Terminal and sensing method

Abstract

This terminal is provided with: a transmission unit for transmitting a sensing signal; and a control unit for stopping the transmission of the sensing signal if a prescribed trigger is detected.

Description

Terminal and sensing method

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

[0002] NR (New Radio) (also known as "5G"), the successor system to LTE (Long Term Evolution), introduces technologies that meet the requirements of a large-capacity system, high-speed data transmission, low latency, simultaneous connection of a large number of terminals, low cost, and low power consumption.

[0003] 3GPP (registered trademark) is also studying ISAC (Integrated Sensing and Communication), which uses nodes within the 3GPP (registered trademark) system to sense surrounding objects. With ISAC, there is no need to install a SIM card in the object to be sensed, and the object's position and other information are sensed by signal reflection.

[0004] 3GPP TS 38.322 V18.0.0 (2023-12)3GPP TS 38.331 V18.0.0 (2023-12)

[0005] If a terminal is a transmitter that transmits a sensing signal, there is a possibility that the sensing signal will not reach the base station if the terminal goes outside the coverage area of ​​the base station. If the sensing signal does not reach the base station, the base station can stop sensing, but the base station cannot send a signal to the terminal to stop the sensing signal. As a result, the terminal will waste power transmitting the sensing signal.

[0006] The present invention has been made in view of the above points, and has an object to provide a technique for reducing unnecessary power consumption in a terminal that transmits a sensing signal.

[0007] According to the disclosed technology, a terminal is provided that includes: a transmitter that transmits a sensing signal; and a controller that stops transmitting the sensing signal when a predetermined trigger is detected.

[0008] The disclosed technology provides a technology for reducing unnecessary power consumption in a terminal that transmits a sensing signal.

[0009] 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention. FIG. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention. FIG. 2 is a diagram for explaining an example of ISAC implementation on a 3GPP (registered trademark) system. FIG. 3 is a diagram for explaining an example of an architecture for performing sensing. FIG. 4 is a diagram for explaining an issue. FIG. 5 is a diagram for explaining an issue. FIG. 6 is a flowchart of embodiment 1-1. FIG. 7 is an existing specification referenced in embodiment 1-3. FIG. 8 is an existing specification referenced in embodiment 1-3. FIG. 9 is a flowchart of embodiment 2-1. FIG. 10 is a diagram for explaining an example of the functional configuration of a base station according to an embodiment of the present invention. FIG. 11 is a diagram for explaining an example of the functional configuration of a terminal according to an embodiment of the present invention. FIG. 12 is a diagram for explaining an example of the hardware configuration of a base station or a terminal according to an embodiment of the present invention. FIG. 13 is a diagram for explaining an example of the configuration of a vehicle according to an embodiment of the present invention.

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0011] In the operation of the wireless communication system according to the embodiment of the present invention, existing technologies are used as appropriate. However, the existing technologies are, for example, existing LTE or existing NR, but are not limited to existing LTE or NR.

[0012] In addition, in the embodiments of the present invention 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 or NR may be used. This is for convenience of description, and similar signals, functions, etc. may be called by other names.

[0013] Furthermore, in the embodiment of the present invention, the duplex method may be a time division duplex (TDD) method, a frequency division duplex (FDD) method, or another method (for example, flexible duplex, etc.).

[0014] Furthermore, in the embodiments of the present invention, "configuring" radio parameters etc. may mean that predetermined values ​​are pre-configured, or that radio parameters notified from the base station 10 or the terminal 20 are set.

[0015] (System Configuration) Fig. 1 is a diagram showing a configuration example (1) of a wireless communication system according to an embodiment of the present invention. As shown in Fig. 1, the wireless communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20. Although Fig. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each.

[0016] 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, and 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. Furthermore, a transmission time interval (TTI) in the time domain may be a slot, or 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, via NR-PBCH and is also referred to as broadcast information. The synchronization signal and system information may be referred to as SSB (SS / PBCH block). As shown in FIG. 1, the base station 10 transmits control signals or data to the terminal 20 via DL (Downlink) and receives control signals or data from the terminal 20 via UL (Uplink). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming. Furthermore, both the base station 10 and the terminal 20 are capable of applying MIMO (Multiple Input Multiple Output) communication to the DL or UL. Furthermore, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) using CA (Carrier Aggregation). Furthermore, the terminal 20 may perform communication via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 by DC (Dual Connectivity).

