Terminal, base station device, and feedback method

Abstract

A terminal equipped with a receiving unit for receiving one piece of control information for scheduling PDSCH receipt in a plurality of CCs from a base station device, and a control unit for obtaining one feedback timing index value from the control information and determining the feedback timing for each CC among the plurality of CCs by using said feedback timing index value and a parameter.

Description

[Technical field]

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

[0002] In the 3GPP (3rd Generation Partnership Project), a wireless communication method called 5G or NR (New Radio) (hereinafter, the wireless communication method is referred to as "NR") is being studied in order to realize a larger system capacity, a higher data transmission speed, a lower latency in wireless sections, etc. In 5G, various wireless technologies and network architectures are being studied in order to meet the requirement of achieving a throughput of 10 Gbps or more while keeping the latency in wireless sections to 1 ms or less (for example, Non-Patent Document 1).

[0003] Dynamic spectrum sharing (DSS), a technology that allows LTE and NR to coexist in the same band, is also being considered. By allowing different RATs (Radio Access Technologies) to coexist on a single carrier, it will be possible to flexibly respond to traffic demands during the system generation transition period. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 38.300 V15.9.0 (2020-03) [Non-Patent Document 2] 3GPP TS 38.331 V15.9.0 (2020-03) [Non-Patent Document 3] 3GPP TS 38.213 V15.9.0 (2020-03) Summary of the Invention [Problem to be solved by the invention]

[0005] In the current DSS specifications, resources for transmitting and receiving control signals are set for each LTE terminal and NR terminal. Since the resources on which control signals can be allocated are specified in advance and the systems coexist on a single carrier, it is expected that there will be a shortage of resources for transmitting and receiving control signals compared to when the systems are operated independently on separate carriers.

[0006] Therefore, in DSS, in order to use resources efficiently, scheduling of PDSCH reception in multiple CCs (multiple cells) using one DCI is being considered.

[0007] However, when scheduling PDSCH reception in multiple CCs with one DCI, the timing of transmitting HARQ information (ACK / NACK) for PDSCH reception in a terminal may differ between CCs. If the timing of transmitting HARQ information differs between CCs, PUCCH resource usage becomes inefficient. Note that this problem is not limited to the case of using DSS, but is a problem that arises when scheduling PDSCH reception in multiple CCs with one DCI.

[0008] The present invention has been made in consideration of the above points, and aims to provide a technology that enables a terminal to transmit HARQ information for PDSCH reception at the same timing between CCs when scheduling PDSCH reception in multiple CCs with one DCI. [Means for solving the problem]

[0009] According to the disclosed technology, a receiving unit that receives one piece of control information for scheduling PDSCH reception in multiple CCs from a base station device; A feedback timing index value is obtained from the control information, and the feedback timing index value is , set by the base station device and a control unit that determines a feedback timing for each of the plurality of CCs using the parameters. A terminal comprising: The control unit determines feedback timing for another CC by using the feedback timing for the CC obtained from the feedback timing index value and the parameter. A terminal is provided. Effect of the Invention

[0010] According to the disclosed technology, a technology is provided that enables a terminal to transmit HARQ information for PDSCH reception at the same timing between CCs when scheduling PDSCH reception in multiple CCs using one DCI. [Brief description of the drawings]

[0011] [Figure 1] 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Diagram 2] 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Diagram 3] 1 is a diagram for explaining a basic operation of a wireless communication system according to an embodiment of the present invention. [Figure 4] FIG. 13 is a diagram illustrating an example of Single DCI scheduling. [Diagram 5] FIG. 13 is a diagram for explaining the transmission timing of HARQ information. [Figure 6] FIG. 1 is a diagram for explaining a problem. [Figure 7] FIG. 11 is a diagram for explaining an example of the operation of a terminal; [Figure 8] FIG. 13 is a diagram illustrating an example of a table. [Figure 9] FIG. 13 is a diagram illustrating an example of a table. [Figure 10] FIG. 13 is a diagram illustrating an example of a table. [Figure 11] FIG. 11 is a diagram for explaining an example of the operation of a terminal; [Figure 12] FIG. 11 is a diagram for explaining an example of the operation of a terminal; [Figure 13] FIG. 11 is a diagram for explaining an example of the operation of a terminal; [Figure 14] FIG. 11 is a diagram for explaining an example of the operation of a terminal; [Figure 15] FIG. 11 is a diagram for explaining an example of the operation of a terminal; [Figure 16] 2 is a diagram illustrating an example of a functional configuration of a base station device 10 according to an embodiment of the present invention. [Figure 17] 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to an embodiment of the present invention. [Figure 18] 2 is a diagram illustrating an example of a hardware configuration of a base station device 10 or a terminal 20 according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] 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.

[0013] In the operation of the wireless communication system according to the embodiment of the present invention, an existing technology may be used as appropriate. The existing technology may be, for example, the existing NR or LTE, but is not limited to the existing NR or LTE.

[0014] (System Configuration) Fig. 1 is a diagram for explaining a wireless communication system in an embodiment of the present invention. As shown in Fig. 1, the wireless communication system in the embodiment of the present invention includes a base station device 10 and a terminal 20. Although Fig. 1 shows one base station device 10 and one terminal 20, this is an example, and there may be a plurality of each.

[0015] The base station device 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a wireless signal are defined in the time domain and the frequency domain, and the time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. In addition, a TTI (Transmission Time Interval) in the time domain may be a slot, or the TTI may be a subframe.

[0016] The base station apparatus 10 is capable of performing carrier aggregation in which a plurality of cells (a plurality of CCs (component carriers)) are aggregated to communicate with the terminal 20. In the carrier aggregation, one PCell (primary cell) and one or more SCells (secondary cells) are used.

[0017] The base station device 10 transmits a synchronization signal, system information, and the like to the terminal 20. The synchronization signal is, for example, NR-PSS and NR-SSS. The system information is, for example, transmitted by NR-PBCH or PDSCH, and is also called broadcast information. As shown in FIG. 1, the base station device 10 transmits a control signal or data to the terminal 20 in DL (Downlink), and receives a control signal or data from the terminal 20 in UL (Uplink). Note that, here, what is transmitted by a control channel such as PUCCH or PDCCH is called a control signal, and what is transmitted by a shared channel such as PUSCH or PDSCH is called data, but these names are merely examples.

[0018] The terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, a communication module for M2M (Machine-to-Machine), etc. As shown in Fig. 1, the terminal 20 receives a control signal or data from the base station device 10 in DL and transmits a control signal or data to the base station device 10 in UL, thereby using various communication services provided by the wireless communication system. The terminal 20 may be called a UE, and the base station device 10 may be called a gNB.

[0019] The terminal 20 is capable of performing carrier aggregation, which aggregates multiple cells (multiple CCs (component carriers)) to communicate with the base station apparatus 10. In the 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.

[0020] Fig. 2 shows a configuration example of a wireless communication system in which DC (Dual connectivity) is implemented. As shown in Fig. 2, a base station device 10A serving as an MN (Master Node) and a base station device 10B serving as an SN (Secondary Node) are provided. The base station device 10A and the base station device 10B are each connected to a core network. The terminal 20 can communicate with both the base station device 10A and the base station device 10B.

[0021] A cell group provided by the base station device 10A, which is an MN, is called an MCG (Master Cell Group), and a cell group provided by the base station device 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. In this specification, a CC and a cell may be used synonymously. In other words, a CC in this specification and the claims may be replaced with a cell.

[0022] The processing operation in this embodiment may be executed in the system configuration shown in Fig. 1, may be executed in the system configuration shown in Fig. 2, or may be executed in a system configuration other than these. When DC is executed, multiple CCs to be scheduled by one DCI may be multiple CCs in the same cell group, or multiple CCs across multiple cell groups.

