Terminal and communication method

Abstract

This terminal comprises: a control unit that sets, for the terminal in a connected state, monitoring of a low-power wake-up signal; and a reception unit that receives, from a base station, information indicating whether the terminal should perform channel state information (CSI) reporting in a prescribed period. When monitoring of the low-power wake-up signal is set, the control unit executes the CSI reporting in the prescribed period on the basis of 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 signaling (LP (Low Power)-WUS (Wake Up Signal) / LP-WUR (Wake Up Receiver)) technology for reducing power consumption in wireless communication systems.

[0003] Here, in 3GPP Release 19 (R19), a procedure for triggering PDCCH (Physical Downlink Control Channel) monitoring using LP-WUS in RRC (Radio Resource Control)_CONNECTED mode is being considered.

[0004] 3GPP TS 38.300 V18.2.0(2024-06)3GPP TS 38.401 V18.2.0(2024-06)

[0005] However, when the LP-WUS triggers PDCCH (Physical Downlink Control Channel) monitoring in RRC_CONNECTED mode, if it takes a long time for the LP-WUS to trigger the wake-up of the terminal, the initial CSI derived when PDCCH monitoring is activated may be outdated.

[0006] A terminal in this embodiment includes a control unit that sets monitoring of a low-power wake-up signal for the terminal in a connected state, and a receiving unit that receives information from a base station indicating whether the terminal should perform a CSI (Channel State Information) report during a predetermined period. When monitoring of the low-power wake-up signal is set, the control unit performs the CSI report during the predetermined period based on the information.

[0007] According to this embodiment, a terminal configured to monitor a low power wakeup signal is enabled to perform CSI reporting during a specified period.

[0008] 1 is a diagram for explaining a wireless communication system according to an embodiment. FIG. 1 is a diagram illustrating an example of a configuration of a wireless communication system according to an embodiment. FIG. 2 is a diagram illustrating an example of a procedure in which an LP-WUS triggers PDCCH monitoring. FIG. 3 is a diagram illustrating an example of a procedure in which an LP-WUS triggers PDCCH monitoring. FIG. 4 is a diagram illustrating an example of a procedure in which an LP-WUS triggers PDCCH monitoring. FIG. 5 is a diagram illustrating an example of a procedure in which an LP-WUS triggers PDCCH monitoring. FIG. 6 is a diagram illustrating an example of an operation of a CSI report in R15 C-DCRX and R16 DCP. FIG. 7 is a diagram illustrating an example of an operation of a terminal according to a first embodiment. FIG. 8 is a diagram illustrating an example of a period in which a CSI report is supported in the procedure in which an LP-WUS triggers PDCCH monitoring according to the first embodiment. FIG. 9 is a diagram illustrating an example of a period in which a CSI report is supported in the procedure in which an LP-WUS triggers PDCCH monitoring according to the first embodiment. FIG. 1 is a diagram illustrating an example of the operation of a terminal in a modified example of Example 1. FIG. 2 is a diagram illustrating an example of the definition of RRC parameters in a modified example of Example 1. FIG. 3 is a diagram illustrating an example of the configuration of RRC parameters in a modified example of Example 1. FIG. 4 is a diagram illustrating an example of the operation of a terminal in Example 2. FIG. 5 is a diagram illustrating an example of a description of a standard in Example 2. FIG. 6 is a diagram illustrating an example of a description of a standard in Example 2. FIG. 7 is a diagram illustrating an example of a description of a standard in Example 3. FIG. 8 is a diagram illustrating an example of the functional configuration of a base station in this embodiment. FIG. 9 is a diagram illustrating an example of the functional configuration of a terminal in this embodiment. FIG. 10 is a diagram illustrating an example of the hardware configuration of a base station or a terminal in this embodiment. FIG. 11 is a diagram illustrating an example of the configuration of a vehicle in this embodiment.

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

[0010] 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.

[0011] 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.

[0012] 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.).

[0013] 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.

[0014] 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.

[0015] 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).

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

[0017] FIG. 2 is a diagram showing an example of the configuration of a wireless communication system according to this embodiment.

