Method and apparatus for transmitting and receiving low-power signal in communication system

Abstract

Disclosed are a method and apparatus for transmitting and receiving a low-power signal in a communication system. The method for a terminal includes the steps of: receiving one or more time offsets from a base station; and if one time offset among the one or more time offsets is equal to or greater than a wakeup delay time of the terminal, performing monitoring on a low-power wakeup signal in a low-power wakeup signal occasion (LO) indicated by at least one time offset among the one or more time offsets.

Description

Method and device for transmitting and receiving low-power signals in a communication system

[0001] The present disclosure relates to a technique for transmitting and receiving signals in a communication system, and more particularly, to a technique for transmitting and receiving low-power signals.

[0002] With the advancement of information and communication technology, various wireless communication technologies are being developed. Representative wireless communication technologies include LTE (long term evolution), LTE-A (advanced), and NR (new radio), all of which are defined by the 3rd generation partnership project (3GPP) standards. LTE and / or LTE-A may be considered 4G (4th Generation) communication technologies. NR may be considered 5G (5th Generation) communication technologies.

[0003] In order to handle the rapidly increasing amount of wireless data following the commercialization of 4G communication systems (e.g., communication systems supporting LTE and / or LTE-A), 5G communication systems (e.g., communication systems supporting NR) that use frequency bands higher than the frequency bands of 4G communication systems (e.g., frequency bands below 6 GHz) as well as frequency bands lower than the frequency bands of 4G communication systems are being considered. 5G communication systems may support enhanced Mobile BroadBand (eMBB), Ultra Reliable Low Latency Communication (URLLC), and / or massive Machine Type Communication (mMTC).

[0004] To reduce power consumption of terminals in 5G communication systems, a low-power wake-up signal and a low-power wake-up receiver for receiving the low-power wake-up signal may be considered. The power consumption for monitoring the low-power wake-up signal in the low-power wake-up receiver may be lower than the power consumption for monitoring the signal in a conventional receiver (e.g., a receiver of a conventional terminal).

[0005] For the purpose of reducing power consumption, the terminal may stop monitoring signals through a conventional receiver (e.g., a conventional signal receiver) and perform monitoring of low-power wake-up signals through a low-power wake-up receiver. When a low-power wake-up signal is received through the terminal's low-power wake-up receiver, the terminal may perform monitoring of signals through the conventional receiver. To support the above-described operation, methods for transmitting and receiving low-power wake-up signals may be required in a communication system.

[0006] Meanwhile, the technology that serves as the background of the invention is written to promote understanding of the background of the invention, and may include content that is not a prior art already known to a person with ordinary skill in the field to which the technology belongs.

[0007] The purpose of the present disclosure to solve the above problems is to provide a method and device for transmitting and receiving a low-power signal in a communication system.

[0008] According to embodiments of the present disclosure for achieving the above object, a method of a terminal includes: receiving one or more time offsets from a base station; and, if one of the one or more time offsets is greater than or equal to a wake-up delay time of the terminal, performing monitoring for a low-power wake-up signal at a LO (Low-power wake-up signal Occasion) indicated by at least one of the one or more time offsets.

[0009] The wake-up delay time may be one of one or more candidate times from the time the terminal receives the low-power wake-up signal to the time the terminal performs physical downlink control channel (PDCCH) monitoring.

[0010] The method of the terminal may further include a step of transmitting information of the wakeup delay time to the base station, wherein the information of the wakeup delay time may be included in a UE (user equipment) capability report transmitted from the terminal to the base station, and the one or more time offsets may be determined based on the wakeup delay time.

[0011] The method of the terminal may further include a step of performing monitoring for a paging signal at a PO (paging occasion) associated with the LO when the low-power wake-up signal of the terminal is detected at the LO.

[0012] The method of the terminal may further include a step of performing monitoring for a paging signal in the PO without monitoring for the LO, if the one or more time offsets are less than the wakeup delay time.

[0013] The above one time offset may be equal to the above at least one time offset.

[0014] The one time offset may be a largest time offset among the one or more time offsets, and the at least one time offset may be a minimum time offset indicating an interval between the LO and the PO that is greater than or equal to the wakeup delay time among the one or more time offsets.

[0015] The terminal may include a low power receiver and a main radio, and monitoring at the LO may be performed by the low power receiver, and monitoring at the PO may be performed by the main radio.

[0016] The method of the terminal may further include a step of performing a measurement operation using the main radio, wherein if the result of the measurement operation exceeds a threshold, monitoring for the low-power wake-up signal may be performed in the LO, and if the result of the measurement operation is below the threshold, monitoring for the paging signal may be performed in the PO without monitoring in the LO.

[0017] The method of the terminal may further include a step of performing a measurement operation using the low-power receiver, wherein when a result of the measurement operation is greater than or equal to a threshold, monitoring for the low-power wake-up signal may be performed in the LO, and when a result of the measurement operation is less than or equal to the threshold, monitoring for a paging signal may be performed in the PO without monitoring in the LO.

[0018] According to embodiments of the present disclosure for achieving the above object, a terminal includes at least one processor, wherein the at least one processor causes the terminal to receive one or more time offsets from a base station; and, if one of the one or more time offsets is greater than or equal to a wake-up delay time of the terminal, perform monitoring for a low-power wake-up signal at an LO (Low-power wake-up signal Occasion) indicated by at least one of the one or more time offsets.

[0019] The wake-up delay time may be one of one or more candidate times from the time the terminal receives the low-power wake-up signal to the time the terminal performs physical downlink control channel (PDCCH) monitoring.

[0020] The at least one processor may further cause the terminal to transmit information of the wakeup delay time to the base station, wherein the information of the wakeup delay time may be included in a user equipment (UE) capability report transmitted from the terminal to the base station, and the one or more time offsets may be determined based on the wakeup delay time.

[0021] The at least one processor may further cause the terminal to monitor for a paging signal at a PO (paging occasion) associated with the LO when the low-power wake-up signal of the terminal is detected at the LO.

[0022] The at least one processor may further cause the terminal to monitor for a paging signal in the PO without monitoring for the LO if the one or more time offsets are less than the wakeup delay time.

[0023] The above one time offset may be equal to the above at least one time offset.

[0024] The one time offset may be a largest time offset among the one or more time offsets, and the at least one time offset may be a minimum time offset indicating an interval between the LO and the PO that is greater than or equal to the wakeup delay time among the one or more time offsets.

[0025] The terminal may further include a low power receiver and a main radio, and monitoring in the LO may be performed by the low power receiver, and monitoring in the PO may be performed by the main radio.

[0026] The at least one processor may further cause the terminal to perform a measurement operation using the main radio, wherein if a result of the measurement operation exceeds a threshold, monitoring for the low-power wake-up signal in the LO may be performed, and if a result of the measurement operation is below the threshold, monitoring for a paging signal in the PO may be performed without monitoring in the LO.

[0027] The at least one processor may further cause the terminal to perform a measurement operation using the low-power receiver, and when a result of the measurement operation is greater than or equal to a threshold, monitoring for the low-power wake-up signal may be performed at the LO, and when a result of the measurement operation is less than the threshold, monitoring for a paging signal may be performed at the PO without monitoring at the LO.

[0028] According to the present disclosure, a terminal may include a low-power receiver and a main radio, and the terminal may receive a low-power wake-up signal using the low-power receiver. If the low-power wake-up signal includes a wake-up instruction for the terminal, the terminal may perform a monitoring operation for a paging signal using the main radio. The terminal may switch between a monitoring operation using the low-power receiver and a monitoring operation using the main radio based on the results of the measurement operation. Accordingly, a signal reception method in the terminal may be improved, power consumption of the terminal may be reduced, and the performance of the communication system may be enhanced.

[0029] Figure 1 is a conceptual diagram illustrating embodiments of a communication network.

[0030] Figure 2 is a block diagram illustrating embodiments of communication nodes constituting a communication network.

[0031] Figure 3 is a conceptual diagram illustrating embodiments of system frames in a communication network.

[0032] Figure 4 is a conceptual diagram illustrating embodiments of subframes in a communication network.

[0033] Figure 5 is a conceptual diagram illustrating embodiments of slots in a communication network.

[0034] Figure 6 is a conceptual diagram illustrating embodiments of signal monitoring operations in a communication network.

[0035] Figure 7 is a conceptual diagram illustrating embodiments of RRC state changes of a terminal in a communication network.

[0036] Figure 8 is a block diagram illustrating embodiments of communication nodes that constitute a communication network.

[0037] FIG. 9 is a conceptual diagram illustrating embodiments of a method for monitoring a low-power wake-up signal of a terminal in a communication network.

[0038] FIG. 10 is a conceptual diagram illustrating embodiments of a method for monitoring a low-power wake-up signal of a terminal in a communication network.

[0039] FIG. 11 is a conceptual diagram illustrating embodiments of setting up a low-power wake-up signal occasion (e.g., LO) and a low-power wake-up signal monitoring occasion (e.g., MO) in a communication network.

[0040] Fig. 12 is a conceptual diagram illustrating embodiments of a mapping method of LO and PO in a communication network.

[0041] Fig. 13 is a conceptual diagram illustrating embodiments of a mapping method of LO and PO in a communication network.

[0042] Fig. 14 is a conceptual diagram illustrating embodiments of a mapping method of LO and PO in a communication network.

[0043] FIG. 15 is a flowchart illustrating embodiments of a method for setting up monitoring of a low-power wake-up signal in a communication network.

[0044] Figure 16 is a flowchart illustrating embodiments of a monitoring method in a communication network.

[0045] Figure 17 is a flowchart illustrating embodiments of a monitoring method in a communication network.

[0046] This disclosure may be subject to various modifications and various embodiments. Specific embodiments are illustrated and described in detail in the drawings. However, this is not intended to limit the disclosure to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the disclosure.

[0047] While terms such as "first" and "second" may be used to describe various components, these components should not be limited by these terms. These terms are used solely to distinguish one component from another. For example, without departing from the scope of the present disclosure, a first component could be referred to as a "second component," and similarly, a second component could also be referred to as a "first component." The term "and / or" encompasses any combination of multiple related items or any one of multiple related items.

[0048] In the present disclosure, “at least one of A and B” may mean “at least one of A or B” or “at least one of combinations of one or more of A and B.” Furthermore, in the present disclosure, “at least one of A and B” may mean “at least one of A or B” or “at least one of combinations of one or more of A and B.”

[0049] In the present disclosure, (re)transmission may mean “transmission,” “retransmission,” or “transmission and retransmission,” (re)setting may mean “setting,” “resetting,” or “setting and resetting,” (re)connection may mean “connection,” “reconnection,” or “connection and reconnection,” and (re)connection may mean “connection,” “reconnection,” or “connection and reconnection.”

[0050] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0051] The terminology used in this disclosure is only used to describe specific embodiments and is not intended to limit the present disclosure. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this disclosure, it should be understood that the terms "comprises" or "has" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0052] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which this disclosure pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0053] Hereinafter, preferred embodiments of the present disclosure will be described in more detail with reference to the attached drawings. In order to facilitate an overall understanding in describing the present disclosure, identical reference numerals are used for identical components in the drawings, and redundant descriptions of identical components are omitted.

[0054] A communication network to which embodiments of the present disclosure are applied will be described. The communication network to which embodiments of the present disclosure are applied is not limited to the scope described below, and embodiments of the present disclosure may be applied to various communication networks. Here, "communication network" may be used interchangeably with "communication system." "Communication network" may refer to a wireless communication network, and "communication system" may refer to a wireless communication system.

[0055] In the present disclosure, “an operation (e.g., a transmission operation) is set” may mean that “setting information for the operation (e.g., an information element, a parameter)” and / or “information instructing performance of the operation” are signaled. “An information element (e.g., a parameter) is set” may mean that the information element is signaled. In the present disclosure, the signaling may be at least one of system information (SI) signaling (e.g., transmission of a system information block (SIB) and / or a master information block (MIB)), RRC signaling (e.g., transmission of RRC parameters and / or upper layer parameters), MAC control element (CE) signaling, or PHY signaling (e.g., transmission of downlink control information (DCI), uplink control information (UCI), and / or sidelink control information (SCI)).

[0056] Figure 1 is a conceptual diagram illustrating embodiments of a communication network.

[0057] Referring to FIG. 1, the base station (110) can support cellular communication (e.g., long term evolution (LTE), advanced LTE-A, LTE-A Pro, unlicensed LTE-U, new radio (NR), unlicensed NR-U, etc. as defined in the 3rd generation partnership project (3GPP) standard). The base station (110) can support multiple input multiple output (MIMO) (e.g., single user (SU)-MIMO, multi user (MU)-MIMO, massive MIMO, etc.), coordinated multipoint (CoMP), carrier aggregation (CA), etc. The terminal (120) can perform communication (e.g., uplink communication and / or downlink communication) with the base station (110).

