Method and apparatus for operation for utilizing low-power wake-up radio in mobile communication system

Abstract

The present disclosure relates to a method performed by a terminal in a wireless communication system, and the method may comprise the steps of: receiving, from a base station, configuration information related to a condition for starting radio resource management (RRM) measurement relaxation, wherein the configuration includes a first condition for starting main radio (MR) measurement relaxation and a second condition for starting low-power radio (LR) measurement relaxation; and receiving, from the base station, each of a reference signal related to MR-based measurement and a reference signal related to LR-based measurement, wherein the MR measurement relaxation is started when the first condition is satisfied, and the first condition includes a condition in which a measurement result based on the reference signal related to the LR-based measurement is used, or includes the condition in which the measurement result based on the reference signal related to the LR-based measurement is used and a condition in which a measurement result based on the reference signal related to the MR-based measurement is used.

Description

Method and device for operation for utilizing low-power wake-up radio in mobile communication system

[0001] The present disclosure relates to operations of terminals and base stations in a wireless communication system, and more particularly, to a signal transmission and reception method and device for supporting idle and inactive mode operations of terminals in an environment where a base station and terminals can transmit a wake-up signal (hereinafter referred to as a WUS) to wake up the terminals or cells when the terminals, base stations, or cell transceivers enter a sleep mode in a next-generation 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] Meanwhile, in a non-terrestrial network system, methods and devices for supporting mobility using location information of terminals have been proposed, and for terminals that can utilize these, the need for a mobility support method that utilizes relative location measurement between the terminal and the network, which is different from the existing signal strength-based method, has emerged.

[0009] The present disclosure provides a signal transmission method and device that support idle and inactive mode operations of a terminal using a wake-up radio capable of transmitting and receiving a low-power wake-up signal to support power saving mode operation of a network in a wireless communication system.

[0010] An embodiment of the present disclosure may include an operation in which a terminal receives a reference signal from adjacent cells and base stations through wake-up radio (WUR) and new radio (NR) according to certain conditions, receives a signal including a certain trigger condition from a base station, determines whether a measurement value of the reference signal satisfies the condition, determines the trigger condition, and operates one RAT in a low power mode.

[0011] A method performed by a terminal in a wireless communication system, the method comprising: receiving, from a base station, configuration information related to a condition for starting radio resource management (RRM) measurement relaxation, the configuration including a first condition for starting main radio (MR) measurement relaxation and a second condition for starting low power radio (LR) measurement relaxation; and receiving, from the base station, a reference signal related to MR-based measurement and a reference signal related to LR-based measurement, respectively, wherein the MR measurement relaxation is started when the first condition is satisfied, and the first condition may include a condition in which a measurement result based on a reference signal related to LR-based measurement is used, or a condition in which a measurement result based on a reference signal related to LR-based measurement is used and a condition in which a measurement result based on a reference signal related to MR-based measurement is used.

[0012] A method performed by a base station in a wireless communication system, the method comprising: transmitting, to a terminal, configuration information related to a condition for starting radio resource management (RRM) measurement relaxation, the configuration including a first condition for starting main radio (MR) measurement relaxation and a second condition for starting low power radio (LR) measurement relaxation; and transmitting, to the terminal, a reference signal related to MR-based measurement and a reference signal related to LR-based measurement, respectively, wherein the MR measurement relaxation is started when the first condition is satisfied, and the first condition may include a condition in which a measurement result based on a reference signal related to LR-based measurement is used, or a condition in which a measurement result based on a reference signal related to LR-based measurement is used and a condition in which a measurement result based on a reference signal related to MR-based measurement is used.

[0013] In a wireless communication system, a terminal comprises: a transceiver; and a controller connected to the transceiver, wherein the controller receives, from a base station, configuration information related to a condition for starting radio resource management (RRM) measurement relaxation, the configuration including a first condition for starting main radio (MR) measurement relaxation and a second condition for starting low power radio (LR) measurement relaxation, and is configured to receive, from the base station, a reference signal related to MR-based measurement and a reference signal related to LR-based measurement, respectively, wherein the MR measurement relaxation is started when the first condition is satisfied, and the first condition may include a condition in which a measurement result based on a reference signal related to the LR-based measurement is used, or a condition in which a measurement result based on a reference signal related to the LR-based measurement is used and a condition in which a measurement result based on a reference signal related to the MR-based measurement is used.

[0014] In a wireless communication system, a base station comprises: a transceiver; and a controller connected to the transceiver, wherein the controller comprises: a step of transmitting, to a terminal, configuration information related to a condition for starting radio resource management (RRM) measurement relaxation, the configuration including a first condition for starting main radio (MR) measurement relaxation and a second condition for starting low power radio (LR) measurement relaxation; and a step of transmitting, to the terminal, a reference signal related to MR-based measurement and a reference signal related to LR-based measurement, respectively, wherein the MR measurement relaxation is started when the first condition is satisfied, and the first condition may include a condition in which a measurement result based on a reference signal related to the LR-based measurement is used, or a condition in which a measurement result based on a reference signal related to the LR-based measurement is used and a condition in which a measurement result based on a reference signal related to the MR-based measurement is used.

[0015] The technical problems to be achieved in various embodiments of the present disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by a person having ordinary skill in the technical field to which the present disclosure belongs from the description below.

[0016] According to one embodiment of the present disclosure, when more than one RAT is used in a wireless communication system, power consumption of a terminal can be further reduced by operating one RAT in a low power mode.

[0017] 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.

[0018] 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 disclosure.

[0019] FIG. 2 is a diagram for explaining the NES mode concept of a base station or cell according to one embodiment of the present disclosure.

[0020] FIG. 3 is a diagram illustrating an example of a WUS transmission procedure of a terminal according to an embodiment of the present disclosure.

[0021] FIG. 4 is a diagram illustrating an example of a WUS transmission procedure transmitted by a base station to a terminal according to an embodiment of the present disclosure.

[0022] FIG. 5 is a diagram illustrating an example in which a terminal according to an embodiment of the present disclosure sets a condition for entering a Deep Sleep mode and performs a Deep Sleep operation according to the condition.

[0023] FIG. 6 is a diagram illustrating an example in which a terminal according to an embodiment of the present disclosure sets a condition for exiting from Deep Sleep mode, terminates Deep Sleep operation according to the condition, and turns MR back on to an always-on state.

[0024] FIG. 7 is a diagram illustrating an example of a terminal having an LP-WUR according to an embodiment of the present disclosure performing signal transmission / reception and RRM Measurement Relaxation operations to reduce power by reducing RRM Measurement of MR or LP-WUR when operating in Idle / Inactive mode.

[0025] FIG. 8 is a diagram illustrating an example of setting an LP-WUR Tracking Area, or LP Tracking Area (LP-TA), and terminal operation while maintaining a Deep Sleep mode when a terminal having an LP-WUR according to an embodiment of the present disclosure operates in an Idle / Inactive mode.

[0026] FIG. 9 is a diagram illustrating an embodiment of a method for a terminal having LP-WUR to provide information to a base station before or after transitioning to Deep Sleep mode according to an embodiment of the present disclosure.

[0027] FIG. 10 is a diagram illustrating the structure of a base station according to one embodiment of the present disclosure.

[0028] FIG. 11 is a diagram illustrating the structure of a terminal according to an embodiment of the present disclosure.

[0029] The operating principles of the present disclosure are described in detail below with reference to the attached drawings. In the following description of the present disclosure, detailed descriptions of related known functions or configurations will be omitted if they are deemed to unnecessarily obscure the gist of the present disclosure. Furthermore, the terms described below are defined based on the functions of the present disclosure 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.

[0030] 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 as examples for convenience of explanation. Therefore, the present disclosure is not limited to the terms described below, and other terms referring to objects with equivalent technical meanings may be used.

[0031] Hereinafter, the base station is an entity that performs resource allocation of the terminal, and may be at least one of a gNode B, an eNode B, a Node B, a BS (Base Station), a wireless access unit, a base station controller, or a node on a network. The terminal may include a UE (User Equipment), an MS (Mobile Station), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing a communication function. In the present disclosure, downlink (DL) refers to a wireless transmission path of a signal transmitted from a base station to a terminal, and uplink (UL) refers to a wireless transmission path of a signal transmitted from a terminal to a base station. In addition, although the LTE or LTE-A system may be described below as an example, the embodiments of the present disclosure may also be applied to other communication systems having 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 the embodiments of the present disclosure may be applied, and 5G below may also be a concept that includes existing LTE, LTE-A, and other similar services. Furthermore, the present disclosure may be applied to other communication systems with some modifications, as determined by a person skilled in the art, without significantly departing from the scope of the present disclosure. It will be appreciated that each block of the processing flow diagrams and combinations of the flow diagrams can be executed by computer program instructions.

