Method and device for transmitting and receiving signals in wireless communication system

Abstract

A method performed by a user equipment (UE), according to at least one from among embodiments disclosed in the present disclosure, comprises the steps of: receiving, from a base station, a low power-wake up signal (LP-WUS) including a payload and a sequence; detecting the payload and / or the sequence from the LP-WUS on the basis of the LP-WUR type of the UE; and initiating, on the basis of the detected payload and / or sequence, downlink control channel monitoring transmitted from the base station, wherein the payload and the sequence include the same information for the downlink control channel monitoring.

Description

Method and device for transmitting and receiving signals in a wireless communication system

[0001] The present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting or receiving an uplink / downlink wireless signal in a wireless communication system.

[0002] The 5G mobile communications system, the successor to LTE (long-term evolution), is a new, clean-slate mobile communications system characterized by high performance, low latency, and high availability. 5G NR can utilize all available spectrum resources, from low-frequency bands below 1 GHz, to intermediate-frequency bands between 1 GHz and 10 GHz, and high-frequency (millimeter wave) bands above 24 GHz. 6G mobile communications systems are being developed based on the underlying technologies of 5G mobile communications.

[0003] The 6G (wireless) system aims to provide (i) very high data rates per device, (ii) a very large number of connected devices, (iii) global connectivity, (iv) very low latency, (v) low energy consumption for battery-free Internet of Things (IoT) devices, (vi) ultra-reliable connectivity, and (vii) connected intelligence with machine learning capabilities. The vision of the 6G system can be divided into four aspects: intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity.

[0004] The technical task to be achieved in the present disclosure is to provide a method for efficiently performing a wireless signal transmission and reception process and a device therefor. As an example, the present disclosure may provide a method and a device therefor capable of efficiently receiving an LP-WUS composed of a payload and sequence depending on the type of UE.

[0005] The technical tasks to be achieved are not limited to the technical tasks mentioned above, and other technical tasks not mentioned can be inferred from the description below.

[0006] According to one aspect of the present disclosure, a method performed by a UE (User Equipment) comprises the steps of: receiving, from a base station, a Low Power-Wake Up Signal (LP-WUS) comprising a payload and a sequence; detecting, based on a type of a Low Power-Wake Up Receiver (LP-WUR) of the UE, at least one of the payload and the sequence from the LP-WUS; and initiating monitoring of a downlink control channel transmitted from the base station based on the detected at least one payload or sequence, wherein the payload and the sequence include identical information for monitoring the downlink control channel.

[0007] According to one aspect of the present disclosure, a UE (User Equipment) comprises at least one processor; and at least one computer memory storing instructions that, when executed by the at least one processor, cause the reader to perform operations, the operations comprising: receiving, from a base station, a Low Power-Wake Up Signal (LP-WUS) comprising a payload and a sequence; detecting, based on a type of a Low Power-Wake Up Receiver (LP-WUR) of the UE, at least one of the payload or the sequence from the LP-WUS; and initiating monitoring of a downlink control channel transmitted from the base station based on the detected at least one payload or sequence, wherein the payload and the sequence include identical information for monitoring the downlink control channel.

[0008] Preferably, the payload is detected in the LP-WUS based on the LP-WUR being of the first type, the sequence is detected in the LP-WUS based on the LP-WUR being of the second type, or both the payload and the sequence are detected.

[0009] Preferably, the step of receiving the LP-WUS may include the step of receiving the LP-WUS in a resource area related to a UE group to which the UE belongs.

[0010] Preferably, the payload consists of at least one OOK (On Off Keying) symbol, and the sequence is overlaid on the at least one OOK symbol.

[0011] Prior to performing the above operations, it is preferable that the UE report information related to the type of LP-WUR of the UE to the base station.

[0012] Preferably, the UE initiates monitoring of the downlink control channel after a specific time has elapsed from the time of receiving the LP-WUS, and information related to the specific time is set as upper layer signaling.

[0013] Meanwhile, a method performed by a base station according to one aspect of the present disclosure includes a step of generating a LP-WUS (Low Power-Wake Up Signal) composed of a payload and a sequence, wherein the payload and the sequence include the same information for monitoring a downlink control channel; a step of transmitting the LP-WUS (Low Power-Wake Up Signal) to a UE (User Equipment); and a step of transmitting the downlink control channel to the UE.

[0014] The above problem solving methods are only some of the examples of this specification, and various examples reflecting the technical features of this specification can be derived and understood by a person having ordinary knowledge in the relevant technical field based on the detailed description below.

[0015] According to one embodiment, the wireless signal transmission and reception process can be performed efficiently. For example, the reception of an LP-WUS consisting of a payload and a sequence can be performed efficiently depending on the type of UE.

[0016] Other effects not mentioned can be inferred from the description below.

[0017] The accompanying drawings, which are included as part of the detailed description to aid in understanding implementations of this specification, provide examples of implementations of this specification and, together with the detailed description, illustrate implementations of this specification.

[0018] Figure 1 illustrates a flexible network topology to which some examples of this specification may be applied.

[0019] FIG. 2 illustrates an example of a communication system applicable to the present disclosure.

[0020] FIG. 3 illustrates an example of a wireless device applicable to the present disclosure.

[0021] FIG. 4 illustrates a communication procedure between a first node (e.g., a terminal) and a second node (e.g., a base station) applicable to the present disclosure.

[0022] Figure 5 illustrates a general functional architecture for an AI / ML model.

[0023] Figure 6 illustrates a communication procedure between a first node (e.g., terminal) and a second node (e.g., base station) to which an AI / ML model is applied.

[0024] FIG. 7 illustrates an electromagnetic spectrum according to one embodiment of the present disclosure.

[0025] FIG. 8 illustrates an example of a procedure for transmitting system information for THz communication to which the present disclosure applies.

[0026] Figure 9 illustrates a beam management procedure applicable to the present disclosure.

[0027] FIG. 10 illustrates an example of a typical scenario of an NTN based on a transparent payload, according to one embodiment of the present disclosure.

[0028] FIG. 11 illustrates an example of a typical scenario of an NTN based on a regenerative payload, according to one embodiment of the present disclosure.

[0029] FIG. 12 illustrates an example of a sensing operation according to one embodiment of the present disclosure.

[0030] FIG. 13 illustrates time / frequency resources for sensing operations according to one embodiment of the present specification.

[0031] FIG. 14 illustrates a procedure related to a sensing operation according to one embodiment of the present specification.

[0032] FIG. 15 is a diagram illustrating LP-WUS related operations for a terminal in CONNECTED mode proposed in the present disclosure.

[0033] FIG. 16 is a flowchart illustrating an example of a UE receiving LP-WUS according to the present disclosure.

[0034] FIG. 17 is a flowchart illustrating an example of a base station transmitting LP-WUS to a UE according to the present disclosure.

[0035] As used herein, "A or B" can mean "only A," "only B," or "both A and B." In other words, as used herein, "A or B" can be interpreted as "A and / or B." For example, as used herein, "A, B or C" can mean "only A," "only B," "only C," or "any combination of A, B and C."

[0036] As used herein, a slash ( / ) or a comma can mean "and / or." For example, "A / B" can mean "A and / or B." Accordingly, "A / B" can mean "only A," "only B," or "both A and B." For example, "A, B, C" can mean "A, B, or C."

[0037] In this specification, "at least one of A and B" may mean "only A", "only B" or "both A and B". Additionally, in this specification, the expressions "at least one of A or B" or "at least one of A and / or B" may be interpreted identically to "at least one of A and B".

[0038] Additionally, in this specification, “at least one of A, B and C” can mean “only A,” “only B,” “only C,” or “any combination of A, B and C.” Additionally, “at least one of A, B or C” or “at least one of A, B and / or C” can mean “at least one of A, B and C.”

[0039] Additionally, parentheses used herein may mean "for example." Specifically, when "control information (ABC)" is indicated, "ABC" may be described as an example of "control information." For example, "control information" may include DEF as another example. In other words, "control information" in this specification is not limited to "ABC," and "ABC" may be described as an example of "control information." Furthermore, even when indicated as "control information (i.e., ABC)," "ABC" may be described as an example of "control information."

[0040] Additionally, in this specification, terms such as “first,” “second,” etc. are used only for the purpose of distinguishing one component from another component and are not used to limit the components, and do not limit the order or importance between the components unless specifically limited. Accordingly, a first component in one embodiment of this specification may be referred to as a second component in another embodiment, and similarly, a second component in one embodiment may be referred to as a first component in another embodiment.

[0041] In the following explanation, ‘when, if, in case of’ can be replaced with ‘based on’.

[0042] Technical features individually described in a single drawing in this specification may be implemented individually or simultaneously.

[0043] In this specification, a terminal is a user equipment (UE) or a consumer-side device, and may also be referred to as a base station / second node / IAB node / first node that receives / transmits signals from / to a Transmission-Reception Point (TRP). A terminal may correspond to a physical node or a logical node. A terminal may correspond to an endpoint on the user side, or may correspond to an intermediate point between other endpoints. In communication between two points that are not limited to endpoints (including one-to-one / many-to-one / one-to-many / many-to-many communication), a terminal may correspond to a served node. A terminal may be a node with a fixed location, or a node with an unfixed location (or mobile).

[0044] In this specification, a base station (BS) is a device on the network side, and may also be called a second node / IAB node / x-NodeB (x-NodeB, x may be an abbreviation related to radio access technology (RAT)) / Transmission-Reception Point (TRP). A BS may correspond to a physical node or a logical node. A BS may correspond to an endpoint on the network side, or may correspond to an intermediate point between other endpoints. In communication between two points that are not limited to endpoints (including one-to-one / many-to-one / one-to-many / many-to-many communication), a BS may correspond to a serving node. A BS may be a node with a fixed location, or a node with an unfixed location.

[0045] In this specification, higher layer parameters may be set for the terminal, preset, or predefined. For example, the base station may transmit higher layer parameters to the terminal. For example, the terminal may transmit parameters such as capabilities to the base station as higher layer parameters. For example, the higher layer parameters may be transmitted via radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0046] In this specification, the information / state / parameter being “configured or pre-configured” can be interpreted as the information / state / parameter being provided / pre-provided to the terminal through pre-defined signaling (e.g., SIB, MAC, RRC) from the base station. In this specification, the information / state / parameter being “defined or pre-defined” can be interpreted as the information / state / parameter being known in advance or pre-stored at the base station and the terminal without signaling between the base station and the terminal.

[0047] The technology described in this specification can be used in various wireless communication systems such as CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), and SC-FDMA (single carrier frequency division multiple access). CDMA can be implemented with wireless technologies such as UTRA (universal terrestrial radio access) or CDMA2000. TDMA can be implemented with wireless technologies such as GSM (global system for mobile communications) / GPRS (general packet radio service) / EDGE (enhanced data rates for GSM evolution). OFDMA can be implemented with wireless technologies such as IEEE (Institute of Electrical and Electronics Engineers) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (evolved UTRA), LTE (long term evolution), and 5G NR.

[0048] The technology described in this specification can be implemented with 6G wireless technology and applied to various 6G systems. For example, the 6G system can have key factors such as enhanced mobile broadband (eMBB), ultra-reliable low latency communications (URLLC), massive machine-type communication (mMTC), artificial intelligence (AI) integrated communication, tactile internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0049] Figure 1 illustrates a flexible network topology to which some examples of this specification may be applied.

[0050] To compensate for incomplete network coverage areas, a network topology that allows for more flexible and resilient split radio access networks (RANs) may be considered. For this purpose, various nodes, such as IAB nodes, relays, and RF repeaters, as illustrated in the example in Figure 1, may be applied, or NTNs may be integrated. For example, an IAB node may correspond to a node that provides wireless backhaul. For example, a relay may refer to any intermediate point, or in the case of a sidelink relay where a terminal functions as a relay, it may collectively refer to a terminal-to-network (U2N) relay and a terminal-to-terminal (U2U) relay. For example, an RF repeater may correspond to a node that simply performs the function of signal amplification and forwarding, while a network-controlled repeater may not only amplify and forward signals but also adjust transmission and reception settings based on information provided by the network. For example, an NTN node may correspond to a satellite or aircraft that provides NTN coverage that is difficult for terrestrial networks to provide. In addition to these examples, various intermediate points can be introduced to improve the network topology.

[0051] Referring to Figure 1, a split RAN can support the division of a base station into a centralized unit (CU) and one or more distributed units (DUs). The CU and DU can correspond to logical units. The CU can be further divided into a control plane (CP) portion and one or more user plane (UP) portions. Since a failure in the CU-CP affects not only the CU-UP but also the DUs, various intermediate points can be introduced to compensate for this.

[0052] An intermediate point may correspond to a terminal or a base station, depending on its relationship to other nodes. For example, an IAB node may include a mobile-termination (MT) portion and a unit (DU). The MT may connect the IAB node to a donor node. The unit (DU) of an IAB node may serve other terminals or connect to other IAB nodes to provide multi-hop wireless backhaul to the terminal. In other words, an IAB node may correspond to a base station in its relationship to a user-side node, and to a terminal in its relationship to a network-side node.

