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

Abstract

Disclosed is, in relation to WUS transmission and reception, a criterion for PDCCH monitoring or CSI reporting when a cell DTX active period and a DRX active time of a user equipment partially overlap. Specifically, when a part of the DRX active time of the user equipment is a cell DTX active period and the remaining part is a cell DTX inactive period, operations for the respective periods are defined.

Description

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

[0001] This specification relates to methods and devices used in wireless communication systems.

[0002] Wireless communication systems are being widely deployed to provide various types of communication services, such as voice and data. Generally, a wireless communication system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.). Examples of multiple access systems include 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).

[0003] The technical problem to be solved by the present specification is to provide a method for efficiently transmitting and receiving wireless communication signals and an apparatus for doing so.

[0004] The technical challenges are not limited to those described above, and other technical challenges can be inferred from the embodiments.

[0005] The present specification provides a method and apparatus for transmitting and receiving signals in a wireless communication system.

[0006] In one aspect of the present specification, a method is provided comprising: receiving first configuration information for cell DTX (Discontinuous Transmission) / DRX (Discontinuous Reception) and receiving second configuration information related to the DRX active time of a terminal; and receiving a WUS (Wake-Up Signal) related to the DRX active time of the terminal; wherein communication is performed in the overlapping time interval based on the fact that the cell DTX active period based on the first configuration information overlaps with the DRX active time based on the second configuration information in the time interval.

[0007] In another aspect of the present specification, a device for performing the method comprises a terminal, a processor, and a storage medium.

[0008] In another aspect of the present specification, a method is provided comprising: a step of transmitting first configuration information for cell DTX (Discontinuous Transmission) / DRX (Discontinuous Reception) and a step of transmitting second configuration information related to the DRX active time of a terminal; and a step of transmitting a WUS (Wake-Up Signal) related to the DRX active time of the terminal; wherein communication is performed in the overlapping time interval based on the fact that the cell DTX active period based on the first configuration information overlaps with the DRX active time based on the second configuration information in the time interval.

[0009] In another aspect of the present specification, a base station, a processor, and a storage medium are provided as an apparatus for performing the method.

[0010] The above devices may include at least a terminal, a network, and an autonomous vehicle capable of communicating with other autonomous vehicles other than the device.

[0011] The embodiments of this specification described above are merely some of the preferred embodiments of this specification, and various embodiments reflecting the technical features can be derived and understood by those skilled in the art based on the detailed description.

[0012] According to one embodiment of the present specification, when a signal is transmitted and received between communication devices, there is an advantage that more efficient signal transmission and reception can be performed through an operation differentiated from the prior art.

[0013] The technical effects are not limited to those described above, and other technical effects may be inferred from the examples.

[0014] FIG. 1 illustrates an exemplary flexible network topology to which some of the examples of the present specification may be applied.

[0015] FIG. 2 illustrates an example of a communication system applicable to the present disclosure.

[0016] FIG. 3 illustrates an example of a wireless device that can be applied to the present disclosure.

[0017] FIG. 4 illustrates a communication procedure between a first node (e.g., terminal) and a second node (e.g., base station) applicable to the present disclosure.

[0018] FIGS. 5 to 21 are drawings for explaining a signal transmission and reception method according to an embodiment of the present disclosure.

[0019] In this specification, "A or B" may mean "only A," "only B," or "both A and B." Alternatively, in this specification, "A or B" may be interpreted as "A and / or B." For example, in this specification, "A, B or C" may mean "only A," "only B," "only C," or "any combination of A, B and C."

[0020] A slash ( / ) or a comma used in this specification may mean "and / or." For example, "A / B" may mean "A and / or B." Accordingly, "A / B" may mean "only A," "only B," or "both A and B." For example, "A, B, C" may mean "A, B or C."

[0021] 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 as synonymous with "at least one of A and B."

[0022] Additionally, in this specification, "at least one of A, B and C" may mean "only A," "only B," "only C," or "any combination of A, B and C." Also, "at least one of A, B or C" or "at least one of A, B and / or C" may mean "at least one of A, B and C."

[0023] Additionally, parentheses used in this specification may mean "for example." Specifically, when indicated as "control information (ABC)," "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." Also, when indicated as "control information (i.e., ABC)," "ABC" may be described as an example of "control information."

[0024] In addition, terms such as "first," "second," etc. in this specification are used solely for the purpose of distinguishing one component from another and are not used to limit the components, nor are they used to limit the order or importance of 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 likewise, a second component in one embodiment may be referred to as a first component in another embodiment.

[0025] In the following explanation, 'when, if, in case of' can be replaced with 'based on'.

[0026] Technical features described individually within a single drawing in this specification may be implemented individually or simultaneously.

[0027] In this specification, a terminal is a user-side device (user equipment, UE) or a consumer-side device, and may also be referred to as a first node that receives / transmits signals from / to a base station / second node / IAB node / Transmission-Reception Point (TRP). A terminal may correspond to a physical node or a logical node. A terminal may correspond to a user-side endpoint or an intermediate point between other endpoints. In communication between two points 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 fixed-location node or a non-fixed-location (or mobile) node.

[0028] In this specification, a Base Station (BS) is a device on the network side and may also be referred to as a second node / IAB node / x-NodeB (x-NodeB, where x may be an abbreviation related to Radio Access Technology (RAT)) / Transmission-Reception Point (TRP). A Base Station may correspond to a physical node or a logical node. A Base Station may correspond to an endpoint on the network side or an intermediate point between other endpoints. In communication between two points not limited to endpoints (including one-to-one / many-to-one / one-to-many / many-to-many communication), a Base Station may correspond to a serving node. A Base Station may be a node with a fixed location or a node with an indefinite location.

[0029] In this specification, higher layer parameters may be set for the terminal, pre-set, or pre-defined. For example, a base station may transmit higher layer parameters to the terminal. For example, the terminal may transmit parameters such as capability to the base station as higher layer parameters. For example, higher layer parameters may be transmitted via RRC (radio resource control) signaling or MAC (medium access control) signaling.

[0030] In this specification, information / state / parameters being "configured" or "pre-configured" may be interpreted as the information / state / parameters being provided / pre-provided to the terminal through pre-defined signaling (e.g., SIB, MAC, RRC) from the base station. In this specification, information / state / parameters being "defined" or "pre-defined" may be interpreted as being known or stored in advance by the base station and the terminal without signaling between the base station and the terminal.

[0031] 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.

[0032] The technology described in this specification can be implemented as 6G wireless technology and applied to various 6G systems. For example, 6G systems may have key factors such as eMBB (enhanced mobile broadband), URLLC (ultra-reliable low latency communications), mMTC (massive machine-type communication), AI (artificial intelligence) integrated communication, tactile internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0033] In a wireless communication system, a terminal receives information from a base station via the downlink (DL) and transmits information to the base station via the uplink (UL). The information transmitted and received by the base station and the terminal includes data and various control information, and various physical channels and signals exist depending on the type and purpose of the information being transmitted and received. A physical channel corresponds to a set of resource elements (REs) that carry information originating from the upper layer. A physical signal corresponds to a set of resource elements (REs) used by the physical layer (PHY), but it does not carry information originating from the upper layer. The upper layer includes the MAC (Medium Access Control) layer, RLC (Radio Link Control) layer, PDCP (Packet Data Convergence Protocol) layer, RRC (Radio Resource Control) layer, etc.

[0034] DL physical channels include PBCH (Physical Broadcast Channel), PDSCH (Physical Downlink Shared Channel), and PDCCH (Physical Downlink Control Channel). DL physical signals include DL RS (Reference Signal), PSS (Primary Synchronization Signal), and SSS (Secondary Synchronization Signal). DL RS includes DM-RS (Demodulation RS), PT-RS (Phase-tracking RS), and CSI-RS (Channel-state Information RS). UL physical channels include PRACH (Physical Random Access Channel), PUSCH (Physical Uplink Shared Channel), and PUCCH (Physical Uplink Control Channel). UL physical signals include UL RS. UL RS includes DM-RS, PT-RS, and SRS (Sounding RS).

[0035] FIG. 1 illustrates an exemplary flexible network topology to which some of the examples of the present specification may be applied.

[0036] To compensate for incomplete areas of network coverage, a network topology in which the Split Radio Access Network (RAN) is configured more flexibly and resiliently may be considered. To this end, various nodes such as IAB nodes, relays, and RF repeaters, as exemplified in Fig. 1, may be applied, and NTN 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, and 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 performs simple signal amplification and forwarding functions, and in the case of a network-controlled repeater, it may adjust transmit / receive settings based on information provided by the network as well as signal amplification and forwarding. For example, an NTN node may correspond to a satellite or aircraft that provides NTN coverage that is difficult for a terrestrial network to provide. In addition to these examples, various intermediate points can be introduced to improve network topology.

[0037] Referring to FIG. 1, a split RAN can support the division of a base station into one centralized unit (CU) and one or more distributed units (DU). The CU and DU may correspond to logical units. The CU may 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 DU, various intermediate points may be introduced to compensate for this.

[0038] An intermediate point may correspond to a terminal or a base station depending on its relative relationship with other nodes. For example, an IAB node may include a mobile-termination (MT) portion and a DU. The MT can connect the IAB node to a donor node. The DU of the IAB node may serve other terminals or connect to other IAB nodes to provide multi-hop wireless backhaul to terminals. In other words, an IAB node may correspond to a base station in its relative relationship with user-side nodes and to a terminal in its relative relationship with network-side nodes.

[0039] In some examples of this specification, the description of a terminal may apply equally to an intermediate point corresponding to a terminal in relation to a network-side endpoint as well as to a user-side endpoint. Similarly, in some examples of this specification, the description of a base station may apply equally to an intermediate point corresponding to a base station in relation to a user-side endpoint as well as to a network-side endpoint. However, in most cases where there is no additional description of the operation of three or more entities, the communication entities in this specification are briefly described by the term terminal and / or base station (or first node and / or second node), wherein the term terminal and / or base station (or first node and / or second node) is interpreted to include or replace any endpoint or any intermediate point in relation to other nodes.

[0040] That is, for the sake of brevity of description in some examples of this specification, the subject of the operation may be referred to as a base station and / or terminal (or a first node and / or a second node). Additionally, the term base station and / or terminal (or a first node and / or a second node) may be interpreted or substituted as in the following examples: for example, the base station (or the first node) and the terminal (or the second node) may correspond to a first endpoint and a second endpoint, respectively; may correspond to an endpoint and an intermediate point, respectively; may correspond to an intermediate point and an endpoint, respectively; or may correspond to a first intermediate point and a second intermediate point, respectively.

[0041] In this specification, there may be no intermediate points between the base station and the terminal, or there may be one or more. If intermediate points exist, the intermediate points may correspond to IAB nodes, relays, RF repeaters, NTN (non-terrestrial network) nodes, or nodes supporting other functions. The intermediate points may be nodes with a fixed location or nodes with an indefinite location.

[0042] FIG. 2 illustrates a communication system applicable to the present disclosure.

[0043] 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 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 Thing) device (110f), and an AI (artificial intelligence) device / server (110g). For example, the vehicle may include a vehicle equipped with wireless communication capabilities, an autonomous vehicle, a vehicle capable of performing inter-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, digital signage, a vehicle, a robot, etc. The portable device (110d) may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch, smart glasses), a computer (e.g., a laptop, 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 a 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 operate as a network device (120) to another wireless device (110).

[0044] Wireless devices (110a to 110f) can be connected to a network (130) through a network device (120). AI technology may be applied to the wireless devices (110a to 110f), and the wireless devices (110a to 110f) can be connected to an AI server (110g) through the network (130). The network (130) can be configured using a 3G network, a 4G (e.g., LTE) network, a 5G (e.g., NR) network, or a 6G network. The wireless devices (110a to 110f) may communicate with each other through the network device (120) / network (130), but may 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). Also, an IoT device (110f) (e.g., a sensor) can communicate directly with another IoT device (e.g., a sensor) or other wireless devices (110a to 110f).

