Terminal and communication method

Abstract

To clarify the operation in a terminal in which both LP-WUS and cell DTX / DRX are configured, and appropriately perform LP-WUS monitoring and cell DTX / DRX operations.SOLUTION: A terminal includes a receiving unit that receives a low power wake-up signal from a base station in a first cell, and a control unit that sets information related to the low power wake-up signal in the terminal, and the control unit sets or does not set cell DTX (Discontinuous Transmission) / DRX (Discontinuous Reception) in the terminal for each of one or more cells including the first cell or for the first cell.SELECTED DRAWING: Figure 4

Description

[Technical Field]

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

[0002] 3GPP (registered trademark) (3rd Generation Partnership Project) is studying technologies for achieving further increases in system capacity, further increases in data transmission speed, and further reductions in latency in wireless sections (for example, Non-Patent Documents 1 and 2). Furthermore, 3GPP Rel-19 is discussing low-power wake-up signaling (LP (Low Power)-WUS (Wake Up Signal) / LP-WUR (Wake Up Receiver)) technology for reducing power consumption in wireless communication systems.

[0003] One power saving technology is cell DTX (Discontinuous Transmission) / DRX (Discontinuous Reception), which controls intermittent transmission and reception between base stations and terminals. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 38.300 V18.3.0(2024-09) [Non-patent document 2] 3GPP TS 38.401 V18.3.0(2024-09) Summary of the Invention [Problem to be solved by the invention]

[0005] Conventionally, the operation when using LP-WUS and cell DTX / DRX simultaneously has not been clearly defined, and there is a risk that a terminal may not be able to properly perform LP-WUS monitoring and operations based on cell DTX / DRX. [Means for solving the problem]

[0006] In this embodiment, the terminal comprises a receiving unit that receives a low power wake-up signal from a base station in a first cell, and a control unit that sets information regarding the low power wake-up signal in the terminal, and the control unit sets or does not set cell DTX / DRX in the terminal for each of one or more cells including the first cell or for the first cell. [Effects of the Invention]

[0007] According to this embodiment, the operation in a terminal in which both LP-WUS and cell DTX / DRX are set is clarified, and the LP-WUS monitoring and cell DTX / DRX operations can be appropriately performed. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 2] FIG. 1 is a diagram illustrating the operation of a conventional cell DTX / DRX. [Figure 3] FIG. 10 is a diagram illustrating an example of a method for setting cell DTX / DRX in the first embodiment. [Figure 4] FIG. 10 is a diagram illustrating an example of a method for setting cell DTX / DRX in the first embodiment. [Figure 5] FIG. 10 is a diagram illustrating an example of the relationship in the time direction between cell DTX / DRX and LP-WUS monitoring opportunities in the second embodiment. [Figure 6] FIG. 10 is a diagram illustrating an example of the relationship in the time direction between cell DTX / DRX and LP-WUS monitoring opportunities in the second embodiment. [Figure 7] FIG. 10 is a diagram illustrating an example of a method for monitoring a PDCCH according to a third embodiment. [Figure 8] FIG. 10 is a diagram illustrating an example of a method for monitoring a PDCCH according to a third embodiment. [Figure 9]FIG. 2 is a diagram illustrating an example of a functional configuration of a base station according to the present embodiment. [Figure 10] FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal according to the present embodiment. [Figure 11] FIG. 2 is a diagram illustrating an example of a hardware configuration of a base station or a terminal according to the present embodiment. [Figure 12] 1 is a diagram illustrating an example of a configuration of a vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] The present embodiment will be described below with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0010] The wireless communication system of this embodiment operates using existing technology. The existing technology is, for example, a wireless communication technology based on a communication standard such as the 3GPP standard. The existing technology is, for example, NR (New Radio), but is not limited to existing NR. Unless otherwise specified, the term "NR" used in this specification has a broad meaning including NR (5G) and subsequent systems (for example, 6G).

[0011] In the present embodiment described below, terms used in existing communication standards, such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel), are used. This is for convenience of description, and similar signals, functions, etc. may be called by other names.

[0012] In this embodiment, the duplex method may be a time division duplex (TDD) method, a frequency division duplex (FDD) method, or other methods (for example, flexible duplex, etc.).

[0013] In this embodiment, when radio parameters etc. are "configured," it may mean that a predetermined value is pre-configured, or that radio parameters notified from the base station 10 or the terminal 20 are set.

[0014] Fig. 1 is a diagram showing an example of the configuration of a wireless communication system in this embodiment. As shown in Fig. 1, the wireless communication system in this embodiment includes a base station 10 and a terminal 20. Although Fig. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each.

