Terminal, communication system, and communication method

Abstract

This terminal comprises: a receiving unit for receiving data according to semi persistent scheduling (SPS); a control unit for postponing, to a valid uplink resource, transmission of a first channel for transmitting feedback information with respect to the data, and, if the postponed transmission of the first channel overlaps in time domain with a second channel which is another uplink channel, determining a resource for transmitting the first channel; and a transmit unit for transmitting the feedback information to a base station in the determined resource.

Description

[Technical Field]

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

[0002] The 3GPP (3rd Generation Partnership Project) is currently studying a wireless communication system called 5G or NR (New Radio) (hereinafter referred to as "NR") in order to achieve even larger system capacity, even faster data transmission speeds, and even lower latency in wireless sections. Various wireless technologies and network architectures are being studied for 5G to meet the requirements of achieving a throughput of 10 Gbps or more while keeping latency in wireless sections to 1 ms or less.

[0003] In addition, NR specifies downlink SPS (Semi-Persistent Scheduling), in which PDSCH resources are configured in advance in a terminal and activation / release is performed by DCI, thereby enabling low-latency data reception (e.g., Non-Patent Documents 1 and 2). [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 38.213 V16.3.0 (2020-09) [Non-patent document 2] 3GPP TS 38.331 V16.2.0 (2020-09) Summary of the Invention [Problem to be solved by the invention]

[0005] When an UL slot is placed after multiple consecutive DL slots, the terminal may transmit multiple HARQ-ACKs corresponding to the reception of multiple pieces of data in the UL slot following the DL slot. If the load of the HARQ-ACK payload (the density of information contained in the payload) is high, the reliability of the HARQ-ACK may decrease.

[0006] Furthermore, when postponing the transmission of HARQ-ACK, the terminal autonomously selects the next first available PUCCH resource without being instructed by the base station, and therefore a collision may occur between the postponed transmission of HARQ-ACK by one terminal and the postponed transmission of HARQ-ACK by another terminal.

[0007] If an UL cancellation indication (CI) is used to avoid collisions between a deferred HARQ-ACK transmission by one terminal and a deferred HARQ-ACK transmission by another terminal, the deferred HARQ-ACK transmission will be dropped instead of being further postponed. In other words, the use of an UL CI to avoid collisions between a deferred HARQ-ACK transmission by one terminal and a deferred HARQ-ACK transmission by another terminal is not expected.

[0008] The present invention has been made in view of the above points, and has as its object to enable a terminal that has received data to appropriately transmit feedback information regarding the data reception to a base station. [Means for solving the problem]

[0009] According to the disclosed technology, data by SPS (Semi-persistent scheduling) From the base station A receiving unit that receives the data and Response Send feedback to for 1st and a control unit for determining a resource, wherein the control unit, when the first resource overlaps with a downlink symbol, determines whether the second resource overlaps with a downlink symbol after resolving overlap between the feedback information and other UL channels in a second resource that is later than the first resource in the time domain, and further includes a transmission unit for transmitting the feedback information to the base station in the second resource when the second resource does not overlap with a downlink symbol. A terminal having the same is provided. [Effects of the Invention]

[0010] The disclosed technology provides a technology that enables a terminal that has received data to appropriately transmit feedback information regarding the data reception to a base station. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 2] 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 3] FIG. 2 is a sequence diagram illustrating a basic operation of the wireless communication system according to the embodiment of the present invention. [Figure 4] A diagram showing an example of SPS HARQ-ACK. [Figure 5] FIG. 10 is a diagram showing an example (1) in which SPS HARQ-ACK collides with another UL channel. [Figure 6] FIG. 10 is a diagram showing an example (2) in which SPS HARQ-ACK collides with another UL channel. [Figure 7] 10 is a flowchart illustrating an example (1) of SPS HARQ-ACK transmission according to an embodiment of the present invention. [Figure 8] 10 is a flowchart illustrating an example (2) of SPS HARQ-ACK transmission according to an embodiment of the present invention. [Figure 9] 10 is a flowchart illustrating an example (3) of SPS HARQ-ACK transmission according to an embodiment of the present invention. [Figure 10] 10 is a flowchart illustrating an example (4) of SPS HARQ-ACK transmission according to an embodiment of the present invention. [Figure 11] 10 is a flowchart illustrating an example (5) of SPS HARQ-ACK transmission according to an embodiment of the present invention. [Figure 12] 10 is a flowchart illustrating an example (6) of SPS HARQ-ACK transmission according to an embodiment of the present invention. [Figure 13] 10 is a flowchart illustrating an example (7) of SPS HARQ-ACK transmission according to an embodiment of the present invention. [Figure 14] 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention. [Figure 15] FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to the embodiment of the present invention. [Figure 16] 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

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

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

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

[0016] Base station 10 is capable of performing carrier aggregation, which aggregates multiple cells (multiple CCs (component carriers)) to communicate with terminal 20. In carrier aggregation, one PCell (primary cell) and one or more SCells (secondary cells) are used.

[0017] The base station 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 transmitted, for example, on the NR-PBCH or PDSCH, and is also called broadcast information. As shown in FIG. 1 , the base station 10 transmits control signals or data to the terminal 20 on the DL (Downlink) and receives control signals or data from the terminal 20 on the UL (Uplink). Note that, here, what is transmitted on a control channel such as the PUCCH or PDCCH is called a control signal, and what is transmitted on a shared channel such as the 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, or an M2M (Machine-to-Machine) communication module. As shown in Fig. 1, the terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 may be referred to as a UE, and the base station 10 may be referred to as a gNB.

[0019] Terminal 20 is capable of performing carrier aggregation, which aggregates multiple cells (multiple CCs (component carriers)) to communicate with base station 10. In carrier aggregation, one PCell (primary cell) and one or more SCells (secondary cells) are used. Also, a PUCCH-SCell having a PUCCH may be used.

