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

Abstract

A method performed by a user equipment (UE) according to at least one of embodiments disclosed in the present disclosure comprises the steps of: receiving a plurality of synchronization signal blocks from a base station through a serving cell, wherein each of the plurality of synchronization signal blocks includes a synchronization signal and first system information; selecting at least one synchronization signal block from among the plurality of synchronization signal blocks; determining a WUS Occasion (WO) for uplink wake up signal (WUS) transmission on the basis of a synchronization signal included in the selected at least one synchronization signal block; and transmitting, to the base station through the serving cell, the uplink WUS for requesting transmission of second system information on the determined WO.

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 for efficiently setting up and transmitting a WUS (Wake Up Signal) for requesting system information and a device therefor.

[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 a plurality of synchronization signal blocks from a base station through a serving cell, each of the plurality of synchronization signal blocks including a synchronization signal and first system information; selecting at least one synchronization signal block from the plurality of synchronization signal blocks; determining a WO (WUS Occasion) for uplink WUS (Wake Up Signal) transmission based on a synchronization signal included in the selected at least one synchronization signal block; and transmitting the uplink WUS to the base station through the serving cell to request transmission of second system information on the determined WO.

[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 a plurality of synchronization signal blocks from a base station through a serving cell, each of the plurality of synchronization signal blocks including a synchronization signal and first system information; selecting at least one synchronization signal block among the plurality of synchronization signal blocks; determining a WO (WUS Occasion) for uplink WUS (Wake Up Signal) transmission based on a synchronization signal included in the selected at least one synchronization signal block; and transmitting the uplink WUS to the base station through the serving cell to request transmission of second system information on the determined WO.

[0008] Preferably, the UE can receive the second system information in response to the uplink WUS from the base station through the serving cell.

[0009] Preferably, the frequency resources and time resources of the WO are determined based on the synchronization signal included in the at least one selected synchronization signal block or the first system information included in the at least one selected synchronization signal block.

[0010] Preferably, the time resource of the WO can be determined based on a reception time of a synchronization signal included in the at least one synchronization signal block or a relative reception time based on a System Frame Number (SFN).

[0011] Preferably, the step of determining a WO for the uplink WUS transmission comprises the step of selecting one of a plurality of WOs associated with the plurality of synchronization signal blocks as the WO for the uplink WUS transmission, and the first system information includes information about the plurality of WOs.

[0012] Preferably, the step of determining a WO for the uplink WUS transmission includes a step of determining a frequency resource of the WO for the uplink WUS transmission based on at least one of a lowest subcarrier index, a highest subcarrier index, and a center frequency of a synchronization signal included in the at least one synchronization signal block.

[0013] Preferably, the first system information includes a PBCH (Physical Broadcast Channel), and the second system information includes a SIB1 (System Information Block 1).

[0014] Meanwhile, according to one aspect of the present disclosure, a method performed by a base station comprises the steps of transmitting a plurality of synchronization signal blocks to a UE (User Equipment) through a serving cell, each of the plurality of synchronization signal blocks including a synchronization signal and first system information; and receiving an uplink WUS (Wake Up Signal) for requesting transmission of second system information on a WO (WUS Occasion) from the UE through the serving cell, wherein the WO on which the uplink WUS is received is determined based on a synchronization signal included in at least one synchronization signal block among the plurality of synchronization signal blocks.

[0015] 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.

[0016] According to one embodiment, a wireless signal transmission and reception process can be efficiently performed. For example, a WUS (Wake Up Signal) for requesting system information can be efficiently set up and transmitted.

[0017] Other effects not mentioned can be inferred from the description below.

[0018] 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.

[0019] Figure 1 illustrates a flexible network topology to which some examples of this specification may be applied.

[0020] FIG. 2 illustrates an example of a communication system applicable to the present disclosure.

[0021] FIG. 3 illustrates an example of a wireless device applicable to the present disclosure.

[0022] 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.

[0023] Figure 5 illustrates a general functional architecture for an AI / ML model.

[0024] 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.

[0025] FIG. 7 illustrates an electromagnetic spectrum according to one embodiment of the present disclosure.

[0026] FIG. 8 illustrates an example of a procedure for transmitting system information for THz communication to which the present disclosure applies.

[0027] Figure 9 illustrates a beam management procedure applicable to the present disclosure.

[0028] 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.

[0029] 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.

[0030] FIG. 12 illustrates an example of a sensing operation according to one embodiment of the present disclosure.

[0031] FIG. 13 illustrates time / frequency resources for sensing operations according to one embodiment of the present specification.

[0032] FIG. 14 illustrates a procedure related to a sensing operation according to one embodiment of the present specification.

[0033] Figure 15 illustrates examples of scenarios in which the on-demand SIB1 process is implemented.

[0034] FIG. 16 illustrates an example of setting time resources of one WO according to the present disclosure.

[0035] FIG. 17 is a signal flow diagram illustrating an example of transmitting and receiving on-demand SI-1 according to the present disclosure.

[0036] FIG. 18 is a flowchart illustrating an example in which a UE requests on-demand SI-1 according to the present disclosure.

[0037] FIG. 19 is a flowchart illustrating an example of a base station receiving an UL WUS requesting on-demand SI-1 according to the present disclosure.

[0038] 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."

[0039] 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."

[0040] 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".

[0041] 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.”

[0042] 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."

[0043] 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.

[0044] In the following explanation, ‘when, if, in case of’ can be replaced with ‘based on’.

[0045] Technical features individually described in a single drawing in this specification may be implemented individually or simultaneously.

[0046] 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 a communication between two points that is 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).

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] Figure 1 illustrates a flexible network topology to which some examples of this specification may be applied.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] Figure 2 illustrates a communication system applicable to the present disclosure.

[0060] 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).

[0061] 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).

[0062] 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.

[0063] FIG. 3 illustrates an example of a wireless device applicable to the present disclosure.

[0064] 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).

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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).

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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).

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086]

[0087] Below, the core technologies of the 6G system are explained.

[0088] 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.

[0089]

[0090] Artificial intelligence

[0091] 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.

[0092] The following describes a functional framework for AI / ML operations.

