Terminal, base station, wireless communication method, and wireless communication system

Abstract

This terminal comprises a receiving unit which receives a downstream control signal, and a control unit which, on the basis of the downstream control signal, controls repeat transmission of an upstream control signal and delaying transmission of the upstream control signal.

Description

Technical Field

[0001] The present disclosure relates to a terminal , base station, wireless communication method , and wireless communication system and is related thereto.

Background Art

[0002] In a Universal Mobile Telecommunication System (UMTS) network, Long Term Evolution (LTE) was standardized for the purpose of further high data rates, low latency, etc. Also, a successor system to LTE is being studied for the purpose of further wider bandwidth and higher speed from LTE. Successor systems to LTE include, for example, systems called LTE-Advanced (LTE-A), Future Radio Access (FRA), 5th generation mobile communication system (5G), 5G plus (5G+), Radio Access Technology (New-RAT), New Radio (NR), and the like.

[0003] For example, in NR, in order to improve communication quality, strengthening the function of feedback from the terminal to the base station is being studied (for example, Non-Patent Document 1).

[0004] Information fed back from the terminal to the base station is transmitted in the resources of the Physical Uplink Control Channel (PUCCH). Regarding the extension of the Ultra-Reliable and Low Latency Communications (URLLC) technology in Release 17 of 3GPP (hereinafter sometimes referred to as Rel.17 or Rel-17), a method for setting resources for transmitting an uplink control signal including information to be fed back is being studied. Also, in Rel.15-17 of 3GPP, it has been agreed to support repetition (repeated transmission) of the PUCCH.

Prior Art Documents

Non-Patent Literature

[0005]

Non-Patent Literature 1

Summary of the Invention

[0006] Regarding the operation of a terminal in a radio system capable of setting resources for transmitting an uplink control signal considering the repetition of the uplink control signal, there is room for consideration.

[0007] One aspect of the present disclosure is a terminal that operates appropriately in a radio system capable of setting resources for transmitting an uplink control signal considering the repetition of the uplink control signal , base station, wireless communication method, and wireless communication system and provides it.

Means for Solving the Problems

[0008] A terminal according to one aspect of the present disclosure includes a receiving unit that receives a downlink control signal, and a control unit that controls repeated transmission of an uplink control signal and postponement of transmission of the uplink control signal based on the downlink control signal.

[0009] A wireless communication method according to one aspect of the present disclosure is that a terminal receives a downlink control signal and controls repeated transmission of an uplink control signal and postponement of transmission of the uplink control signal based on the downlink control signal.

Brief Description of the Drawings

[0010]

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Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments according to one aspect of the present disclosure will be described with reference to the drawings.

[0012] (One Embodiment)

[0013] In NR, semi-persistent scheduling (SPS) of the downlink, which pre-sets the resources of the Physical Downlink Shared Channel (PDSCH) in the terminal 20 and performs activation / release using Downlink Control Information (DCI), is defined. With SPS, low-latency data reception is possible.

[0014] When an uplink (UL) slot is arranged after a plurality of consecutive downlink (DL) slots, the terminal may transmit an acknowledgement response (e.g., Hybrid Automatic Repeat request - Acknowledgement (HARQ-ACK)) corresponding to the reception of a plurality of data in the DL slot in the UL slot after the DL slot.

[0015] Note that hereinafter, the PDSCH based on SPS may be described as SPS PDSCH, and the acknowledgement response for the SPS PDSCH may be described as SPS HARQ-ACK.

[0016] In the present embodiment, a wireless communication system capable of operating by SPS, in which an SPS PDSCH is transmitted from a base station to a terminal and an uplink control signal (e.g., a signal of a Physical Uplink Control Channel (PUCCH)) including an SPS HARQ ACK is transmitted from the terminal to the base station, will be described as an example.

[0017] (System Configuration) FIG. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present disclosure. As shown in FIG. 1, the wireless communication system according to the embodiment of the present disclosure includes a base station 10 and a terminal 20. Although one base station 10 and one terminal 20 are shown in FIG. 1, this is an example, and there may be a plurality of each.

[0018] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of the wireless signal are defined in the time domain and the frequency domain. The time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. Also, the TTI (Transmission Time Interval) in the time domain may be a slot or a subframe.

[0019] The base station 10 is capable of performing carrier aggregation in which a plurality of cells (a plurality of CCs (Component Carriers)) are bundled to communicate with the terminal 20. In carrier aggregation, one PCell (Primary Cell) and one or more SCell (Secondary Cells) are used.

[0020] The base station 10 transmits synchronization signals and system information, etc. to the terminal 20. The synchronization signals are, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, by 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 in the DL and receives control signals or data from the terminal 20 in the UL. Here, what is transmitted on control channels such as PUCCH and PDCCH (Physical Downlink Control Channel) is called a control signal, and what is transmitted on shared channels such as PUSCH (Physical Uplink shared Channel) and PDSCH is called data, but such a naming method is just an example.

[0021] 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, and a communication module for M2M (Machine-to-Machine). As shown in FIG. 1, the terminal 20 receives control signals or data from the base station 10 in the DL and transmits control signals or data to the base station 10 in the UL, thereby using various communication services provided by the wireless communication system. Note that the terminal 20 may be called a UE, and the base station 10 may be called a gNB.

[0022] The terminal 20 is capable of performing carrier aggregation to communicate with the base station 10 by bundling a plurality of cells (a plurality of CCs (Component Carriers)). In carrier aggregation, one PCell (Primary Cell) and one or more SCell (Secondary Cells) are used. Also, a PUCCH-SCell having a PUCCH may be used.

[0023] FIG. 2 shows a configuration example of a wireless communication system when DC (Dual Connectivity) is executed. 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.

[0024] A cell group provided by the base station 10A which is an MN is called an MCG (Master Cell Group), and a cell group provided by the base station 10B which is an SN is called an SCG (Secondary Cell Group). Also, in DC, the MCG is composed of one PCell and one or more SCell, and the SCG is composed of one PSCell (Primary SCell) and one or more SCell.

[0025] The processing operations in the present embodiment may be executed with the system configuration shown in FIG. 1, or may be executed with the system configuration shown in FIG. 2, or may be executed with other system configurations.

[0026] (Basic operation example) Referring to FIG. 3, a basic operation example of the communication system in the embodiment of the present disclosure will be described.

[0027] In S101, the base station 10 transmits, by means of RRC (Radio Resource Control) signaling, the configuration information of downlink SPS, the configuration information of PUCCH resources, the configuration information of slot format, etc. to the terminal 20, and the terminal 20 receives these configuration information. Note that since this embodiment targets downlink SPS, hereinafter, "SPS" means downlink SPS.

[0028] The configuration information of the slot format is, for example, tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated. With this configuration information, it is set whether the TDD (Time Division Duplex) configuration in each symbol of each slot in one or more slots is any of DL, UL, and flexible. Hereinafter, this configuration information is referred to as semi-static TDD configuration information. Also, flexible may be described as F. The terminal 20 basically determines the DL / UL / F of each symbol of each slot according to the semi-static TDD configuration information.

[0029] Also, as the configuration information in S101, a plurality of candidates of the slot format may be notified to enable dynamic switching of the slot format. This configuration information is, for example, SlotFormatCombinationsPerCell. Since this information consists of the IDs of the slot format (SF), hereinafter, this is referred to as SFI configuration information.

[0030] In S102, the terminal 20 receives from the base station 10 a DCI that activates the SPS configuration, and in S103, it receives data using the PDSCH resources according to the SPS configuration. In S104, the terminal 20 transmits the SPS HARQ-ACK to the base station 10 using the PUCCH resources of the slot at the time position specified by the DCI (or the PUSCH resources if there is UL scheduling). Note that the SPS HARQ-ACK may sometimes be referred to as the HARQ-ACK. Also, the HARQ-ACK may be referred to as HARQ information, feedback information, etc.

[0031] The terminal 20 may also receive from the base station 10 a DCI that dynamically specifies the slot format in S102 or before or after it. This DCI is control information that specifies the ID of the slot format actually used among the IDs of a plurality of slot formats set by the SFI configuration information. When the terminal 20 is specified the slot format by this DCI, instead of the semi-static TDD configuration information, it determines the DL / UL / F of each symbol of each slot according to the slot format. This information of this DCI is called dynamic SFI specification information (or dynamic SFI, or SFI).

[0032] When SPS is configured, depending on the DL / UL setting of TDD in the slot at the specified time position (the setting by the semi-static TDD configuration information or the dynamic SFI specification information), it is conceivable that the symbol position where the PUCCH resources are configured overlaps with other symbols (for example, semi-static DL symbols), and the HARQ-ACK cannot be transmitted.

[0033] In 3GPP, in Release 17, technologies for schemes called URLLC and Industrial Internet of Things (IIoT) are being studied. In URLLC, enhancements to the terminal feedback function for Hybrid Automatic Repeat request - Acknowledgement (HARQ-ACK) are being considered. HARQ-ACK is an example of information regarding the confirmation response (e.g., acknowledgement) for the data received by the terminal. As an example of the enhancement to the overlap as described above, the deferral of the above-mentioned SPS HARQ-ACK (SPS HARQ-ACK deferring) is being considered.

[0034] <Deferral of SPS HARQ-ACK (SPS HARQ-ACK deferring)> In 3GPP, in Release 17, it was agreed to support the deferral of SPS HARQ-ACK. Also, in 3GPP, the following points were agreed upon regarding the deferral of SPS HARQ-ACK.

[0035] When the PUCCH using "SPS-PUCCH-AN-List-r16" or "n1PUCCH-AN" overlaps with a semi-static DL or SSB symbol, the SPS HARQ-ACK PUCCH may be deferred. Note that SSB is an abbreviation for SS / PBCH block, SS is an abbreviation for Synchronization Signal, PBCH is an abbreviation for Physical Broadcast Channel, and it may also be referred to as an information channel.

[0036] Note that "SPS-PUCCH-AN-List-r16" is included in the information (e.g., PUCCH-Config) for setting the parameters of the PUCCH resource for the terminal. "SPS-PUCCH-AN-List-r16" is an example of the information indicating the list of PUCCH resources for DL SPS HRQ-ACK. Also, "n1PUCCH-AN" is included in the information (e.g., SPS-Config) used for the setting of DL semi-persistent transmission. "n1PUCCH-AN" is an example of the information indicating the HARQ resource of PUCCH for DL SPS.

[0037] The deferral of SPS HARQ-ACK may be set for each SPS configuration. The HARQ-ACK of the SPS PDSCH setting for which deferral is possible may be deferred.

[0038] The maximum deferral limitation may be set for each SPS setting. For example, a condition may be provided that "K1_max_def = K1 + K_def" does not exceed the limitation (e.g., maximum deferral limitation). Note that K1 indicates the offset from the slot of the data (e.g., SPS PDSCH) to the slot of the acknowledgment response (e.g., SPS HARQ-ACK) corresponding to the data. K_def indicates the offset from the slot indicated by K1 to the slot of the HARQ-ACK to be deferred.

[0039] The slot in which the deferred SPS HARQ-ACK can be transmitted is referred to as the target slot or the target PUCCH slot.

[0040] For example, the target slot is the first available slot where the determined PUCCH resource does not overlap with an invalid symbol (e.g., a semi-static DL or SSB symbol). The determined PUCCH resource may correspond to, for example, the PUCCH resource used for transmitting a deferred SPS HARQ-ACK. Also, the first available slot may be the earliest slot in the time direction. Further, the invalid symbol may be a symbol different from a semi-static DL or SSB symbol.

[0041] The multiplexing of SPS HARQ-ACK and dynamic HARQ-ACK may be considered in determining the target slot.

[0042] After determining the target PUCCH slot, if the deferred SPS HARQ-ACK is not transmitted, the transmission of the deferred SPS HARQ-ACK bits may not be further deferred. In this case, the deferred SPS HARQ-ACK bits may be dropped.

