Terminal and communication method

Abstract

To allow the transmission of a plurality of channels to be controlled based on directional LBT (Listen Before Talk) using a plurality of beams in a wireless communication system.SOLUTION: A terminal includes a receiving unit that performs LBT (Listen Before Talk) to execute sensing that applies each of a plurality of reception beams corresponding to a plurality of transmission beams applied to transmission of a plurality of uplink shared channels in COT (Channel Occupancy Time), a control unit that determines whether the transmission of the plurality of uplink shared channels satisfies a certain condition, and a transmitting unit that performs transmission of the plurality of uplink shared channels if the certain condition is satisfied and if all of the plurality of reception beams are successful in LBT.SELECTED DRAWING: Figure 6

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

[0003] In NR Release 17, it is being studied to use a higher frequency band than in conventional releases (for example, Non-Patent Document 2). For example, applicable numerologies including subcarrier spacing and channel bandwidth, physical layer design, and obstacles assumed in actual wireless communication in the frequency band from 52.6 GHz to 71 GHz are being studied.

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

Non-Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a newly operated frequency band, directional Listen Before Talk (LBT) that applies a beam to sensing is being studied. Here, when performing directional LBT using a plurality of beams, it is necessary to determine how to execute the transmission of a plurality of channels to which a plurality of beams are applied based on the result of the LBT.

[0006] The present invention has been made in view of the above points, and in a wireless communication system, it is possible to control the transmission of a plurality of channels based on directional Listen Before Talk (LBT) using a plurality of beams.

Means for Solving the Problem

[0007] According to the disclosed technique, a receiving unit that performs Listen Before Talk (LBT) to execute sensing for applying each of a plurality of receiving beams corresponding to a plurality of transmission beams applied to the transmission of a plurality of uplink shared channels in Channel Occupancy Time (COT), a control unit that determines whether the transmission of the plurality of uplink shared channels satisfies a certain condition, and when the certain condition is satisfied and all of the plurality of receiving beams succeed in LBT, a terminal having a transmitting unit that executes the transmission of the plurality of uplink shared channels is provided.

Effect of the Invention

[0008] According to the disclosed technique, in a wireless communication system, it is possible to control the transmission of a plurality of channels based on directional Listen Before Talk (LBT) using a plurality of beams.

Brief Description of the Drawings

[0009]

Figure 1

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Figure 15

Embodiments for Carrying Out the Invention

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

[0011] In the operation of the wireless communication system according to the embodiment of the present invention, existing technologies are appropriately used. However, the existing technology is, for example, existing LTE, but is not limited to existing LTE. In addition, the term "LTE" used in this specification shall have a broad meaning including LTE-Advanced and subsequent systems (e.g., NR) unless otherwise specified.

[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 are used. This is for convenience of description, and signals, functions, etc. similar to these may be called by other names. In addition, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even for signals used in NR, the "NR-" is not necessarily specified.

[0013] In addition, in the embodiments of the present invention, the duplex mode may be a TDD (Time Division Duplex) mode, an FDD (Frequency Division Duplex) mode, or other modes (e.g., Flexible Duplex, etc.).

[0014] In addition, in the embodiments of the present invention, the phrase "configured" for wireless parameters or the like may mean that predetermined values are pre-configured, or that wireless parameters notified from the base station 10 or the terminal 20 are configured.

[0015] FIG. 1 is a diagram showing a configuration example 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 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 wireless communication with the terminal 20. The physical resources of the wireless signal are defined in the time domain and the frequency domain. The time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. The base station 10 transmits the synchronization signal and the system information to the terminal 20. The synchronization signal is, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, by NR-PBCH and is also referred to as broadcast information. The synchronization signal and the system information may be referred to as SSB (SS / PBCH block). As shown in FIG. 1, the base station 10 transmits the control signal or data to the terminal 20 in the DL (Downlink) and receives the control signal or data from the terminal 20 in the UL (Uplink). Both the base station 10 and the terminal 20 are capable of performing beamforming for signal transmission and reception. Also, both the base station 10 and the terminal 20 are capable of applying communication by MIMO (Multiple Input Multiple Output) to the DL or UL. Also, 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) by CA (Carrier Aggregation). Further, the terminal 20 may communicate via the primary cell of the base station 10 and the primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 by DC (Dual Connectivity).

[0017] 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, a communication module for M2M (Machine-to-Machine), etc. As shown in FIG. 1, the terminal 20 receives a control signal or data from the base station 10 in the DL and transmits a control signal or data to the base station 10 in the UL, thereby using various communication services provided by the wireless communication system. Further, the terminal 20 receives various reference signals transmitted from the base station 10 and performs measurement of the propagation path quality based on the reception result of the reference signal.

[0018] FIG. 2 is a diagram showing an example of a frequency range in the embodiment of the present invention. In the NR specifications of 3GPP Release 15 and Release 16, for example, it is considered to operate in a frequency band of 52.6 GHz or higher. As shown in FIG. 2, the currently defined FR (Frequency range) 1 is a frequency band from 410 MHz to 7.125 GHz, the SCS (Sub carrier spacing) is 15, 30, or 60 kHz, and the bandwidth is from 5 MHz to 100 MHz. FR2 is a frequency band from 24.25 GHz to 52.6 GHz, the SCS uses 60, 120, or 240 kHz, and the bandwidth is from 50 MHz to 400 MHz. For example, the newly operated frequency band may be assumed to be from 52.6 GHz to 71 GHz. Further, it may be assumed to support a frequency band exceeding 71 GHz.

[0019] In the new frequency band operated in 3GPP Release 17, in order to comply with the regulatory requirements applicable to the unlicensed band, a beam-based channel access mechanism is assumed. For example, both access by LBT (Listen before talk) and access without LBT may be adopted. In the case of access without LBT, an additional sensing mechanism may not be adopted. Also, omni-directional LBT, directional LBT, and receiver-side assistance may be adopted. Also, enhancement related to the power detection threshold may be executed. Hereinafter, omni-directional LBT is also referred to as omni LBT.

