Method and apparatus for transmitting and receiving a signal in a wireless communication system

Abstract

The disclosure relates to a method and apparatus for transmitting and receiving a signal in a wireless communication system. An operation method of a terminal in a wireless communication system includes receiving, from a base station, information related to a position of a symbol in which a synchronization signal block is transmitted in a time domain, determining whether a position of a symbol configured to transmit an uplink signal overlaps with the position of the symbol in which the synchronization signal block is transmitted in the time domain, in a case where the position of the symbol configured to transmit the uplink signal overlaps with the position of the symbol in which the synchronization signal block is transmitted in the time domain, determining whether a time or frequency division duplex (XDD) related indicator is configured or received, and transmitting, to the base station, the uplink signal based on a result of the determination of whether the XDD related indicator is configured or received.

Description

Technical Field

[0001] The present disclosure relates to a method and apparatus for transmitting and receiving signals in a wireless communication system. Background Art

[0002] In order to meet the growing demand for wireless data services after the commercialization of the 4th generation (4G) communication system, efforts have been made to develop the 5th generation (5G) or pre-5G (pre-5G) communication system. For this reason, the 5G or pre-5G communication system is called a super 4G network communication system or a post-long term evolution (post-LTE) system. In order to achieve high data rates, it is considered to implement the 5G communication system in the millimeter wave (mmW) band (for example, the 60GHz band). In order to reduce the path loss of radio waves and increase the transmission distance of radio waves in the ultra-high frequency band, various technologies such as beamforming, massive multiple input multiple output (massive MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming and massive antennas are being studied for the 5G communication system. In order to improve the system network, various technologies such as evolved small cells, advanced small cells, cloud radio access networks (cloud-RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, coordinated multi-point (CoMP) and receive interference cancellation have been developed for the 5G communication system. In addition, for 5G communication systems, advanced coding and modulation (ACM) schemes such as hybrid frequency shift keying (FSK) and quadrature amplitude modulation (QAM) modulation (FQAM) and sliding window superposition coding (SWSC) have been developed, as well as enhanced network access schemes such as filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code division multiple access (SCMA).

[0003] The Internet has evolved from a human-based connected network, where humans generate and consume information, to the Internet of Things (IoT), where distributed elements such as objects exchange information with each other for processing. The Internet of Everything (IoE) technology has emerged, combining IoT technology with technologies for processing big data, such as by connecting to cloud servers. Implementing the IoT requires technological elements such as sensing, wired / wireless communications, network infrastructure, service interface technology, and security. Consequently, recent research has focused on technologies for inter-object connectivity, such as sensor networks, machine-to-machine (M2M) communication, and machine-type communication (MTC). Within the IoT, intelligent Internet technology (IT) services can be provided to collect and analyze data obtained from connected objects, creating new value in human life. With the integration and combination of existing information technology (IT) and various industries, the IoT can be applied to a variety of fields, such as smart homes, smart buildings, smart cities, smart cars or connected vehicles, smart grids, healthcare, smart appliances, and advanced medical services.

[0004] Therefore, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, machine-to-machine communication, or machine-to-communication (MTC) are being implemented using 5G communication technologies such as beamforming, multiple-input multiple-output (MIMO), or array antennas. Cloud Radio Access Network (Cloud-RAN), as an application of the aforementioned big data processing technology, may also be an example of the convergence of 3eG communication and IoT technologies.

[0005] As wireless communication systems develop, various services can be provided, and thus methods for efficiently providing these services are needed. Summary of the Invention

[0006] Technical Solution

[0007] The present disclosure provides efficient channel and signal transmission and reception methods and apparatus for various services in a mobile communication system.

[0008] Beneficial effects

[0009] The disclosed embodiments provide efficient channel and signal transmission and reception methods and apparatus in a mobile communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 2 is a diagram showing a basic structure of a time-frequency domain as a radio resource domain of a 5th generation (5G) system according to an embodiment of the present disclosure.

[0011] Figure 2 is a diagram showing the structure of a time slot considered in a 5G system according to an embodiment of the present disclosure.

[0012] Figure 3 is a diagram showing a synchronization signal block considered in a 5G communication system according to an embodiment of the present disclosure.

[0013] Figure 4 is a diagram illustrating a transmission situation of a synchronization signal block (SSB) in a frequency band of 6 GHz or lower considered in a 5G communication system according to an embodiment of the present disclosure.

[0014] Figure 5 is a diagram illustrating a transmission situation of a synchronization signal block in a frequency band of 6 GHz or higher considered in a 5G communication system according to an embodiment of the present disclosure.

[0015] Figure 6 2 is a diagram illustrating a transmission situation of a synchronization signal block according to a subcarrier spacing (SCS) within 5 ms according to an embodiment of the present disclosure.

[0016] Figure 7 2 is a diagram showing synchronization signal block information actually transmitted through system information in a 5G communication system according to an embodiment of the present disclosure.

[0017] Figure 8 is a diagram illustrating a 4-step random access procedure according to an embodiment of the present disclosure.

[0018] Figure 9 is a diagram illustrating an uplink-downlink configuration considered in a 5G communication system according to an embodiment of the present disclosure.

[0019] Figure 10 is a diagram illustrating an uplink-downlink configuration of a time or frequency (X) division duplex (DD) system according to an embodiment of the present disclosure, in which uplink resources and downlink resources are flexibly divided in the time domain and the frequency domain.

[0020] Figure 11 is a diagram illustrating an example of a frame structure of a configuration of a terminal in an XDD system according to an embodiment of the present disclosure.

[0021] Figure 12 is a diagram illustrating a method in which a terminal determines whether to transmit an uplink channel and signal according to an embodiment of the present disclosure.

[0022] Figure 13 is a diagram illustrating another method for a terminal to determine whether to transmit an uplink channel and signal according to an embodiment of the present disclosure.

[0023] Figure 14 is a diagram illustrating another method for a terminal to determine whether to transmit an uplink channel and signal according to an embodiment of the present disclosure.

[0024] Figure 15is a diagram illustrating another method for a terminal to determine whether to transmit an uplink channel and signal according to an embodiment of the present disclosure.

[0025] Figure 16 is a diagram illustrating a method in which a terminal determines whether to receive a downlink channel and signal according to an embodiment of the present disclosure.

[0026] Figure 17 is a diagram illustrating another method for a terminal to determine whether to receive a downlink channel and signal according to an embodiment of the present disclosure.

[0027] Figure 18 is a diagram illustrating another method for a terminal to determine whether to receive a downlink channel and signal according to an embodiment of the present disclosure.

[0028] Figure 19 is a diagram illustrating a method in which a terminal determines whether to transmit an uplink channel and signal according to an embodiment of the present disclosure.

[0029] Figure 20 is a diagram illustrating another method for a terminal to determine whether to transmit an uplink channel and signal according to an embodiment of the present disclosure.

[0030] Figure 21 is a diagram illustrating another method for a terminal to determine whether to transmit an uplink channel and signal according to an embodiment of the present disclosure.

[0031] Figure 22 is a diagram illustrating another method for a terminal to determine whether to transmit an uplink channel and signal according to an embodiment of the present disclosure.

[0032] Figure 23 is a block diagram illustrating a terminal according to an embodiment of the present disclosure.

[0033] Figure 24 is a block diagram illustrating a base station according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] According to an embodiment of the present disclosure, an operating method of a terminal in a wireless communication system includes: receiving a system information block (SIB) or cell-specific configuration information from a base station; identifying a position of a synchronization signal block (SSB) sent by the base station in the time domain based on the SIB or the cell-specific configuration information; determining whether a transmission symbol of an uplink channel or signal overlaps with a position of the SSB sent by the base station in the time domain based on higher layer signaling or downlink control information (DCI); and sending the uplink channel or signal in the transmission symbol based on a result of the determination.

[0035] According to an embodiment of the present disclosure, an operating method of a terminal in a wireless communication system includes: receiving information related to the position of a symbol in the time domain from a base station, wherein a synchronization signal block is sent in the symbol, whether the position of a symbol configured to send an uplink signal overlaps with the position of a symbol in which the synchronization signal block is sent in the time domain, and in a case where the position of the symbol configured to send an uplink signal overlaps with the position of the symbol in which the synchronization signal block is sent in the time domain, determining whether a time or frequency division duplex (XDD) related indicator is configured or received, and sending an uplink signal to the base station based on the result of determining whether the XDD related indicator is configured or received.

[0036] In a case where the position of the symbol configured to send the uplink signal does not overlap with the position of the symbol where the synchronization signal block is sent in the time domain, the uplink signal can be sent to the base station at the position of the symbol configured to send the uplink signal.

[0037] According to an embodiment of the present disclosure, an operating method of a terminal in a wireless communication system includes: receiving information related to the position of a symbol in the time domain, in which a random access channel opportunity is configured, from a base station, determining whether the position of a symbol configured to receive a downlink signal overlaps with the position of a symbol in which the random access channel opportunity is configured in the time domain, and in a case where the position of the symbol configured to receive the downlink signal overlaps with the position of the symbol in which the random access channel opportunity is configured in the time domain, determining whether a time or frequency division duplex (XDD) related indicator is configured or received, and receiving a downlink signal from the base station based on a result of determining whether the XDD related indicator is configured or received.

[0038] When the position of the symbol configured to receive the downlink signal does not overlap with the position of the symbol in which the random access channel opportunity is configured in the time domain, the downlink signal can be received from the base station at the position of the symbol configured to receive the downlink signal.

[0039] According to an embodiment of the present disclosure, an operating method of a terminal in a wireless communication system includes: based on system information or high-layer signaling, identifying the position of a symbol configured as a downlink through uplink-downlink configuration information, determining whether the position of a symbol configured to send an uplink signal overlaps with the position of a symbol configured as a downlink in the time domain, and in a case where the position of the symbol configured to send an uplink signal overlaps with the position of a symbol configured as a downlink in the time domain, determining whether a time or frequency division duplex (XDD) related indicator is configured or received, and based on the result of determining whether the XDD related indicator is configured or received, sending an uplink signal to a base station.

[0040] In the case where the position of the symbol configured to transmit the uplink signal does not overlap with the position of the symbol configured for the downlink in the time domain, the uplink signal can be transmitted to the base station at the position of the symbol configured to transmit the uplink signal.

[0041] Implementation Method

[0042] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0043] In the following description of the embodiments of the present disclosure, descriptions of technologies that are well known in the art and not directly related to the present disclosure are omitted in order to clearly convey the gist of the present disclosure by omitting unnecessary descriptions.

[0044] For the same reason, some components in the accompanying drawings may be shown exaggeratedly, omitted or schematically shown. In addition, the size of each element may not reflect its actual size basically. In each accompanying drawing, the same or corresponding elements are represented by the same reference numerals.

[0045] With reference to the embodiments of the present disclosure described in detail below in conjunction with the accompanying drawings, the advantages and features of the present disclosure and the method for achieving the same will become apparent. However, the present disclosure is not limited to the embodiments disclosed below, but may be implemented in different forms, providing embodiments to achieve a complete disclosure and fully convey the scope of the present disclosure to those of ordinary skill in the art, and the present disclosure may be defined by the scope of the claims. In the specification, the same figure marks represent the same elements. In addition, in the following description of the present disclosure, in order to avoid unnecessarily obscuring the main points of the present disclosure, well-known functions or constructions are not described in detail. The terms used herein are defined with regard to the functions in the present disclosure and may vary according to the intention of the user or operator, precedents, etc. Therefore, the terms used herein must be defined based on the meaning of the terms and the descriptions throughout the specification.

[0046] In the following, a base station is an entity that allocates resources to a terminal and may be at least one of a gNode B, an eNode B, a node B, a base station (BS), a radio access unit, a base station controller, or a node on a network. The terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing a communication function. In the present disclosure, a downlink (DL) represents a wireless transmission path for a signal sent by a base station to a terminal, and an uplink (UL) represents a wireless transmission path for a signal sent by a terminal to a base station. In addition, although the embodiments of the present disclosure are described by using a long-term evolution (LTE) or an advanced long-term evolution (LTE-A) system as an example, the embodiments of the present disclosure may also be applied to other communication systems with similar technical backgrounds or channel forms. For example, the fifth generation (5G) new radio (NR) mobile communication technology developed after LTE-A may belong to it, and hereinafter, 5G may be represented as a concept including existing LTE, LTE-A, and other similar services. In addition, according to the judgment of a person skilled in the art, the embodiments of the present disclosure may be applied to other communication systems with some modifications without departing from the scope of the present disclosure.

[0047] It will be understood that each block of the flowchart illustration, as well as combinations of blocks in the flowchart illustration, can be implemented by computer program instructions. Because these computer program instructions can be loaded into a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, the instructions executed by the processor of the computer or other programmable data processing device generate components for implementing the functions specified in the (multiple) flowchart blocks. Because these computer program instructions can also be stored in a computer-usable or computer-readable memory that can direct the computer or other programmable data processing device to operate in a specific manner, the instructions stored in the computer-executable or computer-readable memory can produce an article of manufacture that includes instruction components for performing the functions specified in the (multiple) flowchart blocks. Because the computer program instructions can also be loaded onto a computer or other programmable data processing device, a series of operational steps can be executed on the computer or other programmable data processing device to produce a computer-implemented process. Therefore, the instructions executed on the computer or other programmable data processing device can provide steps for implementing the functions specified in the (multiple) flowchart blocks.

[0048] In addition, each block can represent a module, a code segment or a code portion, which includes one or more executable instructions for implementing (a plurality of) specific logical functions. It should also be noted that in some alternative embodiments, the functions mentioned in the blocks may not appear in order. For example, depending on the functions involved, two blocks shown in succession may actually be executed substantially simultaneously, or these blocks may sometimes be executed in reverse order.

[0049] The term "unit" used in this embodiment refers to a software or hardware component that performs a specific task, such as a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC). However, the term "unit" is not meant to be limited to software or hardware. The "unit" can be configured in an addressable storage medium, or it can be configured to operate one or more processors. Thus, for example, the "unit" can include components such as software components, object-oriented software components, class components and task components, processes, functions, attributes, procedures, subroutines, program code segments, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays and variables. The functions provided in the components and "units" can be combined into fewer components and "units", or can be further divided into additional components and "units". In addition, the components and "units" can be implemented to operate one or more central processing units (CPUs) in a device or a secure multimedia card. In addition, the "unit" in the embodiment can include one or more processors.

[0050] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Although the embodiments of the present disclosure are described by using the method and apparatus corresponding to the service for enhanced coverage as an example, the embodiments of the present disclosure can also be applied to methods for transmitting and receiving data channels, control channels, and reference signals corresponding to other additional services through one or more embodiments or a combination of some embodiments of the present disclosure. Therefore, according to the judgment of a person of ordinary skill in the art, the embodiments of the present disclosure can be applied with some modifications without departing from the scope of the present disclosure.

[0051] In addition, in the following description of the present disclosure, in order to avoid unnecessarily obscuring the main points of the present disclosure, well-known functions or configurations are not described in detail. The terms used herein are defined in consideration of the functions in the present disclosure and may vary depending on the intention of the user or operator, precedents, etc. Therefore, the terms used herein must be defined based on the meaning of the terms and the description throughout the specification.

