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

Abstract

This terminal comprises: a communication unit that communicates with a cell to which a duplexing scheme capable of executing simultaneous communication of an uplink signal and a downlink signal within a time division duplex band is applied; and a control unit that, in a setting in which transmission of the uplink signal or reception of the downlink signal is limited to either a first symbol or a second symbol, when bundling of acknowledgements for a plurality of downlink channels scheduled by one piece of downlink control information is executed, executes the bundling of acknowledgements for the plurality of downlink channels while excluding the influence of a downlink channel, among the plurality of downlink channels, that includes the symbol type that has been disabled as a result of the setting.

Description

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

[0001] The present disclosure relates to a terminal, a base station, a wireless communication system, and a wireless communication method in a next-generation mobile communication system.

[0002] The 3rd Generation Partnership Project (3GPP (registered trademark)) has standardized the 5th generation mobile communication system (also referred to as 5G, New Radio (NR), or Next Generation (NG)), and is also proceeding with the specification of the next generation, such as Beyond 5G, 5G Evolution, or 6G.

[0003] For example, in 3GPP Release 18, the extension of the duplex mode is being considered. Specifically, within the carrier of the time-division duplex (TDD) band, a new duplex (duplication) mode called SBFD (Sub-Band non-overlapping Full Duplex), which enables the simultaneous use of the downlink (DL) and the uplink (UL), has been proposed. SBFD may also be read as XDD (Cross Division Duplex) (for example, Non-Patent Document 1).

[0004] " New WID: Evolution of NR duplex operation: Sub-band full duplex (SBFD)", RP-234035, 3GPP TSG RAN#102, 3GPP, December 2023

[0005] By the way, a setting in which transmission and reception are limited to only SBFD symbols or Non-SBFD symbols (hereinafter, Configuration 1), and a setting in which transmission and reception are possible with SBFD symbols and Non-SBFD symbols (hereinafter, Configuration 2) are assumed.

[0006] Against this backdrop, the inventors, after diligent investigation, focused on the case in Configuration 1 where multiple PDSCHs (Physical Downlink Shared Channels) are scheduled by a single DCI (Downlink Control Information). They found that in such a case, if acknowledgment responses (HARQ (Hybrid Automatic Repeat Request)-ACK feedback) to the PDSCHs are bundled, and the PDSCH occasion's symbol type includes an invalid symbol type, the bundled HARQ-ACK feedback will always be NACK, resulting in a meaningless value for the bundled HARQ-ACK feedback.

[0007] Therefore, this disclosure has been made to solve the above-mentioned problems and aims to provide a terminal, base station, wireless communication system, and wireless communication method that can appropriately operate the bundling of HARQ-ACK feedback for Configuration 1 when SBFD is assumed.

[0008] The disclosed aspect is a terminal comprising: a communication unit that communicates with a cell to which a duplexing scheme capable of simultaneous communication of uplink and downlink signals within a time-division duplex band is applied; and a control unit that, in a setting where the transmission of the uplink signal or the reception of the downlink signal is limited to either a first symbol to which the duplexing scheme is not applied or a second symbol to which the duplexing scheme is applied, performs acknowledgment bundling for a plurality of downlink channels scheduled by a single downlink control information, while excluding the influence of downlink channels among the plurality of downlink channels that include a symbol type that is invalidated in accordance with the setting, and performs acknowledgment bundling for a plurality of downlink channels.

[0009] The disclosed aspect is a base station comprising: a communication unit that communicates with a terminal via a duplexing cell capable of simultaneous communication of uplink and downlink signals within a time-division duplexing band; and a control unit that assumes the terminal performs acknowledgment bundling for a plurality of downlink channels, when acknowledgment bundling is performed for a plurality of downlink channels scheduled by a single downlink control information, in a setting where the transmission of the uplink signal or the reception of the downlink signal is limited to either a first symbol to which the duplexing bundling is not applied or a second symbol to which the duplexing bundling is applied, while excluding the influence of downlink channels among the plurality of downlink channels that include a symbol type that is invalidated in accordance with the setting.

[0010] The disclosed aspect is a wireless communication system comprising a terminal and a base station, the terminal comprising: a communication unit that communicates with a cell to which a duplexing scheme capable of simultaneous communication of uplink and downlink signals within a time-division duplex band is applied; and a control unit that performs acknowledgment bundling for a plurality of downlink channels scheduled by a single downlink control information when the transmission of the uplink signal or the reception of the downlink signal is limited to either a first symbol to which the duplexing scheme is not applied or a second symbol to which the duplexing scheme is applied, in which a setting is made to limit the bundling of acknowledgments for a plurality of downlink channels to which acknowledgments are performed, excluding the influence of downlink channels among the plurality of downlink channels that include a symbol type that is invalidated in accordance with the setting.

[0011] The disclosed aspect is a wireless communication method comprising: step A, performing communication with a cell to which a duplexing scheme capable of simultaneous communication of uplink and downlink signals within a time-division duplex band is applied; and step B, when bundling of acknowledgments for a plurality of downlink channels scheduled by a single downlink control information is performed in a setting where the transmission of the uplink signal or the reception of the downlink signal is limited to either a first symbol to which the duplexing scheme is not applied or a second symbol to which the duplexing scheme is applied, excluding the influence of downlink channels among the plurality of downlink channels that include a symbol type that is invalidated in accordance with the setting, and excluding the influence of downlink channels among the plurality of downlink channels.

[0012] Figure 1 is an overall schematic diagram of the wireless communication system 10. Figure 2 is a diagram showing the frequency range used in the wireless communication system 10. Figure 3 is a diagram showing an example configuration of wireless frames, subframes, and slots used in the wireless communication system 10. Figure 4 is a functional block diagram of the UE200. Figure 5 is a functional block diagram of the gNB100. Figure 6 is a diagram for explaining SBFD. Figure 7 is a diagram for explaining Configuration 1 and Configuration 2. Figure 8 is a diagram for explaining HARQ-ACK feedback bundling. Figure 9 is a diagram for explaining the problem. Figure 10 is a diagram for explaining Operation Example 1. Figure 11 is a diagram for explaining Operation Example 1. Figure 12 is a diagram for explaining Operation Example 1. Figure 13 is a diagram for explaining Operation Example 1. Figure 14 is a diagram for explaining Operation Example 2. Figure 15 is a diagram for explaining Operation Example 2. Figure 16 is a diagram for explaining Operation Example 2. Figure 17 is a diagram showing an example of the hardware configuration of the gNB100 and UE200. Figure 18 shows an example of the configuration of vehicle 2001.

[0013] The embodiments will be described below with reference to the drawings. Note that identical or similar reference numerals are used to denote the same functions and components, and their descriptions will be omitted as appropriate.

[0014] (1) Overall schematic diagram 1 of the wireless communication system is an overall schematic diagram of the wireless communication system 10 according to the embodiment. The wireless communication system 10 is a wireless communication system in accordance with 5G New Radio (NR) and includes a Next Generation-Radio Access Network 20 (hereinafter referred to as NG-RAN20) and a terminal 200 (hereinafter referred to as UE (User Equipment) 200).

[0015] The wireless communication system 10 may also be a wireless communication system that conforms to a method called Beyond 5G, 5G Evolution, or 6G.

[0016] NG-RAN20 includes base station 100 (hereinafter referred to as gNB100). The specific configuration of the wireless communication system 10, including the number of gNB100 and UE200, is not limited to the example shown in Figure 1.

[0017] NG-RAN20 actually includes multiple NG-RAN Nodes, specifically gNBs (or ng-eNBs), and is connected to a 5G-compliant core network (5GC, not shown). Note that NG-RAN20 and 5GC may also be simply referred to as the "network".