[0058] The communication nodes (e.g., base stations, terminals, etc.) that constitute the communication network described above can support a communication protocol based on CDMA (code division multiple access), a communication protocol based on WCDMA (wideband CDMA), a communication protocol based on TDMA (time division multiple access), a communication protocol based on FDMA (frequency division multiple access), a communication protocol based on SC (single carrier)-FDMA, a communication protocol based on OFDM (orthogonal frequency division multiplexing), a communication protocol based on OFDMA (orthogonal frequency division multiple access), etc.

[0059] Among communication nodes, a base station may be referred to as a NodeB, an evolved NodeB, a 5g NodeB (gNodeB), a BTS (base transceiver station), a radio base station, a radio transceiver, an access point, an access node, a Tx / Rx Point, etc. Among communication nodes, a terminal may be referred to as a UE (user equipment), an access terminal, a mobile terminal, a station, a subscriber station, a portable subscriber station, a mobile station, a node, a device, etc. A communication node may have the following structure.

[0060] Figure 2 is a block diagram illustrating embodiments of communication nodes constituting a communication network.

[0061] Referring to FIG. 2, a communication node (200) may include at least one processor (210), a memory (220), or at least one of a transmission / reception device (230) that is connected to a network and performs communication. In addition, the communication node (200) may further include an input interface device (240), an output interface device (250), a storage device (260), etc. Each component included in the communication node (200) may be connected by a bus (270) and communicate with each other.

[0062] However, each component included in the communication node (200) may be connected through an individual interface or individual bus centered around the processor (210), rather than a common bus (270). For example, the processor (210) may be connected to at least one of a memory (220), a transmission / reception device (230), an input interface device (240), an output interface device (250), and a storage device (260) through a dedicated interface.

[0063] The processor (210) can execute program commands stored in at least one of the memory (220) and the storage device (260). The processor (210) may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor in which the methods according to embodiments of the present disclosure are performed. Each of the memory (220) and the storage device (260) may be configured with at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory (220) may be configured with at least one of a read-only memory (ROM) and a random access memory (RAM).

[0064] Next, the operating methods of communication nodes in a communication network will be described. Even if a method (e.g., transmitting or receiving a signal) performed by a first communication node among the communication nodes is described, a corresponding second communication node can perform a method (e.g., receiving or transmitting a signal) corresponding to the method performed by the first communication node. In other words, if the operation of a first terminal (e.g., a transmitting terminal) is described, a corresponding second terminal (e.g., a receiving terminal) can perform an operation corresponding to the operation of the first terminal. Conversely, if the operation of a second terminal is described, a corresponding first terminal can perform an operation corresponding to the operation of the second terminal.

[0065] Figure 3 is a conceptual diagram illustrating embodiments of a system frame in a communication network.

[0066] Referring to FIG. 3, time resources in a communication network can be divided into frame units. For example, system frames can be set consecutively in the time domain of the communication network. The length of a system frame can be 10 ms (milliseconds). The system frame number (SFN) can be set from #0 to #1023. In this case, 1024 system frames can be repeated in the time domain of the communication network. For example, the SFN of the system frame following system frame #1023 can be #0.

[0067] A system frame may include two half frames. A half frame may be 5 ms long. A half frame located at the beginning of the system frame may be referred to as "half frame #0," and a half frame located at the end of the system frame may be referred to as "half frame #1." A system frame may include 10 subframes. A subframe may be 1 ms long. The 10 subframes within a system frame may be referred to as "subframes #0-9."

[0068] Figure 4 is a conceptual diagram illustrating embodiments of subframes in a communication network.

[0069] Referring to FIG. 4, one subframe may include n slots, where n may be a natural number. Accordingly, one subframe may be composed of one or more slots.

[0070] Figure 5 is a conceptual diagram illustrating embodiments of slots in a communication network.

[0071] Referring to FIG. 5, a slot may include one or more symbols. A slot illustrated in FIG. 5 may include 14 symbols. The length of a slot may vary depending on the number of symbols included in the slot and the symbol length. Alternatively, the length of a slot may vary depending on the numerology. If the subcarrier spacing is 15 kHz (e.g., μ=0), the slot length may be 1 ms. In this case, one system frame may include 10 slots. If the subcarrier spacing is 30 kHz (e.g., μ=1), the slot length may be 0.5 ms. In this case, one system frame may include 20 slots.

[0072] When the subcarrier spacing is 60 kHz (e.g., μ=2), the slot length can be 0.25 ms. In this case, one system frame can contain 40 slots. When the subcarrier spacing is 120 kHz (e.g., μ=3), the slot length can be 0.125 ms. In this case, one system frame can contain 80 slots. When the subcarrier spacing is 240 kHz (e.g., μ=4), the slot length can be 0.0625 ms. In this case, one system frame can contain 160 slots.

[0073] A symbol may be configured as a downlink symbol, a flexible symbol, or an uplink symbol. A slot consisting of only DL (downlink) symbols may be referred to as a "DL slot," a slot consisting of only FL symbols may be referred to as a "FL (flexible) slot," and a slot consisting of only UL (uplink) symbols may be referred to as a "UL slot."

[0074] The reference signal may be a channel state information-reference signal (CSI-RS), a sounding reference signal (SRS), a demodulation-reference signal (DM-RS), a phase tracking-reference signal (PT-RS), etc. The channel may be a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), etc. In the present disclosure, the control channel may mean a PDCCH, a PUCCH, or a PSCCH, and the data channel may mean a PDSCH, a PUSCH, or a PSSCH.

[0075] Next, methods for transmitting and receiving signals in a communication network (e.g., a communication system) will be described. In downlink communication, downlink data may be transmitted via a PDSCH. In uplink communication, uplink data may be transmitted via a PUSCH. In the present disclosure, a PDSCH may refer to downlink data and / or a resource through which the downlink data is transmitted and received, and a PUSCH may refer to uplink data and / or a resource through which the uplink data is transmitted and received. A base station may transmit downlink control information (DCI) including configuration information of the PDSCH (e.g., resource allocation information, scheduling information) through a physical downlink control channel (PDCCH). In the present disclosure, a PDCCH may refer to DCI (e.g., control information) and / or a resource through which the DCI is transmitted.

[0076] The terminal can receive DCI on the PDCCH and check the configuration information of the PDSCH included in the DCI. For example, the configuration information of the PDSCH may include time domain resource assignment (TDRA), frequency domain resource assignment (FDRA), transmission resource information for feedback on the PDSCH, and / or modulation and coding scheme (MCS) information. The TDRA may indicate the resource region of the PDSCH in the time domain. The FDRA may indicate the resource region of the PDSCH in the frequency domain. The MCS information may be an MCS level or an MCS index.

[0077] A base station can configure a bandwidth part (BWP) for downlink communication. The BWP can be configured differently for each terminal. The base station can inform the terminal of BWP configuration information using higher layer signaling. The number of BWPs configured for one terminal can be one or more. The terminal can receive BWP configuration information from the base station and check the BWP(s) configured by the base station based on the BWP configuration information. If multiple BWPs are configured for downlink communication, the base station can activate one or more BWPs among the multiple BWPs. The base station can transmit configuration information of the activated BWP(s) to the terminal using at least one of higher layer signaling, a medium access control (MAC) control element (CE), or DCI. The base station can perform downlink communication using the activated BWP(s). The terminal can identify the activated BWP(s) by receiving configuration information of the activated BWP(s) from the base station, and can perform a downlink reception operation (e.g., downlink communication) in the activated BWP(s).

[0078] In this disclosure, methods for monitoring PDCCH will be described. A terminal may perform a monitoring operation for a PDCCH to receive a PDSCH transmitted from a base station. The monitoring operation for the PDCCH may be referred to as a PDCCH monitoring operation. The base station may inform the terminal of configuration information for the PDCCH monitoring operation using a higher layer message (e.g., a radio resource control (RRC) message). The configuration information for the PDCCH monitoring operation may include CORESET (control resource set) information and / or search space information.

[0079] CORESET information may include PDCCH DMRS (demodulation reference signal) information, PDCCH precoding information, PDCCH occasion information, etc. The PDCCH DMRS may be a DMRS used to demodulate the PDCCH. The PDCCH occasion may be a region where the PDCCH can exist. In other words, the PDCCH occasion may be a region where DCI can be transmitted. The PDCCH occasion information may include time resource information and / or frequency resource information of the PDCCH occasion. In the time domain, the length of the PDCCH occasion may be indicated in symbol units. In the frequency domain, the size of the PDCCH occasion may be indicated in RB units (e.g., in PRB (physical resource block) units or CRB (common resource block) units).

[0080] The search space information may include a coreset identifier (ID) associated with the search space, a period and / or offset of PDCCH monitoring. Each of the period and offset of PDCCH monitoring may be indicated on a slot-by-slot basis. The search space information may further include an index of the symbol at which the PDCCH monitoring operation begins.

[0081] Next, paging methods in a communication network will be described. The state of a terminal (e.g., RRC state) can be divided into an RRC Connected state, an RRC Inactive state, and an RRC Idle state depending on the state of the RRC configuration (e.g., RRC connection) for the base station. The state of the terminal can change depending on the RRC configuration with the base station, etc. For example, if the terminal has established an RRC connection with the base station, the state of the terminal can be an RRC Connected state. If the RRC connection between the terminal and the base station is released, the state of the terminal can be changed to an RRC Idle state. If the RRC connection between the terminal and the base station is suspended, the state of the terminal can be changed to an RRC Inactive state.

[0082] Depending on the state of the terminal (e.g., RRC connected state, RRC inactive state, RRC idle state), the signal monitoring operation of the terminal may vary. In the RRC connected state, the terminal may perform the signal monitoring operation based on the configuration of the CORESET and search space. In the RRC inactive state or RRC idle state, the terminal may periodically perform the signal monitoring operation in a specific time interval according to the configuration of the terminal, and may not perform the signal monitoring operation in the remaining time intervals. The terminal not performing the signal monitoring operation may mean that the terminal operates in sleep mode. The terminal performing the signal monitoring operation may mean that the terminal operates in active mode.

[0083] Figure 6 is a conceptual diagram illustrating embodiments of signal monitoring operations in a communication network.

[0084] Referring to FIG. 6, a terminal can periodically perform a signal monitoring operation throughout the entire time interval. The signal monitoring operation can be performed in the signal monitoring interval. The signal monitoring interval can exist periodically. The base station can transmit configuration information of the signal monitoring interval to the terminal through signaling. The terminal can receive configuration information of the signal monitoring interval through signaling from the base station. The configuration information of the signal monitoring interval can include at least one of the time length of one signal monitoring interval, the period of the signal monitoring interval, or the time offset of the signal monitoring interval. The signal monitoring interval can include an on interval and an off interval. The configuration information of the signal monitoring interval can include information about the on interval and / or information about the off interval. The terminal can perform the signal monitoring operation in the on interval. The terminal may not perform the signal monitoring operation in the off interval. Since the signal monitoring operation of the terminal is not performed in the off interval within the signal monitoring interval, the power consumption of the terminal can be reduced.

[0085] Figure 7 is a conceptual diagram illustrating embodiments of RRC state changes of a terminal in a communication network.

[0086] Referring to FIG. 7, a terminal may perform a signal monitoring operation in an RRC inactive state or an RRC idle state (S701). The terminal may periodically perform the signal monitoring operation. The signal monitoring operation may be a paging signal monitoring operation. The base station may transmit a paging signal to the terminal (e.g., a terminal in an RRC inactive state or an RRC idle state) (S702). The time at which the base station transmits the paging signal may be within the signal monitoring period of the terminal (e.g., an on period within the signal monitoring period). The terminal may receive the paging signal from the base station. Upon receiving the paging signal, the terminal may transmit an RRC connected request to the base station (S703). The signal monitoring operation of the terminal after receiving the paging signal may differ from the signal monitoring operation of the terminal before receiving the paging signal. To change the RRC state of the terminal, the terminal may transmit and receive signals with the base station. According to the above-described operations, the RRC state of the terminal may be changed to the RRC connected state. The terminal can operate in an RRC connected state (S704).

[0087] A terminal can monitor a paging signal in an RRC inactive state or an RRC idle state. The signal monitoring operation for paging can be performed in the same or similar manner as in the embodiment of FIG. 6. The base station can transmit paging configuration information to the terminal through signaling. The paging configuration information can be included in a system information block (SIB) transmitted by the base station. The terminal can receive the paging configuration information through signaling from the base station. The paging configuration information can include at least one of a monitoring period for monitoring paging, a time offset of the monitoring period, or the length of a signal monitoring interval for paging. Paging (e.g., a paging signal, a paging message) can be transmitted through DCI. The terminal can perform PDCCH monitoring (e.g., PO (paging occasion) monitoring) to receive paging.

