Activation and deactivation method and device using low-power wake up wireless in next generation energy-saving mobile communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates. The disclosure presents an activation and deactivation method and device using low-power wake up wireless in a next generation energy-saving mobile communication system.

Description

Method and device for activating and deactivating a low-power wake-up radio in a next-generation energy-saving 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] The present disclosure provides a signal transmission method and device that support wake-up radio activation and deactivation 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.

[0009] The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0010] In order to solve the above problem, a method performed by a terminal of a wireless communication system according to an embodiment of the present invention may include the steps of: receiving configuration information related to reception of a LP-WUS (low power wake up signal) of the terminal from a base station; switching an MR (main radio) of the terminal to a sleep mode based on the configuration information and monitoring the LP-WUS using the LP-WUR (low power wake up radio) of the terminal; and, when the LP-WUS is received, monitoring a PDCCH (physical downlink control channel) based on the LP-WUS.

[0011] According to an embodiment, the step of monitoring the PDCCH may include a step of waking up the MR when the LP-WUS is received; and a step of monitoring the PDCCH using the MR based on the LP-WUS.

[0012] According to an embodiment, the method may further include a step of transmitting terminal capability information to the base station, the terminal including information associated with supporting reception of the LP-WUS.

[0013] According to an embodiment, the method may further include the steps of: receiving information from the base station instructing to deactivate the LP-WUS before the LP-WUS is received; deactivating the LP-WUR; and waking up the MR.

[0014] In addition, a method performed by a base station of a wireless communication system according to an embodiment of the present invention for solving the above-described problem may include the steps of: transmitting configuration information related to reception of a LP-WUS (low power wake up signal) of a terminal to the terminal; transmitting an LP-WUS to be monitored using a LP-WUR (low power wake up radio) of the terminal based on the configuration information; and transmitting a PDCCH (physical downlink control channel) to the terminal based on the LP-WUS.

[0015] According to an embodiment, the PDCCH may be received by the terminal using the MR (main radio) of the terminal.

[0016] According to an embodiment, the method may further include receiving terminal capability information from the terminal, the terminal capability information including information associated with the terminal supporting reception of the LP-WUS.

[0017] According to an embodiment, the method may further include a step of transmitting, to the terminal, information instructing to deactivate the LP-WUS before transmitting the LP-WUS to the terminal.

[0018] In addition, in order to solve the above-described problem, a terminal of a wireless communication system according to an embodiment of the present invention may include a transceiver; and a control unit connected to the transceiver, configured to receive configuration information related to reception of a LP-WUS (low power wake up signal) of the terminal from a base station, and based on the configuration information, switch an MR (main radio) of the terminal to a sleep mode, monitor the LP-WUS using the LP-WUR (low power wake up radio) of the terminal, and, when the LP-WUS is received, monitor a PDCCH (physical downlink control channel) based on the LP-WUS.

[0019] In addition, in order to solve the above-described problem, a base station of a wireless communication system according to an embodiment of the present invention may include a transceiver; and a control unit connected to the transceiver, configured to transmit configuration information related to reception of a LP-WUS (low power wake up signal) of a terminal to the terminal, and to transmit an LP-WUS to be monitored using an LP-WUR (low power wake up radio) of the terminal based on the configuration information, and to transmit a PDCCH (physical downlink control channel) to the terminal based on the LP-WUS.

[0020] According to one embodiment of the present disclosure, a terminal may include operations of receiving reference signals via wake up radio (WUR) and new radio (NR) from adjacent cells and base stations according to certain conditions, receiving signals including certain activation and deactivation indicators from the base station, and activating and deactivating WUR and NR according to the signals.

[0021] According to one embodiment of the present disclosure, when one or more radio access technologies (RATs) are used in a wireless communication system, power consumption of a terminal can be further reduced by operating one RAT in a low power mode.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] FIG. 3 is a diagram illustrating an example of a terminal's LP-WUS capability reporting procedure according to an embodiment of the present disclosure.

[0026] 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.

[0027] FIG. 5 is a diagram illustrating an embodiment in which a terminal according to an embodiment of the present disclosure receives an LP-WUS activation signal from a base station and performs a related operation when operating in Connected mode.

[0028] FIG. 6 is a diagram illustrating an embodiment in which a terminal according to an embodiment of the present disclosure receives an LP-WUS activation signal from a base station and performs a related operation when operating in Connected mode.

[0029] FIG. 7 is a diagram illustrating an embodiment of a base station according to an embodiment of the present disclosure that allows and enables a terminal to use Idle mode LP-WUS.

[0030] FIG. 8 is a diagram illustrating an embodiment in which a base station, according to an embodiment of the present disclosure, disables the use of LP-WUS by a terminal and the terminal performs an operation accordingly.

[0031] FIG. 9 is a diagram illustrating an embodiment of a base station according to an embodiment of the present disclosure that allows and enables a terminal to use Idle mode LP-WUS.

[0032] FIG. 10 is a diagram illustrating the structure of a base station according to one embodiment of the present disclosure.

[0033] FIG. 11 is a diagram illustrating the structure of a terminal according to an embodiment of the present disclosure.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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).

[0038] 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.

[0039] 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).

[0040] 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.

[0041] 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 Unit).

[0042] One CU (1-02) can support one or more DUs (1-03, 1-04), and one 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).

[0043] UE (1-09) can access an external network via gNB (1-01) through cell (1-06, 1-07, 1-08).

[0044] 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.

[0045] 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, main radio) for performing wireless communication with the WUR UE (2-4) and a WUR (or LP-WUR (low power wakeup radio, low power wakeup receiver), which may be referred to as LR (LP-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 (LP-WUR, LR) (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).

[0046] According to one embodiment of the present disclosure, WUR(2-3, 2-6) may be a physically single but logically distinct module, rather than two physically different modules as part of MR(2-2, 2-5).

[0047] The MR (2-2, 2-5) mounted in the base station (2-1) or terminal (2-4) may refer to a transceiver module operating for NR signals / channels apart from low-power wake-up signals / channels (Tx / Rx module operating for NR signals / channels apart from signals / channels related to low-power wake-up), and the LR (2-3, 2-6) additionally mounted in the base station (2-1) or terminal (2-4) may refer to a receiver module operating for receiving / processing signals / channels related to low-power wake-up.