[0018] The gNB100 is a 5G-compliant radio base station that performs 5G-compliant wireless communication with the UE200. The gNB100 and UE200 can support Massive MIMO (Multiple-Input Multiple-Output), which generates a more directional beamband by controlling radio signals transmitted from multiple antenna elements; carrier aggregation (CA), which uses multiple component carriers (CCs) bundled together; and dual connectivity (DC), which enables simultaneous communication with two or more transport blocks between the UE and each of the two NG-RAN Nodes.

[0019] Furthermore, the wireless communication system 10 supports multiple frequency ranges (FR). Figure 2 shows the frequency ranges used in the wireless communication system 10.

[0020] Firstly, the wireless communication system 10 may support multiple frequency ranges (FRs) as shown in Figure 2. For example, the wireless communication system 10 may support FR1, FR2-1, and FR2-2. The frequency bands for each FR are as follows:

[0021] FR1: 410 MHz to 7.125 GHz FR2-1: 24.25 GHz to 52.6 GHz FR2-2: Over 52.6 GHz to 71 GHz In FR1, 15, 30, or 60 kHz Sub-Carrier Spacing (SCS) may be used, and a bandwidth (BW) of 5 to 100 MHz may be used. FR2 is a higher frequency than FR1, and 60 kHz or 120 kHz (240 kHz may be included) SCS may be used, and a bandwidth (BW) of 50 to 400 MHz may be used.

[0022] Note that SCS may also be interpreted as numerology. Numerology is defined in 3GPP TS38.300 and corresponds to a single subcarrier interval in the frequency domain.

[0023] Furthermore, the wireless communication system 10 may also support higher frequency bands than the FR2 frequency band. Specifically, the wireless communication system 10 may support frequency bands exceeding 52.6 GHz up to 71 GHz or 114.25 GHz.

[0024] Secondly, the wireless communication system 10 may correspond to the wireless frames, subframes, and slots shown in Figure 3.

[0025] As shown in Figure 3, one slot consists of 14 symbols, and the larger (wider) the SCS, the shorter the symbol duration (and slot duration). In addition to 15kHz, 30kHz, 60kHz, 120kHz, and 240kHz, 480kHz, 960kHz, etc., may also be used for the SCS.

[0026] Furthermore, the number of symbols constituting one slot does not necessarily have to be 14 (for example, 28 symbols, 56 symbols). In addition, the number of slots per subframe may differ depending on the SCS.

[0027] The time direction (t) shown in Figure 3 may also be called the time domain, symbol period, or symbol time. The frequency direction may also be called the frequency domain, resource block, subcarrier, or bandwidth part (BWP).

[0028] (2) Functional Block Configuration of the Wireless Communication System Next, the functional block configuration of the wireless communication system 10 will be described.

[0029] First, we will describe the functional block configuration of the UE200.

[0030] Figure 4 is a functional block diagram of the UE200. As shown in Figure 4, the UE200 comprises a wireless signal transmission / reception unit 210, an amplifier unit 220, a modulation / demodulation unit 230, a control signal / reference signal processing unit 240, an encoding / decoding unit 250, a data transmission / reception unit 260, and a control unit 270.

[0031] The wireless signal transceiver unit 210 transmits and receives wireless signals in accordance with NR. The wireless signal transceiver unit 210 supports Massive MIMO, CA which uses multiple CCs bundled together, and DC which communicates simultaneously between the UE and each of the two NG-RAN Nodes.

[0032] In this embodiment, the wireless signal transmitting / receiving unit 210 may constitute a communication unit that communicates with a duplexing cell capable of simultaneously communicating uplink signals (hereinafter referred to as UL signals) and downlink signals (hereinafter referred to as DL signals) within the time-division duplex band. The new duplexing method capable of simultaneously communicating UL signals and DL signals may be called SBFD (Sub-Band non-overlapping Full Duplex). SBFD may be read as XDD (Cross Division Duplex).

[0033] Simultaneous communication of UL and DL signals may be performed using specific time resources. These specific time resources are time resources to which SBFD can be applied. These specific time resources may also be interpreted as SBFD resources (SBFD symbol / slot) that are quasi-statically or dynamically configured in the time direction (or time domain). These specific time resources may also be interpreted as resources to which UL Sub-band(s) and DL Sub-band(s) are quasi-statically or dynamically configured simultaneously in the time direction (or time domain).

[0034] A duplexing cell may be referred to as an SBFD operation cell or an SBFD cell. Additional cells may be referred to as Additional PCI (Physical Cell Identifier) ​​cells. Additional PCI cells may include cells that operate with SBFD (SBFD operation cells) or cells that do not operate with SBFD (non-SBFD operation cells or non-SBFD cells).

[0035] The amplifier section 220 consists of components such as a PA (Power Amplifier) ​​and an LNA (Low Noise Amplifier). The amplifier section 220 amplifies the signal output from the modulation / demodulation section 230 to a predetermined power level. The amplifier section 220 also amplifies the RF signal output from the wireless signal transmission / reception section 210.

[0036] The modulation / demodulation unit 230 performs data modulation / demodulation, transmit power setting, and resource block allocation for each predetermined communication destination (gNB100 or other gNB). The modulation / demodulation unit 230 may apply Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform - Spread (DFT-S-OFDM). Furthermore, DFT-S-OFDM may be used not only for the uplink (UL) but also for the downlink (DL).

[0037] The control signal / reference signal processing unit 240 performs processing related to various control signals transmitted and received by the UE200, and processing related to various reference signals transmitted and received by the UE200.

[0038] Specifically, the control signal / reference signal processing unit 240 receives various control signals transmitted from the gNB100 via a predetermined control channel, such as control signals for the radio resource control layer (RRC). The control signal / reference signal processing unit 240 also transmits various control signals to the gNB100 via a predetermined control channel.

[0039] The control signal / reference signal processing unit 240 performs processing using reference signals (RS) such as the Demodulation Reference Signal (DMRS) and the Phase Tracking Reference Signal (PTRS).

[0040] DMRS is a terminal-specific, known reference signal (pilot signal) between the base station and the terminal used to estimate the fading channel used for data demodulation. PTRS is a terminal-specific reference signal intended to estimate phase noise, which is a problem in the high-frequency band.

[0041] In addition to DMRS and PTRS, the reference signals may also include Channel State Information-Reference Signal (CSI-RS), Sounding Reference Signal (SRS), and Positioning Reference Signal (PRS) for location information.

[0042] Also, the channels include a control channel and a data channel. The control channel includes a PDCCH (Physical Downlink Control Channel), a PUCCH (Physical Uplink Control Channel), a RACH (Random Access Channel), a Downlink Control Information (DCI) including a Random Access Radio Network Temporary Identifier (RA-RNTI), and a Physical Broadcast Channel (PBCH), etc.

[0043] Also, the data channel includes a PDSCH (Physical Downlink Shared Channel), a PUSCH (Physical Uplink Shared Channel), etc. Data means the data transmitted via the data channel. The data channel may be read as a shared channel.

[0044] Here, the control signal / reference signal processing unit 240 may receive downlink control information (DCI). As an existing field, DCI includes fields that store DCI Formats, Carrier indicator (CI), BWP indicator, FDRA (Frequency Domain Resource Assignment), TDRA (Time Domain Resource Assignment), MCS (Modulation and Coding Scheme), HPN (HARQ Process Number), NDI (New Data Indicator), RV (Redundancy Version), etc.

[0045] The value stored in the DCI Format field is an information element that specifies the DCI format. The value stored in the CI field is an information element that specifies the CC to which the DCI applies. The value stored in the BWP indicator field is an information element that specifies the BWP to which the DCI applies. The BWP that can be specified by the BWP indicator is set by an information element (BandwidthPart-Config) included in the RRC message. The value stored in the FDRA field is an information element that specifies the frequency domain resource to which the DCI applies. The frequency domain resource is identified by the value stored in the FDRA field and an information element (RA Type) included in the RRC message. The value stored in the TDRA field is an information element that specifies the time domain resource to which the DCI applies. The time domain resource is identified by the value stored in the TDRA field and an information element (pdsch-TimeDomainAllocationList, push-TimeDomainAllocationList) included in the RRC message. The time domain resource may also be identified by the value stored in the TDRA field and the default table. The value stored in the MCS field is an information element that specifies the MCS to which the DCI applies. The MCS is identified by the value stored in MCS and the MCS table. The MCS table may be specified by the RRC message or identified by RNTI scrambling. The value stored in the HPN field is an information element that specifies the HARQ Process to which DCI is applied. The value stored in NDI is an information element that determines whether the data to which DCI is applied is initial transmission data. The value stored in the RV field is an information element that specifies the redundancy of the data to which DCI is applied.

