Terminal and communication method

Abstract

This terminal comprises a reception unit that receives a low-power wake-up signal from a base station, and a control unit that controls the execution of the PDCCH monitoring on the basis of the low-power wake-up signal. The payload of the low-power wake-up signal includes information that triggers the PDCCH monitoring for one terminal or a group including one or more terminals. The control unit executes the PDCCH monitoring when the terminal is associated with the information.

Description

Terminal and communication method

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

[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 (e.g., Non-Patent Documents 1 and 2). Furthermore, 3GPP Rel-19 is discussing low-power wake-up signal (LP (Low Power)-WUS (Wake Up Signal)) / LP-WUR (Wake Up Receiver) technologies for reducing power consumption in wireless communication systems.

[0003] 3GPP TS 38.300 V18.0.0(2023-12)3GPP TS 38.401 V18.0.0(2023-12)

[0004] However, conventional standards do not specify the payload structure of LP-WUS, and there is a risk that a UE (User Equipment) in RRC CONNECTED mode may not be able to properly perform PDCCH monitoring triggered by LP-WUS.

[0005] In this embodiment, the terminal comprises a receiving unit that receives a low-power wake-up signal from a base station, and a control unit that controls the execution of the PDCCH monitoring based on the low-power wake-up signal, the payload of the low-power wake-up signal includes information that triggers the PDCCH monitoring for one terminal or a group including one or more terminals, and the control unit performs the PDCCH monitoring when the terminal is associated with the information.

[0006] According to this embodiment, the payload configuration of a low power wakeup signal in a wireless communication system is defined, and PDCCH monitoring triggered by the low power wakeup signal can be appropriately performed.

[0007] 1 is a diagram for explaining a wireless communication system in this embodiment. FIG. 1 is a diagram showing an example of the operation of a terminal in accordance with the setting of the payload size of an LP-WUS in this embodiment. FIG. 2 is a diagram showing an example of the configuration of a bitmap-based instruction of an LP-WUS in this embodiment. FIG. 3 is a diagram showing an example of the payload configuration of an LP-WUS in this embodiment. FIG. 4 is a diagram showing an example of the configuration of a time window (Alt. 1) for LP-WUS monitoring in this embodiment. FIG. 5 is a diagram showing an example of the configuration of a time window (Alt. 2-1) for LP-WUS monitoring in this embodiment. FIG. 6 is a diagram showing an example of the configuration of a time window (Alt. 2-2) for LP-WUS monitoring in this embodiment. FIG. 7 is a diagram showing an example of the configuration of an ID-based instruction of an LP-WUS in this embodiment. FIG. 8 is a diagram showing an example of the functional configuration of a base station in this embodiment. FIG. 9 is a diagram showing an example of the functional configuration of a terminal in this embodiment. FIG. 10 is a diagram showing an example of the hardware configuration of a base station or a terminal in this embodiment. FIG. 11 is a diagram showing an example of the configuration of a vehicle in this embodiment.

[0008] 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.

[0009] In the operation of the wireless communication system of this embodiment, existing technology is used as appropriate. However, the existing technology is, for example, the existing LTE, but is not limited to the existing LTE. Furthermore, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and systems after LTE-Advanced (e.g., NR), unless otherwise specified.

[0010] In the present embodiment described below, terms 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) used in existing LTE 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.

[0011] In addition, in this embodiment, the duplex method may be a time division duplex (TDD) method, a frequency division duplex (FDD) method, or another method (for example, flexible duplex, etc.).

[0012] Furthermore, in this embodiment, "configuring" radio parameters etc. may mean that predetermined values ​​are pre-configured, or that radio parameters notified from the base station 10 or the terminal 20 are set.

[0013] Fig. 1 is a diagram showing an example of the configuration of a wireless communication system according to this embodiment. As shown in Fig. 1, the wireless communication system according to 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.

