Network node, terminal, and communication method

Abstract

To allow a network to autonomously control the monitoring of a low-power wakeup signal by a terminal in a wireless communication system.SOLUTION: A network node includes a control unit that determines whether to enable or disable monitoring of a low-power wakeup signal by a terminal, and a transmitting unit that transmits, to the terminal, a predetermined message including instruction information indicating the enabling or disabling of the monitoring of the low-power wakeup signal based on the determination.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a network node, a terminal, and a communication method in a wireless communication system. [Background technology]

[0002] In order to reduce power consumption of terminals, 3GPP (registered trademark) is discussing a technology in which a terminal monitors a low-power wake-up signal (LP-WUS), which operates with lower power consumption, before its own paging occasion (PO). Depending on whether or not the terminal receives an LP-WUS, the terminal can determine whether or not to monitor (decode) a paging message in the subsequent PO. By omitting the operation of monitoring unnecessary paging, power consumption can be reduced.

[0003] Methods for enabling or disabling this LP-WUS monitoring operation for each terminal are being considered. One method for controlling LP-WUS monitoring for each terminal is to use NAS (Non-Access Stratum) signaling. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 38.300 V18.5.0(2025-03) [Non-patent document 2] 3GPP TS 38.401 V18.5.0(2025-03) Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the conventional method using NAS signaling, the LP-WUS monitoring instruction is triggered only by a request from the terminal, i.e., the LP-WUS monitoring instruction from the network to the terminal is included in a registration acceptance message, which is a response to a registration request from the terminal, so there is a risk that the network cannot autonomously control LP-WUS monitoring based on its own judgment or requirements.

[0006] Furthermore, in the conventional method using NAS signaling, the registration request and registration accept messages are sent and received when a terminal registers with the network, which may limit the opportunity to change the LP-WUS monitoring settings, making it difficult to flexibly respond to various changes in circumstances, such as changes in latency requirements or optimization of power saving effects.

[0007] As described above, the conventional method of controlling the monitoring of the terminal's LP-WUS does not allow the network to perform control autonomously and at any timing, making flexible power-saving control difficult. [Means for solving the problem]

[0008] The network node in this embodiment includes a control unit that determines whether to enable or disable monitoring of a low power wake-up signal by a terminal, and a transmission unit that, based on the determination, transmits a predetermined message to the terminal that includes instruction information that instructs the terminal to enable or disable monitoring of the low power wake-up signal. [Effects of the Invention]

[0009] According to this embodiment, in a wireless communication system, the network can autonomously control the monitoring of low-power wake-up signals by terminals. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram illustrating an example of a wireless communication system according to an embodiment of the present invention. [Figure 2]FIG. 10 is a sequence diagram showing a control procedure for enabling or disabling an LP-WUS using conventional NAS signaling. [Figure 3] 10 is a flowchart illustrating an example of the operation of a UE in the present embodiment. [Figure 4] FIG. 2 is a sequence diagram showing an example of an operation procedure in the wireless communication system of the present embodiment. [Figure 5] FIG. 10 is a diagram showing the configuration of information elements included in a conventional configuration update command. [Figure 6A] FIG. 10 is a diagram illustrating an example of the configuration of information elements included in a configuration update command in this embodiment. [Figure 6B] FIG. 10 is a diagram illustrating an example of the configuration of information elements included in a configuration update command in this embodiment. [Figure 7] FIG. 2 is a diagram illustrating an example of a functional configuration of a base station according to the present embodiment. [Figure 8] FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal according to the present embodiment. [Figure 9] FIG. 2 is a diagram illustrating an example of a hardware configuration of a base station or a terminal according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] The present embodiment will be described below with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0012] In operation of the wireless communication system of this embodiment, existing technologies (e.g., LTE and NR (5G)) or future technologies (e.g., 6G) may be used as appropriate. The technologies used in the wireless communication system of this embodiment may not be limited to the above-mentioned LTE, NR, and 6G.

[0013] In the present embodiment described below, terms used in existing technologies, such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel), are used. This is for convenience of description, and similar signals, functions, etc. may be called by other names. The above-mentioned terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even signals used in NR are not necessarily designated as "NR-".