[0020] Figure 3 is a diagram for explaining an example of LBT. For example, in the frequency band from 52.6 GHz to 71 GHz, the CCA (Clear Channel Assessment) procedure may be defined as the detection period of the channel by a period of 8 microseconds + 5 microseconds × random counter as shown in Figure 3. Figure 3 shows an example where in the first LBT, the random counter is 3, and 8 + 5 × 3 = 23 microseconds is the detection period of the channel, and channel busy is detected in the detection period from 14 microseconds to 18 microseconds.

[0021] Also, in Figure 3, the second LBT starts from the state where the random counter in which channel busy was detected in the first LBT is 2, 8 + 5 × 2 = 18 microseconds is the detection period of the channel, and since channel busy was not detected in the detection period, an example where transmission is started is shown.

[0022] Note that COT (Channel Occupancy Time) sharing may or may not be supported. Also, within one COT, LBT by other terminals applying backoff and random counters may be executed, which may be the same as when starting the CCA procedure. Also, within one COT, LBT by other terminals not applying backoff and random counters may be executed, which may be the same as type 2 LBT in NR-U. Also, within one COT, LBT by other terminals may not be executed.

[0023] In NR 52.6 - 71 GHz, since beam-based transmission and reception are widely used, directional LBT applying a beam to sensing may be supported to improve the success rate of LBT. Hereinafter, directional LBT is also simply referred to as LBT.

[0024] For example, LBT corresponding to a COT applying multiple beams for MU-MIMO (Multi User MIMO) or SDM (Spatial division multiplexing) transmission may be supported. For example, a COT applying multiple beams may be obtained by single LBT using a wide sensing beam or by LBT for each beam. Note that a sensing beam is a beam applied to sensing in LBT, and may also be denoted as an eCCA (enhanced CCA) beam. Also, succeeding in LBT or eCCA may mean that no busy state is detected as a result of performing sensing by applying a certain beam, and failing in LBT or eCCA may mean that a busy state is detected as a result of performing sensing by applying a certain beam.

[0025] Also, within the COT that applies time-division multiplexed beams by beam switching, a single LBT that applies a wide beam covering all the beams used in the COT may be executed with an appropriate power detection threshold, or LBT sensing may be executed at the start of the COT independently for each beam used in the COT, or LBT sensing may be executed at the start of the COT by adding the requirements of Category 2 LBT independently for each beam used in the COT. Note that Category 2 LBT may be LBT without random backoff.

[0026] Note that applying a beam in LBT may mean applying a receiving beam or receiving beamforming. An LBT may be executed that applies a receiving beam or receiving beamforming corresponding to the transmitting beam or transmitting beamforming applied to transmission in the COT. Transmission may be executed in the COT by applying the transmitting beam or transmitting beamforming corresponding to the receiving beam or receiving beamforming that has succeeded in sensing in the LBT. Note that a certain beam being wider than another beam, covering or including another beam may be defined as the certain beam covering at least the direction in the space of the other beam, or may be defined otherwise.

[0027] Also, when LBT sensing for each beam is executed during MU-MIMO transmission, it may operate as shown in 1)-4) below.

[0028] 1) When LBT for each beam is executed in time-division multiplexing, after completing eCCA for a certain beam, execute eCCA for other beams, and do not execute transmission between eCCAs. 2) When LBT for each beam is executed in time-division multiplexing, after completing 1eCCA for a certain beam, execute transmission applying the beam in the COT. Then, execute eCCA for other beams. 3) When LBT for each beam is executed in time-division multiplexing, eCCA for different beams may be executed simultaneously in a round-robin manner. 4) When LBT for each of a plurality of different beams is executed simultaneously in parallel, it may be assumed that the node has the ability to sense a plurality of different beams simultaneously.

[0029] FIG. 4 is a diagram for explaining an example of the hidden terminal problem. The channel power detected at the transmitting node and the receiving node related to the directional LBT may be different. As shown in FIG. 4, when the gNB directs a directional LBT beam to UE1, UE1 receives an interference beam from a wireless LAN node that cannot be detected by the gNB, so a hidden terminal problem occurs at UE1.

[0030] Considering the hidden terminal problem, for example, the receiving node may perform and report legacy RSSI (Received Signal Strength Indicator) measurements. Also, the receiving node may perform AP-CSI (Aperiodic Channel state information) reporting. Also, the receiving node may perform eCCA or may perform category 2 LBT.

[0031] Here, for the beams used within a COT in which MU-MIMO transmission is performed, it is being considered to perform independent per-beam LBT (Independent per-beam LBT) sensing for each beam at the start of the COT. Also, when performing beam switching by time-division multiplexing the beams, before switching the beams, for the beams used within the COT, it is being considered to perform independent per-beam LBT sensing that applies additional requirements to category 2 LBT at the start of the COT.

[0032] Also, for the beams used within a COT in which MU-MIMO transmission is performed, when the node is capable of performing simultaneous sensing for different beams, it is being considered to perform independent per-beam LBT sensing for each beam at the start of the COT.

[0033] For example, when the gNB or UE can sense different beams simultaneously, for each sensing beam covering the transmission beam within the COT, a type 1 channel access procedure may be applied at the start point of the COT.

[0034] FIG. 5 is a diagram for explaining an example (1) of transmission in an embodiment of the present invention. As shown in FIG. 5, when simultaneously sensing a plurality of beams intended for transmission and performing LBT for each independent beam, all transmissions of the beams that have succeeded in the corresponding LBT procedure before the start point of the COT are permitted. For example, as shown in FIG. 5, the transmission within the COT corresponding to the beam that has failed in the LBT procedure is not executed.

[0035] FIG. 6 is a diagram for explaining an example (2) of transmission in an embodiment of the present invention. When the target UL transmission is a repeated transmission of PUCCH or PUSCH for a plurality of TRPs (Transmission and reception point) scheduled by a single DCI, the repeated transmission may be permitted when the LBT procedures for all beams have succeeded. As shown in FIG. 6, when transmissions 2 and 3 are repeated transmissions of PUCCH or PUSCH, if the LBT fails for any one of the beams (beam #C in FIG. 6), it may not be necessary to execute both transmissions 2 and 3. By the above operation, an increase in the decoding load on the gNB side can be avoided.