[0014] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. 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 resource blocks. The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signal may be, for example, a PSS or an SSS. The system information is transmitted, for example, via the PBCH 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 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).

[0015] 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 propagation path quality based on the reception results of the reference signals.

[0016] In the following description, unless otherwise specified or unless a different meaning is clear from the context, " / " means "and / or."

[0017] In 3GPP (registered trademark), a power consumption reduction technology called "Low-Power Wake Up Signal and Receiver" is being discussed. 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. A state called Ultra-Deep Sleep is introduced by operating the LR, a simplified circuit that operates with lower power consumption than the Main Radio (MR), which is a circuit used for normal data communication. The LR may have a function that triggers the power OFF of the MR or the power ON of the MR when the LR receives an LP-WUS signal.

[0018] The following is discussed regarding LP-WUS / WUR in 3GPP Rel-19:

[0019] 1) Define a LP-WUS design commonly applicable to both RRC_IDLE / INACTIVE mode and RRC_CONNECTED mode. An OOK (OOK-1 and / or OOK-4) based LP-WUS with an OFDM sequence overlaid on the OOK (on-off-keying) symbols is specified. The LP-WUS design ensures that the same information is delivered for IDLE / INACTIVE operation regardless of the LP-WUS type. The OFDM sequence can carry information. At least duty cycle monitoring of the LP-WUS is supported.

[0020] 2) Define the procedure and configuration of the LP-WUS to indicate paging monitoring triggered by the LP-WUS in RRC_IDLE / INACTIVE mode. This procedure and configuration includes at least one of the configuration, subgrouping, or entry / exit conditions for LP-WUS monitoring. In IDLE / INACTIVE mode, specify the LP-SS with a periodicity of Y ms for the LP-WUR for serving cell synchronization and / or RRM. The LP-SS is based on OOK-1 and / or OOK-4 waveforms with or without overlaid OFDM sequences. Further down-selection methods between those with and without overlaid OFDM sequences will be considered in the future. Note that for LP-WURs that can receive the existing PSS / SSS, the existing PSS / SSS can be used for synchronization and RRM instead of the LP-SS. The value of Y (e.g., 320 ms) will be considered in the future. Further RRM mitigation of UE MR for both serving cell measurements and neighbor cell measurements and UE serving cell RRM measurements offloaded from MR to LP-WUR are defined.

[0021] 3) For RRC_CONNECTED mode, define procedures to allow UE MR PDCCH monitoring triggered by LP-WUS, including LP-WUS monitoring activation and deactivation procedures. In CONNECTED mode, UE MR ultra-deep sleep is not considered, and UE RRM / RLM / BFD / CSI measurements are performed by MR. The target coverage of LP-WUS and LP-SS is the coverage of PUSCH in message 3. Optimization of LP-WUS signal design for idle / inactive mode has priority over optimization for connected mode.

[0022] However, in the conventional standards, the payload structure of the LP-WUS is not specified, and there is a risk that a UE in the RRC CONNECTED mode may not be able to properly perform PDCCH monitoring triggered by the LP-WUS.

[0023] Furthermore, the payload size of the UE-specific LP-WUS indication for triggering PDCCH monitoring is large, the conventional payload configuration is inefficient, and an efficient payload configuration that supports both the UE-specific LP-WUS indication and the UE group common LP-WUS indication has not been specified.

[0024] In this embodiment, the design of the LP-WUS payload, which has not been defined in the past, is defined, and PDCCH monitoring triggered by the LP-WUS can be performed.

[0025] The terminal in this embodiment may be a terminal in the RRC_CONNECTED mode, but is not limited to a terminal in the RRC_CONNECTED mode.

[0026] 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.

[0027] (Configuration of LP-WUS payload size) Conventionally, it has not been specified how the payload size of the LP-WUS is determined in the terminal. According to this embodiment, a method for determining the payload size of the LP-WUS for the terminal 20 is specified.

