Method and apparatus for carrier aggregation based on frequency band group in wireless communication system

Abstract

The present disclosure relates to a 5G or 6G communication system capable of maximizing frequency efficiency in a mobile communication system. According to an embodiment of the present disclosure, a method performed by a UE comprises the steps of: identifying at least one frequency band group comprising at least one frequency band supported by the UE; determining a band combination supported by the UE, on the basis of the at least one frequency band group; and transmitting, to a base station, UE capability information corresponding to each of the at least one frequency band group included in the band combination.

Description

Method and device for combining carriers based on frequency band groups in a wireless communication system

[0001] The present disclosure relates to the operation of a terminal and a base station in a wireless communication system (or mobile communication system). Specifically, the present disclosure relates to a method and device for combining carriers based on frequency band groups in a wireless communication system.

[0002] 5G mobile communication technology defines a wide frequency band to enable fast transmission speeds and new services, and can be implemented not only in the sub-6GHz frequency band, such as 3.5 gigahertz (3.5GHz), but also in the ultra-high frequency band called millimeter wave (mmWave), such as 28GHz and 39GHz ('Above 6GHz'). In addition, for 6G mobile communication technology, which is called the system after 5G communication (Beyond 5G), implementation in the terahertz band (for example, the 3 terahertz (3THz) band at 95GHz) is being considered to achieve a transmission speed that is 50 times faster than 5G mobile communication technology and an ultra-low latency time that is reduced to one-tenth.

[0003] In the early stages of 5G mobile communication technology, the goal is to support services and meet performance requirements for enhanced Mobile Broadband (eMBB), Ultra Reliable & Low Latency Communications (URLLC), and massive Machine-Type Communications (mMTC). These include beamforming and massive MIMO to mitigate path loss of radio waves in ultra-high frequency bands and increase the transmission distance of radio waves, dynamic operation of numerology (multiple subcarrier interval operation, etc.) and slot formats for efficient use of ultra-high frequency resources, initial access technology to support multi-beam transmission and wideband, definition and operation of BWP (Bidth Part), new channel coding methods such as LDPC (Low Density Parity Check) codes for large-capacity data transmission and Polar Code for reliable transmission of control information, L2 pre-processing, and specific Standardization has been progressed for network slicing, which provides dedicated networks specialized for services.

[0004] Currently, discussions are underway to improve and enhance the initial 5G mobile communication technology in consideration of the services that 5G mobile communication technology was intended to support, and physical layer standardization is in progress for technologies such as V2X to assist in driving decisions of autonomous vehicles and increase user convenience based on the vehicle's own location and status information transmitted by the vehicle, NR-U (New Radio Unlicensed) for the purpose of system operation that complies with various regulatory requirements in unlicensed bands, NR terminal low power consumption technology (UE Power Saving), Non-Terrestrial Network (NTN), which is direct terminal-satellite communication to secure coverage in areas where communication with terrestrial networks is impossible, and Positioning.

[0005] In addition, standardization of wireless interface architecture / protocols is in progress for technologies such as intelligent factories (Industrial Internet of Things, IIoT) to support new services through linkage and convergence with other industries, Integrated Access and Backhaul (IAB) that provides nodes for expanding network service areas by integrating wireless backhaul links and access links, Mobility Enhancement technology including Conditional Handover and Dual Active Protocol Stack (DAPS) handover, and 2-step random access (2-step RACH for NR) that simplifies random access procedures. Standardization is also in progress for system architecture / services such as 5G baseline architecture (e.g., Service-based Architecture, Service-based Interface) for grafting Network Functions Virtualization (NFV) and Software-Defined Network (SDN) technologies, and Mobile Edge Computing (MEC) that provides services based on the location of the terminal.

[0006] Once these 5G mobile communication systems are commercialized, an explosive increase in connected devices will be connected to the communication network, necessitating enhanced functionality and performance of 5G mobile communication systems and integrated operation of these connected devices. To this end, new research will be conducted on improving 5G performance and reducing complexity, supporting AI services, metaverse services, and drone communications by leveraging extended reality (XR), artificial intelligence (AI), and machine learning (ML) to efficiently support augmented reality (AR) and virtual reality (VR).

[0007] In addition, the development of these 5G mobile communication systems includes new waveforms to ensure coverage in the terahertz band of 6G mobile communication technology, multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), Array Antenna, and Large Scale Antenna, metamaterial-based lenses and antennas to improve the coverage of terahertz band signals, high-dimensional spatial multiplexing technology using Orbital Angular Momentum (OAM), Reconfigurable Intelligent Surface (RIS) technology, as well as full duplex technology to improve the frequency efficiency and system network of 6G mobile communication technology, satellite, AI (Artificial Intelligence) from the design stage and AI-based communication technology that realizes system optimization by internalizing end-to-end AI support functions, and ultra-high-performance communication and computing resources to provide services with complexity that exceeds the limits of terminal computing capabilities. It can serve as a basis for the development of next-generation distributed computing technologies that can be realized by utilizing them.

[0008] Meanwhile, carrier aggregation, a core and essential technology in wireless communication systems, is evolving with each generation in terms of integrated output, bandwidth, and number of bands. As this evolution deepens the complexity of implementation, research is being conducted on solutions to this problem.

[0009] According to one embodiment of the present disclosure, a method performed by a user equipment (UE) in a wireless communication system is provided. The method may include: identifying at least one frequency band group including at least one frequency band supported by the UE; determining a band combination supported by the UE based on the at least one frequency band group; and transmitting, to a base station, UE capability information corresponding to each of the at least one frequency band group included in the band combination.

[0010] According to one embodiment of the present disclosure, a frequency band group may be defined by grouping at least one frequency band into at least one group based on a frequency range supported by the at least one frequency band.

[0011] According to one embodiment of the present disclosure, adjacent frequency bands may be included in a single frequency band group. According to one embodiment, a single frequency range may be classified into at least three frequency band groups, including a high band group, a mid band group, and a low band group.

[0012] According to one embodiment of the present disclosure, a band combination based on a frequency band group may include a combination between frequency band groups, a non-consecutive combination within the same frequency band group, or a consecutive combination within the same frequency band group.

[0013] According to one embodiment of the present disclosure, UE capability information may include information indicating a band combination supported by the UE. The information indicating the band combination may include a list of frequency band groups. The list of frequency band groups may include band parameter information corresponding to each of the at least one frequency band groups.

[0014] According to one embodiment of the present disclosure, the band parameter information may include frequency band group-related information for next-generation mobile communications. The frequency band group-related information for next-generation mobile communications may include frequency band group indicator information that identifies each of the at least one frequency band groups.

[0015] According to one embodiment of the present disclosure, a method performed by a base station in a wireless communication system is provided. The method may include the steps of: identifying at least one frequency band group including at least one frequency band; and receiving, from a user equipment (UE), UE capability information corresponding to each of at least one frequency band group included in a band combination supported by the UE. The band combination supported by the UE may be determined based on at least one frequency band group supported by the UE.

[0016] According to one embodiment of the present disclosure, a frequency band group may be defined by grouping at least one frequency band into at least one group based on a frequency range supported by the at least one frequency band.

[0017] According to one embodiment of the present disclosure, a user equipment (UE) in a wireless communication system is provided. The UE may include one or more transceivers; one or more processors communicatively coupled with the one or more transceivers; and one or more memories communicatively coupled with the one or more processors. The one or more memories store instructions that the one or more processors can execute alone or in combination, and the instructions may be configured to cause the UE to perform the following: The UE may identify at least one frequency band group including at least one frequency band supported by the UE; determine a band combination supported by the UE based on the at least one frequency band group; and transmit UE capability information corresponding to each of the at least one frequency band group included in the band combination to a base station.

[0018] According to one embodiment of the present disclosure, a frequency band group may be defined by grouping at least one frequency band into at least one group based on a frequency range supported by the at least one frequency band.

[0019] According to one embodiment of the present disclosure, adjacent frequency bands may be included in a single frequency band group. A single frequency range may be classified into at least three frequency band groups, including a high band group, a mid band group, and a low band group.

[0020] According to one embodiment of the present disclosure, a band combination based on a frequency band group may include a combination between frequency band groups, a non-consecutive combination within the same frequency band group, or a consecutive combination within the same frequency band group.

[0021] According to one embodiment of the present disclosure, UE capability information may include information indicating a band combination supported by the UE. The information indicating the band combination may include a list of frequency band groups. The list of frequency band groups may include band parameter information corresponding to each of the at least one frequency band groups.

[0022] According to one embodiment of the present disclosure, the band parameter information may include frequency band group-related information for next-generation mobile communications. The frequency band group-related information for next-generation mobile communications may include frequency band group indicator information that identifies each of the at least one frequency band groups.

[0023] According to one embodiment of the present disclosure, a base station in a wireless communication system is provided. The base station may include one or more transceivers; one or more processors communicatively coupled to the one or more transceivers; and one or more memories communicatively coupled to the one or more processors. The one or more memories store instructions that the one or more processors can execute alone or in combination, and the instructions may be configured to cause the BS to perform the following: The base station may identify at least one frequency band group including at least one frequency band, and receive, from a user equipment (UE), UE capability information corresponding to each of at least one frequency band group included in a band combination supported by the UE. The band combination supported by the UE may be determined based on at least one frequency band group supported by the UE.

[0024] FIG. 1 is a diagram illustrating a basic structure of a time-frequency domain in a wireless communication system according to an embodiment of the present disclosure.

[0025] FIG. 2 is a diagram illustrating a frame, subframe, and slot structure in a wireless communication system according to an embodiment of the present disclosure.

[0026] FIG. 3 is a diagram illustrating an example of bandwidth portion settings in a wireless communication system according to an embodiment of the present disclosure.

[0027] FIG. 4 is a diagram illustrating a wireless protocol structure of a base station and a terminal in a single cell, carrier aggregation, and dual connectivity situation in a wireless communication system according to an embodiment of the present disclosure.