[0036] FIG. 7 is a diagram for explaining an example (1) of PUSCH transmission for a plurality of TRPs in an embodiment of the present invention. The repeated transmission of PUCCH or PUSCH for a plurality of TRPs scheduled by a single DCI may be denoted as single DCI mTRP PUCCH / PUSCH transmission. The repeated transmission of PUCCH or PUSCH can be transmitted to different TRPs.

[0037] As shown in FIG. 7, two SRS-ResourceSets are configured for the codebook (CB) and non-codebook (NCB) by RRC signaling. Two power control parameters are configured by RRC signaling. Two SRI (SRS resource indicator) fields, two PTRS-DMRS fields, and two TPC fields are notified by DCI.

[0038] FIG. 8 is a diagram for explaining an example (2) of PUSCH transmission for a plurality of TRPs in an embodiment of the present invention. FIG. 8 is an example in which 4 code points are set in the SRS-ResourceSet indicator field. The S(Single)-TRP and M(Multiple)-TRP can be dynamically switched by the SRS-ResourceSet indicator field included in the DCI. As shown in FIG. 8, code point 0 corresponds to TRP1, code point 1 corresponds to TRP2, code point 2 corresponds to TRP1 and TRP2, and code point 3 corresponds to TRP2 and TRP1.

[0039] In the case of PUSCH, as shown in FIG. 7, two SRS-ResourceSets (with usage set to codebook (CB) or non-codebook (NCB)) are configured by RRC signaling. Each SRS-ResourceSet corresponds to a different TRP. When mTRP-PUSCH transmission is scheduled by 1 DCI, 2 SRIs are notified by the DCI. That is, 1 SRI is notified for each SRS-ResourceSet. By applying one of the 2 SRIs to each PUSCH repetition, different beams are applied to each PUSCH repetition. That is, it is transmitted to different TRPs.

[0040] FIG. 9 is a diagram for explaining an example of PUCCH transmission for a plurality of TRPs in an embodiment of the present invention. As shown in FIG. 9, for M-TRP PUCCH in FR2, two beams are activated by MAC-CE for one PUCCH resource. Also, for M-TRP PUCCH in FR1, two power control parameters are activated by MAC-CE for one PUCCH resource.

[0041] In the case of PUCCH in FR2, PUCCH-SpatialRelationInfo, which is a parameter used for setting a path loss reference signal or the like for determining a PUCCH beam, is set by 64 types of RRC signaling, and two of them are selected, i.e., activated, by MAC-CE. By applying either of the two PUCCH-SpatialRelationInfo selected by MAC-CE, different beams are applied for each PUCCH repeated transmission. That is, they are transmitted to different TRPs.

[0042] When multiple PUSCH transmissions are transmitted with different beams on an unlicensed band in the 52.6 - 71 GHz band, if the PUSCH is a transmission for multiple TRPs scheduled by a single DCI, it is desirable for the UE to execute multiple PUSCH transmissions when LBT is successful for all the beams applied to the multiple PUSCHs.

[0043] On the other hand, when the PUSCH is not a transmission for multiple TRPs scheduled by a single DCI, if LBT is successful only for some of the beams among the beams applied to multiple PUSCH transmissions and other uplink transmissions, it is desirable for the UE to transmit PUSCH and other uplink transmissions related only to the beams for which LBT was successful.

[0044] Also, when multiple PUCCH transmissions are sent on an unlicensed band in the 52.6 - 71 GHz band using different beams, if the PUCCH is a transmission for multiple TRPs scheduled by a single DCI, it is desirable for the UE to perform multiple PUCCH transmissions when LBT is successful for all the beams applied to the multiple PUCCHs.

[0045] On the other hand, when the PUCCH is not a transmission for multiple TRPs scheduled by a single DCI, if LBT is successful only for some of the beams among the beams applied to multiple PUCCH transmissions and other uplink transmissions, it is desirable for the UE to send the PUCCH and other uplink transmissions related only to the beams for which LBT was successful.

[0046] Here, it was unclear how to define whether the PUSCH or the PUCCH is a transmission for multiple TRPs scheduled by a single DCI.

[0047] Therefore, when the UE sends multiple PUSCH transmissions on an unlicensed band in the 52.6 - 71 GHz band using different beams, if an independent per - beam LBT is pre - operated for each beam and the PUSCH is transmitted to multiple TRPs, the UE may start the multiple PUSCH transmissions only when LBT is successful for all the relevant beams.

[0048] Also, when the UE sends multiple PUCCH transmissions on an unlicensed band in the 52.6 - 71 GHz band using different beams, if an independent per - beam LBT is pre - operated for each beam and the PUCCH is transmitted to multiple TRPs, the UE may start the multiple PUCCH transmissions only when LBT is successful for all the relevant beams.

[0049] FIG. 10 is a flowchart for explaining an example of PUSCH transmission for a plurality of TRPs in an embodiment of the present invention. In step S11, when the UE transmits a plurality of PUSCHs using a plurality of beams on an unlicensed band, it performs LBT independently for each beam in advance. In the subsequent step S12, the UE determines whether the PUSCH is to be transmitted to a plurality of TRPs. Note that the UE may determine whether the plurality of PUSCHs are to be transmitted to a plurality of TRPs. If the PUSCH is to be transmitted to a plurality of TRPs, the process proceeds to step S13. If the PUSCH is not to be transmitted to a plurality of TRPs, the process proceeds to step S14.

[0050] In step S13, the UE determines whether it has succeeded in LBT for all the beams related to the plurality of PDSCHs. If it has succeeded in LBT for all the beams, the process proceeds to step S15. If it has not succeeded in LBT for all the beams, the process proceeds to step S16.

[0051] On the other hand, in step S14, the UE transmits the PUSCH corresponding to the successful LBT.

[0052] In step S15, the UE starts transmitting the plurality of PUSCHs. On the other hand, in step S16, the UE aborts all transmissions of the plurality of PUSCHs.