[0043] FIG. 4 is a diagram showing an example of the deferral of SPS HARQ-ACK. The horizontal axis in FIG. 4 represents the time axis. In FIG. 4, six slots are exemplarily shown. Hereinafter, when describing a plurality of slots, they may be described as the first slot, the second slot, etc. in order from the older time side (the left side of the figure). Each of the six slots is marked with either "D" or "U". The slot marked with "D" indicates a DL slot, and the slot marked with "U" indicates a UL slot. The first slot includes SPS PDSCH#1 and SPS PDSCH#2, and the second slot includes SPS PDSCH#3.

[0044] Here, by way of example, it is described when the postponement of SPS HARQ-ACK is effective in the SPS settings of SPS PDSCH#1 and SPS PDSCH#3 and ineffective in the SPS setting of SPS PDSCH#2, and the SPS HARQ-ACK for each SPS PDSCH can be transmitted in the third slot. Note that the fact that the SPS HARQ-ACK can be transmitted in the third slot may correspond to the information indicating the transmission slot of the SPS HARQ-ACK instructing transmission in the third slot. In this case, in the third slot, since the SPS HARQ-ACK overlaps with the semi-static DL, the SPS HARQ-ACK PUCCH is postponed.

[0045] The slot (the third slot in FIG. 4) in which the SPS HARQ-ACK for the SPS PDSCH can be transmitted is defined by the parameter "K1". K1 indicates the offset from the data (e.g., SPS PDSCH) to the corresponding acknowledgment response (e.g., SPS HARQ-ACK). In the case of FIG. 4, since K1 = 2 is set for SPS PDSCH#1 and K1 = 1 is set for SPS PDSCH#2, the third slot is indicated.

[0046] In the example of FIG. 4, the fifth slot corresponds to the first available slot (target slot) that does not overlap with an invalid symbol (e.g., semi-static DL or SSB symbol). Therefore, the HARQ-ACK bits (postponed HARQ-ACK bits) for SPS PDSCH#1 and SPS PDSCH#3 for which the postponement of SPS HARQ-ACK is effective are transmitted in the target slot.

[0047] <Slot-based PUCCH repetition> In PUCCH formats 1 / 3 / 4 of Rel.15 / 16, slot based PUCCH repetition is supported. For example, the terminal repeats the transmission of PUCCH a predetermined number of times based on an instruction and / or setting from the base station.

[0048] FIG. 5 is a diagram showing an example of PUCCH repetition. The number of PUCCH repetitions may be determined based on information notified from the base station. The n-th repetition may also be called the n-th transmission occasion, etc. For example, the first transmission may be referred to as the first PUCCH repetition.

[0049] FIG. 6 is a diagram showing an example of a higher layer parameter indicating the number of PUCCH repetitions. The terminal may receive information indicating the number of repetitions by a higher layer parameter such as RRC, for example.

[0050] For example, as shown in FIG. 6, the terminal may receive information indicating the number of PUCCH repetitions by the number of slots information element nrofSlots. The number of slots information element nrofSlots may be set for each PUCCH resource. The same symbol assignment may be applied among n consecutive slots.

[0051] For PUCCH formats 1, 3, or 4, the terminal can set the number of PUCCH repetitions N_PUCCH^repeat (sometimes denoted as N PUCCH repeat as described) for PUCCH repetition by each number of slots information element nrofSlots.

[0052] When N_PUCCH^repeat>1, the terminal follows the following Provisions 1-1 to 1-3.

[0053] [Provision 1-1] The terminal repeats PUCCH transmission with UCI (Uplink Control Information) over N_PUCCH^repeat slots.

[0054] [Provision 1-2] Each PUCCH transmission in the N_PUCCH^repeat slots has the same number of consecutive symbols. The number of symbols is provided by the number-of-symbols information element nrofsymbols in the PUCCH format 1 information element PUCCH-format1, or the number-of-symbols information element nrofsymbols in the PUCCH format 3 information element PUCCH-format3, or the number-of-symbols information element nrofsymbols in the PUCCH format 4 information element PUCCH-format4.

[0055] [Provision 1-3] Each PUCCH transmission in the N_PUCCH^repeat slots has the same first symbol (starting symbol index). The first symbol is provided by the starting-symbol-index information element startingSymbolIndex in the PUCCH format 1 information element PUCCH-format1, or the starting-symbol-index information element startingSymbolIndex in the PUCCH format 3 information element PUCCH-format3, or the starting-symbol-index information element startingSymbolIndex in the PUCCH format 4 information element PUCCH-format4.

[0056] <PUCCH Repetition Postponing> In 3GPP Release 16 (hereinafter sometimes referred to as Rel.16 or Rel-16), for example, in TS 38.213 section 9.2.6, collisions for PUCCH with more than 1 repetition are defined. This collision may be referred to as "direction collision". Note that "collision" may be read as "duplication" or "overlap".

[0057] For example, when the terminal determines that the number of symbols available for PUCCH transmission in a certain slot is smaller than the value given by "nrofSymbols" of the corresponding PUCCH format for the PUCCH transmission in that slot, the terminal does not have to transmit PUCCH in that slot. In other words, in this case, the terminal determines that there is a collision for the PUCCH of the PUCCH repetition in a certain slot.

[0058] And for the operation of delaying PUCCH repetition, there are the following regulations.

[0059] When the PUCCH repetition collides with the SSB symbol or collides with the symbol indicated as DL, PUCCH repeat the PUCCH repetition in the case of N>1 may be postponed until the next available slot. Note that the postponed PUCCH repetition may include the first PUCCH repetition. Also, the symbol indicated as DL may be, for example, the symbol indicated as DL by "tdd-UL-DL-ConfigurationCommon" or "tdd-UL-DL-ConfigurationDedicated". Note that "tdd-UL-DL-ConfigurationCommon" or "tdd-UL-DL-ConfigurationDedicated" is the setting information of the slot format and may be notified (configured) by upper layer signaling (for example, RRC signaling).

[0060] When the PUCCH is triggered by DCI, the postponement of the PUCCH repetition for the first repetition of the above case may or may not be supported.

[0061] FIG. 7 is a diagram showing an example of the postponement of PUCCH repetition. Ten slots are shown in FIG. 7. Similar to FIG. 4, in FIG. 7, "D" in each slot indicates a DL slot, and "U" indicates a UL slot.

[0062] The first slot in FIG. 7 contains SPS PDSCH#1, and the second slot contains SPS PDSCH#2.

[0063] Here, by way of example, when N_rep = 4 and the SPS HARQ-ACK for each SPS PDSCH can be transmitted by repetition starting from the third slot, for example, when the third slot is specified by K1, this case will be described. In this case, in the third slot, the SPS HARQ-ACK overlaps with the semi-static DL. Therefore, the PUCCH repetition for transmitting the SPS HARQ-ACK is postponed.

[0064] In the case of FIG. 7, the PUCCH repetition is transmitted not in the third slot but in the UL slots after the fourth slot. For example, in the fourth slot, the first postponed PUCCH repetition ("postponed rep#1" in FIG. 4) is transmitted, and in the fifth, eighth, and ninth slots, the second, third, and fourth postponed PUCCH repetitions ("postponed rep#2", "postponed rep#3", and "postponed rep#4" in FIG. 4), respectively, are transmitted.

[0065] <Sub-slot based PUCCH repetition> In Rel.17, it is agreed to support sub-slot based PUCCH repetition.

[0066] FIG. 8 is a diagram showing an example of sub-slot based PUCCH repetition. In FIG. 8, an example of sub-slot based PUCCH repetition is shown when the sub-slot length is set to 7 symbols (e.g., subslotLengthForPUCCH = 7) and the number of repetitions is set to 4 (e.g., nrofSlots / nrofsubslots = 4). The terminal is controlled to perform PUCCH transmission in each sub-slot (7 symbols), for example.

[0067] In Rel.17, it is agreed to apply the slot-based PUCCH procedure of Rel.16 to sub-slot based PUCCH and support sub-slot based PUCCH repetition in HARQ-ACK. That is, in Rel.17, the slot-based PUCCH of Rel.16 is adopted by appropriately replacing it with "sub-slot" without optimization except when necessary. Note that the dynamic repetition indicator is also supported in the sub-slot based PUCCH of Rel.17.

[0068] Also, in sub-slot based PUCCH repetition, it is agreed to support PUCCH repetition in PUCCH formats 0 and 2.

[0069] <Analysis> As described above, in Rel-16, N PUCCH repeatFor PUCCH with a value greater than 1, PUCCH repetition postponing is supported. Also, in Rel-17, the introduction of SPS HARQ ACK deferring is being considered. There is room for consideration regarding the combined operation of PUCCH repetition postponing and SPS HARQ ACK deferring, and / or the interaction between PUCCH repetition postponing and SPS HARQ ACK deferring.

[0070] For example, in Case 1 and Case 2 below, the combined operation of PUCCH repetition postponing and SPS HARQ ACK deferring, and / or the interaction between PUCCH repetition postponing and SPS HARQ ACK deferring are considered.

[0071] Case 1: Case 1 is a HARQ-ACK PUCCH determined in an initial slot that has initial SPS HARQ-ACK bits and no deferred SPS HARQ-ACK bit(s), where N PUCCH repeat > 1 is determined for the PUCCH.

[0072] Case 1 includes the following Case 1-1 and Case 1-2.

[0073] Case 1-1: A case where the PUCCH resource (e.g., the first PUCCH repetition) in the initial slot overlaps with a semi-static DL or SSB symbol.

[0074] Case 1-2: The case where the PUCCH resource in the initial slot (e.g., the first PUCCH repetition) does not overlap with the semi-static DL or SSB symbol, and one or more of the PUCCH repetitions other than the first PUCCH repetition overlap with the semi-static DL or SSB symbol. The PUCCH repetitions other than the first PUCCH repetition are, for example, the PUCCH repetitions after the first PUCCH repetition.

[0075] Case 2: In the target slot, it is a HARQ-ACK PUCCH having postponed SPS HARQ-ACK bits, and in the target slot, N PUCCH repeat > 1 is determined for the PUCCH.

[0076] The above Case 1-1, Case 1-2, and Case 2 will be described with reference to the drawings.

[0077] FIG. 9 is a diagram showing the cases exemplified in the present embodiment. In FIG. 9, three cases of Case 1-1, Case 1-2, and Case 2 are shown. In each case, 10 slots are shown as in FIG. 7. Similar to FIG. 4, in FIG. 9, "D" in each slot indicates a DL slot, and "U" indicates a UL slot.

[0078] Also, in each case, the first slot includes SPS PDSCH#1, and the second slot includes SPS PDSCH#2.

[0079] Similar to FIG. 7, by way of example, the case where N_rep = 4 and the SPS HARQ-ACK for each SPS PDSCH can be transmitted by repetition from the third slot will be described.

[0080] In case 1-1 of FIG. 9, the PUCCH resource (e.g., the first PUCCH repetition) in the third slot, which is the initial slot, overlaps with the semi-static DL.

[0081] In case 1-2 of FIG. 9, the PUCCH resource (e.g., the first PUCCH repetition) in the third slot, which is the initial slot, does not overlap with the semi-static DL or the SSB symbol, and the fourth PUCCH repetition in the sixth slot overlaps with the semi-static DL.

[0082] In case 2 of FIG. 9, since the SPS HARQ-ACK for SPS PDSCH#1 and SPS PDSCH#2 overlaps with the semi-static DL in the third slot, the SPS HARQ-ACK PUCCH is postponed. Then, in the fourth slot, which is the target slot, it is the HARQ-ACK PUCCH with the postponed SPS HARQ-ACK bits, and in the fourth slot, N PUCCH repeat >1 is determined for the PUCCH.

[0083] For example, the following considerations exist for the above cases 1-1, 1-2, and 2.

[0084] Regarding case 1-1, there is room for consideration as to whether the terminal applies the method of delaying the PUCCH repetition according to the Rel-16 specification or delays the SPS HARQ-ACK bits according to the SPS HARQ-ACK delay specification of Rel-17.

[0085] Regarding case 1-2, there is room for consideration as to whether to change the operation of the PUCCH repetition according to the Rel-16 specification in the PUCCH repetition that collides with the invalid symbol (e.g., the semi-static DL or the SSB symbol).

