Terminal and communication method

Abstract

To clarify procedures regarding low power wake-up signaling (LP-WUS) operation and physical downlink control channel (PDCCH) skipping.SOLUTION: A terminal includes a control unit that sets a low power wake-up signal and sets connected mode discontinuous reception, and a receiving unit that receives the low power wake-up signal, and it is assumed that the control unit is capable of setting or not capable of setting skipping of the physical downlink control channel.SELECTED DRAWING: Figure 8

Description

[Technical Field]

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

[0002] Technologies are being considered for realizing further increases in 3GPP (registered trademark) 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, in 3GPP Rel-19, technologies for low-power wake-up signals (LP (Low Power)-WUS (Wake Up Signal)) and LP-WUR (Wake Up Receiver) for receiving LP-WUS are being discussed in order to reduce power consumption in wireless communication systems. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] 3GPP TS 38.300 V18.2.0(2024-06) [Non-patent document 2] 3GPP TS 38.401 V18.2.0(2024-06) Summary of the Invention [Problem to be solved by the invention]

[0004] 3GPP Release 19 is considering a procedure for triggering physical downlink control channel (PDCCH) monitoring using low-power wakeup signals (LP-WUS) in RRC_CONNECTED mode, in which a radio resource control (RRC) connection between a terminal and a base station is established. Meanwhile, 3GPP Rel-17 specifies skipping of the physical downlink control channel (PDCCH) to reduce power consumption. However, the procedure for skipping the downlink control channel (PDCCH) when operating with low-power wakeup signals (LP-WUS) is not clarified.

[0005] The present invention has been made in view of the above points, and aims to clarify procedures regarding low power wake-up signal (LP-WUS) operation and physical downlink control channel (PDCCH) skipping. [Means for solving the problem]

[0006] According to the disclosed technology, a terminal is provided that has a control unit that sets a low-power wake-up signal and sets a connected mode intermittent reception, and a receiving unit that receives a low-power wake-up signal, and the control unit assumes that skipping of a physical downlink control channel can or cannot be set. [Effects of the Invention]

[0007] According to the disclosed technology, it is possible to clarify procedures regarding low power wake-up signal (LP-WUS) operation and physical downlink control channel (PDCCH) skipping. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 2] 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 3] FIG. 2 is a diagram for explaining communication between an LP-WUS and an LP-WUR according to an embodiment of the present invention. [Figure 4] FIG. 2 is a diagram for explaining communication between an LP-WUS and an LP-WUR according to an embodiment of the present invention. [Figure 5] FIG. 1 is a diagram for explaining the agreements made in 3GPP. [Figure 6] FIG. 1 is a diagram for explaining the agreements made in 3GPP. [Figure 7] FIG. 1 is a diagram for explaining downlink control channel (PDCCH) skipping. [Figure 8] 1 is a diagram illustrating an example of downlink control channel (PDCCH) skipping according to an embodiment of the present invention. FIG. [Figure 9] 10A and 10B are diagrams illustrating an example of LP-WUS operation when C-DRX and PDCCH skipping are not configured in an embodiment of the present invention. [Figure 10] 1 is a diagram illustrating an example of downlink control channel (PDCCH) skipping according to an embodiment of the present invention. FIG. [Figure 11] 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention. [Figure 12] FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to the embodiment of the present invention. [Figure 13] 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention. [Figure 14] FIG. 2 is a diagram showing an example of the configuration of a vehicle 2001 according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described 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] In the operation of the wireless communication system according to the embodiment of the present invention, existing technologies are used as appropriate. However, the existing technologies are, for example, but not limited to, the existing LTE. Furthermore, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and systems subsequent to LTE-Advanced (e.g., NR) unless otherwise specified.

[0011] Furthermore, in the embodiments of the present invention described below, terms used in existing LTE, 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. The above-mentioned terms in NR are referred to as SS, PSS, SSS, PBCH, PRACH, etc. without any particular distinction from LTE.

[0012] Furthermore, in the embodiments of the present invention, the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, Flexible Duplex, etc.).