[0015] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a wireless signal are defined in the time domain and the frequency domain. The time domain may be defined by the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signal is, for example, a PSS and an SSS. The system information is, for example, transmitted via a PBCH and is also referred to as broadcast information. The synchronization signal and system information may be referred to as an SSB (SS / PBCH block). As shown in FIG. 1 , the base station 10 transmits control signals or data to the terminal 20 in a downlink (DL) and receives control signals or data from the terminal 20 in an uplink (UL). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming. Furthermore, both the base station 10 and the terminal 20 are capable of applying MIMO (Multiple Input Multiple Output) communication to the DL or UL. In addition, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) using CA (Carrier Aggregation). Furthermore, the terminal 20 may communicate via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using DC (Dual Connectivity).

[0016] The terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or an M2M (Machine-to-Machine) communication module. As shown in Fig. 1, the terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 also receives various reference signals transmitted from the base station 10 and measures the propagation path quality based on the reception results of the reference signals.

[0017] The terminal 20 in this embodiment may perform communication using one serving cell, or may perform communication using multiple serving cells (for example, CA or DC).

[0018] In the following description, unless otherwise specified or unless a different meaning is clear from the context, " / " means "and / or."

[0019] 3GPP is currently discussing a power consumption reduction technology called "Low-Power Wake Up Signal and Receiver." The Low-Power Wake Up Signal is called LP-WUS or WUS, and the Low-Power Wake Up Receiver is called LP-WUR, WUR, or LR. The LR, a simplified circuit that operates with lower power consumption than the Main Radio (MR), replaces the MR, a circuit used for normal data communications, and introduces a state called Ultra-Deep Sleep. The LR may have a function that triggers the MR to be powered off or powered on when it receives an LP-WUS signal.

[0020] The agreement on the scope of application of LP-WUS / WUR in 3GPP Rel-19 is shown below.

[0021] To specify a LP-WUS design that is commonly applicable to both RRC IDLE / INACTIVE and RRC CONNECTED modes, an OFDM sequence overlaid on OOK symbols (OOK-1 and / or OOK-4) based LP-WUS is specified, supporting at least LP-WUS duty cycle monitoring. The LP-WUS design must ensure that the same information is delivered in IDLE / INACTIVE operation regardless of the LP-WUS type. The OFDM sequence may carry information.

[0022] In RRC IDLE / INACTIVE mode, - Specifying the procedures and configurations for LP-WUS to indicate paging monitoring triggered by LP-WUS, including at least the configuration, subgrouping and entry / exit conditions for LP-WUS monitoring.

[0023] - For synchronization and / or serving cell RRM, the LP-WUR is assigned an LP-SS with a periodicity of Y [ms]. The LP-SS is based on OOK-1 and / or OOK-4 waveforms, with or without an OFDM sequence overlay. For LP-WURs that can receive existing PSS / SSS, the existing PSS / SSS can be used instead of the LP-SS for synchronization and RRM.

[0024] -Specify further relaxation of RRM of the terminal 20 MR with measurements of both the serving cell and the neighbor cell and offloading of RRM measurements of the terminal 20 serving cell from the MR to the LP-WUR, including the necessary conditions.

[0025] In RRC CONNECTED mode, it specifies the procedure to enable UE MR PDCCH monitoring triggered by LP-WUS, including the procedure to enable and disable LP-WUS monitoring. In CONNECTED mode, UE MR ultra-deep sleep is not considered, and UE RRM / RLM / BFD / CSI measurements are performed by MR.

[0026] The target coverage for LP-WUS and LP-SS is the PUSCH coverage of message 3. Optimization of the LP-WUS signal design for idle / inactive mode takes priority over optimization for connected mode.

[0027] Figure 2 illustrates the operation of cell DTX / DRX in 3GPP Rel-18. In Rel-18 cell DTX / DRX, each serving cell can be configured with a periodic cell DTX pattern (active period and inactive period) by RRC. The cell DTX / DRX pattern configuration is common to all UEs configured with this feature within the cell. Up to two cell DTX / DRX patterns can be configured for different serving cells per MAC entity (cell group). The start and slot offset of the two patterns are common. The period of one is an integer multiple of the period of the other. The cell DTX / DRX feature is only applicable to UEs in the RRC_CONNECTED state and does not affect random access procedures, SSB transmission, paging, or system information broadcast. The cell DTX / DRX active period is the period during which the UE waits to receive a PDCCH or SPS opportunity and transmit an SR or CG. During the active period, the gNB's transmission and reception of PDCCH, SPS, SR, CG, periodic and semi-persistent CSI reports are not affected for the purpose of network energy saving. The cell DTX / DRX cycle refers to the periodic repetition of the active period before the inactive period.

