Terminal and communication method

Abstract

The terminal comprises: a receiving unit which receives control information including information for allocating multiple uplink transmissions from a base station; a control unit which determines parameters applied to the multiple uplinks based on the control information; and a sending unit which applies the determined parameters to send the multiple uplinks to the base station.

Description

Technical Field

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

[0002] In the successor system of LTE (Long Term Evolution), namely NR (New Radio) (also known as "5G"), technologies that meet the requirements such as large-capacity systems, high data transmission speeds, low latency, simultaneous connection of multiple terminals, low costs, and power saving are studied.

[0003] In addition, in the existing LTE system, in order to expand the frequency band, the use of a frequency band (also called an unlicensed band, unlicensed carrier, unlicensed CC) different from the frequency band (licensed band) licensed to the communication operator is supported. As an unlicensed band, for example, it is assumed that the 2.4 GHz band, 5 GHz band, 6 GHz band, etc. of Wi-Fi (registered trademark) or Bluetooth (registered trademark) can be used.

[0004] Specifically, Rel-13 supports carrier aggregation (CA) that integrates a licensed band carrier (CC) and an unlicensed band carrier (CC). Therefore, communication using the unlicensed band together with the licensed band is called License-Assisted Access (LAA).

[0005] In a wireless communication system that uses an unlicensed band for communication together with a licensed band, the base station device (downlink) and the user terminal (uplink) perform channel monitoring (carrier sensing) in order to confirm the presence or absence of transmission by other devices (e.g., base station devices, user terminals, Wi-Fi devices, etc.) before transmitting data in the unlicensed band. If it is confirmed as a result of the monitoring that there is no transmission from other devices, the transmission timing can be obtained and the transmission can be performed. This action is called LBT (Listen Before Talk). In addition, in NR, a system that supports an unlicensed band is called an NR-U system.

[0006] Prior art literature

[0007] Non-patent literature

[0008] Non-patent document 1: 3GPP TS 38.331 V15.8.0 (2019-12)

[0009] Non-patent document 2: 3GPP TS 38.212 V16.0.0 (2019-12)

[0010] Non-patent document 3: 3GPP TS 38.213 V16.0.0 (2019-12)

[0011] Non-patent document 4: 3GPP TS 37.213 V16.0.0 (2019-12) Summary of the invention

[0012] Problem that the invention aims to solve

[0013] The base station can use the NR DCI (Downlink Control Information) format to indicate multiple UL transmissions using one DCI. On the other hand, in UL (Uplink) transmission in the NR-U system, the terminal needs to determine the parameters applied to the UL transmission, such as the channel access type, based on the DCI. Therefore, when multiple UL transmissions are indicated using one DCI, it is unclear to which UL transmission the parameters notified by the DCI are applied.

[0014] The present invention has been made in view of the above-mentioned situation, and an object of the present invention is to determine a parameter to be applied to each uplink transmission when a plurality of uplink transmissions are scheduled in a wireless communication system.

[0015] Means used to solve problems

[0016] According to the disclosed technology, a terminal is provided, which includes: a receiving unit, which receives control information containing information for allocating multiple uplink transmissions from a base station; a control unit, which determines parameters applied to the multiple uplinks based on the control information; and a sending unit, which applies the determined parameters to send the multiple uplinks to the base station.

[0017] Effects of the Invention

[0018] According to the disclosed technology, in a wireless communication system, when a plurality of uplink transmissions are scheduled, it is possible to determine parameters to be applied to each uplink transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a diagram showing a configuration example of a wireless communication system in an embodiment of the present invention.

[0020] Figure 2 It is a diagram for explaining a wireless communication system in an embodiment of the present invention.

[0021] Figure 3 It is a diagram for explaining multi-TTI grant.

[0022] Figure 4 It is a timing diagram for explaining an example of signaling in an embodiment of the present invention.

[0023] Figure 5 This is a flowchart for explaining an example of the operation of the terminal 20 in the embodiment of the present invention.

[0024] Figure 6 This is a flowchart for explaining example (1) in which PUSCH and SRS are transmitted in the embodiment of the present invention.

[0025] Figure 7 This is a flowchart for explaining example (1) in which PUCCH and SRS are transmitted in the embodiment of the present invention.

[0026] Figure 8 This is a flowchart for explaining Example (2) in which PUSCH and SRS are transmitted in the embodiment of the present invention.

[0027] Fig. 9 This is a flowchart for explaining Example (2) in which PUCCH and SRS are transmitted in the embodiment of the present invention.

[0028] Fig.10 1 is a diagram showing an example (1) in which a PUSCH and an SRS are transmitted in a plurality of RB sets according to an embodiment of the present invention.

[0029] Fig.11 1 is a diagram showing an example (2) in which a PUSCH and an SRS are transmitted in a plurality of RB sets according to an embodiment of the present invention.

[0030] Fig.12 This is a diagram showing an example (3) in which PUSCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention.

[0031] Fig.13 This is a diagram showing an example (4) in which PUSCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention.

[0032] Fig.14 : is a diagram showing an example (5) in which PUSCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention.

[0033] Fig.15 : is a diagram showing an example (6) in which PUSCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention.

[0034] Fig.16 : is a diagram showing an example (7) in which PUSCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention.

[0035] Fig.17 1 is a diagram showing an example (1) in which a PUCCH and an SRS are transmitted in a plurality of RB sets according to an embodiment of the present invention.

[0036] Fig.18 : is a diagram showing an example (2) in which the PUCCH and the SRS are transmitted in a plurality of RB sets according to the embodiment of the present invention.

[0037] Fig.19 3 is a diagram showing an example (3) in which the PUCCH and the SRS are transmitted in a plurality of RB sets in an embodiment of the present invention.

[0038] Fig. 20 4 is a diagram showing an example (4) in which PUCCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention.

[0039] Fig.21 : is a diagram showing an example (5) in which PUCCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention.

[0040] Fig. 22 It is a diagram showing an example (6) in which PUCCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention.

[0041] Fig.23 It is a diagram showing an example (7) in which PUCCH and SRS are transmitted in a plurality of RB sets in the embodiment of the present invention.

[0042] Fig.24 It is a diagram showing an example of the functional configuration of the base station 10 in the embodiment of the present invention.

[0043] Fig.25 This is a diagram showing an example of the functional configuration of the terminal 20 in the embodiment of the present invention.

[0044] Fig.26 This is a diagram showing an example of the hardware configuration of the base station 10 or the terminal 20 in the embodiment of the present invention. DETAILED DESCRIPTION

[0045] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below is only an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0046] The wireless communication system of the embodiment of the present invention may appropriately use existing technologies when operating. However, the existing technologies are, for example, existing LTE, but are not limited to existing LTE. In addition, unless otherwise specified, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and subsequent methods (such as NR) of LTE-Advanced.

[0047] In addition, in the embodiments of the present invention described below, the terms SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), PUSCH (Physical Uplink Shared Channel), etc. used in the existing LTE are used. This is for the convenience of explanation, and the same signals, functions, etc. as them may also be referred to 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 the signals used in NR are not necessarily explicitly stated as "NR-".

[0048] Furthermore, in the embodiments of the present invention, the duplexing method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, Flexible Duplex, etc.).

[0049] In the embodiment of the present invention, “configuring” wireless parameters and the like may be pre-configuring predetermined values, or may be configuring wireless parameters notified from the base station 10 or the terminal 20 .

[0050] Figure 11 is a diagram showing a configuration example of a wireless communication system in an embodiment of the present invention. Figure 1 As shown, the wireless communication system in the embodiment of the present invention includes a base station 10 and a terminal 20 . Figure 1 Although one base station 10 and one terminal 20 are shown respectively, this is only an example, and there may be a plurality of each.

