Apparatus and method for processing random access report on random access configuration and random access processing for supporting specific function in wireless communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a terminal in a wireless communication system disclosed herein comprises the steps of: acquiring a random access configuration parameter regarding a combination of a plurality of functions from a base station; performing a random access procedure using the acquired random access configuration parameters; and transmitting a random access report on the performed random access procedure to the base station, in which the random access report includes random access configuration information on at least one function used when the random access procedure is performed among the plurality of functions.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system, and more specifically, to a process method and device for the following operations: when a terminal receiving services corresponding to various functions (such as network slicing, reduced UE capabilities (REDCAP), small data transmission, and coverage enhancement) performs a random access process, performing random access according to a random access configuration corresponding to each function; and reporting the processing of random access to a network. Background Art

[0002] 5G mobile communication technology defines a wide frequency band to provide higher transmission rates and new services, and can be implemented in "below 6 GHz" frequency bands such as 3.5 GHz, and can also be implemented in "above 6 GHz" frequency bands, which can be referred to as millimeter wave (mmWave) frequency bands including 28 GHz and 39 GHz. In addition, it has been considered to implement 6G mobile communication technology (which can be referred to as a super 5G system) in a terahertz frequency band (e.g., 95 GHz to 3 THz frequency band) in order to achieve a transmission rate fifty times faster than 5G mobile communication technology and an ultra-low latency reduced to one-tenth of 5G mobile communication technology.

[0003] At the beginning of 5G mobile communication technology, in order to support services and meet performance requirements related to enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC) and massive machine-type communication (mMTC), there is ongoing standardization on the following items: beamforming and massive multiple-input multiple-output (MIMO) for mitigating radio wave path loss and increasing radio wave transmission distance in millimeter waves, various parameter sets supporting dynamic operation for efficient utilization of millimeter wave resources and time slot formats (for example, operating multiple subcarrier spacings), initial access technology for supporting multi-beam transmission and broadband, definition and operation of bandwidth parts (BWP), new channel coding methods (such as low-density parity-check (LDPC) codes for large-scale data transmission and polar codes for highly reliable transmission of control information), layer 2 (L2) preprocessing, and network slicing for providing dedicated networks dedicated to specific services.

[0004] Currently, in view of the services to be supported by 5G mobile communication technology, discussions are ongoing on improvements and performance enhancements of initial 5G mobile communication technology, and there is already physical layer standardization on technologies such as: Vehicle-to-Everything (V2X), for assisting driving determination of autonomous vehicles based on information about the location and status of the vehicle sent by the vehicle and for enhancing user convenience; New Radio Unlicensed (NR-U), designed to comply with various regulatory-related requirements for system operation in unlicensed bands; NR UE power saving; Non-Terrestrial Network (NTN), which is UE-satellite direct communication for providing coverage in areas where communication with terrestrial networks is unavailable; and positioning, etc.

[0005] In addition, there is ongoing standardization in the air interface architecture / protocol on technologies such as: Industrial Internet of Things (IIoT) for supporting new services through interworking and convergence with other industries, Integrated Access and Backhaul (IAB) for providing nodes for network service area expansion by supporting wireless backhaul links and access links in an integrated manner, mobility enhancements including conditional switching and dual active protocol stack (DAPS) switching, and two-step random access (2-step RACH for NR) for simplifying the random access procedure, etc., and there is also ongoing standardization on system architecture / services for a 5G baseline architecture (e.g., a service-based architecture or a service-based interface) for combining network function virtualization (NFV) and software defined network (SDN) technologies, and mobile edge computing (MEC) for receiving services based on UE location, etc.

[0006] With the commercialization of such 5G mobile communication systems, an exponentially growing number of connected devices will be connected to the communication network, and enhanced functions and performance of the 5G mobile communication systems and integrated operations of the connected devices will be necessary. To this end, new research related to extended reality (XR) is arranged to effectively support augmented reality (AR), virtual reality (VR), mixed reality (MR), etc., improve 5G performance and reduce complexity by utilizing artificial intelligence (AI) and machine learning (ML), AI service support, meta-service support, and drone communication, etc.

[0007] Furthermore, such development of 5G mobile communication systems will serve as a foundation for developing not only new waveforms for providing coverage in the terahertz band for 6G mobile communication technology, multi-antenna transmission technologies such as full-dimensional MIMO (FD-MIMO), array antennas, and massive antennas, metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional spatial multiplexing technology using orbital angular momentum (OAM), and reconfigurable smart surfaces (RIS), but also full-duplex technology for improving the frequency efficiency of 6G mobile communication technology and improving system networks, AI-based communication technology for achieving system optimization by utilizing satellites and artificial intelligence (AI) from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technology for achieving services at a complexity level that exceeds the limits of UE operating capabilities by utilizing ultra-high performance communication and computing resources.

[0008] On the other hand, network slicing technology, reduced UE capability (REDCAP) technology, small data transmission (SDT) technology and coverage enhancement (CE) technology are introduced in 5G. Each network slice indicates a separate end-to-end network, which is customized to meet various requirements requested by specific applications. REDCAP technology is intended to serve terminals that support lower specifications than typical terminal capabilities, for example, terminals with only one antenna installed. SDT technology is intended to support the function of the terminal to send user services without maintaining the RRC connection mode to the network. CE technology is intended to support the function of the network to expand the coverage of the services it can provide to the terminal. Summary of the invention

[0009] Technical issues

[0010] The present disclosure provides a device and method for a terminal in a wireless communication system to process random access configuration and random access to various function configurations and report on random access. According to various embodiments of the present disclosure, the various functions may include a network slicing function, a REDCAP function, an SDT function, and a CE function.

[0011] Technical Solution

[0012] According to an embodiment of the present disclosure, a method performed by a terminal in a wireless communication system may include: obtaining random access configuration parameters regarding a combination of multiple functions from a base station; using the obtained random access configuration parameters to perform a random access process; and sending a random access report regarding the performed random access process to the base station, wherein the random access report includes random access configuration information regarding at least one function among the multiple functions used when the random access process is performed.

[0013] In addition, according to an embodiment of the present disclosure, a method performed by a base station in a wireless communication system may include: sending random access configuration parameters regarding a combination of multiple functions to a terminal; and receiving a random access report regarding a random access process performed using the random access configuration parameters from the terminal, wherein the random access report may include random access information regarding at least one function among the multiple functions used when the random access process is performed.

[0014] In addition, according to an embodiment of the present disclosure, a terminal in a wireless communication system may include:

[0015] A transceiver configured to send and receive signals; and a controller that controls to: acquire random access configuration parameters regarding a combination of multiple functions from a base station, perform a random access procedure using the acquired random access configuration parameters, and send a random access report regarding the performed random access procedure to the base station, wherein the random access report may include random access configuration information regarding at least one function among the multiple functions used when the random access procedure is performed.

[0016] In addition, according to an embodiment of the present disclosure, a base station in a wireless communication system may include:

[0017] A transceiver configured to send and receive signals; and to send random access configuration parameters regarding a combination of multiple functions to a terminal, and to receive a random access report regarding a random access procedure performed using the random access configuration parameters from the terminal, wherein the random access report may include random access information regarding at least one function used when the random access procedure is performed among the multiple functions.

[0018] Beneficial effects

[0019] According to the present disclosure, based on the random access reports of various functions of the terminal, the network can identify the random access configuration to be applied to the various functions (e.g., usage information about random access preamble resources, random access transmission resources, etc.), and the network can configure or reconfigure the random access configuration (e.g., random access preamble resources, random access transmission resources) to effectively serve the various functions. In this way, the required service can be provided to the terminal without delay, or the system access process performed by the terminal to obtain the required service can be effectively processed.

[0020] Effects obtainable from the present disclosure are not limited to those mentioned above, and other effects not mentioned will be clearly understood from the following description by a person having ordinary knowledge in the technical field to which the present disclosure pertains. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other objects, features and advantages of the present disclosure will become more apparent from the following description on the embodiments of the present disclosure with reference to the accompanying drawings.

[0022] Figure 1 is a diagram illustrating a wireless communication system according to an embodiment of the present disclosure.

[0023] Figure 2 is a diagram illustrating a configuration of a base station in a wireless communication system according to an embodiment of the present disclosure.

