Terminal, base station, and feedback method

Abstract

Provided is a terminal comprising: a control unit for expanding a DL slot that corresponds to a parameter value indicating the transmission timing of feedback information to thereby determine a plurality of DL slots that are likely to be scheduled using one item of control information received from a base station, and determining a candidate reception opportunity in the plurality of DL slots; and a transmission unit for transmitting feedback information for the candidate reception opportunity in the plurality of DL slots to the base station.

Description

[Technical Field]

[0001] The present invention relates to a terminal, a base station, and a feedback method in a wireless communication system. [Background technology]

[0002] For NR (New Radio) (also known as "5G"), the successor system to LTE (Long Term Evolution), technologies that satisfy requirements such as a large-capacity system, high data transmission speed, low latency, simultaneous connection of many terminals, low cost, and low power consumption are being considered (for example, Non-Patent Document 1). In addition, for NR, the use of high frequency bands such as 52.6 to 114.25 GHz is being considered.

[0003] In addition, in order to expand the frequency band, the NR system supports the use of frequency bands different from the frequency bands licensed to telecommunications carriers (operators) (also called unlicensed bands, unlicensed carriers, or unlicensed CCs). [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 38.300 V16.4.0 (2020-12) [Non-patent document 2] 3GPP TS 38.331 V16.3.0 (2020-12) [Non-patent document 3] 3GPP TS 38.213 V16.4.0 (2020-12) [Non-patent document 4] 3GPP TS 38.321 V16.3.0 (2020-12) [Non-patent document 5] 3GPP TS 38.214 V16.4.0 (2020-12) Summary of the Invention [Problem to be solved by the invention]

[0005] As slot lengths become shorter with the use of higher frequency bands, it is expected that a base station will schedule multiple PDSCHs for a terminal using one piece of control information (DCI).

[0006] However, the conventional technologies described in Non-Patent Documents 1 to 5, etc., do not specify how to generate and transmit feedback information (specifically, HARQ-ACK information) when scheduling multiple PDSCHs with one DCI, and there is a possibility that the conventional technologies will not be able to transmit feedback information appropriately.

[0007] The present invention has been made in view of the above points, and aims to provide a technique that enables appropriate transmission of feedback information when scheduling multiple PDSCHs using one control information. [Means for solving the problem]

[0008] According to the disclosed technology, Indicates time domain resource allocation TDRA Set of to, 1 or more There is one TDRA containing a value indicating the start position and length of the resource for data transmission. a control unit that generates a new set of parameter values ​​by adding a new parameter value to the set of parameter values ​​indicating the timing of transmitting feedback information, and determines a plurality of candidate receiving opportunities corresponding to the new set; a transmitter configured to transmit feedback information corresponding to the plurality of candidate reception opportunities to a base station. A terminal, The number of the DL slot in the set of DL slots in one TDRA is m. i In the case where the numerology of the downlink is μ_DL and the numerology of the uplink is μ_UL, the control unit sets ceil(m i / (2 μ_DL-μ_UL ) is added to the new parameter value A terminal is provided. [Effects of the Invention]

[0009] According to the disclosed technology, a technology is provided that enables appropriate transmission of feedback information when scheduling multiple PDSCHs using one piece of control information. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 2] 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 3] FIG. 10 is a diagram illustrating an example of a band. [Figure 4] FIG. 10 is a diagram illustrating the relationship between SCS and symbol length. [Figure 5] FIG. 1 is a diagram illustrating an example of a basic procedure according to an embodiment of the present invention. [Figure 6] FIG. 10 is a diagram illustrating a method for determining a PDSCH slot window. [Figure 7] FIG. 10 is a diagram illustrating a method for determining a PDSCH slot window. [Figure 8] FIG. 10 is a diagram for explaining a method for determining candidate reception opportunities in each slot. [Figure 9] FIG. 10 is a diagram illustrating an example of a HARQ-ACK codebook. [Figure 10] FIG. 10 is a diagram illustrating scheduling of multiple PDSCHs using one DCI. [Figure 11] FIG. 10 is a diagram illustrating an example of a TDRA table according to the first embodiment. [Figure 12] FIG. 4 is a diagram for explaining a method for determining a plurality of PDSCH slots in the first embodiment. [Figure 13] FIG. 4 is a diagram for explaining a method for determining candidate receiving opportunities in the first embodiment. [Figure 14] FIG. 4 is a diagram for explaining a method for determining candidate receiving opportunities in the first embodiment. [Figure 15] FIG. 10 is a diagram illustrating an example of a HARQ-ACK codebook in the second embodiment. [Figure 16] FIG. 10 is a diagram illustrating an example of a TDRA table according to the second embodiment. [Figure 17] FIG. 10 is a diagram illustrating a method for determining an extended PDSCH slot window in a second embodiment. [Figure 18] FIG. 10 is a diagram illustrating a method for determining an extended PDSCH slot window in a second embodiment. [Figure 19] FIG. 10 is a diagram illustrating a method for determining an extended PDSCH slot window in a second embodiment. [Figure 20] FIG. 10 is a diagram illustrating a method for determining an extended PDSCH slot window in a second embodiment. [Figure 21] FIG. 10 is a diagram illustrating an example of a TDRA table according to the second embodiment. [Figure 22] FIG. 10 is a diagram illustrating a method for determining an extended PDSCH slot window in a second embodiment. [Figure 23] FIG. 10 is a diagram illustrating a method for determining an extended PDSCH slot window in a second embodiment. [Figure 24] FIG. 10 is a diagram illustrating a method for determining an extended PDSCH slot window in a second embodiment. [Figure 25] FIG. 10 is a diagram illustrating a method for determining an extended PDSCH slot window in a second embodiment. [Figure 26] FIG. 10 is a diagram for explaining a method for determining candidate receiving opportunities in the second embodiment. [Figure 27] 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention. [Figure 28] FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to the embodiment of the present invention. [Figure 29] 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0012] Existing technology is used as appropriate when operating the wireless communication system according to the embodiment of the present invention. The existing technology is, for example, the existing NR. The wireless communication system (base station 10 and terminal 20) according to the present embodiment basically operates in accordance with existing regulations (e.g., Non-Patent Documents 1 to 5). However, to solve problems when high frequency bands are used, the base station 10 and terminal 20 also perform operations that are not specified in the existing regulations. In the explanation of the embodiments described below, operations that are not specified in the existing regulations will be mainly explained. Note that all numerical values ​​described below are examples.

[0013] Furthermore, in the embodiments of the present invention, the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, Flexible Duplex, etc.).

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

[0015] (System Configuration)

[0016] Fig. 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. As shown in Fig. 1, the wireless communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20. Although Fig. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each.

[0017] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a wireless signal are defined in the time domain and the frequency domain.

[0018] OFDM is used as the radio access method. In the frequency domain, subcarrier spacing (SCS) of at least 15 kHz, 30 kHz, 120 kHz, and 240 kHz is supported. Regardless of the SCS, a resource block is composed of a predetermined number of consecutive subcarriers (e.g., 12).

[0019] When performing initial access, terminal 20 detects an SSB (SS / PBCH block) and identifies the SCS in the PDCCH and PDSCH based on the PBCH included in the SSB.