[0051] The base station 10 is a communication device that provides more than one cell and performs wireless communication with the terminal 20. The physical resources of the wireless signal are defined by the time domain and the frequency domain. The time domain can be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain can be defined by the number of subcarriers or resource blocks. The base station 10 sends synchronization signals and system information to the terminal 20. Synchronization signals are, for example, NR-PSS and NR-SSS. System information is sent, for example, via NR-PBCH, also known as broadcast information. Figure 1 As shown, for example, the base station 10 sends a control signal or data to the terminal 20 via DL (Downlink), and receives a control signal or data from the terminal 20 via UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. In addition, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output)-based communications to DL or UL. In addition, both the base station 10 and the terminal 20 can communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) based on CA (Carrier Aggregation). In addition, the terminal 20 can communicate via the primary cell of the base station 10 based on DC (Dual Connectivity) and the primary and secondary cells (PSCell: Primary Secondary Cell) of other base stations 10.

[0052] The terminal 20 is a communication device having a wireless communication function, such as a smart phone, a mobile phone, a tablet computer, a wearable terminal, or an M2M (Machine-to-Machine) communication module. Figure 1 As shown, the terminal 20 receives a control signal or data from the base station 10 via DL and transmits a control signal or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system.

[0053] Figure 2 It is a diagram for explaining a wireless communication system in an embodiment of the present invention. Figure 2FIG. 2 shows a configuration example of a wireless communication system in which NR-DC (NR-Dual connectivity) is performed. Figure 2 As shown, there are a base station 10A as a MN (Master Node) and a base station 10B as a SN (Secondary Node). The base stations 10A and 10B are respectively connected to a core network 30. The terminal 20 communicates with both the base stations 10A and 10B.

[0054] The cell group provided by the base station 10A as the MN is called MCG (Master Cell Group), and the cell group provided by the base station 10B as the SN is called SCG (Secondary Cell Group). Figure 1 and Figure 2 can be performed with any structure.

[0055] In the wireless communication system of the present embodiment, the above-mentioned LBT is performed. The base station 10 or the terminal 20 obtains COT (Channel Occupancy Time) and transmits when the LBT result is idle (LBT successful), and does not transmit when the LBT result is busy (LBT-busy).

[0056] The wireless communication system in this embodiment can perform carrier aggregation (CA) using unlicensed CCs and authorized CCs, dual connection (DC) using unlicensed CCs and authorized CCs, and independent (SA) using only unlicensed CCs. CA, DC, or SA can be performed through any one of the NR and LTE systems. DC can be performed through at least two of the NR, LTE, and other systems.

[0057] The terminal 20 may be used to detect the presence of a signal (eg, a reference signal (RS) such as a demodulation reference signal (DMRS)) in a PDCCH or a group common (GC)-PDCCH transmitting a burst from the base station 10 .

[0058] The base station 10 may send a specific PDCCH (PDCCH or GC-PDCCH) containing a specific DMRS notifying the start of COT when COT starts with the base station device as an opportunity. At least one of the specific PDCCH and the specific DMRS may be referred to as a COT start notification signal. For example, the base station 10 sends a COT start notification signal to one or more terminals 20, and the terminal 20 can identify the COT when detecting the specific DMRS.

[0059] Figure 3 This is a diagram for explaining multi-TTI grant. In Release 16 NR-U, it is envisaged that a multi-TTI (Transmission Time Interval) grant is used to schedule multiple PUSCHs across multiple time slots / multiple mini-time slots through one DCI (Downlink Control Information). In addition, "scheduling (or scheduling)" can be replaced with "allocation".

[0060] Through multi-TTI grant, multiple consecutive PUSCHs for sending different TBs (Transport blocks) are scheduled. One TB is mapped to one time slot or one mini-time slot and is sent through one PUSCH. One HARQ (Hybrid automatic repeat request) process is allocated to one PUSCH for sending the one TB.

[0061] For multiple PUSCHs scheduled through one DCI, NDI (New data indicator) and RV (Redundancy version) are signaled for each PUSCH through one DCI. In addition, the HARQ process ID notified through the DCI is applied to the first PUSCH after scheduling, and the HARQ process IDs of subsequent PUSCHs are applied with values ​​incremented by 1 in the order of the PUSCHs.

[0062] Figure 3 FIG. 2 is a diagram showing an example of the operation of the terminal 20 that receives the multi-TTI grant. Figure 3 In the example shown in FIG. 1 , four time slots of PUSCH are scheduled through multi-TTI grant.

[0063] Terminal 20 performs LBT just before the time slot in which the first PUSCH is scheduled as shown in A. If the LBT is OK (successful), data is transmitted through four consecutive PUSCHs. If the first LBT is NG (failed), LBT is performed just before the time slot in which the PUSCH is scheduled as shown in B. If the LBT is OK, data is transmitted through three consecutive PUSCHs. The same process is performed thereafter. If LBT is performed just before the time slot in which the last PUSCH is scheduled as shown in D, data is not transmitted if the LBT is NG.

[0064] For example, for PUSCH scheduling, one DCI can support multiple time slots or mini-time slots including "multiple consecutive PUSCHs that may include multiple TBs separated". In addition, for example, the DCI that signals multiple PUSCHs may include NDI and RV. In addition, for example, CBG (Code block group)-based retransmission can be supported in multiple PUSCH scheduling, and can also be signaled through the DCI field according to one or more PUSCHs to be retransmitted, according to each PUSCH, or according to each fixed number of PUSCHs. In addition, for example, the HARQ process ID signaled through the DCI can be applied to the initially scheduled PUSCH, and can also be incremented by 1 in the subsequent PUSCHs.

[0065] In addition, for example, the resource allocation of the time domain in which the PUSCH is scheduled can be extended. For example, the range of the start symbol position and the end symbol position can be extended, or the resource allocation of the continuous time domain can be extended, multiple PUSCHs can be configured in the starting time slot, and multiple start symbol positions can be supported in the terminal-dominated COT.

[0066] In addition, in NR-U, regarding UL authorization based on non-fallback DCI, the following actions 1) to 4) can be performed. In addition, non-fallback DCI formats are, for example, DCI format 1_1 and DCI format 0_1 ​​in the NR system. Non-fallback DCI formats are, for example, DCI formats whose size is larger than the fallback DCI formats, i.e., DCI format 1_0 and DCI format 0_0, and unlike the fallback DCI format, the size is changed depending on the setting. In the following, "*" represents a multiplication operation.

[0067] 1) The LBT type, CP extension value and CAPC (Channel Access Priority Class) may be jointly encoded (ie, the indexes are associated for these combinations) and included in the UL grant.

[0068] 2) The combination of LBT type, CP extension value and CAPC can be set for terminal 20 through RRC signaling specific to terminal 20.

[0069] 3) The combinations of LBT types {Cat1-16μs, Cat2-16μs, Cat2-25μs, Cat4}, CP extension {0, C1*symbol length-25μs, C2*symbol length-16μs-TA, C3*symbol length-25μs-TA}, CAPC{1, 2, 3, 4}, (Cat2-25μs, C2*symbol length-16μs-TA), (Cat1-16μs, C3*symbol length-25μs-TA), (Cat2-16μs, C3*symbol length-25μs-TA) and (Cat2-16μs or Cat2-16μs, C1*symbol length-25μs) may be supported without RRC settings.

[0070] 4) The bit field of the corresponding DCI may be a field of up to 6 bits. The length of the bit field may be determined depending on the number of combinations set by RRC signaling for the terminal 20.

[0071] Regarding non-fallback DL allocation for scheduling UL transmission (eg, PUCCH), the following actions 1) to 5) may be performed.

[0072] 1) The LBT type and CP extension value may be jointly coded and included in the DL allocation.

[0073] 2) The highest CAPC can always be envisioned.

[0074] 3) The combination of the LBT type and the CP extension value can be set for the terminal 20 through RRC signaling specific to the terminal 20.

[0075] 4) The combinations of LBT types {Cat1-16μs, Cat2-16μs, Cat2-25μs, Cat4}, CP extension {0, C1*symbol length-25μs, C2*symbol length-16μs-TA, C3*symbol length-25μs-TA}, (Cat2-25μs, C2*symbol length-16μs-TA), (Cat1-16μs, C3*symbol length-25μs-TA), (Cat2-16μs, C3*symbol length-25μs-TA) and (Cat2-16μs or Cat2-16μs, C1*symbol length-25μs) may be supported without RRC settings.

