be connected to two or more antenna arrays.

[0085] In the 5G system, considering various services and requirements, it is necessary to flexibly define a frame structure. For example, the corresponding service can have a different subcarrier spacing according to the requirement. The 5G communication system currently supports a plurality of subcarrier spacings, and the subcarrier spacing can be determined by Mathematical Expression 1.

[0086] [Mathematical Expression 1]

[0087] Δf = f0 2 m

[0088] In Mathematical Expression 1, f0denotes a basic subcarrier spacing of a system, m denotes a scaling factor of an integer, and Δf denotes a subcarrier spacing. For example, if f0is 15 kHz, a set of subcarrier spacings that the 5G communication system can have can consist of one of 3.75 kHz, 7.5 kHz, 15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz, and 480 kHz. The set of available subcarrier spacings can be different depending on a frequency band. For example, in a frequency band equal to or lower than 6 GHz, 3.75 kHz, 7.5 kHz, 15 kHz, 30 kHz, and 60 kHz can be used, and in a frequency band higher than 6 GHz, 60 kHz, 120 kHz, and 240 kHz can be used.

[0089] In various embodiments, the duration of a corresponding OFDM symbol can be different depending on a subcarrier spacing constituting the OFDM symbol. This is because the subcarrier spacing and the OFDM symbol duration are in a reciprocal relationship with each other according to the characteristics of the OFDM symbol. For example, if the subcarrier spacing is increased by two times, the symbol duration is reduced to 1 / 2, and conversely, if the subcarrier spacing is reduced to 1 / 2, the symbol duration is extended by two times.

[0090] Figure 5 FIGURE 1 illustrates an example of a radio resource region in a wireless communication system according to an embodiment of the disclosure. In various embodiments, the radio resource region can include a structure of a time-frequency region. In various embodiments, the wireless communication system can include an NR communication system.

[0091] Reference Figure 5 In the radio resource region, the horizontal axis denotes a time domain, and the vertical axis denotes a frequency domain. In the time domain, a minimum transmission unit can be an orthogonal frequency division multiplexing (OFDM) and / or a discrete Fourier transform (DFT)-spread OFDM (DFT-s-OFDM) symbol, and N symbOne OFDM symbol 102 and / or DFT-s-OFDM symbol 501 can be aggregated to constitute one slot 502. In various embodiments, the OFDM symbol can include a symbol in a case where a signal is transmitted / received using an OFDM multiplexing scheme, and the DFT-s-OFDM symbol can include a symbol in a case where a signal is transmitted / received using a DFT-s-OFDM or single carrier frequency division multiple access (SC-FDMA) multiplexing scheme. Hereinafter, in the disclosure, an embodiment of the OFDM symbol will be described for convenience of explanation, but such an embodiment is also applicable to an embodiment of the DFT-s-OFDM symbol. Also, although an embodiment of the disclosure will be described for convenience of explanation with respect to the OFDM symbol, such an embodiment can also be applicable to an embodiment of the DFT-s-OFDM symbol. Also, although an embodiment of the disclosure will be described for convenience of explanation with respect to downlink signal transmission and reception, such an embodiment can also be applicable to an embodiment of uplink signal transmission and reception.

[0092] If a subcarrier spacing (SCS) is 15 kHz, one slot 502 constitutes one subframe 503, and the duration of the slot 502 or the subframe 503 can be 1 ms, contrary to that shown in FIG. 1B. Figure 5 SC BW In various embodiments, the number of slots 502 constituting one subframe 503 and the duration of the slot 502 can differ according to the subcarrier spacing. For example, if the subcarrier spacing is 30 kHz, two slots 502 can constitute one subframe 503. In this case, the duration of the slot 502 is 0.5 ms, and the duration of the subframe 503 is 1 ms. Also, a radio frame 504 can be a time domain interval consisting of 10 subframes. In the frequency domain, the minimum transmission unit is a subcarrier, and a carrier bandwidth to which a resource grid is configured can consist of a total of Nscarr subcarriers 505.

[0093] However, the subcarrier spacing, the number of slots 502 included in the subframe 503, the duration of the slot 502, and the duration of the subframe 503 can be variably applied. For example, in the case of an LTE system, the subcarrier spacing is 15 kHz, and two slots constitute one subframe 503. In this case, the duration of the slot 502 can be 0.5 ms, and the duration of the subframe 503 can be 1 ms. In another example, in the case of an NR system, the subcarrier spacing m can be one of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz, and according to the subcarrier spacing m, the number of slots included in one subframe can be 1, 2, 4, 8, or 16.

[0094] ​In the time-frequency domain, a basic unit of a resource can be a resource element (RE) 506, and the resource element 506 can be expressed by an OFDM symbol index and a subcarrier index. In the LTE system, a resource block (RB) (or a physical resource block (PRB)) can be defined by N symb consecutive OFDM symbols in the time domain and N SC RB consecutive subcarriers in the frequency domain. The number of symbols included in one RB can be N symb = 14, the number of subcarriers can be N SC RB = 12, and the number of RBs (N RB ) can vary according to the bandwidth of the system transmission band. In the NR system, a resource block (RB) 507 can be defined by N SC RB consecutive subcarriers 508. The number of subcarriers can be N SC RB = 12. The frequency domain can include a common resource block (CRB), and a physical resource block (PRB) can be defined in a bandwidth part (BWP) in the frequency domain. The number of CRBs and PRBs can be determined differently according to the subcarrier spacing.

[0095] Downlink control information can be transmitted in the initial N OFDM symbol(s) within a slot. Generally, the number can be N = {1, 2, 3}, and the terminal can be configured by the base station the number of symbols in which the downlink control information can be transmitted by higher layer signaling. Further, according to the amount of control information to be transmitted in the current slot, the base station can change the number of symbols per slot in which the downlink control information can be transmitted in the slot, and it can transmit information on the number of symbols to the terminal on a separate downlink control channel.

[0096] In the NR and / or LTE system, scheduling information on downlink data or uplink data can be transmitted from the base station to the terminal through downlink control information (DCI). In various embodiments, the DCI can be defined according to various formats, and each format can indicate whether the DCI includes scheduling information on uplink data (e.g., UL grant) or scheduling information on downlink data (DL grant), whether the DCI is compact DCI or fallback DCI having small size control information, whether spatial multiplexing using multiple antennas is applied, and / or whether the DCI is DCI for power control.

[0097] For example, a DCI format (e.g., DCI format 1_0 of NR) as scheduling control information on downlink data (DL grant) can include at least one of the following control information.

[0098] - Control information (DCI) format identifier: This is an identifier for identifying a DCI format.

[0099] - Frequency domain resource allocation: This indicates RBs allocated for data transmission.

[0100] - Time domain resource allocation: This indicates slots and symbols allocated for data transmission.

[0101] - VRB-to-PRB mapping: This indicates whether to apply a virtual resource block (VRB) mapping scheme.

[0102] - Modulation and coding scheme (MCS): This indicates a modulation scheme used for data transmission and a size of a transport block (TB) that is data intended to be transmitted.

[0103] - New data indicator: This indicates whether HARQ is an initial transmission or a retransmission.

[0104] - Redundancy version: This indicates a redundancy version of HARQ.

[0105] - HARQ process number: This indicates a process number of HARQ.

[0106] - PDSCH allocation information (downlink assignment index): This indicates a number of PDSCH reception results (e.g., a number of HARQ-ACKs) that will be reported from a terminal to a base station.

[0107] - Transmit power control (TPC) command for physical uplink control channel (PUCCH): This indicates a transmit power control command for a PUCCH that is an uplink control channel.

[0108] - PUCCH resource indicator: This indicates a PUCCH resource used for reporting HARQ-ACKs including reception results of PDSCHs configured through a corresponding DCI.

[0109] - PUCCH transmission timing indicator (PDSCH-to-HARQ_feedback timing indicator): This indicates slot or symbol information in which a PUCCH for HARQ-ACK reporting including reception results of PDSCHs configured through a corresponding DCI should be transmitted.

[0110] The DCI can be transmitted on a physical downlink control channel (PDCCH) through a channel coding and modulation process, i.e., a downlink physical control channel (or control information, hereinafter used interchangeably) or an enhanced PDCCH (EPDCCH) (or enhanced control information, hereinafter used interchangeably). Hereinafter, the transmission / reception of the PDCCH or the EPDCCH can be understood as the transmission / reception of the DCI on the PDCCH or the EPDCCH, and the transmission / reception of a physical downlink shared channel (PDSCH) can be understood as the transmission / reception of downlink data on the PDSCH.

[0111] In various embodiments, a cyclic redundancy check (CRC) scrambled with a specific radio network temporary identifier (RNTI) (or terminal identifier (C-RNTI)) independent of each terminal can be added to the DCI, and the DCI for each terminal can be channel-encoded and then configured and transmitted on an independent PDCCH. In the time domain, the PDCCH can be transmitted on a control channel transmission interval. In the frequency domain, the PDCCH mapping position can be determined by at least an identifier (ID) of each terminal, and the PDCCH mapping position can be transmitted in the entire system transmission band or in a configured band of the system transmission band. Further, in the frequency domain, the PDCCH mapping position can be configured by higher layer signaling.

[0112] Downlink data can be transmitted on a physical downlink shared channel (PDSCH) that is a physical channel for transmitting downlink data. The PDSCH can be transmitted after a control channel transmission interval, and in the frequency domain, scheduling information such as a PDSCH mapping position and a PDSCH modulation scheme can be determined based on the DCI transmitted on the PDCCH.

[0113] Through a modulation and coding scheme (MCS) in the control information constituting the DCI, the base station can inform the terminal of a modulation scheme applied to the PDSCH to be transmitted and a transport block size (TBS) of data to be transmitted. In various embodiments, the MCS can consist of 5 bits or more bits or less bits. The TBS corresponds to the size of data (transport block (TB)) that the base station intends to transmit before applying channel coding for error correction to the TB.

[0114] In the NR system, modulation schemes supported for uplink and downlink data transmission can include at least one of quadrature phase shift keying (QPSK), 16 quadrature amplitude modulation (16QAM), 64QAM, and 256QAM, and the corresponding modulation order Q mIt can be 2, 4, 6, and 8. That is, in the case of QPSK modulation, 2 bits can be transmitted per symbol, and in the case of 16QAM modulation, 4 bits can be transmitted per symbol. Further, in the case of 64QAM modulation, 6 bits can be transmitted per symbol, and in the case of 256QAM modulation, 8 bits can be transmitted per symbol. Further, according to system modification, a modulation scheme on 256QAM can be used.

[0115] In the case of a system performing communication in an unlicensed band, a communication device (base station or terminal) intending to transmit a signal through the unlicensed band can perform a channel access procedure or listen before talk (LBT) on the unlicensed band intending to perform communication before transmitting the signal, and if it is determined that the unlicensed band is in an idle state according to the channel access procedure, the communication device can perform signal transmission by accessing the unlicensed band. If it is determined that the unlicensed band is not in an idle state according to the performed channel access procedure, the communication device can not perform signal transmission.

[0116] The channel access procedure in the unlicensed band can be distinguished depending on whether the start time of the channel access procedure of the communication device is fixed (frame-based equipment (FBE)) or variable (load-based equipment (LBE)). In addition to the start time of the channel access procedure, it can be determined whether the communication device is an FBE device or an LBE device depending on whether the transmission / reception structure of the communication device has a cycle or does not have the cycle. Here, the fact that the start time of the channel access procedure is fixed means that the channel access procedure of the communication device can be started periodically according to a pre-defined cycle or a cycle declared or configured by the communication device. As another example, the fact that the start time of the channel access procedure is fixed can mean that the transmission or reception structure of the communication device has a cycle. Here, the fact that the start time of the channel access procedure is variable means that the channel access procedure of the communication device can start at any time when the communication device intends to transmit a signal through the unlicensed band. As still another example, the fact that the start time of the channel access procedure is variable means that the transmission or reception structure of the communication device does not have a cycle, but it can be determined as needed.

[0117] Hereinafter, a channel access procedure (hereinafter, a traffic-based channel access procedure or an LBE-based channel access procedure) in the case where the start time of the channel access procedure of the communication device is variable (load-based equipment (LBE)) will be described.

[0118] The channel access procedure in the unlicensed band can include a procedure of determining an idle state of the unlicensed band by measuring a signal strength received through the unlicensed band for a fixed time or a time calculated according to a pre-defined rule (for example, a time calculated by at least one random value selected by a base station or a terminal), and comparing the measured signal strength with a pre-defined threshold or a threshold calculated by a function which determines a strength level of a received signal according to at least one variable among a channel bandwidth, a signal bandwidth from which a signal intended to be transmitted is transmitted, and / or a transmission power strength.

[0119] For example, the communication device can measure the signal strength Xms (for example, 25 ms) immediately before the time at which the signal is transmitted, and if the measured signal strength is lower than the pre-defined or calculated threshold T (for example, -72 dBm), the communication device can determine that the unlicensed band is in an idle state, and it can transmit the configured signal. In this case, the maximum time in which continuous signal transmission can be made after the channel access procedure can be limited depending on the maximum channel occupancy time which is defined for each unlicensed band for each country, region, or band, and the maximum time can also be limited depending on the type of the communication device (for example, a base station or a terminal, or a master device or a slave device). For example, in the case of Japan, in the 5 GHz unlicensed band, a base station or a terminal can transmit a signal by occupying a channel with respect to the unlicensed band which is determined to be in an idle state for a maximum time of 4 ms after performing a channel access procedure without performing an additional channel access procedure.

[0120] More specifically, in the case in which a base station or a terminal intends to transmit a downlink or uplink signal using an unlicensed band, the channel access procedure which can be performed by the base station or the terminal can be distinguished into at least the following types.

[0121] - Type 1: It transmits an uplink / downlink signal after performing a channel access procedure of a variable time.

[0122] - Type 2: It transmits an uplink / downlink signal after performing a channel access procedure of a fixed time.

[0123] - Type 3: It transmits an uplink / downlink signal without performing an LBT procedure in which a channel occupancy is determined by another node in a channel access procedure.

[0124] A transmission device (e.g., a base station or a terminal) intending to transmit a signal in an unlicensed band can determine a type of a channel access procedure according to a kind of a signal to be transmitted. In the third generation partnership project (3GPP), LBT procedures as a channel access scheme can be classified into four types. The four types can include a first type of not performing LBT, a second type of performing LBT without a random backoff, a third type of performing LBT through a random backoff in a fixed size contention window, and a fourth type of performing LBT through a random backoff in a variable size contention window. According to an embodiment, in the case of Type 1, the third and fourth types can be exemplified, and in the case of Type 2, the second type can be exemplified. Further, in the case of Type 3, the first type can be exemplified.

[0125] In the present disclosure, for convenience of explanation, it can be assumed that the transmission device is a base station, and the transmission device and the base station can be used interchangeably.

[0126] For example, if the base station intends to transmit a downlink signal including a downlink data channel in an unlicensed band, the base station can perform a channel access procedure of Type 1. Further, if the base station intends to transmit a downlink signal not including a downlink data channel in an unlicensed band, for example, if the base station intends to transmit a synchronization signal or a downlink control channel, the base station can perform a channel access procedure of Type 2, and the base station can transmit the downlink signal.

[0127] In this case, the type of the channel access procedure can be determined according to a transmission interval of a signal intended to be transmitted in the unlicensed band, a size of a time or interval in which the unlicensed band is occupied and used. In general, a time in which the channel access procedure is performed in Type 1 can be longer than a time in which the channel access procedure is performed in Type 2. Therefore, if the communication device intends to transmit a signal for a short duration or a time equal to or shorter than a reference time (e.g., X ms or Y symbols), a channel access procedure of Type 2 can be performed. In contrast, if the communication device intends to transmit a signal for a long duration or a time exceeding the reference time (e.g., X ms or Y symbols), a channel access procedure of Type 1 can be performed. In other words, according to a time of use of the unlicensed band, different types of channel access procedures can be performed.

[0128] If a transmission device performs a Type 1 channel access procedure according to at least one of the above references, the transmission device intending to transmit signals in an unlicensed frequency band can determine the channel access priority category (or channel access priority) based on the Quality of Service Category Identifier (QCI) of the signal intended to be transmitted in the unlicensed frequency band, and the transmission device can perform the channel access procedure using at least one of the predefined configuration values ​​relative to the determined channel access priority category as shown in Table 1. Table 1 below shows the mapping relationship between channel access priority categories and QCIs.

[0129] For example, QCI 1, 2, or 4 can represent the QCI value of a service, such as conversational voice, conversational video (live streaming), or non-conversational video (buffered streaming). If the transmission device intends to transmit a signal for a service that does not match the QCI in Table 1 in an unlicensed frequency band, it can select the QCI closest to the QCI in Table 1, and the transmission device can select the channel access priority category of the selected QCI.

[0130] Table 1

[0131] Channel access priority QCI 1 1,3,5,65,66,69,70 2 2,7 3 4,6,8,9 4 -

[0132] In various embodiments, the parameter values ​​for the channel access priority category (e.g., a set CW of contention window values ​​or sizes based on the delay duration of the determined channel access priority p) are... p And the minimum value of the competition window, CW min,p and maximum value CW max,p And the maximum channel occupancy duration T mcot,p The parameters can be determined as shown in Table 2. Table 2 shows the parameter values ​​for the channel access priority category in the downlink case.

[0133] Figure 6 This diagram illustrates an example of a channel access procedure in an unlicensed frequency band in a wireless communication system according to an embodiment of the present disclosure. The case where a base station performs a channel access procedure occupying an unlicensed frequency band will be described. Figure 1 Base station 110 is exemplified as a base station.

[0134] Reference Figure 6 Base stations intending to transmit downlink signals in unlicensed frequency bands can do so in T... f +m p *T sl The minimum time (e.g., Figure 6 The channel access procedure for the unlicensed frequency band is performed within the delay duration T. If the base station intends to perform the channel access procedure with channel access priority category 3 (p=3), then the delay duration T required to perform the channel access procedure is determined. f +m p*T sl You can use m p =3 pairs of T f +m p *T sl Configure the size of T. Here, T f For a fixed value of 16ms (e.g., Figure 6 The duration of 610), and the initial time T sl It should be in an idle state, and at time T f Time T in sl The remaining time T f -T sl The base station may not perform the channel access procedure. In this case, even if the base station has already completed the remaining time T... f -T sl The channel access procedure is performed, but the result of the procedure may not be used. In other words, time T f -T sl This refers to the time during which the base station delays the execution of the channel access process.

