Terminal, base station, and communication method

Abstract

The terminal is provided with: a control unit that assumes the base station to execute an intermittent transmission function for enabling or disabling the transmission unit; a communication unit that performs reception from the base station on the basis of the envisaged intermittent transmission function; and a reception unit that receives control information relating to the intermittent transmission function from the base station, the control unit determining whether to assume to receive a physical downlink control channel from the base station during an inactive period of the intermittent transmission function. The physical downlink control channel is used to notify that at least one of cell intermittent transmission and cell intermittent reception is dynamically enabled or disabled.

Description

TECHNICAL FIELD

[0001] The present application relates to a terminal, a base station, and a communication method in a wireless communication system. BACKGROUND

[0002] In NR (New Radio) (also referred to as "5G") that is a successor system of LTE (Long Term Evolution), technologies satisfying a large capacity, a high-speed data transmission rate, a low latency, simultaneous connection of a plurality of terminals, a low cost, power saving, and the like, which are required conditions, are being researched (for example, Non-Patent Literature 1).

[0003] In addition, in Release 18 of 3GPP (registered trademark), in order to realize environmental sustainability, carbon neutrality, SDGs (Sustainable Development Goals), reduction of operational costs, and the like, a method of increasing the importance of power saving in a network (Network energy savings) and performing power saving is researched (for example, Non-Patent Literature 2).

[0004] PRIOR ART DOCUMENTS

[0005] NON-PATENT LITERATURE

[0006] Non-Patent Literature 1: 3GPP TS 38.300 V17.3.0 (2022-12)

[0007] Non-Patent Literature 2: "New WID: Network energy savings for NR", RP-223540, 3GPP TSG RAN Meeting #98-e, December 2022

[0008] Non-Patent Literature 3: 3GPP TS 38.331 V17.3.0 (2022-12) SUMMARY

[0009] PROBLEMS TO BE SOLVED BY THE INVENTION

[0010] In order to realize carbon neutrality and SDGs, the importance of saving power consumption of a base station is increasing, and the introduction of intermittent transmission and reception in the base station is being researched. When intermittent transmission and reception in the base station is dynamically enabled or disabled, it is assumed that physical layer signaling is used. Here, in order to intermittent transmission and reception in the base station, a channel or a signal can be discarded in the non-activated period. Therefore, it is necessary to decide whether to monitor the physical layer signaling in the non-activated period.

[0011] The present application was made in view of the above-described aspect, and aims to dynamically enable or disable intermittent transmission and reception in a base station.

[0012] Means for solving the problem

[0013] According to the disclosed technology, there is provided a terminal having: a control section that assumes that a base station performs an intermittent transmission function that activates or deactivates a transmission unit; a communication section that performs reception from the base station based on the assumed intermittent transmission function; and a reception section that receives control information related to the intermittent transmission function from the base station, the control section deciding whether to assume reception of a physical downlink control channel from the base station during a non-activation period of the intermittent transmission function, the physical downlink control channel being used to notify of dynamic activation or deactivation of at least one of cell intermittent transmission and cell intermittent reception.

[0014] Effects of the invention

[0015] According to the disclosed technology, there is provided a technology that dynamically activates or deactivates an intermittent transmission / reception of a base station. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a diagram for explaining a wireless communication system of an embodiment of the present application.

[0017] Figure 2 is a diagram for explaining CDRX in NR Release 15.

[0018] Figure 3 is a diagram for explaining WUS in NR Release 16.

[0019] Figure 4 is a diagram for explaining intermittent reception of a base station of Example 1 of an embodiment of the present application.

[0020] Figure 5 is a diagram for explaining parameters of Example 1 of an embodiment of the present application.

[0021] Figure 6 is a diagram for explaining intermittent transmission of a base station of Example 5 of an embodiment of the present application.

[0022] Figure 7 is a diagram for explaining parameters of Example 5 of an embodiment of the present application.

[0023] Figure 8 is a flowchart for explaining an example of cell DTX of Example 9 of an embodiment of the present application.

[0024] Figure 9 is a diagram showing an example of a functional structure of a base station of an embodiment of the present application.

[0025] Figure 10is a diagram showing an example of a functional configuration of a terminal of an embodiment of the present application.

[0026] Figure 11 is a diagram showing an example of a hardware configuration of a base station or a terminal of an embodiment of the present application.

[0027] Figure 12 is a diagram showing an example of a configuration of a vehicle of an embodiment of the present application. DETAILED DESCRIPTION

[0028] Hereinafter, an embodiment of the present application will be described with reference to the drawings. Note that the embodiment described below is merely an example, and the embodiment to which the present application is applied is not limited to the embodiment described below.

[0029] In the operation of the wireless communication system of the embodiment of the present application, a conventional technology can be appropriately used. The conventional technology is, for example, the existing NR or LTE, but is not limited to the existing NR or LTE. Further, unless otherwise specified, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and a manner (example: NR) later than LTE-Advanced.

[0030] Further, in the embodiment of the present application described below, the terms 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), PUSCH (Physical Uplink Shared Channel), and the like used in the existing LTE are used. These are for the sake of easy description, and the same signals, functions, and the like can be called by other names. Further, the above terms in the NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, and the like. However, even for the signals for the NR, "NR-" is not necessarily explicitly described.

[0031] Moreover, in the embodiment of the present application, the duplexing method can be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or another method (e.g., a flexible duplexing method, etc.).

[0032] Moreover, in the embodiment of the present application, the "configure" wireless parameters, etc. can be pre-configured with predetermined values, or can be configured with wireless parameters notified from a base station or a terminal.

[0033] (System configuration)

[0034] Figure 1 is a diagram for explaining a wireless communication system in the embodiment of the present application.

[0035] As shown in Figure 1 , the wireless communication system in the embodiment of the present application includes a base station 10 and a terminal 20. In Figure 1 , one base station 10 and one terminal 20 are each shown, but this is only an example, and there can be a plurality of each.

[0036] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a wireless signal are defined in the time domain and the frequency domain, the time domain can be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain can be defined by the number of subcarriers or the number of resource blocks. Moreover, the TTI (Transmission Time Interval) in the time domain can be a slot, and the TTI can be a subframe.

[0037] The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signal is, for example, an NR-PSS and an NR-SSS. The system information is transmitted, for example, by an NR-PBCH, and is also called broadcast information. The synchronization signal and the system information can also be called an SSB (SS / PBCH block). As shown in Figure 1As illustrated, the base station 10 transmits a control signal or data to the terminal 20 through a DL (Downlink), and receives a control signal or data from the terminal 20 through a UL (Uplink). The base station 10 and the terminal 20 each can perform beamforming to perform transmission and reception of signals. In addition, the base station 10 and the terminal 20 each can apply MIMO (Multiple Input Multiple Output) based communication to the DL or the UL. In addition, the base station 10 and the terminal 20 each can perform communication via a secondary cell (SCell) and a primary cell (PCell) based on CA (Carrier Aggregation). Also, the terminal 20 can perform communication via a primary cell of the base station 10 and a primary SCG cell (PSCell) of another base station 10 based on DC (Dual Connectivity).

[0038] The terminal 20 is a communication device having a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, a communication module for M2M (Machine-to-Machine), and the like. As illustrated, Figure 1 As illustrated, the terminal 20 receives a control signal or data from the base station 10 through a DL, and transmits a control signal or data to the base station 10 through a UL, thereby utilizing various communication services provided by a wireless communication system. In addition, the terminal 20 receives various reference signals transmitted from the base station 10, and performs measurement of a propagation path quality based on a reception result of the reference signals. In addition, the terminal 20 can be referred to as a UE, and the base station 10 can be referred to as a gNB.

[0039] Next, a discussion situation of power saving of a base station in NR Release 18 will be described. From the viewpoint of both transmission and reception of the base station, a method for improving network energy saving of the base station and the terminal is being studied. For example, a method in which the base station uses potential support / feedback from the terminal and potential assistance information, and more efficiently implements dynamic and / or semi-static and more fine-grained adaptation of transmission and / or reception by one or more network energy saving techniques in a time domain, a frequency domain, a spatial domain, and a power domain is being studied.

[0040] Next, discontinuous reception (DRX) in a conventional terminal or connected mode DRX (CDRX) will be described.

[0041] Figure 2is a diagram for explaining CDRX in NR Release 15. In the CDRX operation of NR Release 15, the terminal monitors PDCCH in a DRX ON period.

[0042] Figure 3 is a diagram for explaining WUS in NR Release 16. In NR Release 16, a PDCCH-based wake-up signal (WUS: Wake Up Signal) can indicate whether one or more terminals monitor PDCCH in the next DRX ON period.

[0043] DCI format 2_6 with CRC (Cyclic Redundancy Check) scrambled by PS-RNTI (Power Saving-Radio Network Temporary Identifier) is used as the PDCCH-based WUS, also referred to as DCP (DCI with CRC scrambled by PS-RNTI).

[0044] The monitoring opportunity of the WUS is set by an offset from the ON period based on the terminal function. In the case where the WUS indicates "deactivation" (i.e., in the case where the terminal does not perform transmission and reception of data), the terminal can skip monitoring in the ON period and immediately move to the sleep mode.

[0045] Further, for example, in the case where the PDCCH-based WUS is not detected due to detection error or the like, a default terminal operation can be set.

[0046] DCI format 2_6 contains 1-bit wake-up indication information indicating "activation" or "deactivation".

[0047] (Problem points of the related art)

[0048] Next, the problem points of the related art will be described. In order to achieve carbon neutrality and SDGs, the importance of saving base station power consumption is increasing. However, in the related art, there is a problem that a method of saving base station power consumption is not standardized.

[0049] (Summary 1 of the present embodiment)

[0050] Therefore, in the present embodiment, an example of achieving reduction of power consumption of a base station based on a viewpoint in the time domain will be described. Hereinafter, as a specific embodiment, Embodiments 1 to 4 will be described.

[0051] (Embodiment 1)

[0052] In this embodiment, the action and the definition of the concept of the associated concept in the case where the base station performs intermittent reception are explained.

[0053] Figure 4 is a diagram for explaining the intermittent reception of the base station of Embodiment 1 of the present embodiment. The period during which the reception unit of the base station 10 is set to be inactive / active is introduced as a base station intermittent reception (gNB CDRX) function (hereinafter referred to as base station intermittent reception).

[0054] The concept of the intermittent reception of the base station 10 is the same as that of the terminal 20. The reception unit and / or the parameter that is set to be inactive can be each port, panel, beam, or carrier (or cell).

[0055] Figure 5 is a diagram for explaining each parameter of Embodiment 1 of the present embodiment. The base station CDRX can be defined by a plurality of parameters listed below. In addition, the unit of the parameter can be a symbol, a slot, a subframe, a millisecond, or a second, or the like. The unit can be different or the same between the parameters.