[0023] (Basic operation example) An example of a basic operation of the communication system in the embodiment of the present invention will be described with reference to Fig. 3. This operation is common to Examples 1 to 5 described later.

[0024] In S101, the base station device 10 transmits setting information to the terminal 20 by an RRC message, and the terminal 20 receives the setting information. This setting information includes setting information related to the timing from PDSCH reception to HARQ information (DL ACK) transmission, such as dl-DataToUL-ACK (Non-Patent Document 2). In addition, setting information such as parameters described in each embodiment below may be included.

[0025] In S102, the base station apparatus 10 transmits DCI (control information) by the PDCCH, and the terminal 20 receives the DCI. This DCI is DCI that schedules reception of data by the PDSCH of multiple CCs. Note that receiving data by the PDSCH (channel) may be expressed as receiving the PDSCH.

[0026] In S103, terminal 20 receives data from base station apparatus 10 via PDSCH in each of the multiple CCs in accordance with the DCI received in S102.

[0027] In S104, terminal 20 transmits HARQ information (which may be referred to as HARQ feedback) for PDSCH reception of each CC at a timing determined from the value of the PDSCH-to-HARQ_feedback timing indicator field included in the DCI.

[0028] As described above, in this embodiment, base station apparatus 10 schedules terminal 20 to receive PDSCHs of multiple CCs (multiple cells) using one DCI (single DCI).

[0029] An example of scheduling of PDSCH reception for multiple CCs by a single DCI is shown in Fig. 4. In the example of Fig. 4(a), terminal 20 receives DCI by a PDCCH in CC #x, and receives PDSCH in each of CC #x and CC #y according to the scheduling information (time and frequency allocation information, etc.) of that DCI.

[0030] In the example of FIG. 4(b), terminal 20 receives DCI via a PDCCH in CC#x, and receives PDSCHs in both CC#y and CC#z in accordance with the scheduling information (time and frequency allocation information, etc.) of that DCI.

[0031] The number of multiple CCs (multiple cells) for which PDSCH reception is scheduled by single DCI is not particularly limited, but is, for example, 2. In the embodiment described below, 2 is used. However, 2 is merely an example. The number of multiple CCs for which PDSCH reception is scheduled by single DCI may be 3 or more.

[0032] For example, the single DCI may include scheduling information (such as time and frequency allocation information) for each of multiple CCs that schedule PDSCH reception, or may include one scheduling information for multiple CCs that schedule PDSCH reception. When one scheduling information is included, for example, terminal 20 converts the one scheduling information into multiple scheduling information according to a predetermined rule (e.g., a calculation formula using a cell index), and applies the converted information to the multiple CCs.

[0033] (Problem and Overview of the Present Embodiment) In the conventional techniques described in Non-Patent Document 2 and Non-Patent Document 3, the timing at which terminal 20 returns HARQ information in response to PDSCH reception to base station apparatus 10 (HARQ feedback timing) is k [slots] after the slot at which terminal 20 received PDSCH. More specifically, as shown in Fig. 5, if PDSCH reception ends in slot n, HARQ information is transmitted in slot n+k. Such timing may be expressed as transmitting HARQ information k slots after receiving PDSCH.

[0034] Regarding the value of k, a list of up to eight values ​​of k is notified from the base station device 10 to the terminal 20 by dl-DataToUL-ACK described in Non-Patent Document 2.

[0035] Based on Table 9.2.3-1 described in Non-Patent Document 3, terminal 20 obtains from dl-DataToUL-ACK the value of k corresponding to the value of the PDSCH-to-HARQ_feedback timing indicator field (this value may be referred to as the "PDSCH-to-HARQ_feedback timing indicator") included in the DCI received from base station apparatus 10, and transmits HARQ information at the timing of slot n+k as shown in FIG. 5.

[0036] Regarding HARQ feedback timing when scheduling PDSCH reception of multiple CCs with a single DCI, it is assumed that the same techniques as those described in Non-Patent Document 2 and Non-Patent Document 3 will be used.

[0037] For example, when scheduling PDSCH reception of CC#x and CC#y using a single DCI, terminal 20 may apply k specified in the PDSCH-to-HARQ_feedback timing indicator in the single DCI to the HARQ feedback timing for PDSCH reception in CC#x and the HARQ feedback timing for PDSCH reception in CC#y.

[0038] However, if the SCS (Subcarrier Spacing) of CC#x and CC#y is different, the length of one slot (called the slot length) will be different between CC#x and CC#y, and the k slots will not have the same time length.

[0039] Therefore, for example, the timing of returning HARQ information in PUCCH differs between CC#x and CC#y as shown in Fig. 6. When the timing of returning HARQ information differs between CC#x and CC#y, terminal 20 must return the HARQ information in two separate times, resulting in inefficient use of PUCCH resources.

[0040] Therefore, in this embodiment, as shown in FIG. 7, when scheduling PDSCH reception of multiple CCs using a single DCI, terminal 20 is capable of transmitting HARQ information for PDSCH reception of each CC at the same timing (i.e., in the same slot) across multiple CCs.

[0041] When terminal 20 transmits HARQ information at the same timing on multiple CCs, it means, for example, transmitting HARQ information for PDSCH reception on CC#x and HARQ information for PDSCH reception on CC#y together (e.g., in a continuous bit string) on ​​the PUCCH of CC#x (or the PUCCH of CC#y).

[0042] In the example of Fig. 7, the SCS of CC#x is 15 kHz, and the SCS of CC#y is 30 kHz. Therefore, the slot length in CC#y is 1 / 2 of the slot length in CC#x. Therefore, as shown in Fig. 7, when the timing of returning HARQ information is the same in CC#x and CC#y, there is a relationship of k1 = k2 × 2 between the slot length k2 from PDSCH reception to HARQ information transmission in CC#y and the slot length k1 from PDSCH reception to HARQ information transmission in CC#x.

[0043] In the case of scheduling PDSCH reception of multiple CCs in a single DCI, a technique that enables terminal 20 to transmit HARQ information for PDSCH reception of each CC at the same timing (i.e., in the same slot) between multiple CCs will be described using Examples 1 to 5. Any two or more of Examples 1 to 5 can be implemented in any combination.

[0044] In the description of the first to fifth embodiments, the step numbers in the basic operation example shown in Fig. 3 will be referred to as appropriate. Also, Fig. 7 showing that HARQ information is transmitted at the same timing between multiple CCs will be referred to as appropriate.

[0045] Example 1 In the first embodiment, in S102 of Fig. 3, the base station apparatus 10 transmits, for each CC, a HARQ feedback timing indicator for PDSCH reception included in DCI for scheduling PDSCH reception of multiple CCs to the terminal 20. Note that, hereinafter, for convenience, the "HARQ feedback timing indicator" may be written as "indicator".

[0046] For example, indicator A and indicator B are included in a single DCI that schedules PDSCH reception of two CCs.

[0047] In the first embodiment, the terminal 20 that receives the single DCI that schedules the PDSCH reception of multiple CCs assumes that the received single DCI indicates HARQ feedback timing for each of the PDSCH receptions of multiple CCs. That is, the terminal 20 decodes the single DCI on the assumption that the single DCI includes an indicator for each of the multiple CCs to be scheduled.

[0048] For example, if indicator A is stored in field A and indicator B is stored in field B in a single DCI, terminal 20 reads indicator A from the bit position of field A and reads indicator B from the bit position of field B.

[0049] Note that A, B, etc., that identify an indicator may be called an indicator index. For example, in a single DCI in which bits are arranged in order, field A that stores indicator A is at a bit position before field B that stores indicator B. In this way, the indicator index may correspond to the order of bit positions in a single DCI, or may correspond to something else.