[0018] As shown in FIG. 2, the terminal 20 communicates with a base station 10A provided by the NR system and a base station 10B provided by the NR system (hereinafter, when the base stations 10A and 10B are not distinguished, they may be referred to as "base station 10"). Furthermore, the terminal 20 supports NR-NR dual connectivity, i.e., NR-DC, in which the base station 10A is the master node (hereinafter also referred to as "MN") and the base station 10B is the secondary node (hereinafter also referred to as "SN"). The terminal 20 can simultaneously use multiple component carriers provided by the base station 10A, which is the master node, and the base station 10B, which is the secondary node, to perform simultaneous transmission or reception with the base station 10A, which is the master node, and the base station 10B, which is the secondary node.

[0019] As shown in FIG. 2, the terminal 20 may communicate with a base station 10A provided by the LTE system and a base station 10B provided by the NR system. Furthermore, the terminal 20 may support LTE-NR dual connectivity, i.e., EN-DC, in which the base station 10A is the MN and the base station 10B is the SN. The terminal 20 can simultaneously use multiple component carriers provided by the base station 10A, which is the master node, and the base station 10B, which is the secondary node, to perform simultaneous transmission or reception with the base station 10A, which is the master node, and the base station 10B, which is the secondary node.

[0020] As shown in FIG. 2, the terminal 20 may communicate with a base station 10A provided by the NR system and a base station 10B provided by the LTE system. Furthermore, the terminal 20 may support NR-LTE dual connectivity, i.e., NE-DC (NR-E-UTRA Dual Connectivity), in which the base station 10A is the MN and the base station 10B is the SN. The terminal 20 can simultaneously use multiple component carriers provided by the base station 10A, which is the master node, and the base station 10B, which is the secondary node, to perform simultaneous transmission or reception with the base station 10A, which is the master node, and the base station 10B, which is the secondary node.

[0021] As shown in FIG. 2, the terminal 20 may communicate with a base station 10A provided by the NR system and a base station 10B provided by the NR system. Furthermore, the terminal 20 may support NR-NR dual connectivity, i.e., NR-DC, in which the base station 10A is the MN and the base station 10B is the SN. The terminal 20 can simultaneously use multiple component carriers provided by the base station 10A, which is the master node, and the base station 10B, which is the secondary node, to perform simultaneous transmission or reception with the base station 10A, which is the master node, and the base station 10B, which is the secondary node.

[0022] The terminal 20 in this embodiment may perform communication using one serving cell, or may perform communication using multiple serving cells (for example, CA or DC).

[0023] In the following description, unless otherwise specified or unless a different meaning is clear from the context, " / " means "and / or."

[0024] 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.

[0025] The agreement on the scope of application of LP-WUS / WUR in 3GPP Rel-19 is shown below.

[0026] To specify a LP-WUS design that is commonly applicable to both RRC IDLE / INACTIVE and RRC CONNECTED modes, an OFDM sequence overlaid on OOK symbols (OOK-1 and / or OOK-4) based LP-WUS is specified, supporting at least LP-WUS duty cycle monitoring. The LP-WUS design must ensure that the same information is delivered in IDLE / INACTIVE operation regardless of the LP-WUS type. The OFDM sequence may carry information.

[0027] In case of RRC IDLE / INACTIVE mode: - Specify the LP-WUS procedures and configurations to indicate paging monitoring triggered by the LP-WUS, including at least the configuration, subgrouping and entry / exit conditions for LP-WUS monitoring.

[0028] - For synchronization and / or serving cell RRM, the LP-WUR is assigned an LP-SS with a periodicity of Y [ms]. The LP-SS is based on OOK-1 and / or OOK-4 waveforms, with or without an OFDM sequence overlay. For LP-WURs that can receive existing PSS / SSS, the existing PSS / SSS can be used instead of the LP-SS for synchronization and RRM.

[0029] -Specify, including the necessary conditions, further relaxing the RRM of the terminal 20 MR with measurements of both the serving cell and the neighbor cell and offloading the RRM measurement of the terminal 20 serving cell from the MR to the LP-WUR.

[0030] In RRC CONNECTED mode, it specifies the procedure to enable UE MR PDCCH monitoring triggered by LP-WUS, including the procedure to enable and disable LP-WUS monitoring. In CONNECTED mode, UE MR ultra-deep sleep is not considered, and UE RRM / RLM / BFD / CSI measurements are performed by MR.

[0031] The target coverage of LP-WUS and LP-SS is the PUSCH coverage of message 3. Optimization of LP-WUS signal design for idle / inactive mode takes priority over optimization for connected mode.