[0053] In some examples of this specification, the description of a terminal can be equally applied not only to a user-side endpoint, but also to an intermediate point corresponding to a terminal in a relative relationship with a network-side endpoint. Similarly, in some examples of this specification, the description of a base station can be equally applied not only to a network-side endpoint, but also to an intermediate point corresponding to a base station in a relative relationship with a user-side endpoint. However, in most cases where there is no additional description of the operations of three or more entities, the communicating entities in this specification are briefly described as terminals and / or base stations (or first nodes and / or second nodes), and the terms terminal and / or base stations (or first nodes and / or second nodes) are interpreted to include / replace any endpoint or any intermediate point in relation to other nodes.

[0054] That is, in some examples of this specification, for the sake of simplicity of explanation, the subjects of the operation may be referred to as a base station and / or a terminal (or a first node and / or a second node). In addition, the terms base station and / or terminal (or a first node and / or a second node) may also be interpreted / replaced as in the following examples: For example, the base station (or a first node) and the terminal (or a second node) may respectively correspond to the first endpoint and the second endpoint; may respectively correspond to the endpoint and the intermediate point; may respectively correspond to the intermediate point and the endpoint; or may respectively correspond to the first intermediate point and the second intermediate point.

[0055] In this specification, there may be zero or more intermediate points between the base station and the terminal. If intermediate points exist, they may be IAB nodes, relays, RF repeaters, NTN (non-terrestrial network) nodes, or nodes supporting other functions. An intermediate point may be a node with a fixed location or a node with an unfixed location.

[0056] Figure 2 illustrates a communication system applicable to the present disclosure.

[0057] The communication system (100) of FIG. 2 includes a wireless device (110), a network device (120), and a network (130). Here, the wireless device (110) refers to a device that performs communication using a wireless access technology (e.g., LTE, LTE-A, LTE-A pro, NR, 5G, 5G-A, 6G), and may be referred to as a communication / wireless / 5G / 6G device. Although not limited thereto, the wireless device (110) may include a robot (110a), a vehicle (110b-1, 110b-2), an XR (extended reality) device (110c), a hand-held device (110d), a home appliance (110e), an IoT (Internet of Things) device (110f), and an AI (artificial intelligence) device / server (110g). For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing vehicle-to-vehicle communication, etc. Here, the vehicle (110b-1, 110b-2) may include an unmanned aerial vehicle (UAV) (e.g., a drone). The XR device (110c) includes an augmented reality (AR) / virtual reality (VR) / mixed reality (MR) device, and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) equipped in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, etc. The portable device (110d) may include a smartphone, a smart pad, a wearable device (e.g., a smart watch, smart glasses), a computer (e.g., a laptop, etc.), etc. The home appliance (110e) may include a TV, a refrigerator, a washing machine, etc. The IoT device (110f) may include a sensor, a smart meter, etc. The wireless device (110) may correspond to a terminal (or first node) or an intermediate point.The network device (120) may correspond to a base station (or second node) or another intermediate point. For example, the network device (120) may also be implemented as a wireless device (110), and a specific wireless device (120a) may act as a network device (120) to another wireless device (110).

[0058] Wireless devices (110a to 110f) can be connected to a network (130) via a network device (120). AI technology can be applied to the wireless devices (110a to 110f), and the wireless devices (110a to 110f) can be connected to an AI server (110g) via a network (130). The network (130) can be configured using a 3G network, a 4G (e.g., LTE) network, a 5G (e.g., NR), or a 6G network. The wireless devices (110a to 110f) can communicate with each other via the network device (120) / network (130), but can also communicate directly (e.g., sidelink communication) without going through the network device (120) / network (130). For example, vehicles (110b-1, 110b-2) can communicate directly (e.g., V2V (vehicle to vehicle) / V2X (vehicle to everything) communication). Additionally, IoT devices (110f) (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (110a to 110f).

[0059] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (110a to 110f) / network devices (120), network devices (120) / network devices (120). Here, the wireless communication / connection can be established through various wireless access technologies such as uplink / downlink communication (150a), sidelink communication (150b) (or D2D communication), and communication between network devices (150c) (e.g., relay, IAB (integrated access backhaul)). Through the wireless communication / connection (150a, 150b, 150c), the wireless device and the network device / wireless device, and the network device and the network device can transmit / receive wireless signals to each other. For example, the wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, based on various descriptions of the present disclosure, at least some of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), resource allocation processes, etc. may be performed.

[0060] FIG. 3 illustrates an example of a wireless device applicable to the present disclosure.

[0061] Referring to FIG. 3, the wireless device (200) can transmit and receive wireless signals via various wireless access technologies (e.g., LTE, LTE-A, LTE-A pro, NR, 5G, 5G-A, 6G). The wireless device (200) includes at least one processor (202) and at least one memory (204), and may additionally include at least one transceiver (206) and / or at least one antenna (208).

[0062] The processor (202) controls the memory (204) and / or the transceiver (206), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (202) may process information in the memory (204) to generate first information / signal, and then transmit a wireless signal including the first information / signal via the transceiver (206). In addition, the processor (202) may receive a wireless signal including second information / signal via the transceiver (206), and then store information obtained from signal processing of the second information / signal in the memory (204). The memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may store software code including instructions for performing some or all of the processes controlled by the processor (202), or for performing the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed herein. Here, the processor (202) and the memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology. The transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals via at least one antenna (208). The transceiver (206) may include a transmitter and / or a receiver. The transceiver (206) may be used interchangeably with an RF (radio frequency) unit. In the present disclosure, a wireless device may also mean a communication modem / circuit / chip.

[0063] Hereinafter, the hardware elements of the wireless device (200) will be described in more detail. Although not limited thereto, at least one protocol layer may be implemented by at least one processor (202). For example, at least one processor (202) may implement at least one layer (e.g., a functional layer such as physical (PHY), media access control (MAC), radio link control (RLC), packet data convergence protocol (PDCP), radio resource control (RRC), and service data adaptation protocol (SDAP)). At least one processor (202) may generate at least one Protocol Data Unit (PDU) and / or at least one Service Data Unit (SDU) according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. At least one processor (202) may generate a message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. At least one processor (202) can generate a signal (e.g., a baseband signal) including a PDU, an SDU, a message, control information, data or information according to the functions, procedures, proposals and / or methods disclosed in this document, and provide the signal to at least one transceiver (206). At least one processor (202) can receive a signal (e.g., a baseband signal) from at least one transceiver (206) and obtain the PDU, SDU, message, control information, data or information according to the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in this document.

[0064] At least one processor (202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. The at least one processor (202) may be implemented by hardware, firmware, software, or a combination thereof. For example, at least one application specific integrated circuit (ASIC), at least one digital signal processor (DSP), at least one digital signal processing device (DSPD), at least one programmable logic device (PLD), or at least one field programmable gate array (FPGA) may be included in the at least one processor (202). The descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. The descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document may be included in the at least one processor (202), or may be stored in at least one memory (204) and driven by the at least one processor (202). The descriptions, functions, procedures, suggestions, methods and / or flowcharts disclosed in this document may be implemented using firmware or software in the form of code, instructions and / or sets of instructions.

[0065] At least one memory (204) can be connected to at least one processor (202) and can store various forms of data, signals, messages, information, programs, codes, instructions and / or commands. The at least one memory (204) can be configured as a read only memory (ROM), a random access memory (RAM), an erasable programmable read only memory (EPROM), a flash memory, a hard drive, a register, a cache memory, a computer readable storage medium and / or a combination thereof. The at least one memory (204) can be located internally and / or externally to the at least one processor (202). In addition, the at least one memory (204) can be connected to the at least one processor (202) via various technologies such as a wired or wireless connection.

[0066] At least one transceiver (206) can transmit user data, control information, wireless signals / channels, etc., mentioned in the methods and / or flowcharts of this document to at least one other device. At least one transceiver (206) can receive user data, control information, wireless signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts disclosed in this document from at least one other device. For example, at least one transceiver (206) can be connected to at least one processor (202) and can transmit and receive wireless signals. For example, at least one processor (202) can control at least one transceiver (206) to transmit user data, control information, or wireless signals to at least one other device. Furthermore, at least one processor (202) can control at least one transceiver (206) to receive user data, control information, or wireless signals from at least one other device. In addition, at least one transceiver (206) may be connected to at least one antenna (208), and at least one transceiver (206) may be configured to transmit and receive user data, control information, wireless signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods and / or operation flowcharts disclosed in this document through at least one antenna (208). In this document, at least one antenna may be a plurality of physical antennas or a plurality of logical antennas (e.g., antenna ports). At least one transceiver (206) may convert the received wireless signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals / channels, etc. using at least one processor (202). At least one transceiver (206) may convert the processed user data, control information, wireless signals / channels, etc. from baseband signals to RF band signals using at least one processor (202).For this purpose, at least one transceiver (206) may include an (analog) oscillator and / or filter.

[0067] The components of the wireless device described with reference to FIG. 3 may be referred to by different terms in terms of functionality. For example, the processor (202) may be referred to as a control unit, the transceiver (206) as a communication unit, and the memory (204) as a storage unit. In some cases, the communication unit may be used to mean at least a portion of the processor (202) and the transceiver (206).

[0068] The structure of the wireless device described with reference to FIG. 3 can be understood as the structure of at least a portion of various devices. For example, the structure of the wireless device illustrated in FIG. 3 can be at least a portion of various devices described with reference to FIG. 2 (e.g., a robot (110a), a vehicle (110b-1, 110b-2), an XR device (110c), a portable device (110d), a home appliance (110e), an IoT device (110f), an AI device / server (110g)). Furthermore, according to various embodiments, in addition to the components illustrated in FIG. 3, the device may further include other components.

[0069] For example, the device may be a portable device such as a smartphone, a smart pad, a wearable device (e.g., a smart watch, smart glasses), or a portable computer (e.g., a laptop, etc.). In this case, the device may further include at least one of a power supply unit that supplies power and includes a wired / wireless charging circuit, a battery, etc., an interface unit that includes at least one port for connection with another device (e.g., an audio input / output port, a video input / output port), and an input / output unit for inputting and outputting image information / signals, audio information / signals, data, and / or information input from a user.

[0070] For example, the device may be a mobile device such as a mobile robot, a vehicle, a train, an aerial vehicle (AV), a ship, etc. In this case, the device may further include at least one of a driving unit including at least one of an engine, a motor, a power train, wheels, brakes, and a steering unit of the device, a power supply unit including a wired / wireless charging circuit, a battery, etc. that supplies power, a sensor unit that senses status information, environmental information, and user information of the device or its surroundings, an autonomous driving unit that performs functions such as path maintenance, speed control, and destination setting, and a position measurement unit that obtains location information of the mobile device through a global positioning system (GPS) and various sensors.

[0071] For example, the device may be an XR device such as an HMD, a head-up display (HUD) installed in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, etc. In this case, the device may further include at least one of a power supply unit that supplies power and includes a wired / wireless charging circuit, a battery, etc., an input / output unit that obtains control information, data, etc. from the outside and outputs the generated XR object, and a sensor unit that senses status information, environmental information, and user information of the device or the surroundings of the device.

[0072] For example, the device may be a robot that can be classified into industrial, medical, household, military, etc. types depending on the purpose or field of use. In this case, the device may further include at least one of a sensor unit that senses status information, environmental information, and user information of the device or its surroundings, and a driving unit that performs various physical actions, such as moving the robot joints.

[0073] For example, the device may be an AI device such as a TV, a projector, a smartphone, a PC, a laptop, a digital broadcasting terminal, a tablet PC, a wearable device, a set-top box (STB), a radio, a washing machine, a refrigerator, digital signage, a robot, a vehicle, etc. In this case, the device may further include at least one of an input unit that acquires various types of data from the outside, an output unit that generates output related to sight, hearing, or touch, a sensor unit that senses status information, environmental information, and user information of the device or its surroundings, and a training unit that trains a model composed of an artificial neural network using learning data.

[0074] The structure of the wireless device illustrated in FIG. 3 may be understood as a part of a terminal (or first node), or as a part of an intermediate point, or as a part of a base station (or second node). If the device illustrated in FIG. 3 is a base station (or second node), the device may further include a wired transceiver for front haul and / or back haul communications. However, if the front haul and / or back haul communications are based on wireless communications, at least one transceiver (206) illustrated in FIG. 3 may be used for front haul and / or back haul communications, and a wired transceiver may not be included.

[0075] FIG. 4 illustrates a communication procedure between a first node (e.g., a terminal) and a second node (e.g., a base station) applicable to the present disclosure.

[0076] The second node of FIG. 4 supports dynamic spectrum sharing (DSS), which can provide connectivity to both nodes implementing 6G technology and nodes implementing pre-6G wireless communication technologies (e.g., 5G, 4G). That is, the first node of FIG. 4 can implement either 6G technology or pre-6G wireless communication technologies (e.g., 5G, 4G). Furthermore, the first node and / or the second node can support full duplex mode as well as non-overlapping full duplex mode.