[0052] Wireless communication systems have evolved from initial systems that provided voice-oriented services to broadband wireless communication systems that provide high-speed and high-quality packet data services, using communication standards such as 3rd 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), LTE-Pro, 3GPP2 High-Speed ​​Packet Data (HRPD), Ultra Mobile Broadband (UMB), and Institute of Electrical and Electronics Engineers (IEEE) 802.16e.

[0053] As a representative example of a broadband wireless communication system, the LTE system adopts an orthogonal frequency division multiplexing (OFDM) scheme for the downlink (DL) and a single-carrier frequency division multiple access (SC-FDMA) scheme for the uplink (UL). The term "uplink" refers to a radio link through which a terminal (e.g., user equipment (UE) or mobile station (MS)) sends data or control signals to a base station (e.g., eNode B (eNB) or BS), and the term "downlink" refers to a radio link through which a base station sends data or control signals to a terminal. The above-mentioned multiple access scheme can identify data or control information of different users in such a way that the time-frequency resources used to carry the data or control information of the users are allocated and managed so that they do not overlap with each other, that is, orthogonality between them is achieved.

[0054] As a post-LTE communication system, the 5G system should be able to freely reflect the various needs of users and service providers, and therefore should support services that meet various needs simultaneously. Services considered for the 5G system include enhanced mobile broadband (eMBB), massive machine-type communication (mMTC), and ultra-reliable low-latency communication (URLLC).

[0055] eMBB is designed to provide higher data rates than those supported by existing LTE, LTE-A, or LTE-Pro. For example, in a 5G communication system, from the perspective of the base station, eMBB should be able to provide a peak data rate of 20Gbps in the downlink and a peak data rate of 10Gbps in the uplink. In addition, the 5G communication system should be able to provide an increased user-perceived data rate of the terminal while providing peak data rates. In order to meet such requirements, various transmission and reception technologies, including further enhanced MIMO transmission technology, need to be improved in the 5G communication system. In addition, the LTE system transmits signals by using a maximum transmission bandwidth of 20 megahertz (MHz) in a frequency band of 2 gigahertz (GHz). In contrast, the 5G communication system transmits signals by using a frequency bandwidth wider than 20MHz in a frequency band of 3 to 6 GHz or higher, and therefore, can meet the data rate requirements required by the 5G communication system.

[0056] In addition, mMTC is considered to support application services such as the Internet of Things (IoT) in 5G communication systems. In order to provide IoT efficiently, mMTC needs to support access to a large number of terminals in a cell, improved battery time, reduced cost of terminals, etc. IoT is attached to various sensors and various devices to provide communication functions, and therefore, it should be able to support many terminals within a cell (e.g., 1,000,000 terminals / km2). In addition, due to the nature of the service, terminals that support mMTC may be located in shadow areas that are not covered by the cell, such as underground in a building, so the terminal requires a wider coverage range than other services provided by the 5G communication system. Terminals that support mMTC should be inexpensive terminals, and because it is difficult to frequently replace the battery of the terminal, the terminal requires a very long battery life (e.g., 10 to 15 years).

[0057] Finally, URLLC is a cellular-based wireless communication service for mission-critical applications. For example, URLLC can be used for remote control of robots or machines, industrial automation, unmanned aerial vehicles, remote healthcare, emergency alerts, etc. Therefore, the communication provided by URLLC should provide ultra-low latency and ultra-high reliability. For example, services supporting URLLC should meet air interface latency of less than 0.5 milliseconds and have a 10 -5 Therefore, for services supporting URLLC, the 5G system should provide a transmission time interval (TTI) that is smaller than that of other services and allocate a wide range of resources in the frequency band to ensure the reliability of the communication link.

[0058] Considering that three services for a 5G communication system (hereinafter, used interchangeably with the 5G system), namely eMBB, URLLC, and mMTC, can be multiplexed and transmitted in one system. In this case, in order to meet the different requirements of the services, different transmission and reception schemes and different transmission and reception parameters can be used between the services.

[0059] The terminal in the present disclosure may include a User Equipment (UE), a Mobile Station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing a communication function.

[0060] Furthermore, in this disclosure, a controller may be designated as a processor.

[0061] Furthermore, in this disclosure, a layer (or a layer entity) may be referred to as an entity.

[0062] The present disclosure relates to a method and apparatus for transmitting and receiving channels and signals in a wireless communication system. According to an embodiment, the wireless communication system may refer to a wireless communication system operating by using time division duplexing (TDD).

[0063] The present disclosure relates to a cellular wireless communication system, and to a method for a terminal to transmit an uplink channel and signal to a base station and a method for receiving a downlink channel and signal in a TDD system.

[0064] The present disclosure provides an efficient channel and signal sending / receiving method and apparatus in a mobile communication system, so that in a terminal and / or node to send and receive uplink and downlink channels / signals (channels and / or signals), the time domain resources of the uplink and downlink channels / signals are expanded to enhance coverage, and sending and receiving are performed efficiently.

[0065] The frame structure of the 5G system will be described in more detail with reference to the accompanying drawings.

[0066] Figure 1 2 is a diagram showing a basic structure of a time-frequency domain as a radio resource domain of a 5G system according to an embodiment of the present disclosure.

[0067] exist Figure 1 In the , the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. In the time domain and the frequency domain, the basic unit of resources is a resource element (RE) 101, and can be defined by one OFDM symbol 102 on the time axis and one subcarrier 103 on the frequency axis. In the frequency domain, (e.g., 12) consecutive REs may constitute a resource block (RB) 104. In addition, in the time domain, Consecutive OFDM symbols may constitute a subframe 110.

[0068] Figure 2 is a diagram showing the structure of a time slot considered in a 5G system according to an embodiment of the present disclosure.

[0069] Figure 2 An example of the structure of a frame 200, a subframe 201, and a time slot 202 is shown. One frame 200 may be defined as 10 ms. One subframe 201 may be defined as 1 ms, and thus, one frame 200 may include a total of 10 subframes 201. In addition, one time slot 202 or 203 may be defined by 14 OFDM symbols (i.e., the number of symbols per time slot is 14). ). One subframe 201 may include one or more time slots 202 and 203, and the number of time slots 202 and 203 in each subframe 201 may vary according to the configured values ​​μ 204 and 205 of the subcarrier spacing.

[0070] exist Figure 2In the example of FIG, μ = 0 204 and μ = 1 205 are shown as the configuration values ​​of the subcarrier spacing. When μ = 0 204, one subframe 201 may include one time slot 202, and when μ = 1 205, one subframe 201 may include two time slots 203. That is, the number of time slots per subframe is The number of slots per frame can vary depending on the configured value μ of the subcarrier spacing and, accordingly, the number of slots per frame Can vary. According to the configuration of each subcarrier spacing μ and It can be defined as in Table 1.

[0071] [Table 1]

[0072]

[0073] In a 5G wireless communication system, for initial access, a synchronization signal block (synchronization signal block, SSB, SS block and SS / PBCH block can be used interchangeably) can be sent, and the synchronization signal block can include a primary synchronization signal (PSS), a secondary synchronization signal (SSS) and a physical broadcast channel (PBCH). In the initial access step when the terminal accesses the system for the first time, the terminal can first obtain downlink time domain and frequency domain synchronization from the synchronization signal through cell search, and can obtain a cell ID. The synchronization signal can include PSS and SSS. The terminal can then receive a PBCH for sending a master information block (MIB) from the base station, and can obtain system information related to transmission and reception, such as system bandwidth or related control information and basic parameter values. The terminal can obtain a system information block (SIB) by decoding the physical downlink control channel (PDCCH) and the physical downlink shared channel (PDSCH) based on this information. Next, the terminal exchanges identities with the base station through a random access step, and initially accesses the network through steps such as registration and authentication.

[0074] The cell initial access operation process of the 5G wireless communication system will be described in more detail with reference to the accompanying drawings.

[0075] According to the embodiment, the synchronization signal is a reference signal for cell search, and a subcarrier spacing suitable for the channel environment such as phase noise can be applied to each frequency band. The 5G base station can send multiple synchronization signal blocks according to the number of analog beams to be operated. The PSS and SSS can be mapped to 12 resource blocks (RBs) and transmitted therein, and the PBCH can be mapped to 24 RBs and transmitted therein. The structure for transmitting the synchronization signal and PBCH in the 5G communication system will now be described.

[0076] Figure 3 is a diagram showing a synchronization signal block considered in a 5G communication system according to an embodiment of the present disclosure.

[0077] refer to Figure 3 , the synchronization signal block 300 includes PSS 301, SSS 303, and PBCH 302.

[0078] like Figure 3 As shown, the synchronization signal block 300 can be mapped to four OFDM symbols on the time axis. PSS 301 and SSS 303 can be transmitted in the first and third OFDM symbols on the time axis and 12 RBs 305 on the frequency axis. In the 5G system, a total of 1008 different cell IDs can be defined. Depending on the physical layer ID of the cell, PSS 301 can have three different values ​​and SSS 303 can have 336 different values. The terminal can obtain one of the 1008 cell IDs through the combination of the detected PSS 301 and SSS 303. This can be expressed by <Equation 1>.

[0079] [Equation 1]

[0080]

[0081] In Equation 1, It may be estimated from SSS 303 and may have a value between 0 and 335. It can be estimated from PSS 301 and can have a value between 0 and 2. and The combination of value.

[0082] The PBCH 302 may be transmitted in the second to fourth OFDM symbols of the SS block on the time axis and in 24 RBs 306 on the frequency axis, in resources including the six RBs 307 and 308 on both sides (excluding the 12 RBs at the center for transmitting the SSS 303). Various system information referred to as MIB may be transmitted in the PBCH 302. More specifically, the MIB includes information as shown in , and the PBCH payload and the PBCH demodulation reference signal (DMRS) include the following additional information.

[0083] [Table 2]

[0084]

[0085] - Synchronization signal block information: The frequency domain offset of the synchronization signal block is indicated by 4 bits (ssb-SubcarrierOffset) in the MIB. The index of the synchronization signal block including the PBCH can be indirectly obtained by decoding the PBCH and the PBCH DMRS. More specifically, in frequency bands of 6 GHz or lower, 3 bits obtained by decoding the PBCH DMRS indicate the index of the synchronization signal block, and in frequency bands of 6 GHz or higher, 3 bits obtained by decoding the PBCH DMRS and 3 bits included in the PBCH payload and obtained by decoding the PBCH, that is, a total of 6 bits, indicate the index of the synchronization signal block including the PBCH.

[0086] -PDCCH information: The subcarrier spacing of the common downlink control channel is indicated by 1 bit (subCarrierSpacingCommon) in the MIB, and the time-frequency resource configuration information of the control resource set (CORESET) and search space (SS) is indicated by 8 bits (pdcch-ConfigSIB1).

[0087] - System Frame Number (SFN): 6 bits (systemFrameNumber) in the MIB are used to indicate a portion of the SFN. The 4 least significant bits (LSBs) of the SFN may be included in the PBCH payload and may be indirectly obtained by the terminal by decoding the PBCH.

[0088] - Timing information in radio frame: 1 bit (half frame), which is included in the index of the synchronization signal block and PBCH payload and is obtained by decoding the PBCH. The terminal can indirectly identify whether the synchronization signal block is sent in the first half frame or the second half frame of the radio frame.

[0089] Because the transmission bandwidth of PSS 301 and SSS 303 (12 RBs 305) and the transmission bandwidth of PBCH 302 (24 RBs 306) are different from each other, in addition to the 12 RBs for transmitting PSS 301 at the center, the 6 RBs 307 and 308 on both sides exist in the first OFDM symbol in which PSS 301 is transmitted within the transmission bandwidth of PBCH 302, and can be used to transmit other signals or can be empty.

[0090] All synchronization signal blocks can be transmitted using the same analog beam. That is, the PSS 301, SSS 303, and PBCH 302 can be transmitted using the same beam. Because analog beams cannot be applied differently to the frequency axis, within a specific OFDM symbol to which a specific analog beam is applied, the same analog beam is applied to all RBs on the frequency axis. That is, all four OFDM symbols in which the PSS 301, SSS 303, and PBCH 302 are transmitted can be transmitted using the same analog beam.

[0091] Figure 4 is a diagram illustrating a transmission situation of a synchronization signal block in a frequency band of 6 GHz or lower considered in a 5G communication system according to an embodiment of the present disclosure.

[0092] Reference Figure 4 In a 5G communication system, in a frequency band of 6 GHz or lower, a subcarrier spacing (SCS) 420 of 15 kHz and subcarrier spacings 430 and 440 of 30 kHz may be used to transmit a synchronization signal block. One transmission case for the synchronization signal block, case #1 401, may exist in the subcarrier spacing of 15 kHz, and two transmission cases for the synchronization signal block, case #2 402 and case #3 403, may exist in the subcarrier spacing of 30 kHz.

[0093] In case #1 401 of a 15 kHz subcarrier spacing 420, up to two synchronization signal blocks may be transmitted in 1 ms 404 (or the length of one slot when one slot includes 14 OFDM symbols). Figure 4 In the example of FIG, there are shown synchronization signal block #0 407 and synchronization signal block #1 408. In this case, synchronization signal block #0 407 may be mapped to four consecutive symbols starting from the third OFDM symbol, and synchronization signal block #1 408 may be mapped to four consecutive symbols starting from the ninth OFDM symbol.

[0094] Different analog beams can be applied to synchronization signal block #0 407 and synchronization signal block #1 408. Therefore, the same beam can be applied to the third to sixth OFDM symbols to which synchronization signal block #0 407 is mapped, and the same beam can be applied to the ninth to twelfth OFDM symbols to which synchronization signal block #1 408 is mapped. The beams used for the seventh, eighth, thirteenth, and fourteenth OFDM symbols to which no synchronization signal block is mapped can be freely determined by the base station.

[0095] In case #2 402 of a 30 kHz subcarrier spacing 430, up to two synchronization signal blocks may be sent in 0.5 ms 405 (or the length of one slot when one slot includes 14 OFDM symbols), and thus up to four synchronization signal blocks may be sent in 1 ms (or the length of two slots when one slot includes 14 OFDM symbols). Figure 4 In the example of , synchronization signal block #0 409, synchronization signal block #1 410, synchronization signal block #2 411, and synchronization signal block #3 412 are transmitted within 1 ms (i.e., two time slots). In this case, synchronization signal block #0 409 and synchronization signal block #1 410 can be mapped to consecutive symbols starting from the fifth OFDM symbol and the ninth OFDM symbol of the first time slot, respectively, while synchronization signal block #2 411 and synchronization signal block #3 412 can be mapped to consecutive symbols starting from the third OFDM symbol and the seventh OFDM symbol of the second time slot, respectively.

[0096] Different analog beams can be applied to synchronization signal block #0 409, synchronization signal block #1 410, synchronization signal block #2 411, and synchronization signal block #3 412. Therefore, the same analog beam can be applied to the fifth to eighth OFDM symbols of the first time slot in which synchronization signal block #0 409 is transmitted, the ninth to twelfth OFDM symbols of the first time slot in which synchronization signal block #1 410 is transmitted, the third to sixth symbols of the second time slot in which synchronization signal block #2 411 is transmitted, and the seventh to tenth symbols of the second time slot in which synchronization signal block #3 412 is transmitted. The beam used for OFDM symbols to which no synchronization signal block is mapped can be freely determined by the base station.