[0028] Figure 5 is a diagram illustrating an example of continuous carrier combining within a band.

[0029] Figure 6 is a diagram illustrating an example of non-contiguous carrier combination within a band.

[0030] Figure 7 is a diagram illustrating an example of inter-band carrier coupling.

[0031] Figure 8 illustrates an example of overlapping bands and adjacent bands in a wireless communication system.

[0032] FIG. 9 is an example of a combination within a frequency band group according to an embodiment of the present disclosure.

[0033] FIG. 10 is an example of a combination between frequency band groups according to one embodiment of the present disclosure.

[0034] FIG. 11 is a diagram illustrating the structure of a terminal in a wireless communication system according to an embodiment of the present disclosure.

[0035] FIG. 12 is a diagram illustrating the structure of a base station in a wireless communication system according to an embodiment of the present disclosure.

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

[0037] In describing the embodiments, descriptions of technical details that are well known in the technical field to which the present disclosure pertains and are not directly related to the present disclosure will be omitted. This is to ensure that the gist of the present disclosure is conveyed more clearly without obscuring it by omitting unnecessary explanations.

[0038] For the same reason, some components in the attached drawings are exaggerated, omitted, or schematically depicted. Furthermore, the dimensions of each component do not entirely reflect its actual size. Identical or corresponding components in each drawing are assigned the same reference numbers.

[0039] The advantages and features of the present disclosure, and methods for achieving them, will become clearer with reference to the embodiments described below in detail together with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below and may be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present disclosure is complete and to fully inform those skilled in the art of the scope of the disclosure, and the present disclosure is defined only by the scope of the claims. Like reference numerals designate like elements throughout the specification. In addition, when describing the present disclosure, if a specific description of a related function or configuration is determined to unnecessarily obscure the gist of the present disclosure, the detailed description thereof will be omitted. In addition, the terms described below are terms defined in consideration of the functions of the present disclosure, and these may vary depending on the intention or custom of the user or operator. Therefore, their definitions should be made based on the contents throughout the specification.

[0040] At this time, it will be understood that each block of the processing flowchart drawings and combinations of the flowchart drawings can be performed by computer program instructions. These computer program instructions can be installed in a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing equipment, so that the instructions executed by the processor of the computer or other programmable data processing equipment create a means for performing the functions described in the flowchart block(s). These computer program instructions can also be stored in a computer-available or computer-readable memory that can direct a computer or other programmable data processing equipment to implement the functions in a specific manner, so that the instructions stored in the computer-available or computer-readable memory can also produce a manufactured item that includes an instruction means for performing the functions described in the flowchart block(s). Since the computer program instructions may be installed on a computer or other programmable data processing device, a series of operational steps may be performed on the computer or other programmable data processing device to create a computer-executable process, and the instructions that cause the computer or other programmable data processing device to perform the steps for performing the functions described in the flowchart block(s) may also provide steps for performing the functions described in the flowchart block(s).

[0041] Additionally, each block may represent a module, segment, or portion of code that contains one or more executable instructions for performing a specific logical function(s). It should also be noted that in some alternative implementation examples, the functions described in the blocks may occur out of order. For example, two blocks depicted in succession may actually be executed substantially concurrently, or the blocks may sometimes be executed in reverse order, depending on their respective functions.

[0042] Here, the term '~ part' used in this embodiment means software or hardware components such as FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit), and the '~ part' performs certain roles. However, the '~ part' is not limited to software or hardware. The '~ part' may be configured to be on an addressable storage medium or may be configured to play one or more processors. Therefore, as an example, the '~ part' includes components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functions provided within the components and '~ parts' may be combined into a smaller number of components and '~ parts' or further separated into additional components and '~ parts'. Additionally, the components and '~parts' may be implemented to activate one or more CPUs within a device or secure multimedia card. In addition, in an embodiment, the '~parts' may include one or more processors.

[0043] The terms used in this invention have been selected from widely used, current terms, taking into account the functions of the invention. However, these terms may vary depending on the intentions of those skilled in the art, precedents, the emergence of new technologies, etc. Furthermore, in certain cases, terms may be arbitrarily selected by the applicant, in which case their meanings will be described in detail in the relevant description of the invention. Therefore, the terms used in this invention should not be defined simply as names, but rather based on their inherent meanings and the overall content of the invention.

[0044] When a part of the specification is said to "include" a component, this does not exclude other components, but rather implies the inclusion of other components, unless otherwise specifically stated. Furthermore, terms such as "part," "module," etc., used throughout the specification refer to a unit that processes at least one function or operation, which may be implemented in hardware, software, or a combination of hardware and software.

[0045] Additionally, the description 'at least one of A, B, and C' means that it can be any one of 'A', 'B', 'C', 'A and B', 'A and C', 'B and C', and 'A, B, and C'.

[0046] It should be understood that the combinations of blocks and sequence diagrams in each flowchart can be performed by one or more computer programs containing computer-executable instructions. The one or more computer programs may be stored entirely in a single memory or may be divided and stored in multiple different memories.

[0047] All functions or operations described in this document may be performed by a single processor or a combination of processors. A single processor or a combination of processors is a circuitry that performs processing, and may include circuitry such as an Application Processor (AP), a Communication Processor (CP), a Graphical Processing Unit (GPU), a Neural Processing Unit (NPU), a Microprocessor Unit (MPU), a System on Chip (SoC), or an Integrated Chip (IC).

[0048] A processor may include various processing circuits and / or multiple processors. For example, the term “processor” as used herein, including in the claims, may include various processing circuits, including at least one processor. At least one processor, one or more processors, may be individually and / or collectively configured to perform the various functions described herein in a distributed fashion. As used herein, “processor,” “at least one processor,” and “one or more processors” may be configured to perform multiple functions. However, these terms encompass, without limitation, situations where one processor performs some of the functions and other processor(s) perform other parts of the functions, and situations where a single processor may perform all of the functions. Furthermore, the at least one processor may include a combination of processors that perform various of the disclosed functions in a distributed manner. At least one processor may execute program instructions to achieve or perform various functions.

[0049] Below, with reference to the attached drawings, embodiments of the present invention are described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In addition, in the drawings, parts irrelevant to the description are omitted to clearly explain the present invention, and similar parts are designated with similar reference numerals throughout the specification.

[0050] Wireless communication systems are evolving from providing voice-oriented services in the early days to broadband wireless communication systems that provide high-speed, high-quality packet data services, such as communication standards such as 3GPP's HSPA (High Speed ​​Packet Access), LTE (Long Term Evolution or E-UTRA (Evolved Universal Terrestrial Radio Access)), LTE-Advanced (LTE-A), LTE-Pro, 3GPP2's HRPD (High Rate Packet Data), UMB (Ultra Mobile Broadband), and IEEE's 802.16e.

[0051] As a representative example of the above broadband wireless communication system, the LTE system adopts the OFDM (Orthogonal Frequency Division Multiplexing) method in the downlink (DL) and the SC-FDMA (Single Carrier Frequency Division Multiple Access) method in the uplink (UL). The uplink refers to a wireless link in which a terminal (User Equipment (UE) or Mobile Station (MS)) transmits data or control signals to a base station (eNode B or base station (BS)), and the downlink refers to a wireless link in which a base station transmits data or control signals to a terminal. The above multiple access method can distinguish the data or control information of each user by allocating and operating the time-frequency resources for transmitting data or control information to each user so that they do not overlap, that is, so as to achieve orthogonality.

[0052] As a future communications system beyond LTE, 5G communication systems must be able to freely reflect the diverse needs of users and service providers. Therefore, they must support services that simultaneously satisfy these diverse requirements. Services being considered for 5G communication systems include enhanced Mobile Broadband (eMBB), massive Machine Type Communication (mMTC), and Ultra Reliability Low Latency Communication (URLLC).

[0053] eMBB aims to provide data transmission rates that are significantly higher than those supported by existing LTE, LTE-A, or LTE-Pro. For example, in a 5G communication system, eMBB must be able to support a peak data rate of 20 Gbps in the downlink and a peak data rate of 10 Gbps in the uplink from a single base station. Furthermore, 5G communication systems must simultaneously provide the peak data rate and an increased user-perceived data rate for terminals. To meet these requirements, improvements in various transmission and reception technologies, including improved multi-input, multi-output (MIMO) transmission technology, are required. Furthermore, while LTE transmits signals using a maximum 20 MHz transmission bandwidth in the 2 GHz band, 5G communication systems can meet the data transmission rates required by 5G communication systems by utilizing a wider frequency bandwidth than 20 MHz in the 3-6 GHz or higher 6 GHz bands.

[0054] At the same time, mMTC is being considered to support application services such as the Internet of Things (IoT) in 5G communication systems. To efficiently provide the IoT, mMTC requires supporting large-scale terminal connections within a cell, improved terminal coverage, improved battery life, and reduced terminal costs. The IoT requires the ability to support a large number of terminals (e.g., 1,000,000 terminals / km^2) within a cell, as it provides communication capabilities through the attachment of various sensors and devices. Furthermore, terminals supporting mMTC are likely to be located in shadow areas not covered by cells, such as basements, due to the nature of the service. This may require wider coverage than other services provided by 5G communication systems. Terminals supporting mMTC must be inexpensive, and since frequent battery replacement is unlikely, very long battery lifespans, such as 10 to 15 years, may be required.

[0055] Finally, URLLC refers to cellular-based wireless communication services used for specific mission-critical purposes. Examples include remote control of robots or machinery, industrial automation, unmanned aerial vehicles (UAVs), remote health care, and emergency alerts. Therefore, URLLC communications must offer extremely low latency and high reliability. For example, URLLC-enabled services must meet air interface latency requirements of less than 0.5 milliseconds and a packet error rate (PER) of 10-5 or lower. Therefore, for URLLC-enabled services, 5G systems must provide shorter Transmit Time Intervals (TTIs) than other services, while simultaneously allocating extensive resources in the frequency band to ensure communication link reliability.