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

[0019] Fig. 2 is a diagram illustrating an example (2) of a wireless communication system according to an embodiment of the present invention. Fig. 2 shows an example of the configuration of a wireless communication system in which DC (Dual Connectivity) is implemented. As shown in Fig. 2, a base station 10A serving as a Master Node (MN) and a base station 10B serving as a Secondary Node (SN) are provided. The base station 10A and the base station 10B are each connected to a core network. The terminal 20 can communicate with both the base station 10A and the base station 10B.

[0020] The cell group provided by the base station 10A, which is an MN, is called an MCG (Master Cell Group), and the cell group provided by the base station 10B, which is an SN, is called an SCG (Secondary Cell Group). In addition, in DC, the MCG is composed of one PCell and one or more SCells, and the SCG is composed of one PSCell (Primary SCG Cell) and one or more SCells.

[0021] The processing operations in this embodiment may be executed in the system configuration shown in FIG. 1, in the system configuration shown in FIG. 2, or in any other system configuration.

[0022] (ISAC (Integrated Sensing And Communication)) As mentioned above, 3GPP (registered trademark) is studying ISAC, which uses nodes within the 3GPP (registered trademark) system to sense surrounding objects. Figure 3 shows an example of ISAC implementation on the 3GPP (registered trademark) system.

[0023] In ISAC, there is no need to install a SIM card in the object to be sensed; the object's location and other information are sensed by signal reflection. Both the base station 10 and the terminal 20 can function as both a transmitting node and a receiving node. Specific use cases include intruder detection in smart homes, drone flight position tracking, and object detection on public roads.

[0024] In addition, the preceding SA ISAC study in 3GPP (registered trademark) defines the following requirements (TR 22.837): "Subject to regulation and operator policy, the 5G network shall be able to activate, configure, and deactivate 5G wireless sensing based on parameters such as location and network conditions (e.g., network load)." In other words, the 5G NW can activate / configure / deactivate sensing depending on the situation. Although specific discussion of sensing deactivation has not been conducted, activation / configure / deactivation may be performed at a granularity such as per terminal 10 / base station 20 or per radio resource.

[0025] (Regarding Sensing Architecture) This embodiment deals with the case where the transmitter or receiver is the terminal 10. Examples of sensing patterns in the case where the transmitter or receiver is the terminal 10 are shown in Figs. 4 to 6. Figs. 4 to 6 show examples in which the sensing target is an object 30 (drone, etc.).

[0026] In the example shown in Fig. 4, the terminal 20 receives a sensing signal reflected from the object 30. In the example shown in Fig. 5, the terminal 20 transmits a sensing signal. In the example shown in Fig. 6, the terminal 20A transmits a sensing signal, and the terminal 20B receives the sensing signal reflected from the object 30.

[0027] (Regarding Issues) Assume a situation in which a certain terminal 20 is configured for sensing by a base station 10 and sensing is activated, and the terminal 20 goes out of the coverage of the base station 10 and is also unable to attach to another base station 10. Issues in Case 1 and Case 2 will be described below.

[0028] (1) Case 1: When the terminal 20 is a receiver As shown in Figures 7(a) and (b), in a situation where the terminal 20 receives a sensing signal reflected from an object 30, the terminal 20 goes outside the coverage of the base station 10.

[0029] It is generally assumed that the terminal 20 reports the configured sensing result to the base station 10. However, as shown in FIG. 7(b), in this case, the terminal 20 cannot report the sensing result to the base station 10.

[0030] The base station 10 can execute sensing deactivation when the terminal 20 goes out of coverage, but cannot send a deactivation instruction to the terminal 20. As a result, the terminal 20 cannot stop monitoring the configured radio resources, storing the sensing results, and reporting the sensing results. Therefore, the terminal 20 wastes power.