[0032] 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).

[0033] Additionally, each block may represent a module, segment, or portion of code that contains one or more executable instructions for executing a specific logical function(s). It should also be noted that in some alternative implementation examples, the functions mentioned in the blocks may occur out of order. For example, two blocks shown in succession may in fact be executed substantially simultaneously, or the blocks may sometimes be executed in reverse order depending on the corresponding function. In this case, the term '~unit' used in the present embodiment means software or a hardware component such as an FPGA (Field Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit), and the '~unit' may 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 and may be configured to execute one or more processors. Thus, as an example, the '~ unit' includes components such as software components, object-oriented software components, class components, and task components, processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functionality 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'. In addition, the components and '~ units' may be implemented to reproduce one or more CPUs within a device or a secure multimedia card. Also, in an embodiment, the '~ unit' may include one or more processors.

[0034] 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, this disclosure is not limited to these terms and names and can be equally applied to wireless communication networks that comply with other standards. For example, this disclosure can be applied to the 3GPP 5GS / NR (5th generation mobile communication standard).

[0035] 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 disclosure.

[0036] Referring to FIG. 1, a next-generation mobile communication system supporting network energy saving may be configured with a next-generation base station (1-01, g Node B, hereinafter referred to as gNB, Node B or base station), a cell (1-06, 1-07, 1-08), and a terminal (1-09, User Equipment (UE)). Here, the gNB may include a CU (1-02, Central Unit) and one or more DUs (1-03, 1-04, Distributed Units).

[0037] A CU can support one or more DUs, and a DU (1-03, 1-04) can support one cell (1-06, 1-07, 1-08), or one or more cells (1-06, 1-07, 1-08).

[0038] UE(1-09) can access an external network via gNB through cell.

[0039] FIG. 2 is a diagram for explaining the NES mode concept of a base station or cell according to one embodiment of the present disclosure.

[0040] Referring to FIG. 2, a base station supporting the Wake Up Radio (WUR) function may be referred to as a WUR BS (2-1), and a terminal supporting the Wake Up Radio (WUR) function may be referred to as a WUR UE (2-4). At this time, the WUR BS (2-1) may have a Main Radio (2-2, MR) for performing wireless communication with the WUR UE and a WUR (2-3) for performing a Wake Up operation, and the WUR UE (2-4) may have a Main Radio (2-5, MR) for performing wireless communication with the WUR BS (2-1) and a WUR (2-6) for performing a Wake Up operation. The MR (2-2) of the WUR BS (2-1) can perform wireless communication with the MR (2-5) of the WUR UE (2-4) or other UE, and the WUR (2-3) of the WUR BS (2-1) can perform wireless communication with the WUR (2-6) of the WUR UE (2-4).

[0041] According to one embodiment of the present disclosure, the WUR may be a single, but logically distinct, module, rather than two physically different modules as part of the MR.

[0042] According to one embodiment of the present disclosure, the WUR may be a part of the MR, both physically and logically.

[0043] In the present disclosure, WUR may be referred to as LP-WUR with Low Power attached, or may be referred to as LR, LPR, or the like for Low Power Radio.

[0044] WUR BS and WUR UE may be (may have) in the following operational configuration states:

[0045] 1. Full On state with both MR and WUR turned on

[0046] 2. MR On state where only MR is on and WUR is off

[0047] 3. Deep Sleep state where MR is (fully or partially) turned off and only WUR is turned on.

[0048] 4. Full Off state where MR and WUR are both (completely or partially) turned off.

[0049] 5. Light Sleep state where MR is on but some signals such as SSB, SIB, etc. are not transmitted and power is saved.

[0050] The Deep Sleep mode of the terminal described in 3 above can be defined by one of the following definitions.

[0051] - A mode in which the terminal turns off all or part of the circuits and operations related to MR, so that wireless communication is not possible at all through MR, and cellular wireless communication is performed through LP-WUR.

[0052] - A mode in which the terminal mostly turns off all or part of the circuits and operations related to MR and does not perform wireless communication via MR, but only transmits and receives messages via LP-WUR. However, it can also wake up briefly to perform reception via MR during certain resources designated by the network. Here, the above-mentioned certain resources may be, for example, periodic paging occasions for transmitting and receiving paging.

[0053] FIG. 3 is a diagram illustrating an example of a WUS transmission procedure of a terminal according to an embodiment of the present disclosure.

[0054] Referring to FIG. 3, a terminal (3-1) can receive a signal (3-4) from a serving cell base station (3-2) to which the terminal (3-1) is connected (connected), and the signal (3-4) can include setting information including conditions for the terminal to transmit WUS.

[0055] According to one embodiment of the present disclosure, the terminal (3-1) can receive a condition for transmitting WUS using a measurement value for the serving cell (3-2) or an adjacent cell (3-3) from the serving cell via a signal (3-4). The serving cell (3-2) can set various conditions, such as having the terminal (3-1) measure a reference signal (e.g., SSB or CSI-RS, etc.) to derive a reference signal and a measurement value of the cell, and compare the derived measurement value with a threshold value set by the serving cell, thereby setting a trigger for the terminal to transmit WUS based on the measurement result.

[0056] In order for a terminal to successfully transmit a WUS to adjacent cells, the serving cell (or the base station to which the cell belongs) must provide the terminal with resource information on which adjacent cells are capable of receiving the WUS.

[0057] The serving cell determines which neighboring cells with overlapping coverage within its coverage can receive WUS through which resources (time, frequency) and in which manner (periodic, aperiodic, ...), and shares the determined information with the neighboring cells.

[0058] A base station of a serving cell can transmit a signal containing at least one of the following WUS resource information to a terminal.

[0059] - Resource information such as time / frequency at which the terminal can transmit WUS,

[0060] ■ Resource information including information about subframe / raioframe / slot time that has a certain rule that repeats periodically, for example.

[0061] ■ Resource information including information on the WUS transmission time duration, expressed in terms of absolute time, number of slots, number of frames, etc.

[0062] ■ Resource information including information on the time interval between the time of receiving signal (3-4) and the time when the terminal can transmit WUS, expressed as absolute time, number of slots, number of frames, timer, etc., to indicate the start time when the terminal can transmit WUS after a certain period of time after receiving signal (3-4).

[0063] ■ Resource information, including information about the ID of a frequency band indicating (representing) a certain frequency band, for example;

[0064] ■ Resource information including, for example, the ID of the resource block that supports (indicates) a certain starting frequency, the bandwidth that supports (indicates) the frequency bandwidth, the number of unit resource block frequency bandwidths, etc.

[0065] ■ Resource information including, for example, the ID of the reference frequency to indicate (indicate) the starting frequency away from a certain reference frequency, the bandwidth indicating (indicating) the difference between the reference frequency and the starting frequency, the number of unit resource block frequency bandwidths, etc.

[0066] - A sequence ID or list of sequence IDs that can specify sequences that can be transmitted to WUS (or sequences that can be used for WUS transmission).

[0067] - An ID of information or a list of information IDs indicating (indicating) the type of information that can be transmitted to WUS (or information that can be transmitted using WUS).

[0068] - A list of condition IDs or condition IDs indicating the type of condition that can transmit WUS (or the conditions under which WUS can be transmitted).

[0069] - An indication that the terminal can transmit WUS when the base station is operating in Deep Sleep mode.

[0070] At least one of the WUS resource information described above may be information of a base station transmitting a signal (3-4).

[0071] At least one of the WUS resource information described above may be information on a neighboring base station (or cell) of the base station transmitting the signal (3-4), in which case a base station ID or cell ID or a base station ID list or a cell ID list may be included in the information on the neighboring base station (or cell).

[0072] At least one of the WUS resource information described above may be applied to one or more base stations or cells, and in this case, a list of base station IDs or cell IDs that can use WUS transmission information (WUS resource information) may be included in the WUS transmission information.

[0073] At least one of the WUS resource information described above may be equally applicable to all adjacent base stations or cells (cell common information), and in this case, may include an indicator (e.g., 1 bit indication) that notifies the terminal of the relevant information.

[0074] At least one of the WUS resource information described above may have a structure and format similar to or identical to the PRACH (Physical Random Access Channel) configuration information.

[0075] The WUS transmitted by the terminal may contain at least one of the following information:

[0076] - Sequence transmitted by the terminal to WUS

[0077] - ID of the terminal that transmitted WUS

[0078] - Part of the ID of the terminal that transmitted the WUS

[0079] - Purpose ID that identifies the purpose of the WUS transmitted by the terminal

[0080] ■ For example, a terminal may transmit a WUS to request SSB transmission, and may transmit a destination ID indicating that it is a WUS transmission to request SSB transmission.