[0056] The three 5G services—eMBB, URLLC, and mMTC—can be multiplexed and transmitted within a single system. To meet the differing requirements of each service, different transmission and reception techniques and parameters can be used. Of course, 5G is not limited to the three services described above.

[0057] Hereinafter, the base station is an entity that performs resource allocation of the terminal, and may be at least one of a gNode B, an eNode B, a Node B, a BS (Base Station), a wireless access unit, a base station controller, or a node on a network. The terminal may include a UE (User Equipment), an MS (Mobile Station), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing a communication function. In the present disclosure, downlink (DL) refers to a wireless transmission path of a signal transmitted from a base station to a terminal, and uplink (UL) refers to a wireless transmission path of a signal transmitted from a terminal to a base station. In addition, although the LTE or LTE-A system may be described below as an example, the embodiments of the present disclosure may also be applied to other communication systems having a similar technical background or channel type. For example, the 5th generation mobile communication technology (5G, new radio, NR) developed after LTE-A may be included here, and the 5G below may also be a concept that includes existing LTE, LTE-A, and other similar services. In addition, the present disclosure may be applied to other communication systems with some modifications within a scope that does not significantly deviate from the scope of the present disclosure, as judged by a person having skilled technical knowledge.

[0058] Hereinafter, a / b can be understood as at least one of a or b.

[0059] Various embodiments of the present disclosure aim to provide devices and methods capable of effectively providing services in a mobile communication system. The various embodiments of the present disclosure address issues arising from the gradual fragmentation and segmentation of frequency-band-based carrier aggregation technology, a core and essential technology in current wireless communication systems, with each successive generation. Furthermore, the present disclosure addresses the gap between the essential information required to support carrier aggregation in terms of actual product development and the information assumed in existing frequency-band-based carrier aggregation technologies. Furthermore, the present disclosure seeks to provide a frequency-band group-based carrier aggregation method for next-generation mobile communication systems.

[0060] According to various embodiments of the present disclosure, a device and method for effectively providing a service in a mobile communication system can be provided.

[0061] According to various embodiments of the present disclosure, a method for setting and utilizing carrier aggregation based on a frequency band group by a terminal and a base station in a next-generation wireless communication system and a device for performing the same can be provided.

[0062] [NR time-frequency resources]

[0063] Below, the frame structure of the 5G system is described in more detail with reference to drawings.

[0064] Figure 1 is a diagram illustrating the basic structure of the time-frequency domain, which is a radio resource domain in which data or control channels are transmitted in a 5G system.

[0065] The horizontal axis of Figure 1 represents the time domain, and the vertical axis represents the frequency domain. The basic unit of resources in the time and frequency domains is a resource element (RE, 001), which can be defined as 1 OFDM symbol (102) on the time axis and 1 subcarrier (103) on the frequency axis. In the frequency domain (For example, 12) consecutive REs can constitute one resource block (RB, 104). One subframe (110) on the time axis can include multiple OFDM symbols (102). For example, the length of one subframe can be 1 ms.

[0066] FIG. 2 is a diagram illustrating a frame, subframe, and slot structure in a wireless communication system according to one embodiment of the present disclosure.

[0067] Figure 2 illustrates an example of a structure of a frame (Frame, 200), a subframe (Subframe, 201), and a slot (Slot, 202). One frame (200) can be defined as 10 ms. One subframe (201) can be defined as 1 ms, and therefore one frame (200) can be composed of a total of 10 subframes (201). One slot (202, 203) can be defined as 14 OFDM symbols (i.e., the number of symbols per slot ( =14). 1 subframe (201) may be composed of one or more slots (202, 203), and the number of slots (202, 203) per 1 subframe (201) may vary depending on the setting value μ (204, 205) for the subcarrier spacing. In an example of FIG. 2, cases where the subcarrier spacing setting value μ = 0 (204) and μ = 1 (205) are illustrated. When μ = 0 (204), 1 subframe (201) may be composed of one slot (202), and when μ = 1 (205), 1 subframe (201) may be composed of two slots (203). That is, the number of slots per 1 subframe ( ) may vary, and accordingly the number of slots per frame ( ) may vary. Depending on the subcarrier spacing setting μ and can be defined as [Table 1] below.

[0068] [Table 1]

[0069]

[0070] [Bandwidth Part (BWP)]

[0071] Next, the bandwidth part (BWP) setting in the 5G communication system will be explained in detail with reference to the drawing.

[0072] FIG. 3 is a diagram illustrating an example of bandwidth portion settings in a wireless communication system according to one embodiment of the present disclosure.

[0073] Figure 3 shows an example in which the UE bandwidth (300) is set to two bandwidth portions, namely, bandwidth portion #1 (BWP#1) (301) and bandwidth portion #2 (BWP#2) (302). The base station can set one or more bandwidth portions to the UE, and can set the following information for each bandwidth portion.

[0074] [Table 2]

[0075]

[0076] Of course, the above example is not limited, and in addition to the above configuration information, various parameters related to the bandwidth portion can be configured for the terminal. The above information can be transmitted from the base station to the terminal via upper layer signaling, for example, RRC (Radio Resource Control) signaling. At least one bandwidth portion among the configured one or more bandwidth portions can be activated. Whether or not the configured bandwidth portion is activated can be semi-statically transmitted from the base station to the terminal via RRC signaling or dynamically transmitted via DCI.

[0077] According to some embodiments, a terminal before RRC connection can be configured with an initial bandwidth portion (Initial BWP) for initial access from a base station through a Master Information Block (MIB). More specifically, the terminal can receive configuration information about a control resource set (CORESET) and a search space in which a PDCCH for receiving system information required for initial access (which may correspond to Remaining System Information (RMSI) or System Information Block 1 (SIB1)) and search space can be transmitted through the MIB during the initial access phase. The control space and search space configured by the MIB can each be regarded as identifier (ID) 0. The base station can notify the terminal of configuration information such as frequency allocation information, time allocation information, and numerology for control space #0 through the MIB. Additionally, the base station can notify the terminal of the monitoring cycle and monitoring occasion settings for control area #0, i.e., search space #0, via the MIB. The terminal can consider the frequency range set as control area #0 obtained from the MIB as the initial bandwidth portion for initial access. At this time, the identifier (ID) of the initial bandwidth portion can be considered as 0.

[0078] The settings for the bandwidth supported by the above 5G can be used for various purposes.

[0079] In some embodiments, when the bandwidth supported by a terminal is smaller than the system bandwidth, this can be supported through bandwidth portion configuration. For example, the base station can configure the bandwidth portion frequency location (configuration information 2) for the terminal, thereby allowing the terminal to transmit and receive data at a specific frequency location within the system bandwidth.

[0080] Additionally, in some embodiments, a base station may configure multiple bandwidth segments for a terminal to support different numerologies. For example, to support data transmission and reception using both 15 kHz and 30 kHz subcarrier spacing for a given terminal, two bandwidth segments may be configured with subcarrier spacings of 15 kHz and 30 kHz, respectively. The different bandwidth segments may be frequency-division multiplexed (FDM), and when data is to be transmitted and received using a specific subcarrier spacing, the bandwidth segment configured for that subcarrier spacing may be activated.

[0081] Furthermore, in some embodiments, the base station may configure bandwidth portions with different bandwidth sizes for the terminal for the purpose of reducing power consumption of the terminal. For example, if the terminal supports a very large bandwidth, for example, 100 MHz, and constantly transmits and receives data using that bandwidth, very large power consumption may occur. In particular, monitoring unnecessary downlink control channels using a large bandwidth of 100 MHz in a situation where there is no traffic may be very inefficient in terms of power consumption. To reduce power consumption of the terminal, the base station may configure a bandwidth portion with a relatively small bandwidth, for example, 20 MHz, for the terminal. In a situation where there is no traffic, the terminal can perform monitoring operations in the 20 MHz bandwidth portion, and when data is generated, it can transmit and receive data using the 100 MHz bandwidth portion according to the instructions of the base station.

[0082] In the method for setting the bandwidth portion, terminals prior to RRC connection (Connected) can receive configuration information for the initial bandwidth portion (Initial BWP) through the MIB during the initial access phase. More specifically, the terminal can receive a control region (i.e., CORESET) for a downlink control channel on which a DCI scheduling a System Information Block (SIB) can be transmitted from the MIB of the PBCH (Physical Broadcast Channel). The bandwidth of the control region set by the MIB can be regarded as the initial bandwidth portion, and the terminal can receive the PDSCH (Physical Downlink Shared Channel) on which the SIB is transmitted through the set initial bandwidth portion. In addition to receiving the SIB, the initial bandwidth portion can also be utilized for other system information (Other System Information (OSI), paging, and random access).

[0083] [Bandwidth Part (BWP) Change]

[0084] When one or more bandwidth part values ​​are set for a terminal, the base station can instruct the terminal to change (or switch, transition) the bandwidth part value using the bandwidth part indicator field in the DCI. For example, in FIG. 3, when the currently activated bandwidth part of the terminal is bandwidth part #1 (301), the base station can instruct the terminal to bandwidth part #2 (302) using the bandwidth part indicator in the DCI, and the terminal can perform a bandwidth part change to bandwidth part #2 (302) indicated by the bandwidth part indicator in the received DCI.

[0085] As described above, since DCI-based bandwidth part change can be indicated by DCI scheduling PDSCH or PUSCH, when a terminal receives a bandwidth part change request, it must be able to receive or transmit PDSCH or PUSCH scheduled by the corresponding DCI without difficulty in the changed bandwidth part. To this end, the standard stipulates the delay time (T) required when changing the bandwidth part. BWP ) and can be defined as follows, for example:

[0086] [Table 3]

[0087]

[0088] The bandwidth-partial change delay time requirement supports Type 1 or Type 2 depending on the terminal's capability. The terminal can report the supported bandwidth-partial delay time type to the base station.

