Terminals, base stations, and communication methods

Abstract

This invention provides a method for ensuring the reliability of signaling for activation / deactivation of cell DTX / DRX in wireless communication systems, thereby enabling power saving. [Solution] The terminal comprises a receiving unit that receives information from a base station indicating the activation or deactivation of intermittent cell transmission or intermittent cell reception, a control unit that generates feedback information for the information, and a transmitting unit that transmits the feedback information to the base station.

Description

[[Technical Field]]

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

[0002] In NR (New Radio) (also referred to as "5G"), which is a successor system to LTE (Long Term Evolution), technologies that satisfy requirements such as large-capacity systems, high data transmission rates, low latency, simultaneous connection of a large number of terminals, low cost, and power saving are being studied (see, for example, Non-Patent Document 1).

[0003] In NR Release 18, energy saving specifications for base stations are being studied. Details are a subject for future study. [[Prior Art Documents]] [[Non-Patent Documents]]

[0004] [[Non-Patent Document 1]] 3GPP TS 38.300 V17.3.0 (2022-12) [[Summary of the Invention]] [[Problem to be Solved by the Invention]]

[0005] In order to achieve carbon neutrality and the SDGs, the importance of saving power consumption of wireless communication systems (e.g., base stations) is increasing. However, conventionally, a method for implementing feedback for signaling for Activation / Deactivation of cell DTX / DRX that enables power consumption saving has not been determined. Therefore, the reliability of signaling for Activation / Deactivation of cell DTX / DRX has not been guaranteed.

[0006] This invention has been made in view of the above points, and can guarantee the reliability of signaling for activation / deactivation of cell DTX / DRX, which enables power saving. [Means for solving the problem]

[0007] The terminal in this embodiment includes a receiving unit that receives information from a base station indicating the activation or deactivation of intermittent cell transmission or intermittent cell reception, a control unit that generates feedback information for the information, and a transmitting unit that transmits the feedback information to the base station. [Effects of the Invention]

[0008] According to this embodiment, in a wireless communication system, the reliability of signaling for activation / deactivation of cell DTX / DRX, which enables power saving, can be guaranteed. [Brief explanation of the drawing]

[0009] [Figure 1] This is a diagram illustrating the wireless communication system in this embodiment. [Figure 2] This figure illustrates the first HARQ-ACK reporting mode for MBS in this embodiment. [Figure 3] This figure illustrates a second HARQ-ACK reporting mode for MBS in this embodiment. [Figure 4] This figure shows an example of the operation of the terminal in the first embodiment. [Figure 5] This figure shows an example of the operation of the terminal in the second embodiment. [Figure 6] This figure shows an example of the operation of the terminal in the third embodiment. [Figure 7] This figure shows an example of terminal operation based on the first HARQ-ACK reporting mode in the third embodiment. [Figure 8]This figure shows an example of terminal operation based on the second HARQ-ACK reporting mode in the third embodiment. [Figure 9] This figure shows an example of the functional configuration of a base station in this embodiment. [Figure 10] This figure shows an example of the functional configuration of the terminal in this embodiment. [Figure 11] This figure shows an example of the hardware configuration of a base station or terminal in this embodiment. [Figure 12] This figure shows an example of the vehicle configuration in this embodiment. [Modes for carrying out the invention]

[0010] This embodiment will be described below with reference to the drawings. Note that the embodiments described below are examples, and the embodiments to which the present invention applies are not limited to those described below.

[0011] In the operation of the wireless communication system of this embodiment, existing technologies may be used as appropriate. Such existing technologies include, for example, existing NR or LTE, but are not limited to existing NR or LTE. Furthermore, the term "LTE" as used herein has a broad meaning that includes LTE-Advanced and LTE-Advanced and later technologies (e.g., NR), unless otherwise specified.

[0012] Furthermore, in the present embodiment described below, terms such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel) used in existing LTE are used. This is for convenience of description, and signals, functions, and the like equivalent to these may be referred to by other names. Furthermore, the above-mentioned terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, and the like. However, even for signals used in NR, the prefix "NR-" is not necessarily explicitly stated.

[0013] Furthermore, in the present embodiment, the duplex scheme may be a TDD (Time Division Duplex) scheme, an FDD (Frequency Division Duplex) scheme, or another scheme (for example, Flexible Duplex or the like).