[0031] (2) Case 2: When the terminal 20 is the transmitter As shown in Figures 8(a), (b), and (c), when the terminal 20 is transmitting a sensing signal, the terminal 20 goes outside the coverage of the base station 10.

[0032] It is generally assumed that the terminal 20 continues to transmit the configured sensing signal. However, in this case, there is a possibility that the sensing signal will reach the base station 10 ((b) Case 2-1) or that it will not reach the base station 10 ((c) Case 2-2).

[0033] In case 2-2, the base station 10 can execute sensing deactivation, but cannot send a deactivation instruction to the terminal 20. As a result, the terminal 20 cannot stop transmitting the sensing signal using the set wireless resource. Therefore, the terminal 20 wastes power.

[0034] Hereinafter, as techniques for solving the above problems, embodiments 1 and 2 will be described. Embodiment 1 corresponds to the above case 1 and is an embodiment in which the terminal 20 functions as a receiver. Embodiment 2 corresponds to the above case 2 and is an embodiment in which the terminal 20 functions as a transmitter.

[0035] Embodiment 1 includes embodiments 1-1 to 1-3, and embodiment 2 includes embodiments 2-1 to 2-3. Each embodiment will be described below. In the following description, the "NW (network)" that performs settings on the terminal 20 may be the base station 10 or a network node other than the base station 10.

[0036] (Embodiment 1-1) In embodiment 1-1, a timer is introduced to automatically stop receiving the sensing signal. Specifically, this is as follows.

[0037] The NW sets a new timer with the following characteristics (trigger for activation / update, operation at expiration) for the terminal 20. The timer may be set for each terminal 20 or for each radio resource. The terminal 20 may also store a timer in advance without being set by the NW.

[0038] <Activation Trigger> The activation trigger occurs when the NW sets sensing for the terminal 20. That is, when the terminal 20 receives a setting from the NW so that the terminal 20 receives a sensing signal using a specific wireless resource, the terminal 20 activates the timer. Note that the activation trigger is not limited to this, and for example, the terminal 20 may activate the timer when it receives a signal from the NW instructing the terminal 20 to activate the timer.

[0039] <Update Trigger> The terminal 20 updates the timer (returns it to the initial value) when the following (1) or (2) occurs: The terminal 20 may use only one of (1) and (2) as the update trigger, or may use both (1) and (2) as the update trigger.

[0040] (1) When RRC reconfiguration is performed.

[0041] (2) When a new MAC CE for updating the timer is received from the NW.

[0042] <Operation at Time Expiration> When the terminal 20 detects that the timer has expired, it performs the following operation (1) or (2).

[0043] (1) The terminal 20 deactivates sensing. As a result of the deactivation, the following operation (2) may be performed.

[0044] (2) The terminal 20 stops sensing. More specifically, the terminal 20 executes the following operation (2-1) or (2-2).

[0045] (2-1) The terminal 20 releases the set radio resource for the sensing signal, stops monitoring the sensing signal, and stops reporting the sensing result.

[0046] (2-2) The terminal 20 releases the set wireless resource for the sensing signal and stops monitoring the sensing signal. The terminal 20 also discards the sensing result that it has stored. The terminal 20 also stops reporting the sensing result.

[0047] <Processing Flow> An example of the processing procedure of the terminal 20 will be described according to the procedure of the flowchart shown in Fig. 9. In S101, the terminal 20 is set to perform sensing from the NW. In S102, the terminal 20 starts a timer. When the timer expires (Yes in S103), in S104, the terminal 20 releases the radio resources, ends monitoring of the sensing signal, and discards the results. In addition, the terminal 20 stops reporting the sensing results.

[0048] If the timer has not expired (No in S103), the terminal 20 performs RRC reconfiguration or receives a new MAC CE in S105. In S106, the terminal 20 updates the timer.

[0049] In the embodiment 1-2, a threshold value of channel quality (reception quality) for automatically stopping sensing is introduced. The threshold value may be defined in the specifications or may be set by the base station 10 to the terminal 20 by, for example, RRC configuration.

[0050] When the terminal 20 detects that the reception quality of a received signal (for example, a reference signal emitted by the base station 10, such as a CSI RS) falls below a threshold, the terminal 20 performs the following operation (1) or (2). Note that the term "reception quality" has a broad meaning and includes received power. The "reception quality" is, for example, RSRP, RSRQ, etc.