[0097] In case #3 403 in a subcarrier spacing of 30 kHz 440, up to two synchronization signal blocks may be sent in 0.5 ms 406 (or the length of one slot when one slot includes 14 OFDM symbols), and thus up to four synchronization signal blocks may be sent in 1 ms (or the length of two slots when one slot includes 14 OFDM symbols). Figure 4 In the example of , synchronization signal block #0 413, synchronization signal block #1 414, synchronization signal block #2 415, and synchronization signal block #3 416 are transmitted within 1 ms (i.e., two time slots). In this case, synchronization signal block #0 413 and synchronization signal block #1 414 can be mapped to consecutive symbols starting from the third OFDM symbol and the ninth OFDM symbol of the first time slot, respectively, while synchronization signal block #2 415 and synchronization signal block #3 416 can be mapped to consecutive symbols starting from the third OFDM symbol and the ninth OFDM symbol of the second time slot, respectively.

[0098] Different analog beams can be used for synchronization signal block #0 413, synchronization signal block #1 414, synchronization signal block #2 415, and synchronization signal block #3 416. As described above, the same analog beam can be used to transmit all four OFDM symbols of each synchronization signal block, and the beam used for OFDM symbols to which no synchronization signal block is mapped can be freely determined by the base station.

[0099] Figure 5 is a diagram illustrating a transmission situation of a synchronization signal block in a frequency band of 6 GHz or higher considered in a 5G communication system according to an embodiment of the present disclosure.

[0100] refer to Figure 5 In a 5G communication system, in a frequency band of 6 GHz or higher, a subcarrier spacing 530 of 120 kHz and a subcarrier spacing 540 of 240 kHz may be used to transmit synchronization signal blocks.

[0101] In case #4 550 of a 120 kHz subcarrier spacing 530, up to four synchronization signal blocks can be sent in 0.25 ms 501 (or the length of two slots when one slot includes 14 OFDM symbols). Figure 5 In the example of , synchronization signal block #0 503, synchronization signal block #1 504, synchronization signal block #2 505, and synchronization signal block #3 506 are transmitted within 0.25 ms (i.e., two time slots). In this case, synchronization signal block #0 503 and synchronization signal block #1 504 can be mapped to consecutive symbols starting from the fifth OFDM symbol and the ninth OFDM symbol of the first time slot, respectively, while synchronization signal block #2 505 and synchronization signal block #3 506 can be mapped to consecutive symbols starting from the third OFDM symbol and the seventh OFDM symbol of the second time slot, respectively.

[0102] As described above, different analog beams can be used for synchronization signal block #0 503, synchronization signal block #1 504, synchronization signal block #2 505, and synchronization signal block #3 506. The same analog beam can be used to transmit all four OFDM symbols of each synchronization signal block, and the beam used for OFDM symbols to which no synchronization signal block is mapped can be freely determined by the base station.

[0103] In case #5 560 of a 240 kHz subcarrier spacing 540, up to eight synchronization signal blocks can be sent in 0.25 ms 502 (or the length of four slots when one slot includes 14 OFDM symbols). Figure 5In the example of , synchronization signal block #0 507, synchronization signal block #1 508, synchronization signal block #2 509, synchronization signal block #3 510, synchronization signal block #4 511, synchronization signal block #5 512, synchronization signal block #6 513 and synchronization signal block #7 514 are sent within 0.25ms (i.e., four time slots). In this case, synchronization signal block #0 507 and synchronization signal block #1 508 can be mapped to consecutive symbols starting from the ninth OFDM symbol and the thirteenth OFDM symbol of the first time slot, respectively, synchronization signal block #2 509 and synchronization signal block #3 510 can be mapped to consecutive symbols starting from the third OFDM symbol and the seventh OFDM symbol of the second time slot, respectively, synchronization signal block #4 511, synchronization signal block #5 512 and synchronization signal block #6 513 can be mapped to consecutive symbols starting from the fifth OFDM symbol, the ninth OFDM symbol and the thirteenth OFDM symbol of the third time slot, respectively, and synchronization signal block #7 514 can be mapped to consecutive symbols starting from the third OFDM symbol of the fourth time slot.

[0104] As described above, different analog beams can be used for synchronization signal block #0 507, synchronization signal block #1 508, synchronization signal block #2 509, synchronization signal block #3 510, synchronization signal block #4 511, synchronization signal block #5 512, synchronization signal block #6 513, and synchronization signal block #7 514. The same analog beam can be used to transmit all four OFDM symbols of each synchronization signal block, and the beam used for OFDM symbols to which no synchronization signal block is mapped can be freely determined by the base station.

[0105] Figure 6 6 is a diagram illustrating the transmission of synchronization signal blocks according to subcarrier spacing within 5 ms according to an embodiment of the present disclosure. In a 5G communication system, synchronization signal blocks may be periodically transmitted in units of 5 ms (corresponding to 5 subframes or half frames).

[0106] In frequency bands of 3 GHz or lower, up to four synchronization signal blocks may be transmitted within a time period of 5 ms 610. In frequency bands of 3 GHz or higher and 6 GHz or lower, up to eight synchronization signal blocks may be transmitted. In frequency bands of 6 GHz or higher, up to 64 synchronization signal blocks may be transmitted. As described above, subcarrier spacings of 15 kHz and 30 kHz may be used for frequencies of 6 GHz or lower.

[0107] exist Figure 6 In the example that includes Figure 4In the case of a 15 kHz subcarrier spacing of one time slot, case #1 401 can be mapped to the first time slot and the second time slot in a frequency band of 3 GHz or lower, and thus, up to 4 synchronization signal blocks 621 can be transmitted, and this case can be mapped to the first, second, third, and fourth time slots in a frequency band of 3 GHz or higher and 6 GHz or lower, and thus, up to 8 synchronization signal blocks 622 can be transmitted. Figure 4 In the 30kHz subcarrier spacing of two time slots, case #2 402 or case #3 403 can be mapped to consecutive time slots starting from the first time slot in a frequency band of 3 GHz or lower, and thus, four synchronization signal blocks 631 and 641 can be transmitted, and this case can be mapped to consecutive time slots starting from the first time slot and the third time slot in a frequency band of 3 GHz or higher and 6 GHz or lower, and thus, up to eight synchronization signal blocks 632 and 642 can be transmitted.

[0108] Subcarrier spacings of 120kHz and 240kHz can be used for frequencies of 6GHz or higher. Figure 6 In the example that includes Figure 5 In the 120 kHz subcarrier spacing of two time slots of case #4 550, it can be mapped to consecutive time slots starting from the 1st, 3rd, 5th, 7th, 11th, 13th, 15th, 17th, 21st, 23rd, 25th, 27th, 31st, 33rd, 35th and 37th time slots in the 6 GHz or higher frequency band, and thus, up to 64 synchronization signal blocks 651 can be transmitted. Figure 6 In the example that includes Figure 5 In the four time slots with a subcarrier spacing of 240kHz, case #5 560 can be mapped to consecutive time slots starting from the 1st, 5th, 9th, 13th, 21st, 25th, 29th, and 33rd time slots, so up to 64 synchronization signal blocks 661 can be sent.

[0109] Now refer to Figure 7 The actually transmitted synchronization signal block indication information included in the system is described in detail. As described above, the actually transmitted synchronization signal block indication information can be obtained from the system information called SIB or can be obtained through high-layer signaling. The actually transmitted synchronization signal block indication information included in the system information can be indicated by 8 bits to indicate whether up to 8 synchronization signal blocks are transmitted in a frequency band of 6 GHz or lower, and can be indicated by a total of 16 bits to indicate whether up to 64 synchronization signal blocks 710 are transmitted in a frequency band of 6 GHz or higher. In more detail, in a frequency band of 6 GHz or lower, one bit can indicate whether one synchronization signal block is transmitted. When the first MSB is 1, it can indicate that the first synchronization signal block is actually transmitted from the base station, and when the first MSB is 0, it can indicate that the first synchronization signal block is not transmitted from the base station.

[0110] Figure 7 : is a diagram showing synchronization signal block information actually transmitted through system information in a 5G communication system according to an embodiment of the present disclosure. That is, Figure 7 is a diagram illustrating a specific example of a case where a synchronization transport block is transmitted on a 120 kHz subcarrier in a frequency band of 6 GHz or higher.

[0111] Reference Figure 7 In a frequency band of 6 GHz or higher, in order to indicate whether up to 64 synchronization signal blocks are transmitted, eight synchronization signal blocks can be combined into one group, and a total of eight groups, namely the first to eighth groups 701, 702, 703, 704, 705, 706, 707 and 708, can be obtained. Therefore, eight bits 720 indicating whether the eight synchronization signal blocks in a group are transmitted and eight bits 730 indicating the existence of eight groups can be represented, that is, a total of 16 bits. The eight bits 720 indicating whether the synchronization signal blocks in a group are transmitted can indicate a pattern (e.g., eight bits 720) in the same manner as in a frequency band of 6 GHz or lower. In detail, when the first MSB is 1, the base station can be instructed to transmit the first synchronization signal block (721). In addition, when the second MSB is 0, it can be indicated that the base station did not actually transmit the second synchronization signal block (722). Of the eight bits 730 indicating the presence of eight groups, if the first MSB is 0, this may indicate that not all eight synchronization signal blocks in the first group Group #1 731 (e.g., Group #1 731) have been transmitted. If the second MSB is 1, this may indicate that the eight synchronization signal blocks in the second group Group #2 732 are transmitted in a transmission pattern (e.g., eight bits 720) of eight consecutive synchronization signal blocks in one configured group (e.g., Group #2 732). In the synchronization signal block indication information actually transmitted, which is transmitted via higher-layer signaling rather than system information, one bit indicates whether one synchronization signal block has been transmitted, in order to indicate whether up to 64 synchronization block signals are transmitted regardless of the frequency band. For example, the synchronization signal block indication information may indicate whether a synchronization signal block is transmitted using a total of 64 bits.

[0112] The terminal can perform decoding of PDCCH and PDSCH based on the system information included in the received MIB, and then can obtain SIB. SIB may include at least one of uplink cell bandwidth, random access parameters, paging parameters or uplink power control related parameters. The terminal can establish a radio link with the network through a random access process based on the system information obtained in the cell search process of the cell and synchronization with the network. A contention-based method or a non-contention method can be used as random access. In the case where the terminal performs cell selection and reselection in the initial access step of the cell, contention-based access can be used for purposes such as moving from the RRC_IDLE state to the RRC_CONNECTED state. The non-contention random access method can be when downlink data arrives, when a handover occurs, or when uplink synchronization is reconfigured in the case of position measurement.

[0113] Now refer to Figure 8 The 4-step random access procedure (RACH procedure) is described in detail.

[0114] Figure 8 FIG is a diagram illustrating a 4-step random access procedure according to an embodiment of the present disclosure. Figure 8 In the first step 801 of the random access procedure, the UE transmits a random access preamble or message 1 to the gNB. The gNB measures the transmission delay between the UE and gNB and performs uplink synchronization. In this case, the UE transmits a random access preamble randomly selected from a set of random access preambles pre-determined by system information. The initial transmission power of the random access preamble is determined based on the path loss between the gNB and the UE measured by the UE. Furthermore, the UE determines a transmission beam direction (or transmission beam or beams) based on a synchronization signal (or SSB) from the gNB and transmits the random access preamble using the determined transmission beam direction.

[0115] In a second step 802, the gNB sends a response (Random Access Response (RAR) or Message 2) to the UE in response to the detected random access attempt. The gNB sends an uplink transmission timing control command to the UE based on the transmission delay value measured from the random access preamble received in the first step. Furthermore, the gNB sends a power control command and the uplink resources to be used by the UE as scheduling information. Depending on the embodiment, control information regarding the UE's uplink transmission beam may be included in the scheduling information. The RAR may be sent via the PDSCH and may include the following information.

[0116] - Random access preamble sequence index detected by the network (or gNB)

[0117] -Temporary Cell Radio Network Temporary Identifier (TC-RNTI)

[0118] -Uplink Scheduling Grant

[0119] -Timing advance value

[0120] If the UE does not receive the RAR as the scheduling information of message 3 in the second step 802 from the gNB within a specific time, the first step 801 is performed again. When the first step is performed again, the UE increases the transmission power of the random access preamble by a specific step size and sends the increased transmission power (called power ramp) to increase the probability that the gNB will receive the random access preamble.

[0121] In the third step 803, the UE transmits uplink data (scheduled transmission or Message 3) including the UE's UE identifier to the gNB using the uplink resources received in the second step 802 via the uplink data channel (Physical Uplink Shared Channel (PUSCH)). The transmission timing of the uplink data channel used to transmit Message 3 follows the uplink transmission timing control command received from the gNB in ​​the second step 802. Furthermore, the transmission power of the uplink data channel used to transmit Message 3 is determined by taking into account the power ramp value and power control command of the random access preamble received from the gNB in ​​the second step 802. The uplink data channel used to transmit Message 3 may be the first uplink data signal transmitted by the UE to the gNB after the UE transmits the random access preamble.

[0122] Finally, in the fourth step 804, if the UE is determined to have performed random access without colliding with another UE, the gNB transmits data (a contention resolution message or Message 4) including an identifier of the UE that transmitted uplink data in the third step 803 to the UE. When the UE receives the signal transmitted by the gNB in ​​the fourth step 804, it determines that the random access was successful. The UE transmits a HARQ-ACK / NACK indicating whether Message 4 was successfully received to the gNB via the Physical Uplink Control Channel (PUCCH).

[0123] If the data transmitted by the UE and the data of another UE collide with each other in the third step 803 and the gNB fails to receive the data signal from the UE, the gNB does not perform further data transmission to the UE. Therefore, if the UE fails to receive the data transmitted from the gNB for a certain time in the fourth step 804, it is determined that the random access procedure has failed and the first step 801 is started again.

[0124] As described above, in the first step 801 of the random access procedure, the UE may transmit a random access preamble on the PRACH. Each cell may have 64 available preamble sequences, and four long preamble formats and nine short preamble formats may be used depending on the transmission type. The UE generates 64 preamble sequences using the root sequence index and cyclic shift value signaled by system information, randomly selects one of the sequences, and uses it as the preamble.

[0125] The network can inform the UE which time-frequency resources can be used for PRACH by using SIB or higher-layer signaling. The frequency resource indicates the starting RB point of the transmission to the UE, and the number of RBs used is determined by the preamble format and the applied subcarrier spacing. As shown in , the time resource can indicate the preset PRACH configuration period, the subframe index including the PRACH opportunity (PRACH opportunity and transmission opportunity can be used interchangeably) and the starting symbol, and the number of PRACH opportunities in the time slot through the PRACH configuration index (0 to 255). Through the PRACH configuration index, the random access configuration information included in the SIB, and the index of the SSB selected by the UE, the UE can identify the time and frequency resources for sending the random access preamble, and can send the selected sequence as a preamble to the gNB.