[0014] In this embodiment, the duplex method may be a time division duplex (TDD) method, a frequency division duplex (FDD) method, or other methods (for example, flexible duplex, etc.).

[0015] In this embodiment, when radio parameters etc. are "configured," it may mean that a predetermined value is pre-configured, or that radio parameters notified from a base station or a terminal are set.

[0016] (System Configuration) Fig. 1 is a diagram for explaining a wireless communication system in this embodiment. As shown in Fig. 1, the wireless communication system in this embodiment includes a base station (gNB) 10 and a terminal (UE (User Equipment) 20) 20. Fig. 1 shows one base station 10 and one terminal 20, but this is an example, and there may be a plurality of each.

[0017] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a wireless signal are defined in the time domain and the frequency domain, and the time domain may be defined by the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. A TTI (Transmission Time Interval) in the time domain may be a slot, or a TTI may be a subframe.

[0018] The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signal is, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, via the NR-PBCH and is also referred to as broadcast information. The synchronization signal and system information may be referred to as an SSB (SS / PBCH block). As shown in FIG. 1 , the base station 10 transmits control signals or data to the terminal 20 via DL (Downlink) and receives control signals or data from the terminal 20 via UL (Uplink). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming. Both the base station 10 and the terminal 20 are capable of applying MIMO (Multiple Input Multiple Output) communication to DL or UL. Both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell) and a primary cell (PCell) using Carrier Aggregation (CA). Furthermore, the terminal 20 may perform communication via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using DC (Dual Connectivity).

[0019] The terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or an M2M (Machine-to-Machine) communication module. As shown in Fig. 1, the terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 receives various reference signals transmitted from the base station 10 and measures the propagation path quality based on the reception results of the reference signals.

[0020] The terminal 20 of this embodiment may include a Low-Power Wake-Up Receiver (P-WUR). The LP-WUR is a low-power wake-up receiver, which is a dedicated receiving circuit provided separately from the main receiving unit used for normal communication. While the terminal 20 is in standby mode, the main receiving unit transitions to a deep sleep mode or a power-off mode, and only the LP-WUR is active to monitor the arrival of an LP-WUS. When the LP-WUR detects an LP-WUS, it generates an internal signal to activate the main receiving unit. The active main receiving unit then performs subsequent reception processing, such as monitoring for paging messages.

[0021] 3GPP is studying a technology to enable or disable LP-WUS monitoring operation on a per-terminal basis. By enabling or disabling LP-WUS monitoring on a per-terminal basis, it is possible to reduce delays by disabling LP-WUS for terminals that use delay-sensitive services, reduce the probability of receiving unnecessary paging (false paging probability), and further reduce terminal power consumption.

[0022] There are two methods for controlling the enable / disable of LP-WUS monitoring for each terminal: a method using Non-Access Stratum (NAS) signaling and a method using Radio Resource Control (RRC) signaling. The method using NAS can be used when the network (NW), especially the core network (CN), is the control subject, such as when the parameter determined by NAS signaling, such as the eDRX cycle, is closely related to the NAS signaling. On the other hand, the method using RRC can be used when the base station (gNB) is the control subject.

[0023] Fig. 2 is a sequence diagram showing the control procedure for enabling or disabling an LP-WUS using NAS signaling in the prior art. As shown in Fig. 2, a terminal currently monitoring an LP-WUS can request disabling of the LP-WUS by sending a Registration Request to the CN. The CN then sends a Registration Accept message including an instruction to disable the LP-WUS to the terminal, which causes the terminal to stop monitoring the LP-WUS. On the other hand, a terminal not monitoring the LP-WUS can request activation using a Registration Request.

[0024] However, in the conventional method using NAS signaling described above, the LP-WUS monitoring instruction may be triggered only by a request from the terminal. That is, the LP-WUS monitoring instruction from the network to the terminal is included in a registration acceptance message, which is a response to a registration request from the terminal. This means that the network may not be able to autonomously control the LP-WUS monitoring based on its own judgment or requirements.