[0048] According to one embodiment of the present disclosure, WUR(2-3, 2-6) may be a part of MR(2-2, 2-5) both physically and logically.

[0049] In the present disclosure, WUR (2-3, 2-6) 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.

[0050] WUR BS (2-1) and WUR UE (2-4) may be (may have) in the following operational configuration states.

[0051] 1. Full On state with both MR and WUR turned on

[0052] 2. MR On state where only MR is on and WUR is off

[0053] 3. Deep Sleep state (or ultra-deep sleep state) where MR is (completely or partially) turned off and only WUR is turned on.

[0054] 4. Full Off state where MR and WUR are both (completely or partially) turned off.

[0055] 5. Light Sleep state where MR is on but some signals such as SSB, SIB, etc. are not transmitted and power is saved.

[0056] The Deep Sleep mode of the terminal described in 3 above can be defined by one of the following definitions.

[0057] - A mode in which the terminal (2-4) turns off all or part of the circuits and operations related to the MR (2-5) so that no wireless communication is possible through the MR (2-5) and cellular wireless communication is possible through the LP-WUR (2-6).

[0058] - A mode in which the terminal (2-4) mostly turns off all or part of the circuits and operations related to the MR (2-5) and does not perform wireless communication through the MR (2-5) but can transmit and receive messages only through the LP-WUR (2-6), but can also wake up briefly and perform reception through the MR (2-5) at certain resources designated by the network. Here, the above-mentioned certain resources may be, for example, resources such as periodic paging occasions for transmitting and receiving paging, etc.

[0059] In the drawings and signals described after this disclosure, the low power signals transmitted and received between the base station and the terminal, for example, the LP-WUS signals, are signals using a wake up radio transceiver between the base station and the terminal, and in other cases, may be signals transmitted and received using a general main radio.

[0060] In one embodiment, if the WUR is part of an MR that uses some of the resources of the MR, the WUR and the MR may be physically the same Radio that uses different resources.

[0061] FIG. 3 is a diagram illustrating an example of a terminal's LP-WUS capability reporting procedure according to an embodiment of the present disclosure.

[0062] Referring to FIG. 3, a terminal (3-1) can receive a signal (3-3) requesting terminal capability information (UE capability enquiry) from a base station (3-2) of a serving cell to which the terminal (3-1) is connected (connected), and in response thereto, can transmit a capability signal (UE capability information) (3-4) including LP-WUS support capability (capability) information (LP-WUS support capability information) possessed by the terminal to the base station.

[0063] According to one embodiment of the present disclosure, a terminal (3-1) can inform a serving cell (base station) (3-2) through a signal (3-4) that the terminal (3-1) has a function to support the use of LP-WUS through LP-WUR, and specifically, can inform that it supports all or part of the following functions.

[0064] - You can check whether the terminal (3-1) is capable of transmitting and receiving LP-WUS signals.

[0065] - You can find out whether the terminal (3-1) has LP-WUR.

[0066] - You can find out whether the terminal (3-1) supports LP-WUS signal transmission and reception based on OOK (On-Off Keying).

[0067] - You can find out whether the terminal (3-1) supports OFDM-based LP-WUS signal transmission and reception.

[0068] - It can be seen that when the terminal (3-1) is in the RRC Connected state, the presence of a PDCCH signal is indicated by replacing DCP (Downlink control information of power saving) during C-DRX operation through LP-WUS.

[0069] - When the terminal (3-1) is in the RRC Connected state, it can be seen that there is a DCP (Downlink control information of power saving) signal after C-DRX operation via LP-WUS.

[0070] - When the terminal (3-1) is in RRC Idle / Inactive state, it can be known that there is a paging signal through LP-WUS.

[0071] - When the terminal (3-1) is in the RRC Idle / Inactive state, it can be seen that there is a paging early indication (PEI) signal through LP-WUS.

[0072] 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.

[0073] Referring to FIG. 4, the base station (4-2) can transmit to the terminal (4-1) a signal allowing or activating the terminal to utilize the function of LP-WUS reception and subsequent operation using the LP-WUR available to the terminal in FIG. 3, or a signal (4-3) not allowing or deactivating the terminal.

[0074] The terminal (4-1) that receives the LP-WUS reception function activation / deactivation signal (4-3) from the base station (4-2) activates / deactivates the LP-WUS reception function according to the instruction in step 4-4. At this time, if a specific condition is included in the signal, for example, a specific time, a state of the terminal (4-1) (e.g., RRC Idle / Inactive / Connected), or a condition observed by comparing a specific signal strength measurement value with a certain threshold value, the terminal (4-1) may activate / deactivate the LP-WUS reception function when the condition is satisfied. The threshold value may be included in the signal (4-3), or may be a value that is preset and included in a signal received by the terminal (4-1) in advance or may be included and manufactured when the terminal (4-1) is manufactured.

[0075] The above 4-3 signal may be an RRC signal using MR transmitted to a specific terminal (4-1) or a specific terminal group, for example, an RRC signal such as RRC Config (RRC configuration), RRC Reconfig (RRC reconfiguration), or RRC Release received by the terminal in RRC Connected mode, or may be any MAC (medium access control) CE (control element) signal, or may be any (PHY (physical)) DCI (downlink control information) signal.

[0076] In addition, the above 4-3 signal is a type of broadcast signal transmitted to any unspecified number of terminals and may be a type of Master Information Block (MIB) or System Information Block (SIB) transmitted and received through MR.

[0077] In addition, the above 4-3 signal may be an RRC signal using LR (WUR) transmitted to a specific terminal or a specific terminal group, for example, an RRC signal such as RRC Config, RRC Reconfig, or RRC Release received by the terminal in RRC Connected mode, or may be any MAC CE signal, or may be any PHY DCI signal.

[0078] In addition, the above 4-3 signal is a type of broadcast signal transmitted to any unspecified number of terminals and may be a type of MIB or SIB transmitted and received through LR (WUR).

[0079] The LP-WUS availability / unavailability information set by the base station (4-2) to the terminal (4-1) may simply be information about the corresponding serving cell, or may include information about one or more base stations, cells, or a certain area. The information may have all or part of the following configuration.

[0080] - Base station ID

[0081] - Cell ID

[0082] - ID of any area that the terminal can distinguish

[0083] - Tracking area ID

[0084] - Indicator indicating availability / disability

[0085] For example, the base station (4-2) can configure a list by bundling each cell ID and an indicator indicating whether LP-WUS is available or not in the corresponding cell to the terminal (4-1) and set it to the terminal (4-1).