[0014] Furthermore, in the present embodiment, that a radio parameter or the like is "configured" may mean that a predetermined value is pre-configured, or may mean that a radio parameter notified from a base station or a terminal is configured.

[0015] (System Configuration) Figure 1 is a diagram for explaining a radio communication system according to the present embodiment. The radio communication system according to the present embodiment includes a base station 10 and a terminal 20, as illustrated in FIG. 1. Although one base station 10 and one terminal 20 are shown in FIG. 1, this is an example, and there may be a plurality of each.

[0016] The base station 10 is a communication device that provides one or more cells and performs radio communication with the terminal 20. Physical resources of a radio signal are defined in the time domain and the frequency domain. The time domain may be defined by the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. Further, a Transmission Time Interval (TTI) in the time domain may be a slot, or the TTI may be a subframe.

[0017] The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signal is, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, on NR-PBCH, and is also referred to as broadcast information. The synchronization signal and the system information may be referred to as an SS / PBCH block (SSB). As illustrated in FIG. 1, the base station 10 transmits a control signal or data to the terminal 20 via Downlink (DL), and receives a control signal or data from the terminal 20 via Uplink (UL). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. Further, both the base station 10 and the terminal 20 can apply communication by Multiple Input Multiple Output (MIMO) to DL or UL. In addition, both the base station 10 and the terminal 20 may perform communication via a Secondary Cell (SCell) and a Primary Cell (PCell) based on Carrier Aggregation (CA). Furthermore, the terminal 20 may perform communication via a primary cell of the base station 10 and a Primary SCG Cell (PSCell) of another base station 10 based on Dual Connectivity (DC).

[0018] Terminal 20 is a communication device equipped with wireless communication capabilities, such as a smartphone, mobile phone, tablet, wearable device, or M2M (Machine-to-Machine) communication module. As shown in Figure 1, Terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. Terminal 20 also receives various reference signals transmitted from the base station 10 and performs propagation path quality measurements based on the reception results of these reference signals. Terminal 20 may also be referred to as UE and base station 10 as gNB.

[0019] The wireless communication system in this embodiment supports a Hybrid automatic repeat request (HARQ)-ACK reporting mode for two Multicast Broadcast Services (MBS).

[0020] Figure 2 is a diagram illustrating the first HARQ-ACK reporting mode. In the first HARQ-ACK reporting mode, both ACK and NACK are reported. That is, in the first HARQ-ACK reporting mode, an ACK or NACK for each terminal 10 is reported to the base station 10 based on the result of error detection using the Cyclic Redundancy Check (CRC) of the Group-common PDSCH. In the example in Figure 2, UE2 and UE3 do not detect an error in the CRC of the Group-common PDSCH, and therefore UE2 and UE3 report an ACK. On the other hand, in the example in Figure 2, an error in the CRC of the Group-common PDSCH is detected in UE1 and UE4, and therefore UE1 and UE4 report a NACK.

[0021] In the first HARQ-ACK reporting mode, all PUCCH formats (0, 1, 2, 3, or 4) may be used. Since the first HARQ-ACK reporting mode requests orthogonal PUCCH resources between terminals, it is suitable when there are few terminals in the group.

[0022] Figure 3 illustrates the second HARQ-ACK reporting mode. In the second HARQ-ACK reporting mode, only NACKs are reported. That is, in the second HARQ-ACK reporting mode, only NACKs based on the detection of errors in the CRC of the group-common PDSCH are reported. In the example in Figure 3, UE2 and UE3 do not detect any errors in the CRC of the group-common PDSCH, and therefore UE2 and UE3 do not report any feedback. On the other hand, in the example in Figure 3, NACKs based on the CRC errors of the group-common PDSCH detected in UE1 and UE4 are reported.

[0023] In the second HARQ-ACK reporting mode, PUCCH format 0 / 1 may be used. In the second HARQ-ACK reporting mode, PUCCH resources may be shared among terminals, thus reducing PUCCH overhead. Therefore, the second HARQ-ACK reporting mode is suitable when there are many terminals in the group.