[0081] ■ For example, a terminal can transmit a WUS for handover and transmit a purpose ID indicating that it is transmitting a WUS for handover.

[0082] The destination ID that can be included in the WUS transmitted by the terminal is specified in the specification and may be known in advance by both the terminal and the base station.

[0083] The purpose ID that can be included in the WUS transmitted by the terminal can be set by some function of the core network, such as AMF, to the base station and the terminal.

[0084] The destination ID that can be included in the WUS transmitted by the terminal can be set by the base station to the terminal. The destination ID can be included in the broadcast signal transmitted by the base station to the terminal (e.g., the master information block (MIB) or system information block (SIB) included in the SSB). In addition, the destination ID can be included in the unicast signal transmitted by the base station to specifically target the terminal (e.g., an RRC signal, a MAC signal, or a PHY signal).

[0085] Information that can be set to the terminal by the AMF, etc., or the base station may include an indicator that can distinguish the cell currently operating in Deep Sleep mode, for example, an indicator in the form of including a 1-bit indicator in each cell information.

[0086] Information that can be set to the terminal by the AMF, etc., or the base station may include an indicator that can distinguish the cell in which the MR is currently on, for example, an indicator in the form of including a 1-bit indicator in each cell information.

[0087] Information that can be set to a terminal by AMF, etc., or a base station may implicitly imply that all cells included in the information are operating in deep sleep mode. In other words, the base station may configure and transmit this information only for cells currently operating in deep sleep.

[0088] Information that can be set to the terminal by the AMF, etc., or the base station may be included in a broadcast signal transmitted by the base station to the terminal (e.g., a master information block (MIB) included in an SSB, or any system information block (SIB)).

[0089] Additionally, information that can be set to a terminal by AMF, etc., or a base station may be transmitted by being included in a unicast signal (e.g., an RRC signal, a MAC signal, or a PHY signal) that the base station transmits to a specific terminal.

[0090] Resource information for WUS transmission of a terminal may be provided in advance to the terminal from the base station via a predetermined signal (e.g., a broadcast signal or an RRC signal) prior to the transmission time of the trigger setting signal for WUS transmission. Alternatively, the resource information for WUS transmission may be included in a single signal (e.g., an RRC signal) together with the trigger setting signal for WUS transmission.

[0091] According to one embodiment of the present disclosure, the terminal (3-1) can determine whether the WUS Trigger condition set through the WUS configuration signal (3-3) transmitted by the base station (3-2) is satisfied based on reference signals of base stations transmitted by the serving cell and neighboring cells (e.g., SSB (Sync Signal Block) transmitted by MR or LP-SS (Low Power Synchronization Signal), which is a synchronization signal transmitted by LP-WUR) (3-5). More specifically, the terminal can receive reference signals of base stations transmitted by the serving cell and neighboring cells, measure representative values ​​of each cell through the received reference signals, and compare the measured representative values ​​with the set WUS Trigger condition to determine whether WUS transmission is triggered (3-5).

[0092] According to one embodiment of the present disclosure, when it is determined that the WUS Trigger condition is satisfied, the terminal (3-1) can transmit an LP-WUS signal to neighboring cells through the set WUS resource (3-6).

[0093] According to one embodiment of the present disclosure, if a neighboring cell that has received a WUS is operating in sleep mode, it can exit sleep mode by making a decision based on at least one of the following conditions (3-7). At this time, if the neighboring cell's base station is in deep sleep mode, the main radio (MR) can be woken up. Additionally, if the neighboring cell's base station is in light sleep mode, SSB / SIB transmission can be initiated.

[0094] - When receiving WUS, it wakes up unconditionally.

[0095] - Occurs when the received power of WUS exceeds a certain threshold.

[0096] - Occurs when the received power of WUS exceeds a certain threshold set by some function of the network, for example, AMF, etc.

[0097] - Occurs when the received power of WUS exceeds a certain threshold provided by the neighboring cell.

[0098] Afterwards, the MR of the awakened adjacent cell can transmit a synchronization signal block (SSB) to the adjacent terminals (3-8).

[0099] FIG. 4 is a diagram illustrating an example of a WUS transmission procedure transmitted by a base station to a terminal according to an embodiment of the present disclosure.

[0100] Referring to Fig. 4, the terminal (4-1) and the serving cell (4-2) each include MRs (4-3, 4-5) and LP-WURs (4-4, 4-6) as components. The serving cell (4-2) can transmit a WUS (4-8) to the terminal operating in the Deep Sleep mode to cause it to exit the Deep Sleep mode (4-9) and wake up the MR (4-10).

[0101] In addition, the above LP-WUS can be used as a downlink signal that triggers at least one of the following operations.

[0102] 1. When a terminal in Idle / Inactive mode receives a downlink LP-WUS signal, the downlink LP-WUS signal can be used as a signal to trigger the terminal to receive network paging in the next paging occasion.

[0103] A. In order to use the downlink LP-WUS signal as in 1. above, the base station may transmit LP-WUS configuration information including an indicator informing the terminal to perform the operation of 1. above when receiving the LP-WUS to the terminal in advance via MR or LP-WUR.

[0104] 2. When an Idle / Inactive mode terminal receives a downlink LP-WUS signal, the downlink LP-WUS signal can be used as a signal to trigger the terminal to receive a PEI signal indicating that there is paging in the network during the subsequent PEI signal reception period.

[0105] A. In order to use the downlink LP-WUS signal as in 2. above, the base station may transmit LP-WUS configuration information including an indicator informing the terminal to perform the operation of 2. above when receiving the LP-WUS to the terminal in advance via MR or LP-WUR.

[0106] FIG. 5 is a diagram illustrating an embodiment in which a terminal according to one embodiment of the present disclosure is set to enter a Deep Sleep mode, and the terminal performs a Deep Sleep operation according to the condition.

[0107] According to Fig. 5, the terminal (5-1) and the serving cell (5-2) may each include MRs (5-3, 5-5) and LP-WURs (5-4, 5-6) as components. The serving cell (5-2) may set conditions for the terminal to initiate a Deep Sleep operation and provide parameters to be used for the conditions (used in configuring the conditions) (5-7).

[0108] Conditions under which a terminal can enter Deep Sleep mode can be configured as different (distinct) conditions depending on the status of the terminal (e.g., Idle / Inactive / Connected status), and can be set to the terminal in the form of a set of different (distinct) conditions and parameters related to (corresponding to) each condition.

[0109] The signal for setting the conditions under which the terminal can enter the Deep Sleep mode and the signal providing the parameters related to the conditions (corresponding to the conditions) may be one signal or different signals, and may be a Unicast message transmitted to a specific terminal or a Broadcast message (SSB, MIB, SIB, Paging) transmitted to an unspecified number of terminals. The configuration information for the conditions under which the terminal can enter the Deep Sleep mode and the parameters related to the conditions (corresponding to the conditions) may be an RRC message (RRC Reconfig / RRC Release, SIB, MIB), a MAC message including MAC CE, or a DCI message of the PHY layer.

[0110] The signal for setting the conditions under which the terminal can enter the Deep Sleep mode and the signal providing the parameters related to the conditions (corresponding to the conditions) may be two different signals, and each of the two different signals may be messages transmitted through different layers or different transmission methods. For example, each of the two different signals may be a unicast message transmitted to a specific terminal, or a broadcast message (SSB, MIB, SIB, Paging) transmitted to an unspecified number of terminals. The configuration information for the conditions under which the terminal can enter the Deep Sleep mode and the parameters related to the conditions (corresponding to the conditions) may be an RRC message (RRC Reconfig, SIB, MIB), a MAC message including MAC CE, or a DCI message of the PHY layer.

[0111] According to one embodiment of the present disclosure, a terminal receives reference signals (e.g., SSB and CSI-RS) transmitted periodically from a base station via MR (NR) or from a set resource (5-9), and inputs measurement values ​​of the received reference signals into a cell representative value measurement model to derive MR measurement values ​​of the corresponding cell (5-8).

[0112] In addition, similarly, the terminal can receive reference signals (e.g., LP-SS) transmitted periodically from the base station via LP-WUR (LR) or from a set resource (5-10), and input the measurement values ​​of the received reference signals into the cell representative value measurement model to derive the LP-WUR (LR) measurement value of the corresponding cell (5-8).

[0113] According to one embodiment of the present disclosure, thereafter, the terminal determines whether any measurement value satisfies a condition set by the network for the terminal to start a Deep Sleep operation (5-11), and if it is determined that the condition is satisfied, the terminal can transition to a Deep Sleep mode (5-12).