[0050] Terminal 20 holds, for example, information of the table shown in FIG. 8 (a table obtained by modifying Table 9.2.3-1 described in Non-Patent Document 3), and by referring to the information in the table, obtains the value of k corresponding to indicator A from dl-DataToUL-ACK, and obtains the value of k corresponding to indicator B from dl-DataToUL-ACK.

[0051] Here, for example, assume that the single DCI received by terminal 20 is DCI that schedules PDSCH reception of CC#x and PDSCH reception of CC#y, as shown in FIG. 7, and that the HARQ feedback timing indicator for PDSCH reception of CC#x is indicator A, and the HARQ feedback timing indicator for PDSCH reception of CC#y is indicator B.

[0052] In this case, in the example of Fig. 7, the terminal 20 acquires k1 by indicator A and acquires k2 by indicator B. In the first embodiment, the base station device 10 sets indicator A and indicator B to single DCI so that HARQ information transmission is performed at the same timing by k1 and k2. Therefore, the terminal 20 can transmit HARQ information for PDSCH reception of CC#x and HARQ information for PDSCH reception of CC#y at the same timing as shown in Fig. 7. The base station device 10 receives the HARQ information transmitted from the terminal 10.

[0053] In the first embodiment, HARQ feedback timing (maximum 8 candidates) with the same granularity as Rel-15 / 16 can be indicated for each of multiple CCs.

[0054] The terminal 20 can determine the association between each indicator included in the single DCI and each CC targeted for scheduling by the single DCI, for example, by the method described in the following examples 1-1 to 1-4. Examples 1-1 to 1-4 can be implemented in any combination.

[0055] <Example 1-1> Information indicating the correspondence between each indicator included in the single DCI and each CC targeted for scheduling by the single DCI is set from the base station device 10 to the terminal 20 by RRC signaling (or MAC signaling). For example, information such as {indicator A, indicator B, indicator C}={CC#x, CC#y, CC#z} is set from the base station device 10 to the terminal 20. "CC#x" or the like may be an index of the CC or an index of the cell having that CC. In this case, for example, the terminal 20 determines that the indicator A read from the field A storing the indicator A corresponds to CC#x.

[0056] In addition, multiple pieces of association information may be configured by base station device 10 to terminal 20 by RRC signaling (or MAC signaling), and then one piece of association information may be activated from base station device 10 to terminal 20 by MAC signaling (or RRC signaling, or DCI).

[0057] In addition, information indicating the correspondence between each indicator included in a single DCI and each CC for which the single DCI is scheduled may be specified in a specification (standard), and the base station device 10 and terminal 20 may determine the correspondence between each indicator included in a single DCI and each CC for which the single DCI is scheduled in accordance with the description in the specification.

[0058] <Example 1-2> The terminal 20 (and the base station apparatus 10) determines that the indicator index and the CC index (which may be the cell index) correspond to each other in ascending order (or descending order).

[0059] For example, assume that indicator A and indicator B are notified by a single DCI, and the indices of the CCs to be scheduled are #0 and #3.

[0060] In this case, if the indicator index and the CC index correspond in ascending order, terminal 20 (and base station device 10) determines that indicator A corresponds to CC index #0 and indicator B corresponds to CC index #3. If the indicator index and the CC index correspond in descending order, terminal 20 (and base station device 10) determines that indicator B corresponds to CC index #0 and indicator A corresponds to CC index #3.

[0061] <Example 1-3> The terminal 20 (and the base station apparatus 10) determines that the indicator index and the SCS of the CC correspond in ascending order (or descending order).

[0062] For example, assume that indicator A and indicator B are notified by a single DCI, and the SCSs of the two CCs to be scheduled are 15 kHz and 30 kHz.

[0063] In this case, if the indicator index and the SCS of the CC correspond in ascending order, terminal 20 (and base station device 10) determines that indicator A corresponds to CC (SCS = 15 kHz) and indicator B corresponds to CC (SCS = 30 kHz). If the indicator index and the SCS of the CC correspond in descending order, terminal 20 (and base station device 10) determines that indicator A corresponds to CC (SCS = 30 kHz) and indicator B corresponds to CC (SCS = 15 kHz).

[0064] <Example 1-4> The terminal 20 (and the base station apparatus 10) determines that the indicator index is associated with "PCell, PSCell, PUCCH-SCell" and a cell other than "PCell, PSCell, PUCCH-SCell".

[0065] For example, an earlier (smaller) indicator index corresponds to the CC of "PCell, PSCell, PUCCH-SCell", and a later (larger) indicator index corresponds to the CC of a cell other than "PCell, PSCell, PUCCH-SCell".

[0066] In this case, for example, indicator A and indicator B are notified by a single DCI, and one of the two CCs to be scheduled is a PCell (or a PSCell or a PUCCH-SCell), and the other CC is a CC of a cell other than "PCell, PSCell, PUCCH-SCell."

[0067] In this case, terminal 20 (and base station apparatus 10) determines that indicator A corresponds to a CC of a PCell (or a PSCell or a PUCCH-SCell), and that indicator B corresponds to a CC of a cell other than "PCell, PSCell, PUCCH-SCell".

[0068] Note that the correspondence between the indicator indexes "PCell, PSCell, PUCCH-SCell" and cells other than "PCell, PSCell, PUCCH-SCell" is just an example. Correspondence may be performed based on a cell type other than the cell type perspective of "PCell, PSCell, PUCCH-SCell" (cells having PUCCH).

[0069] Example 2 In the second embodiment, it is assumed that the single DCI for scheduling PDSCH reception of multiple CCs is included in the single DCI when the terminal 20 receives the single DCI from the base station device 10. That is, in the second embodiment, the base station device 10 transmits to the terminal 20 the single DCI for scheduling PDSCH reception of multiple CCs, including one indicator.

[0070] Based on one indicator read from the received single DCI, terminal 20 determines each HARQ feedback timing (i.e., the value of k) for PDSCH reception of multiple CCs scheduled by the single DCI. There are variations in the method of determining k, which will be described in Examples 2A and 2B.

[0071] Example 2A In embodiment 2A, as an example, terminal 20 holds information of the table shown in Fig. 9 (a table obtained by modifying Table 9.2.3-1 described in Non-Patent Document 3). This table corresponds to the case where the bit size of the indicator is a maximum of 3. This table is also an example where the number of multiple CCs to be scheduled by a single DCI is 2. One CC is represented as CC#x, and the other CC is represented as CC#y.

[0072] For example, when the indicator is 3 bits, '000' indicates that the k value for CC#x is the first value in the dl-DataToUL-ACK, and the k value for CC#y is the first value in the dl-DataToUL-ACK. The other indicator values ​​are as shown in the table in FIG.

[0073] As an example, it is assumed that PDSCH reception of CC#0 and CC#3 is scheduled for terminal 20 by single DCI, CC#0 corresponds to CC#x in the table of FIG. 9, and CC#3 corresponds to CC#y in the table of FIG.

[0074] In this case, terminal 20 that receives the single DCI reads one indicator from the single DCI, and by referring to the table in Figure 9, determines k1 for PDSCH reception in CC#x (CC#0) and k2 for PDSCH reception in CC#y (CC#3) that correspond to the indicator.

[0075] In the second embodiment, the base station device 10 sets the indicator to single DCI so that the HARQ information is transmitted at the same timing by k1 and k2. Therefore, the terminal 20 can transmit HARQ information for PDSCH reception of CC#x and HARQ information for PDSCH reception of CC#y at the same timing as shown in Fig. 7. The base station device 10 receives the HARQ information transmitted from the terminal 20.