[0028] The payload size of the LP-WUS may be specified by, for example, a specification (such as the 3GPP standard specification) and may be a fixed value set in the terminal 20 or a predefined value that is not set in the terminal 20. The payload size of the LP-WUS may be notified to the terminal 20 by system information, RRC, MAC CE, or DCI from the network (for example, the base station 10).

[0029] Furthermore, the payload size of the LP-WUS may be determined as at least one or a combination of a fixed value, a predefined value, notification by system information, notification by RRC, notification by MAC CE, or notification by DCI.

[0030] For example, as shown in FIG. 2, if in step S11 the LP-WUS payload size for triggering PDCCH monitoring in RRC_CONNECTED is not set in the terminal 20 or if the payload size "0" (or "null") is set in the terminal 20, in step S12 the terminal 20 may not perform LP-WUS monitoring for triggering PDCCH monitoring in RRC_CONNECTED, or the terminal 20 may perform PDCCH monitoring according to a legacy procedure, or these may be combined.

[0031] (Bitmap-based indication of LP-WUS) According to this embodiment, a bitmap-based indication of LP-WUS is defined to support both a group-wide trigger and a terminal-specific trigger for PDCCH monitoring. A group-wide trigger is to trigger PDCCH monitoring for a group including one or more terminals 20. A terminal-specific trigger is to trigger PDCCH monitoring for a specific terminal 20.

[0032] For example, the payload of the LP-WUS may include one or more fields (bit fields) for indicating one or more terminals 20 that trigger PDCCH monitoring. In other words, the payload of the LP-WUS may be set in one field or may be set across multiple fields. Hereinafter, the term "field" refers to a field included in the payload of the P-WUS for indicating one or more terminals 20 that trigger PDCCH monitoring. The field is an example of information included in the payload of the LP-WUS that triggers PDCCH monitoring for one terminal or a group including one or more terminals.

[0033] A field included in the payload of the LP-WUS may indicate a terminal 20 that triggers PDCCH monitoring and / or a terminal 20 that triggers no PDCCH monitoring in one LP-WUS transmission occasion, i.e., a terminal 20 associated with a field included in the payload of the LP-WUS may be triggered to perform PDCCH monitoring or to not perform PDCCH monitoring.

[0034] For the terminal 20, parameters relating to fields included in the payload of LP-WUS, which are included in at least one of the system information, RRC, MAC CE, or DCI transmitted from the base station 10, may be set.

[0035] The parameters relating to the fields included in the payload of the LP-WUS may indicate the position and / or start position of the field in the payload of the LP-WUS. The position and / or start position of the field in the payload of the LP-WUS may be from "0" to "N Payload_LP_WUS "or"N Payload_LP_WUS May be indexed up to -1. Payload_LP_WUS " is the payload size of LP-WUS. "N Payload_LP_WUS " may be the maximum value of the payload size.

[0036] The same position and / or start position of a field in the payload of the LP-WUS may be set for different terminals 20. For example, in the case of a group-common trigger, multiple terminals 20 included in the group may refer to the same position and / or start position.

[0037] If the bit size of a field included in the LP-WUS payload is a fixed value specified by a specification (e.g., a 3GPP standard specification) or is determined by other parameters, a parameter indicating the bit size of a field included in the LP-WUS payload may not be necessary.

[0038] A parameter related to a field included in the payload of the LP-WUS may indicate the bit size of this field. If the bit size is set by a parameter (for example, if the bit size is notified from the network), the same bit size may be set for multiple terminals 20. For example, one or more of the following options 1 to 4 may be applied to multiple terminals 20.

[0039] Option 1: For example, one or more terminals 20 may have the same cell ID.

[0040] Option 2: For example, the same LP-WUS payload size may be set for one or more terminals 20.

[0041] Option 3: For example, the subgrouping ID for LP-WUS monitoring in RRC_IDLE / INACTIVE mode may be the same.

[0042] Option 4: For example, one or more terminals 20 may monitor the same field to trigger PDCCH monitoring in RRC_CONNECTED mode.