[0056] • dnx-onDurationTimer: period at the start of the DRX cycle

[0057] • dnx-SlotOffset: delay before starting the dnx-onDurationTimer

[0058] • dnx-InactivityTimer: period after the uplink reception opportunity in which the terminal 20 performs uplink transmission

[0059] • dnx-LongCycleStartOffset: long DRX cycle (i.e., dnx-LongCycle) and dnx-StartOffset that define when the long DRX cycle and the short DRX cycle start

[0060] • dnx-ShortCycle: short DRX cycle

[0061] • dnx-ShortCycleTimer: period in which the base station 10 follows the short DRX cycle

[0062] • dnx-RetransmissionTimerUL: maximum period until the uplink retransmission grant is received

[0063] • dnx-HARQ-RTT-TimerUL: minimum period until the uplink retransmission grant can be expected

[0064] In a case where the base station discontinuous reception becomes valid, the base station 10 can receive the uplink channel transmitted from the terminal 20 while the drx-onDurationTimer, the drx-InactivityTimer, or the drx-RetransmissionTimerUL is executed.

[0065] In a case where the base station discontinuous reception is valid, the terminal 20 can perform an action of any of the following options.

[0066] < Option 1 >

[0067] The terminal 20 can also perform an action assuming the base station discontinuous reception. Specifically, the terminal 20 recognizes the state of the base station discontinuous reception by RRC, MAC-CE, or DCI. In the case of DCI, the terminal 20 assumes that DCI indicating the state of the base station discontinuous reception is received from the base station 10. In addition, details regarding the indication based on DCI are described later in Embodiment 3.

[0068] The terminal 20 can transmit the uplink channel in the execution of the drx-onDurationTimer, the drx-InactivityTimer, or the drx-RetransmissionTimerUL in a case where the base station discontinuous reception becomes valid.

[0069] < Option 2 >

[0070] The terminal 20 can also ignore the base station discontinuous reception. Specifically, the terminal 20 performs the uplink transmission as scheduled or set by the base station 10 regardless of the state of the base station discontinuous reception.

[0071] In addition, the base station 10 can perform scheduling or setting taking into account the base station discontinuous reception in a case where the base station discontinuous reception is valid, or can perform scheduling or setting regardless of the base station discontinuous reception. In a case where scheduling or setting taking into account the base station discontinuous reception is performed, the function of the base station discontinuous reception is realized even if the terminal 20 ignores the base station discontinuous reception. In contrast, in a case where scheduling or setting not taking into account the base station discontinuous reception is performed, if the terminal 20 ignores the base station discontinuous reception, transmission of a useless signal is performed, and thus power consumption of the terminal 20 is wasted.

[0072] On the other hand, in a case where the base station discontinuous reception is not valid, the base station 10 can also receive the uplink channel transmitted from the terminal 20 regardless of the base station discontinuous reception parameter. That is, the base station 10 can also maintain the state of the on-reception unit and continuously receive the uplink channel from the terminal 20.

[0073] In a case where the base station discontinuous reception is not valid, the terminal 20 can perform an action of any of the following options.

[0074] <Option 1>

[0075] The terminal 20 can perform an action assuming the base station intermittent reception. Specifically, the terminal 20 recognizes the state of the base station intermittent reception by RRC, MAC-CE, or DCI. In the case of DCI, the terminal 20 assumes that the DCI indicating the state of the base station intermittent reception is received from the base station 10. In addition, details regarding the indication based on the DCI are described later in Embodiment 3.

[0076] In the case where the base station intermittent reception is not effective, the terminal 20 performs the uplink transmission as scheduled or set by the base station 10 regardless of the state of the base station intermittent reception.

[0077] <Option 2>

[0078] The terminal 20 can also ignore the base station intermittent reception. Specifically, the terminal 20 performs the uplink transmission as scheduled or set by the base station 10 regardless of the state of the base station intermittent reception.

[0079] Further, the base station 10 can also receive the terminal assistance information in order to decide the aforementioned parameter values defining the wake / sleep period.

[0080] The terminal assistance information can be the period of the terminal traffic. The base station 10 can receive the terminal assistance information at a higher layer. The base station 10 decides the values of the parameters taking into account the terminal assistance information reported by the terminal 20.

[0081] The terminal 20 can also transmit the terminal assistance information such as the period of the terminal traffic to the base station 10.

[0082] According to the present embodiment, the base station 10 intermittent reception can be realized.

[0083] (Embodiment 2)

[0084] In the present embodiment, an example regarding a method of triggering the base station intermittent reception is shown.

[0085] The activation / deactivation of the base station intermittent reception can also be performed by any of the following options.

[0086] <Option 1>

[0087] The base station 10 can activate / deactivate the base station intermittent reception when an RRC parameter indicating the activation / deactivation of the base station intermittent reception is set by the terminal 20 or other network nodes (e.g., a core network or other base stations, etc.).

[0088] <Option 2>

[0089] The base station 10 can also activate / deactivate the base station DRX based on an indication of the activation / deactivation of the base station DRX included in the UCI received from the terminal 20.

[0090] <Option 3>

[0091] The base station 10 can also activate / deactivate the base station DRX based on an indication of the activation / deactivation of the base station DRX included in the UCI received from the terminal 20.

[0092] The UCI including the indication of the activation / deactivation of the base station DRX can be a newly defined UCI type different from the past. In addition, the UCI can also be a UCI type same as the past such as HARQ-ACK, CSI, SR, and the like.

[0093] The terminal 20 can transmit the PUCCH or the PUSCH including the indication of the activation / deactivation of the base station DRX to the base station 10 to activate / deactivate the base station DRX.

[0094] The terminal 20 can receive the DCI indicating the state of the base station DRX from the base station 10 to identify whether the indication based on the UCI is normally decoded by the base station 10, whether the state of the base station DRX is commonly understood between the base station 10 and the terminal 20. In addition, details of the DCI are described later in Embodiment 3.

[0095] <Option 4>

[0096] The base station 10 can activate / deactivate the base station DRX when certain conditions are satisfied. For example, the base station 10 can activate the base station DRX in a case where the base station 10 does not receive the uplink channel from the terminal 20 for a certain time. The certain time can be a symbol, a slot, a subframe, a millisecond, a second, and the like.

[0097] The terminal 20 can also receive the DCI indicating the state of the base station DRX from the base station 10 to obtain the common understanding of the state of the base station DRX between the base station 10 and the terminal 20. In addition, details of the DCI are described later in Embodiment 3.

[0098] <Option 5>

[0099] The base station 10 can activate / deactivate the base station DRX by a combination of the above options.

[0100] In addition, as a procedure of activating / deactivating the base station DRX, the base station 10 can also perform an action of any of the following options.

[0101] <Option 1>

[0102] The base station 10 can immediately make the base station intermittent reception active / inactive when executing any of the aforementioned options of the trigger that becomes the base station intermittent reception active / inactive.

[0103] <Option 2>

[0104] The base station 10 can also accept an indication of the timing of the base station intermittent reception active / inactive as a certain time interval from the reception of the indication or a specified time. The specified unit of the time interval or the time can be a symbol, a slot, a subframe, a millisecond, a second, or the like. That is, the base station 10 can also make the base station intermittent reception active / inactive at a specified time when executing any of the aforementioned options of the trigger that becomes the base station intermittent reception active / inactive.

[0105] <Option 3>

[0106] The base station 10 can make the base station intermittent reception active / inactive based on a newly introduced timer. The timers of the active / inactive can be the same as each other or different from each other. The unit of the timer can be a symbol, a slot, a subframe, a millisecond, a second, or the like. The base station 10 or other network nodes such as the terminal 20 can set the timer by RRC or specify the timer by MAC-CE or UCI / DCI.

[0107] That is, when executing any of the aforementioned options of the trigger that becomes the base station intermittent reception active / inactive, the timer is executed. When the timer expires, the base station 10 can make the base station intermittent reception active / inactive.

[0108] The advantages of the timer are described. Even if the base station intermittent reception is indicated to be active, due to the processing of the terminal 20 or the like, actual uplink transmission from the terminal 20 can sometimes occur with a certain delay after the indication. Even in such a case, by introducing the timer, the base station intermittent reception can be made active after a certain time, and thus the power consumption of the base station 10 can be reduced.

[0109] Furthermore, even if the base station intermittent reception is indicated to be inactive, due to the processing of the terminal 20 or the like, actual uplink transmission from the terminal 20 can sometimes continue to occur for a certain period of time after the indication. Even in such a case, by introducing the timer, the base station intermittent reception can be made inactive after a certain time, and thus the performance of the terminal 20 can be improved.

[0110] According to the present embodiment, it is possible to implement the trigger of the base station intermittent reception, and it is possible to implement the active / inactive action in the triggered case.

[0111] (Embodiment 3)

[0112] In the present embodiment, an example in which the terminal receives an indication on the base station intermittent reception by the DCI is explained.

[0113] In a case where the terminal 20 recognizes the state of the base station intermittent reception and the state is commonly understood in the terminal 20 and the base station 10, a mechanism of indicating the state of the base station intermittent reception from the base station 10 to the terminal 20 needs to be considered. The indication based on the DCI is expected to indicate in time.

[0114] In addition, as an advantage of the common understanding, in a case where the base station intermittent reception is effective, the terminal 20 is able to stop the uplink transmission, and thus the power consumption of the terminal 20 is saved.

[0115] In order to indicate the state of the base station intermittent reception, a new RNTI can be introduced. The new RNTI can be set to gNBCDRX-RNTI (GC-RNTI), for example.

[0116] Further, as to the introduction of the DCI field, any of the following options can be adopted.

[0117] < Option 1 >

[0118] A new DCI field can be introduced to indicate the state of the base station intermittent reception. The bit size of the introduced DCI field can be 1 bit, and "1" indicates the effective state and "0" indicates the ineffective state. Alternatively, it can be the opposite.

[0119] < Option 2 >

[0120] A new DCI field can not be introduced. That is, the state of the base station intermittent reception can be indicated by the existing field. For example, in a case where the corresponding DCI format is scrambled by a new RNTI such as the GC-RNTI, the HPN and the RV fields are all set to "0", the terminal 20 can also recognize that the state of the base station intermittent reception becomes effective.

[0121] Further, for example, in a case where the corresponding DCI format is scrambled by a new RNTI such as the GC-RNTI, the HPN and the RV fields are all set to "0", and the MCS field is all set to "1", the terminal 20 can also recognize that the state of the base station intermittent reception becomes ineffective.

[0122] Further, the corresponding DCI format can be any of the following options.

