Method and apparatus for dynamic cell measurement configuration based on lower layer signal in wireless communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates. The present disclosure proposes a method performed by a terminal in a wireless communication system, the method comprising the steps of: receiving, from a base station, a radio resource control (RRC) message including at least one configuration for secondary cell (SCell) measurement; receiving, from the base station, a signal related to a synchronization signal block (SSB) for the SCell on the basis of the RRC message; and determining whether to measure the SCell on the basis of the related signal.

Description

Method and device for dynamic cell measurement setup based on low-layer signaling in wireless communication systems

[0001] The present disclosure relates to operations of terminals and base stations in a wireless communication system. More specifically, the present disclosure relates to a method and device for dynamic cell measurement configuration based on low-layer signals for power saving of a terminal corresponding to an operation in which a base station or a secondary cell (hereinafter referred to as SCell) dynamically turns on and off transmission of a synchronization signal block (hereinafter referred to as SSB) for power saving in a Network Energy Saving (NES) system supporting power saving technology.

[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 satisfy 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, support for various numerologies (such as operation of multiple subcarrier intervals) and dynamic operation of 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, and L2 pre-processing (L2). Standardization has been made for network slicing, which provides dedicated networks specialized for specific services, and pre-processing.

[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 (Vehicle-to-Everything) to help autonomous vehicles make driving decisions and increase user convenience based on their own location and status information transmitted by vehicles, 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 Networking (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, supporting metaverse services, and drone communications by utilizing eXtended Reality (XR), Artificial Intelligence (AI), and Machine Learning (ML) to efficiently support Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR).

[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] The embodiment disclosed in the present invention is intended to provide a method and device capable of effectively providing a service in a mobile communication system.

[0009] The present disclosure provides a method and device for transmitting a wake-up signal of a terminal for transmission of a synchronization signal block (SSB) of a base station operating in a power saving mode in a wireless communication system.

[0010] The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0011] According to one embodiment of the present disclosure, a method for triggering a terminal to transmit a wake-up signal to adjacent cells and base stations according to a specific condition may include at least one of an operation of receiving a signal including trigger condition setting information for transmitting a wake-up signal from a first base station, an operation of determining a trigger condition, or an operation of transmitting a wake-up signal.

[0012] Based on the discussion described above, the present disclosure provides a method for processing a control signal in a mobile communication system, which may include: receiving a first control signal transmitted from a base station; processing the received first control signal; and transmitting a second control signal generated based on the processing to the base station.

[0013] According to one embodiment of the present disclosure, a method performed by a terminal in a wireless communication system is disclosed, the method comprising: receiving, from a base station, a radio resource control (RRC) message including at least one configuration for secondary cell (SCell) measurement; receiving, from the base station, a signal related to a synchronization signal block (SSB) for the SCell based on the RRC message; and determining, based on the related signal, whether to measure the SCell.

[0014] According to one embodiment of the present disclosure, a method performed by a base station in a wireless communication system, the method comprising: transmitting, to a terminal, a radio resource control (RRC) message including at least one setting for secondary cell (SCell) measurement; and transmitting, to the terminal, a signal related to a synchronization signal block (SSB) for the SCell based on the RRC message; wherein whether to measure the SCell is determined based on the related signal.

[0015] According to one embodiment of the present disclosure, a terminal in a wireless communication system is disclosed, the terminal including: a transceiver; and a control unit coupled with the transceiver; wherein the control unit receives, from a base station, a radio resource control (RRC) message including at least one setting for secondary cell (SCell) measurement, receives, from the base station, a signal related to a synchronization signal block (SSB) for the SCell based on the RRC message, and determines, based on the related signal, whether to measure the SCell.

[0016] According to one embodiment of the present disclosure, a base station in a wireless communication system is disclosed, the base station including: a transceiver; and a control unit coupled with the transceiver; wherein the control unit transmits, to a terminal, a radio resource control (RRC) message including at least one setting for secondary cell (SCell) measurement, and transmits, to the terminal, a signal related to a synchronization signal block (SSB) for the SCell based on the RRC message, and whether or not to measure the SCell is determined based on the related signal.

[0017] One embodiment of the present disclosure provides a device and method for effectively providing services in a wireless communication system. Specifically, according to one embodiment of the present disclosure, a network in a wireless communication system can exit sleep mode and transmit SSB signals when necessary. This can further reduce network power consumption.

[0018] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by a person having ordinary skill in the art to which the present disclosure pertains from the description below.

[0019] FIG. 1 is a diagram illustrating a next-generation mobile communication system structure that supports network energy saving according to an embodiment of the present invention.

[0020] FIG. 2 is a diagram illustrating a next-generation mobile communication system structure that supports network energy saving according to an embodiment of the present invention.

[0021] FIG. 3 is a diagram illustrating a procedure by which a base station causes a terminal to stop measurement of a specific cell according to an embodiment of the present disclosure.

[0022] FIG. 4 is a diagram illustrating a MAC-CE signal according to an embodiment of the present disclosure.

[0023] FIG. 5 is a diagram illustrating a MAC-CE signal according to an embodiment of the present disclosure.

[0024] FIG. 6 is a diagram illustrating a MAC-CE signal according to an embodiment of the present disclosure.

[0025] FIG. 7 is a diagram illustrating a procedure for a terminal to stop RS measurement of a base station according to an embodiment of the present disclosure.

[0026] FIG. 8 is a diagram illustrating a procedure for a terminal to stop RS measurement of a base station according to an embodiment of the present disclosure.

[0027] FIG. 9 is a diagram illustrating a procedure in which a terminal starts RS measurement of a base station according to an embodiment of the present disclosure.

[0028] FIG. 10 is a diagram illustrating a procedure in which a terminal starts RS measurement of a base station according to an embodiment of the present disclosure.

[0029] FIG. 11 is a diagram illustrating the structure of a base station according to one embodiment of the present disclosure.

[0030] FIG. 12 is a diagram illustrating the structure of a terminal according to an embodiment of the present disclosure.

[0031] Hereinafter, the operating principle of the present invention will be described in detail with reference to the attached drawings, one embodiment of the present disclosure.