[0093] Below, to explain AI (or AI / ML) more specifically, the terms can be defined as follows.

[0094] - Data collection: Data collected from network nodes, management entities, or terminals as a basis for AI model training, data analysis, and inference.

[0095] - 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.

[0096] - 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.

[0097] - AI / ML Inference: The process of making predictions or inducing decisions based on collected data and the AI ​​model using a trained AI model.

[0098] 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.

[0099] Figure 5 illustrates a general functional architecture for an AI / ML model.

[0100] 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.

[0101] 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).

[0102] 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.

[0103] 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).

[0104] 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.

[0105] 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).

[0106] 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)).

[0107] 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).

[0108] A Model Transfer / Delivery Request (33) can be used to request model(s) from Model Storage (50).

[0109] 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).

[0110] 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).

[0111] 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.

[0112] 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.

[0113] Model Transfer / Delivery (51) is used to transfer AI / ML models to inference functions.

[0114] 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.

[0115] Cat 0a) No collaboration framework: AI / ML algorithms are purely implementation-based and do not require any changes to the wireless interface.

[0116] Cat 0b) This level corresponds to a framework with a modified wireless interface tailored to efficient implementation-based AI / ML algorithms, but without collaboration.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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:

[0123] - 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.

[0124] - 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).

[0125] - 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.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] 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.

[0134]

[0135] <THz 통신(terahertz communication)>

[0136] 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.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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).

[0144] 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.

[0145] 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.).

[0146] 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.

[0147] 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).

[0148] 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.

[0149]

[0150] Non-terrestrial networks (NTN)

[0151] NTN can represent a network or network segment that uses radio frequency (RF) resources mounted on satellites (or unmanned aerial system (UAS) platforms).

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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).

[0156]

[0157] Integrated Sensing and Communication (ISAC)

[0158] 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.

[0159] 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).

[0160] 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.

[0161] 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.

[0162] - 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).

[0163] - 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).

[0164] - 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).

[0165] - 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).

[0166] - 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).

[0167] - 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).

[0168] 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.

[0169] 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.

[0170] 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.

[0171] 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.

[0172] 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.

[0173] 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.

[0174] 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.).

[0175] 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.

[0176] 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.

[0177] 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.

[0178] 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.

[0179] 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).

[0180] 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.

[0181] 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.

[0182]

[0183] <NR 시스템에서의 NES (network energy saving) 개선>

[0184] Recently, in the NR standardization release 19, an improvement of the network energy saving (NES) technology is being discussed, in which the base station transmits SSB on a specific cell through an on-demand SSB process to reduce energy consumption. In the existing NR system, SSB must be transmitted periodically and always for purposes such as time / frequency synchronization or RRM measurement, making it difficult to reduce energy consumption even when the base station has no data to receive or send. Considering this, the base station can reduce base station energy consumption by not performing SSB transmission until the on-demand SSB process is involved and then performing SSB transmission. The on-demand SSB process can be triggered using one of the following methods.

[0185] 1) The terminal requests SSB transmission from the base station by transmitting an uplink signal / uplink channel (e.g., PRACH, PUCCH, PUSCH, SRS, etc. in the NR system);

[0186] 2) Requesting SSB transmission from base station (or TRP) #1 to base station (or TRP) #2 via an interface between base stations (e.g., Xn interface in NR system) or backhaul signaling;

[0187] 3) Signaling whether SSB transmission is possible for the corresponding SCell through SCell activation / deactivation signaling.

[0188] Considering coexistence with existing NR terminals, NR standardization Release 19 is limited to discussing on-demand SSB operation for CONNECTED mode terminals and SCells. However, in future releases or next-generation communication systems, on-demand SSB operation (for SSB transmission on PCell) considering INACTIVE mode terminals, IDLE mode terminals, or initially connected terminals may be defined. In addition, CA (carrier aggregation) including the SCell can be applied to both intra-band CA and inter-band CA, and SSB on the SCell transmitted through the on-demand SSB process can be utilized for at least functions such as time / frequency synchronization, L1 / L3 measurement, and SCell activation.

[0189] Meanwhile, as part of improving NES in the NR system, a method for reducing energy consumption by having the base station transmit SIB1 for a specific cell through the on-demand SIB1 process can be discussed. In the existing NR system, SIB1 containing system information and RA (random access) information for initial access or idle mode terminals to access a cell must always be periodically provided, making it difficult to reduce energy consumption even when the base station has no data to receive or send. Considering this, the base station can reduce base station energy consumption by not performing SIB1 transmission until the on-demand SIB1 process is accompanied and then performing SIB1 transmission.

[0190] The on-demand SIB1 process can be triggered by the base station's SIB1 transmission by the terminal transmitting an uplink signal / uplink channel (e.g., PRACH in an NR system), and the following scenarios can be considered specifically, which are examples only and may not be limited to the following scenarios.

[0191] Figure 15 illustrates examples of scenarios in which the on-demand SIB1 process is implemented.

[0192] First, Fig. 15(a) illustrates Scenario 1 in which the on-demand SIB1 process is implemented. Specifically, a terminal that receives an SSB (and / or other downlink signal / downlink channel) from cell #1 and recognizes that SIB1 is not transmitted on the cell #1 can trigger SIB1 transmission by transmitting a WUS (wake-up signal) requesting SIB1 based on information provided in the SSB (and / or other downlink signal / downlink channel) and / or predetermined information. The base station that receives the WUS can transmit a specific downlink signal / downlink channel on cell #1 in response thereto, and can transmit SIB1 on cell #1 (or without transmitting the downlink signal / downlink channel).

[0193] Next, Fig. 15(b) illustrates Scenario 2 in which the on-demand SIB1 process is implemented. Specifically, a terminal that receives an SSB (and / or other downlink signal / downlink channel such as SIB1) from cell #1 and recognizes that SIB1 is not transmitted on the corresponding cell #2 may attempt to camp on cell #2. The terminal may trigger SIB1 transmission for cell #2 by transmitting a WUS requesting SIB1 on cell #1 based on information provided in the received SSB (and / or other downlink signal / downlink channel such as SIB1) and / or predetermined information. The base station that receives the WUS may transmit a specific downlink signal / downlink channel (on cell #1 or cell #2) in response thereto, and may transmit SIB1 for cell #2 on cell #1 or cell #2 (or without transmitting the corresponding downlink signal / downlink channel).