[0123] < Option 1 >

[0124] It can be a DCI inherent to the terminal 20.

[0125] < Option 1 - 1 >

[0126] The base station 10 can also use a new DCI format different from the past to indicate the state of intermittent reception of the base station.

[0127] <Option 1-2>

[0128] The base station 10 can use the existing DCI formats 0_1, 0_2, 1_1, 1_2, or other DCI formats to indicate the state of intermittent reception of the base station.

[0129] <Option 2>

[0130] For the terminal 20, it can be a group-common DCI.

[0131] <Option 2-1>

[0132] The base station 10 can also use a new DCI format different from the past to indicate the state of intermittent reception of the base station. The aforementioned new DCI field can also be introduced in a new DCI format together with other new DCI fields for the power saving technology of the base station 10. The base station 10 can scramble the new DCI format by the aforementioned new RNTI (GC-RNTI or the like).

[0133] <Option 2-2>

[0134] The base station 10 can also use the past DCI format 2_6 or other group-common DCI format to indicate the state of intermittent reception of the base station.

[0135] Assuming that the DCI format 2_6 is used, the past DCI field of the DCI format can be reinterpreted for indicating the state of intermittent reception of the base station. For example, a "wake-up indication" is used for re-interpretation. It can also be indicated by "1" for the valid state and "0" for the invalid state. It can also be the opposite.

[0136] For the sake of distinction, the base station 10 can also scramble the DCI format 2_6 by the aforementioned new RNTI (GC-RNTI or the like) instead of the PS-RNTI.

[0137] According to the present embodiment, the terminal 20 recognizes the state of intermittent reception of the base station, and thus it is possible to mutually understand in the terminal 20 and the base station 10.

[0138] (Emergency 4)

[0139] In the present embodiment, an example of mutually reporting the capability information of the base station or the terminal related to the intermittent reception of the base station is described.

[0140] The following capability information can be introduced.

[0141] Base station capability information indicating the capability of the base station 10 can be introduced. That is, the base station 10 transmits the base station capability information to the terminal 20 or other network nodes. The terminal 20 or other network nodes that receive the base station capability information can conceive the capability of the base station 10 based on the received base station capability information.

[0142] The base station capability information can also include information indicating whether or not the base station intermittent reception is supported. Furthermore, base station capability information indicating whether or not the DCI indication indicating the state of the base station intermittent reception is supported can also be introduced.

[0143] Furthermore, the following terminal capability information can also be introduced. For example, terminal capability information indicating whether or not the base station intermittent reception is supported can be introduced. Furthermore, terminal capability information indicating whether or not the state recognition of the base station intermittent reception is supported can also be introduced.

[0144] The terminal 20 can also recognize whether or not the base station intermittent reception function is valid or invalid in the case where the terminal has the terminal capability supporting the state recognition of the base station intermittent reception. For example, the terminal 20 can also perform the action of the option 1 shown in Embodiment 1. Furthermore, the terminal 20 can also perform the action of the option 2 shown in Embodiment 1 in the case where the terminal does not have the terminal capability supporting the state recognition of the base station intermittent reception.

[0145] Furthermore, terminal capability information indicating whether or not the DCI indication indicating the state of the base station intermittent reception is supported can also be introduced. Furthermore, terminal capability information indicating whether or not the new terminal-specific / group-common DCI format is supported can also be introduced.

[0146] The dependency relationship between the base station capability information and the terminal capability information can be any of the following options.

[0147] < Option 1 >

[0148] In order to apply the base station intermittent reception, it can also be configured that both the base station capability information and the terminal capability information indicating the support of the base station intermittent reception are reported respectively.

[0149] < Option 2 >

[0150] In order to apply the base station intermittent reception, it can also be configured that only one of the base station capability information and the terminal capability information indicating the support of the base station intermittent reception is reported.

[0151] According to the present embodiment, the capability information of the base station or the terminal related to the base station intermittent reception can be reported to each other.

[0152] The terminal capability in each of the above embodiments can be limited to the case where the terminal 20 is a function-reduced terminal, and can also be applied to the case where the terminal 20 is not a function-reduced terminal.

[0153] (Summary 2 of the Present Embodiment)

[0154] Further, in order to reduce the power consumption in the base station 10, cell DTX / DRX is being studied. For example, alignment of the cell DTX / DRX with the UE-DRX in the RRC connected mode, information exchange between nodes related to the cell DTX / DRX, and the like are being studied.

[0155] The mechanism of making the transceiver unit of the base station 10 active or inactive is important in reducing the power consumption in the base station 10. In order to reduce the power consumption in the base station 10, adaptation of the DL transmission and the UL reception is being studied.

[0156] The cell DTX / DRX is useful for implementing the adaptation of the DL transmission and the UL reception. However, the details of the operation of the cell DTX / DRX are not clear. Therefore, in the following, as a specific embodiment related to the cell DTX / DRX, Embodiment 5 to Embodiment 8 are described.

[0157] (Embodiment 5)

[0158] In Embodiment 5, the definition of the cell DTX / DRX is described. The cell DRX can also be defined as in Embodiment 1 to Embodiment 4 described above. Whether or not to perform the cell DRX is determined by a higher layer parameter, and the period, the start slot, the offset, and the duration can also be set. Further, whether or not to apply the cell DRX can also be determined by a semi-static, dynamic, or flexible network state.

[0159] The cell DTX can also be defined as described later. Whether or not to perform the cell DTX is determined by a higher layer parameter, and the period, the start slot, the offset, and the duration can also be set. Further, whether or not to apply the cell DTX can also be determined by a semi-static, dynamic, or flexible network state.

[0160] <Option 1>

[0161] Figure 6 is a diagram for explaining the intermittent transmission of the base station of Embodiment 5 for explaining an embodiment of the present embodiment. As shown in Figure 6 , the period in which the base station 10 makes the transmission unit of itself inactive or active can also be introduced as the cell DTX.

[0162] The transmission unit and / or the parameter that is made inactive can be per port, per panel, per beam, per carrier, or per cell. The cell DTX can be defined by some or all of the parameters shown in 1) to 6) below. The unit of the parameters can be a symbol, a slot, a subframe, a millisecond, a second, or the like, or other units. The units can be the same or different among the parameters.

[0163] 1) dtx-onDurationTimer: the period from the start of the DTX period.

[0164] 2) dtx-SlotOffset: delay period before starting dtx-onDurationTimer.

[0165] 3) dtx-InactivityTimer: period started after DL transmission opportunity (opportunity in which base station 10 performs DL transmission and terminal 20 receives DL transmission).

[0166] 4) dtx-LongCycleStartOffset: defines long DTX cycle (i.e., dtx-LongCycle) and dtx-StartOffset at which long and short DTX cycles start.

[0167] 5) dtx-ShortCycle: short DTX cycle. May also be optional.

[0168] 6) dtx-ShortCycleTimer: period in which base station 10 performs short DTX cycle. Short DTX is started when DL reception occurs in long DTX. May also be optional.

[0169] Figure 7 is a diagram for explaining each parameter of Embodiment 5 for explaining an embodiment of the present application. As shown in Figure 7 from the start of dtx-LongCycle, dtx-onDurationTimer becomes active time after dtx-SlotOffset. In the case where DL reception occurs in dtx-LongCycle, active time ends after dtx-InactivityTimer elapses from the time at which DL reception occurred, and dtx-ShortCycle is started. When DL reception occurs in dtx-ShortCycleTimer, dtx-ShortCycle continues. In the case where DL reception does not occur in dtx-ShortCycleTimer, dtx-LongCycle is started.

[0170] When cell DTX is activated, base station 10 can also transmit a DL channel or DL signal while dtx-onDurationTimer or dtx-InactivityTimer is in operation. As the operation of terminal 20, terminal 20 can receive a DL channel or DL signal while dtx-onDurationTimer or dtx-InactivityTimer is in operation when cell DTX is activated. Terminal 20 can assume that it receives a DL channel or DL signal when dtx-onDurationTimer or dtx-InactivityTimer is not in operation.

[0171] When the cell DTX is inactivated, the terminal 20 can also receive the DL channel or the DL signal as notified or set to the base station 10.

[0172] The DL channel or the DL signal can be any one of the PDCCH, the PDSCH, the SPS (Semi Persistent Scheduling) -PDSCH, the CSI-RS (Channel State Information - Reference Signal), the PT-RS (Phase Tracking - Reference Signal), and the DM-RS (Demodulation - Reference Signal).

[0173] The UL channel or the UL signal can be any one of the PRACH, the PUCCH, the PUSCH, the CG-PUSCH, the SRS, the PT-RS, and the DM-RS.

[0174] (Embodiment 6)

[0175] In Embodiment 6, the setting of the cell DTX / DRX is described.

[0176] <Option 1>

[0177] The joint setting can be performed. The cell DTX and the cell DRX can be jointly set by the common parameter. When the common parameter (for example, CellDTXDRX-Config) is set, the cell DTX and the DRX can be activated. The terminal 20 can also appropriately perform the action of Embodiment 5.

[0178] The common parameter can include any one or both of the information elements of 1) and 2) shown below.

[0179] 1) Common parameter for DTX and DRX. Some parameters can be common in the DTX and the DRX. For example, the parameter indicating the on-duration timer can be common in the DTX and the DRX. For example, the parameter indicating the period can also be common in the DTX and the DRX.

[0180] 2) Separated parameters in the DTX and the DRX. Some parameters can be set individually in the DTX and the DRX. For example, the parameter indicating the slot offset can be set individually in the DTX and the DRX.

[0181] By Option 1, the overhead of the RRC signaling can be reduced.

[0182] <Option 2>

[0183] Separate setting can also be performed. CellDTX and CellDRX can be separately set by separate parameters. In a case where a parameter for DTX (e.g., CellDTX-Config) is set, CellDTX can be activated. In a case where a parameter for DRX (e.g., CellDRX-Config) is set, CellDRX can be activated. The parameter for DTX can include the parameters described in Embodiment 5. The parameter for DRX can also include the parameters described in Embodiment 1.

[0184] With Option 2, flexibility of setting is increased when CellDTX or CellDRX is included.

[0185] (Embodiment 7)

[0186] In Embodiment 7, activation or deactivation of CellDTX / DRX is described. When CellDTX and CellDRX are jointly set (Option 1 of Embodiment 6), CellDTX and CellDRX can be activated or deactivated as follows.

[0187] <Option 1>

[0188] CellDTX and CellDRX can be activated or deactivated by RRC signaling. In a case where an RRC parameter is set, CellDTX and CellDRX can be activated or deactivated. For example, the RRC parameter can be the common parameter (e.g., CellDTXDRX-Config) in Embodiment 6.