[0046] The encoding / decoding unit 250 performs data splitting / concatenation and channel coding / decoding for each predetermined communication destination (gNB100 or other gNB).

[0047] Specifically, the encoding / decoding unit 250 divides the data output from the data transmission / reception unit 260 into a predetermined size and performs channel coding on the divided data. Further, the encoding / decoding unit 250 decodes the data output from the modulation / demodulation unit 230 and concatenates the decoded data.

[0048] The data transmission / reception unit 260 performs transmission and reception of Protocol Data Unit (PDU) and Service Data Unit (SDU). Specifically, the data transmission / reception unit 260 performs assembly / disassembly of PDU / SDU in a plurality of layers (such as a media access control layer (MAC), a radio link control layer (RLC), and a packet data convergence protocol layer (PDCP)). Further, the data transmission / reception unit 260 performs error correction and retransmission control of data based on Hybrid Automatic Repeat Request (HARQ).

[0049] The control unit 270 controls each functional block that constitutes the UE200. In an embodiment, the control unit 270 may be configured to perform acknowledgment bundling for multiple downlink channels (PDSCHs) scheduled by a single downlink control information (DCI) when bundling of acknowledgments for multiple downlink channels (PDSCHs) is performed in a configuration (Configuration 1) where the transmission of uplink signals or reception of downlink signals is limited to either a first symbol (Non-SBFD symbol) to which duplexing (SBFD) is not applied or a second symbol (SBFD symbol) to which duplexing (SBFD) is applied, while excluding the influence of downlink channels that include an invalid symbol type among the multiple downlink channels (PDSCHs) that are invalidated in accordance with Configuration (Configuration 1). The above configuration may be referred to as the first configuration to distinguish it from a second configuration (Configuration 2) in which the transmission of uplink signals or reception of downlink signals is permitted on both the first symbol (Non-SBFD symbol) and the second symbol (SBFD symbol). Uplink signals may be interpreted as PUCCH, PUSCH, SRS, UCI, CSI reports, SR (Scheduling Request) reports, etc. Downlink signals may be interpreted as PDCCH, PDSCH, CSI-RS, etc.

[0050] The symbol types that are invalidated in accordance with Configuration 1 may be referred to as Invalid symbol types. For example, in Configuration 1, if the Valid symbol type is a Non-SBFD symbol type, then the Invalid symbol type is an SBFD symbol type. On the other hand, in Configuration 1, if the Valid symbol type is an SBFD symbol type, then the Invalid symbol type is a Non-SBFD symbol type. Note that the Valid symbol type may simply be referred to as a Valid symbol, the Invalid symbol type as simply an Invalid symbol, the SBFD symbol type as simply an SBFD symbol, and the Non-SBFD symbol type as simply a Non-SBFD symbol.

[0051] The valid symbol type may be determined as shown below.

[0052] For quasi-statically configured transmit or receive without Activation DCI, the Valid symbol type may be explicitly set by RRC.

[0053] For dynamically configured transmissions or receptions, the Valid symbol type may be the symbol type of the initial transmission or reception.

[0054] For PUCCH, PUSCH, type 2 CG PUSCH, SPS PDSCH, and semi-persistent SRS, the valid symbol type may be determined according to the following options.

[0055] In Option 1, the Valid symbol type of SP-CSI on PUCCH or PUSCH may be explicitly set by CSI-ReportConfig. The Valid symbol type of type 2 CG PUSCH may be explicitly set by ConfiguredGrantConfig. The Valid symbol type of SPS PDSCH may be explicitly set by SPS-Config. The Valid symbol type of Semi-persistent SRS may be explicitly set by SRS-Config, SRS-ResourceSet, or SRS-Resource.

[0056] In Option 2, the valid symbol type of the SP-CSI on the PUCCH or PUSCH may be determined based on the symbol type of the first PUCCH or PUSCH after activation. It may also be explicitly set by CSI-ReportConfig. The valid symbol type of type 2 CG PUSCH may be determined based on the symbol type of the first CG PUSCH associated with the Activation DCI. The valid symbol type of the SPS PDSCH may be determined based on the symbol type of the first SPS PDSCH associated with the Activation DCI. The valid symbol type of the semi-persistent SRS may be determined based on the symbol type of the first SRS after activation.

[0057] Secondly, the functional block configuration of the gNB100 will be described.

[0058] Figure 5 is a functional block diagram of the gNB100. As shown in Figure 5, the gNB100 has a receiving unit 110, a transmitting unit 120, and a control unit 130.

[0059] The receiver 110 receives various signals from the UE200. The receiver 110 may also receive the UL signal via PUCCH or PUSCH.

[0060] The transmitter 120 transmits various signals to the UE200. The transmitter 120 may also transmit DL signals via PDCCH or PDSCH.

[0061] In this embodiment, the receiving unit 110 and the transmitting unit 120 may constitute a communication unit that communicates with the UE200 via a duplexing redundancy cell (SBFD operation cell) capable of simultaneous communication of UL signals and DL signals within the TDD band.

[0062] The control unit 130 controls the gNB100. In an embodiment, the control unit 130 may be configured to assume that the UE200 performs acknowledgment bundling for multiple downlink channels (PDSCHs) when acknowledgment bundling is performed for multiple downlink channels (PDSCHs) scheduled by a single downlink control information (DCI) in a setting where transmission of uplink signals or reception of downlink signals is limited to either a first symbol to which duplexing bundling (SBFD) is not applied (Non-SBFD symbol) or a second symbol to which duplexing bundling (SBFD) is applied (SBFD symbol), while excluding the influence of downlink channels that include symbols that are disabled in accordance with the setting (Configuration 1).

[0063] (3) The first task will be explained in terms of resource allocation for gNB100.

[0064] In 3GPP Release 15 / 16 / 17, as shown in the upper part of Figure 6, the gNB100 sets or specifies "DL," "F (Flexible)," or "UL" for each symbol. Simultaneous communication of DL and UL signals is not permitted within a given time resource.

[0065] On the other hand, in 3GPP Release 18, as shown in the lower part of Figure 6, the gNB100 sets or designates "DL" as the symbol for one frequency resource (e.g., Sub-band(s)) and "UL" as the symbol for another frequency resource (e.g., Sub-band(s)). Simultaneous communication of DL and UL signals is permitted within a given time resource. Such a scheme may be called SBFD (Sub-Band non-overlapping Full Duplex).

[0066] Here, the PRBs constituting the DL BWP of a non-SBFD symbol and the DL Sub-band of an SBFD symbol may be referred to as DL usable PRB(s). The PRBs constituting the UL BWP of a non-SBFD symbol and the UL Sub-band of an SBFD symbol may be referred to as UL usable PRB(s).

[0067] Secondly, we will describe repeated transmission between SBFD and Non-SBFD for uplink channels such as PUCCH, PUSCH, and SRS. In such cases, as shown in Figure 7, two configurations are conceivable: a first configuration (Configuration 1) where transmission and reception are limited to SBFD symbols or Non-SBFD symbols only, and a second configuration (Configuration 2) where transmission and reception are possible with both SBFD symbols and Non-SBFD symbols. Note that while Figure 7 illustrates the case where Configuration 1 and Configuration 2 are applied to uplink signals, Configuration 1 and Configuration 2 may also be applied to downlink signals.