[0020] In the time domain, a slot is made up of multiple OFDM symbols (for example, 14 symbols regardless of the subcarrier spacing). Hereinafter, an OFDM symbol is called a "symbol." A slot is the scheduling unit. Subframes with a duration of 1 ms are defined, and a frame consisting of 10 subframes is defined. Note that the number of symbols per slot is not limited to 14.

[0021] As shown in Fig. 1, a base station 10 transmits control information or data to a terminal 20 in a DL (Downlink) and receives control information or data from the terminal 20 in an UL (Uplink). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming. Furthermore, both the base station 10 and the terminal 20 are capable of applying MIMO (Multiple Input Multiple Output) communication to DL or UL. Furthermore, both the base station 10 and the terminal 20 may communicate via a SCell (Secondary Cell) and a PCell (Primary Cell) using CA (Carrier Aggregation).

[0022] The terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, an M2M (Machine-to-Machine) communication module, etc. As shown in Fig. 1, the terminal 20 receives control information or data from the base station 10 via DL and transmits control information or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system.

[0023] Terminal 20 can perform carrier aggregation, which aggregates multiple cells (multiple CCs (component carriers)) to communicate with base station 10. In carrier aggregation, one PCell (primary cell) and one or more SCells (secondary cells) are used. Also, a PUCCH-SCell having a PUCCH may be used.

[0024] Fig. 2 shows an example of the configuration of a wireless communication system when NR-DC (NR-Dual connectivity) is implemented. As shown in Fig. 2, a base station 10A serving as an MN (Master Node) and a base station 10B serving as an SN (Secondary Node) are provided. The base station 10A and the base station 10B are each connected to a core network. The terminal 20 communicates with both the base station 10A and the base station 10B.

[0025] A cell group provided by base station 10A, which is an MN, is called an MCG (Master Cell Group), and a cell group provided by base station 10B, which is an SN, is called an SCG (Secondary Cell Group). In addition, in a DC, an MCG is composed of one PCell and one or more SCells, and an SCG is composed of one PSCell (Primary SCell) and one or more SCells. Note that in this specification, a CC (Component Carrier) and a cell may be used synonymously. Also, a PCell and a PSCell may be referred to as an SPCell.

[0026] In the wireless communication system according to this embodiment, when an unlicensed band is used, LBT (Listen Before Talk) is executed. The base station 10 or the terminal 20 senses a signal, and transmits if the sensing result is idle, and does not transmit if the sensing result is busy. Note that LBT is not necessarily performed in an unlicensed band, and there may be cases where LBT is not performed in an unlicensed band.

[0027] (Regarding frequency bands) Fig. 3 shows examples of frequency bands used in the existing NR and frequency bands used in the wireless communication system according to this embodiment. The existing NR has two frequency bands (which may also be referred to as frequency ranges): FR1 (0.41 GHz to 7.125 GHz) and FR2 (24.25 GHz to 52.6 GHz). As shown in Fig. 3, FR1 supports SCSs of 15 kHz, 30 kHz, and 60 kHz, and a bandwidth (BW) of 5 to 100 MHz. FR2 supports SCSs of 60 kHz, 120 kHz, and 240 kHz (SSB only), and a bandwidth (BW) of 50 to 400 MHz.

[0028] The wireless communication system according to this embodiment is assumed to use a frequency band higher than 52.6 GHz (for example, 52.6 GHz to 114.25 GHz) that is not used in the existing NR. This frequency band may be referred to as FR4, for example.

[0029] Furthermore, in this embodiment, it is assumed that, with the expansion of the frequency band as described above, an SCS wider than the existing SCS will be used. For example, an SCS of 480 kHz or an SCS wider than 480 kHz will be used as the SCS for SSB and PDCCH / PDSCH.

[0030] In the high frequency band, it is expected that multiple narrow beams will be used to compensate for the large propagation loss, and the SCS will be wider than the existing FR2 SCS (for example, 480 kHz, 960 kHz).

[0031] Figure 4 shows the relationship between SCS and symbol length (symbol time length). As shown in Figure 4, as the SCS becomes wider, the symbol length (symbol time length) becomes shorter. Also, assuming that the number of symbols per slot is constant (i.e., 14 symbols), as the SCS becomes wider, the slot length becomes shorter.

[0032] In a wireless communication system, a terminal 20 transmits HARQ-ACK information, in which a HARQ-ACK information bit value is set in a HARQ-ACK CodeBook (HARQ-ACK CB), as feedback to the base station 10 in response to data reception via a PDSCH from the base station 10. Note that transmitting / receiving data via a PDSCH may also be referred to as transmitting / receiving a PDSCH.

[0033] However, as described above, when the slot length is shortened due to the use of a high frequency band, it is assumed that multiple PDSCHs will be scheduled with one DCI scheduling. Based on such an assumption, it is not clear in the prior art how to generate the HARQ-ACK CB.

[0034] Hereinafter, an embodiment relating to generation of HARQ-ACK CB and transmission of HARQ-ACK information in a mode in which multiple PDSCHs are scheduled by scheduling using one DCI will be described.

[0035] (Basic operation) First, an example of a basic operation in the wireless communication system of this embodiment will be described with reference to FIG.

[0036] In S100, the terminal 20 transmits capability information (UE capability) to the base station 10. Using this capability information, the base station 10 can determine, for example, the content of the information to be transmitted to the terminal 20 in S101 and S102 below.

[0037] In S101, the base station 10 transmits configuration information to the terminal 20 by an RRC message, and the terminal 20 receives the configuration information. The configuration information is, for example, configuration information related to a K1 set and a TDRA table, as described below. Note that the K1 set and the TDRA table may both be notified from the base station 10 to the terminal 20, or may be predetermined in specifications or the like, and the base station 10 and the terminal 20 may use the predetermined ones. The TDRA table may also be called time domain resource allocation configuration information.

[0038] In S102, the base station 10 transmits scheduling (allocation information) for multiple PDSCHs by DCI to the terminal 20, and the terminal 20 receives the DCI. The DCI also includes information about uplink resources for transmitting HARQ-ACK information.

[0039] In S103, the terminal 20 receives the PDSCH based on the scheduling information in the DCI, and in S104 transmits HARQ-ACK information to the base station 10. The base station 10 receives the HARQ-ACK information.

[0040] (Type 1 HARQ-ACK CB generation) This embodiment is directed to Type 1 HARQ-ACK CB. First, a method for generating Type 1 HARQ-ACK CB in R16 (Release 16) will be described (see Non-Patent Document 3, etc.). In the following description, a case will be described in which PUCCH is used as a channel for transmitting HARQ-ACK information, but the channel for transmitting HARQ-ACK information may also be PUSCH.

[0041] First, the general flow is divided into the following steps A and B. The flow itself is the same in the first and second embodiments.

[0042] In step A, terminal 20 determines HARQ-ACK occasions indicating possible received PDSCHs. The bit indexes in the HARQ-ACK occasions represent the reception opportunities for each PDSCH. The HARQ-ACK occasions may also be referred to as a HARQ-ACK codebook.

[0043] In step B, the terminal 20 determines whether or not the OARQ-ACK in the HARQ-ACK occasions determined in step A is true. ACK For example, if data is received successfully at a certain reception opportunity, the corresponding bit becomes a bit indicating ACK.