[0135] If it is determined that the unlicensed frequency band is throughout time m p *T sl If the unlicensed frequency band remains idle throughout, the number N can be N = N-1. In this case, during the channel access procedure, the number N can be chosen as an integer value between 0 and the contention window value CWp. For channel access priority category 3, the minimum and maximum contention window values ​​are 15 and 63, respectively. If it is determined during the channel access procedure that the unlicensed frequency band is idle for both the delay and additional durations, the base station can use the unlicensed frequency band at time T. mcot,p The signal is transmitted within 8 ms. Table 2 also shows the channel access priority categories (or channel access priorities) in the downlink. In this disclosure, for ease of explanation, embodiments are described based on the downlink channel access priority categories. In the case of the uplink, the channel access priority categories in Table 2 can be used in the same manner, or a separate channel access priority category can be used for uplink transmissions.

[0136] Table 2

[0137]

[0138] Initial competition window value CW p It is the minimum contention window value CW min,p A base station that has already selected value N can operate for duration T. sl (For example, Figure 6 The channel access procedure is performed during the time slot duration of 620, and if the channel access procedure is performed during the duration T...sl If the channel access procedure performed by the base station determines that the unlicensed band is idle, the base station can change the value N to N = N - 1. In the case of N = 0, the base station can transmit signals through the unlicensed band within a maximum occupation time 630. If the unlicensed band is not idle, the base station can re-perform the channel access procedure without changing the value N. mcot，p For example, Figure 6 If the channel access procedure performed by the base station determines that the unlicensed band is idle, the base station can change the value N to N = N - 1. In the case of N = 0, the base station can transmit signals through the unlicensed band within a maximum occupation time 630. If the unlicensed band is not idle, the base station can re-perform the channel access procedure without changing the value N. sl The size of the contention window value CW p may be changed or maintained according to the ratio Z of NACKs in the reception results ACK / NACK of downlink data (i.e., downlink data received in a reference subframe or a reference time slot or a reference transmission time interval (reference TTI)) transmitted by one or more terminals to the base station, which have received downlink data transmitted through a downlink data channel (PDSCH 662) and downlink control information transmitted through a downlink control channel (PDCCH 660) in a reference subframe or a reference time slot or a reference transmission time interval (reference TTI). In this case, the reference subframe or the reference time slot or the reference transmission time interval (reference TTI) can be determined as the first subframe or time slot or transmission time interval (TTI) of a downlink signal transmission interval (or maximum channel occupation time (MCOT)), or the start subframe or start time slot or start transmission interval of the transmission interval, which the base station has most recently transmitted through the unlicensed band immediately before the two points in time when the base station starts the channel access procedure, when the base station selects the value N to perform the channel access procedure, or immediately before the two points in time.

[0139] Referring Figure 6, the base station can attempt channel access to occupy the unlicensed band. The first slot (or starting slot of the starting channel occupancy time) or subframe or transmission interval 640 of the downlink signal transmission interval (channel occupancy time (hereinafter COT) 630) through which the base station has transmitted a downlink signal immediately before the time point at which the base station starts the channel access procedure 670 or when the base station selects the value N to perform the channel access procedure can be defined as a reference slot or a reference subframe or a reference transmission interval. For convenience of explanation, this will be denoted as a reference slot hereinafter. Specifically, one or more consecutive slots including the first slot in which a signal is transmitted in the entire slot of the downlink signal transmission interval 630 can be defined as the reference slot. Also, according to an embodiment, if the downlink signal transmission interval starts after the first symbol of the slot, the slot in which the downlink signal transmission starts and the next slot can be defined as the reference slot. In the reference slot, if the ratio of NACK in the reception result of the downlink data that one or more terminals have transmitted or reported to the base station, which has received the downlink data transmitted through the downlink data channel in the reference slot, is equal to or greater than Z, the base station can determine the contention window value or size used in the channel access procedure 670 of the corresponding base station to be a contention window value or size greater than the contention window value or size used in the previous channel access procedure 602. In other words, the base station can increase the size of the contention window used in the channel access procedure 602. The base station can perform the next channel access procedure 670 by selecting the value N 633 within the range defined according to the contention window having the increased size.

[0140] If the base station cannot acquire the reception result of the downlink data channel transmitted by the base station in the reference slot of the transmission interval 630, for example, if the time interval between the reference slot and the time 670 at which the base station starts the channel access procedure is equal to or less than n slots or symbols (in other words, if the base station starts the channel access procedure before the minimum time at which the terminal can report the reception result of the downlink data channel transmitted in the reference slot to the base station), the first slot of the latest downlink signal transmission interval transmitted before the downlink signal transmission interval 630 can become the reference slot.

[0141] In other words, if the base station cannot receive the reception result of the downlink data transmitted from the terminal immediately before the time point at which the base station starts the channel access procedure, or at the time at which the base station selects the value N to perform the channel access procedure, the base station can determine the contention window using the reception result of the downlink data of the terminal in the reference slot of the downlink signal transmission interval most recently transmitted among the reception results of the downlink data channel of the terminal that has been received from the terminal. Also, the base station can determine the contention window size used in the channel access procedure 670 using the reception result of the downlink data received from the terminal with respect to the downlink data transmitted on the downlink data channel in the reference slot.

[0142] For example, if 80% or more of the reception result of the downlink data transmitted to the terminal on the downlink data channel in the reference slot among the downlink signals transmitted through the unlicensed band is determined to be NACK, the base station that has transmitted the downlink signal through the channel access procedure configured according to the channel access priority class 3 (p=3) (e.g., CWp=15) can increase the contention window from the initial value (CW p = 15) to the next contention window value (CW p = 31). The ratio value of 80% is exemplary, and various modifications thereof are possible.

[0143] If 80% or more of the reception result of the terminal is not determined to be NACK, the base station can maintain the contention window value as the existing value, or the base station can change the contention window value to the initial value. In this case, the change of the contention window can be commonly applied to all channel access priority classes, or the change of the contention window can be applied only to the channel access priority class used in the channel access procedure. In this case, the method of determining the reception result, which is effective for determining the change of the contention window size in the reception result of the downlink data, is as follows, the terminal transmits or reports the reception result of the downlink data to the base station with respect to the downlink data transmitted on the downlink data channel in the reference slot in which the change of the contention window size is determined, in other words, the method of determining the value Z is as follows.

[0144] If the base station transmits one or more codewords (CWs) or TBs to one or more terminals in the reference time slot, the base station can determine the value Z through the NACK ratio in the reception results transmitted or reported by the terminal with respect to the TBs received by the terminal in the reference time slot. For example, if two codewords or two TBs are transmitted to one terminal in the reference time slot, the base station can receive the reception results of the downlink data signals of the two TBs from the terminal (report). If the NACK ratio Z of the two reception results is predefined or equal to or higher than a threshold value configured between the base station and the terminal (for example, Z = 80%), the base station can change or increase the contention window size.

[0145] In this case, if the terminal transmits or reports the reception results of the downlink data including one or more time slots (for example, M time slots) of the reference time slot to the base station by bundling, the base station can determine that the terminal has transmitted M reception results. Further, the base station can determine the value Z as the ratio of NACKs in the M reception results, and it can change, maintain, or initialize the contention window size.

[0146] If the reference time slot corresponds to the second time slot including two time slots in one subframe, or if the downlink signal is transmitted from the symbol after the first symbol in the reference time slot, the reference time slot and the next time slot can be determined as the reference time slot, and the value Z can be determined as the ratio of NACKs in the reception results of the downlink data received in the reference time slot transmitted or reported to the base station by the terminal.

[0147] Further, if the scheduling information or the downlink control information of the downlink data channel transmitted by the base station is transmitted from the same cell or frequency band as the cell or frequency band in which the downlink data channel is transmitted, if the scheduling information or the downlink control information of the downlink data channel transmitted by the base station is transmitted through an unlicensed frequency band, or is transmitted from a different cell or frequency band from the cell or frequency band in which the downlink data channel is transmitted, if it is determined that the terminal does not transmit the reception results of the downlink data received in the reference time slot, or if it is determined that the reception results of the downlink data transmitted by the terminal are at least one of discontinuous transmission (DTX), NACK / DTX, and any state, the base station can determine the value Z by determining the reception results of the terminal as NACK.

[0148] Further, if it is determined that the reception results of the downlink data transmitted by the terminal are at least one of DTX, NACK / DTX, and any state in which the scheduling information and the downlink control information of the downlink data channel transmitted by the base station are transmitted through a licensed frequency band, the base station can not reflect the reception results of the terminal in the reference value Z in which the contention window is changed. In other words, the base station can determine the value Z by ignoring the reception results of the terminal.

[0149] Further, if the base station transmits scheduling information of a downlink data channel or downlink control information through a licensed band, or if the base station does not actually transmit downlink data (no transmission) in a reception result of downlink data of a reference time slot that the terminal has transmitted or reported to the base station, the base station can determine the value Z by ignoring the reception result of the downlink data transmitted or reported by the terminal.

[0150] Hereinafter, a channel access procedure in an unlicensed band in a wireless communication system according to an embodiment of the disclosure will be described with reference to the accompanying drawings. Figure 7 A channel access procedure (hereinafter, referred to as a frame-based channel access procedure or an FBE-based channel access procedure) in a case where a start time of a channel access procedure of a communication device is fixed (a frame-based equipment (FBE)) will be described.

[0151] Figure 7 Another example of a channel access procedure in an unlicensed band in a wireless communication system according to an embodiment of the disclosure will be described.

[0152] Referring to FIG. 7, Figure 7 A communication device performing a frame-based channel access procedure can periodically transmit and receive a signal according to a fixed frame period (FFP). Here, the fixed frame period 700 can be declared or configured by a communication device (for example, a base station), and it can be configured in the range of 1 ms to 10 ms. In this case, a channel access procedure (or a clear channel access (CCA)) of an unlicensed band can be performed immediately before the start of each frame period 730, 733, and 736, and in the same manner as the type 2 channel access procedure described above, the channel access procedure can perform a fixed time or one observation slot. If the unlicensed band is in an idle state due to the channel access procedure, or if it is determined that the unlicensed band is in an idle state, the communication device can transmit and receive a signal (740, 745) without performing a separate channel access procedure for a maximum of 95% of the fixed frame period 700 (hereinafter, a channel occupancy time (COT) 710). In this case, a minimum of 5% of the fixed frame period 700 is an idle time 720 in which a signal cannot be transmitted or received, and a channel access procedure can be performed in the idle time 720.

[0153] An advantage of the frame-based channel access procedure is that it is relatively simpler than the traffic-based channel access procedure, and the frame-based channel access procedure can periodically perform a channel access of an unlicensed band. However, since the start time of the channel access procedure is fixed, the probability of being able to access the unlicensed band can be reduced compared to the traffic-based channel access procedure.

[0154] Figure 8is a diagram illustrating an example of scheduling and feedback in a wireless communication system according to an embodiment of the disclosure. A base station can transmit control information including downlink and / or uplink scheduling to a terminal. The base station can transmit downlink data to the terminal. The terminal can transmit HARQ-ACK information as feedback of the downlink data to the base station. Further, the terminal can transmit uplink data to the base station. In the NR system, the uplink and downlink HARQ scheme can include an asynchronous HARQ scheme in which the data retransmission time is not fixed. For example, in the case of downlink, if the base station receives feedback of HARQ NACK about the initial transmitted data from the terminal, the base station can freely determine the transmission time of the retransmitted data according to the scheduling operation. The terminal can perform buffering of the data as a result of decoding the received data for the HARQ operation, the data is determined to be erroneous, and then the terminal can perform combining of the buffered data with the data retransmitted from the base station. The base station transmits the data retransmitted from the base station to the terminal in the time domain 814 and the frequency domain 812. The terminal can receive the data retransmitted from the base station and can perform combining of the received data with the buffered data. The terminal can transmit ACK information as feedback of the data to the base station. The base station can receive ACK information as feedback of the data from the terminal. The terminal can transmit the ACK information as feedback of the data to the base station in the time domain 814 and the frequency domain 812. The base station can receive the ACK information as feedback of the data from the terminal in the time domain 814 and the frequency domain 812. Figure 1 The base station 110 is taken as an example. The terminal is taken as the terminal 120 or the terminal 130. Figure 1 The terminal 120 or the terminal 130 is taken as an example.

[0155] Referring to Figure 8 , a resource region in which a data channel is transmitted in a 5G or NR communication system. The terminal can monitor and / or search for a PDCCH 810 in a downlink control channel (hereinafter, PDCCH) region (hereinafter, control resource set (CORESET) or search space (SS)). In this case, the downlink control channel region can be composed of information of a time domain 814 and a frequency domain 812, and the information of the time domain 814 can be configured in units of symbols, and the information of the frequency domain 812 can be configured in units of RBs or RB groups.

[0156] If the terminal detects the PDCCH 810 in the slot i 800, the terminal can obtain downlink control information (DCI) transmitted on the detected PDCCH 810. Through the received downlink control information (DCI), the terminal can obtain scheduling information about a downlink data channel or an uplink data channel 840. In other words, the DCI can include at least resource region (or PDSCH transmission region) information in which the terminal should receive a downlink data channel (hereinafter, PDSCH) transmitted from the base station or resource region information allocated to the terminal from the base station for uplink data channel (PUSCH) transmission.

[0157] A case where a terminal is scheduled to transmit using an uplink data channel (PUSCH) will be described. A terminal that has received DCI can acquire time slot index or offset information K required to receive PUSCH through the DCI, and it can determine a PUSCH transmission time slot index. For example, a terminal can determine that it is scheduled to transmit PUSCH in time slot i+K 805 based on the time slot index i 800 in which PDCCH 810 has been received, through the received offset information K. In this case, a terminal can determine a PUSCH start symbol or time in time slot i+K 805 or time slot i+K based on a CORESET in which PDCCH 810 has been received, through the received offset information K.

[0158] In addition, a terminal can acquire information about a PUSCH transmission time-frequency resource region 840 in PUSCH transmission time slot 805 through DCI. PUSCH transmission frequency resource region information 830 can include physical resource block (PRB) or group unit information of PRB. Meanwhile, PUSCH transmission frequency resource region information 830 can be information about a region included in an initial uplink bandwidth (BW) or initial uplink bandwidth part (BWP) 835 determined or configured through an initial access procedure of a terminal. If a terminal configures an uplink bandwidth (BW) or uplink bandwidth part (BWP) through a higher signal, PUSCH transmission frequency resource region information 830 can be information about a region included in an uplink bandwidth (BW) or uplink bandwidth part (BWP) configured through a higher signal.

[0159] In various embodiments, PUSCH transmission time resource region information 825 can be symbol or symbol group unit information, or it can be information indicating absolute time information. PUSCH transmission time resource region information 825 can be expressed as a combination of a PUSCH transmission start time or symbol and a duration of a PUSCH or PUSCH end time or symbol, and PUSCH transmission time resource region information 825 can be included in DCI as one field or value. A terminal can transmit PUSCH on a PUSCH transmission resource region 840 determined through DCI.

[0160] In various embodiments, a terminal that has received the PDSCH 840 can report (feedback) a reception result (e.g., HARQ-ACK / NSCK) for the PDSCH 840 to the base station. In this case, based on the PDSCH-to-HARQ timing indicator and the PUCCH resource indicator indicated by the DCI of the PDCCH 810 used for scheduling the PDSCH 840, a transmission resource of an uplink control channel (PUCCH) 870 for transmitting the reception result for the PDSCH 840 can be determined by the terminal. In other words, a terminal that has received the PDSCH-to-HARQ timing indicator K1 through the DCI of the PDCCH 810 can transmit the PUCCH 870 in a slot i+K+K1 850 after K1 from the reception slot 805 of the PDSCH 840. In this case, the uplink control channel region can consist of information of the time domain 874 and the frequency domain 872.

[0161] The base station can configure one or more values K1 to the terminal through higher layer signaling, or as described above, the base station can indicate a specific value K1 to the terminal through the DCI. The value K1 can be determined according to the HARQ-ACK processing capability of the terminal, in other words, according to the shortest time required for the terminal to receive the PDSCH and create and report the HARQ-ACK for the PDSCH. Further, the terminal can use a pre-defined value or a default value as the value K1 until the terminal is configured with the value K1.

[0162] In this case, the PUCCH 870 transmission resource in the PUCCH transmission slot 850 can be indicated by the PUCCH resource indicator of the DCI, and the terminal can perform PUCCH transmission on the indicated resource. In this case, if the transmission of multiple PUCCHs is configured or indicated in the PUCCH transmission slot 850, the terminal can perform PUCCH transmission on the PUCCH resource other than the resource indicated by the PUCCH resource indicator of the DCI of the PDCCH 810.

[0163] In the 5G communication system, in order to dynamically change the interval of downlink signal transmission and uplink signal transmission in a time division duplex (TDD) system, whether a corresponding OFDM symbol constituting one slot is a downlink symbol, an uplink symbol, or a flexible symbol can be indicated by a slot format indicator (SFI). In this context, a symbol indicated as a flexible symbol can not be a downlink and uplink symbol, nor a symbol that can be changed to a downlink or uplink symbol through UE-specific control information or scheduling information. In this case, the flexible symbol can include a gap guard necessary in the process of changing from a downlink to an uplink.

[0164] The slot format indicator can be transmitted to multiple terminals through a terminal group (or cell) common control channel at the same time. In other words, the slot format indicator can be transmitted on a PDCCH CRC scrambled with an identifier different from a terminal unique identifier (C-RNTI (cell-RNTI)) (e.g., SF-RNTI). In various embodiments, the slot format indicator can include information on N slots, and the value N can be an integer or a natural number greater than 0, or the value N can be a value configured by the base station to the terminal through a higher signal from among a set of possible values such as 1, 2, 5, 10, and 20. In addition, the size of the slot format indicator information can be configured by the base station to the terminal through a higher signal. Examples of slot formats that can be indicated by the slot format indicator are shown in Table 3.

[0165] Table 3

[0166]

[0167]

[0168] In Table 3, D denotes downlink, U denotes uplink, and F denotes a flexible symbol. According to Table 3, the total number of supportable slot formats is 256. In the current NR system, the maximum size of the slot format indicator information bit is 128 bits, and the slot format indicator information bit is a value (e.g., dci-PayloadSize) that the base station can configure to the terminal through a higher signal.