[0088] A terminal may periodically perform monitoring operations to receive paging signals while in the RRC inactive or RRC idle state. The terminal may not receive signals during periods when paging is not monitored. The above-described operations may reduce the power consumption of the terminal. In a communication network (e.g., a communication system), monitoring operations for other signals that consume less power than paging monitoring may be considered to reduce the power consumption of the terminal.

[0089] In order to save power during signal monitoring operations of a terminal in a communication network, a low-power wake-up signal (LP-WUS) and / or a low-power wake-up receiver (LP-WUR) may be considered. The power required for monitoring the low-power wake-up signal in the terminal may be less than the power required for monitoring paging in the terminal. The terminal may include a low-power wake-up receiver. The low-power wake-up receiver may be used to receive the low-power wake-up signal. The power consumption of the low-power wake-up receiver may be less than the power consumption of a conventional receiver (e.g., a receiver that receives paging). The terminal may include a conventional receiver and / or a low-power wake-up receiver. The terminal may receive conventional signals (e.g., paging) using the conventional receiver and may receive the low-power wake-up signal using the low-power wake-up receiver. The conventional receiver may refer to a main radio. In the present disclosure, a low-power wake-up signal may be conveniently referred to as a low-power signal or a wake-up signal, and a low-power wake-up receiver may be conveniently referred to as a low-power receiver or a wake-up receiver.

[0090] A base station can transmit a low-power wakeup signal. A terminal can monitor the low-power wakeup signal. The terminal can utilize a low-power wakeup receiver to monitor the low-power wakeup signal. The low-power wakeup receiver can be configured separately from the terminal's existing receiver (e.g., a signal receiver, a main radio). In other words, the terminal can include a low-power wakeup receiver and an existing receiver.

[0091] Figure 8 is a block diagram illustrating embodiments of communication nodes that constitute a communication network.

[0092] Referring to FIG. 8, a terminal may include a main radio and a low-power wake-up receiver (e.g., a low-power receiver). The main radio may refer to an existing receiver of the terminal. For example, the main radio and the low-power wake-up receiver may be configured within the same hardware, and within the same hardware, the main radio and the low-power wake-up receiver may be software-separated. For another example, the main radio and the low-power wake-up receiver may be configured with different hardware. The terminal may receive a signal via an antenna. The received signal may be transmitted to the main radio and / or the low-power wake-up receiver. For another example, the antennas for the main radio and the antennas for the low-power wake-up receiver may be configured independently within the terminal. In other words, the terminal may include a first antenna for the main radio and a second antenna for the low-power wake-up receiver. When a low-power wake-up signal is detected, the low-power wake-up receiver may transmit detection information of the low-power wake-up signal to the main radio. The main radio can receive detection information of a low-power wakeup signal from a low-power wakeup receiver. The main radio can transmit information for the operation of the low-power wakeup receiver to the low-power wakeup receiver, and the low-power wakeup receiver can receive information for the operation from the main radio.

[0093] The low-power wake-up signal may be a signal modulated using the On Off Keying (OOK) method. The low-power wake-up signal may include encoded information. In other words, the low-power wake-up signal may be transmitted in the form of encoded information. One or more of a channel code, a cyclic redundancy check (CRC), or repeated transmission may be applied to the information bits of the low-power wake-up signal, and the low-power wake-up signal may be transmitted. The low-power wake-up signal may be transmitted in the form of a sequence. Depending on the information that the base station wishes to transmit, the low-power wake-up signal may be composed of different sequences. The sequence may be a binary sequence.

[0094] The subcarrier spacing of the low-power wake-up signal may be the same as the subcarrier spacing used by the base station to transmit signals other than the low-power wake-up signal. For example, the subcarrier spacing of the low-power wake-up signal may be the same as the subcarrier spacing of the BWP (e.g., the subcarrier spacing configured for the BWP). In another example, the subcarrier spacing of the low-power wake-up signal may be indicated by the base station. The base station may transmit the subcarrier spacing information of the low-power wake-up signal to the terminal through a higher layer message or a system information block. The terminal may receive the subcarrier spacing information of the low-power wake-up signal from the base station through a higher layer message or a system information block. The terminal may receive the low-power wake-up signal based on the subcarrier spacing information.

[0095] For another example, a predefined value can be used as the subcarrier spacing of a low-power wake-up signal. The base station can transmit the low-power wake-up signal using the predefined subcarrier spacing. The terminal can receive the low-power wake-up signal using the predefined subcarrier spacing. For another example, if subcarrier spacing information of the low-power wake-up signal is received from the base station, the terminal can receive the low-power wake-up signal using the subcarrier spacing indicated by the base station. If the terminal does not receive subcarrier spacing information of the low-power wake-up signal from the base station, the terminal can receive the low-power wake-up signal using a predefined subcarrier spacing (e.g., a predefined value).

[0096] Monitoring for the reception of a low-power wake-up signal for a low-power wake-up receiver may be configured. The method for monitoring the low-power wake-up signal may be the same as or similar to the embodiment of FIG. 6. The monitoring operation for the low-power wake-up signal may be performed periodically. The monitoring period for the low-power wake-up signal may be configured periodically.

[0097] In this disclosure, methods for monitoring a low-power wake-up signal of a low-power wake-up receiver will be described.

[0098] A terminal can monitor a low-power wake-up signal. The base station can transmit information necessary for monitoring the low-power wake-up signal (e.g., monitoring configuration information) to the terminal via signaling. The terminal can receive information necessary for monitoring the low-power wake-up signal (e.g., monitoring configuration information) from the base station. The terminal can receive the monitoring configuration information from the base station via a system information block. The terminal can receive the monitoring configuration information from the base station via RRC signaling.

[0099] The monitoring configuration information may include at least one of the following: a monitoring period of a low-power wake-up signal, a time offset of the monitoring period of the low-power wake-up signal, or information on the length of the monitoring interval of the low-power wake-up signal. The terminal may perform monitoring of the low-power wake-up signal using the monitoring configuration information.

[0100] With respect to the monitoring period of the low-power wake-up signal, the monitoring period may be indicated to the terminal in units of a specific time interval. For example, the monitoring period may be indicated in units of frames. If the monitoring period is X frames, the terminal may perform monitoring of the low-power wake-up signal every X frames. X may be a natural number. For another example, the monitoring period may be indicated in units of subframes, slots, or symbols (e.g., OFDM symbols).

[0101] Regarding the length of the monitoring interval for the low-power wake-up signal, the length of the monitoring interval may be indicated in units of a specific time interval. For example, the length of the monitoring interval may be indicated in units of frames, subframes, slots, or symbols (e.g., OFDM symbols). The terminal may monitor the low-power wake-up signal during the monitoring interval.

[0102] Regarding the time offset of the monitoring period of the low-power wake-up signal, the time offset may refer to an offset from a specific time. The specific time may be referred to as a reference time or reference point. The monitoring period of the low-power wake-up signal may be repeated periodically from a time that is the time offset from the reference point. In other words, the monitoring period of the low-power wake-up signal may start from a time that is the time offset from the reference point. The reference point may be the start time of a frame, a subframe, or a symbol (e.g., an OFDM symbol). As another example, the reference point may be the paging monitoring position of the terminal. The reference point may be the start time of paging monitoring of the terminal. The base station may transmit reference point information to the terminal through signaling. The terminal may receive reference point information through signaling from the base station. Reference point information may be included in the monitoring configuration information. Alternatively, the reference point may be a paging frame (e.g., the start time of the paging frame) for which the terminal monitors the paging signal.

[0103] FIG. 9 is a conceptual diagram illustrating embodiments of a method for monitoring a low-power wake-up signal of a terminal in a communication network.

[0104] Referring to FIG. 9, a terminal may receive at least one of information on a monitoring period of a low-power wake-up signal, a time offset of the monitoring period of the low-power wake-up signal, or a length of a monitoring interval of the low-power wake-up signal from a base station. Using the information, the terminal may determine that a monitoring period (e.g., a monitoring interval) starts at a time after the time offset from a reference point, and may perform monitoring of the low-power wake-up signal during the monitoring interval (e.g., a signal monitoring interval). The monitoring operation of the low-power wake-up signal may be repeated according to the monitoring period. The start time of the monitoring interval of the low-power wake-up signal may be the same as the start time of the monitoring period. Alternatively, the start time of the monitoring interval of the low-power wake-up signal may be different from the start time of the monitoring period. In this case, an offset indicating the time from the start time of the monitoring period to the start time of the monitoring interval of the low-power wake-up signal may be required, and the offset may be set in the terminal by the base station.

[0105] With respect to the time offset of the monitoring period of the low-power wake-up signal, the reference point of the time offset may be another signal monitoring period of the terminal (e.g., a monitoring period of another signal). The other signal may be referred to as a first signal. The base station may instruct the terminal to perform monitoring (e.g., periodic monitoring) for the first signal other than the low-power wake-up signal. The terminal may confirm the instruction of the base station. The time offset of the monitoring period of the low-power wake-up signal may indicate the time from the first signal monitoring period (e.g., a start time or end time of the monitoring period) to the monitoring period of the low-power wake-up signal (e.g., a start time of the monitoring period). The first signal monitoring may mean monitoring for the first signal, and the first signal monitoring period may mean a monitoring period of the first signal.

[0106] The first signal monitoring (e.g., periodic monitoring) may be monitoring performed by a low-power wake-up receiver. Alternatively, the first signal monitoring (e.g., periodic monitoring) may be monitoring performed by a main radio other than the low-power wake-up receiver. The first signal monitoring (e.g., periodic monitoring) may be monitoring for a paging signal. The first signal monitoring period may be a paging occasion. The first signal monitoring period may be a synchronization signal block (SSB) transmission period of the base station. The time offset of the monitoring period of the low-power wake-up signal may be a time offset from the start time of the "drx-onDurationTimer" of the terminal.

[0107] A time offset of a monitoring period of a low-power wake-up signal may be set such that a monitoring interval of a low-power wake-up signal precedes another monitoring interval (e.g., a first signal monitoring interval) in the time domain. In other words, a time offset of a monitoring period of a low-power wake-up signal may be set such that a monitoring operation of the low-power wake-up signal is performed before a monitoring operation of another signal (e.g., a first signal) in the time domain. In the time domain, a monitoring interval of a low-power wake-up signal may be instructed (e.g., set) to precede another monitoring interval by a time offset. The time offset of the monitoring period of the low-power wake-up signal may indicate an offset from a start time of the first signal monitoring interval to a start time or an end time of the monitoring interval of the low-power wake-up signal. Alternatively, the time offset of the monitoring period of the low-power wake-up signal may indicate an offset from an end time of the first signal monitoring interval to a start time or an end time of the monitoring interval of the low-power wake-up signal.

[0108] With respect to the monitoring period of the low-power wake-up signal, when the reference point of the time offset is the first signal monitoring section, the monitoring period of the low-power wake-up signal may be configured in units of the first signal monitoring period. For example, when the first signal monitoring period is T, the monitoring period of the low-power wake-up signal may be set to a multiple of T. The monitoring period of the low-power wake-up signal may be T, 2T, 3T, etc. T may be X frames, X subframes, X slots, or X symbols. X may be a natural number. The monitoring period of the low-power wake-up signal may be set to a multiple of 2 of T. The monitoring period of the low-power wake-up signal may be T, 2T, 4T, etc.

[0109] For another example, if the first signal monitoring period is T, the monitoring period of the low-power wake-up signal can be set to a divisor of T. In other words, the monitoring period of the low-power wake-up signal can be set to 1 / N times T. N can be a natural number. The monitoring period of the low-power wake-up signal can be T, T / 2N, T / 3N, etc. N can be set in the form of a multiple of 2. In this case, the monitoring period of the low-power wake-up signal can be T, T / 2N, T / 4N, etc. The base station can instruct (e.g., set) the monitoring period of the low-power wake-up signal to the terminal. If the monitoring period of the low-power wake-up signal is not instructed to the terminal, the monitoring period of the low-power wake-up signal of the terminal can be set to be the same as the first signal monitoring period. In other words, the terminal can estimate (e.g., expect) that the monitoring period of the low-power wake-up signal is the same as the first signal monitoring period. If the first signal monitoring period is T and the monitoring period of the low-power wake-up signal is not indicated to the terminal, the monitoring period of the low-power wake-up signal of the terminal can be set to T.

[0110] The monitoring cycle of the low-power wake-up signal can be set to be the same as the "drx-cycle" of the terminal. "drx-cycle" can mean "long drx-cycle" or "short drx-cycle." If "the terminal does not receive a setting for the monitoring cycle of the low-power wake-up signal from the base station" or "the base station does not set the monitoring cycle of the low-power wake-up signal to the terminal," the terminal can monitor the low-power wake-up signal using a cycle identical to the "drx-cycle."