[0194] Finally, Fig. 15(b) illustrates Scenario 2 in which the on-demand SIB1 process is implemented. Specifically, a terminal that receives an SSB (and / or other downlink signal / downlink channel such as SIB1) from cell #1 and recognizes that SIB1 is not transmitted on cell #2 may attempt to camp on cell #2. The terminal may trigger SIB1 transmission for cell #2 by transmitting a signal (i.e., WUS) requesting SIB1 on cell #2 based on information provided in the received SSB (and / or other downlink signal / downlink channel such as SIB1) and / or predetermined information. The base station receiving the WUS may transmit a specific downlink signal / downlink channel (on cell #1 or cell #2) in response thereto, or transmit SIB1 for cell #2 on cell #1 or cell #2 (or without transmitting the corresponding downlink signal / downlink channel).

[0195] When multiple cells are involved in on-demand SIB1 operation, such as in Scenario 2 or Scenario 3 described above, Cell #1 may refer to Cell A, a cell on which SIB1 for the corresponding cell is periodically transmitted, and may also be expressed as Cell #1 or an anchor cell. In addition, Cell #2 may refer to a NES cell, a cell on which SIB1 is provided in response to an uplink WUS from a terminal, and may also be expressed as Cell #2 or a non-anchor cell.

[0196] The method by which a terminal discovers a cell and recognizes that the cell is a NES cell (requiring on-demand SIB1 operation) may be at least one or a combination of the following methods.

[0197] - The terminal can recognize that it is a NES cell through SIB and / or WUS configuration information (provided from cell A).

[0198] - The terminal can recognize that it is a NES cell through information such as the center frequency of PBCH / MIB / SSB (received from the NES cell).

[0199] - The terminal can recognize that it is a NES cell through DCI information (received from the NES cell). The terminal can receive the DCI in the CORESET / SS (search space) set in the PBCH / MIB / SSB (received from the NES cell). In addition, a separate RNTI value for the DCI can be set / defined in advance.

[0200] - If a terminal attempts to receive SIB1 of a cell and fails to receive SIB1 for a certain period of time, the terminal can recognize that it is a NES cell.

[0201] Meanwhile, the terminal may be provided with a configuration for an uplink WUS requesting SIB1 for an NES cell through at least one or a combination of the following methods.

[0202] - RRC message transmitted from cell A (e.g. SIB1 or other SIB, RRC release message)

[0203] - DCI transmitted on Cell A or NES cell

[0204] - Msg-2 / Msg-4 (in the 4-step RA procedure) or MsgB (in the 2-step RA procedure) transmitted from cell A.

[0205] - Center frequency of PBCH / MIB / SSB transmitted on NES cell

[0206] - Information that is set in advance or defined in advance

[0207] Meanwhile, as part of improving NES in NR systems, a method for reducing energy consumption by having the base station adjust common signal / common channel transmissions such as SSB, PRACH, and paging can be discussed. Completely turning off SSB can significantly reduce the energy consumption of the base station, but if there is no SSB, which performs functions such as time / frequency synchronization or RRM measurement, stable operation for the corresponding cell may not be guaranteed from the perspective of the terminal. Considering this, energy saving effects of the base station can be promoted by changing the SSB transmission pattern (e.g., transmission period, period of each SSB candidate index(es), SSB candidate index(es) transmitted within one transmission period, transmission power, etc.) according to the situation.

[0208] In the case of PRACH resources, since the base station does not know when the terminal will transmit the PRACH in the case of contention-based random access (RA), energy consumption may increase because the base station always attempts to receive in the configured PRACH resources. Considering this, the energy of the base station can be saved by adjusting the amount of PRACH resources, for example, adjusting the period of PRACH resources, or adjusting the amount of resources by pre-configuring PRACH resource set #1 and PRACH resource set #2 and indicating whether to turn on only one of the two PRACH resource sets or both PRACH resource sets, or applying a method of providing the amount of RACH resources in a constant or variable manner according to the SSB index.

[0209] In the case of paging, previously, PF (paging frame) and / or PO (paging occasion) were distributed along the time axis within the DRX cycle (or paging cycle), and the terminal attempted to receive paging at a specific PF / PO derived from its ID. From the base station's perspective, if paging was to be transmitted to multiple terminals simultaneously, it may have to wake up frequently to transmit paging. To reduce the resulting base station energy consumption, PF and / or PO for paging reception can be placed as close to the time axis as possible, or different frequency axis resources can be placed within the same time frame.

[0210]

[0211] <SI 요청을 위한 WUS 설정 및 송신>

[0212] In the 5G NR and 6G communication standards, a base station can transmit a synchronization signal (SS) for communication between a base station and a terminal, and the terminal can obtain time and / or frequency synchronization by receiving the SS. In the 5G NR system, the SS is composed of a primary SS (PSS) and a secondary SS (SSS), and the terminal can obtain physical cell ID (PCI) information through a combination of the PSS and SSS. The 6G communication standard may also require a similar form of SS, and for example, the SS may include some / all of the PCI, TRP ID, and beam index. In the 5G NR system, the PBCH is transmitted along with the PSS / SSS across 4 OFDM symbols in the time axis and 20 RB in the frequency axis, and the corresponding block is called an SSB (SS / PBCH block). The PBCH may include time information such as SFN (system frame number) / HFI (half frame indicator) / SSB index, PRB grid information such as sub-carrier offset, sub-carrier spacing / CORESET / Type0-PDCCH CSS set information for PDCCH reception that schedules SIB1 PDSCH, DMRS Type A position information, cell barring information, CRC, etc. The UE can obtain time / frequency synchronization and PCI-related information through PSS / SSS, and obtain additional timing information and information required for SIB1 reception through PBCH. Based on this information, the UE can receive SIB1 to obtain DL BWP / UL BWP, RA procedure-related information, etc., and access the corresponding cell to initiate communication.