[0086] In another embodiment, the base station (4-2) can configure a list by bundling each base station ID and an indicator indicating whether LP-WUS can be used or not within the base station to the terminal (4-1) and set it to the terminal.

[0087] In another embodiment, the base station (4-2) may provide the terminal (4-1) with a list of cell IDs for which LP-WUS is available, thereby indicating to the terminal (4-1) that LP-WUS is available in the area of ​​the corresponding cells. In this case, the terminal (4-1) may recognize that it cannot use LP-WUS for cells for which LP-WUS is not available.

[0088] In another embodiment, the base station (4-2) may provide the terminal (4-1) with a list of cell IDs for which LP-WUS is unavailable, thereby indicating to the terminal (4-1) that LP-WUS is unavailable in the area of ​​the corresponding cells. In this case, the terminal (4-1) may recognize that LP-WUS is available for cells for which the setting is not made.

[0089] In another embodiment, the base station (4-2) may provide the terminal (4-1) with an indicator informing that LP-WUS is available and a list of corresponding cell IDs, and an indicator informing that LP-WUS is unavailable and a list of corresponding cell IDs, thereby enabling the terminal (4-1) to set whether LP-WUS is available / unavailable in the area of ​​the corresponding cells.

[0090] If the above signal is a deactivation signal, the terminal (4-1) stops operation for LP-WUS reception within the cell or cell area indicated by the deactivation signal.

[0091] The above activation / deactivation signal may include an indicator that directly indicates activation / deactivation.

[0092] Alternatively, if the activation / deactivation signal includes information about settings or instructions related to LP-WUS, for example, information about setting an entry condition for the terminal (4-1) to transition to LP-WUS monitoring or MR sleep mode operation and / or information about setting an exit condition for the terminal (4-1) to stop LP-WUS monitoring or MR sleep mode operation, the existence of the settings itself may be understood as implicitly indicating that the terminal (4-1) has indicated activation that it can use LP-WUS within the cell.

[0093] Alternatively, the signal (4-3) may include not only the indicator indicating the activation / deactivation, but also settings or instructions related to LP-WUS, for example, any entry condition that allows the terminal (4-1) to transition to LP-WUS monitoring or MR sleep mode operation and / or any exit condition that causes the terminal (4-1) to stop LP-WUS monitoring or MR sleep mode operation. In this case, the terminal (4-1) can use the LP-WUS-related settings set later only when the indicator indicating activation / deactivation is in the activation state.

[0094] Alternatively, when there is no setting or instruction related to LP-WUS, as well as an instruction indicating activation / deactivation in the signal (4-3), the terminal (4-1) may be understood to have implicitly indicated that LP-WUS is deactivated in the cell.

[0095] FIG. 5 is a diagram illustrating an embodiment in which a terminal according to an embodiment of the present disclosure receives an LP-WUS activation signal from a base station and performs a related operation when operating in Connected mode.

[0096] Referring to FIG. 5, the base station (5-2) can instruct the terminal (5-1) to enable the terminal to use LP-WUS in Connected mode operation and provide the parameters to be used for the condition (used for configuring the condition) through a downlink RRC (re)configuration signal transmitted from the MR (5-3).

[0097] For example, for LP-WUS reception replacing DCP, the base station (5-2) can set the location of resources so that the terminal (5-1) can monitor LP-WUS.

[0098] According to the Radio Resource Control (RRC) standard 38.331, existing DCP settings may contain information such as the following [Table 1] and [Table 2].

[0099] DCP-Config-r16 ::= SEQUENCE {ps-RNTI-r16 RNTI-Value,ps-Offset-r16 INTEGER (1..120),sizeDCI-2-6-r16 INTEGER (1..maxDCI-2-6-Size-r16),ps-PositionDCI-2-6-r16 INTEGER (0..maxDCI-2-6-Size-1-r16),ps-WakeUp-r16 ENUMERATED {true} OPTIONAL, -- Need Sps-TransmitPeriodicL1-RSRP-r16 ENUMERATED {true} OPTIONAL, -- Need Sps-TransmitOtherPeriodicCSI-r16 ENUMERATED {true} OPTIONAL -- Need S}

[0100] ps-RNTIRNTI value for CRC scrambling of DCI format 2-6 used for power saving (see TS 38.213, section 10.1). ps-OffsetLong Start of discovery time for DCI format 2-6 with CRC scrambled by PS-RNTI for the start of drx-onDurationTimer of DRX (see TS 38.213, section 10.3). Value in multiples of 0.125 ms (milliseconds). 1 corresponds to 0.125 ms, 2 to 0.25 ms, 3 to 0.375 ms, etc. ps-WakeUpActive Indicates the UE to wake up if no DCI format 2-6 is detected outside of the time period (see TS 38.321, section 5.7). If the field is absent, the UE shall not wake up unless DCI format 2-6 is detected outside the Active time.ps-PositionDCI-2-6Starting position of the UE wakeup and Scell ​​dormancy indication in DCI format 2-6 (see TS 38.213, section 10.3)ps-TransmitPeriodicL1-RSRPIndicates that the UE will transmit periodic L1-RSRP report(s) if the drx-onDurationTimer is not started (see TS 38.321, section 5.7). If the field is absent, the UE shall not transmit periodic L1-RSRP report(s) if the drx-onDurationTimer is not started.ps-TransmitOtherPeriodicCSIIndicates that the UE will transmit periodic CSI report(s) other than L1-RSRP report(s) if the drx-onDurationTimer is not started (see TS 38.321, section 5.7). If the field is absent, the terminal does not transmit periodic CSI report(s) other than L1-RSRP reports unless drx-onDurationTimer is started.

[0101] According to one embodiment of the present disclosure, downlink signal 5-3 may include all or part of the settings set to terminal (5-1) such as [Table 3] and [Table 4] below for terminal (5-1) to replace DCP by utilizing LP-WUS.