[0032] In describing this disclosure, descriptions of technical details that are well-known in the technical field to which this disclosure pertains and are not directly related to this disclosure will be omitted. This is to avoid obscuring the gist of this disclosure by omitting unnecessary explanations and to convey it more clearly. Furthermore, the terms described below are defined based on their functions in this disclosure and may vary depending on the intent or custom of the user or operator. Therefore, their definitions should be based on the contents of this specification as a whole.

[0033] The operating principles of the present invention are described in detail below with reference to the attached drawings. The terms described below are defined based on their functions within the present invention. These terms may vary depending on the intent or custom of the user or operator, and therefore their definitions should be determined based on the overall content of this specification.

[0034] In the following description of the present invention, detailed descriptions of known functions or configurations will be omitted if they are deemed to unnecessarily obscure the gist of the invention. Furthermore, the terms described below are defined in light of their functions within the present invention and may vary depending on the intent or custom of the user or operator. Therefore, their definitions should be based on the overall content of this specification.

[0035] 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.

[0036] 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 solely to ensure that 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.

[0037] The terms used in the following description to identify connection nodes, terms referring to network entities, terms referring to messages, terms referring to interfaces between network entities, and terms referring to various identification information are provided for convenience of explanation. Therefore, the present invention is not limited to the terms described below, and other terms referring to objects with equivalent technical meanings may be used.

[0038] Hereinafter, the base station is an entity that performs resource allocation of a 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.

[0039] In addition, although the LTE or LTE-A system may be described below as an example, embodiments of the present disclosure may also be applied to other communication systems with similar technical backgrounds or channel types. For example, the 5th generation mobile communication technology (5G, new radio, NR) developed after LTE-A may be included in a system to which embodiments of the present disclosure may be applied, and the 5G described below may 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 determined by a person having skilled technical knowledge. In this case, it will be understood that each block of the processing flow diagrams and combinations of the flow diagrams may be performed by computer program instructions.

[0040] These computer program instructions may be installed in a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus, so that the instructions executed by the processor of the computer or other programmable data processing apparatus create means for performing the functions described in the flowchart block(s). These computer program instructions may also be stored in a computer-available or computer-readable memory that can be directed to a computer or other programmable data processing apparatus to implement functions in a particular manner, so that the instructions stored in the computer-available or computer-readable memory can produce an article of manufacture that includes instruction means for performing the functions described in the flowchart block(s). The computer program instructions may also be installed on a computer or other programmable data processing apparatus, so that a series of operational steps are performed on the computer or other programmable data processing apparatus to create a computer-implemented process, so that the instructions executing on the computer or other programmable data processing apparatus can 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 '~ unit' used in the present embodiment means software or hardware components such as FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit), and the '~ unit' can perform certain roles. However, the '~ unit' is not limited to software or hardware. The '~ unit' 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 '~ unit' 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 '~ units' may be combined into a smaller number of components and '~ units' or further separated into additional components and '~ units'. 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] For convenience of explanation, this disclosure uses terms and names defined in the 5GS and NR standards, which are standards defined by the 3rd Generation Partnership Project (3GPP). However, the present invention is not limited to these terms and names and can be equally applied to wireless communication networks that comply with other standards. For example, the present invention can be applied to the 3GPP 5GS / NR (5th generation mobile communication standard).

[0044] For convenience of explanation below, some terms and names defined in the 3rd generation partnership project (3GPP) LTE (long term evolution) standard and / or 3GPP NR (new radio) standard may be used. However, the present disclosure is not limited to the above terms and names, and can be equally applied to systems conforming to other standards.

[0045] Certain terms used in the following description are provided to aid in understanding the present disclosure, and the use of such specific terms may be changed to other forms without departing from the technical spirit of the present disclosure.

[0046] FIG. 1 is a diagram illustrating a next-generation mobile communication system structure that supports network energy saving according to an embodiment of the present invention.

[0047] Referring to FIG. 1, a next-generation mobile communication system supporting network energy saving may be configured with at least one of a next-generation base station (1-01, g Node B, hereinafter referred to as gNB, Node B or base station) and a cell (1-06, 1-07, 1-08) or a terminal (1-09, hereinafter referred to as User Equipment (UE)). Here, the gNB may be configured with a CU (1-02, Central Unit) and at least one DU (1-03, 1-04, Distributed Unit).

[0048] One CU can support at least one DU, and one DU (1-03, 1-04) can support one cell (1-06, 1-07, 1-08), or at least one cell (1-06, 1-07, 1-08).

[0049] For example, PCell (1-06, Primary Cell) and SCell 1 (1-07, Secondary Cell) can be managed by DU (1-03), and SCell 2 (1-08) can be managed by DU (1-04). Alternatively, PCell and SCell 1 can be managed by DU (1-04), and SCell 1 can be managed by DU (1-03).

[0050] UE(1-09) can access an external network via gNB through cell.

[0051] Each of the cells (1-06, 1-07, 1-08) can maintain a connection to a specific UE. At least one cell can maintain a connection to a single UE and support data transmission and reception using the same or different resources. A specific cell (1-06) can operate as a primary cell (PCell). When operating as a PCell, the cell can perform an initial connection setup procedure for a UE or initiate a connection re-establishment procedure. Alternatively, it can operate on a primary frequency as a cell designated as a primary cell in a handover procedure. Other cells (1-07, 1-08) can operate as secondary cells (SCell). When operating as SCell, it can be used to provide additional radio resources. Alternatively, it can operate on a secondary frequency and can be configured after an RRC connection is established.

[0052] A PCell (1-06) and an SCell (1-07) may have their transceivers located in the same location. For SCell (1-08), their transceivers may be located physically different from PCell (1-06). Different cells may use at least one of the following: different frequencies, different carriers, different times, or different numerologies (e.g., subcarrier spacing).

[0053] FIG. 2 is a diagram illustrating a next-generation mobile communication system structure that supports network energy saving according to an embodiment of the present invention.