[0077] In Fig. 4, for the sake of simplicity of explanation, the first node and the second node are assumed to be a terminal and a base station, respectively, and operations of the terminal (110) and the base station (120) transmitting and / or receiving data and operations performed prior thereto are illustrated. However, the operations of Fig. 4 are not limited to operations between the terminal and the base station, and may be interpreted as operations between the first node and the second node. In addition, although Fig. 4 illustrates direct wireless signal transmission and reception operations between the terminal (110) and the base station (120), one or more intermediate points may exist between the terminal (110) and the base station (120), and wireless signals may be transmitted and received via one or more intermediate points.

[0078] Referring to FIG. 4, in step 101, the terminal (110) and the base station (120) perform synchronization. For example, the terminal (110) performs an initial cell search operation. Specifically, the terminal (110) can detect a synchronization signal for connection to at least one base station transmitted from the base station (120) according to a predefined rule. Here, the synchronization signal can include a plurality of synchronization signals classified according to structure or purpose (e.g., a first synchronization signal (e.g., a primary synchronization signal), a second synchronization signal (e.g., a secondary synchronization signal), etc.). Through this, the terminal (110) can confirm the boundary of a unit (e.g., a frame, a subframe, a slot, and / or a symbol) constituting a wireless signal transmission of the base station (120) and obtain information (e.g., a cell identifier) ​​about the base station (120).

[0079] In step 103, the terminal (110) obtains system information transmitted from the base station (120). The system information is information related to the properties, characteristics, and / or capabilities of the base station (120) required to access the base station (120) and use the service, and may be classified according to the content (e.g., whether it is essential for access), transmission structure (e.g., channel used, whether provided on-demand), etc., and may be classified into, for example, first system information (e.g., master information block (MIB), primary system information), second system information (e.g., system information block (SIB), secondary system information), etc. If necessary, the terminal (110) may transmit a signal requesting system information before receiving the system information. However, the request and provision of the system information may be performed after the random access procedure described below.

[0080] In step 105, the terminal (110) and the base station (120) perform a random access procedure. The terminal (110) may transmit and / or receive at least one message (e.g., a random access preamble, a random access response (RAR) message, etc.) for the random access procedure based on information related to a channel for the random access procedure of the base station (120) obtained through system information (e.g., a channel position, a channel structure, a structure of a supported preamble, etc.). For example, the terminal (110) may transmit a first message (e.g., a preamble, MSG1) through the channel for the random access procedure, receive a second message (e.g., an RAR message, MSG2), transmit a third message (e.g., MSG3) including information related to the terminal (110) (e.g., identification information) to the base station (120) using scheduling information included in the second message, and receive a fourth message (e.g., MSG4) for contention resolution and / or connection establishment. As another example, the first and third messages may be sent and received as one message, or the second and fourth messages may be sent and received as one message.

[0081] In step 107, the terminal (110) and the base station (120) perform signaling of control information. Here, the control information may be defined in various layers, such as a layer that controls a connection (e.g., a radio resource control (RRC) layer), a layer that handles mapping between logical channels and transport channels (e.g., a media access control (MAC) layer), and a layer that handles physical channels (e.g., a physical (PHY) layer). For example, the terminal (110) and the base station (120) may perform at least one of signaling for establishing a connection, signaling for determining settings related to communication, and signaling for indicating allocated resources.

[0082] In step 109, the terminal (110) and the base station (120) transmit and / or receive data. In other words, the terminal (110) and the base station (120) can process, transmit, and / or receive data based on the signaling of the control information. For example, when transmitting data, the terminal (110) or the base station (120) can perform at least one of channel encoding, rate matching, scrambling, constellation mapping, layer mapping, waveform modulation, antenna mapping, and resource mapping on the information bits. Conversely, when receiving data, the terminal (110) or the base station (120) can perform at least one of signal extraction from resources, waveform demodulation for each antenna, signal arrangement considering layer mapping, constellation demapping, descrambling, and channel decoding.

[0083]

[0084] Below, the core technologies of the 6G system are explained.

[0085] As core implementation technologies of the 6G system, technologies such as artificial intelligence (AI), THz (terahertz) communication, optical wireless technology, FSO backhaul network, massive MIMO technology, blockchain, 3D networking, quantum communication, unmanned aerial vehicles, cell-free communication, wireless information and energy transfer (WIET), integration of sensing and communication, integration of access backhaul networks, holographic beamforming, big data analysis, and large intelligent surface (LIS) can be adopted.

[0086]

[0087] Artificial intelligence

[0088] Incorporating AI into communications can streamline and improve real-time data transmission. AI can use numerous analytics to determine how complex target tasks should be performed. This means AI can increase efficiency and reduce processing delays. Time-consuming tasks such as handovers, network selection, and resource scheduling can be performed instantly using AI. AI can also play a crucial role in machine-to-machine (M2M), machine-to-human, and human-to-machine communications. Furthermore, AI can facilitate rapid communication in brain-computer interfaces (BCIs). AI-based communication systems can be supported by metamaterials, intelligent structures, intelligent networks, intelligent devices, intelligent cognitive radios, self-sustaining wireless networks, and machine learning.

[0089] The following describes a functional framework for AI / ML operations.

[0090] Below, to explain AI (or AI / ML) more specifically, the terms can be defined as follows.

[0091] - Data collection: Data collected from network nodes, management entities, or terminals as a basis for AI model training, data analysis, and inference.

[0092] - AI Model: A data-driven algorithm that applies AI technology to generate a set of outputs containing predictive information and / or decision parameters based on a set of inputs.

[0093] - AI / ML Training: An online or offline process of training an AI model by learning features and patterns that best represent the data and obtain a trained AI / ML model for inference.

[0094] - AI / ML Inference: The process of making predictions or inducing decisions based on collected data and the AI ​​model using a trained AI model.

[0095] Life Cycle Management (LCM) procedures for AI / ML models (i.e., model training, model deployment, model inference, model monitoring, model updates, etc.) can be divided into functionality-based LCM and model-based LCM. In functionality-based LCM, AI / ML models may not be identified by the network, and the network can direct the activation / deactivation / fallback / switching of AI / ML functionality. In model-ID (identifier)-based LCM, AI / ML models can be identified by the network, and the network / terminal can activate / deactivate / select / switch AI / ML models based on the model ID.

[0096] Figure 5 illustrates a general functional architecture for an AI / ML model.

[0097] In particular, Figure 5 illustrates a general functional architecture relevant to both Functionality-based LCM and Model-based LCM. Some of the functions or some of the data / information / command flows (i.e., arrows) illustrated in Figure 5 may be omitted.

[0098] Referring to FIG. 5, a general functional framework can be configured to include a data collection function (10), a model training function (20), a management function (30), an inference function (40), and a model storage function (50).

[0099] The Data Collection function (10) is a function that provides input data to the Model Training function (20), Management function (30), and Inference function (40). The Data Collection function (10) can perform data preparation based on raw data and provide input data processed through data preparation. Examples of raw data may include received data / measurement data from terminals or other network entities, inference / output of AI / ML models, etc. The Data Collection function (10) may be performed by a single entity (e.g., terminal, network node, etc.) or may be performed by multiple entities.

[0100] Here, training data (11) refers to data required as input for the AI / ML Model Training function (20). Monitoring data (12) refers to data required as input for the Management (30) of the AI / ML model or AI / ML function. Inference data (13) refers to data required as input for the AI / ML Inference function (30).

[0101] The Model Training function (20) is a function that performs AI / ML model training, validation, and testing, which can generate model performance metrics that can be used as part of the AI / ML model testing procedure. The Model Training function (20) can perform data preparation (e.g., data pre-processing and cleaning, forming, and transformation) based on the Training Data (11) transferred from the Data Collection function (10), if necessary.

[0102] Trained / Updated Model (21): If there is a Model Storage function (50), it is used to pass a trained, validated and tested AI / ML model to the Model Storage function (50) or to pass an updated version of the model to the Model Storage function (50).

[0103] The Management function (30) is a function that supervises the operation of the AI / ML model or AI / ML function. In addition, the Management function (30) may perform decisions to ensure appropriate inference operations based on data received from the Data Collection function (10) (i.e., Monitoring Data (12)) and / or data received from the Inference function (40) (i.e., Inference Output (41)).

[0104] Management Instruction (32) is information required as input to manage the Inference function (40). The relevant information may include selection / (de)activation / switching of an AI / ML model or AI / ML-based function, and may also include fallback to non-AI / ML operations (i.e., not relying on the inference process).

[0105] A Model Transfer / Delivery Request (33) can be used to request model(s) from Model Storage (50).

[0106] A Performance Feedback / Retraining Request (31) refers to information required as input to the Model Training function (20) (e.g., for the purpose of (re)training or updating the model).

[0107] The Inference function (40) is a function that provides output from the process of applying an AI / ML model or AI / ML function using data (i.e., Inference Data (13)) provided by Data Collection (10) as input. Data preparation (e.g., data preprocessing and cleaning, formatting, and transformation) may also be performed based on the Inference Data (13) delivered by Data Collection (10). If necessary, the Inference function (40) may also perform data preparation (e.g., data preprocessing and cleaning, forming, and transformation) based on the Inference Data (13) provided by Data Collection function (10).

[0108] Inference Output (41) is data used in the Management function (30) to monitor the performance of an AI / ML model or AI / ML function. Inference Output (41) may include the inference output of the AI / ML model generated by the Inference function (30), and the details of the inference output may vary depending on the use case.

[0109] The Model Storage function (50) stores a learned / updated model that can be used to perform the Inference function (40). The Model Storage function (50) illustrated in FIG. 5 can be used as a reference point (if any) when applicable to protocol termination, model transmission / delivery, and related processes. Furthermore, the Model Storage function (50) is merely an example and is not intended to limit the storage location of actual AI / ML models, and may be omitted.

[0110] Model Transfer / Delivery (51) is used to transfer AI / ML models to inference functions.

[0111] The level of cooperation can be defined as follows depending on the capability of AI / ML functions between multiple nodes, and variations due to combination of multiple levels or separation of any one level are also possible.

[0112] Cat 0a) No collaboration framework: AI / ML algorithms are purely implementation-based and do not require any changes to the wireless interface.

[0113] Cat 0b) This level corresponds to a framework with a modified wireless interface tailored to efficient implementation-based AI / ML algorithms, but without collaboration.

[0114] Category 1) involves inter-node support to improve the AI / ML algorithms of each node. For example, this applies when a specific node receives support from another node (for training, adaptation, etc.) and vice versa. At this level, model exchange between network nodes is not required.

[0115] Category 2) Joint AI / ML tasks can be performed across multiple nodes. This level requires the exchange of AI / ML model commands or network nodes.

[0116] FIG. 5 is a diagram illustrating an overall functional framework for an AI / ML model, and not all functions and / or all data / information / command signals illustrated in FIG. 5 may be performed within a specific node, but only some of them may be performed.

[0117] AI / ML models can be divided into one-side models and two-side models depending on whether training and / or inference are performed on a single node or jointly / sequentially on multiple nodes.

[0118] A one-side model can refer to an AI / ML model in which inference is performed entirely by a single node (e.g., a terminal or network). Here, AI / ML model training can also be performed entirely by a single node. AI / ML model training and inference can be performed by the same node, or they can be performed by separate nodes.

[0119] A two-side model can refer to an AI / ML model in which joint inference is performed across multiple nodes (e.g., terminals and networks). Joint inference refers to inference being performed jointly across multiple nodes. For example, the first part of the inference may be performed by a first node, and the remaining part by a second node. Two-side models can be categorized into several types depending on the training method of the AI / ML model, as follows:

[0120] - First type: AI / ML models can be trained on a single node. In this case, joint training can be performed. The trained model can then be distributed to other nodes / objects.

[0121] - Second type: Joint training of AI / ML models can be performed on multiple nodes / entities (e.g., networks and terminals). Joint training can mean that model generation (e.g., CSI generation part) and model reconstruction (CSI compression by sub-use case) are trained in the same loop for forward activation and backward gradient. In this type, joint training can include both simultaneous training (i.e., model generation training and model reconstruction training are performed simultaneously) and sequential training (i.e., model reconstruction training is performed after model generation training).

[0122] - Third type: Separate training of AI / ML models can be performed on multiple nodes (e.g., networks and terminals). Separate training may mean that training begins sequentially on one node and continues on other nodes. In this case, the first node first performs the AI / ML model and shares the training data with the second node. The second node can then use the shared training data to perform the AI / ML model. For example, training for the CSI generation part may be performed by the terminal, while CSI reconstruction may be performed by the network.

[0123] Figure 6 illustrates a communication procedure between a first node (e.g., terminal) and a second node (e.g., base station) to which an AI / ML model is applied.