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

[0021] A cell group provided by base station 10A, which is an MN, is called an MCG (Master Cell Group), and a cell group provided by base station 10B, which is an SN, is called an SCG (Secondary Cell Group). In addition, in a DC, an MCG is composed of one PCell and one or more SCells, and an SCG is composed of one PSCell (Primary SCell) and one or more SCells.

[0022] The processing operations in this embodiment may be executed in the system configuration shown in FIG. 1, in the system configuration shown in FIG. 2, or in any other system configuration.

[0023] (Basic operation example) An example of a basic operation of the communication system according to the embodiment of the present invention will be described with reference to Fig. 3. This operation is basically common to Examples 1 to 10 described later.

[0024] In S101, by RRC signaling, base station 10 transmits downlink SPS configuration information, PUCCH resource configuration information, slot format configuration information, etc. to terminal 20, and terminal 20 receives this configuration information. Note that since this embodiment targets downlink SPS, hereinafter, "SPS" means downlink SPS.

[0025] The slot format configuration information is, for example, tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated, and this configuration information determines whether the TDD configuration for each symbol in each of one or more slots is DL, UL, or flexible. Hereinafter, this configuration information will be referred to as semi-static TDD configuration information. Flexible may also be abbreviated as F. Terminal 20 basically determines DL / UL / F for each symbol in each slot according to the semi-static TDD configuration information.

[0026] In addition, multiple slot format candidates may be notified as the setting information in S101 to enable dynamic switching of the slot format. This setting information is, for example, SlotFormatCombinationsPerCell. Since this information is information consisting of slot format (SF) IDs, this information will be referred to as SFI setting information hereinafter.

[0027] In S102, terminal 20 receives DCI activating the SPS configuration from base station 10, and in S103 receives data in the PDSCH resource according to the SPS configuration. In S104, terminal 20 transmits an SPS HARQ-ACK to base station 10 in the PUCCH resource (or PUSCH resource if there is UL scheduling) of the slot at the time position specified by the DCI. Note that the SPS HARQ-ACK may also be referred to as an HARQ-ACK. Furthermore, the HARQ-ACK may also be referred to as HARQ information, feedback information, etc.

[0028] The terminal 20 may receive DCI from the base station 10 at S102 or before or after that, which dynamically specifies a slot format. This DCI is control information that specifies the ID to actually use from among the IDs of multiple slot formats set by the SFI setting information. When a slot format is specified by this DCI, the terminal 20 determines DL / UL / F of each symbol in each slot according to the slot format instead of the semi-static TDD setting information. This DCI information is called dynamic SFI specification information (or dynamic SFI, or SFI).

[0029] (About the assignment) As described above, each time terminal 20 receives data via SPS, the activation DCI specifies the time position (slot) at which to transmit HARQ-ACK using PUCCH resources.

[0030] However, particularly when multiple short-period SPSs are configured in terminal 20, depending on the TDD DL / UL configuration in the slot at the specified time position (configuration using semi-static TDD configuration information or dynamic SFI specification information), the symbol position at which the PUCCH resource is configured may collide with the DL symbol or F symbol, making it impossible to transmit HARQ-ACK.

[0031] When a PUCCH resource collides with a DL symbol or an F symbol, it is possible to drop the HARQ-ACK, but dropping the HARQ-ACK requires retransmission of the PDSCH, which is undesirable as it increases delay.

[0032] (background) An example of the above-mentioned collision is shown in Fig. 4. In the example of Fig. 4, the third slot immediately following the slot in which the PDSCH is received is designated as the slot for transmitting the HARQ-ACK, but if this slot corresponds to DL, the HARQ-ACK is dropped.

[0033] In this embodiment, it is possible to prevent HARQ-ACK from being dropped due to collision between PUCCH resources and DL symbols / F symbols.

[0034] Specifically, for example, as shown in FIG. 4, when terminal 20 determines that a collision occurs between a PUCCH resource and a DL symbol / F symbol, it postpones transmission until the next available UL resource and transmits HARQ-ACK.

[0035] At the 3GPP meeting, it was agreed to make an enhancement to R.17 to avoid dropping of HARQ-ACK of SPS due to collision of PUCCH with at least one "DL or F symbol" in TDD.

[0036] As an enhancement method to avoid dropping the HARQ-ACK of the SPS due to the PUCCH colliding with at least one "DL symbol or F symbol", the terminal 20 postpones the HARQ-ACK until the first available valid PUCCH resource.

[0037] To postpone the transmission of the HARQ-ACK for the SPS, it is important to determine which PUCCH resource to use to transmit the HARQ-ACK for the SPS. If the PUCCH resource determined for transmitting the HARQ-ACK for the SPS does not overlap or is not multiplexed with other UL channels (e.g., PUCCH or PUSCH) in the time domain, the K1 value, which indicates the offset from the data to the corresponding HARQ-ACK, can be increased to a slot or subslot where a valid PUCCH resource exists. Note that there may be other limitations on the postponement, such as a maximum limit on the K1 value, whether the postponed resource is applicable, etc.

[0038] On the other hand, if the PUCCH resource determined for transmitting the HARQ-ACK of the postponed SPS overlaps or is multiplexed in the time domain with other UL channels (e.g., PUCCH or PUSCH), the result of determining which slot or subslot to use for transmitting the HARQ-ACK of the postponed SPS may affect the UL multiplexing operation.

[0039] Figure 5 is a diagram showing an example (1) in which an SPS HARQ-ACK collides with another UL channel. In Figure 5, "D" corresponds to a DL symbol, "F" corresponds to a flexible symbol, and "U" corresponds to an UL symbol. As shown in Figure 5, the PUCCH resource for transmitting the SPS HARQ-ACK collides with an invalid symbol (e.g., a D symbol or an F symbol). Meanwhile, other UL channels that are the target of UL multiplexing do not collide with the invalid symbol.