[0025] Furthermore, because registration request and registration acceptance messages are mainly sent and received when a device registers to the network, there may be limited opportunities to change the LP-WUS monitoring settings, which may make it difficult to flexibly respond to various motivations, such as changing latency requirements or optimizing power saving effects.

[0026] According to this embodiment, the network can autonomously control LP-WUS monitoring for each terminal at any timing, which enables power consumption reduction and control according to delay requirements.

[0027] An example of operations and settings according to this embodiment will be described below. The operations and settings according to this embodiment described below may be executed independently, or a plurality of operations and settings may be executed in combination.

[0028] (Example of operation) According to this embodiment, it is possible to control whether LP-WUS monitoring is enabled or disabled for each terminal using a predetermined message from the network. A configuration update command in the following description is an example of the predetermined message.

[0029] In this embodiment, the predetermined message for controlling the enabling or disabling of LP-WUS monitoring for each terminal is not limited to a configuration update command, and may be any message whose transmission is autonomously triggered by the network. For example, the predetermined message may be a message (e.g., INITIAL CONTEXT SETUP REQUEST, RRCReconfiguration) transmitted from the network to the terminal.

[0030] The control of enabling or disabling LP-WUS monitoring may be performed for each terminal, or may be performed for each group including multiple terminals.

[0031] FIG. 3 is a flowchart showing an example of the operation of the UE 20 in this embodiment.

[0032] In step S11, the UE 20 receives a configuration update command including an LP-WUS monitoring indication from the network (e.g., gNB 10).

[0033] In step S12, the UE 20 enables or disables the LP-WUS monitoring function according to the instruction included in the received command.

[0034] In step S13, the UE 20 determines whether the received command includes an ACK bit and whether its value is "1". The ACK bit is used to instruct the UE that received the command whether to send an acknowledgment to the network. For example, if the network sets the ACK bit to "1", this means that it requests an acknowledgment from the UE 20. On the other hand, if the ACK bit is "0", this means that it does not request an acknowledgment from the UE 20. Note that the relationship between the value of the ACK bit and whether or not an acknowledgment is requested from the UE 20 may be arbitrary. If the ACK bit is not set, it may mean that it does not request an acknowledgment from the UE 20.

[0035] If the result of the determination is that the ACK bit is "1" (YES), the UE 20 proceeds to step S14 and transmits a UE 20 Configuration Update Complete message including an acknowledgement (ACK) to the LP-WUS monitoring instruction to the network.

[0036] On the other hand, if the ACK bit is not "1" (NO), the UE 20 proceeds to step S15 and does not send the UE configuration update complete message, after which the procedure ends.

[0037] FIG. 4 is a sequence diagram showing an example of a configuration update procedure in the wireless communication system of this embodiment.

[0038] In step S101, the Access and Mobility Management Function (AMF) 30A determines whether a configuration update or re-registration of the UE 20 is necessary. This determination is made based on network requirements, such as changes in delay requirements of the UE 20 or optimization of power saving effects. The AMF 30A may determine whether to enable or disable LP-WUS monitoring for each UE.

[0039] In step S102, the AMF 30A sends a UE configuration update command including an instruction to enable or disable LP-WUS monitoring to the UE 20. This procedure is initiated autonomously by the AMF 30A without waiting for a request from the UE 20.

[0040] In step S103, if the command includes an ACK bit (see step S14 in FIG. 3), the UE 20 sends a UE configuration update complete message including an acknowledgement response to the LP-WUS monitoring instruction to the AMF 30A. The acknowledgement response may include information indicating whether the LP-WUS monitoring configuration has been successfully enabled or disabled in the UE 20 based on the received instruction.

[0041] Thereafter, the AMF 30A may execute information services between the UDM 30C and the SMF 30B (S104) and may update the configuration of the NG-RAN 10 (S105). The UE 20 notifies the lower layers of the configuration based on the received command (S106).

[0042] As a result of this configuration update, various scenarios are possible, such as the UE 20's connectivity to the AMF being unaffected (S107B) or the registration procedure in the CM-CONNECTED state being skipped (S107A). If connectivity is affected (S107C), the AMF 30A triggers an AN Release procedure in step S108, unless a PDU session related to an emergency service exists. After that, the UE 20 transitions to the CM-IDLE state, and then the UE 20 starts the Registration procedure.