[0053] "When transmitting a plurality of PUSCHs using a plurality of beams" may be a case where any one or a plurality of the following conditions 1) and 2) are satisfied.

[0054] 1) In PUSCH repeated transmission, when the beams applied for each repetition are not the same. 2) In multiple transmissions of PUSCHs having different contents instead of repeated transmission, when the beams applied for each transmission are not the same.

[0055] Note that "the beams are not the same" means that the beams may be different for each PUSCH transmission, or the same beam may be applied to a part of the plurality of PUSCHs.

[0056] Also, "start the plurality of PUSCH transmissions when LBT is successful for all related beams" may be rephrased as "postpone or cancel (do not transmit) all of the plurality of PUSCH transmissions when LBT fails for any of the related beams".

[0057] Also, "the PUSCH is transmitted for a plurality of TRPs" may be the case even when any one or a plurality of the following conditions 1)-7) are satisfied.

[0058] 1) When the PUSCH is scheduled by a single DCI 2) When a number of SRI (SRS resource indicator) greater than 1 is notified by the DCI that schedules the PUSCH 3) When a number of TPMI (Precoding information and number of layers, Transmitted Precoding Matrix Indicator) greater than 1 is notified by the DCI that schedules the PUSCH 4) When a number of TPC commands greater than 1 is notified by the DCI that schedules the PUSCH 5) When information related to a number of SRS resource sets greater than 1 is set in a higher layer 6) When mapping information between a number of SRI and PUSCH greater than 1 is set in a higher layer 7) When parameters related to a number of PUSCH transmission powers greater than 1 are set in a higher layer

[0059] Note that without considering the above conditions, the UE may "start the plurality of PUSCH transmissions when LBT is successful for all related beams".

[0060] FIG. 11 is a flowchart for explaining an example of PUCCH transmission for a plurality of TRPs in an embodiment of the present invention. In step S21, when the UE transmits a plurality of PUCCHs using a plurality of beams on an unlicensed band, the UE performs LBT independently for each beam in advance. In the subsequent step S22, the UE determines whether the PUCCH is to be transmitted to a plurality of TRPs. Note that the UE may determine whether the plurality of PUCCHs are to be transmitted to a plurality of TRPs. If the PUCCH is to be transmitted to a plurality of TRPs, the process proceeds to step S23. If the PUCCH is not to be transmitted to a plurality of TRPs, the process proceeds to step S24.

[0061] In step S23, the UE determines whether LBT has been successful for all the beams related to the plurality of PDCCHs. If LBT has been successful for all the beams, the process proceeds to step S25. If LBT has not been successful for all the beams, the process proceeds to step S26.

[0062] On the other hand, in step S24, the UE transmits the PUCCH corresponding to the successful LBT.

[0063] In step S25, the UE starts transmitting the plurality of PUCCHs. On the other hand, in step S26, the UE aborts all transmissions of the plurality of PUCCHs.

[0064] "When transmitting a plurality of PUCCHs using a plurality of beams" may be a case where any one or more of the following conditions 1) and 2) are satisfied.

[0065] 1) In PUCCH repeated transmission, when the beams applied for each repetition are not the same. 2) In multiple transmissions of PUCCHs having different contents, not in repeated transmission, when the beams applied for each transmission are not the same.

[0066] Note that "the beams are not the same" means that the beams may be different for each PUCCH transmission, or the same beam may be applied to a part of the plurality of PUCCHs.

[0067] Also, "start the plurality of PUCCH transmissions when LBT is successful for all related beams" may be rephrased as "if LBT fails for any of the related beams, defer or cancel (do not transmit) all of the plurality of PUCCH transmissions".

[0068] Also, "the PUCCH is transmitted for a plurality of TRPs" may be the case where any one or a plurality of the following conditions 1)-4) are satisfied.

[0069] 1) When the spatial direction information of the PUCCH (e.g., PUCCH-SpatialRelationInfo) is set multiple times in a higher layer (e.g., the RRC layer). 2) When the spatial direction information of the PUCCH (e.g., PUCCH-SpatialRelationInfo) is activated or selected multiple times in a higher layer (e.g., the MAC layer). 3) When the transmission power information of the PUCCH (e.g., P0, pathloss reference RS, closed loop power control index) is set multiple times in a higher layer (e.g., the RRC layer). 4) When the transmission power information of the PUCCH (e.g., P0, pathloss reference RS, closed loop power control index) is activated or selected multiple times in a higher layer (e.g., the MAC layer).

[0070] Note that without considering the above conditions, the UE may "start the plurality of PUCCH transmissions when LBT is successful for all related beams".

[0071] The above embodiments may be applicable only at 52.6 GHz - 71 GHz. Further, the above embodiments may be applicable only in FR2-2. They may be applicable only in the case of specific SCS settings (e.g., 120 kHz SCS, 480 kHz SCS, 960 kHz SCS, etc.). Also, the above embodiments may be applicable only in a specific band (e.g., unlicensed band).

[0072] According to the above embodiments, in each beam when LBT is operated independently in a plurality of beams, the operation of whether to start transmission can be appropriately defined according to the situation.

[0073] That is, in a wireless communication system, the transmission of a plurality of channels can be controlled based on directional LBT (Directional Listen before talk) using a plurality of beams.

[0074] (Device Configuration) Next, a functional configuration example of the base station 10 and the terminal 20 that execute the processes and operations described so far will be described. The base station 10 and the terminal 20 include functions for implementing the above-described embodiments. However, the base station 10 and the terminal 20 may each be provided with only some of the functions in the embodiments.

[0075] <Base Station 10> FIG. 12 is a diagram showing an example of the functional configuration of the base station 10 in the embodiment of the present invention. As shown in FIG. 12, the base station 10 includes a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in FIG. 12 is merely an example. As long as the operations according to the embodiment of the present invention can be executed, the functional division and the names of the functional units may be anything.

