Method and apparatus for measuring and reporting signal in wireless communication system

Abstract

A method performed by a user terminal in a wireless communication system, according to embodiments of the present disclosure, comprises the steps of: receiving, from a base station, a plurality of pieces of system information including group information related to a plurality of cells; measuring, on the basis of the group information, synchronization signal blocks (SSBs) received through cells belonging to the same group; and transmitting a report about the measurement to the base station.

Description

Method and apparatus for measuring and reporting signals in a wireless communication system

[0001] The present disclosure relates to a method and apparatus for measuring a signal in a wireless communication system and reporting the measured result. Specifically, it relates to a method comprising setting information and corresponding operations for measuring a signal in a wireless communication system and reporting the measurement result, and an apparatus for performing the same.

[0002] Looking back at the evolution of wireless communication through successive generations, technologies have been developed primarily for human-oriented services, such as voice, multimedia, and data. Following the commercialization of 5G (5th Generation) communication systems, connected devices, which have been increasing explosively, are expected to be connected to communication networks. Examples of networked objects include vehicles, robots, drones, home appliances, displays, smart sensors installed in various infrastructures, construction machinery, and factory equipment. Mobile devices are expected to evolve into various form factors, such as augmented reality glasses, virtual reality headsets, and holographic devices. In the 6G (6th Generation) era, efforts are underway to develop improved 6G communication systems to connect hundreds of billions of devices and objects to provide diverse services. For this reason, 6G communication systems are being referred to as "beyond 5G" systems.

[0003] In the 6G communication system predicted to be realized around 2030, the maximum transmission speed is tera (i.e., 1,000 gigabit) bps (bit per second), and the wireless latency is 100 microseconds (μsec). In other words, compared to the 5G communication system, the transmission speed in the 6G communication system is 50 times faster, and the wireless latency is reduced to one-tenth.

[0004] To achieve such high data transmission speeds and ultra-low latency, 6G communication systems are being considered for implementation in the terahertz (THz) band (e.g., the 95 gigahertz (GHz) to 3 terahertz (3THz) band). Due to more severe path loss and atmospheric absorption phenomena compared to the millimeter wave (mmWave) band introduced in 5G, the importance of technologies capable of guaranteeing signal reach, or coverage, is expected to increase in the terahertz band. As key technologies to ensure coverage, new waveforms, beamforming, and multi-antenna transmission technologies such as massive Multiple-Input and Multiple-Output (MIMO), Full Dimensional MIMO (FD-MIMO), array antennas, and large-scale antennas, which are superior in terms of coverage compared to RF (Radio Frequency) devices, antennas, and OFDM (Orthogonal Frequency Division Multiplexing), must be developed. In addition, new technologies such as metamaterial-based lenses and antennas, high-dimensional spatial multiplexing technology using Orbital Angular Momentum (OAM), and Reconfigurable Intelligent Surface (RIS) are being discussed to improve the coverage of terahertz band signals.

[0005] In addition, to improve frequency efficiency and system network, development is underway in 6G communication systems for full duplex technology, in which uplink and downlink simultaneously utilize the same frequency resources at the same time; network technology that integrates satellites and HAPS (High-Altitude Platform Stations); network structure innovation technology that supports mobile base stations and enables network operation optimization and automation; dynamic spectrum sharing technology through collision avoidance based on spectrum usage prediction; AI-based communication technology that utilizes AI (Artificial Intelligence) from the design stage and internalizes end-to-end AI support functions to realize system optimization; and next-generation distributed computing technology that realizes services of complexity exceeding the limits of terminal computing capabilities by utilizing ultra-high performance communication and computing resources (Mobile Edge Computing (MEC), cloud, etc.). In addition, attempts are continuing to further strengthen connectivity between devices, further optimize networks, promote the softwareization of network entities, and increase the openness of wireless communication through the design of new protocols to be used in 6G communication systems, the implementation of hardware-based security environments, the development of mechanisms for the safe utilization of data, and the development of technologies regarding privacy maintenance methods.

[0006] Due to the research and development of such 6G communication systems, it is expected that a new dimension of hyper-connected experience will become possible through the hyper-connectivity of 6G communication systems, which encompasses not only connections between objects but also connections between people and objects. Specifically, it is projected that 6G communication systems will enable the provision of services such as truly immersive eXtended Reality (XR), high-fidelity mobile holograms, and digital replicas. Furthermore, services such as remote surgery, industrial automation, and emergency response, which are provided through 6G communication systems with enhanced security and reliability, will be applied in various fields including industry, healthcare, automotive, and home appliances.

[0007] One objective of the present disclosure may be to provide a method and apparatus for measuring radio frequency (RF) signals in communication systems such as 5G, 5G-Advanced, and 6G, and for reporting the measured results.

[0008] A method performed by a user terminal in a wireless communication system according to embodiments of the present disclosure comprises: receiving a plurality of system information including group information related to a plurality of cells from a base station; measuring synchronization signal blocks (SSBs) received through cells belonging to the same group based on the group information; and transmitting a report of the measurement to the base station.

[0009] In one embodiment, a plurality of system information includes first system information, second system information, and third system information, wherein the first system information includes first group information related to a serving cell of a terminal, the second system information includes second group information regarding a first neighbor cell having the same frequency band as the serving cell, and the third system information may include third group information regarding a second neighbor cell having a different frequency band as the serving cell.

[0010] In one embodiment, the first system information includes a system information block (SIB) 1, the second system information includes an SIB 3, and the third system information includes an SIB 4, and the SIB 1, SIB 3, and SIB 4 can be broadcasted.

[0011] In one embodiment, the method may further include the steps of receiving a radio resource control (RRC) message containing updated group information related to a plurality of cells from a base station, measuring SSBs received through cells belonging to the same updated group based on the updated group information, and transmitting a report to the base station regarding the measurement based on the updated group information.

[0012] In one embodiment, the report includes a plurality of measurement results for each of the plurality of cells, and among the plurality of measurement results, the first measurement result includes information about the first SSB having the best signal quality among the cells in the same group as the terminal's serving cell, and among the plurality of measurement results, the second measurement result may include information about the second SSB having the best signal quality among the cells in a different group from the serving cell.

[0013] The method and apparatus according to the embodiments of the present disclosure can more efficiently measure a signal in a wireless communication system and report the measured result.

[0014] Specifically, embodiments of the present disclosure can measure signals transmitted through different beams and report measurement results when a base station can transmit signals using different beams on the same time resource.

[0015] In addition, embodiments of the present disclosure can measure signals transmitted through different component carriers (CCs) and report measurement results when a base station can transmit signals using different component carriers (CCs) on the same time resource.

[0016] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs from the description below.

[0017] The features and advantages of the embodiments of the present disclosure will become more apparent from the following description together with the accompanying drawings.

[0018] FIG. 1 illustrates a wireless communication system according to embodiments of the present disclosure.

[0019] FIG. 2 is a drawing for explaining the structure of a terminal according to embodiments of the present disclosure.

[0020] FIG. 3 is a drawing for explaining the structure of a network entity (or base station) according to embodiments of the present disclosure.

[0021] FIG. 4 is a drawing for explaining a beam sweeping operation method of a base station according to embodiments of the present disclosure.

[0022] FIG. 5 is a diagram illustrating a beam sweeping method for SSB transmission of a base station according to embodiments of the present disclosure.

[0023] FIG. 6 illustrates the transmission and reception operation of a user terminal and a base station according to embodiments of the present disclosure.

[0024] FIG. 7 illustrates system information according to embodiments of the present disclosure.

[0025] FIG. 8 illustrates the transmission and reception operation of a user terminal and a base station according to embodiments of the present disclosure.