[0102] LP-WUS-DCP-Config ::= SEQUENCE {ps-RNTI RNTI-Value,ps-Offset INTEGER (1..120),sizeLP-WUS INTEGER (1..maxLP-WUS-Size),ps-PositionLP-WUS INTEGER (0..maxLP-WUS-Size-1),ps-WakeUp ENUMERATED {true} OPTIONAL, -- Need Sps-TransmitPeriodicL1-RSRP ENUMERATED {true} OPTIONAL, -- Need Sps-TransmitOtherPeriodicCSI ENUMERATED {true} OPTIONAL -- Need S}

[0103] ps-RNTIRNTI value for CRC scrambling of LP-WUS used for power savingps-OffsetLong Start of discovery time of LP-WUS with CRC scrambled by PS-RNTI for start of drx-onDurationTimer of DRXps-WakeUpActive Indicates the UE to wake up if no LP-WUS is detected outside of the active time. If the field is absent, the UE shall not wake up if no LP-WUS is detected outside of the active time.ps-PositionLP-WUSStart position of UE wakeup and dormancy indication for LP-WUSps-TransmitPeriodicL1-RSRPIndicates the UE to transmit periodic L1-RSRP report(s) if drx-onDurationTimer is not started (see TS 38.321, clause 5.7). If the field is absent, the UE does not transmit periodic L1-RSRP report(s) unless drx-onDurationTimer is started.ps-TransmitOtherPeriodicCSI Indicates that the UE transmits periodic CSI report(s) other than L1-RSRP report(s) unless drx-onDurationTimer is started (see TS 38.321, section 5.7). If the field is absent, the UE does not transmit periodic CSI report(s) other than L1-RSRP report unless drx-onDurationTimer is started.sizeLP-WUS Indicates the number of LP-WUS operating in the cell and has a value between 0 and maxLP-WUS-Size.

[0104] In addition to the above information, LP-WUS using LP-WUR may have settings including the following information:

[0105] - LP-WUR activation directive

[0106] - LP-WUR activation cell ID (list)

[0107] - LP-WUR type (indicating OOK, OFDM, etc.)

[0108] - Information such as ID or sequence number that can identify the LP-WUS sequence to be transmitted to the terminal

[0109] - LP-WUS frequency information (ARFCN, frequency channel id, ...)

[0110] - Terminal ID, terminal group ID, or terminal subgroup ID

[0111] The terminal (5-1) that has received the above LP-WUR activation and configuration information signal (5-3) can start the operation if the conditions of the connected mode discontinuous reception (C-DRX) operation are satisfied (5-4). Thereafter, in order to know whether the terminal (5-1) needs to check the downlink PDCCH channel resources to be received at specific on-durations according to the C-DRX rule, the terminal (5-1) can monitor the LP-WUS resources set in the signal 5-3 using LP-WUR (5-5).

[0112] Afterwards, through the monitoring, if the terminal (5-1) receives an LP-WUS having an LP-WUS ID that the terminal (5-1) should receive, or an ID that is mapped to the terminal ID, terminal group ID, or terminal subgroup ID, the terminal (5-1) recognizes that the LP-WUS is transmitted for the terminal (5-1), and can monitor and receive the PDCCH transmitted by the base station (5-2) in the on-duration that exists immediately thereafter (or after a certain period of time depending on the setting) (5-6).

[0113] FIG. 6 is a diagram illustrating an embodiment in which a terminal according to an embodiment of the present disclosure receives an LP-WUS activation signal from a base station and performs a related operation when operating in Connected mode.

[0114] Referring to FIG. 6, the base station (6-2) can instruct the terminal (6-1) to enable LP-WUS in the Connected mode operation and provide parameters to be used for the conditions (used in configuring the conditions) (6-3). For example, for LP-WUS reception replacing DCP, the base station (6-2) can set the location of resources so that the terminal (6-1) can monitor LP-WUS.

[0115] According to one embodiment of the present disclosure, the downlink signal 6-3 may be the same signal as the downlink signal 5-3 illustrated in FIG. 5.

[0116] The terminal (6-1) that has received the above LP-WUR activation and setup information signal (6-3) can start the operation when the condition of connected mode discontinuous reception (C-DRX) is satisfied (6-4).

[0117] In addition, the terminal (6-1) may save power by operating the Main Radio (MR) in sleep mode when certain conditions are met. For example, when the off duration length within the C-DRX is longer than the transition time required for the terminal (6-1) to sufficiently turn the MR off and on, the terminal (6-1) may selectively turn off the power of the MR and operate in deep sleep mode.

[0118] Thereafter, the terminal (6-1) can monitor the LP-WUS resource set in the signal 6-3 (6-5) to determine whether it is necessary to examine the downlink PDCCH channel resources to be received for each specific on-duration according to the C-DRX rule.

[0119] Afterwards, through the monitoring, if the terminal (6-1) receives an LP-WUS having an LP-WUS ID that the terminal (6-1) should receive, or an ID that is mapped to the terminal ID, terminal group ID, or terminal subgroup ID, the terminal (6-1) recognizes that the LP-WUS has been transmitted for the terminal (6-1) and can wake up the MR of the terminal (6-1) if it is sleeping to receive the PDCCH transmitted by the base station (6-2) in the on-duration that exists immediately after (or after a certain period of time depending on the setting) (6-6).

[0120] Afterwards, the terminal (6-1) can monitor and receive the PDCCH through MR for a set on duration (6-7).

[0121] FIG. 7 is a diagram illustrating an embodiment of a base station according to an embodiment of the present disclosure that allows and enables a terminal to use Idle mode LP-WUS.

[0122] Referring to FIG. 7, the base station (7-2) may transmit an RRC signal, for example, an RRC Reconfig message or an RRC Release message, to the terminal (7-1) to instruct the terminal (7-1) to enable / disable LP-WUS in Idle / Inactive mode operation and to provide parameters to be used for conditions (used for configuring conditions) (7-3).

[0123] The LP-WUS availability / unavailability information set by the base station (7-2) to the terminal (7-1) may simply be information about the corresponding serving cell, or may include information about one or more base stations, cells, or a certain area. The information may have all or part of the following configuration.

[0124] - Base station ID (list)

[0125] - Cell ID (list)

[0126] - ID (list) of any area that the terminal can distinguish

[0127] - Tracking area ID (list)

[0128] - Directives (list) indicating availability / disability

[0129] For example, the base station (7-2) can configure a list by pairing each cell ID and an indicator indicating availability / disability of LP-WUS in the corresponding cell to the terminal (7-1) and set it to the terminal (7-1).

[0130] In another embodiment, the base station (7-2) can configure a list in the form of pairs of each base station ID and an indicator indicating availability / disability of LP-WUS within the corresponding base station and set it to the terminal (7-1).