[0086] For Case 2, there is room for consideration as to whether the provisions regarding the determination of PUCCH repetitions according to Rel-16 apply to the PUCCH in the target slot with the postponed SPS HARQ-ACK bits, or whether another behavior is specified.

[0087] All of the above considerations are related to the combined operation of the deferral of PUCCH repetitions and the postponement of SPS HARQ-ACK, and / or the interaction between the deferral of PUCCH repetitions and the postponement of SPS HARQ ACK. For these considerations, in this embodiment, the following three proposals are presented.

[0088] (Proposal 0) In Proposal 0, it is not assumed that PUCCH repetition and the postponement of SPS HARQ-ACK are both made effective at the same time. Alternatively, it is not assumed that PUCCH repetition and the postponement of SPS HARQ-ACK are both set at the same time. For example, the terminal and / or the base station do not assume that PUCCH repetition and the postponement of SPS HARQ-ACK are both made effective at the same time. Alternatively, the terminal and / or the base station do not assume that PUCCH repetition and the postponement of SPS HARQ-ACK are both set at the same time. Here, making effective corresponds to "enable". Note that in Proposal 0, although it is assumed that PUCCH repetition and the postponement of SPS HARQ-ACK are both set at the same time, it is not necessary to assume that they are both made effective at the same time.

[0089] Note that instead of Proposal 0, it is not necessary to assume that the deferral of PUCCH repetitions and the postponement of SPS HARQ-ACK are both made effective at the same time. Alternatively, it is not necessary to assume that the deferral of PUCCH repetitions and the postponement of SPS HARQ-ACK are both set at the same time.

[0090] Also, it may be assumed that PUCCH repetition and SPS HARQ-ACK postponement are both enabled simultaneously. Alternatively, it may be assumed that PUCCH repetition and SPS HARQ-ACK postponement are both configured simultaneously. The terminal and / or the base station may assume that PUCCH repetition and SPS HARQ-ACK postponement are both enabled simultaneously. Alternatively, the terminal and / or the base station may assume that PUCCH repetition and SPS HARQ-ACK postponement are both configured simultaneously. In this case, for example, for the above Case 1 and Case 2, the following two proposals can be considered.

[0091] (Proposal 1) In Proposal 1, in the above Case 1 (Case 1-1 and Case 1-2), it is assumed that PUCCH repetition and SPS HARQ-ACK postponement are both enabled simultaneously. Alternatively, it is assumed that PUCCH repetition and SPS HARQ-ACK postponement are both configured simultaneously.

[0092] (Proposal 2) In Proposal 2, in the above Case 2, it is assumed that PUCCH repetition and SPS HARQ-ACK postponement are both enabled simultaneously. Alternatively, it is assumed that PUCCH repetition and SPS HARQ-ACK postponement are both configured simultaneously.

[0093] Note that in Proposal 1 and Proposal 2, it may be assumed that PUCCH repetition deferral and SPS HARQ-ACK postponement are both enabled simultaneously. Alternatively, it may be assumed that PUCCH repetition deferral and SPS HARQ-ACK postponement are both configured simultaneously.

[0094] Hereinafter, the variations (options (which may be abbreviated as "Opt.") and / or alternations (which may be abbreviated as "Alt.")) of each proposal will be described.

[0095] (Variation of Proposal 0) As described above, in Proposal 0, it is not assumed that PUCCH repetition and SPS HARQ-ACK postponement are both enabled or set at the same time. Proposal 0 includes the following Proposal 0-1 and / or Proposal 0-2.

[0096] (Proposal 0-1) In Proposal 0-1, the terminal does not assume that a PUCCH resource with N PUCCH repeat >1 is selected. In other words, in any of the following Alt.1 to Alt.5 cases, the terminal does not assume that PUCCH repetition is enabled. Note that any of the following Alt.1 to Alt.5 cases may correspond to the case where SPS HARQ-ACK postponement is enabled (or set), the case where SPS HARQ-ACK postponement can be enabled, and the case where SPS HARQ-ACK postponement is assumed to be enabled (or assumed to be set).

[0097] Alt.1: The PUCCH includes the SPS HARQ-ACK of the SPS setting with enabled postponement. In this case, the PUCCH does not include a dynamic HARQ-ACK and does not include other SPS HARQ-ACKs of SPS settings with disabled postponement. Also, in this case, the PUCCH may include only the SPS HARQ-ACK of the SPS setting with enabled postponement.

[0098] Alternative 2: When the PUCCH includes SPS HARQ-ACK, the postponement of SPS HARQ-ACK is valid for any SPS configuration, and at least one SPS HARQ-ACK bit corresponds to the SPS configuration for which the postponement is valid. In this case, the PUCCH does not include dynamic HARQ-ACK. Also, in this case, whether other SPS HARQ-ACKs of SPS configurations for which the postponement is not valid exist in the PUCCH may not matter (may not depend). For example, the PUCCH may include only SPS HARQ-ACK.

[0099] Alternative 3: When the PUCCH includes SPS HARQ-ACK, the postponement of SPS HARQ-ACK is valid for any SPS configuration. In this case, the PUCCH does not include dynamic HARQ-ACK. Also, in this case, whether the corresponding SPS configuration in the HARQ-ACK PUCCH enables the postponement may not matter (may not depend). For example, the PUCCH may include only SPS HARQ-ACK.

[0100] Alternative 4: The PUCCH includes any SPS HARQ-ACK of SPS configurations for which the postponement is valid. In this case, whether there is any dynamic HARQ-ACK may not matter. Also, in this case, whether there are other SPS HARQ-ACKs of SPS configurations for which the postponement is not valid may not matter.

[0101] Alternative 5: The PUCCH includes any SPS HARQ-ACK, and the postponement of SPS HARQ-ACK is valid for any SPS configuration. In this case, whether the corresponding SPS configuration in the HARQ-ACK PUCCH enables the postponement may not matter. Also, in this case, whether there is a dynamic HARQ-ACK may not matter. Also, in this case, whether the SPS HARQ-ACK bit belongs to an SPS configuration for which the postponement is valid may not matter.

[0102] (Proposal 0-2) In Proposal 0-1, when there is any SPS configuration for which the postponement is valid, the terminal does not assume that an SPS HARQ-ACK PUCCH resource with N PUCCH repeat >1 is set in "PUCCH-Config". For example, the terminal does not assume that the priority corresponding to the SPS HARQ-ACK bit is set in "PUCCH-Config". In other words, when there is any SPS configuration for which the postponement is valid, the terminal does not assume that PUCCH repetition is set.

[0103] According to Proposal 0 (Proposal 0-1 and Proposal 0-2) described above, since the terminal can selectively control PUCCH transmission between PUCCH repetition and postponement of SPS HARQ ACK, it is possible to provide a terminal that operates appropriately in a radio system capable of setting a resource for transmitting PUCCH considering PUCCH repetition.

[0104] (Variation of Proposal 1) In Proposal 1, in Case 1, it is assumed that PUCCH repetition and postponement of SPS HARQ-ACK are both enabled at the same time. Alternatively, it is assumed that PUCCH repetition and postponement of SPS HARQ-ACK are both set at the same time.

[0105] Note that below, Proposal 1 for Case 1-1 will be described.

[0106] (Proposal 1 Case 1-1) Case 1 is the HARQ-ACK PUCCH determined in the initial slot that has the above-mentioned initial SPS HARQ-ACK bit and does not have deferred SPS HARQ-ACK bit(s), and N PUCCH repeat>1 is a case determined for the PUCCH. And Case 1-1 is a case in Case 1 where the PUCCH resource (e.g., the first PUCCH repetition) in the initial slot overlaps with a semi-static DL or SSB symbol.

[0107] For Proposal 1 for Case 1-1, any of the following three options applies.

[0108] Option 1: Follow the Rel-16 rules. For example, the terminal follows the Rel-16 operation. Note that in Option 1, the Rel-17 SPS HARQ-ACK postponement does not need to be considered.

[0109] Note that in Option 1, the terminal performs an operation of deferring each PUCCH repetition that collides with an invalid symbol until the next available slot. The PUCCH repetitions to be deferred may include the first PUCCH repetition.

[0110] Option 2: The rules for Rel-17 SPS HARQ-ACK postponement take precedence. For example, the rules for Rel-17 SPS HARQ-ACK postponement are applied with precedence over the Rel-16 rules.

[0111] In Option 2, examples of the conditions for which SPS HARQ-ACK postponement is applied include the following.

[0112] The first condition (hereinafter referred to as the condition of Option 2-A) is that in the initial slot, when only SPS HARQ-ACK exists in the HARQ-ACK PUCCH (for example, when dynamic HARQ-ACK is not multiplexed), and any SPS HARQ-ACK in the HARQ-ACK PUCCH corresponds to an SPS PDSCH configuration with valid postponement. Note that the SPS PDSCH configuration may be read as the SPS configuration.

[0113] The second condition (the condition of Option 2-B) is that in the initial slot, when only SPS HARQ-ACK exists in the HARQ-ACK PUCCH (for example, when dynamic HARQ-ACK is not multiplexed), and all SPS HARQ-ACKs in the HARQ-ACK PUCCH correspond to an SPS PDSCH configuration with valid postponement.

[0114] Note that in Option 2, the terminal performs an operation of postponing the transmission of, for example, the SPS HARQ-ACK bits to be postponed until the target PUCCH slot.

[0115] Note that when the conditions for applying the postponement of SPS HARQ-ACK, such as the condition of Option 2-A and the condition of Option 2-B, are not met, the PUCCH may not be transmitted. In other words, in this case, the PUCCH repetition may not be transmitted.

[0116] Alternatively, when the conditions for applying the postponement of SPS HARQ-ACK, such as the condition of Option 2-A and the condition of Option 2-B, are not met, the terminal may follow the Rel-16 rules. In this case, the postponement of PUCCH repetition is applied, and the PUCCH repetition may be postponed.

[0117] The above Option 1 and Option 2 will be described with reference to the drawings. FIG. 10 is a diagram showing an example of Proposal 1 in Case 1-1. FIG. 10 shows an example of Option 1 and an example where Option 2-A of Option 2 is applied. Six slots are shown in each example. "D" in each slot indicates that it is a DL slot, and "U" indicates that it is a UL slot. Also, the first slot in each example includes SPS PDSCH#1 and SPS PDSCH#2, and the second slot includes SPS PDSCH#3.

[0118] Here, by way of example, a case will be described where SPS HARQ-ACK postponement is effective in the SPS settings of SPS PDSCH#1 and SPS PDSCH#3, and ineffective in the SPS setting of SPS PDSCH#2, and the SPS HARQ-ACK for each SPS PDSCH can be transmitted in the third slot. In this case, in the third slot, the SPS HARQ-ACK overlaps with semi-static DL.

[0119] In the example of Option 1 in FIG. 10, the PUCCH resources determined for SPS PDSCH#1, SPS PDSCH#2, and SPS PDSCH#3 are N_rep = 2. As described above, in Option 1, according to the Rel-16 rules, for example, since the terminal follows the Rel-16 operation, it performs the operation of delaying the PUCCH repetition. In the example of Option 1 in FIG. 10, the first PUCCH repetition is postponed to the fifth slot, and in the fifth slot, the first PUCCH repetition (in FIG. 10, "postponed rep#1") is transmitted. Then, in the sixth slot, the second PUCCH repetition (in FIG. 10, "postponed rep#2") is transmitted. Note that the first PUCCH repetition and the second PUCCH repetition may be repetitions for HARQ-ACK for SPS PDSCH#1, SPS PDSCH#2, and SPS PDSCH#3.

[0120] In the example of Option 2 in Figure 10, the PUCCH resources determined for SPS PDSCH#1, SPS PDSCH#2, and SPS PDSCH#3 have N_rep = 2. As described above, in Option 2, the Rel-17 SPS HARQ-ACK postponement rules are prioritized. Also, as an example of the application conditions, the conditions for Option 2-A are that in the initial slot, only the SPS HARQ-ACK exists in the HARQ-ACK PUCCH (for example, when dynamic HARQ-ACKs are not multiplexed), and any SPS HARQ-ACK in the HARQ-ACK PUCCH corresponds to an SPS PDSCH configuration for which postponement is valid.