[0026] FIG. 9 illustrates information included in an RRC release message according to embodiments of the present disclosure.

[0027] FIG. 10 illustrates the transmission and reception operation of a user terminal and a base station according to embodiments of the present disclosure.

[0028] FIG. 11 illustrates setting information related to the measurement of a user terminal according to embodiments of the present disclosure.

[0029] FIG. 12 illustrates information related to the measurement results of a user terminal according to embodiments of the present disclosure.

[0030] FIG. 13 illustrates the exchange of group information between base stations according to embodiments of the present disclosure.

[0031] FIG. 14 illustrates the operation of exchanging group information between base stations according to embodiments of the present disclosure.

[0032] FIG. 15 illustrates transmission and reception information between base stations according to embodiments of the present disclosure.

[0033] Embodiments of the present disclosure may solve the problems and / or disadvantages described above and provide the advantages described below. One aspect of the present disclosure may provide a network entity (or node) and a method of communication thereof in a wireless communication system.

[0034] The terms used in this disclosure are used merely to describe specific embodiments and are not intended to limit the scope of other embodiments. A singular expression may include a plural expression unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as generally understood by those skilled in the art described in this disclosure. Terms used in this disclosure that are defined in a general dictionary may be interpreted as having the same or similar meaning as they have in the context of the relevant technology, and are not to be interpreted in an ideal or overly formal sense unless explicitly defined in this disclosure. In some cases, even terms defined in this disclosure are not to be interpreted to exclude the embodiments of this disclosure.

[0035] The various embodiments of the present disclosure described below illustrate a hardware-based approach. However, since the various embodiments of the present disclosure include techniques using both hardware and software, the various embodiments of the present disclosure do not exclude a software-based approach.

[0036] Additionally, various embodiments of the present disclosure describe various embodiments using terms used in some communication standards (e.g., 3GPP (3rd generation partnership project)), but this is merely for illustrative purposes. Various embodiments of the present disclosure can be easily modified and applied to other communication systems.

[0037] Various embodiments of the present disclosure are described below.

[0038] FIG. 1 illustrates a wireless communication system according to embodiments of the present disclosure.

[0039] FIG. 1 illustrates a base station (110), a first terminal (120), and / or a second terminal (130) as part of nodes utilizing a wireless channel in a wireless communication system. FIG. 1 illustrates only one base station, but this is merely an example. The wireless communication system of FIG. 1 may include other base stations identical or similar to the base station (110).

[0040] A base station (110) is a network infrastructure that provides wireless access to terminals (120, 130). The base station (110) has coverage defined as a certain geographical area based on the distance at which it can transmit signals. In addition to being a base station, the base station (110) may be referred to as an 'access point (AP)', 'evolved Node B (eNB)', 'next generation node B (gNB)', '5G node (5th generation node)', 'wireless point', 'transmission / reception point (TRP)', or other terms having an equivalent technical meaning.

[0041] Each of the first terminal (120) and the second terminal (130) is a device used by a user and can perform communication with the base station (110) via a wireless channel. At least one of the first terminal (120) or the second terminal (130) can be operated without user involvement. For example, at least one of the first terminal (120) or the second terminal (130) may be a device that performs machine type communication (MTC) and may not be carried by the user. Each of the first terminal (120) and the second terminal (130) may be referred to as 'user equipment (UE)', 'mobile station', 'subscriber station', 'customer premises equipment (CPE)', 'remote terminal', 'wireless terminal', 'electronic device', or 'user device' or other terms having an equivalent technical meaning.

[0042] The base station (110), the first terminal (120), and the second terminal (130) can transmit and / or receive wireless signals in a millimeter wave (mmWave) band (e.g., 28 GHz, 30 GHz, 38 GHz, 60 GHz). At this time, to improve channel gain, the base station (110), the first terminal (120), and / or the second terminal (130) can perform beamforming.

[0043] Beamforming may include transmitting beamforming and / or receiving beamforming. That is, the base station (110), the first terminal (120), and / or the second terminal (130) may give directivity to the transmitted signal or the received signal. To give directivity to the received signal, the base station (110) and / or the terminals (120, 130) may select serving beams (112, 113, 121, 131) through a beam search or beam management procedure. After the serving beams (112, 113, 121, 131) are selected, subsequent communication may be performed through a resource that is in a quasi-co-located (QCL) relationship with the resource that transmitted the serving beams (112, 113, 121, 131).

[0044] The base station (110), the first terminal (120), and the second terminal (130) of the present disclosure may each be a transmitting apparatus, a transmitting node, a receiving apparatus, and / or a receiving node. For example, the base station (110) may transmit a radio frequency (RF) signal to the first terminal (120). The base station (110) may receive an RF signal from the first terminal (120). As another example, the first terminal (120) may transmit an RF signal to the base station (110) or the second terminal (130). The first terminal (120) may receive an RF signal from the base station (110) or the second terminal (130).

[0045] FIG. 2 is a drawing for explaining the structure of a terminal according to embodiments.

[0046] Referring to FIG. 2, a terminal (200) according to embodiments may include a transceiver (transmitter / receiver) (210), a memory (220), and / or a processor (230). Although the present disclosure describes the terminal (200) as including a transceiver (210), a memory (220), and / or a processor (230), this is merely an example. For example, the terminal (200) may include additional components other than the transceiver (210), the memory (220), and the processor (230).

[0047] According to the embodiments, the transceiver (210), memory (220), and processor (230) may each be implemented or formed as separate chips. However, this is merely an example, and the transceiver (210), memory (220), and / or processor (230) may be implemented or formed as a single chip.

[0048] According to embodiments, the transceiver (210) may include at least one transmitter and / or at least one receiver. For example, the transceiver (210) may include an RF transmitter for amplifying and up-converting the frequency of a transmitted signal. The transceiver (210) may include an RF receiver for down-converting the frequency of a received signal and amplifying low-noise.

[0049] The configurations of the transceiver (210) described in this disclosure are merely examples and the configuration of the transceiver (210) is not limited to an RF transmitter and an RF receiver. For example, the transceiver (210) may further include a coupler to ensure isolation between the RF transmitter and the RF receiver.

[0050] According to the embodiments, the transceiver (210) can transmit or receive a signal to or from the processor (230). For example, the transceiver (210) can transmit or deliver an RF signal received through a wireless communication channel to or from the processor (230). The transceiver (210) can receive or receive an RF signal from or from the processor (230).

[0051] According to the embodiments, the transceiver (210) may be referred to as a UE transmitter or a UE receiver.

[0052] According to embodiments, the transceiver (210) may transmit a signal to a base station (e.g., base station (110) of FIG. 1) or a network entity (e.g., an access and mobility management function (AMF) entity) or receive a signal from a base station or a network entity. In embodiments, the transmitted or received signal may include control signals and data.

[0053] According to embodiments, the memory (220) may include or store programs and data necessary for the operations of the terminal (200). For example, the memory (220) may be a non-transitory memory, and a program stored in the non-transitory memory may be organically coupled with the hardware configuration of the terminal (200) (e.g., a processor (230) or a transceiver (210)). The memory (220) may store control information or data including signals obtained by the terminal (200). In embodiments, the memory (220) may include a read-only memory (ROM), a random access memory (RAM), a hard disk, a CD-ROM, a DVD, and / or a storage medium.

[0054] According to the embodiments, the processor (230) may include one processor or a plurality of processors. For example, the processor (230) may include a communication processor. For example, the processor (230) may include a communication processor and / or an application processor.