[0131] In another embodiment, the base station (7-2) may provide the terminal (7-1) with a list of cell IDs for which LP-WUS is available, thereby indicating to the terminal (7-1) that LP-WUS is available in the area of ​​the corresponding cells. In this case, the terminal (7-1) may recognize that it cannot use LP-WUS for cells for which LP-WUS is not available.

[0132] In another embodiment, the base station (7-2) may provide the terminal (7-1) with a list of cell IDs for which LP-WUS is unavailable, thereby indicating to the terminal (7-1) that LP-WUS is unavailable in the area of ​​the corresponding cells. In this case, the terminal (7-1) may recognize that LP-WUS is available for cells for which the setting is not made.

[0133] In another embodiment, the base station (7-2) may provide the terminal (7-1) with an indicator informing that LP-WUS is available and a list of corresponding cell IDs, and an indicator informing that LP-WUS is unavailable and a list of corresponding cell IDs, thereby enabling the terminal (7-1) to set whether LP-WUS is available / unavailable in the area of ​​the corresponding cells.

[0134] In the above embodiments, the cell ID may be replaced with a base station ID, an area ID, a tracking area ID, etc.

[0135] In order to receive LP-WUS in idle / inactive mode (state) of a terminal (7-1) camping under the same base station, the base station (7-2) can set the location of the resource through the signal 7-3 so that the terminal (7-1) can monitor LP-WUS.

[0136] The above signal (7-3) may also include all or part of the LP-WUS resource information that the base station (7-2) sets to the terminal (7-1).

[0137] - Any resource information such as time / frequency at which WUS can be transmitted,

[0138] ■ Resource information including subframe / radioframe / slot time information (or TTI (transmission time interval)) that has some rule that repeats periodically, for example.

[0139] ■ For example, subgroup ID that can receive LP-WUS

[0140] ■ For example, resource information including WUS transmission time duration, absolute time, number of slots, number of frames, etc.

[0141] ■ Resource information including absolute time, number of slots, number of frames, timer, etc., to indicate a start time that can be transmitted after a certain period of time after receiving the signal.

[0142] ■ Resource information including the ID of the frequency band, which refers to a certain frequency band, for example.

[0143] ■ Resource information including, for example, the ID of the resource block indicating a starting frequency, the bandwidth indicating the frequency bandwidth, the number of unit resource block frequency bandwidths, etc.

[0144] ■ Resource information including, for example, the ID of the reference frequency to indicate the starting frequency from a certain reference frequency, the bandwidth indicating the difference between the reference frequency and the starting frequency, the number of unit resource block frequency bandwidths, etc.

[0145] - A sequence ID or list of sequence IDs that can specify sequences that can be transmitted to WUS.

[0146] - An ID of information or a list of information IDs that designates the type of information that can be transmitted to WUS.

[0147] - A list of condition IDs or condition IDs that indicate the type of condition that can transmit WUS.

[0148] - An indication that the terminal can transmit WUS when the base station is operating in Deep Sleep mode.

[0149] - The above information may be information about the base station transmitting the signal.

[0150] - The above information may be information on a base station (or cell) adjacent to the base station transmitting the signal, and in this case, it may include a base station ID or cell ID or a base station ID list or a cell ID list.

[0151] - The above information may be applied to one or more base stations or cells, and may include a list of base station IDs or cell IDs that can use the corresponding WUS transmission information.

[0152] - The above information may be applied equally 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.

[0153] - The above information may have a structure and format similar to or identical to PRACH (Physical Random Access Channel) configuration information.

[0154] Afterwards, the terminal (7-1) can transition to idle / inactive mode (state) depending on the operation when a specific condition is satisfied, for example, when a radio link failure event occurs, or when there is no reception signal for a long period of time set by the network (7-4).

[0155] The idle / inactive mode terminal (7-1) can receive LP-WUS transmission information from the base station (7-2) for activated LP-WUS reception (7-5). At this time, the information may be included in a broadcast signal transmitted by the base station (7-2) to the terminal (7-1) as MR or LR (WUR), for example, a master information block (MIB) included in SSB, or any system information block (SIB). Alternatively, the information may be included in a unicast signal transmitted by the base station (7-2) to the terminal (7-1) specifically as MR or LR (WUR), for example, an RRC signal, a MAC signal, or a PHY signal.

[0156] The information may include resource information and subgrouping information of LP-WUS required for the terminal (7-1) to receive LP-WUS.

[0157] In one embodiment, the terminal (7-1) can receive the setting information of the LP-WUS from a signal (7-3) received before terminating the connection rather than from a broadcast signal (7-5), and can receive the LP-WUS by utilizing the setting information.

[0158] Through the above signal (7-5), the base station (7-2) of the corresponding cell can transmit a signal containing all or part of the following WUS resource information to the terminal (7-1).

[0159] - Any resource information such as time / frequency at which WUS can be transmitted,

[0160] ■ Resource information including subframe / radioframe / slot time / TTI information that has some rule that repeats periodically, for example.

[0161] ■ For example, subgroup ID that can receive LP-WUS

[0162] ■ For example, resource information including WUS transmission time duration, absolute time, number of slots, number of frames, etc.

[0163] ■ Resource information including absolute time, number of slots, number of frames, timer, etc., to indicate a start time that can be transmitted after a certain period of time after receiving the signal.

[0164] ■ Resource information including the ID of the frequency band, which refers to a certain frequency band, for example.

[0165] ■ Resource information including, for example, the ID of the resource block indicating a starting frequency, the bandwidth indicating the frequency bandwidth, the number of unit resource block frequency bandwidths, etc.

[0166] ■ Resource information including, for example, the ID of the reference frequency to indicate the starting frequency from a certain reference frequency, the bandwidth indicating the difference between the reference frequency and the starting frequency, the number of unit resource block frequency bandwidths, etc.

[0167] - A sequence ID or list of sequence IDs that can specify sequences that can be transmitted to WUS.

[0168] - An ID of information or a list of information IDs that designates the type of information that can be transmitted to WUS.

[0169] - A list of condition IDs or condition IDs that indicate the type of condition that can transmit WUS.

[0170] - An indication that the terminal can transmit WUS when the base station is operating in Deep Sleep mode.

[0171] - The above information may be information about the base station transmitting the signal.