[0051] (1) The terminal 20 deactivates sensing. As a result of the deactivation, the following operation (2) may be performed.

[0052] (2) The terminal 20 stops sensing. More specifically, the terminal 20 executes the following operation (2-1) or (2-2).

[0053] (2-1) The terminal 20 releases the set radio resource for the sensing signal, stops monitoring the sensing signal, and stops reporting the sensing result.

[0054] (2-2) The terminal 20 releases the set wireless resource for the sensing signal and stops monitoring the sensing signal. The terminal 20 also discards the sensing result that it has stored. The terminal 20 also stops reporting the sensing result.

[0055] (Embodiment 1-3) In embodiment 1-3, sensing is automatically stopped when the number of RLC retransmissions exceeds the limit. More specifically, this is as follows.

[0056] When the terminal 20 detects that the number of ARQ retransmissions in the RLC (Radio Link Control) layer has reached its upper limit, the terminal 20 performs the following operation (1) or (2). Note that the existing specifications (TS38.322, TS38.331) describe the operation of the terminal 20 when it detects that the number of ARQ retransmissions in the RLC layer has reached its upper limit (underlined portions in FIGS. 10 and 11 ), and the terminal 20 may perform the following operation (1) or (2) in addition to the operation specified in the existing specifications.

[0057] (1) The terminal 20 deactivates sensing. As a result of the deactivation, the following operation (2) may be performed.

[0058] (2) The terminal 20 stops sensing. More specifically, the terminal 20 executes the following operation (2-1) or (2-2).

[0059] (2-1) The terminal 20 releases the set radio resource for the sensing signal, stops monitoring the sensing signal, and stops reporting the sensing result.

[0060] (2-2) The terminal 20 releases the set wireless resource for the sensing signal and stops monitoring the sensing signal. The terminal 20 also discards the sensing result that it has stored. The terminal 20 also stops reporting the sensing result.

[0061] (Effects of First Embodiment) According to the first embodiment, the terminal 20 can automatically stop monitoring the sensing signal when the terminal 20 is outside the coverage of the base station 10. This can reduce unnecessary power consumption of the terminal 20.

[0062] (Embodiment 2-1) In embodiment 2-1, a timer is introduced to automatically stop the transmission of the sensing signal. Specifically, this is as follows.

[0063] The NW sets a new timer for the terminal 20, which has the following characteristics (trigger for activation / update, operation at expiration). The timer may be set for each terminal 20 or for each radio resource. The terminal 20 may also hold a timer in advance without setting the timer in the NW.

[0064] <Activation Trigger> The activation trigger occurs when the NW sets sensing for the terminal 20. That is, when the terminal 20 receives a setting from the NW so that the terminal 20 transmits or receives a sensing signal using a specific wireless resource, the terminal 20 activates the timer. Note that the activation trigger is not limited to this, and for example, the terminal 20 may activate the timer when it receives a signal from the NW instructing the terminal 20 to activate the timer.

[0065] <Update Trigger> The terminal 20 updates the timer (returns it to the initial value) when the following (1) or (2) occurs: The terminal 20 may use only one of (1) and (2) as the update trigger, or may use both (1) and (2) as the update trigger.

[0066] (1) When RRC reconfiguration is performed.

[0067] (2) When a new MAC CE for updating the timer is received from the NW.

[0068] <Operation at Time Expiration> When the terminal 20 detects that the timer has expired, it performs the following operation (1) or (2).

[0069] (1) The terminal 20 deactivates sensing. As a result of the deactivation, the following operation (2) may be performed.

[0070] (2) The terminal 20 stops transmitting the sensing signal. More specifically, the terminal 20 releases the set wireless resource for the sensing signal and stops transmitting the sensing signal.

[0071] <Processing Flow> An example of the processing procedure of the terminal 20 will be described along the procedure of the flowchart shown in Fig. 12. In S201, the terminal 20 is set to perform sensing from the NW. In S202, the terminal 20 starts a timer. When the timer expires (Yes in S203), in S204, the terminal 20 releases the wireless resource and ends transmission of the sensing signal.