[0169] In various embodiments, the slot format indicator information can include slot formats of multiple serving cells, and the slot formats of the respective serving cells can be distinguished from each other by the serving cell ID. In addition, for each serving cell, a slot format combination of slot format indicators for one or more slots can be included. For example, if the size of the slot format indicator information bit is 3 bits, and the slot format indicator information is composed of a slot format indicator of one serving cell, the 3-bit slot format indicator information can be composed of a total of 8 slot format indicators or slot format indicator combinations (hereinafter referred to as slot format indicators), and the base station can indicate one of the eight slot format indicators through terminal group common control information (group common DCI) (hereinafter referred to as slot format indicator information).

[0170] In various embodiments, at least one of the 8 slot format indicators can be composed of slot format indicators of multiple slots. For example, Table 4 illustrates an example of 3-bit slot format indicator information composed of slot formats of Table 3. Five slot format indicators (slot format combination IDs 0, 1, 2, 3, and 4) of the slot format indicator information can be a slot format indicator of one slot, and the remaining three slot format indicators can be information on slot format indicators of four slots (slot format combination IDs 5, 6, and 7), and they can be applied to the four slots in turn.

[0171] Table 4

[0172] Slot format combination ID Slot format 0 0 1 1 2 2 3 19 4 9 5 0 0 0 0 6 1 1 1 1 7 2 2 2 2

[0173] The terminal can receive configuration information for detecting a PDCCH of the slot format indicator information through a higher signal, and the terminal can detect the slot format indicator according to the configuration. For example, the terminal can be configured with at least one of CORESET configuration for detecting slot format indicator information, search space configuration, RNTI information for CRC scrambling of DCI for transmitting slot format indicator information, search space period and offset information.

[0174] FIG. 9A illustrates a channel occupancy time in a wireless communication system according to an embodiment of the disclosure.

[0175] FIG. 9A illustrates a case where PDCCH regions 920, 922, and 924 in which the terminal should detect slot format indicator information are provided, and the period of the PDCCH regions is 2 slots. In other words, the terminal can detect DCI CRC scrambled with a slot format indicator identifier (e.g., SFI-RNTI or a new RNTI) in the PDCCH regions 920, 922, and 924 (or CORESET) in slot n 900, slot n+2 902, and slot n+4 904 according to the configured PDCCH regions and their periods, and the terminal can acquire slot format indicators for two slots through the detected DCI. In this case, the detected DCI can include slot format indicator information for two or more slots, and for how many slots including the slot format indicators in the DCI can be configured through a higher signal. Configuration information on how many slots including the slot format indicators in the DCI can be included in a higher signal equal to the higher signal for configuring the slot format indicator information.

[0176] Referring to FIG. 9A, the terminal can acquire slot formation indicator information 910 and 911 of slot n 900 and slot n+1 901 in a PDCCH region 920 of slot n 900. Similarly, the terminal can acquire slot formation indicator information 912 and 913 of slot n+2 902 and slot n+3 903 in a PDCCH region 922 of slot n+2 902. In this case, the slot formation indicator information 910, 911, 912, 913, and 914 can have at least one value in the format of Table 3. In this case, there can be a new format in addition to the format of Table 3.

[0177] If the base station transmits slot format indicator information in the unlicensed band, in particular, if the slot format indicator information includes a slot format indicator for a plurality of slots, the base station can not be able to determine the slot format indicator information for at least one slot according to whether the channel of the unlicensed band is accessed. When transmitting slot format indicator information 914 and 915 of slot n+4 904 and slot n+5 905 on the PDCCH 924, the base station needs to determine how to indicate the slot format indicator information of slot n+5 905. For example, the base station can indicate that the slot format indicator for a time other than the channel occupancy time is flexible.

[0178] Hereinafter, a method of allocating an uplink resource will be explained. The uplink resource for transmitting a signal or data can be allocated continuously or discontinuously, and if a specific resource allocation type is determined, information indicating the uplink resource allocation is interpreted according to the specific resource allocation type.

[0179] - Uplink resource allocation type 0

[0180] The uplink resource allocation type 0 scheme is a resource allocation scheme in units of a resource block group (RBG) consisting of P consecutive resource blocks (RBs) per resource block group. In this case, the size P of the RBG can be configured to be one of configuration 1 and configuration 2 through a higher signal (e.g., the rbg-size value of pusch-Config), and as in Table 5, P can be determined based on the information and the size of the enabled uplink bandwidth part. Table 5 is a table expressing the size of the bandwidth part and the size of P according to the RBG configuration value. In this case, the size of the bandwidth part corresponds to the number of PRBs constituting the bandwidth part.

[0181] Table 5

[0182] Carrier bandwidth part size Configuration 2 1-36 4 37-72 8 73-144 16 145-275 16

[0183] Uplink bandwidth part N BWP The total number N of RBGs that can be determined RBG= ceiling(N BWP size + N BWP start mod P). Here, the size of the first RBG RBG0 is P - N BWP start mod P. If the size of (N BWP start + N BWP size mod P is greater than 0, the size of the last RBG RBG last becomes (N BWP start + N BWP size mod P, and if the size of (N BWP start + N BWP size mod P is not greater than 0, the size of the last RBG RBG last becomes P. The size of the remaining RBGs except for the first and last RBGs becomes P. In this case, N BWP start indicates a CRB where a BWP starts with respect to CRB0, and N BWP start can be understood as a point where a specific BWP starts in CRB. N BWP size indicates the number of RBs included in a BWP. In this case, the length (or size or number of bits) of the frequency resource allocation information is equal to N RBG , and the terminal can be configured or scheduled using a resource on which uplink transmission is configured or scheduled for each RBG in RBG units by a bitmap consisting of N RBG bits. For example, the terminal can determine that an RBG region configured as 1 in the bitmap is a resource allocated for uplink transmission, and the terminal can determine that an RBG region configured as 0 is not a resource allocated for uplink transmission. In this case, the RBG bitmap is sequentially (in ascending order) aligned and mapped on the axis in which the frequency increases. By this method, contiguous or non-contiguous RBGs can be allocated for uplink transmission.

[0184] - Uplink resource allocation type 1

[0185] The uplink resource allocation type 1 scheme is a contiguous frequency resource allocation scheme within an enabled uplink bandwidth part. The frequency resource allocation information of the uplink resource allocation type 1 scheme can be indicated to the terminal through a resource indication value (RIV). The length (or size or number of bits) of the frequency resource allocation information is equal to ceiling(log2(NBWP (N BWP +1) / 2) is the same. The RIV indicates the start RB RB start and the L RBs allocated contiguously L RBs .

[0186] If, then RIV = N BWP (L RBs -1) + RB start

[0187] Otherwise, RIV = N BWP (N BWP -L RBs +1) + (N BWP -1-RB s，tart )

[0188] where L RBs ≥ 1 and should not exceed N BWP -RB start .

[0189] Here, N BWP is the size of the enabled uplink bandwidth part, and N BWP is expressed in the number of PRBs. RB start is the first PRB where the uplink resource allocation starts, and L RBs is the length or number of contiguous PRBs. In this case, if one of the DCIs (hereinafter referred to as UL grant) that configures or schedules the uplink transmission, such as DCI format 0_0, is transmitted in the common search space (CSS), the size N BWP，0 of the initial bandwidth part is used.

[0190] In addition, in the case of one of the DCI formats of the UL grant (for example, DCI format 0_0 transmitted from the UE-specific common search space (USS)), the size or the number of bits of the frequency resource allocation information of the UL grant is determined as the size of the initial bandwidth part N initial，BWP , but in the case of the DCI for scheduling another enabled bandwidth part for the UL grant, the RIV value is RB start = 0, K, 2K,..., (N initial，BWP -1)·K and L RBs = K, 2K,..., N initial，BWP ·K, and their configurations are as follows.

[0191] If, then RIV = N initial，BWP (L′ RBs -1) + RB′ start

[0192] Otherwise, RIV = N initial，BWP (N initial，BWP -L′ RBs +1)+(N initial，BWP -1-RB′ start )

[0193] in, And L′ RBs It should not exceed N initial，BWP -RB′ start .

[0194] In this case, the bandwidth of the other enabled bandwidth portion is N. active，BWP In the state of N active，BWP >N initial，BWP In the case that K satisfies If the natural number is K, then K becomes K = 1.

[0195] -Uplink resource allocation type 2

[0196] Uplink resource allocation type 2 is an allocation scheme that distributes uplink signal or channel transmission frequency resources across the entire available uplink bandwidth, characterized by equal or comparable distances or intervals between allocated frequency resources. According to uplink resource allocation type 2, resource allocation is uniformly distributed across the entire frequency band. Therefore, uplink resource allocation type 2 can be applied in limited cases where uplink signals or channels are transmitted in a carrier, cell, or bandwidth portion operating in an unlicensed frequency band that must meet frequency allocation requirements (such as power spectral density (PSD) requirements or occupied channel bandwidth (OCB) conditions).

[0197] Referring to Figure 9B, the uplink resource allocation type 2 scheme will be described as follows.

[0198] Figure 9B illustrates a terminal according to an embodiment of the present disclosure configured to perform uplink signal transmission / reception with a base station via a bandwidth portion 950, and the terminal is scheduled to transmit uplink data channels via uplink resource allocation type 2, assuming that the bandwidth portion 950 consists of 51 PRBs. According to uplink resource allocation type 2, the 51 PRBs can constitute L (in the case of Figure 9B, L = 5) resource area sets, and each resource area set can be composed of... consists of 11 PRBs (#i, #i+5, #i+10, #i+15,..., #i+45, #i+50), and the remaining resource region set, e.g., the fourth resource region set 940 consists of 10 PRBs (#i+3, #i+8, #i+13, #i+18,..., #i+48). In other words, the number of PRBs included in a resource region set can differ according to the size of the bandwidth part or the number of PRBs of the bandwidth part. The terminal can be allocated one or more resource region sets configured as above, or the terminal can be allocated a contiguous resource region set (e.g., resource region sets #0, #1, or #2, #3, and #4) by a method similar to uplink resource allocation type 1 (e.g., allocation based on an RIV value), or the terminal can be allocated a contiguous or non-contiguous resource region set similar to uplink resource allocation type 0 (e.g., allocation based on a bitmap).

[0199] For example, in the case where the terminal is allocated a contiguous resource allocation region set in a manner similar to uplink resource allocation type 1, if there are N resource region sets, the terminal can determine the allocated frequency resource region (or allocated resource region set) by a resource indication value (RIV) representing the start resource region set RB start and L contiguous resource region sets, and in this case, the RIV value is as follows.

[0200] If RIV = N(L-1) + RB start

[0201] Otherwise, RIV = N(N-L+1) + (N-1-RB start )

[0202] For example, in the case where RIV = 0, this indicates the first resource region set or resource region set #0 and one resource region set consisting of PRBs #i, #i+10, #i+20,..., and #i+50 in this case of FIG. 9B. In this case, the length (or size or number of bits) of the frequency resource allocation information can be ceiling(log2(N(N+1) / 2).

[0203] As another example, in the case where a set of contiguous or non-contiguous resource regions is allocated using a bitmap, an L-bit bitmap indicating L sets of resource regions constituting a bandwidth part 950 in ascending order of frequency resources or in ascending order of set of resource region indices can be configured, and the set of resource regions can be allocated through the bitmap. For example, in the case of FIG. 9B, the location of the set of resource regions can be indicated by a bitmap consisting of 5 bits, and the bitmap 10000 indicates that the first set of resource regions, i.e., one resource region set consisting of PRBs #i, #i+10, #i+20,..., and #i+50 in FIG. 9B, is allocated. The bitmap 00010 indicates that the fourth set of resource regions, i.e., PRBs #i+3, #i+8, #i+13, #i+18,..., and #i+48 in FIG. 9B, is allocated. In this case, the length (or size or number of bits) of the frequency resource allocation information can be L.

[0204] - Uplink resource allocation type 3

[0205] FIG. 9C is a diagram illustrating uplink resource allocation type 3 according to an embodiment of the disclosure.

[0206] Referring to FIG. 9C, the uplink resource allocation type 3 scheme is an allocation scheme such that uplink signal or channel transmission frequency resources are distributed over the entire enabled uplink bandwidth part, and is characterized in that a resource group (or allocated resource block or allocated resource cluster) allocated as contiguous resources (e.g., 951 or 961) is completely distributed within the bandwidth part (e.g., 951, 952, and 953 and 961, 962, and 963) by an iterative transmission scheme or the like. That is, the allocated resource group 951 as contiguous resources can exist iteratively in frequency resources such as 951, 952, 953, and accordingly, a plurality of allocated resource groups can exist in the bandwidth part. According to the uplink resource allocation type 3, the contiguous allocated resource group (or block or cluster) is distributed in the frequency band, and thus the uplink resource allocation type 3 can be applied in a limited manner in the case where an uplink signal or channel is transmitted in a carrier, a cell, or a bandwidth part operating in an unlicensed band in which a frequency allocation requirement such as a power spectral density (PSD) requirement or an occupied channel bandwidth (OCB) condition should be satisfied.

[0207] In the case where a base station and a terminal support a plurality of frequency resource allocation schemes (i.e., in the case where a terminal is pre-defined or configured to use a plurality of frequency resource allocation schemes), it is necessary to provide a method of correctly determining a frequency resource allocation scheme to be adopted during uplink signal or channel transmission by the terminal. Accordingly, in the disclosure, a method for determining a frequency resource allocation scheme during uplink signal or channel transmission by a terminal is proposed.

[0208] Hereinafter, in various embodiments of the disclosure, for convenience of explanation, the uplink resource allocation scheme is divided into two schemes of a first scheme and a second scheme. Here, the first scheme refers to a scheme in which uplink signal transmission resources are allocated continuously on a frequency axis, like an uplink resource allocation type 1 scheme. The second scheme refers to a resource allocation scheme in which uplink signal transmission resources are equally distributed at intervals in a bandwidth part on a frequency axis, like an uplink resource allocation type 2 scheme. In this case, the uplink resource allocation type 1 as an expression of the first scheme and the uplink resource allocation type 2 as an expression of the second scheme are merely exemplary, and a resource allocation scheme modified based on types 1 and 2 can also be expressed as the first scheme and the second scheme. For example, uplink resource allocation types 3 or 4 can be included in the first scheme and the second scheme (preferably, types 3 or 4 can be included in the second scheme). In this case, resource allocation types 2 or 4 can also be classified as a third scheme.

[0209] Further, if the uplink resource allocation scheme is configured as a specific uplink resource allocation type, the base station can create uplink resource allocation information according to the specific uplink resource allocation type, and the terminal can interpret the uplink resource allocation information according to the specific type. Hereinafter, a technique of configuring a specific uplink resource allocation scheme can refer to a technique in which the base station creates uplink resource allocation information according to a specific uplink resource allocation type (or according to a resource allocation scheme modified based on the specific uplink resource allocation type), transmits the created uplink resource allocation information as a higher signal or an UL grant (DCI), and the terminal interprets the uplink resource allocation information transmitted to the higher signal or the UL grant (DCI) according to the specific uplink resource allocation type (or according to the resource allocation scheme modified based on the specific uplink resource allocation type) to identify allocated uplink resources.

[0210] [First Embodiment]

[0211] In the present embodiment, a method is proposed in which a base station and a terminal support a plurality of frequency resource allocation schemes, and the terminal determines a random access preamble (hereinafter, referred to as a preamble or a physical random access channel (PRACH)) transmission frequency resource allocation scheme or a frequency resource region (hereinafter, simply referred to as a frequency resource allocation scheme).

[0212] In the present embodiment, the base station can receive information from the terminal regarding the functions or capabilities that the terminal can support and including the frequency resource allocation scheme of the preamble that the terminal can support, and through the information, the base station can determine the frequency resource allocation scheme of the preamble that the terminal can support. Thereafter, the base station can indicate or configure one or more preamble frequency resource allocation schemes to the terminal, so that the terminal supporting multiple frequency resource allocation schemes can transmit a preamble according to the frequency resource allocation scheme that the base station supports or the frequency resource allocation scheme that the base station intends to receive from the terminal. Meanwhile, in the embodiments of the present disclosure, the higher signal or system information configuration method for indicating or configuring the preamble resource allocation scheme (e.g., enabling / disabling, enumeration, and selection) is merely exemplary, and the present disclosure is not limited thereto.

[0213] Further, in the present disclosure, a method for indicating or configuring the preamble frequency resource allocation scheme to the terminal will be described, but the preamble frequency resource region can also be indicated or configured by the base station to the terminal, and the terminal determines the preamble frequency resource allocation scheme according to the frequency resource region. In this case, the preamble frequency resource allocation scheme applied to a specific frequency resource region can be predetermined, or the preamble frequency resource allocation scheme applied to a specific frequency resource region can be configured by the base station.

[0214] Method 1-1: Configuring the preamble transmission frequency resource allocation scheme through system information or higher signal

[0215] Hereinafter, the method 1-1 will be described in more detail. The method 1-1 is a method in which the base station indicates or configures the preamble transmission frequency resource allocation scheme to the terminal through system information or a higher signal. Since the preamble transmission frequency resource allocation scheme is indicated or configured through the system information, all terminals can transmit the preamble through the same frequency resource allocation scheme in the bandwidth part in which the preamble is transmitted. In this case, the preamble transmission frequency resource allocation scheme can be included in the random access related configuration information (e.g., rach-configcommon or prach-ConfigurationIndex) to be transmitted to the terminal. In this case, a default preamble transmission frequency resource allocation scheme between the base station and the terminal can be defined in advance. For example, a first scheme can be a default preamble transmission frequency allocation scheme (e.g., a scheme in which the preamble is transmitted through K consecutive PRBs), and a scheme (e.g., a frequency resource allocation scheme of a second scheme) other than the first scheme can be enabled through the system information. If the frequency resource allocation scheme of the second scheme is enabled, the terminal determines the second scheme as the preamble transmission frequency resource allocation scheme. In this case, if the frequency resource allocation scheme of the second scheme is enabled, the terminal can possibly determine both the first scheme and the second scheme as the preamble transmission frequency resource allocation scheme, and in this case, the transmission frequency resource allocation scheme that the terminal should use during the preamble transmission can be determined through at least one of the method 1-2 and the method 1-3 proposed in Embodiment 1.