[0076] The transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and wirelessly transmitting the signal. Further, the transmission unit 110 transmits an inter-network node message to other network nodes. The reception unit 120 includes a function of receiving various signals transmitted from the terminal 20 and obtaining information of a higher layer, for example, from the received signals. Further, the transmission unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, etc. to the terminal 20. Further, the reception unit 120 receives an inter-network node message from other network nodes.

[0077] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20. The content of the setting information is, for example, information related to the setting of LBT.

[0078] As described in the embodiment, the control unit 140 performs control related to the setting of LBT. Further, the control unit 140 executes scheduling. A functional unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and a functional unit related to signal reception in the control unit 140 may be included in the reception unit 120.

[0079] <Terminal 20> FIG. 13 is a diagram showing an example of the functional configuration of the terminal 20 in the embodiment of the present invention. As shown in FIG. 13, the terminal 20 includes a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in FIG. 13 is merely an example. As long as the operations according to the embodiment of the present invention can be executed, the function classification and the names of the functional units may be anything.

[0080] The transmitting unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal. The receiving unit 220 wirelessly receives various signals and acquires signals of a higher layer from the received physical layer signals. Also, the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, etc. transmitted from the base station 10. Further, for example, the transmitting unit 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc. to another terminal 20 as D2D communication, and the receiving unit 220 receives PSCCH, PSSCH, PSDCH, or PSBCH, etc. from another terminal 20.

[0081] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220. Also, the setting unit 230 stores preset setting information. The content of the setting information is, for example, information related to the setting of LBT.

[0082] As described in the embodiment, the control unit 240 performs control related to the setting of LBT. The functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220.

[0083] (Hardware Configuration) The block diagrams (FIGS. 12 and 13) used in the description of the above embodiments show blocks of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically combined device, or two or more physically or logically separated devices may be directly or indirectly (for example, using wired, wireless, etc.) connected and realized using these multiple devices. The functional block may be realized by combining software with the above one device or the above multiple devices.

[0084] Functions include, but are not limited to, judgment, decision, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, regarded as, notification (broadcasting), notification (notifying), communication (communicating), forwarding, configuration (configuring), reconfiguration (reconfiguring), allocation (allocating, mapping), assignment (assigning), etc. For example, a functional block (component) that functions to transmit is called a transmitting unit or a transmitter. In any case, as described above, the realization method is not particularly limited.

[0085] For example, the base station 10, the terminal 20, etc. in an embodiment of the present disclosure may function as a computer that performs the processing of the wireless communication method of the present disclosure. FIG. 14 is a diagram showing an example of the hardware configuration of the base station 10 and the terminal 20 according to an embodiment of the present disclosure. The above base station 10 and terminal 20 may physically be 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, and the like.

[0086] In the following description, the term "device" can be read as a circuit, device, unit, etc. The hardware configurations of the base station 10 and the terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without including some devices.

[0087] Each function in the base station 10 and the terminal 20 is realized by causing a predetermined software (program) to be loaded onto hardware such as the processor 1001 and the storage device 1002, 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 storage device 1002 and the auxiliary storage device 1003.

[0088] The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, etc. For example, the above-described control unit 140, control unit 240, etc. may be realized by the processor 1001.

[0089] Also, the processor 1001 reads a program (program code), software module, 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 according to these. As the program, a program for causing a computer to execute at least a part of the operations described in the above embodiments is used. For example, the control unit 140 of the base station 10 shown in FIG. 12 may be stored in the storage device 1002 and realized by a control program operating on the processor 1001. Also, for example, the control unit 240 of the terminal 20 shown in FIG. 13 may be stored in the storage device 1002 and realized by a control program operating on the processor 1001. Although it has been described that the above various processes are 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. Note that the program may be transmitted from a network via a telecommunication line.

[0090] The storage device 1002 is a computer-readable recording medium and may be constituted by at least one of, for example, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may be referred to as a register, cache, main memory (main storage device), etc. The storage device 1002 can store a program (program code), software module, etc. executable for implementing the communication method according to an embodiment of the present disclosure.

[0091] The auxiliary storage device 1003 is a computer-readable recording medium, and may be constituted by, 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 (for example, a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc. The above-described 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 auxiliary storage device 1003.

[0092] The communication device 1004 is hardware (a transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). For example, a transmission / reception antenna, an amplifier section, a transmission / reception section, a transmission line interface, etc. may be realized by the communication device 1004. The transmission / reception section may be physically or logically separated into a transmission section and a reception section.

[0093] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an external input. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs an output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

[0094] Also, 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 for each device.

[0095] Also, 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), and 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 hardware components.

[0096] Fig. 15 shows a configuration example of the vehicle 2001. As shown in Fig. 15, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in the present disclosure may be applied to a communication device mounted on the vehicle 2001, and for example, may be applied to the communication module 2013.

[0097] The drive unit 2002 is composed 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 an operation of the steering wheel operated by a user.

[0098] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals from various sensors 2021 to 2029 provided in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be referred to as an ECU (Electronic Control Unit).

[0099] 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 rotational speed signal of the front wheels or rear wheels obtained by a rotational speed sensor 2022, an air pressure signal of the front wheels or 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, a depression amount signal of the accelerator pedal obtained by an accelerator pedal sensor 2029, a depression amount signal of the brake pedal obtained by a brake pedal sensor 2026, an operation signal of the shift lever obtained by a shift lever sensor 2027, a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028, and the like.

[0100] The information service unit 2012 is composed of various devices for providing (outputting) various information such as driving information, traffic information, and entertainment information, such as a car navigation system, an audio system, speakers, a television, and a radio, and one or more ECUs for controlling these devices. The information service unit 2012 uses information acquired from an external device via a communication module 2013 or the like to provide various multimedia information and multimedia services to the passengers of the vehicle 2001. The information service unit 2012 may include an input device for receiving external input (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.), or may include an output device for performing external output (for example, a display, a speaker, an LED lamp, a touch panel, etc.).

[0101] The driving assistance system unit 2030 is composed of various devices for providing functions to prevent accidents and reduce the driver's driving load, 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, AI processors, and one or more ECUs for controlling these devices. Also, the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize driving assistance functions or autonomous driving functions.