[0072] If the timer has not expired (No in S203), the terminal 20 performs RRC reconfiguration or receives a new MAC CE in S205. In S206, the terminal 20 updates the timer.

[0073] In the embodiment 2-2, a threshold value of channel quality (reception quality) for automatically stopping transmission of a sensing signal is introduced. The threshold value may be defined in the specifications or may be set by the base station 10 to the terminal 20 by, for example, RRC configuration.

[0074] When the terminal 20 detects that the reception quality of a received signal (for example, a reference signal emitted by the base station 10, such as a CSI RS) falls below a threshold, the terminal 20 performs the following operation (1) or (2). Note that the term "reception quality" has a broad meaning and includes received power. The "reception quality" is, for example, RSRP, RSRQ, etc.

[0075] (1) The terminal 20 deactivates sensing. As a result of the deactivation, the following operation (2) may be performed.

[0076] (2) The terminal 20 stops transmitting the sensing signal. More specifically, the terminal 20 releases the set wireless resource for the sensing signal and stops transmitting the sensing signal.

[0077] (Embodiment 2-3) In embodiment 2-3, the transmission of a sensing signal is automatically stopped when the number of RLC (Radio Link Control) retransmissions exceeds the limit. More specifically, this is as follows.

[0078] When the terminal 20 detects that the number of ARQ retransmissions in the RLC layer has reached the upper limit, the terminal 20 performs the following operation (1) or (2). Note that the existing specifications (TS38.322, TS38.331) describe the operation of the terminal 20 when it detects that the number of ARQ retransmissions in the RLC layer has reached the upper limit (the underlined parts in the above-mentioned Figures 10 and 11), and the terminal 20 may perform the following operation (1) or (2) in addition to the operation specified in the existing specifications.

[0079] (1) The terminal 20 deactivates sensing. As a result of the deactivation, the following operation (2) may be performed.

[0080] (2) The terminal 20 stops transmitting the sensing signal. More specifically, the terminal 20 releases the set wireless resource for the sensing signal and stops transmitting the sensing signal.

[0081] (Effects of the Second Embodiment) According to the second embodiment, the terminal 20 can automatically stop transmitting a sensing signal when the terminal 20 is outside the coverage of the base station 10. This can reduce unnecessary power consumption of the terminal 20.

[0082] (Variation 1) The threshold in embodiment 1-2 and the threshold in embodiment 2-2 may be the same or different. Furthermore, the terminal 20 may use the threshold set from the NW in embodiment 1-2 in embodiment 2-2 in addition to using it in embodiment 1-2. Furthermore, the terminal 20 may use the threshold set from the NW in embodiment 2-2 in embodiment 1-2 in addition to using it in embodiment 2-2.

[0083] (Variation 2) Two or all of the embodiments 1-1 to 1-3 may be combined within embodiment 1. For example, by combining embodiments 1-1 to 1-3, the terminal 20 may stop monitoring the sensing signal when it detects a trigger in embodiment 1-2 or embodiment 1-3, even before the timer expires.

[0084] Furthermore, two or all of the embodiments 2-1 to 2-3 may be combined within embodiment 2. For example, by combining embodiments 2-1 to 2-3, the terminal 20 may stop transmitting the sensing signal when it detects a trigger of embodiment 2-2 or embodiment 2-3, even before the timer expires.

[0085] Furthermore, any embodiment in the first embodiment may be combined with any embodiment in the second embodiment.

[0086] (Device Configuration) Next, a description will be given of an example of the functional configuration of the base station 10 and the terminal 20 that execute the processes and operations described above. Note that the base station 10 is an example of the NW described above.

[0087] <Base Station 10> Fig. 13 is a diagram showing an example of the functional configuration of the base station 10. As shown in Fig. 13, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Fig. 13 is merely an example. As long as the operations related to the embodiment of the present invention can be performed, the names of the functional divisions and functional units may be any. Furthermore, the transmitting unit 110 and the receiving unit 120 may be collectively referred to as a communication unit.