[0089] According to the requirement for bandwidth part change delay time mentioned above, when the terminal receives DCI including bandwidth part change indicator in slot n, the terminal changes to the new bandwidth part indicated by the bandwidth part change indicator in slot n+T. BWP The completion can be done at a later time, and transmission and reception for the data channel scheduled by the DCI can be performed in the new bandwidth portion that has been changed. When the base station wants to schedule a data channel in the new bandwidth portion, the terminal's bandwidth portion change delay time (T BWP ), time domain resource allocation for the data channel can be determined. That is, when the base station schedules the data channel with a new bandwidth portion, the data channel can be scheduled after the bandwidth portion change delay time in the method of determining the time domain resource allocation for the data channel. Accordingly, the terminal can determine whether the DCI instructing the bandwidth portion change is after the bandwidth portion change delay time (T BWP) may not be expected to indicate a slot offset (K0 or K2) value smaller than that.

[0090] If the terminal receives DCI (e.g., DCI format 1_1 or 0_1) indicating a bandwidth change, the terminal may not perform any transmission or reception during the time period from the third symbol of the slot in which the PDCCH including the DCI is received to the start point of the slot indicated by the slot offset (K0 or K2) value indicated by the time domain resource allocation indicator field in the DCI. For example, if the terminal receives DCI indicating a bandwidth change in slot n and the slot offset value indicated by the DCI is K, the terminal may not perform any transmission or reception from the third symbol of slot n to the symbol before slot n+K (i.e., the last symbol of slot n+K-1).

[0091] [CA / DC related]

[0092] FIG. 4 is a diagram illustrating a wireless protocol structure of a base station and a terminal in a single cell, carrier aggregation, and dual connectivity situation according to an embodiment of the present disclosure.

[0093] Referring to FIG. 4, the wireless protocol of the next-generation mobile communication system is composed of NR SDAP (Service Data Adaptation Protocol 425, 470), NR PDCP (Packet Data Convergence Protocol 430, 465), NR RLC (Radio Link Control 435, 460), and NR MAC (Medium Access Control 440, 455) in the terminal and NR base station, respectively.

[0094] The main functions of NR SDAP (425, 470) may include some of the following functions:

[0095] - Transfer of user plane data

[0096] - Mapping function between QoS flow and data bearer for both DL and UL

[0097] - Marking function of QoS flow ID for both uplink and downlink (marking QoS flow ID in both DL and UL packets)

[0098] - Ability to map reflective QoS flow to data bearer for uplink SDAP PDUs (reflective QoS flow to DRB mapping for the UL SDAP PDUs).

[0099] For the above SDAP layer device, the terminal can be configured by an RRC message for each PDCP layer device, each bearer, or each logical channel, whether to use the header of the SDAP layer device or whether to use the function of the SDAP layer device, and when the SDAP header is configured, the terminal can instruct the NAS QoS reflection configuration 1-bit indicator (NAS reflective QoS) and the AS QoS reflection configuration 1-bit indicator (AS reflective QoS) of the SDAP header to update or reset the mapping information for the QoS flow and data bearer of the uplink and downlink. The SDAP header can include QoS flow ID information indicating QoS. The QoS information can be used as data processing priority, scheduling information, etc. to support a smooth service.

[0100] The main functions of NR PDCP (430, 465) may include some of the following functions:

[0101] - Header compression and decompression (ROHC only)

[0102] - User data transfer function

[0103] - In-sequence delivery of upper layer PDUs

[0104] - Out-of-sequence delivery of upper layer PDUs

[0105] - PDCP PDU reordering for reception

[0106] - Duplicate detection of lower layer SDUs

[0107] - Retransmission function (Retransmission of PDCP SDUs)

[0108] - Encryption and decryption functions (Ciphering and deciphering)

[0109] - Timer-based SDU discard in uplink.

[0110] The reordering function of the NR PDCP device above refers to a function of reordering PDCP PDUs received from a lower layer in order based on the PDCP SN (sequence number), and may include a function of transmitting data to an upper layer in the reordered order. Alternatively, the reordering function of the NR PDCP device may include a function of transmitting data directly without considering the order, a function of recording lost PDCP PDUs by reordering the order, a function of reporting a status of lost PDCP PDUs to the transmitting side, and a function of requesting retransmission of lost PDCP PDUs.

[0111] The main functions of NR RLC (435, 460) may include some of the following functions:

[0112] - Data transfer function (Transfer of upper layer PDUs)

[0113] - In-sequence delivery of upper layer PDUs

[0114] - Out-of-sequence delivery of upper layer PDUs

[0115] - ARQ function (Error Correction through ARQ)

[0116] - Concatenation, segmentation and reassembly of RLC SDUs

[0117] - Re-segmentation of RLC data PDUs

[0118] - Reordering of RLC data PDUs

[0119] - Duplicate detection function

[0120] - Protocol error detection

[0121] - RLC SDU discard function

[0122] - RLC re-establishment function

[0123] In the above, the in-sequence delivery function of the NR RLC device refers to the function of sequentially delivering RLC SDUs received from a lower layer to an upper layer. The in-sequence delivery function of the NR RLC device may include a function of reassembling and delivering a single RLC SDU when it is received divided into multiple RLC SDUs, a function of rearranging received RLC PDUs based on the RLC SN (sequence number) or PDCP SN (sequence number), a function of recording lost RLC PDUs by rearranging the order, a function of reporting the status of lost RLC PDUs to the transmitting side, and a function of requesting retransmission of lost RLC PDUs. The in-sequence delivery function of an NR RLC device may include a function to sequentially deliver to the upper layer only the RLC SDUs up to the lost RLC SDU when there is a lost RLC SDU, or may include a function to sequentially deliver to the upper layer all RLC SDUs received before the timer starts if a predetermined timer has expired even if there is a lost RLC SDU. Alternatively, the in-sequence delivery function of an NR RLC device may include a function to sequentially deliver to the upper layer all RLC SDUs received up to the present if a predetermined timer has expired even if there is a lost RLC SDU.In addition, the RLC PDUs may be processed in the order in which they are received (in the order of arrival, regardless of the order of the sequence number) and delivered to the PDCP device out of order (out-of-sequence delivery). In the case of segments, the segments stored in the buffer or to be received later may be received, reconstructed into a complete RLC PDU, processed, and delivered to the PDCP device. The NR RLC layer may not include a concatenation function, and the function may be performed in the NR MAC layer or replaced with a multiplexing function of the NR MAC layer.

[0124] The out-of-sequence delivery function of the NR RLC device above refers to the function of directly delivering RLC SDUs received from a lower layer to an upper layer regardless of the order, and may include a function of reassembling and delivering RLC SDUs when one RLC SDU is received divided into multiple RLC SDUs, and may include a function of storing and arranging the RLC SN or PDCP SN of received RLC PDUs to record lost RLC PDUs.

[0125] NR MAC (440, 455) can be connected to multiple NR RLC layer devices configured in one terminal, and the main functions of NR MAC can include some of the following functions.

[0126] - Mapping function (Mapping between logical channels and transport channels)

[0127] - Multiplexing / demultiplexing of MAC SDUs

[0128] - Scheduling information reporting function

[0129] - HARQ function (Error correction through HARQ)

[0130] - Priority handling between logical channels of one UE

[0131] - Priority handling between UEs by means of dynamic scheduling

[0132] - MBMS service identification function

[0133] - Transport format selection function

[0134] - Padding function

[0135] The NR PHY layer (445, 450) can perform an operation of channel coding and modulating upper layer data, converting it into an OFDM symbol and transmitting it through a wireless channel, or demodulating and channel decoding an OFDM symbol received through a wireless channel and transmitting it to a higher layer.

[0136] The above wireless protocol structure can have various detailed structures depending on the carrier (or cell) operation method. For example, when a base station transmits data to a terminal based on a single carrier (or cell), the base station and the terminal use a protocol structure having a single structure for each layer, as shown in 400. On the other hand, when a base station transmits data to a terminal based on CA (carrier aggregation) using multiple carriers in a single TRP, the base station and the terminal use a protocol structure having a single structure up to RLC but multiplexing the PHY layer through the MAC layer, as shown in 410. As another example, when a base station transmits data to a terminal based on DC (dual connectivity) using multiple carriers in multiple TRPs, the base station and the terminal use a protocol structure having a single structure up to RLC but multiplexing the PHY layer through the MAC layer, as shown in 420.

[0137] [Regarding terminal capability reporting]

[0138] In LTE and NR, a terminal, while connected to a serving base station, can perform a procedure to report its supported capabilities to the base station. In the description below, this is referred to as a UE capability report.

[0139] A base station can transmit a UE capability inquiry message requesting a capability report to a connected terminal. The message can include a UE capability request for each RAT (radio access technology) type of the base station. The RAT type-specific request can include information on a combination of supported frequency bands, etc. In addition, in the case of the UE capability inquiry message, UE capabilities for multiple RAT types can be requested through a single RRC message container transmitted by the base station, or the base station can include multiple UE capability inquiry messages including UE capability requests for each RAT type and transmit them to the terminal. That is, the UE capability inquiry can be repeated multiple times in one message, and the terminal can compose a corresponding UE capability information message and report it multiple times. In the next-generation mobile communication system, a UE capability request can be made for MR-DC (Multi-RAT dual connectivity), including NR, LTE, and EN-DC (E-UTRA - NR dual connectivity). Additionally, the terminal capability inquiry message is typically transmitted initially after the terminal is connected to the base station, but the base station may request it under any conditions when necessary.

[0140] In the above step, the terminal that receives the UE capability report request from the base station configures the terminal capability based on the RAT type and band information requested from the base station. Below is a summary of how the terminal configures the UE capability in the NR system.

[0141] 1. If the UE receives a list of LTE and / or NR bands through a UE capability request from the base station, the UE configures a band combination (BC) for EN-DC and NR standalone (SA). That is, it configures a candidate list of BCs for EN-DC and NR SA based on the bands requested to the base station via FreqBandList. Furthermore, the bands are prioritized in the order listed in FreqBandList.

[0142] 2. If the base station requests UE capability reporting by setting the "eutra-nr-only" flag or the "eutra" flag, the UE completely removes NR SA BCs from the list of configured BC candidates. This operation can only occur when the LTE base station (eNB) requests the "eutra" capability.