[0028] However, conventionally, the operation when LP-WUS and cell DTX / DRX are used simultaneously has not been clarified, and there is a risk that a terminal may not be able to appropriately perform operations based on LP-WUS monitoring and cell DTX / DRX. For example, it is not clear how cell DTX / DRX should be configured in a terminal in which LP-WUS is configured. Furthermore, the operation when an LP-WUS monitoring occasion (MO) is configured within a cell DTX inactive time has not been specified. Also, it is not clear how a terminal in which both LP-WUS and cell DTX / DRX are configured should perform PDCCH monitoring.

[0029] According to this embodiment, the operation in a terminal in which both LP-WUS and cell DTX / DRX are set is clarified, and it is possible to appropriately perform LP-WUS monitoring and cell DTX / DRX operations.

[0030] In this embodiment, cell DTX / DRX indicates at least one of cell DTX and cell DRX.

[0031] In this embodiment, the active time may refer to an active period.

[0032] In this embodiment, the LP-WUS (low power wake-up signal) is an example of a low power signal. For example, a legacy (conventional) NR signal / channel is an example of a signal that does not include a low power signal or a signal that is different from a low power signal.

[0033] The terminal in this embodiment may be a terminal in RRC_CONNECTED mode. However, the terminal in this embodiment is not limited to a terminal in RRC_CONNECTED mode. A terminal in RRC_CONNECTED mode may also be referred to as a terminal in a connected state.

[0034] In the following description, the notation [A / B / C / D] means at least one of A, B, C, or D, and any combination such as A and B or A, B and C is possible.

[0035] The examples in this embodiment may be implemented independently of each other, or any combination of a plurality of examples may be implemented.

[0036] In this embodiment, when "X" (for example, function or information) is configured in a terminal (or a base station), it indicates that the terminal is configured with "X".

[0037] In this embodiment, the various pieces of information set in the terminal may be included in parameters (e.g., upper layer (RRC) parameters) transmitted from the base station. The terminal may set the various pieces of information in the terminal based on the parameters transmitted from the base station. As another example, the various pieces of information may be set in the terminal in advance based on a standard (e.g., technical specifications of the 3GPP standard).

[0038] Example 1 According to the first embodiment, it is made clear how cell DTX / DRX should be configured for a terminal in which LP-WUS is configured.

[0039] (1-1) When both LP-WUS and C-DRX are configured for terminal 20 in RRC_CONNECTED mode, cell DTX / DRX may be configured based on any one or a combination of the following (1-1-1) to (1-1-6).

[0040] (1-1-1) Cell DTX / DRX is set for the terminal 20.

[0041] (1-1-2) Cell DTX / DRX is not set for the terminal 20.

[0042] (1-1-3) Cell DTX / DRX is configured for at least one of any cell of the terminal 20, such as a PCell (Primary Cell), a PSCell (Primary Secondary Cell), a SCell (Secondary Cell), or a SpCell (Special Cell). In this embodiment, one or more cells for which cell DTX / DRX is configured or not configured may be included in the same cell group, may be included in different cell groups, or may be cells for which no cell group is configured.

[0043] In Fig. 3 showing an example of the case (1-1-3), cell DTX / DRX is configured for cells #1-3. When both LP-WUS and C-DRX are configured and terminal 20 camped on cell #1 detects LP-WUS indicating PDCCH monitoring, triggers due to LP-WUS are applied to cells that are not in the inactive time of cell DTX (i.e., cells #1-#3 during the active time of cell DTX). On the other hand, triggers due to LP-WUS are not applied to cells during the inactive time of cell DTX.

[0044] The timer (period) for the terminal to monitor the PDCCH based on a trigger by the LP-WUS in FIG. 3 and FIG. 4 described later may be a C-DRX active time or a PDCCH monitoring opportunity.

[0045] (1-1-4) Cell DTX / DRX is not configured for at least one of any cell of terminal 20, PCell, PSCell, Scell, or SpCell.

[0046] (1-1-5) Cell DTX / DRX is set for the cell from which the terminal 20 receives the LP-WUS.

[0047] (1-1-6) Cell DTX / DRX is not set for the cell from which the terminal 20 receives the LP-WUS.

[0048] 4, which shows an example of the case (1-1-6), cell DTX / DRX is not configured for cell #1, which is the cell from which terminal 20 receives LP-WUS. When terminal 20, in which both LP-WUS and C-DRX are configured and camped on cell #1, detects LP-WUS indicating PDCCH monitoring, triggering by LP-WUS is applied only to cells that are not in the inactive time of cell DTX (i.e., cells #1-#3 during the active time of cell DTX) and cells in which cell DTX is not configured (e.g., cell #1).

[0049] (1-2) In the RRC_CONNECTED mode, when only LP-WUS is configured for the terminal 20 and C-DRX is not configured, the cell DTX / DRX may be configured based on one or a combination of the following:

[0050] (1-2-1) Cell DTX / DRX is set for the terminal 20.