[0043] The terminal 20 may report a terminal capability (UE capability) indicating that it supports at least one of a terminal-specific trigger or a group-common trigger for PDCCH monitoring. This allows, for example, the base station 20 that has received the terminal capability to operate in accordance with the terminal-specific trigger, the group-common trigger, or both of them for PDCCH monitoring supported by the terminal 20.

[0044] A terminal 20 reporting terminal-specific trigger capabilities may not be configured in the same field in the payload of the LP-WUS as other terminals 20 .

[0045] The terminal 20 reporting the group common trigger capability and other terminals 20 having the group common trigger capability may be set in the same field.

[0046] In order for the terminal 20 to report the capability of both terminal-specific triggers and group-common triggers, one or more of the following may be applied.

[0047] Option 1: Whether to apply a terminal-specific trigger or a group-wide trigger to the terminal 20 may be determined based on the implementation of the base station 10.

[0048] Option 2: The terminal 20 may report via UCI / PUCCH / PUSCH whether a terminal-specific trigger or a group-common trigger is selected.

[0049] When the terminal 20 receives the LP-WUS, the terminal 20 may detect the bit field of the trigger for the terminal 20's PDCCH monitoring according to the set parameters.

[0050] For example, as shown in Fig. 3, in the payload of LP-WUS, a field is arranged with a bit size of 1 bit from the start position, and if "1" is detected in the field, PDCCH monitoring may be triggered for the terminal 20. The terminal 20 is triggered for PDCCH monitoring; otherwise, the terminal 20 may not be triggered for PDCCH monitoring.

[0051] If the field [position / start position / bit size] is not set for the terminal 20, the terminal 20 may perform one or more of the following operations Alt.1-Alt.3.

[0052] Alt. 1: The terminal 20 does not monitor the LP-WUS.

[0053] Alt. 2: The terminal 20 monitors the LP-WUS from the first bit of the LP-WUS payload. For example, if a "1" is detected in the first bit, the terminal 20 is triggered to monitor the PDCCH; otherwise, the terminal 20 may not be triggered to monitor the PDCCH.

[0054] Alt. 3: The terminal 20 performs PDCCH monitoring according to the legacy procedure.

[0055] The terminal 20 may assume that the LP-WUS transmits the same content or different content at different LP-WUS transmission opportunities within the LP-WUS monitoring period / time window.

[0056] As in the example of Fig. 4, the same content may be transmitted at different LP-WUS transmission opportunities within an LP-WUS monitoring period / time window. In Fig. 4, for example, the LP-WUS payload size at an LP-WUS transmission opportunity is 8 bits, and one of the 8 bits is assigned to each terminal 20. In the LP-WUS payload, a "1" is set in the field third bit from the left, and two terminals 20 (UE#3 and UE#4) that are part of a terminal group are assigned to this field as a group-wide instruction. In the LP-WUS payload, a "1" is set in the field sixth bit from the left, and one terminal 20 (UE#12) is assigned to this field as a terminal-specific instruction. In this way, according to the LP-WUS payload configuration in this embodiment, PDCCH monitoring can be triggered for UE#3 and UE#4 included in the terminal group, and PDCCH monitoring can be triggered for UE#12 as a terminal-specific instruction.

[0057] If the terminal 20 detects a LP-WUS in one of the LP-WUS transmission opportunities, the terminal 20 may perform one or more of the following actions Alt. 1-Alt. 3.

[0058] Alt. 1: The terminal 20 does not detect a LP-WUS in the remaining LP-WUS transmission opportunities within the LP-WUS monitoring periodicity / time window.

[0059] Alt. 2: If the terminal 20 is triggered, it does not detect a LP-WUS in the remaining LP-WUS transmission opportunities within the LP-WUS monitoring periodicity / time window.