[0054] Referring to FIG. 2, a next-generation mobile communication system supporting network energy saving may be configured with at least one of next-generation base stations (2-1, 2-11, g Node B, hereinafter referred to as gNB, Node B or base station) and a cell (2-6, 2-7, 2-8) or a terminal (2-9, User Equipment (UE)). The gNB may be configured with a CU (2-2, 2-12, Central Unit) and at least one DU (2-3, 2-4, 2-13, 2-14 Distributed Unit).

[0055] One CU can support at least one DU, and one DU (2-3, 2-4, 2-13, 2-14) can support one cell (2-6, 2-7, 2-8), or at least one cell (2-6, 2-7, 2-8).

[0056] UE(2-9) can access an external network via gNB through cell.

[0057] Each of the cells (2-6, 2-7, 2-8) can maintain a connection to a specific UE. At least one cell can maintain a connection to a single UE, and can support data transmission and reception using the same or different resources. A specific cell (2-6) can operate as a primary cell (PCell). When operating as a PCell, the cell can perform an initial connection setup procedure for a UE or initiate a connection re-establishment procedure. Alternatively, it can operate on a primary frequency as a cell designated as a primary cell in a handover procedure. Other cells (2-7, 2-8) can operate as secondary cells (SCell). When operating as SCells, it can be used to provide additional radio resources. Alternatively, it can operate on a secondary frequency and can be configured after an RRC connection is established.

[0058] A PCell (2-6) and an SCell (2-7) may have their transceivers located in the same location. For SCell (2-8), their transceivers may be located physically different from PCell (2-6). Different cells may be managed by different gNBs and may use at least one of the following: different frequencies, different carriers, different times, or different numerologies (e.g., subcarrier spacing).

[0059] FIG. 3 is a diagram illustrating a procedure by which a base station causes a terminal to stop measurement of a specific cell according to an embodiment of the present disclosure.

[0060] Referring to FIG. 3, a terminal (3-1) may receive a signal including a setting (e.g., measurement configuration) to measure specific Reference Signals (RS) for Radio Resource Management (RRM) and mobility management for a specific cell (e.g., Cell 1) from a base station (3-2) in step 3-3. The signal may be at least one of an RRC signal (e.g., Radio Resource Control (RRC) configuration, RRC reconfiguration, etc.), a Medium Access Control (MAC) signal (e.g., MAC Control Element (MAC-CE), etc.), or a Physical layer (PHY) signal (e.g., Downlink Control Information (DCI), etc.).

[0061] A terminal that has received at least one setting of RS transmission information (e.g., at least one of a cell identifier (ID) or an RS identifier (ID)), RS type (e.g., Synchronization Signal Block (SSB), or Channel State Information (CSI)-Reference Signal (RS)), measurement frequency (Absolute Radio Frequency Channel Number, ARFCN), measurement period, measurement duration per period, time offset, or number of measurements of a specific cell (e.g., Cell 1) through the signal (3-3) can perform measurement on the corresponding RS in step 3-4 according to the received setting.

[0062] The terminal (3-1) may receive from the base station (3-2) at least one of a signal or indication including a setting to stop measuring specific Reference Signals (RS) for Radio Resource Management (RRM) and mobility management for a specific cell (e.g., Cell 1) set to be measured through the signal (3-3) in step 3-5. The signal may be at least one of an RRC signal (e.g., RRC configuration, RRC reconfiguration, etc.), a MAC signal (e.g., MAC-CE, etc.), or a PHY signal (e.g., DCI, etc.).

[0063] The above signal (3-5) may be a signal to which information including a setting to stop measurement is added to the existing signal (3-3).

[0064] For example, in one embodiment, the signal (3-5) may be a signal for the base station to cause the terminal to release the connection to a specific cell (e.g., Cell 1). The signal (3-5) may be at least one of an RRC Release signal, an SCell activation / deactivation signal transmitted from MAC, a CSI-RS / CSI-Inference Measurement (IM) Resource Set Activation / Deactivation signal, or a newly defined MAC-CE, PHY DCI signal. The signal (3-5) may include information for causing the RS measurement of a specific cell (e.g., Cell 1) to be stopped. The signal (3-5) may include at least one of the following information.

[0065] - Cell identifier (ID) of a specific cell (e.g. Cell 1)

[0066] - An indicator that instructs to stop SSB measurements for a specific cell (e.g., Cell 1).

[0067] - An indicator that instructs to stop CSI-RS measurements for a specific cell (e.g., Cell 1).

[0068] - An indicator that instructs to stop all RS measurements for a specific cell (e.g., Cell 1).

[0069] - an indicator indicating to stop a specific RS measurement of a specific cell (e.g., Cell 1), at least one of the types of specific RS (e.g., SSB or CSI-RS), or a list of identifiers (IDs) (e.g., SSB ID, or CSI-RS ID).

[0070] - Time duration to stop RS measurement for a specific cell (e.g. Cell 1)

[0071] - An indicator that informs the terminal that a specific cell (e.g., Cell 1) will stop SSB transmission.

[0072] - An indicator that informs the terminal that a specific cell (e.g., Cell 1) will stop transmitting SSB, CSI-RS, etc. and enter Sleep mode.

[0073] - Sleep mode pattern (e.g., period, sleep length, time offset, etc.) of a specific cell (e.g., Cell 1)

[0074] FIG. 4 is a diagram illustrating a MAC-CE signal according to an embodiment of the present disclosure.

[0075] The MAC-CE signal may be at least one of a modified SCell deactivation signal transmitted by the base station to the terminal to terminate connection to a specific cell (e.g., Cell 1) or a newly defined MAC-CE signal. The MAC-CE signal may consist of one octet. The signal may be a modified version of any existing signal transmitted from the MAC.

[0076] The MAC CE signal may include at least one of the indicators Ci and I. The indicator Ci may indicate to the base station to stop RRM measurements for the terminal, and the indicator I may indicate to the base station to stop RRM measurements for the terminal. Specific descriptions of the indicators Ci and I are as follows.