[0213] A similar initial access procedure may be introduced in the 6G system. For example, after the SS is transmitted, a signal / channel similar to the PBCH of 5G NR (hereinafter, SI-0) may be transmitted, which may include all or part of the information carried in the PBCH of 5G NR. After that, a signal / channel similar to the SIB1 of 5G NR (hereinafter, SI-1) may be transmitted, which may include all or part of the information carried in the SIB1 of 5G NR.

[0214] In this disclosure, we consider a scenario where SI-1 is not always transmitted to save energy at the base station. By receiving SS and SI-0, the terminal can recognize that SI-1 is not transmitted periodically in the corresponding cell and that UL WUS transmission is required to trigger SI-1 transmission by the base station. Accordingly, the terminal can receive configuration for UL WUS resources for requesting SI-1. Through the configured resources, the terminal transmits UL WUS, the base station transmits SI-1, and the terminal can access the corresponding cell by receiving SI-1, thereby initiating communication. Therefore, this disclosure specifically proposes a method for configuring UL WUS resources for requesting SI-1. The UL WUS can be, for example, a Zadoff chu sequence (such as PRACH).

[0215] As an extension of the present disclosure, a scenario may be considered in which even SI-0 may not be transmitted to save energy at the base station. The terminal may receive configuration for UL WUS resources for requesting SI-0 by receiving an SS. An extension to this scenario, in which the terminal transmits UL WUS through the configured resources and receives SI-0, thereby connecting to the corresponding cell and initiating communication, is also described below.

[0216] Hereinafter, a UL WUS transmission opportunity (occasion) is conveniently defined as WO, which may denote a specific time / frequency resource. One or more WUS sequences may correspond to one WO.

[0217]

[0218] (1) Method for setting frequency resources of UL WUS

[0219] In a situation where only SS / SI-0 is received by the terminal, the frequency resource information of the corresponding cell (e.g., cell / carrier BW or BW of initial BWP) may not be accurately identified from the terminal's perspective, so it is desirable to set the frequency resource of UL WUS (i.e., WO) based on the frequency location of SS.

[0220] For example, the relative frequency position between the lowest subcarrier index (or highest subcarrier index or center frequency) of the SS and the WO can be defined. Specifically, the lowest subcarrier index (or highest subcarrier index or center frequency) of the SS and the lowest subcarrier index (or highest subcarrier index or center frequency) of the WO can be the same. As another example, the link relationship between the lowest subcarrier index (or highest subcarrier index or center frequency) of the SS and the lowest subcarrier index (or highest subcarrier index or center frequency) of the WO can be defined in advance, and if there is more than one lowest subcarrier index (or highest subcarrier index or center frequency) of the WO linked to the lowest subcarrier index (or highest subcarrier index or center frequency) of one SS, the base station can explicitly set / indicate one of the values, or it can be implicitly determined (e.g., determined based on the PCI, TRP index, or UE index). For example, when the lowest subcarrier index (or highest subcarrier index or center frequency) of the linked WO is N and the PCI derived by the terminal through the SS is K, if the value corresponding to the {mod(K, N)+1}th of the N is X, the terminal can determine the location X away from the lowest subcarrier index (or highest subcarrier index or center frequency) of the SS as the lowest subcarrier index (or highest subcarrier index or center frequency) of the WO.

[0221] Alternatively, an offset between the lowest subcarrier index (or highest subcarrier index or center frequency) of the SS and the WO may be defined / set. The granularity of the offset may be per subcarrier, or per group of subcarriers (e.g., PRB with 12 subcarriers as a group). Here, the size of the subcarrier may be the subcarrier size applied to the SS (or SI-0 or SI-1 or UL WUS) or may be a predefined subcarrier size. As a specific example, if the offset is defined / set to be K subcarriers, it may mean that the lowest subcarrier index (or highest subcarrier index or center frequency) of the WO is shifted (upward or downward) by K subcarriers from the lowest subcarrier index (or highest subcarrier index or center frequency) of the SS.

[0222] Alternatively, if a specific frequency resource F_base (e.g., a frequency range in which a PDCCH scheduling SI-1 can be transmitted or the lowest index subcarrier / highest index subcarrier / center frequency of the frequency range) can be signaled via SI-0, it may be possible to configure the frequency resource of the WO based on the frequency resource. Here, F_base may mean the lowest subcarrier position of CRB 0 on the CRB grid in a 5G NR system, or may mean the position of the lowest index subcarrier / highest index subcarrier / center frequency of CORESET#0.

[0223] For example, the relative frequency position between F_base and WO can be defined. Specifically, the lowest subcarrier index (or highest subcarrier index or center frequency) of F_base and WO can be the same. Alternatively, an offset between F_base and WO can be defined / set. The granularity of the offset can be in subcarrier units or in subcarrier group units (e.g., PRBs of 12 subcarriers). Here, the subcarrier size can be the subcarrier size applied to SS (or SI-0 or SI-1 or UL WUS) or can be a predefined subcarrier size. As a specific example, if the offset is defined / set as N PRBs (wherein PRBs are groups of 12 subcarriers), it can mean that the lowest subcarrier index (or highest subcarrier index or center frequency) of WO is shifted (upward or downward) by N PRBs from F_base.

[0224] In the frequency resource setting method of UL WUS proposed in the present disclosure, the frequency axis BW occupied by a WO may be a value that is predefined or set / indicated. For example, if the UL WUS sequence length is 139, the BW corresponding to 12 PRBs, which is the minimum number of PRBs greater than that, may be defined as the BW of the WO.

[0225] In addition, the frequency resource setting method of UL WUS proposed in the present disclosure may be suitable for a TDD band where the downlink spectrum and the uplink spectrum are unpaired. In an FDD band where the downlink spectrum and the uplink spectrum are paired, the method may be applied based on a specific subcarrier of the uplink spectrum linked to the downlink spectrum that received SS / SI-0, and the subcarrier may be a value that is defined in advance or set / indicated.