[0102] The communication module 2013 can communicate with the microprocessor 2031 and the components of the vehicle 2001 via a communication port. For example, the communication module 2013 transmits and receives data with the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, the microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 - 29 provided in the vehicle 2001 via the communication port 2033.

[0103] 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 transmits and receives various information via wireless communication with external devices. The communication module 2013 may be either inside or outside the electronic control unit 2010. The external device may be, for example, a base station, a mobile station, etc.

[0104] The communication module 2013 may transmit at least one of the signals from the various sensors 2021-2028 input to the electronic control unit 2010, the information obtained based on the signals, and the information based on the input from the external (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 an input unit that receives the input. For example, the PUSCH transmitted by the communication module 2013 may include the information based on the above input.

[0105] The communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device and displays it to the information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may be referred to as an output unit that outputs the information (for example, outputs the information to devices such as a display and a speaker based on the PDSCH received by the communication module 2013 (or the data / information decoded from the PDSCH)). Also, the communication module 2013 stores the various information received from the external device in the 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, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheels 2007, the rear wheels 2008, the axle 2009, the sensors 2021-2029, etc. provided in the vehicle 2001.

[0106] (Summary of the Embodiment) As described above, according to the embodiment of the present invention, there is provided a terminal including: a receiving unit that performs sensing for applying each of a plurality of receiving beams corresponding to a plurality of transmission beams applied to transmission of a plurality of uplink shared channels in COT (Channel Occupancy Time), and performs LBT (Listen before talk); a control unit that determines whether transmission of the plurality of uplink shared channels satisfies a certain condition; and a transmitting unit that executes transmission of the plurality of uplink shared channels when the certain condition is satisfied and all of the plurality of receiving beams succeed in LBT.

[0107] With the above configuration, in each beam when LBT operates independently in a plurality of beams, the operation of whether to start transmission can be appropriately defined according to the situation. That is, in a wireless communication system, transmission of a plurality of channels can be controlled based on directional LBT (Directional Listen before talk) using a plurality of beams.

[0108] The certain condition may be that the plurality of uplink shared channels are transmitted to a plurality of TRPs (Transmission and reception points). With this configuration, in each beam when LBT operates independently in a plurality of beams, the operation of whether to start transmission can be appropriately defined according to the situation.

[0109] When the certain condition is satisfied and at least a part of the plurality of receiving beams fails in LBT, the transmitting unit may not execute all transmissions of the plurality of uplink shared channels. With this configuration, in each beam when LBT operates independently in a plurality of beams, the operation of whether to start transmission can be appropriately defined according to the situation.

[0110] When the certain condition is not satisfied, the transmitting unit may execute transmission of the uplink shared channel corresponding to the reception beam that has succeeded in LBT among the plurality of reception beams. With this configuration, in each beam when LBT is independently operated in a plurality of beams, the operation of whether or not to start transmission can be appropriately defined according to the situation.

[0111] The certain condition may be that the plurality of uplink shared channels are scheduled by a single control information. With this configuration, in each beam when LBT is independently operated in a plurality of beams, the operation of whether or not to start transmission can be appropriately defined according to the situation.

[0112] Further, according to an embodiment of the present invention, there is applied a communication method in which a terminal executes a reception procedure of performing LBT (Listen before talk) that executes sensing applied to each of a plurality of reception beams corresponding to a plurality of transmission beams applied to transmission of a plurality of uplink shared channels in COT (Channel Occupancy Time), a control procedure of determining whether or not transmission of the plurality of uplink shared channels satisfies a certain condition, and a transmission procedure of executing transmission of the plurality of uplink shared channels when the certain condition is satisfied and all of the plurality of reception beams have succeeded in LBT.

[0113] With the above configuration, in each beam when LBT is independently operated in a plurality of beams, the operation of whether or not to start transmission can be appropriately defined according to the situation. That is, in a wireless communication system, transmission of a plurality of channels can be controlled based on directional LBT (Directional Listen before talk) using a plurality of beams.

[0114] (Supplement of the embodiment) The embodiments of the present invention have been described above. However, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, corrections, alternatives, substitutions, etc. Although specific numerical examples have been used for the purpose of facilitating the understanding of the invention, unless otherwise specified, those numerical values are merely examples, and any appropriate values may be used. The classification of items in the above description is not essential to the present invention, and matters described in two or more items may be used in combination as needed, or matters described in one item may be applied to matters described in another item (as long as there is no contradiction). The boundaries of the functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical components. The operations of a plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components. Regarding the processing procedures described in the embodiments, the order of processing may be changed as long as there is no contradiction. For the sake of convenience in explaining the processing, the base station 10 and the terminal 20 have been described using a functional block diagram, but such devices may be implemented in hardware, software, or a combination thereof. The software that operates by the processor included in the base station 10 according to the embodiments of the present invention and the software that operates by the processor included in the terminal 20 according to the embodiments of the present invention may each be stored in a random access memory (RAM), a flash memory, a read-only memory (ROM), an EPROM, an EEPROM, a register, a hard disk drive (HDD), a removable disk, a CD-ROM, a database, a server, or any other appropriate storage medium.

[0115] In addition, the notification of information is not limited to the aspects / embodiments described in this disclosure, and other methods may be used. For example, the notification of information may be implemented 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), notification information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof. Also, the RRC signaling may be referred to as an RRC message, and for example, it may be an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0116] Each aspect / embodiment described in this disclosure may be applied to at least one of systems using LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), other suitable systems, and next-generation systems extended based thereon. Also, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A and 5G, etc.) may be applied.

[0117] The processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this specification may be reordered as long as there is no contradiction. For example, regarding the methods described in the present disclosure, the elements of various steps are presented using an exemplary order and are not limited to the specific order presented.

[0118] The specific operations assumed to be performed by the base station 10 in this specification may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having the base station 10, it is obvious that various operations performed for communication with the terminal 20 can be performed by at least one of the base station 10 and other network nodes other than the base station 10 (for example, but not limited to, MME or S-GW, etc.). Although the case where there is one other network node other than the base station 10 is exemplified above, the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW).