[0121] In the example of Option 2 in Figure 10, in the third slot, which is the initial slot, only the SPS HARQ-ACK (the HARQ-ACK for SPS PDSCH#1, SPS PDSCH#2, and SPS PDSCH#3) exists in the HARQ-ACK PUCCH. Also, the HARQ-ACKs for SPS PDSCH#1 and SPS PDSCH#3 in the HARQ-ACK PUCCH correspond to SPS PDSCH configurations for which postponement is valid. That is, in the example of Option 2 in Figure 10, since the conditions for Option 2-A are met, the SPS HARQ-ACK postponement rules are applied. Then, in the fifth slot, which is the target slot, the postponed SPS HARQ-ACK is transmitted. Here, the HARQ-ACK to be transmitted may be the HARQ-ACK corresponding to an SPS PDSCH configuration for which postponement is valid (in the example of Figure 10, the HARQ-ACKs for SPS PDSCH#1 and SPS PDSCH#3).

[0122] Note that in the example of Option 2 in Figure 10, for the PUCCH resources in the fifth slot, N_rep = 1 is set.

[0123] In addition to Options 1 and 2 described above, in Proposal 1 for Case 1-1, the following Option 3 may be applied.

[0124] Option 3: The rule of postponing Rel-16 PUCCH repetition is applied and integrated with the limitation regarding the postponement of Rel-17 SPS HARQ-ACK.

[0125] For example, for the postponing restriction of PUCCH repetition according to the Rel-16 rule, the maximum deferral limitation set for each SPS configuration may be used. For example, the maximum deferral limitation may be expressed as K1_eff_max = K1 + K_max_def. Note that K1_eff_max may be expressed as "K1" eff_max ".

[0126] In the application of Option 3, exemplary explanations will be given for four points.

[0127] Point 1: Definition of postponing restriction For example, the postponing restriction is defined by the slot offset from the postponed repetition to the SPS PDSCH slot. In other words, the postponing restriction is defined by the interval (or distance) between the slot containing the postponed repetition and the SPS PDSCH slot. This interval may be expressed, for example, by the number of slots. Hereinafter, this offset is denoted as K1_rep. Note that K1_rep may be expressed as "K1" rep ".

[0128] For example, the following restrictions may be applied to K1_rep.

[0129] Alt-A: K1_rep?K1_eff_max Here, K1_eff_max indicates the maximum extension limit. For example, K1_eff_max may be set for each SPS setting according to Rel-17. Note that for SPS settings where extension is not valid, the maximum extension limit may be K1_eff_max = K1. Also, Alt-A may be such that K1_rep < K1_eff_max.

[0130] Alt-B: K1_rep?K1_eff_max+N_rep Here, K1_eff_max indicates the maximum extension limit. For example, K1_eff_max may be set for each SPS configuration according to Rel-17. Note that for SPS settings where extension is not valid, the maximum extension limit may be K1_eff_max = K1. Also, Alt-B may be such that K1_rep < K1_eff_max+N_rep.

[0131] Also, N_rep represents the number of PUCCH repetitions. The number of PUCCH repetitions represented by N_rep may be the number of possible PUCCH repetitions.

[0132] Note that N_rep may be the coefficient of PUCCH repetition determined for the PUCCH resource in the initial slot (e.g., N PUCCH repeat )). Hereinafter, this setting may be described as Alt-B1.

[0133] Alternatively, N_rep may be the maximum value of the possible PUCCH repetition coefficients set for the PUCCH resource in "PUCCH-Config". Hereinafter, this setting may be described as Alt-B2.

[0134] Note that N_rep may be the coefficient of PUCCH repetition determined for PUCCH resources in slots different from the initial slot. Alternatively, N_rep may be the minimum value, the average value, or the median value of the possible coefficients of PUCCH repetition set for the PUCCH resource in "PUCCH-Config". Alternatively, N_rep may be a coefficient different from the coefficient of PUCCH repetition determined for the PUCCH resource.

[0135] Point 2: Conditions for deferral restrictions For PUCCH repetition (each of the first PUCCH repetition or PUCCH repetitions including the first PUCCH repetition), it may be determined that the deferral restriction is satisfied in any of the following Opt.A or Opt.B cases.

[0136] Opt.A: For all SPS PDSCHs corresponding to HARQ-ACK PUCCH, the restriction of K1_rep is satisfied. In other words, in this case, there is no SPS PDSCH for which the restriction of K1_rep is not satisfied.

[0137] Opt.B: For at least one SPS PDSCH corresponding to HARQ-ACK PUCCH, the restriction of K1_rep is satisfied. In other words, in this case, even if there is an SPS PDSCH for which the restriction of K1_rep is not satisfied, as long as the restriction of K1_rep is satisfied for at least one SPS PDSCH.

[0138] Point 3: Targets for confirmation / application of deferral restrictions Regarding the targets for confirmation / application of whether the deferral restriction is satisfied, there are the following variations of Alt.1 and Alt.2.

[0139] Alt.1: In the first postponed PUCCH repetition, the postponement restriction is verified and / or applied. In other words, in PUCCH repetitions other than the first postponed PUCCH repetition, the postponement restriction need not be verified and / or applied.

[0140] Alt.2: In each postponed PUCCH repetition, the postponement restriction is verified and / or applied.

[0141] Here, Option 3 of Proposal 1 in Case 1-1 above will be described with reference to the drawings. FIG. 11 is a diagram showing a first example of Proposal 1 in Case 1-1. Four variations are illustrated in FIG. 11. In each variation, 10 slots are shown. Similar to FIG. 4, in FIG. 11, "D" in each slot indicates a DL slot, and "U" indicates a UL slot.

[0142] In each variation, the first slot contains SPS PDSCH#1, and the second slot contains SPS PDSCH#2. Exemplarily, for SPS PDSCH#1, K1 = 2 and K1_eff_max = 6 are set, and for SPS PDSCH#2, K1 = 1 and K1_eff_max = 8 are set.

[0143] Since K1 = 2 for SPS PDSCH#1 and K1 = 1 for SPS PDSCH#2, the case where SPS HARQ-ACK for each SPS PDSCH can be transmitted from the third slot will be described. Note that for the PUCCH that can be transmitted from the third slot, N_rep = 4.

[0144] Variation 1 shows an example that follows the rule of delaying Rel-16 as a comparative example for Option 3. In Variation 1, in the third slot, the SPS HARQ-ACK overlaps with the semi-static DL. Therefore, the PUCCH repetition for transmitting the SPS HARQ-ACK is postponed.

[0145] In the case of Variation 1 in Figure 11, the PUCCH repetition is transmitted not in the third slot but in the UL slots after the fourth slot. For example, in the fourth slot, the first postponed PUCCH repetition ("postponed rep#1" in Figure 4) is transmitted, and in the fifth, eighth, and ninth slots, the second, third, and fourth postponed PUCCH repetitions ("postponed rep#2", "postponed rep#3", and "postponed rep#4" in Figure 4) are transmitted respectively.

[0146] As described above, K1_rep is defined by the slot offset from the postponed repetition to the SPS PDSCH slot. In Variation 1, for SPS PDSCH#1 corresponding to postponed rep#1, K1_rep = 3, and for SPS PDSCH#2 corresponding to postponed rep#1, K1_rep = 4. For postponed rep#2, postponed rep#3, and postponed rep#4, similar to postponed rep#1, the values of K1_rep are defined for each of SPS PDSCH#1 and SPS PDSCH#2 as shown in Figure 11.

[0147] Variations 2 to 4 of Figure 11 are examples integrated with the postponed rules of Rel-16 and the limitations regarding the HARQ-ACK postponement of SPS in Rel-17. Note that, similar to Variation 1, PUCCH repetitions are postponed for Variations 2 to 4. For each slot of the PUCCH repetitions, it is the same as that of Variation 1.

[0148] Variation 2 of Figure 11 is an example where Alt.1 of the above Point 3 is applied. In Alt.1 of Point 3, the postponement restriction is confirmed and / or applied in the first postponed PUCCH repetition.

[0149] In Variation 2 of Figure 11, it is confirmed whether the postponement restriction is met for "postponed rep#1", which is the first postponed PUCCH repetition. In other words, in Variation 2 of Figure 11, it is not necessary to confirm whether the postponement restriction is met for "postponed rep#2" to "postponed rep#4" other than "postponed rep#1", which is the first postponed PUCCH repetition. In the case of Variation 2 of Figure 11, since the postponement restriction is met for "postponed rep#1", "postponed rep#1" to "postponed rep#4" are transmitted.

[0150] Variation 3 of FIG. 11 is an example in which Alt.2 of Point 3 above, Alt.A of Point 1, and Opt.A of Point 2 are applied. In Alt.2 of Point 3, for each of the postponed PUCCH repetitions (in the case of FIG. 11, each of "postponed rep#1" to "postponed rep#4"), the postponement restriction is confirmed. In Opt.A of Point 2, for all SPS PDSCHs corresponding to HARQ-ACK PUCCH, when the restriction of K1_rep is satisfied, it is determined that the postponement restriction is satisfied. In Alt.A of Point 1, the restriction of K1_rep is "K1_rep?K1_eff_max". In other words, in Variation 3 of FIG. 11, the postponement restriction is confirmed for each of "postponed rep#1" to "postponed rep#4". And when both K1_rep for SPS PDSCH#1 corresponding to "postponed rep" and K1_rep for SPS PDSCH#2 satisfy "K1_rep?K1_eff_max", it is determined that the postponement restriction is satisfied.

[0151] In Variation 3 of Figure 11, for SPS PDSCH#1 corresponding to postponed rep#1, K1_rep for SPS PDSCH#1 is K1_rep = 3, and K1_eff_max for SPS PDSCH#1 is K1_eff_max = 6. Therefore, "K1_rep? K1_eff_max" is satisfied. Also, for SPS PDSCH#2 corresponding to postponed rep#1, K1_rep for SPS PDSCH#2 is K1_rep = 4, and K1_eff_max for SPS PDSCH#2 is K1_eff_max = 8. Therefore, "K1_rep? K1_eff_max" is satisfied. Thus, both SPS PDSCH#1 and SPS PDSCH#2 corresponding to postponed rep#1 satisfy "K1_rep? K1_eff_max" and therefore satisfy the deferral limit. In this case, in postponed rep#1, SPS HARQ-ACK for SPS PDSCH#1 and SPS PDSCH#2 may be transmitted. Also, in postponed rep#2, similar to postponed rep#1, both SPS PDSCH#1 and SPS PDSCH#2 satisfy the deferral limit.

[0152] In Variation 3 of FIG. 11, for SPS PDSCH#1 corresponding to postponed rep#3, K1_rep for SPS PDSCH#1 is K1_rep = 7, and K1_eff_max for SPS PDSCH#1 is K1_eff_max = 6. Therefore, "K1_rep? K1_eff_max" is not satisfied. Also, for SPS PDSCH#2 corresponding to postponed rep#3, K1_rep for SPS PDSCH#2 is K1_rep = 6, and K1_eff_max for SPS PDSCH#2 is K1_eff_max = 8. Therefore, "K1_rep? K1_eff_max" is satisfied. Thus, since SPS PDSCH#1 corresponding to postponed rep#3 does not satisfy "K1_rep? K1_eff_max", it does not satisfy the deferral limit. In this case, in postponed rep#3, the SPS HARQ-ACK for SPS PDSCH#1 is not transmitted (dropped). Also, in this case, in postponed rep#3, the SPS HARQ-ACK for SPS PDSCH#2 may or may not be transmitted. Also, in postponed rep#4, similar to postponed rep#3, SPS PDSCH#1 does not satisfy the deferral limit, and SPS PDSCH#2 satisfies the deferral limit.

[0153] Variation 4 is an example in which Alt.2 of Point 3, Alt.A of Point 1, and Opt.B of Point 2 are applied.