[0226] For example, the relative frequency location between a specific subcarrier of the uplink spectrum and a WO can be defined. Specifically, a specific subcarrier of the uplink spectrum and the lowest subcarrier index (or highest subcarrier index or center frequency) of the WO can be the same. As another example, a link relationship between the lowest subcarrier index (or highest subcarrier index or center frequency) of an SS and the lowest subcarrier index (or highest subcarrier index or center frequency) of a WO (within the uplink spectrum) can be defined in advance, and if there is more than one lowest subcarrier index (or highest subcarrier index or center frequency) of a WO (within the uplink spectrum) linked to the lowest subcarrier index (or highest subcarrier index or center frequency) of an SS, the base station can explicitly set / indicate one of the values, or it can be implicitly determined (e.g., determined based on a PCI, TRP index, or UE index). For example, if the lowest subcarrier index (or highest subcarrier index or center frequency) of the linked WO (within the uplink spectrum) is N and the PCI derived by the terminal through SS is K, and the value corresponding to the {mod(K, N)+1}th of the N is X, the terminal can determine the location X away from a specific subcarrier of the uplink spectrum as the lowest subcarrier index (or highest subcarrier index or center frequency) of the WO.

[0227] Alternatively, an offset between a specific subcarrier of the uplink spectrum and the WO may be defined / configured. The granularity of the offset may be per subcarrier, or per group of subcarriers (e.g., a PRB with 12 subcarriers as a group). Here, the size of the subcarrier may be the subcarrier size applied to the SS (or SI-0 or SI-1 or UL WUS) or may be a predefined subcarrier size. As a specific example, if the offset is defined / configured as K subcarriers, it may mean that the lowest subcarrier index (or highest subcarrier index or center frequency) of the WO is shifted (upward or downward) by K subcarriers from a specific subcarrier of the uplink spectrum.

[0228] The number of WOs along the frequency axis can be fixed to one, or defined or set to one or more values. If multiple frequency-multiplexed (FDMed) WOs are defined / set, the frequency-axis spacing between the WOs can also be defined or set.

[0229] If the UL WUS or WO frequency resources are defined within the SS band or determined based on the frequency location of the SS, etc., and the base station is performing transmission and reception only for band #A, which performs SS / SI-0 and WO transmission and reception, and then receives the UL WUS transmitted by the UE, the base station may need to perform transmission and reception for band #B to schedule SI-1. That is, if band #A, which performs transmission and reception before SI-1 transmission, and band #B, which performs SI-1 transmission, are different (or band #B is larger than band #A), a processing delay similar to the BWP switching delay may be required from the base station's perspective. Therefore, the minimum gap between the time points of SI-1 reception expected by the UE after UL WUS transmission may be separately defined, or the base station may set the size of the gap. For example, it may be defined as a value larger than the minimum gap between the time points of RAR reception expected by the UE after PRACH transmission in a 5G NR system.

[0230] The base station can receive an UL WUS for requesting SI-1 transmitted by a terminal in the frequency resources of the WO set or defined as above. If the base station successfully receives the UL WUS, it can initiate a response to the UL WUS and / or SI-1 transmission.

[0231]

[0232] (2) UL WUS time resource setting method

[0233] Considering an SS structure linked to one or more beam indices, each WO may also be linked to one or more beam indices. Here, the linkage of a WO to a specific beam index (or SS index) may mean that there is a connection between the WO and the SS having the corresponding beam index (or SS index).

[0234] In the present disclosure, a bundle of WOs including at least one WO associated with all SS indices that can be transmitted (or are being transmitted) in a corresponding cell is referred to as a WO burst. For example, if a maximum of L_max SS indices can be transmitted in a corresponding cell or L_act (<= L_max) SSB indices are being transmitted, WOs associated with L_max or L_act SS indices can be defined as one WO burst. For example, the L_max value can be defined in advance (for example, different L_max values ​​are defined in advance depending on the frequency band), and the L_act value can be signaled via SI-0 (or SI-1).

[0235] The position of a WO burst can be determined (the starting position of a WO burst) by the parameters {WO period, WO offset}, and the position of each WO within one WO burst can be determined by the parameters {number of WOs, length / interval of WO}.

[0236] The WO period can be predefined (e.g., 160 msec), determined as a relative value of the SS period (e.g., determined as n times the SS period, where n can be a predefined or set value, and the SS period value can be a predefined or set value), or can be explicitly set.

[0237] The WO offset can be predefined (e.g., 10 msec), determined as a relative value from the SS (e.g., determined as a location X msec away from SS index #0, where X can be a predefined or set value), explicitly set (e.g., when Y candidates for the WO offset are defined, one of them is set), or implicitly determined (e.g., when Y candidates for the WO offset are defined, one of them is derived based on the cell index / TRP index, specifically, the {mod(cell index, Y)+1}th candidate value among the Y candidate values).

[0238] When determining the WO offset as a relative value from SS, the starting point of the offset can be determined as one of 1) to 4) below.

[0239] 1) Starting boundary / ending boundary of the slot where the first (or first SSB index belonging to L_act) is transmitted;

[0240] 2) The first or last symbol transmitted with the first (or first in L_act) SSB index;

[0241] 3) Start boundary / end boundary of the slot where the L_max-th (or last belonging to L_act) SSB index is transmitted;

[0242] 4) The first or last symbol transmitted with the L_max-th (or last in L_act) SSB index.

[0243] The WO offset may be a value applied based on a specific SFN index (SFN=0). For example, when the WO period is determined to be 160 msec and there are four candidates for the WO offset, 10 / 50 / 90 / 130 msec in total, if the modulo 4 value of the PCI acquired by the terminal through SS is 3, the terminal can recognize that a periodic WO burst is located with a period of 160 msec from 130 msec based on SFN=0.

[0244] The number of WOs can be determined by the SS-to-WO mapping ratio. If the SS-to-WO mapping ratio is 1, it means that one SS index is mapped to one WO. If the SS-to-WO mapping ratio is greater than 1 (i.e., N), it means that N SS indices are mapped to one WO (or the same SS index is mapped to N WOs). If the SS-to-WO mapping ratio is less than 1 (i.e., 1 / N), it can mean that N WOs have the same SS index (or N SS indices are mapped to one WO). The SS-to-WO mapping ratio can be defined or set to a specific value (e.g., 1) in advance. In this case, the “number of WOs” value can be defined as the maximum number of WOs to which all SS indices of L_max or L_act can be mapped at least K times (e.g., K can be defined or set to a specific value, e.g., 1) in advance). If the “number of WOs” is determined based on L_max and N=K=1, the number of WOs constituting one WO burst can be L_max.