[0068] Thirdly, we will discuss the bundling of acknowledgments (HARQ-ACK feedback) for multiple downlink channels (PDSCHs) scheduled by a single downlink control information (DCI). Here, we will illustrate with Type 1 HARQ-ACK feedback, but the bundling may also be applicable to Type 2 HARQ-ACK feedback.

[0069] As shown in the upper part of Figure 8, if bundling does not occur in the time domain, HARQ-ACK feedback containing HARQ-ACK information corresponding to each of the multiple PDSCHs is transmitted by the PUCCH.

[0070] As shown in the lower part of Figure 8, when bundling is performed in the time domain, the logical AND of the HARQ-ACK information corresponding to each of the multiple PDSCHs (TB (Transport Block)) is calculated, and then ARQ-ACK feedback containing the result of the calculated logical AND (ACK / NACK information) is transmitted by PUCCH.

[0071] Against this backdrop, the inventors, after diligent investigation, focused on the case in Configuration 1 where multiple PDSCHs are scheduled by a single DCI (multi-PDSCH scheduling). They found that in such a case, if the bundling of HARQ-ACK feedback for PDSCHs is assumed, and the symbol type of the PDSCH occasion includes an invalid symbol type, the bundled HARQ-ACK feedback will always be NACK, resulting in a meaningless value for the bundled HARQ-ACK feedback.

[0072] Specifically, as shown in Figure 9, we will illustrate a case where PDSCHs #0 to #7 are scheduled by a single DCI (PDCCH). In such a case, existing technologies, when PDSCH #4 overlaps with a UL symbol, exclude the influence of the PDSCH overlapping with the UL symbol and perform HARQ-ACK feedback bundling for multiple PDSCHs.

[0073] However, when Configuration 1 is set in SBFD, PDSCHs that overlap with invalid symbols are not taken into consideration. For example, if PDSCH #2 overlaps with an invalid symbol, the HARQ-ACK feedback (information) value for PDSCH #2 becomes NACK, so the result of the logical AND of values ​​containing NACK will always be NACK.

[0074] (4) Definitions of Terms The following sections will explain the definitions of terms related to SBFD.

[0075] An SBFD operation cell is a serving cell in which the time or frequency position of the SBFD sub-band is set.

[0076] A non-SBFD operation cell is a serving cell in which an SBFD subband is not configured.

[0077] A semi-static DL slot / symbol is a slot / symbol configured as DL by a higher-level parameter (tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated).

[0078] A semi-static UL slot / symbol is a slot / symbol that is configured as a UL by a higher-level parameter (tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated).

[0079] A semi-static flexible slot / symbol is a slot / symbol that is set as Flexible by a higher-level parameter (tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated).

[0080] A Dynamic DL slot / symbol is a slot / symbol that is set as Flexible by a higher-level parameter (tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated) and is specified as DL by DCI Format 2_0.

[0081] A Dynamic UL slot / symbol is a slot / symbol that is set as Flexible by a higher-level parameter (tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated) and specified as UL by DCI Format 2_0.

[0082] A Dynamic Flexible slot / symbol is a slot / symbol that is set as Flexible by a higher-level parameter (tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated) and is specified as Flexible by DCI Format 2_0.

[0083] (5) Examples of Operation In order to solve the above-mentioned problems, the following examples of operation may be specified. Specifically, when multi-PDSCH scheduling and HARQ-ACK feedback bundling are performed in Configuration 1, the UE200 performs HARQ-ACK feedback bundling for multiple PDSCHs while excluding the influence of PDSCHs containing invalid symbol types from among the multiple PDSCHs. The following examples of operation are possible.

[0084] (5.1) Operation Example 1 Operation Example 1 describes Type 1 HARQ-ACK feedback for a multi-PDSCH scheduled by a single DCI. That is, it describes the case in which a Type 1 HARQ-ACK CB (Code Book) is applied to a multi-PDSCH scheduled by a single DCI.

[0085] The Type 1 HARQ-ACK CB scheme is a method in which a quasi-static codebook is set for acknowledgments (HARQ-ACK feedback).

[0086] In existing technologies, when bundling is configured in the time domain, one bit of ACK / NACK information is generated for each multi-PDSCH scheduled by a single DCI. This one bit of ACK / NACK information may also be generated for each Transport Block (TB). For each row of the TDRA, the ACK / NACK information is generated by a binary AND operation of the UL symbol and the HARQ-ACK information for the PDSCH that does not overlap.

[0087] In existing technologies, if bundling is not set in the time domain, ACK / NACK information is generated for each PDSCH occasion scheduled by a single DCI.

[0088] In existing technologies, for Type 1 HARQ-ACK CBs, the transmit power of the PUCCH is determined based on the number of PDSCH occurrences. When bundling is set in the time domain, the UE200 assumes that only one PDSCH associated with the most recent SLIV (Start and Length Indicator) was received.

[0089] Under the circumstances described above, in Operation Example 1, when bundling of HARQ-ACK feedback is performed in Configuration 1, and a quasi-static codebook (Type 1 HARQ-ACK CB) is set for HARQ-ACK feedback, the UE200 may calculate the logical AND of acknowledgments (HARQ-ACK information) for PDSCHs that do not contain invalid symbol types associated with Configuration 1 as a result of bundling HARQ-ACK feedback for multiple PDSCHs. PDSCHs that do not contain invalid symbol types may be interpreted as PDSCHs that do not overlap with invalid symbol types.

[0090] In Operation Example 1, the case in which HARQ-ACK feedback bundling is performed for multiple PDSCHs may be interpreted as the case in which a higher-layer parameter (timeDomainHARQ-BundlingType1) is provided.

[0091] Furthermore, similar to existing technologies, UE200 may calculate the logical AND of acknowledgments (HARQ-ACK information) for PDSCHs that do not overlap with UL symbols. That is, UE200 may calculate the logical AND of acknowledgments (HARQ-ACK information) for PDSCHs that do not overlap with Invalid symbol types and do not overlap with UL symbols. An example is shown below.

[0092] In Example 1-A, when the Valid symbol type is SBFD symbol type for multiple PDSCHs scheduled by one DCI, the ACK / NACK information is determined as the result of the logical AND of the HARQ-ACK information corresponding to the first / second / all TBs for PDSCH repetitions scheduled by one PDSCH that do not overlap with UL symbols and do not overlap with Non-SBFD symbols.

[0093] Example 1-A may also be expressed as follows: When the Valid symbol type is SBFD symbol type for multiple PDSCHs scheduled by one DCI, the ACK / NACK information is determined as the result of the logical AND of the HARQ-ACK information corresponding to the first / second / all TBs for the PDSCH repetition scheduled by one PDSCH and included in the SBFD symbol. It should be noted that in this reinterpretation, since the Valid symbol type is SBFD symbol type, the requirement that it not overlap with UL symbols does not need to be imposed.

[0094] In Example 1-B, when the Valid symbol type is Non-SBFD symbol type for multiple PDSCHs scheduled by one DCI, the ACK / NACK information is determined as the result of the logical AND of the HARQ-ACK information corresponding to the first / second / all TBs for a PDSCH repetition scheduled by one PDSCH that does not overlap with UL symbols and does not overlap with SBFD symbols.

[0095] Example 1-B may also be expressed as follows: When the Valid symbol type is Non-SBFD symbol type for multiple PDSCHs scheduled by one DCI, the ACK / NACK information is determined as a result of the logical AND of the HARQ-ACK information corresponding to the first / second / all TBs for PDSCH repetitions scheduled by one PDSCH that do not overlap with UL symbols and are included in Non-SBFD symbols.

[0096] Based on the embodiments described above, §9.1.2.1 “Type-1 HARQ-ACK codebook in physical uplink control channel” of 3GPP TS38.213 may be modified as follows.

[0097] In Example 1-X, the description in §9.1.2.1 “Type-1 HARQ-ACK codebook in physical uplink control channel” of 3GPP TS38.213 may be modified by introducing the expression “not overlap with invalid SBFD or non-SBFD symbol,” as shown in Figures 10 and 11. In Figures 10 and 11, modifications to the existing technology are indicated by underlines.