[0024] To reduce power consumption at base station 10, cell DTX (Discontinuous Transmission) / DRX (Discontinuous Reception) is being considered. Whether to support L1 signaling (e.g., DCI) for cell DTX / DRX activation / deactivation is being discussed, and a group-common based signaling scheme may be applied to cell DTX / DRX activation / deactivation.

[0025] However, a feedback mechanism to ensure the reliability of signaling for cell DTX / DRX activation / deactivation has not been determined.

[0026] This embodiment provides a method for providing feedback to signaling for activation / deactivation of cell DTX / DRX in a wireless communication system. In this embodiment, cell DTX / DRX refers to cell DTX and / or DRX. In this embodiment, activation and / or deactivation refer to these terms.

[0027] Whether or not to perform cell DRX is determined by higher-layer parameters, and the period, start slot, offset, and duration may also be set. Furthermore, the applicability of cell DRX may be determined by quasi-static, dynamic, or flexible network conditions.

[0028] Whether or not to perform cell DTX is determined by higher-layer parameters, and the period, start slot, offset, and duration may also be set. Furthermore, the applicability of cell DTX may be determined by quasi-static, dynamic, or flexible network conditions.

[0029] (First embodiment) According to the first embodiment, even if the terminal 20 receives L1 signaling from the base station 10 for activation / deactivation of cell DTX / DRX, the terminal 20 may be configured not to provide feedback on the received L1 signaling.

[0030] Figure 4 shows an example of the operation of terminal 20 in the first embodiment. As shown in Figure 4, in step S11, terminal 20 receives L1 signaling for activation / deactivation of cell DTX / DRX. Next, in step S12, terminal 20 controls not to provide feedback (e.g., sending ACK / NACK) to the L1 signaling for activation / deactivation of cell DTX / DRX.

[0031] (Second embodiment) According to the second embodiment, MAC (Medium Access Control) (or MAC signaling) feedback may be provided to the signaling for activation / deactivation of cell DTX / DRX. MAC feedback is, for example, the transmission of a MAC CE (Control Element) for ACK to the signaling for activation / deactivation of cell DTX / DRX. Thus, a MAC CE or MAC signaling for ACK to the signaling for activation / deactivation of cell DTX / DRX is used to transmit feedback information.

[0032] Figure 5 shows an example of the operation of terminal 20 in the second embodiment. As shown in Figure 5, in step S21, terminal 20 receives signaling for activation / deactivation of cell DTX / DRX. Next, in step S22, terminal 20 provides MAC feedback to the signaling for activation / deactivation of cell DTX / DRX. The cell DTX / DRX Confirmation MAC may be identified by a MAC subheader having an LCID (Logical Channel ID).

[0033] (Third embodiment) According to the third embodiment, HARQ-ACK feedback may be provided for the activation / deactivation signaling of cell DTX / DRX. Figure 6 shows an example of the operation of terminal 20 in the third embodiment. As shown in Figure 6, in step S31, terminal 20 receives the activation / deactivation signaling of cell DTX / DRX. Next, in step S32, terminal 20 provides HARQ-ACK feedback for the activation / deactivation signaling of cell DTX / DRX.

[0034] In a third embodiment, the HARQ-ACK reporting mode for the MBS may be applied to HARQ-ACK feedback for signaling for activation / deactivation of cell DTX / DRX.

[0035] Figure 7 shows an example of how the first HARQ-ACK reporting mode for MBS operates when applied to HARQ-ACK feedback for signaling for activation / deactivation of cell DTX / DRX.

[0036] As shown in Figure 7, when the terminal 20, which has been set to the first HARQ-ACK reporting mode, successfully detects the DCI format indicating the activation / deactivation of the cell DTX / DRX (Yes in step S301), the terminal 20 generates HARQ-ACK information including the ACK value (step S302). Then, the terminal 20 decides whether to send a PUCCH or PUSCH to provide the HARQ-ACK information (feedback information) including the ACK value (step S303), and sends the PUCCH or PUSCH to the base station 10.

[0037] On the other hand, if terminal 20 fails to successfully detect the DCI format indicating the activation / deactivation of cell DTX / DRX (No in step S301), terminal 20 generates HARQ-ACK information including the NACK value (step S304). Then, terminal 20 determines whether to send a PUCCH or PUSCH to provide the HARQ-ACK information including the NACK value (step S303), and sends the PUCCH or PUSCH to base station 10.