[0040] Figure 6 shows an example (2) of a collision between the SPS HARQ-ACK and other UL channels. As shown in Figure 6, the PUCCH resource for transmitting the SPS HARQ-ACK does not collide with invalid symbols. However, other UL channels that are the targets of UL multiplexing collide with invalid symbols.

[0041] As shown in Figure 5 or Figure 6, when the PUCCH transmitting the HARQ-ACK of the deferred SPS overlaps with other UL channels, the execution order regarding two considerations, for example, multiplexing and TDD configuration, affects the operation.

[0042] (Embodiment) Therefore, the method described below may be applied to determining a PUCCH resource for transmitting a HARQ-ACK for a postponed SPS that may collide with another UL channel within a slot or sub-slot. Note that, in the following, "overlapping" may be replaced with "multiplexed."

[0043] 7 is a flowchart for explaining an example (1) of SPS HARQ-ACK transmission in an embodiment of the present invention. In step S201, terminal 20 determines a PUCCH resource for the postponed SPS HARQ-ACK. Next, it is determined whether or not the PUCCH resource overlaps with another UL channel (S202). If they overlap (YES in S202), the process proceeds to step S203; if they do not overlap (NO in S202), the process proceeds to step S206.

[0044] In step S203, terminal 20 determines resources for multiplexing SPS HARQ-ACK and other UL channels, and proceeds to step S204. Next, terminal 20 determines whether the determined multiplexing resources and invalid symbols overlap (S204). If they overlap (YES in S204), terminal 20 proceeds to step S205, and if they do not overlap (NO in S204), terminal 20 proceeds to step S206.

[0045] In step S205, terminal 20 drops the SPS HARQ-ACK. Meanwhile, in step S206, terminal 20 transmits the SPS HARQ-ACK using the determined resource.

[0046] As described above, the multiplexing process may be performed first, and the TDD configuration confirmation process may be performed second. Also, whether the SPS HARQ-ACK can be postponed may be determined depending on whether the resource multiplexing the SPS HARQ-ACK and other UL channels collides with invalid symbols.

[0047] Fig. 8 is a flowchart for explaining an example (2) of SPS HARQ-ACK transmission in an embodiment of the present invention. Another example starting from YES in step S204 shown in Fig. 7 is shown using Fig. 8. In step S301, terminal 20 determines whether or not a condition for further postponing transmission of SPS HARQ-ACK is met. The condition for further postponing may be one or more of 1) to 4) shown below.

[0048] 1) Maximum value of K1 2) TDD collisions with semi-static DL symbols 3) TDD conflicts with semi-static flexible symbols 4) Other conditions required for postponement

[0049] If the conditions for further postponement are met (YES in S301), the process proceeds to step S302, and if the conditions for further postponement are not met (NO in S301), the process proceeds to step S303. In step S302, the terminal 20 postpones transmission and transmits the SPS HARQ-ACK in the next slot or subslot. On the other hand, in step S303, the terminal 20 drops the SPS HARQ-ACK.

[0050] 9 is a flowchart illustrating an example (3) of SPS HARQ-ACK transmission according to an embodiment of the present invention. Another example starting from YES in step S204 shown in FIG. 7 is shown using FIG. 9. In step S401, terminal 20 determines whether the PUCCH resource determined in step S201 overlaps with an invalid symbol. If there is overlap (YES in S401), the process proceeds to step S402; if there is no overlap (NO in S401), the process proceeds to step S403. In step S402, terminal 20 drops the SPS HARQ-ACK. On the other hand, in step S403, terminal 20 transmits the SPS HARQ-ACK using the PUCCH resource determined in S201 without multiplexing.

[0051] 10 is a flowchart illustrating an example (4) of SPS HARQ-ACK transmission according to an embodiment of the present invention. Using FIG. 10, another example starting from YES in step S204 shown in FIG. 7 is shown. In step S501, terminal 20 determines whether the PUCCH resource determined in step S201 overlaps with an invalid symbol. If it overlaps (YES in S501), the process proceeds to step S402. If it does not overlap (NO in S501), the process proceeds to step S503. In step S502, terminal 20 determines whether a condition for further postponing transmission of the SPS HARQ-ACK is met. If the condition for further postponement is met (YES in S502), the process proceeds to step S503. If the condition for further postponement is not met (NO in S502), the process proceeds to step S504. In step S503, terminal 20 postpones transmission and transmits the SPS HARQ-ACK in the next slot or subslot. On the other hand, in step S504, terminal 20 drops the SPS HARQ-ACK. Also, in step S505, terminal 20 transmits the SPS HARQ-ACK without multiplexing using the PUCCH resource determined in S201.

[0052] 11 is a flowchart for explaining an example (5) of SPS HARQ-ACK transmission in an embodiment of the present invention. In step S601, terminal 20 determines a PUCCH resource for the postponed SPS HARQ-ACK. Subsequently, terminal 20 determines whether the PUCCH resource overlaps with an invalid symbol (S602). If there is an overlap (YES in S602), the process proceeds to step S603, and if there is no overlap (NO in S602), the process proceeds to step S604.

[0053] In step S603, terminal 20 drops the SPS HARQ-ACK. Meanwhile, in step S604, terminal 20 determines whether or not the invalid symbols overlap with other UL channels. If they overlap (YES in S604), the process proceeds to step S605; if they do not overlap (NO in S604), the process proceeds to step S606. In step S605, terminal 20 transmits the SPS HARQ-ACK using the PUCCH resource determined in S201 without multiplexing.