[0043] (Example of information element configuration) An example of the structure of a configuration update command including an LP-WUS monitoring instruction in this embodiment will be described.

[0044] (Configuration example 1) In the configuration update command, a new information element (IE) indicating an LP-WUS monitoring indication, for example, "LP-WUS monitoring indication", may be defined. This IE may be composed of one or more of an IEI (Information Element Identifier) ​​bit that identifies the IE, an LP-WUS monitoring indication bit that indicates whether LP-WUS monitoring is enabled or disabled, an ACK bit that requests a response from the UE 20, and a spare bit for future extension.

[0045] (Configuration example 2) In the configuration update command, an existing bit in an existing IE (eg, "Configuration update indication") may be used to indicate the LP-WUS monitoring indication.

[0046] Figure 5 shows an example of a conventional "Configuration update indication" IE. Figures 6A and 6B show an example of a configuration in which one of the reserved bits in this IE is used as the LP-WUS bit. For example, this bit can be defined so that a value of "1" enables LP-WUS monitoring, and a value of "0" disables it. The LP-WUS bit may be located anywhere within an octet, such as the fourth bit (Figure 6A) or the fifth bit (Figure 6B).

[0047] According to the above-described embodiment, the network can autonomously control LP-WUS monitoring for each terminal at any timing, thereby enabling reduction in power consumption and control according to delay requirements.

[0048] (Device configuration) Next, a description will be given of an example of the functional configuration of the base station (gNB) 10, terminal (UE) 20, and network node 30 (e.g., AMF 30A, SMF 30B, UDM 30C) that executes the processes and operations described above. The base station 10 and terminal 20 include functions for executing the above-described embodiments. However, the base station 10 and terminal 20 may each be equipped with only some of the functions of the embodiments.

[0049] <Base station (gNB)> Fig. 7 is a diagram showing an example of the functional configuration of the base station 10 in this embodiment. As shown in Fig. 7, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Fig. 7 is merely an example. The names of the functional divisions and functional units may be any as long as they can perform the operations in this embodiment. The transmitting unit 110 and the receiving unit 120 may be collectively referred to as a communication unit.

[0050] The transmitter 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The transmitter 110 transmits setting information, instructions, notifications, etc. related to a low-power wake-up signal to the terminal 20. The transmitter 110 transmits notifications related to switching of monitoring operations to the terminal. The receiver 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of higher layers from the received signals. The transmitter 110 has a function of transmitting PSS, SSS, PBCH, DL / UL control signals, etc. to the terminal 20. The receiver 120 receives inter-network node messages from other network nodes.

[0051] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20. The content of the setting information is, for example, information on the operations explained in the embodiments.

[0052] The control unit 140 controls the settings, instructions, and notifications related to the operations described in the embodiments. The function unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the function unit related to signal reception in the control unit 140 may be included in the receiving unit 120.

[0053] The network node 30 may have the same functional configuration as the base station 10 shown in FIG.

[0054] <Device (UE)> Fig. 8 is a diagram showing an example of the functional configuration of the terminal 20 in this embodiment. As shown in Fig. 8, the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Fig. 8 is merely an example. The names of the functional divisions and functional units may be any as long as they can execute the operations in this embodiment. The transmitting unit 210 and the receiving unit 220 may be collectively referred to as a communication unit.

[0055] The transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The transmitter 210 transmits capability information in a low-power wake-up signal to the base station 10. The receiver 220 receives various signals wirelessly and acquires higher layer signals from the received physical layer signals. The receiver 220 has a function of receiving PSS, SSS, PBCH, DL / UL / SL control signals, etc. transmitted from the base station 10. The receiver 220 receives paging notification information and configuration information, instructions, and notifications related to the low-power wake-up signal from the base station 10. For example, the receiver 220 receives a low-power wake-up signal from the base station 10. The configuration unit 230 stores various configuration information received from the base station 10 by the receiver 220. The configuration unit 230 also stores pre-configured configuration information. The configuration information includes, for example, information on the operations described in the embodiments.