[0124] The operations described in the present invention described below can be described / interpreted based on the AI / ML model as shown in Fig. 6 below, even without separate mention (i.e., without explicit mention of being by / based on / for the AI / ML model). In addition, unless specifically limited in the description of the present invention, the AI / ML model can correspond to a one-side model in which inference is entirely performed by a single node, or a two-side model in which joint inference is performed by multiple nodes.

[0125] Step 1: In the description of the present invention described below, signaling (e.g., information / data / channel / signal, etc.) or a set of signaling between a specific node (e.g., terminal, network, etc.) and another node can be interpreted as the signaling or set of signaling of the first step used to perform an operation based on an AI / ML model, even if there is no separate mention. For example, it can correspond to training data for training (i.e., generation and / or reconstruction) the AI / ML model of FIG. 5, or correspond to inference data used for inference of the AI / ML model, or correspond to feedback for the AI / ML model, etc. If signaling between nodes is not required prior to an operation based on an AI / ML model in the present invention, Step 1 can be omitted. If a one-side model is used in the present invention, the unidirectional / bidirectional signaling (set) in the present invention can correspond to the signaling of the first step. In addition, when a two-side model is used in the present invention, unidirectional / bidirectional signaling in the present invention may correspond to one stage of signaling, and also repetitive signaling operations may correspond to one stage of signaling.

[0126] For example, in AI / ML model-based beam management (BM), if a base station predicts (i.e., infers) beam(s) with good quality based on an AI / ML model, the base station can receive quality / intensity information for multiple beams from a terminal. Furthermore, if a terminal predicts (i.e., infers) beam(s) with good quality based on an AI / ML model, the terminal can receive multiple beams from the base station.

[0127] Step 2: In the description of the present invention described below, an operation (e.g., calculation, selection, prediction, etc.) in a specific node (e.g., terminal, network, etc.) or a joint operation (e.g., calculation, selection, prediction, etc.) in multiple nodes (e.g., terminal, network, etc.) may correspond to a two-step operation based on one or more functions in the functional framework of the AI / ML model, even if not mentioned separately. For example, it may correspond to training (i.e., generation and / or reconstruction) of the AI / ML model in FIG. 5 or inference of the AI / ML model, etc. When a one-side model is used, an operation performed by a single node in the present invention may correspond to a two-step operation, and also, when a two-side model is used, a joint operation performed by multiple nodes in the present invention may correspond to a two-step operation.

[0128] For example, in an AI / ML model-based BM, the base station can use quality / intensity information for multiple beams received from the terminal as inference data to predict (i.e., infer) beam(s) with good quality based on the AI / ML model. Furthermore, the terminal can measure multiple beams received from the base station and use the measurement results as inference data to predict (i.e., infer) beam(s) with good quality based on the AI / ML model.

[0129] Step 3: In the description of the present invention described below, the signaling (e.g., information / data / channel / signal, etc.) or set of signaling between a specific node (e.g., terminal, network, etc.) and another node can be interpreted as a three-stage signaling or set of signaling generated due to (as a result of) an operation based on an AI / ML model, even if not otherwise mentioned. For example, it can correspond to an output due to inference of the AI / ML model in FIG. 5. If signaling between nodes is not required as a result of an operation based on an AI / ML model in the present invention, Step 3 can be omitted. If a one-side model is used in the present invention, the one-way / two-way signaling (set) in the present invention can correspond to the three-stage signaling. In addition, if a two-side model is used in the present invention, the one-way / two-way signaling in the present invention can correspond to the three-stage signaling, and furthermore, a repetitive signaling operation can correspond to the three-stage signaling.

[0130] For example, in an AI / ML model-based BM, the base station can transmit to the terminal the beam(s) predicted based on the AI / ML model as candidates so that the terminal can determine the optimal beam. Furthermore, the terminal can report to the base station the beam(s) predicted based on the AI / ML model to request the base station to transmit the candidate beams as candidates for determining the optimal beam.

[0131]

[0132] <THz 통신(terahertz communication)>

[0133] Data rates can be increased by increasing bandwidth. This can be achieved by utilizing sub-THz communications with wide bandwidths and applying advanced massive MIMO technology. THz waves, also known as sub-millimeter waves, typically refer to the frequency range between 0.1 THz and 10 THz, with corresponding wavelengths ranging from 0.03 mm to 3 mm. The 100 GHz to 300 GHz band (sub-THz band) is considered a key part of the THz spectrum for cellular communications. Adding the sub-THz band to the mmWave band will increase the capacity of 6G cellular communications. Among the defined THz bands, 300 GHz to 3 THz lies in the far infrared (IR) frequency band. While part of the optical band, the 300 GHz to 3 THz band lies at the boundary of the optical band, immediately following the RF band. Therefore, this 300 GHz to 3 THz band exhibits similarities to RF.

[0134] Figure 7 illustrates the electromagnetic spectrum according to one embodiment of the present disclosure. The embodiment of Figure 7 can be combined with various embodiments of the present disclosure. Key characteristics of THz communications include (i) a widely available bandwidth to support very high data rates, and (ii) high path loss at high frequencies (highly directional antennas are essential). The narrow beamwidth generated by the highly directional antenna reduces interference. The small wavelength of THz signals allows for a much larger number of antenna elements to be integrated into devices and base stations operating in this band. This enables the use of advanced adaptive array techniques to overcome range limitations.

[0135] Transmitting system information (i.e., information related to the properties, characteristics, and / or capabilities of a BS required to use a service, such as MIB, SIB, etc.) in the THz frequency band may be inefficient because, as the beam width becomes narrower in high frequency bands, more beam sweeps must be performed to cover the entire area of ​​the cell. In particular, transmitting system information in this manner is even more inefficient when there are not many users in the cell. Accordingly, a system information transmission procedure such as that illustrated in FIG. 8 may be used.

[0136] Figure 8 illustrates an example of a procedure for transmitting system information for THz communications to which the present disclosure applies. While this example was developed with THz in mind, it is also applicable to 6G communication environments where THz is not applicable. Furthermore, the procedure illustrated in Figure 8 can be combined with various embodiments of the present disclosure described below. For example, the embodiments described below can be performed based on system information acquired through the procedure illustrated in Figure 8.

[0137] Referring to FIG. 8, in step 501, the base station (520) transmits system information of cell #1 through cell #2. That is, the base station (520) provides at least two cells, cell #1 uses a THz frequency band, and cell #2 uses a frequency band other than the THz frequency band. Here, the system information may include at least one information / state / parameter / setting generated in each of a higher layer and a physical layer. For example, the at least one information / state / parameter / setting generated in the higher layer may include at least one of SFN, control information setting for SIB1 (e.g., PDCCH configuration for SIB1, etc.), information related to cell selection / entry (e.g., cell barring, cell re-selection, etc.), and subcarrier spacing, and the at least one information / state / parameter / setting generated in the physical layer may include at least one of SFN, half frame indicator, and SSB index. However, this is merely an example, and system information may include information / status / parameters / settings related to Cell #1 / Cell #2 generated from various types of physical layers / upper layers. For this purpose, as an example, Cell #1 and Cell #2 may have a relationship as a secondary cell and a primary cell.

[0138] In step 503, UE (510) acquires synchronization for cell #1. Synchronization can be acquired by detecting a synchronization signal. Typically, synchronization is acquired before receiving system information. However, since system information for cell #1 is received from cell #2, synchronization acquisition for cell #1 can be performed after receiving the system information. For example, UE (510) can acquire synchronization based on system information. However, unlike FIG. 8, in another example, synchronization acquisition can be performed before step 501.

[0139] In step 505, the UE (510) transmits a signal for accessing cell #1. For example, the signal may include information for accessing cell #1 (e.g., a random access preamble, etc.). The structure of the signal and the resources for transmitting the signal (e.g., a channel) may be identified through system information. Thereafter, in step 507, the UE (510) and the base station (520) perform an access procedure for cell #1 and communicate. In this step, operations according to various embodiments described below may be performed.

[0140] The procedure described with reference to FIG. 8 may be performed when the UE (501) first connects to cell #1 of the base station (520). Alternatively, a similar procedure may be performed when the UE (501) hands over to cell #1 of the base station (520). However, in the case of handover, the system information of cell #1 may be received from a cell of a base station other than cell #2 of the base station (520).

[0141] Communications in the THz band are expected to experience extremely severe path loss, and to overcome this, terminals and base stations must use extremely sharp beams. The use of sharp beams means that terminals and base stations must perform beam control in addition to beamforming, and the number of beams used increases significantly. Consequently, it takes a very long time to align the transmit and receive beams between the base station and terminals. Furthermore, if the beam alignment between the base station and terminals is misaligned due to the movement or movement of the terminals, frequent re-alignment of the beams is required, which can lead to link instability. Accordingly, a beam management procedure, as illustrated in FIG. 9 below, may be employed.

[0142] FIG. 9 illustrates a beam management procedure applicable to the present disclosure. FIG. 9 illustrates an example of a procedure for searching and / or selecting beams for THz communication, but is not limited to a THz environment, and the present disclosure is applicable to a 6G communication environment. In addition, the procedure illustrated in FIG. 9 can be combined with various embodiments of the present disclosure described below. Here, a beam may be interpreted as 'spatial (setting) information', 'spatial domain filter', 'spatial domain transmission filter', 'spatial domain reception filter', or / and a term having an equivalent technical meaning that can distinguish the beam (e.g., Reference signal, SSB (Synchronization Signal Block) Index, TRP (transmission reception point), panel, cell, TP (transmission point), base station, control resource related information (e.g., CORESET (control resource set) related information, etc.).

[0143] Referring to FIG. 9, in step 601, the base station (620) configures resources for beam management. Here, the resources may include at least one of time-frequency resources, channels, and spatial resources (e.g., antenna ports). For example, the base station (620) may utilize a beam search signal (BSS) that is transmitted spatially separated from an existing downlink signal / channel for beam search. Here, the BSS may be transmitted based on a dedicated port for beam search. The dedicated port may be a different port from a port for transmitting an existing downlink signal / channel (e.g., a synchronization signal (e.g., SSB, etc.), a data channel (e.g., PDSCH, etc.)). BSS is a term defined for convenience of explanation, and the technical concept according to the present embodiment is not limited to the term BSS itself. That is, a signal transmitted based on a dedicated port defined / configured for beam search may be included in the technical concept according to the present embodiment.

[0144] In step 603, the base station (620) transmits measurement signals using a plurality of transmission beams. For example, the measurement signals may include at least one of a reference signal and a synchronization signal. At this time, the measurement signals may be transmitted as many times as the number of beams that require measurement, and may be transmitted in a multi-beam transmission method that forms a plurality of beams simultaneously to reduce the sweeping time. Here, the multi-beam transmission may be performed based on at least one of a multi-panel, a sub-array, and a true time delay (TTD).

[0145] In step 605, the UE (610) transmits a feedback signal to the base station (620). The feedback signal indicates at least one beam selected by the UE (610). The UE (610) may select at least one preferred beam based on the measurement signals received in step 603. In step 607, the UE (610) and the base station (620) perform communication. At this time, the UE (610) and the base station (620) may perform communication using the beam selected in step 605. If channel reciprocity is established, the transmission beam of the UE (610) may also be determined through steps 603 and 605, and thus, the transmission operation of the UE (610) may also be performed using the beam selected in step 605. If channel reciprocity is not established, a procedure including transmitting measurement signals of the UE (610) and transmitting feedback signals of the base station (620) may be performed to determine the transmission beam of the UE (610). In step 607, operations according to various embodiments described below may be performed.

[0146]

[0147] Non-terrestrial networks (NTN)

[0148] NTN can represent a network or network segment that uses radio frequency (RF) resources mounted on satellites (or unmanned aerial system (UAS) platforms).

[0149] FIG. 10 illustrates an example of a typical NTN scenario based on a transparent payload, according to an embodiment of the present disclosure. FIG. 11 illustrates an example of a typical NTN scenario based on a regenerative payload, according to an embodiment of the present disclosure. The embodiments of FIG. 10 or FIG. 11 may be combined with various embodiments of the present disclosure.

[0150] Referring to FIG. 10, a satellite (or UAS platform) can establish a service link with a UE. The satellite (or UAS platform) can be connected to a gateway via a feeder link. The satellite can be connected to a data network via the gateway. The beam footprint can refer to the area where the signal transmitted by the satellite can be received.

[0151] Referring to FIG. 11, a satellite (or UAS platform) can establish a service link with a UE. A satellite (or UAS platform) connected to a UE can be connected to another satellite (or UAS platform) via an inter-satellite link (ISL). The other satellite (or UAS platform) can be connected to a gateway via a feeder link. Based on the replay payload, a satellite can be connected to a data network through another satellite and the gateway. If an ISL does not exist between a satellite and another satellite, a feeder link between the satellite and the gateway may be required.