[0038] Terminal 20 may, for example, determine that the DCI format has been detected correctly if no errors are detected in the DCI's CRC. On the other hand, terminal 20 may, for example, determine that the DCI format has been detected correctly if errors are detected in the DCI's CRC.

[0039] Figure 8 shows an example of how a second HARQ-ACK reporting mode for MBS operates when applied to HARQ-ACK feedback for signaling for activation / deactivation of cell DTX / DRX.

[0040] As shown in Figure 8, terminal 20 configured with the second HARQ-ACK reporting mode does not transmit a PUCCH containing only HARQ-ACK information including the ACK value. However, in the third embodiment, the second HARQ reporting mode is not applied to DCI formats that have HARQ-ACK information that does not schedule PDSCH reception, except for DCI formats that indicate the first SPS PDSCH reception or activation / deactivation of cell DTX / DRX after enabling SPS PDSCH reception for the SPS configuration.

[0041] (Fourth embodiment) In a wireless communication system, which of the first to third embodiments described above is used for feedback may be determined by higher-layer parameters. For example, the RRC parameters may specify which of the first to third embodiments is used for feedback. The terminal 20 may perform a HARQ-ACK feedback method for signaling for activation / deactivation of cell DTX / DRX based on the RRC signaling received from the base station 10.

[0042] For example, the terminal capability (UE capability) of terminal 20 may specify the first to third embodiments of feedback methods supported by terminal 20. Terminal 20 may transmit the terminal capability indicating the supported feedback methods to base station 10.

[0043] In a wireless communication system, which of the first to third embodiments described above is used for feedback is specified in the specification (for example, the technical specification of the 3GPP® standard), and the terminal 20 may operate in accordance with that specification.

[0044] In the wireless communication system, which of the first to third embodiments of feedback method is used may be determined based on the configuration of the higher-layer parameters described above and the terminal capabilities of the terminal 20.

[0045] In a wireless communication system, the choice of which of the first to third embodiments of feedback method is used may be specified by DCI indication.

[0046] For example, in the terminal capabilities of terminal 20, it may be defined whether terminal 20 supports a feedback mechanism for activation / deactivation of cell DTX / DRX.

[0047] The above-described embodiment enables feedback to be provided for signaling for activation / deactivation of cell DTX / DRX in a wireless communication system. This ensures the reliability of signaling for activation / deactivation of cell DTX / DRX.

[0048] (Device configuration) Next, we will describe an example of the functional configuration of the base station 10 and terminal 20 that perform the processes and operations described above. The base station 10 and terminal 20 include functions to perform the embodiments described above. However, the base station 10 and terminal 20 may each be equipped with only one of the proposed functions from the embodiments.

[0049] <Base station 10> Figure 9 shows an example of the functional configuration of a base station. As shown in Figure 9, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Figure 9 is just one example. The names of the functional categories and functional units can be anything as long as they can perform the operations in this embodiment. The transmitting unit 110 and the receiving unit 120 may be called the communication unit.

[0050] The transmitting unit 110 includes the function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The receiving unit 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining information from the received signals, for example, information of a higher layer. The transmitting unit 110 also has the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DL data, etc. to the terminal 20. The transmitting unit 110 also transmits setting information, etc., as described in the embodiment.

[0051] The setting unit 130 stores pre-configured setting information and various setting information to be transmitted to the terminal 20 in a storage device and reads it from the storage device as needed. The control unit 140 performs control of the entire base station 10, including control related to signal transmission and reception. The signal transmission function unit of the control unit 140 may be included in the transmission unit 110, and the signal reception function unit of the control unit 140 may be included in the reception unit 120. The transmission unit 110 and the reception unit 120 may also be called the transmitter and receiver, respectively.

[0052] <Terminal 20> Figure 10 shows an example of the functional configuration of a terminal. As shown in Figure 10, the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Figure 10 is just one example. The names of the functional categories and functional units can be anything as long as they can perform the operations in this embodiment. The transmitting unit 210 and the receiving unit 220 may be called the communication unit.

[0053] The transmitting unit 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 wirelessly receives various signals and obtains signals from higher layers from the received physical layer signals. The transmitting unit 210 also transmits a HARQ-ACK, and the receiving unit 220 receives the configuration information and the like as described in the embodiment.