[0032] Furthermore, 3GPP Rel-19 is considering a procedure for triggering PDCCH monitoring by LP-WUS in RRC CONNECTED mode. The LP-WUS in this procedure is, for example, an LP-WUS configured in C-DRX (Connected mode Discontinuous Reception). In this procedure, the following options are discussed:

[0033] In option 1, the terminal performs LP-WUS monitoring according to the LP-WUS monitoring configuration before triggering the start of the drx-onDurationTimer, as shown in Figure 3. Option 1 may be applied to the DCP (DCI format 2_6 with CRC scrambled by PS-RNTI) function.

[0034] In option 2, to trigger PDCCH monitoring, the terminal performs LP-WUS monitoring at least outside the legacy C-DRX active time according to the LP-WUS monitoring configuration. In option 2, PDCCH monitoring may be performed regardless of drx-onDurationTimer.

[0035] In Option 2-1, PDCCH monitoring is additionally triggered during LP-WUS monitoring based on the legacy C-DRX cycle and drx-onDurationTimer, as shown in Figure 4. To adopt Option 2-1, it must be configured together with Option 1 to achieve power savings compared to legacy C-DRX.

[0036] In option 2-2, as shown in FIG. 5, PDCCH monitoring is not triggered by the legacy C-DRX cycle and drx-onDurationTimer during LP-WUS monitoring.

[0037] In option 3, LP-WUS monitoring at least within the legacy C-DRX active time is performed according to the LP-WUS monitoring configuration for triggering PDCCH monitoring, as shown in FIG. 6 .

[0038] Combinations of the above options should be considered. Currently, no C-DRX related timers other than drx-onDurationTimer are discussed. The above does not preclude the support of fallback mechanisms that trigger PDCCH monitoring, if any.

[0039] Furthermore, in RRC_CONNECTED mode, the impact of the LP-WUS operation method may be further explained.

[0040] For Option 1, the timing of LP-WUS monitoring is at a configured time offset before the start of drx-onDurationTimer. For Option 1, it may be assumed that the solutions / operations introduced in the DCP mechanism are used as a baseline. It may be assumed that legacy DCP and Option 1 are not configured for the terminal at the same time. LP-WUS related configuration in the RRC CONNECTED state is provided via a dedicated RRC message.

[0041] In 3GPP R15 C-DRX, as shown in Figure 7, during the DRX inactive time, the terminal does not report semi-persistent CSI or periodic CSI. During the DRX active time, the terminal performs measurements on the CSI-RS / CSI-IM resource opportunities of the DRX active time up to the CSI reference resource. The CSI-RS / CSI-IM resource opportunities may be the CSI-RS / CSI-IM resource opportunities of the previous DRX cycle.

[0042] In 3GPP R16 DCP, periodic CSI reporting is enabled for the duration of drx-onDurationTimer included in DRX-Config. As shown in the example of Figure 7, when ps-TransmitPeriodicL1-RSRP is configured, periodic CSI reporting for L1-RSRP of PUCCH is performed. When ps-TransmitOtherPeriodicCSI is configured, periodic CSI reporting other than L1-RSRP of PUCCH is performed.

[0043] In 3GPP R16 DCP, when periodic CSI reporting is performed during the drx-onDurationTimer of DRX-Config, measurement of CSI-RS / CSI-IM resources is enabled during the drx-onDurationTimer of DRX-Config and DRX active time.

[0044] However, for example, as in the case of R16 DCP in Fig. 7, when the LP-WUS triggers PDCCH monitoring in CONNECTED mode, if it takes a long time for the LP-WUS to trigger the wake-up of the terminal, the initial CSI derived when PDCCH monitoring is activated may be outdated. As a result, control based on timely measured or reported CSI that reflects the dynamic nature of the wireless channel (e.g., control of adaptive modulation and coding (AMC), beamforming, and MIMO) cannot be performed, which may result in degradation of communication quality.

[0045] According to this embodiment, a terminal configured for LP-WUS monitoring is enabled to perform CSI reporting at a predetermined time (for example, outside a C-DRX active time). This embodiment will be described below.

[0046] In this embodiment, the LP-WUS (low power wake-up signal) is an example of a low power signal. For example, a legacy (conventional) NR signal / channel is an example of a signal that does not include a low power signal or a signal that is different from a low power signal.

[0047] The terminal in this embodiment may be a terminal in RRC_CONNECTED mode. However, the terminal in this embodiment is not limited to a terminal in RRC_CONNECTED mode. A terminal in RRC_CONNECTED mode may also be referred to as a terminal in a connected state.