[0045] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (110a to 110f) / network devices (120) and between network devices (120). Here, 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 wireless communication / connection (150a, 150b, 150c), wireless devices and network devices / wireless devices, and network devices and network devices can transmit / receive wireless signals to / from each other. For example, wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, based on the various descriptions of the present disclosure, at least some of the following may be performed: a process for setting various configuration information for the transmission / reception of a wireless signal, a process for various signal processing (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), a resource allocation process, etc.

[0046] FIG. 3 illustrates an example of a wireless device that can be applied to the present disclosure.

[0047] Referring to FIG. 3, the wireless device (200) can transmit and receive wireless signals through 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).

[0048] 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 sequences of operation disclosed in this document. For example, the processor (202) may process information within the memory (204) to generate a first information / signal and then transmit a wireless signal containing the first information / signal through the transceiver (206). Additionally, the processor (202) may receive a wireless signal containing a second information / signal through the transceiver (206) and then store information obtained from the 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, memory (204) may store software code containing 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 sequences of operations disclosed in this document. Here, the processor (202) and memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology. A transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals through at least one antenna (208). The transceiver (206) may include a transmitter and / or receiver. The transceiver (206) may be interchangeable with an RF (radio frequency) unit. In this disclosure, a wireless device may mean a communication modem / circuit / chip.

[0049] Hereinafter, 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., functional layers such as PHY (physical), MAC (media access control), RLC (radio link control), PDCP (packet data convergence protocol), RRC (radio resource control), and SDAP (service data adaptation protocol). At least one processor (202) may generate at least one PDU (Protocol Data Unit) and / or at least one SDU (service data unit) according to the descriptions, functions, procedures, proposals, methods and / or operation sequences disclosed in this document. At least one processor (202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods and / or operation sequences disclosed in this document. At least one processor (202) may generate a signal (e.g., baseband signal) including a PDU, SDU, message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this document and provide it to at least one transceiver (206). At least one processor (202) may receive a signal (e.g., baseband signal) from at least one transceiver (206) and may obtain a PDU, SDU, message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation sequences disclosed in this document.

[0050] At least one processor (202) may be referred to as a controller, microcontroller, microprocessor, or microcomputer. 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 at least one processor (202). The descriptions, functions, procedures, proposals, methods, and / or operation sequences 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. Firmware or software configured to perform the descriptions, functions, procedures, proposals, methods, and / or operation sequences disclosed in this document may be included in at least one processor (202) or stored in at least one memory (204) and driven by at least one processor (202). The descriptions, functions, procedures, proposals, 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.

[0051] At least one memory (204) may be connected to at least one processor (202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. At least one memory (204) may be composed of ROM (read-only memory), RAM (random access memory), EPROM (erasable programmable read-only memory), flash memory, hard drive, registers, cache memory, computer read storage media, and / or combinations thereof. At least one memory (204) may be located inside and / or outside of at least one processor (202). Additionally, at least one memory (204) may be connected to at least one processor (202) via various technologies, such as wired or wireless connections.

[0052] At least one transceiver (206) may transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or operation flowcharts, etc. of this document to at least one other device. At least one transceiver (206) may receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or operation flowcharts, etc. disclosed in this document from at least one other device. For example, at least one transceiver (206) may be connected to at least one processor (202) and may transmit and receive wireless signals. For example, at least one processor (202) may control at least one transceiver (206) to transmit user data, control information, or wireless signals to at least one other device. Additionally, at least one processor (202) may control at least one transceiver (206) to receive user data, control information, or wireless signals from at least one other device. Additionally, 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., as described in the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams 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).To this end, at least one transceiver (206) may include an (analog) oscillator and / or filter.

[0053] The components of the wireless device described with reference to FIG. 3 may be referred to by other terms in terms of their function. For example, the processor (202) may be referred to as the control unit, the transceiver (206) as the communication unit, and the memory (204) as the storage unit. In some cases, the communication unit may be used to mean at least a part of the processor (202) and the transceiver (206).

[0054] The structure of the wireless device described with reference to FIG. 3 can be understood as the structure of at least part of various devices. For example, the structure of the wireless device illustrated in FIG. 3 may be at least part of the various devices described with reference to FIG. 2 (e.g., robot (110a), vehicle (110b-1, 110b-2), XR device (110c), portable device (110d), home appliance (110e), IoT device (110f), AI device / server (110g)). Furthermore, according to various embodiments, the device may include other components in addition to the components illustrated in FIG. 3.

[0055] For example, the device may be a portable device such as a smartphone, smartpad, wearable device (e.g., smart watch, smart glasses), or portable computer (e.g., 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., audio input / output port, video input / output port), and an input / output unit for inputting and outputting video information / signals, audio information / signals, data, and / or information input by a user.

[0056] For example, the device may be a mobile device such as a mobile robot, vehicle, train, manned / unmanned aerial vehicle (AV), or ship. In this case, the device may further include at least one of a drive unit comprising at least one of an engine, motor, power train, wheel, brake, and steering device of the device; a power supply unit that supplies power and includes a wired / wireless charging circuit, battery, etc.; a sensor unit that senses state 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 acquires position information of the moving body through a GPS (global positioning system) and various sensors.

[0057] For example, the device may be an XR device such as an HMD, a HUD (head-up display) equipped in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, 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 acquires control information, data, etc. from the outside and outputs a generated XR object, and a sensor unit that senses state information, environment information, and user information of the device or the surroundings of the device.

[0058] For example, the device may be a robot that can be classified into industrial, medical, household, military, etc., 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 state information, environmental information, and user information of the device or its surroundings, and a drive unit that performs various physical actions, such as moving robot joints.

[0059] For example, the device may be an AI device such as a TV, projector, smartphone, PC, laptop, digital broadcasting terminal, tablet PC, wearable device, set-top box (STB), radio, washing machine, refrigerator, digital signage, robot, 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 state information, environmental information, and user information of the device or its surroundings, and a training unit that learns a model composed of an artificial neural network using training data.

[0060] The structure of the wireless device exemplified in FIG. 3 may be understood as part of a terminal (or first node), or part of an intermediate point, or part of a base station (or second node). If the device exemplified 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 communication. However, if the front haul and / or back haul communication is based on wireless communication, at least one transceiver (206) exemplified in FIG. 3 is used for front haul and / or back haul communication, and the wired transceiver may not be included.

[0061] 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.

[0062] The second node of FIG. 4 supports dynamic spectrum sharing (DSS) and can provide connectivity to both nodes where 6G technology is implemented and nodes where pre-6G wireless communication technology (e.g., 5G, 4G) is implemented. That is, the first node of FIG. 4 may have 6G technology implemented or pre-6G wireless communication technology (e.g., 5G, 4G) implemented. Additionally, the first node and / or the second node may support full duplex mode as well as non-overlapping full duplex mode.

[0063] 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 the operation of the terminal (110) and the base station (120) transmitting and / or receiving data, and the operation performed prior to this, are illustrated. However, the operation of FIG. 4 is not limited to the operation between the terminal and the base station, but can be interpreted as the operation between the first node and the second node. Additionally, FIG. 4 illustrates the operation of direct transmission and reception of wireless signals between the terminal (110) and the base station (120), but there may be one or more intermediate points between the terminal (110) and the base station (120), and wireless signals may be transmitted and received via one or more intermediate points.

[0064] Referring to FIG. 4, the terminal (110) and the base station (120) can perform synchronization (401). For example, the terminal (110) performs an initial cell search operation. Specifically, the terminal (110) can detect a synchronization signal for at least one base station connection transmitted from the base station (120) according to a predefined rule. Here, the synchronization signal may include a plurality of synchronization signals classified according to structure or use (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 identify the boundary of the unit (e.g., frame, subframe, slot and / or symbol) constituting the wireless signal transmission of the base station (120) and obtain information about the base station (120) (e.g., cell identifier).

[0065] The terminal (110) can obtain system information transmitted from the base station (120) (403). System information is information related to the attributes, characteristics, and / or capabilities of the base station (120) required to connect to the base station (120) and use the service, and can be classified according to content (e.g., whether it is essential for connection), transmission structure (e.g., channel used, whether it is provided on-demand), etc., and can be classified, for example, into first system information (e.g., MIB (master information block), primary system information), second system information (e.g., SIB (system information block), secondary system information), etc. If necessary, the terminal (110) may transmit a signal requesting system information prior to receiving the system information. However, the request and provision of system information may be performed after the random access procedure described later.

[0066] A terminal (110) and a base station (120) can perform a random access procedure (405). The terminal (110) can transmit and / or receive at least one message for a random access procedure (e.g., random access preamble, RAR (random access response) message, etc.) based on information related to the channel for the random access procedure of the base station (120) obtained through system information (e.g., channel location, channel structure, structure of supported preamble, etc.). For example, the terminal (110) can transmit a first message (e.g., preamble, MSG1) through the channel for the random access procedure, receive a second message (e.g., RAR message, MSG2), transmit a third message (e.g., MSG3) containing 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 message and the third message can be transmitted and received as a single message, or the second message and the fourth message can be transmitted and received as a single message.

[0067] The terminal (110) and the base station (120) can perform signaling of control information (407). Here, the control information can be defined in various layers, such as a layer that controls the connection (e.g., a radio resource control (RRC) layer), a layer that handles mapping between logical channels and transmission 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) can perform at least one of signaling to establish a connection, signaling to determine settings related to communication, and signaling to indicate allocated resources.

[0068] The terminal (110) and the base station (120) can transmit and / or receive data (409). In other words, the terminal (110) and the base station (120) can process, transmit and / or receive data based on the signaling of 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, antenna-specific waveform demodulation, signal placement considering layer mapping, constellation demapping, descrambling, and channel decoding.

[0069] 6G System Core Technology

[0070] The 6G (wireless communication) system aims for (i) very high data rates per device, (ii) a very large number of connected devices, (iii) global connectivity, (iv) very low latency, (v) reduced energy consumption of battery-free IoT (internet of things) devices, (vi) ultra-reliable connectivity, and (vii) connected intelligence with machine learning capabilities. The vision of the 6G system can be four aspects: intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity.

[0071] As core implementation technologies for 6G systems, 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.

[0072] LP-WUS

[0073] The contents examined above can be applied in combination with the proposed methods described below, or can be supplemented to clarify the technical characteristics of the proposed methods.

[0074] In addition, the methods described below can be applied in the same way to the NR system (licensed band) or shared spectrum described above, and it goes without saying that the technical concept proposed in this specification can be modified or replaced to fit the terms, expressions, structures, etc. defined in each system so that it can be implemented in the system as well.

[0075] In the Rel-18 NR standard, discussions are underway to introduce LP-WUS (low power wake-up signal) and LP-WUR (low power wake-up receiver or low power wake-up radio), a separate receiver capable of receiving it, as a method for reducing power consumption that differs slightly from the terminal power consumption reduction techniques introduced or supported in Rel-16 / 17 and others. When the receiver within the terminal (the receiver in the downlink) in existing NR systems is referred to as MR (Main radio / receiver), LP-WUR refers to a separate receiver (i.e., companion radio / receiver) that can be introduced to reduce the power consumption of the MR. LP-WUR can be simply represented as LR.

[0076] Meanwhile, a separate LP-SS (low power synchronization signal) may be defined and transmitted for time / frequency synchronization required for receiving the LP-WUR transmitted from the LP-WUR. The LP-SS may be a signal / waveform generated according to an OOK or FSK waveform generation method (similar to the LP-WUS), and an overlaid sequence may be applied. The LP-SS may be a signal transmitted periodically or aperiodisically. Based on the LP-SS, the LP-WUR may measure the power of the received signal, etc., to offload or relax the RRM measurement of the MR.

[0077] In the proposal below, the term "occasion" may refer to a transmission occasion (TO) where the base station transmits a signal, or a monitoring occasion (MO) where the receiver (such as an LP-WUR) monitors the signal, depending on the context. Since TO signifies an opportunity for a signal to be transmitted, the signal may not be transmitted at that location (depending on the configuration or the needs of the base station). Since MO signifies an opportunity to monitor the signal, the receiver may not monitor the signal at that location (depending on the configuration or the needs / situations of the base station / terminal). Additionally, for the sake of convenience, even if expressed simply as MO or TO, MO, TO, or MO and TO may be indicated depending on the proposed method and context.