[0111] With respect to the length of the monitoring interval of the low-power wake-up signal, if the reference point of the time offset is the first signal monitoring interval (e.g., the start time or end time of the interval), the length of the monitoring interval of the low-power wake-up signal may be set to be equal to the length of the first signal monitoring time interval. In other words, the terminal may estimate (e.g., expect) that the length of the monitoring interval of the low-power wake-up signal is equal to the length of the first signal monitoring interval. If the length of the monitoring interval of the low-power wake-up signal is indicated to the terminal, the terminal may monitor the low-power wake-up signal during the monitoring interval having the indicated length. If the length of the monitoring interval of the low-power wake-up signal is not indicated to the terminal, the terminal may perform monitoring of the low-power wake-up signal in the monitoring interval having the same length as the first signal monitoring interval.

[0112] With respect to the time offset of the monitoring period of the low-power wake-up signal, the base station can determine the time offset (e.g., the length of the time offset) based on information received from the terminal. The base station can determine the minimum length of the time offset based on information received from the terminal.

[0113] The time from the time when a low-power wake-up signal is received by the low-power wake-up receiver of the terminal to the time when it is determined whether to wake up the terminal (e.g., the main radio of the terminal) based on the low-power wake-up signal may be defined as a signal processing time (e.g., a signal processing time of the low-power wake-up receiver). The time from the time when the main radio of the terminal (e.g., the main radio in sleep mode) receives an instruction (e.g., a wake-up instruction) from the low-power wake-up receiver to the time when the main radio can receive a signal (e.g., the start time when the main radio operates in wake-up mode) may be defined as a wake-up time (e.g., a wake-up time of the main radio). The time required for a change from a state in which the main radio of the terminal can receive a signal to a state in which the main radio of the terminal acquires time and frequency synchronization from the base station (e.g., a state in which the main radio can demodulate a signal) may be defined as a synchronization time (e.g., a synchronization time of the main radio).

[0114] The terminal may transmit to the base station at least one of information regarding the signal processing time of the low-power wake-up receiver, information regarding the wake-up time of the main radio, or information regarding the synchronization time of the main radio. The at least one piece of information may be included in UE capability information transmitted by the terminal to the base station. The base station may receive the at least one piece of information from the terminal. The base station may determine a time offset of a monitoring period of the low-power wake-up signal using at least one piece of information regarding the signal processing time of the low-power wake-up receiver, information regarding the wake-up time of the main radio, or information regarding the synchronization time of the main radio received from the terminal. The base station may determine a minimum value of the time offset of the monitoring period of the wake-up signal using the at least one piece of information received from the terminal, and may determine the time offset based on the minimum value.

[0115] For another example, the terminal may determine a wakeup delay time by considering at least one of a signal processing time of a low-power wakeup receiver, a wakeup time of a main radio, or a synchronization time of the main radio, and may transmit information about the wakeup delay time to the base station. The base station may receive information about the wakeup delay time from the terminal. The wakeup delay time may mean a minimum time (e.g., a minimum time length) from the time when a low-power wakeup signal is received by a low-power wakeup receiver (e.g., the terminal) to the time when the main radio (e.g., the terminal) performs PDCCH monitoring. The terminal may transmit UE capability information including information about the wakeup delay time to the base station. The terminal may transmit information about at least one (e.g., a minimum time) among one or more wakeup delay times (e.g., one or more candidate times) to the base station. For example, the terminal may transmit information about one or more wakeup delay times among three wakeup delay times to the base station. The three wakeup delay times may be times depending on the terminal's sleep mode (e.g., sleep state). The three wakeup delay times may be different times.

[0116] The base station can determine one or more time offsets of the monitoring period of the low-power wake-up signal using the wake-up delay time indicated by the terminal. For example, the base station can determine the minimum value of the time offset of the monitoring period of the wake-up signal using information about the wake-up delay time received from the terminal, and determine one or more time offsets based on the minimum value.

[0117] The base station can transmit one or more time offsets determined based on the above-described method to the terminal via signaling. The base station can transmit an SIB including one or more time offsets to the terminal. The base station can transmit a higher layer message (e.g., an RRC configuration, an RRC message) including one or more time offsets to the terminal. The terminal can receive one or more time offsets from the base station. The terminal can receive one or more time offsets via a higher layer message (e.g., an RRC configuration, an RRC message). The terminal can receive one or more time offsets via an SIB.

[0118] If an interval between a Low-power wakeup signal Occasion (LO) and a Paging Occasion (PO) according to one of one or more time offsets is equal to or greater than a wakeup delay time, the terminal may monitor for a low-power wakeup signal in the LO according to the one time offset. If a low-power wakeup signal is detected in the LO (e.g., if the low-power wakeup signal detected in the LO includes a wake-up instruction of the terminal), the terminal may perform PO monitoring or PDCCH monitoring in the PO associated with the LO.

[0119] For another example, if an interval between a LO and a PO according to a largest time offset among one or more time offsets is greater than (or exceeds) a wakeup delay time, the terminal may monitor for a low-power wakeup signal on the LO according to a smallest time offset indicating an interval between the LO and the PO that is greater than (or exceeds) the wakeup delay time among the one or more time offsets. When a low-power wakeup signal is detected on the LO (e.g., when the low-power wakeup signal detected on the LO includes a wakeup instruction of the terminal), the terminal may perform PO monitoring or PDCCH monitoring on the PO associated with the LO.

[0120] FIG. 10 is a conceptual diagram illustrating embodiments of a method for monitoring a low-power wake-up signal of a terminal in a communication network.

[0121] Referring to FIG. 10, a base station can transmit an instruction to monitor a signal (e.g., periodic monitoring) to a terminal via signaling. The terminal can receive an instruction to monitor a signal (e.g., periodic monitoring) via signaling from the base station. The terminal can perform monitoring (e.g., periodic monitoring) of the signal based on the instruction from the base station. The periodic monitoring may be monitoring for a paging occasion. The monitoring for a paging occasion may mean PDCCH monitoring. The periodic monitoring may be monitoring according to a DRX (discontinuous reception) setting instructed to the terminal.

[0122] A base station can signal a time offset for periodic monitoring to a terminal (e.g., set a time offset). The terminal can receive the time offset for periodic monitoring through signaling from the base station. The terminal can use the time offset indicated by the base station to set (e.g., determine) a monitoring interval for a low-power wake-up signal and perform monitoring of the low-power wake-up signal in the monitoring interval. The terminal can perform monitoring of the low-power wake-up signal in a monitoring interval that is earlier than a signal monitoring interval (e.g., another signal monitoring interval, a first signal monitoring interval) by the time offset. If the monitoring interval for the low-power wake-up signal is indicated to the terminal, the terminal can perform monitoring of the low-power wake-up signal based on the monitoring interval. If the monitoring interval for the low-power wake-up signal is not indicated to the terminal, the terminal can perform monitoring of the low-power wake-up signal using the same interval as the periodic monitoring. When the length of the monitoring interval of the low-power wake-up signal is indicated to the terminal, the terminal can perform monitoring of the low-power wake-up signal in the monitoring interval having the indicated length.

[0123] The monitoring interval of the low-power wake-up signal will be described. The monitoring interval of the low-power wake-up signal can be defined as a low-power wake-up signal occasion. The low-power wake-up signal occasion can be referred to as a low-power wake-up signal occasion (LO). The LO can refer to a time resource and / or frequency resource in which the low-power wake-up signal can be transmitted or detected. The LO can be set periodically in the time domain, identical to or similar to the monitoring interval of the low-power wake-up signal.

[0124] There may be a low-power wakeup signal monitoring occasion within an LO where a low-power wakeup signal is actually transmitted. The low-power wakeup signal monitoring occasion may be referred to as a MO (low-power wakeup signal Monitoring Occasion). An MO may be a unit of resource where an actual low-power wakeup signal is transmitted. One or more MOs may exist within an LO. One or more MOs may be configured within an LO in the time domain. In other words, one or more MOs may be configured in a TDM (time domain multiplexing) manner. One or more MOs may be configured within an LO in the frequency domain. In other words, one or more MOs may be configured in a FDM (frequency domain multiplexing) manner.

[0125] In the time domain, low-power wake-up signals from different MOs within a LO can be transmitted using different beams. In other words, the low-power wake-up signals can be transmitted based on a beam sweeping scheme. In the frequency domain, different MOs within a LO can be MOs monitored by different terminals or different terminal groups. A terminal group can include one or more terminals. Different MOs configured in the same time interval within a LO (e.g., MOs multiplexed in the frequency domain) can be MOs monitored by different terminals or different terminal groups. Low-power wake-up signals from different MOs (e.g., multiple MOs) within a LO can be transmitted using the same beam, and the different MOs can be MOs monitored by different terminals or different terminal groups.

[0126] FIG. 11 is a conceptual diagram illustrating embodiments of setting up a low-power wake-up signal occasion (e.g., LO) and a low-power wake-up signal monitoring occasion (e.g., MO) in a communication network.

[0127] Referring to Fig. 11, there can be M MOs within one LO in the time domain. M can be a natural number. There can be N MOs within one LO in the frequency domain. N can be a natural number. The MO index can start from an early resource in the time domain. The MO index can start from a low subcarrier in the frequency domain. The MOs can be indexed based on a frequency-first scheme or a time-first scheme. When the frequency-first scheme is used, the MOs can be indexed first in the frequency domain and then in the time domain. When the time-first scheme is used, the MOs can be indexed first in the time domain and then in the frequency domain.

[0128] MOs multiplexed in the frequency domain can be assigned to different terminals or different terminal groups as locations where they monitor low-power wake-up signals. The location (e.g., MO) where a terminal (or a terminal group) monitors a low-power wake-up signal in the frequency domain can be determined based on an identifier (ID) of the terminal or an ID of the terminal group. The location (e.g., MO) of time resources and / or frequency resources where a terminal (or a terminal group) monitors a low-power wake-up signal can be determined based on the terminal ID or the ID of the terminal group according to the configuration of a communication system (e.g., a communication network). For example, the location where a terminal performs signal monitoring can be determined as at least one MO from MO #0 to MO #(2N-1) based on the terminal ID or the terminal group ID. The terminal can monitor the low-power wake-up signal in at least one MO.

[0129] In the time domain, the low-power wake-up signal in the multiplexed MOs may be transmitted using different beams. For example, the beam used for transmitting the low-power wake-up signal in MO #0 may be different from the beam used for transmitting the low-power wake-up signal in MO #N. Although the low-power wake-up signal in MO #0 and the low-power wake-up signal in MO #N are transmitted using different beams, the low-power wake-up signal in MO #0 and the low-power wake-up signal in MO #N may be the same signal. The same signal may mean a signal containing the same content. The configuration of the transmission beams within the LO in the time domain may vary based on the total number of beams used for transmitting the low-power wake-up signal.

[0130] For example, if there are M MOs within an LO in the time domain and T beams (e.g., transmit beams) are used for transmitting a low-power wake-up signal, one beam can be assigned (e.g., set, linked) to M / T MOs. In other words, the low-power wake-up signal can be transmitted using the same beam in M / T MOs in the time domain. T can be a natural number. When M=T, the low-power wake-up signal can be transmitted using different beams in different MOs in the time domain. When M=2T, the same beam can be assigned to MO #0 to MO #(2N-1), and the same beam can be assigned to MO #2N to MO #(4N-1). The beams assigned to MO #0 to MO #(2N-1) can be different from the beams assigned to MO #2N to MO #(4N-1).

[0131] In the time domain, beams can be assigned to MOs based on an interlace scheme (e.g., time interlace scheme). For example, the same beam can be assigned to MO #0 to MO #(N-1), and the same beam can be assigned to MO #T / 2 to MO #(T / 2+N-1). The beams assigned to MO #0 to MO #(N-1) can be different from the beams assigned to MO #T / 2 to MO #(T / 2+N-1).

[0132] In the time domain, one MO (e.g. one MO region) will be described.

[0133] A MO can be configured for a single slot. In other words, a MO can encompass a single slot. The MO can be configured for all symbols within a single slot (e.g., all OFDM symbols). For another example, a MO can be configured for some symbols within a single slot (e.g., OFDM symbols). In the present disclosure, a symbol may refer to an OFDM symbol.

[0134] For another example, a MO can be set to one or more slots. A MO can be set to a multiple of a slot. A MO can be set to all symbols contained in N slots, where N can be a natural number. A MO can be set to all symbols contained in N slots and some symbols contained in M ​​slots, where M can be a natural number.

[0135] When an MO is set to all symbols in N slots and some symbols in M ​​slots, the MO can be set using early resources in the time domain. For example, when an MO is set across slots #1 to #K, the MO can be set to all symbols in slots #1 to #K-1 and early symbols in slot #K.