[0044] Then, the terminal 20 transmits to the base station 10 HARQ-ACK information in which the value of the HARQ-ACK information bit is set to the bit position of each reception opportunity.

[0045] More specifically, Step A consists of the following Steps A-1 and A-2.

[0046] <Step A-1> The terminal 20 determines the PDSCH slot window based on the set K1 set.

[0047] The K1 set C(K1) = {1, 2, 3, 4}, and the uplink and downlink numerologies are equal (μ DL =μ UL An example of a PDSCH slot window in this case is shown in FIG.

[0048] 6, the upper part shows the serving cell c that receives the PDSCH, and the lower part shows the PUCCH cell. This also applies to the subsequent figures.

[0049] K1 indicates the distance (number of slots) between the slot in which the PDSCH is received and the slot in which the PUCCH is transmitted, as viewed from the PUCCH cell. In other words, K1 is a parameter value indicating the timing of transmitting feedback. In the case of FIG. 6, since the PUCCH is transmitted in slot n+4 of the PUCCH cell, slots n to n+3 of the serving cell c are determined as the PDSCH slot window (the time window of slots in which the PDSCH may be received).

[0050] K1 set C(K1) = {1,2,3,4,5}, and μ DL >μ UL An example of a PDSCH slot window in this case is shown in Figure 7. In the case of Figure 7, since the PUCCH is transmitted in slot n+5 of the PUCCH cell, slots 2n to 2n+9 of serving cell c are determined as the PDSCH slot window (a time window of slots in which the PDSCH may be received). For example, slot 2n of the serving cell corresponds to the time position of slot n of the PUCCH cell, so slot n+5, which is five slots later (K1=5) based on the slot length in the PUCCH cell, becomes the slot for transmitting the PUCCH.

[0051] <Step A-2> In step A-2, terminal 20 determines candidate PDSCH reception occasions for each slot in the window determined in step A-2. Specifically, it executes the steps S1 to S3 as follows.

[0052] In S1, the candidate PDSCH reception occasions are associated with a set R (a set of rows) of a Time Domain Resource Allocation (TDRA) table.

[0053] In S2, the overlapping part with the part where the UL is set by TDD-UL-DL-ConfigurationCommon and TDD-UL-DL-ConfigDedicated is excluded from the allocation information (SLIV) in the TDRA table.

[0054] In S3, for candidate PDSCH reception occasions that overlap in the time domain, candidate PDSCH reception occasions are determined according to a predetermined rule.

[0055] An example of determining candidate PDSCH reception occasions in a certain slot n will be described with reference to Figure 8. In the TDRA table shown in Figure 8(a), one row corresponds to one SLIV (allocation information: indicating the start symbol and symbol length in the slot), and there are nine types, each identified by a row index (RI). Note that the RI is specified by DCI, and terminal 20 recognizes the specified SLIV as the actual PDSCH reception occasion. Furthermore, K1 is also specified by DCI.

[0056] (b) shows the SLIVs of all RIs defined in the TDRA table on a slot-by-slot basis. For convenience of notation, three slots are shown, but this shows that there are nine types of SLIV candidates in one slot.

[0057] Here, as shown in (c), RI2, RI3, and RI8 overlap with semi-static UL symbols and are therefore excluded from the candidate PDSCH reception occasions.

[0058] After excluding RI2, RI3, and RI8, the SLIVs are RI0, RI1, and RI4 to RI7. As shown in (d) and (e), RI0 and RI4 overlap, and RI1 overlaps with RI5 and RI6, but according to a predetermined rule, RI0 and RI4 become one occasion as candidate PDSCH reception occasions and are assigned index 0, and RI1 and RI5 also become one occasion as candidate PDSCH reception occasions and are assigned index 1. As a result, the candidate PDSCH reception occasions (M A,c ) becomes {0,1,2,3}.

[0059] By performing the above processing for each slot, as shown in FIG. 9, M PDSCH reception occasions consisting of candidate PDSCH reception occasions for each slot in the PDSCH slot window are obtained. A,c is generated.

[0060] (Multi-PDSCH / PUSCH scheduling) In this embodiment, multi-PDSCH / PUSCH scheduling is supported, in which multiple PDSCHs (or multiple PUSCHs) are scheduled by one scheduling using DCI. Multi-PDSCH scheduling will be described below.

[0061] The TDRA table used in multi-PDSCH scheduling is, for example, a table having one or more SLIVs in each row. Furthermore, multiple PDSCHs scheduled by one DCI may or may not be contiguous in time.

[0062] More specifically, the TDRA table is extended so that each row indicates up to eight PDSCHs, each with a different SLIV and mapping type. The number of PDSCHs scheduled by one DCI is implicitly indicated by the number of valid SLIVs in the row of the TDRA table indicated by the DCI.

[0063] (HARQ-ACK in multi-PDSCH scheduling) In this embodiment, terminal 20 can transmit HARQ-ACK feedback for multiple PDSCHs scheduled by multi-PDSCH scheduling, using the same PUCCH.

[0064] That is, HARQ-ACK information corresponding to multiple PDSCHs scheduled by one DCI that schedules multiple PDSCHs is multiplexed into one PUCCH in a slot determined based on K1.

[0065] Here, as shown in FIG. 10, K1 is the slot offset between the slot in the last PDSCH scheduled by the DCI and the slot carrying HARQ-ACK information corresponding to the scheduled multiple PDSCHs.

[0066] Note that K1 is a value indicated by the PDSCH-to-HARQ_feedback timing indicator field in the DCI. If the PDSCH-to-HARQ_feedback timing indicator field is not present in the DCI, K1 is a value given by dl-DataToUL-ACK.

[0067] In addition, in this embodiment, the following options 1, 1a, and 2 are available for generating a type 1 HARQ-ACK codebook corresponding to DCI that schedules multiple PDSCHs.

[0068] Option 1: The terminal 20 determines candidate PDSCH reception occasions based on each SLIV in each row in the TDRA table and an extension of the K1 set.

[0069] Option 1a: The terminal 20 determines candidate PDSCH reception occasions based on each SLIV in each row in the TDRA table.

[0070] Option 2: The terminal 20 determines candidate PDSCH reception occasions based on the last SLIV in each row in the TDRA table.

[0071] This embodiment is directed to the above options 1 and 1a. Below, an example will be described of how to construct a HARQ-ACK CB when candidate PDSCH reception occasions are determined based on all SLIVs of each row of the TDRA table. Below, examples 1 and 2 will be described. Examples 1 and 2 may be implemented in combination.

[0072] In both the first and second embodiments, in generating the HARQ-ACK CB, basically the same processing as the above-mentioned step A (i.e., step A-1, step A-2) and step B are executed. In the first and second embodiments, step B is the same as the above-mentioned step B. In the following, the processing contents corresponding to the above-mentioned step A (i.e., step A-1, step A-2) will be mainly explained. In the following explanation, for convenience, the names step A-1 and step A-2 will be used.

[0073] Example 1 <Step A-1> In the first embodiment, the terminal 20 selects each K in the K1 set C(K1). 1,k On the other hand, K 1,k The PDSCH slots (corresponding to the PDSCH slots in the PDSCH slot window described above) associated with the DL slot(s) are mapped.

[0074] Step A-1 of Example 1 includes the following Alt1 and Alt2.