[0024] Figure 3 is a diagram illustrating a configuration of a terminal in a wireless communication system according to an embodiment of the present disclosure.

[0025] Figure 4 is a diagram illustrating a configuration of a communication unit in a wireless communication system according to an embodiment of the present disclosure.

[0026] Figure 5 is a diagram illustrating a structure of wireless time-frequency resources of a wireless communication system according to an embodiment of the present disclosure.

[0027] Figure 6 2 is a diagram illustrating a signal flow for performing a random access report for various functions between a terminal and a base station according to an embodiment of the present disclosure.

[0028] Figure 7 2 is a diagram illustrating an operation of a terminal performing a random access report on various functions according to various embodiments of the present disclosure.

[0029] Figure 8 2 is a diagram illustrating the operation of a terminal performing a random access report regarding a network slicing function according to various embodiments of the present disclosure.

[0030] Fig. 9 2 is a diagram illustrating an operation of a base station processing a random access report of a terminal for various functions according to various embodiments of the present disclosure.

[0031] Fig.10 is a diagram illustrating a signal flow for processing support information on a random access report for various functions between a terminal and a base station according to various embodiments of the present disclosure. DETAILED DESCRIPTION

[0032] Hereinafter, the preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In this case, it should be noted that in the accompanying drawings, whenever possible, the same components are represented by the same symbols. In addition, the detailed description of the known functions and configurations that may obscure the gist of the present disclosure will be omitted.

[0033] When describing the embodiments in this specification, descriptions of technical contents that are well known in the technical field to which the present disclosure belongs and are not directly related to the present disclosure will be omitted. This is to convey the gist of the present disclosure more clearly by omitting unnecessary explanations without making it obscure.

[0034] For the same reason, some components are exaggerated, omitted or schematically shown in the drawings. In addition, the size of each component does not fully reflect its actual size. In each of the drawings, the same or corresponding components are assigned the same reference numerals.

[0035] The advantages and features of the present disclosure and the methods for realizing them will become clear with reference to the embodiments described in detail below in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below and can be implemented in many different forms, and the present embodiments are only intended to ensure that the present disclosure is complete and fully convey the scope of the present disclosure defined by the claims to those of ordinary skill in the art to which the present disclosure belongs. Throughout the specification, the same reference numerals indicate the same components.

[0036] At this point, it will be understood that each block of the process flow diagram and the combination of the flow diagram can be performed by computer program instructions. 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, so that the instructions, when executed by the processor of the computer or other programmable data processing device, produce components for performing the functions described in the flow diagram block (or multiple). Since these computer program instructions can be stored in a computer-readable or computer-usable memory, which can point to a computer or other programmable data processing device to implement the function in a specific manner, the instructions stored in the computer-readable or computer-usable memory can produce an article including an instruction component for performing the functions described in the flow diagram block (or multiple). Since the computer program instructions can also be loaded on a computer or other programmable data processing device, a series of operating steps are performed on the computer or other programmable data processing device to produce a computer-executable process, so that the instructions of the executing computer or other programmable data processing device provide steps for performing the functions described in the flow diagram block (or multiple).

[0037] In addition, each box may represent a module, a fragment or a portion of a code including one or more executable instructions for performing a specified logical function (or multiple). In addition, it should be noted that in some alternative examples of execution, the functions mentioned in the box may not occur in order. For example, it is possible to execute two boxes shown in succession substantially simultaneously, or it is possible to execute these boxes in reverse order depending on the corresponding functions.

[0038] In this case, the term "~unit" used in the embodiment indicates software or hardware components such as FPGA or ASIC, and the "~unit" performs certain roles. However, the "~unit" is not limited to software or hardware. The "~unit" can be configured to reside in an addressable storage medium, and can be configured to reproduce one or more processors. Therefore, as an example, the "~unit" indicates components, processes, functions, properties, procedures, subroutines, program code fragments, drivers, firmware, microcodes, circuits, data, databases, data structures, tables, arrays and variables such as software components, object-oriented software components, class components and task components. The functions provided in the components and "~units" can be combined into a smaller number of components and "~units", or can be further divided into additional components and "~units". In addition, components and "~units" can be implemented to regenerate one or more CPUs in a device or a secure multimedia card.

[0039] Although the embodiments of the present disclosure are described with particular reference to the radio access network new RAN (NR) and core network packet core (5G system or 5G core network or NG core: next generation core) of the 5G mobile communication specifications specified by 3GPP (mobile communication specification standardization organization), the main points of the present disclosure can be applied to other communication systems with similar technical backgrounds with minor modifications without substantially departing from the scope of the present disclosure, as would be possible at the discretion of a technician in this field who has technical knowledge in the technical field of the present disclosure.

[0040] In the 5G system, in order to support network automation, a network data collection and analysis function (NWDAF) can be defined, which is a network function that provides the function of analyzing and providing data collected from the 5G network. The NWDAF can collect / store / analyze information from the 5G network and provide the results to an unspecified network function (NF), and the analysis results can be used independently by each NF.

[0041] For the convenience of the following description, some terms and names defined in the 3rd Generation Partnership Project Long Term Evolution (3GPP) specification (specifications for 5G, NR, LTE or similar systems) may be used herein. However, the present disclosure is not limited to such terms and names and may be equally applicable to systems based on other specifications.

[0042] Hereinafter, the present disclosure relates to a device and method for sending a report on a function-specific random access process to a base station in a case where a terminal performs a function-specific random access process in a wireless communication system. In particular, the present disclosure relates to a device and method for performing the following process: a process in which a terminal performs a random access process for slicing, small data transmission, coverage enhancement and / or RedCap functions and sends a status report to a base station when the random access process for the corresponding function is performed; and a process in which the base station performs an operation to adjust and / or readjust the random access configuration for the corresponding function when receiving a status report on the random access process for the corresponding function from the terminal.

[0043] In the following description, for the convenience of explanation, terms indicating signals, terms indicating channels, terms indicating control information, terms indicating network entities, terms indicating components of devices, etc. are used. Therefore, they are not limited to the terms used in the present disclosure, and other terms indicating objects having equivalent technical meanings may be used.

[0044] In the following description, physical channels and signals may be used interchangeably with data or control signals. For example, PDSCH (Physical Downlink Shared Channel) is a term indicating a physical channel through which data is transmitted, but PDSCH can also be used to indicate data. That is, in the present disclosure, the expression "transmitting a physical channel" can be equivalently interpreted as the expression "transmitting data or a signal through a physical channel".

[0045] Hereinafter, in the present disclosure, higher signaling means a signal transmission method in which a base station uses a downlink (DL) data channel of a physical layer to send a signal to a terminal, or a terminal uses an uplink (UL) data channel of a physical layer to send a signal to a base station. Higher signaling can be understood as radio resource control (RRC) signaling or a media access control (MAC) control element (CE).

[0046] In addition, in the present disclosure, the expressions "greater than" or "less than" are used to determine whether a specific condition is satisfied or met, but these are merely descriptions for expressing examples and do not exclude the use of "equal to or greater than" or "equal to or less than." A condition described as "greater than" can be replaced with "equal to or greater than," a condition described as "less than" can be replaced with "equal to or less than," and a condition described as "equal to or greater than and less than" can be replaced with "greater than, equal to, or less than."

[0047] In addition, the present disclosure describes the embodiments using terms used in some communication specifications (eg, the 3rd Generation Partnership Project (3GPP)), but these are merely examples for explanation. The embodiments of the present disclosure can be easily modified and applied to other communication systems.

[0048] Figure 1 is a diagram illustrating a wireless communication system according to an embodiment of the present disclosure.

[0049] Figure 1 Base station 110, terminal 120, and terminal 130 are shown as some nodes using wireless channels in a wireless communication system. Figure 1 Only one base station is shown, but other base stations that are the same as or similar to base station 110 may also be included.

[0050] refer to Figure 1 , the base station 110 is a network infrastructure that provides wireless access to the terminals 120 and 130. The base station 110 has a coverage defined as a certain geographical area based on the distance over which a signal can be transmitted. In addition to "base station", the base station 110 may also be referred to as an "access point (AP)", "eNodeB (eNB)", "5th generation node (5G node)", "next generation node B (gNB)", "radio point", "transmission / reception point (TRP)" or other terms with equivalent technical meanings.