[0143] 3. The terminal then removes fallback BCs from the BC candidate list constructed in the above step. Here, a fallback BC is a BC obtained by removing at least one band corresponding to an SCell from a random BC. This step can be omitted because the BC before removing the band corresponding to at least one SCell can already cover the fallback BC. This step also applies to MR-DC, i.e., to LTE bands. The BCs remaining after this step are the final "candidate BC list."

[0144] 4. The terminal selects BCs to report by selecting BCs that match the requested RAT type from the final "candidate BC list" above. In this step, the terminal constructs the supportedBandCombinationList in a set order. That is, the terminal constructs BCs and UE capabilities to report according to the preset rat-Type order (nr -> eutra-nr -> eutra). In addition, it constructs a featureSetCombination for the constructed supportedBandCombinationList, and constructs a list of "candidate feature set combinations" from the candidate BC list after removing the list for the fallback BC (which contains capabilities of the same or lower level). The "candidate feature set combinations" above include feature set combinations for both NR and EUTRA-NR BCs, and can be obtained from the feature set combinations in the UE-NR-Capabilities and UE-MRDC-Capabilities containers.

[0145] 5. Also, if the requested rat Type is eutra-nr and has an effect, featureSetCombinations are included in both containers: UE-MRDC-Capabilities and UE-NR-Capabilities. However, the NR feature set is included only in UE-NR-Capabilities.

[0146] After terminal capabilities are configured, the terminal transmits a terminal capability information message containing the terminal capabilities to the base station. Based on the terminal capabilities received from the terminal, the base station then performs appropriate scheduling and transmission / reception management for the terminal.

[0147] [CA Bandwidth Rating Related]

[0148] Intraband contiguous carrier aggregation is a combination that operates in a single operating band, and follows the carrier aggregation bandwidth class (CA bandwidth class) associated with the bandwidth combination set specified in the specification. That is, for intraband contiguous carrier aggregation, the terminal can set and report to the base station multiple bandwidth combination sets supported per carrier combination configuration, as shown in [Table 4], and requirements for all bandwidth combinations included in one bandwidth combination set can be defined. Intraband non-contiguous carrier aggregation is a combination that operates in a single band that includes two or more sub-blocks, and supports the CA bandwidth class defined for each sub-block, as shown in [Table 5] and [Table 6]. Interband carrier aggregation is a carrier aggregation composed of multiple operating bands that support the CA bandwidth class defined for each band.

[0149] [Table 4]

[0150]

[0151] [Table 5]

[0152]

[0153] [Table 6]

[0154]

[0155] For example, CA bandwidth class A in 5G NR is a class that supports a channel bandwidth that is equal to or lower than the maximum channel bandwidth supported by the corresponding configured band with one carrier, CA bandwidth class B is a class that supports a channel bandwidth that is greater than 20 MHz and equal to or lower than 100 MHz with two consecutive carriers, and CA bandwidth class C is a class that supports a channel bandwidth that is greater than 100 MHz and equal to or lower than twice the maximum channel bandwidth supported by the corresponding configured band with two consecutive carriers. Based on the bandwidth classes of consecutive carrier aggregation within such a band, the method of representing non-contiguous carrier aggregation is as follows.

[0156] - [Example 1] Combining non-contiguous carriers within a band: 1(2A) - Configuring two non-contiguous carriers within band 1.

[0157] - [Example 2] Intraband non-contiguous carrier aggregation: 1(AB) - Three contiguous and non-contiguous carriers within band 1.

[0158] - [Example 3] Inter-band carrier aggregation: 1A_3B, one carrier within band 1 and two consecutive carriers within band 3.

[0159] - [Example 4] Inter-band carrier aggregation: 1(2A)_3B, consisting of two non-contiguous carriers within band 1 and two consecutive carriers within band 3.

[0160] <Example 1: Overview of Frequency Combination Based on Frequency Band Groups>

[0161] Carrier Aggregation (CA) technology combines two or more carriers to efficiently utilize frequencies and improve maximum transmission rates. It originated as a core technology of LTE, commonly referred to as 4G, and numerous frequency combinations supporting CA have been defined up to and including 5G. These CA technologies have been broadly defined into three categories based on the frequency bands defined in the mobile communication standards for each generation and the carrier information for each band.

[0162] Figure 5 is a diagram illustrating an example of continuous carrier combining within a band.

[0163] First, frequency combining between consecutive carriers within the same band (intra-band contiguous CA) is literally a technology that enables simultaneous transmission and reception by combining two consecutive carriers to overcome the limitations of channel bandwidth when continuous frequency use is possible beyond the maximum carrier channel bandwidth in the same band, as shown in FIG. 5, for example, 20 MHz or more for 4G LTE and 100 MHz or more in FR1 (frequency range 1) for 5G NR, and by utilizing continuous frequency resources, it defines the RF receiver performance and requirements by assuming that it is processed as a single receiver depending on the capabilities of receiver components, such as antennas, amplifiers, filters, and oscillators, from the perspective of terminal hardware.

[0164] Figure 6 is a diagram illustrating an example of non-contiguous carrier combination within a band.

[0165] Intra-band non-contiguous CA is a technology that allows two non-contiguous carriers to be transmitted and received simultaneously in each cell in order to increase frequency utilization when non-contiguous frequency use is possible in the same band, for example, when there is an empty frequency between frequency blocks held due to the difference in frequency auction time / period as shown in FIG. 6, or when there are frequencies for different services or cells. In order to minimize interference from other services or cells between non-contiguous frequency resources, it is assumed that these are considered as separate bands from the terminal hardware perspective and that a separate receiver is placed for each carrier to process them, and the RF reception performance and requirements are defined.

[0166] Figure 7 is a diagram illustrating an example of inter-band carrier coupling.

[0167] Inter-band carrier aggregation (inter-band CA) is a technology that enables simultaneous transmission and reception of carriers for each band in each cell in multiple bands, as shown in Fig. 7. From a terminal hardware perspective, it defines RF reception performance and requirements by assuming that a separate receiver is placed for each carrier for processing.

[0168] In addition to the classification by type of supported band and carrier aggregation, it supports combinations between generations (Radio Access Technology, RAT) of mobile communication that support different upper layers, the core network, and as shown in Fig. 4, in the case of combinations within a generation, it can be classified into frequency aggregation (Carrier Aggregation, CA), in the case of combinations between generations, it can be classified into dual connectivity between LTE and NR (EUTRA-NR Dual Connectivity, EN-DC) and dual connectivity between NR and LTE (NR-EUTRA Dual Connectivity, NE-DC) depending on the RAT of the cell, and finally, dual connectivity that supports different upper layers between NR (NR-NR Dual Connectivity, NR-DC). In addition to this, it is further classified and defined in detail by classification by frequency range, classification by bandwidth class supported by each band within the combination, and classification by the number of bands within the combination.

[0169] As the classification of carrier aggregation becomes more detailed and diverse, an intuitive notation of carrier aggregation becomes possible, and the operation and performance of terminals and base stations optimized for each carrier aggregation can be defined. However, on the other hand, in actual implementation, carrier aggregation is defined beyond what is possible to distinguish the operation and performance of terminals and base stations, so it is necessary to distinguish carrier aggregation more than necessary, and a lot of time may be consumed to define combinations that can have the same operation and performance.

[0170] Furthermore, because the supported terminal and base station structures may differ for each combination, the list of combinations that can actually be installed in a product may be limited during the product development stage. Furthermore, the complexity of selecting and developing this list of combinations continues to increase. For example, while the number of frequency combinations (CA, DC, etc.) defined by 3GPP currently exceeds 10,000, less than 1,000 have been commercially developed to date. This suggests that the number of combinations actually installed in a single terminal is likely to be far fewer.

[0171] Moreover, as generations of mobile communication technology gradually evolve, and the frequency ranges defined so far as FR1 (450-7,125 MHz) and FR2 (24.25-71 GHz) increase, or the number of frequency bands in the current FR1 continues to increase to well over 100, it is expected that fragmentation of frequency bands will accelerate within the same frequency range. Based on the factors that define and distinguish the current carrier aggregation, it is clear that the number of frequency combinations that must be defined in the next generation of mobile communication will increase exponentially. Accordingly, there is a growing demand for designing new procedures and methods when defining frequency bands or combinations to be used by the next generation of mobile communication technologies, and solving the problems caused by frequency band fragmentation is emerging as an essential agenda in discussions on the next generation of mobile communication.

[0172] In this embodiment, an overview of a carrier combining method based on a frequency band group is described as one of the solutions found in the gap between the frequency bands and combinations defined in the current mobile communication technology standards and the frequency bands and combinations installed in products.

[0173] At this point, when implementing a terminal that supports carrier aggregation, the frequency bands and combinations that can be supported can be roughly selected based on the multiple RF transceivers (RF chain / transceiver) that the terminal is generally equipped with. At this time, the standard for the capacity that each transceiver can process can be the antenna that directly transmits and receives the signal, amplifier, filter, oscillator, etc. Among these, if we explain based on the power amplifier (PA) and low-noise amplifier (LNA), which are representative active components in the transmission / reception system, the remaining passive components can be designed based on the optimal frequency range that these active components can support. Here, optimization means the frequency range in which the PA or LNA shows the maximum efficiency within a range where the performance is not saturated.

[0174] At this time, it is known that one RF transceiver can support one frequency band range based on one frequency range that can be optimally supported by the corresponding power amplifier or low-noise amplifier, and the number of RF transceivers required can be determined based on this. For example, an RF transceiver utilizing a PA and LNA optimized for the 2 GHz band can be designed to support the main mobile communication band from the 1.7 GHz band to the 2.6 GHz band, and can support numerous bands that are fragmented around 2 GHz, including frequency bands within that frequency range, such as bands 1, 3, 40, and 40. In other words, if an RF transceiver optimized for a certain frequency range supports one frequency band, from the perspective of recent hardware evolution, it can be seen that adjacent frequency bands can also be supported without additional transceivers or hardware changes.