[0152] Figures 10 and 11 are only examples of NTN scenarios, and NTN can be implemented based on various scenarios. For example, a satellite (or UAS platform) can implement a transparent or regenerative (with onboard processing) payload. For example, a satellite (or UAS platform) can generate multiple beams over a designated service area depending on the field of view of the satellite (or UAS platform). For example, the field of view of the satellite (or UAS platform) can vary depending on the onboard antenna diagram and minimum elevation angle. For example, a transparent payload can include radio frequency filtering, frequency conversion, and amplification. Therefore, the waveform signal repeated by the payload may not be changed. For example, a regenerative payload can include radio frequency filtering, frequency conversion and amplification, demodulation / decoding, switching and / or routing, and coding / modulation. For example, a regenerative payload could be substantially equivalent to carrying all or part of the base station functionality on a satellite (or UAS platform).

[0153]

[0154] Integrated Sensing and Communication (ISAC)

[0155] Wireless sensing is a technology that uses radio frequencies to determine the instantaneous linear velocity, angle, distance (range), etc. of an object, thereby obtaining information about the characteristics of the environment and / or objects within the environment. Because radio frequency sensing does not require a networked device to connect to the object, it can provide a service for object positioning without a device. The ability to obtain range, velocity, and angle information from radio frequency signals can enable a wide range of new capabilities, such as various object detection, object recognition (e.g., vehicles, humans, animals, UAVs), and high-precision localization, tracking, and activity recognition. Wireless sensing services can provide information to a variety of industries (e.g., drones, smart homes, V2X, factories, railways, public safety, etc.), enabling applications such as intruder detection, assisted vehicle steering and navigation, trajectory tracking, collision avoidance, traffic management, and health and traffic management. In some cases, wireless sensing can utilize non-3GPP type sensors (e.g., radar, cameras) to further support 3GPP-based sensing. For example, the operation of wireless sensing services, i.e., sensing operations, may depend on the transmission, reflection, and scattering of wireless sensing signals. Therefore, wireless sensing offers an opportunity to enhance existing communication systems from a communication network to a wireless communication and sensing network.

[0156] FIG. 12 illustrates an example of a sensing operation according to an embodiment of the present disclosure. The embodiment of FIG. 12 can be combined with various embodiments of the present disclosure. Specifically, FIG. 12(a) illustrates an example of sensing using a sensing receiver and a sensing transmitter located at the same location (e.g., monostatic sensing), and FIG. 12(b) illustrates an example of sensing using a separated sensing receiver and sensing transmitter (e.g., bistatic sensing).

[0157] For example, in a wireless communication system based on a 6G network of the present specification, referring to FIG. 12(a), the sensing transmitter and the sensing receiver may be configured to be included in a single base station (i.e., the same base station) or a single terminal (i.e., the same terminal). Alternatively, referring to FIG. 12(b), the sensing transmitter and the sensing receiver may be configured to be included in different base stations, different terminals, or each terminal and base station.

[0158] In this regard, the following six types of sensing modes can be defined based on whether the sensing transmitter and sensing receiver are included in the base station or the terminal, respectively.

[0159] - Mode 1: A mode in which the sensing transmitter and sensing receiver are contained in a single base station (e.g., base station-based sensing mode in monostatic mode).

[0160] - Second mode: A mode in which the sensing transmitter is included in a first base station and the sensing receiver is included in a second base station different from the first base station (e.g., base station-based sensing mode in bistatic mode).

[0161] - Mode 3: A mode in which the sensing transmitter is included in the base station and the sensing receiver is included in the terminal (e.g., base station-terminal sensing mode).

[0162] - Mode 4: A mode in which the sensing transmitter is included in the terminal and the sensing receiver is included in the base station (e.g., terminal-base station sensing mode).

[0163] - Mode 5: A mode in which the sensing transmitter and sensing receiver are contained in a single terminal (e.g., terminal-based sensing mode in monostatic mode).

[0164] - 6th mode: A mode in which the sensing transmitter is included in a first terminal and the sensing receiver is included in a second terminal different from the first terminal (e.g., terminal-based sensing mode in bistatic mode).

[0165] In a wireless communication system based on a 6G network of the present specification, one or more of the six types of sensing modes described above may be utilized independently / in combination.

[0166] In relation to the sensing operation in FIG. 12, the sensing transmitter may transmit a sensing signal for sensing one or more objects (and / or an environment around the objects). For example, the sensing signal may correspond to a radio (frequency) signal defined to be transmittable by a base station / terminal in a wireless communication system based on a 6G network of the present specification. The sensing receiver may receive a signal scattered / reflected by one or more objects (and / or an environment around the objects) from a sensing signal transmitted from the sensing transmitter. In the sensing receiver, sensing data may be derived from the scattered / reflected signals, and sensing results may be generated / obtained through processing of the sensing data. Here, the sensing results may include characteristic information (e.g., location, distance, speed, angle, etc.) about one or more objects (and / or the environment around the objects). The sensing results generated / obtained in this way may be utilized for wireless sensing services (e.g., detection, tracking, etc. of objects and / or environments) provided in the wireless communication system based on the 6G network of the present specification, or may be provided / disclosed to a trusted third party.

[0167] Additionally, the sensing operation in FIG. 12 is described as a representative example of the operation in a wireless communication system based on a 6G network, but can be extended and applied to cases where terminals / base stations / signals based on networks of previous generations (e.g., 4G, 5G, etc.) are utilized.

[0168] Additionally, with respect to the wireless sensing described herein, in a wireless communication system based on a 6G network of the present specification, time / frequency resources for sensing operations and time / frequency resources for general communications (e.g., UL / DL / sidelink-based communications, etc.) may be scheduled / configured separately.

[0169] FIG. 13 illustrates time / frequency resources for sensing operations according to one embodiment of the present disclosure. The embodiment of FIG. 13 may be combined with various embodiments of the present disclosure.

[0170] Referring to FIG. 13, time / frequency resources (hereinafter, sensing resources) for the aforementioned sensing operation (e.g., sensing operation based on FIG. 10) can be set / allocated separately from time / frequency resources (hereinafter, communication resources) for general communication.

[0171] For example, as illustrated in FIG. 13, sensing resources can be set / allocated in units of symbols in the time domain and / or resource blocks in the frequency domain. Resources other than those for which the sensing resources are set / allocated can be utilized as resources for general communication. That is, sensing resources and communication resources can be set / allocated based on a time-division multiplexing (TDM) scheme and / or a frequency-division multiplexing (FDM) scheme in terms of the operation of the base station / terminal. Additionally or alternatively, unlike what is illustrated in FIG. 12, sensing resources can also be set / allocated based on other units in the time domain (e.g., slots, frames, absolute time (ms, us), etc.) and / or other units in the frequency domain (e.g., subcarriers, carriers, absolute frequencies (MHz, GHz), etc.).

[0172] Additionally or alternatively, in connection with the setting / allocation / scheduling of resources for general communication as described herein, the relationship between the resources and the aforementioned sensing resources may need to be considered. For example, when setting / allocating resources for general communication according to the embodiment(s) of the present disclosure, the resources may be set / allocated to rate-match or puncture the resource region corresponding to the sensing resource. For example, when scheduling resources for general communication according to the embodiment(s) of the present disclosure, the resources may be scheduled so as not to overlap with the resource region corresponding to the sensing resource. If the resources for general communication according to the embodiment(s) of the present disclosure and the resource region corresponding to the sensing resource are set / allocated / scheduled to overlap, one or both operations may be dropped, skipped, or postponed based on priorities, predefined rules, etc. That is, in the embodiment(s) of the present specification, it may be desirable that resources related to general communication (e.g., resources for signals / channels related to UL / DL / Sidelink-based data / control, etc.) are set / allocated / scheduled so as not to overlap with the sensing resources described above.

[0173] Additionally, various channel modeling methods may be applied in connection with the wireless sensing described herein. Channel modeling related to sensing may refer to configuring a path for transmitting and receiving sensing signals and / or scattered / reflected signals, taking into account the object being sensed and / or the environment in which the object resides. Channel modeling may be related to the performance / requirements of sensing in wireless communication systems, and thus may be an important factor in validating the sensing function.

[0174] Channels related to sensing can be divided into channels between objects (e.g., targets of interest) and sensing transmitters / receivers, and channels between the environment to which the object belongs and sensing transmitters / receivers. In this regard, channel modeling related to sensing can be divided based on sensing mode (e.g., the six types of modes described above), whether there is an object / environment, and / or sensing scenarios. For example, channel modeling for a target in a base station / terminal-based monostatic sensing mode, channel modeling for a target in a base station / terminal-based bistatic sensing mode, channel modeling for the environment in a base station / terminal-based monostatic sensing mode, and channel modeling for the environment in a base station / terminal-based bistatic sensing mode can be configured and optimized differently. For example, when various sensing scenarios are classified, channel modeling for detection, location, and tracking scenarios, channel modeling for motion recognition, and channel modeling for imaging / environment reconstruction scenarios can be divided, etc. Additionally, channel modeling related to sensing may be based on statistical channel modeling techniques and / or deterministic channel modeling techniques. For example, modeling for sensing in a wireless communication system based on a 6G network of the present disclosure may be based on stochastic geometric channel modeling techniques and / or hybrid with ray tracing channel modeling techniques. Here, the stochastic geometric channel model may be based on various statistical characteristics of the channel state. Furthermore, the hybrid channel model may be based on both ray tracing techniques and stochastic techniques.In a hybrid approach, channels for objects requiring high accuracy and consistency (e.g., targets of interest) can be modeled using ray tracing techniques, while channels for the environment can be modeled using probabilistic techniques.

[0175] FIG. 14 illustrates a procedure related to a sensing operation according to one embodiment of the present disclosure. The embodiment of FIG. 14 may be combined with various embodiments of the present disclosure.

[0176] For example, in a wireless communication system based on a 6G network of the present specification, in the case of a sensing operation in which a terminal participates, the base station may need to verify the capability of the terminal for the sensing operation. In this regard, the terminal may be configured to report capability information on whether it supports the sensing operation to the base station. Additionally or alternatively, if the terminal is defined in advance in the standard as supporting the sensing operation, the procedure may be omitted. In addition, in the case of a sensing operation in which only the base station participates, the base station may be configured to report capability information on whether it supports the sensing operation to an entity that configures / controls its sensing operation (e.g., a network entity at an upper level / layer of the base station).

[0177] For example, the base station can perform signaling with the terminal to exchange configuration information related to the sensing operation. For example, the base station can configure / instruct the terminal information about the mode of the sensing operation (e.g., based on the six types of modes described above), the subject of the sensing operation (e.g., sensing transmitter, sensing receiver), the resource of the sensing operation (e.g., sensing resource as in FIG. 13), the target of utilizing the sensing result (e.g., type of wireless sensing service based on 6G network, trusted third party), channel modeling for sensing (e.g., channel between the base station / terminal and object / environment), etc. For example, the base station can also configure / instruct such information from a network entity at an upper level / layer of the base station.

[0178] For example, the base station and / or the terminal may perform a sensing operation based on the set / instructed information. For example, the base station and / or the terminal may, as a sensing transmitter and / or a sensing receiver, perform procedures such as transmitting the aforementioned sensing signal, receiving scattered / reflected signals, deriving sensing data, obtaining sensing results through processing the sensing data, and providing the sensing results. For example, in the operations of the base station / terminal described herein, the sensing results provided through the sensing operation may be utilized.

[0179]

[0180] <LP-WUS (low-power Wake-up Signal)과 LP-WUR (Low-Power Wake-up Receiver)>

[0181] 3GPP standard release 19 supports LP-WUS (low-power Wake-up Signal) and LP-WUR (Low-Power Wake-up Receiver) to reduce power consumption of terminals, and is discussing the development of technologies utilizing these.

[0182] In the present disclosure, the MR (Main Radio) receiver refers to a receiver for receiving signals according to the general 3GPP NR standard, and can be utilized to receive OFDM signals, etc., according to the NR standard. In other words, a receiver currently configured in a standard terminal can be understood as an MR (Main Radio) receiver. LP-WUR refers to a receiver that can be newly configured in a terminal to receive a low-power signal, and can receive newly designed low-power signals such as LP-WUS (Low-Power Wake-up Signal) or LP-SS (Low-Power Synchronization Signal), and can generally have the characteristics of being configured with low cost and low power consumption.

[0183] In this disclosure, it is assumed that the UE has both an MR (Main Radio) receiver and an LP-WUR. In particular, in this disclosure, the MR receiver may be abbreviated as MR, and the LP-WUR may be abbreviated as LR.

[0184] Low-power signals such as LP-WUS or LP-SS can be transmitted differently from signals transmitted with the current general OFDM symbol structure in the resource configuration of the time / frequency axis in the NR standard. For example, LP-WUS is modulated with OOK (On-Off Keying) to match the slot or symbol structure of the time axis, but can be transmitted in a way that does not match the RE (Resource Element) structure of the frequency axis. That is, since LP-WUS is represented as 1 if there is a signal within a specific time interval, and 0 if there is no signal, the terminal can receive the signal simply by detecting energy within a specific time interval. It can also be considered that the OOK symbol of LP-WUS is overlaid with a sequence for spectrum flattening, or an OFDM sequence for increasing transmission coverage or transmitting additional information. In particular, overlaying of OFDM sequences can be implemented by multiplying the waveform of the sequence by the ON region of the ON-OFF KEYING symbol.