[0051] Each of the terminal 120 and the terminal 130 is a device used by a user, and performs communication with the base station 110 through a wireless channel. A link from the base station 110 to the terminal 120 or the terminal 130 is called a downlink, and a link from the terminal 120 or the terminal 130 to the base station 110 is called an uplink. In some cases, at least one of the terminal 120 and the terminal 130 may be operated without user intervention. That is, at least one of the terminal 120 and the terminal 130 is a device that performs machine type communication (MTC) and may not be carried by the user. In addition to the "terminal", each of the terminal 120 and the terminal 130 may be referred to as a "user equipment (UE)", "mobile station", "subscriber station", "remote terminal", "wireless terminal" or "user equipment" or other terms with equivalent technical meanings.

[0052] The base station 110, the terminal 120, and the terminal 130 can transmit and receive wireless signals in a millimeter wave (mmWave) frequency band (e.g., 28 GHz, 30 GHz, 38 GHz, 60 GHz). In this case, in order to improve the channel gain, the base station 110, the terminal 120, and the terminal 130 can perform beamforming. Here, beamforming may include transmit beamforming and receive beamforming. That is, the base station 110, the terminal 120, and the terminal 130 can give directionality to the transmitted signal or the received signal. To this end, the base station 110 and the terminals 120 and 130 can select the service beams 112, 113, 121, and 131 through a beam search or beam management process. After the service beams 112, 113, 121, and 131 are selected, subsequent communications can be performed via resources that are in a quasi-co-location (QCL) relationship with the resources that transmit the service beams 112, 113, 121, and 131.

[0053] The first antenna port and the second antenna port may be evaluated as being in a QCL relationship when a large-scale characteristic of a channel carrying symbols on a first antenna port can be inferred from a channel carrying symbols on a second antenna port. For example, the large-scale characteristic may include at least one of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial receiver parameters.

[0054] The base station and the terminal are connected through the Uu interface. The uplink refers to the wireless link through which the terminal sends data or control signals to the base station, and the downlink refers to the wireless link through which the base station sends data or control signals to the terminal.

[0055] Figure 2 is a diagram illustrating a configuration of a base station in a wireless communication system according to an embodiment of the present disclosure.

[0056] Figure 2 The illustrated configuration can be understood as the configuration of the base station 110. Terms such as "unit" or "block" used hereinafter indicate a unit that processes at least one function or operation, which may be implemented by hardware, software, or a combination of hardware and software.

[0057] refer to Figure 2 , the base station 110 includes a wireless communication unit 210, a backhaul communication unit 220, a memory 230, and a controller 240. However, the components of the base station are not limited to the above examples. For example, the base station may include more or fewer components than those described above. In addition, the wireless communication unit 210, the backhaul communication unit 220, the memory 230, and the controller 240 may be implemented in the form of a single chip. In addition, the controller 240 may include one or more processors.

[0058] The wireless communication unit 210 performs functions for sending and receiving signals through a wireless channel. For example, the wireless communication unit 210 performs a conversion function between a baseband signal and a bit string according to the physical layer specification of the system. For example, when the wireless communication unit 210 sends data, it generates complex symbols by encoding and modulating the transmitted bit string. In addition, when the wireless communication unit 210 receives data, it restores the received bit string by demodulating and decoding the baseband signal.

[0059] In addition, the wireless communication unit 210 up-converts the baseband signal into a radio frequency (RF) band signal and transmits them through the antenna, and down-converts the RF band signal received through the antenna into a baseband signal. To this end, the wireless communication unit 210 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC), an analog-to-digital converter (ADC), etc. In addition, the wireless communication unit 210 may include multiple transmission and reception paths. In addition, the wireless communication unit 210 may include at least one antenna array consisting of multiple antenna elements.

[0060] In terms of hardware, the wireless communication unit 210 may be composed of a digital unit and an analog unit, and the analog unit may be composed of multiple subunits according to operating power, operating frequency, etc. The digital unit may be implemented with at least one processor (eg, a digital signal processor (DSP)).

[0061] The wireless communication unit 210 transmits and receives signals as described above. Therefore, all or part of the wireless communication unit 210 may be referred to as a "transmitter", "receiver" or "transceiver". In addition, in the following description, transmission and reception performed through a wireless channel are used to include the processing performed by the wireless communication unit 210 as described above.

[0062] The backhaul communication unit 220 provides an interface for communicating with other nodes in the network. That is, the backhaul communication unit 220 converts a bit string sent from the base station 110 to another node (e.g., another access node, another base station, a higher node, a core network, etc.) into a physical signal, and converts a physical signal received from another node into a bit string.

[0063] The memory 230 stores data such as basic programs, applications, and configuration information for the operation of the base station 110. The memory 230 may be composed of a volatile memory, a nonvolatile memory, or a combination of a volatile memory and a nonvolatile memory. In addition, the memory 230 provides stored data according to a request of the controller 240.

[0064] The controller 240 controls the overall operation of the base station 110. For example, the controller 240 sends and receives signals through the wireless communication unit 210 or the backhaul communication unit 220. In addition, the controller 240 records data to the memory 230 / reads data from the memory 230. In addition, the controller 240 is capable of performing the functions of the protocol stack required by the communication specification. According to another embodiment, the protocol stack may be included in the wireless communication unit 210. To this end, the controller 240 may include at least one processor. According to an embodiment, the controller 240 may control the base station 110 to perform operations according to an embodiment described later.

[0065] Figure 3 is a diagram illustrating a configuration of a terminal in a wireless communication system according to an embodiment of the present disclosure.

[0066] Figure 3 The illustrated configuration can be understood as the configuration of the terminal 120. Terms such as "unit" or "block" used hereinafter indicate a unit that processes at least one function or operation, which may be implemented by hardware, software, or a combination of hardware and software.

[0067] refer to Figure 3 , the terminal 120 includes a communication unit 310, a memory 320 and a controller 330. However, the components of the terminal 120 are not limited to the above examples. For example, the terminal 120 may include more or fewer components than those described above. In addition, the communication unit 310, the memory 320 and the controller 330 may be implemented in the form of a single chip. In addition, the controller 330 may include one or more processors.

[0068] The communication unit 310 performs functions for sending and receiving signals through a wireless channel. For example, the communication unit 310 performs a conversion function between a baseband signal and a bit string according to the physical layer specification of the system. For example, when the communication unit 310 sends data, it generates complex symbols by encoding and modulating the transmitted bit string. In addition, when the communication unit 310 receives data, it recovers the received bit string by demodulating and decoding the baseband signal. In addition, the communication unit 310 up-converts the baseband signal into an RF band signal and sends them through an antenna, and down-converts the RF band signal received through the antenna into a baseband signal. For example, the communication unit 310 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, etc.

[0069] In addition, the communication unit 310 may include multiple transmission and reception paths. In addition, the communication unit 310 may include at least one antenna array consisting of multiple antenna elements. In terms of hardware, the communication unit 310 may be composed of digital circuits and analog circuits (e.g., radio frequency integrated circuits (RFIC)). Here, the digital circuits and analog circuits can be implemented in one package. In addition, the communication unit 310 may include multiple RF chains. In addition, the communication unit 310 may perform beamforming.

[0070] The communication unit 310 transmits and receives signals as described above. Therefore, all or part of the communication unit 310 may be referred to as a "transmitter", "receiver" or "transceiver". In addition, in the following description, transmission and reception performed through a wireless channel are used to include the processing performed by the communication unit 310 as described above.

[0071] The memory 320 stores data such as basic programs, applications, and configuration information for the operation of the terminal 120. The memory 320 may be composed of a volatile memory, a nonvolatile memory, or a combination of a volatile memory and a nonvolatile memory. In addition, the memory 320 provides stored data according to a request of the controller 330.

[0072] The controller 330 controls the overall operation of the terminal 120. For example, the controller 330 sends and receives signals through the communication unit 310. In addition, the controller 330 records data to / reads data from the memory 320. In addition, the controller 330 can perform the functions of the protocol stack required by the communication specification. To this end, the controller 330 may include at least one processor or microprocessor, or may be a part of a processor. In addition, the communication unit 310 and a part of the controller 330 may be referred to as a communication processor (CP). According to an embodiment, the controller 330 may control the terminal 120 to perform operations according to the embodiments described later.