[0054] Meanwhile, in step S606, terminal 20 determines resources for multiplexing SPS HARQ-ACK and other UL channels, and proceeds to step S607. Next, it is determined whether the determined multiplexing resources and invalid symbols overlap (S607). If they overlap (YES in S607), it proceeds to step S608, and if they do not overlap (NO in S607), it proceeds to step S609.

[0055] In step S608, the terminal 20 drops the SPS HARQ-ACK. Meanwhile, in step S609, the terminal 20 transmits the SPS HARQ-ACK using the determined resource.

[0056] As described above, the process related to checking the TDD configuration may be performed first, and the process related to multiplexing may be performed second. Whether the SPS HARQ-ACK can be postponed may be determined depending on whether the resource for the postponed SPS HARQ-ACK collides with invalid symbols.

[0057] 12 is a flowchart for explaining an example (6) of SPS HARQ-ACK transmission according to an embodiment of the present invention. Another example starting from YES in step S602 or S607 shown in FIG. 11 will be described with reference to FIG.

[0058] In step S701, terminal 20 determines whether or not the conditions for further postponing the transmission of the SPS HARQ-ACK are met. If the conditions for further postponing are met (YES in S701), the process proceeds to step S702. If the conditions for further postponing are not met (NO in S701), the process proceeds to step S703. In step 702, terminal 20 postpones the transmission and transmits the SPS HARQ-ACK in the next slot or subslot. On the other hand, in step S703, terminal 20 drops the SPS HARQ-ACK.

[0059] Fig. 13 is a flowchart for explaining an example (7) of SPS HARQ-ACK transmission in an embodiment of the present invention. Another example starting from YES in step S607 shown in Fig. 11 is shown using Fig. 13. In step S801, terminal 20 transmits SPS HARQ-ACK without multiplexing using the PUCCH resource determined in S601.

[0060] Here, the following cases A) to C) are assumed as cases in which HARQ-ACKs of postponed SPSs are multiplexed.

[0061] A) A case in which the HARQ-ACK of the postponed SPS is multiplexed with one or more HARQ-ACKs associated with DCI and applying the same codebook type (CB type). B) Case where PUCCH transmitting HARQ-ACK of postponed SPS overlaps with PUCCH carrying P-CSI (Periodic CSI) / SP-CSI (Semi-persistent CSI) C) Case where PUCCH transmitting HARQ-ACK of postponed SPS overlaps with DG (Dynamic grant) / CG (Configured grant)

[0062] In addition, for SPS HARQ-ACK, if there are other conditions other than collision due to TDD setting, it is assumed that all such other conditions are satisfied in the embodiment of the present invention. Also, it is assumed that the processing time required for multiplexing is satisfied in the embodiment of the present invention.

[0063] The conditions for further postponing the HARQ-ACK transmission of the SPS may be one or more of the following 1)-4).

[0064] 1) Maximum value of K1 2) TDD collisions with semi-static DL symbols 3) TDD conflicts with semi-static flexible symbols 4) Other conditions required for postponement

[0065] In addition, the candidate PUCCH resources for determining the PUCCH resource in the slot or subslot in which the HARQ-ACK of the postponed SPS is transmitted may be a PUCCH resource that transmits only the HARQ-ACK of the SPS, or may be a PUCCH resource that further includes a dynamic HARQ-ACK or other configured PUCCH resources.

[0066] The following describes the case where the above A) HARQ-ACK of the postponed SPS is multiplexed with one or more HARQ-ACKs associated with DCI and applying the same codebook type.

[0067] In the current specification, according to the HARQ-ACK CB generation procedure, all HARQ-ACK bits using the same CB type are included in one HARQ-ACK CB and transmitted on the PUCCH resource configured for HARQ-ACK associated with DCI, which is not expected to collide with invalid symbols.

[0068] In the method of postponing the HARQ-ACK of an SPS described in Figures 7 to 10 (hereinafter referred to as "Option 1"), terminal 20 may transmit the HARQ-ACK of the postponed SPS as a dynamic HARQ-ACK bit in the PUCCH resource for transmitting the dynamic HARQ-ACK.

[0069] In the method of postponing the HARQ-ACK of an SPS described in Figures 11 to 13 (hereinafter referred to as "Option 2"), terminal 20 may determine a PUCCH resource for transmitting the HARQ-ACK of the postponed SPS in the slot or subslot in which the HARQ-ACK bit of the target SPS is transmitted.

[0070] If the determined PUCCH resource does not collide with invalid symbols, multiplexing may be applied. Terminal 20 may transmit the HARQ-ACK of the deferred SPS as a dynamic HARQ-ACK bit in the PUCCH resource for dynamic HARQ-ACK.

[0071] If the determined PUCCH resource collides with an invalid symbol, the HARQ-ACK for the SPS may be dropped. Also, if the determined PUCCH resource collides with an invalid symbol, terminal 20 may postpone the transmission of the HARQ-ACK for the SPS if the condition for further postponement is met, or may drop the HARQ-ACK for the SPS if the condition for further postponement is not met.

[0072] The following describes the case where the PUCCH transmitting the HARQ-ACK of the postponed SPS overlaps with the PUCCH carrying the periodic CSI (P-CSI) / semi-persistent CSI (SP-CSI) described above under B).

[0073] In the current specification, when a HARQ-ACK for a delayed SPS is transmitted in the same slot or subslot as a HARQ-ACK associated with DCI, the HARQ-ACK is transmitted in a dynamic HARQ-ACK resource and may be multiplexed based on the overlap between the dynamic HARQ-ACK resource and the PUCCH resource for CSI. If only the HARQ-ACK for an SPS is allocated to a slot or subslot, it is sufficient to consider the case where it is multiplexed with the PUCCH for P-CSI / SP-CSI.