[0119] The information or signals, etc. described in the present disclosure can be output from an upper layer (or lower layer) to a lower layer (or upper layer). They may also be input and output via a plurality of network nodes.

[0120] The input and output information, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. The input and output information, etc. can be overwritten, updated, or appended. The output information, etc. may be deleted. The input information, etc. may be transmitted to other devices.

[0121] The determination in the present disclosure may be made by a value represented by 1 bit (0 or 1), or by a Boolean value (true or false), or by a numerical comparison (for example, comparison with a predetermined value).

[0122] Software should be broadly construed 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, etc., whether called software, firmware, middleware, microcode, hardware description language, or by any other name.

[0123] Also, 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 technologies (such as coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL)) and wireless technologies (such as infrared, microwave), at least one of these wired and wireless technologies is included within the definition of the transmission medium.

[0124] 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., which 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.

[0125] 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 channel and symbol may be a signal (signaling). Also, a signal may be a message. Also, a component carrier (CC) may be called a carrier frequency, cell, frequency carrier, etc.

[0126] The terms "system" and "network" used in this disclosure are used interchangeably.

[0127] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, relative values from a predetermined value, or by using other corresponding information. For example, the radio resources may be indicated by an index.

[0128] The names used for the above-described parameters are not limiting in any way. Furthermore, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. Since various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are not limiting in any way.

[0129] In the present disclosure, terms such as "base station (BS: Base Station)", "radio base station", "base station apparatus", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. The base station may also be referred to by terms such as macro cell, small cell, femto cell, pico cell, etc.

[0130] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides communication services in this coverage.

[0131] In the present disclosure, the base station transmitting information to the terminal may be read as the base station instructing the terminal to perform control / operations based on the information.

[0132] In the present disclosure, terms such as "mobile station (MS)", "user terminal", "user equipment (UE)", and "terminal" can be used interchangeably.

[0133] 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 terms.

[0134] At least one of the base station and the mobile station may be referred to as a transmission device, a reception device, a communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body refers to a movable object, and the moving speed is arbitrary. Also, the case where the moving body is stopped is of course included. The moving body includes, for example, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, shovel cars, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, rear cars, rickshaws, ships (ship and other watercraft), airplanes, rockets, artificial satellites, drones (registered trademark), multicopters, quadcopters, balloons, and things mounted on these, and is not limited thereto. Further, the moving body may be a moving body that autonomously travels based on an operation command. It may be a vehicle (e.g., a car, an airplane, etc.), a moving body that moves unmanned (e.g., a drone, an autonomous driving vehicle, etc.), or a robot (humanoid or unmanned). Note that at least one of the base station and the mobile station also includes a device that does not necessarily move during a 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.

[0135] Also, the base station in the present disclosure may be read as a user terminal. For example, for a configuration in which communication between the base station and the user terminal is replaced with communication between a plurality of terminals 20 (which may be referred to as, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.), each aspect / embodiment of the present disclosure may be applied. In this case, the functions of the above-described base station 10 may be configured to be functions of the terminal 20. Also, terms such as "uplink" and "downlink" may be read as terms corresponding to inter-terminal communication (e.g., "side"). For example, an uplink channel, a downlink channel, etc. may be read as a side channel.

[0136] Similarly, the user terminal in the present disclosure may be rewritten by the base station. In this case, the functions of the above-described user terminal may be configured as functions of the base station.

[0137] The terms "determining" and "deciding" used in the present disclosure may include a variety of operations. "Determining" and "deciding" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or another data structure), and considering something as having "determined" or "decided" something ascertained. Further, "determining" and "deciding" may include considering something as having "determined" or "decided" something received (e.g., receiving information), transmitted (e.g., transmitting information), input, output, accessed (e.g., accessing data in a memory), etc. Further, "determining" and "deciding" may include considering something as having "determined" or "decided" something resolved, selected, chosen, established, compared, etc. That is, "determining" and "deciding" may include considering something as having "determined" or "decided" some operation. Further, "determining (deciding)" may be replaced with "assuming", "expecting", "considering", etc.

[0138] The terms "connected" and "coupled," or any variations thereof, mean any direct or indirect connection or coupling between two or more elements, and can 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 can be physical, logical, or a combination thereof. For example, "connected" may be read as "accessed." As used in this disclosure, two elements can be considered to be "connected" or "coupled" to each other using at least one of one or more wires, cables, and printed electrical connections, as well as, by way of some non-limiting and non-exhaustive examples, electromagnetic energy having wavelengths in the radio frequency region, microwave region, and optical (both visible and invisible) region.

[0139] The reference signal can also be abbreviated as RS (Reference Signal) and may be called a Pilot depending on the applicable standard.

[0140] As used in this disclosure, the description "based on" does not mean "based only on" unless otherwise specified. In other words, the description "based on" means both "based only on" and "based at least on."

[0141] Any reference to an element using designations such as "first," "second," etc. used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, a reference to a first and a second element does not mean that only two elements can be employed, or that the first element must precede the second element in any form.

[0142] In the configuration of each of the above devices, "means" can be replaced with "section," "circuit," "device," etc.

[0143] In the present disclosure, when the terms "include", "including" and their variants are used, these terms are intended to be inclusive, similar to the term "comprising". Further, the term "or" used in the present disclosure is not intended to be an exclusive disjunction.

[0144] The wireless 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 referred to as a subframe. The subframe may further be composed of one or more slots in the time domain. The subframe may have a fixed time length (e.g., 1 ms) independent of numerology.

[0145] Numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology may indicate, for example, at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, wireless frame configuration, specific filtering processing performed by a transceiver in the frequency domain, specific windowing processing performed by a transceiver in the time domain, etc.

[0146] A slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A slot may be a time unit based on numerology.

[0147] The slot may include a plurality of mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. Also, the mini-slot may be called a sub-slot. The mini-slot may be composed of a smaller number of symbols than the slot. The PDSCH (or PUSCH) transmitted in a time unit larger than the mini-slot may be called PDSCH (or PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using the mini-slot may be called PDSCH (or PUSCH) mapping type B.