[0056] As described in the embodiments, the control unit 240 controls settings, instructions, and notifications related to the operations described in the embodiments. A functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and a functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220.

[0057] (Hardware configuration) The block diagrams (FIGS. 7 and 8) used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by hardware, software, or a combination of these. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using a single device that is physically or logically coupled, or may be realized by using two or more physically or logically separated devices that are connected directly or indirectly (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining the single device or the multiple devices with software.

[0058] For example, the base station, terminal, network node, etc. in this embodiment may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 9 is a diagram showing an example of the hardware configuration of a base station and a terminal in one embodiment of the present disclosure. The above-mentioned base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0059] In the present disclosure, the term "apparatus" may be interchangeable with any two terms selected from a set of terms such as circuit, device, unit, module, chip, means, etc. The hardware configurations of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0060] Each function in the base station 10 and the terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001, memory 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls the reading, writing, or both reading and writing of data in the memory 1002 and storage 1003.

[0061] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, a baseband signal processing unit, a call processing unit, etc. may be realized by the processor 1001. Although only one processor 1001 is shown in the figure, there may be multiple processors.

[0062] The processor 1001 reads programs (program codes), software modules, data, etc. from the storage 1003, the communication device 1004, or both the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes in accordance with the programs. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 401 of the terminal 20 may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be made for other functional blocks. While the above-described various processes have been described as being executed by a single processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line, or may be provided to the computer via the communication device 1004, for example.

[0063] The present disclosure also provides a computer program product including a computer program, which may implement the steps of the methods described in the above embodiments when the computer program is executed by a computer (e.g., the processor 1001).

[0064] The memory 1002 is a computer-readable recording medium and may be configured, for example, as a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or a combination of at least two of these. The memory 1002 may also be called a register, a cache, a main memory (primary storage device), or the like. The memory 1002 can store executable programs (program codes), software modules, and the like for executing the wireless communication method according to one embodiment of the present disclosure.

[0065] Storage 1003 is a computer-readable recording medium, and may be, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, or a combination of at least two of these. Storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned storage medium may be, for example, memory 1002, storage 1003, or a database, server, or other appropriate medium including both memory 1002 and storage 1003.

[0066] The communication device 1004 is hardware (transmitting / receiving device) for communicating between computers via a wired network, a wireless network, or both wired and wireless networks, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, or a combination of at least two of these. For example, a transmitting / receiving antenna, an amplifier unit, a transmitting / receiving unit, or a transmission path interface may be realized by the communication device 1004. The transmitting / receiving unit may be implemented as a transmitting unit and a receiving unit that are physically or logically separated.

[0067] The input device 1005 is an input device that receives input from the outside (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, or a combination of at least two of these). The output device 1006 is an output device that performs output to the outside (for example, a display, a speaker, an LED lamp, or a combination of at least two of these). The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0068] The processor 1001, memory 1002, and other devices are connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between the devices.

[0069] The base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), a graphics processing unit (GPU), a neural processing unit (NPU), or a combination of at least two of these, and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0070] The network node 30 may have a hardware configuration similar to that shown in FIG.

[0071] <Additional notes> (Additional note 1) a control unit that determines whether to enable or disable monitoring of a low power wake-up signal by a terminal (e.g., UE 20); A network node (e.g., AMF 30A) comprising: a transmitting unit that transmits a predetermined message to the terminal including instruction information that instructs the terminal to enable or disable monitoring of the low power wake-up signal based on the decision. (Additional note 2) A network node as described in Supplementary claim 1, wherein the specified message includes information indicating whether an acknowledgment response to the specified message is requested from the terminal. (Additional note 3) 2. A network node according to claim 1, wherein the predetermined message is a configuration update command. (Additional note 4) a receiving unit that receives a predetermined message from a network node, the predetermined message including instruction information that instructs the terminal to enable or disable monitoring of a low power wake-up signal; a control unit that enables or disables monitoring of the low power wakeup signal based on the received instruction information. (Additional note 5) The terminal described in Supplementary claim 4, comprising a transmitting unit that transmits the confirmation response to the network node when the specified message includes information indicating a request for a confirmation response to the specified message. (Additional note 6) 1. A communication method for controlling monitoring of a low power wake-up signal by a terminal, comprising: transmitting a predetermined message from a network node to the terminal, the predetermined message including instruction information instructing the terminal to enable or disable monitoring of the low power wake-up signal; and enabling or disabling monitoring of the low power wake-up signal in the terminal based on the instruction information.