[0185] In general, PDCCH monitoring accounts for a large portion of the power consumption of a terminal in RRC_CONNECTED mode (hereinafter referred to as CONNECTED mode). Since the terminal monitors the PDCCH using the MR, the longer the sleep time of the MR, the more effective it can be in saving power of the terminal. In the past, in order to save power of the terminal, the DRX operation in which the terminal performs PDCCH monitoring at regular intervals, the Wake-Up Signal (WUS) that can indicate whether to perform PDCCH monitoring at the corresponding interval, and the adaptation operation that can adjust the PDCCH monitoring frequency within the DRX active time were introduced. All of these operations were introduced for the purpose of reducing the time for the terminal to monitor the PDCCH and ensuring a sleep time in which the MR does not operate, thereby reducing the power consumption of the terminal.

[0186] We can consider reducing the frequency of PDCCH monitoring performed by the MR of the terminal by utilizing the newly introduced LP-WUS / LP-WUR. The LP-WUR of the terminal operates at relatively low power and consumes less power than the MR. Therefore, the terminal in CONNECTED mode can reduce power consumption by operating the MR in a sleep state and not performing PDCCH monitoring, and if the LR that operates at low power can receive the LP-WUS and utilize it to wake up the MR, it can be expected to be effective in saving power of the terminal. This can be effective because the terminal can maintain a long sleep time with low power consumption of the MR. In addition, we can consider receiving other instructions through LP-WUS, such as an operation to temporarily switch the MR to a sleep state, and operating the MR accordingly.

[0187] LP-WUS may include a payload transmitted in the OOK format described above. Generally, the payload can be said to contain information actually indicated to the terminal. Additionally, it may consist of a preamble for other purposes (e.g., synchronization acquisition) and an OFDM sequence overlaid on the OOK symbol. In other words, LP-WUS can be said to include information transmitted via the payload and information transmitted via the overlaid OFDM sequence.

[0188] LP-WUR can be defined by dividing it into two types.

[0189] (1) LP-WUR Type #1: WUR capable of energy detection only

[0190] (2) LP-WUR Type #2: WUR capable of sequence detection

[0191] LP-WUR Type #1 focuses on low cost and is a WUR capable of only energy detection, i.e., determining the presence or absence of a signal. Therefore, it is a receiver capable of receiving only OOK symbols, i.e., information transmitted through the payload.

[0192] LP-WUR Type #2 is a higher-cost WUR than Type #1, capable of detecting OFDM sequences and energy detection. Therefore, it is a receiver capable of receiving not only the payload but also information transmitted via overlaid OFDM sequences. Furthermore, it can also receive the PSS / SSS of existing NR signals.

[0193] When a terminal in CONNECTED mode receives an LP-WUS, the information it can receive varies depending on the terminal's LP-WUR type, and the corresponding actions may be defined differently. Considering these different types of LP-WUR, the information indicated through the LP-WUS and the actions of the terminal receiving it are required.

[0194] In this disclosure, a terminal in CONNECTED mode receives LP-WUS and proposes subsequent operations.

[0195] Terminals capable of supporting the reception of LP-WUS, i.e., terminals equipped with LR, need to have their existing CONNECTED mode operations set / introduced differently by receiving LP-WUS. In other words, the existing CONNECTED mode operations can be further improved with the assistance of LP-WUS. For example, terminal operations such as receiving a signal with MR and receiving auxiliary instructions through LP-WUS received with LR, thereby changing the operation of MR can be proposed. These terminal operations and the indicated LP-WUS are proposed by considering both types of LP-WUR.

[0196] In the prior art (i.e., 3GPP NR standard Release 15 to Release 17), DRX is set to perform periodic PDCCH monitoring to reduce power consumption of a terminal in CONNECTED mode, and operations are introduced in which one cycle of DRX active time can be skipped through a wake-up indication of DRX and how CSI reporting and SRS transmission should be performed accordingly can be set, and PDCCH monitoring can be stopped or the number of times can be adjusted for a certain period of time within the DRX active time.

[0197] The UE's PDCCH monitoring (or CSI reporting and SRS transmission) operation can be performed by the MR, and this can be referred to as the active state of the MR. The sleep state (sleep state) of the MR of the UE can refer to a state in which PDCCH monitoring is not performed, which is not an active state. In general, reducing the active time of the MR can be an important factor in reducing the power consumption of the UE. If the UE can receive a separate signal called LP-WUS with very low or almost no power consumption by utilizing the LR, it can receive an instruction to adjust the PDCCH monitoring (or CSI reporting and SRS transmission) through this. Through this, the power saving effect can be expected by extending the time in which the UE does not perform PDCCH monitoring (or CSI reporting and SRS transmission).

[0198] Hereinafter, the present disclosure describes a proposed method based on the case where DRX, which is an operation for periodic reception of a terminal, is set or not set. However, the methods proposed in the present disclosure are not limited thereto, and it will be understood by those skilled in the art that they can be extended and applied to all signals that a terminal receives with a certain periodicity. Therefore, it is clear that the methods proposed in the present disclosure can be applied to all types of transmission and reception methods expected by a base station and a terminal without a separate description, as long as the principles of the invention are not violated. Even if only one of the power off state or the sleep state is described in the present disclosure below, the two states can be similar in that the MR does not receive a signal and a certain transition time is required.

[0199] Hereinafter, in order to explain the principles of the invention, the present disclosure provides examples based on the NR system, but the proposed methods are not specifically limited to the transmission and reception form of NR unless otherwise described. In addition, the present disclosure provides examples based on the characteristics and structure of the DRX terminal in order to explain the principles of the invention, but the proposed methods are not specifically limited to the support of the DRX terminal unless otherwise described. In other words, it is applicable to an operation based on the DRX of NR or a separately configured DRX proposed in the present disclosure. Therefore, it is obvious that the methods proposed in the present disclosure can be applied to all wireless communication transmission and reception structures and services as long as the principles of the invention are not violated even without a separate description.

[0200] The distinction between each method or option in the following description is intended to clarify the explanation and is not to be construed as necessarily implying that each method or option must be implemented as an independent invention. For example, the methods / options described below may be implemented individually, but at least some of them may be implemented in combination, provided they do not conflict with each other.

[0201] The overlaid OFDM sequence described below is exemplified by multiplying the waveform of the sequence by the ON region of an on-off keying (OOK) symbol.

[0202]

[0203] <LP-WUR 타입에 따른 LP-WUS의 구성>

[0204] As described above, LP-WUR can be divided into two types: Type #1 and Type #2. Even if terminals with different types of LP-WUR receive the same LP-WUS, the amount of information received may vary depending on whether sequence detection is possible. Therefore, the composition of information / instructions within the LP-WUS that can be transmitted to terminals in CONNECTED mode can be divided into payload and sequence, and can be set to vary depending on which type of LP-WUR the terminal has.

[0205] (1) Information transmitted via LP-WUS that can be received by a terminal in CONNECTED mode

[0206] A terminal in CONNECTED mode can receive a wake-up indication indicating the start of the DRX active time through LP-WUS. This is because LP-WUS performs the role of DCI format 2_6 in the existing 3GPP NR standard release 16, and information such as SCell dormancy indication in addition to the wake-up indication included in DCI format 2_6 can also be included in LP-WUS. In addition, it can be used to indicate a DRX active time that starts only by LP-WUS reception for a terminal for which periodic DRX is not configured, or to indicate a DRX active time that starts by LP-WUS reception in a section for which periodic DRX is configured but DRX active time cannot be expected.

[0207] During the PDCCH skipping duration within the DRX active time, the LP-WUS may be received to stop PDCCH skipping and restart PDCCH monitoring. Since the MR of the UE is in a micro-sleep state with a transition time of 0, if the UE is instructed to resume PDCCH monitoring by receiving the LP-WUS, the operation can be performed without delay. Alternatively, in order to ensure a minimum UE processing time for decoding the LP-WUS information, the UE operation can be configured to resume PDCCH monitoring from the first symbol of the slot immediately following the slot in which the LP-WUS is received. The UE may perform an operation of stopping PDCCH monitoring for a certain period by receiving a PDCCH skipping instruction through scheduling DCI within the DRX active time. During this period, the terminal maintains the MR in a sleep state and does not monitor the PDCCH, but can continue to monitor the LP-WUS with the LP-WUR, and can immediately stop the PDCCH skipping operation that was being performed upon receiving the LP-WUS. In addition, when such an operation is instructed through the LP-WUS, it may also consider receiving an instruction regarding the SS (Search Space) set(s) or SS set group(s) that perform PDCCH monitoring again. These SS set(s) or SS set group(s) may be set only for cases performed by the instruction of the LP-WUS, or it may be considered to utilize the same setting used for the existing SS set group switching purpose.

[0208] Receiving instructions for multiple cells via LP-WUS may also be considered. When a terminal in CONNECTED mode operates for multiple cells, PDCCH monitoring instructions for the multiple cells may be received via LP-WUS. For example, if the MR of the terminal operates in multiple cells and the LP-WUR operates in a separate cell, it may be considered that the received LP-WUS instructs the terminal to monitor PDCCH in multiple different cells (e.g., to start a DRX active time or to resume PDCCH monitoring that was stopped).

[0209] (2) Transmitting information distinguished through overlaid OFDM sequences

[0210] The operations instructed to the terminal in the above CONNECTED mode can be transmitted through the payload and sequence within the LP-WUS. As described above, the LP-WUS can always receive the payload depending on the LP-WUR type, but the sequence may not be received. Therefore, even if the terminal in the CONNECTED mode is instructed to perform a specific operation through the LP-WUS, the information that the terminal can actually receive may vary depending on whether the sequence can be received, i.e., depending on the LP-WUR type. Therefore, the above terminal operation instructions may need to be included separately as the payload and sequence within the LP-WUS.

[0211] Regardless of the LP-WUR type, the terminal can always receive the payload transmitted via the OOK symbol. Therefore, the payload may include instructions / information that are common or essential to the terminal. This may include information that must always be transmitted regardless of whether the terminal is LP-WUR type #1 or #2. Conversely, the sequence may include additional instructions that are not essential to the terminal's operation.

[0212] Therefore, the terminal can receive LP-WUS and perform the indicated operation regardless of the LP-WUR type.

[0213] Terminals of LP-WUR Type #1 perform actions based solely on instructions contained in the payload, and may ignore overlaid sequences. Such actions based on instructions contained in the payload of LP-WUS can be defined as the default actions of terminals upon receiving LP-WUS.

[0214] On the other hand, if the terminal is LP-WUR type #2, it can receive additional information based on the information of the overlaid sequence, or it can be instructed to perform additional operations other than the basic operations. In other words, the terminal of LP-WUR type #2 can receive information related to essential operations through the payload, and receive additional information or instructions related to the operation through the overlaid sequence, and perform the operation accordingly. For example, if the terminal of LP-WUR type #2 receives LP-WUS and receives all information included in the payload and the sequence, it can instruct additional information or differences from the default operation through the overlaid sequence based on the default operation instructed through the payload. Even if it receives the same LP-WUS, the terminal of LP-WUR type #1 performs the default operation, and the terminal of LP-WUR type #2 performs an operation in which detailed settings compared to the default operation are instructed.

[0215] Therefore, it is possible to distinguish between information transmitted through payload and sequence so that the operation indicated through LP-WUS can always be performed regardless of the LP-WUR type of the terminal.

[0216] (3) Examples of information that can be transmitted via overlaid OFDM sequences

[0217] Information that may be transmitted via the overlaid OFDM sequence may include at least one of the following a) to e):

[0218] a) Same information as the payload of LP-WUS

[0219] The same information can be transmitted in the payload of LP-WUR and the overlaid sequence. Since it is the same information, a terminal of LP-WUR type #1 can receive the payload of the OOK symbol with energy detection, and a terminal of LP-WUR type #2 can receive the ODFM sequence with sequence detection. If a situation occurs where detection is not smooth, a terminal of LP-WUR type #2 can further improve reception performance by performing energy detection on the payload. Alternatively, for a terminal in CONNECTED mode, in the case of LP-WUR type #2, whether or not to perform energy detection can be set in advance and instructed.

[0220] b) Some of the information that can be transmitted via DCI format 2_6 (e.g. SCell dormancy indication)

[0221] For DRX with a set period of time in the terminal, DCI format 2_6 can be received first before the time when the start of the DRX active time can be expected to begin to indicate whether or not to start DRX. At this time, DCI format 2_6 includes information that can indicate SCell dormancy in addition to the wake-up indication for the DRX of the terminal. The wake-up indication information can be included in the payload of LP-WUS, and the SCell dormancy indication information can be included in the sequence. In this case, since the terminal of LP-WUR type #1 cannot receive information about the SCell dormancy indication, if it wakes up and starts DRX based on the wake-up indication, it can be understood that the default operation is that all SCells also wake up and operate. Since the terminal of LP-WUR type #2 can receive indications about SCells, it can perform operation by distinguishing them by SCell based on this.