[0245] The WO length / interval parameter may be a parameter that determines the time duration (which may include CP and guard time) that one WO spans and / or the interval between WOs (or WO groups). If the time duration that one WO occupies may be Z OFDM symbols (from S OFDM symbols), the corresponding S value and / or Z value may be a predefined value (e.g., 12 or the maximum number of OFDM symbols supported for PRACH) or a set value. The WO interval may be set / applied for each WO (group), and the interval may be a symbol level value or a slot level value. If multiple WOs are included in one WO group, the WOs may be arranged consecutively without an interval between the WOs. For example, if a WO interval is 4 symbols, 3 WOs form a WO group, and the interval between WO groups is 2 slots, the structure may be such that 3 WOs are sequentially arranged in the starting slot #n of the WO burst, and 3 WOs are sequentially arranged again in slot #n+2. The number of WOs belonging to a WO group and / or the interval between WO groups may be defined or set in advance, respectively.

[0246] FIG. 16 illustrates an example of setting time resources of one WO according to the present disclosure.

[0247] Referring to Fig. 16, the period of SS / SI-0 (i.e., T1-T0) and the period of WO burst (i.e., T3-T2) can be defined / set differently. If the reference point of WO offset, such as SFN index=0 or SS(+SI-0) burst start / end point, is T0, T2-T0 can mean WO offset. When L beam indices are transmitted within one SS+SI-0 burst, WOs corresponding to N SS / beam indices can be transmitted within a WO burst, and if the SS to WO mapping ratio is 1, N=L. In addition, the interval between WOs (groups) within a WO burst can also be defined / set through the above methods.

[0248] The base station can receive an UL WUS for requesting SI-1 transmitted by a terminal within the time resources of the WO set in the present disclosure. If the base station successfully receives the UL WUS, it can initiate a response to the UL WUS and / or SI-1 transmission.

[0249]

[0250] (3) Sequence setting and power control method of UL WUS

[0251] The number of UL WUS sequences (=N_WUS) corresponding to one SS index can be predefined or set. Considering that any terminal requests SI-1 and the base station that receives the SI-1 transmits the SI-1, it is desirable to define the number of UL WUS sequences corresponding to one SS index as 1. However, if a contention resolution function is considered in addition to the SI-1 request function, it may be advantageous to have multiple UL WUS sequences corresponding to one SS index. Therefore, the N_WUS value can be predefined or set to a specific value (e.g., N_WUS=1). For example, if two SS indexes are linked to one WO and the N_WUS value is 1, two UL WUS sequences should be provided to the WO. As another example, if one SS index is linked to one WO and the N_WUS value is 4, four UL WUS sequences should be provided to the WO.

[0252] Information about the UL WUS sequences that constitute each WO (e.g., root sequence index, CS (cyclic shift) index, etc.) can be defined or set in advance. For example, a rule can be applied to derive the starting index of the root sequence based on the cell index / TRP index, apply the derived root sequence index to the first WO, and apply the next index (or the same index) to the second WO.

[0253] If multiple UL WUS sequences exist in one WO, the CS value can be applied by dividing the maximum CS number into N_WUS equal parts. For example, if the UL WUS sequence length is determined to be 139, the maximum CS number can be 139, and if N_WUS is 4, when the result obtained through the floor(139 / 4) (or ceiling(139 / 4)) operation is defined as CS_unit, the CS values ​​of the four UL WUS sequences can be determined so that each sequence differs by CS_unit.

[0254] In the RA procedure of the existing 5G NR system, the path loss can be measured using the SSB power value of the base station and the power value of the actual SSB reception, and the PRACH initial power value can be set based on the measured value. In addition, if a RACH failure occurs due to a reception failure such as msg2 / 4 after the PRACH transmission, the number of PRACH retransmissions and / or the power ramping counter is increased, and the PRACH transmission power is increased by the power step. For UL WUS transmission, the SS power and / or power step can be set similarly to the existing method, or some / all parameter values ​​can be defined in advance to minimize the configuration information. For example, if the SS power value is defined as a specific value, the terminal can perform path loss measurement by assuming that the SS is transmitted from the base station at the corresponding power without separate information. As another example, if the power step is defined to a specific value and SI-1 is not received after UL WUS, a power ramping counter can be incremented and the UL WUS retransmission can be attempted by increasing (or maintaining) the power by the power step.

[0255] The base station can receive a UL WUS for requesting SI-1 transmitted by a terminal from the UL WUS sequence resources set or defined as described above. If the base station successfully receives the UL WUS, it can initiate a response to the UL WUS and / or SI-1 transmission.

[0256]

[0257] (4) Resource signaling method of UL WUS

[0258] In determining the UL WUS resources proposed in the present disclosure, at least some / all of the following parameters may be set by the base station.

[0259] - The lowest subcarrier index (or highest subcarrier index or center frequency) of the WO linked to the lowest subcarrier index (or highest subcarrier index or center frequency) of the SS.

[0260] - The lowest subcarrier index (or highest subcarrier index or center frequency) of SS or the offset between F_base and WO

[0261] - Frequency axis BW occupied by WO (or sequence length of WO)

[0262] - (For FDD) A specific subcarrier of the uplink spectrum linked to the downlink spectrum that received SS / SI-0.

[0263] - (For FDD) Offset between a specific subcarrier and WO in the uplink spectrum

[0264] - Number of frequency axis WOs and / or frequency spacing between WOs (if multiple frequency multiplexed WOs are defined / set up)

[0265] - The multiplier relationship between the WO cycle or the WO cycle and the SS cycle

[0266] - WO offset or offset from the position of a specific SS index

[0267] - SS to WO mapping ratio and / or L_max and / or L_act

[0268] - The time axis section occupied by WO

[0269] - WO spacing related parameters

[0270] - Number of UL WUS sequences corresponding to one SS index (=N_WUS)

[0271] - Information about the UL WUS sequences that make up each WO (e.g., root sequence index, CS index, etc.)