[0189] <Option 2>

[0190] CellDTX and CellDRX can be activated or deactivated by MAC-CE. In a case where a MAC-CE is received by terminal 20, CellDTX and CellDRX can be activated or deactivated.

[0191] <Option 3>

[0192] CellDTX and CellDRX can be activated or deactivated by DCI. Terminal 20 can also be dynamically notified of activation or deactivation of CellDTX and CellDRX by DCI. The notification based on the DCI can be performed as shown in 1) - 4) below.

[0193] 1) The DCI format can be a UE-specific DCI format or a group-common DCI format.

[0194] 2) The DCI format can be an existing format (e.g., DCI format 1_1, 1_2, 2_0) or newly defined (e.g., 1_x, 2_x).

[0195] 3) The RNTI can be an existing RNTI (e.g., C-RNTI, SFI-RNTI) or newly defined.

[0196] 4) The DCI field can be a group of existing fields and / or new fields. For example, in the case of a group of existing fields, as shown in Alt. 1) and Alt. 2) below, some fields can be used to activate or deactivate cell DTX and cell DRX.

[0197] Alt. 1) When scrambled by an existing RNTI such as CS-RNTI, and for example, in the case where HPN is all set to "0", RV is all set to "00", and TDRA is all set to "1", the terminal 20 can also dynamically activate cell DTX and cell DRX. Also, for example, in the case where HPN is all set to "0", RV is all set to "00", MCS is all set to "1", FDRA is all set to "1", and TDRA is all set to "1", the terminal 20 can also dynamically deactivate cell DTX and cell DRX.

[0198] Alt. 2) When scrambled by a new RNTI, and for example, in the case where HPN is all set to "0" and RV is all set to "00", the terminal 20 can also dynamically activate cell DTX and cell DRX. Also, for example, in the case where HPN is all set to "0", RV is all set to "00", MCS is all set to "1", and FDRA is all set to "1", the terminal 20 can also dynamically deactivate cell DTX and cell DRX.

[0199] For example, in the case of a new DCI field, cell DTX and cell DRX can be activated or deactivated by the new DCI field. The new DCI field can also be referred to as a "cell DTX DRX identifier". For example, in the case where the cell DTX DRX identifier is set to "1", the terminal 20 can also dynamically activate cell DTX and cell DRX. Also, for example, in the case where the cell DTX DRX identifier is set to "0", the terminal 20 can also dynamically deactivate cell DTX and cell DRX. In addition, the DCI including the new DCI field can be scrambled by any one of the existing RNTI and the new RNTI.

[0200] Further, in the case where the cell DTX and the cell DRX are set separately (Option 2 of Embodiment 6), the cell DTX and the cell DRX can also be activated or deactivated as follows.

[0201] < Option 1 >

[0202] The cell DTX or the cell DRX can be activated or deactivated by RRC signaling. In the case where an RRC parameter is set, the cell DTX or the cell DRX can be activated or deactivated. For example, the RRC parameter can be a separate parameter (e.g., CellDTX-Config, CellDRX-Config) in Embodiment 6.

[0203] < Option 2 >

[0204] The cell DTX or the cell DRX can be activated or deactivated by MAC-CE. In the case where the terminal 20 receives the MAC-CE, the cell DTX or the cell DRX can be activated or deactivated.

[0205] < Option 3 >

[0206] The terminal 20 can also be dynamically notified of the activation or deactivation of the cell DTX or the cell DRX by DCI. The notification based on the DCI can be performed as shown in 1) - 4) below.

[0207] 1) The DCI format can be a UE-specific DCI format or a group-common DCI format.

[0208] 2) The DCI format can be an existing format (e.g., DCI format 1_1, 1_2, 2_0) or a newly defined format (e.g., 1_x, 2_x).

[0209] 3) The RNTI can be an existing RNTI (e.g., C-RNTI, SFI-RNTI) or a newly defined RNTI.

[0210] 4) The DCI field can be a group of existing fields and / or new fields. For example, a different group of DCI fields can be used for the activation or deactivation of any one of the cell DTX and the cell DRX, respectively. For example, in the case of a group of existing fields, as shown in Alt. 1) and Alt. 2) below, some fields can be used for the activation or deactivation of the cell DTX and the cell DRX.

[0211] Alt. 1) In the case where scrambling is performed by an existing RNTI such as CS-RNTI, and, for example, in the case where HPN is all set to "0", RV is all set to "00", and PRI is all set to "1", the terminal 20 can dynamically activate cell DTX. Further, for example, in the case where HPN is all set to "0", RV is all set to "00", MCS is all set to "1", FDRA is all set to "1", and PRI is all set to "1", the terminal 20 can also dynamically deactivate cell DTX. Further, for example, in the case where HPN is all set to "0", RV is all set to "00", and TDRA is all set to "1", the terminal 20 can also dynamically activate cell DRX. Further, for example, in the case where HPN is all set to "0", RV is all set to "00", MCS is all set to "1", FDRA is all set to "1", and TDRA is all set to "1", the terminal 20 can also dynamically deactivate cell DRX.

[0212] In addition, the PRI and TDRA fields can also be additionally used for indicating which one of CG-PUSCH / SPS-PDSCH and cell DTX / cell DRX is the target for the activated or deactivated DCI.

[0213] In addition, the same field as the field used as described above (for example, TDRA) for PRI and TDRA can also be used for indicating which one of CG-PUSCH / SPS-PDSCH and cell DTX / cell DRX is the target. When different DCI formats are used, it can be notified by the DCI format whether cell DTX or cell DRX is the target. For example, DCI format 0_0 can activate or deactivate cell DRX, and DCI format 1_0 can activate or deactivate cell DTX.

[0214] Alt.2) When scrambled by a new RNTI, for example, in a case where HPN is all set to "0", RV is all set to "00", and PRI is all set to "1", the terminal 20 can dynamically activate the cell DTX. For example, in a case where HPN is all set to "0", RV is all set to "00", MCS is all set to "1", FDRA is all set to "1", and PRI is all set to "1", the terminal 20 can also dynamically deactivate the cell DTX. For example, in a case where HPN is all set to "0" and RV is all set to "00", the terminal 20 can also dynamically activate the cell DRX. For example, in a case where HPN is all set to "0", RV is all set to "00", MCS is all set to "1", and FDRA is all set to "1", the terminal 20 can also dynamically deactivate the cell DRX.

[0215] In addition, although, for example, PRI is used as described above, a field added for indicating which one of the cell DTX and the cell DRX is not used. When a different DCI format is used, whether the cell DTX or the cell DRX is targeted can be notified by the DCI format. For example, DCI format 0_0 can activate or deactivate the cell DRX, and DCI format 1_0 can activate or deactivate the cell DTX.

[0216] For example, in a case of a new DCI field, the cell DTX or the cell DRX can be activated or deactivated by the new DCI field. The new DCI field can also be referred to as a "cell DTX identifier" or a "cell DRX identifier".

[0217] When the cell DTX and the cell DRX are separately notified by separate fields, for example, in a case where the cell DTX identifier is set to "1", the terminal 20 can also dynamically activate the cell DTX. Further, for example, in a case where the cell DTX identifier is set to "0", the terminal 20 can also dynamically deactivate the cell DTX. For example, in a case where the cell DRX identifier is set to "1", the terminal 20 can also dynamically activate the cell DRX. Further, for example, in a case where the cell DRX identifier is set to "0", the terminal 20 can also dynamically deactivate the cell DRX.

[0218] Further, the new DCI field can also be referred to as "Cell DTX DRX identifier". When the cell DTX and the cell DRX are jointly notified by the common field, for example, in the case where the cell DTX DRX identifier is set to "01", the terminal 20 can dynamically activate the cell DTX and can also dynamically deactivate the cell DRX. For example, in the case where the cell DTX DRX identifier is set to "10", the terminal 20 can dynamically activate the cell DRX and can also dynamically deactivate the cell DTX. For example, in the case where the cell DTX DRX identifier is set to "11", the terminal 20 can also dynamically activate the cell DTX and the cell DRX. For example, in the case where the cell DTX DRX identifier is set to "00", the terminal 20 can also dynamically activate the cell DTX and the cell DRX. The bit mapping of the above-described cell DTX and cell DRX can be reversed.

[0219] In addition, the DCI including the new DCI field can be scrambled by any one of the existing RNTI and the new RNTI.

[0220] The timing of the activation or deactivation of the cell DTX or the cell DRX notified by the MAC-CE or the DCI described above can be 1) or 2) shown below.

[0221] 1) The terminal 20 can immediately activate or deactivate. When the activation or deactivation of the cell DTX or the cell DRX is notified by the MAC-CE or the DCI, the cell DTX or the cell DRX can be activated or deactivated immediately.

[0222] 2) The terminal 20 can also activate or deactivate at the notified time. When to activate or deactivate the cell DTX or the cell DRX, an interval from the time when the activation or deactivation is notified or a certain time can also be notified via the RRC signaling, the MAC-CE, or the DCI. The unit of time can be a symbol, a slot, a subframe, a millisecond, a second, or the like. When the activation or deactivation of the cell DTX or the cell DRX is notified by the MAC-CE or the DCI, the cell DTX or the cell DRX can be activated or deactivated at the time notified in advance.

[0223] (Embodiment 8)

[0224] In Embodiment 8, the associated action of the cell DTX / DRX and the UE DRX is described. In the case where the time positions of the cell DTX and the UE DRX are not aligned, the terminal 20 can wake up in order to receive the DL channel or the DL signal when the DL transmission is not performed for the cell DTX.

[0225] Therefore, the terminal 20 can act as Option 1 to Option 5 as shown below.

[0226] < Option 1 >

[0227] In a case where the UE DRX (e.g., DRX-Config) is set, the terminal 20 can not assume that the cell DTX is set.

[0228] < Option 2 >

[0229] In a case where the cell DTX is set, the terminal 20 can not assume that the UE DRX (e.g., DRX-Config) is set. In addition, the parameter of the cell DTX can be the parameter described in Embodiment 6.

[0230] < Option 3 >

[0231] In a case where the UE DRX (e.g., DRX-Config) is set, the terminal 20 can not assume that the cell DTX which is not aligned in time with the UE DRX is set. In a case where the cell DTX and the UE DRX are aligned in time, the cell DTX and the UE DRX can be set jointly.

[0232] < Option 4 >

[0233] In a case where the cell DTX is set, the terminal 20 can not assume that the UE DRX (e.g., DRX-Config) which is not aligned in time with the cell DTX is set. In a case where the cell DTX and the UE DRX are aligned in time, the cell DTX and the UE DRX can be set jointly.