[0098] In Example 1-Y, as shown in Figures 12 and 13, the expressions “not overlap with SBFD symbol if the valid symbol type is non-SBFD” and “not overlap with non-SBFD symbol if the valid symbol type is SBFD” may be introduced to modify the description in §9.1.2.1 “Type-1 HARQ-ACK codebook in physical uplink control channel” of 3GPP TS38.213. Note that in Figures 12 and 13, the modifications to the existing technology are indicated by underlines.

[0099] (5.2) Operation Example 2 Operation Example 2 describes Type 2 HARQ-ACK feedback for a multi-PDSCH scheduled by a single DCI. That is, it describes the case in which a Type 2 HARQ-ACK CB (Code Book) is applied to a multi-PDSCH scheduled by a single DCI.

[0100] The Type 2 HARQ-ACK CB method is a method in which a dynamic codebook is set for acknowledgments (HARQ-ACK feedback).

[0101] In existing technologies, when bundling is set in the time domain, for Transport Block Groups (TBGs) containing PDSCHs that do not overlap with UL symbols, the ACK / NACK information of the TBG is generated by a binary AND operation of the HARQ-ACK information of the PDSCHs included in the TBG, assuming that PDSCHs that overlap with UL symbols are ACKs. For TBGs containing only PDSCHs that overlap with UL symbols, a NACK is generated.

[0102] In existing technologies, if bundling is not set in the time domain, ACK / NACK information is generated for each scheduled PDSCH in ascending order of PDSCH. For PDSCHs that overlap with UL symbols, a NACK is generated.

[0103] In existing technologies, for Type 2 HARQ-ACK CBs, when bundling is established in the time domain, the transmit power of a PUCCH is determined based on the number of TBGs that include at least one PDSCH that does not overlap with the UL symbol. When bundling is not established in the time domain, it is determined based on the number of received PDSCHs.

[0104] Under the circumstances described above, in example 2, when bundling of HARQ-ACK feedback is performed in Configuration 1, if a dynamic codebook (Type 2 HARQ-ACK CB) is set for HARQ-ACK feedback and a bundling group (TBG) is set, the UE200 may calculate the logical AND of the acknowledgments (HARQ-ACK information) for the PDSCHs included in the bundling group (TBG), assuming that the acknowledgments (HARQ-ACK information) for the PDSCHs that overlap with the symbols that are invalidated in connection with Configuration 1 are positive (ACK), for the group (TBG) that includes PDSCHs that do not overlap with the symbols that are invalidated in connection with Configuration 1.

[0105] In Operation Example 2, the case in which bundling of HARQ-ACK feedback for multiple PDSCHs is performed may be interpreted as the case in which the higher-layer parameter (nrofHARQ-BundlingGroups) is provided. The case in which bundling groups are set may be interpreted as the case in which the higher-layer parameter (nrofHARQ-BundlingGroups) is provided.

[0106] Furthermore, similar to existing technologies, UE200 may generate ACK / NACK information for a TBG containing a PDSCH that does not overlap with a UL symbol by assuming that the HARQ-ACK information for a PDSCH that overlaps with a UL symbol is ACK, and performing a binary AND operation of the HARQ-ACK information of the PDSCH contained in the TBG. In other words, UE20 may generate ACK / NACK information for a TBG containing a PDSCH that does not overlap with an Invalid symbol type and does not overlap with a UL symbol by assuming that the HARQ-ACK information for a PDSCH that overlaps with an Invalid symbol type or a UL symbol is ACK, and performing a binary AND operation of the HARQ-ACK information of the PDSCH contained in the TBG.

[0107] Under the circumstances described above, in Operation Example 2, UE200 may generate a NACK for TBGs that contain only PDSCHs that overlap with Invalid symbol types when HARQ-ACK feedback bundling is performed in Configuration 1.

[0108] Furthermore, similar to existing technologies, UE200 may generate a NACK for TBGs that contain only PDSCHs that overlap with UL symbols. In other words, UE200 may generate a NACK for TBGs that contain only PDSCHs that overlap with Invalid symbol types or UL symbols.

[0109] Based on the embodiments described above, §9.1.3.1 “Type-2 HARQ-ACK codebook in physical uplink control channel” of 3GPP TS38.213 may be modified as follows.

[0110] In Example 2-X, the description in §9.1.3.1 “Type-2 HARQ-ACK codebook in physical uplink control channel” of 3GPP TS38.213 may be modified by introducing the expression “not overlap with invalid SBFD or non-SBFD symbol,” as shown in Figures 14 and 15. In Figures 14 and 15, modifications to the existing technology are indicated by underlines.

[0111] In Operation Example 2, the number of TBGs (e.g., N_m,c^received,TBG) used in calculating the transmit power of a PUCCH for a Type 2 HARQ-ACK CB may be the number of TBGs that include at least one PDSCH that does not overlap with an invalid symbol type (invalid SBFD symbol type or invalid non-SBFD symbol type).

[0112] Furthermore, similar to existing technologies, the number of TBGs used in calculating the transmit power of a PUCCH for a Type 2 HARQ-ACK CB (e.g., N_m, c^received, TBG) may be the number of TBGs that include at least one PDSCH that does not overlap with the UL symbol. In other words, the number of TBGs used in calculating the transmit power of a PUCCH for a Type 2 HARQ-ACK CB (e.g., N_m, c^received, TBG) may be the number of TBGs that include at least one PDSCH that does not overlap with the Invalid symbol type and the UL symbol.

[0113] Based on the embodiments described above, §9.1.3.1 “Type-2 HARQ-ACK codebook in physical uplink control channel” of 3GPP TS38.213 may be modified as follows.

[0114] In Example 2-Y, as shown in Figure 16, the description in §9.1.3.1 “Type-2 HARQ-ACK codebook in physical uplink control channel” of 3GPP TS38.213 may be modified by introducing the expression “not overlap with invalid SBFD or non-SBFD symbol”. Note that in Figure 16, modifications to the existing technology are indicated by an underline.

[0115] (5.3) Other examples of operation The operation to exclude the effects of a PDSCH containing an invalid symbol type may include the operation to exclude HARQ-ACK information for a PDSCH containing an invalid symbol type from the logical AND operation, as described in Operation Example 1.

[0116] The operation to exclude the effects of PDSCH containing an invalid symbol type may include the operation of assuming that the HARQ-ACK information for PDSCH containing an invalid symbol type is an ACK, as described in Operation Example 2.

[0117] In Operation Example 2, a case may be assumed in which a bundling group is not set, that is, a case in which the upper layer parameter (nrofHARQ-BundlingGroups) is not provided. In such a case, UE200 may generate ACK / NACK information for each scheduled PDSCH in ascending order of PDSCH. UE200 may generate a NACK for PDSCHs that overlap with an invalid symbol type or UL symbol.

[0118] (6) Operation and Effects In the embodiment, when multi-PDSCH scheduling and HARQ-ACK feedback bundling are performed in Configuration 1, the UE200 excludes the influence of PDSCHs containing invalid symbol types from among the multiple PDSCHs and performs HARQ-ACK feedback bundling for multiple PDSCHs. With this configuration, the situation in which the bundled HARQ-ACK feedback is always NACK is avoided, and when SBFD is assumed, the bundling of HARQ-ACK feedback can be operated appropriately for Configuration 1.

[0119] (7) Other Embodiments Although the contents of the present invention have been described above in accordance with the embodiments, it will be obvious to those skilled in the art that the present invention is not limited to these descriptions and that various modifications and improvements are possible.

[0120] Although not specifically mentioned in the disclosure above, which of Operation Example 1 to Operation Example 2 is used (hereinafter, which mode is used) may be set by a higher-layer parameter. Which of the options in Operation Example 1 to Operation Example 2 is used (hereinafter, which mode is used) may be set by a higher-layer parameter. Which mode is supported may be reported by UE200 as UE capability(ies). Which mode is used may be predefined in the wireless communication system 20. Which mode is used may be set by a higher-layer parameter and reported by UE200 as UE capability(ies).