[0048] The terminal in this embodiment may be a terminal in which C-DRX is configured. However, the terminal in this embodiment is not limited to a terminal in which C-DRX is configured. C-DRX is configured in the terminal based on C-DRX parameters transmitted from the base station. The terminal operates in accordance with the C-DRX parameters configured by the base station.

[0049] In the following description, the notation [A / B / C / D] means at least one of A, B, C, or D, and means that any combination such as A and B or A, B and C is possible.

[0050] The examples in this embodiment may be implemented independently of each other, or any combination of a plurality of examples may be implemented.

[0051] (First embodiment) If the wake-up of the terminal 20 is not triggered by the LP-WUS for a long time in the CONNECTED mode, the first CSI may be outdated after PDCCH monitoring is triggered.

[0052] According to the first embodiment, the terminal 20 configured for LP-WUS monitoring can be caused to perform CSI reporting for a predetermined period (e.g., outside a C-DRX active time). The predetermined period may be referred to as, for example, a period during which CSI reporting is enabled, a period during which CSI reporting is supported, or a period during which CSI reporting is performed.

[0053] When LP-WUS monitoring is configured for the terminal 20 in the CONNECTED mode, information indicating whether the terminal 20 should report CSI during a predetermined period may be provided to the terminal 20. This information may be a higher layer parameter (e.g., an RRC parameter).

[0054] The information indicating whether the terminal 20 should report CSI during a predetermined period may be information indicating an instruction to cause the terminal 20 to perform CSI reporting during the predetermined period or an instruction not to cause the terminal 20 to perform CSI reporting during the predetermined period.

[0055] The terminal 20 may perform CSI reporting at a predetermined period based on, for example, an RRC parameter in which the predetermined period is set.

[0056] 8 , when LP-WUS monitoring is set in the terminal 20 in the CONNECTED mode (step S101), the terminal 20 receives information (e.g., an RRC parameter) indicating whether the terminal 20 should perform CSI reporting in a predetermined period from the base station 10 (step S102). Based on the received information, the terminal 20 performs (or does not perform) CSI reporting in the predetermined period (step S103).

[0057] The "predetermined period" may be one or a combination of the following Alt. 1-1 to Alt. 1-6.

[0058] Alt.1-1: A period in which C-DRX is not activated or a period in which C-DRX is activated, i.e., outside the C-DRX active time or during the C-DRX active time. Alt.1-2: A period indicated by the drx-onDurationTimer in the DRX-Config and outside the C-DRX active time or during the C-DRX active time. Alt.1-3: A period indicated by the drx-onDurationTimer in the DRX-Config and at least one of the following (1) to (4) during the drx-onDurationTimer period: (1) A period in which an LP-WUS that triggers PDCCH monitoring is not detected. (2) A period in which the terminal 20 detects an LP-WUS and the LP-WUS does not trigger PDCCH monitoring. (3) A period in which the terminal 20 detects an LP-WUS and the LP-WUS triggers PDCCH monitoring. (4) A period of LP-WUS monitoring. Alt.1-4: At least one of the following (1) to (4): (1) (2) A period in which an LP-WUS that triggers PDCCH monitoring is not detected. (3) A period in which the terminal 20 detects an LP-WUS and the LP-WUS does not trigger PDCCH monitoring. (4) A period of LP-WUS monitoring. Alt. 1-5: At least one of the following periods (1) to (4) within the legacy C-DRX active time: (1) A period in which an LP-WUS that triggers PDCCH monitoring is not detected. (2) A period in which the terminal 20 detects an LP-WUS and the LP-WUS does not trigger PDCCH monitoring. (3) A period in which the terminal 20 detects an LP-WUS and the LP-WUS triggers PDCCH monitoring. (4) A period of LP-WUS monitoring. Alt. 1-6: A period in which the drx-onDurationTimer does not start or a period in which the drx-onDurationTimer starts. The drx-onDurationTimer is, for example, a parameter that specifies the period during which the terminal 20 actively performs PDCCH monitoring within the C-DRX cycle.The drx-onDurationTimer defines the consecutive time units (e.g., number of subframes) that the UE monitors the PDCCH for at the start of a DRX cycle.

[0059] Alt.1-2 and Alt.1-3 may be applied to each of the procedures for triggering PDCCH monitoring by LP-WUS shown in Figure 3-5 (Option 1, Option 2-1 or Option 2-2 above) or to a combination of Figure 3 (Option 1) and Figure 4 (Option 2-1).