[0114] According to one embodiment of the present disclosure, the terminal may be a terminal in Idle / Inactive mode, and in the case of a terminal in Idle / Inactive mode, the terminal may receive an entry condition (5-7) for transitioning to Deep Sleep from a serving cell base station (5-2) as an RRC message (e.g., a message such as RRC release) before transitioning to the Idle / Inactive mode.

[0115] In addition, the terminal in the Idle / Inactive mode may compare the measurement values ​​of each cell measured by MR and LP-WUR (5-8) with a threshold value included in any signal (e.g., a type of MIB or SIB signal (5-7)) broadcast by the cell on which the terminal is camped to determine whether the entry conditions for transitioning to the Deep Sleep mode are satisfied (5-11).

[0116] According to one embodiment of the present disclosure, the terminal may be a terminal in connected mode, and in the case of a terminal in connected mode, the terminal may receive an entry condition (5-7) for transitioning to Deep Sleep from a serving cell base station (5-2) as an RRC message (e.g., a message such as RRC reconfiguration).

[0117] In addition, the terminal may compare the measurement values ​​of each cell measured by MR and LP-WUR (5-11) with a threshold value included in any signal (e.g., a type of MIB or SIB signal (5-7)) broadcast by the serving cell (5-8) to determine whether the entry conditions for transitioning to Deep Sleep mode are satisfied.

[0118] According to one embodiment of the present disclosure, a terminal may be configured to transition to a Deep Sleep mode when at least one condition (some, a combination, or all) among the following conditions is set by a base station, and the terminal determines that the set condition is satisfied. More specifically, the terminal may be configured to transition to a Deep Sleep mode when the terminal determines that both Event A1 of LR (hereinafter referred to as Condition 2 [2.]) and Low mobility of MR (hereinafter referred to as Condition 3 [3.]) are satisfied, and the terminal may be configured to set a threshold for determining each condition, or may receive an additional signal (e.g., SIB transmitted by a network), and then determine whether to transition to a Deep Sleep mode based on the setting (5-11).

[0119] 1. Event A1 of MR (Serving MR becomes better than threshold)

[0120] The terminal can compare the threshold value transmitted (included in the signal (5-7) (MIB, SIB, RRC Reconfiguration, RRC Release, MAC-CE, DCI, etc.) by the base station with the measurement value for the serving cell, and if the MR measurement value of the serving cell is greater than the threshold value, the terminal can transition to Deep Sleep mode. The terminal operation according to this condition 1. can be set / defined as shown in Table 1 below.

[0121]

[0122] Of course, the above event A1 can be replaced with a condition that compares a threshold and a cell measurement value, as shown in Tables 2 and 3 below.

[0123]

[0124]

[0125] Of course, the above event A1 can be replaced with a condition that compares two thresholds and two cell measurements, as shown in Table 4 below.

[0126]

[0127] 2. Event A1 of LR (Serving LR becomes better than threshold)

[0128] The terminal can compare the threshold value transmitted (included in the signal (5-7) (MIB, SIB, RRC Reconfiguration, RRC Release, MAC-CE, DCI, etc.) by the base station with the measurement value for the serving cell, and if the LR measurement value of the serving cell is greater than the threshold value, the terminal can transition to Deep Sleep mode. The terminal operation according to this condition 2. can be set / defined as shown in Table 5 below.

[0129]

[0130] Of course, the above event A1 can be replaced with a condition that compares a threshold and a cell measurement value, as shown in Tables 6 and 7 below.

[0131]

[0132]

[0133] Of course, the above event A1 can be replaced with a condition that compares two thresholds and two cell measurements, as shown in Table 8 below.

[0134]

[0135] 3. Low mobility of MR (Serving MR measurement indicates the UE has low mobility)

[0136] The terminal periodically measures the MR reference signal of the serving cell and updates a reference value (Srxlev) according to the conditions as shown in Table 9 below. Ref ) and the current measurement value (Srxlev) transmitted by the base station as a signal (5-7) (MIB, SIB, RRC Reconfiguration, RRC Release, MAC-CE, DCI, etc.) (included in the MR threshold (S SearchDeltaP ) and, if the conditions in Table 9 are satisfied, the terminal can transition to Deep Sleep mode. The terminal operation according to this condition 3. can be set / defined as in Table 9 below.

[0137]

[0138] 4. Low mobility of LR (Serving LR measurement indicates the UE has low mobility)

[0139] The terminal periodically measures the LR reference signal of the serving cell and updates a reference value (Srxlev) according to the conditions as shown in Table 10 below. Ref ) and the current measurement value (Srxlev), the LR threshold (S) transmitted (included in) by the base station as a signal (5-7) (MIB, SIB, RRC Reconfiguration, RRC Release, MAC-CE, DCI, etc.) SearchDeltaP ) and, if the conditions in Table 10 are satisfied, the terminal can transition to Deep Sleep mode. The terminal operation according to this condition 4. can be set / defined as in Table 10 below.

[0140]

[0141] FIG. 6 is a diagram illustrating an example in which a terminal according to an embodiment of the present disclosure sets a condition for exiting from Deep Sleep mode, terminates Deep Sleep operation according to the condition, and performs an operation for turning MR back on to an always on state.

[0142] Referring to Fig. 6, the terminal (6-1) and the serving cell (6-2) may each include MRs (6-3, 6-5) and LP-WURs (6-4, 6-6) as components. The serving cell (6-2) may set conditions for the terminal to terminate the Deep Sleep operation and wake up the MR again to start the Always on operation, and may provide parameters to be used for the conditions (used in configuring the conditions) (6-7).

[0143] Conditions under which a terminal can exit Deep Sleep mode can be configured as different (distinct) conditions depending on the status of the terminal (e.g., Idle / Inactive / Connected status), and can be set to the terminal in the form of a set of different (distinct) conditions and parameters related to (corresponding to) each condition.

[0144] The signal for setting the conditions under which the terminal can exit the Deep Sleep mode and the signal providing the parameters related to the conditions (corresponding to the conditions) may be one signal or different signals, and may be a Unicast message transmitted to a specific terminal or a Broadcast message (SSB, MIB, SIB, Paging) transmitted to an unspecified number of terminals. The configuration information for the conditions under which the terminal can enter the Deep Sleep mode and the parameters related to the conditions (corresponding to the conditions) may be an RRC message (RRC Reconfig / RRC Release, SIB, MIB), a MAC message including MAC CE, or a DCI message of the PHY layer.

[0145] The signal for setting the condition for the terminal to exit the Deep Sleep mode and the signal providing the parameter related to the condition (corresponding to the condition) may be two different signals, and each of the two different signals may be a message transmitted through a different layer or a different transmission method. For example, each of the two different signals may be a unicast message transmitted to a specific terminal, or a broadcast message (SSB, MIB, SIB, Paging) transmitted to an unspecified number of terminals. The configuration information for the condition for the terminal to enter the Deep Sleep mode and the parameter related to the condition (corresponding to the condition) may be an RRC message (RRC Reconfig, SIB, MIB), a MAC message including MAC CE, or a DCI message of the PHY layer.

[0146] According to one embodiment of the present disclosure, a terminal may receive reference signals (e.g., SSB and CSI-RS) transmitted periodically from a base station via MR (NR) or from a set resource (6-9), and input measurement values ​​of the received reference signals into a cell representative value measurement model to derive MR measurement values ​​of the corresponding cell (6-8).

[0147] In addition, similarly, the terminal can receive reference signals (e.g., LP-SS) transmitted periodically from the base station via LP-WUR (LR) or from a set resource (6-10), and input the measurement values ​​of the received reference signals into the cell representative value measurement model to derive the LP-WUR (LR) measurement value of the corresponding cell (6-8).

[0148] According to one embodiment of the present disclosure, thereafter, the terminal determines whether a measurement value satisfies a condition set by the network for the terminal to terminate the Deep Sleep operation (6-11), and if the condition is determined to be satisfied, the terminal can terminate the Deep Sleep mode and change the MR to the always on mode (6-12).

[0149] According to one embodiment of the present disclosure, the terminal may be a terminal in Idle / Inactive mode, and in the case of a terminal in Idle / Inactive mode, the terminal may receive an entry condition (6-7) for transitioning from Deep Sleep to normal mode from a serving cell base station (6-2) as an RRC message (e.g., a message such as RRC release) before transitioning to Idle / Inactive mode.

[0150] In addition, the terminal in the Idle / Inactive mode can compare the measurement values ​​of each cell measured by MR and LP-WUR (6-11) with a threshold value included in any signal (e.g., a type of MIB or SIB signal (6-7)) broadcast by the cell on which the terminal is camped (6-8) to determine whether the entry conditions for transitioning from Deep Sleep to normal mode are satisfied.