[0121] Although not specifically mentioned in the disclosure above, the following UE capability(ies) may be defined. UE capability(ies) may be defined for each UE200, for each FR (e.g., FR1, FR2, FR2-1, FR2-2, FR3), for each SCS, for each band, for each BC (Bandwidth Combination), or for each FC (Frequency Combination). UE capability(ies) may be included in the signals reported from the UE200 to the gNB100, or in the signals configured from the NB100 to the UE200 (RRC configuration).

[0122] Although not specifically mentioned in the disclosure above, UE capability(ies) may include information indicating whether or not it supports DL channels / signals (Configuration 1) limited to SBFD symbols only or non-SBFD symbols only.

[0123] Although not specifically mentioned in the disclosure above, UE capability(ies) may include information indicating whether or not it supports UL channels / signals limited to SBFD symbols only or non-SBFD symbols only (Configuration 1).

[0124] Although not specifically mentioned in the disclosure above, UE capability(ies) may include information indicating whether or not it supports transmission or reception (Configuration 1) limited to SBFD symbols only or non-SBFD symbols only for at least one of the following channels or signals:

[0125] - PDCCH monitoring occasions for CORESET or search space set configurations - SPS PDSCH occasions for SPS configurations - Multiple recurring PDSCH receptions - Multiple PDSCHs scheduled by one DCI - CSI-RS occasions for Periodic or Semi-Persistent configurations - CG PUSCH occasions for CG configurations - Multiple recurring PUSCH transmissions - Multiple PUSCHs scheduled by one DCI - PUSCH in multiple slots for PUSCH TBoMS - Periodic or Semi-Persistent PUCCH occasions or PUSCH occasions for Periodic or Semi-Persistent CSI reporting configurations - PUCCH occasions for SR reporting configurations - Multiple recurring PUCCH transmissions - SRS occasions for Periodic or Semi-Persistent SRS Although not specifically mentioned in the disclosure above, UE capability(ies) includes DL channels / signals (Configuration) for both SBFD symbols and Non-SBFD symbols. The system may also include information indicating whether or not it supports (2).

[0126] Although not specifically mentioned in the disclosure above, UE capability(ies) may include information indicating whether or not it supports UL channels / signals (Configuration 2) for both SBFD symbols and non-SBFD symbols.

[0127] Although not specifically mentioned in the disclosure above, UE capability(ies) may include information indicating whether it supports transmission or reception (Configuration 2) in both SBFD and non-SBFD symbols for at least one of the following channels or signals:

[0128] - PDCCH monitoring occasions in CORESET or search space set settings - SPS PDSCH occasions in SPS settings - Multiple recurring PDSCH receptions - Multiple PDSCHs scheduled by one DCI - CSI-RS occasions in Periodic or Semi-Persistent settings - CG PUSCH occasions in CG settings - Multiple recurring PUSCH transmissions - Multiple PUSCHs scheduled by one DCI - PUSCH in multiple slots for PUSCH TBoMS - Periodic or Semi-Persistent PUCCH occasions or PUSCH occasions for Periodic or Semi-Persistent CSI reporting settings - PUCCH occasions for SR reporting settings - Multiple recurring PUCCH transmissions - SRS occasions for Periodic or Semi-Persistent SRS In the disclosures above, configure, activate, update, indicate, enable, specify, and select may be interpreted as interchangeable. Similarly, link, associate, correspond, and map may be interpreted as interchangeable, and allocate, assign, monitor, and map may also be interpreted as interchangeable.

[0129] Furthermore, "specific," "dedicated," "UE specific," and "UE individual" may be interpreted interchangeably. Similarly, "common," "shared," "group-common," "UE common," and "UE shared" may be interpreted interchangeably.

[0130] The block diagrams (Figures 4 and 5) used in the description of the embodiments above show functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may be realized by combining the above one device or the above multiple devices with software.

[0131] Functions include, but are not limited to, judgment, decision, determination, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, assumption, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission is called a transmitting unit or transmitter. In any case, as mentioned above, the method of implementation is not particularly limited.

[0132] Furthermore, the gNB100 and UE200 (the device) described above may function as a computer that processes the wireless communication method of this disclosure. Figure 17 shows an example of the hardware configuration of the device. As shown in Figure 17, the device may be configured as a computer device including a processor 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, and bus 1007.

[0133] In the following explanation, the term "device" can be replaced with "circuit," "device," "unit," etc. The hardware configuration of the device may include one or more of the devices shown in the diagram, or it may be configured to omit some of the devices.

[0134] Each functional block of the device (see Figures 4 and 5) is implemented by any hardware element of the computer device, or a combination of such hardware elements.

[0135] Furthermore, each function in the device is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and memory 1002, which allows the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of the reading and writing of data in the memory 1002 and storage 1003.

[0136] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may consist of a central processing unit (CPU) that includes interfaces with peripheral devices, control units, arithmetic units, registers, and so on.

[0137] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes accordingly. The program used is one that causes the computer to execute at least a part of the operations described in the above embodiment. Moreover, the above-mentioned various processes may be executed by one processor 1001, or by two or more processors 1001 simultaneously or sequentially. The processor 1001 may be implemented by one or more chips. The program may also be transmitted from a network via a telecommunications line.

[0138] Memory 1002 is a computer-readable recording medium and may consist of at least one of the following: Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), Random Access Memory (RAM), etc. Memory 1002 may also be called a register, cache, main memory, etc. Memory 1002 can store a program (program code), software module, etc., that can execute a method according to one embodiment of this disclosure.

[0139] Storage 1003 is a computer-readable recording medium and may consist of at least one of the following: an optical disc such as a Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., Compact Disc, Digital Multipurpose Disc, Blu-ray® Disc), a smart card, flash memory (e.g., a card, stick, key drive), a floppy® disk, a magnetic strip, etc. Storage 1003 may also be called an auxiliary storage device. The recording medium described above may also be, for example, a database, server, or other suitable medium including at least one of memory 1002 and storage 1003.

[0140] The communication device 1004 is hardware (transceiver / receiver device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc.

[0141] 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 implement at least one of frequency division duplex (FDD) and time division duplex (TDD).

[0142] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, LED lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0143] Furthermore, 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 different buses may be configured for each device.

[0144] Furthermore, the device may include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and some or all of the functional blocks may be implemented by such hardware. For example, processor 1001 may be implemented using at least one of these hardware components.

[0145] Furthermore, notification of information is not limited to the embodiments / models described herein and may be carried out by other means. For example, notification of information may be carried out by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB))), other signals, or combinations thereof. RRC signaling may also be called RRC messages, and may be, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc.

[0146] Each aspect / embodiment described herein may be applied to at least one of the following: Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (where x is, for example, an integer or decimal), Future Radio Access (FRA), New Radio (NR), W-CDMA®, GSM®, CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi®), IEEE 802.16 (WiMAX®), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth®, and other appropriate systems, as well as next-generation systems extended based thereon. Furthermore, multiple systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A with 5G).

[0147] The processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described herein may be reordered, provided they are consistent with each other. For example, the methods described herein present various step elements in an exemplary order and are not limited to that specific order.

[0148] The specific operations described in this disclosure as being performed by a base station may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal can be performed by the base station and at least one other network node (for example, an MME or S-GW, but not limited to these). Although the above example illustrates a case where there is one other network node besides the base station, it may also be a combination of multiple other network nodes (for example, an MME and an S-GW).

[0149] Information and signals (such as data) can be output from a higher layer (or lower layer) to a lower layer (or higher layer). Input and output may occur via multiple network nodes.

[0150] The input and output information may be stored in a specific location (e.g., memory) or managed using a management table. The input and output information may be overwritten, updated, or appended to. Output information may be deleted. Input information may be transmitted to other devices.