[0154] Variation 4 of FIG. 11 is an example where Alt.2 of Point 3 above, Alt.A of Point 1, and Opt.B of Point 2 are applied. In Alt.2 of Point 3, for each of the postponed PUCCH repetitions (in the case of FIG. 11, each of "postponed rep#1" to "postponed rep#4"), the postponement restriction is confirmed. In Opt.B of Point 2, for at least one SPS PDSCH corresponding to HARQ-ACK PUCCH, when the restriction of K1_rep is satisfied, it is determined that the postponement restriction is satisfied. In Alt.A of Point 1, the restriction of K1_rep is "K1_rep?K1_eff_max". In other words, in Variation 4 of FIG. 11, the postponement restriction is confirmed for each of "postponed rep#1" to "postponed rep#4". And when at least one of K1_rep for SPS PDSCH#1 corresponding to "postponed rep" and K1_rep for SPS PDSCH#2 satisfies "K1_rep?K1_eff_max", it is determined that the postponement restriction is satisfied.

[0155] In Variation 4 of FIG. 11, similar to the example shown in Variation 3, both SPS PDSCH#1 and SPS PDSCH#2 corresponding to postponed rep#1 satisfy "K1_rep?K1_eff_max", so the postponement restriction is satisfied. In this case, in postponed rep#1, SPS HARQ-ACK for SPS PDSCH#1 and SPS PDSCH#2 may be transmitted. Also, in postponed rep#2, similar to postponed rep#1, both SPS PDSCH#1 and SPS PDSCH#2 satisfy "K1_rep?K1_eff_max", so the postponement restriction is satisfied.

[0156] Also, in Variation 4 of FIG. 11, similar to the example shown in Variation 3, SPS PDSCH#1 corresponding to postponed rep#3 does not satisfy "K1_rep?K1_eff_max", and SPS PDSCH#2 satisfies "K1_rep?K1_eff_max". In Variation 4, different from Variation 3, for at least one SPS PDSCH corresponding to HARQ-ACK PUCCH, when the restriction of K1_rep is satisfied, it is determined that the postponement restriction is satisfied. Therefore, in Variation 4, for postponed rep#3, the postponement restriction is satisfied. In this case, for postponed rep#3, SPS HARQ-ACK for SPS PDSCH#1 and SPS PDSCH#2 may be transmitted. Also, in postponed rep#4, similar to postponed rep#3, the postponement restriction is satisfied.

[0157] Point 4: Application Conditions for the Deadline of SPS HARQ-ACK The application conditions for applying the deadline of SPS HARQ-ACK to a certain PUCCH include the following conditions. Note that the application conditions are not limited to the following examples.

[0158] Condition 1: There is an SPS HARQ-ACK for an SPS PDSCH setting where postponement is effective in the PUCCH. Note that in this condition, the number of SPS HARQ-ACKs may be 1 or more. Also, there is no dynamic HARQ-ACK in the PUCCH, and there does not have to be any other SPS HARQ-ACK for an SPS setting where postponement is not effective. Also, in this case, the PUCCH may include only the SPS HARQ-ACK for the SPS setting where postponement is effective.

[0159] Condition 2: When there is an SPS HARQ-ACK on the PUCCH and at least one SPS HARQ-ACK corresponds to an SPS configuration for which postponement is valid. In this case, there may be no dynamic HARQ-ACK. Also, it does not matter (is not dependent) whether there are other SPS HARQ-ACKs for SPS configurations for which postponement is not valid. For example, the PUCCH may contain only SPS HARQ-ACKs.

[0160] Condition 3: When there is an SPS HARQ-ACK on the PUCCH and the postponement of the SPS HARQ-ACK is valid for any SPS. In this case, there may be no dynamic HARQ-ACK on the PUCCH. Also, it does not matter whether the SPS HARQ-ACK bits belong to an SPS configuration for which postponement is valid. For example, the PUCCH may contain only SPS HARQ-ACKs.

[0161] Condition 4: Any HARQ-ACK for an SPS PDSCH configuration for which postponement is valid exists on the PUCCH. In this case, it does not matter whether there is a dynamic HARQ-ACK. Also, it does not matter whether there are HARQ-ACKs for other SPS configurations for which postponement is not valid.

[0162] Condition 5: Any SPS HARQ-ACK exists on the PUCCH and the postponement of the SPS HARQ-ACK for any SPS configuration is valid. In this case, it does not matter whether there is a dynamic HARQ-ACK. Also, it does not matter whether the SPS HARQ-ACK bits belong to an SPS configuration for which postponement is valid.

[0163] Note that if the application conditions are not met, the rules for deferring the conventional Rel-16 PUCCH repetition may be applied.

[0164] Next, Proposal 1 for Case 1-2 will be described.

[0165] (Proposal 1 Case 1-2) Case 1-2 is a case where, in Case 1, the PUCCH resource in the initial slot (e.g., the first PUCCH repetition) does not overlap with an invalid symbol (e.g., a semi-static DL or SSB symbol), and one or more of the PUCCH repetitions other than the first PUCCH repetition overlap with a semi-static DL or SSB symbol.

[0166] For Proposal 1 for Case 1-2, any of the following options applies.

[0167] Option 1: Follow the Rel-16 rules. For example, the terminal follows the Rel-16 operation. This is the same as Option 1 of Proposal 1 for Case 1-1.

[0168] Note that in Option 1, any PUCCH repetition that collides with an invalid symbol may be postponed until the next available slot.

[0169] Option 2: The Rel-17 SPS HARQ-ACK deferring limitation is applied to the PUCCH repetition postponing restriction of Rel-16.

[0170] For example, in Option 2 of Proposal 1 for Case 1-2, Option 3 of Proposal 1 for Case 1-1 described above may be applied. Exemplarily, Option 3 including Alt.2 for Point 3 shown in Option 3 may be applied.

[0171] According to the above-mentioned Proposal 1, between PUCCH repetition and the postponement of SPS HARQ ACK, the terminal can selectively control PUCCH transmission, or control PUCCH transmission in a manner that integrates PUCCH repetition and the postponement of SPS HARQ ACK. Therefore, in a radio system capable of setting resources for transmitting PUCCH considering PUCCH repetition, the terminal can operate appropriately.

[0172] Also, in the above-mentioned Proposal 1, for both Case 1-1 and Case 1-2, the control of PUCCH transmission including the setting of resources for transmitting PUCCH can be appropriately performed.

[0173] Note that in the above example, an example where Proposal 1 is applied to both Case 1-1 and Case 1-2 is shown, but the present disclosure is not limited thereto. Proposal 1 may be applied to cases other than Case 1-1 and Case 1-2.

[0174] (Proposal 2 Case 2) As described above, Case 2 is a HARQ-ACK PUCCH having postponed SPS HARQ-ACK bits in the target slot, and in the target slot, N PUCCH repeat >1 is the case determined for the PUCCH.

[0175] For Case 2, in Proposal 2, any of the following three options is applied.

[0176] Option 0: It is processed as an error case. In this case, both the postponement of SPS HARQ-ACK and the operation of PUCCH repetition may not be executed, or either one may be executed and the other may not be executed. The operation to be executed may be defined in advance by the specification, or information regarding the operation to be executed may be notified to the terminal. The method of notification is not particularly limited.

[0177] Option 1: Do not perform PUCCH repetition of HARQ-ACK PUCCH in the target slot including the postponed SPS HARQ-ACK.

[0178] In the case of Option 1, when there is a postponed SPS HARQ-ACK in the PUCCH, the terminal assumes N_rep = 1. In this case, the PUCCH repetition factor for the PUCCH resource or PUCCH format may be ignored.

[0179] Option 2: PUCCH repetition of HARQ-ACK PUCCH in the target slot including the postponed SPS HARQ-ACK may be applied.

[0180] For this Option 2, either of the following Option 2-1 and Option 2-2 may be applied.

[0181] Option 2-1: N_rep is determined in the same way as the determination of the legacy PUCCH repetition factor. For example, N_rep is determined to be N PUCCH repeat as such. The determination of the legacy PUCCH repetition factor may be, for example, the method specified in Release 16 or a release prior to Release 16.

[0182] Option 2-2: N_rep is determined based on the combination of the determination of the legacy PUCCH repetition factor and the maximum delay limit for each SPS setting. For example, the determination of the legacy PUCCH repetition factor corresponds to determining N PUCCH repeat as such. Also, for example, the maximum delay limit for each SPS setting is the limit value using K1_eff_max = K1 + K_max_def as described above.

[0183] An example of determining N_rep for Option 2-2 is shown. For example, in the first example of determination (hereinafter, Option 2-2A), it is intended that N_rep guarantees that the last repetition of PUCCH repetition is within the maximum deferral limitation for each of the SPS PDSCHs. For example, N_rep is determined using Equation (1). [Number]

[0184] Another example of determining N_rep for Option 2-2 is shown. For example, in the second example of determination (hereinafter, Option 2-2B), it is intended that N_rep guarantees that the last repetition of PUCCH repetition is within the maximum deferral limitation for at least one of the SPS PDSCHs. For example, N_rep is determined using Equation (2). [Number]

[0185] Here, in Equation (1) and Equation (2), K1_eff represents the slot offset from the SPS PDSCH slot to the target slot, and K1_eff_max represents the maximum deferral limitation set for each SPS setting according to Rel-17. Note that for SPS settings where deferral is not effective, the maximum deferral limitation may be K1_eff_max = K1.

[0186] For the variations of Proposal 2 for Case 2 described above, there may be examples of multiple sub-cases in Case 2. For example, · Case 2-1: A case where the new HARQ-ACK is included in the PUCCH of the target slot. · Case 2-1A: The new HARQ-ACK includes only the new SPS HARQ-ACK. · Case 2-1B: The new HARQ-ACK includes only the new dynamic HARQ-ACK. · Case 2-1C: The new HARQ-ACK includes the new dynamic HARQ-ACK and the new SPS HARQ-ACK. · Case 2-2: A case where the HARQ-ACK PUCCH in the target slot includes the postponed SPS HARQ-ACK bits. Here, the new HARQ-ACK may be a HARQ-ACK that is not a postponed HARQ-ACK.

[0187] In Proposal 2 for Case 2, different options may be applied for each sub-case of Case 2 as described above. For example, Option 1 is applied to Case 2-2, and Option 2-1 is applied to Case 2-1A.

[0188] Here, the variations in Proposal 2 for Case 2 above will be described with reference to figures. FIG. 12 is a diagram showing a first example of Proposal 2 for Case 2. Four options are illustrated in FIG. 12. In each option, ten slots are shown. Similar to FIG. 4, in FIG. 12, "D" for each slot indicates a DL slot, and "U" indicates a UL slot.

[0189] In each option, the first slot includes SPS PDSCH#1, and the second slot includes SPS PDSCH#2. Exemplarily, for SPS PDSCH#1, K1 = 2 and K1_eff_max = 4 are set, and for SPS PDSCH#2, K1 = 1 and K1_eff_max = 4 are set.

[0190] For SPS PDSCH#1, K1 = 2, and for SPS PDSCH#2, K1 = 1. Therefore, the SPS HARQ-ACK for each SPS PDSCH can be transmitted from the third slot, and the case where N PUCCH repeat = 4 will be described. As shown in FIG. 12, in each option, in the third slot, the SPS HARQ-ACK overlaps with the semi-static DL.

[0191] In Option 1 of Proposal 2 in Case 2, PUCCH repetition of the HARQ-ACK PUCCH within the target slot including the deferred SPS HARQ-ACK is not performed. Therefore, in Option 1 of FIG. 12, in the fourth UL slot, the deferred SPS HARQ-ACK is transmitted and PUCCH repetition is not performed.

[0192] In Option 2-1 of Proposal 2 in Case 2, N_rep is determined in the same way as the determination of the legacy PUCCH repetition factor. Therefore, in Option 2-1 of FIG. 12, N_rep = N PUCCH repeat = 4 is determined, and PUCCH repetition is performed in four slots from the fourth slot to the seventh slot.

[0193] In Option 2-2 of Proposal 2 in Case 2, N_rep is determined based on the combination of the determination of the legacy PUCCH repetition factor and the maximum deferral limit for each SPS setting. And in Option 2-2A, N_rep guarantees that the last repetition of the PUCCH repetition is within the maximum deferral limitation for each of the SPS PDSCHs.