[0013] Furthermore, in the embodiments of the present invention, when radio parameters and the like are "configured," it may mean that predetermined values ​​are 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 according to an embodiment of the present invention. As shown in Fig. 1, the wireless communication system according to the embodiment of the present invention 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 or a PDSCH and is also referred to as broadcast information. The synchronization signal and system information may also 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] Fig. 2 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. Fig. 2 shows an example of the configuration of a wireless communication system in which DC (Dual connectivity) is implemented. As shown in Fig. 2, a base station 10A serving as an MN (Master Node) and a base station 10B serving as an SN (Secondary Node) are provided. The base station 10A and the base station 10B are each connected to a core network. The terminal 20 can communicate with both the base station 10A and the base station 10B.

[0018] A cell group provided by base station 10A, which is an MN, is called an MCG (Master Cell Group), and a cell group provided by base station 10B, which is an SN, is called an SCG (Secondary Cell Group). In addition, in a DC, an MCG is composed of one PCell and one or more SCells, and an SCG is composed of one PSCell (Primary SCG Cell) and one or more SCells.

[0019] The processing operations in this embodiment may be executed in the system configuration shown in Fig. 1, in the system configuration shown in Fig. 2, or in other system configurations. In the following description, " / " means "and / or" unless otherwise specified or unless it is clear from the context that it has a different meaning.

[0020] FIG. 3 is a diagram illustrating communication using LP-WUS and LP-WUR in an embodiment of the present invention. A power consumption reduction technology called "Low-Power Wake Up Signal and Receiver" is currently under discussion in 3GPP (registered trademark) Rel-19. The low-power wake-up signal (Low-Power Wake Up Signal) is referred to as LP-WUS or simply WUS, and the low-power wake-up signal receiver (Low-Power Wake Up Receiver) is referred to as LP-WUR, WUR, or LR. As shown in FIG. 3(a), a state called ultra-deep sleep (UDS) is introduced by operating an LR, which is a simplified circuit that operates with lower power consumption than the main radio (MR) used in normal data communication. Furthermore, as shown in FIG. 3(a) or 3(b), the power of the MR may be turned off or on when the LR receives an LP-WUS signal. In this way, the low power wakeup signal (LP-WUS) can also be considered a control signal used to switch the state of the MR. Switching the state of the MR may be, for example, switching the power ON or OFF, or switching between the ON state and the sleep state. Alternatively, the low power wakeup signal (LP-WUS) can be considered a signal indicating whether or not to monitor a PO (Paging Occasion) (whether or not paging is being sent to the own terminal), as described in FIG. 4. Furthermore, the low power wakeup signal (LP-WUS) may be a predetermined sequence, or may be information included in the DCI (for example, PEI (Paging Early Indication)).

[0021] Fig. 4 is a diagram for explaining communication by LP-WUS and LP-WUR in an embodiment of the present invention. In 3GPP, the functional details of the application method are under discussion for the RRC connection state in any of RRC CONNECTED, IDLE, and INACTIVE. It is under consideration to use the LP-WUS for CONNECTED as an instruction for PDCCH monitoring following LP-WUS, and for IDLE / INACTIVE as an instruction for Paging PDCCH monitoring following LP-WUS. As shown in Fig. 4, for example, in RRC IDLE, the LP-WUS is transmitted as information indicating whether or not PO should be monitored. Furthermore, when the LR receives the LP-WUS and determines that PO should be monitored, the MR is activated and the subsequent processing is executed. In addition, 3GPP is currently discussing the possibility of supporting a 1:N relationship between LP-WUS Monitoring Occasion (MO) / Low-Power-Synchronization Signal (LP-SS) transmissions and Synchronization Signal Block beams in addition to supporting a 1:1 relationship.

[0022] In addition, 3GPP Rel-19 is considering specifying procedures for LP-WUS triggered PDCCH monitoring in the UE's primary radio (UE MR) in connected mode, including procedures for enabling and disabling the LP-WUS monitoring procedure. Here, in connected mode, the ultra-deep sleep of the UE's primary radio (UE MR) is not taken into consideration, and the UE measures RRM (Radio Resource Management), RLM (Radio Link Monitoring), BFD (Beam Failure Detection), and CSI (Channel State Information) using the MR.

[0023] Figure 5 is a diagram for explaining the agreements made in 3GPP. The contents shown in Figure 5 have been agreed upon in 3GPP RAN1. As shown in Figure 5, the following Option 1-1 / Option 1-2 are assumed in the LP-WUS operation in connected mode.