[0151] According to one embodiment of the present disclosure, the terminal may be a terminal in connected mode, and in the case of a terminal in connected mode, the terminal may receive an entry condition (6-7) for transitioning from Deep Sleep to normal mode from a serving cell base station (6-2) as an RRC message (e.g., a message such as RRC reconfiguration).

[0152] In addition, the terminal may compare the measurement values ​​of each cell measured by MR and LP-WUR (6-11) with a threshold value included in any signal (e.g., a type of MIB or SIB signal (6-7)) broadcast by the serving cell (6-8) to determine whether the entry conditions for transitioning from Deep Sleep to normal mode are satisfied.

[0153] According to one embodiment of the present disclosure, a terminal may be configured to transition from Deep Sleep to normal mode when at least one condition (some, a combination, or all) of the following conditions is set by a base station, and the terminal determines that the set condition is satisfied. More specifically, the terminal may be configured to transition from Deep Sleep mode to normal mode when the terminal determines that both Event A2 of LR (hereinafter referred to as Condition 2 [2.]) and Not Low mobility of MR (hereinafter referred to as Condition 3 [3.]) are satisfied, and the terminal may be configured to set a threshold for determining each condition, or may receive an additional signal (e.g., SIB transmitted by a network), and then determine whether to transition from Deep Sleep mode to normal mode based on the setting (6-11).

[0154] 1. Event A2 of MR (Serving MR becomes worse than threshold)

[0155] According to one embodiment of the present disclosure, the terminal may compare the threshold value transmitted (included in the signal (6-7) (MIB, SIB, RRC Reconfiguration, RRC Release, MAC-CE, DCI, etc.) by the base station with the measurement value for the serving cell, and if the MR measurement value of the serving cell is smaller than the threshold value, the terminal may transition from Deep Sleep to normal mode. The terminal operation according to this condition 1. may be set / defined as shown in Table 11 below.

[0156]

[0157] Event A2 can of course be replaced with a condition that compares a threshold and cell measurement values, as shown in Tables 12 and 13 below.

[0158]

[0159]

[0160] Event A2 can of course be replaced with a condition that compares two thresholds and two cell measurements, as shown in Table 14 below.

[0161]

[0162] 2. Event A2 of LR (Serving LR becomes worse than threshold)

[0163] According to one embodiment of the present disclosure, the terminal may compare the threshold value transmitted (included in the signal (6-7) (MIB, SIB, RRC Reconfiguration, RRC Release, MAC-CE, DCI, etc.) by the base station with the measurement value for the serving cell, and if the LR measurement value of the serving cell is smaller than the threshold value, the terminal may transition from Deep Sleep to normal mode. The terminal operation according to this condition 2. may be set / defined as shown in Table 15 below.

[0164]

[0165] 3. Not Low mobility of MR (Serving MR measurement indicates the UE is not in a low mobility)

[0166] According to one embodiment of the present disclosure, the terminal periodically measures the MR reference signal of the serving cell and updates any reference value (Srxlev) according to the conditions as shown in Table 16 below. Ref ) and the current measurement value (Srxlev) transmitted by the base station as a signal (6-7) (MIB, SIB, RRC Reconfiguration, RRC Release, MAC-CE, DCI, etc.) (included in the MR threshold (S SearchDeltaP ) and, if the conditions in Table 16 are satisfied, the terminal can transition from Deep Sleep mode to normal mode. The terminal operation according to this condition 3. can be set / defined as in Table 16 below.

[0167]

[0168] 4. Not Low mobility of LR (Serving LR measurement indicates the UE is not in a low mobility)

[0169] According to one embodiment of the present disclosure, the terminal periodically measures the LR reference signal of the serving cell and updates any reference value (Srxlev) according to the conditions of Table 17 below. Ref ) and the current measurement value (Srxlev), the LR threshold (S) transmitted (included in) by the base station as a signal (6-7) (MIB, SIB, RRC Reconfiguration, RRC Release, MAC-CE, DCI, etc.) SearchDeltaP) and, if the conditions in Table 17 are satisfied, the terminal can transition from Deep Sleep mode to normal mode. The terminal operation according to this condition 4. can be set / defined as in Table 17 below.

[0170]

[0171] If the terminal is operating in Deep Sleep mode and cannot measure MR, or if the terminal cannot measure LR due to rapid movement of the terminal or change in channel, or if the terminal cannot measure one Radio access technology (RAT) (e.g., one or more of MR or LR), the terminal can make the following judgments.

[0172] - (Judgment 1) Even if the terminal is configured by the serving cell to exit Deep Sleep by comprehensively considering the measurement results and evaluation results of different RATs, the terminal can exit Deep Sleep only by considering the measurements of available RATs if there is an unavailable RAT. More specifically, even if the terminal is configured to exit Deep Sleep only when both the MR measurement results and the LR measurement results of the camped cell are bad, if the MR of the current terminal is in Sleep mode and thus MR measurement is impossible, the terminal can exit Deep Sleep by comparing only the LR measurement result with the LR threshold.

[0173] - (Judgment 2) If the set conditions and the type of RAT that can be measured do not match, the terminal can immediately exit Deep Sleep. More specifically, if the terminal is configured to exit Deep Sleep when LR is below a certain threshold, and LR measurement is impossible or becomes difficult, the terminal can immediately exit Deep Sleep.

[0174] - At this time, the operations according to (Judgment 1) and / or (Judgment 2) above may be available to the terminal when the terminal receives a signal from the base station including an indicator allowing the terminal to perform the operations (6-7).

[0175] FIG. 7 is a diagram illustrating an example of a terminal performing signal transmission / reception and RRM Measurement Relaxation operations when operating in Idle / Inactive mode according to an embodiment of the present disclosure.

[0176] More specifically, the terminal of FIG. 7 may be a terminal having LP-WUR, and the signal transmission / reception and RRM Measurement Relaxation operations performed by the terminal in the Idle / Inactive mode described in FIG. 7 may be operations performed to reduce RRM Measurement of MR or LP-WUR to save power.

[0177] Referring to FIG. 7, a serving cell (7-2) can set a condition for a terminal (7-1) to initiate an operation that can alleviate RRM measurement, and can provide parameters to be used for the condition (used in configuring the condition) (7-3).

[0178] According to one embodiment of the present disclosure, RRM Measurement Relaxation, or RRM measurement relaxation operation, may be an operation that increases the RRM reference signal measurement period of each RAT periodically performed by the terminal by several times compared to the existing one. At this time, the RRM reference signal measurement of each RAT may be performed to periodically update the measurement values ​​of different cells that change over time due to the location of the terminal, etc. In addition, RRM Measurement Relaxation, or RRM measurement relaxation operation, may be an operation that is effective in saving terminal power by not performing RRM for a specific RAT, thereby reducing the power consumed by the terminal for signal measurement, and allowing the terminal to operate in sleep mode for a longer period of time.

[0179] According to one embodiment of the present disclosure, the terminal may then transition to Idle or Inactive mode when a certain condition is satisfied (7-4).

[0180] According to one embodiment of the present disclosure, a terminal operating in Idle / Inactive mode may be camped on a cell with the best performance and measure SSB (7-6) of MR and LP-SS (7-7) of LP-WUR transmitted by the cell with the best performance and adjacent cells (7-5).

[0181] According to one embodiment of the present disclosure, a base station inputs threshold values ​​(thresholds) contained in a signal (7-3) set as a condition for performing RRM Measurement Relaxation, or contained in a broadcast signal (e.g., SIB), and inputs measured values ​​(7-5) of MR SSB and LP-WUR LP-SS of the cells to the threshold values, thereby allowing the terminal to determine whether a condition for performing RRM Measurement Relaxation is satisfied (7-8).

[0182] If the conditions for performing RRM Measurement Relaxation are met, the terminal can perform RRM Measurement Relaxation for the RAT for which the conditions for performing RRM Measurement Relaxation are met (7-9).

[0183] According to one embodiment of the present disclosure, a terminal may be set with at least one condition (some, a combination, or all) among the following conditions from a base station, and may perform RRM Measurement Relaxation for an RAT for which the set conditions are satisfied. More specifically, when the terminal determines that the low mobility of MR (condition 3 [3.] below) is satisfied, the terminal is set to perform MR RRM Measurement Relaxation, and after the terminal receives a threshold for determining each condition or receives an additional signal (e.g., SIB transmitted by a network) (7-3), the terminal may determine whether to perform RRM Measurement Relaxation based on the setting (7-8).