[0055] According to embodiments, the processor (230) can control a series of processes performed by the terminal (200). For example, the transceiver (210) can receive a data signal containing control information transmitted by a base station or network entity. The processor (230) can process the received control signal and data signal.

[0056] The term processor in the present disclosure may be replaced with various terms referring to a configuration that executes or performs operations of the terminal (200). For example, the processor may be replaced with a controller or a computing circuit.

[0057] The terminal (200) of the present disclosure may correspond to the first terminal (120) and / or the second terminal (130) of FIG. 1.

[0058] FIG. 3 is a diagram illustrating the structure of a network entity (or base station) according to embodiments.

[0059] Referring to FIG. 3, a network entity (300) according to embodiments may include a transceiver (transmitter / receiver) (310), a memory (320), and / or a processor (330). Although the present disclosure describes the network entity (300) as including a transceiver (310), a memory (320), and / or a processor (330), this is merely an example. For example, the network entity (300) may include additional components other than the transceiver (310), the memory (320), and the processor (330). The network entity (300) may represent network functions included in a base station or other core network.

[0060] According to the embodiments, the transceiver (310), memory (320), and processor (330) may each be implemented or formed as separate chips. However, this is merely an example, and the transceiver (310), memory (320), and / or processor (330) may be implemented or formed as a single chip.

[0061] According to embodiments, the transceiver (310) may include at least one transmitter and / or at least one receiver. For example, the transceiver (310) may include an RF transmitter for amplifying and up-converting the frequency of a transmitted signal. The transceiver (310) may include an RF receiver for down-converting the frequency of a received signal and amplifying low-noise.

[0062] The configurations of the transceiver (310) described in this disclosure are merely examples and are not limited to an RF transmitter and an RF receiver. For example, the transceiver (310) may further include a coupler to ensure isolation between the RF transmitter and the RF receiver.

[0063] According to the embodiments, the transceiver (310) can transmit or receive a signal to or from the processor (330). For example, the transceiver (310) can transmit or deliver an RF signal received through a wireless communication channel to or from the processor (330). The transceiver (310) can receive or receive an RF signal from the processor (230).

[0064] According to the embodiments, the transceiver (310) may be referred to as a network entity transmitter or a network entity receiver.

[0065] According to embodiments, the transceiver (310) may transmit a signal to the terminal (200) or another network entity or receive a signal from the terminal (200) or another network entity. In embodiments, the transmitted or received signal may include control signals and data.

[0066] According to embodiments, the memory (320) may contain programs and data necessary for the operations of the network entity (300). For example, the memory (320) may be a non-transitory memory, and a program stored in the non-transitory memory may be organically coupled with the hardware configuration of the network entity (300) (e.g., a processor (330) or a transceiver (310)). The memory (320) may store control information or data including signals obtained by the network entity (300). In embodiments, the memory (320) may include read-only memory (ROM), random access memory (RAM), a hard disk, a CD-ROM, a DVD, and / or storage media.

[0067] According to the embodiments, the processor (330) may include one processor or a plurality of processors. For example, the processor (330) may include a communication processor. For example, the processor (330) may include a communication processor and / or an application processor.

[0068] According to embodiments, the processor (330) can control a series of processes performed by the network entity (300). For example, the transceiver (310) can receive a data signal containing control information transmitted by a terminal or another network entity. The processor (330) can process the received control signal and data signal.

[0069] The term processor in the present disclosure may be replaced with various terms referring to a configuration that executes or performs operations of a network entity (300). For example, processor may be replaced with a controller or a computing unit.

[0070] The network entity (300) of the present disclosure may correspond to the base station (110) of FIG. 1.

[0071] The device described in FIGS. 2 and 3 may correspond to a device of a transmitting end or a receiving end. A terminal or network entity according to embodiments of the present disclosure may be a transmitting end when it is a transmitting end, and may be a receiving end when the terminal or network entity is a receiving end.

[0072] In the following, the transmitting end and the receiving end may each refer to the terminal or base station described in FIGS. 1 to 3 above.

[0073] The terminal or base station described in FIGS. 1 to 3 can perform operations related to the transmission and reception of setting information related to the measurement and reporting of a signal, and operations related to the measurement and reporting based on said setting information.

[0074] FIG. 4 is a drawing for explaining a beam sweeping operation method of a base station according to embodiments of the present disclosure.

[0075] Referring to (a) and (b) in FIG. 4, a first system (410) and a second system (420) for transmitting a beam to a user terminal (UE_0, UE_1, UE_2, UE_3) by a base station (or an antenna panel capable of transmitting a beam) are shown.

[0076] In the case of the first system (410), a single antenna panel cannot simultaneously transmit beams of different directions. For example, a single antenna panel can transmit a first beam to UE_0 using a first time resource, transmit a second beam to UE_1 using a second time resource, transmit a third beam to UE_2 using a third time resource, and transmit a fourth beam to UE_3 using a fourth time resource. Here, the first to fourth time resources represent different time resources. That is, since an antenna panel cannot transmit multiple beams of different directions using the same time resource, the antenna panel can transmit one beam per unit time resource, and a large amount of time resources may be consumed to transmit all multiple beams.

[0077] On the other hand, in the case of the second system (420), a single antenna panel can simultaneously transmit beams of different directions. For example, a single antenna panel can transmit a first beam to UE_0, a second beam to UE_1, a third beam to UE_2, and a fourth beam to UE_3 using a first time resource. Here, the frequency bands in which the first to fourth beams are transmitted can be allocated differently. In the second system (420), since the antenna panel can transmit multiple beams of different directions using the same time resource, the size of the time resource required to transmit all beams may be smaller compared to the first system (410).

[0078] In various embodiments, the first system (410) and the second system (420) may include an analog beamforming system. The second system (420) may be a system with antenna-specific time delays applied.

[0079] FIG. 5 is a diagram illustrating a beam sweeping method for transmitting a synchronization signal block (SSB) of a base station according to embodiments of the present disclosure.

[0080] Referring to (a) in FIG. 5, a beam sweeping operation method (first method) for SSB transmission by a base station in the first system (410) of FIG. 4 is illustrated. In the first method, the base station can transmit SSB 0 using the same beam (e.g., Beam 0) for each component carrier (CC) representing a frequency band in the same time resource. Specifically, the base station can transmit SSB 0 as Beam 0 in each of the first CC (CC 1) to the fourth CC (CC 4) using the first time resource, and transmit SSB 1 as Beam 1 in the first CC (CC 1) to the fourth CC (CC 4) using the second time resource. For 16 beams with different directions (Beam 0 to Beam 15), the base station can use 16 unit time resources to transmit SSB using Beam 0 to Beam 15 for each CC. At this time, the unit time resource may represent the time resource required to transmit SSB with a single beam.

[0081] Referring to (b) in FIG. 5, a beam sweeping operation method (second method) for SSB transmission by a base station in the second system (420) of FIG. 4 is illustrated. In the second method, the base station can transmit SSB 0 using different beams for each component carrier (CC) representing a frequency band in the same time resource. Specifically, the base station can transmit SSB 0 using beam 0, beam 1, and beam 2 in the first CC (CC 1) to the third CC (CC 3), respectively, using the first time resource. The base station can transmit SSB 0 to beam 0 in the first CC of the first time resource, transmit SSB 0 to beam 1 in the second CC, and transmit SSB 0 to beam 2 in the third CC. Likewise, the base station can transmit SSB 1 to beam 3, beam 4, and beam 5 in the first CC (CC 1) to the third CC (CC 3), respectively, using the second time resource. Additionally, the base station may use the third time resource to transmit SSB 2 to beams 6, 7, 8, and 9, respectively, in the first CC (CC 1) to the fourth CC (CC 4). According to the second method, five unit time resources may be required for the base station to transmit SSB 0 to SSB 4 to beams 0 to 15 in the first CC to the fourth CC. A unit time resource may represent the time resources required to transmit an SSB in a single beam.