[0151] The determination may be made by a value represented by one bit (0 or 1), by a boolean value (true or false), or by a numerical comparison (for example, a comparison with a predetermined value).

[0152] Each aspect / embodiment described herein may be used individually, in combination, or switched between as needed during implementation. Furthermore, notification of specific information (e.g., notification that "X is") is not limited to explicit notification, but may also be implicit (e.g., by not providing such notification).

[0153] 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, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0154] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or Digital Subscriber Line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0155] The information, signals, etc. described in this disclosure may be represented using any of the various different technologies. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0156] In addition, terms used 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 the channel and symbol may be a signal (signaling). Also, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, cell, frequency carrier, etc.

[0157] The terms “system” and “network” as used in this disclosure are interchangeable.

[0158] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a given value, or other corresponding information. For example, wireless resources may be indicated by an index.

[0159] The names used for the parameters described above are not restrictive in any way. Furthermore, the formulas and other expressions using these parameters may differ from those expressly 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 restrictive in any way.

[0160] In this disclosure, terms such as "Base Station (BS)," "wireless base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0161] A base station can house one or more (e.g., three) cells (also called sectors). If a base station houses multiple cells, the entire coverage area of ​​the base station can be divided into multiple smaller areas, each of which can also be provided with communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head: RRH)).

[0162] The terms "cell" or "sector" refer to a portion or all of the coverage area of ​​at least one of the base stations and base station subsystems that provide communication services in this coverage.

[0163] In this disclosure, the transmission of information by a base station to a terminal may be interpreted as the base station instructing the terminal to perform control or operation based on the information.

[0164] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0165] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or several other appropriate terms.

[0166] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may be 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 Internet of Things (IoT) device such as a sensor.

[0167] Furthermore, the term "base station" in this disclosure may be interpreted as "mobile station" (user terminal, hereinafter the same). For example, each aspect / embodiment of this disclosure may be applied to a configuration in which communication between a base station and a mobile station is replaced with communication between multiple mobile stations (which may be called, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). In this case, the mobile station may have the functions that a base station has. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, uplink channel, downlink channel, etc. may be interpreted as side channel.

[0168] Similarly, the term "mobile station" in this disclosure may be interpreted as "base station." In this case, the base station may be configured to have the functions that a mobile station has.

[0169] A wireless frame may consist of one or more frames in the time domain. Each of these frames in the time domain may be called a subframe.

[0170] A subframe may further consist of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0171] Numerology may be communication parameters applied to at least one of the transmission and reception of a signal or channel. Numerology may include, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processes performed by the transceiver in the frequency domain, and specific windowing processes performed by the transceiver in the time domain.

[0172] A slot may consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols or Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols). A slot may also be a time unit based on neurology.

[0173] A slot may include multiple mini-slots. Each mini-slot may consist of one or more symbols in the time domain. Mini-slots may also be called sub-slots. Mini-slots may consist of fewer 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.

[0174] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Different names may be used for each of these terms.

[0175] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. In other words, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0176] Here, TTI refers to, for example, the smallest unit of time for scheduling in wireless communication. For example, in an LTE system, the base station schedules each user terminal to allocate wireless resources (such as the frequency bandwidth and transmission power available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0177] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. Note that when a TTI is given, the actual time interval (e.g., number of symbols) in which the transport block, code block, code word, etc. are mapped may be shorter than the given TTI.

[0178] Furthermore, if one slot or one mini-slot is referred to as TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit of scheduling. In addition, the number of slots (number of mini-slots) that constitute the minimum time unit of scheduling may be controlled.

[0179] A TTI with a time length of 1ms may also be called a normal TTI, long TTI, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may also be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, mini slot, sub slot, slot, etc.

[0180] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0181] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0182] Furthermore, the time domain of RB may contain one or more symbols and may be the length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc., may each consist of one or more resource blocks.

[0183] One or more RBs may also be called Physical RBs (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0184] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0185] A Bandwidth Part (BWP), also known as a partial bandwidth, may represent a subset of consecutive common resource blocks (RBs) for a given neurology in a given carrier. Here, the common RBs may be identified by an index of the RBs relative to the carrier's common reference point. PRBs may be defined and numbered within a given BWP.

[0186] A BWP may include BWPs for UL (UL BWP) and BWPs for DL ​​(DL BWP). One or more BWPs may be configured within a single carrier for a UE.

[0187] At least one of the configured BWPs may be active, and the UE does not need to assume that it will send or receive a given signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0188] The structures described above, such as wireless frames, subframes, slots, minislots, and symbols, are merely illustrative. For example, the number of subframes included in a wireless frame, the number of slots per subframe or wireless 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, and cyclic prefix (CP) length within a TTI can be varied in various ways.

[0189] The terms “connected,” “coupled,” or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access.” As used in this disclosure, two elements may be considered to be “connected” or “coupled” with each other using at least one of one or more wires, cables, and printed electrical connections, and, in some non-limiting and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0190] The reference signal can also be abbreviated as Reference Signal (RS), and may be called a pilot depending on the applicable standard.

[0191] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0192] In the configuration of each of the above devices, "means" may be replaced with "part," "circuit," "device," etc.

[0193] Any reference to elements using designations such as “First,” “Second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, references to the First and Second elements do not imply that only two elements may be employed therein, or that the First element must precede the Second element in any way.

[0194] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0195] In this disclosure, if articles are added through translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0196] As used in this disclosure, the terms “determining” and “determining” may encompass a wide variety of actions. “Determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, or inquiring (e.g., searching in a table, database, or other data structure), or ascertaining. “Determining” may also include receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, or accessing (e.g., accessing data in memory). Furthermore, "judgment" and "decision" can include considering something as having been "judged" or "decided" after resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment" and "decision" can include considering something as having been "judged" or "decided" after some action. Also, "judgment (decision)" can be reinterpreted as "assuming," "expecting," or "considering."

[0197] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0198] Figure 18 shows an example of the configuration of vehicle 2001. As shown in Figure 18, vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013.

[0199] The drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.

[0200] The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel, which is operated by the user.

[0201] The electronic control unit 2010 consists of a microprocessor 2031, memory (ROM, RAM) 2032, and communication ports (IO ports) 2033. Signals from various sensors 2021 to 2027 installed in the vehicle are input to the electronic control unit 2010. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0202] Signals from various sensors 2021 to 2028 include current signals from the current sensor 2021 that senses motor current, front and rear wheel rotation speed signals obtained by the rotation speed sensor 2022, front and rear wheel air pressure signals obtained by the air pressure sensor 2023, vehicle speed signals obtained by the vehicle speed sensor 2024, acceleration signals obtained by the acceleration sensor 2025, accelerator pedal depression signals obtained by the accelerator pedal sensor 2029, brake pedal depression signals obtained by the brake pedal sensor 2026, shift lever operation signals obtained by the shift lever sensor 2027, and detection signals obtained by the object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0203] The Information Services Unit 2012 consists of various devices for providing various types of information, such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, television, and radio, and one or more ECUs that control these devices. The Information Services Unit 2012 uses information acquired from external devices via a communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of Vehicle 1.

[0204] The driver assistance system unit 2030 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System)), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 2030 also sends and receives various information via the communication module 2013 to realize driver assistance functions or autonomous driving functions.

[0205] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 1 via its communication port. For example, the communication module 2013 sends and receives data via the communication port 2033 between the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, axle 2009, the microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 2028 provided in the vehicle 2001.

[0206] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station or a mobile station.