[0194] In Option 2-2A of FIG. 12, in the fourth slot, since K1_eff for SPS PDSCH#1 is K1_eff = 3, K1_eff_max - K1_eff + 1 = 4 - 3 + 1 is calculated. Also, since K1_eff for SPS PDSCH#1 is K1_eff = 2, K1_eff_max - K1_eff + 1 = 4 - 2 + 1 is calculated. Thus, N_rep is calculated using Equation (1) as N_rep = min[min(4 - 3 + 1, 4 - 2 + 1), N PUCCH repeat = 2. In Option 2-2A of FIG. 12, according to N_rep = 2, two PUCCH repetitions are performed.

[0195] In Option 2-2 of Proposal 2 in Case 2, N_rep is determined based on a combination of the determination of the legacy PUCCH repetition factor and the maximum deferral limit for each SPS setting. And in Option 2-2B, N_rep ensures that the last repetition of PUCCH is within the maximum deferral limitation for at least one of the SPS PDSCHs.

[0196] In Option 2-2B of FIG. 12, similar to Option 2-2A, in the fourth slot, since K1_eff for SPS PDSCH#1 is K1_eff = 3, K1_eff_max - K1_eff + 1 = 4 - 3 + 1 is calculated. Also, since K1_eff for SPS PDSCH#1 is K1_eff = 2, K1_eff_max - K1_eff + 1 = 4 - 2 + 1 can be calculated. Thus, N_rep is calculated using Equation (2) as N_rep = min[max(4 - 3 + 1, 4 - 2 + 1), N PUCCH repeat = 3. In Option 2-2B of FIG. 12, according to N_rep = 3, three PUCCH repetitions are performed.

[0197] (Supplement to Option 2 of Proposal 2) The definition of the target slot ensures that the first PUCCH repetition within the target slot does not overlap with an invalid symbol (e.g., a semi-static DL or SSB symbol). However, there is a possibility that subsequent PUCCH repetitions after the first PUCCH repetition may overlap with an invalid symbol. The operation of the terminal in such a case is described.

[0198] For example, for a PUCCH containing postponed SPS HARQ-ACK bits, if a PUCCH repetition other than the first PUCCH repetition overlaps with a semi-static DL or SSB symbol, one of the following is selected.

[0199] Alt.1: The Rel-16 PUCCH repetition back-off rule is not applied. In this case, for a PUCCH repetition other than the first PUCCH repetition that overlaps with a semi-static DL or SSB symbol, the PUCCH repetition may be dropped.

[0200] Alt.2: The conventional Rel-16 PUCCH repetition back-off rule may be applied. For example, a PUCCH containing postponed SPS HARQ-ACK bits is treated in the same way as a Rel-16 PUCCH. In this case, a PUCCH repetition other than the first PUCCH repetition that overlaps with a semi-static DL or SSB symbol may be deferred to the next available slot. The next available slot may be a slot subsequent to the overlapping slot and that is an available slot.

[0201] Alternative 3: The rule for delaying Rel-16 PUCCH repetitions applies, but this rule is integrated with the SPS HARQ-ACK deferring limitation for Rel-17. For example, in this case, Option 3 of Proposal 1 for Case 1-1 described above may be applied. Exemplarily, Option 3 including Alt.2 for Point 3 shown in Option 3 may be applied.

[0202] Note that different options may be applied to different sub-cases. For example, Alt.1 may be applied to Case 2-2, and Alt.2 may be applied to Case 2-2.

[0203] Here, Alt.1 and Alt.2 above will be described with reference to figures. FIG. 13 is a diagram showing the supplement of Option 2 of Proposal 2. Alt.1 and Alt.2 are illustrated in FIG. 13. In Alt.1 and Alt.2, 10 slots are shown respectively. Similar to FIG. 4, in FIG. 13, "D" in each slot indicates a DL slot, and "U" indicates a UL slot.

[0204] In the examples of Alt.1 and Alt.2, the first slot includes SPS PDSCH#1, and the second slot includes SPS PDSCH#2. Also, the case where the SPS HARQ-ACK for each SPS PDSCH can be transmitted from the third slot will be described. In the third slot, the SPS HARQ-ACK overlaps with the semi-static DL. Therefore, the PUCCH repetition for transmitting the SPS HARQ-ACK is deferred.

[0205] In each example of FIG. 13, the first PUCCH repetition of the fourth slot, which is the target slot, does not overlap with an invalid symbol (e.g., a semi-static DL or SSB symbol). However, the third PUCCH repetition (sixth slot) and the fourth PUCCH repetition (seventh slot) following the first PUCCH repetition overlap with the invalid symbol.

[0206] In Alt.1, the retransmission rules for Rel-16 PUCCH are not applied. Therefore, in the example of Alt.1 in FIG. 13, the third and fourth PUCCH repetitions that overlap with the invalid symbol are not transmitted (dropped).

[0207] In Alt.2, the conventional retransmission rules for Rel-16 PUCCH may be applied. Therefore, in the example of Alt.2 in FIG. 13, the third and fourth PUCCH repetitions that overlap with the invalid symbol are further retransmitted. In the example of Alt.2 in FIG. 13, the retransmitted third and fourth PUCCH repetitions are transmitted in the eighth and ninth slots.

[0208] According to Proposal 2 described above, between PUCCH repetition and SPS HARQ ACK postponement, a terminal can selectively control PUCCH transmission or control PUCCH transmission in a manner that integrates PUCCH repetition and SPS HARQ ACK postponement. Therefore, in a radio system capable of setting resources for transmitting PUCCH considering PUCCH repetition, the terminal can operate appropriately.

[0209] Also, in Proposal 2 described above, for Case 2, control of PUCCH transmission including setting resources for transmitting PUCCH can be appropriately performed.

[0210] In the above example, an example where Proposal 2 is applied to Case 2 is shown, but the present disclosure is not limited thereto. Proposal 2 may be applied to cases other than Case 2.

[0211] By adopting any of the proposals described above and the options (or alternations (Alt.)) of each proposal, in a radio system capable of setting resources for transmitting an uplink control signal (for example, a signal including SPS HARQ-ACK) considering the repetition of the uplink control signal (for example, a PUCCH signal), the terminal can perform appropriate operations.

[0212] In each of the proposals described above, among the options (or alternations (Alt.)) of each proposal, which option (or alternation) to use may be defined by the specification or set by upper layer parameters. Also, among the options (or alternations) of each proposal, which option (or alternation) to use may be reported by the terminal based on the terminal's capability information (for example, "UE capability"). Further, among the options (or alternations) of each proposal, which option (or alternation) to use may be determined by a combination of the setting of upper layer parameters and the reported terminal capability information. For example, the base station determines one or more options (or alternations) from among the options (or alternations) that the reported terminal capability information indicates the terminal can use, and the determined information may be set by upper layer parameters. Note that the present disclosure is not limited to examples set by upper layer parameters, and information on the option (or alternation) to be used may be notified by physical layer control information (for example, DCI).

[0213] Note that in this embodiment, "slot" may be replaced with "sub-slot". Also, in the above embodiment, "slot" is a term referring to a certain time interval and may be replaced with other notations. For example, "slot" may be replaced with other notations such as "symbol", "time interval", "time resource".

[0214] Note that in this embodiment, SPS is taken as an example for explanation, but the present disclosure is not limited thereto. For example, instead of SPS, the present disclosure may be applied to persistent scheduling or dynamic scheduling.

[0215] Also, in this embodiment, SPS PDSCH and SPS HARQ-ACK for SPS PDSCH are taken as examples for explanation, but the present disclosure is not limited thereto. For example, the present disclosure may be applied to a data channel different from SPS PDSCH and an acknowledgement response for the data channel. Also, the present disclosure may be applied not only to data channels but also to control channels (e.g., PDCCH) and acknowledgement responses for control channels. Also, the present disclosure may be applied to feedback information different from SPS HARQ-ACK.

[0216] Different options (or alternations) may be applied to different PUCCH repetition schemes. For example, each proposed option applied to a slot-based PUCCH repetition scheme and each proposed option applied to a sub-slot-based PUCCH repetition scheme may be different from each other.

[0217] The UE capability information may include, for example, information specifying whether the terminal supports PUCCH repetition, information specifying whether the terminal supports SPS HARQ-ACK deferral, and information specifying whether the terminal supports both PUCCH repetition and SPS HARQ-ACK deferral. Further, the UE capability information may include information indicating whether the terminal supports each of the above-described proposals and / or whether the terminal supports each option (or each alternation) of each proposal.

[0218] Note that, in the present embodiment, the expressions "deferral" and "postponing" may be mutually replaced. Further, "deferral" and "postponing" may each be replaced with other expressions such as "delay", "postponement", and "arrearage".

[0219] Also, in the present embodiment, the expressions "limitation" and "restriction" may be mutually replaced. Further, the expressions "limitation" and "restriction" may be replaced with other expressions such as "constraint", "limitation", and "restraint".

[0220] <Example of a wireless communication system> The wireless communication system according to the present embodiment includes the base station 10 shown in FIG. 14 and the terminal 20 shown in FIG. 15. The number of base stations 10 and the number of terminals 20 are not particularly limited. A system in which two base stations 10 communicate with one terminal 20 may be used. The wireless communication system may be a wireless communication system compliant with New Radio (NR). Exemplarily, the wireless communication system may be a wireless communication system compliant with a scheme called URLLC and / or IIoT.

[0221] Note that the wireless communication system may also be a wireless communication system compliant with a scheme called 5G, Beyond 5G, 5G Evolution, or 6G.

[0222] The base station 10 may also be referred to as an NG-RAN Node, ng-eNB, eNodeB (eNB), or gNodeB (gNB). The terminal 20 may also be referred to as a User Equipment (UE). Further, the base station 10 may be regarded as a device included in the network to which the terminal 20 is connected.

[0223] The wireless communication system may include a Next Generation-Radio Access Network (hereinafter, NG-RAN). The NG-RAN includes a plurality of NG-RAN Nodes, specifically, gNBs (or ng-eNBs), and is connected to a core network (5GC, not shown) compliant with 5G. Note that the NG-RAN and 5GC may simply be expressed as the "network".

[0224] The base station 10 performs wireless communication with the terminal 20. For example, the wireless communication performed follows NR. At least one of the base station 10 and the terminal 20 may correspond to Massive MIMO (Multiple-Input Multiple-Output) that generates a more directional beam (BM) by controlling wireless signals transmitted from a plurality of antenna elements. Further, at least one of the base station 10 and the terminal 20 may correspond to carrier aggregation (CA) that bundles and uses a plurality of component carriers (CCs). Further, at least one of the base station 10 and the terminal 20 may correspond to dual connectivity (DC) that communicates between the terminal 20 and each of a plurality of base stations 10.

[0225] The wireless communication system may correspond to a plurality of frequency bands. For example, the wireless communication system corresponds to Frequency Range (FR) 1 and FR2. The frequency bands of each FR are, for example, as follows. ·FR1: 410 MHz to 7.125 GHz ·FR2: 24.25 GHz to 52.6 GHz

[0226] In FR1, a Sub-Carrier Spacing (SCS) of 15 kHz, 30 kHz, or 60 kHz is used, and a bandwidth (BW) of 5 MHz to 100 MHz may be used. FR2 is, for example, a frequency higher than FR1. In FR2, an SCS of 60 kHz or 120 kHz is used, and a bandwidth (BW) of 50 MHz to 400 MHz may be used. Also, in FR2, an SCS of 240 kHz may be included.

[0227] The wireless communication system in this embodiment may support a frequency band higher than the FR2 frequency band. For example, the wireless communication system in this embodiment may support frequency bands exceeding 52.6 GHz and up to 114.25 GHz. Such a high-frequency band may be referred to as "FR2x".

[0228] Also, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform - Spread - Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) with a larger Sub-Carrier Spacing (SCS) than the above examples may be applied. Also, DFT-S-OFDM may be applied to both the uplink and the downlink, or to either one of them.