[0077] Indicator Ci: If there is an SCell configured in the MAC entity with SCellIndex i in the RRC configuration received by the terminal from the base station (e.g., a signal received in step 3-3 of FIG. 3), the activation / deactivation status of the SCell can be indicated with SCellIndex i. If there is no SCell configured in the MAC entity with SCellIndex i, the MAC entity can ignore the field. The Ci field can be set to 1 to indicate that the SCell with SCellIndex i should be activated. The Ci field can be set to 0 to indicate that the SCell with SCellIndex i should be deactivated.

[0078] Indicator I: Indicator I may indicate an indicator that suspends at least one of the RRM measurement or RS measurement of the SCell, which changes the terminal from an activation state to a deactivation state. If Indicator I is turned on (e.g., if the corresponding field is set to 1), the indication may indicate that it is activated. If Indicator I is turned on, the Random Access procedure in progress on the SCell may be suspended. Alternatively, the corresponding field may be set to 0. FIG. 5 is a diagram illustrating a MACE-CE signal according to an embodiment of the present disclosure.

[0079] The MAC-CE signal may be at least one of a modified SCell deactivation signal or a newly defined MAC-CE signal that the base station transmits to the terminal to terminate the connection to a specific cell (e.g., Cell 1).

[0080] The MAC-CE signal can be composed of four octets, each consisting of one I bit and Ci bits, and the number of octets can be changed depending on the settings.

[0081] Referring to FIG. 5, the base station can configure and transmit a MAC-CE signal including at least one of an indicator Ci indicating an SCell to stop RRM measurement to the terminal or an indicator I notifying to stop RRM measurement.

[0082] Indicator Ci: If there is an SCell configured in the MAC entity with SCellIndex i in the RRC configuration received by the terminal from the base station (e.g., a signal received in step 3-3 of FIG. 3), the activation / deactivation status of the SCell can be indicated by the SCellIndex i. If there is no SCell configured in the MAC entity with SCellIndex i, the MAC entity can ignore the Ci field. The Ci field can be set to 1 if it indicates that the SCell with SCellIndex i should be activated. The Ci field can be set to 0 if it indicates that the SCell with SCellIndex i should be deactivated.

[0083] Indicator I: Indicator I may indicate an indicator that suspends at least one of the RRM measurements or RS measurements of the SCell, which transitions the terminal from the activation state to the deactivation state. If Indicator I is turned on (e.g., the corresponding field is set to 1), it may indicate that the indication is activated. Alternatively, the corresponding field may be set to 0.

[0084] If a terminal's MAC entity consists of at least one SCell, the network can activate or deactivate the configured SCell. When configuring SCells, the sCellState parameter can be activated for each upper layer. If the sCellState parameter is not activated for a SCell, the SCell can be deactivated.

[0085] At least one configured SCell can be activated or deactivated as follows:

[0086] - Can receive SCell Activation / Deactivation MAC CE.

[0087] - Enhanced SCell Activation / Deactivation MAC CE can be received.

[0088] - A per-SCell sCellDeactivationTimer timer can be configured (except when there is an SCell configured as a Physical Uplink Control Channel (PUCCH)): the SCell can be deactivated when the corresponding timer expires.

[0089] - sCellState can be set for each configured SCell: If set, the associated SCell can be activated when configuring the SCell.

[0090] - scg-State can be received: SCells in the Secondary Cell Group (SCG) can be deactivated.

[0091] For each configured SCell, the MAC entity of the terminal can perform at least one of the following actions.

[0092] 1> If SCell State is set to be activated when configuring SCell, or if at least one of SCell Activation / Deactivation MAC CE or SCell Activation / Deactivation MAC CE is activated:

[0093] 2> If SCell is deactivated and Tracking Reference Signal (TRS) is selected for SCell Activation before receiving Enhanced SCell Activation / Deactivation MAC CE:

[0094] 3> Information about TRS can be directed to lower layers.

[0095] 2> If the SCell is deactivated before receiving the SCell Activation / Deactivation MAC CE or this Enhanced SCell Activation / Deactivation MAC CE, or

[0096] 2> When SCell is set to sCellState which is set to enable SCell:

[0097] 3> If firstActiveDownlinkBWP-Id is not set to a dormant BandWidth Part (BWP):

[0098] 4> SCell can be activated according to the timing defined in TS 38.213 for MAC CE activation and the timing defined in TS 38.133 for SCell activation.

[0099] An activated SCell may perform at least one of the following actions to enforce normal SCell operation:

[0100] 5> Sounding Reference Signal (SRS) can be transmitted in SCell;

[0101] 5> You can report CSI on SCell;

[0102] 5> The Physical Downlink Control Channel (PDCCH) for SCell can be monitored;

[0103] 5> Physical Uplink Control Channel (PUCCH) transmission on SCell when PUCCH transmission on SCell is configured

[0104] 3> Other (for example, firstActiveDownlinkBWP-Id may be set to a dormant BWP):

[0105] 4> If the bwp-InactivityTimer of the Serving Cell is running, the timer can be stopped.

[0106] 3> The Downlink (DL) BWP indicated by firstActiveDownlinkBWP-Id can be activated. Additionally, the Uplink (UL) BWP indicated by firstActiveUplinkBWP-Id can be activated.

[0107] 2> The sCellDeactivationTimer associated with the SCell can be started or restarted according to the timing defined in TS 38.213 for MAC CE activation and the timing defined in TS 38.133 for SCell activation;

[0108] 2> If the Active DL BWP is not a dormant BWP:

[0109] 3> A suspended uplink resource allocation (uplink grant) can be (re)activated. The uplink resource allocation may be an uplink with a configured grant type 1 associated with the corresponding SCell. If the UE has stored pre-configured information, the uplink resource allocation may be activated accordingly. In this case, uplink resource transmission may be initiated from a symbol according to the rules of section 5.8.2 of TS 38.321.

[0110] 3> Power Headroom Report (PHR) can be triggered.

[0111] 1> Otherwise (if else) if at least one of the SCell Activation / Deactivation MAC CE or Enhanced SCell Activation / Deactivation MAC CE is received to deactivate the SCell, or

[0112] 1> When the sCellDeactivationTimer associated with the activated SCell expires.