[0172] - The above information may be information on a base station (or cell) adjacent to the base station transmitting the signal, and in this case, it may include a base station ID or cell ID or a base station ID list or a cell ID list.

[0173] - The above information may be applied to one or more base stations or cells, and may include a list of base station IDs or cell IDs that can use the corresponding WUS transmission information.

[0174] - The above information may be applied equally 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.

[0175] - The above information may have a structure and format similar to or identical to PRACH (Physical Random Access Channel) configuration information.

[0176] The above setting signal (7-5) or (7-3) may include a condition for the terminal (7-1) to start MR sleep mode or start monitoring LP WUS transmission via LP-WUR, so-called entry condition. For example, the terminal (7-1) may determine that the entry condition is satisfied when the MR cell it is camping on uses LP-WUS and the MR measurement value of the cell is higher than a threshold value set in the signal (7-5) or (7-3). Such terminal (7-1) may start MR sleep mode or start monitoring LP WUS transmission via LP-WUR (7-6).

[0177] Additionally, the base station (7-2) may transmit to the terminal (7-1) the configuration signal (7-5) or (7-3) including an indicator that allows the terminal (7-1) to distinguish whether the LP-WUS to be received is for Paging or Paging Early Indication (PEI). For example, the base station (7-2) may transmit to the terminal (7-1) the configuration signal (7-5) or (7-3) explicitly including that an ID or a list of IDs of a specific LP-WUS indicates that there is any Paging or Paging Early Indication to be transmitted to the terminal (7-1).

[0178] The above activation / deactivation signal may include an indicator that directly indicates activation / deactivation.

[0179] Alternatively, if the activation / deactivation signal includes information about settings or instructions related to LP-WUS, for example, information about setting an entry condition that allows the terminal (7-1) to transition to LP-WUS monitoring or MR sleep mode operation and / or information about setting an exit condition that allows the terminal (7-1) to stop LP-WUS monitoring or MR sleep mode operation, the existence of the settings itself may be understood as implicitly indicating that the terminal (7-1) has indicated activation that allows the terminal to use LP-WUS within the cell.

[0180] Alternatively, the signal may include all of the settings or instructions related to LP-WUS, for example, any entry condition that allows the terminal (7-1) to transition to LP-WUS monitoring or MR sleep mode operation and / or any exit condition that causes the terminal (7-1) to stop LP-WUS monitoring or MR sleep mode operation, in addition to the instruction indicating the activation / deactivation. In this case, the terminal (7-1) can use the LP-WUS-related settings set later only when the instruction indicating activation / deactivation is in the activation state.

[0181] Alternatively, when there is no indication of activation / deactivation in the signal, as well as no settings or instructions related to LP-WUS, the terminal (7-1) may be understood to have implicitly indicated that LP-WUS is deactivated in the cell.

[0182] Afterwards, the terminal (7-1) can receive the LP-WUS through the LP-WUR that was being monitored (7-7). The LP-WUS may indicate that there is a paging or paging early indication that the terminal (7-1) will receive later. The terminal (7-1) can determine whether the LP-WUS is the LP-WUS that the terminal (7-1) should receive by comparing the ID of the LP-WUS, the subgroup ID of the LP-WUS, the terminal ID, and the LP-WUS information (7-3, 7-5) that was set in advance.

[0183] If the ID information compared in this way matches, the terminal (7-1) wakes up the MR if it is operating in sleep mode (7-8), and the terminal (7-1) can then attempt to receive (monitor) paging or PEI through the MR from receivable resources (7-9).

[0184] In the case of a terminal (7-1) that receives a PEI in the above procedure, if the PEI is the PEI that the terminal (7-1) should receive, for example, if the subgroup ID of the PEI matches that of the terminal (7-1), the terminal (7-1) can attempt to receive paging at a later paging occasion.

[0185] A terminal (7-1) operating in Idle / Inactive mode may need to receive LP-WUS activation / deactivation information and configuration information of a corresponding cell whenever the cell it is camping on changes depending on the mobility of the terminal (7-1). At this time, the terminal (7-1) that has received and identified LP-WUS activation / deactivation information of an adjacent cell from a serving cell in advance can recognize whether or not to use the LP-WUR radio during inter-cell movement for the candidate cell, and accordingly, can select whether or not to use LP-WUS of the terminal (7-1) immediately before transitioning to a camping cell. From the perspective of the terminal (7-1), the LP-WUS entry / exit point in time can be set as the camping cell transition point to a specific cell.

[0186] FIG. 8 is a diagram illustrating an embodiment in which a base station, according to an embodiment of the present disclosure, disables the use of LP-WUS by a terminal and the terminal performs an operation accordingly.

[0187] Referring to FIG. 8, the terminal (8-1) is currently activating LP-WUR and performing LP-WUS monitoring, and is operating the MR in sleep mode to save power (8-3). At this time, the terminal (8-1) may be in RRC Connected mode or RRC Idle / Inactive mode.

[0188] Afterwards, the base station (8-2) can instruct the terminal (8-1) to deactivate LP-WUS within the base station (8-2) or cell (8-4). The signal may be an RRC signal using MR transmitted to a specific terminal or a specific terminal group, for example, an RRC signal such as RRC Config, RRC Reconfig, or RRC Release received by the terminal (8-1) in RRC Connected mode, or may be any MAC CE signal, or may be any PHY DCI signal.

[0189] In addition, the above signal may be a type of MIB or SIB transmitted and received via MR as a type of broadcast signal transmitted to any unspecified number of terminals, for example, idle / inactive terminals.

[0190] The terminal (8-1) that receives the LP-WUS deactivation signal (8-4) from the base station (8-2) can deactivate the LP-WUS that was being monitored and the LP-WUR (LP-WUS) that was being activated (8-5). In addition, if the terminal (8-1) was operating in sleep mode, the terminal (8-1) can wake up the MR and start transmitting and receiving signals to and from the MR (8-6).

[0191] FIG. 9 is a diagram illustrating an embodiment of a base station according to an embodiment of the present disclosure that allows and enables a terminal to use Idle mode LP-WUS.

[0192] Referring to FIG. 9, the base station (9-2) can transmit a broadcast signal, for example, a MIB message or a SIB message, to the terminal (9-1) to instruct the terminal (9-1) to enable / disable LP-WUS in Idle / Inactive mode operation and to provide parameters to be used for conditions (used in configuring conditions) (9-3).