[0076] 5) The bit field of the corresponding DCI may be a 4-bit field. The length of the bit field may be determined depending on the number of combinations set by RRC signaling for the terminal 20.

[0077] On the other hand, in the UL grant based on the fallback DCI, the LBT type, CP extension value and CAPC can be jointly encoded with a length of 2 bits and included in the UL grant. In addition, the supported combinations of LBT type, CP extension value and CAPC can be pre-defined by the specification.

[0078] In addition, in the fallback DL allocation for scheduling UL transmission (eg, PUCCH), the LBT type and CP extension value may be jointly encoded with a 2-bit length and included in the DL allocation. In addition, the supported combinations of LBT types and CP extension values ​​may be predefined by the specification.

[0079] Among them, as the mechanism of LBT, FBE (Frame Based Equipment) and LBE (Load Based Equipment) are studied. The difference between the two lies in the frame structure used for transmission and reception, channel occupancy time, etc. For FBE, the structure of transmission and reception related to LBT has a fixed timing. On the other hand, for LBE, the structure of transmission and reception related to LBT is not fixed in the direction of the time axis, but LBT is performed as needed. Specifically, FBE has a fixed frame period, and performs carrier sensing for a certain period of time (also referred to as LBT time (LBT duration) etc.) according to a predetermined frame. As a result, if the channel is available, it is transmitted, but if the channel is not available, it is not transmitted and waits until the carrier sensing timing in the next frame.

[0080] On the other hand, LBE implements the ECCA (Extended CCA) process of "extending the carrier sense time and continuing the carrier sense until the channel becomes available when the result of carrier sense (initial Clear Channel Assessment: CCA) is that the channel is unavailable." In LBE, random backoff is required to appropriately avoid collisions.

[0081] When LBT is executed in LBE, for example, Table 1 may be used to perform signaling of LBT type and CP extension value for both fallback DL allocation and fallback UL grant.

[0082] Table 1

[0083] LBT Type CP expansion Cat1 16μs <![CDATA[C2 ＊ Code length-16us-TA]]> Cat2 25μs <![CDATA[C3 ＊ Code length-25us-TA]]> Cat2 25μs <![CDATA[C1 ＊ Code element length - 25us]]> Cat4 0

[0084] "Cat1" shown in Table 1 corresponds to Category 1, "Cat2" corresponds to Category 2, and "Cat4" corresponds to Category 4. As shown in Table 1, when the LBT type is "Cat1-16μs", the CP extension value can be "C2*symbol length-16μs-TA". In addition, when the LBT type is "Cat2-25μs", the CP extension value can be "C3*symbol length-25μs-TA". In addition, when the LBT type is "Cat2-25μs", the CP extension value can be "C1*symbol length-25μs". In addition, when the LBT type is "Cat4", the CP extension value can be "0".

[0085] In addition, the channel access type (LBT type) is a type of channel access method that "uses a random period or a fixed period during which the time slot that the terminal 20 determines to be monitored before UL transmission is idle." Channel access type 1 corresponds to "Cat4", channel access type 2A corresponds to "Cat2-25μs", and channel access type 2C corresponds to "Cat21-16μs".

[0086] In addition, the CAPC may not be explicitly notified. For UL authorization, the terminal 20 assumes that the CAPC=4 used in the base station 10 in order to obtain CO. In addition, in the case of COT dominated by the terminal 20, that is, category 4, the terminal 20 can select the CAPC by itself. In addition, the mapping between the CAPC and the service type can be the same as the mapping defined for UL-CG (Configured Grant) transmission. In addition, in the case where the LBT of category 4 is used, the highest priority CAPC can be used for the PUCCH associated with the DL allocation.

[0087] When LBT is executed in FBE, the terminal 20 notified that the LBT type is "Cat2-25 μs" or "Cat4" can measure one carrier sense time slot of 9 μs during 25 μs.

[0088] In addition, regarding RAR (Random access response), the terminal 20 can use the same table of LBT type and CP extension value (such as Table 1) and CAPC selection method as the UL authorization based on the fallback DCI. In order to perform the above actions, 2 bits can be notified via RAR (ie, PDSCH) signaling. When the terminal 20 multiplexes user plane data in PUSCH, the terminal 20 can assume that the base station 10 uses CAPC=4 to obtain CO. In addition, in the case of COT dominated by the terminal 20, that is, category 4, the terminal 20 can select CAPC by itself. In addition, the mapping of CAPC and service type can be the same as the mapping defined for UL-CG transmission. In addition, the field representing the resource allocation of the frequency domain contained in the RAR is reduced to accommodate the above 2 bits.

[0089] Figure 4 This is a timing diagram for explaining an example of signaling notification in an embodiment of the present invention. The base station 10 can instruct the terminal 20 to send PUSCH and / or PUCCH or set the sending timing through steps S1 and S2. For example, even before performing the RRC setting based on step S1, the terminal 20 can appropriately determine the CP extension value.

[0090] In step S1, the base station 10 notifies the terminal 20 of settings related to the PUSCH and / or PUCCH via higher layer signaling. For example, the base station 10 may notify the terminal 20 of settings related to CP extension.

[0091] In step S2, the base station 10 sends a UL grant based on the DCI to the terminal 20 via the PDCCH. Then, the terminal 20 sends data to the base station 10 via the PUSCH determined according to the received DCI (S3). Multiple UL transmissions can be scheduled through the DCI. In addition, when the CP extension value is notified through the DCI, the terminal 20 can apply the channel access type, CP extension or CAPC to the PUSCH for transmission.

[0092] In addition, as another example, in step S2, the base station 10 sends a DL allocation based on DCI to the terminal 20 via the PDCCH. Then, the terminal 20 sends uplink control information (UCI) to the base station 10 via the PUCCH determined according to the received DCI (S3). In the case where the channel access type or CP extension is notified by the DCI, the terminal 20 can apply the channel access type or CP extension to the PUCCH for transmission.

[0093] In addition, as another example, in step S2, the base station 10 sends the RAR to the terminal 20 via the PDSCH. Then, the terminal 20 sends data to the base station 10 via the PUSCH determined according to the received RAR (S3). When the channel access type, CP extension or CAPC is notified through the RAR, the terminal 20 can apply the channel access type, CP extension or CAPC to the PUSCH for transmission.

[0094] As described above, in NR, multiple UL transmissions can be indicated by one DCI. For example, using DCI format 0_1 ​​indicating non-fallback UL authorization, in addition to PUSCH, the transmission of A-SRS (Aperiodic Sounding Reference Signal) can be indicated to the terminal 20 (SRS request). In addition, for example, using DCI format 1_1 indicating non-fallback DL allocation, in addition to PUCCH, the transmission of A-SRS can be indicated to the terminal 20 (SRS request).

[0095] In DCI format 0_1, the channel access type, CP extension value, and CAPC applied to UL transmission are notified to the terminal 20 through fields indicating the channel access type, CP extension, and CAPC (0 bits to 6 bits, which can be set by RRC).

[0096] In DCI format 1_1, the channel access type and CP extension value applied to UL transmission are notified to the terminal 20 through the field indicating the channel access type and CP extension (0 bits to 4 bits, which can be set by RRC).

[0097] In the case where multiple UL transmissions are indicated by one DCI, the terminal 20 is unclear about which UL transmission the channel access type, CP extension value, or CAPC notified by DCI format 0_1 ​​or DCI format 1_1 is applied to.

[0098] Therefore, when a plurality of UL transmissions are indicated in the UL transmission of NR-U, the terminal 20 sets an appropriate channel access type, CP extension value or CAPC for each UL transmission.

[0099] For example, when multiple UL transmissions are indicated by DCI, the terminal 20 determines the UL transmission to which the channel access type, CP extension value, or CAPC notified by the DCI is to be applied, for example, as shown in 1) to 3) below.

[0100] 1) Regardless of the type, time or frequency position of each UL transmission, the channel access type, CP extension value or CAPC is applied to all UL transmissions that are instructed to be transmitted.

[0101] 2) Channel access type, CP extension value or CAPC is applied to specific types of UL transmissions.