[0051] (1-2-2) Cell DTX / DRX is not set for the terminal 20.

[0052] (1-2-3) Cell DTX / DRX is configured for at least one of the PCell, PSCell, Scell, or SpCell of the terminal 20.

[0053] (1-2-4) Cell DTX / DRX is not configured for at least one of the PCell, PSCell, Scell, or SpCell of the terminal 20.

[0054] (1-2-5) Cell DTX / DRX is set for the cell from which the terminal 20 receives the LP-WUS.

[0055] (1-2-6) Cell DTX / DRX is not set for the cell from which the terminal 20 receives the LP-WUS.

[0056] (1-2-7) Cell DTX / DRX is set for the cell associated with the LP-WUS of the terminal 20.

[0057] (1-2-8) Cell DTX / DRX is set for a cell that is not associated with the LP-WUS of the terminal 20.

[0058] (1-2-9) Cell DTX / DRX is not set for the cell associated with the LP-WUS of the terminal 20.

[0059] (1-2-10) Cell DTX / DRX is not set for cells that are not associated with the LP-WUS of the terminal 20.

[0060] When only the LP-WUS is configured for the terminal 20 and the C-DRX is not configured, the cell and the LP-WUS may be associated in the following cases.

[0061] Case 1: All serving cells in a cell group are associated with the LP-WUS.

[0062] Case 2: All serving cells in a cell group / MAC entity are associated with the LP-WUS.

[0063] Case 3: Depending on the configuration, at least one of one serving cell, some serving cells or all serving cells in a cell group / MAC entity is associated with the LP-WUS.

[0064] If the terminal 20 detects the LP-WUS and the LP-WUS indicates PDCCH monitoring, the terminal 20 needs to perform PDCCH monitoring on the serving cell associated with the LP-WUS.

[0065] As described above, according to the first embodiment, it is possible to clarify how cell DTX / DRX should be configured for a terminal in which an LP-WUS is configured, and the terminal can appropriately perform LP-WUS monitoring and cell DTX / DRX.

[0066] Example 2 According to the second embodiment, the timing between the cell DTX / DRX and the LP-WUS monitoring opportunity (LP-WUS MO) can be adjusted. For example, the terminal 20 may receive information for adjusting the timing between the cell DTX / DRX and the LP-WUS MO from the base station 10 via RRC signaling, and the terminal 20 may adjust the timing between the cell DTX / DRX and the LP-WUS MO based on the received information.

[0067] In this embodiment, the terminal 20 in which the LP-WUS is set may refer to the terminal 20 in which information for LP-WUS monitoring or LP-WUS reception is set.

[0068] Example 2-1 When cell DTX / DRX and LP-WUS are configured for the terminal 20, the LP-WUS MO may be configured independently of the cell DTX / DRX. The LP-WUS monitoring occasion and the cell DRX may be configured without any restrictions in the time direction.

[0069] (Example 2-2) 5, when cell DTX / DRX and LP-WUS are configured for terminal 20, the LP-WUS MO and the cell DTX / DRX active period (active time) may at least partially overlap. For example, the network (base station 10) may configure terminal 10 so that there is at least partial overlap between the LP-WUS MO and the cell DTX / DRX active period. Terminal 10, 20, does not need to assume that cell DTX / DRX and LP-WUS MO will be configured without partial overlap between the LP-WUS MO and the cell DTX / DRX active period.

[0070] (Example 2-3) As shown in Figure 6, when cell DTX / DRX and LP-WUS are configured for terminal 20, the cell DTX / DRX period may be an integer multiple of the LP-WUS monitoring period, or the LP-WUS monitoring period may be an integer multiple of the cell DTX / DRX period.

[0071] For example, the C-DRX operation in the terminal 20 may be configured so that, if the terminal 20 has not received a wake-up instruction, it does not report periodic CSI / L1-RSRP for a time period specified by the set drx-onDurationTimer, or so that it periodically reports periodic CSI / L1-RSRP for a period specified by the set drx-onDurationTimer regardless of whether the terminal 20 has received a wake-up instruction. The drx-onDurationTimer is a parameter that sets the active period of the terminal 20 in C-DRX. When the C-DRX operation is configured in this way, in Examples 2-3, the LP-WUS monitoring period may be set to be equal to the C-DRX period.

[0072] For example, the C-DRX operation in the terminal 20 may be configured not to report periodic CSI / L1-RSRP if the terminal 20 has not received a wake-up instruction, or to periodically report periodic CSI / L1-RSRP regardless of whether the terminal 20 has received a wake-up instruction. When the C-DRX operation is configured in this way, in Example 2-3, the LP-WUS monitoring period may be set to be shorter than the C-DRX period.

[0073] For example, the LP-WUS monitoring period in Example 2-3 may be determined based on at least one of the following parameters (1) to (5).