[0113] 2> A SCell can be disabled according to the timing defined in TS 38.213; a disabled SCell can perform at least one of the following actions:

[0114] 2> You can stop the sCellDeactivationTimer associated with the SCell;

[0115] 2> You can stop the bwp-InactivityTimer associated with the SCell;

[0116] 2> Active BWP associated with SCell can be disabled;

[0117] 2> The configured downlink allocation and the configured uplink grant type 2 associated with the SCell can be released respectively;

[0118] 2> Physical Uplink Shared Channel (PUSCH) resources for semi-persistent CSI reporting related to SCell can be cleared;

[0119] 2> Uplink grant Type 1 configured in relation to SCell can be stopped;

[0120] 2> All Hybrid Automatic Repeat reQuest (HARQ) buffers associated with the SCell can be flushed;

[0121] 2> If a series of consecutive Listen Before Talk (LBT) failures occur for a SCell, at least one of the LBT operation or the operation counting the failure of the LBT operation may be canceled;

[0122] 1> If the PDCCH of the activated SCell indicates at least one of uplink grant or downlink assignment, or

[0123] 1> If the PDCCH in the Serving Cell scheduling indicates at least one of the uplink grant or downlink assignment for the activated SCell, or

[0124] 1> If an LBT failure indication is not received from the lower layer by transmitting a MAC Packet Data Unit (PDU) in the configured uplink grant, or

[0125] 1> When receiving a MAC PDU in the configured Downlink Assignment:

[0126] 2> You can restart the sCellDeactivationTimer associated with the SCell.

[0127] 1> If SCell is disabled:

[0128] 2> Sounding Reference Signal (SRS) may not be transmitted in SCell;

[0129] 2> Channel State Information (CSI) for SCell may not be reported;

[0130] 2> It may not transmit on the Uplink Shared Channel (UL-SCH) in SCell;

[0131] 2> Random Access Channel (RACH) may not be transmitted in SCell;

[0132] 2> PDCCH may not be monitored in SCell;

[0133] 2> PDCCH for SCell may not be monitored;

[0134] 2> PUCCH may not be transmitted in SCell.

[0135] HARQ feedback for MAC PDUs containing at least one of SCell Activation / Deactivation MAC CE or Enhanced SCell Activation / Deactivation MAC CE may not be affected by PCell, PSCell, or PUCCH SCell interruption due to SCell Activation / Deactivation as per Technical Specification (TS) 38.133.

[0136] If SCell is disabled, any Random Access procedures in progress on the SCell may be interrupted.

[0137] FIG. 6 is a diagram illustrating a MAC-CE signal according to an embodiment of the present disclosure.

[0138] The MAC-CE signal may be at least one of a modified CSI-RS / CSI-IM Resource Set Activation / Deactivation MAC-CE signal or a newly defined MAC-CE signal that the base station transmits to the terminal to terminate the connection to a specific cell (e.g., Cell 1). The MAC-CE signal consists of four octets, and the number of octets may change depending on the configuration.

[0139] Referring to FIG. 6, the base station can configure and transmit a MAC-CE signal including at least one of an indicator Ci indicating an SCell to stop RRM measurement to the terminal and an indicator I notifying to stop RRM measurement.

[0140] Activation / Deactivation (A / D): This field may indicate whether the indicated Semi-Persistent (SP) CSI-RS and CSI-IM resource set(s) are activated or deactivated. The A / D field may be set to 1 to indicate activation, and if not set to 1, it may indicate deactivation.

[0141] Serving Cell ID: This field can indicate the identity of the serving cell to which the MAC CE applies. The field can be 5 bits long.

[0142] BWP ID: A codepoint of the DCI bandwidth part indicator field specified in TS 38.212 that can indicate a DL BWP to which MAC CE applies. The BWP ID field can be 2 bits long.

[0143] SP CSI-RS Resource Set ID: This field may contain the index of an NZP-CSI-RS-ResourceSet containing Semi Persistent Non Zero Power (NZP) CSI-RS resources. The index of the NZP-CSI-RS-ResourceSet indicates a Semi Persistent NZP CSI-RS resource set, which may be enabled or disabled. The field may be 6 bits long.

[0144] Inference Management (IM): This field may indicate the presence of an octet containing an SP CSI-IM resource set ID field. If the IM field is set to 1, it may mean that an octet containing an SP CSI-IM resource set ID field is present. If the IM field is set to 0, it may mean that an octet containing an SP CSI-IM resource set ID field is not present.

[0145] SP CSI-IM Resource Set ID: This field may contain the index of a CSI-IM-ResourceSet containing Semi-Persistent CSI-IM resources of TS 38.331. The SP CSI-IM Resource Set ID indicates a Semi-Persistent CSI-IM Resource Set and may be enabled or disabled. The length of this field may be 6 bits.

[0146] Transmission Configuration Indication (TCI) State IDi: This field may contain the TCI-StateId of TS 38.331 of the TCI State. Additionally, this field may be used as a Quasi Co Location (QCL) source for resources within the Semi Persistent NZP CSI-RS resource set indicated by the SP CSI-RS Resource Set ID field. TCI State ID0 may indicate the TCI State for the first resource within the set. TCI State ID1 may indicate the TCI State for the second resource. The field may be 7 bits long. If the A / D field is set to 0, the octet containing the TCI State ID field(s) may not be present.

[0147] Indicator I: When this indicator is on (e.g., enabled or set to 1), the UE may suspend at least one of the RRM measurement or RS measurement of the SCell, which causes it to transition from the activation state to the deactivation state. When this indicator is enabled, it may be set to 1 (or 0).

[0148] FIG. 7 is a diagram illustrating a procedure for a terminal to stop RS measurement of a base station according to an embodiment of the present disclosure.

[0149] Referring to FIG. 7, a terminal (7-1) can receive a signal (e.g., RRM measurement configuration of cell 2 (7-4)) including a setting to measure specific Reference Signals (RS) for Radio Resource Management (RRM) and mobility management for a specific cell (e.g., a cell belonging to base station 2 (7-3) (hereinafter, cell 2 or a specific cell)) from base station 1 (7-2) in step 7-4. The signal (7-4) can be at least one of an RRC signal (e.g., RRC configuration, or RRC reconfiguration signal, etc.), a MAC signal (e.g., MAC-CE, etc.), or a PHY signal (e.g., DCI, etc.).