[0102] 3) Apply channel access type, CP extension value or CAPC to UL transmission at a specific time or frequency position.

[0103] Figure 5 This is a flowchart for explaining an example of the operation of the terminal 20 in the embodiment of the present invention. In step S11, the terminal 20 is instructed to transmit multiple ULs by the base station 10 through DCI. Next, the terminal 20 determines the channel access type, CP extension value or CAPC of the multiple UL transmissions (step S12).

[0104] Figure 6 1 is a diagram showing an example (1) in which a PUSCH and an SRS are transmitted in an embodiment of the present invention. Figure 6 As shown, the transmission instructions of PUSCH and A-SRS can be performed through the PDCCH of DCI format 0_1. Table 2 shows an example of a table used when the channel access type, CP extension value, and CAPC are specified through DCI (for example, non-patent document 2).

[0105] Table 2

[0106]

[0107] As shown in Table 2, the channel access type, CP extension value, and CAPC are notified to the terminal 20 through the "Entry index". The terminal 20 can apply the channel access type, CP extension value, and CAPC corresponding to the "Entry index x#n" to both the PUSCH and A-SRS indicated for transmission, and perform UL transmission. In addition, for the CAPC applied to the A-SRS, the terminal 20 can assume a specific value (for example, "1").

[0108] Figure 7 1 is a diagram showing an example (1) in which a PUCCH and an SRS are transmitted in an embodiment of the present invention. Figure 7 As shown, the transmission instructions of PUCCH and A-SRS can be performed through the PDCCH of DCI format 1_1. Table 3 shows an example of a table used when the channel access type and CP extension value are specified through DCI (for example, non-patent document 2).

[0109] Table 3

[0110] Entry Index Channel access type CP expansion 0 Type2C-ULChannelAccess 0 1 Type2C-ULChannelAccess <![CDATA[C2 ＊ Code length-16us-TA]]> 2 Type2B-ULChannelAccess 0 3 Type2B-ULChannelAccess <![CDATA[C2 ＊ Code element length-16us-TA<!-- 9 --> ]]> 4 Type2A-ULChannelAccess 0 5 Type2A-ULChannelAccess <![CDATA[1 ＊ Code element length - 25us]]> 6 Type2A-ULChannelAccess <![CDATA[C3 ＊ Code length-25us-TA]]> 7 Type1-ULChannelAccess 0 8 Type1-ULChannelAccess <![CDATA[1 ＊ Code element length - 25us]]> 9 Type1-ULChannelAccess <![CDATA[C2 ＊ Code length-16us-TA]]> 10 Type1-ULChannelAccess <![CDATA[C3 ＊ Code length-25us-TA]]>

[0111] As shown in Table 3, the channel access type and CP extension value are notified to the terminal 20 through the "Entry index". The terminal 20 can apply the channel access type and CP extension value corresponding to the "Entry index x#n" to both the PUCCH and A-SRS indicated for transmission and perform UL transmission. In addition, for the CAPC applied to the A-SRS, the terminal 20 can assume a specific value (for example, "1").

[0112] Figure 8 2 is a diagram showing an example (2) in which a PUSCH and an SRS are transmitted in an embodiment of the present invention. Figure 8 As shown, the transmission indication of PUSCH and A-SRS can be performed through the PDCCH of DCI format 0_1.

[0113] The terminal 20 may transmit the PUSCH by applying the channel access type, CP extension value, and CAPC notified by Entry index #n shown in Table 2. On the other hand, the A-SRS may be transmitted by UL by applying a predetermined channel access type, CP extension value, and CAPC. The predetermined channel access type, CP extension value, and CAPC may be specified by the specification or set by high-layer signaling (for example, notified by Entry index #x).

[0114] In addition, a predetermined channel access type, CP extension value, and CAPC may be applied to PUSCH, and a channel access type, CP extension value, and CAPC notified through Entry index#n may be applied to A-SRS.

[0115] Fig. 9 2 is a diagram showing an example (2) in which a PUCCH and an SRS are transmitted in an embodiment of the present invention. Fig. 9 As shown, the transmission indication of PUCCH and A-SRS can be performed through the PDCCH of DCI format 1_1.

[0116] The terminal 20 may send PUSCH by applying the channel access type and CP extension value notified by Entry index#n shown in Table 3. On the other hand, A-SRS may be sent by applying a predetermined channel access type and CP extension value. The predetermined channel access type, CP extension value, and CAPC may be specified by the specification or set by high-layer signaling (for example, notified by Entry index#x).

[0117] In addition, a predetermined channel access type, CP extension value, and CAPC may be applied to the PUCCH, and a channel access type, CP extension value, and CAPC notified through Entry index#n may be applied to the A-SRS.

[0118] Fig.10 1 is a diagram showing an example (1) in which PUSCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention. Fig.10 As shown, the transmission indication of PUSCH and A-SRS can be performed through the PDCCH of DCI format 0_1.

[0119] The terminal 20 applies the channel access type, CP extension value, and CAPC notified by Entry index#n shown in Table 2 to the first UL transmission to be transmitted in each RB set (corresponding to the LBT subband) and transmits. Fig.10 As shown, in RB set #0, since A-SRS is transmitted first, the channel access type, CP extension value, and CAPC notified by Entry index #n are applied to A-SRS. In addition, in RB set #1, since PUSCH is transmitted first, the channel access type, CP extension value, and CAPC notified by Entry index #n are applied to PUSCH. In addition, for the CAPC applied to A-SRS, the terminal 20 can assume a specific value (e.g., "1").

[0120] Fig.11 2 is a diagram showing an example (2) in which PUSCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention. Fig.11 As shown, the transmission indication of PUSCH and A-SRS can be performed through the PDCCH of DCI format 0_1.

[0121] The terminal 20 may apply the channel access type, CP extension value, and CAPC notified by Entry index#n shown in Table 2 to the first UL transmission to be transmitted in each RB set (corresponding to the LBT subband) and transmit. Fig.11 As shown, in RB set #0, since A-SRS is transmitted first, the channel access type, CP extension value, and CAPC notified by Entry index #n are applied to A-SRS. In addition, in RB set #1, since PUSCH is transmitted first, the channel access type, CP extension value, and CAPC notified by Entry index #n are applied to PUSCH. In addition, for the CAPC applied to A-SRS, the terminal 20 can assume a specific value (e.g., "1").

[0122] In addition, for A-SRS sent in multiple RB sets, if it is the first transmission in any RB set, the channel access type, CP extension value and CAPC can be applied, or the channel access type, CP extension value and CAPC can be applied only when it is the first transmission in all RB sets.

[0123] Fig.12 3 is a diagram showing an example (3) in which PUSCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention. Fig.12 As shown, the transmission indication of PUSCH and A-SRS can be performed through the PDCCH of DCI format 0_1.

[0124] The terminal 20 may apply the channel access type, CP extension value, and CAPC notified by Entry index#n shown in Table 2 to the first UL transmission sent in each RB set (corresponding to the LBT subband) for transmission. In addition, the terminal 20 may apply a predetermined channel access type, CP extension value, and CAPC to the UL transmission sent from the second one in each RB set. The predetermined channel access type, CP extension value, and CAPC may be specified by the specification or set by high-layer signaling (for example, notified by Entry index#x).

[0125] exist Fig.12 In , since PUSCH is transmitted first in RB set #0 and RB set #1, the channel access type, CP extension value, and CAPC notified by Entry index #n shown in Table 2 can be applied. Fig.12 In the embodiment, since the A-SRS is transmitted second in RB set #0, a predetermined channel access type, CP extension value, and CAPC can be applied.

[0126] Fig.13 4 is a diagram showing an example (4) in which PUSCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention. Fig.13 As shown, the transmission indication of PUSCH and A-SRS can be performed through the PDCCH of DCI format 0_1.

[0127] The terminal 20 may apply the channel access type, CP extension value, and CAPC notified by Entry index#n shown in Table 2 to the first UL transmission sent in each RB set (corresponding to the LBT subband) for transmission. In addition, the terminal 20 may apply a predetermined channel access type, CP extension value, and CAPC to the UL transmission sent from the second one in each RB set. The predetermined channel access type, CP extension value, and CAPC may be specified by the specification or set by high-layer signaling (for example, notified by Entry index#x).