[0072] According to the configuration described in the supplementary paragraph, the network can autonomously control LP-WUS monitoring for each terminal at any timing, thereby enabling reduction in power consumption and control according to delay requirements.

[0073] (Supplementary explanation of the embodiment) Although the present embodiment has been described above, the disclosed invention is not limited to such an embodiment, and those skilled in the art will understand various modifications, alterations, alternatives, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; matters described in two or more items may be used in combination as needed, and matters described in one item may apply to matters described in another item (unless inconsistent). The boundaries between functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of the processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 have been described using functional block diagrams. However, such devices may be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to this embodiment and the software operated by the processor of the terminal 20 according to this embodiment may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

[0074] The aspects / embodiments described in the present disclosure may be categorized as Long Term Evolution (LTE), LTE-Advanced (LTE-A), International Mobile Telecommunications-Advanced (IMT-Advanced), 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G-Advanced (5G-A), 6th generation mobile communication system (6G), xth generation mobile communication system (x is, for example, an integer or a decimal number)), Future Radio Access (FRA), New Radio (NR), New radio access (NX), Future generation radio access (FX), Open Radio Access Network (O-RAN), Wideband Code Division Multiple Access (W-CDMA) (registered trademark), Global System for Mobile communications (GSM) (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) Engineers) 802.11, IEEE802.11x (where x is any character string such as b, a, g, n, ac, ax, be, or bn, and when x=n it is called Wi-Fi4, when x=ac it is called Wi-Fi5, when x=ax it is called Wi-Fi6 or Wi-Fi6E, when x=be it is Wi-Fi7, and when x=bn it is called Wi-Fi8, etc. Wi-Fi is a registered trademark.), IEEE802.16 (WiMAX (registered trademark), IEEE802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), network virtualization technology (e.g., NFV (Network Function Virtualization), SFC (Service Function Chaining), SDN (Software Defined Networking)), or LPWA (Low Power Wide Area). Each aspect / embodiment described in the present disclosure may be applied to a system based on a combination of at least two of these technologies. Of course, "based on" may refer not only to a system that uses the technology, but also to a system that uses an extension or modification of the technology.

[0075] In the present disclosure, any two terms selected from a set of terms such as "base station (BS)", "radio base station", "fixed station (fixed station)", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point (AP)", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "radio unit (RU)", "remote unit (RU)", "control unit (CU)", "distributed unit (DU)", "remote radio head (RRH)", "node", "gateway", "terrestrial base station", "stratospheric base station", "unmanned aerial vehicle", "high altitude platform station (HAPS)", "airborne platform", "panel", "cell", "radio access network (RAN)", and "network" may be used interchangeably.

[0076] Each cell accommodated by a base station may be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, a serving cell, or a super cell. In the present disclosure, any two terms selected from a set of terms such as "cell," "sector," "cell group," "carrier," "component carrier," "cluster," "bandwidth part (BWP)," and "carrier bandwidth" may be used interchangeably.

[0077] In the present disclosure, any two terms selected from the set of terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE 20)", "Device", "Module" and "Terminal" may be used interchangeably.

[0078] A terminal may be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, router (e.g., home router, mobile router, etc.), TCU (Telematics Control Unit), or some other suitable terminology.