[0216] Meanwhile, the frequency resource region in which the preamble can be transmitted can be determined through a higher signal (e.g., a minimum PRB index of the frequency resource region in which the preamble can be transmitted, a lowest frequency, or msg1-FrequencyStart), a preamble frequency multiplexing number n RA ∈{0,1,...,M-1}(here, M is a value configured as a higher signal (e.g., msg1-FDM)), and time domain resource information (e.g., prach-ConfigurationIndex) in which the preamble can be transmitted.

[0217] As another example, the base station can designate and configure at least one of the uplink resource allocation schemes to the terminal through the system information. For example, the base station can designate the terminal to use one of the first scheme or the second scheme, or one of the first scheme and the second scheme as the preamble resource allocation scheme. If both the first scheme and the second scheme are used for the preamble transmission frequency resource allocation, the terminal can determine the transmission frequency resource allocation scheme that should be used during the preamble transmission through at least one of the method 1-2 and the method 1-3 proposed in Embodiment 1.

[0218] Method 1-2: Preamble transmission frequency resource allocation scheme is determined depending on whether a preamble is transmitted within a channel occupancy time of a base station

[0219] Hereinafter, the method 1-2 will be described in more detail. The method 1-2 is characterized in that, if the preamble transmission frequency resource allocation scheme is configured by the method 1-1, the preamble transmission frequency resource allocation scheme can be different depending on whether a preamble is transmitted within a channel occupancy time of a base station. Thereby, the preamble transmission frequency resource allocation scheme can be the same as or different from each other depending on whether a preamble is transmitted within a channel occupancy time of a base station.

[0220] Preferably, after performing the channel access procedure, the base station controls the uplink signal transmission of the terminal within a channel occupancy time in which the base station accesses and uses the channel. For example, the base station can transmit DCI indicating preamble transmission to at least one terminal on a downlink control channel, and the terminal that has received the DCI can transmit a preamble according to the DCI. In addition, the base station can indicate to the terminal to transmit an uplink control channel (PUCCH) and a data channel (PUSCH), and can multiplex the uplink signal and the channel. Accordingly, the base station needs to effectively multiplex the uplink signal and the channel transmitted by the terminal within at least one slot or transmission time interval by having the same resource allocation scheme for the uplink signal and the channel at least in the channel occupancy time. Accordingly, in the present disclosure, a method is provided in which the preamble transmission frequency resource allocation scheme is independently configured depending on whether at least a preamble is transmitted within a channel occupancy time of a base station.

[0221] For example, the terminal can be configured with a transmission resource allocation scheme (e.g., a first scheme) in the case of transmitting a preamble within the channel occupancy time of the base station, and a transmission resource allocation scheme (e.g., a second scheme) in the case of transmitting a preamble from the base station through system information or a higher signal in a time other than the channel occupancy time of the base station. Further, the transmission resource allocation scheme in the case of transmitting a preamble in a time other than the channel occupancy time of the base station can be pre-defined between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., a first scheme) in the case of transmitting a preamble within the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal. Similarly, the transmission resource allocation scheme in the case of transmitting a preamble within the channel occupancy time of the base station can be pre-defined between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., a first scheme) in the case of transmitting a preamble in a time other than the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal. Further, if the terminal is not configured with a transmission resource allocation scheme in the case of transmitting a preamble within the channel occupancy time of the base station, or if the transmission resource allocation scheme is not enabled, the terminal can even apply the transmission resource allocation scheme in the case of transmitting a preamble in a time other than the channel occupancy time of the base station to the case of transmitting a preamble within the channel occupancy time of the base station.

[0222] Similarly, the transmission resource allocation scheme in the case of transmitting a preamble within the channel occupancy time of the base station can be pre-defined between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., a first scheme) in the case of transmitting a preamble in a time other than the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal. In this case, if the terminal is not configured with a transmission resource allocation scheme in the case of transmitting a preamble in a time other than the channel occupancy time of the base station, or if the scheme is not enabled, the terminal can even apply the transmission resource allocation scheme in the case of transmitting a preamble within the channel occupancy time of the base station to the case of transmitting a preamble within the channel occupancy time of the base station.

[0223] As described above, the terminal which has determined the transmission resource allocation scheme (e.g., the first scheme) in the case where the preamble is transmitted within the channel occupancy time of the base station and the transmission resource allocation scheme (e.g., the second scheme) in the case where the preamble is transmitted in the time other than the channel occupancy time of the base station, can determine whether the preamble transmission time or transmission slot is the time (or slot) within the channel occupancy time of the base station or the time (or slot) other than the channel occupancy time, and the terminal can transmit the preamble through the correct transmission resource allocation scheme according to the result of the determination. In this case, the terminal can determine whether the base station occupies the channel or the base station accesses the channel depending on whether the reference signal (e.g., DMRS) transmitted by the base station is detected, or the terminal can determine whether the base station occupies the channel by receiving information on whether the base station accesses the channel or information on the channel occupancy time of the base station transmitted by the base station through the downlink control channel.

[0224] In this case, the information on whether the base station accesses the channel or the information on the channel occupancy time can consist not only of information on at least one bandwidth part and one transmission interval or slot, but also of information on at least one of a plurality of bandwidth parts and a plurality of slots. In addition, the information on whether the base station accesses the channel or the information on the channel occupancy time can consist of information on one or more sub-band units having a size smaller than the size of the bandwidth part, or information on one or more mini-slots or transmission time intervals or symbols consisting of symbols smaller than symbols. For example, as shown in FIG. 9A, in the case where the base station transmits a signal by accessing the unlicensed band channel after performing the channel access procedure, the base station can transmit the channel occupancy time, slot format indicator information 910, 911, 912, 913, and 914 within the channel occupancy time, or other information capable of determining the same (e.g., channel occupancy start time and channel occupancy end time) to the terminal through the PDCCH. The terminal which has received the information can determine whether to transmit the preamble within the determined channel occupancy time of the base station, and the terminal can transmit the preamble according to the method 1-2 according to the result of the determination.

[0225] Method 1-3: Determining the frequency resource allocation scheme through the DCI indicating the preamble transmission

[0226] Hereinafter, the methods 1-3 will be described in more detail. The methods 1-3 are a method in which, if the preamble transmission frequency resource allocation scheme is configured by the method 1-1 or the like, the preamble transmission frequency resource allocation scheme is independently configured depending on whether the preamble is transmitted by the indication of the base station or the preamble is transmitted without any separate indication of the base station according to the determination of the terminal. Thereby, the preamble transmission frequency resource allocation scheme can be the same as or different from each other according to the case where the preamble is transmitted by the indication of the base station (or in the case of transmitting the preamble in the contention-free random access procedure) or the case where the preamble is transmitted without any separate indication of the base station according to the determination of the terminal (or in the case of transmitting the preamble in the contention-based random access procedure).

[0227] Here, the case where the preamble is transmitted by the indication of the base station or the contention-free random access procedure refers to the case where the terminal transmits the preamble according to the DCI configuration or indication information, the terminal having received the DCI CRC scrambled with the RA-RNTI in the DCI transmitted on the downlink control channel. Meanwhile, the case where the preamble is transmitted according to the determination of the terminal without the indication of the base station or the contention-based random access procedure refers to the case where the terminal transmits the preamble for the purpose of the uplink data transmission resource request if the terminal accesses the cell initially or if the terminal cannot be allocated the resource for transmitting the uplink data from the base station.

[0228] Accordingly, in the case where the preamble is transmitted according to the indication of the base station, the terminal transmits the preamble according to the information indicated or configured by the base station through the DCI, the terminal having received the DCI CRC scrambled with the RA-RNTI in the DCI transmitted on the downlink control channel, for example. In the above case, the base station can indicate one or more terminals to transmit the uplink control channel (PUCCH) or data channel (PUSCH) during the time or slot in which the preamble is transmitted, so that the uplink signals and channels can be multiplexed. Accordingly, the base station needs to effectively multiplex the uplink signals and channels transmitted by the terminal in the transmission interval or slot in which the preamble transmission is indicated by the base station by making the uplink signals and channels transmitted by the terminal have the same resource allocation scheme. Accordingly, in the disclosure, a method is provided in which the preamble transmission frequency resource allocation scheme can be independently configured depending on whether the preamble is transmitted according to the indication of the base station.

[0229] For example, the terminal can be configured with a transmission resource allocation scheme (e.g., a first scheme) in the case of transmitting a preamble according to an indication of the base station and a transmission resource allocation scheme (e.g., a second scheme) in the case of transmitting a preamble according to a determination of the terminal from the base station through system information or a higher signal. In this case, the transmission resource allocation scheme in the case of transmitting a preamble according to an indication of the base station can be pre-defined between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., a first scheme) in the case of transmitting a preamble according to a determination of the terminal can be configured or enabled by the base station through system information or a higher signal. In this case, if the terminal is not configured with the transmission resource allocation scheme in the case of transmitting a preamble according to a determination of the terminal, or if the scheme is not enabled, the terminal can even apply the transmission resource allocation scheme in the case of transmitting a preamble according to an indication of the base station to the case of transmitting a preamble according to a determination of the terminal. Similarly, the transmission resource allocation scheme in the case of transmitting a preamble according to a determination of the terminal can be pre-defined between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., a first scheme) in the case of transmitting a preamble according to an indication of the base station can also be configured or enabled by the base station through system information or a higher signal. Furthermore, if the terminal is not configured with the transmission resource allocation scheme in the case of transmitting a preamble according to an indication of the base station, or if the scheme is not enabled, the terminal can even also apply the transmission resource allocation scheme in the case of transmitting a preamble according to a determination of the terminal to the above case.

[0230] In this case, if a preamble is transmitted according to an indication of the base station, the transmission resource allocation scheme of the preamble can also be determined through information in the DCI indicating preamble transmission. For example, the transmission resource allocation scheme of the preamble can be indicated or configured through at least one field (e.g., a transmission resource allocation scheme identifier) in the DCI CRC scrambled with the RA-RNTI. In this case, the transmission resource allocation scheme identifier can be added as a new field, or at least one bit in a pre-existing field can be used or configured as the transmission resource allocation scheme identifier. For example, the transmission resource allocation scheme of the preamble can be indicated or configured through one MSB bit in the frequency axis resource allocation field.

[0231] Meanwhile, since it is obvious that not only Method 1-3 is to be considered together in the process of determining the transmission resource allocation scheme of the preamble using Method 1-2, but also Method 1-2 is to be considered together in the process of determining the transmission resource allocation scheme of the preamble using Method 1-3, detailed descriptions thereof will be omitted.

[0232] [Second Embodiment]

[0233] In the present embodiment, a method in which a base station and a terminal support a plurality of frequency resource allocation schemes is proposed. According to the method, the terminal transmits a random access preamble, and if a random access response (hereinafter, referred to as RAR or RAR UL grant) is received from the base station as one of the corresponding response signals, the terminal determines a transmission frequency resource allocation scheme of an uplink data channel scheduled by the RAR.

[0234] The base station transmits, in response to the preamble transmitted by the terminal, DCI CRC scrambled with RA-RNTI on a downlink control channel to the terminal. The terminal that has received the DCI receives a PDSCH according to the information indicated or scheduled by the DCI. The RAR MAC PDU is transmitted from the base station to the terminal through the PDSCH, and the terminal identifies a random access preamble identification (RAPID) transmitted by the base station to the terminal in the RAR MAC PDU. In this case, the RAPID is a value created by the terminal according to the preamble transmitted in advance, and thus the terminal can identify that the received RAPID is the RAPID of the terminal by comparing the RAPID of the preamble transmitted by the terminal itself with the received RAPID. If it is identified that the received RAPID is the RAPID of the terminal, the terminal transmits an uplink data channel to the base station according to the information indicated or scheduled by the UL grant included in the RAR MAC PDU. Table 6 is a table representing a RAR UL grant field and its size.

[0235] Table 6

[0236] RAR UL grant field Number of bits Frequency hopping flag 1 PUSCH frequency resource allocation 14 PUSCH time resource allocation 4 MCS 4 TPC command for PUSCH 3 CSI request 1

[0237] In the present embodiment, a method in which a base station and a terminal support a plurality of frequency resource allocation schemes is proposed. According to the method, the terminal transmits a random access preamble, and if a random access response (hereinafter, referred to as RAR or RAR UL grant) is received from the base station as one of the corresponding response signals, the terminal determines a transmission frequency resource allocation scheme of an uplink data channel (or msg3) scheduled by the RAR.

[0238] Method 2-1: Using the same resource allocation scheme as the preamble resource allocation scheme

[0239] Method 2-1 is a method in which the terminal determines the transmission frequency resource allocation scheme of the uplink data channel scheduled by the RAR as the same resource allocation scheme as the preamble resource allocation scheme indicated or determined according to one or more of the various methods of Embodiment 1 of the present disclosure. The advantage of Method 2-1 is that additional information for indicating or configuring the transmission frequency resource allocation scheme of the uplink data channel scheduled by the RAR is not required.

[0240] Method 2-2: determining a resource allocation scheme according to a waveform configuration of an uplink data channel scheduled by the RAR

[0241] Hereinafter, method 2-2 will be described in more detail. In a 5G system such as NR, a terminal can use a plurality of uplink transmission waveforms. For example, in the case of an NR system, a terminal can support a CP-OFDM-based uplink signal waveform and a DFT-s-OFDM-based uplink waveform, and one of the waveforms can be configured to be used from a base station, or both waveforms can be used. In addition, different waveforms can be used according to a transmission signal or channel, or different waveforms can be configured through a higher signal. For example, a terminal can determine a waveform of an uplink data channel through an information element (IE) of system information (e.g., msg3-transformPrecoder of RACH-ConfigCommon). For example, if msg3-transformPrecoder is enabled, the terminal can determine that the waveform of the uplink data channel is a DFT-s-OFDM-based waveform, and the terminal can transmit the uplink data channel using the determined waveform. In this case, if msg3-transformPrecoder is disabled or the field does not exist, the terminal can determine that the waveform of the uplink data channel is a CP-OFDM-based waveform, and the terminal can transmit the uplink data channel using the determined waveform.

[0242] Generally, a DFT-s-OFDM waveform has a feature of a low peak-to-average power ratio (PAPR) compared to a CP-OFDM waveform, and the DFT-s-OFDM waveform is more suitable in the case of using a contiguous resource allocation in a frequency axis, whereas in the case of a CP-OFDM waveform, the CP-OFDM waveform can be used for a non-contiguous resource allocation. Accordingly, a resource allocation scheme of an uplink data channel scheduled by the RAR can be determined according to a waveform configuration of the uplink data channel. For example, if a waveform of an uplink data channel scheduled by the RAR is configured as a DFT-s-OFDM waveform, the terminal can determine that a resource allocation of the uplink data channel scheduled by the RAR corresponds to a first scheme (a contiguous resource allocation scheme). If a waveform of an uplink data channel scheduled by the RAR is configured as a CP-OFDM waveform, the terminal can determine that a resource allocation of the uplink data channel scheduled by the RAR corresponds to a second scheme (a distributed resource allocation scheme).

[0243] Method 2-3: indicating a resource allocation scheme through the RAR UL grant

[0244] Method 2-3 is a method of determining a resource allocation scheme of an uplink data channel scheduled by RAR using at least one of field values included in a field of a RAR UL grant.

[0245] For example, a field indicating a resource allocation scheme of an uplink data channel is introduced in a RAR UL grant, and a terminal can determine a resource allocation scheme of an uplink data channel scheduled by RAR according to a field value. For example, a resource allocation type indicator of one bit in size is added, and if the field value is 0, the field value can indicate that the resource allocation scheme of the uplink data channel scheduled by RAR is a first scheme, and if the field value is 1, the field value can indicate that the resource allocation scheme of the uplink data channel scheduled by RAR is a second scheme. In this case, the resource allocation scheme indicated by the name and size of the field and the bit value is only exemplary. In this case, in a case where the terminal performs contention-free-based random access, a CSI request field of the RAR UL grant is not used but is reserved, and thus the field can be used to indicate the resource allocation scheme of the uplink data channel scheduled by RAR.

[0246] As another example, a resource allocation scheme of an uplink data channel scheduled by a frequency hopping flag field of a RAR UL grant can be determined. For example, if an uplink data channel scheduled by RAR is transmitted in a non-licensed band cell, the flag field can be re-interpreted as information indicating a resource allocation scheme of an uplink data channel scheduled by RAR, or a resource allocation type indicator can be replaced according to a field value to determine a resource allocation scheme of an uplink data channel.

[0247] As still another example, a resource allocation scheme of an uplink data channel can be determined according to a configuration value of a frequency hopping flag field of a RAR UL grant. In a case of a second scheme, frequency resources are uniformly distributed over the entire bandwidth part, and thus frequency hopping is not required for an uplink data channel allocated by the second scheme. Accordingly, if frequency hopping is configured (for example, if the flag field value is 1), a terminal can determine that a resource allocation of an uplink data channel scheduled by RAR corresponds to a first scheme, and if frequency hopping is not configured (for example, if the flag field value is 0), the terminal can determine that a resource allocation of an uplink data channel scheduled by RAR corresponds to a second scheme.

[0248] Method 2-4: Determining a transmission frequency resource allocation scheme depending on whether an uplink data channel scheduled by RAR is transmitted within a channel occupancy time of a base station

[0249] Hereinafter, the method 2-4 will be described in more detail. The method 2-4 is a method of determining a transmission frequency resource allocation scheme of an uplink data channel (hereinafter, referred to as an uplink data channel or msg3) if the transmission frequency resource allocation scheme of the uplink data channel scheduled through the RAR is indicated or configured by at least one of the method 2-1, the method 2-2, and the method 2-3, depending on whether the uplink data channel is transmitted within the channel occupancy time of the base station. Thereby, the transmission frequency resource allocation scheme of the uplink data channel can be the same as or different from each other depending on whether the uplink data channel is transmitted within the channel occupancy time of the base station or within a time other than the channel occupancy time of the base station. Accordingly, the transmission frequency resource allocation scheme of the uplink data channel (hereinafter, referred to as an uplink data channel or msg3) can be the same as or different from the transmission frequency resource allocation scheme of the uplink data channel indicated or configured by at least one of the method 2-1, the method 2-2, and the method 2-3.