[0184] As illustrated in FIG. 7, in order to determine whether MR-based RRM Measurement Relaxation is performed, satisfaction of the conditions for using a signal for MR-based measurement (1. and / or 3. below) and / or the conditions for using a signal for LR-based measurement (2. and / or 4. below) may be considered. More specifically, in order to determine whether MR-based RRM Measurement Relaxation is performed, the conditions for using a signal for MR-based measurement (1. and / or 3. below) may be used, and if it is determined that the condition for using a signal for MR-based measurement is satisfied, MR-based RRM Measurement Relaxation may be performed. In addition, in order to determine whether MR-based RRM Measurement Relaxation is performed, the conditions for using a signal for LR-based measurement (2. and / or 4. below) may be used, and if it is determined that the condition for using a signal for LR-based measurement is satisfied, MR-based RRM Measurement Relaxation may be performed. In addition, in order to determine whether MR-based RRM Measurement Relaxation is performed, both the condition of using a signal for MR-based measurement (1. and / or 3. below) and the condition of using a signal for LR-based measurement (2. and / or 4. below) can be used, and if it is determined that both the condition of using a signal for MR-based measurement and the condition of using a signal for LR-based measurement are satisfied, MR-based RRM Measurement Relaxation can be performed. In addition, in order to determine whether MR-based RRM Measurement Relaxation is performed, both the condition of using a signal for MR-based measurement (1. and / or 3. below) and the condition of using a signal for LR-based measurement (2. and / or 4. below) can be used.) can all be used, and if it is determined that either the condition of using a signal for MR-based measurement or the condition of using a signal for LR-based measurement is satisfied, MR-based RRM Measurement Relaxation can be performed.

[0185] In addition, as illustrated in FIG. 7, in order to determine whether LR-based RRM Measurement Relaxation is performed, satisfaction of the conditions for using a signal for MR-based measurement (1. and / or 3. below) and / or the conditions for using a signal for LR-based measurement (2. and / or 4. below) may be considered. More specifically, in order to determine whether LR-based RRM Measurement Relaxation is performed, the conditions for using a signal for MR-based measurement (1. and / or 3. below) may be used, and if it is determined that the condition for using a signal for MR-based measurement is satisfied, LR-based RRM Measurement Relaxation may be performed. In addition, in order to determine whether LR-based RRM Measurement Relaxation is performed, the conditions for using a signal for LR-based measurement (2. and / or 4. below) may be used, and if it is determined that the condition for using a signal for LR-based measurement is satisfied, LR-based RRM Measurement Relaxation may be performed. In addition, in order to determine whether or not to perform LR-based RRM Measurement Relaxation, both the condition for using a signal for MR-based measurement (1. and / or 3. below) and the condition for using a signal for LR-based measurement (2. and / or 4. below) can be used, and if it is determined that both the condition for using a signal for MR-based measurement and the condition for using a signal for LR-based measurement are satisfied, LR-based RRM Measurement Relaxation can be performed. In addition, in order to determine whether or not to perform LR-based RRM Measurement Relaxation, both the condition for using a signal for MR-based measurement (1. and / or 3. below) and the condition for using a signal for LR-based measurement (2. and / or 4. below) can be used.) can all be used, and if it is determined that either the condition of using a signal for MR-based measurement or the condition of using a signal for LR-based measurement is satisfied, LR-based RRM Measurement Relaxation can be performed.

[0186] 1. Low mobility of MR (Serving MR measurement indicates the UE has low mobility)

[0187] According to one embodiment of the present disclosure, the terminal periodically measures the MR reference signal of the serving cell and updates any reference value (Srxlev) according to the conditions according to Table 18 below. Ref ) and the current measurement value (Srxlev) transmitted by the base station as a signal (7-3) (MIB, SIB, RRC Reconfiguration, RRC Release, MAC-CE, DCI, etc.) (included in the MR threshold (S SearchDeltaP ) and, if the conditions according to Table 18 below are satisfied, MR RRM Measurement Relaxation can be performed. The terminal operation according to this condition 1. can be set / defined as in Table 18 below.

[0188]

[0189] 2. Low mobility of LR (Serving LR measurement indicates the UE has low mobility)

[0190] According to one embodiment of the present disclosure, the terminal periodically measures the LR reference signal of the serving cell and updates any reference value (Srxlev) according to the conditions according to Table 19 below. Ref) and the current measurement value (Srxlev) transmitted by the base station as the signal (7-3) (MIB, SIB, RRC Reconfiguration, RRC Release, MAC-CE, DCI, etc.) (included in the transmitted) LR threshold (S SearchDeltaP ) and, if it is determined that the conditions according to Table 19 below are satisfied, the terminal can perform LR RRM Measurement Relaxation. The terminal operation according to this condition 2. can be set / defined as in Table 19 below.

[0191]

[0192] 3. Not-at-cell-edge of MR

[0193] According to one embodiment of the present disclosure, the terminal periodically measures the MR reference signal of the serving cell, and updates any current measurement value (Srxlev, Squal) according to the conditions according to Table 20 below, and transmits (includes in the transmission) the MR threshold value (S) transmitted by the base station as a signal (7-3) (MIB, SIB, RRC Reconfiguration, RRC Release, MAC-CE, DCI, etc.). SearchThresholdP , S SearchThresholdQ ) If it is determined that the conditions according to Table 20 below are satisfied, the terminal can perform MR RRM Measurement Relaxation. The terminal operation according to this condition 3. can be set / defined as in Table 20 below.

[0194]

[0195] 4. Not-at-cell-edge of LR

[0196] According to one embodiment of the present disclosure, the terminal periodically measures the LR reference signal of the serving cell, and updates any current measurement value (Srxlev, Squal) according to the conditions according to Table 21 below, and transmits (includes in the transmission) the LR threshold value (S) transmitted by the base station as the signal (7-3) (MIB, SIB, RRC Reconfiguration, RRC Release, MAC-CE, DCI, etc.). SearchThresholdP , S SearchThresholdQ ) If it is determined that the conditions according to Table 21 below are satisfied in comparison with the terminal, the terminal can perform LR RRM Measurement Relaxation. The terminal operation according to this condition 4. can be set / defined as in Table 21 below.

[0197]

[0198] 1. Event A1 of MR (Serving MR becomes better than threshold)

[0199] According to one embodiment of the present disclosure, the terminal compares the threshold value transmitted (included in the signal (7-3) (MIB, SIB, RRC Reconfiguration, RRC Release, MAC-CE, DCI, etc.) by the base station with the measurement value of the serving cell, and if the MR measurement value of the serving cell is determined to be greater than the threshold value, the terminal may perform MR RRM Measurement Relaxation. The terminal operation according to this condition 1. may be set / defined as shown in Table 22 below.

[0200]

[0201] Event A1 can of course be replaced with a condition that compares a threshold and cell measurement values, as shown in Tables 23 and 24 below.

[0202]

[0203]

[0204] Event A1 can of course be replaced with a condition that compares two thresholds and two cell measurements, as shown in Table 25 below.

[0205]

[0206] 2. Event A1 of LR (Serving LR becomes better than threshold)

[0207] According to one embodiment of the present disclosure, the terminal compares the threshold value transmitted (included in the signal (7-3) (MIB, SIB, RRC Reconfiguration, RRC Release, MAC-CE, DCI, etc.) by the base station with the measurement value of the serving cell, and if the LR measurement value of the serving cell is determined to be greater than the threshold value, the terminal may perform LR RRM Measurement Relaxation. The terminal operation according to this condition 2. may be set / defined as shown in Table 22 below.

[0208]

[0209] Of course, event A1 can be replaced with a condition that compares a threshold and cell measurement value, as shown below.

[0210]

[0211]

[0212] Of course, event A1 can be replaced with a condition that compares two thresholds and two cell measurements, as shown below.

[0213]

[0214] FIG. 8 is a diagram illustrating an example of a terminal having an LP-WUR according to an embodiment of the present disclosure, in which a movable LP-WUR Tracking Area, or LP Tracking Area (LP-TA), is set while maintaining a Deep Sleep mode during Idle / Inactive mode operation, and an example of a terminal operation performed accordingly.

[0215] Referring to Fig. 8, the terminal (8-1) can receive a signal including LP Tracking Area configuration information from the serving base station (8-2) in the connected mode (8-4). Thereafter, the terminal can transition to the Idle / Inactive mode by satisfying certain conditions (8-5). If the terminal that transitioned to the Idle / Inactive mode is determined to satisfy the conditions described in Fig. 5, the terminal transitions to the Deep Sleep mode (8-6), thereby operating the MR of the terminal in a power saving mode in whole or in part, thereby reducing power consumption. In addition, the terminal can move while maintaining the Deep Sleep mode. In order to determine the mobility of a terminal that can move while maintaining the Deep Sleep mode, the terminal can receive LP-SS transmitted by neighboring cells as well as the cell in which it is camped (8-8, 8-9), thereby deriving the measurement value of each cell (8-7).