[0126] [Table 3]

[0127]

[0128] Figure 9 is a diagram illustrating an uplink-downlink configuration considered in a 5G communication system according to an embodiment of the present disclosure.

[0129] refer to Figure 9 , the time slot 901 may include 14 symbols 902. In a 5G communication system, the uplink-downlink configuration of the symbol / time slot may be configured in three steps. First, the uplink-downlink of the symbol / time slot may be configured through the cell-specific semi-static uplink-downlink configuration information 910 through the system information in the symbol unit. In detail, the uplink-downlink pattern information and the reference subcarrier information may be included in the cell-specific uplink-downlink configuration information through the system information. In the uplink-downlink pattern information, the pattern periodicity 903, the number of consecutive downlink time slots 911 starting from the starting point of each pattern, the number of symbols 912 of the next time slot, the number of consecutive uplink time slots 913 starting from the end of the pattern, and the number of symbols 914 of the next time slot may be indicated. In this case, the time slots / symbols that are not indicated as uplink and downlink may be determined as flexible time slots / symbols.

[0130] Secondly, through user-specific configuration information of dedicated high-layer signaling, time slots 921 and 922 including flexible time slots or flexible symbols can be indicated by the number of consecutive downlink symbols 923 and 925 starting from the start symbol of each time slot and by the number of consecutive uplink symbols 924 and 926 starting from the end of each time slot, respectively, or can be indicated by the entire time slot downlink or the entire time slot uplink.

[0131] Finally, in order to dynamically change the downlink signal transmission interval and the uplink signal transmission interval, regarding the symbols indicated as flexible symbols in each time slot (i.e., symbols not indicated as downlink and uplink), it is possible to indicate whether each symbol is a downlink symbol, an uplink symbol, or a flexible symbol through time slot format indicators (SFI) 931 and 932 included in the downlink control channel. The time slot format indicator can select an index in a table in which the uplink-downlink configuration of 14 symbols in one time slot is pre-configured as shown in .

[0132] [Table 4]

[0133]

[0134] 5G mobile communication services introduce additional coverage extension technologies compared to LTE communication services. However, the actual coverage of 5G mobile communication services can generally utilize a TDD system suitable for services with a high proportion of downlink traffic. Furthermore, as the center frequency increases to expand the frequency band, the coverage range of base stations and terminals decreases. Therefore, coverage enhancement is a core requirement of 5G mobile communication services. In particular, because the transmission power of terminals is generally lower than that of base stations, it is necessary to support services with a high proportion of downlink traffic. Furthermore, the proportion of downlink traffic in the time domain is higher than that of uplink traffic in the time domain, so enhancing coverage of uplink channels is a core requirement of 5G mobile communication services. Examples of methods for physically enhancing the coverage of the uplink channel between base stations and terminals include increasing the time resources of the uplink channel, lowering the center frequency, and increasing the transmission power of the terminal. However, changing the frequency may be limited because the frequency band is determined for each network operator. Furthermore, increasing the maximum transmission power of a terminal may be limited because the maximum value is determined to reduce interference, that is, the maximum transmission power of a terminal is adjustable.

[0135] Therefore, for coverage enhancement of base stations and terminals, uplink resources and downlink resources can even be divided in the frequency domain as in an FDD system, rather than dividing uplink resources and downlink resources in the time domain according to the service ratio of uplink and downlink in a TDD system. In one embodiment, a system for flexibly dividing uplink resources and downlink resources in the time domain and frequency domain may be referred to as an XDD system, a flexible TDD system, a hybrid TDD system, a TDD-FDD system, or a hybrid TDD-FDD system, and for ease of explanation, is described in this disclosure as an XDD system. Depending on the embodiment, the X in XDD may represent time or frequency.

[0136] Figure 10 is a diagram illustrating an uplink-downlink configuration of an XDD system in which uplink resources and downlink resources are flexibly divided in the time domain and the frequency domain according to an embodiment of the present disclosure.

[0137] refer to Figure 10 From the perspective of a base station, in an uplink-downlink configuration 1000 of an XDD system, resources can be flexibly allocated to each symbol or time slot 1002 across the entire frequency band 1001, depending on the ratio of uplink to downlink traffic. In this case, a guard band 1005 can be allocated between the frequency bands of downlink resources 1003 and uplink resources 1004. This guard band can be allocated to reduce an interface in uplink channel or signal reception caused by out-of-band (OOB) emissions when the base station transmits a downlink channel or signal in downlink resources 1003. In this case, for example, through the configuration of the base station, UE 1 1010 and UE 2 1020, which have more downlink traffic than uplink traffic, can be allocated a downlink to uplink resource ratio of 4:1 in the time domain. Furthermore, UE 3 1030, operating at the cell edge and lacking uplink coverage, can be allocated only uplink resources in specific time intervals through the configuration of the base station. Furthermore, UE4 1040 operating at the cell edge and lacking uplink coverage but having relatively large downlink and uplink traffic can be allocated many uplink resources in the time domain, and many downlink resources in the frequency band for uplink coverage. As in the above example, more downlink resources in the time domain can be allocated to UEs operating at the cell center and having large downlink traffic, and more uplink resources in the time domain can be allocated to UEs operating at the cell edge and lacking uplink coverage.

[0138] The present disclosure provides a method and apparatus for sending and receiving channels and signals between a base station and a terminal in an XDD system, in which uplink resources and downlink resources are flexibly allocated in the time domain and the frequency domain according to the service ratio of the uplink and downlink in a 5G mobile communication system.

[0139] Although the present disclosure provides a method and apparatus for transmitting and receiving channels and signals between a base station and a terminal for coverage enhancement, the present disclosure may also be applied to a method and apparatus for transmitting and receiving channels and signals for a service (e.g., URLLC) that may be provided by a 5G system for purposes other than coverage enhancement. In addition, although the present disclosure provides a method and apparatus for transmitting and receiving channels and signals between a base station and a terminal in an XDD system, the present disclosure is not limited to the XDD system and may also be applied to a method and apparatus for transmitting and receiving channels and signals in another frequency division duplex system that may be provided by a 5G system.

[0140] <First embodiment>

[0141] The first embodiment of the present disclosure relates to a method by which a terminal transmits a channel or signal when a time domain location for transmitting a synchronization signal block is configured in an XDD system. The uplink channel or signal transmission method of this embodiment, when a base station transmits an indicator (the indicator transmission method and operations using the indicator are described in the fourth embodiment), can increase the time domain resources in which the terminal can transmit an uplink, thereby enhancing the uplink coverage between the terminal and the base station.

[0142] In detail, as described above, the time domain position of sending the synchronization signal block can be configured by cell-specific configuration information and high-layer signaling through system information. In this case, in the time domain where the synchronization signal block is sent, because the synchronization signal block used for initial access, synchronization, and beam reception and having a high priority should be sent by the base station as a downlink, the TDD system that basically allocates uplink resources and downlink resources through the time domain may not send the terminal's uplink channel and signal in the same (multiple) symbols. In this case, as described above, when there are more downlink resources than uplink resources in the time domain, an uplink coverage problem may occur between the base station and the terminal.

[0143] To solve this problem, as described above, because the XDD system allows uplink resources and downlink resources to be divided and allocated not only in the time domain but also in the frequency domain, the base station can send a synchronization signal block, and the terminal that should perform initial access, synchronization and beam reception can receive the synchronization signal block. In addition, the terminal can send uplink channels and signals in the frequency band allocated as uplink resources in the same (multiple) symbols in which the synchronization signal block is sent. However, in the XDD system, when compared to the FDD system, because the uplink resources and downlink resources are relatively close in the frequency band, interference caused by OOB transmission may occur. In this embodiment, the channel or signal sent by the terminal as an uplink may interfere with another terminal that receives the synchronization signal block nearby.

[0144] Therefore, the present disclosure provides a method by which a terminal determines whether to send uplink channels and signals in the same (multiple) symbols / (multiple) time slots in which the synchronization signal block is sent, when the time domain position for sending the synchronization signal block is configured in the XDD system.

[0145] The following method may be considered as a method for a terminal to determine whether to transmit an uplink channel and signal in an XDD system.

[0146] [Method 1]

[0147] When the terminal is configured with an XDD indicator (defined in the fourth embodiment), the terminal can send uplink data channels, control channels, random access channels and sounding reference signals (SRS) (through high-layer signaling) at the time domain position of the synchronization signal block, as well as uplink data, control, random access channels or SRS scheduled by downlink control information formats 0_0, 0_1, 1_0, 1_1 or 2_3. In this case, if the base station is able to fully control the interference caused by OOB transmission, the terminal configured with the XDD indicator can even send uplink data, control, random access channels or SRS in the time domain symbols of the synchronization signal block sent by the base station, thereby enhancing uplink coverage.

[0148] Figure 11 is a diagram illustrating an example of a frame structure of a configuration of a terminal in an XDD system according to an embodiment of the present disclosure.

[0149] refer to Figure 11The terminal can know the time-domain symbol position of the synchronization signal block 1105 based on cell-specific configuration information through received SIB information or higher-layer signaling. The terminal can be configured with uplink data, control, random access channel, or SRS 1108 through higher-layer signaling. Uplink data, control, random access channel, or SRS 1109 can be scheduled in the terminal through downlink control information formats 0_0, 0_1, 1_0, 1_1, or 2_3.

[0150] Figure 12 is a diagram illustrating a method in which a terminal determines whether to transmit an uplink channel and signal according to an embodiment of the present disclosure.

[0151] Reference Figure 12 The terminal can know the time domain symbol position 1105 of the synchronization signal block actually sent by the base station based on the cell-specific configuration information through the received SIB information or higher-layer signaling (operation 1201). The terminal can determine whether the transmission symbols of uplink data, control, random access channel, or SRS 1108 / 1109 configured or scheduled through higher-layer signaling or downlink control information (DCI) format 0_0, 0_1, 1_0, 1_1, or 2_3 overlap based on the time domain (operation 1202).

[0152] In an embodiment, when the transmission symbols of the configured or scheduled uplink data, control, random access channel, or SRS 1108 / 1109 do not overlap based on the time domain, the terminal may transmit the uplink channel or signal 1108 / 1109 in the configured or scheduled symbols (operation 1203). In an embodiment, when the transmission symbols overlap based on the time domain, the terminal may determine whether an XDD system indicator (or the priority rule change indicator described in the fourth embodiment) is configured or received (operation 1204).

[0153] In one embodiment, when the terminal is not configured with an XDD system indicator or does not receive the indicator, the terminal may not send uplink data, control, random access channel or SRS scheduled by higher layer signaling or DCI format 0_0, 0_1, 1_0, 1_1 or 2_3 in the time domain symbol of the synchronization signal block (operation 1205).

[0154] In one embodiment, when the terminal is configured with or receives an XDD system indicator, the terminal may transmit uplink channels and signals 1108 / 1109 configured or scheduled by higher layer signaling or DCI 1106 (operation 1206). Figure 12 All operations described in the description should be performed according to the order described, and the order of performing each operation may be changed or omitted.

[0155] [Method 2]

[0156] When the terminal is configured with an XDD indicator (defined in the fourth embodiment), the terminal may not send uplink data channels, control channels, random access channels and SRS through high-layer signaling at the time domain position of the synchronization signal block, but may send uplink data, control, random access channels or SRS scheduled by DCI formats 0_0, 0_1, 1_0, 1_1 or 2_3. As described above, from the perspective of the base station, when the synchronization signal block transmission and uplink channel / signal reception are performed in the same symbol, there may be an interference effect on the base station due to the OOB transmission sent by the synchronization signal block. In addition, from the perspective of the terminal, the terminal that sends the uplink channel / signal may have an interference effect on the terminal that receives the synchronization signal block nearby due to OOB transmission. Therefore, the transmission of the uplink channel / signal in the time domain symbol of the synchronization signal block should be controlled in real time to avoid the interference effect as much as possible. In this case, because the uplink data channel, control channel, random access channel and SRS configured through high-layer signaling are pre-configured information, unlike scheduling through DCI (L1 signaling), it may be difficult to control the uplink data channel, control channel, random access channel and SRS in real time.

[0157] Therefore, a terminal configured with an XDD indicator can send uplink data, control, random access channel or SRS scheduled by DCI, which can control the interference effect caused by OOB transmission in real time even in the time domain symbols of the base station sending the synchronization signal block, thereby enhancing uplink coverage.

[0158] Figure 13 is a diagram illustrating another method for a terminal to determine whether to transmit an uplink channel and signal according to an embodiment of the present disclosure.

[0159] Reference Figure 13 The terminal can obtain the time domain symbol position 1105 of the synchronization signal block actually transmitted by the base station based on the cell-specific configuration information through received SIB information or higher-layer signaling (operation 1301). The terminal can determine whether the transmission symbols of uplink data, control, random access channel, or SRS 1108 / 1109 configured or scheduled through higher-layer signaling or DCI format 0_0, 0_1, 1_0, 1_1, or 2_3 overlap based on the time domain (operation 1302).

[0160] In one embodiment, when the transmission symbols of the configured or scheduled uplink data, control, random access channel, or SRS 1108 / 1109 do not overlap based on the time domain, the terminal may transmit the uplink channel or signal 1108 / 1109 in the configured or scheduled symbols (operation 1303). In one embodiment, when the transmission symbols overlap based on the time domain, the terminal may determine whether an XDD system indicator (or the priority rule change indicator described in the fourth embodiment) is configured or received (operation 1304).

[0161] In one embodiment, when the terminal is not configured with an XDD system indicator or does not receive the indicator, the terminal may not send uplink data, control, random access channel or SRS scheduled by higher layer signaling or DCI format 0_0, 0_1, 1_0, 1_1 or 2_3 in the time domain symbol of the synchronization signal block (operation 1305).

[0162] In one embodiment, when the terminal is configured with or receives an XDD system indicator, the terminal may determine whether the uplink channel signal is an uplink channel and signal 1109 scheduled by DCI format 0_0, 0_1, 1_0, 1_1, or 2_3 (operation 1306). When it is not an uplink channel and signal scheduled by DCI 1106, the terminal may not send the uplink channel and signal 1108 (operation 1307). When the uplink channel and signal are scheduled by DCI 1106, the terminal may send the uplink channel and signal 1109 (operation 1308). Figure 13 All operations described in should be performed in the order described, and the order of performing each operation can be changed or omitted.

[0163] [Method 3]

[0164] When the terminal is configured with an XDD indicator (defined in the fourth embodiment), at the time domain position of sending the synchronization signal block, the terminal may not send the uplink control channel, the random access channel and the SRS, but may send the uplink data channel.

[0165] As described above, from the perspective of the base station, when the synchronization signal block transmission and the uplink channel / signal reception are performed in the same symbol, there may be an interference effect on the base station due to the OOB transmission of the synchronization signal block. In addition, from the perspective of the terminal, the terminal transmitting the uplink channel / signal may have an interference effect on the nearby terminal receiving the synchronization signal block due to the OOB transmission. In order to minimize the interference effect, the terminal can transmit an uplink channel / signal with a high priority in the same symbol as the symbol used for the synchronization signal block transmission of the base station. In this case, from the perspective of coverage extension between the base station and the terminal, the channel with the highest priority can be the uplink data channel.