[0175] Likewise, the transceivers within a terminal that support a certain frequency combination can support carrier aggregation between adjacent bands of the frequency bands included in the combination, for example, the 800 MHz band and the 2.1 GHz band based on carrier aggregation consisting of the 900 MHz band and the 1.8 GHz band, based on the terminal hardware structure. As another example, it is known that a terminal that supports a frequency combination consisting of the 700 MHz and 1.8 GHz bands can generally also support a combination between the 800 MHz band and the 2.1 GHz band, which are adjacent bands of each constituent band.

[0176] Ultimately, the support for frequency combinations at actual base stations or terminals is determined not by the configured bands, but by the configured band range. Furthermore, the assumed transceiver performance and requirements for supporting a frequency combination at a terminal are dependent on the hardware architecture of each device. If the transceiver requirements for adjacent bands and frequency combinations are identical, it can be assumed that the same hardware configuration is being assumed.

[0177] Figure 8 illustrates an example of overlapping bands and adjacent bands in a wireless communication system.

[0178] Bands 77 (801) and 78 (802), or bands 77 (801) and 79 (803), which support overlapping bands as in Fig. 8, can be defined as overlapping bands and adjacent bands, respectively. Such overlapping or adjacent frequency bands were not defined separately due to structural problems that cannot be supported by terminals, but rather due to differences in frequency policies or regulations by region or country. However, the transmission and reception performance or requirements of the two bands or combinations have been defined identically because they assume the same hardware and structure. Looking at these actual implementation factors of terminals that support carrier aggregation, it can be explained once again that, ultimately, whether or not a base station or terminal supports frequency combinations is determined not by each configured band, but by the range of the configured band.

[0179] The operation of carrier combining by frequency band group will be described with reference to FIGS. 9 and 10.

[0180] FIG. 9 is an example of a combination within a frequency band group according to an embodiment of the present disclosure.

[0181] For example, as shown in Fig. 9, in the existing inter-band CA scenario between the 600 MHz band 71 (901) and the 700 MHz band 28 (902), if it is assumed that the two bands can be defined as, for example, one band group A (903), then inter-band carrier aggregation can operate like intra-band non-contiguous CA (904), and if the frequency bands included in the band group (or grade / range) and the transmission / reception requirements for each band group can be defined, it can be assumed that all inter-band carrier aggregation included in the corresponding band group A can operate as intra-band carrier aggregation. For example, assuming that bands 71 ​​and 28 belong to the same band group A as in the above example, and band 5, which is an 800 MHz band, and band 8, which is a 900 MHz band, belong to the same band group, if a terminal supports non-contiguous carrier aggregation within band group A, it can be considered that carrier aggregation between bands 5 and 8, which belong to the same band group A, must also be supported as non-contiguous carrier aggregation within band group A.

[0182] FIG. 10 is an example of a combination between frequency band groups according to one embodiment of the present disclosure.

[0183] As shown in FIG. 10, if the carrier aggregation between the 71st band (1001) and the 2.1 GHz band 1, the band (1002) can be defined as the inter-band carrier aggregation (1003) of the band groups A and B, if the 1st band can be defined as another band group, the band group B, and if the 3rd band of the 1.8 GHz band, which is an adjacent band of the 1st band, is defined as the same band group B, the carrier aggregation between the 71st band and the 3rd band can also be defined as the inter-band carrier aggregation between the band groups A and B, similar to the carrier aggregation between the 71st band and the 1st band, and if the terminal reports to the base station that it supports the inter-band carrier aggregation between the band groups A and B, the base station can assume that the terminal supports all inter-band carrier aggregations between the band groups A and B.

[0184] The most significant features of this band-group-based carrier aggregation can be summarized as follows. First, as mentioned earlier, with each successive generation of mobile communication, the expansion of frequency ranges and frequency fragmentation have become more prominent, leading to the expansion of carrier aggregation. This can dramatically resolve unnecessary factors in actual carrier aggregation support, such as excessive frequency combinations or the selection of supported combinations during the development phase, as mentioned in the example above. (For example, if the FR1 frequency bands, which number around 100, are defined as frequency band groups of 10 or fewer, the number of combinations is reduced to approximately 5% or less depending on each criterion.) Accordingly, in terminal and base station design, there is no need to go through the unnecessary effort of selecting supported combinations from over 10,000 combinations. Furthermore, from the mobile communication operator's perspective, it allows for more flexible cell and frequency acquisition plans compared to the existing band-based carrier aggregation, and it can also be much easier to design cell structures that take carrier aggregation into account than the existing band-based carrier aggregation.

[0185] <Second Embodiment: Method for Defining Frequency Band Groups>

[0186] Below, methods for defining a band group and methods for setting frequency resources and combinations supported by a terminal using the band group are described.

[0187] A transceiver supporting a certain band in a terminal can be assumed to have a range that can support not only the band supported by the oscillator, band filter, amplifier (PA or LNA), and antennas included in the transceiver, but also adjacent bands. Therefore, the standard for defining multiple bands as a single band group is the frequency range supported by the band, and depending on the range of bands supported by mobile communication, or frequency ranges, a single frequency range can be classified into low band, mid band, high band, etc. In addition, each band group can be defined by subdividing it into several subgroups (Sungroups) based on the capabilities of the oscillator, band filter, amplifier (PA or LNA), and antennas included in the transceiver.

[0188] [Table 7] and [Table 8] are examples of defining band groups and subgroups for frequency range 1 and frequency range 2, respectively, based on the above understanding. Here, the groups are grades or ranges, and the bands included in each band group / grade / range and subgroup / grade / range can be changed based on other criteria as in the Note below.

[0189] [Table 7]

[0190]

[0191] [Table 8]

[0192]

[0193] As in the example of [Table 7] above, in the case of Frequency Range 1, the low band can be named 1L, the mid band 1M, and the high band 1H, respectively. If the bandwidth that the oscillator, band filter, amplifier (PA or LNA), and antenna included in the terminal's transceiver can handle is about 400 MHz in the low band and about 2 GHz in the high band depending on the band group, then the subgroups within the band group can be further classified as in [Table 7] according to the transceiver capabilities.

[0194] In addition, by specifying the bands included in each band group and subgroup in the band group definition, it is possible to intuitively see which band group a new band should be included in when added, which band group should be used as a basis when setting frequency combinations supported by the terminal, whether it is a frequency combination already supported, or which frequency combination operation or requirement should be applied.

[0195] When creating a frequency combination using the frequency band group defined in this way, the following can be set based on the existing frequency combination classification criteria.

[0196] [Example 2-1] In case of combination between frequency band groups / grades / ranges: In case of a CA combination set as the existing CA_n1A-n8B-n257(2A), each band is included in the frequency band group and subgroup, that is, n1A is bandwidth grade A included in subgroup 1 of frequency band group 1L, n8B is bandwidth grade B included in subgroup 2 of frequency band group 1M, n257(2A) is bandwidth grade (2A) included in frequency band group 2L, and if this is expressed as a frequency combination setting method based on frequency band groups, it can be set as a combination between frequency band groups, such as CA_n1L2A_n1M2B_n2L(2A), and here, the newly defined CA_n1L2A_n1M2B_n2L(2A) based on band groups can include all bands belonging to each band group and subgroup, as in [Table 7] and [Table 8] above.

[0197] For example, in the above example, CA_n1L2A_n1M2B_n2L(2A) can include not only bandwidth group A of band 1, bandwidth group B of band 8, and bandwidth group (2A) of band 257, but also entirely new band combinations, such as bandwidth group A of band 2, bandwidth group B of band 71, and bandwidth group (2A) of band 258, as long as they are combinations between the same band groups.

[0198] [Example 2-2] In case of non-consecutive combination within the same frequency band group / grade / range: In case of frequency combination between bands set as existing CA_n1A-n2B, etc., each band is included in the frequency band group and subgroup, that is, n1A is bandwidth grade A included in subgroup 1 of frequency band group 1M, n2B is bandwidth grade B included in the same frequency band group 1M and subgroup 1, and if this is expressed as a frequency band group-based frequency combination setting method, it can be set as a combination within a frequency band group, such as CA_n1M1(AB), and here, the newly defined CA_n1M1(AB) based on the band group can include all bands belonging to each band group and subgroup, as shown in [Table 7] and [Table 8] above. For example, in the above example, CA_n1M1(AB) can include not only bandwidth group A of band 1, bandwidth group B of band 2, but also entirely new band combinations, such as bandwidth group A of band 3, and bandwidth group B of band 66, as long as they are combinations between the same band groups.

[0199] [Example 2-3] In case of consecutive combinations within the same frequency band group / grade / range: In case of consecutive frequency combinations within a band set as existing CA_n1B, etc., depending on the frequency band group and subgroup that each band is included in, that is, n1B is bandwidth grade B included in subgroup 1 of frequency band group 1M, and if this is expressed as a frequency combination setting method based on frequency band group, it can be set as a combination within a frequency band group, such as CA_n1M1B, etc., and here, CA_n1M1B newly defined based on band group can include all bands belonging to each band group and subgroup, as shown in [Table 7] and [Table 8] above. For example, in the above example, CA_n1M1B can include not only bandwidth group B of band 1, but also entirely new inter-band combinations, such as bandwidth group B of band 3 and bandwidth group B of band 66, as long as they are combinations between the same band groups.

[0200] In this way, carrier aggregation based on band group can be made into carrier aggregation based on terminal transmission / reception method or performance, instead of the existing band-based carrier aggregation that had to define carrier aggregation through the same procedure simply by changing to some adjacent bands regardless of terminal transmission / reception method or performance.

[0201] The above examples may be changed depending on the specific band group / grade / range setting and the frequency bands included, and the carrier combining method of the frequency band group / grade / range concept included in the present disclosure may be applied not only to carrier combining (CA) but also to dual combining (DC).