[0222] c) Specify DRX related values ​​as different values

[0223] The terminal can set the cycle, timer, etc. of CONNECTED mode DRX performed through upper layer parameters, etc. In the case of a terminal of LP-WUR type #1, the DRX operation of the preset cycle and timer can be instructed to be performed. In other words, values ​​related to DRX can be set semi-statically through upper layer parameters, and operations based on the preset values ​​can be performed through LP-WUS reception.

[0224] For terminals of LP-WUR type #2, additional information can be transmitted through an overlaid sequence. For example, additional values ​​other than default cycles, timers, etc. can be set through upper layer parameters. In this case, the terminal can receive LP-WUS to receive instructions regarding terminal operation through the payload, and can receive information related to additional settings through the overlaid sequence. Through the overlaid sequence, values ​​such as cycles and timers related to DRX can be instructed to operate with values ​​other than the default values. In other words, the terminal can be dynamically instructed to perform DRX operation with changed settings through the overlaid sequence.

[0225] Alternatively, through an overlaid sequence, only specific values ​​from the default settings can be instructed to change. For example, only a specific timer among the DRX timers set in the terminal, such as drx-inactivityTimer, can be instructed to operate with a changed value rather than the default value.

[0226] These instructions may be instructions for short DRX and long DRX. If both short DRX and long DRX are configured, the terminal may start short DRX depending on whether PDCCH is detected during long DRX operation. It may also be considered to explicitly indicate the transition between short DRX and long DRX through an overlaid sequence.

[0227] d) Detailed instructions regarding terminal operation to initiate non-periodic DRX

[0228] Even when DRX starts depending on LP-WUS reception without a preset periodic DRX for the terminal, detailed instructions related to this can be instructed through an overlayed sequence. The terminal can be configured for DRX that starts depending on LP-WUS reception through upper layer parameters. Timers including drx-onDurationTimer and drx-inactivityTimer are set when the terminal receives LP-WUS and starts DRX, and the terminal receives LP-WUS and operates based on these settings. A terminal of LP-WUR type #2 capable of receiving an overlayed sequence can be instructed to perform an operation of a changed setting based on a default setting, or to perform an operation based on non-default values ​​among several preset values.

[0229] Also, in case of non-periodic DRX, multiple drx-onDurationTimers can be instructed to be started at regular time intervals after receiving LP-WUS. For example, a terminal of LP-WUR type #1 can receive LP-WUS, start drx-onDurationTimer, and start drx-onDurationTimer again at regular time intervals after all DRX active times have expired, and this operation can be repeated N times (where N is a default value and is semi-statically set through a higher layer parameter). At this time, a terminal of LP-WUR type #2 can be instructed to change a value through an overlaid sequence N times, and can also be instructed to change a timer value or time interval, etc.

[0230] When the above instructions are received via an overlaid sequence of LP-WUS, ACK information indicating that the instructions have been fully received may be required. The terminal needs to notify the base station that it has fully received the instructions and performed a non-default action, and this information can be included in the ACK information for the scheduled PDSCH and transmitted together.

[0231] e) PDCCH monitoring adaptation instruction

[0232] It may also be considered that information related to PDCCH monitoring adaptation is indicated via an overlaid sequence. Regarding PDCCH monitoring, the UE configures skipping intervals and SS set groups as upper layer parameters. This can be indicated via an overlaid sequence of LP-WUS. For example, when the UE starts the DRX active time through LP-WUS reception, it can indicate the SS sets that monitor the PDCCH in the form of an SS set group. Furthermore, when the UE stops the PDCCH skipping interval and resumes PDCCH monitoring, it can indicate in the form of an SS set group which SS set it will perform the operation.

[0233] Additionally, additional settings other than the default settings can be specified via upper-layer parameters. In this case, the terminal can be instructed to operate during the DRX active time based on skipping intervals of different values ​​or SS set groups of different configurations via overlaid sequences.

[0234] If the overlaid sequence information and the payload information are transmitted differently and the terminal fails to receive the payload, the overlaid sequence information may not be used. If different information is transmitted, the overlaid sequence information may indicate auxiliary information for the default operation indicated by the payload information, so the overlaid sequence information may be ignored if the payload is not fully received.

[0235]

[0236] <LP-WUS의 대상 단말 범위 및 전송>

[0237] The transmission of CONNECTED mode LP-WUS and the corresponding target terminal classification can be proposed in various ways. CONNECTED mode LP-WUS can be transmitted to a specific terminal (UE-specific) or to a group including multiple terminals (group common).

[0238] When a CONNECTED mode LP-WUS is UE-specific, the target terminal of the LP-WUS can be identified by resources on the time / frequency axis. For example, a specific frequency range and a specific periodic time range in which the LP-WUS can be transmitted can be set, so that the terminal can recognize that the target of the LP-WUS received in that area is a specific terminal.

[0239] The time / frequency resource allocation can be for a group of terminals rather than for each individual terminal. Time / frequency resources can be allocated for each terminal group, and terminals within that group can later identify that the resource is for a specific terminal after attempting to receive an LP-WUS. This can be advantageous for efficiently utilizing time / frequency resources, as many terminals within a cell can receive LP-WUS.

[0240] Depending on the maximum amount of information that can be included in the payload and sequence, a distinction can be made / indicated as to whether the LP-WUS is terminal specific or group common.

[0241] When LP-WUS is transmitted to a group of terminals, it may include information for distinguishing each terminal within the group, and a structure that instructs only essential terminal operations through the payload within the LP-WUS and instructs additional operations through an overlaid sequence may be advantageous.

[0242] Meanwhile, since it is LP-WUS targeting terminals in CONNECTED mode, the transmission method may be different. For example, rather than transmitting information by distinguishing the presence or absence of a signal in the payload (e.g., OOK (on-off keying)), it may always modulate in a signal presence state (i.e., On state) and transmit information through an overlaid OFDM sequence. Since the payload of LP-WUS is transmitted only in a signal presence state (i.e., On state, represented by 1), the payload may be an instruction to perform PDCCH monitoring (e.g., an instruction to start DRX active time or an instruction to end PDCCH skipping operation), and other instructions may be based on the overlaid sequence.

[0243] Alternatively, the terminals of LP-WUR type #2 can be divided into groups and the corresponding instruction can be transmitted. Since it targets terminals in CONNECTED mode, the base station can inform the LP-WUR type of the terminal, and since the RRC connection is established, the base station can differentiate and set it. The terminal can receive information by performing only sequence detection using LP-WUR type #2 and perform the indicated operation. If Manchester encoding is applied to OOK (on-off keying), the amount of information is reduced by half, but the same method can be operated. Only terminals of LP-WUR type #2 can be configured to receive LP-WUS within the DRX active time. In this case, the sequence can be transmitted on all 1 symbols. In addition, if Manchester encoding is performed, the symbol represented by 1 can be encoded to be longer than the symbol represented by 0.

[0244] The terminal operation can be distinguished depending on whether LP-WUS is received within or outside the DRX active time. For example, if the payload is modulated with OOK, LP-WUS can be recognized as being received outside the DRX active time, and if the payload is modulated with all 1 symbols and information is transmitted using only sequences, LP-WUS can be recognized as being received within the DRX active time.

[0245] Alternatively, terminal operation may be distinguished based on information contained in the received LP-WUS, depending on whether the MR is operating at the time the terminal receives the LP-WUS.

[0246] If a CONNECTED mode LP-WUS overlaps with an IDLE / INACTIVE mode LP-WUS transmission, the IDLE / INACTIVE mode LP-WUS transmission may take precedence. Since a CONNECTED mode terminal can be aware of the transmission occasion, if a transmission occasion of a CONNECTED mode LP-WUS that the terminal can expect overlaps with a transmission occasion of an IDLE / INACTIVE mode LP-WUS transmission, the terminal does not monitor the transmission occasion. Alternatively, a CONNECTED mode terminal does not expect to receive a CONNECTED mode LP-WUS transmission occasion that overlaps with an IDLE / INACTIVE mode LP-WUS transmission occasion.

[0247]

[0248] <LP-WUS containing instructions for multiple cells>

[0249] A terminal in CONNECTED mode can operate across multiple cells. It operates with a single PCell (Primary Cell) and multiple SCells (Secondary Cells), and LP-WUS can be received from the PCell or from a separate cell. A terminal operating across multiple cells can receive various instructions for these cells via LP-WUS.

[0250] If the PCell does not support LP-WUS or the time / frequency resources for LP-WUS are deemed insufficient, the UE may consider receiving LP-WUS through the SCell instead of the PCell. To facilitate the reception of LP-WUS and the indication thereof, the transmission cycle of LP-WUS (and LP-SS) may be set frequently in a specific cell, and the LP-WUR of the UEs in CONNECTED mode that support LP-WUS may operate to receive in that cell as the SCell.

[0251] Instructions for multiple cells can be transmitted via LP-WUS. When a terminal operates for multiple cells, the instructions that can be included in the above-described LP-WUS can be set / applied to each of the multiple cells, and these instructions can be transmitted via the payload and sequence of the LP-WUS.

[0252] Additionally, PDCCH monitoring adaptation instructions for different cells can be supported via LP-WUS. PDCCH monitoring adaptation instructions in 3GPP NR standard Release 17 can only be indicated for the cell being scheduled via scheduling DCI. When such instructions are received via LP-WUS, they can be configured to allow instructions for different cells. As in the example above, LP-WUS can be received only in a specific cell, and PDCCH monitoring adaptation instructions for multiple other cells can be enabled through this.

[0253] For example, if a wake-up indication to start DRX active time for multiple cells is indicated through LP-WUS, it can be indicated separately for each cell configured in the terminal. The terminal can perform operations only for specific cells through LP-WUS. The payload of LP-WUS includes a wake-up indication differentiated for each cell, and the overlaid sequence can include detailed information indicated for each cell.

[0254] When transmitting instructions for multiple cells through a single LP-WUS, the included information can be distinguished in the form of a bitmap. For example, wake-up can be indicated for each cell by distinguishing each bit, or each can be indicated for PDCCH monitoring adaptation in the form of a bitmap of 2 bits. If the UE operates for one PCell and 3 SCells, a total of 12 bits (i.e., (1+3) cells * (1 bit for wake-up instruction + 2 bits for PDCCH monitoring adaptation instruction)) LP-WUS can be configured to transmit detailed instructions for each cell. If the payload of the LP-WUS is less than 12 bits, instructions for several SCells can be transmitted through an overlaid sequence.

[0255] LP-WUS instructions for multiple cells may be applied to some cells or groups of cells, not all cells. The cells targeted by LP-WUS instructions can be configured via RRC parameters. For example, a terminal may be configured with RRC parameters to specify a cell or group of cells indicated by the received LP-WUS, and when the terminal receives the LP-WUS, the instructions may be applied only to the configured cells.

[0256] The UE can receive LP-WUS from either the PCell or the SCell. If the UE receives from a non-PCell cell, this can be configured / instructed by the base station. Alternatively, the UE can select a cell among the non-PCell SCells that supports LP-WUS transmission for reception and report this to the base station.

[0257] When an LP-WUS instruction is transmitted to multiple cells that may have different SCS (subcarrier spacing), the time at which the terminal's operation is performed / started, such as the time at which the LP-WUS is received (or a monitoring occasion) or the time at which the terminal starts the operation according to the LP-WUS instruction, may follow the time unit defined in units of OFDM symbols / slots of MR based on the smallest SCS.

[0258] For example, if the MR of the terminal performs an operation in the first symbol of the slot nearest to the time point of receiving the LP-WUS in a specific cell, the next slot nearest to the time point of receiving the LP-WUS can be determined based on the smallest SCS for multiple cells. The MR operation for multiple cells can be performed from the start time of the first symbol of the slot determined based on the smallest SCS. This operation of the MR may be performing PDCCH monitoring or performing an instruction of PDCCH monitoring adaptation. In other words, if the instruction of LP-WUS is set for the terminal for multiple cells, the terminal can receive the LP-WUS and perform PDCCH monitoring or PDCCH monitoring adaptation from the first symbol of the slot nearest to the time point.

[0259]

[0260] <LP-WUS와 PDCCH의 모니터링 기회에 관한 설정>

[0261] The monitoring occasion of LP-WUS that can be received by a terminal in CONNECTED mode can be set to have a relationship with the monitoring occasion that can receive DCI format 2_6.

[0262] First, a time interval can be set during which the terminal can monitor DCI format 2_6 for a predetermined time interval prior to the expected start of the DRX active time of a predetermined cycle. Additionally, a predetermined time gap may be required between the detection of DCI format 2_6 and the start of the DRX active time.

[0263] Based on these settings, LP-WUS monitoring opportunities can be set. The time gap after LP-WUS reception until the UE starts DRX active time can be set to be greater than or equal to the value associated with DCI format 2_6. This may be because the time required to wake up the MR by LP-WUS reception may be greater than the time required to wake up the MR by DCI format 2_6 reception. For example, it can be set to X times the minimum time gap after DCI format 2_6 reception (where X is a real number). This can be set to the UE via higher layer signaling.