[0216] At this time, if the terminal finds a cell (8-3) with better conditions than the cell currently camped on, the terminal may perform cell reselection by changing the cell to a camped on cell (8-10).

[0217] According to one embodiment of the present disclosure, if the terminal is set in the LP Tracking Area setting signal (8-4) due to cell reselection, movement of the terminal, or performance degradation of the serving cell, and it is determined that the terminal has left the existing LP-TA area that included the existing camped on cell (8-11), the terminal may wake up from the Deep Sleep mode (8-12) and retry connection to a new candidate cell and perform a Tracking Update to notify the network that the LP-TA has changed (8-13).

[0218] When a terminal performs cell reselection to change the cell in which it is camped on (8-10), the terminal may need to find a suitable cell after receiving a SIB, for example, a SIB1 signal, which transmits system information including the above information broadcast by each cell, in order to find a cell that satisfies various conditions such as the service the terminal wants to use and the PLMN to which the terminal belongs.

[0219] However, for terminals that cannot receive the information via MR in the Deep Sleep state, the present disclosure describes a method in which the network provides the terminal with a cell list in advance via LP-TA, from which the terminal can select a cell without receiving SIB information when reselecting a cell.

[0220] By providing a cell list from which the terminal can select a cell without receiving SIB information when reselecting a cell, the terminal can perform cell reselection while maintaining the MR's Deep Sleep mode without waking up the MR to receive SIB when reselecting a cell after moving between cells within a TA. In addition, the terminal can be configured to be aware that the terminal can perform cell reselection while maintaining the MR's Deep Sleep mode.

[0221] In order for the terminal to be able to be configured to know that the terminal can perform cell reselection while maintaining the Deep Sleep mode of the MR, the base station (8-2) may include in the signal for setting LP-TA to the terminal (8-4) some indicator that allows the terminal to recognize that the terminal can be configured to know that the terminal can perform cell reselection while maintaining the Deep Sleep mode of the MR.

[0222] The LP-TA configuration signal (8-4) transmitted by the base station to the terminal may include at least one (part or all) of the following information:

[0223] - List of LP-TA settings expressed as a bundle of information below.

[0224] - Separator ID to distinguish LP-TA

[0225] - List of cell IDs to distinguish cells within LP-TA

[0226] - LP-ID list of each cell that is included in the LP-SS and transmitted by each cell to distinguish cells within the LP-TA.

[0227] - An indicator that indicates that the terminal does not need to receive SIB during cell reselection within LP-TA.

[0228] - An indicator that indicates that the terminal can perform cell reselection while maintaining deep sleep within LP-TA.

[0229] FIG. 9 is a diagram illustrating an embodiment of a method for a terminal having LP-WUR to provide information to a base station before or after transitioning to Deep Sleep mode according to an embodiment of the present disclosure.

[0230] Referring to Fig. 9, a serving cell (9-2) can set a condition for starting a Deep Sleep operation for a terminal (9-1) and provide parameters to be used for the condition (used in configuring the condition) (9-3).

[0231] The conditions under which the terminal (9-1) can initiate the Deep Sleep operation can be configured as different (distinct) conditions depending on the status of the terminal (e.g., Idle / Inactive / Connected status), and can be set to the terminal in the form of a set of different (distinct) conditions and parameters related to (corresponding to) each condition.

[0232] The signal for setting the condition under which the terminal (9-1) can start the Deep Sleep operation and the signal providing the parameter related to the condition (corresponding to the condition) may be one signal or different signals, and may be a Unicast message transmitted to a specific terminal or a Broadcast message (SSB, MIB, SIB, Paging) transmitted to an unspecified number of terminals. The setting information for the condition under which the terminal (9-1) can start the Deep Sleep operation and the parameter related to the condition (corresponding to the condition) may be an RRC message (RRC Reconfig / RRC Release, SIB, MIB), a MAC message including MAC CE, or a DCI message of the PHY layer.

[0233] The signal for setting the condition for the terminal (9-1) to start the Deep Sleep operation and the signal providing the parameter related to the condition (corresponding to the condition) may be two different signals, and each of the two different signals may be a message transmitted through a different layer or a different transmission method. For example, each of the two different signals may be a Unicast message transmitted to a specific terminal, or a Broadcast message (SSB, MIB, SIB, Paging) transmitted to an unspecified number of terminals. The setting information for the parameter related to the condition for the terminal (9-1) to start the Deep Sleep operation (corresponding to the condition) may be an RRC message (RRC Reconfig, SIB, MIB), a MAC message including MAC CE, or a DCI message of the PHY layer.

[0234] According to one embodiment of the present disclosure, a terminal may receive reference signals (e.g., SSB and CSI-RS, etc.) transmitted periodically or from a set resource via MR (NR) from a base station, and input measurement values ​​of the received reference signals into a cell representative value measurement model to derive MR measurement values ​​of the corresponding cell (9-4).

[0235] In addition, similarly, the terminal can receive reference signals (e.g., LP-SS) transmitted periodically from the base station through LP-WUR (LR) or from a set resource, and input the measurement values ​​of the received reference signals into the cell representative value measurement model to derive the LP-WUR (LR) measurement value of the corresponding cell (9-4).

[0236] According to one embodiment of the present disclosure, thereafter, the terminal determines whether any measurement value satisfies a condition set by the network for the terminal to start a Deep Sleep operation (9-5), and if it is determined that the condition is satisfied, the terminal can transition to a Deep Sleep mode (9-7).

[0237] According to one embodiment of the present disclosure, the terminal may be a terminal in Idle / Inactive mode, and in the case of a terminal in Idle / Inactive mode, the terminal may receive an entry condition (9-3) for transitioning to Deep Sleep from a serving cell base station (9-2) as an RRC message, for example, an RRC release message, before transitioning to the Idle / Inactive mode.

[0238] In addition, the terminal in the Idle / Inactive mode can compare the measurement values ​​of each cell measured by MR and LP-WUR with a threshold value included in any signal (e.g., MIB or SIB signal) (9-3) broadcast by the cell on which the terminal is camped to determine whether the entry conditions for transitioning to the Deep Sleep mode are satisfied (9-5).

[0239] According to one embodiment of the present disclosure, when a terminal transitions to Deep Sleep mode, the network does not know this information (e.g., information that the terminal transitions to Deep Sleep mode), and when the network needs to transmit paging to resume connection with the terminal, the network cannot know whether the terminal is operating in Deep Sleep mode or not, and thus, a problem arises in which the network must perform both paging using LP-WUR and paging using MR for the terminal.

[0240] To solve the problem that the network cannot know whether the terminal is operating in Deep Sleep mode or not, and must perform both paging using LP-WUR and paging using MR for the terminal, the terminal can notify the network that the terminal is in a situation where it is transitioning to deep sleep before (9-6) or after (9-8) transitioning to Deep Sleep mode.

[0241] A message sent by a terminal to the network to notify that the terminal is transitioning to deep sleep mode may include at least one (all or part) of the following information:

[0242] - Terminal ID (one or both of MR ID and LR ID)

[0243] - Indicator indicating transition to deep sleep

[0244] - Time information to transition (current time, scheduled time, or timer)

[0245] - Cause value of transition (can be selected from information previously shared in bit map format)

[0246] The deep sleep transition pre-report message (9-6) transmitted by the terminal may be uplink transmission information transmitted by the terminal through MR, may be an RRC message, may be a MAC message including MAC CE, or may be a DCI message of the PHY layer.

[0247] Alternatively, the Deep Sleep transition pre-report message (9-6) transmitted by the terminal may be uplink transmission information transmitted by the terminal through LP-WUR, an RRC message, a MAC message including MAC CE, a DCI message of the PHY layer, or a signal of any other RAT, for example, a message transmitted as an On-off keying signal.

[0248] The report message (9-8) transmitted by the terminal after the deep sleep transition may be uplink transmission information transmitted by the terminal through LP-WUR, an RRC message, a MAC message including MAC CE, a DCI message of the PHY layer, or a signal of any other RAT, for example, a message transmitted as an On-off keying signal.

[0249] In the examples described above, inequalities can be replaced with inequalities that include an equal sign. For example, the '>' inequality can be replaced with an inequality that includes the '>=' inequality.

[0250] FIG. 10 is a diagram illustrating the structure of a base station according to one embodiment of the present disclosure.

[0251] Referring to Figure 10, 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. Additionally, 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.

[0252] 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.

[0253] 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.

[0254] 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.

[0255] FIG. 11 is a diagram illustrating the structure of a terminal according to an embodiment of the present disclosure.