[0250] Preferably, the base station controls the uplink signal transmission of the terminal within the channel occupancy time in which the base station accesses and uses the channel after performing the channel access procedure. For example, the base station can transmit DCI indicating preamble transmission on a downlink control channel to at least one terminal, and the terminal that has received the DCI can transmit a preamble according to the DCI. In addition, the base station can indicate to transmit an uplink control channel (PUCCH) or a data channel (PUSCH) to the terminal, and can multiplex the uplink signal and the channel. Accordingly, the base station needs to effectively multiplex the uplink signal and the channel transmitted by the terminal within at least one slot or transmission time interval by making the uplink signal and the channel have the same resource allocation scheme at least within the channel occupancy time. Therefore, a method of independently configuring the transmission frequency resource allocation scheme depending on whether at least the uplink data channel is transmitted within the channel occupancy time of the base station is required.

[0251] For example, the terminal can transmit the uplink data channel using a transmission resource allocation scheme (e.g., a first scheme) in case that the uplink data channel configured as the RAR UL grant is transmitted within the channel occupancy time of the base station and a transmission resource allocation scheme (e.g., a second scheme) in case that the uplink data channel is transmitted at a time other than the channel occupancy time of the base station. In this case, the transmission resource allocation scheme in case that the uplink data channel is transmitted at a time other than the channel occupancy time of the base station can be pre-defined between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., a first scheme) in case that the uplink data channel is transmitted within the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal or the RAR UL grant. Similarly, the transmission resource allocation scheme in case that the uplink data channel is transmitted within the channel occupancy time of the base station can be pre-defined between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., a first scheme) in case that the uplink data channel is transmitted at a time other than the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal or the RAR UL grant. Further, the transmission resource allocation scheme (e.g., a second scheme) in case that the uplink data channel is transmitted at a time other than the channel occupancy time of the base station can be configured through the RAR UL grant, and the transmission resource allocation scheme (e.g., a first scheme) in case that the uplink data channel is transmitted within the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal. Similarly, the transmission resource allocation scheme (e.g., a first scheme) in case that the uplink data channel is transmitted within the channel occupancy time of the base station can be configured through the RAR UL grant, and the transmission resource allocation scheme (e.g., a second scheme) in case that the uplink data channel is transmitted at a time other than the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal.

[0252] Further, if the terminal is not configured with a transmission resource allocation scheme in a case where the uplink data channel is transmitted in a time other than the channel occupancy time of the base station, or if the transmission resource allocation scheme is not enabled, the terminal can even apply the transmission resource allocation scheme in a case where the uplink data channel is transmitted in the channel occupancy time of the base station to a case where the uplink data channel is transmitted in a time other than the channel occupancy time of the base station. Similarly, the transmission resource allocation scheme in a case where the uplink data channel is transmitted in the channel occupancy time of the base station can be defined in advance between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., a first scheme) in a case where the uplink data channel is transmitted in a time other than the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal. In this case, if the terminal is not configured with the transmission resource allocation scheme in a case where the uplink data channel is transmitted in a time other than the channel occupancy time of the base station, or if the scheme is not enabled, the terminal can even apply the transmission resource allocation scheme in a case where the uplink data channel is transmitted in the channel occupancy time of the base station to a case where the uplink data channel is transmitted in a time other than the channel occupancy time of the base station.

[0253] As described above, the terminal can determine a transmission resource allocation scheme (e.g., a first scheme) in a case where the uplink data channel is transmitted in the channel occupancy time of the base station and a transmission resource allocation scheme (e.g., a second scheme) in a case where the uplink data channel is transmitted in a time other than the channel occupancy time of the base station, and the terminal can determine whether the uplink data channel transmission time or transmission slot is a time within the channel occupancy time of the base station or a time other than the channel occupancy time, and the terminal can transmit the uplink data channel through the correct transmission resource allocation scheme according to the result of the determination. In this case, the terminal can determine whether the base station occupies the channel or the base station accesses the channel depending on whether the reference signal (e.g., DMRS) transmitted by the base station is detected, or the terminal can determine whether the base station occupies the channel by receiving information about whether the base station accesses the channel or information about the channel occupancy time of the base station transmitted by the base station through the downlink control channel.

[0254] In this case, the information on whether the base station accesses the channel or the information on the channel occupancy time can not only consist of information on at least one bandwidth part and one transmission interval or slot, but also consist of information on a plurality of bandwidth parts and at least one of a plurality of slots. In addition, the information on whether the base station accesses the channel or the information on the channel occupancy time can consist of information on one or more sub-band units having a size smaller than the size of the bandwidth part or one or more mini-slots or transmission time intervals or information on a symbol consisting of a symbol smaller than a symbol. Such information can refer to FIG. 9A.

[0255] [Third Embodiment]

[0256] In this embodiment, a method in which a base station and a terminal support a plurality of frequency resource allocation schemes is proposed. According to the method, the terminal receives a DCI for scheduling an uplink data channel transmission (hereinafter, referred to as UL grant) from the base station, and in the case of transmitting the uplink data channel accordingly, the terminal determines a transmission frequency resource allocation scheme of the uplink data channel.

[0257] Method 3-1: Configuring a transmission frequency resource allocation scheme of an uplink data channel through system information or a higher signal

[0258] Method 3-1 is a method of indicating or configuring a transmission frequency resource allocation scheme of an uplink data channel to a terminal. The transmission frequency resource allocation scheme of the uplink data channel is indicated or configured through system information, and all terminals can transmit the uplink data channel in the same frequency resource allocation scheme in a bandwidth part in which the uplink data channel is transmitted. In this case, the transmission frequency resource allocation scheme of the uplink data channel can be included in uplink data channel-related configuration information (e.g., pusch-config) to be transmitted to the terminal. In this case, a default frequency allocation scheme between the base station and the terminal can be defined in advance. For example, a first scheme can be a default transmission frequency resource allocation scheme of the uplink data channel, and the base station can enable a frequency resource allocation scheme of a scheme other than the first scheme (e.g., a frequency resource allocation scheme of a second scheme) through system information or a higher signal. If the frequency resource allocation scheme of the scheme other than the first scheme (e.g., the second scheme) is not enabled through the system information or the higher signal, in other words, if the frequency resource allocation scheme of the second scheme is disabled, the terminal can determine the transmission frequency resource allocation scheme of the uplink data channel to be the default frequency resource allocation scheme.

[0259] If the frequency resource allocation scheme of the second scheme is enabled, the terminal determines the second scheme as the transmission frequency resource allocation scheme of the uplink data channel. In this case, if the frequency resource allocation scheme of the second scheme is enabled, the terminal can also determine both the first scheme and the second scheme as the transmission frequency resource allocation scheme of the uplink data channel, and in this case, the transmission frequency resource allocation scheme that the terminal should use during transmission of the uplink data channel can be indicated through the DCI or UL grant for scheduling the uplink data channel, or the transmission frequency resource allocation scheme can be determined through at least one of the other methods proposed in Embodiment 3.

[0260] The above-described method can be applied not only to the uplink data channel scheduled through the UL grant but also to the uplink data channel transmission frequency resource allocation scheme of the uplink data channel scheduled without the UL grant. In the NR system, the uplink data channel scheduled without the UL grant as described above can be referred to as the uplink data channel configured through configured UL transmission or configured grant (or configured scheduling), and the transmission frequency resource allocation scheme of the uplink data channel scheduled without the UL grant can be configured separately from the transmission frequency resource allocation scheme of the uplink data channel scheduled through the UL grant.

[0261] Method 3-2: Determining the resource allocation scheme according to the waveform configuration of the uplink data channel

[0262] Hereinafter, Method 3-2 will be described in more detail. In the 5G system such as NR, the terminal can use a plurality of uplink transmission waveforms. For example, in the case of the NR system, the terminal can support a CP-OFDM-based uplink signal waveform and a DFT-s-OFDM-based uplink waveform, and one of the waveforms can be configured to be used from the base station, or both waveforms can be used. In addition, different waveforms can be defined in advance to be used according to the transmission signal or channel.

[0263] For example, the terminal can determine the waveform of the uplink data channel through an information element (IE) of the system information (e.g., msg3-transformPrecoder of RACH-ConfigCommon). For example, if msg3-transformPrecoder is enabled, the terminal can determine that the waveform of the uplink data channel is a DFT-s-OFDM-based waveform, and the terminal can transmit the uplink data channel scheduled through the RAR UL grant. In this case, if msg3-transformPrecoder is disabled or the field is not present, the terminal can determine that the waveform of the uplink data channel is a CP-OFDM-based waveform, and the terminal can transmit the uplink data channel using the determined waveform. Similarly, the terminal can be additionally configured with the waveform of the uplink data channel other than the uplink data channel scheduled through the RAR UL grant, in other words, the waveform of the uplink data channel transmitted through a higher signal (e.g., transformPrecoder in pusch-Config and / or transformPrecoder in configuredGrantConfig), through DCI or UL grant scrambled with C-RNTI or CS-RNTI.

[0264] Generally, the DFT-s-OFDM waveform has a feature of low peak-to-average power ratio (PAPR) compared to the CP-OFDM waveform, and the DFT-s-OFDM waveform is more suitable in the case of continuous resource allocation on the frequency axis, whereas in the case of the CP-OFDM waveform, the CP-OFDM waveform can be used for non-continuous resource allocation. Accordingly, the resource allocation scheme of the uplink data channel can be determined according to the waveform configuration of the uplink data channel scheduled through the UL grant. For example, if the waveform of the uplink data channel scheduled through the UL grant is configured as the DFT-s-OFDM waveform, the terminal can determine that the resource allocation of the uplink data channel scheduled through the UL grant corresponds to a first scheme. If the waveform of the uplink data channel scheduled through the UL grant is configured as the CP-OFDM waveform, the terminal can determine that the resource allocation of the uplink data channel scheduled through the UL grant corresponds to a second scheme.

[0265] Further, the resource allocation scheme of the uplink data channel can be determined according to the UL grant format (i.e., DCI format) for scheduling the uplink data channel. For example, the resource allocation scheme of the uplink data channel scheduled by one of the UL grant formats for scheduling the uplink data channel (e.g., UL grant for scheduling fallback or default uplink data channel, e.g., DCI format 0_0) and the resource allocation scheme of the uplink data channel scheduled by another one of the UL grant formats for scheduling the uplink data channel (e.g., UL grant for scheduling general uplink data channel, e.g., DCI format 0_1) can be the same as or different from each other.

[0266] That is, the NR system will be described as an example. The terminal can determine that the uplink data channel scheduled as format 0_0 as one of the UL grant formats for scheduling the uplink data channel follows the first scheme, and the uplink data channel scheduled as format 0_1 as one of the UL grant formats for scheduling the uplink data channel follows the second scheme. In this case, the DCI formats 0_0 and 0_1 are merely exemplary, and the method can be applied even to another DCI format.

[0267] Method 3-3: Indicating resource allocation scheme by RAR UL grant

[0268] Method 3-3 is a method of determining the resource allocation scheme of the uplink data channel scheduled by the UL grant using at least one field value in the field (i.e., DCI) included in the UL grant.

[0269] For example, a field indicating the resource allocation scheme of the uplink data channel is introduced in the UL grant, and the terminal can determine the resource allocation scheme of the scheduled uplink data channel according to the field value. For example, a resource allocation type indicator of one bit in size can be added to the UL grant alone, or an indicator of one bit in size can be added to the field indicating the frequency axis resource allocation information, and if the field value is 0, the field value can indicate that the resource allocation scheme of the uplink data channel scheduled by the UL grant is the first scheme, and if the field value is 1, the field value can indicate that the resource allocation scheme of the uplink data channel scheduled by the UL grant is the second scheme. In this case, the resource allocation scheme indicated by the name and size of the field and the bit value is merely exemplary. Further, an indicator of one bit or one row can be added to the field indicating the time axis resource allocation information or a table corresponding thereto, thereby indicating the resource allocation scheme of the uplink data channel.

[0270] As another example, the terminal can determine a resource allocation scheme of an uplink data channel scheduled through the frequency hopping flag field of the UL grant. For example, if the uplink data channel scheduled through the UL grant is transmitted in a non-licensed band cell, the flag field can be re-interpreted as a resource allocation scheme of the uplink data channel scheduled through the UL grant, or the resource allocation scheme of the uplink data channel can be determined by replacing the flag field with a resource allocation type indicator according to the field value.

[0271] Further, depending on the configuration value of the frequency hopping flag field of the UL grant, the terminal can determine the resource allocation scheme of the uplink data channel. In the case of the second scheme, the frequency resources are uniformly distributed over the entire bandwidth part. Therefore, frequency hopping is not required for the uplink data channel allocated through the second scheme. Accordingly, if frequency hopping is configured (for example, if the flag field value is 1), the terminal can determine that the resource allocation of the uplink data channel scheduled through the UL grant corresponds to the first scheme, and if frequency hopping is not configured (for example, if the flag field value is 0), the terminal can determine that the resource allocation of the uplink data channel scheduled through the UL grant corresponds to the second scheme.

[0272] Method 3-4: Determining a transmission frequency resource allocation scheme depending on whether an uplink data channel scheduled through a UL grant is transmitted within a channel occupancy time of a base station

[0273] Hereinafter, the method 3-4 will be described in more detail. The method 3-4 is a method of determining a transmission frequency resource allocation scheme of an uplink data channel (hereinafter, referred to as an uplink data channel) depending on whether the uplink data channel is transmitted within a channel occupancy time of a base station, if the transmission frequency resource allocation scheme of the uplink data channel scheduled through a UL grant is indicated or configured by at least one of the method 3-1, the method 3-2, and the method 3-3. Through this method, the transmission frequency resource allocation scheme of the uplink data channel can be the same as or different from each other depending on whether the uplink data channel is transmitted within the channel occupancy time of the base station or within a time other than the channel occupancy time of the base station, and thus, the transmission frequency resource allocation scheme of the uplink data channel can be the same as or different from the transmission frequency resource allocation scheme of the uplink data channel indicated or configured by at least one of the method 3-1, the method 3-2, and the method 3-3.

[0274] Preferably, the base station controls the uplink signal transmission of the terminal in a channel occupancy time in which the base station accesses and uses the channel after performing the channel access procedure. For example, the base station can transmit an UL grant to at least one terminal on a downlink control channel, and the terminal that has received the UL grant can transmit an uplink data channel according to the UL grant. In addition, the base station can indicate to transmit an uplink control channel (PUCCH) or a data channel (PUSCH) to one or more terminals, and can multiplex the uplink signal and channel. Accordingly, the base station needs to effectively multiplex the uplink signal and channel transmitted by the terminal in at least one time slot or transmission time interval by having the same resource allocation scheme for the uplink signal and channel at least in the channel occupancy time. Therefore, there is a need for a method of independently configuring a transmission frequency resource allocation scheme depending on whether at least an uplink data channel is transmitted in the channel occupancy time of the base station.

[0275] For example, the terminal can transmit the uplink data channel using a transmission resource allocation scheme (e.g., a first scheme) in case that the uplink data channel configured by the UL grant is transmitted within the channel occupancy time of the base station and a transmission resource allocation scheme (e.g., a second scheme) in case that the uplink data channel is transmitted at a time other than the channel occupancy time of the base station. In this case, the transmission resource allocation scheme in case that the uplink data channel is transmitted at a time other than the channel occupancy time of the base station can be pre-defined between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., the first scheme) in case that the uplink data channel is transmitted within the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal or the UL grant. Similarly, the transmission resource allocation scheme in case that the uplink data channel is transmitted within the channel occupancy time of the base station can be pre-defined between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., the first scheme) in case that the uplink data channel is transmitted at a time other than the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal or the UL grant. In this case, the transmission resource allocation scheme (e.g., the second scheme) in case that the uplink data channel is transmitted at a time other than the channel occupancy time of the base station can be configured through the UL grant, and the transmission resource allocation scheme (e.g., the first scheme) in case that the uplink data channel is transmitted within the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal. Similarly, the transmission resource allocation scheme (e.g., the first scheme) in case that the uplink data channel is transmitted within the channel occupancy time of the base station can be configured through the UL grant, and the transmission resource allocation scheme (e.g., the second scheme) in case that the uplink data channel is transmitted at a time other than the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal.

[0276] In addition, if the terminal is not configured with a transmission resource allocation scheme in a case where the uplink data channel is transmitted in a time other than the channel occupancy time of the base station, or if the transmission resource allocation scheme is not enabled, the terminal can even apply the transmission resource allocation scheme in a case where the uplink data channel is transmitted in the channel occupancy time of the base station to a case where the uplink data channel is transmitted in a time other than the channel occupancy time of the base station. Similarly, the transmission resource allocation scheme in a case where the uplink data channel is transmitted in the channel occupancy time of the base station can be defined in advance between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., a first scheme) in a case where the uplink data channel is transmitted in a time other than the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal. In this case, if the terminal is not configured with the transmission resource allocation scheme in a case where the uplink data channel is transmitted in a time other than the channel occupancy time of the base station, or if the scheme is not enabled, the terminal can even apply the transmission resource allocation scheme in a case where the uplink data channel is transmitted in the channel occupancy time of the base station to a case where the uplink data channel is transmitted in a time other than the channel occupancy time of the base station.

[0277] As described above, the terminal can determine a transmission resource allocation scheme (e.g., a first scheme) in a case where the uplink data channel is transmitted in the channel occupancy time of the base station and a transmission resource allocation scheme (e.g., a second scheme) in a case where the uplink data channel is transmitted in a time other than the channel occupancy time of the base station, and the terminal can determine whether the uplink data channel transmission time or transmission slot is a time within the channel occupancy time of the base station or a time other than the channel occupancy time, and the terminal can transmit the uplink data channel through the correct transmission resource allocation scheme according to the result of the determination. In this case, the terminal can determine whether the base station occupies the channel or the base station accesses the channel depending on whether the reference signal (e.g., DMRS) transmitted by the base station is detected, or the terminal can determine whether the base station occupies the channel by receiving information about whether the base station accesses the channel or information about the channel occupancy time of the base station transmitted by the base station through the downlink control channel.

[0278] In this case, the information on whether the base station accesses the channel or the information on the channel occupancy time can not only consist of information on at least one bandwidth part and one transmission interval or slot, but also consist of information on a plurality of bandwidth parts and at least one of a plurality of slots. In addition, the information on whether the base station accesses the channel or the information on the channel occupancy time can consist of information on one or more sub-band units having a size smaller than the size of the bandwidth part or information on one or more mini-slots or transmission time intervals or symbols consisting of symbols smaller than the slots. Such information on whether the base station accesses the channel or the information on the channel occupancy time can refer to FIG. 9A.