[0272] - SS power and / or power step and / or maximum WUS retransmission counter and / or maximum power ramping counter

[0273] Some / all of the above parameters may be defined in advance as specific values. Alternatively, several candidate values ​​may be defined in advance for some / all of the above parameters, and one of the values ​​may be determined based on the cell index / TRP index / UE index (e.g., modulo operation, etc.).

[0274] Alternatively, several candidate values ​​may be defined in advance for some / all of the above parameters, and one of the values ​​may be signaled by SS / SI-0 (or a reference signal transmitted to SS or SI-0). In this case, when a specific value is signaled, the corresponding value for each individual parameter may be individually signaled, or may be signaled through joint encoding. As an example of joint encoding, some / all of the above parameters may be grouped into one combination, and multiple combinations may be tabulated, and then one combination may be set through SS / SI-0 (or a reference signal transmitted to SS or SI-0).

[0275] For example, if {the time axis interval occupied by WO, the number of UL WUS sequences corresponding to one SS index} is grouped and index #0 = {12 symbols, N_WUS=1}, index #1 = {4 symbols, N_WUS=2} is defined, setting index #0 can signal that the time occupied by WO is 12 symbols and the number of UL WUS sequences corresponding to one SS index is 1.

[0276] As another example, some / all of the above parameters can be divided into multiple groups (for example, the 1st / 2nd / 3rd parameters can be divided into group #1, the 4th / 5th / 6th / 7th parameters can be divided into group #2), multiple combinations can be tabulated for each group, and then one combination can be set for each group through SS / SI-0 (or a reference signal transmitted to SS or SI-0).

[0277] Meanwhile, other information that can be transmitted via SI-0 (e.g., time information such as SFN (system frame number) / HFI (half frame indicator) / SSB index, PRB grid information such as subcarrier offset, subcarrier spacing for PDCCH reception scheduling SIB1 PDSCH / CORESET / Type0-PDCCH CSS set information, DMRS Type A location information, cell barring information, etc.) and some / all of the above parameters for UL WUS configuration can be configured as a single combination, and after tabulating multiple combinations, one combination can be configured via SS / SI-0 (or a reference signal transmitted to SS or SI-0).

[0278] The base station can set information about the UL WUS sequence resources described above.

[0279]

[0280] (5) Extension to UL WUS setup method for SI-0 requests

[0281] The contents proposed in (1) to (4) above are about a method for receiving UL WUS configuration information for requesting SI-1 and requesting SI-1 in a state where a terminal has received SS and SI-0 of a specific cell. As an extension of the methods, a method for receiving UL WUS configuration information for requesting SI-0 and requesting SI-0 in a state where a terminal has received SS of a specific cell may be considered. For example, frequency resources of UL WUS may be determined based on SS resources. In addition, values ​​of most parameters required for UL WUS configuration are defined in advance, and only signaling for a minimum number of parameters may be signaled by SS (or a reference signal transmitted to SS).

[0282] Meanwhile, in order to configure the time resources of UL WUS, it may be necessary to acquire some information such as frame boundary or SFN through SS reception alone. Therefore, in order to support the operation of requesting SI-0 while the UE has received SS of a specific cell, information such as SS / beam index / frame boundary / some SFN values ​​may need to be provided by SS (or reference signal transmitted to SS).

[0283]

[0284] FIG. 17 is a signal flow diagram illustrating an example of transmitting and receiving on-demand SI-1 according to the present disclosure.

[0285] Referring to FIG. 17, in step 1701, the UE can provide information on UL WUS resources for each SS index by receiving SS / SI-0 transmitted from the corresponding cell. In addition, as in step 1702, the UE can select a UL WUS corresponding to a specific SS index based on the reception quality for the corresponding SS index, and as in step 1703, the UE can transmit a UL WUS to trigger SI-1 transmission to the base station. The base station that successfully receives the UL WUS can initiate SI-1 transmission on the corresponding cell in step 1704.

[0286] FIG. 18 is a flowchart illustrating an example in which a UE requests on-demand SI-1 according to the present disclosure.

[0287] Referring to FIG. 18, in step A05, the UE receives a plurality of synchronization signal blocks from the base station through the serving cell and selects one synchronization signal block. Each of the plurality of synchronization signal blocks includes a synchronization signal and first system information.

[0288] Next, in step A10, the UE determines a WO (WUS Occasion) for UL WUS (Wake Up Signal) transmission based on a synchronization signal included in the selected one synchronization signal block. In particular, frequency resources and time resources of the WO are determined based on the synchronization signal included in the selected synchronization signal block or first system information included in the at least one selected synchronization signal block.

[0289] Specifically, the UE selects one of the plurality of WOs associated with the plurality of synchronization signal blocks as the WO for the UL WUS transmission. In particular, the first system information may include information about the plurality of WOs. In addition, the UE may determine the frequency resource of the WO for the uplink WUS transmission based on at least one of the lowest subcarrier index, the highest subcarrier index, and the center frequency of the synchronization signal included in the selected synchronization signal block.

[0290] Finally, in step A15, the UE transmits the UL WUS to the base station through the serving cell, requesting transmission of second system information on the determined WO. Based on this, the UE can receive the second system information from the base station through the serving cell in response to the uplink WUS.

[0291] FIG. 19 is a flowchart illustrating an example of a base station receiving an UL WUS requesting on-demand SI-1 according to the present disclosure.

[0292] Referring to FIG. 19, the base station transmits a plurality of synchronization signal blocks to a UE (User Equipment) through a serving cell in step B05. Each of the plurality of synchronization signal blocks may include a synchronization signal and first system information.

[0293] Next, in step B10, the base station receives an UL WUS (Wake Up Signal) from the UE through the serving cell to request transmission of second system information on a WO (WUS Occasion). In particular, the WO on which the UL WUS is received is determined based on a synchronization signal included in at least one synchronization signal block among the plurality of synchronization signal blocks.

[0294] Based on this, the base station can transmit the second system information to the UE through the serving cell in response to the UL WUS.