[0234] < Option 5 >

[0235] The cell DTX and the UE DRX can be set to the terminal 20 regardless of whether the cell DTX and the UE DRX are aligned in time or not. In addition, in a case where the cell DTX is set in addition to the UE DRX, the parameter of the cell DTX can be prioritized. The terminal 20 can ignore the parameter of the UE DRX. The terminal 20 can act as in Embodiment 5. In addition, in a case where the cell DTX is set in addition to the UE DRX, the parameters of both can be applied. The terminal 20 can wake up at the activation time of both the cell DTX and the cell DRX.

[0236] As for the above-mentioned "the cell DTX and the UE DRX are aligned in time", it can be defined as Option 1 or Option 2 as shown below.

[0237] <Option 1>

[0238] In the case where the long cycle is the same in the cell DTX and the UE DRX, it can also be defined that the time positions of the cell DTX and the UE DRX are consistent.

[0239] <Option 1-1>

[0240] Further, in the case where the long cycle is the same in the cell DTX and the UE DRX, it can also be defined that the time positions of the cell DTX and the UE DRX are consistent regardless of the active time within the long cycle. That is, in the case where the long cycle (e.g., dtx-LongCycle) of the cell DTX and the long cycle (e.g., dtx-LongCycle) of the UE DRX are the same, it can be defined that the time positions are consistent.

[0241] <Option 1-2>

[0242] In the case where the long cycle is the same in the cell DTX and the UE DRX, it can also be defined that the time positions of the cell DTX and the UE DRX are consistent depending on the active time within the long cycle. In the case where the on duration timer, the slot offset (e.g., dtx-LongCycle, dtx-LongCycle, dtx-onDurationTimer, dtx-onDurationTimer, dtx-SlotOffset, dtx-SlotOffset) in the long cycle are the same in the cell DTX and the UE DRX, it can be defined that the time positions of the cell DTX and the UE DRX are consistent. Also, it can be additionally considered to determine whether other parameters (e.g., dtx-InactivityTimer, dtx-InactivityTimer, etc.) satisfy the definition.

[0243] <Option 2>

[0244] In addition to the long cycle, in the case where the short cycle is the same in the cell DTX and the UE DRX, it can also be defined that the time positions of the cell DTX and the UE DRX are consistent. Option 2 can also be applied in the case where the conditions of Option 1-1 or Option 1-2 are satisfied.

[0245] <Option 2-1>

[0246] Further, in the case where the short cycle is the same in the cell DTX and the UE DRX, it can also be defined that the time positions of the cell DTX and the UE DRX coincide regardless of the on-duration time within the short cycle. That is, in the case where the short cycle (e.g., dtx-ShortCycle) of the cell DTX and the short cycle (e.g., drx-ShortCycle) of the UE DRX are the same, it can be defined that the time positions coincide.

[0247] <Option 2-2>

[0248] In the case where the short cycle is the same in the cell DTX and the UE DRX, it can also be defined that the time positions of the cell DTX and the UE DRX coincide depending on the on-duration time within the short cycle. The short cycle timers, the short cycle (e.g., dtx-ShortCycleTimer, drx-ShortCycleTimer, dtx-ShortCycle, drx-ShortCycle) in the case where the cell DTX and the UE DRX are the same can be defined that the time positions of the cell DTX and the UE DRX coincide.

[0249] (Summary 3 of the present embodiment)

[0250] It is assumed that the UE does not transmit and receive some channels or signals during the non-activation period of the cell DTX / DRX. That is, the channels or signals are dropped due to the cell DTX / DRX. When the intermittent transmission and reception in the base station is dynamically activated or deactivated, it is assumed that physical layer signaling is used. Here, in order to the intermittent transmission and reception in the base station, the channels or signals can be dropped during the non-activation period.

[0251] Therefore, as explained in Embodiment 9 below, it can also be determined whether or not to monitor or receive the PDCCH for notifying that the cell DTX / DRX is dynamically activated or deactivated during the non-activation period of the cell DTX / DRX. Hereinafter, the UE monitors or receives the PDCCH from the base station 10 can be replaced with the base station 10 transmits the PDCCH to the UE.

[0252] (Embodiment 9)

[0253] <Option 1>

[0254] The UE can also assume that the PDCCH for notifying that the cell DTX / DRX is dynamically activated or deactivated is monitored or received during the non-activation period of the cell DTX.

[0255] The UE can assume that the PDCCH for notifying that the cell DTX / DRX is dynamically activated or deactivated is monitored or received during the non-activation period of the cell DTX.

[0256] Whether or not a certain PDCCH notifies of dynamically activating or deactivating cell DTX / DRX can be decided as shown in 1) or 2) below.

[0257] 1) It can be decided by RNTI. For example, when a PDCCH is scrambled by a new RNTI facing notification of dynamically activating or deactivating cell DTX / DRX, the UE can decide that the PDCCH notifies of dynamically activating or deactivating cell DTX / DRX.

[0258] 2) It can also be decided according to search space. For example, in a case where an RRC parameter SearchSpaceType (refer to Non-Patent Literature 3) is set to a new search space dci-format2-X facing monitoring of a PDCCH for notifying of dynamically activating or deactivating cell DTX / DRX, the UE can decide that the PDCCH notifies of dynamically activating or deactivating cell DTX / DRX.

[0259] <Option 2>

[0260] The UE can also not assume monitoring or reception of a PDCCH for notifying of dynamically activating or deactivating cell DTX / DRX in the non-activation period of cell DTX.

[0261] The UE can or can not assume monitoring or reception of a PDCCH other than a PDCCH for notifying of dynamically activating or deactivating cell DTX / DRX in the non-activation period of cell DTX.

[0262] Whether or not a certain PDCCH notifies of dynamically activating or deactivating cell DTX / DRX can be decided as shown in 1) or 2) below.

[0263] 1) It can be decided by RNTI. For example, when a PDCCH is scrambled by a new RNTI facing notification of dynamically activating or deactivating cell DTX / DRX, the UE can decide that the PDCCH notifies of dynamically activating or deactivating cell DTX / DRX.

[0264] 2) It can also be decided according to search space. For example, in a case where an RRC parameter SearchSpaceType (refer to Non-Patent Literature 3) is set to a new search space dci-format2-X facing monitoring of a PDCCH for notifying of dynamically activating or deactivating cell DTX / DRX, the UE can decide that the PDCCH notifies of dynamically activating or deactivating cell DTX / DRX.

[0265] <Option 3>

[0266] Figure 8is a flowchart for explaining an example of the cell DTX of Embodiment 9. In step Sll, the UE sets whether or not the UE envisages monitoring or receiving the PDCCH for notifying of dynamically activating or deactivating the cell DTX / DRX in the inactive period of the cell DTX by a higher layer parameter. In the next step S12, it is determined whether or not the UE envisages monitoring or receiving the PDCCH in the inactive period of the cell DTX. In the case where the UE envisages monitoring or receiving the PDCCH in the inactive period of the cell DTX (YES of S12), it proceeds to step S13, and in the case where the UE does not envisage monitoring or receiving the PDCCH in the inactive period of the cell DTX (NO of S12), it proceeds to step S14.

[0267] In step S13, the UE monitors or receives the PDCCH in the inactive period of the cell DTX. On the other hand, in step S14, the UE does not monitor or receive the PDCCH in the inactive period of the cell DTX.

[0268] The UE capability of whether or not the UE envisages receiving the PDCCH for notifying of dynamically activating or deactivating the cell DTX / DRX in the inactive period of the cell DTX can or can not be defined.

[0269] In the case where the UE capability is reported to the base station 10, the base station 10 can also set whether or not the UE envisages receiving the PDCCH for notifying of dynamically activating or deactivating the cell DTX / DRX in the inactive period of the cell DTX.

[0270] In the case where the base station 10 is set to allow the UE to receive the PDCCH for notifying of dynamically activating or deactivating the cell DTX / DRX in the inactive period of the cell DTX, the UE envisages receiving the PDCCH for notifying of dynamically activating or deactivating the cell DTX / DRX in the inactive period of the cell DTX.

[0271] In the case where the base station 10 is set to not allow the UE to receive the PDCCH for notifying of dynamically activating or deactivating the cell DTX / DRX in the inactive period of the cell DTX, the UE does not envisage receiving the PDCCH for notifying of dynamically activating or deactivating the cell DTX / DRX in the inactive period of the cell DTX.

[0272] In the case where the UE capability is not reported to the base station 10, or in the case where the UE capability is not defined, the UE can also act as shown in 1) or 2) below.

[0273] 1) The UE envisions receiving a PDCCH during the inactive period of cell DTX to notify the dynamic activation or deactivation of cell DTX / DRX.

[0274] 2) The UE does not expect to receive a PDCCH for dynamically enabling or deactivating cell DTX / DRX during the inactive period of cell DTX.

[0275] When multiple cell DTX settings are supported, whether the UE intends to receive the PDCCH used to notify the switching of dynamically enabling or deactivating cell DTX / DRX during the inactive period of cell DTX can be set by a common parameter or by separate parameters according to the settings of each cell DTX.

[0276] Furthermore, the choice of which of the above embodiments to use can be set through higher-layer parameters, reported as a UE capability from terminal 20 to base station 10, specified through a standard, or reported as a UE capability from terminal 20 to base station 10 and set through higher-layer parameters. The base station-oriented WUS (Wake-up signal) can be used for cell DRX and cell DTX, in addition to cell DRX.

[0277] Additionally, UE capabilities indicating whether cell DTX and cell DRX are supported can be defined. UE capabilities indicating whether dynamic activation or deactivation of cell DTX and cell DRX is supported can also be defined. UE capabilities indicating whether cell DTX and cell DRX accompanying UE DRX or CDRX can also be defined.

[0278] Additionally, cell DTX / DRX can be replaced with cell DTX and / or cell DRX. Activation / deactivation can be replaced with activation and / or deactivation.

[0279] According to the above embodiments, a technique is provided to dynamically enable or disable the intermittent transmission and reception of a base station.

[0280] (Device structure)

[0281] Next, an example of the functional structure of the base station 10 and terminal 20 performing the processes and actions described above will be explained. The base station 10 and terminal 20 include the functions to perform the above embodiments. However, the base station 10 and terminal 20 may each only have the functions proposed in any of the embodiments.

[0282] <Base Station 10>

[0283] Figure 9 This is a diagram illustrating an example of the functional structure of a base station. (For example...) Figure 9As shown, the base station 10 has a transmission section 110, a reception section 120, a setting section 130, and a control section 140. Figure 9 The functional structure shown is merely an example. The functional division and the names of the functional sections can be arbitrary as long as the actions involved in the embodiments of the present application can be executed. The transmission section 110 and the reception section 120 can be referred to as a communication section.