[0279] Method 3-5: Using the same resource allocation scheme as the uplink data channel transmitted through the RAR UL grant

[0280] Method 3-5 is a method in which the terminal applies the same scheme as the transmission frequency resource allocation scheme of the uplink data channel scheduled through the RAR UL grant indicated or determined according to one or more of the various methods according to Embodiment 2 of the disclosure. The advantage of Method 3-5 is that additional information for indicating or configuring the transmission frequency resource allocation scheme of the uplink data channel scheduled through the UL grant is not required, and the terminal can transmit all uplink data channels using the same transmission frequency resource allocation scheme without distinguishing the transmission frequency resource allocation scheme of the uplink data channel according to the DCI for scheduling the uplink data channel.

[0281] [Fourth Embodiment]

[0282] In this embodiment, a method in which a base station and a terminal support a plurality of frequency resource allocation schemes is proposed. According to the method, the terminal receives DCI for scheduling a downlink data channel (PDSCH) from the base station, and in the case in which the terminal transmits reception results or response signal (HARQ-ACK) information of the received PDSCH on an uplink control channel (PUCCH), the terminal determines the transmission frequency resource allocation scheme of the uplink control channel. In Embodiment 4, the case in which the terminal transmits reception results or response signal (HARQ-ACK) information of the received PDSCH on an uplink control channel (PUCCH) is described as an example, but this embodiment can even be applied to the case in which channel state information is transmitted through an uplink control channel (PUCCH).

[0283] Method 4-1: Configuring the transmission frequency resource allocation scheme of the uplink control channel through system information or higher signal

[0284] Hereinafter, method 4-1 will be described in more detail. Method 4-1 is a method in which the base station indicates or configures a transmission frequency resource allocation scheme of the uplink control channel through system information or a higher signal. By indicating or configuring the transmission frequency resource allocation scheme of the uplink control channel through the system information, all terminals can transmit the uplink control channel in the same frequency resource allocation scheme in the bandwidth part in which the uplink control channel is transmitted. In this case, the transmission frequency resource allocation scheme of the uplink control channel can be included in uplink control channel-related configuration information (e.g., pucch-config) to be transmitted to the terminal. In this case, a default frequency allocation scheme between the base station and the terminal can be defined in advance. For example, a first scheme can be a default transmission frequency resource allocation scheme of the uplink control channel, and a frequency resource allocation scheme of a scheme other than the first scheme (e.g., a frequency resource allocation scheme of a second scheme) can be enabled through the system information or the higher signal. If the frequency resource allocation scheme of the scheme other than the first scheme (e.g., the second scheme) is not enabled through the system information or the higher signal, in other words, if the frequency resource allocation scheme of the second scheme is disabled, the terminal can determine the transmission frequency resource allocation scheme of the uplink control channel to be the default frequency resource allocation scheme.

[0285] If the frequency resource allocation scheme of the second scheme is enabled, the terminal determines the second scheme as the transmission frequency resource allocation scheme of the uplink control channel. In this case, if the frequency resource allocation scheme of the second scheme is enabled, the terminal can also determine both the first scheme and the second scheme as the transmission frequency resource allocation scheme of the uplink control channel, and in this case, the transmission frequency resource allocation scheme that should be used by the terminal during transmission of the uplink control channel can be indicated through DCI for indicating or scheduling the uplink control channel (in other words, DCI for scheduling a PDSCH), or the transmission frequency resource allocation scheme can be determined through at least one of the other methods proposed in Embodiment 4. Here, the DCI for indicating or scheduling the uplink control channel can be DCI for scheduling a PDSCH, if the terminal receives DCI for scheduling reception of a downlink data channel (PDSCH) from the base station, and the terminal transmits reception result or response signal (HARQ-ACK) information of the received PDSCH on an uplink control channel (PUCCH), the terminal indicates configuration information, such as an uplink control channel resource and time, on which the terminal will transmit a response signal through the DCI.

[0286] Further, the transmission frequency resource allocation scheme of the uplink control channel can be configured as a resource of the uplink control channel configured through system information or a higher signal. That is, the base station can configure the frequency resource allocation scheme of the uplink control channel such that the frequency resource allocation scheme of the uplink control channel is the same as or different from each other on the uplink control channel resource #0 and the uplink control channel resource #1.

[0287] Method 4-2: Determining resource allocation scheme according to waveform configuration of uplink data channel

[0288] Hereinafter, the method 4-2 will be described in more detail. In the 5G system such as NR, the terminal can use a plurality of uplink transmission waveforms. For example, in the case of the NR system, the terminal can support a CP-OFDM-based uplink signal waveform and a DFT-s-OFDM-based uplink waveform, and one of the waveforms can be configured to be used from the base station, or both waveforms can be used. Further, different waveforms can be defined in advance to be used according to a transmission signal or channel, or different waveforms can be configured through a higher signal.

[0289] For example, the terminal can determine the waveform of the uplink data channel through an information element (IE) of system information (e.g., msg3-transformPrecoder of RACH-ConfigCommon). For example, if msg3-transformPrecoder is enabled, the terminal can determine that the waveform of the uplink data channel is a DFT-s-OFDM-based waveform, and the terminal can transmit the uplink data channel (e.g., the uplink data channel scheduled through the RAR UL grant) using the determined waveform. In this case, if msg3-transformPrecoder is disabled or the field does not exist, the terminal can determine that the waveform of the uplink data channel is a CP-OFDM-based waveform, and the terminal can transmit the uplink data channel using the determined waveform. Similarly, the terminal can be additionally configured with the waveform of the uplink data channel other than the uplink data channel scheduled through the RAR UL grant, in other words, the waveform of the uplink data channel transmitted through the DCI or UL grant scrambled with C-RNTI or CS-RNTI through a higher signal (e.g., transformPrecoder in pusch-Config and / or transformPrecoder in configuredGrantConfig).

[0290] Generally, the DFT-s-OFDM waveform has a characteristic of a low peak-to-average power ratio (PAPR) compared to the CP-OFDM waveform, and the DFT-s-OFDM waveform is more suitable in a case of using a continuous resource allocation in a frequency axis, whereas the CP-OFDM waveform can be used for a non-continuous resource allocation in the case of the CP-OFDM waveform. Accordingly, the resource allocation scheme of the uplink control channel can be determined according to the waveform configuration of the uplink data channel scheduled through the UL grant. For example, if the waveform configuration of the uplink data channel scheduled through the UL grant is configured as the DFT-s-OFDM waveform, the terminal can determine that the resource allocation of the uplink control channel scheduled through the UL grant corresponds to the first scheme. If the waveform configuration of the uplink data channel scheduled through the UL grant is configured as the CP-OFDM waveform, the terminal can determine that the resource allocation of the uplink control channel corresponds to the second scheme.

[0291] In this case, the resource allocation scheme of the uplink control channel can also be determined according to the DCI format used to schedule the downlink data channel. For example, the resource allocation scheme of the downlink data channel scheduled through one of the DCI formats used to schedule the downlink data channel (e.g., a DCI for scheduling a fallback or default downlink data channel, such as DCI format 1_0) and the resource allocation scheme of the uplink data channel scheduled through another one of the DCI formats used to schedule the downlink data channel (e.g., a DCI for scheduling a general downlink data channel, such as DCI format 1_1) can be the same as or different from each other.

[0292] That is, taking the NR system as an example. It can be determined to transmit the uplink control channel according to the first scheme, which transmits a reception result or a response signal of the downlink data channel scheduled through format 1_0 as one of the DCI formats used to schedule the downlink data channel, and to transmit the uplink control channel according to the second scheme, which transmits a reception result or a response signal of the downlink data channel scheduled through format 1_1 as another one of the DCI formats used to schedule the downlink data channel. In this case, the DCI formats 1_0 and 1_1 are merely exemplary, and the method can be applied even to another DCI format.

[0293] In addition, the waveform applied during PUCCH transmission can be different according to the uplink control channel (PUCCH) format, and as one example, if the terminal transmits the PUCCH using the DFT-s-OFDM waveform, the terminal can determine that the resource allocation of the uplink control channel corresponds to the first scheme. In addition, in the case of transmitting the PUCCH using the CP-OFDM waveform, the terminal can determine that the resource allocation of the uplink control channel corresponds to the second scheme.

[0294] Method 4-3: Resource allocation scheme indication by DCI

[0295] Method 4-3 is a method of determining a resource allocation scheme of an uplink control channel for transmitting a PDSCH reception result using at least one field value included in a field in DCI for scheduling a PDSCH reception.

[0296] For example, a field indicating a resource allocation scheme of an uplink control channel is introduced in DCI, and a terminal can determine a resource allocation scheme of an indicated or scheduled uplink control channel according to a field value. For example, a resource allocation type indicator of one bit in size can be added to DCI alone, or an indicator of one bit in size can be added to a field indicating uplink control channel information, and if the field value is 0, the field value can indicate that the resource allocation scheme of the uplink control is a first scheme, and if the field value is 1, the field value can indicate that the resource allocation scheme of the uplink control channel is a second scheme. In this case, the resource allocation scheme indicated by the name and size of the field and the bit value is only exemplary.

[0297] Method 4-4: Determining transmission frequency resource allocation scheme depending on whether uplink data channel scheduled by UL grant is transmitted within channel occupancy time of base station

[0298] Hereinafter, method 4-4 will be described in more detail. Method 4-4 is a method of determining a transmission frequency resource allocation scheme of an uplink control channel depending on whether the uplink control channel is transmitted within a channel occupancy time of a base station. Through this method, the transmission frequency resource allocation scheme of the uplink control channel can be the same as or different from each other depending on whether the uplink control channel is transmitted within the channel occupancy time of the base station or within a time other than the channel occupancy time of the base station, and thus, the transmission frequency resource allocation scheme of the uplink control channel can be the same as or different from the transmission frequency resource allocation scheme of the uplink control channel indicated or configured by at least one of method 4-1, method 4-2, and method 4-3.

[0299] Preferably, the base station controls the uplink signal transmission of the terminal in the channel occupancy time in which the base station accesses and uses the channel after performing the channel access procedure. For example, the base station can transmit an UL grant to one or more terminals on a downlink control channel, and the terminal that has received the UL grant can transmit an uplink data channel according to the UL grant. In addition, the base station can indicate to transmit an uplink control channel (PUCCH) or a data channel (PUSCH) to one or more terminals, and can multiplex the uplink signal and channel. Accordingly, the base station needs to effectively multiplex the uplink signal and channel transmitted by the terminal in at least one time slot or transmission time interval by having the same resource allocation scheme for the uplink signal and channel at least in the channel occupancy time of the base station. Therefore, there is a need for a method of independently configuring a transmission frequency resource allocation scheme depending on whether at least an uplink control channel is transmitted in the channel occupancy time of the base station.

[0300] For example, the terminal can transmit the uplink control channel using a transmission resource allocation scheme (e.g., a first scheme) in case of transmitting the uplink control channel within the channel occupancy time of the base station and a transmission resource allocation scheme (e.g., a second scheme) in case of transmitting the uplink control channel at a time other than the channel occupancy time of the base station. In this case, the transmission resource allocation scheme in case of transmitting the uplink control channel at a time other than the channel occupancy time of the base station can be pre-defined between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., the first scheme) in case of transmitting the uplink control channel within the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal or DCI for scheduling a PDSCH. Similarly, the transmission resource allocation scheme in case of transmitting the uplink control channel within the channel occupancy time of the base station can be pre-defined between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., the first scheme) in case of transmitting the uplink control channel at a time other than the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal or DCI for scheduling a PDSCH. In this case, the transmission resource allocation scheme (e.g., the second scheme) in case of transmitting the uplink control channel at a time other than the channel occupancy time of the base station can be configured through DCI for scheduling a PDSCH, and the transmission resource allocation scheme (e.g., the first scheme) in case of transmitting the uplink control channel within the channel occupancy time of the base station can be configured or enabled through system information or a higher signal. Similarly, the transmission resource allocation scheme (e.g., the first scheme) in case of transmitting the uplink control channel within the channel occupancy time of the base station can be configured through DCI for scheduling a PDSCH, and the transmission resource allocation scheme (e.g., the second scheme) in case of transmitting the uplink control channel at a time other than the channel occupancy time of the base station can be configured or enabled through system information or a higher signal.

[0301] In addition, if the terminal is not configured with a transmission resource allocation scheme in a case where the uplink control channel is transmitted in a time other than the channel occupancy time of the base station, or if the transmission resource allocation scheme is not enabled, the terminal can even apply the transmission resource allocation scheme in a case where the uplink control channel is transmitted in the channel occupancy time of the base station to a case where the uplink control channel is transmitted in a time other than the channel occupancy time of the base station. Similarly, the transmission resource allocation scheme in a case where the uplink control channel is transmitted in the channel occupancy time of the base station can be defined in advance between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., a first scheme) in a case where the uplink control channel is transmitted in a time other than the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal. In this case, if the terminal is not configured with the transmission resource allocation scheme in a case where the uplink control channel is transmitted in a time other than the channel occupancy time of the base station, or if the scheme is not enabled, the terminal can even apply the transmission resource allocation scheme in a case where the uplink control channel is transmitted in the channel occupancy time of the base station to a case where the uplink control channel is transmitted in a time other than the channel occupancy time of the base station.

[0302] As described above, the terminal can determine a transmission resource allocation scheme (e.g., a first scheme) in a case where the uplink control channel is transmitted in the channel occupancy time of the base station and a transmission resource allocation scheme (e.g., a second scheme) in a case where the uplink control channel is transmitted in a time other than the channel occupancy time of the base station, and the terminal can determine whether the uplink data channel transmission time or transmission slot is a time within the channel occupancy time of the base station or a time other than the channel occupancy time, and the terminal can transmit the uplink data channel through the correct transmission resource allocation scheme according to the result of the determination. In this case, the terminal can determine whether the base station occupies the channel or the base station accesses the channel depending on whether the reference signal (e.g., DMRS) transmitted by the base station is detected, or the terminal can determine whether the base station occupies the channel by receiving information about whether the base station accesses the channel or information about the channel occupancy time of the base station transmitted by the base station through the downlink control channel.

[0303] In this case, the information on whether the base station accesses the channel or the information on the channel occupancy time can not only consist of information on at least one bandwidth part and one transmission interval or slot, but also consist of information on a plurality of bandwidth parts and at least one of a plurality of slots. In addition, the information on whether the base station accesses the channel or the information on the channel occupancy time can consist of information on one or more sub-band units having a size smaller than the size of the bandwidth part or information on one or more mini-slots or transmission time intervals or symbols consisting of symbols smaller than the slots. Such information on whether the base station accesses the channel or the information on the channel occupancy time can refer to FIG. 9A.

[0304] Method 4-5: Using the same resource allocation scheme as the uplink data channel

[0305] Method 4-5 is a method in which the terminal transmits the uplink control channel by applying the same scheme as the transmission frequency resource allocation scheme of the uplink data channel scheduled by the UL grant indicated or determined through one or more of the various methods according to Embodiment 3 of the disclosure. The advantage of Method 4-5 is that additional information for indicating or configuring the transmission frequency resource allocation scheme of the uplink control channel is not required, and according to the method, all uplink data channels and uplink control channels can use the same transmission frequency resource allocation scheme.

[0306] In this case, the terminal can further include a method of transmitting the uplink control channel by applying the same scheme as the transmission frequency resource allocation scheme of the uplink data channel scheduled by the RAR UL grant indicated or determined through one or more of the various methods according to Embodiment 3 of the disclosure.

[0307] [Embodiment (4-2)]

[0308] In this embodiment, a method in which a base station and a terminal support a plurality of frequency resource allocation schemes is proposed. According to the method, the terminal receives DCI for scheduling a downlink data channel (PDSCH) from the base station, and in the case where the terminal transmits reception results or response signal (HARQ-ACK) information of the received PDSCH on an uplink control channel (PUCCH), if the transmission frequency resource allocation scheme of the uplink control channel determined or configured according to the fourth embodiment is the frequency resource allocation scheme of the second scheme, the terminal determines the PUCCH transmission resource. In Embodiment 4-2, the case where the terminal transmits reception results or response signal (HARQ-ACK) information of the received PDSCH on an uplink control channel (PUCCH) is described as an example, but this embodiment can even be applied to the case where channel state information is transmitted through an uplink control channel (PUCCH).

[0309] If the frequency resource allocation scheme of the second scheme is configured as a PUCCH frequency resource allocation scheme for PUCCH transmission, or if the frequency resource allocation scheme of the second scheme is enabled, the terminal can be allocated with a PUCCH resource in units of the above uplink control channel resource #k. In other words, one uplink control channel resource becomes a basic transmission frequency resource for PUCCH transmission. For example, the terminal can be allocated with the uplink control channel resource index #3 940 in FIG. 9B as a frequency resource #m for PUCCH, and the terminal can transmit PUCCH #m using the PRB included in the uplink control channel resource #3 940. The uplink control channel resource can be independently configured for each PUCCH resource at this time, and the uplink control channel resource can also be independently configured for each PUCCH format or PUCCH resource set.

[0310] In this case, in the case of transmitting a large amount of information (payload) through PUCCH, the terminal can need a large amount of PUCCH resources. Therefore, it is necessary to allocate multiple uplink control channel resources to the terminal in the PUCCH resource index #m. Hereinafter, in the present disclosure, an assumption that two uplink control channel resources are allocated will be explained, but the present disclosure is not limited thereto.

[0311] The terminal can be allocated with one uplink control channel resource or two uplink control channel resources for PUCCH resource #m. If the terminal is configured to use two uplink control channel resources for PUCCH resource #m, the terminal can determine the second uplink control channel resource using the first uplink control channel resource implicitly or explicitly.

[0312] For example, as described above, the terminal allocated with the uplink control channel resource #k as the PUCCH resource #m can determine the second uplink control channel resource through the following method.

[0313] Method 1: For PUCCH resource #m, this method determines only the next resource or resource index of the first uplink control channel resource (e.g., interlace 0) configured by a higher signal as the second uplink control channel resource (e.g., interlace 1) for PUCCH resource #m.