[0193] The LP-WUS availability / unavailability information set by the base station (9-2) to the terminal (9-1) may simply be information about the corresponding serving cell, or may include information about one or more base stations, cells, or a certain area. It may have all or part of the following configuration.

[0194] - Base station ID

[0195] - Cell ID

[0196] - ID of any area that the terminal can distinguish

[0197] - Tracking area ID

[0198] - Indicator indicating availability / disability

[0199] For example, the base station (9-2) can configure a list by bundling each cell ID and an indicator indicating whether LP-WUS is available or not in the corresponding cell to the terminal (9-1) and set it to the terminal.

[0200] In another embodiment, the base station (9-2) can configure a list by bundling each base station ID and an indicator indicating whether LP-WUS is available or not within the base station, and set it to the terminal (9-1).

[0201] In another embodiment, the base station (9-2) may provide the terminal (9-1) with a list of cell IDs for which LP-WUS is available, thereby indicating to the terminal (9-1) that LP-WUS is available in the area of ​​the corresponding cells. In this case, the terminal (9-1) may recognize that it cannot use LP-WUS for cells for which LP-WUS is not available.

[0202] In another embodiment, the base station (9-2) may provide the terminal (9-1) with a list of cell IDs for which LP-WUS is unavailable, thereby indicating to the terminal (9-1) that LP-WUS is unavailable in the area of ​​the corresponding cells. In this case, the terminal (9-1) may recognize that LP-WUS is available for cells for which the setting is not made.

[0203] In another embodiment, the base station (9-2) may provide the terminal (9-1) with an indicator informing that LP-WUS is available and a list of corresponding cell IDs, and an indicator informing that LP-WUS is unavailable and a list of corresponding cell IDs, thereby enabling the terminal (9-1) to set whether LP-WUS is available / unavailable in the area of ​​the corresponding cells.

[0204] Additionally, the base station (9-2) can transmit to the terminal (9-1) resources and related information for transmitting the LP-WUS, which enables the terminal to receive the LP-WUS. The information can be transmitted via any broadcast signal, for example, a MIB message or a SIB message (9-4).

[0205] Through the above signal (9-4), the base station (9-2) of the corresponding cell can transmit a signal containing all or part of the following WUS resource information to the terminal (9-1).

[0206] - Any resource information such as time / frequency at which WUS can be transmitted,

[0207] ■ Resource information including subframe / radioframe / slot time / TTI information that has some rule that repeats periodically, for example.

[0208] ■ For example, subgroup ID that can receive LP-WUS

[0209] ■ For example, resource information including WUS transmission time duration, absolute time, number of slots, number of frames, etc.

[0210] ■ Resource information including absolute time, number of slots, number of frames, timer, etc., to indicate a start time that can be transmitted after a certain period of time after receiving the signal.

[0211] ■ Resource information including the ID of the frequency band, which refers to a certain frequency band, for example.

[0212] ■ Resource information including, for example, the ID of the resource block indicating a starting frequency, the bandwidth indicating the frequency bandwidth, the number of unit resource block frequency bandwidths, etc.

[0213] ■ Resource information including, for example, the ID of the reference frequency to indicate the starting frequency from a certain reference frequency, the bandwidth indicating the difference between the reference frequency and the starting frequency, the number of unit resource block frequency bandwidths, etc.

[0214] - A sequence ID or list of sequence IDs that can specify sequences that can be transmitted to WUS.

[0215] - An ID of information or a list of information IDs that designates the type of information that can be transmitted to WUS.

[0216] - A list of condition IDs or condition IDs that indicate the type of condition that can transmit WUS.

[0217] - An indication that the terminal can transmit WUS when the base station is operating in Deep Sleep mode.

[0218] - The above information may be information about the base station transmitting the signal.

[0219] - The above information may be information on a base station (or cell) adjacent to the base station transmitting the signal, and in this case, it may include a base station ID or cell ID or a base station ID list or a cell ID list.

[0220] - The above information may be applied to one or more base stations or cells, and may include a list of base station IDs or cell IDs that can use the corresponding WUS transmission information.

[0221] - The above information may be applied equally 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.

[0222] - The above information may have a structure and format similar to or identical to PRACH (Physical Random Access Channel) configuration information.

[0223] The above signals 9-3 and 9-4 may be information contained within one and the same signal.

[0224] In one embodiment, the terminal (9-1) can receive the setting information of the LP-WUS from a signal (9-3) received before terminating the connection rather than from a broadcast signal (9-4), and can receive the LP-WUS by utilizing the setting information.

[0225] The above setting signal (9-4) or (9-3) may include a condition for the terminal (9-1) to start MR sleep mode or start monitoring LP WUS transmission via LP-WUR, so-called entry condition. For example, the terminal (9-1) may determine that the entry condition is satisfied when the MR cell it is camping on uses LP-WUS and the MR measurement value of the cell is higher than a threshold value set in the signal (9-4) or (9-3). Such terminal (9-1) may start MR sleep mode or start monitoring LP WUS transmission via LP-WUR (9-5).

[0226] Additionally, the base station (9-2) may transmit to the terminal (9-1) the configuration signal (9-4) or (9-3) including an indicator that enables the terminal (9-1) to distinguish whether the LP-WUS to be received is for Paging or Paging Early Indication. For example, the base station (9-2) may transmit to the terminal (9-1) the configuration signal (9-4) or (9-3) explicitly including that an ID or a list of IDs of a specific LP-WUS indicates that there is any Paging or Paging Early Indication to be transmitted to the terminal (9-1).

[0227] The above activation / deactivation signal may include an indicator that directly indicates activation / deactivation.

[0228] Alternatively, if the activation / deactivation signal includes information about settings or instructions related to LP-WUS, for example, information about setting any entry condition that allows the terminal (9-1) to transition to LP-WUS monitoring or MR sleep mode operation and / or any exit condition that allows the terminal (9-1) to stop LP-WUS monitoring or MR sleep mode operation, the presence of those settings may be understood as implicitly indicating that the terminal (9-1) has indicated activation that allows LP-WUS to be used within the cell.

[0229] Alternatively, the signal may include all of the settings or instructions related to LP-WUS, for example, any entry condition that allows the terminal (9-1) to transition to LP-WUS monitoring or MR sleep mode operation and / or any exit condition that causes the terminal (9-1) to stop LP-WUS monitoring or MR sleep mode operation, in addition to the instruction indicating the activation / deactivation. In this case, the terminal (9-1) can use the LP-WUS-related settings set later only when the instruction indicating activation / deactivation is in the activation state.