[0076] The bit size (X [bit]) of the indictor included in the single DCI may be set from the base station device 10 to the terminal 20 by RRC signaling or MAC signaling. When such a setting is performed, X may be a value greater than 3. Alternatively, the terminal 20 may determine X based on the size (number of entries, how many values ​​there are) of the dl-DataToUL-ACK received from the base station device 10 by RRC signaling. For example, if there are 16 values ​​in the dl-DataToUL-ACK, the terminal 20 determines X to be 4.

[0077] When the bit size of the indicator is a maximum of 4, as an example, terminal 20 holds information of the table shown in Fig. 10 (a table obtained by modifying Table 9.2.3-1 described in Non-Patent Document 3). This table is an example of a case where the number of CCs to be scheduled by a single DCI is 2. One CC is represented as CC#x, and the other CC is represented as CC#y.

[0078] For example, when the indicator is 4 bits, '0000' indicates that the k value for CC#x is the first value in the dl-DataToUL-ACK, and the k value for CC#y is the first value in the dl-DataToUL-ACK. The other indicator values ​​are as shown in the table in FIG.

[0079] As an example, it is assumed that PDSCH reception of CC#0 and CC#3 is scheduled for terminal 20 by single DCI, CC#0 corresponds to CC#x in the table of FIG. 10, and CC#3 corresponds to CC#y in the table of FIG.

[0080] In this case, terminal 20 that receives the single DCI reads one indicator from the single DCI, and by referring to the table in Figure 10, determines k1 for PDSCH reception in CC#x (CC#0) and k2 for PDSCH reception in CC#y (CC#3) that correspond to the indicator.

[0081] In the second embodiment, the base station device 10 sets the indicator to single DCI so that the HARQ information is transmitted at the same timing by k1 and k2. Therefore, the terminal 20 can transmit HARQ information for PDSCH reception of CC#x and HARQ information for PDSCH reception of CC#y at the same timing as shown in FIG.

[0082] <Example 2B> In the embodiment 2B, an indicator (bit string) included in a single DCI is divided at a certain bit position, and the divided information corresponds to each CC that is a scheduling target of the single DCI.

[0083] For example, assume that the number of multiple CCs to be scheduled for a single DCI is two, one of which is CC#x and the other is CC#y. As an example, terminal 20 determines that the most significant Y bits of an indicator read from a single DCI received from base station apparatus 10 are an indicator of HARQ feedback timing for PDSCH reception in CC#x (or the value of k), and determines that the remaining bits (bits excluding the most significant Y bits from the indicator read from single DCI) are an indicator of HARQ feedback timing for PDSCH reception in CC#y (or the value of k).

[0084] In this case, the base station device 10 sets the most significant Y bits of the indicator included in the single DCI as an indicator (or the value of k) of HARQ feedback timing for PDSCH reception in CC#x, and sets the remaining bits as an indicator (or the value of k) of HARQ feedback timing for PDSCH reception in CC#y.

[0085] In addition, terminal 20 may determine that the lowest Y bits of the indicator read from the single DCI received from base station device 10 are an indicator of HARQ feedback timing (or the value of k) for PDSCH reception in CC#x, and may determine that the remaining bits (bits excluding the lowest Y bits from the indicator read from the single DCI) are an indicator of HARQ feedback timing (or the value of k) for PDSCH reception in CC#y.

[0086] In this case, the base station device 10 sets the lowest Y bits of the indicator included in the single DCI as an indicator of HARQ feedback timing (or the value of k) for PDSCH reception in CC#x, and sets the remaining bits as an indicator of HARQ feedback timing (or the value of k) for PDSCH reception in CC#y.

[0087] The value of Y above may be set (or activated) from the base station device 10 to the terminal 20 by RRC signaling or MAC signaling, or may be predetermined in a specification or the like and the value may be held by the terminal 20 (and the base station device 10).

[0088] In addition, terminal 20 may determine the value of k corresponding to the upper Y bits (or lower Y bits) / remaining bits of the indicator read from the single DCI from Table 9.2.3-1 described in non-patent document 3, or may determine it from a table other than Table 9.2.3-1 described in non-patent document 3.

[0089] The terminal 20 can determine the association between the CC#x and CC#y described in the embodiments 2A and 2B and each CC targeted for scheduling by the single DCI, for example, by the method described in the following embodiments 2-1 to 2-4. The embodiments 2-1 to 2-4 can be implemented in any combination.

[0090] <Example 2-1> Information indicating the association between CC#x, CC#y and each CC targeted for scheduling by single DCI is configured from base station device 10 to terminal 20 by RRC signaling (or MAC signaling). For example, information such as {CC#x, CC#y}={CC#0, CC#3} is configured from base station device 10 to terminal 20. "CC#x" etc. may be an index of the CC or an index of the cell having that CC.

[0091] In addition, multiple pieces of association information may be configured by base station device 10 to terminal 20 by RRC signaling (or MAC signaling), and then one piece of association information may be activated from base station device 10 to terminal 20 by MAC signaling (or RRC signaling, or DCI).

[0092] In addition, information indicating the correspondence between CC#x, CC#y and each CC that is the subject of scheduling by single DCI may be specified in a specification (standard), and base station device 10 and terminal 20 may determine the correspondence between CC#x, CC#y and each CC that is the subject of scheduling by single DCI in accordance with the description in the specification.

[0093] <Example 2-2> The terminal 20 (and the base station apparatus 10) determines that CC#x, CC#y and the CC index (which may be a cell index) of the CC to be scheduled correspond to each other in ascending order (or descending order).

[0094] For example, assume that the indices of CCs to be scheduled are #0 and #3. In this case, if CC#x, CC#y and the CC index correspond in ascending order, terminal 20 (and base station device 10) determines that CC#x corresponds to CC index #0 and CC#y corresponds to CC index #3. If CC#x, CC#y and the CC index correspond in descending order, terminal 20 (and base station device 10) determines that CC#y corresponds to CC index #0 and CC#x corresponds to CC index #3.

[0095] <Example 2-3> The terminal 20 (and the base station apparatus 10) determines that the SCSs of the CCs to be scheduled correspond to CC#x and CC#y in ascending order (or descending order).

[0096] For example, suppose that the SCSs of two CCs to be scheduled are 15 kHz and 30 kHz.

[0097] In this case, if CC#x, CC#y and the SCS correspond in ascending order, terminal 20 (and base station device 10) will determine that CC#x corresponds to CC (SCS = 15 kHz) and CC#y corresponds to CC (SCS = 30 kHz). If CC#x, CC#y and the SCS correspond in descending order, terminal 20 (and base station device 10) will determine that CC#x corresponds to CC (SCS = 30 kHz) and CC#y corresponds to CC (SCS = 15 kHz).

[0098] <Example 2-4> The terminal 20 (and the base station apparatus 10) determines that CC#x and CC#y are associated with each other in a cell other than "PCell, PSCell, PUCCH-SCell" and "PCell, PSCell, PUCCH-SCell."

[0099] For example, assume that CC#x corresponds to the CC of "PCell, PSCell, PUCCH-SCell" and CC#y corresponds to the CC of a cell other than "PCell, PSCell, PUCCH-SCell".

[0100] In this case, for example, it is assumed that one of the two scheduled CCs is a PCell (or a PSCell or a PUCCH-SCell), and the other CC is a CC of a cell other than "PCell, PSCell, PUCCH-SCell."

[0101] In this case, the terminal 20 (and the base station apparatus 10) determines that CC#x corresponds to a CC of the PCell (or PSCell or PUCCH-SCell) and that CC#y corresponds to a CC of a cell other than "PCell, PSCell, PUCCH-SCell".