[0074] In option 1, if the multiplexed CSI resource does not collide with invalid symbols, the HARQ-ACK of the SPS can be postponed to the slot or subslot where the CSI resource is located, and the postponed HARQ-ACK of the SPS may be multiplexed with the P-CSI / SP-CSI and transmitted on the CSI resource.

[0075] In option 1, if the CSI resource to be multiplexed collides with an invalid symbol (this can occur with SP-CSI / A-CSI (Aperiodic CSI) because there is no associated DCI), terminal 20 may drop the HARQ-ACK for the SPS. Also, in option 2, if the CSI resource to be multiplexed collides with an invalid symbol, terminal 20 may postpone the transmission of the HARQ-ACK for the SPS to the next slot or subslot if a condition for further postponement is met, or may drop the HARQ-ACK for the SPS if the condition is not met.

[0076] Furthermore, in option 1, when the multiplexed CSI resource collides with an invalid symbol, terminal 20 may check whether the PUCCH resource for the HARQ-ACK of the postponed SPS before multiplexing collides with the invalid symbol. If there is no collision, terminal 20 may transmit the HARQ-ACK of the SPS on the PUCCH resource for the HARQ-ACK of the postponed SPS before multiplexing. If there is a collision, terminal 20 may drop the HARQ-ACK of the SPS, or may further postpone the transmission of the HARQ-ACK of the SPS to the next slot or subslot if a condition for postponement is met, or may drop the HARQ-ACK of the SPS if the condition is not met.

[0077] In option 2, in the case where the PUCCH resource for HARQ-ACK of the postponed SPS does not collide with an invalid symbol, the terminal 20 may perform the operation shown in 1) or 2) below.

[0078] 1) If a P-CSI / SP-CSI resource collides with an invalid symbol, it may not be multiplexed with CSI, and the HARQ-ACK of the postponed SPS may be transmitted in the slot or subslot where the P-CSI / SP-CSI resource is located.

[0079] 2) If the P-CSI / SP-CSI resource does not collide with an invalid symbol, the multiplexing resource may be determined. If the multiplexing resource does not collide with an invalid symbol, multiplexing is applied, and the SPS HARQ-ACK may be multiplexed and transmitted on the multiplexing resource. If the multiplexing resource collides with an invalid symbol, the multiplexed channel is not transmitted, and terminal 20 may drop the SPS HARQ-ACK. Furthermore, if a condition for postponement is met, terminal 20 may postpone the SPS HARQ-ACK transmission to the next slot or subslot, or if the condition is not met, terminal 20 may drop the SPS HARQ-ACK. Furthermore, if the multiplexing resource collides with an invalid symbol, terminal 20 may transmit the SPS HARQ-ACK on the PUCCH resource for the postponed SPS HARQ-ACK before multiplexing.

[0080] In option 2, in the case where the PUCCH resource for the postponed SPS HARQ-ACK collides with an invalid symbol, terminal 20 may drop the SPS HARQ-ACK, or may further postpone the SPS HARQ-ACK transmission to the next slot or sub-slot if the conditions for postponement are met, or may drop the SPS HARQ-ACK if the conditions are not met.

[0081] The above C) case where the PUCCH transmitting the HARQ-ACK of the postponed SPS overlaps with the DG (Dynamic grant) / CG (Configured grant) will be described below.

[0082] In the current specification, when a HARQ-ACK of a delayed SPS is transmitted in the same slot or subslot as a HARQ-ACK associated with a DCI, the HARQ-ACK is transmitted in a dynamic HARQ-ACK resource and may be multiplexed based on the overlap between the dynamic HARQ-ACK resource and the PUSCH resource of the CG / DG. If only the HARQ-ACK of the SPS is arranged in a slot or subslot, it is sufficient to consider the case where it is multiplexed with the PUSCH of the CG / DG.

[0083] Below, a case 1 will be described in which a PUSCH is multiplexed with a PUSCH of a DG / CG that is not repeatedly transmitted, or a PUSCH of a DG that is repeatedly transmitted only once.

[0084] Case 1 includes cases where a DG-PUSCH that does not perform repeated transmission overlaps with a PUCCH that transmits a HARQ-ACK for a postponed SPS, cases where a PUSCH repetition type A that performs repeated transmission only once overlaps with a PUCCH that transmits a HARQ-ACK for a postponed SPS, and cases where a PUSCH repetition type B that performs repeated transmission one or more times overlaps with a PUCCH that transmits a HARQ-ACK for a postponed SPS.

[0085] In option 1, if the overlapping DG / CG-PUSCH (repetition) does not collide with invalid symbols, the HARQ-ACK of the SPS can be postponed to the slot or sub-slot where the DG / CG-PUSCH is located and may be transmitted overlapping with the DG / CG-PUSCH.

[0086] In option 1, if the overlapping DG / CG-PUSCH (repetition) collides with an invalid symbol, the HARQ-ACK for the SPS may be dropped. Also, in option 1, if the overlapping DG / CG-PUSCH (repetition) collides with an invalid symbol, the HARQ-ACK transmission for the SPS may be postponed to the next slot or subslot if the conditions for postponement are met, or the HARQ-ACK for the SPS may be dropped if the conditions are not met.

[0087] Furthermore, in option 1, if the overlapping DG / CG-PUSCH (repetition) collides with invalid symbols, the TDD setting of the PUCCH resource for the HARQ-ACK of the postponed SPS before multiplexing may be checked. If the PUCCH resource for the HARQ-ACK of the postponed SPS before multiplexing does not collide with invalid symbols, the HARQ-ACK of the SPS may be transmitted on the PUCCH resource for the HARQ-ACK of the postponed SPS before multiplexing. If the PUCCH resource for the HARQ-ACK of the postponed SPS before multiplexing collides with invalid symbols, the HARQ-ACK of the SPS may be dropped, or if a condition for further postponement is met, the HARQ-ACK transmission of the SPS may be postponed to the next slot or subslot, or if the condition is not met, the HARQ-ACK of the SPS may be dropped.