[0054] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 in a storage device and reads it from the storage device as needed. The setting unit 230 also stores pre-set setting information. The control unit 240 controls the entire terminal 20, including control related to signal transmission and reception. The signal transmission function in the control unit 240 may be included in the transmission unit 210, and the signal reception function in the control unit 240 may be included in the reception unit 220. The transmission unit 210 and the reception unit 220 may also be called the transmitter and receiver, respectively.

[0055] The terminal or base station of this embodiment may be configured as one of the terminals or base stations described in the following sections. Furthermore, the following communication methods may be implemented.

[0056] <Configuration of this embodiment> (Section 1) The terminal comprises a receiving unit that receives information from a base station indicating the activation or deactivation of intermittent cell transmission or intermittent cell reception, a control unit that generates feedback information for the information, and a transmitting unit that transmits the feedback information to the base station. (Section 2) In the terminal described in paragraph 1, the feedback information is transmitted using MAC signaling. (Section 3) In the terminal described in paragraph 1, the feedback information is HARQ-ACK information, and when the terminal operates based on a first HARQ-ACK reporting mode in which ACK or NACK is reported, if the information is detected normally, the control unit generates the HARQ-ACK information including the ACK value. (Section 4) In the terminal described in paragraph 1, the feedback information is HARQ-ACK information, and the receiving unit receives a DCI format and the terminal operates based on a second HARQ-ACK reporting mode in which only NACK is reported. If the DCI format is a DCI format indicating activation or deactivation of intermittent cell transmission or intermittent cell reception, the second HARQ-ACK reporting mode is not applied. (Section 5) The base station comprises a transmitting unit that transmits information to a terminal indicating the activation or deactivation of intermittent cell transmission or intermittent cell reception, and a receiving unit that receives feedback information from the terminal regarding the said information. (Section 6) A communication method performed by a terminal comprises the steps of: receiving information from a base station indicating the activation or deactivation of intermittent cell transmission or intermittent cell reception; generating feedback information for the information; and transmitting the feedback information to the base station.

[0057] Any of the above configurations enables feedback to the signaling for activation / deactivation of cell DTX / DRX, which allows for power saving. This ensures the reliability of the signaling for activation / deactivation of cell DTX / DRX.

[0058] (Hardware configuration) The block diagrams (Figures 9 and 10) used in the description of the above embodiments show functional units. These functional blocks (components) 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 may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may be realized by combining the one or more devices with software.

[0059] Functions include, but are not limited to, judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, assumption, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission is called a transmitting unit or transmitter. As mentioned above, the method of implementation is not particularly limited.

[0060] For example, the base station 10, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 11 is a diagram showing an example of the hardware configuration of the base station 10 and terminal 20 according to one embodiment of the present disclosure. The above-mentioned base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0061] In the following explanation, the term "device" can be replaced with "circuit," "device," "unit," etc. The hardware configuration of the base station 10 and terminal 20 may include one or more of the devices shown in the figure, or it may be configured without some of the devices.

[0062] Each function in the base station 10 and terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and storage device 1002, which allows the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of the reading and writing of data in the storage device 1002 and auxiliary storage device 1003.

[0063] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may consist of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc. For example, the control unit 140, control unit 240, etc., described above may be implemented by the processor 1001.

[0064] Furthermore, the processor 1001 reads programs (program code), software modules, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes accordingly. The program used is one that causes a computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 140 of the base station 10 shown in Figure 9 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Also, for example, the control unit 240 of the terminal 20 shown in Figure 10 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunications line.

[0065] The storage device 1002 is a computer-readable recording medium and may consist of at least one of the following: ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may also be called a register, cache, main memory, etc. The storage device 1002 can store executable programs (program code), software modules, etc., for implementing a communication method according to one embodiment of this disclosure.

[0066] The auxiliary storage device 1003 is a computer-readable recording medium and may consist of at least one of the following: an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disc, a digital multipurpose disc, a Blu-ray® disc), a smart card, flash memory (e.g., a card, a stick, a key drive), a floppy® disk, a magnetic strip, etc. The above-mentioned storage medium may also be a database, server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0067] The communication device 1004 is hardware (transceiver / receiver device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may include high-frequency switches, duplexers, filters, frequency synthesizers, etc., to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the transmit / receive antenna, amplifier section, transmit / receive section, transmission path interface, etc., may be implemented by the communication device 1004. The transmit / receive section may be implemented with physically or logically separated transmitting and receiving sections.