[0128] exist Fig.13 In , since A-SRS is transmitted first in RB set #0 and RB set #1, the channel access type, CP extension value, and CAPC notified by Entry index #n shown in Table 2 can be applied. Fig.13 In the embodiment, since the PUSCH is transmitted second in RB set #0, a predetermined channel access type, CP extension value, and CAPC can be applied.

[0129] Fig.14 5 is a diagram showing an example (5) in which PUSCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention. Fig.14 As shown, the transmission indication of PUSCH and A-SRS can be performed through the PDCCH of DCI format 0_1.

[0130] The terminal 20 may apply the channel access type, CP extension value, and CAPC notified by Entry index#n shown in Table 2 to the UL transmission sent in the CO starting from the gNB of each RB set (corresponding to the LBT subband). In addition, the terminal 20 may apply a predetermined channel access type, CP extension value, and CAPC to the UL transmission sent in the CO starting from the gNB of each RB set. The predetermined channel access type, CP extension value, and CAPC may be specified by the specification or set by higher-layer signaling (for example, notified by Entry index#x).

[0131] exist Fig.14 In the example, since PUSCH is in the CO starting from the gNB of RB set #0 and A-SRS is in the CO starting from the gNB of RB set #1, the channel access type, CP extension value and CAPC notified by Entry index #n shown in Table 2 can be applied.

[0132] Fig.156 is a diagram showing an example (6) in which PUSCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention. Fig.15 As shown, the transmission indication of PUSCH and A-SRS can be performed through the PDCCH of DCI format 0_1.

[0133] The terminal 20 may apply the channel access type, CP extension value, and CAPC notified by Entry index#n shown in Table 2 to the UL transmission sent in the CO starting from the gNB of each RB set (corresponding to the LBT subband). In addition, the terminal 20 may apply a predetermined channel access type, CP extension value, and CAPC to the UL transmission sent in the CO starting from the gNB of each RB set. The predetermined channel access type, CP extension value, and CAPC may be specified by the specification or set by higher-layer signaling (for example, notified by Entry index#x).

[0134] exist Fig.15 In the example, since PUSCH is in the CO starting with the gNB of RB set #1, the channel access type, CP extension value, and CAPC notified by Entry index #n shown in Table 2 can be applied. On the other hand, since A-SRS is outside the CO starting with the gNB of RB set #0, a predetermined channel access type, CP extension value, and CAPC can be applied.

[0135] Fig.16 7 is a diagram showing an example (7) in which PUSCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention. Fig.16 As shown, the transmission indication of PUSCH and A-SRS can be performed through the PDCCH of DCI format 0_1.

[0136] When the UL transmission sent by the terminal 20 in multiple RB sets is in the CO started by the gNB in ​​a certain RB set and is outside the CO started by the gNB in ​​other RB sets, such as Fig.16 As shown, as option 1, the terminal 20 may not assume the case of being instructed to transmit such UL. In addition, as option 2, the terminal 20 may be applied with a predetermined channel access type, CP extension value, and CAPC.

[0137] Fig.17 FIG. 1 is a diagram showing an example (1) in which PUCCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention. Fig.17 As shown, the transmission indication of PUCCH and A-SRS can be performed through the PDCCH of DCI format 0_1.

[0138] The terminal 20 may apply the channel access type and CP extension value notified by the Entry index#n shown in Table 2 to the first UL transmission to be transmitted in each RB set (corresponding to the LBT subband) and transmit. Fig.17 As shown, since A-SRS is transmitted first in RB set #0, the channel access type and CP extension value notified by Entry index #n are applied to A-SRS. In addition, since PUCCH is transmitted first in RB set #1, the channel access type and CP extension value notified by Entry index #n are applied to PUCCH. In addition, for CAPC applied to A-SRS, terminal 20 can assume a specific value (e.g., "1").

[0139] Fig.18 2 is a diagram showing an example (2) in which PUCCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention. Fig.18 As shown, the transmission indication of PUCCH and A-SRS can be performed through the PDCCH of DCI format 0_1.

[0140] The terminal 20 may apply the channel access type and CP extension value notified by the Entry index#n shown in Table 2 to the first UL transmission to be transmitted in each RB set (corresponding to the LBT subband) and transmit. Fig.18 As shown, since A-SRS is transmitted first in RB set #0, the channel access type and CP extension value notified by Entry index #n are applied to A-SRS. In addition, since PUCCH is transmitted first in RB set #1, the channel access type and CP extension value notified by Entry index #n are applied to PUCCH. In addition, for CAPC applied to A-SRS, terminal 20 can assume a specific value (e.g., "1").

[0141] In addition, for A-SRS sent in multiple RB sets, if it is the first transmission in any RB set, the channel access type and CP extension value can be applied, or the channel access type and CP extension value can be applied only when it is the first transmission in all RB sets.

[0142] Fig.19 3 is a diagram showing an example (3) in which PUCCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention. Fig.19 As shown, the transmission indication of PUCCH and A-SRS can be performed through the PDCCH of DCI format 0_1.

[0143] The terminal 20 may apply the channel access type and CP extension value notified by Entry index#n shown in Table 2 to the first UL transmission sent in each RB set (corresponding to the LBT subband) for transmission. In addition, the terminal 20 may apply a predetermined channel access type and CP extension value to the UL transmission sent from the second one in each RB set. The predetermined channel access type and CP extension value may be specified by the specification or set by high-layer signaling (for example, notified by Entry index#x).

[0144] exist Fig.19 In , since the PUCCH is transmitted first in RB set #0 and RB set #1, the channel access type and CP extension value notified by Entry index #n shown in Table 2 can be applied. Fig.19 In the embodiment, since the A-SRS is transmitted second in RB set #0, a predetermined channel access type and CP extension value can be applied.

[0145] Fig. 20 FIG. 4 is a diagram showing an example (4) in which PUCCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention. Fig. 20 As shown, the transmission indication of PUCCH and A-SRS can be performed through the PDCCH of DCI format 0_1.

[0146] The terminal 20 may apply the channel access type and CP extension value notified by Entry index#n shown in Table 2 to the first UL transmission sent in each RB set (corresponding to the LBT subband) for transmission. In addition, the terminal 20 may apply a predetermined channel access type and CP extension value to the UL transmission sent from the second one in each RB set. The predetermined channel access type and CP extension value may be specified by the specification or set by high-layer signaling (for example, notified by Entry index#x).

[0147] exist Fig. 20 In , since A-SRS is transmitted first in RB set #0 and RB set #1, the channel access type and CP extension value notified by Entry index #n shown in Table 2 can be applied. Fig. 20 In the embodiment, since the PUCCH is transmitted second in RB set #0, a predetermined channel access type and CP extension value can be applied.

[0148] Fig.21 FIG. 5 is a diagram showing an example (5) in which PUCCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention. Fig.21As shown, the transmission indication of PUCCH and A-SRS can be performed through the PDCCH of DCI format 0_1.

[0149] The terminal 20 may apply the channel access type and CP extension value notified by Entry index#n shown in Table 2 to the UL transmission sent in the CO starting from the gNB of each RB set (corresponding to the LBT subband) and transmit. In addition, the terminal 20 may apply a predetermined channel access type and CP extension value to the UL transmission sent in the CO starting from the gNB of each RB set. The predetermined channel access type and CP extension value may be specified by the specification or set by higher-layer signaling (for example, notified by Entry index#x).

[0150] exist Fig.21 In the example, since PUCCH is in the CO starting from the gNB of RB set #0 and A-SRS is in the CO starting from the gNB of RB set #1, the channel access type and CP extension value notified by Entry index #n shown in Table 2 can both be applied.

[0151] Fig. 22 6 is a diagram showing an example in which PUCCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention. Fig. 22 As shown, the transmission indication of PUCCH and A-SRS can be performed through the PDCCH of DCI format 0_1.