[0078] In the proposal below, setting the opportunity for LP-SS / LP-WUS can be interpreted as setting one or more of the period, starting time, ending time, duration, offset within the period, and the frequency at which the corresponding signal is transmitted.

[0079] Various candidates are being considered for the architecture of LP-WUR, and depending on the architecture adopted, the power consumption of LP-WUR in the on and off states may vary.

[0080] At this time, the power consumption of the LP-WUR in the ON state may be at a level that cannot be ignored, or for other reasons, the terminal may be required to activate or deactivate the LP-WUR. To support this, entry conditions for the terminal to enter the activated state of the LP-WUR and exit conditions for the terminal to exit the activated state may be defined.

[0081] Generally, terminals in RRC_CONNECTED mode (hereinafter referred to as CONNECTED mode or connection mode) consume a significant amount of power for PDDCH monitoring. Since the terminal monitors the PDCCH using MR, the longer the MR remains in a sleep state, the more power the terminal can reduce. To reduce power consumption, DRX operations, WUS (wake-up signal), and PDCCH monitoring adaptation operations have been introduced. All of these operations were introduced to reduce the time the terminal monitors the PDCCH and to guarantee the sleep time of the MR, thereby reducing the terminal's power consumption.

[0082] By utilizing LP-WUS / LP-WUR, the frequency of PDCCH monitoring performed by the terminal's MR can be reduced. Since the terminal's LP-WUR operates at relatively low power, it consumes less power compared to MR. A terminal in CONNECTED mode can reduce power consumption by operating the MR in a (deep / light / micro) sleep state, thereby not performing PDCCH monitoring. Additionally, if the terminal receives LP-WUS via LR and wakes up the MR based on the instructions in the received signal, the MR's sleep time can be extended. Furthermore, the terminal can receive other instructions via LP-WUS and operate the MR accordingly. For example, the terminal can receive instructions via LP-WUS to temporarily switch the MR to a sleep state.

[0083] When the terminal's PDCCH monitoring status is indicated via LP-WUS, the frequency of PDCCH monitoring performed by the terminal's MR can be adjusted. For example, when the MR is off or in a sleep state, the terminal receives LP-WUS using LP-WUR. The terminal activates the MR to perform PDCCH monitoring only when the correct LP-WUS is received. By triggering the operation of the MR via LP-WUS, unnecessary PDCCH monitoring is reduced. Lowering the frequency of PDCCH monitoring can reduce the terminal's power consumption.

[0084] LP-WUS is modulated with OOK (On-Off Keying) to align with the slot or symbol structure of the time axis, but can be transmitted without aligning with the RE structure of the frequency axis. LP-WUS is configured to have a signal or no signal within a specific time interval, and the terminal can receive the signal simply by energy detection within that specific time interval. A sequence for spectrum flattening may be superimposed on the OOK symbol of the LP-WUS, or an OFDM sequence for extending transmission coverage or transmitting additional information may be superimposed.

[0085] Meanwhile, the LP-WUS signal may be used in conjunction with the OOK waveform with an overlaid sequence. Depending on how the overlaid sequence is overlaid on each OOK signal or OFDM signal, it may affect the LP-WUS transmission time and / or the frequency resources occupied by the LP-WUS. Additionally, if information is transmitted through the overlaid sequence, this may serve as a method to expand the utilization of the LP-WUS signal. However, not all LP-WUSs can detect / decode the overlaid sequence. If the overlaid sequence modulates each subcarrier in the frequency domain, only LP-WUSs possessing Fast Fourier Transform (FFT) and / or frequency domain sequence correlation capabilities can receive the overlaid sequence. Even if the sequence is overlaid on each OOK symbol or OFDM symbol in the time domain, only LP-WUSes possessing time domain sequence correlation capabilities can receive the sequence. Since the LP-WUR of the lowest complexity may only distinguish between ON / OFF of OOK symbols, the overlaid sequence needs to be designed to take these various types of LP-WURs into account.

[0086] A WUR capable of only energy detection can be defined as LP-WUR Type 1, and a WUR capable of sequence detection can be defined as LP-WUR Type 2. LP-WUR Type 1 is configured at a low cost and can receive only information transmitted through the payload of OOK symbols. LP-WUR Type 2 is configured at a higher cost than LP-WUR Type 1 and can detect an overlaid OFDM sequence in addition to the payload of OOK symbols. LP-WUR Type 2 can also receive PSS / SSS, which are signals related to MR.

[0087] The operation of a terminal triggering PDCCH monitoring based on a received LP-WUS can be implemented in various ways. An example of a method for triggering PDCCH monitoring by LP-WUS for a terminal configured with C-DRX (Connected mode discontinuous reception) is as follows.

[0088] Example 1) The terminal may receive LP-WUS in a time interval preceding the start time of the periodically configured drx-onDurationTimer to be instructed on whether to start the drx-onDurationTimer. (This may be an operation that replaces the DCP.)

[0089] Example 2) The terminal can receive LP-WUS outside of the existing C-DRX active time to be instructed to an additional potential PDCCH monitoring period in addition to the existing periodic drx-onDurationTimer.

[0090] Example 1 can be understood as an operation where LP-WUS replaces the wake-up indication of DCP. For example, when LP-WUS is received instead of the existing DCI format 2_6, it may indicate whether to start the periodically configured drx-onDurationTimer. During periods when there is no potential DRX active time, the terminal keeps the MR in a sleep state to reduce power consumption and operates LP-WUR to receive the LP-WUS. Based on the reception of LP-WUS, the start of drx-onDurationTimer may be determined according to the preset DRX operation.

[0091] Example 2 may be an operation in which the LP-WUS is received outside the existing C-DRX active time, thereby indicating an additional potential PDCCH monitoring period. This may be an operation in which the terminal's PDCCH monitoring operation is always indicated solely by the LP-WUS, regardless of the DRX configured on the terminal. The PDCCH monitoring operation may be performed within the time interval in which the new timer introduced for the operation of Example 2 is in operation. Therefore, the new timer may refer to a timer capable of starting a non-periodic DRX active time that can be initiated by the instruction of the LP-WUS. Even if the existing periodic drx-onDurationTimer is started, PDCCH monitoring may not be performed by the terminal without an instruction from the LP-WUS. The terminal may perform only the operations that can be performed during the other DRX active time, in accordance with the current standard. The operations that can be performed may include measurement and reporting.

[0092] In addition, Example 2 can also be considered as the operation when periodic C-DRX is not configured on the terminal. Without a pre-configured reception interval to start or not start at regular intervals, the terminal may be instructed by the LP-WUS to perform PDCCH monitoring with MR only.

[0093] Generally, the DRX active time may refer to the period during which PDCCH monitoring is performed by operating a related timer by the terminal. As in the example operation above, PDCCH monitoring may be performed within the time interval during which a specific timer is operating. The specific timer may include DRX timers such as drx-onDurationTimer and a new timer. Therefore, in the operation within the proposed method, the start time of PDCCH monitoring may refer to the start time of the timer. Consequently, the operation in which the start time of PDCCH monitoring is determined through the proposed method may be identical to the operation in which the start time of the timer is determined. Unless otherwise noted, the timer in this specification may refer to a DRX timer or a new timer.

[0094] In this specification, it may be assumed that when PDCCH monitoring of a terminal is triggered by the LP-WUS in a cell where Cell Discontinuous Transmission (Cell DTX) is configured, the DRX active time of said terminal does not completely overlap with the Cell DTX active time. In existing NR standards, the DRX active times of terminals may be configured to be located within the Cell DTX active time. However, the DRX active time of all terminals is not necessarily restricted to being configured only within the Cell DTX active time. Furthermore, as in the operation of Example 2 above, when a non-periodic DRX active time operation period is directly indicated by the LP-WUS, cases where the DRX active time does not completely overlap with the Cell DTX active time and is misaligned may occur more frequently. For some reason, there may be cases where the DRX active time for a specific terminal is not aligned within the Cell DTX active time period. Therefore, it is necessary to define the terminal operation during the misaligned time period.

[0095] In this specification, two cases may be assumed where the cell DTX active period and the DRX active time indicated by LP-WUS are out of sync. In this specification, a period other than the cell DTX active period may be referred to as the cell DTX inactive period.

[0096] Referring to FIG. 5, the first case in this specification may represent a case where the start time of the DRX active time indicated by the LP-WUS is located in the cell DTX inactive period, but part of the operating period overlaps with the cell DTX active period. FG101 represents the cell DTX active period of the cell, which is the period during which the base station transmits a signal. FG102 represents the operation in which the terminal receives the LP-WUS using LR. Additionally, the terminal triggers MR by confirming the wake-up signal. FG103 represents the period during which the terminal performs PDCCH monitoring via MR based on the reception of the LP-WUS. That is, FG103 may represent the period during which the terminal operates based on the DRX active time.

[0097] Referring to FIG. 6, the second case in this specification represents a case where the start time of the DRX active time indicated by the LP-WUS is located within the cell DTX active period, but part of the operating period overlaps with the cell DTX inactive period. FG201 represents the cell DTX active period of the cell, which is the period during which the base station transmits a signal. FG202 represents the operation in which the terminal receives the LP-WUS using the LP-WUR. Additionally, the terminal triggers MR by confirming the wake-up signal. FG203 represents the period during which the terminal performs PDCCH monitoring via MR based on the reception of the LP-WUS. That is, FG203 may represent the period during which the terminal operates based on the DRX active time.

[0098] LP-WUS and CSI Report

[0099] In the following, a method is proposed for how periodic CSI / L1-RSRP reporting by the terminal is performed when the first case and / or the second case occurs. Unless otherwise stated in the present invention, CSI / L1-RSRP reporting may refer to periodic CSI / L1-RSRP reporting.

[0100] Specifically, when a first case and / or a second case occurs, a time interval during which the terminal performs periodic CSI / L1-RSRP reporting and a method for determining said time interval are proposed.

[0101] In relation to the first case, when the terminal receives instructions via LP-WUS, the terminal may perform periodic CSI / L1-RSRP reporting as follows.

[0102] - Periodic CSI / L1-RSRP reporting can be performed only during the period where the active time and the cell DTX active period overlap.

[0103] - Periodic CSI / L1-RSRP reporting can be performed within the DRX active time regardless of the cell DTX active period.

[0104] - Even if the DRX active time is not triggered, if the time interval given by the relevant timer partially or wholly overlaps with the cell DTX active time interval, periodic CSI / L1-RSRP reporting may be performed during that time interval.

[0105] When the terminal receives instructions via LP-WUS for the second case, the terminal may perform periodic CSI / L1-RSRP reporting as follows.

[0106] - Periodic CSI / L1-RSRP reporting can be performed only in the period where the DRX active time and the cell DTX active time overlap.

[0107] - Periodic CSI / L1-RSRP reporting can be performed within the DRX active time regardless of the cell DTX active period.

[0108] - If periodic CSI / L1-RSRP reporting has been performed within a certain time interval from the triggered DRX active time, the terminal may omit periodic CSI / L1-RSRP reporting within the DRX active time interval.

[0109] Method 1: CSI / L1-RSRP reporting method for a terminal when the start time of the DRX active time indicated via LP-WUS is during the Cell DTX inactive period, but part of the operating period overlaps with the Cell DTX active period.

[0110] Method 1 proposes a method for performing periodic CSI / L1-RSRP reporting when a terminal receives a wake-up instruction via LP-WUS for a first case (where the start time of the DRX active time indicated via LP-WUS is the cell DTX inactive period, but part of the operating period overlaps with the cell DTX active period). The periodic CSI / L1-RSRP reporting of the terminal according to the proposed methods 1-1, 1-2, and 1-3 below may be set or directed by a base station.

[0111] Method 1-1: If the start time of the DRX active time indicated via LP-WUS is the cell DTX inactive period, but a portion of the DRX active time overlaps with the cell DTX active period, the terminal performs periodic CSI / L1-RSRP reporting only during the overlap between the DRX active time and the cell DTX active period.