[0060] Alt. 3: If the terminal 20 is not triggered, the terminal 20 may or may not detect a LP-WUS in the remaining LP-WUS transmission opportunities in LP-WUS monitoring.

[0061] If the terminal 20 does not detect a LP-WUS in one LP-WUS transmission opportunity, the terminal 20 may detect a LP-WUS in the remaining LP-WUS transmission opportunities in the LP-WUS monitoring periodicity / time window.

[0062] A time window having a start position and duration may be set for the terminal 20 for LP-WUS monitoring.

[0063] The time windows may be configured periodically.

[0064] The time window may be constituted by one or more of the following Alts.

[0065] Alt. 1: As shown in Figure 5, the [periodicity / start / duration] of the time window may be configured in units of [LP-WUS monitoring cycle / C-DRX periodicity / radio frame / subframe / slot / symbol / ms].

[0066] Alt.2: The start of the time window may be configured by an offset relative to a reference point. The [offset relative to a reference point / periodicity / duration] of the time window may be configured in units of [LP-WUS monitoring cycle / C-DRX periodicity / radio frame / subframe / slot / symbol / ms].

[0067] Alt.2-1: As shown in FIG. 6, the reference point may be the start of the on-period of C-DRX.

[0068] Alternative 2-2: As shown in FIG. 7, the reference point may be the start of a [C-DRX period / radio frame / subframe / slot / symbol / ms] X [radio frames / subframes / slots / symbols / ms] before the start of the [C-DRX period / radio frame / subframe / slot / symbol / ms] at which the C-DRX on period starts.

[0069] The terminal 20 may attempt to detect the LP-WUS starting from any of the following options 1-3 until the end of the time window.

[0070] Option 1: Start of configured time window Option 2: Y [subframe / slot / symbol / ms] after start of configured time window Option 3: Start of [first / configured] LP-WUS monitoring opportunity within time window

[0071] The parameters of the time window [offset relative to reference point / reference point / periodicity / start / duration] and [X / Y] may be indicated by [system information / RRC / MAC CE / DCI].

[0072] (ID-based indication of LP-WUS) According to this embodiment, an ID-based indication of LP-WUS is defined to support both group-wide and terminal-specific triggers for PDCCH monitoring.

[0073] The LP-WUS may indicate one or more triggering IDs. The triggering ID is an ID indicating the terminal 20 that is to perform PDCCH monitoring. When a triggering ID is indicated by the LP-WUS, one or more terminals 20 associated with the triggering ID may be triggered for PDCCH monitoring. The triggering ID is an example of information included in the payload of the LP-WUS that triggers PDCCH monitoring for one terminal or a group including one or more terminals.

[0074] In the example of Figure 8, at an LP-WUS transmission opportunity, PDCCH monitoring is triggered for two terminals 20 (UE#3 and UE#4) included in a terminal group associated with trigger ID#1 as a group-wide instruction, and PDCCH monitoring is triggered for one terminal 20 (UE#8) associated with trigger ID#2 as a terminal-specific instruction.

[0075] The trigger ID may be assigned to an activated terminal 20 capable of LP-WUS triggering for PDCCH monitoring in RRC_CONNECTED mode.

[0076] The trigger ID may be determined by [pre-configuration / system information / RRC / MAC CE / DCI] based on one or more of the following:

[0077] Alt. 1: The trigger ID may be the same as or determined by the subgroup ID for LP-WUS monitoring for terminal 20 in RRC_IDLE / INACTIVE mode.

[0078] Alt. 2: The trigger ID may be the same as the terminal ID (UE ID) or may be determined by the terminal ID.

[0079] Alt. 3: The trigger ID may be the same as the [low power radio ID / LP-WUR ID] or may be determined by the [low power radio ID / LP-WUR ID]. The low power radio ID / LP-WUR ID is an ID that identifies the low power radio (LR (Low power radio) (which may also be called a low power radio module or a low power radio circuit)) included in the terminal.

[0080] Alt. 4: The trigger ID may be assigned by the cell (e.g., base station 10) or the core network.