[0152] The terminal 20 may apply the channel access type and CP extension value notified by Entry index#n shown in Table 2 to the UL transmission sent in the CO starting from the gNB of each RB set (corresponding to the LBT subband) and transmit. In addition, the terminal 20 may apply a predetermined channel access type and CP extension value to the UL transmission sent in the CO starting from the gNB of each RB set. The predetermined channel access type and CP extension value may be specified by the specification or set by higher-layer signaling (for example, notified by Entry index#x).

[0153] exist Fig. 22 In the example, since the PUCCH is in the CO starting with the gNB of RB set #1, the channel access type and CP extension value notified by Entry index #n shown in Table 2 can be applied. On the other hand, since the A-SRS is outside the CO starting with the gNB of RB set #0, a predetermined channel access type and CP extension value can be applied.

[0154] Fig.237 is a diagram showing an example (7) in which PUCCH and SRS are transmitted in a plurality of RB sets in an embodiment of the present invention. Fig.23 As shown, the transmission indication of PUCCH and A-SRS can be performed through the PDCCH of DCI format 0_1.

[0155] When the UL transmission sent by the terminal 20 in multiple RB sets is in the CO started by the gNB in ​​a certain RB set and is outside the CO started by the gNB in ​​other RB sets, such as Fig.23 As shown, as option 1, the terminal 20 may not assume the case of being instructed to transmit such UL. In addition, as option 2, the terminal 20 may be applied with a predetermined channel access type and CP extension value.

[0156] Through the above-mentioned embodiment, when multiple UL transmissions are indicated in the UL transmission of NR-U, the terminal 20 can set an appropriate channel access type, CP extension value or CAPC for each UL transmission.

[0157] That is, in a wireless communication system, when a plurality of uplink transmissions are scheduled, it is possible to determine parameters to be applied to each uplink transmission.

[0158] (Device Structure)

[0159] Next, the functional configuration examples of the base station 10 and the terminal 20 that perform the above-described processing and operation are described. The base station 10 and the terminal 20 have functions for implementing the above-described embodiments. However, the base station 10 and the terminal 20 may each have only a part of the functions of the embodiments.

[0160] <Base station 10>

[0161] Fig.24 FIG. 1 is a diagram showing an example of a functional configuration of a base station 10 in an embodiment of the present invention. Fig.24 As shown, the base station 10 includes a transmission unit 110 , a reception unit 120 , a setting unit 130 , and a control unit 140 . Fig.24 The functional configuration shown is only an example, and any functional division and functional unit name may be used as long as the operation according to the embodiment of the present invention can be performed.

[0162] The transmitting unit 110 includes a function of generating a signal to be sent to the terminal 20 side and wirelessly transmitting the signal. In addition, the transmitting unit 110 sends network node messages to other network nodes. The receiving unit 120 includes a function of receiving various signals sent from the terminal 20 and obtaining, for example, higher layer information from the received signals. In addition, the transmitting unit 110 has a function of sending NR-PSS, NR-SSS, NR-PBCH, and DL / UL control signals to the terminal 20. In addition, the receiving unit 120 receives network node messages from other network nodes.

[0163] The setting unit 130 stores preset setting information and various setting information sent to the terminal 20. The content of the setting information is, for example, settings related to NR-U communication.

[0164] As described in the embodiment, the control unit 140 performs control related to UL Grant. Functional units related to signal transmission in the control unit 140 may be included in the transmission unit 110 , and functional units related to signal reception in the control unit 140 may be included in the reception unit 120 .

[0165] <Terminal 20>

[0166] Fig.25 FIG. 2 is a diagram showing an example of a functional configuration of the terminal 20 in the embodiment of the present invention. Fig.25 As shown, the terminal 20 includes a transmitting unit 210 , a receiving unit 220 , a setting unit 230 , and a control unit 240 . Fig.25 The functional configuration shown is only an example, and any functional division and functional unit name may be used as long as the operation according to the embodiment of the present invention can be performed.

[0167] The transmitting unit 210 generates a transmission signal according to the transmission data, and transmits the transmission signal wirelessly. The receiving unit 220 receives various signals wirelessly, and obtains a higher layer signal from the received physical layer signal. In addition, 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. In addition, 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 other terminals 20 as D2D communication, and the receiving unit 220 receives PSCCH, PSSCH, PSDCH or PSBCH, etc. from other terminals 20.

[0168] The setting unit 230 stores various setting information received by the receiving unit 220 from the base station 10. In addition, the setting unit 230 also stores pre-set setting information. The content of the setting information is, for example, settings related to NR-U communication.

[0169] As described in the embodiment, the control unit 240 performs control to perform transmission associated with LBT according to UL grant. In addition, the control unit 240 controls UL transmission to which a channel access type, CP extension, or CAPC is applied according to the setting. In addition, 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.

[0170] (Hardware Structure)

[0171] The block diagram used in the description of the above embodiment ( Fig.24 and Fig.25 ) shows blocks in units of functions. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, there is no particular limitation on the implementation method of each functional block. That is, each functional block can be implemented using a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, using wires, wirelessly, etc.) and implemented using these multiple devices. The functional block can also be implemented by combining software with the above-mentioned one device or the above-mentioned multiple devices.

[0172] Functionally, it includes judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but is not limited to these. For example, the functional block (structural part) that enables the sending function is called a transmitting unit or a transmitter. In short, as mentioned above, there is no particular limitation on the implementation method.

[0173] For example, the base station 10 , the terminal 20 , and the like in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig.26 1 is a diagram showing an example of a hardware configuration of a base station 10 and a terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 may be configured as a computer device that physically includes 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.

[0174] In the following description, the word "device" may be replaced by "circuit", "equipment (device)", "unit (unit)", etc. The hardware structure of the base station 10 and the terminal 20 may be configured to include one or more devices shown in the drawings, or may be configured to exclude some devices.

[0175] Each function in the base station 10 and the terminal 20 is implemented by the following method: predetermined software (program) is read into hardware such as the processor 1001 and the storage device 1002, so that the processor 1001 performs calculations and controls the communication of the communication device 1004 or controls at least one of the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

[0176] The processor 1001 controls the entire computer by, for example, running an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a computing device, registers, etc. For example, the control unit 140, the control unit 240, etc. described above may also be implemented by the processor 1001.

[0177] In addition, the processor 1001 reads a program (program code), a software module, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and performs various processes accordingly. As a program, a program that causes the computer to execute at least a part of the actions described in the above-mentioned embodiments is used. For example, Fig.24 The control unit 140 of the base station 10 shown may also be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. In addition, for example, Fig.25 The control unit 240 of the terminal 20 shown can also be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Regarding the above-mentioned various processes, although it is described that the above-mentioned various processes are performed by one processor 1001, the above-mentioned various processes can also be performed simultaneously or sequentially by more than two processors 1001. The processor 1001 can also be installed by more than one chip. In addition, the program can also be sent from the network via a telecommunication line.

[0178] The storage device 1002 is a computer-readable recording medium, and may be composed of at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), etc. The storage device 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing the communication method involved in one embodiment of the present disclosure.

[0179] The auxiliary storage device 1003 is a computer-readable recording medium, and may be composed of at least one of an optical disk such as a CD-ROM (CompactDisc ROM), a hard disk drive, a floppy disk, a magneto-optical disk (e.g., a compressed 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, other appropriate media such as a database, a server, etc. that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0180] The communication device 1004 is hardware (transceiver device) for communicating between computers via at least one of a wired network and a wireless network, and may be referred to as a network device, a network controller, a network card, a communication module, etc. For example, in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, a transceiver antenna, an amplifier, a transceiver, a transmission path interface, etc. may also be realized by the communication device 1004. The transceiver may be installed physically or logically separately in the transmitting unit and the receiving unit.

[0181] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, an LED light, etc.). In addition, the input device 1005 and the output device 1006 may also be integrally formed (e.g., a touch panel).

[0182] In addition, the processor 1001 and the storage device 1002 and other devices are connected via 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.

[0183] In addition, the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and may implement a part or all of each functional block by using the hardware. For example, the processor 1001 may also be installed using at least one of these hardware.