[0082] Referring to (c) in FIG. 5, a beam sweeping operation method (third method) for SSB transmission by a base station in the second system (420) of FIG. 4 is illustrated. In the second method, the base station can transmit SSB 0 using different beams for each component carrier (CC) representing a frequency band in the same time resource. Specifically, the base station can transmit SSB 0 using beam 0, beam 1, beam 2, and beam 3 in the first CC (CC 1) to the fourth CC (CC 4), respectively, using the first time resource. The base station can transmit SSB 0 to beam 0 in the first CC of the first time resource, transmit SSB 0 to beam 1 in the second CC, transmit SSB 0 to beam 2 in the third CC, and transmit SSB 0 to beam 3 in the fourth CC. Likewise, the base station can transmit SSB 1 to Beam 4, Beam 5, Beam 6, and Beam 7, respectively, in the first CC (CC 1) to the fourth CC (CC 4) using the second time resource. Additionally, the base station can transmit SSB 2 to Beam 8, Beam 9, Beam 10, and Beam 11, respectively, in the first CC (CC 1) to the fourth CC (CC 4) using the third time resource. According to the third method, four unit time resources may be required for the base station to transmit SSB 0 to SSB 3 to Beams 0 to 15 in the first CC to the fourth CC. A unit time resource may represent the time resources required to transmit an SSB in a single beam.

[0083] In various embodiments, the base station may perform beam sweeping to transmit SSBs in a manner different from (a), (b), and (c) of FIG. 5. The number of beams operated by the base station, the number of SSBs transmitted by the base station, the number of component carriers, etc., may be set differently from those shown in FIG. 5.

[0084] Meanwhile, in the present disclosure, a terminal (UE) can measure an SSB transmitted by a base station and report the measurement result to the base station. In relation to such measurement and reporting operations of the terminal, the base station may transmit RRC configuration information to the terminal, and the terminal may measure an SSB based on the received configuration information and report the measurement result to the base station.

[0085] In the case of (a) in Fig. 5, since the base station transmits the SSB using all beams in one CC (or cell), the terminal can be configured to measure and report the SSB received in the corresponding CC.

[0086] However, in the case of (b) and (c) in FIG. 5, since the base station transmits SSB using different beams for each of the multiple CCs within the same time resource, the terminal (UE) needs to be configured to measure the SSB transmitted through the multiple CCs and report the measurement results to the base station. That is, the terminal can be configured to measure and report the SSB received through different CCs.

[0087] A terminal according to embodiments of the present disclosure can measure SSBs received by different beams for a plurality of CCs (or cells) in the same time resource and report the measurement results to a base station.

[0088] Hereinafter, setting information related to the SSB measurement operation and reporting operation of a terminal according to embodiments of the present disclosure will be described.

[0089] FIG. 6 illustrates the transmission and reception operation of a user terminal and a base station according to embodiments of the present disclosure.

[0090] Referring to FIG. 6, the terminal (610) receives system information from the base station (gNB) (620) and can perform a cell reselection procedure based on the received system information. The cell reselection procedure may include the terminal measuring the quality of the signal received from the base station and reporting the measurement result.

[0091] In step 632, the terminal (610) may receive a plurality of system information from the base station (620), which includes group information regarding the SSBs of the serving cell(s) and neighbor cell(s). The system information may be broadcast from the base station. The plurality of system information may include a system information block (SIB) 1 containing information about the terminal's serving cell, an intra-frequency neighbor cell containing information about neighbor cells with the same frequency band as the serving cell, and an inter-frequency neighbor cell containing information about neighbor cells with a different frequency band as the serving cell. SIB 1 contains group information for indicating a group of serving cells. The group information may indicate a group of beams for transmitting synchronization signal blocks (SSBs) transmitted from the serving cell. For example, referring to FIG. 5(c), Beams 0 through 15 according to the beam sweeping operation may be the same group. At this time, the first component carrier (or cell) (CC1), the second component carrier (CC2), the third component carrier (CC3), and the fourth component carrier (CC4) may be in the same group. As another example, in FIG. 5(c), Beam 0, Beam 1, Beam 4, Beam 5, Beam 8, Beam 9, Beam 12, and Beam 13 according to the beam sweeping operation may be in the same group. At this time, the first component carrier (or cell) (CC1) and the second component carrier (CC2) may be in the same group. That is, the group information may represent a group of component carriers (or cells), SSBs, or beams operated by the base station, and the terminal may identify a group of component carriers, a group of SSBs, or a group of beams based on the group information. The terminal may measure a signal and generate a measurement result based on the identified group.

[0092] In step 634, the terminal (610) can perform a cell reselection procedure based on group information. Specifically, the terminal can measure SSBs based on group information and transmit a report on the measured results to the base station. For example, the terminal can measure SSBs received through cells (or component carriers) belonging to the same group and generate a report on the measured results and transmit it to the base station.

[0093] In various embodiments, group information included in each of the plurality of system information may represent an index for the group to which the cell set by the system information belongs. For example, if the first system information includes information about a serving cell of a terminal, the group information included in the first system information may represent a group index for the serving cell.

[0094] In various embodiments, the cell reselection procedure of the terminal may be a procedure performed in an inactive or idle mode.

[0095] FIG. 7 illustrates system information according to embodiments of the present disclosure.

[0096] This disclosure describes fields among those shown in the drawings that are relevant to the embodiments of this disclosure, and descriptions of fields of low relevance may be omitted. In the case of fields where descriptions are omitted, 3GPP (3rd The contents of standard technical specification 38.311 of the generation partnership project may be referenced.

[0097] Referring to FIG. 7, SIB1 may include information about the serving cell of the terminal. Group information included in SIB1 (e.g., ssb-SweepingGroupIndex) may represent a group index for the serving cell. Additionally, the group information may represent a group for an SSB or beam that the base station transmits through the serving cell.

[0098] The cellSelectionInfo included in SIB1 may contain information related to cell selection associated with the serving cell.

[0099] SIB3 may include group information for neighbor cells (intra-frequency neighbor cells) that have the same frequency band (or component carrier) as the terminal's serving cell. Neighbor cells that have the same frequency band as the serving cell may be operated by a base station different from the base station operating the serving cell. The group information included in SIB3 (e.g., ssb-SweepingGroupIndex) may represent the group index of neighbor cells in the same frequency band (intra-frequency) as the serving cell.

[0100] The intraFreqNeighCellList included in SIB3 can represent a list of neighbor cells in the same frequency band as the serving cell. The intraFreqNeighCellInfo can contain information about neighbor cells in the same frequency band as the serving cell.

[0101] SIB4 may include information about neighbor cells with different frequency bands from the terminal's serving cell. Neighbor cells with different frequency bands from the serving cell may be operated by the same base station or a different base station as the base station operating the serving cell. Group information included in SIB4 (e.g., ssb-SweepingGroupIndex) may indicate the group index of neighbor cells with different frequency bands from the serving cell.

[0102] The interFreqNeighCellList included in SIB4 can represent a list of neighbor cells in a different frequency band from the serving cell. The interFreqNeighCellInfo can include group information for neighbor cells in a different frequency band from the serving cell.