[0229] In the wireless communication system, a time-division duplexing (TDD) slot configuration pattern may be set. For example, in the slot configuration pattern, a pattern indicating the order of two or more slots among a slot for transmitting a downlink (DL) signal, a slot for transmitting an uplink (UL) signal, a slot in which DL signals, UL signals, and guard symbols are mixed, and a slot in which the signal to be transmitted is flexibly changed may be defined.

[0230] Also, in a wireless communication system, channel estimation of PUSCH (or PUCCH (Physical Uplink Control Channel)) can be performed using a demodulation reference signal (DMRS) for each slot. Furthermore, channel estimation of PUSCH (or PUCCH) can be performed using DMRSs respectively assigned to a plurality of slots. Such channel estimation may be called Joint channel estimation. Alternatively, it may be called by another name such as cross-slot channel estimation.

[0231] The terminal 20 may transmit DMRSs respectively assigned to a plurality of slots in the plurality of slots so that the base station 10 can perform Joint channel estimation using the DMRSs.

[0232] Also, in a wireless communication system, a function enhanced for the feedback function from the terminal 20 to the base station 10 may be added. For example, a function enhanced for the terminal's feedback for HARQ-ACK may be added.

[0233] Next, the configurations of the base station 10 and the terminal 20 will be described. Note that the configurations of the base station 10 and the terminal 20 described below show an example of functions related to the present embodiment. The base station 10 and the terminal 20 may have functions not shown in the figure. Also, as long as it is a function for executing the operations according to the present embodiment, the function classification and / or the name of the functional unit are not limited.

[0234] <Configuration of the base station> FIG. 14 is a block diagram showing an example of the configuration of the base station 10 according to the present embodiment. The base station 10 includes, for example, a transmission unit 101, a reception unit 102, and a control unit 103. The base station 10 communicates wirelessly with the terminal 20 (see FIG. 15).

[0235] The transmitting unit 101 transmits a downlink (DL) signal to the terminal 20. For example, the transmitting unit 101 transmits a DL signal under the control of the control unit 103.

[0236] The DL signal may include, for example, a downlink data signal and control information (e.g., Downlink Control Information (DCI)). A signal including control information may also be referred to as a control signal. Further, the DL signal may include information indicating scheduling for signal transmission of the terminal 20 (e.g., UL grant). Also, the DL signal may include upper layer control information (e.g., control information of Radio Resource Control (RRC)). For example, upper layer signaling (e.g., RRC signaling, or MAC CE (Media Access Control Control Element)) may be regarded as an example of the DL signal. Further, the DL signal may include a reference signal.

[0237] The channels used for transmitting the DL signal include, for example, a data channel and a control channel. For example, the data channel may include PDSCH (Physical Downlink Shared Channel), and the control channel may include PDCCH (Physical Downlink Control Channel). For example, the base station 10 transmits control information to the terminal 20 using the PDCCH and transmits a downlink data signal using the PDSCH.

[0238] The reference signals included in the DL signal may include at least one of, for example, a Demodulation Reference Signal (DMRS), a Phase Tracking Reference Signal (PTRS), a Channel State Information-Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), and a Positioning Reference Signal (PRS) for position information. For example, reference signals such as DMRS and PTRS are used for demodulating downlink data signals and are transmitted using the PDSCH.

[0239] The receiving unit 102 receives an uplink (UL) signal transmitted from the terminal 20. For example, the receiving unit 102 receives the UL signal under the control of the control unit 103.

[0240] The control unit 103 controls the communication operations of the base station 10, including the transmission processing of the transmission unit 101 and the reception processing of the receiving unit 102.

[0241] For example, the control unit 103 acquires information such as data and control information from the upper layer and outputs it to the transmission unit 101. Also, the control unit 103 outputs data and control information etc. received from the receiving unit 102 to the upper layer.

[0242] For example, the control unit 103 allocates resources (or channels) used for the transmission and reception of DL signals and / or resources used for the transmission and reception of UL signals based on signals received from the terminal 20 (such as data and control information etc.) and / or data and control information etc. acquired from the upper layer. Information regarding the allocated resources may be included in the control information transmitted to the terminal 20.

[0243] As an example of the allocation of resources used for the transmission and reception of UL signals, the control unit 103 sets PUCCH resources. Information regarding the setting of PUCCH (PUCCH setting information), such as the PUCCH cell timing pattern, may be notified to the terminal 20 by RRC.

[0244] <Configuration of the terminal> FIG. 15 is a block diagram showing an example of the configuration of the terminal 20 according to the present embodiment. The terminal 20 includes, for example, a receiving unit 201, a transmitting unit 202, and a control unit 203. The terminal 20 communicates wirelessly with the base station 10, for example.

[0245] The receiving unit 201 receives the DL signal transmitted from the base station 10. For example, the receiving unit 201 receives the DL signal under the control of the control unit 203.

[0246] The transmitting unit 202 transmits the UL signal to the base station 10. For example, the transmitting unit 202 transmits the UL signal under the control of the control unit 203.

[0247] The UL signal may include, for example, an uplink data signal and control information (e.g., UCI). For example, information regarding the processing capability of the terminal 20 (e.g., UE capability) may be included. Further, the UL signal may include a reference signal.

[0248] The channels used for the transmission of the UL signal include, for example, a data channel and a control channel. For example, the data channel includes PUSCH (Physical Uplink Shared Channel), and the control channel includes PUCCH (Physical Uplink Control Channel). For example, the terminal 20 receives control information from the base station 10 using PUCCH and transmits an uplink data signal using PUSCH.

[0249] The reference signals included in the UL signal may include at least one of, for example, DMRS, PTRS, CSI-RS, SRS, and PRS. For example, reference signals such as DMRS and PTRS are used for demodulation of uplink data signals and are transmitted using an uplink channel (e.g., PUSCH).

[0250] The control unit 203 controls the communication operation of the terminal 20, including reception processing in the reception unit 201 and transmission processing in the transmission unit 202.

[0251] For example, the control unit 203 acquires information such as data and control information from a higher layer and outputs it to the transmission unit 202. Also, the control unit 203 outputs, for example, data and control information received from the reception unit 201 to a higher layer.

[0252] For example, the control unit 203 controls the transmission of information to be fed back to the base station 10. The information to be fed back to the base station 10 may include, for example, HARQ-ACK, may include channel state information (CSI), or may include a scheduling request (SR). The information to be fed back to the base station 10 may be included in UCI. UCI is transmitted in the resources of PUCCH.

[0253] The control unit 203 sets PUCCH resources based on the configuration information received from the base station 10 (e.g., configuration information such as the PUCCH cell timing pattern notified by RRC and / or DCI). The control unit 203 determines the PUCCH resources to be used for transmitting the information to be fed back to the base station 10. The transmission unit 202 transmits the information to be fed back to the base station 10 in the PUCCH resources determined by the control unit 203 under the control of the control unit 203.

[0254] Note that the channels used for transmitting DL signals and the channels used for transmitting UL signals are not limited to the examples described above. For example, the channels used for transmitting DL signals and the channels used for transmitting UL signals may include a RACH (Random Access Channel) and a PBCH (Physical Broadcast Channel). The RACH may be used, for example, for transmitting Downlink Control Information (DCI) including a Random Access Radio Network Temporary Identifier (RA-RNTI).

[0255] The receiving unit 201 may receive a DL control signal (DL control signal). The DL control signal is, for example, a signal that controls PUCCH repetition and / or the postponement of SPS HARQ ACK, and may be a signal such as DCI, MAC CE, and / or RRC.

[0256] The control unit 203 may control (determine) the repeated transmission of a UL control signal (for example, PUCCH repetition) and the postponement of the transmission of a UL control signal (for example, SPS HARQ-ACK deferring) based on the DL control signal received by the receiving unit 203. The UL control signal may be, for example, a signal included in the PUCCH. The repeated transmission may be slot-based repetition, sub-slot-based repetition, or dynamic repeated transmission. More specifically, the repeated transmission may be slot-based PUCCH repetition, sub-slot-based PUCCH repetition, or dynamic PUCCH repetition.

[0257] The control unit 203 does not necessarily need to assume that both the repeated transmission of the UL control signal and the postponement of the transmission of the UL control signal are performed (or set / enabled) simultaneously. Also, the control unit 203 may assume that both the repeated transmission of the UL control signal and the postponement of the transmission of the UL control signal are performed (or set / enabled) simultaneously.

[0258] When both the repeated transmission of the UL control signal and the delay of the transmission of the UL control signal are enabled simultaneously, the control unit 203 may control the transmission of the UL control signal in accordance with at least one of the regulations of the repeated transmission of the UL control signal and the delay of the transmission of the UL control signal.

[0259] When both the repeated transmission of the UL control signal and the delay of the transmission of the UL control signal are enabled simultaneously, the control unit 203 may control the transmission of the UL control signal in accordance with the regulation of the repeated transmission of the UL control signal modified based on the regulation of the delay of the transmission of the UL control signal.

[0260] With the above configuration, in a radio system capable of repeating the transmission of the UL control signal and delaying the transmission of the UL control signal, the terminal 20 can appropriately operate the transmission control of the UL control signal including the setting of the resource for transmitting the UL control signal.

[0261] The above is the description of the present disclosure.

[0262] <Hardware configuration, etc.> Note that the block diagrams used in the description of the above embodiments show blocks of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically combined device, or two or more physically or logically separated devices may be directly or indirectly (e.g., using wired, wireless, etc.) connected and realized using these multiple devices. The functional block may be realized by combining software with the above one device or the above multiple devices.

[0263] The functions include, but are not limited to, judgment, decision-making, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection determination, establishment, comparison, assumption, expectation, regarded as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), assigning, etc. For example, a functional block (component) that enables transmission is called a transmitting unit or a transmitter. In any case, as described above, the implementation method is not particularly limited.

[0264] For example, a base station, a terminal, etc. in an embodiment of the present disclosure may function as a computer that performs the processing of the wireless communication method of the present disclosure. FIG. 16 is a diagram showing an example of the hardware configuration of the base station and the terminal according to this embodiment. Physically, the above-described base station 10 and terminal 20 may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[0265] In the following description, the term "device" 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 each device shown in the figure, or may be configured without including some devices.

[0266] Each function in the base station 10 and the terminal 20 is realized by causing a predetermined software (program) to be loaded onto hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication by the communication device 1004, or controls at least one of reading and writing data in the memory 1002 and the storage 1003.

[0267] Processor 1001 controls the entire computer by operating, for example, an operating system. Processor 1001 may be constituted by a central processing unit (CPU: Central Processing Unit) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like. For example, the above-described control unit 103 and control unit 203 may be realized by processor 1001.

[0268] Further, processor 1001 reads a program (program code), software module, data, etc. from at least one of storage 1003 and communication device 1004 into memory 1002, and executes various processes according thereto. As the program, a program for causing a computer to execute at least a part of the operations described in the above embodiments is used. For example, control unit 203 of terminal 20 may be realized by a control program stored in memory 1002 and operating in processor 1001, and the same applies to other functional blocks. Although it has been described that the above various processes are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunication line.

[0269] Memory 1002 is a computer-readable recording medium and may be constituted by, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. Memory 1002 may be referred to as a register, cache, main memory (main storage device), etc. Memory 1002 can store a program (program code), software module, etc. executable for implementing the wireless communication method according to an embodiment of the present disclosure.

[0270] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disc, a digital versatile disc, a Blu-ray (registered trademark) disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc. Storage 1003 may be referred to as an auxiliary storage device. The above-described storage medium may be, for example, a database, a server, or other appropriate medium including at least one of the memory 1002 and the storage 1003.

[0271] The communication device 1004 is hardware (a transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). For example, the above-described transmission unit 101, reception unit 102, reception unit 201, and transmission unit 202, etc. may be realized by the communication device 1004.

[0272] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an external input. The output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that performs an output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (e.g., a touch panel).

[0273] Also, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or may be configured using different buses for each device.

[0274] Also, the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0275] <Notification of Information, Signaling> The notification of information is not limited to the 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)), upper layer signaling (e.g., radio resource control (RRC) signaling, medium access control (MAC) signaling, notification information (master information block (MIB), system information block (SIB))), other signals, or a combination thereof. Also, 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.