[0079] The base station and the terminal may each be composed of one or more devices. The devices constituting at least a portion of the base station and the terminal may be called a transmitting device, a receiving device, a communication device, etc. Note that the devices constituting at least a portion of the base station and the terminal may be, for example, an object itself, such as a vehicle, a transport vehicle, an automobile, a motorcycle, a bicycle, a connected car, an excavator, a bulldozer, a wheel loader, a dump truck, a forklift, a train, a bus, a handcar, a rickshaw, a ship and other watercraft, an airplane, a rocket, an unmanned aerial vehicle, a stratospheric base station (e.g., a High Altitude Platform Station (HAPS)), an artificial satellite (e.g., a Low Earth Orbit (LEO) satellite, a Medium Earth Orbit (MEO) satellite, a Geostationary Earth Orbit (GEO) satellite), a drone (registered trademark), a multicopter, a quadcopter, a balloon, or an Internet of Things (IoT) device (e.g., a smart meter, a sensor), or may include, but are not limited to, an object or device mounted on the object. The object may be a moving object (hereinafter referred to as a "moving object"; this does not exclude the case where the moving object is in a stationary state where it is not moving), or may be a fixedly positioned object (hereinafter referred to as a "non-moving object").

[0080] A base station in the present disclosure may be read as a terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)) or communication of a non-terrestrial network (NTN). In this case, the terminal 20 may be configured to have at least some of the functions of the base station 10 described above. Terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "sidelink") or terms corresponding to NTN (for example, feeder link or service link). For example, an uplink channel or a downlink channel may be read as a sidelink channel.

[0081] The present disclosure is also applicable to cases where at least some of the devices constituting the base station and the terminal operate outside the ground (for example, in the atmosphere or outer space).

[0082] In this disclosure, the term "terminal" may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the terminal 20 described above.

[0083] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB))), other signals, or a combination of at least two of these. Note that the physical layer signaling may be referred to as Layer 1 (L1) control information. The MAC signaling may be referred to as a MAC Control Element (CE) or a MAC Protocol Data Unit (PDU), for example. The RRC signaling may be referred to as an RRC message or an information element (IE) in the RRC message. The RRC message may be, for example, a message used for controlling an RRC connection (for example, setup, reconfiguration, establishment, reestablishment, release, or resume), mobility, a measurement report, or notification of a terminal's capabilities, or may be an information element within the message. Notification of information may be explicit or implicit. Note that explicit notification of certain information means notification of the certain information itself, and implicit notification of certain information may mean notification of information other than the certain information, or may mean that the certain information is considered to have been notified when a certain condition is satisfied.Notification of information may include not only notification between the same layers of different devices (e.g., between a lower layer or an upper layer of the base station 10 and the terminal 20) but also notification between different layers in the same or different devices (e.g., between a lower layer and an upper layer in the base station 10 or the terminal 20). Notification of information from one device to another device may be performed via one or more devices. With regard to any information (e.g., a variable, a constant, a parameter, a setting) described in the present disclosure, even if not specifically specified in the above embodiments, information indicating / specifying (or related to) the any information (value) may be notified from any first device (e.g., a terminal / base station) to any second device (e.g., a base station / terminal).

[0084] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0085] In the present disclosure, a specific operation described as being performed by a base station may be performed by its upper node or by some of its upper nodes (e.g., CU, RU, or DU, etc.) in some cases. It is clear that various operations performed for communication with a terminal in a RAN or core network may be performed by at least some of the base station and other network nodes other than the base station. The other network node may be one node or a combination of multiple nodes. The network node is, for example, a node provided in various core networks such as EPC (Evolved Packet Core) and 5GC (5G Core Network), and provides one or more network functions (NF: Network Functions), but is not limited to this.

[0086] In the present disclosure, the action of "a terminal receives information from a base station" accompanies the action of "the base station transmits the information to the terminal", "the base station generates the information", or both. Similarly, the action of "a terminal transmits information to a base station" accompanies the action of "the base station receives the information from the terminal". The actions of "the terminal is configured to..." or "configure UE 20 to..." may include the action of "the base station transmits configuration information regarding the configuration of the terminal" and the action of "the terminal configures a predetermined operation based on the configuration information".

[0087] Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched depending on the implementation.

[0088] The present disclosure has been described above, but it is for illustrative purposes only, and the present invention is not limited to the aspects / embodiments described in the present disclosure. The present disclosure can be implemented in modified and altered forms without departing from the spirit of the invention. The present disclosure and its modifications and alterations are included in the scope of the present invention and its equivalents.

[0089] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0090] The radio resource may be defined by a combination of resource units in one or more domains, such as the time domain, the frequency domain, the spatial domain, the code domain, and the power domain.