[0103] Based on the group information contained in SIB1, SIB3, and SIB4, the terminal can identify group information for the terminal's serving cell, neighboring cells with the same frequency band as the serving cell, and neighboring cells with a different frequency band as the serving cell, respectively. For example, if the group indices contained in SIB1, SIB3, and SIB4 are identical to each other, the terminal can identify that each cell belongs to the same group. If the group indices are different, the terminal can identify that each cell belongs to a different group.

[0104] Based on group information, the terminal can measure the SSB transmitted through cells (or component carriers) belonging to the same group and transmit a report on the measurement result to the base station. Accordingly, in a system where the base station simultaneously transmits SSB using different beams for each cell (Fig. 5 (b) or (c)), the terminal can measure the SSB received through multiple cells and report the result.

[0105] In various embodiments, if the terminal includes neighbor cells or serving cells that have the same frequency band (intra frequency) as the serving cell, the terminal can identify that the priority of the cells in relation to the cell reselection procedure is equal for the cells belonging to the group.

[0106] In various embodiments, when the terminal includes only neighboring cells that are different in frequency band (inter frequency) from the serving cell, the terminal can identify priorities related to cell reselection based on the priorities of the cells belonging to the group.

[0107] In various embodiments, the names of the parameters shown in FIG. 7 may be applied differently, and the identity or similarity of the parameters may be determined based on the content of the information the parameters possess and their use.

[0108] In various embodiments, the inclusion or connection relationships between the parameters shown in FIG. 7 are not limited to those shown in FIG. 7, and the embodiments of the present disclosure do not exclude embodiments in which the parameters have inclusion or connection relationships different from those shown in FIG. 7.

[0109] FIG. 8 illustrates the transmission and reception operation of a user terminal and a base station according to embodiments of the present disclosure.

[0110] Referring to FIG. 8, the terminal (810) receives a radio resource control (RRC) message from a base station (gNB) (820) and can perform a cell reselection procedure based on the information contained in the received message.

[0111] In step 832, the terminal (810) may receive an RRC message from the base station (820) containing updated group information regarding the SSBs of the serving cell(s) and neighbor cell(s). The RRC message may include an RRC release message. The RRC release message may include updated group information for the terminal's serving cell, updated group information for neighbor cells (Intra-frequency neighbor cells) that have the same frequency band as the serving cell, and updated group information for neighbor cells (Inter-frequency neighbor cells) that have a different frequency band from the serving cell. The updated group information may indicate an updated group of beams associated with the synchronization signal block (SSB) transmitted from the serving cell.

[0112] In various embodiments, a base station may transmit group information regarding cells by broadcasting system information to a plurality of terminals, and subsequently transmit updated group information regarding cells by transmitting an RRC message to a specific terminal. The terminal may update the group information identified based on the system information based on the RRC message. For example, if the first cell, the second cell, the third cell, and the fourth cell are set as the first group based on the group information included in the system information, only the first cell and the second cell may be set as the first group and the third cell and the fourth cell as the second group based on the updated group information included in the RRC message. That is, the group set by the system information may be updated per terminal by the RRC message.

[0113] In various embodiments, the RRC message may include an RRC release message, an RRC reset message, an RRC connection establishment message, etc.

[0114] In various embodiments, the base station receives a report from the terminal regarding the measurement results of the SSB and can set up updated group information for the terminal based on the report. For example, if the highest quality signal is measured in a first cell among the grouped cells, the base station can set up an updated group for the terminal to measure only the cells close to the first cell. As another example, if the beam with the highest quality signal is measured in a first cell, the base station can set up an updated group for the terminal to measure only the cells scheduling the surrounding beams of that beam.

[0115] In step 834, the terminal (810) may perform a cell reselection procedure based on updated group information. Specifically, the terminal may measure SSBs based on updated group information and transmit a report on the measurement results to the base station. For example, the terminal may measure SSBs received through cells (or component carriers) belonging to the same updated group and generate a report on the measurement results and transmit it to the base station.

[0116] In various embodiments, step 832 may be performed multiple times to update group information.

[0117] In various embodiments, the cell reselection operation of the terminal can be performed in the terminal's inactive or idle mode.

[0118] FIG. 9 illustrates information included in a radio resource control (RRC) release message according to embodiments of the present disclosure.

[0119] This disclosure describes fields among those shown in the drawings that are relevant to the embodiments of this disclosure, and descriptions of fields of low relevance may be omitted. In the case of fields where descriptions are omitted, 3GPP (3rd The contents of standard technical specification 38.311 of the generation partnership project may be referenced.

[0120] Referring to FIG. 9, the RRC release message may include updated group information for the cell (or component carrier).

[0121] The updated group information may include a parameter for setting a new group index for a cell (e.g., SweepingGroupIndexToAddModList) (912) and / or a parameter for releasing a previously set group index (e.g., SweepingGroupIndexToReleaseList) (918).

[0122] The SweepingGroupIndexToAddModList field (912) may include a cell identifier (e.g., physCellId or servCellId, etc.) (914) and a group index (ssb-SweepingGroupIndex) (916). The SweepingGroupIndexToAddModList field (912) may include an updated group index for the cell indicated by the cell identifier. Thus, the terminal can update the group index for the cell indicated by the cell identifier.

[0123] The SweepingGroupIndexToReleaseList field (918) may include a cell identifier (e.g., physCellId or servCellId, etc.) (920). Thus, the group index for the cell indicated by the cell identifier can be released.

[0124] In various embodiments, the cell identifier may include a physCellId, which is an identifier for identifying a base station; a servCellId, which is an identifier for identifying a cell; or other fields capable of identifying the frequency band of a specific cell. Regarding the relationship between group information or updated group information and the cell identifier, the cell identifier may be positioned at a higher, equivalent, or lower level than the group information or updated group information to indicate which cell the group information or updated group information pertains to.

[0125] The RRC release message includes a CellReselectionPriorities field (or parameter), and CellReselectionPriorities may include information regarding the priority for cell reselection of the terminal. CellReselectionPriorities may include updated group information for the cell (or component carrier).

[0126] Based on updated group information, the terminal can measure the SSB transmitted through cells (or component carriers) belonging to the same updated group and transmit a report on the measurement result to the base station.

[0127] In various embodiments, the mode of the terminal can be changed from an RRC connection mode to an inactive mode or an idle mode via an RRC release message, and the terminal can measure the SSB based on updated group information received via an RRC release message in the changed mode state.

[0128] In various embodiments, if the terminal includes a cell belonging to the same updated group as a serving cell or a neighbor having the same frequency band (intra frequency) as the serving cell, the terminal can identify that the priority regarding the cell reselection procedure for the cells belonging to the updated group is equal.

[0129] In various embodiments, if the terminal includes only neighboring cells that are different in frequency band (inter frequency) from the serving cell, the terminal can identify priorities related to cell reselection based on priority for the cells belonging to the same updated group.

[0130] In various embodiments, the names of the parameters shown in FIG. 9 may be applied differently, and parameter identity or similarity may be determined based on the content of the information the parameters possess and their use.

[0131] In various embodiments, the inclusion or connection relationships between the parameters shown in FIG. 9 are not limited to those shown in FIG. 9, and the embodiments of the present disclosure do not exclude embodiments in which the parameters have inclusion or connection relationships different from those shown in FIG. 9.

[0132] FIG. 10 illustrates the transmission and reception operation of a user terminal and a base station according to embodiments of the present disclosure.

[0133] Referring to FIG. 10, the terminal (1010) receives a radio resource control (RRC) message from a base station (gNB) (1020) and can perform measurement of the SSB and report the measurement results based on the information contained in the received message.