[0102] In addition, the correspondence may be performed based on a cell type other than the cell type perspective of "PCell, PSCell, PUCCH-SCell" (cell having a PUCCH).

[0103] In the second embodiment, HARQ feedback timing can be indicated for each of multiple CCs with DCI overhead equivalent to that of Rel-15 / 16. Also, HARQ feedback timing can be flexibly indicated for each CC.

[0104] Example 3 In the third embodiment, similarly to the second embodiment, it is assumed that when the terminal 20 receives a single DCI for scheduling PDSCH reception of multiple CCs from the base station device 10, the single DCI includes one indicator. That is, also in the third embodiment, the base station device 10 transmits to the terminal 20 a single DCI for scheduling PDSCH reception of multiple CCs, including one indicator.

[0105] Terminal 20 determines each HARQ feedback timing for PDSCH reception of multiple CCs scheduled by the single DCI, based on one indicator read from the received single DCI and other parameters.

[0106] The parameter may be set (or activated) from the base station device 10 to the terminal 20 by RRC signaling or MAC signaling, or may be determined from another parameter (e.g., the SCS of the target CC), or a value specified in a specification or the like may be stored in advance in the terminal 20 (and the base station device 10).

[0107] For example, when the number of multiple CCs scheduled by a single DCI is two (CC#x and CC#y), terminal 20 determines the HARQ feedback timing (value of k) of CC#x from an indicator read from the single DCI, and calculates the HARQ feedback timing of CC#y from an equation using the k and parameters determined for CC#x.

[0108] When terminal 20 determines the HARQ feedback timing (the value of k) of CC#x from an indicator read from a single DCI, it may use Table 9.2.3-1 described in non-patent document 3, or it may use information other than Table 9.2.3-1 described in non-patent document 3.

[0109] An example of the above calculation will be described. For example, terminal 20 calculates the HARQ feedback timing of CC#y as k+s [slot].

[0110] Figure 11 shows an example in which the multiple CCs to be scheduled by a single DCI are CC#0 (SCS = 15 kHz) and CC#3 (SCS = 15 kHz), CC#0 corresponds to CC#x and CC#3 corresponds to CC#y, and the HARQ feedback timing of CC#y is calculated as k+s [slot].

[0111] In the example of Fig. 11, it is assumed that s=1 is set in terminal 20. In this case, as shown in Fig. 11, the timing of HARQ information transmission in CC#3 is delayed by one slot from the timing of HARQ information transmission in CC#0. As described above, from the viewpoint of effective use of PUCCH resources, it is desirable to set s=0 in this example, but if it is desired to make the timing of HARQ information transmission different between multiple CCs for some reason, the method of the third embodiment can be used as shown in Fig. 11.

[0112] Furthermore, terminal 20 may calculate the HARQ feedback timing of CC#y as n×k [slot].

[0113] Figure 12 shows an example in which the multiple CCs to be scheduled by a single DCI are CC#0 (SCS = 15 kHz) and CC#3 (SCS = 30 kHz), CC#0 corresponds to CC#x and CC#3 corresponds to CC#y, and the HARQ feedback timing of CC#y is calculated as n x k [slots].

[0114] In the example of Fig. 12, n=2 is set in terminal 20. In this case, as shown in Fig. 12, the timing of HARQ information transmission in CC#0 and the timing of HARQ information transmission in CC#3 become the same, and terminal 20 can transmit HARQ information in CC#0 and HARQ information in CC#3 at the same timing.

[0115] Note that n=2 may be a value that terminal 20 receives as configuration information from base station device 10, or may be a value that terminal 20 determines based on the SCS of CC#0 and the SCS of CC#3. For example, if it is assumed that the slot length is inversely proportional to the SCS value, it can be calculated as n=(SCS of CC corresponding to CC#y) / (SCS of CC corresponding to CC#x).

[0116] The terminal 20 can determine the association between the above-mentioned CC#x and CC#y and each CC targeted for scheduling by the single DCI, for example, by the method described in the following Examples 3-1 to 3-4. Examples 3-1 to 3-4 can be implemented in any combination.

[0117] <Example 3-1> Information indicating the association between CC#x, CC#y and each CC targeted for scheduling by single DCI is configured from base station device 10 to terminal 20 by RRC signaling (or MAC signaling). For example, information such as {CC#x, CC#y}={CC#0, CC#3} is configured from base station device 10 to terminal 20. "CC#x" etc. may be an index of the CC or an index of the cell having that CC.

[0118] In addition, multiple pieces of association information may be configured by base station device 10 to terminal 20 by RRC signaling (or MAC signaling), and then one piece of association information may be activated from base station device 10 to terminal 20 by MAC signaling (or RRC signaling, or DCI).

[0119] In addition, information indicating the correspondence between CC#x, CC#y and each CC that is the subject of scheduling by single DCI may be specified in a specification (standard), and base station device 10 and terminal 20 may determine the correspondence between CC#x, CC#y and each CC that is the subject of scheduling by single DCI in accordance with the description in the specification.

[0120] <Example 3-2> The terminal 20 (and the base station apparatus 10) determines that CC#x, CC#y and the CC index (which may be a cell index) of the CC to be scheduled correspond to each other in ascending order (or descending order).

[0121] For example, assume that the indices of CCs to be scheduled are #0 and #3. In this case, if CC#x, CC#y and the CC index correspond in ascending order, terminal 20 (and base station device 10) determines that CC#x corresponds to CC index #0 and CC#y corresponds to CC index #3. If CC#x, CC#y and the CC index correspond in descending order, terminal 20 (and base station device 10) determines that CC#y corresponds to CC index #0 and CC#x corresponds to CC index #3.

[0122] <Example 3-3> The terminal 20 (and the base station apparatus 10) determines that the SCSs of the CCs to be scheduled correspond to CC#x and CC#y in ascending order (or descending order).

[0123] For example, suppose that the SCSs of two CCs to be scheduled are 15 kHz and 30 kHz.

[0124] In this case, if CC#x, CC#y and the SCS correspond in ascending order, terminal 20 (and base station device 10) will determine that CC#x corresponds to CC (SCS = 15 kHz) and CC#y corresponds to CC (SCS = 30 kHz). If CC#x, CC#y and the SCS correspond in descending order, terminal 20 (and base station device 10) will determine that CC#x corresponds to CC (SCS = 30 kHz) and CC#y corresponds to CC (SCS = 15 kHz).

[0125] <Example 3-4> The terminal 20 (and the base station apparatus 10) determines that CC#x and CC#y are associated with each other in a cell other than "PCell, PSCell, PUCCH-SCell" and "PCell, PSCell, PUCCH-SCell."

[0126] For example, assume that CC#x corresponds to the CC of "PCell, PSCell, PUCCH-SCell" and CC#y corresponds to the CC of a cell other than "PCell, PSCell, PUCCH-SCell".

[0127] In this case, for example, it is assumed that one of the two scheduled CCs is a PCell (or a PSCell or a PUCCH-SCell), and the other CC is a CC of a cell other than "PCell, PSCell, PUCCH-SCell."

[0128] In this case, the terminal 20 (and the base station apparatus 10) determines that CC#x corresponds to a CC of the PCell (or PSCell or PUCCH-SCell) and that CC#y corresponds to a CC of a cell other than "PCell, PSCell, PUCCH-SCell".

[0129] In addition, the correspondence may be performed based on a cell type other than the cell type perspective of "PCell, PSCell, PUCCH-SCell" (cell having a PUCCH).

[0130] In the third embodiment, HARQ feedback timing can be indicated for each of multiple CCs with DCI overhead equivalent to that of Rel-15 / 16.