[0150] A terminal that has received at least one setting among RS transmission information (e.g., at least one of cell ID or RS identifier (ID)), RS type (e.g., SSB, or CSI-RS), measurement frequency (ARFCN), measurement period, measurement duration per period, time offset, or number of measurements of a specific cell (e.g., Cell 2) through the signal (7-4) can perform measurement on the corresponding RS in step 7-5 according to the received setting (7-5).

[0151] The terminal (7-1) can measure a specific cell (e.g., cell 2) by receiving an RS signal (7-6) (e.g., SSB signal, CSI-RS signal, etc.) transmitted by base station 2 (7-3).

[0152] Base station 2 (7-3) may decide to terminate RS (e.g., SSB) transmission of a specific cell (e.g., cell 2) at step 7-7 based on power saving, reduction in number of users in the cell, etc. (7-7).

[0153] Base station 2 (7-3) may provide or instruct (e.g., SSB turn off indication) to base station 1 (7-2) in step 7-8 a decision to terminate RS transmission of a specific cell (e.g., Cell 2). The instruction may enable base station 1 (7-2) to transmit a signal related to information about termination of RS transmission to terminal (7-1) (7-8). The signal related to information about termination of RS transmission may be an inter-node signal transmitted through a direct connection between base stations or a higher entity (e.g., core network, etc.) via at least one of the X2, Xn interface, or Fn interface between base stations.

[0154] Base station 1 (7-2) may recognize that a specific cell (e.g., Cell 2) will terminate transmission of an RS (e.g., SSB) in the future in step 7-9, and transmit a downlink signal or indication (e.g., indication to stop measurement of cell 2) to the terminal (7-9). The terminal receiving the signal may stop transmission of the RS (e.g., SSB) to reduce unnecessary power consumption (7-11). The signal may be a signal disclosed in at least one of FIG. 3, FIG. 4, FIG. 5, or FIG. 6. For example, it may be a signal transmitted in the downlink disclosed in step 3-5 of FIG. 3. Alternatively, it may be a signal modified from an existing signal disclosed in FIG. 5 or FIG. 6 (e.g., SCell deactivation signal). Alternatively, it may be a new MAC signal (e.g., MAC-CE, etc.), a PHY signal (e.g., DCI, etc.), or an RRC signal (e.g., RRC Reconfiguration).

[0155] Base station 2 (7-3) may stop RS (e.g., SSB) transmission for a specific cell (e.g., Cell 2) at step 7-10 (7-10). The terminal may stop measurement of a specific cell (e.g., Cell 2) at step 7-11 (7-11). This may allow the terminal to benefit from power savings, etc.

[0156] FIG. 8 is a diagram illustrating a procedure for a terminal to stop RS measurement of a base station according to an embodiment of the present disclosure.

[0157] Referring to FIG. 8, a terminal (8-1) can receive a signal (e.g., RRM measurement configuration (8-4)) including a setting to measure specific Reference Signals (RS) for Radio Resource Management (RRM) and mobility management for a specific cell (e.g., a cell belonging to base station 2 (8-3) (hereinafter, cell 2 or a specific cell)) from base station 1 (8-2) in step 8-4. The signal can be an RRC signal (e.g., RRC configuration, or RRC reconfiguration signal, etc.), a MAC signal (e.g., MAC-CE, etc.), a PHY signal (e.g., DCI, etc.).

[0158] A terminal that has received at least one setting among RS transmission information (e.g., at least one of cell ID or RS identifier (ID)), RS type (e.g., SSB, CSI-RS, etc.), measurement frequency (ARFCN), measurement period, measurement duration per period, time offset, or number of measurements of a specific cell (e.g., Cell 2) through the signal (8-4) can perform measurement on the corresponding RS in step 8-5 according to the received setting (8-5).

[0159] The terminal (8-1) can receive an RS signal (8-6) (e.g., an SSB signal, a CSI-RS signal, etc.) transmitted by the base station 2 (8-3). The terminal can perform measurements for a specific cell (e.g., cell 2).

[0160] Base station 2 (8-3) may decide to terminate RS (e.g., SSB) transmission of a specific cell (e.g., cell 2) at step 8-7 based on power saving, reduced number of users in the cell, etc.

[0161] Base station 2 (8-3) may recognize that a specific cell (e.g., Cell 2) will terminate transmission of an RS (e.g., SSB) in the future in step 8-8, and transmit a downlink signal or indication (e.g., indication to stop measurement of cell 2) to the terminal (8-8). The terminal receiving the signal may stop transmission of the RS (e.g., SSB) to reduce unnecessary power consumption (8-10). The signal may be a signal disclosed in at least one of FIG. 3, FIG. 4, FIG. 5, or FIG. 6. For example, it may be a signal transmitted in the downlink disclosed in step 3-5 of FIG. 3. Alternatively, it may be a signal modified from an existing signal disclosed in FIG. 5 or FIG. 6 (e.g., SCell deactivation signal). Alternatively, it may be a new MAC signal (e.g., MAC-CE), a PHY signal (e.g., DCI), or an RRC signal (e.g., RRC Reconfiguration).

[0162] Base station 2 (8-3) may stop RS (e.g., SSB) transmission for a specific cell (e.g., Cell 2) in step 8-9 (8-9). The terminal may stop measurements for the specific cell (e.g., Cell 2) (8-10). This may allow the terminal to benefit from power savings, etc.

[0163] FIG. 9 is a diagram illustrating a procedure in which a terminal starts RS measurement of a base station according to an embodiment of the present disclosure.

[0164] Referring to FIG. 9, the terminal (9-1) is in a state where measurement for a specific cell (e.g., cell 2) has been suspended (9-4). The terminal's suspension of measurement for a specific cell (e.g., cell 2) may be for power conservation as a result of receiving a downlink signal from a base station.

[0165] Base station 2 (9-3) may decide to start transmitting RS (e.g., SSB) of a specific cell (e.g., Cell 2) at step 9-5 (9-5).