[0074] 1) A parameter indicating periodicity (e.g., lpwus_periodicity) The parameter indicating periodicity specifies the period for LP-WUS monitoring in [seconds / milliseconds / radio frames / SFN / subframes / slots / symbols].

[0075] 2) Parameter indicating offset 1 (e.g., lpwus_offset1) The parameter indicating offset 1 specifies the timing of LP-WUS monitoring in the cycle as an offset value in units of [radio frame / SFN / subframe / slot].

[0076] 3) Parameter indicating offset 2 (e.g., lpwus_offset2) The parameter indicating offset 2 is an offset value in symbol units from the boundary of the [radio frame / SFN / subframe / slot] or a reference point, and specifies the start timing of LP-WUS monitoring.

[0077] 4) A parameter indicating the duration (e.g., lpwus_duration) The parameter indicating the period specifies the period for LP-WUS monitoring in [seconds / milliseconds / radio frames / SFN / subframes / slots / symbols].

[0078] 5) A parameter indicating the wakeup delay (e.g., lpwus_wakeupdelay) The wake-up delay parameter specifies the [expected / max / min] wake-up delay before starting PDCCH monitoring in [seconds / milliseconds / radio frame / SFN / subframe / slot / symbol]. The wake-up delay may be set to zero.

[0079] In this way, according to the second embodiment, the timing of cell DTX / DRX and LP-WUS MO can be defined.

[0080] Example 3 In the third embodiment, we clarify the operation of the terminal 20 for LP-WUS and PDCCH monitoring when both cell DTX / DRX and LP-WUS are configured in the terminal 20. Conventionally, the operation of monitoring DCI formats 2_6 (i.e., DCP) / 2_7 / 2_8 / 2_9 by the terminal 20 is not affected even during a cell DTX inactive period.

[0081] According to the third embodiment, when PDCCH monitoring is triggered by LP-WUS in the terminal 20, the terminal 20 may assume that it will monitor at least one of DCI format 2_6, DCI format 2_7, DCI format 2_8, DCI format 2_9, other group-common DCI formats, or conventional DCI formats in PDCCH opportunities in the cell during the cell DTX inactive period of the cell. The terminal 20 performs an operation based on this assumption.

[0082] According to the third embodiment, when PDCCH monitoring is triggered by LP-WUS in the terminal 20, the terminal 20 may assume that it will not monitor at least one of DCI format 2_6, DCI format 2_7, DCI format 2_8, DCI format 2_9, other group-common DCI formats, or conventional DCI formats in PDCCH opportunities in the cell during the cell DTX inactive period of the cell. The terminal 20 performs an operation based on this assumption.

[0083] Example 3-1 If cell DTX / DRX and LP-WUS monitoring is configured in the cell for the terminal 20, the terminal 20 may monitor the LP-WUS during the cell DTX inactive period of the cell.

[0084] When PDCCH monitoring is triggered by LP-WUS, the terminal 20 may perform at least one of the following (Alt. 1-1), (Alt. 1-1A), (Alt. 1-2), (Alt. 1-2A), (Alt. 1-3) or (Alt. 1-3A).

[0085] (Alt. 1-1) As in the example of Alt. 1-1 in FIG. 7, the terminal 20 monitors the PDCCH only during the cell DTX active period, and does not monitor the PDCCH during the cell DTX inactive period.

[0086] (Alt. 1-1a) As in the example of Alt. 1-1a in FIG. 8, the terminal 20 monitors the PDCCH of DCI format set A during the cell DTX active period, and monitors the PDCCH of DCI format set B during the cell DTX inactive period.

[0087] DCI format set A is a DCI format that can be monitored during a cell DTX active period. DCI format set B is a DCI format (for example, DCI formats 2_6 / 2_7 / 2_8 / 2_9) that can be monitored during a cell DTX inactive period.

[0088] (Alt. 1-2) As in the example of Alt. 1-2 in FIG. 7, the terminal 20 monitors the PDCCH regardless of whether the PDCCH opportunity falls within a cell DTX active period or a cell DTX inactive period.

[0089] (Alt. 1-2a) As in the example of Alt. 1-2a in FIG. 8, the terminal 20 monitors the PDCCH of the same DCI format set A regardless of whether the PDCCH opportunity falls within a cell DTX active period or a cell DTX inactive period.

[0090] (Alt. 1-3) As in the example of Alt. 1-3 in FIG. 7, if a part of the PDCCH opportunity is included in the cell DTX inactive period, the terminal 20 does not monitor the PDCCH.

[0091] (Alt. 1-3a) As in the example of Alt. 1-3a in FIG. 8, when a part of a PDCCH opportunity is included in a cell DTX inactive period, terminal 20 monitors only the PDCCH of the same DCI format set B.