[0284] The transmission section 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal in a wireless manner. The reception section 120 includes a function of receiving various signals transmitted from the terminal 20 and extracting, for example, higher layer information from the received signals. Further, the transmission section 110 has a function of transmitting an NR-PSS, an NR-SSS, an NR-PBCH, a DL / UL control signal, DL data, and the like to the terminal 20. Further, the transmission section 110 transmits the setting information and the like explained in the embodiments.

[0285] The setting section 130 stores the setting information set in advance and various setting information transmitted to the terminal 20 in a storage device and reads out from the storage device as necessary. The control section 140 performs, for example, the control of the entire base station 10 including the control relating to the signal transmission and reception and the like. Alternatively, the functional section relating to the signal transmission in the control section 140 can be included in the transmission section 110 and the functional section relating to the signal reception in the control section 140 can be included in the reception section 120. Further, the transmission section 110 and the reception section 120 can be referred to as a transmitter and a receiver, respectively.

[0286] <terminal 20>

[0287] Figure 10 is a diagram showing an example of the functional structure of the terminal. As shown, the terminal 20 has a transmission section 210, a reception section 220, a setting section 230, and a control section 240. Figure 10 Figure 10 The functional structure shown is merely an example. The functional division and the names of the functional sections can be arbitrary as long as the actions involved in the embodiments of the present application can be executed. The transmission section 210 and the reception section 220 can be referred to as a communication section.

[0288] The transmission section 210 generates a transmission signal from transmission data and transmits the transmission signal in a wireless manner. The reception section 220 receives various signals in a wireless manner and extracts higher layer signals from the received physical layer signals. Further, the transmission section 210 transmits a HARQ-ACK and the reception section 220 receives the setting information and the like explained in the embodiments.

[0289] ​The setting section 230 stores various setting information received by the receiving section 220 from the base station 10 in a storage device, and reads out from the storage device as necessary. Further, the setting section 230 also stores setting information set in advance. The control section 240 performs control of the entire terminal 20 including control relating to signal transmission and reception, and the like. In addition, the function section relating to signal transmission in the control section 240 can be included in the transmission section 210, and the function section relating to signal reception in the control section 240 can be included in the receiving section 220. Further, the transmission section 210 and the receiving section 220 can be respectively referred to as a transmitter and a receiver.

[0290] The terminal or the base station of the present embodiment can be configured as a terminal or a base station shown in each of the following items. In addition, the following communication method can be implemented.

[0291] <Structure Related to the Present Embodiment>

[0292] (1st item)

[0293] A terminal including:

[0294] a control section that assumes, by the base station, an intermittent transmission function of activating or deactivating a transmission unit;

[0295] a communication section that performs reception from the base station based on the assumed intermittent transmission function; and

[0296] a receiving section that receives control information relating to the intermittent transmission function from the base station,

[0297] the control section decides whether to assume reception of a physical downlink control channel from the base station during a non-activation period of the intermittent transmission function, the physical downlink control channel being used to notify of dynamic activation or deactivation of at least one of cell intermittent transmission and cell intermittent reception.

[0298] (2nd item)

[0299] The terminal according to the 1st item, in which the control section assumes reception of the physical downlink channel from the base station during the non-activation period of the intermittent transmission function.

[0300] (3rd item)

[0301] The terminal according to the 1st item, in which the control section does not assume reception of the physical downlink channel from the base station during the non-activation period of the intermittent transmission function.

[0302] (4th item)

[0303] The terminal according to item 1, wherein the control section does not assume reception of the physical downlink channel from the base station during the non-activation period of the intermittent transmission function.

[0304] Item 5

[0305] A base station having:

[0306] a control section that executes an intermittent transmission function that activates or deactivates a transmission unit;

[0307] a communication section that, based on the intermittent transmission function, performs transmission to a terminal; and

[0308] a transmission section that transmits control information related to the intermittent transmission function to the terminal,

[0309] the control section decides whether or not to transmit a physical downlink control channel to the terminal during a non-activation period of the intermittent transmission function, the physical downlink control channel being used to notify of dynamic activation or deactivation of at least one of cell intermittent transmission and cell intermittent reception.

[0310] Item 6

[0311] A communication method performed by a terminal, comprising:

[0312] assuming that a base station executes an intermittent transmission function that activates or deactivates a transmission unit;

[0313] based on the assumed intermittent transmission function, performing reception from the base station;

[0314] receiving control information related to the intermittent transmission function from the base station; and

[0315] deciding whether or not to assume reception of a physical downlink control channel from the base station during a non-activation period of the intermittent transmission function, the physical downlink control channel being used to notify of dynamic activation or deactivation of at least one of cell intermittent transmission and cell intermittent reception.

[0316] According to any one of the above-described structures, a technology of dynamically activating or deactivating intermittent transmission and reception of a base station is provided. According to items 2 to 4, it is possible to decide whether or not to receive a PDCCH that dynamically activates or deactivates intermittent transmission and reception of a base station during a non-activation period of intermittent transmission.

[0317] (Hardware structure)

[0318] The block diagram used in the description of the above-described embodiments Figure 9 and Figure 10) shows blocks in units of functions. These functional blocks (structural units) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block can be realized using one device that is physically or logically integrated, or two or more devices that are physically or logically separated can be connected directly or indirectly (for example, using wire, wireless, or the like) and realized using the plurality of devices. Each functional block can also be realized in combination with software in the one device or the plurality of devices described above.

[0319] The function has judgment, decision, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, and the like, but is not limited to these. For example, a functional block (structural unit) that functions as a transmission function is referred to as a transmitting unit or a transmitter. In any case, as described above, the method of realization is not particularly limited.

[0320] For example, the base station 10, the terminal 20, and the like in one embodiment of the present disclosure can also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 11 is a diagram showing an example of a hardware structure of the base station 10 and the terminal 20 of one embodiment of the present disclosure. The base station 10 and the terminal 20 described above can also be configured as a computer device that physically includes the processor 1001, the storage 1002, the auxiliary storage 1003, the communication device 1004, the input device 1005, the output device 1006, the bus 1007, and the like.

[0321] In addition, in the following description, the expression "device" can be replaced with "circuit", "device", "unit", and the like. The hardware structure of the base station 10 and the terminal 20 can be configured to include one or more of each device illustrated, or can be configured not to include a part of the device.

[0322] Each function in the base station 10 and the terminal 20 is realized by reading predetermined software (program) into the hardware such as the processor 1001, the storage 1002, and the like, and performing operation by the processor 1001 and controlling at least one of communication of the communication device 1004 or reading and writing of data in the storage 1002 and the auxiliary storage 1003.

[0323] The processor 1001 controls the entire computer, for example, by causing an operating system to operate. The processor 1001 can also be constituted by a central processing device (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, the control section 140, the control section 240, and the like described above can also be implemented by the processor 1001.

[0324] Further, the processor 1001 reads out a program (program code), a software module, or data, and the like from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes according to the program. As the program, a program that causes the computer to execute at least a part of the operations described in the above-described embodiments is used. For example, Figure 9 The control section 140 of the base station 10 described above can also be implemented by a control program stored in the storage device 1002 and operating in the processor 1001. Also, for example, Figure 10 The control section 240 of the terminal 20 described above can also be implemented by a control program stored in the storage device 1002 and operating in the processor 1001. Although it is described that the above-described various processes are executed by one processor 1001, the above-described various processes can also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 can also be implemented by one or more chips. In addition, the program can also be transmitted from a network via a telecommunication line.

[0325] The storage device 1002 is a computer-readable recording medium, and can also be constituted by at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), and the like. The storage device 1002 can also be referred to as a register, a cache, a main storage, and the like. The storage device 1002 can hold a program (program code), a software module, and the like that can be executed in order to implement the communication method related to one embodiment of the present disclosure.

[0326] The auxiliary storage device 1003 is a computer-readable recording medium, and can be constituted by at least one of, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (for example, a card, a stick, a Key drive), a Floppy (registered trademark) disk, a magnetic stripe, and the like. The above-described storage medium can be, for example, a database, a server, and other appropriate medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0327] The communication device 1004 is hardware (a transceiver device) for performing communication between computers via at least one of a wired network and a wireless network, and can also be referred to as a network device, a network controller, a network card, a communication module, and the like. The communication device 1004 can also be constituted to include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, a transceiving antenna, an amplification section, a transceiving section, a transmission path interface, and the like can also be realized by the communication device 1004. The transceiving section can also be realized by a transmission section and a reception section, which are physically or logically separated.

[0328] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, and the like) that performs output to the outside. In addition, the input device 1005 and the output device 1006 can also be integrally constituted (for example, a touch panel).

[0329] Furthermore, the processor 1001 and each of the devices such as the storage device 1002 are connected by a bus 1007 for communicating information. The bus 1007 can be constituted by a single bus, or different buses can be used between the devices.

[0330] Furthermore, the base station 10 and the terminal 20 can be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), or a FPGA (Field Programmable Gate Array), and can also use this hardware to implement part or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0331] Figure 12 An example of the structure of vehicle 2001 is shown. For example... Figure 12 As shown, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a gearshift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013. The various forms / implementations described in this disclosure can also be applied to communication devices mounted on the vehicle 2001, for example, to the communication module 2013.

[0332] The drive unit 2002 may be composed, for example, an engine, a motor, or a hybrid power system of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a steering wheel), configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel by the user.

[0333] The electronic control unit 2010 consists of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (I / O port) 2033. Signals from various sensors 2021 to 2029 of the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 can also be referred to as an ECU (Electronic Control Unit).

[0334] As signals from various sensors 2021 to 2029, there are a current signal from a current sensor 2021 that senses a current of a motor, a rotational speed signal of a front wheel and a rear wheel acquired by a rotational speed sensor 2022, a pneumatic pressure signal of the front wheel and the rear wheel acquired by a pneumatic pressure sensor 2023, a vehicle speed signal acquired by a vehicle speed sensor 2024, an acceleration signal acquired by an acceleration sensor 2025, a depression amount signal of an accelerator pedal acquired by an accelerator pedal sensor 2029, a depression amount signal of a brake pedal acquired by a brake pedal sensor 2026, an operation signal of a shift lever acquired by a shift lever sensor 2027, a detection signal for detecting an obstacle, a vehicle, a pedestrian, and the like acquired by an object detection sensor 2028, and the like.

[0335] The information service section 2012 is constituted by various devices for providing various information such as driving information, traffic information, entertainment information, and the like, and one or more ECUs that control these devices, such as a car navigation system, an audio system, a speaker, a television, a radio, and the like. The information service section 2012 provides various multimedia information and multimedia services to an occupant of the vehicle 2001 using information acquired from an external device via the communication module 2013 or the like.