[0131] Example 4 In the fourth embodiment, similarly to the third embodiment, it is assumed that when the terminal 20 receives a single DCI for scheduling PDSCH reception of multiple CCs from the base station device 10, the single DCI includes one indicator. That is, in the fourth embodiment, the base station device 10 also includes one indicator in the single DCI for scheduling PDSCH reception of multiple CCs and transmits the single DCI to the terminal 20.

[0132] Terminal 20 determines each HARQ feedback timing for PDSCH reception of multiple CCs scheduled by the single DCI, based on one indicator read from the received single DCI and other parameters.

[0133] The parameter may be set (or activated) from the base station device 10 to the terminal 20 by RRC signaling or MAC signaling, may be determined from another parameter (e.g., the SCS of the target CC), or may be a value defined in a specification or the like that is stored in advance in the terminal 20 (and the base station device 10). Below, examples 4-1, 4-2, and 4-3 will be described as specific examples. In example 4-1, the parameter is information indicating "the SCS is the smallest", in example 4-2, the parameter is information indicating "the SCS is the largest", and in example 4-3, the parameter is information indicating "a specific SCS". The parameter may be "SCS".

[0134] <Example 4-1> First, terminal 20 determines k from one indicator included in single DCI for scheduling PDSCH reception of multiple CCs, received from base station apparatus 10. When determining k, Table 9.2.3-1 described in Non-Patent Document 3 may be used, or information other than Table 9.2.3-1 described in Non-Patent Document 3 may be used.

[0135] Next, terminal 20 determines the timing after k [slots] counting from the slot of the CC with the smallest SCS among multiple CCs for which PDSCH reception is scheduled by single DCI as the HARQ feedback timing common to these multiple CCs.

[0136] FIG. 13 shows an example in which multiple CCs to be scheduled by a single DCI are CC#0 (SCS=30 kHz) and CC#3 (SCS=15 kHz).

[0137] In the example of Fig. 13, the CC with the smallest SCS among the multiple CCs is CC#3. Therefore, after receiving the PDSCH in CC#3, terminal 20 transmits HARQ information for the PDSCH reception in CC#0 and HARQ information for the PDSCH reception in CC#3 together k slots after CC#3. Note that the PUCCH for transmitting HARQ information for the PDSCH reception in CC#0 and HARQ information for the PDSCH reception in CC#3 together may be the PUCCH of CC#0, the PUCCH of CC#3, or the PUCCH of a CC (cell) other than these.

[0138] <Example 4-2> First, terminal 20 determines k from one indicator included in single DCI for scheduling PDSCH reception of multiple CCs, received from base station apparatus 10. When determining k, Table 9.2.3-1 described in Non-Patent Document 3 may be used, or information other than Table 9.2.3-1 described in Non-Patent Document 3 may be used.

[0139] Next, terminal 20 determines the timing k [slots] later, counting from the slot of the CC with the largest SCS among multiple CCs for which PDSCH reception is scheduled by single DCI, as the HARQ feedback timing common to these multiple CCs.

[0140] FIG. 14 shows an example in which multiple CCs to be scheduled by a single DCI are CC#0 (SCS=30 kHz) and CC#3 (SCS=15 kHz).

[0141] In the example of Fig. 14, the CC with the largest SCS among multiple CCs is CC#0. Therefore, after receiving PDSCH in CC#0, terminal 20 transmits HARQ information for PDSCH reception in CC#0 and HARQ information for PDSCH reception in CC#3 together k slots after CC#0. Note that the PUCCH for transmitting HARQ information for PDSCH reception in CC#0 and HARQ information for PDSCH reception in CC#3 together may be the PUCCH of CC#0, the PUCCH of CC#3, or the PUCCH of a CC (cell) other than these.

[0142] <Example 4-3> First, terminal 20 determines k from one indicator included in single DCI for scheduling PDSCH reception of multiple CCs, received from base station apparatus 10. When determining k, Table 9.2.3-1 described in Non-Patent Document 3 may be used, or information other than Table 9.2.3-1 described in Non-Patent Document 3 may be used.

[0143] Next, terminal 20 determines the timing after k [slots] counting from the slots of a specific SCS among multiple CCs for which PDSCH reception is scheduled by single DCI as the HARQ feedback timing common to these multiple CCs.

[0144] An example in which multiple CCs to be scheduled by a single DCI are CC#0 (SCS=30 kHz) and CC#3 (SCS=15 kHz) is shown in Fig. 14 used in Example 4-2. Here, it is assumed that the specific SCS is 30 kHz.

[0145] In the example of Fig. 14, among the multiple CCs, the CC with an SCS of 30 kHz is CC#0. Therefore, after terminal 20 receives a PDSCH in CC#0, k slots after CC#0, terminal 20 transmits HARQ information for the PDSCH reception in CC#0 and HARQ information for the PDSCH reception in CC#3 together. Note that the PUCCH for transmitting HARQ information for the PDSCH reception in CC#0 and HARQ information for the PDSCH reception in CC#3 together may be the PUCCH of CC#0, may be the PUCCH of CC#3, or may be the PUCCH of a CC (cell) other than these.

[0146] According to the fourth embodiment, even if the SCSs of multiple scheduled CCs are different, HARQ feedback can be transmitted simultaneously in one PUCCH.

[0147] Example 5 Also in the fifth embodiment, it is assumed that the single DCI includes one indicator when the terminal 20 receives a single DCI for scheduling PDSCH reception of multiple CCs from the base station device 10. That is, also in the fifth embodiment, the base station device 10 includes one indicator in the single DCI for scheduling PDSCH reception of multiple CCs and transmits it to the terminal 20.

[0148] In addition, in the fifth embodiment, when the terminal 20 receives a single DCI for scheduling PDSCH reception of multiple CCs from the base station apparatus 10, it is assumed (determined) that the SCSs of the scheduled multiple CCs are the same. That is, in the fifth embodiment, when the base station apparatus 10 schedules PDSCH reception of multiple CCs by a single DCI, it determines the multiple CCs as multiple CCs with the same SCS.

[0149] Furthermore, in the fifth embodiment, when the terminal 20 receives a single DCI for scheduling PDSCH reception of multiple CCs from the base station apparatus 10, it is assumed (determined) that the timing of PDSCH reception of the scheduled multiple CCs is the same (same slot). That is, in the fifth embodiment, when scheduling PDSCH reception of multiple CCs by a single DCI, the base station apparatus 10 performs scheduling so that the PDSCH reception of the multiple CCs is the same timing.

[0150] An operation example will be described. First, terminal 20 determines k from one indicator included in single DCI for scheduling PDSCH reception of multiple CCs, received from base station apparatus 10. When determining k, Table 9.2.3-1 described in Non-Patent Document 3 may be used, or information other than Table 9.2.3-1 described in Non-Patent Document 3 may be used.

[0151] Next, terminal 20 determines the HARQ feedback timing for each of multiple CCs for which PDSCH reception is scheduled by single DCI to be k slots after PDSCH reception on each CC, and transmits HARQ information for PDSCH reception on the multiple CCs collectively at that timing.

[0152] An example in which multiple CCs to be scheduled by single DCI are CC#0 (SCS=30 kHz) and CC#3 (SCS=30 kHz) is shown in Fig. 15. As shown in Fig. 15, the slot length is the same between CCs, so HARQ information for PDSCH reception of multiple CCs can be transmitted collectively.

[0153] If the SCSs of multiple scheduled CCs are not the same, the transmission timing of HARQ information for PDSCH reception will differ between CCs, as shown in Fig. 6, resulting in inefficient use of PUCCH resources. On the other hand, in the fifth embodiment, HARQ information for PDSCH reception of multiple CCs can be transmitted collectively, making it possible to use PUCCH resources efficiently.