[0068] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, LED lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0069] Furthermore, each device, such as the processor 1001 and the storage device 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0070] Furthermore, the base station 10 and terminal 20 may 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), and an FPGA (Field Programmable Gate Array), and some or all of each functional block may be realized by such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0071] Figure 12 shows an example of the configuration of vehicle 2001. As shown in Figure 12, vehicle 2001 comprises a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in this disclosure may be applied to a communication device mounted on vehicle 2001, for example, to the communication module 2013.

[0072] The drive unit 2002 consists of, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel, which is operated by the user.

[0073] The electronic control unit 2010 consists of a microprocessor 2031, memory (ROM, RAM) 2032, and communication ports (IO ports) 2033. Signals from various sensors 2021 to 2029 installed in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0074] Signals from various sensors 2021-2029 include current signals from current sensor 2021 which senses motor current, front and rear wheel rotation speed signals obtained by rotation speed sensor 2022, front and rear wheel air pressure signals obtained by air pressure sensor 2023, vehicle speed signals obtained by vehicle speed sensor 2024, acceleration signals obtained by acceleration sensor 2025, accelerator pedal depression signals obtained by accelerator pedal sensor 2029, brake pedal depression signals obtained by brake pedal sensor 2026, shift lever operation signals obtained by shift lever sensor 2027, and detection signals obtained by object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0075] The Information Services Unit 2012 consists of various devices for providing various types of information, such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, television, and radio, and one or more ECUs that control these devices. The Information Services Unit 2012 uses information acquired from external devices via a communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.

[0076] The driver assistance system unit 2030 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 2030 also sends and receives various information via the communication module 2013 to realize driver assistance functions or autonomous driving functions.

[0077] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via its communication port. For example, the communication module 2013 sends and receives data via its communication port 2033 to the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, the microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021-29 provided in the vehicle 2001.

[0078] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station or a mobile station.

[0079] The communication module 2013 transmits current signals from current sensors input to the electronic control unit 2010 to an external device via wireless communication. The communication module 2013 also transmits, via wireless communication, other signals input to the electronic control unit 2010, including front and rear wheel rotation speed signals obtained by the rotation speed sensor 2022, front and rear wheel air pressure signals obtained by the air pressure sensor 2023, vehicle speed signals obtained by the vehicle speed sensor 2024, acceleration signals obtained by the acceleration sensor 2025, accelerator pedal depression signals obtained by the accelerator pedal sensor 2029, brake pedal depression signals obtained by the brake pedal sensor 2026, shift lever operation signals obtained by the shift lever sensor 2027, and detection signals obtained by the object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0080] The communication module 2013 receives various information (traffic information, signal information, distance information, etc.) transmitted from an external device and displays it on the information service unit 2012 installed in the vehicle 2001. The communication module 2013 also stores the various information received from the external device in memory 2032, which is available to the microprocessor 2031. Based on the information stored in memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021-2029, etc., installed in the vehicle 2001.

[0081] (Supplement to the embodiment) Although this embodiment has been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, substitutions, etc. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; matters described in two or more items may be combined as needed, and matters described in one item may be applied to matters described in another item (as long as they do not contradict each other). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operation of multiple functional units may be physically performed by one part, or the operation of one functional unit may be physically performed by multiple parts. Regarding the processing procedures described in the embodiments, the order of processing may be changed as long as it does not contradict each other. For the convenience of explaining the processing, the base station 10 and terminal 20 have been described using functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to this embodiment and the software operated by the processor of the terminal 20 according to this embodiment may be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

[0082] Furthermore, the notification of information is not limited to the embodiments / models described herein and may be carried out by other methods. For example, the notification of information may be carried out by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), upper 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 combinations thereof. Also, RRC signaling may be called RRC messages, and may be, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc.