[0166] Base station 2 (9-3) may provide or instruct base station 1 (9-2) to initiate RS transmission of a specific cell (e.g., Cell 2) in step 9-6 (e.g., SSB turn on indication). This may enable base station 1 (9-2) to transmit a signal related to the information to the terminal (9-6). The signal may be an inter-node signal transmitted through a direct connection between base stations or a higher entity (e.g., core network, etc.) via at least one of the X2, Xn interface, or Fn interface between base stations.

[0167] Base station 1 (9-2) can transmit a downlink signal or indication (e.g., indication to start measurement of cell 2) to the terminal in step 8-7 so that a specific cell (e.g., Cell 2) can recognize that a future RS (e.g., SSB) transmission will begin and the terminal can start measurement of the RS (9-7). The signal may be a signal disclosed in at least one of FIG. 3, FIG. 4, FIG. 5, or FIG. 6. For example, it may be a signal transmitted in the downlink disclosed in step 3-5 of FIG. 3. Alternatively, it may be a signal that is a modified version of an existing signal (e.g., SCell activation signal) disclosed in FIG. 5 or FIG. 6. Alternatively, it may be a new MAC signal (e.g., MAC-CE, etc.), a PHY signal (e.g., DCI, etc.), or an RRC signal (e.g., RRC Reconfiguration, etc.).

[0168] Base station 2 (9-3) can start RS (e.g., SSB) transmission for a specific cell (e.g., Cell 2) in step 9-8 (9-8). The terminal can start measurement for a specific cell (e.g., Cell 2) in step 9-9 (9-9).

[0169] FIG. 10 is a diagram illustrating a procedure in which a terminal starts RS measurement of a base station according to an embodiment of the present disclosure.

[0170] Referring to FIG. 10, the terminal (10-1) is in a state where measurement for a specific cell (e.g., cell 2) has been suspended (10-4). The terminal's suspension of measurement for a specific cell (e.g., cell 2) may be for power conservation as a result of receiving a downlink signal from a base station.

[0171] Base station 2 (10-3) may decide to start transmitting RS (e.g., SSB) of a specific cell (e.g., Cell 2) at step 10-5 (10-5).

[0172] Base station 2 (10-3) can transmit a downlink signal or indication (e.g., indication to start measurement of cell 2) to the terminal in step 10-6 so that the terminal can start measuring RS (e.g., SSB) after a specific cell (e.g., Cell 2) starts transmitting the RS in the future. The signal may be a signal disclosed in at least one of FIG. 3, FIG. 4, FIG. 5, or FIG. 6. For example, it may be a signal transmitted in the downlink disclosed in step 3-5 of FIG. 3. Or, it may be a signal that is a modified version of an existing signal disclosed in FIG. 5 or FIG. 6 (e.g., SCell activation signal). Or, it may be a new MAC signal (e.g., MAC-CE, etc.), a PHY signal (e.g., DCI, etc.), or an RRC signal (e.g., RRC Reconfiguration).

[0173] Base station 2 (10-3) can start RS (e.g., SSB) transmission for a specific cell (e.g., Cell 2) in step 10-7 (10-7). The terminal can start measurement for a specific cell (e.g., Cell 2) in step 10-8 (10-8).

[0174] FIG. 11 is a diagram illustrating the structure of a base station according to one embodiment of the present disclosure.

[0175] Referring to FIG. 11, a base station may include a transceiver, a control unit, and a storage unit. The transceiver, control unit, and storage unit may operate according to the communication method of the base station described above. Furthermore, network devices may also correspond to the structure of the base station. 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. For example, the base station may include a transceiver and a control unit. Furthermore, the transceiver, control unit, and storage unit may be implemented in the form of a single chip.

[0176] The transceiver is a general term for the receiver and transmitter of the base station, and can transmit and receive signals with terminals, other base stations, or other network devices. At this time, the transmitted and received signals may include control information and data. The transceiver may transmit system information to the terminal, for example, and may transmit a synchronization signal or a reference signal. To this end, the transceiver may 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-downconverts the 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. The transceiver may include wired and wireless transceivers, and may include various configurations for transmitting and receiving signals. In addition, the transceiver may receive a signal through a communication channel (e.g., a wireless channel), output it to the control unit, and transmit the signal output from the control unit through the communication channel. Additionally, the transceiver unit can receive a communication signal and output it to the processor, and transmit the signal output from the processor to a terminal, another base station, or another entity via a wired or wireless network.

[0177] The storage unit can store programs and data required for the operation of the base station. Furthermore, the storage unit can store control information or data included in signals acquired from the base station. The storage unit can be configured as a storage medium, such as a ROM, RAM, hard disk, CD-ROM, or DVD, or a combination of storage media. Furthermore, the storage unit can store at least one of information transmitted and received through the transceiver unit and information generated through the control unit.

[0178] In the present disclosure, the control unit may be defined as a circuit, an application-specific integrated circuit, or at least one processor. The processor may include a communication processor (CP) that performs control for communication and an application processor (AP) that controls upper layers such as application programs. The control unit may control the overall operation of the base station according to the embodiments proposed in the present disclosure. For example, the control unit may control the signal flow between each block to perform operations according to the flowchart described above.

[0179] FIG. 12 is a diagram illustrating the structure of a terminal according to an embodiment of the present disclosure.

[0180] Referring to FIG. 12, the terminal may include a transceiver, a control unit, and a storage unit. The transceiver, control unit, and storage unit may operate according to the communication method of the terminal described above. However, the components of the terminal are not limited to the examples described above. For example, the terminal may include more or fewer components than the components described above. For example, the terminal may include a transceiver and a control unit. Furthermore, the transceiver, control unit, and storage unit may be implemented in the form of a single chip.

[0181] The transceiver refers to the receiver and transmitter of a terminal, and can transmit and receive signals with a base station, another terminal, or a network entity. The signals transmitted and received with the base station may include control information and data. For example, the transceiver may receive system information from the base station, and may receive a synchronization signal or a reference signal. To this end, the transceiver may 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-downconverts the 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. In addition, the transceiver may include wired and wireless transceivers, and may include various components for transmitting and receiving signals. In addition, the transceiver may receive a signal through a wireless channel and output it to a control unit, and transmit a signal output from the control unit through the wireless channel. Additionally, the transceiver unit can receive a communication signal and output it to the processor, and transmit the signal output from the processor to a network entity via a wired or wireless network.