[0081] Alt. 5: The trigger ID may be the same as the RNTI or may be determined based on the RNTI. For example, the trigger ID may be the same as the C-RNTI assigned to the terminal 20. For example, the trigger ID may be determined by the C-RNTI of the terminal 20. For example, the trigger ID may be C-RNTI mode 2^N, where N is the bit size of the trigger ID.

[0082] A trigger ID may be assigned to one or more terminals 20. The maximum number of terminals 20 to which a trigger ID can be assigned (for example, N trigger_max ) may be defined.

[0083] If a trigger ID is not set in the terminal 20 or if a trigger ID is not notified to the terminal, the terminal 20 may execute one or more of the following Alts.

[0084] Alt. 1: The terminal 20 does not need to monitor the LP-WUS.

[0085] Alt. 2: The terminal 20 may monitor the LP-WUS. If the terminal 20 detects any trigger ID from the LP-WUS, PDCCH monitoring may be triggered for the terminal 20.

[0086] Alt. 3: The terminal 20 may perform PDCCH monitoring according to legacy procedures.

[0087] The terminal 20 may assume that the LP-WUS transmits the same content or different content at different LP-WUS transmission opportunities within the LP-WUS monitoring period / time window.

[0088] In the ID-based indication of the LP-WUS, a time window having a start position and a duration may be set for the terminal 20 for LP-WUS monitoring. The time window may be configured periodically. The time window may be configured by one or more of the following Alts.

[0089] Alt. 1: As shown in Figure 5 above, the [periodicity / start / duration] of the time window may be configured in units of [LP-WUS monitoring cycle / C-DRX periodicity / radio frame / subframe / slot / symbol / ms].

[0090] Alt.2: The start of the time window may be configured by an offset relative to a reference point. The [offset relative to a reference point / periodicity / duration] of the time window may be configured in units of [LP-WUS monitoring cycle / C-DRX periodicity / radio frame / subframe / slot / symbol / ms].

[0091] Alt.2-1: As shown in FIG. 6 above, the reference point may be the start of the on-period of C-DRX.

[0092] Alternative 2-2: As shown in FIG. 7 above, the reference point may be the start of a [C-DRX period / radio frame / subframe / slot / symbol / ms] X [radio frames / subframes / slots / symbols / ms] before the start of the [C-DRX period / radio frame / subframe / slot / symbol / ms] at which the C-DRX on period starts.

[0093] If the terminal 20 detects an LP-WUS in one of the LP-WUS transmission opportunities, the terminal 20 may be triggered for PDCCH monitoring if the trigger ID carried by the LP-WUS is the same as the trigger ID assigned to the terminal 20. The terminal 20 may not detect an LP-WUS in the remaining LP-WUS transmission opportunities within the LP-WUS monitoring period / time window.

[0094] If the trigger ID carried by the LP-WUS is not the same as the trigger ID assigned to the terminal 20, PDCCH monitoring may not be triggered for the terminal 20. The terminal 20 may attempt to detect the LP-WUS in the remaining LP-WUS transmission opportunities in the LP-WUS monitoring period / time window.

[0095] If the terminal 20 does not detect the LP-WUS in one LP-WUS transmission opportunity, the terminal 20 may attempt to detect the LP-WUS in the remaining LP-WUS transmission opportunities in the LP-WUS monitoring periodicity / time window.

[0096] According to this embodiment, the payload configuration of a low power wakeup signal in a wireless communication system, which has not been defined in the past, is defined, and PDCCH monitoring triggered by the low power wakeup signal can be appropriately performed.

[0097] Furthermore, according to this embodiment, it is possible to define an efficient payload structure that supports both UE-specific LP-WUS indication and UE group-common LP-WUS indication for triggering PDCCH monitoring.

[0098] (Device Configuration) Next, a functional configuration example of the base station 10 and the terminal 20 that execute the processes and operations described above will be described. 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.