[0083] Each aspect / embodiment described in this disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (where x is, for example, an integer or decimal)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), 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)), and IEEE This may apply to at least one system utilizing 802.20, UWB (Ultra-WideBand), Bluetooth®, or other appropriate systems, and to next-generation systems extended, modified, created, or defined based thereon. It may also apply to a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G).

[0084] The processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described herein may be reordered, provided they are consistent with each other. For example, the methods described herein present various step elements in an exemplary order and are not limited to that specific order.

[0085] In this specification, specific operations performed by the base station 10 may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having a base station 10, it is clear that various operations performed for communication with the terminal 20 can be performed by the base station 10 and at least one of the other network nodes (for example, an MME or S-GW, but not limited to these). Although the above example illustrates the case where there is one other network node besides the base station 10, the other network node may be a combination of multiple other network nodes (for example, an MME and an S-GW).

[0086] The information or signals described in this disclosure may be output from a higher layer (or lower layer) to a lower layer (or higher layer). They may also be input and output via multiple network nodes.

[0087] Input and output information may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information may be overwritten, updated, or appended to. Output information may be deleted. Input information may be transmitted to other devices.

[0088] The determination in this disclosure may be made by a value represented by one bit (0 or 1), by a boolean value (true or false), or by a numerical comparison (for example, a comparison with a predetermined value).

[0089] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0090] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0091] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0092] In addition, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and symbol may be a signal (signaling). Also, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, cell, frequency carrier, etc.

[0093] The terms “system” and “network” as used in this disclosure are interchangeable.

[0094] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a given value, or other corresponding information. For example, wireless resources may be indicated by an index.

[0095] The names used for the parameters described above are not restrictive in any way. Furthermore, the formulas and other expressions using these parameters may differ from those expressly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0096] In this disclosure, terms such as "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", and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0097] A base station can house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station can be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a Remote Radio Head (RRH)). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0098] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0099] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or several other appropriate terms.

[0100] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0101] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). In this case, the terminals 20 may have the functions that the base station 10 has. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, uplink channel, downlink channel, etc., may be interpreted as side channel.

[0102] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station may be configured to have the same functions as the user terminal described above.

[0103] As used in this disclosure, the terms “determining” and “determining” may encompass a wide variety of actions. “Determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry (e.g., searching in a table, database, or other data structure), and ascertaining. “Determining” may also include, for example, receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and accessing (e.g., accessing data in memory). Furthermore, "judgment" and "decision" can include considering something as having been "judged" or "decided" after resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment" and "decision" can include considering something as having been "judged" or "decided" after some action. Also, "judgment (decision)" can be reinterpreted as "assuming," "expecting," or "considering."

[0104] The terms “connected,” “coupled,” or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be reinterpreted as “access.” As used in this disclosure, two elements may be considered to be “connected” or “coupled” with each other using at least one of one or more wires, cables, and printed electrical connections, and, in some non-limiting and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0105] The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot depending on the applicable standard.

[0106] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0107] Any reference to elements using the designations “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, references to the first and second elements do not imply that only two elements may be employed, or that the first element must precede the second element in any way.

[0108] In the configuration of each of the above devices, "means" may be replaced with "part," "circuit," "device," etc.

[0109] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0110] A wireless frame may consist of one or more frames in the time domain. Each of these frames in the time domain may be called a subframe. A subframe may further consist of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0111] Numerical logic may be communication parameters applied to at least one of the transmission and reception of a signal or channel. Numerical logic may include, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processes performed by the transceiver in the frequency domain, and specific windowing processes performed by the transceiver in the time domain.

[0112] A slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.). A slot may also be a time unit based on neurology.

[0113] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. Minislots may also be called subslots. Minislots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0114] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Different names may be used for each of these terms.

[0115] For example, one subframe may be called a Transmission Time Interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one mini-slot may be called a TTI. In other words, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0116] Here, TTI refers to, for example, the smallest unit of time for scheduling in wireless communication. For example, in an LTE system, the base station schedules each terminal 20 to allocate wireless resources (such as the frequency bandwidth and transmission power available to each terminal 20) in TTI units. However, the definition of TTI is not limited to this.

[0117] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. Given a TTI, the actual time interval (e.g., number of symbols) to which the transport block, code block, code word, etc. are mapped may be shorter than the given TTI.