[0112] When the terminal receives an MR wake-up instruction from the LP-WUS, it may start the DRX active time by operating a timer at a predetermined time. The time at which the terminal starts the timer may correspond to a specific point in time after the preparation time from receiving the LP-WUS and waking up the MR to start the DRX active time. Even if the timer is operated and the DRX active time is in progress, the terminal may not actually perform periodic CSI / L1-RSRP reporting. The terminal may perform periodic CSI / L1-RSRP reporting only during the period in which the timer's operating interval (DRX active time) overlaps with the cell DTX active interval. Therefore, the time at which the terminal actually starts the CSI / L1-RSRP reporting may be the same as the start time of the cell DTX active interval. Subsequently, after the DRX active time ends, the terminal may not perform periodic CSI / L1-RSRP reporting. After that, the terminal may resume the operation of monitoring the LP-WUS using LR.

[0113] The DRX active time may be extended due to the start or restart of related timers. For example, in conventional standards, a new timer that can be started by the onDuration timer or reception by LP-WUS is started for the first time, and if the PDCCH of a new transmission is monitored during the operation of the timer, the inactivity timer is started, and the DRX active time may be extended.

[0114] FIG. 7 is a diagram showing the timing at which the operation proposed in Method 1-1 is performed. Solid arrows indicate cases where CSI / L1-RSRP reporting is actually performed periodically, while dotted arrows indicate cases where the CSI / L1-RSRP reporting period is appropriate but is not actually performed. When the time at which the terminal receives the LP-WUS is denoted as T, the time at which the actual timer is activated to start the DRX active time may be T+t1. As described above, t1 may correspond to the time from when the terminal receives the LP-WUS until it wakes up the MR and starts the DRX active time. The cell DTX active period may begin at time T+t2, and the terminal's DRX active time may end at time T+t3. Therefore, periodic CSI / L1-RSRP reporting may be performed from time T+t2 to time T+t3, i.e., during the period 't3-t2'.

[0115] For example, when the time at which the terminal receives the LP-WUS is used as the reference (T=0), if the start time of the DRX active time is 2ms, the start time of the cell DTX active period is 6ms, and the length of the timer that starts the first DRX is set to 10ms, the terminal can perform periodic CSI / L1-RSRP reporting within a time interval from 6ms to 12ms. At this time, if a PDCCH instructing a new transmission is not received, the DRX active time of the terminal can end at 12ms. If an additional timer (e.g., an inactivity timer) is set to 20ms and the terminal receives a PDCCH instructing a new transmission at 8ms, the inactivity timer starts and can continue up to 28ms. In this case, provided there is no retransmission occurring after the end time of the additional timer, the terminal can perform periodic CSI / L1-RSRP reporting within a time interval from 6ms to 28ms.

[0116] The terminal operation proposed in the above method 1-1 can be defined as follows.

[0117] - The above terminal may not need to perform periodic CSI / L1-RSRP reporting during time intervals when the cell DTX is not active.

[0118] - The above terminal may not be expected to perform periodic CSI / L1-RSRP reporting during time intervals other than the cell DTX active period.

[0119] Method 1-2: If the start time of the DRX active time indicated via LP-WUS is the cell DTX inactive period, but part of the DRX active time overlaps with the cell DTX active period, the terminal performs periodic CSI / L1-RSRP reporting throughout the entire DRX active time period.

[0120] When the terminal receives an MR wake-up instruction via LP-WUS, it may start a DRX active time by operating a timer at a predetermined time. The time at which the terminal starts the timer may correspond to a specific time after the preparation time from receiving the LP-WUS and waking up the MR to starting the DRX active time. Within the indicated DRX active time interval, the terminal may perform periodic CSI / L1-RSRP reporting. Method 1-2 may be a result assuming subsequent signal transmission from the base station, because the terminal's wake-up was indicated via LP-WUS transmission by the base station, even if the reception of the LP-WUS and the start of the DRX active time are located within the cell DTX inactive period. Within the timer's operating interval (DRX active time), the terminal may perform periodic CSI / L1-RSRP reporting regardless of whether it is the cell DTX active period or the inactive period. Therefore, the point at which the terminal actually starts periodic CSI / L1-RSRP reporting may be the same as the start time of the DRX active time. To summarize Method 1-2, even if a portion of the DRX active time is located within the cell DTX inactive period, since the base station has transmitted LP-WUS and there is information that the terminal needs to receive using MR, the operation of the terminal starting periodic CSI / L1-RSRP reporting may be performed. Subsequently, after the DRX active time ends, the terminal may not perform periodic CSI / L1-RSRP reporting. After that, the terminal may start the operation of monitoring LP-WUS again using LR.

[0121] The DRX active time may be extended due to the start or restart of related timers. For example, in the NR standard, if a new timer, which can be started by the onDuration timer or by reception by the LP-WUS, is started for the first time and the PDCCH of a new transmission is monitored while that timer is running, the inactivity timer is started and the DRX active time may be extended.

[0122] FIG. 8 is a diagram showing the time at which the operation proposed in Method 1-2 is performed. When the time at which the terminal receives the LP-WUS is denoted as T, the time at which the actual timer is operated to start the DRX active time may be T+t1. As described above, the t1 may correspond to the time from when the terminal receives the LP-WUS and wakes up the MR to start the DRX active time. The cell DTX active period may start at the time of T+t2, and the DRX active time of the terminal may end at the time of T+t3. Therefore, periodic CSI / L1-RSRP reporting may be performed from the time of T+t1 to the time of T+t3, i.e., during the period of 't3-t1'.

[0123] For example, when the time at which the terminal receives the LP-WUS is used as the reference (T=0), if the start time of the DRX active time is 2ms, the start time of the cell DTX active period is 6ms, and the length of the timer that starts the first DRX is set to 10ms, the terminal can perform periodic CSI / L1-RSRP reporting within a time interval from 2ms to 12ms. At this time, if a PDCCH instructing a new transmission is not received, the DRX active time of the terminal can end at 12ms. If an additional timer (e.g., an inactivity timer) is set to 20ms and the terminal receives a PDCCH instructing a new transmission at 8ms, the inactivity timer can start and continue up to 28ms. In this case, provided there is no retransmission occurring after the end time of the additional timer, the terminal can perform periodic CSI / L1-RSRP reporting within a time interval from 2ms to 28ms.

[0124] The terminal operation proposed in the above method 1-2 can be defined as follows.

[0125] - The above terminal may periodically perform CSI / L1-RSRP reporting during the DRX active time.

[0126] - The above terminal can be expected to periodically perform CSI / L1-RSRP reporting during the DRX active time.

[0127] Method 1-3: If the start time of the DRX active time indicated via LP-WUS is the cell DTX inactive period, but part of the DRX active time overlaps with the cell DTX active period, the terminal starts the DRX active time in alignment with the cell DTX active period and performs periodic CSI / L1-RSRP reporting within the DRX active time.

[0128] When the terminal receives an MR wake-up instruction via LP-WUS, it may start the DRX active time by operating a timer at a set time. However, if the cell DTX active period is not set at the start time of the DRX active time, the terminal may start the DRX active time at the start time of the cell DTX active period. That is, after receiving the instruction from the LP-WUS, the terminal may operate the timer from the start time of the cell DTX active period. This may apply to cases where the cell DTX inactive period begins later than the time set for the terminal to receive the LP-WUS and wake up the MR to start the DRX active time. The terminal may start the DRX active time and periodically perform CSI / L1-RSRP reporting within that time period. This may be an operation where the originally set timer's operating time is maintained during the cell DTX active period, assuming that there will be no signal transmission from the base station during the cell DTX inactive period. The point at which the terminal actually starts periodic CSI / L1-RSRP reporting may be the same as the start of the cell DTX active period. After the DRX active time ends, the terminal may not perform periodic CSI / L1-RSRP reporting. Subsequently, the terminal may start monitoring the LP-WUS again using LR.

[0129] The DRX active time may be extended due to the start or restart of related timers. For example, in conventional standards, a new timer that can be started by the onDuration timer or reception by the LP-WUS is started for the first time, and if the PDCCH of a new transmission is monitored while the timer is operating, the inactivity timer is started and the DRX active time may be extended.

[0130] FIG. 9 is a diagram showing the timing at which the operation proposed in Method 1-3 is performed. Let T be the time at which the terminal receives the LP-WUS. The time at which the actual timer is operated to start the DRX active time may be T+t1. However, since the time at T+t1 is not the cell DTX active period, the terminal may not start the DRX active time. The cell DTX active period begins at the time at T+t2, and at the same time, the terminal may start the DRX active time. The DRX active time of the terminal may end at the time at T+t3. Therefore, periodic CSI / L1-RSRP reporting may be performed from the time at T+t2 to the time at T+t3, i.e., during the period of 't3-t2'.

[0131] For example, when the time at which the terminal receives the LP-WUS is used as the reference (T=0), the start time of the DRX active time is 6ms, which is the same as the start time of the cell DTX active period, and if the length of the timer that starts the first DRX is set to 10ms, the terminal can perform periodic CSI / L1-RSRP reporting within a time interval from 6ms to 16ms. At this time, if a PDCCH instructing a new transmission is not received, the DRX active time of the terminal can end at 16ms. If an additional timer (e.g., an inactivity timer) is set to 20ms and the terminal receives a PDCCH instructing a new transmission at 8ms, the inactivity timer starts and can continue up to 28ms. In this case, provided there is no retransmission occurring after the end time of the additional timer, the terminal can perform periodic CSI / L1-RSRP reporting within a time interval from 6ms to 28ms.

[0132] The terminal operation proposed in the above method 1-3 can be defined as follows.

[0133] - The above terminal may periodically perform CSI / L1-RSRP reporting during the DRX active time.

[0134] - The above terminal can be expected to periodically perform CSI / L1-RSRP reporting during the DRX active time.

[0135] Method 2: Method for monitoring the terminal's PDCCH when the start time of the DRX active time indicated via LP-WUS is during the Cell DTX active period, but part of the operating period overlaps with the Cell DTX inactive period.

[0136] Method 2 proposes a method for performing PDCCH monitoring when a terminal receives instructions via LP-WUS for the second case (where the start time of the DRX active time indicated via LP-WUS is the cell DTX active period, but part of the operating period overlaps with the cell DTX inactive period). The PDCCH monitoring operation of the terminal according to the proposed methods 2-1, 2-2, and 2-3 below may be set or directed by a base station.

[0137] Method 2-1: If the start time of the DRX active time indicated via LP-WUS is the cell DTX active period, but a portion of the DRX active time overlaps with the cell DTX active period, the terminal performs periodic CSI / L1-RSRP reporting only during the overlap between the DRX active time and the cell DTX active period.

[0138] When the terminal receives an MR wake-up instruction from the LP-WUS, it can start the DRX active time by operating a timer at a predetermined time. Since the start time of the DRX active time is located within the cell DTX active period, the terminal can start the DRX active time and periodically perform CSI / L1-RSRP reporting within that time period. Subsequently, the DRX active time continues even after the cell DTX active period ends, and the DRX active time can be terminated outside the cell DTX active period. The terminal can periodically perform CSI / L1-RSRP reporting only during the period where the DRX active time overlaps with the cell DTX active period. Therefore, the point at which the terminal no longer performs CSI / L1-RSRP reporting may be the same as the end time of the cell DTX active period. Method 2-1 may be an operation in which the operating time of the originally set timer is maintained even if there is no actual signal transmission from the base station during the cell DTX inactive period. After the DRX active time ends, the terminal can again start the operation of monitoring the LP-WUS using LR.

[0139] The DRX active time may be extended due to the start or restart of related timers. For example, in conventional standards, a new timer that can be started by the onDuration timer or reception by LP-WUS is started for the first time, and if the PDCCH of a new transmission is monitored while the timer is operating, the inactivity timer is started and the DRX active time may be extended.

[0140] FIG. 10 is a diagram showing the timing at which the operation proposed in Method 2-1 is performed. When the time at which the terminal receives the LP-WUS is denoted as T, the time at which the DRX active time begins may be T+t1. The cell DTX active period may end at T+t2, and the DRX active time of the terminal may end at T+t3. Therefore, periodic CSI / L1-RSRP reporting may be performed from time T+t1 to time T+t2, i.e., during 't2-t1'.