[0136] For another example, if an MO is set to all symbols in N slots and some symbols in M ​​slots, the MO can be set to utilize late resources in the time domain. For example, if an MO is set to span slots #1 through #K, the MO can be set to all symbols in slots #2 through #K and the late symbols in slot #1.

[0137] For another example, if an MO is set to all symbols in N slots and some symbols in M ​​slots, the MO can be set using intermediate resources in the time domain. An intermediate resource can be a resource located in the middle of the time domain. For example, if an MO is set across slots #1 to #K, the MO can be set to the late symbols in slot #1, all symbols in slots #2 to #K-1, and the early symbols in slot #K.

[0138] If the length of one MO in the time domain does not match the length of one slot, the MO can be set using one or more of the parameters below.

[0139] - LO start time

[0140] - Start time of the first MO

[0141] - Length of MO in the time domain

[0142] - Number of MOs within LO

[0143] The base station can transmit one or more of the above-described parameters to the terminal through signaling. The terminal can receive one or more parameters through signaling from the base station. The terminal can identify the MO (e.g., MO configuration) based on one or more parameters indicated by the base station. For example, if the terminal receives the start time of the LO (or the start time of the first MO), the length of the MO in the time domain, and the number of MOs (= J) within the LO from the base station, the terminal can determine that J MOs are configured consecutively in the time domain from the start time of the LO (or the start time of the first MO). The terminal can distinguish different MOs using the length of the MO and the start time of the LO (or the start time of the first MO) in the time domain.

[0144] In the time domain, the setting of MO may vary depending on whether the low-power wake-up signal is repeatedly transmitted. In the time domain, if the low-power wake-up signal is repeatedly transmitted N times, the length of one MO may be N times the length of one MO if the low-power wake-up signal is not repeatedly transmitted. N may be a natural number. As another example, in the time domain, if the low-power wake-up signal is repeatedly transmitted N times, the length of one MO may be the same as the length of one MO if the low-power wake-up signal is not repeatedly transmitted. The low-power wake-up signal may be repeatedly transmitted in time resources corresponding to N MOs.

[0145] The MO configuration within an LO will be described. There can be one or more MOs within an LO. The one or more MOs within an LO can exist in different time intervals. In other words, one or more MOs can be multiplexed in the time domain. For another example, one or more MOs within an LO can exist in different frequency intervals. In other words, one or more MOs can be multiplexed in the frequency domain. For another example, one or more MOs within an LO can exist in different time intervals and different frequency intervals. In other words, one or more MOs can be multiplexed in the time domain and the frequency domain.

[0146] There can be K MOs associated with (e.g., mapped to) each beam within one LO. K can be a natural number. The K MOs can be divided into M MO groups. One MO group can include one or more MOs. M can be a natural number. The low-power wake-up signals transmitted from each of the M MO groups can include different information. In other words, the low-power wake-up signal transmitted from the first MO group and the low-power wake-up signal transmitted from the second MO group can include different information. Alternatively, different low-power wake-up signals can be transmitted within one MO group. The different low-power wake-up signals can include different information.

[0147] Each of the M MO groups may include R MOs. R may be a natural number. The low-power wake-up signals transmitted from the R MOs may contain the same information. In other words, the same low-power wake-up signal may be transmitted from the R MOs. The same low-power wake-up signal or the same information may be repeatedly transmitted from the R MOs. The terminal may monitor K MOs in the LO to receive the low-power wake-up signal.

[0148] There may be K MOs associated with (e.g., mapped to) each beam within one LO, and the K MOs may be divided into G MO groups. Each of K and G may be a natural number. Each of the G MO groups may be divided into M MO subgroups. M may be a natural number. A low-power wake-up signal transmitted in each of the M MO subgroups may include different information. For example, information included in a low-power wake-up signal transmitted in a first MO subgroup may be different from information included in a low-power wake-up signal transmitted in a second MO subgroup. Different low-power wake-up signals may be transmitted in each of the M MO subgroups. Different low-power wake-up signals may include different information.

[0149] Each of the M MO subgroups may include R MOs. R may be a natural number. Low-power wake-up signals transmitted from the R MOs may include the same information. The same low-power wake-up signals may be transmitted from the R MOs. The same low-power wake-up signals may mean signals including the same information. The same low-power wake-up signal or the same information may be repeatedly transmitted from the R MOs. The terminal may monitor some of the K MOs in the LO to receive a low-power wake-up signal. For example, the terminal may monitor one or more MO groups (e.g., one or more MO subgroups) among the G MO groups in the LO to receive a low-power wake-up signal. The MO group (e.g., MO subgroup) for which the terminal performs monitoring may be determined based on the subgroup ID of the terminal. The terminal may monitor one or more MO groups (e.g., one or more MO subgroups) associated with the terminal's subgroup ID among the MO groups (e.g., MO subgroups) to receive a low-power wake-up signal.

[0150] The information contained in low-power wake-up signals transmitted using different beams within a single LO may be set identically. The information contained in low-power wake-up signals transmitted from different LOs may be set differently.

[0151] A low-power wake-up signal and an SSB can be transmitted using the same beam. The terminal can assume that the low-power wake-up signal is a SSB and a QCL (quasi-co-location). One low-power wake-up signal can have a QCL relationship with one SSB. A mapping relationship between one SSB and one or more MOs and / or a mapping relationship between one or more SSBs and one MO can be set in the terminal by the base station. A transmission beam (e.g., QCL) of one or more low-power wake-up signals transmitted from one or more MOs mapped to one SSB can be identical to a transmission beam (e.g., QCL) of the one SSB. The terminal can receive at least one SSB from a base station, determine one SSB (e.g., an optimal SSB) from among the at least one SSB, determine one or more MOs mapped to the one SSB based on a mapping relationship set by the base station, and perform monitoring of a low-power wake-up signal based on the same QCL (e.g., a transmission beam) as the one SSB in the one or more MOs.

[0152] For another example, a low-power wake-up signal and a reference signal (e.g., CSI-RS) may be transmitted using the same beam. The terminal may assume that the low-power wake-up signal is QCL with the reference signal. One low-power wake-up signal may have a QCL relationship with one reference signal. A mapping relationship between one reference signal and one or more MOs and / or a mapping relationship between one or more reference signals and one MO may be configured in the terminal by the base station. If a mapping relationship between reference signal(s) and MO(s) is not configured, the terminal may assume that the mapping relationship between the reference signal(s) and MO(s) is the same as the mapping relationship between SSB(s) and MO(s). A transmission beam (e.g., QCL) of one or more low-power wake-up signals transmitted in one or more MOs mapped to one reference signal may be the same as a transmission beam (e.g., QCL) of the one or more reference signals. The terminal can receive at least one reference signal from a base station, determine one reference signal (e.g., an optimal reference signal) from among the at least one reference signal, determine one or more MOs mapped to the one reference signal based on a mapping relationship set by the base station, and perform monitoring of a low-power wake-up signal based on the same QCL (e.g., a transmission beam) as the one reference signal in the one or more MOs.

[0153] The ID of a terminal group will be described. In a communication system (e.g., a communication network), a terminal may have a unique ID. In the communication system, one or more groups (e.g., one or more terminal groups) for one or more terminals may be configured, and an ID of the terminal group may be assigned. A terminal group may include one or more terminals. To determine the ID of a terminal group to which a terminal belongs, one or more variables (e.g., one or more system environment variables) may be used. To determine the ID of a terminal group, at least one of the ID of the terminal, the number of terminal groups, the number of paging frames within a unit interval, the number of paging occasions within a paging frame, the number of LOs corresponding to a paging occasion, or the number of MOs within an LO may be used. A low-power wake-up signal monitoring occasion (MO) may be assigned differently depending on the ID of the terminal group. A terminal may monitor for reception of a low-power wake-up signal in a low-power wake-up signal monitoring occasion determined based on the ID of the terminal group. Alternatively, the core network (or base station) can assign a terminal group ID to the terminal. The terminal can verify the terminal group ID assigned by the core network (or base station).

[0154] A base station can instruct wake-up for terminals having an ID of a terminal group by transmitting a low-power wake-up signal in a low-power wake-up signal occasion corresponding to the ID of the terminal group. A terminal can receive a low-power wake-up signal by performing monitoring in a low-power wake-up signal occasion corresponding to the ID of the terminal group to which the terminal belongs. The terminal can confirm a wake-up instruction for the terminal based on the low-power wake-up signal. When a low-power wake-up signal is received (e.g., when a wake-up instruction is confirmed), the terminal can perform PDCCH monitoring and / or PO monitoring.

[0155] A base station can perform a wake-up instruction to wake up a terminal. The base station performing the wake-up instruction may mean that the base station transmits a low-power wake-up signal. The base station can use a bitmap to indicate whether to wake up each terminal group. The bitmap may include one or more bits, and each bit included in the bitmap may correspond to each terminal group. The base station may toggle a bit corresponding to a terminal group that is a target of the wake-up instruction (e.g., a terminal group that requires a wake-up) and may not toggle a bit corresponding to a terminal group that is not a target of the wake-up instruction (e.g., a terminal group that does not require a wake-up). The base station can instruct one or more terminal groups to wake up by transmitting a bitmap including the above-described bits. The bitmap may mean a low-power wake-up signal. In other words, the bitmap may be included in a low-power wake-up signal. A terminal may receive a low-power wake-up signal (e.g., a bitmap) from the base station. If the bit of the terminal group to which the terminal belongs is toggled in the bitmap received from the base station, the terminal may determine that a wake-up is requested, and the terminal may perform a wake-up operation. The low-power wake-up signal may be received by the low-power wake-up receiver of the terminal, and the wake-up operation may mean an operation of waking up the main radio of the terminal. If the bit of the terminal group to which the terminal belongs is not toggled in the bitmap received from the base station, the terminal may determine that a wake-up is not requested, and the terminal may not perform the wake-up operation.

[0156] For another example, a base station can instruct a wake-up for a terminal group by transmitting an ID of the terminal group that is the target of the wake-up instruction. The ID of the terminal group can be included in a low-power wake-up signal. In other words, the base station can transmit a low-power wake-up signal including the ID of the terminal group. A terminal can receive the ID of the terminal group (e.g., a low-power wake-up signal including the ID of the terminal group) from the base station. If the terminal belongs to a terminal group having an ID indicated by the base station, the terminal can perform a wake-up operation. If the terminal does not belong to a terminal group having an ID indicated by the base station, the terminal may not perform the wake-up operation.

[0157] For another example, a base station can instruct a wake-up of a terminal group corresponding to a code point by transmitting a code point indicating a wake-up for one or more terminal groups. A code point may correspond to a sequence or a piece of information transmitted via a low-power wake-up signal. A code point may be mapped to one or more terminal groups. A terminal group may include one or more terminals. A code point may be mapped to one terminal group. Alternatively, a code point may be mapped to multiple terminal groups or all terminal groups. A code point that individually instructs a wake-up for each of the terminal groups may be configured. For example, if there are N terminal groups, N code points indicating a wake-up for each of the N terminal groups may be configured. Alternatively, a code point indicating a wake-up for all terminal groups may be configured. For example, if there are N terminal groups, one code point indicating a wake-up for all of the N terminal groups may be configured. The base station can transmit configuration information of code point(s) to the terminal through signaling. The terminal can receive configuration information of code point(s) through signaling from the base station. For example, N can be 31. In this case, 31 code points indicating wake-up for each of the 31 terminal groups and 1 code point indicating wake-up for all 31 terminal groups can be configured. In other words, 32 code points can be configured.

[0158] The operation of the terminal according to the mapping of low-power wake-up signal occasions (LO) and paging occasions (PO) will be described.

[0159] LOs can be mapped one-to-one with POs. The terminal can detect a low-power wake-up signal by monitoring in a low-power wake-up signal occasion. If the detected low-power wake-up signal indicates a wake-up of the terminal, the terminal can monitor for the paging signal in a paging occasion (e.g., a predefined paging occasion). The paging occasion in which monitoring for the paging signal (e.g., paging monitoring) is performed can be mapped to the low-power wake-up signal occasion in which the low-power wake-up signal is detected (e.g., received). If the detected low-power wake-up signal does not indicate a wake-up of the terminal, the terminal may not monitor for the paging signal in the paging occasion.

[0160] Fig. 12 is a conceptual diagram illustrating embodiments of a mapping method of LO and PO in a communication network.

[0161] Referring to FIG. 12, one LO can be mapped to one PO. The terminal can detect a low-power wake-up signal in one LO. If the detected low-power wake-up signal indicates a wake-up of the terminal, the terminal can perform paging monitoring or PDCCH monitoring in the PO mapped to the LO (e.g., the LO from which the low-power wake-up signal is detected). For another example, one LO can be mapped to one or more POs. The terminal can detect a low-power wake-up signal in one LO. One or more POs can be mapped to the LO from which the low-power wake-up signal is detected. One LO can be mapped to N POs. For example, N can be 2 or 4. When one LO is mapped to one or more POs, the number of code points transmitted through one low-power wake-up signal can be the same as the number of code points transmitted through one low-power wake-up signal when one LO is mapped to one PO. When one LO is mapped to one or more POs, the number of code points transmitted through one LO may be the same as the number of code points transmitted through one LO when one LO is mapped to one PO.