[0202] <Example 3: Definition and Reporting Method of Frequency Combination Based on Band Group / Rank>

[0203] Hereinafter, the operation of carrier combining based on frequency band group described in the above embodiment, the method of setting a frequency combination supported by a terminal, the method of reporting a list of set frequency combinations to a base station, etc. are specifically described.

[0204] In order to perform carrier aggregation based on a new frequency band group, the band-based information in the existing frequency combination-related RRC parameters must be defined as a new terminal capability for the frequency band group described in the above embodiment and added to the frequency combination-related RRC parameters. That is, in order to perform carrier aggregation based on a frequency band group, parameters for setting the following frequency band group / grade / range must be defined separately from the existing frequency band setting. In order to set a frequency band group, a frequency band group indicator, for example, [FreqBandGroupIndicator], can be defined as in the example of [Table 9].

[0205] [Table 9]

[0206]

[0207] Based on this, examples of carrier combining methods and reporting based on frequency band groups that can be set in the terminal are as follows [Table 10].

[0208] [Table 10]

[0209]

[0210] As shown in [Table 10], if the next generation mobile communication is introduced in the future, instead of bandEUTRA or bandNR, which only contained the existing band number information, in the band parameters (BandParameters) that contain terminal capability information such as bandwidth grade for each band within the frequency combination, a new provisional name [bandGroup6G] can be added, and based on this, terminal capability information for each band group included in each band group combination can be reported to the base station.

[0211] In addition, by adding a list of supported band groups, such as [bandGroupList], to the frequency combination list parameter (BandCombinationList) that includes terminal capabilities for each frequency combination as in [Table 11], the existing frequency band-based carrier combination can be defined as frequency band group-based carrier combination.

[0212] [Table 11]

[0213]

[0214] The new RRC parameters or terminal capabilities proposed in this embodiment may be replaced with band groups / grades / ranges, etc., and other parameters named in the embodiment may also be replaced with other terms.

[0215] FIG. 11 is a diagram illustrating the structure of a terminal in a wireless communication system according to an embodiment of the present disclosure.

[0216] Referring to FIG. 11, the terminal may include a transceiver, which refers to a terminal receiving unit (1100) and a terminal transmitting unit (1110), a memory (not shown), and a terminal processing unit (1105, or terminal control unit or processor). Depending on the communication method of the terminal described above, the transceiver units (1100, 1110), memory, and terminal processing unit (1105) of the terminal may operate.

[0217] However, the terminal components are not limited to the examples described above. For example, the terminal may include more or fewer components than those described above. Furthermore, the transceiver, memory, and processor may be implemented in a single chip.

[0218] The transceiver (1100, 1110) can transmit and receive signals with a base station. Here, the signals can include control information and data. To this end, the transceiver (1100, 1110) can be configured with an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that low-noise amplifies and frequency-converts a received signal. However, this is only one embodiment of the transceiver, and the components of the transceiver are not limited to the RF transmitter and RF receiver.

[0219] Additionally, the transceiver (1100, 1110) can receive a signal through a wireless channel and output it to the processor, and transmit a signal output from the processor through the wireless channel.

[0220] The memory can store various data, programs or applications for driving and controlling the terminal according to one embodiment.

[0221] The memory may include, for example, a non-volatile memory including at least one of a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (e.g., an SD or XD memory, etc.), a ROM (Read-Only Memory), and an EEPROM (Electrically Erasable Programmable Read-Only Memory), a PROM (Programmable Read-Only Memory), and a volatile memory such as a RAM (Random Access Memory) or a SRAM (Static Random Access Memory).

[0222] The memory may store instructions, data structures, and program codes that can be read by the processor (or terminal processing unit). The memory may store computer programs, codes, or instructions that can be executed by the processor (1105). According to one embodiment, the computer programs, codes, or instructions that can be executed by the processor (1105) may be stored in one memory device or may be stored separately and distributed across two or more memory devices. The processor (1105) may perform various functions according to embodiments of the present disclosure by executing instructions stored in the memory. According to one embodiment of the present disclosure, the operation of the terminal may be caused to be performed based on at least one processor (or processing circuit) configured to individually or collectively or in any combination perform the features of the present disclosure based on the execution of instructions (or computer programs or codes) stored in a memory, based on processing circuitry not configured to execute instructions, and / or based on components of a processing circuitry not configured to execute instructions.

[0223] Memory can store programs and data necessary for the terminal's operation. Furthermore, memory can store control information or data included in signals transmitted and received by the terminal. Memory can be comprised of a storage medium, such as ROM, RAM, a hard disk, CD-ROM, or DVD, or a combination of such storage media. Furthermore, there can be multiple memories.

[0224] In addition, the processor (1105) can control a series of processes so that the terminal can operate according to the above-described embodiment. There may be a plurality of processors (1105), and the processor (11050) can perform component control operations of the terminal by executing a program stored in a memory.

[0225] A processor may be composed of hardware components that perform arithmetic, logic, and input / output operations and signal processing. One or more processors included in the processor may be circuitry such as a System on Chip (SoC), an Integrated Circuit (IC), etc. The processor (210) may be composed of at least one of, for example, a Central Processing Unit (CPU), a microprocessor, a Graphic Processing Unit (GPU), Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), and Field Programmable Gate Arrays (FPGAs), but is not limited thereto.

[0226] The processor (1105) can write data to memory, read data stored in memory, and process data according to predefined operation rules, particularly by executing a program or at least one instruction stored in memory.

[0227] The processor (1105) may perform the operations described above by executing at least one instruction stored in the memory. The processor (1105) may include at least one processor (or processing circuitry), and at least one processor may perform the following operations individually, collectively, or in any combination. For example, the processor (1105) may include a communication processor (CP) that controls communication operations and an application processor (AP) that controls execution of a higher layer (e.g., an application layer). In a specific embodiment, at least a portion of the processor (1105) may be included in one chip, and another portion of the processor (1105) may be included in a separate chip. Alternatively, at least one processor may be included in another component, for example, a transceiver (1100, 1110), or a memory. To this end, the processor (1105) can control other components of the terminal to perform various operations by executing computer programs, codes, or instructions stored in memory.

[0228] FIG. 12 is a diagram illustrating the structure of a base station in a wireless communication system according to an embodiment of the present disclosure.

[0229] Referring to FIG. 12, the base station may include a transceiver, which refers to a base station receiver (1200) and a base station transmitter (1210), a memory (not shown), and a base station processor (1205, or a base station control unit or processor). Depending on the communication method of the base station described above, the transceiver (1200, 1210), the memory, and the base station processor (1205) of the base station may operate. However, the components of the base station are not limited to the examples described above. For example, the base station may include more or fewer components than the components described above. In addition, the transceiver, the memory, and the processor may be implemented in the form of a single chip.

[0230] The transceiver (1200, 1210) can transmit and receive signals with the terminal. Here, the signals can include control information and data. To this end, the transceiver (1200, 1210) can be configured with an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that low-noise amplifies and frequency-converts a received signal. However, this is only one embodiment of the transceiver, and the components of the transceiver are not limited to the RF transmitter and RF receiver.

[0231] Additionally, the transceiver (1200, 1210) can receive a signal through a wireless channel and output it to the processor, and transmit the signal output from the processor through the wireless channel.

[0232] The memory may store various data, programs or applications for driving and controlling the base station according to one embodiment.

[0233] The memory may include, for example, a non-volatile memory including at least one of a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (e.g., an SD or XD memory, etc.), a ROM (Read-Only Memory), and an EEPROM (Electrically Erasable Programmable Read-Only Memory), a PROM (Programmable Read-Only Memory), and a volatile memory such as a RAM (Random Access Memory) or a SRAM (Static Random Access Memory).

[0234] The memory may store instructions, data structures, and program codes that can be read by the processor (or base station processing unit). The memory may store computer programs, codes, or instructions that can be executed by the processor (1205). According to one embodiment, the computer programs, codes, or instructions that can be executed by the processor (1205) may be stored in a single memory device or may be stored separately and distributed across two or more memory devices. The processor (1205) may perform various functions according to embodiments of the present disclosure by executing instructions stored in the memory. According to one embodiment of the present disclosure, the operation of the base station may be caused to be performed based on at least one processor (or processing circuit) configured to individually or collectively or in any combination perform the features of the present disclosure based on the execution of instructions (or computer programs or codes) stored in the memory (1205), based on processing circuitry not configured to execute instructions, and / or based on components of a processing circuitry not configured to execute instructions.

[0235] The memory can store programs and data necessary for the operation of the base station. Furthermore, the memory can store control information or data included in signals transmitted and received by the base station. The memory can be comprised of a storage medium, such as ROM, RAM, a hard disk, CD-ROM, or DVD, or a combination of such storage media. Furthermore, there can be multiple memories.

[0236] The processor (1205) can control a series of processes so that the base station can operate according to the embodiments of the present disclosure described above. There may be multiple processors (1205), and the processors can perform component control operations of the base station by executing programs stored in memory.

[0237] The processor (1205) may be composed of hardware components that perform arithmetic, logic, and input / output operations and signal processing. One or more processors included in the processor may be circuitry such as a System on Chip (SoC), an Integrated Circuit (IC), etc. The processor (210) may be composed of at least one of, for example, a Central Processing Unit (CPU), a microprocessor, a Graphic Processing Unit (GPU), Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), and Field Programmable Gate Arrays (FPGAs), but is not limited thereto.

[0238] The processor (1205) can write data to memory, read data stored in memory, and process data according to predefined operating rules, particularly by executing a program or at least one instruction stored in memory.

[0239] The processor (1205) may perform the operations described above by executing at least one instruction stored in the memory. The processor (1205) may include at least one processor (or processor circuitry), and at least one processor may perform the operations described below individually, collectively, or in any combination. In a specific embodiment, at least a portion of the processor (1205) may be included in one chip, and another portion of the processor (1205) may be included in a separate chip. Alternatively, at least one processor may be included in another component, for example, a transceiver (1200, 1210), or a memory. The processor (1205) may perform, cause, or control the operations of the base station to perform at least one or a combination of the methods according to embodiments of the present disclosure. To this end, the processor (1205) can control other components of the base station to perform various operations by executing computer programs, codes, and instructions stored in memory.