[0073] Figure 4 is a diagram illustrating a configuration of a communication unit in a wireless communication system according to an embodiment of the present disclosure.

[0074] Figure 4 Show Figure 2 The wireless communication unit 210 or Figure 3 An example of a detailed configuration of the communication unit 310 is shown. In particular, Figure 4 Shown as Figure 2 The wireless communication unit 210 or Figure 3 A component of a portion of the communication unit 310 for performing beamforming.

[0075] refer to Figure 4, the wireless communication unit 210 or the communication unit 310 includes a coding and modulation unit 402, a digital beamforming unit 404, a plurality of transmission paths 406-1 to 406-N, and an analog beamforming unit 408.

[0076] The coding and modulation unit 402 performs channel coding. For channel coding, at least one of a low density parity check (LDPC) code, a convolutional code, and a polarization code may be used. The coding and modulation unit 402 generates modulation symbols by performing constellation mapping.

[0077] The digital beamforming unit 404 performs beamforming on a digital signal (e.g., a modulation symbol). To this end, the digital beamforming unit 404 multiplies the modulation symbol by a beamforming weight. Here, the beamforming weight is used to change the size and phase of the signal and may be referred to as a "precoding matrix", "precoder", etc. The digital beamforming unit 404 outputs the digital beamformed modulation symbol to a plurality of transmission paths 406-1 to 406-N. At this time, according to a multiple-input multiple-output (MIMO) transmission technology, the modulation symbol may be multiplexed or the same modulation symbol may be provided to a plurality of transmission paths 406-1 to 406-N.

[0078] A plurality of transmission paths 406-1 to 406-N converts the digital signal of digital beamforming into an analog signal. To this end, each of the plurality of transmission paths 406-1 to 406-N may include an inverse fast Fourier transform (IFFT) operation unit, a cyclic prefix (CP) insertion unit, a DAC, and an up-conversion unit. When another physical layer method (e.g., filter bank multi-carrier (FBMC)) is applied, the CP insertion unit for the orthogonal frequency division multiplexing (OFDM) method may be removed. That is, the plurality of transmission paths 406-1 to 406-N provide independent signal processing processes for the plurality of streams generated by digital beamforming. However, depending on the implementation, some components in the plurality of transmission paths 406-1 to 406-N may be used together.

[0079] The analog beamforming unit 408 performs beamforming on the analog signal. To this end, the digital beamforming unit 404 multiplies the analog signal by a beamforming weight. Here, the beamforming weight is used to change the size and phase of the signal. In particular, depending on the connection structure between the multiple transmission paths 406-1 to 406-N and the antenna, the analog beamforming unit 440 can be configured in various ways. For example, each of the multiple transmission paths 406-1 to 406-N can be connected to an antenna array. As another example, the multiple transmission paths 406-1 to 406-N can be connected to an antenna array. As another example, the multiple transmission paths 406-1 to 406-N can be adaptively connected to an antenna array or two or more antenna arrays.

[0080] Figure 5 is a diagram illustrating a structure of wireless time-frequency resources of a wireless communication system according to an embodiment of the present disclosure.

[0081] refer to Figure 5 , in the radio resource region, the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. The minimum transmission unit in the time domain is an OFDM symbol or a DFT-S-OFDM symbol, where N symb OFDM symbols or DFT-S-OFDM symbols 530 are included in one time slot 505. Unlike a time slot, in the NR system, the length of a subframe may be defined as 1.0 ms, and the length of a radio frame 500 may be defined as 10 ms. The minimum transmission unit in the frequency domain is a subcarrier, and the bandwidth of the entire system transmission band may include a total of N BW subcarriers 525. Depending on the system, N symb and N BW a specific value.

[0082] The basic unit of the time-frequency resource region is a resource element (RE) 510, which can be represented as an OFDM symbol index or a DFT-S-OFDM symbol index and a subcarrier index. A resource block (RB) 515 can be defined as N in the frequency domain. RB 520 consecutive subcarriers. Generally, the minimum transmission unit of data is an RB unit, and in an NR system, usually N symb =14, and N RB =12.

[0083] like Figure 5 The structure of the wireless time-frequency resources shown can be applied to the Uu interface.

[0084] In the present disclosure, the base station may provide the terminal with random access configuration information that the terminal can use during the random access process. The random access configuration information may include at least one or a combination of a random access preamble, a random access time and / or frequency resources, a random access resource partition (RA partition), or a random access priority sorting parameter. For the random access preamble, the random access time and / or frequency resources, and the random access resource partition, the random access parameters used in the two-step (msgA, msgB sending and receiving process) random access process and / or the random access parameters used in the four-step random access process may be included. The random access priority sorting parameters may include a scaling factor BI parameter or a power ramping step size parameter. The base station is able to provide the terminal with random access configuration information applicable to each function (slice, small data transmission, coverage enhancement, RedCap). For example, the base station may send the following information in [Table 1] to indicate to the terminal which functions it provides random access configuration information for. At the same time, the present disclosure is not limited to the following [Table 1], and the information in [Table 1] may be indicated by other names.

[0085] [Table 1]

[0086]

[0087] Referring to [Table 1], when {true} is set for each function, it can indicate that the random access configuration information is applied to the corresponding function. Slice group list information (Slice Group List) is a parameter defined for the purpose of indicating whether the slice function is supported. In the presence of slice group list information, it can indicate that the random access configuration information is applied to the slice corresponding to each slice group identifier (slice group ID). When the base station configures the information in [Table 1] for the terminal, the information can be provided in combination with at least one of the random access preamble, random access time / frequency resources, and random access resource partitions or a combination thereof. Here, the random access preamble, random access time / frequency resources, and random access resource partitions may correspond to the random access parameters used in the 2-step (msgA, msgB sending and receiving process) random access process and / or the random access parameters used in the 4-step random access process. When the base station configures the information in [Table 1] for the terminal, the information can be provided in combination with the random access priority sorting parameters (scaling factor BI and / or power increase step size). For example, when there is a slice group list, the random access priority sorting parameters can be configured for one or more slice groups.

[0088] For example, information from the base station including random access configuration information about each function is shown in the following [Table 2]. In [Table 2], AdditionalRACH-ConfigCommon is a random access configuration parameter configured for one or more functions, and the configuration parameter can be used when the terminal performs a random access procedure for one or more functions. Meanwhile, the present disclosure is not limited to the following [Table 2], and the information in [Table 2] can be indicated by other names.

[0089] [Table 2]

[0090]

[0091]

[0092] Referring to [Table 2], the parameter BWP-UplinkCommon may include random access configuration information provided for use by the terminal in a conventional general random access procedure. When random access configuration information is provided for each function, the random access configuration information may be provided by the parameter AdditionalRACH-ConfigCommon. When performing a random access procedure for a coverage enhancement function, a RedCap function, a small data transmission function, and / or a slice group list, i.e., a slice function, the parameter AdditionalRACH-ConfigCommon may be applied, which is set to {true} in [Table 1]. The parameter Rach-ConfigCommon may provide parameters applicable when performing a 4-step random access procedure, and the parameter msgA-ConfigCommon may provide parameters applicable when performing a 2-step random access procedure.

[0093] [Table 3] and [Table 4] are examples of random access configuration parameters applicable when a 4-step random access procedure is performed and random access configuration parameters applicable when a 2-step random access procedure is performed, respectively. Meanwhile, the present disclosure is not limited to the following [Table 3] and [Table 4], and the information in [Table 3] and [Table 4] may be indicated by other names.

[0094] [Table 3]

[0095]

[0096]

[0097] [Table 4]

[0098]

[0099] [Table 5] is an example of random access preamble parameters configured for use by a terminal when performing a function-specific random access procedure. Meanwhile, the present disclosure is not limited to the following [Table 5], and the information in [Table 5] may be indicated by other names.