[0099] <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 names of the functional divisions and functional units may be any as long as they can execute the operations according to this embodiment.

[0100] 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 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 has 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.

[0101] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20. The setting information includes, for example, information related to measurements of low-power signals.

[0102] 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.

[0103] <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 executed, 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.

[0104] 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 wirelessly receives various signals 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 a low-power wake-up signal from the base station 10. The configuration unit 230 stores various configuration information received from the base station 10 by the receiver 220. 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.

[0105] As described in the embodiments, the control unit 240 controls settings, instructions, and notifications related to the low-power wake-up signal. A functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and a functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220.

[0106] (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 a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining software with the single device or the multiple devices.

[0107] 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.

[0108] 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.

[0109] In the following description, the term "apparatus" can be interpreted 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.

[0110] Each function in the base station 10 and the terminal 20 is realized by loading specified 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.

[0111] 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.

[0112] 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 running on 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 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 also be transmitted from a network via a telecommunications line.

[0113] 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 read-only memory (EPROM), an electrically erasable programmable read-only memory (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.

[0114] 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 (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc. The above-mentioned storage medium may be, for example, a database, a server, or other appropriate medium including at least one of the storage device 1002 and the secondary storage device 1003.

[0115] 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, a communication module, etc. 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.

[0116] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0117] 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.

[0118] Furthermore, the base station 10 and the 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, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0119] 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.

[0120] 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.

[0121] 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).

[0122] 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.

[0123] 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.

[0124] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driving burden on the driver, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS, etc.), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. In addition, the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] <Configuration related to this embodiment> (Clause 1) A terminal comprising: a receiver that receives a low power wakeup signal from a base station; and a controller that controls execution of the PDCCH monitoring based on the low power wakeup signal, wherein a payload of the low power wakeup signal includes information for triggering the PDCCH monitoring for one terminal or a group including one or more terminals, and the controller performs the PDCCH monitoring when the terminal is associated with the information. (Clause 2) The terminal according to Clause 1, wherein the information is a field for triggering the PDCCH monitoring, and the controller detects the field included in the payload based on at least one of a position, a start position, or a bit size of the field set in the terminal. (Clause 3) The terminal according to Clause 1, comprising: a transmitter that transmits capability information to the base station, the capability information including at least one of a capability of the terminal to support triggering of PDCCH monitoring for the one terminal or a capability of the terminal to support triggering of PDCCH monitoring for the group. (Clause 4) The terminal according to clause 1, wherein the information is an ID for triggering the PDCCH monitoring, one or more terminals are associated with the ID, and the controller performs the PDCCH monitoring when the terminal is associated with the ID. (Clause 5) The terminal according to clause 1, wherein the controller does not monitor the low power wake-up signal for triggering the PDCCH monitoring when the payload size is not set for the terminal or is set to zero. (Clause 6) A communication method executed by a terminal, comprising: a receiving step of receiving a low power wake-up signal from a base station; and a control step of controlling execution of the PDCCH monitoring based on the low power wake-up signal, wherein a payload of the low power wake-up signal includes information for triggering the PDCCH monitoring for one terminal or a group including one or more terminals, and the control step performs the PDCCH monitoring when the terminal is associated with the information.

[0130] Any of the above configurations defines a payload configuration for a low power wakeup signal in a wireless communication system that has not been defined in the past, and enables PDCCH monitoring triggered by the low power wakeup signal to be performed appropriately. Furthermore, any of the above configurations defines an efficient payload configuration that supports both a UE-specific LP-WUS indication and a UE group-common LP-WUS indication for triggering PDCCH monitoring.

[0131] (Supplementary Notes on the Embodiments) Although the present embodiment has 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; 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 (as long as there is no contradiction). Boundaries between functional units or processing units in functional block diagrams do not necessarily correspond to 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 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, but such devices may be realized by 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, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

[0132] 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) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling and Medium Access Control (MAC) signaling), broadcast information (Master Information Block (MIB) and 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.