[0088] In option 2, in the case where the PUCCH resource for HARQ-ACK of the postponed SPS does not collide with an invalid symbol, the terminal 20 may perform the operation shown in 1) or 2) below.

[0089] 1) If the DG / CG-PUSCH (repetition) collides with an invalid symbol, it does not need to be multiplexed with the DG / CG-PUSCH, and the HARQ-ACK of the postponed SPS may be transmitted in the slot or sub-slot where the DG / CG-PUSCH is located.

[0090] 2) If the DG / CG-PUSCH (repetition) does not collide with invalid symbols, the HARQ-ACK of the postponed SPS may be multiplexed and transmitted overlapping with the DG / CG-PUSCH (repetition).

[0091] In option 2, in the case where the PUCCH resource for the postponed SPS HARQ-ACK collides with an invalid symbol, terminal 20 may drop the SPS HARQ-ACK, or may further postpone the SPS HARQ-ACK transmission to the next slot or sub-slot if the conditions for postponement are met, or may drop the SPS HARQ-ACK if the conditions are not met.

[0092] Case 2 in which the PUSCHs of multiple DG / CGs are multiplexed and repeatedly transmitted will be described below.

[0093] Case 2 includes the case where the HARQ-ACK of the deferred SPS overlaps with multiple repeated transmissions of PUSCH repetition type A.

[0094] In option 1, if at least one overlapping DG / CG-PUSCH repetition does not collide with an invalid symbol, the HARQ-ACK of the SPS can be postponed to the slot or sub-slot where the DG / CG-PUSCH is located and may be transmitted overlapping with that DG / CG-PUSCH repetition.

[0095] In option 1, if an overlapping DG / CG-PUSCH repetition collides with an invalid symbol, the HARQ-ACK for the SPS may be dropped. Also, in option 1, if an overlapping DG / CG-PUSCH repetition collides with an invalid symbol, the HARQ-ACK transmission for the SPS may be postponed to the next slot or subslot if the conditions for postponement are met, or may be dropped if the conditions are not met.

[0096] Furthermore, in option 1, if overlapping DG / CG-PUSCH repetitions collide with invalid symbols, the TDD configuration of the PUCCH resource for the HARQ-ACK of the postponed SPS before multiplexing may be checked. If the PUCCH resource for the HARQ-ACK of the postponed SPS before multiplexing does not collide with invalid symbols, the HARQ-ACK of the SPS may be transmitted on the PUCCH resource for the HARQ-ACK of the postponed SPS before multiplexing. If the PUCCH resource for the HARQ-ACK of the postponed SPS before multiplexing collides with invalid symbols, the HARQ-ACK of the SPS may be dropped, or if a condition for postponement is met, the HARQ-ACK transmission of the SPS may be postponed to the next slot or subslot, or if the condition is not met, the HARQ-ACK of the SPS may be dropped.

[0097] In option 2, in the case where the PUCCH resource for HARQ-ACK of the postponed SPS does not collide with an invalid symbol, the terminal 20 may perform the operation shown in 1) or 2) below.

[0098] 1) If all DG / CG-PUSCH repetitions collide with invalid symbols, they may not be multiplexed with the DG / CG-PUSCH, and the HARQ-ACK of the postponed SPS may be transmitted in the slot or sub-slot where the DG / CG-PUSCH is located.

[0099] 2) If at least one DG / CG-PUSCH repetition does not collide with an invalid symbol, the HARQ-ACK of the postponed SPS may be multiplexed and transmitted overlapping with the corresponding DG / CG-PUSCH repetition.

[0100] In option 2, in the case where the PUCCH resource for the postponed SPS HARQ-ACK collides with an invalid symbol, terminal 20 may drop the SPS HARQ-ACK, or may further postpone the SPS HARQ-ACK transmission to the next slot or sub-slot if the conditions for postponement are met, or may drop the SPS HARQ-ACK if the conditions are not met.

[0101] (Application example) In the above embodiments, any method may be used to verify and determine the PUCCH resource based on the transmission direction of the symbol.

[0102] Which of the above-mentioned Option 1 and Option 2 is applied may be determined depending on the type of multiplexing. For example, different options may be applied when multiplexing with dynamic HARQ-ACK, when multiplexing with PUCCH of SP-CSI / P-CSI, and when multiplexing with PUSCH repetition type B. Furthermore, which of the above-mentioned Option 1 and Option 2 is applied may be determined based on higher layer parameters, may be determined based on UE capabilities reported from terminal 20, may be specified in advance in specifications, or may be determined based on settings of higher layer parameters and UE capabilities.

[0103] (UE capability information) In the case of the TDD scheme, to avoid dropping of HARQ-ACK of SPS due to collision between at least one "DL symbol or F symbol" and PUCCH resources, UE capability information indicating whether the terminal 20 supports the functions shown in 1) and 2) below may be used. The UE capability information is notified from the terminal 20 to the base station 10, and the base station 10 can notify the terminal 20 of, for example, an applicable resource region pattern based on the UE capability information.

[0104] 1) In the case of the TDD method, UE capability information indicating whether the UE supports HARQ-ACK postponement. 2) UE capability information indicating whether the UE supports the function of configuring applicable resource region patterns for HARQ-ACK postponement.

[0105] (Device configuration) Next, a description will be given of an example of the functional configuration of the base station 10 and the terminal 20 that execute the processes and operations described above. The base station 10 and the terminal 20 include functions for executing the above-described embodiments. However, the base station 10 and the terminal 20 may each include only the functions proposed in any of the embodiments.