[0141] For example, when the time at which the terminal receives the LP-WUS is used as the reference (T=0), if the start time of the DRX active time is 2ms, the end time of the cell DTX active period is 8ms, and the length of the timer that starts the first DRX is set to 10ms, the terminal can perform periodic CSI / L1-RSRP reporting within the time interval from 2ms to 8ms. At this time, if a PDCCH instructing a new transmission is not received, the DRX active time of the terminal can end at 12ms. If an additional timer (e.g., an inactivity timer) is set to 20ms and the terminal receives a PDCCH instructing a new transmission at 4ms, the inactivity timer can start and continue up to 24ms. However, even in this case, the terminal can perform periodic CSI / L1-RSRP reporting only within the time interval from 2ms to 8ms, provided there is no retransmission occurring after the end time of the additional timer.

[0142] The terminal operation proposed in the above method 2-1 can be defined as follows.

[0143] - The above terminal may not need to perform periodic CSI / L1-RSRP reporting during time intervals when the cell DTX is not active.

[0144] - The above terminal may not be expected to perform periodic CSI / L1-RSRP reporting during time intervals other than the cell DTX active period.

[0145] Method 2-2: If the start time of the DRX active time indicated via LP-WUS is the cell DTX active period, but part of the DRX active time overlaps with the cell DTX inactive period, the terminal performs periodic CSI / L1-RSRP reporting throughout the entire DRX active time period.

[0146] When the terminal receives an MR wake-up instruction via LP-WUS, it can start the DRX active time by activating a timer at a set time. Since the start time of the DRX active time is located within the cell DTX active period, the terminal can start the DRX active time and periodically perform CSI / L1-RSRP reporting within that time period. Subsequently, the DRX active time continues even after the cell DTX active period ends, and the DRX active time can be terminated outside the cell DTX active period. The terminal can periodically perform CSI / L1-RSRP reporting within the DRX active time, regardless of whether it is in the cell DTX active or inactive period. Therefore, the point at which the terminal no longer performs CSI / L1-RSRP reporting may be the same as the end time of the DRX active time. Even if a portion of the DRX active time is located within the cell DTX inactive period, the terminal can maintain operation according to the set timer because the base station transmitted an LP-WUS at a previous time to instruct the terminal to operate in MR.

[0147] The DRX active time may be extended due to the start or restart of related timers. For example, in conventional standards, if a new timer, which can be initiated by the onDuration timer or reception by the LP-WUS, is started for the first time and the PDCCH of a new transmission is monitored while that timer is operating, the inactivity timer is started, thereby extending the DRX active time. Therefore, the DRX active time may refer to the entire period during which the related timer operates and PDCCH monitoring is performed.

[0148] FIG. 11 is a diagram showing the timing at which the operation proposed in Method 2-2 is performed. When the time at which the terminal receives the LP-WUS is denoted as T, the time at which the actual timer is operated to start the DRX active time may be T+t1. The cell DTX active period may end at T+t2, and the DRX active time of the terminal may end at T+t3. Therefore, periodic CSI / L1-RSRP reporting may be performed from time T+t1 to time T+t3, i.e., during 't3-t1'.

[0149] For example, when the time at which the terminal receives the LP-WUS is used as the reference (T=0), if the start time of the DRX active time is 2ms, the end time of the cell DTX active period is 8ms, and the length of the timer that starts the first DRX is set to 10ms, the terminal can perform periodic CSI / L1-RSRP reporting within a time interval from 2ms to 12ms. At this time, if a PDCCH instructing a new transmission is not received, the DRX active time of the terminal can end at 12ms. If an additional timer (e.g., an inactivity timer) is set to 20ms and the terminal receives a PDCCH instructing a new transmission at 4ms, the inactivity timer can start and continue up to 24ms. In this case, provided there is no retransmission occurring after the end time of the additional timer, the terminal can perform periodic CSI / L1-RSRP reporting within a time interval from 2ms to 24ms.

[0150] The terminal operation proposed in the above method 2-2 can be defined as follows.

[0151] - The above terminal may periodically perform CSI / L1-RSRP reporting during the DRX active time.

[0152] - The above terminal can be expected to periodically perform CSI / L1-RSRP reporting during the DRX active time.

[0153] Method 2-3: If the start time of the DRX active time indicated via LP-WUS is the cell DTX active period, but part of the DRX active time overlaps with the cell DTX inactive period, the terminal pre-starts the DRX active time and performs periodic CSI / L1-RSRP reporting so that the DRX active time can end within the cell DTX active period.

[0154] When the terminal receives an MR wake-up instruction from the LP-WUS, it may start a DRX active time by operating a timer at a predetermined time. However, if the end time of the timer that first starts the DRX active time (e.g., onDuration timer or a new timer) is not within the cell DTX active period, the terminal may start the timer in advance so that it can end within the cell DTX active period. The terminal may periodically perform CSI / L1-RSRP reporting within the DRX active time. Since time is required to operate as MR, depending on the implementation, the terminal's CSI / L1-RSRP reporting may not necessarily be performed even if the timer operates and it is the DRX active time. The point at which the terminal no longer performs periodic CSI / L1-RSRP reporting may coincide with the end time of the cell DTX active period. Subsequently, the terminal may resume the operation of monitoring the LP-WUS using LR.

[0155] The DRX active time may be extended due to the start or restart of related timers. For example, in conventional standards, if a new timer, which can be initiated by the onDuration timer or reception by the LP-WUS, is started for the first time and the PDCCH of a new transmission is monitored while the timer is operating, the inactivity timer is started and the DRX active time may be extended. Therefore, the DRX active time may correspond to the period during which the related timer operates. When a timer caused by a new transmission, such as the inactivity timer, is activated, the periodic CSI / L1-RSRP reporting operation in the time period outside the cell DTX active period may follow Method 2-1 or Method 2-2 above.

[0156] FIG. 12 is a diagram showing the timing at which the operation proposed in Method 2-3 is performed. When the time at which the terminal receives the LP-WUS is denoted as T, the time at which the DRX active time begins may be T+t1. However, in the proposed operation, in order to match the end time of the timer that starts the initial DRX active time, the terminal may start the timer from time T+t0 and begin the DRX active time. At time T+t3, the cell DTX active period ends, and at the same time, the terminal may end the timer. At time T+t3, the DRX active time of the terminal may end. Therefore, periodic CSI / L1-RSRP reporting can be performed by the terminal from the actual time T+t0 to time T+t3, i.e., for 't3-t0'.

[0157] For example, when the time at which the terminal receives the LP-WUS is used as the reference (T=0), t1 is 2ms, but the start time of the DRX active time may be 1ms, which is earlier than that. If the length of the timer that starts the initial DRX is set to 10ms, the terminal may perform periodic CSI / L1-RSRP reporting within a time interval from 1ms to 11ms. At this time, if a PDCCH instructing a new transmission is not received, the DRX active time of the terminal may end at 11ms. If an additional timer (e.g., an inactivity timer) is set to 20ms and the terminal receives a PDCCH instructing a new transmission at 2ms, the inactivity timer may start and continue up to 22ms. In this case, the time interval during which the terminal performs periodic CSI / L1-RSRP reporting may be from 2ms to 11ms if following Method 2-1, and from 2ms to 22ms if following Method 2-2, provided there is no retransmission occurring after the end of the additional timer.

[0158] The start of the timer for the terminal to first start the DRX active time can be defined as follows.

[0159] - The above terminal can receive LP-WUS and start a timer to start the DRX active time at the earlier of the time after the offset and the start time of the cell DTX active period.

[0160] Method 3: A method in which the occurrence of periodic CSI / L1-RSRP reporting during DRX active times that do not overlap with cell DTX active times is determined based on the overlap time or ratio.

[0161] Whether periodic CSI / L1-RSRP reporting is performed during a time interval within the DRX active time that does not overlap with the cell DTX active time can be determined based on the time during which the two time intervals overlap or the ratio of the overlapping time. In other words, depending on whether the time during which the cell DTX active time and the DRX active time overlap, or the ratio thereof, is greater or smaller than a threshold, whether periodic CSI / L1-RSRP reporting is performed during the non-overlapping interval. The DRX active time described in Method 3 may refer to the DRX active time that can be started by a terminal that has received a wake-up instruction from the LP-WUS. In other words, the said DRX active time may refer to the operating interval of a timer (e.g., an onDuration timer or a new timer) that starts the first DRX active time.

[0162] FIG. 13 is a diagram showing the time or ratio of overlap between the cell DTX active period and the DRX active period. Referring to FIG. 13, the operating period of the DRX active period that can be initiated by the LP-WUS or the timer that starts the first DRX active period (e.g., onDuration timer or new timer) may be represented as t_a, and the time of overlap between the cell DTX active period and the DRX active period may be represented as t_b. The ratio of the time of overlap between the cell DTX active period and the DRX active period may be represented as 't_b / t_a'. Whether periodic CSI / L1-RSRP reporting is performed during the period where the cell DTX active period and the DRX active period do not overlap, i.e., the 't_a - t_b' period in FIG. 13, can be determined as follows.

[0163] - If t_b is greater than or equal to X ms, or if 't_b / t_a' is greater than or equal to Y%, the terminal may perform periodic CSI / L1-RSRP reporting in the interval 't_a - t_b'. Here, X and Y may represent threshold values ​​in units of time and percentage, respectively.

[0164] In addition, whether to perform periodic CSI / L1-RSRP reporting may be determined based on the time or ratio during which the cell DTX active period and the DRX active period do not overlap.

[0165] - If 't_a - t_b' is greater than or equal to X ms, or if '(t_a - t_b) / t_a' is greater than or equal to Y%, the terminal may not perform periodic CSI / L1-RSRP reporting during the 't_a - t_b' interval. Here, X and Y may represent threshold values ​​in units of time and percentage, respectively.

[0166] LP-WUS and PDCCH monitoring

[0167] In the following, a method is proposed for how the PDCCH monitoring operation of the terminal is performed when the first case and / or the second case occurs.

[0168] Specifically, when a first case and / or a second case occurs, a time interval during which the terminal's PDCCH monitoring is operated and a method for determining said time interval are proposed. The said time interval may include the point in time when the terminal starts or ends PDCCH monitoring.

[0169] For the first case, when the terminal receives instructions through LP-WUS, the terminal can perform PDCCH monitoring as follows.

[0170] - The above terminal can start a timer and perform PDCCH monitoring only in the period where the DRX active time and the cell DTX active period overlap.

[0171] - The above terminal can start a timer and perform PDCCH monitoring within the DRX active time.

[0172] - The above terminal can start a timer in accordance with the cell DTX active period and perform PDCCH monitoring within the DRX active period.

[0173] When the terminal receives instructions via LP-WUS for the second case, the terminal can perform PDCCH monitoring as follows.

[0174] - The above terminal can start a timer and perform PDCCH monitoring only in the period where the DRX active time and the cell DTX active period overlap.

[0175] - Even if the termination point is during the Cell DTX inactive period, the terminal can perform PDCCH monitoring within the DRX active time.

[0176] - The above terminal can terminate the timer in accordance with the cell DTX active period and perform PDCCH monitoring within the DRX active period.

[0177] Method 4: Method for monitoring the terminal's PDCCH when the start time of the DRX active time indicated via LP-WUS is the cell DTX inactive period, but part of the DRX active time overlaps with the cell DTX active period.

[0178] The above method 4 proposes a method for performing PDCCH monitoring when a terminal receives instructions via LP-WUS for the first case (where the start time of the DRX active time indicated via LP-WUS is the cell DTX inactive period, but part of the operating period overlaps with the cell DTX active period). The PDCCH monitoring operation of the terminal according to the proposed methods 4-1, 4-2, and 4-3 below may be set or directed by a base station.

[0179] Method 4-1: If the start time of the DRX active time indicated via LP-WUS is the cell DTX inactive period, but a portion of the DRX active time overlaps with the cell DTX active period, the terminal performs PDCCH monitoring only during the period where the DRX active time and the cell DTX active period overlap.

[0180] When the terminal receives an MR wake-up instruction via LP-WUS, it may start the DRX active time by operating a timer at a predetermined time. The time at which the terminal starts the timer may correspond to a specific point in time after the preparation time from receiving the LP-WUS and waking up the MR to performing PDCCH monitoring. At this time, even if the timer is operated and the DRX active time is in progress, the terminal may not actually perform PDCCH monitoring. Method 4-1 may be a result based on the assumption that there is no signal transmission from the actual base station, as it is a cell DTX inactive period. The terminal may perform PDCCH monitoring during the period where the timer's operating period (DRX active time) overlaps with the cell DTX active period. Therefore, the time at which the terminal actually starts PDCCH monitoring may be the same as the start time of the cell DTX active period. Subsequently, when the DRX active time ends, the terminal may terminate PDCCH monitoring. After that, the terminal may start the operation of monitoring the LP-WUS again using LR.