[0075] <alt1> Alt1 says "K 1,k PDSCH slots related with corresponding DL slot(s) for K 1,k ) is determined based on the maximum slot length that can be scheduled by a TDRA row included in the TDRA table, that is, the difference between the K2 values ​​corresponding to the first and last SLIVs in each TDRA row.

[0076] <alt2> Alt2 has options 1 and 2 below.

[0077] Option 1: "K 1,k The PDSCH slots associated with the DL slot(s) corresponding to the last slot in the TDRA table row are 1,k DL slot n corresponding to D,k The term "TDRA table spanning slots" refers to the number of slots spanning a row in the TDRA table when it is assumed that the number of slots is 1 or 2.

[0078] Option 2: TDRA rows that are inconsistent with the DL / UL configuration in TDD (e.g., TDRA rows containing assignments to be scheduled in UL slots and semi-statically configured slots) are excluded from the TDRA rows to be considered, and Option 1 is applied to the remaining TDRA rows to obtain "K 1,k PDSCH slots related with corresponding DL slot(s) for K 1,k ) is determined.

[0079] Here, a specific example of option 1 of Alt2 will be described. It is assumed that the TDRA table is the TDRA table shown in Fig. 11. When looking at the entire row of the TDRA table shown in Fig. 11, the allocation of PDSCH is in slot n. D -5, slot n D -4, slot n D -2, slot n D -1, and slot n D In each row and each slot, an SLIV is assigned as shown in the figure. For example, in the first row, slot n D is assigned SLIV#1.

[0080] In the case of such a TDRA table, if the numerology of the uplink and downlink is the same, i.e., μ DL =μ UL If K is a value in the K1 set, 1,k The slot corresponding to slot n D,k Let us assume that:

[0081] In Example 1, slot n D,k corresponds to the last slot of the multiple PDSCH slots to be scheduled. Therefore, in the case of the TDRA table of FIG. 11, the candidate PDSCH reception slots (PDSCH slot window) are “slot n D,k -5, slot n D,k -4, slot n D,k -2, slot n D,k -1, slot n D,k " becomes.

[0082] If, μ DL >μ UL If so, as shown in the example of Figure 7 above, K 1,k For example, as shown in the example in Figure 12, μ DL =μ UL +1, then K 1,k The DL slot corresponding to is slot n D,k and slot n D,k +1. In this case, K 1,k For each of the multiple DL slots corresponding to the PDSCH slots, candidate PDSCH reception slots are generated by arranging the PDSCH slots based on the TDRA table.

[0083] In other words, μ DL >μ UL If K 1,k The corresponding candidate PDSCH reception slot (window) is "[slot n D,k Multiple slots related to slot n D,k +1 related multiple slots], ..."

[0084] μ DL =μ UL +1, the terminal 20 receives the data in slot n D,k Multiple slots for "slot n D,k -5, slot n D,k -4, slot n D,k -2, slot n D,k -1, slot n D,k " and slot n D,k Multiple slots for +1 are "slot n D,k -4, slot n D,k -3, slot n D,k -1, slot n D,k , slot n D,k +1". Therefore, "PDSCH slots related with DL slot(s) for K 1,k " (K 1,k The PDSCH slots associated with the DL slots for the respective DMA channels are as shown in FIG.

[0085] As shown in Figure 12, n U is the number of the PUCCH slot, then slot n D n in D is "(n U -K 1,k )·2 μ_DL-μ_UL " can be calculated as the integer part of

[0086] <Example 1: Step A-2> After determining multiple PDSCH slots, which are DL slots that may receive the PDSCH, as described above, terminal 20 determines candidate occasions (candidate reception opportunities) for each slot. That is, here, it is determined which SLIV may be assigned to each slot. In other words, for each slot, one or more SLIVs that are candidates for assignment are determined. There are two determination methods, Alt1 and Alt2, as follows:

[0087] <Example 1, Step A-2, Alt1> In Alt1, the terminal 20 uses all types of SLIVs in all rows of the TDRA table to determine candidate occasions in each slot of the multiple PDSCH slots.

[0088] For example, when the TDRA table is as shown in FIG. 11, all types of SLIVs are SLIVs #1 to #7. Therefore, in this case, terminal 20 uses SLIVs #1 to #7 to determine candidate PDSCH reception occasions for each slot. For example, in the example shown in FIG. 12, 1,k In the case of multiple PDSCH slots for D,k -5, slot n D,k -4, slot n D,k -2, slot n D,k -1, slot n D,k , slot n D,k -4, slot n D,k -3, slot n D,k -1, slot n D,k , slot n D,k For each slot in "+1", SLIV#1 to #7 will be candidates for the occasions that will be finally decided.

[0089] Terminal 20 uses the same method as the existing technology of R16 to select all or some of SLIVs #1 to #7 in each slot based on UL collision check and predetermined rules, and sets them as candidate PDSCH reception occasions.

[0090] If the TDRA rows to be considered have already been excluded from those that are inconsistent with the TDD DL / UL configuration, the UL collision check is not required.

[0091] <Example 1, Step A-2, Alt2> In Alt2, the terminal 20 determines whether the last slot of each row of the TDRA table is slot n among all types of SLIVs in each slot of the multiple PDSCH slots. D Assuming that the last slot of each row of the TDRA table corresponds to slot n, the SLIV used to notify the start symbol and symbol length in the slot is used to determine the candidate occasions. D Also, μ DL >μ UL In the case of K 1,k Each of the multiple DL slots corresponding to corresponds to the last slot of each row of the TDRA table.

[0092] For example, if the TDRA table is as shown in FIG. 11, as shown in FIG. 11, slot n D The only SLIV in -5 is SLIV#5, and slot n D The SLIVs at -4 are SLIV#1 and #2, and slot n D The only SLIV in -2 is SLIV#1, and slot n D The SLIVs in slot n are SLIVs #1, #3, and #6. D The SLIVs in are SLIV#1, #4, and #7. These are candidates for the occasions that are finally determined in each slot.

[0093] In the example shown in Figure 12, K 1,k In the case of multiple PDSCH slots for D,k -5, slot n D,k -4, slot n D,k -2, slot n D,k -1, slot n D,k , slot n D,k -4, slot n D,k -3, slot n D,k -1, slot n D,k , slot n D,k The set of SLIVs selected as described above for each slot in "+1" becomes candidates for the occasions to be finally determined.

[0094] The terminal 20 performs UL collision check using the same method as the existing technology of R16, and selects all or part of the set of SLIVs in each slot based on a predetermined rule to set them as candidate PDSCH reception occasions. Note that when Alt1 and Alt2 are compared, Alt2 has lower redundancy than Alt1.

[0095] If the TDRA rows to be considered have already been excluded from those that are inconsistent with the TDD DL / UL configuration, the UL collision check is not required.

[0096] As a variation other than the above example, the SLIV for each slot may be defined in advance in a specification or the like, and the base station 10 and the terminal 20 may determine candidate PDSCH reception occasions based on the SLIV defined in the specification.

[0097] (Example 2: Step A-1) Next, a second embodiment will be described. First, step A-1 will be described. In the second embodiment, as shown in FIG. 15, terminal 20 determines DL slots included in an extended PDSCH slot window obtained by extending the PDSCH slot window as slots to be targeted for candidate PDSCH reception occasions. There are two options (option 2-1 and option 2-2) for determining the PDSCH slot window. Each option will be described below.