[0091] For example, resources in the time domain may be defined by one or more time units. The one or more time units may include, but are not limited to, a radio frame, a subframe, a slot, a symbol, a transmission time interval (TTI), or a combination of at least two of these. The time unit may be a fixed-length time unit independent of numerology, a variable-length time unit dependent on numerology, or both. Examples of fixed-length time units include, but are not limited to, a subframe consisting of one or more slots and a radio frame including multiple subframes. Examples of variable-length time units include, but are not limited to, a symbol and a slot including a fixed number of symbols. Note that a certain time unit may be divided into time units shorter than the certain time unit. Examples of shorter time units include, but are not limited to, a minislot consisting of fewer symbols than the number of symbols constituting a slot. The above-described time units may include, for example, time units used as units for scheduling, link adaptation, etc. Any time unit in the present disclosure may be read as another time unit.

[0092] Numerology is a parameter that defines the physical layer structure, and may be a parameter based on at least one of subcarrier spacing (SCS), symbol length, cyclic prefix length, and sampling time, for example.

[0093] Resources in the frequency domain may be defined, for example, by one or more frequency units. The one or more frequency units may include, for example, subcarriers, resource blocks (RBs), bandwidth parts (BWPs), carrier bandwidths, or a combination of at least two of these, but the terminology of the frequency units is not limited to these. The number of subcarriers included in a frequency unit may be a fixed number regardless of numerology, or may be a variable number that changes depending on numerology. For example, an RB is composed of a predetermined number of consecutive subcarriers in the frequency domain, and the number of subcarriers included in the RB may be the same regardless of numerology, for example, 12, but is not limited to this. A BWP may be composed, for example, of one or more consecutive RBs within a certain carrier bandwidth, but is not limited to this. One or more BWPs may be configured in one carrier for a terminal, and at least one of the BWPs may be activated. Any frequency unit in the present disclosure may be interchangeable with another frequency unit.

[0094] Resources in both the time domain and the frequency domain may be defined by one or more time / frequency units, each of which is composed of a time unit and a frequency unit, such as, but not limited to, a resource element (RE) composed of one symbol and one subcarrier, a resource element group (REG) composed of a predetermined number of REs, or a control resource set (CORESET) composed of a predetermined number of symbols and a predetermined number of RBs.

[0095] The resources in the spatial domain may be defined, for example, by one or more spatial units, including, but not limited to, a beam, a layer of a multi-input multi-output (MIMO), an antenna port, or a combination of at least two of these.

[0096] The resources in the code domain may be defined by one or more code units, such as, but not limited to, a cyclic shift (CS), an orthogonal cover code (OCC), or a combination thereof.

[0097] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0098] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc. [Explanation of symbols]

[0099] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 terminals 210 Transmitter 220 Receiving unit 230 Setting Section 240 Control Unit 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication equipment 1005 Input Device 1006 Output Device

Claims

1. a control unit that determines whether to enable or disable monitoring of a low power wake-up signal by the terminal; a transmitter configured to transmit, based on the determination, a predetermined message to the terminal, the predetermined message including instruction information for instructing the terminal to enable or disable monitoring of the low power wakeup signal.

2. The network node according to claim 1 , wherein the predetermined message includes information indicating whether an acknowledgement response to the predetermined message is required from the terminal.

3. The network node according to claim 1 , wherein the predetermined message is a configuration update command.

4. a receiving unit that receives a predetermined message from a network node, the predetermined message including instruction information that instructs the terminal to enable or disable monitoring of a low power wake-up signal; a control unit that enables or disables monitoring of the low power wakeup signal based on the received instruction information.

5. The terminal according to claim 4 , further comprising: a transmitter configured to transmit the acknowledgment to the network node when the predetermined message includes information indicating a request for an acknowledgment to the predetermined message.

6. 1. A communication method for controlling monitoring of a low power wake-up signal by a terminal, comprising: transmitting a predetermined message from a network node to the terminal, the predetermined message including instruction information instructing the terminal to enable or disable monitoring of the low power wake-up signal; and enabling or disabling monitoring of the low power wake-up signal in the terminal based on the instruction information.

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