[0100] [Table 5]

[0101]

[0102]

[0103] In the following, reference Figures 6 to 10 , the operation of the terminal and the base station processing the report of the terminal for random access to one or more functions will be described. The random access procedure for one or more functions may be performed using the random access configuration parameters including the information in [Table 1] to [Table 5] configured to the terminal for one or more functions. When the terminal performs the random access procedure using the random access configuration parameters including the information in [Table 1] to [Table 5] configured for one or more functions, the terminal may store the random access configuration parameter information about the one or more functions used when the random access procedure is successful for the one or more functions. In the case where the terminal is configured to report the random access configuration parameters used when the random access procedure is successful for the one or more functions, it may send a random access report including the corresponding random access configuration parameters to the base station. When the terminal performs the random access procedure using the random access configuration parameters including the information in [Table 1] to [Table 5] configured for the one or more functions, the terminal may store the random access configuration parameter information of the one or more functions used when the random access procedure fails for the one or more functions. In the case where the terminal is configured to report the random access configuration parameters used when the random access procedure fails for the one or more functions, it may send a random access report including the corresponding random access configuration parameters to the base station. In addition, since the terminal may have used a 2-step random access procedure or may have used a 4-step random access procedure, the terminal may report the random access configuration parameters corresponding to the 2-step random access procedure or the 4-step random access procedure used by it. The random access configuration parameters for one or more functions may be configured as public information shared and used by all terminals and used in a contention-based random access procedure, or may be configured as dedicated information used only by a specific terminal and used in a contention-free random access procedure. The terminal may send a random access report to the base station regarding the situation of a contention-based random access procedure performed by it for one or more functions, and may send a random access report to the base station regarding the situation of a contention-free (non-contention) random access procedure performed by it for one or more functions.

[0104] Figure 62 is a diagram illustrating a signal flow for performing a random access report on a function between a terminal and a base station according to an embodiment of the present disclosure.

[0105] refer to Figure 6 In step 601, the terminal 600 may obtain random access configuration parameters from the base station 650 that may be used to perform a general random access procedure.

[0106] In step 603, the terminal 600 may perform a random access procedure using the random access configuration parameters of step 601, and may send a random access report including the random access configuration parameters used when the random access procedure is performed to the base station 650. In the case of the random access report performed by the terminal 600 in step 603, the terminal 600 may be configured to perform the random access report by including the random access configuration parameters used when the random access procedure is successfully performed, or the terminal 600 may be configured to perform the random access report by including the random access configuration parameters used when the random access procedure of the terminal 600 fails.

[0107] The event in which the terminal 600 performs the random access procedure may include, for example, at least one of the following: accessing the system after cell selection / reselection, determining that beam use has failed because the beam used by the terminal for data transmission and reception with the base station is not suitable and recovering the beam, the terminal performing a handover (normal handover, conditional handover, etc.) from the serving cell to the target cell, the terminal performing secondary cell group configuration, the terminal synchronizing the uplink to the base station, the terminal requesting uplink resources from the base station, the terminal requesting system information from the base station, or any combination thereof. Meanwhile, the present disclosure is not limited thereto.

[0108] For each event, the terminal may store the random access configuration parameters used in the random access process of the terminal. This information may correspond to the information to be included when the terminal performs a random access report, and the information may be stored in the terminal for a certain time, and the terminal may be configured to delete it if it is not used within the time.

[0109] The random access report sent from the terminal 600 to the base station 650 may include information indicating which event the terminal 600 is reporting about the performed random access procedure (e.g., RA purpose parameter). As an example, the random access report sent from the terminal 600 to the base station 650 may include [Table 6]. Meanwhile, the present disclosure is not limited to the following [Table 6], and the information in [Table 6] may be indicated by other names.

[0110] [Table 6]

[0111]

[0112] In step 605, the terminal 600 may obtain random access configuration parameters applicable to one or more functions from the base station 650. When performing a random access procedure for one or more functions configured to be used, the terminal 600 may use the random access configuration parameters obtained in step 605 to perform the random access procedure.

[0113] In step 607, the terminal 600 may transmit a random access report of a random access procedure for one or more functions performed by the terminal 600 to the base station 650. The random access report transmitted by the terminal 600 to the base station 650 may include at least one or a combination of information about the one or more functions performed by the terminal 600 and information about random access configuration parameters applied to the corresponding functions. In the case where step 607 is a random access report for one or more functions performed by the terminal 600, the terminal 600 may be configured to perform the random access report by including the random access configuration parameters used when the random access procedure is successfully performed by the terminal 600, or the terminal 600 may be configured to perform the random access report by including the random access configuration parameters used when the random access procedure of the terminal 600 fails.

[0114] The event in which the terminal 600 performs a random access procedure for one or more functions may include, for example, at least one of the following: accessing the system after cell selection / reselection, determining that beam use has failed because the beam used by the terminal for data transmission and reception with the base station is not suitable and recovering the beam, the terminal performing a handover (normal handover, conditional handover, etc.) from the serving cell to the target cell, the terminal performing secondary cell group configuration, the terminal synchronizing the uplink to the base station, the terminal requesting uplink resources from the base station, the terminal requesting system information from the base station, or any combination thereof. Meanwhile, the present disclosure is not limited thereto.

[0115] For each event, the terminal may store the random access configuration parameters used in the random access process of the terminal. This information may correspond to the information to be included when the terminal performs a random access report, and the information may be stored in the terminal for a certain time, and the terminal may be configured to delete it if it is not used within the time.

[0116] The random access report sent from the terminal 600 to the base station 650 may include information indicating which event the terminal 600 is reporting about the performed random access procedure (e.g., RA purpose parameter). The random access report sent from the terminal 600 to the base station 650 in step 607 may include [Table 7] as an example. Meanwhile, the present disclosure is not limited to the following [Table 7], and the information in [Table 7] may be indicated by other names.

[0117] [Table 7]

[0118]

[0119] When the base station 650 configures the random access configuration parameters used when the terminal 600 performs a random access procedure for one or more functions, the base station 650 may configure individual random access configuration parameters for the one or more functions, or may also configure general random access configuration parameters to be applied to the one or more functions. The terminal 600 may perform a random access procedure using the random access configuration parameters configured by the base station 650 for the one or more functions (configured individually for a specific function or configured generally), and may include the random access configuration parameters for the one or more functions in the random access report when sending the random access report to the base station 650 (configured individually for a specific function or configured generally). That is, the random access configuration parameters included in the random access report in [Table 7] are random access configuration parameters configured individually for a specific function or random access configuration parameters configured for general use.

[0120] Meanwhile, when the terminal 600 transmits a random access report for one or more functions to the base station 650, a terminal operation of processing information on the one or more functions included in the random access report is explained in the following embodiment.

[0121] (1) The terminal can perform a random access procedure to access the system to support small data transmission, RedCap and coverage enhancement functions, and receive services for these functions. In the case where the terminal determines that the random access configuration parameters applicable to one or more functions configured by the base station support the combination of small data transmission and RedCap, the terminal can use the corresponding random access configuration parameters to perform the random access procedure. Here, it is assumed that the random access configuration parameters that can support the combination of small data transmission, RedCap and coverage enhancement intended by the terminal are not configured. The terminal can send a random access report to the base station by including information about the combination of the intended functions when performing the random access procedure, that is, small data transmission, RedCap and coverage enhancement (applicable feature information) and information about the combination of the functions configured in the random access configuration parameters used when performing the actual random access procedure, in this case, small data transmission and RedCap.

[0122] (2) The terminal can perform a random access procedure to access the system to support small data transmission, RedCap and coverage enhancement functions, and receive services for these functions. In the case where the terminal determines that the random access configuration parameters applicable to one or more functions configured by the base station support a combination of small data transmission, RedCap and coverage enhancement, the terminal can use the corresponding random access configuration parameters to perform the random access procedure. Here, it is assumed that random access configuration parameters that can support the combination of small data transmission, RedCap and coverage enhancement intended by the terminal are configured. The terminal can send a random access report to the base station by including information about the combination of functions intended when performing the random access procedure (i.e., small data transmission, RedCap and coverage enhancement (applicable feature information)) and information about the combination of functions configured in the random access configuration parameters used when performing the actual random access procedure (in this case, small data transmission, RedCap and coverage enhancement).

[0123] (3) As another embodiment of (2), since all combinations of functions intended by the terminal are supported in the random access configuration parameters configured by the base station, the terminal can omit information about the combination of functions intended by the terminal (applicable feature information) and can configure and send a random access report to the base station by including information about the combination of functions configured in the random access configuration parameters used when performing the actual random access process.