[0240] 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.

[0241] When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. The one or more programs stored in the computer-readable storage medium are configured for execution by one or more processors within an electronic device. The one or more programs include instructions that cause the electronic device to execute methods according to the embodiments described in the claims or specification of the present disclosure.

[0242] These programs (software modules, software) may be stored in random access memory, non-volatile memory including flash memory, read only memory (ROM), electrically erasable programmable read only memory (EEPROM), magnetic disc storage device, compact disc ROM (CD-ROM), digital versatile discs (DVDs) or other forms of optical storage device, magnetic cassette. Or, they may be stored in a memory configured as a combination of some or all of these. In addition, each configuration memory may be included in multiple numbers.

[0243] Additionally, the program may be stored on an attachable storage device that is accessible via a communication network, such as the Internet, an intranet, a local area network (LAN), a wide local area network (WLAN), a storage area network (SAN), or a combination thereof. Such a storage device may be connected to a device performing an embodiment of the present disclosure via an external port. Additionally, a separate storage device on the communication network may be connected to a device performing an embodiment of the present disclosure.

[0244] In the specific embodiments of the present disclosure described above, components included in the invention are expressed in the singular or plural form, depending on the specific embodiment presented. However, the singular or plural expressions are selected to suit the presented situation for convenience of explanation, and the present disclosure is not limited to singular or plural components. Components expressed in the plural form may be composed of singular elements, or components expressed in the singular form may be composed of plural elements.

[0245] Meanwhile, the embodiments of the present disclosure disclosed in this specification and drawings are only specific examples to easily explain the technical contents of the present disclosure and help understand the present disclosure, and are not intended to limit the scope of the present disclosure. In other words, it will be apparent to those skilled in the art that other modifications based on the technical idea of ​​the present disclosure are possible. In addition, the above-mentioned embodiments can be combined and operated with each other as needed. For example, parts of one embodiment of the present disclosure and parts of another embodiment can be combined with each other to operate a base station and a terminal. For example, parts of the first embodiment and the second embodiment of the present disclosure can be combined with each other to operate a base station and a terminal. In addition, although the above-mentioned embodiments have been presented based on an FDD LTE system, other modifications based on the technical idea of ​​the above-mentioned embodiments can be implemented with other systems such as a TDD LTE system, 5G, or NR system.

[0246] Meanwhile, in the drawings explaining the operating method according to one embodiment, the order of description does not necessarily correspond to the order of execution, and the order of precedence may be changed or executed in parallel.

[0247] Alternatively, the drawings illustrating the method of the present disclosure may omit some components and include only some components without detracting from the essence of the present invention.

[0248] Furthermore, the method of the present disclosure may be implemented by combining some or all of the contents included in each embodiment, as long as it does not detract from the essence of the invention. That is, the method may be implemented in a manner determined by combining one or at least two of the aforementioned techniques. For example, it may be possible to perform a portion of the operation of one embodiment by combining it with a portion of the operation of another embodiment.

[0249] According to one embodiment of the present disclosure, at least one operating method of a terminal or a base station may be implemented in the form of program commands that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may include program commands, data files, data structures, etc., either singly or in combination. The program commands recorded on the medium may be those specially designed and configured for the present invention or may be those known and usable by those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, and hardware devices specially configured to store and execute program commands, such as ROMs, RAMs, and flash memories. Examples of program commands include not only machine language codes generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter, etc.

[0250] Additionally, the operating method of at least one of the terminals or base stations according to the disclosed embodiments may be provided as a computer program product. The computer program product may be traded as a product between a seller and a buyer.

[0251] A computer program product may include a software program and a computer-readable storage medium on which the software program is stored. For example, a computer program product may include a product in the form of a software program (e.g., a downloadable app) distributed electronically by an electronic device manufacturer or through an electronic marketplace (e.g., Google Play Store, App Store). For electronic distribution, at least a portion of the software program may be stored on a storage medium or temporarily created. In this case, the storage medium may be a storage medium of a manufacturer's server, an electronic marketplace server, or a relay server that temporarily stores the software program.

[0252] In a system comprising a server and a client device, the computer program product may include a storage medium of the server or a storage medium of the client device. Alternatively, if a third device (e.g., a smartphone) exists that is communicatively connected to the server or the client device, the computer program product may include a storage medium of the third device. Alternatively, the computer program product may include a software program itself that is transmitted from the server to the client device or the third device, or from the third device to the client device.

[0253] In this case, one of the server, the client device, and the third device may execute the computer program product to perform the method according to the disclosed embodiments. Alternatively, two or more of the server, the client device, and the third device may execute the computer program product to perform the method according to the disclosed embodiments in a distributed manner.

[0254] For example, a server (e.g., a cloud server or an artificial intelligence server, etc.) may execute a computer program product stored on the server, thereby controlling a client device in communication with the server to perform a method according to the disclosed embodiments.

[0255] Although the embodiments have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims also fall within the scope of the present invention.

[0256] Various embodiments of the present disclosure have been described above. The foregoing description of the present disclosure is for illustrative purposes only, and the embodiments of the present disclosure are not limited to the disclosed embodiments. Those skilled in the art will appreciate that the present disclosure can be readily modified into other specific forms without altering the technical spirit or essential characteristics of the present disclosure. The scope of the present disclosure is indicated by the claims described below rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present disclosure.

[0257] A method of operating a terminal according to one embodiment of the present disclosure may include a step of grouping at least one frequency band supported by the terminal into at least one group.

[0258] A method of operating a terminal according to one embodiment of the present disclosure may include a step of transmitting terminal capability information corresponding to each of the at least one group grouped to a base station.

[0259] While the detailed description of this disclosure has described specific embodiments, it should be understood that various modifications are possible without departing from the scope of this disclosure. Therefore, the scope of this disclosure should not be limited to the described embodiments, but should be defined not only by the scope of the claims described below, but also by equivalents thereof.

Claims

1. A method performed by a UE (user equipment) in a wireless communication system, A step of identifying at least one frequency band group, the frequency band including at least one frequency band supported by the UE; A step of determining a band combination supported by the UE based on at least one frequency band group; and A method comprising: transmitting, to a base station, UE capability information corresponding to each of the at least one frequency band group included in the band combination.

2. In paragraph 1, A method characterized in that a frequency band group is defined by grouping at least one frequency band into at least one group based on a frequency range supported by at least one frequency band.

3. In paragraph 2, Adjacent frequency bands are included in one frequency band group, and A method characterized in that one frequency range is divided into at least three frequency band groups, including a high band group, a mid band group, and a low band group.

4. In the first paragraph, the band combination based on the frequency band group is A method comprising combinations between frequency band groups, non-consecutive combinations within the same frequency band group, or continuous combinations within the same frequency band group.

5. In the first paragraph, the UE capability information is: Contains information indicating the band combination supported by the UE, The information indicating the above band combination includes information on a list of frequency band groups, and A method characterized in that the list information of the frequency band group includes band parameter information corresponding to each of the at least one frequency band group.

6. In the fifth paragraph, the band parameter information is: Contains information related to frequency band groups for next-generation mobile communications, A method, characterized in that the frequency band group related information for the next generation mobile communication includes frequency band group indicator information that identifies each of the at least one frequency band group.

7. In a method performed by a base station in a wireless communication system, identifying at least one frequency band group comprising at least one frequency band; and A step of receiving, from a UE (user equipment), UE capability information corresponding to each of at least one frequency band group included in a band combination supported by the UE; A method wherein the band combination supported by the UE is determined based on at least one frequency band group supported by the UE.

8. In paragraph 7, A method characterized in that a frequency band group is defined by grouping at least one frequency band into at least one group based on a frequency range supported by at least one frequency band.

9. In the UE (user equipment) of a wireless communication system, One or more transceivers; One or more processors communicatively coupled to said one or more transceivers; one or more memories communicatively coupled to said one or more processors; The one or more memories store instructions that the one or more processors can execute alone or in combination, the instructions being configured to cause the UE to perform the following: Identifying at least one frequency band group comprising at least one frequency band supported by the UE; Determine a band combination supported by the UE based on at least one frequency band group; A UE that transmits UE capability information corresponding to each of the at least one frequency band group included in the band combination to the base station.

10. In paragraph 9, the frequency band group is: A UE characterized in that at least one frequency band is defined by grouping said at least one frequency band into at least one group based on a frequency range supported by said at least one frequency band.

11. In paragraph 10, Adjacent frequency bands are included in one frequency band group, and A UE characterized in that one frequency range is divided into at least three frequency band groups, including a high band group, a mid band group, and a low band group.

12. In the 9th paragraph, the band combination based on the frequency band group is A UE including combinations between frequency band groups, non-consecutive combinations within the same frequency band group, or consecutive combinations within the same frequency band group.

13. In paragraph 9, the UE capability information is: Contains information indicating the band combination supported by the UE, The information indicating the above band combination includes information on a list of frequency band groups, and A UE characterized in that the list information of the frequency band group includes band parameter information corresponding to each of the at least one frequency band group.

14. In the 13th paragraph, the band parameter information is: Contains information related to frequency band groups for next-generation mobile communications, A UE characterized in that the frequency band group related information for the next generation mobile communication includes frequency band group indicator information that identifies each of the at least one frequency band group.

15. In a base station in a wireless communication system, One or more transceivers; One or more processors communicatively coupled to said one or more transceivers; one or more memories communicatively coupled to said one or more processors; The one or more memories store instructions that the one or more processors can execute alone or in combination, the instructions being configured to cause the BS to perform the following: Identifying at least one frequency band group comprising at least one frequency band, Receive UE capability information corresponding to each of at least one frequency band group included in a band combination supported by the UE (user equipment), A base station, wherein the band combination supported by the UE is determined based on at least one frequency band group supported by the UE.

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