[0276] <Applicable System> The embodiments 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. Further, multiple systems may be combined (for example, a combination of at least one of LTE and LTE-A and 5G, etc.) and applied.

[0277] <Processing procedures, etc.> The processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be reordered as long as there is no contradiction. For example, regarding the methods described in the present disclosure, the elements of various steps are presented using an exemplary order and are not limited to the specific order presented.

[0278] <Operation of base station> The specific operations assumed to be performed by the base station in the present disclosure may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having a base station, various operations performed for communication with a terminal can clearly be performed by at least one of the base station and other network nodes other than the base station (for example, but not limited to, MME or S-GW, etc.). Although the case where there is one other network node other than the base station has been exemplified above, a combination of a plurality of other network nodes (for example, MME and S-GW) may also be possible.

[0279] <Input / Output Direction> Information, etc. (refer to the item of <information, signal>) can be output from the upper layer (or lower layer) to the lower layer (or upper layer). It may be input and output via a plurality of network nodes.

[0280] <Handling of Input / Output Information, etc.> The input / output information, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. The input / output information, etc. can be overwritten, updated, or appended. The output information, etc. may be deleted. The input information, etc. may be transmitted to other devices.

[0281] <Determination Method> The determination may be made by a value represented by 1 bit (0 or 1), may be made by a boolean value (Boolean: true or false), or may be made by a numerical comparison (for example, comparison with a predetermined value).

[0282] <Variations of the Aspect, etc.> Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched and used during execution. Also, the notification of predetermined information (for example, the notification of "being X") is not limited to being explicitly performed, and may be performed implicitly (for example, not performing the notification of the predetermined information).

[0283] As described above, the present disclosure has been described in detail. However, 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 as modified and changed aspects without departing from the spirit and scope of the present disclosure defined by the description of the claims. Therefore, the description of the present disclosure is for illustrative purposes and does not have any limiting meaning for the present disclosure.

[0284] <Software> Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc., whether called software, firmware, middleware, microcode, a hardware description language, or by any other name.

[0285] Also, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, when software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cables, optical fiber cables, twisted pairs, digital subscriber lines (DSLs)) and wireless technologies (such as infrared rays, microwaves), at least one of these wired and wireless technologies is included within the definition of the transmission medium.

[0286] <Information, Signal> The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be referred to throughout the above description, may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0287] In addition, terms described in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Also, a signal may be a message. Also, a component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0288] <System, network> The terms "system" and "network" used in this disclosure are used interchangeably.

[0289] <Parameter, channel name> Also, the information, parameters, etc. described in this disclosure may be represented using absolute values, relative values from a predetermined value, or using corresponding other information. For example, a radio resource may be indicated by an index.

[0290] The names used for the above-described parameters are not limiting names in any way. Furthermore, mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in this disclosure. Since various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are not limiting names in any way.

[0291] <Base station> In the present disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. The base station may also be referred to by terms such as macro cell, small cell, femto cell, pico cell, etc.

[0292] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides communication services in this coverage.

[0293] <Mobile Station> In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0294] The 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 appropriate terms.

[0295] <Base station / mobile station> At least one of the base station and the mobile station may be referred to as a transmission device, a reception device, a communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), a moving body that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanoid or unmanned). Note that at least one of the base station and the mobile station also includes a device that does not necessarily move during 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.

[0296] Also, the base station in the present disclosure may be read as a terminal. For example, for a configuration in which communication between the base station and the terminal is replaced with communication between a plurality of terminals (which may be referred to as, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.), the embodiments of the present disclosure may be applied. In this case, the functions of the above-described base station 10 may be configured as functions of the terminal 20. Also, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (e.g., "side"). For example, the uplink channel, the downlink channel, etc. may be read as side channels.

[0297] Similarly, the terminal in the present disclosure may be read as a base station. In this case, the functions of the above-described terminal 20 may be configured as functions of the base station 10.

[0298] <Meaning and interpretation of terms> As used herein, the terms "determining" and "deciding" may encompass a variety of operations. "Determining" and "deciding" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching a table, database, or other data structure), and ascertaining that something has been "determined" or "decided". "Determining" and "deciding" may also include receiving (e.g., receiving information), transmitting (e.g., transmitting information), inputting, outputting, and accessing (e.g., accessing data in memory) and ascertaining that something has been "determined" or "decided". "Determining" and "deciding" may also include resolving, selecting, choosing, establishing, comparing, and the like and ascertaining that something has been "determined" or "decided". That is, "determining" and "deciding" may include ascertaining that some operation has been "determined" or "decided". Further, "determining (deciding)" may be read as "assuming", "expecting", "considering", or the like.

[0299] The terms "connected" and "coupled", or any variations thereof, mean any direct or indirect connection or coupling between two or more elements, and can include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements can be physical, logical, or a combination thereof. For example, "connected" may be read as "accessed". As used in this disclosure, two elements can be considered to be "connected" or "coupled" to each other using at least one of one or more wires, cables, and printed electrical connections, as well as, by way of some non-limiting and non-exhaustive examples, electromagnetic energy having wavelengths in the radio frequency region, microwave region, and optical (both visible and invisible) region.

[0300] <Reference Signal> The reference signal can also be abbreviated as RS (Reference Signal) and may be referred to as a Pilot depending on the applicable standard.

[0301] <Meaning of "based on"> As used in this disclosure, the description "based on" does not mean "based only on" unless otherwise specified. In other words, the description "based on" means both "based only on" and "based at least on".

[0302] <"First", "Second"> Any reference to an element using the designations "first", "second", etc. as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, a reference to a first and a second element does not mean that only two elements can be employed or that the first element must precede the second element in any form.

[0303] <Means> In the configuration of each of the above devices, the "means" may be replaced with "section", "circuit", "device", etc.

[0304] <Open format> In the present disclosure, when the terms "include", "including" and their variants are used, these terms are intended to be inclusive, similar to the term "comprising". Further, the term "or" used in the present disclosure is not intended to be an exclusive disjunction.

[0305] <Time units such as TTI, frequency units such as RB, radio frame configuration> 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 does not depend on numerology.

[0306] Numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology may indicate, for example, at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processing performed by a transceiver in the frequency domain, and specific windowing processing performed by a transceiver in the time domain.

[0307] A slot may be composed of one or more symbols (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A slot may be a time unit based on a numerology.

[0308] A slot may include a plurality of mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. Also, a mini-slot may be called a sub-slot. A mini-slot may be composed of a smaller number of symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may be called a PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be called a PDSCH (or PUSCH) mapping type B.

[0309] A radio frame, a sub-frame, a slot, a mini-slot, and a symbol all represent time units for signal transmission. Different names corresponding to each of them may be used.

[0310] For example, one sub-frame may be called a transmission time interval (TTI), a plurality of consecutive sub-frames may be called a TTI, or one slot or one mini-slot may be called a TTI. That is, at least one of the sub-frame and the TTI may be a sub-frame (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, a mini-slot, etc. instead of a sub-frame.

[0311] Here, TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as the frequency bandwidth and transmission power that can be used at each user terminal) to each user terminal in units of TTI. Note that the definition of TTI is not limited to this.

[0312] TTI may be a transmission time unit such as a channel-coded data packet (transport block), code block, codeword, etc., or may be a processing unit such as scheduling and link adaptation. Note that when TTI is given, the time interval (e.g., the number of symbols) in which a transport block, code block, codeword, etc. are actually mapped may be shorter than the TTI.

[0313] Note that when one slot or one mini-slot is called TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) may be the minimum time unit of scheduling. Also, the number of slots (mini-slot numbers) constituting the minimum time unit of the scheduling may be controlled.

[0314] A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel.8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. A TTI shorter than the normal TTI may be called a shortened TTI, short TTI, partial TTI, shortened subframe, short subframe, mini-slot, sub-slot, slot, etc.

[0315] Note that a long TTI (e.g., a normal TTI, subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, or a short TTI (e.g., a shortened TTI, etc.) may be read as a TTI having a TTI length less than that of the long TTI and not less than 1 ms.

[0316] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and in the frequency domain, it may include one or more consecutive subcarriers. The number of subcarriers included in an RB may be the same regardless of the numerology, for example, it may be 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0317] Also, the time domain of an RB may include one or more symbols, and may be the length of 1 slot, 1 mini-slot, 1 sub-frame, or 1 TTI. 1 TTI, 1 sub-frame, etc. may each be composed of one or more resource blocks.

[0318] Note that one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0319] Also, a resource block may be composed of one or more resource elements (REs). For example, 1 RE may be a radio resource area of 1 subcarrier and 1 symbol.

[0320] A bandwidth part (BWP) (which may also be called a partial bandwidth, etc.) may represent a subset of consecutive common resource blocks (RBs) for a certain numerology in a certain carrier. Here, the common RB may be specified by the index of the RB based on the common reference point of the carrier. A PRB is defined in a certain BWP and may be numbered within the BWP.

[0321] The BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or more BWPs may be configured within one carrier for a UE.

[0322] At least one of the configured BWPs may be active, and the UE may not be assumed to transmit and receive a predetermined signal / channel outside the active BWP. Note that "cell", "carrier", etc. in the present disclosure may be read as "BWP".

[0323] The structures such as the radio frames, subframes, slots, minislots, and symbols described above 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, and the number of symbols, symbol length, cyclic prefix (CP) length, etc. within a TTI can be changed in various ways.

[0324] <Maximum transmit power> The "maximum transmit power" described in the present disclosure may mean the maximum value of the transmit power, or may mean the nominal UE maximum transmit power, or may mean the rated UE maximum transmit power.

[0325] <Article> In the present disclosure, for example, when an article is added by translation like a, an, and the in English, the present disclosure may include that the noun following these articles is in the plural form.

[0326] <"Different"> In the present disclosure, the term "A and B are different" may mean that "A and B are different from each other". Note that the term may also mean that "A and B are each different from C". Terms such as "separate" and "coupled" may also be interpreted in the same way as "different".

Industrial Applicability

[0327] One aspect of the present disclosure is useful for a wireless communication system.

Explanation of Signs

[0328] 10 Base station 20 Terminal 101, 202 Transmission unit 102, 201 Reception unit 103, 203 Control unit

Claims

Claim 1. A terminal comprising: a receiving unit that receives a downlink shared channel based on semi-persistent scheduling (SPS); a transmitting unit that transmits an acknowledgement response to the downlink shared channel via an uplink control channel; a control unit that sets a delay in transmission of the acknowledgement response; wherein when setting the delay in transmission of the acknowledgement response, the control unit assumes that no repetition of resources for the uplink control channel is set. Claim 2. The terminal according to claim 1, wherein the receiving unit receives setting information of resources of the uplink control channel, and when setting the delay in transmission of the acknowledgement response, the control unit assumes that no repetition of the uplink control channel is set in the setting information. Claim 3. A base station comprising: a transmitting unit that transmits a downlink shared channel based on semi-persistent scheduling (SPS); a receiving unit that receives an acknowledgement response to the downlink shared channel via an uplink control channel; a control unit that sets a delay in transmission of the acknowledgement response; wherein when setting the delay in transmission of the acknowledgement response, the control unit does not set repetition of resources for the uplink control channel. Claim 4. A wireless communication method, wherein a terminal receives a downlink shared channel based on semi-persistent scheduling (SPS), transmits an acknowledgement response to the downlink shared channel via an uplink control channel, sets a delay in transmission of the acknowledgement response, and when setting the delay in transmission of the acknowledgement response, assumes that no repetition of resources for the uplink control channel is set. Claim 5. A wireless communication system comprising: a terminal that receives a downlink shared channel based on semi-persistent scheduling (SPS), transmits an acknowledgement response to the downlink shared channel via an uplink control channel, and sets a delay in transmission of the acknowledgement response; and a base station that transmits the downlink shared channel, receives the acknowledgement response via the uplink control channel, and sets a delay in transmission of the acknowledgement response; wherein when setting the delay in transmission of the acknowledgement response, the terminal assumes that no repetition of resources for the uplink control channel is set. ​ ​ ​ ​ ​

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