[0124] The case in which the terminal 600 can perform a random access report for one or more functions may include the example in the following [Table 8]. The terminal 600 may perform a random access report for one or more functions for one or a combination of the scenarios included in [Table 8]. Meanwhile, the present disclosure is not limited to the following [Table 8].

[0125] [Table 8]

[0126]

[0127] In one embodiment, the information configured by the terminal 600 when the terminal 600 performs a random access report to the base station 650 for one or more functions may include the example in [Table 9]. [Table 9] is an example of including a random access report in a connection establishment failure report of the terminal. However, the present disclosure is not limited to the following [Table 9], and the information in [Table 9] may be indicated by other names.

[0128] [Table 9]

[0129]

[0130] In the example of [Table 9], when a terminal experiencing a connection establishment failure performs a random access procedure using random access configuration parameters for one or more functions while reporting the connection establishment failure to the base station, the terminal may report to the base station information about a combination of one or more functions used by the terminal and at least one or a combination of random access configuration parameters used by the terminal for the combination of one or more functions. [Table 9] is an embodiment in which a random access report for a combination of one or more functions is included in a parameter PerRASSBInfo or a parameter perrInfoList. Although not shown in [Table 9], a parameter corresponding to a random access report for a combination of one or more functions may be configured to be included in ConnEstFailReport as a separate parameter.

[0131] As another embodiment, in the case where the terminal reports the secondary cell group failure information to the base station, if the terminal has performed a random access procedure on a cell of the secondary cell group using random access configuration parameters for one or more functions, the terminal may include a random access report on one or more functions in a random access report on the secondary cell group failure information. [Table 10] is an example of configuration information on the secondary cell group failure information report when the secondary cell group failure information report includes a random access report on one or more functions. Meanwhile, the present disclosure is not limited to the following [Table 10], and the information in [Table 10] may be indicated by other names.

[0132] [Table 10]

[0133]

[0134] When the terminal uses the secondary cell group failure information in [Table 10] to perform a random access report on a random access procedure performed for one or more functions, the terminal may set the failureType to randomAccessProblem. As another embodiment, a separate failureType (e.g., a feature combination RA problem) that can indicate a randomAccessProblem for one or more functions may be defined, and the terminal may include the new failureType when performing a random access report on a random access procedure performed for one or more functions. In addition, when configuring a random access report for one or more functions, the terminal may include random access configuration parameter information used in the random access procedure for one or more functions in the parameter PerRAInfoList. Here, the parameter PerRAInfoList may include a parameter that notifies combined information about one or more functions, such as the parameter PerRAInfoList in [Table 9].

[0135] As another embodiment, when the terminal experiences a radio link failure (RLF) and sends a report on the radio link failure (RLF) to the base station, the terminal may include information that it has performed a random access procedure. When the terminal has performed a random access procedure for one or more functions and sends a random access report thereon to the base station, the terminal may use the format shown in the following [Table 11]. Meanwhile, the present disclosure is not limited to the following [Table 11], and the information in [Table 11] may be indicated by other names.

[0136] [Table 11]

[0137]

[0138] The parameter RA-InformationCommon in [Table 11] may include a parameter notifying combined information about one or more functions, such as the parameter PerRAInfoList in [Table 9].

[0139] As another embodiment, when the terminal sends a successful handover report to the base station, the terminal may include information about the random access procedure that it has performed. When the terminal has performed a random access procedure for one or more functions and sends a random access report thereon to the base station, the terminal may use the format shown in [Table 12] below. Meanwhile, the present disclosure is not limited to [Table 12] below, and the information in [Table 12] may be indicated by other names.

[0140] [Table 12]

[0141]

[0142] The parameter RA-InformationCommon in [Table 12] may include a parameter notifying combined information about one or more functions, such as the parameter PerRAInfoList in [Table 9].

[0143] In the following, reference will be made to Figure 7 The operation of a terminal performing a random access procedure for one or more functions and transmitting a report on random access to a base station according to the embodiments of [Table 1] to [Table 12] is described.

[0144] Figure 7 2 is a diagram illustrating an operation of a terminal performing a random access report on various functions according to various embodiments of the present disclosure.

[0145] refer to Figure 7, the terminal may perform a random access procedure for one or more functions, and when the terminal determines that the random access configuration parameter is configured for one or more functions, the terminal may perform a random access procedure for a combination of intended functions (one or more functions). The terminal may store the random access configuration parameter used when the random access procedure is performed for the combination of intended functions (one or more functions). When the terminal determines that an event for which a random access report is performed has occurred (e.g., [Table 8]), the terminal may identify the random access configuration parameter applied when performing a random access procedure for the combination of intended functions (one or more functions) in step 701.

[0146] In step 703, the terminal may identify whether the random access configuration parameter identified in step 701 has been applied to all functions belonging to a combination of functions (one or more functions) intended by the terminal.

[0147] When the terminal determines at step 705 that all functions belonging to the combination of intended functions (one or more functions) are applicable, the terminal may send a random access report to the base station at step 707, including information about random access configuration parameters that the terminal applies to the combination of all functions (one or more functions) intended by the terminal. As an example, the random access report of step 707 may be configured to include information about the combination of functions (applicable features) and information about the combination of functions configured in the random access configuration parameters used when the random access procedure is performed. As another example, the random access report of step 707 may be configured to omit information about the combination of functions (applicable features) and include information about the functions configured in the random access configuration parameters used when the random access procedure is performed.

[0148] When the terminal determines in step 705 that the selected random access configuration parameter cannot be applied to all functions belonging to the combination of intended functions (one or more functions), the terminal may send a random access report to the base station in step 709, including information about the random access configuration parameters that the terminal has applied to the combination of functions (one or more functions) intended by the terminal. As an example, the information in the random access report of step 709 may be configured to include information about the combination of functions (applicable features) and information about the combination of functions configured in the random access configuration parameters used when performing the actual random access procedure.

[0149] When priority is configured for one or more functions in the random access configuration parameters configured by the base station, the terminal may include priority information configured for the corresponding functions when performing a random access procedure for the one or more functions in the random access report. The priority configuration for one or more functions in the random access configuration parameters may include the examples in the following [Table 13]. Meanwhile, the present disclosure is not limited to the following [Table 13], and the information in [Table 13] may be indicated by other names.

[0150] [Table 13]

[0151]

[0152] When acquiring information about the random access report from the terminal in steps 707 to 709, the base station can know information about the combination of functions (one or more functions) intended by the terminal accessing its cell and information about the combination of functions (one or more functions) corresponding to the random access configuration parameters available to the terminal when the terminal accesses the cell. The base station can use this information to configure and provide the terminal with random access configuration parameters for a combination of functions that were not previously provided to the terminal but intended by the terminal. Alternatively, the base station can use this information to adjust (e.g., delete or modify) random access configuration parameters for a combination of functions that were previously provided to the terminal but not used and provide them to the terminal. Alternatively, the base station can use this information to adjust (e.g., modify) random access configuration parameters for a combination of functions that were previously provided to the terminal and provide them to the terminal.

[0153] Meanwhile, in the case of a slice function among one or more functions, the base station may group one or more slices into slice groups and operate the random access configuration parameters of each slice group. For example, slice group 1 may consist of {slice A, slice B}, and slice group 2 may consist of {slice B}. The base station is capable of configuring random access configuration parameters for slice group 1 and slice group 2, and may configure each slice group to use general random access configuration parameters or function-specific random access configuration parameters. When performing a random access procedure for a slice function, the terminal may perform the random access procedure by selecting the random access configuration parameters configured for the slice group to which the slice intended by the terminal belongs. In the case where the terminal determines that a random access report is configured for one or more functions and the one or more functions include slices, the terminal may store the random access configuration parameters used when the random access procedure is performed for the slice group, and when a random access report event has occurred (e.g., [Table 8]), a random access report including slice group information and random access configuration parameters for the slice group may be sent to the base station. Next, reference will be made to Figure 8 Describes the operation of the terminal performing random access reporting for slicing functions.

[0154] Figure 8 2 is a diagram illustrating the operation of a terminal performing a random access report for a network slicing function according to various embodiments of the present disclosure.

[0155] exist Figure 8 In the example, it is represented as a slice, but it can be applied to both the case where the random access configuration parameters are operated on a slice basis and the case where the random access configuration parameters are operated on a slice group basis.