[0060] For example, the predetermined period in Alt. 1-2, the period indicated by drx-onDurationTimer in DRX-Config and the C-DRX active time outside may be set as shown in Figures 9-11.

[0061] Alt. 1-5 may be applied to the procedure for triggering PDCCH monitoring by LP-WUS shown in Figure 6 (option 3 above).

[0062] For example, the predetermined periods in Alt. 1-5, i.e., (1) a period in which an LP-WUS that triggers PDCCH monitoring is not detected within the legacy C-DRX active time, (2) a period in which the terminal 20 detects an LP-WUS and the LP-WUS does not trigger PDCCH monitoring, (3) a period in which the terminal 20 detects an LP-WUS and the LP-WUS triggers PDCCH monitoring, or (4) a period of LP-WUS monitoring, may be set as shown in FIG. 12.

[0063] The drx-onDurationTimer in Alt.1-2, Alt.1-3, and Alt.1-6 in the first embodiment may be another timer in the legacy DRX procedure or a newly defined timer for LP-WUS operation together with DRX.

[0064] (Modification of Example 1) In a modification of Example 1, an example of properties of CSI to be measured / reported will be described. The properties of CSI include a report type (periodic CSI / aperiodic CSI / semi-persistent CSI) and a type of CSI to be measured / reported (e.g., RI, CQI, RSRP, etc.). The modification of Example 1 may be applied to the above-described Example 1 and to Examples 2 and 3 described below.

[0065] 13 , when LP-WUS monitoring is set in the terminal 20 in the CONNECTED mode (step S111), the terminal 20 receives, from the base station 10, one or more RRC parameters indicating whether the terminal 20 should perform CSI measurement and CSI reporting in a predetermined period (step S112). The terminal 20 performs (or does not perform) CSI reporting in the predetermined period based on the received one or more RRC parameters (step S113).

[0066] The properties of the CSI measured / reported may be one or more combinations of Alt.2-1 to Alt.2-8 below.

[0067] Alt.2-1: Periodic CSI Alt.2-2: Semi-persistent CSI on PUSCH Alt.2-3: Semi-persistent CSI on PUCCH Alt.2-4: Aperiodic CSI Alt.2-5: CSI including L1-RSRP (Layer 1 Reference Signal Received Power) (CSI with L1-RSRP) For example, CSI including L1-RSRP is CSI that includes quality information specified by at least one of "cri-RSRP", "ssb-Index-RSRP", "cri-RSRP-Index", or "ssb-Index-RSRP-Index" set in the RRC parameter reportQuantity.

[0068] Alt. 2-6: CSI with L1-SINR (Layer 1 Signal-to-Interference plus Noise Ratio) For example, CSI with L1-SINR is CSI that includes quality information specified by at least one of "cri-SINR", "ssb-Index-SINR", "cri-SINR-Index", or "ssb-Index-SINR-Index" set in reportQuantity.

[0069] Alt.2-7: CSI including RI (Rank Indicator) (CSI with RI) Alt.2-8: CSI other than CSI with L1-RSRP, CSI with L1-SINR, and CSI with RI For example, CSI in Alt.2-8 is CSI that includes quality information specified by a type / quantity other than at least one of "cri-RSRP", "ssb-Index-RSRP", "cri-RSRP-Index", and "ssb-Index-RSRP-Index" set in reportQuantity.

[0070] The above RRC parameters may be set based on one or more of the following (i)-(iii):

[0071] (i) One or more RRC parameters may be configured corresponding to different CSI properties.

[0072] (ii) If the RRC parameter is [set / exists] or the value of the RRC parameter is set to “true” or “enabled”, the terminal 20 should transmit CSI having the CSI property within a predetermined period.

[0073] (iii) If the RRC parameter is [not set / does not exist] or the value of the RRC parameter is not set to “true” or “enabled”, the terminal 20 should not transmit CSI having the CSI property within a predetermined period.

[0074] For example, in the first embodiment and its modifications, the RRC parameters applied to Alt.1-6, Alt.2-1, and Alt.2-5 or Alt.2-8 may be defined as shown in Fig. 14. In this case, "lpwus-TransmitPeriodicL1-RSRP" and "lpwus-TransmitOtherPeriodicCSI" are set as two RRC parameters. Fig. 15 shows an example of RRC configurations including LPWUS-Config. LPWUS-Config-r19 includes lpwus-TransmitPeriodicL1-RSRP-r19 and lpwus-TransmitOtherPeriodicCSI-r19.