[0166] According to the embodiment, because the uplink data channel has the smallest coverage among the uplink / downlink channels and signals, the total coverage between the base station and the terminal can be determined by the uplink data channel. Therefore, even in the time domain symbols in which the base station transmits the synchronization signal block, the terminal configured with the XDD indicator can transmit the uplink data channel with the highest priority, thereby extending the coverage.

[0167] Figure 14 is a diagram illustrating another method for a terminal to determine whether to transmit an uplink channel and signal according to an embodiment of the present disclosure.

[0168] Reference Figure 14 The terminal can obtain the time domain symbol position 1105 of the synchronization signal block actually transmitted by the base station based on the cell-specific configuration information through received SIB information or higher-layer signaling (operation 1401). The terminal can determine whether the transmission symbols of uplink data, control, random access channel, or SRS 1108 / 1109 configured or scheduled through higher-layer signaling or DCI formats 0_0, 0_1, 1_0, 1_1, or 2_3 overlap based on the time domain (operation 1402).

[0169] In one embodiment, when the transmission symbols of the configured or scheduled uplink data, control, random access channel, or SRS 1108 / 1109 do not overlap based on the time domain, the terminal may transmit the uplink channel or signal 1108 / 1109 in the configured or scheduled symbols (operation 1403). In one embodiment, when the transmission symbols overlap based on the time domain, the terminal may determine whether an XDD system indicator (or the priority rule change indicator described in the fourth embodiment) is configured or received (operation 1404).

[0170] In one embodiment, when the terminal is not configured with or does not receive an XDD system indicator, the terminal may not send uplink data, control, random access channel or SRS scheduled by higher layer signaling or DCI format 0_0, 0_1, 1_0, 1_1 or 2_3 in the time domain symbol of the synchronization signal block (operation 1405).

[0171] In one embodiment, when the terminal is configured with or receives an XDD system indicator, the terminal may determine whether the uplink data channel is an uplink data channel 1109 configured through high-layer signaling or scheduled through DCI (operation 1406). When the uplink data channel is not the uplink data channel 1109, the terminal may not send the uplink channel in the symbol of the synchronization signal block actually sent (operation 1407). When it is determined that the uplink data channel is the uplink data channel 1109, the terminal may send the uplink data channel in the symbol of the synchronization signal block actually sent (operation 1408). Not Figure 14 All operations described in should be performed in the order described, and the order of performing each operation can be changed or omitted.

[0172] In the above method, when the XDD indicator (defined in the fourth embodiment) is configured, the method of determining and sending an uplink channel or signal at the time domain position of sending a synchronization signal block is not limited to the data channel, and can also be applied to other uplink channels or signals, such as a control channel, a random access channel, and an SRS.

[0173] [Method 4]

[0174] When the terminal is configured with an XDD indicator (defined in the fourth embodiment), the terminal can send uplink data channel, control channel, random access channel and SRS when different additional conditions of each channel are met at the time domain position of sending the synchronization signal block.

[0175] As described above, from the perspective of the base station, when the synchronization signal block is transmitted and the uplink channel / signal is received in the same symbol, there may be an interference effect on the base station due to the OOB transmission of the synchronization signal block. In addition, from the perspective of the terminal, the terminal transmitting the uplink channel / signal may have an interference effect on the nearby terminal receiving the synchronization signal block due to the OOB transmission. In order to minimize the interference effect, when the base station performs scheduling and coverage-related configuration on the terminal when the coverage between the base station and the terminal is poor, the terminal can transmit the uplink channel or signal at the time domain location where the synchronization signal block is transmitted. The coverage-related configuration may include at least one of the following configurations.

[0176] - a specific number of repetitions of a data channel or more

[0177] -Pi / 2-BPSK modulation

[0178] -DFT-s-OFDM transmission method

[0179] - a specific aggregation level or more of downlink control channels used to schedule uplink channels or signals

[0180] - New Radio Network Temporary Identifier (RNTI) for DCI used to schedule uplink channels or signals

[0181] -Frequency Hopping

[0182] -Specific uplink control channel format

[0183] -Specific TPC commands

[0184] -Specific MCS index or lower

[0185] -Specific PRACH configuration index

[0186] Based on the coverage-related configuration, the terminal can determine whether to transmit an uplink channel or signal in the time domain position where the synchronization signal block is transmitted. The coverage-related configuration can vary for each uplink channel or signal. Therefore, when the coverage-related configuration is scheduled, a terminal configured with the XDD indicator can even transmit an uplink channel or signal in the time domain symbols of the base station's synchronization signal block, thereby extending coverage.

[0187] Figure 15 is a diagram illustrating another method for a terminal to determine whether to transmit an uplink channel and signal according to an embodiment of the present disclosure.

[0188] Reference Figure 15 The terminal can know the time domain symbol position 1105 of the synchronization signal block actually transmitted by the base station based on the cell-specific configuration information through the received SIB information or higher-layer signaling (operation 1501). The terminal can determine whether the transmission symbols of uplink data, control, random access channel, or SRS 1108 / 1109 configured or scheduled by higher-layer signaling or DCI format 0_0, 0_1, 1_0, 1_1, or 2_3 overlap based on the time domain (operation 1502).

[0189] In one embodiment, when the transmission symbols of the configured or scheduled uplink data, control, random access channel, or SRS 1108 / 1109 do not overlap based on the time domain, the terminal may transmit the uplink channel or signal 1108 / 1109 in the configured or scheduled symbols (operation 1503). In one embodiment, when the transmission symbols overlap based on the time domain, the terminal may determine whether an XDD system indicator (or the priority rule change indicator described in the fourth embodiment) is configured or received (operation 1504).

[0190] In one embodiment, when the terminal is not configured with or does not receive an XDD system indicator, the terminal may not send uplink data, control, random access channel or SRS scheduled by higher layer signaling or DCI format 0_0, 0_1, 1_0, 1_1 or 2_3 in the time domain symbol of the synchronization signal block (operation 1505).

[0191] In one embodiment, when the terminal is configured with or receives an XDD system indicator, the terminal may determine whether an uplink channel or signal is scheduled together with a coverage-related configuration through high-layer signaling or DCI (operation 1506). In an embodiment, when the terminal does not receive a coverage-related configuration, the terminal may not send an uplink channel / signal in a symbol of a synchronization signal block that is actually sent (operation 1507). In one embodiment, when the terminal receives a coverage-related configuration, the terminal may send a scheduled uplink channel / signal in a symbol of a synchronization signal block that is actually sent (operation 1508). Not Figure 15 All operations described in should be performed in the order described, and the order of performing each operation can be changed or omitted.

[0192] <Second embodiment>.

[0193] A second embodiment of the present disclosure relates to a method by which a terminal receives a downlink channel or signal when an effective random access channel transmission time (effective PRACH opportunity) is configured in an XDD system. By using the downlink channel or signal reception method of this embodiment, when a base station sends an indicator to the terminal (the indicator transmission method and the operation using the indicator are described in the fourth embodiment), the time domain resources in which the terminal can receive the downlink can be increased, thereby enhancing the downlink coverage between the terminal and the base station.

[0194] In detail, as described above, the time domain position of the PRACH opportunity can be configured by a PRACH configuration index included in the SIB or higher-layer signaling. In this case, because the terminal for initial access can transmit a random access preamble at the PRACH opportunity, in a TDD system that basically allocates uplink resources and downlink resources in the time domain, the downlink channel and signal of the terminal may not be received in the same (multiple) symbols. In this case, as described above, when there are more downlink resources than uplink resources, a short PRACH opportunity may be allocated in the time domain, and uplink coverage issues for the initial access of the terminal may occur.

[0195] To address this issue, as described above, in an XDD system, uplink and downlink resources can be divided and allocated not only in the time domain but also in the frequency domain. Therefore, even in the time domain, the time during which a terminal can transmit a random access channel can be increased, and at this time, the base station can transmit a downlink channel and signal. However, as described above, in an XDD system, compared to an FDD system, interference due to OOB transmissions may occur because uplink and downlink resources are relatively close in frequency band. In this embodiment, the channel or signal transmitted by the base station as a downlink to the terminal may interfere with the reception of the random access preamble transmitted by the terminal for initial access. Furthermore, the random access preamble transmitted by the terminal for initial access may interfere with the terminal receiving the downlink transmitted by the base station.

[0196] Therefore, the present disclosure provides a method by which a terminal determines whether to receive a downlink channel or signal in the same symbol(s) / time slot(s) when a valid PRACH opportunity is configured in an XDD system.

[0197] The following method may be considered as a method for a terminal to determine whether to receive a downlink channel and signal in an XDD system.

[0198] [Method 1]

[0199] When the terminal is configured with an XDD indicator (defined in the fourth embodiment), the terminal can receive synchronization signal blocks, downlink data channels, control channels and reference signals through high-layer signaling and downlink data channels, control channels and reference signals scheduled through DCI formats 1_0, 1_1 or 0_1 in (multiple) symbols / (multiple) time slots in which valid PRACH opportunities are configured. In this case, when the base station is able to fully control the interference effects caused by OOB transmission, the terminal configured with the XDD indicator can even receive synchronization signal blocks, downlink data channels, control channels or reference signals in valid PRACH opportunity symbols, thereby extending downlink coverage, and valid PRACH opportunities can be configured without downlink restrictions. Therefore, the random access coverage can be extended.

[0200] Figure 16 is a diagram illustrating a method in which a terminal determines whether to receive a downlink channel and signal according to an embodiment of the present disclosure.

[0201] Reference Figure 16The terminal can know the position of (multiple) symbols / (multiple) time slots configured with valid PRACH opportunities based on cell-specific configuration information through received SIB information or higher-layer signaling (operation 1601). The terminal can determine whether received symbols of synchronization signal blocks, downlink data channels, control channels, or reference signals configured or scheduled through higher-layer signaling or DCI formats 1_0, 1_1, or 0_1 overlap based on the time domain (operation 1602).

[0202] In an embodiment, if the received symbols of the configured or scheduled synchronization signal blocks, downlink data channels, control channels, or reference signals do not overlap based on the time domain, the terminal may receive the downlink channel or signal in the configured or scheduled symbols (operation 1603). In an embodiment, if the received symbols overlap based on the time domain, the terminal may determine whether an XDD system indicator (or the priority rule change indicator described in the fourth embodiment) is configured or received (operation 1604).

[0203] In one embodiment, when the terminal is not configured with an XDD system indicator or does not receive the indicator, the terminal may not receive synchronization signal blocks, downlink data channels, control channels, or reference signals scheduled by higher layer signaling or DCI formats 1_0, 1_1, or 0_1 in (multiple) symbols / (multiple) time slots in which a valid PRACH opportunity is configured (operation 1605).

[0204] In one embodiment, when the terminal is configured with or receives an XDD system indicator, the terminal can receive downlink channels and signals in (multiple) symbols / (multiple) time slots configured or scheduled by higher layer signaling or DCI. Figure 16 All operations described in should be performed in the order described, and the order of performing each operation can be changed or omitted.

[0205] [Method 2]

[0206] When the terminal is configured with an XDD indicator (defined in the fourth embodiment), in (multiple) symbols / (multiple) time slots configured with valid PRACH opportunities, the terminal may not receive synchronization signal blocks, downlink data channels, control channels and reference signals through high-layer signaling, but may receive downlink data channels, control channels and reference signals scheduled through DCI formats 1_0, 1_1 or 0_1.

[0207] As described above, from the perspective of the base station, in the case where downlink channel / signal transmission and uplink random access channel reception are performed in the same symbol, there may be an interference effect on the base station due to the OOB transmission of the downlink channel / signal transmission. In addition, from the perspective of the terminal, the terminal that transmits the uplink random access channel may have an interference effect on the nearby terminal receiving the downlink due to the OOB transmission. Therefore, the reception of the downlink channel / signal in the time domain symbol in which the random access channel can be received should be controlled in real time to avoid the interference effect as much as possible. In this case, because the synchronization signal block, downlink data channel, control channel and reference signal configured through high-layer signaling are pre-configured information, unlike scheduling through DCI (L1 signaling), it may be difficult to control the synchronization signal block, downlink data channel, control channel and reference signal in real time.

[0208] Therefore, a terminal configured with an XDD indicator can receive a downlink data channel, a control channel or a reference signal scheduled by DCI, which enables the base station to control the interference effect caused by OOB transmission in real time even in the time domain symbols where the random access channel can be sent, thereby enhancing uplink / downlink coverage.

[0209] Figure 17 is a diagram illustrating another method for a terminal to determine whether to receive a downlink channel and signal according to an embodiment of the present disclosure.

[0210] Reference Figure 17 The terminal can know the position of (multiple) symbols / (multiple) time slots configured with valid PRACH opportunities based on cell-specific configuration information through received SIB information or higher-layer signaling (operation 1701). The terminal can determine whether received symbols of synchronization signal blocks, downlink data channels, control channels, or reference signals configured or scheduled through higher-layer signaling or DCI formats 1_0, 1_1, or 0_1 overlap based on the time domain (operation 1702).

[0211] In an embodiment, if the received symbols of the configured or scheduled synchronization signal blocks, downlink data channels, control channels, or reference signals do not overlap based on the time domain, the terminal may receive the downlink channel or signal in the configured or scheduled symbols (operation 1703). In an embodiment, if the received symbols overlap based on the time domain, the terminal may determine whether an XDD system indicator (or the priority rule change indicator described in the fourth embodiment) is configured or received (operation 1704).

[0212] In one embodiment, when the terminal is not configured with an XDD system indicator or does not receive the indicator, the terminal may not receive synchronization signal blocks, downlink data channels, control channels or reference signals scheduled by higher layer signaling or DCI formats 1_0, 1_1 or 0_1 in (multiple) symbols / (multiple) time slots configured with valid PRACH opportunities (operation 1705).

[0213] In one embodiment, when the terminal is configured with or receives an XDD system indicator, the terminal may determine whether the downlink channel or signal is a downlink channel and signal scheduled by DCI format 1_0, 1_1 or 0_1 (operation 1706). In an embodiment, when the downlink channel or signal is not a downlink channel and signal scheduled by DCI, the terminal may not receive the downlink channel and signal (operation 1707). In one embodiment, when the downlink channel or signal is scheduled by DCI, the terminal may receive the downlink channel and signal (operation 1708). Figure 17 All operations described in should be performed in the order described, and the order of performing each operation can be changed or omitted.

[0214] [Method 3]

[0215] When the terminal is configured with an XDD indicator (defined in the fourth embodiment), the terminal may not receive downlink data channels, control channels and reference signals in (multiple) symbols / (multiple) time slots configured with valid PRACH opportunities, but may receive synchronization signal blocks.

[0216] As described above, from the perspective of the base station, when downlink channel / signal transmission and uplink random access channel reception are performed in the same symbol, there may be an interference effect on the base station due to the OOB transmission of the downlink channel / signal transmission. In addition, from the perspective of the terminal, the terminal that transmits the uplink random access channel may have an interference effect on the nearby terminal receiving the downlink due to the OOB transmission. In order to minimize the interference effect, the terminal can receive a downlink channel / signal with a high priority in the symbol where the uplink random access channel can be transmitted. In this case, the channel with the highest priority can be a synchronization signal block. Therefore, a terminal configured with an XDD indicator can receive a synchronization signal block with the highest priority even in the time domain symbol where the random access channel can be transmitted, thereby extending the coverage range.