[0336] The drive assist system section 2030 is constituted by various devices for providing a function of preventing an accident from occurring or reducing a driving load on a driver, such as a millimeter wave radar, a LiDAR (Light Detection and Ranging), a camera, a positioner for positioning (for example, a GNSS or the like), map information (for example, a high-definition (HD) map, an autonomous vehicle (AV) map, or the like), a gyro system (for example, an IMU (Inertial Measurement Unit), an INS (Inertial Navigation System), or the like), an AI (Artificial Intelligence) chip, an AI processor, and one or more ECUs that control these devices. In addition, the drive assist system section 2030 transmits and receives various information via the communication module 2013, and realizes a drive assist function or an autonomous driving function.

[0337] The communication module 2013 is capable of communicating with the microprocessor 2031 and the constituent elements of the vehicle 2001 via a communication port. For example, the communication module 2013 transmits and receives data between the microprocessor 2031 and the memory (ROM, RAM) 2032, the sensors 2021 to 2029, in the drive section 2002, the steering section 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheel 2007, the rear wheel 2008, the axle 2009, the electronic control section 2010 possessed by the vehicle 2001, via the communication port 2033.

[0338] The communication module 2013 is capable of communicating with external devices, and is controlled by the microprocessor 2031 of the electronic control unit 2010. For example, various information is transmitted and received between the communication module 2013 and external devices via wireless communication. The communication module 2013 can be located inside or outside the electronic control unit 2010. The external devices can be, for example, base stations, mobile stations, and the like.

[0339] The communication module 2013 transmits the current signal from the current sensor input to the electronic control unit 2010 to the external devices via wireless communication. In addition, the communication module 2013 transmits the rotational speed signal of the front wheels and the rear wheels acquired by the rotational speed sensor 2022, the air pressure signal of the front wheels and the rear wheels acquired by the air pressure sensor 2023, the vehicle speed signal acquired by the vehicle speed sensor 2024, the acceleration signal acquired by the acceleration sensor 2025, the depression amount signal of the accelerator pedal acquired by the accelerator pedal sensor 2029, the depression amount signal of the brake pedal acquired by the brake pedal sensor 2026, the operation signal of the shift lever acquired by the shift lever sensor 2027, the detection signal for detecting obstacles, vehicles, pedestrians, and the like acquired by the object detection sensor 2028, and the like, which are input to the electronic control unit 2010, to the external devices via wireless communication.

[0340] The communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, and the like) transmitted from the external devices, and displays the information on the information service unit 2012 provided in the vehicle 2001. In addition, the communication module 2013 stores the various information received from the external devices in the memory 2032 available to the microprocessor 2031. The microprocessor 2031 can also control the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheels 2007, the rear wheels 2008, the axle 2009, the sensors 2021 to 2029, and the like provided in the vehicle 2001, based on the information stored in the memory 2032.

[0341] (Supplement to Embodiments)

[0342] The above describes the embodiments of the present application, but the disclosed application is not limited to such embodiments, and those skilled in the art will understand various modifications, changes, alternatives, substitutions, and the like. Specific numerical examples are used for facilitating understanding of the application, but these numerical examples are only one example, and any appropriate value can be used unless specifically indicated. The items in the above description are not essential to the present application, and two or more items described in the items can be combined as needed, or an item can be applied to another item (as long as there is no contradiction). The boundaries of the functional blocks or processing blocks in the functional block diagram do not necessarily correspond to the boundaries of physical components. The actions of multiple functional blocks can be performed by one physical component, or the actions of one functional block can be performed by multiple physical components. The order of the processes described in the embodiments can be changed as long as there is no contradiction. The base station 10 and the terminal 20 are described using a functional block diagram for facilitating the description of the processes, but such devices can also be implemented by hardware, software, or a combination thereof. Software that acts according to the embodiments of the present application by the processor of the base station 10 and software that acts according to the embodiments of the present application by the processor of the terminal 20 can each be stored in a random access memory (RAM), a flash memory, a read only memory (ROM), an EPROM, an EEPROM, a register, a hard disk (HDD), a removable disk, a CD-ROM, a database, a server, and any other appropriate storage medium.

[0343] Further, the notification of the information is not limited to the forms / embodiments described in the present disclosure, and other methods can be used. For example, the notification of the information can be implemented by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof. Further, the RRC signaling can be referred to as an RRC message, and for example, can be an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0344] The forms / embodiments described in this disclosure can also be applied to at least one of systems utilizing LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6G (6th generation mobile communication system), xG (xth generation mobile communication system) (xG (x is an integer, a fraction) ), FRA (Future Radio Access), NR (new Radio), NX (New radio access), FX (Future generation radio access), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), other appropriate systems, and next-generation systems extended, modified, created, and specified based on these systems. Furthermore, a plurality of systems (for example, at least one of LTE and LTE-A and 5G, and the like) can be combined and applied.

[0345] For the processes, timing, flow, and the like of the forms / embodiments described in this specification, the order can be changed without contradiction. For example, for the methods described in this disclosure, the elements of various steps are prompted using the order of the examples, but are not limited to the specific order prompted.

[0346] In the present specification, specific actions performed by the base station 10 are sometimes also performed by an upper node thereof, as appropriate. In a network constituted by one or a plurality of network nodes having the base station 10, it is obvious that various actions performed for communication with the terminal 20 can be performed by at least one of the base station 10 and other network nodes (for example, consider an MME or an S-GW or the like, but not limited to these) other than the base station 10. In the above, a case where the other network node other than the base station 10 is one is exemplified, but the other network node can also be a combination of a plurality of other network nodes (for example, an MME and an S-GW).

[0347] Information or a signal and the like explained in the present disclosure can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It can also be input or output via a plurality of network nodes.

[0348] Information and the like input or output can be saved in a specific location (for example, a memory), and can be managed using a management table. Information and the like input or output can be rewritten, updated, or appended. Information and the like output can also be deleted. Information and the like input can also be transmitted to other apparatuses.

[0349] Determination in the present disclosure can be performed by a value (0 or 1) represented by 1 bit, by a Boolean value (true or false), or by comparison of numerical values (for example, comparison with a predetermined value).

[0350] As for software, regardless of being called software, firmware, middleware, microcode, hardware description language, or by another name, it should be broadly interpreted as meaning a command, a command set, code, a code segment, program code, a program, a subprogram, a software module, an application, a software application, a software package, a routine, a sub routine, an object, an executable file, an execution thread, a procedure, a function, and the like.

[0351] In addition, software, commands, information, and the like can also be transmitted and received via a transmission medium. For example, in a case where software is transmitted from a web page, a server, or another remote source using at least one of wired technology (coaxial cable, optical fiber cable, twisted pair cable, digital subscriber line (DSL), and the like) and wireless technology (infrared rays, microwaves, and the like), at least one of these wired technology and wireless technology is included in the definition of the transmission medium.

[0352] The information, signals, and / or the like described in the present disclosure can be represented using various different technologies and / or techniques. For example, data, commands, instructions, information, signals, bits, symbols, chips, and / or the like that can be referenced throughout the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0353] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure can be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol can also be a signal (signaling). Also, a signal can be a message. Also, a component carrier (CC) can be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

[0354] The terms "system" and "network" used in the present disclosure can be used interchangeably.

[0355] Also, the information, parameters, and / or the like described in the present disclosure can be represented using absolute values, relative values with respect to predetermined values, or corresponding other information. For example, a radio resource can be indicated using an index.

[0356] The names used for the above-described parameters are non-limiting names in any respect. Further, the mathematical expressions and / or the like using these parameters are sometimes different from those explicitly disclosed in the present disclosure. Various channels (e.g., PUCCH, PDCCH, and / or the like) and information elements can be identified by all appropriate names, and thus various names assigned to the various channels and information elements are non-limiting names in any respect.

[0357] In the present disclosure, the terms "base station (BS)", "wireless base station", "base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier", and / or the like can be used interchangeably. The base station is sometimes referred to as a macro cell, a small cell, a femto cell, a pico cell, and / or the like.

[0358] A base station can accommodate one or plural (for example, 3) cells. In a case where a base station accommodates plural cells, the coverage area of the base station as a whole can be divided into plural smaller areas, and each of the smaller areas can also be provided with a communication service by a base station subsystem (for example, a small-sized base station RRH: Remote Radio Head for indoor use). The term "cell" or "sector" refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides a communication service in the coverage.

[0359] In the present disclosure, the terms "mobile station (MS)", "user terminal", "user equipment (UE)", "terminal", and the like can be used interchangeably.

[0360] For a mobile station, the following terms are also used by those skilled in the art: 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.

[0361] At least one of the base station and the mobile station can also be referred to as a transmission device, a reception device, a communication device, and the like. In addition, at least one of the base station and the mobile station can be a device mounted on a moving body, the moving body itself, and the like. The moving body can be a vehicle (for example, an automobile, an airplane, and the like), can be a moving body that moves in an unmanned manner (for example, a drone, an autonomous vehicle, and the like), and can be a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing a communication operation. For example, at least one of the base station and the mobile station can be an IoT (Internet of Things) device such as a sensor.

[0362] Furthermore, the base station in this disclosure can also be replaced by a user terminal. For example, the communication between the base station and the user terminal can be replaced by communication between multiple terminals 20 (e.g., D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.), and various forms / implementations of this disclosure can also be applied. In this case, the terminal 20 can also be configured to have the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be replaced with terms corresponding to inter-terminal communication (e.g., "side"). For example, uplink channel, downlink channel, etc., can also be replaced with side channel.

[0363] Similarly, the user terminal in this disclosure can be replaced by a base station. In this case, the base station can also be configured to have the functions of the aforementioned user terminal.

[0364] The terms "determining" and "determining" as used in this disclosure sometimes encompass a variety of actions. For example, "determining" or "determining" may include actions such as judging, calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, database, or other data structure), and ascertaining, which are considered as actions of "determining" or "determining." Furthermore, "determining" or "determining" may include actions such as receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, and accessing (e.g., accessing data in memory), which are considered as actions of "determining" or "determining." Additionally, "determining" or "determining" may include actions such as resolving, selecting, choosing, establishing, and comparing, which are considered as actions of "determining" or "determining." That is, "judgment" and "decision" can include matters that are considered as having been "judged" or "decided". In addition, "judgment (decision)" can also be replaced by "assuming", "expecting", "considering", etc.

[0365] The terms "connected," "coupled," and "coupling," or all variations and derivatives thereof, used in the disclosure, can mean the connection or coupling between two or more elements, which can either be direct or indirect, and can include the use of one or more wires, cables and printed electrical connections, as non-limiting and non-exclusive examples. As used in the disclosure, two elements can be considered to be "connected" or "coupled" to each other by the function of one or more electrical wires, cables and printed electrical connections, as non-limiting and non-exclusive examples, as well as by electromagnetic energy such as electromagnetic waves having frequencies in the radio, microwave, and light (including both visible and invisible) areas, as non-limiting and non-exclusive examples.