[0230] Alternatively, when there is no indication of activation / deactivation in the signal, as well as no settings or instructions related to LP-WUS, the terminal (9-1) may be understood to have implicitly indicated that LP-WUS is deactivated in the cell.

[0231] Afterwards, the terminal (9-1) can receive the LP-WUS through the LP-WUR that was being monitored (9-6). The LP-WUS may indicate that there is a paging or paging early indication that the terminal (9-1) received later. The terminal (9-1) can determine whether the LP-WUS is the LP-WUS that the terminal (9-1) should receive by comparing the ID of the LP-WUS, the subgroup ID of the LP-WUS, the terminal ID, and the LP-WUS information (9-4) that was set in advance.

[0232] If the ID information compared in this way matches, the terminal (9-1) can wake up the MR if it is operating in sleep mode (9-7) and then attempt to receive paging or PEI through the MR from a receivable resource (9-8).

[0233] In the case of a terminal (9-1) that receives PEI in the above procedure, if the PEI is the PEI that the terminal (9-1) should receive, for example, if the subgroup ID of the PEI matches that of the terminal (9-1), the terminal (9-1) can attempt to receive paging at a later paging occasion.

[0234] A terminal (9-1) operating in Idle / Inactive mode must receive LP-WUS activation / deactivation information and configuration information of the corresponding cell whenever the cell it is camping on changes according to the mobility of the terminal (9-1). At this time, the terminal (9-1) that has received and identified LP-WUS activation / deactivation information of an adjacent cell from a serving cell in advance can recognize whether or not to use the LP-WUR radio during inter-cell movement for the candidate cell, and accordingly can select whether or not to use LP-WUS of the terminal (9-1) immediately before transitioning to the camping cell. From the perspective of the terminal (9-1), the LP-WUS entry / exit point can be set as the camping cell transition point to a specific cell.

[0235] FIG. 10 is a diagram illustrating the structure of a base station according to one embodiment of the present disclosure.

[0236] 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.

[0237] The transceiver refers to 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. For example, the transceiver can transmit system information to the terminal, and can 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.

[0238] The storage unit can store programs and data necessary 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.

[0239] 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.

[0240] FIG. 11 is a diagram illustrating the structure of a terminal according to an embodiment of the present disclosure.

[0241] 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.

[0242] 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.

[0243] 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.

[0244] 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.

[0245] 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.

[0246] 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.

[0247] 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.

[0248] 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.

[0249] 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.

[0250] 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. In a method performed by a terminal of a wireless communication system, A step of receiving setting information related to reception of a terminal's LP-WUS (low power wake up signal) from a base station; Based on the above setting information, a step of switching the MR (main radio) of the terminal to sleep mode and monitoring the LP-WUS using the LP-WUR (low power wake up radio) of the terminal; and A method comprising the step of monitoring a physical downlink control channel (PDCCH) based on the LP-WUS when the LP-WUS is received.

2. In the first paragraph, the step of monitoring the PDCCH comprises: When the above LP-WUS is received, a step of waking up the MR; and A method characterized by comprising a step of monitoring the PDCCH using the MR based on the LP-WUS.

3. In paragraph 1, A method characterized in that it further comprises a step of transmitting terminal capability information including information related to the terminal supporting reception of the LP-WUS to the base station.

4. In paragraph 1, A step of receiving information from the base station instructing to deactivate the LP-WUS before the LP-WUS is received; a step of deactivating the above LP-WUR; and A method characterized in that it further comprises a step of waking up the above MR.

5. In a method performed by a base station of a wireless communication system, A step of transmitting configuration information related to reception of a LP-WUS (low power wake up signal) of a terminal to the terminal; A step of transmitting an LP-WUS to be monitored using the LP-WUR (low power wake up radio) of the terminal based on the above setting information; and A method comprising a step of transmitting a PDCCH (physical downlink control channel) to the terminal based on the LP-WUS.

6. In paragraph 5, A method characterized in that the above PDCCH is received by the terminal using the MR (main radio) of the terminal.

7. In paragraph 5, A method characterized in that it further comprises a step of receiving terminal capability information from the terminal, the terminal including information related to the terminal supporting reception of the LP-WUS.

8. In paragraph 5, A method characterized in that it further comprises a step of transmitting information instructing the terminal to deactivate the LP-WUS before transmitting the LP-WUS to the terminal.

9. In the terminal of a wireless communication system, Transmitter and receiver; and Connected to the above transmitter and receiver, Receives configuration information related to reception of LP-WUS (low power wake up signal) of the terminal from the base station, Based on the above setting information, the MR (main radio) of the terminal is switched to sleep mode, and the LP-WUS is monitored using the LP-WUR (low power wake up radio) of the terminal. A terminal including a control unit that monitors a PDCCH (physical downlink control channel) based on the LP-WUS when the LP-WUS is received.

10. In the 9th paragraph, the control unit, When the above LP-WUS is received, the MR is woken up, A terminal characterized in that it monitors the PDCCH using the MR based on the LP-WUS.

11. In the 9th paragraph, the control unit, A method characterized in that the terminal transmits terminal capability information including information related to supporting reception of the LP-WUS to the base station.

12. In the 9th paragraph, the control unit, Before the LP-WUS is received, information instructing to deactivate the LP-WUS is received from the base station, Disable the above LP-WUR, A method characterized by waking up the above MR.

13. In a base station of a wireless communication system, Transmitter and receiver; and Connected to the above transmitter and receiver, Transmits configuration information related to reception of LP-WUS (low power wake up signal) of the terminal to the terminal, Based on the above setting information, the LP-WUS to be monitored is transmitted using the LP-WUR (low power wake up radio) of the terminal, A base station including a control unit that transmits a PDCCH (physical downlink control channel) to the terminal based on the above LP-WUS.

14. In the 13th paragraph, the control unit, A method characterized in that the terminal receives terminal capability information including information related to the terminal supporting reception of the LP-WUS from the terminal.

15. In the 13th paragraph, the control unit, A method characterized in that, before transmitting the LP-WUS to the terminal, information instructing the terminal to deactivate the LP-WUS is transmitted to the terminal.

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