[0024] (Option 1-1) For periodic CSI (Channel State Information) / L1-RSRP (Reference Signal Received Power at the Physical Layer (Layer 1)) reporting, similar to DCP (Dormancy and Connected mode Power saving) in Rel-16, the terminal is configured with one of the following: If the terminal is not instructed to wake up, no periodic CSI / L1-RSRP is reported for the period given by the configured timer (drx-onDurationTimer). · Whether the terminal is instructed to wake up or not, periodic CSI / L1-RSRP is reported periodically for the period given by the configured timer (drx-onDurationTimer).

[0025] In Option 1-1, periodic CSI / L1-RSRP is reported during the active period of C-DRX, as in existing specifications.

[0026] (Option 1-2) For periodic CSI / L1-RSRP reporting, similar to Rel-16 DCP and Option 1-1, the terminal is configured with either: If the terminal is not instructed to wake up, no periodic CSI / L1-RSRP is reported. · Periodic CSI / L1-RSRP is reported periodically regardless of whether the terminal is instructed to wake up or not.

[0027] 6 is a diagram for explaining the agreements made in 3GPP. In 3GPP RAN2, the contents shown in FIG. 6 have been agreed upon.

[0028] 7 is a diagram for explaining physical downlink control channel (PDCCH) skipping. As shown in FIG. 7, 3GPP Rel-17 specifies skipping of the physical downlink control channel (PDCCH) in order to reduce power consumption of a terminal. DCI (Downlink Control Information) includes information instructing PDCCH skipping, and PDCCH monitoring is skipped (monitoring is not performed) from the beginning of the slot after the slot in which the DCI is received to the specified slot.

[0029] Here, Section 11 of TS38.300 of the 3GPP standard specifies that this skipping restricts the monitoring of PDCCH in the active BWP (Band Width Part) of the serving cell, and does not affect other operations (e.g., Down Link Reference Signal (DL RS)) / PDSCH reception, Uplink (UL) PUSCH / SRS (Sounding Reference Signal) / SR (Scheduling Request) transmission).

[0030] Section 10.4 of the 3GPP standard TS38.213 specifies that a UE is provided with a set of skip durations by pdcch-SkippingDurationList for a Type3-PDCCH CSS set or a UE-specific Search Space (USS) set for PDCCH monitoring on an active DL BWP of a serving cell. It also specifies that if a PDCCH monitoring adaptation field instructs a UE to skip PDCCH monitoring for a certain period in an active DL BWP of a serving cell, the UE starts skipping PDCCH monitoring at the start of the first slot after the last symbol of PDCCH reception that provides a DCI format including the PDCCH monitoring adaptation field. It also specifies that if Discontinuous Reception (DRX) is configured and the DRX group of the serving cell is outside of its active time, the UE ends PDCCH skipping for the serving cell.

[0031] The following describes procedures related to low power wakeup signal (LP-WUS) operation and physical downlink control channel (PDCCH) skipping. Method 1 describes LP-WUS configuration and restrictions, and PDCCH skipping. Method 2 describes LP-WUS operation and PDCCH skipping when connected mode discontinuous reception (C-DRX) is configured in the terminal. Method 3 describes LP-WUS operation and PDCCH skipping when connected mode discontinuous reception (C-DRX) is not configured in the terminal. Methods 1, 2, and 3 may also be used in combination.

[0032] (Method 1) Method 1 describes the configuration and restrictions of LP-WUS and PDCCH skipping.

[0033] The base station 10 / terminal 20 may assume at least one of the following operations when the terminal 20 is in a connected mode and performs both LP-WUS and C-DRX configuration.

[0034] (Alt.1-1) PDCCH skipping may or may not be configurable for the terminal 20 .

[0035] (Alt.1-2) PDCCH skipping may or may not be configurable for a cell (cell / PCell / PSCell / Scell / SpCell) in terminal 20.

[0036] (Alt.1-3) PDCCH skipping may or may not be configurable for the cell from which the terminal 20 receives the LP-WUS.

[0037] (Alt.1-4) PDCCH skipping may or may not be configured for a cell associated with a cell group and for which LP-WUS operation is configured for the cell group. Here, the LP-WUS operation of the terminal 20 may include the operation shown in Option 1-1 / Option 1-2 shown in FIG. 5.