[0118] Furthermore, if one slot or one mini-slot is referred to as TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit of scheduling. In addition, the number of slots (number of mini-slots) that constitute the minimum time unit of scheduling may be controlled.

[0119] A TTI with a time length of 1ms may also be called a normal TTI, long TTI, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may also be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, mini slot, sub slot, slot, etc.

[0120] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0121] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0122] Furthermore, the time domain of the RB may contain one or more symbols and may be the length of one slot, one minislot, one subframe, or one TTI. Each TTI, subframe, etc., may consist of one or more resource blocks.

[0123] One or more RBs may also be called a Physical RB (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0124] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0125] A Bandwidth Part (BWP), also known as a partial bandwidth, may represent a subset of consecutive common resource blocks (RBs) for a particular neurology system in a given carrier. These common RBs may be identified by an index of the RBs relative to a common reference point of the carrier. A Bandwidth Part (PRB) may be defined and numbered within a given BWP.

[0126] A BWP may include a BWP for UL (Ultraviolet Link) and a BWP for DL ​​(Download Link). One or more BWPs may be set for a terminal 20 within a single carrier.

[0127] At least one of the configured BWPs may be active, and terminal 20 does not need to be expected to send or receive a predetermined signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0128] The structures described above, such as wireless frames, subframes, slots, minislots, and symbols, are merely illustrative. For example, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, and cyclic prefix (CP) length within a TTI can be varied in various ways.

[0129] In this disclosure, if articles are added through translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0130] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0131] Each aspect / embodiment described herein may be used individually, in combination, or switched between as needed during implementation. Furthermore, notification of specific information (e.g., notification that "X is") is not limited to explicit notification, but may also be implicit (e.g., by not providing such notification).

[0132] Although the present disclosure has been described in detail above, it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the intent and scope of the present disclosure as defined by the claims. Therefore, the descriptions in the present disclosure are illustrative and not intended to be restrictive in any way. [Explanation of Symbols]

[0133] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 devices 210 Transmitter 220 Receiver 230 Setting section 240 Control Unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Drive Unit 2003 Steering Department 2004 Accelerator pedal 2005 Brake pedal 2006 Shift Lever 2007 Front Wheel 2008 Rear wheel 2009 Axle 2010 Electronic Control Unit 2012 Information Services Department 2013 Communication Module 2021 Current Sensor 2022 Rotation speed sensor 2023 Pneumatic Sensor 2024 Vehicle Speed ​​Sensor 2025 Accelerometer 2026 Brake Pedal Sensor 2027 Shift lever sensor 2028 Object Detection Sensor 2029 Accelerator pedal sensor 2030 Driver Support Systems Department 2031 Microprocessor 2032 memory (ROM, RAM) 2033 Communication port (I / O port)

Claims

1. A receiving unit that receives information from the base station indicating the activation or deactivation of intermittent cell transmission or intermittent cell reception, A control unit that generates feedback information for the aforementioned information, A terminal comprising a transmitting unit that transmits the aforementioned feedback information to the base station.

2. The terminal according to claim 1, wherein the feedback information is transmitted using MAC (Medium Access Control) signaling.

3. The aforementioned feedback information is HARQ (Hybrid automatic repeat request)-ACK information, The terminal according to claim 1, wherein when the terminal operates based on a first HARQ-ACK reporting mode in which ACK or NACK is reported, if the information is detected normally, the control unit generates the HARQ-ACK information including the ACK value.

4. The aforementioned feedback information is HARQ-ACK information, The receiving unit receives the DCI (Downlink Control Information) format, The terminal according to claim 1, wherein when the terminal operates based on a second HARQ-ACK reporting mode in which only NACK is reported, the second HARQ-ACK reporting mode is not applied if the DCI format is a DCI format indicating activation or deactivation of the intermittent transmission or intermittent reception of the cell.

5. A transmitting unit that transmits information to the terminal indicating the activation or deactivation of intermittent cell transmission or intermittent cell reception, A base station comprising: a receiving unit that receives feedback information regarding the aforementioned information from the terminal.

6. A communication method performed by a terminal, The steps include receiving information from a base station indicating the activation or deactivation of intermittent cell transmission or intermittent cell reception, A step of generating feedback information for the aforementioned information, A communication method comprising the step of transmitting the feedback information to the base station.

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