[0075] "lpwus-TransmitPeriodicL1-RSRP" indicates that the terminal 20 periodically transmits an L1-RSRP report when drx-onDurationTimer has not started if LP-WUS monitoring in CONNECTED mode is configured for the terminal 20. If there is no field corresponding to "lpwus-TransmitPeriodicL1-RSRP", the terminal 20 does not periodically transmit an L1-RSRP report when drx-onDurationTimer has not started.

[0076] "lpwus-TransmitOtherPeriodicCSI" indicates that the terminal 20 periodically transmits CSI reports other than L1-RSRP reports when LP-WUS monitoring in CONNECTED mode is configured for the terminal 20 and the drx-onDurationTimer has not started. If there is no field corresponding to "lpwus-TransmitOtherPeriodicCSI", the terminal 20 does not periodically transmit CSI reports other than L1-RSRP reports when the drx-onDurationTimer has not started.

[0077] The terminal 20 in the above-described first embodiment sets LP-WUS monitoring for the terminal 20 in CONNECTED mode (connected state), receives information from the base station 10 indicating whether the terminal 20 should perform CSI reporting in a predetermined period, and, when LP-WUS monitoring is set, performs the CSI reporting in the predetermined period based on the received information.

[0078] As described above, according to the configuration of the first embodiment, it is possible for a terminal for which LP-WUS monitoring is set to execute CSI reporting during a specified predetermined period, and CSI reporting can be performed at an appropriate time during the specified period.

[0079] Second Embodiment In a second embodiment, a CSI resource opportunity for enabling CSI reporting for a predetermined period (e.g., outside a C-DRX active time) is defined.

[0080] According to the second embodiment, as shown in FIG. 16 , when LP-WUS monitoring is configured in the terminal 20 in the CONNECTED mode (step S201) and a predetermined upper layer parameter (for example, an RRC parameter indicating whether the terminal 20 of the first embodiment should report CSI in a predetermined period) is configured in the terminal (step S202), CSI is derived based on a predetermined CSI resource opportunity (step S203).

[0081] The predetermined CSI resource opportunity may be one or more combinations of Alt.1-1 to Alt.1-6 below.

[0082] Alt.1-1: Resource opportunities outside the C-DRX active time or resource opportunities within the C-DRX active time (e.g., resource opportunities when C-DRX is not activated or when it is activated) Alt.1-2: Resource opportunities within the period indicated by the drx-onDurationTimer in the DRX-Config and resource opportunities outside the C-DRX active time or resource opportunities within the C-DRX active time Alt.1-3: Resource opportunities within the period indicated by the drx-onDurationTimer in the DRX-Config and resource opportunities within at least one of the following periods (1) to (4) within the drx-onDurationTimer period: (1) A period in which an LP-WUS that triggers PDCCH monitoring is not detected; (2) A period in which the terminal 20 detects an LP-WUS and the LP-WUS does not trigger PDCCH monitoring; (3) A period in which the terminal 20 detects an LP-WUS and the LP-WUS triggers PDCCH monitoring; (4) A period of LP-WUS monitoring Alt.1-4: Resource opportunities within at least one of the following periods (1)-(4): (1) A period in which an LP-WUS that triggers PDCCH monitoring is not detected; (2) A period in which the terminal 20 detects an LP-WUS, but the LP-WUS does not trigger PDCCH monitoring; (3) A period in which the terminal 20 detects an LP-WUS, but the LP-WUS triggers PDCCH monitoring; (4) A period of LP-WUS monitoring. Alt. 1-5: Resource opportunities within legacy C-DRX active time, and within at least one of the following periods (1)-(4): (1) A period in which an LP-WUS that triggers PDCCH monitoring is not detected; (2) A period in which the terminal 20 detects an LP-WUS, but the LP-WUS does not trigger PDCCH monitoring; (3) A period in which the terminal 20 detects an LP-WUS, but the LP-WUS triggers PDCCH monitoring; (4) A period of LP-WUS monitoring. Alt.1-6: Resource opportunity within a period when the drx-onDurationTimer does not start or a resource opportunity within a period when the drx-onDurationTimer starts. The drx-onDurationTimer in Alt. 1-2, Alt. 1-3, and Alt. 1-6 of Example 2 may be other timers in the legacy DRX procedure or a newly defined timer for LP-WUS operation together with DRX.

[0083] The predetermined CSI resource opportunity may be one or more of Alt.2-1 to Alt.2-5 below.