[0038] (Alt.1-5) PDCCH skipping may not be configurable or operable simultaneously with LP-WUS for the terminal 20. For example, if LP-WUS is enabled, the terminal 20 may ignore the instruction to skip PDCCH or resume PDCCH monitoring.

[0039] In addition, when the terminal 20 is in CONNECTED mode and is performing LP-WUS configuration but not C-DRX configuration, the base station 10 / terminal 20 may assume one or more of Alt.2-1 to Alt.2-5 and Alt.1-5 below.

[0040] (Alt.2-1) PDCCH skipping may or may not be configurable for the terminal 20 .

[0041] (Alt.2-2) PDCCH skipping may or may not be configurable for a cell (cell / PCell / PSCell / Scell / SpCell) in terminal 20.

[0042] (Alt.2-3) PDCCH skipping may or may not be configurable for the cell from which the terminal 20 receives the LP-WUS.

[0043] (Alt.2-4) PDCCH skipping may or may not be configurable for cells associated / not associated with the LP-WUS of the terminal 20.

[0044] (Alt.2-5) PDCCH skipping may or may not be configurable for cells associated / not associated with LP-WUS in the operation shown in Option 1-1 / Option 1-2 in FIG.

[0045] (Alt.1-5) For the terminal 20, PDCCH skipping may or may not be configurable to operate simultaneously with LP-WUS.

[0046] Here, in method 1, "PDCCH skipping can be configured for terminal 20" may mean one or more of the following. The terminal 20 is set with an information element (pdcch-SkippingDurationList) indicating a list of skipping periods for the downlink data channel. The terminal 20 is configured by a field indicating PDCCH monitoring adaptation indication in the DCI.

[0047] Furthermore, in method 1, "PDCCH skipping is not configurable for terminal 20" may mean one or more of the following. The terminal 20 is not configured with an information element (pdcch-SkippingDurationList) indicating a list of skipping periods for the downlink data channel. It is not assumed that the terminal 20 is configured with a field indicating PDCCH monitoring adaptation indication in the DCI. The terminal 20 may receive DCI including the "PDCCH monitoring adaptation indication" field, but ignore the indication of PDCCH skipping.

[0048] (Method 2) In method 2, LP-WUS operation and PDCCH skipping will be described when discontinuous reception in connected mode (C-DRX) is configured in the terminal.

[0049] When the terminal 20 is configured with LP-WUS operation and PDCCH skipping of Option 1-1 / Option 1-2 shown in Figure 5 and PDCCH skipping is instructed to the terminal 20, the base station 10 / terminal 20 may assume at least one of the following operations.

[0050] (Operation during PDCCH skipping) (Alt.1-1) The base station 10 / terminal 20 may assume that the duration of PDCCH skipping does not exceed the expiration of the timer for the terminal to monitor the PDCCH triggered by LP-WUS, where the LP-WUS operation may include the Option 1-1 / Option 1-2 LP-WUS operation shown in Fig. 5.

[0051] (Alt.1-2) The base station 10 / terminal 20 may assume that the duration of PDCCH skipping exceeds the expiration of the timer for the terminal to monitor the PDCCH triggered by LP-WUS, where the LP-WUS operation may include the Option 1-1 / Option 1-2 LP-WUS operation shown in Fig. 5 .

[0052] (Terminal operation when the PDCCH skipping period is longer than the period during which discontinuous reception is active (DRX active time)) (Alt.1-2) FIG. 8 is a diagram illustrating an example of downlink control channel (PDCCH) skipping according to an embodiment of the present invention.

[0053] The base station 10 / terminal 20 may assume that if the period of PDCCH skipping extends outside the DRX active time, the terminal 20 will end PDCCH skipping for the cell and start LP-WUS monitoring from the start of the outside active time.

[0054] Furthermore, the base station 10 / terminal 20 may assume at least one of the following: During the PDCCH skipping period, the terminal 20 monitors / does not monitor the LP-WUS. The terminal 20 terminates PDCCH skipping at the start of the non-active time. The timer that controls the period during which the terminal 20 monitors the PDCCH triggered by the LP-WUS may or may not run after the PDCCH skipping instruction. The terminal 20 starts LP-WUS monitoring from the start of the non-active time / from the first LP-WUS monitoring opportunity after the start of the non-active time. Option 1-1 or Option 1-2 shown in FIG. 5 may be applied to Alt.1-2.