[0184] (Summary of Implementation Methods)

[0185] As described above, according to an embodiment of the present invention, there is provided a terminal comprising: a receiving unit, which receives control information including information for allocating multiple uplink transmissions from a base station; a control unit, which determines parameters applied to the multiple uplinks based on the control information; and a sending unit, which applies the determined parameters to send the multiple uplinks to the base station.

[0186] Through the above-mentioned embodiment, when multiple UL transmissions are indicated in the UL transmission of NR-U, the terminal 20 can set an appropriate channel access type, CP extension value or CAPC for each UL transmission. That is, in the wireless communication system, when multiple uplink transmissions are scheduled, the parameters applied to each uplink transmission can be determined.

[0187] The parameter may be a channel access type, a CP extension value, or a CAPC. With this structure, when multiple UL transmissions are indicated in the UL transmission of NR-U, the terminal 20 can set an appropriate channel access type, a CP extension value, or a CAPC for each UL transmission.

[0188] The transmitting unit may apply the determined parameters to an uplink shared channel or an uplink control channel, and apply the predetermined parameters to an uplink reference signal. Through this structure, when multiple UL transmissions are indicated in the UL transmission of NR-U, the terminal 20 can set an appropriate channel access type, CP extension value or CAPC for each UL transmission.

[0189] The transmitting unit may apply the determined parameters to the first uplink transmission transmitted in each RB (Resource block) set, and apply the predetermined parameters to the uplink transmission transmitted from the second one. With this structure, when multiple UL transmissions are indicated in the UL transmission of NR-U, the terminal 20 can set an appropriate channel access type, CP extension value or CAPC for each UL transmission.

[0190] The transmitting unit may apply predetermined parameters to the uplink transmission when the uplink transmission is within the CO (Channel occupancy) of a certain RB set and outside the CO of another RB set. With this structure, when multiple UL transmissions are indicated in the UL transmission of NR-U, the terminal 20 can set an appropriate channel access type, CP extension value or CAPC for each UL transmission.

[0191] In addition, according to an embodiment of the present invention, a communication method is provided, in which a terminal executes the following steps: a receiving step, receiving control information containing information for allocating multiple uplink transmissions from a base station; a control step, determining parameters applied to the multiple uplinks based on the control information; and a sending step, applying the determined parameters to send the multiple uplinks to the base station.

[0192] Through the above-mentioned embodiment, when multiple UL transmissions are indicated in the UL transmission of NR-U, the terminal 20 can set an appropriate channel access type, CP extension value or CAPC for each UL transmission. That is, in the wireless communication system, when multiple uplink transmissions are scheduled, the parameters applied to each uplink transmission can be determined.

[0193] (Supplementary Implementation Methods)

[0194] The above describes the embodiments of the present invention, but the disclosed invention is not limited to such embodiments, and a person skilled in the art should understand various variations, modifications, substitutions, replacements, etc. In order to facilitate the understanding of the invention, specific numerical examples are used for description, but unless otherwise specified, these numerical values ​​are only examples, and any appropriate value may also be used. The distinction between the items in the above description is not essential to the present invention, and the items recorded in more than two items may be used in combination as needed, or the items recorded in a certain item may be applied to the items recorded in other items (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 the physical components. The actions of multiple functional units may be physically performed by one component, or the actions of one functional unit may be physically performed by multiple components. With respect to the processing procedures described in the embodiments, the order of processing may be swapped if there is no contradiction. In order to facilitate the description of the processing, the base station 10 and the terminal 20 are described using functional block diagrams, but such devices may also be implemented in hardware, software, or a combination thereof. The software that operates through the processor of the base station 10 according to the embodiment of the present invention and the software that operates through the processor of the terminal 20 according to the embodiment of the present invention may also be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server and any other appropriate storage medium.

[0195] In addition, the notification of information is not limited to the form / implementation method described in the present disclosure, and other methods may also be used. For example, the notification of information may be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), high-layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals or a combination thereof. In addition, RRC signaling may also be referred to as an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0196] Each form / implementation described in the present disclosure may also be applied to at least one of 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), CDMA 2000, 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), a system using other appropriate systems, and a next-generation system extended therefrom. In addition, a combination of a plurality of systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.) may be applied.

[0197] The processing procedures, timings, flows, etc. of each form / implementation described in this specification may be changed in order without contradiction. For example, for the method described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0198] In this specification, a specific action performed by the base station 10 is sometimes performed by its upper node according to the situation. In a network composed of one or more network nodes having the base station 10, various actions performed to communicate 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, MME or S-GW, etc., but not limited to these). In the above, the case where the other network node other than the base station 10 is one is illustrated, but the other network node may also be a combination of multiple other network nodes (for example, MME and S-GW).

[0199] The information or signals described in the present disclosure can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), and can also be input or output via a plurality of network nodes.

[0200] The input or output information can be stored in a specific location (e.g., memory) or managed using a management table. The input or output information can be rewritten, updated, or appended. The output information can also be deleted. The input information can also be sent to other devices.

[0201] The determination in the present disclosure may be performed by a value represented by 1 bit (0 or 1), by a Boolean value (Boolean: true or false), or by comparison of numerical values ​​(for example, comparison with a predetermined value).

[0202] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to commands, sets of commands, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0203] In addition, software, commands, information, etc. may be sent and received via a transmission medium. For example, when software is sent from a web page, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0204] The information, signals, etc. described in the present disclosure may also be represented by any of a variety of different technologies. For example, data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be involved in the above description as a whole may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0205] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may also be a signal (signaling). In addition, a signal may also be a message. In addition, a component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0206] The terms "system" and "network" used in this disclosure may be used interchangeably.

[0207] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​to predetermined values, or other corresponding information. For example, wireless resources may also be indicated by indexes.

[0208] The names used for the above parameters are not limiting in any way. Furthermore, the formulas etc. using these parameters may sometimes differ from those explicitly stated in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by appropriate names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

[0209] In the present disclosure, the terms "base station (BS)," "wireless base station", "base station device", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier" and the like are used interchangeably. Base stations are sometimes referred to as macrocells, small cells, femtocells, picocells, etc.

[0210] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (RRH: Remote Radio Head)). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provide communication services within the coverage area.

[0211] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0212] For mobile stations, those skilled in the art sometimes also use the following terms: 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 appropriate terms.

[0213] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. In addition, at least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a means of transportation (e.g., a car, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move 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.

[0214] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, with respect to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple terminals 20 (for example, it may also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything, etc.), the various forms / implementations of the present disclosure may also be applied. In this case, it may also be configured that the terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0215] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station may have the functions of the user terminal described above.

[0216] The terms "determining" and "determining" used in the present disclosure sometimes also include situations of various actions. "Judgment" and "determination" may, for example, include situations where matters that have been judged, calculated, calculated, processed, derived, investigated, searched (for example, searched in a table, database or other data structure), confirmed (ascertaining) are considered to be "judged" or "determined". In addition, "judgment" and "determination" may include situations where matters that have been received (for example, receiving information), transmitted (for example, transmitting information), input, output, accessed (for example, accessed data in memory) are considered to be "judged" or "determined". In addition, "judgment" and "determination" may include situations where matters that have been resolved (resolving), selected (selecting), chosen (choosing), established (establishing), compared (comparing), etc. are considered to be "judged" or "determined". That is, "judgment" and "decision" can include matters of "judgment" and "decision" of any action. In addition, "judgment (decision)" can be replaced by "assuming", "expecting", "considering", etc.

[0217] The terms "connected", "coupled" or all variations of these terms are intended to indicate any direct or indirect connection or combination between two or more elements, and may include the situation where there is one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be a physical combination or connection, a logical combination or connection, or a combination of these. For example, "access" may be used to replace "connection". In the context of the present disclosure, for two elements, it may be considered that they are "connected" or "coupled" to each other by using at least one of one or more wires, cables, and printed electrical connections, and as some non-limiting and non-inclusive examples, by using electromagnetic energy such as electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, and light (including both visible and invisible) region.