[0133] 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-Wide Band), Bluetooth (registered trademark), or other suitable systems, and next-generation systems enhanced 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.

[0134] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described herein may be rearranged 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.

[0135] In this specification, a specific operation described as being performed by the base station 10 may 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).

[0136] 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.

[0137] 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 transmitted to another device.

[0138] In the present disclosure, the determination may be made by a value represented by one bit (0 or 1), by a Boolean value (true or false), or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0139] 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.

[0140] 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.

[0141] 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.

[0142] Note that terms described 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.

[0143] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0144] 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.

[0145] 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.

[0146] 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. A base station may also be referred to by terms such as a macrocell, a small cell, a femtocell, and a picocell.

[0147] 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 partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication services within that coverage.

[0148] 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.

[0149] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," and the like may be used interchangeably.

[0150] 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.

[0151] 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.

[0152] 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 multiple terminals 20 (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). 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.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.

[0157] 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."

[0158] 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.

[0159] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0160] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0161] 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.

[0162] Numerology may be communication parameters that apply to the transmission and / or 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, specific windowing operations performed by the transceiver in the time domain, etc.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] 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.

[0167] 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.

[0168] 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.

[0169] 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.

[0170] 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.

[0171] 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 greater than or equal to 1 ms.

[0172] A resource block (RB) is a resource allocation unit in the time domain and the 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 the numerology, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0173] 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.

[0174] 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, etc.

[0175] 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.

[0176] 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 BWP and numbered within the BWP.

[0177] 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.

[0178] 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."

[0179] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples, and various changes may be made to 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.

[0180] 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.

[0181] 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."

[0182] The aspects / embodiments described in this disclosure may be used alone, in combination, or switched depending on the implementation. Notification of predetermined information (e.g., notification that "X is true") is not limited to explicit notification, but may be implicit (e.g., not notifying the predetermined information).

[0183] 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.

[0184] 10 Base station 110 Transmitter 120 Receiver 130 Setting unit 140 Control unit 20 Terminal 210 Transmitter 220 Receiver 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Drive unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Front wheels 2008 Rear wheels 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication module 2021 Current sensor 2022 Rotation speed sensor 2023 Tire 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 system section 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port (IO port)

Claims

1. A terminal comprising: a receiving unit that receives a low power wake-up signal from a base station; and a control unit that controls the execution of the PDCCH monitoring based on the low power wake-up signal, wherein the payload of the low power wake-up signal includes information that triggers the PDCCH monitoring for one terminal or a group including one or more terminals, and the control unit performs the PDCCH monitoring when the terminal is associated with the information.

2. The terminal according to claim 1, wherein the information is a field for triggering the PDCCH monitoring, and the control unit detects the field included in the payload based on at least one of the position, start position, or bit size of the field set in the terminal.

3. The terminal according to claim 1, further comprising: a transmitter configured to transmit capability information to the base station, the capability information including at least one of a capability of the terminal to support triggering of the PDCCH monitoring for the one terminal or a capability of the terminal to support triggering of the PDCCH monitoring for the group.

4. The terminal according to claim 1, wherein the information is an ID for triggering the PDCCH monitoring, one or more terminals are associated with the ID, and the control unit performs the PDCCH monitoring when the terminal is associated with the ID.

5. The terminal according to claim 1, wherein the control unit does not monitor the low power wake-up signal for triggering the PDCCH monitoring when the payload size is not configured or is configured as zero in the terminal.

6. A communication method executed by a terminal, comprising: a receiving step of receiving a low power wake-up signal from a base station; and a control step of controlling execution of the PDCCH monitoring based on the low power wake-up signal, wherein the payload of the low power wake-up signal includes information that triggers the PDCCH monitoring for one terminal or a group including one or more terminals, and the control step executes the PDCCH monitoring when the terminal is associated with the information.

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