[0156] refer to Figure 8 , the terminal may be configured with random access configuration parameters that can be used when the terminal is configured to perform a slice function and perform a random access procedure for the slice function. The random access configuration parameters (RACH configuration) can be configured for one or more slices. The terminal can perform a random access procedure using the random access configuration parameters configured for the intended slice (or slice group). The terminal may store the random access configuration parameters for the intended slice. When the terminal performs a random access procedure using the random access configuration parameters for the intended slice, the terminal may be configured to include the intended slice information in the random access report. When the terminal determines that an event for performing a random access report on it has occurred (e.g., [Table 8]), the terminal may identify information about the random access configuration parameters selected when performing random access at step 801. In step 803, the terminal may identify whether the selected random access configuration parameters are configured to be used in the intended slice. In the case where the terminal determines in step 805 that the selected random access configuration parameters have been used in the intended slice, the terminal may configure the random access report information to include the intended slice information and the used random access configuration parameters, and send it to the base station in step 807. In the case where the terminal determines in step 805 that the selected random access configuration parameter has not been used in the intended slice, the terminal may configure the random access report information in step 809 to include the used random access configuration parameter and send it to the base station.

[0157] For example, when the terminal performs a random access report for a slice, the random access report configured by the terminal may include an example of [Table 14] or [Table 15]. The random access report from the terminal may include featureCombinationForRA indicating a combination of one or more functions, and sliceGroup information indicating a slice (or slice group) when the slice function is used. At the same time, the present disclosure is not limited to the following [Table 14] and [Table 15], and the information in [Table 14] and [Table 15] may be indicated by other names.

[0158] [Table 14]

[0159]

[0160] [Table 15]

[0161]

[0162] Once the base station obtains the random access report of the terminal, the base station can identify the slice information intended by the terminal attempting to access its cell, and can identify the random access configuration parameter information applied to the slice by the terminal. In the case where the base station has configured the random access configuration parameters for the slice intended by the terminal, the base station can adjust (e.g., modify) the random access configuration parameters for the slice based on the random access report from the terminal. In the case where the base station has configured the random access configuration parameters for the slice not used by the terminal, the base station can adjust (e.g., modify or delete) the random access configuration parameters for the slice based on the random access report from the terminal. In the case where the base station has not yet configured the random access configuration parameters for the slice intended by the terminal, the base station can adjust (e.g., newly configure) the random access configuration parameters for the slice based on the random access report from the terminal.

[0163] As reference Figure 8 and Fig. 9 As described, the random access report information from the terminal can be used for RACH optimization of the base station and the network. For another example, the random access report information from the terminal may include at least one of the following: information indicating whether a conflict occurs in each random access attempt, information about the SSB on which the terminal attempts random access in chronological order and the number of random access preambles sent by the terminal on the SSB, or information indicating whether the SSB on which the terminal attempts random access exceeds or falls below the rsrp-ThresholdSSB threshold for each random access attempt. The terminal can report the above information to the base station even when the random access procedure is performed for one or more functions. Based on the random access report information from the terminal, the base station configures the terminal with random access configuration parameters for one or more functions by adjusting parameters, such as the random access preamble configuration to be configured for one or more functions, the random access preamble transmission resources (frequency / time resources) to be configured for one or more functions, the SSB configuration on which random access can be attempted for one or more functions, and the rsrp-ThresholdSSB threshold of the SSB on which random access is attempted for one or more functions. In the following, reference is made to Fig. 9 , the operation of a base station processing a random access report performed by a terminal for one or more functions will be described.

[0164] Fig. 9 is a diagram illustrating an operation of a base station processing a random access report of a terminal for various functions according to various embodiments of the present disclosure.

[0165] refer to Fig. 9, the base station may obtain a random access report from the terminal in step 901, and the random access report may include information about one or more functions to which the terminal applies a random access procedure.

[0166] In step 903, the base station may acquire random access configuration parameter (RACH configuration) information included in the random access report from the terminal. The information that the base station may acquire through the random access report from the terminal in steps 901 to 903 may include at least one of the random access configuration parameters (RACH configuration) used in one or more functions, for example, a random access partition (RA partition) or a use state of a random access preamble. The base station may configure and reconfigure information about one or more functions to be provided to the terminal and random access configuration parameters for one or more functions based on the information about one or more functions acquired through the random access report from the terminal in steps 901 to 903 and the random access configuration parameter information applied to the one or more functions.

[0167] In step 905, the base station may process allocation adjustment of random access configuration parameters (RACH configuration) (e.g., random access partitions (RA partitions)) to be used for a combination of one or more functions, and allocation adjustment for random access preambles. The base station may provide the terminal with information about one or more functions configured and reconfigured, and random access configuration parameters to be used in a random access procedure for the one or more functions.

[0168] At the same time, when the terminal is configured by the base station as to whether the terminal can perform a random access report for one or more functions and can perform a random access report for one or more functions, when a random access report event has occurred, the random access report event can be performed according to Figures 6 to 9 Operation of a terminal and a base station for performing a random access report for one or more functions of an embodiment of the present invention. Fig.10 , an example of configuring whether a terminal is able to perform random access reporting for one or more functions will be described.

[0169] Fig.10 is a diagram illustrating a signal flow for processing support information on a random access report for various functions between a terminal and a base station according to various embodiments of the present disclosure.

[0170] refer to Fig.10, the terminal 1000 may send information for notifying that a random access report is available for a random access procedure performed using random access configuration parameters (additional RACH configuration) for one or more functions to the base station 1050 at step 1001. The information (RA report availability) for notifying that a random access report is available sent by the terminal at step 1001 may include a combination of one or more functions (features or feature lists) for which the terminal performs a random access procedure. The information (RA report availability) for notifying that a random access report is available for one or more functions at step 1001 may be included in an RRC message (e.g., at least one or a combination of an RRCSetupComplete message, an RRCResumeComplete message, and an RRCReconfigurationComplete message).

[0171] In step 1003, the base station 1050 may process (or identify) information (RA report availability) for notifying the random access report availability for one or more functions of the terminal 1000, and may instruct the terminal 1000 to send a random access report. In step 1003, the base station 1050 may select and indicate one or more functions that the terminal 1000 can report. When it is determined that the terminal 1000 has performed a random access procedure for one or more functions, and is instructed to perform a random access report when it has performed a random access procedure using random access configuration parameters for one or more functions as indicated in step 1003.

[0172] In step 1005, the terminal 1000 may send a random access report to the base station 1050, where the random access report includes random access configuration parameters used in the random access process performed for one or more functions. In step 1005, the terminal 1000 may configure and send a random access report for one or more functions indicated by the base station 1050 in step 1003.

[0173] At the same time, as an embodiment of the present disclosure, the base station can send a message requesting a random access report for one or more functions to the terminal, and the terminal can send a random access report to the base station based on the request information for the random access report for one or more functions from the base station.

[0174] As an example of a message requesting a random access report for one or more functions, the base station may send a UEInformationRequest message to the terminal. When obtaining a message requesting a random access report for one or more functions from the base station, the terminal may perform the operations shown in [Table 16]. Meanwhile, the present disclosure is not limited to the following [Table 16].

[0175] [Table 16]

[0176]

[0177]

[0178] Although not shown in [Table 16], the base station may request the terminal to send a random access report for one or more functions associated with the RLF report, and in this case, the terminal may configure the RLF-Report including the random access report for one or more functions associated with the RLF-Report. The base station may request the terminal to send a random access report for one or more functions associated with the SuccessHO-Report, and in this case, the terminal may configure the SuccessHO-Report including the random access report for one or more functions associated with the SuccessHO-Report.

[0179] The random access report message for one or more functions sent by the terminal in response to the random access report request for one or more functions from the base station as in the example of [Table 16] may include, for example, a UEInformationResponse message. The report message including random access report information about one or more functions of the terminal may include an example of [Table 17]. Meanwhile, the present disclosure is not limited to the following [Table 17], and the information in [Table 17] may be indicated by other names.

[0180] [Table 17]

[0181]

[0182] The methods according to the embodiments described in the claims or specification of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

[0183] When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. One or more programs stored in the computer-readable storage medium are configured to be executed by one or more processors in an electronic device. One or more programs include instructions that cause the electronic device to perform the method according to the embodiments described in the claims or description of the present disclosure.