[0088] The transmitter 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The receiver 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signal. The transmitter 110 also has a function of transmitting, to the terminal 20, NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DCI via PDCCH, data via PDSCH, and the like.

[0089] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in a storage device provided in the setting unit 130, and reads out the information from the storage device as needed.

[0090] The control unit 140 controls the base station 10. The functional units in the control unit 140 related to signal transmission may be included in the transmitting unit 110, and the functional units in the control unit 140 related to signal reception may be included in the receiving unit 120. Alternatively, the transmitting unit 110 may be called a transmitter, and the receiving unit 120 may be called a receiver.

[0091] <Terminal 20> Fig. 14 is a diagram showing an example of the functional configuration of the terminal 20. As shown in Fig. 14, the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Fig. 14 is merely an example. As long as the operations related to the embodiment of the present invention can be performed, the names of the functional divisions and functional units may be any. The transmitting unit 210 and the receiving unit 220 may be collectively referred to as a communication unit.

[0092] The transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiver 220 receives various signals wirelessly and acquires higher layer signals from the received physical layer signals. The receiver 220 also has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, DCI via PDCCH, data via PDSCH, etc. transmitted from the base station 10. Furthermore, for example, the transmitting unit 210 may transmit a PSCCH (Physical Sidelink Control Channel), a PSSCH (Physical Sidelink Shared Channel), a PSDCH (Physical Sidelink Discovery Channel), a PSBCH (Physical Sidelink Broadcast Channel), or the like to another terminal 20 as D2D communication, and the receiving unit 120 may receive the PSCCH, the PSSCH, the PSDCH, the PSBCH, or the like from the other terminal 20.

[0093] The setting unit 230 stores various setting information received from the base station 10 or other terminals by the receiving unit 220 in a storage device provided in the setting unit 230, and reads it from the storage device as needed. The setting unit 230 also stores setting information that is set in advance. The control unit 240 controls the terminal 20.

[0094] This specification discloses at least the matters described in Supplementary Notes 1 and 2 below.

[0095] <Supplementary Item 1> (Supplementary Item 1) A terminal comprising: a receiving unit that receives a sensing signal; and a control unit that, when a predetermined trigger is detected, stops monitoring the sensing signal and stops reporting of a sensing result. (Supplementary Item 2) The terminal according to Supplementary Item 1, wherein the control unit discards the stored sensing result when the predetermined trigger is detected. (Supplementary Item 3) The terminal according to Supplementary Item 1, wherein the predetermined trigger is expiration of a timer. (Supplementary Item 4) The terminal according to Supplementary Item 1, wherein the predetermined trigger is when signal reception quality falls below a threshold. (Supplementary Item 5) The terminal according to Supplementary Item 1, wherein the predetermined trigger is when the number of retransmissions in an RLC layer reaches an upper limit. (Supplementary Item 6) A sensing method executed by a terminal, comprising: a step of receiving a sensing signal; and a step of, when a predetermined trigger is detected, stopping monitoring the sensing signal and stopping reporting of a sensing result.

[0096] Any of the configurations described above provides a technique for reducing unnecessary power consumption in a terminal receiving a sensing signal. According to supplementary item 2, retained sensing results are discarded, so that reporting of old sensing results can be avoided, for example, when entering coverage. According to supplementary item 3, a timer is used, so that stopping of monitoring can be reliably performed. According to supplementary item 4, reception quality is used, so that a quick determination can be made. According to supplementary item 5, the number of retransmissions in the RLC layer is used, so that link degradation (e.g., going out of coverage) can be accurately detected.

[0097] <Supplementary Item 2> (Supplementary Item 1) A terminal comprising: a transmitter that transmits a sensing signal; and a controller that stops transmission of the sensing signal when a predetermined trigger is detected. (Supplementary Item 2) The terminal according to Supplementary Item 1, wherein the predetermined trigger is expiration of a timer. (Supplementary Item 3) The terminal according to Supplementary Item 1, wherein the predetermined trigger is that signal reception quality falls below a threshold. (Supplementary Item 4) The terminal according to Supplementary Item 1, wherein the predetermined trigger is that the number of retransmissions in an RLC layer reaches an upper limit. (Supplementary Item 5) A sensing method executed by a terminal, comprising: transmitting a sensing signal; and stopping transmission of the sensing signal when a predetermined trigger is detected.