[0134] In step 1032, the terminal (1010) may receive an RRC message from the base station (1020) containing group information regarding the SSBs of the serving cell(s) and neighbor cell(s). The RRC message may include configuration information (e.g., measObject) related to measurements in the terminal's RRC connection state. The base station may transmit the RRC message to a specific terminal. The configuration information related to the terminal's measurements may include group information for the terminal's serving cell, group information for neighbor cells (Intra-frequency neighbor cells) that have the same frequency band as the serving cell, and group information for neighbor cells (Inter-frequency neighbor cells) that have a different frequency band from the serving cell. The group information may represent groups of beams for the synchronization signal blocks (SSBs) transmitted from the serving cell. The base station may transmit group information for the cells by transmitting an RRC message to the terminal in the RRC connection state.

[0135] In various embodiments, the terminal may receive multiple RRC messages containing configuration information. The terminal may update previously received group information based on newly received RRC messages.

[0136] In step 1034, the terminal may receive configuration information from the base station for reporting measurement results. The configuration information for reporting measurement results may include the type and content of information included in the report.

[0137] In step 1036, the terminal (1010) can measure the SSB based on the configuration information received in steps 1032 and 1034 and generate a report on the measurement. The terminal (1010) can evaluate whether the measurement result meets the reporting criteria and, based on the evaluation, transmit the report on the measurement result to the base station.

[0138] In step 1038, the terminal (1010) may transmit a report of the measured result to the base station. The terminal may measure SSBs received through cells (or component carriers) belonging to the same group, and generate a report of the measured result and transmit it to the base station.

[0139] In various embodiments, step 1032 or step 1034 may be performed multiple times to update the configuration information. The configuration information previously received by the terminal may be updated by the new configuration information.

[0140] In various embodiments, steps 1032 through 1038 may represent operations performed in the RRC connected mode of the terminal (1010).

[0141] In various embodiments, the base station receives a report from the terminal regarding the measurement results of the SSB and can set up updated group information for the terminal based on the report. For example, if the highest quality signal is measured in a first cell among the grouped cells, the base station can set up an updated group for the terminal to measure only the cells close to the first cell. As another example, if the beam with the highest quality signal is measured in a first cell, the base station can set up an updated group for the terminal to measure only the cells scheduling the surrounding beams of that beam.

[0142] FIG. 11 illustrates setting information related to the measurement of a user terminal according to embodiments of the present disclosure.

[0143] This disclosure describes fields among those shown in the drawings that are relevant to the embodiments of this disclosure, and descriptions of fields of low relevance may be omitted. In the case of fields where descriptions are omitted, 3GPP (3rd The contents of standard technical specification 38.311 of the generation partnership project may be referenced.

[0144] Referring to FIG. 11, configuration information for a measurement of a terminal (e.g., MeasObjectNR) may include group information (e.g., ssb-SweepingGroupIndex) (1112) for a cell (or component carrier) of the terminal. The group information may represent a group for a serving cell or neighboring cells. The group information may represent a group for an SSB or beam that the base station transmits through the serving cell.

[0145] MeasObjectNR includes cellsToAddModList for setting the cells to be measured by the terminal, and CellsToAddMod included in cellsToAddModList may include a cell identifier (e.g., physCellId or servCellId) and a group index (ssb-SweepingGroupIndex) (1112) for the corresponding cell. Thus, the terminal can identify group information for the cell from MeasObjectNR. The terminal can identify cells with the same group index (1112) as the same group.

[0146] In various embodiments, the cell identifier may include a field that can identify a specific cell's frequency band, such as physCellId, which is an identifier for identifying a base station, a field that can identify a cell, or other fields. Regarding the relationship between group information or updated group information and the cell identifier, the cell identifier may be positioned at a higher, equivalent, or lower level than the group information or updated group information to indicate which cell the group information or updated group information pertains to. For example, in FIG. 11, servCellId (not shown) is positioned at a lower level of MessObjectNR and servCellId (not shown) is positioned at a higher level than the group information (ssb-SweepingGroupIndex) (1112), so that the terminal can identify which phyCellId and servCellId the group information (1112) pertains to. Specifically, the terminal can identify which cell (servCellId) of which base station (phyCellId) the group information (1112) is for.

[0147] In various embodiments, the names of the parameters shown in FIG. 11 may be applied differently, and parameter identity or similarity may be determined based on the content of the information the parameters possess and their use.

[0148] In various embodiments, the inclusion or connection relationships between the parameters shown in FIG. 11 are not limited to those shown in FIG. 11, and the embodiments of the present disclosure do not exclude embodiments in which the parameters have inclusion or connection relationships different from those in FIG. 11.

[0149] FIG. 12 illustrates information related to the measurement results of a user terminal according to embodiments of the present disclosure.

[0150] This disclosure describes fields among those shown in the drawings that are relevant to the embodiments of this disclosure, and descriptions of fields of low relevance may be omitted. In the case of fields where descriptions are omitted, 3GPP (3rd The contents of standard technical specification 38.311 of the generation partnership project may be referenced.

[0151] When a terminal identifies group information for cells based on the aforementioned embodiments, the terminal can measure the SSB transmitted through the cells based on the group information and generate a measurement result for the SSB.

[0152] In various embodiments, a first measurement result of a terminal (e.g., measResultServingCell) may include information indicating the SSB with the best signal quality among the transmitted SSBs based on the terminal's serving cell and other cells with the same group index as the serving cell, and a measurement value for the said SSB (e.g., RSRP (reference signal received power), etc.).

[0153] In various embodiments, the second measurement result of the terminal (e.g., measResultBestNeighCell) may include information indicating the SSB with the best signal quality among the SSBs transmitted based on the terminal's serving cell and group index and other cells, and a measurement value for the said SSB (e.g., RSRP, etc.).

[0154] In various embodiments, as shown in FIG. 12(a), the measurement result of the terminal (e.g., MeasResultNR) may include a cell identifier (e.g., physCellID or servCellId) and a measurement result (measResult) for the corresponding cell. In this case, the measurement result may further include a field (e.g., rsIndexResults) to indicate that the included result is a measurement result for a cell associated with the SSB with the best signal quality in the group. That is, if the measurement result is a measurement result for a cell associated with the SSB with the best signal quality in the group, the terminal may report to the base station by including a field to indicate that the measurement result is a measurement result for a cell associated with the SSB with the best signal quality in the measurement result.

[0155] In various embodiments, rsIndexResults may include index information (e.g., SSB-index) indicating the SSB with the best signal quality in the group and RSRP (or RSRP, SINR, etc.) information corresponding to the SSB.

[0156] In various embodiments, the terminal may generate a measurement result (e.g., MeasResultNR) per cell. For example, in FIG. 12(a), which cell the measurement result (MeasResultNR) pertains to may be identified through a servCellId (not shown) located at a higher level than MeasResultNR. Specifically, which cell the measurement result of MeasResultNR pertains to may be identified through a physCellId for identifying the base station and a servCellId for identifying the cell (or component carrier). For example, in FIG. 12(a), if the physCellId located at a lower level than MeasResultNR is 1 and the servCellId (not shown) located at a higher level than MeasResultNR is 2, then MeasResultNR may include the result measured in a cell with a servCellId of 2 in a base station with a physCellId of 1.

[0157] In various embodiments, the cell identifier may include a field that identifies a specific cell, such as physCellId, which is an identifier for identifying a base station; a field that identifies a cell (or component carrier), such as servCellId, which is an identifier for identifying a cell; or other fields that can identify the frequency band of a specific cell. Regarding the relationship between the field containing the measurement result and the cell identifier, the cell identifier may be positioned at a higher, equivalent, or lower level than the field representing the measurement result to indicate which cell the measurement result pertains to.