[0162] The terminal can identify a PO to be monitored for detection of a paging signal among the one or more POs based on information included in the low-power wake-up signal. Information indicating a PO to be monitored for detection of a paging signal can be included in the payload of the low-power wake-up signal. For example, the base station can transmit information on a PO (hereinafter referred to as a "target PO") for which the terminal performs monitoring for detection of a paging signal among the one or more POs to the terminal. The base station can transmit information on a terminal or a terminal group that performs monitoring for detection of a paging signal at the target PO to the terminal. The terminal can receive information on the target PO and / or information on a terminal or a terminal group that monitors a paging signal at the target PO from the base station. The terminal can determine whether to perform a monitoring operation for detection of a paging signal at the PO based on the information received from the base station. The terminal can identify a time domain (e.g., a position of the PO in the time domain) of a PO that the terminal monitors for detection of a paging signal based on the information received from the base station.

[0163] Information about the target PO can be instructed (e.g., set) in advance to the terminal. "If a low-power wake-up signal is detected from the LO and the low-power wake-up signal includes a wake-up instruction for the terminal," the terminal can perform PO monitoring or PDCCH monitoring in the instructed PO (e.g., the target PO). The target PO can be indicated by a time offset between the target PO and the LO. For example, the base station can instruct (e.g., set) the monitoring period and / or offset for PO monitoring to the terminal. The terminal can check the monitoring period and / or offset indicated by the base station. The terminal can check the time domain of the target PO in which PO monitoring is performed based on the monitoring period and / or offset.

[0164] The terminal can check the information of the paging frame. The base station can transmit a low-power wake-up signal to the terminal at a PO monitoring location (e.g., PO) to indicate whether PO monitoring is performed. To detect the low-power wake-up signal, the terminal can perform monitoring for detecting the low-power wake-up signal at the LO. The base station can indicate to the terminal a time offset between the PO monitoring location (e.g., PO) and the LO monitoring location (e.g., LO). The terminal can check the time offset indicated by the base station. Using the time offset, the terminal can check the LO time domain (e.g., information in the LO time domain) for detecting the low-power wake-up signal.

[0165] Information about a terminal monitoring a paging signal in a PO can be transmitted (e.g., indicated) via the ID of the terminal group. When a wake-up instruction is received for a terminal group to which the terminal belongs, the terminal can perform signal monitoring in the PO. The base station can transmit information about a PO on which paging monitoring or PDCCH monitoring is performed via a low-power wake-up signal. The terminal can check information about a PO on which paging monitoring or PDCCH monitoring is performed based on the low-power wake-up signal received from the base station. The terminal can perform paging monitoring or PDCCH monitoring in the PO indicated by the low-power wake-up signal.

[0166] Fig. 13 is a conceptual diagram illustrating embodiments of a mapping method of LO and PO in a communication network.

[0167] Referring to FIG. 13, one LO can be mapped to one or more POs. The base station can transmit a low-power wake-up signal within one LO. The low-power wake-up signal can include information on a PO for which paging monitoring or PDCCH monitoring is performed among one or more POs to which the one LO is mapped. The terminal can receive the low-power wake-up signal from the base station in the LO. The terminal can check information on a PO for which the terminal is monitoring among one or more POs based on the received low-power wake-up signal. The terminal can check whether the terminal is performing paging monitoring or PDCCH monitoring based on the received low-power wake-up signal.

[0168] For another example, a PO may be mapped to one or more LOs. A PO may include one or more PO subgroups. A PO subgroup may be mapped to one LO. A terminal may detect a low-power wake-up signal from one LO. If the low-power wake-up signal detected from one LO indicates a wake-up of the terminal, the terminal may perform paging monitoring or PDCCH monitoring in the PO subgroup mapped to the one LO. If a low-power wake-up signal is detected from one LO, the terminal may not perform paging monitoring or PDCCH monitoring in another PO subgroup within the PO to which the PO subgroup to which the one LO is mapped belongs.

[0169] Fig. 14 is a conceptual diagram illustrating embodiments of a mapping method of LO and PO in a communication network.

[0170] Referring to FIG. 14, LO #1 and LO #2 may be mapped to PO. PO may include PO subgroup #1 and PO subgroup #2. LO #1 may be mapped to PO subgroup #1. LO #2 may be mapped to PO subgroup #2. The terminal may monitor a low-power wake-up signal in LO #1 or LO #2. The terminal may receive a low-power wake-up signal in LO #1. If the low-power wake-up signal received in LO #1 indicates a wake-up of the terminal, the terminal may perform paging monitoring or PDCCH monitoring in PO subgroup #1 mapped to LO #1. In this case, the terminal may not perform monitoring in LO #2 to receive a low-power wake-up signal. The terminal may receive a low-power wake-up signal in LO #2. The monitoring operation of the low-power wake-up signal in LO #2 may be performed when a low-power wake-up signal is not received in LO #1. When a low-power wake-up signal received from LO #2 indicates a wake-up of the terminal, the terminal may perform paging monitoring or PDCCH monitoring in PO subgroup #2 mapped to LO #2.

[0171] For another example, one or more MO groups within an LO may be mapped to one PO. One PO may include one or more PO subgroups. One PO subgroup may be mapped to one MO group within an LO. A terminal may detect a low-power wake-up signal in an MO group within an LO. If the low-power wake-up signal detected in an MO group indicates a wake-up of the terminal, the terminal may perform paging monitoring or PDCCH monitoring in the PO subgroup mapped to the MO group. If a low-power wake-up signal is detected in one MO group within an LO, the terminal may not perform monitoring of the low-power wake-up signal in the remaining MO groups within the LO.

[0172] For another example, the mapping between POs and LOs may not be defined (e.g., configured). In this case, if a low-power wake-up signal is detected in an LO, the terminal may perform paging monitoring or PDCCH monitoring on a PO existing after the wake-up delay time (e.g., the earliest PO or all POs). The wake-up delay time may start from the LO on which the low-power wake-up signal is received (e.g., the start time or end time of the LO).

[0173] In a communication network, carrier aggregation can be configured. In other words, a base station and / or a terminal can support a carrier aggregation operation (e.g., a carrier aggregation function). In a communication network supporting a carrier aggregation operation, a wake-up instruction operation of a terminal using a low-power wake-up signal can be supported. In the communication network, a main radio (e.g., a main radio of a terminal) can perform carrier aggregation for carrier #N to carrier #M. Each of N and M can be a natural number. A low-power wake-up receiver (e.g., a low-power wake-up receiver of a terminal) can monitor a low-power wake-up signal on carrier #N. The low-power wake-up receiver can receive a low-power wake-up signal (e.g., a wake-up instruction) on carrier #N. When a low-power wake-up signal is received, the terminal can wake up the main radio for the aggregated carriers (e.g., carrier #N to carrier #M). When a low-power wake-up signal is received (e.g., a wake-up instruction is received), the terminal may perform a wake-up operation for all aggregated carriers of the main radio. The wake-up operation for all aggregated carriers may mean a paging monitoring operation or a PDCCH monitoring operation on all aggregated carriers.

[0174] In a communication network, a base station may request a response from a terminal regarding information regarding support for a low-power wake-up signal of the terminal. The base station may request a response from the terminal regarding information regarding support for a function of a low-power wake-up receiver of the terminal. In a communication network, a terminal may transmit information regarding support for a low-power wake-up signal to the base station. The information regarding support for a low-power wake-up signal may be transmitted at the request of the base station. The terminal may transmit a response to information regarding support for a function of a low-power wake-up receiver to the base station. The information regarding support for a function of a low-power wake-up receiver may be transmitted at the request of the base station. Transmission of the request of the base station and / or the response of the terminal may be performed via a higher layer message (e.g., RRC configuration).

[0175] A base station can indicate to a terminal whether a low-power wake-up signal is supported. The base station can indicate to the terminal whether a low-power wake-up signal is transmitted. The base station can transmit to the terminal system information (e.g., SIB) including information indicating whether a low-power wake-up signal is supported and / or information indicating whether a low-power wake-up signal is transmitted. Alternatively, the base station can transmit to the terminal an RRC message (e.g., RRC configuration) including information indicating whether a low-power wake-up signal is supported and / or information indicating whether a low-power wake-up signal is transmitted. The terminal can receive, through signaling from the base station, information indicating whether a low-power wake-up signal is supported and / or information indicating whether a low-power wake-up signal is transmitted.

[0176] A base station can indicate to a terminal whether it supports low-power wake-up signals by indicating to the terminal information related to monitoring of low-power wake-up signals. When information related to monitoring of low-power wake-up signals is received from the base station, the terminal can interpret that the base station supports low-power wake-up signals (e.g., transmission of low-power wake-up signals). The base station can indicate the above-described information on a cell-by-cell basis. The base station can transmit system information (e.g., SIB) or an RRC message (e.g., RRC configuration) containing the above-described information to the terminal.

[0177] The terminal may receive information related to monitoring a low-power wake-up signal from the base station and perform monitoring of the low-power wake-up signal based on the information. The terminal may not receive information related to monitoring a low-power wake-up signal from the base station. In this case, the terminal may not perform monitoring of the low-power wake-up signal.

[0178] FIG. 15 is a flowchart illustrating embodiments of a method for setting up monitoring of a low-power wake-up signal in a communication network.

[0179] Referring to FIG. 15, a base station may request information related to support of a low-power wake-up signal of a terminal from a terminal (S1501). The terminal may receive a request for information related to support of a low-power wake-up signal from the base station. The terminal may transmit a response regarding the information related to support of the low-power wake-up signal of the terminal to the base station (S1502). The response may include information related to support of the low-power wake-up signal. The base station may receive information related to support of the low-power wake-up signal from the terminal. The base station may configure monitoring of the low-power wake-up signal of the terminal based on the information related to support of the low-power wake-up signal. The base station may transmit the monitoring settings of the low-power wake-up signal to the terminal (S1503). The terminal may receive the monitoring settings of the low-power wake-up signal from the base station. The terminal may perform monitoring of the low-power wake-up signal based on the monitoring settings of the low-power wake-up signal (S1504).

[0180] The operation of a terminal upon detection of a low-power wake-up signal will be described. A low-power wake-up receiver of the terminal can detect the low-power wake-up signal. The low-power wake-up receiver of the terminal can detect the low-power wake-up signal and determine whether the detected low-power wake-up signal includes a wake-up instruction for the terminal. If the low-power wake-up signal includes the wake-up instruction for the terminal, the low-power wake-up receiver of the terminal can transmit the wake-up instruction for the main radio of the terminal to the main radio. The low-power wake-up receiver can operate in a sleep mode after transmitting the wake-up instruction to the main radio. The low-power wake-up receiver can stop monitoring the low-power wake-up signal after transmitting the wake-up instruction to the main radio. Alternatively, if the detected low-power wake-up signal includes a wake-up instruction for the terminal, the low-power wake-up receiver can stop monitoring the low-power wake-up signal. A low-power wake-up receiver may stop monitoring low-power wake-up signals in sleep mode.

[0181] When a terminal receives a low-power wake-up signal, it can perform paging monitoring or PDDCH monitoring. At this time, the terminal can perform monitoring at a PO determined based on the reception location of the low-power wake-up signal (e.g., the LO or MO where the low-power wake-up signal is detected). If a paging signal is detected at the PO, the terminal can stop monitoring the low-power wake-up signal. The terminal can perform physical random access channel (PRACH) transmissions, etc. using the main radio.

[0182] "If the terminal detects a low-power wake-up signal, performs paging monitoring based on the detected low-power wake-up signal, detects the paging signal, and performs uplink transmission based on the detected paging signal," the terminal may stop monitoring the low-power wake-up signal. The uplink transmission may include a PRACH transmission.

[0183] If the terminal does not detect a paging signal in the PO, the terminal may monitor a low-power wake-up signal. The terminal may monitor a low-power wake-up signal in the LO of the next cycle.

[0184] For another example, if the terminal does not detect a paging signal in the PO, the terminal may perform paging monitoring. The terminal may perform paging monitoring in the PO of the next cycle. The terminal may stop monitoring the low-power wake-up signal. If the terminal does not detect a paging signal for a certain period of time, a certain number of PO cycles, or a certain number of DRX cycles, the terminal may perform monitoring the low-power wake-up signal.

[0185] For another example, if a terminal performs paging monitoring or PDCCH monitoring after detecting a low-power wake-up signal, the terminal may stop monitoring the low-power wake-up signal regardless of whether a paging signal is detected.