[0098] <Example 2: Step A-1, Option 2-1> In option 2-1, the terminal 20 determines the extended PDSCH slot window based on the maximum slot duration (denoted as M) from the first PDSCH slot to the last PDSCH slot in which PDSCH reception is possible.

[0099] Note that M may be a value obtained by adding 1 to the maximum value of the difference between the K2 values ​​for the first SLIV and the last SLIV in each TDRA row.

[0100] More specifically, there are Option 2-1A and Option 2-1B below.

[0101] <Option 2-1A> In option 2-1A, terminal 20 directly expands the PDSCH slot window.

[0102] That is, the terminal 20 first empties the extended PDSCH slot window. Next, the terminal 20 empties each slot n in the original PDSCH slot window. D,k For each i from 0 to M-1 (0≦i <M)、PDSCHスロット(n D,k -i) to the corresponding PDSCH slot (n D,k -i) is added to the extended PDSCH slot window if it is not already present in the extended PDSCH slot window. Note that the original PDSCH slot window is the PDSCH slot window when no extension is performed, as shown in Figures 6 and 7.

[0103] A specific example of option 2-1A will be described with reference to Figures 16 and 17. Figure 16 is an example of the TDRA table used here. As shown in Figure 16, the maximum slot period M=6.

[0104] 17 shows an example in which the original PDSCH slot window is slot n+5 and slot n+6. Here, an example in which processing starts from slot n+6 out of slot n+5 and slot n+6 will be described.

[0105] After emptying the extended PDSCH slot window, terminal 20 adds slot n+6 (i=0), slot n+5 (i=1), slot n+4 (i=2), slot n+3 (i=3), slot n+2 (i=4), and slot n+1 (i=5) to the extended PDSCH slot window for slot n+6. For slot n+5, slot n+5 (i=0), slot n+4 (i=1), slot n+3 (i=2), slot n+2 (i=3), and slot n+1 (i=4) already exist, so only slot n (i=5) is added. As a result, the extended PDSCH slot window shown in FIG. 17 is obtained.

[0106] <Option 2-1B> In option 2-1B, terminal 20 obtains extended K1 set C'(K1) by extending K1 set C(K1). Terminal 20 determines the extended PDSCH slot window based on the extended K1 set C'(K1) using the same procedure as the procedure for determining the PDSCH slot window in R16.

[0107] Specifically, the terminal 20 first empties the expanded K1 set C'(K1). Next, the terminal 20 empties each K 1,k For each i from 0 to M-1 (0≦i <M)、「K 1,k +ceil(i / (2 μ_DL-μ_UL ))" to C'(K1) if that value is not already present in C'(K1).

[0108] A specific example of the case where μDL=μUL in option 2-1B will be described with reference to Fig. 18. The TDRA table is as shown in Fig. 16, and the maximum slot period M=6.

[0109] 18 shows an example in which C(K1) is {1, 2}. Here, an example in which processing starts from K1=1 out of K1=1 and 2 will be described.

[0110] After emptying C'(K1), terminal 20 adds K1=1(i=0), K1=2(i=1), K1=3(i=2), K1=4(i=3), K1=5(i=4), and K1=6(i=5) to C'(K1) for the original K1=1. For the original K1=2, K1=2(i=0), K1=3(i=1), K1=4(i=2), K1=5(i=3), and K1=6(i=4) already exist, so only K1=7(i=5) is added.

[0111] As a result, C'(K1)={1, 2, 3, 4, 5, 6, 7}, and the extended PDSCH slot window can be obtained as shown in FIG.

[0112] Figure 19 shows that C(K1) is {1,2} and μ UL -μ DL = 1. In this case, "K 1,k +ceil(i / (2 μ_DL-μ_UL ))" is "K 1,k +ceil(2i)".

[0113] Here, an example will be described in which processing starts from K1=1 out of K1=1 and 2.

[0114] After emptying C'(K1), the terminal 20 adds K1=1(i=0), K1=3(i=1), K1=5(i=2), K1=7(i=3), K1=9(i=4), and K1=11(i=5) to C'(K1) for the original K1=1. For the original K1=2, the terminal 20 adds K1=2(i=0), K1=4(i=1), K1=6(i=2), K1=8(i=3), K1=10(i=4), and K1=12(i=5) to C'(K1).

[0115] As a result, C'(K1)={1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,}, and the extended PDSCH slot window can be obtained as shown in FIG.

[0116] Figure 20 shows that C(K1) is {1,2} and μ DL -μ UL = 1. In this case, "K 1,k +ceil(i / (2 μ_DL-μ_UL ))" is "K 1,k +ceil(i / 2)".

[0117] Here, an example will be described in which processing starts from K1=1 out of K1=1 and 2.

[0118] After emptying C'(K1), terminal 20 adds K1=1(i=0), K1=2(i=1), K1=3(i=3), and K1=4(i=5) to C'(K1) for the original K1=1. For the original K1=2, terminal 20 adds K1=5(i=5) to C'(K1).

[0119] As a result, C'(K1)={1, 2, 3, 4, 5}, and the extended PDSCH slot window can be obtained as shown in FIG.

[0120] The value of M may be defined in the specifications, may be notified from the base station 10 to the terminal 20 by RRC signaling, or may be determined from the settings in the TDRA table.

[0121] <Example 2: Step A-1, Option 2-2> In option 2-2, the terminal 20 determines the extended PDSCH slot window based on a set of PDSCH slots in the TDRA table where PDSCH reception is possible (this is denoted as C(m)).

[0122] First, the terminal 20 assumes that the last TDRA in each TDRA row is in slot n, and adds m to C(m) if there is a row with at least one TDRA in slot nm (m≧0). If the TDRA table is as shown in Figure 21, TDRAs exist in slots n (m=0), n-1 (m=1), n-4 (m=4), and n-5 (m=5), so C(m)={0,1,4,5}. In the subsequent processing, there are the following options 2-2A and 2-2B.

[0123] <Option 2-2A> In option 2-1A, terminal 20 directly expands the PDSCH slot window.

[0124] That is, the terminal 20 first empties the extended PDSCH slot window and then empties each slot n in the original PDSCH slot window. D,k For each m i For PDSCH slots (n D,k -m i ) is added to the extended PDSCH slot window if it does not already have a value. Note that the original PDSCH slot window is the PDSCH slot window without extension, as shown in Figures 6 and 7.

[0125] A specific example of option 2-2A will be described with reference to Fig. 22. The TDRA table here is as shown in Fig. 21.

[0126] 22 shows an example in which the original PDSCH slot window is slot n+5 and slot n+6. Here, an example in which processing starts from slot n+6 out of slot n+5 and slot n+6 will be described.

[0127] After the terminal 20 empties the extended PDSCH slot window, for slot n+6, the terminal 20 i =0), slot n+5(m i =1), slot n+2(m i =4), slot n+1(m i = 5) is added to the extended PDSCH slot window. For slot n+5, add slot n+4 (m i =1), slot n(m i = 5) is added, resulting in an extended PDSCH slot window as shown in Figure 22.

[0128] <Option 2-2B> In option 2-1B, terminal 20 obtains extended K1 set C'(K1) by extending K1 set C(K1). Terminal 20 determines the extended PDSCH slot window based on the extended K1 set C'(K1) using the same procedure as the procedure for determining the PDSCH slot window in R16.