[0098] Any of the configurations described above provides a technique for reducing unnecessary power consumption in a terminal that transmits a sensing signal. According to supplementary item 2, a timer is used, so that the transmission of the sensing signal can be stopped reliably. According to supplementary item 3, reception quality is used, so that a quick determination can be made. According to supplementary item 4, the number of retransmissions in the RLC layer is used, so that link degradation (e.g., going out of coverage) can be detected with high accuracy.

[0099] (Hardware Configuration) The block diagrams (FIGS. 13 and 14) used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining software with the single device or the multiple devices.

[0100] Functions include, but are not limited to, judgment, determination, assessment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0101] For example, the base station 10, the terminal 20, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 15 is a diagram illustrating an example of the hardware configuration of the base station 10 and the terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 described above may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0102] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0103] Each function in the base station 10 and the terminal 20 is realized by loading specified software (programs) onto hardware such as the processor 1001, the memory device 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls at least one of reading and writing data in the memory device 1002 and the auxiliary memory device 1003.

[0104] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 140, control unit 240, etc. may be realized by the processor 1001.

[0105] Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002 and executes various processes in accordance with the programs. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 140 of the base station 10 shown in FIG. 13 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. Furthermore, for example, the control unit 240 of the terminal 20 shown in FIG. 14 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may also be transmitted from a network via a telecommunications line.

[0106] The storage device 1002 is a computer-readable recording medium and may be configured, for example, by at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), etc. The storage device 1002 may also be called a register, a cache, a main memory, etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.

[0107] The secondary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc. The above-mentioned storage medium may be, for example, a database, a server, or other appropriate medium including at least one of the storage device 1002 and the secondary storage device 1003.

[0108] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, a transmission / reception antenna, an amplifier unit, a transmission / reception unit, a transmission path interface, etc. may be realized by the communication device 1004. The transmission / reception unit may be implemented as a transmission unit and a reception unit that are physically or logically separated.

[0109] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0110] Furthermore, each device, such as the processor 1001 and the storage device 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0111] Furthermore, the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0112] Fig. 16 shows an example configuration of a vehicle 2001. As shown in Fig. 16, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. The terminal 20 or the base station 10 according to each aspect / embodiment described in the present disclosure may be applied to a communication device mounted on the vehicle 2001, and may be applied to the communication module 2013, for example.

[0113] The drive unit 2002 is configured, for example, by an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0114] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0115] The signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front and rear wheels obtained by a rotation speed sensor 2022, an air pressure signal of the front and rear wheels obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0116] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing various types of information such as driving information, traffic information, and entertainment information, as well as one or more ECUs for controlling these devices. The information service unit 2012 provides various types of multimedia information and multimedia services to the occupants of the vehicle 2001 by using information acquired from external devices via the communication module 2013 or the like. The information service unit 2012 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that output information to the outside.

[0117] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driving burden on the driver, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS, etc.), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. In addition, the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0118] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided in the vehicle 2001.

[0119] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station, a mobile station, etc. When the terminal 20 or the base station 10 is included in the communication module 2013, the communication module 2013 can perform the operations described in the first and second embodiments.

[0120] The communication module 2013 may transmit at least one of signals from the above-mentioned various sensors 2021-2028 input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above-mentioned input.

[0121] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle-to-vehicle information, etc.) transmitted from external devices and displays it on an information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 2013). The communication module 2013 also stores the various information received from external devices in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.

[0122] (Supplementary Notes on the Embodiments) Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; matters described in two or more items may be used in combination as needed, and matters described in one item may apply to matters described in another item (as long as there is no contradiction). Boundaries between functional units or processing units in functional block diagrams do not necessarily correspond to boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 have been described using functional block diagrams, but such devices may be realized by hardware, software, or a combination thereof. The software operated by the processor of the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

[0123] Furthermore, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling), broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0124] Each aspect / embodiment described in the present disclosure may be implemented using any of the following standards: LTE (Long Term Evolution), LTE-Advanced (LTE-A), 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 (x is, for example, an integer or a decimal number)), 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)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802.34 ( The present invention may be applied to at least one of systems using 802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), or other suitable systems, and next-generation systems that are extended, modified, created, or defined based on these systems. The present invention may also be applied to a combination of multiple systems (e.g., a combination of LTE and / or LTE-A with 5G).