[0186] If the low-power wake-up signal does not include a wake-up instruction for the terminal, the low-power wake-up receiver of the terminal may continue to monitor the low-power wake-up signal. If detection of the low-power wake-up signal fails or the low-power wake-up signal is not received, the low-power wake-up receiver of the terminal may continue to monitor the low-power wake-up signal. The low-power wake-up receiver may monitor the low-power wake-up signal according to a monitoring setting (e.g., a monitoring setting indicated by the base station).

[0187] While the low-power wake-up receiver of the terminal monitors the low-power wake-up signal, the main radio of the terminal may not perform paging monitoring or PDCCH monitoring.

[0188] A terminal may transmit information about the wakeup delay time of the terminal to a base station. The base station may receive information about the wakeup delay time from the terminal. The information about the wakeup delay time may be included in UE capability information that the terminal transmits to the base station. The wakeup delay time may be set in milliseconds. The terminal may transmit an index corresponding to the wakeup delay time to the base station. The base station may receive the index from the terminal and determine the wakeup delay time of the terminal based on the index.

[0189] A base station can transmit a time offset value to a terminal via signaling. The base station can transmit the time offset value to the terminal using system information (e.g., SIB). The time offset value can be set in milliseconds. Alternatively, the time offset value can be set in a time unit used in a communication system. For example, the time offset value can be indicated in units of frames, subframes, slots, or symbols. The time offset value can be referred to as a time offset or offset.

[0190] The base station may transmit one or more time offset values ​​to the terminal. The time offset value may refer to a time offset value between the LO or MO where monitoring of the low-power wake-up signal is performed and the PO where paging monitoring is performed. When the terminal detects a low-power wake-up signal in the LO or MO, the terminal may perform paging monitoring in the PO. The PO where paging monitoring is performed may be a PO (e.g., the earliest PO) after the time offset value from the LO (or MO) where the low-power wake-up signal is detected.

[0191] "If a time interval (hereinafter referred to as "first time interval") between the end time of the last LO or last MO for which monitoring of a low-power wake-up signal was performed and the start time of the PO for which paging monitoring is started is longer than a wake-up delay time, and the low-power wake-up signal includes a wake-up instruction of the terminal," the terminal may perform paging monitoring at a PO determined based on a time offset value. The last LO (or last MO) may mean an LO for which a low-power wake-up signal was detected.

[0192] If the first time interval is shorter than the wake-up delay time, the terminal may not perform paging monitoring at the PO indicated by the time offset value. The terminal may stop monitoring the low-power wake-up signal. The terminal may perform a previously defined paging monitoring operation (e.g., a legacy paging monitoring operation). If the low-power wake-up signal does not include a wake-up instruction of the terminal, the terminal may not perform paging monitoring at the PO indicated by the time offset value.

[0193] For another example, if the first time interval is shorter than the wake-up delay time, the terminal may perform paging monitoring at the first PO (e.g., the earliest PO) after the wake-up delay time after receiving a low-power wake-up signal including a wake-up instruction of the terminal.

[0194] A base station can transmit one or more time offset values ​​to a terminal. The time offset value may refer to a time offset value between an LO (or MO) on which monitoring of a low-power wake-up signal is performed and a PO on which paging monitoring is performed. The terminal can detect a low-power wake-up signal in the LO or MO and perform paging monitoring in the PO. "If a time interval (e.g., a first time interval) between the end time of the last LO (or last MO) on which monitoring of a low-power wake-up signal is performed and the start time of the PO on which paging monitoring starts is longer than a wake-up delay time, and the low-power wake-up signal includes a wake-up instruction of the terminal," the terminal can perform paging monitoring in a PO determined based on one of the one or more time offset values. One time offset for determining the PO may be a minimum time offset indicating a first time interval that is longer than the wake-up delay time among the one or more time offsets.

[0195] For example, the terminal may perform paging monitoring at a PO indicated by a largest time offset value among the time offset value(s) indicating a first time interval longer than the wake-up delay time. For another example, the terminal may perform paging monitoring at a PO indicated by a smallest time offset value among the time offset value(s) indicating a first time interval longer than the wake-up delay time. For another example, if all the first time intervals for one or more time offset values ​​are shorter than the wake-up delay time, the terminal may not perform paging monitoring at the PO(s) indicated by the time offset values. The terminal may stop monitoring the low-power wake-up signal. The terminal may perform a previously defined paging monitoring operation. If the low-power wake-up signal does not include a wake-up instruction of the terminal, the terminal may not perform paging monitoring at the PO indicated by the time offset values.

[0196] The start condition(s) for monitoring a low-power wake-up signal will be described. A terminal (e.g., a low-power wake-up receiver of the terminal) can perform monitoring of a low-power wake-up signal while the main radio of the terminal operates in a sleep mode. When the main radio of the terminal does not perform signal monitoring (e.g., signal reception) or signal transmission, the terminal (e.g., a low-power wake-up receiver of the terminal) can perform monitoring of a low-power wake-up signal. The terminal (e.g., a low-power wake-up receiver of the terminal) can perform monitoring of a low-power wake-up signal after the end of "drx-onDurationTimer" based on the DRX configuration of the main radio. The terminal can perform monitoring of a low-power wake-up signal after the end of "drx-Inactivity Timer" based on the DRX configuration of the main radio.

[0197] The signal monitoring operation of the terminal according to the received signal quality of the terminal will be described. The terminal can determine whether to perform a monitoring operation of a low-power wake-up signal based on the received signal quality. The terminal can measure the received signal quality of a serving cell. The terminal can determine whether to perform a monitoring operation of a low-power wake-up signal based on the measurement result of the received signal quality of the serving cell. The measurement of the received signal quality of the serving cell to determine whether to perform a monitoring operation of the low-power wake-up signal of the terminal can be performed via the main radio. The terminal can determine whether to perform a monitoring operation of the low-power wake-up signal based on the measurement result of the received signal quality via the main radio (e.g., reference signal received power (RSRP), reference signal received quality (RSRQ), reference signal strength indicator (RSSI), etc.).

[0198] For another example, the measurement of the reception signal quality of the serving cell to determine whether to perform a monitoring operation of the low-power wake-up signal of the terminal may be performed through a low-power wake-up receiver. The terminal may determine whether to perform a monitoring operation of the low-power wake-up signal based on the measurement result of the reception signal quality (e.g., RSRP, RSRQ, RSSI, etc.) through the low-power wake-up receiver. For another example, the measurement of the reception signal quality of the serving cell to determine whether to perform a monitoring operation of the low-power wake-up signal of the terminal may be performed through the main radio and the low-power wake-up receiver. The terminal may determine whether to perform a monitoring operation of the low-power wake-up signal based on the measurement result of the reception signal quality through the main radio (e.g., RSRP, RSRQ, RSSI, etc.) and the measurement result of the reception signal quality through the low-power wake-up receiver (e.g., RSRP, RSRQ, RSSI, etc.).

[0199] If the measurement result of the received signal quality for the serving cell is better than the threshold, the terminal may start monitoring the low-power wake-up signal. If the measurement result of the received signal quality for the serving cell is worse than the threshold, the terminal may not perform monitoring of the low-power wake-up signal. If the measurement result of the received signal quality for the serving cell is worse than the threshold, the terminal may perform paging monitoring or PDCCH monitoring. The base station may transmit the threshold to the terminal through signaling (e.g., system information, SIB, upper layer message, RRC configuration). The terminal may check the threshold through signaling from the base station. If the base station does not indicate the threshold to the terminal, the terminal may use a predefined threshold.

[0200] The monitoring operation performed at the terminal may be switched based on the measurement results of the received signal quality for the serving cell. For example, the monitoring operation performed at the terminal may be switched from a low-power wake-up signal monitoring operation to a paging monitoring operation (e.g., a PDCCH monitoring operation). In another example, the monitoring operation performed at the terminal may be switched from a paging monitoring operation (e.g., a PDCCH monitoring operation) to a low-power wake-up signal monitoring operation.

[0201] The above thresholds may be indicated (e.g., set) to the terminal as one or more values. A threshold for comparison with the measurement results via the main radio (e.g., a main threshold) and a threshold for comparison with the measurement results via the low-power wake-up receiver (e.g., a low-power threshold) may be indicated (e.g., set) to the terminal. "If one or more thresholds are indicated to the terminal, and each measurement result is better than each threshold," the terminal may perform monitoring of the low-power wake-up signal. "If multiple thresholds are indicated to the terminal, and some measurement results are better than some thresholds (e.g., at least one measurement result is worse than at least one threshold)," the terminal may not perform monitoring of the low-power wake-up signal.

[0202] If the measurement result through the main radio is better than the main threshold and the measurement result through the low-power wake-up receiver is better than the low-power threshold, the terminal can perform monitoring of the low-power wake-up signal.

[0203] The terminal may measure the reception signal quality for the serving cell while monitoring a low-power wake-up signal. "While the terminal monitors a low-power wake-up signal" may mean "the terminal is configured to monitor a low-power wake-up signal, and the terminal monitors the low-power wake-up signal." "While the terminal monitors a low-power wake-up signal" may not mean "the moment when the terminal monitors the low-power wake-up signal."

[0204] While the terminal monitors the low-power wake-up signal, the measurement of the reception signal quality for the serving cell can be performed using the low-power wake-up receiver of the terminal. The terminal can measure the reception signal quality for the serving cell based on the low-power wake-up signal or the low-power synchronization signal received by the low-power wake-up receiver. The terminal can determine whether to continue or stop the monitoring operation of the low-power wake-up signal based on the measurement result of the reception signal quality of the serving cell through the low-power wake-up receiver.

[0205] If the measurement result of the received signal quality is better than the threshold (e.g., the measurement result is higher than the threshold or the measurement result is lower than the threshold), the terminal may continue to monitor the low-power wake-up signal. The base station may transmit the threshold to the terminal through signaling (e.g., system information, SIB, upper layer message, RRC configuration). The terminal may check the threshold through the signaling from the base station. If the base station does not indicate the threshold to the terminal, the terminal may use a predefined threshold.

[0206] If the measurement result of the received signal quality is worse than a threshold (e.g., lower than the threshold or higher than the threshold), the terminal may stop monitoring the low-power wake-up signal. If the terminal stops monitoring the low-power wake-up signal, the terminal may perform signal monitoring via the main radio.

[0207] Different thresholds may be set depending on the type of low-power wake-up receiver of the terminal. For example, the threshold when the terminal supports an OFDM-based low-power wake-up receiver may be set differently from the threshold when the terminal supports an OOK (On-Off Keying)-based low-power wake-up receiver. An OFDM-based low-power wake-up receiver can receive an OFDM signal. An OOK-based low-power wake-up receiver can receive an OOK signal. The terminal can transmit UE capability information (e.g., a UE capability report) including low-power wake-up receiver-related information (e.g., the type of low-power wake-up receiver) to the base station. The base station can receive the UE capability information from the terminal and check the low-power wake-up receiver-related information (e.g., the type of low-power wake-up receiver) included in the UE capability information. The base station can determine a threshold based on the low-power wake-up receiver-related information (e.g., the type of low-power wake-up receiver) and transmit the determined threshold to the terminal. For another example, a base station may transmit one or more thresholds for a low-power wake-up receiver to a terminal, and the terminal may determine one of the thresholds received from the base station based on the type of the terminal's low-power wake-up receiver. The terminal may use the determined one threshold.

[0208] A terminal that has stopped monitoring a low-power wake-up signal may perform paging monitoring or PDCCH monitoring. Paging monitoring or PDCCH monitoring may be performed via the main radio. If the terminal is configured for Paging Early Indication (PEI) monitoring, the terminal may perform PEI monitoring. PEI monitoring may be performed via the main radio. Cessation of monitoring a low-power wake-up signal may indicate the start of paging monitoring, PDCCH monitoring, or PEI monitoring. In the present disclosure, paging monitoring may be interpreted to include PEI monitoring.

[0209] The terminal may periodically measure the quality of the received signal while monitoring the low-power wake-up signal. Based on the results of the periodic measurement of the quality of the received signal, the terminal may determine whether to continue or discontinue the monitoring operation of the low-power wake-up signal.

[0210] Figure 16 is a flowchart illustrating embodiments of a monitoring method in a communication network.

[0211] Referring to FIG. 16, a terminal may perform radio resource management (RRM) using a main radio (S1601). RRM may refer to a measurement operation (e.g., a measurement operation for a serving cell and / or an adjacent cell). The terminal may compare an RRM result (e.g., an RRM measurement result) with a threshold (S1602). If the RRM result exceeds (or is greater than) the threshold, the terminal may perform monitoring of a low-power wake-up signal (S1603). If monitoring of a low-power wake-up signal is performed, the terminal may stop PO monitoring (S1604). If the RRM result is less than (or less than) the threshold, the terminal may perform PO monitoring (S1605).