[0055] (Alt.1-2a) The base station 10 / terminal 20 may assume that if the period of PDCCH skipping extends outside the DRX active time, the terminal 20 will end PDCCH skipping for the cell at the end of the outside active time, and further that the terminal 20 will start LP-WUS monitoring from the end of the timer that controls the period for monitoring the PDCCH triggered by the LP-WUS. Furthermore, the base station 10 / terminal 20 may assume at least one of the following: During the PDCCH skipping period, the terminal 20 monitors / does not monitor the LP-WUS. Terminal 20 terminates PDCCH skipping at the start of the non-active period. The terminal 20 starts LP-WUS monitoring when the timer for the period during which the PDCCH is monitored, triggered by the LP-WUS, expires. Option 1-1 or Option 1-2 shown in FIG. 5 may be applied to Alt.1-2a.

[0056] Also, in method 2, the base station 10 / terminal 20 may assume that an additional indication in PDCCH skipping is supported, indicating the end of PDCCH monitoring after a configured offset during the period in which the terminal 20 monitors the PDCCH triggered by the LP-WUS.

[0057] Also, in method 2, the base station 10 / terminal 20 may assume that the PDCCH skipping instruction is applied to each cell / configured cell / PCell / PSCell / Scell / SpCell / enabled cells / all configured cells / cells where LP-WUS is monitored.

[0058] Furthermore, in method 2, the base station 10 / terminal 20 may assume that the PDCCH skipping instruction enables monitoring of LP-WUS when at least one of the conditions Alt.1-3 to Alt.1.5 shown below is satisfied.

[0059] (Alt.1-3) If there is only one cell associated with the LP-WUS, after receiving an indication of PDCCH skipping in that cell, the LP-WUS monitoring is enabled.

[0060] (Alt.1-4) If there are multiple cells associated with the LP-WUS, LP-WUS monitoring is enabled after [one / multiple / all] cells in the multiple cells receive a PDCCH skip indication.

[0061] (Alt.1-5) When the terminal 20 does not meet at least one of the following conditions / scenarios (excluding PDCCH skipping in section 10.4 of TS38.213 of the 3GPP standard): · When the terminal 20 transmits a PUCCH providing a positive scheduling request (positive SR, a request when the terminal 20 has data to transmit) before receiving DCI indicating PDCCH skipping. The period of the response window (ra-ResponseWindow, msgB-ResponseWindow) of the random access procedure, or the period during which the timer (ra-ContentionResolutionTimer) in the random access procedure is running while the terminal 20 receives a DCI indicating PDCCH skipping and the terminal 20 is monitoring the PDCCH triggered by the LP-WUS. When the terminal 20 transmits a PUCCH that provides a positive SR after receiving DCI indicating PDCCH skipping. · If the terminal 20 transmits a PUCCH or PUSCH providing a negative acknowledgement (NACK value) related to PDSCH reception after receiving DCI indicating PDCCH skipping. · If contention resolution is successful after receiving a PDCCH skipping instruction. When the terminal 20 transmits a random access channel with positive SR.

[0062] (Method 3) In method 3, LP-WUS operation and PDCCH skipping will be described when discontinuous reception in connected mode (C-DRX) is not configured in the terminal.

[0063] (When C-DRX and PDCCH skipping are not configured) Fig. 9 is a diagram illustrating an example of LP-WUS operation when C-DRX and PDCCH skipping are not configured according to an embodiment of the present invention. As shown in Fig. 9, terminal 20 may perform PDCCH monitoring in a PDCCH monitoring period (periodicity n) after detecting an LP-WUS in an LP-WUS MO (monitoring opportunity). Alternatively, terminal 20 may perform PDCCH monitoring in an extended PDCCH monitoring period (periodicity n+1) after detecting an LP-WUS in an LP-WUS MO (monitoring opportunity). A different period from that of the previous monitoring period may be applied to the extended PDCCH monitoring period.

[0064] (When C-DRX is not configured and PDCCH skipping is configured) If C-DRX is not configured and LP-WUS is configured, the base station 10 / terminal 20 may assume at least one of the operations shown in Alt. 1 and Alt. 2 below when the terminal 20 receives an instruction to skip PDCCH.