[0154] In the fifth embodiment, even if only one HARQ feedback timing(k) is indicated (=common among multiple CCs), HARQ information of multiple CCs can be returned to the base station device 10 in one PUCCH.

[0155] (Device configuration) Next, a functional configuration example of the base station device 10 and the terminal 20 that execute the processes and operations described above will be described. The base station device 10 and the terminal 20 include functions to implement the above-mentioned embodiments 1 to 5. However, the base station device 10 and the terminal 20 may each have only the functions of any one of the embodiments 1 to 5.

[0156] <Base station device 10> Fig. 16 is a diagram showing an example of the functional configuration of the base station device 10. As shown in Fig. 16, the base station device 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. 16 is merely an example. As long as the operation related to the embodiment of the present invention can be executed, the functional divisions and the names of the functional units may be any. The transmitting unit 110 and the receiving unit 120 may be called a communication unit.

[0157] The transmitting unit 110 has a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. The receiving unit 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 transmitting unit 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DL data, and the like to the terminal 20. The transmitting unit 110 also transmits the setting information described in the first to fifth embodiments.

[0158] The setting unit 130 stores in a storage device setting information that is set in advance and various setting information to be transmitted to the terminal 20, and reads out the information from the storage device as necessary. The control unit 140 performs, for example, resource allocation and overall control of the base station device 10. Note that the functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120. Also, the transmitting unit 110 and the receiving unit 120 may be called a transmitter and a receiver, respectively.

[0159] <Terminal 20> Fig. 17 is a diagram showing an example of the functional configuration of the terminal 20. As shown in Fig. 17, 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. 17 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. The transmitting unit 210 and the receiving unit 220 may be called a communication unit.

[0160] The transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiver 220 receives various signals wirelessly and obtains a higher layer signal from the received physical layer signal.

[0161] The setting unit 230 stores various setting information received from the base station device 10 by the receiving unit 220 in a storage device, and reads it out from the storage device as necessary. The setting unit 230 also stores setting information that is set in advance. The control unit 240 determines feedback timing, controls the entire terminal 20, and so on. Note that a functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and a functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220. Also, the transmitting unit 210 and the receiving unit 220 may be called a transmitter and a receiver, respectively.

[0162] The terminal 20 and the base station device 10 are configured as the terminal and the base station device described in the following items, for example. Also, the feedback method described below is provided.

[0163] (Configuration related to the first embodiment) (Section 1) A receiving unit that receives one piece of control information for scheduling PDSCH reception in multiple CCs from a base station device; a control unit that acquires a feedback timing index value for each of the plurality of CCs from the control information, and determines a feedback timing for each CC using the feedback timing index value; A terminal comprising: (Section 2) The control unit determines the correspondence between the CC and the feedback timing index value based on the index of the CC or the SCS of the CC. 2. The terminal described in paragraph 1. (Section 3) The control unit determines the correspondence between the CC and the feedback timing indicator value based on the type of the cell corresponding to the CC. 2. The terminal described in paragraph 1. (Section 4) A transmitter that transmits one piece of control information for scheduling PDSCH reception in multiple CCs to a terminal; a receiving unit that receives feedback information transmitted at a feedback timing determined based on a feedback timing index value for each CC in the plurality of CCs included in the control information; A base station device comprising: (Section 5) receiving one control information for scheduling PDSCH reception in multiple CCs from a base station device; obtaining a feedback timing index value for each of the plurality of CCs from the control information, and determining a feedback timing for each CC using the feedback timing index value; The feedback methods implemented by the device.

[0164] (Configuration related to Examples 2 and 5) (Section 1) A receiving unit that receives one piece of control information for scheduling PDSCH reception in multiple CCs from a base station device; a control unit that acquires one feedback timing index value from the control information and determines feedback timing for each CC in the plurality of CCs using the feedback timing index value; A terminal comprising: (Section 2) The control unit determines the feedback timing for each of the plurality of CCs based on information in a table in which a single feedback timing index value is associated with a plurality of feedback timings. The terminal according to claim 1. (Section 3) The control unit determines feedback timing for each of the plurality of CCs based on information obtained by dividing the feedback timing index value obtained from the control information according to a bit position. 2. The terminal described in paragraph 1. (Section 4) When receiving the control information for scheduling PDSCH reception in multiple CCs, the SCSs of the multiple CCs scheduled by the control information are the same. 2. The terminal described in paragraph 1. (Section 5) A transmitter that transmits one piece of control information for scheduling PDSCH reception in multiple CCs to a terminal; a receiving unit for receiving feedback information transmitted at a feedback timing determined based on one feedback timing index value included in the control information; A base station device comprising: (Section 6) receiving one control information for scheduling PDSCH reception in multiple CCs from a base station device; A feedback timing index value is obtained from the control information, and the feedback timing index value is used to determine the feedback timing for each CC in the plurality of CCs. Feedback information implemented by the terminal.

[0165] (Configuration related to Examples 3 and 4) (Section 1) A receiving unit that receives one piece of control information for scheduling PDSCH reception in multiple CCs from a base station device; a control unit that acquires one feedback timing index value from the control information, and determines feedback timing for each CC in the plurality of CCs by using the feedback timing index value and a parameter; A terminal comprising: (Section 2) The control unit determines feedback timing for another CC by using the feedback timing for the CC obtained from the feedback timing index value and the parameter. 2. The terminal described in paragraph 1. (Section 3) The control unit determines, as the feedback timing, a timing obtained by counting the number of slots obtained from the feedback timing index value based on a slot in a specific CC determined based on an SCS of each CC in the plurality of CCs. 2. The terminal described in paragraph 1. (Section 4) A transmitter that transmits one piece of control information for scheduling PDSCH reception in multiple CCs to a terminal; a receiving unit for receiving feedback information transmitted at a feedback timing determined based on one feedback timing index value included in the control information and a parameter; A base station device comprising: (Section 5) receiving one control information for scheduling PDSCH reception in multiple CCs from a base station device; A feedback timing index value is obtained from the control information, and a feedback timing for each of the plurality of CCs is determined using the feedback timing index value and a parameter. The feedback methods implemented by the device.

[0166] Any of the configurations described in the above sections provides a technology that enables a terminal to transmit HARQ information for PDSCH reception at the same timing across CCs when scheduling PDSCH reception in multiple CCs with one DCI.

[0167] (Hardware configuration) The block diagrams (FIGS. 16 and 17) 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 of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically combined, or may be realized using two or more devices that are physically or logically separated and directly or indirectly connected (e.g., using wires, wirelessly, etc.) and these multiple devices. The functional blocks may be realized by combining the one device or the multiple devices with software.

[0168] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission is called a transmitting unit or a transmitter. In either case, as described above, there is no particular limitation on the method of realization.

[0169] For example, the base station device 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. 18 is a diagram showing an example of a hardware configuration of the base station device 10 and the terminal 20 according to an embodiment of the present disclosure. The above-mentioned base station device 10 and the terminal 20 may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0170] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of the base station apparatus 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.

[0171] Each function in the base station device 10 and the terminal 20 is realized by loading a specific software (program) onto hardware such as a processor 1001, a memory device 1002, etc., so that the processor 1001 performs calculations, controls communications by the communication device 1004, and controls at least one of reading and writing of data in the memory device 1002 and the auxiliary memory device 1003.

[0172] 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.

[0173] Moreover, the processor 1001 reads out a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes according to the program. As the program, a program that causes a computer to execute at least a part of the operations described in the above-mentioned embodiment is used. For example, the control unit 140 of the base station device 10 shown in FIG. 16 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001. Also, for example, the control unit 240 of the terminal 20 shown in FIG. 17 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above-mentioned various processes have been described as being executed by one processor 1001, they may be executed by two or more processors 1001 simultaneously or sequentially. The processor 1001 may be implemented by one or more chips. The program may be transmitted from a network via a telecommunication line.