[0314] For example, if the terminal is allocated an uplink control channel resource #k as a first uplink control channel resource (interlace 0) for PUCCH #m through a higher signal, the terminal can determine the next index #k+1 of the uplink control channel resource as a second uplink control channel resource (interlace 1). In this case, if there are M valid uplink control channel resources in total, the terminal through a higher signal can determine the second uplink control channel resource by performing a modulo operation on the next index of the index configured as the first uplink control channel resource and the M control channel resources. That is, the terminal which has been configured with the first uplink control channel resource (e.g., interlace 0) #k as a resource of PUCCH #m through a higher signal can determine the index of the second uplink control channel resource as mod(k+1, M).

[0315] Method 2: This method uses the first uplink control channel resource (e.g., interlace 0) configured through a higher signal for PUCCH resource #m and offset information to determine the second uplink control channel resource (e.g., interlace 1) of PUCCH resource #m.

[0316] For example, the terminal can be configured with the first uplink control channel resource (interlace 0) of PUCCH #m and an additional offset value i of the second uplink control channel resource determined through a higher signal. In this case, the terminal can determine #k+i to which the offset value is applied based on the first uplink control channel resource #k configured as the index of the second uplink control channel resource (interlace 0). In this case, the offset i can be an integer including a negative number, 0, and a positive number, or the offset i can be a positive integer equal to or greater than 0.

[0317] In this case, in the same manner as in Method 1, if there are M valid uplink control channel resources in total, the terminal can determine the second uplink control channel resource by performing a modulo operation on the first uplink control channel resource (interlace 0) index of PUCCH #m configured through a higher signal, the uplink control channel resource (interlace 1) index determined through offset information, and the number M of control channel resources. That is, the terminal which is configured with the first uplink control channel resource (e.g., interlace 0) #k as PUCCH resource #m through a higher signal can determine the index of the second uplink control channel resource as mod(k+i, M).

[0318] Method 3: This method configures all the first uplink control channel resources (e.g., interlace 0) and the second uplink control channel resources (interlace 1) for PUCCH resource #m through a higher signal.

[0319] Even in a case where two or more uplink control channel resources are configured, if the amount of information (payload) to be actually transmitted is small, the terminal can transmit the PUCCH using only one uplink control channel resource. For example, the terminal can perform PUCCH transmission using the minimum number of PRBs capable of satisfying a code rate equal to or higher than a code rate configured for UCI transmission on the PUCCH or determined for UCI transmission. In this case, in the case of the uplink control channel using the second scheme of the frequency resource allocation scheme, the minimum frequency allocation resource is the uplink control channel resource (in the case of FIG. 9B, the uplink control channel resource #0 930 or the uplink control channel resource #3 940), and thus the terminal can transmit the uplink control channel using the minimum uplink control channel resource (or interlace) capable of satisfying a code rate equal to or higher than a code rate configured for UCI transmission on the PUCCH or determined for UCI transmission. That is, if the terminal is configured with two uplink control channels in the PUCCH resource #m and the above-described minimum uplink control channel resource is one uplink control channel, the terminal transmits the UCI using one of the two configured uplink control channels. In this case, the terminal can select the uplink control channel resource to be used for actual transmission among the two uplink control channel resources configured in the PUCCH resource #m by selecting one or combining the two uplink control channel resources.

[0320] Method A: The terminal can select the uplink control channel resource having the lowest uplink control channel resource index or the uplink control channel resource having the highest uplink control channel resource index, and the terminal can transmit the UCI using the selected uplink control channel resource.

[0321] Method B: The terminal can transmit the uplink control channel using the uplink control channel resource configured by a higher signal.

[0322] The terminal can transmit the UCI using an uplink control channel resource index of a plurality of uplink control channel resources configured with the PUCCH resource #m or a first uplink control channel resource (interlace 0) of the uplink control channel resources. For example, in the case of Method 2, the first uplink control channel among the uplink control channel resources of the PUCCH resource #m is a resource corresponding to the resource index (interlace 0) configured by a higher signal. The second uplink control channel among the uplink control channel resources of the PUCCH resource #m is an uplink control channel resource determined or configured using the first uplink control channel and offset information. In this case, Method B transmits the uplink control channel using the uplink control channel resource index of the uplink control channel resource among the PUCCH resources #m configured with the PUCCH, or the first uplink control channel resource (interlace 0), and thus the terminal transmits the UCI using the first uplink control channel (interlace 0) among the uplink control channel resources of the PUCCH resource #m.

[0323] If there are a plurality of uplink control channel resources configured with an uplink control channel resource index, as in Method A, the terminal can select an uplink control channel resource having the lowest uplink control channel resource index and an uplink control channel resource having the highest uplink control channel resource index, and the terminal can transmit the uplink control channel using the selected uplink control channel resources.

[0324] In this case, as in Method 2, Method B is more efficient by configuring the second uplink control channel resource by offset. For example, it is assumed that the base station configures two uplink control channel resources #0 and #1 for two terminals, and the two terminals share and use the resources. In this case, the base station can configure the uplink control channel resource #0 and offset 1 for terminal #0, and the base station can configure the uplink control channel resource #1 and offset -1 for terminal #1. If the uplink control channel resource required for actual UCI transmission is less than the uplink control channel resources configured on the PUCCH resources in the terminal #0 and the terminal #1, the terminal transmits the UCI using the uplink control channel resources configured with the uplink control channel resource index or the first uplink control channel resource according to Method B. In this case, the terminal #0 transmits the UCI through the uplink control channel resource #0 and the terminal #1 transmits the UCI through the uplink control channel resource #1, so that the two terminals can transmit the UCI on different resources without overlapping.

[0325] Method C: The terminal is configured with an uplink control channel resource to be used for actual transmission by a higher signal, and the terminal transmits the uplink control channel through the configured uplink control channel resource.

[0326] Even if the terminal is configured with multiple uplink control channel resources of PUCCH resource #m, the actual UCI transmission required uplink control channel resources can be less than the uplink control channel resources configured for PUCCH resource #m. In this case, the terminal transmits UCI by selecting some of the configured multiple resources. Method C is a method in which the terminal configures information on the uplink control channel resources used for actual UCI transmission in multiple uplink control channel resources or corresponding indexes through a higher signal if the actual UCI transmission required uplink control channel resources is less than the configured uplink control channel resources. For example, the terminal can configure two uplink control channel resources (interleaving 0 and interleaving 1) included in PUCCH resource #m through a higher signal. In addition, if the actual UCI transmission required uplink control channel resources is less than the multiple configured uplink control channel resources, the terminal can configure the uplink control channel resources or corresponding index information (e.g., interleaving 1) for UCI transmission. In other words, if one uplink control channel resource is required for actual UCI transmission through PUCCH #m, the terminal can transmit actual UCI using the uplink control channel resource (interleaving 1) configured through the higher signal of the two uplink control channel resources (interleaving 0 and interleaving 1) configured on PUCCH #m. The uplink control channel resource or index information (or priority uplink control channel resource or index) to be used for actual UCI transmission can be indicated to the terminal from the base station through DCI.

[0327] [5th Embodiment]

[0328] In this embodiment, a method in which a base station and a terminal support multiple frequency resource allocation schemes is proposed. According to the method, if the terminal transmits a sounding reference signal (SRS) to the base station, the terminal determines a transmission frequency resource allocation scheme for the sounding reference signal.

[0329] Method 5-1: Configuring a transmission frequency resource allocation scheme of an uplink control channel through system information or a higher signal

[0330] Hereinafter, method 5-1 will be described in more detail. Method 5-1 is a method in which the base station indicates or configures the transmission frequency resource allocation scheme of the sounding reference signal to the terminal through system information or a higher signal. Since the base station indicates or configures the transmission frequency resource allocation scheme of the sounding reference signal through system information, all terminals can transmit the sounding reference signal in the same frequency resource allocation scheme in the bandwidth part in which the sounding reference signal is transmitted. In this case, the transmission frequency resource allocation scheme of the sounding reference signal can be included in sounding reference signal-related configuration information (e.g., srs-config) to be transmitted to the terminal. In this case, a default frequency allocation scheme between the base station and the terminal can be defined in advance. For example, a first scheme can be a default transmission frequency resource allocation scheme of the sounding reference signal, and a frequency resource allocation scheme of a scheme other than the first scheme (e.g., a frequency resource allocation scheme of a second scheme) can be enabled through system information or a higher signal. If the frequency resource allocation scheme of the scheme other than the first scheme (e.g., the second scheme) is not enabled through system information or a higher signal, in other words, if the frequency resource allocation scheme of the second scheme is disabled, the terminal can determine the transmission frequency resource allocation scheme of the sounding reference signal to be the default frequency resource allocation scheme.

[0331] If the frequency resource allocation scheme of the second scheme is enabled, the terminal determines the second scheme as the transmission frequency resource allocation scheme of the sounding reference signal. In this case, if the frequency resource allocation scheme of the second scheme is enabled, the terminal can also determine both the first scheme and the second scheme as the transmission frequency resource allocation scheme of the sounding reference signal, and in this case, the transmission frequency resource allocation scheme that should be used by the terminal during the transmission of the sounding reference signal can be indicated through DCI for indicating or scheduling an uplink control channel (in other words, DCI for indicating the transmission of the sounding reference signal), or the transmission frequency resource allocation scheme can be determined through at least one of the other methods proposed in Embodiment 5. Here, the DCI for indicating or scheduling the transmission of the sounding reference signal can mean a case where one field indicates, requests, or triggers the transmission of the sounding reference signal in DCI for scheduling the reception of a downlink data channel (PDSCH) transmitted by the base station, DCI for scheduling the transmission of an uplink data channel (PUSCH), UL grant information, or group-common DCI for indicating the transmission of the sounding reference signal to one or more terminals.

[0332] Further, the transmission frequency resource allocation scheme of the sounding reference signal can be configured for a sounding reference signal resource or a set of sounding reference signal resources configured through system information or a higher signal. That is, the base station can configure the frequency resource allocation scheme of the sounding reference signal resource #0 and the sounding reference signal #1 such that the frequency resource allocation schemes of the sounding reference signal resource #0 and the sounding reference signal resource #1 are the same as or different from each other.

[0333] Method 5-2: Determining resource allocation scheme according to waveform configuration of uplink data channel

[0334] The terminal can determine the resource allocation scheme of the sounding reference signal according to the waveform configuration of the uplink data channel scheduled through the RAR UL grant or the UL grant. For example, if the waveform of the uplink data channel is configured as a DFT-s-OFDM waveform, the terminal can determine that the resource allocation of the sounding reference signal corresponds to the first scheme. If the waveform of the uplink data channel is configured as a CP-OFDM waveform, the terminal can determine that the resource allocation of the sounding reference signal corresponds to the second scheme.

[0335] Similarly, the terminal can determine the resource allocation scheme of the sounding reference signal according to the waveform configuration of the uplink control channel. For example, if the waveform of the uplink data channel is configured as a DFT-s-OFDM waveform, the terminal can determine that the resource allocation of the sounding reference signal corresponds to the first scheme. If the waveform of the uplink data channel is configured as a CP-OFDM waveform, the terminal can determine that the resource allocation of the sounding reference signal corresponds to the second scheme. If one or more waveforms are used to transmit the uplink control channel according to the format of the uplink control channel, the terminal can determine the resource allocation scheme of the sounding reference signal according to the waveform configuration of the uplink data channel.

[0336] Method 5-3: Indicating resource allocation scheme through DCI

[0337] Method 5-3 is a method of determining a resource allocation scheme of a sounding reference signal by including a sounding reference signal transmission request field (SRS request field) in DCI indicating transmission of a sounding reference signal. For example, a field indicating a value of a resource allocation scheme is introduced in the value of the sounding reference signal transmission request field, and the terminal can determine the resource allocation scheme of the indicated or scheduled sounding reference signal according to the field value. For example, a resource allocation type indicator of one bit in size can be added separately to the DCI for indicating or requesting transmission of a sounding reference signal, or an indicator of one bit in size can be added to the field indicating transmission of a sounding reference signal (SRS request field), and if the field value is 0, the field value can indicate that the resource allocation scheme of the sounding reference signal is the first scheme, and if the field value is 1, the field value can indicate that the resource allocation scheme of the sounding reference signal is the second scheme. In this case, the resource allocation scheme indicated by the name and size of the field and the bit value is only exemplary.

[0338] Method 5-4: Determining a transmission frequency resource allocation scheme depending on whether an uplink control channel is transmitted within a channel occupancy time of a base station

[0339] Hereinafter, method 5-4 will be described in more detail. Method 5-4 is a method of determining a transmission frequency resource allocation scheme of a sounding reference signal depending on whether a sounding reference signal is transmitted within a channel occupancy time of a base station. Through this method, the transmission frequency resource allocation scheme of the sounding reference signal can be the same as or different from each other depending on whether the sounding reference signal is transmitted within the channel occupancy time of the base station or within a time other than the channel occupancy time of the base station, and thus, the transmission frequency resource allocation scheme of the sounding reference signal can be the same as or different from the transmission frequency resource allocation scheme of the sounding reference signal indicated or configured by at least one of method 5-1, method 5-2, and method 5-3.

[0340] Preferably, the base station controls the uplink signal transmission of the terminal within the channel occupancy time in which the base station accesses and uses the channel after performing the channel access procedure. For example, the base station can transmit an UL grant to one or more terminals on a downlink control channel, and the terminal that has received the UL grant can transmit an uplink data channel according to the UL grant. In addition, the base station can indicate to transmit an uplink control channel (PUCCH) or a data channel (PUSCH) to one or more terminals, and can multiplex the uplink signal and channel. Accordingly, the base station needs to effectively multiplex the uplink signal and channel transmitted by the terminal within at least one time slot or transmission time interval by having the same resource allocation scheme for the uplink signal and channel at least within the channel occupancy time of the base station. Therefore, there is a need for a method of independently configuring a transmission frequency resource allocation scheme depending on whether at least an uplink control channel is transmitted within the channel occupancy time of the base station.

[0341] For example, the terminal can transmit the sounding reference signal using a transmission resource allocation scheme (e.g., a first scheme) in case of transmitting the sounding reference signal within the channel occupancy time of the base station and a transmission resource allocation scheme (e.g., a second scheme) in case of transmitting the sounding reference signal at a time other than the channel occupancy time of the base station. In this case, the transmission resource allocation scheme in case of transmitting the sounding reference signal at a time other than the channel occupancy time of the base station can be pre-defined between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., a first scheme) in case of transmitting the sounding reference signal within the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal or DCI for indicating or requesting transmission of the sounding reference signal. Similarly, the transmission resource allocation scheme in case of transmitting the sounding reference signal within the channel occupancy time of the base station can be pre-defined between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., a first scheme) in case of transmitting the sounding reference signal at a time other than the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal or DCI for indicating or requesting transmission of the sounding reference signal. In this case, the transmission resource allocation scheme (e.g., a second scheme) in case of transmitting the sounding reference signal at a time other than the channel occupancy time of the base station can be configured through DCI for indicating or requesting transmission of the sounding reference signal, and the transmission resource allocation scheme (e.g., a first scheme) in case of transmitting the sounding reference signal within the channel occupancy time of the base station can be configured or enabled through system information or a higher signal. Similarly, the transmission resource allocation scheme (e.g., a first scheme) in case of transmitting the sounding reference signal within the channel occupancy time of the base station can be configured through DCI for indicating or requesting transmission of the sounding reference signal, and the transmission resource allocation scheme (e.g., a second scheme) in case of transmitting the sounding reference signal at a time other than the channel occupancy time of the base station can be configured or enabled through system information or a higher signal.

[0342] Furthermore, if the terminal is not configured with a transmission resource allocation scheme in a case where the sounding reference signal is transmitted in a time other than the channel occupancy time of the base station, or if the transmission resource allocation scheme is not enabled, the terminal can even apply the transmission resource allocation scheme in a case where the sounding reference signal is transmitted in the channel occupancy time of the base station to a case where the sounding reference signal is transmitted in a time other than the channel occupancy time of the base station. Similarly, the transmission resource allocation scheme in a case where the sounding reference signal is transmitted in the channel occupancy time of the base station can be defined in advance between the base station and the terminal (e.g., a default resource allocation scheme), and the transmission resource allocation scheme (e.g., a first scheme) in a case where the sounding reference signal is transmitted in a time other than the channel occupancy time of the base station can be configured or enabled by the base station through system information or a higher signal. In this case, if the terminal is not configured with the transmission resource allocation scheme in a case where the sounding reference signal is transmitted in a time other than the channel occupancy time of the base station, or if the scheme is not enabled, the terminal can even apply the transmission resource allocation scheme in a case where the sounding reference signal is transmitted in the channel occupancy time of the base station to a case where the sounding reference signal is transmitted in a time other than the channel occupancy time of the base station.

[0343] As described above, the terminal can determine a transmission resource allocation scheme (e.g., a first scheme) in a case where the sounding reference signal is transmitted in the channel occupancy time of the base station and a transmission resource allocation scheme (e.g., a second scheme) in a case where the sounding reference signal is transmitted in a time other than the channel occupancy time of the base station, and the terminal can determine whether the uplink data channel transmission time or transmission slot is a time within the channel occupancy time of the base station or a time other than the channel occupancy time, and the terminal can transmit the sounding reference signal through the correct transmission resource allocation scheme according to the result of the determination. In this case, the terminal can determine whether the base station occupies the channel or the base station accesses the channel depending on whether the reference signal (e.g., DMRS) transmitted by the base station is detected, or the terminal can determine whether the base station occupies the channel by receiving information about whether the base station accesses the channel or information about the channel occupancy time of the base station transmitted by the base station through the downlink control channel.

[0344] In this case, the information on whether the base station accesses the channel or the information on the channel occupancy time can not only consist of information on at least one bandwidth part and one transmission interval or slot, but also information on at least one of a plurality of bandwidth parts and a plurality of slots. In addition, the information on whether the base station accesses the channel or the information on the channel occupancy time can consist of information on one or more sub-band units having a size smaller than the size of the bandwidth part or information on one or more mini-slots or transmission time intervals or symbols consisting of symbols smaller than the slot. Such information on whether the base station accesses the channel or the information on the channel occupancy time can refer to FIG. 9A.