[0129] Specifically, the terminal 20 first empties the expanded K1 set C'(K1). Next, the terminal 20 empties each K 1,k For each m i About "K 1,k +ceil(m i / (2 μ_DL-μ_UL ))" to C'(K1) if that value is not already present in C'(K1).

[0130] In Option 2-2B, μ DL =μ UL A specific example of this case will be described with reference to Fig. 23. The TDRA table is as shown in Fig. 21, where C(m)={0, 1, 4, 5}.

[0131] 23 shows an example in which C(K1) is {1, 2}. Here, an example in which processing starts from K1=1 out of K1=1 and 2 will be described.

[0132] After emptying C'(K1), the terminal 20 changes K1=1(m i =0), K1=2(m i =1), K1=5(m i =4), K1=6(m i =5) is added to C'(K1). For the original K1=2, K1=3(m i =1), K1=7(m i =5).

[0133] As a result, C'(K1)={1, 2, 3, 5, 6, 7}, and the extended PDSCH slot window can be obtained as shown in FIG.

[0134] Figure 24 shows that C(K1) is {1,2} and μ UL -μ DL = 1. In this case, "K 1,k +ceil(m i / (2 μ_DL-μ_UL ))" is "K 1,k +ceil(2m i )".

[0135] Here, an example will be described in which processing starts from K1=1 out of K1=1 and 2.

[0136] After emptying C'(K1), the terminal 20 changes K1=1(m i =0), K1=3(m i =1), K1=9(m i =4), K1=11(m i =5) is added to C'(K1). For the original K1=2, K1=2(m i =0), K1=4(m i =1), K1=10(m i =4), K1=12(m i =5) to C´(K1).

[0137] As a result, C'(K1)={1, 2, 3, 9, 10, 11, 12,}, and the extended PDSCH slot window can be obtained as shown in FIG.

[0138] Figure 25 shows that C(K1) is {1,2} and μ DL -μ UL = 1. In this case, "K 1,k +ceil(m i / (2 μ_DL-μ_UL ))" is "K 1,k +ceil(m i / 2)".

[0139] Here, an example will be described in which processing starts from K1=1 out of K1=1 and 2.

[0140] After emptying C'(K1), the terminal 20 changes K1=1(m i =0), K1=2(m i =1), K1=3(m i =4), K1=4(m i =5) is added to C'(K1). For the original K1=2, K1=5(m i =5) to C´(K1).

[0141] As a result, C'(K1)={1, 2, 3, 4, 5}, and the extended PDSCH slot window can be obtained as shown in FIG.

[0142] The TDRA row set to be considered may be all rows included in the RRC-configured TDRA table (Opt1), or may be a TDRA row set (Opt2) obtained by excluding rows that conflict with the TDD UL configuration from the TDRA set of Opt1.

[0143] <Example 2: Step A-2> After determining the extended PDSCH slot window as described above, terminal 20 determines candidate occasions for each of the multiple PDSCH slots in the extended PDSCH slot window. That is, here, it is determined which SLIVs may be assigned to each slot. In other words, it determines one or more SLIVs that are candidates for assignment for each slot. There are two determination methods, Alt1 and Alt2, as follows:

[0144] <Example 2, Step A-2, Alt1> In Alt1, the terminal 20 uses all types of SLIVs in all rows of the TDRA table to determine candidate occasions in each slot of the multiple PDSCH slots.

[0145] For example, when the TDRA table is as shown in Fig. 16, all types of SLIVs in Fig. 16 are SLIVs #1 to #7, the same as in Fig. 11. Therefore, in this case, terminal 20 uses SLIVs #1 to #7 to determine candidate PDSCH reception occasions for each slot.

[0146] Terminal 20 uses the same method as the existing technology of R16 to select all or some of SLIVs #1 to #7 in each slot based on UL collision check and predetermined rules, and sets them as candidate PDSCH reception occasions.

[0147] <Example 1, Step A-2, Alt2> In Alt2, for each of the multiple PDSCH slots in the extended PDSCH slot window, the terminal 20 uses the SLIV types across all rows in the slot of the TDRA table corresponding to that slot to determine candidate occasions. Specifically, the SLIV (i.e., candidate occasions) for each slot are determined in the following procedure.

[0148] Each PDSCH slot n' in the extended PDSCH slot window D In contrast, the SLIV set is C n´_D It is represented as (SLIV) and is initially empty.

[0149] The terminal 20 receives the PDSCH signal for each PDSCH slot n in the original PDSCH slot window. D The following processing is performed on

[0150] In each TDRA row, the last slot is slot n D Assume that slot n' D Look at all TDRA rows in slot n' D If there is a TDRA row with a SLIV in slot n' D Of all the SLIVs present in n´_D (SLIV) n´_D Add to (SLIV).

[0151] An example in which the TDRA table is as shown in FIG. 16 will be described with reference to FIG. 26, which corresponds to FIG.

[0152] In FIG. 26, each PDSCH slot n in the original PDSCH slot window D are slot n+6 and slot n+5.

[0153] PDSCH slot n in the original PDSCH slot window D is slot n+6, slots n, n-1, n-2, n-3, n-4, and n-5 shown in the TDRA table shown in FIG. 16 correspond to slots n+6, n+5, n+4, n+3, n+2, and n+1 in FIG. 26, respectively. As shown in FIGS. 16 and 26, the SLIV sets (C n´_D (SLIV)) slot n+6={#1,#4,#7}, slot n+5={#1,#3,#6}, slot n+4={}, slot n+3={}, slot n+2={#1,#2}, slot n+1={#5}.

[0154] PDSCH slot n in the original PDSCH slot window D is slot n+5, slots n, n-1, n-2, n-3, n-4, and n-5 shown in the TDRA table shown in FIG. 16 correspond to slots n+5, n+4, n+3, n+2, n+1, and n in FIG. 26, respectively. As shown in FIGS. 16 and 26, the SLIV sets (C n´_D (SLIV)) slot n+5={#1,#4,#7}, slot n+4={#1,#3,#6}, slot n+3={}, slot n+2={}, slot n+1={#1,#2}, slot n={#5}.

[0155] Therefore, by combining the above, the set of SLIVs for each slot is: slot n+6={#1,#4,#7}, slot n+5={#1,#3,#4,#6,#7}, slot n+4={#1,#3,#6}, slot n+2={#1,#2}, slot n+1={#1,#2,#5}, slot n={#5}. These are the candidates for the final occasions to be determined for each slot.

[0156] The terminal 20 performs UL collision check using the same method as the existing technology of R16, and selects all or part of the set of SLIVs in each slot based on a predetermined rule to set them as candidate PDSCH reception occasions. Note that when Alt1 and Alt2 are compared, Alt2 has lower redundancy than Alt1.

[0157] As a variation other than the above example, the SLIV for each slot may be defined in advance in a specification or the like, and the base station 10 and the terminal 20 may determine candidate PDSCH reception occasions based on the SLIV defined in the specification.

[0158] (Other examples) An example applicable to both the first and second embodiments will be described below.