[0106] <Base station 10> Fig. 14 is a diagram showing an example of the functional configuration of the base station 10. As shown in Fig. 14, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Fig. 14 is merely an example. The names of the functional divisions and functional units may be any as long as they can perform the operations related to the embodiment of the present invention. The transmitting unit 110 and the receiving unit 120 may be called a communication unit.

[0107] The transmitter 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The receiver 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signals. The transmitter 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DL data, etc. to the terminal 20. The transmitter 110 also transmits the setting information, etc., described in Options 1 and 2.

[0108] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in a storage device, and reads out the information from the storage device as needed. The control unit 140 performs, for example, resource allocation and overall control of the base station 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. Furthermore, the transmitting unit 110 and the receiving unit 120 may be called a transmitter and a receiver, respectively.

[0109] <Terminal 20> Fig. 15 is a diagram showing an example of the functional configuration of the terminal 20. As shown in Fig. 15, 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. 15 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.

[0110] The transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiver 220 receives various signals wirelessly and acquires higher layer signals from the received physical layer signals. The transmitter 210 also transmits HARQ-ACK, and the receiver 220 receives the setting information and the like described in Options 1 and 2.

[0111] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 in a storage device, and reads it out from the storage device as needed. The setting unit 230 also stores setting information that is set in advance. The control unit 240 performs overall control of the terminal 20. Note that the functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220. Note that the transmitting unit 210 and the receiving unit 220 may be called a transmitter and a receiver, respectively.

[0112] (Summary of the embodiment) As described above, according to an embodiment of the present invention, there is provided a terminal including: a receiving unit that receives data according to SPS (Semi Persistent Scheduling); a control unit that postpones transmission of a first channel that transmits feedback information for the data until an available uplink resource and, when the postponed transmission of the first channel overlaps in the time domain with a second channel that is another uplink channel, determines a resource for transmitting the first channel; and a transmitting unit that transmits the feedback information to a base station on the determined resource.

[0113] With the above configuration, terminal 20 can resolve overlap with other UL channels and overlap with invalid resources for the resources for transmitting the HARQ-ACK corresponding to the SPS, determine appropriate resources for transmitting the HARQ-ACK, and transmit the HARQ-ACK to base station 10. In other words, a terminal that has received data can appropriately transmit feedback information regarding the data reception to the base station.

[0114] The control unit may perform a first process related to multiplexing the first channel and the second channel, and a second process of confirming whether the first channel and the second channel are allocated to valid uplink resources. With this configuration, terminal 20 can resolve overlap with other UL channels and overlap with invalid resources regarding resources for transmitting HARQ-ACK corresponding to SPS, and determine appropriate resources for transmitting HARQ-ACK.

[0115] The control unit may be able to set which of the first process and the second process is to be executed first. With this configuration, terminal 20 can resolve overlap with other UL channels and overlap with invalid resources for the resource for transmitting the HARQ-ACK corresponding to the SPS, and determine an appropriate resource for transmitting the HARQ-ACK.

[0116] If the control unit cannot determine valid uplink resources for transmitting the first channel after performing the first process and the second process, the control unit may further postpone transmission of the first channel. With this configuration, terminal 20 can determine appropriate resources for transmitting HARQ-ACK corresponding to SPS by resolving overlap with other UL channels and overlap with invalid resources.

[0117] If, after performing the first process and the second process, the control unit cannot determine valid uplink resources for transmitting the first channel and if the maximum value of the offset from data to feedback information transmission is not exceeded, the control unit may further postpone transmission of the first channel. With this configuration, terminal 20 can determine appropriate resources for transmitting HARQ-ACK corresponding to SPS by resolving overlap with other UL channels and overlap with invalid resources.

[0118] Furthermore, according to an embodiment of the present invention, there is provided a communication method in which a terminal executes a receiving procedure for receiving data according to SPS (Semi Persistent Scheduling), a control procedure for postponing transmission of a first channel for transmitting feedback information for the data until an available uplink resource and, when the postponed transmission of the first channel overlaps in the time domain with a second channel, which is another uplink channel, a control procedure for determining a resource for transmitting the first channel, and a transmission procedure for transmitting the feedback information to a base station on the determined resource.

[0119] With the above configuration, terminal 20 can resolve overlap with other UL channels and overlap with invalid resources for the resources for transmitting the HARQ-ACK corresponding to the SPS, determine appropriate resources for transmitting the HARQ-ACK, and transmit the HARQ-ACK to base station 10. In other words, a terminal that has received data can appropriately transmit feedback information regarding the data reception to the base station.

[0120] (Hardware configuration) The block diagrams (FIGS. 14 and 15) used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining the single device or the multiple devices with software.

[0121] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocation, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0122] For example, the base station 10, the terminal 20, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 16 is a diagram illustrating an example of the hardware configuration of the base station 10 and the terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 described above may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0123] In the following description, the term "apparatus" can be read as a circuit, a device, a unit, etc. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0124] Each function in the base station 10 and the terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001, the memory device 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls at least one of reading and writing data in the memory device 1002 and the auxiliary memory device 1003.

[0125] 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.

[0126] Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes in accordance with the programs. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 140 of the base station 10 shown in FIG. 14 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. Furthermore, for example, the control unit 240 of the terminal 20 shown in FIG. 15 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line.

[0127] The storage device 1002 is a computer-readable recording medium and may be configured, for example, by at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The storage device 1002 may also be called a register, a cache, a main memory, etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.

[0128] The secondary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. The above-mentioned storage medium may be, for example, a database, a server, or other suitable medium including at least one of the storage device 1002 and the secondary storage device 1003.

[0129] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, a transmission / reception antenna, an amplifier unit, a transmission / reception unit, a transmission path interface, etc. may be realized by the communication device 1004. The transmission / reception unit may be implemented as a transmission unit and a reception unit that are physically or logically separated.