[0158] In various embodiments, as shown in FIG. 12(b), the measurement result of the terminal (e.g., MeasResultNR) may include a cell identifier (e.g., servCellID) (1214) for the SSB with the best signal quality among the cells belonging to the group. That is, the first cell identifier included in MeasResultNR may represent the cell for the SSB with the best signal quality in the group. Meanwhile, a second cell identifier (not shown) located at a higher level than MeasResultNR may represent the cell for the measurement result included in MeasResultNR. Thus, if the second cell identifier located at a higher level than MeasResultNR is 1 and the first cell identifier included in MeasResultNR is 2, MeasResultNR includes the measurement result for the cell with cell identifier 1, and the cell with cell identifier 2 may be identified as the cell for the SSB with the best signal quality in the group. MeasResultNR may include the measurement result for the cell and / or information about the SSB with the best signal quality in the group.

[0159] In various embodiments, as shown in FIG. 12(c), the measurement results of the terminal (e.g., MeasResultServMOList) may include only the measurement results for the terminal's serving cell and the measurement results for neighboring cells. For example, among a plurality of measurement results (e.g., MeasResultServMO), the terminal may report to the base station only the measurement results for cells in the same group as the terminal's serving cell and the measurement results for cells in a different group from the terminal's serving cell. That is, even if measurements for a plurality of cells (or component carriers) are set through measObject, the terminal may report to the base station only the measurement results for some cells related to the serving cell or neighboring cells. Alternatively, the terminal may report to the base station only the measurement results for some cells based on group information. For example, the terminal may report to the base station only the measurement results for cells belonging to the same group as the serving cell and the measurement results for cells belonging to a different group from the serving cell.

[0160] In various embodiments, the MeasResultServMO field (1216) may include the MeasResultNR field.

[0161] In various embodiments, the names of the parameters shown in FIG. 12 may be applied differently, and parameter identity or similarity may be determined based on the content of the information the parameters possess and their use.

[0162] In various embodiments, the inclusion or connection relationships between the parameters shown in FIG. 12 are not limited to those shown in FIG. 12, and the embodiments of the present disclosure do not exclude embodiments in which the parameters have inclusion or connection relationships different from those in FIG. 12.

[0163] FIG. 13 illustrates the exchange of group information between base stations according to embodiments of the present disclosure.

[0164] Referring to FIG. 13, information regarding a group of cells (or component carriers) is exchanged between a first base station and a second base station based on an Xn interface.

[0165] For example, a first base station operating a first system as shown in FIG. 5(b) and a second base station operating a second system as shown in FIG. 5(c) can transmit and receive group indices of the cells they each operate. Accordingly, the first base station can identify that the group index of the cells operated by the second base station is 1, and the second base station can identify that the group index of the cells operated by the first base station is 2. Cells with the same group index can be identified as the same group. In addition, SSBs transmitted through cells with the same group index can be identified as the same group. In addition, beams related to SSBs transmitted through cells with the same group index can be identified as the same group.

[0166] FIG. 14 illustrates the operation of exchanging group information between base stations according to embodiments of the present disclosure.

[0167] Referring to FIG. 14, the first base station (1410) can exchange group information regarding the SSB of the serving cell(s) and neighboring cell(s) with the second base station (1420) through the Xn interface. Thus, each base station can identify the group index for the cells operated by the other base station. And, the first base station can set a first group index different from the second group index for the cells operated by the first base station by referring to the second group index for the cells of the second base station.

[0168] In various embodiments, the first base station may receive group information regarding neighbor cells of the second base station having the same frequency band as the terminal's serving cell and group information regarding neighbor cells of the second base station having a different frequency band as the serving cell based on the Xn interface. In various embodiments, group information regarding the serving cell(s) and neighbor cells(s) may be included in an Xn setup request message and / or an Xn setup response message.

[0169] In various embodiments, group information regarding serving cell(s) and neighbor cell(s) may be included in the NG-RAN NODE CONFIGURATION UPDATE message and / or the NG-RAN NODE CONFIGURATION UPDATE ACKNOWLEDGE message.

[0170] FIG. 15 illustrates transmission and reception information of a base station according to embodiments of the present disclosure.

[0171] This disclosure describes fields among those shown in the drawings that are relevant to the embodiments of this disclosure, and descriptions of fields of low relevance may be omitted. In the case of fields where descriptions are omitted, 3GPP (3rd The contents of standard technical specification 38.423 of the generation partnership project may be referenced.

[0172] Referring to FIG. 15, group information (e.g., ssb-SweepingGroupIndex) (1512) of cells (or component carriers) operated by a base station may be included in the Xn setup request message and the Xn setup response message. Alternatively, group information (1514, 1516) may be included in the NG-RAN NODE CONFIGURATION UPDATE message and / or the NG-RAN NODE CONFIGURATION UPDATE ACKNOWLEDGE message.

[0173] Serve Cell Information NR represents a field containing configuration information for cells operated by a base station. Serve Cell Information NR may include group information (or group index) of cells (or component carriers) operated by the base station.

[0174] In various embodiments, the names of the parameters shown in FIG. 15 may be applied differently, and parameter identity or similarity may be determined based on the content of the information the parameters possess and their use.

[0175] In various embodiments, the inclusion or connection relationships between the parameters shown in FIG. 15 are not limited to those shown in FIG. 15, and the embodiments of the present disclosure do not exclude embodiments in which the parameters have inclusion or connection relationships different from those in FIG. 15.

[0176] According to embodiments of the present disclosure, in a system in which a base station transmits an SSB using different beams for different frequency bands (or cells) in the same time resource, a terminal can measure the transmitted SSB and report the measurement result.

[0177] Although the embodiments of the present disclosure have been described in detail to explain the technical concept of the present disclosure, the individual operations constituting each embodiment may be changed in order or parts of which may be omitted. Accordingly, an embodiment in which the order of operations is changed or some operations are omitted may be understood as having been described by the present disclosure. Furthermore, the embodiments of the present disclosure may be modified in various ways according to the content described in the present disclosure.

[0178] Although the operations of the method according to the embodiments of the present disclosure have been described separately for each embodiment, the operations included in each embodiment may be combined with the operations of other embodiments to form new embodiments. Accordingly, embodiments in which the embodiments of the present disclosure are combined may also be understood as being described by the present disclosure.

[0179] The various embodiments of the present disclosure and the terms used therein are not intended to limit the technical features described in the present disclosure to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more items unless the relevant context clearly indicates otherwise. In the present disclosure, each of the phrases such as “A or B”, “at least one of A and B”, “at least one of A or B”, “A, B or C”, “at least one of A, B and C”, and “at least one of A, B, or C” may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used simply to distinguish a component from another component and do not limit the components in any other aspect (e.g., importance or order). Where a component (e.g., the first) is referred to as "coupled" or "connected" to another component (e.g., the second), with or without the terms "functionally" or "communicationally," it means that the component may be connected to the other component directly (e.g., via a wire), wirelessly, or through a third component.

[0180] As used in this disclosure, the term "module" may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be a component formed integrally, or a minimum unit of a component or part thereof that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0181] Various embodiments of the present disclosure may be implemented as software (e.g., a program) comprising one or more instructions stored in a storage medium (e.g., internal memory or external memory) readable by a machine (e.g., an electronic device). For example, a machine (e.g., a processor of an electronic device (e.g., processor (230)) may call at least one of the one or more instructions stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to at least one called instruction. One or more instructions may include code generated by a compiler or code that can be executed by an interpreter. The storage medium readable by the machine may be provided in the form of a non-transitory storage medium. Here, "non-transitory" simply means that the storage medium is a tangible device and does not contain a signal (e.g., an EM wave), and this term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily in the storage medium.