[0084] Alt.2-1: Resources for channel measurement Alt.2-2: Resources for interference measurement Alt.2-3: CSI-RS (Reference Signal) opportunities (CSI-RS transmission opportunities) Alt.2-4: CSI-IM (Interference Measurement) opportunities Alt.2-5: SSB (Synchronization Signal Block) opportunities In the second embodiment, if there are fewer than N resource opportunities before the CSI reference resource, the terminal 20 may perform the following operation Alt.3-1 or Alt.3-2, where N=1, 2, ..., and N may be set by the RRC / MAC CE / DCI or may be defined as a fixed value by the specifications.

[0085] Alt. 3-1: The terminal 20 does not update the CSI, i.e., the terminal 20 may report previously measured CSI.

[0086] Alt.3-2: The terminal 20 discards or ignores the report, i.e., the terminal 20 does not report the CSI.

[0087] In a specification (for example, a technical specification of the 3GPP standard), the operation of the terminal 20 corresponding to the configuration in which the second embodiment is added to the first embodiment may be specified. For example, the description of Fig. 17 and / or Fig. 18 may be added to the technical specification of the 3GPP standard (TS 38.214 section 5.2.2.5). The terminal 20 may operate based on the specifications of Fig. 17 and Fig. 18.

[0088] An example of the description of the standard in FIG. 17 is that, when LP-WUS monitoring is configured in the terminal 20 and drx-onDurationTimer has not started, if the terminal 20 is configured to report CSI in which the upper layer parameter reportConfigType is set to 'periodic' and the reportQuantity is set to a quantity other than 'cri-RSRP', 'ssb-Index-RSRP', 'cri-RSRP-Index', and 'ssb-Index-RSRP-Index' by the upper layer parameter lpwus-TransmitOtherPeriodicCSI, if the terminal 20 receives at least one CSI-RS transmission opportunity for channel measurement and a CSI-RS and / or CSI-IM opportunity for interference measurement during the time specified by drx-onDurationTimer in DRX-Config outside or during the DRX active time, the terminal 20 Following the procedure described in Section 5.2.1.4 of 38.214, it indicates that even outside the DRX active time, CSI is reported where reportQuantity is not set to 'ssb-Index-SINR' or 'ssb-Index-SINR-Index', and the report is discarded otherwise.

[0089] An example of the description of the standard in Figure 18 shows that when LP-WUS monitoring is configured in the terminal 20 and drx-onDurationTimer has not started, if the terminal 20 is configured by the upper layer parameter lpwus-TransmitPeriodicL1-RSRP to report L1-RSRP with the upper layer parameter reportConfigType set to 'periodic' and the reportQuantity set to 'cri- RSRP' or 'ssb-Index-RSRP-Index', then, in accordance with the procedure described in Section 5.2.1.4 of TS 38.214, if at least one CSI-RS transmission opportunity for channel measurement is received during the time specified by drx-onDurationTimer in DRX-Config or within the DRX active time even outside the active time, reportQuantity is set to 'cri-RSRP' or 'cri- RSRP-Index-Index-Index'.

[0090] Furthermore, for example, the technical specification of the 3GPP standard (TS 38.214 section 5.1.6.1) may include a description that specifies the operation of terminal 20 when DRX is set in terminal 20, as shown in the underlined part of Figure 19.

[0091] Thus, according to the second embodiment, the terminal 20 configured for LP-WUS monitoring can measure the CSI using a CSI resource opportunity for enabling CSI reporting for a predetermined period.

[0092] (Example 3) According to Example 3, when LP-WUS monitoring in CONNECTED mode is configured in the terminal 20 in the CSI-RS for mobility, the terminal 20 may use, for measurement, one or more resource opportunities of Alt. 1-1 to 1-6 in Example 2. For example, a description indicating the operation when LP-WUS monitoring is configured in the terminal 20 may be added to the technical specification of the 3GPP standard (TS 38.214 section 5.1.6.1.3), as shown in the underlined part of Fig. 20 .

[0093] (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.

[0094] <Base Station> Fig. 21 is a diagram showing an example of the functional configuration of the base station 10 in this embodiment. As shown in Fig. 21, 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. 21 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.

[0095] 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.

[0096] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20. The content of the setting information is, for example, information related to measurements of low-power signals.

[0097] 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.

[0098] <Terminal> Fig. 22 is a diagram showing an example of the functional configuration of the terminal 20 in this embodiment. As shown in Fig. 22, 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. 22 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.