[0125] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described herein may be rearranged unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order and are not limited to the particular order presented.

[0126] In this specification, a specific operation described as being performed by the base station 10 may be performed by its upper node in some cases. In a network consisting of one or more network nodes having the base station 10, it is clear that various operations performed for communication with the terminal 20 may be performed by at least one of the base station 10 and another network node other than the base station 10 (such as, but not limited to, an MME or an S-GW). Although the above example illustrates a case where there is one other network node other than the base station 10, the other network node may be a combination of multiple other network nodes (such as an MME and an S-GW).

[0127] The information, signals, etc. described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input / output via multiple network nodes.

[0128] Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be transmitted to another device.

[0129] In the present disclosure, the determination may be made by a value represented by one bit (0 or 1), by a Boolean value (true or false), or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0130] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0131] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0132] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0133] Note that terms described in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0134] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0135] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by an index.

[0136] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0137] In the present disclosure, terms such as "base station (BS)," "radio 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. A base station may also be referred to by terms such as a macrocell, a small cell, a femtocell, and a picocell.

[0138] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication services within that coverage.

[0139] In the present disclosure, the base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.

[0140] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0141] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0142] At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, etc. The mobile object refers to a movable object, and may move at any speed. Naturally, this also includes cases where the mobile object is stationary. Examples of the mobile object include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon. The mobile object may also be a mobile object that moves autonomously based on an operational command. The mobile object may also be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0143] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0144] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station may be configured to have the functions of the user terminal described above.

[0145] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0146] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0147] The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.

[0148] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0149] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0150] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0151] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0152] A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0153] Numerology may be communication parameters that apply to the transmission and / or reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, specific windowing operations performed by the transceiver in the time domain, etc.

[0154] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may be a time unit based on numerology.

[0155] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0156] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0157] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, or the like instead of a subframe. Furthermore, one slot may be called a unit time. The unit time may differ for each cell depending on the numerology.

[0158] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units. Note that the definition of TTI is not limited to this.

[0159] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0160] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0161] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0162] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and greater than or equal to 1 ms.

[0163] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0164] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0165] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0166] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0167] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0168] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be set for the terminal 20 within one carrier.

[0169] At least one of the configured BWPs may be active, and the terminal 20 may not expect to transmit or receive a predetermined signal / channel outside the active BWP. Note that the terms "cell," "carrier," and the like in this disclosure may be read as "BWP."

[0170] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples, and various changes may be made to the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc.

[0171] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0172] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0173] The aspects / embodiments described in this disclosure may be used alone, in combination, or switched depending on the implementation. Notification of predetermined information (e.g., notification that "X is true") is not limited to explicit notification, but may be implicit (e.g., not notifying the predetermined information).

[0174] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure.

[0175] 10 Base station 110 Transmitter 120 Receiver 130 Setting unit 140 Control unit 20 Terminal 210 Transmitter 220 Receiver 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Drive unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Front wheels 2008 Rear wheels 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication module 2021 Current sensor 2022 Rotation speed sensor 2023 Tire pressure sensor 2024 Vehicle speed sensor 2025 Acceleration sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor 2030 Driving assistance system unit 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port (IO port)

Claims

1. A terminal comprising: a transmitting unit that transmits a sensing signal; and a control unit that stops transmitting the sensing signal when a predetermined trigger is detected.

2. The terminal according to claim 1, wherein the predetermined trigger is the expiration of a timer.

3. The terminal according to claim 1, wherein the predetermined trigger is when the signal reception quality falls below a threshold.

4. The terminal according to claim 1, wherein the predetermined trigger is when the number of retransmissions in the RLC layer reaches an upper limit.

5. A sensing method executed by a terminal, comprising: a step of transmitting a sensing signal; and a step of stopping the transmission of the sensing signal when a predetermined trigger is detected.

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