[0256] Referring to Figure 11, 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.

[0257] 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.

[0258] 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.

[0259] 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.

[0260] 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.

[0261] When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. The one or more programs stored in the computer-readable storage medium are configured for execution by one or more processors within an electronic device. The one or more programs include instructions that cause the electronic device to execute methods according to the embodiments described in the claims or specification of the present disclosure.

[0262] 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.

[0263] 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 performing an embodiment of the present disclosure via an external port. Additionally, a separate storage device on the communication network may be connected to a device performing an embodiment of the present disclosure.

[0264] In the specific embodiments of the present disclosure described above, components included in the disclosure are expressed in the singular or plural form, depending on the specific embodiment presented. However, the singular or plural expressions are selected to suit the presented situation for convenience of explanation, and the present disclosure is not limited to singular or plural components. Components expressed in the plural form may be composed of singular elements, or components expressed in the singular form may be composed of plural elements.

[0265] While the detailed description of this disclosure has described specific embodiments, it should be understood that various modifications are possible without departing from the scope of this disclosure. Therefore, the scope of this disclosure should not be limited to the described embodiments, but should be defined not only by the scope of the claims described below, but also by equivalents thereof.

Claims

1. A method performed by a terminal in a wireless communication system, the method comprising: A step of receiving, from a base station, configuration information related to a condition for starting a radio resource management (RRM) measurement relaxation, the configuration including a first condition for starting a main radio (MR) measurement relaxation and a second condition for starting a low power radio (LR) measurement relaxation; and A step of receiving a reference signal related to MR-based measurement and a reference signal related to LR-based measurement from the above base station, respectively, When the above first condition is met, the MR measurement relaxation begins, A method wherein the first condition includes a condition in which a measurement result based on a reference signal related to the LR-based measurement is used, or a condition in which a measurement result based on a reference signal related to the LR-based measurement is used and a condition in which a measurement result based on a reference signal related to the MR-based measurement is used.

2. In paragraph 1, When the second condition above is met, the LR measurement relaxation begins, A method wherein the second condition includes a condition in which a measurement result based on a reference signal related to the MR-based measurement is used, or a condition in which a measurement result based on a reference signal related to the LR-based measurement is used and a condition in which a measurement result based on a reference signal related to the MR-based measurement is used.

3. In paragraph 2, The conditions for using the measurement result based on the reference signal related to the above LR-based measurement and the conditions for using the measurement result based on the reference signal related to the above MR-based measurement include a mobility condition for determining whether the terminal has low mobility and a location condition within cell coverage for determining whether the terminal is located at a location other than a cell boundary within cell coverage. A method, wherein a first parameter for determining the mobility condition and the location condition within the cell coverage, which are included in the conditions for using the measurement result based on the reference signal related to the LR-based measurement, and a second parameter for determining the mobility condition and the location condition within the cell coverage, which are included in the conditions for using the measurement result based on the reference signal related to the MR-based measurement, are separately configured.

4. In paragraph 2, A method in which the above MR measurement relaxation and the above LR measurement relaxation are applied to a serving cell and an adjacent cell.

5. A method performed by a base station in a wireless communication system, the method comprising: A step of transmitting, to a terminal, configuration information related to a condition for starting a radio resource management (RRM) measurement relaxation, the configuration including a first condition for starting a main radio (MR) measurement relaxation and a second condition for starting a low power radion (LR) measurement relaxation; and Including a step of transmitting a reference signal related to MR-based measurement and a reference signal related to LR-based measurement to the above terminal, respectively, When the above first condition is met, the MR measurement relaxation begins, A method wherein the first condition includes a condition in which a measurement result based on a reference signal related to the LR-based measurement is used, or a condition in which a measurement result based on a reference signal related to the LR-based measurement is used and a condition in which a measurement result based on a reference signal related to the MR-based measurement is used.

6. In paragraph 5, When the second condition above is met, the LR measurement relaxation begins, A method wherein the second condition includes a condition in which a measurement result based on a reference signal related to the MR-based measurement is used, or a condition in which a measurement result based on a reference signal related to the LR-based measurement is used and a condition in which a measurement result based on a reference signal related to the MR-based measurement is used.

7. In paragraph 6, The conditions for using the measurement result based on the reference signal related to the above LR-based measurement and the conditions for using the measurement result based on the reference signal related to the above MR-based measurement include a mobility condition for determining whether the terminal has low mobility and a location condition within cell coverage for determining whether the terminal is located at a location other than a cell boundary within cell coverage. A method, wherein a first parameter for determining the mobility condition and the location condition within the cell coverage, which are included in the conditions for using the measurement result based on the reference signal related to the LR-based measurement, and a second parameter for determining the mobility condition and the location condition within the cell coverage, which are included in the conditions for using the measurement result based on the reference signal related to the MR-based measurement, are separately configured.

8. In paragraph 6, A method in which the above MR measurement relaxation and the above LR measurement relaxation are applied to a serving cell and an adjacent cell.

9. In a wireless communication system, the terminal comprises: transceiver; and Including a controller connected to the above transceiver, The above controller, Receive from a base station configuration information related to conditions for starting radio resource management (RRM) measurement relaxation, wherein the configuration includes a first condition for starting main radio (MR) measurement relaxation and a second condition for starting low power radio (LR) measurement relaxation, configured to receive, from the above base station, a reference signal related to MR-based measurement and a reference signal related to LR-based measurement, respectively; When the above first condition is met, the MR measurement relaxation begins, The terminal, wherein the first condition includes a condition in which a measurement result based on a reference signal related to the LR-based measurement is used, or a condition in which a measurement result based on a reference signal related to the LR-based measurement is used and a condition in which a measurement result based on a reference signal related to the MR-based measurement is used.

10. In paragraph 9, When the second condition above is met, the LR measurement relaxation begins, The terminal, wherein the second condition includes a condition in which a measurement result based on a reference signal related to the MR-based measurement is used, or a condition in which a measurement result based on a reference signal related to the LR-based measurement is used and a condition in which a measurement result based on a reference signal related to the MR-based measurement is used.

11. In Article 10, The conditions for using the measurement result based on the reference signal related to the above LR-based measurement and the conditions for using the measurement result based on the reference signal related to the above MR-based measurement include a mobility condition for determining whether the terminal has low mobility and a location condition within cell coverage for determining whether the terminal is located at a location other than a cell boundary within cell coverage. A terminal, wherein a first parameter for determining the mobility condition and the location condition within the cell coverage, which are included in the conditions for using the measurement result based on the reference signal related to the LR-based measurement, and a second parameter for determining the mobility condition and the location condition within the cell coverage, which are included in the conditions for using the measurement result based on the reference signal related to the MR-based measurement, are separately configured.

12. In paragraph 10, The above MR measurement relaxation and the above LR measurement relaxation are applied to the terminal for the serving cell and the adjacent cells.

13. In a wireless communication system, at a base station, the base station, transceiver; and Including a controller connected to the above transceiver, The above controller, A step of transmitting, to a terminal, configuration information related to a condition for starting a radio resource management (RRM) measurement relaxation, the configuration including a first condition for starting a main radio (MR) measurement relaxation and a second condition for starting a low power radion (LR) measurement relaxation; and Including a step of transmitting a reference signal related to MR-based measurement and a reference signal related to LR-based measurement to the above terminal, respectively, When the above first condition is met, the MR measurement relaxation begins, A base station, wherein the first condition includes a condition in which a measurement result based on a reference signal related to the LR-based measurement is used, or a condition in which a measurement result based on a reference signal related to the LR-based measurement is used and a condition in which a measurement result based on a reference signal related to the MR-based measurement is used.

14. In paragraph 13, When the second condition above is met, the LR measurement relaxation begins, A base station, wherein the second condition includes a condition in which a measurement result based on a reference signal related to the MR-based measurement is used, or a condition in which a measurement result based on a reference signal related to the LR-based measurement is used and a condition in which a measurement result based on a reference signal related to the MR-based measurement is used.

15. In paragraph 14, The conditions for using the measurement result based on the reference signal related to the above LR-based measurement and the conditions for using the measurement result based on the reference signal related to the above MR-based measurement include a mobility condition for determining whether the terminal has low mobility and a location condition within cell coverage for determining whether the terminal is located at a location other than a cell boundary within cell coverage. A base station, wherein a first parameter for determining the mobility condition and the location condition within the cell coverage, which are included in the conditions for using the measurement result based on the reference signal related to the LR-based measurement, and a second parameter for determining the mobility condition and the location condition within the cell coverage, which are included in the conditions for using the measurement result based on the reference signal related to the MR-based measurement, are separately configured.

Images