[0295]

[0296] According to the present disclosure, minimizing periodic signal transmissions when a base station does not transmit downlink data or does not receive uplink data can help save energy. To this end, an operation may be introduced in which the base station performs SI-1 transmission only when requested by a terminal for SI-1 transmission. From the terminal's perspective, resource configuration information for UL WUS to trigger SI-1 transmission of the base station after receiving SS / SI-0 from the corresponding cell is required. The present disclosure proposes a UL WUS resource configuration method, thereby supporting an operation in which the base station does not need to periodically transmit SI-1, thereby achieving energy savings for the base station.

[0297]

[0298] 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.

[0299] 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.

[0300] 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.

[0301] 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 plurality of synchronization signal blocks from a base station through a serving cell, wherein each of the plurality of synchronization signal blocks includes a synchronization signal and first system information; A step of selecting at least one synchronization signal block among the plurality of synchronization signal blocks; A step of determining a WO (WUS Occasion) for uplink WUS (Wake Up Signal) transmission based on a synchronization signal included in at least one synchronization signal block; and A step of transmitting the uplink WUS to the base station through the serving cell to request transmission of the second system information on the determined WO, method.

2. In paragraph 1, Further comprising a step of receiving the second system information in response to the uplink WUS from the base station through the serving cell. method.

3. In paragraph 1, The frequency resource and time resource of the WO are determined based on the synchronization signal included in the at least one synchronization signal block or the first system information included in the at least one selected synchronization signal block. method.

4. In paragraph 1, The time resources of the above WO are: Determined based on the reception time of the synchronization signal included in at least one synchronization signal block or the relative reception time based on the SFN (System Frame Number), method.

5. In paragraph 1, The step of determining the WO for the above uplink WUS transmission is as follows: A step of selecting one of a plurality of WOs associated with the plurality of synchronization signal blocks as a WO for the uplink WUS transmission, The above first system information is, Containing information about the above plurality of WOs, method.

6. In paragraph 1, The step of determining the WO for the above uplink WUS transmission is as follows: A step of determining a frequency resource of a WO for the uplink WUS transmission based on at least one of a lowest subcarrier index, a highest subcarrier index, and a center frequency of a synchronization signal included in at least one synchronization signal block, method.

7. In paragraph 1, The above first system information includes a PBCH (Physical Broadcast Channel), The above second system information includes SIB1 (System Information Block 1). method.

8. 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 plurality of synchronization signal blocks from a base station through a serving cell, wherein each of the plurality of synchronization signal blocks includes a synchronization signal and first system information; A step of selecting at least one synchronization signal block among the plurality of synchronization signal blocks; A step of determining a WO (WUS Occasion) for uplink WUS (Wake Up Signal) transmission based on a synchronization signal included in at least one synchronization signal block; and A step of transmitting the uplink WUS to the base station through the serving cell to request transmission of the second system information on the determined WO, UE.

9. In paragraph 8, The above actions are, Further comprising a step of receiving the second system information in response to the uplink WUS from the base station through the serving cell. UE.

10. In paragraph 8, The frequency resource and time resource of the WO are determined based on the synchronization signal included in the at least one synchronization signal block or the first system information included in the at least one selected synchronization signal block. UE.

11. In paragraph 8, The time resources of the above WO are: Determined based on the reception time of the synchronization signal included in at least one synchronization signal block or the relative reception time based on the SFN (System Frame Number), UE.

12. In paragraph 8, The step of determining the WO for the above uplink WUS transmission is as follows: A step of selecting one of a plurality of WOs associated with the plurality of synchronization signal blocks as a WO for the uplink WUS transmission, The above first system information is, Containing information about the above plurality of WOs, UE.

13. In paragraph 8, The step of determining the WO for the above uplink WUS transmission is as follows: A step of determining a frequency resource of a WO for the uplink WUS transmission based on at least one of a lowest subcarrier index, a highest subcarrier index, and a center frequency of a synchronization signal included in at least one synchronization signal block, UE.

14. In paragraph 8, The above first system information includes a PBCH (Physical Broadcast Channel), The above second system information includes SIB1 (System Information Block 1). UE.

15. 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 plurality of synchronization signal blocks from a base station through a serving cell, wherein each of the plurality of synchronization signal blocks includes a synchronization signal and first system information; A step of selecting at least one synchronization signal block among the plurality of synchronization signal blocks; A step of determining a WO (WUS Occasion) for uplink WUS (Wake Up Signal) transmission based on a synchronization signal included in at least one synchronization signal block; and A step of transmitting the uplink WUS to the base station through the serving cell to request transmission of the second system information on the determined WO, Processing unit.

16. 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 plurality of synchronization signal blocks from a base station through a serving cell, wherein each of the plurality of synchronization signal blocks includes a synchronization signal and first system information; A step of selecting at least one synchronization signal block among the plurality of synchronization signal blocks; A step of determining a WO (WUS Occasion) for uplink WUS (Wake Up Signal) transmission based on a synchronization signal included in at least one synchronization signal block; and A step of transmitting the uplink WUS to the base station through the serving cell to request transmission of the second system information on the determined WO, Storage medium.

17. In a method performed by a base station, A step of transmitting a plurality of synchronization signal blocks through a serving cell to a UE (User Equipment), wherein each of the plurality of synchronization signal blocks includes a synchronization signal and first system information; and A step of receiving an uplink WUS (Wake Up Signal) for requesting transmission of second system information on a WO (WUS Occasion) from the UE through the serving cell, The WO in which the above uplink WUS is received is determined based on a synchronization signal included in at least one synchronization signal block among the plurality of synchronization signal blocks. method.

18. 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 transmitting a plurality of synchronization signal blocks through a serving cell to a UE (User Equipment), wherein each of the plurality of synchronization signal blocks includes a synchronization signal and first system information; and A step of receiving an uplink WUS (Wake Up Signal) for requesting transmission of second system information on a WO (WUS Occasion) from the UE through the serving cell, The WO in which the above uplink WUS is received is determined based on a synchronization signal included in at least one synchronization signal block among the plurality of synchronization signal blocks. Base station.

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