[0181] The DRX active time may be extended due to the start or restart of related timers. For example, in conventional standards, a new timer, which can be initiated by the onDuration timer or reception by the LP-WUS, is started for the first time, and if a PDCCH of a new transmission is monitored during the operation of that timer, an inactivity timer is started, thereby extending the DRX active time. Therefore, the DRX active time may refer to the entire period during which the related timer is operated and PDCCH monitoring is performed.

[0182] FIG. 14 is a diagram showing the time at which the operation proposed in Method 4-1 is performed. When the time at which the terminal receives the LP-WUS is denoted as T, the time at which the timer is operated to start the DRX active time may be T+t1. As described above, t1 may correspond to the time from when the terminal receives the LP-WUS and wakes up the MR to perform PDCCH monitoring. The cell DTX active period may start at T+t2, and the DRX active time of the terminal may end at T+t3. Therefore, the terminal can perform PDCCH monitoring for the actual period from T+t2 to T+t3, i.e., for 't3-t2'.

[0183] For example, when the time at which the terminal receives the LP-WUS is used as the reference (T=0), if the start time of the DRX active time is 2ms, the start time of the cell DTX active period is 6ms, and the length of the timer that starts the first DRX is set to 10ms, the terminal can perform PDCCH monitoring during the time interval from 6ms to 12ms. At this time, if a PDCCH instructing a new transmission is not received, the DRX active time of the terminal can end at 12ms. If an additional timer (e.g., an inactivity timer) is set to 20ms and the terminal receives a PDCCH instructing a new transmission at 8ms, the inactivity timer starts and can continue up to 28ms. In this case, the PDCCH monitoring of the terminal can continue from 6ms to 28ms, provided there is no retransmission occurring after the end time of the additional timer.

[0184] The terminal operation proposed in the above method 4-1 can be defined as follows.

[0185] - The above terminal may not need to monitor PDCCH during time intervals when the cell DTX is not active.

[0186] - The above terminal may not expect monitoring or reception of PDCCH during time periods when the cell DTX is not active.

[0187] Method 4-2: If the start time of the DRX active time indicated via LP-WUS is the cell DTX inactive period, but a portion of the DRX active time overlaps with the cell DTX active period, the terminal performs PDCCH monitoring throughout the entire DRX active time period.

[0188] When the terminal receives an MR wake-up instruction via LP-WUS, it may start the DRX active time by operating a timer at a predetermined time. The time at which the terminal starts the timer may correspond to a specific point in time after the preparation time from receiving the LP-WUS and waking up the MR to performing PDCCH monitoring. At this time, since the timer is operating and the DRX active time is in progress, the terminal can perform PDCCH monitoring. Method 4-2 may be a result based on the assumption that signal transmission from the base station will occur even during the cell DTX inactive period, because the terminal's wake-up was instructed via LP-WUS transmission by the base station. The terminal can perform PDCCH monitoring within the timer's operating period, regardless of whether it is the cell DTX active period or the inactive period. Therefore, the time at which the terminal actually starts PDCCH monitoring may be the same as the start time of the DRX active time. Even if a portion of the DRX active time is located within the cell DTX inactive period, the terminal can start PDCCH monitoring because the base station has transmitted LP-WUS and there is information that the terminal needs to receive using MR. Subsequently, when the DRX active time ends, the terminal can stop PDCCH monitoring. After that, the terminal can start the operation of monitoring LP-WUS again using LR.

[0189] The DRX active time may be extended due to the start or restart of related timers. For example, in conventional standards, if a new timer, which can be initiated by the onDuration timer or reception by the LP-WUS, is started for the first time and the PDCCH of a new transmission is monitored while that timer is operating, the inactivity timer may start, thereby extending the DRX active time. Therefore, the DRX active time may refer to the entire period during which the related timer operates and PDCCH monitoring is performed.

[0190] FIG. 15 is a diagram showing the time at which the operation proposed in Method 4-2 is performed. When the time at which the terminal receives the LP-WUS is denoted as T, the time at which the timer is operated to start the DRX active time may be T+t1. As described above, t1 may correspond to the time from when the terminal receives the LP-WUS and wakes up the MR to perform PDCCH monitoring. The cell DTX active period may start at T+t2, and the DRX active time of the terminal may end at T+t3. Therefore, the terminal can perform PDCCH monitoring from the actual time at T+t1 to the time at T+t3, that is, for (t3-t1).

[0191] For example, when the time at which the terminal receives the LP-WUS is used as the reference (T=0), if the start time of the DRX active time is 2ms, the start time of the cell DTX active period is 6ms, and the length of the timer that starts the first DRX is set to 10ms, the terminal can perform PDCCH monitoring during the time interval from 2ms to 12ms. At this time, if a PDCCH instructing a new transmission is not received, the DRX active time of the terminal can end at 12ms. If an additional timer (e.g., an inactivity timer) is set to 20ms and the terminal receives a PDCCH instructing a new transmission at 8ms, the inactivity timer starts and can continue up to 28ms. In this case, the PDCCH monitoring of the terminal can continue from 2ms to 28ms, provided there is no retransmission occurring after the end time of the additional timer.

[0192] The terminal operation proposed in the above method 4-2 can be defined as follows.

[0193] - The above terminal may need to monitor PDCCH during the DRX active time.

[0194] - The above terminal can expect monitoring or reception of PDCCH during the DRX active time.

[0195] Method 4-3: If the start time of the DRX active time indicated via LP-WUS is the cell DTX inactive period, but a portion of the DRX active time overlaps with the cell DTX active period, the terminal starts the DRX active time in alignment with the cell DTX active period and performs PDCCH monitoring.

[0196] When the terminal receives an MR wake-up instruction via LP-WUS, it may start the DRX active time by operating a timer at a predetermined time. However, if the cell DTX active period is not set at the start of the DRX active time, the terminal may start the DRX active time at the start of the cell DTX active period. Therefore, after receiving the instruction from the LP-WUS, the terminal may operate the timer from the start of the cell DTX active period. This may apply to cases where the cell DTX inactive period begins later than the time set for the terminal to receive the LP-WUS, wake up the MR, and start the DRX active time. The terminal may perform PDCCH monitoring within the DRX active time period when the timer is operated. The terminal may maintain the originally set timer's operating time, assuming that there will be no actual signal transmission from the base station during the cell DTX inactive period. The time at which the terminal actually starts PDCCH monitoring may be the same as the start of the cell DTX active period. Subsequently, when the DRX active time ends, the terminal may terminate PDCCH monitoring. After that, the terminal may start monitoring LP-WUS again using LR.

[0197] The DRX active time may be extended due to the start or restart of related timers. For example, in conventional standards, if a new timer, which can be initiated by the onDuration timer or reception by the LP-WUS, is started for the first time and the PDCCH of a new transmission is monitored while that timer is operating, the inactivity timer may start, thereby extending the DRX active time. Therefore, the DRX active time may refer to the entire period during which the related timer operates and PDCCH monitoring is performed.

[0198] FIG. 16 is a diagram showing the time at which the operation proposed in Method 4-3 is performed. Let T be the time at which the terminal receives the LP-WUS. The time at which the timer must be operated to start the DRX active time may be T+t1. As described above, t1 may correspond to the time from when the terminal receives the LP-WUS and wakes up the MR to perform PDCCH monitoring. However, since the time at T+t1 is not the cell DTX active period, the terminal may not start the timer. The cell DTX active period begins at T+t2, and the terminal may start the timer at the same time. The DRX active time of the terminal may end at T+t3. Therefore, the terminal can perform PDCCH monitoring from the actual time at T+t2 to the time at T+t3, that is, for (t3-t2).

[0199] For example, when the time at which the terminal receives LP-WUS is used as the reference (T=0), the start time of the DRX active time is 6ms, which is the same as the start time of the cell DTX active period, and if the length of the timer that starts the first DRX is set to 10ms, the terminal can perform PDCCH monitoring during the time interval from 6ms to 16ms. At this time, if a PDCCH instructing a new transmission is not received, the DRX active time of the terminal can end at 16ms. If an additional timer (e.g., an inactivity timer) is set to 20ms and the terminal receives a PDCCH instructing a new transmission at 8ms, the inactivity timer starts and can continue up to 28ms. In this case, the PDCCH monitoring of the terminal can continue from 6ms to 28ms, provided there is no retransmission occurring after the end time of the additional timer.

[0200] The terminal operation proposed in the above method 4-3 can be defined as follows.

[0201] - The above terminal may need to monitor PDCCH during the DRX active time.

[0202] - The above terminal can expect monitoring or reception of PDCCH during the DRX active time.

[0203] The start of the timer at which the above terminal first starts the DRX active time can be defined as follows.

[0204] - The above terminal can receive LP-WUS and start a timer to start the DRX active time at the later of the time after the offset and the start time of the cell DTX active period.

[0205] Method 5: Method for monitoring the terminal's PDCCH when the start time of the DRX active time indicated via LP-WUS is the cell DTX active period, but part of the DRX active time overlaps with the cell DTX inactive period.

[0206] The above method 5 proposes a method for performing PDCCH monitoring when a terminal receives instructions via LP-WUS for the second case (where the start time of the DRX active time indicated via LP-WUS is the cell DTX active period, but part of the operating period overlaps with the cell DTX inactive period). The PDCCH monitoring operation of the terminal according to the proposed methods 5-1, 5-2, and 5-3 below may be set or directed by the base station.

[0207] Method 5-1: If the start time of the DRX active time indicated by the LP-WUS is the cell DTX active period but part of the operating period overlaps with the cell DTX inactive period, the terminal can perform PDCCH monitoring only in the period where the DRX active time and the cell DTX active period overlap.

[0208] When the terminal receives an MR wake-up instruction from the LP-WUS, it may start the DRX active time by operating a timer at a predetermined time. Since the start time of the DRX active time is located within the cell DTX active period, the terminal may start the timer to perform PDCCH monitoring. Subsequently, the DRX active time continues even after the cell DTX active period ends, and the DRX active time may end outside the cell DTX active period. The terminal may perform PDCCH monitoring only during the period where the DRX active time overlaps with the cell DTX active period. Therefore, the time at which the terminal terminates the actual PDCCH monitoring may be the same as the time at which the cell DTX active period ends. Method 5-1 may be an operation in which the originally set timer's operating time is maintained even if there is no actual signal transmission from the base station during the cell DTX inactive period. After the PDCCH monitoring is terminated, the terminal may start the operation of monitoring the LP-WUS again using the LR.

[0209] The DRX active time may be extended due to the start or restart of related timers. For example, in conventional standards, if a new timer, which can be initiated by the onDuration timer or reception by the LP-WUS, is started for the first time and the PDCCH of a new transmission is monitored while that timer is operating, the inactivity timer may start, thereby extending the DRX active time. Therefore, the DRX active time may refer to the entire period during which the related timer operates and PDCCH monitoring is performed.

[0210] FIG. 17 is a diagram showing the time at which the operation proposed in Method 5-1 is performed. When the time at which the terminal receives the LP-WUS is denoted as T, the time at which the timer is operated to start the DRX active time may be T+t1. As described above, t1 may correspond to the time from when the terminal receives the LP-WUS and wakes up the MR to perform PDCCH monitoring. The cell DTX active period may end at T+t2, and the DRX active time of the terminal may end at T+t3. Therefore, the terminal can perform PDCCH monitoring from the actual time at T+t1 to the time at T+t2, that is, for the period of 't2-t1'.