[0065] Fig. 10 is a diagram illustrating an example of downlink control channel (PDCCH) skipping in an embodiment of the present invention. As shown in Fig. 10, terminal 20 may detect an LP-WUS in an LP-WUS MO, and after receiving DCI including a PDCCH skipping instruction, perform PDCCH skipping in a configured skipping slot (Alt. 1). Alternatively, terminal 20 may detect an LP-WUS in an LP-WUS MO, and after receiving DCI including a PDCCH skipping instruction in an LP-WUS MO (periodicity n+1), terminate the PDCCH (Alt. 2).

[0066] (Alt.1) The terminal 20 starts skipping PDCCH monitoring at the start of the first slot after the last symbol of PDCCH reception that provides a DCI format including a field indicating PDCCH monitoring adaptation.

[0067] The terminal 20 does not monitor the LP-WUS during the PDCCH skipping period.

[0068] When terminal 20 [moves to the next periodic LP-WUS monitoring opportunity / moves to the end of the LP-WUS monitoring period / moves to the period of monitoring the PDCCH triggered by the LP-WUS of Option 1-1 or Option 1-2 shown in Figure 5], terminal 20 monitors the LP-WUS.

[0069] (Alt.2) The terminal 20 ends PDCCH skipping and starts LP-WUS monitoring.

[0070] The terminal 20 ends PDCCH monitoring from the time specified by the time offset X from the last symbol of PDCCH reception.

[0071] Terminal 20 starts LP-WUS monitoring from [the time point at which the time offset Y / PDCCH monitoring ends until the first slot after the last symbol of PDCCH reception].

[0072] The values ​​of the offset X and offset Y may be the same or different, and the units of the values ​​of the offset X and offset Y may be ms / s / symbol / slot / subframe.

[0073] If the terminal 20 starts LP-WUS monitoring after receiving a PDCCH skipping instruction, the terminal 20 uses LP-WUS settings (e.g., periodicity, offset, duration, etc.) that are the same as or different from the settings when C-DRX and PDCCH skipping are not configured as shown in Figure 9, or the terminal 20 starts PDCCH monitoring in an extended PDCCH monitoring period (periodicity n+1) and uses settings (e.g., periodicity, offset, duration, etc.) that are the same as or different from the previous monitoring period (periodicity n) in the extended PDCCH monitoring period.

[0074] The above-described embodiments can clarify procedures regarding low power wake-up signal (LP-WUS) operation and physical downlink control channel (PDCCH) skipping.

[0075] (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.

[0076] <Base station 10> Fig. 12 is a diagram showing an example of the functional configuration of base station 10 in the embodiment of the present invention. As shown in Fig. 12, 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. 12 is merely an example. The functional divisions and names of the functional units may be any names as long as they can perform the operations related to the embodiment of the present invention.

[0077] The transmitter 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The transmitter 110 also transmits a low power signal, and setting information, instructions, notifications, etc. related to the low power signal to the terminal 20. The receiver 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer 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.

[0078] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20.

[0079] As described in the embodiments, the control unit 140 controls settings, instructions, and notifications related to low-power signals. The function unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the function unit related to signal reception in the control unit 140 may be included in the receiving unit 120.

[0080] <Terminal 20> Fig. 13 is a diagram showing an example of the functional configuration of terminal 20 in an embodiment of the present invention. As shown in Fig. 13, 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. 13 is merely an example. As long as the operations related to the embodiment of the present invention can be performed, the names of the functional divisions and functional units may be any. Transmitting unit 210 and receiving unit 220 may be collectively referred to as a communication unit.

[0081] The transmitter 210 creates a transmission signal from transmission data and transmits the transmission signal wirelessly. 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, etc. transmitted from the base station 10. The receiver 220 also receives setting information, instructions, notifications, etc. related to low power signals from the base station 10. The receiver 220 also receives low power signals from the base station 10. The setting unit 230 stores various setting information received by the receiver 220 from the base station 10. The setting unit 230 also stores setting information that is set in advance. The setting information includes, for example, information related to settings related to low power signals.

[0082] The control unit 240 performs settings related to low-power signals as described in the embodiments. 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.

[0083] (Hardware configuration) The block diagrams (FIGS. 11 and 12) 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 a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining the single device or the multiple devices with software.

[0084] 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.