[0345] Method 5-5: Using the same resource allocation scheme as the uplink data channel

[0346] Method 5-5 is a method in which the terminal transmits a sounding reference signal by applying the same scheme as the transmission frequency resource allocation scheme of the uplink data channel scheduled by the UL grant indicated or determined through one or more of the various methods according to Embodiment 3 of the disclosure. The advantage of Method 5-5 is that additional information for indicating or configuring the transmission frequency resource allocation scheme of the sounding reference signal is not required, and according to this method, all uplink data channels and sounding reference signals can use the same transmission frequency resource allocation scheme. In particular, if the uplink data channel and the sounding reference signal are continuously transmitted, the uplink data channel and the sounding reference signal are caused to use the same transmission frequency resource allocation scheme, thereby making it possible to avoid unnecessary resource allocation scheme changes. In this case, Method 5-5 can further include a method in which the terminal transmits a sounding reference signal by applying the same scheme as the transmission frequency allocation scheme of the uplink control channel scheduled by the RAR UL grant indicated or determined through one or more of the various methods of Embodiment 2 and Embodiment 3 of the disclosure.

[0347] According to various embodiments of the disclosure, although a method for determining a resource allocation scheme of an uplink signal or channel has been provided, a resource allocation scheme of one or more uplink signals or channels can also be determined by combining and modifying one or more embodiments. Further, in the disclosure, although a method for determining a resource allocation scheme of a corresponding uplink signal or channel has been described assuming that the resource allocation scheme of the corresponding uplink signal or channel is independently indicated or configured, the resource allocation scheme of the uplink signal or channel can be commonly applied to all uplink signals or channels transmitted in an uplink carrier, an uplink cell, or an uplink bandwidth part, and in this case, a resource allocation scheme of an uplink signal or channel indicated or configured in the uplink carrier, the uplink cell, or the uplink bandwidth part can be applied instead of being indicated or configured for the corresponding uplink signal or channel.

[0348] In the disclosure, although a method for determining a resource allocation scheme of a corresponding uplink signal or channel according to a waveform configuration configured or defined in the corresponding uplink signal or channel is provided, a waveform configuration of an uplink signal or channel can be commonly applied to all uplink signals or channels transmitted in an uplink carrier, an uplink cell, or an uplink bandwidth part. In this case, the waveform configuration of the uplink signal or channel can be a waveform configuration of an uplink signal or channel indicated or configured in the uplink carrier, the uplink cell, or the uplink bandwidth part instead of being configured for the uplink signal or channel, and a resource allocation scheme of a corresponding uplink signal or channel can be determined based on the configured waveform.

[0349] Further, in the disclosure, a default transmission frequency resource allocation manner between a base station and a terminal means that a frequency resource allocation scheme of part or all of uplink signals or channels has been defined in advance between the base station and the terminal. In this case, the default transmission frequency resource allocation scheme can be one of uplink resource allocation type 0, uplink resource allocation type 1, and uplink resource allocation type 2 or a combination and modification of a resource allocation scheme, and the default transmission frequency resource allocation scheme can be determined according to an uplink transmission signal or channel or a waveform of the uplink transmission signal or channel.

[0350] Figure 10 is a flowchart of a method of determining allocation of frequency domain resources by a base station in a wireless communication system according to an embodiment of the disclosure. The base station determines allocation of frequency domain resources in operation S1010. Figure 1 The base station 110 of FIG. 1 is an example.

[0351] Referring to Figure 10At operation 1000, the base station can determine a frequency resource allocation scheme for uplink signals and channels. For example, the frequency resource allocation scheme for uplink signals and channels can be the same as or different from each other depending on whether the uplink signals and channels are signals and channels transmitted in an unlicensed band or a licensed band. For example, if the uplink signals and channels are signals and channels transmitted in an unlicensed band, a method including uplink frequency resource allocation Type 1, Type 2, or Type 3 according to the disclosure can be used as the frequency resource allocation scheme for the uplink signals and channels. If the uplink signals and channels are signals and channels transmitted in a licensed band, a method including uplink frequency resource allocation Type 0 and Type 1 according to the disclosure can be used as the frequency resource allocation scheme for the uplink signals and channels. Also, at operation 1000, the base station can configure configuration information required for transmitting / receiving the uplink signals and channels including bandwidth part-related configurations. In this case, the base station can indicate or configure the frequency resource allocation scheme for the uplink signals and channels of the terminal according to various embodiments and methods of the disclosure.

[0352] Thereafter, at operation 1010, the base station can transmit the configuration information required for transmitting / receiving the uplink signals and channels configured by the system information, a system information block (SIB), or a higher signal to one or more terminals. Thereafter, at operation 1020, the base station can transmit downlink signals and channels to the terminal or receive uplink signals and channels from the terminal according to the configuration information required for transmitting / receiving the uplink signals and channels configured.

[0353] Figure 11 is a flowchart of a method for a terminal to determine allocated frequency domain resources in a wireless communication system according to an embodiment of the disclosure. The terminal determines allocated frequency domain resources in a wireless communication system according to the disclosure. Figure 1 The terminal 120 or 130 of FIG. 1 is taken as an example.

[0354] Referring to Figure 11At operation 1100, the terminal can receive, from the base station, configuration information about a frequency resource allocation scheme for uplink signals and channels configured by the base station through at least one of a system information block and a higher signal. In this case, the frequency resource allocation scheme for uplink signals and channels can be the same as or different from each other depending on whether the uplink signals and channels are signals and channels transmitted in an unlicensed band or a licensed band. More specifically, if the uplink signals and channels are signals and channels transmitted in an unlicensed band, the base station can configure a method including uplink frequency resource allocation Type 1, Type 2, or Type 3 according to the present disclosure as the frequency resource allocation scheme for the uplink signals and channels. If the uplink signals and channels are signals and channels transmitted in a licensed band, a method including uplink frequency resource allocation Type 0 and Type 1 according to the present disclosure can be configured as the frequency resource allocation scheme for the uplink signals and channels. Also, at operation 1100, the terminal can receive configuration information required for transmission / reception of the uplink signals and channels configured by the base station including bandwidth part-related configuration. Thereafter, at operation 1110, the terminal can configure variables required for transmission of the uplink signals and channels including the frequency resource allocation scheme according to the configuration information received at operation 1100. At operation 1120, the terminal can transmit the uplink signals and channels according to the frequency resource allocation type configured at operation 1110.

[0355] Figure 12 is another flowchart of a method for a terminal to determine allocation of frequency domain resources in a wireless communication system according to an embodiment of the present disclosure. The terminal determines, in operation 1200, a frequency resource allocation scheme for uplink signals and channels configured by a base station through at least one of a system information block and a higher signal. In this case, the frequency resource allocation scheme for uplink signals and channels can be the same as or different from each other depending on whether the uplink signals and channels are signals and channels transmitted in an unlicensed band or a licensed band. More specifically, if the uplink signals and channels are signals and channels transmitted in an unlicensed band, the base station can configure a method including uplink frequency resource allocation Type 1, Type 2, or Type 3 according to the present disclosure as the frequency resource allocation scheme for the uplink signals and channels. If the uplink signals and channels are signals and channels transmitted in a licensed band, a method including uplink frequency resource allocation Type 0 and Type 1 according to the present disclosure can be configured as the frequency resource allocation scheme for the uplink signals and channels. Figure 1 The terminal 120 or 130 of FIG. 1 is an example.

[0356] Reference is made to Figure 12 At operation 1200, the terminal can receive, from the base station, configuration information about a frequency resource allocation scheme for uplink signals and channels configured by the base station through at least one of a system information block and a higher signal. In this case, the frequency resource allocation scheme for uplink signals and channels can be the same as or different from each other depending on whether the uplink signals and channels are signals and channels transmitted in an unlicensed band or a licensed band. More specifically, if the uplink signals and channels are signals and channels transmitted in an unlicensed band, the base station can configure a method including uplink frequency resource allocation Type 1, Type 2, or Type 3 according to the present disclosure as the frequency resource allocation scheme for the uplink signals and channels. If the uplink signals and channels are signals and channels transmitted in a licensed band, a method including uplink frequency resource allocation Type 0 and Type 1 according to the present disclosure can be configured as the frequency resource allocation scheme for the uplink signals and channels.

[0357] If the uplink signals and channels are transmitted in the unlicensed band, the terminal can be configured with a frequency resource allocation scheme of the uplink signals or channels in a case where the uplink signals and channels are transmitted within the channel occupancy time of the base station and a frequency resource allocation scheme of the uplink signals or channels in a case where the uplink signals and channels are transmitted at a time other than the channel occupancy time of the base station. In this case, the frequency resource allocation scheme of the uplink signals and channels can follow the frequency resource allocation scheme of the uplink data channel scheduled by the default frequency resource allocation type or the preamble or the RAR UL grant at least one of in the case where the uplink signals and channels are transmitted within the channel occupancy time of the base station and in the case where the uplink signals and channels are transmitted at a time other than the channel occupancy time of the base station (e.g., the signals and channels are transmitted at a time other than the channel occupancy time of the base station), and also can allocate the frequency resource allocation scheme of the uplink signals or channels with respect to the other case (e.g., the signals and channels are transmitted within the channel occupancy time of the base station).

[0358] Further, at operation 1200, the terminal can receive configuration information required for transmission / reception of the uplink signals and channels configured by the base station including the bandwidth part-related configuration. Thereafter, at operation 1210, the terminal can identify and configure variables required for transmission of the uplink signals and channels including the frequency resource allocation scheme according to the configuration information received at operation 1100. Thereafter, the terminal can transmit the uplink signals and channels according to the frequency resource allocation scheme configured at operation 1210.

[0359] Further, at operation 1220, the terminal determines whether the transmission of the uplink signals or channels is a transmission at a time within the channel occupancy time of the base station. If the uplink signals or channels are transmitted at a time or a time slot within the channel occupancy time of the base station, at operation 1240, the terminal transmits the signals according to the frequency resource allocation scheme of the uplink signals or channels determined at operation 1200 to be transmitted at a time or a time slot within the channel occupancy time of the base station. If the uplink signals or channels are transmitted at a time or a time slot other than the channel occupancy time of the base station, at operation 1230, the terminal transmits the signals according to the frequency resource allocation scheme of the uplink signals or channels determined at operation 1200 to be transmitted at a time or a time slot other than the channel occupancy time of the base station.

[0360] In the disclosure, although the expressions "equal to or greater than" and "equal to or less than" have been used to determine whether a certain condition (or reference) is satisfied, this is only for the description of the embodiments and does not exclude the description of "more than" or "less than". The condition described as "equal to or greater than" can be replaced with "more than", the condition described as "equal to or less than" can be replaced with "less than", and the condition described as "equal to or greater than and less than" can be replaced with "more than and equal to or less than".

[0361] The method according to the embodiments described in the claims and specification of the disclosure can be implemented in the form of hardware, software, or a combination of hardware and software.

[0362] In the case of implementation by software, a computer-readable storage medium storing one or more programs (software modules) can be provided. The one or more programs stored in the computer-readable storage medium are configured to be executed by one or more processors in an electronic device. The one or more programs include instructions that cause the electronic device to perform the methods according to the embodiments described in the claims or specification of the disclosure.

[0363] Such programs (software modules or software) can be stored in a non-volatile memory including a random access memory and a flash memory, a read only memory (ROM), an electrically erasable programmable read only memory (EEPROM), a magnetic disc storage device, an optical compact disc-ROM (CD-ROM), a digital versatile disc (DVD), or other types of optical storage devices, or a magnetic tape. In addition, programs can be stored in a memory constituted by a combination of some or all of them. In addition, a plurality of memories can be included.

[0364] In addition, programs can be stored in an attachable storage device that is accessible through a communication network such as the Internet, an intranet, a local area network (LAN), a wide area network (WLAN), or a storage area network (SAN) or a communication network constituted by a combination of them. The storage device can be accessed by the device executing the embodiments of the disclosure through an external port. In addition, a separate storage device on the communication network can access the device executing the embodiments of the disclosure.

[0365] The disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The disclosure is applicable to smart services based on 5G communication technologies and IoT-related technologies, such as smart homes, smart buildings, smart cities, smart cars, interconnected cars, health, digital education, smart retail, security, and safety services.

[0366] Embodiments described in the specification have been described individually, but two or more embodiments can be combined and practiced. For example, part of the methods proposed in the disclosure can be combined with each other to operate a base station and a terminal. Also, the embodiments described above are proposed based on a 5G or NR system, but other modifications based on the technical concept of the embodiments will be applicable to other systems such as LTE, LTE-A, and LTE-A-Pro systems.

[0367] While the disclosure has been shown and described with reference to various embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents.

Claims

1. A method performed by a terminal in a communication system, the method comprising: The configuration information of the Physical Uplink Control Channel (PUCCH) resource received from the base station includes an index of a first interleaving resource for the PUCCH resource. Based on the configuration information, a first interleaving resource and a second interleaving resource for the PUCCH resource are determined from among multiple interleaving resources; and Using either the first interleaving resource or both the first interleaving resource and the second interleaving resource, uplink control information is sent to the base station on the PUCCH corresponding to the PUCCH resource. The interleaved resource consists of multiple resource blocks, and the intervals between each resource block and subsequent resource blocks are the same. The index of the second interleaving resource corresponds to the value obtained by modulo operation using the index of the first interleaving resource and an offset that is one of the predetermined integers.

2. The method according to claim 1, wherein, Information associated with the index of the second interleaved resource is included in the configuration information, and The configuration information is received via higher-layer signaling.

3. The method according to claim 1, further comprising: Based on whether the code rate of the uplink control information is equal to or greater than the code rate determined for transmitting the uplink control information, a first interleaving resource or both the first interleaving resource and the second interleaving resource are determined.

4. The method according to claim 3, wherein, If the code rate of the uplink control information is equal to or greater than the code rate determined for transmitting the uplink control information, then the first interleaving resource is determined to be used for transmitting the uplink control information. Wherein, if the code rate of the uplink control information is less than the code rate determined for transmitting the uplink control information, the first interleaving resource and the second interleaving resource are determined to be used for transmitting the uplink control information.

5. A method performed by a base station in a communication system, the method comprising: A first interleaving resource and a second interleaving resource are determined from multiple interleaving resources for receiving the Physical Uplink Control Channel (PUCCH) resource; Send configuration information for PUCCH resources to the terminal, wherein the configuration information includes an index of the first interleaving resource; and Using either the first interleaving resource or both the first interleaving resource and the second interleaving resource, uplink control information is received from the terminal on the PUCCH corresponding to the PUCCH resource. The interleaved resource consists of multiple resource blocks, and the intervals between each resource block and subsequent resource blocks are the same. The index of the second interleaving resource corresponds to the value obtained by modulo operation using the index of the first interleaving resource and an offset that is one of the predetermined integers.

6. The method according to claim 5, wherein, Information associated with the index of the second interleaved resource is included in the configuration information, and The configuration information is sent via higher-layer signaling.

7. The method according to claim 5, further comprising: The first interleaving resource or both the first interleaving resource and the second interleaving resource are determined based on whether the code rate of the uplink control information is equal to or greater than the code rate determined for transmitting the uplink control information.

8. The method according to claim 7, in, If the code rate of the uplink control information is equal to or greater than the code rate determined for transmitting the uplink control information, then the first interleaving resource is determined to be used for transmitting the uplink control information. Wherein, if the code rate of the uplink control information is less than the code rate determined for transmitting the uplink control information, the first interleaving resource and the second interleaving resource are determined to be used for transmitting the uplink control information.

9. A terminal in a communication system, the terminal comprising: transceiver; and The controller, coupled to the transceiver, is configured as follows: The system receives configuration information for Physical Uplink Control Channel (PUCCH) resources from the base station, wherein the configuration information includes an index of a first interleaving resource for the PUCCH resources. Based on the configuration information, a first interleaving resource and a second interleaving resource for the PUCCH resource are determined from among multiple interleaving resources, and Using either the first interleaving resource or both the first interleaving resource and the second interleaving resource, uplink control information is sent to the base station on the PUCCH corresponding to the PUCCH resource. The interleaved resource consists of multiple resource blocks, and the intervals between each resource block and subsequent resource blocks are the same. The index of the second interleaving resource corresponds to the value obtained by modulo operation using the index of the first interleaving resource and an offset that is one of the predetermined integers.

10. The terminal according to claim 9, wherein, Information associated with the index of the second interleaved resource is included in the configuration information, and The configuration information is received via higher-layer signaling.

11. The terminal according to claim 9, wherein, The controller is also configured to: Based on whether the code rate of the uplink control information is equal to or greater than the code rate determined for transmitting the uplink control information, a first interleaving resource or both the first interleaving resource and the second interleaving resource are determined.

12. The terminal according to claim 11, in, If the code rate of the uplink control information is equal to or greater than the code rate determined for transmitting the uplink control information, then the first interleaving resource is determined to be used for transmitting the uplink control information. Wherein, if the code rate of the uplink control information is less than the code rate determined for transmitting the uplink control information, the first interleaving resource and the second interleaving resource are determined to be used for transmitting the uplink control information.

13. A base station in a communication system, the base station comprising: transceiver; and The controller, coupled to the transceiver, is configured as follows: Among multiple interleaving resources, a first interleaving resource and a second interleaving resource are determined for receiving the Physical Uplink Control Channel (PUCCH) resource. Send configuration information for PUCCH resources to the terminal, wherein the configuration information includes an index of the first interleaving resource; and Using either the first interleaving resource or both the first interleaving resource and the second interleaving resource, uplink control information is received from the terminal on the PUCCH corresponding to the PUCCH resource. The interleaved resource consists of multiple resource blocks, and the intervals between each resource block and subsequent resource blocks are the same. The index of the second interleaving resource corresponds to the value obtained by modulo operation using the index of the first interleaving resource and an offset that is one of the predetermined integers.

14. The base station according to claim 13, wherein, Information associated with the index of the second interleaved resource is included in the configuration information, and The configuration information is sent via higher-layer signaling.

15. The base station according to claim 13, wherein, The first interleaving resource or both the first interleaving resource and the second interleaving resource are determined based on whether the code rate of the uplink control information is equal to or greater than the code rate determined for transmitting the uplink control information.

16. The base station according to claim 15, wherein, If the code rate of the uplink control information is equal to or greater than the code rate determined for transmitting the uplink control information, then the first interleaving resource is determined to be used for transmitting the uplink control information. Wherein, if the code rate of the uplink control information is less than the code rate determined for transmitting the uplink control information, the first interleaving resource and the second interleaving resource are determined to be used for transmitting the uplink control information.

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