[0182] According to one embodiment, the method according to the various embodiments disclosed herein may be provided by being included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., CD-ROM (compact disc read-only memory)), or distributed online (e.g., download or upload) through an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily created in a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0183] According to various embodiments, each component (e.g., module or program) of the described components may include a singular or multiple entities. According to various embodiments, one or more of the components or operations among the aforementioned components may be omitted, or one or more other components or operations may be added. Generally or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as they were performed by the corresponding component among the multiple components prior to integration. According to various embodiments, operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically; one or more of the operations may be executed in a different order; omitted; or one or more other operations may be added.

Claims

1. A method performed by UE (user equipment) in a wireless communication system, A step of receiving a plurality of system information including group information regarding the SSB (synchronization signal block) of a serving cell or neighboring cells from a base station; Based on the above group information, a step of measuring SSBs received through cells belonging to the same group; and The method includes the step of transmitting a report on the measurement to the base station. The above group information includes a group index for an SSB received through the above serving cell or the above neighbor cell, method.

2. In Claim 1, The above plurality of system information includes first system information, second system information and third system information, and The above first system information includes a first group index related to the serving cell of the UE, and The above second system information includes a second group index for a first neighbor cell having the same frequency band as the serving cell, and The above third system information includes a third group index for a second neighbor cell having a different frequency band from the above serving cell, and The first system information includes SIB (system information block) 1, the second system information includes SIB3, and the third system information includes SIB4. The above SIB1, the above SIB3, and the above SIB4 are broadcasting, method.

3. In Claim 1, A step of receiving a radio resource control (RRC) message from the base station containing updated group information regarding the SSBs of the serving cell or the neighboring cells; A step of measuring SSBs received through cells belonging to the same updated group based on the above-mentioned updated group information; and The method further comprises the step of transmitting a report on the measurement based on the updated group information to the base station. method.

4. In Claim 1, The above measuring step measures the SSB received through the cells with the same group index among the serving cell and the neighboring cells, and The above report includes multiple measurement results for each of the cells where the group index is the same, and Among the plurality of measurement results above, the first measurement result includes information about the first SSB having the best signal quality among the cells in the same group as the serving cell of the UE, and Among the plurality of measurement results above, the second measurement result includes information about the second SSB having the best signal quality among the serving cell and other groups of cells, method.

5. In a method performed by a base station in a wireless communication system, A step of transmitting a plurality of system information, including group information regarding the SSBs of serving cells or neighboring cells, to UE (user equipment); The step of transmitting an SSB to the above UE using different beams for each of the multiple cells in the same time resource; and The method includes the step of receiving a report from the above UE regarding the measurement of the SSB based on the group information, and The above group information includes a group index for an SSB transmitted through the above serving cell or the above neighboring cells, method.

6. In Claim 5, The above plurality of system information includes first system information, second system information and third system information, and The above first system information includes a first group index related to the serving cell of the UE, and The above second system information includes a second group index for a first neighbor cell having the same frequency band as the serving cell, and The above third system information includes a third group index for a second neighbor cell having a different frequency band from the above serving cell, and The above second group information and third group information are received from another base station based on the Xn interface, and The first system information includes SIB (system information block) 1, the second system information includes SIB3, and the third system information includes SIB4. The above SIB1, the above SIB3, and the above SIB4 are broadcasting, method.

7. In Claim 5, A step of transmitting a radio resource control (RRC) message to the UE containing updated group information regarding the SSBs of the serving cell or neighboring cells; and The method further comprises the step of receiving a report from the above UE regarding the measurement of the SSB based on the updated group information. method.

8. In Claim 5, The above report includes multiple measurement results for each of the cells where the group index is the same, and Among the plurality of measurement results above, the first measurement result includes information about the first SSB having the best signal quality among the cells in the same group as the serving cell of the UE, and Among the plurality of measurement results above, the second measurement result includes information about the second SSB having the best signal quality among the serving cell and other groups of cells, method.

9. Regarding UE (user equipment), At least one transceiver; At least one processor communicatively coupled to the above at least one transceiver; and It includes at least one memory that is communicationally coupled to the above at least one processor and stores instructions, and The above instructions are executed individually or in any combination by the above at least one processor, so that the UE: Receive multiple system information from a base station, including group information regarding the SSB (synchronization signal block) of a serving cell or neighboring cells, and Based on the above group information, measure the SSBs received through cells belonging to the same group, and Instruct the above base station to transmit a report regarding the above measurement, The above group information includes a group index for an SSB received through the above serving cell or the above neighbor cell, UE.

10. In Claim 9, The above plurality of system information includes first system information, second system information and third system information, and The above first system information includes a first group index related to the serving cell of the UE, and The above second system information includes a second group index for a first neighbor cell having the same frequency band as the serving cell, and The above third system information includes a third group index for a second neighbor cell having a different frequency band from the above serving cell, and The first system information includes SIB (system information block) 1, the second system information includes SIB3, and the third system information includes SIB4. The above SIB1, the above SIB3, and the above SIB4 are broadcasting, UE.

11. In claim 9, the above instructions are said to be: the UE Receive a radio resource control (RRC) message from the base station containing updated group information regarding the SSBs of the serving cell or neighboring cells, and Based on the above updated group information, measure the SSBs received through cells belonging to the same updated group, and To have the above base station transmit a report on the measurement based on the above updated group information, UE.

12. In Claim 9, The above measurement measures the SSB received through the cells with the same group index among the serving cell and the neighboring cells, and The above report includes multiple measurement results for each of the cells where the group index is the same, and Among the plurality of measurement results above, the first measurement result includes information about the first SSB having the best signal quality among the cells in the same group as the serving cell of the UE, and Among the plurality of measurement results above, the second measurement result includes information about the second SSB having the best signal quality among the serving cell and other groups of cells, UE.

13. Regarding base stations, At least one transceiver; At least one processor communicatively coupled to the above at least one transceiver; and It includes at least one memory that is communicationally coupled to the above at least one processor and stores instructions, and The above instructions are executed individually or in any combination by the above at least one processor, so that the base station: Transmit multiple system information including group information regarding the SSBs of serving cells or neighboring cells to UE (user equipment), and To the above UE, transmit an SSB using different beams for each of the multiple cells within the same time resource, and Receiving a report from the above UE regarding the measurement of the SSB based on the above group information, The above group information includes a group index for an SSB transmitted through the above serving cell or the above neighboring cells, Base station.

14. In Claim 13, The above plurality of system information includes first system information, second system information and third system information, and The above first system information includes a first group index related to the serving cell of the UE, and The above second system information includes a second group index for a first neighbor cell having the same frequency band as the serving cell, and The above third system information includes a third group index for a second neighbor cell having a different frequency band from the above serving cell, and The above second group information and the above third group information are received from another base station based on the Xn interface, and The first system information includes SIB (system information block) 1, the second system information includes SIB3, and the third system information includes SIB4. The above SIB1, the above SIB3, and the above SIB4 are broadcasting, Base station.

15. In claim 13, the above commands are said to be for the base station: Transmit a radio resource control (RRC) message to the UE containing updated group information regarding the SSBs of the serving cell or neighboring cells, and To receive a report from the above UE regarding the measurement of the SSB based on the above updated group information, and The above report includes multiple measurement results for each of the cells where the group index is the same, and Among the plurality of measurement results above, the first measurement result includes information about the first SSB having the best signal quality among the cells in the same group as the serving cell of the terminal, and Among the plurality of measurement results above, the second measurement result includes information about the second SSB having the best signal quality among the serving cell and other groups of cells, Base station.

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