[0148] The radio frame, sub-frame, slot, mini-slot, and symbol all represent time units for signal transmission. Different names corresponding to each of them may also be used.

[0149] For example, one sub-frame may be called a Transmission Time Interval (TTI), or a plurality of consecutive sub-frames may be called a TTI, or one slot or one mini-slot may be called a TTI. That is, at least one of the sub-frame and the TTI may be the sub-frame (1 ms) in the existing LTE, or 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, a mini-slot, etc. instead of a sub-frame.

[0150] Here, the TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling to allocate radio resources (such as the frequency bandwidth and transmission power that can be used in each terminal 20) to each terminal 20 in TTI units. Note that the definition of the TTI is not limited to this.

[0151] The TTI may be a transmission time unit such as a channel-coded data packet (transport block), code block, codeword, etc., or may be a processing unit such as scheduling or link adaptation. When the TTI is given, the time interval (e.g., the number of symbols) in which a transport block, code block, codeword, etc. are actually mapped may be shorter than the TTI.

[0152] Note that when one slot or one mini-slot is called a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) may be the minimum time unit for scheduling. Also, the number of slots (mini-slot number) constituting the minimum time unit for the scheduling may be controlled.

[0153] A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel.8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. A TTI shorter than the normal TTI may be called a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, mini-slot, sub-slot, slot, etc.

[0154] Note that a long TTI (e.g., a normal TTI, subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, or a short TTI (e.g., a shortened TTI, etc.) may be read as a TTI having a TTI length less than that of the long TTI and a TTI length of 1 ms or more.

[0155] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and in the frequency domain, it may include one or a plurality of consecutive subcarriers. The number of subcarriers included in the RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in the RB may be determined based on the numerology.

[0156] Also, the time domain of the RB may include one or more symbols, and may have a length of 1 slot, 1 mini-slot, 1 sub-frame, or 1 TTI. 1 TTI, 1 sub-frame, etc. may each be composed of one or more resource blocks.

[0157] Note that one or more RBs may be referred to as physical resource blocks (PRBs), sub-carrier groups (SCGs), resource element groups (REGs), PRB pairs, RB pairs, etc.

[0158] Also, a resource block may be composed of one or more resource elements (REs). For example, 1 RE may be a radio resource region of 1 sub-carrier and 1 symbol.

[0159] A bandwidth part (BWP) (which may also be called a partial bandwidth, etc.) may represent a subset of consecutive common resource blocks for a certain numerology in a certain carrier. Here, the common RB may be specified by the index of the RB based on the common reference point of the carrier. A PRB is defined in a certain BWP and may be numbered within that BWP.

[0160] The BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or more BWPs may be set within one carrier for a UE.

[0161] At least one of the set BWPs may be active, and the UE may not be assumed to transmit and receive a predetermined signal / channel outside the active BWP. Note that "cell", "carrier", etc. in the present disclosure may be read as "BWP".

[0162] The structures such as the above-mentioned radio frames, sub-frames, slots, mini-slots, and symbols are merely illustrative. For example, the number of sub-frames included in a radio frame, the number of slots per sub-frame or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of sub-carriers included in an RB, and the number of symbols within a TTI, symbol length, cyclic prefix (CP) length, etc. can be variously changed.

[0163] In the present disclosure, for example, when articles are added by translation like a, an, and the in English, the present disclosure may include that the nouns following these articles are in the plural form.

[0164] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". Note that the term may also mean "A and B are different from C respectively". Terms such as "separate", "coupled", etc. may also be interpreted in the same way as "different".

[0165] Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched and used during execution. Also, the notification of predetermined information (for example, the notification of "being X") is not limited to being explicitly performed, and may be performed implicitly (for example, without performing the notification of the predetermined information).

[0166] As described in detail above regarding the present disclosure, it is obvious to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as modified and changed aspects without departing from the spirit and scope of the present disclosure determined by the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative explanation and has no restrictive meaning for the present disclosure.

Description of Reference Numerals

[0167] 10 Base station 110 Transmission unit 120 Reception unit 130 Setting unit 140 Control unit 20 Terminal 210 Transmission unit 220 Reception unit 230 Setting unit 240 Control unit 1001 Processor 1002 Memory device 1003 Auxiliary memory device 1004 Communication device 1005 Input device 1006 Output device

Claims

1. A receiving unit that performs LBT (Listen before talk) to execute sensing for each of a plurality of receiving beams corresponding to a plurality of transmitting beams applied to the transmission of a plurality of uplink shared channels in COT (Channel Occupancy Time); A control unit that determines whether the transmission of the plurality of uplink shared channels satisfies a certain condition; A terminal having a transmitting unit that executes the transmission of the plurality of uplink shared channels when the certain condition is satisfied and all of the plurality of receiving beams succeed in LBT.

2. The terminal according to claim 1, wherein the certain condition is that the plurality of uplink shared channels are transmitted to a plurality of TRPs (Transmission and reception points).

3. The terminal according to claim 2, wherein when the certain condition is satisfied and at least a part of the plurality of receiving beams fails in LBT, the transmitting unit does not execute the transmission of all of the plurality of uplink shared channels.

4. The terminal according to claim 2, wherein when the certain condition is not satisfied, the transmitting unit executes the transmission of the uplink shared channels corresponding to the receiving beams that have succeeded in LBT among the plurality of receiving beams.

5. The terminal according to claim 1, wherein the certain condition is that the plurality of uplink shared channels are scheduled by a single control information.

6. A receiving procedure that performs LBT (Listen before talk) to execute sensing for each of a plurality of receiving beams corresponding to a plurality of transmitting beams applied to the transmission of a plurality of uplink shared channels in COT (Channel Occupancy Time); A control procedure that determines whether the transmission of the plurality of uplink shared channels satisfies a certain condition; A communication method in which a terminal executes a transmission procedure of transmitting the plurality of uplink shared channels when a certain condition is satisfied and when all of the plurality of received beams succeed in LBT.

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