[0217] Figure 18 is a diagram illustrating another method for a terminal to determine whether to receive a downlink channel and signal according to an embodiment of the present disclosure.

[0218] Reference Figure 18The terminal can know the position of (multiple) symbols / (multiple) time slots in which valid PRACH opportunities are configured based on cell-specific configuration information through received SIB information or higher-layer signaling (operation 1801). The terminal can determine whether received symbols of synchronization signal blocks, downlink data channels, control channels, or reference signals configured or scheduled through higher-layer signaling or DCI formats 1_0, 1_1, or 0_1 overlap based on the time domain (operation 1802).

[0219] In one embodiment, when the received symbols of the configured or scheduled synchronization signal blocks, downlink data channels, control channels, or reference signals do not overlap based on the time domain, the terminal may receive the downlink channel or signal in the configured or scheduled symbols (operation 1803). In an embodiment, when the received symbols overlap based on the time domain, the terminal may determine whether an XDD system indicator (or the priority rule change indicator described in the fourth embodiment) is configured or received (operation 1804).

[0220] In one embodiment, when the terminal is not configured with an XDD system indicator or does not receive the indicator, the terminal may not receive synchronization signal blocks, downlink data channels, control channels or reference signals scheduled by higher layer signaling or DCI formats 1_0, 1_1 or 0_1 in (multiple) symbols / (multiple) time slots in which valid PRACH opportunities are configured (operation 1805).

[0221] In one embodiment, when the terminal is configured with or receives an XDD system indicator, the terminal may determine whether the downlink channel or signal is an actual synchronization signal block configured through high-layer signaling (operation 1806). In one embodiment, when the downlink channel or signal is not a synchronization signal block configured through high-layer signaling, the terminal may not receive the synchronization signal block in (multiple) symbols / (multiple) time slots configured with a valid PRACH opportunity (operation 1807). In one embodiment, when it is determined that the downlink channel or signal is a synchronization signal block, the terminal may receive the synchronization signal block in (multiple) symbols / (multiple) time slots configured with a valid PRACH opportunity (operation 1808). Not Figure 18 All operations described in should be performed in the order described, and the order of performing each operation can be changed or omitted.

[0222] In the above method, when the XDD indicator (defined in the fourth embodiment) is configured, the method of determining and receiving a downlink channel or signal at a time domain position of a valid PRACH opportunity is not limited to a synchronization signal block, and can also be applied to other downlink channels or signals, such as a downlink data channel, a control channel, and a reference signal.

[0223] <Third embodiment>

[0224] The third embodiment of the present disclosure relates to a method by which a terminal transmits an uplink channel / signal when uplink-downlink configuration information in a time slot / symbol format is semi-permanently and gradually indicated via cell-specific configuration information in system information and user-specific configuration information in higher-layer signaling and is configured as a downlink. By the uplink channel or signal transmission method of this embodiment, when a base station sends an indicator to the terminal (the indicator transmission method and the operation using the indicator are described in the fourth embodiment), the time domain resources in which the terminal can transmit the uplink can be increased, thereby enhancing the uplink coverage between the terminal and the base station.

[0225] This embodiment is not limited to the method in which the uplink-downlink configuration information is semi-permanently and gradually indicated via cell-specific configuration information through system information and user-specific configuration information through high-layer signaling and is configured as a downlink, and can also be applied to a method in which a terminal receives a downlink channel / signal in a case where the uplink-downlink configuration information is configured as an uplink.

[0226] In detail, as described above, the uplink-downlink configuration information can be semi-permanently and gradually indicated via cell-specific configuration information through system information and user-specific configuration information through dedicated high-layer signaling. In this case, the symbol / time slot configured as the downlink is a format pre-configured in the terminal, so the terminal does not need to send the channel and signal of the link. Therefore, the terminal and the base station do not consider the operation of the other link in the symbol / time slot in which the uplink-downlink configuration information is pre-configured, thereby reducing the complexity. However, in the case where a terminal supporting TDD and a terminal supporting XDD coexist, pre-configuring the uplink-downlink configuration information may be advantageous for the complexity of the TDD terminal and the base station, but for the coverage extension of the XDD terminal, it may be necessary to add another operation of the time domain resources of the uplink in the configuration.

[0227] Therefore, this embodiment provides a method by which, in an XDD system, a terminal transmits an uplink channel / signal when uplink-downlink configuration information is semi-permanently and step-by-step indicated via cell-specific configuration information through system information and user-specific configuration information through dedicated higher-layer signaling and is configured as a downlink.

[0228] The following method may be considered as a method for a terminal to determine whether to transmit an uplink channel and signal in an XDD system.

[0229] [Method 1]

[0230] When the terminal is configured with an XDD indicator (defined in the fourth embodiment), the terminal can send uplink data channels, control channels, random access channels and SRS through high-layer signaling in time slots / symbols in which the uplink-downlink configuration information is configured as downlink, as well as uplink data, control, random access channels or SRS scheduled by DCI formats 0_0, 0_1, 1_0, 1_1 or 2_3. In this case, if the base station is able to fully control the interference effect caused by OOB transmission, the terminal configured with the XDD indicator can even send uplink data, control, random access channels or SRS in the time domain symbols in which the base station sends synchronization signal blocks, thereby enhancing uplink coverage.

[0231] Figure 19 is a diagram illustrating a method in which a terminal determines whether to transmit an uplink channel and signal according to an embodiment of the present disclosure.

[0232] Reference Figure 19 The terminal can know that the uplink-downlink configuration information is configured as a downlink time slot / symbol through received SIB information or higher-layer signaling (operation 1901). The terminal can determine based on the time domain whether the transmission symbols of uplink data, control, random access channel, or SRS 1108 / 1109 configured or scheduled through higher-layer signaling or DCI format 0_0, 0_1, 1_0, 1_1, or 2_3 overlap (operation 1902).

[0233] In one embodiment, when the transmission symbols of the configured or scheduled uplink data, control, random access channel, or SRS 1108 / 1109 do not overlap based on the time domain, the terminal may transmit the uplink channel or signal 1108 / 1109 in the configured or scheduled symbols (operation 1903). In one embodiment, when the transmission symbols overlap based on the time domain, the terminal may determine whether an XDD system indicator (or the priority rule change indicator described in the fourth embodiment) is configured or received (operation 1904).

[0234] In one embodiment, when the terminal is not configured with an XDD system indicator or does not receive the indicator, the terminal may not send uplink data, control, random access channel or SRS scheduled by higher layer signaling or DCI format 0_0, 0_1, 1_0, 1_1 or 2_3 in the (multiple) time domain slots / (multiple) time slots in which the uplink-downlink configuration information is configured as downlink (operation 1905).

[0235] In one embodiment, when the terminal is configured with or receives an XDD system indicator, the terminal may transmit uplink channels and signals 1108 / 1109 configured or scheduled by higher layer signaling or DCI 1106 (operation 1906). Figure 19 All operations described in should be performed in the order described, and the order of performing each operation can be changed or omitted.

[0236] [Method 2]

[0237] When the terminal is configured with an XDD indicator (defined in the fourth embodiment), in the time slot / symbol in which the uplink-downlink configuration information is configured as the downlink, the terminal may not send the uplink data channel, control channel, random access channel and SRS through high-layer signaling, but may send uplink data, control, random access channel or SRS scheduled by DCI format 0_0, 0_1, 1_0, 1_1 or 2_3. As described above, when uplink channel signal reception is performed in the time slot / symbol in which the uplink-downlink configuration information is configured as the downlink, from the perspective of the terminal, due to OOB transmission, the terminal receiving the downlink channel / signal may have an interference effect on the nearby terminal sending the uplink channel / signal. Therefore, the transmission of the uplink channel / signal in the time slot / symbol in which the uplink-downlink configuration information is configured as the downlink should be controlled in real time to avoid the interference effect as much as possible. In this case, because the uplink data channel, control channel, random access channel and SRS configured through high-layer signaling are pre-configured information, unlike the scheduling through downlink control information (L1 signaling), it may be difficult to control the uplink data channel, control channel, random access channel and SRS in real time.

[0238] Therefore, a terminal configured with an XDD indicator can send uplink data, control, random access channel or SRS scheduled by DCI, which enables the base station to control the interference effect caused by OOB transmission in real time even in the time slot / symbol in which the uplink-downlink configuration information is configured as downlink, thereby enhancing uplink coverage.

[0239] Figure 20 is a diagram illustrating another method for a terminal to determine whether to transmit an uplink channel and signal according to an embodiment of the present disclosure.

[0240] Reference Figure 20 The terminal can know that the uplink-downlink configuration information is configured as a downlink time slot / symbol through received SIB information or higher-layer signaling (operation 2001). The terminal can determine based on the time domain whether the transmission symbols of uplink data, control, random access channel, or SRS 1108 / 1109 configured or scheduled through higher-layer signaling or DCI formats 0_0, 0_1, 1_0, 1_1, or 2_3 overlap (operation 2002).

[0241] In one embodiment, when the transmission symbols of the configured or scheduled uplink data, control, random access channel, or SRS 1108 / 1109 do not overlap based on the time domain, the terminal may transmit the uplink channel or signal 1108 / 1109 in the configured or scheduled symbols (operation 2003). In one embodiment, when the transmission symbols overlap based on the time domain, the terminal may determine whether an XDD system indicator (or the priority rule change indicator described in the fourth embodiment) is configured or received (operation 2004).

[0242] In one embodiment, when the terminal is not configured with an XDD system indicator or does not receive the indicator, the terminal may not send uplink data, control, random access channel or SRS scheduled by higher layer signaling or DCI format 0_0, 0_1, 1_0, 1_1 or 2_3 in (multiple) time domain slots / (multiple) symbols in which the uplink-downlink configuration information is configured as downlink (operation 2005).

[0243] In one embodiment, when the terminal is configured with or receives an XDD system indicator, the terminal may determine whether the uplink channel and signal are uplink channels and signals 1109 scheduled by DCI 1106 format 0_0, 0_1, 1_0, 1_1, or 2_3 (operation 2006). When the uplink channel and signal are not uplink channels and signals scheduled by DCI, the terminal may not send uplink channels and signals 1108 (operation 2007). When the uplink channel and signal are scheduled by DCI 1106, the terminal may send uplink channels and signals 1109 (operation 2008). Figure 20 All operations described in should be performed in the order described, and the order of performing each operation can be changed or omitted.

[0244] [Method 3]

[0245] When the terminal is configured with an XDD indicator (defined in the fourth embodiment), in the time domain uplink-downlink configuration information is configured as (multiple) time slots / (multiple) symbols of the downlink, the terminal may not send an uplink control channel, a random access channel, and an SRS, but may send an uplink data channel.

[0246] As described above, when uplink channel signal reception is performed in a time slot / symbol in which the uplink-downlink configuration information is configured as a downlink, from the perspective of the terminal, the terminal transmitting the uplink channel / signal may have an interference effect on a nearby terminal receiving a downlink channel / signal due to OOB transmission. In order to minimize the interference effect, an uplink channel / signal with a high priority may be transmitted in a time slot / symbol in which the uplink-downlink configuration information is configured as a downlink. In this case, from the perspective of coverage extension between the base station and the terminal, the channel with the highest priority may be the uplink data channel.

[0247] According to an embodiment, because the uplink data channel has the smallest coverage among the uplink / downlink channels and signals, the total coverage between the base station and the terminal can be determined by the uplink data channel. Therefore, the terminal configured with the XDD indicator can transmit the uplink data channel with the highest priority in the time domain time slot / symbol configured as the downlink in the uplink-downlink configuration information, thereby extending the coverage.

[0248] Figure 21 is a diagram illustrating another method for a terminal to determine whether to transmit an uplink channel and signal according to an embodiment of the present disclosure.

[0249] Reference Figure 21 The terminal can know that the uplink-downlink configuration information is configured as a downlink time slot / symbol through received SIB information or higher-layer signaling (operation 2101). The terminal can determine based on the time domain whether the transmission symbols of uplink data, control, random access channel, or SRS 1108 / 1109 configured or scheduled through higher-layer signaling or DCI format_0, 0_1, 1_0, 1_1, or 2_3 overlap (operation 2102).

[0250] In an embodiment, when the transmission symbols of the configured or scheduled uplink data, control, random access channel, or SRS 1108 / 1109 do not overlap based on the time domain, the terminal may transmit the uplink channel or signal 1108 / 1109 in the configured or scheduled symbols (operation 2103). In an embodiment, when the transmission symbols overlap based on the time domain, the terminal may determine whether an XDD system indicator (or the priority rule change indicator described in the fourth embodiment) is configured or received (operation 2104).

[0251] In one embodiment, when the terminal is not configured with an XDD system indicator or does not receive the indicator, the terminal may not send uplink data, control, random access channel or SRS scheduled by higher layer signaling or DCI format 0_0, 0_1, 1_0, 1_1 or 2_3 in (multiple) time domain slots / (multiple) symbols in which the uplink-downlink configuration information is configured as downlink (operation 2105).

[0252] In one embodiment, when the terminal is configured with or receives an XDD system indicator, the terminal may determine whether the uplink channel is an uplink data channel 1109 scheduled by high-layer signaling or DCI (operation 2106). When the uplink channel is not an uplink data channel, the terminal may not send the uplink channel in the time slot / symbol in which the uplink-downlink configuration information is configured as a downlink (operation 2107). When it is determined that the uplink channel is an uplink data channel, the terminal may send the uplink data channel in the time slot / symbol in which the uplink-downlink configuration information is configured as a downlink (operation 2108). Figure 21 All operations described in should be performed in the order described, and the order of performing each operation can be changed or omitted.

[0253] In the above method, when the XDD indicator (defined in the fourth embodiment) is configured, the method of determining and transmitting the uplink channel or signal in the time domain slot / symbol in which the uplink-downlink configuration information is configured as the downlink is not limited to the data channel, and can also be applied to other uplink channels or signals, such as control channels, random access and SRS.

[0254] [Method 4]

[0255] When the terminal is configured with an XDD indicator (defined in the fourth embodiment), the terminal can send uplink data channels, control channels, random access channels and SRS when different additional conditions for each channel are met in the uplink-downlink configuration information configured as (multiple) time domain time slots / (multiple) symbols of the downlink.

[0256] As described above, when uplink channel signal reception is performed in a time slot / symbol in which the uplink-downlink configuration information is configured as a downlink, from the perspective of the terminal, the terminal transmitting the uplink channel / signal may have an interference effect on a nearby terminal receiving the downlink channel / signal due to OOB transmission. In order to minimize the interference effect, when the base station performs scheduling and coverage-related configuration on the terminal when the coverage between the base station and the terminal is poor, the terminal may transmit the uplink channel or signal in a time slot / symbol in which the uplink-downlink configuration information is configured as a downlink. The coverage-related configuration may include at least one of the following configurations.