[0092] (Example 3-2) If cell DTX / DRX and LP-WUS monitoring is configured in the cell for the terminal 20, the terminal 20 may not monitor the LP-WUS during the cell DTX inactive period of the cell.

[0093] (Example 3-3) When cell DTX / DRX and LP-WUS monitoring are configured in a cell for the terminal 20, the terminal 20 may not assume that the LP-WUS MO completely or partially overlaps with the cell DTX inactive period of the cell, and the terminal 20 performs operations based on this assumption.

[0094] When PDCCH monitoring is triggered by LP-WUS, in a cell where cell DTX / DRX is configured, terminal 20 may monitor the PDCCH based on at least one of (Alt. 1-1), (Alt. 1-1a), (Alt. 1-2), (Alt. 1-2a), (Alt. 1-3) or (Alt. 1-3a) in the above Example 3-1.

[0095] In this way, according to the third embodiment, it is possible to clarify how a terminal configured with both LP-WUS and cell DTX / DRX should perform PDCCH monitoring.

[0096] (Device configuration) Next, a description will be given of an example of the functional configuration of the base station 10 and the terminal 20 that execute the processes and operations described above. The base station 10 and the terminal 20 include functions for implementing the above-described embodiments. However, the base station 10 and the terminal 20 may each include only a part of the functions of the embodiments.

[0097] <Base station> Fig. 9 is a diagram showing an example of the functional configuration of the base station 10 in this embodiment. As shown in Fig. 9, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Fig. 9 is merely an example. The functional divisions and names of the functional units may be any names as long as they can execute the operations according to this embodiment.

[0098] The transmitter 110 includes a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The transmitter 110 also transmits setting information, instructions, notifications, etc. related to a low-power wake-up signal to the terminal 20. The transmitter 110 also transmits notifications related to switching of monitoring operations to the terminal. The receiver 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of higher layers from the received signals. The transmitter 110 also has a function of transmitting PSS, SSS, PBCH, DL / UL control signals, etc. to the terminal 20. The receiver 120 also receives inter-network node messages from other network nodes.

[0099] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20. The content of the setting information is, for example, information related to measurements of low-power signals.

[0100] As described in the embodiments, the control unit 140 controls settings, instructions, and notifications related to low-power wake-up signals, etc. A functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and a functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120.

[0101] <terminal> Fig. 10 is a diagram showing an example of the functional configuration of the terminal 20 in this embodiment. As shown in Fig. 10, the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Fig. 10 is merely an example. As long as the operations according to this embodiment can be performed, the names of the functional divisions and functional units may be any. The transmitting unit 210 and the receiving unit 220 may be collectively referred to as a communication unit.

[0102] The transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The transmitter 210 also transmits capability information related to the low-power wake-up signal to the base station 10. The receiver 220 receives various signals wirelessly and acquires higher layer signals from the received physical layer signals. The receiver 220 also has a function of receiving PSS, SSS, PBCH, DL / UL / SL control signals, and the like transmitted from the base station 10. The receiver 220 also receives paging notification information and configuration information, instructions, and notifications related to the low-power wake-up signal from the base station 10. For example, the receiver 220 receives the low-power wake-up signal from the base station 10. The configuration unit 230 stores various configuration information received by the receiver 220 from the base station 10. The configuration unit 230 also stores pre-configured configuration information. The configuration information includes, for example, information related to measurements of the low-power signal.

[0103] As described in the embodiments, the control unit 240 controls the settings, instructions, and notifications related to the low-power wake-up signal. The function unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the function unit related to signal reception in the control unit 240 may be included in the receiving unit 220.

[0104] (Hardware configuration) The block diagrams (FIGS. 9 and 10) used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and connected directly or indirectly (for example, by wire, wirelessly, etc.). The functional block may be realized by combining software with the one device or the multiple devices.

[0105] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, regard, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0106] For example, the base station 10, the terminal 20, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 11 is a diagram illustrating an example of the hardware configuration of the base station 10 and the terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 described above may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0107] In the following description, the term "apparatus" can be read as a circuit, a device, a unit, etc. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0108] Each function in the base station 10 and the terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001, the memory device 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls at least one of reading and writing data in the memory device 1002 and the auxiliary memory device 1003.

[0109] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 140, control unit 240, etc. may be realized by the processor 1001.

[0110] Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes in accordance with the programs. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 140 of the base station 10 shown in FIG. 9 may be implemented by a control program stored in the storage device 1002 and executed by the processor 1001. Furthermore, for example, the control unit 240 of the terminal 20 shown in FIG. 10 may be implemented by a control program stored in the storage device 1002 and executed by the processor 1001. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line.

[0111] The storage device 1002 is a computer-readable recording medium and may be configured, for example, by at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The storage device 1002 may also be called a register, a cache, a main memory, etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.