[0159] Which of the above-mentioned multiple Proposals / Options / Alts is used may be set by upper layer parameters transmitted from the base station 10 to the terminal 20, or may be notified from the terminal 20 to the base station 10 as terminal capability (UE Capability), may be defined by specifications, or may be set by upper layer parameters and notified by the terminal 20 as terminal capability (UE Capability).

[0160] Information indicating whether terminal 20 supports scheduling of multiple PDSCHs based on a single DCI may be defined as UE capability.

[0161] Furthermore, as the terminal capability (UE Capability), information indicating whether or not the terminal 20 supports joint HARQ-ACK feedback for multiple PDSCHs scheduled in a single DCI (a function of collectively notifying multiple HARQ-ACKs for multiple PDSCHs) may be defined.

[0162] Furthermore, as the UE capability, information indicating whether or not the UE supports determining candidate PDSCHoccasions based on each SLIV in each TDRA row may be defined.

[0163] Furthermore, as the UE capability, information indicating whether or not the UE supports determining an SLIV set (for determining candidate PDSCH occurrences) based on the span of a TDRA row in a certain PDSCH slot may be defined.

[0164] Furthermore, information indicating whether or not the extension of the PDSCH slot window is supported may be defined as the UE capability. Furthermore, information indicating whether or not the extension of the K1 set is supported may be defined as the UE capability.

[0165] Furthermore, information indicating whether or not mapping of multiple PDSCH slots associated with a corresponding DL slot to a K1 value may be defined as UE capability.

[0166] The terminal 20 may transmit one or more of the above-mentioned capability information to the base station 10. Furthermore, based on the capability information received from the terminal 20, the base station 10 may instruct the terminal 20 to operate in accordance with the capability.

[0167] The technique according to the present embodiment described above provides a technique that enables appropriate transmission of feedback information when scheduling a plurality of PDSCHs using one piece of control information.

[0168] (Device configuration) Next, an example of the functional configuration of the base station 10 and the terminal 20 that execute the processes and operations described above will be described.

[0169] <Base station 10> Fig. 27 is a diagram showing an example of the functional configuration of the base station 10. As shown in Fig. 27, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Fig. 27 is merely an example. The names of the functional divisions and functional units may be any as long as they can execute the operations related to the embodiment of the present invention. Furthermore, the transmitting unit 110 and the receiving unit 120 may be collectively referred to as a communication unit.

[0170] The transmitter 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The receiver 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signals. The transmitter 110 also has a function of transmitting, to the terminal 20, an NR-PSS, an NR-SSS, an NR-PBCH, a DL / UL control signal, DCI via a PDCCH, data via a PDSCH, and the like.

[0171] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in a storage device provided in the setting unit 130, and reads out the information from the storage device as needed.

[0172] The control unit 140 schedules DL reception or UL transmission of the terminal 20 via the transmission unit 110. The control unit 140 also includes a function for performing LBT. The functional unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the reception unit 120. The transmission unit 110 may also be called a transmitter, and the reception unit 120 may also be called a receiver.

[0173] <Terminal 20> Fig. 28 is a diagram showing an example of the functional configuration of the terminal 20. As shown in Fig. 28, the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Fig. 28 is merely an example. As long as the operations related to the embodiment of the present invention can be performed, the names of the functional divisions and functional units may be any. The transmitting unit 210 and the receiving unit 220 may be collectively referred to as a communication unit.

[0174] The transmitter 210 creates a transmission signal from transmission data and transmits the transmission signal wirelessly. The receiver 220 wirelessly receives various signals and acquires a higher layer signal from the received physical layer signal. The receiver 220 also has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, DCI via PDCCH, data via PDSCH, and the like transmitted from the base station 10. For example, the transmitter 210 may transmit a PSCCH (Physical Sidelink Control Channel), a PSSCH (Physical Sidelink Shared Channel), a PSDCH (Physical Sidelink Discovery Channel), a PSBCH (Physical Sidelink Broadcast Channel), and the like to another terminal 20 as D2D communication, and the receiver 120 may receive the PSCCH, PSSCH, PSDCH, PSBCH, and the like from the other terminal 20.

[0175] The setting unit 230 stores various setting information received by the receiving unit 220 from the base station 10 or other terminals in a storage device provided in the setting unit 230, and reads the information from the storage device as needed. The setting unit 230 also stores setting information that is set in advance. The control unit 240 controls the terminal 20. The control unit 240 also includes a function for performing LBT.

[0176] The terminal and base station of this embodiment may be configured as the terminal and base station shown in the following items. Also, the following feedback method may be implemented.

[0177] <Configuration of Example 1> (Section 1) a control unit that determines a plurality of DL slots that may be scheduled by one piece of control information received from a base station based on time domain resource allocation configuration information and a parameter value indicating a transmission timing of feedback information, and determines candidate receiving opportunities for the plurality of DL slots; a transmitter for transmitting feedback information for the candidate reception opportunities in the plurality of DL slots to the base station; A terminal comprising: (Section 2) The control unit assumes that the last slot in the time domain resource allocation configuration information is the DL slot corresponding to the parameter value, and determines the DL slots based on a plurality of slots with resource allocation in the time domain resource allocation configuration information. 1. The terminal described in paragraph 1. (Section 3) The control unit determines candidate receiving opportunities for each DL slot in the plurality of DL slots based on all types of allocation information in the time domain resource allocation configuration information. 2. A terminal according to claim 1 or 2. (Section 4) The control unit determines a candidate receiving opportunity for each DL slot in the plurality of DL slots based on slot allocation information corresponding to the DL slot in the time domain resource allocation configuration information. 2. A terminal according to claim 1 or 2. (Section 5) a transmitter that transmits one control information for scheduling a plurality of DL slots to a terminal; a receiving unit that receives, from the terminal, feedback information for candidate reception opportunities in a plurality of DL slots determined based on time domain resource allocation configuration information and parameter values ​​indicating transmission timings of the feedback information; A base station comprising: (Section 6) determining a plurality of DL slots that may be scheduled by one control information received from a base station based on time domain resource allocation configuration information and a parameter value indicating a transmission timing of feedback information, and determining candidate receiving opportunities for the plurality of DL slots; transmitting feedback information for the candidate reception opportunities in the plurality of DL slots to the base station; A feedback method performed by a terminal, comprising:

[0178] Any of the above configurations provides a technique that enables appropriate transmission of feedback information when scheduling multiple PDSCHs using one control information. According to the second term, multiple DL slots can be determined based on a TDRA table, for example. According to the third term, allocation information used to determine candidate reception opportunities in each DL slot can be easily determined. According to the fourth term, redundancy can be reduced more than in the third term.