[0257] - a specific number of repetitions of a data channel or more

[0258] -Pi / 2-BPSK modulation

[0259] -DFT-s-OFDM transmission method

[0260] - a specific aggregation level or more of downlink control channels used to schedule uplink channels or signals

[0261] - New Radio Network Temporary Identifier (RNTI) for DCI used to schedule uplink channels or signals

[0262] -Frequency Hopping

[0263] -Specific uplink control channel format

[0264] -Specific TPC commands

[0265] -Specific MCS index or lower

[0266] -Specific PRACH configuration index

[0267] Based on the coverage-related configuration, the terminal can determine whether to transmit an uplink channel or signal in the time domain time slot / symbol configured as downlink in the uplink-downlink configuration information. The coverage-related configuration can vary for each uplink channel or signal. Therefore, when the coverage-related configuration is scheduled, a terminal configured with an XDD indicator can transmit an uplink channel or signal even in the time slot / symbol configured as downlink in the uplink-downlink configuration information, thereby extending coverage.

[0268] Figure 22 is a diagram illustrating another method for a terminal to determine whether to transmit an uplink channel and signal according to an embodiment of the present disclosure.

[0269] Reference Figure 22The terminal can know that the uplink-downlink configuration information is configured as a downlink time slot / symbol through received SIB information or higher-layer signaling (operation 2201). The terminal can determine whether the transmission symbols of uplink data, control, random access channel, or SRS 1108 / 1109 configured or scheduled through higher-layer signaling or DCI format 0_0, 0_1, 1_0, 1_1, or 2_3 overlap based on the time domain (operation 2202).

[0270] In an embodiment, when the transmission symbols of the configured or scheduled uplink data, control, random access channel, or SRS 1108 / 1109 do not overlap based on the time domain, the terminal may transmit the uplink channel or signal 1108 / 1109 in the configured or scheduled symbols (operation 2203). In an embodiment, when the transmission symbols overlap based on the time domain, the terminal may determine whether an XDD system indicator (or the priority rule change indicator described in the fourth embodiment) is configured or received (operation 2204).

[0271] In one embodiment, when the terminal is not configured with an XDD system indicator or does not receive the indicator, the terminal may not send uplink data, control, random access channel or SRS scheduled by higher layer signaling or DCI format 0_0, 0_1, 1_0, 1_1 or 2_3 in the (multiple) time domain slots / (multiple) symbols in which the uplink-downlink configuration information is configured as downlink (operation 2205).

[0272] In one embodiment, when the terminal is configured with or receives an XDD system indicator, the terminal may determine whether the uplink channel or signal is scheduled together with the coverage-related configuration through high-layer signaling or DCI (operation 2206). In one embodiment, when the terminal does not receive the coverage-related configuration, the terminal may not send the uplink channel / signal in the time slot / symbol in which the uplink-downlink configuration information is configured as the downlink (operation 2207). In one embodiment, when the terminal receives the coverage-related configuration, the terminal may send the scheduled uplink channel / signal in the time slot / symbol in which the uplink-downlink configuration information is configured as the downlink (operation 2208). Not Figure 22 All operations described in should be performed in the order described, and the order of performing each operation can be changed or omitted.

[0273] <Fourth embodiment>

[0274] The fourth embodiment relates to the operation of a terminal after the base station configures an XDD indicator (priority rule indicator) in the terminal in the first, second, and third embodiments. Specifically, as described above, as described in the first, second, and third embodiments, an indicator may be required to configure the terminal for an XDD system, in which uplink and downlink resources are divided not only in time but also in frequency. Specifically, when a terminal supporting TDD and an XDD coexist without an indicator, when both an uplink transmission configuration and a downlink reception configuration are received simultaneously in the same symbol, the operations of the TDD and XDD terminals are inevitably identical. In this case, the operation of the terminal, which performs the same as in a TDD system, may be very limited in supporting the XDD system. Specifically, as in the first, second, and third embodiments, the operation of the terminal in a symbol may be limited to downlink reception or uplink transmission via cell-specific system information. Therefore, when the base station configures the XDD indicator in the terminal, the terminal configured with the XDD indicator can perform operations different from those of the TDD terminal.

[0275] Therefore, the following method can be considered as a method for the base station to configure the XDD indicator in the terminal.

[0276] [Method 1]

[0277] The base station can explicitly or implicitly configure the XDD indicator in the terminal through system information including cell-specific configuration information, terminal-specific high-layer signaling, MACCE or DCI. In this case, the terminal configured with the XDD indicator can perform at least one of the above-mentioned embodiments. For example, the terminal configured with the XDD indicator can perform the first embodiment, but may not perform the second and third embodiments. That is, when the time domain position of the synchronization signal block is configured in the XDD system, the method used by the terminal to send an uplink channel or signal can be applied. In addition, when a valid PRACH opportunity is configured, the terminal may not receive a downlink channel / signal as in a TDD system. In the above method, the operation when the terminal is configured with the XDD indicator is not limited to the first, second and third embodiments, and an operation different from the operation of the TDD terminal when the uplink transmission configuration and the downlink reception configuration are simultaneously received in the same symbol can be applied.

[0278] [Method 2]

[0279] The base station can explicitly or implicitly configure the XDD indicator in the terminal through system information including cell-specific configuration information, terminal-specific high-layer signaling, MACCE or DCI. In this case, the terminal can perform the operations of different embodiments according to the location where the XDD indicator is configured. For example, when the terminal is configured with an indicator in system information including cell-specific configuration information, the terminal can perform the terminal operations of the first embodiment and the second embodiment related to the cell-specific configuration information. Alternatively, when the terminal is configured through terminal-specific high-layer signaling, the terminal can perform the terminal operations of the third embodiment related to the terminal-specific configuration information. In the above method, the operation when the terminal is configured with the XDD indicator is not limited to the first embodiment, the second embodiment and the third embodiment, and an operation different from the operation of the TDD terminal when the uplink transmission configuration and the downlink reception configuration are simultaneously received in the same symbol can be applied.

[0280] [Method 3]

[0281] The base station may explicitly or implicitly configure the XDD indicator in the terminal through system information including cell-specific configuration information, terminal-specific high-layer signaling, MAC CE, or DCI. In this case, the XDD indicator may indicate at least one of the predefined operations of the terminal. The predefined operation of the terminal may include at least one of the following operations.

[0282] First embodiment: a method for a terminal to transmit an uplink channel or signal when a time domain position for transmitting a synchronization signal block is configured

[0283] Second embodiment: Method for a terminal to receive a downlink channel or signal when a valid PRACH opportunity is configured

[0284] Third embodiment: Method for a terminal to receive a downlink channel / signal or a method for a terminal to transmit an uplink channel / signal when a time slot / symbol format is configured as uplink or downlink

[0285] For example, an XDD indicator configured by system information including cell-specific configuration information, terminal-specific high-layer signaling, MAC CE, or DCI can instruct a specific terminal to perform the methods included in the first and third embodiments, and can instruct other specific terminals to perform the methods included in the first and second embodiments. In the above method, the operation when the terminal is configured with the XDD indicator is not limited to the first, second, and third embodiments, and an operation different from the operation of a TDD terminal when simultaneously receiving an uplink transmission configuration and a downlink reception configuration in the same symbol can be applied.

[0286] Figure 23 is a block diagram illustrating a terminal according to an embodiment of the present disclosure.

[0287] Reference Figure 23 , the terminal 2300 may include a transceiver 2310, a processor 2320, and a memory 2330. According to the efficient channel and signal transmission and reception method in the 5G communication system corresponding to the above-mentioned embodiment, the transceiver 2310, the processor 2320, and the memory 2330 of the terminal 2300 may operate. However, the elements of the terminal 2300 according to the embodiment are not limited to Figure 23 According to another embodiment, the terminal 2300 may include Figure 23 More or fewer elements may be shown. In addition, in certain cases, the transceiver 2310, the processor 2320, and the memory 2330 may be implemented as one chip.

[0288] According to another embodiment, the transceiver 2310 may include a transmitter and a receiver. The transceiver 2310 may transmit and receive signals to and from a base station. The signals may include control information and data. The transceiver 2310 may include a radio frequency (RF) transmitter for up-converting and amplifying the frequency of a transmitted signal, and an RF receiver for low-noise amplification and down-converting the frequency of a received signal. In addition, the transceiver 2310 may receive a signal via a radio channel and output the received signal to the processor 2320, and transmit a signal output from the processor 2320 via a radio channel.

[0289] According to an embodiment of the present disclosure, the processor 2320 may control a series of processes performed by the terminal 2300. For example, according to an embodiment of the present disclosure, the processor 2320 may control elements of the terminal 2300 to execute a method for transmitting and receiving channels and signals. A plurality of processors 2320 may be provided. The processor 2320 may execute a program stored in the memory 2330 to perform the channel and signal transmission and reception operations of the present disclosure. For example, according to an embodiment of the present disclosure, the processor 2320 may control various channel and signal transmission and reception methods, namely, a method for a terminal to transmit an uplink channel or signal when a time domain position for transmitting a synchronization signal block is configured in an XDD system, a method for a terminal to receive a downlink channel or signal when a PRACH timing is configured, a method for transmitting an uplink channel or signal in a time slot / symbol in which uplink-downlink configuration information is configured as a downlink, or a method for a base station to configure an XDD indicator in a terminal.

[0290] The memory 2330 may store programs and data required for operating the terminal 2300. In addition, the memory 2330 may store control information or data included in the signals sent and received by the terminal. The memory 1020 may include a storage medium such as a read-only memory (ROM), a random access memory (RAM), a hard disk, a compact disc (CD)-ROM, or a digital versatile disc (DVD), or a combination thereof. In addition, a plurality of memories 1020 may be provided. In one embodiment, the memory 2330 may store control information or data, such as resource configuration for transmitting synchronization signal blocks, effective random access channel transmission resource configuration, or uplink-downlink configuration information included in the signal obtained by the terminal 2300, and may have an area for storing data required for control by the processor 2320 and data generated during control by the processor 2320.

[0291] Figure 24 is a block diagram illustrating a base station according to an embodiment of the present disclosure.

[0292] Reference Figure 24 , the base station 2400 may include a transceiver 2410, a processor 2420, and a memory 2430. According to the efficient channel and signal transmission and reception method in the 5G communication system corresponding to the above-mentioned embodiment, the transceiver 2410, the processor 2420, and the memory 2430 of the base station 2400 may operate. However, the elements of the base station 2400 according to the embodiment are not limited to Figure 24 According to another embodiment, the base station 2400 may include Figure 24 More or fewer elements may be shown. In addition, in certain cases, the transceiver 2410, the processor 2420, and the memory 2430 may be implemented as one chip.

[0293] According to another embodiment, the transceiver 2410 may include a transmitter and a receiver. The transceiver 2410 may transmit and receive signals to and from the terminal. The signals may include control information and data. The transceiver 2410 may include an RF transmitter for up-converting and amplifying the frequency of the transmitted signal, and an RF receiver for low-noise amplification and down-converting the frequency of the received signal. In addition, the transceiver 2410 may receive signals via a radio channel and output the received signals to the processor 2420, and transmit signals output from the processor 2420 via the radio channel.

[0294] According to an embodiment of the present disclosure, the processor 2420 may control a series of processes performed by the base station 2400. For example, according to an embodiment of the present disclosure, the processor 2420 may control elements of the base station 2400 to execute a method for transmitting and receiving channels and signals. A plurality of processors 2420 may be provided. The processor 2420 may execute a program stored in the memory 2430 to perform the channel and signal transmission and reception operations of the present disclosure. For example, according to an embodiment of the present disclosure, the processor 2420 may control various channel and signal transmission and reception methods, namely, a method for a base station to receive an uplink channel or signal when a time domain position for transmitting a synchronization signal block is configured in an XDD system, a method for a base station to transmit a downlink channel or signal when a valid PRACH opportunity is configured, a method for a base station to receive an uplink channel or signal in a time slot / symbol in which uplink-downlink configuration information is configured as a downlink, or a method for a base station to configure an XDD indicator in a terminal.

[0295] The memory 2430 may store control information or data, such as resource configuration for sending a synchronization signal block, a valid random access channel transmission resource configuration, or uplink-downlink configuration information determined by the base station 2400 or control information or data received from the terminal, and may have an area for storing data required for the control of the processor 2420 and data generated during the control of the processor 2420.

[0296] According to an embodiment of the present disclosure, an operating method of a terminal in a wireless communication system includes: receiving information related to the position of a symbol of a sending synchronization signal block in the time domain from a base station, determining whether the position of a symbol configured to send an uplink signal overlaps with the position of a symbol of a sending synchronization signal block in the time domain, and in a case where the position of a symbol configured to send an uplink signal overlaps with the position of a symbol of a sending synchronization signal block in the time domain, determining whether a time or frequency division duplex (XDD) related indicator is configured or received, and based on the result of determining whether the XDD related indicator is configured or received, sending an uplink signal to the base station.

[0297] In a case where the position of the symbol configured to transmit the uplink signal does not overlap with the position of the symbol transmitting the synchronization signal block in the time domain, the uplink signal can be transmitted to the base station at the position of the symbol configured to transmit the uplink signal.

[0298] In one embodiment, sending an uplink signal to the base station based on the result of determining whether the XDD-related indicator is configured or received may include, if it is determined that the XDD-related indicator is configured or received, sending the uplink signal at the position of the symbol configured to send the uplink signal.

[0299] In case that the XDD-related indicator is not configured or is not received, the uplink signal may not be transmitted to the base station at the position of the symbol configured to transmit the uplink signal.

[0300] According to an embodiment, sending an uplink signal to a base station based on a result of determining whether an XDD-related indicator is configured or received may include: in a case where it is determined that the XDD-related indicator is configured or received, determining whether to schedule the uplink signal through downlink control information, and in a case where it is determined that the uplink signal is scheduled through downlink control information, sending the scheduled uplink signal to the base station at the position of the symbol configured to send the uplink signal.

[0301] In the case where an uplink signal is not scheduled by the downlink control information, the uplink signal may not be transmitted at a position of a symbol configured to transmit the uplink signal.

[0302] According to an embodiment, sending an uplink signal to a base station based on a result of determining whether an XDD-related indicator is configured or received may include: in a case where it is determined that the XDD-related indicator is configured or received, determining whether the uplink signal corresponds to an uplink data channel, and in a case where it is determined that the uplink signal corresponds to the uplink data channel, sending an uplink signal corresponding to the uplink data channel to the base station at a position of a symbol configured to send an uplink signal.

[0303] In a case where the uplink signal does not correspond to an uplink data channel, the uplink signal may not be transmitted at a position of a symbol configured to transmit the uplink signal.

[0304] According to one embodiment, sending an uplink signal to a base station based on a result of determining whether an XDD-related indicator is configured or received may include:

[0305] In case the configuration is determined or the XDD-related indicator is received, it is determined whether to schedule the uplink signal based on the coverage-related configuration, and in case the uplink signal is determined to be scheduled based on the coverage-related configuration, the scheduled uplink signal is transmitted to the base station.

[0306] In case the uplink signal is not scheduled based on the coverage-related configuration, the uplink signal may not be transmitted.