[0212] The terminal may determine whether to continue or stop monitoring of a low-power wake-up signal based on one or more comparison results between periodic measurement result(s) of received signal quality and a threshold. If the comparison result between the measurement result(s) of received signal quality and the threshold results in the discontinuation of monitoring of the low-power wake-up signal at least once, the terminal may stop monitoring of the low-power wake-up signal. If the comparison result between the measurement result(s) of received signal quality and the threshold results in the discontinuation of monitoring of the low-power wake-up signal X or more consecutive times, the terminal may stop monitoring of the low-power wake-up signal. X may be a natural number. If the comparison operation between the measurement result(s) of received signal quality and the threshold is performed Y times, and the results of Z or more of the Y comparison operations result in the discontinuation of monitoring of the low-power wake-up signal, the terminal may stop monitoring of the low-power wake-up signal. Each of Y and Z may be a natural number. The values ​​of each of X, Y, and Z may be predefined according to system settings (e.g., settings of a communication system). Alternatively, the base station can signal the values ​​of X, Y, and Z to the terminal. The terminal can check the values ​​of X, Y, and Z through the signaling of the base station.

[0213] The terminal may measure the received signal quality for the serving cell while performing paging monitoring or PEI monitoring. "While the terminal performs paging monitoring or PEI monitoring" may mean "the terminal is configured to perform paging monitoring or PEI monitoring, and the terminal performs paging monitoring or PEI monitoring." "While the terminal performs paging monitoring or PEI monitoring" may not mean "the moment the terminal performs paging monitoring or PEI monitoring."

[0214] If the measurement result of the received signal quality is worse than the threshold (e.g., the measurement result is lower than the threshold or higher than the threshold), the terminal may continue to perform paging monitoring or PEI monitoring. The base station may transmit the threshold to the terminal through signaling (e.g., system information, SIB, upper layer message, RRC configuration). The terminal may check the threshold through the signaling from the base station. If the base station does not indicate the threshold to the terminal, the terminal may use a predefined threshold.

[0215] If the measurement result of the received signal quality is better than a threshold (e.g., if the measurement result is higher than the threshold or if the measurement result is lower than the threshold), the terminal may stop paging monitoring or PEI monitoring. If the terminal stops paging monitoring or PEI monitoring, the terminal may perform signal monitoring using a low-power wake-up receiver. The terminal that has stopped paging monitoring or PEI monitoring may perform monitoring of a low-power wake-up signal. Monitoring of the low-power wake-up signal may be performed through the low-power wake-up receiver of the terminal. Stopping PO monitoring or PEI monitoring may mean the start of monitoring of the low-power wake-up signal.

[0216] The terminal may periodically measure the quality of the received signal while performing PO monitoring or PEI monitoring. Based on the results of the periodic measurement of the quality of the received signal, the terminal may decide whether to continue or discontinue the PO monitoring operation or PEI monitoring operation.

[0217] Figure 17 is a flowchart illustrating embodiments of a monitoring method in a communication network.

[0218] Referring to FIG. 17, a terminal may perform RRM using a low-power wake-up receiver (S1701). RRM may refer to a measurement operation (e.g., a measurement operation for a serving cell and / or an adjacent cell). The terminal may compare the RRM result (e.g., an RRM measurement result) with a threshold (S1702). If the RRM result is less than (or below) the threshold, the terminal may perform paging monitoring (S1703). If paging monitoring is performed, the terminal may stop monitoring a low-power wake-up signal (S1704). If the RRM result is equal to or greater than (or exceeds) the threshold, the terminal may perform monitoring of a low-power wake-up signal (S1705).

[0219] The terminal may determine whether to continue or stop the paging monitoring operation or the PEI monitoring operation based on one or more comparison results between the periodic measurement result(s) of the received signal quality and the threshold. If the comparison result between the measurement result(s) of the received signal quality and the threshold results in the stop of the paging monitoring operation or the PEI monitoring operation at least once, the terminal may stop the paging monitoring operation or the PEI monitoring operation. If the comparison result between the measurement result(s) of the received signal quality and the threshold results in the stop of the paging monitoring operation or the PEI monitoring operation X or more consecutive times, the terminal may stop the paging monitoring operation or the PEI monitoring operation. X may be a natural number. If the comparison operation between the measurement result(s) of the received signal quality and the threshold is performed Y times, and the results of Z or more of the Y comparison operations result in the stop of the paging monitoring operation or the PEI monitoring operation, the terminal may stop the paging monitoring operation or the PEI monitoring operation. Each of Y and Z may be a natural number. The values ​​of each of X, Y, and Z may be predefined according to system settings (e.g., settings of a communication system). Alternatively, the base station can signal the values ​​of X, Y, and Z to the terminal. The terminal can check the values ​​of X, Y, and Z through the signaling of the base station.

[0220] The main radio can receive a wake-up instruction from a low-power wake-up receiver. When the wake-up instruction is received, the main radio can monitor for a paging signal transmitted from the base station. When the wake-up instruction is received, the operating mode of the main radio can transition from sleep mode to wake-up mode. After receiving the low-power wake-up signal, the terminal can detect a paging signal in a paging occasion. After receiving the low-power wake-up signal, the terminal can perform a procedure for an RRC connection. For example, the terminal can transmit a random access channel (RACH) preamble after detecting a paging signal. In another example, the terminal can transmit a RACH preamble after receiving the low-power wake-up signal.

[0221] The payload length of a low-power wake-up signal may vary depending on system settings (e.g., communication system settings). The base station can transmit information about the payload length of the low-power wake-up signal to the terminal through signaling (e.g., system information, SIB, RRC message, RRC settings). The terminal can receive information about the payload length of the low-power wake-up signal from the base station. The terminal can check the payload length indicated by the base station (e.g., the payload length of the low-power wake-up signal). The terminal can check information about the payload length of the low-power wake-up signal by receiving system information (e.g., SIB).

[0222] The reception settings for a low-power wake-up signal and the detection settings for PEI will be described. The terminal can perform one of the operations of receiving the low-power wake-up signal or detecting the PEI. If the base station transmits the reception settings for the low-power wake-up signal and the detection settings for PEI to the terminal (for example, if the base station configures the reception of the low-power wake-up signal and the detection of PEI in the terminal), the terminal can perform an operation according to one of the settings. If the reception settings for the low-power wake-up signal and the detection settings for PEI are received, the terminal can only perform the reception operation for the low-power wake-up signal. In this case, the terminal may not perform the detection operation for PEI. As another example, if the reception settings for the low-power wake-up signal and the detection settings for PEI are received, the terminal can perform the reception operation for the low-power wake-up signal and the detection operation for PEI, respectively. If the terminal detects either the low-power wake-up signal or PEI, the terminal may not perform detection for the other. In this case, the terminal may perform detection of the paging signal. Alternatively, the terminal may wait until the next signal monitoring cycle.

[0223] A base station can transmit information about the transmission power of a low-power wake-up signal to a terminal via signaling (e.g., system information, SIB). The transmission power of the low-power wake-up signal can be indicated as an offset with respect to the transmission power of an SSB. The transmission power of the low-power wake-up signal can be indicated in the form of an average Energy Per Resource Element (EPRE). The transmission power of the low-power wake-up signal can be defined as the average EPRE. The transmission power of the low-power wake-up signal can be indicated as an offset with respect to the average EPRE of the SSB. The terminal can use the above information (e.g., the offset) to determine the transmission power of the low-power wake-up signal.

[0224] The methods according to the present disclosure may be implemented in the form of program instructions that can be executed by various computer means and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc., either singly or in combination. The program instructions recorded on the computer-readable medium may be those specifically designed and configured for the present disclosure or may be known and available to those skilled in the computer software art.

[0225] Examples of computer-readable media include hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, and flash memory. Examples of program instructions include not only machine language codes generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter, etc. The hardware devices described above may be configured to operate with at least one software module to perform the operations of the present disclosure, and vice versa.

[0226] Although the present disclosure has been described with reference to the above embodiments, it will be understood by those skilled in the art that various modifications and changes can be made to the present disclosure without departing from the spirit and scope of the present disclosure as set forth in the claims below.

Claims

1. As a terminal method, receiving one or more time offsets from a base station; and A step of performing monitoring for a low-power wakeup signal at a LO (Low-power wakeup signal Occasion) indicated by at least one time offset of the one or more time offsets, when one time offset of the one or more time offsets is greater than or equal to a wakeup delay time of the terminal, Terminal method.

2. In claim 1, The wake-up delay time is one of one or more candidate times from the time the terminal receives the low-power wake-up signal to the time the terminal performs PDCCH (physical downlink control channel) monitoring. Terminal method.

3. In claim 1, Further comprising a step of transmitting information on the wake-up delay time to the base station, Information about the wake-up delay time is included in a UE (user equipment) capability report transmitted from the terminal to the base station, and the one or more time offsets are determined based on the wake-up delay time. Terminal method.

4. In claim 1, Further comprising a step of performing monitoring for a paging signal in a PO (paging occasion) associated with the LO when the low-power wake-up signal of the terminal is detected in the LO. Terminal method.

5. In claim 1, Further comprising the step of performing monitoring for a paging signal in the PO without monitoring for the LO, if the one or more time offsets are less than the wakeup delay time. Terminal method.

6. In claim 1, wherein said one time offset is equal to said at least one time offset, Terminal method.

7. In claim 1, wherein said one time offset is a largest time offset among said one or more time offsets, and said at least one time offset is a minimum time offset indicating an interval between said LO and PO that is greater than or equal to said wakeup delay time among said one or more time offsets. Terminal method.

8. In claim 1, The terminal includes a low-power receiver and a main radio, and monitoring in the LO is performed by the low-power receiver, and monitoring in the PO is performed by the main radio. Terminal method.

9. In claim 8, Further comprising the step of performing a measurement operation using the above main radio, If the result of the above measurement operation exceeds the threshold, monitoring for the low-power wake-up signal is performed in the LO, and if the result of the above measurement operation is below the threshold, monitoring for the paging signal is performed in the PO without monitoring in the LO. Terminal method.

10. In claim 8, Further comprising the step of performing a measurement operation using the low power receiver, If the result of the above measurement operation is greater than or equal to the threshold, monitoring for the low-power wake-up signal is performed in the LO, and if the result of the above measurement operation is less than the threshold, monitoring for the paging signal is performed in the PO without monitoring in the LO. Terminal method.

11. As a terminal, Contains at least one processor, At least one processor of the terminal, Receive one or more time offsets from a base station; and If one of the one or more time offsets is greater than or equal to the wake-up delay time of the terminal, causing monitoring for a low-power wake-up signal at a LO (Low-power wake-up signal Occasion) indicated by at least one of the one or more time offsets, Terminal.

12. In claim 11, The wake-up delay time is one of one or more candidate times from the time the terminal receives the low-power wake-up signal to the time the terminal performs PDCCH (physical downlink control channel) monitoring. Terminal.

13. In claim 11, At least one processor of the terminal, Further causing the information of the wake-up delay time to be transmitted to the base station, Information about the wake-up delay time is included in a UE (user equipment) capability report transmitted from the terminal to the base station, and the one or more time offsets are determined based on the wake-up delay time. Terminal.

14. In claim 11, At least one processor of the terminal, If the low-power wake-up signal of the terminal is detected in the LO, further causing monitoring for a paging signal to be performed in a PO (paging occasion) associated with the LO. Terminal.

15. In claim 11, At least one processor of the terminal, If the one or more time offsets are less than the wakeup delay time, further causing the PO to perform monitoring for the paging signal without monitoring the LO. Terminal.

16. In claim 11, wherein said one time offset is equal to said at least one time offset, Terminal.

17. In claim 11, wherein said one time offset is a largest time offset among said one or more time offsets, and said at least one time offset is a minimum time offset indicating an interval between said LO and PO that is greater than or equal to said wakeup delay time among said one or more time offsets. Terminal.

18. In claim 11, The terminal further includes a low power receiver and a main radio, and monitoring in the LO is performed by the low power receiver, and monitoring in the PO is performed by the main radio. Terminal.

19. In claim 18, At least one processor of the terminal, Further causing the measurement operation to be performed using the above main radio, If the result of the above measurement operation exceeds the threshold, monitoring for the low-power wake-up signal is performed in the LO, and if the result of the above measurement operation is below the threshold, monitoring for the paging signal is performed in the PO without monitoring in the LO. Terminal.

20. In claim 18, At least one processor of the terminal, Further causing the measurement operation to be performed using the above low power receiver, If the result of the above measurement operation is greater than or equal to the threshold, monitoring for the low-power wake-up signal is performed in the LO, and if the result of the above measurement operation is less than the threshold, monitoring for the paging signal is performed in the PO without monitoring in the LO. Terminal.

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