[0182] The storage unit can store programs and data necessary for the operation of the terminal. Additionally, the memory can store control information or data contained in signals acquired from the terminal. The storage unit can be comprised of a storage medium, such as ROM, RAM, a hard disk, CD-ROM, or DVD, or a combination of storage media.

[0183] In the present disclosure, the control unit may be defined as a circuit, an application-specific integrated circuit, or at least one processor. The processor may include a communication processor (CP) that performs control for communication and an application processor (AP) that controls upper layers such as application programs. The control unit may control the overall operation of the terminal according to the embodiments proposed in the present disclosure. For example, the control unit may control the signal flow between each block to perform operations according to the flowchart described above.

[0184] 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.

[0185] 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 invention.

[0186] 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.

[0187] Additionally, the program may be stored in 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 implementing an embodiment of the present invention via an external port. Additionally, a separate storage device on the communication network may be connected to a device implementing an embodiment of the present invention.

[0188] 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 invention is not limited to singular or plural components. Even components expressed in the plural form may be composed of singular elements, or even components expressed in the singular form may be composed of plural elements.

[0189] It should be noted that the configuration diagrams, example diagrams of control / data signal transmission methods, example diagrams of operating procedures, and configuration diagrams illustrated in the above FIGS. 1 to 12 are not intended to limit the scope of the present disclosure. That is, not all components, entities, or operational steps described in the above FIGS. 1 to 8 should be construed as essential components for carrying out the disclosure, and the disclosure may be implemented without detriment to its essence even if only some components are included.

[0190] The operations of the network entity or terminal described above can be realized by providing a memory device storing the corresponding program code within any component of the network entity or terminal device. That is, the control unit of the network entity or terminal device can execute the operations described above by reading and executing the program code stored in the memory device using a processor or CPU (Central Processing Unit).

[0191] The various components and modules of the network entity, base station or terminal device described in this specification may be operated using hardware circuits, such as logic circuits based on complementary metal oxide semiconductors, firmware, software and / or hardware and firmware and / or software embedded in a machine-readable medium. For example, various electrical structures and methods may be implemented using electrical circuits such as transistors, logic gates and application-specific semiconductors.

[0192] 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 the present invention. Therefore, the scope of the present invention 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 terminal in a wireless communication system, the method comprising: A step of receiving a radio resource control (RRC) message from a base station, the radio resource control (RRC) message including at least one setting for secondary cell (SCell) measurement; A step of receiving a signal related to a synchronization signal block (SSB) for the SCell based on the RRC message from the base station; and A method characterized by comprising a step of determining whether to measure the SCell based on the related signal.

2. In paragraph 1, a step of identifying whether the signal includes an indication related to a transmission state of the SSB; and A method characterized in that it further comprises a step of stopping measurement for the SCell based on the signal when the signal includes the instruction and when the instruction related to the transmission state indicates deactivation.

3. In paragraph 2, A method characterized by comprising: a step of performing a measurement on the SCell based on the signal, when the signal includes the instruction and when the instruction related to the transmission state indicates activation; 4. In paragraph 1, A method characterized in that the above signal is a medium access control (MAC) control element (CE).

5. A method performed by a base station in a wireless communication system, the method comprising: A step of transmitting, to a terminal, a radio resource control (RRC) message including at least one setting for secondary cell (SCell) measurement; and A step of transmitting a signal related to a synchronization signal block (SSB) for the SCell based on the RRC message to the terminal; A method characterized in that whether or not to measure the SCell is determined based on the above-mentioned related signal.

6. In paragraph 5, A method characterized in that, based on the signal, measurement for the SCell is stopped when the signal includes the instruction and the instruction related to the transmission state indicates deactivation.

7. In paragraph 6, A method characterized in that, when the signal includes an indication related to a transmission state of the SSB and when the indication related to the transmission state indicates activation, measurement is performed on the SCell based on the signal.

8. In paragraph 5, A method characterized in that the above signal is a medium access control (MAC) control element (CE).

9. In a terminal in a wireless communication system, the terminal: Transmitter and receiver; and A control unit coupled to the above transmitter and receiver, wherein the control unit: Receive a radio resource control (RRC) message from a base station, the radio resource control (RRC) message including at least one setting for secondary cell (SCell) measurement, From the base station, based on the RRC message, receive a signal related to a synchronization signal block (SSB) for the SCell, and A terminal characterized in that it determines whether to measure the SCell based on the above-mentioned related signal.

10. In paragraph 9, the control unit: Identifying whether the signal includes an indication related to the transmission status of the SSB, and A terminal characterized in that, based on the signal, measurement for the SCell is stopped when the signal includes the instruction and the instruction related to the transmission state indicates deactivation.

11. In paragraph 10, the control unit: A terminal characterized in that, when the signal includes the instruction and the instruction related to the transmission state indicates activation, a measurement is performed on the SCell based on the signal.

12. In paragraph 9, A terminal characterized in that the above signal is a medium access control (MAC) control element (CE).

13. In a base station in a wireless communication system, the base station: Transmitter and receiver; and A control unit coupled to the above transmitter and receiver, wherein the control unit: Transmitting a radio resource control (RRC) message to the terminal, the radio resource control (RRC) message including at least one setting for secondary cell (SCell) measurement, and A base station characterized in that, based on the RRC message, a signal related to a synchronization signal block (SSB) for the SCell is transmitted to the terminal, and based on the related signal, whether or not to measure the SCell is determined.

14. In paragraph 13, A base station characterized in that, when the signal includes the instruction and the instruction related to the transmission state indicates deactivation, measurement for the SCell is stopped based on the signal.

15. In paragraph 14, If the signal includes an indication related to the transmission state of the SSB and if the indication related to the transmission state indicates activation, a measurement is performed on the SCell based on the signal, and A base station, characterized in that the above signal is a medium access control (MAC) control element (CE).

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