[0099] 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.

[0100] 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.

[0101] (Hardware Configuration) The block diagrams (FIGS. 21 and 22) 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.

[0102] 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.

[0103] 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. 23 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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. 21 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. 22 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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).

[0112] 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.

[0113] 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.

[0114] Fig. 24 shows an example configuration of a vehicle 2001. As shown in Fig. 24, 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.

[0115] 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.

[0116] 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).

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] (Configuration related to this embodiment) (Item 1) A terminal comprising: a control unit that sets monitoring of a low power wake-up signal for a terminal that is in a connected state; and a receiving unit that receives information from a base station indicating whether the terminal should perform a CSI (Channel State Information) report in a predetermined period, wherein when monitoring of the low power wake-up signal is set, the control unit performs the CSI report in the predetermined period based on the information.

[0125] (Item 2) The terminal according to item 1, wherein C-DRX (Connected mode Discontinuous Reception) is configured for the terminal, and the predetermined period is outside an active time of the C-DRX.

[0126] (Clause 3) The terminal according to clause 2, wherein the predetermined period is within a period indicated by drx-onDurationTimer and outside a C-DRX active time.

[0127] (Clause 4) The terminal according to clause 1, wherein C-DRX is configured for the terminal, and the predetermined period is at least one of a period during which C-DRX is active and an LP-WUS that triggers PDCCH (Physical Downlink Control Channel) monitoring is not detected, a period after the low power wakeup signal is detected in which the low power wakeup signal does not trigger PDCCH monitoring, a period after the low power wakeup signal is detected in which the low power wakeup signal triggers PDCCH monitoring, or a period during which monitoring of the low power wakeup signal is being performed.

[0128] (Clause 5) The terminal according to clause 2, wherein the control unit measures the CSI in a resource opportunity for the CSI, and the resource opportunity is outside an active time of the C-DRX.

[0129] (Clause 6) A communication method executed by a terminal, comprising: a step of setting monitoring of a low power wake-up signal for the terminal in a connected state; a step of receiving information from a base station indicating whether the terminal should perform a CSI (Channel State Information) report in a predetermined period; and a step of performing the CSI report in the predetermined period based on the information when monitoring of the low power wake-up signal is set.

[0130] Any of the above configurations allows a terminal configured to monitor a wake-up signal for low power to perform CSI reporting at appropriate times. According to Sections 1-4 and 6, a period for performing CSI reporting is specified, and a terminal configured to monitor a wake-up signal for low power can perform CSI reporting during the specified period. According to Section 5, a terminal 20 configured to monitor LP-WUS can measure CSI using a CSI resource opportunity for enabling CSI reporting for a predetermined period.

[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 sent to another device.

[0138] 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).

[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 unit 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port (IO port)

Claims

1. A terminal comprising: a control unit that sets monitoring of a low power wake-up signal for a terminal that is in a connected state; and a receiving unit that receives information from a base station indicating whether the terminal should perform a CSI (Channel State Information) report during a predetermined period, wherein when monitoring of the low power wake-up signal is set, the control unit executes the CSI report during the predetermined period based on the information.

2. The terminal according to claim 1, wherein C-DRX (Connected mode Discontinuous Reception) is configured for the terminal, and the predetermined period is outside an active time of the C-DRX.

3. The terminal according to claim 2, wherein the predetermined period is within the period indicated by drx-onDurationTimer and outside the C-DRX active time.

4. The terminal according to claim 1, wherein C-DRX is configured for the terminal, and the predetermined period is at least one of a period during which a LP-WUS that triggers PDCCH (Physical Downlink Control Channel) monitoring is not detected within an active time of the C-DRX, a period after the detection of the wake-up signal for low power does not trigger PDCCH monitoring, a period after the detection of the wake-up signal for low power triggers PDCCH monitoring, or a period during which monitoring of the wake-up signal for low power is being performed.

5. The terminal according to claim 2, wherein the control unit measures the CSI at a resource opportunity for the CSI, and the resource opportunity is outside an active time of the C-DRX.

6. A communication method executed by a terminal, comprising: a step of setting monitoring of a low power wake-up signal for the terminal in a connected state; a step of receiving information from a base station indicating whether the terminal should perform a CSI (Channel State Information) report during a predetermined period; and a step of performing the CSI report during the predetermined period based on the information when monitoring of the low power wake-up signal is set.

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