[0112] The secondary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. The above-mentioned storage medium may be, for example, a database, a server, or other suitable medium including at least one of the storage device 1002 and the secondary storage device 1003.

[0113] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, a transmission / reception antenna, an amplifier unit, a transmission / reception unit, a transmission path interface, etc. may be realized by the communication device 1004. The transmission / reception unit may be implemented as a transmission unit and a reception unit that are physically or logically separated.

[0114] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0115] Furthermore, each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0116] Furthermore, base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

[0117] Fig. 12 shows an example configuration of a vehicle 2001. As shown in Fig. 12, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in the present disclosure may be applied to a communication device mounted on the vehicle 2001, and may be applied to the communication module 2013, for example.

[0118] The drive unit 2002 is configured, for example, by an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0119] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0120] The signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a front or rear wheel rotation speed signal obtained by a rotation speed sensor 2022, a front or rear wheel air pressure signal obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0121] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various types of information, such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 2012 uses information acquired from external devices via the communication module 2013 or the like to provide various types of multimedia information and multimedia services to the occupants of the vehicle 2001. The information service unit 2012 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that output information to the outside.

[0122] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as a millimeter-wave radar, a LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high-definition (HD) map, autonomous vehicle (AV) map, etc.), a gyro system (e.g., an IMU (Inertial Measurement Unit), an INS (Inertial Navigation System), etc.), an AI (Artificial Intelligence) chip, and an AI processor, as well as one or more ECUs that control these devices. The driving assistance system unit 2030 also transmits and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0123] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided in the vehicle 2001.

[0124] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station, a mobile station, or the like.

[0125] The communication module 2013 may transmit at least one of signals from the above-mentioned various sensors 2021-2028 input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above-mentioned input.

[0126] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle-to-vehicle information, etc.) transmitted from external devices and displays it on an information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 2013). The communication module 2013 also stores the various information received from external devices in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.

[0127] (Configuration of this embodiment) (Additional note 1) a receiver for receiving a low power wake-up signal from a base station in a first cell; a control unit that sets information about the low power wake-up signal in the terminal; The control unit sets or does not set cell DTX (Discontinuous Transmission) / DRX (Discontinuous Reception) for the terminal, for each of one or more cells including the first cell or for the first cell.

[0128] (Additional note 2) Item 1. The terminal according to item 1, wherein C-DRX (Connected-DRX) is set in the terminal.

[0129] (Additional note 3) When C-DRX (Connected-DRX) is not set in the terminal, the control unit sets or does not set the cell DTX / DRX in the terminal for each cell associated with the low power wake-up signal, The terminal according to Supplementary claim 1, wherein the cells associated with the wake-up signal for low power are all cells in a cell group or a MAC (Media Access Control) entity associated with the wake-up signal for low power.

[0130] (Additional note 4) The monitoring opportunity for the low power wake-up signal at least partially overlaps with an active period of the cell DTX / DRX, or The cell DTX / DRX cycle is an integer multiple of the monitoring cycle of the low power wakeup signal, or 2. The terminal according to claim 1, wherein the monitoring period of the low power wakeup signal is an integer multiple of the period of the cell DTX / DRX.

[0131] (Additional note 5) A terminal as described in Appendix 1, wherein when monitoring of a physical downlink control channel is triggered by the low power wake-up signal, the control unit monitors at least one of DCI format 2_6, DCI format 2_7, DCI format 2_8, or DCI format 2_9 in the physical downlink control channel in the cell during an inactive period of the cell DTX of the cell.

[0132] (Additional note 6) A communication method performed by a terminal, comprising: receiving a low power wake-up signal from a base station at a first cell; setting information about the low power wake-up signal in the terminal; A communication method comprising a step of setting or not setting cell DTX (Discontinuous Transmission) / DRX (Discontinuous Reception) in the terminal for each of one or more cells including the first cell or for the first cell.

[0133] Any of the above configurations clarifies the operation in a terminal in which both LP-WUS and cell DTX / DRX are configured, and enables appropriate LP-WUS monitoring and cell DTX / DRX operations to be performed. Supplementary clauses 1-3 and 6 make it clear how cell DTX / DRX should be configured in a terminal in which LP-WUS is configured. Supplementary clause 4 makes it possible to specify the timing of cell DTX / DRX and LP-WUS MO. Supplementary clause 5 makes it clear how a terminal in which both LP-WUS and cell DTX / DRX are configured should perform PDCCH monitoring.