[0211] For example, when the time at which the terminal receives the LP-WUS is used as the reference (T=0), if the start time of the DRX active time is 2ms, the end time of the cell DTX active period is 8ms, and the length of the timer that starts the first DRX is set to 10ms, the terminal can perform PDCCH monitoring during the time interval from 2ms to 8ms. At this time, if a PDCCH instructing a new transmission is not received, the DRX active time of the terminal can end at 12ms. If an additional timer (e.g., an inactivity timer) is set to 20ms and the terminal receives a PDCCH instructing a new transmission at 4ms, the inactivity timer starts and can continue up to 24ms. However, even in this case, the PDCCH monitoring of the terminal can continue from 2ms to 8ms, provided there is no retransmission occurring after the end time of the additional timer.

[0212] The terminal operation proposed in the above method 5-1 can be defined as follows.

[0213] - The above terminal may not need to monitor PDCCH during time intervals when the cell DTX is not active.

[0214] - The above terminal may not expect monitoring or reception of PDCCH during time periods when the cell DTX is not active.

[0215] Method 5-2: If the start time of the DRX active time indicated via LP-WUS is the cell DTX active period, but part of the DRX active time overlaps with the cell DTX inactive period, the terminal performs PDCCH monitoring throughout the entire DRX active time period.

[0216] When the terminal receives an MR wake-up instruction via LP-WUS, it can start a timer at a predetermined time to begin the DRX active time. Since the start time of the DRX active time is located within the cell DTX active period, the terminal can start the timer to perform PDCCH monitoring. The time at which the terminal starts the timer may correspond to a specific point in time after the preparation time from receiving the LP-WUS and waking up the MR to performing PDCCH monitoring. At this time, since the timer is operating and the DRX active time is in progress, the terminal can perform PDCCH monitoring. Within the operating period of the timer, the terminal can perform PDCCH monitoring regardless of whether it is a cell DTX active period or an inactive period. Therefore, the time at which the terminal terminates the actual PDCCH monitoring may be the same as the end time of the DRX active time. Even if a portion of the DRX active time is a cell DTX inactive period, the terminal can maintain operation according to the set timer because the base station transmitted an LP-WUS at a previous time to instruct the terminal to operate as MR. Subsequently, when the DRX active time ends, the terminal may terminate PDCCH monitoring. After that, the terminal may start monitoring LP-WUS again using LR.

[0217] The DRX active time may be extended due to the start or restart of related timers. For example, in conventional standards, if a new timer, which can be initiated by the onDuration timer or reception by the LP-WUS, is started for the first time and the PDCCH of a new transmission is monitored while that timer is operating, the inactivity timer may start, thereby extending the DRX active time. Therefore, the DRX active time may refer to the entire period during which the related timer operates and PDCCH monitoring is performed.

[0218] FIG. 18 is a diagram showing the time at which the operation proposed in Method 5-2 is performed. When the time at which the terminal receives the LP-WUS is denoted as T, the time at which the timer is operated to start the DRX active time may be T+t1. As described above, the t1 may correspond to the time from when the terminal receives the LP-WUS and wakes up the MR to perform PDCCH monitoring. The cell DTX active period may end at the time of T+t2, and the DRX active time of the terminal may end at the time of T+t3. Therefore, the terminal can perform PDCCH monitoring from the actual time of T+t1 to the time of T+t3, that is, for the period of 't3-t1'.

[0219] For example, when the time at which the terminal receives the LP-WUS is used as the reference (T=0), if the start time of the DRX active time is 2ms, the end time of the cell DTX active period is 8ms, and the length of the timer that starts the first DRX is set to 10ms, the terminal can perform PDCCH monitoring during the time interval from 2ms to 12ms. At this time, if a PDCCH instructing a new transmission is not received, the DRX active time of the terminal can end at 12ms. If an additional timer (e.g., an inactivity timer) is set to 20ms and the terminal receives a PDCCH instructing a new transmission at 4ms, the inactivity timer starts and can continue up to 24ms. In this case, the PDCCH monitoring of the terminal can continue from 2ms to 24ms, provided there is no retransmission occurring after the end time of the additional timer.

[0220] The terminal operation proposed in the above method 5-2 can be defined as follows.

[0221] - The above terminal may need to monitor PDCCH during the DRX active time.

[0222] - The above terminal can expect monitoring or reception of PDCCH during the DRX active time.

[0223] Method 5-3: If the start time of the DRX active time indicated via LP-WUS is the cell DTX active period, but part of the DRX active time overlaps with the cell DTX inactive period, the terminal initiates it in advance and performs PDCCH monitoring so that the DRX active time can end within the cell DTX active period.

[0224] When the terminal receives an MR wake-up instruction via LP-WUS, it may start a DRX active time by operating a timer at a predetermined time. The time at which the terminal starts the timer may correspond to a specific point in time after the preparation time from receiving the LP-WUS and waking up the MR to performing PDCCH monitoring. However, if the end time of the timer that first starts the DRX active time (e.g., onDuration timer or a new timer) is not within the cell DTX active period, the terminal may start the timer in advance so that the timer can end within the cell DTX active period. Therefore, in this case, the DRX active time may start before the terminal satisfies the preparation time from receiving the LP-WUS and waking up the MR to performing PDCCH monitoring. Since time is required for the terminal to operate as MR, even if the timer operates and the DRX active time begins, actual PDCCH monitoring may not necessarily be performed depending on the implementation. The point at which the above terminal terminates actual PDCCH monitoring may be the same as the point at which the cell DTX active period ends. Afterwards, the above terminal may start the operation of monitoring LP-WUS again using LR.

[0225] The DRX active time may be extended due to the start or restart of related timers. For example, in the NR standard, if a new timer, which can be initiated by the onDuration timer or reception by the LP-WUS, is started for the first time and the PDCCH of a new transmission is monitored, the inactivity timer is started and the DRX active time may be extended. Therefore, the DRX active time may correspond to the period during which the related timer operates. When a timer caused by a new transmission, such as the inactivity timer, is activated, the PDCCH monitoring operation for the time period outside the cell DTX active period may follow Method 5-1 or Method 5-2 above.

[0226] FIG. 19 is a diagram showing the time at which the operation proposed in Method 5-3 is performed. When the time at which the terminal receives the LP-WUS is denoted as T, the time at which the actual timer is activated to start the DRX active time may be T+t1. As described above, t1 may correspond to the time from when the terminal receives the LP-WUS and wakes up the MR to perform PDCCH monitoring. However, in the proposed operation, the timer may start at time T+t0 to start the DRX active time in order to match the end time of the timer. At time T+t3, the cell DTX active period ends, and at the same time, the terminal may terminate the timer. At time T+t3, the DRX active time of the terminal may end. Therefore, the terminal can perform PDCCH monitoring from the actual time T+t0 to time T+t3, that is, for a period of 't3-t0'. As described, if a certain amount of time (t1) is required from receiving the LP-WUS until monitoring the PDCCH with the MR, the terminal may not be expected to actually monitor the PDCCH until that point in time.

[0227] For example, when the time at which the terminal receives the LP-WUS is used as the reference (T=0), t1 is 2ms, but the start time of the DRX active time may be 1ms, which is earlier than that. If the length of the timer that starts the first DRX is set to 10ms, the terminal can perform PDCCH monitoring during the time interval from 1ms to 11ms. If a PDCCH instructing a new transmission is not received at this time, the DRX active time of the terminal may end at 11ms. If an additional timer (e.g., an inactivity timer) is set to 20ms and the terminal receives a PDCCH instructing a new transmission at 2ms, the inactivity timer may start and continue up to 22ms. In this case, if there is no retransmission occurring after the end of the additional timer, the PDCCH monitoring of the terminal may end at 2ms to 11ms if following Method 5-1, and may continue at 2ms to 22ms if following Method 5-2.

[0228] The start of the timer at which the above terminal first starts the DRX active time can be defined as follows.

[0229] - The above terminal can receive LP-WUS and start a timer to start the DRX active time at the earlier of the time after the offset and the start time of the cell DTX active period.

[0230] Method 6: A method in which PDCCH monitoring behavior during DRX active time that does not overlap with cell DTX active time is determined based on the overlapping time or ratio.

[0231] PDCCH monitoring operation within a time interval within a DRX active time that does not overlap with the cell DTX active time can be determined based on the time during which the two time intervals overlap or the ratio of the overlapping time. In other words, depending on whether the time during which the cell DTX active time and the DRX active time overlap, or the ratio thereof, is greater or smaller than a threshold value, the decision to monitor PDCCH in the non-overlapping interval can be made. The DRX active time described in Method 6 may refer to the DRX active time that a terminal can start upon receiving a wake-up instruction from the LP-WUS. In other words, the said DRX active time may refer to the operating interval of a timer (e.g., an onDuration timer or a new timer) that starts the first DRX active time.

[0232] FIG. 20 is a diagram showing the time or ratio during which the cell DTX active period and the DRX active period overlap. Referring to FIG. 20, the operating period of the DRX active period that can be initiated by the LP-WUS or the timer that starts the first DRX active period (e.g., onDuration timer or new timer) may be represented as t_a, and the time during which the cell DTX active period and the DRX active period overlap may be represented as t_b. The ratio of the time during which the cell DTX active period and the DRX active period overlap may be represented as 't_b / t_a'. Whether PDCCH monitoring is performed during the period where the cell DTX active period and the DRX active period do not overlap, i.e., the 't_a - t_b' period in FIG. 20, can be determined as follows.

[0233] - If t_b is greater than or equal to X ms, or if 't_b / t_a' is greater than or equal to Y%, the terminal may perform PDCCH monitoring in the interval 't_a - t_b'. Here, X and Y may represent threshold values ​​in units of time and percentage, respectively.

[0234] In addition, whether to perform PDCCH monitoring may be determined based on the time when the cell DTX active period and the DRX active period do not overlap, or based on the above ratio.

[0235] - If 't_a - t_b' is greater than or equal to X ms, or if '(t_a - t_b) / t_a' is greater than or equal to Y%, the terminal may not perform PDCCH monitoring in the 't_a - t_b' interval. Here, X and Y may represent threshold values ​​in units of time and percentage, respectively.

[0236] It is evident that the examples of the proposed methods described above can also be included as one of the implementation methods and thus can be regarded as a type of proposed method. Furthermore, while the proposed methods described above may be implemented independently, they may also be implemented in the form of a combination (or merger) of some proposed methods. Rules may be defined so that information regarding the application of the proposed methods (or information regarding the rules of the proposed methods) is communicated by a base station to a terminal or by a transmitting terminal to a receiving terminal via a predefined signal (e.g., a physical layer signal or a higher layer signal).

[0237] Implementation example

[0238] FIG. 21 is a flowchart according to one embodiment.

[0239] Referring to FIG. 21, one embodiment based on the methods of the present specification may be a method comprising: receiving first configuration information for a cell DTX / DRX and receiving second configuration information related to the DRX active time of a terminal (S2101); and receiving a WUS related to the DRX active time of the terminal (S2103). Additionally, a corresponding method may be included in the embodiment, comprising: transmitting first configuration information for a cell DTX / DRX and transmitting second configuration information related to the DRX active time of a terminal (S2101); and transmitting a WUS related to the DRX active time of the terminal (S2103).

[0240] The WUS of FIG. 21 may be the LP-WUS previously described in this specification. Alternatively, the WUS may be a downlink signal associated with PDCCH monitoring and / or paging monitoring, referred to as a 'specific signal'. Monitoring and reception of the signal may be performed through a first receiver, and configuration information for the signal may be received through a second receiver.

[0241] The first receiver corresponds to a separate receiver (i.e., LR) for receiving LP-WUS, and the second receiver corresponds to the main receiver (i.e., MR). The second receiver may be a receiver for receiving paging signals or control signals for paging signals. Alternatively, the second receiver may be a receiver capable of receiving PDCCH. Although specific names may be changed from LR and MR to others, the first receiver is designed to consume relatively less power than the second receiver. The main receiver may be a receiver of an existing NR system, and even if it is a receiver by a communication system other than an NR system, it may correspond to the main receiver if it is a receiver triggered based on the reception of a signal from another receiver that consumes relatively less power.

[0242] The first receiver and the second receiver may not be physically distinguishable. In the case of an A-IoT (Ambient Internet of Things) device, only the first receiver may be included among the first receiver and the second receiver. If the first receiver and the second receiver are not distinguishable in terms of physical and / or software modules, the WUS and other signals may be distinguished based on the magnitude of the terminal's received power.