[0218] The reference signal may be referred to as RS (Reference Signal) for short, or may be referred to as a pilot signal according to the applied standard.

[0219] The phrase "according to" used in the present disclosure does not mean "only according to" unless otherwise expressly stated. In other words, the phrase "according to" means both "only according to" and "at least according to".

[0220] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not necessarily limit the number and order of these elements. These terms are used in this disclosure as a simple method to distinguish between two or more elements. Therefore, a reference to a first and a second element does not mean that only two elements can be used here or that the first element must precede the second element in any form.

[0221] The "unit" in each of the above-mentioned device structures can be replaced by a "section", "circuit", "device" or the like.

[0222] When the terms "include," "including," and variations thereof are used in the present disclosure, these terms are intended to be inclusive, as is the term "comprising." Furthermore, the term "or" used in the present disclosure does not mean an exclusive or.

[0223] A radio frame may be composed of one or more frames in the time domain. One or more frames in the time domain may also be referred to as subframes. A subframe may also be composed of one or more time slots in the time domain. A subframe may be a fixed time length (e.g., 1 ms) that is independent of a parameter set (numerology).

[0224] A parameter set may also be a communication parameter applied to at least one of the transmission and reception of a certain signal or channel. The parameter set may, for example, represent at least one of a subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, wireless frame structure, specific filtering processing performed by a transceiver in the frequency domain, specific windowing processing performed by a transceiver in the time domain, and the like.

[0225] A time 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 time slot may be a time unit based on a parameter set.

[0226] A time slot may also include multiple mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (or PUSCH) mapping type B.

[0227] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by other corresponding names.

[0228] For example, 1 subframe may also be referred to as a transmission time interval (TTI), multiple consecutive subframes may also be referred to as a TTI, and 1 time slot or 1 mini time slot may also be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1ms) in the existing LTE, or a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. In addition, the unit representing the TTI may not be a subframe, but may be referred to as a time slot, a mini time slot, or the like.

[0229] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each terminal 20 to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each terminal 20) in units of TTI. In addition, the definition of TTI is not limited to this.

[0230] TTI can be a transmission time unit of data packets (transport blocks), code blocks, code words, etc. after channel coding, or a processing unit for scheduling, link adaptation, etc. In addition, when a TTI is assigned, the time interval (for example, the number of symbols) to which a transport block, code block, code word, etc. is actually mapped can also be shorter than the TTI.

[0231] In addition, when 1 time slot or 1 mini time slot is called TTI, more than one TTI (i.e., more than one time slot or more than one mini time slot) can also constitute the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can also be controlled.

[0232] A TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0233] In addition, long TTI (e.g., normal TTI, subframe, etc.) can be replaced by TTI with a time length exceeding 1ms, and short TTI (e.g., shortened TTI, etc.) can also be replaced by TTI with a TTI length smaller than that of long TTI and greater than 1ms.

[0234] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain. In the frequency domain, it may also contain one or more consecutive subcarriers. The number of subcarriers contained in an RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers contained in an RB may be determined based on the parameter set.

[0235] In addition, the time domain of an RB may include one or more symbols, and may be of the length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. 1 TTI, 1 subframe, etc. may also be composed of one or more resource blocks.

[0236] In addition, one or more RBs may also be referred to as a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, etc.

[0237] In addition, 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 subcarrier and 1 symbol.

[0238] A bandwidth part (BWP) (also called partial bandwidth, etc.) may also represent a subset of continuous common RBs (common resource blocks) for a parameter set in a certain carrier. Here, common RBs may also be identified by the index of the RB based on the common reference point of the carrier. PRBs may also be defined by a BWP and numbered within the BWP.

[0239] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). For a UE, one or more BWPs may be configured within one carrier.

[0240] At least one of the configured BWPs may be activated, and the UE may not assume that it transmits or receives predetermined signals / channels other than the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0241] The above structures of radio frames, subframes, time slots, mini-time slots, and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP: Cyclic Prefix) length, and the like can be variously changed.

[0242] In the present disclosure, when an article is added by translation, such as a, an, and the in English, for example, the present disclosure also includes the case where the noun following the article is in plural form.

[0243] In the present disclosure, the phrase "A and B are different" may also mean "A and B are different from each other". In addition, the phrase may also mean "A and B are different from C, respectively". The phrases such as "separate" and "combine" may also be interpreted as "different".

[0244] Each form / implementation described in the present disclosure may be used alone or in combination, and may be switched according to execution. In addition, notification of scheduled information is not limited to being performed explicitly (e.g., notification of "yes X"), but may also be performed implicitly (e.g., not notifying the scheduled information).

[0245] In addition, in the present disclosure, A-SRS is an example of an uplink reference signal.

[0246] The present disclosure is described in detail above, but it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as a modification and variation without departing from the subject matter and scope of the present disclosure as determined by the claims. Therefore, the purpose of the description of the present disclosure is to illustrate and not to have any limiting meaning on the present disclosure.

[0247] This international patent application is based upon and claims the benefit of priority from Japanese Patent Application No. 2020-029728 filed on February 25, 2020, the entire contents of which are hereby incorporated by reference into this application.

[0248] Description of labels:

[0249] 10 Base Station

[0250] 110 Sending Department

[0251] 120 Receiving Department

[0252] 130 Setting Department

[0253] 140 Control Department

[0254] 20 Terminal

[0255] 210 Sending Department

[0256] 220 Receiving Department

[0257] 230 Setting Department

[0258] 240 Control Department

[0259] 1001 Processor

[0260] 1002 Storage Device

[0261] 1003 Auxiliary storage device

[0262] 1004 Communication device

[0263] 1005 Input Device

[0264] 1006 Output Device

Claims

1. A terminal having: a receiving unit that receives, from a base station, a single downlink control information for scheduling a plurality of uplink transmissions; and A control unit that applies a channel access of a channel access type specified by the downlink control information to perform a first uplink transmission scheduled by the downlink control information, and applies a channel access of a predetermined channel access type to perform a second or subsequent uplink transmission scheduled by the downlink control information.

2. The terminal according to claim 1, wherein: The control unit applies at least one of a CP extension value and a CAPC specified based on the downlink control information to the channel access for the first uplink transmission, wherein the CP is a cyclic prefix and the CAPC is a channel access priority class.

3. The terminal according to claim 1 or 2, wherein: The second and subsequent uplink transmissions are within the COT or outside the COT, wherein the COT is a channel occupation time.

4. The terminal according to claim 1 or 2, wherein: The multiple uplink transmissions include transmission of a PUSCH and transmission of an SRS, wherein the PUSCH is a physical uplink shared channel and the SRS is a sounding reference signal.

5. The terminal according to claim 1 or 2, wherein: The multiple uplink transmissions include transmission of a PUCCH and transmission of an SRS, wherein the PUCCH is a physical uplink control channel and the SRS is a sounding reference signal.

6. A base station, comprising: a transmitting unit that transmits a single downlink control information for scheduling a plurality of uplink transmissions; and A control unit that performs such control as: receiving the first uplink transmission scheduled by the downlink control information and applying a channel access of a channel access type specified based on the downlink control information, and receiving the second and subsequent uplink transmissions scheduled by the downlink control information and applying a channel access of a predetermined channel access type.

7. A communication system comprising a base station and a terminal, The base station includes a transmission unit that transmits a single downlink control information for scheduling a plurality of uplink transmissions. The terminal has: a receiving unit that receives the single downlink control information for scheduling a plurality of uplink transmissions from the base station; and A control unit that applies a channel access of a channel access type specified by the downlink control information to perform a first uplink transmission scheduled by the downlink control information, and applies a channel access of a predetermined channel access type to perform a second or subsequent uplink transmission scheduled by the downlink control information.

8. A communication method of a terminal, comprising: A receiving step of receiving, from a base station, a single downlink control information for scheduling a plurality of uplink transmissions; as well as A control step, applying a channel access of a channel access type specified based on the downlink control information to perform the first uplink transmission scheduled by the downlink control information, and applying a channel access of a predetermined channel access type to perform the second and subsequent uplink transmissions scheduled by the downlink control information.

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