[0184] These programs (software modules, software) may be stored in random access memory, nonvolatile memory including flash memory, read-only memory (ROM) and electrically erasable programmable ROM (EEPROM: electrically erasable programmable read-only memory), magnetic disk storage, compact disk-ROM (CD-ROM), digital versatile disk (DVD) or other types of optical storage devices or tape cassettes. Alternatively, these programs may be stored in a memory constituted by a combination of some or all of these. In addition, the constituted memory may be included in plural.

[0185] In addition, the program can be stored in an attachable storage device accessible via a communication network, such as the Internet, an intranet, a local area network (LAN), a wide LAN (WLAN), or a storage area network (SAN), or a combination thereof. The storage device can access the device executing the embodiments of the present disclosure via an external port. In addition, a separate storage device on the communication network can access the device executing the embodiments of the present disclosure.

[0186] In the specific embodiments of the present disclosure described above, the components included in the present disclosure are expressed in singular or plural form, depending on the specific embodiment presented. However, for ease of explanation, singular or plural expression is appropriately selected for the presented situation, and the present disclosure is not limited to singular or plural components, and even if the components are expressed in plural form, they can also be composed in singular form, or even if the components are expressed in singular form, they can also be composed in plural form.

[0187] Meanwhile, specific embodiments have been described in the detailed description of the present disclosure, but of course, various modifications may be made without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure should not be limited to the described embodiments, but should be determined not only by the scope of the claims described later, but also by the equivalents of the scope of the claims.

Claims

1. A method performed by a terminal in a wireless communication system, the method comprising: Acquire random access configuration parameters related to a combination of multiple functions from a base station; Performing a random access procedure using the acquired random access configuration parameters; as well as sending a random access report on the performed random access procedure to the base station, The random access report includes random access configuration information about at least one function among a plurality of functions used when the random access procedure is performed.

2. The method according to claim 1, wherein: Performing a random access procedure using the acquired random access configuration parameters includes: performing a random access procedure for a function intended by the terminal among a plurality of functions, The sending of the random access report to the base station includes: when performing a random access procedure, identifying whether the acquired random access configuration parameters are parameters regarding all functions intended by the terminal; and sending a random access report to a base station based on the information about the identified random access configuration parameters, wherein, when the acquired random access configuration parameters are not parameters about all functions intended by the terminal, the random access report sent based on the information about the identified random access configuration parameters includes random access configuration information about the functions intended by the terminal and random access configuration information about the functions actually used when the terminal performs the random access procedure, and In which, when the acquired random access configuration parameters are parameters about all functions intended by the terminal, the random access report sent based on the information about the identified random access configuration parameters includes random access configuration information about the functions actually used when the terminal performs the random access process, and the random access configuration information about the functions intended by the terminal is included or omitted.

3. The method according to claim 1, wherein: When the multiple functions include a slicing function, sending a random access report to the base station includes: A random access report is sent to the base station, which also includes slice group information and random access configuration information about the slice group.

4. The method according to claim 1, wherein: Sending a random access report to a base station includes: Sending a notification report to the base station that a random access report on a combination of multiple functions is possible; receiving, from a base station, an instruction to send a random access report regarding random access configuration information, the random access configuration information being regarding at least one function among a plurality of functions; and A random access report is sent to a base station, the random access report including random access configuration information about at least one function among the plurality of functions for which the sent indication is received.

5. A method performed by a base station in a wireless communication system, the method comprising: Sending random access configuration parameters related to a combination of multiple functions to a terminal; as well as receiving, from a terminal, a random access report regarding a random access procedure performed using random access configuration parameters, The random access report includes random access information about at least one function among a plurality of functions used when the random access procedure is performed.

6. The method according to claim 5, wherein: The random access procedure is a random access procedure for a function desired by the terminal among multiple functions. Wherein, when the random access configuration parameter is not a parameter about all functions intended by the terminal, the random access report includes random access configuration information about the function intended by the terminal and random access configuration information about the function actually used when the terminal performs the random access procedure, and Among them, when the random access configuration parameters are parameters about all functions intended by the terminal, the random access report includes random access configuration information about the functions actually used when the terminal performs the random access process, and the random access configuration information about the functions intended by the terminal is included or omitted.

7. The method according to claim 5, wherein: When the multiple functions include a slicing function, receiving a random access report from the terminal includes: A random access report is received from the terminal, which also includes slice group information and random access configuration parameters about the slice group.

8. The method according to claim 5, wherein: Receiving a random access report from a terminal includes: receiving information from a terminal notifying that a random access report on a combination of a plurality of functions is possible; instructing a terminal to send a random access report regarding random access configuration information, the random access configuration information being regarding at least one function among a plurality of functions; and A random access report is received from a terminal, the random access report including random access configuration information about at least one function instructed to be transmitted among a plurality of functions.

9. A terminal in a wireless communication system, the terminal comprising: a transceiver configured to transmit and receive signals; as well as A controller controls to: Acquire random access configuration parameters regarding a combination of multiple functions from a base station, perform a random access procedure using the acquired random access configuration parameters, and send a random access report regarding the performed random access procedure to the base station, wherein the random access report includes random access configuration information regarding at least one function among the multiple functions used when the random access procedure is performed.

10. The terminal according to claim 9, wherein: The controller controls to: performing a random access procedure using the acquired random access configuration parameter, performing a random access procedure for a function intended by the terminal among a plurality of functions, identifying whether the acquired random access configuration parameter is a parameter for all functions intended by the terminal when performing the random access procedure, and sending a random access report to a base station based on information about the identified random access configuration parameter, and wherein, when the acquired random access configuration parameters are not parameters about all functions intended by the terminal, the random access report sent based on the information about the identified random access configuration parameters includes random access configuration information about the functions intended by the terminal and random access configuration information about the functions actually used when the terminal performs the random access procedure, and Wherein, when the acquired random access configuration parameters are parameters about all functions intended by the terminal, the random access report includes random access configuration information about the function actually used when the terminal performs the random access procedure and random access configuration information about the function intended by the terminal, and In which, when the acquired random access configuration parameters are parameters about all functions intended by the terminal, the random access report sent based on the information about the identified random access configuration parameters includes random access configuration information about the functions actually used when the terminal performs the random access process, and the random access configuration information about the functions intended by the terminal is included or omitted.

11. The terminal according to claim 9, wherein: The controller controls to: When the multiple functions include a slicing function, a random access report is sent to the base station, which also includes slice group information and random access configuration information about the slice group.

12. The terminal according to claim 9, wherein: The controller controls to: A notification report is sent to a base station that a random access report on a combination of multiple functions is possible, an instruction to send a random access report on random access configuration information is received from the base station, the random access configuration information is about at least one function among the multiple functions, and a random access report is sent to the base station, the random access report including random access configuration information about at least one function among the multiple functions that is instructed to be sent.

13. A base station in a wireless communication system, the base station comprising: a transceiver configured to transmit and receive signals; as well as A random access configuration parameter regarding a combination of multiple functions is sent to a terminal, and a random access report regarding a random access procedure performed using the random access configuration parameter is received from the terminal, wherein the random access report includes random access information regarding at least one function used when the random access procedure is performed among the multiple functions.

14. The base station according to claim 13, wherein: The random access procedure is a random access procedure for a function desired by the terminal among multiple functions. Wherein, when the random access configuration parameter is not a parameter about all functions intended by the terminal, the random access report includes random access configuration information about the function intended by the terminal and random access configuration information about the function actually used when the terminal performs the random access procedure, and Among them, when the random access configuration parameters are parameters about all functions intended by the terminal, the random access report includes random access configuration information about the functions actually used when the terminal performs the random access process, and the random access configuration information about the functions intended by the terminal is included or omitted.

15. The base station according to claim 9, wherein: The controller controls to: When the multiple functions include a slicing function, sending a random access report including slice group information and random access configuration information about the slice group to the base station, and Control is performed to send a notification report to a base station that a random access report on a combination of multiple functions is possible, receive an instruction to send a random access report on random access configuration information from the base station, the random access configuration information is about at least one function among the multiple functions, and send a random access report to the base station, the random access report including random access configuration information about at least one function among the multiple functions that is instructed to be sent.

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