[0207] The communication module 2013 transmits current signals from current sensors input to the electronic control unit 2010 to an external device via wireless communication. The communication module 2013 also transmits, via wireless communication, other signals input to the electronic control unit 2010, including front and rear wheel rotation speed signals obtained by the rotation speed sensor 2022, front and rear wheel air pressure signals obtained by the air pressure sensor 2023, vehicle speed signals obtained by the vehicle speed sensor 2024, acceleration signals obtained by the acceleration sensor 2025, accelerator pedal depression signals obtained by the accelerator pedal sensor 2029, brake pedal depression signals obtained by the brake pedal sensor 2026, shift lever operation signals obtained by the shift lever sensor 2027, and detection signals obtained by the object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0208] The communication module 2013 receives various information (traffic information, signal information, distance information, etc.) transmitted from external devices and displays it on the information service unit 2012 installed in the vehicle. The communication module 2013 also stores the various information received from external devices in memory 2032, which is available to the microprocessor 2031. Based on the information stored in memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, axles 2009, sensors 2021 to 2028, etc., installed in the vehicle 2001.

[0209] Although the present disclosure has been described in detail above, it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the intent and scope of the present disclosure as defined by the claims. Therefore, the descriptions in the present disclosure are illustrative and not intended to be restrictive in any way.

[0210] (Note) The disclosure described above may also be expressed as follows:

[0211] The first feature is a terminal comprising: a communication unit that communicates with a cell to which a duplexing scheme capable of simultaneous communication of uplink and downlink signals within a time-division duplex band is applied; and a control unit that, in a setting where the transmission of the uplink signal or the reception of the downlink signal is limited to either a first symbol to which the duplexing scheme is not applied or a second symbol to which the duplexing scheme is applied, performs acknowledgment bundling for a plurality of downlink channels scheduled by a single downlink control information, while excluding the influence of downlink channels that include symbol types that are invalidated as a result of the setting, and performs acknowledgment bundling for a plurality of downlink channels.

[0212] The second feature is that, in the first feature, the control unit is a terminal that, when a quasi-static codebook is set for the acknowledgment, calculates a logical AND of the acknowledgments for the downlink channels that do not include the symbol types that are invalidated as a result of the setting, as a result of bundling the acknowledgments for the plurality of downlink channels.

[0213] The third feature is that, in the first or second feature, when a dynamic codebook is set for the acknowledgment and a bundling group is set, the control unit calculates the logical AND of the acknowledgments for the downlink channels included in the group, assuming that the acknowledgments for the downlink channels that overlap with the symbol types that are invalidated as a result of the setting are positive, for a group that includes downlink channels that do not overlap with the symbol types that are invalidated as a result of the setting, as a result of bundling the acknowledgments for the plurality of downlink channels.

[0214] The fourth feature is a base station comprising: a communication unit that communicates with a terminal via a duplexing cell capable of simultaneous communication of uplink and downlink signals within a time-division duplexing band; and a control unit that, in a setting where the transmission of the uplink signal or the reception of the downlink signal is limited to either a first symbol to which the duplexing method is not applied or a second symbol to which the duplexing method is applied, assumes that the terminal will perform the bundling of acknowledgments for a plurality of downlink channels scheduled by a single downlink control information, while excluding the influence of downlink channels that include symbol types that are invalidated in accordance with the setting.

[0215] The fifth feature is a wireless communication system comprising a terminal and a base station, wherein the terminal includes a communication unit that communicates with a cell to which a duplexing scheme capable of simultaneous communication of uplink and downlink signals within a time-division duplex band is applied, and a control unit that performs acknowledgment bundling for a plurality of downlink channels scheduled by a single downlink control information when the transmission of the uplink signal or the reception of the downlink signal is limited to either a first symbol to which the duplexing scheme is not applied or a second symbol to which the duplexing scheme is applied, while excluding the influence of downlink channels that include symbol types that are invalidated as a result of the setting among the plurality of downlink channels.

[0216] The sixth feature is a wireless communication method comprising: step A, which performs communication with a cell to which a duplexing scheme capable of simultaneous communication of uplink and downlink signals within a time-division duplex band is applied; and step B, which, in a setting where the transmission of the uplink signal or the reception of the downlink signal is limited to either a first symbol to which the duplexing scheme is not applied or a second symbol to which the duplexing scheme is applied, performs acknowledgment bundling for a plurality of downlink channels scheduled by a single downlink control information, while excluding the influence of downlink channels among the plurality of downlink channels that include a symbol type that is invalidated in accordance with the setting, and performs acknowledgment bundling for a plurality of downlink channels.

[0217] 10 Wireless communication system 20 NG-RAN 100 gNB 110 Receiver 120 Transmitter 130 Control unit 200 UE 210 Wireless signal transmission / reception unit 220 Amplifier unit 230 Modulation / demodulation unit 240 Control signal / reference signal processing unit 250 Encoding / decoding unit 260 Data transmission / reception unit 270 Control unit 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus 2001 Vehicle 2002 Drive unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Left and right front wheels 2008 Left and right rear wheels 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication module 2021 Current sensor 2022 Rotation speed sensor 2023 Air pressure sensor 2024 Vehicle speed sensor 2025 Acceleration sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor 2030 Driver assistance system unit 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port

Claims

1. A terminal comprising: a communication unit that communicates with a cell to which a duplexing scheme capable of simultaneous communication of uplink and downlink signals within a time-division duplex band is applied; and a control unit that, in a setting where the transmission of the uplink signal or the reception of the downlink signal is limited to either a first symbol to which the duplexing scheme is not applied or a second symbol to which the duplexing scheme is applied, performs acknowledgment bundling for a plurality of downlink channels scheduled by a single downlink control information, while excluding the influence of downlink channels among the plurality of downlink channels that include a symbol type that is invalidated in accordance with the setting, and performs acknowledgment bundling for a plurality of downlink channels.

2. The terminal according to claim 1, wherein, when a quasi-static codebook is set for the acknowledgment, the control unit calculates a logical AND of the acknowledgments for the downlink channels that do not include the symbol types that are invalidated as a result of the setting, as a result of bundling the acknowledgments for the plurality of downlink channels.

3. The terminal according to claim 1, wherein, when a dynamic codebook is set for the acknowledgment and a bundling group is set, the control unit calculates the logical AND of the acknowledgments for the downlink channels included in the group, assuming that the acknowledgments for the downlink channels that overlap with the symbol types that are invalidated as a result of the setting are positive, for a group that includes downlink channels that do not overlap with the symbol types that are invalidated as a result of the setting, as a result of bundling the acknowledgments for the plurality of downlink channels.

4. A base station comprising: a communication unit that communicates with a terminal via a duplexing cell capable of simultaneous communication of uplink and downlink signals within a time-division duplexing band; and a control unit that, in a setting where the transmission of the uplink signal or the reception of the downlink signal is limited to either a first symbol to which the duplexing method is not applied or a second symbol to which the duplexing method is applied, assumes that the terminal performs the bundling of acknowledgments for a plurality of downlink channels scheduled by a single downlink control information, while excluding the influence of downlink channels among the plurality of downlink channels that include a symbol type that is invalidated in accordance with the setting.

5. A wireless communication system comprising a terminal and a base station, wherein the terminal includes a communication unit that communicates with a cell to which a duplexing scheme capable of simultaneous communication of uplink and downlink signals within a time-division duplex band is applied, and a control unit that performs acknowledgment bundling for a plurality of downlink channels scheduled by a single downlink control information when the transmission of the uplink signal or the reception of the downlink signal is limited to either a first symbol to which the duplexing scheme is not applied or a second symbol to which the duplexing scheme is applied, while excluding the influence of downlink channels that include symbol types that are invalidated as a result of the setting among the plurality of downlink channels.

6. A wireless communication method comprising: step A, which communicates with a cell to which a duplexing scheme capable of simultaneous communication of uplink and downlink signals within a time-division duplex band is applied; and step B, which, in a setting where the transmission of the uplink signal or the reception of the downlink signal is limited to either a first symbol to which the duplexing scheme is not applied or a second symbol to which the duplexing scheme is applied, performs acknowledgment bundling for a plurality of downlink channels scheduled by a single downlink control information, excluding the influence of downlink channels among the plurality of downlink channels that include a symbol type that is invalidated in accordance with the setting.

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