[0085] 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. 13 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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. 11 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. Furthermore, for example, the control unit 240 of the terminal 20 shown in FIG. 12 may be implemented by a control program stored in the storage device 1002 and running on 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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).

[0094] 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.

[0095] 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.

[0096] Fig. 14 shows an example configuration of a vehicle 2001. As shown in Fig. 14, 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.

[0097] 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.

[0098] 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).

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle distance 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.

[0106] <Configuration of this embodiment> (Section 1) a control unit that sets a low-power wakeup signal and a connection mode intermittent reception; a receiver for receiving a low-power wake-up signal; The control unit assumes that skipping of the physical downlink control channel is configurable or not configurable. Terminal. (Section 2) a control unit that sets a low-power wakeup signal but does not set a connected mode intermittent reception; a receiver for receiving a low-power wake-up signal; The terminal assumes that the control unit is capable of setting skipping of a physical downlink control channel or is not capable of setting skipping. (Section 3) The control unit assumes that skipping of a physical downlink control channel is configurable or not configurable for a cell that receives a low power wakeup signal. 2. A terminal according to claim 1 or 2. (Section 4) the control unit assumes that the duration of skipping of the physical downlink control channel does not exceed the expiration of a timer for monitoring the physical downlink control channel triggered by a low power wakeup signal; 1. The terminal described in paragraph 1. (Section 5) the control unit starts skipping the physical downlink control channel at a start point of a first slot after a last symbol in the physical downlink control channel, the format of the downlink control information including a field indicating monitoring adaptability of the physical downlink control channel. 2. The terminal described in paragraph 2. (Section 6) A step of configuring a low power wake-up signal and configuring a connected mode discontinuous reception; receiving a low power wake-up signal; Assume that skipping of a physical downlink control channel is configurable or not configurable; A communication method performed by a terminal having the

[0107] Any of the above configurations can clarify procedures regarding low power wake-up signal (LP-WUS) operation and physical downlink control channel (PDCCH) skipping.

[0108] (Supplementary explanation of the embodiment) Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, 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; two or more items may be combined as needed, and items described in one item may apply to items 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 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention 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.

[0109] 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.

[0110] Each aspect / embodiment described in the present disclosure may be applied to at least one of systems 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-Wideband), Bluetooth (registered trademark), or other appropriate systems, and next-generation systems extended based on these. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G, etc.) may also be applied.

[0111] 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.

[0112] 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).

[0113] The information or signals 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.

[0114] 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.

[0115] 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).

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0121] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by an index.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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 one or more wires, cables, and / or 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.

[0133] The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.

[0134] 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."

[0135] 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.

[0136] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0137] 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.

[0138] 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.

[0139] Numerology may be communication parameters that apply 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.

[0140] A slot may be composed 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.

[0141] 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.

[0142] 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.

[0143] 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 (for example, 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.

[0144] 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.

[0145] 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.

[0146] 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.

[0147] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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 that BWP.

[0154] 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.

[0155] 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."

[0156] 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.

[0157] 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.

[0158] 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."

[0159] 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).

[0160] 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]

[0161] 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 control unit that sets a low-power wakeup signal and a connection mode intermittent reception; a receiver for receiving a low-power wake-up signal; The control unit assumes that skipping of the physical downlink control channel is configurable or not configurable. Terminal.

2. a control unit that sets a low-power wakeup signal but does not set a connected mode intermittent reception; a receiver for receiving a low power wake-up signal; The terminal assumes that the control unit is capable of setting skipping of a physical downlink control channel or is not capable of setting skipping.

3. The control unit assumes that skipping of a physical downlink control channel is configurable or not configurable for a cell that receives a low power wakeup signal. The terminal according to claim 1 or claim 2.

4. the control unit assumes that the duration of skipping of the physical downlink control channel does not exceed the expiration of a timer for monitoring the physical downlink control channel triggered by a low power wakeup signal; The terminal according to claim 1 .

5. the control unit starts skipping the physical downlink control channel at a start point of a first slot after a last symbol in the physical downlink control channel that provides a format of downlink control information including a field indicating monitoring adaptability of the physical downlink control channel. The terminal according to claim 2.

6. A step of configuring a low power wake-up signal and configuring a connected mode discontinuous reception; receiving a low power wake-up signal; Assume that skipping of a physical downlink control channel is configurable or not configurable; A communication method performed by a terminal having the

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