[0130] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0131] Furthermore, each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0132] Furthermore, base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

[0133] (Supplementary explanation of the embodiment) Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; two or more items may be combined as needed, and items described in one item may apply to items described in another item (unless inconsistent). The boundaries between functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of the processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 have been described using functional block diagrams. However, such devices may be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

[0134] Furthermore, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0135] Each aspect / embodiment described in the present disclosure may be applied to at least one of systems using LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (New Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark), IEEE 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), or other appropriate systems, and next-generation systems extended based on these. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G, etc.) may also be applied.

[0136] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described herein may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order and are not limited to the particular order presented.

[0137] In this specification, a specific operation that is described as being performed by the base station 10 may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having the base station 10, it is clear that various operations performed for communication with the terminal 20 may be performed by at least one of the base station 10 and another network node other than the base station 10 (such as, but not limited to, an MME or an S-GW). Although the above example illustrates a case where there is one other network node other than the base station 10, the other network node may be a combination of multiple other network nodes (such as an MME and an S-GW).

[0138] 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.

[0139] Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

[0140] 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).

[0141] 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.

[0142] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0143] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0144] Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0145] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0146] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by an index.

[0147] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0148] In this disclosure, terms such as "base station (BS)," "radio base station," "base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0149] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0150] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0151] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0152] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile body, or the mobile body itself. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0153] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0154] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station may be configured to have the functions of the user terminal described above.

[0155] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0156] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0157] The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.

[0158] 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."

[0159] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0160] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0161] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0162] 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.

[0163] Numerology may be communication parameters that apply to at least one of transmission and reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0164] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may be a time unit based on numerology.

[0165] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0166] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0167] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0168] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units. Note that the definition of TTI is not limited to this.

[0169] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0170] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0171] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0172] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0173] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0174] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0175] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0176] 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.

[0177] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0178] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be set for the terminal 20 within one carrier.

[0179] At least one of the configured BWPs may be active, and the terminal 20 may not expect to transmit or receive a predetermined signal / channel outside the active BWP. Note that the terms "cell," "carrier," and the like in this disclosure may be read as "BWP."

[0180] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0181] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0182] 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."

[0183] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0184] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure. (Section 1) a receiving unit that receives data by SPS (Semi Persistent Scheduling); a control unit that postpones transmission of a first channel for transmitting feedback information for the data until an available uplink resource, and determines a resource for transmitting the first channel when the postponed transmission of the first channel overlaps in a time domain with a second channel that is another uplink channel; a transmitter configured to transmit the feedback information to a base station in the determined resource. (Section 2) The terminal described in claim 1, wherein the control unit executes a first process related to multiplexing the first channel and the second channel, and a second process of confirming whether the first channel and the second channel are allocated to valid uplink resources. (Section 3) 3. The terminal according to claim 2, wherein the control unit is capable of setting whether the first process or the second process is to be executed first. (Section 4) The terminal according to claim 3, wherein the control unit further postpones transmission of the first channel if, after performing the first processing and the second processing, it is unable to determine valid uplink resources for transmitting the first channel. (Section 5) The terminal according to claim 4, wherein the control unit further postpones transmission of the first channel if, after performing the first processing and the second processing, it is unable to determine valid uplink resources for transmitting the first channel and if the maximum value of the offset from data to feedback information transmission is not exceeded. (Section 6) a receiving procedure for receiving data by SPS (Semi-persistent scheduling); a control procedure for postponing transmission of a first channel for transmitting feedback information for the data until an available uplink resource is available, and determining a resource for transmitting the first channel when the postponed transmission of the first channel overlaps in a time domain with a second channel, which is another uplink channel; a transmission procedure of transmitting the feedback information to a base station in the determined resource,

[0185] This international patent application claims priority based on Japanese Patent Application No. 2020-187613, filed on November 10, 2020, the entire contents of which are incorporated herein by reference. [Explanation of symbols]

[0186] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 terminals 210 Transmitter 220 Receiving unit 230 Setting Section 240 Control Unit 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication equipment 1005 Input Device 1006 Output Device

Claims

1. a receiving unit that receives data by SPS (Semi Persistent Scheduling) from a base station; a control unit that determines a first resource for transmitting feedback information corresponding to the data; The control unit If the first resource overlaps with a downlink symbol, determine whether the second resource overlaps with a downlink symbol after resolving overlap between the feedback information and other UL channels in a second resource that is later in time than the first resource; The terminal further comprises a transmitter configured to transmit the feedback information to the base station in the second resource when the second resource does not overlap with a downlink symbol.

2. 2. The terminal according to claim 1, wherein the control unit determines a third resource that is later in the time domain than the second resource and satisfies a condition related to a maximum offset from reception of the data to transmission of the feedback information when the second resource overlaps with a downlink symbol.

3. A communication system having a terminal and a base station, The terminal a receiving unit that receives data by SPS (Semi Persistent Scheduling) from the base station; a control unit that determines a first resource for transmitting feedback information corresponding to the data; The control unit If the first resource overlaps with a downlink symbol, determine whether the second resource overlaps with a downlink symbol after resolving overlap between the feedback information and other UL channels in a second resource that is later in time than the first resource; a transmitter configured to transmit the feedback information to the base station in the second resource when the second resource does not overlap with a downlink symbol; The base station A transmitting unit that transmits data by the SPS to the terminal; a receiving unit that receives the feedback information from the terminal in the second resource.

4. a procedure for receiving data by SPS (Semi persistent scheduling) from a base station; determining a first resource for transmitting feedback information corresponding to the data; If the first resource overlaps with a downlink symbol, determining whether the second resource overlaps with a downlink symbol after resolving overlap between the feedback information and other UL channels in a second resource that is later in time than the first resource; and transmitting the feedback information to the base station in the second resource if the second resource does not overlap with a downlink symbol.

Images