[0134] (Supplementary explanation of the embodiment) Although the present embodiment has been described above, the disclosed invention is not limited to such an embodiment, and those skilled in the art will understand various modifications, alterations, alternatives, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; matters described in two or more items may be used in combination as needed, and matters described in one item may apply to matters described in another item (unless inconsistent). The boundaries between functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of the processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 have been described using functional block diagrams. However, such devices may be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to this embodiment and the software operated by the processor of the terminal 20 according to this embodiment may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

[0135] Furthermore, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling), broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0136] Each aspect / embodiment described in the present disclosure may be applied to at least one of a system using LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (New Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark), IEEE 802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), or other appropriate system, and a next-generation system extended based on these. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A and 5G) may also be applied.

[0137] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described herein may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order and are not limited to the particular order presented.

[0138] In this specification, a specific operation that is described as being performed by the base station 10 may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having the base station 10, it is clear that various operations performed for communication with the terminal 20 may be performed by at least one of the base station 10 and another network node other than the base station 10 (such as, but not limited to, an MME or an S-GW). Although the above example illustrates a case where there is one other network node other than the base station 10, the other network node may be a combination of multiple other network nodes (such as an MME and an S-GW).

[0139] The information, signals, etc. described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input / output via multiple network nodes.

[0140] Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

[0141] In the present disclosure, the determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0142] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0143] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0144] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0145] Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0146] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0147] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or other corresponding information. For example, a radio resource may be indicated by an index.

[0148] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0149] In the present disclosure, terms such as "base station (BS)," "radio base station," "base station device," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0150] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0151] In the present disclosure, the base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.

[0152] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0153] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0154] At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, etc. The mobile object refers to a movable object, and may move at any speed. Naturally, this also includes cases where the mobile object is stationary. Examples of the mobile object include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon. The mobile object may also be a mobile object that moves autonomously based on an operational command. It may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0155] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0156] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station may be configured to have the functions of the user terminal described above.

[0157] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0158] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using at least one of one or more wires, cables, and printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0159] The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.

[0160] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0161] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0162] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0163] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0164] A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0165] Numerology may be communication parameters applied to at least one of transmission and reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0166] A slot may be configured of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may be a time unit based on numerology.

[0167] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0168] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0169] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0170] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units. Note that the definition of TTI is not limited to this.

[0171] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0172] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0173] A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0174] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0175] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0176] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0177] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0178] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0179] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within the BWP.

[0180] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0181] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0182] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0183] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0184] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0185] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0186] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure. [Explanation of symbols]

[0187] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 terminals 210 Transmitter 220 Receiving unit 230 Setting Section 240 Control Unit 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication equipment 1005 Input Device 1006 Output Device 2001 Vehicle 2002 Drive unit 2003 Steering Section 2004 accelerator pedal 2005 brake pedal 2006 Shift Lever 2007 front wheel 2008 rear wheel 2009 Axle 2010 Electronic Control Unit 2012 Information Services Department 2013 Communication Module 2021 Current Sensor 2022 RPM Sensor 2023 Air Pressure Sensor 2024 Vehicle speed sensor 2025 Acceleration Sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor 2030 Driving Assistance Systems Department 2031 microprocessor 2032 memory (ROM, RAM) 2033 Communication port (IO port)

Claims

1. a receiver for receiving a low power wake-up signal from a base station in a first cell; a control unit that sets information about the low power wake-up signal in the terminal; The control unit sets or does not set cell DTX (Discontinuous Transmission) / DRX (Discontinuous Reception) for the terminal, for each of one or more cells including the first cell or for the first cell. A terminal.

2. The terminal according to claim 1 , wherein C-DRX (Connected-DRX) is configured in the terminal.

3. When C-DRX (Connected-DRX) is not set in the terminal, the control unit sets or does not set the cell DTX / DRX in the terminal for each cell associated with the low power wake-up signal, The terminal according to claim 1 , wherein the cells associated with the wake-up signal for low power are all cells in a cell group or a media access control (MAC) entity associated with the wake-up signal for low power.

4. The monitoring opportunity for the low power wake-up signal at least partially overlaps with an active period of the cell DTX / DRX, or The cell DTX / DRX cycle is an integer multiple of the monitoring cycle of the low power wakeup signal, or The terminal according to claim 1 , wherein a monitoring period of the low power wake-up signal is an integer multiple of a period of the cell DTX / DRX.

5. 2. The terminal of claim 1, wherein when monitoring of a physical downlink control channel is triggered by the low power wake-up signal, the control unit monitors at least one of DCI format 2_6, DCI format 2_7, DCI format 2_8, or DCI format 2_9 in the physical downlink control channel in the cell during an inactive period of the cell DTX of the cell.

6. A communication method performed by a terminal, comprising: receiving a low power wake-up signal from a base station in a first cell; setting information about the low power wake-up signal in the terminal; A communication method comprising a step of setting or not setting cell DTX (Discontinuous Transmission) / DRX (Discontinuous Reception) in the terminal for each of one or more cells including the first cell or for the first cell.

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