[0366] A reference signal can be referred to as RS (Reference Signal) or Pilot depending on the standard being applied.

[0367] As used in the disclosure, the expression "based on" does not mean "only based on" unless otherwise explicitly stated. In other words, the expression "based on" means both "only based on" and "at least based on."

[0368] Any reference to elements using the expressions "1st," "2nd," and the like used in the disclosure does not limit the number or order of the elements. These expressions can be used in the disclosure as a convenient method of distinguishing between two or more elements. Therefore, a reference to a 1st element and a 2nd element does not mean that only two elements are taken or that in any form the 1st element must precede the 2nd element.

[0369] The expression "unit" in the structure of each of the above-described apparatuses can be replaced with the expression "part," "circuit," "device," or the like.

[0370] As used in the disclosure, the expressions "include," "including," and variations thereof mean the same as the expression "comprising." Also, as used in the disclosure, the expression "or" does not mean exclusive or.

[0371] A radio frame can be composed of one or more slots in the time domain. In the time domain, one or more slots can be referred to as a subframe. A subframe can also be composed of one or more slots in the time domain. A subframe can also be a fixed length of time regardless of numerology (e.g., 1 ms).

[0372] A numerology can be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. The numerology can indicate at least one of a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering processing by a transceiver in a frequency domain, a specific windowing processing by a transceiver in a time domain, and the like, for example.

[0373] A slot can be constituted by one or a plurality of symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, and the like) in a time domain. The slot can be a time unit based on a numerology.

[0374] A slot can include a plurality of mini-slots. Each mini-slot can be constituted by one or a plurality of symbols in a time domain. Further, the mini-slot can also be referred to as a sub-slot. The mini-slot can be constituted by a smaller number of symbols than the slot. A PDSCH (or PUSCH) transmitted in a time unit larger than the mini-slot can be referred to as PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using the mini-slot can be referred to as PDSCH (or PUSCH) mapping type B.

[0375] A radio frame, a subframe, a slot, a mini-slot, and a symbol each indicate a time unit in transmission of a signal. The radio frame, the subframe, the slot, the mini-slot, and the symbol can each use a corresponding other name.

[0376] For example, 1 subframe can be referred to as a transmission time interval (TTI), a plurality of consecutive subframes can also be referred to as a TTI, 1 slot or 1 mini-slot can also be referred to as a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in the existing LTE, can be a period shorter than 1 ms (for example, 1-13 symbols), or can be a period longer than 1 ms. In addition, a unit indicating a TTI can not be referred to as a subframe, but can be referred to as a slot, a mini-slot, or the like.

[0377] Here, the TTI refers to, for example, a minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling of allocating a radio resource (a frequency bandwidth, a transmission power, and the like that can be used in each terminal 20) to each terminal 20 in units of TTI. Note that the definition of TTI is not limited to this.

[0378] The TTI can be a transmission time unit of a channel-encoded data packet (transport block), a code block, a codeword, or the like, and can also be a processing unit of scheduling, link adaptation, or the like. Note that when the TTI is given, the time interval (for example, the number of symbols) in which a transport block, a code block, a codeword, or the like is actually mapped can be shorter than the TTI.

[0379] Note that in a case where one slot or one mini-slot is referred to as TTI, one or more TTIs (that is, one or more slots or one or more mini-slots) can be a minimum time unit of scheduling. Furthermore, the number of slots (the number of mini-slots) that constitute the minimum time unit of scheduling can be controlled.

[0380] The TTI having a time length of 1 ms is also referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI (normal TTI), a long TTI (long TTI), a normal subframe, a normal subframe (normal subframe), a long (long) subframe, a slot, or the like. A TTI shorter than the normal TTI can also be referred to as a shortened TTI, a short TTI (short TTI), a partial TTI (partial or fractional TTI), a shortened subframe, a short (short) subframe, a mini-slot, a sub-slot, a slot, or the like.

[0381] Note that the long TTI (long TTI) (for example, a normal TTI, a subframe, or the like) can be understood as a TTI having a time length longer than 1 ms, and the short TTI (short TTI) (for example, a shortened TTI, or the like) can be understood as a TTI having a TTI length shorter than the long TTI (long TTI) and a TTI length of 1 ms or more.

[0382] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and in the frequency domain, can include one or a plurality of contiguous subcarriers. The number of subcarriers included in the RB can be the same regardless of the numerology, and for example, can be 12. The number of subcarriers included in the RB can also be determined in accordance with the numerology.

[0383] In addition, the time domain of the RB can include one or a plurality of symbols, and can be 1 slot, 1 mini-slot, 1 subframe, or 1 TTI in length. 1 TTI, 1 subframe, and the like can each be composed of one or a plurality of resource blocks.

[0384] In addition, one or a plurality of RBs can also be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, and the like.

[0385] In addition, a resource block can be composed of one or a plurality of resource elements (REs). For example, 1 RE can be a wireless resource area of 1 subcarrier and 1 symbol.

[0386] A bandwidth part (BWP) (may also be referred to as a partial bandwidth, and the like) can also indicate a subset of contiguous common resource blocks (RBs) for a certain numerology in a certain carrier. Here, the common RBs can be determined by the index of the RBs with reference to a common reference point of the carrier. A PRB can be defined in a certain BWP and numbered within the BWP.

[0387] A BWP can include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or a plurality of BWP can be configured for the terminal 20 within 1 carrier.

[0388] At least one of the configured BWP can be active, and a case in which the terminal 20 transmits / receives a predetermined signal / channel outside the active BWP can not be assumed. In addition, "cell", "carrier", and the like in the present disclosure can be replaced with "BWP".

[0389] The structures of the wireless frame, the subframe, the slot, the mini-slot, and the symbol described above, and the like are merely examples. For example, the number of subframes included in the wireless frame, the number of slots per subframe or per wireless frame, the number of mini-slots included in the slot, the number of symbols and RBs included in the slot or the mini-slot, the number of subcarriers included in the RB, and the number of symbols, the symbol length, the cyclic prefix (CP) length, and the like within the TTI can be variously changed.

[0390] In the present disclosure, for example, in a case in which an article is pluralized by translation of a, an, and the in English, the present disclosure also includes a case in which the article is pluralized after the article.

[0391] In the present disclosure, the expression "A and B are different" can mean "A and B are mutually different". In addition, the expression can also mean "A and B are each different from C". The expressions "separation", "combination", and the like can also be interpreted in the same way as "different".

[0392] The forms / embodiments described in the present disclosure can be used alone or in combination, and can also be switched in use according to execution. In addition, the notification of predetermined information is not limited to being performed explicitly (for example, notification of "X is X"), but can also be performed implicitly (for example, without performing the notification of the predetermined information).

[0393] The above has been described in detail for the present disclosure, but it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as modifications and changes without departing from the spirit and scope of the present disclosure determined by the claims. Therefore, the purpose of the description of the present disclosure is to illustrate, and the present disclosure does not have any limiting meaning.

[0394] This international patent application claims priority from Japanese Patent Application No. 2023-072202 filed on April 26, 2023, and the entire contents of Japanese Patent Application No. 2023-072202 are incorporated into the present application.

[0395] Label Explanation

[0396] 10: base station

[0397] 110: transmission unit

[0398] 120: reception unit

[0399] 130: setting unit

[0400] 140: control unit

[0401] 20: terminal

[0402] 210: transmission unit

[0403] 220: reception unit

[0404] 230: setting unit

[0405] 240: control unit

[0406] 1001: processor

[0407] 1002: storage device

[0408] 1003: auxiliary storage device

[0409] 1004: communication device

[0410] 1005: input device

[0411] 1006: output device

[0412] 2001: vehicle

[0413] 2002: drive section

[0414] 2003: steering section

[0415] 2004: accelerator pedal

[0416] 2005: brake pedal

[0417] 2006: gear lever

[0418] 2007: front wheel

[0419] 2008: rear wheel

[0420] 2009: axle

[0421] 2010: electronic control section

[0422] 2012: information service section

[0423] 2013: communication module

[0424] 2021: current sensor

[0425] 2022: rotational speed sensor

[0426] 2023: air pressure sensor

[0427] 2024: vehicle speed sensor

[0428] 2025: acceleration sensor

[0429] 2026: brake pedal sensor

[0430] 2027: gear lever sensor

[0431] 2028: object detection sensor

[0432] 2029: accelerator pedal sensor

[0433] 2030: driving assistance system section

[0434] 2031: microprocessor

[0435] 2032: memory (ROM, RAM)

[0436] 2033: communication port (I / O port)

Claims

1. A terminal having: The control unit envisions the base station performing an intermittent transmission function that enables or disables the transmission unit; The communication unit, based on the envisioned intermittent transmission function, performs reception from the base station; as well as The receiving unit receives control information related to the intermittent transmission function from the base station. The control unit decides whether to envision receiving a physical downlink control channel from the base station during the inactivity period of the intermittent transmission function, the physical downlink control channel being used to notify whether at least one of cell intermittent transmission and cell intermittent reception is dynamically enabled or disabled.

2. The terminal according to claim 1, wherein, The control unit envisions receiving the physical downlink channel from the base station during the inactivity period of the intermittent transmission function.

3. The terminal according to claim 1, wherein, The control unit does not intend to receive the physical downlink channel from the base station during the inactivity period of the intermittent transmission function.

4. The terminal according to claim 1, wherein, The terminal also has a transmitting unit that reports to the base station the capability to support whether to envision receiving a switch of the physical downlink channel from the base station during the inactivity of the intermittent transmission function.

5. A base station, comprising: The control unit performs the intermittent transmission function, which enables or disables the transmitting unit. The communication unit, based on the intermittent transmission function, performs transmission to the terminal; and The transmitting unit sends control information related to the intermittent transmission function to the terminal. The control unit decides whether to send a physical downlink control channel to the terminal during the inactivity period of the intermittent transmission function. The physical downlink control channel is used to notify whether at least one of cell intermittent transmission and cell intermittent reception is dynamically enabled or disabled.

6. A communication method in which a terminal performs the following steps: Imagine that the base station performs an intermittent transmission function that enables or disables the transmitting unit; Based on the envisioned intermittent transmission function, reception from the base station is performed; Receive control information related to the intermittent transmission function from the base station; as well as Decide whether to envision receiving a physical downlink control channel from the base station during the inactivity period of the intermittent transmission function, the physical downlink control channel being used to notify whether at least one of cell intermittent transmission and cell intermittent reception is dynamically enabled or disabled.

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