[0264] The monitoring opportunity of DCI format 2_6 and the monitoring opportunity of LP-WUS can be set by FDM (frequency division multiplexing). That is, LP-WUS can be transmitted in different frequency domains based on the ps-Offset in the existing setting. For example, the LP-WUS monitoring opportunity on the time axis can be determined based on the ps-Offset, and the position on the frequency axis can be determined according to the transmission frequency of LP-WUS. Alternatively, the LP-WUS monitoring opportunity can be set before the time interval in which DCI format 2_6 can be monitored. The terminal can first attempt to receive LP-WUS, and if it fails to receive it, it can attempt to monitor DCI format 2_6.

[0265] LP-WUS can be configured separately for Long DRX and Short DRX. For example, for Long DRX, it operates based on DCI format 2_6 as in the existing standard, and wake-up can be indicated based on LP-WUS only for Short DRX. That is, if the UE monitors PDCCH in Long DRX and a short DRX cycle starts thereafter, it can be configured to transmit a wake-up indication for each short DRX through LP-WUS.

[0266] Even when only Long DRX is configured, a wake-up indication by LP-WUS may be considered. If the DRX active time has started but no new transmission has actually occurred or no PDCCH transmission has occurred, and no other timers have run besides drx-onDurationTimer, the wake-up indication by LP-WUS may be considered to take precedence in the subsequent DRX cycle. This may be because, since there was no data transmission in the previous DRX cycle, it is highly likely that there will be no data transmission in the subsequent DRX cycle, and thus it is advantageous in terms of power savings not to perform reception of DCI format 2_6 to maintain a long sleep time of the MR. In addition, if ps-WakeUp={absent} is set and a wake-up indication is not received, it may be an operation to simply check for a wake-up indication via LP-WUS when the DRX active time has not started.

[0267] When the DRX active time has started and there is an actual new transmission or PDCCH transmission, which causes other timers including drx-onDurationTimer to run, it is possible to consider that the wake-up indication by LP-WUS will take precedence in the subsequent DRX cycles. This may be because there is a high probability that there will be data transmission in the subsequent DRX cycles since there was data transmission in the previous DRX cycle, but to check for the wake-up indication at low power to save power consumption. Additionally, if ps-WakeUp={true} is set and a wake-up indication has not been received, it may be a simple operation to check for the wake-up indication via LP-WUS when starting the DRX active time.

[0268]

[0269] In this disclosure, we propose a method for receiving LP-WUS of a terminal in CONNECTED mode and an operation according to the LP-WUS, and we propose settings and operations for receiving LP-WUS, and a configuration of information indicated through LP-WUS.

[0270] FIG. 15 is a diagram illustrating LP-WUS related operations for a terminal in CONNECTED mode proposed in the present disclosure.

[0271] Referring to FIG. 5, in step A05, the terminal receives settings related to LP-WUS that can be received in CONNECTED mode and terminal operation in CONNECTED mode. The settings related to LP-WUS may include settings such as information included in the payload and sequence proposed in the present disclosure. In addition, resources of the time / frequency axis through which the LP-WUS is transmitted may be included.

[0272] The LP-WUR type of a terminal capable of receiving LP-WUS can be classified into Type #1 and Type #2, and the settings may differ accordingly. Therefore, in step A10, the terminal can determine whether its LP-WUR type is Type #1 or Type #2.

[0273] If the LP-WUR of the terminal is type #1, the terminal can receive information (payload) modulated with an OOK symbol after energy detection as in step A15.

[0274] On the other hand, if the LP-WUR of the terminal is type #2, the terminal can receive OFDM sequence information overlaid on the OOK symbol through sequence detection as in step A20. In particular, although not illustrated in FIG. 15, if the LP-WUR of the LP terminal is type #2, the energy detection performed by LP-WUR type #1 can also be performed to receive information (payload) modulated into the OOK symbol.

[0275] In step A25, the terminal performs subsequent actions based on the information and instructions received in step A15 or step A20. These terminal actions may be based on basic actions instructed through the payload and additional information received through the sequence, as proposed in the present disclosure.

[0276]

[0277] FIG. 16 is a flowchart illustrating an example of a UE receiving an LP-WUS according to the present disclosure. In particular, it is assumed that the UE of FIG. 16 is in CONNECTED mode.

[0278] Referring to FIG. 16, in step B05, the UE reports information related to its LP-WUR (Low Power-Wake Up Receiver) type to the base station. Thereafter, in step B10, the UE receives an LP-WUS (Low Power-Wake Up Signal) consisting of a payload and a sequence from the base station.

[0279] Preferably, the payload comprises at least one OOK (On Off Keying) symbol, and the sequence is overlaid on the at least one OOK symbol. In particular, overlaying the sequence may include multiplying the waveform of the sequence by the ON region of the ON-OFF KEYING symbol.

[0280] More preferably, the payload and the sequence contain the same information for downlink control channel monitoring.

[0281] Additionally, the LP-WUS may be received from a UE-specific resource or from a resource area associated with a UE group to which the UE belongs.

[0282] Continuing, the UE detects at least one of the payload or the sequence from the LP-WUS based on the LP-WUR type in step B15. Specifically, if the LP-WUR is of the first type, the payload is detected from the LP-WUS. Additionally, if the LP-WUR is of the second type, the sequence may be detected from the LP-WUS, or both the payload and the sequence may be detected.

[0283] Finally, in step B20, the UE initiates monitoring of a downlink control channel transmitted from the base station based on at least one of the detected payloads or sequences. In particular, the downlink control channel monitoring is initiated after a specific time has elapsed from the time of receiving the LP-WUS, and information related to the specific time is set as a higher layer signaling.

[0284]

[0285] FIG. 17 is a flowchart illustrating an example of a base station transmitting an LP-WUS to a UE according to the present disclosure. In particular, it is assumed that the UE in FIG. 17 is in CONNECTED mode.

[0286] Referring to FIG. 17, the base station generates a LP-WUS (Low Power-Wake Up Signal) composed of a payload and a sequence at step C05, and transmits the LP-WUS (Low Power-Wake Up Signal) to the UE at step C05.

[0287] In particular, the payload and the sequence contain the same information for downlink control channel monitoring.

[0288] Thereafter, in step C15, the base station transmits a downlink control channel to the UE based on the same information for monitoring the downlink control channel.

[0289]

[0290] The present disclosure enables the terminal to configure information by distinguishing LP-WUS receivable by a terminal into an OOK symbol and an overlaid OFDM sequence. The terminal can receive such LP-WUS and perform operations according to the terminal's LP-WUR type.

[0291] In order to explain the principles of the invention, this disclosure provides examples based on the NR system. However, the proposed methods are not specifically limited to the transmission and reception forms of NR unless otherwise specified. In addition, in order to explain the principles of the invention, this disclosure provides examples based on the characteristics and structures of existing terminal operations. However, the proposed methods are not specifically limited to the support of the terminal unless otherwise specified. Therefore, it is self-evident that the methods proposed in this disclosure can be applied to all wireless communication transmission and reception structures and services, even without a separate description, as long as the principles of the invention are not violated.

[0292]

[0293] The embodiments described above are combinations of components and features of the present disclosure in a predetermined form. Each component or feature should be considered optional unless explicitly stated otherwise. Each component or feature may be implemented without being combined with other components or features. Furthermore, it is also possible to form embodiments of the present disclosure by combining some components and / or features. The order of operations described in the embodiments of the present disclosure may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment. It is self-evident that claims that do not have an explicit citation relationship in the patent claims may be combined to form embodiments or incorporated as new claims through post-application amendments.

[0294] It will be apparent to those skilled in the art that the present disclosure may be embodied in other specific forms without departing from the scope of the present disclosure. Therefore, the above detailed description should not be construed as limiting in any respect, but rather as illustrative. The scope of the present disclosure should be determined by a reasonable interpretation of the appended claims, and all modifications within the scope of equivalents of the present disclosure are intended to be included within the scope of the present disclosure.

[0295] The present disclosure may be used in a terminal, base station, or other equipment of a wireless mobile communication system.

Claims

1. In a method performed by UE (User Equipment), A step of receiving a Low Power-Wake Up Signal (LP-WUS) consisting of a payload and a sequence from a base station; detecting at least one of the payload or the sequence in the LP-WUS based on the LP-WUR (Low Power-Wake Up Receiver) type of the UE; and Including a step of initiating monitoring of a downlink control channel transmitted from the base station based on at least one payload or sequence detected above, The above payload and the above sequence, Containing the same information for monitoring the above downlink control channel, method.

2. In paragraph 1, Based on the above LP-WUR being the first type, the payload is detected in the LP-WUS, Based on the above LP-WUR being of the second type, the sequence is detected in the LP-WUS or both the payload and the sequence are detected. method.

3. In paragraph 1, The step of receiving the above LP-WUS is: A step of receiving the LP-WUS in a resource area related to a UE group to which the UE belongs, method.

4. In paragraph 1, The above payload consists of at least one OOK (On Off Keying) symbol, The above sequence is overlaid on at least one OOK symbol, method.

5. In paragraph 1, Further comprising a step of reporting information related to the type of LP-WUR of the UE to the base station, method.

6. In paragraph 1, After a certain period of time from the time of receiving the LP-WUS, monitoring of the downlink control channel is initiated, Information related to the above specific time is set by upper layer signaling. method.

7. As a UE (User Equipment) in a wireless communication system, at least one processor; and At least one computer memory storing instructions that, when executed by said at least one processor, cause said reader to perform operations, said operations comprising: A step of receiving a Low Power-Wake Up Signal (LP-WUS) consisting of a payload and a sequence from a base station; detecting at least one of the payload or the sequence in the LP-WUS based on the LP-WUR (Low Power-Wake Up Receiver) type of the UE; and Including a step of initiating monitoring of a downlink control channel transmitted from the base station based on at least one payload or sequence detected above, The above payload and the above sequence, Containing the same information for monitoring the above downlink control channel, UE.

8. In paragraph 7, Based on the above LP-WUR being the first type, the payload is detected in the LP-WUS, Based on the above LP-WUR being of the second type, the sequence is detected in the LP-WUS or both the payload and the sequence are detected. UE.

9. In paragraph 7, The step of receiving the above LP-WUS is: A step of receiving the LP-WUS in a resource area related to a UE group to which the UE belongs, UE.

10. In paragraph 7, The above payload consists of at least one OOK (On Off Keying) symbol, The above sequence is overlaid on at least one OOK symbol, UE.

11. In paragraph 7, The above actions are, Further comprising a step of reporting information related to the type of LP-WUR of the UE to the base station, UE.

12. In paragraph 7, After a certain period of time from the time of receiving the LP-WUS, monitoring of the downlink control channel is initiated, Information related to the above specific time is set by upper layer signaling. UE.

13. In a processing device in a wireless communication system, at least one processor; and At least one computer memory storing instructions that, when executed by at least one processor, cause a UE (User Equipment) to perform operations, the operations being: A step of receiving a Low Power-Wake Up Signal (LP-WUS) consisting of a payload and a sequence from a base station; detecting at least one of the payload or the sequence in the LP-WUS based on the LP-WUR (Low Power-Wake Up Receiver) type of the UE; and Including a step of initiating monitoring of a downlink control channel transmitted from the base station based on at least one payload or sequence detected above, The above payload and the above sequence, Containing the same information for monitoring the above downlink control channel, Processing unit.

14. In a non-transitory computer-readable storage medium, The storage medium stores at least one program code that, when executed by at least one processor, causes a UE (User Equipment) to perform operations, the operations comprising: A step of receiving a Low Power-Wake Up Signal (LP-WUS) consisting of a payload and a sequence from a base station; detecting at least one of the payload or the sequence in the LP-WUS based on the LP-WUR (Low Power-Wake Up Receiver) type of the UE; and Including a step of initiating monitoring of a downlink control channel transmitted from the base station based on at least one payload or sequence detected above, The above payload and the above sequence, Containing the same information for monitoring the above downlink control channel, Storage medium.

15. In a method performed by a base station, A step of generating a Low Power-Wake Up Signal (LP-WUS) consisting of a payload and a sequence, wherein the payload and the sequence include the same information for monitoring a downlink control channel; A step of transmitting a LP-WUS (Low Power-Wake Up Signal) to a UE (User Equipment); and comprising a step of transmitting the downlink control channel to the UE; method.

16. As a base station in a wireless communication system, at least one processor; and At least one computer memory storing instructions that, when executed by said at least one processor, cause said reader to perform operations, said operations comprising: A step of generating a Low Power-Wake Up Signal (LP-WUS) consisting of a payload and a sequence, wherein the payload and the sequence include the same information for monitoring a downlink control channel; A step of transmitting a LP-WUS (Low Power-Wake Up Signal) to a UE (User Equipment); and comprising a step of transmitting the downlink control channel to the UE; Base station.

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