[0307] According to an embodiment, the XDD-related indicator may be configured through at least one of system information, terminal-specific higher layer signaling, a medium access control element (MAC CE), or downlink control information.

[0308] According to an embodiment of the present disclosure, an operating method of a terminal in a wireless communication system includes: receiving information related to the position of a symbol for configuring a random access channel opportunity in the time domain from a base station, determining whether the position of a symbol configured to receive a downlink signal overlaps with the position of a symbol for configuring a random access channel opportunity in the time domain, and in a case where the position of a symbol configured to receive a downlink signal overlaps with the position of a symbol for configuring a random access channel opportunity in the time domain, determining whether a time or frequency division duplex (XDD) related indicator is configured or received, and based on the result of determining whether the XDD related indicator is configured or received, receiving a downlink signal from the base station.

[0309] When the position of the symbol configured to receive the downlink signal does not overlap with the position of the symbol configuring the random access channel opportunity in the time domain, the downlink signal can be received from the base station at the position of the symbol configured to receive the downlink signal.

[0310] According to an embodiment, receiving a downlink signal from a base station based on a result of determining whether an XDD-related indicator is configured or received may include,

[0311] In case that the configuration is determined or the XDD-related indicator is received, a downlink signal is received from the base station at a position of a symbol configured to receive the downlink signal.

[0312] In case the XDD-related indicator is not configured or is not received, the downlink signal may not be transmitted from the base station at the position of the symbol configured to receive the downlink signal.

[0313] According to an embodiment, receiving a downlink signal from a base station based on a result of determining whether an XDD-related indicator is configured or received may include,

[0314] When it is determined that an XDD-related indicator is configured or received, it is determined whether a downlink signal is scheduled through downlink control information, and when it is determined that the downlink signal is scheduled through the downlink control information, the scheduled downlink signal is received from the base station at a position of a symbol configured to receive the downlink signal.

[0315] In a case where a downlink signal is not scheduled by the downlink control information, the downlink signal may not be received at a position of a symbol configured to receive the downlink signal.

[0316] According to an embodiment, receiving a downlink signal from a base station based on a result of determining whether an XDD-related indicator is configured or received may include,

[0317] In the case where it is determined that an XDD-related indicator is configured or received, it is determined whether the downlink signal corresponds to a synchronization signal block, and in the case where it is determined that the downlink signal corresponds to the synchronization signal block, a downlink signal corresponding to the synchronization signal block is received from the base station at a position of a symbol configured to receive the downlink signal.

[0318] In case that the downlink signal does not correspond to the synchronization signal block, the downlink signal may not be received at a position of a symbol configured to receive the downlink signal.

[0319] According to an embodiment of the present disclosure, an operating method of a terminal in a wireless communication system includes: based on system information or high-layer signaling, identifying the position of a symbol configured as a downlink through uplink-downlink configuration information, determining whether the position of a symbol configured to send an uplink signal overlaps with the position of a symbol configured as a downlink in the time domain, and in a case where the position of the symbol configured to send an uplink signal overlaps with the position of a symbol configured as a downlink in the time domain, determining whether a time or frequency division duplex (XDD) related indicator is configured or received, and based on the result of determining whether the XDD related indicator is configured or received, sending an uplink signal to a base station.

[0320] In the case where the position of the symbol configured to transmit the uplink signal does not overlap with the position of the symbol configured for the downlink in the time domain, the uplink signal can be transmitted to the base station at the position of the symbol configured to transmit the uplink signal.

[0321] According to one embodiment, sending an uplink signal to a base station based on a result of determining whether an XDD-related indicator is configured or received may include:

[0322] In case the configuration is determined or the XDD-related indicator is received, an uplink signal is transmitted to the base station at a position of a symbol configured to transmit the uplink signal.

[0323] In case that the XDD-related indicator is not configured or is not received, the uplink signal may not be transmitted to the base station at the position of the symbol configured to transmit the uplink signal.

[0324] According to one embodiment, sending an uplink signal to a base station based on a result of determining whether an XDD-related indicator is configured or received may include:

[0325] When it is determined that an XDD-related indicator is configured or received, it is determined whether an uplink signal is scheduled through downlink control information, and when it is determined that an uplink signal is scheduled through downlink control information, the scheduled uplink signal is sent to the base station at the position of the symbol configured to send the uplink signal.

[0326] In a case where an uplink signal is not scheduled by downlink control information, the uplink signal may not be transmitted at a position of a symbol configured to transmit the uplink signal.

[0327] According to one embodiment, sending an uplink signal to a base station based on a result of determining whether an XDD-related indicator is configured or received may include:

[0328] In the case where it is determined that an XDD-related indicator is configured or received, it is determined whether the uplink signal corresponds to an uplink data channel, and in the case where it is determined that the uplink signal corresponds to the uplink data channel, the uplink signal corresponding to the uplink data channel is sent to the base station at the position of the symbol configured to send the uplink signal.

[0329] In a case where the uplink signal does not correspond to an uplink data channel, the uplink signal may not be transmitted at a position of a symbol configured to transmit the uplink signal.

[0330] According to one embodiment, sending an uplink signal to a base station based on a result of determining whether an XDD-related indicator is configured or received may include:

[0331] In case the configuration is determined or the XDD-related indicator is received, it is determined whether to schedule the uplink signal based on the coverage-related configuration, and in case the uplink signal is determined to be scheduled based on the coverage-related configuration, the scheduled uplink signal is transmitted to the base station.

[0332] In case the uplink signal is not scheduled based on the coverage-related configuration, the uplink signal may not be transmitted.

[0333] It should be understood that the embodiments of the disclosure described herein should be considered to be merely illustrative and not for the purpose of limitation. That is, it will be understood by those of ordinary skill in the art that various changes in form and detail may be made in the embodiments of the present disclosure without departing from the spirit and scope of the present disclosure. Furthermore, these embodiments may be combined with each other as needed.

[0334] The methods according to the embodiments of the present disclosure described in the detailed description or the appended claims can be implemented as hardware, software, or a combination of hardware and software.

[0335] When the method is implemented as software, a computer-readable storage medium or computer program product storing one or more programs (software modules) may be provided. The one or more programs or computer program products stored in the computer-readable storage medium are configured to be executable by one or more processors in an electronic device. The one or more programs include instructions for allowing the electronic device to perform the method according to the claims or embodiments of the present disclosure.

[0336] The program (e.g., software module or software) may be stored in a non-volatile memory, including random access memory (RAM) or flash memory, read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), magnetic disk storage, compact disk (CD-ROM), digital versatile disk (DVD), another optical storage device, or magnetic tape cassette. Alternatively, the program may be stored in a memory comprising any combination of some or all of the aforementioned storage media. Furthermore, a plurality of such component memories may be provided.

[0337] In addition, the program can be stored in an attachable storage device that can be accessed 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 combination thereof. Such a storage device can access the electronic device for executing the embodiments of the present disclosure via an external port. In addition, an attached storage device on a communication network can access the electronic device to execute the embodiments of the present disclosure.

[0338] In this disclosure, the term "computer program product" or "computer-readable recording medium" is used to broadly refer to a memory, a hard disk installed in a hard disk drive, and a medium such as a signal. This "computer program product" or "computer-readable recording medium" is a means for providing the method of transmitting and receiving channels and signals according to this disclosure.

[0339] In the foregoing embodiments of the present disclosure, the elements included in the present disclosure are expressed in singular or plural form according to the embodiments of the present disclosure. However, for the conditions provided for ease of explanation, the singular or plural form is appropriately selected, and the present disclosure is not limited to the singular or plural form. An element expressed in a singular form may include multiple elements, while an element expressed in a plural form may include a single element.

[0340] While specific embodiments of the present disclosure have been described in the detailed description of the present disclosure, it should be understood that various modifications may be made without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure is not limited to the above-described embodiments of the present disclosure, and is defined not only by the appended claims but also by the equivalents of the claims.

Claims

1. A method for operating a terminal in a wireless communication system, the method comprising: receiving, from a base station, information related to at least one symbol in which a synchronization signal block (SSB) is transmitted; receiving, from the base station, information related to at least one symbol for an uplink signal; determining whether the at least one symbol for the uplink signal overlaps in the time domain with the at least one symbol in which the SSB is transmitted; In a case where the at least one symbol for the uplink signal overlaps with the at least one symbol in which the SSB is transmitted in the time domain, determining whether a time or frequency division duplex (XDD) related indicator is received from the base station, the XDD related indicator indicating whether the uplink signal is transmitted on the at least one symbol overlapping in the time domain or not transmitted on the at least one symbol overlapping in the time domain; and transmitting the uplink signal to the base station on the at least one symbol overlapping in the time domain based on receiving the XDD-related indicator from the base station, and wherein, based on not receiving the XDD-related indicator from the base station, not sending the uplink signal to the base station on the at least one symbol overlapping in the time domain; and When the at least one symbol used for the uplink signal does not overlap with the at least one symbol in which the SSB is transmitted in the time domain, the uplink signal is transmitted to the base station on the at least one symbol used for the uplink signal.

2. The operating method according to claim 1, further comprising: determining, based on receiving the XDD-related indicator from the base station, whether the uplink signal is scheduled through downlink control information (DCI); and In a case where it is determined that the uplink signal is scheduled by the DCI, sending the scheduled uplink signal to the base station on the at least one symbol overlapping in the time domain, Wherein, when the uplink signal is not scheduled by the DCI, the uplink signal is not sent to the base station on the at least one symbol that overlaps in the time domain.

3. The operating method according to claim 1, further comprising: determining whether the uplink signal corresponds to an uplink data channel based on receiving the XDD-related indicator from the base station; and In a case where it is determined that the uplink signal corresponds to the uplink data channel, transmitting the uplink signal corresponding to the uplink data channel to the base station on the at least one symbol overlapping in the time domain, in, In a case where the uplink signal does not correspond to the uplink data channel, the uplink signal is not transmitted to the base station on the at least one symbol overlapping in the time domain.

4. The operating method according to claim 1, further comprising: determining, based on receiving the XDD-related indicator from the base station, whether the uplink signal is scheduled with a coverage-related configuration; and In a case where it is determined that the uplink signal is scheduled together with the coverage-related configuration, transmitting the scheduled uplink signal to the base station on the at least one symbol overlapping in the time domain, in, In a case where the uplink signal is not scheduled together with the coverage-related configuration, the uplink signal is not transmitted to the base station on the at least one symbol overlapping in the time domain.

5. The operating method according to claim 1, wherein: The XDD-related indicator is received through at least one of system information, terminal-specific higher layer signaling, a medium access control element MAC CE, or downlink control information DCI.

6. A method for operating a terminal in a wireless communication system, the method comprising: receiving, from a base station, information related to at least one symbol in which a random access channel (RACH) opportunity is configured; receiving, from the base station, information related to at least one symbol for a downlink signal; determining whether the at least one symbol for the downlink signal overlaps in the time domain with the at least one symbol in which the RACH opportunity is configured; In a case where the at least one symbol for the downlink signal overlaps with the at least one symbol in which the RACH opportunity is configured in the time domain, determining whether a time or frequency division duplex (XDD) related indicator is received from the base station, the XDD related indicator indicating whether the downlink signal is received on the at least one symbol overlapping in the time domain or is not received on the at least one symbol overlapping in the time domain; and receiving the downlink signal from the base station on the at least one symbol overlapping in the time domain based on receiving the XDD-related indicator from the base station, and wherein, based on not receiving the XDD-related indicator from the base station, not receiving the downlink signal from the base station on the at least one symbol overlapping in the time domain; and The downlink signal is received from the base station on the at least one symbol for the downlink signal in a case where the at least one symbol for the downlink signal and the at least one symbol in which the RACH opportunity is configured do not overlap in the time domain.

7. The operating method according to claim 6, further comprising: determining whether the downlink signal is scheduled by downlink control information (DCI) based on the XDD-related indicator received from the base station; and In a case where it is determined that the downlink signal is scheduled by the DCI, receiving the scheduled downlink signal from the base station on the at least one symbol overlapping in the time domain, and in, In a case where the downlink signal is not scheduled by the DCI, the downlink signal is not received from the base station on the at least one symbol overlapping in the time domain.

8. The operating method according to claim 6, further comprising: determining whether the downlink signal corresponds to a synchronization signal block (SSB) based on receiving the XDD-related indicator from the base station; and In a case where it is determined that the downlink signal corresponds to the SSB, receiving the downlink signal corresponding to the SSB from the base station on the at least one symbol overlapping in the time domain, and in, In a case where the downlink signal does not correspond to the SSB, the downlink signal is not received from the base station on the at least one symbol overlapping in the time domain.

9. A method for operating a terminal in a wireless communication system, the method comprising: identifying, based on system information or higher layer signaling, at least one symbol configured as downlink by uplink-downlink configuration information; determining whether at least one symbol for an uplink signal overlaps in a time domain with the at least one symbol configured as the downlink by the uplink-downlink configuration information; In a case where the at least one symbol for the uplink signal overlaps with the at least one symbol configured as the downlink by the uplink-downlink configuration information in the time domain, determining whether a time or frequency division duplex (XDD) related indicator is received from a base station, the XDD related indicator indicating whether the uplink signal is transmitted on the at least one symbol overlapping in the time domain or not transmitted on the at least one symbol overlapping in the time domain; and transmitting the uplink signal to the base station on the at least one symbol overlapping in the time domain based on receiving the XDD-related indicator from the base station, and wherein, based on not receiving the XDD-related indicator, not sending the uplink signal to the base station on the at least one symbol overlapping in the time domain; and When the at least one symbol used for the uplink signal does not overlap with the at least one symbol configured as the downlink by the uplink-downlink configuration information in the time domain, the uplink signal is sent to the base station on the at least one symbol used for the uplink signal.

10. The operating method according to claim 9, further comprising: determining whether the uplink signal is scheduled by downlink control information (DCI) based on the XDD-related indicator received from the base station; and In a case where it is determined that the uplink signal is scheduled by the DCI, sending the scheduled uplink signal to the base station on the at least one symbol overlapping in the time domain, and in, In a case where the uplink signal is not scheduled by the DCI, the uplink signal is not transmitted to the base station on the at least one overlapping symbol in the time domain.

11. The operating method according to claim 9, further comprising: determining whether the uplink signal corresponds to an uplink data channel based on receiving the XDD-related indicator from the base station; and In a case where it is determined that the uplink signal corresponds to the uplink data channel, transmitting the uplink signal corresponding to the uplink data channel to the base station on the at least one symbol overlapping in the time domain, and in, In a case where the uplink signal does not correspond to the uplink data channel, the uplink signal is not transmitted to the base station on the at least one symbol overlapping in the time domain.

12. The operating method according to claim 9, further comprising: determining, based on receiving the XDD-related indicator from the base station, whether the uplink signal is scheduled based on a coverage-related configuration; and In a case where it is determined that the uplink signal is scheduled based on the coverage-related configuration, transmitting the scheduled uplink signal to the base station on the at least one symbol overlapped in the time domain, and in, In a case where the uplink signal is not scheduled based on the coverage-related configuration, the uplink signal is not transmitted to the base station on the at least one symbol overlapping in the time domain.

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