[0243] Example 1, described above in relation to PDCCH monitoring based on LP-WUS, may be referred to as Option 1-1, and Example 2 as Option 1-2. The new timer described in relation to Example 2 may be referred to, for example, wus-PDCCHMonitoringTimer, lpwus-PDCCH-MonitoringTimer, or a specific timer. In the methods of this specification, the timer that first starts the DRX active time of the terminal may mean drx-onDurationTimer, wus-PDCCHMonitoringTimer, and / or lpwus-PDCCH-MonitoringTimer.

[0244] When both cell DTX and cell DRX are configured, the active interval and period parameters can be applied commonly between the cell DTX and the cell DRX. Therefore, the active / inactive interval pattern of cell DTX and the active / inactive interval pattern of cell DRX can be identical, and consequently, the contents described through cell DTX in this specification can be applied identically even when cell DTX is replaced with cell DRX.

[0245] In step S2101, the terminal can receive first configuration information regarding the cell DTX / DRX and second configuration information related to the DRX activation time of the terminal from the base station through a transceiver. The first configuration information can be transmitted through CellDTXDRX-Config, which is an upper layer parameter.

[0246] The DRX active time may be, for example, the time during which drx-onDurationTimer, drx-InactivityTimer, or lpwus-PDCCH-MonitoringTimer (or wus-PDCCHMonitoringTimer), etc., configured for a certain DRX group are in operation. Accordingly, the second configuration information related to the DRX active time of the terminal may be DRX-Config for configuring drx-onDurationTimer and drx-InactivityTimer, and / or LPWUS-Config for configuring lpwus-PDCCH-MonitoringTimer.

[0247] In step S2103, the interval from when the terminal receives the WUS until the start of the timer for the DRX active time can be determined / expected by the time-frequency resource, period, offset, number of MOs associated with the MO in which the WUS was received, and / or the offset between the WUS MO and the timer, etc. An example of how the starting point of the DRX active time is determined based on the second setting information is as follows.

[0248] - To determine the WUS MO, the terminal may receive the period specified by periodicityMO-Option1-1 and the time offset specified by offsetMO-Option1-1 via WUS-MOCONNECTED-Option1-1, based on the start of the system frame with SFN 0. The terminal starts WUS monitoring at the first WUS monitoring opportunity that is not earlier than the first slot, which is preceded by the time specified by timeOffsetCONNECTEDOption1-1 by the second slot where drx-onDurationTimer starts, and monitors the WUS for the number of monitoring opportunities specified by numMOOption1-1. The terminal reports the time (in milliseconds) during which the terminal does not need to monitor the WUS prior to the slot where drx-onDurationTimer starts. The terminal does not need to monitor the WUS within the range of the reported number of slots prior to the slot where drx-onDurationTimer starts. If the terminal decides to monitor the PDCCH based on the detected WUS, the terminal starts drx-onDurationTimer.

[0249] - To determine the first WUS monitoring opportunities from the number of WUS monitoring opportunities per period (provided by numMOperPeriodicity-Option 1-2), the terminal may receive the period specified by periodicityMO-Option 1-2 and the time offset specified by offsetMO-Option 1-2 via WUS-MOCONNECTED-Option1-2, relative to the start of the system frame with SFN 0. The terminal reports the time in milliseconds and expects that the time gap from the last WUS monitoring opportunity among the number of WUS monitoring opportunities per period to the slot where wus-PDCCHMonitoringTimer starts is not smaller than the reported time in milliseconds. If the terminal decides to monitor PDCCH based on the detected WUS, the terminal starts wus-PDCCHMonitoringTimer after the time provided by timeOffsetCONNECTEDOption1-2 has elapsed relative to the start time of the first WUS monitoring opportunity among the number of WUS monitoring opportunities per period.

[0250] Referring to Methods 1 through 6, communication between a terminal and a base station is performed during the overlapping time interval based on the fact that the cell DTX active interval (and / or cell DRX active interval) determined based on the first setting information and the DRX active time determined based on the second setting information overlap in the time interval.

[0251] Referring to Methods 1 through 3, the communication includes reporting CSI and / or L1-RSRP. Additionally, the communication may include the terminal receiving a CSI-RS (Channel State Information Reference Signal), an SS / PBCH block (Synchronization Signal and Physical Broadcast Channel block), and / or an SSB (Synchronization Signal Block) for measurements associated with the reporting of CSI and / or L1-RSRP. Furthermore, the communication may include the base station transmitting a CSI-RS, an SS / PBCH block, and / or an SSB for measurements associated with the reporting of CSI and / or L1-RSRP.

[0252] Referring to methods 4 through 6, the communication includes a terminal monitoring and / or receiving a PDCCH. Additionally, the communication includes a base station transmitting a PDCCH. The PDCCH includes a PDCCH for paging signals.

[0253] Referring to Methods 1-1, 2-1, 4-1, and 5-1, the terminal is configured to perform communication only during the time interval where the DRX active time and the cell DTX active time overlap.

[0254] Referring to Methods 1-1 and 4-1, even if the terminal activates the timer and the DRX active time is already in progress, the terminal may not perform PDCCH monitoring and periodic CSI / L1-RSRP reporting by assuming that there is no signal transmission from the actual base station during the cell DTX inactive period.

[0255] Referring to Methods 2-1 and 5-1, the start time of the DRX active time is located within the cell DTX active period, so communication starts normally; however, after the cell DTX active period ends, the terminal stops PDCCH monitoring and periodic CSI / L1-RSRP reporting even if the timer for the DRX active time continues to operate.

[0256] Referring to Methods 1-2, 2-2, 4-2, and 5-2, the terminal performs communication during the DRX active time in both the period where the DRX active time and the cell DTX active period overlap and the period where the DRX active time and the cell DTX active period do not overlap.

[0257] Referring to Methods 1-2 and 4-2, even if the start time of the DRX active time is located during the cell DTX inactive period, since the terminal's wake-up is explicitly indicated through WUS transmission by the base station, it can be assumed that the terminal can receive signal transmission from the base station even during the cell DTX inactive period.

[0258] Referring to Methods 2-2 and 5-2, even if the latter part of the DRX active time transitions into a cell DTX inactive period, since the base station transmitted a WUS at an earlier time to direct the terminal's operation, the terminal can perform PDCCH monitoring and / or CSI / L1-RSRP reporting until the set timer expires, regardless of whether the cell DTX has ended.

[0259] Referring to Methods 1-3 and 4-3, if the (expected) start time of the DRX active time is the cell DTX inactive period but part of the DRX active time overlaps with the cell DTX active period, the terminal delays the DRX active time itself and starts the timer for the DRX active time at the start of the cell DTX active period.

[0260] After receiving instructions from the WUS, the terminal may suspend the operation of the timer if the originally set timer operation point is the cell DTX inactive period, and then start the timer from the point when the cell DTX active period begins.

[0261] Referring to Methods 2-3 and 5-3, if the (expected) start time of the DRX active time is during the cell DTX active period but part of the operating period overlaps with the cell DTX inactive period, the terminal may start a timer in advance so that the DRX active time can end within the cell DTX active period.

[0262] Consequently, the end point of the timer can be the end point of the cell DTX active period. Accordingly, the problem of DRX active time being pushed into the inactive period and wasted can be resolved.

[0263] Referring to Method 3 and Method 6, whether communication is performed during a time interval that does not overlap with the cell DTX active interval during the DRX active time of the terminal can be dynamically determined based on the absolute length of the time interval where the two time intervals overlap or the ratio of the overlapping time intervals.

[0264] The terminal and / or base station may perform communication in all or part of the time interval set to enable communication.

[0265] The embodiments described above are combinations of the components and features of the present disclosure in a specific form. Each component or feature should be considered optional unless otherwise explicitly stated. Each component or feature may be implemented in a form not combined with other components or features. Additionally, it is possible to construct 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 obvious that embodiments may be constructed by combining claims that are not explicitly related in the claims, or that they may be included as new claims by amendment after filing.

[0266] It is obvious to those skilled in the art that the present disclosure may be embodied in other specific forms without departing from the features of the present disclosure. Accordingly, the foregoing detailed description should not be interpreted restrictively in all respects and should be considered exemplary. The scope of the present disclosure shall be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present disclosure are included within the scope of the present disclosure.

[0267] As described above, the embodiments of this specification can be applied to various wireless communication systems.

Claims

1. Regarding the method, A step of receiving first configuration information for cell DTX (Discontinuous Transmission) / DRX (Discontinuous Reception) and receiving second configuration information related to the terminal's DRX active time; and The method includes the step of receiving a WUS (Wake-Up Signal) related to the DRX activation time of the terminal; Based on the fact that the cell DTX active period based on the first setting information overlaps with the DRX active time based on the second setting information in a time interval, communication is performed in the overlapping time interval, method.

2. In Paragraph 1, The above communication includes monitoring the PDCCH (Physical Downlink Control Channel). method.

3. In Paragraph 1, The above communication includes reporting CSI (Channel State Information), method.

4. In Paragraph 1, The above communication is performed only in the time interval where the above DRX activation time and the above cell DTX activation interval overlap, method.

5. In Paragraph 1, The above communication is performed during the DRX activation time, in both the time interval where the DRX activation time and the cell DTX activation interval overlap and the time interval where the DRX activation time and the cell DTX activation interval do not overlap. method.

6. In Paragraph 1, Based on the fact that the starting point of the timer for initiating the above DRX activation time is expected to be within the cell DTX inactive period, the starting point of the timer is changed to the starting point of the cell DTX active period, method.

7. In Paragraph 1, Based on the expectation that the end point of the timer for starting the above DRX active time is within the cell DTX inactive period, the timer is started in advance so that the end point of the timer becomes the end point of the cell DTX active period, method.

8. In Paragraph 1, Whether the communication is performed during a time interval that does not overlap with the cell DTX activation interval during the DRX activation time is set to be determined based on the length of the time interval where the DRX activation time and the cell DTX activation interval overlap, method.

9. In the device, At least one processor; and It includes at least one memory connected to the at least one processor to be operable, and storing instructions that cause the at least one processor to perform a specific operation when executed. The above specific operation is: A step of receiving first configuration information for cell DTX (Discontinuous Transmission) / DRX (Discontinuous Reception) and receiving second configuration information related to the terminal's DRX active time; and The method includes the step of receiving a WUS (Wake-Up Signal) related to the DRX activation time of the terminal; Based on the fact that the cell DTX active period based on the first setting information overlaps with the DRX active time based on the second setting information in a time interval, communication is performed in the overlapping time interval, device.

10. In Paragraph 9, The above device is a terminal comprising at least one transceiver or a processor for controlling the terminal, device.

11. A computer-readable non-volatile storage medium comprising at least one computer program that causes a terminal including at least one processor to perform an operation, wherein the operation is: A step of receiving first configuration information for cell DTX (Discontinuous Transmission) / DRX (Discontinuous Reception) and receiving second configuration information related to the terminal's DRX active time; and The method includes the step of receiving a WUS (Wake-Up Signal) related to the DRX activation time of the terminal; Based on the fact that the cell DTX active period based on the first setting information overlaps with the DRX active time based on the second setting information in a time interval, communication is performed in the overlapping time interval, Storage medium.

12. Regarding the method, A step of transmitting first configuration information for cell DTX (Discontinuous Transmission) / DRX (Discontinuous Reception) and transmitting second configuration information related to the terminal's DRX active time; and The method includes the step of transmitting a WUS (Wake-Up Signal) related to the DRX activation time of the terminal; Based on the fact that the cell DTX active period based on the first setting information overlaps with the DRX active time based on the second setting information in a time interval, communication is performed in the overlapping time interval, method.

13. In the device, At least one processor; and It includes at least one memory connected to the at least one processor to be operable, and storing instructions that cause the at least one processor to perform a specific operation when executed. The above specific operation is: A step of transmitting first configuration information for cell DTX (Discontinuous Transmission) / DRX (Discontinuous Reception) and transmitting second configuration information related to the terminal's DRX active time; and The method includes the step of transmitting a WUS (Wake-Up Signal) related to the DRX activation time of the terminal; Based on the fact that the cell DTX active period based on the first setting information overlaps with the DRX active time based on the second setting information in a time interval, communication is performed in the overlapping time interval, device.

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