[0174] The storage device 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, 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 (primary storage device), etc. The storage device 1002 can store a program (program code), software modules, etc. that are executable to implement a communication method according to an embodiment of the present disclosure.

[0175] The auxiliary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like. The auxiliary storage device 1003 may be referred to as an auxiliary storage device. 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 auxiliary storage device 1003.

[0176] The communication device 1004 is hardware (transmission and reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, a transmission and reception antenna, an amplifier unit, a transmission and reception unit, a transmission line interface, etc. may be realized by the communication device 1004. The transmission and reception unit may be implemented as a transmission unit and a reception unit that are physically or logically separated from each other.

[0177] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0178] In addition, 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.

[0179] Furthermore, the base station device 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0180] (Supplementary embodiment) Although the embodiment of the present invention has been described above, the disclosed invention is not limited to such an embodiment, and a person skilled in the art will understand various modifications, modifications, alternatives, replacements, and the like. Although the description has been given using specific numerical examples to facilitate understanding of the invention, unless otherwise specified, those 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, and matters described in two or more items may be used in combination as necessary, and matters described in one item may be applied to matters described in another item (as long as there is no contradiction). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operations of multiple functional units may be physically performed by one part, or the operations of one functional unit may be physically performed by multiple parts. The order of the processing procedures described in the embodiment may be changed as long as there is no contradiction. For convenience of the processing description, the base station device 10 and the terminal 20 have been described using functional block diagrams, but such devices may be realized by hardware, software, or a combination thereof. The software operated by the processor possessed by the base station device 10 in accordance with an embodiment of the present invention and the software operated by the processor possessed by the terminal 20 in accordance with an embodiment of the present invention may each be stored in a random access memory (RAM), a flash memory, a read-only memory (ROM), an EPROM, an EEPROM, a register, a hard disk (HDD), a removable disk, a CD-ROM, a database, a server, or any other suitable storage medium.

[0181] 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 of these. Furthermore, the RRC signaling may be called an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0182] Each aspect / embodiment described in the present disclosure may be applied to at least one of systems using LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other suitable systems, and next-generation systems extended based on these. In addition, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A and 5G, etc.) may be applied.

[0183] The steps, sequences, flow charts, etc. of each aspect / embodiment described herein may be reordered unless inconsistent. 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.

[0184] In this specification, a specific operation performed by the base station device 10 may be performed by its upper node in some cases. In a network consisting of one or more network nodes having the base station device 10, it is clear that various operations performed for communication with the terminal 20 may be performed by the base station device 10 and at least one of other network nodes other than the base station device 10 (e.g., MME or S-GW, etc., but are not limited to these). Although the above example illustrates a case where there is one other network node other than the base station device 10, the other network node may be a combination of multiple other network nodes (e.g., MME and S-GW).

[0185] 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.

[0186] The input and output information may be stored in a specific location (e.g., memory) or may be managed using a management table. The input and output information may be overwritten, updated, or added to. The output information may be deleted. The input information may be transmitted to another device.

[0187] 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).

[0188] 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.

[0189] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using wired and / or wireless technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0190] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0191] In addition, the terms described in this disclosure and the 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). Also, a signal may be a message. Also, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0192] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0193] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by an index.

[0194] The names used for the above-mentioned parameters are not limiting in any way. Furthermore, the formulas using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUSCH, 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 limiting in any way.

[0195] In the present disclosure, terms such as "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", etc. may be used interchangeably. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc.

[0196] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0197] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0198] 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, terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0199] 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 moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving 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 include a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0200] Furthermore, the base station device in the present disclosure may be read as a terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a base station device 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 above-mentioned base station device 10. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "side"). For example, an uplink channel, a downlink channel, etc. may be read as a side channel.

[0201] Similarly, the terminal in the present disclosure may be read as a base station device. In this case, the base station device may be configured to have the functions of the terminal described above.

[0202] 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, search, inquiry (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 a memory), and the like. In addition, "judgment" and "decision" can include considering resolving, selecting, choosing, establishing, comparing, etc., to be a "judgment" or "decision." In other words, "judgment" and "decision" can include considering some action to be a "judgment" or "decision." In addition, "judgment" can be interpreted as "assuming," "expecting," "considering," etc.

[0203] 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 at least one of one or more wires, cables, and 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.

[0204] The reference signal may be abbreviated as RS (Reference Signal) and may be called a pilot depending on the applicable standard.

[0205] 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."

[0206] Any reference to an element using a designation such as "first," "second," etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient 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 precede the second element in some way.

[0207] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0208] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0209] 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.

[0210] The numerology may be communication parameters that apply to the transmission and / or reception of a signal or channel, such as, for example, at least one of a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a particular filtering operation that the transceiver performs in the frequency domain, a particular windowing operation that the transceiver performs in the time domain, etc.

[0211] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may be a time unit based on numerology.

[0212] A slot may include multiple minislots. Each minislot may be composed of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may be composed 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.

[0213] A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. The radio frame, the subframe, the slot, the minislot, and the symbol may each be referred to by a different name.

[0214] 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 the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit expressing the TTI may be called a slot, a minislot, or the like, instead of a subframe.

[0215] Here, TTI refers to, for example, the minimum 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.

[0216] 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) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI.

[0217] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0218] A TTI having a time length of 1 ms may be called 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 slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, etc.

[0219] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 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.

[0220] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0221] In addition, the time domain of the RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length. Each of one TTI, one subframe, etc. may be composed of one or more resource blocks.

[0222] Note that one or more RBs may 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.

[0223] 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.

[0224] 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 numerology on a carrier, where the common RBs may be identified by an index of the RBs relative to a common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0225] 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.

[0226] 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 replaced with "BWP".

[0227] The above-mentioned 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.

[0228] In this disclosure, where articles have been added due to translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0229] 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."

[0230] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to execution. In addition, notification of specific information (e.g., notification that "X is the case") is not limited to being done explicitly, but may be done implicitly (e.g., not notifying the specific information).

[0231] In addition, in the present disclosure, an SS block or a CSI-RS is an example of a synchronization signal or a reference signal.

[0232] 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 in the present disclosure. 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]

[0233] 10 Base station equipment 110 Transmitter 120 Receiving unit 130 Setting section 140 Control section 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. A receiving unit that receives one control information for scheduling PDSCH reception in multiple CCs from a base station device; A control unit that acquires one feedback timing index value from the control information, and determines feedback timing for each CC in the plurality of CCs using the feedback timing index value and a parameter set by the base station device, The control unit determines feedback timing for another CC by using the feedback timing for the CC obtained from the feedback timing index value and the parameter. Terminal.

2. A base station device, A transmitter that transmits one piece of control information for scheduling PDSCH reception in multiple CCs to a terminal; a receiving unit that receives, from the terminal, feedback information transmitted at a feedback timing determined based on one feedback timing index value included in the control information and a parameter set by the base station device, In the terminal, feedback timing for a certain CC obtained from the feedback timing index value and the parameter are used to determine feedback timing for another CC. Base station equipment.

3. Receive one control information for scheduling PDSCH reception on multiple CCs from the base station device; A feedback method executed by a terminal, comprising: acquiring one feedback timing index value from the control information; and determining a feedback timing for each CC in the plurality of CCs by using the feedback timing index value and a parameter set by the base station device, The terminal determines feedback timing for a certain CC obtained from the feedback timing index value and the parameter, and determines feedback timing for another CC. How to give feedback.

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