[0179] <Configuration of Example 2> (Section 1) a control unit that determines a plurality of DL slots that may be scheduled by one piece of control information received from a base station by extending a DL slot corresponding to a parameter value indicating a transmission timing of feedback information, and determines candidate receiving opportunities in the plurality of DL slots; a transmitter for transmitting feedback information for the candidate reception opportunities in the plurality of DL slots to the base station; A terminal comprising: (Section 2) The control unit extends the DL slot by extending the set of parameter values. 1. The terminal described in paragraph 1. (Section 3) The control unit determines candidate receiving opportunities for each DL slot in the plurality of DL slots based on all types of allocation information in the time domain resource allocation configuration information. 2. A terminal according to claim 1 or 2. (Section 4) The control unit determines a candidate receiving opportunity for each DL slot in the plurality of DL slots based on slot allocation information corresponding to the DL slot in time domain resource allocation configuration information. 2. A terminal according to claim 1 or 2. (Section 5) a transmitter that transmits one control information for scheduling a plurality of DL slots to a terminal; a receiving unit that receives, from the terminal, feedback information for candidate reception opportunities in a plurality of DL slots determined by extending DL slots corresponding to a parameter value indicating a transmission timing of the feedback information; A base station comprising: (Section 6) determining a plurality of DL slots that may be scheduled by one control information received from a base station by extending a DL slot corresponding to a parameter value indicating a transmission timing of feedback information, and determining candidate receiving opportunities in the plurality of DL slots; transmitting feedback information for the candidate reception opportunities in the plurality of DL slots to the base station; A feedback method performed by a terminal, comprising:

[0180] Any of the above configurations provides a technique that enables appropriate transmission of feedback information when scheduling multiple PDSCHs using one control information. According to the second term, for example, DL slots can be expanded by expanding the K1 set. According to the third term, allocation information used to determine candidate reception opportunities in each DL slot can be easily determined. According to the fourth term, redundancy can be reduced more than in the third term.

[0181] (Hardware configuration) The block diagrams (FIGS. 27 and 28) used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining the single device or the multiple devices with software.

[0182] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocation, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0183] For example, the base station 10, the terminal 20, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 29 is a diagram illustrating an example of the hardware configuration of the base station 10 and the terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 described above may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0184] In the following description, the term "apparatus" can be read as a circuit, a device, a unit, etc. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0185] Each function in the base station 10 and the terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001, the memory device 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls at least one of reading and writing data in the memory device 1002 and the auxiliary memory device 1003.

[0186] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 140, control unit 240, etc. may be realized by the processor 1001.

[0187] Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes in accordance with the programs. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 140 of the base station 10 shown in FIG. 27 may be implemented by a control program stored in the storage device 1002 and executed by the processor 1001. Furthermore, for example, the control unit 240 of the terminal 20 shown in FIG. 28 may be implemented by a control program stored in the storage device 1002 and executed by the processor 1001. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line.

[0188] The storage device 1002 is a computer-readable recording medium and may be configured, for example, by at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The storage device 1002 may also be called a register, a cache, a main memory, etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.

[0189] The secondary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. The above-mentioned storage medium may be, for example, a database, a server, or other suitable medium including at least one of the storage device 1002 and the secondary storage device 1003.

[0190] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, a transmission / reception antenna, an amplifier unit, a transmission / reception unit, a transmission path interface, etc. may be realized by the communication device 1004. The transmission / reception unit may be implemented as a transmission unit and a reception unit that are physically or logically separated.

[0191] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0192] Furthermore, each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0193] Furthermore, base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

[0194] (Supplementary explanation of the embodiment) Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; two or more items may be combined as needed, and items described in one item may apply to items described in another item (unless inconsistent). The boundaries between functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of the processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 have been described using functional block diagrams. However, such devices may be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

[0195] Furthermore, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0196] Each aspect / embodiment described in the present disclosure may be applied to at least one of systems using LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (New Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark), IEEE 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), or other appropriate systems, and next-generation systems extended based on these. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G, etc.) may also be applied.

[0197] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described herein may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order and are not limited to the particular order presented.

[0198] In this specification, a specific operation that is described as being performed by the base station 10 may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having the base station 10, it is clear that various operations performed for communication with the terminal 20 may be performed by at least one of the base station 10 and another network node other than the base station 10 (such as, but not limited to, an MME or an S-GW). Although the above example illustrates a case where there is one other network node other than the base station 10, the other network node may be a combination of multiple other network nodes (such as an MME and an S-GW).

[0199] The information or signals described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input / output via multiple network nodes.

[0200] Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

[0201] In the present disclosure, the determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0202] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0203] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0204] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0205] Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0206] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0207] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by an index.

[0208] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0209] In this disclosure, terms such as "base station (BS)," "radio base station," "base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0210] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0211] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0212] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0213] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile body, or the mobile body itself. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may also include devices that do 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] Furthermore, a base station in the present disclosure may be read as a terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between a plurality of terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0215] Similarly, the term "terminal" in the present disclosure may be read as "base station." In this case, the base station may be configured to have the functions of the terminal described above.

[0216] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0217] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0218] The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.

[0219] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0220] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0221] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0222] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0223] A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0224] Numerology may be communication parameters that apply to at least one of transmission and reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0225] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may be a time unit based on numerology.

[0226] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0227] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0228] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, or the like instead of a subframe. Furthermore, one slot may be called a unit time. The unit time may differ for each cell depending on the numerology.

[0229] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units. Note that the definition of TTI is not limited to this.

[0230] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0231] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

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

[0233] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

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

[0235] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0236] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0237] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0238] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

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

[0240] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0241] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0242] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0243] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0244] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0245] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure. [Explanation of symbols]

[0246] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 terminals 210 Transmitter 220 Receiving unit 230 Setting Section 240 Control Unit 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication equipment 1005 Input Device 1006 Output Device

Claims

1. When a set of TDRAs indicating time domain resource allocation includes one or more TDRAs that include values ​​indicating the start position and length of resources for data transmission, a control unit generates a new set by adding a new parameter value to a set of parameter values ​​indicating the timing of transmitting feedback information, and determines multiple candidate reception opportunities corresponding to the new set; a transmitter configured to transmit feedback information corresponding to the plurality of candidate reception opportunities to a base station, When the number of the DL slot in the set of DL slots in the one TDRA is m i , the numerology of the downlink is μ_DL, and the numerology of the uplink is μ_UL, the control unit sets the value obtained by adding ceil(m i / (2 μ_DL-μ_UL)) to the parameter value indicating the transmission timing of the feedback information as the new parameter value. Terminal.

2. When a set of TDRAs indicating time domain resource allocations includes one or more TDRAs containing values ​​indicating the start position and length of resources for data transmission, the terminal creates a new set by adding a new parameter value to the set of parameter values ​​indicating the timing of transmitting feedback information, and determines multiple candidate reception opportunities corresponding to the new set; a base station comprising a receiver configured to receive feedback information corresponding to the plurality of candidate reception opportunities from the terminal, When the number of the DL slot in the set of DL slots in the one TDRA is m i , the downlink numerology is μ_DL, and the uplink numerology is μ_UL, the terminal adds ceil(m i / (2 μ_DL-μ_UL)) to the parameter value indicating the transmission timing of the feedback information and sets the value as the new parameter value. Base station.

3. When a set of TDRAs indicating time domain resource allocation includes one or more TDRAs containing values ​​indicating the start position and length of resources for transmitting data, a control step of generating a new set by adding a new parameter value to a set of parameter values ​​indicating the timing of transmitting feedback information, and determining multiple candidate reception opportunities corresponding to the new set; transmitting feedback information corresponding to the plurality of candidate reception opportunities to a base station; A terminal-implemented feedback method comprising: In the control step, when the DL slot number in the set of DL slots in the one TDRA is m i , the downlink numerology is μ_DL, and the uplink numerology is μ_UL, the terminal sets the new parameter value to a value obtained by adding ceil(m i / (2 μ_DL-μ_UL) to the parameter value indicating the transmission timing of feedback information. How to give feedback.

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